CN211740441U

CN211740441U - Battery temperature acquisition device and battery module with same

Info

Publication number: CN211740441U
Application number: CN202020702129.8U
Authority: CN
Inventors: 畅志远; 杜肖源; 张水田; 李新建; 杨培; 刘明明
Original assignee: China Aviation Lithium Battery Co Ltd; China Aviation Lithium Battery Research Institute Co Ltd
Current assignee: Avic Innovation Technology Research Institute Jiangsu Co ltd; China Aviation Lithium Battery Co Ltd; China Lithium Battery Technology Co Ltd; CALB Technology Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-10-23
Anticipated expiration: 2030-04-30

Abstract

The utility model relates to the technical field of batteries, a battery temperature acquisition device and have its battery module is proposed. The battery temperature acquisition device is used for being arranged between the end plate and the battery or between two adjacent batteries, the battery temperature acquisition device comprises a supporting part and at least one temperature measurement component, the temperature measurement component comprises a temperature sensor, and the temperature sensor is arranged on the supporting part. This disclosed battery temperature acquisition device has shortened the heat transfer route between the electric core of temperature sensor and battery through setting up between end plate and battery, perhaps between two adjacent batteries to improve the accuracy of temperature sensor temperature acquisition, solved the lower problem of the temperature acquisition mode accuracy among the prior art.

Description

Battery temperature acquisition device and battery module with same

Technical Field

The utility model relates to a battery technology field especially relates to a battery temperature acquisition device and have its battery module.

Background

The existing module temperature acquisition position is located at the top of the battery module (a bus bar or a battery top cover plate), but under different working conditions and use conditions, the upper part of the battery module and the lower part of the battery module have larger temperature difference. For example, in the charging and discharging processes of the battery module, and under the condition that the liquid cooling system at the bottom of the battery module is opened, the temperature of the upper part of the battery module is highest, and the temperature of the lower part of the battery module, which is in contact with the liquid cooling plate, is lowest; when the battery module is heated at a low temperature, the temperature of the bottom of the battery module is highest, and the temperature of the top of the battery module is lowest. The normal working temperature of the battery module is between-30 ℃ and 60 ℃, and the working efficiency and the service life of the battery module are reduced when the temperature exceeds the temperature range. The existing battery module only collects the upper temperature of the battery module and cannot monitor the whole temperature distribution state of the battery module. Due to the lack of temperature data, the battery system is not beneficial to accurate thermal management of the thermal management system, and the service efficiency and the service life of the battery system are adversely affected.

And the current battery module temperature acquisition mode is: the busbar is connected with battery utmost point post, and sheetmetal one end is connected with the busbar, and the other end forms the parcel structure, and temperature sensor is located the parcel structure, fills by the heat conduction glue between sensor and the parcel structure (sensor and parcel structure direct contact not). The resulting heat conduction path is: cell → conductive strip → battery post → busbar → metal sheet → thermal conductive adhesive → temperature sensor.

In the prior art, the heat conduction path between the temperature sensor and the inside (electric core) of the battery is too long, so that the accuracy of temperature acquisition is reduced. On the other hand, the bus bar also generates heat when a current flows, resulting in a further increase in temperature acquisition error.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery temperature acquisition device and have its battery module to solve the lower problem of temperature acquisition mode accuracy among the prior art.

According to the utility model discloses a first aspect provides a battery temperature acquisition device for set up between end plate and battery, or between two adjacent batteries, battery temperature acquisition device includes:

a support portion;

at least one temperature measurement subassembly, temperature measurement subassembly includes temperature sensor, and temperature sensor sets up on the supporting part.

The utility model discloses a battery temperature acquisition device is through setting up between end plate and battery, perhaps between two adjacent batteries, has shortened the heat transfer route between the electric core of temperature sensor and battery to improve the accuracy of temperature sensor temperature acquisition, solved the lower problem of the temperature acquisition mode accuracy among the prior art.

According to the utility model discloses a second aspect provides a battery module, including foretell battery temperature acquisition device, end plate and battery.

The utility model discloses a battery module is through setting up battery temperature collection system between end plate and battery, perhaps between two adjacent batteries, has shortened the heat transfer route between the electric core of temperature sensor and battery to the accuracy of temperature sensor temperature acquisition has been improved.

