CN213768201U - Vehicle thermal management system - Google Patents
Vehicle thermal management system Download PDFInfo
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- CN213768201U CN213768201U CN202022842702.8U CN202022842702U CN213768201U CN 213768201 U CN213768201 U CN 213768201U CN 202022842702 U CN202022842702 U CN 202022842702U CN 213768201 U CN213768201 U CN 213768201U
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The disclosure relates to a vehicle thermal management system, which belongs to the field of vehicles and can realize coordination and compatibility of whole vehicle thermal management and battery thermal management. A vehicle thermal management system, comprising: the front motor, the front controller, the two-way valve, the high-power assembly, the rear controller, the rear motor and the first water pump are connected in series; the second water pump is connected with the motor radiator in series and then connected with a series loop formed by the front controller, the front motor and the two-way valve in parallel; a series loop of the high-power assembly, the rear controller and the rear motor is connected with the first water tank in parallel; the compressor, the condenser, the single normal open valve and the air conditioning system are connected in series; a series circuit formed by the single-pass normally-closed valve and the heat exchanger is connected in parallel with a series circuit formed by the single-pass normally-closed valve and the air conditioning system; the third water pump, the water heating heater, the battery box and the heat exchanger are connected in series; the second water tank is connected with the battery box in parallel.
Description
Technical Field
The present disclosure relates to the field of vehicles, and in particular, to a vehicle thermal management system.
Background
At present, the heat management of a Vehicle Control Unit (VCU) includes heating and cooling of a passenger compartment, electrically-driven cooling and cooling of a high-power device, wherein the adopted cooling mode is compressor cooling, and the adopted heating mode is Positive Temperature Coefficient (PTC) air heating mode; thermal Management of a Battery Management System (BMS) includes Battery heating and cooling in a heating mode of heating membrane heating or PTC water heating and in a cooling mode of air cooling or natural cooling.
The existing heat management has the defects that the whole vehicle heat management and the battery heat management are separately and independently executed, so that the system has poor harmony, poor compatibility and poor customer experience.
SUMMERY OF THE UTILITY MODEL
The invention aims to provide a vehicle heat management system, which can realize the coordination and compatibility of the whole vehicle heat management and the battery heat management and improve the customer experience.
According to a first embodiment of the present disclosure, there is provided a vehicle thermal management system comprising: the front motor, the front controller, the two-way valve, the high-power assembly, the rear controller, the rear motor and the first water pump are connected in series; the second water pump is connected with the motor radiator in series and then connected with a series loop formed by the front controller, the front motor and the two-way valve in parallel; a series loop of the high-power assembly, the rear controller and the rear motor is connected with the first water tank in parallel; the compressor, the condenser, the single normal open valve and the air conditioning system are connected in series; a series circuit formed by the single-pass normally-closed valve and the heat exchanger is connected in parallel with a series circuit formed by the single-pass normally-closed valve and the air conditioning system; the third water pump, the water heating heater, the battery box and the heat exchanger are connected in series; the second water tank is connected with the battery box in parallel.
Optionally, the vehicle thermal management system further comprises a cooling fan for cooling the passenger compartment, the electric drive and high power components and the battery.
Optionally, the compressor and the water heating heater are each connected in parallel with a battery to be powered by the battery.
Optionally, the vehicle thermal management system further comprises a temperature sensor for acquiring the temperature of each of the parallel circuits and the series circuits.
Optionally, the vehicle thermal management system further includes a vehicle controller and a battery management system, wherein: the vehicle control unit controls the first water pump and the second water pump in a one-way mode and interacts with the two-way valve; the battery management system is used for controlling the third water pump and the refrigeration fan; and the battery management system and the vehicle control unit control the single-way normally-closed valve and the single-way normally-closed valve when needed.
