Pouch battery module

Abstract

The utility model discloses a kind of soft package battery module, including multiple battery modules, battery module is sequentially arranged between front end plate and rear end plate, the both sides of battery module are provided with positive electrode support and negative electrode support respectively, busbar is set on end face fixed plate, busbar carries out electrical connection with the positive electrode tab of one soft package battery and the negative electrode tab of another soft package battery, the both sides of busbar are positive busbar and negative busbar, positive busbar is set on positive electrode support, negative busbar is set on negative electrode support, positive busbar is electrically connected with the positive electrode tab of battery module one side battery, negative busbar is electrically connected with the negative electrode tab of battery module another side battery, bolt passes through positive electrode support, end face support and negative electrode support and is connected into an organic whole.The utility model structure design is reasonable, space utilization is high, heat dissipation performance is greatly improved, safety reliability is high, and assembly is convenient.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery technology, specifically to a soft-pack battery module. Background Technology

[0002] Lithium batteries can be classified into cylindrical cells, prismatic cells, and pouch cells according to their packaging form. Among them, pouch cells have advantages such as good safety, light weight, high energy density, good electrochemical performance, and long cycle life. Currently, most pouch battery products use a traditional method of fixing the pouch cells (multiple pouch cells constitute the core of the pouch battery) with a surrounding frame and aluminum plate. This method has the following disadvantages: large space occupation, low volume utilization, and poor battery heat dissipation.

[0003] In summary, this utility model designs a soft-pack battery module. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a soft-pack battery module with reasonable structural design, high space utilization, greatly improved heat dissipation performance, high safety and reliability, and convenient assembly.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a soft-pack battery module, comprising multiple battery modules, which are arranged sequentially between a front end plate and a rear end plate. A positive electrode bracket and a negative electrode bracket are respectively provided on both sides of the battery modules. A busbar is disposed on an end face fixing plate. The busbar electrically connects the positive electrode tab of one soft-pack cell to the negative electrode tab of another soft-pack cell. The two sides of the busbar are a positive busbar and a negative busbar, respectively. The positive busbar is disposed on the positive electrode bracket, and the negative busbar is disposed on the negative electrode bracket. The positive busbar is electrically connected to the positive electrode tab of a cell on one side of the battery module, and the negative busbar is electrically connected to the negative electrode tab of a cell on the other side of the battery module. Bolts pass through the positive electrode bracket, the end face bracket, and the negative electrode bracket, connecting them as a single unit.

[0006] Preferably, the battery module includes a heat sink, a thermally conductive insulating sheet, foam, an end face bracket, and a pouch cell. The heat sink has a cavity, the pouch cell is disposed inside the heat sink, the thermally conductive insulating sheet is placed between the inner surface of the heat sink and the pouch cell, the foam is placed between the pouch cells, and the end face bracket is placed at both ends of the heat sink, and the end face bracket is connected to the heat sink by a snap-fit ​​connection.

[0007] Preferably, the heat sink has multiple square holes evenly distributed at both ends, and multiple round holes evenly distributed on the end face bracket, with the square holes and round holes being snapped together for fixation.

[0008] The beneficial effects of this utility model are: the structure of this utility model is reasonable, the space utilization rate is high, the heat dissipation performance is greatly improved, the safety and reliability are high, and the assembly is convenient. Attached Figure Description

[0009] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments;

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a schematic diagram of the battery module of this utility model;

[0012] Figure 3 for Figure 2 Exploded view. Detailed Implementation

[0013] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0014] Reference Figure 1-3 The specific embodiment adopts the following technical solution: a soft-pack battery module, including multiple battery modules 1, the battery modules 1 are arranged sequentially between the front end plate 7 and the rear end plate 8, the positive electrode bracket 2 and the negative electrode bracket 3 are respectively provided on both sides of the battery module 1, the busbar 4 is provided on the end face fixing plate, the busbar 4 electrically connects the positive electrode tab of one soft-pack battery cell to the negative electrode tab of another soft-pack battery cell, the two sides of the busbar 4 are the positive electrode busbar 5 and the negative electrode busbar 6, the positive electrode busbar 5 is provided on the positive electrode bracket 2, the negative electrode busbar 6 is provided on the negative electrode bracket 3, the positive electrode busbar 5 is electrically connected to the positive electrode tab of the battery cell on one side of the battery module, and the negative electrode busbar 6 is electrically connected to the negative electrode tab of the battery cell on the other side of the battery module, and the bolt 9 passes through the positive electrode bracket, the end face bracket and the negative electrode bracket and connects them into one piece.

