Welding tool for nickel conversion of tabs

Abstract

The utility model relates to the technical field of battery manufacturing, in particular to a welding tool for nickel conversion of a tab. The welding tool for converting the tabs into the nickel comprises a bearing platform and a pressing structure, a containing positioning groove is formed in the upper end face of the bearing platform, the containing positioning groove is used for containing and positioning a battery, and in the state that the battery is contained in the containing positioning groove, the positive pole tab is horizontally connected to the upper end face of the bearing platform in a lap joint mode; nickel strips are arranged at the two ends of the positive pole lug in the vertical direction, the pressing structure and the bearing platform deck jointly press and fix the positive pole lug and the nickel strips in the vertical direction, the pressing position of the pressing structure relative to the positive pole lug is adjustable in the first preset direction, pressing and fixing of the positive pole lug and the nickel strips are achieved, operation is easy, the pressing efficiency is high, and the working efficiency is high. The press fit position of the press fit structure and the positive pole lug can be adjusted according to actual requirements, then the welding position of the positive pole lug and the nickel strip is adjusted in the state that the positive pole lug and the nickel strip are fixed in a press fit mode through the press fit structure and the bearing platform deck, and the actual requirements are met.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a tooling for welding tabs to nickel. Background Technology

[0002] like Figure 1 As shown, the sidewall of battery 2000 has outwardly extending positive electrode tab 2100 and negative electrode tab 2200. Positive electrode tab 2100 is an aluminum tab, and negative electrode tab 2200 is a nickel tab. During the subsequent manufacturing process of battery 2000, positive electrode tab 2100 and negative electrode tab 2200 need to be soldered. However, aluminum tabs have poor mechanical properties and are not easy to solder. To improve the soldering effect of positive electrode tab 2100, a nickel strip needs to be soldered to positive electrode tab 2100. The process of soldering a nickel strip to positive electrode tab 2100 is called nickel transfer.

[0003] In related technologies, the nickel transfer of the positive electrode tab 2100 requires manual pressing of the positive electrode tab 2100 and the nickel strip together followed by welding. However, the pressing and fixing of the positive electrode tab 2100 and the nickel strip requires considerable time and effort for position calibration, resulting in low work efficiency. Furthermore, since the positive electrode tab 2100 extends outward from the side wall of the battery 2000, its upper and lower surfaces are not on the same plane, further increasing the difficulty of pressing the positive electrode tab 2100 and the nickel strip together. In addition, during the nickel transfer process, the welding position of the positive electrode tab 2100 and the nickel strip needs to be adjusted according to actual requirements. Since the position of the positive electrode tab 2100 and the nickel strip is fixed during manual pressing, the pressing position cannot be changed, and consequently, the welding position cannot be changed.

[0004] Therefore, there is an urgent need to invent a welding fixture for transferring the electrode tab to nickel to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a tab-to-nickel welding fixture to achieve precise pressing and fixing of the positive electrode tab extending outward from the side wall of the battery to the nickel strip, which has high working efficiency and can also adjust the welding position of the positive electrode tab and the nickel strip.

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

[0007] A tab-to-nickel welding fixture for clamping a battery, wherein the sidewall of the battery has a positive electrode tab and a negative electrode tab extending horizontally along a first preset direction. The tab-to-nickel welding fixture includes:

[0008] A support platform has a receiving and positioning groove on its upper end surface for receiving and positioning the battery. With the battery positioned in the receiving and positioning groove, the positive electrode tab horizontally rests on the upper end surface of the support platform.

[0009] The pressing structure has nickel strips at both ends of the positive electrode tab along the vertical direction. The pressing structure and the supporting platform press together to fix the positive electrode tab and the nickel strips along the vertical direction. The pressing position of the pressing structure relative to the positive electrode tab is adjustable along the first preset direction.

[0010] As an optional solution, the pressing structure includes:

[0011] A first pressing plate, wherein the dimension of the first pressing plate along the first preset direction is smaller than the dimension of the positive electrode tab along the first preset direction, the first pressing plate and the supporting platform are pressed together in the vertical direction to fix the positive electrode tab and the nickel strip, and the first pressing plate is provided with a first mating protrusion; and

[0012] Multiple position adjustment blocks are provided. The support platform has a position adjustment groove extending along the first preset direction. The position adjustment groove and the positive electrode tab are arranged side by side along the second preset direction. The first mating protrusion and the multiple position adjustment blocks are arranged sequentially along the first preset direction and are locked together in the position adjustment groove. The arrangement order of the first mating protrusion and the position adjustment blocks along the first preset direction is adjustable.

