CN109494430A - Overhead type battery thermal management assembly compressor protection structure and guard method - Google Patents

Overhead type battery thermal management assembly compressor protection structure and guard method Download PDF

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Publication number
CN109494430A
CN109494430A CN201811590610.6A CN201811590610A CN109494430A CN 109494430 A CN109494430 A CN 109494430A CN 201811590610 A CN201811590610 A CN 201811590610A CN 109494430 A CN109494430 A CN 109494430A
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CN
China
Prior art keywords
expansion valve
pressure
output end
compressor
input terminal
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Granted
Application number
CN201811590610.6A
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Chinese (zh)
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CN109494430B (en
Inventor
吴新剑
曾凯
夏志海
蔡永茂
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WUHAN SONGZ AUTOMOBILE AIR CONDITIONING Co Ltd
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WUHAN SONGZ AUTOMOBILE AIR CONDITIONING Co Ltd
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Priority to CN201811590610.6A priority Critical patent/CN109494430B/en
Publication of CN109494430A publication Critical patent/CN109494430A/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/61Types of temperature control
    • H01M10/613Cooling or keeping cold
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00Compression machines, plants or systems with non-reversible cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/20Disposition of valves, e.g. of on-off valves or flow control valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/30Expansion means; Dispositions thereof
    • F25B41/31Expansion valves
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/656Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567Liquids
    • H01M10/6568Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/66Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

Overhead type battery thermal management assembly compressor protection structure designed by the present invention; the refrigerant input terminal of its plate heat exchanger is used to connect the output end of expansion valve inlet tube; the first input end of the output of condenser connection expansion valve of plate heat exchanger; the input terminal of the first output end connection expansion valve escape pipe of expansion valve, expansion valve first input end are connected to the first output end of expansion valve;The input terminal of the output end connection crankcase pressure regulating valve of expansion valve escape pipe, the input terminal of the output end connect compressor muffler of crankcase pressure regulating valve, the input terminal of the output end connect compressor of compressor return air pipe.The present invention can guarantee compressor stable operation, and battery thermal management system is avoided to cause the impact to compressor because of frequent start-stop.

