CN216903086U - Protection circuit of battery core and battery - Google Patents
Protection circuit of battery core and battery Download PDFInfo
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- CN216903086U CN216903086U CN202123156672.6U CN202123156672U CN216903086U CN 216903086 U CN216903086 U CN 216903086U CN 202123156672 U CN202123156672 U CN 202123156672U CN 216903086 U CN216903086 U CN 216903086U
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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
Abstract
The application provides a protection circuit of a battery core and a battery, wherein the protection circuit of the battery core comprises at least one battery core connection module, a signal acquisition module, a switch device and a control circuit, wherein the battery core connection module is used for respectively and electrically connecting two battery cores; the signal acquisition module is used for acquiring at least one of voltage data of the battery cell, temperature data of the battery cell and current data flowing through the battery cell connection module; the switch device comprises three terminals, wherein a first end of the switch device is electrically connected with the battery cell, and a second end of the switch device is electrically connected with the electric equipment or the power supply equipment; the control circuit is electrically connected with the signal acquisition module and the third end of the switching device and is used for receiving the working data and controlling the working state of the switching device according to the working data. The protection circuit avoids large heating devices and other devices from being integrated on the PCB through mutually separating different functional modules, thereby ensuring that the overall stability of the protection circuit is better.
Description
Technical Field
The application relates to the field of batteries, in particular to a protection circuit of a battery core and a battery.
Background
As 3C products (computer, communication, and consumer electronics) have shorter and shorter charging times, higher and higher charging currents are required. The use of Printed Circuit Board (PCB) boards for wiring design is now approaching the power limit. Since the main through-flow loop and the protection control are designed on the same PCB, it is difficult to maximize the through-flow design (to ensure the circuit function, the insulation isolation interval needs to be increased between lines, the main copper sheet is increased along with the routing, and the line width and the copper thickness are limited). In order to meet the requirement of large through current, more and more PCB copper layers are formed, the process difficulty is higher, the failure probability is higher and higher, the copper thickness of a larger through current layer is higher and higher, the etching grooves between PCB circuits are deeper and deeper along with the increase of the copper thickness, the risk of incomplete short circuit failure in etching exists, the copper surface layer is covered by solder resist oil or insulation PI (polyimide), the filling is insufficient along with the deepening of the etching grooves, and the insulation degree is reduced to cause the potential failure risk of insulation failure.
In addition, the temperature of the large-current copper sheet of the main loop influences the whole circuit board, and the long-term high temperature influences the operation stability of the whole circuit board (the stability of devices and the stability of welding spots).
The above information disclosed in this background section is only for enhancement of understanding of the background of the technology described herein and, therefore, certain information may be included in the background that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
SUMMERY OF THE UTILITY MODEL
The main aim at of this application provides a protection circuit and battery of electricity core to copper skin temperature influences whole circuit board among the PCB protection circuit among the solution prior art, influences the problem of overall stability.
In order to achieve the object, according to one aspect of the present application, a protection circuit of a battery cell is provided, which includes at least one battery cell connection module, a signal acquisition module, a switching device, and a control circuit, where the battery cell connection module is configured to electrically connect two battery cells respectively; the signal acquisition module is used for acquiring working data, and the working data comprises at least one of voltage data of the battery cell, temperature data of the battery cell and current data flowing through the battery cell connection module; the switching device comprises three terminals, wherein a first end of the switching device is electrically connected with the battery core, and a second end of the switching device is electrically connected with electric equipment or power supply equipment; the control circuit is electrically connected with the signal acquisition module, the control circuit is also electrically connected with a third end of the switch device, and the control circuit is used for receiving the working data and controlling the working state of the switch device according to the working data.
Optionally, the cell connection module comprises an electrical conductor comprising a first opposing surface and a second opposing surface, and a plurality of insulators; each of the insulators is located on a portion of the first surface and a portion of the second surface.
Optionally, the electrical conductor comprises a copper foil or a nickel foil.
Optionally, the insulator comprises a PI film.
Optionally, the signal acquisition module includes at least one of a voltage sensor, a current sensor and a temperature sensor, the voltage sensor is electrically connected to the battery cell, and the voltage sensor is configured to acquire the voltage data; the current sensor is electrically connected with the battery cell connecting module and is used for detecting the current data; the temperature sensor is electrically connected with the battery core and is used for acquiring the temperature data.
Optionally, the control circuit includes a comparator, a first input end of the comparator is electrically connected to the signal acquisition module, a second input end of the comparator is configured to receive reference data, and an output end of the comparator is electrically connected to a third end of the switching device, where the reference data includes at least one of reference voltage data, reference temperature data, and reference current data.
