CN211789178U

CN211789178U - Lithium battery thermal runaway protector

Info

Publication number: CN211789178U
Application number: CN202020613476.3U
Authority: CN
Inventors: 周文星; 张艳; 沈晓斌; 朱咸龙
Original assignee: Huai'an Junsheng New Energy Technology Co ltd
Current assignee: Huai'an Junsheng New Energy Technology Co ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2020-10-27
Anticipated expiration: 2030-04-22

Abstract

The utility model discloses a lithium battery thermal runaway protector, which relates to the technical field of lithium battery thermal runaway protection, and comprises a shell, wherein a placing groove is arranged in the shell, a heat insulation component is arranged in the placing groove, the heat insulation component comprises a heat insulation device, a FPC component is arranged at the top of the heat insulation device, two first blocking pieces are symmetrically arranged at the bottom of the heat insulation device in two sides, a second blocking piece is arranged at the position of the bottom of the heat insulation device, which is close to one side of the first blocking piece, one side of the second blocking piece is bonded with a mica paper board through glue, one side of the mica paper board is bonded with a ceramic felt board through glue, and one side of the ceramic felt board is bonded with a foam board through glue, the utility model solves the problem that only foam is arranged between an electric core and the electric core, the effect of no heat insulation is poor through the second blocking piece, and through the heat, the problems of multiple parts and complex assembly are solved.

Description

Lithium battery thermal runaway protector

Technical Field

The utility model belongs to the technical field of lithium cell thermal protection, concretely relates to lithium cell thermal runaway protector.

Background

Power lithium cell group connects in the use on the electrical part, because a plurality of lithium cells are close together, calorific capacity is big, the heat is very big to the lithium cell injury, the lithium cell generates heat unusually and lithium cell thermal runaway appears, need use lithium cell thermal protector to protect the lithium cell this moment, avoid whole lithium cell group to take place to damage, still there is the weak point when current lithium cell thermal runaway protector uses, only place the bubble cotton between electric core and the electric core, electric core thermal runaway appears when a slice, unable timely isolated heat and intensity of a fire, and lithium cell thermal runaway protector part is many, the big assembly of weight is complicated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lithium cell thermal runaway protector to only place the bubble cotton between the electric core that proposes in solving above-mentioned background art and the electric core, it is poor to have isolated thermal effect, and the part is many, assembles complicated problem.

In order to achieve the above object, the utility model provides a following technical scheme: a lithium battery thermal runaway protector comprises a shell, wherein a placing groove is formed in the shell, a heat insulation assembly is installed in the placing groove, the heat insulation assembly comprises a heat insulation device, and an FPC assembly is installed at the top of the heat insulation device;

two first separation blades are symmetrically installed on two sides of the bottom of the heat insulation device, and a second separation blade is installed at a position, close to one side of the first separation blade, of the bottom of the heat insulation device.

Preferably, one side of the second baffle plate is bonded with a mica paper plate through glue, one side of the mica paper plate is bonded with a ceramic felt plate through glue, and one side of the ceramic felt plate is bonded with a foam board through glue.

Preferably, a mica sheet is installed on one side of the first separation blade, and a battery core is installed between the first separation blade and the second separation blade.

Preferably, the inner wall of the shell is provided with a sliding rail, the outer wall of the first blocking piece is provided with a sliding plate, and the sliding plate is arranged inside the sliding rail.

Preferably, the second blocking piece is rectangular, a groove is formed in the surface of the second blocking piece, and one side of the mica paper board is clamped in the groove.

Preferably, the battery cell baffles are arranged at the bottom inside the shell, the number of the battery cell baffles is five, and the bottom of the battery cell is placed between the two battery cell baffles.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses a second separation blade, second separation blade are the three-layer, and the multilayer protection can effectively completely cut off the heat between electric core and the electric core, when guaranteeing that thermal runaway appears, and the heat on the electric core can not conduct each other, has solved and has only placed the bubble cotton between electric core and the electric core, does not have the poor problem of isolated thermal effect.

(2) The utility model discloses a heat-proof device, it has first separation blade and second separation blade to paste through glue on the heat-proof device, has reduced part quantity, simple structure, and convenient assembly has saved user's assemble duration, has solved the part many, assembles complicated problem.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the heat insulation device of the present invention;

FIG. 3 is a front view of the thermal insulation apparatus of the present invention;

FIG. 4 is an enlarged view of portion A of FIG. 3;

in the figure: 1-electric core; 2-heat insulation means; 3-an FPC assembly; 4-placing the groove; 41-a slide rail; 42-cell baffle; 5-a housing; 6-a first baffle plate; 61-a slide plate; 7-a second baffle plate; 8-mica sheets; 9-mica cardboard; 10-ceramic felt board; 11-foam board.