[0013] As an optional solution, the size of the position adjustment block along the first preset direction is equal to the size of the first mating protrusion along the first preset direction.

[0014] As an optional solution, the first pressing plate is provided with the first mating protrusion at both ends along the second preset direction, and the support platform is provided with two position adjustment grooves along the second preset direction. The two position adjustment grooves are respectively located on both sides of the positive electrode tab along the second preset direction. Each position adjustment groove is engaged and fixed with one of the first mating protrusions and multiple position adjustment blocks arranged along the first preset direction.

[0015] As an optional solution, the lower end face of the first pressing plate abuts against the nickel strip, and the lower end face of the first pressing plate is covered with protrusions or grooves.

[0016] As an optional solution, the distance by which the first mating protrusion extends downward from the lower end of the first pressing plate is the sum of the groove depth of the position adjustment groove and the thickness of the positive electrode tab.

[0017] As an optional solution, the pressing structure includes:

[0018] A second pressing plate, the dimension of which is smaller than the dimension of the positive electrode tab along the first preset direction, the second pressing plate and the supporting platform together press and fix the positive electrode tab and the nickel strip in the vertical direction, and the second pressing plate has a first through hole extending in the vertical direction; and

[0019] The fastener has a position adjustment groove extending along the first preset direction on the support platform. The position adjustment groove and the positive electrode tab are arranged side by side along the second preset direction. The bottom of the position adjustment groove is provided with a plurality of second through holes at intervals along the first preset direction. The fastener is locked and fixed to the first through holes and the second through holes in sequence.

[0020] As an optional solution, the pressing structure further includes:

[0021] Multiple guide members are provided. A second mating protrusion is provided in the second pressing plate. A first through hole passes through the second mating protrusion in the vertical direction. Multiple guide members and the second mating protrusion are arranged sequentially in the position adjustment groove along the first preset direction. The arrangement order of the guide members and the second mating protrusion along the first preset direction is adjustable. The first through hole on the second mating protrusion located in the position adjustment groove is always coaxially connected with one of the second through holes.

[0022] As an optional feature, the length of the accommodating positioning groove is adapted to the length of the battery, the width of the accommodating positioning groove is adapted to the width of the battery, and the depth of the accommodating positioning groove is adapted to the distance between the positive electrode tab on the battery and the lower end face of the battery.

[0023] As an optional solution, the walls and / or bottom of the accommodating positioning groove are coated with an elastic buffer layer.

[0024] The beneficial effects of this utility model are:

[0025] The electrode tab to nickel welding fixture provided by this utility model has a receiving and positioning groove on the upper end face of the support platform. The receiving and positioning groove realizes the receiving and positioning of the battery and ensures that when the battery is received in the receiving and positioning groove, the positive electrode tab of the battery is horizontally overlapped on the upper end face of the support platform, thus achieving horizontal support of the positive electrode tab. By setting nickel strips at the upper and lower ends of the positive electrode tab, and pressing and positioning the positive electrode tab and nickel strips together with the pressing structure and the support platform in the vertical direction, the positive electrode tab and nickel strips are pressed and fixed, which is simple to operate and has high pressing efficiency. In addition, since the pressing position of the pressing structure relative to the positive electrode tab is adjustable in a first preset direction, the pressing position of the pressing structure and the positive electrode tab can be adjusted according to actual needs. This allows for adjustment of the welding position of the positive electrode tab and nickel strip when the pressing structure and the support platform have pressed and fixed the positive electrode tab and nickel strips, meeting the needs of nickel welding at different positions of the positive electrode tab. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the battery structure provided in Embodiment 1 of this utility model;

[0027] Figure 2 This is a schematic diagram of the electrode-to-nickel welding fixture and battery provided in Embodiment 1 of this utility model;

[0028] Figure 3 This is a schematic diagram of the electrode tab to nickel welding fixture provided in Embodiment 1 of this utility model;

[0029] Figure 4 This is a cross-sectional schematic diagram of the electrode-to-nickel welding fixture and battery provided in Embodiment 1 of this utility model;

[0030] Figure 5 yes Figure 4 A magnified view of a section at point A in the middle;

[0031] Figure 6 This is a schematic diagram of the pressing structure provided in Embodiment 1 of this utility model;

[0032] Figure 7 This is a schematic diagram of the electrode-to-nickel welding fixture and battery provided in Embodiment 2 of this utility model.

