Battery module with temperature detection function

Abstract

The application relates to the technical field of battery modules, in particular to a battery module with a temperature detection function; the battery module comprises a shell, a module end plate and a battery cell are arranged in the shell; the module end plate is provided with two groups; the two groups of module end plates are welded with the inner wall of the shell; the battery cell is arranged between the two groups of module end plates; a top cover is fixedly arranged on the upper end of the shell; the fixed support is arranged, so that the fixed support can fix the temperature sensor on the top cover, thereby avoiding the problems of fatigue of an adhesive layer, aging of an adhesive and the like caused by long-term temperature circulation, the connection firmness between the temperature sensor and the top cover is improved, the fitting effect between the temperature sensor and the top cover of the battery module is ensured, the temperature measured by the temperature sensor is ensured to be consistent with the actual temperature of the battery module, and the authenticity of temperature collection is ensured.

Description

Technical Field

[0001] This invention relates to the field of battery module technology, specifically a battery module with temperature detection function. Background Technology

[0002] As the development of new energy vehicles has progressed, the power battery module, a crucial component of these vehicles, has become a focal point, with issues such as reducing design and manufacturing costs and ensuring aftermarket maintainability becoming key concerns. Since batteries generate heat during charging and discharging, excessively high temperatures can lead to battery performance degradation or damage. Therefore, power battery modules are often equipped with temperature acquisition units to detect abnormal temperatures. When the temperature exceeds a safe threshold, the Battery Management System (BMS) takes measures (such as adjusting the charging and discharging current or disconnecting the battery from the circuit) to prevent overheating and ensure the safe operation of the battery system.

[0003] Existing temperature sensors are mostly installed on the top cover of the module to collect temperature data. This is because the heat generated by the battery cell rises to the top cover of the battery module, making the heat distribution on the top cover more uniform. The temperature sensor installed on the top cover can better detect the average temperature of the entire module.

[0004] However, when installing temperature sensors on the top cover of the battery module, ensuring a good fit between the sensor and the cover is crucial. This is because the temperature sensor detects the battery module's temperature by measuring temperature changes at the point of contact with the module. In traditional battery module designs, self-adhesive temperature sensors are a common and convenient installation method. Their working principle involves directly attaching the temperature sensor with adhesive backing to the top cover. However, battery modules undergo temperature cycling during normal operation, resulting in periodic temperature increases and decreases. Prolonged temperature cycling can lead to adhesive fatigue and aging, reducing bond strength and causing poor fit between the temperature sensor and the top cover. This gap can result in the sensor measuring a lower temperature than the actual module temperature, leading to incorrect thermal management decisions.

[0005] In view of this, in order to overcome the above-mentioned technical problems, the present invention proposes a battery module with temperature detection function, which solves the above-mentioned technical problems. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, this invention proposes a battery module with temperature detection function. By setting a fixing bracket, the temperature sensor can be fixed to the top cover, thus eliminating the need for adhesive to adhere the temperature sensor. This avoids problems such as fatigue of the adhesive layer and aging of the adhesive caused by long-term temperature cycling, thereby improving the connection between the temperature sensor and the top cover, ensuring the bonding effect between the temperature sensor and the top cover of the battery module, and thus ensuring that the temperature measured by the temperature sensor matches the actual temperature of the battery module, thereby ensuring the authenticity of the temperature acquisition.

[0007] The technical solution adopted by this invention to solve its technical problem is: a battery module with temperature detection function, comprising:

[0008] The housing contains module end plates and battery cells installed inside; two sets of module end plates are provided; the two sets of module end plates are welded to the inner wall of the housing; the battery cells are arranged between the two sets of module end plates; a top cover is fixedly installed on the upper end of the housing;

[0009] A busbar is located between the top cover and the battery cell; the busbar is fixedly connected to the top cover; the busbar is in contact with the positive and negative terminals of the battery cell; a temperature sensor is installed between the busbar and the top cover; the temperature sensor is connected to the top cover via a connecting unit; the connecting unit includes a fixing bracket; the fixing bracket has fixing holes on its surface; the top cover has bolt holes on the side near the battery cell that are directly opposite the fixing holes; the temperature sensor is fixedly connected to the fixing bracket.

