[go: up one dir, main page]

CN118539571B - Charging control device and thermometer - Google Patents

Charging control device and thermometer Download PDF

Info

Publication number
CN118539571B
CN118539571B CN202411007368.0A CN202411007368A CN118539571B CN 118539571 B CN118539571 B CN 118539571B CN 202411007368 A CN202411007368 A CN 202411007368A CN 118539571 B CN118539571 B CN 118539571B
Authority
CN
China
Prior art keywords
resistor
module
capacitor
charging
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202411007368.0A
Other languages
Chinese (zh)
Other versions
CN118539571A (en
Inventor
陈世麒
吴文龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Zhiyan Technology Co Ltd
Shenzhen Qianyan Technology Co Ltd
Original Assignee
Shenzhen Zhiyan Technology Co Ltd
Shenzhen Qianyan Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Zhiyan Technology Co Ltd, Shenzhen Qianyan Technology Co Ltd filed Critical Shenzhen Zhiyan Technology Co Ltd
Priority to CN202411007368.0A priority Critical patent/CN118539571B/en
Priority to CN202411416417.6A priority patent/CN119482794A/en
Publication of CN118539571A publication Critical patent/CN118539571A/en
Application granted granted Critical
Publication of CN118539571B publication Critical patent/CN118539571B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/02—Means for indicating or recording specially adapted for thermometers
    • G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K13/00—Thermometers specially adapted for specific purposes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H02J7/0045—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The application discloses a charging control device and a thermometer, wherein the device comprises a voltage conversion module, a charging module and a control module, the charging module comprises a first charging seat, a second charging seat, a first resistor and a second resistor, the voltage conversion module is connected with the charging module, the control module and a battery, the control module is connected with the charging module, one end of the first resistor is connected with the first charging seat and the control module, one end of the second resistor is connected with the second charging seat and the control module, the other ends of the first resistor and the second resistor are grounded, the first charging seat and the second charging seat are connected with a charged device, the voltage conversion module converts a first direct current into a second direct current and supplies power for the charging module and the control module, the charging module charges the charged device, the control module detects the voltage drop of the first resistor and the second resistor, determines the current flowing through the charged device according to the voltage drop of the first resistor and the second resistor, and controls the charging state of the charging module according to the current. In the embodiment of the application, the cost can be reduced.

