CN119561198A - Battery pack and electronic equipment - Google Patents
Battery pack and electronic equipment Download PDFInfo
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- CN119561198A CN119561198A CN202411775530.3A CN202411775530A CN119561198A CN 119561198 A CN119561198 A CN 119561198A CN 202411775530 A CN202411775530 A CN 202411775530A CN 119561198 A CN119561198 A CN 119561198A
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- 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
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00034—Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- 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
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00038—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange using passive battery identification means, e.g. resistors or capacitors
- H02J7/00041—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange using passive battery identification means, e.g. resistors or capacitors in response to measured battery parameters, e.g. voltage, current or temperature profile
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- 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
-
- 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
- H02J7/00302—Overcharge protection
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- 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
- H02J7/00304—Overcurrent protection
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- 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
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
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- 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
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- 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
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- 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)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to the technical field of power supplies, in particular to a battery pack and electronic equipment, wherein the battery pack comprises a battery core module and a battery control circuit electrically connected with the battery core module, a port module used for being spliced with a load, a port positive pin of the port module is connected with a battery positive pin of the battery core module, a communication isolation module connected between the battery control circuit and the port module, an isolation grounding pin of the communication isolation module is connected with a port grounding pin of the port module, when the port grounding pin is disconnected with a load grounding pin of the load, the isolation grounding pin is in a suspended state, and the communication isolation module responds to the suspended state of the isolation grounding pin to enter a working stop state so as to cut off a target loop formed by the battery core module, the load, the port module, the communication isolation module and the battery control circuit. At this time, the communication isolation module can prohibit the voltage output by the battery cell module from flowing backwards and returning to the battery control circuit, so that the stability of the battery pack is improved.
Description
Technical Field
The present invention relates to the field of power supplies, and in particular, to a battery pack and an electronic device.
Background
With the rapid development of the unmanned aerial vehicle industry, the serial number, the voltage and the current of a battery pack carried by the unmanned aerial vehicle are continuously increased, and enough electric energy is provided for the unmanned aerial vehicle to meet the flight requirement of the unmanned aerial vehicle. With the increase of the number of battery strings, the communication problem of the high-voltage battery also follows, especially when the battery is hot-plugged, if the negative electrode is disconnected first, the high voltage generated instantaneously can rush to the communication port, thereby causing serious damage to devices inside the battery.
Disclosure of Invention
The embodiment of the invention provides a battery pack and electronic equipment, and aims to solve the technical problem that in the related art, when a battery is hot plugged, high voltage is easy to flow back to the battery, so that internal devices of the battery are damaged.
In order to solve the technical problems, the technical scheme adopted by the embodiment of the invention is to provide a battery pack, which comprises:
the battery cell module comprises a battery anode pin and a battery cathode pin;
The battery control circuit is electrically connected with the battery cell module;
the port module is used for being spliced with a load and comprises a port positive pin and a port grounding pin, wherein the port positive pin is electrically connected with the battery positive pin, and the load comprises a load positive pin and a load grounding pin;
The communication isolation module is electrically connected between the battery control circuit and the port module, the communication isolation module comprises an isolation grounding pin, the isolation grounding pin is electrically connected with the port grounding pin, when the port positive electrode pin is electrically connected with the load positive electrode pin, but the port grounding pin is disconnected with the load grounding pin, the isolation grounding pin is in a suspended state, and the communication isolation module responds to the suspended state of the isolation grounding pin to enter a working stop state so as to cut off a target loop formed by the battery module, the load, the port module, the communication isolation module and the battery control circuit.
Optionally, the port module further includes a port communication pin, the load further includes a load communication pin, the battery control circuit includes a battery communication pin, and the communication isolation module is electrically connected between the battery communication pin and the port communication pin;
When the port positive pin is electrically connected with the load positive pin, but the port ground pin is disconnected from the load ground pin, the communication isolation module maintains communication interaction with the battery control circuit based on the battery communication pin.
Optionally, the communication isolation module includes:
A first communication isolation circuit electrically connected to the battery control circuit based on the battery communication pin;
The second communication isolation circuit is electrically connected with the first communication isolation circuit and is also respectively electrically connected with the port communication pin and the port grounding pin, the second communication isolation circuit is provided with the isolation grounding pin, when the port grounding pin is disconnected with the load grounding pin, the second communication isolation circuit responds to the suspended state of the isolation grounding pin to stop working, and the first communication isolation circuit keeps communication interaction with the battery control circuit based on the battery communication pin.
Optionally, the first communication isolation circuit includes a first side ground connection pin electrically connected to the battery negative terminal pin and a first side communication pin electrically connected to the battery communication pin.
Optionally, the second communication isolation circuit includes:
A second side communication pin electrically connected to the port communication pin;
The second grounding pin is electrically connected with the port grounding pin, the second grounding pin is the isolation grounding pin, when the port grounding pin is connected with the load grounding pin, the second grounding pin is connected with the battery cathode pin through the port grounding pin, the second side communication isolation circuit is based on the second side communication pin and the load communication pin to interact with the load communication, and when the port grounding pin is disconnected from the load grounding pin, the second side grounding pin is in a suspended state.
