Battery cooling system for new energy vehicle, and vehicle

Abstract

A battery cooling system for a new energy vehicle, and a vehicle. The battery cooling system comprises a battery (1), a coolant loop (2), a first heat exchanger (3), and a turbine cooling device (4). A water channel of the coolant loop (2) passes through the interior of the battery (1). The first heat exchanger (3) comprises an air side and a first coolant side, the first coolant side is connected in series within the coolant loop (2), an input end of the air side is connected to an output end of the turbine cooling device (4), and an output end of the air side is in communication with a cabin (5) of the vehicle.

Description

Battery cooling system of new energy vehicle and vehicle Cross-reference to related applications

[0001] This application claims priority to Chinese Patent Application No. 202411046551.1, filed on August 01, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of vehicles, in particular to a battery cooling system of a new energy vehicle and a vehicle. BACKGROUND

[0003] During charging of the new energy vehicle, the battery temperature is controlled to be maintained within a suitable temperature range, which not only ensures the charging efficiency, but also prolongs the service life of the battery and the charging equipment, and reduces the damage of the charging supporting equipment caused by overheating of the battery.

[0004] At present, when the battery temperature is high, the heat of the battery is absorbed through the battery cooling liquid circuit, and then the absorbed heat is transferred to the refrigerant through the plate heat exchanger, and then the heat of the refrigerant is dissipated through the compressor, the condenser and the electronic expansion valve.

[0005] However, in a high temperature environment, the heat generation of the battery during charging is large, and the above cooling method needs to be used for cooling the battery with full power. At this time, if the cabin has a cooling demand, the above cooling method has no spare capacity to meet the cooling demand of the cabin. SUMMARY

[0006] In view of the above problems, the present application is proposed to provide a battery cooling system of a new energy vehicle and a vehicle which can solve the above problems. The system can inhale air in the cabin through a turbo cooling device, and reduce the cabin air to an ultra-low temperature. The ultra-low temperature air is used to absorb the heat load of the cooling liquid in the first heat exchanger, thereby reducing the temperature of the cooling liquid. Then, the low-temperature cooling liquid is used to reduce the temperature of the battery. At the same time, the air after absorbing the heat load changes from ultra-low temperature to low temperature, and then flows to the cabin to reduce the temperature of the cabin. The system not only can reduce the temperature of the battery, but also can reduce the temperature of the cabin. Since the refrigeration capacity of the turbo cooling device is strong, even in a high temperature environment, the cooling demands of the battery and the cabin can be met at the same time.

[0007] In a first aspect, the present application provides a battery cooling system of a new energy vehicle, comprising a battery, a cooling liquid circuit, a first heat exchanger and a turbo cooling device.

[0008] The water channel of the cooling liquid circuit passes through the inside of the battery;

[0009] The first heat exchanger comprises an air side and a first coolant side, the first coolant side is connected in series in the coolant circuit, an input end of the air side is connected with an output end of the turbo cooling device, and an output end of the air side is communicated with a cabin of the vehicle.

[0010] Optionally, the system further comprises a refrigerant circuit and a second heat exchanger.

[0011] The second heat exchanger comprises a refrigerant side and a second coolant side, the refrigerant side is connected in series in the refrigerant circuit, and the second coolant side is connected in parallel with the first coolant side.

[0012] Optionally, the turbo cooling device comprises a motor, a compressor, a turbo cooler and an air cooler.

[0013] Optionally, the turbo cooling device further comprises a water vapor separator.

[0014] Optionally, the coolant circuit comprises a three-way valve and a water pump.

[0015] A first port of the three-way valve is connected with the first coolant side, a second port of the three-way valve is connected with the second coolant side, and a third port of the three-way valve is connected with the water pump.

[0016] Optionally, the system further comprises a controller, and the controller is configured to:

[0017] acquire a charging power of a charging pile charging the battery and a battery temperature;

[0018] if the charging power is less than or equal to a preset first power threshold and the battery temperature is less than or equal to a preset first temperature threshold, control the first port of the three-way valve to be closed and the second port of the three-way valve to be opened.

