Battery ocv test fixture and test equipment

Abstract

The utility model relates to battery test technical field, specifically disclose battery OCV test frock and test equipment. The test frock includes support unit, lifting assembly and test unit, support unit includes the bearing plate and sets up the limiting unit on the bearing plate, and the bearing plate is used for bearing battery, and limiting unit can limit the position of battery on the bearing plate, lifting assembly sets up in one side of support unit, test unit is connected in lifting assembly, and can be driven under the lifting assembly and approaches support unit along Z axle direction, so that test unit can contact the positive pole and negative pole of battery. The test frock is through the optimization design of joint structure, can ensure test accuracy and stability.

Description

Technical Field

[0001] This utility model relates to the field of battery testing technology, and in particular to battery OCV testing fixtures and testing equipment. Background Technology

[0002] In the battery production and quality inspection process, the battery OCV (Open Circuit Voltage) test is a crucial step. This test is usually carried out before the battery cells are packaged or assembled into modules to screen out products with abnormal voltage, internal short circuits, or poor electrochemical performance, ensuring the smooth progress of subsequent processes and the overall reliability of the product.

[0003] With the continuous improvement of automation in battery production, higher requirements are placed on the efficiency, accuracy, and adaptability of testing equipment. Traditional OCV testing methods mostly rely on manual operation or semi-automatic equipment. During the testing process, the battery needs to be placed on the testing platform, and the test probes need to be manually aligned with the positive and negative terminals of the battery. This is not only inefficient, but also prone to testing errors due to poor contact or uneven force, and may even damage the battery structure.

[0004] Meanwhile, existing testing fixtures still have shortcomings in terms of the flatness and positioning accuracy control of the battery support platform, which makes the battery prone to displacement or shaking during the test, affecting the repeatability and consistency of the test results. Utility Model Content

[0005] The purpose of this invention is to provide battery OCV testing fixtures and equipment to ensure testing accuracy and stability.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A battery OCV testing fixture includes a support unit, a lifting assembly, and a testing unit. The support unit includes a carrier plate and a limiting unit disposed on the carrier plate. The carrier plate is used to support the battery, and the limiting unit can limit the position of the battery on the carrier plate. The lifting assembly is disposed on one side of the support unit. The testing unit is connected to the lifting assembly and can move closer to the support unit along the Z-axis direction under the action of the lifting assembly, so that the testing unit can contact the positive and negative terminals of the battery.

[0008] As an optional technical solution for battery OCV testing fixtures, the lifting assembly includes a horizontal mounting assembly and a vertical mounting assembly; the horizontal mounting assembly is disposed on one side of the support unit; the vertical mounting assembly is slidably connected to the horizontal mounting assembly along the X-axis direction; the testing unit includes a first testing unit, which is slidably connected to the vertical mounting assembly along the Z-axis direction and is capable of contacting the positive and negative electrodes of a first type of battery, or the positive and negative electrodes of a second type of battery; the Z-axis direction is perpendicular to the X-axis direction.

[0009] As an optional technical solution for battery OCV testing fixtures, the horizontal mounting assembly includes a lifting guide rod, a lifting platform, and a first guide rail; the lifting guide rod is disposed on one side of the support unit; the lifting platform is movably sleeved on the lifting guide rod along the Z-axis direction; the first guide rail is fixed on the lifting platform, and the track of the first guide rail extends along the X-axis direction; wherein, the vertical mounting assembly is mounted on the first guide rail and can slide along the track of the first guide rail.

[0010] As an optional technical solution for battery OCV testing fixtures, the vertical mounting assembly includes a second guide rail and a third guide rail; the second guide rail is mounted on the first guide rail and can slide along the track of the first guide rail, the track of the second guide rail extending along the Z-axis direction; the third guide rail is mounted on the second guide rail and can slide along the track of the second guide rail, the track of the third guide rail extending along the Y-axis direction; the Y-axis direction, the X-axis direction, and the Z-axis direction are perpendicular to each other; wherein, the first testing unit is mounted on the third guide rail and can slide along the track of the third guide rail.

[0011] As an optional technical solution for battery OCV testing fixtures, the testing unit further includes a second testing unit, which is slidably connected to the horizontal mounting assembly along the X-axis direction; the second testing unit is mounted on the first guide rail and can slide along the track of the first guide rail, and can contact the positive and negative electrodes of the third type of battery.

