Heat management unit with double water paths
By integrating the dual water module of PCS and battery cells in the thermal management unit, heat exchanger and three-way valve are used to achieve heat exchange and heat energy recovery, the problems of large volume and high energy consumption of traditional thermal management units are solved, and efficient cooling and heat energy recovery are achieved.
Patent Information
- Application Number
- CN202421800578.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-07-29
AI Technical Summary
In traditional thermal management units, the waterways of PCS and battery cells are separate, resulting in large volume occupancy of equipment and dependence on external refrigeration equipment, and high energy consumption.
A thermal management unit with dual waterways is designed. By integrating the first and second waterway modules of PCS and battery cells into a thermal management unit, heat exchangers are used to realize heat exchange of refrigerant and coolant, reliance on external refrigeration equipment is reduced, and thermal energy recovery is achieved through three-way valves.
Reduces the number and space consumption of equipment, improves the compactness between equipment, reduces energy consumption, and improves energy utilization efficiency through thermal energy recovery.
Smart Images
Figure CN223020571U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of thermal management units, and particularly relates to a thermal management unit with a dual water circuit. Background Art
[0002] Among the power consumption of energy storage containers, the thermal management unit of the air conditioning system accounts for a large part; at the same time, the thermal management unit also occupies a relatively large space in the energy storage container. In the traditional solution, the water circuits for controlling the temperature of the PCS (energy storage converter) and the battery cells are separate, increasing the occupied volume of the thermal management unit.
[0003] Based on this, this application provides a thermal management unit with a dual water circuit to improve related technologies. Utility Model Content
[0004] This application provides a thermal management unit with a dual water circuit, which can integrate the first water circuit module and the second water circuit module for the PCS and the battery cells into one thermal management unit, solving the problem of large occupied volume of the thermal management unit.
[0005] This application proposes a thermal management unit with a dual water circuit, including: a refrigeration system module, a first water circuit module, and a second water circuit module;
[0006] The refrigeration system module includes a compressor, a condenser, an electronic expansion valve, and a heat exchanger. The heat exchanger has a first channel and a second channel for heat exchange with each other; the condensation cycle outlet of the compressor is connected to the inlet of the condenser, and the outlet of the condenser is connected to the condensation cycle inlet of the compressor through the electronic expansion valve and the first channel;
[0007] The first water circuit module includes a first water pump. The outlet of the first water pump is connected to the coolant inlet of the battery cells in the battery through the second channel, and the inlet of the first water pump is connected to the coolant outlet of the battery cells to form a first water circuit;
[0008] The second water circuit module includes a natural cooling heat exchanger, a first three-way valve, a second three-way valve, and a second water pump. The inlet of the natural cooling heat exchanger is connected to the liquid outlet of the energy storage converter, the outlet of the natural cooling heat exchanger is respectively connected to the inlet of the first water pump and the first end of the first three-way valve, and the second end of the first three-way valve is connected to the liquid inlet of the energy storage converter to form a second water circuit; the third end of the first three-way valve is also connected to the coolant outlet of the battery cells through the channel formed by the first end and the second end of the second three-way valve.
[0009] Preferably, a first heat source unit is further provided in the battery, and the first heat source unit is disposed on the pipeline between the second channel and the coolant inlet of the battery cells.
[0010] Preferably, a second heat source unit is provided inside the energy storage converter, and the second heat source unit is disposed on the pipeline between the second end of the first three-way valve and the liquid inlet of the energy storage converter.
[0011] Preferably, the first heat source unit includes an electric heating device, and the first heat source unit is used to generate and transfer heat to the battery cells; the second heat source unit includes a cold plate, and the second heat source unit is used to transfer the heat generated by the energy storage converter to the second water circuit through the cold plate.
[0012] Preferably, a controller is further included, and the controller is electrically connected to the first three-way valve, the second three-way valve, the first water pump and the second water pump respectively, and is used to control the conduction of the first three-way valve and the second three-way valve, control the heat transfer of the first heat source unit and the second heat source unit, and control the start and stop of the first water pump and the second water pump.
