CN117388728B - Battery detection circuit, method and electronic equipment - Google Patents

Abstract

The present application relates to the field of electronic technology, and discloses a battery detection circuit, method and electronic device. The battery detection circuit includes: a switch module, a voltage divider module and an input module. The first end of the switch module is connected to the fuse module and the identification module of the battery; the two ends of the voltage divider module are respectively connected to the identification module and the input module of the battery. When the control switch module is in an open state and the control input module outputs a low level, the newness of the battery can be determined. In addition, when the control switch module is in a closed state and the control input module outputs a high level, the battery model and/or manufacturer can be determined. In this way, based on the above-mentioned battery detection circuit, the identification of the newness and manufacturer of the battery can be realized, and then, the battery can be charged according to different charging strategies and charging parameters.

Description

Battery detection circuit, method and electronic equipment

Technical Field

The present application relates to the field of electronic technology, and in particular to a battery detection circuit, method and electronic equipment.

Background technique

Currently, some batteries have built-in battery management chips. The battery management chip has an anti-counterfeiting integrated circuit (IC) that uniquely identifies the battery. When the battery needs to be charged, mobile phones and other electronic devices can read the anti-counterfeiting IC in the battery management chip, distinguish different battery manufacturers through the anti-counterfeiting IC, and select the charging parameters of the corresponding battery manufacturer (such as the optimal current range, etc.) for charging.

In addition, the electronic device can also record the number of times the battery is charged and discharged, and determine the age of the battery by analyzing the number of times the battery is charged and discharged, so as to select a corresponding charging strategy. For example, if the number of times the battery is charged is 0, the battery is determined to be a new battery; if the number of times the battery is charged is greater than a preset number of times, the battery is determined to be an old battery; wherein the total capacity charged to the new battery is greater than the total capacity charged to the old battery.

However, in some cases, if there is no anti-counterfeiting IC in the battery, the electronic device cannot determine the manufacturer of the battery and cannot select the corresponding charging parameters to charge the battery. In addition, when replacing an old battery with a new one, if there is no anti-counterfeiting IC in both the old and new batteries, the electronic device will not be able to detect the replacement of the battery based on the anti-counterfeiting IC and will still use the charging strategy corresponding to the old battery to charge the new battery.

Therefore, when there is no anti-counterfeiting IC in the battery, how to determine the manufacturer of the battery and the age of the battery in order to select appropriate charging parameters and charging strategies to charge the battery is an issue that urgently needs to be solved.

Summary of the invention

To solve the above problems, embodiments of the present application provide a battery detection circuit, method and electronic device.

In a first aspect, the present application provides a battery detection circuit, comprising: a switch module, a voltage divider module and an input module; wherein the first end of the switch module is connected to the fuse module and the identification module of the battery; the two ends of the voltage divider module are respectively connected to the identification module and the input module of the battery; wherein, when the switch module is in an on state and the input module applies a first voltage to the voltage divider module, the identification module end of the battery has a second voltage, wherein the second voltage can be used to determine the model of the battery.

In the present application, the switch module may be the switch module 106 mentioned later; the voltage divider module may be the voltage divider module 107 mentioned later; the input module may be the input module 108 mentioned later; the identification module may be the identification module 104 mentioned later; the fuse module may be the fuse module 105 mentioned later; the first voltage may be the voltage corresponding to the high level output by the input module 108 mentioned later; the second voltage may be the voltage value detected when identifying the battery manufacturer mentioned later.

It can be understood that in the present application, the battery includes a fuse module and an identification module. Since the identification modules in batteries of different models and/or manufacturers have different resistance values, the resistance value of the identification module is obtained by detecting the voltage value at both ends of the identification module, thereby distinguishing the battery model and/or manufacturer.

In some embodiments, one end of the fuse module is connected to the positive electrode of the battery, and the other end is connected to the identification module. One end of the switch module is connected to the fuse module and the identification module, and the other end is grounded. One end of the voltage divider module is connected to the identification module, and the other end is connected to the input module. When the processor controls the switch module to be turned on and controls the input module to output a high level, the resistance value of the identification module can be obtained by detecting the voltage value at both ends of the identification module, thereby distinguishing the battery model and/or manufacturer.

In a possible implementation of the first aspect above, the circuit also includes: a processing module, which is used to control the switch module to be in an on state and control the input module to apply a first voltage to the voltage divider module when a first detection instruction for identifying the battery model is detected; and the processing module is also used to: when the switch module is in an on state and the input module applies the first voltage to the voltage divider module, obtain a second voltage at the identification module end of the battery, and determine the battery model based on the first voltage and the second voltage.

In the present application, the processing module may be the processing module 600 mentioned later; the first detection instruction may be the instruction for identifying the battery model and/or manufacturer mentioned later; the first voltage may be the voltage corresponding to the high level output by the input module 108 mentioned later; the second voltage may be the voltage value detected when identifying the battery manufacturer mentioned later.

In the embodiment of the present application, the processing module is used to control the switch state of the switch module, and the processing module is also used to control the input module to output a high level or a low level.

In some embodiments, when the processing module controls the switch module to be turned on and controls the input module to output a high level, the resistance value of the identification module can be obtained by detecting the voltage value across the identification module, thereby distinguishing the battery model and/or manufacturer.

In a possible implementation of the first aspect above, the processing module is also used to determine the first current corresponding to the identification module based on the first voltage, the second voltage and the first resistance corresponding to the voltage divider module, and when the processing module determines the first current corresponding to the identification module, the processing module determines the second resistance corresponding to the identification module based on the first current and the second voltage, and determines the battery model based on the second resistance corresponding to the identification module.

In the present application, the first current may be the current passing through the identification module calculated when identifying the battery manufacturer mentioned later; the first resistance may be the resistance of the voltage divider module mentioned later; and the second resistance may be the resistance of the identification module mentioned later.

In the present application, when identifying the battery manufacturer, the current passing through the identification module can be determined by the first voltage, the second voltage and the first resistance, and the resistance of the identification module can be determined based on the voltage and current at both ends of the identification module. Since identification modules of different models and/or manufacturers have different resistance values, the model and/or manufacturer of the identification module can be determined based on the resistance value of the identification module.

In a possible implementation of the first aspect above, the processing module is also used to: when a second detection instruction for identifying the battery usage level is detected, control the switch module to be in an off state, and control the input module to apply a third voltage to the voltage divider module; and, when the switch module is in an off state and the input module applies a third voltage to the voltage divider module, obtain a fourth voltage at the identification module end of the battery, and determine the battery usage level based on the fourth voltage.

In the present application, the second detection instruction can be the instruction for identifying the newness of the battery mentioned later; the third voltage can be the voltage corresponding to the low level output by the input module 108 mentioned later; the fourth voltage can be the voltage value detected when identifying the newness of the battery mentioned later.

In the embodiment of the present application, when the processing module controls the switch module to be disconnected and controls the input module to output a low level, the battery model and/or manufacturer can be distinguished by detecting the voltage value at the identification module end.

In a possible implementation of the first aspect, the relationship between the usage level of the battery and the fourth voltage includes: corresponding to the fourth voltage belonging to the first voltage range, the battery is an unused battery; corresponding to the fourth voltage belonging to the second voltage range, the battery is a used battery; wherein each voltage within the first voltage range is greater than each voltage within the second voltage range.

In the present application, the first voltage range is the first voltage interval mentioned later; the second voltage range is the third voltage interval mentioned later.

In an embodiment of the present application, when identifying the battery usage level, if the fourth voltage belongs to the first voltage range, the battery is determined to be a new battery. The first voltage range can be set based on the voltage values of multiple unused batteries at the identification module end. For example, if there are three types of batteries, the voltage of the unused model A at the identification module end is [2.8V, 3V], the voltage of the unused model B at the identification module end is [3.1V, 3.2V], and the voltage of the unused model C at the identification module end is [2.7V, 2.9V]. If the fourth voltage is within any voltage range, the battery is determined to be an unused battery (i.e., a new battery).

In some embodiments, if the fourth voltage is within the second voltage range, the battery is determined to be a used battery, wherein the second voltage range may be a lower voltage range, such as [0V, 1V].

In a possible implementation of the first aspect above, the circuit further includes: a voltage detection module, configured to detect a voltage at the identification module end; and the voltage detection module is further configured to send the voltage at the identification module end to the processing module.

In the present application, the voltage detection module may be the voltage detection module 500 mentioned later.

In the embodiment of the present application, the voltage detection module is connected to the identification module to detect the voltage at the identification module end, and the processor can directly obtain the voltage value detected by the voltage detection module.

In a possible implementation of the first aspect, the switch module includes at least one of a transistor and a controllable switch, the input module includes at least one of a universal input/output interface and a serial communication interface, and the voltage divider module includes at least one resistor.

In the present application, the switch module has an open and closed state, and the switch module includes but is not limited to a transistor and a controllable switch; the input module is used to output a high level or a low level to the battery detection circuit, and the input module includes but is not limited to a general input and output interface and a serial communication interface; the voltage divider module has a certain resistance value, which can be one or more resistors.