Optionally, the battery control circuit includes:
The battery management chip is electrically connected with the battery cell module and is used for detecting working data of the battery cell module;
the signal acquisition circuit is electrically connected with the battery management chip and is used for acquiring environmental data of the battery cell module;
And the controller is respectively in communication connection with the battery management chip and the communication isolation module and is used for controlling the battery management chip to perform communication interaction with the communication isolation module.
Optionally, the signal acquisition circuit includes:
The temperature detection circuit is electrically connected with the battery management chip and used for detecting the temperature of the battery cell module;
and the current detection circuit is electrically connected with the battery cathode pin and the battery management chip and is used for detecting current data of the battery cell module.
Optionally, the port module further includes a port control pin, and the controller is configured with a reset pin, where the port control pin is electrically connected with the reset pin, and is configured to transmit a control signal sent by the load to the battery management chip, so that the battery management chip controls a charge and discharge state of the battery cell module.
Optionally, the battery pack further includes a backflow prevention circuit, and the backflow prevention circuit is electrically connected between the reset pin and the port control pin, and is configured to prevent current from the port module from flowing backward to the controller when the port ground pin is disconnected from the load ground pin.
In order to solve the technical problems, a further technical scheme adopted by the embodiment of the invention is to provide an electronic device, which comprises
Load, and
The battery pack as described above.
The invention provides a battery pack and electronic equipment, which are different from the situation of related technologies, wherein the battery pack comprises a battery core module, a battery control circuit and a port module, the battery pack comprises a battery anode pin and a battery cathode pin, the battery control circuit is electrically connected with the battery core module, the port module is used for being spliced with a load and comprises a port anode pin and a port grounding pin, the port anode pin is electrically connected with the battery anode pin, the load comprises a load anode pin and a load grounding pin, a communication isolation module is electrically connected between the battery control circuit and the port module, the communication isolation module comprises an isolation grounding pin, the isolation grounding pin is electrically connected with the port grounding pin, when the port anode pin is electrically connected with the load anode pin, but the port grounding pin is disconnected with the load grounding pin, the isolation grounding pin is in a suspended state, and the communication isolation module responds to the suspended state of the isolation grounding pin to enter a work stop state so as to cut off the battery core module, the load, the communication isolation module and the battery control module and a target circuit loop. At this time, when the cell module outputs a voltage to the port module, the voltage is isolated by the communication isolation module, so that the voltage output by the cell module is prevented from flowing backwards and flowing back to the battery control circuit, and the stability of the battery pack is improved.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to scale, unless expressly stated otherwise.
Fig. 1 is a block diagram of an electronic device according to an embodiment of the present invention;
Fig. 2 is a block diagram of a battery pack according to an embodiment of the present invention;
FIG. 3 is a block diagram of a communication isolation module according to an embodiment of the present invention;
Fig. 4 is a circuit diagram of a battery pack according to an embodiment of the present invention;
fig. 5 is a block diagram of a battery management circuit according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It should be noted that, if not in conflict, the features of the embodiments of the present invention may be combined with each other, which are all within the protection scope of the present invention. In addition, while the division of functional blocks is performed in a device diagram and the logic sequence is shown in a flowchart, in some cases, the steps shown or described may be performed in a different order than the block division in a device diagram or the sequence in a flowchart.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.
Currently, when a battery pack is required to supply power to a load, the battery pack is plugged into the load. At this time, the positive electrode port of the battery pack, the load, and the negative electrode port of the battery pack form a power supply circuit, and the battery pack supplies power to the load based on the power supply circuit. And when the power is supplied to the load, communication interaction is performed with the load based on the communication port, so that the information such as the power supply voltage of the load is determined.
However, when the battery pack supplies power to the load, the battery pack may be hot plugged (hot plugged). At this time, if the negative electrode port of the battery pack is disconnected with the load first or the positive electrode port of the battery pack is connected with the load first, the positive electrode port of the battery pack, the load and the communication port of the battery pack form a loop, so that the high voltage output by the positive electrode port of the battery pack reversely flows into the battery pack through the communication port, and the battery pack is damaged.
Therefore, in order to solve the above-mentioned technical problems, the related art has a voltage regulator tube provided in the battery pack, a cathode of the voltage regulator tube being connected to the communication port, and an anode of the voltage regulator tube being a voltage output terminal.
When the battery pack is hot plugged and the negative electrode port is disconnected or the positive electrode port is accessed, the high voltage output by the positive electrode port of the battery pack is input to the cathode of the voltage stabilizing tube, so that the high voltage output by the positive electrode port is inhibited through the voltage stabilizing characteristic of the voltage stabilizing tube. However, when the positive electrode port outputs a continuous high voltage, the voltage regulator tube is broken down by the continuous high voltage, so that the high voltage is input to the battery pack through the voltage regulator tube, and the battery pack is damaged.
Or the related art customizes a terminal with a negative electrode firstly contacted through die opening customization, but the applicability of the die opening customization is lower, different terminals are required to be designed for different products, and the customization period is overlong, so that the cost of the battery pack is increased.