Description

Charging control device and thermometer
Technical Field
The application relates to the technical field of electronic circuits, in particular to a charging control device and a thermometer.
Background
With the advent of the internet of things age, wireless devices, such as wireless thermometers, are becoming increasingly popular. The wireless thermometer is provided with a charging seat, and a wireless temperature measuring device of the wireless thermometer can be placed on the charging seat for charging. The wireless thermometer can determine whether the wireless temperature measuring device is fully charged through the current flowing through the wireless temperature measuring device, but a current detecting chip is needed for measuring the current of the wireless temperature measuring device. And the current detection chip is an integrated chip, so that the required cost is high.
Disclosure of Invention
The embodiment of the application discloses a charging control device and a thermometer, which are used for reducing cost.
In a first aspect, an embodiment of the application discloses a charging control device, which comprises a voltage conversion module, a charging module and a control module, wherein the charging module comprises a first charging seat, a second charging seat, a first resistor and a second resistor;
The voltage conversion module is respectively connected with the charging module, the first end of the control module and the battery, the second end, the third end, the fourth end and the fifth end of the control module are respectively connected with the charging module, one end of the first resistor is respectively connected with the first charging seat and the second end of the control module, one end of the second resistor is respectively connected with the second charging seat and the third end of the control module, the other end of the first resistor and the other end of the second resistor are respectively grounded, and the first charging seat and the second charging seat are respectively connected with a charged device;
The voltage conversion module is used for converting the first direct current provided by the battery into a second direct current with preset voltage, and the second direct current is used for supplying power for the charging module and the control module;
The charging module is used for charging the charged device;
The control module is used for detecting the voltage drop of the first resistor and the voltage drop of the second resistor, determining the current flowing through the charged device according to the voltage drop of the first resistor and the voltage drop of the second resistor, and controlling the charging state of the charging module according to the current.
In a second aspect, an embodiment of the present application discloses a thermometer, including the charging control device disclosed in the first aspect.
The charging control device comprises a voltage conversion module, a charging module and a control module, wherein the charging module comprises a first charging seat, a second charging seat, a first resistor and a second resistor, the voltage conversion module is respectively connected with the charging module, a first end of the control module and a battery, a second end, a third end, a fourth end and a fifth end of the control module are respectively connected with the charging module, one end of the first resistor is respectively connected with the first charging seat and the second end of the control module, one end of the second resistor is respectively connected with the second charging seat and the third end of the control module, the other end of the first resistor and the other end of the second resistor are respectively grounded, the first charging seat and the second charging seat are respectively connected with a charged device, the voltage conversion module is used for converting first direct current provided by the battery into second direct current with preset voltage, the second direct current is used for supplying power to the charging module and the control module, the charging module is used for charging the charged device, and the control module is used for detecting the voltage drop of the first resistor and the voltage drop of the second resistor, and determining current flowing through the charged device according to the voltage drop of the first resistor and the voltage drop of the second resistor, and the current flowing through the charged device is determined according to the voltage drop of the first resistor. Therefore, the voltage drop of the two resistors can be measured firstly, and then the current flowing through the charged device can be determined according to the voltage drop of the two resistors, namely, the current flowing through the charged device can be determined only by the two resistors, a special integrated chip is not needed, and the cost of the charging control device can be reduced. In addition, the control module can control the charging state of the charging module according to the current flowing through the charged device, so that the charged device can use large current for charging under the condition that the charged device needs large current for charging, and can use small current for charging under the condition that the charged device does not need large current for charging, thereby realizing the flexibility of charging, quick charging and overshoot prevention, and saving power consumption.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a charging control device according to an embodiment of the present application;
Fig. 2 is a schematic structural diagram of another charge control device according to an embodiment of the present application;
Fig. 3 is a schematic structural diagram of a charging module according to an embodiment of the present application;
Fig. 4 is a schematic structural diagram of a voltage conversion module according to an embodiment of the present application;
FIG. 5 is a schematic diagram of another voltage conversion module according to an embodiment of the present application;
Fig. 6 is a schematic diagram of an ETA5050VOS2F chip according to an embodiment of the present application;
FIG. 7 is a schematic diagram of a control module according to an embodiment of the present application;
FIG. 8 is a schematic diagram of an FR8018HA chip according to an embodiment of the application;
Fig. 9 is a schematic structural view of a buzzer module according to an embodiment of the present application;
fig. 10 is a schematic diagram of a barbecue thermometer according to an embodiment of the present application.
Detailed Description
In order to enable those skilled in the art to better understand the present application, the following description will make clear and complete descriptions of the technical solutions according to the embodiments of the present application with reference to the accompanying drawings.
The embodiment of the application discloses a charging control device and a thermometer, which are used for reducing cost. The following will describe in detail.
In order to better understand the embodiments of the present application, the related art of the embodiments of the present application will be described first.
With the advent of the internet of things age, wireless devices, such as wireless barbecue thermometers, are becoming increasingly popular. The tip of the wireless probe of the wireless barbecue thermometer is inserted into meat to measure the internal temperature, and the tail of the barbecue thermometer is exposed to the outside to measure the ambient temperature. The wireless barbecue thermometer needs to charge the wireless probe, and the wireless probe can be placed on the charging seat for charging, and the wireless probe is provided with the charging seat. The wireless barbecue thermometer can determine whether the wireless probe is full by monitoring the current flowing through the wireless probe, but a current detection chip is required to measure the current of the wireless probe. And the current detection chip is an integrated chip, so that the required cost is high.
In order to solve the problems, the application designs a charging control device which comprises a voltage conversion module, a charging module and a control module, wherein the charging module comprises a first charging seat, a second charging seat, a first resistor and a second resistor, the voltage conversion module is respectively connected with the charging module, a first end of the control module and a battery, a second end, a third end, a fourth end and a fifth end of the control module are respectively connected with the charging module, one end of the first resistor is respectively connected with the first charging seat and the second end of the control module, one end of the second resistor is respectively connected with the second charging seat and the third end of the control module, the other end of the first resistor and the other end of the second resistor are respectively grounded, the first charging seat and the second charging seat are respectively connected with a charged device, the voltage conversion module is used for converting first direct current provided by the battery into second direct current with preset voltage, the second direct current is used for supplying power for the charging module and the control module, the charging module is used for charging the charged device, the control module is used for detecting the voltage drop of the first resistor and the second resistor, the voltage drop of the second resistor is respectively connected with the second end of the first resistor, one end of the second resistor is respectively connected with the second end of the second resistor, the other end of the second resistor, the first resistor is respectively grounded, the first resistor and the second resistor is connected with the second resistor. Therefore, the voltage drop of the two resistors can be measured firstly, and then the current flowing through the charged device can be determined according to the voltage drop of the two resistors, namely, the current flowing through the charged device can be determined only by the two resistors, a special integrated chip is not needed, and the cost of the charging control device can be reduced.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a charging control device according to an embodiment of the application. As shown in fig. 1, the charge control device may include a voltage conversion module, a charging module, and a control module, and the charging module may include a first charging stand J1, a second charging stand J2, a first resistor R1, and a second resistor R2.
The voltage conversion module is connected with the charging module, the first end of the control module and the battery respectively, the second end, the third end, the fourth end and the fifth end of the control module are connected with the charging module respectively, one end of the first resistor R1 is connected with the first charging seat J1 and the second end of the control module respectively, one end of the second resistor R2 is connected with the second charging seat J2 and the third end of the control module respectively, the other end of the first resistor R1 and the other end of the second resistor R2 are connected with the ground end respectively, and the first charging seat J1 and the second charging seat J2 are connected with a charged device respectively.