In a possible implementation of the first aspect above, the circuit includes a voltage detection module; the switch module includes a first transistor, the input module includes a first universal input-output interface, the voltage divider module includes a first resistor, the battery identification module includes a second resistor, and the voltage detection module includes an analog-to-digital converter; and the first end of the first transistor is connected to the first end of the battery fuse module and the first end of the second resistor; the second end of the first transistor is grounded; the first end of the first resistor is connected to the second end of the second resistor, and the second end of the first resistor is connected to the first universal input-output interface; the analog-to-digital converter is connected to the second end of the second resistor.

In the present application, the fuse module may be the fuse F1 mentioned later; the first transistor may be the transistor element in the switch module mentioned later; the first general input and output interface may be the general purpose input and output interface (GPIO) 1 mentioned later; the first resistor may be the resistor R1 mentioned later; and the second resistor may be the resistor R2 mentioned later.

In the present application, the second end of the fuse module of the battery is connected to the positive electrode of the battery, and the first end of the fuse module of the battery is connected to the first end of the resistor R2; the first end of the first transistor is connected to the first end of the fuse module of the battery and the first end of the resistor R2; the second end of the first transistor is grounded; the first end of the resistor R1 is connected to the second end of the resistor R2, and the second end of the resistor R1 is connected to the pin GPIO1; the analog-to-digital converter (ADC) is connected to the second end of the resistor R2.

In a possible implementation of the first aspect, when the first transistor is in an on state and the first universal input/output interface outputs a high level, the fuse module blows, the first resistor and the second resistor are connected in series, and the analog-to-digital converter detects a second voltage of the second resistor.

In the present application, the second end of the fuse module of the battery is connected to the positive electrode of the battery, the first end of the fuse module of the battery is connected to the first end of the first transistor, and the second end of the first transistor is grounded. When the first transistor is in the on state, the current flows from the positive electrode of the battery through the fuse module and the first transistor to the ground. In some embodiments, since the resistance of the first transistor can be ignored, the current is too large, which will cause the fuse module to melt.

In some embodiments, when the pin GPIO1 outputs a high level, current flows from the resistor R1 to the resistor R2. By detecting the voltage of the resistor R2 through the ADC, the resistance value of the resistor R2 can be obtained, thereby identifying the battery model and/or manufacturer.

In a possible implementation of the first aspect above, the first end of the first transistor is a drain, the second end of the first transistor is a source, and the third end of the first transistor is a gate; and the gate of the first transistor is connected to a second universal input-output interface, wherein the second universal input-output interface is located on a mainboard of the electronic device where the battery detection circuit is located.

In the present application, the first transistor may be the metal oxide semiconductor (MOS) transistor T1 mentioned later; the first end of the first transistor may be the drain pin N2 mentioned later; the second end of the first transistor may be the source pin N1 mentioned later; the third end of the first transistor may be the gate pin N3 mentioned later; and the second general input and output interface may be the pin GPIO2 mentioned later.

In the present application, the source pin N1 of the MOS transistor T1 is connected to the ground point (ground, GND) of the electronic device, the drain pin N2 is connected to the fuse module and the resistor R2, and the gate pin N3 is connected to the pin GPIO2. Among them, the pin GPIO2 can be connected to the input and output interface of the circuit board (such as the mainboard) of the electronic device.

In a possible implementation of the first aspect above, the circuit also includes a processing module; and the processing module controls the second general input and output interface to output a high level to the gate of the first transistor, and the first transistor is in an on state; the processing module controls the second general input and output interface to output a low level to the gate of the first transistor, and the first transistor is in an off state.

In the present application, when the processing module outputs a high level to the gate pin N3 of the MOS transistor T1 through the control pin GPIO2, the MOS transistor T1 is in a closed state; when the processing module outputs a low level to the gate pin N3 of the MOS transistor T1 through the control pin GPIO2, the MOS transistor T1 is in a disconnected state.

In a possible implementation of the first aspect above, a third resistor is further included; wherein a first end of the third resistor is connected to the first universal input/output interface; and a second end of the third resistor is grounded.

In the present application, the third resistor may be the resistor R3 mentioned below.

In the present application, a first end of the resistor R3 is connected to the pin GPIO1, and a second end is grounded. The resistor R3 is used to protect the pin GPIO1.

In a second aspect, the present application provides a battery detection method, which is applied to a battery detection circuit, wherein the battery detection circuit includes a switch module, a voltage divider module and an input module; the battery includes an identification module and a fuse module; and the method includes: when a first detection instruction for identifying the battery model is detected, controlling the switch module to be in a closed state, and controlling the input module to apply a first voltage to the voltage divider module so that the voltage divider module and the identification module are connected in series; obtaining a second voltage at the identification module end, and determining the battery model based on the second voltage value at the identification module end of the battery.

In the present application, the switch module may be the switch module 106 mentioned later; the voltage divider module may be the voltage divider module 107 mentioned later; the input module may be the input module 108 mentioned later; the identification module may be the identification module 104 mentioned later; the fuse module may be the fuse module 105 mentioned later; the first detection instruction may be the instruction for identifying the battery model and/or manufacturer mentioned later; the first voltage may be the voltage corresponding to the high level output by the input module 108 mentioned later; the second voltage may be the voltage value detected when identifying the battery manufacturer mentioned later.

In the embodiment of the present application, when identifying the battery model and/or manufacturer, the electronic device controls the switch module to close and controls the input module to output a high level. By acquiring the voltage value detected by the voltage detection module, the resistance value of the battery identification module is obtained, thereby identifying the battery model and/or manufacturer.

In a possible implementation of the second aspect above, the method also includes: when a second detection instruction for identifying the battery usage level is detected, controlling the switch module to be in an off state, and controlling the input module to apply a third voltage to the voltage divider module so that the positive electrode of the battery and the fuse module of the battery are connected in series, and the fuse module of the battery and the identification module are connected in series; obtaining a fourth voltage at the identification module end, and determining the battery usage level based on the fourth voltage value at the identification module end of the battery.

In the present application, the second detection instruction can be the instruction for identifying the newness of the battery mentioned later; the third voltage can be the voltage corresponding to the low level output by the input module 108 mentioned later; the fourth voltage can be the voltage value detected when identifying the newness of the battery mentioned later.

In an embodiment of the present application, when identifying whether a battery is new or old, the electronic device controls the switch module to disconnect and controls the input module to output a low level, and identifies whether the battery is new or old by obtaining the voltage value at the identification module end.

In a third aspect, the present application provides an electronic device, and the electronic device includes the battery detection circuit mentioned in the present application.

In a fourth aspect, the present application provides an electronic device, comprising: a battery; a battery detection circuit, the battery detection circuit comprising a processing module; a memory, the memory being used to store instructions executed by one or more processors of the electronic device, at least one processor being included in the processing module, for executing the battery detection method mentioned in the present application.

In a fifth aspect, the present application provides a readable storage medium, wherein the readable storage medium stores instructions, and when the instructions are executed on an electronic device, the electronic device executes the battery detection method mentioned in the present application.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1A is a schematic diagram showing the internal structure of a battery with a battery management chip according to some embodiments of the present application;

FIG1B is a schematic diagram showing the internal structure of a battery without a battery management chip according to some embodiments of the present application;

FIG1C is a schematic diagram showing a partial internal structure of a battery according to some embodiments of the present application;

FIG2A is a schematic diagram showing a framework structure of a battery detection circuit according to some embodiments of the present application;

FIG2B shows a schematic diagram of a battery detection circuit according to some embodiments of the present application;

FIG2C shows a schematic diagram of a battery detection circuit for identifying whether a battery is new or old according to some embodiments of the present application;

FIG2D shows a schematic diagram of a battery detection circuit for identifying a battery manufacturer according to some embodiments of the present application;

FIG3A is a schematic diagram showing a specific circuit structure of a battery detection circuit according to some embodiments of the present application;

FIG3B shows a schematic diagram of an equivalent circuit structure for distinguishing between new and old batteries according to some embodiments of the present application;

FIG3C shows a schematic diagram of an equivalent circuit structure for identifying a battery manufacturer according to some embodiments of the present application;

FIG4 is a schematic diagram showing a process of identifying the age of a battery and the battery manufacturer according to some embodiments of the present application;

FIG5 shows a schematic diagram of a specific process of identifying the age of a battery and the battery manufacturer based on a battery detection circuit according to some embodiments of the present application;

FIG6 shows a schematic diagram of a hardware structure of an electronic device according to some embodiments of the present application.

Detailed ways

The illustrative embodiments of the present application include, but are not limited to, a battery detection circuit, method, and electronic device.

In order to more clearly understand the solution of the present application, the relevant field terms involved in the present application are first explained.

Analog to digital converter (ADC): can convert the received analog voltage into a digital voltage and obtain the corresponding voltage value based on the digital voltage. For example, if the upper limit of the ADC measurement voltage is set to 3V, and the analog voltage is represented by a 4-bit digital voltage, when the digital voltage output by the ADC is 15 (i.e., 1111), it means that the measured voltage value is 3V; in addition, if the digital voltage output by the ADC is 5 (i.e., 0101), it means that the measured voltage value is 1V; if the digital voltage output by the ADC is 10 (i.e., 1010), it means that the measured voltage value is 2V. Among them, the processor can read the digital voltage on the ADC and obtain the voltage value corresponding to the digital voltage.

