CN218197823U - Whole car thermal management system of new energy automobile - Google Patents
Whole car thermal management system of new energy automobile Download PDFInfo
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- CN218197823U CN218197823U CN202222851574.2U CN202222851574U CN218197823U CN 218197823 U CN218197823 U CN 218197823U CN 202222851574 U CN202222851574 U CN 202222851574U CN 218197823 U CN218197823 U CN 218197823U
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Abstract
The application discloses whole car thermal management system of new energy automobile, including electric drive cooling cycle device, heating cycle device, battery package water circle device and air conditioner cooling system. The whole vehicle heat management system provided by the application can meet the requirements of cooling and heating of the whole vehicle and all main components of a power system under different working modes, effectively reduces energy consumption and improves the starting characteristic of a power source.
Description
Technical Field
The application belongs to the technical field of vehicle thermal management of new energy vehicles, and particularly relates to a whole vehicle thermal management system of a new energy vehicle.
Background
The whole vehicle heat management system is an important auxiliary system for ensuring normal and stable work of all parts of the whole vehicle, and in order to enable a motor, a battery and the like for a vehicle to be in a good working state all the time, the heat management must be reasonably controlled, so that the heat taken away by the cooling system is in an optimal range, and the cooling requirements of the motor, the power battery and the like are met. The working temperature of the motor and the power battery is generally recommended to be between 10 ℃ and 60 ℃, and the requirement on the temperature of the cooling liquid is low.
A simpler and more convenient method is that the electric drive related components such as a motor, a motor controller, a DCDC and the like adopt a set of thermal management system and are controlled by a VCU or an independent control unit; the power battery independently adopts a set of thermal management system and is controlled by the BMS. A set of thermal management system is independently adopted for air conditioning refrigeration; the air-conditioning heating independently uses a set of heat management system. Although the thermal management method is easy to implement, the optimal control of the thermal management system cannot be realized in the global scope, and the energy utilization efficiency of the whole vehicle cannot be reduced. Therefore, the reasonable design of the vehicle thermal management system and the realization of the optimal control are one of the important ways to ensure the efficient and reliable operation of the power system.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application aims to provide a whole vehicle thermal management system of a new energy vehicle, which can solve the technical problems that the traditional thermal management method cannot realize optimal control of the thermal management system in a global scope and cannot avoid reduction of the energy utilization efficiency of the whole vehicle.
In order to solve the technical problem, the present application is implemented as follows:
the utility model provides a whole car thermal management system of new energy automobile, includes:
the electric-driven cooling circulation device comprises a low-temperature cooling radiator, a low-temperature cooling fan, a cooling circulation water pump, a normally-open water valve and a cooling expansion water tank, wherein the low-temperature cooling fan is arranged at the low-temperature cooling radiator, and the cooling circulation water pump is connected with an outlet of the low-temperature cooling radiator through a cooling circulation pipeline; the normally open water valve is connected in series between the cooling circulating water pump and the inlet of the low-temperature cooling radiator through a cooling circulating pipeline; the water filling port of the cooling expansion water tank is connected to a cooling circulation pipeline between the normally open water valve and the low-temperature cooling radiator, and the air outlet of the cooling expansion water tank is connected with the air port of the low-temperature cooling radiator;
the heating circulating device comprises a first normally closed water valve, a high-pressure electric liquid heater, a three-way ball valve, a heating radiator assembly and a heating circulating water pump, wherein an inlet of the first normally closed water valve is connected with a cooling circulating pipeline between the cooling circulating water pump and the normally open water valve through a heating circulating pipeline; the inlet of the high-pressure electric liquid heater is connected with the outlet of the first normally closed water valve through a heating circulating pipe; the inlet of the heating radiator assembly is connected with the outlet of the high-pressure electric liquid heater through the three-way ball valve and the heating circulating pipeline; the heating circulating water pump is connected in series between the outlet of the heating radiator assembly and the inlet of the low-temperature cooling radiator through a heating circulating pipeline;
