Battery cell testing device

Abstract

The utility model provides a battery cell testing device which comprises a testing structure, the testing structure comprises a clamping piece, the clamping piece comprises a first clamping plate, a second clamping plate and a third clamping plate, the second clamping plate is located between the first clamping plate and the third clamping plate, and a battery cell clamping area is defined between the first clamping plate and the second clamping plate; the first sensor is abutted between the second clamping plate and the third clamping plate; the connecting piece is used for connecting the first clamping plate, the second clamping plate and the third clamping plate, and the second clamping plate can move or deform between the first clamping plate and the third clamping plate relative to the connecting piece; and when the battery cell in the battery cell clamping area expands, the first sensor generates data that the second clamping plate moves or deforms towards the third clamping plate. According to the application, the expansion force of the battery cell can be determined through the detection data of the first sensor, so that a structure matched with the expansion force of the battery cell can be effectively set during subsequent design of a module structure.

Description

Technical Field

[0001] This application relates to the field of battery cell testing equipment technology, and more specifically, to a battery cell testing equipment. Background Technology

[0002] During charge-discharge cycles, the battery cell expands continuously due to internal chemical reactions and physical changes. However, once assembled into a module, the cell is confined by the module casing and cannot expand further, leading to increasing expansion force. Towards the end of the module's lifespan, if the cell's expansion force exceeds the module casing's confining force, the module may deform or even fall apart, ultimately causing a short circuit or even an explosion.

[0003] Therefore, it is necessary to test the changes in the expansion force of the battery cell throughout its entire life cycle in the early stages of the design process to provide empirical basis for the module structure design.

[0004] In related technologies, the expansion force data of the battery cell under several states is obtained by manually measuring the thickness of the battery cell. However, this method cannot accurately describe the entire expansion process of the battery cell, and the test data cannot accurately reflect the expansion force of the battery cell. Therefore, the module assembled based on this data still has significant safety hazards. Utility Model Content

[0005] This application aims to address at least one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, this application proposes a battery cell testing device.

[0007] In view of this, this application provides a battery cell testing device, comprising: a testing structure, the testing structure including: a clamping member, the clamping member including a first clamping plate, a second clamping plate and a third clamping plate, the second clamping plate being located between the first clamping plate and the third clamping plate, the first clamping plate and the second clamping plate enclosing a battery cell clamping area; a first sensor, the first sensor abutting between the second clamping plate and the third clamping plate; a connector, the connector being used to connect the first clamping plate, the second clamping plate and the third clamping plate, the second clamping plate being movable or deformable relative to the connector between the first clamping plate and the third clamping plate; when the battery cell in the battery cell clamping area expands, the first sensor generates data on the movement or deformation of the second clamping plate toward the third clamping plate.

[0008] This application provides a battery cell testing device including a testing structure for testing the expansion force of the battery cell.

[0009] The test structure includes a clamp, a first sensor, and a connector.

[0010] The clamping components include a first clamping plate, a second clamping plate, and a third clamping plate. The first and second clamping plates are used to clamp the battery cell, and the second and third clamping plates are used to clamp the first sensor.

[0011] Specifically, a cell clamping area is formed between the first clamping plate and the second clamping plate. When testing the expansion force of the cell, the cell is placed in the cell clamping area, that is, the cell is clamped between the first clamping plate and the second clamping plate.

[0012] Specifically, the first sensor is positioned between the second and third clamping plates.

[0013] The connector is used to connect the first clamping plate, the second clamping plate, and the third clamping plate; that is, the first clamping plate, the second clamping plate, and the third clamping plate are assembled together by the connector.

[0014] The second clamping plate is movably connected to the connector, and can move relative to the connector between the first and third clamping plates. That is, the position of the second clamping plate is not fixed, and it can move between the first and third clamping plates under the expansion force of the battery cell.

[0015] The second clamping plate is deformable relative to the connector between the first and third clamping plates. The second clamping plate can also deform between the first and third clamping plates under the expansion force of the battery cell.

[0016] When testing the expansion force of a battery cell, the cell is assembled onto the cell testing device. Specifically, the cell is placed in the cell clamping area, clamped between the first and second clamping plates. Connectors and clamping components cooperate to ensure an initial preload applied to the cell. The detection data from the first sensor is correlated with the initial preload; this data can be used to determine whether the preload applied to the cell has reached the initial preload, and it is also used to determine the cell's expansion force. Finally, the wiring harness is connected to the conductive portion of the cell for testing.

[0017] During testing, the expansion of the battery cell pushes the second clamping plate towards the third clamping plate. Because force transmission is mutual, the expansion force of the battery cell is effectively transmitted to the first sensor through the second clamping plate. The first sensor generates data on the movement of the second clamping plate towards the third clamping plate, and the expansion force of the battery cell can be determined through the detection data of the first sensor. In this way, when designing the module structure later, a structure that matches the expansion force of the battery cell can be effectively set, providing effective data support for ensuring the safety and reliability of the module operation and meeting the safety requirements of the module structure.

[0018] It is understandable that the second clamping plate is located between the first sensor and the battery cell; in other words, the first sensor and the battery cell are located on opposite sides of the second clamping plate. When the battery cell expands, the expansion force of the battery cell can drive the second clamping plate to move towards the third clamping plate, and the detection data of the first sensor changes accordingly. Therefore, the expansion force of the battery cell can be transmitted to the first sensor in a timely manner through the second clamping plate. This reduces the loss during the transmission of expansion force, ensuring that the expansion force of the battery cell is effectively transmitted to the first sensor. This results in a small and stable deviation between the measured expansion force of the battery cell and the actual value, thus guaranteeing the testing accuracy of the battery cell testing device.

[0019] Alternatively, during testing, the expansion of the battery cell will push the second clamping plate, causing it to deform. Because force transmission is mutual, the expansion force of the battery cell is equivalently transmitted to the first sensor through the second clamping plate. The first sensor generates data on the deformation of the second clamping plate towards the third clamping plate, and the expansion force of the battery cell can be determined through the detection data of the first sensor. In this way, when designing the module structure later, a structure that matches the expansion force of the battery cell can be effectively set, providing effective data support for ensuring the safety and reliability of the module operation and meeting the safety requirements of the module structure.

[0020] It is understandable that the second clamping plate is located between the first sensor and the battery cell; in other words, the first sensor and the battery cell are located on opposite sides of the second clamping plate. When the battery cell expands, the expansion force of the battery cell can drive the second clamping plate to deform towards the third clamping plate, and the detection data of the first sensor changes accordingly. Therefore, the expansion force of the battery cell can be transmitted to the first sensor in a timely manner through the second clamping plate. This reduces the loss during the transmission of expansion force, ensuring that the expansion force of the battery cell is effectively transmitted to the first sensor. This results in a small and stable deviation between the measured expansion force of the battery cell and the actual value, thus guaranteeing the testing accuracy of the battery cell testing device.

[0021] The cell testing apparatus described above according to this application may also have the following additional technical features:

[0022] In some technical solutions, the connector can optionally limit the distance between the first clamping plate and the third clamping plate.

[0023] In this technical solution, the mating structure of the connector and the clamping member is further defined.

[0024] The connector can limit the distance between the first and third clamping plates. That is, the connector and the clamping member cooperate to ensure that the distance between the first and third clamping plates is maintained after the battery cell is assembled with the battery cell testing device. In other words, even if the battery cell expands, the distance between the first and third clamping plates will not increase.

[0025] Specifically, taking the second clamping plate being movably connected to the connector, and the second clamping plate being able to move relative to the connector between the first and third clamping plates as an example, the distance between the first and third clamping plates is denoted as d, the distance between the first and second clamping plates (that is, the dimension of the cell clamping area in the direction from the first clamping plate to the second clamping plate) is denoted as d1, and the distance between the second and third clamping plates is denoted as d2, where d = d1 + d2. After the cell is assembled into the cell testing device, the value of d cannot be changed. When the cell expands, it will squeeze the second clamping plate towards the third clamping plate. At this time, the value of d1 increases, and the value of d2 decreases accordingly. The detection data of the first sensor changes accordingly. The detection data of the first sensor can at least be used to determine the expansion force of the cell. This setting allows the expansion force of the cell to be equivalently and entirely transmitted to the first sensor, making the detection of the first sensor more sensitive and helping to improve the testing accuracy of the cell testing device.

[0026] In some technical solutions, the clamping member may optionally include a fourth clamping plate, with the first clamping plate located between the second and fourth clamping plates. The first and second clamping plates are movable or deformable relative to the connector between the third and fourth clamping plates. The connector can limit the distance between the fourth and third clamping plates. The test structure also includes a second sensor, which abuts between the first and fourth clamping plates. When the battery cell in the cell clamping area expands, the second sensor generates data on the first clamping plate moving or deforming toward the fourth clamping plate.

[0027] In this technical solution, the structure of the cell testing device is further defined.

[0028] The test structure includes a clamp, a first sensor, a second sensor, and a connector.

[0029] The clamping components include a first clamping plate, a second clamping plate, a third clamping plate, and a fourth clamping plate. The second clamping plate is located between the first and third clamping plates, and the fourth clamping plate is located on the side of the first clamping plate opposite to the second clamping plate. A connector limits the distance between the fourth and third clamping plates.

[0030] The first and second clamping plates are movable relative to the connecting member between the third and fourth clamping plates. Specifically, the second clamping plate is movable relative to the connecting member between the first and third clamping plates, and the first clamping plate is movable relative to the connecting member between the fourth and second clamping plates. The positions of the first and second clamping plates are not fixed.

[0031] Alternatively, the first and second clamping plates can deform relative to the connecting member between the third and fourth clamping plates. The first sensor abuts between the second and third clamping plates, and the second sensor abuts between the first and fourth clamping plates.

