Battery cell tab forming tool

Abstract

The utility model relates to the technical field of battery cells, in particular to a battery cell tab forming tool. The limiting unit is arranged on the supporting table and is configured to fix a battery cell to be processed and expose a tab on one side of the battery cell; the bearing piece is arranged on the supporting table, and at least one bending unit is arranged on one side, deviating from the limiting unit, of the bearing piece; the bending unit is configured to be attached to a tab so as to bend the tab into a preset shape; the tab is partially lapped on the bearing piece through the limiting unit, and one end, far away from the battery cell, of the tab exceeds the bearing piece for a certain distance; the first forming unit comprises a first punch located on the side of the bearing piece, and the first punch is configured to move in the first direction so as to press and connect the part, exceeding the bearing piece, of the tab to the side, where the bending unit is located, of the bearing piece; the bending allowance of the battery cell tab is increased, the possible tolerance and clearance during the battery cell assembly can be made up, and the suspension risk after the battery cell is mounted in a shell is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cores, in particular to a battery core tab forming tool. Background Art

[0002] The packaging of lithium-ion batteries is generally divided into two categories, one is soft-pack batteries and the other is metal-shell batteries. Soft-pack batteries are batteries that use aluminum-plastic packaging film as packaging materials, and metal-shell batteries generally include steel shells and aluminum shells, etc. The advantage of soft-pack batteries is good safety performance. Structurally, they are packaged in aluminum-plastic film, which is less prone to explosion than hard-shell packaging. They have high energy density and are 40% lighter than steel-shell lithium batteries of the same capacity, and 20% lighter than aluminum-shell lithium batteries.

[0003] The tab is a component of soft-pack lithium-ion battery products. The battery is divided into positive and negative electrodes. The tab is a metal conductor that leads the positive and negative electrodes out of the battery cell. In layman's terms, the tabs at the positive and negative poles of the battery are the contact points during charging and discharging. The positive electrode of the battery uses aluminum material, and the negative electrode uses nickel material or copper-cobalt-nickel material. They are all composed of two parts: film and metal strip.

[0004] In a soft-pack battery cell, one end of the tab is led out from the battery cell, and the other end is welded to the tab holder and then installed into the casing together with the battery cell. Since the tab holder and the casing need to be structurally limited and locked, the tab holder is usually fixed to the casing; the bottom of the battery cell needs to fit into the bottom of the casing; however, in the actual assembly process, the tab of the soft-pack battery cell is generally in a vertical state. If there is an assembly tolerance or gap between the battery cell and the casing, the battery cell will be in a suspended state inside the casing, and the bottom of the battery cell cannot be in full contact with the casing, which in turn leads to quality risks of the product. Utility Model Content

[0005] The utility model aims to provide a battery cell tab forming tooling, aiming to increase the bending margin of the battery cell tab, compensate for the tolerance and gap that may exist when assembling the battery cell, and reduce the risk of hanging after the battery cell is installed in a casing.

[0006] The utility model is implemented in this way: the battery core ear forming tooling comprises:

[0007] Support table;

[0008] A limiting unit is arranged on the supporting platform and is configured to fix the battery cell to be processed and expose the tab on one side of the battery cell;

[0009] A supporting member is arranged on the supporting platform, and at least one bending unit is arranged on a side away from the limiting unit, wherein the bending unit is configured to fit the tab to bend the tab into a preset shape; the tab is partially overlapped with the supporting member through the limiting unit, and one end of the tab away from the battery cell exceeds the supporting member by a certain distance;

[0010] A first molding unit, comprising a first punch located beside the support member, wherein the first punch is configured to move along a first direction to press a portion of the tab extending beyond the support member to a side of the support member where the bending unit is located;

[0011] The second molding unit includes a second punch located beside the bending unit, the second punch is configured to move along a second direction to fit the crimped portion of the tab to the bending unit for bending, and the first direction is perpendicular to the second direction.

