Battery cell clamp and pole test device

Abstract

The utility model belongs to battery technical field discloses a kind of battery cell clamp and pole testing device, battery cell clamp includes support assembly, first clamping part, third clamping part and two second clamping parts, support assembly includes support and first side plate, second side plate and two third side plates that are connected with support and are enclosed to form accommodating space, first side plate and second side plate are oppositely arranged along first direction, two third side plates are oppositely arranged along second direction, first direction is perpendicular with second direction and is parallel with horizontal plane, battery cell can be placed on support and be located in accommodating space, first clamping part and two second clamping parts are located in accommodating space, first clamping part is movably connected with first side plate and can be cooperated with first side plate and first side plate clamps battery cell, each second clamping part is movably connected with corresponding one third side plate, two second clamping parts can cooperate and clamp battery cell, third clamping part can be cooperated with support and clamp battery cell in vertical direction, to realize the effective fixation to battery cell.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a cell clamp and terminal testing device. Background Technology

[0002] Tensile and torsion tests on battery cell terminals are mainly used to evaluate the reliability and durability of terminals in actual use. They are a very important part of the battery cell manufacturing and testing process. Studying the tensile and torsion test data of terminals helps to discover and improve the design and manufacturing processes of battery cell terminals, thereby helping to extend the service life of the battery cell and improve its reliability.

[0003] When performing tensile and torsional tests on the electrode, the battery cell needs to be fixed, and then tensile and torsional stresses are applied to the electrode to measure its deformation and strength under different stress conditions. However, the existing technology lacks a suitable battery cell fixing device, which makes the battery cell prone to displacement during tensile and torsional tests, thus reducing the accuracy of the electrode tensile and torsional tests.

[0004] Therefore, there is an urgent need to propose a cell clamp and electrode testing device to solve the above-mentioned technical problems. Utility Model Content

[0005] The first objective of this invention is to provide a battery cell clamp that can effectively fix the battery cell, thereby reducing the probability of displacement of the battery cell when performing tensile and torsional tests on the terminals of the battery cell, and ensuring the accuracy of the test.

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

[0007] Battery cell clamps, including:

[0008] The support assembly includes a support, a first side plate, a second side plate, and two third side plates. The first side plate and the second side plate are arranged opposite each other in a first direction, and the two third side plates are arranged opposite each other in a second direction. The first direction and the second direction are perpendicular to each other and are both parallel to the horizontal plane. The first side plate, the second side plate, and the two third side plates are all connected to the support and enclose a receiving space. The battery cell can be placed on the support and located within the receiving space.

[0009] The first clamping member is located within the receiving space. The first clamping member is movably connected to the first side plate and can cooperate with the second side plate to clamp the battery cell.

[0010] Two second clamping members are located within the receiving space. Each second clamping member is movably connected to a corresponding third side plate. The two second clamping members can cooperate to clamp the battery cell.

[0011] The third clamping element is used to clamp the battery cell vertically in conjunction with the support.

[0012] Optionally, the battery cell clamp also includes a first adjusting rod, which has a first external thread and a first internal thread on the first side plate. The first external thread and the first internal thread are threadedly engaged, and one end of the first adjusting rod is located in the receiving space and connected to the first clamping member.

[0013] Optionally, the cell clamp also includes two second adjusting rods, two third side plates and two second clamping members corresponding to each other. The second adjusting rods are provided with second external threads and the third side plates are provided with second internal threads. The second external thread of each second adjusting rod is threadedly engaged with the second internal thread of a corresponding third side plate. One end of each second adjusting rod is located in the receiving space and is connected to a corresponding second clamping member.

[0014] Optionally, the cell clamp also includes a connecting block, which is connected to the side of the support away from the receiving space, and the connecting block is used to connect to the bracket of the electrode test device.

[0015] Optionally, the cell clamp also includes a third adjusting rod, and the third clamping member is movably connected to at least one of the support, the first side plate, the second side plate and the two third side plates through the third adjusting rod, so that the third clamping member can move in the vertical direction and can cooperate with the support to clamp the cell in the vertical direction.

[0016] Optionally, there may be two or more third adjusting rods, which are distributed on opposite sides of the third clamping member in the first direction, and / or, the two or more third adjusting rods are distributed on opposite sides of the third clamping member in the second direction.

