CN211957702U

CN211957702U - Heat release explosion-proof lithium ion battery

Info

Publication number: CN211957702U
Application number: CN202020553729.2U
Authority: CN
Inventors: 赵恒�
Original assignee: Guangdong An Energy Technology Co ltd
Current assignee: Guangdong An Energy Technology Co ltd
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2020-11-17
Anticipated expiration: 2030-04-14

Abstract

The utility model provides a heat-release explosion-proof lithium ion battery, which comprises a heat-radiating shell, wherein an electric core is arranged in the heat-radiating shell, an insulating heat-radiating cover is fixed at the opening of the heat-radiating shell, the electric core is fixedly connected to the bottom of the insulating heat-radiating cover, electrolyte is filled in the heat-radiating shell, and a plurality of external heat-conducting raised bars are fixed on the outer surface of the heat-radiating shell; electric core has first graphite alkene layer including range upon range of positive plate, diaphragm and the negative pole piece of rolling up, the surface covering of positive plate has second graphite alkene layer, and positive plate is connected with anodal ear, and the negative pole piece is connected with the negative pole ear, and anodal ear and negative pole ear all pass the setting of insulating cooling lid. The utility model discloses a graphite alkene layer can show the heat exchange efficiency who improves electric core and electrolyte, can effectively avoid the heat to gather with electric core in, in addition, the outer heat conduction sand grip on heat dissipation shell and surface can further improve lithium ion battery and release external efficiency with the heat.

Description

Heat release explosion-proof lithium ion battery

Technical Field

The utility model relates to a lithium ion battery specifically discloses a heat release explosion-proof type lithium ion battery.

Background

A lithium ion battery is a high-performance battery that operates by using a lithium-containing compound as a positive electrode and a carbon material as a negative electrode and by moving lithium ions between the positive electrode and the negative electrode. The lithium ion battery has the advantages of long service life, low self-discharge rate, environmental protection, energy conservation and the like.

Lithium ion battery can produce certain heat at the charge-discharge in-process, leads to lithium ion battery's temperature to rise, in case the high temperature can influence lithium ion battery's performance, in case the high temperature, lithium ion battery still can produce irreversible adverse reaction influences such as swell, shortens lithium ion battery's life greatly, still can lead to the emergence of conflagration or even explosion when serious, has the potential safety hazard.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a heat-release explosion-proof lithium ion battery, which has high heat-release performance and can avoid safety problems caused by over-high temperature of the lithium ion battery during the operation process, in view of the problems in the prior art.

In order to solve the prior art problem, the utility model discloses a heat-release explosion-proof lithium ion battery, which comprises a heat-dissipation shell, wherein an electric core is arranged in the heat-dissipation shell, an insulating heat-dissipation cover is fixed at the opening of the heat-dissipation shell, the electric core is fixedly connected to the bottom of the insulating heat-dissipation cover, electrolyte is also filled in the heat-dissipation shell, and a plurality of external heat-conducting convex strips are fixed on the outer surface of the heat-dissipation shell;

electric core is including range upon range of positive plate, diaphragm and the negative pole piece of rolling up, and the diaphragm is located between positive plate and the negative pole piece, and the surface covering of positive plate has first graphite alkene layer, and the surface covering of negative pole piece has second graphite alkene layer, and positive plate is connected with positive tab, and the negative pole piece is connected with the negative pole ear, and positive tab and negative pole ear all pass the setting of insulating cooling lid.

Further, the heat dissipation shell is a heat dissipation ceramic shell.

Furthermore, a plurality of inner heat conducting raised strips are fixed inside the heat radiating shell.

Furthermore, the inner wall of the heat dissipation shell is covered with a sealing film, and the sealing film is also covered on one side of the insulating heat dissipation cover close to the battery core.

Further, the sealing film is an aluminum plastic film.

Furthermore, the insulating heat dissipation cover is a heat-conducting silica gel cover.

