Battery boiling cooling system and method of using a battery boiling cooling system
By using sensors to measure the state of phase change materials in the battery boiling cooling system and using a controller to adjust the flow rate, the problem of phase change materials being affected by temperature and pressure was solved, achieving precise control of battery temperature and uniform cooling.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SAMSUNG SDI CO LTD
- Filing Date
- 2025-11-12
- Publication Date
- 2026-06-09
Smart Images
Figure CN122177996A_ABST
Abstract
Claims
1. A battery boiling cooling system, the battery boiling cooling system comprising: An inlet temperature sensor is configured to measure an inlet temperature, which is the temperature of the refrigerant at the inlet location in the cooling flow path, the refrigerant comprising a phase change material that changes between a liquid phase and a gas phase; An outlet temperature sensor is configured to measure an outlet temperature, which is the temperature of the refrigerant at the outlet location where the refrigerant flows out of the cooling flow path. An inlet pressure sensor is configured to measure inlet pressure, which is the pressure of the refrigerant at the inlet location; An outlet pressure sensor is configured to measure an outlet pressure, which is the pressure of the refrigerant at the outlet location; as well as The controller is configured to control the refrigerant flow rate based on the inlet temperature, the outlet temperature, the inlet pressure, and the outlet pressure.
2. The battery boiling cooling system according to claim 1, wherein, The controller is configured to estimate the phase state of the refrigerant at the inlet location and the phase state of the refrigerant at the outlet location based on the phase change characteristics of the refrigerant, using the inlet temperature, the outlet temperature, the inlet pressure, and the outlet pressure, wherein the phase change characteristics of the refrigerant include one or more temperatures and one or more pressures of the refrigerant. The controller is configured to determine the refrigerant flow rate based on the phase state of the refrigerant at the inlet position and based on the phase state of the refrigerant at the outlet position.
3. The battery boiling cooling system according to claim 2, wherein, The controller is configured to reduce the refrigerant flow rate based on the phase state of the refrigerant at the inlet location and based on the phase state of the refrigerant at the outlet location if the difference between the inlet pressure and the outlet pressure is less than a threshold.
4. The battery boiling cooling system according to claim 3, wherein, The controller is configured to reduce the refrigerant flow rate by a first value if the difference between the inlet pressure and the outlet pressure is less than the threshold, and if the refrigerant phase at the inlet position and the refrigerant phase at the outlet position are both liquid.
5. The battery boiling cooling system according to claim 4, wherein, The controller is configured to: reduce the refrigerant flow rate by a second value, which is less than the first value, if the difference between the inlet pressure and the outlet pressure is less than the threshold, if the refrigerant at the inlet position is in a liquid state, and if the refrigerant at the outlet position is in a mixture of liquid and gas.
6. The battery boiling cooling system according to claim 4, wherein, The controller is configured to reduce the refrigerant flow rate by a second value, which is less than the first value, if the difference between the inlet pressure and the outlet pressure is less than the threshold, and if the phase state of the refrigerant at the inlet position and the phase state of the refrigerant at the outlet position are both a mixture of liquid and gas.
7. The battery boiling cooling system according to claim 3, wherein, The controller is configured to increase the refrigerant flow rate based on the phase state of the refrigerant at the inlet position and the phase state of the refrigerant at the outlet position if the difference between the inlet pressure and the outlet pressure is greater than or equal to the threshold.
8. The battery boiling cooling system according to claim 7, wherein, The controller is configured to increase the refrigerant flow rate by a third value if the difference between the inlet pressure and the outlet pressure is greater than or equal to the threshold, if the refrigerant at the inlet position is in a liquid state, and if the refrigerant at the outlet position is in a gaseous state.
9. The battery boiling cooling system according to claim 8, wherein, The controller is configured to increase the refrigerant flow rate by a fourth value, which is less than the third value, if the difference between the inlet pressure and the outlet pressure is greater than or equal to the threshold, if the refrigerant at the inlet position is in a liquid state, and if the refrigerant at the outlet position is in a mixture of liquid and gas.
10. The battery boiling cooling system according to claim 7, wherein, The controller is configured to increase the refrigerant flow rate by a third value if the difference between the inlet pressure and the outlet pressure is greater than or equal to the threshold, if the phase of the refrigerant at the inlet position is a mixture of liquid and gas, and if the phase of the refrigerant at the outlet position is gaseous.
