Battery welding table and battery welding jig

Abstract

The utility model relates to a battery welding table and a battery welding jig. The battery welding table comprises a base body and an insulating part, a welding table top is arranged on the base body, the welding table top (111) is provided with a plurality of tab bearing areas, and the tab bearing areas are classified into positive tab bearing areas or negative tab bearing areas; each group of adjacent positive tab bearing area and negative tab bearing area is correspondingly provided with the insulating part; the insulating part is arranged on the base body in a manner of sliding up and down; the insulating part can slide between an initial position and a working position; when the insulating part is located at the initial position, the top surface of the insulating part is not higher than the welding table surface; when the insulating part is located at the working position, the insulating part is blocked between the positive lug bearing area and the negative lug bearing area so as to separate nickel sheets to be welded with the positive lug and the negative lug. According to the scheme provided by the invention, the battery can be prevented from being short-circuited when the nickel sheets are placed on the tabs.

Description

Technical Field

[0001] This application relates to the technical field of battery manufacturing, and particularly to a battery welding platform and a battery welding jig. Background Art

[0002] During the assembly of lithium-ion batteries, it is necessary to connect the nickel sheets on the protection board and the electrode tabs of the battery cells through laser welding or other methods to combine the protection board and the battery cells. The commonly used connection method is laser welding.

[0003] In the related art, when welding the nickel sheet and the electrode tab of the battery cell, the electrode tab of the battery cell is first placed on the welding platform, then the nickel sheet of the protection board is placed on the electrode tab of the battery cell, and finally the two are welded. However, when the distance between the electrode tabs of the battery cells is small, when placing the nickel sheet of the protection board on the electrode tab of the battery cell, a single nickel sheet is likely to touch the positive and negative electrode tabs of the battery cell simultaneously, which will cause an instantaneous micro-short circuit of the battery and affect the quality of the battery. Summary of the Utility Model

[0004] To solve or partially solve the problems existing in the related art, this application provides a battery welding table and a battery welding jig, which can prevent the battery from short-circuiting when placing the nickel sheet on the electrode tab.

[0005] In the first aspect of this application, a battery welding table is provided, including: a base body and an insulating member;

[0006] A welding tabletop is provided on the base body, and the welding tabletop (111) has a plurality of electrode tab placement areas, and the plurality of electrode tab placement areas are classified into a positive electrode tab placement area or a negative electrode tab placement area;

[0007] For each group of adjacent positive electrode tab placement areas and negative electrode tab placement areas, there is a corresponding insulating member;

[0008] The insulating member is slidably arranged on the base body; the insulating member can slide between an initial position and a working position;

[0009] When the insulating member is in the initial position: the top surface of the insulating member is not higher than the welding tabletop;

[0010] When the insulating member is in the working position: the insulating member is blocked between the positive electrode tab placement area and the negative electrode tab placement area to be used for separating the nickel sheets to be welded with the positive electrode tab and the negative electrode tab.

[0011] Further, the base body is provided with a vertically extending sliding groove, and the sliding groove penetrates the welding tabletop;

[0012] The insulating member is slidably connected to the sliding groove, and the insulating member can slide up and down relative to the base body.

[0013] Furthermore, the battery welding station further comprises: a driving member for driving the insulating member to slide, and the driving member is connected to the insulating member.

[0014] Furthermore, a receiving groove is provided at the lower end of the base, the lower end of the receiving groove is open, a slider is provided in the receiving groove, the slider is slidably connected to the receiving groove along the up and down directions, the lower end of the insulating member is fixedly connected to the slider, and the slider is connected to the driving member.

[0015] Furthermore, a spring is provided between the slider and the receiving groove, the driving member is used to drive the insulating member to move from an initial position to a working position, and the spring is used to reset the insulating member from the working position to the initial position.

[0016] Furthermore, the upper end of the insulating member can extend out of the welding table surface by 1-2 mm.

[0017] Furthermore, the upper end of the insulating member can extend out of the welding table and is a sheet-like structure with a thickness of 1-1.8 mm. Furthermore, the base body is provided with a magnetic member for attracting the nickel sheet.

[0018] A second aspect of the present application provides a battery welding jig, comprising: a battery cell platform, a protection plate positioning device and a battery welding station as described in any one of the above items, wherein the battery cell platform and the protection plate positioning device are relatively located on two sides of the battery welding station.

[0019] Furthermore, the protection plate positioning device includes a first positioning member and two second positioning members arranged opposite to each other, wherein the first positioning member is used to abut against a side of the protection plate away from the battery welding station, and the two second positioning members relatively clamp the protection plate.

