CN216085100U

CN216085100U - Sheet-shaped battery module and multilayer battery module

Info

Publication number: CN216085100U
Application number: CN202122021384.3U
Authority: CN
Inventors: 马训振; 闫毅; 付垚; 李永伟
Original assignee: Beijing WeLion New Energy Technology Co ltd
Current assignee: Beijing WeLion New Energy Technology Co ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2022-03-18
Anticipated expiration: 2031-08-25

Abstract

The utility model relates to the technical field of batteries, and discloses a sheet-shaped battery module which comprises a shell, a plurality of first soft-package battery cells and a plurality of second soft-package battery cells, wherein an upper installation layer and a lower installation layer which are respectively used for installing the first soft-package battery cells and the second soft-package battery cells are arranged in the shell, the first soft-package battery cells are distributed along the left and right directions in a positive-negative alternate mode, the second soft-package battery cells are distributed along the left and right directions in a positive-negative alternate mode, and the positive electrode/negative electrode of each first soft-package battery cell is electrically connected with the negative electrode/positive electrode of the adjacent second soft-package battery cell. The utility model also discloses a multilayer battery module which comprises a plurality of sheet-shaped battery modules, wherein a gap is formed between every two adjacent sheet-shaped battery modules, so that the temperature influence between the battery modules can be reduced, and the service life of the multilayer battery module is prolonged.

Description

Sheet-shaped battery module and multilayer battery module

Technical Field

The utility model relates to the technical field of batteries, in particular to a sheet-shaped battery module and a multilayer battery module.

Background

In recent years, with the continuous development of the battery industry, lithium ion batteries are widely used in the fields of electric vehicles, energy storage and the like due to the advantages of high energy density, recyclability, long service life and the like. Lithium battery module among the prior art piles up into massive structure with a plurality of laminate polymer core, and the battery module heat dispersion of this kind of structure is relatively poor, and the inside temperature of battery module is higher than marginal temperature, and temperature field distribution is inhomogeneous, leads to a plurality of laminate polymer core's life uneven, seriously influences the life of battery module.

SUMMERY OF THE UTILITY MODEL

In view of the above technical problems in the prior art, the present invention provides a sheet-shaped battery module, which can improve the heat dissipation performance and prolong the service life of the battery module.

The technical scheme adopted for solving the technical problems of the sheet-shaped battery module is as follows: a sheet-shaped battery module, comprising: a housing having an upper mounting layer and a lower mounting layer inside; the first soft-package battery cells are arranged in the upper installation layer, the tabs of the first soft-package battery cells are downward, and the first soft-package battery cells are distributed along the left and right directions in a mode that the positive electrode and the negative electrode are alternated; the second soft-package battery cells are arranged in the lower installation layer, the tabs of the second soft-package battery cells are upward, and the second soft-package battery cells are distributed along the left and right directions in a mode that the positive electrode and the negative electrode are alternated; and the positive electrode/negative electrode of the first soft-package battery cell is electrically connected with the adjacent negative electrode/positive electrode of the second soft-package battery cell.

Foretell sheet battery module, go up the mounting layer with be provided with first insulating strip and second insulating strip down between the mounting layer, the utmost point ear of first laminate polymer core with the utmost point ear of second laminate polymer core all is located first insulating strip with between the second insulating strip.

The shell comprises a front cover and a rear cover which are mutually covered and connected, and the first insulating strip and the second insulating strip are respectively arranged on the front cover and the rear cover.

In the sheet-shaped battery module, the front cover is bonded with the rear cover.

The sheet-shaped battery module is characterized in that the number of the first soft-package battery cells is not equal to that of the second soft-package battery cells.

In the sheet-shaped battery module, the housing is made of an aluminum material.

Foretell slice battery module, first laminate polymer battery core with second laminate polymer battery core all through electrically conductive adhesive bonding in the inner wall of casing.

The sheet-shaped battery module disclosed by the utility model at least has the following beneficial effects: this battery module sets up to the lamellar structure, can carry out the face dispersion with the temperature of battery module, effectively solves the inside inconsistent problem of heat and the heat dissipation of building of battery module, guarantees that every first laminate polymer core and second laminate polymer core all are in normal operating temperature within range, improves the heat dispersion and the life of battery module.

The utility model also provides a multilayer battery module which comprises a plurality of the sheet-shaped battery modules, wherein the plurality of sheet-shaped battery modules are distributed along the front and back direction, and a gap is reserved between every two adjacent sheet-shaped battery modules and the adjacent sheet-shaped battery modules are electrically connected with each other.

The multilayer battery module is characterized in that a first through hole is formed in the lug of the first soft package battery cell and a first through hole is formed in the lug of the second soft package battery cell, a second through hole is formed in the shell, the first through hole is aligned with the second through hole, and a current leading-out body is inserted into the first through hole and the second through hole.