General purpose input output (GPIO): An input and output port that, when connected to other electronic components, can output a high level or a low level to the connected electronic components. A low level signal indicates the lowest voltage value output by the GPIO, which is generally 0V; a high level signal indicates the maximum voltage value output by the GPIO. In some cases, the high level signal can be set to a fixed voltage value. For example, the high level signal is set to 4V. When the GPIO outputs a high level signal to an electronic component, it means that a voltage of 4V is applied to the electronic component.

The following is a brief introduction to the background of the battery detection circuit mentioned in this application.

As mentioned above, the battery usually has a battery management chip, and the electronic device can read the anti-counterfeiting IC in the battery management chip, distinguish different battery manufacturers through the anti-counterfeiting IC, and determine whether to replace the battery through the anti-counterfeiting IC, so as to select appropriate charging parameters and charging strategies to charge the battery. For example, as shown in FIG1A, taking the electronic device as a mobile phone 100, and the mobile phone 100 having a built-in battery 200 as an example, the internal structure of the battery is introduced.

As shown in Figure 1A, the battery 200 includes a battery management chip 101, a protection chip 102, a transistor Q1, and the positive and negative electrodes of the battery 200, wherein the positive and negative electrodes of the battery 200 are the positive and negative electrodes of a battery cell (not shown in the figure), and the battery cell stores electrical energy and can supply power to various devices in the mobile phone 100.

In Figure 1A, one end of the battery management chip 101 is connected to the positive electrode of the battery 200, and the other end is connected to the identity recognition module of the mobile phone 100 (not shown in the figure). The identity recognition module of the mobile phone 100 can read the anti-counterfeiting IC in the battery management chip 101, distinguish different battery manufacturers through the anti-counterfeiting IC, and determine whether to replace the battery through the anti-counterfeiting IC.

One end of the protection chip 102 is connected to the positive electrode of the battery 200, and the other end is connected to the first end a of the transistor Q1. The second end b of the transistor Q1 is connected to the negative electrode of the battery 200, and the third end c of the transistor Q1 is connected to the mobile phone 100. When the protection chip 102 controls the transistor Q1 to be turned on, the current flows to the mobile phone 100 through the transistor Q1, so that power can be supplied to various devices in the mobile phone 100. In addition, when the current in the battery 200 is too large, the protection chip 102 controls the transistor Q1 to be turned off.

As mentioned above, some batteries do not have a battery management chip 101. As shown in FIG1B, taking the electronic device as a mobile phone 100 and the mobile phone 100 having a built-in battery 300 as an example, the internal structure of a battery without a battery management chip is briefly introduced.

As shown in Figure 1B, the battery 300 includes a protection chip 102, an identification module 104, a transistor Q1, and the positive and negative electrodes of the battery 300, wherein the positive and negative electrodes of the battery 300 are the positive and negative electrodes of a battery cell (not shown in the figure), and the battery cell stores electrical energy and can supply power to various devices in the mobile phone 100.

In FIG. 1B , when there is no battery management chip 101 in the battery 300 , current can flow directly from the positive electrode of the battery 300 to the mobile phone 100 , thereby supplying power to various devices in the mobile phone 100 .

In FIG1B , one end of the protection chip 102 is connected to the positive electrode of the battery 300, and the other end is connected to the first end a of the transistor Q1. The second end b of the transistor Q1 is connected to the negative electrode of the battery 300, and the third end c of the transistor Q1 is connected to the mobile phone 100. When the current of the battery 300 is less than the rated value of the protection chip 102, the protection chip 102 controls the transistor Q1 to turn on, and when the current of the battery 300 is greater than the rated value of the protection chip 102, the protection chip 102 controls the transistor Q1 to turn off.

In FIG1B , the battery 300 further includes an identification module 104, and two ends of the identification module 104 are respectively connected to the third end c of the transistor Q1 and the mobile phone 100. The identification module 104 may be a resistor element for identifying a battery identification code (ID). Since the ID resistors in batteries of different models and/or manufacturers have different resistance values, the model and/or manufacturer of the battery may be determined based on the resistance value of the ID resistor.

As shown in FIG. 1B , compared with the internal structure of the battery 200 shown in FIG. 1A , the battery 300 does not have the battery management chip 101 , and the battery manufacturer is identified by the identification module 104 in the battery 300 .

Meanwhile, in the embodiment of the present application, a fuse module 105 (eg, a fuse, etc.) may be added to the battery 300 , and the age of the battery 300 and the manufacturer of the battery 300 may be identified based on the fuse module 105 and the identification module 104 .

As shown in FIG. 1C , for the sake of convenience, only the parts related to the embodiment of the present application are shown. Inside the battery 300, one end of the fuse module 105 is connected to the positive electrode of the battery 300 (i.e., the output end of the battery 300), and the other end is connected to the identification module 104; when the battery 300 is embedded in the mobile phone 100, the identification module 104 can be connected to the ADC in the mobile phone 100. In this way, when the battery 300 supplies power to each device in the mobile phone 100, the current can also flow from the positive electrode of the battery 300 through the fuse module 105 and the identification module 104 in sequence to the ADC of the mobile phone 100. Among them, the ADC can convert the received analog voltage into a digital voltage, and the processor can directly read the voltage value of the ADC.

It should be understood that, as shown in FIG. 1B , the battery 300 also has other safety devices (ie, the protection chip 102 ), and when the fuse module 105 is in the disconnected state, the normal operation of the battery 300 can still be maintained.

As mentioned above, when there is no anti-counterfeiting IC in the battery, how to determine the manufacturer of the battery and the age of the battery in order to select appropriate charging parameters and charging strategies is a problem that urgently needs to be solved.

Since the identification modules in batteries of different models and/or manufacturers have different resistance values, the present application provides a battery detection circuit, which can detect the voltage value at both ends of the identification module to obtain the resistance value of the identification module, thereby distinguishing the battery model and/or manufacturer. At the same time, in the battery detection circuit provided by the present application, when the current flows from the positive electrode of the battery through the fuse module and the identification module to the ADC of the electronic device in sequence, the voltage value of the ADC can also be obtained to distinguish the new and old batteries; wherein, if the voltage is greater than the preset voltage value, it is determined that the battery is a new battery; if the voltage is lower than the preset voltage value, it is determined that the battery is an old battery.

Specifically, FIG2A shows a schematic diagram of the structure of a battery detection circuit, still taking the electronic device as a mobile phone 100, and the mobile phone 100 having a built-in battery 300 as an example, the battery detection circuit includes a fuse module 105, an identification module 104, and a detection circuit 400. Among them, one end of the detection circuit 400 is connected to the fuse module 105, and the other end is connected to the identification module 104. Among them, the detection circuit 400 has a disconnection state and a conduction state.

On the one hand, when the control detection circuit 400 is in the disconnected state, when the battery 300 supplies power to the mobile phone 100, the current can also pass through the fuse module 105 and the identification module 104 in sequence from the positive electrode of the battery 300. The processor of the mobile phone 100 can distinguish the new and old batteries 300 by obtaining the voltage value at the end of the identification module 104. If the voltage value is greater than the preset voltage value, it means that the fuse module 105 in the battery 300 is in the on state, and the battery 300 is determined to be a new battery; if the voltage is lower than the preset voltage value, it means that the fuse module 105 in the battery 300 is in the disconnected state, and the battery 300 is determined to be an old battery. On the other hand, when the control detection circuit 400 is in the closed state, the processor of the mobile phone 100 can obtain the resistance value of the identification module 104 by obtaining the voltage value at the end of the identification module 104, thereby identifying the model and/or manufacturer of the battery 300.

Specifically, as shown in FIG2B , the detection circuit 400 may include a switch module 106, a voltage divider module 107, an input module 108, a voltage detection module 500, and a processing module 600. Among them, one end of the switch module 106 is connected to the fuse module 105 and the identification module 104, and the other end is grounded. One end of the voltage divider module 107 is connected to the identification module 104 and the voltage detection module 500, and the other end is connected to the input module 108. In addition, the processing module 600 can be used to control the switch state of the switch module 106; and the processing module 600 can also input the detection voltage to the battery detection circuit by controlling the input module 108; the processing module 600 can also be used to obtain the voltage value detected by the voltage detection module 500.

On the one hand, when identifying whether the battery 300 is new or old, the processor of the mobile phone 100 can distinguish whether the battery 300 is new or old by reading the voltage value of the voltage detection module 500. Specifically, the processing module 600 can control the switch module 106 to be disconnected, and control the input module 108 to output a low level (i.e., 0V voltage). At this time, the circuit structure is shown in FIG. 2C, and the current flows from the positive electrode of the battery 300 to the voltage detection module 500 after passing through the fuse module 105 and the identification module 104 in sequence. The processing module 600 can read the voltage value on the voltage detection module 500. If the voltage value is greater than the preset voltage value, it means that the current can flow from the positive electrode of the battery 300 to the voltage detection module 500, that is, the fuse module 105 in the battery 300 is in the on state, and it is determined that the battery 300 is a new battery; if the voltage is lower than the preset voltage value, it means that the fuse module 105 in the battery 300 is in the off state, and it is determined that the battery 300 is an old battery.