[0012] The battery cell tab forming tool of the utility model can conveniently fix the battery cell to be processed on the support table through the limiting unit, and expose the tab on one side of the battery cell, the exposed part of the tab is overlapped on the supporting member, and the part of the tab that exceeds the supporting member is used for bending and deformation; the part of the tab that exceeds the supporting member can be bent into a preset shape by means of a bending unit arranged on one side of the supporting member; when the first punch moves along the first direction, the part of the tab that exceeds the supporting member is driven to be pressed down and bent to the side of the bending unit, and then under the action of the second punch, the bent part of the tab is driven to fit onto the bending unit, and the two cooperate to realize the bending forming of the tab, and the bent tab further increases the bending margin of the battery cell tab compared with the conventional hanging state or Z-shaped tab, which can make up for the tolerance and gap that may exist when the battery cell is assembled, and reduce the hanging risk after the battery cell is installed in the casing.

[0013] Preferably, the bending unit comprises: an arc-shaped groove opened from the outer wall of the supporting member on the side away from the limiting unit to the inside thereof, and the arc-shaped groove is configured to allow the tab and the second punch to penetrate.

[0014] Preferably, the cross-sectional shape of the inner side wall of the arc-shaped groove is configured as a semicircle, and the cross-sectional shape of the outer side wall of one end of the second punch penetrating into the arc-shaped groove is configured as a semicircle that matches the arc-shaped groove.

[0015] Preferably, the bending unit further comprises: an arc-shaped portion which is arranged at a corner of one end of the supporting member close to the first punch and connected to the top end of the arc-shaped groove.

[0016] Preferably, a protrusion is formed on a portion of the end surface of the first punch on a side close to the supporting member, and the protrusion is configured to press-fit a portion of the tab that extends beyond the supporting member along a first direction.

[0017] Preferably, a first corner portion is formed between the other end surface of the first punch close to the supporting member and the raised portion, and a second corner portion is formed on the second punch close to the first punch. The first corner portion and the second corner portion are configured to be spliced ​​and attached to the outer wall of the arc portion.

[0018] Preferably, the cross-sectional shape of the first corner portion is configured as a quarter circle, the cross-sectional shape of the second corner portion is configured as a quarter circle, and the cross-sectional shape of the outer side wall of the arc-shaped portion is configured as a semicircle.

[0019] Preferably, the first forming unit further comprises: a support frame mounted on the support platform, and a first driving member fixedly connected to one side of the support frame, wherein the first driving member is configured such that an output end is connected to a side of the first punch away from the supporting member.

[0020] Preferably, the second molding unit further includes: a second driving member installed on the support platform, a slider connected to the output end of the second driving member and slidably installed on the top of the support platform, and the second punch is fixedly connected to one side of the slider close to the supporting member.

[0021] Preferably, the supporting member is configured as a supporting block fixedly mounted on the support table and arranged one-to-one corresponding to the tabs of the battery cell to be processed, and the distance between two adjacent supporting blocks is equal to the distance between two adjacent tabs of the battery cell to be processed.

[0022] Preferably, the limiting unit comprises a plurality of limiting blocks mounted on the support platform, the plurality of limiting blocks being configured to enclose a non-enclosed space capable of at least accommodating and fixing the battery cell to be processed, and the tabs of the battery cell to be processed are led out from the non-enclosed space.

[0023] Preferably, a light hole is formed on one of the limit block and the support platform, and a threaded hole is formed on the other of the limit block and the support platform, and the connection between the limit block and the support platform is achieved by inserting bolts into the light hole and the threaded hole.

[0024] Preferably, the light hole is configured as a waist-shaped hole, the waist-shaped hole is opened through the thickness direction of the limiting block, and there are at least two waist-shaped holes on each limiting block.

[0025] Compared with the prior art, the beneficial effects of the utility model are as follows: the limiting unit is used to facilitate fixing the battery cell to be processed on the support table, and the pole ear on one side thereof is exposed, the exposed part of the pole ear is overlapped on the supporting member, and the part of the pole ear exceeding the supporting member is used for bending and deformation; using the bending unit arranged on one side of the supporting member, the part of the pole ear exceeding the supporting member can be bent into a preset shape; when the first punch moves along the first direction, the part of the pole ear exceeding the supporting member is driven to be pressed down and bent to the side of the bending unit, and then under the action of the second punch, the bent part of the pole ear is driven to fit onto the bending unit, and the two cooperate to realize the bending forming of the pole ear, and the bent pole ear further increases the bending margin of the battery cell pole ear compared to the conventional hanging state or Z-shaped pole ear, which can make up for the tolerance and gap that may exist when the battery cell is assembled, and reduce the risk of suspension after the battery cell is installed in the casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional structural diagram of the battery cell tab forming tooling provided in this application;

