A test device

Abstract

This application discloses a testing device, including a base plate, a first clamping assembly, a second clamping assembly, and a test piece. The base plate, the first clamping assembly, and the second clamping assembly enclose a receiving space for placing a battery module. Both the first and second clamping assemblies have a conductive layer on their sides facing the receiving space. The test piece is electrically connected to the conductive layer and is also adapted to be electrically connected to the battery module. The first and second clamping assemblies are respectively used to apply pressure to the battery module along a first direction and a second direction, so as to test the battery module through the test piece. Thus, according to actual needs, pressure can be applied to the battery module in different directions through the first or second clamping assembly, and the insulation withstand voltage performance of the battery module in that direction can be detected through the test piece. This allows for surface testing of the battery module in multiple directions, improving the accuracy of the testing and ensuring the insulation withstand voltage performance of the battery module.

Description

Technical Field

[0001] This application belongs to the field of battery manufacturing technology, specifically relating to a testing device. Background Technology

[0002] As the core unit of energy storage systems, energy storage modules are widely used in new energy, power systems, electric vehicles and other fields due to their advantages such as modular design, high energy density, integrated intelligent management and high environmental adaptability.

[0003] In related technologies, when performing insulation withstand voltage tests on energy storage modules, only the bottom surface of the energy storage module is tested. This may result in the insulation performance of other surfaces of the energy storage module not meeting the requirements, which could easily lead to short circuits during use. Utility Model Content

[0004] This application aims to provide a testing device that can solve the problem in related technologies where only the bottom surface of the energy storage module is tested when performing insulation withstand voltage testing on the energy storage module. This may result in the insulation performance of other surfaces of the energy storage module not meeting the requirements, which could easily lead to short circuits during use.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, embodiments of this application propose a testing device, comprising: a base plate, a first clamping assembly, a second clamping assembly, and a test piece. The testing device has a first direction and a second direction perpendicular to each other. The first clamping assembly is disposed on the base plate along the first direction, and the second clamping assembly is disposed on the base plate along the second direction. The base plate, the first clamping assembly, and the second clamping assembly enclose a receiving space for placing a battery module. A conductive layer is provided on the side of the first clamping assembly and the second clamping assembly facing the receiving space. The test piece is electrically connected to the conductive layer and is also adapted to be electrically connected to the battery module. The first clamping assembly is used to apply pressure to the battery module along the first direction, and the second clamping assembly is used to apply pressure to the battery module along the second direction, so as to test the battery module through the test piece.

[0007] Optionally, the first clamping assembly includes two first side plates, which are spaced apart on the base plate along the first direction, and the receiving space is formed between the two first side plates; one of the first side plates is fixedly connected to the base plate, and the other first side plate is movable relative to the base plate along the first direction to apply pressure to the battery module; the conductive layer is provided on the side of the first side plate facing the receiving space.

[0008] Optionally, the first clamping assembly further includes a first pressure measuring element, which is disposed on the side of the first side plate facing the receiving space, and is used to detect the pressure on the battery module in the first direction.

[0009] Optionally, the first clamping assembly further includes a drive member connected to the other first side plate, the drive member being used to move the other first side plate along the first direction to apply pressure to the battery module along the first direction.

[0010] Optionally, the second clamping assembly includes two second side plates, which are spaced apart on the base plate along the second direction, and the receiving space is formed between the two second side plates; one second side plate is fixedly connected to the base plate, and the other second side plate is movable relative to the base plate along the second direction to apply pressure to the battery module; the conductive layer is provided on the side of the second side plate facing the receiving space.

[0011] Optionally, the two first side plates are respectively a first sub-side plate and a second sub-side plate, and the two second side plates are respectively a third sub-side plate and a fourth sub-side plate; the fourth sub-side plate is fixedly connected to the bottom plate, and the third sub-side plate is disposed on one side of the fourth sub-side plate along the second direction; the first sub-side plate is fixedly connected to the bottom plate, and the second sub-side plate is disposed on one side of the first sub-side plate along the first direction; the first sub-side plate, the second sub-side plate, the third sub-side plate, the fourth sub-side plate, and the bottom plate enclose the accommodating space; a first connecting shaft is provided at one end of the first sub-side plate facing the third sub-side plate, a first hole is provided in the third sub-side plate, the first connecting shaft passes through the first hole, and the first connecting shaft can move along the second direction in the first hole;

[0012] The second sub-side plate is provided with a second connecting shaft at both ends along the second direction, and the third sub-side plate and the fourth sub-side plate are provided with a second hole extending along the first direction; the second connecting shaft passes through the corresponding second hole, and the second connecting shaft can move along the first direction and along the second direction in the second hole.

[0013] Optionally, the testing device further includes a plurality of fasteners; wherein, one of the fasteners is disposed on the side of the third sub-side plate opposite to the receiving space and is screwed to the first connecting shaft; another fastener is disposed on the side of the third sub-side plate opposite to the receiving space and is screwed to the second connecting shaft.

[0014] Optionally, the second clamping assembly further includes a second pressure measuring element, which is disposed on the side of the second side plate facing the receiving space, and is used to detect the pressure on the battery module in the second direction.