[0019] Optionally, the controller is further configured to:

[0020] if the charging power is greater than the first power threshold and less than a preset second power threshold, the battery temperature is less than or equal to the first temperature threshold, if the charging power is less than or equal to the first power threshold, the battery temperature is greater than the first temperature threshold and less than a preset second temperature threshold, or if the charging power is greater than the first power threshold and less than the second power threshold, the battery temperature is greater than the first temperature threshold and less than the second temperature threshold, control the first port of the three-way valve to be opened and the second port of the three-way valve to be closed.

[0021] Optionally, the controller is further configured to:

[0022] If the charging power is greater than or equal to the second power threshold, or the battery temperature is greater than or equal to the second temperature threshold, the first port and the second port of the three-way valve are controlled to be opened.

[0023] Optionally, the controller is further configured to:

[0024] After the first port of the three-way valve is controlled to be opened, the controller is configured to determine the rotation speed of the motor according to the charging power and the battery temperature.

[0025] In a second aspect, the present application provides a vehicle, which comprises the battery cooling system of the new energy vehicle.

[0026] The technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0027] The battery cooling system of the new energy vehicle and the vehicle provided by the embodiments of the present application include a battery, a cooling liquid circuit, a first heat exchanger and a turbo cooling device. The water channel of the cooling liquid circuit passes through the inside of the battery, and the battery temperature is reduced by the cooling liquid in the water channel. The turbo cooling device can suck cabin air and change the sucked cabin air into ultra-low temperature gas, and then the ultra-low temperature gas absorbs the heat load of the cooling liquid through the first heat exchanger, so that the temperature of the cooling liquid is reduced, and the low-temperature gas formed after absorption flows back to the cabin to play a role of cooling the cabin. The system not only can reduce the battery temperature but also can reduce the cabin temperature. Since the refrigeration capacity of the turbo cooling device is strong, the cooling demand of the battery and the cabin can be met at the same time even in a high-temperature environment.

[0028] The above description is only a summary of the technical solutions of the present application. In order to enable the technical means of the present application to be more clearly understood, the present application can be implemented in accordance with the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0029] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are intended to further aid the full and complete understanding of the present application. The drawings are merely for the purpose of illustrating preferred embodiments of the present application and are not to be construed as limiting the present application. Moreover, the same reference numerals denote the same components throughout the drawings. In the drawings:

[0030] FIG. 1 is a structural schematic diagram of a battery cooling system of a new energy vehicle according to an embodiment of the present application;

[0031] FIG. 2 is a structural schematic diagram of another battery cooling system of a new energy vehicle according to an embodiment of the present application;

[0032] FIG. 3 is a structural schematic diagram of another battery cooling system of a new energy vehicle according to an embodiment of the present application.

[0033] Legend:

[0034] 1, battery; 2, cooling liquid circuit; 21, three-way valve; 22, water pump; 3, first heat exchanger; 4, turbo cooling device; 41, motor; 42, compressor; 43, turbo cooler; 44, air cooler; 45, water vapor separator; 46, second cooling fan;

[0035] 5, cabin; 6, on-board charger; 7, charging pile; 8, second heat exchanger; 91, compressor; 92, condenser; 93, electronic expansion valve; 94, first cooling fan. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the drawings.

[0037] Before the battery cooling system of the new energy vehicle according to the embodiments of the present application is described in detail, the implementation environment involved will be briefly introduced.

[0038] During charging of the new energy vehicle, the battery temperature is controlled to be maintained within a proper temperature range, which not only ensures the charging efficiency, but also prolongs the service life of the battery and the charging equipment, and reduces the damage of the charging supporting equipment caused by overheating of the battery.

[0039] At present, when the battery temperature is high, the heat of the battery is absorbed through the battery cooling liquid circuit, and then the absorbed heat is transferred to the refrigerant through the plate heat exchanger, and then the heat of the refrigerant is dissipated through the compressor, the condenser and the electronic expansion valve.

[0040] However, with the continuous improvement of the cruising range and charging rate of new energy vehicles, the battery capacity is also increasing, and the demand for battery charging power is also increasing, especially in a high temperature environment, the heat generated during battery charging is large, and the above cooling method needs to be used for battery cooling. At this time, if the cabin has a cooling demand, the above cooling method has no spare capacity to meet the cooling demand of the cabin.

