CN117885499A - Vehicle waste heat heating method, device, equipment and readable storage medium - Google Patents
Vehicle waste heat heating method, device, equipment and readable storage medium Download PDFInfo
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- CN117885499A CN117885499A CN202410075282.5A CN202410075282A CN117885499A CN 117885499 A CN117885499 A CN 117885499A CN 202410075282 A CN202410075282 A CN 202410075282A CN 117885499 A CN117885499 A CN 117885499A
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- 239000002918 waste heat Substances 0.000 title claims abstract description 213
- 238000000034 method Methods 0.000 title claims abstract description 51
- 238000010438 heat treatment Methods 0.000 title claims description 222
- 230000008901 benefit Effects 0.000 claims abstract description 127
- 239000002826 coolant Substances 0.000 claims description 44
- 238000011084 recovery Methods 0.000 claims description 41
- 239000000110 cooling liquid Substances 0.000 claims description 40
- 238000012546 transfer Methods 0.000 claims description 40
- 230000008569 process Effects 0.000 abstract description 8
- 238000013507 mapping Methods 0.000 description 11
- 238000004891 communication Methods 0.000 description 8
- 238000004088 simulation Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
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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
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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
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
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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
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/0073—Control systems or circuits characterised by particular algorithms or computational models, e.g. fuzzy logic or dynamic models
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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
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
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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
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/04—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Software Systems (AREA)
- Fuzzy Systems (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The application discloses a vehicle waste heat supply method, device, equipment and readable storage medium, which relate to the technical field of vehicles, and in the application, the heat supply benefits of waste heat supply to a battery and a passenger cabin of a vehicle are determined based on the current working state of the vehicle; selecting a party with high heat supply benefit from the battery and the passenger cabin as a heat supply target; and waste heat is supplied to the heat supply target. That is, after the vehicle waste heat is recovered, the benefits brought by respectively distributing the waste heat to the battery for heat supply and the benefits brought by distributing the waste heat to the passenger cabin are calculated. And the party with higher profit is selected from the battery and the passenger cabin as a heat supply target to carry out waste heat supply. Compared with the prior art that the heat supply target is determined simply through the temperature threshold value, the method and the device further refine the distribution process of the waste heat, aim at high heat supply income, and select the heat supply target, so that the utilization efficiency of the waste heat of the vehicle is improved, the power consumption of the vehicle is reduced, and the endurance mileage of the vehicle is increased.
Description
Technical Field
The application relates to the technical field of vehicles, in particular to a vehicle waste heat heating method, device and equipment and a readable storage medium.
Background
Along with the gradual rise of the substitution rate of the electric vehicle, the application scale of the pure electric vehicle is larger and larger, and the performance of users on the endurance mileage and the like is more and more interesting. Waste heat recovery is one of important energy-saving measures for electric automobiles. At present, most vehicles control waste heat recovery valves according to the relation between the temperature of motor cooling liquid and a temperature threshold value so as to selectively heat batteries or passenger cabins through the cooling liquid. Although the scheme realizes the waste heat recovery and utilization of the motor, the efficiency of waste heat utilization is lower, and the electric quantity saved by the electric automobile is limited.
Disclosure of Invention
The main aim of the application is to provide a vehicle waste heat heating method, which aims at solving the technical problems that the current vehicle motor waste heat utilization efficiency is lower and the electric quantity saved by an electric automobile is limited.
In order to achieve the above object, the present application provides a vehicle waste heat supply method, including:
determining heat supply benefits of respectively performing waste heat supply on a battery and a passenger cabin of the vehicle based on the current working state of the vehicle;
selecting a party with high heat supply benefit from the battery and the passenger cabin as a heat supply target;
And waste heat is supplied to the heat supply target.
Optionally, the operating states include a first operating state of an electric motor in the vehicle and a second operating state of the battery, and the heating benefit includes a first heating benefit of the battery and a second heating benefit of the passenger compartment;
the step of determining the heating benefits of respectively performing waste heat heating on the battery and the passenger cabin of the vehicle based on the current working state of the vehicle comprises the following steps:
calculating a heating power of a motor in the vehicle based on the motor efficiency and the motor power in the first operating state;
calculating the first heat exchange power of the motor and the motor cooling liquid according to the heating power and the first heat exchange coefficient between the motor and the motor cooling liquid;
determining the first heating benefit based on the first heat exchange power, a second heat exchange coefficient when heating the battery, and the second operating state;
and determining the second heating benefit based on the motor coolant operating parameter and the heat transfer medium of the passenger compartment.
Optionally, the step of determining the first heating benefit based on the first heat exchange power, a second heat exchange coefficient when heating the battery, and the second operating state includes:
Calculating a first amount of battery charge decay for the battery based on a first battery temperature and a battery charge in the second operating state;
determining a second battery temperature of the battery after waste heat heating based on the first battery temperature, the self-heating power of the battery, the first heat exchange power and the second heat exchange coefficient;
calculating a second electric quantity attenuation amount of the battery after waste heat heating based on the second battery temperature and the battery electric quantity;
and determining the first heating benefit based on a difference between the second electric quantity attenuation and the first electric quantity attenuation.
Optionally, the working parameters of the motor coolant include an initial temperature of the motor coolant before heat exchange with the heat transfer medium and a flow rate of the motor coolant;
the step of determining the second heating benefit based on the motor coolant operating parameter and the passenger compartment heat transfer medium comprises:
calculating a second heat exchange power between the motor coolant and the heat transfer medium based on the initial temperature, the medium type of the heat transfer medium, and the flow rate;
and determining the second heating benefit based on the second heat exchange power.
Optionally, the step of selecting a party with high heat supply gain from the battery and the passenger cabin as a heat supply target includes:
taking the battery as the heat supply target under the condition that the first heat supply benefit is greater than or equal to the second heat supply benefit;
and taking the passenger cabin as the heat supply target under the condition that the first heat supply benefit is smaller than the second heat supply benefit.
