Dual-temperature-zone liquid-cooled thermal management system, operation method of thermal management system, and vehicle

Abstract

The present invention discloses a dual-temperature liquid-cooled thermal management system, an operation method of the thermal management system, and a vehicle, which includes a refrigeration module, a main thermal management flow channel, and a battery pack thermal management flow channel; the main thermal management flow channel and the battery pack thermal management flow channel can selectively form independent liquid-cooled medium cycles, and the main thermal management flow channel and the battery pack thermal management flow channel can also selectively form a liquid-cooled medium cycle in series; the main thermal management flow channel can bypass the radiator and cut it into or out of the liquid-cooled medium cycle; the main thermal management flow channel can branch the liquid-cooled medium channel of the condenser of the refrigeration module into or out of the liquid-cooled medium cycle; the present invention can provide multiple operation modes, while taking energy conservation into account, meeting the thermal management requirements of the vehicle under various working conditions, and having excellent thermal management performance, rich and easy-to-control functional modes, high integration, and low energy consumption characteristics.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive thermal management systems, and specifically provides a dual-temperature-zone liquid-cooled thermal management system, an operation method of the thermal management system, and a vehicle. Background Art

[0002] For new energy vehicles driven by an electric motor (as one of the driving forces), a large amount of heat is generated by the battery pack, the motor, and the controller. Heat dissipation is required in high-temperature environments; otherwise, the performance, safety, and lifespan of the new energy vehicle will be affected. In low-temperature environments, the battery life of the battery pack is extremely vulnerable to being affected. Therefore, in low-temperature environments, heat preservation / heating treatment needs to be performed on the battery pack of the new energy vehicle.

[0003] Based on the above considerations, new energy vehicles usually configure a thermal management system to achieve temperature control of the above-mentioned components. Among them, the liquid-cooled thermal management system is a thermal management system solution widely used in the field of new energy vehicles.

[0004] For new energy vehicles in the prior art, some configure independent thermal management systems (at least including multiple refrigeration devices and multiple liquid-cooled water circuits) for the battery pack, the motor, and the controller respectively. Obviously, this will cause problems such as excessive energy consumption, high system complexity, and excessive vehicle weight. There are also some new energy vehicles that use a set of refrigeration devices as the core of the thermal management system and configure independent liquid-cooled water circuits for components such as the battery pack, the motor, and the controller. Although it can reduce energy consumption and vehicle weight to a certain extent, its system complexity has not been effectively reduced, and it still has high energy consumption and vehicle weight.

[0005] In summary, how to provide a thermal management system for new energy vehicles with excellent thermal management performance, rich and easy-to-control functional modes, high integration, and low energy consumption has become an urgent problem to be solved. Summary of the Invention

[0006] The purpose of the present invention is to provide a dual-temperature-zone liquid-cooled thermal management system, an operation method of the thermal management system, and a vehicle, which have the characteristics of excellent thermal management performance, rich and easy-to-control functional modes, high integration, and low energy consumption.

[0007] To achieve the above object, the present invention provides the following technical solution: A dual-temperature liquid-cooled thermal management system is applied to a vehicle, and the vehicle includes a battery pack and at least one electric energy conversion component; it includes a refrigeration module, a main thermal management flow channel, and a battery pack thermal management flow channel; the refrigeration module includes a compressor, a condenser, a throttling device, and an evaporation heat exchanger, and the refrigerant channels of the compressor, the condenser, the throttling device, and the evaporation heat exchanger are sequentially circulated and connected, so that the refrigerant can circulate in the refrigerant channels of the compressor, the condenser, the throttling device, and the evaporation heat exchanger; the main thermal management flow channel includes a first circulation pump, a main flow channel heat exchanger, a radiator water tank with a fan, and a branch switching valve, and the main flow channel heat exchanger can exchange heat with the electric energy conversion component of the vehicle, and the liquid cooling medium channels of the first circulation pump, the main flow channel heat exchanger, the radiator water tank, and the branch switching valve are sequentially circulated and connected; the battery pack thermal management flow channel includes a second circulation pump and a battery pack heat exchanger, and the battery pack heat exchanger can exchange heat with the battery pack of the vehicle, and the liquid cooling medium channels of the second circulation pump, the battery pack heat exchanger, the branch switching valve of the main thermal management flow channel, and the evaporation heat exchanger of the refrigeration module are sequentially circulated and connected; under the control of the branch switching valve of the main thermal management flow channel, the main thermal management flow channel and the battery pack thermal management flow channel can selectively form independent liquid cooling medium cycles, and moreover, the main thermal management flow channel and the battery pack thermal management flow channel can also selectively form a liquid cooling medium cycle in series; the main thermal management flow channel can cut the radiator water tank into or out of the liquid cooling medium cycle in a bypass manner; the main thermal management flow channel can connect or cut out the liquid cooling medium channel of the condenser of the refrigeration module in a branch manner.

[0008] In the above technical solution, the branch switching valve of the main thermal management flow channel is a four-way valve, which includes a port a, a port b, a port c, and a port d that are controlled by a host computer to open / close; the port a of the branch switching valve is connected to the battery pack heat exchanger of the battery pack thermal management flow channel, and the port d of the branch switching valve is connected to the liquid cooling medium channel of the evaporation heat exchanger of the refrigeration module; the port b of the branch switching valve is connected to the first circulation pump of the main thermal management flow channel, and the port c of the branch switching valve is connected to the radiator water tank of the main thermal management flow channel.

[0009] In the above technical solution, the main thermal management flow channel further includes a first bypass switching valve; the first bypass switching valve can cut the radiator water tank into or out of the liquid cooling medium cycle in a bypass manner.

