CN210984842U - Lithium battery pack with explosion-proof protection structure - Google Patents

Abstract

The utility model discloses a lithium battery pack with an explosion-proof protection structure, which comprises connecting plates arranged on the left and the right, wherein a plurality of lithium ion battery single sheets and protection plates are arranged between the two connecting plates, and one lithium ion battery single sheet is arranged between the adjacent protection plates; the protection plate comprises a bakelite plate and heat-conducting explosion-proof insulation sheets symmetrically arranged on two sides of the bakelite plate, and the bakelite plate is provided with a plurality of first through holes; the upper end of the connecting plate is provided with an upper lug plate, and the lower end of the connecting plate is provided with a lower lug plate; the upper end of the upper ear plate is provided with an upper shell, and the lower end of the lower ear plate is provided with a lower shell; the two connecting plates are connected together through a stainless steel connecting piece, and the stainless steel connecting piece penetrates through the connecting plates and the plurality of protective plates simultaneously. The utility model discloses lithium cell group weight with explosion-proof protection architecture is light, and fire behavior is good, and the heat dissipation is fast, and the explosion-proof is high, and anti-seismic performance is high.

Description

Lithium battery pack with explosion-proof protection structure

Technical Field

The utility model relates to a lithium ion electron technical field especially relates to a lithium cell group with explosion-proof protection architecture.

Background

The types of the explosion of the battery cell can be classified into an external short circuit, an internal short circuit, and an overcharge. The outside here refers to the outside of the battery cell, and includes short circuits caused by poor insulation design inside the battery pack. When the short circuit occurs outside the battery core and the electronic assembly fails to cut off the loop, high heat can be generated inside the battery core, partial electrolyte is vaporized, and the battery shell is enlarged. The explosion caused by the internal short circuit is mainly caused by overcharge. At present, the explosion prevention can be focused on three aspects of overcharge prevention, external short circuit prevention and cell safety improvement. The overcharge prevention and the external short circuit prevention belong to electronic protection, and have a large relationship with the design of a battery system and the assembly of a battery. The key point for improving the safety of the battery cell is chemical and mechanical protection. Generally, the explosion-proof protection design for the lithium battery pack is that a circuit board of the electronic product provides first protection, and a protection board on the battery pack provides second protection.

Chinese patent document, application number is "201910884187.9", is named "a novel explosion proof lithium ion battery"'s utility model patent document, and the lithium ion battery explosion proof technology that wherein record mainly is with regard to its mechanical protection, and belongs to the technical scheme who improves the radiating efficiency. On this technique, the utility model provides a new explosion-proof protection architecture, from the prevention of short circuit, mechanical protection starting, the protection form that adopts the sheetmetal between the lithium ion battery monolithic has increased the whole weight of lithium ion battery group in the utility model patent file of "a novel explosion-proof lithium ion battery" has solved, removes the problem that the process of unloading needs stronger labour. Simultaneously solves the problems that the air in the lower shell is not circulated and is not beneficial to heat dissipation,

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a lithium cell group with explosion-proof protection architecture solves the problem that lithium cell group self weight is big, the heat dissipation remains further to be improved.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model relates to a lithium battery pack with an explosion-proof protection structure, which comprises connecting plates arranged on the left and right sides, wherein a plurality of lithium ion battery single sheets and protection plates are arranged between the two connecting plates, and a lithium ion battery single sheet is arranged between the adjacent protection plates; the protection plate comprises a bakelite plate and heat conduction explosion-proof insulation sheets symmetrically arranged on two sides of the bakelite plate, and the bakelite plate is provided with a plurality of first through holes; the upper end of the connecting plate is provided with an upper lug plate, and the lower end of the connecting plate is provided with a lower lug plate; the upper end of the upper ear plate is provided with an upper shell, and the lower end of the lower ear plate is provided with a lower shell; the two connecting plates are connected together through a stainless steel connecting piece, and the stainless steel connecting piece penetrates through the connecting plates and the plurality of protective plates simultaneously.

Furthermore, four limiting pieces are arranged on the bakelite plate in an up-down, left-right mode, and the lithium ion battery single piece is located between the four limiting pieces.

Furthermore, a lifting handle is arranged in the middle of the upper shell.

Further, the lower shell is of a box body structure with a hole in the middle, and the lower structure of the lithium battery pack is placed inside the box body.

Furthermore, a plurality of second through holes are formed in the side wall of the lower shell.

Furthermore, the bakelite plate and the heat-conducting explosion-proof insulation sheets on the two sides are bonded together or pressed into an integral structure.

Compared with the prior art, the utility model discloses a beneficial technological effect:

the utility model discloses a lithium cell group with explosion-proof protection architecture has replaced traditional sheetmetal protection architecture with the protection shield, has avoided the emergence of the inside short circuit condition of lithium cell group. The bakelite plate in the middle of the protective plate is high in fire-proof grade, good in insulating property and strong in hardness, and can achieve the shock-proof effect of metal materials, and in addition, the heat-conducting explosion-proof insulating sheets on two sides of the bakelite plate can be liquefied after reaching the melting point of the heat-conducting explosion-proof insulating sheets, so that a first through hole and an external communication on the bakelite plate are realized, the pressure inside the lithium battery pack is reduced, the possibility of explosion is reduced, and the heat dissipation performance is also. In addition, the second through hole formed in the lower shell achieves the purpose of heat dissipation, and the explosion possibility of the lithium battery pack is further reduced. In a word, the utility model discloses lithium cell group with explosion-proof protection architecture weight is light, and fire behavior is good, and the heat dissipation is fast, and the explosion-proof is high, and anti-seismic performance is high.