[0013] Preferably, the first three-way valve and the second three-way valve each include an electric actuator electrically connected to the controller.
[0014] Preferably, the first water pump and the second water pump are respectively a centrifugal pump or a turbine pump electrically connected to the controller.
[0015] Preferably, the second water circuit module further includes an expansion tank, and the liquid discharge port of the expansion tank is connected to the pipeline between the outlet of the natural cooling heat exchanger and the inlet of the first water pump.
[0016] Preferably, the first water circuit module further includes a liquid replenishing tank and a first one-way valve, and the output port of the liquid replenishing tank is connected to the third end of the second three-way valve through the first one-way valve for liquid replenishment.
[0017] Preferably, an exhaust module is further included near the compressor, and the exhaust module is used for discharging the heat released when the compressor compresses the refrigerant and transports it to the condenser for condensation.
[0018] The present application provides a heat management unit and an energy storage system with a dual water circuit, and the beneficial effects are as follows:
[0019] By integrating the first and second waterway modules of the PCS and the battery cells into a single thermal management unit, the number of devices and the occupied space are reduced, and the compactness between devices is improved. The heat exchanger is used to achieve the heat exchange between the refrigerant and the coolant, reducing the dependence on external refrigeration equipment and lowering the energy consumption. In winter or low-temperature environments, the heat generated by the PCS can be recycled through the opening and closing of the three-way valve in the second waterway module to heat the battery cells, improving the energy utilization efficiency. The design of the three-way valve provides flexible water flow control, allowing the cooling strategy to be adjusted according to the actual heat load requirements of the PCS and the battery cells.
[0020] In summary, the thermal management unit with dual waterways mentioned in this application can achieve efficient cooling and heat energy recovery of the PCS and the battery cells in the energy storage system, reduce the number of devices and the occupied space, and improve the compactness between devices. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The drawings are only for the purpose of illustrating specific embodiments and are not considered to be a limitation of this application. Throughout the drawings, the same reference numerals represent the same components. Obviously, the drawings described below are only some of the embodiments described in the embodiments of this application, and those of ordinary skill in the art can obtain other drawings based on these drawings.
[0022] Figure 1 It is a schematic structural diagram of a thermal management unit, a battery, and an energy storage converter provided by an embodiment of this application.
[0023] Figure 2 It is a structural block diagram of a thermal management unit provided by an embodiment of this application.
[0024] Illustration: 10, refrigeration system module; 20, first waterway module; 30, second waterway module; 40, controller; 50, battery; 60, energy storage converter; 11, compressor; 12, condenser; 13, electronic expansion valve; 14, heat exchanger; 21, first water pump; 22, liquid replenishing tank; 23, first check valve; 31, natural cooling heat exchanger; 32, first three-way valve; 33, second three-way valve; 34, second water pump; 35, expansion tank. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] To enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts disclosed in the present application.
[0026] See Figure 1 and Figure 2 , this embodiment provides a thermal management unit with a dual water circuit. The thermal management unit includes: a refrigeration system module 10, a first water circuit module 20, and a second water circuit module 30;
[0027] The refrigeration system module 10 includes a compressor 11, a condenser 12, an electronic expansion valve 13, and a heat exchanger 14. The heat exchanger 14 has a first channel and a second channel for heat exchange with each other; the condensation cycle outlet of the compressor 11 is connected to the inlet of the condenser, and the outlet of the condenser is connected to the condensation cycle inlet of the compressor 11 through the electronic expansion valve 13 and the first channel;
[0028] The first water circuit module 20 includes a first water pump 21. The outlet of the first water pump 21 is connected to the coolant inlet of the battery cells in the battery 50 through the second channel, and the inlet of the first water pump 21 is connected to the coolant outlet of the battery cells to form a first water circuit;
[0029] The second water circuit module 30 includes a natural cooling heat exchanger 31, a first three-way valve 32, a second three-way valve 33, and a second water pump 34. The inlet of the natural cooling heat exchanger 31 is connected to the liquid outlet of the energy storage converter 60, and the outlet of the natural cooling heat exchanger 31 is respectively connected to the inlet of the first water pump 21 and the first end of the first three-way valve 32. The second end of the first three-way valve 32 is connected to the liquid inlet of the energy storage converter 60 to form a second water circuit; the third end of the first three-way valve 32 is also connected to the coolant outlet of the battery cells through the channel formed by the first end and the second end of the second three-way valve 33.