[0033] In the picture:

[0034] 100. Support platform; 110. Receiving and positioning groove; 120. Position adjustment groove;

[0035] 200, Pressing structure; 210, First pressing plate; 211, First mating protrusion; 220, Position adjustment block; 230, Second pressing plate; 231, Second mating protrusion; 232, First through hole; 240, Guide component;

[0036] 2000, battery; 2100, positive electrode tab; 2200, negative electrode tab;

[0037] 3000, nickel bars. Detailed Implementation

[0038] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] 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.

[0040] 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.

[0041] In the description of this embodiment, the terms "upper," "lower," "left," and "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.

[0042] Example 1

[0043] like Figure 1As shown, the sidewall of battery 2000 has outwardly extending positive electrode tab 2100 and negative electrode tab 2200. Positive electrode tab 2100 is an aluminum tab, and negative electrode tab 2200 is a nickel tab. During the subsequent manufacturing process of battery 2000, positive electrode tab 2100 and negative electrode tab 2200 need to be soldered. However, aluminum tabs have poor mechanical properties and are not easy to solder. To improve the soldering effect of positive electrode tab 2100, a nickel strip needs to be soldered to positive electrode tab 2100. The process of soldering a nickel strip to positive electrode tab 2100 is called nickel transfer. Nickel transfer of positive electrode tab 2100 requires manual pressing of positive electrode tab 2100 and nickel strip together before soldering. However, pressing and fixing positive electrode tab 2100 and nickel strip requires considerable time and effort for position calibration, resulting in low work efficiency. Furthermore, since the positive electrode tab 2100 extends outward from the side wall of the battery 2000, the upper and lower surfaces of the positive electrode tab 2100 and the battery 2000 are not on the same plane, further increasing the difficulty of pressing the positive electrode tab 2100 with the nickel strip. In addition, during the nickel transfer process, the welding position of the positive electrode tab 2100 and the nickel strip needs to be adjusted according to actual needs. The position of the positive electrode tab 2100 and the nickel strip is fixed when manually pressed together, and the pressing position of the positive electrode tab 2100 and the nickel strip cannot be changed, thus the welding position of the positive electrode tab 2100 and the nickel strip cannot be changed.

[0044] To solve the above problems, such as Figures 2-5 As shown, this embodiment provides an electrode-to-nickel welding fixture. The electrode-to-nickel welding fixture includes a support platform 100 and a pressing structure 200. The upper surface of the support platform 100 has a accommodating positioning groove 110 for accommodating and positioning a battery 2000. With the battery 2000 housed in the accommodating positioning groove 110, the positive electrode tab 2100 is horizontally overlapped on the upper surface of the support platform 100. Nickel strips 3000 are provided at both ends of the positive electrode tab 2100 along the vertical direction. The pressing structure 200 and the support platform 100 together press and fix the positive electrode tab 2100 and the nickel strips 3000 along the vertical direction. The pressing position of the pressing structure 200 relative to the positive electrode tab 2100 is adjustable along a first preset direction.