Based on the above, the communication isolation module is arranged in the communication loop of the battery pack and the load, so that the battery pack can communicate and interact with the load only through the communication isolation module. At this time, when the battery pack is hot-plugged and the positive electrode port is in contact with or hot-pulled earlier than the negative electrode port, and the positive electrode port is disconnected later than the negative electrode port, if the communication loop is not isolated by the communication isolation module, when the power supply loops of the positive electrode port, the load and the negative electrode port of the battery pack are disconnected, the high voltage of the positive electrode port of the battery pack can be reversely poured into the battery pack through the communication port, so that the battery pack is damaged. And when the situation occurs, the communication isolation module is arranged in the communication loop, so that the high voltage output by the positive electrode port is isolated through the communication isolation module, the high voltage is further ensured not to be reversely poured into the battery pack, and the service life of the battery pack is prolonged.
In the following, an embodiment of the present application provides a battery pack, which can be applied to an electronic device, and referring to fig. 1, fig. 1 is a block diagram of an electronic device provided in the embodiment of the present application, as shown in fig. 1, the electronic device 1 includes a battery pack 100 and a load 200, where the battery pack 100 is configured to be plugged into the load 200, and output a supply voltage to the load 200 when plugged into the load 200, so as to supply power to the load 200.
In some embodiments, when the load 200 is a powered device, such as an unmanned aerial vehicle, a model car, a remote control plane, an electric wrench, etc., the battery pack 100 is configured to output a voltage to the powered device to power the powered device.
In another embodiment, when the load 200 is a charging device, such as an energy storage power source, a photovoltaic input source, etc., the battery pack 100 is configured to receive the electrical energy input by the load 200 and convert the electrical energy into chemical energy for storage.
Referring to fig. 2, fig. 2 is a block diagram of a battery pack according to an embodiment of the present invention, and as shown in fig. 2, the battery pack 100 includes a battery cell module 10, a battery control circuit 20, a port module 30, and a communication isolation module 40;
the cell module 10 comprises a battery cathode pin N1 and a battery anode pin N2;
in some embodiments, as shown in fig. 2, the cell module 10 includes a charge-discharge circuit 11 and a plurality of cells 12, the charge-discharge circuit 11 is connected to the plurality of cells 12, and the charge-discharge circuit 11 is further connected to the battery control circuit 20.
The charge/discharge circuit 11 is configured to receive a driving signal output by the battery control circuit 20, and control charging or discharging of the plurality of electric cells 12 based on the driving signal. The charge-discharge circuit 11 receives electrical energy input from the outside and inputs the electrical energy into the plurality of electrical cells 12 when the plurality of electrical cells are charged, so that the plurality of electrical cells convert the electrical energy into chemical energy for storage, or receives electrical energy output after the plurality of electrical cells 12 are converted and outputs the electrical energy to the load 200 when the plurality of electrical cells are discharged, thereby supplying power to the load 200.
Wherein each of the plurality of cells 12 is connected in series with each other. When the plurality of battery cells 12 are in a charging state, the plurality of battery cells 12 are charged synchronously, so that the condition of overcharging or undervoltage of the battery cells is avoided, and when the plurality of battery cells 12 are in a discharging state, the plurality of battery cells 12 are discharged synchronously, so that stable current and voltage are provided.
The battery control circuit 20 is electrically connected to the cell module 10.
The port module 30 is used for being plugged with the load 200 and comprises a port positive pin M1 and a port grounding pin M3, the port positive pin M1 is electrically connected with the battery positive pin N2, and the load 200 comprises a load positive pin L2 and a load grounding pin L1.
The communication isolation module 40 is electrically connected between the battery control circuit 20 and the port module 30, the communication isolation module 40 includes an isolation ground pin M4, the isolation ground pin M4 is electrically connected with the port ground pin M3, when the port positive pin M1 is electrically connected with the load positive pin L2, but the port ground pin M3 is disconnected with the load ground pin L1, the isolation ground pin M4 is in a suspended state, and the communication isolation module 40 responds to the suspended state of the isolation ground pin M4 to enter into a working stop state so as to cut off a target loop formed by the battery cell module 10, the load 200, the port module 30, the communication isolation module 40 and the battery control circuit 20.
It can be appreciated that, in the plugging process of the port module 30 with the load 200, after the port positive pin M1 is electrically connected with the load positive pin L2, if the cell module 10 is in a discharging state (hot plug of the battery pack), the voltage of the cell module 10 flows into the port positive pin M1 through the battery positive pin N2. At this time, if the port ground pin M3 is electrically connected to the load ground pin L1, the port ground pin M3 is connected to the battery negative pin N1, and the voltage output by the battery cell module 10 flows back to the battery cell module 10 through the port module 30 and the load 200, so as to supply power to the load 200. At this time, the load 200 normally communicates with the battery pack 100. If the port ground pin M3 is disconnected from the load ground pin L1, the voltage output by the battery cell module 10 may flow back to the battery control circuit 20 through the communication pin of the port module 30 and the communication isolation module 40, and once the voltage output by the battery cell module 10 exceeds the maximum bearing voltage of the battery control circuit 20, the battery control circuit 20 may be damaged, thereby reducing the stability of the battery pack 100. It can be appreciated that the hot-plug process of the battery pack is similar to the hot-plug process described above, and will not be described in detail in this embodiment.
