A crimping plate and insulation withstand voltage test assembly

Abstract

The embodiment of the present application provides a kind of crimping plate and insulation voltage test component.Crimp plate is used to be stacked with battery module, battery module includes integrated plate and battery cell, along the thickness direction of crimping plate, crimping plate, integrated plate and battery cell are sequentially arranged, crimping plate is used to make integrated plate electrically connected to battery cell, to make multiple battery cell on battery module electrically connected.The embodiment of the present application is replaced by setting crimping plate to replace the welding process of integrated plate and battery cell, saves the time and manpower needed when battery module insulation voltage test is not good to rework to remove battery cell welded in battery module from battery module, and avoids the secondary damage to battery module caused by removing battery cell welded in battery module.

Description

Technical Field

[0001] This application relates, and more particularly to, a crimping plate and an insulation withstand voltage test assembly. Background Technology

[0002] Energy storage batteries, as power sources for various applications, are widely used in electric vehicles and energy storage systems. They are core components of new energy vehicles and energy storage systems, and their performance and safety are receiving increasing attention. Energy storage batteries consist of battery modules. To ensure optimal performance and effectiveness, the integrated boards within the battery module must be electrically connected to the cells, thereby ensuring that all cells in the battery module are electrically connected.

[0003] Most battery modules use welding to connect the integrated board to the battery cells. However, if some of the welded components in the battery module are damaged, the defective welded components need to be removed. This method consumes a lot of manpower and time, and the disassembly process can easily cause secondary damage to the battery module, affecting its use and reducing the overall product quality and production efficiency. Utility Model Content

[0004] This application proposes a crimping plate and an insulation withstand voltage test assembly. By arranging the crimping plate, integrated plate, and battery cells, the integrated plate can be electrically connected to the battery cells. This ensures that all battery cells on the battery module are electrically connected through the integrated plate, guaranteeing the accuracy of subsequent insulation withstand voltage test results. Furthermore, this arrangement replaces the welding process between the integrated plate and the battery cells, saving time and manpower required to remove the welded battery cells from the battery module during rework due to insulation withstand voltage failures. It also avoids secondary damage to the battery module caused by removing the welded battery cells.

[0005] In a first aspect, embodiments of this application propose a pressing plate for being stacked with a battery module. The battery module includes an integrated plate and battery cells. The pressing plate, integrated plate, and battery cells are arranged sequentially along the thickness direction of the pressing plate. The pressing plate is used to electrically connect the integrated plate to the battery cells, so that multiple battery cells on the battery module are electrically connected.

[0006] This application arranges a pressing plate, an integrated plate, and battery cells sequentially along the thickness direction of the pressing plate. The pressing plate is used to press the integrated plate and the battery cells together, enabling the integrated plate to be electrically connected to the battery cells through the pressing function of the pressing plate. This ensures that multiple battery cells on the battery module can be electrically connected through the integrated plate, thereby guaranteeing the accuracy of subsequent insulation withstand voltage tests. Furthermore, by using a pressing plate instead of welding the integrated plate to the battery cells, the application saves time and manpower required to remove the battery cells welded to the battery module during rework when the insulation withstand voltage test fails, and avoids secondary damage to the battery module caused by removing the welded battery cells.

[0007] In one possible implementation, the pressure plate has a first mounting portion extending along the length of the battery module. The first mounting portion includes a first mounting hole and a clamping pin. The first mounting hole penetrates the pressure plate along its thickness and is positioned opposite to the integrated plate. The clamping pin penetrates the first mounting hole and abuts against the integrated plate. By having the clamping pin pass through the first mounting hole and abut against the integrated plate, the pressure of the pressure plate is concentrated at the contact point between the clamping pin and the integrated plate. This ensures that there is always one point of tight contact between the integrated plate and the battery cell, preventing poor local contact between the integrated plate and the battery cell due to uneven surface or minor deformation of the pressure plate, which could affect the electrical connection between them. Furthermore, the clamping pin is an independent component; if the integrated plate or battery cell needs to be replaced, only the clamping pin needs to be removed, without disassembling the entire pressure plate, thus simplifying the installation and disassembly process.

[0008] In one possible implementation, the pressing plate is further provided with a fixing block. The fixing block is located on one side of the pressing plate along its thickness direction and is fixedly connected to the pressing plate. The fixing block has a second mounting hole that penetrates through the fixing block along the thickness direction of the pressing plate. The second mounting hole is opposite to the first mounting hole. The clamping pin is used to pass through the first mounting hole and the second mounting hole to abut against the integrated plate. By setting the fixing block fixed to the pressing plate, the clamping pin passes through the first mounting hole on the pressing plate and the second mounting hole on the fixing block to abut against the integrated plate. The fixing block is used to provide support for the clamping pin to ensure the stability of the clamping pin and prevent the clamping pin from being offset or deformed due to the reaction force of the integrated plate, thereby ensuring the stability of the structure between the entire pressing plate and the battery module.

[0009] In one possible implementation, a first elastic element is provided between the clamping pin and the first mounting hole along a direction perpendicular to the thickness of the clamping plate. The first elastic element is sleeved on the outer circumferential surface of the clamping pin and extends and retracts along the thickness direction of the clamping plate. The clamping pin includes a first pin portion and a second pin portion, which are fixedly connected along the thickness direction of the clamping plate. A platform portion is provided at the connection between the first pin portion and the second pin portion, and the first elastic element is located between the platform portion and the fixing block. By providing a first elastic element that extends and retracts along the thickness direction of the clamping plate between the clamping pin and the first mounting hole, the first elastic element can absorb and disperse energy through its expansion and contraction deformation, allowing the clamping pin to receive the buffer of the elastic force of the first elastic element, preventing damage to the clamping pin or the battery module due to severe vibration. Furthermore, the constraint of the platform portion and the fixing block ensures that the first elastic element is stably positioned between them, preventing the first elastic element from detaching from the clamping pin and causing its buffering capacity to fail, thus guaranteeing the stability of the first elastic element.