[0010] Preferably, the connection unit includes a mounting plate; a groove is formed on the side of the top cover near the busbar; the mounting plate is installed in the groove; a mounting spring connected to the mounting plate is installed in the groove; and the temperature sensor is installed on the side of the mounting plate away from the groove.

[0011] Preferably, a lead screw is rotatably connected within the groove; the threads at both ends of the lead screw are arranged in opposite directions; the mounting plate is slidably connected within the groove; two sets of mounting plates are provided within the same groove; two mounting plates near the lead screw are helically connected to both ends of the lead screw; a circular groove is formed on the side of the mounting plate near the manifold; a circular plate is slidably and sealingly connected within the circular groove; the temperature sensor is threadedly connected to the end of the circular plate away from the circular groove; a handle is rotatably connected to the side wall of the top cover; the handle is connected to one end of the lead screw.

[0012] Preferably, the mounting spring is fixed to one end of the groove; a cylindrical groove is formed on the side of two adjacent sets of mounting plates that are close to each other; the cylindrical groove is connected to the circular groove; a pushing column is slidably sealed in the cylindrical groove; the two opposing pushing columns are connected by a mounting spring; and the cylindrical groove is filled with hydraulic oil.

[0013] Preferably, an oil bladder is fixedly connected to one of the opposite sides of the mounting plate; the oil bladder is connected to a circular groove; a support spring is installed inside the oil bladder; one end of the support spring is fixedly connected to the inner wall of the oil bladder, and the other end is fixedly connected to the mounting plate.

[0014] Preferably, the top cover has a sliding groove on its side wall; a blocking rod is slidably connected in the sliding groove; the blocking rod is fixedly connected to the end of the sliding groove away from the handle by a fixing spring.

[0015] Preferably, a corrugated tube is provided in the groove; the corrugated tube is located between the two mounting plates; and the mounting spring is located inside the corrugated tube.

[0016] Preferably, thermally conductive silicone is attached to the end of the temperature sensor away from the fixed bracket; the temperature sensor contacts the busbar through the thermally conductive silicone.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. This invention uses a fixed bracket to fix the temperature sensor to the top cover, eliminating the need for adhesive to adhere the temperature sensor. This avoids problems such as adhesive fatigue and aging caused by long-term temperature cycling, thereby improving the connection between the temperature sensor and the top cover and ensuring a good fit between the temperature sensor and the battery module top cover. This ensures that the temperature measured by the temperature sensor matches the actual temperature of the battery module, thus ensuring the accuracy of the temperature data acquisition.

[0019] 2. By incorporating a lead screw and mounting plates, this invention enables the lead screw to drive two mounting plates to move closer together along the grooves. This allows the two mounting plates to bring the temperature sensors on them to the U-shaped groove of the busbar, where the temperature sensors are exposed. This facilitates the user's removal of the temperature sensors without disassembling the busbar, reducing the complexity of temperature sensor disassembly and installation and avoiding the risk of damage during busbar disassembly. This significantly enhances the practicality of the invention. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is a perspective view of the housing used in this invention;

[0023] Figure 3 This is a perspective view of the top cover with a fixed bracket installed in this invention;

[0024] Figure 4This is a perspective view of the fixing bracket used in this invention;

[0025] Figure 5 This is a perspective view of the top cover with a corrugated pipe installed in this invention;

[0026] Figure 6 yes Figure 5 Enlarged view of point A in the middle;

[0027] Figure 7 This is a partial structural diagram of the top cover with a lead screw installed in this invention;

[0028] Figure 8 yes Figure 7 Enlarged view of point B in the middle;

[0029] In the diagram: 1. Housing; 11. Module end plate; 12. Battery cell; 13. Temperature sensor; 131. Thermally conductive silicone; 14. Slide groove; 15. Blocking rod; 16. Fixing spring; 2. Top cover; 21. Busbar; 22. Fixing bracket; 221. Fixing hole; 23. Mounting plate; 231. Groove; 232. Mounting spring; 233. Lead screw; 24. Circular groove; 241. Circular plate; 25. Handle; 26. Cylindrical groove; 261. Push column; 27. Oil bladder; 271. Support spring; 28. Bellows. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0031] like Figures 1 to 8 As shown, the battery module with temperature detection function according to the present invention includes the following embodiments:

[0032] Example 1:

[0033] A battery module with temperature detection function includes:

[0034] The housing 1 has a module end plate 11 and a battery cell 12 installed inside it; there are two sets of module end plates 11; the two sets of module end plates 11 are welded to the inner wall of the housing 1; the battery cell 12 is arranged between the two sets of module end plates 11; a top cover 2 is fixedly installed on the upper end of the housing 1.