[0010] In the above technical solution, the first bypass switching valve of the main heat management flow channel is a three-way valve, which includes a port a, a port b, and a port c that are controlled by a host computer to open / close; the port a of the first bypass switching valve is connected to the radiator water tank, the port c of the first bypass switching valve is connected to the main flow channel heat exchanger, and the port b of the first bypass switching valve is connected to the branch switching valve.

[0011] In the above technical solution, the main heat management flow channel further includes a second bypass switching valve and a one-way valve; the second bypass switching valve includes two ports that are controlled by a host computer to open / close; the two ports of the second bypass switching valve are respectively connected to the outlet end of the radiator water tank and the inlet end of the liquid cooling medium channel of the condenser of the refrigeration module; the two ports of the one-way valve are respectively connected to the outlet end of the liquid cooling medium channel of the condenser of the refrigeration module and the inlet end of the radiator water tank.

[0012] In the above technical solution, the battery pack heat management flow channel further includes a heater for heating the liquid cooling medium.

[0013] In the above technical solution, the dual-temperature zone liquid-cooled type heat management system of the present invention further includes a first temperature sensor connected to the inlet end of the radiator water tank of the main heat management flow channel, a second temperature sensor connected to the inlet end of the battery pack heat exchanger of the battery pack heat management flow channel, a third temperature sensor connected to the outlet end of the battery pack heat exchanger of the battery pack heat management flow channel, and a fourth temperature sensor connected to the inlet end of the main flow channel heat exchanger of the main heat management flow channel.

[0014] An operation method of a heat management system is applied to the above dual-temperature zone liquid-cooled type heat management system; the method includes:

[0015] According to at least one working condition signal of the vehicle and / or the dual-temperature zone liquid-cooled type heat management system, selectively enter one of the following operation modes:

[0016] Compressor refrigeration mode: Start the compressor and throttling device of the refrigeration module, and start the fan of the radiator water tank. The main heat management flow channel and the battery pack heat management flow channel form independent liquid cooling medium cycles; the liquid cooling medium of the main heat management flow channel absorbs the heat of the electric energy conversion component through the main flow channel heat exchanger and dissipates heat at the radiator water tank; the liquid cooling medium of the battery pack heat management flow channel absorbs the heat of the battery pack through the battery pack heat exchanger and dissipates heat at the evaporation heat exchanger of the refrigeration module; the main heat management flow channel connects the liquid cooling medium channel of the condenser of the refrigeration module to the liquid cooling medium cycle in a branch manner.

[0017] Water tank heat dissipation mode: Stop the compressor and throttling device of the refrigeration module, and start the fan of the heat dissipation water tank. The main heat management flow channel and the battery pack heat management flow channel form a liquid cooling medium circulation in series; the liquid cooling medium in the main heat management flow channel absorbs the heat of the electric energy conversion component through the main flow channel heat exchanger and dissipates heat at the heat dissipation water tank; the liquid cooling medium in the battery pack heat management flow channel absorbs the heat of the battery pack through the battery pack heat exchanger and dissipates heat at the heat dissipation water tank of the main heat management flow channel; the liquid cooling medium channel of the condenser of the refrigeration module is cut out of the liquid cooling medium circulation;

[0018] Waste heat utilization mode: Stop the compressor and throttling device of the refrigeration module, and stop the fan of the heat dissipation water tank. The main heat management flow channel and the battery pack heat management flow channel form a liquid cooling medium circulation in series; the liquid cooling medium in the main heat management flow channel absorbs the heat of the electric energy conversion component through the main flow channel heat exchanger and transfers the heat to the battery pack through the battery pack heat exchanger of the battery pack heat management flow channel; the main heat management flow channel bypasses the heat dissipation water tank and cuts it out of the liquid cooling medium circulation; the liquid cooling medium channel of the condenser of the refrigeration module is cut out of the liquid cooling medium circulation;

[0019] Battery self-circulation mode / battery heat preservation mode: Stop the compressor and throttling device of the refrigeration module, and stop the fan of the heat dissipation water tank. The liquid cooling medium circulation in the main heat management flow channel is also stopped; the battery pack heat management flow channel forms an independent liquid cooling medium circulation;

[0020] Standby mode: Stop the compressor and throttling device of the refrigeration module, and stop the fan of the heat dissipation water tank. The liquid cooling medium circulations in both the main heat management flow channel and the battery pack heat management flow channel are stopped.

[0021] In the above technical solution, when entering the compression refrigeration mode: the a port and the d port of the branch switching valve of the main heat management flow channel are connected, the b port and the c port of the branch switching valve of the main heat management flow channel are connected, and the a port and the c port of the first bypass switching valve are connected, so that the main heat management flow channel and the battery pack heat management flow channel form independent liquid cooling medium circulations; the second bypass switching valve is opened, so that the main heat management flow channel bypasses and accesses the liquid cooling medium channel of the condenser of the refrigeration module into the liquid cooling medium circulation;

[0022] When entering the water tank heat dissipation mode: the c port and the d port of the branch switching valve of the main heat management flow path are connected, the a port and the b port of the branch switching valve of the main heat management flow path are connected, and the a port and the c port of the first bypass switching valve are connected, so that the main heat management flow path and the battery pack heat management flow path form a liquid cooling medium circulation in series; the second bypass switching valve is closed, so that the liquid cooling medium channel of the condenser of the refrigeration module is cut out of the liquid cooling medium circulation;

[0023] When entering the waste heat utilization mode: the c port and the d port of the branch switching valve of the main heat management flow path are connected, the a port and the b port of the branch switching valve of the main heat management flow path are connected, and the b port and the c port of the first bypass switching valve are connected, so that the main heat management flow path and the battery pack heat management flow path form a liquid cooling medium circulation in series, and the water tank for heat dissipation is cut out of the liquid cooling medium circulation; the second bypass switching valve is closed, so that the liquid cooling medium channel of the condenser of the refrigeration module is cut out of the liquid cooling medium circulation;

[0024] When entering the battery self-circulation mode / the battery heat preservation mode: the a port and the d port of the branch switching valve of the main heat management flow path are connected, and the b port and the c port of the branch switching valve of the main heat management flow path are closed, so that the liquid cooling medium circulation of the main heat management flow path is stopped, and the battery pack heat management flow path forms an independent liquid cooling medium circulation.