[0010] In one possible implementation, along the thickness direction of the pressing plate, the outer peripheral surface of the clamping pin on the side away from the integrated plate is provided with threads and a nut. The nut is rotatably connected to the threads, so that the clamping pin abuts against the integrated plate along the thickness direction of the pressing plate, or moves the clamping pin away from the integrated plate along the thickness direction of the pressing plate. By setting the nut and thread to match, the nut can rotate relative to the thread of the screw, so that the clamping pin can press against the integrated plate or move away from the integrated plate. This allows for adjustment of the clamping degree between the clamping pin and the integrated plate to adapt to different scenarios, ensuring the electrical connection between the integrated plate and the battery cell, and guaranteeing the stability of the overall structure of the pressing plate and the battery module. Furthermore, if the integrated plate or battery cell needs to be replaced, it can be replaced simply by loosening the clamping pin, facilitating installation and disassembly.

[0011] In one possible implementation, the crimping plate includes a second mounting portion extending along the length of the battery module. The second mounting portion and a first mounting portion are spaced apart along the width of the battery module. A positioning hole is provided between the first and second mounting portions, penetrating the crimping plate along its thickness direction and positioned opposite to the integrated plate. By providing a positioning hole penetrating the crimping plate between the first and second mounting portions, the operator can directly observe the integrated plate through the positioning hole and adjust and install the crimping plate according to its position. This ensures precise alignment between the crimping plate and the integrated plate, guaranteeing electrical connection between the integrated plate and all battery cells. This design also improves the installation efficiency of the crimping plate. Furthermore, the positioning hole reduces the material used in the crimping plate and its weight, thereby reducing the installation difficulty for the user.

[0012] In one possible implementation, a limiting plate is provided on the side of the pressing plate near the first mounting part. The limiting plate is connected to the integrated plate and protrudes from the pressing plate in the direction from the pressing plate to the integrated plate. The limiting plate extends along the thickness direction of the pressing plate and along the length direction of the battery module. By setting the limiting plate to protrude from the pressing plate in the direction from the pressing plate to the integrated plate, the pressing plate can quickly determine its installation position on the battery module by the limitation of the limiting plate. This allows the pressing plate to be accurately aligned with the battery module during installation, improving installation efficiency and reducing debugging time during the installation process.

[0013] In one possible implementation, a handle is provided on the side of the pressing plate away from the integrated plate along the thickness direction. The handle is located on one side of the pressing plate along the length direction of the battery module and is fixedly connected to the pressing plate. The handle is inclined along the thickness direction of the pressing plate towards the length direction of the battery module. By providing an inclined handle on the pressing plate, the operator can easily lift or place the pressing handle, thereby facilitating the installation and removal of the pressing plate.

[0014] In one possible implementation, a post is provided at the included angle between two adjacent edges of the pressing plate. The post is fixedly connected to the pressing plate and protrudes from the pressing plate along the direction from the pressing plate to the integrated plate. By providing a post fixedly connected to the pressing plate and protruding from the pressing plate along the direction from the pressing plate to the integrated plate, the post can serve as a reference mark during the installation of the pressing plate. During installation, the pressing plate can be positioned using the post to ensure that the pressing plate is accurately aligned with the position of the battery module, thereby improving the installation efficiency of the pressing plate.

[0015] Secondly, this application provides an insulation withstand voltage test assembly, including an insulation withstand voltage test device and a crimping plate provided in the above embodiments. The crimping plate is used to electrically connect the integrated board to the battery cell. One end of the insulation withstand voltage test device is used to electrically connect to the integrated board, and the other end of the insulation withstand voltage test device is used to electrically connect to the outer casing of the battery module.

[0016] This application incorporates a crimping plate to electrically connect the integrated board to the battery cells via its crimping function, replacing the previous welding and testing process. This eliminates the need for welding, allowing all cells in the battery module to be electrically connected via the integrated board, thus ensuring the accuracy of insulation withstand voltage test results. Furthermore, the crimping plate eliminates the need for multiple individual tests on each cell in the battery module, simplifying the insulation withstand voltage test and improving efficiency. One end of the insulation withstand voltage test equipment is electrically connected to the integrated board, enabling the test equipment to apply high voltage to the integrated board and test its insulation performance under high-voltage conditions. The other end of the test equipment is electrically connected to the battery module's casing, forming a complete test circuit. This allows for a comprehensive evaluation of the overall insulation performance of the battery module, including not only the insulation between the integrated board and the cells but also the insulation between the integrated board and the casing, and between the cells and the casing, ensuring that the battery module meets insulation requirements in all aspects. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a pressure plate and battery module provided in an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of a battery module provided in an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of a battery module with multiple cells provided in an embodiment of this application;

[0020] Figure 4 This is a partial schematic diagram of a crimping plate with a first mounting hole provided in an embodiment of this application;

[0021] Figure 5 This is a partial schematic diagram of an embodiment of the present application, showing a clamping pin passing through a pressing plate;

[0022] Figure 6 This is a schematic diagram of a clamping pin provided in an embodiment of this application;

[0023] Figure 7 This is a partial schematic diagram of a pressing plate and a battery module with a fixing block provided in an embodiment of this application;

[0024] Figure 8 This is a schematic diagram of a fixing block having a first fixing hole and a connecting pin provided in an embodiment of this application;

[0025] Figure 9 This is a partial schematic diagram of a pressing plate with a second fixing hole provided in an embodiment of this application;

[0026] Figure 10 It is a cross-sectional view of a pressing plate and a battery module having a first elastic element provided in the embodiment;

[0027] Figure 11 This is a cross-sectional view of a clamping pin with a second elastic element and a battery module provided in an embodiment of this application;

[0028] Figure 12 This is a schematic diagram of a clamping pin with a nut provided in an embodiment of this application;

[0029] Figure 13 This is a schematic diagram of a clamping pin that matches the thread and nut provided in an embodiment of this application;

[0030] Figure 14 This is a schematic diagram of a pressing plate and a battery module with positioning holes provided in an embodiment of this application;

[0031] Figure 15 This is another schematic diagram of the press plate and battery module with positioning holes improved by the embodiments of this application;

[0032] Figure 16 This is a schematic diagram of a pressing plate with a limiting plate and a battery module provided in an embodiment of this application;

[0033] Figure 17 This is a schematic diagram of a pressing plate provided in an embodiment of this application;

[0034] Figure 18 This is a schematic diagram of an insulation withstand voltage test assembly and a battery module provided in an embodiment of this application.

