Battery module with temperature detection function

Abstract

The invention relates to the technical field of battery modules, in particular to a battery module with a temperature detection function. Comprising a shell, and a module end plate and a battery cell are mounted in the shell; the number of the module end plates is two. The two groups of module end plates are welded with the inner wall of the shell; the battery cells are arranged between the two groups of module end plates; a top cover is fixedly mounted at the upper end of the shell; according to the invention, by arranging the fixing bracket, the fixing bracket can fix the temperature sensor on the top cover, so that the temperature sensor does not need to be adhered by using gum, and the problems of bonding layer fatigue, adhesive aging and the like caused by long-term temperature circulation are avoided, so that 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, so that the temperature measured by the temperature sensor conforms to the actual temperature of the battery module, and the authenticity of temperature acquisition is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of battery modules, in particular to a battery module with a temperature detection function. Background Art

[0002] As new energy vehicles have developed to date, power battery modules, as an important component of new energy vehicles, have become the focus of attention in terms of how to reduce design and processing costs and maintainability in the after-sales market. Since batteries generate heat during the charging and discharging process, excessive temperature can cause battery performance degradation or damage. Therefore, temperature acquisition units are often installed in power battery modules to detect temperature anomalies. When the temperature exceeds the safety threshold, the BMS takes measures (such as adjusting the charging and discharging current, cutting off the connection between the battery and the circuit, etc.) to prevent the battery from overheating and ensure the safe operation of the battery system.

[0003] Existing temperature sensors are mostly installed on the top cover of the module for temperature collection. This is because the heat generated by the battery cell will rise to the top cover of the battery module, making the heat more evenly distributed on the top cover. The temperature sensor installed on the top cover can better detect the average temperature of the entire module.

[0004] However, when the temperature sensor is installed on the top cover of the battery module, it is very important to ensure that the temperature sensor and the top cover of the module are well attached. This is because the temperature sensor detects the temperature of the battery module by measuring the temperature change of the contact part between itself and the battery module. In the traditional battery module design, the self-adhesive chip-mounted temperature sensor is a common and simple installation method. Its working principle is to directly attach the temperature sensor with adhesive backing to the top cover of the battery module. However, the battery module will experience temperature cycles during normal operation, that is, periodic temperature increases and decreases. Long-term temperature cycles will cause problems such as fatigue of the adhesive layer and aging of the adhesive, which will reduce its bonding strength. The temperature sensor and the top cover of the battery module are poorly attached and there is a gap, which causes the temperature measured by the temperature sensor to be lower than the actual temperature of the module, resulting in thermal management decisions based on erroneous data.

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

[0006] In order to make up for the deficiencies of the prior art, the present invention proposes a battery module with a temperature detection function. The present invention arranges a fixed bracket so that the fixed bracket can fix the temperature sensor on the top cover, thereby eliminating the need to use adhesive to adhere the temperature sensor, avoiding problems such as fatigue of the bonding layer and aging of the adhesive caused by long-term temperature cycles, thereby improving the connection firmness between the temperature sensor and the top cover, ensuring the fitting effect between the temperature sensor and the top cover of the battery module, thereby ensuring that the temperature measured by the temperature sensor is consistent with the actual temperature of the battery module, and further ensuring the authenticity of the temperature acquisition.

[0007] The technical solution adopted by the present invention to solve the technical problem is: a battery module with temperature detection function described in the present invention comprises:

[0008] A shell, wherein a module end plate and a battery cell are installed inside the shell; two groups of module end plates are provided; the two groups of module end plates are welded to the inner wall of the shell; the battery cells are arranged between the two groups of module end plates; a top cover is fixedly installed on the upper end of the shell;

[0009] A busbar, the 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 poles 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; a fixing hole is provided on the surface of the fixing bracket; a bolt hole is provided on a side of the top cover close to the battery cell and is opposite to the fixing hole; the temperature sensor is fixedly connected to the fixing bracket.