Optionally, the switching device comprises a MOS transistor.
Optionally, the control circuit is disposed at an interval with the battery cell connection module and the switch device, respectively.
According to another aspect of the present application, there is provided a battery including a plurality of battery cells and a protection circuit of any one of the battery cells.
Optionally, the battery is a fast-charging pouch battery.
By applying the technical scheme of the application, the protection circuit of the battery cell comprises at least one battery cell connection module, a signal acquisition module, a switch device and a control circuit, wherein the battery cell connection module is used for electrically connecting two battery cells; the signal acquisition module is used for acquiring at least one of voltage data of the battery cell, temperature data of the battery cell and current data flowing through the battery cell connection module; the switching device comprises three terminals, wherein a first end of the switching device is electrically connected with the battery core, and a second end of the switching device is electrically connected with electric equipment or power supply equipment; the control circuit is electrically connected with the signal acquisition module and the third end of the switching device, and is used for receiving the working data and controlling the working state of the switching device according to the working data. Compared with the prior art, the problem that the overall stability is influenced by the temperature of the copper sheet in the PCB protection circuit is solved, the problem that the overall stability is influenced by the heat of a large heating device during working due to the fact that the large heating device is heated and different functional modules are separated from each other by the protection circuit of the battery cell is avoided, and the heat of the battery cell connection module with large temperature rise in the protection circuit cannot influence the working of other devices, so that the overall stability of the protection circuit is guaranteed to be good.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
fig. 1 shows a schematic diagram of a protection circuit of a battery cell according to an embodiment of the present application.
Wherein the figures include the following reference numerals:
10. a battery cell connecting module; 20. a signal acquisition module; 30. a switching device; 40. a control circuit; 50. an electric core; 60. a power consumer or supply; 101. an electrical conductor; 102. an insulator.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. 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 application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As described in the background art, the temperature of the copper sheet in the PCB protection circuit in the prior art affects the entire circuit board, and affects the overall stability.
According to an exemplary embodiment of the present application, a protection circuit of a battery cell is provided, as shown in fig. 1, the protection circuit of a battery cell includes at least one battery cell connection module 10, a signal acquisition module 20, a switching device 30, and a control circuit 40, where the battery cell connection module 10 is configured to electrically connect two battery cells 50, respectively; the signal acquisition module 20 is configured to acquire working data, where the working data includes at least one of voltage data of the battery cell, temperature data of the battery cell, and current data flowing through the battery cell connection module; the switching device 30 includes three terminals, a first end of the switching device 30 is used for being electrically connected with the battery cell, and a second end of the switching device 30 is used for being electrically connected with an electric device or a power supply device 60; the control circuit 40 is electrically connected to the signal acquisition module 20, the control circuit 40 is further electrically connected to a third terminal of the switching device 30, and the control circuit 40 is configured to receive the working data and control a working state of the switching device 30 according to the working data.
The protection circuit of the battery cell comprises at least one battery cell connection module, a signal acquisition module, a switch device and a control circuit, wherein the battery cell connection module is used for electrically connecting two battery cells; the signal acquisition module is used for acquiring at least one of voltage data of the battery cell, temperature data of the battery cell and current data flowing through the battery cell connection module; the switching device comprises three terminals, wherein a first end of the switching device is used for being electrically connected with the battery core, and a second end of the switching device is used for being electrically connected with electric equipment or power supply equipment; the control circuit is electrically connected with the signal acquisition module and the third end of the switch device, and is used for receiving the working data and controlling the working state of the switch device according to the working data. Compared with the prior art, the whole circuit board is influenced by the temperature of the copper sheet in the PCB protection circuit, and the overall stability is influenced, the protection circuit of the electric core mutually separates different functional modules, large heating devices and other devices are prevented from being integrated on the PCB, the problem that the overall stability is influenced by the heating of the large heating devices in the working process is caused, the heat of the electric core connection module with the large temperature rise in the protection circuit can not influence the work of other devices, and the overall stability of the protection circuit is better.
According to an embodiment of the present disclosure, as shown in fig. 1, the cell connection module 10 includes a conductive body 101 and a plurality of insulators 102, where the conductive body 101 includes a first surface and a second surface opposite to each other; each of the insulators 102 is located on a portion of the first surface and a portion of the second surface. Among the above-mentioned electric core connection module, adopt the electric conductor to connect two electric cores electricity, the electric conductor is wireless, does not have the sculpture demand, has guaranteed that above-mentioned electric conductor can reach bigger thickness and bigger thread width, has guaranteed that the discharge current ability of the protection circuit of above-mentioned electric core is stronger, and the temperature rise is less, when guaranteeing that above-mentioned protection circuit satisfies the battery demand of more heavy current, has further guaranteed that the whole temperature rise of the protection circuit of above-mentioned electric core is less, and stability is better.
