CN111816946A - Battery module temperature sensor and battery module - Google Patents
Battery module temperature sensor and battery module Download PDFInfo
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- CN111816946A CN111816946A CN202010748114.XA CN202010748114A CN111816946A CN 111816946 A CN111816946 A CN 111816946A CN 202010748114 A CN202010748114 A CN 202010748114A CN 111816946 A CN111816946 A CN 111816946A
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- battery module
- thin film
- flexible thin
- sensor
- temperature
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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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M10/4285—Testing apparatus
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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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a battery module temperature sensor and a battery module, and solves the technical problem that the temperature measurement effect of the battery module temperature sensor in the prior art is not ideal. The temperature sensor for the battery module comprises a temperature probe, a flexible thin film circuit and a sensor plug connector, wherein the temperature probe is arranged at the lower end of the flexible thin film circuit, the upper end of the flexible thin film circuit is connected with the sensor plug connector, the sensor plug connector is further connected with a sampling wire harness of a battery management system to realize signal transmission, the temperature probe is arranged between battery cores of the battery module to collect temperature signals, and the sensor plug connector is fixedly arranged on a module support of the battery module. The temperature probe can be conveniently and quickly arranged in the heat accumulation area at the center of the battery module, so that the real temperature of the battery module can be directly monitored.
Description
Technical Field
The invention relates to a temperature sensor, in particular to a battery module temperature sensor. The invention also relates to a battery module.
Background
Among various energy storage technologies, lithium ion batteries are becoming more and more of an option for industrial and on-board energy storage devices due to their high energy density characteristics and high commercialization prospects. However, the performance of a high-capacity and high-power energy storage battery system is sensitive to temperature changes, and the long-term high-low temperature environment and the accumulation of system temperature differences affect the service life and performance of the battery and may cause safety problems. Accurate and reliable battery temperature acquisition is the basis for the operation of thermal management systems. It is necessary to have a temperature sensor that can conveniently and accurately place the temperature probe at a suitable position inside the module.
The battery system is composed of a series of modules, and the modules are formed by stacking unit batteries (hereinafter, referred to as cells) in series and parallel. So calorific capacity is close to in the during operation electrical core load, but different electric cores can lead to the deviation of thermal diffusivity in the position difference of module to finally lead to in the module electric core temperature uneven. Generally, the temperature distribution inside the module exhibits the characteristics of being highest at the center, gradually decreasing at the periphery and at both ends of the module. The ideal temperature sensor location should be located in the heat accumulation area in the center of the module and be populated multiple times for redundancy.
Laminate polymer battery module because energy density's requirement, the mode that adopts single cell close packing to pile together usually, in order to retrain the battery inflation at the charge-discharge in-process, still can exert great pressure in order to guarantee the structural strength of module when the module is piled up. Therefore, the temperature sensor can not be inserted between the stacked electric cores. The current practice is to attach the temperature sensor to the module end plate, connect the busbar, or insert into the gap between the upper end of the soft-package battery and the structural component module (as shown in fig. 1). And then, the temperature deviation between the actual temperature and the sensor distribution position is determined for correction through an experimental calibration method, the maximum temperature of the module cannot be directly monitored by the schemes, the factory state can only be corrected, and the method is useless for the deviation caused by the thermal characteristic change generated in the life cycle or the sensor position change caused by vibration.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a battery module temperature sensor which can conveniently and quickly arrange a temperature probe to a heat accumulation area in the center of a battery module so as to realize the direct monitoring of the real temperature of the battery module.
The invention also provides a battery module, and the battery module temperature sensor is installed.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a battery module temperature sensor which comprises a temperature probe, a flexible thin film circuit and a sensor plug connector, wherein the temperature probe is arranged at the lower end of the flexible thin film circuit, the upper end of the flexible thin film circuit is connected with the sensor plug connector, the sensor plug connector is also connected with a sampling wire harness of a battery management system to realize signal transmission, the temperature probe is arranged between battery cores of a battery module to collect temperature signals, and the sensor plug connector is fixedly arranged on a module bracket of the battery module.
Optionally, the sensor plug connector is T-shaped, two sides of the sensor plug connector are provided with a guide structure and a buckle, and the sensor plug connector is fixedly mounted on a module bracket of the battery module through the buckle; the connection mode of the sensor plug connector and the battery management system sampling wire harness is plug connection or welding.