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 in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides the following technical solutions: a lithium battery thermal runaway protector comprises a shell 5, a placing groove 4 is formed in the shell 5, a heat insulation assembly is mounted in the placing groove 4 and comprises a heat insulation device 2, an FPC assembly 3 is mounted at the top of the heat insulation device 2, the FPC assembly 3 is a flexible circuit board, the FPC assembly 3 is a flexible printed circuit board which is made of polyimide or polyester film serving as a base material and has high reliability and excellent flexibility, and an electric device meeting the normal work of a circuit is mounted on the FPC assembly 3;

two first separation blades 6 are installed to heat-proof device 2's bottom bilateral symmetry, one side position department that the bottom of stating heat-proof device 2 is close to first separation blade 6 installs second separation blade 7, the length of first separation blade 6 and second separation blade 7 is greater than the length of electric core 1, second separation blade 7 is provided with threely altogether, first separation blade 6 is provided with two altogether, four electric cores 1 have been placed in heat-proof device 2, four electric cores 1 are through establishing ties together, then pull out the electric wire from heat-proof device 2's top, and connect on FPC subassembly 3.

Further, one side of second baffle 7 has mica cardboard 9 through the glue bonding, one side of mica cardboard 9 has ceramic felt board 10 through the glue bonding, and one side of ceramic felt board 10 has bubble cotton board 11 through the glue bonding, mica cardboard 9, ceramic felt board 10 and bubble cotton board 11 glue together, and glue at second baffle 7, can be used for thermal-insulated, the rigidity of second baffle 7 has also been strengthened simultaneously, heat-proof device 2 is more durable, when the electric core unit of one of them cluster takes place thermal runaway, because thermal-insulated and fire prevention effect of three second baffle 7, can prevent to influence other electric core units.

Further, mica sheet 8 is installed to one side of first separation blade 6, installs electric core 1 between first separation blade 6 and the second separation blade 7, and glue bonding is passed through with the inside bottom of shell 5 in the bottom of electric core 1, scribbles in advance at the inside bottom of shell 5 and establishes one deck glue, then inserts electric core 1 in heat-proof device 2, the fixed of electric core 1 of being convenient for.

Further, the inner wall of the housing 5 is provided with a slide rail 41, the outer wall of the first blocking piece 6 is provided with a slide plate 61, and the slide plate 61 is arranged inside the slide rail 41.

Further, the second baffle 7 is rectangular, a groove is formed in the surface of the second baffle 7, one side of the mica paper board 9 is clamped in the groove, glue is coated in the groove, and the mica paper board 9 is placed in the groove, so that the mica paper board 9 can be quickly positioned and fixed.

Further, battery cell baffles 42 are arranged at the bottom inside the shell 5, five battery cell baffles 42 are arranged, and the bottom of the battery cell 1 is placed between the two battery cell baffles 42.

The utility model discloses a theory of operation and use flow: during the use, the user inserts first electric core 1 between first separation blade 6 and the second separation blade 7, then insert second electric core 1 between two second separation blades 7 again, put into third piece and fourth piece electric core 1 from a left side to the right side again in proper order, four electric cores 1 can be put into to heat-proof device 2 inside, FPC subassembly 3 installs on heat-proof device 2, then insert heat-proof device 2 in standing groove 4, when thermal runaway appeared in electric core 1, first separation blade 6 and second separation blade 7 separate the heat of electric core 1 and keep off between first separation blade 6 and second separation blade 7, the heat can not give off to the outside of shell 5 simultaneously, the outside device of shell 5 has been protected.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a lithium cell thermal runaway protector which characterized in that: the heat insulation device comprises a shell (5), wherein a placing groove (4) is formed in the shell (5), a heat insulation assembly is arranged in the placing groove (4), the heat insulation assembly comprises a heat insulation device (2), and an FPC assembly (3) is arranged at the top of the heat insulation device (2);

two first separation blades (6) are symmetrically installed on two sides of the bottom of the heat insulation device (2), and a second separation blade (7) is installed at one side position, close to the first separation blades (6), of the bottom of the heat insulation device (2).

2. The lithium battery thermal runaway protector of claim 1, wherein: one side of the second baffle sheet (7) is bonded with a mica paper board (9) through glue, one side of the mica paper board (9) is bonded with a ceramic felt board (10) through glue, and one side of the ceramic felt board (10) is bonded with a foam board (11) through glue.

3. The lithium battery thermal runaway protector of claim 1, wherein: mica sheets (8) are installed on one side of the first separation blade (6), and an electric core (1) is installed between the first separation blade (6) and the second separation blade (7).

4. The lithium battery thermal runaway protector of claim 1, wherein: slide rail (41) are installed to the inner wall of shell (5), slide (61) are installed to the outer wall of first separation blade (6), slide (61) are installed inside slide rail (41).

5. The lithium battery thermal runaway protector of claim 2, wherein: the second baffle sheet (7) is rectangular, a groove is formed in the surface of the second baffle sheet (7), and one side of the mica paper board (9) is clamped in the groove.

6. The lithium battery thermal runaway protector of claim 3, wherein: the battery cell baffle plates (42) are arranged at the bottom inside the shell (5), the battery cell baffle plates (42) are provided with five, and the bottom of the battery cell (1) is placed between the two battery cell baffle plates (42).