[0015] Optionally, the testing device further has a third direction, which is perpendicular to the first direction and the second direction respectively; the testing device further includes a cover plate, which is disposed along the third direction on the side of the base plate facing the receiving space; the side of the base plate facing the receiving space is provided with a conductive layer, and the cover plate is movable relative to the base plate along the third direction to apply pressure to the battery module.

[0016] Optionally, both the first side plate and the second side plate include a support layer and a buffer layer. The support layer is disposed on the side of the conductive layer away from the accommodating space, and the buffer layer is disposed between the support layer and the conductive layer.

[0017] In the embodiments of this application, the testing device includes a base plate, a first clamping assembly, a second clamping assembly, and a test piece. The testing device has a first direction and a second direction that are perpendicular to each other. The first clamping assembly is disposed on the base plate along the first direction, and the second clamping assembly is disposed on the base plate along the second direction. The base plate, the first clamping assembly, and the second clamping assembly enclose a receiving space for placing a battery module. A conductive layer is provided on the side of both the first and second clamping assemblies facing the receiving space. The test piece is electrically connected to the conductive layer and is also adapted to be electrically connected to the battery module. The first clamping assembly is used to apply pressure to the battery module along the first direction, and the second clamping assembly is used to apply pressure to the battery module along the second direction, so as to test the battery module through the test piece. In this way, operators can apply pressure to the battery module in the first direction through the first clamping assembly or in the second direction through the second clamping assembly according to actual needs, and test the insulation withstand voltage performance of the battery module in that direction through the test piece. This allows for surface testing of the battery module in multiple directions, improving the accuracy of the testing and thus ensuring the insulation withstand voltage performance of the battery module.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] 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:

[0020] Figure 1 This is a schematic diagram of a testing apparatus according to an embodiment of this application;

[0021] Figure 2 This is a partial schematic diagram of a test apparatus according to an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the first sub-side plate according to an embodiment of this application;

[0023] Figure 4 This is a schematic diagram of the second sub-side plate according to an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the third sub-side plate according to an embodiment of this application;

[0025] Figure 6 This is a cross-sectional view of the first side plate and the second side plate according to an embodiment of this application;

[0026] Figure 7 This is a schematic diagram of a battery module according to an embodiment of this application.

[0027] Figure label:

[0028] 1: Base plate; 2: First clamping assembly; 20: Conductive layer; 30: Support layer; 40: Buffer layer; 21: First side plate; 211: First sub-side plate; 212: Second sub-side plate; 213: First connecting shaft; 214: Second connecting shaft; 22: First pressure measuring element; 3: Second clamping assembly; 31: Second side plate; 311: Third sub-side plate; 312: Fourth sub-side plate; 313: First hole; 314: Second hole; 32: Second pressure measuring element; 4: Accommodation space; 5: Battery module; 6: Fastener; 7: Cover plate; X: First direction; Y: Second direction; Z: Third direction. Detailed Implementation

[0029] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0030] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0031] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] Before explaining the testing apparatus provided in the embodiments of this application, the application scenarios of the testing apparatus provided in the embodiments of this application will be specifically described first:

[0034] With the rapid development and widespread application of energy storage battery technology, energy storage modules with no side plates or bottom plates are gradually becoming a new industry trend. This innovative structural design, which directly exposes the insulating film on the sides and bottom, is increasingly favored by both manufacturers and end customers due to its significant advantages in terms of lightweighting, cost control, and heat dissipation performance.

[0035] In related technologies, insulation withstand voltage testing is generally only performed on the bottom surface of the energy storage module, which means that only a single surface of the energy storage module is tested. This makes it easy for the surfaces that have not undergone insulation withstand voltage testing to become abnormal after these energy storage modules are assembled into cabinet-type or container-type energy storage systems, posing a risk of short circuits. Furthermore, with the increase in usage time, there is a risk of smoke, fire, or even burning down the entire energy storage system.

[0036] Therefore, this application provides a testing device. The testing device provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0037] like Figure 1 , Figure 2 , Figure 6 and Figure 7As shown, a testing apparatus according to some embodiments of this application includes: a base plate 1, a first clamping assembly 2, a second clamping assembly 3, and a test piece. The testing apparatus has a first direction X and a second direction Y that are perpendicular to each other. The first clamping assembly 2 is disposed on the base plate 1 along the first direction X, and the second clamping assembly 3 is disposed on the base plate 1 along the second direction Y. The base plate 1, the first clamping assembly 2, and the second clamping assembly 3 enclose a receiving space 4, which is used to place a battery module 5. A conductive layer 20 is provided on the side of the first clamping assembly 2 and the second clamping assembly 3 facing the receiving space 4. The test piece is electrically connected to the conductive layer 20 and is also adapted to be electrically connected to the battery module 5. The first clamping assembly 2 is used to apply pressure to the battery module 5 along the first direction X, and the second clamping assembly 3 is used to apply pressure to the battery module 5 along the second direction Y, so as to test the battery module 5 through the test piece.