Optionally, a plug-in type terminal is installed in the sensor plug connector, the bottom end of the plug-in type terminal is electrically connected with the flexible thin film circuit, the plug-in type terminal is a jack or a contact pin, a sampling wire harness of the battery management system is provided with a connector, and the connector is combined with the plug-in type terminal in a plug-in mode to achieve electrical connection with the flexible thin film circuit.
Optionally, a welding type terminal is installed in the sensor plug connector, the bottom end of the welding type terminal is electrically connected with the flexible thin film circuit, a welding surface is arranged at the top of the welding type terminal, a sampling wire harness of the battery management system is provided with a connector, and the connector is welded and fixed on the welding surface to realize the electrical connection with the flexible thin film circuit.
Optionally, the welded terminal is L-shaped, the width of the top is greater than the width of the other parts, and a fixing groove is correspondingly formed in the sensor plug.
Optionally, the temperature probe is an NTC temperature probe, and is attached to the flexible thin film circuit or encapsulated in the flexible thin film circuit; the flexible thin film circuit can be made into different shapes and sizes according to the sampling position requirement of the battery module.
Optionally, a plurality of the temperature probes and corresponding flexible thin film circuits are connected to the same sensor plug, a predetermined angle is set between the plurality of the flexible thin film circuits, and the upper ends of the plurality of the flexible thin film circuits are connected to the sensor plug.
The invention provides a battery module, which comprises a plurality of battery cores and the battery module temperature sensor, wherein a temperature probe of the battery module temperature sensor and a flexible thin film circuit are arranged between the battery cores to acquire temperature signals.
Optionally, a flexible foam pad is arranged between the electric cores corresponding to the temperature probe;
the flexible thin film circuit is vertically arranged between the battery cores, or obliquely arranged or bent arranged.
Optionally, the temperature probe and the flexible thin film circuit are arranged in a central heat accumulation area of the battery module, and the temperature probe is arranged near the center of the battery core.
The invention adopting the structure has the following advantages:
the temperature sensor can conveniently arrange the temperature probe to the heat accumulation area in the battery module, so that the highest temperature of the battery module can be directly monitored; due to the pressure assembly characteristic of the module, the temperature sensor can stably keep a relative position with the battery monomer without being influenced by external factors such as vibration and the like; thereby guarantee that battery system can more accurately perceive the temperature state of battery module, reduce because of the danger that the temperature measurement deviation brought, promote the life-span and the performance of battery simultaneously.
The detachable plug connector of the temperature sensor can ensure that the implementation process is simple and easy, the universal design is convenient to realize automatic assembly and flexible redundant position arrangement, and the assembly efficiency of the module is not influenced by the arrangement of the temperature sensor.
The temperature sensor has the advantages of simple structure, obvious effect and convenient use.
Drawings
Fig. 1 is a schematic structural view of a battery module in the prior art;
fig. 2 is a perspective view of a battery module temperature sensor in embodiment 1 of the present invention;
fig. 3 is a perspective view of a battery module temperature sensor in embodiment 1 of the present invention;
fig. 4 is an enlarged view of the upper end of a temperature sensor of a battery module in embodiment 1 of the present invention;
fig. 5 is an enlarged view of the upper end of a temperature sensor of a battery module in embodiment 1 of the present invention;
fig. 6 is a perspective view of a sensor plug in embodiment 1 of the present invention;
fig. 7 is a perspective view of a sensor plug in embodiment 1 of the present invention;
fig. 8 is a perspective view of a battery module in embodiment 3 of the invention;
fig. 9 is a perspective view of a battery module in example 3 of the invention (with one end plate removed);
fig. 10 is a perspective view of a battery module temperature sensor in a state of use in a battery module according to embodiment 3 of the present invention;
FIG. 11 is an enlarged view of the slot portion of FIG. 10;
fig. 12 is a schematic diagram of connection between a plug and a sampling harness of a battery management system in embodiment 2 of the present invention.