[0035] A busbar 21 is located between the top cover 2 and the battery cell 12; the busbar 21 is fixedly connected to the top cover 2; the busbar 21 is in contact with the positive and negative terminals of the battery cell 12; a temperature sensor 13 is installed between the busbar 21 and the top cover 2; the temperature sensor 13 is connected to the top cover 2 via a connecting unit; the connecting unit includes a fixing bracket 22; the fixing bracket 22 has fixing holes 221 on its surface; the top cover 2 has bolt holes on its side near the battery cell 12 that are directly opposite the fixing holes 221; the temperature sensor 13 is fixedly connected to the fixing bracket 22.

[0036] When the temperature sensor 13 is installed on the top cover 2 of the battery module, it is crucial to ensure a good fit between the temperature sensor 13 and the top cover 2. This is because the temperature sensor 13 detects the temperature of the battery module by measuring the temperature change of the part in contact with the battery module. In traditional battery module designs, self-adhesive mounting of the temperature sensor 13 is a common and convenient method. Its working principle is to directly attach the temperature sensor 13 with adhesive backing to the top cover 2 of the battery module. However, the battery module undergoes temperature cycling during normal operation, i.e., periodic temperature rises and falls. Long-term temperature cycling can lead to problems such as adhesive fatigue and adhesive aging, which reduces its bonding strength. This results in poor fit between the temperature sensor 13 and the top cover 2 of the battery module, creating gaps. Consequently, the temperature measured by the temperature sensor 13 may be lower than the actual temperature of the module, leading to thermal management decisions based on incorrect data.

[0037] To address this issue, the present invention provides a fixing bracket 22, which allows the temperature sensor 13 to be fixed on the top cover 2. This eliminates the need for adhesive to adhere the temperature sensor 13, avoiding problems such as fatigue of the adhesive layer and aging of the adhesive caused by long-term temperature cycling. This improves the connection between the temperature sensor 13 and the top cover 2, ensuring a good fit between the temperature sensor 13 and the battery module top cover 2. As a result, the temperature measured by the temperature sensor 13 matches the actual temperature of the battery module, thus ensuring the accuracy of the temperature acquisition.

[0038] In its initial state, the housing 1 has a connection port on one side that connects to the positive and negative terminals of the battery cell 12. This connection port connects to an external power source via a connector to charge the battery cell 12 of the battery module. The user arranges two sets of battery cells 12 side-by-side inside the housing 1, with ten cells in each set. After the battery cells 12 are arranged inside the housing 1, the top cover 2 is placed on top of the housing 1 and secured to the housing 1 with screws. Since a busbar 21 is welded to the side of the top cover 2 closest to the housing 1, and the busbar 21 is in contact with the terminals of the battery cell 12, the busbar 21 can electrically connect to the battery cell 12 within the battery module. That is, the busbar 21 can effectively collect power from various sources. The current of each cell 12 is distributed to the output terminal of the battery module. When the top cover 2 is connected to the housing 1, the busbar 21 of the top cover 2 is electrically connected to the connector in the connection port of the housing 1, so that when the battery module is discharging, the busbar 21 transmits electrical energy to the external circuit; when charging, the external power supply distributes electrical energy to each cell 12 through the connection port and the busbar 21. When the fixing hole 221 on the surface of the fixing bracket 22 is aligned with the bolt hole of the top cover 2, the fixing bracket 22 can be tightened and fixed on the top cover 2 by passing the bolt through the fixing hole 221 and into the bolt hole, thereby fixing the temperature sensor 13 on the bracket.

