CN213936427U

CN213936427U - Lithium battery pack explosion-proof device and lithium battery device formed by same

Info

Publication number: CN213936427U
Application number: CN202023138089.8U
Authority: CN
Inventors: 庄文生; 陈欣义; 陈明懂; 温尚龙
Original assignee: Guangzhou Guangzhu Battery Co ltd
Current assignee: Guangzhou Guangzhu Battery Co ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-08-10
Anticipated expiration: 2030-12-22

Abstract

The utility model discloses a lithium battery pack explosion-proof device and a lithium battery device composed of the same, wherein the lithium battery pack explosion-proof device comprises a shell and a heat dissipation fan, the shell comprises a cover body and a shell body used for accommodating a battery pack, the top of the shell body is provided with an opening, and the cover body covers the opening; the heat dissipation fan is installed in the shell, and the shell is provided with a heat dissipation structure, and the heat dissipation structure comprises a plurality of heat dissipation through holes, and the air outlet direction of the heat dissipation fan is arranged towards the heat dissipation structure. The sealing performance and the anti-explosion capability of the lithium battery device are improved by placing the battery pack into the shell; in addition, when the battery pack is charged and discharged, the heat dissipation fan is started and dissipates heat in the shell out of the shell, so that explosion of the battery pack caused by overhigh temperature in the shell is avoided, and the safety, especially the explosion resistance, of the lithium battery device is improved.

Description

Lithium battery pack explosion-proof device and lithium battery device formed by same

Technical Field

The utility model relates to a lithium cell group explosion-proof equipment and lithium cell device of constituteing among the battery technical field.

Background

The lithium ion battery is an environment-friendly chemical power supply with high energy density, long service life and little pollution; the lithium ion battery is widely applied to unmanned aerial vehicles, electric bicycles, electric automobiles, outdoor energy storage devices, solar street lamps, field illuminating lamps and the like. The battery pack can generate a large amount of heat due to chemical reaction in the charging and discharging processes of the lithium ion battery, the lithium ion battery pack with the common design has certain functions of cooling and a shell explosion-proof lamp, but the service life of the lithium ion battery pack is directly influenced and certain dangerousness is realized due to poor performance design of cooling effect, shell explosion-proof property and the like.

In addition, the existing lithium ion batteries are classified according to the shape and the packaging material, and the lithium ion battery monomers are mainly classified into square aluminum shells, polymer soft packages, steel shells and the like. The battery pack is subjected to outer wrapping protection by adopting an epoxy plate with the thickness of less than 1mm, and then is subjected to tightening treatment by using a PVC thermoplastic film. Because the PVC thermoplastic film is a cylindrical structure with two communicated ends, the upper end and the lower end of the PVC thermoplastic film cannot be sealed after thermal shrinkage and compaction, and therefore the PVC thermoplastic film cannot be waterproof, and moisture can enter the battery in the epoxy plate through the air ports of the upper section and the lower section in a humid environment, so that adverse reactions such as self-discharge or rusting of the battery can be caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a lithium cell group explosion-proof equipment and the lithium cell device of constituteing, explosion-proof performance and security are better.

According to an embodiment of the first aspect of the present invention, there is provided an explosion-proof device for a lithium battery pack, comprising a housing, wherein the housing comprises a cover body and a housing for accommodating the battery pack, an opening is formed at the top of the housing, and the cover body covers the opening; the heat dissipation fan is installed in the shell, be equipped with heat radiation structure on the shell, heat radiation structure includes a plurality of heat dissipation through-holes, the air-out direction of heat dissipation fan court heat radiation structure sets up.

According to the utility model discloses the embodiment of the first aspect, furtherly, be equipped with the fin in the casing, the fin with the group battery is connected, the fin with the air inlet direction of heat dissipation fan is relative.

According to the utility model discloses the embodiment of the first aspect, furtherly, the total area of heat dissipation through-hole is greater than the heat dissipation fan is in area of projection on the shell.

According to the utility model discloses the embodiment of first aspect, further, heat radiation structure's the outside is equipped with the waterproof shroud that can open and close.

According to the embodiment of the second aspect of the present invention, there is provided a lithium battery device, comprising a battery pack and the above-mentioned lithium battery pack explosion-proof device, wherein the battery pack is installed in the housing.

According to the utility model discloses the embodiment of second aspect, furtherly, the outside parcel of group battery has the silica gel layer, the outside on silica gel layer with the shell meets.

According to the utility model discloses the embodiment of the second aspect, furtherly, the group battery with be equipped with sealing glue layer between the silica gel layer.

The utility model has the advantages that: the sealing performance and the anti-explosion capability of the lithium battery device are improved by placing the battery pack into the shell; in addition, when the battery pack is charged and discharged, the heat dissipation fan is started and dissipates heat in the shell out of the shell, so that explosion of the battery pack caused by overhigh temperature in the shell is avoided, and the safety, especially the explosion resistance, of the lithium battery device is improved.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

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

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1, the explosion-proof device for a lithium battery pack in an embodiment of the present invention includes a housing and a heat dissipation fan 30, the housing includes a cover 21 and a casing 20 for accommodating a battery pack 10, an opening is disposed at the top of the casing 20, and the cover 21 covers the opening. The cover 21 and the case 20 together form a sealed space for installing the battery pack 10, and the housing is made of steel or stainless steel, which can prevent water vapor from entering the battery pack 10 and has a certain anti-explosion capability.