[0027] Figure 2 A three-dimensional structural diagram of the battery cell tab forming tooling provided in this application after placing the battery cell;

[0028] Figure 3 A three-dimensional structural diagram of the connection between the supporting member, the first punch and the second punch of the battery cell tab forming tooling provided in the present application;

[0029] Figure 4 A three-dimensional structural diagram from another perspective of the battery cell tab forming tooling provided in this application;

[0030] Figure 5 for Figure 3 Side structural view of the

[0031] Figure 6 A side structural view of a supporting member of a battery cell tab forming tooling provided in the present application;

[0032] Figure 7 for Figure 5 A partial enlarged view of the middle part;

[0033] Figure 8 It is a schematic structural diagram of a supporting member and a pole ear formed by the supporting member in one embodiment of the present application;

[0034] Fig. 9 It is a structural schematic diagram of a supporting member and a pole ear formed by the supporting member in another embodiment of the present application;

[0035] Fig.10 It is a structural schematic diagram of a supporting member and a pole ear formed by the supporting member in another embodiment of the present application;

[0036] Fig.11 It is a structural schematic diagram of a supporting member and a pole ear formed by the supporting member in another embodiment of the present application;

[0037] Fig.12 It is a structural schematic diagram of a supporting member and a pole ear formed by the supporting member in another embodiment of the present application;

[0038] Fig.13 It is a structural schematic diagram of a supporting member and a pole ear formed by the supporting member in another embodiment of the present application;

[0039] Fig.14 It is a schematic structural diagram of a supporting member and a pole ear formed by the supporting member in another embodiment of the present application.

[0040] In the accompanying drawings: 1 support platform, 2 limiting unit, 21 limiting block, 3 supporting member, 4 first molding unit, 41 first punch, 411 protruding portion, 412 first corner portion, 42 supporting frame, 43 first driving member, 5 second molding unit, 51 second punch, 511 second corner portion, 52 second driving member, 53 slider, 6 bending unit, 61 arc groove, 62 arc portion. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0042] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more.

[0043] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0044] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0045] In the embodiments of the present application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0046] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0047] Referring to the existing soft-pack battery cells, the tabs are led out from one side of the battery cell and are generally in a vertical state, that is, the cross-sectional shape is a straight line without bending or curvature; after being grouped, they are laser welded with the tab brackets and then assembled inside the casing. Since the tabs in the vertical state lack the necessary expansion and contraction, and the tab brackets need to be fixed inside the casing, once material tolerances or assembly tolerances occur, the bottom of the battery cell will not be able to fully contact the casing, causing the battery cell to be in a suspended state, which can easily affect the normal function of the battery cell.

[0048] On this basis, there are solutions in the prior art for adjusting and improving the battery tabs. For example, the tabs are bent straight into a Z shape through a deforming tool. Although this can provide the battery cell with a movable margin for downward fitting and improve the hanging phenomenon of some battery cells, its straight shape causes the bending margin in the vertical direction to be relatively small, and the Z-shaped structure makes it occupy a large space in the horizontal direction, which is not convenient for adapting to different installation spaces. For this reason, the tab forming tool proposed in this application aims to provide a tab bending tool of different shapes, increase the bending margin of the battery cell tab, compensate for the tolerances and gaps that may exist during the assembly of the battery cell, and reduce the risk of hanging after the battery cell is installed in the casing.

[0049] like Figure 1As shown, it is a structural diagram of a tab forming tool provided by the utility model, comprising: a support table 1, a limiting unit 2 arranged on the support table 1 and configured to fix the battery cell to be processed and expose the tab on one side thereof, a supporting member 3 arranged on the support table 1 and provided with at least one bending unit 6 on the side away from the limiting unit 2, a first molding unit 4 and a second molding unit 5, the bending unit 6 being configured to fit the tab so as to bend it into a preset shape; the tab is partially overlapped on the supporting member 3 through the limiting unit 2 and one end away from the battery cell exceeds the supporting member 3 by a certain distance; the first molding unit 4 comprises a first punch 41 located beside the supporting member 3, the first punch 41 is configured to move along a first direction to crimp the portion of the tab that exceeds the supporting member 3 to the side where the bending unit 6 of the supporting member 3 is located; the second molding unit 5 comprises a second punch 51 located beside the bending unit 6, the second punch 51 is configured to move along a second direction to fit the crimped portion of the tab with the bending unit 6 for bending, and the first direction is perpendicular to the second direction.