Optionally, the waste heat supply pipeline of the vehicle comprises a waste heat recovery loop, a battery heating loop, a public heating loop and a passenger cabin heating loop, wherein a flowing medium is exchanged between the waste heat recovery loop and the public heating loop through a four-way valve, a medium is exchanged between the battery heating loop and the public heating loop through a three-way valve, and the public heating loop exchanges heat with the passenger cabin heating loop through a heat exchanger assembly;
the step of supplying heat by waste heat to the heat supply target comprises the following steps:
and waste heat heating is performed on the heating target by adjusting the on state of the four-way valve and the on state of the three-way valve.
Optionally, the four-way valve includes a first interface, a second interface, a third interface and a fourth interface, the three-way valve includes a fifth interface, a sixth interface and a seventh interface, the first interface and the second interface belong to the waste heat recovery loop, the third interface, the fourth interface and the fifth interface belong to the public heat supply loop, the sixth interface belongs to the battery heat supply loop, the seventh interface is a common interface of the battery heat supply loop and the public heat supply loop, the interfaces closest to two ends of the heat exchanger assembly are the fourth interface and the seventh interface respectively, and when the waste heat recovery loop is closed, the cooling liquid after absorbing waste heat in the waste heat recovery loop flows from the first interface to the second interface;
The step of performing waste heat heating on the heating target by adjusting states of the four-way valve and the three-way valve comprises the following steps:
when the heat supply target is a battery, the first interface is controlled to be conducted with the third interface, the fifth interface is controlled to be conducted with the sixth interface, and the fourth interface is controlled to be conducted with the second interface, so that the cooling liquid after absorbing the waste heat flows into the battery heat supply loop preferentially;
and under the condition that the heat supply target is a passenger cabin, controlling the first interface to be communicated with the third interface, controlling the fifth interface to be communicated with the seventh interface, and controlling the fourth interface to be communicated with the second interface so as to enable the cooling liquid after absorbing the waste heat to flow through the heat exchanger assembly preferentially.
To achieve the above object, the present application further provides a vehicle waste heat supply apparatus, the vehicle waste heat supply apparatus includes:
the determining module is used for determining the heat supply benefits of respectively carrying out waste heat supply on the battery and the passenger cabin of the vehicle based on the current working state of the vehicle;
the selecting module is used for selecting a party with high heat supply benefit from the battery and the passenger cabin as a heat supply target;
And the heat supply module is used for supplying heat to the heat supply target by waste heat.
To achieve the above object, the present application further provides a vehicle waste heat supply apparatus, comprising: the system comprises a memory, a processor and a vehicle waste heat heating program which is stored in the memory and can run on the processor, wherein the vehicle waste heat heating program realizes the steps of the vehicle waste heat heating method when being executed by the processor.
In order to achieve the above object, the present application further provides a readable storage medium, on which a vehicle waste heat supply program is stored, which when executed by a processor, implements the steps of the vehicle waste heat supply method as described above.
The embodiment of the application provides a vehicle waste heat heating method, device and equipment and a readable storage medium. In the embodiment of the application, the heat supply benefits of respectively carrying out waste heat supply on the battery and the passenger cabin of the vehicle are determined based on the current working state of the vehicle; selecting a party with high heat supply benefit from the battery and the passenger cabin as a heat supply target; and waste heat is supplied to the heat supply target. That is, after the vehicle waste heat is recovered, the benefits brought by respectively distributing the waste heat to the battery for heat supply and the benefits brought by distributing the waste heat to the passenger cabin are calculated. And the party with higher profit is selected from the battery and the passenger cabin as a heat supply target to carry out waste heat supply. Compared with the prior art that the heat supply target is determined simply through the temperature threshold value, the method and the device further refine the distribution process of the waste heat, aim at high heat supply income, and select the heat supply target, so that the utilization efficiency of the waste heat of the vehicle is improved, the power consumption of the vehicle is reduced, and the endurance mileage of the vehicle is increased.
Drawings
FIG. 1 is a schematic diagram of a device architecture of a hardware operating environment according to an embodiment of the present application;
FIG. 2 is a schematic flow chart of a first embodiment of a method for supplying heat by waste heat of a vehicle according to the present application;
FIG. 3 is a schematic flow chart of a second embodiment of the vehicle waste heat supply method of the present application;
FIG. 4 is a schematic view of a first scenario of a waste heat supply line in the vehicle waste heat supply method of the present application;
FIG. 5 is a schematic diagram of a second scenario of a waste heat supply circuit in the vehicle waste heat supply method of the present application;
fig. 6 is a schematic structural diagram of a vehicle waste heat supply device in the vehicle waste heat supply method of the present application.
The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
As shown in fig. 1, fig. 1 is a schematic device structure diagram of a hardware running environment according to an embodiment of the present application.
The device of the embodiment of the application can be a vehicle, or can be an electronic terminal device such as a PC, a smart phone, a tablet personal computer, a portable computer and the like.
As shown in fig. 1, the apparatus may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also optionally be a storage system separate from the processor 1001 described above.
Optionally, the device may also include a camera, RF (Radio Frequency) circuitry, sensors, audio circuitry, wiFi modules, and the like. Among other sensors, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display screen according to the brightness of ambient light, and a proximity sensor that may turn off the display screen and/or the backlight when the mobile terminal moves to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and the direction when the mobile terminal is stationary, and the mobile terminal can be used for recognizing the gesture of the mobile terminal (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking), and the like; of course, the mobile terminal may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, and the like, which are not described herein.
It will be appreciated by those skilled in the art that the device structure shown in fig. 1 is not limiting of the device and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
As shown in fig. 1, an operating system, a network communication module, a user interface module, and a vehicle waste heat supply program may be included in a memory 1005 as one type of computer storage medium.
In the device shown in fig. 1, the network interface 1004 is mainly used for connecting to a background server, and performing data communication with the background server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call the vehicle waste heat supply program stored in the memory 1005 and perform the following operations:
determining heat supply benefits of respectively performing waste heat supply on a battery and a passenger cabin of the vehicle based on the current working state of the vehicle;
selecting a party with high heat supply benefit from the battery and the passenger cabin as a heat supply target;
and waste heat is supplied to the heat supply target.