Alternatively, in the case of passenger compartments requiring refrigeration: the vehicle control unit and the battery management system judge whether the air conditioning system can work normally or not based on the current operating parameters of the air conditioning system; under the condition that the air conditioning system can work normally, the battery management system sends a passenger compartment refrigeration request to the vehicle control unit, the vehicle control unit sends a passenger compartment refrigeration command to the battery management system based on the passenger compartment refrigeration request, and the battery management system sends the passenger compartment refrigeration command to the air conditioning system.
Optionally, in case the passenger compartment requires heating: the vehicle control unit judges whether the air heater can work normally or not based on the current operating parameters of the air heater in the air conditioning system; and under the condition that the air heater can work normally, the vehicle control unit sends an air heater heating command to the air conditioning system.
Alternatively, in the case of batteries requiring refrigeration: and the battery management system sends a battery refrigeration command to the air conditioning system and/or the refrigeration fan according to the refrigeration mode of the battery and the current state information of the compressor.
Optionally, in case the battery requires heating: the vehicle control unit and the battery management system judge whether the water heating heater can work normally based on the current operating parameters of the water heating heater; under the condition that the water heating heater can work normally, the battery management system sends a battery heating request to the vehicle control unit, the vehicle control unit sends a battery heating command to the battery management system based on the battery heating request, and the battery management system controls the water heating heater and the third water pump to work based on the minimum temperature of the single batteries of the batteries after receiving the battery heating command.
Alternatively, in the case of electrically driven and high power components requiring refrigeration: the vehicle control unit determines whether to start the refrigeration fan or not based on the current running condition and charging condition of the vehicle and the core temperature threshold of the electric drive and high-power assembly, and controls the first water pump and the second water pump to work so as to carry out circulating refrigeration.
Through the technical scheme, the problem that the battery thermal management refrigeration of the current system architecture system is insufficient in a high-heat area can be effectively solved on the premise of not increasing the cost, and the simplification of the charging function and the uniformity and the high efficiency of the temperature of the high-voltage battery pack are realized.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a schematic block diagram of a vehicle thermal management system according to one embodiment of the present disclosure.
FIG. 2 illustrates a high-pressure schematic diagram of a vehicle thermal management system according to an embodiment of the present disclosure.
FIG. 3 illustrates a low-pressure schematic diagram of a vehicle thermal management system according to an embodiment of the present disclosure.
FIG. 4 is a control topology schematic of a vehicle thermal management system according to an embodiment of the disclosure.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
FIG. 1 is a schematic block diagram of a vehicle thermal management system according to one embodiment of the present disclosure. As shown in fig. 1, the vehicle thermal management system is constituted as follows: the front motor 1, the front controller 2, the two-way valve 3, the high-power component 4, the rear controller 5, the rear motor 6 and the first water pump 7 are connected in series; the second water pump 8 and the motor radiator 9 are connected in series and then connected in parallel with a series loop formed by the front controller 2, the front motor 1 and the two-way valve 3; a series loop of the high-power component 4, the rear controller 5 and the rear motor 6 is connected with the first water tank 10 in parallel; the compressor 11, the condenser 12, the single normal open valve 13 and the air conditioning system 14 are connected in series; the series circuit formed by the single-pass normally-closed valve 15 and the heat exchanger 16 is connected in parallel with the series circuit formed by the single-pass normally-closed valve 13 and the air conditioning system 14; the third water pump 17, the water heating heater 18, the battery box 19 and the heat exchanger 16 are connected in series with each other; the second water tank 20 is connected in parallel with the battery box 19.
Wherein, the two-way valve 3, the one-way normally-open valve 13 and the one-way normally-closed valve 15 can be electromagnetic valves, mechanical valves and the like. The warming heater 18 may be a PTC warming heater or other type of warming heater. The air conditioning system 14 may include a PTC air heater, an evaporator, a blower, and the like. Those skilled in the art will appreciate that the present disclosure is not so limited.