the battery pack water circulation device comprises a battery pack, a liquid one-way valve, a battery pack loop expansion kettle, a battery pack cooling circulation water pump, a pipeline temperature sensor, a plate heat exchanger and a second normally closed water valve, wherein a cooling water inlet of the battery pack is respectively connected with the three-way ball valve and an outlet of the liquid one-way valve through a battery water cooling pack circulation pipeline; the battery pack cooling circulating water pump, the pipeline temperature sensor and the plate heat exchanger are sequentially connected in series between a cooling water outlet of the battery pack and an inlet of the liquid one-way valve through a battery water cooling pack circulating pipeline; a water filling port and an air pipe of the battery pack loop expansion kettle are respectively connected with a battery water cooling pack circulation pipeline; one end of the second normally closed water valve is connected with a battery water cooling pack circulation pipeline between the pipeline temperature sensor and the plate heat exchanger, and the other end of the second normally closed water valve is connected with a heating circulation pipeline between the heating radiator assembly and the heating circulation water pump; and
the air conditioner cooling device comprises an electric compressor, a condenser, a condensing fan, a high-pressure refrigerant four-way valve, a first refrigerant electromagnetic valve, a front evaporator blower, a front evaporator PTC, a low-pressure refrigerant four-way valve, a second refrigerant electromagnetic valve, an overhead evaporator, an overhead blower and a third refrigerant electromagnetic valve, wherein the low-pressure refrigerant four-way valve, the electric compressor, the condenser and the high-pressure refrigerant four-way valve are sequentially connected through a refrigerant circulating pipeline, and the condensing fan is arranged at the condenser; the high-pressure refrigerant four-way joint is divided into three branches and is respectively connected with the low-pressure refrigerant four-way joint through a front evaporator refrigerant pipeline, a top evaporation refrigerant circulating pipeline and a battery pack refrigerant circulating pipeline; the front evaporator is arranged on a refrigerant pipeline of the front evaporator, and the front evaporator PTC and the front evaporator blower are both arranged at the front evaporator; the overhead evaporator is arranged on the overhead evaporation refrigerant circulating pipeline, and the overhead blower is arranged at the overhead evaporator; the battery pack refrigerant circulating pipeline is connected with the plate heat exchanger; the first refrigerant solenoid valve, the second refrigerant solenoid valve and the third refrigerant solenoid valve are respectively arranged on the front evaporator refrigerant pipeline, the top evaporation refrigerant circulating pipeline and the battery pack refrigerant circulating pipeline.
Optionally, a water filling port and an air pipe of the battery pack loop expansion kettle are respectively connected with a battery water cooling pack circulation pipeline between the liquid one-way valve and the plate heat exchanger.
Optionally, the first refrigerant solenoid valve is located between the high-pressure refrigerant four-way and the front evaporator.
Optionally, the second refrigerant solenoid valve is located between the high-pressure refrigerant cross and the overhead evaporator.
Optionally, the third refrigerant electromagnetic valve is located between the plate heat exchanger and the high-pressure refrigerant four-way.
The beneficial effect of this application is as follows:
firstly, the heat demand of each part of the whole vehicle heat management is distributed according to different needs, and the parts are integrated and shared as much as possible on the premise of meeting the performance requirement, so that the cost of the whole vehicle is controlled, and the arrangement space of the parts is obviously effective;
second, this application is with driving motor cooling system and passenger district heating system, and battery package heating system merges, need the heating in the passenger district, and the battery package needs the heating, make full use of the heat that engine and motor during operation produced. When the heat that the battery produced is less than the heat dissipation capacity, need not to adopt electric heating device and utilize the power supply heat to maintain power battery temperature, reduced the electric energy consumption and preheated through the PTC heater when the temperature is low, effectively utilize inside heat, have more obvious energy-conserving effect in thermal management system's heat preservation winter
Thirdly, the parts adopted by the application are mature products except the control system, the structure is simple, the used heat exchangers and sensors are few, the cost is low, the improvement is easy on the basis of the prior art, and the maintenance is convenient;
fourthly, the whole vehicle heat management system can meet the requirements of cooling and heating of the whole vehicle and all main components of a power system under different working modes, effectively reduces energy consumption and improves the starting characteristic of a power source.