Drawings

Various objects, features and advantages of the present disclosure will become more apparent from the following detailed description of preferred embodiments thereof, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the disclosure and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:

fig. 1 is an exploded structural view illustrating a battery module according to an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating an exploded structure of a battery temperature acquisition device according to a first exemplary embodiment;

FIG. 3 is a schematic diagram illustrating a partially exploded view of a battery temperature collection assembly according to one exemplary embodiment;

FIG. 4 is a schematic diagram illustrating an exploded structure of a battery temperature acquisition device according to a second exemplary embodiment;

fig. 5 is an exploded structural view illustrating a battery temperature collecting apparatus according to a third exemplary embodiment.

The reference numerals are explained below:

1. an end plate; 2. a battery; 3. a bus bar; 4. a battery cover plate; 5. a battery post;

10. a support portion; 11. accommodating grooves; 111. a bottom surface; 12. an accommodating through-hole; 20. a temperature sensor; 21. a first connector; 30. a circuit board; 31. a first surface; 32. a second surface; 33. a protrusion; 34. a heat insulating part; 40. a heat conductive sheet; 50. a clip frame; 51. an accommodation hole; 60. a cushion pad; 70. a low pressure collection assembly; 71. a second connector; 72. a third connector; 80. an insulating film.

Detailed Description

Exemplary embodiments that embody features and advantages of the present disclosure are described in detail below in the specification. It is to be understood that the disclosure is capable of various modifications in various embodiments without departing from the scope of the disclosure, and that the description and drawings are to be regarded as illustrative in nature, and not as restrictive.

In the following description of various exemplary embodiments of the disclosure, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the disclosure may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present disclosure. Moreover, although the terms "over," "between," "within," and the like may be used in this specification to describe various example features and elements of the disclosure, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples in the figures. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures in order to fall within the scope of this disclosure. The battery in this disclosure includes a cell and a casing, the cell being located inside the casing.

An embodiment of the utility model provides a battery temperature acquisition device, please refer to fig. 1 to 5, battery temperature acquisition device is used for setting up between end plate 1 and battery 2, or between two adjacent batteries 2, and battery temperature acquisition device includes: a support part 10; at least one temperature measuring component, the temperature measuring component includes temperature sensor 20, and temperature sensor 20 sets up on supporting part 10.

The utility model discloses a battery temperature collection system of embodiment is through setting up between end plate 1 and battery 2, perhaps between two adjacent batteries 2, has shortened the heat transfer route between the electric core of temperature sensor 20 and battery 2 to improve the accuracy of temperature sensor 20 temperature acquisition, solved the lower problem of the temperature acquisition mode accuracy among the prior art.

In one embodiment, the battery temperature collecting device may be located between the end plate 1 of the battery module and the casing of the battery 2, or between the casings of two adjacent batteries 2, that is, the temperature sensor 20 directly collects the temperature transmitted from the battery core to the casing, and the heat transfer path is short and the stability and accuracy are high.

In one embodiment, the end plate 1 is disposed opposite to the large face of the battery 2, i.e., the battery temperature collecting means may be disposed between the end plate 1 and the large face of the battery 2. The large surfaces of two adjacent batteries 2 are arranged oppositely, and the temperature sensor 20 directly acquires the large surface temperature of the battery 2, namely the temperature of the large surface of the shell.

In one embodiment, the supporting portion 10 is interposed between the end plate 1 and the large surface of the battery 2, or between two adjacent batteries 2, and the probe of the temperature sensor 20 may directly contact the large surface of the battery 2, or may contact the large surface of the battery 2 through another introducing member. Wherein the support part 10 is a support plate.

In one embodiment, the temperature sensor 20 is at least one, and the specific number thereof may be arranged according to actual use requirements, and is not limited herein, for example, one temperature sensor 20 may be arranged at a position close to the upper surface and the lower surface of the support portion 10, and is used for acquiring the temperatures of the top and the bottom of the battery 2, respectively, and at least one temperature sensor 20 may be arranged at a middle position of the support portion 10, and is used for acquiring the temperature of the middle position of the battery 2.

In one embodiment, as shown in fig. 2, the battery temperature collecting apparatus further includes: the circuit board 30, the circuit board 30 sets up on supporting part 10, and temperature sensor 20 is connected with the circuit electricity of circuit board 30 to the temperature information transmission to the battery management system who will gather through circuit board 30, and temperature sensor 20 has set up on supporting part 10 through circuit board 30, and the heat on the supporting part 10 can not direct conduction to temperature sensor 20 on, has avoided the accuracy that the heat on the supporting part 10 influences temperature sensor 20 and gathers the temperature promptly.