In addition, when identifying the model and/or manufacturer of the battery 300, the processor of the mobile phone 100 can obtain the voltage value at both ends of the identification module 104 to obtain the resistance value of the identification module 104, thereby distinguishing the model and/or manufacturer of the battery 300. Specifically, the processing module 600 can control the switch module 106 to close, and control the input module 108 to input a detection voltage (for example, input a voltage of 5V) to the circuit. In some cases, since the resistance value of the switch module 106 can be ignored, the current flows directly from the positive electrode of the battery 300 through the fuse module 105 to the ground, and the current is too large to cause the fuse module 105 to disconnect. At this time, the circuit can be as shown in Figure 2D. Since one end of the identification module 104 is connected to the voltage detection module 500 to detect the voltage, and one end is grounded, the voltage value of the voltage detection module 500 read by the processor is the voltage value at both ends of the identification module 104. Based on the detection voltage input by the input module 108, the resistance value of the voltage divider module 107, and the detected voltage value across the identification module 104, the resistance value of the identification module 104 can be obtained, thereby distinguishing the model and/or manufacturer of the battery 300, and selecting corresponding charging parameters based on the model and/or manufacturer of the battery 300 to charge the battery 300.

Thus, in this application, the age, model and manufacturer of a battery can be identified through a battery detection circuit, and the battery can be charged according to different charging strategies and charging parameters.

In some embodiments, the switch module 106 may include a metal-oxide-semiconductor (MOS) transistor, and the switch state of the MOS transistor is controlled by connecting the GPIO pin. At the same time, the GPIO pin can be connected to the mainboard of the mobile phone 100, and the processing module 600 can close the MOS transistor when controlling the GPIO pin to output a high level to the MOS transistor, and the switch module 106 is in a closed state. When the processing module 600 controls the GPIO pin to output a low level to the MOS transistor, the MOS transistor can be disconnected, and the switch module 106 is in an open state. In addition, in some embodiments, when the MOS transistor is closed, the resistance of the MOS transistor can be ignored. In some embodiments, the input module can be a GPIO pin, wherein the GPIO pin can be connected to the mainboard of the mobile phone 100, and is used to output a high level or a low level to the battery detection circuit.

In other embodiments, the switch module 106 may also be any electronic component having an open state and a closed state, such as a switch, etc. The present application does not limit the specific form of the switch module 106.

In some embodiments, the switch module 106 may also be located in the battery 300 , and the present application does not limit the specific location of the switch module 106 .

In other embodiments, other electronic components, such as resistors, transistors, switches, etc., may be added to both ends of the switch module 106. When identifying the model and/or manufacturer of the battery 300, the voltage value detected by the voltage detection module 500 is the total voltage of the identification module 104 and the added electronic components. The voltage of the added electronic components can be detected by the ADC in the mobile phone 100. The voltage value detected by the voltage detection module 500 minus the voltage value of the added electronic components can be used to obtain the voltage across the identification module 104, thereby determining the resistance value of the identification module 104.

In other embodiments, the voltage divider module 107 may include multiple resistors, and the voltage value across the voltage divider module 107 may be obtained by subtracting the voltage value detected by the voltage detection module 500 from the voltage corresponding to the high level output by the input module. Based on the resistance value of the voltage divider module 107 and the voltage across the voltage divider module 107, the current passing through the voltage divider module 107 and the identification module 104 may be obtained, and based on the voltage across the identification module 104 and the current passing through the identification module 104, the resistance value of the identification module 104 may be determined, thereby identifying the manufacturer of the battery 300.

The following takes the circuit elements in each module mentioned above as an example, and introduces the battery detection circuit mentioned in the embodiment of the present application based on Figures 3A, 3B and 3C.

In the embodiment of the present application, as shown in FIG3A , there are fuses F1 and resistors R2 in the battery. In addition, the identification of the new and old batteries and the battery manufacturers is achieved by adding MOS transistors T1, resistors R1, resistors R3, pins GPIO1 and pins GPIO2. Among them, fuse F1 is the fuse module 105 in the battery mentioned above; resistor R2 is the identification module 104 in the battery mentioned above; MOS transistor T1 is the circuit element in the switch module 106 mentioned above; pin GPIO2 can be controlled by the processing module 600 mentioned above, and the processing module 600 controls pin GPIO2 to output a high level or a low level to the MOS transistor, thereby controlling the switching state of MOS transistor T1. Resistor R1 is a circuit element in the voltage divider module 107 mentioned above; pin GPIO1 can be a circuit element in the input module 108 mentioned above.

In some embodiments, the fuse F1 and the resistor R2 are internal circuit elements of the battery. In other embodiments, the fuse F1, the resistor R2 and the MOS transistor T1 can all be internal circuit elements of the battery. The present application does not limit the specific position of the MOS transistor T1.

Specifically, the circuit scheme is shown in FIG3A , where one end of the fuse F1 is connected to the positive electrode of the battery, and the other end is connected to the resistor R2 and the drain pin N2 of the MOS transistor T1. One end of the resistor R2 is connected to the fuse F1 and the drain pin N2 of the MOS transistor T1, and the other end is connected to the resistor R1 and the node 1. Among them, the node 1 is connected to the ADC of the electronic device (i.e., the voltage detection module 500 mentioned above), and the processor of the electronic device can detect the voltage value at the node 1 by reading the voltage value of the ADC.

In addition, the source pin N1 of the MOS transistor T1 is connected to the ground point (ground, GND) of the electronic device, the drain pin N2 is connected to the fuse F1 and the resistor R2, and the gate pin N3 is connected to the pin GPIO2. Among them, the pin GPIO2 is connected to the input and output interface of the circuit board (such as the main board) of the electronic device, and the processor (that is, the processing module 600 mentioned above) can control the pin GPIO2 to output a high level or a low level to the gate pin N3 of the MOS transistor T1.

When the processor of the electronic device outputs a high level to the gate pin N3 of the MOS transistor T1 through the control pin GPIO2, the MOS transistor T1 is in a closed state, at which time the current can pass through the MOS transistor T1 and the resistance of the MOS transistor T1 can be ignored. When the processor of the electronic device outputs a low level to the gate pin N3 of the MOS transistor T1 through the control pin GPIO2, the MOS transistor T1 is in an open state, and the current cannot flow from the drain pin N2 to the source pin N1.

In FIG3A , one end of resistor R1 is connected to resistor R2 and node 1, and the other end is connected to resistor R3 and pin GPIO1. Pin GPIO1 can be connected to the input/output interface of the circuit board (e.g., motherboard) of the electronic device, and the processor of the electronic device controls pin GPIO1 to output a high level or a low level to the battery detection circuit. In addition, during the initialization of the electronic device (e.g., restart, etc.), pin GPIO1 will be in an unstable state, and resistor R3 can be added to protect pin GPIO1. Resistor R3 is also connected to GND, and does not play a role in identifying the newness and manufacturer of the battery.

In the process of identifying whether the battery is new or old, the processor can control pin GPIO2 to output a low level to the gate pin N3 of MOS transistor T1, so that MOS transistor T1 is in a disconnected state. At the same time, the processor controls pin GPIO1 to output a low level to the battery detection circuit, and the voltage value obtained by resistor R3 is 0V. At this time, the equivalent circuit structure diagram can be shown in Figure 3B, and the current flows from the positive electrode of the battery to the fuse F1, resistor R2 and resistor R1 in sequence. The voltage value at node 1 can be measured by the ADC of the electronic device, where if the voltage value is within the preset voltage range, it is determined that the battery is a new battery. Conversely, if the voltage value is lower than the preset voltage range, it is determined that the battery is an old battery. It should be understood that the voltage range interval can be arbitrarily set based on the voltage values of multiple unused batteries at node 1. For example, if there are three types of batteries, among which the voltage of the unused model A at node 1 is [2.8V, 3V], the voltage of the unused model B at node 1 is [3.1V, 3.2V], and the voltage of the unused model C at node 1 is [2.7V, 2.9V], if the voltage value at node 1 is in any voltage interval, the battery is determined to be a new battery; if the voltage value at node 1 is lower than all voltage intervals, the battery is determined to be an old battery.

In some embodiments, the voltage range of an unused battery at node 1 can be obtained by ADC detection; it can also be calculated based on the output voltage of the battery, the resistance value of resistor R2, and the resistance value of resistor R1. For example, if the output voltage of the battery is 4V to 4.4V, the resistance value of resistor R2 is 3Ω, and the resistance value of resistor R1 is 1Ω, the voltage range at node 1 can be obtained as [1V, 1.1V] based on series voltage division.

In the process of identifying the battery model and/or manufacturer, the processor of the electronic device can control the pin GPIO2 to output a high level to the gate pin N3 of the MOS transistor T1, so that the MOS transistor T1 is in a closed state, wherein when the MOS transistor T1 is closed, the current can flow from the drain pin N2 to the source pin N1, and the resistance of the MOS transistor T1 can be ignored, then the current flows directly from the positive electrode of the battery through the fuse F1 to GND, and the fuse F1 will burn out due to excessive current. At the same time, the control pin GPIO1 outputs a high level to the battery detection circuit. At this time, the equivalent circuit structure diagram can be shown in Figure 3C, where the resistor R2 and the resistor R1 are connected in series, wherein the resistor R3 is a parallel resistor of the resistor R2 and the resistor R1, and has no effect on the current on the circuit path of the resistor R2 and the resistor R1.