With continued reference to fig. 1, the vehicle thermal management system also includes a cooling fan 21 for cooling the passenger compartment, the electrically driven and high power components 4 and the battery. The vehicle thermal management system also includes temperature sensors T1, T2, and T3 for collecting temperatures of each of the parallel and series circuits. It should be understood by those skilled in the art that the positions of the respective temperature sensors and the position of the cooling fan 21 in fig. 1 are only examples, and the present disclosure is not limited thereto.
The vehicle thermal management system of fig. 1 enables the cooling of electrically driven and high power components, the cooling and heating of passenger compartments, and the cooling and heating of batteries.
For the thermal management of electrically driven and high power components, there are only cooling requirements. The present disclosure is described with respect to thermal management of a four-wheel drive design vehicle model as an example. Wherein, a circulating pump cooling liquid refrigeration mode can be adopted, and the refrigeration sources are a compressor (for realizing a strong cold mode) and a refrigeration fan (for realizing a weak cold mode). The rear controller 5 and the high-power assembly 4 are preferentially refrigerated, and if the front drive has a refrigeration requirement, the two-way valve 3 can be opened for circulation refrigeration. During the cooling process, the temperature sensors T1 and T2 can be used to monitor the temperature of the loop cooling water and the core temperature of the electric drive and high-power components in real time, so as to switch the cooling mode, such as the strong cooling mode and the weak cooling mode.
Thermal management of the passenger compartment has heating and cooling requirements. Which is implemented primarily by interaction of the air conditioning system 14 with the vehicle control unit. The circulating pump is adopted to cool the condenser of the liquid, and the refrigerating source is a compressor and a fan. Different levels of refrigeration needs are achieved by sending a compressor speed request control and a fan switch to the air conditioning system 14, and controlling the single-pass normally-open valve 13 and the single-pass normally-closed valve 15 (when only passenger compartment refrigeration needs to be performed, the single-pass normally-open valve 13 is required to be open, and the single-pass normally-closed valve 15 is required to be closed, i.e., a default state). In the heating mode, the passenger compartment heating is performed using an air heating mode, wherein PTC air heater enablement may be indirectly controlled to achieve heating of the passenger compartment by sending a PTC air heating request to the air conditioning system 14 and requesting maximum power, using the PTC air heater as the heat source.
The heat management of the battery has heating and refrigerating requirements, and is mainly interactively controlled by a battery management system and a vehicle control unit. And a single circulating pump cooling/heating system is adopted for refrigerating, heating and temperature equalization. The refrigeration sources are a compressor 11 and a refrigeration fan 21, the heating source is liquid heating by a water heating heater 18, a third water pump 17 is controlled to be switched on and off by a heat exchanger 16 and a control one-way normally closed valve 15, and a water heating enabling command is sent and the fan switch is controlled. The maximum and minimum temperature of the battery monomer, the temperature of the water inlet and the water outlet of the module and the temperature of the circulating liquid are monitored in real time by the temperature sensor T3 to be used as a basis for judging whether heating and refrigerating are carried out or not and the grade size, so that the heating and refrigerating requirements are met.
In addition, when the passenger compartment and the battery both need to be cooled, the BMS needs to send a cooling request to the VCU, the VCU controls the one-way normally-open valve 13 and the one-way normally-closed valve 15 according to whether the passenger compartment needs to be cooled and the system state fed back by the air conditioning system 14, and simultaneously sends a cooling command to the BMS, and after receiving the cooling command, the BMS directly sends the cooling request, the total rotating speed (AC + Batt) requested by the compressor and the cooling grade to the air conditioning system 14 through a Controller Area Network (CAN). When the maximum and minimum temperature difference of the battery monomers is large, the third water pump 17 is only started to realize the temperature equalizing function, and the priority is smaller than the heating and refrigerating requirements.
