OCV test equipment
By designing a device for OCV testing, by pressing the battery ears between the flattened blocks, the problem of low accuracy of the test results of existing OCV testing equipment is solved, and higher test accuracy and space efficiency are achieved.
Patent Information
- Application Number
- CN202421894667.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-06
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-08-06
AI Technical Summary
The test results of existing OCV testing equipment are relatively accurate.
An OCV testing device including a first leveling block, a second leveling block, a test probe and a driving mechanism is designed. By pressing the pole ear between the leveling blocks, the deformation and displacement of the pole ear during the test process is reduced and the test stability is improved.
By reducing deformation and displacement of the polar ear, the accuracy of OCV test results is improved and space is saved.
Smart Images
Figure CN223051486U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of battery testing equipment, and more particularly, to OCV testing equipment. Background Art
[0002] OCV (open circuit voltage) refers to the voltage of a battery in an open circuit state. To perform an OCV test on the battery cells, a related art provides an OCV testing equipment. The OCV testing equipment measures the battery characteristics by pressing test probes connected to a voltage tester and an internal resistance tester onto the positive and negative electrode tabs of the battery cells.
[0003] However, the accuracy of the test results of the OCV testing equipment in the related art is relatively low. Summary of the Utility Model
[0004] This application provides an OCV testing equipment to solve the problem of how to improve the accuracy of the OCV test results for batteries.
[0005] According to one aspect of the present application, an OCV testing device is provided for performing an OCV test on a battery cell, the OCV testing device comprising a first leveling block, a second leveling block, two first test probes, two second test probes, a first drive mechanism, a second drive mechanism and a third drive mechanism. The first leveling block has a bearing surface for bearing two tabs of the battery cell, the first leveling block is provided with two first vias, the first vias penetrate the first leveling block along a first direction, the two first vias are arranged at intervals along a second direction, and are used to correspond one-to-one with the two tabs, wherein the second direction is perpendicular to the first direction. The second leveling block is opposite to the first leveling block and is arranged at intervals along the first direction, the second leveling block is provided with a second via, the second via penetrates the second leveling block along the first direction, and the second via is arranged opposite to the first via along the first direction. The two first test probes correspond one-to-one with the two first vias, the first test probes are adaptively arranged in the corresponding first vias, and one end of the first test probe close to the second leveling block is flush with the bearing surface, so that the first test probe can contact the back of the corresponding tab. The two second test probes correspond to the two first vias one by one, and are arranged opposite to and spaced from the corresponding first test probes along the first direction. The second test probes are movably arranged in the second vias along the first direction, so that the end of the second test probe close to the first leveling block can contact the front of the corresponding pole ear. The first driving mechanism is connected to the first leveling block in a transmission manner to drive the first leveling block and the first test probe to move along the first direction toward the side close to the second leveling block, so that the first test probe contacts the back of the pole ear. The second driving mechanism is connected to the second leveling block in a transmission manner to drive the second leveling block to move along the first direction toward the side close to the first leveling block, so as to press the pole ear between the first leveling block and the second leveling block. The third driving mechanism is connected to the second test probe in a transmission manner to drive the second test probe to move along the first direction toward the side close to the first leveling block, so that the end of the second test probe close to the first leveling block can pass through the second via and contact the front of the pole ear.
[0006] The above-mentioned OCV testing equipment, by setting a first leveling block, a second leveling block, a first driving mechanism and a second driving mechanism, can first press the pole ear between the first leveling block and the second leveling block before performing the OCV test on the pole ear, so that during the OCV test, the pole ear is subjected to the pressing force of the first leveling block and the second leveling block, thereby reducing the deformation and displacement of the pole ear during the test and improving the stability of the pole ear during the test, which is beneficial to improving the accuracy of the OCV test results.
[0007] In one embodiment, the OCV testing device further includes an insulating member connected to the first leveling block and located between the two first via holes for isolating the two tabs.
