Battery module array comprising under-base bar

Patent metadata

Field	Value
Publication number	US-9978998-B2
Application number	US-201515106952-A
Country	US
Kind code	B2
Filing date	Apr 1, 2015
Priority date	Apr 3, 2014
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

Disclosed is a battery module array which has high space utilization and is easy to fabricate. The battery module array includes a plurality of battery modules, end plates, tension bars, a front sensing unit, a rear sensing unit, an under-base bar, a front cover, and a rear cover.

First claim

What is claimed is:

1. A battery module array, comprising:
a plurality of battery modules, each including two secondary battery cells, a module frame, and a cooling fin;
end plates located at both side surfaces of a battery module assembly in which the plurality of battery modules are assembled;
a u-shaped tension bar contacting an upper end of the battery module assembly and fixed to the end plates;
a front sensing unit including sensing bus bars electrically connected to electrode leads of the battery modules included in the battery module assembly, a terminal bus bar, and a housing, the front sensing unit being located at a front portion of the battery module assembly;
a rear sensing unit including sensing bus bars electrically connected to the electrode leads of the battery modules included in the battery module assembly, and a housing, the rear sensing unit being located at a rear portion of the battery module assembly;
at least one under-base bar located at a lower end of the battery module assembly and fixed to the end plates;
a front cover configured to keep the front portion of the battery module assembly from being exposed to outside; and
a rear cover configured to keep the rear portion of the battery module assembly from being exposed to outside.

2. The battery module array according to claim 1 , wherein the battery module array includes two under-base bars, and
the two under-base bars are:
a first under-base bar located at a front lower end of the battery module assembly; and
a second under-base bar located at a rear lower end of the battery module assembly, respectively.

3. The battery module array according to claim 1 , wherein the end plates and the under-base bars are fixed by bolts.

4. The battery module array according to claim 1 , wherein the module frame has a rectangular frame shape, has a slit formed in a lower surface thereof to allow the cooling fin to be inserted therethrough, and is interposed between the two secondary battery cells.

5. The battery module array according to claim 1 , wherein the battery module array further includes an insulating sheet interposed between the battery module assembly and the end plates.

6. The battery module array according to claim 5 , wherein the insulating sheet is made of ethylene propylene diene monomer (EPDM) rubber.

7. The battery module array according to claim 1 , wherein the u-shaped tension bar is provided in plurality as two u-shaped tension bars arranged in parallel,
the end plates have grooves with threads formed therein,
the u-shaped tension bars have grooves formed at locations corresponding to the grooves of the end plates, and
the end plates and the u-shaped tension bars are fixed by a bolt.

8. The battery module array according to claim 1 , wherein the front sensing unit as well as the rear sensing unit includes a connector connectible with an external device.

9. The battery module array according to claim 1 , wherein the front cover includes an electrode terminal electrically connected with the terminal bus bar, and
the electrode terminal is exposed to an outer surface of the front cover.

10. A battery pack, comprising:
a battery module array defined in claim 1 ; and
a battery protection circuit.

11. A battery-driven system, comprising:
a battery pack as defined in claim 10 ; and
a load supplied with power from the battery pack.

12. The battery-driven system according to claim 11 , wherein the load is an electrically-driven means or a portable device.

Assignees

• Lg Chemical Ltd

Inventors

• Choi Jong Woon
• Kang Dal-Mo

Classifications

• H01M10/0481 Primary

  Compression means other than compression means for stacks of electrodes and separators · CPC title

• H01M10/482

  for several batteries or cells simultaneously or sequentially · CPC title

• H01M50/291

  characterised by their shape · CPC title

• H01M50/507

  comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules · CPC title

• H01M50/262

  with fastening means, e.g. locks · CPC title