[0032] When testing the expansion force of a battery cell, the cell is assembled onto the cell testing device. Specifically, the cell is placed in the cell clamping area, clamped between the first and second clamping plates. Connectors and clamping components cooperate to ensure the initial preload applied to the cell. The detection data from both the first and second sensors are correlated with the initial preload. The data from the first and / or second sensors can be used to determine whether the preload applied to the cell has reached the initial preload. Furthermore, the detection data from the first and second sensors are also used to determine the cell's expansion force. Finally, the wiring harness is connected to the conductive portion of the cell for testing. During testing, the expansion of the battery cell pushes the second clamping plate towards the third clamping plate and the first clamping plate towards the fourth clamping plate. Because force transmission is mutual, the expansion force of the battery cell is effectively transmitted to the first sensor through the second clamping plate, and also to the second sensor through the first clamping plate. Therefore, the expansion force of the battery cell can be determined by analyzing the detection data from both sensors. This allows for the effective design of the module structure to match the expansion force of the battery cell, providing effective data support for ensuring the safety and reliability of the module's operation.

[0033] It is understandable that the second clamping plate is located between the first sensor and the battery cell; that is, the first sensor and the battery cell are located on opposite sides of the second clamping plate. When the battery cell expands, the expansion force can drive the second clamping plate towards the third clamping plate, and the expansion force can also drive the first clamping plate towards the fourth clamping plate. The detection data from the first sensor changes accordingly, and the detection data from the second sensor changes accordingly. Therefore, the expansion force of the battery cell can be transmitted to the first sensor immediately through the second clamping plate, and also to the second sensor immediately through the first clamping plate. This reduces the loss during the transmission of expansion force, ensuring that the expansion force of the battery cell is effectively transmitted to both sensors. This results in a small and stable deviation between the measured expansion force of the battery cell and the actual value, guaranteeing the testing accuracy of the battery cell testing device.

[0034] Alternatively, during testing, the expansion of the battery cell will cause the second clamping plate to deform towards the third clamping plate, and the first clamping plate to deform towards the fourth clamping plate. Because the transmission of force is mutual, when the battery cell expands, the expansion force of the battery cell will be equivalently transmitted to the first sensor through the second clamping plate, and the expansion force of the battery cell will also be transmitted to the second sensor through the first clamping plate. Thus, the expansion force of the battery cell can be determined by the detection data of the first and second sensors. In this way, when designing the module structure later, a module structure that matches the expansion force of the battery cell can be effectively set, providing effective data support for ensuring the safety and reliability of the module operation.

[0035] It is understandable that the second clamping plate is located between the first sensor and the battery cell; that is, the first sensor and the battery cell are located on opposite sides of the second clamping plate. When the battery cell expands, the expansion force can drive the second clamping plate to deform towards the third clamping plate, and the expansion force can also drive the first clamping plate to deform towards the fourth clamping plate. The detection data from the first sensor changes accordingly, and the detection data from the second sensor changes accordingly. Therefore, the expansion force of the battery cell can be transmitted to the first sensor immediately through the second clamping plate, and also to the second sensor immediately through the first clamping plate. This reduces the loss during the transmission of expansion force, ensuring that the expansion force of the battery cell is effectively transmitted to both sensors. This results in a small and stable deviation between the measured expansion force of the battery cell and the actual value, guaranteeing the testing accuracy of the battery cell testing device. This design allows the expansion force of the battery cell to be effectively transmitted to both sensors, providing reliable structural support for ensuring the testing accuracy of the battery cell testing device.

[0036] Specifically, taking the first and second clamping plates as examples, both of which are movably connected to the connector, and the first and second clamping plates can move relative to the connector between the third and fourth clamping plates, the distance between the fourth and third clamping plates is denoted as d, the distance between the first and second clamping plates (that is, the dimension of the cell clamping area in the direction from the first to the second clamping plate) is denoted as d1, the distance between the second and third clamping plates is denoted as d2, and the distance between the first and fourth clamping plates is denoted as d3, where d = d1 + d2 + d3. After the battery cell is assembled into the battery cell testing device, the value of d cannot be changed. When the battery cell expands, it will squeeze the second clamping plate towards the third clamping plate and squeeze the first clamping plate towards the fourth clamping plate. At this time, the value of d1 increases, the value of d2 decreases accordingly, and the value of d3 decreases accordingly. The detection data of the first sensor changes accordingly, and the detection data of the second sensor changes accordingly. The detection data of the first and second sensors can at least be used to determine the expansion force of the battery cell. This setting allows the expansion force of the battery cell to be equivalently and completely transmitted to the first and second sensors, making the detection of the first and second sensors more sensitive and helping to improve the testing accuracy of the battery cell testing device.

[0037] In some technical solutions, optionally, the connector includes: a connecting portion extending through the clamping member along the direction from the first clamping plate to the second clamping plate, the second clamping plate being clearance-fitted with the connecting portion, and a first limiting portion provided at one end of the connecting portion; and a locking portion detachably connected to the connecting portion, wherein when the locking portion is assembled at the other end of the connecting portion away from the first limiting portion, the clamping member abuts between the first limiting portion and the locking portion; wherein, when the clamping member includes a fourth clamping plate, the first clamping plate is clearance-fitted with the connecting portion.

[0038] In this technical solution, the structure of the connector is defined. The connector includes a connecting part and a locking part.

[0039] When the clamping member does not include the fourth clamping plate, the connecting portion passes through the first, second, and third clamping plates along the direction from the first to the second clamping plate. The second clamping plate is clearance-fitted with the connecting portion, allowing the second clamping plate to move along the connecting portion. One end of the connecting portion has a first limiting portion, which abuts against one side of the clamping member along the direction from the first to the second clamping plate. The locking portion is detachably connected to the connecting portion. Specifically, when the locking portion is assembled at the end of the connecting portion away from the first limiting portion, the clamping member abuts between the first limiting portion and the locking portion. After the battery cell is placed in the battery cell clamping area, the locking portion is assembled onto the connecting portion, so that the clamping member abuts between the first limiting portion and the locking portion. This limits the distance between the first and third clamping plates, specifically limiting the maximum distance between the first and third clamping plates. When the battery cell expands, the distance between the first and third clamping plates will not increase accordingly. Meanwhile, the clamping component penetrates through the first clamping plate, the second clamping plate, and the third clamping plate, which can limit the running trajectory or deformation trajectory of the second clamping plate. This ensures the matching dimensions of the first clamping plate, the second clamping plate, and the third clamping plate, and prevents the second clamping plate from deviating from the preset trajectory. This provides reliable structural support for ensuring the testing accuracy of the battery cell testing device.

[0040] When the clamping member includes a fourth clamping plate, the connecting portion passes through the first, second, third, and fourth clamping plates along the direction from the first to the second clamping plate. The second clamping plate and the connecting portion are in clearance fit, and the first clamping plate and the connecting portion are also in clearance fit. The second clamping plate can move along the connecting portion, and the first clamping plate can move along the connecting portion. Alternatively, the first and second clamping plates can deform under the action of the battery cell. The connecting portion is provided with a first limiting portion, which abuts against one side of the clamping member along the direction from the first to the second clamping plate. The locking portion and the connecting portion are detachably connected. Specifically, when the locking portion is assembled at the other end of the connecting portion away from the first limiting portion, the clamping member abuts between the first limiting portion and the locking portion. After the battery cell is placed in the battery cell clamping area, the locking portion is assembled on the connecting portion, so that the clamping member abuts between the first limiting portion and the locking portion. In this way, the distance between the fourth and third clamping plates can be limited, specifically, the maximum distance between the fourth and third clamping plates can be limited. When the battery cell expands, the distance between the fourth and third clamping plates does not increase accordingly. Simultaneously, the clamping member penetrates through the first, second, third, and fourth clamping plates. The first and second clamping plates can move along the connecting portion, or they can deform, thereby limiting the running or deformation trajectory of the first and second clamping plates. This ensures the proper fit of the first, second, third, and fourth clamping plates, preventing deviations of the first and second clamping plates from their preset trajectories and providing reliable structural support for ensuring the testing accuracy of the battery cell testing device.

[0041] In some technical solutions, optionally, the outer peripheral wall of the connecting part is provided with an adjustment area, and the locking part can move along the length direction of the connecting part in the adjustment area and can lock into the adjustment area.

[0042] In this technical solution, the mating structure of the connecting part and the locking part is further defined.

[0043] The outer peripheral wall of the connecting part is provided with an adjustment area, and the locking part can move along the length direction of the connecting part in the adjustment area and can lock and engage with the adjustment area.

[0044] Different battery cell models have different external dimensions. When a battery cell is placed in the cell clamping area between the first and second clamping plates, the locking part is adjusted to fit the length of the connecting part and locked in a position that matches the dimensions of the battery cell. In other words, the initial preload of the battery cell is adjusted by locking the clamping parts to accommodate cells of different thicknesses, improving the compatibility of the battery cell testing device. This allows the device to meet the testing needs of various battery cell models, enhancing its versatility and improving its performance and adaptability.

[0045] In some technical solutions, optionally, the adjustment area is provided with external threads, and the locking part includes a nut, which is screwed to the external threads; or the adjustment area is provided with multiple locking positions, which are spaced apart along the length of the connecting part, and the locking part is provided with a buckle, which engages with the locking positions; or the adjustment area is provided with multiple connecting holes, which are spaced apart along the length of the connecting part, and the locking part and the connecting holes are locked together by fasteners.

[0046] In this technical solution, the mating structure of the connecting part and the locking part is further defined.

[0047] The adjustment area is provided with external threads, and the locking part includes a nut, which is screwed onto the external threads. The initial preload is adjusted by locking the clamping parts with the external threads and nut to accommodate cells of different thicknesses, improving the compatibility of the cell testing device and facilitating its operation. Specifically, first loosen the nut, place the cell to be tested between the first and second clamping plates, tighten the nut, and observe the detection data from the first sensor until the initial preload is reached. Then, electrically connect the wiring harness to the conductive part of the cell to begin testing.