[0010] Preferably, the connecting unit comprises a mounting plate; a groove is provided on a side of the top cover close to 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 a side of the mounting plate away from the groove.

[0011] Preferably, a screw is rotatably connected in the groove; the threads at both ends of the screw are arranged oppositely; the mounting plate is slidably connected in the groove; two groups of mounting plates are arranged in the same groove; two mounting plates close to the screw are spirally connected to the two ends of the screw; a circular groove is provided on one side of the mounting plate close to the busbar; a circular plate is slidably and sealingly connected in 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; and the handle is connected to one end of the screw.

[0012] Preferably, the mounting spring is fixedly connected to one end of the groove; a cylindrical groove is provided on the mutually close sides of two adjacent groups of mounting plates; the cylindrical groove is connected to the circular groove; a push column is connected in a sliding seal in the cylindrical groove; the two opposing push columns are connected by a mounting spring; and the cylindrical groove is filled with hydraulic oil.

[0013] Preferably, an oil bag is fixedly connected to one side of the mounting plate that is away from each other; the oil bag is connected to the circular groove; a support spring is installed in the oil bag; one end of the support spring is fixedly connected to the inner wall of the oil bag, and the other end is fixedly connected to the mounting plate.

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

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

[0016] Preferably, thermally conductive silica gel is adhered to one end of the temperature sensor away from the fixing bracket; and the temperature sensor is in contact with the busbar through the thermally conductive silica gel.

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

[0018] 1. The present invention provides a fixing bracket so that the fixing bracket can fix the temperature sensor on the top cover, thereby eliminating the need to use adhesive to adhere the temperature sensor, avoiding problems such as fatigue of the bonding layer and aging of the adhesive caused by long-term temperature cycles, thereby improving the connection firmness between the temperature sensor and the top cover, ensuring the fitting effect between the temperature sensor and the top cover of the battery module, thereby ensuring that the temperature measured by the temperature sensor is consistent with the actual temperature of the battery module, and further ensuring the authenticity of the temperature acquisition.

[0019] 2. The present invention sets a screw rod and a mounting plate so that the screw rod can drive the two mounting plates to move along the groove towards each other; the two mounting plates drive the temperature sensors thereon to the U-shaped groove of the busbar, so that the temperature sensors can be exposed through the U-shaped groove of the busbar, thereby facilitating the user to remove the temperature sensor without removing the busbar, which not only reduces the complexity of disassembly and installation of the temperature sensor, but also avoids the risk of damage to the busbar during disassembly, thereby effectively improving the practicality of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and implementation modes.

[0021] Figure 1 is a stereogram of the present invention;

[0022] Figure 2 is a three-dimensional diagram of a housing used in the present invention;

[0023] Figure 3 is a three-dimensional diagram of a top cover with a fixing bracket installed in the present invention;

[0024] Figure 4is a three-dimensional diagram of a fixing bracket used in the present invention;

[0025] Figure 5 is a three-dimensional view of a top cover with a bellows installed in the present invention;

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

[0027] Figure 7 It is a partial structural schematic diagram of a top cover with a screw rod installed in the present invention;

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

[0029] In the figure: 1. Shell; 11. Module end plate; 12. Battery cell; 13. Temperature sensor; 131. Thermal conductive silicone; 14. Slide groove; 15. Blocking rod; 16. Fixed spring; 2. Top cover; 21. Busbar; 22. Fixed bracket; 221. Fixed hole; 23. Mounting plate; 231. Groove; 232. Mounting spring; 233. Screw rod; 24. Circular groove; 241. Circular plate; 25. Handle; 26. Columnar groove; 261. Push column; 27. Oil bag; 271. Support spring; 28. Bellows. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0031] like Figures 1 to 8 As shown, a battery module with temperature detection function described in the present invention includes the following implementations:

[0032] Embodiment 1:

[0033] A battery module with a temperature detection function, comprising:

[0034] A housing 1, wherein a module end plate 11 and a battery cell 12 are installed inside the housing 1; two groups of the module end plates 11 are provided; the two groups of the module end plates 11 are welded to the inner wall of the housing 1; the battery cell 12 is arranged between the two groups of the module end plates 11; a top cover 2 is fixedly installed on the upper end of the housing 1;

[0035] The 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 contacts the positive and negative electrodes 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; a fixing hole 221 is provided on the surface of the fixing bracket 22; a bolt hole facing the fixing hole 221 is provided on a side of the top cover 2 close to the battery cell 12; the temperature sensor 13 is fixedly connected to the fixing bracket 22;

[0036] When working, when the temperature sensor 13 is installed on the battery module top cover 2, it is very important to ensure that the temperature sensor 13 and the module top cover 2 are well attached. This is because the temperature sensor 13 detects the temperature of the battery module by measuring the temperature change of the contact part between itself and the battery module; in the traditional battery module design, the self-adhesive patch-mounted temperature sensor 13 is a common and simple installation method; its working principle is to directly attach the temperature sensor 13 with adhesive backing to the battery module top cover 2; but the battery module will experience temperature cycles during normal operation, that is, periodic temperature increases and decreases; and long-term temperature cycles will cause problems such as fatigue of the adhesive layer and aging of the adhesive, which will reduce its bonding strength; resulting in poor fit between the temperature sensor 13 and the battery module top cover 2, and there is a gap, so that the temperature measured by the temperature sensor 13 will be lower than the actual temperature of the module, resulting in thermal management decisions based on erroneous data;

[0037] In this regard, the present invention provides a fixing bracket 22 so that the fixing bracket 22 can fix the temperature sensor 13 on the top cover 2, thereby eliminating the need to use adhesive to adhere the temperature sensor 13, avoiding problems such as fatigue of the bonding layer and aging of the adhesive due to long-term temperature cycles, thereby improving the connection firmness between the temperature sensor 13 and the top cover 2, ensuring the fitting effect between the temperature sensor 13 and the battery module top cover 2, thereby ensuring that the temperature measured by the temperature sensor 13 is consistent with the actual temperature of the battery module, thereby ensuring the authenticity of the temperature acquisition;

[0038] In the initial state, a connection port connected to the positive and negative electrodes of the battery cell 12 is installed on one side of the shell 1; the connection port is connected to an external power source through a connector to facilitate charging of the battery cell 12 of the battery module; the user arranges two groups of battery cells 12 side by side inside the shell 1, and each group of battery cells 12 is provided with ten; when the battery cells 12 are arranged in the shell 1, the top cover 2 is covered on the upper end of the shell 1, and the top cover 2 is fixed to the shell 1 by screws; because the top cover 2 is welded with a busbar 21 on one side close to the shell 1, and the busbar 21 is in contact with the electrode end of the battery cell 12, the busbar 21 can electrically connect the battery cells 12 in the battery module; that is, the busbar 21 can effectively collect the current from each The current of each battery cell 12 is distributed to the output end of the battery module, and when the top cover 2 is connected to the shell 1, the busbar 21 of the top cover 2 is electrically connected to the connector in the connection port of the shell 1, so that when the battery module is discharged, the busbar 21 transmits the electric energy to the external circuit; and when charging, the external power source distributes the electric energy to each battery cell 12 through the connection port and the busbar 21; when the fixing hole 221 opened on the surface of the fixing bracket 22 is placed opposite to the bolt hole of the top cover 2, the fixing bracket 22 can be tightened and fixed on the top cover 2 by using a bolt to pass through the fixing hole 221 and enter the bolt hole, so that the fixing bracket 22 fixes 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 in the battery module during charging and discharging mainly comes from the electrochemical reaction inside the electrode, that is, the electrode material and the electrolyte will undergo an electrochemical reaction, and lithium ions move between the positive electrode and the negative electrode; therefore, the electrode of the battery cell 12 serves as the main source of heat generation; and the busbar 21 is in contact with the electrodes of the battery cell 12, so that the heat generated by the electrode can be transferred to the busbar 21, and the temperature sensor 13 is in contact with the busbar 21, so that the temperature sensor 13 can detect the heat transferred from the electrode to the busbar 21, and the temperature sensor 13 is provided with Four groups enable the four groups of temperature sensors 13 to detect the positive and negative electrodes of the two groups of battery cells 12 respectively. Each group of temperature sensors 13 is installed between the electrodes of the corresponding two adjacent battery cells 12, so that the actual working temperature of the battery cells 12 during the charging and discharging process can be accurately measured; and the installation of multiple temperature sensors 13 can accurately detect the temperature changes of each battery cell 12 to prevent the temperature of individual battery cells 12 from abnormally rising, so as to ensure that the BMS can immediately detect and take measures (such as limiting the charging and discharging current or disconnecting the battery) to prevent the occurrence of thermal runaway; thereby improving the safety of the battery module;

