Soft package lithium battery pack for electric vehicle

Abstract

The soft package lithium battery pack for the electric vehicle comprises an aluminum barrel shell, a waterproof shell body is installed in the aluminum barrel shell, a battery body is installed in the waterproof shell body, a protection plate body is arranged on one side of the battery body, and a triangular connector is installed on one side of the protection plate body; a side cover is installed on one side of the waterproof shell upper cover, a quick charging head is arranged on one side outside the side cover, and a bottom cover is installed on the other side of the waterproof shell body. Compared with an existing device, the soft package lithium battery pack for the electric vehicle has the advantages that an inner hole of the support is provided with a chamfer convenient for a battery cell to insert, the upper part of the support is provided with a groove used for installing a protection plate and a protection plate wiring board, the groove of the support is provided with a screw hole used for fixing the protection plate, and the waterproof shell comprises a waterproof shell upper cover and a waterproof shell lower bottom. The flame-retardant resin plate is used for fixing, the waterproof film is externally molded, waterproof treatment is performed, and the waterproof shell is arranged in the waterproof shell upper cover and the waterproof shell main body, so that complete waterproof treatment can be performed.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery PACK, in particular to a soft-pack lithium battery pack for electric vehicles. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloys as the positive and negative electrode materials and a non-aqueous electrolyte solution. With the development of the economy and technology, the country has also increased its requirements for environmental protection. As an emerging clean energy source, lithium batteries are gradually being recognized by the market.

[0003] Currently, existing lithium-ion battery packs have complex internal wiring, posing significant safety risks. Smaller lithium-ion battery packs of the same specifications present greater safety risks due to reduced internal space. Larger lithium-ion battery packs, while providing safety, do not fully meet market demand. Therefore, we propose a soft-pack lithium-ion battery pack for electric vehicles. Utility Model Content

[0004] The purpose of the present utility model is to provide a soft-pack lithium battery pack for electric vehicles to solve the problems raised in the above background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions: a soft-pack lithium battery pack for electric vehicles, comprising:

[0006] An aluminum barrel shell, wherein a waterproof shell body is installed inside the aluminum barrel shell, and a battery body is installed inside the waterproof shell body, a protective plate body is provided on one side of the battery body, and a herringbone connector is installed on one side of the protective plate body;

[0007] The waterproof shell upper cover is installed on one side of the waterproof shell main body. A side cover is installed on one side of the waterproof shell upper cover, and a fast charging head is provided on one side outside the side cover. The bottom cover is installed on the other side of the waterproof shell main body.

[0008] Preferably, the battery bodies are relatively fixed by an integrated bracket, the battery bodies and the bracket are welded together, and the battery bodies are isolated from each other by the bracket.

[0009] Preferably, the protection plate body is fixed to the bracket by bolts, and the protection plate body is welded to the protection plate sub-plate.

[0010] Preferably, a flame retardant resin plate is provided on the outside of the battery body, and a waterproof film is provided on the outside of the flame retardant resin plate, and a surrounding structure is formed between the waterproof shell body and the waterproof shell upper cover and the battery body.

[0011] Preferably, the fast charging head, the side cover and the herringbone joint are connected to each other by bolts.

[0012] Preferably, the aluminum barrel shell and the waterproof shell upper cover, the protective plate body, the waterproof shell main body battery body and the protective plate sub-plate form a semi-enclosed structure, and the side cover is relatively fixed to the bottom cover by bolts.

[0013] Compared with the prior art, the present invention provides a soft-pack lithium battery pack for electric vehicles, which has the following beneficial effects:

[0014] The bracket used in this utility model is made of ABS flame retardant V0 grade. The inner hole of the bracket is chamfered to facilitate the insertion of the battery cell. There is a groove on the upper part of the bracket for installing the protection plate and the protection plate wiring board. The bracket groove is provided with screw holes for fixing the protection plate. The waterproof shell includes a waterproof shell upper cover and a waterproof shell lower bottom. After the battery pack is assembled, it is fixed with a flame retardant resin plate, and a waterproof film is plasticized on the outside to perform waterproof treatment. It is then installed in the waterproof shell upper cover and the waterproof shell main body to perform complete waterproof treatment. The lithium battery pack of this utility model adopts an automated process, which significantly reduces production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the explosion structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the internal battery pack structure of the present invention;

[0018] Figure 4 This is a schematic structural diagram of the bracket of the utility model.

