CN117922242A - Electric commercial vehicle heating system and control method - Google Patents
Electric commercial vehicle heating system and control method Download PDFInfo
- Publication number
- CN117922242A CN117922242A CN202410287826.4A CN202410287826A CN117922242A CN 117922242 A CN117922242 A CN 117922242A CN 202410287826 A CN202410287826 A CN 202410287826A CN 117922242 A CN117922242 A CN 117922242A
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- heating
- heating system
- way valve
- commercial vehicle
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 260
- 238000000034 method Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000000446 fuel Substances 0.000 claims abstract description 44
- 239000000295 fuel oil Substances 0.000 claims abstract description 40
- 238000001816 cooling Methods 0.000 claims abstract description 31
- 238000004378 air conditioning Methods 0.000 claims description 37
- 239000003921 oil Substances 0.000 claims description 15
- 239000008236 heating water Substances 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000001360 synchronised effect Effects 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
- B60H1/00357—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
- B60H1/004—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for vehicles having a combustion engine and electric drive means, e.g. hybrid electric vehicles
-
- 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
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/03—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant and from a source other than the propulsion plant
-
- 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
- B60H1/14—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit
- B60H1/143—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
-
- 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
- B60H2001/00307—Component temperature regulation using a liquid flow
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention provides a heating system and a control method of an electric commercial vehicle, wherein the heating system comprises a warm air water heating system, a fuel oil heating system, a battery cooling circulation system, a four-way valve and a controller; the output end of the warm air water heating system is connected with the input end of the fuel oil heating system, the output end of the fuel oil heating system is connected with the first interface of the four-way valve, the second interface of the four-way valve is connected with the input end of the battery cooling circulation system, the third interface is connected with the output end of the battery cooling circulation system, and the fourth interface is connected with the input end of the warm air water heating system; the signal output end of the controller is connected with the signal input end of the four-way valve, the working mode of the four-way valve is controlled through the output signal of the controller, the circulation loop of the electric commercial vehicle heating system is changed, the heating modes under different heating demands are switched by using one set of fuel heating system, the problems that the battery cannot discharge at low temperature and the air conditioner is used for heating are solved, the heating cost is reduced, and the heating power consumption is reduced.
Description
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a heating system and a control method of an electric commercial vehicle.
Background
When an electric commercial vehicle is limited by the performance of a battery core, the problem that the electric commercial vehicle cannot discharge in a low-temperature environment exists. When the temperature of the power battery is lower than-30 ℃, the power battery cannot realize discharging, and at the moment, the battery heating requirement exists, and if the power battery heating film heating system and the air conditioner warm air heating system cannot work, the safety risks such as no warm air, vehicles sit and the like still exist. However, the common warm air and power battery heating system has higher power consumption when working for a long time in winter, and influences the winter endurance mileage of the electric vehicle.
The prior art discloses an integrated thermal management system of a hybrid electric vehicle, which comprises a motor loop, a battery loop and a four-way valve, wherein the motor loop and the battery loop are connected in parallel through the four-way valve; the motor loop comprises a first expansion kettle, a first water pump, a charger and a motor which are sequentially connected in series through a cooling liquid pipeline, wherein the outlet end of the motor is connected with the first inlet end of the four-way valve, and the first outlet end of the four-way valve is connected with the inlet end of the first expansion kettle; the battery loop includes the second expansion kettle that loops through coolant liquid pipeline series connection in proper order, the first water pump of second and group battery, the second entrance point of cross valve is connected to the exit end of group battery, the second exit end of cross valve is connected the inlet end of second expansion kettle, can realize utilizing the heat that the motor produced to heat passenger cabin when the motor generates heat, but in this scheme, though realized the recycle of heat, nevertheless can't realize sharing a set of heater system and realize passenger cabin and battery's synchronous heating, lead to the cost higher.
Disclosure of Invention
In order to solve the problem of higher cost of the current fuel heating system of the electric commercial vehicle, the invention provides the electric commercial vehicle heating system and the control method, and the four-way valve is controlled to enter different working modes according to the actual requirements of battery heating and air-conditioning heating, and a set of fuel heating system is utilized to process air-conditioning heating and power battery heating requests.
