Battery temperature sensing support device, battery pack and electric vehicle

Abstract

The application belongs to the technical field of batteries, and provides a battery temperature sensing support device, a battery pack and an electric vehicle. The battery temperature sensing support device comprises a battery cell, a temperature sensing support and an FPC flexible circuit board. The temperature sensing support is installed on the upper surface of the battery cell. The temperature sensing support comprises a first extension part, an intermediate part and a second extension part connected in sequence. The first extension part and the second extension part are fixedly connected with the upper surface of the battery cell. The upper surface of the intermediate part is provided with a temperature sensing groove. The FPC flexible circuit board is installed on the side of the temperature sensing support away from the battery cell. The edge of the FPC flexible circuit board is provided with a temperature sensing channel. The end of the temperature sensing channel away from the FPC flexible circuit board is provided with a temperature sensing probe. The temperature sensing probe passes through the temperature sensing groove and is in contact with the upper surface of the battery cell. The application solves the technical problems that the temperature sensing probe is directly connected with the body of the battery cell, the arrangement is inconvenient, the positioning is inaccurate, the connection is unreliable, and the battery pole welding and the explosion-proof valve work are easily disturbed.

Description

Technical Field

[0001] This application belongs to the field of battery technology, and specifically relates to a battery temperature sensing bracket device, a battery pack, and an electric vehicle. Background Technology

[0002] With the rapid development of the new energy market, the demand for power and energy storage battery packs is increasing, and therefore battery safety is receiving more and more attention. As a result, battery packs usually need to be equipped with temperature acquisition components on the integrated busbar to collect and monitor the temperature of individual battery cells in order to ensure the safety of the battery pack.

[0003] However, current mainstream temperature acquisition components mainly collect the temperature of the battery terminals connected to the battery. There is a significant temperature gradient between the battery terminals and the battery cell itself, especially under conditions such as fast charging and high-rate discharging, where the temperature difference can reach more than 15°C. This cannot accurately reflect the temperature of the battery cell itself, which can easily lead to deviations in the battery management system's (BMS) judgment of the battery's thermal state, creating a potential risk of thermal runaway, and affecting battery cycle life and energy efficiency optimization.

[0004] To address the aforementioned temperature acquisition deviation issue, the industry urgently needs to achieve direct contact between the temperature sensor and the battery cell to measure the cell's temperature. However, how to achieve a reasonable arrangement, accurate positioning, and reliable fixation of the temperature sensor and the battery cell, while also ensuring ease of installation, cost control, and without affecting the welding of the battery terminals or the normal operation of the explosion-proof valve, has become a pressing technical challenge. Summary of the Invention

[0005] To address the aforementioned issues, this application proposes a battery temperature sensing bracket device, comprising a battery cell, a temperature sensing bracket, and an FPC flexible circuit board. The temperature sensing bracket is mounted on the upper surface of the battery cell. The temperature sensing bracket includes a first extension, a middle extension, and a second extension connected in sequence, both of which are fixedly connected to the upper surface of the battery cell. A temperature sensing groove is provided on the upper surface of the middle extension. The FPC flexible circuit board is installed on the side of the temperature sensing bracket away from the battery cell. A temperature sensing channel is provided at the edge of the FPC flexible circuit board. A temperature sensing probe is installed at the end of the temperature sensing channel away from the FPC flexible circuit board. The temperature sensing probe passes through the temperature sensing groove and contacts the upper surface of the battery cell.

[0006] Furthermore, a notch is provided on the upper surface of the FPC flexible circuit board, and the notch is located on the side of the temperature sensing channel close to the FPC flexible circuit board; the notch is L-shaped.

[0007] Furthermore, the temperature sensing channel is arc-shaped or wavy.

[0008] Furthermore, the upper surface of the middle section is provided with injection holes, which are directly opposite the explosion-proof valve of the battery cell.

[0009] Furthermore, the battery temperature sensing bracket device also includes a temperature sensing protective cover; a mounting boss is provided on the side of the temperature sensing groove, the temperature sensing protective cover is installed in the temperature sensing groove, and the mounting boss is engaged with the temperature sensing protective cover.

[0010] Furthermore, the temperature-sensing bracket and temperature-sensing protective cover are made of insulating plastic material.