[0045] This electrode tab to nickel welding fixture has a receiving and positioning groove 110 on the upper end face of the support platform 100. The receiving and positioning groove 110 is used to receive and position the battery 2000. It ensures that when the battery 2000 is received in the receiving and positioning groove 110, the positive electrode tab 2100 of the battery 2000 is horizontally overlapped on the upper end face of the support platform 100, which can achieve horizontal support for the positive electrode tab 2100. By setting nickel bars 3000 at the upper and lower ends of the positive electrode tab 2100, and pressing and positioning the positive electrode tab 2100 and the nickel bars 3000 together in the vertical direction by the pressing structure 200 and the support platform 100, the pressing and fixing of the positive electrode tab 2100 and the nickel bars 3000 is achieved. The operation is simple and the pressing efficiency is high. Furthermore, since the pressing position of the pressing structure 200 relative to the positive electrode tab 2100 is adjustable along the first preset direction, the pressing position of the pressing structure 200 and the positive electrode tab 2100 can be adjusted according to actual needs, thereby adjusting the welding position of the positive electrode tab 2100 and the nickel bar 3000 when the pressing structure 200 and the support platform 100 press and fix the positive electrode tab 2100 and the nickel bar 3000, so as to meet the needs of nickel transfer welding at different positions of the positive electrode tab 2100.

[0046] Specifically, the length of the accommodating positioning groove 110 is adapted to the length of the battery 2000, the width of the accommodating positioning groove 110 is adapted to the width of the battery 2000, and the depth of the accommodating positioning groove 110 is adapted to the distance between the positive electrode tab 2100 on the battery 2000 and the lower end face of the battery 2000, so as to ensure that when the battery 2000 is accommodated in the accommodating positioning groove 110, the positive electrode tab 2100 can be horizontally overlapped on the upper end face of the supporting platform 100.

[0047] To further enhance the protection of the battery 2000, the walls and / or bottom of the accommodating positioning groove 110 are coated with an elastic buffer layer. By coating the walls and / or bottom of the accommodating positioning groove 110 with an elastic buffer layer, direct collision between the battery 2000 and the walls and / or bottom of the accommodating positioning groove 110 can be avoided when the battery 2000 is placed in the accommodating positioning groove 110, thus improving the protection of the battery 2000. It should be noted that in this embodiment, the elastic buffer layer is made of rubber material. Rubber material has good elasticity, toughness, and wear resistance, and has a long service life. In other embodiments, the elastic buffer layer may also be made of sponge, cotton, or other elastic materials; this embodiment does not impose specific limitations.

[0048] As an optional solution, such as Figures 2-6As shown, the pressing structure 200 includes a first pressing plate 210 and a plurality of position adjusting blocks 220. The dimension of the first pressing plate 210 along the first preset direction is smaller than the dimension of the positive electrode tab 2100 along the first preset direction. The first pressing plate 210 and the support platform 100 press together in the vertical direction to fix the positive electrode tab 2100 and the nickel strip 3000. The first pressing plate 210 is provided with a first mating protrusion 211. The support platform 100 is provided with a position adjusting groove 120 extending along the first preset direction. The position adjusting groove 120 and the positive electrode tab 2100 are arranged side by side along the second preset direction. The first mating protrusion 211 and the plurality of position adjusting blocks 220 are arranged sequentially along the first preset direction and are locked together in the position adjusting groove 120. The arrangement order of the first mating protrusion 211 and the position adjusting blocks 220 along the first preset direction is adjustable. By creating a position adjustment groove 120 extending along a first preset direction on the support platform 100, and arranging the position adjustment groove 120 and the positive electrode tab 2100 side by side along a second preset direction, the first mating protrusion 211 and multiple position adjustment blocks 220 within the pressing structure 200 are sequentially arranged along the first preset direction and snapped into the position adjustment groove 120. This achieves the assembly and fixation of the first pressing plate 210 and the support platform 100, thereby enabling the positive electrode tab located between the first pressing plate 210 and the support platform 100 to be secured. 2100 and nickel bar 3000 are pressed and fixed in the vertical direction. By ensuring that the size of the first pressing plate 210 in the first preset direction is smaller than the size of the positive electrode tab 210 in the first preset direction, the first pressing plate 210 only presses and fixes the part of the positive electrode tab 210 in the first preset direction. Combined with the adjustable arrangement order of the first mating protrusion 211 and the position adjustment block 220 in the first preset direction, the pressing position of the first pressing plate 210 and the positive electrode tab 2100 in the first preset direction is adjusted.

[0049] It should be noted that, in this embodiment, the pressing structure 200 includes three position adjustment blocks 220. The three position adjustment blocks 220 and the first mating protrusion 211 are arranged along a first preset direction and locked in the position adjustment groove 120. The arrangement order of the three position adjustment blocks 220 and the first mating protrusion 211 along the first preset direction is adjustable, so that the first pressing plate 210 can be adjusted relative to the positive electrode tab 2100 between four different pressing positions along the first preset direction. In other embodiments, the specific number of position adjustment blocks 220 can also be adjusted according to actual needs, and this embodiment does not impose a specific limitation.