Furthermore, a first radiating fin and a second radiating fin which are mutually spaced are arranged in the insulating radiating cover, the first radiating fin is fixedly connected with the positive tab, and the second radiating fin is fixedly connected with the negative tab.

The utility model has the advantages that: the utility model discloses a heat release explosion-proof type lithium ion battery is provided with special electric core structure, can show the heat exchange efficiency who improves electric core and electrolyte through the graphite alkene layer on positive plate and negative plate surface, can effectively avoid the heat to gather with electric core in, in addition, the outer heat conduction sand grip on heat dissipation shell and surface can further improve lithium ion battery and release the external efficiency with the heat, can avoid lithium ion battery high temperature and induce the safety problem in the course of the work.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is the structure diagram of the middle cell of the present invention.

The reference signs are: the heat dissipation structure comprises a heat dissipation shell 10, outer heat conduction convex strips 11, inner heat conduction convex strips 12, a sealing film 13, a battery cell 20, a positive plate 21, a first graphene layer 211, a diaphragm 22, a negative plate 23, a second graphene layer 231, a positive tab 24, a negative tab 25, an insulating heat dissipation cover 30, first heat dissipation fins 31, second heat dissipation fins 32 and electrolyte 40.

Detailed Description

For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Refer to fig. 1 and 2.

The embodiment of the utility model discloses a heat release explosion-proof type lithium ion battery, including heat dissipation shell 10, be equipped with electric core 20 in the heat dissipation shell 10, the opening part of heat dissipation shell 10 is fixed with insulating heat dissipation cover 30 through glue, insulating heat dissipation cover 30 has good heat dispersion, electric core 20 fixed connection is in the bottom of insulating heat dissipation cover 30, electric core 20 directly contacts with insulating heat dissipation cover 30 can further improve the radiating efficiency of electric core 20, still pack electrolyte 40 in the heat dissipation shell 10, the surface of heat dissipation shell 10 is fixed with a plurality of outer heat conduction sand grips 11 with heat dissipation shell 10 integrated into one piece, outer heat conduction sand grip 11 can effectively improve the area of contact of heat dissipation shell 10 and air, can effectively improve the heat conductivility of heat dissipation shell 10, avoid heat accumulation and lithium ion battery and induce conflagration or even explosion;

the battery cell 20 comprises a positive plate 21, a diaphragm 22 and a negative plate 23 which are wound in a laminated manner, the diaphragm 22 is provided with two sheets, the diaphragm 22 is located between the positive plate 21 and the negative plate 23, preferably, the positive plate 21, the diaphragm 22, the negative plate 23 and another diaphragm 22 are wound in sequence and laminated to obtain the battery cell 20, one side or two sides of the positive plate 21 are covered with a first graphene layer 211, one side or two sides of the negative plate 23 are covered with a second graphene layer 231, the graphene has good conductivity and heat conductivity, the heat dissipation efficiency of the battery cell 20 can be effectively improved while the normal operation of the battery cell 20 is ensured, the heat generated during the operation of the positive plate 21 and the negative plate 23 is efficiently transferred to the electrolyte 40 by the first graphene layer 211 and the second graphene layer 231, and the electrolyte 40 releases the heat to the external environment through the insulating heat dissipation cover 30 and the heat dissipation housing 10, thereby effectively reducing the heat and gathering in electric core 20, positive plate 21 is connected with anodal ear 24, and negative pole piece 23 is connected with negative pole ear 25, and anodal ear 24 and negative pole ear 25 all pass the top setting of insulating cooling cap 30, connect with electrical apparatus or charger and bulge behind anodal ear 24 and the negative pole ear 25 of insulating cooling cap 30, can use lithium ion battery to realize discharging or charging.

In this embodiment, the heat dissipation housing 10 is a heat dissipation ceramic shell, that is, the heat dissipation housing 10 is an alumina ceramic shell, and has good insulating property and heat conducting property.