In FIG3C , current can flow out of GPIO1, and flow to GND through resistors R1 and R2 in sequence. Since one end of resistor R2 is grounded, the voltage corresponding to the high level output by pin GPIO1 is the total voltage of resistors R2 and R1, and the voltage at node 1 is the voltage across resistor R2. By using ADC to measure the voltage at node 1, the resistance value of resistor R2 can be obtained, thereby distinguishing the battery model and/or manufacturer.

For example, taking FIG. 3C as an example, formula (I) and formula (II) show the calculation method of the resistance value of the resistor R2 mentioned in the present application:

(one)

Among them, V is the voltage corresponding to the high level output by pin GPIO1; R2 is the resistance value of resistor R2; R1 is the resistance value of resistor R1; V1 is the measured voltage value at node 1, that is, the voltage across resistor R2; V/(R2+R1) represents the current in the circuit path of resistor R2 and resistor R1; V1/R2 represents the current passing through resistor R2.

Based on the above formula (I), the resistance value of resistor R2 can be calculated, as shown in formula (II):

(two)

Among them, R2 is the resistance value of resistor R2; V1 is the measured voltage value at node 1, that is, the voltage across resistor R2; R1 is the resistance value of resistor R1; V is the voltage corresponding to the high level output by pin GPIO1.

It should be understood that the resistor R2 in batteries of different models and/or manufacturers has different resistance values. Once the resistance value of the resistor R2 is determined, the manufacturer of the battery can be identified.

In other embodiments, the switch module 106 has an open and closed state, and may include, but is not limited to, one or more transistors, one or more controllable switches and other electronic components. The voltage divider module 107 may include, but is not limited to, one or more resistors, switches and other electronic components; the input module 108 may include, but is not limited to, any electronic component that can output a high level or a low level, such as a GPIO pin, a serial communication interface, etc. This application does not limit this.

Thus, based on the battery detection circuit, the newness and oldness of the battery, the battery model, and the battery manufacturer can be identified. Furthermore, the battery can be charged according to different charging strategies and charging parameters. For example, the total charging capacity for a new battery is higher than the total charging capacity for an old battery.

It can be understood that the above-mentioned battery detection circuit of the present application can be applied to electronic devices, wherein the electronic device can be any electronic device with a built-in battery, such as a mobile phone, a tablet computer, a laptop computer, a wearable device (for example, including: a watch, a smart ring, a bracelet, a pedometer, etc.), a car, an Internet of Things (IoT) device (for example, including: a weight scale, an oven, etc.), a smart door lock, etc. The form of the electronic device is not specifically limited in the embodiments of the present application.

Correspondingly, based on the above-mentioned battery detection circuit, an embodiment of the present application also provides a battery detection method. In the method of the present application, when the detection cycle is reached or the battery interface is detected to have a battery plugging and unplugging operation, the electronic device will be triggered to execute the battery detection method. First, the electronic device will control the switch module to disconnect, and control the input module to output a low level, and identify the newness of the battery by obtaining the voltage value detected by the voltage detection module. Next, the electronic device will control the switch module to close, and control the input module to output a high level, and obtain the voltage value detected by the voltage detection module to obtain the resistance value of the battery identification module, thereby identifying the model and/or manufacturer of the battery.

In some embodiments, as shown in FIG. 2B , the detection circuit 400 may include a switch module 106 , a voltage divider module 107 , and an input module 108 .

The following is a brief introduction to the battery detection method mentioned in the embodiment of the present application based on the flow chart shown in FIG. 4 .

Specifically, the battery detection method can be performed by an electronic device, and the method includes the following steps:

S401: A battery detection instruction is detected.

It is understood that in the embodiment of the present application, the instruction for detecting the battery detection may include: reaching the detection cycle (e.g., performing a detection every 5 days), detecting that the electronic device is restarted, or detecting that the battery has a battery-to-battery (BTB) operation of plugging and unplugging the battery, which is not limited in the embodiment of the present application. Among them, the BTB is a battery connection interface that can detect whether the battery is inserted or unplugged.

In the embodiment of the present application, the battery detection instruction can be divided into an instruction for identifying the newness of the battery and an instruction for identifying the battery manufacturer.

S402: Control the switch module to disconnect.

It can be understood that in the embodiment of the present application, after receiving the battery detection instruction for identifying whether the battery is new or old, the processor of the electronic device will first control the switch module to disconnect, and the switch module is in the disconnected state.

In some embodiments, the switch module may include a MOS tube, and the switch state of the MOS tube may be controlled by a GPIO pin. The GPIO pin may be connected to the input and output interface of the mainboard of the electronic device, and the GPIO pin may be controlled by the processor of the electronic device to output a high level or a low level. At the same time, the GPIO pin is also connected to the MOS tube, and when the GPIO pin outputs a low level, the MOS tube receives the low level and is in a disconnected state.

S403: Control the input module to output a low level.

It can be understood that in the embodiment of the present application, the processor of the electronic device can be used to control the input module to output a low level (ie, 0V) to the battery detection circuit.

In some embodiments, the input module may be a GPIO pin, wherein the GPIO pin may be connected to an input/output interface of a motherboard of an electronic device, and the processor of the electronic device may control the GPIO pin to output a high level or a low level to the battery detection circuit.

It should be understood that the present application does not limit the order of step S402 and step S403, that is, step S402 may be executed first, and then step S403; or, step S403 may be executed first, and then step S402; or, step S402 and step S403 may be executed simultaneously.

S404: Acquire a first voltage value detected by the voltage detection module.

It can be understood that in the embodiment of the present application, the first voltage value detected by the voltage detection module can be directly read by the processor.

In some embodiments, the voltage detection module may be an ADC in an electronic device, and the processor may directly read the voltage value of the ADC.

In some embodiments, referring to FIG. 2B , when the switch module 106 is controlled to be in an off state through step S402, and the input module 108 is controlled to output a low level through step S403, the circuit structure may be as shown in FIG. 2C , where the current flows from the positive electrode of the battery 300 through the fuse module 105 and the identification module 104 to the voltage detection module 500 in sequence. By reading the voltage value on the voltage detection module 500, the newness of the battery 300 can be determined.

S405: Determine whether the first voltage value is within the first voltage range. If yes, proceed to S406; if no, proceed to S407.

It can be understood that in the embodiment of the present application, if the first voltage value detected by the voltage detection module is within the first voltage range, then go to step S406 to determine that the battery is a new battery; if the first voltage value detected by the voltage detection module is not within the first voltage range, then go to step S407 to determine that the battery is an old battery.

In some embodiments, the first voltage range interval may be a set of multiple voltage range intervals, wherein the first voltage range interval is set based on the voltage values of multiple unused batteries at node 1. For example, if there are three types of batteries, wherein the voltage of the unused model A at node 1 is [2.8V, 3V], the voltage of the unused model B at node 1 is [3.1V, 3.2V], and the voltage of the unused model C at node 1 is [2.7V, 2.9V], then the first voltage range interval may be {[2.7V, 2.9V], [2.8V, 3V], [3.1V, 3.2V]}. If the voltage value at node 1 is within any voltage interval, the battery is determined to be a new battery; if the voltage value at node 1 is lower than all voltage intervals, the battery is determined to be an old battery.

S406: Determine that the battery is a new one.

It can be understood that in the embodiment of the present application, when the first voltage value is within the first voltage range, the battery can be determined as a new battery, and the total charging capacity when charging the battery is large.

S407: Determine that the battery is old.

It can be understood that in the embodiment of the present application, when the first voltage value is small, for example, lower than the preset first voltage range, the battery can be determined as an old battery, and the total charging capacity when charging the battery is small.

S408: Control the switch module to close.

It can be understood that in the embodiment of the present application, after receiving a battery detection instruction for identifying the battery model and/or manufacturer, the switch module needs to be controlled to close.

In some embodiments, referring to FIG. 2B , after the switch module 106 is closed, the current flows from the positive electrode of the battery 300 to the ground through the fuse module 105 and the switch module 106. In some cases, the resistance of the switch module 106 can be ignored, and the protection mechanism of the fuse module 105 is triggered due to excessive current, causing the fuse module 105 to be in an open state.

S409: Control the input module to output a high level.

It can be understood that in the embodiment of the present application, the processor can control the input module to output a high level to the battery detection circuit.

It should be understood that the present application does not limit the order of step S408 and step S409, that is, step S408 can be executed first, and then step S409; or, step S409 can be executed first, and then step S408; or, step S408 and step S409 can be executed at the same time.

S410: Acquire a second voltage value detected by a voltage detection module.

It can be understood that in the embodiment of the present application, the second voltage value detected by the voltage detection module is the voltage value of the battery identification module. The voltage detection module can be an ADC of the electronic device, and the processor can directly read the voltage value detected by the ADC.

