CN117360168A - Temperature control method and system for electric vehicle and computer readable medium - Google Patents
Temperature control method and system for electric vehicle and computer readable medium Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 71
- 238000010438 heat treatment Methods 0.000 claims abstract description 269
- 239000000446 fuel Substances 0.000 claims abstract description 181
- 238000004378 air conditioning Methods 0.000 claims abstract description 104
- 238000009826 distribution Methods 0.000 claims abstract description 78
- 239000000110 cooling liquid Substances 0.000 claims abstract description 70
- 230000006870 function Effects 0.000 claims description 31
- 238000004891 communication Methods 0.000 claims description 22
- 239000002826 coolant Substances 0.000 claims description 20
- 230000008569 process Effects 0.000 claims description 18
- 239000000295 fuel oil Substances 0.000 claims description 10
- 230000003993 interaction Effects 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 6
- 239000010763 heavy fuel oil Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 claims description 2
- 208000034068 Bazex-Dupré-Christol syndrome Diseases 0.000 claims 22
- BCNZYOJHNLTNEZ-UHFFFAOYSA-N tert-butyldimethylsilyl chloride Chemical compound CC(C)(C)[Si](C)(C)Cl BCNZYOJHNLTNEZ-UHFFFAOYSA-N 0.000 claims 22
- NTHFOQKLSZUQTR-OICFXQLMSA-N (4r)-4-[(3r,5s,7r,8r,9s,10s,13r,14s,17r)-3,7-dihydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1h-cyclopenta[a]phenanthren-17-yl]pentanoic acid;sulfuric acid Chemical compound OS(O)(=O)=O.C([C@H]1C[C@H]2O)[C@H](O)CC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@H]([C@@H](CCC(O)=O)C)[C@@]2(C)CC1 NTHFOQKLSZUQTR-OICFXQLMSA-N 0.000 claims 2
- 238000007726 management method Methods 0.000 description 22
- 238000003860 storage Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
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- 238000013500 data storage Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H1/2203—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from burners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H2001/2228—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant controlling the operation of heaters
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention relates to a temperature control method, a temperature control system and a computer readable medium of an electric vehicle, wherein the temperature control method comprises the following steps: judging whether to start the fuel heating controller to heat the cooling liquid of the electric vehicle according to the fuel heating instruction and the current state of the fuel heating controller; if the fuel heating controller is judged to be started, obtaining a cooling liquid target temperature according to an air conditioning target temperature of an air conditioning system and an air conditioning target windshield; obtaining a target heating grade of the fuel heating controller according to the target temperature of the cooling liquid and the current temperature of the cooling liquid, and controlling the fuel heating controller to work according to the target heating grade so as to generate heat; and controlling the distribution proportion of heat between the air conditioning system and the battery according to a preset heat distribution method. The invention can improve the battery endurance mileage of the electric automobile in a low-temperature environment and improve the automobile experience of a user.
Description
Technical Field
The invention mainly relates to the technical field of temperature control of electric vehicles, in particular to a temperature control method and system of an electric vehicle and a computer readable medium.
Background
The battery endurance mileage of the existing electric vehicle such as a pure electric vehicle in a low-temperature environment can be greatly reduced, and the main reason is that the performance of the battery in the low-temperature environment is reduced compared with that in a normal-temperature environment, and the warming of an air conditioner in a passenger cabin in the vehicle can also consume a large amount of battery energy, so that the battery endurance mileage of the electric vehicle in a trip in a winter low-temperature environment is greatly reduced.
Currently, there are some temperature control methods for improving the endurance mileage of a battery, such as a heat pump technology, a driving battery heating technology, a remote-starting battery heating technology, etc., which are used to improve the performance of the battery by heating the battery of an electric vehicle. Although the prior art can temporarily improve the battery life to a certain extent, the heated energy source is from the battery, the energy of the battery is consumed during heating, the battery life can be reduced as a whole, and the problem of poor battery life in a low-temperature environment exists.
Disclosure of Invention
The technical problem to be solved by the application is to provide a temperature control method, a temperature control system and a computer readable medium of an electric vehicle, which can improve the battery endurance mileage of the electric vehicle in a low-temperature environment and improve the vehicle experience of a user.
The technical scheme adopted for solving the technical problems is a temperature control method of an electric vehicle, comprising the following steps: judging whether to start the fuel heating controller to heat the cooling liquid of the electric vehicle according to the fuel heating instruction and the current state of the fuel heating controller; if the fuel heating controller is judged to be started, obtaining a cooling liquid target temperature according to an air conditioning target temperature of an air conditioning system and an air conditioning target windshield; obtaining a target heating grade of the fuel heating controller according to the target temperature of the cooling liquid and the current temperature of the cooling liquid, and controlling the fuel heating controller to work according to the target heating grade so as to generate heat; and controlling a heat distribution ratio between the air conditioning system and the battery according to a preset heat distribution method.
In an embodiment of the present application, the step of determining whether to turn on the fuel heating controller according to the fuel heating command and the current state of the fuel heating controller includes: judging whether the fuel oil heating command is from a cabin controller and/or a battery management system of the electric vehicle; if yes, when the current state of the fuel heating controller meets the preset condition, and when the heating function of the air conditioning system is started and/or the current temperature of the battery is smaller than or equal to the preset battery temperature, starting the fuel heating controller, wherein the preset condition comprises: the fuel heating controller is in a standby state, has no faults, and the percentage of the residual oil is greater than or equal to a preset percentage.
In an embodiment of the present application, the step of determining whether to turn on the fuel heating controller according to the fuel heating command and the current state of the fuel heating controller further includes: judging whether the fuel heating instruction is from a mobile terminal application program of a user; if yes, when the current state of the fuel heating controller meets the preset condition, controlling a relay of the electric vehicle to be closed so as to electrify the electric vehicle; and starting the remote heating functions of the fuel heating controller and the air conditioning system.
