Battery cell insulation testing device

Abstract

The utility model provides an electrical core insulation testing device, which comprises a restraining tray and an insulation testing mechanism, and is characterized in that the restraining tray comprises supports, and insulating parts and metal parts which are arranged between the supports, and two adjacent insulating parts are arranged at intervals so as to form an accommodating space between the two adjacent insulating parts for accommodating an electrical core to be tested; the metal part is positioned on one side, deviating from the accommodating space, of the insulating part; the restraining tray stabilizes the to-be-tested battery cell in the accommodating space, so that the accuracy and the stability of the test are ensured; the insulation testing mechanism comprises a tester and a first electric connecting piece and a second electric connecting piece which are electrically connected with the tester, the first electric connecting piece is in contact with the shell of the battery cell to be tested, and the second electric connecting piece is in contact with a metal piece close to any side of the battery cell to be tested, so that the resistance or current between the shell of the battery cell and the metal piece can be quickly and accurately measured; therefore, whether the insulation performance of the battery cell is good or not is efficiently judged, insulation defects can be found in time, and the production efficiency and the product quality are improved.

Description

Technical Field

[0001] This utility model belongs to the field of battery cell testing, and specifically relates to a battery cell insulation testing device. Background Technology

[0002] During the battery cell production process, battery cell formation and capacity testing equipment is used to batch form and activate the battery cells. This involves applying voltage between the positive and negative terminals of the battery cell using an external power source. Only a precise and stable voltage and current can ensure that the internal activation of the battery cell is stable and sufficient, forming a stable and virtuous cycle of electrochemical reaction.

[0003] During the cell formation and capacity testing process, there is a risk of short circuit if the cell casing is connected to the external supporting metal structure. Utility Model Content

[0004] This utility model provides a battery cell insulation testing device to solve the problem of short circuits, smoke, and fires caused by foreign objects in the metal layer and battery cell casing during the battery cell formation and capacity testing process.

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

[0006] This application provides a battery cell insulation testing device, including: a restraint tray, the restraint tray including a support and an insulating member and a metal member disposed between the support, two adjacent insulating members are spaced apart to form an accommodating space for placing the battery cell to be tested, and the metal member is located on the side of the insulating member away from the accommodating space;

[0007] An insulation testing mechanism includes a tester and a first electrical connector and a second electrical connector electrically connected to the tester. The first electrical connector is used to contact the outer casing of the battery cell under test, and the second electrical connector is used to contact the metal part near either side of the battery cell under test, for measuring the resistance or current between the outer casing of the battery cell under test and the metal part.

[0008] Optionally, the cell insulation testing device further includes a mounting frame and a first drive mechanism disposed on the mounting frame;

[0009] The first driving mechanism is connected to the first electrical connector and the second electrical connector to drive the first electrical connector and the second electrical connector to move toward the restraint tray so as to contact the housing of the battery cell under test and the metal part.

[0010] Optionally, the cell insulation testing device further includes at least one electrical connector bracket, which is connected to the first driving mechanism. The first electrical connector and the second electrical connector are disposed on the electrical connector bracket so that the electrical connector bracket is driven by the first driving mechanism to move toward the restraint tray so that the first electrical connector and the second electrical connector abut against the outer shell of the cell under test and the metal part.

[0011] Optionally, the cell insulation testing device further includes a second drive mechanism, which is disposed on the mounting frame;

[0012] The second drive mechanism is connected to the restraint tray and is used to drive the restraint tray toward the first electrical connector and the second electrical connector so that the outer shell of the battery cell under test and the metal part come into contact with the first electrical connector and the second electrical connector.

[0013] Optionally, the cell insulation testing device further includes a third drive mechanism, which is disposed on the mounting frame;

[0014] The electrical connector bracket is connected to the third drive mechanism, which drives the electrical connector bracket to translate along the bearing plane of the restraint tray, so that the first electrical connector contacts the outer shell of the battery cell under test at different positions.

[0015] Optionally, the cell insulation testing device further includes a lifting platform;

[0016] The lifting platform is mounted on the mounting frame, the restraint tray is mounted on the lifting platform, the second drive mechanism is mounted on the mounting frame and driven to be connected to the restraint tray, and the second drive mechanism and the lifting platform are located on the same side of the restraint tray;

[0017] The first drive mechanism is disposed on the mounting frame and located on the side of the restraint tray away from the second drive mechanism. The first drive mechanism is connected to the first electrical connector and the second electrical connector on the side near the restraint tray. The first drive mechanism is used to drive the first electrical connector and the second electrical connector to move toward the restraint tray.

[0018] Optionally, the side surface of the metal part facing the insulating part is a limiting surface, the metal part has a limiting groove on the limiting surface, and the side surface of the insulating part facing the limiting surface is provided with a limiting block adapted to the limiting groove.

[0019] The metal part has protrusions at both ends facing the limiting surface. The protrusions have limiting portions on the side away from the insulating part. The limiting portions are parallel to the limiting surface. The protrusions and the limiting surface are used to cover the edge of the insulating part.

[0020] Optionally, the insulation testing mechanism further includes a channel switching board, which has an output interface and at least two acquisition interfaces;

[0021] The channel switching board is used to be electrically connected to the tester through the output interface;

[0022] At least one of the acquisition interfaces is used to be electrically connected to one end of the first electrical connector, and the other end of the first electrical connector is used to abut against the outer shell of the battery cell under test.

[0023] At least one of the acquisition interfaces is used for electrical connection to one end of the second electrical connector, and the other end of the second electrical connector is used for abutting against the metal part.

[0024] Optionally, the number of the first electrical connectors is at least one, and the number of the second electrical connectors is at least two;

[0025] The acquisition interface includes at least one first acquisition interface a and at least two second acquisition interfaces b, wherein the first acquisition interface a is used to be electrically connected to the first electrical connector, and the second acquisition interface b is used to be electrically connected to the second electrical connector;

[0026] When the first electrical connector abuts against the outer shell of the battery cell under test, and a second electrical connector abuts against the metal part on one side of the battery cell under test, a first detection channel is formed.