The multilayer battery module of the utility model has at least the following beneficial effects: this multilayer battery module comprises a plurality of slice battery modules, the heat dispersion of slice battery module is higher, and all remain gapped between every two adjacent slice battery modules, can reduce the temperature influence between each battery module, improve multilayer battery module's life, after single battery module appears the inside short circuit scheduling problem, can reduce the scope of thermal runaway, and can cut off the electric connection relation between the battery module that goes wrong and other battery modules, thereby can avoid the aggravation out of control, reduce the potential safety hazard, reduce the loss.

Drawings

The utility model will be further described with reference to the following figures and examples, in which:

fig. 1 is an exploded view of a sheet-shaped battery module according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a multi-layered battery module according to an embodiment of the present invention.

In the drawings: 100 shells, 110 upper mounting layers, 120 lower mounting layers, 130 first insulating strips, 140 second insulating strips, 150 front covers, 160 rear covers, 170 second through holes, 200 first soft-package battery cells, 300 second soft-package battery cells, 400 tabs, 500 current lead-out bodies and 600 gaps.

Detailed Description

Describing an embodiment of the present invention in detail, referring to fig. 1, the embodiment of the present invention provides a sheet-shaped battery module, including a casing 100, a plurality of first soft-package cells 200, and a plurality of second soft-package cells 300, wherein the casing 100 has an upper installation layer 110 and a lower installation layer 120 for installing the first soft-package cells 200 and the second soft-package cells 300, respectively; the tab 400 of the first soft-package battery cell 200 faces downward, and the plurality of first soft-package battery cells 200 are distributed along the left and right directions in a manner that the positive electrode and the negative electrode are alternated; the tabs 400 of the second soft-package cells 300 face upward, and the plurality of second soft-package cells 300 are distributed along the left and right directions in a manner that the positive electrode and the negative electrode are alternated; the positive electrode/negative electrode of the first soft-package battery cell 200 is electrically connected to the negative electrode/positive electrode of the second soft-package battery cell 300 adjacent to the positive electrode/negative electrode.

This battery module is installed first laminate polymer battery cell 200 and second laminate polymer battery cell 300 in casing 100 inside last installing layer 110 and lower installing layer 120 respectively, make the battery module be the slice, can be applicable to the consumer of flat structures such as flat board, can increase the heat radiating area of battery module, compare with piling up into massive battery module, this battery module can effectively solve the inside inconsistent problem of heat and heat dissipation of building up of battery module, guarantee that every first laminate polymer battery cell 200 and second laminate polymer battery cell 300 all are in normal operating temperature within range, improve the heat dispersion and the life of battery module.

Further, the quantity of first soft-packaged electrical core 200 and the quantity inequality of second soft-packaged electrical core 300, in this embodiment, the quantity of first soft-packaged electrical core 200 is less than one of the quantity of second soft-packaged electrical core 300, to second soft-packaged electrical core 300, the positive pole of leftmost second soft-packaged electrical core 300 and the negative pole of rightmost second soft-packaged electrical core 300 all are in and treat the connection state, or the negative pole of leftmost second soft-packaged electrical core 300 and the positive pole of rightmost second soft-packaged electrical core 300 all are in and treat the connection state, and all positive poles and the negative pole of first soft-packaged electrical core 200 all are connected with second soft-packaged electrical core 300. Specifically, in this embodiment, the first soft-package battery cell 200 is provided with two, and the second soft-package battery cell 300 is provided with three.

Further, a first insulating strip 130 and a second insulating strip 140 are arranged between the upper mounting layer 110 and the lower mounting layer 120, the tab 400 of the first soft-package battery cell 200 and the tab 400 of the second soft-package battery cell 300 are both located between the first insulating strip 130 and the second insulating strip 140, so as to isolate the tabs 400, thereby preventing mutual influence between the tabs 400, specifically, the casing 100 includes a front cover 150 and a rear cover 160 which are mutually covered and connected, the first insulating strip 130 and the second insulating strip 140 are respectively installed on the front cover 150 and the rear cover 160, during installation, the first insulating strip 130 is installed on the front cover 150, then the first soft-package battery cell 200 and the second soft-package battery cell 300 are installed, and the tab 400 of the second soft-package battery cell 300 is electrically connected with the tab 400 of the second soft-package battery cell 300, then the rear cover 160 with the second insulating strip 140 is covered and connected to the front cover 150, and assembly is convenient and fast.