[0008] In one embodiment, the insulating member includes an elastic portion and a connecting portion. The elastic portion is located on the bearing surface and extends in the third direction. One end of the elastic portion in the third direction is located between two first through holes, where the third direction is perpendicular to the second direction and the first direction respectively. The connecting portion is connected to one end of the elastic portion away from the first through hole in the third direction, and the connecting portion is inserted into the first leveling block.
[0009] In one embodiment, the battery cell further includes a battery cell body. The tab includes a first portion and a second portion. The first portion is connected to the battery cell body. The second portion is connected to the first portion and extends out of the battery cell body. The first portion is clamped between the first leveling block and the second leveling block, and the second portion is clamped between the first test probe and the second test probe.
[0010] In one embodiment, the inner walls of the second through holes are respectively arranged at intervals from the outer peripheral walls of the two second test probes.
[0011] In one embodiment, the OCV test device further includes a base body, and the base body is respectively supported by the first driving mechanism and the second driving mechanism. The third driving mechanism is connected to the second driving mechanism.
[0012] In one embodiment, the base body has a first side and a second side facing away from each other in the third direction, where the third direction is perpendicular to the second direction and the first direction respectively. One side of the first driving mechanism is connected to the first side. One side of the second driving mechanism is connected to the second side, and the other side of the second driving mechanism is connected to the third driving mechanism.
[0013] In one embodiment, the first driving mechanism includes a first cylinder block, a first rod body and a first sliding table. The first cylinder block is connected to the first side. The first rod body is movably disposed through the first cylinder block in the first direction. The first sliding table is connected to one end of the first rod body extending out of the first cylinder block, and the first sliding table is connected to the first leveling block. The second driving mechanism includes a second cylinder block, a second rod body and a second sliding table. The second cylinder block is connected to the second side. The second rod body is movably disposed through the second cylinder block in the first direction. The second sliding table is connected to one end of the second rod body extending out of the second cylinder block, and the second sliding table is connected to the second leveling block. The third driving mechanism includes a third cylinder block, a third rod body and a third sliding table. The third cylinder block is connected to the second sliding table. The third rod body is movably disposed through the third cylinder block in the first direction. The third sliding table is connected to one end of the third rod body extending out of the third cylinder block, and the third sliding table is connected to the second test probe.
[0014] In one embodiment, the OCV testing device further includes a first connecting plate, a second connecting plate, and a third connecting plate. One end of the first connecting plate is connected to the first sliding table, and the other end of the first connecting plate protrudes outward from the seat body along the third direction and is connected to the first flattening block. One end of the second connecting plate is connected to the second sliding table, and the other end of the second connecting plate extends along the third direction toward the side close to the first flattening block and is connected to the second flattening block. One end of the third connecting plate is connected to the third sliding table, and the other end of the third connecting plate extends along the third direction toward the side close to the first flattening block and is connected to the second test probe.
[0015] In one embodiment, along the first direction, the surface of the first flattening block close to the second flattening block protrudes from the surface of the first connecting plate close to the second flattening block, and the surface of the second flattening block close to the first flattening block protrudes from the surface of the second connecting plate close to the first flattening block. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.
[0017] Figure 1 It is a schematic structural diagram of the OCV testing device in an embodiment of the present application, and the battery cell is additionally shown in the figure.
[0018] Figure 2 It is Figure 1 A partial enlarged view of part A of the OCV testing device in the shown embodiment.
[0019] Figure 3 It is Figure 1 A schematic structural diagram of the battery cell in the shown embodiment.
[0020] Figure 4 It is Figure 1 A partial structural schematic diagram of the battery cell in the shown embodiment from another perspective.
[0021] Figure 5 It is Figure 1 A partial top view of the first flattening block, the first test probe, the insulating member, and the battery cell in the shown embodiment.
[0022] Figure 6 It is Figure 1 An exploded schematic diagram of the first flattening block and the insulating member in the shown embodiment.