[0027] When the first electrical connector abuts against the outer casing of the battery cell under test, and the other second electrical connector abuts against the metal part on the other side of the battery cell under test, a second detection channel is formed.

[0028] The channel switching board is used to switch between the first detection channel and the second detection channel.

[0029] Optionally, the battery cells under test are arranged in an M-row * N-column array on the restraint tray, where M ≥ , N ≥ ;

[0030] The number of the first electrical connectors is M*N; in each row, the number of the first electrical connectors is N, and each first electrical connector is arranged in a one-to-one correspondence with each of the cells under test; the number of the second electrical connectors is N+, and they are arranged at intervals with the first electrical connectors.

[0031] In each row, the acquisition interface includes N first acquisition interfaces a and N+ second acquisition interfaces b, where the first acquisition interfaces a are used to be electrically connected to the first electrical connector, and the second acquisition interfaces b are used to be electrically connected to the second electrical connector;

[0032] The outer casing of any of the battery cells under test is used to abut against one of the first electrical connectors. When the metal part on one side of the battery cell under test is used to abut against one of the second electrical connectors, a first detection channel is formed. When the metal part on the other side of the battery cell under test is used to abut against another of the second electrical connectors, a second detection channel is formed.

[0033] The number of the first detection channels is the same as the number of the cells under test, and the number of the second detection channels is the same as the number of the cells under test.

[0034] In this embodiment, the insulation testing device, through the coordinated operation of the insulation testing mechanism and the restraint tray, enables the testing of the insulation performance of the battery cell. The restraint tray securely holds the battery cell under test within the accommodating space, reducing cell movement or shaking during the formation and capacity testing process, thus improving the accuracy and stability of the test. The first electrical connector of the insulation testing mechanism contacts the outer casing of the battery cell under test, while the second electrical connector contacts a metal component near either side of the battery cell. This facilitates the rapid and accurate measurement of the resistance or current between the battery cell casing and the metal component, efficiently determining the insulation performance of the battery cell. This helps in the timely detection of insulation defects, improving production efficiency and product quality. During the formation and capacity testing process, insulation testing can be performed in real time, allowing for the timely acquisition of relevant data on the battery cell's insulation performance. This data can be fed back to operators or the automated control system for adjustments and optimization of the formation and capacity testing process, ensuring that external foreign object contact and other potential short-circuit problems can be detected and resolved promptly during the process. Attached Figure Description

[0035] 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:

[0036] Figure 1 This is a frontal projection view of a battery cell insulation testing device provided in an embodiment of this application;

[0037] Figure 2 yes Figure 1 A schematic diagram of the restraint tray structure of the battery cell insulation testing device;

[0038] Figure 3 This is a schematic diagram of the metal parts, insulating parts, and the battery cell under test in the embodiments of this application;

[0039] Figure 4 yes Figure 1A schematic diagram of the restraint tray structure of the battery cell insulation testing device;

[0040] Figure 5 This is a schematic diagram of an insulation test in one embodiment of this application;

[0041] Figure 6 This is a schematic diagram of an electrical connector bracket in one embodiment of this application;

[0042] Figure 7 This is a schematic diagram illustrating the working principle of the channel switching board in one embodiment of this application.

[0043] Explanation of reference numerals in the attached figures:

[0044] Restraint tray-10, bracket-101, insulating component-102, limiting block-1021, metal component-103, limiting groove-1031, protrusion-1032, limiting part-10321, insulation testing mechanism-20, tester-201, first electrical connector-202, second electrical connector-203, channel switching plate-204, output interface-2041, connection interface-2042, first connection interface-2042a, second connection interface-2042b, cell under test-30, mounting bracket-40, first drive mechanism-50, second drive mechanism-60, electrical connector bracket-70. Detailed Implementation

[0045] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0046] The terms "first," "second," etc., used in the specification and claims of this utility model are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, the first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0047] The battery cell insulation testing device provided by the present invention will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0048] During the cell formation and capacity testing process, the cells need to be fixed. During cell formation, the cells expand. To resist the deformation of the cells, the restraint tray needs to have a certain supporting strength. For this purpose, insulating parts 102 are provided on opposite sides of the cells. A metal part 103 is provided on the side of the insulating part 102 away from the cells to improve the supporting strength. During series capacity testing, the cell casing becomes energized. If foreign objects or oil stains are attached between the metal part 103 and the cell casing, it will cause a short circuit between the metal part 103 and the cell casing, resulting in smoke or even fire. To solve the above technical problems, this application provides the following technical solution.

[0049] Example 1

[0050] See Figure 1 This application provides a battery cell insulation testing device, including a restraint tray 10 and an insulation testing mechanism 20. The restraint tray 10 includes a support 101 and an insulating member 102 and a metal member 103 disposed between the support. Adjacent insulating members 102 are spaced apart to form an accommodating space for placing the battery cell under test. The metal member 103 is located on the side of the insulating member 102 away from the accommodating space. The insulation testing mechanism includes a tester 201 and a first electrical connector 202 and a second electrical connector 203 electrically connected to the tester 201. The first electrical connector 202 is used to contact the outer shell of the battery cell 30 under test, and the second electrical connector 203 is used to contact the metal member 103 near any side of the battery cell 30 under test, for measuring the resistance or current between the outer shell of the battery cell under test and the metal member 103.

[0051] The restraint tray 10 can accurately position the battery cell 30 under test, firmly securing it within the accommodating space, reducing cell movement or shaking during the formation and capacity testing process, and improving the accuracy and stability of the test. Understandably, the coordinated arrangement of the insulating component 102 and the metal component 103 enhances the support strength of the battery cell during the formation and capacity testing process.

