Lithium battery chip welding positioning device

Abstract

The utility model relates to a lithium battery chip welding and positioning device which comprises an outer protection plate, a plurality of first through holes, a plurality of second through holes and a plurality of clamping plates, wherein the first through holes are formed in the outer protection plate at intervals; the positioning mechanism comprises a limiting clamping strip, an insulating substrate, a positioning convex block and a positioning column, the insulating substrate is detachably mounted on the surface of the outer protection plate, and a plurality of second through holes corresponding to the first through holes are formed in the insulating substrate; the surface, in contact with the outer protection plate, of the insulating substrate is defined as an outer surface, and the surface, deviating from the outer protection plate, of the insulating substrate is defined as an inner surface; the positioning bumps are formed on the inner surface of the insulating substrate; the limiting clamping strips are arranged on the inner surface of the insulating substrate or the inner surface of the positioning convex block at intervals; and the positioning columns are formed at four corners of the outer surface of the insulating substrate. The positioning mechanism can be protected through the outer protection plate, and the positioning mechanism is simple in structure, good in economical efficiency and convenient to cooperate with a suction cup or a mechanical clamping jaw of automatic equipment.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery assembly auxiliary tools and relates to a positioning device, in particular to a lithium battery bar welding positioning device. Background Art

[0002] The bar (copper bar or aluminum bar) is one of the commonly used components in power batteries. It is installed in the mounting groove on the isolation plate to connect the power battery cells. Its performance will affect the performance and life of the power battery. The Chinese utility model patent with application number 202220639215.8 discloses a bus and a battery module. Among them, the bus includes a bus body, and the bus body is provided with a plurality of bar mounting positions for installing the bar, and the bus body is provided with a plurality of nickel sheet mounting positions. The nickel sheet mounting positions correspond to the bar mounting positions one by one and are interconnected. The nickel sheet is horizontally arranged in the nickel sheet mounting position and is connected to the bar. In this application, the bar depends on the bar mounting position for installation, so it is necessary to design and use a special-shaped bus body, which has a complex structure and high cost. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a lithium battery tab welding positioning device.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a lithium battery bar welding positioning device, which comprises:

[0005] An outer protective plate, wherein a plurality of first through holes arranged at intervals are formed on the outer protective plate;

[0006] The positioning mechanism includes a limit clamping strip, an insulating substrate, a positioning protrusion and a positioning column.

[0007] The insulating substrate is detachably mounted on the surface of the outer protection plate, and a plurality of second through holes corresponding to the first through holes are formed on the insulating substrate;

[0008] The surface of the insulating substrate in contact with the outer protection plate is defined as the outer surface, and the surface away from the outer protection plate is defined as the inner surface;

[0009] The positioning protrusion is formed on the inner surface of the insulating substrate;

[0010] The limit clamping strips are at least one pair, and they are arranged at intervals on the inner surface of the insulating substrate or the positioning protrusion;

[0011] The positioning posts are formed at four corners of the inner surface of the insulating substrate.

[0012] Optimally, a first convex strip is formed at any long side of the inner surface of the insulating substrate, and a plurality of first mounting holes arranged at intervals are opened on the first convex strip, a spring plunger is installed in each of the first mounting holes, and at least one of the limit clips is arranged on the first convex strip.

[0013] Furthermore, a plurality of grooves corresponding to the mounting holes and cooperating with the spring plungers are formed on the inner surface of the insulating substrate.

[0014] Furthermore, a second convex strip located inside the first convex strip is formed on the inner surface of the insulating substrate, the second convex strip is higher than the positioning protrusion, and a plurality of second mounting holes corresponding to the first mounting holes are formed on the second convex strip.

[0015] Furthermore, the positioning posts include two first positioning posts and two second positioning posts; the two first positioning posts are square posts, which are located at two ends of the first convex strip.

[0016] Optimally, limiting protrusions extending outward and spaced apart from the first convex strips are formed on both side surfaces of the positioning protrusion.

[0017] Furthermore, a surface of the limiting protrusion facing the first protrusion is a first outer inclined surface.

[0018] Furthermore, the second positioning column includes a column base plate formed on the outer surface of the insulating substrate and a column body formed on the column base plate, and the column base plate has an inner surface parallel to the first convex strip and an outer surface matched with the first outer inclined surface.