[0050] In actual application of this embodiment, the limiting unit 2 is used to fix the battery cell to be processed on the support table 1, and the pole ear on one side is exposed, the exposed part of the pole ear is overlapped on the supporting member 3, and the part of the pole ear exceeding the supporting member 3 is used for bending and deformation; using the bending unit 6 arranged on one side of the supporting member 3, the part of the pole ear exceeding the supporting member 3 can be bent into a preset shape; when the first punch 41 moves along the first direction, the part of the pole ear exceeding the supporting member 3 is driven to be pressed down and bent to the side of the bending unit 6, and then under the action of the second punch 51, the bent part of the pole ear is driven to fit onto the bending unit 6, and the two cooperate to realize the bending forming of the pole ear. The bent pole ear further increases the bending margin of the battery cell pole ear compared to the conventional hanging state or Z-shaped pole ear, which can make up for the tolerance and gap that may exist when the battery cell is assembled, and reduce the risk of suspension after the battery cell is installed in the casing.

[0051] It should be noted that the first direction in this embodiment can be the height direction of the support table 1, and the second direction is the horizontal direction perpendicular to the height direction. The specific direction of the second direction can be adjusted as needed, such as being parallel to the length direction or width direction of the support table 1; the specific direction of the first direction can be the height descending direction of the support table 1, or it can be the height ascending direction of the support table 1. At this time, it is only necessary to adjust the specific positions of the supporting member 3, the first molding unit 4 and the second molding unit 5. Therefore, the specific directions of the first direction and the second direction, as well as the specific positions of the first molding unit 4, the supporting member 3 and the second molding unit 5, are not restrictive provisions of this embodiment.

[0052] In one case of this embodiment, reference Figures 3 to 7The bending unit 6 includes: an arc groove 61 opened from the outer wall of the supporting member 3 away from the limiting unit 2 to the inside thereof, and the arc groove 61 is configured to allow the pole ear and the second punch 51 to penetrate.

[0053] It can be known that by utilizing the arc groove 61 opened on the side of the supporting member 3 away from the limiting unit 2 and opened toward the inside thereof, a bending space for the pole ear can be provided. The part of the pole ear that exceeds the supporting member 3 passes through the arc groove 61 under the action of the second punch 51 and fits against its inner wall, thereby realizing the preset shape bending of this part of the pole ear.

[0054] It should be noted that the arc-shaped groove 61 in this embodiment is an open groove extending inwardly along the thickness direction of the supporting member 3, and the shape of the interior thereof is used as the basis for bending the tab.

[0055] Exemplarily, the cross-sectional shape of the inner wall of the arc-shaped groove 61 is configured as a semicircle, and the cross-sectional shape of the outer wall of one end of the second punch 51 penetrating into the arc-shaped groove 61 is configured as a semicircle that matches the arc-shaped groove 61 .

[0056] It can be known that setting the cross-sectional shape of the inner side wall of the arc-shaped groove 61 to be semicircular can cooperate with the second punch 51 to form the bent portion of the pole ear entering the inner side wall into a semicircular shape.

[0057] Furthermore, in addition to providing only one arc groove 61, multiple arc grooves 61 may be provided continuously or at intervals along the height direction of the supporting member 3, so as to bend the pole ear into different shapes. Therefore, the number of arc grooves 61, the depth of the arc groove 61, and the curvature of the inner wall can be adjusted as needed to adapt to different working conditions. This embodiment does not make any specific limitations here.

[0058] In another case of this embodiment, reference Figure 6 The bending unit 6 further includes: an arc portion 62 which is arranged at a corner of one end of the supporting member 3 close to the first punch 41 and connected to the top of the arc groove 61 .