[0035] Figure Labels

[0036] 100 - Crimping plate; 200 - Battery module; 300 - Insulation withstand voltage testing equipment;

[0037] 10-First mounting part; 20-Integrated board; 30-Battery cell; 40-Second mounting part; 50-Positioning hole; 60-Limiting plate; 70-Handle; 80-Post; 90-Explosion-proof hole; 11-Pressure pin; 12-First mounting hole; 13-Fixing block; 14-Second fixing hole; 21-Short circuit; 31-Positive terminal; 32-Negative terminal; 41-Third mounting hole; 111-First elastic element; 112-First pin; 113-Second pin; 114-Second elastic element; 115-Nut; 116-Thread; 131-Second mounting hole; 132-First fixing hole; 133-Connecting pin; 1121-Platform part. Detailed Implementation

[0038] The embodiments of this application are described below with reference to the accompanying drawings.

[0039] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0040] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0041] It should be understood that the term "and / or" used in this document is merely a description of the same field in the related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0042] It should be understood that the terms "first," "second," etc., used in this application are for distinguishing purposes only and should not be construed as indicating or implying relative importance or order.

[0043] In the description of this application, the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not 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 limitations on this application.

[0044] It should be understood that in this application, "electrical connection" can be understood as physical contact and electrical conduction between components; it can also be understood as the form in which different components in a circuit structure are connected through physical lines that can transmit signals, such as copper foil or wires on a printed circuit board (PCB). "Connection" and "connected" can both refer to a mechanical or physical connection relationship. For example, A and B being connected or A and B being connected can mean that there are fastening components (such as screws, bolts, rivets, etc.) between A and B, or that A and B are in contact with each other and are difficult to separate.

[0045] Energy storage batteries, as power sources for various applications, are widely used in electric vehicles and energy storage systems, serving as core components of these systems. Energy storage batteries offer advantages such as high performance, lightweight design, and long lifespan; therefore, their performance and safety are receiving increasing attention. Energy storage batteries consist of battery modules. To ensure optimal performance and effectiveness, the integrated circuit board within the battery module must be electrically connected to the battery cells, thereby ensuring that all cells within the battery module are electrically connected.

[0046] Most battery modules use welding to connect the integrated board to the battery cells. However, if some of the welded components in the battery module are damaged, the defective welded components need to be removed and replaced. This method consumes a lot of manpower and time, and the disassembly process can easily cause secondary damage to the battery module, affecting its use and reducing the overall product quality and production efficiency.

[0047] To address the aforementioned issues, firstly, this application provides a pressure plate and battery module withstand voltage testing assembly. By arranging the pressure plate, the battery module's integrated board, and the battery module's cells, the integrated board is electrically connected to the battery module's cells. This allows for electrical connection between multiple cells without soldering the integrated board into a casing, ensuring current transmission between cells, guaranteeing the accuracy of test results, and preventing poor contact between the integrated board and the cells from affecting the accuracy of the test results. Furthermore, if there are defective components in the battery module, only the pressure plate needs to be removed for disassembly and replacement, facilitating the disassembly and assembly of the battery module.

[0048] Figure 1 This is a schematic diagram of a pressure plate and battery module provided in an embodiment of this application. Figure 2 This is a schematic diagram of a battery module provided in an embodiment of this application. Figure 3 This is a schematic diagram of a battery module with multiple cells provided in an embodiment of this application, combined with... Figure 1 , Figure 2 and Figure 3As shown, the battery module 200 may include an integrated board 20 and multiple battery cells 30, which can be arranged sequentially along the length of the battery module 200. Each battery cell 30 includes a positive terminal 31 and a negative terminal 32. Any two adjacent cells are placed parallel to each other in opposite directions. Schematic, the positive terminal 31 of one battery cell 30 is flush with or opposite to the negative terminal 32 of any adjacent battery cell 30, and the negative terminal 32 of one battery cell 30 is flush with or opposite to the positive terminal 31 of any adjacent battery cell 30. The multiple battery cells 30 are used to store energy. When the battery module 200 is charging, electrical energy drives ions to migrate from the positive terminal to the negative terminal and store energy; when the battery module 200 is discharging, ions migrate in the opposite direction and release electrical energy to power external devices. The battery module 200 can be used in electronic products, such as terminal devices and electric vehicles, to provide power.

[0049] The integrated board 20 is used to electrically connect multiple cells 30 to realize the series and parallel combination of cells 30, thereby meeting the requirements of high voltage and large capacity and improving the performance of the battery module 200.

[0050] Specifically, the integrated board 20 includes a shorting bar 21, which is used to bridge the positive terminal 31 and negative terminal 32 of two adjacent cells 30 within the same battery module 200. The positive terminal 31 of one cell 30 is flush with or opposite to the negative terminal 32 of any adjacent cell. The shorting bar 21 is electrically connected to the positive terminal 31 of one cell 30, and also electrically connected to the negative terminal 32 of any adjacent cell 30, thus enabling the positive terminal 31 of one cell 30 to be electrically connected to the negative terminal 32 of any adjacent cell 30. By forming electrical connections between multiple shorting bars 21 and multiple sets of positive and negative terminals 31 and 32 of adjacent cells 30, multiple cells 30 are electrically connected to each other, thereby enabling series or parallel connection of multiple cells 30, which is beneficial for the efficient output of electrical energy from the battery module 200. Schematic illustration: the shorting busbar 21 can be made of copper or aluminum. The surface of the shorting busbar 21, except for the area connected to the positive terminal 31 or negative terminal 32 of the battery cell 30, can be nickel-plated, tin-plated, or coated with an insulating layer to improve its conductivity, corrosion resistance, and solderability. It is understood that the number of shorting busbars 21 can be set according to the number of battery cells 30 to ensure that all battery cells 30 can be electrically connected through the shorting busbars 21.

