Soft package battery cell capable of preventing packaging heat radiation

Abstract

The utility model provides a soft package battery cell capable of preventing packaging heat radiation, and relates to the field of batteries, the soft package battery cell comprises a roll core body, an aluminum-plastic shell, a positive tab, a negative tab and an air bag support, the aluminum-plastic shell is folded in half, the roll core body is placed in the folded aluminum-plastic shell, and then the left side and the upper end of the aluminum-plastic shell are subjected to edge sealing treatment; then, the right side of the aluminum plastic shell is expanded through an air bag support, liquid injection treatment is carried out, finally, secondary edge sealing treatment is carried out on the right side of the aluminum plastic shell subjected to liquid injection, then the soft package battery cell is electrified and detected, and gas generated after electrification extrudes the aluminum plastic shell, so that the gas is concentrated on the side, away from the roll core body, of the aluminum plastic shell; according to the utility model, the problems of liquid injection pollution, secondary sealing pollution, poor battery cell glue melting and poor flatulence caused by adhesion of non-packaging areas of the aluminum plastic shell due to heat radiation of the sealing head of the soft package battery cell are solved.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a soft-pack battery cell that prevents packaging heat radiation. Background Art

[0002] The existing automatic multifunctional top and side sealing packaging machine uses metal head heat sealing packaging when producing soft-pack batteries. The heat of the metal head radiates outward, and the contact positions of the PP layers in the top sealing area, side sealing area, and air bag area on both sides of the aluminum-plastic shell fuse with each other. When producing soft-pack batteries, the PP layer of the aluminum-plastic shell in the air bag area needs to be separated to form a bag shape for use in subsequent processes. The problem of thermal radiation affects the formation of the aluminum-plastic shell air bag. The current soft-pack production process can only be improved by adding punching holes in the aluminum-plastic shell air bag area, and the problem of aluminum-plastic shell PP layer adhesion caused by thermal radiation cannot be completely solved. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a soft-pack battery cell that prevents packaging heat radiation, which can solve the technical problems of adhesion of the aluminum-plastic shell PP layer, secondary contamination of liquid injection, and flatulence.

[0004] An embodiment of the present application provides a soft-pack battery cell for preventing packaging heat radiation, comprising a roll core, an aluminum-plastic shell, a positive electrode ear, a negative electrode ear, and an air bag bracket, the aluminum-plastic shell being wrapped around the outer end of the roll core, a first edge sealing portion being arranged on the left side of the aluminum-plastic shell, the positive electrode ear and the negative electrode ear being connected to the upper end of the roll core, the positive electrode ear and the negative electrode ear being extended to the outer end of the aluminum-plastic shell, a second edge sealing portion being arranged on the upper end of the aluminum-plastic shell, the air bag bracket being arranged on the right side of the aluminum-plastic shell, and a third edge sealing portion being arranged on the right side of the aluminum-plastic shell.

[0005] Preferably, a fourth edge sealing portion is provided on the aluminum-plastic shell, and the fourth edge sealing portion is provided on the right side of the winding core body.

[0006] Preferably, the airbag support may be arranged in a triangular shape.

[0007] Preferably, the fourth edge sealing portion is arranged between the winding core and the air bag support, and the distance between the air bag support and the winding core is ≥6 mm.

[0008] Preferably, the airbag bracket is made of hot-melt PP adhesive.

[0009] Preferably, a glue layer is provided between the positive electrode ear and the aluminum-plastic shell, and between the negative electrode ear and the aluminum-plastic shell.

[0010] Preferably, a support member is provided at one end of the airbag support away from the winding core.

[0011] Preferably, two airbag supports may be provided.

[0012] Preferably, a plurality of airbag supports may be provided.