[0012] As an optional technical solution for battery OCV testing fixtures, the first test unit is configured as two units, and each first test unit includes a first mounting block and a first probe; the first mounting block is mounted on the third guide rail and can slide along the track of the third guide rail; the first probe is disposed on the first mounting block; wherein, one of the two first probes can contact the positive electrode of the battery, and the other can contact the negative electrode of the battery; and / or, the second test unit is configured as two units, and each second test unit includes a second mounting block and a second probe; the second mounting block is mounted on the first guide rail and can slide along the track of the first guide rail; the second probe is disposed on the second mounting block; wherein, one of the two second probes can contact the positive electrode of the battery, and the other can contact the negative electrode of the battery.

[0013] As an optional technical solution for battery OCV testing fixtures, the first type of battery is a pouch battery with tabs at both ends; the second type of battery is a prismatic battery; and the third type of battery is a pouch battery with tabs on the same side.

[0014] As an optional technical solution for battery OCV testing fixtures, the limiting unit includes a first limiting component and a second limiting component; the first limiting component includes two end positioning blocks spaced apart and detachably mounted on the support plate, the two end positioning blocks respectively limiting the position of the two tabs of the first type of battery; the second limiting component includes an end limiting block and a side limiting block detachably mounted on the support plate, the end limiting block and the side limiting block respectively limiting the position of two adjacent sides of the second type of battery; and / or, the limiting unit includes a third limiting component, the third limiting component including a side positioning block detachably mounted on the support plate, the side positioning block limiting the position of the side of the first type of battery and limiting the position of the two tabs of the third type of battery.

[0015] As an optional technical solution for battery OCV testing fixtures, the vertical mounting assembly further includes a third mounting block, which is slidably connected to the first guide rail, and the second guide rail is fixed to the third mounting block.

[0016] A battery OCV testing device includes a machine base, a drive unit, a control unit, and the aforementioned battery OCV testing fixture; the battery OCV testing fixture is mounted on the machine base; the drive unit is connected to the lifting assembly and can drive the lifting assembly to move along the Z-axis; the control unit is mounted on the machine base, and the testing unit is communicatively connected to the control unit.

[0017] The beneficial effects of this utility model are:

[0018] The battery OCV testing fixture's support plate provides a stable and flat platform for the battery product, ensuring its physical stability during testing and preventing testing errors caused by uneven surfaces or uneven stress, thus improving load-bearing stability. The limiting unit effectively prevents battery displacement or shifting during testing by restricting the battery's position on the support plate, ensuring precise contact between the test probe and the battery tabs or terminals, and improving the repeatability and consistency of test data. The lifting assembly allows the test unit to move closer to or further away from the support unit along the Z-axis, achieving dynamic test contact and ensuring reliable contact between the test unit and the battery's positive and negative terminals. Simultaneously, displacement control adjusts the contact pressure, preventing poor contact or excessive pressure damage to the battery. The overall structural layout is reasonable, compact, and highly adaptable, balancing space utilization and ease of operation.

[0019] This battery OCV testing equipment integrates battery OCV testing fixtures with the machine base, drive unit, and control unit to automate the testing process, reduce manual intervention, and improve testing efficiency and consistency. The testing unit communicates with the control unit to achieve real-time acquisition, analysis, and feedback of voltage data, helping to promptly identify anomalies, optimize test parameters, and improve test quality. The drive unit can precisely control the movement of the lifting components, enabling precise control of key parameters such as test pressure and contact time, thus enhancing the level of automation in the testing process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the battery OCV testing fixture provided in this embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the battery OCV testing fixture and the same-side output tab soft-pack battery provided in this embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the battery OCV testing fixture and the soft-pack battery with tabs at both ends provided in this embodiment of the utility model;

[0023] Figure 4 This is a schematic diagram of the battery OCV testing fixture and the square-shell battery provided in this embodiment of the utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the battery OCV testing equipment provided in this embodiment of the utility model.