Further, the processor 1001 may call the vehicle waste heat supply program stored in the memory 1005, and further perform the following operations:
the operating conditions include a first operating condition of an electric machine in the vehicle and a second operating condition of the battery, the heating benefit including a first heating benefit of the battery and a second heating benefit of the passenger compartment;
The step of determining the heating benefits of respectively performing waste heat heating on the battery and the passenger cabin of the vehicle based on the current working state of the vehicle comprises the following steps:
calculating a heating power of a motor in the vehicle based on the motor efficiency and the motor power in the first operating state;
calculating the first heat exchange power of the motor and the motor cooling liquid according to the heating power and the first heat exchange coefficient between the motor and the motor cooling liquid;
determining the first heating benefit based on the first heat exchange power, a second heat exchange coefficient when heating the battery, and the second operating state;
and determining the second heating benefit based on the motor coolant operating parameter and the heat transfer medium of the passenger compartment.
Further, the processor 1001 may call the vehicle waste heat supply program stored in the memory 1005, and further perform the following operations:
the step of determining the first heating benefit based on the first heat exchange power, a second heat exchange coefficient when heating the battery, and the second operating state includes:
calculating a first amount of battery charge decay for the battery based on a first battery temperature and a battery charge in the second operating state;
Determining a second battery temperature of the battery after waste heat heating based on the first battery temperature, the self-heating power of the battery, the first heat exchange power and the second heat exchange coefficient;
calculating a second electric quantity attenuation amount of the battery after waste heat heating based on the second battery temperature and the battery electric quantity;
and determining the first heating benefit based on a difference between the second electric quantity attenuation and the first electric quantity attenuation.
Further, the processor 1001 may call the vehicle waste heat supply program stored in the memory 1005, and further perform the following operations:
the working parameters of the motor cooling liquid comprise the initial temperature before the motor cooling liquid exchanges heat with the heat transfer medium and the flow rate of the motor cooling liquid;
the step of determining the second heating benefit based on the motor coolant operating parameter and the passenger compartment heat transfer medium comprises:
calculating a second heat exchange power between the motor coolant and the heat transfer medium based on the initial temperature, the medium type of the heat transfer medium, and the flow rate;
and determining the second heating benefit based on the second heat exchange power.
Further, the processor 1001 may call the vehicle waste heat supply program stored in the memory 1005, and further perform the following operations:
the step of selecting a party with high heat supply benefit from the battery and the passenger cabin as a heat supply target comprises the following steps:
taking the battery as the heat supply target under the condition that the first heat supply benefit is greater than or equal to the second heat supply benefit;
and taking the passenger cabin as the heat supply target under the condition that the first heat supply benefit is smaller than the second heat supply benefit.
Further, the processor 1001 may call the vehicle waste heat supply program stored in the memory 1005, and further perform the following operations:
the waste heat supply pipeline of the vehicle comprises a waste heat recovery loop, a battery heating loop, a public heating loop and a passenger cabin heating loop, wherein a flowing medium is exchanged between the waste heat recovery loop and the public heating loop through a four-way valve, a medium is exchanged between the battery heating loop and the public heating loop through a three-way valve, and the public heating loop exchanges heat with the passenger cabin heating loop through a heat exchanger assembly;
the step of supplying heat by waste heat to the heat supply target comprises the following steps:
And waste heat heating is performed on the heating target by adjusting the on state of the four-way valve and the on state of the three-way valve.
Further, the processor 1001 may call the vehicle waste heat supply program stored in the memory 1005, and further perform the following operations:
the four-way valve comprises a first interface, a second interface, a third interface and a fourth interface, the three-way valve comprises a fifth interface, a sixth interface and a seventh interface, the first interface and the second interface belong to the waste heat recovery loop, the third interface, the fourth interface and the fifth interface belong to the public heat supply loop, the sixth interface belongs to the battery heat supply loop, the seventh interface is a shared interface of the battery heat supply loop and the public heat supply loop, the interfaces closest to two ends of the heat exchanger assembly are the fourth interface and the seventh interface respectively, and under the condition that the waste heat recovery loop is closed, cooling liquid after absorbing waste heat in the waste heat recovery loop flows from the first interface to the second interface;
the step of performing waste heat heating on the heating target by adjusting states of the four-way valve and the three-way valve comprises the following steps:
When the heat supply target is a battery, the first interface is controlled to be conducted with the third interface, the fifth interface is controlled to be conducted with the sixth interface, and the fourth interface is controlled to be conducted with the second interface, so that the cooling liquid after absorbing the waste heat flows into the battery heat supply loop preferentially;
and under the condition that the heat supply target is a passenger cabin, controlling the first interface to be communicated with the third interface, controlling the fifth interface to be communicated with the seventh interface, and controlling the fourth interface to be communicated with the second interface so as to enable the cooling liquid after absorbing the waste heat to flow through the heat exchanger assembly preferentially.
Referring to fig. 2, a first embodiment of a vehicle waste heat supply method of the present application includes:
step S10, determining heat supply benefits of respectively carrying out waste heat supply on a battery and a passenger cabin of the vehicle based on the current working state of the vehicle;
it should be noted that, in this embodiment, the above-mentioned vehicle waste heat heating method is mainly applied to an electric vehicle, and the waste heat refers to heat generated when a motor in the electric vehicle works, and objects of waste heat heating in the vehicle include a battery of the vehicle and a passenger cabin of the vehicle. The purpose of supplying heat to the battery is to provide an adaptive temperature for discharging the battery so as to reduce the attenuation of the battery, and the purpose of supplying heat to the passenger cabin is to reduce the power consumption for heating the passenger cabin. When waste heat is recovered, heat generated during the operation of the motor is usually recovered by the motor coolant, and meanwhile, the motor coolant can also be used for cooling the motor. In the current waste heat recovery scheme, the object of heat supply by waste heat is generally selected according to the temperature of the coolant. However, in practical application, different heat supply benefits (i.e. saved electric quantity or different running mileage of the vehicle) may be obtained when heat is supplied to different heat supply objects, so according to the characteristic, the application provides a vehicle waste heat supply method, and whether the recovered waste heat is distributed to a battery for heat supply or to a passenger cabin for heat supply is determined according to the heat supply benefits, so that the utilization efficiency of the waste heat is improved as much as possible.