Wherein, referring to FIG. 2B , when the switch module 106 is controlled to be closed through step S408 and the input module 108 is controlled to output a high level through step S409, the fuse module 105 will be disconnected. In some cases, the resistance of the switch module 106 can be ignored, and the current flows from the positive electrode of the battery 300 to the ground through the fuse module 105 and the switch module 106 in sequence. Due to the excessive current, the protection mechanism of the fuse module 105 will be triggered, causing the fuse module 105 to be in a disconnected state. At this time, the circuit can be as shown in FIG. 2D , and the processing module 600 can obtain the resistance of the identification module 104 by reading the voltage value of the voltage detection module 500. Since the resistance of the identification module 104 in batteries of different models and/or manufacturers is different, the model and/or manufacturer of the battery 300 can be determined based on the obtained resistance of the identification module 104.

S411: Calculate the resistance value of the identification module based on the second voltage value.

In some embodiments, as shown in FIG2D , the voltage corresponding to the high level output by the input module 108 is the total voltage of the voltage divider module 107 and the identification module 104; the resistance of the voltage divider module 107 is a known resistance; and the second voltage value is the voltage of the identification module 104. Based on the rule that the current in the series circuit is equal everywhere, the resistance value of the identification module 104 can be obtained.

In some embodiments, as shown in FIG. 2D , the processing module 600 can obtain the current passing through the identification module 104 based on the voltage corresponding to the high level output by the input module 108, the resistance value of the voltage divider module 107, and the second voltage detected at the end of the identification module 104, and then determine the resistance value of the identification module 104 based on the current and the second voltage.

S412: Identify the model or manufacturer of the battery based on the resistance value of the identification module.

It can be understood that in the embodiment of the present application, the identification modules in batteries of different types and/or manufacturers have different resistance values. After the resistance value of the identification module is determined, the model and/or manufacturer of the battery can be identified.

S413: Execute charging strategy.

It can be understood that in the embodiment of the present application, after identifying the age of the battery, the battery model and/or the battery manufacturer, the corresponding charging strategy can be executed. For example, the charging parameters of the corresponding battery manufacturer are selected for charging; at the same time, when charging the battery, the total capacity charged to the new battery is greater than the total capacity charged to the old battery.

Thus, based on the above battery detection method, the age, model and manufacturer of the battery can be identified, and the battery can be charged according to different charging strategies and charging parameters.

In the following, in combination with the specific battery detection circuit shown in FIG. 3A above, based on the flow chart shown in FIG. 5 , the battery detection method mentioned in the present application is specifically introduced.

Specifically, each circuit element in the flowchart shown in FIG5 refers to the battery detection circuit shown in FIG3A above, and the battery detection method can be executed by an electronic device, and the method includes the following steps:

S501: A battery detection instruction is detected.

It can be understood that in the embodiment of the present application, the instructions for detecting battery detection may include: reaching the detection cycle (for example, performing a detection every 5 days), detecting that the electronic device is restarted, or detecting that the battery BTB has an operation of plugging and unplugging the battery, etc. The embodiment of the present application is not limited to this.

S502: Control pin GPIO2 outputs a low level to disconnect MOS transistor T1, and control pin GPIO1 outputs a low level.

It can be understood that in the embodiment of the present application, pin GPIO2 can be connected to the input and output interface of the circuit board (such as the mainboard) of the electronic device. When the processor controls pin GPIO2 to output a low level to the gate pin N3 of the MOS transistor T1, the MOS transistor T1 will be in a disconnected state, and the current cannot flow from the drain pin N2 to the source pin N1.

In some embodiments, the pin GPIO1 may be connected to an input/output interface of a circuit board (eg, a mainboard) of an electronic device, and the pin GPIO1 may be controlled by a processor to output a low level to a battery detection circuit.

S503: Determine whether the first voltage value at node 1 is in the first voltage interval. If yes, proceed to S504; if no, proceed to S510.

It can be understood that in the embodiment of the present application, node 1 is connected to the ADC of the electronic device, and the processor can detect the first voltage value at node 1 by reading the voltage value of the ADC. If the first voltage value is in the first voltage range, the process goes to S504, and the control pin GPIO2 outputs a high level to close the MOS transistor T1 and blow the fuse F1; if the first voltage value is not in the first voltage range, the process goes to S510 to determine whether the first voltage value at node 1 is in the third voltage range.

In some embodiments, the first voltage interval can be set based on the voltage values of multiple unused batteries at node 1. For example, if there are three types of batteries, among which the voltage of unused type A at node 1 is [2.8V, 3V], the voltage of unused type B at node 1 is [3.1V, 3.2V], and the voltage of unused type C at node 1 is [2.7V, 2.9V], if the first voltage value at node 1 is within any voltage interval, go to S504; if the first voltage value at node 1 is not within any voltage interval, go to S510.

In some embodiments, when the control pin GPIO2 outputs a low level to disconnect the MOS transistor T1 through step S502, and the control pin GPIO1 outputs a low level, the MOS transistor T1 is in a disconnected state, and the current does not pass through the resistor R3. At this time, the equivalent circuit structure diagram can be shown in Figure 3B, and the current flows from the positive electrode of the battery to the fuse F1, the resistor R2, and the resistor R1 in sequence, and the voltage value at the node 1 can be measured by the ADC of the electronic device.

S504: Control pin GPIO2 to output a high level to close MOS transistor T1 and blow fuse F1.

It can be understood that in the embodiment of the present application, after determining that the first voltage value at the node 1 is in the first voltage interval, it is also necessary to confirm whether the battery is a standard battery by blowing the fuse F1.

In some embodiments, when the control pin GPIO2 outputs a high level to the gate pin N3 of the MOS transistor T1, the MOS transistor T1 is in a closed state. When the MOS transistor T1 is closed, current can flow from the drain pin N2 to the source pin N1, and the resistance of the MOS transistor T1 can be ignored. Then, the current flows directly from the positive electrode of the battery through the fuse F1 to GND, and the fuse F1 is blown due to the excessive current.

S505: Determine whether the second voltage value at node 1 is in the second voltage interval. If not, proceed to S506; if yes, proceed to S507.

It can be understood that in the embodiment of the present application, as shown in FIG3A , after the fuse F1 is blown through the above step S504, and the control pin GPIO1 outputs a low level in the above step S502, no current flows through the battery detection circuit at this time. If it is determined that the second voltage value at the node 1 is in the second voltage interval, then go to S507 to determine that it is a new battery and clear the stored number of battery charge and discharge cycles; otherwise, go to S506 to determine that it is a non-standard battery.

It should be understood that after the fuse is blown through the above step S504, the second voltage value at node 1 can be 0V, so the second voltage interval can be set to a smaller voltage range, such as [0V, 0.1V], which is not limited in this application.

S506: Determine that the battery is a non-standard battery.

It can be understood that in the embodiment of the present application, if the first voltage value is within a larger voltage range, after the fuse F1 is blown, the second voltage value measured at the node 1 is still within a larger voltage range, indicating that the battery can still supply power to the ADC when the fuse F1 is blown, then the battery is a non-standard battery.

In some embodiments, after the fuse F1 is blown through the above step S504, it means that the circuit path between the battery and the ADC of the electronic device is cut off, and the second voltage value of the ADC read by the processor should be 0V. If the second voltage value is higher than 0V, it means that the battery does not meet the safety conditions and is a non-standard battery.

S507: Determine that the battery is a new battery, and clear the stored number of battery charge and discharge cycles.

It can be understood that in the embodiment of the present application, when it is determined through the above step S503 that the first voltage value is in the first voltage interval, and it is determined through step S505 that the second voltage value is in the second voltage interval, it is determined that the battery is a standard new battery.

In some embodiments, the number of battery charge and discharge cycles stored in the electronic device is the number of charge and discharge cycles of the old battery before the new battery is replaced. If it is determined that the battery currently embedded in the electronic device is a new battery, the stored number of battery charge and discharge cycles can be cleared.

S508: Control pin GPIO2 outputs a high level to close MOS transistor T1, and control pin GPIO1 outputs a high level.

It can be understood that in the embodiment of the present application, after identifying that the battery is a new battery, the battery manufacturer needs to be identified. In the process of identifying the battery manufacturer, the control pin GPIO2 can output a high level to the gate pin N3 of the MOS transistor T1, so that the MOS transistor T1 is in a closed state; at the same time, the control pin GPIO1 outputs a high level to the battery detection circuit.

S509: Detect the third voltage value at the node 1, and calculate the resistance value of the resistor R2 to identify the battery manufacturer.

It can be understood that in the embodiment of the present application, when the control pin GPIO2 outputs a high level to close the MOS transistor T1 through step S508, when the MOS transistor T1 is closed, the current can flow from the drain pin N2 to the source pin N1, and the resistance of the MOS transistor T1 can be ignored, then the current flows directly from the positive electrode of the battery through the fuse F1 to GND, and the fuse F1 will burn out due to excessive current. At the same time, the control pin GPIO1 outputs a high level to the battery detection circuit. At this time, the equivalent circuit structure diagram can be shown in Figure 3C, and the resistance of the resistor R2 can be obtained based on the above formula (I) and formula (II) by detecting the third voltage value at the node 1.

It should be understood that the resistor R2 in batteries from different battery manufacturers has different resistance values. Once the resistance value of the resistor R2 is determined, the manufacturer of the battery can be identified.

