CN217035845U

CN217035845U - Soft packet of lithium cell module of lightweight

Info

Publication number: CN217035845U
Application number: CN202123007542.6U
Authority: CN
Inventors: 王夏丹; 陆晓安; 尹发青; 高灵雷
Original assignee: Shanghai Guoxuan New Energy Co Ltd
Current assignee: Shanghai Guoxuan New Energy Co Ltd
Priority date: 2021-12-01
Filing date: 2021-12-01
Publication date: 2022-07-22
Anticipated expiration: 2031-12-01

Abstract

The utility model discloses a light soft package lithium battery module, which comprises a lower shell, an upper cover and a plurality of battery cell groups, wherein the lower shell comprises a bottom plate and four side plates connected to the bottom plate, the four side plates form a rectangular frame structure, the internal corners of two adjacent side plates are welded and fixed by C-shaped angle steel, and hollow holes are formed in the bottom plate and the side plates of the upper cover and the lower shell; a plurality of electric core groups are arranged in the lower shell, and the upper cover is welded at the top end of the lower shell. The utility model has simple structure, not only adopts light weight design, but also has stable strength and rigidity of the whole structure.

Description

Soft packet of lithium cell module of lightweight

Technical Field

The utility model relates to the technical field of soft package lithium battery modules, in particular to a light-weight soft package lithium battery module.

Background

In order to respond to the call of energy-saving and emission-reducing policies, the electric vehicle is more and more popular, the improvement of the endurance mileage of the electric vehicle becomes more and more important, and for the electric vehicle, when the system energy of the electric vehicle is not changed, the reduction of the system weight can effectively improve the endurance mileage, and can also effectively reduce the charging times of the lithium battery so as to prolong the service life of the lithium battery, so that the light weight design of the lithium battery pack is urgent.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a light-weight soft package lithium battery module which is stable in structure and light in weight, and the service life of the soft package lithium battery module is prolonged.

The technical scheme of the utility model is as follows:

a light soft package lithium battery module comprises a lower shell, an upper cover and a plurality of battery cell groups, wherein the lower shell comprises a bottom plate and four side plates connected to the bottom plate, the four side plates form a rectangular frame structure, the internal corners of every two adjacent side plates are welded and fixed through C-shaped angle steel, so that the four side plates are welded and fixed, and hollow holes are formed in the bottom plate and the side plates of the upper cover and the lower shell; a plurality of electric core groups set up in the inferior valve, and the upper cover welds the top at the inferior valve.

Preferably, the electric core groups are arranged in the lower shell side by side.

Preferably, the outer sides of the lugs at the two ends of the plurality of electric core groups are respectively provided with a lug support, and the outer side of each lug support is provided with an insulation protection cover plate.

Preferably, the upper cover is of a C-shaped structure, two downward extending vertical parts of the upper cover are parallel to the tab support, the two downward extending vertical parts of the upper cover correspond to the two lower side plates of the lower shell up and down, the bottom ends of the two vertical parts of the upper cover and the top ends of the two lower side plates of the lower shell are provided with tab plates which correspond to each other in an up-down manner and are superposed, the tab plates on the upper cover and the tab plates on the lower shell are fixedly connected through bolts, and the two side edges of the horizontal part of the upper cover, which are not connected with the vertical parts of the horizontal part of the upper cover, correspond to the top ends of the other two side plates of the lower shell one by one and are welded and fixed.

Preferably, the four side plates of the lower case are thermally pressed with insulating films on the inner walls thereof.

Preferably, the horizontal part of the upper cover and the bottom plate of the lower shell are both provided with hollow holes shaped like Chinese characters 'mi'.

Preferably, the four side plates of the lower shell are provided with weight-reducing hollowed-out holes which are arranged in a matrix.

Preferably, in the plurality of electric core groups arranged side by side, a superposed aerogel plate and a foam plate are arranged between two adjacent electric core groups, and the superposed aerogel plate and the foam plate, the aerogel plate and the adjacent electric core group, and the foam plate and the adjacent electric core group are all fixedly bonded.

Preferably, each of the battery cell groups is composed of a plurality of single battery cells which are arranged side by side and are bonded with each other.

Preferably, the top ends of the plurality of electric core groups are fixedly bonded with the upper cover, and the bottom ends of the plurality of electric core groups are fixedly bonded with the bottom plate of the lower shell by adopting heat-conducting structural adhesive.

The utility model has the advantages that:

the lower shell and the upper cover are both provided with the hollow holes, and the lower shell omits a traditional casting end plate structure, so that the weight of the soft package lithium battery module is reduced; the corners of the four side plates of the lower shell are welded by C-shaped angle steel to limit the expansion of the electric core group. In order to realize better insulating property, an insulating protective cover plate is arranged on the outer side of the lug support so as to meet the insulating requirement of electric devices such as copper bars and the like; aerogel and foam cotton are arranged between the cell groups, the aerogel is used for thermal runaway protection, and the foam cotton is used for absorbing the cell expansive force; the upper cover and the lower cover are connected by welding, and are connected by bolts by adopting the lug plate structure, so that the stability of the connecting structure is ensured, and the strength and the rigidity of the integral structure are improved. The utility model realizes the purpose of secondary insulation by uniformly pressing the insulating films on the inner walls of the four side plates of the lower shell.

Drawings

Fig. 1 is an exploded view of the present invention.