In one embodiment, as shown in fig. 2 to 4, the supporting portion 10 is provided with a receiving groove 11, and the circuit board 30 is located in the receiving groove 11; the circuit board 30 includes a first surface 31 and a second surface 32, the first surface 31 faces the bottom surface 111 of the receiving cavity 11 and is spaced from the bottom surface 111, and the second surface 32 faces the opening of the receiving cavity 11 and is located below the opening. The circuit board 30 is located inside the accommodating groove 11, the first surface 31 of the circuit board 30 is not in direct contact with the bottom surface 111 of the accommodating groove 11, and the second surface 32 is not in direct contact with the battery 2, so that heat transfer from the supporting portion 10 and the battery 2 to the circuit board 30 is avoided, damage to the circuit board 30 can be avoided, and accuracy of temperature acquisition of the temperature sensor 20 is not affected.

In one embodiment, as shown in fig. 2, the receiving groove 11 has an engaging position and two end portions, and there is one temperature sensor 20 at each of the engaging position and the two end portions, and there may be one temperature sensor 20 between the engaging position and the two end portions, that is, the number of the temperature sensors 20 may be 5, but in actual use, the shape of the receiving groove 11, the number and the arrangement positions of the temperature sensors 20 may be set according to needs, and this is not limited herein.

In one embodiment, as shown in fig. 4 and 5, a protrusion 33 is disposed between the first surface 31 and the bottom surface 111 to isolate air between a portion of the first surface 31 and the bottom surface 111; alternatively, a heat insulating portion 34 is provided between the first surface 31 and the bottom surface 111. The provision of the projection 33 or the heat insulating portion 34 also mainly protects the circuit board 30 from a large amount of heat transfer to the circuit board 30.

In one embodiment, as shown in fig. 4, a plurality of protrusions 33 are disposed in the receiving groove 11, and the plurality of protrusions 33 are spaced apart from each other, so as to support the circuit board 30 in the receiving groove 11, and there is a gap between the circuit board 30 and the bottom surface 111 of the receiving groove 11, and the gap is air-isolated.

In one embodiment, the second surface 32 is provided with a heat insulation portion 34, and the heat insulation portions 34 are all located in the accommodating groove 11, so that the battery 2 and the support portion 10 are not affected on the basis of heat insulation.

In one embodiment, as shown in fig. 5, the first surface 31 and the second surface 32 are provided with the thermal insulation portion 34, the thermal insulation portion 34 between the first surface 31 and the bottom surface 111 may be disposed on the first surface 31 or the bottom surface 111, and the thermal insulation portion 34 is adapted to the circuit board 30, that is, the thermal insulation portion 34 may be combined according to the shape of the circuit board 30, as shown in fig. 5, the thermal insulation portion 34 corresponding to the first surface 31 or the second surface 32 is formed by combining a plurality of thermal insulation portions 34.

In one embodiment, circuit board 30 is a flexible circuit board. A Flexible Printed Circuit (FPC) is a highly reliable and excellent Flexible printed circuit board made of a polyimide or polyester film as a base material, and has the characteristics of high wiring density, light weight, thin thickness, and good bending property. The flexible circuit board both sides are provided with arch 33 or thermal-insulated portion 34 and are used for with FPC and battery surface thermal insulation, prevent that the battery surface heat outside the temperature monitoring area corresponding with temperature sensor 20 from leading to temperature sensor 20 through FPC conduction, thereby influence the accuracy of temperature sensor collection temperature, also prevent that the heat of battery from leading to FPC, make signal transmission copper line temperature rise in the FPC, cause the circuit resistance to rise, thereby influence the temperature acquisition precision, and prevent at extreme operating mode, such as overcharge, short circuit, etc., battery high temperature damages FPC, make unable timely with temperature data transfer for battery management system, can't play the high temperature early warning effect.

In one embodiment, the temperature sensor 20 is an NTC Thermistor (NTC), the circuit board 30 is an FPC, and the NTC is fixed to the FPC by soldering and transmits temperature information through the FPC. The FPC has an insulating film which is stuck at a position corresponding to the temperature sensor 20 and plays a role of insulation and isolation. Since the FPC path (shape) can be designed at will, the position of the NTC on the FPC can be set at will.