Drawings
In order to more clearly illustrate the technical solutions in the implementation or prior art of the present application, the drawings used in the utility model are briefly introduced below and further detailed with reference to the examples, wherein
Fig. 1 is a schematic structural diagram of a finished automobile thermal management system of a new energy automobile according to an embodiment of the present application;
FIG. 2 is a schematic diagram of an electrically driven cooling system of the system shown in FIG. 1;
FIG. 3 is a schematic view of a heating system in the system shown in FIG. 1;
FIG. 4 is a schematic diagram of a battery pack circulation system in the system of FIG. 1;
FIG. 5 is a schematic view of air conditioning cooling in the system of FIG. 1;
wherein: 1-a low-temperature cooling radiator; 2-a cryogenic cooling fan; 3-cooling the circulating water pump; 4-cooling circulation pipeline; 5-normally open water valve; 6-cooling the expansion tank; 7-a first normally closed water valve; 8-high-pressure electric liquid heater; 9-three-way ball valve; 10 heating radiator assembly; 11 heating circulating water pump; 12-heating circulation pipeline; 13-battery pack; 14-liquid check valve; 15-battery pack loop expansion valve; 16-a battery pack cooling circulating water pump; 17-a line temperature sensor; 18-a plate heat exchanger; 19-circulating pipeline of battery water-cooling pack; 20-a second normally closed water valve; 21-an electric compressor; 22-low pressure refrigerant cross; 23-front evaporator refrigerant pipeline; 24-front evaporator blower; 25-front evaporator; 26-front evaporator PTC; 27-a condensing fan; 28-a condenser; 29-high pressure refrigerant cross; 30-a first refrigerant solenoid valve; 31-second refrigerant solenoid valve; 32-third refrigerant solenoid valve; 33-overhead evaporator; 34-overhead blower; 35-top evaporation refrigerant circulation pipeline; 36-battery pack refrigerant circulation pipeline.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The entire vehicle thermal management system of the new energy vehicle provided by the embodiment of the present application is described in detail through specific embodiments and application scenarios thereof with reference to the accompanying drawings.
Please refer to fig. 1 to 5, which are views illustrating a complete vehicle thermal management system of a new energy vehicle according to an embodiment of the present application, including an electrically driven cooling circulation device, a heating circulation device, a battery-in-water circulation device, and an air-conditioning cooling system.
Electric drive cooling circulation device includes low temperature cooling radiator 1, low temperature cooling fan 2, cooling cycle water pump 3, open water valve 5 and cooling expansion tank 6 always, low temperature cooling fan 1 set up in low temperature cooling radiator 2 department, cooling cycle water pump 3 through cooling cycle pipeline 4 with the exit linkage of low temperature cooling radiator 1.
In some embodiments, the operation modes of the low-temperature cooling fan 1 and the cooling-cycle water pump 2 are divided into an off mode, a low-speed mode and a high-speed mode. Wherein the low gear speed range of the low temperature cooling fan 1 is set between 1000-1500rpm, and the high gear speed range is set between 2000-2500 rpm. The speed range of the low gear of the cooling circulating water pump 2 is usually set to be between 800 rpm and 1200rpm, and the speed range of the high gear is usually set to be between 1800 rpm and 2000 rpm.
The normally open water valve 5 is connected in series between the cooling circulation water pump 3 and the inlet of the low-temperature cooling radiator 1 through a cooling circulation pipeline 4.
The water filling port of the cooling expansion water tank 6 is connected with the cooling circulation pipeline 4 between the normally open water valve 5 and the low-temperature cooling radiator 1, and the air outlet of the cooling expansion water tank 6 is connected with the air port of the low-temperature cooling radiator 1.
The heating circulating device comprises a first normally-closed water valve 7, a high-pressure electric liquid heater 8, a three-way ball valve 9, a heating radiator assembly 10 and a heating circulating water pump 11, wherein an inlet of the first normally-closed water valve 7 is connected with the cooling circulating water pump 3 through a heating circulating pipeline 12, and the cooling circulating pipeline 4 between the normally-open water valves 5 is arranged on the cooling circulating water pump.
The inlet of the high-pressure electric liquid heater 8 is connected with the outlet of the first normally closed water valve 7 through a heating circulating pipe 12.