[0040] Embodiment 2:

[0041] The connection unit includes a mounting plate 23; a groove 231 is provided on a side of the top cover 2 close to 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 a side of the mounting plate 23 away from the groove 231.

[0042] In this embodiment, a screw rod 233 is rotatably connected in the groove 231; the threads at both ends of the screw rod 233 are arranged in opposite directions; the mounting plate 23 is slidably connected in the groove 231; two groups of mounting plates 23 are arranged in the same groove 231; the two mounting plates 23 close to the screw rod 233 are spirally connected to the two ends of the screw rod 233; a circular groove 24 is provided on a side of the mounting plate 23 close to the busbar 21; a circular plate 241 is slidably and sealingly connected in 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 screw rod 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 mutually close sides of two adjacent groups of mounting plates 23; the cylindrical groove 26 is connected with the circular groove 24; a push column 261 is connected in a sliding seal in the cylindrical groove 26; the two opposite push columns 261 are connected by the mounting spring 232; and the cylindrical groove 26 is filled with hydraulic oil.

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

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

[0046] During operation, the temperature sensor 13 is fixed to the module top cover 2 using a fixing bracket 22. Although there is no need to use adhesive to stick the temperature sensor 13 to the top cover 2, the fixing bracket 22 requires additional assembly steps and tools, which increases the complexity and cost of installing the fixing bracket 22. In addition, the temperature sensor 13 of the battery module needs to be regularly inspected and maintained to ensure its accuracy and reliability. The temperature sensor 13 is installed between the busbar 21 and the top cover 2 through the fixing bracket 22. Therefore, before disassembling the temperature sensor 13, the busbar 21 needs to be removed first to prevent the busbar 21 from interfering with and blocking 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] In this regard, the present invention provides a screw rod 233 and a mounting plate 23, so that the screw rod 233 can drive the two mounting plates 23 to move toward each other along the groove 231; the two mounting plates 23 drive the temperature sensors 13 thereon to the U-shaped groove of the busbar 21, so that the temperature sensors 13 can be exposed through the U-shaped groove of the busbar 21, thereby facilitating the user to remove the temperature sensors 13 without removing the busbar 21, which not only reduces the complexity of disassembling and installing the temperature sensors 13, but also avoids the risk of disassembling and damaging the busbar 21, so that the practicality of the present invention is effectively improved;

