Encasement for a battery cell and for a battery system, process for producing said encasement, battery cell and battery system

Patent metadata

Field	Value
Publication number	US-9647247-B2
Application number	US-201514800009-A
Country	US
Kind code	B2
Filing date	Jul 15, 2015
Priority date	Jul 15, 2014
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

An encasement ( 20 ) for a battery cell ( 2 ) and for a battery system ( 1 ) wherein said encasement is in the form of a sheet and comprises a core layer ( 22 ). This core layer ( 22 ) comprises carbon nanotubes. The invention further relates to a process for producing an encasement ( 20 ) which comprises initially coating a polymer substrate with an oxide material and applying carbon nanotubes to an oxide layer thus formed.

First claim

What is claimed is:

1. A battery cell ( 2 ) comprising a cell housing ( 3 ) and at least one encasement ( 20 ) surrounding the cell housing ( 3 ), the encasement being in the form of a sheet comprising a core layer ( 22 ) and at least one covering layer ( 24 , 26 ) applied to the core layer ( 22 ), wherein the core layer ( 22 ) comprises carbon nanotubes, and wherein the at least one covering layer ( 24 , 26 ) does not include carbon nanotubes.

2. The battery cell ( 2 ) according to claim 1 , characterized in that the core layer ( 22 ) comprises an oxide material.

3. The battery cell ( 2 ) according to claim 2 , wherein the core layer ( 22 ) comprises the oxide material and the carbon nanotubes in a ratio from 1:1 to 5:1.

4. The battery cell ( 2 ) according to claim 1 , characterized in that the core layer ( 22 ) comprises a polymer substrate.

5. The battery cell ( 2 ) according to claim 1 , characterized in that the at least one covering layer ( 24 , 26 ) is a polymer sheet.

6. The battery cell ( 2 ) according to claim 1 , wherein the at least one covering layer ( 24 ) is applied to one side of the core layer ( 22 ) and a second covering layer ( 26 ) is applied to an opposite side of the core layer ( 22 ).

7. The battery cell ( 2 ) according to claim 6 , wherein the at least one covering layer ( 24 ) is a polymer sheet.

8. The battery cell ( 2 ) according to claim 7 , wherein the second covering layer ( 26 ) is a polymer sheet.

9. The battery cell ( 2 ) according to claim 1 , wherein the cell housing ( 3 ) includes at least two electrodes electrically connected to the battery cell ( 2 ).

10. The battery cell ( 2 ) according to claim 1 , wherein the cell housing ( 3 ) is cuboid shaped.

11. A process for producing an encasement ( 20 ) for a battery cell ( 2 ) according to claim 1 , the process comprising initially coating a polymer substrate with an oxide material and applying carbon nanotubes to an oxide layer thus formed.

12. The process according to claim 11 , further comprising heating the oxide material-coated polymer substrate before application of the carbon nanotubes.

13. The process according to claim 11 , further comprising dispersing the carbon nanotubes in a solution before application to the oxide layer and applying the solution comprising the carbon nanotubes to the oxide layer.

14. The process according to claim 11 , further comprising forming the oxide layer to a thickness of 1 micrometer to 10 micrometers.

Assignees

• Bosch Gmbh Robert

Inventors

• Fink Holger
• Fetzer Joachim
• Wöhrle Thomas
• Hore Sarmimala

Classifications

• H01M50/229

  Composite material consisting of a mixture of organic and inorganic materials · CPC title

• H01M50/222

  Inorganic material · CPC title

• H01M50/231

  having a layered structure · CPC title

• H01M50/227

  Organic material · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title