Double-temperature-zone liquid cooling type thermal management system, operation method of thermal management system and vehicle

Abstract

The invention discloses a double-temperature-zone liquid cooling type heat management system, an operation method of the heat management system and a vehicle. The double-temperature-zone liquid cooling type heat management system comprises a refrigeration module, a main heat management flow channel and a battery pack heat management flow channel. The main heat management flow channel and the battery pack heat management flow channel can selectively form mutually independent liquid cooling medium circulation, and the main heat management flow channel and the battery pack heat management flow channel can also selectively form liquid cooling medium circulation in a series connection mode; the heat dissipation water tank can be cut into or out of the liquid cooling medium circulation by the main heat management flow channel in a bypass manner; the main heat management flow channel can be used for connecting or disconnecting a liquid cooling medium channel of a condenser of the refrigeration module into or out of a liquid cooling medium circulation in a branch way; according to the invention, multiple operation modes can be provided, the thermal management requirements of the vehicle under various working conditions are met while energy is saved, and the system has the characteristics of excellent thermal management performance, rich and easily-controlled functional modes, high integration level and low energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile thermal management systems, and in particular to a dual-temperature zone liquid-cooled thermal management system, an operating method of the thermal management system, and a vehicle. Background Art

[0002] For new energy vehicles that use electric motors as one of the driving forces, their battery packs, motors and controllers will generate a lot of heat, which needs to be dissipated in high temperature environments, otherwise it will affect the performance, safety and life of the new energy vehicle; low temperature environments can easily affect the battery life of the battery pack, so the battery pack of the new energy vehicle needs to be insulated / heated in low temperature environments.

[0003] Based on the above considerations, new energy vehicles are usually equipped with a thermal management system to achieve temperature control of the above 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] In the existing technology, some new energy vehicles will be equipped with independent thermal management systems (including at least multiple refrigeration devices and multiple liquid cooling water circuits) for the battery pack, motor and controller respectively, which will obviously cause problems such as excessive energy consumption, high system complexity and excessive vehicle weight; some new energy vehicles also use a set of refrigeration devices as the core of the thermal management system, and independently configure liquid cooling water circuits for components such as battery packs, motors and controllers. Although this can reduce energy consumption and vehicle weight to a certain extent, the system complexity has not been effectively reduced, and the energy consumption and vehicle weight are still relatively high.

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

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

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a dual-temperature zone liquid-cooled thermal management system, applied to a vehicle, the vehicle comprising a battery pack and at least one electric energy conversion component; it comprises a refrigeration module, a main thermal management flow channel and a battery pack thermal management flow channel; the refrigeration module comprises a compressor, a condenser, a throttling device and an evaporative heat exchanger, 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 comprises a first circulation pump, a main flow channel heat exchanger, a heat sink with a fan and a branch switching valve, the main flow channel heat exchanger can exchange heat with the electric energy conversion component of the vehicle, and the liquid cooling medium of the first circulation pump, the main flow channel heat exchanger, the heat sink and the branch switching valve The channels are connected in a circular manner; the battery pack thermal management 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 channel and the liquid-cooling medium channel of the evaporative heat exchanger of the refrigeration module are connected in a circular manner; under the control of the branch switching valve of the main thermal management channel, the main thermal management channel and the battery pack thermal management channel can selectively constitute independent liquid-cooling medium circulations, and the main thermal management channel and the battery pack thermal management channel can also selectively constitute a liquid-cooling medium circulation in series; the main thermal management channel can cut the heat sink into or out of the liquid-cooling medium circulation in a bypass manner; the main thermal management 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 channel is a four-way valve, which includes port a, port b, port c and port d which are opened / closed by the control of the upper computer; port a of the branch switching valve is connected to the battery pack heat exchanger of the battery pack thermal management channel, and port d of the branch switching valve is connected to the liquid cooling medium channel of the evaporative heat exchanger of the refrigeration module; port b of the branch switching valve is connected to the first circulation pump of the main thermal management channel, and port c of the branch switching valve is connected to the heat dissipation water tank of the main thermal management channel.

[0009] In the above technical solution, 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.

[0010] In the above technical solution, the first bypass switching valve of the main thermal management flow channel is a three-way valve, which includes port a, port b and port c which are opened / closed by the upper computer; port a of the first bypass switching valve is connected to the heat dissipation water tank, port c of the first bypass switching valve is connected to the main flow channel heat exchanger, and port b of the first bypass switching valve is connected to the branch switching valve.

[0011] In the above technical solution, 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 control of the upper 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.