[0052] The insulation testing mechanism uses a first electrical connector 202 to contact the outer shell of the battery cell 30 under test, and a second electrical connector 203 to contact the metal part 103 near any side of the battery cell 30 under test. This allows for the rapid and accurate measurement of the resistance or current between the battery cell outer shell 30 and the metal part 103, thereby efficiently determining whether the insulation performance of the battery cell is good. This helps to detect insulation defects in a timely manner and improve production efficiency and product quality.

[0053] During the formation and capacity testing process, insulation tests can be performed in real time to obtain relevant data on the insulation performance of the cells. This data can be fed back to operators or automated control systems to adjust and optimize the formation and capacity testing process, ensuring the reliability of the entire process and reducing risks and quality accidents caused by cell insulation problems.

[0054] Furthermore, the aforementioned cell insulation testing device is designed to be suitable for various types and specifications of cells. By adjusting the structure of the restraint tray or replacing some components, it can adapt to the insulation testing of cells of different sizes and models, exhibiting good compatibility and versatility. It can meet diverse production needs and reduce redundant investment in equipment.

[0055] Example 2

[0056] Embodiment 2 of this application is a further improvement on the cell insulation testing device in Embodiment 1 of this application. (See reference...) Figure 1 The cell insulation testing device in Embodiment 2 of this application further includes a mounting frame 40 and a first driving mechanism 50 disposed on the mounting frame 40; the first driving mechanism 50 is connected to the first electrical connector 202 and the second electrical connector 203 to drive the first electrical connector 202 and the second electrical connector 203 to move toward the restraint tray 10 so as to contact the outer shell and the metal part 103 of the cell 30 to be tested.

[0057] The first drive mechanism 50 can automatically drive the first electrical connector 202 and the second electrical connector 203 to move toward the restraint tray 10, that is... Figure 1 The movement in the Z direction shown in the figure automates the contact between the electrical connector and the battery cell 30 and the metal part 103 during the test, reducing the tedious steps of manual operation, improving test efficiency, and also reducing test errors caused by inconsistent manual operation, making the test results more stable and accurate.

[0058] The first drive mechanism 50 can also precisely control the movement stroke and pressure of the first electrical connector 202 and the second electrical connector 203, ensuring that they can accurately contact the casing or metal part 103 of the battery cell 30 under test, and that the contact force is moderate. This ensures a good electrical connection to obtain accurate test data, while preventing damage to the battery cell or metal part due to excessive force, thus improving the reliability of the test and the safety of the product.

[0059] By adjusting the parameters or program of the first drive mechanism 50, the testing requirements of different specifications and types of battery cells can be met. For example, for battery cells of different sizes, the movement distance of the electrical connectors can be adjusted; for battery cells with different hardness or surface properties, the contact pressure can be adjusted, making the device more versatile and adaptable, and able to meet the requirements of various production scenarios.

[0060] Meanwhile, the automated driving process saves manual operation time, enabling rapid insulation testing of multiple cells during the formation and capacity testing process. This reduces the testing cycle of individual cells, thereby improving overall production efficiency and helping companies reduce production costs and enhance market competitiveness.

[0061] The first drive mechanism 50 can be a pneumatic cylinder, a hydraulic cylinder, an electric push rod, etc., and this application embodiment does not make specific limitations.

[0062] Example 3

[0063] Embodiment 3 of this application is a further improvement on the cell insulation testing device in Embodiment 2 of this application. (See reference...) Figure 6 The cell insulation testing device also includes at least one electrical connector bracket 70, which is connected to the first drive mechanism 50. The first electrical connector 202 and the second electrical connector 203 are disposed on the electrical connector bracket 70 so that the first drive mechanism 50 drives the electrical connector bracket 70 to move toward the restraint tray 10 so that the first electrical connector 202 and the second electrical connector 203 abut against the outer shell and the metal part 103 of the cell 30 to be tested.

[0064] The electrical connector bracket 70 connects to the first drive mechanism 50, ensuring the synchronicity of the first electrical connector 202 and the second electrical connector 203 during movement. They can move towards the restraint tray simultaneously and at the same speed, and abut against the housing of the battery cell 30 and the metal part 103 under test with the same pressure, ensuring the consistency of test conditions and improving the accuracy and reliability of test results.

[0065] The electrical connector bracket 70 provides stable support for the first electrical connector 202 and the second electrical connector 203, enhancing the stability of the entire testing system. Driven by the first drive mechanism 50, the electrical connector bracket 70 can reliably transmit driving force, enabling the electrical connectors to accurately reach the predetermined positions, reducing the impact of unstable factors such as shaking and offset on the test results, reducing test errors, and improving test repeatability.

[0066] Furthermore, this structural design facilitates the installation and removal of electrical connectors. The first electrical connector 202 and the second electrical connector 203 are mounted on an electrical connector bracket, which is connected to the first drive mechanism 50. This makes the structure of the entire electrical connection system clear and facilitates calibration and adjustment during installation. When maintaining or replacing electrical connectors, the bracket can also be easily removed from the drive mechanism for corresponding maintenance operations, improving equipment maintainability, reducing downtime, and lowering maintenance costs.

[0067] The electrical connector bracket 70 optimizes the spatial layout of the entire testing setup. Based on the structural characteristics of the restraint tray 10 and the battery cell 30 under test, the electrical connectors are installed in appropriate positions on the bracket, enabling them to accurately contact the battery cell 30 and the metal part 103 during movement, while avoiding interference with other components and effectively utilizing space.

[0068] Example 4

[0069] Embodiment 4 of this application is a further improvement on the cell insulation testing device in Embodiment 2 of this application. (See reference...) Figure 4 The cell insulation testing device also includes a second drive mechanism 60, which is mounted on the mounting frame 40. The second drive mechanism 60 is connected to the restraint tray 10 and is used to drive the restraint tray 10 toward the first electrical connector 202 and the second electrical connector 203 so that the outer shell and metal part 103 of the cell under test 30 come into contact with the first electrical connector 202 and the second electrical connector 203.

