Transfer clamp for battery cell

Abstract

The utility model relates to a battery cell transfer fixture, including first clamping mechanism and second clamping mechanism, the first clamping mechanism includes first plane clamping portion and first tab shaping portion, the first plane clamping portion is used for clamping one plane of the battery cell, the first tab shaping portion is connected to the first plane clamping portion close to one end of the tab, and the second plane clamping portion is used for clamping the other plane of the battery cell. The second clamping mechanism is used for abutting against one side of the tab and shaping the tab, the second clamping mechanism comprises a second plane clamping part and a second tab shaping part, the second plane clamping part is used for clamping the other plane of the battery cell, and the second tab shaping part is connected to one end, close to the tab, of the second plane clamping part; the shaping device is used for abutting against the other side of the tab and shaping the tab. The transfer clamp can prevent the tabs from being inversely inserted, protect the battery cell and fix and support the battery cell.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a transport fixture for battery cores. Background Art

[0002] Conventional battery production requires winding-hot pressing-Xray-ultrasonic welding-laser welding-core shelling and other processes. During this process, most of the battery cells are in a free state, and no safety protection is added to the surface. That is to say, from the hot pressing of the battery cells to the battery cells being shelled, the battery cells are continuously produced by being transported by robots. During this process, the tabs of the battery cells are in a free state. After the tabs are welded, irregular tab bends are easily formed, causing the risk of inverted tab insertion. In addition, the surface of the battery cells is not well protected, and it is easy to be hit or scratched during the transportation by robots, which has an adverse effect on the safety of the battery cells. Utility Model Content

[0003] To this end, the utility model provides a battery cell transport fixture that can provide more protection for the battery cells and is more conducive to the safety of the battery cells.

[0004] In order to solve the above technical problems, the utility model provides a battery cell transport fixture, comprising:

[0005] A first clamping mechanism, the first clamping mechanism comprising a first planar clamping portion and a first tab shaping portion, the first planar clamping portion being used to clamp at least a portion of a plane of the battery cell, the first tab shaping portion being connected to an end of the first planar clamping portion close to the tab, and being used to abut against one side of the tab and shape the tab;

[0006] The second clamping mechanism includes a second planar clamping portion and a second pole lug shaping portion, the second planar clamping portion is used to clamp at least a partial area of ​​another plane of the battery cell, and the second pole lug shaping portion is connected to one end of the second planar clamping portion close to the pole lug, and is used to abut the other side of the pole lug and shape the pole lug.

[0007] Further, the first pole lug shaping portion has a first vertical surface facing the pole lug, a first end surface facing the top surface of the battery cell, and a first slope surface connecting the first vertical surface and the first end surface and facing the pole lug, the first vertical surface is parallel to the height direction of the battery cell, a convex angle is formed between the first vertical surface and the first slope surface, and the two abut one side of the pole lug, the second pole lug shaping portion has a second vertical surface facing the pole lug, a second end surface facing the top surface of the battery cell, and a second slope surface connecting the second vertical surface and the second end surface and facing the pole lug, the second vertical surface is parallel to the height direction of the battery cell, a concave angle is formed between the second vertical surface and the second slope surface, and the two abut the other side of the pole lug.

[0008] Furthermore, the first slope surface and the first end surface are transitionally connected via a first fillet, the second slope surface and the second end surface are transitionally connected via a second fillet, and the radius of the first fillet is smaller than the radius of the second fillet.

[0009] Furthermore, the angle between the first slope and the height direction of the battery cell is 45-80 degrees, and the angle between the second slope and the height direction of the battery cell is 45-80 degrees.

[0010] Furthermore, a certain distance is between the first end surface and the top surface of the battery cell, and a certain distance is between the second end surface and the top surface of the battery cell.

[0011] Furthermore, the first pole tab shaping portion and the second pole tab shaping portion abut against each other to form a top surface shielding portion that exposes the position of the pole tab and shields the top surface of the battery cell.

[0012] Furthermore, the first clamping mechanism further comprises two first side clamping portions, and the two first side clamping portions are respectively connected to two ends of the first plane clamping portion facing the side surface of the battery cell;

[0013] The second clamping mechanism further includes two second side clamping portions, and the two second side clamping portions are respectively connected to two ends of the second plane clamping portion facing the side of the battery cell;

[0014] One of the first tab shaping portion and the second tab shaping portion is provided with a first recessed portion for accommodating the tab, and the other is provided with a first raised portion for positioning with the first recessed portion and pressing the tab into the first recessed portion;

[0015] The first side clamping portion and the second side clamping portion located on the same side of the battery core are snap-connected to each other.

