Battery cell protective film assembly

Abstract

The utility model discloses a battery cell protective film component, including upper template, lower template and mould column, the upper template is provided at the upper end of battery cell shell, the lower template is provided at the bottom of battery cell shell, the four corners of battery cell shell of square structure are provided with arc, and the mould column is provided with the arc. The upper ends and the lower ends of the four mold columns are fixedly connected with the upper mold plate and the lower wood mold plate through connecting structures respectively, arc-shaped structures with the same arc radian are arranged at the arc contact positions of the mold columns and the battery cell shell, and the film edges and the film inclined edges at the upper end and the lower end of the battery cell shell wrapping insulating film are pressed on the inner sides of the upper mold plate and the lower mold plate; by designing the cell outer film protection assembly composed of the upper mold plate, the lower mold plate and the mold column and covering the edge position of the insulating film by the protection assembly, the occurrence of edge curling of the insulating film is effectively avoided, and the insulativity of the surface of the cell is effectively ensured; meanwhile, the upper mold plate, the lower mold plate, the mold column and the battery cell shell form a standard rectangular structure, so that the battery cell is protected on the premise of not wasting space.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, in particular to a battery core protective film component. Background Art

[0002] It is an inevitable trend that new energy vehicles will gradually replace fuel vehicles. As the main power source in new energy vehicles, lithium-ion batteries need to be assembled in series and parallel before being installed to meet the requirements of high voltage and long driving range of the vehicle. However, the more battery cells there are in an electric car, the greater the risk. Therefore, increasing the capacity of the battery cells has become a research direction to increase the energy density of the battery cells and reduce the number of parallel groups. Only by making the battery into a flattened long strip shape can the capacity of the battery cell be increased and the heat dissipation performance be improved. During the process of coating the battery cell, the edge connection position of the film is prone to curling, and the bulge will affect the insulation of the outside of the battery. In view of the above problems, the utility model provides a solution. Utility Model Content

[0003] The utility model aims to provide a battery core protective film component.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] A battery cell protection film assembly comprises an upper template, a lower template and a mold column, wherein the upper template is arranged at the upper end of a battery cell shell, the lower template is arranged at the bottom of the battery cell shell, circular arcs are arranged at the four corners of the square-structured battery cell shell, the number of the mold columns is four, the upper and lower ends of the four mold columns are respectively fixedly connected to the upper template and the lower template by a connecting structure, an arc structure with the same arc curvature is arranged at the position where the mold column contacts the circular arc of the battery cell shell, the film edges and the oblique edges of the film at the upper and lower ends of the battery cell shell coating the insulating film are pressed on the inner sides of the upper template and the lower template, the side film edges of the insulating film of the battery cell shell coating the insulating film are located at the position where the mold column is pressed, and the upper template, the lower template and the mold column form a standard rectangular structure with the battery cell shell to protect the battery cell without wasting space.

[0006] Furthermore, the connecting structure includes a deformable pin arranged at the upper and lower ends of the mold column and a socket arranged below the upper template or above the lower template, the deformable pin is in a U-shaped structure, and two arc blocks are provided on the outer side of the deformable pin of the U-shaped structure, and arc grooves cooperating with the arc blocks are provided on both sides of the socket.

[0007] Furthermore, both the upper template and the lower template are provided with weight-reducing grooves, and the shapes and quantities of the weight-reducing grooves can be diversified, that is, the number can be multiple and the shapes can be various.

[0008] Furthermore, the weight-reducing grooves are staggered at the positions of the membrane edges and the oblique edges of the membrane, ensuring that the membrane edges and the oblique edges of the membrane are pressed and wrapped to avoid curling, thereby improving the insulation wrapping properties of the battery cell insulation film.

[0009] To sum up, the utility model has the following beneficial effects: the utility model designs a battery cell outer film protection component composed of an upper template, a lower template and a mold column, and the edge position of the insulating film is covered by the protection component, which can limitedly avoid the occurrence of curling of the insulating film, effectively ensure the insulation of the battery cell surface, and improve its life; at the same time, the upper template, the lower template and the mold column form a standard rectangular structure with the battery cell shell, thereby protecting the battery cell without wasting space. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the protective film frame;

[0011] Figure 2 It is a schematic diagram of the structure of the bottom coating of the battery cell;

[0012] Figure 3 yes Figure 2 A partial enlarged view of

[0013] Figure 4 It is a schematic diagram of the connection structure between the mold column and the membrane plate;

[0014] Figure 5 It is a schematic diagram of the bottom of the protective mold frame.