[0039] Because the busbar 21 is in contact with the electrodes of the battery cell 12, and the heat generated by the battery cell 12 during charging and discharging mainly comes from the electrochemical reaction inside the electrodes, that is, the electrode material and the electrolyte undergo an electrochemical reaction, and lithium ions move between the positive and negative electrodes; therefore, the electrodes of the battery cell 12 are the main source of heat generation; and the contact between the busbar 21 and the electrodes of the battery cell 12 allows the heat generated by the electrodes to be transferred to the busbar 21, and the temperature sensor 13 is in contact with the busbar 21, allowing the temperature sensor 13 to detect the heat transferred from the electrodes to the busbar 21, and the temperature sensor 13 is equipped with... Four sets of temperature sensors 13 are used to detect the positive and negative electrodes of the two sets of battery cells 12 respectively. Each set of temperature sensors 13 is installed between the electrodes of two adjacent battery cells 12, thereby accurately measuring the actual operating temperature of the battery cell 12 during charging and discharging. Moreover, the installation of multiple temperature sensors 13 can accurately detect the temperature changes of each battery cell 12, so as to prevent the temperature of individual battery cells 12 from rising abnormally, ensuring that the BMS can detect it immediately and take measures (such as limiting the charging and discharging current or disconnecting the battery) to prevent thermal runaway. This improves the safety of the battery module.

[0040] Example 2:

[0041] The connection unit includes a mounting plate 23; the top cover 2 has a groove 231 on the side near the busbar 21; the mounting plate 23 is installed in the groove 231; a mounting spring 232 connected to the mounting plate 23 is installed in the groove 231; the temperature sensor 13 is installed on the side of the mounting plate 23 away from the groove 231.

[0042] In this embodiment, a lead screw 233 is rotatably connected within the groove 231; the threads at both ends of the lead screw 233 are arranged in opposite directions; the mounting plate 23 is slidably connected within the groove 231; two sets of mounting plates 23 are provided within the same groove 231; the two mounting plates 23 near the lead screw 233 are helically connected to both ends of the lead screw 233; a circular groove 24 is provided on the side of the mounting plate 23 near the manifold 21; a circular plate 241 is slidably and sealingly connected within the circular groove 24; the temperature sensor 13 is threadedly connected to the end of the circular plate 241 away from the circular groove 24; a handle 25 is rotatably connected to the side wall of the top cover 2; the handle 25 is connected to one end of the lead screw 233.

[0043] In this embodiment, the mounting spring 232 is fixedly connected to one end of the groove 231; a cylindrical groove 26 is provided on the side of the two adjacent mounting plates 23 that are close to each other; the cylindrical groove 26 is connected to the circular groove 24; a push column 261 is slidably and sealed in the cylindrical groove 26; the two opposite push columns 261 are connected by the mounting spring 232; the cylindrical groove 26 is filled with hydraulic oil.

[0044] In this embodiment, an oil bladder 27 is fixedly connected to one side of the mounting plate 23 that is far apart from the other side; the oil bladder 27 is connected to the circular groove 24; a support spring 271 is installed inside the oil bladder 27; one end of the support spring 271 is fixedly connected to the inner wall of the oil bladder 27, and the other end is fixedly connected to the mounting plate 23.

[0045] In this embodiment, a sliding groove 14 is provided on the side wall of the top cover 2; a blocking rod 15 is slidably connected in the sliding groove 14; the blocking rod 15 and the end of the sliding groove 14 away from the handle 25 are fixedly connected by a fixing spring 16.

[0046] During operation, the temperature sensor 13 is fixed to the module top cover 2 using the mounting bracket 22. Although there is no need to use adhesive to stick the temperature sensor 13 to the top cover 2, the mounting bracket 22 requires additional assembly steps and tools, which increases the complexity and cost of the mounting bracket 22 installation. In addition, the temperature sensor 13 of the battery module needs to be inspected and maintained regularly to ensure its accuracy and reliability. Since the temperature sensor 13 is installed between the busbar 21 and the top cover 2 via the mounting bracket 22, the busbar 21 needs to be removed before the temperature sensor 13 can be disassembled to prevent the busbar 21 from interfering with or obstructing the disassembly of the temperature sensor 13. This makes the disassembly and reinstallation of the temperature sensor 13 more complicated, and there is also a risk of damage to the busbar 21 during disassembly.

[0047] To address this, the present invention incorporates a lead screw 233 and mounting plates 23, enabling the lead screw 233 to drive the two mounting plates 23 to move closer to each other along the groove 231. This allows the two mounting plates 23 to move the temperature sensor 13 on them to the U-shaped groove of the busbar 21, thus exposing the temperature sensor 13 through the U-shaped groove of the busbar 21. This facilitates the user's removal of the temperature sensor 13 without disassembling the busbar 21, reducing the complexity of disassembling and installing the temperature sensor 13 and avoiding the risk of damage to the busbar 21 during disassembly. This effectively enhances the practicality of the present invention.

