Heat Dissipating Device for a Battery Pack, and a Battery Pack Using the Same

• US 20080292949A1
• Filed: 05/08/2006
• Published: 11/27/2008
• Est. Priority Date: 11/08/2005
• Status: Active Grant

• Current Assignee: BYD Company Limited
• Original Assignee: BYD Company Limited
• Inventors: Shen, Xi, Zhu, Jianhua, Lai, Qing, Han, Yili
• Granted Patent: US 8,574,739 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 15/0266 with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers F28D15/043 takes precedence
• CPC Class Codes: H01M 10/613 Cooling or keeping cold
• CPC Class Codes: H01M 10/625 Vehicles
• CPC Class Codes: H01M 10/6552 Closed pipes transferring heat by thermal conductivity or phase transition, e.g. heat pipes
• CPC Class Codes: H01M 10/6555 arranged between the cells
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

Disclosed herein is a heat dissipating device for a battery pack which comprises a heat pipe and a heat collecting plate comprising a bottom heat collecting plate and an upper heat collecting plate each having a hole therein, wherein two ends of the heat pipe are inserted respectively into the holes in the bottom heat collecting plate and the upper heat collecting plate. A battery using the heat dissipating device is also disclosed. During the operation of the heat dissipating device, since the heat generated by the cells can be collected in the upper heat collecting plate, then transmitted to the bottom heat collecting plate through the heat pipe, and finally dissipated outwardly by the bottom heat collecting plate, the heat generated by cells can be dissipated rapidly and efficiently.

Claims

1. A heat dissipating device for a battery pack, comprising:

a heat pipe (1); and

a heat collecting plate (2) comprising a bottom heat collecting plate (11) and a upper heat collecting plate (12) which both have a hole (13) formed therein;

wherein, two ends of the heat pipe (1) are inserted respectively into the holes (13) of the bottom heat collecting plate (11) and the upper heat collecting plate (12).

2. The heat dissipating device as claimed in claim 1, wherein,

the number of the upper heat collecting plate (12) is more than one and each upper heat collecting plate (12) has at least one hole;

the bottom heat collecting plate (11) has more than one holes therein; and

the heat pipe (1) is U-shaped, and one end of each U-shaped heat pipe is inserted into one hole of the bottom heat collecting plate (11) and the other end is inserted into one hole of the upper heat collecting plate (12).

3. The heat dissipating device as claimed in claim 2, wherein,

the number of the holes in the bottom heat collecting plate (11) is equal to the number of the U-shaped heat pipe (1);

and

the holes in the bottom heat collecting plate (11) are parallel with each other.

4. The heat dissipating device as claimed in claim 1, wherein,

the bottom heat collecting plate (11) has a projection (18) and/or a groove (19) on its upper surface, and

the upper heat collecting plate (12) has a projection (18) and/or a groove (19) on its surface.

5. The heat dissipating device as claimed in claim 4, wherein,

the number of the projection (18) and/or groove (19) is more than one;

and

these projections (18) and/or grooves (19) are arranged longitudinally in parallel along with the upper surface of the bottom heat collecting plate (11) and the surface of the upper heat collecting plate (12).

6. The heat dissipating device as claimed in claim 1, wherein,

a heat dissipating structure, which is a heat sink (14) or a heat dissipating plate (3), is provided under the lower surface of the bottom heat collecting plate (1).

7. A battery pack comprising a plurality of cells (4) connected in series or in parallel, characterized in that, it further comprises a heat dissipating device which comprises:

a heat pipe (1); and

a heat collecting plate (2) comprising a bottom heat collecting plate (11) and a upper heat collecting plate (12) which both have a hole (13) formed therein, and between which the cells (4) are interposed;

wherein, two ends of the heat pipe are inserted respectively into the holes (13) of the bottom heat collecting plate and the upper heat collecting plate.

8. The battery pack as claimed in claim 7, wherein,

the number of the upper heat collecting plate (12) is more than one and each upper heat collecting plate (12) has at least one hole;

the cells (4) are interposed between the bottom heat collecting plate (11) and one adjacent upper heat collecting plate (12), and between two adjacent upper heat collecting plates (12);

the bottom heat collecting plate (11) has more than ones holes therein; and

the heat pipe (1) is U-shaped, and one end of each U-shaped heat pipe is inserted into one hole of the bottom heat collecting plate (11) and the other end is inserted into one hole of the upper heat collecting plate (12).

9. The battery pack as claimed in claim 8, wherein,

the number of the holes in the bottom heat collecting plate (11) is equal to the number of the U-shaped heat pipe (1);

and

the holes in the bottom heat collecting plate (11) are parallel with each other.

10. The battery pack as claimed in claim 7, wherein,

a heat dissipating structure, which is a heat sink (14) or a heat dissipating plate (3), is provided under the lower surface of the bottom heat collecting plate (1).

11. The battery pack as claimed in claim 7, further comprising:

a supporting frame (5) on which the heat collecting plate (2) is fixed.

12. The battery pack as claimed in claim 7, wherein,

the contacting surfaces between the cells (4) and the bottom and upper heat collecting plates are coated with a heat conductive adhesive.

13. The battery pack as claimed in claim 7, wherein,

the cells (4) have grooves on the surface thereof;

and

the bottom and upper heat collecting plates have projections (18) mating with the grooves on their surfaces contacting with the cells (4).

14. The battery pack as claimed in claim 7, wherein,

the cells (4) are cylindrical cells;

and

the bottom and upper heat collecting plates have grooves (19) mating with the surface of the cylindrical cells on their surfaces contacting with the cells (4).