In an embodiment of the present application, the air-conditioning target damper includes a plurality of air-conditioning target dampers, and the step of obtaining the cooling liquid target temperature according to the air-conditioning target temperature of the air-conditioning system and the air-conditioning target damper includes: and obtaining the target temperature of the cooling liquid in a first preset relation table according to the corresponding relation between the target temperature of the air conditioner and the target windshield of the air conditioner.
In one embodiment of the present application, the target heating level includes a plurality of target heating levels, and the step of obtaining the target heating level of the fuel heating controller according to the target temperature of the coolant and the current temperature of the coolant includes: and obtaining the target heating grade in a second preset relation table according to the corresponding relation between the target temperature of the cooling liquid and the current temperature of the cooling liquid.
In an embodiment of the present application, the step of controlling the distribution ratio of heat between the air conditioning system and the battery according to a preset heat distribution method includes: calculating a first difference value between the target temperature of the air conditioner and the current temperature of the cooling liquid, and obtaining an initial heat distribution proportion A in a third preset relation table according to the corresponding relation between the first difference value and a target windshield of the air conditioner; calculating a second difference between the current temperature of the cooling liquid and the target temperature of the battery, and obtaining a fourth preset relation table according to the second differenceA distribution coefficient B; obtaining a second distribution coefficient C in a fifth preset relation table according to the current temperature of the battery; calculating the heat distribution ratio P to the air conditioning system by using the following formula A And the heat distribution ratio P to the battery B ：
P A ＝A*B*C
P B ＝1-P A
According to the distribution proportion P A And a distribution ratio P B Heat is distributed.
The application still provides a temperature control system of electric motor car for solving above-mentioned technical problem, includes: the whole vehicle controller VCU, the battery management system BMS, the vehicle body controller BDCS, the cabin area controller CDCS, the remote communication module TBOX, the fuel oil heating controller HC and the air conditioning system, and the information interaction process of the temperature control system is configured to: the vehicle body controller BDCS judges whether to start the fuel heating controller HC to heat the cooling liquid of the electric vehicle according to the fuel heating instruction transmitted by the remote communication module TBOX and the current state of the fuel heating controller HC; if the fuel heating controller HC is judged to be started, the vehicle body controller BDCS obtains the target temperature of the cooling liquid according to the target temperature of the air conditioner and the target windshield of the air conditioner; the vehicle body controller BDCS obtains a target heating grade of the fuel heating controller HC according to the target temperature of the cooling liquid and the current temperature of the cooling liquid, and controls the fuel heating controller HC to work according to the target heating grade so as to generate heat; the vehicle body controller BDCS controls the switching ratio of the three-way valve according to a preset heat distribution method so as to control the distribution ratio of heat between the air conditioning system and the battery of the battery management system BMS.
In an embodiment of the present application, during the process that the vehicle body controller BDCS determines whether to turn on the fuel heating controller HC according to the fuel heating command transmitted by the remote communication module TBOX and the current state of the fuel heating controller HC: the vehicle body controller BDCS judges whether the fuel heating command is from the cabin domain controller CDCS and/or the battery management system BMS; if yes, when the current state of the fuel heating controller HC meets the preset condition, and when the heating function of the air conditioning system is started and/or the current temperature of the battery is less than or equal to the preset battery temperature, the vehicle body controller BDCS starts the fuel heating controller HC, wherein the preset condition comprises: the fuel heating controller HC is in a standby state, has no malfunction, and the percentage of the remaining fuel amount is greater than or equal to a preset percentage.
In an embodiment of the present application, in the process that the vehicle body controller BDCS determines whether to turn on the fuel heating controller HC according to the fuel heating command transmitted by the remote communication module TBOX and the current state of the fuel heating controller HC, the method further includes: the vehicle body controller BDCS judges whether the fuel heating instruction is from a mobile terminal application program of a user; if yes, requesting a high-voltage instruction from the whole vehicle controller VCU by the vehicle body controller BDCS when the current state of the fuel heating controller HC meets the preset condition; the whole vehicle controller VCU sends a high-voltage instruction to the battery management system BMS; the battery management system BMS controls the relay of the electric vehicle to be closed so as to electrify the electric vehicle; the vehicle body controller BDCS turns on the remote heating function of the fuel heating controller HC and the air conditioning system.
In an embodiment of the present application, the air-conditioning target damper includes a plurality of air-conditioning target dampers, and in the process that the vehicle body controller BDCS obtains the cooling liquid target temperature according to the air-conditioning target temperature of the air-conditioning system and the air-conditioning target damper: and the vehicle body controller BDCS obtains the target temperature of the cooling liquid in a first preset relation table according to the corresponding relation between the target temperature of the air conditioner and the target windshield of the air conditioner.
In an embodiment of the present application, the target heating level includes a plurality of, in the process that the vehicle body controller BDCS obtains the target heating level of the fuel heating controller HC from the coolant target temperature and the coolant current temperature: and the vehicle body controller BDCS obtains the target heating grade from a second preset relation table according to the corresponding relation between the target temperature of the cooling liquid and the current temperature of the cooling liquid.
In an embodiment of the present application, in the process that the vehicle body controller BDCS controls the switching ratio of the three-way valve according to the preset heat distribution method: the vehicle body controller BDCS calculates a first difference value between the target temperature of the air conditioner and the current temperature of the cooling liquid, and obtains initial heat in a third preset relation table according to the corresponding relation between the first difference value and the target windshield of the air conditionerA distribution ratio A; the vehicle body controller BDCS calculates a second difference value between the current temperature of the cooling liquid and the target temperature of the battery, and a first distribution coefficient B is obtained in a fourth preset relation table according to the second difference value; the vehicle body controller BDCS obtains a second distribution coefficient C in a fifth preset relation table according to the current temperature of the battery; the vehicle body controller BDCS calculates the heat distribution ratio P to the air conditioning system using the following formula A And the heat distribution ratio P to the battery B ：
P A ＝A*B*C
P B ＝1-P A
The vehicle body controller BDCS is according to the distribution proportion P A And a distribution ratio P B The switching ratio of the three-way valve is controlled to control the distribution ratio of heat between the air conditioning system and the battery of the battery management system BMS.