Specifically, the front cover 150 is bonded to the rear cover 160, and the structures of the front cover 150 and the rear cover 160 can be simplified, but of course, the glue used to bond the front cover 150 to the rear cover 160 should be a substance having high heat resistance. Specifically, the first and

second insulating strips

130 and 140 are made of ABS material/PP material/SMC material or other insulating materials. Specifically, first soft-packaged electrical core 200 and second soft-packaged electrical core 300 all connect in the inner wall of casing 100 through electrically conductive glue, need not additionally to set up mounting structure in casing 100, can simplify casing 100's structural design, also can reduce casing 100's volume simultaneously. Specifically, the housing 100 is made of an aluminum material.

Referring to fig. 2, an embodiment of the present invention further provides a multi-layered battery module, which includes a plurality of the above-mentioned sheet-shaped battery modules, the plurality of sheet-shaped battery modules are distributed along a front-back direction, a gap 600 is reserved between every two adjacent sheet-shaped battery modules and electrically connected to each other, the battery module can change the existing connection mode of "parallel connection and series connection", can perform series connection or series-parallel connection according to actual requirements, and the heat dissipation performance of the sheet-shaped battery modules is high, and a gap 600 is reserved between every two adjacent sheet-shaped battery modules, which can reduce the temperature influence between each battery module, improve the service life of the multi-layered battery module, and after a single battery module has problems such as internal short circuit, can reduce the thermal runaway range, and can cut off the electrical connection relationship between the battery module having problems and other battery modules, thereby avoiding aggravating runaway, the potential safety hazard is reduced, and the loss is reduced. Specifically, in the present embodiment, three sheet-shaped battery modules are used for electrical connection.

Further, first through-hole has all been seted up to utmost point ear 400 of first laminate polymer battery cell 200 and the utmost point ear 400 of second laminate polymer battery cell 300, has seted up second through-hole 170 on the casing 100, and first through-hole and second through-hole 170 align, and it has electric current to draw forth body 500 to peg graft in first through-hole and the second through-hole 170, draws forth body 500 through electric current and makes a plurality of slice battery module parallel connection. Specifically, a cooling/heating pipeline can be added in the gap 600 between every two adjacent sheet-shaped battery modules, the cooling or heating medium can be gas or liquid and plays a role in heating or cooling and heat dissipation, and the mutual influence between the battery modules can be avoided due to the multi-layer structural design. Specifically, the current extractor 500 may be made of a fuse-like material.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, 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, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, 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 otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A sheet-shaped battery module, characterized by comprising:

a housing (100), the housing (100) having an upper mounting layer (110) and a lower mounting layer (120) therein;

the first soft-package battery cells (200) are mounted in the upper mounting layer (110), tabs (400) of the first soft-package battery cells (200) face downwards, and the first soft-package battery cells (200) are distributed in the left-right direction in a positive-negative alternate mode;

the second soft-package battery cells (300) are mounted in the lower mounting layer (120), tabs (400) of the second soft-package battery cells (300) face upwards, and the second soft-package battery cells (300) are distributed in the left-right direction in a positive-negative electrode alternate mode;

and the positive electrode/negative electrode of the first soft-package battery cell (200) is electrically connected with the adjacent negative electrode/positive electrode of the second soft-package battery cell (300).

2. The sheet-shaped battery module according to claim 1, wherein a first insulating strip (130) and a second insulating strip (140) are arranged between the upper mounting layer (110) and the lower mounting layer (120), and the tab (400) of the first soft pack cell (200) and the tab (400) of the second soft pack cell (300) are both located between the first insulating strip (130) and the second insulating strip (140).

3. The sheet-type battery module according to claim 2, wherein the housing (100) comprises a front cover (150) and a rear cover (160) which are coupled to each other in a covering manner, and the first insulating strip (130) and the second insulating strip (140) are mounted to the front cover (150) and the rear cover (160), respectively.

4. The sheet-type battery module according to claim 3, wherein the front cover (150) is bonded to the rear cover (160).

5. The sheet-shaped battery module according to claim 1, characterized in that the number of first pouch cells (200) is not equal to the number of second pouch cells (300).

6. The sheet-type battery module according to claim 1, characterized in that the housing (100) is made of an aluminum material.

7. The sheet-shaped battery module according to claim 1, characterized in that the first pouch cell (200) and the second pouch cell (300) are both bonded to the inner wall of the housing (100) by means of an electrically conductive glue.

8. A multi-layered battery module comprising a plurality of the sheet-type battery modules according to any one of claims 1 to 7, the plurality of sheet-type battery modules being arranged in a front-rear direction, and a gap (600) being left between every two adjacent sheet-type battery modules and being electrically connected to each other.

9. The multi-layer battery module according to claim 8, wherein the tab (400) of the first pouch cell (200) and the tab (400) of the second pouch cell (300) are both provided with a first through hole, the housing (100) is provided with a second through hole (170), the first through hole and the second through hole (170) are aligned, and a current extractor (500) is inserted into the first through hole and the second through hole (170).