[0015] It is worth noting that the battery module 1 includes a heat dissipation shell 111, a thermally conductive insulating sheet 11, foam 12, an end face bracket 112, and a soft-pack battery cell 10. The heat dissipation shell 111 has a cavity, the soft-pack battery cell 10 is disposed inside the heat dissipation shell 111, the thermally conductive insulating sheet 11 is placed between the inner surface of the heat dissipation shell 111 and the soft-pack battery cell 10, the foam 12 is placed between the soft-pack battery cells 10, and the end face bracket 112 is placed at both ends of the heat dissipation shell 111, and the end face bracket 112 is connected to the heat dissipation shell 111 by a snap fastener 1121.

[0016] In addition, the heat dissipation shell 111 has multiple square holes 1111 evenly distributed at both ends, and the end face bracket 112 has multiple round holes 1112 evenly distributed, with the square holes 1111 and the round holes 1112 being snapped together and fixed.

[0017] The working principle of this specific embodiment is as follows: Multiple pouch cells are arranged sequentially within the cavity of the heat sink, and contact the inner wall of the heat sink via thermally conductive insulating sheets. Foam is filled between the cells to buffer vibration and maintain spacing. End face brackets are fixed to both ends of the heat sink with clips, forming a modular unit.

[0018] The busbar connects the positive and negative tabs of adjacent cells in series (e.g., positive terminal of cell A → negative terminal of cell B). The positive and negative busbars respectively collect the tabs on both sides of the module, forming the overall positive and negative outputs. Heat is conducted to the heat sink through the thermally conductive insulating sheet, and then dissipated through air convection or an external cooling system. Bolts pass through the positive terminal bracket, end face bracket, and negative terminal bracket, locking the entire module into a rigid whole.

[0019] In this specific implementation, the heat sink directly encases the battery cell, replacing the traditional frame + aluminum plate structure and reducing redundant space occupation. The snap-fit ​​connection and bolt locking method saves more space in the thickness direction than welding or screw fixing. Thermally conductive insulating sheets (such as silicone pads) quickly transfer heat from the battery cell to the elastic pressure of the metal heat sink foam, ensuring tight contact between the battery cell and the heat sink and preventing localized overheating. The end face brackets and front and rear end plates form multi-level protection to prevent battery cell deformation due to collisions. The thermally conductive insulating sheets also have an insulating function, preventing short-circuit risks. Snap-fit ​​connection: simplifies the assembly of the end face bracket and heat sink, requiring no additional tools. Standardized interface: The plug-in design of the bus and bracket facilitates automated production.

[0020] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A soft-pack battery module, characterized in that, The battery module (1) includes multiple battery modules (1), which are arranged sequentially between the front end plate (7) and the rear end plate (8). The positive electrode bracket (2) and the negative electrode bracket (3) are respectively provided on both sides of the battery module (1). The busbar (4) is set on the end face fixing plate. The busbar (4) connects the positive electrode tab of one soft-pack battery cell to the negative electrode tab of another soft-pack battery cell. The two sides of the busbar (4) are the positive electrode busbar (5) and the negative electrode busbar (6). The positive electrode busbar (5) is set on the positive electrode bracket (2), and the negative electrode busbar (6) is set on the negative electrode bracket (3). The positive electrode busbar (5) is electrically connected to the positive electrode tab of the battery cell on one side of the battery module, and the negative electrode busbar (6) is electrically connected to the negative electrode tab of the battery cell on the other side of the battery module. The bolt (9) passes through the positive electrode bracket, the end face bracket and the negative electrode bracket and connects them into one unit.

2. The soft-pack battery module according to claim 1, characterized in that, The battery module (1) includes a heat sink (111), a thermally conductive insulating sheet (11), foam (12), an end face bracket (112), and a soft-pack battery cell (10). The heat sink (111) has a cavity. The soft-pack battery cell (10) is disposed inside the heat sink (111). The thermally conductive insulating sheet (11) is placed between the inner surface of the heat sink (111) and the soft-pack battery cell (10). The foam (12) is placed between the soft-pack battery cells (10). The end face bracket (112) is placed at both ends of the heat sink (111), and the end face bracket (112) is connected to the heat sink (111) by a snap-fit ​​(1121).

3. A soft-pack battery module according to claim 2, characterized in that, The heat sink (111) has multiple square holes (1111) evenly distributed at both ends, and the end face bracket (112) has multiple round holes (1112) evenly distributed. The square holes (1111) and the round holes (1112) are snapped together and fixed.

Images