The present application also proposes a computer readable medium storing computer program code which, when executed by a processor, implements a temperature control method for an electric vehicle as above.
According to the technical scheme, whether the fuel heating controller is started or not can be automatically judged according to the fuel heating instructions from different sources and the current state of the fuel heating controller, so that heat is provided for a battery of the electric vehicle; after the fuel heating controller is determined to be started, the target heating grade of the fuel heating controller is determined by comprehensively considering the air conditioning target temperature set by a user, the air conditioning target windshield and the current temperature of the cooling liquid, and after the fuel heating controller is correspondingly controlled to work to generate heat, the distribution proportion of the heat between an air conditioning system and a battery is controlled according to a preset heat distribution method, so that the air conditioning heating requirement of the user and the heating requirement of the battery can be simultaneously met in a low-temperature environment. According to the method and the device, the battery endurance mileage of the electric automobile in the low-temperature environment can be improved, and the automobile use experience of a user is improved.
Drawings
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below, wherein:
FIG. 1 is an exemplary flow chart of a method of controlling temperature of an electric vehicle in accordance with an embodiment of the present application;
FIG. 2 is a schematic diagram of a temperature control system of an electric vehicle according to an embodiment of the present application;
fig. 3 is a system block diagram of a temperature control system of an electric vehicle according to an embodiment of the present application.
Detailed Description
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced otherwise than as described herein, and therefore the present application is not limited to the specific embodiments disclosed below.
As used in this application and in the claims, the terms "a," "an," "the," and/or "the" are not specific to the singular, but may include the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that the steps and elements are explicitly identified, and they do not constitute an exclusive list, as other steps or elements may be included in a method or apparatus.
Flowcharts are used in this application to describe the operations performed by systems according to embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed in order precisely. Rather, the various steps may be processed in reverse order or simultaneously. At the same time, other operations are added to or removed from these processes.
The application provides a temperature control method of an electric vehicle, which can be applied to a pure electric vehicle provided with a fuel heating controller HC (Heating Controller), and the fuel heating controller is controlled to heat cooling liquid of the electric vehicle, so that heat is supplied to a battery and an air conditioning system of the electric vehicle through the cooling liquid. For example, the temperature control method of the electric vehicle can be applied to a temperature control system of the electric vehicle, and the temperature control method can be operated at a vehicle end, for example, in a controller of the vehicle and also can be operated in a cloud platform. When the temperature control method is operated on the cloud platform, the vehicle-end data and the cloud platform data interact through a wireless network, and the cloud platform can comprise private cloud, public cloud, hybrid cloud, community cloud, distributed cloud, interconnected cloud, multiple clouds and the like or any combination thereof. The present application does not limit the operating environment of the temperature control method.
Here, referring to fig. 2, which is a schematic diagram illustrating a temperature control system of an electric vehicle according to an embodiment of the present application, referring to fig. 2, the temperature control system 200 includes an overall vehicle controller VCU (Vehicle Control Unit), a battery management system BMS (Battery Management System), a vehicle body controller BDCS (Body Domain Control System), a cabin controller CDCS (Cockpit Domain Control System), a remote communication module TBOX (Telematics BOX), a fuel heating controller HC, and an air conditioning system 201. In practice, the temperature control system 200 may further include a thermistor PTC (Positive Temperature Coefficient) and a meter controller ICU (Instrumentation Control Unit), the thermistor PTC and the meter controller ICU not being shown in fig. 2, wherein the thermistor PTC generates heat during operation using battery power and the fuel heating controller HC generates heat during operation using fuel, and the meter controller ICU is configured to display a portion of the vehicle information to the electric vehicle user.
Illustratively, referring to fig. 2, the cabin controller CDCS corresponds to a large-screen controller in the vehicle, and a fuel heating switch is disposed on the cabin controller CDCS for a user to locally turn on a heating function in the vehicle. After the temperature control system 200 of the electric vehicle is powered on, if the user clicks the heating function through the large screen in the vehicle, the cabin controller CDCS will send the state of the fuel heating switch to the remote communication module TBOX in real time. The mobile terminal application program APP (Application) of the user is also provided with a fuel heating switch for the user to remotely start the heating function, and the APP end can send the state of the fuel heating switch to the remote communication module TBOX in real time. The remote communication module TBOX can synchronize the display states of the fuel heating switches of the CDCS end and the user APP end of the cabin controller in the vehicle, so that a synchronous interface is presented to a user to avoid misoperation of the user, and the vehicle experience of the user can be improved. In practical application, the fuel heating switch can be set to be effective this time when being started, the state of the switch is not memorized after the electric vehicle is powered down, and the fuel heating switch is turned off by default after the electric vehicle is powered up next time.
Illustratively, in practical applications, the cabin controller CDCS will send the on-off state, the mode state, the set temperature, the set windshield of the air conditioning system 201 to the vehicle body controller BDCS in real time; the battery management system BMS may send the current operating state (e.g., discharge state and charge state) of the battery to the body controller BDCS in real time; the fuel heating controller HC can send the percentage of the residual fuel to the meter controller ICU in real time, so that the meter can display the residual fuel to a user in real time; the fuel heating controller HC also sends the current state, the fault level, and the percentage of the remaining fuel amount to the vehicle body controller BDCS in real time, and the fuel heating controller HC can respond to the control request of the vehicle body controller BDCS in real time.
