Polymer battery cell with safety protection

Abstract

The utility model discloses a polymer battery cell with safety protection, which comprises a battery cell body, an aluminum plastic film is fixedly arranged on the surface of the battery cell body, a bonding layer is fixedly arranged on the surface of the aluminum plastic film, a first air bag is fixedly arranged on the surface of the bonding layer, a connecting block is fixedly arranged on the surface of the bonding layer, and a second air bag is fixedly arranged on the surface of the connecting block. A first protection plate is fixedly arranged on the surface of the connecting block, a spring is fixedly arranged on the side, away from the battery cell body, of the first protection plate, one end of the spring is fixedly connected with the first protection plate, and a second protection plate is fixedly arranged at the other end of the spring; a second air bag is fixedly arranged on the side, away from the battery cell body, of the first protection plate, the polymer battery cell is filled with carbon dioxide or other flame-retardant gas towards the first air cavity and the second air cavity, the extrusion effect on the battery cell body can be relieved, and meanwhile safety protection can be conducted in time when the battery cell is spontaneously ignited.

Description

Technical Field

[0001] The utility model relates to the technical field of battery cores, and in particular to a polymer battery core with safety protection. Background Art

[0002] Polymer battery cells are also a component of lithium-ion batteries. The composition of lithium-ion secondary rechargeable batteries is as follows: battery cells + protection circuit boards. Rechargeable batteries without protection circuit boards are battery cells. They are the power storage part of rechargeable batteries. The quality of battery cells directly determines the quality of rechargeable batteries.

[0003] Polymer batteries will inevitably be dropped or squeezed by heavy and sharp objects in daily use, and the existing polymer batteries do not have effective protection measures, which makes the polymer batteries very easy to be damaged and unusable. The surface of the polymer battery is a flexible material as the outer box. If a short circuit causes the battery to swell, it will not explode, but it will still burn. When the polymer battery spontaneously ignites, there is no effective flame retardant protection, which can easily cause a fire. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a polymer battery cell with safety protection, which is used to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A polymer battery cell with safety protection comprises a battery cell body, an aluminum-plastic film is fixedly provided on the surface of the battery cell body, an adhesive layer is fixedly provided on the surface of the aluminum-plastic film, a first airbag is fixedly provided on the surface of the adhesive layer, a connecting block is fixedly provided on the surface of the adhesive layer, a first protective plate is fixedly provided on the surface of the connecting block, a spring is fixedly provided on a side of the first protective plate away from the battery cell body, one end of the spring is fixedly connected to the first protective plate, a second protective plate is fixedly provided on the other end of the spring, and a second airbag is fixedly provided on a side of the first protective plate away from the battery cell body.

[0007] Preferably, a first air cavity is defined inside the first airbag, and a second air cavity is defined inside the second airbag.

[0008] Preferably, the first protective plate and the second protective plate are made of the same material, both of which are made of high-hardness polyphenylene sulfide plates.

[0009] Preferably, the first airbag and the second airbag are made of the same material, both made of nylon.

[0010] Preferably, there are multiple springs, and the multiple springs are distributed in a rectangular array on a side of the first protective plate away from the battery cell body.

[0011] Preferably, there are two first protective plates, and the two first protective plates are symmetrically distributed on the upper and lower sides of the aluminum-plastic film.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the polymer battery cell with safety protection is filled with carbon dioxide or other flame-retardant gases toward the interior of the first air cavity and the second air cavity. When the battery cell body spontaneously ignites due to a short circuit, the first air bag made of nylon burns when it encounters fire, and the carbon dioxide gas inside it is released, thereby extinguishing the flame just after it starts to burn. At the same time, the second protective plate and the first protective plate made of high-hardness polyphenylene sulfide board can effectively prevent flames. When the second protective plate is squeezed, the spring is compressed, and the squeezing force on the battery cell body is reduced by the rebound effect of the spring. The polymer battery cell can reduce the squeezing effect on the battery cell body, and can provide timely safety protection when the battery cell spontaneously ignites. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the structural survey drawing of the utility model;

[0014] Figure 2 It is a right sectional view of the structure of the utility model;

[0015] Figure 3 It is a schematic diagram of the local structure of the utility model;

[0016] Figure 4 for Figure 2 A magnified view of the structure at A;

[0017] Figure 5 for Figure 3 Enlarged view of the structure at B.