[0059] refer to Figure 6 , is a structural schematic diagram of the support member 3 provided in the present application, and a bending unit 6 is arranged on its side wall. An arc portion 62 is further arranged at the top of the arc groove 61, which is convenient for cooperating with the arc groove 61 to achieve two bending of the pole ear, further increasing the bending margin of the battery cell pole ear, and can adapt to different working conditions and the casing for installing the battery cell.

[0060] Specifically, refer to Figure 7 A protrusion 411 is formed on a portion of the end surface of the first punch 41 close to the supporting member 3 , and the protrusion 411 is configured to press the portion of the pole ear that exceeds the supporting member 3 along the first direction.

[0061] It is not difficult to see that, by using the protrusion 411 provided on the bottom end surface of the first punch 41 , the portion of the tab that exceeds the supporting member 3 can be crimped and bent by using the protrusion of this portion, providing a basis for the stamping and forming of the second punch 51 .

[0062] Exemplarily, the raised portion 411 may be integrally formed on the first punch 41, or may be detachably mounted on the bottom end of the first punch 41. The bottom surface of the raised portion 411 may be a flat surface or a curved surface, as long as the crimping of the pole ear can be achieved. Therefore, its specific shape and forming method are not restrictive provisions of this embodiment.

[0063] In actual operation of this embodiment, reference Figure 7 A first corner portion 412 is formed between the other end surface of the first punch 41 close to the supporting member 3 and the protrusion 411, and a second corner portion 511 is formed on the side of the second punch 51 close to the first punch 41. The first corner portion 412 and the second corner portion 511 are configured to be spliced ​​and attached to the outer wall of the arc portion 62.

[0064] It is not difficult to see that the first corner portion 412 and the second corner portion 511 are used to cooperate to assist in the forming of the pole ear located on the outer wall of the arc portion 62. In actual operation, the other end faces of the first punch 41 are first pressed down and fit onto part of the pole ear on the supporting member 3. During this period, the protruding portion 411 crimps and bends the part of the pole ear that exceeds the supporting member 3. After the first punch 41 stops moving, the second punch 51 moves along the second direction. After the second corner portion 511 is aligned with the first corner portion 412, they are fit onto the outer wall of the arc portion 62 together, thereby bending the pole ear at this location into the shape of the arc portion 62.

[0065] In one case of this embodiment, reference Figure 7 The cross-sectional shape of the first corner portion 412 is configured as a quarter circle, the cross-sectional shape of the second corner portion 511 is configured as a quarter circle, and the cross-sectional shape of the outer wall of the arc portion 62 is configured as a semicircle.

[0066] It can be known that the cross-sections of the first corner portion 412 and the second corner portion 511 are both configured to be a quarter circle, so as to cooperate with the semicircular outer side wall of the arc portion 62 to achieve another bend of the tab.

[0067] It should be noted that the cross-sectional curvature of the first corner portion 412 and the second corner portion 511 can be adjusted as needed, as long as the two can be spliced ​​to achieve a semicircular corner. Therefore, the specific curvature of the first corner portion 412 and the second corner portion 511 is not a restrictive provision of this embodiment.

[0068] For further reference, Figure 1 , Figure 2 and Figure 4The first molding unit 4 also includes: a support frame 42 installed on the support platform 1, and a first driving member 43 fixedly connected to one side of the support frame 42, and the first driving member 43 is configured to have an output end connected to a side of the first punch 41 away from the supporting member 3.

[0069] Furthermore, the second molding unit 5 also includes: a second driving member 52 installed on the support platform 1, a slider 53 connected to the output end of the second driving member 52 and slidably installed on the top of the support platform 1, and a second punch 51 is fixedly connected to one side of the slider 53 close to the supporting member 3.

[0070] It can be known that the first driving member 43 drives the first punch 41 to move along the first direction, and the second driving member 52 drives the slider 53 to move along the second direction of the support platform 1, and drives the second punch 51 located on one side to move at the same time.

[0071] It should be noted that the first driving member 43 and the second driving member 52 can both be cylinders, hydraulic rods, and of course ball screw nut structures. Therefore, the specific implementation methods of the two are not restrictive provisions of this embodiment.

[0072] Exemplarily, the first molding unit 4 can be fixed on the support platform 1 by means of a support frame 42, and can also be fixed at other installation positions as needed, such as being fixedly hung on a robotic arm. The same is true for the second molding unit 5. Therefore, the actual installation method of the first molding unit 4 and the second molding unit 5 is not a restrictive provision of this embodiment.