The temperature control method of the electric vehicle of the present application may be performed by the interaction of the control signals by the respective components in the temperature control system 200 of the electric vehicle of the present application. The specific interaction of the components in the temperature control system 200 will be described later.
Fig. 1 is an exemplary flowchart of a temperature control method of an electric vehicle according to an embodiment of the present application, and referring to fig. 1, the temperature control method of an electric vehicle according to the embodiment includes the steps of:
Step S110: judging whether to start the fuel heating controller to heat the cooling liquid of the electric vehicle according to the fuel heating instruction and the current state of the fuel heating controller.
Step S120: and if the fuel heating controller is judged to be started, obtaining the target temperature of the cooling liquid according to the target temperature of the air conditioner and the target windshield of the air conditioner.
Step S130: and obtaining a target heating grade of the fuel heating controller according to the target temperature of the cooling liquid and the current temperature of the cooling liquid, and controlling the fuel heating controller to work according to the target heating grade so as to generate heat.
Step S140: and controlling the distribution proportion of heat between the air conditioning system and the battery according to a preset heat distribution method.
The following describes the above steps S110 to S140 in detail:
in step S110, it is determined whether to turn on the fuel heating controller to heat the coolant of the electric vehicle according to the fuel heating command and the current state of the fuel heating controller. Illustratively, the source of the fuel heating instructions of the present application may be a cabin controller, a battery management system and a user's cell phone APP within the vehicle. When the battery is in a discharged state and the current temperature of the battery is less than or equal to a preset battery temperature (e.g., 5 degrees celsius), the battery management system may automatically send a fuel heating command to the body controller to request heating.
In some embodiments, the step of determining whether to turn on the fuel heating controller based on the fuel heating command and the current state of the fuel heating controller comprises:
step S111a: judging whether the fuel oil heating command is from a cabin controller and/or a battery management system of the electric vehicle;
step S112a: if yes, when the current state of the fuel heating controller meets the preset condition, and when the heating function of the air conditioning system is started and/or the current temperature of the battery is smaller than or equal to the preset battery temperature, starting the fuel heating controller, wherein the preset condition comprises: the fuel heating controller is in a standby state, has no fault, and has a percentage of remaining fuel greater than or equal to a preset percentage (e.g., 5%).
Illustratively, in the foregoing step S111a, when the fuel heating command is from the cabin controller and/or the battery management system of the electric vehicle, it corresponds to control logic that executes the vehicle local on heating function. If the fuel heating controller is judged not to be started according to the judging conditions, the starting failure information is sent to a large screen of the cabin controller, and the user is informed of the failure of starting the fuel heating function through the large screen. In practical application, if the heating function of the vehicle air conditioning system is not started, a user can be reminded of' after the fuel heating function is started, the heating function of the air conditioner is automatically started, whether the heating function is started or not is confirmed, and if the user selects not to start the heating function of the air conditioner, the fuel heating function is not started; if the user selects to confirm to start the air-conditioning heating function, the air-conditioning heating function and the fuel heating function are started simultaneously, so that after the fuel heating controller works, heat is provided for an air-conditioning system and a battery simultaneously, the heat of a vehicle can be kept in a relatively balanced state, the requirement of the user on using the air-conditioning heating can be met in a low-temperature environment, and the vehicle using experience of the user is improved.
In some embodiments, the step of determining whether to turn on the fuel heating controller based on the fuel heating command and the current state of the fuel heating controller further comprises:
step S111b: judging whether the fuel heating instruction is from a mobile terminal application program of a user;
step S112b: if yes, when the current state of the fuel heating controller meets the preset condition, controlling a relay of the electric vehicle to be closed so as to electrify the electric vehicle;
step S113b: and starting the remote heating functions of the fuel heating controller and the air conditioning system.
For example, the preset condition in step S112b may be the same as the preset condition described in the previous step S112a, that is, the fuel heating controller is in a standby state, has no malfunction, and the percentage of the remaining fuel amount is equal to or greater than the preset percentage. In step S111b, when the fuel heating command is from the user' S mobile terminal application, it corresponds to control logic for executing the vehicle remote on heating function.
Referring to fig. 2, in an exemplary embodiment, when the vehicle body controller BDCS determines that the fuel heating controller can be turned on according to a remote command of the mobile phone APP of the user and a corresponding preset condition, the vehicle body controller BDCS requests the vehicle power supply to be started from the vehicle controller VCU. The vehicle controller VCU receives the instruction and then sends an upper high voltage instruction to the battery management system BMS, and the battery management system BMS correspondingly controls the high voltage relay (not shown) to be closed so as to complete the upper high voltage function. After the high voltage is successful, the vehicle controller VCU sends a high-voltage closed instruction to the vehicle body controller BDCS, and the vehicle body controller BDCS confirms that the temperature control system 200 is electrified after receiving the instruction, so that the heating functions of the fuel heating controller HC and the remote air conditioner are further started.
In step S120, if it is determined that the fuel heating controller is turned on, the coolant target temperature is obtained from the air conditioning target temperature and the air conditioning target damper of the air conditioning system. In an exemplary embodiment, after determining that the fuel heating controller can be turned on, the thermistor of the vehicle can be controlled to prohibit operation, and only the fuel heating controller is allowed to operate, so that the power consumption of the battery can be saved, and the endurance mileage of the battery can be further improved.
In some embodiments, the air conditioning target damper includes a plurality of air conditioning target dampers, and the step of obtaining the cooling liquid target temperature from the air conditioning target temperature of the air conditioning system and the air conditioning target damper includes: and obtaining the target temperature of the cooling liquid in a first preset relation table according to the corresponding relation between the target temperature of the air conditioner and the target windshield of the air conditioner. Illustratively, the air-conditioning target temperature and the air-conditioning target damper may be set by the user, and the air-conditioning target damper may be set to a first damper to a sixth damper, and the first preset relationship table is shown in table 1 below.