[0018] In the figure: 1. battery cell body; 2. aluminum-plastic film; 3. adhesive layer; 4. first air bag; 5. connecting block; 6. first protective plate; 7. spring; 8. second protective plate; 9. second air bag; 10. second air cavity; 11. first air cavity. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Reference Figure 1-5A polymer battery cell with safety protection comprises a battery cell body 1, an aluminum-plastic film 2 is fixedly arranged on the surface of the battery cell body 1, an adhesive layer 3 is fixedly arranged on the surface of the aluminum-plastic film 2, a first airbag 4 is fixedly arranged on the surface of the adhesive layer 3, a connecting block 5 is fixedly arranged on the surface of the adhesive layer 3, a first protective plate 6 is fixedly arranged on the surface of the connecting block 5, the number of the first protective plates 6 is two, and the two first protective plates 6 are symmetrically distributed on the upper and lower sides of the aluminum-plastic film 2, a spring 7 is fixedly arranged on the side of the first protective plate 6 away from the battery cell body 1, and the spring 7 There are multiple springs 7, and the multiple springs 7 are distributed in a rectangular array on the side of the first protective plate 6 away from the battery body 1. Through the rebound effect of the multiple springs 7, the extrusion of the battery body 1 is reduced. One end of the spring 7 is fixedly connected to the first protective plate 6, and the other end of the spring 7 is fixedly provided with a second protective plate 8. A second airbag 9 is fixedly provided on the side of the first protective plate 6 away from the battery body 1. A first air cavity 11 is opened inside the first airbag 4, and a second air cavity 10 is opened inside the second airbag 9. The first air cavity 11 and the second air cavity 10 are filled with two Carbon dioxide or other flame retardant gases, the first protective plate 6 and the second protective plate 8 are made of the same material, both are made of high-hardness polyphenylene sulfide board, the high-hardness polyphenylene sulfide board has good hardness and can effectively avoid combustion, the first airbag 4 and the second airbag 9 are made of the same material, both are made of nylon, the airbag made of nylon will burn at high temperatures, and can release the flame retardant gas inside in time, thereby extinguishing the flame, the polymer battery with safety protection, fills the first air cavity 11 and the second air cavity 10 with carbon dioxide or other flame retardant gases When the battery body 1 spontaneously ignites due to a short circuit, the first airbag 4 made of nylon burns when it encounters fire, and the carbon dioxide gas inside it is released, thereby extinguishing the flame just after it starts to burn. At the same time, the second protective plate 8 and the first protective plate 6 made of high-hardness polyphenylene sulfide board can effectively prevent flames. When the second protective plate 8 is squeezed, the spring 7 is compressed, and the squeezing force on the battery body 1 is reduced by the rebound effect of the spring 7. The polymer battery can reduce the squeezing effect on the battery body 1, and can provide timely safety protection when the battery cell spontaneously ignites.

[0021] The electrical components mentioned in this article are all connected to an external main controller and 220V mains electricity, and the main controller can be a conventional known device for controlling a computer or the like.

[0022] During use: fill the first air cavity 11 and the second air cavity 10 with carbon dioxide or other flame-retardant gases. When squeezed from the side, the first air bag 4 and the gas inside the first air cavity 11 can be used for buffering, thereby reducing the squeezing force on the side of the polymer battery cell. When squeezed in the up and down directions, the second protective plate 8 moves toward the battery cell body 1, and the second protective plate 8 moves downward to squeeze the spring 7. Through the rebound effect of the spring 7 and the buffering effect of the second air bag 9, the squeezing force on the battery cell body 1 from the up and down directions is reduced. When the battery cell body 1 spontaneously ignites due to a short circuit, the first air bag 4 made of nylon burns when it encounters fire, and the carbon dioxide gas inside it is released, thereby extinguishing the flame just as it starts to burn. At the same time, the second protective plate 8 and the first protective plate 6 made of high-hardness polyphenylene sulfide board can effectively prevent flames.

[0023] To summarize, the polymer battery cell with safety protection is filled with carbon dioxide or other flame-retardant gases toward the interior of the first air cavity 11 and the second air cavity 10. When the battery cell body 1 spontaneously ignites due to a short circuit, the first air bag 4 made of nylon burns when it encounters fire, and the carbon dioxide gas inside it is released, thereby extinguishing the flame just after it starts to burn. At the same time, the second protective plate 8 and the first protective plate 6 made of high-hardness polyphenylene sulfide board can effectively prevent flames. When the second protective plate 8 is squeezed, the spring 7 is compressed, and the squeezing force on the battery cell body 1 is reduced by the rebound effect of the spring 7. The polymer battery cell can reduce the squeezing effect on the battery cell body 1, and at the same time, can provide timely safety protection when the battery cell spontaneously ignites.

[0024] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A polymer battery cell with safety protection, comprising a battery cell body (1), characterized in that: An aluminum-plastic film (2) is fixedly provided on the surface of the battery cell body (1), an adhesive layer (3) is fixedly provided on the surface of the aluminum-plastic film (2), a first air bag (4) is fixedly provided on the surface of the adhesive layer (3), a connecting block (5) is fixedly provided on the surface of the adhesive layer (3), a first protective plate (6) is fixedly provided on the surface of the connecting block (5), a spring (7) is fixedly provided on the side of the first protective plate (6) away from the battery cell body (1), one end of the spring (7) is fixedly connected to the first protective plate (6), a second protective plate (8) is fixedly provided on the other end of the spring (7), and a second air bag (9) is fixedly provided on the side of the first protective plate (6) away from the battery cell body (1).

2. A polymer battery cell with safety protection according to claim 1, characterized in that: A first air cavity (11) is provided inside the first air bag (4), and a second air cavity (10) is provided inside the second air bag (9).

3. A polymer battery cell with safety protection according to claim 1, characterized in that: The first protective plate (6) and the second protective plate (8) are made of the same material, both of which are made of high-hardness polyphenylene sulfide plates.

4. The polymer battery cell with safety protection according to claim 1, characterized in that: The first airbag (4) and the second airbag (9) are made of the same material, both made of nylon.

5. The polymer battery cell with safety protection according to claim 1, characterized in that: The number of the springs (7) is multiple, and the multiple springs (7) are distributed in a rectangular array on a side of the first protective plate (6) away from the battery cell body (1).

6. The polymer battery cell with safety protection according to claim 1, characterized in that: The number of the first protective plates (6) is two, and the two first protective plates (6) are symmetrically distributed on the upper and lower sides of the aluminum-plastic film (2).

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