Outer packaging structure of soft packaging battery

Abstract

The utility model provides an outer packaging structure of a soft packaging battery, which relates to the technical field of batteries and comprises an outer packaging film and a battery core frame, the battery core frame is arranged in the outer packaging film, the outer packaging film is a multi-layer composite film, an isolating film is lined on the inner surface of the outer packaging film, and the isolating film and the battery core frame are of a coated arc-shaped fitting structure; according to the soft package battery, on the basis that the applicability of an outer package structure of the soft package battery is considered, the battery cell frame additionally arranged in the outer package film serves as a positioning and fixing structure of a naked battery cell, the battery cell frame is additionally arranged in the outer package film, and therefore the positioning and fixing structure of the naked battery cell is improved, and the positioning and fixing effect of the naked battery cell is improved. The structure is connected through the soft connecting strips, and the characteristic of the angle-shaped folding structure of the connecting strips is matched, so that the frame structure has a certain compression activity space, and the structure of the soft package battery is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and more specifically, to a soft-pack battery outer packaging structure. Background Art

[0002] Soft-pack batteries generally include positive electrode sheets, negative electrode sheets and solid electrolytes, wherein the solid electrolytes are stacked on the adjacent positive electrode sheets and negative electrode sheets, and aluminum-plastic films (aluminum-plastic film stacks) of set sizes are stacked on the upper and lower sides of the soft-pack batteries for packaging. Generally, stacking and diaphragm gluing and fixing positioning, and tab ultrasonic welding are completed before pre-packaging of ordinary liquid soft-pack batteries, and finally the battery is packaged externally. The battery's external packaging structure is usually shaped with aluminum-plastic films and the battery body. Its structure lacks an external packaging support structure of a certain strength after the bare battery is packaged externally. There is a risk of displacement and offset between the positive and negative tabs of the electrodes and the battery cell, which affects the quality and safety of the soft-pack batteries.

[0003] In view of this, the utility model provides an effective solution to the problem that the existing soft-pack battery outer packaging structure provides poor support for the overall battery cell structure, thereby limiting the quality and safety of the soft-pack battery. Utility Model Content

[0004] The technical problem to be solved by the utility model is that the traditional soft-pack battery outer packaging structure provides poor support for the overall battery core structure. In view of the problems existing in the prior art, a soft-pack battery outer packaging structure is provided.

[0005] The purpose and effect of the utility model are achieved by the following specific technical means: comprising an outer packaging film and a battery frame, wherein the battery frame is arranged in the outer packaging film, the outer packaging film is a multi-layer composite film, the inner surface of the outer packaging film is lined with an isolation film, and the isolation film and the battery frame are a wrapped arc-shaped fitting structure;

[0006] Each corner of the cell frame is fixed with an angle plate, a positioning column is fixed to the side end of the angle plate, and a fitting head is inserted between the outer packaging film and the positioning column;

[0007] Both sides of the cell frame are provided with integrally formed connecting strips, and the connecting strips are elastic structures formed by folding in an angle.

[0008] Furthermore: a relatively thick polypropylene film layer is lined between the outer packaging film and the isolation film connecting layer.

[0009] A further preferred solution is that an electrode ear lining plate is protruding from one end of the battery cell frame, two positive and negative electrode ear grooves are formed on the electrode ear lining plate, and the electrode ear lining plate is an insulating plate.

[0010] A further preferred solution is that a rubber pad is buckled between the corner plate and the outer packaging film.

[0011] A further preferred solution is that a shaft seat is axially fixed in the positioning column, and the shaft seat is plugged and fixed to the inner end of the engaging head.

[0012] A further preferred solution is that a column core shaft is provided between the shaft seat and the positioning column, and the column core shaft is rotatably matched with the shaft seat.

[0013] Beneficial effects of the utility model:

[0014] Taking into account the applicability of the soft-pack battery outer packaging structure, the soft-pack battery uses a cell frame installed in the external outer packaging film as a positioning and fixing structure for the bare cell. The structure is connected by soft connecting strips. Combined with the characteristics of the corner folding structure of the connecting strips, the frame structure has a certain pressure-bearing activity space to ensure the structural properties of the soft-pack battery. At the same time, the angle plates and positioning columns set at fixed points are used to match the outer packaging film. The outer packaging film is combined to improve the integrity of the outer packaging structure, while improving the strength and reliability of the outer packaging structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model will be further described below in conjunction with the accompanying drawings.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the battery core frame structure of the utility model;

[0018] Figure 3 This is an installation diagram of the chimeric head and positioning column structure of the utility model.

[0019] Figure 1-Figure 3 Middle: outer packaging film 1, battery frame 2, fitting head 3, electrode ear lining plate 4, connecting strip 5, angle plate 6, positioning column 7, isolation film 8, shaft seat 9, column core shaft 10. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, Figure 1-Figure 3 The utility model is further described in detail with specific implementation methods. The following embodiments are only examples for implementing the utility model. It must be pointed out that the disclosed embodiments do not limit the scope of the utility model. On the contrary, changes and modifications made without departing from the scope of the utility model are all within the scope of patent protection of the utility model.