[0019] Due to the application of the above-mentioned technical scheme, the utility model has the following advantages compared with the prior art: the lithium battery tab welding positioning device of the utility model divides the inner surface of the insulating substrate into two areas through the positioning protrusion, which can realize the simultaneous positioning of the double tabs, which is beneficial to improving work efficiency; at the same time, combined with the positioning column, limit card strip and other structures, the positioned double tabs can be accurately transferred to the battery housing to be welded to the battery pole through the through hole, so that not only can the positioning mechanism be protected by the external protective plate, but also the structure is simple, economical and easy to cooperate with the suction cup or mechanical clamp of the automation equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the application of the lithium battery tab welding positioning device of the utility model;

[0022] Figure 2 This is a cross-sectional view of the lithium battery tab welding positioning device of the utility model when in use;

[0023] Figure 3 It is a structural schematic diagram of the positioning mechanism in the lithium battery tab welding positioning device of the utility model;

[0024] Figure 4 It is a schematic diagram of installing the tab of the positioning mechanism in the lithium battery tab welding positioning device of the present invention. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0028] like Figure 1 and Figure 2 As shown, the lithium battery tab welding positioning device 1 of the present application can transfer the tab 2 to the square power battery 3 for welding, thereby using laser to achieve welding of the tab 2 and the pole 33.

[0029] The power battery 3 is in a cubic shape as a whole, and includes a battery housing 31 and a cover plate 32 fixed at the opening of the battery housing 31. Two poles 33 are mounted on the cover plate 32, and as conventional, the cover plate 32 is also provided with an injection hole, an explosion-proof valve and other structures.

[0030] The bar sheet 2 includes a sheet body 21 and an outer extension body 22 formed on the side of the sheet body 21 and in the same plane as the sheet body 21 (the formation method can be conventional, such as welding or integral molding, the same below). The sheet body 21 is a thin square sheet body (can be a rectangular parallelepiped or a cube) as a whole, and its four corners are rounded; a welding hole 211 is provided on the sheet body 21 for cooperating with the pole 33 for welding there, and a first through hole 212 spaced apart from the welding hole 211 can also be provided according to actual needs. The outer extension body 22 is generally an arc-shaped structure, one end of which is integrally formed with the end of the sheet body 21 and the free end extends outward and is provided with a second through hole 221; a certain gap or limited space is formed between the outer extension body 22 and the sheet body 21.

[0031] The utility model lithium battery bar welding positioning device, such as Figure 3 and Figure 4 , including matching structures such as an outer protection plate 11 and a positioning mechanism 12.

[0032] Among them, a plurality of first through holes 111 are arranged at intervals on the outer protection plate 11. In the present embodiment, there are two first through holes 111 for allowing the laser to pass through. The outer protection plate 11 mainly serves to protect the positioning mechanism 12 and prevent the positioning mechanism 12 from being burned by the laser. The material thereof is usually metal, such as copper.

[0033] The positioning mechanism 12 is used for accurately clamping the bar 2 and cooperating with the power battery 3 , and includes a limit clamping strip 120 , an insulating substrate 121 , a positioning protrusion 122 , a positioning column, and the like.

[0034] The insulating substrate 121 is detachably mounted on the surface of the outer protection plate 11, and is provided with a plurality of second through holes 1213 corresponding to the first through holes 111 (there are also two second through holes 1213 for the laser to pass through). The surface of the insulating substrate 121 in contact with the outer protection plate 11 is defined as the outer surface, and the surface away from the outer protection plate 11 is defined as the inner surface (when in use, when the bar 2 is positioned in the positioning mechanism 12, the positioning mechanism 12 is transferred so that the positioning mechanism 12 can be accurately stuck on the power battery 3, so that the outer protection plate 11 is at the outermost side of the power battery 3). Since the power battery 3 is in the shape of a cube as a whole, the outer protection plate 11 and the insulating substrate 121 are both square sheet structures.