[0038] In this embodiment, the first clamping component 2 can apply pressure to the battery module 5 along the first direction X, and the second clamping component 3 can apply pressure to the battery module 5 along the second direction Y. In actual operation, the operator can select the first clamping component 2 or the second clamping component 3 to apply pressure to the battery module 5 according to actual needs, and then use a test piece (not shown in the figure) to detect the insulation performance of the surface of the battery module 5 under pressure from the first clamping component 2 or the second clamping component 3; thereby, the surface of the battery module 5 in multiple directions can be detected, improving the accuracy of the detection, and thus ensuring the overall insulation performance of the battery module 5 during use and reducing the risk of short circuit.

[0039] It should be explained that the testing device has a first direction X and a second direction Y that are perpendicular to each other. The first direction X is specifically the length direction of the testing device, which is also the length direction of the battery module 5 in actual use; the second direction Y is specifically the width direction of the testing device, which is also the width direction of the battery module 5 in actual use.

[0040] In practical applications, the base plate 1 can support the weight of the battery module 5. The first clamping component 2 is disposed on the base plate 1 along the first direction X, and the second clamping component 3 is disposed on the base plate 1 along the second direction Y. Thus, the first clamping component 2 and the second clamping component 3 enclose a receiving space 4 for placing the battery module 5. At the same time, the first clamping component 2 can apply pressure to the battery module 5 along the first direction X. In this way, when performing insulation withstand voltage tests on the two opposite surfaces of the battery module 5 in the first direction X, the required pressure can be applied through the first clamping component 2, and then the test can be performed through the test piece. Similarly, the second clamping component 3 can apply pressure to the battery module 5 along the second direction Y. In this way, when performing insulation withstand voltage tests on the two opposite surfaces of the battery module 5 in the second direction Y, the required pressure can be applied through the second clamping component 3, and then the test can be performed through the test piece. Thus, the operator can perform insulation withstand voltage tests on multiple surfaces of the battery module 5 according to actual needs, thereby improving the detection accuracy of the insulation withstand voltage test of the battery module 5.

[0041] It should be noted that the test piece is specifically an insulation withstand voltage tester. In actual use, such as... Figure 6 As shown, both the first clamping assembly 2 and the second clamping assembly 3 have a conductive layer 20 on the side facing the receiving space 4. Specifically, the first clamping assembly 2 has two opposing plates, and both plates have a conductive layer 20 on the side facing the receiving space 4. Similarly, the second clamping assembly 3 is also configured in the same way.

[0042] In practical use, when the first clamping component 2 or the second clamping component 3 applies pressure to the battery module 5 in the corresponding direction, the conductive layer 20 on the corresponding clamping component can be tightly attached to the corresponding outer surface of the battery module 5, thereby ensuring that the insulation withstand voltage tester can perform effective testing. Specifically, the insulation withstand voltage tester is electrically connected to the battery module 5 and the conductive layer 20 respectively. After the first clamping component 2 and / or the second clamping component 3 applies corresponding pressure to the battery module 5, the insulation withstand voltage tester is powered on, and thus effective insulation withstand voltage testing of the battery module 5 can be achieved.

[0043] In specific applications, the conductive layer 20 is a thin-film flexible conductive material to ensure that the conductive layer 20 can fully adhere to the battery module 5. Specifically, the conductive layer 20 can be copper foil, aluminum foil, or metal mesh, etc., as long as it can fully adhere to the battery module 5 and conduct electricity. Those skilled in the art can set it according to actual needs, and this application does not limit it.

[0044] like Figure 1As shown in the embodiment of this application, the first clamping assembly 2 includes two first side plates 21. The two first side plates 21 are spaced apart on the base plate 1 along the first direction X, and the receiving space 4 is formed between the two first side plates 21. One of the first side plates 21 is fixedly connected to the base plate 1, and the other first side plate 21 can move relative to the base plate 1 along the first direction X to apply pressure to the battery module 5. A conductive layer 20 is provided on the side of the first side plate 21 facing the receiving space 4.

[0045] In this embodiment, one first side plate 21 is fixedly connected to the base plate 1, and the other first side plate 21 can move relative to the base plate 1 along the first direction X. Thus, the other first side plate 21 can push the battery module 5 to move in the first direction X, so that the two surfaces of the battery module 5 in the first direction X abut against the two first side plates 21, so that the conductive layer 20 on the first side plate 21 is in close contact with the battery module 5. At the same time, it can give the two surfaces of the battery module 5 in the first direction X a preset pressure for insulation withstand voltage test. Thus, pressure can be applied to the battery module 5 through the two simple first side plates 21.

[0046] In specific applications, one first side plate 21 is fixedly connected to the base plate 1, which can be done by means of bolt connection, bonding, welding, etc. Those skilled in the art can set it according to actual needs, and this application does not limit it; the other first side plate 21 can move relative to the base plate 1 along the first direction X. This can be done by the operator manually pushing the other first side plate 21 relative to the base plate 1, or by using a driving component to move the other first side plate 21. Those skilled in the art can set it according to actual needs, and this application does not limit it.