[0048] In the initial state, the mounting plates 23 are arranged in four sets, with adjacent sets of mounting plates 23 located between the nearest busbar 21 and the top cover 2, and the mounting springs 232 between adjacent sets of mounting plates 23 are in a stretched state; the handle 25 is gear-shaped, so that the blocking rod 15 meshes with the handle 25; the busbar 21 is U-shaped, and the mounting plates 23 are located between the busbar 21 and the top cover 2, so that the temperature sensor 13 mounted on the mounting plate 23 contacts the busbar 21; when the temperature sensor 13 needs to be periodically inspected and maintained, the user removes the top cover 2, first pulls the blocking rod 15 in the slide groove 14 to move it away from the handle 25 along the slide groove 14, so that the blocking rod 15 compresses the fixing spring. 16. Move away from the handle 25 so that the blocking rod 15 is not engaged with the handle 25; at this time, the user rotates the handle 25, so that the handle 25 can drive the lead screw 233 to rotate, so that the lead screw 233 can drive the mounting plate 23 connected to it to move closer to each other during the rotation. Since the two adjacent mounting plates 23 are connected by a connecting rod, the mounting plate 23 driven by the lead screw 233 drives the same set of mounting plates 23 connected to it to move synchronously through the connecting rod; so that the lead screw 233 can drive the two sets of mounting plates 23 at the same busbar 21 to move closer to each other, so that the two adjacent sets of mounting plates 23 drive the temperature sensor 13 in the circular groove 24 to move closer to each other. As the mounting plates 23 move in the direction of the groove, the tensioned mounting springs 232 between the two mounting plates 23 continuously recover. At this time, the distance between the ends of the mounting plates 23 that are furthest apart and the groove wall of the groove 231 continuously increases, causing the oil bladder 27, which is compressed between the mounting plates 23 and the groove wall of the groove 231, to continuously extend and recover under the restoring force of the supporting springs 271. Since the oil bladder 27 is connected to the circular groove 24, the hydraulic oil in the circular groove 24 can flow back into the oil bladder 27, reducing the amount of hydraulic oil in the circular groove 24. This causes the negative pressure in the circular groove 24 to attract the circular plate 241, driving the temperature sensor 13, which is threadedly connected to it, into the circular groove 24 and moving it away from the manifold 21. This causes the temperature sensor 13 to... When the manifold 21 separates, the mounting plate 23 moves the temperature sensor 13 into the U-shaped groove of the manifold 21, preventing the temperature sensor 13 located in the circular groove 24 from sliding into the manifold 21. This avoids sliding friction between the temperature sensor 13 and the manifold 21, thus preventing damage to the sensing end of the temperature sensor 13 due to friction, and ensuring the service life and detection accuracy of the temperature sensor 13. When the mounting plate 23 moves the temperature sensor 13 into the U-shaped groove of the manifold 21, the oil bladder 27 is fully restored. As the two adjacent mounting plates 23 move closer together, they compress the mounting spring 232 between them.Because the mounting spring 232 is connected to the two push columns 261 on the side of the two mounting plates 23 that are close to each other, the compressed mounting spring 232 can push the two connected push columns 261 to move away from each other, so that the two adjacent push columns 261 are pushed into the cylindrical groove 26 by the same mounting spring 232. Because the cylindrical groove 26 is connected to the circular groove 24, the hydraulic oil in the cylindrical groove 26 can flow into the circular groove 24 and push the circular plate 241 in the circular groove 24 to drive the temperature sensor 13 out of the circular groove 24. Since the elastic coefficient of the support spring 271 is large, the support spring 271 will not be stretched by the hydraulic oil, that is, the oil bladder 27 always remains in a stable state, thereby allowing the temperature sensor 13 to extend out of the circular groove 24 and expose the U-shaped groove of the manifold 21. Because the temperature sensor 13 is threadedly connected to the circular plate 241, the user can unscrew and remove the temperature sensor 13 that extends out of the circular groove 24, which makes it easy for the user to remove the temperature sensor 13 and perform the inspection and maintenance of the temperature sensor 13.