[0030] The thermal management unit may further include an exhaust air module. After the compressor 11 compresses the refrigerant, it is delivered to the condenser 12 for condensation. The heat released during the condensation process is carried away by the exhaust air module of the thermal management unit. The condensed refrigerant is throttled, depressurized, and cooled by the electronic expansion valve 13, and then enters the first channel of the heat exchanger 14. The first water pump 21 pumps water from the coolant outlet of the battery cell and delivers it to the second channel, where it exchanges heat with the refrigerant in the heat exchanger 14 to cool the battery cell. In the heat exchanger 14, the refrigerant exchanges heat with the liquid flowing through the second channel, absorbs the heat of the liquid, and cools down to achieve cooling. The cooled liquid flows back to the first water pump 21 again to form a circulating first water circuit for heat exchange of the battery cell.
[0031] The natural cooling heat exchanger 31 receives the liquid discharged from the energy storage converter 60 (PCS). The coolant flows in the natural cooling heat exchanger 31 and transfers the heat it carries to the condenser to achieve cooling of the PCS. The cooled coolant can flow back to the PCS for recirculation through the first three-way valve 32 and the second water pump 34, or, according to requirements, can be adjusted to flow to other parts by controlling the three-way valve. Therefore, the second water circuit module 30 forms a circulating second water circuit through the natural cooling heat exchanger 31, the first three-way valve 32, the second three-way valve 33, and the second water pump 34 for heat exchange of the PCS.
[0032] In specific applications, both the first three-way valve and the second three-way valve can respectively achieve the same flow control and switching functions through a combination of multiple two-way valves. They have equivalent effects and are both within the protection scope of this application.
[0033] Thus, by integrating the first water circuit module 20 and the second water circuit module 30 of the PCS and the battery cell into a thermal management unit, the number of devices and the occupied space are reduced, and the compactness between the devices is improved. The heat exchanger 14 is used to realize the heat exchange between the refrigerant and the coolant, reducing the dependence on external refrigeration equipment and lowering the energy consumption. In winter or low-temperature environments, the heat generated by the PCS can be recycled through the opening and closing of the three-way valve in the second water circuit module 30 to heat the battery cell, improving the energy utilization efficiency. The design of the three-way valve provides flexible water flow control, and the cooling strategy can be adjusted according to the actual heat load requirements of the PCS and the battery cell.
[0034] In summary, the thermal management unit with a dual water circuit mentioned in this application can achieve efficient cooling and heat energy recovery of the PCS and the battery cell in the energy storage system, reduce the number of devices and the occupied space, and improve the compactness between the devices.
[0035] In an exemplary embodiment, a first heat source unit is further provided in the battery 50, and the first heat source unit is disposed on the pipeline between the second channel and the coolant inlet of the battery cell. The first heat source unit includes an electric heating device, and the first heat source unit is configured to generate and transfer heat to the battery cell to the second waterway.
[0036] The first heat source unit is arranged on the pipeline where the coolant inlet of the battery cell is located. The electric heating device included in the first heat source unit functions to generate and transfer heat. This is because the discharge capacity, charge acceptance ability, and energy efficiency performance of the battery 50, including, will decline under low-temperature conditions. Heating the battery cell can improve its performance in a low-temperature environment.
[0037] In an exemplary embodiment, a second heat source unit is provided in the energy storage inverter 60, and the second heat source unit is disposed on the pipeline between the second end of the first three-way valve 32 and the liquid inlet of the energy storage inverter 60. The second heat source unit includes a cold plate, and the second heat source unit is configured to transfer the heat generated by the energy storage inverter 60 through the cold plate.