[0011] Furthermore, the temperature sensing groove is filled with thermally conductive structural adhesive.

[0012] Furthermore, the upper surfaces of the first extension and the second extension are provided with positioning grooves, which are fitted onto the outer side of the electrode post of the battery cell; adhesive is applied between the first extension and the second extension and the battery cell.

[0013] A battery pack includes a housing and a battery management system. The housing contains battery cells and the battery management system, and the battery cells are equipped with the aforementioned battery temperature sensing bracket device. The temperature sensing probe of the battery temperature sensing bracket device is electrically connected to the battery management system.

[0014] An electric vehicle includes a frame and a motor, with the motor and the aforementioned battery pack mounted on the frame, and the battery pack being electrically connected to the motor.

[0015] Beneficial effects: 1. The battery temperature sensing bracket device of the present invention includes a battery cell, a temperature sensing bracket, and an FPC flexible circuit board. The temperature sensing bracket is installed on the upper surface of the battery cell. The temperature sensing bracket includes a first extension, a middle part, and a second extension connected in sequence. Both the first extension and the second extension are fixedly connected to the upper surface of the battery cell. A temperature sensing groove is provided on the upper surface of the middle part. By providing a temperature sensing groove on the upper surface of the middle part, the technical problems of inconvenient arrangement, inaccurate positioning, unreliable connection, and easy interference with electrode welding and explosion-proof valve operation when the temperature sensing probe is directly connected to the body of the battery cell are solved.

[0016] 2. The FPC flexible circuit board of the battery temperature sensing bracket device of the present invention is installed on the side of the temperature sensing bracket away from the battery cell. A temperature sensing channel is provided at the edge of the FPC flexible circuit board, and a temperature sensing probe is installed at the end of the temperature sensing channel away from the FPC flexible circuit board. The temperature sensing probe passes through the temperature sensing groove and contacts the upper surface of the battery cell. By having the temperature sensing probe pass through the temperature sensing groove and contact the upper surface of the battery cell, the temperature of the battery cell can be directly measured, which completely solves the problem of temperature difference deviation in the prior art when collecting the temperature of the battery cell, greatly improves the accuracy of temperature acquisition, truly reflects the temperature of the battery cell, provides accurate data for the BMS, effectively avoids the risk of thermal runaway, and optimizes the battery cycle life and energy efficiency, especially suitable for high temperature difference conditions such as fast charging and high-rate discharge.

[0017] 3. The temperature sensing channel of the battery temperature sensing bracket device of the present invention is arc-shaped or wave-shaped, which has good flexibility and can effectively absorb the slight displacement caused by battery expansion and compression collision, avoid the FPC flexible circuit board being pulled and damaged or the temperature sensing probe falling off, and ensure the continuity and stability of temperature acquisition; at the same time, the FPC flexible circuit board can take into account both temperature and voltage signal acquisition, with high functional integration and reduced overall battery pack cost.

[0018] 4. The temperature sensing groove of the battery temperature sensing bracket device of the present invention is filled with thermally conductive structural adhesive. The temperature sensing probe is fixed by the thermally conductive structural adhesive to ensure that the temperature sensing probe and the battery cell remain in contact, thereby preventing the temperature sensing probe from separating from the battery cell due to vehicle fluctuations and causing temperature measurement failure.

[0019] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 An exploded view of the battery temperature sensing bracket device in an embodiment of this application is shown.

[0022] Figure 2 A top view of the temperature sensing bracket mounted on the upper surface of the battery cell in an embodiment of this application is shown.

[0023] Figure 3 A schematic diagram of the temperature-sensing bracket in an embodiment of this application is shown.

[0024] Figure 4 A schematic diagram of the temperature-sensing bracket and the FPC flexible circuit board mounted on the battery cell is shown in an embodiment of this application.

[0025] Figure 5 A schematic diagram of the temperature-sensing bracket, FPC flexible circuit board, and temperature-sensing protective cover installed on the battery cell is shown in an embodiment of this application.