Because the voltage provided by the battery may be different from the operating voltage required by the charging module and the control module, the battery cannot directly power the charging module and the control module. In order to ensure that the charging module and the control module can work normally, the voltage conversion module can convert the first direct current provided by the battery into the second direct current with preset voltage, and then the second direct current can be used for supplying power for the charging module and the control module.
The preset voltage is the working voltage required by the charging module and the control module. The preset voltage may be, for example, 3.3V.
The charging module may charge the charged device. Specifically, the charging module may charge the charged device according to or using the second direct current.
One of the first charging seat J1 and the second charging seat J2 is a positive electrode, and the other charging seat is a negative electrode. Therefore, when the first charging stand J1 and the second charging stand J2 are both connected to the charged device, the first charging stand J1 and the second charging stand J2 can communicate with each other through the charged device, and a current flows through the first resistor R1 and the second resistor R2. In the case where the first charging stand J1 and the second charging stand J2 are not both connected to the charged device, that is, the first charging stand J1 and the second charging stand J2 are not both connected to the charged device, or the first charging stand J1 (or the second charging stand J2) is connected to the charged device, and the second charging stand J2 (or the first charging stand J1) is not connected to the charged device, the first charging stand J1 and the second charging stand J2 are in an open state, and no current flows through the first resistor R1 and the second resistor R2.
In the case that the charging module does not charge the charged device, the voltage drop of the first resistor R1 and the voltage drop of the second resistor R2 are both 0. In the case that the charging module charges the charged device, the voltage drop of the first resistor R1 and the voltage drop of the second resistor R2 are both greater than 0. Accordingly, the control module may determine whether the charging module is in a charged state according to the voltage drops of the first resistor R1 and the second resistor R2. In the case where the voltage drop of the first resistor R1 and the second resistor R2 is greater than 0, the control module may determine that the charging module is in a charged state. In the case where the voltage drop of the first resistor R1 and the second resistor R2 is equal to 0, the control module may determine that the charging module is not in the charged state.
During the charging state of the charging module, the control module may detect the voltage drop of the first resistor R1 and the voltage drop of the second resistor R2, and then determine the current flowing through the charged device according to the voltage drop of the first resistor R1 and the voltage drop of the second resistor R2, so as to control the charging state of the charging module according to the current flowing through the charged device.
The first resistor R1 and the second resistor R2 are sampling resistors. For example, the values of the first resistor R1 and the second resistor R2 may range from 10Ω to 15Ω. The specific values of the first resistor R1 and the second resistor R2 can be determined empirically, by measurement, etc.
The voltage drop of the first resistor R1 is the product of the resistance value of the first resistor R1 and the current flowing through the first resistor R1. Because one end of the first resistor R1 is connected to the second end of the control module, the other end of the first resistor R1 is grounded, and thus the voltage detected by the second end of the control module is the voltage drop of the first resistor R1.
Similarly, the voltage drop of the second resistor R2 is the product of the resistance of the second resistor R2 and the current flowing through the second resistor R2. The voltage detected by the third end of the control module is the voltage drop of the second resistor R2.
It can be seen that the control module can directly detect the voltage drop of the first resistor R1 and the voltage drop of the second resistor R2.
The charging state of the charging module can be a fast charging state or a slow charging state. The fast charge state is a fast charge state. The slow charge state is a slow charge state. The current flowing through the charged device in the fast charging state is greater than the current flowing through the charged device in the slow charging state.
Since the charged device is connected to the first charging seat J1 and the second charging seat J2 respectively, the absolute value of the difference between the voltage drop of the first resistor R1 and the voltage drop of the second resistor R2 is the voltage drop of the charged device. Since the resistance of the charged device is known, the current flowing through the charged device can be determined according to the voltage drop of the charged device and the resistance of the charged device.
Therefore, the control module can firstly measure the voltage drop of two sampling resistors in the charging module, and then can determine the current flowing through the charged device according to the voltage drop of the two resistors, namely, the current flowing through the charged device can be determined only by the two resistors, a special integrated chip is not needed, and the cost of the charging control device can be reduced. In addition, the control module can control the charging state of the charging module according to the current flowing through the charged device, so that the charged device can use large current for charging under the condition that the charged device needs large current for charging, and can use small current for charging under the condition that the charged device does not need large current for charging, thereby realizing the flexibility of charging, quick charging and overshoot prevention, and saving power consumption.
In some embodiments, the control module controls the charging module to be in a slow charging state if the current flowing through the charged device is less than or equal to a first current threshold, and controls the charging module to be in a fast charging state if the current flowing through the charged device is greater than the first current threshold and less than a second current threshold.
During the process that the charging module charges the charged device, the current flowing through the charged device is not fixed, but varies along with the variation of the electric quantity of the charged device. As the charge of the charged device increases, the current flowing through the charged device decreases. When the charged device is full of electricity, the current flowing through the charged device is a first current threshold.
If the charged device is immediately stopped after the charged device is fully charged, and the charged device consumes power without being used by the user, the power of the fully charged device is consumed when the user uses the charged device. Therefore, after the electric quantity of the charged device is full, the charged device can be continuously charged by using small current, the electric quantity consumed by the charged device can be supplemented, the charged device is kept in a full state all the time, and the condition that the electric quantity is not full due to the fact that the charged device consumes electricity when a user uses the charged device can be avoided.
Under the condition that the current flowing through the charged device is smaller than or equal to a first current threshold value, the charged device is fully charged, the control module can control the charging module to be in a slow charging state, the charged device is continuously charged by using small current, the condition that the charged device is not fully charged due to power consumption can be avoided, overshoot can be prevented, and power consumption can be saved. Under the condition that the current flowing through the charged device is larger than the first current threshold and smaller than the second current threshold, the charged device is not fully charged, the control module can control the charging module to be in a quick charging state, and the charged device is charged by using large current, so that the quick charging of the charged device can be realized.
Therefore, the control module controls the charging module to be in a fast charging state or a slow charging state according to the current flowing through the charged device, so that the flexibility of charging can be realized, the fast charging of the charged device can be realized, the condition that the charged device is not full due to power consumption after being fully charged can be avoided, and the overcharging of the charged device can be avoided.
In some embodiments, the control module controls the charging module to stop charging the charged device if a state in which the current flowing through the charged device is greater than or equal to the second current threshold is maintained for a preset period of time.
In the case of a short circuit between the first charging stand J1 and the second charging stand J2, the current flowing through the charged module, which is determined by the control module, is large, and if the charging module charges with this current for a long time, the battery may burn out. For example, in the case where metal drops carelessly on the first charging stand J1 and the second charging stand J2, the first charging stand J1 and the second charging stand J2 will be short-circuited by the metal.
When the current flowing through the charged device is determined to be greater than or equal to the second current threshold by the control module, the control module can monitor the duration of the current greater than or equal to the second current threshold, and when the duration of the current greater than or equal to the second current threshold is monitored to be the preset duration, the condition that the duration of the current greater than or equal to the second current threshold is monitored to be the preset duration indicates that the first charging seat J1 and the second charging seat J2 are short-circuited, the control module can control the charging module to stop charging the charged device, burning of the battery due to overlarge current can be avoided, and therefore safety of the battery can be improved.
The first resistor R1 and the second resistor R2 also have a current limiting effect. In the event of a short circuit between the first and second charging seats J1 and J2, the first and second resistors R1 and R2 may limit the current flowing through the first and second charging seats J1 and J2 to a third threshold current.
For example, the first threshold current may be 1 mA, the second threshold current may be 200mA, the third threshold current may be 220mA, and the preset duration may be 3 seconds.
It should be appreciated that the foregoing is an exemplary illustration of the values of the first threshold current, the second threshold current, the third threshold current, and the preset duration, and is not limiting of the values of the first threshold current, the second threshold current, the third threshold current, and the preset duration.
In some embodiments, the battery may include a thermistor coupled to a sixth end of the control module.