[0041] Therefore, the battery cooling system of the new energy vehicle is provided, air in the cabin can be sucked by the turbine cooling device, and the cabin air is reduced to an ultra-low temperature, the air at the ultra-low temperature is used to absorb the heat load of the cooling liquid in the first heat exchanger, so as to reduce the temperature of the cooling liquid, and then the cooling liquid at the low temperature is used to reduce the temperature of the battery, and meanwhile, the air after absorbing the heat load changes from the ultra-low temperature to the low temperature, and then flows to the cabin to reduce the temperature of the cabin. The system can not only reduce the temperature of the battery, but also reduce the temperature of the cabin. Since the refrigeration capacity of the turbine cooling device is strong, the cooling requirements of the battery and the cabin can be met at the same time even in a high-temperature environment and under super-fast charging conditions.

[0042] FIG. 1 is a structural schematic diagram of a battery cooling system of a new energy vehicle according to an embodiment of the present application. As shown in FIG. 1, the system includes a battery 1, a cooling liquid circuit 2, a first heat exchanger 3, and a turbine cooling device 4.

[0043] The water channel of the cooling liquid circuit 2 passes through the inside of the battery 1; the first heat exchanger 3 includes an air side and a first cooling liquid side, the first cooling liquid side is connected in series in the cooling liquid circuit 2, and the input end of the air side is connected with the output end of the turbine cooling device 4, and the output end of the air side is communicated with the cabin 5 of the vehicle.

[0044] The input end of the turbine cooling device 4 can be communicated with the cabin 5, so that the air in the cabin 5 has stronger flowability and faster cooling speed. Of course, it can also be communicated with other places with air. The heat exchanger is an energy-saving device for realizing heat transfer between materials between two or more fluids at different temperatures, and is used to transfer heat from the fluid at a higher temperature to the fluid at a lower temperature, so that the fluid temperature reaches the specified index of the flow process to meet the needs of the process conditions, and is also one of the main devices for improving energy utilization. The first heat exchanger can be a plate heat exchanger.

[0045] In the embodiment, the vehicle includes an on-board charger 6, which is used to charge the battery 1. When the on-board charger 6 is connected to an external charging pile 7, the battery 1 starts to charge. At the same time, power can also be taken from the on-board charger 6 to supply the electric turbine cooling device 4 for use. Of course, other power-consuming devices in the battery cooling system of the new energy vehicle can also take power from the on-board charger 6, or from the power source such as the battery of the vehicle. The on-board charger 6 is in communication connection with the charging pile 7 and the battery 1.

[0046] Specifically, the cooling liquid circuit 2 comprises a water channel and cooling liquid, the cooling liquid circulates in the water channel, and after circulating into the battery 1, the battery 1 is cooled. The turbo cooling device 4 inhales air from the cabin 5, and then converts the inhaled air into ultra-low-temperature low-normal-pressure gas (the pressure of the ultra-low-temperature low-normal-pressure gas is slightly greater than the atmospheric pressure, and the temperature can be lower than-20℃), and flows to the air side of the first heat exchanger 3 to absorb the heat load of the cooling liquid in the cooling liquid side of the first heat exchanger 3. After absorption, the air becomes low-temperature normal-pressure gas (the pressure of the low-temperature normal-pressure gas is slightly greater than the atmospheric pressure, and the temperature can be lower than 5℃), and the low-temperature normal-pressure gas finally flows back to the cabin 5 to reduce the temperature of the cabin. Therefore, the battery cooling system of the new energy vehicle realizes the air circulation cooling of the battery 1 through the turbo cooling device 4. Through the air circulation cooling mode, the temperature of the battery 1 and the temperature of the cabin 5 can be reduced. Since the refrigeration capacity of the turbo cooling device 4 is strong, the cooling requirements of the battery 1 and the cabin 5 can be met at the same time even in a high-temperature environment and a super-fast charging condition.

[0047] FIG. 2 is a structural schematic diagram of another battery cooling system of a new energy vehicle provided by the embodiment of the application. As shown in FIG. 2, the turbo cooling device 4 comprises a motor 41, a compressor 42, a turbo cooler 43 and an air cooler 44.