[0050] In one alternative embodiment, the distance by which the first mating protrusion 211 extends downward from the lower end of the first pressing plate 210 is the sum of the depth of the position adjustment groove 120 and the thickness of the positive electrode tab 2100. When nickel bars 3000 are respectively provided on the upper and lower end faces of the positive electrode tab 2100, the distance by which the first mating protrusion 211 extends downward from the lower end of the first pressing plate 210 is less than the depth of the position adjustment groove 120, the thickness of the positive electrode tab 2100, and the thickness of the two nickel bars 3000. When pressing and fixing the positive electrode tab 2100 and the nickel bars 3000, the first pressing plate 210 can be driven downward as a whole to press the positive electrode tab 2100 and the nickel bars 3000 together, ensuring that the first pressing plate 210 is pressed normally.

[0051] Furthermore, in this embodiment, the lower end face of the first pressing plate 210 abuts against the nickel strip 3000, and the lower end face of the first pressing plate 210 is covered with protrusions or grooves. By covering the lower end face of the first pressing plate 210 with protrusions or grooves, the surface roughness of the lower end face of the first pressing plate 210 can be increased. When the first pressing plate 210 presses and fixes the positive electrode tab 2100 and the nickel strip 3000, the protrusions and grooves at the lower end face of the first pressing plate 210 can increase the friction between the first pressing plate 210 and the nickel strip 3000, preventing the nickel strip 3000 from shifting relative to the first pressing plate 210, and improving the pressing and fixing effect of the first pressing plate 210 on the positive electrode tab 2100 and the nickel strip 3000. Similarly, protrusions or grooves are provided on the upper end face of the support platform 100 at a position directly opposite the positive electrode tab 2100, which is not specifically limited in this embodiment.

[0052] To facilitate determining the pressing position between the positive electrode tab 2100 and the first pressing plate 210, the dimension of the position adjustment block 220 along the first preset direction is equal to the dimension of the first mating protrusion 211 along the first preset direction. By ensuring that the dimension of the position adjustment block 220 along the first preset direction is equal to the dimension of the first mating protrusion 211 along the first preset direction, it is easier to calculate the position adjustment distance of the first pressing plate 210 along the first preset direction, thus improving calculation efficiency.

[0053] In this embodiment, the first pressing plate 210 is provided with first mating protrusions 211 at both ends along the second preset direction, and the support platform 100 is provided with two position adjustment grooves 120 along the second preset direction. The two position adjustment grooves 120 are respectively located on both sides of the positive electrode tab 2100 along the second preset direction. Each position adjustment groove 120 is engaged and fixed with a first mating protrusion 211 and a plurality of position adjustment blocks 220 arranged along the first preset direction. By setting two position adjustment grooves 120 on the support platform 100 and placing the two position adjustment grooves 120 at both ends of the positive electrode tab 2100 along the second preset direction, and setting first mating protrusions 211 at both ends of the first pressing plate 210 along the second preset direction, each position adjustment groove 120 is engaged and fixed with the first mating protrusions 211 arranged along the first preset direction and multiple position adjustment blocks 220, which can further improve the fixing firmness between the first pressing plate 210 and the support platform 100, thereby improving the pressing stability of the positive electrode tab 2100 and the nickel bar 3000.

[0054] Example 2

[0055] This embodiment provides a tab-to-nickel welding fixture. The specific structure of the tab-to-nickel welding fixture provided in this embodiment is basically the same as that in Embodiment 1. The difference between the tab-to-nickel welding fixture provided in this embodiment and Embodiment 1 is that the fixing method of the pressing structure 200 and the supporting platform 100 is different.