Description

Overhead type battery thermal management assembly compressor protection structure and guard method
Technical field
The present invention relates to battery thermal management technical fields, protect in particular to a kind of overhead type battery thermal management assembly compressor Protection structure and guard method.
Technical background
The typically no setting compressor pressure protective device in compressor return air pipe road of existing battery thermal management system, Which results in when battery temperature changes greatly or when system frequent starting, cause compressor return air pressure Large change, thus to compressor cause impact and damage.
Summary of the invention
Present invention aim to provide a kind of overhead type battery thermal management assembly compressor protection structure, energy of the present invention Guarantee compressor stable operation, battery thermal management system is avoided to cause the impact to compressor because of frequent start-stop.
In order to achieve this, a kind of overhead type battery thermal management assembly compressor protection structure designed by the present invention, Be characterized in that, it include plate heat exchanger, expansion valve, expansion valve escape pipe, crankcase pressure regulating valve, compressor return air pipe and Compressor, wherein the refrigerant input terminal of plate heat exchanger is used to connect the output end of expansion valve inlet tube, plate heat exchanger Output of condenser connects the first input end of expansion valve, the input of the first output end connection expansion valve escape pipe of expansion valve End, expansion valve first input end are connected to the first output end of expansion valve;
Expansion valve escape pipe output end connection crankcase pressure regulating valve input terminal, crankcase pressure regulating valve it is defeated The input terminal of outlet connect compressor muffler, the input terminal of the output end connect compressor of compressor return air pipe.
A kind of overhead type battery thermal management assembly compressor protection method, it includes the following steps:
Step 1: when temperature of powered cell rises, battery coolant temperature being caused to rise, battery coolant liquid is defeated by water pump It is sent to after plate heat exchanger, the battery coolant liquid that temperature rises makes the refrigerant vapor in plate heat exchanger;Cause compressor Back pressure in muffler rises;
Step 2: crankcase pressure regulating valve retains return-air at this time, so that crankcase pressure is adjusted valve outlet pressure and protects It holds in preset pressure, to stablize back pressure operating condition;
Step 3: when temperature of powered cell decline, battery coolant temperature being caused to decline, battery coolant liquid is defeated by water pump It is sent to after plate heat exchanger, the battery coolant liquid of temperature decline makes the refrigerant in plate heat exchanger slow down gasification, causes to press Back pressure decline in contracting machine muffler, at this point, crankcase pressure regulating valve carries out storage stream to return-air, makes crankcase pressure tune Section valve outlet pressure be maintained at preset pressure identical in step 2, thus stablize back pressure operating condition.
The medicine have the advantages that overhead integral battery thermal management system is not currently applied to compressor return air control The precedent of protection, at most adjusts the start and stop of control compressor by pressure switch, and the variation of ambient temperature will lead to system The frequent variation of refrigerant temperature, the start/stop of compressor controlled by pressure switch, its advantage is that response is rapidly, system one to restriction Pressure will start and stop, but in battery thermal management system, this operating condition can cause system to frequently switch on machine, can moulding system Damage, and crankcase pressure regulating valve does not have this influence then, it may ensure that system continuous and steady operation, will not make halfway System-down stoppage protection.Compared to common air-conditioning system, the temperature change of battery thermal management system is more quick and violent. This fast-changing temperature can cause compressor return air rapid change in pressure, damage to compressor, so adjusting return-air Pressure is that definite value is of great significance to overhead integral battery thermal management system.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Wherein, 1-plate heat exchanger, 2-expansion valves, 2.1-first input ends, the 2.2-the first output end, 2.3-the Two input terminals, 2.4-second output terminals, 3-expansion valve escape pipes, 4-crankcase pressure regulating valves, 5-compressor return air pipes, 6-compressors, 7-expansion valve inlet tubes, 8-ptc heaters, 9-compressor exhaust pipes, 10-condensers, 11-drying bottles.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
In overhead integral battery thermal management unit, when battery temperature quickly changes, cause the temperature of battery coolant liquid Variation rapidly, so as to cause the refrigerant temperature big rise and fall in heat-exchangers of the plate type, from the gaseous coolant of plate heat exchanger out Pressure state is unstable, and compressor return air pressure is fluctuated, easily damages to compressor, can using the device of the invention To handle the refrigerant come out from plate heat exchanger, and it is discharged with level pressure, to play protection compressor, extension makes With the effect in service life.4 air inlet connecting plate type expansion valve escape pipe 3 of crankcase pressure regulating valve, crankcase pressure regulating valve 4 goes out Mouth connect compressor muffler 5, the clammy matchmaker's steam come out from evaporator, whether because of return-air caused by ambient temperature Pressure change or system do not use the caused back pressure variation that is switched on suddenly for a long time, can all adjust in crankcase pressure The adjusting of 4 exit of valve avoids battery thermal management system from causing because of frequent start-stop for definite value to guarantee compressor stable operation Impact to compressor.