[0073] In actual operation of this embodiment, reference Figure 1 and Figure 3 The supporting member 3 is configured as a supporting block fixedly mounted on the supporting platform 1 and arranged one-to-one corresponding to the tabs of the battery cell to be processed, and the distance between two adjacent supporting blocks is equal to the distance between two adjacent tabs of the battery cell to be processed.

[0074] It can be known that, by using the supporting blocks arranged on the support platform 1, the supporting blocks correspond to the battery cell tabs one by one to assist the bending deformation thereof.

[0075] It should be noted that the bending unit 6 can be integrally formed on the side of the supporting block, or it can be set up in a split manner, such as by welding, bonding, bolting or plug-in matching to achieve relative fixation of the two; therefore, the specific connection and forming method of the bending unit 6 and the supporting member 3 is not a restrictive provision of this embodiment.

[0076] In one case of this embodiment, reference Figure 1 and Figure 2The limiting unit 2 includes a plurality of limiting blocks 21 mounted on the support platform 1, and the plurality of limiting blocks 21 are configured to enclose a non-enclosed space that can at least accommodate and fix the battery cell to be processed, and the tabs of the battery cell to be processed are led out from the non-enclosed space.

[0077] It is not difficult to see that the battery cell to be processed can be fixed inside the support platform 1 by using the limit block 21 arranged on the support platform 1, so as to achieve relative fixation of the two, which is convenient for keeping the battery cell stable during the subsequent tab forming.

[0078] Specifically, a light hole is formed on one side of the limit block 21 and the support platform 1, and a threaded hole is formed on the other side of the limit block 21 and the support platform 1. The connection between the limit block 21 and the support platform 1 is achieved by inserting bolts into the light hole and the threaded hole. Of course, in addition to the threaded connection, the limit block 21 and the support platform 1 can also be fixed by gluing, welding, etc. The specific connection method is not a restrictive provision of this embodiment.

[0079] In another case of this embodiment, the light hole is set as a waist-shaped hole, and the waist-shaped hole is opened along the thickness direction of the limit block 21, and there are at least two waist-shaped holes on each limit block 21. It can be known that the waist-shaped holes are used to facilitate the adjustment of the position of the limit block 21 relative to the support platform 1, so as to facilitate adaptation to soft-pack battery cells of different sizes.

[0080] Exemplarily, one of the limit block 21 and the support platform 1 may be provided with a buckle, and the other may be provided with a slot, and the buckle and the slot may be engaged with each other to connect the limit block 21 and the support platform 1, that is, snap-fit. The snap-fit ​​connection method makes the installation and disassembly between the limit block 21 and the support platform 1 faster and more convenient to operate without the aid of other auxiliary tools. Therefore, the specific connection method between the limit block 21 and the support platform 1 is not a restrictive provision of this embodiment.

[0081] refer to Figure 8 , which is a schematic diagram of the structure of the supporting member 3 provided in the present application and the pole ear formed correspondingly therethrough

[0082] refer to Figures 9 to 14 , for the supporting members 3 of other shapes provided in the present application, and the pole ears formed accordingly, pole ears of different shapes can be formed by changing the bending unit 6 on the supporting member 3 and adjusting the shapes of the first punch 41 and the second punch 51. The shapes of the bending unit 6, the first punch 41 and the second punch 51 can be adjusted as needed to meet different bending requirements of the pole ears, and this embodiment is not specifically limited here.

[0083] In actual operation of this embodiment, reference Figures 9 to 14Implementation methods of other shapes of pole ears are provided, for example: by changing the distribution position and number of the arc portion 62 and the arc groove 61, the final bending shape of the pole ear is adjusted, and the shapes of the first punch 41 and the second punch 51 are changed accordingly, so as to achieve different bending types of the pole ear. Therefore, the shapes of the above-mentioned bending unit 6, the first punch 41 and the second punch 51 are not restrictive provisions of this embodiment, and the equivalent structural transformations of the above-mentioned bending unit 6, the first punch 41 and the second punch 51, as well as the non-creative adjustments to the bending shape of the pole ear should also be included in the protection scope of this application.