S510: Determine whether the first voltage value at node 1 is in the third voltage interval. If not, proceed to S511; if yes, proceed to S512.

It can be understood that in the embodiment of the present application, after determining that the first voltage value is not within the first voltage range through the above step S503, it is also necessary to determine whether the first voltage value is in the third voltage range. If so, go to S512 to determine that the battery is an old battery and store the number of charge and discharge cycles of the battery; if not, go to S511 to determine that the battery is a non-standard battery.

In some embodiments, the third voltage interval may be a lower voltage range, such as [0V, 1V]. It should be understood that the third voltage interval may be set arbitrarily, and the embodiments of the present application do not limit this.

S511: Determine that the battery is a non-standard battery.

It can be understood that in the embodiment of the present application, if it is determined through step S503 that the first voltage value is not in the first voltage interval, and it is determined through step S511 that the first voltage value is not in the third voltage interval, it can be determined that the battery is a non-standard battery.

In some embodiments, for example, if the first voltage interval is [3.8V, 4V], the second voltage interval is [0V, 3.8V], if the voltage value at node 1 is 4.2V, it means that the voltage output to the ADC is too high, which may cause the electronic device to overheat, and the battery is a non-standard battery.

S512: Determine that the battery is an old battery, and store the number of charge and discharge cycles of the battery.

It can be understood that in the embodiment of the present application, if it is determined through step S503 that the first voltage value is not in the first voltage interval, and it is determined through step S510 that the first voltage value is in the third voltage interval, it can be determined that the battery is a standard old battery.

In some embodiments, after determining that the battery is an old battery, the number of charge and discharge cycles of the battery can be stored, wherein each time the battery detection method mentioned in this application is executed, the number of charge and discharge cycles of the battery increases once. If the electronic device is not triggered to execute the battery detection method during the second charging (e.g., the detection cycle is not reached, etc.), the charging strategy corresponding to the stored number of charge and discharge cycles of the battery can be directly used for charging.

S513: Control pin GPIO2 outputs a high level to close MOS transistor T1, and control pin GPIO1 outputs a high level.

It can be understood that after identifying the battery as a standard old battery, the battery manufacturer needs to be identified. In the process of identifying the battery manufacturer, the pin GPIO2 can be controlled to output a high level to the gate pin N3 of the MOS transistor T1, so that the MOS transistor T1 is in a closed state; at the same time, the pin GPIO1 can be controlled to output a high level to the battery detection circuit.

S514: Detect a fourth voltage value at the node 1, and calculate the resistance value of the resistor R2 to identify the battery model or manufacturer.

It can be understood that in the embodiment of the present application, when the control pin GPIO2 outputs a high level to close the MOS transistor T1 through step S513, when the MOS transistor T1 is closed, the current can flow from the drain pin N2 to the source pin N1, and the resistance of the MOS transistor T1 can be ignored, then the current flows directly from the positive electrode of the battery through the fuse F1 to GND, and the fuse F1 will burn out due to excessive current. At the same time, the control pin GPIO1 outputs a high level to the battery detection circuit. At this time, the equivalent circuit structure diagram can be shown in Figure 3C, and the resistance of the resistor R2 can be obtained based on the above formula (I) and formula (II) by detecting the fourth voltage value at the node 1.

It should be understood that the resistor R2 in batteries of different models and/or manufacturers has different resistance values. Once the resistance value of the resistor R2 is determined, the model and/or manufacturer of the battery can be identified.

S515: Execute the charging strategy.

It can be understood that in the embodiment of the present application, after identifying the age, model and manufacturer of the battery, a corresponding charging strategy can be executed. For example, the charging parameters of the corresponding battery manufacturer are selected for charging; at the same time, when charging the battery, the total capacity charged to the new battery is greater than the total capacity charged to the old battery.

Thus, based on the above battery detection method, the age, model and manufacturer of the battery can be identified, and the battery can be charged according to different charging strategies and charging parameters.

An embodiment of the present application further provides an electronic device, wherein the electronic device includes the battery detection circuit mentioned above.

In addition, the electronic device also includes: a battery; a battery detection circuit, the battery detection circuit includes a processing module; a memory, the memory is used to store instructions executed by one or more processors of the electronic device, at least one processor is included in the processing module, and is used for the battery detection method mentioned in this application.

An embodiment of the present application further provides a readable storage medium, wherein the readable storage medium stores instructions, and when the instructions are executed on an electronic device, the electronic device executes the battery detection method mentioned in the present application.

An embodiment of the present application further provides a computer program product, including: a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium contains a program for executing the battery detection method mentioned in the present application.

It can be understood that the above-mentioned battery detection circuit and battery detection method of the present application can be applied to electronic devices, wherein the electronic device can be any electronic device equipped with a battery, such as a mobile phone, a tablet computer, a laptop computer, a wearable device (for example, including: a watch, a smart ring, a bracelet, a pedometer, etc.), a car, an Internet of Things (IOT) device (for example, including: a weight scale, an oven, etc.), a smart door lock, etc. The form of the electronic device is not specifically limited in the embodiments of the present application.

As shown in FIG6 , taking the electronic device as a mobile phone 100 as an example, a schematic diagram of the hardware structure of an electronic device according to an embodiment of the present application is exemplified.

As shown in Figure 6, the mobile phone 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, a mobile communication module 150, a wireless communication module 160, an audio module 170, a sensor module 180, a button 190, a motor 191, an indicator 192, a camera 193, a display screen 194, and a subscriber identification module (SIM) card interface 195, etc.

It is to be understood that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the mobile phone 100. In other embodiments of the present application, the mobile phone 100 may include more or fewer components than shown in the figure, or combine some components, or separate some components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

The processor 110 may include one or more processing units, for example, the processor 110 may include an application processor (AP), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a controller, a video codec, a digital signal processor (DSP), a baseband processor, and/or a neural-network processing unit (NPU), etc. Among them, different processing units may be independent devices or integrated into one or more processors. In an embodiment of the present application, the processor 110 may obtain the voltage value detected by the ADC, thereby determining the age of the battery and the battery manufacturer and/or model.

In the embodiment of the present application, the processor 110 may also be the processing module 600 mentioned above, which may be used to control the switch state of the switch module 106 and control the input module 108 to output a high level or a low level.

The controller can generate operation control signals according to the instruction operation code and timing signal to complete the control of instruction fetching and execution.

The processor 110 may also be provided with a memory for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory may store instructions or data that the processor 110 has just used or cyclically used. If the processor 110 needs to use the instruction or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the processor 110, and thus improves the efficiency of the system.

The USB interface 130 is an interface that complies with the USB standard specification, and specifically can be a Mini USB interface, a Micro USB interface, a USB Type C interface, etc. The USB interface 130 can be used to connect a charger to charge the mobile phone 100, and can also be used to transfer data between the mobile phone 100 and peripheral devices. It can also be used to connect headphones to play audio through the headphones. The interface can also be used to connect other electronic devices, such as virtual devices, etc.

It is understandable that the interface connection relationship between the modules illustrated in the embodiment of the present application is only a schematic illustration and does not constitute a structural limitation on the mobile phone 100. In other embodiments of the present application, the mobile phone 100 may also adopt different interface connection methods in the above embodiments, or a combination of multiple interface connection methods.

The power management module 141 is used to connect the battery 142, the charging management module 140 and the processor 110. The power management module 141 receives input from the battery 142 and/or the charging management module 140, and supplies power to the processor 110, the internal memory 121, the display screen 194, the camera 193, and the wireless communication module 160. The power management module 141 can also be used to monitor parameters such as battery capacity, battery cycle number, battery health status (leakage, impedance), etc. In some other embodiments, the power management module 141 can also be set in the processor 110. In other embodiments, the power management module 141 and the charging management module 140 can also be set in the same device.

In an embodiment of the present application, the power management module 141 can supply power to the battery detection circuit. As shown in FIG. 2C , when the model and/or manufacturer of the battery 142 is identified, the power management module 141 can supply power to the input module 108 .

The charging management module 140 is used to receive charging input from a charger. The charger may be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 140 may receive charging input from a wired charger through the USB interface 130. In some wireless charging embodiments, the charging management module 140 may receive wireless charging input through a wireless charging coil of the mobile phone 100. While the charging management module 140 is charging the battery 142, it may also power the electronic device through the power management module 141.

In an embodiment of the present application, after determining the age of battery 142 and the manufacturer and/or model of battery 142, the charging management module 140 can adopt different charging strategies to charge battery 142. For example, if battery 142 is a new battery, a higher total capacity can be controlled to be charged into battery 142; if battery 142 is an old battery, a lower total capacity can be controlled to be charged into battery 142.

The mobile communication module 150 can provide solutions for wireless communications including 2G/3G/4G/5G, etc., applied to the mobile phone 100. The mobile communication module 150 may include at least one filter, a switch, a power amplifier, a low noise amplifier (LNA), etc. The mobile communication module 150 can filter, amplify, and process the received electromagnetic waves, and transmit them to the modulation and demodulation processor for demodulation. In some embodiments, at least some of the functional modules of the mobile communication module 150 can be set in the processor 110. In some embodiments, at least some of the functional modules of the mobile communication module 150 can be set in the same device as at least some of the modules of the processor 110.