[0025] A vehicle includes the above-mentioned dual-temperature zone liquid cooling type heat management system.

[0026] Compared with the prior art, the beneficial effects of the present invention are: the dual-temperature zone liquid cooling type heat management system, the operation method of the heat management system and the vehicle of the present invention can selectively form independent liquid cooling medium circulations for the main heat management flow path and the battery pack heat management flow path under the control of the branch switching valve of the main heat management flow path. The main heat management flow path and the battery pack heat management flow path can also selectively form a liquid cooling medium circulation in series. The main heat management flow path can cut the water tank for heat dissipation into or out of the liquid cooling medium circulation in a bypass manner, and the main heat management flow path can connect or cut out the liquid cooling medium channel of the condenser of the refrigeration module into or out of the liquid cooling medium circulation in a branch manner; it can provide at least multiple operation modes such as the compressor refrigeration mode, the water tank heat dissipation mode, the waste heat utilization mode, the battery self-circulation mode, the battery heat preservation mode and the standby mode. While taking energy conservation into account, it meets the heat management requirements of the vehicle under various working conditions, and has excellent heat management performance, rich and easy-to-control functional modes, high integration and low energy consumption. Description of the Drawings

[0027] Figure 1 It is a system structure view of the present invention.

[0028] Figure 2 It is a schematic diagram of the refrigerant circulation and liquid cooling medium circulation in the compressor refrigeration mode of the present invention.

[0029] Figure 3 It is a schematic diagram of the liquid cooling medium circulation in the water tank heat dissipation mode of the present invention.

[0030] Figure 4 It is a schematic diagram of the liquid cooling medium circulation in the waste heat utilization mode of the present invention.

[0031] Figure 5 It is a schematic diagram of the circulation of the liquid cooling medium in the battery self-circulation mode / battery heat preservation mode of the present invention.

[0032] The accompanying drawings are marked as follows: 100, battery pack; 200, electric energy conversion component; 11, compressor; 12, condenser; 13, throttling device; 14, evaporative heat exchanger; 21, first circulation pump; 22, main channel heat exchanger; 23, cooling water tank; 231, fan; 24, branch switching valve; 25, first bypass switching valve; 26, second bypass switching valve; 27, one-way valve; 31, second circulation pump; 32, battery pack heat exchanger; 33, heater; TT1, first temperature sensor; TT2, second temperature sensor; TT3, third temperature sensor; TT4, fourth temperature sensor. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] The present embodiment provides a dual-temperature zone liquid-cooled thermal management system, which is applied to vehicles (especially new energy vehicles that use battery packs to store energy and use motors as (one of) the driving forces).

[0035] The vehicle includes a battery pack 100 and at least one power conversion component 200. The battery pack 100 is usually a lithium-ion battery pack 100. The power conversion component 200 can be a motor or a controller (i.e., a motor driver). In this embodiment, the power conversion component 200 is a motor, a vehicle controller (MCU), and an all-in-one controller integrated in the same module.

[0036] See also Figure 1 The dual-temperature zone liquid cooling type thermal management system of this embodiment includes a refrigeration module, a main thermal management channel 2 and a battery pack thermal management channel 3.

[0037] The refrigeration module includes a compressor 11, a condenser 12, a throttling device 13, and an evaporative heat exchanger 14. Among them, the compressor 11 is a compressor for compressing refrigerant in the refrigeration system, preferably a variable-frequency compressor. The condenser 12 is a condenser in the refrigeration system, specifically a water condenser, that is, the condenser 12 has a liquid-cooling medium channel and can dissipate heat through the liquid-cooling medium. Air convection devices such as fans are optional configurations for the condenser 12. The throttling device 13 is a throttling component in the refrigeration system, preferably an electronic expansion valve. The evaporative heat exchanger 14 is a metal heat exchanger provided with a refrigerant evaporation structure and is used as an evaporator in the refrigeration system. Moreover, the evaporative heat exchanger 14 has a liquid-cooling medium channel and can cool the liquid-cooling medium flowing through its liquid-cooling medium channel to a low temperature. The refrigerant channels of the compressor 11, the condenser 12, the throttling device 13, and the evaporative heat exchanger 14 are sequentially and circularly connected, enabling the refrigerant to circulate in the refrigerant channels of the compressor 11, the condenser 12, the throttling device 13, and the evaporative heat exchanger 14. With this configuration, the refrigeration function of the refrigeration module can be achieved.