[0023] Figure 7 It is Figure 1Schematic structural diagram of the OCV test device in the illustrated embodiment from another perspective.
[0024] Figure 8 is Figure 1 Side view of the OCV test device in the illustrated embodiment.
[0025] Description of main component symbols:
[0026] OCV test device 100
[0027] First leveling block 10
[0028] Carrying surface 11m
[0029] First through hole 11a
[0030] Second leveling block 20
[0031] First through hole 20a
[0032] First test probe 30
[0033] Second test probe 40
[0034] Second through hole 40a
[0035] First driving mechanism 50
[0036] First cylinder block 51
[0037] First rod 52
[0038] First sliding table 53
[0039] Second driving mechanism 60
[0040] Second cylinder block 61
[0041] Second rod 62
[0042] Second sliding table 63
[0043] Third driving mechanism 70
[0044] Third cylinder block 71
[0045] Third rod 72
[0046] Third sliding table 73
[0047] Insulating part 80
[0048] Elastic part 81
[0049] Connecting part 82
[0050] Base body 90
[0051] The first side 91
[0052] The second side 92
[0053] The first connecting plate 110
[0054] The second connecting plate 120
[0055] The third connecting plate 130 The battery cell 200 The tab 201 The front side 201m
[0056] The back side 201n
[0057] The first part 2011
[0058] The second part 2012 The battery cell body 202
[0059] The first direction X
[0060] The second direction Y
[0061] The third direction Z Specific embodiments
[0062] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.
[0063] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. When an element is considered to be "disposed on" another element, it can be directly disposed on the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.
[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the description of the present application herein are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.
[0065] Some embodiments of the present application will be described in detail. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.
[0066] Embodiment
[0067] Figure 1 FIG. 5 is a schematic structural diagram of an OCV test device 100 in an embodiment of the present application, in which a battery cell 200 is additionally shown; Figure 2 is Figure 1 a partially enlarged view of part A of the OCV test device 100 in the embodiment shown; Figure 3 is Figure 1 a schematic structural diagram of the battery cell 200 in the embodiment shown; Figure 4 is Figure 1 a partial structural schematic diagram of the battery cell 200 in another perspective in the embodiment shown.
[0068] Referring to Figures 1 to 3 , an embodiment of the present application provides an OCV test device 100 for performing an OCV test on a battery cell 200. The OCV test device 100 includes a first flattening block 10, a second flattening block 20, two first test probes 30, two second test probes 40, a first driving mechanism 50, a second driving mechanism 60, and a third driving mechanism 70.
[0069] The first flattening block 10 has a bearing surface 11m for bearing two tab ears 201 of the battery cell 200. The first flattening block 10 is provided with two first through holes 20a that penetrate the first flattening block 10 along a first direction X. The two first through holes 20a are spaced apart along a second direction Y and are used to correspond to the two tab ears 201 one by one, where the second direction Y is perpendicular to the first direction X. The second flattening block 20 is opposite to and spaced apart from the first flattening block 10 along the first direction X. The second flattening block 20 is provided with a second through hole 40a that penetrates the second flattening block 20 along the first direction X. The second through hole 40a is disposed opposite to the first through hole 20a along the first direction X. The two first test probes 30 correspond to the two first through holes 20a one by one. The first test probe 30 is adaptively inserted into the corresponding first through hole 20a. The end of the first test probe 30 close to the second flattening block 20 is flush with the bearing surface 11m, so that the first test probe 30 can contact the back surface 201n of the corresponding tab ear 201 (see Figure 4)。Two second test probes 40 correspond to the two first vias 20a one by one, and are disposed opposite and spaced apart from the corresponding first test probes 30 along the first direction X. The second test probe 40 is movably disposed through the second via 40a along the first direction X, so that one end of the second test probe 40 close to the first flattening block 10 can contact the front surface 201m of the corresponding tab 201. The first driving mechanism 50 is drivingly connected to the first flattening block 10 to drive the first flattening block 10 and the first test probe 30 to move together along the first direction X toward the second flattening block 20, so that the first test probe 30 contacts the back surface 201n of the tab 201. The second driving mechanism 60 is drivingly connected to the second flattening block 20 to drive the second flattening block 20 to move along the first direction X toward the first flattening block 10, so as to press the tab 201 between the first flattening block 10 and the second flattening block 20. The third driving mechanism 70 is drivingly connected to the second test probe 40 to drive the second test probe 40 to move along the first direction X toward the first flattening block 10, so that one end of the second test probe 40 close to the first flattening block 10 can pass through the second via 40a and contact the front surface 201m of the tab 201.