The inlet of the heating radiator assembly 10 is connected with the outlet of the high-pressure electric liquid heater 8 through the three-way ball valve 9 and the heating circulation pipeline 12.
The heating circulating water pump 11 is connected in series between the outlet of the heating radiator assembly 10 and the inlet of the low-temperature cooling radiator 1 through a heating circulating pipeline 12.
In some embodiments, the operation modes of the heating water circulation pump 11 are divided into an off mode, a low speed mode and a high speed mode. Wherein, the speed range of the low gear is usually set to be between 800 rpm and 1200rpm, and the speed range of the high gear is usually set to be between 1800 rpm and 2000 rpm.
The battery pack water circulation device comprises a battery pack 13, a liquid one-way valve 14, a battery pack loop expansion water kettle 15, a battery pack cooling circulation water pump 16, a pipeline temperature sensor 17, a plate heat exchanger 18 and a second normally closed water valve 20, wherein a cooling water inlet of the battery pack 13 is respectively connected with the three-way ball valve 9 and an outlet of the liquid one-way valve 14 through a battery water cooling pack circulation pipeline 19.
The battery pack cooling circulating water pump 16, the pipeline temperature sensor 17 and the plate heat exchanger 18 are sequentially connected in series between a cooling water outlet of the battery pack 13 and an inlet of the liquid one-way valve 14 through a battery water cooling pack circulating pipeline 19.
And a water filling port and an air pipe of the battery pack loop expansion kettle 15 are respectively connected with a battery water cooling pack circulation pipeline 19.
In some embodiments, the water filling port and the air pipe of the battery pack loop expansion kettle 15 are respectively connected with the battery water pack circulation pipeline 19 between the liquid check valve 14 and the plate heat exchanger 18.
In some embodiments, the battery pack cooling circulating water pump 16 operates in a mode selected from the group consisting of off, low, and high. Wherein, the speed range of the low gear is usually set to be between 800 rpm and 1200rpm, and the speed range of the high gear is usually set to be between 1800 rpm and 2000 rpm.
In some embodiments, the second normally closed water valve 20 is connected to the battery water cooling pack circulation pipeline 19 between the pipeline temperature sensor 17 and the plate heat exchanger 18 at one end, and is connected to the heating circulation pipeline 12 between the heating radiator assembly 10 and the heating circulation water pump 11 at the other end.
The air conditioner cooling device comprises an electric compressor 21, a condenser 28, a condensing fan 27, a high-pressure refrigerant four-way 29, a first refrigerant electromagnetic valve 30, a front evaporator air blower 24, a front evaporator 25, a front evaporator PTC26, a low-pressure refrigerant four-way 22, a second refrigerant electromagnetic valve 31, an overhead evaporator 33, an overhead air blower 34 and a third refrigerant electromagnetic valve 32, wherein the low-pressure refrigerant four-way 22, the electric compressor 21, the condenser 28 and the high-pressure refrigerant four-way 29 are sequentially connected through a refrigerant circulating pipeline (not numbered), and the condensing fan is arranged at the condenser 28.
It should be noted that the energy of the electric compressor 21 and the front evaporator PTC26 is derived from the electric energy of the battery pack 13, and the built-in driving motor is powered by the battery pack 13, so as to drive the electric compressor 21 and the front evaporator PTC26 to operate.
The high-pressure refrigerant four-way joint 29 is divided into three branches and is connected with the low-pressure refrigerant four-way joint 22 through a front evaporator refrigerant pipeline 23, a top evaporation refrigerant circulating pipeline 35 and a battery pack refrigerant circulating pipeline 36.
The front evaporator 25 is disposed on the front evaporator refrigerant pipeline 23, and the front evaporator PTC26 and the front evaporator blower 24 are both disposed at the front evaporator 25.
In some embodiments, the operation modes of the condensing fan 27 are divided into off, low gear and high gear.
The overhead evaporator 33 is disposed on the overhead evaporation refrigerant circulation line 35, and the overhead blower 34 is disposed at the overhead evaporator 33.
The battery pack refrigerant circulation pipeline 36 is connected with the plate heat exchanger 18.