[0019] In the figure: 1. Aluminum barrel shell; 2. Side cover; 3. Waterproof shell upper cover; 4. Pin connector; 5. Protective board body; 6. Waterproof shell body; 7. Bottom cover; 8. Battery body; 9. Protective board sub-board; 10. Fast charging head. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-4, a soft-pack lithium battery pack for electric vehicles, comprising: an aluminum barrel shell 1, a waterproof shell body 6 is installed inside the aluminum barrel shell 1, and a battery body 8 is installed inside the waterproof shell body 6, a protection plate body 5 is provided on one side of the battery body 8, and a pin-shaped connector 4 is installed on one side of the protection plate body 5; the fast charging head 10 is connected to the side cover 2 and the pin-shaped connector 4 by bolts; the battery bodies 8 are relatively fixed by an integrated bracket, and the battery body 8 and the bracket are welded, and the battery bodies 8 are isolated from each other by the bracket; the protection plate body 5 is fixed to the bracket by bolts, and the protection plate body 5 is welded to the protection plate sub-plate 9; the bracket material is ABS flame retardant V0 grade, the inner hole of the bracket is chamfered to facilitate the insertion of the battery cell, the upper part of the bracket is provided with a groove for installing the protection plate and the protection plate wiring board, and the bracket groove is provided with screw holes, Used to fix the protective plate; the waterproof shell upper cover 3 is installed on one side of the waterproof shell main body 6, and a side cover 2 is installed on one side of the waterproof shell upper cover 3, and a fast charging head 10 is provided on the side outside the side cover 2, and a flame retardant resin plate is provided on the outside of the battery main body 8, and a waterproof membrane is provided on the outside of the flame retardant resin plate, and a surrounding structure is formed between the waterproof shell main body 6 and the waterproof shell upper cover 3 and the battery main body 8; a bottom cover 7 is installed on the other side of the waterproof shell main body 6; a semi-enclosed structure is formed between the aluminum barrel shell 1 and the waterproof shell upper cover 3, the protective plate body 5, the waterproof shell main body 6, the battery main body 8 and the protective plate sub-plate 9, and the side cover 2 is relatively fixed to the bottom cover 7 by bolts; the waterproof shell includes a waterproof shell upper cover 3 and a waterproof shell bottom. After the battery pack is assembled, it is fixed with a flame retardant resin plate, and a waterproof membrane is molded on the outside to perform waterproof treatment. It is then installed in the waterproof shell upper cover 3 and the waterproof shell main body 6 to perform complete waterproof treatment.

[0022] Working principle: When using the soft-pack lithium battery pack for electric vehicles, first the battery pack is a 48V30AH battery pack. An integrated bracket is used between the battery packs to securely fix the battery cells. The welding adopts automated laser welding, which is firm, efficient, and the welding points are more beautiful. There are brackets to isolate the battery cells, making welding safer. After the battery pack is assembled, the protection plate sub-plate 9 is inserted into the reserved slot of the integrated bracket, the bottom is fastened with screws, and the ear welding is performed with automatic welding. After welding is completed, the protection plate body 5 is fixed to the bracket with screws, and the cable is plugged in to connect the two. After the side sub-plate and the battery main body 8 are assembled, they are fixed with flame-retardant resin plates, plasticized with waterproof film on the outside, waterproofed, and installed in the waterproof shell upper cover 3 and the waterproof shell main body 6 for complete waterproofing. Then the fast charging head 10 side cover 2 and the pin-shaped joint 4 are assembled and fastened together with screws. Finally, the waterproof shell upper cover 3, the protective plate body 5, the waterproof shell main body 6, the battery main body 8 and the protective plate sub-plate 9 are placed in the aluminum barrel shell 1, and then the side cover 2 and the bottom cover 7 are fastened with screws. This is the working principle of the soft-pack lithium battery pack for electric vehicles.

[0023] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A soft-pack lithium battery pack for electric vehicles, characterized in that: include: An aluminum barrel shell (1), wherein a waterproof shell body (6) is installed inside the aluminum barrel shell (1), and a battery body (8) is installed inside the waterproof shell body (6), a protection plate body (5) is provided on one side of the battery body (8), and a herringbone connector (4) is installed on one side of the protection plate body (5); A waterproof housing upper cover (3) is installed on one side of the waterproof housing main body (6); a side cover (2) is installed on one side of the waterproof housing upper cover (3), and a fast charging head (10) is provided on one side outside the side cover (2); and a bottom cover (7) is installed on the other side of the waterproof housing main body (6).

2. The soft-pack lithium battery pack for electric vehicles according to claim 1, characterized in that: The battery bodies (8) are relatively fixed via an integrated bracket, the battery bodies (8) and the bracket are welded together, and the battery bodies (8) are isolated from each other via the bracket.

3. The soft-pack lithium battery pack for electric vehicles according to claim 1, characterized in that: The protection plate body (5) is fixed to the bracket via bolts, and the protection plate body (5) is welded to the protection plate sub-plate (9).

4. The soft-pack lithium battery pack for electric vehicles according to claim 1, characterized in that: The battery main body (8) is provided with a flame retardant resin plate on the outside, and a waterproof film is provided on the outside of the flame retardant resin plate. The waterproof shell main body (6), the waterproof shell upper cover (3) and the battery main body (8) form an enclosing structure.

5. The soft-pack lithium battery pack for electric vehicles according to claim 1, characterized in that: The fast charging head (10), the side cover (2) and the herringbone joint (4) are connected to each other via bolts.

6. The soft-pack lithium battery pack for electric vehicles according to claim 1, characterized in that: The aluminum barrel shell (1) and the waterproof shell upper cover (3), the protective plate body (5), the waterproof shell body (6), the battery body (8) and the protective plate sub-plate (9) form a semi-enclosed structure, and the side cover (2) is relatively fixed to the bottom cover (7) by bolts.

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