[0048] In the initial state, four groups of mounting plates 23 are provided, two adjacent groups of mounting plates 23 are located between the adjacent busbar 21 and the top cover 2, and the mounting spring 232 between the two adjacent groups of mounting plates 23 is in a stretched state; the handle 25 is configured in a gear shape so that the blocking rod 15 is meshed with the handle 25, the busbar 21 is configured in a U-shape, and the mounting plate 23 is located between the busbar 21 and the top cover 2, so that the temperature sensor 13 installed on the mounting plate 23 is in contact with the busbar 21; when the temperature sensor 13 needs to be regularly inspected and maintained, the user removes the top cover 2, first pulls the blocking rod 15 in the slide groove 14 and moves along the slide groove 14 in a direction away from the handle 25, so that the blocking rod 15 squeezes the fixing spring 16 and 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 screw rod 233 to rotate, so that the screw rod 233 can drive the mounting plates 23 connected to the screw transmission to move in the direction of approaching each other during the rotation process, and since the two adjacent mounting plates 23 are connected by the connecting rod, the mounting plates 23 driven by the screw rod 233 drive the same group of mounting plates 23 connected to it to move synchronously through the connecting rod; so that the screw rod 233 can drive the two groups of mounting plates 23 at the same confluence plate 21 to move in the direction of approaching each other, so that the two adjacent groups of mounting plates 23 drive the temperature sensors 13 in the circular grooves 24 to move closer to each other. , and the oil bag 27 is pressed between the mounting plate 23 and the groove wall of the groove 231, so that the oil bag 27 is pressed between the mounting plate 23 and the groove wall of the groove 231 and is continuously stretched and restored under the push of the restoring force of the supporting spring 271; since the oil bag 27 is connected with the circular groove 24, the hydraulic oil in the circular groove 24 can flow back into the oil bag 27, so that the hydraulic oil in the circular groove 24 is reduced, so that the negative pressure adsorption circular plate 241 in the circular groove 24 drives the temperature sensor 13 threadedly connected thereto to enter the circular groove 24 and move in the direction away from the manifold 21, so that the temperature sensor 13 is The busbar 21 is separated, and the mounting plate 23 drives the temperature sensor 13 to move into the U-shaped groove of the busbar 21, so that the temperature sensor 13 in the circular groove 24 will not come into sliding contact with the busbar 21, thereby avoiding sliding friction between the temperature sensor 13 and the busbar 21, thereby avoiding damage to the sensing end of the temperature sensor 13 due to friction, thereby ensuring the service life and detection accuracy of the temperature sensor 13; when the mounting plate 23 drives the temperature sensor 13 to enter the U-shaped groove of the busbar 21, the oil bag 27 is fully restored, and as the two adjacent mounting plates 23 are constantly approaching, the two adjacent mounting plates 23 squeeze the mounting spring 232 between the two mounting plates 23;Since the mounting spring 232 is connected to the two push posts 261 on the sides of the two mounting plates 23 that are close to each other, the compressed mounting spring 232 can push the two connected push posts 261 to move away from each other, so that the two adjacent push posts 261 are pushed by the same mounting spring 232 to enter the cylindrical groove 26 where they are located; since 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 to extend out of the circular groove 24, and the elastic coefficient of the support spring 271 is relatively large, so the support spring 271 will not be stretched by the push of the hydraulic oil, that is, the oil bag 27 always maintains a stable state, so that the temperature sensor 13 extends out of the circular groove 24 and exposes the U-shaped groove of the manifold 21; since the temperature sensor 13 is threadedly connected to the circular plate 241, the user can twist and remove the temperature sensor 13 that extends out of the circular groove 24, so that it is convenient for the user to remove the temperature sensor 13 and perform detection and maintenance of the temperature sensor 13;