The wireless communication module 160 can provide wireless communication solutions including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), nearfield communication technology (NFC), infrared technology (IR), etc., which are applied to the mobile phone 100. The wireless communication module 160 can be one or more devices integrating at least one communication module. The wireless communication module 160 can also receive the signal to be sent from the processor 110, modulate the frequency, amplify it, and convert it into electromagnetic waves for radiation through the antenna (not shown in the figure).

The external memory interface 120 can be used to connect an external memory card, such as a Micro SD card, to expand the storage capacity of the mobile phone 100. The external memory card communicates with the processor 110 through the external memory interface 120 to implement a data storage function, such as storing music, video and other files in the external memory card.

The internal memory 121 can be used to store computer executable program codes, which include instructions. The internal memory 121 may include a program storage area and a data storage area. Among them, the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc. The data storage area may store data created during the use of the mobile phone 100 (such as audio data, a phone book, etc.), etc. In addition, the internal memory 121 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc. The processor 110 executes various functional applications and data processing of the mobile phone 100 by running instructions stored in the internal memory 121 and/or instructions stored in a memory provided in the processor.

The audio module 170 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signals. The audio module 170 can also be used to encode and decode audio signals. In some embodiments, the audio module 170 can be arranged in the processor 110, or some functional modules of the audio module 170 can be arranged in the processor 110.

The embodiments disclosed in the present application may be implemented in hardware, software, firmware or a combination of these implementation methods. The embodiments of the present application may be implemented as a computer program or program code executed on a programmable system, the programmable system including at least one processor, a storage system (including volatile and non-volatile memory and/or storage elements), at least one input device and at least one output device.

Program code can be applied to input instructions to perform the functions described in this application and generate output information. The output information can be applied to one or more output devices in a known manner. For the purposes of this application, a processing system includes any system having a processor such as, for example, a digital signal processor, a microcontroller, an application specific integrated circuit, or a microprocessor.

Program code can be implemented with high-level programming language or object-oriented programming language to communicate with the processing system. When necessary, program code can also be implemented with assembly language or machine language. In fact, the mechanism described in this application is not limited to the scope of any specific programming language. In either case, the language can be a compiled language or an interpreted language.

In the accompanying drawings, some structural or method features may be shown in a specific arrangement and/or order. However, it should be understood that such a specific arrangement and/or order may not be required. Instead, in some embodiments, these features may be arranged in a manner and/or order different from that shown in the illustrative drawings. In addition, the inclusion of structural or method features in a particular figure does not mean that such features are required in all embodiments, and in some embodiments, these features may not be included or may be combined with other features.

It should be noted that the units/modules mentioned in the various device embodiments of the present application are all logical units/modules. Physically, a logical unit/module can be a physical unit/module, or a part of a physical unit/module, or can be implemented as a combination of multiple physical units/modules. The physical implementation method of these logical units/modules themselves is not the most important. The combination of functions implemented by these logical units/modules is the key to solving the technical problems proposed by the present application. In addition, in order to highlight the innovative part of the present application, the above-mentioned device embodiments of the present application do not introduce units/modules that are not closely related to solving the technical problems proposed by the present application, which does not mean that there are no other units/modules in the above-mentioned device embodiments.

It should be noted that in the examples and description of this patent, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "including one" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Although the present application has been illustrated and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the present application.

Claims (14)

1. A battery detection circuit, characterized in that it comprises: a switch module, a voltage divider module, an input module and a processing module, wherein the switch module comprises a first transistor; wherein, The first end of the first transistor is connected to the first end of the fuse module of the battery and the first end of the identification module, the second end of the first transistor is grounded, the third end of the first transistor is connected to the first end of the processing module, the third end of the first transistor is the control end of the first transistor, the second end of the fuse module is connected to the positive electrode of the battery, the first end of the voltage divider module is connected to the second end of the identification module, the second end of the voltage divider module is connected to the first end of the input module, and the second end of the input module is connected to the second end of the processing module; The processing module is used to: In case of detecting a first detection instruction for identifying the battery usage level, controlling the switch module to be in an off state, and controlling the input module to apply a first voltage to the voltage divider module, wherein the first voltage is 0 volt; When the switch module is in an off state and the input module applies a first voltage to the voltage dividing module, a second voltage at a second end of the identification module of the battery is acquired, and the usage degree of the battery is determined based on the second voltage; When a second detection instruction for identifying a battery model is detected, the switch module is controlled to be in an on state, and the input module is controlled to apply a third voltage to the voltage dividing module; When the switch module is in the on state and the input module applies a third voltage to the voltage divider module, the second end of the identification module for obtaining the battery has a fourth voltage, and the model of the battery is determined based on the third voltage, the fourth voltage and the first resistance value corresponding to the voltage divider module. 2. The circuit according to claim 1, characterized in that the processing module is further used to determine the first current corresponding to the identification module based on the third voltage, the fourth voltage and the first resistance value corresponding to the voltage divider module, and When the processing module determines the first current corresponding to the identification module, the processing module determines the second resistance corresponding to the identification module based on the first current and the fourth voltage, and determines the model of the battery based on the second resistance corresponding to the identification module. 3. The circuit according to claim 1, wherein the relationship between the battery usage level and the second voltage comprises: Corresponding to the second voltage belonging to the first voltage range, the battery is an unused battery; Corresponding to the second voltage belonging to the second voltage range, the battery is a used battery; Wherein, each voltage within the first voltage range is greater than each voltage within the second voltage range. 4. The circuit according to claim 1, characterized in that the circuit further comprises: A voltage detection module, used to detect the voltage of the second end of the identification module; The voltage detection module is further used to send the voltage of the second end of the identification module to the processing module. 5. The circuit according to claim 1, characterized in that The input module includes at least one of a general input/output interface and a serial communication interface. The voltage dividing module includes at least one resistor. 6. The circuit according to claim 5, further comprising a voltage detection module; The input module includes a first universal input and output interface, the voltage dividing module includes a first resistor, the battery identification module includes a second resistor, and the voltage detection module includes an analog-to-digital converter. 7. The circuit according to claim 6 is characterized in that, when the first transistor is in an on state and the first universal input/output interface outputs a high level: the fuse module is blown, the first resistor and the second resistor are connected in series, and the analog-to-digital converter detects a fourth voltage of the second resistor. 8. The circuit according to claim 7, characterized in that The first terminal of the first transistor is a drain, the second terminal of the first transistor is a source, and the third terminal of the first transistor is a gate; and The processing module includes a second general purpose input and output interface, wherein the second general purpose input and output interface is located on a mainboard of the electronic device where the battery detection circuit is located. 9. The circuit according to claim 8, characterized in that The processing module controls the second general input and output interface to output a high level to the gate of the first transistor, so that the first transistor is in a conducting state; The processing module controls the second general input and output interface to output a low level to the gate of the first transistor, and the first transistor is in a disconnected state. 10. The circuit according to claim 6, further comprising a third resistor; wherein: The first end of the third resistor is connected to the first universal input and output interface; A second end of the third resistor is grounded. 11. A battery detection method, characterized in that it is applied to a battery detection circuit, wherein the battery detection circuit comprises a switch module, a voltage divider module, an input module and a processing module; the battery comprises an identification module and a fuse module; the switch module comprises a first transistor; a first end of the first transistor is connected to a first end of the fuse module of the battery and a first end of the identification module, a second end of the first transistor is grounded, a third end of the first transistor is connected to a first end of the processing module, the third end of the first transistor is a control end of the first transistor, a second end of the fuse module is connected to a positive electrode of the battery, a first end of the voltage divider module is connected to a second end of the identification module, a second end of the voltage divider module is connected to a first end of the input module, and a second end of the input module is connected to a second end of the processing module; and The method comprises: In the case of detecting a first detection instruction for identifying the battery usage level, controlling the switch module to be in an off state, and controlling the input module to apply a first voltage to the voltage divider module, wherein the first voltage is 0 volt, so that the positive electrode of the battery and the fuse module of the battery are connected in series, and the fuse module of the battery and the identification module are connected in series; Acquiring a second voltage at the second terminal of the identification module, and determining the usage degree of the battery based on the second voltage at the second terminal of the identification module of the battery; When a second detection instruction for identifying the battery model is detected, the switch module is controlled to be in a closed state, and the input module is controlled to apply a third voltage to the voltage divider module, so that the voltage divider module and the identification module are connected in series; A fourth voltage at the second end of the identification module is obtained, and the model of the battery is determined based on the third voltage, the fourth voltage and the first resistance value corresponding to the voltage dividing module. 12. An electronic device, characterized in that the electronic device comprises the battery detection circuit according to any one of claims 1 to 10. 13. An electronic device, comprising: Battery; A battery detection circuit, the battery detection circuit comprising a processing module; A memory, wherein the memory is used to store instructions executed by one or more processors of the electronic device, at least one of the processors is included in the processing module, and is used to execute the battery detection method according to claim 11. 14. A readable storage medium, characterized in that instructions are stored on the readable storage medium, and when the instructions are executed on an electronic device, the electronic device executes the battery detection method according to claim 11.