The control module detects the voltage drop of the thermistor, determines the temperature of the battery according to the voltage drop of the thermistor, and controls the charging module to stop charging the charged device when the temperature of the battery is greater than or equal to a first temperature threshold value, and controls the charging module to charge the charged device when the temperature of the battery is less than a second temperature threshold value, wherein the second temperature threshold value is smaller than the first temperature threshold value.
The thermistor may be a negative temperature coefficient (Negative Temperature Coefficient, NTC) thermistor.
The resistance of the thermistor changes with a change in temperature. The resistance of the thermistor of the NTC decreases with an increase in temperature, and thus the current of the thermistor of the NTC increases with an increase in temperature, and the voltage drop of the thermistor of the NTC decreases with an increase in temperature.
The heat generation amount of the battery is proportional to the square of the operating current of the battery. Therefore, the larger the operating current of the battery, the larger the heat generation amount of the battery. In the case where the heat generation amount of the battery is larger than the heat dissipation amount of the battery, the temperature of the battery will rise, and if the temperature of the battery is too high, the battery will be burned out.
The control module can detect the voltage drop of the thermistor through the sixth end, then can determine the resistance value of the thermistor according to the voltage drop of the thermistor, and then can determine the temperature corresponding to the resistance value of the thermistor according to the corresponding relation between the resistance value of the thermistor and the temperature, so as to obtain the temperature of the battery. In the case where the temperature of the battery is greater than or equal to the first temperature threshold, it is indicated that the temperature of the battery is high, and if the battery continues to operate, the battery may burn out due to the excessive temperature. Therefore, in order to avoid burning out the battery due to overhigh temperature, the control module can control the charging module to stop charging the charged device, so that the working current of the battery can be reduced, and the temperature of the battery is reduced. In the case where the temperature of the battery is less than the second temperature threshold, indicating that the temperature of the battery is low, or that the temperature of the battery has dropped, the control module may control the charging module to continue charging the charged device. The second temperature threshold is less than the first temperature threshold.
For example, the first temperature threshold may be 45 ° and the second temperature threshold may be 30 °.
In some embodiments, referring to fig. 2, fig. 2 is a schematic structural diagram of another charging control device according to an embodiment of the present application. The charge control device shown in fig. 2 is optimized by the charge control device shown in fig. 1. As shown in fig. 2, the charging control device may further include a buzzer module, where the buzzer module is connected to the seventh end of the control module and the voltage conversion module, respectively.
The voltage conversion module can also use the second direct current to supply power for the buzzer module so as to ensure the normal work of the buzzer module.
The control module sends a first control signal to the buzzer module when the current flowing through the charged device is equal to a first current threshold value, and sends a second control signal to the buzzer module when the state of the current flowing through the charged device is greater than or equal to a second current threshold value is maintained for a preset period of time.
The buzzer module can output first prompt information according to the first control signal and can output second prompt information according to the second control signal.
In the case where the current flowing through the charged device is equal to the first current threshold, indicating that the charged device is fully charged, the control module may send a first control signal to the buzzer module. After the buzzer module receives the first control signal from the control module, the buzzer module can output first prompt information according to the first control signal, can remind a user that the charging device is fully charged, and can improve user experience.
The first control signal may be, for example, a loud 3-sound control signal. The first prompt may be loud 3.
In case that the state where the current flowing through the charged device is greater than or equal to the second current threshold value is maintained for a preset period of time, indicating that the first and second charging seats J1 and J2 are shorted, the control module may transmit a second control signal to the buzzer module. After the buzzer module receives the second control signal from the control module, the buzzer module can output second prompt information according to the second control signal, and can remind a user that the first charging seat J1 and the second charging seat J2 are short-circuited, so that the user can check the first charging seat J1 and the second charging seat J2, the short-circuit problem of the first charging seat J1 and the second charging seat J2 is solved, and the user experience can be improved.
The second control signal may be, for example, a control signal that continuously alarms. The second prompt may be a sustained alarm.
In some embodiments, referring to fig. 3, fig. 3 is a schematic structural diagram of a charging module according to an embodiment of the application. As shown in fig. 3, the charging module may further include a first switching device Q1, a second switching device Q2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a first capacitor C1, a second capacitor C2, a first diode D1, and a second diode D2.
The first end of the first switching device Q1 is respectively connected with one end of the third resistor R3, one end of the first capacitor C1 and one end of the fourth resistor R4, the second end of the first switching device Q1 is respectively connected with the other end of the third resistor R3, the other end of the first capacitor C1 and the voltage conversion module, the other end of the fourth resistor R4 is connected with the fourth end of the control module, the third end of the first switching device Q1 is respectively connected with one end of the second capacitor C2, one end of the fifth resistor R5, one end of the seventh resistor R7 and the second end of the second switching device Q2, the first end of the second switching device Q2 is respectively connected with the other end of the second capacitor C2, the other end of the fifth resistor R5 and one end of the sixth resistor R6, the other end of the sixth resistor R6 is connected with the fifth end of the control module, the first end of the second switching device Q2 is respectively connected with the other end of the seventh resistor R7, the positive electrode of the first diode D1 and the positive electrode of the second diode D2, the negative electrode of the first diode D1 is connected with the second charging seat J1, and the negative electrode of the second diode D2 is connected with the second J2.
The control module may control on or off of the first switching device Q1 through the fourth terminal. The control module may control on or off of the second switching device Q2 through the fifth terminal.
The first switching device Q1 and the second switching device Q2 may be P-type metal oxide semiconductor (Metal Oxide Semiconductor, MOS), or may be other switching devices having other equivalent functions. The first switching device Q1 and the second switching device Q2 may be insulated gate bipolar transistors (Insulated Gate Bipolar Transistor, IGBTs), for example.
Under the condition that the first charging seat J1 and the second charging seat J2 are respectively connected with the charged device, the control module can control the charging module to charge the charged device by controlling the first switching device Q1 to be conducted through the fourth terminal, and can control the charging module to stop charging the charged device by controlling the first switching device Q1 to be turned off through the fourth terminal.
The control module can control the charging module to be in a slow charging state by controlling the first switching device Q1 to be turned on through the fourth end and controlling the second switching device Q2 to be turned off through the fifth end. At this time, the charging loop passes through the first switching device Q1 and the seventh resistor R7. The seventh resistor R7 has a current limiting function, and can limit the charging current of the charged device. The resistance value of the seventh resistor R7 is 300 omega-620 omega. For example, the resistance of the seventh resistor R7 may have a value of 510 Ω.
The control module can control the charging module to be in a fast charging state by controlling the first switching device Q1 to be conducted through the fourth end and controlling the second switching device Q2 to be conducted through the fifth end. At this time, the charging loop passes through the first switching device Q1 and the second switching device Q2.
The first capacitor C1 and the second capacitor C2 have a slow start function. When the control module controls the first switching device Q1 to be conducted through the fourth terminal, the voltage conversion module can charge the first capacitor C1, the voltage Vgs between the grid electrode and the source electrode gradually drops, and when the Vgs drops to the conducting voltage of the PMOS tube, the first switching device Q1 is conducted. It can be seen that the first switching device Q1 is not turned on immediately, but the on time of the first switching device Q1 may be delayed as the voltage Vgs between the gate and the source drops to the on voltage of the PMOS transistor due to the charging of the first capacitor C1. In addition, the first switching device Q1 is turned on slowly, and the output voltage of the first switching device Q1 also rises slowly, so that the rising edge is gentle, the surge input current can be suppressed, and the charging control device can be effectively protected.
Similarly, when the first switching device Q1 is turned on and the control module controls the second switching device Q2 to be turned on through the fifth end, the voltage conversion module may charge the second capacitor C2 through the first switching device Q1, and the voltage Vgs between the gate and the source gradually decreases, and when the Vgs decreases to the on voltage of the PMOS transistor, the second switching device Q2 is turned on. It can be seen that the second switching device Q2 is not turned on immediately, but the on time of the second switching device Q2 may be delayed as the voltage Vgs between the gate and the source drops to the on voltage of the PMOS transistor due to the charging of the second capacitor C2. In addition, the second switching device Q2 is turned on slowly, and the output voltage of the second switching device Q2 also rises slowly, so that the rising edge is gentle, the surge input current can be suppressed, and the charging control device can be effectively protected.
The third resistor R3 may ensure that the first switching device Q1 is in an off state. For example, during the power-on process of the charging control device, the third resistor R3 may ensure that the voltage Vgs between the gate and the source is greater than the on-voltage of the PMOS transistor, and may ensure that the first switching device Q1 is in an off state.