[0017] Optionally, the two sides of the battery cell opposite each other in the first direction are a first sidewall and a second sidewall, respectively. The first sidewall is provided with a pole post assembly. The second sidewall includes a sidewall body and a clamping block. The sidewall body is connected to a support, and the clamping block is connected to the sidewall body. In the first direction, the clamping block protrudes from the sidewall body in the direction toward the receiving space. The clamping block is configured to abut against the first sidewall, and the first clamping member is configured to abut against the second sidewall.

[0018] Optionally, the support includes a support plate and a pad. The first side plate, the side plate body, and the two third side plates are all connected to the support plate. The pad is connected to the side of the support plate facing the receiving space. The distance between the side of the pad away from the support plate and the side of the support plate facing the receiving space is a. The battery cell can be placed on the pad. The minimum distance between the pole assembly and the side of the support plate facing the receiving space is b, where a > b.

[0019] Optionally, a first recess is provided on the side of the side plate body facing the receiving space, and the first recess is used to receive the pole assembly.

[0020] The second objective of this invention is to provide a terminal testing device that can reliably clamp and fix the battery cell when performing tensile and / or torsion tests on the terminals of the battery cell, thereby reducing the probability of displacement of the battery cell and improving the testing accuracy.

[0021] To achieve this objective, the present invention adopts the following technical solution:

[0022] The electrode testing device includes a frame, a strength testing unit, and the aforementioned cell clamp, with the support mounted on the frame;

[0023] The strength testing unit includes a clamping tensile element, which is used to clamp the terminal assembly on the battery cell and apply tensile stress to the terminal assembly;

[0024] And / or, the strength test unit includes a torsion element for applying torsional stress to the terminal assembly on the cell.

[0025] The beneficial effects of this utility model are:

[0026] The battery cell clamp provided by this utility model has a first clamping member and two second clamping members located within an accommodating space. The first clamping member is movably connected to a first side plate so that it can cooperate with the second side plate to clamp the battery cell in a first direction. Each second clamping member is movably connected to a corresponding third side plate so that the two second clamping members can cooperate to clamp the battery cell in a second direction. The first and second directions are perpendicular to each other and both are parallel to the horizontal plane. The third clamping member can cooperate with the support to clamp the battery cell in the vertical direction. Thus, the battery cell is clamped and fixed in the vertical direction and in two mutually perpendicular horizontal directions, achieving effective fixation of the battery cell. When performing tensile and torsional tests on the electrode posts on the battery cell, the probability of battery cell displacement is low, which improves the accuracy of electrode post tensile and torsional tests. Attached Figure Description

[0027] Figure 1 This is an exploded structural diagram of the battery cell clamp provided in Embodiment 1 of this utility model;

[0028] Figure 2 This is a schematic diagram of the battery cell clamp provided in Embodiment 1 of this utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the battery cell clamp provided in Embodiment 1 of this utility model when clamping the battery cell;

[0030] Figure 4 This is a schematic diagram of the side plate body provided in Embodiment 1 of this utility model;

[0031] Figure 5 This is a schematic diagram of the assembly structure of the battery cell clamp and the battery cell provided in Embodiment 1 of this utility model;

[0032] Figure 6 This is a schematic diagram of the pole testing device provided in Embodiment 1 of this utility model;

[0033] Figure 7 This is a schematic diagram of the assembly structure of the battery cell clamp and the battery cell provided in Embodiment 2 of this utility model;

[0034] Figure 8 This is a schematic diagram of the side plate body provided in Embodiment 2 of this utility model;

[0035] Figure 9 This is a schematic diagram of the structure of the battery cell clamp provided in Embodiment 2 of this utility model when clamping the battery cell;

[0036] Figure 10 This is a schematic diagram of the pole testing device provided in Embodiment 3 of this utility model.

[0037] In the picture:

[0038] D1, First Direction; D2, Second Direction; D3, Third Direction;

[0039] 11. Support; 111. Support plate; 112. Pad block; 12. First side plate; 13. Second side plate; 131. Side plate body; 1311. First clearance groove; 1312. Assembly groove; 132. Clamping block; 14. Third side plate; 141. Second clearance groove; 15. Accommodation space; 2. Battery cell; 21. First side wall; 22. Terminal assembly; 221. Terminal; 222. Bar plate; 31. First clamping element; 32. First adjusting rod; 41. Second clamping element; 42. Second adjusting rod; 51. Third clamping element; 52. Third adjusting rod; 6. Connecting block; 61. First pin hole; 71. Clamping tension element; 72. Torsion element. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0041] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0044] Example 1

[0045] This embodiment provides a battery cell clamp that can effectively fix the battery cell, especially square battery cells. This reduces the probability of displacement of the battery cell when performing tensile and torsional tests on the terminals of the battery cell, thus ensuring the accuracy of the test.