For example, in practical application, the whole vehicle controller in the vehicle may calculate the heating benefit when performing waste heat heating to the battery and the passenger cabin of the vehicle respectively according to the current working state of the vehicle. For example, the current operation state of the vehicle may include an operation state of the motor, thereby calculating a heating value of the motor. And then the temperature of the battery after the temperature is raised under the condition of only supplying heat to the battery is calculated according to the heating value of the motor and the heat exchange efficiency between the motor and the battery (mainly the heat exchange efficiency from the motor to the cooling liquid and the cooling liquid to the battery in the process). And calculating the reduction amount of the battery electric quantity attenuation after the heat is supplied to the battery, namely, the heat supply benefit of waste heat supply to the battery through the pre-established mapping relation between the temperature and the battery attenuation. The heat supply benefit of the passenger cabin can be calculated according to different heating modes of the passenger cabin, for example, if the passenger cabin is directly heated by the cooling liquid, the heat supply effect of the passenger cabin can be calculated according to the temperature of the cooling liquid (the temperature can be acquired by a sensor on a vehicle), wherein the heat supply effect can be the heat absorbed by the passenger cabin or the temperature which can be reached after the passenger cabin is heated, and the mapping relation between the temperature of the cooling liquid and the heat supply effect can be obtained by testing or simulating in advance, discrete data can be obtained by fitting the discrete data, and the temperature which can be reached after the heat supply can be converted into the electric energy which is consumed by the vehicle-mounted air conditioner to reach the temperature.
Step S20, selecting a party with high heat supply benefit from the battery and the passenger cabin as a heat supply target;
for example, after the benefits of heat supply to the battery and the benefits of heat supply to the passenger compartment are calculated, respectively, the benefits of both sides are compared (wherein, in the case of different benefits units, the measurement units of the two benefits are unified first, for example, the measurement units are converted into the saved electric quantity or the increased endurance mileage, etc.), so that the party with the higher heat supply benefit is selected as the heat supply target from the battery and the passenger compartment. In the case that the two benefits are the same, one party can be selected as a heat supply target, and in the embodiment, the battery can be set as a priority heat supply target so as to ensure that the battery is in a proper working environment.
And step S30, performing waste heat supply on the heat supply target.
For example, the cooling liquid of the motor is controlled to flow into the heat exchange pipeline of the heat supply target or flow into the heat exchange pipeline preferentially. In practical application, the vehicles of different vehicle types or different manufacturers may have different heat recovery and waste heat supply pipeline systems, so that the description is omitted here.
In the embodiment, determining heat supply benefits of respectively performing waste heat supply on a battery and a passenger cabin of a vehicle based on the current working state of the vehicle; selecting a party with high heat supply benefit from the battery and the passenger cabin as a heat supply target; and waste heat is supplied to the heat supply target. That is, after the vehicle waste heat is recovered, the benefits brought by respectively distributing the waste heat to the battery for heat supply and the benefits brought by distributing the waste heat to the passenger cabin are calculated. And the party with higher profit is selected from the battery and the passenger cabin as a heat supply target to carry out waste heat supply. Compared with the prior art that the heat supply target is determined simply through the temperature threshold value, the method and the device further refine the distribution process of the waste heat, aim at high heat supply income, and select the heat supply target, so that the utilization efficiency of the waste heat of the vehicle is improved, the power consumption of the vehicle is reduced, and the endurance mileage of the vehicle is increased.
In a possible embodiment, the operating states include a first operating state of an electric motor in the vehicle and a second operating state of the battery, and the heating benefit includes a first heating benefit of the battery and a second heating benefit of the passenger compartment;
step S110, the step of determining the heating benefit of performing waste heat heating on the battery and the passenger cabin of the vehicle based on the current working state of the vehicle includes:
step S120 of calculating a heating power of the motor in the vehicle based on the motor efficiency and the motor power in the first operation state;
step S130, calculating the first heat exchange power of the motor and the motor cooling liquid according to the heating power and the first heat exchange coefficient between the motor and the motor cooling liquid;
step S140, determining the first heating benefit based on the first heat exchange power, a second heat exchange coefficient when heating the battery, and the second working state;
and step S150, determining the second heat supply benefit based on the motor coolant working parameters and the heat transfer medium of the passenger cabin.
The current operating state of the vehicle includes, for example, a first operating state of the motor in the vehicle and a second operating state of the battery, and accordingly, a heating benefit of the battery is a first heating benefit and a heating benefit of the passenger compartment is a second heating benefit. Wherein, based on the motor efficiency and the motor power in the first operation state, the heating power of the motor in the vehicle may be calculated, for example, heating power=f (P, η1) ×Δt, wherein P is the motor power, η1 is the motor efficiency, f (P, η1) is a calculation function of f (P, η1), Δt is a unit time. And calculating the first heat exchange power of the motor and the motor coolant according to the heating power and the first heat exchange coefficient between the motor and the motor coolant, wherein the first heat exchange coefficient is obtained through simulation or actual test as the hardware conditions (such as heat exchange area, heat conducting material and the like) participating in heat exchange in the vehicle are usually fixed. Correspondingly, in order to improve the accuracy of the calculation of the first heat exchange power, a temperature difference factor may be added when the first heat exchange coefficient is obtained through simulation or test, wherein the temperature difference is a temperature difference between the motor and the cooling liquid (motor cooling liquid), that is, a mapping relationship between the temperature difference and the first heat exchange coefficient is established.