[0016] Furthermore, the transfer fixture further comprises:

[0017] A third clamping mechanism, the third clamping mechanism comprising a third planar clamping portion, the third planar clamping portion and the first planar clamping portion are used to clamp the same plane of the battery cell, the first clamping mechanism and the third clamping mechanism are respectively close to the top surface and the bottom surface of the battery cell;

[0018] A fourth clamping mechanism, the fourth clamping mechanism comprises a fourth planar clamping portion, the fourth planar clamping portion and the second planar clamping portion are used to clamp the same plane of the battery cell, the second clamping mechanism and the fourth clamping mechanism are respectively close to the top surface and the bottom surface of the battery cell.

[0019] Further, the third clamping mechanism further comprises a first bottom clamping portion and two third side clamping portions, wherein the first bottom clamping portion is connected to one end of the third plane clamping portion facing the bottom surface of the battery cell, and the two third side clamping portions are respectively connected to two ends of the third plane clamping portion facing the side surface of the battery cell;

[0020] The fourth clamping mechanism further includes a second bottom clamping portion and two fourth side clamping portions, wherein the second bottom clamping portion is connected to one end of the fourth plane clamping portion facing the bottom surface of the battery cell, and the two fourth side clamping portions are respectively connected to two ends of the fourth plane clamping portion facing the side surface of the battery cell;

[0021] One of the first bottom surface clamping portion and the second bottom surface clamping portion is provided with a second recessed portion, and the other is provided with a second raised portion for positioning in a concave-convex manner in cooperation with the second recessed portion;

[0022] The third side clamping portion and the fourth side clamping portion located on the same side of the battery core are snap-connected to each other.

[0023] Furthermore, a flexible layer is provided on the surface of the transport fixture that contacts the battery cell (1).

[0024] The above technical solution of the utility model has the following advantages compared with the prior art:

[0025] 1) The battery cell transfer fixture described in the utility model is provided with a first clamping mechanism and a second clamping mechanism. The first clamping mechanism includes a first planar clamping portion and a first pole ear shaping portion, and the second clamping mechanism includes a second planar clamping portion and a second pole ear shaping portion. On the one hand, the first pole ear shaping portion and the second pole ear shaping portion can constrain and shape the pole ears of the battery cell after hot pressing. During ultrasonic welding and laser welding, after the pole ears of the battery cell are constrained, the shape of the pole ears is fixed. In this way, after the battery cell is assembled and the clamp is removed and put into the shell, the shape of the pole ears is fixed regularly, and even if the pole ears are not supported by structural parts, the pole ears will not be reversed. On the other hand, the first planar clamping portion and the second planar clamping portion can protect the two planes of the battery cell. In this way, during the production and transportation of the battery cell, the manipulator will exert a direct force on the transfer fixture to avoid direct damage to the battery cell, thereby improving the safety of the battery cell production. In addition, due to the fixed support of the battery cell by the transfer fixture, the problem of being unable to transfer production due to softening of the battery cell (for example, the battery cell size is too wide) can be avoided;

[0026] 2) The battery cell transport fixture of the utility model, the first tab shaping portion has a first vertical surface, a first end surface and a first slope surface, the second tab shaping portion has a second vertical surface, a second end surface and a second slope surface, the first tab shaping portion and the second tab shaping portion cooperate with each other, and the tab can be gathered and shaped into a set shape;

[0027] 3) The battery cell transport fixture of the utility model provides a first fillet between the first slope and the first end face, and a second fillet between the second slope and the second end face, so as to avoid stress concentration at the bending part of the tab and thus avoid tearing;

[0028] 4) The transport fixture of the battery cell described in the utility model has an angle of 45-80 degrees between the first slope and the second slope and the height direction of the battery cell, so that the bending angle of the tab is not too large to prevent stress concentration;

[0029] 5) The battery cell transport fixture of the utility model has a certain distance between the first end surface and the top surface of the battery cell, and a certain distance between the second end surface and the top surface of the battery cell, so that the tab will not be directly pressed down from the root, and the tab is bent to have deformation space;

[0030] 6) The transfer fixture of the battery cell described in the utility model, the first pole ear shaping part and the second pole ear shaping part are abutted to form a top surface shielding part, so that the top surface side of the battery cell is shielded during the process from hot pressing to shelling of the battery cell, which can prevent the welding slag formed by ultrasonic welding and laser welding from entering the battery cell, causing problems such as poor self-discharge of the battery cell;