[0049] After the temperature sensor 13 has been inspected and maintained, the user can replace it if it is damaged. The undamaged or replaced temperature sensor 13 will be rotated back to the end of the circular plate 241 away from the circular groove 24. Then, the handle 25 will be rotated in the opposite direction, causing the lead screw 233 to rotate in the opposite direction. This will drive the two adjacent mounting plates 23 to move away from each other, causing the mounting plates 23 to move the push column 261 away from each other. At this point, the installation... Spring 232 continuously returns to its original position. When spring 232 is fully restored, it pulls the two push pins 261 connected to it out of the cylindrical groove 26 and move towards each other, increasing the space within the cylindrical groove 26. This allows the hydraulic oil in the circular groove 24 to flow back into the cylindrical groove 26, causing the circular plate 241 in the circular groove 24 to drive the temperature sensor 13 into the circular groove 24. This prevents the circular plate 241 extending out of the circular groove 24 from being blocked by the manifold 21 due to being exposed in the U-shaped groove of the manifold 21. This facilitates the flow of hydraulic oil into the circular groove 24. Plate 241 drives temperature sensor 13 into the space between manifold 21 and top cover 2; when mounting plate 23 drives temperature sensor 13 in circular groove 24 across the U-shaped groove of manifold 21 to the space between manifold 21 and top cover 2, as mounting plate 23 continues to approach the groove wall of slide 14, it causes oil bladder 27 to continuously approach the groove wall of slide 14 until oil bladder 27 contacts the groove wall of slide 14, causing oil bladder 27 to be squeezed by mounting plate 23 and the groove wall of slide 14, thus compressing the support spring 271 inside oil bladder 27. This allows the hydraulic oil in the oil bladder 27 to enter the circular groove 24 and push the circular plate 241 in the circular groove 24, causing the temperature sensor 13 to extend out of the circular groove 24. This allows the temperature sensor 13 extending out of the circular groove 24 to contact the busbar 21, thereby improving the fit between the temperature sensor 13 and the busbar 21. This avoids poor fit between the temperature sensor 13 and the busbar 21, preventing gaps and ensuring that the temperature measured by the temperature sensor 13 matches the actual temperature of the battery module. This, in turn, ensures the accuracy of the temperature acquisition by the temperature sensor 13.

[0050] In this embodiment, a bellows 28 is provided in the groove 231; the bellows 28 is located between the two mounting plates 23; and the mounting spring 232 is located inside the bellows 28.

[0051] In this embodiment, thermally conductive silicone 131 is attached to the end of the temperature sensor 13 away from the fixed bracket 22; the temperature sensor 13 contacts the busbar 21 through the thermally conductive silicone 131.

[0052] During operation, a bellows 28 is installed between two adjacent mounting plates 23 within the same groove 231. This bellows 28 protects the mounting spring 232 during temperature sensor 13 detection and maintenance, preventing external impurities from clogging the pitch of the mounting spring 232. This prevents the mounting spring 232 from becoming blocked and unable to contract properly, thus preventing a blocked mounting spring 232 from obstructing the two adjacent mounting plates 23 from approaching each other, thereby ensuring the normal and stable operation of the invention. The thermally conductive silicone 131 attached to the temperature sensing end of the temperature sensor 13 improves the thermal contact between the temperature sensor 13 and the busbar 21. Because the thermally conductive silicone 131 has good thermal conductivity, it can quickly transfer heat from the surface of the busbar 21 to the temperature sensor 13. This allows the temperature sensor 13 to respond to temperature changes more quickly, improving the sensitivity and accuracy of temperature measurement. Furthermore, the thermally conductive silicone 131 also has a certain degree of elasticity, allowing it to absorb slight... The vibration and mechanical stress are reduced, and the impact of slight vibrations is minimized, resulting in a tighter fit between the temperature sensor 13 and the manifold 21. This makes the readings of the temperature sensor 13 more stable and reliable. On the other hand, when the circular plate 241 is pushed by the hydraulic oil, causing the temperature sensor 13 to contact the manifold 21, the temperature sensor 13 causes the thermally conductive silicone 131 to contact the manifold 21. This causes the thermally conductive silicone 131 to be squeezed by the temperature sensor 13 and to deform to a certain extent. This deformation increases the contact area between the thermally conductive silicone 131 and the temperature sensor 13, thus increasing the thermal conductivity area of ​​the thermally conductive silicone 131 and increasing the heat conduction path from the manifold 21 to the temperature sensor 13. Since heat conduction occurs through the contact surface, a larger contact area means that more heat is conducted to the temperature sensor 13 by the thermally conductive silicone 131, thereby improving the heat conduction efficiency of the temperature sensor 13. This allows the temperature sensor 13 to respond to temperature changes more quickly, further improving the detection accuracy of the temperature sensor 13.