[0048] The motor 41, the compressor 42, the air cooler 44 and the turbo cooler 43 are arranged in sequence. The compressor 42 is a component for increasing the pressure of air. The turbo cooler 43 is a high-speed rotating refrigeration machine for realizing pressure reduction and temperature reduction by converting the enthalpy drop generated when compressed air with a certain temperature and pressure is expanded into mechanical work output. The air cooler 44 is a heat exchanger for cooling a hot fluid by using air. The hot fluid in the pipe exchanges heat with the air outside the pipe through the pipe wall and fins, and the air is usually supplied by a ventilator.

[0049] In the embodiment, the motor 41 starts to work after taking electricity from the on-board charger 6, and drives the compressor 42 to work. The compressor 42 inhales air in the cabin 5, converts the inhaled air into high-temperature high-pressure gas, and then converts the high-temperature high-pressure gas into medium-temperature high-pressure gas through the air cooler 44. Finally, the medium-temperature high-pressure gas is converted into ultra-low-temperature low-normal-pressure gas through the turbo cooler 43, and flows to the air side of the first heat exchanger 3 to absorb the heat load of the cooling liquid in the cooling liquid side of the first heat exchanger 3. After absorption, the ultra-low-temperature low-normal-pressure gas becomes low-temperature normal-pressure gas (the pressure is slightly greater than the atmospheric pressure, and the temperature is lower than 5℃), and the low-temperature normal-pressure gas finally flows back to the cabin 5 to reduce the temperature of the cabin.

[0050] Optionally, the turbo cooling device 4 further comprises a water vapor separator 45.

[0051] The water vapor separator 45 can be arranged between the air compressor 42 and the air cooler 44. The high-temperature and high-pressure gas containing water is sucked into the water vapor separator 45 and moves downwardly in a neutral cyclone centrifugal manner. Because the densities of the gas and the liquid are different, if the two need to pass through the filter together, generally, the liquid is filtered onto the filter, and the gas can pass through. Because the gas is neutral, the gas still moves in the original direction, so that the water vapor in the high-temperature and high-pressure gas is removed, and the ice formation at the outlet of the turbine cooler 43 is prevented.

[0052] Fig. 3 is a structural schematic view of another battery cooling system of a new energy vehicle according to an embodiment of the present application. As shown in Fig. 3, the battery cooling system of the new energy vehicle further comprises a refrigerant circuit and a second heat exchanger 8. The second heat exchanger 8 comprises a refrigerant side and a second cooling liquid side. The refrigerant side is connected in series in the refrigerant circuit, and the second cooling liquid side is connected in parallel with the first cooling liquid side.

[0053] In the embodiment, the second cooling mode of the cooling liquid is obtained by additionally arranging the refrigerant circuit and the second heat exchanger 8. The second heat exchanger 8 can be a plate heat exchanger. The refrigerant circuit can comprise a compressor 91, a condenser 92, an electronic expansion valve 93, a first cooling fan 94, and pipes and the like. The compressor 91, the condenser 92, and the electronic expansion valve 93 are arranged in sequence. The compressor 91 is a driven fluid machine for lifting low-pressure gas to high-pressure gas, and is the heart of the refrigeration system. The condenser 92 belongs to a kind of heat exchanger, and can change gas or vapor into liquid. The heat in the pipe is quickly transferred to the air near the pipe. The electronic expansion valve 93 is a throttling element that can enter the refrigerant flow of the refrigeration device according to the preset program, and is very suitable for occasions with severe load changes or wide operating condition ranges.

[0054] Specifically, the low-temperature liquid refrigerant (refrigerant) flows in the pipe, exchanges heat with the cooling liquid when passing through the second heat exchanger 8 to form a medium-temperature gas, the medium-temperature gas flows to the compressor 91, and becomes a high-temperature gas under the action of the compressor 91. The high-temperature gas flows to the condenser 92, and becomes a low-temperature gas after heat dissipation through the condenser 92. The low-temperature gas flows to the electronic expansion valve 93, and becomes a low-temperature liquid after the action of the electronic expansion valve 93. Finally, the low-temperature liquid flows back to the second heat exchanger 8 to cool the cooling liquid. Therefore, the battery cooling system of the new energy vehicle now has two cooling modes, one is air circulation cooling, and the other is refrigerant circulation cooling.