The first refrigerant solenoid valve 30, the second refrigerant solenoid valve 31, and the third refrigerant solenoid valve 32 are respectively disposed on the front evaporator refrigerant pipeline 23, the top evaporation refrigerant circulation pipeline 35, and the battery pack refrigerant circulation pipeline 36.
In some embodiments, the first refrigerant solenoid valve 30 is located between the high pressure refrigerant four-way 29 and the front evaporator 25. The second refrigerant solenoid valve 31 is located between the high pressure refrigerant four-way 29 and the overhead evaporator 33. The third refrigerant solenoid valve 32 is located between the plate heat exchanger 18 and the high-pressure refrigerant four-way 29.
The whole vehicle heat management system of the new energy vehicle provided by the embodiment of the application has the following working principle:
the control method comprises the control of a warming-up process of vehicle cold start, a normal working process of a vehicle and a cooling system of a vehicle stopping process, wherein the control of the cooling system comprises the control of an electric drive cooling system, the control of a battery pack cooling system and the control of an air conditioner cooling system.
Wherein: the control of the cooling system in the warm-up process of the cold start of the vehicle comprises the following steps:
battery package hydrologic cycle coolant control includes:
step 1a, a battery pack cooling circulating water pump 16 operates in a low-rotating-speed mode, and a first normally-closed water valve 7 and a second normally-closed water valve 20 are opened; the cooling liquid drives the motor and the parts of the motor controller in sequence and finally returns to the high-pressure electric liquid heater 8. To further save energy consumption during warm-up, the low-temperature cooling fan 2 is in the off state.
And step 1b, when the temperature of the battery pack 13 is detected to be higher than 25 ℃, preheating is finished, and the operation mode under the normal working condition is entered.
Electrically driven hydronic coolant control comprising:
and step 2a, the cooling circulating water pump 3 runs in a low-rotating-speed mode, and the cooling liquid drives the motor and parts of the motor controller in sequence and finally returns to the high-pressure liquid heater 8. To further save energy consumption during warm-up, the low-temperature cooling fan 2 is in the off state.
And step 2b, when the temperature of the outlet coolant of the cooling circulation pipeline 4 and the temperature of the outlet coolant of the battery water-cooling package circulation pipeline 19 reach above 55 ℃, judging that the engine is warmed up, and enabling the low-temperature cooling fan 2 to run at a low speed.
Heating water circulative cooling liquid control includes:
the 3 rd step high voltage electric liquid heater 8 is turned on in a high power mode, the three-way ball valve 9 is turned off at the side b of the heating radiator assembly 10, and the cooling liquid flows in from the inlet of the battery water cooling pack circulation pipeline 19 in the battery pack 13 to heat the battery pack 13.
And step 3b, when the temperature of the outlet coolant of the cooling circulation pipeline 4 and the temperature of the outlet coolant of the battery water cooling pack circulation pipeline 19 reach above 55 ℃, judging that the engine is warmed up, and operating the low-temperature cooling fan 2 at a low speed. In order to ensure the working efficiency and the heat dissipation effect of the heat dissipation fan and the water pump, the outlet b of the three-way ball valve 9 in the step 1a is gradually closed, the battery pack cooling circulation water pump 16 is closed, the second normally closed water valve 20 is gradually opened, and the outlet c of the three-way ball valve 9 is gradually opened to be fully opened, so that the cooling liquid flowing into the inlet a of the three-way ball valve 9 in the step 1a completely flows through the heating radiator assembly 10 and the heating circulation water pump 11 through the outlet c of the three-way ball valve 9 and then returns to the inlet of the low-temperature cooling radiator 1. If the heating request command of the whole vehicle does not exist, the first normally closed water valve 7, the high-pressure electric liquid heater 8 and the heating circulating water pump 11 are closed.