11. The battery boiling cooling system according to claim 7, wherein, The controller is configured to increase the refrigerant flow rate by a fourth value, which is less than a third value, if the difference between the inlet pressure and the outlet pressure is greater than or equal to the threshold, and if the phase state of the refrigerant at the inlet position and the phase state of the refrigerant at the outlet position are both a mixture of liquid and gas.
12. A battery boiling cooling method, the method comprising the following steps: The system acquires inlet temperature, outlet temperature, inlet pressure, and outlet pressure. The inlet temperature is the temperature of the refrigerant measured at the inlet location in the cooling flow path, and the refrigerant includes a phase change material that changes between a liquid and a gas phase. The outlet temperature is the temperature of the refrigerant measured at the location where the refrigerant exits the cooling flow path. The inlet pressure is the pressure of the refrigerant measured at the inlet location, and the outlet pressure is the pressure of the refrigerant measured at the outlet location. as well as The refrigerant flow rate is controlled based on the inlet temperature, the outlet temperature, the inlet pressure, and the outlet pressure.
13. The battery boiling cooling method according to claim 12, wherein, The step of controlling the refrigerant flow rate based on the inlet temperature, the outlet temperature, the inlet pressure, and the outlet pressure includes: Based on the phase change characteristics of the refrigerant, the phase state of the refrigerant at the inlet location and the phase state of the refrigerant at the outlet location are estimated using the inlet temperature, the outlet temperature, the inlet pressure, and the outlet pressure. The phase change characteristics of the refrigerant include one or more temperatures and one or more pressures of the refrigerant. The refrigerant flow rate is determined based on the phase state of the refrigerant at the inlet position and based on the phase state of the refrigerant at the outlet position.
14. The battery boiling cooling method according to claim 13, wherein, The step of determining the refrigerant flow rate based on the phase state of the refrigerant at the inlet location and based on the phase state of the refrigerant at the outlet location includes: If the difference between the inlet pressure and the outlet pressure is less than a threshold, the refrigerant flow rate is reduced based on the phase state of the refrigerant at the inlet location and based on the phase state of the refrigerant at the outlet location; and If the difference between the inlet pressure and the outlet pressure is greater than or equal to a threshold, the refrigerant flow rate is increased based on the phase state of the refrigerant at the inlet position and based on the phase state of the refrigerant at the outlet position.
15. The battery boiling cooling method according to claim 14, wherein, The step of reducing the refrigerant flow rate based on the phase state of the refrigerant at the inlet position and based on the phase state of the refrigerant at the outlet position includes: If the refrigerant phase at both the inlet and outlet positions is liquid, then the refrigerant flow rate is reduced by a first value; and If the refrigerant at the inlet position is in a liquid state and if the refrigerant at the outlet position is in a mixture of liquid and gas, then the refrigerant flow rate is reduced by a second value, which is less than the first value.
16. The battery boiling cooling method according to claim 15, wherein, The step of reducing the flow rate of the refrigerant based on the phase state of the refrigerant at the inlet position and the phase state of the refrigerant at the outlet position further includes: if both the phase state of the refrigerant at the inlet position and the phase state of the refrigerant at the outlet position are a mixture of liquid and gas, then the flow rate of the refrigerant is reduced by a third value, the third value being less than the first value.
17. The battery boiling cooling method according to claim 16, further comprising setting at least one of the second value and the third value to 0.
18. The battery boiling cooling method according to claim 14, wherein, The step of increasing the flow rate of the refrigerant based on the phase state of the refrigerant at the inlet position and based on the phase state of the refrigerant at the outlet position includes: If the refrigerant at the inlet position is in a liquid state and if the refrigerant at the outlet position is in a gaseous state, then the refrigerant flow rate is increased by a third value; and If the refrigerant at the inlet position is in a liquid state and if the refrigerant at the outlet position is in a mixture of liquid and gas, then the refrigerant flow rate is increased by a fourth value, which is less than the third value.
19. The battery boiling cooling method according to claim 18, the method further comprising setting the fourth value to 0.
20. The battery boiling cooling method according to claim 14, wherein, The step of increasing the refrigerant flow rate based on the phase state of the refrigerant at the inlet position and based on the phase state of the refrigerant at the outlet position includes: If the refrigerant at the inlet position is a mixture of liquid and gas, and if the refrigerant at the outlet position is gaseous, then the refrigerant flow rate is increased by a third value; and If the refrigerant at the inlet position and the refrigerant at the outlet position are both in a mixture of liquid and gas, then the refrigerant flow rate is increased by a fourth value, which is less than the third value.