[0070] The second drive mechanism 60 can precisely control the position of the restraint tray 10, and the second drive mechanism 60 can drive the restraint tray 10 to move as follows: Figure 1 The Z-direction movement shown allows the test cell 30 in different positions to accurately contact the first electrical connector 202 and the second electrical connector 203, improving the adaptability of the testing device to cells of different specifications and placement positions, and increasing the versatility of the device.

[0071] The second drive mechanism 60 drives the restraint tray 10 to move as a whole, so that multiple cells under test 30 can contact the electrical connectors for testing in sequence and quickly, without having to adjust the position of the electrical connectors one by one, reducing the auxiliary time of testing and thus improving the overall testing efficiency, which is especially suitable for batch testing scenarios.

[0072] The second drive mechanism 60 drives the restraint tray 10 to move smoothly. The action of bringing the battery cell into contact with the electrical connector is completed by the restraint tray 10. The electrical connector does not need to bear excessive pressure and impact, which reduces the load on the electrical connector, helps to extend its service life, and reduces maintenance costs and downtime caused by damage to the electrical connector.

[0073] The second drive mechanism 60 drives the restraint tray 10 to move smoothly, so that the battery cell 30 under test can contact the electrical connector in a relatively stable state, reducing the fluctuation of test data caused by battery cell shaking or sudden collision, and improving the stability and accuracy of test results.

[0074] The second drive mechanism 60 can be a pneumatic cylinder, a hydraulic cylinder, an electric push rod, etc., and this application embodiment does not make specific limitations.

[0075] Example 5

[0076] Embodiment 5 of this application is a further improvement on the cell insulation testing device in Embodiment 3 of this application. See also Figure 1The cell insulation testing device also includes a third drive mechanism, which is located on the mounting frame 40. The electrical connector bracket 70 is connected to the third drive mechanism and is used to drive the electrical connector bracket 70 to translate along the bearing plane of the restraint tray 10 through the third drive mechanism, so that the first electrical connector 202 contacts the outer shell of the cell 30 under test at different positions.

[0077] The third drive mechanism can drive the electrical connection assembly to translate within the bearing plane of the restraint tray 10, that is... Figure 1 The in-plane movement of the vertical XZ plane shown allows the first electrical connector 202 to sequentially contact the outer shell of the battery cell 30 under test at different positions, eliminating the need for manual adjustment or rearrangement of the battery cell positions. This is suitable for scenarios where multiple battery cells are subjected to insulation testing simultaneously, improving testing efficiency and convenience.

[0078] By precisely controlling the translation of the electrical connector bracket 70 through the third drive mechanism, it can be ensured that the contact position between the first electrical connector 202 and the outer shell of each battery cell 30 under test is accurate and consistent, reducing contact position deviations caused by human factors, thereby improving the accuracy and reliability of the test results.

[0079] It also enables the testing device to adapt to battery cells with different arrangements and spacings. By simply adjusting the position of the electrical connector bracket 70 through the third drive mechanism, it is possible to test battery cells with various layouts, thus expanding the applicability of the equipment and reducing the cost of replacing the equipment due to changes in battery cell specifications or arrangements.

[0080] This translational movement method can be combined with other testing steps or mechanisms to form an automated testing process. For example, after completing the test of one battery cell, the third drive mechanism moves the electrical connector bracket 70 to the position of the next battery cell, and then the next test is performed. The entire process does not require manual intervention, which improves the automation level of testing, reduces manpower input, and also reduces the errors and risks caused by human operation.

[0081] Example 6

[0082] Embodiment Six of this application is a further improvement of the cell insulation testing device in Embodiment Four of this application. The cell insulation testing device also includes a lifting platform; the lifting platform is disposed on the mounting frame 40, the restraint tray 10 is disposed on the lifting platform, the second drive mechanism 60 is disposed on the mounting frame 40 and drivenly connected to the restraint tray 10, the second drive mechanism 60 and the lifting platform are located on the same side of the restraint tray 10; the first drive mechanism 50 is disposed on the mounting frame 40 and located on the side of the restraint tray 10 away from the second drive mechanism 60, the first drive mechanism 50 is connected to a first electrical connector 202 and a second electrical connector 203 on the side of the first drive mechanism 50 near the restraint tray 10, the first drive mechanism 50 is used to drive the first electrical connector 202 and the second electrical connector 203 to move toward the restraint tray 10.

[0083] The second drive mechanism 60 lifts the restraint tray via the lifting platform, bringing the battery cell 30 under test closer to the first electrical connector 202 and the second electrical connector 203. At the same time, the first drive mechanism 50 drives the electrical connector to move toward the restraint tray 10. The two work together to quickly achieve contact between the electrical connector and the battery cell under test, improving testing efficiency.

[0084] The lifting platform provides stable support for the restraint tray 10, ensuring the positional accuracy of the cell under test 30 during the testing process. The layout of the second drive mechanism 60 and the lifting platform on the same side, and the first drive mechanism 50 on the other side, makes the force transmission more uniform, reduces the shaking and displacement of the cell during the testing process, provides a stable testing environment, and helps to improve the accuracy and reliability of the test results.

[0085] The first drive mechanism 50 and the second drive mechanism 60 are respectively set up, which can flexibly adjust the relative position between the electrical connector and the battery cell according to different battery cell sizes, shapes and testing requirements. For example, for thicker or thinner battery cells, the lifting height of the restraint tray 10 can be precisely controlled by the second drive mechanism 60, and the position of the electrical connector can be finely adjusted by the first drive mechanism 50 to ensure good contact between the electrical connector and the battery cell. The various components are reasonably arranged on the mounting frame 40, making full use of space and making the entire testing device compact. This layout not only saves space, but also facilitates the integration and miniaturization of the equipment, and is convenient for installation, debugging and maintenance.

