Protective clamp for battery welding

Abstract

The utility model belongs to the technical field of battery cell welding, and particularly relates to a protective clamp for battery welding, which comprises a battery cell bearing seat, a battery cell fixing seat, a battery cell fixing seat and a battery cell fixing seat. One side of the cover plate is movably connected with the side edge of the battery cell bearing seat; and after the battery cell bearing seat is covered by the cover plate, the tabs of the battery cell extend out of the tab positioning openings, and a battery cell accommodating closed space is formed in the accommodating area after the battery cell bearing seat is covered by the cover plate. Through covering of the cover plate and the battery cell bearing seat, the tabs of the battery cell extend out of the tab positioning openings to form a closed battery cell accommodating space, so that permeation of dust particles in the welding process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core welding, in particular to a protective clamp for battery welding. Background Art

[0002] Among the many failure modes of lithium batteries, internal short circuits in single cells are undoubtedly the most harmful and the most difficult to predict and analyze. There is no way to protect them through external control circuits. The positive and negative tabs of lithium batteries need to be connected and formed by ultrasonic welding during the production process. During large-scale welding, metal shavings and dust particles will be generated in the welding area, especially when the tabs are the parts extending from the positive and negative foils of the battery and are used to connect to the external circuit. The arc-shaped transition tab shape will affect the wetting efficiency of the electrolyte and its arc area is prone to bring in dust particles, which will cause internal short circuits in the battery and cause safety accidents.

[0003] Therefore, in order to solve the problem that dust and impurities enter the battery cell during welding due to the shape of the foil tab, it is necessary to design a protective fixture for battery welding. Utility Model Content

[0004] In order to solve the technical problems mentioned in the background technology, the utility model provides a protective clamp for battery welding, comprising:

[0005] The battery cell support seat is provided with a storage area for placing the battery cell, and a tab positioning opening is provided on one side of the storage area;

[0006] A cover plate, one side of which is movably connected to the side of the battery cell support seat;

[0007] After the cover plate covers the battery cell supporting seat, the tabs of the battery cell extend out from the tab positioning opening, and the covered accommodation area forms a closed space for accommodating the battery cell.

[0008] Furthermore, sealing thresholds are provided on both sides of the tab positioning opening and at the edge of the accommodating area;

[0009] A sealing strip is provided on the covering surface of the cover plate at a position corresponding to the sealing threshold;

[0010] When the cover plate is closed, the sealing strip is embedded in the sealing threshold to form a closed space for accommodating the battery core.

[0011] Furthermore, the width of the sealing threshold does not exceed 0.6 mm.

[0012] Furthermore, the tab positioning opening is in a straight shape.

[0013] Furthermore, one side of the cover plate is connected to a side of the battery cell support seat via a hinge assembly.

[0014] Furthermore, the hinge assembly includes: at least one flip seat extending from the side of the cover plate, and hinged by a flip pin located on the side of the battery cell supporting seat.

[0015] Furthermore, a limiting component is connected to the battery cell supporting seat to limit the accommodating area.

[0016] Furthermore, waist-shaped through holes are provided at corresponding positions of the battery cell supporting seat and the limiting assembly, and the two are connected by a movable bolt, and the movable bolt is slidably limited along the long side direction of the waist-shaped through hole.

[0017] Further, the limiting assembly includes: a first limiting portion, a second limiting portion and a third limiting portion;

[0018] The first limiting portion is provided on a side opposite to the battery cell supporting seat and the tab positioning opening;

[0019] The second limiting portion and the third limiting portion are symmetrically arranged on both sides of the accommodating area.

[0020] Furthermore, the first limiting portion is two stop blocks arranged opposite to the sides of the battery cell supporting seat.

[0021] The beneficial effect of the utility model is that the utility model places the battery cell in the accommodating area of ​​the battery cell supporting seat, and one side of the cover plate is connected to the side of the battery cell supporting seat to achieve a snap fit, and the battery cell tabs extend from the tab positioning ports to form a closed battery cell accommodating space, thereby reducing the penetration of dust during welding to improve the sealing effect.