[0070] For the above OCV test device 100, by providing the first flattening block 10, the second flattening block 20, the first driving mechanism 50 and the second driving mechanism 60, before performing the OCV test on the battery cell 200, the tab 201 of the battery cell 200 can be first pressed between the first flattening block 10 and the second flattening block 20, so as to flatten the tab 201 and fix the tab 201 relative to the first flattening block 10 and the second flattening block 20. By providing the first via 20a on the first flattening block 10 for the first test probe 30 to pass through, so as to contact the back surface 201n of the tab 201, and providing the second via 40a on the second flattening block 20 for the second test probe 40 to pass through, so as to contact the front surface 201m of the tab 201, and then the OCV test can be performed on the battery cell 200 after the first test probe 30 and the second test probe 40 are conducted. During the test process, since the tab 201 is subjected to the pressing force applied by the first flattening block 10 and the second flattening block 20, the deformation and displacement of the tab 201 during the test are reduced, and the stability of the tab 201 during the test is improved, which is beneficial to improving the accuracy of the OCV test result. And since the OCV test device 100 has the functions of flattening and testing respectively, it can save space.
[0071] It should be noted that, such as Figure 3 and Figure 4As shown, the battery cell 200 further includes a battery cell body 202. The tab 201 includes a first portion 2011 and a second portion 2012. The first portion 2011 is connected to the battery cell body 202. The second portion 2012 is connected to the first portion 2011 and extends out of the battery cell body 202. One surface of the second portion 2012 along the first direction X is the front surface 201m of the tab 201, and the other surface of the second portion 2012 along the first direction X is the back surface 201n of the tab 201.
[0072] During use, first place the battery cell 200 at the position of the OCV test device 100, and make the tab 201 located between the first flattening block 10 and the second flattening block 20 along the first direction X. Then, drive the first flattening block 10 and the first test probe 30 to move together along the first direction X towards the side close to the second flattening block 20 through the first driving mechanism 50 until the first test probe 30 contacts the back surface 201n of the tab 201. Then, drive the second flattening block 20 to move along the first direction X towards the side close to the first flattening block 10 through the second driving mechanism 60 until the second flattening block 20 presses the tab 201 between the second flattening block 20 and the first flattening block 10 to flatten the tab 201. After the tab 201 is flattened, drive the second test probe 40 to move along the first direction X towards the side close to the first flattening block 10 through the third driving mechanism 70 until the second test probe 40 contacts the front surface 201m of the tab 201. After the first test probe 30 and the second test probe 40 are conducted, perform an OCV test on the battery cell 200.
[0073] Figure 5 For Figure 1 A partial structural top view of the first flattening block 10, the first test probe 30, the insulating member 80, and the battery cell 200 in the illustrated embodiment.
[0074] In some embodiments, as Figure 5 shown, the OCV test device 100 further includes an insulating member 80. The insulating member 80 is connected to the first flattening block 10 and is located between two first through holes 20a, and is used to block the two tabs 201 to prevent the two tabs 201 from contacting each other and causing a short circuit.
[0075] Figure 6 For Figure 1 An exploded view of the first flattening block 10 and the insulating member 80 in the illustrated embodiment.