[0046] Specifically, such as Figures 1 to 3As shown, the battery cell clamp includes a support assembly, a first clamping member 31, a third clamping member 51, and two second clamping members 41. The support assembly includes a support 11, a first side plate 12, a second side plate 13, and two third side plates 14. The first side plate 12 and the second side plate 13 are arranged opposite each other in a first direction D1, and the two third side plates 14 are arranged opposite each other in a second direction D2. The first direction D1 and the second direction D2 are perpendicular to each other and both are parallel to the horizontal plane. The first side plate 12, the second side plate 13, and the two third side plates 14 are all connected to the support 11 and enclose each other to form a clamping device. The housing space 15 allows the battery cell 2 to be placed on the support 11 and located within the housing space 15. The first clamping member 31 is located within the housing space 15 and is movably connected to the first side plate 12. It can also cooperate with the second side plate 13 to clamp the battery cell 2. Both second clamping members 41 are located within the housing space 15. Each second clamping member 41 is movably connected to a corresponding third side plate 14. The two second clamping members 41 can cooperate to clamp the battery cell 2. The third clamping member 51 is used to cooperate with the support 11 to clamp the battery cell 2 in the vertical direction (i.e., the third direction D3 in the figure).

[0047] Based on the above design, the first clamping member 31 and the two second clamping members 41 are all located within the accommodating space 15. The first clamping member 31 is movably connected to the first side plate 12 so that the first clamping member 31 can cooperate with the second side plate 13 to clamp the battery cell 2 in the first direction D1. Each second clamping member 41 is movably connected to a corresponding third side plate 14 so that the two second clamping members 41 can cooperate to clamp the battery cell 2 in the second direction D2. The first direction D1 and the second direction D2 are perpendicular to each other, and both the first direction D1 and the second direction D2 are parallel to the horizontal plane. The third clamping member 51 can cooperate with the support 11 to clamp the battery cell 2 in the vertical direction. Thus, the battery cell 2 is clamped and fixed in the vertical direction and in the two mutually perpendicular horizontal directions, achieving effective fixation of the battery cell 2.

[0048] When performing a tensile test on the terminal post 221 on the battery cell 2, the clamping tensile element 71, such as the chuck of the tensile testing machine, is used to clamp the tab 222 that is welded and fixed to the terminal post 221. Then, a tensile force is applied to the tab 222, and the tab 222 transmits the tensile stress to the terminal post 221 to perform a tensile test on the terminal post 221. At this time, the battery cell 2 is clamped and fixed by the battery cell fixture, which can avoid the problem of displacement of the battery cell 2 during the process, thereby improving the accuracy of the tensile test of the terminal post 221.

[0049] When performing a torsion test on the terminal post 221 on the battery cell 2, a torsion element 72, such as a pressure block of a tensile testing machine, is used to apply torsional stress to the plate 222. The plate 222 then transmits this torsional stress to the terminal post 221 to perform a torsion test on the terminal post 221. At this time, the battery cell 2 is clamped and fixed by the battery cell fixture, which can avoid the problem of displacement of the battery cell 2 during the process, thereby improving the accuracy of the torsion test of the terminal post 221.

[0050] Furthermore, the two second clamping members 41 are arranged opposite each other in the second direction D2 to clamp two opposite areas of the battery cell 2 in the second direction D2, thereby improving the stability of the two second clamping members 41 clamping the battery cell 2.

[0051] Optionally, the battery cell clamp also includes a first adjusting rod 32. The first adjusting rod 32 is provided with a first external thread, and the first side plate 12 is provided with a first internal thread. The first external thread and the first internal thread are threadedly engaged. One end of the first adjusting rod 32 is located in the receiving space 15 and connected to the first clamping member 31. By turning the first adjusting rod 32, the position of the first clamping member 31 in the receiving space 15 can be adjusted along the first direction D1, thereby adjusting the distance between the first clamping member 31 and the second side plate 13 in the first direction D1, so as to clamp the battery cell 2 in the first direction D1. In addition, this structure can make the battery cell clamp adaptable to battery cells 2 of different sizes in the first direction D1. When the size of the battery cell 2 in the first direction D1 is large, the first adjusting rod 32 can be turned to increase the distance between the first clamping member 31 and the second side plate 13. When the size of the battery cell 2 in the first direction D1 is small, the first adjusting rod 32 can be turned to decrease the distance between the first clamping member 31 and the second side plate 13.

