CN211629235U

CN211629235U - High-temperature-resistant lithium battery

Info

Publication number: CN211629235U
Application number: CN201922393653.1U
Authority: CN
Inventors: 席晓飞; 曾庆传; 冯勇; 孟文愿
Original assignee: Huainan Youke New Energy Co ltd
Current assignee: Huainan Youke New Energy Co ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-10-02
Anticipated expiration: 2029-12-26

Abstract

The utility model discloses a high temperature resistant lithium cell, including shell, positive terminal, negative pole end, relief valve, packing ring, insulating piece, negative pole, positive pole, diaphragm, electric core and electrolyte. The shell comprises an aluminum plastic film, a transition layer and a heat-resistant layer; the separator includes an oxide particle layer, a synthetic resin layer, and a polyolefin porous film. The utility model discloses the heat resistance of battery has been improved again outside guaranteeing the basic electric conductive property of battery for the lithium cell can not cause the incident because of external temperature is too high, the too big scheduling problem emergence explosion of load power in the in-service use. Simple structure, strong practicability and wide application in various high-temperature environments. The problem of among the prior art lithium cell explosion caused the incident of being heated is solved.

Description

High-temperature-resistant lithium battery

Technical Field

The utility model belongs to the lithium cell field, concretely relates to high temperature resistant lithium cell.

Background

Lithium batteries are batteries using a nonaqueous electrolyte solution and lithium metal or a lithium alloy as an anode material. Because the lithium battery has the advantages of high energy density, high power density, more recycling times, long storage time and the like, the lithium battery is widely used in mobile phones, portable electronic equipment and the current electric vehicles, and particularly has wide application prospects in large and medium-sized electric equipment such as electric transportation and energy storage facilities.

However, in the existing lithium battery, the external environment temperature is too high, the battery load power is too large, the lithium battery generates heat, and the like, so that the lithium battery is easily subjected to thermal explosion to cause safety accidents. Therefore, the design of the high-temperature-resistant lithium battery is in line with the actual requirement.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model aims to provide a high temperature resistant lithium cell has solved the problem that lithium cell explosion under heat caused the incident among the prior art.

The purpose of the utility model can be realized by the following technical scheme:

the utility model provides a high temperature resistant lithium cell, includes the shell, be equipped with negative pole and positive pole in the shell, be equipped with the diaphragm between negative pole and the positive pole, be equipped with electric core between positive terminal and the negative pole end, be equipped with electrolyte between electric core and the positive pole.

The shell comprises an aluminum plastic film, a transition layer and a heat-resistant layer.

The separator includes an oxide particle layer, a synthetic resin layer, and a polyolefin porous film.

The two ends of the shell are provided with a positive end and a negative end, one end of the positive end is provided with a safety valve, the side ends of the safety valve and the positive end are provided with gaskets, and one end of each gasket is provided with an insulating sheet.

The aluminum-plastic film is arranged on the outermost side of the shell, and the transition layer is arranged between the aluminum-plastic film and the heat-resistant layer.

The oxide particle layer is arranged on the outermost side of the diaphragm, the oxide particle layer wraps the synthetic resin layer, and the synthetic resin layer is internally provided with a polyolefin porous membrane.

The utility model has the advantages that:

1. the utility model improves the heat resistance of the battery besides ensuring the basic conductivity of the battery, so that the lithium battery can not explode to cause safety accidents due to the problems of overhigh external temperature, overlarge load power and the like in the practical use;

2. the utility model discloses simple structure, the practicality is strong, can wide application in multiple high temperature environment.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a cross-sectional view of the overall structure of an embodiment of the present invention;

fig. 2 is a cross-sectional view of a housing of an embodiment of the invention;

fig. 3 is a cross-sectional view of a septum of an embodiment of the invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "open hole", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", and the like, indicate positional or positional relationships, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

As shown in fig. 1, the high-temperature resistant lithium battery comprises a housing 1, wherein a positive terminal 7 and a negative terminal 6 are arranged at two ends of the housing 1, a safety valve 8 is arranged at one end of the positive terminal 7, a gasket 9 is arranged at the side ends of the safety valve 8 and the positive terminal 7, and an insulating sheet 10 is arranged at one end of the gasket 9. Be equipped with negative pole 2 and anodal 4 in the shell 1, be equipped with diaphragm 3 between negative pole 2 and the anodal 4, be equipped with electric core 11 between anodal end 7 and the negative pole end 6, be equipped with electrolyte 5 between electric core 11 and the anodal 4.