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

[0013] In the above technical scheme, the dual-temperature zone liquid-cooled thermal management system of the present invention 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.

[0014] A method for operating a thermal management system is applied to the above-mentioned dual-temperature zone liquid cooling thermal management system; the method comprises:

[0015] 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:

[0016] 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.

[0017] 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;

[0018] 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;

[0019] 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;

[0020] 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.

[0021] In the above technical solution, 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 constitute 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;

[0022] 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 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 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;

[0024] 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.

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

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: the dual-temperature zone liquid-cooled thermal management system, the operating method of the thermal management system and the vehicle of the present invention, 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 constitute independent liquid cooling medium circulations, the main thermal management flow channel and the battery pack thermal management flow channel can also selectively constitute a liquid cooling medium circulation in series, the main thermal 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 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; it can provide at least a variety of operating modes such as compressor refrigeration mode, water tank heat dissipation mode, waste heat utilization mode, battery self-circulation mode, battery insulation mode and standby mode, while taking into account energy saving, it meets the thermal management needs of the vehicle under various working conditions, and has the characteristics of excellent thermal management performance, rich and easy controllable functional modes, high integration and low energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a system structure diagram 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; wherein 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, which is specifically a water condenser, that is, the condenser 12 has a liquid cooling medium channel, which can dissipate heat through the liquid cooling medium, and air convection devices such as fans are optional configurations of the condenser 12; the throttling device 13 is a throttling device in the refrigeration system, preferably an electronic expansion valve; the evaporative heat exchanger 1 4 is a metal heat exchanger, which is provided with a refrigerant evaporation structure and is used as an evaporator in a refrigeration system. In addition, the evaporative heat exchanger 14 has a liquid cooling medium channel, which can cool the liquid cooling medium flowing through its liquid cooling medium channel to a low temperature. The compressor 11, the condenser 12, the throttling device 13 and the refrigerant channels of the evaporative heat exchanger 14 are circulated and connected in sequence, so that the refrigerant can circulate in the refrigerant channels of the compressor 11, the condenser 12, the throttling device 13 and the evaporative heat exchanger 14. With this arrangement, the refrigeration function of the refrigeration module can be realized.

[0038] The main thermal management flow channel 2 includes a first circulation pump 21, a main flow channel heat exchanger 22, a heat dissipation water tank 23 with a fan 231, and a branch switching valve 24; wherein the first circulation pump 21 is a circulation pump dedicated to liquid cooling medium, such as an electronic water pump; the main flow channel heat exchanger 22 can exchange heat with the vehicle's electric energy conversion component 200. In some possible embodiments, the main flow channel heat exchanger 22 is a liquid cooling medium heat exchanger built into the electric energy conversion component 200. In other possible embodiments, the main flow channel heat exchanger 22 is a liquid cooling medium heat exchange plate attached to the surface of the electric energy conversion component 200; the heat dissipation water tank 23 is a metal cooler with multiple liquid flow channels, and heat dissipation fins are arranged between each liquid flow channel. It can dissipate heat for the liquid cooling medium flowing through it by forced convection or natural convection; the liquid cooling medium channels of the first circulation pump 21, the main flow channel heat exchanger 22, the heat dissipation water tank 23 and the branch switching valve 24 are circulated and connected in sequence.

[0039] The battery pack thermal management channel 3 includes a second circulation pump 31 and a battery pack heat exchanger 32; wherein the second circulation pump 31 is a circulation pump dedicated to liquid cooling medium, such as an electronic 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 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 second circulation pump 31, the battery pack heat exchanger 32, the branch switching valve 24 of the main thermal management channel 2, and the liquid cooling medium channels of the evaporative heat exchanger 14 of the refrigeration module are circulated and connected in sequence.

[0040] Under the control of the branch switching valve 24 of the main thermal management channel 2, the main thermal management channel 2 and the battery pack thermal management channel 3 can selectively constitute independent liquid cooling medium circulations, and the main thermal management channel 2 and the battery pack thermal management channel 3 can also selectively constitute a liquid cooling medium circulation in series; the main thermal management channel 2 can cut the heat sink 23 into or out of the liquid cooling medium circulation in a bypass manner; the main thermal management channel 2 can connect or cut out the liquid cooling medium channel of the condenser 12 of the refrigeration module in a branch manner.