Reference numerals: 1-lower shell, 2-upper cover, 3-electric core group, 4-tab support, 5-insulating protective cover plate, 6-C type angle steel, 7-aerogel plate, 8-foam plate, 9-ear plate, 10-meter type hollowed-out hole and 11-weight-reducing hollowed-out hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1, a light soft package lithium battery module comprises a lower shell 1, an upper cover 2, a plurality of electric core groups 3 arranged side by side, two tab brackets 4 and two insulation protection cover plates 5, wherein the lower shell 1 comprises a bottom plate and four side plates connected to the bottom plate, the four side plates form a rectangular frame structure, and the internal corners of the two adjacent side plates are welded and fixed by C-shaped angle steel 6, so that the four side plates are welded and fixed, and an insulation film is uniformly pressed on the inner walls of the four side plates;

the multiple cell groups 3 are arranged in the lower shell 1, the bottoms of the multiple cell groups 3 are bonded and fixed with the bottom plate of the lower shell 1 by adopting heat-conducting structural adhesive, each cell group 3 consists of multiple single cells which are arranged side by side and bonded with each other, the outer sides of the lugs at the two ends of each cell group are respectively provided with a lug support 4, and the outer side of each lug support 4 is provided with an insulating protective cover plate 5; in the plurality of electric core groups 3 arranged side by side, a superposed aerogel plate 7 and a foam plate 8 are arranged between two adjacent electric core groups 3, and the superposed aerogel plate 7 and the foam plate 8, the aerogel plate 7 and the adjacent electric core groups 3 and the foam plate 8 and the adjacent electric core groups 3 are all bonded and fixed;

the upper cover 2 is of a C-shaped structure, two downward extending vertical parts of the upper cover 2 are parallel to the lug supports 4, the two downward extending vertical parts of the upper cover 2 correspond to two side plates of the lower shell 1 up and down, the bottom ends of the two vertical parts of the upper cover 2 and the top ends of the two side plates of the lower shell 1 are provided with lug plates 9 which are overlapped up and down correspondingly, the lug plates 9 on the upper cover 2 and the lug plates 9 on the lower shell 1 are fixedly connected through bolts, two side edges of the horizontal part of the upper cover 2, which are not connected with the vertical parts, correspond to the top ends of the other two side plates of the lower shell 1 one by one and are welded and fixed, and the top ends of the multiple electric core groups 3 are fixedly bonded with the horizontal part of the upper cover 2;

wherein, the horizontal part of the upper cover 2 and the bottom plate of the lower shell 1 are both provided with hollow holes 10 shaped like Chinese character 'mi', and four side plates of the lower shell 1 are both provided with lightening hollow holes 11 arranged in a matrix.

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 utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a soft packet of lithium cell module of lightweight, its characterized in that: the battery pack comprises a lower shell, an upper cover and a plurality of battery cell packs, wherein the lower shell comprises a bottom plate and four side plates connected to the bottom plate, the four side plates form a rectangular frame structure, the internal corners of every two adjacent side plates are welded and fixed by C-shaped angle steel, so that the four side plates are welded and fixed, and hollow holes are formed in the bottom plate and the side plates of the upper cover and the lower shell; a plurality of electric core groups set up in the inferior valve, and the upper cover welds the top at the inferior valve.

2. The soft packet of lithium battery module of lightweight of claim 1, characterized in that: the electric core groups are arranged in the lower shell side by side.

3. The soft packet of lithium battery module of lightweight of claim 1, characterized in that: the outside of the pole ear at the two ends of the plurality of electric core groups is respectively provided with a pole ear support, and the outside of each pole ear support is provided with an insulation protection cover plate.

4. The soft packet of lithium battery module of lightweight of claim 1, characterized in that: the upper cover be C type structure, two vertical portions of its downwardly extending all are on a parallel with utmost point ear support, two vertical portions of upper cover downwardly extending correspond from top to bottom with wherein two curb plates of inferior valve, the bottom of two vertical portions of upper cover and the top of wherein two curb plates of inferior valve are provided with the otic placode of upper and lower correspondence superpose, the otic placode on upper cover and the otic placode on the inferior valve pass through bolt fixed connection, two sides that the upper cover horizontal part is not connected rather than vertical portion correspond and welded fastening with two other curb plate top one-to-one of inferior valve.

5. The soft packet of lithium battery module of lightweight of claim 1, characterized in that: the inner walls of the four side plates of the lower shell are uniformly pressed with insulating films.

6. The soft packet of lithium battery module of lightweight of claim 4, characterized in that: the horizontal part of the upper cover and the bottom plate of the lower shell are both provided with hollow holes shaped like Chinese characters 'mi'.

7. The soft packet of lithium battery module of lightweight of claim 6, characterized in that: and the four side plates of the lower shell are provided with weight-reducing hollowed-out holes which are arranged in a matrix.

8. The soft packet of lithium battery module of lightweight of claim 2, characterized in that: in the plurality of electric core groups, superposed aerogel plates and foam plates are arranged between two adjacent electric core groups, and the superposed aerogel plates and the foam plates, the aerogel plates and the adjacent electric core groups and the foam plates and the adjacent electric core groups are fixedly bonded.

9. The soft packet of lithium battery module of lightweight of claim 1, characterized in that: each battery cell group is composed of a plurality of single battery cells which are arranged side by side and are mutually bonded.

10. The soft packet of lithium battery module of lightweight of claim 1, characterized in that: the top of a plurality of electric core groups all bond fixedly with the upper cover, the bottom of a plurality of electric core groups all adopts heat conduction structure to glue and the bottom plate bonding of inferior valve is fixed.