[0051] This application provides a pressure plate 100, combined with... Figure 1 , Figure 2 and Figure 3As shown, the pressing plate 100 and the battery module 200 are stacked together so that the pressing plate 100 presses the battery module 200, thereby electrically connecting the battery cell 30 and the integrated board 20 within the battery module 200. Specifically, along the thickness direction of the pressing plate 100, the pressing plate 100, the integrated board 20, and the battery cell 30 are arranged sequentially. The pressing plate 100 is used to press the integrated board 20 and the battery cell 30, so that the integrated board 20 can be electrically connected to the battery cell 30 through the pressing function of the pressing plate 100. This ensures that multiple battery cells 30 on the battery module 200 can be electrically connected through the integrated board 20, thus ensuring the accuracy of subsequent insulation withstand voltage tests.

[0052] In one possible implementation, the pressing plate 100 is provided with multiple pressing structures, each pressing structure corresponding one-to-one with each terminal of each battery cell 30. Furthermore, the pressing structures are located on the same side of the integrated plate 20 and the battery cell 30 along the thickness direction of the pressing plate 100, ensuring that each pressing structure can press each battery cell 30 and the integrated plate 20 tightly, thereby achieving electrical connection between the battery cell 30 and the integrated plate 20. In another possible implementation, the pressing plate 100 is made of bakelite, which has insulating properties to prevent leakage or short circuits between the pressing plate 100 and the integrated plate 20, further improving the safety and stability of the battery module 200.

[0053] In one possible implementation, this application embodiment also adjusts the process sequence of the battery module insulation withstand voltage test. The insulation withstand voltage test originally needed to be performed after the integrated board 20 was soldered into the casing; this application moves the insulation withstand voltage test to before the soldering of the integrated board 20. This arrangement saves time and manpower required to remove the battery cells 30 from the battery module 200 when reworking due to insulation withstand voltage failure, and avoids secondary damage to the battery module 200 when removing the battery cells 30, thus improving the utilization rate of the battery module 200. After the test procedure is changed, to ensure the accuracy of the insulation withstand voltage test results, the integrated board 20 and the battery cells in the battery module 200 need to be pressed tightly together to ensure that all the battery cells 30 on the battery module 200 can be electrically connected through the integrated board 20.

[0054] This application first places the integrated board 20 of the battery module 200 on the upper surface of the cell 30, and then installs the pressing plate 100. The pressing plate 100 is used to press the integrated board 20 and the cell 30 to ensure electrical connection between them, thereby ensuring electrical connection between all the cells 30 on the battery module 200. Finally, an insulation withstand voltage test device is connected to the battery module 200 to complete the insulation withstand voltage test. If the insulation withstand voltage test is unsuccessful, the pressing plate 100 and the integrated board 20 can be removed to find the defect in the battery module 200 and repair it accordingly. This method can replace the welding process of the cell 30 and the integrated board 20, realizing the electrical connection between the cell 30 and the integrated board 20. It also avoids the waste of time and manpower caused by disassembling the welded cell 30 and the integrated board 20, and avoids secondary damage to the battery module 200 caused by violent removal.

[0055] In this embodiment, a pressing plate 100, an integrated plate 20, and a battery cell 30 are arranged sequentially along the thickness direction of the pressing plate 100. The pressing plate 100 is used to press the integrated plate 20 and the battery cell 30 together, enabling the integrated plate 20 to be electrically connected to the battery cell 30 through the pressing function of the pressing plate 100. This ensures that multiple battery cells 30 on the battery module 200 can be electrically connected through the integrated plate 20, thereby guaranteeing the accuracy of subsequent insulation withstand voltage tests. Furthermore, by using the pressing plate 100 instead of the welding process between the integrated plate 20 and the battery cell 30, the time and manpower required to remove the battery cell 30 welded to the battery module 200 during rework due to poor insulation withstand voltage testing are saved, and secondary damage to the battery module 200 caused by removing the battery cell 30 welded to the battery module 200 is avoided.

[0056] Figure 4 This is a partial schematic diagram of a crimping plate with a first mounting hole provided in an embodiment of this application. Figure 5 This is a partial schematic diagram of an embodiment of the present application, showing a clamping pin passing through a pressing plate. Figure 6 This is a schematic diagram of a clamping pin provided in an embodiment of this application, combined with... Figure 4 , Figure 5 and Figure 6 As shown, in one possible embodiment, the pressing plate 100 has a first mounting portion 10 extending along the length of the battery module 200 to ensure that the first mounting portion 10 can cover the integrated plate 20, thereby ensuring that the pressing plate 100 can press the integrated plate 20 and all the battery cells 30 together. The first mounting portion 10 is provided with a first mounting hole 12 and a clamping pin 11. The first mounting hole 12 is used to penetrate the pressing plate 100 along the thickness direction and is disposed opposite to the integrated plate 20 so that the clamping pin 11 can pass through the first mounting hole 12 and abut against the integrated plate 20.

[0057] By allowing the clamping pin 11 to pass through the first mounting hole 12 and abut against the integrated plate 20, the pressure of the pressing plate 100 is concentrated at the contact point between the clamping pin 11 and the integrated plate 20. This ensures that there is always one point of contact between the integrated plate 20 and the battery cell 30, preventing poor local contact between the integrated plate 20 and the battery cell 30 due to uneven surface or slight deformation of the pressing plate 100, which would affect the electrical connection between the two. Furthermore, since the clamping pin 11 is an independent component, if the integrated plate 20 or the battery cell 30 needs to be replaced, only the clamping pin 11 needs to be removed, without disassembling the entire pressing plate 100, thus simplifying the installation and disassembly process.