[0013] Beneficial effects of the utility model:

[0014] The utility model provides a soft-packed battery core for preventing package heat radiation, comprising a roll core, an aluminum-plastic shell, a positive pole ear, a negative pole ear, and an airbag bracket, wherein the aluminum-plastic shell is wrapped around the outer end of the roll core, a first edge seal is arranged on the left side of the aluminum-plastic shell, the positive pole ear and the negative pole ear are both connected to the upper end of the roll core, the positive pole ear and the negative pole ear are both extended to the outer end of the aluminum-plastic shell, a second edge seal is arranged on the upper end of the aluminum-plastic shell, the airbag bracket is arranged on the right side of the aluminum-plastic shell, and a third edge seal is arranged on the right side of the aluminum-plastic shell. The utility model first folds the aluminum-plastic shell in half, places the roll core in the folded aluminum-plastic shell, and then folds the left side of the aluminum-plastic shell. The upper end is edge-sealed, and then the right side of the aluminum-plastic shell is opened by an air bag bracket, and liquid is injected. Finally, the right side of the aluminum-plastic shell after liquid injection is edge-sealed for the second time, and then the soft-pack battery cell is powered on for detection. The gas generated after power-on is squeezed by the aluminum-plastic shell, so that the gas is concentrated on the side of the aluminum-plastic shell away from the roll core body, and the excess liquid and gas are extracted by vacuum packaging equipment, and the third edge-sealing is performed, and finally the excess aluminum-plastic shell and the air bag bracket are cut off. The utility model solves the problems of liquid injection pollution, secondary sealing pollution, poor battery cell melting and poor flatulence caused by adhesion of the non-packaging area of ​​the aluminum-plastic shell due to heat radiation from the sealing head of the soft-pack battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

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

[0017] Figure 2 This is another structural schematic diagram of the utility model.

[0018] The reference numerals are:

[0019] 1. winding core; 2. aluminum-plastic shell; 3. positive electrode ear; 4. negative electrode ear; 5. airbag bracket; 6. first edge sealing part; 7. second edge sealing part; 8. third edge sealing part; 9. adhesive layer; 10. fourth edge sealing part; 11. supporting member. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0024] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] like Figure 1As shown, a soft-pack battery cell for preventing package heat radiation includes a roll core 1, an aluminum-plastic shell 2, a positive electrode ear 3, a negative electrode ear 4, and an air bag bracket 5. The aluminum-plastic shell 2 is wrapped around the outer end of the roll core 1, and a first edge sealing portion 6 is arranged on the left side of the aluminum-plastic shell 2. The positive electrode ear 3 and the negative electrode ear 4 are both connected to the upper end of the roll core 1, and the positive electrode ear 3 and the negative electrode ear 4 are both extended to the outer end of the aluminum-plastic shell 2. A second edge sealing portion 7 is arranged on the upper end of the aluminum-plastic shell 2, and the air bag bracket 5 is arranged on the right side of the aluminum-plastic shell 2. A third edge sealing portion 8 is arranged on the right side of the aluminum-plastic shell 2. When the utility model is used, the aluminum-plastic shell 2 is first folded in half, the roll core 1 is placed in the folded aluminum-plastic shell 2, and then The left side and the upper end of the aluminum-plastic shell 2 are edge-sealed, and then the right side of the aluminum-plastic shell 2 is opened by the air bag bracket 5, and liquid is injected. Finally, the right side of the aluminum-plastic shell 2 after liquid injection is edge-sealed for the second time, and then the soft-pack battery cell is powered on for detection. The gas generated after power-on is squeezed by the aluminum-plastic shell 2, so that the gas is concentrated on the side of the aluminum-plastic shell 2 away from the winding core 1, and the excess liquid and gas are extracted by vacuum packaging equipment, and the third edge sealing is performed, and finally the excess aluminum-plastic shell 2 and the air bag bracket 5 are cut off. The utility model solves the problems of liquid injection pollution, secondary sealing pollution, poor battery cell melting, and poor flatulence caused by adhesion of the non-packaging area of ​​the aluminum-plastic shell 2 due to heat radiation from the sealing head of the soft-pack battery cell.

[0027] Specifically, the aluminum-plastic shell 2 is first placed in a thermoplastic mold, and then the roll core 1 with the positive electrode ear 3 and the negative electrode ear 4 is placed on one side of the aluminum-plastic shell 2. Then, the aluminum-plastic shell 2 is folded in half, and the left side and the upper end of the aluminum-plastic shell 2 are heat-sealed to form a first edge seal 6 and a second edge seal 7. Then, liquid is injected, and then the right side of the aluminum-plastic shell 2 is heat-sealed to form a third edge seal 8. Then, the soft-pack battery cell is powered on, tested, and the gas generated during the test will be in the aluminum-plastic shell 2. Then, the soft-pack battery cell is rotated so that the roll core 1 is at the lower end. Then, the aluminum-plastic shell 2 is heat-sealed for the third time to form a fourth edge seal 10. Finally, the aluminum-plastic shell 2 on the right side of the fourth edge seal 10 is cut off, and the remaining aluminum-plastic shell 2 can be centrally processed to prevent environmental pollution.