[0025] In the picture:

[0026] 100. Battery OCV testing fixture; 110. Fixture base; 120. Lifting guide rod; 130. Support unit; 131. Bearing plate; 132. End positioning block; 133. Side positioning block; 134. End limiting block; 135. Side limiting block; 140. Lifting platform; 150. First guide rail; 161. Second guide rail; 162. Third mounting block; 170. Third guide rail; 180. First testing unit; 181. First mounting block; 182. First probe; 190. Second testing unit; 191. First mounting block; 192. Second probe;

[0027] 810. Soft-pack battery with tabs on the same side; 820. Soft-pack battery with tabs at both ends; 830. Square battery; 900. Machine. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown 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 utility model, and should not be construed as limiting this utility model.

[0032] like Figures 1 to 4 As shown, one embodiment of this utility model provides a battery OCV testing fixture 100 for testing batteries. The battery OCV testing fixture 100 includes a support unit 130, a lifting assembly, and a testing unit. The support unit 130 includes a carrier plate 131 and a limiting unit disposed on the carrier plate 131. The carrier plate 131 is used to support the battery, and the limiting unit can limit the position of the battery on the carrier plate 131. The lifting assembly is disposed on one side of the support unit 130. The testing unit is connected to the lifting assembly and can move closer to the support unit 130 along the Z-axis direction under the drive of the lifting assembly, so that the testing unit can contact the positive and negative terminals of the battery.

[0033] The support plate 131 of the battery OCV testing fixture 100 provides a stable and flat support platform for the battery product, ensuring the physical stability of the battery during testing and avoiding test errors caused by uneven support surfaces or uneven stress, thus improving support stability. The limiting unit effectively prevents displacement or offset of the battery during testing by limiting its position on the support plate 131, thereby ensuring precise contact between the test probe and the battery tabs or terminals, improving the repeatability and consistency of test data. The lifting component allows the test unit to move closer to or further away from the support unit 130 along the Z-axis, achieving dynamic test contact and ensuring reliable contact between the test unit and the battery's positive and negative terminals. Simultaneously, the contact pressure can be adjusted through displacement control to avoid poor contact or excessive pressure damage to the battery. The overall structural layout is reasonable, compact, and highly adaptable, balancing space utilization and ease of operation.

[0034] In one embodiment of this utility model, the lifting assembly includes a horizontal mounting assembly and a vertical mounting assembly; the horizontal mounting assembly is disposed on one side of the support unit 130; the vertical mounting assembly is slidably connected to the horizontal mounting assembly along the X-axis direction; the testing unit includes a first testing unit 180, which is slidably connected to the vertical mounting assembly along the Z-axis direction and is capable of contacting the positive and negative electrodes of a first type of battery, or the positive and negative electrodes of a second type of battery; the Z-axis direction is perpendicular to the X-axis direction.

[0035] Through the coordinated movement of horizontal and vertical mounting components, the test unit can flexibly adjust its position to adapt to the tab distribution of different batteries, significantly improving the compatibility and adaptability of the battery OCV testing fixture 100. The layered structure design facilitates subsequent functional expansion, enhances the intelligence level of the testing system, and strengthens structural scalability. The first test unit 180 can not only contact the first type of battery, but also adapt to the second type of battery through positional adjustments in the X, Y, and Z axes, demonstrating its advantages in structural flexibility and functional integration, and exhibiting good versatility and scalability.

[0036] In one embodiment of this utility model, the horizontal mounting assembly includes a lifting guide rod 120, a lifting platform 140, and a first guide rail 150; the lifting guide rod 120 is disposed on one side of the support unit 130; the lifting platform 140 is movably sleeved on the lifting guide rod 120 along the Z-axis direction; the first guide rail 150 is fixed on the lifting platform 140, and the track of the first guide rail 150 extends along the X-axis direction; wherein, the vertical mounting assembly is mounted on the first guide rail 150 and can slide along the track of the first guide rail 150.

[0037] Specifically, in some embodiments, a linear bearing is connected to the lifting platform 140 to adjust the displacement of the lifting platform 140 in the Z-axis direction.

[0038] The lifting guide rod 120, in conjunction with a linear bearing, ensures the linear movement of the lifting platform 140 in the Z-axis direction, preventing offset or wobbling, thereby improving the stability and consistency of the contact between the test probe and the battery. Simultaneously, the first guide rail 150 extends along the X-axis, providing a sliding base for vertically mounted components, ensuring precise horizontal positioning and movement of the test unit, and improving testing efficiency.