[0047] It should be noted that, in actual use, the conductive layer 20 disposed on the side of the first side plate 21 facing the accommodating space 4 has a projected area along the first direction X that is greater than or equal to the projected area of ​​the battery module 5 along the first direction X. Thus, the conductive layer 20 can cover the entire surface area of ​​the battery module 5 along the first direction X, so as to ensure the accuracy of the detection results.

[0048] like Figure 2 As shown, in some embodiments of this application, the first clamping assembly 2 further includes a first pressure measuring element 22, which is disposed on the side of the first side plate 21 facing the receiving space 4. The first pressure measuring element 22 is used to detect the pressure on the battery module 5 in the first direction X.

[0049] In this embodiment of the application, by providing a first pressure measuring element 22 on the side of the first side plate 21 facing the accommodating space 4, the pressure on the battery module 5 in the first direction X can be detected, thereby ensuring that the pressure on the battery module 5 in the first direction X meets the requirements of the insulation withstand voltage test, so as to ensure the accuracy of the insulation withstand voltage test on the battery module 5.

[0050] In specific applications, the first pressure measuring element 22 is a pressure sensor, which can be any one of the following: strain gauge pressure sensor, piezoresistive MEMS sensor, capacitive pressure sensor, smart thin film sensor, etc. Those skilled in the art can choose according to the actual situation, and this application does not limit it.

[0051] Understandably, the first pressure measuring element 22 is disposed on the side of the first side plate 21 facing the receiving space 4, that is, the first pressure measuring element 22 is disposed on the side of the conductive layer 20 away from the first side plate 21. When the first side plate 21 applies pressure to the battery module 5 in the first direction X, the first pressure measuring element 22 can abut against the battery module 5 and the first side plate 21 in the first direction X, thereby measuring the magnitude of the pressure applied by the first side plate 21 to the battery module 5.

[0052] In practical applications, the first pressure measuring element 22 is a single-point flexible thin-film pressure sensor, which can be set at the center of the first side plate 21. Of course, the first pressure measuring element 22 can also be a multi-point flexible thin-film pressure sensor to cover more areas of the first side plate 21 and improve the accuracy of pressure detection results. Those skilled in the art can set it according to the actual situation, and this application does not limit it.

[0053] Understandably, when the first pressure measuring element 22 is a single-point flexible thin-film pressure sensor, multiple first pressure measuring elements 22 can be set, and these multiple first pressure measuring elements 22 can be distributed on the first side plate 21 to detect the pressure applied to multiple areas of the first side plate 21, thereby improving the accuracy of the pressure detection results. For example, as... Figure 2 As shown, three first pressure measuring elements 22 are provided on the side of the first side plate 21 facing the accommodating space 4. The three first pressure measuring elements 22 are spaced apart on the first side plate 21. Of course, the number of first pressure measuring elements 22 can also be four, five, six, seven, etc.

[0054] like Figure 2 As shown, in some embodiments of this application, the first clamping assembly 2 further includes a driving member (not shown in the figure) connected to another first side plate 21. The driving member is used to drive the other first side plate 21 to move along the first direction X to apply pressure to the battery module 5 along the first direction X.

[0055] In this embodiment, the driving component is connected to another first side plate 21. The driving component can drive the other first side plate 21 to move along the first direction X, thereby applying pressure to the battery module 5 in the first direction X. This eliminates the need for manual pressure application by operators, improving the operability of the testing device and the accuracy of the applied pressure.

[0056] In specific applications, the driving component can be any one of a linear motor, pneumatic compressor, hydraulic press, etc., capable of pushing the other first side plate 21 along the first direction X to apply pressure to the battery module 5 in the first direction X. Those skilled in the art can set it according to actual needs, and this application does not limit it.

[0057] Understandably, in actual use, the driving end of the driving component is connected to the first side plate 21. When the driving end moves along the first direction X, it can drive the first side plate 21 to move, thereby applying pressure to the battery module 5 in the first direction X. During the movement and pressure application process, the first side plate 21 is parallel to the surface of the battery module 5 in the first direction X, so as to ensure that all areas of the surface of the battery module 5 in the first direction X are under pressure balance.

[0058] like Figure 1 As shown, in some embodiments of this application, the second clamping assembly 3 includes two second side plates 31, which are spaced apart on the base plate 1 along the second direction Y, and a receiving space 4 is formed between the two second side plates 31; one second side plate 31 is fixedly connected to the base plate 1, and the other second side plate 31 can move relative to the base plate 1 along the second direction Y to apply pressure to the battery module 5; a conductive layer 20 is provided on the side of the second side plate 31 facing the receiving space 4.

[0059] In this embodiment, a second side plate 31 is fixedly connected to the base plate 1 and simultaneously fixedly connected to a first side plate 21; another second side plate 31 can move relative to the base plate 1 along the second direction Y, thereby pushing the battery module 5 to move upward in the second direction Y, so that the two surfaces of the battery module 5 in the second direction Y abut against the two second side plates 31, so that the conductive layer 20 on the second side plate 31 is in close contact with the battery module 5, and at the same time, it can give the two surfaces of the battery module 5 in the second direction Y a preset pressure to perform an insulation withstand voltage test, thereby enabling pressure to be applied to the battery module 5 through the two simple second side plates 31.

