Thermal management device and battery pack

1. A thermal management device applied in a battery pack, the battery pack comprising a case and a plurality of cells ( 1 ) received in the case, the thermal management device comprising:

a thermal management loop ( 2 ) attached to each of the plurality of cells ( 1 ) and at least partially covering a part of a vent of each of the plurality of cells ( 1 );

a heat exchange member ( 4 ) communicating with the thermal management loop ( 2 ); and

a power component ( 3 ) connected between the thermal management loop ( 2 ) and the heat exchange member ( 4 ),

wherein a heat exchange medium with a fire-extinguishing function is provided within the thermal management loop ( 2 ), and the thermal management loop ( 2 ) is broken in a condition where at least one of the plurality of cells ( 1 ) is subjected to a thermal runaway such that the heat exchange medium flows into an explosion-proof port of the at least one of the plurality of cells ( 1 ) subjected to the thermal runaway.

2. The thermal management device according to claim 1 , wherein the thermal management loop ( 2 ) comprises:

a circulation pipe assembly ( 21 ) attached to each of the plurality of cells ( 1 ) and at least partially covering a part of the vent of each of the plurality of cells ( 1 ), wherein the heat exchange medium is provided within the circulation pipe assembly ( 21 ); and

a liquid storage tank ( 22 ) configured to store the heat exchange medium;

wherein the liquid storage tank ( 22 ), the power component ( 3 ) and the heat exchange member ( 4 ) are communicated with each other.

3. The thermal management device according to claim 2 , wherein the circulation pipe assembly ( 21 ) comprises:

a heat exchange assembly ( 211 ) attached to each of the plurality of cells ( 1 ), the heat exchange assembly ( 211 ) at least partially covering a part of the vent of each of the plurality of cells ( 1 ) and being provided with a liquid inlet port ( 2111 a ) and a liquid outlet port ( 2111 b ); and

a heat conductive connector ( 212 ) through which the heat exchange assembly ( 211 ) is connected to each of the plurality of cells ( 1 ).

4. The thermal management device according to claim 3 , wherein the heat exchange assembly ( 211 ) comprises:

a first guide tube ( 2111 ) provided with the liquid inlet port ( 2111 a ) and the liquid outlet port ( 2111 b );

a second guide tube ( 2112 ); and

a plurality of heat exchange plates ( 2113 ) connected to each of the plurality of cells ( 1 ) through the heat conductive connector ( 212 ) and configured as a cavity structure for receiving the heat exchange medium;

wherein the plurality of heat exchange plates ( 2113 ) is communicated between the first guide tube ( 2111 ) and the second guide tube ( 2112 ), and the plurality of heat exchange plates ( 2113 ) covers a part of the vent of each of the plurality of cells ( 1 ); and the plurality of heat exchange plates ( 2113 ) is broken in the condition where the at least one of the plurality of cells ( 1 ) is subjected to the thermal runaway such that the heat exchange medium flows into the explosion-proof port of the at least one of the plurality of cells ( 1 ) subjected to the thermal runaway.

5. The thermal management device according to claim 4 , wherein the plurality of heat exchange plates ( 2113 ) is spaced apart from each other and connected in series, and the plurality of heat exchange plates ( 2113 ) is arranged between and communicated with the first guide tube ( 2111 ) and the second guide tube ( 2112 ).

6. The thermal management device according to claim 4 , wherein a plurality of separating plates ( 2113 a ) is provided within the cavity structure of the plurality of heat exchange plates ( 2113 ) and configured to separate the cavity structure into a plurality of flow channels.

7. The thermal management device according to claim 4 , wherein the plurality of heat exchange plates ( 2113 ) is made of an aluminum alloy material or a magnesium alloy material.

8. The thermal management device according to claim 3 , wherein the heat conductive connector ( 212 ) is a heat conductive adhesive plate.

9. The thermal management device according to claim 8 , wherein the heat conductive adhesive plate is provided with a plurality of exhaust holes ( 2121 ) each corresponding to the vent of each of the plurality of cells ( 1 ).

10. A battery pack, comprising the thermal management device according to claim 1 .

11. The battery pack according to claim 10 , wherein the thermal management loop ( 2 ) comprises:

a circulation pipe assembly ( 21 ) attached to each of the plurality of cells ( 1 ) and at least partially covering a part of the vent of each of the plurality of cells ( 1 ), wherein the heat exchange medium is provided within the circulation pipe assembly ( 21 ); and

a liquid storage tank ( 22 ) configured to store the heat exchange medium;

wherein the liquid storage tank ( 22 ), the power component ( 3 ) and the heat exchange member ( 4 ) are communicated with each other.

12. The battery pack according to claim 11 , wherein the circulation pipe assembly ( 21 ) comprises:

a heat exchange assembly ( 211 ) attached to each of the plurality of cells ( 1 ), the heat exchange assembly ( 211 ) at least partially covering a part of the vent of each of the plurality of cells ( 1 ) and being provided with a liquid inlet port ( 2111 a ) and a liquid outlet port ( 2111 b ); and

a heat conductive connector ( 212 ) through which the heat exchange assembly ( 211 ) is connected to each of the plurality of cells ( 1 ).

13. The battery pack according to claim 12 , wherein the heat exchange assembly ( 211 ) comprises:

a first guide tube ( 2111 ) provided with the liquid inlet port ( 2111 a ) and the liquid outlet port ( 2111 b );

a second guide tube ( 2112 ); and

a plurality of heat exchange plates ( 2113 ) connected to each of the plurality of cells ( 1 ) through the heat conductive connector ( 212 ) and configured as a cavity structure for receiving the heat exchange medium;

wherein the plurality of heat exchange plates ( 2113 ) is communicated between the first guide tube ( 2111 ) and the second guide tube ( 2112 ), and the plurality of heat exchange plates ( 2113 ) covers a part of the vent of each of the plurality of cells ( 1 ); and the plurality of heat exchange plates ( 2113 ) is broken in the condition where the at least one of the plurality of cells ( 1 ) is subjected to the thermal runaway such that the heat exchange medium flows into the explosion-proof port of the at least one of the plurality of cells ( 1 ) subjected to the thermal runaway.

14. The battery pack according to claim 13 , wherein the plurality of heat exchange plates ( 2113 ) is spaced apart from each other and connected in series, and the plurality of heat exchange plates ( 2113 ) is arranged between and communicated with the first guide tube ( 2111 ) and the second guide tube ( 2112 ).

15. The battery pack according to claim 13 , wherein a plurality of separating plates ( 2113 a ) is provided within the cavity structure of the plurality of heat exchange plates ( 2113 ) and configured to separate the cavity structure into a plurality of flow channels.

16. The battery pack according to claim 13 , wherein the plurality of heat exchange plates ( 2113 ) is made of an aluminum alloy material or a magnesium alloy material.

17. The battery pack according to claim 12 , wherein the heat conductive connector ( 212 ) is a heat conductive adhesive plate.

18. The battery pack according to claim 17 , wherein the heat conductive adhesive plate is provided with a plurality of exhaust holes ( 2121 ) each corresponding to the vent of each of the plurality of cells ( 1 ).

19. A vehicle, comprising the battery pack according to claim 10 .