In this embodiment, a plurality of inner heat conducting protruding strips 12 integrally formed with the heat dissipating housing 10 are fixed inside the heat dissipating housing 10, and the inner heat conducting protruding strips 12 can effectively increase the contact area between the heat dissipating housing 10 and the electrolyte 40, thereby effectively increasing the release efficiency of the internal heat of the lithium ion battery.

In this embodiment, the inner wall of the heat dissipation housing 10 is covered with the sealing film 13, the sealing film 13 is further covered on one side of the insulating heat dissipation cover 30 close to the battery cell 20, the sealing film 13 can effectively improve the sealing performance of the lithium ion battery, and can effectively avoid liquid leakage, and when the inner heat conduction protruding strips 12 are arranged in the heat dissipation housing 10, the sealing film 13 covers the surface of the inner heat conduction protruding strips 12.

Based on the above embodiment, the sealing film 13 is an aluminum plastic film, which has good barrier property, strong puncture resistance, and can maintain good stability in the environment of the electrolyte 40.

In the present embodiment, the insulating heat dissipation cover 30 is a heat conductive silicone cover, and the heat conductive silicone has good heat dissipation performance and insulation performance.

Based on the above embodiment, the insulating heat dissipation cover 30 is provided with the first heat dissipation fins 31 and the second heat dissipation fins 32 which are spaced from each other, the first heat dissipation fins 31 are fixedly connected with the positive tab 24, the second heat dissipation fins 32 are fixedly connected with the negative tab 25, and the heat exchange efficiency between the positive tab 24 and the negative tab 25 and the insulating heat dissipation cover 30 can be effectively improved through the heat dissipation fins, so that the heat release efficiency of the lithium ion battery is further improved.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The heat-release explosion-proof lithium ion battery is characterized by comprising a heat-dissipation shell (10), wherein a battery cell (20) is arranged in the heat-dissipation shell (10), an insulating heat-dissipation cover (30) is fixed at an opening of the heat-dissipation shell (10), the battery cell (20) is fixedly connected to the bottom of the insulating heat-dissipation cover (30), electrolyte (40) is filled in the heat-dissipation shell (10), and a plurality of outer heat-conducting convex strips (11) are fixed on the outer surface of the heat-dissipation shell (10);

electric core (20) are including range upon range of positive plate (21), diaphragm (22) and negative pole piece (23) around rolling up, diaphragm (22) are located positive plate (21) with between negative pole piece (23), the surface covering of positive plate (21) has first graphite alkene layer (211), the surface covering of negative pole piece (23) has second graphite alkene layer (231), positive plate (21) are connected with anodal ear (24), negative pole piece (23) are connected with negative pole ear (25), anodal ear (24) with negative pole ear (25) all pass insulating cooling cap (30) set up.

2. The lithium ion battery of claim 1, wherein the heat dissipation housing (10) is a heat dissipation ceramic case.

3. The lithium ion battery of claim 1, wherein a plurality of inner heat conducting ribs (12) are fixed inside the heat dissipation casing (10).

4. The lithium ion battery of claim 1 or 3, wherein the inner wall of the heat dissipation shell (10) is covered with a sealing film (13), and the sealing film (13) is further covered on one side of the insulating heat dissipation cover (30) close to the battery core (20).

5. The lithium ion battery of claim 4, wherein the sealing film (13) is an aluminum plastic film.

6. The lithium ion battery of claim 1, wherein the insulating and heat dissipating cover (30) is a thermally conductive silicone cover.

7. The heat release explosion-proof lithium ion battery according to claim 6, wherein a first heat dissipation fin (31) and a second heat dissipation fin (32) are arranged in the insulating heat dissipation cover (30) and are spaced from each other, the first heat dissipation fin (31) is fixedly connected with the positive tab (24), and the second heat dissipation fin (32) is fixedly connected with the negative tab (25).