The heat dissipation fan 30 is installed in the housing, and the housing is provided with a heat dissipation structure, and the heat dissipation structure includes a plurality of heat dissipation through holes 31, and the air outlet direction of the heat dissipation fan 30 is set toward the heat dissipation structure. The heat dissipation through-holes 31 may be micro-holes having a diameter of 1mm to prevent other impurities from entering the case and affecting the normal operation of the battery pack 10. In the present embodiment, the heat sink is mounted in the case 20, that is, the heat sink is located above the battery pack 10. When the battery pack 10 is charged and discharged, in order to prevent the battery pack 10 from exploding due to an excessively high temperature, the heat dissipation fan 30 is automatically started, and the heat dissipation fan 30 discharges the heat in the housing through the heat dissipation through hole 31, so that the temperature in the housing is reduced, the operation safety of the battery pack 10 is improved, and the risk of explosion due to a high temperature is reduced. Further, a heat sink is disposed in the casing 20, the heat sink is connected to the battery pack 10, and the heat sink is opposite to the air inlet direction of the heat dissipation fan 30, specifically, the heat sink is connected to the top surface of the battery pack 10, the heat of the battery pack 10 can be uniformly conducted to the heat sinks, so as to increase the heat dissipation rate, and the heat dissipation fan 30 blows out the heat dissipated by the heat sink. Further, in order to improve the heat dissipation efficiency of the heat dissipation fan 30, the total area of the heat dissipation through holes 31 is larger than the projection area of the heat dissipation fan 30 on the housing.

In some embodiments, a waterproof cover capable of being opened and closed is arranged on the outer side of the heat dissipation structure. When the battery pack 10 is charged and discharged and the heat dissipation fan 30 is started, the waterproof cover may be opened to discharge heat inside the case; when the heat dissipation fan 30 stops and the battery pack 10 does not generate heat, the waterproof cover can be closed, so that rainwater or moist gas is prevented from entering the wall of the battery pack 10, and the explosion risk of the battery pack 10 is reduced.

The lithium battery device in the embodiment of the second aspect of the present invention includes the battery pack 10 and the above-mentioned lithium battery pack explosion-proof device, and the battery pack 10 is installed in the housing 20. The outer side of the battery pack 10 is wrapped with a silica gel layer 12, and the outer side of the silica gel layer 12 is connected with the shell. Because silica gel layer 12 has wrapped group battery 10, consequently can isolated circulation of air and group battery 10 inside to play dampproofing, waterproof, fireproof sealed effect, in addition, silica gel has certain elasticity, so can play certain cushioning effect, avoids group battery 10 to be collided and warp. Further, in order to enhance the connection tightness between the battery pack 10 and the silicone layer 12, a sealant layer 11 is disposed between the battery pack 10 and the silicone layer 12.

Firstly, fully coating fireproof silica gel on the inner side of the shell 20, coating sealant on the outer side of the battery pack 10, then putting the battery pack 10 into the shell 20, so that the silica gel can fully fill the gap between the battery pack 10 and the shell 20, then coating fireproof silica gel on the top surface of the battery pack 10 to completely cover the battery pack 10, and covering the cover body 21 on the opening of the shell 20, thereby completing the assembly of the lithium battery device.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims

1. An explosion-proof equipment of lithium cell group which characterized in that, includes:

the battery pack comprises a shell, a battery pack and a battery pack, wherein the shell comprises a cover body (21) and a shell body (20) used for accommodating the battery pack (10), an opening is formed in the top of the shell body (20), and the cover body (21) covers the opening;

heat dissipation fan (30), heat dissipation fan (30) are installed in the shell, be equipped with heat radiation structure on the shell, heat radiation structure includes a plurality of heat dissipation through-holes (31), the air-out direction court of heat dissipation fan (30) heat radiation structure sets up.

2. The lithium battery pack explosion-proof device of claim 1, wherein: the battery pack is characterized in that a radiating fin is arranged in the shell (20), the radiating fin is connected with the battery pack (10), and the radiating fin is opposite to the air inlet direction of the radiating fan (30).

3. The lithium battery pack explosion-proof device of claim 1, wherein: the total area of the heat dissipation through holes (31) is larger than the projection area of the heat dissipation fan (30) on the shell.

4. The lithium battery pack explosion-proof device of claim 1, wherein: and a waterproof cover capable of being opened and closed is arranged on the outer side of the heat dissipation structure.

5. A lithium battery device characterized in that: comprising a battery (10) and a lithium battery explosion protection device according to any one of claims 1 to 4, the battery (10) being mounted in the housing (20).

6. The lithium battery device as claimed in claim 5, wherein: the outer side of the battery pack (10) is wrapped by a silica gel layer (12), and the outer side of the silica gel layer (12) is connected with the shell.

7. The lithium battery device as claimed in claim 6, wherein: and a sealing adhesive layer (11) is arranged between the battery pack (10) and the silica gel layer (12).