[0055] The first cooling fan 94 can assist the condenser 92 to dissipate heat. The turbine cooling device 4 can also comprise a second cooling fan 46 for assisting the air cooler 44 to cool air.

[0056] Optionally, the cooling liquid circuit 2 comprises a three-way valve 21 and a water pump 22; a first port of the three-way valve 21 is connected with the first cooling liquid side, a second port of the three-way valve 21 is connected with the second cooling liquid side, and a third port of the three-way valve 21 is connected with the water pump 22.

[0057] In the embodiment, the cooling liquid in the water channel is circulated by the water pump 22, and the switching of the cooling mode is realized by the three-way valve 21. When the port of the three-way valve 21 is closed, the cooling liquid cannot pass through the port. For example, when the first port is closed, the cooling liquid cannot pass through the first heat exchanger 3, and the cooling of the cooling liquid by the air cooling mode is not realized; when the second port is closed, the cooling liquid cannot pass through the second heat exchanger 8, and the cooling of the cooling liquid by the refrigerant cooling mode is not realized; when the third port is closed, the cooling liquid cannot be circulated in the whole cooling liquid circuit 2.

[0058] Optionally, the system further comprises a controller, and the controller is configured to:

[0059] acquire the charging power of the charging pile 7 for charging the battery 1 and the battery temperature; and control the first port of the three-way valve 21 to be closed and the second port of the three-way valve 21 to be opened, when the charging power is less than or equal to a preset first power threshold and the battery temperature is less than or equal to a preset first temperature threshold.

[0060] In the embodiment, the charging power of the charging pile 7 directly affects the temperature of the battery during charging, and the charging power of the charging pile 7 can be acquired by the on-board charger 6. The battery temperature is actually acquired by the temperature sensor.

[0061] In the embodiment, the cooling capacity of the turbo cooling device 4 is greater than the cooling capacity of the refrigerant circuit, but the energy consumption of the refrigerant circuit is slightly lower. Therefore, when the charging power is small and the battery temperature is also low, the first port of the three-way valve 21 can be closed and the second port of the three-way valve 21 can be opened, and only the refrigerant circulation cooling mode is started to cool the battery 1, so that the battery temperature can be ensured to be in a proper range with small energy consumption.

[0062] Optionally, the controller is further configured to:

[0063] control the first port of the three-way valve 21 to be opened and the second port of the three-way valve 21 to be closed, when the charging power is greater than the first power threshold and less than a preset second power threshold, the battery temperature is less than or equal to the first temperature threshold, the charging power is less than or equal to the first power threshold, the battery temperature is greater than the first temperature threshold and less than a preset second temperature threshold, or the charging power is greater than the first power threshold and less than the second power threshold, and the battery temperature is greater than the first temperature threshold and less than the second temperature threshold.

[0064] In the embodiment, if the charging power is slightly high or the battery temperature is slightly high, the first port of the three-way valve 21 can be opened and the second port can be closed, and only the air circulation cooling mode is used to cool the battery 1, so that a higher cooling capacity is provided, and the battery temperature can be reduced to a suitable range. Moreover, if the cabin 5 has a refrigeration demand at this time, the cooling capacity of the turbo cooling device 4 can simultaneously meet the cooling demands of the battery 1 and the cabin 5.

[0065] Optionally, the controller is further configured to:

[0066] If the charging power is greater than or equal to the second power threshold value, or the battery temperature is greater than or equal to the second temperature threshold value, the first port and the second port of the three-way valve 21 are both opened.

[0067] In the embodiment, if the charging power is very high or the battery temperature is very high, the first port and the second port of the three-way valve 21 can be both opened, and the air circulation cooling and the refrigerant circulation cooling modes are both used to cool the battery 1, so that the battery temperature can be quickly reduced to a suitable range. Moreover, if the cabin 5 has a refrigeration demand at this time, the two cooling modes can simultaneously meet the cooling demands of the battery 1 and the cabin 5.