Therefore, in the embodiment of the present application, the communication isolation module 40 is configured to electrically connect the isolated ground pin M4 with the port ground pin M3, and when the port ground pin M3 is disconnected from the load ground pin L1, the isolated ground pin M4 is in a suspended state, and the communication isolation module 40 enters a working stop state. At this time, when a high voltage exists in the port module 30, the voltage is isolated by the communication isolation module 40, so that the voltage output by the cell module 10 is prevented from flowing backward to the battery control circuit 20, and the stability of the battery pack is improved.
In some embodiments, referring to fig. 2, the port module 30 further includes a port communication pin M2, the load 200 further includes a load communication pin L3, the battery control circuit 20 includes a battery communication pin M5, and the communication isolation module 40 is electrically connected between the battery communication pin M5 and the port communication pin M2;
When the port positive pin M1 is electrically connected to the load positive pin L2, but the port ground pin M3 is disconnected from the load ground pin L1, the communication isolation module 40 maintains communication interaction with the battery control circuit 20 based on the battery communication pin M5.
It should be noted that, the communication isolation module 40 is mainly used for preventing the voltage output by the battery positive electrode pin N2 from flowing backward to the battery control circuit 20 through the communication isolation module 40 when the load ground pin L1 is disconnected from the port ground pin M3. Thus, during operation of the battery pack 100, the communication isolation module 40 still communicates with the battery control circuit 20, but also communicates with the load 200, and it is necessary to determine whether the port ground pin M3 is connected to the load ground pin L1.
When the battery control circuit 20 is connected to the cell module 10, the battery control circuit 20 is configured to output a discharge signal to the cell module 10, so as to start discharging the cell module 10. When the cell module 10 discharges, the battery control circuit 20 is further configured to obtain operation data (output voltage, output current, etc.) of the cell module 10, and transmit the operation data to the communication isolation module 40. At this time, if the port module 30 is plugged (i.e. hot plugged) with the load 200 and the port ground pin M3 is electrically connected with the load ground pin L1, the isolation ground pin M4 is connected with the battery negative electrode pin N1 through the port ground pin M3, and the communication isolation module 40 starts to operate, so that the battery module 10, the load 200, the port module 30, the communication isolation module 40 and the battery control circuit 20 form a target loop. The battery control circuit 20 may transmit the operation data to the load 200 based on the target loop so that the load 200 determines the current operation data. After the load 200 obtains the current working data, if the current working data needs to be modified, the modification data is sent to the communication isolation module 40, so that the modification data is sent to the battery control circuit 20 based on the communication isolation module 40. After the battery control circuit 20 receives the modification data, the output voltage, the output current, etc. of the battery module 10 are modified based on the modification data, so as to meet the working requirement of the load 200. Based on this, communication interaction between the battery control circuit 20 and the load 200 can be achieved.
Further, after the load ground pin L1 is disconnected from the port ground pin M3, the isolation ground pin M4 is in a suspended state, so that the communication isolation module 40 enters a working stop state. At this time, the target circuit is cut off, and the battery control circuit 20 also stops communication interaction with the load 200. Meanwhile, since the target loop is cut off, the high-voltage reverse filling of the port module 30 into the battery control circuit 20 is inhibited, and thus the devices in the battery control circuit 20 are prevented from being damaged.
In some embodiments, referring to fig. 3, the communication isolation module 40 includes a first communication isolation circuit 41 and a second communication isolation circuit 42.
The first communication isolation circuit 41 is electrically connected with the battery control circuit 20 based on the battery communication pin M5;
The second communication isolation circuit 42 is electrically connected with the first communication isolation circuit 41 and is also electrically connected with the port communication pin M2 and the port grounding pin M3, the second communication isolation circuit 42 is provided with the isolation grounding pin M4, when the port grounding pin M3 is disconnected from the load grounding pin L1, the second communication isolation circuit 42 responds to the suspended state of the isolation grounding pin M4 to stop working, and the first communication isolation circuit 41 maintains communication interaction with the battery control circuit 20 based on the battery communication pin M5.
In some embodiments, referring to fig. 2 and 3, after the battery module 10 starts to operate, the first communication isolation circuit 41 is configured to receive the operation data output by the battery control circuit 20. If the port ground pin M3 is electrically connected to the load ground pin L1, the isolation ground pin M4 of the second communication isolation circuit 42 is connected to the battery negative electrode pin N1 (i.e., forms a power supply loop) through the port ground pin M3 and the load ground pin L1, and the second communication isolation circuit 42 starts to operate. At this time, the second communication isolation circuit 42 starts receiving the operation data outputted from the first communication isolation circuit 41 and outputs the operation data to the load 200. When the load 200 feeds back modification data based on the operation data, the second communication isolation circuit 42 is configured to receive the modification data and transmit the modification data to the first communication isolation circuit 41, so as to feed back the modification data to the battery control circuit 20 through the first communication isolation circuit 41, thereby modifying the output voltage, the output current, etc. of the battery module 10. Thereby enabling communication interaction between the battery control circuit 20 and the load 200.