For the first heating benefit, the first heating benefit may be determined by the first heat exchange power, the second heat exchange coefficient when heating the battery, and the second operating state. Wherein the second heat exchange coefficient is a heat exchange coefficient between the coolant and the battery. The second working state mainly comprises the temperature, the electric quantity and the like before the heat supply is carried out on the battery, and the second working state can be used for determining the attenuation of the electric quantity of the battery before and after the heat supply, so that the first heat supply benefit is obtained.
For the second heating benefit, it may be determined by the motor coolant operating parameters and the passenger compartment heat transfer medium. The working parameters of the motor coolant can be directly acquired through sensors configured on the vehicle, for example, the temperature of the coolant, the flow rate of the coolant, and the like, and it is to be noted that in the embodiment, the heat exchange between the coolant and the heat transfer medium is realized through the heat exchanger assembly, and the heat exchange characteristic of the heat exchanger assembly is fixed, so that the heat absorption power of the heat transfer medium is estimated through the working parameters of the motor coolant and the heat transfer medium of the passenger cabin, and the mapping relationship between the working parameters of the motor coolant and the heat transfer medium of the passenger cabin and the heat absorption power of the heat transfer medium can be calculated through experiments or simulations. According to different heating modes of the passenger cabin, the heat absorption power of the heat transfer medium can be directly used as second heat supply benefits, and the second heat supply benefits can be obtained after the heat absorption power is converted.
In a possible embodiment, the step of determining the first heating benefit based on the first heat exchange power, a second heat exchange coefficient when heating the battery, and the second operating state includes:
step S141, calculating a first electric quantity attenuation amount of the battery based on a first battery temperature and a battery electric quantity in the second working state;
step S142, determining a second battery temperature of the battery after waste heat supply based on the first battery temperature, the self-heating power of the battery, the first heat exchange power and the second heat exchange coefficient;
step S143, calculating a second electric quantity attenuation amount of the battery after waste heat heating based on the second battery temperature and the battery electric quantity;
and step S144, determining the first heat supply benefit based on the difference value between the second electric quantity attenuation amount and the first electric quantity attenuation amount.
The first power attenuation amount of the battery is calculated according to the first battery temperature (i.e. the battery temperature before heat supply) and the battery power in the second operating state, wherein the battery power attenuation amount can be obtained through a pre-established mapping table or a mapping formula, and the mapping table or the mapping formula can also be obtained through simulation or actual test, for example, in the case of 100% of the battery power, the battery power attenuation mapping formula is y 1 ＝-0.0055x 1 2 +0.5256x 1 +86.982, where y 1 Is the attenuation of the battery electric quantity, x 1 Is the battery temperature.
After the first electric quantity attenuation is determined, the second battery temperature of the battery after waste heat heating is determined based on the first battery temperature, the self-heating power of the battery, the first heat exchange power and the second heat exchange coefficient. The self-heating power of the battery can be calculated through the battery current I and the battery internal resistance R, the self-heating power and the first heat exchange power can be used as heat absorbed by the battery in a superposition mode, and then the temperature rise of the battery is calculated through the heat absorbed by the superposition mode. For example, the temperature rise Δt is calculated by adding the absorbed heat to the specific heat C, the battery mass m. And adding Wen Sheng T to the first battery temperature to obtain a second battery temperature after waste heat is supplied to the battery. The battery electric quantity attenuation mapping formula can be determined based on the same battery electric quantity, then the battery temperature is substituted into the battery electric quantity attenuation mapping formula to obtain a second electric quantity attenuation quantity of the battery after waste heat heating, and then a difference value between the second electric quantity attenuation quantity and the first electric quantity attenuation quantity is used as a first heating benefit.
In a possible embodiment, the motor coolant operating parameters include an initial temperature of the motor coolant before heat exchange with the heat transfer medium and a flow rate of the motor coolant;
The step of determining the second heating benefit based on the motor coolant operating parameter and the passenger compartment heat transfer medium comprises:
step S151 of calculating a second heat exchange power between the motor coolant and the heat transfer medium based on the initial temperature, the medium type of the heat transfer medium, and the flow rate;
step S152, determining the second heating benefit based on the second heat exchange power.
Exemplary motor coolant operating parameters the initial temperature of the motor coolant before heat exchange with the heat transfer medium and the flow rate of the motor coolant. And calculating the second heat exchange power between the motor cooling liquid and the heat transfer medium through the initial temperature, the medium type of the heat transfer medium and the flow rate. The heat exchange between the coolant and the heat transfer medium is achieved by the heat exchanger assembly, and the heat exchange characteristics of the heat exchanger assembly are fixed, so that the second heat exchange power (i.e., the heat absorption power described above) of the heat transfer medium can be estimated from the initial temperature, the medium type (134 a refrigerant type) of the heat transfer medium, and the flow rate. In practical application, for one vehicle type, the flow rate of the motor coolant and the medium type of the heat transfer medium are generally fixed, so the estimated second heat exchange power use map formula may be set as follows: y is 2 ＝0.0009x 2 2 +0.0209x 2 +0.9879, where y 2 For the second heat exchange power x 2 The initial temperature of the cooling liquid before heat exchange with the heat exchange medium is obtained by simulation or actual test.
After the second heat exchange power is obtained, the second heat exchange power can be directly used as second heat supply benefits according to different heating modes of the passenger cabin, and the second heat supply benefits can be obtained after the second heat exchange power is converted according to a conversion formula. For example, in the case where the heat transfer medium is a working medium of an in-vehicle air conditioner, if the temperature of the heat transfer medium is raised, the energy consumption of the air conditioner compressor can be reduced accordingly. And because the model of the compressor is fixed, the conversion formula for converting the second heat exchange power into the energy consumption reduction of the compressor can be obtained through simulation or test fitting.
In a possible embodiment, the step of selecting, as the heating target, the party with the higher heating gain from the battery and the passenger compartment includes:
step S210, taking the battery as the heat supply target in the case that the first heat supply benefit is greater than or equal to the second heat supply benefit;
and step S220, taking the passenger cabin as the heat supply target under the condition that the first heat supply benefit is smaller than the second heat supply benefit.