Similarly, the fifth resistor R5 may ensure that the second switching device Q2 is in an off state. For example, during the power-on process of the charging control device, the fifth resistor R5 may ensure that the voltage Vgs between the gate and the source is greater than the on-voltage of the PMOS transistor, and may ensure that the second switching device Q2 is in an off state.
The fourth resistor R4 and the sixth resistor R6 have a current limiting effect.
The first diode D1 and the second diode D2 may be schottky diodes, and have an effect of preventing current from flowing backward. The first diode D1 and the second diode D2 can prevent that the external larger power supply is carelessly placed on the first charging seat J1 and the second charging seat J2, and the current flows backward, so that the battery, the voltage conversion module and the control module burn out due to the current flowing.
The first charging seat J1 and the second charging seat J2 can be charging spring plates, and the charged device can be clamped on the charging spring plates for charging. The first charging seat J1 and the second charging seat J2 may be sockets, and the charged device may be plugged into the sockets for charging. The first charging stand J1 and the second charging stand J2 may have other modules with the same function.
In the case where the first charging seat J1 and the second charging seat J2 are charging spring plates, a short circuit between the first charging seat J1 and the second charging seat J2 may be caused when the metal kitchen ware drops onto the first charging seat J1 and the second charging seat J2 carelessly.
In some embodiments, referring to fig. 4, fig. 4 is a schematic structural diagram of a voltage conversion module according to an embodiment of the application. As shown in fig. 4, the voltage conversion module may include a first filter circuit, a second filter circuit, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, and a voltage conversion circuit.
The first filter circuit is respectively connected with the first end of the battery, one end of the eighth resistor R1 and the first end of the voltage conversion circuit, the other end of the eighth resistor R1 is respectively connected with one end of the ninth resistor R9 and the second end of the voltage conversion circuit, the third end of the voltage conversion circuit is respectively connected with one end of the tenth resistor R10, the second filter circuit, the first end of the charging module and the first end of the control module, and the other end of the tenth resistor R10 is connected with the second end of the battery.
After the first direct current provided by the battery is input into the voltage conversion module, the first filtering circuit can filter the first direct current to obtain a third direct current, then the voltage conversion circuit can perform voltage conversion on the third direct current to obtain a fourth direct current with preset voltage, and then the second filtering circuit can filter the fourth direct current to obtain a second direct current.
The first filtering circuit filters the first direct current, so that the stability of the third direct current of the input voltage conversion circuit can be ensured. The second filter circuit filters the fourth direct current, so that the stability of the second direct current of the output voltage conversion module can be ensured, and the normal operation of the charging module and the control module can be ensured.
The eighth resistor R8 and the ninth resistor R9 can divide the voltage of the first direct current provided by the battery, so that the voltage of the third direct current input into the voltage conversion circuit is smaller than the voltage of the first direct current, the voltage conversion circuit can be ensured to be incapable of working under the conditions of excessively low and unstable battery voltage, and the condition of continuous discharge under the condition of no power of the battery can be avoided.
The tenth resistor R10 is a pull-up resistor, one end of the tenth resistor R10 is connected with the output end of the voltage conversion module, the other end of the tenth resistor R10 is connected with one end of a thermistor in the battery, and the other end of the thermistor is connected with the ground end. The tenth resistor R10 is connected in series with the thermistor. It can be seen that the power supply of the tenth resistor R10 is a voltage conversion module.
The control module may detect the voltage drop of the thermistor through the sixth end, and then may calculate a difference between the preset voltage and the voltage drop of the thermistor to obtain the voltage drop of the tenth resistor R10. Since the resistance value of the tenth resistor R10 is known, the ratio of the voltage drop of the tenth resistor R10 to the resistance value of the tenth resistor R10 can be calculated, resulting in a current flowing through the tenth resistor R10. Since the tenth resistor R10 is connected in series with the thermistor, the current flowing through the thermistor is the current flowing through the tenth resistor R10. The control module can calculate the ratio of the voltage drop of the thermistor to the current flowing through the thermistor to obtain the resistance of the thermistor, and then can determine the temperature corresponding to the resistance of the thermistor according to the corresponding relation between the resistance of the thermistor and the temperature to obtain the temperature of the battery.
In some embodiments, referring to fig. 5, fig. 5 is a schematic diagram illustrating a structure of another voltage conversion module according to an embodiment of the application. The voltage conversion module shown in fig. 5 is optimized by the voltage conversion module shown in fig. 4. As shown in fig. 5, the voltage conversion module may further include a third capacitor C3.
One end of the third capacitor C3 is connected with one end of the ninth resistor R9, and the other end of the third capacitor C3 is connected with the ground.
The third capacitor C3 has a slow start function. For example, when the charge control device is powered on, the battery may be charged through the eighth resistor R8, so that the voltage drop across the third capacitor C3 is increased, and in the case that the voltage drop across the third capacitor C3 is equal to the operating voltage of the voltage conversion circuit, the voltage conversion circuit will perform voltage conversion. It can be seen that the voltage conversion circuit does not operate immediately, but rather the voltage drop increases to the operating voltage of the voltage conversion circuit as the third capacitor C3 is charged, so that the operating time of the voltage conversion circuit can be delayed.
The third capacitor C3 also has a filtering function, and can filter out high-frequency noise.
In some embodiments, as shown in fig. 5, the first filter circuit may include a fourth capacitor C4 and a fifth capacitor C5, and the second filter circuit may include a sixth capacitor C6 and a seventh capacitor C7.
One end of the fourth capacitor C4 and one end of the fifth capacitor C5 are respectively connected with one end of the eighth resistor R8, and the other end of the fourth capacitor C4 and the other end of the fifth capacitor C5 are respectively connected with the ground.
One end of the sixth capacitor C6 and one end of the seventh capacitor C7 are respectively connected to the third end of the voltage conversion circuit, and the other end of the sixth capacitor C6 and the other end of the seventh capacitor C7 are respectively connected to the ground.
The fourth capacitor C4 can filter out low frequency noise. The fifth capacitor C5 can filter out high frequency noise. The capacitance of the fourth capacitor C4 is larger than the capacitance of the fifth capacitor C5. Illustratively, the capacitance of the fourth capacitor C4 may be of the uF order, and the capacitance of the fifth capacitor C5 may be nF. For example, the fourth capacitor C4 may have a capacitance of 22uF, and the fifth capacitor C5 may have a capacitance of 100nF.
The sixth capacitor C6 can filter out high frequency noise. The seventh capacitor C7 can filter out low frequency noise. The capacitance of the seventh capacitor C7 is larger than the capacitance of the sixth capacitor C6. Illustratively, the capacitance of the seventh capacitor C7 may be of uF order, and the capacitance of the sixth capacitor C6 may be nF. For example, the capacitance value of the seventh capacitor C7 may be 22uF, and the capacitance value of the sixth capacitor C6 may be 100nF.
After the direct current output by the voltage conversion circuit is filtered by the sixth capacitor C6 and the seventh capacitor C7, stable voltage can be provided for the charging module and the control module.
In some embodiments, as shown in fig. 5, the voltage conversion circuit may include a voltage conversion chip U1, an eleventh resistor R11, and a twelfth resistor R12.
The first end of the voltage conversion chip U1 is connected with one end of the eighth resistor R8, the second end of the voltage conversion chip U1 is connected with the other end of the eighth resistor R8, the third end of the voltage conversion chip U1 is respectively connected with one end of the eleventh resistor R11 and the second filter circuit, the fourth end of the voltage conversion chip U1 is respectively connected with the other end of the eleventh resistor R11 and one end of the twelfth resistor R12, and the other end of the twelfth resistor R12 is connected with the ground end.
The first end of the voltage conversion chip U1 is a first end of the voltage conversion circuit, the second end of the voltage conversion chip U1 is a second end of the voltage conversion circuit, and the third end of the voltage conversion chip U1 is a third end of the voltage conversion circuit.
The voltage conversion chip U1 may perform voltage conversion on the third dc to obtain a fifth dc, and the eleventh resistor R11 and the twelfth resistor R12 may perform voltage adjustment on the fifth dc to obtain a fourth dc. The eleventh resistor R11 outputs a voltage of. Wherein, As the output voltage of the fourth terminal of the voltage conversion chip U1,Is the resistance value of the eleventh resistor R11,The resistance of the twelfth resistor R12.
In the case where the voltage conversion chip U1 is fixed, the resistance values of the eleventh resistor R11 and the twelfth resistor R12 may be determined according to a preset voltage.
The voltage conversion chip U1 can be a Low-dropout regulator (LDO-dropout regulator), can be a BUCK BUCK chip, can be a discrete device decompression voltage stabilizing source, and can be other chips with the same function.
For example, the voltage conversion chip U1 may be a chip of the type ETA5050VOS 2F. Referring to fig. 6, fig. 6 is a schematic diagram of an ETA5050VOS2F chip according to an embodiment of the present application. As shown in fig. 6, the first end of the voltage conversion chip U1 is the VIN pin of the ETA5050VOS2F chip, the second end of the voltage conversion chip U1 is the EN pin of the ETA5050VOS2F chip, the third end of the voltage conversion chip U1 is the OUT pin of the ETA5050VOS2F chip, and the fourth end of the voltage conversion chip U1 is the NC/FB pin of the ETA5050VOS2F chip. The GND pin of ETA5050VOS2F chip is connected with ground.
It should be appreciated that the foregoing is an exemplary illustration of the voltage conversion chip U1, and is not intended to limit the model of the voltage conversion chip U1.
In some embodiments, referring to fig. 7, fig. 7 is a schematic structural diagram of a control module according to an embodiment of the present disclosure. As shown in fig. 7, the control module may include a control chip U2, a crystal oscillator Y, a thirteenth resistor R13, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, and an inductor L.
