Battery module case and battery module comprising the same

Patent metadata

Field	Value
Publication number	US-11264654-B2
Application number	US-201816488389-A
Country	US
Kind code	B2
Filing date	Jul 9, 2018
Priority date	Jul 10, 2017
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

The present application can provide a battery module case applicable to an automation process, a battery module comprising the same, a battery pack comprising such a battery module and an automobile comprising such a battery module or pack. The present application can provide a battery module at low cost by applying an automation process.

First claim

The invention claimed is:

1. A battery module case, comprising:
a bottom plate and a sidewall, the bottom plate and the sidewall together forming an inner space configured to receive a resin layer and a plurality of battery cells;
a control hole and an injection hole formed in the bottom plate or the sidewall; and
a light transmissive film located on the control hole, wherein the light transmissive film comprises a base material and an adhesive layer formed on the base material,
wherein the light transmissive film is located on the control hole, and the light transmissive film is not located on the injection hole.

2. The battery module case according to claim 1 , wherein the injection hole is configured to receive an injection of a resin composition therethrough, and wherein the battery module case further comprises the resin layer, the resin layer being formed from the resin composition.

3. The battery module case according to claim 1 , wherein the bottom plate or the sidewall has a thermally conductive region at a portion thereof, the thermally conductive region being in contact with the resin layer.

4. The battery module case according to claim 1 , wherein the control hole is formed in the bottom plate.

5. The battery module case according to claim 1 , wherein a position of the control hole satisfies Equation 1 below:
1/50≤ P=B/L≤ 1/2   [Equation 1]

wherein, P represents the position of the control hole formed in the bottom plate or the sidewall, L represents a total length of the bottom plate or the sidewall measured from one end surface of the bottom plate or the sidewall to an opposite end surface, and B represents a distance from the one end surface to the control hole.

6. The battery module case according to claim 1 , wherein the control hole is one of a plurality of control holes, and the light transmissive film is formed extending along a direction in which the plurality of control holes are arranged.

7. The battery module case according to claim 1 , wherein the adhesive layer is disposed only in a partial region of the base material and not in a remaining region of the base material.

8. The battery module case according to claim 7 , wherein the partial region of the base material in which the adhesive layer is disposed and the remaining region of the base material in which the adhesive layer is not disposed are bent relative to one another at a predetermined angle, and the partial region of the base material and the remaining region of the base material have different optical characteristics.

9. The battery module case according to claim 1 , wherein all of the base material or the partial region of the base material comprises an absorbent component that is configured to absorb light of any wavelength.

10. The battery module case according to claim 1 , wherein an antireflection film is disposed on the all of the base material or the partial region of the base material.

11. A battery module, comprising:
a battery module case including a bottom plate and a sidewall, the bottom plate and the sidewall together forming an inner space,
a control hole and an injection hole formed in the bottom plate or the sidewall;
a light transmissive film located on the control hole;
a plurality of battery cells disposed in the inner space of the battery module case; and
a resin layer disposed in the inner space of the battery module case,
wherein the resin layer is in contact with at least one of the plurality of battery cells and the bottom plate or the sidewall,
wherein the light transmissive film is distinct from the resin layer, and
wherein the light transmissive film is located on the control hole, and the light transmissive film is not located on the injection hole.

12. The battery module according to claim 11 , wherein the injection hole is configured to receive injection of a resin composition therethrough, the resin layer being formed from the resin composition.

13. The battery module according to claim 11 , wherein the light transmissive film comprises a base material and an adhesive layer formed on the base material.

14. The battery module according to claim 11 , wherein a surface of at least one of the battery cells comprises an absorbent component that is configured to absorb light of any wavelength.

15. The battery module according to claim 11 , wherein the resin layer has thermal conductivity of 1.5 W/mK or more.

16. The battery module according to claim 11 , wherein the resin layer comprises a filler.

17. A battery pack comprising two or more battery modules each according to claim 11 , the battery modules being electrically connected to each other.

18. An automobile comprising the battery module according to claim 11 .

19. An automobile comprising the battery pack of claim 17 .

Assignees

• Lg Chemical Ltd

Inventors

• Park Eun Suk
• Yang Se Woo
• Cho Yoon Gyung
• Kang Yang Gu
• Kim Hyun Suk
• Park Hyoung Sook
• Park Sang Min
• Yang Young Jo

Classifications

• H01M10/482 Primary

  for several batteries or cells simultaneously or sequentially · CPC title

• H01M10/488 Primary

  Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density · CPC title

• H01M50/227

  Organic material · CPC title

• H01M50/211

  adapted for pouch cells · CPC title

• H01M50/233

  characterised by physical properties of casings or racks, e.g. dimensions · CPC title