[0058] In another possible implementation, the crimping plate 100 is further provided with a second mounting portion 40, which extends along the length of the battery module 200. The first mounting portion 10 and the second mounting portion 40 are respectively located on both sides of the crimping plate 100 near its long edge, that is, along the width direction of the battery module 200, the first mounting portion 10 and the second mounting portion 40 are respectively located on both sides of the cell 30 near the terminal post. The second mounting portion 40 is provided with a third mounting hole 41 and a clamping pin 11, which is used to pass through the third mounting hole 41 and abut against the integrated plate 20. By providing the clamping pin 11, which can pass through the first mounting hole 12 and the third mounting hole 41 respectively and abut against the integrated plate 20, it is ensured that the integrated plate 20 is in close contact with the positive terminal post 31 and the negative terminal post 32 of the cell 30, thereby ensuring that all cells 30 on the battery module 200 can be electrically connected through the integrated plate 20, thus ensuring the accuracy of the subsequent insulation withstand voltage test results.

[0059] In another possible implementation, the number of clamping pins 11 can be set according to the number of positive terminals 31 and negative terminals 32 in the battery module 200, so that each positive terminal 31 can correspond to at least one clamping pin 11, and each negative terminal 32 can also correspond to at least one clamping pin 11. The clamping pins 11 can clamp each terminal to the integrated plate 20, thereby enabling all cells 30 on the battery module 200 to be electrically connected. In another possible implementation, the diameter of the first mounting hole 12 is less than or equal to the diameter of the clamping pin 11, so that the clamping pin 11 is interference-fitted with the first mounting hole 12, ensuring the stability of the clamping pin 11 within the first mounting hole 12, thereby ensuring the stability of the structure of the pressing plate 100 and the battery module 200.

[0060] Another possible implementation, combined with Figure 5 and Figure 6As shown, the clamping pin 11 includes a first pin portion 112 and a second pin portion 113. The diameter of the first pin portion 112 is smaller than the diameter of the second pin portion 113, and the two are fixedly connected to each other, so that a platform portion 1121 is formed between the first pin portion 112 and the second pin portion 113. The diameter of the first mounting hole 12 is smaller than the diameter of the second pin portion 113, so that after the first pin portion 112 passes through the first mounting hole 12, the pressing plate 100 can abut against the platform portion 1121, thereby ensuring the stability of the relative position between the clamping pin 11 and the pressing plate 100. Furthermore, the pressing plate 100 can also transmit pressure to the clamping pin 11 by abutting against the platform portion 1121, so that the clamping pin 11 abuts against the integrated plate 20, thereby electrically connecting the integrated plate 20 to the battery cell 30. In another possible implementation, the second pin 113 has a certain length in a direction perpendicular to its diameter, so that the pressing plate 100 is spaced apart from the integrated plate 20, and the pressure of the pressing plate 100 is concentrated at the clamping pin 11. Furthermore, each terminal post on the battery module 200 corresponds to at least one clamping pin 11, thereby ensuring that the integrated plate 20 and each terminal post on the battery module 200 are in abutting contact, so that all cells 30 on the battery module 200 are electrically connected. At the same time, the spaced arrangement between the pressing plate 100 and the integrated plate 20 also provides a certain amount of heat dissipation space for the battery module 200, preventing localized overheating of the battery module 200 due to the pressing plate 100 being in close contact with the integrated plate 20, which would affect the service life of the battery module 200.

[0061] Figure 7 This is a partial schematic diagram of a pressing plate with a fixing block and a battery module provided in an embodiment of this application. Figure 8 This is a schematic diagram of a fixing block with a first fixing hole and a connecting pin provided in an embodiment of this application, in conjunction with... Figure 7 and Figure 8 As shown, in one possible embodiment, the pressing plate 100 is further provided with a fixing block 13. The fixing block 13 is located on one side of the pressing plate 100 along its thickness direction and is fixedly connected to the pressing plate 100. The fixing block 13 has a second mounting hole 131 through the fixing block 13 along the thickness direction of the pressing plate 100. The second mounting hole 131 is arranged opposite to the first mounting hole 12 so that the clamping pin 11 can pass through the first mounting hole 12 and the second mounting hole 131 and abut against the integrated plate 20. The fixing block 13 is used to provide support and positioning for the clamping pin 11, to prevent the clamping pin 11 from being offset or deformed by the reaction force of the integrated plate 20, and to ensure the stability of the structure between the entire pressing plate 100 and the battery module 200.

[0062] In another possible implementation, the portion of the fixing block 13 near the middle of the second mounting hole 131 protrudes from the fixing block 13, so that the second mounting hole 131 has sufficient height to fix the clamping pin 11. The height of the sides of the fixing block 13 away from the second mounting hole 131 is lower than the height of the portion of the fixing block 13 near the middle of the second mounting hole 131, so that the fixing block 13 is convex. This arrangement can save material for the fixing block 13 and reduce the weight of the fixing block 13, thereby reducing the overall weight of the pressing plate 100. It is understood that the height direction of the fixing block 13 is the thickness direction of the pressing plate 100.