[0015] In the figure, 1, upper template; 2, lower template; 3, mold column; 4, weight reduction groove; 5, insulating film; 6, film edge; 7, deformation pin; 8, film oblique edge; 9, arc; 10, socket. DETAILED DESCRIPTION

[0016] The utility model is further described in detail below in conjunction with the accompanying drawings, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only 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.

[0017] like Figure 1-5As shown, a battery cell protection film assembly comprises an upper template 1, a lower template 2 and a mold column 3, wherein the upper template 1 is arranged at the upper end of a battery cell shell, the lower template 2 is arranged at the bottom of the battery cell shell, and circular arcs 9 are arranged at the four corners of the square structure of the battery cell shell. The number of the mold columns 3 is four, and the upper and lower ends of the four mold columns 3 are respectively fixedly connected to the upper template 1 and the lower template 2 by a connecting structure, and an arc structure with the same curvature of the arc 9 is arranged at the position where the mold column 3 contacts the circular arc 9 of the battery cell shell. The film edges 6 and the oblique edges 8 of the film at the upper and lower ends of the insulating film 5 coated on the battery cell shell are pressed on the inner sides of the upper template 1 and the lower template 2, and the side film edges of the insulating film 5 coated on the battery cell shell are located at the position where the mold column 3 is pressed, and the upper template 1, the lower template 2 and the mold column 3 form a standard rectangular structure with the battery cell shell to protect the battery cell without wasting space.

[0018] Further, such as Figure 3 As shown, the connection structure includes a deformable pin 7 arranged at the upper and lower ends of the mold column 3 and a socket 10 arranged below the upper template 1 or above the lower template 2, the deformable pin 7 is in a U-shaped structure, and two arc blocks are arranged on the outer side of the U-shaped deformable pin 7, and arc grooves cooperating with the arc blocks are arranged on both sides of the socket 10.

[0019] Furthermore, the upper template 1 and the lower template 2 are both provided with weight-reducing grooves 4, and the shapes and quantities of the weight-reducing grooves 4 can be diversified, that is, the number can be multiple and the shapes can be various.

[0020] Further, such as Figure 5 As shown, the weight-reducing groove 4 is staggered at the positions of the membrane edge 6 and the membrane oblique edge 8 to ensure that the membrane edge 6 and the membrane oblique edge 8 are pressed and wrapped to avoid curling, thereby improving the insulation wrapping of the battery cell insulation film 5.

[0021] Working principle: The utility model designs a battery cell outer film protection component composed of an upper template, a lower template and a mold column, and the edge position of the insulating film is covered by the protection component, which can limitedly avoid the occurrence of curling of the insulating film, effectively ensure the insulation of the battery cell surface and improve its life; the upper template, the lower template and the mold column form a standard rectangular structure with the battery cell shell, which protects the battery cell without wasting space.

[0022] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A battery cell protective film assembly, characterized in that: The invention comprises an upper template (1), a lower template (2) and a mold column (3), wherein the upper template (1) is arranged at the upper end of a cell shell, the lower template (2) is arranged at the bottom of the cell shell, and circular arcs (9) are arranged at the four corners of the cell shell of a square structure. The number of the mold columns (3) is four, and the upper and lower ends of the four mold columns (3) are respectively fixedly connected to the upper template (1) and the lower template (2) via a connecting structure, and an arc structure having the same arc as the arc (9) is arranged at the position where the mold column (3) contacts the circular arc (9) of the cell shell, and the film edges (6) and the film oblique edges (8) at the upper and lower ends of the insulating film (5) covering the cell shell are pressed on the inner sides of the upper template (1) and the lower template (2), and the side film edges of the insulating film (5) covering the cell shell are located at the pressed position of the mold column (3).

2. A battery cell protective film assembly according to claim 1, characterized in that: The connection structure comprises a deformable pin (7) arranged at the upper and lower ends of the mold column (3) and a socket (10) arranged below the upper mold plate (1) or above the lower mold plate (2); the deformable pin (7) is in a U-shaped structure; two arc clamping blocks are arranged on the outer side of the deformable pin (7) in the U-shaped structure; and arc clamping grooves cooperating with the arc clamping blocks are arranged on both sides of the socket (10).

3. A battery cell protective film assembly according to claim 2, characterized in that: The upper template (1) and the lower template (2) are both provided with weight-reducing grooves (4).

4. A battery cell protective film assembly according to claim 3, characterized in that: The weight-reducing groove (4) is arranged to be staggered with respect to the position of the membrane edge (6) and the membrane oblique edge (8).

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