[0035] The positioning protrusion 122 is formed in the middle of the inner surface of the insulating substrate 121 (i.e., the surface away from the outer protection plate 11), so that the two second through holes 1213 are located on both sides of the positioning protrusion 122, so that the inner side of the insulating substrate 121 can be separated into two relatively independent spaces. At this time, the two side surfaces of the positioning protrusion 122 (corresponding to the second through holes 1213) can be respectively used as the limiting surfaces of the two tabs 2 (such as Figure 4As shown), a side surface of the bar sheet 2 (a common side surface of the sheet body 21 and the outer extension body 22) can be pressed against one of the side surfaces and be restrained.

[0036] There is at least one pair of limit bars 120 (one pair in this embodiment), which are arranged at intervals on the inner surface of the insulating substrate 121 or the positioning protrusion 122. The spacing between the pair of limit bars 120 is consistent with the thickness of the power battery 3, so when the positioning device is transferred to the power battery 3, the pair of limit bars 120 can just match the two surfaces of the power battery 3. There are four positioning columns, which are formed at the four corners of the inner surface of the insulating substrate 121; the two positioning columns located on the same side of the positioning protrusion 122 can just abut against the other two side surfaces of the sheet 21; and when the positioning device is transferred to the power battery 3, the four positioning columns just abut against the four corners of the power battery 3 (opposite to the position of the cover plate 32).

[0037] It can be seen that the above-mentioned lithium battery bar welding positioning device 1 can realize the simultaneous positioning of the double bar 2, which is beneficial to improving work efficiency; at the same time, combined with the positioning column, the limit clip 120 and other structures, the positioned double bar 2 can be accurately transferred to the power battery 3 to be welded with the battery pole through the through hole. In this way, not only can the positioning mechanism be protected by the external protective plate, but also the structure is simple, the economy is good and it is easy to cooperate with the suction cup or mechanical clamp of the automation equipment.

[0038] In this embodiment, a first convex strip 1212 is formed at any long side of the inner surface of the insulating substrate 121, and a plurality of first mounting holes arranged at intervals are provided in the area of ​​the first convex strip 1212 that is not blocked by the positioning protrusion 122, and a spring plunger 126 is installed in each first mounting hole, so that the bar 2 can be pressed by the spring plunger 126 installed in the first mounting hole. A plurality of grooves 1214 corresponding to the mounting holes 125 and cooperating with the spring plunger 126 are provided on the inner surface of the insulating substrate 121 to improve the degree of pressing the bar 2. At this time, one limit clamping strip 120 is provided on the first convex strip 1212, and another limit clamping strip 120 is provided at the edge of the inner surface of the positioning protrusion 122 (i.e., the surface away from the insulating substrate 121), so as to maximize the use of the width of the insulating substrate 121. In addition, a second ridge 1211 located inside the first ridge 1212 (the first ridge 1212 and the second ridge 1211 are in contact with each other) may be formed on the inner surface of the insulating substrate 121. The second ridge 1211 may be set to be higher than the positioning protrusion 122 according to actual needs. The second ridge 1211 is provided with a plurality of second mounting holes 125 corresponding to the first mounting holes.

[0039] In this embodiment, the two side surfaces of the positioning protrusion 122 are formed with a limiting protrusion 1221 extending outward and spaced apart from the first protrusion 1212. The limiting protrusion 1221 and the positioning protrusion 122 are in the same plane, so they are also located on the inner surface of the insulating substrate 121; however, the limiting protrusion 1221 is spaced apart from the first protrusion 1212, so that a space for accommodating the tab 2 is formed therebetween. In order to better limit the position of the external extension body 22, the surface of the limiting protrusion 1221 facing the first protrusion 1212 is a first outer inclined surface. When the tab 2 is placed in the aforementioned space, the first outer inclined surface will at least partially contact the outer side surface of the external extension body 22 for limiting the position.

[0040] In this embodiment, the positioning posts include two first positioning posts 123 and two second positioning posts 124. The two first positioning posts 123 are square posts, which are located at both ends of the first convex strip 1212, and play the role of limiting the position of the bar sheet 2 and clamping and positioning the power battery 3 during transfer. The other two second positioning posts 124 are arranged corresponding to the two first positioning posts 123. Each second positioning post 124 includes a column base plate 1241 formed on the outer surface of the insulating substrate 121 and a column body 1242 formed on the column base plate 1241. The column base plate 1241 has an inner surface parallel to the first convex strip 1212 and an outer surface matched with the first outer inclined surface. This column base plate 1241 can just be inserted into the gap (or limiting space) formed between the outer extension body 22 and the sheet body 21, so that the bar sheet 2 can be limited from up to 5 degrees of freedom to ensure its accurate positioning and rapid positioning.