[0048] The adjustment area has multiple locking positions, spaced apart along the length of the connecting part. The locking part has a latch that engages with the locking positions. Each cell thickness corresponds to one locking position. The cell testing device can meet the testing requirements of different cell models, improving compatibility and facilitating operation. Specifically, the cell to be tested is placed between the first and second clamping plates, and the latch of the locking part is engaged in the locking position corresponding to the cell model. Then, the wiring harness is electrically connected to the conductive part of the cell to begin testing.

[0049] The adjustment area has multiple connection holes, which are spaced apart along the length of the connection part. The locking part and the connection holes are locked together by fasteners. Each thickness of the battery cell corresponds to one connection hole. The battery cell testing device can meet the testing requirements of different models of battery cells, improve the compatibility of the battery cell testing device, and facilitate the operation of the battery cell testing device. Specifically, the battery cell to be tested is placed between the first clamping plate and the second clamping plate, and the connection hole and locking part that match the battery cell model are locked together by fasteners. Then, the wire harness is electrically connected to the conductive part of the battery cell to start the test.

[0050] In some technical solutions, optionally, there are multiple connecting parts and locking parts, with each connecting part cooperating with a locking part, and the multiple connecting parts are arranged at intervals.

[0051] In this technical solution, the number of connecting parts and locking parts, as well as the mating structure, are limited.

[0052] There are multiple connecting parts and multiple locking parts. Each connecting part mates with one locking part; in other words, multiple connecting parts mate with multiple locking parts one by one.

[0053] When the clamping components include a first clamping plate, a second clamping plate, and a third clamping plate, multiple connecting parts are arranged at intervals. This arrangement increases the mating area and mating angle between the connecting parts and the clamping components, effectively limiting the running trajectory of the second clamping plate and ensuring that the second clamping plate can be arranged in parallel between the first clamping plate and the third clamping plate, thus providing structural support for ensuring the testing accuracy of the cell testing device.

[0054] When the clamping components include a first clamping plate, a second clamping plate, a third clamping plate, and a fourth clamping plate, multiple connecting parts are arranged at intervals. This arrangement increases the mating area and mating angle between the connecting parts and the clamping components, effectively limiting the running trajectory or deformation trajectory of the first and second clamping plates. It ensures that the second clamping plate can be arranged parallel between the first and third clamping plates, and that the first clamping plate can be arranged parallel between the fourth and second clamping plates, providing structural support for ensuring the testing accuracy of the battery cell testing device.

[0055] In some technical solutions, optionally, along the direction from the first clamping plate to the third clamping plate, the center of the cell clamping area is set opposite to the center of the first sensor. When the clamping member also includes a second sensor, the center of the cell clamping area is set opposite to the center of the second sensor.

[0056] In this technical solution, when the clamping component does not include the fourth clamping plate, the center of the cell clamping area is set opposite to the center of the first sensor along the direction from the first clamping plate to the third clamping plate. This setting can ensure the matching size between the cell and the first sensor, so that when the cell expands, the expansion force of the cell can be correspondingly and effectively transmitted to the first sensor, which can improve the detection accuracy of the first sensor, reduce the error, and help improve the accuracy of the test data.

[0057] When the clamping component includes a fourth clamping plate, along the direction from the first clamping plate to the third clamping plate, the center of the cell clamping area is positioned opposite to the center of the first sensor, and the center of the cell clamping area is positioned opposite to the center of the second sensor. This arrangement can ensure the matching dimensions between the cell and the first and second sensors, so that when the cell expands, the expansion force of the cell can be correspondingly and effectively transmitted to the first and second sensors, which can improve the detection accuracy of the first and second sensors, reduce errors, and help improve the accuracy of test data.

[0058] In some technical solutions, optionally, when there are multiple test structures, the multiple test structures are arranged at intervals.

[0059] In this technical solution, the number of test structures is limited.

[0060] The device includes multiple test structures, each capable of testing the expansion force of one battery cell. This cell testing apparatus can simultaneously test the expansion force of multiple cells, improving its testing efficiency. In some technical solutions, the cell testing apparatus may optionally include a support structure, with the test structures mounted on a plate-like support structure, which supports the test structures; when there are multiple test structures, they are located on the same side of the support structure.

[0061] In this technical solution, the cell testing device also includes a support structure. The testing structure is mounted on the plate-like support structure, which serves to support and fix the testing structure. The support structure also elevates the testing structure, facilitating operator access.

[0062] When there are multiple test structures, they are located on the same side of the support structure. This arrangement not only meets the requirement of simultaneously testing the expansion force of multiple battery cells, but also helps to reduce the height of the battery cell testing device and simplifies the assembly of multiple battery cells.

[0063] In some technical solutions, optionally, when the connector restricts the distance between the first clamping plate and the third clamping plate, one of the first clamping plate and the third clamping plate is fixedly connected to the support structure, and the other of the first clamping plate and the second clamping plate are detachably connected to the support structure; the support structure is provided with a second limiting part; one of the first clamping plate and the third clamping plate is on the side away from the second clamping plate and abuts against the second limiting part.

[0064] In this technical solution, the clamping components include a first clamping plate, a second clamping plate, and a third clamping plate.

[0065] When the connector restricts the distance between the first and third clamping plates, and the first clamping plate is fixedly connected to the support structure, both the third and second clamping plates are detachably connected to the support structure. The second limiting part abuts against the side of the first clamping plate opposite to the second clamping plate. The second limiting part limits the first clamping plate along the direction from the first to the third clamping plate, and also supports the first clamping plate. The detachable connection of both the third and second clamping plates to the support structure simplifies the assembly and disassembly of the cell testing device, simplifies the assembly process between the cell and the testing device, reduces the difficulty of repairing and maintaining the cell testing device, and lowers the difficulty of assembling the cell.

[0066] When the connector restricts the distance between the first and third clamping plates, and the third clamping plate is fixedly connected to the support structure, both the first and second clamping plates are detachably connected to the support structure. The second limiting part abuts against the side of the third clamping plate opposite to the second clamping plate. The second limiting part limits the third clamping plate along the direction from the first clamping plate to the third clamping plate, and also supports the third clamping plate. The detachable connection of both the first and second clamping plates to the support structure simplifies the assembly and disassembly of the cell testing device, simplifies the assembly process between the cell and the testing device, reduces the difficulty of maintenance and repair of the cell testing device, and lowers the difficulty of cell assembly.

[0067] In some technical solutions, optionally, when the clamping member includes a fourth clamping plate, one of the third and fourth clamping plates is fixedly connected to the support structure, and the other of the third and fourth clamping plates, as well as the first and second clamping plates, are detachably connected to the support structure; the support structure is also provided with a second limiting part; one of the third and fourth clamping plates is located on the side opposite to the second clamping plate and abuts against the second limiting part.

[0068] In this technical solution, the clamping components include a first clamping plate, a second clamping plate, a third clamping plate, and a fourth clamping plate.

[0069] When the connector restricts the distance between the fourth and third clamping plates, and the third clamping plate is fixedly connected to the support structure, the fourth, first, and second clamping plates are all detachably connected to the support structure. The second limiting part abuts against the side of the third clamping plate opposite to the second clamping plate. The second limiting part limits the third clamping plate along the direction from the first to the third clamping plate, and also supports the third clamping plate. The detachable connection of the fourth, first, and second clamping plates to the support structure simplifies the assembly and disassembly of the cell testing device, simplifies the assembly process between the cell and the testing device, reduces the difficulty of maintenance and repair of the cell testing device, and lowers the difficulty of cell assembly.

[0070] When the connector restricts the distance between the fourth and third clamping plates, and the fourth clamping plate is fixedly connected to the support structure, the third, first, and second clamping plates are all detachably connected to the support structure. The second limiting part abuts against the side of the fourth clamping plate opposite to the second clamping plate. The second limiting part limits the fourth clamping plate along the direction from the first to the third clamping plate, and also supports the fourth clamping plate. The detachable connection of the third, first, and second clamping plates to the support structure simplifies the disassembly and assembly of the cell testing device, simplifies the assembly process of the cell and the cell testing device, reduces the difficulty of maintenance and repair of the cell testing device, and reduces the difficulty of cell assembly.

[0071] In some technical solutions, optionally, the support structure is provided with a bracket, which is located on the same side of the support structure as the test structure. The bracket is used to support the wire harness so that the wire harness can be separated from the test structure.

[0072] In this technical solution, the supporting structure is equipped with a bracket, and the bracket and the test structure are located on the same side of the supporting structure.

[0073] After the battery cell is assembled into the battery cell testing device, it needs to be electrically connected to the conductive part of the battery cell using a wire harness.

[0074] The bracket serves to support the wire harness, separating it from the test structure and preventing interference between the wire harness and the components of the cell testing device. It also meets the safety requirements for the cell testing device, providing structural support to ensure its safety and reliability.

[0075] In some technical solutions, optionally, when there are multiple test structures, the multiple test structures are arranged in a matrix, and the support includes: a first support plate; a second support plate; a column of test structures in the multiple columns of test structures, located between the first support plate and the second support plate; and a support plate, which is arranged at intervals with the support structures and is connected between the first support plate and the second support plate, and the support plate is used to support the wire harness.

[0076] In this technical solution, the bracket includes a first support plate, a second support plate, and a support plate.

[0077] Both the first and second support plates are connected to the supporting structure. The support plates are arranged at intervals with the supporting structure, and the support plates are connected between the first and second support plates. Therefore, the bracket is a trough-shaped structure, with the trough opening facing the supporting structure.

[0078] When there are multiple test structures, they are arranged in a matrix. That is, multiple test structures form a multi-row, multi-column structure.

[0079] One of the test structures in the test structure is located between the first support plate and the second support plate, and the wire harness is located on the support plate.

[0080] This setup not only meets the requirement of separating the wire harness from multiple test structures, but also reduces the material input of the bracket, which helps to reduce the production cost of the cell testing device and meets the requirement of simultaneously testing the expansion force of multiple cells.