[0028] like Figure 1 As shown, in the present embodiment, the material of the airbag bracket 5 is hot-melt PP glue, and a support member 11 is provided at one end of the airbag bracket 5 away from the winding core 1. When the aluminum-plastic shell 2 does not need to be propped up, the airbag bracket 5 is arranged in a strip shape. When the aluminum-plastic shell 2 needs to be propped up, the support member 11 of the airbag bracket 5 is rotated so that the airbag bracket 5 is arranged in a triangular shape, and the right side of the aluminum-plastic shell 2 is propped open. The airbag bracket 5 made of hot-melt PP glue can be directly heat-sealed.

[0029] like Figure 1As shown, in this embodiment, in order to make the positive electrode ear 3 and the negative electrode ear 4 fixed more firmly, a glue layer 9 is provided between the positive electrode ear 3 and the aluminum-plastic shell 2 and between the negative electrode ear 4 and the aluminum-plastic shell 2 .

[0030] like Figure 1 As shown, in this embodiment, the third edge sealing portion 8 is disposed between the winding core 1 and the air bag support 5 , and the distance between the air bag support 5 and the winding core 1 is ≥6 mm.

[0031] In this embodiment, two airbag brackets 5 may be provided, and the airbag brackets 5 may be placed at the upper and lower ends of the aluminum-plastic shell 2 .

[0032] like Figure 2 As shown, in another embodiment, the airbag bracket 5 can be provided in plurality, specifically, three can be selected, and the number of the airbag bracket 5 can be selected according to the width of the aluminum-plastic shell 2, and the airbag bracket 5 can be placed at the upper, middle and lower ends of the aluminum-plastic shell 2.

[0033] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A soft-pack battery cell for preventing package heat radiation, characterized in that: It includes a winding core, an aluminum-plastic shell, a positive electrode ear, a negative electrode ear, and an air bag bracket. The aluminum-plastic shell is wrapped around the outer end of the winding core, a first edge sealing portion is arranged on the left side of the aluminum-plastic shell, the positive electrode ear and the negative electrode ear are both connected to the upper end of the winding core, the positive electrode ear and the negative electrode ear are both extended to the outer end of the aluminum-plastic shell, a second edge sealing portion is arranged on the upper end of the aluminum-plastic shell, the air bag bracket is arranged on the right side of the aluminum-plastic shell, and a third edge sealing portion is arranged on the right side of the aluminum-plastic shell.

2. A soft-package battery cell for preventing package heat radiation according to claim 1, characterized in that: The aluminum-plastic shell is provided with a fourth edge sealing portion, and the fourth edge sealing portion is arranged on the right side of the winding core body.

3. A soft-package battery cell for preventing package heat radiation according to claim 1, characterized in that: The air bag support may be arranged in a triangular shape.

4. A soft-package battery cell for preventing package heat radiation according to claim 2, characterized in that: The fourth edge sealing portion is arranged between the winding core and the air bag support, and the distance between the air bag support and the winding core is ≥6 mm.

5. The soft-package battery cell for preventing package heat radiation according to claim 1, characterized in that: The material of the air bag bracket is hot-melt PP adhesive.

6. A soft-package battery cell for preventing package heat radiation according to claim 1, characterized in that: An adhesive layer is provided between the positive electrode ear and the aluminum-plastic shell, and between the negative electrode ear and the aluminum-plastic shell.

7. The soft-package battery cell for preventing package heat radiation according to claim 1, characterized in that: A support member is disposed at one end of the air bag support away from the winding core.

8. The soft-package battery cell for preventing package heat radiation according to claim 1, characterized in that: Two airbag supports may be provided.

9. The soft-package battery cell for preventing package heat radiation according to claim 1, characterized in that: The airbag bracket may be provided in plurality.

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