[0031] 7) The transport fixture of the battery cell described in the utility model, the first pole ear shaping part and the second pole ear shaping part are positioned in a concave-convex manner, and the pole ear is embedded in the concave part, the first clamping mechanism also includes a first side clamping part, and the second clamping mechanism also includes a second side clamping part. On the one hand, it is convenient for the first clamping mechanism and the second clamping mechanism to position each other and the pole ear to be positioned and bent, and on the other hand, the side of the battery cell can be protected, and it is convenient for the first clamping mechanism and the second clamping mechanism to be connected to each other;

[0032] 8) The battery cell transport fixture of the utility model can clamp battery cells of different heights and save materials by setting the third clamping mechanism and the fourth clamping mechanism, the first clamping mechanism and the second clamping mechanism are close to the top surface of the battery cell, and the third clamping mechanism and the fourth clamping mechanism are close to the bottom surface of the battery cell;

[0033] 9) The battery cell transport fixture of the utility model, the third clamping mechanism further includes a first bottom clamping portion and a third side clamping portion, and the fourth clamping mechanism further includes a second bottom clamping portion and a fourth side clamping portion, which, on the one hand, facilitates mutual positioning of the first clamping mechanism and the second clamping mechanism, and on the other hand, can protect the side and bottom of the battery cell, and facilitates mutual connection of the third clamping mechanism and the fourth clamping mechanism;

[0034] 10) The battery cell transport fixture of the utility model can absorb external forces and protect the battery cells by providing a flexible layer, thereby preventing the battery cells from being hit or crushed, and improving the safety of the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0036] Figure 1 This is a front view of the battery cell (without the transport fixture) of the utility model;

[0037] Figure 2 It is a side view of the battery cell (without the transport fixture) of the utility model;

[0038] Figure 3 This is a front view of the battery cell (with a transfer fixture) in the utility model;

[0039] Figure 4 for Figure 3 Schematic diagram of the cross section of AA;

[0040] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0041] Figure 6 It is a side view of the battery cell (with a transport fixture) in the utility model;

[0042] Figure 7 It is a top view of the battery cell (with a transfer fixture) in the utility model;

[0043] Figure 8 It is a side view of the first clamping mechanism and the second clamping mechanism in the utility model;

[0044] Fig. 9 It is a top view of the first clamping mechanism and the second clamping mechanism in the utility model;

[0045] Fig.10 A bottom view of the first clamping mechanism and the second clamping mechanism in the utility model;

[0046] Fig.11 This is a process flow chart of the production of the battery cell in the utility model;

[0047] Fig.12 It is a schematic diagram of the battery cells after being combined in the utility model.

[0048] Description of the accompanying drawings: 1, battery cell; 111, plane; 112, top surface; 113, side surface; 114, bottom surface; 12, pole ear;

[0049] 2. first clamping mechanism; 21. first plane clamping portion; 22. first tab shaping portion; 221. first vertical surface; 222. first end surface; 223. first slope surface; 224. first protrusion; 23. first side clamping portion; 231. first buckle hole;

[0050] 3. Second clamping mechanism; 31. Second plane clamping portion; 32. Second tab shaping portion; 321. Second vertical surface; 322. Second end surface; 323. Second slope surface; 324. First recessed portion; 33. Second side clamping portion; 331. First buckle protrusion;

[0051] 4. third clamping mechanism; 41. third plane clamping portion; 42. first bottom clamping portion; 43. third side clamping portion;

[0052] 5. Fourth clamping mechanism; 51. Fourth plane clamping portion; 52. Second bottom clamping portion; 53. Fourth side clamping portion;

[0053] 6. Flexible layer; 7. Adapter; 8. Top cover; 9. Pole. DETAILED DESCRIPTION

[0054] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0055] See also Figures 1 to 12 As shown, an embodiment of a battery cell transport fixture provided by the utility model.

[0056] The battery cell 1 is mainly made of a positive electrode sheet, a negative electrode sheet and a separator, and the separator is arranged between the positive electrode sheet and the negative electrode sheet to prevent the positive electrode sheet and the negative electrode sheet from contacting and short-circuiting. A tab 12 is led out from one end of the battery cell 1, and the positive tab is connected to the positive electrode sheet, and the negative tab is connected to the negative electrode sheet.

[0057] The current battery cells mainly include stacked type, wound flattened type and cylindrical type.

[0058] The battery cell of the stacked battery cell is formed by cutting the electrode sheets and the diaphragm into sheets and then stacking them. The length direction, height direction and thickness direction of the battery cell are perpendicular to each other. The thickness direction of the battery cell is the stacking direction of the electrode sheets and the diaphragm. The battery cell has two opposite planes (also called large surfaces) in the thickness direction, the battery cell has opposite top and bottom surfaces in the height direction, and the battery cell has two opposite side surfaces in the length direction. The electrode ears are led out from the top surface of the battery cell.