[0022] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1Shows a schematic diagram of the structure of a battery welding protective fixture according to some embodiments;

[0026] Figure 2 Shows a side view of a battery welding protective fixture according to some embodiments;

[0027] Figure 3 Shows a closed state diagram of a battery welding protective fixture according to some embodiments;

[0028] Figure 4 Shows a cross-sectional view of a battery welding protective fixture according to some embodiments;

[0029] In the figure:

[0030] 1. Lug positioning port, 2. Cell bearing seat, 4. Limiting assembly, 5. Turning seat, 6. Turning pin, 8. Cover plate, 11. Sealing strip, 12. Sealing threshold, 10. Accommodating area, 7. Waist-shaped through hole, 71. Joint bolt, 41. First limiting part, 42. Second limiting part, 43. Third limiting part, 50. Articulated assembly. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described 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.

[0032] like Figures 1 to 3 As shown, at least one embodiment provides a protective clamp for battery welding, including a battery cell supporting seat 2, which is provided with a accommodating area 10 for placing the battery cell, and a pole lug positioning opening 1 is provided on one side of the accommodating area 10; a cover plate 8, one side of which is movably connected to the side of the battery cell supporting seat 2; after the cover plate 8 covers the battery cell supporting seat 2, the pole lug of the battery cell extends out from the pole lug positioning opening 1, and the accommodating area 10 after covering forms a closed space for accommodating the battery cell.

[0033] In some embodiments, the battery cell is placed in the accommodating area 10 of the battery cell supporting seat 2, so that the pole ear of the battery cell is guided to the pole ear positioning port 1, wherein one side of the cover plate 8 is movably connected to the side of the battery cell supporting seat 2, covering the battery cell supporting seat 2 to form a closed battery cell accommodating space, and the cover plate can fit tightly to the battery cell supporting seat to reduce gaps and openings, thereby effectively isolating the battery cell from dust and particulate matter.

[0034] like Figure 4As shown, in some embodiments, sealing thresholds 12 are provided on both sides of the tab positioning opening 1 and at the edge of the accommodating area 10; a sealing strip 11 is provided on the covering surface of the cover plate 8 at the position corresponding to the sealing threshold; when the cover plate 8 is covered, the sealing strip 11 is embedded in the sealing threshold 12 to form a closed space for accommodating the battery cell. When the cover plate 8 is covered on the battery cell support seat 2, the sealing strip 11 will be embedded in the sealing threshold 12. The cross-sectional design of the sealing strip should match the shape of the sealing threshold 12 so that the sealing strip can be correctly embedded in the groove to ensure that there is no gap or notch at the connection of the tab positioning opening 1. After the sealing strip 11 is embedded in the sealing threshold 12, a close contact is formed between the cover plate 8 and the battery cell support seat 2, thereby forming a continuous sealing interface between the cover plate 8 and the battery cell support seat 2, significantly improving the dustproof performance.

[0035] In some embodiments, the width of the sealing threshold 12 does not exceed 0.6 mm.

[0036] In some embodiments, the tab locating opening 1 is straight in shape. The sealing strip 11 on the cover plate 8 can be designed to be straight so as to closely match the edge of the locating opening 1 to ensure that the sealing strip 11 can form a seal on a plane when the cover plate 8 is closed.

[0037] In some embodiments, one side of the cover plate 8 is connected to the side of the battery cell support seat 2 through a hinge assembly 50. The hinge assembly 50 includes: at least one flip seat 5 extending from the side of the cover plate, and is hinged through a flip pin 6 located on the side of the battery cell support seat 2. The hinge system formed by the flip seat 5 and the flip pin 6 allows the cover plate 8 to be opened and closed relative to the battery cell support seat 2, and when the cover plate 8 is opened, the battery cell can be placed in or taken out.