[0021] A soft-pack battery outer packaging structure, comprising an outer packaging film 1 and a battery frame 2, wherein the battery frame 2 is arranged in the outer packaging film 1, the outer packaging film 1 is a multi-layer composite film, the inner surface of the outer packaging film 1 is lined with an isolation film 8, and the isolation film 8 and the battery frame 2 are a wrapped arc-shaped fitting structure;

[0022] Each corner of the cell frame 2 is fixed with an angle plate 6, a positioning column 7 is fixed to the side end of the angle plate 6, and a fitting head 3 is inserted between the outer packaging film 1 and the positioning column 7;

[0023] Both sides of the cell frame 2 are provided with an integrally formed connecting strip 5, and the connecting strip 5 is an elastic structure formed by folding in an angle;

[0024] Specifically, the soft-pack battery outer packaging structure is based on the traditional soft-pack battery aluminum-plastic film outer packaging structure, and uses the cell frame 2 set in the outer packaging film 1 as the positioning frame of the bare cell. The cell frame 2 is provided with a punching hole inside to accommodate the bare cell, so as to utilize the fixation of the cell frame 2 structure and the outer packaging film 1 to maintain the fixation of the bare cell and the outer packaging film 1 and its base material. In the structure, the outer packaging film 1 is separated from the outer side of the cell frame 2 by a composite isolation film 8 to isolate and distinguish the bare cell in the cell frame 2. At the same time, the coated arc structure has a certain strength of tensile resistance to improve the coating strength of the isolation film 8 and the outer packaging film 1 and the side of the cell frame 2;

[0025] On its basis, Figure 2 As shown, the outer packaging film 1 and the cell frame 2 are fixedly positioned by inserting and fitting the positioning column 7 and the fitting head 3 on the outer packaging film 1, so as to further improve the outer packaging strength of the outer packaging structure;

[0026] At the same time, considering the limitations of the application scenarios of soft-pack batteries on their internal hard frames, the battery cell frame 2 adopts a structure of connecting and combining connecting strips 5, so that the side ends of the battery cell frame 2 have a soft activity space that can be folded, retracted and moved.

[0027] Furthermore, a relatively thick polypropylene film layer is lined between the connecting layer of the outer packaging film 1 and the isolation film 8, and the outer packaging film 1 and the isolation film 8 are further heat-sealed and packaged by the polypropylene film layer, thereby further improving the coating strength and packaging effect of the composite-molded outer packaging film 1;

[0028] At the same time, an electrode ear lining plate 4 is protruding from one end of the battery cell frame 2, and two positive and negative electrode ear grooves are formed on the electrode ear lining plate 4. The electrode ear lining plate 4 is an insulating plate. The electrode ear lining plate 4 is inserted through the battery cell frame 2 and the outer packaging film 1 to serve as the fixed end of the positive and negative electrode ears, so as to extend the positive and negative electrode ears out of the outer packaging film 1, and position and fix the positive and negative electrode ears;

[0029] On the basis of the above, a rubber pad is buckled between the angle plate 6 and the outer packaging film 1, and the outer packaging film 1 and the side of the angle plate 6 are further connected by the rubber pad that is buckled and combined with the angle plate 6. At the same time, the rubber pad has soft colloid properties that meet the material of soft-pack batteries to position and fix the outer packaging film 1 and the battery frame 2 structure;

[0030] Furthermore, an axle seat 9 is axially fixed in the positioning column 7, and the axle seat 9 is plugged and fixed with the inner end of the fitting head 3. The axle seat 9 is used as the plug-in matching end between the positioning column 7 and the fitting head 3, and the outer packaging film 1 and the positioning column 7 are connected in series in combination with the fitting head 3.

[0031] Furthermore, a column core shaft 10 is provided between the shaft seat 9 and the positioning column 7, and the column core shaft 10 is rotatably matched with the shaft seat 9. Through the rotational matching structure of the column core shaft 10 and the shaft seat 9, the connecting end of the positioning column 7 and the engaging head 3 has a certain axial activity space, so as to cooperate with the movement of the engaging head 3 when the film surface of the outer packaging film 1 is deformed, so as to avoid torsional deformation of the engaging head 3 and the end through which the outer packaging film 1 passes.

Claims

1. A soft pack battery outer packaging structure, characterized in that: It comprises an outer packaging film and a cell frame, wherein the cell frame is arranged inside the outer packaging film, the outer packaging film is a multi-layer composite film, the inner surface of the outer packaging film is lined with an isolation film, and the isolation film and the cell frame are a wrapped arc-shaped fitting structure; Each corner of the cell frame is fixed with an angle plate, a positioning column is fixed to the side end of the angle plate, and a fitting head is inserted between the outer packaging film and the positioning column; Both sides of the cell frame are provided with integrally formed connecting strips, and the connecting strips are elastic structures formed by folding in an angle.

2. The soft pack battery outer packaging structure according to claim 1, characterized in that: A relatively thick polypropylene film layer is lined between the outer packaging film and the isolation film connecting layer.

3. The soft pack battery outer packaging structure according to claim 1, characterized in that: An electrode ear lining plate is protruding from one end of the battery cell frame, two positive and negative electrode ear grooves are formed on the electrode ear lining plate, and the electrode ear lining plate is an insulating plate.

4. The soft pack battery outer packaging structure according to claim 1, characterized in that: A rubber pad is buckled between the corner plate and the outer packaging film.

5. The soft pack battery outer packaging structure according to claim 1, characterized in that: An axle seat is axially fixed in the positioning column, and the axle seat is plugged and fixed to the inner end of the engaging head.

6. The soft pack battery outer packaging structure according to claim 5, characterized in that: A column core shaft is provided between the shaft seat and the positioning column, and the column core shaft is rotatably matched with the shaft seat.

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