[0038] The main heat management flow channel 2 includes a first circulation pump 21, a main flow channel heat exchanger 22, a radiator tank 23 with a fan 231, and a branch switching valve 24. Among them, the first circulation pump 21 is a dedicated circulation pump for the liquid-cooling medium, such as an electric water pump. The main flow channel heat exchanger 22 can exchange heat with the electrical energy conversion component 200 of the vehicle. In some possible embodiments, the main flow channel heat exchanger 22 is a liquid-cooling medium heat exchanger built into the electrical energy conversion component 200. In some other possible embodiments, the main flow channel heat exchanger 22 is a liquid-cooling medium heat exchange plate attached to the surface of the electrical energy conversion component 200. The radiator tank 23 is a metal cooler with multiple liquid flow channels, and heat dissipation fins are provided between each liquid flow channel. It can dissipate heat from the liquid-cooling medium flowing through itself through forced convection or natural convection. The liquid-cooling medium channels of the first circulation pump 21, the main flow channel heat exchanger 22, the radiator tank 23, and the branch switching valve 24 are sequentially and circularly connected.

[0039] The battery pack heat management flow channel 3 includes a second circulation pump 31 and a battery pack heat exchanger 32. Among them, the second circulation pump 31 is a dedicated circulation pump for the liquid-cooling medium, such as an electric water pump. The battery pack heat exchanger 32 can exchange heat with the battery pack 100 of the vehicle. In some possible embodiments, the battery pack heat exchanger 32 is a liquid-cooling medium heat exchanger built into the battery pack 100. In some other possible embodiments, the battery pack heat exchanger 32 is a liquid-cooling medium heat exchange plate attached to the surface of the battery pack 100. The liquid-cooling medium channels of the second circulation pump 31, the battery pack heat exchanger 32, the branch switching valve 24 of the main heat management flow channel 2, and the evaporative heat exchanger 14 of the refrigeration module are sequentially and circularly connected.

[0040] Under the control of the branch switching valve 24 of the main heat management runner 2, the main heat management runner 2 and the battery pack heat management runner 3 can selectively form independent liquid cooling medium cycles, and moreover, the main heat management runner 2 and the battery pack heat management runner 3 can also selectively form a liquid cooling medium cycle in series; the main heat management runner 2 can, in a bypass manner, cut the radiator tank 23 into or out of the liquid cooling medium cycle; the main heat management runner 2 can, in a branch manner, connect or cut off the liquid cooling medium channel of the condenser 12 of the refrigeration module from the liquid cooling medium cycle.

[0041] Specifically, the branch switching valve 24 of the main heat management runner 2 is a four-way valve, specifically an electrically controlled four-way valve, such as an electric four-way valve or a magnetically controlled four-way valve, which includes an a port, a b port, a c port, and a d port that are controlled by a host computer (such as a vehicle controller, a programmable controller, and an embedded system) to open / close; the a port of the branch switching valve 24 is connected to the battery pack heat exchanger 32 of the battery pack heat management runner 3, and the d port of the branch switching valve 24 is connected to the liquid cooling medium channel of the evaporation heat exchanger 14 of the refrigeration module; the b port of the branch switching valve 24 is connected to the first circulation pump 21 of the main heat management runner 2, and the c port of the branch switching valve 24 is connected to the radiator tank 23 of the main heat management runner 2.

[0042] Specifically, the main heat management runner 2 further includes a first bypass switching valve 25, and the first bypass switching valve 25 can, in a bypass manner, cut the radiator tank 23 into or out of the liquid cooling medium cycle.

[0043] More specifically, the first bypass switching valve 25 of the main heat management runner 2 is a three-way valve, specifically an electrically controlled three-way valve, such as an electric three-way valve or a magnetically controlled three-way valve, which includes an a port, a b port, and a c port that are controlled by a host computer (such as a vehicle controller, a programmable controller, and an embedded system) to open / close; the a port of the first bypass switching valve 25 is connected to the radiator tank 23, the c port of the first bypass switching valve 25 is connected to the main runner heat exchanger 22, and the b port of the first bypass switching valve 25 is connected to the branch switching valve 24.

[0044] Specifically, the main heat management runner 2 further includes a second bypass switching valve 26 and a check valve 27; among them, the second bypass switching valve 26 is specifically an electrically controlled valve, such as an electric valve or a magnetically controlled valve, which includes two ports that are controlled by a host computer (such as a vehicle controller, a programmable controller, and an embedded system) to open / close; the check valve 27 is a mechanical one-way liquid valve or an electrically controlled one-way liquid valve for preventing liquid backflow; the two ports of the second bypass switching valve 26 are respectively connected to the outlet end of the radiator tank 23 and the inlet end of the liquid cooling medium channel of the condenser 12 of the refrigeration module; the two ports of the check valve 27 are respectively connected to the outlet end of the liquid cooling medium channel of the condenser 12 of the refrigeration module and the inlet end of the radiator tank 23.

[0045] Further, the battery pack thermal management flow channel 3 further includes a heater 33 for heating the liquid cooling medium. The heater 33 is a vehicle water heater (WPTC), which is connected between the second circulation pump 31 and the battery pack heat exchanger 32 of the battery pack thermal management flow channel 3.

[0046] Further, the dual-temperature liquid-cooled thermal management system of this embodiment further includes a first temperature sensor TT1 (for detecting the outlet water temperature of the main flow channel heat exchanger 22) connected to the inlet end of the radiator tank 23 of the main thermal management flow channel 2, a second temperature sensor TT2 (for detecting the inlet water temperature of the battery pack heat exchanger 32) connected to the inlet end of the battery pack heat exchanger 32 of the battery pack thermal management flow channel 3, a third temperature sensor TT3 (for detecting the outlet water temperature of the battery pack heat exchanger 32) connected to the outlet end of the battery pack heat exchanger 32 of the battery pack thermal management flow channel 3, and a fourth temperature sensor TT4 (for detecting the inlet water temperature of the main flow channel heat exchanger 22) connected to the inlet end of the main flow channel heat exchanger 22 of the main thermal management flow channel 2; it can be understood that the first temperature sensor TT1, the second temperature sensor TT2, the third temperature sensor TT3, and the fourth temperature sensor TT4 are all water temperature sensors.

