HEATING SHEET FOR BATTERY MODULE AND BATTERY MODULE INCLUDING SAME

• US 20150325892A1
• Filed: 08/26/2013
• Published: 11/12/2015
• Est. Priority Date: 12/21/2012
• Status: Active Grant

• Current Assignee: LG Energy Solution Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation), LG Hausys Limited
• Inventors: YUE, Seong Hoon, LEE, Jong Hun, SONG, Yea Ri, SHIN, Chang Hak, PARK, Ku Il, HWANG, Deok Ryul, PARK, Hwan Seok
• Granted Patent: US 9,742,046 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01M 10/615 Heating or keeping warm
• CPC Class Codes: H01M 10/625 Vehicles
• CPC Class Codes: H01M 10/655 Solid structures for heat exchange or heat conduction
• CPC Class Codes: H01M 10/6571 Resistive heaters arrangements for heating the battery by its resistance to the internal current H01M10/637
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H05B 2203/013 Heaters using resistive films or coatings
• CPC Class Codes: H05B 2214/04 Heating means manufactured by using nanotechnology
• CPC Class Codes: H05B 3/20 Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater H05B3/62, H05B3/68, H05B3/78, H05B3/84 take precedence
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

Provided is a heating sheet for a battery module, including: a surface heating element; an insulating layer on one surface of the surface heating element; and an insulating adhesive layer on the other surface of the surface heating element, in which the area of the heating portion of the surface heating element is 40% to 90% of the entire area of the battery cell to which the surface heating element is attached. Also provided is a battery module including the heating sheet for a battery module and the battery cell, in which the area of the heated portion of the battery cell is 40% to 90% of the entire area of the battery cell.

Claims

1. A heating sheet for battery modules, comprising:

a surface heating element;

an insulating layer formed on one surface of the surface heating element; and

an insulating adhesive layer formed on the other surface of the surface heating element,

wherein an area of a heating portion of the surface heating element is 40% to 90% of an entire area of a battery cell to which the surface heating element is attached.

2. The heating sheet according to claim 1, wherein the area of the heating portion of the surface heating element comprises an area, a temperature of which is higher by 30°

C. to 50°

C. than an initial temperature of the surface heating element.

3. The heating sheet according to claim 1, wherein the surface heating element generates heat only in the area of the heating portion of the surface heating element.

4. The heating sheet according to claim 1, wherein the surface heating element has a heating temperature of 20°

C. to 80°

C.

5. The heating sheet according to claim 1, wherein the surface heating element comprises a base film, a heating layer, and an electrode layer.

6. The heating sheet according to claim 5, wherein the heating layer comprises at least one selected from the group consisting of carbon nanotubes, carbon black, graphene, graphite, and combinations thereof.

7. The heating sheet for battery modules according to claim 5, wherein the heating layer has a thickness of 2 μ

m to 10 μ

m.

8. The heating sheet for battery modules according to claim 1, wherein the insulating adhesive layer has a thickness of 25 μ

m to 75 μ

m.

9. The heating sheet for battery modules according to claim 1, wherein the insulating layer has a thickness of 50 μ

m to 100 μ

m.

10. A battery module comprising:

the heating sheet for battery modules according to claim 1 and a battery cell,

wherein an area of a heated portion of the battery cell is 40% to 90% of the entire area of the battery cell.

11. The battery module according to claim 10, wherein the area of the heated portion of the battery cell comprises an area, a temperature of which is 30°

C. to 50°

C. higher than an initial temperature of the battery cell.

12. The battery module according to claim 10, wherein the heating sheet for battery modules increases a temperature of an electrolyte within the battery cell by 20°

C. or higher within 200 seconds from a start of heating.

13. The battery module according to claim 10, wherein the battery cell has a surface temperature of 20°

C. to 80°

C.

14. The battery module according to claim 10, wherein the electrolyte within the battery cell has a temperature of −

10°

C. to 35°

C.