In the figure: 1. a heat accumulation zone; 2. cell gaps; 3. the upper end of the battery core; 4. an end plate; 5. a bus bar; 6. a soldered terminal; 6-1, welding surface; 6-2. terminal lead; 7. a sensor plug; 7-1, buckling; 7-2. a first fixing groove; 7-3. a top plate; 7-4. a second fixing groove; 8. a flexible thin film circuit; 9. a temperature probe; 10. inserting a pin; 11. a jack; 12. a connector; 13. a battery management system samples a wire harness; 14. an electric core; 15. a main interface; 16. an end plate; 17. and (4) a slot.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Example 1
As shown in fig. 2, 3, 4, and 5, embodiment 1 of the present invention provides a battery module temperature sensor, which includes a temperature probe 9, a flexible thin film circuit 8, and a sensor plug 7, where the temperature probe 9 is disposed at a lower end of the flexible thin film circuit 8, an upper end of the flexible thin film circuit 8 is connected to the sensor plug 7, the sensor plug 7 is further connected to a sampling harness of a battery management system to implement signal transmission, the temperature probe 9 is disposed between battery cells of a battery module to collect a temperature signal, the sensor plug 7 is mounted and fixed on a module bracket of the battery module, and specifically, the sensor plug 7 is mounted and fixed at an end of the battery module.
The battery management system sampling harness, also called BMS sampling line, is a flexible circuit board type and can transmit the collected temperature signal to the battery management system.
The sensor plug 7 and the battery module are detachably assembled, for example, two sides of the sensor plug 7 are provided with buckles 7-1, the sensor plug is fixedly installed at the end of the battery module through the buckles 7-1, and the end of the battery module is correspondingly provided with a slot. In order to facilitate installation into the slot, guide structures, such as guide bars or guide grooves, are further disposed on both sides of the sensor plug 7.
In order to realize stable plugging, as shown in fig. 6 and 7, the sensor plug 7 is T-shaped, the buckle 7-1 is arranged at the narrower waist part, two first fixing grooves 7-2 extending from the top to the side are arranged on the sensor plug 7, and the rear ends of the first fixing grooves 7-2 are communicated with the second fixing grooves 7-4. The first fixing groove 7-2 is used for mounting the welding type terminal 6, and the second fixing groove 7-4 is used for accommodating a lead connecting structure of the welding type terminal 6 and the temperature probe 9. The middle part of the sensor plug 7 is also provided with a through hole, so that the weight of the sensor plug 7 can be reduced. The wider projections on both sides of the sensor plug 7 can form a guide structure.
The connection mode of the sensor plug 7 and the sampling wire harness of the battery management system is plug-in connection or welding, as shown in fig. 4 and 5, two welding terminals 6 are installed in the sensor plug 7 in the embodiment, the welding terminals 6 are L-shaped, the top of each welding terminal 6 is provided with a welding surface 6-1, the width of the top is larger than that of other parts, the welding operation is convenient, the lower end of each welding terminal 6 is electrically connected with the flexible thin film circuit 8, namely, the terminal lead 6-2 is electrically connected with the flexible thin film circuit 8.
The sampling wire harness of the battery management system is provided with a connector, and the connector is welded and fixed on the welding surface 6-1 to be electrically connected with the flexible thin film circuit 8.
As shown in fig. 2, the flexible thin film circuit 8 is a flexible circuit board with a very thin thickness, and the temperature probe 9 is an NTC temperature probe. The NTC temperature probe is arranged at the lower end of the flexible thin film circuit 8 and is attached to the flexible thin film circuit 8 or is packaged in the flexible thin film circuit 8, and the upper end of the flexible thin film circuit 8 is a lead which can be connected with a terminal lead 6-2 of the welding type terminal 6 in a welding mode.
Other temperature probes having thermoelectric and thermal resistance effects may be used as the temperature probe 9.
According to the monitoring needs, the flexible thin film circuit 8 can be made into different shapes and sizes according to the sampling position requirements of the battery module, and can be accurately arranged at the monitoring position. A plurality of temperature probes 9 and corresponding flexible thin film circuits 8 can be connected to the same sensor plug 7, preset angles are arranged among the flexible thin film circuits 8, the lengths of the flexible thin film circuits 8 can be unequal, the lengths of the flexible thin film circuits are correspondingly adjusted according to different monitoring positions, a certain detection range is covered, the upper ends of the flexible thin film circuits 8 are connected to the sensor plug 7, the temperature probes 9 are arranged, the temperature detection range can be enlarged, and the detection accuracy is improved.