[0052] In this embodiment, a first nut is provided on the first side plate 12, and the first internal thread is the internal thread on the first nut. Of course, in other embodiments, a first threaded hole can also be opened on the first side plate 12 to form the aforementioned first internal thread.

[0053] Furthermore, the end of the first adjusting rod 32 opposite to the first clamping member 31 is located on the side of the first side plate 12 opposite to the receiving space 15, so that the first adjusting member can be screwed on the side of the first side plate 12 opposite to the receiving space 15.

[0054] In another embodiment, the first clamping member 31 is movably connected to the first side plate 12 via a first electric telescopic rod. Specifically, the fixed end of the first electric telescopic rod is connected to the side of the first side plate 12 facing the receiving space 15, and the movable end of the first electric telescopic rod is connected to the first clamping member 31. The extension and retraction of the movable end of the first electric telescopic rod drives the first clamping member 31 to move in the direction toward and away from the second side plate 13, so as to clamp and release the battery cell 2 in the first direction D1.

[0055] Optionally, the cell clamp also includes two second adjusting rods 42, with the two second adjusting rods 42, two third side plates 14, and two second clamping members 41 corresponding one-to-one. The second adjusting rods 42 are provided with second external threads, and the third side plates 14 are provided with second internal threads. The second external thread of each second adjusting rod 42 is threaded into the second internal thread of a corresponding third side plate 14. One end of each second adjusting rod 42 is located within the receiving space 15 and is connected to a corresponding second clamping member 41. Twisting the second adjusting rods 42 allows the two second clamping members 41 to be adjusted along the second direction D2. 1. Position within the accommodating space 15, thereby adjusting the distance between the two second clamping members 41 in the second direction D2 to clamp the battery cell 2 in the second direction D2. In addition, this structure allows the battery cell clamp to adapt to battery cells 2 of different sizes in the second direction D2. When the size of the battery cell 2 in the second direction D2 is large, one or two second adjusting rods 42 can be turned to increase the distance between the two second clamping members 41. When the size of the battery cell 2 in the second direction D2 is small, one or two second adjusting rods 42 can be turned to decrease the distance between the two second clamping members 41.

[0056] In this embodiment, each third side plate 14 is provided with a second nut, and the second internal thread is the internal thread on the second nut. Of course, in other embodiments, a second threaded hole can also be opened on each third side plate 14 to form the above-mentioned second internal thread.

[0057] Furthermore, one end of the second adjusting rod 42 away from the second clamping member 41 is located on the side of the third side plate 14 away from the receiving space 15, so that the second adjusting member can be screwed on the side of the third side plate 14 away from the receiving space 15.

[0058] In another embodiment, the second clamping member 41 is movably connected to the third side plate 14 via the second electric telescopic rod. Specifically, the fixed end of the second electric telescopic rod is connected to the side of the third side plate 14 facing the receiving space 15, and the movable end of the second electric telescopic rod is connected to the second clamping member 41. The extension and retraction of the movable end of the second electric telescopic rod drives the second clamping member 41 to move in the direction towards and away from the receiving hole, so as to clamp and release the battery cell 2 in the second direction D2.

[0059] Optionally, the cell clamp also includes a connecting block 6, which is connected to the side of the support 11 away from the receiving space 15. The connecting block 6 is used to connect to the bracket of the electrode test device (not shown in the figure) to realize the connection between the cell clamp and the electrode test device bracket.

[0060] Furthermore, the connecting block 6 can be detachably connected to the bracket to facilitate the assembly and disassembly of the cell clamp and the bracket.

[0061] Furthermore, the connecting block 6 is provided with a first pin hole 61, the bracket is provided with a second pin hole, and the battery cell clamp also includes a pin shaft (not shown in the figure). The pin shaft is detachably inserted into the first pin hole 61 and the second pin hole to realize the detachable connection between the connecting block 6 and the bracket.