[0039] Moreover, each guide rail component adopts a detachable connection method, which facilitates later maintenance, replacement or functional upgrades, reduces maintenance costs and extends the service life.

[0040] Furthermore, in some embodiments, the vertical mounting assembly includes a second guide rail 161 and a third guide rail 170; the second guide rail 161 is mounted on the first guide rail 150 and can slide along the track of the first guide rail 150, the track of the second guide rail 161 extending along the Z-axis direction; the third guide rail 170 is mounted on the second guide rail 161 and can slide along the track of the second guide rail 161, the track of the third guide rail 170 extending along the Y-axis direction; the Y-axis direction, the X-axis direction and the Z-axis direction are perpendicular to each other; wherein, the first test unit 180 is mounted on the third guide rail 170 and can slide along the track of the third guide rail 170.

[0041] The test unit can be freely adjusted in the Y, X, and Z axes to adapt to various complex situations such as different tab positions, different terminal heights, and tilted battery placement, greatly expanding the application range of the battery OCV testing fixture 100. The first guide rail 150, the second guide rail 161, and the third guide rail 170 work together to form a high-precision sliding system, ensuring the movement accuracy and repeatability of the test unit, thus improving the reliability of the test results.

[0042] Furthermore, the guide rails are detachably connected, making it easy to replace guide rails or test units of different specifications according to the battery type, thus improving the flexibility and maintainability of the test system.

[0043] Furthermore, the test unit also includes a second test unit 190, which is slidably connected to the horizontal mounting assembly along the X-axis direction; the second test unit 190 is mounted on the first guide rail 150 and can slide along the track of the first guide rail 150, and can contact the positive and negative electrodes of the third type of battery.

[0044] The second test unit 190 slides along the X-axis and can cooperate with the first test unit 180 to achieve parallel testing of different batteries, improving testing efficiency. The second test unit 190 is particularly suitable for the third type of battery, as its position can be flexibly adjusted to adapt to changes in tab spacing, enhancing its adaptability to testing complex battery structures. The independent configuration of the second test unit 190 provides an interface for future expansion, facilitating functional expansion and improving system integration capabilities.

[0045] In one embodiment of this invention, two first test units 180 are configured, and each first test unit 180 includes a first mounting block 181 and a first probe 182; the first mounting block 181 is mounted on a third guide rail 170 and can slide along the track of the third guide rail 170; the first probe 182 is disposed on the first mounting block 181; wherein, one of the two first probes 182 can contact the positive terminal of the battery, and the other can contact the negative terminal of the battery; and two second test units 190 are configured, and each second test unit 190 includes a second mounting block 191 and a second probe 192; the second mounting block 191 is mounted on a first guide rail 150 and can slide along the track of the first guide rail 150; the second probe 192 is disposed on the second mounting block 191; wherein, one of the two second probes 192 can contact the positive terminal of the battery, and the other can contact the negative terminal of the battery.

[0046] The probes are slidably mounted on the mounting block to ensure perpendicular contact with the battery tabs or terminals, reducing contact resistance, ensuring good electrical contact, and improving the accuracy of voltage acquisition. Each test unit is equipped with two probes, one contacting the positive and one the negative terminal, enabling bipolar voltage acquisition in a single test and improving testing efficiency. The probes are slidably connected to the mounting block, facilitating adjustments to probe spacing and position to accommodate different battery models and tab layouts, enhancing testing flexibility and applicability.

[0047] In another embodiment of this invention, only the specific structure of the first test unit 180 is limited as described above. In yet another embodiment of this invention, only the specific structure of the second test unit 190 is limited as described above.

[0048] In one embodiment of this utility model, the battery is a solid-state lithium battery, and the first type of battery is... Figure 3 The two-terminal tab soft-pack battery shown is 820; the second type of battery is... Figure 4 The square-shell battery 830 shown; the third type of battery is Figure 2 The same-side output tab soft-pack battery 810 is shown.

[0049] The combined design of the limiting unit and the testing unit achieves compatibility with three typical battery structures, meeting the testing requirements of current mainstream battery products. Clearly defining the compatible battery types helps demonstrate the broad applicability of the Battery OCV Testing Fixture 100, facilitates market application expansion, and enhances the technological value of the patent. For different battery types, the limiting structure and testing unit can be flexibly combined to ensure optimal testing stability and contact reliability for each type of battery.