[0059] The wound flattened battery cell is formed by stacking strip-shaped pole pieces and diaphragms, winding them into a column, and then flattening them radially. The length, height and thickness directions of the battery cell are perpendicular to each other. The thickness direction of the battery cell is the flattening direction of the battery cell, and the height direction of the battery cell is the axial direction of the battery cell before flattening. The battery cell has two opposite planes (also called large surfaces) in the thickness direction, the battery cell has opposite top and bottom surfaces in the height direction, and the battery cell has two opposite side surfaces in the length direction. The pole ears are led out from the top surface of the battery cell.

[0060] The cylindrical battery cell is formed by stacking and winding strip-shaped pole pieces and separators. The height direction of the battery cell is its axial direction. The battery cell has opposite top and bottom surfaces in the height direction, and the pole ears are led out from the top surface of the battery cell.

[0061] The transfer fixture of the utility model is mainly suitable for stacked cell batteries and wound flattened cell batteries, both of which have two opposite planes, opposite top and bottom surfaces, and opposite side surfaces.

[0062] The above-mentioned transfer fixture includes:

[0063] A first clamping mechanism 2, the first clamping mechanism 2 comprising a first planar clamping portion 21 and a first pole lug shaping portion 22, the first planar clamping portion 21 being used to clamp at least a portion of a plane 111 of the battery cell 1, the first pole lug shaping portion 22 being connected to an end of the first planar clamping portion 21 close to the pole lug 12, and being used to abut against one side of the pole lug 12 and shape the pole lug 12;

[0064] The second clamping mechanism 3 includes a second planar clamping portion 31 and a second pole lug shaping portion 32. The second planar clamping portion 31 is used to clamp at least a portion of another plane 111 of the battery cell 1. The second pole lug shaping portion 32 is connected to one end of the second planar clamping portion 31 close to the pole lug 12, and is used to abut the other side of the pole lug 12 and shape the pole lug 12.

[0065] The first planar clamping portion 21 and the second planar clamping portion 31 are arranged opposite to each other, and the two clamp the battery cell 1 along the thickness direction of the battery cell 1. The surface of the first planar clamping portion 21 in contact with the battery cell 1 is a plane, and the surface of the second planar clamping portion 31 in contact with the battery cell 1 is a plane, so that the force is uniform at all parts of the battery cell. Specifically, the first planar clamping portion 21 and the second planar clamping portion 31 can be set as a clamping plate, and the clamping plate can be set as a non-hollowed-out plate or a partially hollowed-out plate, as long as it can clamp the battery cell and ensure that the battery cell will not be deformed. The first pole ear shaping portion 22 and the second pole ear shaping portion 32 are respectively arranged on both sides of the stacking direction of the pole ear 12, and the first pole ear shaping portion 22 and the second pole ear shaping portion 32 apply a certain pressure to the pole ear, so that the pole ear is close together and deformed according to the set shape.

[0066] In the prior art, the process from hot pressing to shelling of batteries generally includes the following steps: hot pressing → X-ray → ultrasonic welding → laser welding → core assembly and encapsulation → shelling. After hot pressing, the tabs of the battery cell are in a free state. If the tabs are not restrained and fixed, the bending of the tabs will change irregularly. If they are assembled into the shell in this way, the tabs are prone to reverse insertion, thus posing a safety hazard.

[0067] In the utility model, after the hot pressing process, a transfer fixture assembly process is added, and the battery cell is clamped by the transfer fixture to protect the battery cell. Before the core assembly and encapsulation process, a transfer fixture disassembly process is added to separate the transfer fixture that has completed its mission from the battery cell, and then the transfer fixture is reused. Specifically, in the utility model, the battery from hot pressing to shelling includes the following processes in sequence: hot pressing → transfer fixture assembly → Xray → ultrasonic welding → laser welding → transfer fixture removal → core assembly and encapsulation → shelling. The battery cell after hot pressing is bound and fixed by the transfer fixture, and the tab is fixedly bent due to the fixture. In this way, even if the fixture is separated from the battery cell, the tab still maintains the bending when bound. After the battery cell is shelled, even if the tab is not supported by special structural parts, the tab can maintain regular bending without inverted insertion. During the transfer process, the manipulator will apply force to the transfer clamp, specifically to the first plane clamping part and the second plane clamping part. To ensure that the manipulator has enough space to clamp the clamp, the size of the transfer clamp in the direction of the battery cell height must not be less than 10mm. The upper limit value is related to the battery cell height. The larger the battery cell height, the larger the size of the transfer clamp in the direction of the battery cell height.

