Welding tool, welding device and battery production equipment

Abstract

The utility model relates to the technical field of battery processing, in particular to a welding tool, a welding device and battery production equipment, the welding tool comprises a tool body, a row of supporting parts are formed on the edge of the tool body, the supporting parts are arranged at intervals in the length direction of the tool body, and a slit is formed between every two adjacent supporting parts. The battery cell tabs are led out from the slits, so that the battery cell tabs can be limited, the battery cell tabs are effectively structured, and the short circuit of the battery cell is prevented; the tabs of the two adjacent battery cells are jointly pressed on the same supporting part, the supporting part serves as a base material for auxiliary supporting of the tabs when the tabs are welded, the tabs of the two adjacent battery cells can be directly welded on the supporting part, direct lap welding of the tabs between the battery cells is achieved, the product weight is reduced, and the product capacity density is increased; a battery core loop is shortened and product internal resistance is reduced; the welding frequency can be reduced by 50%, the production cost is reduced by half, and the production efficiency is doubled.

Description

Technical Field

[0001] The present application relates to the field of battery processing technology, and in particular to welding tooling, welding devices and battery production equipment. Background Art

[0002] Soft-pack batteries are a type of liquid lithium-ion battery that uses aluminum-plastic film as packaging material and has a series of advantages, such as good safety performance, light weight, large capacity, small internal resistance, good cycle performance, and flexible design.

[0003] At present, soft-pack modules all use adapter plates or busbar brackets to constrain the cell tabs, and the tabs are welded to the busbars to achieve a series-parallel structure between the cells. In other words, each cell in the full-pack module needs to be welded to the busbar separately to achieve the series-parallel performance requirements between the cells. The method of using adapter plates or busbar brackets to constrain the cell tabs and welding the tabs to the busbars has the following disadvantages: it adds additional weight to the product, resulting in low module capacity density and larger product size; it increases the cell loop distance, resulting in increased internal resistance of the product; it has low efficiency and a large number of process control points, resulting in many product failure points. Utility Model Content

[0004] The present application provides a welding tool, a welding device and a battery production equipment, which are used to solve the problem in the prior art that each battery cell in a full-package module needs to be welded to a bus bar separately to achieve series and parallel connection between the battery cells.

[0005] On the one hand, the present application provides a welding tool, including a tool body, wherein a row of support parts are formed on the edge of the tool body, and the support parts are arranged at intervals along the length direction of the tool body, and a slit is formed between two adjacent support parts.

[0006] In one possible design, the tool body is a plate-like structure;

[0007] and / or, the support portion is a rod-shaped structure extending in a height direction of the tooling body;

[0008] And / or, the tool body and the support part are an integrated structure.

[0009] In a possible design, a guiding inclined surface is formed at one end of the supporting portion away from the tool body, and the guiding inclined surfaces of two adjacent supporting portions are arranged opposite to each other to form an entrance of the slit.

[0010] In a possible design, the support portion includes a first support portion and a second support portion, the first support portion and the second support portion are spaced apart, and a width of the first support portion is smaller than a width of the second support portion.

[0011] In one possible design, the welding tool also includes:

[0012] A first pressing block is arranged on one side of the tool body;

[0013] The second pressing block is arranged on the other side of the tool body. The second pressing block can be detachably connected with the first pressing block so that the tool body is pressed between the first pressing block and the second pressing block.

[0014] In a possible design, a limiting groove is formed on the first pressing block, and the opposite sides of the tool body respectively abut against the inner groove bottom of the limiting groove and the second pressing block, and the opposite ends of the tool body respectively abut against the inner side wall of the limiting groove.

[0015] In a possible design, a mounting hole is formed on the tool body.

[0016] In one possible design, the support portion is Bakelite.

[0017] On the other hand, the present application also provides a welding device, comprising the welding tool as described above.

[0018] On the other hand, the present application also provides a battery production equipment, including the welding device as described above.