As shown in fig. 3, two temperature probes 9 and corresponding flexible thin film circuits 8 are provided, an included angle between the two flexible thin film circuits 8 is an acute angle, and the upper ends of the two flexible thin film circuits 8 are connected to the sensor plug 7 and are connected to the terminal lead 6-2 of the soldering terminal 6 by soldering.
The battery module temperature sensor in the embodiment can conveniently arrange the temperature probe in the heat accumulation area in the battery module, so that the highest temperature of the battery module can be directly monitored; due to the pressure assembly characteristic of the module, the temperature sensor can stably keep a relative position with the battery monomer without being influenced by external factors such as vibration and the like; thereby guarantee that battery system can more accurately perceive the temperature state of battery module, reduce because of the danger that the temperature measurement deviation brought, promote the life-span and the performance of battery simultaneously.
The detachable plug connector of the battery module temperature sensor in the embodiment can ensure that the implementation process is simple and easy, the universal design is convenient to realize automatic assembly and flexible redundant position arrangement, and the assembly efficiency of the module is not influenced by the arrangement of the temperature sensor.
Example 2
The bottom end of the contact pin 10 is connected with the flexible thin film circuit 8 in a welding mode, and the top end of the contact pin protrudes. The sensor plug 7 may be provided with a slot in which the top of the pin 10 is located and into which the connector 12 can be inserted. And the battery management system sampling wire harness is more convenient to disassemble and assemble by adopting a plug-in combination mode.
The other structure of the battery module temperature sensor in this embodiment 2 is the same as that of embodiment 1, and a description thereof will not be repeated.
Example 3
As shown in fig. 8, 9, and 10, this embodiment provides a battery module, which includes a plurality of battery cells 14, and further includes the battery module temperature sensor described in embodiment 1 or embodiment 2, where a temperature probe 9 and a flexible thin film circuit 8 of the battery module temperature sensor are disposed between the battery cells 14 to collect temperature signals.
And a sensor plug 7 of the battery module temperature sensor is connected with a sampling wire harness 13 of a battery management system to realize the electric connection with the flexible thin film circuit 8. The battery module is provided with a main interface 15, the battery management system sampling wire harness 13 is connected to the main interface 15, and finally signals are transmitted to the outside through the main interface 15.
A flexible foam pad can be arranged between the battery cores 14 corresponding to the temperature probes 9 to prevent the temperature probes 9 from crushing the battery cores 14.
The sensor plugs 7 may be mounted and fixed at the upper end and/or the left and right ends of the battery module, as shown in fig. 9, and the sensor plugs 7 are mounted and fixed at the left and right ends of the battery module. Both ends about electric core 14 all are provided with end plate 16, and end plate 16 is a part of module support, is provided with slot 17 on the end plate 16, as shown in fig. 11, and the shape of slot 17 and the shape adaptation of sensor bayonet joint 7, especially correspond buckle 7-1 and be provided with two archs, and sensor bayonet joint 7 can obtain reliably fixedly in inserting slot 17.
After the sensor plug connector 7 is inserted into the slot 17, the buckle 7-1 can be clamped with the protrusion, if the sensor plug connector 7 is required to be disassembled, the buckles 7-1 on the two sides need to be pinched to separate the buckle 7-1 from the protrusion, and then the sensor plug connector 7 can be pulled out.
Typically, the flexible thin film circuit 8 is disposed vertically between the cells 14. The detection device can be obliquely arranged or bent as required, and even bent to form a special pattern so as to improve the detection accuracy.
Preferably, the temperature probe 9 and the flexible thin film circuit 8 are disposed at a central heat accumulation region of the battery module, where the temperature of the battery module is highest. The temperature probe 9 is arranged near the center of the battery cell 14, and the position is the highest position of the battery cell temperature, so that the central temperature of the battery module can be directly monitored.
The structure of the battery module temperature sensor in this embodiment 3 is the same as that in embodiment 1 or embodiment 2, and a description thereof will not be repeated.
While the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood by those skilled in the art that the foregoing detailed description is for the purpose of better explaining the present invention, and the scope of the present invention should be determined by the scope of the appended claims.