[0038] The second heat source unit is integrated inside the energy storage inverter 60, specifically disposed on the pipeline between the second end of the first three-way valve 32 and the liquid inlet of the energy storage inverter 60. The cold plate in the second heat source unit serves as a heat exchanger for absorbing and transferring the heat generated by the energy storage inverter 60. When the coolant flows through the second heat source unit, especially the cold plate, the cold plate absorbs the heat generated by the energy storage inverter 60, causing the temperature of the coolant to rise.
[0039] Thus, by providing a cold plate in front of the liquid inlet of the energy storage inverter 60, the heat generated by the energy storage inverter 60 can be more effectively absorbed and transferred, improving the heat exchange efficiency. Through effective thermal management, the performance degradation or damage of the energy storage inverter 60 caused by overheating can be prevented, thereby extending the service life of the device.
[0040] In an exemplary embodiment, a controller 40 is further included. The controller 40 is electrically connected to the first three-way valve 32, the second three-way valve 33, the first water pump 21, and the second water pump 34 respectively, and is configured to control the opening and closing of the first three-way valve 32 and the second three-way valve 33, control the heat transfer of the first heat source unit and the second heat source unit, and control the start and stop of the first water pump 21 and the second water pump 34. The first three-way valve 32 and the second three-way valve 33 each include an electric actuator electrically connected to the controller 40. The first water pump 21 and the second water pump 34 are respectively a centrifugal pump or a turbine pump electrically connected to the controller 40.
[0041] The controller 40 is electrically connected to the first three-way valve 32 and the second three-way valve 33, and can control the conduction states of the two three-way valves according to specific heat loads and cooling requirements, thereby regulating the flow direction of the coolant. The controller 40 also controls the start and stop of the first water pump 21 and the second water pump 34, and adjusts the flow rate and flow of the coolant as needed. Effective thermal management can prevent the equipment temperature from being outside the specified range and extend the service life of the battery cells and PCS. In a specific application, the controller 40 can be integrated with sensors and existing intelligent algorithms to real-time monitor parameters such as the temperature and pressure of the thermal management unit, battery, and energy storage converter, and automatically adjust the working states of the three-way valve and the water pump to ensure the efficient operation of the thermal management unit.
[0042] In an exemplary embodiment, the second waterway module 30 further includes an expansion tank 35, and a liquid discharge port of the expansion tank 35 is connected to a pipeline between an outlet of the natural cooling heat exchanger 31 and an inlet of the first water pump 21.
[0043] The liquid discharge port of the expansion tank 35 is connected to the pipeline between the outlet of the natural cooling heat exchanger 31 and the inlet of the first water pump 21. When working, the coolant expands when heated and its volume increases; when cooled, its volume will contract. The expansion tank 35 provides space to accommodate the volume change and helps maintain the pressure balance in the waterway, preventing pressure fluctuations caused by the volume change of the coolant.
[0044] In an exemplary embodiment, the first waterway module 20 further includes a liquid replenishing tank 22 and a first one-way valve 23, and an output port of the liquid replenishing tank 22 is connected to a third end of the second three-way valve 33 through the first one-way valve 23 for liquid replenishment.
[0045] The liquid replenishing tank 22 is used to store the coolant to make up for the reduction of the coolant volume due to evaporation, leakage or other reasons during the operation of the equipment. The first one-way valve 23 is installed on the pipeline between the output port of the liquid replenishing tank 22 and the third end of the second three-way valve 33 to ensure that the coolant can only flow from the liquid replenishing tank 22 to the waterway and prevent reverse flow. In a specific application, a pressure sensor can be provided on the first waterway. When the water pressure of the coolant is detected to be lower than the set value through the pressure sensor, the first one-way valve 23 opens, allowing the coolant in the liquid replenishing tank 22 to flow into the third end of the second three-way valve 33 through the one-way valve, and then replenishing it into the waterway.
[0046] Thus, the setting of the liquid replenishing tank 22 and the first one-way valve 23 realizes the automatic replenishment of the coolant, without manual intervention, avoiding unreliable behaviors in human operations, and improving the reliability of the thermal management unit.
