CN-115863854-B - Cooling device and battery pack

CN115863854BCN 115863854 BCN115863854 BCN 115863854BCN-115863854-B

Abstract

The application discloses a cooling device and a battery pack. This cooling device cools down the coolant liquid that flows back to the cooling chamber through the cooling medium in the cooling chamber, and cooling device self disposes the cold source that is applied to the coolant liquid cooling promptly, need not to rely on the outside system of cooling device to cool down the cooling device to its high temperature coolant liquid after cooling the battery module among the cooling device, therefore can simplify cooling device, is favorable to reducing battery module's heat dissipation cost. And the heat dissipation cavity and the cooling cavity form a complete cooling liquid circulation loop through the first flow path structure and the second flow path structure, and the high-temperature cooling liquid after heat dissipation of the battery module is re-applied to heat dissipation of the battery module after cooling through a cooling medium, and is not directly discharged to the external environment, so that the influence of the cooling device on the external environment can be reduced.

Inventors

LU YANG
Lu Zongzhen
MOU JIAN
WEI JIEHONG

Assignees

欣旺达电动汽车电池有限公司

Dates

Publication Date: 20260508
Application Date: 20221221

Claims (9)

1.A cooling device, comprising: The cooling cavity is used for storing cooling liquid and cooling media, the cooling media is used for cooling the cooling liquid in the cooling cavity, the supporting seat further comprises a top plate and a separation part, the top plate is adjacent to the cooling cavity to support the battery module, and the separation part is arranged between the cooling cavity and the cooling cavity to separate the cooling cavity from the cooling cavity; the pump body is arranged in the heat dissipation cavity and/or the cooling cavity; The cooling liquid in the cooling cavity is conveyed to the cooling cavity through the first flow path structure under the action of the pump body, the cooling liquid in the cooling cavity exchanges heat through the top plate to cool the battery module, the cooling liquid in the cooling cavity also flows back to the cooling cavity through the second flow path structure, and the cooling liquid circularly flows between the cooling cavity and the cooling cavity; The first flow path structure includes: The buffer cavity is arranged in the supporting seat and is respectively in fluid communication with the heat dissipation cavity and the cooling cavity, wherein the cooling liquid from the cooling cavity is mixed with the cooling liquid in the buffer cavity and then is conveyed to the heat dissipation cavity, and the buffer cavity is adjacent to the top plate, so that the cooling liquid in the buffer cavity can dissipate heat of the battery module through the top plate; The second flow path structure includes: A return port which is arranged on the separation part, and the cooling liquid sprayed out of the spray head flows back to the cooling cavity through the return port; The cooling cavity is provided with a cooling cavity, a cooling pipe is arranged at the outer part of the supporting seat, one end of the cooling pipe is connected with the cooling cavity, and the cooling liquid in the cooling pipe flows back to the cooling cavity through the cooling pipe; the cooling device further includes: the cooling tube is arranged in the cooling cavity, the cooling tube comprises a plurality of spray heads, cooling liquid in the cooling tube is sprayed out to the top plate through the spray heads so as to cool the battery module, then the cooling liquid flows to the reflux port along the cavity wall of the cooling cavity, flows back to the cooling cavity through the reflux port, and cooling liquid which is not sprayed out in the cooling tube flows back to the cooling cavity along the connecting pipe.
2. The cooling device of claim 1, wherein the buffer chamber has a volume greater than or equal to a volume of the cooling chamber.
3. The cooling device according to claim 1, characterized in that the cooling device further comprises: a stirring member rotatably provided in the buffer chamber for mixing the cooling liquid from the cooling chamber with the cooling liquid in the buffer chamber, and And the stirring driving piece is fixedly connected with the supporting seat and is in transmission connection with the stirring member and used for driving the stirring member to rotate.
4. The cooling device of claim 1, wherein the pump body comprises: the first pump body is arranged in the buffer cavity; the first flow path structure further includes: And one end of the first conveying pipe is connected with the first pump body, the other end of the first conveying pipe is connected to the heat dissipation cavity, and the first pump body is used for conveying the mixed cooling liquid to the heat dissipation cavity through the first conveying pipe.
5. The cooling device of claim 1, wherein the heat dissipation chamber and the temperature reduction chamber are on a same side of the buffer chamber and the temperature reduction chamber is on a side of the heat dissipation chamber facing away from the top plate.
6. The cooling device of claim 1, wherein the pump body comprises: the second pump body is arranged in the cooling cavity; the first flow path structure further includes: The second conveying pipe, the one end of second conveying pipe with the second pump body is connected, and the other end is connected to the buffer chamber, the second pump body is used for will the cooling liquid after cooling medium cooling passes through the second conveying pipe is carried to the buffer chamber.
7. The cooling device of claim 4, wherein the heat dissipation chamber is connected to the first delivery tube.
8. A battery pack comprising a battery module and the cooling device according to any one of claims 1 to 7, wherein the battery module is provided on the cooling device, and the cooling device exchanges heat with the battery module.
9. The battery pack according to claim 8, wherein the battery pack includes a first direction, the first direction being a height direction of the battery pack, the battery module being disposed on the cooling device along the first direction; The battery pack further includes: a first mounting mechanism connected with one of the battery module and the cooling device; A second mounting mechanism connected to the other of the battery module and the cooling device, the first and second mounting mechanisms being disposed opposite to each other in the first direction, and The lifting mechanism is in transmission connection with the first installation mechanism and/or the second installation mechanism, the lifting mechanism is used for driving the first installation mechanism and the second installation mechanism to be close to each other, and the first installation mechanism and the second installation mechanism are fixedly connected so as to fix the battery module to the cooling device.

