CN210040325U

CN210040325U - Square lithium ion battery shell

Info

Publication number: CN210040325U
Application number: CN201921111673.9U
Authority: CN
Inventors: 陈刚; 马卫; 张天赐; 陈中华; 孙伟兵; 华诚; 杨梢; 王宇; 梁根兴; 江长清
Original assignee: Hubei Lithium Nuo Amperex Technology Ltd
Current assignee: Hubei Lithium Nuo Amperex Technology Ltd
Priority date: 2019-07-16
Filing date: 2019-07-16
Publication date: 2020-02-07
Anticipated expiration: 2029-07-16

Abstract

The utility model discloses a square lithium ion battery shell, which comprises a square aluminum alloy box body and a cover plate; through holes are respectively formed in two groups of symmetrical panels of the square aluminum alloy box body, plastic plates are embedded into the through holes, and the inner surface and the outer surface of each plastic plate are flush with the inner surface and the outer surface of each panel respectively. The aluminum alloy box body is embedded into the plastic plate, so that the strength of the box body is guaranteed, the whole weight of the panel is reduced due to the fact that the density of the plastic plate is small, and the requirement for lightening the shell of the lithium ion battery is met.

Description

Square lithium ion battery shell

Technical Field

The utility model belongs to the technical field of lithium ion battery, concretely relates to square lithium ion battery shell.

Background

The problem of energy exhaustion is caused by serious environmental pollution caused by using a large amount of fossil fuel. Nowadays, people are actively developing and utilizing renewable clean energy lithium ion batteries, which have the advantages of high specific energy, no memory effect, high working voltage, safety, long service life and good cycle performance, and are efficient secondary batteries with the greatest development prospect and chemical energy storage power sources with the fastest development. Meanwhile, the research and development of high-efficiency lithium ion batteries with higher energy density, higher power density, longer cycle life and higher safety are the strategic targets of the scientific and technical development of the world high-performance secondary batteries.

Energy density is an important index of the lithium ion battery, and the square lithium ion battery generally adopts an aluminum alloy material as a shell of the lithium ion battery, and the weight of the metal shell also greatly influences the energy density of the lithium ion battery.

Disclosure of Invention

The utility model aims at providing a square lithium ion battery shell that accords with the lightweight requirement to the not enough of above-mentioned technique.

In order to achieve the purpose, the square lithium ion battery shell comprises a square aluminum alloy box body and a cover plate; through holes are respectively formed in two groups of symmetrical panels of the square aluminum alloy box body, plastic plates are embedded into the through holes, and the inner surface and the outer surface of each plastic plate are flush with the inner surface and the outer surface of each panel respectively.

Furthermore, the part that the plastic board and panel through-hole combined together is provided with grabs glued structure.

Furthermore, the part where the plastic plate and the panel through hole are combined is provided with a semicircular glue grabbing structure.

Furthermore, the inner wall of the opening end of the square aluminum alloy box body is provided with a step for installing the cover plate.

Furthermore, at least two through holes are formed in the panel of the square aluminum alloy box body in the length direction, and every two adjacent through holes are not communicated.

Compared with the prior art, the utility model has the advantages of it is following: the utility model discloses square lithium ion battery shell adopts aluminum alloy box embedding plastic board, has both guaranteed the intensity of box, again because plastic board density is less the whole weight that has reduced the panel, has reached the requirement of lithium ion battery shell lightweight.

Drawings

Fig. 1 is a schematic diagram of the structure of a square lithium ion battery casing of the present invention;

fig. 2 is a schematic top view of fig. 1.

Wherein: square aluminum alloy box 1, plastic board 2, grab glued structure 3, top panel 4, lower panel 5, right panel 6, left panel 7, step 8.

Detailed Description

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

As shown in fig. 1 and 2, the square lithium ion battery case comprises a square aluminum alloy case body 1 and a cover plate (not shown in the figure), wherein two sets of symmetrical panels of the square aluminum alloy case body 1 are respectively provided with through holes, plastic plates 2 are embedded in the through holes, the inner and outer surfaces of the plastic plates 2 are respectively flush with the inner and outer surfaces of the panels, and the positions where the plastic plates 2 are combined with the panel through holes are provided with glue catching structures 3 (in the embodiment, the glue catching structures are semicircular glue catching structures) so as to increase the bonding strength between the plastic plates 2 and the square aluminum alloy case body 1. In addition, the inner wall of the opening end of the square aluminum alloy box body 1 is provided with a step 8 for installing a cover plate.

As shown in fig. 1, in this embodiment, the two sets of symmetric panels are an upper panel 4, a lower panel 5, a left panel 7 and a right panel 6, and when the surface area of the panels is large, for example, the upper panel 4 and the lower panel 5, in order to ensure the strength of the panels, at least two through holes are formed in the upper panel, and every two adjacent through holes are not communicated, and similarly, at least two through holes are also formed in the lower panel; in addition, the shape of the through hole can be square or any other shape, and the shape of the plastic plate 2 is consistent with the shape of the through hole.

The utility model discloses square lithium ion battery shell adopts aluminum alloy box embedding plastic board, has both guaranteed the intensity of box, again because plastic board density is less the whole weight that has reduced the panel, has reached the requirement of lithium ion battery shell lightweight.

Claims

1. A square lithium ion battery shell comprises a square aluminum alloy box body and a cover plate; the method is characterized in that: through holes are respectively formed in two groups of symmetrical panels of the square aluminum alloy box body, plastic plates are embedded into the through holes, and the inner surface and the outer surface of each plastic plate are flush with the inner surface and the outer surface of each panel respectively.

2. The prismatic lithium ion battery case of claim 1, wherein: and the plastic board is provided with a glue grabbing structure at the position combined with the panel through hole.

3. The prismatic lithium ion battery case of claim 1, wherein: and a semicircular glue grabbing structure is arranged at the position where the plastic plate is combined with the panel through hole.

4. The prismatic lithium ion battery case of claim 1, wherein: the inner wall of the opening end of the square aluminum alloy box body is provided with a step for installing the cover plate.

5. The prismatic lithium ion battery case of claim 1, wherein: at least two through holes are formed in the panel of the square aluminum alloy box body in the length direction, and every two adjacent through holes are not communicated.