Control of a vehicle operating under normal operating conditions, comprising:
electrically driven hydronic coolant control comprising:
and 4a, when the battery pack 13 is discharged and the electric drive system works, the cooling circulating water pump 3 is switched on, and the low-gear mode is operated. When the ambient temperature is lower than 0 c and the temperature of the coolant flowing through the cooling circulation line 4 in the driving motor is lower than 20 c, the low temperature cooling fan 2 is turned off to reduce the heat loss of the battery pack 13 because the amount of heat generated is small and the temperature of the air is low. When the environmental temperature is not lower than 0 ℃, or when the temperature sensor acquires that the temperature of the cooling liquid in the cooling circulation pipeline 4 is not lower than 20 ℃, the low-temperature cooling fan 2 is turned on, the low-speed operation is carried out, and the cooling circulation water pump 3 is in a low-speed state. When the temperature of the cooling liquid at the outlet of the cooling circulation pipeline 4 is higher than 440 ℃, the cooling circulation water pump 3 is started to a high gear; when the temperature of the cooling liquid in the cooling circulation pipeline 4 exceeds 50 ℃, the low-temperature cooling fan 2 runs at a high speed, so that the cooling liquid can dissipate heat quickly.
Battery package hydrologic cycle coolant control includes:
and 5a, when the battery pack 13 is in discharge operation, when the ambient temperature is lower than 0 ℃ and the temperature of the cooling liquid flowing through the battery water-cooling pack circulation pipeline 19 in the battery pack 13 is lower than 20 ℃, because the heat generation quantity is low and the air temperature is low, the second normally-closed water valve 20 is closed to cut off the connection between the battery water-cooling pack circulation pipeline 19 and other loops, and the battery pack cooling circulation water pump 16 is in a closed state, so that the heat loss of the battery pack 13 is reduced. When the ambient temperature is not lower than 0 ℃, or when the temperature of the cooling liquid in the battery water cooling package circulating pipeline 19 of the battery package 13 is not lower than 20 ℃ through temperature sensing, the battery package cooling circulating water pump 16 is in a low-speed state. When the temperature of the cooling liquid in the battery water cooling package circulation pipeline 19 of the battery package 13 rises and the temperature of the cooling liquid at the outlet of the battery water cooling package circulation pipeline 19 is higher than 35 ℃, the battery package cooling circulation water pump 16 runs at a high speed.
Cooling system control during vehicle shutdown, comprising:
control of an electrically driven cooling device comprising:
and 6a, the cooling circulation loop 4 is closed after the low-temperature cooling fan 2 and the cooling circulation water pump 3 are powered off due to the fact that the heat load is small.
The control of the air-conditioning cooling system under the warm-up and normal working conditions comprises the following steps:
control when there is a need for cooling in the passenger compartment, comprising:
step 7a, when the temperature of cooling liquid in a battery water-cooling pack circulation pipeline 19 of a battery pack 13 rises and the temperature of cooling liquid at an outlet of the battery water-cooling pack circulation pipeline 19 is higher than 35 ℃, a first refrigerant electromagnetic valve 30, a second refrigerant electromagnetic valve 31 and a third refrigerant electromagnetic valve 32 are opened, in the refrigeration process, a front evaporator air blower 24 is arranged at the top of an air blower 34 and is started, an electric compressor 21 runs in a state of maximum power of 80%, the temperature and the pressure of the refrigerant in an air-conditioning cooling system are raised after passing through the electric compressor 21, heat exchange is carried out between the refrigerant and the environment at a condenser 28, the refrigerant is divided into three paths through a high-pressure refrigerant four-way 29 and flows through a plate heat exchanger 18, a front evaporator 25 and a top evaporator 33 respectively to be evaporated after temperature reduction, and the air after temperature reduction is blown into a passenger compartment by the front evaporator air blower 24 and the top air blower 34; the plate heat exchanger 18 cools the cooling liquid flowing through the plate heat exchanger, and the cooling liquid is sent to the battery pack 13 by the battery pack cooling circulating water pump 16 to be cooled; the three refrigerant branches finally pass through the low-pressure refrigerant four-way 22 and flow back to the inlet of the electric compressor 21 to complete the refrigeration cycle;
when the temperature of the cooling liquid in the battery water cooling pack circulation pipeline 19 of the battery pack 13 rises and the temperature of the cooling liquid at the outlet of the battery water cooling pack circulation pipeline 19 is lower than 25 ℃, the first cooling medium electromagnetic valve 30 and the second cooling medium electromagnetic valve 31 are opened, and the third cooling medium electromagnetic valve 32 is closed. In the refrigeration process, the front evaporator blower 24 and the overhead blower 34 are started, the electric compressor 21 runs in a state of 60% of the maximum power, the refrigerant in the air-conditioning cooling system is heated and pressurized after passing through the electric compressor 21, heat exchange is carried out between the refrigerant and the environment at the condenser 28, the refrigerant is divided into two paths through the high-pressure refrigerant four-way joint 29 after being cooled and then flows through the front evaporator 25 and the overhead evaporator 33 respectively for evaporation, and the air after being cooled is blown into the passenger compartment by the front evaporator blower 24 and the overhead blower 34 for cooling; the two refrigerant branches finally pass through the low-pressure refrigerant four-way 22 and flow back to the inlet of the electric compressor 21 to complete the refrigeration cycle.
