CN217334269U

CN217334269U - Soft-package battery pack with buffer

Info

Publication number: CN217334269U
Application number: CN202122407631.3U
Authority: CN
Inventors: 范刘学; 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: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-08-30
Anticipated expiration: 2031-09-30

Abstract

A soft package battery pack with buffering comprises M battery cell units and N buffering units, wherein each battery cell unit comprises M battery cells, and foam cotton is clamped between every two adjacent battery cells; the single buffer unit is clamped between two adjacent battery cell units; each buffer unit comprises a first side clapboard, a second side clapboard and a middle clapboard clamped between the first side clapboard and the second side clapboard, and buffer parts are arranged between the first side clapboard and the middle clapboard and between the middle clapboard and the second side clapboard; wherein M, N and M are both natural numbers, and M is more than 1, N is more than 0, and M is more than 1. The utility model provides a soft-packaged battery group of area buffering separates electric core unit through setting up buffering unit for every group electric core unit pressure can not influence each other, and electric core atress is even, has prolonged the life of electric core.

Description

Soft-package battery pack with buffer

Technical Field

The utility model relates to an automobile power battery technical field, concretely relates to soft packet of group battery of area buffering.

Background

The soft package lithium ion battery has the advantages of high specific energy, high voltage platform, environmental protection, good safety performance, small internal resistance, light weight and the like, so the soft package lithium ion battery is popular in the field of electric vehicles.

Big module electric core of present soft package is in back in groups, because battery charge-discharge makes electric core inflation thickness change, and the big module electric core structure rigidity of soft package of conventional module is great, leads to the inside atress of battery inhomogeneous, and influences each other, leads to using later stage electric core uniformity relatively poor, leads to electric core life-span to reduce.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a soft-packaged battery group with buffering separates electric core unit through setting up buffering unit for every group electric core unit pressure can not influence each other, and electric core atress is even, has prolonged the life of electric core.

In order to solve the above problem, the utility model discloses the technical scheme who adopts as follows:

a soft package battery pack with buffering comprises M battery cell units, each battery cell unit comprises M battery cells, and foam cotton is clamped between every two adjacent battery cells; the single buffer unit is clamped between two adjacent battery cell units; each buffer unit comprises a first side clapboard, a second side clapboard and a middle clapboard clamped between the first side clapboard and the second side clapboard, and buffer parts are arranged between the first side clapboard and the middle clapboard and between the middle clapboard and the second side clapboard; wherein M, N and M are both natural numbers, and M is more than 1, N is more than 0, and M is more than 1.

Further, the soft-package battery pack with the buffer further comprises side baffles on two sides and end baffles at two ends, the side baffles are connected with the end baffles to form a square frame, the M battery cell units and the N buffer units are installed in the square frame, and the intermediate partition plate is fixedly connected with the side baffles on two sides.

Further, the middle partition plate is welded and fixed with the side baffles on the two sides.

Furthermore, the side baffle and the end baffle are welded to form a square frame.

Further, each of the cell units includes at least three cells.

Further, the buffer member is provided as an elastic member.

Further, the first side partition plate and between the middle partition plate, the middle partition plate and between the second side partition plate are provided with four buffering parts, and the four buffering parts are arranged at two opposite corners of two sides of the middle partition plate.

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

the utility model provides a soft-packaged battery group of area buffering, be provided with the buffering unit between two adjacent electric core units, separate every group electric core unit through the buffering unit, and be equipped with the bubble cotton between two adjacent electric cores in single electric core unit, make the battery when the charging and discharging inflation, lean on the cotton absorption expansion volume of inside bubble, there is the buffering unit both sides, it can not be too big to produce the cushioning effect and make every group electric core unit internal force, and isolated other electric cores are to the influence of this group electric core unit, thereby guarantee that electric core can not receive too big pressure, and every group electric core atress is comparatively even, the life of electric core has been prolonged.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic structural diagram of a soft pack battery pack with a buffer according to an embodiment of the present invention;

fig. 2 is the utility model discloses the laminate polymer battery group of area buffering does not weld a side baffle's structural schematic.

The reference numbers illustrate:

in the figure, 100-soft package battery pack with buffer, 10-cell unit, 11-cell, 12-foam, 20-buffer unit, 21-first side clapboard, 22-middle clapboard, 23-second side clapboard, 24-buffer piece, 31-first side baffle, 32-second side baffle, 33-first outer end baffle, 34-first inner end baffle, 35-second outer end baffle, 36-second inner end baffle, 37-buffer piece

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 and fig. 2, fig. 1 is the utility model discloses the laminate polymer battery group's of area buffering structural schematic diagram, fig. 2 is the utility model discloses the laminate polymer battery group of area buffering does not weld a side shield's structural schematic diagram.

The embodiment provides a laminate polymer battery pack 100 of area buffering, belongs to automobile power battery technical field, separates electric core unit 10 through setting up buffering unit 20 for every group electric core unit 10 pressure can not influence each other, and electric core atress is even, has prolonged the life of electric core.

Referring to fig. 1 and fig. 2, the buffered soft pack battery pack includes M battery cell units 10 and N buffer units 20, and further includes side baffles at two sides and end baffles at two ends; in the present embodiment, M is preferably 4, and N is preferably 3, but may be set to other natural number values satisfying M > 1 and N > 0.