The first end of the control chip U2 is respectively connected with one end of the eighth capacitor C8 and the first end of the crystal oscillator Y, the second end of the control chip U2 is respectively connected with one end of the ninth capacitor C9 and the second end of the crystal oscillator Y, the third end of the control chip U2 is connected with one end of the thirteenth resistor R13, the fourth end of the control chip U2 is connected with one end of the tenth capacitor C10, the fifth end of the control chip U2 is respectively connected with one end of the eleventh capacitor C11, one end of the twelfth capacitor C12 and the voltage conversion module, the sixth end of the control chip U2 is connected with one end of the inductor L, the seventh end of the control chip U2 is respectively connected with the other end of the inductor L, one end of the thirteenth capacitor C13 and one end of the fourteenth capacitor C14, the other end of the eighth capacitor C8, the other end of the ninth capacitor C9, the third end of the crystal oscillator Y, the fourth end of the crystal oscillator Y, the other end of the tenth capacitor C10, the other end of the eleventh capacitor C11, the other end of the twelfth capacitor C12, the other end of the thirteenth capacitor C13, the other end of the fourteenth capacitor C14 and the other end of the thirteenth resistor R13 are respectively connected with a ground end, the eighth end of the control chip U2 is the second end of the control module, the ninth end of the control chip U2 is the third end of the control module, the tenth end of the control chip U2 is the fourth end of the control module, the tenth end of the control chip U2 is the fifth end of the control module, the twelfth end of the control chip U2 is the sixth end of the control module, and the tenth end of the control chip U2 is the seventh end of the control module.
The control chip U2 has a function of a control module, which is not described herein.
The control Chip U2 may be a microcontroller (Micro Control Unit, MCU), a central controller (Central Processing Unit, CPU), a Bluetooth (BT) System On Chip (SOC), or a WIFI SOC.
The control chip U2 may be a chip of the model FR8018HA, for example. Referring to fig. 8, fig. 8 is a schematic diagram of an FR8018HA chip according to an embodiment of the application. As shown in fig. 8, the first end of the control chip U2 is the XTALO _24m pin of the FR8018HA chip, the second end of the control chip U2 is the XTALI _24m pin of the FR8018HA chip, the third end of the control chip U2 is the RSTP pin of the FR8018HA chip, the fourth end of the control chip U2 is the ldo_out pin of the FR8018HA chip, the fifth end of the control chip U2 is the VBAT pin of the FR8018HA chip, the sixth end of the control chip U2 is the BSM pin of the FR8018HA chip, the seventh end of the control chip U2 is the BFB pin of the FR8018HA chip, the eighth end of the control chip U2 is the PD5 pin of the FR8018HA chip, the ninth end of the control chip U2 is the PD6 pin of the FR8018HA chip, the tenth end of the control chip U2 is the PB 8018HA chip, the tenth end of the control chip U2 is the PA1 pin of the FR8018HA chip, the twelfth end of the control chip U2 is the PB 8018HA chip, and the tenth end of the control chip U2 is the PD 8018HA chip.
It should be appreciated that the foregoing is an exemplary illustration of the control chip U2, and is not intended to limit the model of the control chip U2.
The crystal oscillator Y is a passive crystal oscillator. The crystal oscillator Y, the eighth capacitor C8 and the ninth capacitor C9 together generate clock signals for the control chip U2.
The second direct current input by the voltage conversion module is filtered by the eleventh capacitor C11 and the twelfth capacitor C12 to provide a stable working voltage for the control chip U2. One of the eleventh capacitor C11 and the twelfth capacitor C12 may filter out high frequency noise, and the other may filter out low frequency noise.
The thirteenth resistor R13 is a pull-down resistor. The thirteenth resistor R13 can prevent the control chip U2 from being reset by suddenly high level when the reset pin of the control chip U2 is kept at low level at the moment of power-on, surge input and electrostatic discharge (Electro-STATIC DISCHARGE, ESD).
The thirteenth capacitor C13 and the fourteenth capacitor C14 are used for filtering. One of the thirteenth capacitor C13 and the fourteenth capacitor C14 may filter out high frequency noise, and the other may filter out low frequency noise.
The inductor L may be a laminated inductor or other inductors.
The thirteenth capacitor C13, the fourteenth capacitor C14 and the inductor L may step down the Direct Current (DC) Input to the control chip U2 through Direct Current (DC) -DC, and Output the DC to other Input Output (IO) ports of the control chip U2.
The tenth capacitor C10 has a filtering function. The tenth capacitor C10 can output a stable voltage to supply power to peripheral devices of the control chip U2 from the dc power input to the control chip U2 through the low dropout linear regulator.
In some embodiments, referring to fig. 9, fig. 9 is a schematic structural diagram of a buzzer module according to an embodiment of the present disclosure. As shown in fig. 9, the buzzer module may include a third switching tube Q3, a buzzer B, a third diode D3, a fourteenth resistor R14, and a fifteenth resistor R15.
The first end of the third switching tube Q3 is respectively connected with one end of the fourteenth resistor R14 and one end of the fifteenth resistor R15, the other end of the fourteenth resistor R14 is connected with the seventh end of the control module, the second end of the third switching tube Q3 and the other end of the fifteenth resistor R15 are respectively connected with the ground end, the third end of the third switching tube Q3 is respectively connected with one end of the buzzer B and the positive electrode of the third diode D3, and the other end of the buzzer B is respectively connected with the negative electrode of the third diode D3 and the voltage conversion module.
The fourteenth resistor R14 has a current limiting function, and can prevent the current from being excessively large.
The fifteenth resistor R15 is a pull-down resistor, and has functions of ensuring a default state, improving noise margin, and preventing malfunction.
The third switching transistor Q3 may be a triode, such as an npn-type triode, or may be another semiconductor switching device having the same function.
The control module can control the on and off of the third switching tube Q3 through the seventh end, and then can control the on and off of the buzzer B, so that the buzzer B can make corresponding sound after receiving corresponding frequency, and corresponding prompt information is output. In the case that the control module controls the third switching tube Q3 to be turned on through the seventh end, the buzzer B is turned on. In the case that the control module controls the third switching tube Q3 to be turned off through the seventh end, the buzzer B is turned off.
The first control signal may be a pulse width modulated (Pulse Width Modulation, PWM) signal, for example. When the first control signal is at a high level, the third switching tube Q3 is turned on, so that the buzzer B is turned on to make a sound to remind the user that the charging device is fully charged.
The second control signal may be, for example, high. Under the condition that the state that the current flowing through the charged device is greater than or equal to the second current threshold value is maintained for a preset period of time, the second control signal can enable the third switch tube Q3 to be conducted, and then enable the buzzer B to be conducted to continuously make sounds, so that a user is reminded of being short-circuited by the charged device, and the user is reminded of being checked.
The third diode D3 is used to protect the buzzer B. In the case that the buzzer B is a passive buzzer, if the buzzer B is switched from on to off, that is, the third switching tube Q3 is switched from on to off, due to the inductance characteristic, the coil in the buzzer B may generate a reverse electromotive force (i.e., a counter electromotive force), and this high voltage may damage other components in the buzzer B, and a diode is connected in parallel to two ends of the buzzer B, so as to provide a bleed path for this reverse electromotive force. When the current of the buzzer B is suddenly interrupted, the third diode D3 is conducted, so that the residual energy in the coil in the buzzer B is allowed to form a loop through the third diode D3 and is consumed in the form of heat energy, and the sensitive elements in the buzzer B are protected from the impact of high-voltage spikes. Thus, a smooth drop in current can be ensured, so that possible faults can be avoided.
In some embodiments, the charge control device described above may be applied to a barbecue thermometer.
Barbecue is a delicacy that people like, and the different meats may need different baking temperatures. Even with the same meat, the doneness that different users like may be different, so different meat grills need to be grilled with different grilling temperatures. In order to solve the above problems, there is a need for a barbecue thermometer that can monitor the temperature inside meat. Illustratively, the barbecue thermometer may be shaped like a steel needle that may be inserted into the interior of the meat to detect the temperature within the meat so that the meat's cooking state and/or doneness may be determined by the temperature within the meat.
Referring to fig. 10, fig. 10 is a schematic diagram illustrating a barbecue thermometer according to an embodiment of the present application. As shown in fig. 10, the barbecue thermometer may include a wireless probe and a charge control device. The charge control device may include a buzzer. The barbecue thermometer may also include a display device. The charging control device is connected with the display device. The wireless probe can be inserted into the meat for detecting the temperature inside the meat, and the detected temperature of the meat can be transmitted to the charging control device in a wireless mode. The charge control device may send the received temperature to the display device. The display device may display the temperature inside the meat. Under the condition that the temperature in the meat reaches the preset temperature, the charging control device can control the buzzer to work so as to prompt the user that the meat is roasted. The preset temperature is the temperature set by the user according to the needs.
It should be understood that the above is an exemplary illustration of the structure of a barbecue thermometer and is not intended to be limiting. Illustratively, the barbecue thermometer may further include a temperature setting portion.
It should be understood that the connection of the present application may be understood as an electrical connection.
It is to be understood that in various embodiments, identical or corresponding information may be referred to with respect to each other.
It should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the above-mentioned embodiments, it will be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or replacements do not drive the essence of the corresponding technical solution to deviate from the spirit and scope of the technical solution of the embodiments of the present application.