[0062] Optionally, the battery cell clamp also includes a third adjusting rod 52, and the third clamping member 51 is movably connected to at least one of the support 11, the first side plate 12, the second side plate 13 and the two third side plates 14 through the third adjusting rod 52, so that the third clamping member 51 can move in the vertical direction and can cooperate with the support 11 to clamp the battery cell 2 in the vertical direction.

[0063] In another embodiment, the third adjusting rod 52 can also be omitted. When it is necessary to make the third clamping member 51 cooperate with the support 11 to clamp the battery cell 2, the third clamping member 51 is placed on the side of the battery cell 2 away from the support 11, and then pressure is applied to the side of the third clamping member 51 away from the battery cell 2 (by placing a heavy object or using a clamping element to apply a clamping force towards the support 11 to the third clamping member 51) so that the third clamping member 51 cooperates with the support 11 to clamp the battery cell 2 in the vertical direction.

[0064] Furthermore, the number of third adjusting rods 52 is two or more. For example, the number of third adjusting rods 52 is two, three or four, etc. The two or more third adjusting rods 52 are distributed on opposite sides of the third clamping member 51 in the second direction D2. When the third clamping member 51 cooperates with the support 11 to clamp the battery cell 2, this structure can improve the uniformity of the force applied by the third clamping member 51 to the battery cell 2, and thus improve the uniformity of the clamping force applied by the third clamping member 51 and the support 11 to the battery cell 2.

[0065] In another embodiment, two or more third adjusting rods 52 are distributed on opposite sides of the third clamping member 51 in the first direction D1 to improve the uniformity of the force applied by the third clamping member 51 to the battery cell 2. In yet another embodiment, a portion of the two or more third adjusting rods 52 are distributed on opposite sides of the third clamping member 51 in the first direction D1, and the remaining portion of the two or more third adjusting rods 52 are distributed on opposite sides of the third clamping member 51 in the second direction D2.

[0066] Furthermore, the number of third adjusting rods 52 is even. For example, the number of third adjusting rods 52 can be two, four, or six, etc. The even number of third adjusting rods 52 are grouped in pairs, and multiple groups of third adjusting rods 52 are evenly distributed along the first direction D1. The two third adjusting rods 52 in each group are arranged opposite each other in the second direction D2, so as to further improve the uniformity of the force applied by the third clamping member 51 to the battery cell 2, and further improve the uniformity of the clamping force applied by the third clamping member 51 and the support 11 to the battery cell 2.

[0067] Optionally, the third clamping member 51 is movably connected to the third side plate 14 via the third adjusting rod 52. Specifically, the third adjusting rod 52 is rotatably connected to the third clamping member 51, and the third adjusting rod 52 is provided with a third external thread. The third side plate 14 is provided with a third internal thread on the side facing the third clamping member 51 (i.e., the top of the third side plate 14). The third external thread and the third internal thread are threadedly engaged. By turning the third adjusting rod 52, the position of the third clamping member 51 can be adjusted vertically, thereby adjusting the distance between the third clamping member 51 and the support 11 in the vertical direction, thus achieving vertical clamping of the battery cell 2. In addition, this structure allows the battery cell clamp to adapt to battery cells 2 of different sizes in the vertical direction. When the size of the battery cell 2 in the vertical direction is large, turning the third adjusting rod 52 can increase the distance between the third clamping member 51 and the support 11. When the size of the battery cell 2 in the vertical direction is small, turning the third adjusting rod 52 can decrease the distance between the third clamping member 51 and the support 11.

[0068] In this embodiment, the third side plate 14 is provided with a third threaded hole on the side facing the third clamping member 51 to form the aforementioned third internal thread. Of course, in other embodiments, a third nut can also be provided on the side of the third side plate 14 facing the third clamping member 51, and the aforementioned third internal thread is the internal thread of the third nut.

[0069] In another embodiment, the support 11 has a third threaded hole on the side facing the third clamping member 51, and the third external thread of the third adjusting rod 52 is threadedly engaged with the third threaded hole on the support 11, so that the third clamping member 51 is movably connected to the support 11 through the third adjusting rod 52. Alternatively, the first side plate 12 has a third threaded hole on the side facing the third clamping member 51, and the third external thread of the third adjusting rod 52 is threadedly engaged with the third threaded hole on the first side plate 12, so that the third clamping member 51 is movably connected to the first side plate 12 through the third adjusting rod 52. Alternatively, the second side plate 13 has a third threaded hole on the side facing the third clamping member 51, and the third external thread of the third adjusting rod 52 is threadedly engaged with the third threaded hole on the second side plate 13, so that the third clamping member 51 is movably connected to the second side plate 13 through the third adjusting rod 52.