[0060] In specific applications, a second side plate 31 is fixedly connected to the base plate 1, which can be done by bolting, bonding, welding, or other methods. Those skilled in the art can set it according to actual needs, and this application does not impose any restrictions on this. That is, the non-moving first side plate 21 is fixedly connected to the base plate 1 and the non-moving second side plate 31 respectively, forming two side walls of the accommodating space 4. The other second side plate 31 can move relative to the base plate 1 along the second direction Y. This can be done by the operator manually pushing the other second side plate 31 relative to the base plate 1, or by using a driving component to move the other second side plate 31. Those skilled in the art can set it according to actual needs, and this application does not impose any restrictions on this.

[0061] It should be noted that, in actual use, the conductive layer 20 disposed on the side of the second side plate 31 facing the accommodating space 4 has a projected area along the first direction X that is greater than or equal to the projected area of ​​the battery module 5 along the second direction Y. Thus, the conductive layer 20 can cover the entire surface area of ​​the battery module 5 along the second direction Y, so as to ensure the accuracy of the detection results.

[0062] like Figure 2 As shown, the two first side plates 21 are respectively the first sub-side plate 211 and the second sub-side plate 212, and the two second side plates 31 are respectively the third sub-side plate 311 and the fourth sub-side plate 312; the fourth sub-side plate 312 is fixedly connected to the bottom plate 1, and the third sub-side plate 311 is located on one side of the fourth sub-side plate 312 along the second direction Y; the first sub-side plate 211 is fixedly connected to the bottom plate 1, and the second sub-side plate 212 is located on one side of the first sub-side plate 211 along the first direction X; the first sub-side plate 211, the second sub-side plate 212, the third sub-side plate 311, the fourth sub-side plate 312 and the bottom plate 1 enclose and form an accommodating space 4; the first sub-side plate 211 A first connecting shaft 213 is provided at one end facing the third sub-side plate 311. A first hole 313 is provided in the third sub-side plate 311. The first connecting shaft 213 passes through the first hole 313 and can move in the first hole 313 along the second direction Y. A second connecting shaft 214 is provided at both ends of the second sub-side plate 212 along the second direction Y. A second hole 314 extending along the first direction X is provided in both the third sub-side plate 311 and the fourth sub-side plate 312. The second connecting shaft 214 passes through the corresponding second hole 314 and can move in the second hole 314 along the first direction X and along the second direction Y.

[0063] In this embodiment, the first sub-side plate 211 is fixedly connected to the bottom plate 1, and the fourth sub-side plate 312 is fixedly connected to both the bottom plate 1 and the first sub-side plate 211, thereby enclosing and forming two adjacent side walls of the accommodating space 4; Figure 3As shown, the first sub-side plate 211 has a first connecting shaft 213 at one end facing the third sub-side plate 311, and the third sub-side plate 311 has a first hole 313, through which the first connecting shaft 213 passes; Figure 4 As shown, the second sub-side plate 212 is provided with a second connecting shaft 214 at both ends along the second direction Y, as... Figure 5 As shown, both the third sub-side plate 311 and the fourth sub-side plate 312 are provided with a second hole 314 extending along the first direction X. The second connecting shaft 214 passes through the corresponding second hole 314. Thus, when the third sub-side plate 311 is pushed to apply pressure to the battery module 5 along the second direction Y, the first hole 313 and the second hole 314 can move relative to the first connecting shaft 213 and the second connecting shaft 214 along the second direction Y. When the second sub-side plate 212 is pushed to apply pressure to the battery module 5 along the first direction X, the second hole 314 can move relative to the second connecting shaft 214 along the first direction X. Thus, pressure can be applied to the battery module 5 in the first direction X and the second direction Y to perform insulation withstand voltage tests on multiple surfaces of the battery module 5.

[0064] Understandably, the second hole 314 extends along the first direction X, that is, the second hole 314 is an elongated hole along the first direction X. When the second connecting shaft 214 passes through the second hole 314, it can move relative to the second hole 314 along the first direction X, and at the same time, it can move along the second direction Y, so as to satisfy the second sub-side plate 212 to apply pressure to the battery module 5 in the first direction X, and to satisfy the third sub-side plate 311 to apply pressure to the battery module 5 in the second direction Y.

[0065] In specific applications, the circumferential shape and size of the first connecting shaft 213 are adapted to the first hole 313, so that the first connecting shaft 213 can be inserted into the first hole 313. The design of the second connecting shaft 214 and the second hole 314 is similar.

[0066] like Figure 1 As shown, in some embodiments of this application, the testing device further includes a plurality of fasteners 6; wherein, one fastener 6 is disposed on the side of the third sub-side plate 311 away from the receiving space 4 and is screwed to the first connecting shaft 213; another fastener 6 is disposed on the side of the third sub-side plate 311 away from the receiving space 4 and is screwed to the second connecting shaft 214.