[0050] Continue to refer to Figures 1 to 4In one embodiment of this invention, the limiting unit includes a first limiting component, a second limiting component, and a third limiting component. The first limiting component includes two end positioning blocks 132 spaced apart and detachably mounted on the support plate 131, which respectively limit the position of the two tabs of the first type of battery. The second limiting component includes an end limiting block 134 and a side limiting block 135 detachably mounted on the support plate 131, which respectively limit the position of two adjacent sides of the second type of battery. The third limiting component includes a side positioning block 133 detachably mounted on the support plate 131, which can limit the position of the side of the first type of battery and the position of the two tabs of the third type of battery.

[0051] The aforementioned limiting unit includes various components such as the end positioning block 132, the side positioning block 133, and the side limiting stop 135. These components can be combined and replaced according to the battery type to achieve flexible and precise limiting of batteries with different shapes. Each limiting component is detachable, facilitating quick replacement or adjustment according to testing requirements, shortening changeover time, and improving production cycle time. The limiting structure effectively prevents battery displacement or tilting during testing, avoiding test abnormalities due to poor contact, and improving test safety and data stability.

[0052] Specifically, the side positioning block 133 has two spaced storage spaces, which respectively accommodate the two tabs of the soft-pack battery 810 with tabs on the same side. The end positioning block 132 has storage spaces, and each end positioning block 132 has a storage space that respectively accommodates the two tabs of the soft-pack battery 820 with tabs at both ends.

[0053] In another embodiment of this invention, the limiting unit is limited to including only the first limiting component and the second limiting component. In yet another embodiment of this invention, the limiting unit is limited to including only the third limiting component.

[0054] In one embodiment of the present invention, the vertical mounting assembly further includes a third mounting block 162, which is slidably connected to the first guide rail 150, and the second guide rail 161 is fixed on the third mounting block 162.

[0055] The third mounting block 162, serving as an intermediate connecting component, makes the connection between the vertical and horizontal mounting components more robust, improving the overall structural stability and motion accuracy. The introduction of the third mounting block 162 allows the vertical mounting component to be assembled or replaced as an independent module, improving system integration efficiency and ease of maintenance.

[0056] Moreover, this structural design provides a reliable installation foundation for subsequent functional expansion, enhancing the overall level of intelligence and automation.

[0057] In one embodiment of the present invention, the battery OCV testing fixture 100 further includes a fixture base 110, which supports the bearing plate 131, and the lifting guide rod 120 is fixedly connected to the fixture base 110.

[0058] like Figure 5 As shown, an embodiment of the present invention also provides a battery OCV testing device, including a machine base 900, a drive unit, a control unit, and the aforementioned battery OCV testing fixture 100; the battery OCV testing fixture 100 is disposed on the machine base 900; the drive unit is connected to the lifting assembly and can drive the lifting assembly to move along the Z-axis direction; the control unit is disposed on the machine base 900, and the testing unit is communicatively connected to the control unit.

[0059] This battery OCV testing equipment integrates the battery OCV testing fixture 100 with the machine base 900, drive unit, and control unit to automate the testing process, reduce manual intervention, and improve testing efficiency and consistency. The testing unit and control unit communicate to achieve real-time acquisition, analysis, and feedback of voltage data, helping to promptly identify anomalies, optimize test parameters, and improve test quality. The drive unit can precisely control the movement of the lifting components, enabling precise control of key parameters such as test pressure and contact time, thus enhancing the level of automation in the testing process.

[0060] Meanwhile, thanks to the presence of communication connection and control unit, the battery OCV testing equipment has good scalability and can be connected to modules such as image recognition, AI algorithms, and remote monitoring in the future to improve the overall level of intelligence.

[0061] In one embodiment of this utility model, the battery OCV testing equipment is used to test the internal resistance performance of solid-state lithium batteries, such as charging tests, discharging tests, and side voltage tests.

[0062] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery OCV testing fixture, characterized in that, include: The support unit (130) includes a support plate (131) and a limiting unit disposed on the support plate (131). The support plate (131) is used to support the battery, and the limiting unit can limit the position of the battery on the support plate (131). A lifting assembly is disposed on one side of the support unit (130); The test unit is connected to the lifting assembly and can approach the support unit (130) along the Z-axis direction under the drive of the lifting assembly, so that the test unit can contact the positive and negative terminals of the battery.