Claims (12)

1. The charging control device is characterized by comprising a voltage conversion module, a charging module and a control module, wherein the charging module comprises a first charging seat, a second charging seat, a first resistor and a second resistor;
The voltage conversion module is respectively connected with the charging module, the first end of the control module and the battery, the second end, the third end, the fourth end and the fifth end of the control module are respectively connected with the charging module, one end of the first resistor is respectively connected with the first charging seat and the second end of the control module, one end of the second resistor is respectively connected with the second charging seat and the third end of the control module, the other end of the first resistor and the other end of the second resistor are respectively grounded, and the first charging seat and the second charging seat are respectively connected with a charged device;
The voltage conversion module is used for converting the first direct current provided by the battery into a second direct current with preset voltage, and the second direct current is used for supplying power for the charging module and the control module;
The charging module is used for charging the charged device;
The control module is used for detecting the voltage drop of the first resistor and the voltage drop of the second resistor, determining the current flowing through the charged device according to the voltage drop of the first resistor and the voltage drop of the second resistor, and controlling the charging state of the charging module according to the current;
the charging module further comprises a first switching device, a second switching device, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first capacitor, a second capacitor, a first diode and a second diode, wherein:
The first end of the first switching device is respectively connected with one end of the third resistor, one end of the first capacitor and one end of the fourth resistor, the second end of the first switching device is respectively connected with the other end of the third resistor, the other end of the first capacitor and the voltage conversion module, the other end of the fourth resistor is connected with the fourth end of the control module, the third end of the first switching device is respectively connected with one end of the second capacitor, one end of the fifth resistor, one end of the seventh resistor and the second end of the second switching device, the first end of the second switching device is respectively connected with the other end of the second capacitor, the other end of the fifth resistor and one end of the sixth resistor, the other end of the sixth resistor is connected with the fifth end of the control module, the third end of the second switching device is respectively connected with the other end of the seventh resistor, the positive electrode of the first diode and the positive electrode of the second diode, the negative electrode of the first diode is connected with the negative electrode of the second diode, and the negative electrode of the second diode is connected with the charging base.
2. The charge control device according to claim 1, wherein the control module is specifically configured to control the charge module to be in a slow charge state if the current is less than or equal to a first current threshold, and to control the charge module to be in a fast charge state if the current is greater than the first current threshold and less than a second current threshold.
3. The charge control device of claim 1, wherein the control module is further configured to control the charging module to stop charging the charged device if the state of the current greater than or equal to the second current threshold is maintained for a preset period of time.
4. The charge control device of claim 1, wherein the battery includes a thermistor coupled to a sixth end of the control module;
The control module is further configured to detect a voltage drop of the thermistor, determine a temperature of the battery according to the voltage drop of the thermistor, control the charging module to stop charging the charged device when the temperature is greater than or equal to a first temperature threshold, and control the charging module to charge the charged device when the temperature is less than a second temperature threshold, where the second temperature threshold is less than the first temperature threshold.
5. The charge control device of claim 3, further comprising a buzzer module connected to a seventh end of the control module and the voltage conversion module, respectively;
The voltage conversion module is further used for supplying power to the buzzer module by using the second direct current;
the control module is further configured to send a first control signal to the buzzer module when the current is equal to a first current threshold, and send a second control signal to the buzzer module when the state of the current greater than or equal to a second current threshold is maintained for a preset period of time;
the buzzer module is used for outputting first prompt information according to the first control signal and outputting second prompt information according to the second control signal.
6. The charge control device according to any one of claims 1 to 5, wherein the voltage conversion module includes a first filter circuit, a second filter circuit, an eighth resistor, a ninth resistor, a tenth resistor, and a voltage conversion circuit;
the first filter circuit is respectively connected with the first end of the battery, one end of the eighth resistor and the first end of the voltage conversion circuit, the other end of the eighth resistor is respectively connected with one end of the ninth resistor and the second end of the voltage conversion circuit, the third end of the voltage conversion circuit is respectively connected with one end of the tenth resistor, the second filter circuit, the charging module and the first end of the control module, and the other end of the tenth resistor is connected with the second end of the battery;
The first filtering circuit is used for filtering the first direct current to obtain a third direct current;
The voltage conversion circuit is used for performing voltage conversion on the third direct current to obtain a fourth direct current;
And the second filter circuit is used for filtering the fourth direct current to obtain the second direct current.
7. The charge control device of claim 6, wherein the voltage conversion module further comprises a third capacitor, one end of the third capacitor is connected to one end of the ninth resistor, and the other end of the third capacitor is connected to a ground terminal.
8. The charge control device according to claim 6, wherein the first filter circuit includes a fourth capacitor and a fifth capacitor, and the second filter circuit includes a sixth capacitor and a seventh capacitor;
One end of the fourth capacitor and one end of the fifth capacitor are respectively connected with one end of the eighth resistor, and the other end of the fourth capacitor and the other end of the fifth capacitor are respectively connected with a ground terminal;
one end of the sixth capacitor and one end of the seventh capacitor are respectively connected with the third end of the voltage conversion circuit, and the other end of the sixth capacitor and the other end of the seventh capacitor are respectively connected with the ground end.
9. The charge control device according to claim 6, wherein the voltage conversion circuit includes a voltage conversion chip, an eleventh resistor, and a twelfth resistor;
The first end of the voltage conversion chip is connected with one end of the eighth resistor, the second end of the voltage conversion chip is connected with the other end of the eighth resistor, the third end of the voltage conversion chip is respectively connected with one end of the eleventh resistor and the second filter circuit, the fourth end of the voltage conversion chip is respectively connected with the other end of the eleventh resistor and one end of the twelfth resistor, and the other end of the twelfth resistor is connected with the ground.
10. The charge control device of claim 5, wherein the control module comprises a control chip, a crystal oscillator, a thirteenth resistor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, and an inductor;
The first end of the control chip is respectively connected with one end of the eighth capacitor and the first end of the crystal oscillator, the second end of the control chip is respectively connected with one end of the ninth capacitor and the second end of the crystal oscillator, the third end of the control chip is connected with one end of the thirteenth resistor, the fourth end of the control chip is connected with one end of the tenth capacitor, the fifth end of the control chip is respectively connected with one end of the eleventh capacitor, one end of the twelfth capacitor and the voltage conversion module, the sixth end of the control chip is connected with one end of the inductor, the seventh end of the control chip is respectively connected with the other end of the inductor, one end of the thirteenth capacitor and one end of the fourteenth capacitor, the other end of the eighth capacitor, the other end of the ninth capacitor, the third end of the crystal oscillator, the fourth end of the crystal oscillator, the other end of the tenth capacitor, the other end of the eleventh capacitor, the other end of the twelfth capacitor, the other end of the thirteenth capacitor, the other end of the fourteenth capacitor and the other end of the thirteenth resistor are respectively connected with a ground end, the eighth end of the control chip is the second end of the control module, the ninth end of the control chip is the third end of the control module, the tenth end of the control chip is the fourth end of the control module, the tenth end of the control chip is the fifth end of the control module, the twelfth end of the control chip is the sixth end of the control module, and the tenth end of the control chip is the seventh end of the control module.
11. The charge control device of claim 5, wherein the buzzer module includes a third switching tube, a buzzer, a third diode, a fourteenth resistor, and a fifteenth resistor;
The first end of the third switching tube is respectively connected with one end of the fourteenth resistor and one end of the fifteenth resistor, the other end of the fourteenth resistor is connected with the seventh end of the control module, the second end of the third switching tube and the other end of the fifteenth resistor are respectively connected with the ground end, the third end of the third switching tube is respectively connected with one end of the buzzer and the positive electrode of the third diode, and the other end of the buzzer is respectively connected with the negative electrode of the third diode and the voltage conversion module.
12. A thermometer comprising a charge control device according to any one of claims 1 to 11.
CN202411007368.0A 2024-07-25 2024-07-25 Charging control device and thermometer Active CN118539571B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202411007368.0A CN118539571B (en) 2024-07-25 2024-07-25 Charging control device and thermometer
CN202411416417.6A CN119482794A (en) 2024-07-25 2024-07-25 Charging control method of charging control device and thermometer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202411007368.0A CN118539571B (en) 2024-07-25 2024-07-25 Charging control device and thermometer