[0081] In some technical solutions, the first sensor may optionally include a pressure sensor and / or a displacement sensor; when the cell testing device includes a second sensor, the second sensor may include a pressure sensor and / or a displacement sensor.

[0082] In this technical solution, when the cell testing device includes only the first sensor, the first sensor includes a pressure sensor and / or a displacement sensor.

[0083] When the first sensor includes a pressure sensor, the pressure data from the first sensor is used to determine at least the expansion force of the battery cell. Pressure sensors offer advantages such as high accuracy, fast response, strong stability, and good durability.

[0084] When the first sensor includes a displacement sensor, the position data from the first sensor is used to determine at least the expansion force of the battery cell. Displacement sensors offer advantages such as high accuracy, fast response, strong stability, and good durability.

[0085] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0086] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0087] Figure 1 This is a schematic diagram of the structure of a cell testing apparatus according to an embodiment of the present application from a first perspective;

[0088] Figure 2This is a schematic diagram of the structure of a cell testing apparatus according to an embodiment of this application from a second perspective;

[0089] Figure 3 This invention provides a third-view structural schematic diagram of a cell testing apparatus according to an embodiment of the present application.

[0090] Figure 4 A fourth-view structural schematic diagram of a cell testing apparatus according to an embodiment of this application is shown;

[0091] Figure 5 A schematic diagram of the test structure of one embodiment of this application is shown.

[0092] in, Figures 1 to 5 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0093] 1. Battery cell testing device; 10. Testing structure; 100. Clamping component; 110. First clamping plate; 120. Second clamping plate; 130. Third clamping plate; 140. Battery cell clamping area; 150. Fourth clamping plate; 200. First sensor; 300. Connector; 310. Connecting part; 312. First limiting part; 314. Adjustment area; 314a. External thread; 320. Locking part; 320a. Nut; 400. Second sensor; 50. Support structure; 500. Second limiting part; 600. Bracket; 610. First support plate; 620. Second support plate; 630. Support plate; 7. Battery cell; 700. Conductive part. Detailed Implementation

[0094] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0095] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0096] The following reference Figures 1 to 5 The present application describes a cell testing apparatus 1 according to some embodiments.

[0097] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a battery cell testing device 1 according to some embodiments of this application includes a testing structure 10 for testing the expansion force of a battery cell 7. The testing structure 10 includes a clamping member 100, a first sensor 200, and a connector 300.

[0098] The clamping member 100 includes a first clamping plate 110, a second clamping plate 120 and a third clamping plate 130.

[0099] The second clamping plate 120 is located between the first clamping plate 110 and the third clamping plate 130.

[0100] The first clamping plate 110 and the second clamping plate 120 enclose a cell clamping area 140.

[0101] The first sensor 200 abuts between the second clamping plate 120 and the third clamping plate 130.

[0102] The connector 300 is used to connect the first clamping plate 110, the second clamping plate 120 and the third clamping plate 130. The second clamping plate 120 can move or deform relative to the connector 300 between the first clamping plate 110 and the third clamping plate 130. When the battery cell 7 in the battery cell holding area 140 expands, the first sensor 200 generates data on the movement or deformation of the second clamping plate 120 toward the third clamping plate 130.

[0103] The battery cell testing device 1 provided in this application includes a testing structure 10, which is used to test the expansion force of the battery cell 7.

[0104] The test structure 10 includes a clamping member 100, a first sensor 200, and a connector 300.

[0105] The clamping member 100 includes a first clamping plate 110, a second clamping plate 120, and a third clamping plate 130. The first clamping plate 110 and the second clamping plate 120 are used to clamp the battery cell 7, and the second clamping plate 120 and the third clamping plate 130 are used to clamp the first sensor 200.

[0106] Specifically, a cell clamping area 140 is formed between the first clamping plate 110 and the second clamping plate 120. When testing the expansion force of the cell 7, the cell 7 is placed in the cell clamping area 140, that is, the cell 7 is clamped between the first clamping plate 110 and the second clamping plate 120.

[0107] Specifically, the first sensor 200 abuts between the second clamping plate 120 and the third clamping plate 130.

[0108] The connector 300 is used to connect the first clamping plate 110, the second clamping plate 120, and the third clamping plate 130; that is, the first clamping plate 110, the second clamping plate 120, and the third clamping plate 130 are assembled together via the connector 300. The second clamping plate 120 is movably connected to the connector 300 and can move relative to the connector 300 between the first clamping plate 110 and the third clamping plate 130. In other words, the position of the second clamping plate 120 is not fixed; it can move between the first clamping plate 110 and the third clamping plate 130 under the expansion force of the battery cell 7.

[0109] The second clamping plate 120 is deformable relative to the connector 300 between the first clamping plate 110 and the third clamping plate 130. The second clamping plate 120 is deformable between the first clamping plate 110 and the third clamping plate 130 under the expansion force of the battery cell 7.

[0110] When testing the expansion force of battery cell 7, battery cell 7 is assembled on battery cell testing device 1. Specifically, battery cell 7 is placed in battery cell clamping area 140, clamping it between first clamping plate 110 and second clamping plate 120. Connector 300 and clamping member 100 cooperate to ensure the initial preload applied to battery cell 7. The detection data of first sensor 200 is correlated with the initial preload, and the detection data of first sensor 200 can be used to determine whether the preload applied to battery cell 7 has reached the initial preload. The detection data of first sensor 200 is also used to determine the expansion force of battery cell 7. Then, the wiring harness is connected to the conductive part 700 of battery cell 7 to perform the test.

[0111] During testing, the expansion of cell 7 pushes the second clamping plate 120 towards the third clamping plate 130. Since force transmission is mutual, the expansion force of cell 7 is effectively transmitted to the first sensor 200 through the second clamping plate 120. The first sensor 200 generates data on the movement of the second clamping plate 120 towards the third clamping plate 130, and the expansion force of cell 7 can be determined from this data. This allows for the effective design of a module structure that matches the expansion force of cell 7, providing effective data support for ensuring the safety and reliability of the module operation and meeting the safety regulations for module structures.

[0112] It is understood that the second clamping plate 120 is located between the first sensor 200 and the battery cell 7; that is, the first sensor 200 and the battery cell 7 are located on opposite sides of the second clamping plate 120. When the battery cell 7 expands, the expansion force of the battery cell 7 can drive the second clamping plate 120 to move towards the third clamping plate 130, and the detection data of the first sensor 200 changes accordingly. Therefore, the expansion force of the battery cell 7 can be transmitted to the first sensor 200 in a timely manner through the second clamping plate 120. This reduces the loss during the transmission of expansion force, ensuring that the expansion force of the battery cell 7 is effectively transmitted to the first sensor 200. This results in a small and stable deviation between the measured expansion force of the battery cell 7 and the actual value, thus guaranteeing the testing accuracy of the battery cell testing device 1.

[0113] Alternatively, during testing, the expansion of cell 7 will push the second clamping plate 120, causing it to deform. Since force transmission is mutual, the expansion force of cell 7 is effectively transmitted to the first sensor 200 through the second clamping plate 120. The first sensor 200 generates data on the deformation of the second clamping plate 120 towards the third clamping plate 130, and the expansion force of cell 7 can be determined from this data. This allows for effective design of the module structure to match the expansion force of cell 7, providing effective data support for ensuring the safety and reliability of the module operation and meeting safety regulations. It can be understood that the second clamping plate 120 is located between the first sensor 200 and cell 7; or, in other words, the first sensor 200 and cell 7 are located on opposite sides of the second clamping plate 120. When cell 7 expands, its expansion force drives the second clamping plate 120 to deform towards the third clamping plate 130, and the detection data from the first sensor 200 changes accordingly. Therefore, the expansion force of the battery cell 7 can be transmitted to the first sensor 200 in a timely manner through the second clamping plate 120. This reduces the loss during the transmission of expansion force, so that the expansion force of the battery cell 7 is effectively transmitted to the first sensor 200. This results in a small and stable deviation between the measured expansion force of the battery cell 7 and the actual value, ensuring the testing accuracy of the battery cell testing device 1.

[0114] This embodiment provides a battery cell testing device 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: the connector 300 can limit the distance between the first clamping plate 110 and the third clamping plate 130.

[0115] In this embodiment, the mating structure of the connector 300 and the clamping member 100 is further defined.

[0116] The connector 300 can limit the distance between the first clamping plate 110 and the third clamping plate 130. That is, the connector 300 cooperates with the clamping member 100 to ensure that the distance between the first clamping plate 110 and the third clamping plate 130 is maintained after the battery cell 7 is assembled with the battery cell testing device 1. In other words, even if the battery cell 7 expands, the distance between the first clamping plate 110 and the third clamping plate 130 will not increase.

[0117] Specifically, taking the second clamping plate 120 being movably connected to the connector 300, and the second clamping plate 120 being able to move relative to the connector 300 between the first clamping plate 110 and the third clamping plate 130 as an example, the distance between the first clamping plate 110 and the third clamping plate 130 is denoted as d, the distance between the first clamping plate 110 and the second clamping plate 120 (that is, the dimension of the cell clamping area 140 in the direction from the first clamping plate 110 to the second clamping plate 120) is denoted as d1, and the distance between the second clamping plate 120 and the third clamping plate 130 is denoted as d2, where d = d1 + d2. After the battery cell 7 is assembled into the battery cell testing device 1, the value of d cannot be changed. When the battery cell 7 expands, it will squeeze the second clamping plate 120 and move towards the third clamping plate 130. At this time, the value of d1 increases and the value of d2 decreases accordingly. The detection data of the first sensor 200 changes accordingly. The detection data of the first sensor 200 can at least be used to determine the expansion force of the battery cell 7. This setting makes the expansion force of the battery cell 7 equivalently transmitted to the first sensor 200, making the detection of the first sensor 200 more sensitive and helping to improve the testing accuracy of the battery cell testing device 1.