[0047] As an example, a thermal management unit with a dual waterway is provided, including: a refrigeration system module, a first waterway module, and a second waterway module;
[0048] The refrigeration system module includes a compressor, a condenser, an electronic expansion valve, and a heat exchanger. The heat exchanger has a first channel and a second channel for heat exchange with each other. The condensation cycle outlet of the compressor is connected to the inlet of the condenser, and the outlet of the condenser is connected to the condensation cycle inlet of the compressor through the electronic expansion valve and the first channel.
[0049] The first water circuit module includes a first water pump. The outlet of the first water pump is connected to the coolant inlet of the battery cells through the second channel, and the inlet of the first water pump is connected to the coolant outlet of the cells to form a first water circuit. A first heat source unit is also provided in the battery. The first heat source unit is disposed on the pipeline between the second channel and the coolant inlet of the cells. The first water circuit module further includes a liquid replenishing tank and a first one-way valve. The output port of the liquid replenishing tank is connected to the third end of the second three-way valve through the first one-way valve for liquid replenishment.
[0050] The second water circuit module includes a natural cooling heat exchanger, a first three-way valve, a second three-way valve, and a second water pump. The inlet of the natural cooling heat exchanger is connected to the liquid outlet of the energy storage converter. The outlet of the natural cooling heat exchanger is respectively connected to the inlet of the first water pump and the first end of the first three-way valve. The second end of the first three-way valve is connected to the liquid inlet of the energy storage converter to form a second water circuit. The third end of the first three-way valve is also connected to the coolant outlet of the cells through the channel formed by the first end and the second end of the second three-way valve. A second heat source unit is provided in the energy storage converter. The second heat source unit is disposed on the pipeline between the second end of the first three-way valve and the liquid inlet of the energy storage converter. The first heat source unit includes an electric heating device and is used to generate and transfer heat to the cells. The second heat source unit includes a cold plate and is used to transfer the heat generated by the energy storage converter to the second water circuit through the cold plate.
[0051] The second water circuit module further includes an expansion tank. The liquid discharge port of the expansion tank is connected to the pipeline between the outlet of the natural cooling heat exchanger and the inlet of the first water pump.
[0052] The thermal management unit further includes a controller. The first three-way valve and the second three-way valve respectively include electric actuators electrically connected to the controller. The controller is electrically connected to the first three-way valve, the second three-way valve, the first water pump, and the second water pump respectively, and is used to control the conduction of the first three-way valve and the second three-way valve, control the heat transfer of the first heat source unit and the second heat source unit, and control the start and stop of the first water pump and the second water pump.
[0053] During the startup phase of the thermal management unit, the controller initializes the status of each component to ensure that all devices are ready. After the compressor starts, the refrigerant exits the compressor and enters the condenser for condensation. During this process, a large amount of heat is released and carried away by the exhaust module of the thermal management unit. The condensed refrigerant becomes liquid, flows through the electronic expansion valve for throttling, and enters the evaporator part of the heat exchanger. Here, the refrigerant exchanges heat with the coolant in the second channel and absorbs heat. The first water pump operates to suck the coolant from the coolant outlet of the battery cell and transports it through the second channel to the coolant inlet of the battery cell, forming the first water circuit. The coolant absorbs the heat generated by the battery cell and then returns to the first water pump to cool the battery cell in a cycle.
[0054] When the heat generated by the PCS needs to be utilized and the battery cell needs to be heated, part of the coolant returning from the battery cell flows through the second three-way valve and the first three-way valve into the second water pump, and then into the PCS for heat exchange. After passing through the natural cooling heat exchanger, part of the coolant returns to the first water pump, and part flows into the liquid inlet of the PCS. In the heating mode controlled by the controller, the coolant returning from the battery cell flows into the PCS through the two three-way valves, and uses the heat generated by the PCS to heat the battery cell, achieving two-way energy saving.
[0055] The controller monitors the water pressure in the water circuit. When low water pressure is detected, the controller opens the first check valve to supplement the coolant from the replenishment tank into the system. At the same time, as the temperature of the coolant changes, the expansion tank absorbs or releases the coolant to maintain the stability of the water pressure in the water circuit.
[0056] The controller adjusts the electric actuators of the first three-way valve and the second three-way valve according to the real-time data, controls the flow direction of the coolant, and controls the start and stop of the first water pump and the second water pump to ensure the efficient operation of the thermal management unit.