Claims (10)
1. The utility model provides a battery module temperature sensor, its characterized in that, includes temperature probe, flexible thin film circuit and sensor bayonet joint, temperature probe sets up the lower extreme of flexible thin film circuit, the upper end of flexible thin film circuit with the sensor bayonet joint is connected, the sensor bayonet joint still with battery management system sampling pencil be connected and realize signal transmission, temperature probe sets up gathers temperature signal between the electric core of battery module, the installation of sensor bayonet joint is fixed on the module support of battery module.
2. The battery module temperature sensor according to claim 1, wherein the sensor plug is T-shaped, and two sides of the sensor plug are provided with a guide structure and a buckle, and the sensor plug is fixedly mounted on a module bracket of the battery module through the buckle; the connection mode of the sensor plug connector and the battery management system sampling wire harness is plug connection or welding.
3. The battery module temperature sensor according to claim 1, wherein a plug-in terminal is installed in the sensor plug, the bottom end of the plug-in terminal is electrically connected with the flexible thin film circuit, the plug-in terminal is a jack or a pin, the battery management system sampling harness is provided with a connector, and the connector is combined with the plug-in terminal in a plug-in manner to realize electrical connection with the flexible thin film circuit.
4. The battery module temperature sensor according to claim 1, wherein a welding terminal is installed in the sensor plug, the bottom end of the welding terminal is electrically connected with the flexible thin film circuit, a welding surface is arranged at the top of the welding terminal, the battery management system sampling wire harness is provided with a connector, and the connector is welded and fixed on the welding surface to realize the electrical connection with the flexible thin film circuit.
5. The battery module temperature sensor according to claim 4, wherein the welded terminal has an L-shape, the width of the top of the welded terminal is greater than the width of the other parts of the welded terminal, and the sensor plug is correspondingly provided with a fixing groove.
6. The battery module temperature sensor according to claim 1, wherein the temperature probe is an NTC temperature probe, is attached to the flexible thin film circuit, or is encapsulated in the flexible thin film circuit; the flexible thin film circuit can be made into different shapes and sizes according to the sampling position requirement of the battery module.
7. The battery module temperature sensor according to claim 1, wherein the plurality of temperature probes and the corresponding flexible thin film circuits are connected to the same sensor plug, a predetermined angle is provided between the plurality of flexible thin film circuits, and upper ends of the plurality of flexible thin film circuits are connected to the sensor plug.
8. A battery module comprises a plurality of battery cells and is characterized by further comprising the battery module temperature sensor in any one of claims 1-7, wherein a temperature probe and a flexible thin film circuit of the battery module temperature sensor are arranged between the battery cells to acquire temperature signals.
9. The battery module according to claim 8, wherein a flexible foam pad is arranged between the battery cells corresponding to the temperature probe;
the flexible thin film circuit is vertically arranged between the battery cores, or obliquely arranged or bent arranged.
10. The battery module of claim 8, wherein the temperature probe and flexible thin film circuit are disposed in a central heat collection zone of the battery module, and the temperature probe is disposed near a center of the cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010748114.XA CN111816946A (en) | 2020-07-30 | 2020-07-30 | Battery module temperature sensor and battery module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010748114.XA CN111816946A (en) | 2020-07-30 | 2020-07-30 | Battery module temperature sensor and battery module |
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| Publication Number | Publication Date |
|---|---|
| CN111816946A true CN111816946A (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010748114.XA Pending CN111816946A (en) | 2020-07-30 | 2020-07-30 | Battery module temperature sensor and battery module |
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| CN (1) | CN111816946A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258157A (en) * | 2021-07-16 | 2021-08-13 | 江苏时代新能源科技有限公司 | Battery and electric device |
| CN115360449A (en) * | 2022-09-15 | 2022-11-18 | 厦门海辰储能科技股份有限公司 | Detection tool, temperature checking method and energy storage device |
-
2020
- 2020-07-30 CN CN202010748114.XA patent/CN111816946A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258157A (en) * | 2021-07-16 | 2021-08-13 | 江苏时代新能源科技有限公司 | Battery and electric device |
| CN113258157B (en) * | 2021-07-16 | 2021-11-02 | 江苏时代新能源科技有限公司 | Battery and electric device |
| CN115360449A (en) * | 2022-09-15 | 2022-11-18 | 厦门海辰储能科技股份有限公司 | Detection tool, temperature checking method and energy storage device |
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