[0056] Specifically, such as Figure 7As shown, the pressing structure 200 provided in this embodiment does not include the first pressing plate 210 and the position adjustment block 220. The pressing structure 200 provided in this embodiment includes a second pressing plate 230 and a fixing member (not shown in the figure). The dimension of the second pressing plate 230 along the first preset direction is smaller than the dimension of the positive electrode tab 2100 along the first preset direction. The second pressing plate 230 and the support platform 100 together press and fix the positive electrode tab 2100 and the nickel strip 3000 along the vertical direction. The second pressing plate 230 has a first through hole 232 extending along the vertical direction. The support platform 100 has a position adjustment groove 120 extending along the first preset direction. The position adjustment groove 120 and the positive electrode tab 2100 are arranged side by side along the second preset direction. The bottom of the position adjustment groove 120 is provided with a plurality of second through holes spaced apart along the first preset direction. The fixing member is locked and fixed to the first through hole 232 and the second through hole in sequence. By opening a first through hole 232 extending vertically on the second pressing plate 230, and opening a plurality of second through holes spaced apart along a first preset direction on the position adjustment groove 120 within the support platform 100, and using fasteners to lock and fix them sequentially to the first through holes 232 and the second through holes, the fixed position of the second pressing plate 230 and the support platform 100 along the first preset direction can be adjusted. It should be noted that in this embodiment, the fastener is a bolt, and both the first through hole 232 and the second through hole are threaded holes. The bolt is sequentially threaded into the first through hole 232 and the second through hole. Threaded fixing not only provides good fixing effect but also facilitates assembly and disassembly. In other embodiments, the fastener can also be a fixing pin, which is sequentially inserted and fixed into the first through hole 232 and the second through hole; this embodiment does not specifically limit this.

[0057] As an optional solution, the pressing structure 200 also includes multiple guide members 240. The second pressing plate 230 is provided with a second mating protrusion 231. A first through hole 232 passes through the second mating protrusion 231 in the vertical direction. Multiple guide members 240 and the second mating protrusion 231 are arranged sequentially in the position adjustment groove 120 along a first preset direction. The arrangement order of the guide members 240 and the second mating protrusion 231 along the first preset direction is adjustable. The first through hole 232 on the second mating protrusion 231 located in the position adjustment groove 120 is always coaxially connected with a second through hole. By setting a second mating protrusion 231 on the second pressing plate 230, the first through hole 231 passes through the second mating protrusion 231 in the vertical direction. Multiple guide members 240 are set, and the multiple guide members 240 and the second mating protrusion 231 are arranged in sequence along the first preset direction and filled into the position adjustment groove 120. This ensures that when the arrangement order of the second mating protrusion 231 and the guide members 240 is adjusted along the first preset direction, the first through hole 232 is always coaxially connected with a second through hole. This achieves rapid connection between the first through hole 232 and the second through hole, and improves the fixing efficiency of subsequent fasteners with the first through hole 232 and the second through hole.

[0058] When it is necessary to use fasteners to assemble and fix the second pressing plate 230 to the support platform 100, firstly, the guide 240 is placed into the position adjustment groove 120 along the first preset direction. There will be a gap between the multiple guides 240 and the position adjustment groove 120. Then, the second mating protrusion 232 is placed into the gap, so that the first through hole 232 on the second pressing plate 230 is exactly coaxially connected with a second through hole in the position adjustment groove 120. Then, the fasteners are used to lock and fix the second pressing plate 230 to the first through hole 232 and the second through hole in sequence to complete the assembly and fixation of the second pressing plate 230 and the support platform 100.

[0059] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A tab-to-nickel welding fixture for clamping a battery (2000), wherein the sidewall of the battery (2000) has a positive electrode tab (2100) and a negative electrode tab (2200) extending horizontally along a first preset direction, characterized in that... The electrode-to-nickel welding fixture includes: A support platform (100) has a receiving and positioning groove (110) on its upper end surface. The receiving and positioning groove (110) is used to receive and position the battery (2000). When the battery (2000) is received in the receiving and positioning groove (110), the positive electrode tab (2100) is horizontally attached to the upper end surface of the support platform (100). The pressing structure (200) has nickel strips (3000) at both ends of the positive electrode tab (2100) along the vertical direction. The pressing structure (200) and the supporting platform (100) press and fix the positive electrode tab (2100) and the nickel strips (3000) together along the vertical direction. The pressing position of the pressing structure (200) relative to the positive electrode tab (2100) is adjustable along the first preset direction.