[0057] Thus, by controlling the flow direction and quantity of the coolant, the heat generated by the battery cell and the PCS can be efficiently managed. Using the heat generated by the PCS to heat the battery cell reduces the demand for external heat sources and realizes the reuse of energy. The automatic control of the controller reduces manual intervention, and the design of the expansion tank and the replenishment tank ensures the stability and continuous operation of the system under different working conditions.
[0058] It can be understood that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application. Any changes or replacements that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered within the protection scope of the present application.
Claims
1. A thermal management unit with dual water circuits, characterized in that: include: A refrigeration system module, a first water circuit module and a second water circuit module; The refrigeration system module includes a compressor, a condenser, an electronic expansion valve and a heat exchanger, wherein the heat exchanger has a first channel and a second channel for mutual heat exchange; the condensation cycle outlet of the compressor is connected to the inlet of the condenser, and the outlet of the condenser is connected to the condensation cycle inlet of the compressor through the electronic expansion valve and the first channel; The first water circuit module includes a first water pump, the outlet of the first water pump is connected to the coolant inlet of the battery cell in the battery through the second channel, and the inlet of the first water pump is connected to the coolant outlet of the battery cell to form a first water circuit; The second water circuit module includes a natural cooling heat exchanger, a first three-way valve, a second three-way valve and a second water pump. The inlet of the natural cooling heat exchanger is connected to the liquid outlet of the energy storage inverter, and the outlet of the natural cooling heat exchanger is respectively connected to the inlet of the first water pump and the first end of the first three-way valve. The second end of the first three-way valve is connected to the liquid inlet of the energy storage inverter to form a second water circuit; the third end of the first three-way valve is also connected to the coolant outlet of the battery cell through a channel formed by the first end and the second end of the second three-way valve.
2. The thermal management unit with dual water circuits according to claim 1, characterized in that: The battery is further provided with a first heat source unit, and the first heat source unit is arranged on a pipeline between the second channel and a coolant inlet of the battery cell.
3. The thermal management unit with dual water circuits according to claim 2, characterized in that: A second heat source unit is provided in the energy storage converter, and the second heat source unit is arranged on a pipeline between the second end of the first three-way valve and the liquid inlet of the energy storage converter.
4. The thermal management unit with dual water circuits according to claim 3, characterized in that: The first heat source unit includes an electric heating device, and the first heat source unit is used to generate and transfer heat to the battery core; the second heat source unit includes a cold plate, and the second heat source unit is used to transfer the heat generated by the energy storage inverter to the second water channel through the cold plate.
5. The thermal management unit with dual water circuits according to claim 4, characterized in that: It also includes a controller, which is electrically connected to the first three-way valve, the second three-way valve, the first water pump and the second water pump, respectively, and is used to control the conduction of the first three-way valve and the second three-way valve, control the heat transfer of the first heat source unit and the second heat source unit, and control the start and stop of the first water pump and the second water pump.
6. The thermal management unit with dual water circuits according to claim 5, characterized in that: The first three-way valve and the second three-way valve respectively include an electric actuator electrically connected to the controller.
7. The thermal management unit with dual water circuits according to claim 5, characterized in that: The first water pump and the second water pump are centrifugal pumps or turbine pumps electrically connected to the controller, respectively.
8. The thermal management unit with dual water circuits according to claim 1, characterized in that: The second water circuit module further includes an expansion tank, and a liquid discharge port of the expansion tank is connected to a pipeline between an outlet of the natural cooling heat exchanger and an inlet of the first water pump.
9. The thermal management unit with dual water circuits according to claim 1, characterized in that: The first water channel module also includes a liquid replenishing tank and a first one-way valve. The output port of the liquid replenishing tank is connected to the third end of the second three-way valve through the first one-way valve for liquid replenishment.
10. The thermal management unit with dual water circuits according to claim 1, characterized in that: It also includes an exhaust module arranged near the compressor, and the exhaust module is used to discharge the heat released when the compressor compresses the refrigerant and transmits it to the condenser for condensation.