[0070] In another embodiment, the third clamping member 51 is movably connected to the third side plate 14 via a third electric telescopic rod. Specifically, the fixed end of the third electric telescopic rod is connected to the side of the third side plate 14 facing the third clamping member 51, and the movable end of the third electric telescopic rod is connected to the third clamping member 51. The extension and retraction of the movable end of the third electric telescopic rod drives the third clamping member 51 to move in the direction toward and away from the support 11 (i.e., up and down), so as to clamp and release the battery cell 2 in the vertical direction.

[0071] In this embodiment, the first adjusting rod 32, the second adjusting rod 42, and the third adjusting rod 52 are all screws. Of course, in other embodiments, the first adjusting rod 32, the second adjusting rod 42, and the third adjusting rod 52 can also be bolts or other components with external threads.

[0072] Optionally, the battery cell 2 has a first sidewall 21 and a second sidewall (not shown in the figure) on opposite sides in the first direction D1. The first sidewall 21 has a protruding electrode assembly 22, which includes an electrode 221 and a tab 222. The electrode 221 protrudes from the first sidewall 21, and the tab 222 is welded and fixed to the end of the electrode 221 away from the battery cell 2. The second sideplate 13 includes a sideplate body 131 and a clamping block 132. The sideplate body 131 is connected to the support 11, and the clamping block... 132 is connected to the side plate body 131. In the first direction D1, the clamping block 132 protrudes from the side plate body 131 in the direction toward the receiving space 15. The clamping block 132 is configured to abut against the first side wall 21, and the first clamping member 31 is configured to abut against the second side wall. When clamping the battery cell 2 in the first direction D1, the battery cell 2 is clamped at the first side wall 21 and the second side wall, rather than the pole assembly 22 and the second side wall, thereby improving the stability and reliability of clamping the battery cell 2.

[0073] Furthermore, such as Figures 1 to 4 As shown, the top of the side panel body 131 is provided with an assembly groove 1312, and the clamping block 132 is disposed in the assembly groove 1312. Of course, in other embodiments, the clamping block 132 may also be connected to the side of the side panel body 131 facing the receiving space 15.

[0074] Optionally, such as Figures 2 to 4 As shown, the side plate body 131 is provided with a first clearance groove 1311 on the side facing the accommodating space 15. The first clearance groove 1311 is used to accommodate the pole post assembly 22, so as to avoid interference between the side plate body 131 and the protruding pole post assembly 22 when the battery cell 2 is clamped in the first direction D1, thus achieving the clearance effect.

[0075] Optionally, such as Figures 1 to 5As shown, the support 11 includes a support plate 111 and a pad 112. The first side plate 12, the side plate body 131, and the two third side plates 14 are all connected to the support plate 111. The pad 112 is connected to the side of the support plate 111 facing the receiving space 15. The distance between the side of the pad 112 away from the support plate 111 and the side of the support plate 111 facing the receiving space 15 is a. The battery cell 2 can be placed on the pad 112. The minimum distance between the pole assembly 22 and the side of the support plate 111 facing the receiving space 15 is b, that is, the minimum distance between the pad 222 and the side of the support plate 111 facing the receiving space 15 is b. Where a > b, so as to avoid the pad 222 of the pole assembly 22 from colliding with the support plate 111, which plays a role in avoiding positioning, so that the battery cell 2 can be placed stably on the pad 112.

[0076] In this embodiment, as Figure 5 As shown, there are two pole post assemblies 22, which are arranged vertically at intervals. A clamping block 132 is located between the two pole post assemblies 22, allowing the area on the first sidewall 21 between the two pole post assemblies 22 to abut against the clamping block 132. The tabs 222 of the two pole post assemblies 22 extend vertically in opposite directions; that is, the upper tab 222 extends upwards, and the lower tab 222 extends downwards. The term 'b' refers to the distance between the side of the lower tab 222 facing the support plate 111 and the side of the support plate 111 facing the receiving space 15. Figure 4 As shown, the first clearance groove 1311 extends vertically and penetrates the bottom wall of the side plate body 131, so that the first clearance groove 1311 can accommodate the bar pieces 222 of different lengths located below, thereby improving the universality of the battery cell clamp.