In another embodiment, after the port ground pin M3 is disconnected from the load ground pin L1, the second communication isolation circuit 42 disconnects the power supply circuit from the battery negative pin N1, thereby stopping the operation. At this time, the second communication isolation circuit 42 stops transmitting data between the first communication isolation circuit 41 and the load 200, and at the same time, the high voltage in the port module 30 is isolated by the second communication isolation circuit 42, thereby protecting the battery control circuit 20 from being damaged, and further improving the reliability of the battery pack 100.
In some embodiments, referring to fig. 3, the first communication isolation circuit 41 includes a first ground connection pin M8 and a first side communication pin M7;
The first side grounding pin M8 is electrically connected to the battery negative electrode pin N1, and the first side communication pin M7 is electrically connected to the battery communication pin M5.
When the first ground connection pin M8 is connected to the battery negative connection pin N1, the first communication isolation circuit 41 is in communication interaction with the battery control circuit 20 based on the first communication pin M7.
In yet another embodiment, referring to fig. 3 and 2, the second communication isolation circuit 42 includes a second side communication pin M6 and a second ground pin, wherein the second ground pin is the isolation ground pin M4;
the second side communication pin M6 is electrically connected with the port communication pin M2;
The second side grounding pin M4 is electrically connected with the port grounding pin M3, when the port grounding pin M3 is connected with the load grounding pin L1, the second side grounding pin M4 is connected with the battery negative electrode pin N1 through the port grounding pin M3, and the second side communication isolation circuit 42 is in a suspended state based on the second side communication pin M6 and the load communication pin L3 and is in communication interaction with the load 200, and when the port grounding pin M3 is disconnected with the load grounding pin L1.
After the port grounding pin M3 is connected to the load grounding pin L1, the second grounding pin M4 is connected to the battery negative electrode pin N1 through the port grounding pin M3. At this time, the second communication isolation circuit 42 starts to operate, and the second side communication isolation circuit 42 communicates with the load 200 based on the second side communication pin M6 and the load communication pin L3. And when the port ground pin M3 is disconnected from the load ground pin L1, the second ground pin M4 is suspended, i.e. the second communication isolation circuit 42 is not grounded. At this time, the second communication isolation circuit 42 stops operating because there is no power supply loop, thereby stopping communication interaction between the battery control circuit 20 and the load 200.
Referring to fig. 4, in some embodiments, the port module 30 includes six pins, the first pin is a positive port pin, the sixth pin is connected to a negative battery pin N1, and the first pin and the sixth pin are mainly used for receiving the voltage output by the battery module 10, so as to supply power to the load 200. The second pin and the third pin are port communication pins, and when in communication, working data output by the communication isolation module 40 is received through the second pin, and modification data output by the load 200 is transmitted through the third pin. The fourth pin is a port grounding pin, when the port grounding pin is connected with the load grounding pin, the fourth pin and the sixth pin of the port module 30 are connected with each other, so that the isolation grounding pin M4 is connected with the battery cathode pin N1, and when the port grounding pin is disconnected with the load grounding pin, the isolation grounding pin M4 is in a suspended state, so that the second communication isolation circuit 42 stops working. The fifth pin is a port control pin.
In yet another embodiment, referring to fig. 4, the communication isolation circuit 40 is an isolation chip U3, wherein a first communication isolation circuit 41 is disposed on the left side of the isolation chip U3, and a second communication isolation circuit 42 is disposed on the right side of the isolation chip U3. The left ground pin of the isolation chip U3 is connected to the battery negative pin N1, and the communication pin M8 is connected to the battery control circuit 20. The ground pin M4 on the right side of the isolation chip U3 is connected to the fourth pin of the port module 30, and the communication pin M6 of the isolation chip U3 is connected to the port communication pin of the port module 30. Optionally, the model of the isolation chip U3 is CAIS3642LVW. In some embodiments, other types of chips that function identically to the chip CAIS3642LVW may also be used as the isolated chip U3.
It is noted that the measurement out in fig. 4 is determined based on the connection of the port ground pin and the load ground pin. When the port ground pin is disconnected from the load ground pin, the second (right) side ground pin M4 of the isolated chip U3 is in a suspended state. At this time, the second side of the isolation chip U3 stops working because of no power supply circuit, and after the port ground pin is connected to the load ground pin, the second ground pin M4 (i.e., 9 pins and 15 pins) of the isolation chip U3 is electrically connected to the battery negative pin N1 through the port module 30. At this time, the 9 pins of the isolation chip U3, the port module 30, the load 200 and the battery negative pin N1 form a loop, the ground terminal on the second side of the isolation chip U3 is not suspended any more, and the second side of the isolation chip U3 starts to work.
In some embodiments, as illustrated in fig. 4, the first side communication pin M8 of the isolation chip U3 includes a signal receiving pin M8 'and a signal transmitting pin M8", and the second side communication pin M6 includes a signal receiving pin M6' and a signal transmitting pin M6". When the battery control circuit 20 performs communication interaction with the load 200, the isolation chip U3 receives the working data output by the battery control circuit 20 through the signal receiving pin M8' on the first side, and after receiving the working data, sends the working data to the load 200 through the signal sending pin M6″ on the second side. And the modification data fed back through the signal receiving pin M6' of the second side, and the modification data is fed back to the battery management circuit 20 through the signal transmitting pin M8″ of the first side, so as to realize communication interaction between the battery management circuit 20 and the load 200.