[0063] In another possible implementation, Figure 9 This is a partial schematic diagram of a crimping plate with a second fixing hole provided in an embodiment of this application, in conjunction with... Figure 7 , Figure 8 and Figure 9 As shown, the fixing block 13 includes a first fixing hole 132 and a connecting pin 133, and the pressing plate 100 includes a second fixing hole 14. The first fixing hole 132 is located on one side of the second mounting hole 131 along the length direction of the battery module 200, and the first fixing hole 132 extends through the fixing block 13 along the thickness direction of the pressing plate 100 and is opposite to the second fixing hole 14. The connecting pin 133 is used to pass through the first fixing hole 132 and extend into the second fixing hole 14 on the pressing plate 100, so that the fixing block 13 is fixed to the pressing plate 100. It can be understood that each fixing block 13 includes at least two first fixing holes 132, and at least two first fixing holes 132 are located on both sides of the second mounting hole 131 along the length direction of the battery module 200. Schematic, each fixing block 13 is provided with two first fixing holes 132, and the two first fixing holes 132 are respectively located on both sides of the second mounting hole 131. The number of connecting pins 133 can be set according to the actual number of first fixing holes 132 to ensure that at least one connecting pin 133 can be inserted into each first fixing hole 132, thereby ensuring that the fixing block 13 can be stably fixed on the pressing plate 100 and preventing the fixing block 13 from rotating relative to the pressing plate 100 due to fixing a single pin hole. It can be understood that the second fixing holes 14 correspond one-to-one with the first fixing holes 132, and each first fixing hole 132 is opposite to one second fixing hole 14 to ensure that the connecting pin 133 can extend into the second fixing hole 14 through the first fixing hole 132 to complete the stable fixing of the pressing plate 100 and the fixing block 13.

[0064] Figure 10 This is a cross-sectional view of a pressing plate with a first elastic element and a battery module provided in the embodiment, combined with... Figure 10As shown, in one possible implementation, a first elastic element 111 is provided between the clamping pin 11 and the first mounting hole 12 along a direction perpendicular to the thickness of the pressing plate 100. The first elastic element 111 is sleeved on the outer peripheral surface of the clamping pin 11. The first elastic element 111 extends and retracts along the thickness direction of the pressing plate 100, so that when the clamping pin 11 is subjected to an external impact, the first elastic element 111 can absorb and disperse energy through extension and retraction deformation. The clamping pin 11 can receive the buffer of the elastic force of the first elastic element 111, preventing damage to the clamping pin 11 or the battery module 200 due to severe vibration. The first pin portion 112 and the second pin portion 113 of the clamping pin 11 are fixedly connected along the thickness direction of the pressing plate 100, and the diameter of the first pin portion 112 is smaller than the diameter of the second pin portion 113, so that the connection between the first pin portion 112 and the second pin portion 113 has a platform portion 1121. The first elastic element 111 is located between the platform portion 1121 and the fixing block 13, so that the first elastic element 111 can play its buffering role in the first mounting hole 12 under the constraint of the platform portion 1121 and the fixing block 13, so as to ensure the stability of the position of the first elastic element 111 and prevent the first elastic element 111 from disengaging from the clamping pin 11 and causing its buffering ability to fail.

[0065] Another possible implementation, Figure 11 This is a cross-sectional view of a clamping pin with a second elastic element and a battery module provided in the embodiments of this application, combined with... Figure 11 As shown, along the thickness direction of the pressing plate 100, a second elastic element 114 is provided at one end of the pressing pin 11 near the integrated plate 20. The second elastic element 114 is located between the pressing pin 11 and the integrated plate 20, and is used to elastically abut against the integrated plate 20 through the first mounting hole 12. The second elastic element 114 is elastic along the thickness direction of the pressing plate 100, and can undergo elastic deformation when pressure is applied by the pressing pin 11, thereby filling the tiny gap between the integrated plate 20 and the surface of the cell 30, further enhancing the fit between the integrated plate 20 and the cell 30, ensuring that multiple cells 30 on the battery module 200 can be electrically connected through the integrated plate 20, thereby ensuring the accuracy of the insulation withstand voltage test results. It is understood that the second elastic element 114 is made of insulating material to avoid short circuit of the battery assembly caused by contact between the integrated plate 20 and the second elastic element 114.

[0066] Figure 12 This is a schematic diagram of a clamping pin with a nut provided in an embodiment of this application. Figure 13 This is a schematic diagram of a clamping pin that matches the thread and nut provided in the embodiments of this application, combined with... Figure 12 and Figure 13As shown, in one possible implementation, along the thickness direction of the pressing plate 100, the outer peripheral surface of the pressing pin 11 on the side away from the integrated plate 20 is provided with a thread 116 and a nut 115. The nut 115 is rotatably connected to the thread 116 so that the pressing pin 11 abuts against the integrated plate 20. Specifically, by matching the nut 115 and the thread 116, the degree of clamping between the pressing pin 11 and the integrated plate 20 can be adjusted according to different battery modules 200 and test scenarios to ensure the electrical connection between the integrated plate 20 and the battery cell 30. Furthermore, if the integrated plate 20 or the battery cell 30 needs to be replaced, only the pressing pin 11 needs to be loosened, facilitating installation and disassembly. In this implementation, when the nut 115 rotates relative to the thread 116 of the screw, the nut 115 moves along the thickness direction of the pressing plate 100 towards the clamping pin 11 and closer to the integrated plate 20. This allows the nut 115 to provide pressure to the fixing block 13, which clamps the pressing plate 100. The pressing plate 100 abuts against the platform portion 1121 on the clamping pin 11, thereby transmitting pressure to the clamping pin 11. This allows the clamping pin 11 to abut against the integrated plate 20, further enhancing the fit between the integrated plate 20 and the battery cell 30. This ensures that multiple battery cells 30 on the battery module 200 can be electrically connected through the integrated plate 20, guaranteeing the accuracy of the insulation withstand voltage test results. When the nut 115 rotates in the opposite direction relative to the thread 116 of the screw, the nut 115 can move relative to the clamping pin 11 along the thickness direction of the pressing plate 100 away from the integrated plate 20, facilitating the disassembly of the clamping pin 11. Furthermore, the setting of nut 115 and thread 116 can also adjust the clamping degree between clamping pin 11 and integrated plate 20 to adapt to the structure of battery module 200 of different sizes.