[0026] Explanation of reference numerals in the attached figures: 1. Battery cell; 11. Top; 12. Terminal post; 13. Explosion-proof valve; 2. Temperature sensing bracket; 21. Middle section; 211. Injection hole; 212. Temperature sensing groove; 213. Mounting boss; 22. First extension; 221. Positioning groove; 23. Second extension; 3. Flexible printed circuit board (FPC); 31. Temperature sensing channel; 311. Temperature sensing probe; 32. Notch; 4. Temperature-sensitive protective cover. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] Example 1 refer to Figure 1 A battery temperature sensing bracket device includes a battery cell 1, a temperature sensing bracket 2, an FPC flexible circuit board 3, and a temperature sensing protective cover 4. The upper surface of the battery cell 1 is provided with a top 11, and two terminals 12 are symmetrically arranged on both sides of the upper surface of the top 11, which are the positive terminal and the negative terminal, respectively. An explosion-proof valve 13 is provided in the middle of the top 11. The temperature sensing bracket 2 is set tightly against the top 11, and the bottom surface of the temperature sensing bracket 2 is fixed to the top 11 by adhesive backing. The adhesive backing or coating area avoids the explosion-proof valve 13 to ensure that the gas pressure and ejected material generated by the opening of the explosion-proof valve 13 can be smoothly discharged when the battery cell 1 experiences thermal runaway, avoiding obstruction and safety hazards. At the same time, the temperature sensing bracket 2 cooperates with the terminal 12 through a positioning groove 221 to achieve limited installation.

[0029] refer to Figure 3 The temperature sensing bracket 2 includes a middle part 21. The upper surface of the middle part 21 is provided with a plurality of arrays of injection holes 211. The injection holes 211 are arranged in a matrix array and penetrate through the middle part 21. The injection holes 211 are located directly above the explosion-proof valve 13. The function of the injection holes 211 is to weaken the structural strength of the temperature sensing bracket 2 at this point, so that the gas pressure generated when the explosion-proof valve 13 of the battery cell 1 is opened in the event of thermal runaway can be smoothly discharged. In more serious cases, it can also break through the middle part 21 and allow the ejected material inside the battery cell 1 to be discharged quickly.

[0030] refer to Figure 3The upper surface of the middle section 21 is also provided with two symmetrically arranged temperature sensing grooves 212. The temperature sensing grooves 212 penetrate the upper and lower surfaces of the middle section 21, exposing the corresponding area of ​​the top 11. The temperature sensing grooves 212 are used to place temperature sensing probes 311, so that the temperature sensing probes 311 of the FPC flexible circuit board 3 can accurately collect the body temperature of the cell 1 in this area. The specific arrangement can be flexibly adjusted according to the actual temperature collection requirements: a temperature sensing probe 311 can be placed in one temperature sensing groove 212 and not placed in another; or all of them can be placed or none can be placed. Among them, the temperature sensing grooves 212 where the temperature sensing probe 311 is placed need to be equipped with a temperature sensing protective cover 4. The temperature sensing grooves 212 where the temperature sensing probe 311 is not placed are directly covered by the body of the FPC flexible circuit board 3 to avoid the temperature sensing grooves 212 being exposed, to prevent the intrusion of small foreign objects, and to ensure the overall aesthetics of the structure.

[0031] Furthermore, the first extension 22 and the second extension 23 are symmetrically arranged, and are located on opposite sides of the middle portion 21. The upper surfaces of the first extension 22 and the second extension 23 must be lower than the upper surface of the pole post 12. Otherwise, it will affect the welding of the pole post 12 to the busbar directly above it. Each of the first extension 22 and the second extension 23 is provided with a circular positioning groove 221, which is fitted onto the outside of the pole post 12. The circumference of the positioning groove 221 is slightly larger than the circumference of the pole post 12, thus facilitating the fitting of the positioning groove 221 onto the outside of the pole post 12. The temperature sensing bracket 2 is precisely positioned on the upper surface of the top 11 via the positioning groove 221 and the pole post 12.

[0032] Furthermore, the temperature-sensing bracket 2 and the temperature-sensing protective cover 4 are made of plastic, which has good insulation and cannot conduct electricity; otherwise, it would directly cause safety risks such as electric shock or short circuit.

[0033] refer to Figure 4 The temperature and voltage signals collected by the temperature sensor 311 are transmitted to the battery management system for effective battery management. This case only involves the acquisition of temperature signals, but does not represent the scope of this case study.