[0047] It can be understood that the dual-temperature liquid-cooled thermal management system of this embodiment is configured with a host computer (the vehicle control unit (VCU) in this embodiment); the actuators of the throttling device 13 of the refrigeration module, the branch switching valve 24, the first bypass switching valve 25, and the second bypass switching valve 26 of the main thermal management flow channel 2 are all connected to the host computer through the LIN bus to realize signal connection; the compressor 11 of the refrigeration module and the heater 33 of the battery pack thermal management flow channel 3 are all connected to the host computer through the CAN bus to realize signal connection; the first circulation pump 21 and the fan 231 of the main thermal management flow channel 2, the second circulation pump 31 of the battery pack thermal management flow channel 3, the first temperature sensor TT1, the second temperature sensor TT2, the third temperature sensor TT3, and the fourth temperature sensor TT4 are all connected to the host computer through dedicated signal lines to realize signal connection.

[0048] It can be understood that the host computer can also be signal-connected to the battery management system (BMS) of the battery pack 100, for example, through the CAN bus, to obtain information such as the cell temperature, remaining power, and charge / discharge mode of the battery pack 100.

[0049] This embodiment also provides an operation method of the thermal management system, which is applied to the above-mentioned dual-temperature liquid-cooled thermal management system. The method includes:

[0050] According to at least one condition signal of the vehicle and / or the dual-temperature liquid-cooled thermal management system, selectively enter one of the following operation modes:

[0051] The compressor 11 in the refrigeration mode (as Figure 2 shown): Start the compressor 11 and the throttling device 13 of the refrigeration module, and start the fan 231 of the radiator water tank 23. The main heat management flow channel 2 and the battery pack heat management flow channel 3 form independent liquid cooling medium cycles; the liquid cooling medium in the main heat management flow channel 2 absorbs the heat of the electric energy conversion component 200 through the main flow channel heat exchanger 22 and dissipates heat at the radiator water tank 23; the liquid cooling medium in the battery pack heat management flow channel 3 absorbs the heat of the battery pack 100 through the battery pack heat exchanger 32 and dissipates heat at the evaporation heat exchanger 14 of the refrigeration module; the liquid cooling medium channel of the condenser 12 of the refrigeration module is connected to the liquid cooling medium cycle in a branch manner.

[0052] In this embodiment, the refrigeration mode of the compressor 11 is applicable when the temperature of the battery pack 100 is relatively high (for example, when the battery pack 100 is charged by fast charging technology, when the core temperature of the battery pack 100 exceeds the alarm temperature, or in extremely high temperature weather); at this time, the first circulation pump 21 of the main heat management flow channel 2 and the second circulation pump 31 of the battery pack heat management flow channel 3 are both started, and the refrigerant is circulated by driving the compressor 11 of the refrigeration module. The liquid cooling medium in the battery pack heat management flow channel 3 can be quickly cooled through the evaporation heat exchanger 14, and then the battery pack 100 can be quickly cooled through the battery pack heat exchanger 32, ensuring that the battery pack 100 can complete heat management at the fastest rate. The frequency of the compressor 11 and the opening degree of the throttling device 13 of the refrigeration module will be controlled according to the cores of the battery pack 100; at the same time, through the radiator water tank 23 (using the fan 231 for forced convection heat dissipation), the electric energy conversion component 200 can be cooled separately.

[0053] The water tank heat dissipation mode (as Figure 3 shown): Stop the compressor 11 and the throttling device 13 of the refrigeration module, and start the fan 231 of the radiator water tank 23. The main heat management flow channel 2 and the battery pack heat management flow channel 3 form a liquid cooling medium cycle in series; the liquid cooling medium in the main heat management flow channel 2 absorbs the heat of the electric energy conversion component 200 through the main flow channel heat exchanger 22 and dissipates heat at the radiator water tank 23; the liquid cooling medium in the battery pack heat management flow channel 3 absorbs the heat of the battery pack 100 through the battery pack heat exchanger 32 and dissipates heat at the radiator water tank 23 of the main heat management flow channel 2; the liquid cooling medium channel of the condenser 12 of the refrigeration module is cut out from the liquid cooling medium cycle.

[0054] In this embodiment, the water tank heat dissipation mode is applicable when the temperature of the battery pack 100 is relatively high (for example, when the battery pack 100 is charged by slow charging technology, in high temperature weather, or when driving in moderate temperature). At this time, both the first circulation pump 21 of the main heat management flow channel 2 and the second circulation pump 31 of the battery pack heat management flow channel 3 are started, or either one is started. Through the radiator water tank 23 (with the fan 231 for forced convection heat dissipation), it is possible to dissipate heat for both the battery pack 100 and the power conversion component 200 simultaneously. This not only realizes the thermal management of both the battery pack 100 and the power conversion component 200, but also has a better energy-saving effect.

[0055] The waste heat utilization mode (as Figure 4 shown): Stop the compressor 11 and the throttling device 13 of the refrigeration module, and stop the fan 231 of the radiator water tank 23. The main heat management flow channel 2 and the battery pack heat management flow channel 3 form a liquid cooling medium circulation in series. The liquid cooling medium of the main heat management flow channel 2 absorbs the heat of the power conversion component 200 through the main flow channel heat exchanger 22, and transfers the heat to the battery pack 100 through the battery pack heat exchanger 32 of the battery pack heat management flow channel 3. The main heat management flow channel 2 cuts out the radiator water tank 23 from the liquid cooling medium circulation in a bypass manner. The liquid cooling medium channel of the condenser 12 of the refrigeration module is cut out from the liquid cooling medium circulation.