Control when passenger cabin has the heating demand includes:
step 8a, when a passenger has a heating demand, the normally open water valve 5 is closed, the first normally closed water valve 7 is opened, the heating circulating water pump 11 runs at a high speed, the fan of the heating radiator assembly 10 is opened, the inlet of the three-way ball valve 9a is fully opened, the outlet of the three-way ball valve b is fully opened, and the outlet of the three-way ball valve c is fully closed; at this time, the cooling liquid of the electrically driven cooling loop flows into the high-voltage electric liquid heater 8 through the cooling circulation pipeline loop 4 after passing through the cooling circulation water pump 3, the high-voltage electric liquid heater 8 adjusts power according to the temperature of the flowing cooling liquid, the temperature of the cooling liquid is raised to 75 ℃, the cooling liquid flows into the heating radiator assembly 10 through the heating circulation pipeline 12 to be radiated to heat a passenger area, the cooling liquid finally flows into the cooling circulation pipeline 4 through the sub-heating circulation water pump 11, and the cooling liquid flows into the cooling circulation water pump 3 after being cooled secondarily by the low-temperature cooling radiator 1 to complete heating circulation.
When the passenger has heating requirement and is in warm-up state, the step 3a is entered, if the engine is working and is in normal working state, the step 8a is entered, and the warm air supply is completed.
The beneficial effect of this application is as follows:
firstly, the heat management system is distributed according to different heat requirements of all parts of the whole vehicle heat management and needs, and parts are integrated as much as possible to share on the premise of meeting performance requirements, so that the cost of the whole vehicle is controlled, and the arrangement space of the parts is obviously effective;
second, this application is with driving motor cooling system and passenger district heating system, and battery package heating system merges, needs the heating in the passenger district, and the battery package needs the heating, make full use of the heat that engine and motor during operation produced. When the heat generated by the battery is less than the heat dissipation capacity, the battery temperature is maintained by utilizing the heat of the power source without adopting an electric heating device, the electric energy consumption is reduced, the battery is preheated by the PTC heater when the temperature is low, the internal heat is effectively utilized, and the battery has more obvious energy-saving effect in the heat preservation of a heat management system in winter
Thirdly, the parts adopted by the method except the control system are mature products, the structure is simple, the used heat exchangers and sensors are few, the cost is low, the method is easy to reform on the basis of the prior art, and the maintenance is convenient;
fourthly, the whole vehicle heat management system can meet the requirement that all main components of a whole vehicle and a power system can meet the refrigerating and heating requirements in different working modes, effectively reduces energy consumption and improves the starting characteristic of a power source.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. The utility model provides a whole car thermal management system of new energy automobile which characterized in that includes:
the electrically-driven cooling circulation device comprises a low-temperature cooling radiator, a low-temperature cooling fan, a cooling circulation water pump, a normally-open water valve and a cooling expansion water tank, wherein the low-temperature cooling fan is arranged at the low-temperature cooling radiator, and the cooling circulation water pump is connected with an outlet of the low-temperature cooling radiator through a cooling circulation pipeline; the normally open water valve is connected in series between the cooling circulating water pump and the inlet of the low-temperature cooling radiator through a cooling circulating pipeline; the water filling port of the cooling expansion water tank is connected to a cooling circulation pipeline between the normally open water valve and the low-temperature cooling radiator, and the air outlet of the cooling expansion water tank is connected with the air port of the low-temperature cooling radiator;
