Low-voltage 12V horizontal auxiliary battery structure

Abstract

The utility model relates to a low-voltage 12V horizontal auxiliary battery structure. Belongs to the technical field of preparation. The sheet metal pressing plate mainly solves the problem that the attaching degree of a heating film and a battery cell is not high due to the fact that a protruding reinforcing rib is arranged in the middle of an existing sheet metal pressing plate. The battery pack is mainly characterized by comprising battery cells, foam between the battery cells, a pressing plate, a lower box body, an upper cover seat, a BMS (Battery Management System), a heating film, a carrier assembly and an FPCB (Flexible Printed Circuit Board), and the contact surface of the pressing plate and the battery cell is an integral plane. The low-voltage 12V horizontal auxiliary battery has the characteristics that the fitting degree of the heating film and the battery cell is good, battery cell welding tools can be reduced, the weight of the lower box body is reduced, and the number of connector plugs is reduced, and is mainly used for the low-voltage 12V horizontal auxiliary battery.

Description

Technical Field

[0001] This utility model belongs to the field of low-voltage 12V horizontal auxiliary battery technology, specifically relating to a low-voltage 12V horizontal auxiliary battery structure. Background Technology

[0002] The existing low-voltage 12V horizontal auxiliary battery includes cells, inter-cell foam, pressure plates, a lower casing, an upper cover, a BMS, a heating film, a carrier assembly, and an FPCB. The pressure plates are made of sheet metal with a protruding reinforcing rib in the middle. The surface pressing the cells is not a completely flat plane, resulting in insufficient adhesion between the heating film and the cells. The carrier assembly is only designed for fixing to the casing, leading to insufficient support during cell welding. The lower casing uses ordinary injection-molded plastic; to ensure strength, the casing structure is complex, resulting in relatively heavy weight. Utility Model Content

[0003] The purpose of this invention is to provide a low-voltage 12V horizontal auxiliary battery structure that addresses the above-mentioned shortcomings by providing a heating film with good adhesion to the battery cell and reducing the need for battery cell welding fixtures.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows: a low-voltage 12V horizontal auxiliary battery structure, including a battery cell, inter-cell foam, pressure plate, lower housing, upper cover, BMS, heating film, carrier assembly and FPCB, characterized in that: the contact surface between the pressure plate and the battery cell is an integral plane.

[0005] In the technical solution of this utility model, the pressure plate is provided with a frame in the direction away from the contact surface with the battery cell, and the frame is provided with reinforcing ribs to support the contact surface.

[0006] The reinforcing ribs in the technical solution of this utility model are reinforcing ribs that are connected by horizontal and vertical intersections.

[0007] The pressure plate in the technical solution of this utility model is made of cast aluminum.

[0008] In the technical solution of this utility model, the carrier assembly is provided with a battery electrode welding surface that cooperates with the battery electrode tab, and welding support positions are provided on both sides of the battery electrode welding surface.

[0009] In the technical solution of this utility model, the welding support position is a triangular reinforcing rib extending from both sides of the welding surface of the battery cell tab.

[0010] The carrier assembly described in the technical solution of this utility model is made of PA6+GF20 material.

[0011] The lower housing in the technical solution of this utility model is made of PA6+GF65 material.

[0012] In the technical solution of this utility model, the lower housing is used to install the injection-molded nuts of the upper cover seat, pressure plate, and carrier assembly.

[0013] In the technical solution of this utility model, a heating film is provided between the battery cells; the heating film is divided into two heating films, which are respectively attached to the middle of the battery cells on both sides.

[0014] The beneficial effects of this utility model are as follows: 1. Since the pressure plate is made of cast aluminum and the contact surface with the battery cell is set as a whole plane with multiple reinforcing ribs in the middle, the tightness between the heating film and the battery cell can be guaranteed while reducing the weight of the pressure plate, provided that the performance is met; 2. Since the carrier assembly is made of PA6+GF20 material and has a battery cell tab welding surface that mates with the battery cell tab, and welding support positions are provided on both sides of the battery cell tab welding surface, the welding support positions play a supporting role during welding after the battery cell is assembled, which can simplify the tooling structure; 3. Since the lower housing is made of high-strength PA6+GF65 material, the spacing between the reinforcing ribs can be increased, which can reduce the weight of the lower housing while meeting the strength requirements; 4. Since a heating film is set between the battery cells, and the heating film is divided into two heating films, which are attached to the middle of the battery cells on both sides respectively, the number of connector plugs can be reduced and the cost can be reduced.

[0015] This invention features good adhesion between the heating film and the battery cell, reduces the need for battery cell welding fixtures, reduces the weight of the lower housing, and reduces the number of connector plugs. It is mainly used for low-voltage 12V horizontal auxiliary batteries. Attached Figure Description

[0016] Figure 1 This is an exploded view of the product of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the carrier assembly of this utility model. Figure 1 .

[0018] Figure 3 This is a schematic diagram of the structure of the carrier assembly of this utility model. Figure 2 .

[0019] Figure 4 This is a schematic diagram of the structure of the pressure plate of this utility model. Figure 1 .

[0020] Figure 5 This is a schematic diagram of the structure of the pressure plate of this utility model. Figure 2 .

[0021] Figure 6 This is a schematic diagram of the module structure of this utility model.

[0022] Figure 7 This is a schematic diagram of the box structure of this utility model. Figure 1 .

[0023] Figure 8 This is a schematic diagram of the box structure of this utility model. Figure 2 .