In one embodiment, as shown in fig. 3, the thermometric assembly further comprises: the conducting strip 40, the both sides of conducting strip 40 contact with temperature sensor 20 and battery 2 respectively, and temperature sensor 20 contacts through conducting strip 40 and battery 2 promptly, and conducting strip 40 is greater than the probe with heat transfer to temperature sensor 20, considers that the area of conducting strip 40 is greater than, not only can guarantee that temperature sensor 20 can gather temperature information, and has expanded the scope of gathering (the heat on the conducting strip 40 derives from a relatively great face). Wherein the heat conductive sheet 40 is provided in one-to-one correspondence with the temperature sensors 20, and when a plurality of temperature sensors 20 are provided, each temperature sensor 20 is in contact with the battery 2 through the corresponding heat conductive sheet 40.

In one embodiment, the heat conducting sheet 40 is disposed on the circuit board 30, and the heat conducting sheet 40 can protect the circuit board 30 based on heat conduction, especially when the circuit board 30 is a flexible circuit board.

In one embodiment, as shown in fig. 3, the supporting portion 10 is provided with a receiving through hole 12, and the thermometric assembly further comprises: the square frame 50 is arranged in the accommodating through hole 12, one side of the square frame 50 is attached to one side of the circuit board 30 away from the probe of the temperature sensor 20, the accommodating hole 51 is formed in the square frame 50, and the part of the temperature sensor 20 protruding out of the circuit board 30 is positioned in the accommodating hole 51; the buffer pad 60 is arranged in the accommodating through hole 12, and one side of the buffer pad 60 is attached to the other side of the square-shaped frame 50 away from the circuit board 30; wherein, the other side of the buffer pad 60 away from the frame 50 is used for being jointed with the end plate 1 or the battery 2, and the buffer pad 60 is used for providing the force for pressing the temperature sensor 20 on the battery 2. The frame 50 can protect the temperature sensor 20 and also protect the circuit board 30, and the buffer pad 60 can ensure that the temperature sensor 20 can be attached to the battery 2 when the end plate 1 and the battery 2 (or two batteries 2) are pressed against the battery temperature collecting device.

In one embodiment, when the temperature measuring assembly is plural, each temperature sensor 20 has a plurality of accommodating through holes 12 corresponding to the frame 50 and the cushion 60, and the frame 50 and the cushion 60 are disposed in the corresponding accommodating through hole 12.

In one embodiment, when the temperature measuring assembly is plural, the plurality of temperature sensors 20 may share one heat conductive sheet 40.

In one embodiment, when the temperature sensor 20 is in contact with the battery 2 via the heat-conducting sheet 40, the frame 50 and the heat-conducting sheet 40 are respectively located on two sides of the circuit board 30, so that the circuit board 30 can be protected.

In one embodiment, the receiving through-hole 12 is located on the receiving groove 11, and the outer surface of the buffer pad 60 protrudes out of the receiving through-hole 12 when not compressed, so that a pressure can be provided after the buffer pad 60 is compressed to ensure that the heat-conducting sheet 40 is tightly attached to the battery 2.

In one embodiment, the heat conducting sheet 40 is a thin aluminum plate, which plays a role of reinforcement, and prevents the FPC at the NTC position from bending and the like under the action of external force, which causes abnormal welding resistance or damage to the sensor, thereby affecting the NTC acquisition accuracy. The thin aluminum plate has high heat conductivity coefficient and very thin thickness, so that the thermal resistance is very small, and the influence on the acquisition precision is very small. The thin aluminum plate is tightly attached to the large surface of the battery 2, and the heat of the battery is transferred to the NTC through the thin aluminum plate and the insulation film of the FPC, so that the temperature of the large surface of the battery is collected. Since the thin aluminum plate and the FPC insulating film (polyimide film, PI) between the NTC and the large surface of the battery are thin (for example, 0.2mm), the thermal resistance is small and the influence on the temperature acquisition accuracy is small. The frame 50 is made of epoxy resin, the NTC is wrapped by the frame 50 to prevent the NTC from being touched and extruded to influence the acquisition precision and accuracy, and the frame 50 and the thin aluminum plate together play a role in preventing the FPC at the NTC from being bent. The clip cushion 60 is provided on the upper portion of the clip frame 50, and the compression amount of the cushion 60 is configured to obtain a desired pressure, thereby preventing an excessive or insufficient pressure due to manufacturing errors of the support portion 10, the clip frame 50, and the like. The thickness of the buffer pad 60 is set to protrude the surface of the support part 10, when the battery temperature collecting device is pressed between the end plate 1 and the battery 2, or between the battery 2 and the battery 2, the buffer pad 60 is pressed by the pressure to press the NTC on the battery 2, so as to improve the accuracy and response speed of temperature collection, and the temperature measured by the temperature sensor 20 is closer to the temperature of the large surface of the battery.