[0056] In this embodiment, the waste heat utilization mode is applicable when the temperature of the battery pack 100 is relatively low (for example, in low temperature weather, or when driving in low temperature weather). At this time, both the first circulation pump 21 of the main heat management flow channel 2 and the second circulation pump 31 of the battery pack heat management flow channel 3 are started, or either one is started. The waste heat generated by the power conversion component 200 is used to heat / insulate the battery pack 100, ensuring the normal operation of the battery pack 100 and improving the battery life of the battery pack 100 in a low temperature environment. At the same time, the waste heat generated by the power conversion component 200 is effectively utilized. The main heat management flow channel 2 cuts out the radiator water tank 23 from the liquid cooling medium circulation in a bypass manner, which can avoid the loss of heat of the liquid cooling medium at the radiator water tank 23. The heater 33 of the battery pack heat management flow channel 3 can be selectively started to heat the liquid cooling medium, and further heat / insulate the battery pack 100.

[0057] The battery self-circulation mode / battery insulation mode (as Figure 5 shown): Stop the compressor 11 and the throttling device 13 of the refrigeration module, and stop the fan 231 of the radiator water tank 23. The liquid cooling medium circulation of the main heat management flow channel 2 is also stopped. The battery pack heat management flow channel 3 forms an independent liquid cooling medium circulation.

[0058] In this embodiment, the waste heat utilization mode is applicable when the temperature of the battery pack 100 is relatively low (for example, in low-temperature weather or when the vehicle idles in low-temperature weather), or when it is necessary to balance the temperature difference between different battery cells of the battery pack 100; at this time, only the second circulation pump 31 of the thermal management flow channel is started, and the energy consumption is relatively low; the heater 33 of the battery pack thermal management flow channel 3 can be selectively started to heat the liquid cooling medium, and then further heat / insulate the battery pack 100.

[0059] Standby mode: Stop the compressor 11 and the throttling device 13 of the refrigeration module, and stop the fan 231 of the radiator 23. The liquid cooling medium circulation of the main thermal management flow channel 2 and the liquid cooling medium circulation of the battery pack thermal management flow channel 3 are both stopped.

[0060] Specifically, when entering the compressor 11 refrigeration mode (as Figure 2 shown): The a port and the d port of the branch switching valve 24 of the main thermal management flow channel 2 are connected, the b port and the c port of the branch switching valve 24 of the main thermal management flow channel 2 are connected, and the a port and the c port of the first bypass switching valve 25 are connected, so that the main thermal management flow channel 2 and the battery pack thermal management flow channel 3 form independent liquid cooling medium circulations; the second bypass switching valve 26 is opened, so that the main thermal management flow channel 2 connects the liquid cooling medium channel of the condenser 12 of the refrigeration module to the liquid cooling medium circulation in a branch manner;

[0061] When entering the water tank heat dissipation mode (as Figure 3 shown): The c port and the d port of the branch switching valve 24 of the main thermal management flow channel 2 are connected, the a port and the b port of the branch switching valve 24 of the main thermal management flow channel 2 are connected, and the a port and the c port of the first bypass switching valve 25 are connected, so that the main thermal management flow channel 2 and the battery pack thermal management flow channel 3 form a liquid cooling medium circulation in series; the second bypass switching valve 26 is closed, so that the liquid cooling medium channel of the condenser 12 of the refrigeration module is cut out of the liquid cooling medium circulation;

[0062] When entering the waste heat utilization mode (as Figure 4 shown): The c port and the d port of the branch switching valve 24 of the main thermal management flow channel 2 are connected, the a port and the b port of the branch switching valve 24 of the main thermal management flow channel 2 are connected, and the b port and the c port of the first bypass switching valve 25 are connected, so that the main thermal management flow channel 2 and the battery pack thermal management flow channel 3 form a liquid cooling medium circulation in series, and the radiator 23 is cut out of the liquid cooling medium circulation; the second bypass switching valve 26 is closed, so that the liquid cooling medium channel of the condenser 12 of the refrigeration module is cut out of the liquid cooling medium circulation;

[0063] When entering the battery self-circulation mode / battery heat preservation mode (as Figure 5As shown in the figure: the a port and the d port of the branch switching valve 24 of the main heat management flow channel 2 are connected, and the b port and the c port of the branch switching valve 24 of the main heat management flow channel 2 are closed, so that the liquid cooling medium circulation of the main heat management flow channel 2 is stopped, and the battery pack heat management flow channel 3 forms an independent liquid cooling medium circulation.

[0064] In the dual-temperature-zone liquid cooling type heat management system, the operation method of the heat management system and the vehicle of this embodiment, under the control of the branch switching valve 24 of the main heat management flow channel 2, the main heat management flow channel 2 and the battery pack heat management flow channel 3 can selectively form independent liquid cooling medium circulations, and the main heat management flow channel 2 and the battery pack heat management flow channel 3 can also selectively form a liquid cooling medium circulation in series. The main heat management flow channel 2 can cut the radiator 23 into or out of the liquid cooling medium circulation in a bypass manner, and the main heat management flow channel 2 can connect or cut out the liquid cooling medium channel of the condenser 12 of the refrigeration module into or out of the liquid cooling medium circulation in a branch manner; it can provide at least multiple operation modes such as the compressor 11 refrigeration mode, the radiator heat dissipation mode, the waste heat utilization mode, the battery self-circulation mode, the battery heat preservation mode, and the standby mode. While taking energy conservation into account, it meets the heat management requirements of the vehicle under various working conditions, and has the characteristics of excellent heat management performance, rich functional modes and easy control, high integration, and low energy consumption.