[0024] Figure 9 This is a schematic diagram of the product structure of this utility model.

[0025] In the diagram: 1-Upper cover; 2-Sealing ring; 3-Carrier assembly; 4-Battery cell; 5-Bottom foam; 6-Lower housing; 7-Heating film; 8-Heat insulation pad; 9-Pressure plate; 10-Welding support position. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings.

[0027] like Figures 1 to 4 As shown, an embodiment of a low-voltage 12V horizontal auxiliary battery structure is provided, which consists of a cell 4, inter-cell foam (not shown in the figure), bottom foam 5, pressure plate 9, lower housing 6, upper cover seat 1, sealing ring 2, BMS (not shown in the figure), heating film 7, heat insulation pad 8, carrier assembly 3, welding support position 10 and FPCB (not shown in the figure).

[0028] The pressure plate 9 is made of cast aluminum, and the surface in contact with the battery cell 4 is a large, single flat surface. A frame is provided along the edge of this large flat surface in the direction away from the contact surface with the battery cell 4. Reinforcing ribs, which are horizontally and vertically connected, support the contact surface within the frame. For structures containing a heating film, the heating film pressing surface needs to be a large, single surface to ensure proper adhesion to the battery cell.

[0029] The carrier assembly 3 is made of PA6+GF20 material. The lower housing 6 is used to install the upper cover seat 1, pressure plate 9, and injection-molded nuts of the carrier assembly 3. The carrier assembly 3 has a battery cell tab welding surface that mates with the battery cell tab, and welding support positions 10 are provided on both sides of the battery cell tab welding surface. The welding support position 10 is a triangular reinforcing rib extending from both sides of the battery cell tab welding surface, and the triangular reinforcing rib is the part of the carrier assembly 3 that exceeds the width of the battery cell 4. The carrier assembly is made of plastic parts, which can optimize the structure, increase the support positions during battery cell welding, and reduce tooling.

[0030] The lower housing 6 is made of PA6+GF65 material. Using high-strength materials simplifies the housing structure and reduces mold costs.

[0031] A heating film 7 is provided between the battery cells 4. The heating film 7 is divided into two heating films, which are respectively attached to the middle of the battery cells 4 on both sides.

[0032] The lower housing 6 of this utility model is made of high-strength PA6+GF65 material. It houses the upper cover seat 1, pressure plate 9, and carrier assembly 3, which are fitted with injection-molded nuts. Except for the aforementioned mounting positions, the remaining components feature large-spacing reinforcing ribs, achieving both strength requirements and reduced weight, while also being aesthetically pleasing. The heating film 7 consists of two heating films, each attached to the middle of the two battery cells 4. It is made from a single piece of material and installed using a flip-book method, reducing the number of connector plugs and lowering costs. The pressure plate is made of cast aluminum, with a single flat surface in contact with the battery cells. Multiple reinforcing ribs are incorporated in the middle, reducing weight while ensuring a tight fit between the heating film and the battery cells, while maintaining performance requirements. The carrier assembly is made of PA6+GF20 material, with positive and negative output copper busbars fixed to it using hot riveting. Except for the necessary battery cell tab welding surfaces, triangular reinforcing ribs extend from both sides, avoiding the battery cell tabs. These ribs provide support during welding after battery cell assembly, simplifying the tooling structure.

Claims

1. A low-voltage 12V horizontal auxiliary battery structure, comprising a battery cell (4), inter-cell foam, a pressure plate (9), a lower casing (6), an upper cover (1), a BMS, a heating film (7), a carrier assembly (3), and an FPCB, characterized in that: The contact surface between the pressure plate (9) and the battery cell (4) is a single plane.

2. The low-voltage 12V horizontal auxiliary battery structure according to claim 1, characterized in that: The pressure plate (9) has a frame facing away from the contact surface with the battery cell (4), and the frame has reinforcing ribs that support the contact surface.

3. The low-voltage 12V horizontal auxiliary battery structure according to claim 2, characterized in that: The reinforcing ribs are horizontally and vertically intersecting reinforcing ribs.

4. The low-voltage 12V horizontal auxiliary battery structure according to claim 3, characterized in that: The pressure plate (9) is made of cast aluminum.

5. A low-voltage 12V horizontal auxiliary battery structure according to any one of claims 1-4, characterized in that: The carrier assembly (3) is provided with a battery electrode welding surface that cooperates with the battery electrode tab, and welding support positions (10) are provided on both sides of the battery electrode welding surface.

6. The low-voltage 12V horizontal auxiliary battery structure according to claim 5, characterized in that: The welding support (10) is a triangular reinforcing rib extending from both sides of the welding surface of the battery cell tab.

7. A low-voltage 12V horizontal auxiliary battery structure according to claim 6, characterized in that: The carrier assembly (3) is made of PA6+GF20 material.

8. A low-voltage 12V horizontal auxiliary battery structure according to any one of claims 1-4 and 6-7, characterized in that: The lower housing (6) is made of PA6+GF65 material.

9. A low-voltage 12V horizontal auxiliary battery structure according to claim 8, characterized in that: The lower housing (6) is used to install the injection-molded nuts of the upper cover seat (1), pressure plate (9) and carrier assembly (3).

10. A low-voltage 12V horizontal auxiliary battery structure according to any one of claims 1-4, 6-7, and 9, characterized in that: A heating film (7) is provided between the battery cells (4); the heating film (7) is divided into two heating films, which are respectively attached to the middle of the battery cells (4) on both sides.

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