Blade battery structure

Abstract

A blade battery structure relates to the technical field of blade batteries and is characterized in that a blade battery is formed by stacking a plurality of battery cell units, each battery cell unit comprises a battery cell unit shell and a battery cell, the battery cell is mounted in an inner cavity of the battery cell unit shell, and the battery cell is mounted in the inner cavity of the battery cell unit shell. And the battery cell unit shell is a cuboid hollow shell formed by pressing two folded ends at the interface together. The battery cell unit shell disclosed by the utility model is made of the thin metal plate, the edge folding process is adopted at the interface, the two ends of the interface are folded, and then the two ends are pressed together by pressure, so that the structure does not use the traditional laser welding or high-frequency welding process, heat influence on materials in the welding process is not generated, and the battery cell unit shell has the advantages of simple structure and low cost. Deformation of the welded shell is avoided, and the production efficiency and the product quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of blade batteries, in particular to a blade battery structure. Background Technology

[0002] Currently, blade batteries have been widely used in new energy vehicles. Blade batteries are lithium iron phosphate batteries that adopt a module-free structure design, eliminating the intermediate module link and directly integrating the battery cell unit into a battery pack. The shell of the existing battery cell unit needs to be manufactured using laser welding or high-frequency welding technology. Since the shell of the battery cell unit is thin and long, the traditional welding process equipment is complex and the manufacturing cost is high. In addition, the thermal effect on the material during the welding process will cause the shell to deform, affecting the product quality. In order to solve the above problems, it is necessary to research and develop a new blade battery structure. Contents of utility model

[0003] The purpose of the utility model is to provide a blade battery structure to solve the problem of product quality affected by welding deformation of the battery cell housing during the production process of blade batteries.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A blade battery structure, the blade battery is formed by stacking multiple battery cells, the battery cell unit includes a battery cell unit shell and a battery cell, the battery cell is installed in the inner cavity of the battery cell unit shell, two adjacent battery cell unit shells are bonded and fixed together using a silicone frame and aerogel, one end of the battery cell is the battery cell negative electrode, and the other end is the battery cell positive electrode, and multiple battery cells are arranged together in a form in which both ends are positive and negative electrodes alternately.

[0006] In the above-mentioned blade battery structure, the battery cell unit shell is a rectangular hollow shell formed by pressing the two ends folded at the interface together.

[0007] The utility model has the following advantages:

[0008] The battery cell unit shell of the utility model is made of a thinner metal sheet, and the interface adopts a folding process to fold the two ends of the interface, and then use pressure to press the two ends together. This structure does not use traditional laser welding or high-frequency welding technology, will not produce thermal effects on the material during welding, will not cause deformation of the shell after welding, and improves production efficiency and product quality. Brief Description of the Figures

[0009] Figure 1 is a partial exploded schematic diagram of the utility model;

[0010] Figure 2 This is an enlarged view of point A;

[0011] Figure 3 is a schematic diagram of the external interface structure of the battery cell housing;

[0012] Figure 4 is a schematic diagram of the corner connection structure of the battery cell housing;

[0013] The numbers in the figure represent: 1. battery cell housing, 2. battery cell, 3. silicone frame and aerogel, 4. battery cell negative electrode, 5. battery cell positive electrode. Specific implementation method

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] A blade battery structure of the utility model, such as Figure 1 As shown in FIG. 1 , the blade battery is composed of a plurality of battery cells stacked in sequence, wherein the battery cell is composed of a battery cell 2 and a battery cell housing 1, wherein the battery cell 2 is installed in the battery cell housing 1, and a battery cell negative electrode 4 and a battery cell positive electrode 5 are respectively provided at both ends of the battery cell 2.

[0016] The utility model is a blade battery structure, the battery cell unit shell 1 is a rectangular hollow shell, made of metal plates, and the folded two ends of the plate interface are pressed together.

[0017] A blade battery structure of the utility model, such as Figure 2 As shown in , it is the first interface folding shape of the battery cell unit shell 1, which can ensure the flatness of the outer periphery of a single battery cell, but requires the battery cell to be partially avoided; as shown in Figure 3 shows the second interface folding shape of the battery cell housing 1, as shown in Figure 4 As shown, it is the third interface folding shape of the battery cell unit shell 1. The second and third folding structures ensure the integrity of the battery cell, but occupy the external space. The above three structural forms can be selected according to actual design requirements such as space conditions.

[0018] The utility model is a blade battery structure, the battery shell 1 and the battery core 2 after folding are assembled according to the design requirements, such as Figure 1 As shown in , the battery cells 2 are loaded into the battery housing 1 in a manner in which the positive and negative electrodes of the battery cells 2 are alternately connected, and a heat insulating pad is added between adjacent battery housings 1, which are connected with aerogel to form the blade battery of the utility model.​​

Claims

1. A blade battery structure, characterized in that: The blade battery is formed by stacking a plurality of battery cell units, wherein the battery cell unit comprises a battery cell unit shell (1) and a battery cell (2), wherein the battery cell (2) is installed in the inner cavity of the battery cell unit shell (1), and two adjacent battery cell unit shells (1) are bonded and fixed together using a silicone frame and an aerogel (3), one end of the battery cell (2) is a battery cell negative electrode (4), and the other end is a battery cell positive electrode (5), and the plurality of battery cells (2) are arranged together in a form in which both ends have positive electrodes and negative electrodes that alternate with each other.

2. The blade battery structure according to claim 1, characterized in that: The battery cell unit shell (1) is a rectangular hollow shell formed by pressing two ends folded at an interface together.

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