Battery pack

Patent metadata

Field	Value
Publication number	US-9774064-B2
Application number	US-201514954459-A
Country	US
Kind code	B2
Filing date	Nov 30, 2015
Priority date	Nov 30, 2015
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

A battery pack having a first battery cell, a first cooling fin, and a housing is provided. The first cooling fin has a rectangular-shaped sheet, and at least first, second, and third tabs disposed perpendicular to first and second major surfaces of the first battery cell. A first side of the rectangular-shaped sheet of the first cooling fin contacts the first major surface of the first battery cell. The first battery cell and the first cooling fin are disposed within an interior region of the housing. The housing has a first flow path within the interior region between a top edge of the first battery cell and a top wall of the housing, such that air flowing through the first flow path contacts the first, second, and third tabs of the first cooling fin to conduct heat energy away from the first cooling fin to reduce a temperature level of the first battery cell.

First claim

What is claimed is:

1. A battery pack, comprising:
a first battery cell having a substantially rectangular-shaped body with a first major surface and a second major surface;
a first cooling fin having a substantially rectangular-shaped sheet and at least first, second, and third flat rectangular-shaped tabs; the substantially rectangular-shaped sheet of the first cooling fin having a first side and a second side; the first, second, and third flat rectangular-shaped tabs of the first cooling fin being coupled to a top end of the substantially rectangular-shaped sheet of the first cooling fin and extending upwardly from the substantially rectangular-shaped sheet of the first cooling fin; the first, second, and third flat rectangular-shaped tabs of the first cooling fin being disposed and extending substantially perpendicular to the first and second sides of the substantially rectangular-shaped sheet of the first cooling fin and extending past both the first and second sides of the substantially rectangular-shaped sheet of the first cooling fin; the first, second, third flat rectangular-shaped tabs of the first cooling fin being further disposed substantially perpendicular to the first and second major surfaces of the first battery cell; the first side of the substantially rectangular-shaped sheet of the first cooling fin being disposed directly against and contacting the first major surface of the substantially rectangular-shaped body of the first battery cell; and
a housing defining an interior region therein, the first battery cell and the first cooling fin being disposed within the interior region, the housing having a first flow path within the interior region between a top edge of the first battery cell and a top wall of the housing, the first and second major surfaces of the first battery cell being disposed substantially perpendicular to the first flow path, such that air flowing through the first flow path contacts the first, second, and third flat rectangular-shaped tabs of the first cooling fin to conduct heat energy away from the first cooling fin to reduce a temperature level of the first battery cell.

2. The battery pack of claim 1 , wherein a vertical height of each of the first, second, and third flat rectangular-shaped tabs of the first cooling fin is less than 30% of a vertical height of the substantially rectangular-shaped sheet of the first cooling fin.

3. The battery pack of claim 1 , wherein the first, second, and third flat rectangular-shaped tabs of the first cooling fin are disposed substantially parallel to one another.

4. The battery pack of claim 1 , further comprising:
a second battery cell having a substantially rectangular-shaped body with a first major surface and a second major surface; and
the first major surface of the second battery cell being disposed directly against and contacting the second side of the substantially rectangular-shaped sheet of the first cooling fin.

5. The battery pack of claim 4 , further comprising:
a second cooling fin having a substantially rectangular-shaped sheet and at least first, second, and third flat rectangular-shaped tabs; the substantially rectangular-shaped sheet of the second cooling fin having a first side and a second side; the first, second, and third flat rectangular-shaped tabs of the second cooling fin being coupled to a top end of the substantially rectangular-shaped sheet of the second cooling fin and extending upwardly from the substantially rectangular-shaped sheet of the second cooling fin; the first, second, and third flat rectangular-shaped tabs of the second cooling fin being disposed substantially perpendicular to the first and second sides of the substantially rectangular-shaped sheet of the second cooling fin and extending past both the first and second sides of the substantially rectangular-shaped sheet of the second cooling fin; the first, second, and third flat rectangular-shaped tabs of the second cooling fin being further disposed substantially perpendicular to the first and second major surfaces of the second battery cell; the first side of the substantially rectangular-shaped sheet of the second cooling fin being disposed directly against and contacting the second major surface of the substantially rectangular-shaped body of the second battery cell;
a third battery cell having a substantially rectangular-shaped body with a first major surface and a second major surface; and
the first major surface of the third battery cell being disposed directly against and contacting the second side of the substantially rectangular-shaped sheet of the second cooling fin.

6. The battery pack of claim 5 , wherein the first, second, and third flat rectangular-shaped tabs of the first cooling fin extend substantially planar with the first, second, and third flat rectangular-shaped tabs, respectively, of the second cooling fin.

7. The battery pack of claim 6 , wherein the first flat rectangular-shaped tab of the first cooling fin and the first flat rectangular-shaped tab of the second cooling fin are disposed apart from one another such a gap is formed therebetween.

8. The battery pack of claim 1 , wherein the first battery cell is a pouch-type lithium-ion battery cell and the substantially rectangular-shaped body thereof is a substantially rectangular-shaped pouch-type body.

9. The battery pack of claim 1 , wherein the first battery cell further includes first and second electrical terminals extending outwardly from the substantially rectangular-shaped body thereof, the first and second electrical terminals extending in a direction parallel to the first flow path.

10. The battery pack of claim 1 , wherein the first side of the substantially rectangular-shaped sheet of the first cooling fin contacts at least 90% of the first major surface of the first battery cell.

11. A battery pack, comprising:
a first battery cell having a substantially rectangular-shaped body with a first major surface and a second major surface;
a first cooling fin having a substantially rectangular-shaped sheet and at least first, second, and third rectangular-shaped tabs; the substantially rectangular-shaped sheet of the first cooling fin having a first side and a second side; the first, second, and third rectangular-shaped tabs of the first cooling fin being coupled to a top end of the substantially rectangular-shaped sheet of the first cooling fin and extending upwardly from the substantially rectangular-shaped sheet of the first cooling fin; the first, second, and third rectangular-shaped tabs of the first cooling fin being disposed and extending substantially perpendicular to the first and second sides of the substantially rectangular-shaped sheet of the first cooling fin and extending past both the first and second sides of the substantially rectangular-shaped sheet of the first cooling fin; the first, second, and third rectangular-shaped tabs of the first cooling fin being further disposed substantially perpendicular to the first and second major surfaces of the first battery cell; the first side of the substantially rectangular-shaped sheet of the first cooling fin being disposed directly against and contacting the first major surface of the substantially rectangular-shaped body of the first battery cell; and
a housing defining an interior region therein, the first battery cell and the first cooling fin being disposed within the interior region, the housing having a first flow path within the interior region between a top edge of the first battery cell and a top wall of the housing, the first and second major surface of the first battery cell being disposed substantially perpendicular to the first flow path, such that air flowing through the first flow

Assignees

• Lg Chemical Ltd

Inventors

• Dudley Scott
• Merriman Robert

Classifications

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M10/613

  Cooling or keeping cold · CPC title

• H01M10/6556

  Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552) · CPC title

• H01M10/6551 Primary

  Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings · CPC title

• H01M10/6555

  arranged between the cells · CPC title