[0041] Specifically, the branch switching valve 24 of the main thermal management channel 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 port a, port b, port c and port d that are opened / closed by a host computer (such as a vehicle controller, a programmable controller and an embedded system); port a of the branch switching valve 24 is connected to the battery pack heat exchanger 32 of the battery pack thermal management channel 3, and port d of the branch switching valve 24 is connected to the liquid cooling medium channel of the evaporative heat exchanger 14 of the refrigeration module; port b of the branch switching valve 24 is connected to the first circulation pump 21 of the main thermal management channel 2, and port c of the branch switching valve 24 is connected to the heat dissipation water tank 23 of the main thermal management channel 2.

[0042] Specifically, the main thermal management flow channel 2 further includes a first bypass switching valve 25 , and the first bypass switching valve 25 can cut the heat dissipation water tank 23 into or out of the liquid cooling medium circulation in a bypass manner.

[0043] Further specifically, the first bypass switching valve 25 of the main thermal management flow channel 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 a port a, a port b and a port c that are opened / closed by a host computer (such as a vehicle controller, a programmable controller and an embedded system); the a port of the first bypass switching valve 25 is connected to the radiator water tank 23, the c port of the first bypass switching valve 25 is connected to the main flow channel 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 thermal management flow channel 2 also includes a second bypass switching valve 26 and a one-way valve 27; wherein the second bypass switching valve 26 is specifically an electrically controlled valve, such as an electric valve or a solenoid-controlled valve, which includes two ports that are opened / closed by a host computer (such as a vehicle controller, a programmable controller, and an embedded system); the one-way valve 27 is a mechanical one-way liquid valve or an electrically controlled one-way liquid valve for preventing liquid reflux; the two ports of the second bypass switching valve 26 are respectively connected to the outlet end of the heat dissipation water 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 one-way 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 heat dissipation water tank 23.

[0045] Furthermore, the battery pack thermal management channel 3 also 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 of the battery pack thermal management channel 3 and the battery pack heat exchanger 32 .

[0046] Furthermore, the dual-temperature zone liquid-cooled thermal management system of this embodiment also includes a first temperature sensor TT1 connected to the inlet end of the heat dissipation water tank 23 of the main thermal management channel 2 (used to detect the outlet water temperature of the main channel heat exchanger 22), a second temperature sensor TT2 connected to the inlet end of the battery pack heat exchanger 32 of the battery pack thermal management channel 3 (used to detect the inlet water temperature of the battery pack heat exchanger 32), a third temperature sensor TT3 connected to the outlet end of the battery pack heat exchanger 32 of the battery pack thermal management channel 3 (used to detect the outlet water temperature of the battery pack heat exchanger 32), and a fourth temperature sensor TT4 connected to the inlet end of the main channel heat exchanger 22 of the main thermal management channel 2 (used to detect the inlet water temperature of the main channel heat exchanger 22); 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 zone liquid-cooled thermal management system of this embodiment is configured with a host computer (the vehicle controller (VCU) in this embodiment); the throttling device 13 of the refrigeration module, the branch switching valve 24 of the main thermal management channel 2, the first bypass switching valve 25 and the actuator of the second bypass switching valve 26 are all connected to the host computer through the LIN bus; the compressor 11 of the refrigeration module and the heater 33 of the battery pack thermal management channel 3 are all connected to the host computer through the CAN bus; the first circulation pump 21 and the fan 231 of the main thermal management channel 2, the second circulation pump 31 of the battery pack thermal management 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.

[0048] It is understandable that the host computer can also be connected to the battery management system (BMS) signal of the battery pack 100, for example, through a 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 a thermal management system, which uses the above-mentioned dual-temperature zone liquid cooling thermal management system. The method includes:

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

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

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

[0053] Water tank cooling mode (such as Figure 3 As shown): the compressor 11 and the throttling device 13 of the refrigeration module are stopped, and the fan 231 of the heat dissipation water tank 23 is started, and the main thermal management channel 2 and the battery pack thermal management channel 3 are connected in series to form a liquid cooling medium circulation; the liquid cooling medium of the main thermal management channel 2 absorbs the heat of the electric energy conversion component 200 through the main channel heat exchanger 22, and dissipates the heat at the heat dissipation water tank 23; the liquid cooling medium of the battery pack thermal management channel 3 absorbs the heat of the battery pack 100 through the battery pack heat exchanger 32, and dissipates the heat at the heat dissipation water tank 23 of the main thermal management channel 2; the liquid cooling medium channel of the condenser 12 of the refrigeration module is cut out of the liquid cooling medium circulation.