In order to achieve the technical effects, the technical scheme of the invention is as follows:
an electric commercial vehicle heating system, a warm air water heating system, a fuel oil heating system, a battery cooling circulation system, a four-way valve and a controller;
The output end of the warm air water heating system is connected with the input end of the fuel oil heating system, the output end of the fuel oil heating system is connected with the first interface of the four-way valve, the second interface of the four-way valve is connected with the input end of the battery cooling circulation system, the third interface is connected with the output end of the battery cooling circulation system, and the fourth interface is connected with the input end of the warm air water heating system; and the signal output end of the controller is connected with the signal input end of the four-way valve.
According to the technical scheme, the controller is utilized to switch the communication relation of the four-way valve, the switching of the circulation loop is realized according to different heating requirements, and the same fuel heating system is utilized to meet the battery heating requirements and the air-conditioning heating requirements.
Preferably, the fuel heating system comprises a fuel heater, a fuel heating oil tank, an oil pump, an oil way system, a heating controller and a water temperature sensor;
The fuel heating oil tank supplies fuel to the fuel heater through an oil way system; the signal output end of the water temperature sensor is connected with the signal input end of the heating controller and is used for acquiring the internal water temperature of the fuel oil heater during working; when the internal water temperature reaches a preset limit maximum working temperature T0 during working, the heating controller controls the fuel oil heater to stop burning and heating; when the internal water temperature is reduced to a preset limit working temperature T1, the heating controller controls the fuel oil heater to restart combustion heating.
The fuel heater can partially or completely adopt traditional fuel as energy to assist heating and battery heating, so that heating power consumption is reduced or avoided, and vehicle endurance mileage attenuation is avoided.
Preferably, the warm air water heating system comprises an air conditioner warm air core, a first expansion kettle, an air conditioner heating water pump and a PTC heater, wherein the air conditioner warm air core, the air conditioner heating water pump and the PTC heater are connected in series, the first expansion kettle is connected with the air conditioner heating water pump in parallel, the air conditioner warm air core is connected with a fourth interface of the four-way valve, and the PTC heater is connected with the fuel heating system.
Preferably, the battery cooling circulation system comprises a power battery, a second expansion kettle and a battery water cooling unit which are connected in series, wherein the power battery is connected with the second interface of the four-way valve, and the battery water cooling unit is connected with the third interface of the four-way valve.
The technical scheme also provides a control method based on the electric commercial vehicle heating system, which comprises the following steps: the four-way valve is controlled by the controller to switch working modes, wherein the working modes comprise a first working mode and a second working mode;
When the controller controls the first interface and the second interface of the four-way valve to be communicated, the third interface and the fourth interface are communicated, and the electric commercial vehicle heating system is in a first working mode, the warm air water heating system, the fuel oil heating system, the four-way valve and the battery cooling circulation system form a circulation loop;
when the controller controls the first interface and the fourth interface of the four-way valve to be communicated and the electric commercial vehicle heating system is in the second working mode, the warm air water heating system, the fuel oil heating system and the four-way valve form a circulation loop.
Preferably, the heating method further comprises: judging whether a power battery heating request and an air conditioner heating request exist in the vehicle or not;
If the vehicle has a power battery heating request but does not have an air conditioner heating request, the controller outputs a control signal to enable the four-way valve to enter a first working mode, and the electric commercial vehicle heating system heats the power battery; when the lowest temperature of the battery is heated to be greater than a preset temperature T3 or in a fault mode, the warm air water heating system and the fuel oil heating system are out of operation;
if the vehicle has a power battery heating request and an air conditioner heating request, the controller outputs a control signal to enable the four-way valve to enter a first working mode, and the electric commercial vehicle heating system simultaneously performs power battery heating and air conditioner heating; after the lowest temperature of the battery is heated to be greater than the preset temperature T4, the controller outputs a control signal to enable the four-way valve to enter a second working mode, and the electric commercial vehicle heating system stops heating the power battery and continues air conditioning heating;
If the vehicle does not have a power battery heating request but has an air conditioner heating request, the controller outputs a control signal to enable the four-way valve to enter a second working mode, and the electric commercial vehicle heating system independently performs air conditioner heating, so that continuous heating of the battery is avoided.
Preferably, when the four-way valve is in the first operation mode, the PTC heater and the fuel heater operate simultaneously to achieve power battery heating and air conditioning heating.