the heating circulating device comprises a first normally closed water valve, a high-pressure electric liquid heater, a three-way ball valve, a heating radiator assembly and a heating circulating water pump, wherein an inlet of the first normally closed water valve is connected with a cooling circulating pipeline between the cooling circulating water pump and the normally open water valve through a heating circulating pipeline; the inlet of the high-pressure electric liquid heater is connected with the outlet of the first normally closed water valve through a heating circulating pipe; the inlet of the heating radiator assembly is connected with the outlet of the high-pressure electric liquid heater through the three-way ball valve and the heating circulating pipeline; the heating circulating water pump is connected in series between the outlet of the heating radiator assembly and the inlet of the low-temperature cooling radiator through a heating circulating pipeline;
the battery pack water circulation device comprises a battery pack, a liquid one-way valve, a battery pack loop expansion kettle, a battery pack cooling circulation water pump, a pipeline temperature sensor, a plate heat exchanger and a second normally closed water valve, wherein a cooling water inlet of the battery pack is respectively connected with the three-way ball valve and an outlet of the liquid one-way valve through a battery water cooling pack circulation pipeline; the battery pack cooling circulating water pump, the pipeline temperature sensor and the plate heat exchanger are sequentially connected in series between a cooling water outlet of the battery pack and an inlet of the liquid one-way valve through a battery water cooling pack circulating pipeline; a water filling port and an air pipe of the battery pack loop expansion kettle are respectively connected with a battery water cooling pack circulation pipeline; one end of the second normally closed water valve is connected with a battery water cooling pack circulation pipeline between the pipeline temperature sensor and the plate heat exchanger, and the other end of the second normally closed water valve is connected with a heating circulation pipeline between the heating radiator assembly and the heating circulation water pump; and
the air conditioner cooling device comprises an electric compressor, a condenser, a condensing fan, a high-pressure refrigerant four-way valve, a first refrigerant electromagnetic valve, a front evaporator blower, a front evaporator PTC, a low-pressure refrigerant four-way valve, a second refrigerant electromagnetic valve, an overhead evaporator, an overhead blower and a third refrigerant electromagnetic valve, wherein the low-pressure refrigerant four-way valve, the electric compressor, the condenser and the high-pressure refrigerant four-way valve are sequentially connected through a refrigerant circulating pipeline, and the condensing fan is arranged at the condenser; the high-pressure refrigerant cross joint is divided into three branches and is connected with the low-pressure refrigerant cross joint through a front evaporator refrigerant pipeline, a top evaporation refrigerant circulating pipeline and a battery pack refrigerant circulating pipeline respectively; the front evaporator is arranged on a refrigerant pipeline of the front evaporator, and the front evaporator PTC and the front evaporator blower are both arranged at the front evaporator; the overhead evaporator is arranged on the overhead evaporation refrigerant circulating pipeline, and the overhead blower is arranged at the overhead evaporator; the battery pack refrigerant circulating pipeline is connected with the plate heat exchanger; the first refrigerant solenoid valve, the second refrigerant solenoid valve and the third refrigerant solenoid valve are respectively arranged on the front evaporator refrigerant pipeline, the top evaporation refrigerant circulating pipeline and the battery pack refrigerant circulating pipeline.
2. The whole vehicle thermal management system of the new energy vehicle as claimed in claim 1, wherein a water filling port and a gas pipe of the battery pack loop expansion kettle are respectively connected with a battery water cooling pack circulation pipeline between the liquid check valve and the plate heat exchanger.
3. The vehicle thermal management system of the new energy vehicle as claimed in claim 1, wherein the first refrigerant solenoid valve is located between the high-pressure refrigerant four-way and the front evaporator.
4. The vehicle thermal management system of the new energy vehicle as claimed in claim 3, wherein the second refrigerant solenoid valve is located between the high-pressure refrigerant cross and the overhead evaporator.
5. The whole vehicle thermal management system of the new energy vehicle as claimed in claim 4, wherein the third refrigerant solenoid valve is located between the plate heat exchanger and the high-pressure refrigerant four-way.
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| CN115489266A (en) * | 2022-10-28 | 2022-12-20 | 湖南大学 | Whole vehicle thermal management system and management method of new energy vehicle |
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