In one embodiment, as shown in fig. 2, 4 and 5, the battery temperature collecting device further includes an insulating film 80, the insulating film 80 being located on a side of the support 10 away from the heat conductive sheet 40 for being disposed between the support 10 and the end plate 1 or between the support 10 and the battery 2, wherein the insulating film 80 is plural.

In one embodiment, the battery temperature collecting device is sandwiched between the end plate 1 and the battery 2, or between two adjacent batteries 2, that is, two sides of the supporting portion 10 are respectively attached to the end plate 1 and the battery 2, or two batteries 2, so that the temperature sensor 20, the circuit board 30, the heat conducting sheet 40, the frame 50 and the cushion pad 60 are finally located in the supporting portion 10, and the cushion pad 60 and the heat conducting sheet 40 are respectively attached to the end plate 1 and the battery 2, or respectively attached to two batteries 2.

An embodiment of the present invention further provides a battery module, please refer to fig. 1, the battery module includes the above-mentioned battery temperature collecting device, the end plate 1 and the battery 2.

The utility model discloses a battery module of embodiment is through setting up battery temperature collection system between end plate 1 and battery 2, perhaps between two adjacent batteries 2, has shortened the heat transfer route between the electric core of temperature sensor 20 and battery 2 to the accuracy of temperature sensor 20 temperature acquisition has been improved.

In one embodiment, as shown in fig. 1, a first connector 21 is disposed on the battery temperature collecting device, the temperature sensor 20 is electrically connected to the first connector 21, and the battery module further includes: the low-voltage acquisition assembly 70 is arranged on the battery 2, a second connector 71 and a third connector 72 are arranged on the low-voltage acquisition assembly 70, the second connector 71 is electrically connected with the first connector 21, and the third connector 72 is used for being electrically connected with a battery management system, so that temperature information acquired by the temperature sensor 20 is transmitted to the battery management system.

In one embodiment, the bus bar 3 is disposed on the battery cover 4 and connected to the battery post 5, and the plurality of batteries 2 are disposed adjacent to each other.

In one embodiment, the first connector 21 is electrically connected to the temperature sensor 20 by connecting to a wire on the circuit board 30. The temperature sensor 20 is connected with the first connector 21 through the circuit board 30, the first connector 21 is connected with the second connector 71 to transmit temperature information to the low voltage acquisition assembly 70, the low voltage acquisition assembly 70 is connected with the battery management system through the third connector 72 to output voltage (voltage which can be used for acquiring the battery module by the low voltage acquisition assembly 70) and temperature information of the battery module to the battery management system, and therefore temperature monitoring of the battery module is achieved.

In one embodiment, the battery temperature collecting device is located between the end plate 1 and the battery 2 or between the battery 2 and the battery 2, at least one temperature sensor 20 is arranged on the battery temperature collecting device, and the temperature sensor 20 is in thermal conduction with the large surface of the battery 2 and is used for collecting the large surface temperature of the battery. Because the battery shell at the large part of the battery is directly contacted with the battery core, the temperature at the large part of the battery is closer to the temperature inside the battery (the battery core), so that the temperature acquired by the temperature sensor 20 can more accurately reflect the real temperature inside the battery module, and the service efficiency and the service life of the battery module are favorably ensured.

In one embodiment, the temperature sensor 20 may be disposed at any position of the support 10, thereby achieving temperature collection at any position on the large surface of the battery. The battery module receives charge-discharge operating mode, heat dissipation condition, thermal management system's influence in the course of the work, and battery module upper portion and lower part have great difference in temperature, only measure battery module upper portion or battery module lower part temperature, can't reflect the whole temperature interval of battery module all, are unfavorable for effectively managing the temperature of battery module. The battery temperature acquisition device in this embodiment can acquire the temperature of any position on the large face of any battery 2 in the battery module. The temperature of the battery module with the highest temperature and the lowest temperature under different working conditions can be determined in a finite element or prototype measurement mode, and the temperature sensor 20 is arranged at the position, so that the highest temperature and the lowest temperature of the battery module under any working conditions can be measured, and the effective management of the temperature of the battery module is realized.

