Battery pack

Patent metadata

Field	Value
Publication number	US-2023089745-A1
Application number	US-202117478623-A
Country	US
Kind code	A1
Filing date	Sep 17, 2021
Priority date	Sep 17, 2021
Publication date	Mar 23, 2023
Grant date	—

Abstract

A battery pack includes a housing and a plurality of battery cells. A printed circuit board is supported within the housing and is electrically coupled to a plurality of electrical terminals configured to mate with a plurality of electrical terminals of the device. A cell strap in electrical communication with at least one of the plurality of battery cells and in electrical communication with the printed circuit board. A fuse is coupled to the printed circuit board. A heat shield is coupled to the fuse. The heat shield is configured to inhibit heat transfer between the fuse and other components of the battery pack.

First claim

What is claimed is:

1 . A battery pack comprising:
a housing; a plurality of battery cells; a printed circuit board supported within the housing, the printed circuit board electrically coupled to a plurality of electrical terminals configured to mate with a plurality of electrical terminals of a device; a cell strap in electrical communication with at least one of the plurality of battery cells, the cell strap in electrical communication with the printed circuit board; a fuse coupled to the printed circuit board; and a heat shield coupled to the fuse, the heat shield configured to inhibit heat transfer between the fuse and other components of the battery pack.

2 . The battery pack of claim 1 , wherein the heat shield comprises silicon.

3 . The battery pack of claim 1 , wherein the heat shield comprises silicon carbide.

4 . The battery pack of claim 1 , wherein the heat shield is adhered to the fuse by an adhesive material.

5 . The battery pack of claim 1 , wherein the cell strap includes a battery cell connection part coupled to a terminal of the at least one of the plurality of battery cells, and a coupling part extending from the battery cell connection part, at least a portion of the coupling part directly coupled to at least a portion of the fuse.

6 . The battery pack of claim 5 , further comprising a thermally conductive pad positioned between the battery cell connection part and the housing.

7 . The battery pack of claim 1 , wherein the heat shield comprises a ceramic material that is metal free and has a lower heat conductivity than a material including metal.

8 . A battery pack comprising:
a housing; a plurality of battery cells supported within the housing; a printed circuit board supported within the housing, the printed circuit board electrically coupled to a plurality of electrical terminals configured to mate with a plurality of electrical terminals of a device; a cell strap in electrical communication with at least one of the plurality of battery cells, the cell strap in electrical communication with the printed circuit board; a fuse coupled to the printed circuit board; a heat shield proximate the fuse; and a thermally conductive pad positioned within the housing.

9 . The battery pack of claim 8 , wherein the cell strap includes a battery cell connection part coupled to a terminal of the at least one of the plurality of battery cells, and a coupling part extending from the battery cell connection part, at least a portion of the coupling part in direct contact with the fuse.

10 . The battery pack of claim 9 , wherein the thermally conductive pad is positioned between the battery cell connection part and the housing.

11 . The battery pack of claim 8 , further comprising an electrically insulating material, the fuse positioned between the electrically insulating material and the heat shield.

12 . The battery pack of claim 8 , wherein the heat shield is formed from a ceramic material that is metal-free and has a lower heat conductivity than metal.

13 . The battery pack of claim 8 , wherein the heat shield is formed from silicon.

14 . The battery pack of claim 8 , wherein the heat shield is formed from silicon carbide.

15 . The battery pack of claim 8 , wherein the heat shield is adhered to the fuse by an adhesive material.

16 . A method of manufacturing a battery pack, the method comprising:
positioning a plurality of battery cells and a printed circuit board within a housing; coupling a cell strap to at least one of the plurality of cells; coupling a fuse between the cell strap and the printed circuit board; and coupling a heat shield to the fuse.

17 . The battery pack of claim 16 , wherein coupling the heat shield to the fuse includes adhering the heat shield to the fuse with an adhesive material.

18 . The battery pack of claim 16 , further comprising positioning a thermally conductive pad between the cell strap and the housing.

19 . The battery pack of claim 16 , further comprising positioning an electrically insulating material adjacent a side of the fuse that is opposite the heat shield.

20 . The battery pack of claim 16 , wherein the heat shield is formed of a ceramic material that is metal-free and has a lower heat conductivity than metal, the heat shield including silicon.

Assignees

• Techtronic Cordless Gp

Inventors

• Bryan Frederick W
• Strickland Blake
• Thompson Michael Macquillan
• Nemshon Michael

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M50/213 Primary

  adapted for cells having curved cross-section, e.g. round or elliptic (H01M50/209, H01M50/216 take precedence) · CPC title

• H01M50/284

  with incorporated circuit boards, e.g. printed circuit boards [PCB] · CPC title

• H01M10/658

  by thermal insulation or shielding · CPC title

• H01M50/583 Primary

  in response to current, e.g. fuses · CPC title