CN216161844U

CN216161844U - Novel battery pack burning delay prevention structure

Info

Publication number: CN216161844U
Application number: CN202122265209.9U
Authority: CN
Inventors: 叶伟军; 吴程; 陈星�; 杨庆宏; 邓通杭
Original assignee: Fujian Scud Power Technology Co Ltd
Current assignee: Scud Energy Technology Co ltd
Priority date: 2021-09-17
Filing date: 2021-09-17
Publication date: 2022-04-01
Anticipated expiration: 2031-09-17

Abstract

The utility model discloses a novel battery pack delay burning prevention structure, which comprises a battery cell and a battery cell module consisting of an upper bracket and a lower bracket arranged on two sides of the battery cell; the battery cell module side is fixed with a protection board through a screw, and the battery cell module side protection board is characterized in that: two ends of the battery cell module are provided with anti-delay parts; the anti-spread-burning component comprises a steel plate and a mica sheet which are connected; the mica sheet is arranged opposite to the end face of the battery cell module; an explosion-proof groove is formed in the mica sheet opposite to the positive electrode of the battery cell; and a through hole is formed in the position, opposite to the explosion-proof groove, of the steel plate. The mica sheet is used for insulating and flame-retardant property, the risk of battery fire is reduced, rapid heat conduction can be realized through the steel plate, the temperature of the battery is reduced, meanwhile, the anti-explosion groove opposite to the anode on the mica sheet can enable high-temperature electrolyte sprayed from the anode to be sprayed out from the cross groove when the battery is abnormally short-circuited, the high temperature caused by short circuit of a single battery cell is rapidly reduced, and the mica sheet and the anti-explosion groove are combined with the steel plate structure to rapidly absorb heat of the high-temperature electrolyte.

Description

Novel battery pack burning delay prevention structure

Technical Field

The utility model relates to the technical field of lithium batteries, in particular to a novel battery pack anti-delay burning structure.

Background

The lithium ion battery has the advantages of large energy density, small self-discharge, no memory effect, long cycle service life and the like; the lithium ion battery cell improves the voltage and the capacity of the whole battery by series-parallel connection, and can be suitable for various electric tools, and the safety design of the battery pack is always a key point and a difficult point. Traditional battery package does not consider the delay of preventing of battery package when the design and burns, and when single electric core aroused the burning because of inside short circuit, electric core temperature reached 500 ~ 600 ℃ if the temperature of electric core can't reduce rapidly, when the temperature of adjacent electric core rises to more than 140 ℃, adjacent electric core can take place the burning in succession to arouse that whole group battery takes place the burning.

For the above phenomena, the cells are arranged into a honeycomb structure as much as possible under the condition that the internal space allows, and the more the cells are adjacent, the better the heat dissipation effect on the cells is; or some structures capable of rapidly absorbing heat are added in the battery pack. But the heat dissipation effect is limited and the battery space is easily occupied.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a novel battery pack burning-delay-prevention structure which is good in burning-delay-prevention effect, excellent in heat dissipation, high in volume utilization rate and high in structural strength.

The utility model is realized by the following modes:

a novel battery pack delay burning prevention structure comprises a battery core 4 and a battery core module consisting of an upper bracket 2 and a lower bracket 3 which are arranged at two sides of the battery core; battery module side is fixed with protection shield 5, its characterized in that through screw 6: two ends of the battery cell module are provided with anti-delay parts; the anti-delay burning component comprises a steel plate 11 and a mica sheet 12 which are connected; the mica sheet 12 is arranged opposite to the end face of the battery cell module; an anti-explosion groove 13 is formed in the mica sheet 12 opposite to the positive electrode of the battery cell 4; and a through hole is formed in the position, opposite to the anti-explosion groove 13, of the steel plate 11.

Further, an insulating tape is arranged on the outer side of the steel plate 11.

Furthermore, a positioning hole 14 matched with the battery cell module is arranged on the mica sheet 12.

Further, the explosion-proof groove 13 is cross-shaped.

The utility model has the beneficial effects that: prevent through the steel sheet of integral type structure and the part that delays burning that the mica sheet is constituteed, utilize the insulating fire resistance of mica sheet, reduce the risk that the battery catches fire, can realize quick heat-conduction through the steel sheet, realize the cooling of battery, simultaneously on the mica sheet with anodal relative explosion-proof groove can be when the unusual short circuit of battery, the cross groove blowout can be followed to the high temperature electrolyte that the positive pole jetted out, reduce the high temperature that single electric core short circuit brought rapidly, and can absorb heat to high temperature electrolyte fast again rather than the combination steel sheet structure, holistic apron sub-assembly reaches a rapid cooling's effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is an exploded view of a flame retardant structure of the present invention;

FIG. 2 is a schematic view of the structure of the mica sheet of the present invention

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "provided," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in fig. 1-2, a novel battery pack burning-delay-preventing structure includes a battery core 4, and a battery core module composed of an upper bracket 2 and a lower bracket 3 disposed at two sides of the battery core; a protective plate 5 is fixed on the side of the battery cell module through a screw 6, and two ends of the battery cell module are provided with anti-delay parts; the anti-delay burning component comprises a steel plate 11 and a mica sheet 12 which are connected; the mica sheet 12 is arranged opposite to the end face of the battery cell module; an anti-explosion groove 13 is formed in the mica sheet 12 opposite to the positive electrode of the battery cell 4; and a through hole is formed in the position, opposite to the anti-explosion groove 13, of the steel plate 11.

Further, the explosion-proof groove 13 is cross-shaped.

The utility model relates to a flame-retardant component which consists of a steel plate and a mica sheet which are of an integrated structure, wherein the mica sheet is an insulation flame-retardant structure of a battery pack, the mica sheet has the characteristics of insulation and flame retardance and crisp texture, the strength of the mica sheet is greatly increased after the mica sheet is combined with the steel plate, and a cross-shaped groove characteristic is reserved on the mica sheet; the mica sheet and the steel plate are reserved with hole positions to be quickly positioned and assembled with the positioning holes of the bracket. Simultaneously, the structure of the integrated type can effectively reduce the occupation of the battery space, the energy density of the battery is improved, and the strength of the battery cell module can be effectively improved by the steel plate.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel battery pack burning-delay-preventing structure comprises a battery core (4) and a battery core module consisting of an upper bracket (2) and a lower bracket (3) which are arranged on two sides of the battery core module; electric core module side is fixed with protection shield (5), its characterized in that through screw (6): two ends of the battery cell module are provided with anti-delay parts; the anti-spread-burning component comprises a steel plate (11) and a mica sheet (12) which are connected; the mica sheet (12) is arranged opposite to the end face of the battery cell module; an anti-explosion groove (13) is formed in the mica sheet (12) opposite to the positive electrode of the battery cell (4); and a through hole is formed in the position, opposite to the explosion-proof groove (13), of the steel plate (11).

2. The novel battery pack burning-delay-prevention structure as claimed in claim 1, wherein: and an insulating adhesive tape is arranged on the outer side of the steel plate (11).

3. The novel battery pack burning-delay-prevention structure as claimed in claim 1, wherein: and the mica sheet (12) is provided with a positioning hole (14) matched with the battery cell module.

4. The novel battery pack burning-delay-prevention structure as claimed in claim 1, wherein: the explosion-proof groove (13) is in a cross shape.