[0118] This embodiment provides a battery cell testing device 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features, such as... Figure 5 As shown, the clamping member 100 also includes a fourth clamping plate 150.

[0119] The first clamping plate 110 is located between the second clamping plate 120 and the fourth clamping plate 150. The first clamping plate 110 and the second clamping plate 120 can move or deform relative to the connector 300 between the third clamping plate 130 and the fourth clamping plate 150. The connector 300 can limit the distance between the fourth clamping plate 150 and the third clamping plate 130. The test structure 10 also includes a second sensor 400, which abuts between the first clamping plate 110 and the fourth clamping plate 150. When the battery cell 7 in the battery cell holding area 140 expands, the second sensor 400 generates data on the movement or deformation of the first clamping plate 110 toward the fourth clamping plate 150.

[0120] In this embodiment, the structure of the cell testing device 1 is further defined.

[0121] The test structure 10 includes a clamping member 100, a first sensor 200, a second sensor 400, and a connector 300.

[0122] The clamping member 100 includes a first clamping plate 110, a second clamping plate 120, a third clamping plate 130, and a fourth clamping plate 150. The second clamping plate 120 is located between the first clamping plate 110 and the third clamping plate 130, and the fourth clamping plate 150 is located on the side of the first clamping plate 110 opposite to the second clamping plate 120. The connecting member 300 can limit the distance between the fourth clamping plate 150 and the third clamping plate 130.

[0123] The first clamping plate 110 and the second clamping plate 120 are movable relative to the connecting member 300 between the third clamping plate 130 and the fourth clamping plate 150. Specifically, the second clamping plate 120 is movable relative to the connecting member 300 between the first clamping plate 110 and the third clamping plate 130, and the first clamping plate 110 is movable relative to the connecting member 300 between the fourth clamping plate 150 and the second clamping plate 120. The positions of the first clamping plate 110 and the second clamping plate 120 are not fixed.

[0124] Alternatively, the first clamping plate 110 and the second clamping plate 120 can deform relative to the connector 300 between the third clamping plate 130 and the fourth clamping plate 150.

[0125] The first sensor 200 abuts between the second clamping plate 120 and the third clamping plate 130, and the second sensor 400 abuts between the first clamping plate 110 and the fourth clamping plate 150.

[0126] When testing the expansion force of the battery cell 7, the battery cell 7 is assembled on the battery cell testing device 1. Specifically, the battery cell 7 is placed in the battery cell clamping area 140, so that the battery cell 7 is clamped between the first clamping plate 110 and the second clamping plate 120. The connector 300 and the clamping member 100 cooperate to ensure the initial preload applied to the battery cell 7. The detection data of the first sensor 200 and the second sensor 400 are both correlated with the initial preload. The detection data of the first sensor 200 and / or the second sensor 400 can be used to determine whether the preload applied to the battery cell 7 has reached the initial preload. Furthermore, the detection data of the first sensor 200 and the second sensor 400 are also used to determine the expansion force of the battery cell 7. Then, the wiring harness is connected to the conductive part 700 of the battery cell 7 to perform the test.

[0127] During testing, the expansion of cell 7 pushes the second clamping plate 120 towards the third clamping plate 130 and the first clamping plate 110 towards the fourth clamping plate 150. Because force transmission is mutual, the expansion force of cell 7 is effectively transmitted to the first sensor 200 via the second clamping plate 120, and also to the second sensor 400 via the first clamping plate 110. Therefore, the expansion force of cell 7 can be determined by the detection data from the first sensor 200 and the second sensor 400. This allows for the effective design of a module structure that matches the expansion force of cell 7 during subsequent module design, providing effective data support for ensuring the safety and reliability of module operation.

[0128] It is understood that the second clamping plate 120 is located between the first sensor 200 and the battery cell 7; that is, the first sensor 200 and the battery cell 7 are located on opposite sides of the second clamping plate 120. Similarly, the first clamping plate 110 is located between the second sensor 400 and the battery cell 7; that is, the second sensor 400 and the battery cell 7 are located on opposite sides of the first clamping plate 110. When the battery cell 7 expands, the expansion force of the battery cell 7 can drive the second clamping plate 120 to move towards the third clamping plate 130, and the expansion force of the battery cell 7 can also drive the first clamping plate 110 to move towards the fourth clamping plate 150. The detection data of the first sensor 200 changes accordingly, and the detection data of the second sensor 400 changes accordingly. Therefore, the expansion force of the battery cell 7 can be transmitted to the first sensor 200 in a timely manner through the second clamping plate 120, and the expansion force of the battery cell 7 can also be transmitted to the second sensor 400 in a timely manner through the first clamping plate 110. In this way, the loss during the transmission of expansion force can be reduced, so that the expansion force of the battery cell 7 will be transmitted to the first sensor 200 and the second sensor 400 equally. This makes the deviation between the measured expansion force of the battery cell 7 and the actual value small and stable, and can ensure the testing accuracy of the battery cell testing device 1.

[0129] Alternatively, during testing, the expansion of cell 7 will push the second clamping plate 120 to deform towards the third clamping plate 130, and the first clamping plate 110 to deform towards the fourth clamping plate 150. Because the transmission of force is mutual, when cell 7 expands, the expansion force of cell 7 will be effectively transmitted to the first sensor 200 through the second clamping plate 120, and the expansion force of cell 7 will also be transmitted to the second sensor 400 through the first clamping plate 110. Therefore, the expansion force of cell 7 can be determined by the detection data from the first sensor 200 and the second sensor 400. In this way, when designing the module structure subsequently, a module structure that matches the expansion force of cell 7 can be effectively set, providing effective data support for ensuring the safety and reliability of module operation.

[0130] It is understood that the second clamping plate 120 is located between the first sensor 200 and the battery cell 7; that is, the first sensor 200 and the battery cell 7 are located on opposite sides of the second clamping plate 120. Similarly, the first clamping plate 110 is located between the second sensor 400 and the battery cell 7; that is, the second sensor 400 and the battery cell 7 are located on opposite sides of the first clamping plate 110. When the battery cell 7 expands, the expansion force of the battery cell 7 can drive the second clamping plate 120 to deform towards the third clamping plate 130, and the expansion force of the battery cell 7 can also drive the first clamping plate 110 to deform towards the fourth clamping plate 150. Consequently, the detection data of the first sensor 200 changes, and the detection data of the second sensor 400 changes accordingly. Therefore, the expansion force of the battery cell 7 can be transmitted to the first sensor 200 in a timely manner through the second clamping plate 120, and the expansion force of the battery cell 7 can also be transmitted to the second sensor 400 in a timely manner through the first clamping plate 110. In this way, the loss during the transmission of expansion force can be reduced, so that the expansion force of the battery cell 7 will be transmitted to the first sensor 200 and the second sensor 400 equally. This makes the deviation between the measured expansion force of the battery cell 7 and the actual value small and stable, and can ensure the testing accuracy of the battery cell testing device 1.

[0131] This configuration allows the expansion force of the battery cell 7 to be effectively transmitted to the first sensor 200 and the second sensor 400, providing reliable structural support for ensuring the testing accuracy of the battery cell testing device 1.

[0132] Specifically, taking the first clamping plate 110 and the second clamping plate 120 as examples, both of which are movably connected to the connector 300, and the first clamping plate 110 and the second clamping plate 120 being able to move relative to the connector 300 between the third clamping plate 130 and the fourth clamping plate 150, the distance between the fourth clamping plate 150 and the third clamping plate 130 is denoted as d, the distance between the first clamping plate 110 and the second clamping plate 120 (that is, the dimension of the cell clamping area 140 in the direction from the first clamping plate 110 to the second clamping plate 120) is denoted as d1, the distance between the second clamping plate 120 and the third clamping plate 130 is denoted as d2, and the distance between the first clamping plate 110 and the fourth clamping plate 150 is denoted as d3, where d = d1 + d2 + d3. After the battery cell 7 is assembled into the battery cell testing device 1, the value of d cannot be changed. When the battery cell 7 expands, it will squeeze the second clamping plate 120 to move towards the third clamping plate 130, and squeeze the first clamping plate 110 to move towards the fourth clamping plate 150. At this time, the value of d1 increases, the value of d2 decreases accordingly, and the value of d3 decreases accordingly. The detection data of the first sensor 200 changes accordingly, and the detection data of the second sensor 400 changes accordingly. The detection data of the first sensor 200 and the second sensor 400 can at least be used to determine the expansion force of the battery cell 7. This setting allows the expansion force of the battery cell 7 to be equivalently and completely transmitted to the first sensor 200 and the second sensor 400, making the detection of the first sensor 200 and the second sensor 400 more sensitive, which is beneficial to improving the testing accuracy of the battery cell testing device 1.

[0133] This embodiment provides a battery cell testing device 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features, such as... Figure 2 As shown, the connector 300 includes a connecting part 310 and a locking part 320.

[0134] Along the direction from the first clamping plate 110 to the second clamping plate 120, the connecting part 310 passes through the clamping member 100.

[0135] The second clamping plate 120 is clearance-fitted with the connecting part 310.

[0136] When the clamping member 100 includes the fourth clamping plate 150, the first clamping plate 110 and the connecting part 310 are in clearance fit.

[0137] One end of the connecting part 310 is provided with a first limiting part 312.

[0138] The locking part 320 and the connecting part 310 are detachably connected.

[0139] When the locking part 320 is assembled at the other end of the connecting part 310 away from the first limiting part 312, the clamping member 100 abuts between the first limiting part 312 and the locking part 320.

[0140] In this embodiment, the structure of the connector 300 is defined. The connector 300 includes a connecting portion 310 and a locking portion 320.