[0084] The serial numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments. The above are only preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. Battery cell tab forming tooling, characterized in that: include: Support table; A limiting unit is arranged on the supporting platform and is configured to fix the battery cell to be processed and expose the tab on one side of the battery cell; A supporting member is arranged on the supporting platform, and at least one bending unit is arranged on a side away from the limiting unit, wherein the bending unit is configured to fit the tab to bend the tab into a preset shape; the tab is partially overlapped with the supporting member through the limiting unit, and one end of the tab away from the battery cell exceeds the supporting member by a certain distance; A first molding unit, comprising a first punch located beside the support member, wherein the first punch is configured to move along a first direction to press a portion of the tab extending beyond the support member to a side of the support member where the bending unit is located; The second molding unit includes a second punch located beside the bending unit, the second punch is configured to move along a second direction to fit the crimped portion of the tab to the bending unit for bending, and the first direction is perpendicular to the second direction.

2. The battery cell tab forming tooling according to claim 1, characterized in that: The bending unit comprises: an arc-shaped groove opened from the outer wall of the supporting member on the side away from the limiting unit to the inside thereof, and the arc-shaped groove is configured to allow the tab and the second punch to penetrate.

3. The battery cell tab forming tooling according to claim 2, characterized in that: The cross-sectional shape of the inner side wall of the arc-shaped groove is configured as a semicircle, and the cross-sectional shape of the outer side wall of one end of the second punch penetrating into the arc-shaped groove is configured as a semicircle that matches the arc-shaped groove.

4. The battery cell tab forming tooling according to claim 2 or 3, characterized in that: The bending unit further comprises: an arc portion which is arranged at a corner of one end of the supporting member close to the first punch and connected to the top end of the arc groove.

5. The battery cell tab forming tooling according to claim 4, characterized in that: A protrusion is formed on a portion of the end surface of the first punch on a side close to the supporting member, and the protrusion is configured to press the portion of the tab that exceeds the supporting member along a first direction.

6. The battery cell tab forming tooling according to claim 5, characterized in that: A first corner portion is formed between the other end surface of the first punch close to the supporting member and the protruding portion, and a second corner portion is formed on the second punch close to the first punch. The first corner portion and the second corner portion are configured to be spliced ​​and attached to the outer wall of the arc portion.

7. The battery cell tab forming tooling according to claim 6, characterized in that: The cross-sectional shape of the first corner portion is configured as a quarter circle, the cross-sectional shape of the second corner portion is configured as a quarter circle, and the cross-sectional shape of the outer side wall of the arc portion is configured as a semicircle.

8. The battery cell tab forming tooling according to claim 1, characterized in that: The first molding unit further includes: a support frame installed on the support platform, and a first driving member fixedly connected to one side of the support frame, wherein the first driving member is configured such that an output end is connected to a side of the first punch away from the supporting member.

9. The battery cell tab forming tool according to claim 1, characterized in that: The second molding unit also includes: a second driving member installed on the support platform, a slider connected to the output end of the second driving member and slidably installed on the top of the support platform, and the second punch is fixedly connected to a side of the slider close to the supporting member.

10. The battery cell tab forming tool according to claim 1, characterized in that: The supporting member is configured as a supporting block fixedly mounted on the support table and arranged one-to-one corresponding to the tabs of the battery cell to be processed, and the distance between two adjacent supporting blocks is equal to the distance between two adjacent tabs of the battery cell to be processed.

11. The battery cell tab forming tool according to claim 1, characterized in that: The limiting unit includes a plurality of limiting blocks installed on the support platform, and the plurality of limiting blocks are configured to enclose a non-enclosed space that can at least accommodate and fix the battery cell to be processed, and the tabs of the battery cell to be processed are led out from the non-enclosed space.

12. The battery cell tab forming tool according to claim 11, characterized in that: A light hole is formed on one of the limit block and the support platform, and a threaded hole is formed on the other of the limit block and the support platform. The connection between the limit block and the support platform is achieved by inserting bolts into the light hole and the threaded hole.

13. The battery cell tab forming tool according to claim 12, characterized in that: The light hole is configured as a waist-shaped hole, and the waist-shaped hole is opened through the thickness direction of the limiting block, and there are at least two waist-shaped holes on each limiting block.

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