[0019] The beneficial effects of this application are as follows:

[0020] The welding tool of the present application forms a row of support parts on the edge of the tool body, and the support parts are arranged at intervals along the length direction of the tool body, and a slit is formed between two adjacent support parts. By leading the pole ears of the battery cell out of the slit, the pole ears of the battery cell can be limited, and the pole ears of the battery cell can be effectively regularized to prevent the battery cell from being skewed and short-circuited. During welding, the pole ears of two adjacent battery cells are pressed together on the same support part, and the support part serves as a base material for welding the pole ears. The support part is used to provide auxiliary support for the pole ears, and the pole ears of two adjacent battery cells can be directly welded on the support part, so that direct lap welding of the pole ears between the battery cells is achieved, and the bus bracket or adapter plate in the prior art can be eliminated, thereby reducing the product BOM cost, reducing the product weight, and increasing the product capacity density; shortening the battery cell loop and reducing the product internal resistance; compared with the prior art, it can reduce the number of welding times by 50%, halving the production cost, and doubling the production efficiency. At the same time, after the lap welding of the tabs between the battery cells is completed, the welding tooling of the present application can be removed from the tabs, thereby realizing the recycling of the welding tooling.

[0021] The welding device provided in the present application includes the welding tool in the present application, and therefore also includes all the above-mentioned advantages of the welding tool.

[0022] The battery production equipment provided in the present application includes the welding device in the present application, and thus includes all the above-mentioned advantages of the welding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A structural schematic diagram of a welding tool provided in an embodiment of the present application;

[0025] Figure 2 Another structural schematic diagram of the welding tool provided in the embodiment of the present application;

[0026] Figure 3 A top view of a welding tool provided in an embodiment of the present application;

[0027] Figure 4 This is a schematic diagram of the structure of the tooling body provided in an embodiment of the present application.

[0028] Reference numerals:

[0029] 100, tool body; 110, support portion; 111, first support portion; 112, second support portion; 120, slit; 130, guide slope; 210, first pressing block; 220, second pressing block; 211, limiting groove. DETAILED DESCRIPTION

[0030] The technical solution of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0031] At present, soft-pack modules use adapter plates or busbar brackets to constrain the cell tabs, and the tabs are welded to the busbars to achieve a series-parallel structure between the cells. The continuous high cost and heavy product weight lead to low module capacity density and large product size. The cell loop distance is long and the product internal resistance is large; since each cell tab is welded to the busbar once, the efficiency is low and the number of process control points is large, resulting in many product failure points.

[0032] To solve the above problems, the following Figure 1-Figure 4 , describing the welding tool provided in an embodiment of the present application, the welding tool includes a tool body 100, an edge of the tool body 100 is formed with a row of support parts 110, the support parts 110 are arranged at intervals along the length direction of the tool body 100, and a slit 120 is formed between two adjacent support parts 110.

[0033] By utilizing the technical solution in the above-mentioned embodiment, a row of support parts 110 are formed on the edge of the tooling body 100, and the support parts 110 are arranged at intervals along the length direction of the tooling body 100, and a slit 120 is formed between two adjacent support parts 110. By leading the pole ears of the battery cell out of the slit 120, the pole ears of the battery cell can be limited, and the pole ears of the battery cell can be effectively regularized to prevent the battery cell from being skewed and short-circuited. During welding, by pressing the pole ears of two adjacent battery cells together on the same support part 110, the support part 110 is used as a base material for welding the pole ears, and the support part 110 is used to provide auxiliary support for the pole ears, and the pole ears of two adjacent battery cells can be directly welded on the support part 110, so as to realize direct lap welding of the pole ears between the battery cells, and the bus bracket or adapter plate in the prior art can be eliminated, thereby reducing the BOM cost of the product, reducing the product weight, and increasing the product capacity density; shortening the battery cell loop and reducing the internal resistance of the product; compared with the prior art, the number of welding times can be reduced by 50%, and the production cost can be halved and the production efficiency can be doubled. At the same time, after the lap welding of the tabs between the battery cells is completed, the welding tooling of the present application can be removed from the tabs, thereby realizing the recycling of the welding tooling.