For example, if the calculated first heating benefit is greater than or equal to the second heating benefit, the battery is used as the heating target. Note that when the first heating benefit is equal to the second heating benefit, the battery may be preferentially targeted for heating such that the battery operates under relatively appropriate conditions, guaranteeing the performance of the battery. Otherwise, if the first heat supply benefit is smaller than the second heat supply benefit, the passenger cabin is taken as a heat supply target.
Referring to fig. 3, a second embodiment of the present application is presented based on a first embodiment of the vehicle waste heat supply method of the present application. In this embodiment, the same or similar parts as those of the above embodiment may be referred to the above, and will not be described here again. The waste heat supply pipeline of the vehicle comprises a waste heat recovery loop, a battery heating loop, a public heating loop and a passenger cabin heating loop, wherein flowing media are exchanged between the waste heat recovery loop and the public heating loop through a four-way valve, media are exchanged between the battery heating loop and the public heating loop through a three-way valve, and the public heating loop exchanges heat with the passenger cabin heating loop through a heat exchanger assembly. For example, referring to fig. 4, a schematic diagram of a first scenario of a waste heat supply pipeline in the waste heat supply method of a vehicle in the application is shown, where the waste heat supply pipeline of the vehicle includes a waste heat recovery loop, a battery heating loop, a public heating loop and a passenger cabin heating loop, where the waste heat recovery loop is connected with the public heating loop through a four-way valve, is connected with the battery heating loop through a three-way valve, and the waste heat heating loop exchanges heat with a heat exchange medium in the passenger cabin heating loop by changing its assembly.
The step of supplying heat by waste heat to the heat supply target comprises the following steps:
and step S310, performing waste heat heating on the heating target by adjusting the on state of the four-way valve and the on state of the three-way valve.
In the case of determining that the heating target is a battery, the flow medium in the waste heat recovery loop is preferentially flowed into the battery heating loop by adjusting the connection state of the four-way valve and the connection state of the three-way valve. And under the condition that the heat supply target is a passenger cabin, the flowing medium in the waste heat recovery loop only passes through the heat exchanger assembly and does not enter the battery heat supply loop by adjusting the state of the four-way valve and the connection state of the three-way valve. It should be noted that, a technician may set the state of the four-way valve and a specific control mode of the three-way valve according to the positions of the four-way valve and the three-way valve and the mechanism of pipeline communication in the four-way valve and the three-way valve.
In a possible implementation manner, referring to fig. 5, a second schematic view of a waste heat heating pipeline in the waste heat heating of a vehicle in this application is shown, the four-way valve includes a first interface 1, a second interface 2, a third interface 3 and a fourth interface 4, the three-way valve includes a fifth interface 5, a sixth interface 6 and a seventh interface 7, the first interface 1 and the second interface 2 belong to the waste heat recovery loop, the third interface 3, the fourth interface 4 and the fifth interface 5 belong to the public heating loop, the sixth interface 6 belongs to the battery heating loop, the seventh interface 7 is a common interface of the battery heating loop and the public heating loop, the interfaces closest to two ends of the heat exchanger assembly are the fourth interface 4 and the seventh interface 7 respectively, and under the condition that the waste heat recovery loop is closed, the cooling liquid after absorbing the waste heat in the waste heat recovery loop flows from the first interface 1 to the second interface 2. When the waste heat recovery loop is closed, that is, when the first port 1 and the second port 2 are in communication, the flow medium flows in the waste heat recovery loop in the flow direction from the first port 1 to the second port 2. In addition, the waste heat recovery loop may further include a water pump, an electric driving system, a water kettle, etc., and the public heat supply loop may also include a water pump and a water kettle, the battery heating loop may further include a battery system, and the passenger cabin heating loop may further include an electronic valve.
The step of performing waste heat heating on the heating target by adjusting states of the four-way valve and the three-way valve comprises the following steps:
step S311, when the heating target is a battery, controlling the first interface to be conducted with the third interface, controlling the fifth interface to be conducted with the sixth interface, and controlling the fourth interface to be conducted with the second interface, so that the cooling liquid after absorbing the waste heat flows into the battery heating loop preferentially;
step S312, when the heat supply target is the passenger cabin, controlling the first interface to be conducted with the third interface, controlling the fifth interface to be conducted with the seventh interface, and controlling the fourth interface to be conducted with the second interface, so that the cooling liquid after absorbing the waste heat flows through the heat exchanger assembly preferentially.
For example, in the case that the heat supply target is a battery, the first interface 1 and the third interface 3 are controlled to be turned on, the fifth interface 5 is controlled to be turned on with the sixth interface 6, the fourth interface 4 is controlled to be turned on with the second interface 2, and at this time, the flowing medium flow path in the waste heat recovery loop is as follows: starting from the first interface 1, the heat exchanger assembly, the fourth interface 4 and the second interface 2 sequentially pass through the third interface 3, the fifth interface 5, the sixth interface 6 and the heat exchanger assembly, and then return to the first interface 1. That is, the flowing medium flowing out of the waste heat recovery loop firstly enters the battery heating loop and then passes through the heat exchanger assembly, in practical application, the flowing medium flowing out of the battery heating loop can exchange heat with the passenger cabin heating loop through the heat exchanger assembly, and the electronic valve in the passenger cabin heating loop can be closed, so that the flow of the heat exchange medium in the passenger cabin heating loop is stopped, and the heat supply to the passenger cabin heating loop is also stopped (because the electronic valve is closed, the heat exchange medium in the passenger cabin heating loop stops flowing, and even if the flowing medium flowing out of the battery heating loop flows through the heat exchanger assembly, the flowing medium still does not supply heat to the passenger cabin heating loop).
Under the condition that the heat supply target is a passenger cabin, the first interface 1 is controlled to be conducted with the third interface 3, the fifth interface 5 is controlled to be conducted with the seventh interface 7, the fourth interface 4 is controlled to be conducted with the second interface 2, and at the moment, the flowing medium flowing path in the waste heat recovery loop is as follows: starting from the first interface 1, the heat exchanger assembly, the fourth interface 4 and the second interface 2 sequentially pass through the third interface 3, the fifth interface 5, the seventh interface 7 and the heat exchanger assembly, and then return to the first interface 1. That is, the flowing medium in the waste heat recovery loop only flows through the heat exchanger assembly and only supplies heat to the passenger cabin heating loop.