[0077] This embodiment also provides a pole testing device, such as... Figure 6 As shown, the electrode testing device includes a frame (not shown), a strength testing unit, and the aforementioned cell clamp. The support 11 is mounted on the frame. The strength testing unit includes a clamping tension element 71, which clamps the electrode assembly 22 on the cell 2 and applies tensile stress to the electrode assembly 22. When the electrode testing device uses the aforementioned cell clamp to perform a tensile test on the electrode 221 on the cell 2, the clamping tension element 71 clamps the tab 222 that is welded and fixed to the electrode 221, and then applies a tensile force to the tab 222. In this embodiment, the clamping tension element 71 applies an upward pulling force to the tab 222, and the tab 222 transmits this pulling force to the electrode 221 to perform a tensile test on the electrode 221. At this time, the cell 2 is clamped and fixed by the cell clamp, which can avoid the problem of displacement of the cell 2 during this process, thereby improving the accuracy of the tensile test of the electrode 221.

[0078] In this embodiment, the clamping and stretching element 71 is the chuck of a tensioning machine. Of course, in other embodiments, other structures such as a tension gauge can also apply a tensile force to the bar plate 222, which will not be listed here.

[0079] Example 2

[0080] This embodiment provides a battery cell clamp. The following mainly describes the differences between this embodiment and Embodiment 1, while the similarities will not be repeated.

[0081] like Figure 7 As shown, the tabs 222 of both pole posts 22 extend along the second direction D2. To accommodate the extension direction of the tabs 222, as follows: Figure 8 As shown, the first clearance groove 1311 extends along the second direction D2 and penetrates the two opposite side walls of the side plate body 131 in the second direction D2, so that the first clearance groove 1311 can accommodate the bar pieces 222 of different lengths located below, thereby improving the universality of the battery cell clamp.

[0082] Furthermore, such as Figure 7 and Figure 9 As shown, the third side plate 14 is provided with a second clearance groove 141 on the side facing the side plate body 131. The groove width of the second clearance groove 141 is equal to the groove width of the first clearance groove 1311, and the groove opening of the second clearance groove 141 is set directly opposite the groove opening of the first clearance groove 1311 to accommodate the different thicknesses of the pads 222 located in the first clearance groove 1311 (i.e., pads 222 of different sizes in the first direction D1), further improving the universality of the battery cell clamp.

[0083] Example 3

[0084] This embodiment provides a pole testing device. The following mainly describes the differences between this embodiment and Embodiment 1, while the similarities will not be repeated.

[0085] like Figure 10 As shown, the electrode testing device includes a frame (not shown), a strength testing unit, and the aforementioned cell clamp. The strength testing unit includes a torsion element 72, which is used to apply torsional stress to the electrode assembly 22 on the cell 2. When the electrode testing device uses the aforementioned cell clamp to perform a torsion test on the electrode 221 on the cell 2, the torsion element 72 applies torsional stress to the plate 222. In this embodiment, the torsion element 72 applies a downward force to the plate 222, causing the plate 222 to have a downward rotation tendency. Consequently, the plate 222 applies torsional stress to the electrode 221 to perform a torsion test on the electrode 221. At this time, the cell 2 is clamped and fixed by the cell clamp, which can avoid the problem of displacement of the cell 2 during this process, thereby improving the accuracy of the torsion test of the electrode 221.

[0086] In this embodiment, the torsion element 72 is the pressure block of the tensile testing machine. Of course, in other embodiments, other structures such as torque meters can also apply tensile force to the plate 222, which will not be listed here.

[0087] In another embodiment, the strength testing unit includes a clamping tensile element 71 and a torsion element 72, so that the pole testing device can perform both tensile testing and torsion testing of the pole 221.