[0054] In this embodiment, the water tank heat dissipation mode is suitable for when the temperature of the battery pack 100 is relatively high (for example, when the battery pack 100 is charged with slow charging technology, in relatively high temperature weather, or when driving at a moderate temperature); at this time, the first circulation pump 21 of the main thermal management channel 2 and the second circulation pump 31 of the battery pack thermal management channel 3 are both started, or one of them is started, and the heat dissipation water tank 23 (using the fan 231 for forced convection heat dissipation) can dissipate heat for the battery pack 100 and the power conversion component 200 at the same time, thereby achieving thermal management of the battery pack 100 and the power conversion component 200 at the same time, and having a better energy-saving effect.

[0055] Waste heat utilization mode (such as Figure 4 As shown): the compressor 11 and the throttling device 13 of the refrigeration module are stopped, and the fan 231 of the heat sink 23 is stopped, and the main thermal management channel 2 and the battery pack thermal management channel 3 form a liquid cooling medium circulation in series; the liquid cooling medium of the main thermal management channel 2 absorbs the heat of the electric energy conversion component 200 through the main channel heat exchanger 22, and transfers the heat to the battery pack 100 through the battery pack heat exchanger 32 of the battery pack thermal management channel 3; the main thermal management channel 2 cuts the heat sink 23 out of 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 of 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, the first circulation pump 21 of the main thermal management channel 2 and the second circulation pump 31 of the battery pack thermal management channel 3 are both started, or one of them is started, and the battery pack 100 is heated / insulated by the waste heat generated by the electric energy conversion component 200, thereby ensuring the normal operation of the battery pack 100 and improving the endurance of the battery pack 100 in a low temperature environment, while effectively utilizing the waste heat generated by the electric energy conversion component 200; the main thermal management channel 2 cuts the heat sink 23 out of the liquid cooling medium circulation in a bypass manner, which can avoid the heat of the liquid cooling medium from being lost at the heat sink 23; the heater 33 of the battery pack thermal management channel 3 can be selectively started to heat the liquid cooling medium, thereby further heating / insulating the battery pack 100.

[0057] Battery self-circulation mode / battery insulation mode (such as Figure 5 As shown): the compressor 11 and the throttling device 13 of the refrigeration module are stopped, and the fan 231 of the heat dissipation water tank 23 is stopped, and the liquid cooling medium circulation of the main thermal management channel 2 is also stopped; the battery pack thermal management channel 3 constitutes 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 cold weather, or when the car is idling in cold weather), or when the temperature difference between different cells of the battery pack 100 needs to be leveled; at this time, only the second circulation pump 31 of the thermal management channel is started, and the energy consumption is relatively low; the heater 33 of the thermal management channel 3 of the battery pack can be selectively started to heat the liquid cooling medium, thereby further heating / insulating the battery pack 100.

[0059] Standby mode: the compressor 11 and the throttling device 13 of the refrigeration module are stopped, and the fan 231 of the heat dissipation water tank 23 is stopped, and the liquid cooling medium circulation of the main thermal management channel 2 and the liquid cooling medium circulation of the battery pack thermal management channel 3 are both stopped.

[0060] Specifically, when the compressor 11 enters the cooling mode (such as Figure 2 As 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 cooling mode (such as Figure 3 As 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 (such as Figure 4 As 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 a series manner, and the heat dissipation water tank 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 warming mode (such as Figure 5As shown): the a port and the d port of the branch switching valve 24 of the main thermal management channel 2 are connected, and the b port and the c port of the branch switching valve 24 of the main thermal management channel 2 are closed, so that the liquid cooling medium circulation of the main thermal management channel 2 is stopped, and the battery pack thermal management channel 3 constitutes an independent liquid cooling medium circulation.

[0064] The dual-temperature zone liquid-cooled thermal management system, the operating method of the thermal management system and the vehicle of this embodiment, under the control of the branch switching valve 24 of the main thermal management flow channel 2, the main thermal management flow channel 2 and the battery pack thermal management flow channel 3 can selectively constitute a liquid cooling medium circulation independently of each other, and the main thermal management flow channel 2 and the battery pack thermal management flow channel 3 can also selectively constitute a liquid cooling medium circulation in series, the main thermal management flow channel 2 can cut the heat dissipation water tank 23 into or out of the liquid cooling medium circulation in a bypass manner, and the main thermal management flow channel 2 can connect or cut out the liquid cooling medium channel of the condenser 12 of the refrigeration module in a branch manner; it can provide at least a plurality of operating modes such as compressor 11 refrigeration mode, water tank heat dissipation mode, waste heat utilization mode, battery self-circulation mode, battery insulation mode and standby mode, while taking into account energy saving, it meets the thermal management needs of the vehicle under various working conditions, and has the characteristics of excellent thermal management performance, rich and easy controllable functional modes, high integration and low energy consumption.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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 type 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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