The utility model discloses a battery module does not have other parts that generate heat between temperature sensor and the battery case, has avoided the influence of the part that generates heat to temperature acquisition. Because the battery shell at the large-surface part of the battery is directly contacted with the battery core, the temperature at the large-surface part of the battery is closer to the temperature inside the battery, so that the temperature acquired by the temperature sensor can more accurately reflect the real temperature inside the battery unit, and the service efficiency and the service life of the battery module are favorably ensured. The temperature sensor can gather the temperature of the large-face optional position of the battery, and can gather the temperature of a plurality of positions simultaneously, and the temperature distribution interval (highest and lowest temperature) of the battery module under various working conditions is beneficial to the battery management system to carry out more accurate control on the temperature of the battery.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and exemplary embodiments be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A battery temperature acquisition device, for being disposed between an end plate (1) and a battery (2), or between two adjacent batteries (2), the battery temperature acquisition device comprising:

a support (10);

at least one temperature measurement component, temperature measurement component includes temperature sensor (20), temperature sensor (20) set up on supporting part (10).

2. The battery temperature acquisition device of claim 1, further comprising:

a circuit board (30), the circuit board (30) being disposed on the support portion (10), the temperature sensor (20) being electrically connected with a line of the circuit board (30).

3. The battery temperature collecting device according to claim 2, wherein a receiving groove (11) is provided on the supporting portion (10), and the circuit board (30) is located in the receiving groove (11);

the circuit board (30) comprises a first surface (31) and a second surface (32), the first surface (31) faces to the bottom surface (111) of the accommodating groove (11) and is spaced from the bottom surface (111), and the second surface (32) faces to the opening of the accommodating groove (11) and is located below the opening.

4. The battery temperature acquisition device according to claim 3, characterized in that a protrusion (33) is provided between the first surface (31) and the bottom surface (111) to isolate a portion of the first surface (31) from air between the bottom surface (111); or a heat insulation part (34) is arranged between the first surface (31) and the bottom surface (111).

5. The battery temperature acquisition device according to claim 4, wherein the second surface (32) is provided with the thermal insulation portions (34), and the thermal insulation portions (34) are each located within the accommodation groove (11).

6. The battery temperature acquisition device according to any one of claims 2 to 5, wherein the circuit board (30) is a flexible circuit board.

7. The battery temperature acquisition device of any one of claims 2 to 5, wherein the temperature measurement assembly further comprises:

and the two sides of the heat conducting sheet (40) are respectively contacted with the temperature sensor (20) and the battery (2).

8. The battery temperature acquisition device according to any one of claims 2 to 5, wherein the support portion (10) is provided with a receiving through hole (12), and the temperature measurement assembly further comprises:

the clip frame (50) is arranged in the accommodating through hole (12), one side of the clip frame (50) is attached to one side, away from the probe of the temperature sensor (20), of the circuit board (30), an accommodating hole (51) is formed in the clip frame (50), and the part, protruding out of the circuit board (30), of the temperature sensor (20) is located in the accommodating hole (51);

the buffer pad (60) is arranged in the accommodating through hole (12), and one side of the buffer pad (60) is attached to the other side, away from the circuit board (30), of the square frame (50);

wherein the other side of the buffer pad (60) far away from the square-shaped frame (50) is used for being jointed with the end plate (1) or the battery (2), and the buffer pad (60) is used for providing a force for the temperature sensor (20) to be pressed on the battery (2).

9. A battery module characterized by comprising the battery temperature acquisition apparatus according to any one of claims 1 to 8, an end plate (1), and a battery (2).

10. The battery module according to claim 9, wherein a first connector (21) is provided on the battery temperature collection device, the temperature sensor (20) is electrically connected to the first connector (21), and the battery module further comprises:

subassembly (70) are gathered to low pressure, low pressure gather subassembly (70) and set up on battery (2), be provided with second connector (71) and third connector (72) on low pressure gather subassembly (70), second connector (71) with first connector (21) electricity is connected, third connector (72) are used for being connected with the battery management system electricity.