Table 1 air conditioner target temperature and air conditioner target windshield relation table
For example, referring to table 1, if the air-conditioning target temperature is 15 degrees and the air-conditioning target damper is a first wind, the cooling liquid target temperature is 20 degrees. In practical application, the corresponding relation of the data in table 1 can be adjusted according to practical situations, and the application is not limited.
In step S130, a target heating level of the fuel heating controller is obtained based on the coolant target temperature and the coolant current temperature, and the fuel heating controller is controlled to operate to generate heat based on the target heating level. By way of example, the target heating level of the fuel heating controller may include a low level, a medium level, and a high level, without limitation of the target heating level. By executing the step S120 and the step S130, it can be comprehensively judged which target heating level the fuel heating controller needs to work according to the air-conditioning target temperature set by the user, the air-conditioning target windshield and the current temperature of the cooling liquid of the vehicle, so that the fuel heating controller can be better utilized, and the working efficiency of the fuel heating controller is improved.
In some embodiments, the target heating level includes a plurality of target heating levels, and the step of obtaining the target heating level of the fuel heating controller based on the target temperature of the coolant and the current temperature of the coolant includes: and obtaining the target heating grade in a second preset relation table according to the corresponding relation between the target temperature of the cooling liquid and the current temperature of the cooling liquid. Illustratively, the second preset relationship table is shown in table 2 below.
TABLE 2 target coolant temperature and Cooling liquid Current temperature relationship Table
For example, referring to Table 2, if the target temperature of the coolant is 20 degrees and the current temperature of the coolant is-20 degrees, the target heating level of the fuel heating controller is advanced. In practical application, the corresponding relation of the data in table 2 can be adjusted according to practical conditions, and the battery temperature can be kept at 25 ℃ or above, when the battery temperature is lower than 20 ℃, the fuel heating controller is controlled to start heating, and after the battery temperature is heated to 25 ℃ or above, the fuel heating controller can be controlled to stop heating.
In step S140, the distribution ratio of heat between the air conditioning system and the battery is controlled according to a preset heat distribution method. By executing step S140, the air conditioning heating requirement of the user and the heating requirement of the battery can be simultaneously met in a low-temperature environment, so that the battery endurance mileage of the electric automobile in the low-temperature environment is improved and the vehicle using experience of the user is improved.
In some embodiments, the step of controlling the distribution ratio of heat between the air conditioning system and the battery according to a preset heat distribution method includes:
step S141: calculating a first difference value between the target temperature of the air conditioner and the current temperature of the cooling liquid, and obtaining an initial heat distribution proportion A in a third preset relation table according to the corresponding relation between the first difference value and a target windshield of the air conditioner;
Step S142: calculating a second difference between the current temperature of the cooling liquid and the target temperature of the battery, and obtaining a first distribution coefficient B in a fourth preset relation table according to the second difference;
step S143: obtaining a second distribution coefficient C in a fifth preset relation table according to the current temperature of the battery;
step S144: calculating the heat distribution ratio P to the air conditioning system by using the following formulas (1) and (2) A And the heat distribution ratio P to the battery B ：
P A ＝A*B*C (1)
P B ＝1- P A (2)
Step S145: according to the distribution proportion P A And a distribution ratio P B Heat is distributed.
Illustratively, a dispensing ratio P is obtained A And a distribution ratio P B And then, the on-off proportion of the three-way valve of the vehicle can be correspondingly controlled so as to distribute heat between the air conditioning system and the battery. The third preset relationship table is shown in table 3 below.
TABLE 3 first difference and air conditioner target windshield relationship table
Referring to table 3, if the first difference is 50 degrees and the air conditioning target damper is six-speed wind, the initial heat distribution ratio a=100%.
Illustratively, the fourth preset relationship table is shown in table 4 below.
TABLE 4 second difference and first distribution coefficient relation table
Referring to table 4, if the second difference is-50 degrees, the first partition coefficient b=0.85. Illustratively, the fifth preset relationship table is shown in table 5 below.
TABLE 5 Battery Current temperature and second partition coefficient relationship Table
Referring to table 5, if the current temperature of the battery is-30 degrees, the second partition coefficient c=0.8. In practical application, the corresponding relation of the data in tables 3 to 5 can be adjusted according to practical situations, and the application is not limited. If the distribution ratio P A If the calculated result of (2) is greater than 100%, setting as P A ＝100％。
For example, in practical application, if the electric vehicle is connected with the charging pile and the battery enters the charging mode, the fuel heating controller is prohibited from being started, and only the thermistor of the vehicle is used for heating, so that the residual fuel in the fuel heating controller can be saved.
According to the technical scheme, whether the fuel heating controller is started or not can be automatically judged according to the fuel heating instructions from different sources and the current state of the fuel heating controller, so that heat is provided for a battery of the electric vehicle; after the fuel heating controller is determined to be started, the target heating grade of the fuel heating controller is determined by comprehensively considering the air conditioning target temperature set by a user, the air conditioning target windshield and the current temperature of the cooling liquid, and after the fuel heating controller is correspondingly controlled to work to generate heat, the distribution proportion of the heat between an air conditioning system and a battery is controlled according to a preset heat distribution method, so that the air conditioning heating requirement of the user and the heating requirement of the battery can be simultaneously met in a low-temperature environment. According to the method and the device, the battery endurance mileage of the electric automobile in the low-temperature environment can be improved, and the automobile use experience of a user is improved.