Related Child Applications (1)

Application Number Title Priority Date Filing Date
CN202411416417.6A Division CN119482794A (en) 2024-07-25 2024-07-25 Charging control method of charging control device and thermometer

Publications (2)

Publication Number Publication Date
CN118539571A CN118539571A (en) 2024-08-23
CN118539571B true CN118539571B (en) 2024-12-17

Family

ID=92384572

Family Applications (2)

Application Number Title Priority Date Filing Date
CN202411007368.0A Active CN118539571B (en) 2024-07-25 2024-07-25 Charging control device and thermometer
CN202411416417.6A Pending CN119482794A (en) 2024-07-25 2024-07-25 Charging control method of charging control device and thermometer

Family Applications After (1)

Application Number Title Priority Date Filing Date
CN202411416417.6A Pending CN119482794A (en) 2024-07-25 2024-07-25 Charging control method of charging control device and thermometer

Country Status (1)

Country Link
CN (2) CN118539571B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5861730A (en) * 1996-10-15 1999-01-19 Samsung Electronics Co., Ltd. Battery charging apparatus
WO2015032080A1 (en) * 2013-09-09 2015-03-12 吉瑞高新科技股份有限公司 Charging control method for battery pole with small battery capacity and charger thereof
CN110855024A (en) * 2019-10-18 2020-02-28 成都斯普奥汀科技有限公司 Device for controlling wireless charging output power based on PWM (pulse-width modulation) integral circuit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4246142B2 (en) * 2004-12-08 2009-04-02 パナソニック株式会社 Charger
CN104810873B (en) * 2014-01-28 2018-03-16 广东欧珀移动通信有限公司 Electronic equipment battery charge controller and method
CN209134074U (en) * 2018-10-12 2019-07-19 畅充科技（北京）有限公司 A kind of fast charge charging circuit and device
CN111682615A (en) * 2020-06-18 2020-09-18 格力博(江苏)股份有限公司 Charging control circuit, charging device and charging system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5861730A (en) * 1996-10-15 1999-01-19 Samsung Electronics Co., Ltd. Battery charging apparatus
WO2015032080A1 (en) * 2013-09-09 2015-03-12 吉瑞高新科技股份有限公司 Charging control method for battery pole with small battery capacity and charger thereof
CN110855024A (en) * 2019-10-18 2020-02-28 成都斯普奥汀科技有限公司 Device for controlling wireless charging output power based on PWM (pulse-width modulation) integral circuit

Also Published As

Publication number Publication date
CN118539571A (en) 2024-08-23
CN119482794A (en) 2025-02-18

Similar Documents

Publication Publication Date Title
US11239691B2 (en) Powering an emergency lighting system
US9148009B2 (en) Charger with over-voltage and over-current protection and method for using the same
US20100254057A1 (en) Overload power cut-off device and method thereof
CN110391688B (en) Safe and intelligent charging method
EP2869430B1 (en) Software controlled power supply and battery charger
TWI565201B (en) Switch mode power supply module and associated hiccup control method
JP2017191606A (en) Access device
US7898222B2 (en) Battery charger and associated method
AU2009303833A1 (en) Life safety device with extended shelf life
CN118539571B (en) Charging control device and thermometer
CN106936302A (en) Electronic circuit and the method for operating electronic circuit
JP2012157088A (en) Overcurrent protection device
US20080204956A1 (en) Override protection circuit device
TWI475240B (en) Power testing device and control method thereof for reducing inrush current
JP2014060881A (en) Charging circuit with protective function
CN217767280U (en) Commercial-grade CPU temperature control circuit and commercial-grade CPU
CN215895333U (en) Integrated drive type field effect circuit and electronic apparatus
WO2023151182A1 (en) Charging protection circuit and electronic atomizer
CN210774413U (en) Temperature detection circuit and power supply equipment
CN222145115U (en) Resistance value detection device and thermometer
CN217087505U (en) Switching module and electronic device
CN112531647B (en) Linear voltage-stabilized power supply circuit applied to automobile electronic controller
CN220017505U (en) Driving circuit of portable heating device
GB2470968A (en) Power supply protective terminal
TWM459600U (en) Apparatus for circuit protection

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CP03 Change of name, title or address
CP03 Change of name, title or address

Address after: 518057 3301, Building C, Lot 1, Chuangzhi Yuncheng, Liuxian Avenue, Xili Community, Xili Street, Nanshan District, Shenzhen, Guangdong

Patentee after: Shenzhen Zhiyan Technology Co.,Ltd.

Country or region after: China

Patentee after: Shenzhen Qianyan Technology Co.,Ltd.

Address before: 518057 3301, Building C, Lot 1, Chuangzhi Yuncheng, Liuxian Avenue, Xili Community, Xili Street, Nanshan District, Shenzhen, Guangdong

Patentee before: SHENZHEN ZHIYAN TECHNOLOGY Co.,Ltd.

Country or region before: China

Patentee before: Shenzhen Qianyan Technology Co.,Ltd.