[0041] When in use, the power battery 3 is first positioned and fixed with the pole 33 facing upward; then the outer protective plate 11 is positioned and fixed so that the positioning mechanism 12 faces upward; then the bar 2 is pressed downward into the positioning mechanism 12 to achieve five-degree-of-freedom limiting, and the bar is compressed by the spring plunger 126; the entire welding positioning device 1 is turned over (together with the bar 2), and then vertically buckled on the power battery 3. The limiting strip 120 and the positioning column can ensure that the welding positioning device 1 (together with the bar 2) is accurately positioned on the power battery 3. The laser is injected from the through hole to weld the bar 2 and the pole 33. After the welding is completed, the automated equipment (such as a suction cup or a mechanical gripper) will take away the welding positioning device 1 for recycling. It has a simple structure, good stability, high precision and good economy.

[0042] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A lithium battery tab welding positioning device, characterized in that: It includes: An outer protective plate (11), wherein the outer protective plate (11) is provided with a plurality of first through holes (111) arranged at intervals; A positioning mechanism (12), the positioning mechanism (12) comprising a limit clamping strip (120), an insulating substrate (121), a positioning protrusion (122) and a positioning column, The insulating substrate (121) is detachably mounted on the surface of the outer protection plate (11), and a plurality of second through holes (1213) corresponding to the first through holes (111) are provided on the insulating substrate (121); The surface of the insulating substrate (121) in contact with the outer protection plate (11) is defined as the outer surface, and the surface facing away from the outer protection plate (11) is defined as the inner surface; The positioning protrusion (122) is formed on the inner surface of the insulating substrate (121); The limiting clamping strips (120) are at least a pair, and are arranged at intervals on the inner surface of the insulating substrate (121) or the positioning protrusion (122); The positioning posts are formed at four corners of the inner surface of the insulating substrate (121).

2. The lithium battery tab welding positioning device according to claim 1, characterized in that: A first convex strip (1212) is formed at any long side of the inner surface of the insulating substrate (121), a plurality of first mounting holes arranged at intervals are provided on the first convex strip (1212), a spring plunger (126) is installed in each of the first mounting holes, and at least one of the limit clamping strips (120) is arranged on the first convex strip (1212).

3. The lithium battery tab welding positioning device according to claim 2, characterized in that: A plurality of grooves (1214) corresponding to the mounting holes (125) and matching the spring plungers (126) are provided on the inner surface of the insulating substrate (121).

4. The lithium battery tab welding positioning device according to claim 2, characterized in that: A second convex strip (1211) is formed on the inner surface of the insulating substrate (121) and is located inside the first convex strip (1212); the second convex strip (1211) is higher than the positioning protrusion (122); and a plurality of second mounting holes (125) corresponding to the first mounting holes are formed on the second convex strip (1211).

5. The lithium battery tab welding positioning device according to claim 2 or 4, characterized in that: The positioning columns comprise two first positioning columns (123) and two second positioning columns (124); the two first positioning columns (123) are square columns, which are located at both ends of the first convex strip (1212).

6. The lithium battery tab welding positioning device according to claim 5, characterized in that: Position limiting protrusions (1221) extending outwards and spaced apart from the first protrusion (1212) are formed on both side surfaces of the positioning protrusion (122).

7. The lithium battery tab welding positioning device according to claim 6, characterized in that: The surface of the limiting protrusion (1221) facing the first protrusion (1212) is a first outer inclined surface.

8. The lithium battery tab welding positioning device according to claim 7, characterized in that: The second positioning column (124) comprises a column base plate (1241) formed on the outer surface of the insulating substrate (121) and a column body (1242) formed on the column base plate (1241); the column base plate (1241) has an inner surface parallel to the first convex strip (1212) and an outer surface matching the first outer inclined surface.

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