[0068] Through the above technical solution, on the one hand, the first tab shaping part and the second tab shaping part can constrain and shape the tabs of the battery cell after hot pressing. During ultrasonic welding and laser welding, after the tabs of the battery cell are constrained, the shape of the tabs is fixed. In this way, after the battery cell is assembled and the fixture is removed and put into the shell, the shape of the tabs is fixed regularly, and the tabs will not be reversed even if the tabs are not supported by structural parts; on the other hand, the first plane clamping part and the second plane clamping part can protect the two planes of the battery cell. In this way, during the production and transportation of the battery cell, the manipulator will exert a direct force on the transportation fixture to avoid direct damage to the battery cell, thereby improving the safety of battery cell production. In addition, due to the fixed support of the battery cell by the transportation fixture, the problem of being unable to transport and produce because the battery cell is soft (for example, the battery cell size is too wide) can be avoided.

[0069] In a preferred implementation manner in this embodiment, the first pole lug shaping portion 22 has a first vertical surface 221 facing the pole lug 12, a first end surface 222 facing the top surface of the battery cell 1, and a first slope surface 223 connecting the first vertical surface 221 and the first end surface 222 and facing the pole lug 12, the first vertical surface 221 is parallel to the height direction of the battery cell 1, a convex angle is formed between the first vertical surface 221 and the first slope surface 223, and the two abut one side of the pole lug 12, the second pole lug shaping portion 32 has a second vertical surface 321 facing the pole lug 12, a second end surface 322 facing the top surface of the battery cell 1, and a second slope surface 323 connecting the second vertical surface 321 and the second end surface 322 and facing the pole lug 12, the second vertical surface 321 is parallel to the height direction of the battery cell 1, a concave angle is formed between the second vertical surface 321 and the second slope surface 323, and the two abut the other side of the pole lug 12.

[0070] The first vertical surface 221 is opposite to the second vertical surface 321, the first slope surface 223 is opposite to the second slope surface 323, the convex angle formed between the first vertical surface 221 and the first slope surface 223 means that the angle between the first vertical surface 221 and the first slope surface 223 is greater than 180 degrees, and the concave angle formed between the second vertical surface 321 and the second slope surface 323 means that the angle between the second vertical surface 321 and the second slope surface is less than 180 degrees. The sum of the convex angle and the concave angle is approximately 360 degrees. When the first clamping mechanism 2 and the second clamping mechanism 3 clamp the battery cell 1, a gap is formed between the first pole ear shaping portion 22 and the second pole ear shaping portion 32, and the gap is the same as the shape of the pole ear 12 after bending, and the pole ear 12 is bound and shaped. Through the above technical solution, the pole ear 12 can be bent into a set shape.

[0071] In the preferred implementation manner of this embodiment, the first slope surface 223 and the first end surface 222 are connected via a first fillet transition, and the second slope surface 323 and the second end surface 322 are connected via a second fillet transition, and the radius of the first fillet is smaller than the radius of the second fillet.

[0072] Since there is a first corner between the first slope 223 and the first end face 222, and a second corner between the second slope 323 and the second end face 322, the first corner and the second corner will both abut the pole ear. If the first corner and the second corner are sharp corners, stress concentration will occur on the pole ear, causing the pole ear to tear. If the first corner and the second corner are rounded corners, the stress concentration on the pole ear can be greatly alleviated. Specifically, the first rounded corner is R1, and the radius of R1 is 0.5-1mm, and the second rounded corner is R2, and the radius of R2 is 0.1-0.5mm. Through the above technical solution, stress concentration at the bending point of the pole ear can be avoided, which can avoid tearing.

[0073] In a preferred implementation manner of this embodiment, the angle between the first slope 223 and the height direction of the battery cell 1 is 45-80 degrees, and the angle between the second slope 323 and the height direction of the battery cell 1 is 45-80 degrees.

[0074] The angle between the first slope 223 and the second slope 323 and the height direction of the battery cell 1 is α, α is 45, 50, 55, 60, 65, 70, 75 or 80 degrees, and the size of the first slope and the second slope along the height direction of the battery cell is L1, L1 is 1-2mm. Through the above technical solution, the bending angle of the tab will not be too large, thereby preventing the tab stress concentration.

[0075] In a preferred implementation manner of the present embodiment, a certain distance is provided between the first end surface 222 and the top surface of the battery cell 1 , and a certain distance is provided between the second end surface 322 and the top surface of the battery cell 1 .