In a specific embodiment, according to U ═ IR, when a current flows through the conductor in the cell connection module, a voltage difference is formed across the conductor, and the signal acquisition module obtains current data according to the voltage difference and sends the current data to the control module, so that the control module monitors a real-time current value.
In order to further ensure that the current capacity of the protection circuit of the battery cell is stronger, according to another specific embodiment of the present application, the electrical conductor includes a copper foil or a nickel foil. In a more specific embodiment according to the present application, the electrical conductor is a pure copper foil or a pure nickel foil. Of course, the conductor is not limited to the copper foil or the nickel foil, and may be any material with better conductivity that is available in the prior art.
According to yet another embodiment of the present application, the insulator includes a PI film. The PI film is a thin film type insulating material with good performance. The PI film is attached to the area, needing insulation, of the battery cell connecting module, so that the insulation effect is achieved, the limitation of technologies such as circuit etching on the thickness and the width of the battery cell connecting module is further avoided, the through-current capacity of the battery cell connecting module is further guaranteed to be high, and the protection circuit of the battery cell can meet the requirement of a high-current battery.
In order to further ensure that the signal acquisition module simply, quickly and accurately acquires the working data and further facilitate the monitoring of the battery cell by the controller, according to a specific embodiment of the present application, the signal acquisition module includes at least one of a voltage sensor, a current sensor and a temperature sensor, the voltage sensor is electrically connected to the battery cell, and the voltage sensor is used for acquiring the voltage data; the current sensor is electrically connected with the battery cell connecting module and is used for detecting the current data; the temperature sensor is electrically connected with the battery cell and is used for collecting the temperature data.
And because the signal acquisition module only performs acquisition operation and the working current is small, the wire diameter FPC board or the wire used by the signal acquisition module can be small, the space used by the acquisition module is small, the available space of other modules is enlarged, and the requirement that the protection circuit of the battery cell can meet larger current is further ensured.
According to another specific embodiment of the present application, the control circuit includes a comparator, a first input terminal of the comparator is electrically connected to the signal acquisition module, a second input terminal of the comparator is configured to receive reference data, and an output terminal of the comparator is electrically connected to a third terminal of the switching device, where the reference data includes at least one of reference voltage data, reference temperature data, and reference current data. Therefore, the monitoring of the working data of the battery cell is further ensured, and the safety of the battery is further ensured.
According to another embodiment of the present application, the switching device includes a MOS (metal-Oxide-Semiconductor Field-Effect Transistor). The controller compares the received working data with the reference data, and outputs high and low levels according to the comparison result to control the turn-off or turn-on of the MOS tube, so as to realize the protection of the battery cell.
In order to further ensure that the stability of the protection circuit of the battery cell is better, according to a specific embodiment of the present application, the control circuit is separately disposed from the battery cell connection module and the switch device. When the circuit works at a large current, the battery core connecting module and the switch device are main heating sources, and the control circuit is arranged at intervals with the battery core connecting module and the switch device respectively, so that the stability of the control circuit under the condition of the large current is better, and the requirement that the protection circuit of the battery core can meet the large current is further ensured.
According to another exemplary embodiment of the present application, there is provided a battery including a plurality of battery cells and a protection circuit of any one of the battery cells.
The battery comprises a plurality of battery cells and a protection circuit of any one of the battery cells. Compared with the prior art, the whole circuit board is influenced by the temperature of the copper sheet in the PCB protection circuit, the overall stability is influenced, the battery separates different functional modules, large heating devices and other devices are prevented from being integrated on the PCB, the problem that the overall stability is influenced by the heat generated by the large heating devices in the working process is caused, the heat of the battery core connection module with the large temperature rise in the protection circuit can not influence the work of other devices, and the overall stability of the protection circuit is better.