The interaction process of each component in the temperature control system 200 of the electric vehicle of the present application will be described later, and some of the beneficial effects generated in the interaction process of each component are similar to those described above, and will not be described later. Referring to fig. 2, in some embodiments, the temperature control system 200 of the electric vehicle of the present application includes an overall vehicle controller VCU, a battery management system BMS, a body controller BDCS, a cabin domain controller CDCS, a remote communication module TBOX, a fuel heating controller HC, and an air conditioning system 201, and the information interaction process of the temperature control system 200 is configured to:
the vehicle body controller BDCS judges whether to start the fuel heating controller HC to heat the cooling liquid of the electric vehicle according to the fuel heating instruction transmitted by the remote communication module TBOX and the current state of the fuel heating controller HC;
if the fuel heating controller HC is judged to be started, the vehicle body controller BDCS obtains the target temperature of the cooling liquid according to the target temperature of the air conditioner of the air conditioning system 201 and the target windshield of the air conditioner;
the vehicle body controller BDCS obtains a target heating grade of the fuel heating controller HC according to the target temperature of the cooling liquid and the current temperature of the cooling liquid, and controls the fuel heating controller HC to work according to the target heating grade so as to generate heat;
The vehicle body controller BDCS controls the switching ratio of the three-way valve according to a preset heat distribution method to control the distribution ratio of heat between the air conditioning system 201 and the batteries of the battery management system BMS.
With continued reference to fig. 2, in some embodiments, during the process that the vehicle body controller BDCS determines whether to turn on the fuel heating controller HC according to the fuel heating command transmitted by the remote communication module TBOX and the current state of the fuel heating controller HC: the vehicle body controller BDCS judges whether the fuel heating command is from the cabin domain controller CDCS and/or the battery management system BMS; if yes, when the current state of the fuel heating controller HC meets the preset condition, and when the heating function of the air conditioning system 201 is started and/or the current temperature of the battery is less than or equal to the preset battery temperature, the vehicle body controller BDCS starts the fuel heating controller HC, where the preset condition includes: the fuel heating controller HC is in a standby state, has no malfunction, and the percentage of the remaining fuel amount is greater than or equal to a preset percentage.
In some embodiments, in the process that the vehicle body controller BDCS determines whether to turn on the fuel heating controller HC according to the fuel heating command transmitted by the remote communication module TBOX and the current state of the fuel heating controller HC, the method further includes: the vehicle body controller BDCS judges whether the fuel heating instruction is from a mobile terminal application program of a user; if yes, requesting a high-voltage instruction from the whole vehicle controller VCU by the vehicle body controller BDCS when the current state of the fuel heating controller HC meets the preset condition; the whole vehicle controller VCU sends a high-voltage instruction to the battery management system BMS; the battery management system BMS controls the relay of the electric vehicle to be closed so as to electrify the electric vehicle; the body controller BDCS turns on the remote heating function of the fuel heating controller HC and the air conditioning system 201.
In some embodiments, the air-conditioning target damper includes a plurality of air-conditioning target dampers, and the vehicle body controller BDCS obtains the cooling liquid target temperature in accordance with the air-conditioning target temperature of the air-conditioning system 201 and the air-conditioning target damper: and the vehicle body controller BDCS obtains the target temperature of the cooling liquid in a first preset relation table according to the corresponding relation between the target temperature of the air conditioner and the target windshield of the air conditioner.
In some embodiments, the target heating level includes a plurality of, in the process that the vehicle body controller BDCS obtains the target heating level of the fuel heating controller HC from the coolant target temperature and the coolant current temperature: and the vehicle body controller BDCS obtains the target heating grade from a second preset relation table according to the corresponding relation between the target temperature of the cooling liquid and the current temperature of the cooling liquid.
With continued reference to fig. 2, in some embodiments, during the control of the on-off ratio of the three-way valve by the body controller BDCS according to the preset heat distribution method: the vehicle body controller BDCS calculates a first difference value between the air conditioner target temperature and the current temperature of the cooling liquid, and obtains an initial heat distribution proportion A in a third preset relation table according to the corresponding relation between the first difference value and the air conditioner target windshield; the vehicle body controller BDCS calculates a second difference between the current temperature of the coolant and the target temperature of the battery according to The second difference value obtains a first distribution coefficient B in a fourth preset relation table; the vehicle body controller BDCS obtains a second distribution coefficient C in a fifth preset relation table according to the current temperature of the battery; the vehicle body controller BDCS calculates the heat distribution ratio P to the air conditioning system 201 using the following formula A And the heat distribution ratio P to the battery B ：
P A ＝A*B*C (3)
P B ＝1- P A (4)
The vehicle body controller BDCS is according to the distribution proportion P A And a distribution ratio P B The switching ratio of the three-way valve is controlled to control the distribution ratio of heat between the air conditioning system 201 and the battery of the battery management system BMS.
The application fully utilizes the functions of various vehicle-mounted components to control the temperature of the electric vehicle, can simultaneously meet the air conditioning heating requirement of a user and the heating requirement of a battery under a low-temperature environment, can improve the battery endurance mileage of the electric vehicle under the low-temperature environment, and improves the vehicle use experience of the user.
Fig. 3 is a system block diagram of a temperature control system of an electric vehicle according to an embodiment of the present application. Referring to fig. 3, the temperature control system 300 of the electric vehicle may include a vehicle system 310 and a server computer 320, the vehicle system 310 interacting data with the server computer 320 in a wireless manner through a communication network 330. The vehicle system 310 includes a vehicle communication port 311, a vehicle processor 312, a Read Only Memory (ROM) 313, and a Random Access Memory (RAM) 314, in some embodiments, the vehicle processor 312 may be comprised of one or more processors. The vehicle communication port 311 may enable data communication of the vehicle system 310 with the outside. The vehicle system 310 may also include various forms of program storage units as well as data storage units, such as Read Only Memory (ROM) 313 and Random Access Memory (RAM) 314, capable of storing various data files for processing and/or communication use by the vehicle system 310, as well as possible program instructions for execution by the vehicle processor 312. The vehicle processor 312 executes these instructions to implement the main part of the method. The results processed by the vehicle processor 312 are transmitted to the user device through the vehicle communication port 311 and displayed on the user interface.