[0076] If there is no gap between the first end face 222 and the top face 112 of the battery cell 1, part of the tab 12 will be bent from the root, causing the tab to rupture. There is a certain distance between the first end face 222 and the top face 112 of the battery cell 1. Specifically, the distance between the first end face 222 and the top face 112 of the battery cell 1 is L2, L2 = 0-1mm, so that the tab will not be directly crushed from the root, and there is room for the tab to bend and deform.

[0077] In a preferred implementation manner of the present embodiment, the first electrode tab shaping portion 22 and the second electrode tab shaping portion 32 abut against each other to form a shielding portion that exposes the electrode tab 12 and shields the top surface of the battery cell 1 .

[0078] After the battery cell is assembled with the transfer fixture, except for the exposed pole ear, the other parts of the top surface of the battery cell 1 are covered and shielded by the first pole ear shaping portion 22 and the second pole ear shaping portion 32. Through the above technical scheme, during the process from hot pressing to shelling of the battery cell 1, the top surface 112 side of the battery cell 1 is shielded, which can prevent welding slag formed by ultrasonic welding and laser welding from entering the interior of the battery cell 1 and causing problems such as poor self-discharge of the battery cell 1.

[0079] In a preferred implementation manner of this embodiment, the first clamping mechanism 2 further includes two first side clamping portions 23, and the two first side clamping portions 23 are respectively connected to two ends of the first plane clamping portion 21 facing the side of the battery cell 1;

[0080] The second clamping mechanism 3 further includes two second side clamping portions 33, and the two second side clamping portions 33 are respectively connected to two ends of the second plane clamping portion 31 facing the side of the battery cell 1;

[0081] One of the first tab shaping portion 22 and the second tab shaping portion 32 is provided with a first recessed portion 324 for embedding the tab 12, and the other is provided with a first raised portion 224 which is positioned in a concave-convex manner with the first recessed portion 324 and presses the tab 12 into the first recessed portion 324;

[0082] The first side clamping portion 23 and the second side clamping portion 33 located on the same side of the battery core 1 are connected together by snapping.

[0083] The first raised portion 224 is a convex ridge, and the ridge top of the convex ridge is provided with the first vertical surface 221 and the first slope surface 223. The first recessed portion 324 is a groove, and the groove bottom of the groove is provided with the second vertical surface 321 and the second slope surface 323. The first side clamping portion 23 and the second side clamping portion 33 located on the same side of the battery cell 1, one of which is provided with a first snap hole 231, and the other is provided with a first snap convex point 331, and the first clamping mechanism 2 and the second clamping mechanism 3 are snapped together through the first snap hole 231 and the first snap convex point 331. The first clamping mechanism and the second clamping mechanism are assembled in a two-piece snap-fit ​​manner. When the transport fixture is installed, the snap convex point of the first clamping mechanism will be matched and snapped with the snap hole of the second clamping mechanism. When the fixture is to be removed, it is only necessary to apply force to the snap convex point to push it out of the snap hole to disassemble. Through the above technical solution, on the one hand, it is convenient to position the first clamping mechanism and the second clamping mechanism relative to each other and to position and bend the pole ear; on the other hand, it can protect the side of the battery cell and facilitate the mutual connection between the first clamping mechanism and the second clamping mechanism.

[0084] In the preferred implementation mode of this embodiment, the above-mentioned transfer fixture further includes:

[0085] A third clamping mechanism 4, the third clamping mechanism 4 comprises a third planar clamping portion 41, the third planar clamping portion 41 and the first planar clamping portion 21 are used to clamp the same plane of the battery cell 1, the first clamping mechanism 2 and the third clamping mechanism 4 are respectively close to the top surface and the bottom surface of the battery cell 1;

[0086] The fourth clamping mechanism 5 includes a fourth planar clamping portion 51. The fourth planar clamping portion 51 and the second planar clamping portion 31 are used to clamp the same plane of the battery cell 1. The second clamping mechanism 3 and the fourth clamping mechanism 5 are respectively close to the top and bottom surfaces of the battery cell.

[0087] The third planar clamping portion 41 and the fourth planar clamping portion 51 are arranged opposite to each other, and the two clamp the battery cell 1 along the thickness direction of the battery cell 1. The surface of the third planar clamping portion 41 in contact with the battery cell 1 is a plane, and the surface of the fourth planar clamping portion 51 in contact with the battery cell 1 is a plane, so that the force is evenly applied to all parts of the battery cell. Specifically, the third planar clamping portion 41 and the fourth planar clamping portion 51 can be set as a clamping plate, and the clamping plate can be set as a non-hollowed-out plate or a partially hollowed-out plate, as long as the battery cell can be clamped and the battery cell is not deformed. The battery cell is clamped by the first clamping mechanism, the second clamping mechanism, the third clamping mechanism and the fourth clamping mechanism, so that battery cells of different heights can be clamped, and the first clamping mechanism and the third clamping mechanism are spaced a certain distance apart to save materials.