In addition, referring to fig. 6, an embodiment of the present application further proposes a vehicle waste heat supply device 100, the vehicle waste heat supply device 100 includes:
the determining module 10 is used for determining the heat supply benefits of respectively performing waste heat supply on the battery and the passenger cabin of the vehicle based on the current working state of the vehicle;
a selecting module 20, configured to select a party with high heat supply benefit from the battery and the passenger cabin as a heat supply target;
and the heat supply module 30 is used for supplying heat to the heat supply target by waste heat.
Optionally, the operating states include a first operating state of an electric motor in the vehicle and a second operating state of the battery, and the heating benefit includes a first heating benefit of the battery and a second heating benefit of the passenger compartment;
The determining module 10 is further configured to:
calculating a heating power of a motor in the vehicle based on the motor efficiency and the motor power in the first operating state;
calculating the first heat exchange power of the motor and the motor cooling liquid according to the heating power and the first heat exchange coefficient between the motor and the motor cooling liquid;
determining the first heating benefit based on the first heat exchange power, a second heat exchange coefficient when heating the battery, and the second operating state;
and determining the second heating benefit based on the motor coolant operating parameter and the heat transfer medium of the passenger compartment.
Optionally, the determining module 10 is further configured to:
calculating a first amount of battery charge decay for the battery based on a first battery temperature and a battery charge in the second operating state;
determining a second battery temperature of the battery after waste heat heating based on the first battery temperature, the self-heating power of the battery, the first heat exchange power and the second heat exchange coefficient;
calculating a second electric quantity attenuation amount of the battery after waste heat heating based on the second battery temperature and the battery electric quantity;
And determining the first heating benefit based on a difference between the second electric quantity attenuation and the first electric quantity attenuation.
Optionally, the working parameters of the motor coolant include an initial temperature of the motor coolant before heat exchange with the heat transfer medium and a flow rate of the motor coolant;
the determining module 10 is further configured to:
calculating a second heat exchange power between the motor coolant and the heat transfer medium based on the initial temperature, the medium type of the heat transfer medium, and the flow rate;
and determining the second heating benefit based on the second heat exchange power.
Optionally, the selecting module 20:
taking the battery as the heat supply target under the condition that the first heat supply benefit is greater than or equal to the second heat supply benefit;
and taking the passenger cabin as the heat supply target under the condition that the first heat supply benefit is smaller than the second heat supply benefit.
Optionally, the waste heat supply pipeline of the vehicle comprises a waste heat recovery loop, a battery heating loop, a public heating loop and a passenger cabin heating loop, wherein a flowing medium is exchanged between the waste heat recovery loop and the public heating loop through a four-way valve, a medium is exchanged between the battery heating loop and the public heating loop through a three-way valve, and the public heating loop exchanges heat with the passenger cabin heating loop through a heat exchanger assembly;
The heating module 30 is also configured to:
and waste heat heating is performed on the heating target by adjusting the on state of the four-way valve and the on state of the three-way valve.
Optionally, the four-way valve includes a first interface, a second interface, a third interface and a fourth interface, the three-way valve includes a fifth interface, a sixth interface and a seventh interface, the first interface and the second interface belong to the waste heat recovery loop, the third interface, the fourth interface and the fifth interface belong to the public heat supply loop, the sixth interface belongs to the battery heat supply loop, the seventh interface is a common interface of the battery heat supply loop and the public heat supply loop, the interfaces closest to two ends of the heat exchanger assembly are the fourth interface and the seventh interface respectively, and when the waste heat recovery loop is closed, the cooling liquid after absorbing waste heat in the waste heat recovery loop flows from the first interface to the second interface;
the heating module 30 is also configured to:
when the heat supply target is a battery, the first interface is controlled to be conducted with the third interface, the fifth interface is controlled to be conducted with the sixth interface, and the fourth interface is controlled to be conducted with the second interface, so that the cooling liquid after absorbing the waste heat flows into the battery heat supply loop preferentially;
And under the condition that the heat supply target is a passenger cabin, controlling the first interface to be communicated with the third interface, controlling the fifth interface to be communicated with the seventh interface, and controlling the fourth interface to be communicated with the second interface so as to enable the cooling liquid after absorbing the waste heat to flow through the heat exchanger assembly preferentially.
The application provides a vehicle waste heat heating device adopts the vehicle waste heat heating device method among the above-mentioned embodiment, aims at solving current vehicle motor waste heat utilization efficiency lower, the limited technical problem of electric automobile saving electric quantity. Compared with the prior art, the electronic device provided in the embodiment of the present application has the same beneficial effects as the vehicle waste heat supply method provided in the first embodiment, and other technical features in the vehicle waste heat supply device are the same as the features disclosed in the method in the first embodiment, which are not described in detail herein.
In addition, this application embodiment still provides a vehicle waste heat supply equipment, vehicle waste heat supply equipment includes: the system comprises a memory, a processor and a vehicle waste heat heating program which is stored in the memory and can run on the processor, wherein the vehicle waste heat heating program realizes the steps of the vehicle waste heat heating method when being executed by the processor.
The specific implementation manner of the vehicle waste heat supply device is basically the same as the above embodiments of the vehicle waste heat supply method, and will not be repeated here.
In addition, the embodiment of the application also provides a readable storage medium, wherein the readable storage medium stores a vehicle waste heat supply program, and the vehicle waste heat supply program realizes the steps of the vehicle waste heat supply method when being executed by a processor.
The specific implementation manner of the medium is basically the same as that of each embodiment of the vehicle waste heat supply method, and is not repeated here.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, including several instructions for causing a terminal device (which may be a vehicle, a computer, a server, or a network device, etc.) to perform the method described in the embodiments of the present application.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.