[0034] refer to Figure 5 The upper surface of the FPC flexible circuit board 3 is provided with a temperature sensing channel 31. In practice, there are many temperature sensing channels 31, but this case only describes one temperature sensing channel 31. The temperature sensing channel 31 is arranged at the edge of the FPC flexible circuit board 3. Only one temperature sensing channel 31 is connected to the FPC flexible circuit board 3, and the other two directions are separated from the body of the FPC flexible circuit board 3 by notches 32, making the temperature sensing channel 31 more flexible.

[0035] Furthermore, each temperature sensing channel 31 integrates a temperature sensing probe 311, which is placed inside the temperature sensing slot 212 and directly contacts the top 11, enabling direct acquisition of the body temperature of the battery cell 1. This solves the problem of temperature difference deviation caused by the acquisition of the battery cell temperature in the prior art and improves the accuracy of temperature acquisition.

[0036] Furthermore, when the temperature sensor 311 is initially connected to the top 11, the temperature sensing channel 31 should avoid being in a straight stretched state and should preferably be set in an arc or wave shape. This structural design can effectively absorb the slight displacement caused by the expansion or compression collision of the battery cell 1. This arc or wave shape can absorb such slight displacement, avoid relative pulling between the FPC flexible circuit board 3 and the battery cell 1, prevent the temperature sensor 311 from falling off or the FPC flexible circuit board 3 from being damaged, and ensure the continuity and reliability of temperature acquisition.

[0037] refer to Figure 5 After the temperature sensing groove 212 is filled with thermally conductive structural adhesive, it is connected to the temperature sensing protective cover 4 by the mounting boss 213 on the temperature sensing groove 212, so as to achieve the sealing protection of the temperature sensing groove 212, prevent small foreign objects from entering the interior of the temperature sensing groove 212, and protect the temperature sensing probe 311 and the thermally conductive structural adhesive, thus extending the service life of the components.

[0038] Furthermore, by cooperating with the positioning groove 221 of the temperature-sensing bracket 2 and the electrode post 12, the temperature-sensing bracket 2 and the temperature-sensing probe 311 are accurately positioned. At the same time, the upper surface of the extension of the temperature-sensing bracket 2 is lower than the upper surface of the electrode post 12 to avoid interference with the welding of the electrode post 12 and the busbar, thus balancing positioning accuracy and assembly convenience, and meeting the needs of large-scale battery pack production.

[0039] Furthermore, the temperature sensor 311 adopts a dual fixing method of "initial fixation with back adhesive + reinforcement with thermally conductive structural adhesive". Combined with the sealing protection of the temperature sensor cover 4, it not only ensures the reliability of the connection between the temperature sensor 311 and the main body of the battery cell 1, but also improves the temperature conduction efficiency through the thermally conductive structural adhesive, while preventing the intrusion of tiny foreign objects and extending the service life of the temperature sensor 311. The selection of thermally conductive structural adhesive also takes into account the bonding strength and environmental resistance, and is suitable for the complex working conditions of the battery pack.

[0040] The spray hole 211 design of the temperature sensing bracket 2, combined with the arrangement of the backing / coating area to avoid the explosion-proof valve 13, ensures that when the cell 1 experiences thermal runaway, the air pressure and ejected material generated by the opening of the explosion-proof valve 13 can be smoothly discharged, further improving the safety performance of the battery pack and meeting the relevant battery safety standards.

[0041] Example 2 refer to Figure 1A battery temperature sensing bracket device includes a battery cell 1, a temperature sensing bracket 2, and an FPC flexible circuit board 3. The temperature sensing bracket 2 is mounted on the upper surface of the battery cell 1. The temperature sensing bracket 2 includes a first extension 22, a middle part 21, and a second extension 23 connected in sequence. Both the first extension 22 and the second extension 23 are fixedly connected to the upper surface of the battery cell 1. A temperature sensing groove 212 is provided on the upper surface of the middle part 21. This invention solves the technical problems of inconvenient arrangement, inaccurate positioning, unreliable connection, and easy interference with the welding of the electrode post 12 and the operation of the explosion-proof valve 13 when the temperature sensing probe 311 is directly connected to the body of the battery cell 1 by providing a temperature sensing groove 212 on the upper surface of the middle part 21. This invention provides a battery temperature sensing bracket device with reasonable structure, convenient installation, accurate positioning, and reliable connection, which can realize direct contact between the temperature sensing probe 311 and the body of the battery cell 1 to accurately collect temperature, while adapting to the welding of the electrode post 12 and ensuring the normal operation of the explosion-proof valve 13.