[0088] In a preferred implementation manner in this embodiment, the third clamping mechanism 4 further includes a first bottom clamping portion 42 and two third side clamping portions 43, wherein the first bottom clamping portion 42 is connected to one end of the third plane clamping portion 41 facing the bottom surface of the battery cell 1, and the two third side clamping portions 43 are respectively connected to two ends of the third plane clamping portion 41 facing the side surface of the battery cell 1, and the two third side clamping portions 43 respectively clamp partial areas of the two side surfaces of the battery cell 1;

[0089] The fourth clamping mechanism 5 further includes a second bottom clamping portion 52 and two fourth side clamping portions 53, wherein the second bottom clamping portion 52 is connected to one end of the fourth plane clamping portion 51 facing the bottom surface of the battery cell 1, and the two fourth side clamping portions 53 are respectively connected to two ends of the fourth plane clamping portion 51 facing the side surface of the battery cell 1, and the two fourth side clamping portions 53 respectively clamp partial areas of the two side surfaces of the battery cell 1;

[0090] One of the first bottom surface clamping portion 42 and the second bottom surface clamping portion 52 is provided with a second recessed portion (not shown in the figure), and the other is provided with a second raised portion (not shown in the figure) which is positioned in a concave-convex manner in cooperation with the second recessed portion;

[0091] The third side clamping portion 43 and the fourth side clamping portion 53 are connected together by snap fastening.

[0092] The third clamping mechanism 4 and the fourth clamping mechanism 5 are positioned with each other through the second recessed portion and the second raised portion. The third side clamping portion 43 and the fourth side clamping portion 53 located on the same side of the battery cell 1, one of which is provided with a second snap-on convex point (not shown in the figure), and the other is provided with a second snap-on hole (not shown in the figure), and the third clamping mechanism 4 and the fourth clamping mechanism 5 are snapped together through the second snap-on convex point and the second snap-on hole. The third clamping mechanism and the fourth clamping mechanism are assembled in a two-piece snap-on manner. When the transfer fixture is installed, the snap-on convex point of the third clamping mechanism matches and snaps the snap-on hole of the fourth clamping mechanism. When the fixture is to be removed, it is only necessary to apply force to the snap-on convex point to push it out of the snap-on hole to disassemble it. Through the above technical solution, battery cells of different heights can be clamped and materials can be saved.

[0093] In a preferred implementation manner of this embodiment, a flexible layer 6 is provided on the surface of the transfer fixture in contact with the battery cell 1 .

[0094] The main body of the transfer fixture is made of hard material, and the flexible layer 6 is relatively soft or elastic and can be deformed after being subjected to force. By setting a hard main body, it can play a role in supporting the battery cell and bearing force. By setting a flexible layer 6, it can absorb external force and protect the battery cell 1, prevent the battery cell 1 from being hit and crushed, and improve the safety of the battery cell 1. Specifically in this embodiment, the main body of the transfer fixture is made of hard PPS material, and the wall thickness of the hard material is 2-10mm. The flexible layer is made of soft rubber material with a thickness of 1-5mm.

[0095] like Fig.12 As shown, the pole ear 12 is connected to the adapter plate 7 , and a pole post 9 is provided on the top cover 8 , and the pole post 9 is connected to the adapter plate 7 .

[0096] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A battery cell transport fixture, It is characterized in that include: A first clamping mechanism (2), the first clamping mechanism (2) comprising a first planar clamping portion (21) and a first pole lug shaping portion (22), the first planar clamping portion (21) being used to clamp at least a partial area of ​​a plane of the battery cell (1), the first pole lug shaping portion (22) being connected to an end of the first planar clamping portion (21) close to the pole lug (12) and being used to abut against one side of the pole lug (12) and to shape the pole lug (12); A second clamping mechanism (3), the second clamping mechanism (3) comprising a second planar clamping portion (31) and a second pole lug shaping portion (32), the second planar clamping portion (31) being used to clamp at least a portion of another plane of the battery cell (1), the second pole lug shaping portion (32) being connected to an end of the second planar clamping portion (31) close to the pole lug (12) and being used to abut against the other side of the pole lug (12) and to shape the pole lug (12).