[0065] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual-temperature zone liquid cooling type thermal management system, applied to a vehicle, wherein the vehicle comprises a battery pack and at least one electric energy conversion component; characterized in that: Including refrigeration module, main thermal management channel and battery pack thermal management channel; The refrigeration module includes a compressor, a condenser, a throttling device and an evaporative heat exchanger, and the refrigerant channels of the compressor, the condenser, the throttling device and the evaporative heat exchanger are circulated and connected in sequence, so that the refrigerant can circulate in the refrigerant channels of the compressor, the condenser, the throttling device and the evaporative heat exchanger; The main thermal management flow channel includes a first circulation pump, a main flow channel heat exchanger, a heat dissipation water tank with a fan, and a branch switch valve. The main flow channel heat exchanger can exchange heat with the electric energy conversion component of the vehicle. The first circulation pump, the main flow channel heat exchanger, the heat dissipation water tank, and the liquid cooling medium channel of the branch switch valve are circulated and connected in sequence; The battery pack thermal management flow channel includes a second circulation pump and a battery pack heat exchanger, the battery pack heat exchanger can exchange heat with the battery pack of the vehicle, and the second circulation pump, the battery pack heat exchanger, the branch switching valve of the main thermal management flow channel and the liquid cooling medium channel of the evaporative heat exchanger of the refrigeration module are circulated and connected in sequence; Under the control of the branch switching valve of the main thermal management flow channel, the main thermal management flow channel and the battery pack thermal management flow channel can selectively form a liquid cooling medium cycle that is independent of each other, and the main thermal management flow channel and the battery pack thermal management flow channel can also selectively form a liquid cooling medium cycle in series; The main heat management flow channel can cut the heat dissipation water tank into or out of the liquid cooling medium circulation in a bypass manner; The main heat management flow channel can connect or cut out the liquid cooling medium channel of the condenser of the refrigeration module into or out of the liquid cooling medium circulation in a branch manner.

2. The dual-temperature zone liquid cooling thermal management system according to claim 1, characterized in that: The branch switching valve of the main thermal management flow channel is a four-way valve, which includes a port a, a port b, a port c and a port d which are opened / closed by the host computer; The a port of the branch switching valve is connected to the battery pack heat exchanger of the battery pack thermal management flow channel, and the d port of the branch switching valve is connected to the liquid cooling medium channel of the evaporative heat exchanger of the refrigeration module; The b port of the branch switching valve is connected to the first circulation pump of the main thermal management flow channel, and the c port of the branch switching valve is connected to the heat dissipation water tank of the main thermal management flow channel.

3. The dual-temperature zone liquid cooling thermal management system according to claim 1 or 2, characterized in that: The main thermal management flow channel also includes a first bypass switching valve; The first bypass switching valve can cut the heat dissipation water tank into or out of the liquid cooling medium circulation in a bypass manner.

4. The dual-temperature zone liquid cooling thermal management system according to claim 3, characterized in that: The first bypass switching valve of the main thermal management flow channel is a three-way valve, which includes a port a, a port b and a port c which are opened / closed by the host computer; The a port of the first bypass switching valve is connected to the radiator water tank, the c port of the first bypass switching valve is connected to the main channel heat exchanger, and the b port of the first bypass switching valve is connected to the branch switching valve.

5. The dual-temperature zone liquid cooling type thermal management system according to claim 1 or 2, characterized in that: The main thermal management flow channel also includes a second bypass switching valve and a one-way valve; The second bypass switching valve includes two ports that are opened / closed by the host computer; The two ports of the second bypass switching valve are respectively connected to the outlet end of the heat dissipation water tank and the inlet end of the liquid cooling medium channel of the condenser of the refrigeration module; The two ports of the one-way valve are respectively connected to the outlet end of the liquid cooling medium channel of the condenser of the refrigeration module and the inlet end of the heat dissipation water tank.

6. The dual-temperature zone liquid cooling thermal management system according to claim 1, characterized in that: The battery pack thermal management channel also includes a heater for heating the liquid cooling medium.

7. The dual-temperature zone liquid cooling type thermal management system according to claim 1, characterized in that: It also includes a first temperature sensor connected to the inlet end of the heat sink of the main thermal management channel, a second temperature sensor connected to the inlet end of the battery pack heat exchanger of the battery pack thermal management channel, a third temperature sensor connected to the outlet end of the battery pack heat exchanger of the battery pack thermal management channel, and a fourth temperature sensor connected to the inlet end of the main channel heat exchanger of the main thermal management channel.