[0049] After the temperature sensor 13 is inspected and maintained, the user can replace the temperature sensor 13 according to whether the temperature sensor 13 is damaged, that is, the new temperature sensor 13 that is not damaged or replaced is spirally rotated again to the end of the circular plate 241 away from the circular groove 24; then the handle 25 is rotated in the opposite direction so that the handle 25 can drive the screw rod 233 to rotate in the opposite direction, so that the screw rod 233 can drive the two adjacent sets of mounting plates 23 to move away from each other, so that the mounting plates 23 drive the push columns 261 to move away from each other. The spring 232 is continuously restored; when the installation spring 232 is fully restored, the installation spring 232 will pull the two push columns 261 connected thereto to extend out of the cylindrical groove 26 and move toward each other, so that the space in the cylindrical groove 26 is increased, thereby causing the hydraulic oil in the circular groove 24 to flow back into the cylindrical groove 26, so that the circular plate 241 in the circular groove 24 drives the temperature sensor 13 to enter the circular groove 24, thereby preventing the circular plate 241 extending out of the circular groove 24 from being blocked by the manifold 21 due to being exposed to the U-shaped groove of the manifold 21; so that the circular plate 241 extending out of the circular groove 24 is not blocked by the manifold 21; The plate 241 drives the temperature sensor 13 to enter between the manifold 21 and the top cover 2; when the mounting plate 23 drives the temperature sensor 13 in the circular groove 24 to cross the U-shaped groove of the manifold 21 to between the manifold 21 and the top cover 2, as the mounting plate 23 continues to approach the groove wall of the slide groove 14, the mounting plate 23 drives the oil bag 27 to continuously approach the groove wall of the slide groove 14 until the oil bag 27 contacts the groove wall of the slide groove 14, so that the oil bag 27 is squeezed by the mounting plate 23 and the groove wall of the slide groove 14, so that the support spring 271 in the oil bag 27 is squeezed , so that the hydraulic oil in the oil bag 27 enters the circular groove 24 and pushes the circular plate 241 in the circular groove 24 to drive the temperature sensor 13 to extend out of the circular groove 24, so that the temperature sensor 13 extending out of the circular groove 24 can contact the busbar 21, thereby improving the fitting effect between the temperature sensor 13 and the busbar 21, avoiding poor fitting between the temperature sensor 13 and the busbar 21 and the existence of a gap, so as to ensure that the temperature measured by the temperature sensor 13 is consistent with the actual temperature of the battery module, thereby ensuring the authenticity of the temperature acquisition by the temperature sensor 13.

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

[0051] In this embodiment, a thermally conductive silicone 131 is attached to one end of the temperature sensor 13 away from the fixing bracket 22; the temperature sensor 13 is in contact with the manifold 21 through the thermally conductive silicone 131;

[0052] During operation, by arranging the bellows 28 between two adjacent mounting plates 23 in the same groove 231, the bellows 28 can protect the mounting spring 232 when the temperature sensor 13 is detected and maintained, so that foreign matter will not be blocked between the pitches of the mounting spring 232, so as to prevent the mounting spring 232 from being blocked and unable to shrink normally, and to prevent the blocked mounting spring 232 from blocking the two adjacent mounting plates 23 from approaching each other, thereby ensuring the normal and stable operation of the present invention; and the temperature sensing end of the temperature sensor 13 is pasted with the thermal conductive silicone 131 in order to improve the thermal contact between the temperature sensor 13 and the manifold 21, because the thermal conductive silicone 131 has good thermal conductivity and can quickly transfer the heat from the surface of the manifold 21 to the temperature sensor 13; this enables the temperature sensor 13 to respond to temperature changes more quickly, thereby improving the sensitivity and accuracy of the temperature sensor 13 in measuring temperature; in addition, the thermal conductive silicone 131 also has a certain elasticity, so that the thermal conductive silicone 131 can absorb slight The vibration and mechanical stress of the temperature sensor 13 are reduced, and the influence of slight vibration is reduced, so that the temperature sensor 13 and the manifold 21 are more closely fitted, and the reading of the temperature sensor 13 is more stable and reliable. On the other hand, when the circular plate 241 is pushed by the hydraulic oil and drives the temperature sensor 13 to contact the manifold 21, the temperature sensor 13 drives the thermal conductive silicone 131 to contact the manifold 21, so that the thermal conductive silicone 131 is squeezed by the temperature sensor 13 and is tightly attached to the manifold 21 and deformed to a certain extent, so that the deformed thermal conductive silicone 131 not only increases the contact area between the temperature sensor 13, but also increases the heat conduction area of ​​the thermal conductive silicone 131, and increases the heat conduction path from the manifold 21 to the temperature sensor 13; because heat conduction is carried out through the contact surface, a larger contact area means that more heat is conducted to the temperature sensor 13 by the thermal conductive silicone 131, thereby improving the heat conduction efficiency of the temperature sensor 13, which enables the temperature sensor 13 to respond to temperature changes more quickly, so that the detection accuracy of the temperature sensor 13 is further improved.