FIG. 2 illustrates a high-pressure schematic diagram of a vehicle thermal management system according to an embodiment of the present disclosure. As shown in fig. 2, the compressor 11 and the water heating heater 18 in the vehicle thermal management system according to the embodiment of the present disclosure are high-power and high-voltage power supply devices, like direct current to direct current (DCDC), electric drive (MCU), and on-board charger (OBC). Therefore, it is also necessary to connect in parallel between the positive and negative electrodes of the high-voltage battery, as with other high-voltage devices, in order to be powered by the high-voltage battery, and to provide a safety device and a relay switch for safety protection.
FIG. 3 illustrates a low-pressure schematic diagram of a vehicle thermal management system according to an embodiment of the present disclosure. As shown in fig. 3, the low-pressure components of the vehicle thermal management system include a temperature sensor, a one-way normally-open valve 13, a one-way normally-closed valve 15, a first water pump 7, a second water pump 8, a two-way valve 3, a third water pump 17, and a cooling fan 21. The cooling fan 21 may be a high-speed low-speed hybrid cooling fan. These low voltage components are interacted with the VCU and BMS by a controller high voltage management unit (HVM), an electric drive (MCU), an air conditioning system 14, a compressor 11 and a water heating heater 18 through a vehicle body can (bcan), a vehicle power can (pcan).
In fig. 3, the air conditioning system 14, the compressor 11, the single-normal-open valve 13, the first water pump 7, the second water pump 8, the two-way valve 3, and the cooling fan 21 are components related to the thermal management of the entire vehicle, and the compressor 11, the water-heating heater 18, the single-normal-open valve 15, the third water pump 17, and the cooling fan 21 are components related to the thermal management of the battery.
In fig. 3, the temperature sensor unidirectionally transmits real-time temperature data to the VCU and the BMS (hereinafter referred to as VBU) through pins; the VBU one-way control electromagnetic valve is opened and closed (drives a switch) by a single-way normally-open valve 13 and a single-way normally-closed valve 15; the VCU controls the first water pump 7 and the second water pump 8 in a one-way mode, and the two-way valve 3 interacts with the VCU; the third water pump 17(PWR control duty ratio) and the cooling fan 21 (high-speed low-speed control) interact with the BMS.
The control principle of the vehicle thermal management system according to the embodiment of the present disclosure is described next with reference to fig. 4.
The vehicle thermal management system according to the embodiment of the disclosure mainly carries out signal interaction by 6 controllers such as a PTC air heater, a PTC water heater, an air conditioning system, a compressor, a VCU and a BMS.
When the passenger compartment is refrigerated, the vehicle control unit and the battery management system judge whether the air conditioning system 14 can work normally or not based on the current operating parameters of the air conditioning system 14; under the condition that the air conditioning system 14 can work normally, the battery management system sends a passenger compartment cooling request to the vehicle control unit, the vehicle control unit sends a passenger compartment cooling command to the battery management system based on the passenger compartment cooling request, and the battery management system sends the passenger compartment cooling command to the air conditioning system 14.
For example, in the case of passenger compartment cooling, the VCU receives information such as evaporator temperature evaporitortemp, pipe pressure pipelineress, air conditioning system operating state ACSysWorkSts, air conditioning cooling request ACReqSts, and air conditioning compressor speed request acppdreq sent by the air conditioning system 14, and forwards the information to the BMS, and the BMS determines information such as the speed ECMPSpeed, voltage ECMPVolt, current ECMPCurrent, state ECMPBaseState, and fault state ECMPFltSts forwarded by the air conditioning system 14 with respect to the compressor 11. Both the VCU and the BMS may determine whether the air conditioning system 14 is currently operating properly from this information. If both the VCU and the BMS determine that the air conditioning system 14 is currently operating properly, then the BMS sends a passenger compartment cooling request to the VCU, which sends a passenger compartment cooling command to the BMS. The BMS then sends a cooling valid bit Cool _ Command, a cooling Command Cool _ Command, a total battery and air conditioner compressor request speed Bat _ AC _ SpeedReq, and a battery cooling Level Bat _ Cool _ Req _ Level to the air conditioning system 14. After receiving the signals, the air conditioning system 14 sends the air conditioning speed setting acpspeed set, the air conditioning start command acpcom, and the air conditioning command valid bit acpcom valid to the compressor 11, so as to control the compressor 11 to operate at the requested speed, thereby meeting the refrigeration requirement.