[0020] The technical solution provided by the present application may include the following beneficial effects: by placing the battery's pole ear on a welding table, before placing the nickel sheet of the protective plate on the pole ear, the insulating member is slid upward relative to the base and extended from between the positive pole ear and the negative pole ear, and then the nickel sheet is placed on the positive pole ear and the negative pole ear, the extended insulating member separates the two nickel sheets corresponding to the positive pole ear and the negative pole ear, thereby preventing the nickel sheet from causing a short circuit in the battery, and when welding the pole ear and the nickel sheet, the insulating member is slid downward to no higher than the welding table, thereby not affecting the welding.

[0021] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and other objects, features, and advantages of the present application will become more apparent by describing the exemplary embodiments of the present application in more detail with reference to the accompanying drawings. In the exemplary embodiments of the present application, the same reference numerals generally represent the same components.

[0023] Figure 1 is a schematic structural diagram of a battery welding jig shown in an embodiment of the present application;

[0024] Figure 2 is a schematic structural diagram of a battery welding table, a battery cell, and a protection board shown in an embodiment of the present application;

[0025] Figure 3 is a schematic structural diagram of a battery welding table shown in an embodiment of the present application;

[0026] Figure 4 is a cross-sectional view of a battery welding table shown in an embodiment of the present application;

[0027] Figure 5 is a schematic structural diagram of a base shown in an embodiment of the present application.

[0028] Reference numerals:

[0029] 1, battery welding table; 11, base; 111, welding table surface; 112, chute; 113, receiving groove; 12, insulating member; 13, magnetic member; 14, slider; 15, spring; 2, battery cell platform; 3, battery cell; 31, positive electrode tab; 32, negative electrode tab; 4, first positioning member; 5, second positioning member; 6, protection board; 61, nickel sheet. Detailed embodiments

[0030] Embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0031] It should be understood that although the terms "first", "second", "third", etc. may be used in the present application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0032] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0033] Unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0034] In the related art, when welding a nickel sheet and a battery cell tab, the battery cell tab is first placed on a welding platform, then the nickel sheet of the protection board is placed on the battery cell tab, and finally the two are welded. However, when producing small-sized battery cells, the distance between the tabs is small, for example, less than 2 mm. When placing the nickel sheet of the protection board on the battery cell tab, a single nickel sheet is likely to touch the positive and negative tabs of the battery cell simultaneously, which will cause an instant micro-short circuit of the battery and affect the quality of the battery.

[0035] In view of the above problems, the embodiment of the present application provides a battery welding jig, which can prevent the battery from being short-circuited when placing the nickel sheet on the tab.

[0036] The technical solutions of the embodiments of the present application will be described in detail below with reference to the drawings.

[0037] As Figures 1 to 5 shown, the embodiment of the present application provides a battery welding jig, including a battery cell platform 2, a protection board positioning device, and a battery welding table 1. The battery cell platform 2 and the protection board positioning device are located on both sides of the battery welding table 1 relatively. The battery cell platform 2 is used for carrying and limiting the battery cell 3, and the protection board positioning device is used for limiting the protection board 6. The tab of the battery cell 3 and the nickel sheet 61 of the protection board 6 are welded on the battery welding table 1.

[0038] Among them, the battery welding table 1 includes a base body 11 and an insulating member 12. The upper end of the base body 11 is provided with a welding table surface 111 for placing pole ears. The welding table surface 111 has a plurality of pole ear placement areas, and the plurality of pole ear placement areas are classified into a positive pole ear placement area for placing positive pole ears or a negative pole ear placement area for placing negative pole ears. Each adjacent positive pole ear placement area and negative pole ear placement area correspond to an insulating member 12, and the insulating member 12 is slidably arranged on the base body 11; the insulating member 12 can slide between an initial position and a working position. When the insulating member 12 is in the initial position: the top surface of the insulating member 12 is not higher than the welding table surface 111. When the insulating member 12 is in the working position: the insulating member 12 is blocked between the positive pole ear placement area and the negative pole ear placement area to separate the nickel sheet 61 to be welded to the positive pole ear 31 and the negative pole ear 32.

[0039] Based on the above solution, during welding, by placing the pole ears of the battery on the welding table surface 111, the positive pole ear 31 and the negative pole ear 32 are on both sides of the insulating member 12. Before placing the nickel sheet 61 of the protection board 6 on the pole ears, the insulating member 12 is slid upward relative to the base body 11 and extends out between the positive pole ear 31 and the negative pole ear 32, and then the nickel sheet 61 is placed on the positive pole ear 31 and the negative pole ear 32. The extended insulating member 12 separates the two nickel sheets 61 corresponding to the positive pole ear 31 and the negative pole ear 32, and a single nickel sheet 61 will not touch the positive pole ear 31 and the negative pole ear 32 at the same time, thereby avoiding the nickel sheet 61 causing a short circuit of the battery. When welding the pole ears and the nickel sheet 61, the insulating member 12 is slid downward to be not higher than the welding table surface 111, so as not to affect the welding.