[0076] In some embodiments, as Figure 6As shown, the insulating member 80 includes an elastic portion 81 and a connecting portion 82. The elastic portion 81 is located on the bearing surface 11m and extends along the third direction Z. One end of the elastic portion 81 along the third direction Z is located between two first through holes 20a. Here, the third direction Z is perpendicular to the second direction Y and the first direction X respectively. The connecting portion 82 is connected to one end of the elastic portion 81 away from the first through hole 20a along the third direction Z, and the connecting portion 82 is inserted into the first flattening block 10. In this way, the elastic portion 81 is provided so that when the first flattening block 10 and the second flattening block 20 (see Figure 2 ) compress the tab 201, the elastic portion 81 can be compressed and deformed under the action of the pressing force, thereby avoiding affecting the flattening of the tab 201. It should be understood that the elastic portion 81 is made of an insulating material to isolate the two tabs 201 and avoid short circuit.
[0077] In some embodiments, in combination with Figure 4 and Figure 5 as shown, the battery cell 200 further includes a battery cell body 202. The tab 201 includes a first portion 2011 and a second portion 2012. The first portion 2011 is connected to the battery cell body 202. The second portion 2012 is connected to the first portion 2011 and extends out of the battery cell body 202. The first portion 2011 is clamped between the first flattening block 10 and the second flattening block 20 (see Figure 2 ). The second portion 2012 is clamped between the first test probe 30 and the second test probe 40. In this way, since the second portion 2012 is connected to the first portion 2011, when the first flattening block 10 and the second flattening block 20 compress the first portion 2011, the deformation and displacement of the second portion 2012 can be reduced. Therefore, when the second portion 2012 is clamped between the first test probe 30 and the second test probe 40 for testing, it is beneficial to improve the accuracy of the test result. Specifically, the first portion 2011 is borne on the first flattening block 10.
[0078] In some embodiments, as Figure 2 shown, the inner walls of the second through holes 40a are respectively spaced from the outer peripheral walls of the two second test probes 40 to prevent the second flattening block 20 from affecting the movement of the second test probe 40 along the first direction X.
[0079] Figure 7 For Figure 1 the structural schematic diagram of the OCV test device 100 in the embodiment shown from another perspective.
[0080] In some embodiments, as Figure 7 shown, the OCV test device 100 further includes a base body 90. The base body 90 respectively supports the first driving mechanism 50 and the second driving mechanism 60, and the third driving mechanism 70 is connected to the second driving mechanism 60.
[0081] In some embodiments, as Figure 7 shown, the base body 90 has a first side 91 and a second side 92 facing away from each other along the third direction Z, wherein the third direction Z is perpendicular to the second direction Y and the first direction X respectively. One side of the first driving mechanism 50 is connected to the first side 91, one side of the second driving mechanism 60 is connected to the second side 92, and the other side of the second driving mechanism 60 is connected to the third driving mechanism 70. In this way, space is saved, and it is convenient to arrange the first driving mechanism 50, the second driving mechanism 60 and the third driving mechanism 70.
[0082] Figure 8 For Figure 1 the side view of the OCV test device 100 in the shown embodiment.