Claims (10)
1. The vehicle waste heat supply method is characterized by comprising the following steps of:
determining heat supply benefits of respectively performing waste heat supply on a battery and a passenger cabin of the vehicle based on the current working state of the vehicle;
selecting a party with high heat supply benefit from the battery and the passenger cabin as a heat supply target;
and waste heat is supplied to the heat supply target.
2. The vehicle waste heat heating method of claim 1, wherein the operating conditions include a first operating condition of an electric motor in the vehicle and a second operating condition of the battery, the heating benefits including a first heating benefit of the battery and a second heating benefit of the passenger compartment;
the step of determining the heating benefits of respectively performing waste heat heating on the battery and the passenger cabin of the vehicle based on the current working state of the vehicle comprises the following steps:
calculating a heating power of a motor in the vehicle based on the motor efficiency and the motor power in the first operating state;
calculating the first heat exchange power of the motor and the motor cooling liquid according to the heating power and the first heat exchange coefficient between the motor and the motor cooling liquid;
Determining the first heating benefit based on the first heat exchange power, a second heat exchange coefficient when heating the battery, and the second operating state;
and determining the second heating benefit based on the motor coolant operating parameter and the heat transfer medium of the passenger compartment.
3. The vehicle waste heat heating method of claim 2, wherein the step of determining the first heating benefit based on the first heat exchange power, a second heat exchange coefficient when heating the battery, and the second operating state comprises:
calculating a first amount of battery charge decay for the battery based on a first battery temperature and a battery charge in the second operating state;
determining a second battery temperature of the battery after waste heat heating based on the first battery temperature, the self-heating power of the battery, the first heat exchange power and the second heat exchange coefficient;
calculating a second electric quantity attenuation amount of the battery after waste heat heating based on the second battery temperature and the battery electric quantity;
and determining the first heating benefit based on a difference between the second electric quantity attenuation and the first electric quantity attenuation.
4. The vehicle waste heat heating method of claim 2, wherein the motor coolant operating parameters include an initial temperature of the motor coolant before heat exchange with the heat transfer medium and a flow rate of the motor coolant;
the step of determining the second heating benefit based on the motor coolant operating parameter and the passenger compartment heat transfer medium comprises:
calculating a second heat exchange power between the motor coolant and the heat transfer medium based on the initial temperature, the medium type of the heat transfer medium, and the flow rate;
and determining the second heating benefit based on the second heat exchange power.
5. The vehicle waste heat supply method according to claim 2, wherein the step of selecting a party with a high heat supply gain from the battery and the passenger compartment as a heat supply target includes:
taking the battery as the heat supply target under the condition that the first heat supply benefit is greater than or equal to the second heat supply benefit;
and taking the passenger cabin as the heat supply target under the condition that the first heat supply benefit is smaller than the second heat supply benefit.
6. The vehicle waste heat heating method of claim 1, wherein the waste heat heating circuit of the vehicle comprises a waste heat recovery loop, a battery heating loop, a public heating loop and a passenger cabin heating loop, wherein a flow medium is exchanged between the waste heat recovery loop and the public heating loop through a four-way valve, a medium is exchanged between the battery heating loop and the public heating loop through a three-way valve, and the public heating loop exchanges heat with the passenger cabin heating loop through a heat exchanger assembly;
The step of supplying heat by waste heat to the heat supply target comprises the following steps:
and waste heat heating is performed on the heating target by adjusting the on state of the four-way valve and the on state of the three-way valve.
7. The vehicle waste heat supply method according to claim 6, wherein the four-way valve includes a first interface, a second interface, a third interface and a fourth interface, the three-way valve includes a fifth interface, a sixth interface and a seventh interface, the first interface and the second interface belong to the waste heat recovery loop, the third interface, the fourth interface and the fifth interface belong to the common heat supply loop, the sixth interface belongs to the battery heat supply loop, the seventh interface is a common interface of the battery heat supply loop and the common heat supply loop, the interfaces closest to both ends of the heat exchanger assembly are the fourth interface and the seventh interface, respectively, and in the case that the waste heat recovery loop is closed, the cooling liquid after absorbing waste heat in the waste heat recovery loop flows from the first interface to the second interface;
the step of performing waste heat heating on the heating target by adjusting states of the four-way valve and the three-way valve comprises the following steps:
When the heat supply target is a battery, the first interface is controlled to be conducted with the third interface, the fifth interface is controlled to be conducted with the sixth interface, and the fourth interface is controlled to be conducted with the second interface, so that the cooling liquid after absorbing the waste heat flows into the battery heat supply loop preferentially;
and under the condition that the heat supply target is a passenger cabin, controlling the first interface to be communicated with the third interface, controlling the fifth interface to be communicated with the seventh interface, and controlling the fourth interface to be communicated with the second interface so as to enable the cooling liquid after absorbing the waste heat to flow through the heat exchanger assembly preferentially.
8. The utility model provides a vehicle waste heat heating device which characterized in that, vehicle waste heat heating device includes:
the determining module is used for determining the heat supply benefits of respectively carrying out waste heat supply on the battery and the passenger cabin of the vehicle based on the current working state of the vehicle;
the selecting module is used for selecting a party with high heat supply benefit from the battery and the passenger cabin as a heat supply target;
and the heat supply module is used for supplying heat to the heat supply target by waste heat.
9. A vehicle waste heat supply apparatus, characterized in that the vehicle waste heat supply apparatus comprises: a memory, a processor and a vehicle waste heat supply program stored on the memory and operable on the processor, which when executed by the processor, implements the steps of the vehicle waste heat supply method of any one of claims 1 to 7.
10. A readable storage medium, characterized in that the readable storage medium is a computer readable storage medium, on which a vehicle waste heat supply program is stored, which when executed by a processor implements the steps of the vehicle waste heat supply method according to any one of claims 1 to 7.
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| CN202410075282.5A CN117885499A (en) | 2024-01-17 | 2024-01-17 | Vehicle waste heat heating method, device, equipment and readable storage medium |
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