[0141] When the clamping member 100 does not include the fourth clamping plate 150, the connecting portion 310 passes through the first clamping plate 110, the second clamping plate 120, and the third clamping plate 130 along the direction from the first clamping plate 110 to the second clamping plate 120. The second clamping plate 120 is clearance-fitted with the connecting portion 310, and the second clamping plate 120 can move along the connecting portion 310. One end of the connecting portion 310 is provided with a first limiting portion 312, which abuts against one side of the clamping member 100 along the direction from the first clamping plate 110 to the second clamping plate 120. The locking portion 320 is detachably connected to the connecting portion 310. Specifically, when the locking portion 320 is assembled at the other end of the connecting portion 310 away from the first limiting portion 312, the clamping member 100 abuts between the first limiting portion 312 and the locking portion 320. After placing the battery cell 7 in the battery cell clamping area 140, the locking part 320 is assembled onto the connecting part 310, so that the clamping member 100 abuts between the first limiting part 312 and the locking part 320. This limits the distance between the first clamping plate 110 and the third clamping plate 130, specifically, it limits the maximum distance between the first clamping plate 110 and the third clamping plate 130. When the battery cell 7 expands, the distance between the first clamping plate 110 and the third clamping plate 130 will not increase accordingly. At the same time, the clamping member 100 passes through the first clamping plate 110, the second clamping plate 120 and the third clamping plate 130, which can limit the running trajectory or deformation trajectory of the second clamping plate 120. This ensures the matching dimensions of the first clamping plate 110, the second clamping plate 120 and the third clamping plate 130, and prevents the second clamping plate 120 from deviating from the preset trajectory. This provides reliable structural support for ensuring the testing accuracy of the battery cell testing device 1.

[0142] When the clamping member 100 includes a fourth clamping plate 150, the connecting portion 310 passes through the first clamping plate 110, the second clamping plate 120, the third clamping plate 130, and the fourth clamping plate 150 along the direction from the first clamping plate 110 to the second clamping plate 120. The second clamping plate 120 and the connecting portion 310 are in clearance fit, and the first clamping plate 110 and the connecting portion 310 are also in clearance fit. The second clamping plate 120 can move along the connecting portion 310, and the first clamping plate 110 can move along the connecting portion 310. Alternatively, the first clamping plate 110 and the second clamping plate 120 can be deformed under the action of the battery cell 7. The connecting portion 310 is provided with a first limiting portion 312, which abuts against one side of the clamping member 100 along the direction from the first clamping plate 110 to the second clamping plate 120. The locking part 320 and the connecting part 310 are detachably connected. Specifically, when the locking part 320 is assembled at the other end of the connecting part 310 away from the first limiting part 312, the clamping member 100 abuts between the first limiting part 312 and the locking part 320. After the battery cell 7 is placed in the battery cell clamping area 140, the locking part 320 is assembled onto the connecting part 310, so that the clamping member 100 abuts between the first limiting part 312 and the locking part 320. In this way, the distance between the fourth clamping plate 150 and the third clamping plate 130 can be limited, specifically, the maximum distance between the fourth clamping plate 150 and the third clamping plate 130 is limited. When the battery cell 7 expands, the distance between the fourth clamping plate 150 and the third clamping plate 130 will not increase accordingly. Meanwhile, the clamping member 100 passes through the first clamping plate 110, the second clamping plate 120, the third clamping plate 130, and the fourth clamping plate 150. The first clamping plate 110 and the second clamping plate 120 can move along the connecting part 310, or the first clamping plate 110 and the second clamping plate 120 can deform, thereby limiting the running trajectory or deformation trajectory of the first clamping plate 110 and the second clamping plate 120. This ensures the matching dimensions of the first clamping plate 110, the second clamping plate 120, the third clamping plate 130, and the fourth clamping plate 150, and prevents the first clamping plate 110 and the second clamping plate 120 from deviating from the preset trajectory, thus providing reliable structural support for ensuring the testing accuracy of the cell testing device 1.

[0143] This embodiment provides a battery cell testing device 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features, such as... Figure 2 As shown, the outer peripheral wall of the connecting part 310 is provided with an adjustment area 314.

[0144] The locking part 320 can move along the length direction of the connecting part 310 at the adjustment area 314 and can lock into the adjustment area 314.

[0145] In this embodiment, the mating structure of the connecting portion 310 and the locking portion 320 is further defined.

[0146] The outer peripheral wall of the connecting part 310 is provided with an adjustment area 314, and the locking part 320 can move along the length direction of the connecting part 310 at the adjustment area 314 and can lock and engage with the adjustment area 314.

[0147] Different models of battery cell 7 result in different external dimensions. When battery cell 7 is placed in the battery cell clamping area 140 between the first clamping plate 110 and the second clamping plate 120, the locking part 320 is adaptively adjusted along the length direction of the connecting part 310 and locked in a position that matches the dimensions of battery cell 7. That is, the initial preload of battery cell 7 is adjusted by locking the clamping member 100 with the locking part 320 to accommodate battery cells 7 of different thicknesses, improve the compatibility of battery cell testing device 1, enable battery cell testing device 1 to meet the testing requirements of various models of battery cell 7, improve the versatility of battery cell testing device 1, and enhance the performance and adaptability of battery cell testing device 1.

[0148] This embodiment provides a battery cell testing device 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features, such as... Figure 2 As shown, the adjustment area 314 is provided with an external thread 314a, and the locking part 320 includes a nut 320a, which is screwed into the external thread 314a.

[0149] Alternatively, the adjustment area 314 may have multiple locking positions, which are spaced apart along the length of the connecting part 310. The locking part 320 may have a buckle that engages with the locking position.

[0150] Alternatively, the adjustment area 314 may be provided with multiple connecting holes, which are spaced apart along the length of the connecting part 310, and the locking part 320 and the connecting holes are locked together by fasteners.

[0151] In this embodiment, the mating structure of the connecting portion 310 and the locking portion 320 is further defined.

[0152] The adjustment area 314 is provided with an external thread 314a, and the locking part 320 includes a nut 320a, which is screwed onto the external thread 314a. The initial preload is adjusted by locking the clamping member 100 through the external thread 314a and the nut 320a to accommodate battery cells 7 of different thicknesses, improving the compatibility of the battery cell testing device 1 and facilitating its operation. Specifically, first loosen the nut 320a, place the battery cell 7 to be tested between the first clamping plate 110 and the second clamping plate 120, and then tighten the nut 320a. While tightening, observe the detection data of the first sensor 200 until the initial preload is reached. Afterwards, electrically connect the wiring harness to the conductive part 700 of the battery cell 7 to begin testing.

[0153] The adjustment area 314 has multiple locking positions, which are spaced apart along the length of the connecting part 310. The locking part 320 has a buckle that engages with the locking positions. Each thickness of the battery cell 7 corresponds to one locking position. The battery cell testing device 1 can meet the testing requirements of different models of battery cells 7, improving the compatibility of the battery cell testing device 1 and facilitating its operation. Specifically, the battery cell 7 to be tested is placed between the first clamping plate 110 and the second clamping plate 120, and the buckle of the locking part 320 is engaged in the locking position that matches the model of the battery cell 7. Then, the wire harness is electrically connected to the conductive part 700 of the battery cell 7 to begin testing.

[0154] The adjustment area 314 is provided with multiple connection holes, which are spaced apart along the length of the connecting part 310. The locking part 320 and the connection holes are locked together by fasteners. Each thickness of the battery cell 7 corresponds to one connection hole. The battery cell testing device 1 can meet the testing requirements of different models of battery cells 7, improve the compatibility of the battery cell testing device 1, and facilitate the operation of the battery cell testing device 1. Specifically, the battery cell 7 to be tested is placed between the first clamping plate 110 and the second clamping plate 120, and the connection hole and locking part 320 that are compatible with the model of the battery cell 7 are locked together by fasteners. Then, the wire harness is electrically connected to the conductive part 700 of the battery cell 7 to start the test.

[0155] This embodiment provides a battery cell testing device 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: the number of connecting parts 310 and locking parts 320 are both multiple.

[0156] Each connecting part 310 cooperates with a locking part 320, and multiple connecting parts 310 are arranged at intervals.

[0157] In this embodiment, the number of connecting portions 310 and locking portions 320 and their mating structure are defined.

[0158] There are multiple connecting parts 310 and multiple locking parts 320. Each connecting part 310 cooperates with one locking part 320, or in other words, multiple connecting parts 310 and multiple locking parts 320 cooperate one-to-one.

[0159] When the clamping member 100 includes a first clamping plate 110, a second clamping plate 120, and a third clamping plate 130, multiple connecting parts 310 are arranged at intervals. This arrangement increases the mating area and mating angle between the connecting member 300 and the clamping member 100, which can effectively limit the running trajectory of the second clamping plate 120 and ensure that the second clamping plate 120 can be arranged in parallel between the first clamping plate 110 and the third clamping plate 130, thus providing structural support for ensuring the testing accuracy of the cell testing device 1.

[0160] When the clamping member 100 includes a first clamping plate 110, a second clamping plate 120, a third clamping plate 130, and a fourth clamping plate 150, multiple connecting parts 310 are arranged at intervals. This arrangement increases the mating area and mating angle between the connecting member 300 and the clamping member 100, which can effectively limit the running trajectory or deformation trajectory of the first clamping plate 110 and the second clamping plate 120, ensuring that the second clamping plate 120 can be arranged in parallel between the first clamping plate 110 and the third clamping plate 130, and ensuring that the first clamping plate 110 can be arranged in parallel between the fourth clamping plate 150 and the second clamping plate 120, thus providing structural support for ensuring the testing accuracy of the cell testing device 1.

[0161] For example, the number of connecting parts 310 matches the number of corners of the third clamping plate 130, with each corner engaging with one connecting part 310. This ensures the balance of forces on the second clamping plate 120 and the first clamping plate 110, allowing them to move smoothly and preventing jamming due to tilting.

[0162] This embodiment provides a battery cell testing device 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: along the direction from the first clamping plate 110 to the third clamping plate 130, the center of the battery cell clamping area 140 is arranged opposite to the center of the first sensor 200.