As shown in fig. 2, the housing 1 includes an aluminum plastic film 101, a transition layer 102, and a heat-resistant layer 103, and the aluminum plastic film 101 is disposed at the outermost side. Wherein the aluminum plastic film 101 has extremely high barrier property; good cold stamping formability; puncture resistance; electrolyte resistance stability; and good insulating property. In actual use, the aluminum plastic film 101 can protect the lithium battery from being damaged by external force. The transition layer 102 is arranged between the aluminum plastic film 101 and the heat-resistant layer 103, the transition layer 102 is made of reticular cross-linked polyurethane, the reticular structure of the transition layer can play a role in buffering when the lithium battery is impacted by external force, and the polyurethane has high elasticity and strength, excellent wear resistance, oil resistance, fatigue resistance and shock resistance in a wide hardness range. The utility model discloses a lithium battery, including heat-resistant layer 103, micropore ceramic thermal barrier coating is porous structure and for ceramic material, and in the in-service use, the heat that the lithium cell produced passes through negative pole 2 and conducts to heat-resistant layer 103 after the micropore ceramic thermal barrier coating absorbs greatly reduced self temperature, has guaranteed the safe in utilization of lithium cell.

As shown in fig. 3, the separator 3 includes an oxide particle layer 301 disposed on the outermost side, the oxide particle layer 301 wrapping a synthetic resin layer 302, and the oxide particle layer 301 functions to fill a space and increase the specific heat capacity of the synthetic resin layer 302. A polyolefin porous membrane 303 is arranged in the synthetic resin layer 302, and the polyolefin porous membrane 303 has electronic insulation property and ensures the mechanical isolation of a positive electrode and a negative electrode; the electrolyte has better mechanical property and thermal stability, and ensures that the anode and the cathode of the battery are not damaged when the battery is heated in the use process.

It should be noted that the high temperature lithium battery can be normally used at a high temperature of 80 ℃.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.

Claims

1. A high-temperature-resistant lithium battery comprises a shell (1), and is characterized in that a negative electrode (2) and a positive electrode (4) are arranged in the shell (1), a diaphragm (3) is arranged between the negative electrode (2) and the positive electrode (4), an electric core (11) is arranged between a positive electrode end (7) and a negative electrode end (6), and an electrolyte (5) is arranged between the electric core (11) and the positive electrode (4);

the shell (1) comprises an aluminum-plastic film (101), a transition layer (102) and a heat-resistant layer (103);

the separator (3) comprises an oxide particle layer (301), a synthetic resin layer (302), and a polyolefin porous film (303).

2. The lithium high-temperature-resistant battery according to claim 1, wherein the case (1) is provided with a positive terminal (7) and a negative terminal (6) at both ends, a safety valve (8) is provided at one end of the positive terminal (7), a gasket (9) is provided at the side ends of the safety valve (8) and the positive terminal (7), and an insulating sheet (10) is provided at one end of the gasket (9).

3. A high temperature resistant lithium battery according to claim 1, wherein the aluminum plastic film (101) is disposed on the outermost side of the casing (1), and the transition layer (102) is disposed between the aluminum plastic film (101) and the heat resistant layer (103).

4. The lithium high-temperature-resistant battery according to claim 1, wherein the oxide particle layer (301) is disposed on the outermost side of the separator (3), the oxide particle layer (301) covers the synthetic resin layer (302), and the polyolefin porous film (303) is provided in the synthetic resin layer (302).