When the passenger compartment is heated, the vehicle control unit judges whether the air heater can work normally or not based on the current operation parameters of the air heater in the air conditioning system 14; in the event that the air heater is able to function properly, the vehicle control unit sends an air heater heating command to the air conditioning system 14.
For example, in the case of passenger cabin heating, the VCU may receive status PTC _ a _ T _ Sts, operational heating request PTC _ AWorkReq, and current real-time power feedback PTC _ a _ P _ FB forwarded by the air conditioning system 14 with respect to the PTC air heater. Then, the VCU determines whether the PTC air heater can normally operate currently by judging the signals, and if the PTC air heater can normally operate, the VCU sends a PTC air heater Enable signal PTC _ a _ Enable and a maximum heating power limit PTC _ a _ P _ Max to the air conditioning system 14, and the air conditioning system 14 forwards the signals to the PTC air heater after receiving the signals, so that the PTC air heater operates according to the limit power to meet the heating requirement.
When the battery is in thermal management and refrigeration, the battery management system sends a battery refrigeration command to the air conditioning system 14 and/or the refrigeration fan according to the refrigeration mode of the battery and the current state information of the compressor 11.
For example, the BMS determines whether there are cooling requirements for the passenger compartment and the battery based on the forwarded air conditioning system signal and the maximum temperature of the battery cell, and the cooling requirements may be classified into several classes, for example, four classes of 0, 1, 2, and 3 in total, the cooling class without the cooling requirement is 0, the cooling class with only the battery is 1, the cooling class with only the passenger compartment is 2, and the cooling class with both the passenger compartment and the battery is 3. On the premise that the pipe pressure pipe is satisfied, the corresponding operating state of the cooling fan 21 may also be set, for example, 0 may be used to indicate that the fan is not turned on, 1 and 2 may be used to indicate that the low-speed fan is turned on, and 3 may be used to indicate that the high-speed fan is turned on. Meanwhile, battery refrigeration is divided into discharge refrigeration and charge refrigeration, the discharge refrigeration comprises static refrigeration and driving refrigeration, the charge refrigeration comprises AC slow charge refrigeration and DC fast charge refrigeration, each refrigeration is divided into weak refrigeration and strong refrigeration modes, and the modes are started and closed and have different battery monomer temperature threshold intervals, so that working condition judgment is needed firstly. In the charging mode, the priority of the battery refrigeration requirement is higher than that of the refrigeration of the passenger compartment; in the discharging mode, the priority of the refrigerating requirement of the passenger compartment is higher than that of the battery refrigerating. These strategies can all indirectly control the operation of the compressor 11 by the BMS determining the cooling mode and the status signal fed back by the compressor 11, and sending a cooling Command Cool _ Command and a valid bit Cool _ Command valid to the air conditioning system 14, a total requested rotation speed of the battery and the air conditioning compressor Bat _ AC _ SpeedReq, and a battery cooling Level Bat _ Cool _ Req _ Level.
It should be understood by those skilled in the art that the above-described cooling level, fan on control, and other strategies are exemplary and not limiting in this disclosure.
When the battery is used for thermal management heating, the vehicle control unit and the battery management system judge whether the water heating heater 18 can work normally or not based on the current operation parameters of the water heating heater 18; in the case that the water heating heater 18 can normally operate, the battery management system sends a battery heating request to the vehicle control unit, the vehicle control unit sends a battery heating command to the battery management system based on the battery heating request, and the battery management system controls the operation of the water heating heater 18 and the third water pump 17 based on the minimum temperature of the single battery of the battery after receiving the battery heating command.