Referring to fig. 2, each cell unit 10 includes m cells 11, foam 12 is sandwiched between two adjacent cells 11, and when the battery is expanded during charging and discharging, the foam 12 absorbs the expansion amount; in the present embodiment, m is preferably 5, but may be set to other natural number values satisfying m > 1.

Referring to fig. 2 again, a single buffer unit 20 is sandwiched between two adjacent cell units 10, and the buffer unit 20 generates a buffer effect so that the internal force of each group of cell units 10 is not too large, and the cells 11 of each group of cell units 10 are uniformly stressed.

With continued reference to fig. 2, each of the buffer units 20 includes a first side partition 21, a second side partition 23, and a middle partition 22 interposed therebetween, and buffer members 24 are disposed between the first side partition 21 and the middle partition 22, and between the middle partition 22 and the second side partition 23; the above-described structural arrangement forms the buffer unit 20.

In this embodiment, the buffering member 24 is preferably an elastic member to ensure a better buffering effect, and may specifically be a spring, but may also be another buffering structure.

Further preferably, four springs are arranged between the first side partition plate 21 and the middle partition plate 22 and between the middle partition plate 22 and the second side partition plate 23, the four springs are arranged at two opposite corners of two sides of the middle partition plate 22, and the position relationship forms a quadrangle, generally a square or a rectangle, so that the electric cores 11 of each group of electric core units 10 are uniformly stressed.

Referring specifically to fig. 1, in the present embodiment, the side baffles include a first side baffle 31 and a second side baffle 32, and the end baffles include a first outer end baffle 33 and a first inner end baffle 34, and a second outer end baffle 35 and a second inner end baffle 36.

Specifically, as shown in fig. 1, the first outer end face guard 33 is welded to the first side face guard 31 and the second side face guard 32, and similarly, the second outer end face guard 35 is welded to the first side face guard 31 and the second side face guard 32, the welded connection forming a square frame.

Further, the middle partition 22 of the buffer unit 20 is fixedly connected with the first side baffle 31 and the second side baffle 32 on two sides; the intermediate partition 22 is preferably welded to the first side barrier 31 and the second side barrier 32 on both sides.

The welding of the intermediate partition 22 to the square frame has the following advantages: cell unit 10 and buffer unit 20 are installed in above-mentioned square frame, separate every group cell unit 10 through buffer unit 20, and buffer unit 20's intermediate bottom 22 and square frame welded fastening guarantee that every group cell unit 10 pressure can not influence each other, completely cut off other cell units 10 promptly to this group cell unit 10's influence, the cushioning effect who adds buffer unit 20 makes every group cell unit 10 internal force can not be too big, has prolonged the life of electric core 11.

The utility model provides a take laminate polymer battery group 100 of buffering, be provided with buffer unit 20 between two adjacent electric core units 10, separate every group electric core unit 10 through buffer unit 20, and be equipped with between two adjacent electric core 11 in single electric core unit 10 and steep cotton 12, make the battery when the charging and discharging inflation, lean on the cotton 12 absorbed expansion volume of inside bubble, there is buffer unit 20 both sides, it can not be too big to produce the cushioning effect and make every group electric core unit 10 internal force, and isolated other electric cores are to this group electric core unit 10's influence, thereby guarantee that electric core 11 can not receive too big pressure, and every group electric core 11 atress is comparatively even, the service life of electric core 11 has been prolonged.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. The utility model provides a laminate polymer battery group of area buffering which characterized in that: which comprises

The battery cell comprises M battery cell units, each battery cell unit comprises M battery cells, and foam cotton is clamped between every two adjacent battery cells;

the single buffer unit is clamped between two adjacent battery cell units;

each buffer unit comprises a first side partition plate, a second side partition plate and a middle partition plate clamped between the first side partition plate and the second side partition plate, and buffer parts are arranged between the first side partition plate and the middle partition plate and between the middle partition plate and the second side partition plate;

wherein M, N and M are both natural numbers, and M is more than 1, N is more than 0, and M is more than 1.

2. The cushioned pouch battery pack according to claim 1, wherein: the soft-package battery pack with the buffer further comprises side baffles on two sides and end baffles at two ends, the side baffles are connected with the end baffles to form a square frame, the M battery cell units and the N buffer units are installed in the square frame, and the intermediate partition plate is fixedly connected with the side baffles on two sides.

3. The cushioned pouch battery pack according to claim 2, wherein: the middle partition plate is welded and fixed with the side baffles on the two sides.

4. The cushioned pouch battery pack according to claim 3, wherein: the side baffle and the end baffle are welded to form a square frame.

5. The cushioned pouch battery pack according to claim 4, wherein: each of the cell units includes at least three cells.

6. The cushioned pouch battery pack as set forth in any one of claims 1-5, wherein: the buffer piece is arranged as an elastic piece.

7. The cushioned pouch battery pack of claim 6, wherein: first side baffle with between the intermediate bottom all be equipped with four bolster between the intermediate bottom with between the second side baffle, four the bolster sets up two diagonal positions of intermediate bottom's both sides.