[0068] Of course, when the charging power is small and the battery temperature is also low, if the cabin 5 has a refrigeration demand, the first port of the three-way valve 21 is opened and the second port is closed, and only the air circulation cooling mode is used to cool the battery 1, so that a higher cooling capacity is provided, and the cooling demands of the battery 1 and the cabin 5 can both be met.

[0069] Optionally, the controller is further configured to:

[0070] After the first port of the three-way valve 21 is opened, the speed of the motor 41 is determined according to the charging power and the battery temperature.

[0071] In the embodiment, when the air circulation cooling mode is used, the speed of the motor 41 can be determined according to the charging power and the battery temperature, and different speeds correspond to different cooling capacities of the turbo cooling device 4. The higher the speed is, the more air the air compressor 42 sucks in, the more super-low-temperature and low-pressure air the turbo cooler 43 outputs, and the stronger the ability of the turbo cooler 43 to cool the cooling liquid in the first heat exchanger 3 is.

[0072] In the embodiment, the pressure ratio of the air compressor 42 can also be determined according to the charging power and the battery temperature, and different pressure ratios correspond to different gas pressures output by the air compressor 42, and different gas pressures correspond to different cooling capacities of the turbo cooling device 4. Therefore, in order to use the lowest energy consumption to ensure that the battery temperature is in a suitable range, the cooling capacity of the turbo cooling device 4 can be determined according to the charging power and the battery temperature, that is, the cooling demand of the battery 1.

[0073] The ratio of the total pressure of the air at the outlet of the compressor 42 to the total pressure of the air at the inlet is referred to as the pressure ratio of the compressor 42.

[0074] Based on the same inventive concept, the embodiments of the present application also provide a vehicle, which comprises any one of the battery cooling systems of the new energy vehicles described above.

[0075] The electronic device can comprise a processor and a memory, wherein the processor and the memory can be communicatively connected with each other through a bus or other manners.

[0076] The processor can be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement one or more embodiments of the present application.

[0077] The memory can include a mass storage for data or instructions. By way of example and not limitation, the memory can include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a Universal Serial Bus (USB) drive or a combination of two or more of these. Where appropriate, the memory can include removable or non-removable (or fixed) media. Where appropriate, the memory can be internal or external to the electronic device. In certain embodiments, the memory can be a non-volatile solid-state memory.

[0078] In one example, the memory can be a read-only memory (ROM). In one example, the ROM can be a mask-programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically alterable ROM (EAROM), or a flash memory, or a combination of two or more of these.

[0079] The processor realizes the functions of the controller in any one of the battery cooling systems of the new energy vehicles in the above embodiments by reading and executing the computer program instructions stored in the memory.

[0080] In one example, the electronic device can further comprise a communication interface and a bus. The processor, the memory, and the communication interface are connected through the bus and complete communication with each other. The communication interface is mainly used to realize the communication between the modules, devices, units, and / or equipment in the embodiments of the present application. Where appropriate, the bus can include one or more buses.

[0081] In addition, in combination with the function of the controller in the battery cooling system of the new energy vehicle in the above embodiment, the embodiment of the application can provide a computer readable storage medium for implementation. The computer readable storage medium has computer program instructions stored thereon; the computer program instructions are executed by a processor to realize the function of the controller in the battery cooling system of the new energy vehicle in any one of the above embodiments.

[0082] The technical solutions in the above embodiments of the application have at least the following technical effects or advantages:

[0083] The battery cooling system and the vehicle provided by the embodiment of the application have the following advantages: The battery cooling system of the new energy vehicle provided by the embodiment of the application comprises a battery, a cooling liquid circuit, a first heat exchanger, and a turbo cooling device. The water channel of the cooling liquid circuit passes through the inside of the battery, and the temperature of the battery is reduced by the cooling liquid in the water channel. The turbo cooling device can suck cabin air and change the sucked cabin air into ultra-low-temperature gas, and then the ultra-low-temperature gas absorbs the heat load of the cooling liquid through the first heat exchanger, so that the temperature of the cooling liquid is reduced, and the low-temperature gas formed after absorption flows back to the cabin to play a role of cooling the cabin. The system can not only reduce the temperature of the battery but also reduce the temperature of the cabin. Since the refrigeration capacity of the turbo cooling device is strong, the cooling requirements of the battery and the cabin can be met at the same time even in a high-temperature environment.