[0034] Reference Figure 4 As shown, in some embodiments of the present application, the tooling body 100 is a plate-like structure, and the specific tooling body 100 is a rectangular plate-like structure. The support portion 110 is arranged at the edge of the tooling body 100, for example, the support portion 110 extends along the plane of the tooling body 100, and a slit 120 is formed between two adjacent support portions 110. By fixing the tooling body 100 on the battery cell housing, the tabs of the battery cell are extended from the slit 120 between two adjacent support portions 110. During welding, the tabs of two adjacent battery cells are pressed together on the same support portion 110, and the support portion is used as a base material during the welding of the tabs. The tabs are auxiliary supported by the support portion 110, and the tabs of two adjacent battery cells can be directly welded on the support portion 110, thereby realizing direct lap welding of the tabs between the battery cells. In some specific embodiments, the support portion 110 is a rod-shaped structure extending in the height direction of the tooling body 100. For example, the support portion 110 is a rectangular rod. In this way, the surface of the support portion 110 can form a plane, and the plane can be used as a base material during the welding of the tabs to provide auxiliary support for the tabs. In some specific embodiments, the tooling body and the support portion 110 are an integrated structure. Specifically, by providing a through groove on the tooling body, the notch of the through groove is located at the edge of the tooling body, so that the tooling body between the through grooves forms a support portion, so that the tooling body and the support portion 110 are an integrated structure, the production process can be simplified.

[0035] Reference Figure 4As shown, in some embodiments of the present application, a guide slope 130 is formed at one end of the support portion 110 away from the tool body 100, and the guide slopes 130 of two adjacent support portions are arranged oppositely to form the entrance of the slit 120. Specifically, the support portion 110 is in the shape of a rectangular rod, and the support portion has two oppositely arranged side surfaces and two oppositely arranged end surfaces, one of which serves as a substrate for the pole ear during the welding process to provide support for the pole ear, and a slit 120 is formed between the two oppositely arranged end surfaces of the two adjacent support portions 110. In some specific embodiments, the guide slopes 130 are respectively arranged at positions where the two end surfaces are away from the tool body 100, and an angle is formed between the plane where the guide slopes 130 are located and the end surface of the support portion 110, and the guide slopes 130 of the two adjacent support portions 110 are arranged oppositely to form the entrance of the slit 120, and the distance between the guide slopes 130 of the two adjacent support portions 110 is greater than the width of the slit 120, so as to facilitate the guidance of the pole ear into the slit 120.

[0036] Reference Figure 4 As shown, in some embodiments of the present application, the support portion 110 includes a first support portion 111 and a second support portion 112, the first support portion 111 and the second support portion 112 are arranged at intervals, and the width of the first support portion 111 is smaller than the width of the second support portion 112. It should be noted that the tabs of two adjacent battery cells respectively pass through the two slits 120, and during welding, the tabs of the two battery cells are pressed onto one support portion 110. By making the width of the first support portion 111 smaller than the width of the second support portion 112, the tabs of the two battery cells can be pressed onto the wider second support portion 112 while meeting the battery cell length requirement, which is more conducive to welding between the battery cell tabs.

[0037] Reference Figure 1 , Figure 2 As shown, in some embodiments of the present application, the welding tool further includes a first pressing block 210 and a second pressing block 220, wherein the first pressing block 210 is disposed on one side of the tool body; the second pressing block 220 is disposed on the other side of the tool body, and the second pressing block 220 can be detachably connected to the first pressing block 210 so that the tool body is pressed between the first pressing block 210 and the second pressing block 220. In some specific embodiments, the first pressing block 210 and the second pressing block 220 are connected by bolts so that the tool body is pressed between the first pressing block 210 and the second pressing block 220. In this way, by connecting the first pressing block 210 or the second pressing block 220 to the battery cell housing, the tool body can be installed on the battery cell housing, thereby fixing the position of the support portion.

[0038] Reference Figure 3As shown, in some embodiments of the present application, a limiting groove 211 is formed on the first pressing block 210, and the two opposite sides of the tool body are respectively in contact with the inner groove bottom of the limiting groove 211 and the second pressing block 220, and the two opposite ends of the tool body are respectively in contact with the inner side wall of the limiting groove 211. In this way, the tool body can be limited in four directions, front, back, left, and right, respectively, and the stability of the tool body on the first pressing block 210 and the second pressing block 220 can be improved.

[0039] In some embodiments of the present application, a mounting hole is formed on the tool body, and bolts pass through the mounting hole to press the tool body between the first pressure block 210 and the second pressure block 220. This is beneficial to improve the stability of the tool body on the first pressure block 210 and the second pressure block 220.

[0040] In some embodiments of the present application, the supporting part is bakelite, which has high mechanical strength, good insulation, heat resistance and corrosion resistance, and can provide reliable support for the pole ear. At the same time, its heat resistance can prevent the pole ear from being damaged during welding.