[0038] In some embodiments, the corresponding positions of the battery cell support seat 2 and the limiting assembly 4 are both provided with a waist-shaped through hole 7, and the two are connected by a movable bolt 71, and the movable bolt 71 is slidably limited along the long side direction of the waist-shaped through hole 7. The limiting assembly 4 is connected to the battery cell support seat 2 to limit the accommodating area 10. The limiting assembly 4 includes: a first limiting portion 41, a second limiting portion 42 and a third limiting portion 43; the first limiting portion 41 is provided on the side opposite to the battery cell support seat 2 and the tab positioning port 1; the second limiting portion 42 and the third limiting portion 43 are symmetrically arranged on both sides of the accommodating area 10. The limiting assembly ensures the correct position of the battery cell in the accommodating area 10 to prevent the battery cell from moving or rotating during assembly or transportation. The waist-shaped through hole 7 allows the movable bolt 71 to slide along its long side direction, providing flexibility of adjustment to accommodate battery cells of different sizes. By means of the sliding limiting function of the movable bolt 71 , the battery cell support 2 and the limiting assembly 4 can be conveniently fixed at appropriate positions, thus simplifying the assembly process.

[0039] In some embodiments, the first limiting portion 41 is two stop blocks disposed opposite to each other on the sides of the battery cell supporting seat 2 .

[0040] In summary, the utility model places the battery cell in the accommodating area of ​​the battery cell supporting seat, and one side of the cover plate is connected to the side of the battery cell supporting seat to achieve a snap fit, and the pole lugs of the battery cell extend from the pole lug positioning ports to form a closed battery cell accommodating space, thereby reducing the penetration of dust during welding to improve the sealing effect.

[0041] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] 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.

[0043] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. With the above-mentioned ideal embodiments of the utility model as inspiration, through the above-mentioned description, relevant staff can make various changes and modifications without departing from the scope of the technical idea of ​​the utility model. The technical scope of the utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A protective fixture for battery welding, characterized in that: include: A battery cell support seat (2) is provided with a storage area (10) for placing the battery cell, and a tab positioning opening (1) is provided on one side of the storage area (10); A cover plate (8), one side of which is movably connected to a side of the battery cell support seat (2); After the cover plate (8) covers the battery cell support seat (2), the tabs of the battery cell extend out from the tab positioning opening (1), and the covered accommodation area (10) forms a closed space for accommodating the battery cell; The battery cell support seat (2) is connected to a limiting component (4) to limit the accommodating area (10); The battery cell support seat (2) and the limiting assembly (4) are both provided with waist-shaped through holes (7) at corresponding positions, and the two are connected by a movable bolt (71), and the movable bolt (71) is slidably limited along the long side direction of the waist-shaped through hole (7); The limiting assembly (4) comprises: a first limiting portion (41), a second limiting portion (42) and a third limiting portion (43); The first limiting portion (41) is provided on a side opposite to the battery cell support seat (2) and the tab positioning opening (1); The second limiting portion (42) and the third limiting portion (43) are symmetrically arranged on two sides of the accommodating area (10).

2. The protective clamp according to claim 1, characterized in that: Sealing thresholds (12) are provided on both sides of the tab positioning opening (1) and at the edge of the accommodating area (10); A sealing strip (11) is provided on the covering surface of the cover plate (8) at a position corresponding to the sealing threshold; When the cover plate (8) is closed, the sealing strip (11) is embedded in the sealing threshold (12) to form a closed space for accommodating the battery cell.

3. The protective clamp according to claim 2, characterized in that: The width of the sealing threshold (12) does not exceed 0.6 mm.

4. The protective clamp according to claim 1, characterized in that: The tab positioning opening (1) is in a straight shape.

5. The protective clamp according to claim 1, characterized in that: One side of the cover plate (8) is connected to the side of the battery cell support seat (2) via a hinge assembly (50).

6. The protective clamp according to claim 5, characterized in that: The hinge assembly (50) comprises: at least one flip seat (5) extending from the side of the cover plate, and hinged via a flip pin (6) located on the side of the battery cell support seat (2).

7. The protective clamp according to claim 1, characterized in that: The first limiting portions (41) are two stop blocks arranged opposite to the sides of the battery cell supporting seat (2).

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