Battery pack

• US 20110183178A1
• Filed: 08/04/2010
• Published: 07/28/2011
• Est. Priority Date: 01/27/2010
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH, Samsung SDI Company Limited
• Original Assignee: Robert Bosch GmbH, Samsung SDI Company Limited
• Inventors: Sohn, Kwon
• Granted Patent: US 8,703,320 B2
• Time in Patent Office: Days
• US Class Current: 429/120
• CPC Class Codes: F28D 15/0233 the conduits having a particular shape, e.g. non-circular cross-section, annular F28D15/0241, F28D15/0266 take precedence
• CPC Class Codes: F28D 15/0275 Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
• CPC Class Codes: F28D 15/046 characterised by the material or the construction of the capillary structure
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0587 of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
• CPC Class Codes: H01M 10/613 Cooling or keeping cold
• CPC Class Codes: H01M 10/647 Prismatic or flat cells, e.g. pouch cells
• CPC Class Codes: H01M 10/6551 Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
• CPC Class Codes: H01M 10/6552 Closed pipes transferring heat by thermal conductivity or phase transition, e.g. heat pipes
• CPC Class Codes: H01M 10/6572 Peltier elements or thermoelectric devices
• CPC Class Codes: H10N 10/13 characterised by the heat-exchanging means at the junction
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A battery pack includes a secondary battery, an outer case receiving the secondary battery, and a cooling unit disposed at a predetermined position of the outer case, wherein the cooling unit includes a first heatsink disposed toward the inside of the outer case, a second heatsink disposed toward the outside of the outer case, and a thermoelectric device between the first heatsink and the second heatsink.

Claims

1. A battery pack, comprising:

a secondary battery;

an outer case receiving the secondary battery; and

a cooling unit disposed at a predetermined position of the outer case,

wherein the cooling unit includes;

a first heatsink disposed toward the inside of the outer case;

a second heatsink disposed toward the outside of the outer case; and

a thermoelectric device between the first heatsink and the second heatsink.

2. The battery pack as claimed in claim 1, further comprising a heat pipe attached to a bottom surface of the secondary battery.

3. The battery pack as claimed in claim 2, wherein the heat pipe has a pipe shape having a surface corresponding to the bottom surface of the secondary battery.

4. The battery pack as claimed in claim 2, wherein an end of a side of the heat pipe contacts the first heatsink.

5. The battery pack as claimed in claim 2, wherein an end of a side of the heat pipe is inserted into at least one heatsink pin of the first heatsink.

6. The battery pack as claimed in claim 1, wherein the outer case receives at least two secondary batteries therein.

7. The battery pack as claimed in claim 6, wherein the secondary batteries are spaced a predetermined distance from each other, arranged in a plurality of layers, and received in the outer case.

8. The battery pack as claimed in claim 6, wherein the secondary batteries are spaced a predetermined distance from each other, arranged in a plurality of rows and layers, and received in the outer case.

9. The battery pack as claimed in claim 1, wherein the secondary battery comprises:

an electrode assembly;

a can receiving the electrode assembly; and

a cap plate covering the can, wherein;

the electrode assembly includes a first electrode plate, a second electrode plate, and a separator disposed between the first electrode plate and the second electrode plate to insulate the first electrode plate from the second electrode plate, and

the first electrode plate, the second electrode plate, and the separator are wound.

10. The battery pack as claimed in claim 9, wherein:

the first electrode plate includes a first non-coated portion on which a first active material is not coated, and the second electrode plate includes a second non-coated portion on which a second active material is not coated, and

the first non-coated portion protrudes through one side of the separator and the second non-coated portion protrudes through another side of the separator so as to protrude in directions opposite to each other.

11. The battery pack as claimed in claim 10, wherein the secondary battery comprises:

a first electrode terminal connected to the first non-coated portion; and

a second electrode terminal connected to the second non-coated portion, wherein;

the first electrode terminal includes;

a first extension part connected to the first non-coated portion;

a first bolt part passing through the cap plate to protrude to the outside of the secondary battery; and

a second extension part connecting the first extension part to the first bolt part, and

the second electrode terminal includes;

a third extension part connected to the second non-coated part;

a second bolt part passing through the cap plate to protrude to the outside of the secondary battery; and

a fourth extension part connecting the third extension part to the second bolt part.