In some embodiments, the power pins on the left side and the right side of the isolation chip U3 are controlled to be connected with different power and ground ends, so that signals on two sides of the isolation chip U3 are ensured not to interfere with each other, and further, the signal quality is improved, the sharing of the ground end type ground loop is avoided, and the electrical safety is further enhanced.
It is appreciated that in some embodiments, the isolated chip U3 is an isolated chip that integrates an isolated power supply and a signal, i.e., an isolated power supply is integrated into the integrated chip during the process of integrating the chip. The isolation power supply is used for providing power supply for the second side of the isolation chip U3, and the power supply is provided through the isolation power supply, so that a loop is prevented from being formed between the high voltage and a second side power supply pin (the 16 th pin of the isolation chip U3) during hot plug of the battery, and the safety of a circuit is further improved.
Referring to fig. 5, in some embodiments, the battery control circuit 20 includes a battery management chip 21, a signal acquisition circuit 22, and a controller 23;
The battery management chip 21 is electrically connected with the cell module 10 and is used for detecting working data of the cell module 10;
the signal acquisition circuit 22 is electrically connected with the battery management chip 21 and is used for acquiring environmental data of the battery cell module 21;
the controller 23 is respectively connected with the battery management chip 21 and the isolation module 40, and is used for controlling the battery management chip 21 to perform communication interaction with the communication isolation module 40.
Specifically, when the battery cell module 10 needs to be controlled to charge or discharge, the battery management chip 21 outputs a driving signal to the battery cell module 10, so that the battery cell module 10 starts to charge or discharge. When the battery cell module 10 starts to charge and discharge, the battery management chip 21 detects the voltage of each battery cell in the battery cell module 10 and the working data such as the output voltage and the output current of the battery cell module 10, and transmits the working data to the controller 23, so that the controller 23 transmits the working data to the communication isolation module 40.
When the controller 23 transmits the working data to the communication isolation module 40, it also receives the modification data fed back by the communication isolation module 40, and transmits the modification data to the battery management chip 21, so that the battery management chip 21 controls the working state of the battery cell module 10 based on the modification data, and further adjusts the output voltage and the output current of the battery cell module 10. Based on this, communication interaction between the battery management chip 21 and the communication isolation module 40 can be achieved by the controller 23.
In yet another embodiment, after the battery cell module 10 starts to charge and discharge, the battery management chip 21 further collects environmental data such as temperature and discharge current of the battery cell module 10 in real time based on the signal collection circuit 22, and determines whether the battery cell module 10 has an overcurrent, overdischarge, or abnormal temperature condition based on the environmental data. If so, a shutdown signal is output to the cell module to stop the charge and discharge of the cell module 10.
In some embodiments, referring to fig. 4, the charge-discharge circuit 10 includes a first fet Q1 and a second fet Q2;
The grid electrode of the first field effect tube Q1 and the grid electrode of the second field effect tube Q2 are respectively connected with the battery management chip 21, the source electrode of the first field effect tube Q1 is connected with the battery anode pin N2 of the battery core module 10, the drain electrode of the first field effect tube Q1 is connected with the drain electrode of the second field effect tube Q2, and the source electrode of the second field effect tube Q2 is connected with the port anode pin of the port module 30.
When the battery management chip 21 outputs a driving signal, the first fet Q1 is turned on due to the satisfaction of the turn-on condition, and the second fet Q2 is turned on accordingly, and when the first fet Q1 and the second fet Q2 are turned on, the voltage of the battery cell module 10 is output to the port positive pin M1 of the port module 30 through the battery positive pin N2, the first fet Q1 and the second fet Q2. At this time, if the port module 30 and the load 200 are in a plugging state, the port module 30 can supply power to the load 200.
In some embodiments, if the load 200 is a power supply device, that is, when the port module 30 is plugged into the load 200, a voltage is input to the battery positive pin N2 through the port module 30, the second fet Q2, and the first fet Q1, so as to charge the battery cell module 10.
The first field effect transistor and the second field effect transistor are N-channel field effect transistors.
In some embodiments, referring to fig. 5, the signal acquisition circuit 22 includes a temperature detection 221 and a current detection circuit 222;
A temperature detection circuit 221, electrically connected to the battery management chip 21, for detecting the temperature of the cell module 10;
the current detection circuit 222 is electrically connected to the battery cathode pin N1 and electrically connected to the battery management chip 21, and is configured to detect current data of the battery cell module 10.
When the battery cell module 10 starts to charge and discharge, the battery management chip 21 detects the battery temperature of the battery cell module 10 in real time based on the temperature detection circuit 221, detects the current signal in the circuit based on the current measurement circuit 222, and controls the battery cell module 10 to stop charging and discharging when the temperature of the battery cell module 10 is abnormal and/or the current signal in the circuit is too large, so as to avoid the situation that the battery cell module 10 is overdischarged or has too high temperature, thereby improving the stability of the battery cell module 10.