[0067] Figure 14 This is a schematic diagram of a pressing plate with positioning holes and a battery module provided in an embodiment of this application. Figure 15 This is another schematic diagram of the pressure plate with positioning holes and the battery module improved by the embodiments of this application, combined with Figure 14 and Figure 15As shown, in one possible implementation, the second mounting portion 40 of the pressing plate 100 and the first mounting portion 10 are spaced apart along the width direction of the battery module 200. A positioning hole 50 is provided between the first mounting portion 10 and the second mounting portion 40. The positioning hole 50 is used to penetrate the pressing plate 100 along the thickness direction and is positioned opposite to the integrated plate 20, so that the operator can directly observe the position of the integrated plate 20 through the positioning hole 50. During the installation of the pressing plate 100, the position of the integrated plate 20 can be observed in real time through the positioning hole 50 to ensure that the pressing plate 100 and the integrated plate 20 are aligned. Thus, through the pressing of the pressing plate 100, all the cells 30 in the battery module 200 can be electrically connected through the integrated plate 20, thereby ensuring the accuracy of the insulation withstand voltage test and improving the installation efficiency of the pressing plate 100. In addition, the positioning hole 50 can also reduce the amount of material used in the pressing plate 100, thereby effectively reducing the weight of the pressing plate 100 and reducing the installation difficulty for the user. It is understandable that the width direction of the battery module 200 is the direction of the straight line from the positive terminal 31 of a cell 30 to the negative terminal 32 of that cell 30.

[0068] In another possible implementation, the diameter of the positioning hole 50 is larger than the diameter of the first mounting hole 12 to ensure the positioning effect of the positioning hole 50 and reduce the weight of the pressing plate 100 itself. In another possible implementation, the number of positioning holes 50 includes at least two, and these at least two positioning holes 50 are evenly spaced along the length of the battery module 200, so that the pressure can be evenly distributed on the pressing plate 100, avoiding excessive local pressure that could damage the pressing plate 100 and enhancing the overall structural stability of the pressing plate 100. Simultaneously, multiple positioning holes 50 can be positioned from different locations along the length of the battery module 200, allowing the pressing plate 100 to be accurately installed on the integrated plate 20, preventing the pressing effect between the integrated plate 20 and the battery cell 30 from being affected by positional misalignment of the pressing plate 100.

[0069] In another possible implementation, the battery module 200 also includes an explosion-proof hole 90, and the positioning hole 50 is connected to the explosion-proof hole 90. When the internal pressure or temperature of the battery module 200 is too high, the explosion-proof hole 90 can automatically rupture or open to release the internal gas and electrolyte. The released gas and electrolyte can be discharged through the positioning hole 50, thereby preventing the battery module 200 from exploding.

[0070] Figure 16 This is a schematic diagram of a pressing plate with a limiting plate and a battery module provided in an embodiment of this application, combined with... Figure 16As shown, in one possible implementation, a limiting plate 60 is provided on the side of the pressing plate 100 near the first mounting portion 10. The limiting plate 60 is connected to the integrated plate 20. The limiting plate 60 protrudes from the pressing plate 100 in the direction from the pressing plate 100 to the integrated plate 20, extends along the thickness direction of the pressing plate 100, and extends along the length direction of the battery module 200. The limiting plate 60 is used to limit the position of the pressing plate 100 on the battery module 200, so that the pressing plate 100 can be accurately aligned with the battery module 200 during installation, thereby improving the installation efficiency of the pressing plate 100 and reducing the debugging time during the installation process.

[0071] In another possible implementation, the limiting plate 60 includes two plates, which are respectively disposed on both sides of the pressing plate 100 along the width direction of the battery module 200. This allows the pressing plate 100 to be quickly aligned with the battery module 200 and installed according to the limiting plates 60 on both sides during installation, thereby improving the accuracy of the pressing plate 100 installation positioning and improving the installation efficiency of the pressing plate 100.

[0072] Another possible implementation, Figure 17 This is a schematic diagram of a pressing plate provided in an embodiment of this application, combined with... Figure 17 As shown, the pin passes through the pin hole on the limiting plate 60 along the width direction of the battery module 200 and extends into the pressing plate 100, so that the limiting plate 60 can be fixed to the pressing plate 100. It can be understood that the number of pin holes and pins on the limiting plate 60 can be set according to the actual situation, and each pin hole can correspond to at least one pin to ensure that the limiting plate 60 can be stably fixedly connected to the pressing plate 100.

[0073] Combination Figure 17 As shown, in one possible implementation, a handle 70 is provided on the side of the pressing plate 100 away from the integrated plate 20 along the thickness direction. The handle 70 is located at one end of the pressing plate 100 along the length direction of the battery module 200 and is used to fix it to the pressing plate 100, allowing the operator to lift or place the pressing plate 100 using the handle 70. The handle 70 is inclined along the thickness direction of the pressing plate 100 towards the length direction of the battery module 200, and this inclination direction matches the direction of force applied by the operator, allowing the operator to easily lift or place the pressing handle 70, thereby facilitating the installation and removal of the pressing plate 100.

[0074] Combination Figure 17As shown, in another possible embodiment, the screw can pass through the handle 70 along the thickness direction of the crimping plate 100 and extend into the crimping plate 100, so that the handle 70 is fixed to the crimping plate 100. In another possible embodiment, there are two handles 70, which are located at opposite ends of the crimping plate 100 along the length direction of the battery module 200. The operator can lift or place the crimping plate 100 by holding the two handles 70, thereby ensuring the stability of the crimping plate 100 during installation and removal.

[0075] Combination Figure 17 As shown, in one possible implementation, a column 80 is provided at the included angle between two adjacent edges of the pressing plate 100. The column 80 is fixedly connected to the pressing plate 100 and protrudes from the pressing plate 100 along the direction from the pressing plate 100 to the integrated plate 20. The column 80 can serve as a reference mark when the pressing plate 100 is installed. During installation, the pressing plate 100 can be positioned by the column 80 to ensure that the pressing plate 100 can be accurately aligned with the position of the battery module 200, thereby improving the installation efficiency of the pressing plate 100.

