Easier to assemble battery module including bus bar frame

Patent metadata

Field	Value
Publication number	US-11545727-B2
Application number	US-201916769484-A
Country	US
Kind code	B2
Filing date	Mar 6, 2019
Priority date	Mar 30, 2018
Publication date	Jan 3, 2023
Grant date	Jan 3, 2023

Abstract

A battery module includes a cell stack including stacked pouch-type secondary battery cells, which have electrode leads in opposite directions; a bus bar frame having first and second vertical plates and an upper plate connected to the first and second vertical plates to be hinged to at least one of the first and second vertical plates; and a mono-frame having a rectangular tube shape with an inner space in which the cell stack mounted to the bus bar frame is disposed. A plurality of bus bars are provided at outer surfaces of the first and second vertical plates, and the electrode leads of the cells are electrically connected to the corresponding bus bars through slots formed in the first and second vertical plates. A sensing member electrically connected to the bus bars of the vertical plates to sense electrical characteristics of the cells is disposed at the upper plate.

First claim

What is claimed is:

1. A battery module, comprising:
a cell stack including stacked pouch-type secondary battery cells, which have electrode leads in opposite directions;
a bus bar frame having first and second vertical plates respectively disposed at side surfaces of the cell stack corresponding to locations of the electrode leads of the cells and an upper plate connected to the first and second vertical plates and disposed at an upper portion of the cell stack to be hinged to at least one of the first and second vertical plates; and
a mono-frame having a rectangular tube shape with an inner space in which the cell stack mounted to the bus bar frame is inserted and disposed,
wherein a plurality of bus bars are provided at outer surfaces of the first and second vertical plates, and the electrode leads of the cells are electrically connected to the corresponding bus bars through slots formed in the first and second vertical plates,
wherein a sensing member electrically connected to the bus bars of the first and second vertical plates to sense electrical characteristics of the cells is disposed at the upper plate, and
wherein the bus bar frame has stoppers formed at inner surfaces of the first vertical plate and the second vertical plate to protrude toward the cell stack, so that the stoppers come into contact with a lower surface of the upper plate when the bus bar frame makes a right angle with the upper plate to prevent the respective vertical plate from being rotated over 90 degrees with respect to the upper plate.

2. The battery module according to claim 1 ,
wherein one end of the upper plate is connected to the first vertical plate by two hinges, and another end of the upper plate is connected to the second vertical plate by two hinges, and
wherein each stopper is provided in the form of at least one rectangular plate located between the two hinges of the respective vertical plate.

3. The battery module according to claim 1 ,
wherein the first vertical plate and the second vertical plate respectively include assembling guide units convexly formed at an inner surface thereof at regular intervals along a stacking direction of the battery cells and extending along a height direction of the respective vertical plate.

4. The battery module according to claim 3 ,
wherein each stopper is integrally formed with at least one of the assembling guide units of the respective vertical plate.

5. The battery module according to claim 1 ,
wherein the sensing member includes a circuit board, and a cable for connecting the bus bars and the circuit board.

6. The battery module according to claim 5 ,
wherein the upper plate has a cable wiring groove concavely formed at a surface thereof to correspond to a width and a thickness of the cable along a wiring path of the cable.

7. The battery module according to claim 6 ,
wherein the upper plate has an opening vertically formed therethrough at a location adjacent to the cable wiring groove.

8. A battery pack, comprising the battery module according to claim 1 .

9. A vehicle, comprising the battery pack according to claim 8 .

10. The battery module according to claim 5 ,
wherein the cable is a flexible printed circuit or a flexible fat cable.

11. The battery module according to claim 1 ,
wherein the upper plate is hingedly connected to only one of the first vertical plate and the second vertical plate.

12. The battery module according to claim 1 ,
wherein the first vertical plate and the second vertical plate respectively include convex assembling guide units extending along a height direction of the respective vertical plate at an inner surface thereof at regular intervals along a stacking direction of the battery cells, and
wherein each stopper is at least one rectangular plate integrally formed with at least one of the assembling guide units of the respective vertical plate.

Assignees

• Lg Chemical Ltd
• Lg Energy Solution Ltd

Inventors

• Jang Kyung-Soo
• Seol Jae-Jung
• Jung Jun-Hee

Classifications

• H01M50/519

  comprising printed circuit boards [PCB] · CPC title

• H01M50/503

  characterised by the shape of the interconnectors · CPC title

• H01M10/4207 Primary

  for several batteries or cells simultaneously or sequentially · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M50/502 Primary

  Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing · CPC title