In some embodiments, referring to fig. 4, the temperature detection circuit 222 includes a resistor R1, where the resistor R1 is connected to a temperature detection pin of the battery detection chip 21. The resistor R1 is a thermistor, and its resistance varies with temperature. Based on this, it is possible to determine whether the resistance value of the resistor R1 is within a preset range by detecting and judging, and if not, it is possible to determine that the temperature of the cell module 10 is abnormal.
In some embodiments, the current detection circuit 222 includes a resistor R2, where the resistor R2 is connected to the battery negative pin N2, the port ground pin M3, and the battery management chip 21, respectively. When the battery cell module 10 starts to charge and discharge, the output voltage of the positive electrode pin N2 of the battery flows through the port module 30 and the resistor R2 and returns to the negative electrode pin N1 of the battery, and at this time, the battery management chip 21 detects the voltage on the resistor R2 and amplifies the voltage several times and converts the voltage into a digital signal, so as to determine whether the battery cell module 10 has an overcurrent condition or not based on the digital signal.
Referring to fig. 4, in some embodiments, the controller 23 is configured with a reset pin (REST) that is electrically connected to the port control pins of the port module 30. The port module 30 is configured to transmit a control signal sent by the load 200 to the battery management chip 21, so that the battery management chip 21 controls the charge and discharge states of the battery cell module 10.
It may be known that, when the load positive pin is connected to the port positive pin and the load negative pin is connected to the port ground pin, if the cell module 10 is in a static state, a user outputs a control signal based on the load, and when the port module 30 receives the control signal, the control signal is output to the controller 23 through the port control pin, so that the controller 23 controls the battery management chip 21 to drive the charge/discharge circuit 11 to operate, thereby discharging the cell module 10.
In yet another embodiment, referring to fig. 2, the battery pack 100 further includes a backflow prevention circuit 50, wherein the backflow prevention circuit 50 is electrically connected between the reset pin M10 and the port control pin M9, and is configured to prevent the current from the port module 30 from flowing backward to the controller 23 when the port ground pin M3 is disconnected from the load ground pin L1.
Referring to fig. 4, in some embodiments, the backflow prevention circuit 50 includes a regulator D1, a cathode of the regulator D1 is connected to the port control pin, and an anode of the regulator D1 is connected to the reset pin. When the load 200 pulls out the port module 30, based on the voltage stabilizing characteristic of the voltage stabilizing tube D1, the current in the port module 30 is isolated, so as to protect the controller 23, and further improve the stability of the circuit.
In some embodiments, when the port ground pin is connected to the load ground pin, if the cell module 10 is in a static state, the controller 23 receives a control signal output by the port module 30, and controls the battery management chip 21 to drive the first fet Q1 and the second fet Q2 to be turned on based on the control signal, so as to start to supply power to the load 200 through the port positive pin and the port ground pin.
If the cell module 10 is in the power supply state, when the load 200 is plugged into the port module 30 and the second ground pin of the isolation chip U3 is grounded, the battery control chip 21 may acquire the working data and the environmental data of the cell module 10 in real time, and transmit the working data to the controller 23, so that the controller 23 transmits the working data to the load 200 through the isolation chip U3. If the load 200 needs to modify the power supply condition, the modification data is sent to the isolation chip U3 according to the requirement, but after the isolation chip U3 receives the modification data, the modification data is sent to the controller 23, so that the controller 23 sends the modification data to the battery management chip 21, and the battery management chip 21 adjusts the working data of the battery module 10. Based on this, communication interaction can be realized while the load 200 is powered when the battery pack 100 is electrically connected to the load 200.
When the cell module 10 is in a power supply state and the load 200 is disconnected from the port module 30, the second side grounding pin of the isolation chip U3 is suspended, and the second side of the isolation chip U3 stops transmitting information. At this time, even if the positive electrode pin N2 of the battery still outputs voltage to the port module 30, and the negative electrode pin N1 of the battery is disconnected from the port ground pin, the high voltage on the port module 30 will not be reversely poured into the controller 23 and the battery management chip 21, thereby protecting the controller 23 and the battery management chip 21 from being damaged, and further improving the stability of the battery pack.
The embodiment of the invention provides a battery pack, which comprises a battery core module, a battery control circuit and a communication isolation module, wherein the battery core module comprises a battery anode pin and a battery cathode pin, the battery control circuit is electrically connected with the battery core module, the port module is used for being spliced with a load and comprises a port anode pin and a port grounding pin, the port anode pin is electrically connected with the battery anode pin, the load comprises a load anode pin and a load grounding pin, the communication isolation module is electrically connected between the battery control circuit and the port module and comprises an isolation grounding pin, the isolation grounding pin is electrically connected with the port grounding pin, when the port anode pin is electrically connected with the load anode pin, but the port grounding pin is disconnected with the load grounding pin, the isolation grounding pin is in a suspension state, and the communication isolation module responds to the suspension state of the isolation grounding pin to enter a working stop state so as to cut off a target loop formed by the battery core module, the load, the port module, the communication isolation module and the battery control circuit. At this time, when the cell module outputs a voltage to the port module, the voltage is isolated by the communication isolation module, so that the voltage output by the cell module is prevented from flowing backwards and flowing back to the battery control circuit, and the stability of the battery pack is improved.