[0040] Specifically, the welding table surface 111 is a plane, the insulating member 12 extends upward from between the positive pole ear 31 and the negative pole ear 32, and the upper end of the insulating member 12 is higher than the upper surfaces of the two pole ears. When the two nickel sheets 61 are respectively placed on the upper surfaces of the two pole ears, the insulating member 12 is located in the gap between the two nickel sheets 61 to prevent the nickel sheet 61 from touching the two pole ears at the same time. Before welding the nickel sheet 61 and the pole ears, the insulating member 12 is lowered, and the upper end of the insulating member 12 is lower than the welding table surface 111 or flush with the welding table surface 111, so as to prevent interference between the laser welding press jaw mechanism and the insulating member 12 when pressing down.

[0041] In some embodiments, the base body 11 is provided with a vertically extending chute 112, the chute 112 penetrates the welding table surface 111, the insulating member 12 is slidably connected to the chute 112, the insulating member 12 can slide up and down relative to the base body 11, and when the insulating member 12 slides upward, it can extend out between the positive pole ear 31 and the negative pole ear 32, thereby separating the two nickel sheets 61 corresponding to the positive pole ear 31 and the negative pole ear 32, and the insulating member 12 can slide downward to be not higher than the welding table surface 111.

[0042] In some embodiments, the battery welding table 1 further includes a driving member for driving the insulating member 12 to slide up and down, and the driving member is connected to the insulating member 12. The insulating member 12 slides up and down, and the sliding groove 112 limits the insulating member 12 to prevent the insulating member 12 from tilting and preventing the insulating member 12 from interfering with the tab or the nickel sheet 61.

[0043] In some embodiments, as Figure 3 and Figure 4 shown, the insulating member 12 is a sheet-like structure, and the driving member is connected to the lower end of the insulating member 12. Specifically, the two tabs are located on both sides of the insulating member 12 in the thickness direction, and the insulating member 12 slides vertically with respect to the welding table surface 111. In the illustrated embodiment, a receiving groove 113 is provided at the lower end of the base body 11, the lower end of the receiving groove 113 is open, a slider 14 is provided in the receiving groove 113, the slider 14 is slidably connected to the receiving groove 113 in the up and down direction, the lower end of the insulating member 12 is fixedly connected to the slider 14, and when the slider 14 slides up and down, it drives the insulating member 12 to slide up and down. The driving member is connected to the slider 14 and drives the slider 14 to slide.

[0044] In some embodiments, as Figure 4 shown, a spring 15 is provided between the upper end of the slider 14 and the upper end of the receiving groove 113. The spring 15 can be a compression spring 15. The driving member is used to drive the insulating member 12 to move from the initial position to the working position. When the driving member drives the slider 14 to slide upward, the slider 14 compresses the spring 15. After placing the nickel sheet 61, the driving member stops acting on the slider 14, and the slider 14 slides downward under the elastic force of the spring 15, so that the insulating member 12 returns from the working position to the initial position.

[0045] In some embodiments, the driving member is a combination of a cylinder, an electric push rod or a motor and a cam. The driving member can be slidably connected or abutted, or directly connected or abutted to the lower end of the insulating member 12. When the driving member is a combination of a motor and a cam, the motor drives the cam to rotate, and the cam abuts against the slider 14 or the lower end of the insulating member 12.

[0046] In some embodiments, the upper end of the insulating member 12 can extend out of the range of the welding table surface 111 by 1-2 mm. Specifically, the thickness of the tab is generally less than 1 mm, and the upward extension of the insulating member 12 is higher than the thickness of the tab.

[0047] In some embodiments, a section of the upper end of the insulating member 12 that can extend out of the welding table surface 111 is a sheet-like structure and has a thickness of 1-1.8 mm. The thickness of the insulating member 12 is not greater than 1.8 mm, which is convenient for extending out between the two tabs and the two nickel sheets 61. The insulating member 12 is greater than or equal to 1 mm, which can ensure the strength of the insulating member 12.

[0048] In some embodiments, as Figure 3 and Figure 4As shown, the base 11 is provided with a magnetic member 13 for attracting the nickel sheet 61. When the nickel sheet 61 is placed on the pole ear, the nickel sheet 61 is first attracted by the magnetic member 13 to pre-position the protective plate 6, and then the protective plate 6 is fixed by the protective plate positioning device, so as to facilitate the positioning of the protective plate 6. Specifically, there are two magnetic members 13, which are respectively arranged opposite to the two nickel sheets 61 on the protective plate 6, and a slot for accommodating the magnetic member 13 is provided on the base 11.

[0049] In some embodiments, the insulating member 12 is made of ceramic or PEEK polyetheretherketone. Ceramics or PEEK have good insulation, high temperature resistance, self-lubricity and mechanical properties, and can meet the environmental requirements of laser welding.