[0076] In another possible implementation, there are four columns 80, located at the four corners of the pressing plate 100. The four columns 80 are of equal length along the thickness direction of the pressing plate 100, providing a stable base for the pressing plate. When the pressing plate 100 is not in use, it can be stably placed by the four columns 80 contacting the placement surface. Furthermore, the columns 80 ensure sufficient clearance between the pressing plate 100 and the placement surface, preventing direct contact and friction between the surface of the pressing plate 100 and the placement surface, thus avoiding wear and protecting the performance of the pressing plate 100.

[0077] Secondly, Figure 18 This is a schematic diagram of an insulation withstand voltage test assembly and a battery module provided in an embodiment of this application, combined with... Figure 18 As shown in the figure, this application embodiment proposes an insulation withstand voltage test assembly, including an insulation withstand voltage test device 300 and a crimping plate 100 provided in the above embodiment. The crimping plate 100 is used to electrically connect the integrated board 20 to the battery cell 30. One end of the insulation withstand voltage test device 300 is used to electrically connect to the integrated board 20, and the other end of the insulation withstand voltage test device 300 is used to electrically connect to the outer casing of the battery module 200.

[0078] By setting up a crimping plate 100, the integrated board 20 can be electrically connected to the battery cell 30 through the crimping function of the crimping plate 100, replacing the previous welding and testing process. All battery cells 30 on the battery module 200 can be electrically connected through the integrated board 20 without welding, thus ensuring the accuracy of the insulation withstand voltage test results. Simultaneously, the crimping plate 100 eliminates the need for the insulation withstand voltage testing equipment 300 to perform multiple individual tests on each battery cell 30 on the battery module 200, thereby simplifying the complexity of the insulation withstand voltage test and improving testing efficiency. One end of the insulation withstand voltage testing equipment 300 is electrically connected to the integrated board 20, allowing the testing equipment to apply high voltage to the integrated board 20 and test its insulation performance under high voltage conditions. The other end of the testing equipment is electrically connected to the casing of the battery module 200, forming a complete test circuit. This allows for a comprehensive assessment of the overall insulation performance of the battery module 200, including not only the insulation between the integrated board 20 and the battery cell 30, but also the insulation between the integrated board 20 and the casing, the battery cell 30 and the casing, and other parts where insulation problems may exist, ensuring that the battery module 200 meets insulation requirements in all aspects.

[0079] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. 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. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A pressure plate for being stacked with a battery module, characterized in that, The battery module includes an integrated plate and battery cells. The pressure plate, the integrated plate, and the battery cells are arranged sequentially along the thickness direction of the pressure plate. The pressure plate is used to electrically connect the integrated plate to the battery cells, so that multiple battery cells on the battery module are electrically connected.

2. The pressing plate according to claim 1, characterized in that, The pressing plate has a first mounting portion that extends along the length of the battery module. The first mounting portion is provided with a first mounting hole and a clamping pin. The first mounting hole is used to penetrate the pressing plate along the thickness direction of the pressing plate and is disposed opposite to the integrated plate. The clamping pin is used to penetrate the first mounting hole and abut against the integrated plate.

3. The pressing plate according to claim 2, characterized in that, The pressing plate is also provided with a fixing block, which is located on one side of the pressing plate along its thickness direction and is fixedly connected to the pressing plate. The fixing block is provided with a second mounting hole through the fixing block along the thickness direction of the pressing plate. The second mounting hole is arranged opposite to the first mounting hole. The clamping pin is used to pass through the first mounting hole and the second mounting hole and abut against the integrated plate.

4. The pressing plate according to claim 3, characterized in that, Along the direction perpendicular to the thickness of the pressing plate, a first elastic element is provided between the pressing pin and the first mounting hole. The first elastic element is sleeved on the outer peripheral surface of the pressing pin and extends and retracts along the thickness of the pressing plate. The pressing pin includes a first pin portion and a second pin portion. The first pin portion and the second pin portion are fixedly connected along the thickness of the pressing plate. A platform portion is provided at the connection between the first pin portion and the second pin portion. The first elastic element is located between the platform portion and the fixing block.

5. The pressing plate according to claim 2, characterized in that, Along the thickness direction of the pressing plate, the outer peripheral surface of the pressing pin on the side away from the integrated plate is provided with a thread and a nut. The nut is rotatably connected to the thread so that the pressing pin abuts against the integrated plate along the thickness direction of the pressing plate, or so that the pressing pin moves away from the integrated plate along the thickness direction of the pressing plate.

6. The pressing plate according to claim 2, characterized in that, The pressing plate includes a second mounting portion, which extends along the length direction of the battery module. The second mounting portion and the first mounting portion are spaced apart along the width direction of the battery module. A positioning hole is provided between the first mounting portion and the second mounting portion. The positioning hole is used to penetrate the pressing plate along the thickness direction of the pressing plate, and the positioning hole is opposite to the integrated plate.

7. The pressing plate according to claim 2, characterized in that, A limiting plate is provided on the side of the pressing plate near the first mounting part. The limiting plate is connected to the integrated plate. The limiting plate protrudes from the pressing plate in the direction from the pressing plate to the integrated plate. The limiting plate extends in the thickness direction of the pressing plate and in the length direction of the battery module.

8. The pressing plate according to claim 1, characterized in that, Along the thickness direction of the pressing plate, a handle is provided on the side of the pressing plate away from the integrated plate. The handle is located at one end of the pressing plate along the length direction of the battery module and is fixedly connected to the pressing plate. The handle is inclined along the thickness direction of the pressing plate towards the length direction of the battery module.

9. The pressing plate according to claim 1, characterized in that, A column is provided at the included angle between two adjacent edges of the pressing plate. The column is fixedly connected to the pressing plate and protrudes from the pressing plate along the direction from the pressing plate to the integrated plate.

10. An insulation withstand voltage test assembly, characterized in that, The device includes an insulation withstand voltage test device and a crimping plate as described in any one of claims 1-9, wherein the crimping plate is used to electrically connect the integrated board to the battery cell, one end of the insulation withstand voltage test device is used to electrically connect to the integrated board, and the other end of the insulation withstand voltage test device is used to electrically connect to the casing of the battery module.

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