The above-described temperature control method of the electric vehicle may be implemented as a processor program, stored in a program storage unit of the vehicle system 310, and loaded into the vehicle processor 312 for execution to implement the temperature control method of the electric vehicle of the present application.
The present application also includes a computer readable medium storing computer program code which, when executed by a processor, implements the temperature control method of an electric vehicle described previously.
When the temperature control method of the electric vehicle is implemented as a computer program, the temperature control method may be stored in a computer-readable storage medium as an article of manufacture. For example, computer-readable storage media may include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips), optical disks (e.g., compact Disk (CD), digital Versatile Disk (DVD), smart cards, and flash memory devices (e.g., electrically erasable programmable read-only memory (EPROM), cards, sticks, key drives)), further, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information.
It should be understood that the embodiments described above are illustrative only. The embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the processors may be implemented within one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), processors, controllers, micro-controllers, microprocessors, and/or other electronic units designed to perform the functions described herein, or a combination thereof.
Some aspects of the present application may be performed entirely by hardware, entirely by software (including firmware, resident software, micro-code, etc.) or by a combination of hardware and software. The above hardware or software may be referred to as a "data block," module, "" engine, "" unit, "" component, "or" system. The processor may be one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital signal processing devices (DAPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, or a combination thereof. Furthermore, aspects of the present application may take the form of a computer product, comprising computer-readable program code, embodied in one or more computer-readable media. For example, computer-readable media can include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, tape … …), optical disk (e.g., compact disk CD, digital versatile disk DVD … …), smart card, and flash memory devices (e.g., card, stick, key drive … …).
The computer readable medium may comprise a propagated data signal with the computer program code embodied therein, for example, on a baseband or as part of a carrier wave. The propagated signal may take on a variety of forms, including electro-magnetic, optical, etc., or any suitable combination thereof. A computer readable medium can be any computer readable medium that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code located on a computer readable medium may be propagated through any suitable medium, including radio, cable, fiber optic cable, radio frequency signals, or the like, or a combination of any of the foregoing.
While the basic concepts have been described above, it will be apparent to those skilled in the art that the foregoing application disclosure is by way of example only and is not intended to be limiting. Although not explicitly described herein, various modifications, improvements, and adaptations of the present application may occur to one skilled in the art. Such modifications, improvements, and modifications are intended to be suggested within this application, and are therefore within the spirit and scope of the exemplary embodiments of this application.
Meanwhile, the present application uses specific words to describe embodiments of the present application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the present application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the present application may be combined as suitable.
In some embodiments, numbers describing the components, number of attributes are used, it being understood that such numbers being used in the description of embodiments are modified in some examples by the modifier "about," approximately, "or" substantially. Unless otherwise indicated, "about," "approximately," or "substantially" indicate that the number allows for a 20% variation. Accordingly, in some embodiments, numerical parameters set forth in the specification and claims are approximations that may vary depending upon the desired properties sought to be obtained by the individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and employ a method for preserving the general number of digits. Although the numerical ranges and parameters set forth herein are approximations that may be employed in some embodiments to confirm the breadth of the range, in particular embodiments, the setting of such numerical values is as precise as possible.
Claims (13)
1. A temperature control method of an electric vehicle, comprising:
judging whether to start the fuel heating controller to heat the cooling liquid of the electric vehicle according to the fuel heating instruction and the current state of the fuel heating controller;
if the fuel heating controller is judged to be started, obtaining a cooling liquid target temperature according to an air conditioning target temperature of an air conditioning system and an air conditioning target windshield;
obtaining a target heating grade of the fuel heating controller according to the target temperature of the cooling liquid and the current temperature of the cooling liquid, and controlling the fuel heating controller to work according to the target heating grade so as to generate heat; and
and controlling the distribution proportion of the heat between the air conditioning system and the battery according to a preset heat distribution method.
2. The method of temperature control according to claim 1, wherein the step of determining whether to turn on the fuel heating controller based on the fuel heating command and the current state of the fuel heating controller includes:
judging whether the fuel oil heating instruction is from a cabin area controller and/or a battery management system of the electric vehicle;
if yes, when the current state of the fuel heating controller meets a preset condition, and when the heating function of the air conditioning system is started and/or the current temperature of the battery is smaller than or equal to the preset battery temperature, starting the fuel heating controller, wherein the preset condition comprises: the fuel oil heating controller is in a standby state, has no faults, and the percentage of the residual oil is greater than or equal to a preset percentage.
3. The method of temperature control according to claim 2, wherein the step of determining whether to turn on the fuel heating controller based on the fuel heating command and the current state of the fuel heating controller further comprises:
judging whether the fuel heating instruction is from a mobile terminal application program of a user;
if yes, when the current state of the fuel heating controller meets the preset condition, controlling a relay of the electric vehicle to be closed so as to electrify the electric vehicle;
and starting the remote heating functions of the fuel oil heating controller and the air conditioning system.
4. The method of claim 1, wherein the air-conditioning target damper includes a plurality of air-conditioning target dampers, and the step of obtaining the cooling liquid target temperature from the air-conditioning target temperature of the air-conditioning system and the air-conditioning target damper includes: and obtaining the target temperature of the cooling liquid in a first preset relation table according to the corresponding relation between the target temperature of the air conditioner and the target windshield of the air conditioner.
5. The temperature control method according to claim 1, wherein the target heating level includes a plurality of, and the step of obtaining the target heating level of the fuel heating controller based on the coolant target temperature and the coolant current temperature includes: and obtaining the target heating grade in a second preset relation table according to the corresponding relation between the target temperature of the cooling liquid and the current temperature of the cooling liquid.