[0088] 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 various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments 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 cell clamp, characterized in that, include: The support assembly includes a support (11), a first side plate (12), a second side plate (13), and two third side plates (14). The first side plate (12) and the second side plate (13) are arranged opposite each other in a first direction (D1), and the two third side plates (14) are arranged opposite each other in a second direction (D2). The first direction (D1) and the second direction (D2) are perpendicular to each other and parallel to the horizontal plane. The first side plate (12), the second side plate (13), and the two third side plates (14) are all connected to the support (11) and enclose a receiving space (15). The battery cell (2) can be placed on the support (11) and can be located in the receiving space (15). The first clamping member (31) is located in the receiving space (15). The first clamping member (31) is movably connected to the first side plate (12) and can cooperate with the second side plate (13) to clamp the battery cell (2). Two second clamping members (41) are located in the receiving space (15). Each second clamping member (41) is movably connected to a corresponding third side plate (14). The two second clamping members (41) can cooperate to clamp the battery cell (2). The third clamping member (51) is used to cooperate with the support (11) to clamp the battery cell (2) in the vertical direction.

2. The cell clamp according to claim 1, characterized in that, The battery cell clamp also includes a first adjusting rod (32), which has a first external thread and a first internal thread on the first side plate (12). The first external thread and the first internal thread are threaded together. One end of the first adjusting rod (32) is located in the receiving space (15) and connected to the first clamping member (31).

3. The cell clamp according to claim 1, characterized in that, The battery cell clamp also includes two second adjusting rods (42), the two second adjusting rods (42), the two third side plates (14), and the two second clamping members (41) correspond one-to-one. The second adjusting rods (42) are provided with second external threads, and the third side plates (14) are provided with second internal threads. The second external thread of each second adjusting rod (42) is threadedly engaged with the second internal thread of the corresponding third side plate (14). One end of each second adjusting rod (42) is located in the receiving space (15) and is connected to the corresponding second clamping member (41).

4. The cell clamp according to claim 1, characterized in that, The cell clamp also includes a connecting block (6), which is connected to the side of the support (11) away from the receiving space (15). The connecting block (6) is used to connect to the bracket of the electrode test device.

5. The cell clamp according to any one of claims 1-4, characterized in that, The cell clamp also includes a third adjusting rod (52), and the third clamping member (51) is movably connected to at least one of the support (11), the first side plate (12), the second side plate (13) and the two third side plates (14) through the third adjusting rod (52), so that the third clamping member (51) can move along the vertical direction and cooperate with the support (11) to clamp the cell (2) in the vertical direction.

6. The cell clamp according to claim 5, characterized in that, The number of the third adjusting rods (52) is two or more, and the two or more third adjusting rods (52) are distributed on opposite sides of the third clamping member (51) in the first direction (D1), and / or, the two or more third adjusting rods (52) are distributed on opposite sides of the third clamping member (51) in the second direction (D2).

7. The cell clamp according to any one of claims 1-4, characterized in that, The battery cell (2) has a first sidewall (21) and a second sidewall on opposite sides in the first direction (D1). The first sidewall (21) has a protruding pole assembly (22). The second sideplate (13) includes a sideplate body (131) and a clamping block (132). The sideplate body (131) is connected to the support (11), and the clamping block (132) is connected to the sideplate body (131). In the first direction (D1), the clamping block (132) protrudes from the sideplate body (131) in the direction toward the receiving space (15). The clamping block (132) is configured to abut against the first sidewall (21), and the first clamping member (31) is configured to abut against the second sidewall.

8. The cell clamp according to claim 7, characterized in that, The support (11) includes a support plate (111) and a pad (112). The first side plate (12), the side plate body (131), and the two third side plates (14) are all connected to the support plate (111). The pad (112) is connected to the side of the support plate (111) facing the receiving space (15). The distance between the side of the pad (112) away from the support plate (111) and the side of the support plate (111) facing the receiving space (15) is a. The battery cell (2) can be placed on the pad (112). The minimum distance between the pole assembly (22) and the side of the support plate (111) facing the receiving space (15) is b, where a > b.

9. The cell clamp according to claim 7, characterized in that, The side plate body (131) is provided with a first clearance groove (1311) on the side facing the receiving space (15), and the first clearance groove (1311) is used to receive the pole assembly (22).

10. A pole testing device, characterized in that, It includes a frame, a strength testing unit, and a cell clamp as described in any one of claims 1-9, wherein the support (11) is disposed on the frame; The strength testing unit includes a clamping tensile element (71), which is used to clamp the terminal assembly (22) on the battery cell (2) and apply tensile stress to the terminal assembly (22); And / or, the strength testing unit includes a torsion element (72) for applying torsional stress to the terminal assembly (22) on the cell (2).

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