[0083] In some embodiments, as Figure 8 shown, the first driving mechanism 50 includes a first cylinder body 51, a first rod body 52 and a first sliding table 53. The first cylinder body 51 is connected to the first side 91. The first rod body 52 is movably disposed in the first cylinder body 51 along the first direction X. The first sliding table 53 is connected to one end of the first rod body 52 extending out of the first cylinder body 51, and the first sliding table 53 is connected to the first leveling block 10. The second driving mechanism 60 includes a second cylinder body 61, a second rod body 62 and a second sliding table 63. The second cylinder body 61 is connected to the second side 92. The second rod body 62 is movably disposed in the second cylinder body 61 along the first direction X. The second sliding table 63 is connected to one end of the second rod body 62 extending out of the second cylinder body 61, and the second sliding table 63 is connected to the second leveling block 20. The third driving mechanism 70 includes a third cylinder body 71, a third rod body 72 and a third sliding table 73. The third cylinder body 71 is connected to the second sliding table 63. The third rod body 72 is movably disposed in the third cylinder body 71 along the first direction X. The third sliding table 73 is connected to one end of the third rod body 72 extending out of the third cylinder body 71, and the third sliding table 73 is connected to the second test probe 40. In this way, when the second rod body 62 moves relative to the second cylinder body 61 along the first direction X, the second leveling block 20 and the third cylinder body 71 are driven to move together by the second sliding table 63. Thus, before leveling the tab 201, the second test probe 40 and the second leveling block 20 move together along the first direction X, which is beneficial to reducing the moving distance of the second test probe 40 along the first direction X after the leveling process.
[0084] In some embodiments, as Figure 8As shown, the OCV testing device 100 further includes a first connecting plate 110, a second connecting plate 120, and a third connecting plate 130. One end of the first connecting plate 110 is connected to the first sliding table 53, and the other end of the first connecting plate 110 protrudes outward along the third direction Z away from the seat body 90 and is connected to the first flattening block 10. One end of the second connecting plate 120 is connected to the second sliding table 63, and the other end of the second connecting plate 120 extends along the third direction Z toward the side close to the first flattening block 10 and is connected to the second flattening block 20. One end of the third connecting plate 130 is connected to the third sliding table 73, and the other end of the third connecting plate 130 extends along the third direction Z toward the side close to the first flattening block 10 and is connected to the second test probe 40. In this way, the first flattening block 10 is located outside the first driving mechanism 50 along the third direction Z so as to be aligned with the tab 201 (see Figure 4 ). By setting both the second connecting plate 120 and the third connecting plate 130 to extend along the third direction Z toward the side close to the first flattening block 10, it is convenient for the second flattening block 20 and the first flattening block 10 to face each other along the first direction X, and the second test probe 40 and the first test probe 30 to face each other along the first direction X, thereby facilitating shaping and OCV testing.
[0085] In some embodiments, as Figure 8 shown, along the first direction X, the surface of the first flattening block 10 close to the second flattening block 20 protrudes from the surface of the first connecting plate 110 close to the second flattening block 20, and the surface of the second flattening block 20 close to the first flattening block 10 protrudes from the surface of the second connecting plate 120 close to the first flattening block 10, which is beneficial to improving the pressing effect of the first flattening block 10 and the second flattening block 20 on the tab 201.
[0086] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the above preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.
Claims
1. An OCV testing device, characterized in that: Used to perform OCV testing on the battery cell, the OCV testing equipment includes: A first leveling block having a bearing surface for bearing the two tabs of the battery cell, the first leveling block being provided with two first via holes, the first via holes penetrating the first leveling block along a first direction, the two first via holes being spaced apart along a second direction and being used for corresponding to the two tabs one by one, wherein the second direction is perpendicular to the first direction; a second leveling block, arranged opposite to and spaced from the first leveling block along the first direction, the second leveling block being provided with a second via hole, the second via hole penetrating the second leveling block along the first direction, the second via hole being arranged opposite to the first via hole along the first direction; Two first test probes, corresponding to the two first vias one by one, the first test probes are adaptively arranged in the corresponding first vias, and one end of the first test probe close to the second leveling block is flush with the bearing surface, so that the first test probes can contact the back side of the corresponding tab; Two second test probes, corresponding to the two first vias one by one, and arranged opposite to and spaced from the corresponding first test probes along the first direction, the second test probes being movably arranged in the second vias along the first direction so that one end of the second test probe close to the first leveling block can contact the front side of the corresponding tab; A first driving mechanism is transmission-connected to the first leveling block to drive the first leveling block and the first test probe to move together along the first direction toward a side close to the second leveling block, so that the first test probe contacts the back side of the tab; a second driving mechanism, drivingly connected to the second leveling block, to drive the second leveling block to move along the first direction toward a side close to the first leveling block, thereby pressing the tab between the first leveling block and the second leveling block; The third driving mechanism is transmission-connected to the second test probe to drive the second test probe to move along the first direction toward the side close to the first leveling block, so that the end of the second test probe close to the first leveling block can pass through the second via hole and contact the front side of the tab.