[0042] refer to Figure 4 The FPC flexible circuit board 3 is installed on the side of the temperature sensing bracket 2 away from the battery cell 1. A temperature sensing channel 31 is provided at the edge of the FPC flexible circuit board 3, and a temperature sensing probe 311 is installed at the end of the temperature sensing channel 31 away from the FPC flexible circuit board 3. The temperature sensing probe 311 passes through the temperature sensing groove 212 and contacts the upper surface of the battery cell 1. This invention achieves direct measurement of the temperature of the battery cell 1 by having the temperature sensing probe 311 pass through the temperature sensing groove 212 and contact the upper surface of the battery cell 1. This completely solves the problem of temperature difference deviation in the temperature acquisition of the battery cell in the prior art, greatly improves the accuracy of temperature acquisition, truly reflects the temperature of the battery cell body, provides accurate data for the BMS, effectively avoids the risk of thermal runaway, and optimizes the cycle life and energy efficiency of the battery cell 1. It is especially suitable for high temperature difference conditions such as fast charging and high-rate discharge.

[0043] refer to Figure 4 The upper surface of the FPC flexible circuit board 3 has a notch 32, which is located on the side of the temperature sensing channel 31 close to the FPC flexible circuit board 3; the notch 32 is L-shaped. By setting the notch 32, one end of the temperature sensing channel 31 is connected to the battery cell 1, which allows the temperature sensing channel 31 to be bent into an arc shape or a wave shape to contact the upper surface of the battery cell 1, and enables the temperature sensing probe 311 on the temperature sensing channel 31 to directly measure the temperature of the battery cell 1.

[0044] Furthermore, the temperature sensing channel 31 is bow-shaped or wavy. Specifically, the temperature sensing channel 31 adopts a notch 32 isolation design and is arranged in a bow-shaped or wavy shape, which has good flexibility and can effectively absorb the slight displacement caused by battery expansion or squeezing collision, avoiding damage to the FPC flexible circuit board 3 or the temperature sensing probe 311 from being pulled off, thus ensuring the continuity and stability of temperature acquisition; at the same time, the FPC flexible circuit board 3 can also handle temperature and voltage signal acquisition, with high functional integration, reducing the overall cost of the battery pack.

[0045] refer to Figure 2 The upper surface of the middle part 21 is provided with a spray hole 211, which is directly opposite the explosion-proof valve 13 of the battery cell 1. This ensures that when the battery cell 1 experiences thermal runaway, the gas pressure and ejected material generated by the opening of the explosion-proof valve 13 can be smoothly discharged, further improving the safety performance of the battery pack and meeting the relevant battery safety standards.

[0046] refer to Figure 5 The battery temperature sensing bracket device also includes a temperature sensing protective cover 4; a mounting boss 213 is provided on the side of the temperature sensing groove 212, and the temperature sensing protective cover 4 is installed in the temperature sensing groove 212, with the mounting boss 213 engaging with the temperature sensing protective cover 4. This prevents the temperature sensing groove 212 from being exposed, prevents the intrusion of small foreign objects, and ensures the overall aesthetics of the structure.

[0047] Furthermore, the temperature sensing bracket 2 and the temperature sensing protective cover 4 are made of insulating plastic. The arrangement of the temperature sensing slot 212 can be flexibly adjusted according to the actual temperature acquisition requirements. The temperature sensing bracket 2 and the temperature sensing protective cover 4 are made of insulating plastic, with a simple structural design, controllable cost, convenient installation, and compatibility with different specifications of power and energy storage batteries; thus achieving wide applicability and facilitating large-scale promotion and application.

[0048] Furthermore, the temperature sensing groove 212 is filled with thermally conductive structural adhesive. The thermally conductive structural adhesive is used to fix the temperature sensing probe 311, ensuring that the temperature sensing probe 311 remains in contact with the battery cell 1, thereby preventing the temperature sensing probe 311 from separating from the battery cell 1 due to vehicle fluctuations, which would cause temperature measurement failure.