Drawings

The present invention will be further explained with reference to the following description of the drawings.

Fig. 1 is a schematic diagram of the internal structure of a lithium battery pack with an explosion-proof protection structure according to the present invention;

fig. 2 is a schematic diagram of the overall structure of the lithium battery pack with the explosion-proof protection structure according to the present invention;

fig. 3 is a schematic structural view of a protection plate of a lithium battery pack with an explosion-proof protection structure according to the present invention;

description of reference numerals: 1. a lithium ion battery single sheet; 2. a protection plate; 2-1, bakelite board; 2-2, heat-conducting explosion-proof insulation sheets; 2-3, a first through hole; 3. a lower ear plate; 4. a connecting plate; 5. an upper ear plate; 6. a stainless steel connector; 7. a limiting sheet; 8. an upper housing; 9. a lower housing; 9-1 and a second through hole; 10. a handle.

Detailed Description

As shown in fig. 1 to 3, a lithium battery pack with an explosion-proof protection structure comprises two connecting plates 4 distributed left and right, wherein a plurality of lithium ion battery single sheets 1 and protection plates 2 are installed between the two connecting plates 4, and one lithium ion battery single sheet 1 is installed between adjacent protection plates 2. Four limiting pieces 7 are arranged on the bakelite plate 2-1 in an up-down, left-right mode, and the lithium ion battery single sheet 1 is located between the four limiting pieces 7. The specific number of the protective plates 2 is one more than the number of the battery pieces 1. The protection plate 2 comprises a bakelite plate 2-1 and heat-conducting explosion-proof insulation sheets 2-2 symmetrically arranged on two sides of the bakelite plate 2-1. The heat-conducting explosion-proof insulation sheet 2-2 can be formed by pressing PP-PE-PP, and the surface can be coated with materials with good heat conductivity, such as hot silicone grease and the like. The bakelite plate 2-1 and the heat-conducting explosion-proof insulation sheets 2-2 at the two sides are bonded together or pressed into an integral structure. The bakelite plate 2-1 is provided with a plurality of through holes 2-3 for heat dissipation and ventilation of outside air.

The upper end of the connecting plate 4 is welded with an upper ear plate 5, and the lower end of the connecting plate is welded with a lower ear plate 3. Go up 5 upper ends of otic placode and have last casing 8 through bolted connection, install handle 10 on the 8 intermediate positions of last casing, conveniently take. The lower end of the lower ear plate 3 is connected with a lower shell 9 through a bolt, the lower shell 9 is of a box structure with a hole in the middle, and the lower structure of the lithium battery pack is placed inside the box. In addition, the side wall of the lower shell 9 is provided with a plurality of through holes II 9-1 for the heat dissipation of the lithium battery pack.

The two connecting plates 4 are connected together through a stainless steel connecting piece 6, and the stainless steel connecting piece 6 penetrates through the connecting plates 4 and the plurality of protective plates 2 simultaneously.

When the temperature in the lithium battery pack reaches a certain temperature, the heat conduction explosion-proof insulation sheet 2-2 in contact with the lithium ion battery single sheet 1 reaches a melting point to be melted, the bakelite plate 2-1 is directly exposed, and the through holes I2-3 on the bakelite plate can not only dissipate heat, but also exchange with external air, so that the internal pressure of the lithium battery pack is reduced, the explosion possibility is reduced, and the explosion-proof purpose is achieved.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.

Claims (6)

1. The utility model provides a lithium cell group with explosion-proof protection architecture which characterized in that: the lithium ion battery protection plate comprises connecting plates (4) arranged on the left and right, wherein a plurality of lithium ion battery single sheets (1) and protection plates (2) are arranged between the two connecting plates (4), and one lithium ion battery single sheet (1) is arranged between the adjacent protection plates (2); the protection plate (2) comprises a bakelite plate (2-1) and heat conduction explosion-proof insulation sheets (2-2) symmetrically arranged on two sides of the bakelite plate (2-1), and a plurality of first through holes (2-3) are formed in the bakelite plate (2-1); the upper end of the connecting plate (4) is provided with an upper ear plate (5), and the lower end is provided with a lower ear plate (3); an upper shell (8) is arranged at the upper end of the upper ear plate (5), and a lower shell (9) is arranged at the lower end of the lower ear plate (3); two link together through stainless steel connecting piece (6) between connecting plate (4), stainless steel connecting piece (6) run through connecting plate (4) and a plurality of protection shield (2) simultaneously.

2. The lithium battery pack with an explosion-proof protection structure according to claim 1, wherein: four limiting pieces (7) are arranged on the bakelite plate (2-1) in an up-down, left-right mode, and the lithium ion battery single piece (1) is located between the four limiting pieces (7).

3. The lithium battery pack with an explosion-proof protection structure according to claim 1, wherein: a handle (10) is arranged in the middle of the upper shell (8).

4. The lithium battery pack with an explosion-proof protection structure according to claim 1, wherein: the lower shell (9) is of a box body structure with a hole in the middle, and the lower structure of the lithium battery pack is placed inside the box body.

5. The lithium battery pack with an explosion-proof protection structure according to claim 1, wherein: the side wall of the lower shell (9) is provided with a plurality of second through holes (9-1).

6. The lithium battery pack with an explosion-proof protection structure according to claim 1, wherein: the bakelite plate (2-1) and the heat-conducting explosion-proof insulation sheets (2-2) at the two sides are bonded together or pressed into an integral structure.

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