8. A method for operating a thermal management system, applied to the dual-temperature zone liquid cooling thermal management system according to any one of claims 1 to 7; characterized in that: The method includes: According to at least one operating condition signal of the vehicle and / or the dual-temperature zone liquid-cooled thermal management system, selectively enter one of the following operating modes: Compressor refrigeration mode: start the compressor and throttling device of the refrigeration module, and start the fan of the heat dissipation water tank. The main thermal management flow channel and the battery pack thermal management flow channel constitute independent liquid cooling medium cycles. The liquid cooling medium of the main thermal management flow channel absorbs the heat of the electric energy conversion component through the main flow channel heat exchanger, and dissipates the heat at the heat dissipation water tank. The liquid cooling medium of the battery pack thermal management flow channel absorbs the heat of the battery pack through the battery pack heat exchanger, and dissipates the heat at the evaporative heat exchanger of the refrigeration module. The main thermal management flow channel connects the liquid cooling medium channel of the condenser of the refrigeration module to the liquid cooling medium cycle in a branch manner. Water tank heat dissipation mode: the compressor and throttling device of the refrigeration module are stopped, and the fan of the heat dissipation water tank is started. The main thermal management flow channel and the battery pack thermal management flow channel form a liquid cooling medium circulation in series; the liquid cooling medium of the main thermal management flow channel absorbs the heat of the electric energy conversion component through the main flow channel heat exchanger and dissipates the heat at the heat dissipation water tank; the liquid cooling medium of the battery pack thermal management flow channel absorbs the heat of the battery pack through the battery pack heat exchanger and dissipates the heat at the heat dissipation water tank of the main thermal management flow channel; the liquid cooling medium channel of the condenser of the refrigeration module is cut out of the liquid cooling medium circulation; Waste heat utilization mode: the compressor and throttling device of the refrigeration module are stopped, and the fan of the heat sink is stopped. The main thermal management channel and the battery pack thermal management channel are connected in series to form a liquid cooling medium circulation; the liquid cooling medium of the main thermal management channel absorbs the heat of the electric energy conversion component through the main channel heat exchanger, and transfers the heat to the battery pack through the battery pack heat exchanger of the battery pack thermal management channel; the main thermal management channel cuts the heat sink out of the liquid cooling medium circulation in a bypass manner; the liquid cooling medium channel of the condenser of the refrigeration module is cut out of the liquid cooling medium circulation; Battery self-circulation mode / battery heat preservation mode: the compressor and throttling device of the refrigeration module are stopped, and the fan of the heat dissipation water tank is stopped, and the liquid cooling medium circulation of the main thermal management flow channel is also stopped; the battery pack thermal management flow channel constitutes an independent liquid cooling medium circulation; Standby mode: the compressor and throttling device of the refrigeration module are stopped, and the fan of the heat dissipation water tank is stopped, and the liquid cooling medium circulation of the main thermal management channel and the liquid cooling medium circulation of the battery pack thermal management channel are both stopped.

9. The method for operating a thermal management system according to claim 8, characterized in that: The branch switching valve of the main thermal management flow channel is a four-way valve, which includes a port a, a port b, a port c and a port d which are opened / closed by the host computer; The a port of the branch switching valve is connected to the battery pack heat exchanger of the battery pack thermal management flow channel, and the d port of the branch switching valve is connected to the liquid cooling medium channel of the evaporative heat exchanger of the refrigeration module; The b port of the branch switching valve is connected to the first circulation pump of the main thermal management flow channel, and the c port of the branch switching valve is connected to the heat dissipation water tank of the main thermal management flow channel; The main thermal management flow channel also includes a first bypass switching valve; The first bypass switching valve can switch the heat dissipation water tank into or out of the liquid cooling medium circulation in a bypass manner; The first bypass switching valve of the main thermal management flow channel is a three-way valve, which includes a port a, a port b and a port c which are opened / closed by the host computer; The a port of the first bypass switching valve is connected to the heat dissipation water tank, the c port of the first bypass switching valve is connected to the main channel heat exchanger, and the b port of the first bypass switching valve is connected to the branch switching valve; The main thermal management flow channel also includes a second bypass switching valve and a one-way valve; The second bypass switching valve includes two ports that are opened / closed by the host computer; The two ports of the second bypass switching valve are respectively connected to the outlet end of the heat dissipation water tank and the inlet end of the liquid cooling medium channel of the condenser of the refrigeration module; The two ports of the one-way valve are respectively connected to the outlet end of the liquid cooling medium channel of the condenser of the refrigeration module and the inlet end of the heat dissipation water tank; When entering the compressor cooling mode: the a port and the d port of the branch switching valve of the main thermal management flow channel are connected, the b port and the c port of the branch switching valve of the main thermal management flow channel are connected, and the a port and the c port of the first bypass switching valve are connected, so that the main thermal management flow channel and the battery pack thermal management flow channel form independent liquid cooling medium circulations; the second bypass switching valve is opened, so that the main thermal management flow channel connects the liquid cooling medium channel of the condenser of the refrigeration module to the liquid cooling medium circulation in a branch manner; When entering the water tank heat dissipation mode: the c port and the d port of the branch switching valve of the main thermal management flow channel are connected, the a port and the b port of the branch switching valve of the main thermal management flow channel are connected, and the a port and the c port of the first bypass switching valve are connected, so that the main thermal management flow channel and the battery pack thermal management flow channel form a liquid cooling medium circulation in a series manner; The second bypass switching valve is closed, so that the liquid cooling medium channel of the condenser of the refrigeration module is cut out of the liquid cooling medium circulation; When entering the waste heat utilization mode: the c port and the d port of the branch switching valve of the main thermal management flow channel are connected, the a port and the b port of the branch switching valve of the main thermal management flow channel are connected, and the b port and the c port of the first bypass switching valve are connected, so that the main thermal management flow channel and the battery pack thermal management flow channel form a liquid cooling medium circulation in series, and the heat dissipation water tank is cut out of the liquid cooling medium circulation; The second bypass switching valve is closed, so that the liquid cooling medium channel of the condenser of the refrigeration module is cut out of the liquid cooling medium circulation; When entering the battery self-circulation mode / the battery insulation mode: the a port and the d port of the branch switching valve of the main thermal management channel are connected, and the b port and the c port of the branch switching valve of the main thermal management channel are closed, so that the circulation of the liquid cooling medium in the main thermal management channel is stopped, and the battery pack thermal management channel constitutes an independent liquid cooling medium circulation.

10. A vehicle, characterized in that: It includes the dual-temperature zone liquid cooling type thermal management system described in any one of claims 1-7.

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