According to an embodiment of the application, the battery is a fast-charging type pouch battery. Above-mentioned laminate polymer battery sheathes one deck polymer shell at liquid soft liquid lithium ion battery, adopts the plastic-aluminum membrane as the electric core packaging material of battery, and above-mentioned laminate polymer battery has advantages such as the security performance is better, light in weight, capacious, internal resistance is little and design flexibility, and above-mentioned fast type laminate polymer battery that fills charges is fast, and it is great to charging current requirement, and above-mentioned fast type laminate polymer battery that fills can guarantee that the battery demand of heavy current can be satisfied to the protection circuit of above-mentioned electric core.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:
1) the protection circuit of the battery cell comprises at least one battery cell connection module, a signal acquisition module, a switch device and a control circuit, wherein the battery cell connection module is used for electrically connecting two battery cells; the signal acquisition module is used for acquiring at least one of voltage data of the battery cell, temperature data of the battery cell and current data flowing through the battery cell connection module; the switching device comprises three terminals, wherein a first end of the switching device is used for being electrically connected with the battery core, and a second end of the switching device is used for being electrically connected with electric equipment or power supply equipment; the control circuit is electrically connected with the signal acquisition module and the third end of the switch device, and is used for receiving the working data and controlling the working state of the switch device according to the working data. Compared with the prior art, the whole circuit board is influenced by the temperature of the copper sheet in the PCB protection circuit, and the overall stability is influenced, the protection circuit of the electric core mutually separates different functional modules, large heating devices and other devices are prevented from being integrated on the PCB, the problem that the overall stability is influenced by the heating of the large heating devices in the working process is caused, the heat of the electric core connection module with the large temperature rise in the protection circuit can not influence the work of other devices, and the overall stability of the protection circuit is better.
2) The battery of the present application includes a plurality of battery cells and a protection circuit for any of the battery cells. Compared with the prior art, the whole circuit board is influenced by the temperature of the copper sheet in the PCB protection circuit, the overall stability is influenced, the battery separates different functional modules, large heating devices and other devices are prevented from being integrated on the PCB, the problem that the overall stability is influenced by the heat generated by the large heating devices in the working process is caused, the heat of the battery core connection module with the large temperature rise in the protection circuit can not influence the work of other devices, and the overall stability of the protection circuit is better.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A protection circuit of a battery cell, comprising:
the battery cell connection module is used for electrically connecting two battery cells respectively;
the signal acquisition module is used for acquiring working data, and the working data comprises at least one of voltage data of the battery cell, temperature data of the battery cell and current data flowing through the battery cell connection module;
the battery comprises a battery core, a switching device and a battery cover, wherein the switching device comprises three terminals, a first end of the switching device is used for being electrically connected with the battery core, and a second end of the switching device is used for being electrically connected with electric equipment or power supply equipment;
the control circuit is electrically connected with the signal acquisition module, is also electrically connected with a third end of the switching device, and is used for receiving the working data and controlling the working state of the switching device according to the working data.
2. The protection circuit of the cell of claim 1, wherein the cell connection module comprises:
an electrical conductor comprising opposing first and second surfaces;
a plurality of insulators, each insulator located on a portion of the first surface and a portion of the second surface.
3. The protection circuit of the battery cell of claim 2, wherein the electrical conductor comprises a copper foil or a nickel foil.
4. The protection circuit for a cell of claim 2, wherein the insulator comprises a PI film.
5. The protection circuit of the battery cell of claim 1, wherein the signal acquisition module comprises at least one of:
the voltage sensor is electrically connected with the battery cell and is used for acquiring the voltage data;
the current sensor is electrically connected with the battery cell connecting module and is used for detecting the current data;
and the temperature sensor is electrically connected with the battery cell and is used for acquiring the temperature data.
6. The protection circuit of the cell of claim 1, wherein the control circuit comprises:
the first input end of the comparator is electrically connected with the signal acquisition module, the second input end of the comparator is used for receiving reference data, and the output end of the comparator is electrically connected with the third end of the switching device, wherein the reference data comprises at least one of reference voltage data, reference temperature data and reference current data.
7. The protection circuit of the battery cell of any one of claims 1 to 6, wherein the switching device comprises a MOS transistor.
8. The protection circuit of the battery cell of any one of claims 1 to 6, wherein the control circuit is disposed at a distance from the battery cell connection module and the switching device, respectively.
9. A battery, comprising:
a plurality of cells;
the protection circuit for a cell of any of claims 1 to 8.
10. The battery according to claim 9, wherein the battery is a pouch battery of a quick-charge type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123156672.6U CN216903086U (en) | 2021-12-15 | 2021-12-15 | Protection circuit of battery core and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123156672.6U CN216903086U (en) | 2021-12-15 | 2021-12-15 | Protection circuit of battery core and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216903086U true CN216903086U (en) | 2022-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123156672.6U Active CN216903086U (en) | 2021-12-15 | 2021-12-15 | Protection circuit of battery core and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216903086U (en) |
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2021
- 2021-12-15 CN CN202123156672.6U patent/CN216903086U/en active Active
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