2. The electrode-to-nickel welding fixture according to claim 1, characterized in that, The pressing structure (200) includes: A first pressing plate (210) is provided, wherein the dimension of the first pressing plate (210) along the first preset direction is smaller than the dimension of the positive electrode tab (2100) along the first preset direction. The first pressing plate (210) and the supporting platform (100) are pressed together in the vertical direction to fix the positive electrode tab (2100) and the nickel strip (3000). The first pressing plate (210) is provided with a first mating protrusion (211). Multiple position adjustment blocks (220) are provided. The support platform (100) is provided with a position adjustment groove (120) extending along the first preset direction. The position adjustment groove (120) and the positive electrode tab (2100) are arranged side by side along the second preset direction. The first mating protrusion (211) and the multiple position adjustment blocks (220) are arranged sequentially along the first preset direction and are locked together in the position adjustment groove (120). The arrangement order of the first mating protrusion (211) and the position adjustment blocks (220) along the first preset direction is adjustable.

3. The electrode tab to nickel welding fixture according to claim 2, characterized in that, The dimension of the position adjustment block (220) along the first preset direction is equal to the dimension of the first mating protrusion (211) along the first preset direction.

4. The electrode-to-nickel welding fixture according to claim 2, characterized in that, The first pressing plate (210) is provided with the first mating protrusion (211) at both ends along the second preset direction. The support platform (100) is provided with two position adjustment grooves (120) along the second preset direction. The two position adjustment grooves (120) are respectively located on both sides of the positive electrode tab (2100) along the second preset direction. Each position adjustment groove (120) is engaged and fixed with one first mating protrusion (211) and multiple position adjustment blocks (220) arranged along the first preset direction.

5. The electrode tab to nickel welding fixture according to claim 2, characterized in that, The lower end face of the first pressing plate (210) abuts against the nickel strip (3000), and the lower end face of the first pressing plate (210) is covered with protrusions or grooves.

6. The electrode-to-nickel welding fixture according to claim 2, characterized in that, The distance by which the first mating protrusion (211) extends downward from the lower end of the first pressing plate (210) is the sum of the groove depth of the position adjustment groove (120) and the thickness of the positive electrode tab (2100).

7. The electrode tab to nickel welding fixture according to claim 1, characterized in that, The pressing structure (200) includes: A second pressing plate (230) is provided, the dimension of which along the first preset direction is smaller than that of the positive electrode tab (2100) along the first preset direction. The second pressing plate (230) and the supporting platform (100) are pressed together in the vertical direction to fix the positive electrode tab (2100) and the nickel strip (3000). A first through hole (232) extending in the vertical direction is provided on the second pressing plate (230). The fixing component has a position adjustment groove (120) extending along the first preset direction on the support platform (100). The position adjustment groove (120) and the positive electrode tab (2100) are arranged side by side along the second preset direction. The bottom of the position adjustment groove (120) is provided with a plurality of second through holes at intervals along the first preset direction. The fixing component is locked and fixed to the first through hole (232) and the second through hole in sequence.

8. The electrode-to-nickel welding fixture according to claim 7, characterized in that, The pressing structure (200) further includes: Multiple guide members (240) are provided. A second mating protrusion (231) is provided in the second pressing plate (230). A first through hole (232) passes through the second mating protrusion (231) in the vertical direction. Multiple guide members (240) and the second mating protrusion (231) are arranged sequentially in the position adjustment groove (120) along the first preset direction. The arrangement order of the guide members (240) and the second mating protrusion (231) along the first preset direction is adjustable. The first through hole (232) on the second mating protrusion (231) located in the position adjustment groove (120) is always coaxially connected with one of the second through holes.

9. The electrode-to-nickel welding fixture according to claim 1, characterized in that, The length of the accommodating positioning groove (110) is adapted to the length of the battery (2000), the width of the accommodating positioning groove (110) is adapted to the width of the battery (2000), and the depth of the accommodating positioning groove (110) is adapted to the distance between the positive electrode tab (2100) on the battery (2000) and the lower end face of the battery (2000).

10. The electrode-to-nickel welding fixture according to claim 1, characterized in that, The groove wall and / or bottom of the accommodating positioning groove (110) are coated with an elastic buffer layer.

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