For example, in the case where the battery needs to be heated, the VCU receives the status PTC _ WSts, the real-time power PTC _ Wpower, the voltage PTC _ WHighVoltage, and the PTC _ WvoltageLowErr from the hot-water heater 18 and forwards them to the BMS. The VCU and the BMS judge whether the water heating heater 18 can be normally operated at present through the signals, and if they can be normally operated, the BMS then transmits a battery heating request to the VCU, and then the VCU transmits a battery heating command to the BMS. The hot-water heating heater 18 can directly send battery module water inlet and delivery port temperature to the BMS, after battery monomer minimum temperature is less than certain threshold value, the BMS can open third water pump 17 at first, then send hot-water heating heater enable command PTC _ Wenable and power setting signal such as PTC _ WpowerSet to warm the heater 18, judge through battery delivery port temperature whether to close the enable, can keep third water pump 17 circulation in certain temperature interval, the enable is closed, open the enable circulation again when delivery port temperature falls below the threshold value, high-efficient rational use heat, satisfy the threshold value when monomer minimum temperature, the enable can be closed, close third water pump 17, in order to withdraw from the heating.
When battery thermal management samming, when the biggest minimum temperature of battery monomer reached the difference in temperature threshold value, BMS need open third water pump 17 and carry out non-heating non-refrigeration cycle, guarantees the homogeneity of battery temperature, avoids local overheated emergence danger, improves the battery life-span.
The electric drive and high power components have only a refrigeration requirement. Generally, the controller sends a device core temperature and charging gun connection signal and a charging request to the VCU through the PCAN, and the VCU can judge the driving condition and the charging condition, judge whether to start a fan (the driving mode starts a high-speed fan, the charging mode starts a low-speed fan) according to a core temperature threshold, and start the first water pump 8 and the second water pump 7 for circulating refrigeration.
Through adopting above-mentioned technical scheme, can realize following beneficial effect: (1) the cooling mode of battery heat management is changed from natural cooling in the prior art into air cooling and compressor refrigeration, and efficient battery refrigeration is realized through the heat exchanger, the control valve and the fan. (2) VCU/BMS all judges heating refrigeration plant state, realizes the redundancy nature of function, and BMS and VCU only have simple REQ and CMD to interact. (3) The charging heat management is used as a working condition parallel to the discharging heat management, and the VCU/BMS jointly controls the refrigeration and heating of the battery, so that the complexity of charging logic design is greatly reduced, and the charging is simple and efficient. (4) The maximum and minimum temperature difference of the single battery is judged, and the circulating water pump is started to circulate, so that the uniformity of the temperature of the battery is realized, and the service life of the single battery is greatly prolonged. (5) Through classifying the heat management refrigeration, the VCU heat management refrigeration (the electric drive and the high-power assembly heat management refrigeration are divided into a running working condition and a charging working condition, and the passenger compartment heat management refrigeration is divided into a charging mode and a discharging mode), and the BMS heat management refrigeration (the battery heat management refrigeration is divided into static refrigeration, running refrigeration, AC slow charging refrigeration and DC fast charging refrigeration). Through the VCU and BMS coordination control strategy and the threshold calibration data writing, the optimal thermal management strategy of the high-voltage battery pack can be realized under the complex working condition, and therefore the battery can exert the best performance.