[0041] Before welding the tabs, the welding tool of the present application is installed at the position of the end plate of the battery cell housing. Generally, one welding tool is installed at each of the two end plates; then the tabs of the battery cell are led out from the slit 120 to regularize the tabs of the battery cell; during welding, the tabs of two adjacent battery cells are pressed together on the same support portion, and the support portion serves as a base material for auxiliary support of the tabs during tab welding, and the tabs of two adjacent battery cells are directly welded on the support portion to achieve direct lap welding of the tabs between the battery cells. After the lap welding of the tabs between the battery cells is completed, the welding tool of the embodiment of the present application is removed from the tabs, and the welding tool of the embodiment of the present application can be reused to achieve the recycling of the welding tool.

[0042] It should be noted that the present application can be applied not only to the lap welding between the tabs of the battery cell, but also to the welding of the FPC (collection component). The FPC is pressed between the first pressing block 210 and the second pressing block 220, and the slit 120 between the supporting parts avoids the position of the NTC and the fuse resistor, so as to realize the double-sided welding of the FPC, thereby eliminating the single-sided adhesive of the FPC and realizing the material cost reduction.

[0043] The welding tool of the present application has the following beneficial effects:

[0044] 1. The welding tool of the present application can eliminate the use of busbar brackets or adapter plates, thereby reducing product BOM costs, reducing product weight, and increasing product capacity density;

[0045] 2. The welding tool of the present application can realize the direct welding of the battery cell tabs to each other to realize the series and parallel connection between the battery cells, which is beneficial to reduce the intermediate materials, shorten the battery cell circuit, and reduce the internal resistance of the product;

[0046] 3. The welding tooling of this application can achieve lap welding between the tabs of the battery cells, thereby effectively reducing the number of welding times and doubling the production capacity; the welding time of a single product is reduced from the original 15 minutes to 8 minutes, and the welding yield is >99.97%; the number of welding times is reduced by 50%, the production efficiency is doubled, and the production cost is reduced by half, achieving cost reduction and efficiency improvement.

[0047] An embodiment of the present application also provides a welding device, including the welding tool in the above embodiment.

[0048] It should be noted that the welding device includes the welding tooling, which also includes all the advantages of the welding tooling mentioned above, which will not be repeated here.

[0049] An embodiment of the present application also provides a battery production device, including the welding device in the above embodiment.

[0050] It should be noted that the battery production equipment includes a welding device, which also includes all the advantages of the welding device mentioned above, which will not be repeated here.

[0051] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0055] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A welding tool, characterized in that: The tool body comprises a tool body, the edge of which is formed with support parts, the support parts are arranged at intervals along the length direction of the tool body, and a slit is formed between two adjacent support parts.

2. The welding tool according to claim 1, characterized in that: The tool body is a plate-like structure; And / or, the support portion is a rod-shaped structure extending along the height direction of the tooling body; And / or, the tool body and the support part are an integrated structure.

3. The welding tool according to claim 2, characterized in that: A guiding inclined surface is formed at one end of the supporting portion away from the tool body, and the guiding inclined surfaces of two adjacent supporting portions are arranged opposite to each other to form an entrance of the slit.

4. The welding tool according to claim 2, characterized in that: The support portion includes a first support portion and a second support portion, the first support portion is spaced apart from the second support portion, and a width of the first support portion is smaller than a width of the second support portion.

5. The welding tool according to any one of claims 1 to 4, characterized in that: Also includes: A first pressing block is arranged on one side of the tool body; The second pressing block is arranged at the other side of the tool body. The second pressing block can be detachably connected to the first pressing block so that the tool body is pressed between the first pressing block and the second pressing block.

6. The welding tool according to claim 5, characterized in that: A limiting groove is formed on the first pressing block, the opposite sides of the tool body are respectively in contact with the inner groove bottom of the limiting groove and the second pressing block, and the opposite ends of the tool body are respectively in contact with the inner sidewall of the limiting groove.

7. The welding tool according to claim 6, characterized in that: A mounting hole is formed on the tool body.

8. The welding tool according to claim 1, characterized in that: The supporting part is made of bakelite.

9. A welding device, characterized in that: The invention comprises the welding tool as described in any one of claims 1 to 8.

10. A battery production device, characterized in that: Comprising the welding device as claimed in claim 9.

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