It should finally be noted that the above embodiments are only intended to illustrate the technical solution of the present invention and not to limit it, that the technical features of the above embodiments or of the different embodiments may be combined in any order, and that many other variations in the different aspects of the present invention as described above exist, which are not provided in details for the sake of brevity, and that although the invention has been described in the detailed description with reference to the foregoing embodiments, it should be understood by those skilled in the art that it may still make modifications to the technical solution described in the foregoing embodiments or equivalent to some of the technical features thereof, where these modifications or substitutions do not depart from the essence of the corresponding technical solution from the scope of the technical solution of the embodiments of the present invention.
Claims (10)
1. A battery pack, comprising:
the battery cell module comprises a battery anode pin and a battery cathode pin;
The battery control circuit is electrically connected with the battery cell module;
the port module is used for being spliced with a load and comprises a port positive pin and a port grounding pin, wherein the port positive pin is electrically connected with the battery positive pin, and the load comprises a load positive pin and a load grounding pin;
The communication isolation module is electrically connected between the battery control circuit and the port module, the communication isolation module comprises an isolation grounding pin, the isolation grounding pin is electrically connected with the port grounding pin, when the port positive electrode pin is electrically connected with the load positive electrode pin, but the port grounding pin is disconnected with the load grounding pin, the isolation grounding pin is in a suspended state, and the communication isolation module responds to the suspended state of the isolation grounding pin to enter a working stop state so as to cut off a target loop formed by the battery module, the load, the port module, the communication isolation module and the battery control circuit.
2. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells,
The port module further comprises a port communication pin, the load further comprises a load communication pin, the battery control circuit comprises a battery communication pin, and the communication isolation module is electrically connected between the battery communication pin and the port communication pin;
When the port positive pin is electrically connected with the load positive pin, but the port ground pin is disconnected from the load ground pin, the communication isolation module maintains communication interaction with the battery control circuit based on the battery communication pin.
3. The battery pack of claim 2, wherein the communication isolation module comprises:
A first communication isolation circuit electrically connected to the battery control circuit based on the battery communication pin;
The second communication isolation circuit is electrically connected with the first communication isolation circuit and is also respectively electrically connected with the port communication pin and the port grounding pin, the second communication isolation circuit is provided with the isolation grounding pin, when the port grounding pin is disconnected with the load grounding pin, the second communication isolation circuit responds to the suspended state of the isolation grounding pin to stop working, and the first communication isolation circuit keeps communication interaction with the battery control circuit based on the battery communication pin.
4. The battery pack of claim 3, wherein the first communication isolation circuit comprises a first side ground pin electrically connected to the battery negative pin and a first side communication pin electrically connected to the battery communication pin.
5. The battery pack of claim 3, wherein the second communication isolation circuit comprises:
A second side communication pin electrically connected to the port communication pin;
The second grounding pin is electrically connected with the port grounding pin, the second grounding pin is the isolation grounding pin, when the port grounding pin is connected with the load grounding pin, the second grounding pin is connected with the battery cathode pin through the port grounding pin, the second side communication isolation circuit is based on the second side communication pin and the load communication pin to interact with the load communication, and when the port grounding pin is disconnected from the load grounding pin, the second side grounding pin is in a suspended state.
6. The battery pack according to any one of claims 1 to 5, wherein the battery control circuit includes:
The battery management chip is electrically connected with the battery cell module and is used for detecting working data of the battery cell module;
the signal acquisition circuit is electrically connected with the battery management chip and is used for acquiring environmental data of the battery cell module;
And the controller is respectively in communication connection with the battery management chip and the communication isolation module and is used for controlling the battery management chip to perform communication interaction with the communication isolation module.
7. The battery pack of claim 6, wherein the signal acquisition circuit comprises:
The temperature detection circuit is electrically connected with the battery management chip and used for detecting the temperature of the battery cell module;
and the current detection circuit is electrically connected with the battery cathode pin and the battery management chip and is used for detecting current data of the battery cell module.
8. The battery pack of claim 6, wherein the port module further comprises a port control pin, the controller is configured with a reset pin, the port control pin is electrically connected with the reset pin, and is configured to transmit a control signal sent by the load to the battery management chip, so that the battery management chip controls the charge and discharge states of the battery cell module.
9. The battery pack of claim 8, further comprising a backflow prevention circuit electrically connected between the reset pin and the port control pin for preventing current from the port module from flowing back to the controller when the port ground pin is disconnected from the load ground pin.
10. An electronic device, comprising:
Load, and
The battery pack according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411775530.3A CN119561198A (en) | 2024-12-04 | 2024-12-04 | Battery pack and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411775530.3A CN119561198A (en) | 2024-12-04 | 2024-12-04 | Battery pack and electronic equipment |
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| Publication Number | Publication Date |
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| CN119561198A true CN119561198A (en) | 2025-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202411775530.3A Pending CN119561198A (en) | 2024-12-04 | 2024-12-04 | Battery pack and electronic equipment |
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| Country | Link |
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| CN (1) | CN119561198A (en) |
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2024
- 2024-12-04 CN CN202411775530.3A patent/CN119561198A/en active Pending
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