In general, according to the vehicle thermal management system disclosed by the embodiment of the disclosure, on the premise of not increasing the cost, the problem that the battery thermal management refrigeration of the current system architecture system is insufficient in a high-heat area is effectively solved, and the simplification of the charging function and the uniformity and the high efficiency of the temperature of the high-voltage battery pack are realized.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. A vehicle thermal management system, comprising:
the front motor, the front controller, the two-way valve, the high-power assembly, the rear controller, the rear motor and the first water pump are connected in series;
the second water pump is connected with the motor radiator in series and then connected with a series loop formed by the front controller, the front motor and the two-way valve in parallel;
a series loop of the high-power assembly, the rear controller and the rear motor is connected with the first water tank in parallel;
the compressor, the condenser, the single normal open valve and the air conditioning system are connected in series;
a series circuit formed by the single-pass normally-closed valve and the heat exchanger is connected in parallel with a series circuit formed by the single-pass normally-closed valve and the air conditioning system;
the third water pump, the water heating heater, the battery box and the heat exchanger are connected in series;
the second water tank is connected with the battery box in parallel.
2. The vehicle thermal management system of claim 1, further comprising a cooling fan for cooling the passenger compartment, the electrically driven and high power components, and the battery.
3. The vehicle thermal management system of claim 1, wherein the compressor and the water-heated heater are each connected in parallel with a battery to be powered by the battery.
4. The vehicle thermal management system of claim 1, further comprising a temperature sensor for collecting the temperature of each of the parallel and series circuits.
5. The vehicle thermal management system of claim 2, further comprising a vehicle control unit and a battery management system, wherein:
the vehicle control unit controls the first water pump and the second water pump in a one-way mode and interacts with the two-way valve;
the battery management system is used for controlling the third water pump and the refrigeration fan;
and the battery management system and the vehicle control unit control the single-way normally-closed valve and the single-way normally-closed valve when needed.
6. The vehicle thermal management system of claim 5, wherein, in the event that cooling of the passenger compartment is required:
the vehicle control unit and the battery management system judge whether the air conditioning system can work normally or not based on the current operating parameters of the air conditioning system;
under the condition that the air conditioning system can work normally, the battery management system sends a passenger compartment refrigeration request to the vehicle control unit, the vehicle control unit sends a passenger compartment refrigeration command to the battery management system based on the passenger compartment refrigeration request, and the battery management system sends the passenger compartment refrigeration command to the air conditioning system.
7. The vehicle thermal management system of claim 5, wherein, in the event that the passenger compartment requires heating:
the vehicle control unit judges whether the air heater can work normally or not based on the current operating parameters of the air heater in the air conditioning system;
and under the condition that the air heater can work normally, the vehicle control unit sends an air heater heating command to the air conditioning system.
8. The vehicle thermal management system of claim 5, wherein, in the event that the battery requires cooling:
and the battery management system sends a battery refrigeration command to the air conditioning system and/or the refrigeration fan according to the refrigeration mode of the battery and the current state information of the compressor.
9. The vehicle thermal management system of claim 5, wherein, in the event that the battery requires heating:
the vehicle control unit and the battery management system judge whether the water heating heater can work normally based on the current operating parameters of the water heating heater;
under the condition that the water heating heater can work normally, the battery management system sends a battery heating request to the vehicle control unit, the vehicle control unit sends a battery heating command to the battery management system based on the battery heating request, and the battery management system controls the water heating heater and the third water pump to work based on the minimum temperature of the single batteries of the batteries after receiving the battery heating command.
10. The vehicle thermal management system of claim 5, wherein, in the event that the electric drive and high power components require cooling:
the vehicle control unit determines whether to start the refrigeration fan or not based on the current running condition and charging condition of the vehicle and the core temperature threshold of the electric drive and high-power assembly, and controls the first water pump and the second water pump to work so as to carry out circulating refrigeration.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113942362A (en) * | 2021-09-13 | 2022-01-18 | 宜宾凯翼汽车有限公司 | Heat management system and method for pure electric vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113942362A (en) * | 2021-09-13 | 2022-01-18 | 宜宾凯翼汽车有限公司 | Heat management system and method for pure electric vehicle |
| CN113942362B (en) * | 2021-09-13 | 2024-04-26 | 宜宾凯翼汽车有限公司 | Heat management system and method for pure electric automobile |
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