For a kind of overhead type battery thermal management assembly compressor protection structure that the above scheme present invention designs, such as Fig. 1 Shown, it includes plate heat exchanger 1, expansion valve 2, expansion valve escape pipe 3, crankcase pressure regulating valve 4, compressor return air pipe 5 With compressor 6, wherein the refrigerant input terminal of plate heat exchanger 1 is used to connect the output end of expansion valve inlet tube 7, board-like to change The first input end 2.1 of the output of condenser connection expansion valve 2 of hot device 1, the first output end 2.2 of expansion valve 2 connect expansion The input terminal of valve escape pipe 3,2 first input end 2.1 of expansion valve are connected to the first output end 2.2 of expansion valve 2;
The input terminal of the output end connection crankcase pressure regulating valve 4 of expansion valve escape pipe 3, crankcase pressure regulating valve 4 Output end connect compressor muffler 5 input terminal, the input terminal of the output end connect compressor 6 of compressor return air pipe 5.
In above-mentioned technical proposal, the battery coolant liquid input terminal of the plate heat exchanger 1 connects water pump output end, board-like to change The input terminal of the battery coolant liquid output end connection ptc heater 8 of hot device 1, the output end of ptc heater 8 access battery pipeline Cooling net.Plate heat exchanger 1 realizes the temperature control to battery by the heat exchange of refrigerant road and cooling fluid path.
In above-mentioned technical proposal, expansion valve 2 is a kind of coolant throttle device, is installed on before plate heat exchanger 1, expansion valve 2 make the liquid refrigerant of medium temperature high pressure become the moist steam of low-temp low-pressure by its throttling, and then refrigerant is in plate heat exchanger 1 Middle absorption heat reaches refrigeration effect.
Crankcase pressure regulating valve 4 is a kind of compressor return air pressure control device, pressure of the general factory setting in 2MPa Power, i.e., the refrigerant to be come by expansion valve escape pipe 3 by expansion valve 2 no matter pressure be it is how many, from crankcase pressure regulating valve 4 The refrigerant that outlet comes out can all be adjusted as a definite value 2MPa.
In above-mentioned technical proposal, the output end of the compressor 6 connects the input of condenser 10 by compressor exhaust pipe 9 End, the output end of condenser 10 connect the second input terminal 2.3 of expansion valve 2 by expansion valve inlet tube 7, and the second of expansion valve 2 The refrigerant input terminal of 2.4 connecting plate type heat exchanger 1 of output end, the second input terminal 2.3 and the second of expansion valve 2 of expansion valve 2 Output end 2.4 is connected to.Compressor 6 is a kind of driven fluid machinery that low-pressure gas is promoted to high pressure gas, is refrigeration system The core apparatus of system.The refrigerant of high temperature and pressure is discharged to exhaust pipe from the refrigerant gas of air intake duct sucking low-temp low-pressure for it Gas provides power for refrigeration cycle.
In above-mentioned technical proposal, the crankcase pressure regulating valve 4 is used to export the refrigerant of constant pressure value.
In above-mentioned technical proposal, the output end of the condenser 10 connects expansion valve inlet tube 7 by drying bottle 11.It is dry Bottle 11 temporarily stores extra refrigerant for removing the moisture in refrigeration system
In above-mentioned technical proposal, the upstream pressure of the second input terminal 2.3 of the expansion valve 2 is 1.3~1.5MPa, temperature It is 40~50 DEG C;The downstream pressure of the second output terminal 2.4 of expansion valve 2 is 0.15~0.25MPa, and temperature is 8~10 DEG C;Expansion The upstream pressure of the first input end 2.1 of valve 2 is 0.15~0.25MPa, and temperature is 13~15 DEG C;First output of expansion valve 2 The downstream pressure at end 2.2 is 0.15~0.25MPa, and temperature is 13~15 DEG C.Expansion valve 2 can be by the liquid of medium temperature high pressure before entrance valve The throttling of state refrigerant becomes the mixing atomized refrigerant of gas-liquid two-phase, it is made sufficiently to exchange heat in plate heat exchanger 1.
A kind of overhead type battery thermal management assembly compressor protection method, it includes the following steps:
Step 1: when temperature of powered cell rises, battery coolant temperature being caused to rise, battery coolant liquid is defeated by water pump It is sent to after plate heat exchanger 1, the battery coolant liquid that temperature rises makes the refrigerant in plate heat exchanger 1 accelerate gasification;Cause Back pressure in compressor return air pipe 5 is substantially increased and (rises to 0.5~0.6MPa from 0.2MPa);
Step 2: crankcase pressure regulating valve 4 retains return-air at this time, makes 4 outlet pressure of crankcase pressure regulating valve It is maintained at preset pressure, to stablize back pressure operating condition;
Step 3: when temperature of powered cell decline, battery coolant temperature being caused to decline, battery coolant liquid is defeated by water pump It is sent to after plate heat exchanger 1, the battery coolant liquid of temperature decline makes the refrigerant in plate heat exchanger 1 slow down gasification (i.e. gas Change slows), cause the back pressure in compressor return air pipe 5 to decline and (drop to 0.1MPa from 0.2MPa), at this point, crankshaft Case pressure-regulating valve 4 carries out storage stream to return-air, make 4 outlet pressure of crankcase pressure regulating valve be maintained at it is identical in step 2 Preset pressure, to stablize back pressure operating condition.
The preset pressure that the crankcase pressure regulating valve 4 exports is 2MPa.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.