[0067] In this embodiment, a fastener 6 is screwed to the first connecting shaft 213, thereby fixing one end of the third sub-side plate 311 with the first hole 313 to the first sub-side plate 211. Another fastener 6 is screwed to the second connecting shaft 214, thereby fixing one end of the third sub-side plate 311 with the second hole 314 to the second sub-side plate 212. In this way, when the first sub-side plate 211 and / or the third sub-side plate 311 apply corresponding pressure to the battery module 5, the fasteners 6 can fix the third sub-side plate 311 and the first sub-side plate 211 to ensure that the pressure remains unchanged, thereby ensuring the accuracy of the detection.

[0068] In specific applications, fastener 6 is specifically a nut. The specific size of the nut is determined according to the threads on the first connecting shaft 213 and the second connecting shaft 214. Those skilled in the art can set it according to actual needs, and this application does not limit it.

[0069] In some embodiments of this application, a fastener 6 is also provided on the side of the fourth sub-side plate 312 away from the receiving space 4. The fastener 6 is screwed to the second connecting shaft 214 facing the fourth sub-side plate 312, thereby fixing the second sub-side plate 212 and the fourth sub-side plate 312 to improve the stability of the second sub-side plate 212 when pressure is applied to the battery module 5.

[0070] like Figure 1 and Figure 2 As shown, in some embodiments of this application, the second clamping assembly 3 further includes a second pressure measuring element 32, which is disposed on the side of the second side plate 31 facing the receiving space 4. The second pressure measuring element 32 is used to detect the pressure on the battery module 5 in the second direction Y.

[0071] In this embodiment of the application, by providing a second pressure measuring element 32 on the side of the second side plate 31 facing the accommodating space 4, the pressure on the battery module 5 in the second direction Y can be detected, thereby ensuring that the pressure on the battery module 5 in the second direction Y meets the requirements of the insulation withstand voltage test, so as to ensure the accuracy of the insulation withstand voltage test on the battery module 5.

[0072] In specific applications, the second pressure measuring element 32 is a pressure sensor, which can be any one of the following: strain gauge pressure sensor, piezoresistive MEMS sensor, capacitive pressure sensor, smart thin film sensor, etc. Those skilled in the art can choose according to the actual situation, and this application does not limit it.

[0073] Understandably, the second pressure measuring element 32 is disposed on the side of the second side plate 31 facing the receiving space 4, that is, the second pressure measuring element 32 is disposed on the side of the conductive layer 20 away from the second side plate 31. When the second side plate 31 applies pressure to the battery module 5 in the second direction Y, the second pressure measuring element 32 can abut against the battery module 5 and the second side plate 31 in the second direction Y, thereby measuring the magnitude of the pressure applied by the second side plate 31 to the battery module 5.

[0074] In practical applications, the second pressure measuring element 32 is a single-point flexible thin-film pressure sensor, which can be set at the center of the second side plate 31. Of course, the second pressure measuring element 32 can also be a multi-point flexible thin-film pressure sensor to cover more areas of the second side plate 31 and improve the accuracy of pressure detection results. Those skilled in the art can set it according to the actual situation, and this application does not limit it.

[0075] Understandably, when the second pressure measuring element 32 is a single-point flexible thin-film pressure sensor, multiple second pressure measuring elements 32 can be configured, with the multiple second pressure measuring elements 32 distributed on the second side plate 31 to detect the pressure applied to multiple areas of the second side plate 31, thereby improving the accuracy of the pressure detection results. For example, such as... Figure 2 As shown, three second pressure measuring elements 32 are provided on the side of the second side plate 31 facing the accommodating space 4. Specifically, the three second pressure measuring elements 32 are spaced apart on the second side plate 31. Of course, the number of second pressure measuring elements 32 can also be four, five, six, seven, etc.

[0076] In some embodiments of this application, the second clamping assembly 3 further includes a second driving member (not shown in the figure) connected to the third sub-side plate 311. The second driving member is used to drive the third sub-side plate 311 to move along the second direction Y, so as to apply pressure to the battery module 5 along the second direction Y. This eliminates the need for operators to manually push the third sub-side plate 311 to apply pressure to the battery module 5, improving the operability of the testing device and reducing the complexity of operation.

[0077] In specific applications, the second driving component can be any one of a linear motor, pneumatic compressor, hydraulic press, etc., capable of pushing the third sub-side plate 311 along the second direction Y to apply pressure to the battery module 5 in the second direction Y. Those skilled in the art can set it according to actual needs, and this application does not limit it.

[0078] like Figure 1As shown, in some embodiments of this application, the testing device further has a third direction Z, which is perpendicular to the first direction X and the second direction Y respectively; the testing device also includes a cover plate 7, which is disposed along the third direction Z on the side of the base plate 1 facing the receiving space 4; the side of the base plate 1 facing the receiving space 4 is provided with a conductive layer 20, and the cover plate 7 can move relative to the base plate 1 along the third direction Z to apply pressure to the battery module 5.