[0084] In the description provided herein, a large number of specific details are explained. However, it can be understood that the embodiments of the application can be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure the understanding of the present description.

[0085] Similarly, it should be appreciated that the individual features of the application have sometimes been shown together in a single embodiment, figure or description of an embodiment in the foregoing description of example embodiments of the application in order to not obscure the disclosure with details that have broad applicability to various inventive aspects. Neither should that method of disclosure be interpreted as reflecting an intention that the application requires more features than are explicitly recited in each claim. Rather, inventive aspects lie in less than all features of the single embodiments disclosed above. Accordingly, the claims, as follows, reflect applicant's consideration of less than all features of the embodiments. Each claim, by itself, suffices as a separate embodiment of the application, and the application can or can not encompass each and every conceivable combination of features.

[0086] It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word 'comprising' does not exclude the presence of elements or steps not listed in a claim. The word 'a' or 'an' preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of both hardware and software, and any combination thereof. In a unitary claim, several devices or means can be listed, comprising means which can be implemented by one and the same hardware item. The use of the word 'a' or 'an' preceding an element does not exclude the presence of a plurality of such elements. The word 'first','second', 'third' etc. can merely be used for distinguishing between similar elements, and do not imply any order or priority.

Claims

1. A battery cooling system for a new energy vehicle, the system comprising a battery, a coolant circuit, a first heat exchanger, and a turbine cooling device; The coolant circuit channels pass through the inside of the battery; The first heat exchanger includes an air side and a first coolant side, the first coolant side being connected in series in the coolant circuit, the input end of the air side being connected to the output end of the turbine cooling device, and the output end of the air side being connected to the vehicle's cabin.

2. The battery cooling system for new energy vehicles according to claim 1, wherein, The system also includes a refrigerant circuit and a second heat exchanger; The second heat exchanger includes a refrigerant side and a second coolant side, wherein the refrigerant side is connected in series in the refrigerant circuit, and the second coolant side is connected in parallel with the first coolant side.

3. The battery cooling system for new energy vehicles according to claim 1, wherein, The turbine cooling device includes a motor, a compressor, a turbine cooler, and an air cooler.

4. The battery cooling system for new energy vehicles according to claim 3, wherein, The turbine cooling device also includes a water vapor separator.

5. The battery cooling system for new energy vehicles according to claim 3, wherein, The coolant circuit includes a three-way valve and a water pump; The first port of the three-way valve is connected to the first coolant side, the second port of the three-way valve is connected to the second coolant side, and the third port of the three-way valve is connected to the water pump.

6. The battery cooling system for new energy vehicles according to claim 5, wherein, The system also includes a controller, the controller being used for: Obtain the charging power and battery temperature of the charging station that is charging the battery; If the charging power is less than or equal to a preset first power threshold and the battery temperature is less than or equal to a preset first temperature threshold, then the first port of the three-way valve is controlled to close and the second port is controlled to open.

7. The battery cooling system for new energy vehicles according to claim 6, wherein, The controller is also used for: If the charging power is greater than the first power threshold and less than the preset second power threshold, and the battery temperature is less than or equal to the first temperature threshold, or if the charging power is less than or equal to the first power threshold and the battery temperature is greater than the first temperature threshold and less than the preset second temperature threshold, or if the charging power is greater than the first power threshold and less than the second power threshold, and the battery temperature is greater than the first temperature threshold and less than the second temperature threshold, then the first port of the three-way valve is controlled to open and the second port is controlled to close.

8. The battery cooling system for new energy vehicles according to claim 7, wherein, The controller is also used for: If the charging power is greater than or equal to the second power threshold, or the battery temperature is greater than or equal to the second temperature threshold, then the first port and the second port of the three-way valve are both opened.

9. The battery cooling system for new energy vehicles according to claim 8, wherein, The controller is also used for: After the first port of the three-way valve is opened, the speed of the motor is determined based on the charging power and the battery temperature.

10. A vehicle comprising the battery cooling system of any one of claims 1-9 for a new energy vehicle.

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