Battery module and method for cooling the battery module

• US 8,703,318 B2
• Filed: 07/29/2009
• Issued: 04/22/2014
• Est. Priority Date: 07/29/2009
• Status: Active Grant

• Current Assignee: LG Energy Solution Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Payne, Josh
• Primary Examiner(s): Ruddock, Ula C
• Assistant Examiner(s): Chmielecki, Scott J
• Application Number:
  US12/511,552
• Publication Number:
  US 20110027625A1
• Time in Patent Office: 1,728 Days
• Field of Search: 429/120
• US Class Current: 429/120
• CPC Class Codes: H01M 10/60 Heating or cooling; Temperature control
• CPC Class Codes: H01M 10/613 Cooling or keeping cold
• CPC Class Codes: H01M 10/6551 Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
• CPC Class Codes: H01M 10/6567 Liquids
• CPC Class Codes: H01M 10/6568 characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
• CPC Class Codes: H01M 10/66 Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
• CPC Class Codes: H01M 6/50 Methods or arrangements for servicing or maintenance, e.g. for maintaining operating temperature constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: H01M 6/5038 Heating or cooling of cells or batteries
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A battery module and a method for cooling the battery module are provided. The battery module includes a housing having an electrically non-conductive oil disposed therein, and a battery cell disposed in the housing that contacts the electrically non-conductive oil. The battery module further includes first and second heat conductive fins disposed in the housing that contacts the electrically non-conductive oil. The first and second heat conductive fins extract heat energy from the electrically non-conductive oil. The battery module further includes first and second conduits extending through the first and second heat conductive fins, respectively. The first and second conduits receive first and second portions of a fluid, respectively, therethrough and conduct heat energy from the first and second heat conductive fins, respectively, into the fluid to cool the battery cell.

Claims

1. A battery module, comprising:

a housing having a lower housing portion and a lid, the lid configured to be coupled to the lower housing portion, the lower housing portion having an electrically non-conductive oil disposed therein;

a battery cell disposed in the lower housing portion that contacts the electrically non-conductive oil;

first and second heat conductive fins being disposed entirely in the lower housing portion and proximate to first and second ends, respectively, of the battery cell, the first and second heat conductive fins contacting the electrically non-conductive oil, the first and second heat conductive fins configured to extract heat energy from the electrically non-conductive oil; and

first and second conduits extending through a first end of the lower housing portion and further extending through the first and second heat conductive fins, respectively, and further extending through a second end of the lower housing portion, the first and second conduits extending substantially parallel to one another and being disposed proximate to a bottom portion of the lower housing portion, the first and second conduits configured to receive first and second portions of a fluid, respectively, therethrough and to conduct heat energy from the first and second heat conductive fins, respectively, into the fluid to cool the battery cell.

2. The battery module of claim 1, wherein the first and second heat conductive fins are constructed from at least one of aluminum and copper.

3. The battery module of claim 1, wherein at least one of the lower housing portion and the lid is constructed from plastic.

4. The battery module of claim 1, wherein the electrically non-conductive oil comprises mineral oil.

5. The battery module of claim 1, wherein the fluid comprises a coolant.

6. The battery module of claim 5, wherein the coolant comprises at least one of ethylene glycol and propylene glycol.

7. The battery module of claim 1, wherein the fluid comprises a refrigerant.

8. The battery module of claim 1, wherein the first heat conductive fin is a first triangular-shaped sheet that is coupled to the first conduit such that heat energy is transferred from the first triangular-shaped sheet to the first conduit.

9. The battery module of claim 8, wherein the second heat conductive fin is a second triangular-shaped sheet that is coupled to the second conduit such that heat energy is transferred from the second triangular-shaped sheet to the second conduit.

10. A battery module, comprising:

a housing having a lower housing portion and a lid, the lid configured to be coupled to the lower housing portion, the lower housing portion having an electrically non-conductive oil disposed therein;

first and second battery cells being disposed in the lower housing portion that contact the electrically non-conductive oil, the first battery cell having a first body portion and a first flange extending from the first body portion, the second battery cell having a second body portion and a second flange extending from the second body portion;

a first heat conductive fin being disposed in the lower housing portion, at least a portion of the first heat conductive fin being disposed between the first and second flanges and proximate to the first and second body portions, the first heat conductive fin contacting the electrically non-conductive oil and being configured to extract heat energy from the electrically non-conductive oil; and

a first conduit extending through the lower housing portion and further extending through the first heat conductive fin, the first conduit being disposed proximate to a bottom portion of the lower housing portion, the first conduit configured to receive a fluid therethrough and to conduct heat energy from the first heat conductive fin into the fluid to cool the first and second battery cells.

11. The battery module of claim 10, wherein at least one of the lower housing portion and the lid is constructed from plastic.

12. The battery module of claim 10, wherein the first heat conductive fin is a first triangular-shaped sheet that is coupled to the first conduit such that heat energy is transferred from the first triangular-shaped sheet to the first conduit.

13. The battery module of claim 10, wherein the electrically non-conductive oil comprises mineral oil.

14. The battery module of claim 10, wherein the fluid comprises a coolant.

15. The battery module of claim 14, wherein the coolant comprises at least one of ethylene glycol and propylene glycol.

16. The battery module of claim 10, wherein the fluid comprises a refrigerant.