Claims (8)

1. a kind of overhead type battery thermal management assembly compressor protection structure, which is characterized in that it include plate heat exchanger (1), Expansion valve (2), expansion valve escape pipe (3), crankcase pressure regulating valve (4), compressor return air pipe (5) and compressor (6), In, the refrigerant input terminal of plate heat exchanger (1) is used to connect the output end of expansion valve inlet tube (7), plate heat exchanger (1) Output of condenser connects the first input end (2.1) of expansion valve (2), and the first output end (2.2) of expansion valve (2) connects expansion The input terminal of valve escape pipe (3), expansion valve (2) first input end (2.1) are connected to the first output end (2.2) of expansion valve (2);
The input terminal of output end connection crankcase pressure regulating valve (4) of expansion valve escape pipe (3), crankcase pressure regulating valve (4) input terminal of output end connect compressor muffler (5), the output end connect compressor (6) of compressor return air pipe (5) Input terminal.
2. overhead type battery thermal management assembly compressor protection structure according to claim 1, it is characterised in that: the plate The battery coolant liquid input terminal of formula heat exchanger (1) connects water pump output end, and the battery coolant liquid output end of plate heat exchanger (1) connects Connect the input terminal of ptc heater (8).
3. overhead type battery thermal management assembly compressor protection structure according to claim 1, it is characterised in that: the pressure The output end of contracting machine (6) connects the input terminal of condenser (10) by compressor exhaust pipe (9), and the output end of condenser (10) is logical The second input terminal (2.3) of expansion valve inlet tube (7) connection expansion valve (2) is crossed, the second output terminal (2.4) of expansion valve (2) is even Connect the refrigerant input terminal of plate heat exchanger (1).
4. overhead type battery thermal management assembly compressor protection structure according to claim 1, it is characterised in that: the song Axle box pressure-regulating valve (4) is used to export the refrigerant of constant pressure value.
5. overhead type battery thermal management assembly compressor protection structure according to claim 3, it is characterised in that: described cold The output end of condenser (10) passes through drying bottle (11) connection expansion valve inlet tube (7).
6. overhead type battery thermal management assembly compressor protection structure according to claim 3, it is characterised in that: described swollen The upstream pressure of the second input terminal (2.3) of swollen valve (2) is 1.3~1.5MPa, and temperature is 40~50 DEG C;The of expansion valve (2) The downstream pressure of two output ends (2.4) is 0.15~0.25MPa, and temperature is 8~10 DEG C;The first input end of expansion valve (2) (2.1) upstream pressure is 0.15~0.25MPa, and temperature is 13~15 DEG C;The valve of the first output end (2.2) of expansion valve (2) Pressure is 0.15~0.25MPa afterwards, and temperature is 13~15 DEG C.
7. a kind of overhead type battery thermal management assembly compressor protection method, which is characterized in that it includes the following steps:
Step 1: when temperature of powered cell rises, battery coolant temperature being caused to rise, battery coolant liquid is transported to by water pump After plate heat exchanger (1), the battery coolant liquid that temperature rises makes the refrigerant vapor in plate heat exchanger (1);Cause to compress Back pressure in machine muffler (5) rises;
Step 2: crankcase pressure regulating valve (4) retains return-air at this time, makes crankcase pressure regulating valve (4) outlet pressure It is maintained at preset pressure, to stablize back pressure operating condition;
Step 3: when temperature of powered cell decline, battery coolant temperature being caused to decline, battery coolant liquid is transported to by water pump After plate heat exchanger (1), the battery coolant liquid of temperature decline makes the refrigerant in plate heat exchanger (1) slow down gasification, causes Back pressure decline in compressor return air pipe (5), at this point, crankcase pressure regulating valve (4) carries out storage stream to return-air, makes crankshaft Case pressure-regulating valve (4) outlet pressure be maintained at preset pressure identical in step 2, thus stablize back pressure operating condition.
8. overhead type battery thermal management assembly compressor protection method according to claim 7, it is characterised in that: the song The preset pressure of axle box pressure-regulating valve (4) outlet is 2MPa.
CN201811590610.6A 2018-12-25 2018-12-25 Overhead type battery thermal management assembly compressor protection structure and protection method Active CN109494430B (en)

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CN109494430B CN109494430B (en) 2024-09-13

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002071226A (en) * 2000-08-25 2002-03-08 Daikin Ind Ltd Refrigerating device
KR200281265Y1 (en) * 2002-02-18 2002-07-13 류옥란 Multi Heat pump system
CN1957215A (en) * 2004-05-18 2007-05-02 开利商业冷藏公司 Hot gas heat treatment system
CN202938559U (en) * 2012-10-31 2013-05-15 深圳市安格斯机械有限公司 Air-cooling type cooling-water machine with high precision
CN103471302A (en) * 2013-08-29 2013-12-25 合肥天鹅制冷科技有限公司 Liquid cooling source with wide-temperature-range liquid supply
CN105593618A (en) * 2013-10-01 2016-05-18 高志沇 Cooling system
CN105644381A (en) * 2015-12-23 2016-06-08 奇瑞汽车股份有限公司 Electric automobile and thermal management system thereof
CN209133648U (en) * 2018-12-25 2019-07-19 武汉松芝车用空调有限公司 Overhead type battery thermal management assembly compressor protection structure

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002071226A (en) * 2000-08-25 2002-03-08 Daikin Ind Ltd Refrigerating device
KR200281265Y1 (en) * 2002-02-18 2002-07-13 류옥란 Multi Heat pump system
CN1957215A (en) * 2004-05-18 2007-05-02 开利商业冷藏公司 Hot gas heat treatment system
CN202938559U (en) * 2012-10-31 2013-05-15 深圳市安格斯机械有限公司 Air-cooling type cooling-water machine with high precision
CN103471302A (en) * 2013-08-29 2013-12-25 合肥天鹅制冷科技有限公司 Liquid cooling source with wide-temperature-range liquid supply
CN105593618A (en) * 2013-10-01 2016-05-18 高志沇 Cooling system
CN105644381A (en) * 2015-12-23 2016-06-08 奇瑞汽车股份有限公司 Electric automobile and thermal management system thereof
CN209133648U (en) * 2018-12-25 2019-07-19 武汉松芝车用空调有限公司 Overhead type battery thermal management assembly compressor protection structure

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