2. The transfer fixture according to claim 1, It is characterized in that The first pole lug shaping portion (22) comprises a first vertical surface (221) facing the pole lug (12), a first end surface (222) facing the top surface of the battery cell (1), and a first slope surface (223) connecting the first vertical surface (221) and the first end surface (222) and facing the pole lug (12); the first vertical surface (221) is parallel to the height direction of the battery cell (1); a convex angle is formed between the first vertical surface (221) and the first slope surface (223), and the two abut against one side of the pole lug (12); The second pole lug shaping portion (32) comprises a second vertical surface (321) facing the pole lug (12), a second end surface (322) facing the top surface of the battery cell (1), and a second slope surface (323) connecting the second vertical surface (321) and the second end surface (322) and facing the pole lug (12); the second vertical surface (321) is parallel to the height direction of the battery cell (1); a concave angle is formed between the second vertical surface (321) and the second slope surface (323), and the two abut against the other side of the pole lug (12).

3. The transfer fixture according to claim 2, It is characterized in that The first slope surface (223) and the first end surface (222) are connected via a first fillet transition, and the second slope surface (323) and the second end surface (322) are connected via a second fillet transition, and the radius of the first fillet is smaller than the radius of the second fillet.

4. The transfer fixture according to claim 2, It is characterized in that The included angle between the first slope (223) and the height direction of the battery cell (1) is 45-80 degrees, and the included angle between the second slope (323) and the height direction of the battery cell (1) is 45-80 degrees.

5. The transfer fixture according to claim 2, It is characterized in that There is a certain distance between the first end surface (222) and the top surface of the battery cell (1), and there is a certain distance between the second end surface (322) and the top surface of the battery cell (1).

6. The transfer fixture according to claim 1, It is characterized in that The first pole lug shaping portion (22) and the second pole lug shaping portion (32) abut against each other to form a top surface shielding portion that exposes the location of the pole lug (12) and shields the top surface of the battery cell (1).

7. The transfer fixture according to claim 1, It is characterized in that The first clamping mechanism (2) further comprises two first side clamping portions (23), wherein the two first side clamping portions (23) are respectively connected to two ends of the first plane clamping portion (21) facing the side of the battery core (1); The second clamping mechanism (3) further comprises two second side clamping portions (33), wherein the two second side clamping portions (33) are respectively connected to two ends of the second plane clamping portion (31) facing the side of the battery core (1); One of the first pole lug shaping portion (22) and the second pole lug shaping portion (32) is provided with a first recessed portion (324) for accommodating the pole lug, and the other is provided with a first raised portion (224) for positioning with the first recessed portion (324) and pressing the pole lug into the first recessed portion; The first side clamping portion (23) and the second side clamping portion (33) located on the same side of the battery core (1) are connected together by snapping.

8. The transfer fixture according to claim 1, It is characterized in that The transfer fixture also includes: a third clamping mechanism (4), the third clamping mechanism (4) comprising a third planar clamping portion (41), the third planar clamping portion (41) and the first planar clamping portion (21) being used to clamp the same plane of the battery cell (1), the first clamping mechanism (2) and the third clamping mechanism (4) being respectively close to the top surface and the bottom surface of the battery cell (1); A fourth clamping mechanism (5), the fourth clamping mechanism (5) comprising a fourth planar clamping portion (51), the fourth planar clamping portion (51) and the second planar clamping portion (31) being used to clamp the same plane of the battery cell (1), the second clamping mechanism (3) and the fourth clamping mechanism (5) being respectively close to the top surface and the bottom surface of the battery cell.

9. The transfer fixture according to claim 8, It is characterized in that The third clamping mechanism (4) further comprises a first bottom clamping portion (42) and two third side clamping portions (43), wherein the first bottom clamping portion (42) is connected to one end of the third plane clamping portion (41) facing the bottom surface of the battery cell (1), and the two third side clamping portions (43) are respectively connected to two ends of the third plane clamping portion (41) facing the side surface of the battery cell (1); The fourth clamping mechanism (5) further comprises a second bottom clamping portion (52) and two fourth side clamping portions (53), wherein the second bottom clamping portion (52) is connected to one end of the fourth plane clamping portion (51) facing the bottom surface of the battery cell (1), and the two fourth side clamping portions (53) are respectively connected to two ends of the fourth plane clamping portion (51) facing the side surface of the battery cell (1); One of the first bottom surface clamping portion (42) and the second bottom surface clamping portion (52) is provided with a second recessed portion, and the other is provided with a second raised portion for positioning in a concave-convex manner in cooperation with the second recessed portion; The third side clamping portion (43) and the fourth side clamping portion (53) located on the same side of the battery core (1) are connected together by snapping.

10. The transfer fixture according to claim 1, It is characterized in that A flexible layer (6) is provided on the surface of the transport clamp that contacts the battery core (1).

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