Description

Cooling device and battery pack Technical Field The application relates to the technical field of batteries, in particular to a cooling device and a battery pack. Background The electric automobile uses the vehicle-mounted power supply as power, and compared with the traditional automobile, the electric automobile has small influence on the environment, so that the electric automobile has a wide prospect. The battery used as a vehicle-mounted power supply in the electric automobile can generate a large amount of heat in the daily use process, so that the battery needs to be matched with a corresponding cooling system to dissipate heat. However, the cooling medium (such as low-temperature gas) of the cooling system applied to the battery cooling at present needs to rely on an external system to cool the cooling medium, so that the cooling medium can be applied to cooling the battery, which results in the complexity of the current cooling system and high cost of cooling the battery. In addition, the inside of the conventional cooling system is not designed with a complete loop, and the high-temperature cooling medium after radiating the battery is usually directly discharged to the external environment, so that the external environment is easily influenced. Disclosure of Invention The application provides a cooling device and a battery pack, which can simplify the cooling device and reduce the influence of the cooling device on the external environment. The application provides a cooling device. The cooling device comprises a supporting seat, a pump body, a cooling cavity, a first flow path structure and a second flow path structure, wherein a cooling cavity, a first flow path structure and a second flow path structure are arranged in the supporting seat, the cooling cavity is respectively in fluid communication with the cooling cavity through the first flow path structure and the second flow path structure, the cooling cavity is used for storing cooling liquid and cooling media, the cooling media are used for cooling the cooling liquid in the cooling cavity, the supporting seat further comprises a top plate adjacent to the cooling cavity and used for supporting a battery module, the pump body is arranged in the cooling cavity and/or the cooling cavity, the cooling liquid in the cooling cavity is conveyed to the cooling cavity through the first flow path structure under the action of the pump body, the cooling liquid in the cooling cavity exchanges heat through the top plate to cool the battery module, the cooling liquid in the cooling cavity flows back to the cooling cavity through the second flow path structure, and the cooling liquid circularly flows between the cooling cavity and the cooling cavity. In one embodiment of the application, the first flow path structure comprises a buffer cavity which is arranged in the supporting seat and is respectively in fluid communication with the heat dissipation cavity and the cooling cavity, wherein the cooling liquid from the cooling cavity is mixed with the cooling liquid in the buffer cavity and then is conveyed to the heat dissipation cavity. In an embodiment of the application, a volume of the buffer cavity is greater than or equal to a volume of the cooling cavity. In one embodiment of the application, the cooling device further comprises a stirring member rotatably arranged in the buffer cavity and used for mixing the cooling liquid from the cooling cavity with the cooling liquid in the buffer cavity, and a stirring driving piece fixedly connected to the supporting seat and in transmission connection with the stirring member and used for driving the stirring member to rotate. In one embodiment of the application, the pump body comprises a first pump body arranged in the buffer cavity, and the first flow path structure further comprises a first conveying pipe, wherein one end of the first conveying pipe is connected with the first pump body, the other end of the first conveying pipe is connected to the heat dissipation cavity, and the first pump body is used for conveying the mixed cooling liquid to the heat dissipation cavity through the first conveying pipe. In an embodiment of the application, the heat dissipation cavity and the cooling cavity are located at the same side of the buffer cavity, and the cooling cavity is located at a side of the heat dissipation cavity away from the top plate. In an embodiment of the application, the buffer cavity is adjacent to the top plate, so that the cooling liquid in the buffer cavity can dissipate heat of the battery module through the top plate. In one embodiment of the application, the pump body comprises a second pump body arranged in the cooling cavity, and the first flow path structure further comprises a second conveying pipe, one end of the second conveying pipe is connected with the second pump body, the other end of the second conveying pipe is connected to the buffer cavity, and the second pump body is used fo