[0079] In this embodiment, the cover plate 7 can move relative to the base plate 1 along the third direction Z to apply pressure to the battery module 5. The base plate 1 is provided with a conductive layer 20 on the side facing the receiving space 4, so that the insulation withstand voltage test can be performed on the side surface of the battery module 5 facing the base plate 1. Thus, the insulation withstand voltage test can be performed on the five surfaces of the battery module 5 ("bottom, front, back, left, and right"), ensuring the overall insulation performance of the battery module 5 and reducing the risk of short circuit after assembly into an energy storage system.

[0080] It should be explained that the testing device has a third direction Z, which specifically refers to the height direction of the testing device. In actual use, the third direction Z is also the height direction of the battery module 5.

[0081] In specific applications, the cover plate 7 is placed on the side of the battery module 5 away from the base plate 1. By setting weights on the cover plate 7, manually applying pressure, or applying pressure to the cover plate 7 through a driving component, pressure is applied to the battery module 5 in the third direction Z. In this way, the insulation performance of the bottom of the battery module 5 can be tested by connecting the conductive layer 20 on the base plate 1 and the battery module 5 through the test piece.

[0082] like Figure 6 As shown, in some embodiments of this application, the first side plate 21 and the second side plate 31 both include a support layer 30 and a buffer layer 40. The support layer 30 is disposed on the side of the conductive layer 20 away from the receiving space 4, and the buffer layer 40 is disposed between the support layer 30 and the conductive layer 20.

[0083] In the embodiments of this application, both the first side plate 21 and the second side plate 31 include a support layer 30, a buffer layer 40 and a conductive layer 20 stacked together, thereby having a certain rigidity and being able to apply pressure to the battery module 5. At the same time, the buffer layer 40 can avoid damaging the insulating film on the surface of the battery module 5, while the conductive layer 20 is used for the test piece to perform insulation withstand voltage test, thereby improving the reliability of the test device.

[0084] In specific applications, the support layer 30 can be a plate with a certain rigidity, such as a steel plate or an aluminum plate, and the buffer layer 40 can be a material with elasticity, such as compressed foam or foam. In actual processing, the support layer 30, the buffer layer 40 and the conductive layer 20 are bonded together in sequence to form the first side plate 21 and the second side plate 31.

[0085] In some embodiments of this application, the specific structure of the base plate 1 is the same as that of the first side plate 21 and the second side plate 31, and also includes a support layer 30, a buffer layer 40 and a conductive layer 20, so that when pressure is applied to the battery module 5 in the Z direction by a third party, the insulating film on the surface of the battery module 5 will not be damaged, and the insulation withstand voltage test can be performed through the conductive layer 20.

[0086] In some embodiments of this application, the testing device further includes a switch module and a display module. The switch module is electrically connected to the first pressure measuring element 22 and the second pressure measuring element 32, and is also electrically connected to the display module. The switch module can control the start and stop of the first pressure measuring element 22 and the second pressure measuring element 32, and transmit the pressure values ​​detected by the first pressure measuring element 22 and the second pressure measuring element 32 to the display module. The display module displays the pressure values ​​for the operator to view.

[0087] In some embodiments of this application, the usage process of the testing device proposed in the embodiments of this application is briefly described:

[0088] First, place the battery module 5 into the receiving space 4 and determine the surface of the battery module 5 to be tested, for example, the surface in the first direction X. Turn on the corresponding first pressure testing device 22 through the switch module. Connect the test device to the conductive layer 20 on the first sub-side plate 211 and / or the second sub-side plate 212, as well as the positive / negative electrode of the battery module 5.

[0089] Secondly, the second sub-side plate 212 is moved by the drive component to apply pressure to the battery module 5 in the first direction X. The pressure on the battery module 5 is observed by the display module to ensure that it meets the test requirements. When the pressure value reaches the preset value, the fasteners 6 on the first connecting shaft 213 and the second connecting shaft 214 are locked to ensure that the pressure on the battery module 5 remains unchanged.

[0090] Finally, the test piece (insulation withstand voltage tester) is opened, and the insulation withstand voltage test is performed according to the requirements of GB / 36276-2023 standard. Specifically, during the insulation resistance test, when the test piece (insulation withstand voltage tester) applies a voltage of 500V to the conductive layer 20 and the battery module 5 and holds it for 60s, if the battery module 5 does not experience breakdown or flashover, and the measured insulation resistance is ≥1000Ω / V, then the insulation resistance of the surface of the battery module 5 in the first direction X meets the requirements. During the insulation withstand voltage test, when the test piece (insulation withstand voltage tester) applies a voltage of 2800V to the conductive layer 20 and the battery module 5 and holds it for 60s, if the battery module 5 does not experience breakdown or flashover, and the leakage current is ≤10mA, then the insulation withstand voltage performance of the surface of the battery module 5 in the first direction X meets the requirements.

[0091] Similarly, when testing the surface or bottom of the battery module 5 in the second direction Y, adjustments can be made accordingly.

[0092] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example 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.