[0086] This dual-sided drive structure design ensures smoother contact between the electrical connectors and the battery cells during testing, avoiding problems such as battery cell damage or electrical connector deformation caused by excessive force on one side. This improves the safety and reliability of the testing operation and also extends the service life of the equipment.

[0087] Example 7

[0088] Embodiment 7 of this application is a further improvement on the cell insulation testing device described in Embodiments 1 to 6 of this application. See also Figure 3 The surface of the metal part 103 facing the insulating part 102 is a limiting surface. The metal part 103 has a limiting groove 1031 on the limiting surface. The surface of the insulating part 102 facing the limiting surface is provided with a limiting block 1021 that is adapted to the limiting groove 1031. The opposite ends of the metal part 103 are provided with protrusions 1032 facing the limiting surface. The protrusions 1032 are provided with a limiting part 10321 on the side away from the insulating part 102. The limiting part 10321 is parallel to the limiting surface. The protrusions 1032 and the limiting surface are used to cover the edge of the insulating part 102.

[0089] The cooperation between the limiting groove 1031 and the limiting block 1021 enables precise positioning between the metal part and the insulating part. During assembly, the limiting block 1021 can accurately embed into the limiting groove 1031, ensuring the positional accuracy of the insulating part 102 relative to the metal part 103, which helps to improve assembly efficiency and quality and ensure product consistency.

[0090] The protrusion 1032 and the limiting portion 10321 covering the edge of the insulating member 102 make the connection between the insulating member 102 and the metal member 103 more stable, enhance the stability of the overall structure, and help improve the reliability of the product during use. The protrusion and limiting portion covering the edge of the insulating member 102 prevents the edge of the insulating member 102 from being directly exposed, reducing the risk of insulation performance degradation due to external factors, thus better fulfilling the insulating function of the insulating member.

[0091] Example 8

[0092] Embodiment 8 of this application is a further improvement on the cell insulation testing device described in Embodiments 1 to 6 of this application. See also Figure 5 The insulation testing mechanism also includes a channel switching plate 204, which has an output interface 2041 and at least two acquisition interfaces 2042. The channel switching plate 204 is used to electrically connect to the tester 201 through the output interface 2041. At least one acquisition interface 2042 is used to electrically connect to one end of the first electrical connector 202, and the other end of the first electrical connector 202 is used to abut against the outer shell of the battery cell 30 under test. At least another acquisition interface 2042 is used to electrically connect to one end of the second electrical connector 203, and the other end of the second electrical connector 203 is used to abut against the metal part 103.

[0093] The channel switching board 204 has multiple acquisition interfaces 2042, which can be connected to the first electrical connector 202 and the second electrical connector 203 respectively. Through its internal circuit switching function, it can realize insulation testing of different connection paths between the shell of the battery cell under test and the metal parts, thus meeting diverse testing needs.

[0094] The channel switching board 204 eliminates the need for operators to manually change test lines or connection points. By quickly switching between different test points using the channel switching board 204, testing time is greatly saved and testing efficiency is improved, making it particularly suitable for batch testing scenarios.

[0095] The channel switching board 204 is electrically connected to the tester 201, enabling it to accurately transmit the acquired cell numbers to the tester 201 for analysis and processing. Simultaneously, its stable electrical connection and signal transmission performance help reduce signal interference and transmission errors, thereby ensuring the accuracy and reliability of the test results. Integrating multiple acquisition interfaces onto the channel switching board 204 simplifies the wiring connections of the testing system, reduces cluttered wiring, lowers system complexity and the probability of failure, and facilitates installation, debugging, and maintenance.

[0096] The design of the channel switching board 204 facilitates the expansion of the test system. If it is necessary to add test points or test items, simply add the corresponding acquisition interface to the channel switching board 204 and perform appropriate software configuration to easily expand the system without requiring large-scale modifications to the entire test system.

[0097] Example 9

[0098] Embodiment 9 of this application is a further improvement on the cell insulation testing device in Embodiment 8 of this application. See also Figure 5 The number of first electrical connectors 202 is at least one, and the number of second electrical connectors 203 is at least two; the acquisition interface 2042 includes at least one first acquisition interface 2042a and at least two second acquisition interfaces 2042b, the first acquisition interface 2042a is used to electrically connect with the first electrical connector 202, and the second acquisition interface 2042b is used to electrically connect with the second electrical connectors 203; when the first electrical connector 202 abuts against the outer shell of the battery cell 30 under test, and one of the second electrical connectors 203 abuts against the metal part 103 on one side of the battery cell 30 under test, a first detection channel is formed; when the first electrical connector 202 abuts against the outer shell of the battery cell 30 under test, and another second electrical connector 203 abuts against the metal part 103 on the other side of the battery cell 30 under test, a second detection channel is formed; the channel switching plate 204 is used to switch between the first detection channel and the second detection channel.

[0099] A first detection channel is formed when the first electrical connector 202 abuts against the outer casing of the battery cell 30 under test, and when one second electrical connector 203 abuts against the metal part 103 on one side of the battery cell 30 under test; a second detection channel is formed when the first electrical connector 202 abuts against the outer casing of the battery cell 30 under test, and the other second electrical connector 203 abuts against the metal part 103 on the other side of the battery cell 30 under test. This allows for the detection of insulation conditions at different locations within the battery cell. The first detection channel detects the insulation performance between the metal part 103 on one side of the battery cell 30 under test and the outer casing, while the second detection channel detects the insulation performance between the metal part 103 on the other side and the outer casing, thereby achieving a comprehensive assessment of the insulation performance of the entire battery cell under test and promptly identifying any potential insulation defects.

[0100] The channel switching board 204 can freely switch between two detection channels, allowing different channels to be selected for testing according to actual testing needs. For example, for certain types of cells, it may be necessary to focus on the insulation performance of a certain side, or if it is found during the production process that a certain side is more prone to insulation problems, the corresponding channel can be selected for frequent testing, improving the flexibility and targeting of the test.