[0053] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the convenience of describing the present invention and simplifying the description only, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and should not be construed as indicating or implying relative importance.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A battery module with temperature detection function, comprising: A housing (1), wherein a module end plate (11) and a battery cell (12) are installed inside the housing (1); two sets of module end plates (11) are provided; the two sets of module end plates (11) are welded to the inner wall of the housing (1); the battery cell (12) is arranged between the two sets of module end plates (11); a top cover (2) is fixedly installed on the upper end of the housing (1); characterized in that: A busbar (21) is located between the top cover (2) and the battery cell (12); the busbar (21) is fixedly connected to the top cover (2); the busbar (21) is in contact with the positive and negative terminals of the battery cell (12); a temperature sensor (13) is installed between the busbar (21) and the top cover (2); the temperature sensor (13) is connected to the top cover (2) through a connecting unit; the connecting unit includes a fixing bracket (22); a fixing hole (221) is provided on the surface of the fixing bracket (22); a bolt hole is provided on the side of the top cover (2) near the battery cell (12) that is directly opposite to the fixing hole (221); the temperature sensor (13) is fixedly connected to the fixing bracket (22); The connection unit includes a mounting plate (23); the top cover (2) has a groove (231) on the side near the busbar (21); the mounting plate (23) is installed in the groove (231); a mounting spring (232) connected to the mounting plate (23) is installed in the groove (231); the temperature sensor (13) is installed on the side of the mounting plate (23) away from the groove (231); A lead screw (233) is rotatably connected within the groove (231); the threads at both ends of the lead screw (233) are arranged in opposite directions; the mounting plate (23) is slidably connected within the groove (231); two sets of mounting plates (23) are provided within the same groove (231); the two mounting plates (23) near the lead screw (233) are helically connected to both ends of the lead screw (233); a circular groove (24) is provided on the side of the mounting plate (23) near the manifold (21); a circular plate (241) is slidably and sealingly connected within the circular groove (24); the temperature sensor (13) is threadedly connected to the end of the circular plate (241) away from the circular groove (24); a handle (25) is rotatably connected to the side wall of the top cover (2); the handle (25) is connected to one end of the lead screw (233).

2. A battery module with temperature detection function according to claim 1, characterized in that: The mounting spring (232) is fixed to one end of the groove (231); a cylindrical groove (26) is provided on the side of the two adjacent mounting plates (23) that are close to each other; the cylindrical groove (26) is connected to the circular groove (24); a push column (261) is slidably sealed in the cylindrical groove (26); the two push columns (261) facing each other are connected by the mounting spring (232); the cylindrical groove (26) is filled with hydraulic oil.

3. A battery module with temperature detection function according to claim 2, characterized in that: An oil bladder (27) is fixedly connected to one side of the mounting plate (23) that is far apart from each other; the oil bladder (27) is connected to the circular groove (24); a support spring (271) is installed inside the oil bladder (27); one end of the support spring (271) is fixedly connected to the inner wall of the oil bladder (27), and the other end is fixedly connected to the mounting plate (23).

4. A battery module with temperature detection function according to claim 3, characterized in that: The top cover (2) has a sliding groove (14) on its side wall; a blocking rod (15) is slidably connected in the sliding groove (14); the blocking rod (15) and the end of the sliding groove (14) away from the handle (25) are fixedly connected by a fixing spring (16).

5. A battery module with temperature detection function according to claim 4, characterized in that: A bellows (28) is provided in the groove (231); the bellows (28) is located between the two mounting plates (23); the mounting spring (232) is located inside the bellows (28).

6. A battery module with temperature detection function according to claim 5, characterized in that: The end of the temperature sensor (13) away from the fixed bracket (22) is attached with thermally conductive silicone (131); the temperature sensor (13) is in contact with the busbar (21) through the thermally conductive silicone (131).

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