[0163] When the clamping member 100 also includes a second sensor 400, the center of the cell clamping area 140 is positioned opposite to the center of the second sensor 400.

[0164] In this embodiment, when the clamping member 100 does not include the fourth clamping plate 150, the center of the cell clamping area 140 is positioned opposite to the center of the first sensor 200 along the direction from the first clamping plate 110 to the third clamping plate 130. This arrangement can ensure the matching dimensions between the cell 7 and the first sensor 200, so that when the cell 7 expands, the expansion force of the cell 7 can be correspondingly and effectively transmitted to the first sensor 200, which can improve the detection accuracy of the first sensor 200, reduce the error, and help improve the accuracy of the test data.

[0165] When the clamping member 100 includes the fourth clamping plate 150, along the direction from the first clamping plate 110 to the third clamping plate 130, the center of the cell clamping area 140 is positioned opposite to the center of the first sensor 200, and the center of the cell clamping area 140 is positioned opposite to the center of the second sensor 400. This arrangement can ensure the matching dimensions between the cell 7 and the first sensor 200 and the second sensor 400, so that when the cell 7 expands, the expansion force of the cell 7 can be correspondingly and effectively transmitted to the first sensor 200 and the second sensor 400, which can improve the detection accuracy of the first sensor 200 and the second sensor 400, with small errors, which is conducive to improving the accuracy of test data.

[0166] This embodiment provides a cell testing device 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: when there are multiple test structures 10, the multiple test structures 10 are arranged at intervals.

[0167] In this embodiment, the number of test structures 10 is limited.

[0168] There are multiple test structures 10, and each test structure 10 can test the expansion force of one battery cell 7. The battery cell testing device 1 can meet the requirements of simultaneously testing the expansion force of multiple battery cells 7, which helps to improve the testing efficiency of the battery cell testing device 1.

[0169] In some other embodiments, the number of test structures 10 is one.

[0170] This embodiment provides a battery cell testing device 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features, such as... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the cell testing device 1 also includes a support structure 50.

[0171] The test structure 10 is mounted on the plate-shaped support structure 50.

[0172] Support structure 50 is used to support test structure 10.

[0173] When there are multiple test structures 10, the multiple test structures 10 are located on the same side of the support structure 50.

[0174] In this embodiment, the cell testing device 1 further includes a support structure 50. The testing structure 10 is disposed on the plate-shaped support structure 50, which supports and fixes the testing structure 10. The support structure 50 also raises the position of the testing structure 10, facilitating operation by the operator.

[0175] When there are multiple test structures 10, the multiple test structures 10 are located on the same side of the support structure 50. This arrangement not only meets the requirements for simultaneously testing the expansion force of multiple battery cells 7, but also helps to reduce the height of the battery cell testing device 1, and simplifies the assembly difficulty of multiple battery cells 7.

[0176] For example, the support structure 50 includes a support plate 630.

[0177] For example, the support structure 50 includes a bracket 600.

[0178] For example, the height of the support structure 50 is adjustable. The height of the support structure 50 can be adjusted according to the specific site conditions, thereby adjusting the position and height of the test structure 10, making it easier for the operator to operate the cell testing device 1.

[0179] This embodiment provides a battery cell testing device 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: when the connector 300 restricts the distance between the first clamping plate 110 and the third clamping plate 130, one of the first clamping plate 110 and the third clamping plate 130 is fixedly connected to the support structure 50, and the other of the first clamping plate 110 and the third clamping plate 130 and the second clamping plate 120 are detachably connected to the support structure 50.

[0180] like Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, the support structure 50 is provided with a second limiting part 500.

[0181] The second limiting part 500 abuts against the side of one of the first clamping plate 110 and the third clamping plate 130 away from the second clamping plate 120.

[0182] In this embodiment, the clamping member 100 includes a first clamping plate 110, a second clamping plate 120, and a third clamping plate 130.

[0183] When the connector 300 restricts the distance between the first clamping plate 110 and the third clamping plate 130, and the first clamping plate 110 is fixedly connected to the support structure 50, the third clamping plate 130 and the second clamping plate 120 are both detachably connected to the support structure 50. The second limiting part 500 abuts against the side of the first clamping plate 110 opposite to the second clamping plate 120. The second limiting part 500 limits the first clamping plate 110 in the direction from the first clamping plate 110 to the third clamping plate 130, and at the same time, the second limiting part 500 can also support the first clamping plate 110. The third clamping plate 130 and the second clamping plate 120 are both detachably connected to the support structure 50. This arrangement simplifies the disassembly and assembly of the cell testing device 1, simplifies the assembly process of the cell 7 and the cell testing device 1, and helps to reduce the difficulty of maintenance and repair of the cell testing device 1, as well as the difficulty of assembling the cell 7.

[0184] When the connector 300 restricts the distance between the first clamping plate 110 and the third clamping plate 130, and the third clamping plate 130 is fixedly connected to the support structure 50, both the first clamping plate 110 and the second clamping plate 120 are detachably connected to the support structure 50. The second limiting part 500 abuts against the side of the third clamping plate 130 opposite to the second clamping plate 120. The second limiting part 500 limits the third clamping plate 130 in the direction from the first clamping plate 110 to the third clamping plate 130, and at the same time, the second limiting part 500 can also support the third clamping plate 130. The detachable connection between the first clamping plate 110 and the second clamping plate 120 and the support structure 50 simplifies the disassembly and assembly of the cell testing device 1, simplifies the assembly process of the cell 7 and the cell testing device 1, and helps to reduce the difficulty of maintenance and repair of the cell testing device 1 and the difficulty of assembling the cell 7.

[0185] This embodiment provides a battery cell testing device 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: when the clamping member 100 includes a fourth clamping plate 150, one of the third clamping plate 130 and the fourth clamping plate 150 is fixedly connected to the support structure 50, and the other of the third clamping plate 130 and the fourth clamping plate 150, the first clamping plate 110 and the second clamping plate 120 are detachably connected to the support structure 50.

[0186] The support structure 50 is also provided with a second limiting part 500, which abuts against one of the third clamping plate 130 and the fourth clamping plate 150 on the side away from the second clamping plate 120.

[0187] In this embodiment, the clamping member 100 includes a first clamping plate 110, a second clamping plate 120, a third clamping plate 130, and a fourth clamping plate 150.

[0188] When the connector 300 restricts the distance between the fourth clamping plate 150 and the third clamping plate 130, and the third clamping plate 130 is fixedly connected to the support structure 50, the fourth clamping plate 150, the first clamping plate 110, and the second clamping plate 120 are all detachably connected to the support structure 50. The second limiting part 500 abuts against the side of the third clamping plate 130 opposite to the second clamping plate 120. The second limiting part 500 limits the third clamping plate 130 in the direction from the first clamping plate 110 to the third clamping plate 130, and at the same time, the second limiting part 500 can also support the third clamping plate 130. The fourth clamping plate 150, the first clamping plate 110, and the second clamping plate 120 are all detachably connected to the support structure 50. This arrangement simplifies the disassembly and assembly of the cell testing device 1, simplifies the assembly process of the cell 7 and the cell testing device 1, and helps to reduce the difficulty of maintenance and repair of the cell testing device 1 and the difficulty of assembling the cell 7.

[0189] When the connector 300 restricts the distance between the fourth clamping plate 150 and the third clamping plate 130, and the fourth clamping plate 150 is fixedly connected to the support structure 50, the third clamping plate 130, the first clamping plate 110, and the second clamping plate 120 are all detachably connected to the support structure 50. The second limiting part 500 abuts against the side of the fourth clamping plate 150 opposite to the second clamping plate 120. The second limiting part 500 limits the fourth clamping plate 150 in the direction from the first clamping plate 110 to the third clamping plate 130, and at the same time, the second limiting part 500 can also support the fourth clamping plate 150. The third clamping plate 130, the first clamping plate 110, and the second clamping plate 120 are all detachably connected to the support structure 50. This arrangement simplifies the disassembly and assembly of the cell testing device 1, simplifies the assembly process of the cell 7 and the cell testing device 1, and helps to reduce the difficulty of maintenance and repair of the cell testing device 1, as well as the difficulty of assembling the cell 7.

[0190] This embodiment provides a battery cell testing device 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features, such as... Figure 1 and Figure 2 As shown, the support structure 50 is equipped with a bracket 600.

[0191] The bracket 600 and the test structure 10 are located on the same side of the support structure 50.

[0192] The bracket 600 is used to support the wire harness so that the wire harness can be separated from the test structure 10.

[0193] In this embodiment, the support structure 50 is provided with a bracket 600, and the bracket 600 and the test structure 10 are located on the same side of the support structure 50.

[0194] After the battery cell 7 is assembled into the battery cell testing device 1, it needs to be electrically connected to the conductive part 700 of the battery cell 7 using a wire harness.

[0195] The bracket 600 serves to support the wire harness, thereby separating the wire harness from the test structure 10 and preventing interference between the wire harness and the components of the cell testing device 1. At the same time, it also meets the safety requirements of the cell testing device 1 during use, providing structural support to ensure the safety and reliability of the cell testing device 1.

[0196] This embodiment provides a battery cell testing device 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: when there are multiple test structures 10, the multiple test structures 10 are arranged in a matrix.

[0197] like Figure 1 , Figure 3 and Figure 4 As shown, the bracket 600 includes a first support plate 610, a second support plate 620, and a support plate 630.

[0198] One of the test structures 10 in the multi-column test structure 10 is located between the first support plate 610 and the second support plate 620.

[0199] The support plate 630 is arranged at intervals with the support structure 50, and the support plate 630 is connected between the first support plate 610 and the second support plate 620. The support plate 630 is used to support the wire harness.

[0200] In this embodiment, the bracket 600 includes a first support plate 610, a second support plate 620, and a support plate 630.

[0201] The first support plate 610 and the second support plate 620 are both connected to the support structure 50. The support plate 630 is arranged at intervals with the support structure 50, and the support plate 630 is connected between the first support plate 610 and the second support plate 620. It can be seen that the bracket 600 is a channel-shaped structure, and the slot of the channel-shaped structure faces the support structure 50.