[0101] When an insulation fault is detected, the channel switching board 204 determines which channel is malfunctioning, which helps to quickly locate the fault. If the fault is in the first detection channel, the insulation of the metal parts, electrical connections, and related circuits on the side of the cell under test can be checked. If the fault is in the second detection channel, the focus of the check can be placed on the other side, providing a strong basis for fault analysis and repair, and shortening the troubleshooting time.

[0102] Different types of battery cells may differ in structure, size, or electrode layout. This multi-channel design can adapt to the insulation testing needs of various battery cells. By rationally configuring the positions of the first electrical connector 202 and the second electrical connector 203, as well as the parameters of the channel switching plate 204, the insulation performance testing of battery cells with different shapes and electrode distributions can be met, improving the versatility and compatibility of the testing equipment.

[0103] Example 10

[0104] Embodiment 10 of this application is a further improvement on the cell insulation testing device in Embodiment 8 of this application. The channel switching board in Embodiment 10 includes a first channel module and a second channel module; the first channel module includes a first switching interface, a first acquisition interface, and a second acquisition interface, the first acquisition interface being electrically connected to a first electrical connector, and the second acquisition interface being electrically connected to a second electrical connector; the second channel module includes a second switching interface and another second acquisition interface, the other second acquisition interface being electrically connected to another second electrical connector; the first channel module and the second channel module are electrically connected through the first switching interface and the second switching interface to control the switching between the first detection channel and the second detection channel.

[0105] By setting independent switching interfaces for the first and second channel modules and electrically connecting them, the switching between the first and second detection channels can be precisely controlled. This design ensures accurate transmission of the cell number during switching, avoiding problems such as incorrect switching or signal interference, and guaranteeing the stability and reliability of detection channel switching.

[0106] The modular design divides the channel switching board into a first-channel module and a second-channel module, each with clearly defined functions and interfaces. This allows for easy location and replacement of faulty modules during equipment maintenance, reducing maintenance costs and complexity. Furthermore, the modular design facilitates system expansion. If new testing channels or functions are needed in the future, expansion can be performed on existing modules without requiring a large-scale redesign of the entire system. This enables the system to meet diverse testing needs and improves its adaptability and flexibility.

[0107] Integrating different acquisition and switching interfaces into different modules, and then achieving overall functionality through electrical connections between modules, helps improve the system integration of the channel switching board. This reduces the complexity of external wiring connections, making the entire testing system more compact and rationally laid out, which is beneficial for improving equipment stability and reliability, while also facilitating equipment installation and debugging.

[0108] Example 11

[0109] This embodiment eleven is a further improvement of the battery cell insulation testing device in embodiment eight of this application. In embodiment eleven, the battery cells 30 to be tested are arranged in an M-row * N-column array on the restraint tray 10, where M ≥ 1 and N ≥ 1; there are M * N first electrical connectors 202; in each row, there are N first electrical connectors 202, each first electrical connector 202 is arranged in a one-to-one correspondence with each battery cell 30 to be tested; there are N+1 second electrical connectors 203, arranged alternately with the first electrical connectors 202; in each row, the acquisition interface includes N first acquisition interfaces 2042a and N+1 second acquisition interfaces 2042b, the first acquisition interfaces 2042a being used to connect to the first... Electrical connector 202 is electrically connected, and second acquisition interface 2042b is used to electrically connect with second electrical connector 203; the outer shell of any battery cell 30 under test is used to abut against a first electrical connector 202, and when the metal part 103 on any side of the battery cell 30 under test abuts against a second electrical connector 203, a first detection channel is formed; when the metal part 103 on the other side of the battery cell 30 under test abuts against another second electrical connector 203, a second detection channel is formed; the number of first detection channels is the same as the number of battery cells 30 under test, and the number of second detection channels is the same as the number of battery cells 30 under test.

[0110] By setting up a first detection channel and a second detection channel, the same number of cells as those to be tested, different parts of each cell can be tested separately. Specifically, by having the cell casing abut against the first electrical connector, and the metal parts on both sides of the cell abut against different second electrical connectors, two different detection channels are formed, enabling comprehensive electrical performance testing of each cell. This helps to more thoroughly identify potential insulation problems or other electrical faults in the cells.

[0111] The first and second electrical connectors are arranged one-to-one with the battery cells under test, and the acquisition interface is also electrically connected to the electrical connectors one-to-one. This precise correspondence ensures that the test data of each battery cell can be accurately collected and transmitted to the corresponding test unit for processing and analysis, avoiding signal interference and data confusion between different battery cells, and improving the accuracy and reliability of the test results.

[0112] The arrangement of electrical connectors and the configuration of the data acquisition interfaces allow for flexible selection of testing channels based on actual needs during the testing process. For different types or specifications of battery cells, as long as they are installed and connected according to the corresponding arrangement, it is easy to switch between the first and second testing channels to adapt to the testing requirements of various battery cells, demonstrating strong versatility and adaptability.

[0113] The layout of multiple electrical connectors and acquisition interfaces in each row allows for the simultaneous testing of multiple cells under test, improving testing efficiency. This is especially suitable for scenarios requiring rapid testing of a large number of cells on large-scale production lines, helping to shorten production cycles and improve production efficiency.

[0114] Since each battery cell has its own independent detection channel and electrical connectors, when a problem is detected in a battery cell, it is possible to quickly and accurately determine which battery cell is faulty and the possible location of the fault based on its corresponding channel and connection. This facilitates timely repair and handling, reducing the difficulty and time cost of troubleshooting.

[0115] Example 12

[0116] Embodiment 12 of this application is a further improvement of the cell insulation testing device in Embodiment 11 of this application. The channel switching board in Embodiment 12 includes test units and a controller. The number of test units is the same as the number of cells under test. Each test unit is electrically connected to the controller. Each test unit includes a first channel module and a second channel module. The first channel module includes a first switching interface, a first acquisition interface, and a second acquisition interface. The first acquisition interface is electrically connected to a first electrical connector, and the second acquisition interface is electrically connected to a second electrical connector. The second channel module includes a second switching interface and another second acquisition interface, which is electrically connected to another second electrical connector. The first channel module and the second channel module are electrically connected through the first and second switching interfaces to control the switching between the first detection channel and the second detection channel. The controller is used to trigger the activation of one of the multiple test units to control the switching between the multiple first detection channels and / or the multiple second detection channels.