[0050] In some embodiments, Figure 1 As shown, the protection plate positioning device includes a first positioning member 4 and two second positioning members 5 arranged opposite to each other. The first positioning member 4 is used to abut against the side of the protection plate 6 away from the battery welding station 1, and the two second positioning members 5 clamp the protection plate 6 opposite to each other.

[0051] Specifically, the first positioning member 4 and the battery welding table 1 respectively abut and clamp the protective plate 6 from both sides of the thickness direction of the protective plate 6, and the two second positioning members 5 respectively abut and clamp the protective plate 6 from both sides of the length direction of the protective plate 6, so that the protective plate positioning device limits the protective plate 6 from two directions, the nickel sheet 61 is in contact with the pole ear, and the upper and lower directions of the protective plate 6 are limited by the welding table surface 111, so as to accurately position the protective plate 6.

[0052] In summary, the embodiment of the present application provides a battery welding jig, which is operated to the protective plate placement station, the protective plate positioning device is in an open state, the battery cell 3 is placed on the battery cell platform 2, and the pole ear is located on the welding table 111; then the insulating part 12 is raised and extends upward from between the two pole ears; the protective plate 6 is placed, so that the two nickel sheets 61 on the protective plate 6 are located on both sides of the insulating part 12, the magnetic part 13 attracts the nickel sheets 61, and then the protective plate 6 is fixed and limited by the first positioning part 4 and the second positioning part 5; then the insulating part 12 is lowered to no higher than the welding table 111, and the battery welding jig is operated to the welding station for welding.

[0053] The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of the various embodiments have their own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily required for the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application can be adjusted in order, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0054] The embodiments of the present application have been described above. The above description is exemplary and not exhaustive, and is also not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, the practical application, or the improvement of the technology in the market, or to enable other ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A battery welding station (1), characterized in that: include: A substrate (11) and an insulating member (12); A welding table (111) is provided on the base (11), and the welding table (111) has a plurality of tab receiving areas, and the plurality of tab receiving areas are classified into positive tab receiving areas or negative tab receiving areas; Each group of adjacent positive electrode ear receiving areas and negative electrode ear receiving areas corresponds to the insulating member (12); The insulating member (12) is slidably arranged on the base (11) up and down; the insulating member (12) is capable of sliding between an initial position and a working position; When the insulating member (12) is in the initial position: the top surface of the insulating member (12) is not higher than the welding table surface (111); When the insulating member (12) is in the working position, the insulating member (12) is separated between the positive electrode ear receiving area and the negative electrode ear receiving area to separate the nickel sheet (61) to be welded to the positive electrode ear (31) and the negative electrode ear (32).

2. The battery welding station (1) according to claim 1, characterized in that: The base body (11) is provided with a slide groove (112) extending up and down, and the slide groove (112) passes through the welding table surface (111); The insulating member (12) is slidably connected to the sliding groove (112), and the insulating member (12) can slide up and down relative to the base body (11).

3. The battery welding station (1) according to claim 1, characterized in that: Also includes: A driving member used for driving the insulating member (12) to slide, the driving member being connected to the insulating member (12).

4. The battery welding station (1) according to claim 3, characterized in that: A receiving groove (113) is provided at the lower end of the base body (11), the lower end of the receiving groove (113) is open, a slider (14) is provided in the receiving groove (113), the slider (14) is slidably connected to the receiving groove (113) in an up-down direction, the lower end of the insulating member (12) is fixedly connected to the slider (14), and the slider is connected to the driving member.

5. The battery welding station (1) according to claim 4, characterized in that: A spring (15) is provided between the slider (14) and the receiving groove (113); the driving member is used to drive the insulating member (12) to move from an initial position to a working position; and the spring (15) is used to reset the insulating member (12) from the working position to the initial position.

6. The battery welding station (1) according to claim 1, characterized in that: The upper end of the insulating member (12) can extend beyond the welding table surface (111) by 1-2 mm.

7. The battery welding station (1) according to claim 1, characterized in that: A section of the upper end of the insulating member (12) that is capable of extending out of the welding table surface (111) is a sheet-like structure and has a thickness of 1-1.8 mm.

8. The battery welding station (1) according to claim 1, characterized in that: The base body (11) is provided with a magnetic member (13) for attracting the nickel sheet (61).

9. A battery welding jig, characterized in that: include: A battery cell platform (2), a protection plate positioning device, and a battery welding station (1) as claimed in any one of claims 1 to 8, wherein the battery cell platform (2) and the protection plate positioning device are relatively located on two sides of the battery welding station (1).

10. The battery welding jig according to claim 9, characterized in that: The protection plate positioning device comprises a first positioning member (4) and two second positioning members (5) arranged opposite to each other, wherein the first positioning member (4) is used to abut against a side of the protection plate (6) facing away from the battery welding platform (1), and the two second positioning members (5) relatively clamp the protection plate (6).

Images