[0093] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A testing device, characterized in that, include: The testing device comprises a base plate (1), a first clamping assembly (2), a second clamping assembly (3), and a test piece. The testing device has a first direction (X) and a second direction (Y) that are perpendicular to each other. The first clamping assembly (2) is disposed on the base plate (1) along the first direction (X), and the second clamping assembly (3) is disposed on the base plate (1) along the second direction (Y). The base plate (1), the first clamping assembly (2), and the second clamping assembly (3) enclose a receiving space (4) for placing a battery module (5). The first clamping assembly (2) and the second clamping assembly (3) are each provided with a conductive layer (20) on the side facing the receiving space (4). The test piece is electrically connected to the conductive layer (20) and is also adapted to be electrically connected to the battery module (5). The first clamping component (2) is used to apply pressure to the battery module (5) along the first direction (X), and the second clamping component (3) is used to apply pressure to the battery module (5) along the second direction (Y) to test the battery module (5) through the test piece.

2. The testing apparatus according to claim 1, characterized in that, The first clamping assembly (2) includes two first side plates (21), which are spaced apart on the base plate (1) along the first direction (X), and the receiving space (4) is formed between the two first side plates (21); one of the first side plates (21) is fixedly connected to the base plate (1), and the other first side plate (21) is movable relative to the base plate (1) along the first direction (X) to apply pressure to the battery module (5); the conductive layer (20) is provided on the side of the first side plate (21) facing the receiving space (4).

3. The testing apparatus according to claim 2, characterized in that, The first clamping assembly (2) further includes a first pressure measuring element (22), which is disposed on the side of the first side plate (21) facing the receiving space (4). The first pressure measuring element (22) is used to detect the pressure on the battery module (5) in the first direction (X).

4. The testing apparatus according to claim 2, characterized in that, The first clamping assembly (2) further includes a drive member connected to the other first side plate (21), the drive member being used to drive the other first side plate (21) to move along the first direction (X) to apply pressure to the battery module (5) along the first direction (X).

5. The testing apparatus according to any one of claims 2-4, characterized in that, The second clamping assembly (3) includes two second side plates (31), which are spaced apart on the base plate (1) along the second direction (Y). The receiving space (4) is formed between the two second side plates (31). One second side plate (31) is fixedly connected to the base plate (1), and the other second side plate (31) is movable relative to the base plate (1) along the second direction (Y) to apply pressure to the battery module (5). The conductive layer (20) is provided on the side of the second side plate (31) facing the receiving space (4).

6. The testing apparatus according to claim 5, characterized in that, The two first side plates (21) are respectively the first sub-side plate (211) and the second sub-side plate (212), and the two second side plates (31) are respectively the third sub-side plate (311) and the fourth sub-side plate (312); The fourth sub-side plate (312) is fixedly connected to the bottom plate (1), and the third sub-side plate (311) is disposed on one side of the fourth sub-side plate (312) along the second direction (Y); the first sub-side plate (211) is fixedly connected to the bottom plate (1), and the second sub-side plate (212) is disposed on one side of the first sub-side plate (211) along the first direction (X); the first sub-side plate (211), the second sub-side plate (212), the third sub-side plate (311), the fourth sub-side plate (312), and the bottom plate (1) enclose the accommodating space (4); The first sub-side plate (211) is provided with a first connecting shaft (213) at one end facing the third sub-side plate (311), the third sub-side plate (311) is provided with a first hole (313), the first connecting shaft (213) passes through the first hole (313), and the first connecting shaft (213) can move in the second direction (Y) in the first hole (313); The second sub-side plate (212) is provided with a second connecting shaft (214) at both ends along the second direction (Y). The third sub-side plate (311) and the fourth sub-side plate (312) are provided with a second hole (314) extending along the first direction (X). The second connecting shaft (214) passes through the corresponding second hole (314) and can move along the first direction (X) and along the second direction (Y) in the second hole (314).

7. The testing apparatus according to claim 6, characterized in that, The testing device also includes multiple fasteners (6); One of the fasteners (6) is located on the side of the third sub-side plate (311) away from the receiving space (4) and is screwed to the first connecting shaft (213); the other fastener (6) is located on the side of the third sub-side plate (311) away from the receiving space (4) and is screwed to the second connecting shaft (214).

8. The testing apparatus according to claim 6, characterized in that, The second clamping assembly (3) further includes a second pressure measuring element (32), which is disposed on the side of the second side plate (31) facing the receiving space (4). The second pressure measuring element (32) is used to detect the pressure on the battery module (5) in the second direction (Y).

9. The testing apparatus according to any one of claims 2-4, characterized in that, The testing device also has a third direction (Z), which is perpendicular to the first direction (X) and the second direction (Y) respectively; The testing device also includes a cover plate (7), which is disposed on the side of the base plate (1) facing the receiving space (4) along the third direction (Z); the side of the base plate (1) facing the receiving space (4) is provided with a conductive layer (20), and the cover plate (7) is movable relative to the base plate (1) along the third direction (Z) to apply pressure to the battery module (5).

10. The testing apparatus according to claim 5, characterized in that, Both the first side plate (21) and the second side plate (31) include a support layer (30) and a buffer layer (40). The support layer (30) is disposed on the side of the conductive layer (20) away from the receiving space (4), and the buffer layer (40) is disposed between the support layer (30) and the conductive layer (20).

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