[0117] Each battery cell under test has a corresponding test unit, and each test unit contains a first channel module and a second channel module that can be switched between a first detection channel and a second detection channel. This allows for the precise selection of different detection channels for each battery cell, and flexible switching based on the specific conditions of the battery cell and testing requirements to achieve accurate testing of different parts or parameters of the battery cell.

[0118] The controller can trigger the activation of one of multiple test units, enabling unified management and switching control of the testing channels for multiple cells under test. Different cells can be tested sequentially according to a set order or specific requirements, improving testing efficiency and facilitating simultaneous batch testing and management of multiple cells. It is suitable for cell insulation testing on large-scale production lines.

[0119] By centrally controlling the channel switching of multiple test units with a controller, manual operation of the testing channel switching for each individual cell is eliminated, significantly saving testing time and improving overall testing efficiency. At the same time, this automated switching method reduces the possibility of human error, ensuring the accuracy and consistency of test results.

[0120] The controller can be flexibly configured to trigger different test units in a specific order and at what time, and multiple first detection channels, multiple second detection channels, or a combination of both can be selected, depending on the actual testing requirements. This flexibility allows the testing system to adapt to the testing requirements of different types and specifications of battery cells, exhibiting strong versatility and adaptability.

[0121] Since each battery cell has an independent testing unit, when a problem occurs during the testing of a particular cell, the corresponding testing unit can be quickly located, facilitating fault diagnosis and troubleshooting. Simultaneously, observing the channel switching and test results of different testing units helps analyze the overall operating status of the testing system and promptly identify potential faults.

[0122] Example 13

[0123] Embodiment thirteen of this application is a further improvement on the cell insulation testing device in Embodiment twelf of this application. In the cell insulation testing device of Embodiment thirteen of this application, the first channel module and the second channel module are electrically connected via a CAN bus.

[0124] The CAN bus boasts high data transmission rates and reliability, enabling fast and accurate transmission of control signals and data between the first and second channel modules. This ensures stable communication between the two modules, reduces the possibility of data transmission errors and loss, and thus guarantees the timeliness and accuracy of channel switching detection.

[0125] The CAN bus supports a multi-master communication mode, meaning that both the first and second channel modules can initiate communication as master nodes without relying on a specific master-slave architecture. This feature ensures that the two modules have equal status during communication, enabling flexible data exchange and control command transmission according to actual needs, thus improving the system's flexibility and autonomy.

[0126] The CAN bus uses differential signal transmission, which has strong resistance to electromagnetic interference. In actual battery cell insulation testing environments, various electromagnetic interference sources may exist. Using the CAN bus can effectively reduce the impact of these interferences on communication signals, ensuring that communication between modules is not affected by external interference, and improving the stability and reliability of the system.

[0127] The CAN bus has a simple network structure and is easy to expand. If new channel modules or other related devices need to be added in the future, they can be easily connected to the CAN bus without requiring large-scale modifications to the existing system. Furthermore, due to the high degree of standardization of the CAN bus and the maturity of related equipment and technologies, fault diagnosis and repair are easier during system maintenance.

[0128] For operations with high real-time requirements, such as channel switching, in battery cell insulation testing, the CAN bus can meet the needs of real-time communication. It can quickly respond to communication requests between modules, ensuring that operations such as channel switching are completed in a short time, thereby improving the real-time performance of the entire testing system and enabling timely and accurate completion of insulation tests on different parts of the battery cell.

[0129] Example 14

[0130] Embodiment Fourteen of this application is a further improvement on the cell insulation testing device in Embodiments Ten to Thirteen of this application. The cell insulation testing mechanism in Embodiment Fourteen of this application also includes an interface conversion module; the testing unit is provided with an RS485 interface, the controller is provided with a USB interface, one end of the interface conversion module is electrically connected to the RS485 interface, and the other end is electrically connected to the USB interface.

[0131] RS485 and USB interfaces use different communication protocols and electrical characteristics. The interface conversion module can convert the RS485 signal of the test unit into a USB signal that the controller can recognize, and vice versa, enabling devices with two different interface types to communicate and interact effectively. This solves the problem of the test unit and the controller being unable to communicate directly due to interface incompatibility.

[0132] The interface conversion module connects test units and controllers with different interfaces, forming a complete system for the entire cell insulation testing mechanism. This helps improve system integration, reduce the complexity of external equipment, and facilitates centralized control and management of the entire testing process by operators.

[0133] The testing unit transmits the acquired cell insulation test data to the interface conversion module via an RS485 interface. The interface conversion module then converts the data into a USB signal and transmits it to the controller. This facilitates the transmission of test data to the controller for processing, analysis, storage, and display, allowing operators to obtain test results promptly and evaluate and judge the insulation performance of the cells.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery cell insulation testing device, characterized in that, include: A restraint tray (10) includes a support (101) and an insulating member (102) and a metal member (103) disposed between the support. Two adjacent insulating members (102) are spaced apart to form a receiving space for placing the battery cell to be tested between them. The metal member (103) is located on the side of the insulating member (102) away from the receiving space. An insulation testing mechanism (20) is provided, comprising a tester (201) and a first electrical connector (202) and a second electrical connector (203) electrically connected to the tester (201). The first electrical connector (202) is used to contact the outer casing of the battery cell (30) under test, and the second electrical connector (203) is used to contact the metal part (103) near any side of the battery cell (30) under test, for measuring the resistance or current between the outer casing of the battery cell under test and the metal part (103).