6. The temperature control method according to any one of claims 1 to 5, wherein the step of controlling the distribution ratio of the heat between the air conditioning system and the battery according to a preset heat distribution method comprises:
calculating a first difference value between the air conditioner target temperature and the current temperature of the cooling liquid, and obtaining an initial heat distribution proportion A in a third preset relation table according to the corresponding relation between the first difference value and the air conditioner target windshield;
calculating a second difference value between the current temperature of the cooling liquid and the target temperature of the battery, and obtaining a first distribution coefficient B in a fourth preset relation table according to the second difference value;
obtaining a second distribution coefficient C in a fifth preset relation table according to the current temperature of the battery;
calculating the distribution ratio P of the heat to the air conditioning system by using the following formula A And the distribution ratio P of the heat to the battery B ：
P A ＝A*B*C
P B ＝1-P A
According to the distribution proportion P A And the distribution ratio P B The heat is distributed.
7. The utility model provides a temperature control system of electric motor car, characterized by includes whole car controller VCU, battery management system BMS, automobile body controller BDCS, cabin district controller CDCS, remote communication module TBOX, fuel heating controller HC and air conditioning system, temperature control system's information interaction process is configured as:
The vehicle body controller BDCS judges whether to start the fuel heating controller HC to heat the cooling liquid of the electric vehicle according to the fuel heating instruction transmitted by the remote communication module TBOX and the current state of the fuel heating controller HC;
if the fuel heating controller HC is judged to be started, the vehicle body controller BDCS obtains the target temperature of the cooling liquid according to the target temperature of the air conditioner and the target windshield of the air conditioner;
the vehicle body controller BDCS obtains a target heating grade of the fuel heating controller HC according to the target temperature of the cooling liquid and the current temperature of the cooling liquid, and controls the fuel heating controller HC to work according to the target heating grade so as to generate heat;
the vehicle body controller BDCS controls the switching ratio of the three-way valve according to a preset heat distribution method so as to control the distribution ratio of the heat between the air conditioning system and the batteries of the battery management system BMS.
8. The temperature control system according to claim 7, wherein in the process that the vehicle body controller BDCS determines whether to turn on the fuel heating controller HC according to the fuel heating command transmitted by the remote communication module TBOX and the current state of the fuel heating controller HC:
The vehicle body controller BDCS judges whether the fuel oil heating command is from the cabin area controller CDCS and/or the battery management system BMS;
if yes, when the current state of the fuel oil heating controller HC meets a preset condition, and when the heating function of the air conditioning system is started and/or the current temperature of the battery is less than or equal to a preset battery temperature, the vehicle body controller BDCS starts the fuel oil heating controller HC, wherein the preset condition comprises: the fuel heating controller HC is in a standby state, has no faults, and the percentage of the residual fuel is greater than or equal to a preset percentage.
9. The temperature control system according to claim 8, further comprising, in the process that the vehicle body controller BDCS determines whether to turn on the fuel heating controller HC according to the fuel heating command transmitted by the remote communication module TBOX and the current state of the fuel heating controller HC:
the vehicle body controller BDCS judges whether the fuel oil heating instruction is from a mobile terminal application program of a user;
if yes, when the current state of the fuel heating controller HC meets the preset condition, the vehicle body controller BDCS requests a high-voltage instruction to the whole vehicle controller VCU;
The whole vehicle controller VCU sends the upper high-voltage instruction to the battery management system BMS;
the battery management system BMS controls a relay of the electric vehicle to be closed so as to electrify the electric vehicle;
the vehicle body controller BDCS starts the remote heating functions of the fuel heating controller HC and the air conditioning system.
10. The temperature control system according to claim 7, wherein the air-conditioning target damper includes a plurality of, in the process that the vehicle body controller BDCS obtains the cooling liquid target temperature from the air-conditioning target temperature and the air-conditioning target damper of the air-conditioning system: and the vehicle body controller BDCS obtains the target temperature of the cooling liquid in a first preset relation table according to the corresponding relation between the target temperature of the air conditioner and the target windshield of the air conditioner.
11. The temperature control system according to claim 7, wherein the target heating level includes a plurality of, in the process that the vehicle body controller BDCS obtains the target heating level of the fuel heating controller HC from the coolant target temperature and the coolant current temperature: and the vehicle body controller BDCS obtains the target heating grade from a second preset relation table according to the corresponding relation between the target temperature of the cooling liquid and the current temperature of the cooling liquid.
12. The temperature control system according to any one of claims 7 to 11, wherein during control of the switching ratio of the three-way valve by the vehicle body controller BDCS according to a preset heat distribution method:
the vehicle body controller BDCS calculates a first difference value between the air conditioner target temperature and the current temperature of the cooling liquid, and obtains an initial heat distribution proportion A in a third preset relation table according to the corresponding relation between the first difference value and the air conditioner target windshield;
the vehicle body controller BDCS calculates a second difference value between the current temperature of the cooling liquid and the target temperature of the battery, and a first distribution coefficient B is obtained in a fourth preset relation table according to the second difference value;
the vehicle body controller BDCS obtains a second distribution coefficient C in a fifth preset relation table according to the current temperature of the battery;
the vehicle body controller BDCS calculates the distribution ratio P of the heat to the air conditioning system by using the following formula A And the distribution ratio P of the heat to the battery B ：
P A ＝A*B*C
P B ＝1-P A
The vehicle body controller BDCS is used for controlling the vehicle body according to the distribution proportion P A And the distribution ratio P B The switching ratio of the three-way valve is controlled to control the distribution ratio of the heat between the air conditioning system and the batteries of the battery management system BMS.
13. A computer readable medium storing computer program code, wherein the computer program code, when executed by a processor, implements the temperature control method according to any one of claims 1-6.
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