2. The battery OCV testing fixture according to claim 1, characterized in that, The lifting assembly includes: A horizontally mounted assembly is disposed on one side of the support unit (130); and A vertical mounting component is slidably connected to the horizontal mounting component along the X-axis direction; The test unit includes: The first test unit (180) is slidably connected to the vertical mounting assembly along the Z-axis direction and is capable of contacting the positive and negative electrodes of the first type of battery or the positive and negative electrodes of the second type of battery; the Z-axis direction is perpendicular to the X-axis direction.

3. The battery OCV testing fixture according to claim 2, characterized in that, The horizontal mounting assembly includes: A lifting guide rod (120) is disposed on one side of the support unit (130); A lifting platform (140) is movably mounted on the lifting guide rod (120) along the Z-axis direction; and The first guide rail (150) is fixed on the lifting platform (140), and the track of the first guide rail (150) extends along the X-axis direction; The vertical mounting component is mounted on the first guide rail (150) and can slide along the track of the first guide rail (150).

4. The battery OCV testing fixture according to claim 3, characterized in that, The vertical mounting assembly includes: A second guide rail (161) is mounted on the first guide rail (150) and can slide along the track of the first guide rail (150), the track of the second guide rail (161) extending along the Z-axis direction; and The third guide rail (170) is mounted on the second guide rail (161) and can slide along the track of the second guide rail (161). The track of the third guide rail (170) extends along the Y-axis direction. The Y-axis direction, the X-axis direction and the Z-axis direction are perpendicular to each other. The first test unit (180) is mounted on the third guide rail (170) and can slide along the track of the third guide rail (170).

5. The battery OCV testing fixture according to claim 4, characterized in that, The test unit further includes a second test unit (190), which is slidably connected to the horizontal mounting assembly along the X-axis direction; the second test unit (190) is mounted on the first guide rail (150) and can slide along the track of the first guide rail (150) and can contact the positive and negative electrodes of the third type of battery.

6. The battery OCV testing fixture according to claim 5, characterized in that, The first test unit (180) is configured in pairs, and each first test unit (180) includes: A first mounting block (181) is mounted on the third guide rail (170) and is slidable along the track of the third guide rail (170); and The first probe (182) is disposed on the first mounting block (181); One of the two first probes (182) can contact the positive electrode of the battery, and the other can contact the negative electrode of the battery; And / or, the second test unit (190) is configured as two, and each of the second test units (190) includes: The second mounting block (191) is mounted on the first guide rail (150) and can slide along the track of the first guide rail (150); and The second probe (192) is disposed on the second mounting block (191); One of the two second probes (192) can contact the positive electrode of the battery, and the other can contact the negative electrode of the battery.

7. The battery OCV testing fixture according to claim 6, characterized in that, The first type of battery is a pouch battery with tabs at both ends; the second type of battery is a prismatic battery; and the third type of battery is a pouch battery with tabs on the same side.

8. The battery OCV testing fixture according to claim 5, characterized in that, The limiting unit includes: The first limiting component includes two end positioning blocks (132) spaced apart and detachably mounted on the support plate (131), the two end positioning blocks (132) respectively limiting the position of the two tabs of the first type of battery; The second limiting component includes an end limiting block (134) and a side limiting block (135) detachably disposed on the support plate (131). The end limiting block (134) and the side limiting block (135) are respectively used to limit the position of two adjacent sides of the second type of battery. And / or, the limiting unit includes: The third limiting component includes a side positioning block (133) detachably mounted on the support plate (131), the side positioning block (133) being able to limit the position of the side of the first type of battery and the position of the two tabs of the third type of battery.

9. The battery OCV testing fixture according to claim 4, characterized in that, The vertical mounting assembly further includes a third mounting block (162), which is slidably connected to the first guide rail (150), and the second guide rail (161) is fixed to the third mounting block (162).

10. A battery OCV testing device, characterized in that, include: Machine (900); The battery OCV testing fixture according to any one of claims 1-9, wherein the battery OCV testing fixture is disposed on the machine base (900); A drive unit is connected to the lifting assembly and is capable of driving the lifting assembly to move along the Z-axis direction; as well as A control unit is located on the machine tool (900), and the test unit is communicatively connected to the control unit.

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