[0053] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood 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 cannot be understood as indicating or implying relative importance.

[0054] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A battery module with temperature detection function, comprising: A shell (1), wherein a module end plate (11) and a battery cell (12) are installed inside the shell (1); two groups of the module end plates (11) are provided; the two groups of the module end plates (11) are welded to the inner wall of the shell (1); the battery cell (12) is arranged between the two groups of the module end plates (11); a top cover (2) is fixedly installed on the upper end of the shell (1); and the characteristics are: A busbar (21), the busbar (21) being located between the top cover (2) and the battery cell (12); the busbar (21) being fixedly connected to the top cover (2); the busbar (21) being in contact with the positive and negative electrodes of the battery cell (12); a temperature sensor (13) being installed between the busbar (21) and the top cover (2); the temperature sensor (13) and the top cover (2) being connected via a connecting unit; the connecting unit comprising a fixing bracket (22); a fixing hole (221) being provided on a surface of the fixing bracket (22); a bolt hole directly facing the fixing hole (221) being provided on a side of the top cover (2) close to the battery cell (12); and the temperature sensor (13) being fixedly connected to the fixing bracket (22).

2. A battery module with temperature detection function according to claim 1, characterized in that: The connection unit comprises a mounting plate (23); a groove (231) is provided on a side of the top cover (2) close to 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); and the temperature sensor (13) is installed on a side of the mounting plate (23) away from the groove (231).

3. A battery module with temperature detection function according to claim 2, characterized in that: A screw rod (233) is rotatably connected in the groove (231); threads at both ends of the screw rod (233) are arranged oppositely; the mounting plate (23) is slidably connected in the groove (231); two groups of mounting plates (23) are arranged in the same groove (231); two mounting plates (23) close to the screw rod (233) are spirally connected to the two ends of the screw rod (233); a circular groove (24) is provided on a side of the mounting plate (23) close to the manifold (21); a circular plate (241) is slidably and sealingly connected in the circular groove (24); the temperature sensor (13) is threadedly connected to one 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 screw rod (233).

4. A battery module with temperature detection function according to claim 3, characterized in that: The mounting spring (232) is fixedly connected to one end of the groove (231); a cylindrical groove (26) is provided on a mutually adjacent side of two adjacent groups of mounting plates (23); the cylindrical groove (26) is communicated with the circular groove (24); a push column (261) is connected in a sliding seal in the cylindrical groove (26); two opposite push columns (261) are connected via the mounting spring (232); and the cylindrical groove (26) is filled with hydraulic oil.

5. A battery module with temperature detection function according to claim 4, characterized in that: An oil bag (27) is fixedly connected to a side of the mounting plate (23) that is away from each other; the oil bag (27) is in communication with the circular groove (24); a support spring (271) is installed in the oil bag (27); one end of the support spring (271) is fixedly connected to the inner wall of the oil bag (27), and the other end is fixedly connected to the mounting plate (23).

6. A battery module with temperature detection function according to claim 5, characterized in that: 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) is fixedly connected to an end of the sliding groove (14) away from the handle (25) via a fixing spring (16).

7. A battery module with temperature detection function according to claim 6, characterized in that: A bellows (28) is arranged in the groove (231); the bellows (28) is located between two mounting plates (23); and the mounting spring (232) is located in the bellows (28).

8. A battery module with temperature detection function according to claim 7, characterized in that: A heat-conducting silica gel (131) is adhered to one end of the temperature sensor (13) away from the fixing bracket (22); the temperature sensor (13) is in contact with the busbar (21) via the heat-conducting silica gel (131).

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