[0202] When there are multiple test structures 10, the multiple test structures 10 are arranged in a matrix. That is, the multiple test structures 10 form a multi-row, multi-column structure.

[0203] One of the test structures 10 is located between the first support plate 610 and the second support plate 620, and the wire harness is located on the support plate 630.

[0204] This setup not only meets the requirement of separating the wire harness from multiple test structures 10, but also reduces the material input of the bracket 600, which helps to reduce the production cost of the cell testing device 1 and can meet the requirement of simultaneously testing the expansion force of multiple cells 7.

[0205] This embodiment provides a battery cell testing device 1. In addition to the technical features of the above embodiments, this embodiment further includes the following technical features: the first sensor 200 includes a pressure sensor and / or a displacement sensor.

[0206] When the cell testing device 1 includes a second sensor 400, the second sensor 400 includes a pressure sensor and / or a displacement sensor.

[0207] In this embodiment, when the cell testing device 1 includes only the first sensor 200, the first sensor 200 includes a pressure sensor and / or a displacement sensor.

[0208] When the first sensor 200 includes a pressure sensor, the pressure data from the first sensor 200 is used at least to determine the expansion force of the battery cell 7. The pressure sensor has advantages such as high accuracy, fast response, strong stability, and good durability.

[0209] When the first sensor 200 includes a displacement sensor, the position data of the first sensor 200 is used at least to determine the expansion force of the battery cell 7. The displacement sensor has advantages such as high accuracy, fast response, strong stability, and good durability.

[0210] In some technical solutions, optionally, the cell testing device 1 also includes a wire harness, which is disposed on the bracket 600 of the cell testing device 1 and electrically connected to the conductive part 700.

[0211] For example, the cell testing device 1 of this application has high compatibility, adjustable initial preload, and high testing accuracy.

[0212] For example, the clamping member 100 is locked by the connecting part 310 (e.g., bolt) and the locking part 320 (e.g. nut 320a) to adjust the initial preload, and it can be compatible with battery cells 7 of different thicknesses. The battery cell testing device 1 has high compatibility and is easy to operate.

[0213] For example, the battery cell testing device 1 includes a clamping member 100, a first sensor 200, and a connector 300. The clamping member 100 includes a first clamping plate 110, a second clamping plate 120, and a third clamping plate 130. The battery cell 7 is clamped between the first clamping plate 110 and the second clamping plate 120, and the first sensor 200 (e.g., the first sensor 200 includes a pressure sensor) is clamped between the second clamping plate 120 and the third clamping plate 130. Since the force transmission is mutual, the expansion force of the battery cell 7 will be equivalently transmitted to the pressure sensor. The tested pressure value has a small and stable deviation from the actual value, and the battery cell testing device 1 has high testing accuracy.

[0214] For example, the battery cell testing device 1 of this application has a simple structure, is easy to operate, and can test multiple battery cells 7 at the same time, and the testing efficiency of the battery cell testing device 1 is high.

[0215] The battery cell testing device 1 of this application has high compatibility. When testing different battery cells 7, only the distance between the first clamping plate 110 and the second clamping plate 120 needs to be adjusted. The production cost of the battery cell testing device 1 is low.

[0216] When the cell testing device 1 includes only the first sensor 200, the center of the cell clamping area 140 is positioned opposite to the center of the first sensor 200. When the cell testing device 1 includes both the first sensor 200 and the second sensor 400, the center of the cell clamping area 140 is positioned opposite to the center of the first sensor 200, and the center of the cell clamping area 140 is positioned opposite to the center of the second sensor 400. The cell testing device 1 has high testing accuracy and small error, which can improve the accuracy of test data. The test data can be stored in real time, facilitating monitoring and analysis by testing personnel.

[0217] The cell testing device 1 of this application is easy to operate, greatly reduces the preparation time before testing, and has high testing efficiency.

[0218] like Figure 2 and Figure 4 As shown, the battery cell testing device 1 includes 8 testing stations, each with a testing structure 10. Each testing station can test one battery cell 7.

[0219] For example, first loosen the bolts of the test structure 10, place the battery cell 7 to be tested into the battery clamping area enclosed by the first clamping plate 110 and the second clamping plate 120, and tighten the bolts and nuts 320a. While tightening the bolts and nuts 320a, observe the value of the pressure sensor until the value of the pressure sensor reaches the initial preload. Then, connect the wiring harness to the conductive part 700 of the battery cell 7 (e.g., the conductive part 700 includes a terminal) and the test can begin. During the test, the value of the pressure sensor will increase as the battery cell 7 expands.

[0220] In this application, the term "multiple" refers to two or more unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0221] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electric cell testing device, characterized by, The test structure comprises: a clamping member comprising a first clamping plate, a second clamping plate and a third clamping plate, the second clamping plate being located between the first clamping plate and the third clamping plate, and a space being enclosed between the first clamping plate and the second clamping plate; a first sensor abutting between the second clamping plate and the third clamping plate; a connecting member for connecting the first clamping plate, the second clamping plate and the third clamping plate, the second clamping plate being movable or deformable relative to the connecting member between the first clamping plate and the third clamping plate; when the battery cell in the battery cell clamping area expands, the first sensor generates data of the second clamping plate moving or deforming towards the third clamping plate. The connecting member can limit the distance between the first clamping plate and the third clamping plate; or 2. The battery cell testing device of claim 1, wherein, The clamping member further comprises a fourth clamping plate, the first clamping plate being located between the second clamping plate and the fourth clamping plate, the first clamping plate and the second clamping plate being movable or deformable relative to the connecting member between the third clamping plate and the fourth clamping plate, the connecting member being capable of limiting the distance between the fourth clamping plate and the third clamping plate, and the test structure further comprises a second sensor abutting between the first clamping plate and the fourth clamping plate, when the battery cell in the battery cell clamping area expands, the second sensor generates data of the first clamping plate moving or deforming towards the fourth clamping plate. The connecting member comprises:

3. The battery cell testing device of claim 2, wherein, a connecting portion penetrating through the clamping member in the direction from the first clamping plate to the second clamping plate, the second clamping plate being in clearance fit with the connecting portion, and one end of the connecting portion being provided with a first limiting portion; a locking portion detachably connected with the connecting portion, when the locking portion is assembled at the other end of the connecting portion away from the first limiting portion, the clamping member abuts between the first limiting portion and the locking portion; When the clamping member comprises the fourth clamping plate, the first clamping plate is in clearance fit with the connecting portion. The outer peripheral wall of the connecting portion is provided with an adjusting area, and the locking portion is movable in the length direction of the connecting portion at the adjusting area and is capable of being locked and fitted with the adjusting area.

4. The battery cell testing device of claim 3, wherein, The adjusting area is provided with an external thread, and the locking portion comprises a nut which is screwed with the external thread; or 5. The battery cell testing device of claim 4, wherein, The adjusting area is provided with a plurality of clamping positions which are arranged at intervals in the length direction of the connecting portion, and the locking portion is provided with a clasp which is clamped and fitted with the clamping positions; or The adjusting area is provided with a plurality of connecting holes which are arranged at intervals in the length direction of the connecting portion, and the locking portion and the connecting holes are locked and fitted through fasteners. The number of the connecting portions and the locking portions is both plural, each connecting portion is matched with one locking portion, and the plurality of connecting portions are arranged at intervals.

6. The battery cell testing device of claim 3, wherein, In the direction from the first clamping plate to the third clamping plate, the center of the battery cell clamping area is oppositely arranged with the center of the first sensor, and when the clamping member further comprises the second sensor, the center of the battery cell clamping area is oppositely arranged with the center of the second sensor.

7. The cell testing device of any one of claims 2 to 6, wherein, ​ 8. The cell testing device of any one of claims 2-6, wherein, When the number of the test structures is multiple, the multiple test structures are arranged in intervals.

9. The battery cell testing device of claim 8, wherein, Further comprising: a support structure, the test structure is arranged on the support structure in a plate shape, and the support structure is used for supporting the test structure; When the number of the test structures is multiple, the multiple test structures are arranged on the same side of the support structure.

10. The battery cell testing device of claim 9, wherein, When the connecting piece limits the interval between the first clamping plate and the third clamping plate, one of the first clamping plate and the third clamping plate is fixedly connected with the support structure, and the other one of the first clamping plate and the third clamping plate and the second clamping plate are detachably connected with the support structure; The support structure is provided with a second limiting part; One side of one of the first clamping plate and the third clamping plate, which is away from the second clamping plate, abuts against the second limiting part.

11. The battery cell testing device of claim 9, wherein, When the clamping piece includes the fourth clamping plate, one of the third clamping plate and the fourth clamping plate is fixedly connected with the support structure, and the other one of the third clamping plate and the fourth clamping plate, the first clamping plate and the second clamping plate are detachably connected with the support structure; The support structure is provided with a second limiting part; One side of one of the third clamping plate and the fourth clamping plate, which is away from the second clamping plate, abuts against the second limiting part.

12. The battery cell testing device of claim 9, wherein, The support structure is provided with a support, the support is arranged on the same side of the support structure as the test structure, and the support is used for supporting a wire harness so as to separate the wire harness from the test structure.

13. The battery cell testing device of claim 12, wherein, When the number of the test structures is multiple, the multiple test structures are arranged in a matrix, and the support includes: a first support plate; a second support plate; one column of the test structures in multiple columns of the test structures is arranged between the first support plate and the second support plate; a support plate, which is arranged in intervals with the support structure and is connected between the first support plate and the second support plate, and the support plate is used for supporting the wire harness.

14. The battery cell testing device of any one of claims 2-6, wherein, The first sensor includes a pressure sensor and / or a displacement sensor; When the battery cell testing device includes the second sensor, the second sensor includes a pressure sensor and / or a displacement sensor.

Images