2. The cell insulation testing device according to claim 1, characterized in that, The cell insulation testing device further includes a mounting frame (40) and a first drive mechanism (50) disposed on the mounting frame (40); The first drive mechanism (50) is connected to the first electrical connector (202) and the second electrical connector (203) to drive the first electrical connector (202) and the second electrical connector (203) to move toward the restraint tray (10) to contact the outer shell of the battery cell (30) under test and the metal part (103).

3. The cell insulation testing device according to claim 2, characterized in that, The cell insulation testing device further includes at least one electrical connector bracket (70), which is connected to the first drive mechanism (50). The first electrical connector (202) and the second electrical connector (203) are disposed on the electrical connector bracket (70) so that the electrical connector bracket (70) is driven by the first drive mechanism (50) to move toward the restraint tray (10) so that the first electrical connector (202) and the second electrical connector (203) abut against the outer shell of the cell under test (30) and the metal part (103).

4. The cell insulation testing device according to claim 2, characterized in that, The cell insulation testing device further includes a second drive mechanism (60), which is disposed on the mounting frame (40); The second drive mechanism (60) is connected to the restraint tray (10) to drive the restraint tray (10) toward the first electrical connector (202) and the second electrical connector (203) so that the outer shell of the battery cell (30) under test and the metal part (103) come into contact with the first electrical connector (202) and the second electrical connector (203).

5. The cell insulation testing device according to claim 3, characterized in that, The cell insulation testing device further includes a third driving mechanism, which is located on the mounting frame (40); The electrical connector bracket (70) is connected to the third drive mechanism to drive the electrical connector bracket (70) to translate along the bearing plane of the restraint tray (10) through the third drive mechanism, so that the first electrical connector (202) contacts the outer shell of the battery cell (30) under test at different positions.

6. The cell insulation testing device according to claim 4, characterized in that, The cell insulation testing device also includes a lifting platform; The lifting platform is located on the mounting frame (40), the restraint tray (10) is located on the lifting platform, the second drive mechanism (60) is located on the mounting frame (40) and is driven to the restraint tray (10), and the second drive mechanism (60) and the lifting platform are located on the same side of the restraint tray (10); The first drive mechanism (50) is disposed on the mounting bracket (40) and located on the side of the restraint tray (10) away from the second drive mechanism (60). The first drive mechanism (50) is connected to the first electrical connector (202) and the second electrical connector (203) on the side close to the restraint tray (10). The first drive mechanism (50) is used to drive the first electrical connector (202) and the second electrical connector (203) to move toward the restraint tray (10).

7. The cell insulation testing apparatus according to any one of claims 1 to 6, characterized in that, The side surface of the metal part (103) facing the insulating part (102) is a limiting surface. The metal part (103) has a limiting groove (1031) on the limiting surface. The side surface of the insulating part (102) facing the limiting surface is provided with a limiting block (1021) adapted to the limiting groove (1031). The metal part (103) has protrusions (1032) at its opposite ends facing the limiting surface. The protrusions (1032) have limiting portions (10321) on the side away from the insulating part (102). The limiting portions (10321) are parallel to the limiting surface. The protrusions (1032) and the limiting surface are used to cover the edge of the insulating part (102).

8. The cell insulation testing apparatus according to any one of claims 1 to 6, characterized in that, The insulation testing mechanism also includes a channel switching board (204), which has an output interface (2041) and at least two acquisition interfaces (2042); The channel switching board (204) is used to be electrically connected to the tester (201) through the output interface (2041); At least one of the acquisition interfaces (2042) is used to be electrically connected to one end of the first electrical connector (202), and the other end of the first electrical connector (202) is used to abut against the outer shell of the battery cell (30) under test; At least one of the acquisition interfaces (2042) is used to be electrically connected to one end of the second electrical connector (203), and the other end of the second electrical connector (203) is used to abut against the metal part (103).

9. The cell insulation testing device according to claim 8, characterized in that, The number of the first electrical connector (202) is at least one, and the number of the second electrical connector (203) is at least two; The acquisition interface (2042) includes at least one first acquisition interface (2042a) and at least two second acquisition interfaces (2042b). The first acquisition interface (2042a) is used to be electrically connected to the first electrical connector (202), and the second acquisition interface (2042b) is used to be electrically connected to the second electrical connector (203). When the first electrical connector (202) abuts against the outer shell of the battery cell (30) under test, and a second electrical connector (203) abuts against the metal part (103) on one side of the battery cell (30) under test, a first detection channel is formed; When the first electrical connector (202) abuts against the outer shell of the battery cell (30) under test, and the other second electrical connector (203) abuts against the metal part (103) on the other side of the battery cell (30) under test, a second detection channel is formed; The channel switching board (204) is used to switch between the first detection channel and the second detection channel.

10. The cell insulation testing device according to claim 8, characterized in that, The battery cell (30) to be tested is arranged in an M-row * N-column array on the restraint tray (10), where M≥1 and N≥1; The number of the first electrical connectors (202) is M*N; in each row, the number of the first electrical connectors (202) is N, and each of the first electrical connectors (202) is arranged in a one-to-one correspondence with each of the tested battery cells (30); the number of the second electrical connectors (203) is N+1, and they are arranged at intervals from the first electrical connectors (202); In each row, the acquisition interface includes N first acquisition interfaces (2042a) and N+1 second acquisition interfaces (2042b), the first acquisition interface (2042a) is used to be electrically connected to the first electrical connector (202), and the second acquisition interface (2042b) is used to be electrically connected to the second electrical connector (203); The outer casing of any of the battery cells (30) under test is used to abut against one of the first electrical connectors (202). When the metal part (103) on one side of the battery cell (30) under test is used to abut against one of the second electrical connectors (203), a first detection channel is formed. When the metal part (103) on the other side of the battery cell (30) under test is used to abut against another of the second electrical connectors (203), a second detection channel is formed. The number of the first detection channels is the same as the number of the cells under test (30), and the number of the second detection channels is the same as the number of the cells under test (30).

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