Battery pack and vehicle comprising the same

Patent metadata

Field	Value
Publication number	US-10752121-B2
Application number	US-201615554080-A
Country	US
Kind code	B2
Filing date	Jul 11, 2016
Priority date	Jul 20, 2015
Publication date	Aug 25, 2020
Grant date	Aug 25, 2020

Abstract

Provided is a battery pack including a pack case configured to form an exterior; a cell assembly accommodated in the pack case, and including a plurality of battery cells respectively including electrode leads; a pack cover configured to cover the pack case so as to package the cell assembly; and a lead connecting substrate provided between the cell assembly and the pack cover, configured to connect the electrode leads of the plurality of battery cells to one another, and including insert-molded terminals penetrating through the pack cover to be connected to an external power supply.

First claim

What is claimed is:

1. A battery pack comprising:
a pack case configured to form an exterior;
a cell assembly accommodated in the pack case, and comprising a plurality of battery cells, each battery cell including electrode leads;
a pack cover configured to cover the pack case so as to package the cell assembly; and
a lead connecting substrate provided between the cell assembly and the pack cover, configured to connect the electrode leads of the plurality of battery cells to one another, the lead connecting substrate including insert-molded terminals thereon, the terminals penetrating through the pack cover to be connected to an external power supply,
wherein the pack cover comprises terminal through units, through which the terminals penetrate, and the lead connecting substrate comprises terminal insert units welded to the terminal through units, and
wherein each of the terminal through units comprises:
a first internal wall having a hollow shape contacting an external surface of each of the terminals; and
a second internal wall extending from the first internal wall to be stepped, and configured to contact each of the terminal insert units.

2. The battery pack of claim 1 , wherein the terminal insert unit is engaged with the second internal wall.

3. The battery pack of claim 1 , wherein a width of an outer circumference of the terminal insert unit is greater than a width of an outer circumference of the terminal.

4. The battery pack of claim 1 , wherein the terminal through unit and the terminal insert unit are welded with each other through a laser welding process.

5. The battery pack of claim 1 , wherein the terminal through units are respectively provided in a side and other side of the pack cover, and the terminal insert units are respectively provided in a side and other side of the lead connecting substrate to correspond to the terminal through units.

6. The battery pack of claim 1 , wherein the lead connecting substrate further comprises bus bars configured to electrically connect the electrode leads to the terminals, and the bus bars are connected to the terminals in the terminal insert units.

7. The battery pack of claim 1 , wherein the pack cover is laser-welded to the pack case along with edges.

8. A vehicle comprising the battery pack according to claim 1 .

Assignees

• Lg Chemical Ltd

Inventors

• Yu Seung-Sik
• Kim Sung-Jong
• Seong Jun-Yeob

Classifications

• H01M50/507

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

• H01M50/249

  specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) · CPC title

• H01M50/209

  adapted for prismatic or rectangular cells (H01M50/216 takes precedence) · CPC title

• H01M50/271

  Lids or covers for the racks or secondary casings · CPC title

• H01M50/296

  characterised by terminals of battery packs (terminals of batteries H01M50/543) · CPC title