[0049] refer to Figure 2 The upper surfaces of the first extension 22 and the second extension 23 are provided with positioning grooves 221, which are fitted onto the outer side of the terminal post 12 of the battery cell 1; adhesive is applied between the first extension 22 and the second extension 23 and the battery cell 1.

[0050] Specifically, the spray hole 211 in the middle part 21 of the temperature sensing bracket 2 is designed to avoid the arrangement of the back adhesive / coating area from the explosion-proof valve 13, so as to ensure that when the cell 1 experiences thermal runaway, the air pressure and ejected material generated by the opening of the explosion-proof valve 13 can be smoothly discharged, further improving the safety performance of the battery pack and meeting the relevant battery safety standards.

[0051] Example 3 A battery pack includes a housing and a battery management system. The housing contains a battery cell 1 and the battery management system. The battery cell 1 is equipped with a battery temperature sensing bracket device according to Embodiment 1 or Embodiment 2. The temperature sensing probe 311 of the battery temperature sensing bracket device is electrically connected to the battery management system.

[0052] Example 4 An electric vehicle includes a frame and a motor, with the motor and a battery pack (as described in Embodiment 3) mounted on the frame, the battery pack being electrically connected to the motor.

[0053] Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A battery temperature sensing bracket device, characterized in that, The device includes a battery cell (1), a temperature-sensing bracket (2), and an FPC flexible circuit board (3). The temperature-sensing bracket (2) is mounted on the upper surface of the battery cell (1). The temperature-sensing bracket (2) includes a first extension (22), a middle part (21), and a second extension (23) connected in sequence. Both the first extension (22) and the second extension (23) are fixedly connected to the upper surface of the battery cell (1). A temperature-sensing groove (212) is provided on the upper surface of the middle part (21). The FPC flexible circuit board (3) is installed on the side of the temperature sensing bracket (2) away from the battery cell (1). A temperature sensing channel (31) is provided at the edge of the FPC flexible circuit board (3). A temperature sensing probe (311) is installed at the end of the temperature sensing channel (31) away from the FPC flexible circuit board (3). The temperature sensing probe (311) passes through the temperature sensing groove (212) and contacts the upper surface of the battery cell (1).

2. The battery temperature sensing bracket device according to claim 1, characterized in that, The upper surface of the FPC flexible circuit board (3) is provided with a notch (32), which is located on the side of the temperature sensing channel (31) close to the FPC flexible circuit board (3); the notch (32) is L-shaped.

3. The battery temperature sensing bracket device according to claim 2, characterized in that, The temperature sensing channel (31) is bow-shaped or wavy.

4. The battery temperature sensing bracket device according to claim 1, characterized in that, The upper surface of the middle part (21) is provided with a spray hole (211), which is directly opposite the explosion-proof valve (13) of the battery cell (1).

5. The battery temperature sensing bracket device according to claim 1, characterized in that, The battery temperature sensing bracket device also includes a temperature sensing protective cover (4); the side of the temperature sensing groove (212) is provided with a mounting boss (213), the temperature sensing protective cover (4) is installed in the temperature sensing groove (212), and the mounting boss (213) is engaged with the temperature sensing protective cover (4).

6. A battery temperature sensing bracket device according to claim 5, characterized in that, The temperature-sensing bracket (2) and the temperature-sensing protective cover (4) are made of insulating plastic material.

7. A battery temperature sensing bracket device according to claim 5 or 6, characterized in that, The temperature sensing groove (212) is filled with thermally conductive structural adhesive.

8. A battery temperature sensing bracket device according to claim 1, characterized in that, The upper surfaces of the first extension (22) and the second extension (23) are provided with positioning grooves (221), which are fitted on the outside of the pole (12) of the battery cell (1); the first extension (22) and the second extension (23) are coated with glue between them and the battery cell (1).

9. A battery pack, characterized in that, It includes a housing and a battery management system. The housing contains a battery cell (1) and a battery management system. The battery cell (1) is equipped with a battery temperature sensing bracket device as described in any one of claims 1-8. The temperature sensing probe (311) of the battery temperature sensing bracket device is electrically connected to the battery management system.

10. A tram, characterized in that, It includes a frame and a motor, wherein the motor and the battery pack of claim 9 are mounted on the frame, and the battery pack is electrically connected to the motor.

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