2. The OCV testing device according to claim 1, characterized in that: The OCV testing device further includes an insulating member connected to the first leveling block and located between the two first via holes for blocking the two tabs.
3. The OCV testing device according to claim 2, characterized in that: The insulating member comprises an elastic portion and a connecting portion; The elastic portion is located on the bearing surface and extends along a third direction, and one end of the elastic portion along the third direction is located between two first via holes, wherein the third direction is perpendicular to the second direction and the first direction respectively; The connecting portion is connected to an end of the elastic portion along the third direction away from the first via hole, and the connecting portion is plugged into the first leveling block.
4. The OCV testing device according to claim 1, characterized in that: The battery cell further comprises a battery cell body, the tab comprises a first portion and a second portion, the first portion is connected to the battery cell body, the second portion is connected to the first portion and extends out of the battery cell body; The first portion is clamped between the first leveling block and the second leveling block, and the second portion is clamped between the first test probe and the second test probe.
5. The OCV testing device according to claim 1, characterized in that: The inner wall of the second via hole is spaced apart from the outer peripheral walls of the two second test probes respectively.
6. The OCV testing device according to claim 1, characterized in that: The OCV testing device further comprises a seat body, and the seat body is respectively supported by the first driving mechanism and the second driving mechanism; The third driving mechanism is connected to the second driving mechanism.
7. The OCV testing device according to claim 6, characterized in that: The seat body has a first side and a second side opposite to each other along a third direction, wherein the third direction is perpendicular to the second direction and the first direction respectively; One side of the first driving mechanism is connected to the first side; One side of the second driving mechanism is connected to the second side, and the other side of the second driving mechanism is connected to the third driving mechanism.
8. The OCV testing device according to claim 7, characterized in that: The first driving mechanism includes a first cylinder, a first rod and a first slide, the first cylinder is connected to the first side, the first rod is movably arranged in the first cylinder along the first direction, the first slide is connected to an end of the first rod extending out of the first cylinder, and the first slide is connected to the first leveling block; The second driving mechanism comprises a second cylinder, a second rod and a second slide, the second cylinder is connected to the second side, the second rod is movably arranged in the second cylinder along the first direction, the second slide is connected to an end of the second rod extending out of the second cylinder, and the second slide is connected to the second leveling block; The third driving mechanism includes a third cylinder, a third rod and a third slide. The third cylinder is connected to the second slide. The third rod is movably arranged in the third cylinder along the first direction. The third slide is connected to one end of the third rod extending out of the third cylinder, and the third slide is connected to the second test probe.
9. The OCV testing device according to claim 8, characterized in that: The OCV testing device also includes a first connecting plate, a second connecting plate and a third connecting plate; One end of the first connecting plate is connected to the first slide, and the other end of the first connecting plate protrudes outwards along the third direction toward a side away from the seat body and is connected to the first leveling block; One end of the second connecting plate is connected to the second slide, and the other end of the second connecting plate extends along the third direction toward a side close to the first leveling block and is connected to the second leveling block; One end of the third connecting plate is connected to the third slide table, and the other end of the third connecting plate extends along the third direction toward a side close to the first leveling block and is connected to the second test probe.
10. The OCV testing device according to claim 9, characterized in that: Along the first direction, a side surface of the first leveling block close to the second leveling block protrudes from a side surface of the first connecting plate close to the second leveling block, and a side surface of the second leveling block close to the first leveling block protrudes from a side surface of the second connecting plate close to the first leveling block.