Preferably, if the vehicle is in a charging state, when the four-way valve is in the second working mode, the electric commercial vehicle heating system preferably provides warm air through the PTC heater to realize air conditioning heating, and if the PTC heater cannot work, the fuel oil heater and the heating system of the power battery work simultaneously to realize air conditioning heating.
The PTC heater and the fuel heater are used to assist in heating the power battery, thereby shortening the heating time and the charging time.
Preferably, if the vehicle is in a driving or idling state, when the four-way valve is in the second working mode, the electric commercial vehicle heating system preferably supplies warm air to perform air conditioning and heating through the fuel heater, and if the fuel heater cannot work, the PTC heater and the heating system with the power battery work simultaneously to achieve air conditioning and heating.
The fuel oil heater is preferably used for battery heating and air-conditioning heating, so that the power consumption is reduced, and the running mileage of the vehicle in winter is ensured.
Preferably, the heating controller is provided with temperature thresholds K1, K2, K3 and K4; when the four-way valve is in a first working mode, t0=k1, t1=k2; when the four-way valve is in the second working mode, t0=k3, t1=k4; wherein K1 is less than K3, K2 is less than K4, so as to distinguish the water temperature required by warm air from the water temperature required by battery heating.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
(1) The invention provides a heating system and a control method of an electric commercial vehicle, wherein the heating system comprises a warm air water heating system, a fuel oil heating system, a battery cooling circulation system, a four-way valve and a controller; the output end of the warm air water heating system is connected with the input end of the fuel oil heating system, the output end of the fuel oil heating system is connected with the first interface of the four-way valve, the second interface of the four-way valve is connected with the input end of the battery cooling circulation system, the third interface is connected with the output end of the battery cooling circulation system, and the fourth interface is connected with the input end of the warm air water heating system; the signal output end of the controller is connected with the signal input end of the four-way valve, the switching of the circulation loop is realized according to different heating requirements by switching the communication relation of the four-way valve, and the same fuel heating system is used for meeting the battery heating requirements and the air-conditioning heating requirements;
(2) According to the heating control method for the electric commercial vehicle, the working mode of the four-way valve is controlled through the output signal of the controller, the circulation loop of the heating system of the electric commercial vehicle is changed, the heating mode switching under different heating requirements is met by using one set of fuel heating system, the problems that the battery cannot discharge at low temperature and the air conditioner is used for heating are solved, the heating cost is reduced, and the heating power consumption is reduced.
Drawings
FIG. 1 is a schematic diagram of a heating system of an electric commercial vehicle according to an embodiment of the present invention;
fig. 2 is a schematic overall flow chart of a heating control method for an electric commercial vehicle according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a first operation mode in an embodiment of the invention;
FIG. 4 is a flow chart illustrating a second mode of operation during a vehicle state of charge in accordance with an embodiment of the present invention;
FIG. 5 is a schematic flow chart of a second operation mode in a driving or idling state of a vehicle according to an embodiment of the present invention;
In the figure: 1. a warm air water heating system; 11. a warm air core of the air conditioner; 12. a first expansion kettle; 13. an air conditioner heating water pump; 14. a PTC heater; 2. a fuel oil heating system; 21. a fuel oil heater; 22. a fuel heating tank; 23. an oil pump; 3. a battery cooling circulation system; 31. a power battery; 32. a second expansion kettle; 33. a water cooling unit; 4. a four-way valve; 5. and a controller.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
for better illustration of the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent actual dimensions;
It will be appreciated by those skilled in the art that some well known descriptions in the figures may be omitted.
The technical scheme of the invention is further described below with reference to the accompanying drawings and examples.
The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent;
Example 1
As shown in fig. 1, the present embodiment proposes a heating system for an electric commercial vehicle, including: a warm air water heating system 1, a fuel oil heating system 2, a battery cooling circulation system 3, a four-way valve 4 and a controller 5; the output end of the warm air water heating system 1 is connected with the input end of the fuel oil heating system 2, the output end of the fuel oil heating system 2 is connected with a first interface of the four-way valve 4, a second interface of the four-way valve 4 is connected with the input end of the battery cooling circulation system 3, a third interface is connected with the output end of the battery cooling circulation system 3, and a fourth interface is connected with the input end of the warm air water heating system 1; the signal output end of the controller 5 is connected with the signal input end of the four-way valve 4.
Specifically, the fuel heating system 2 comprises a fuel heater 21, a fuel heating oil tank 22, an oil pump 23, an oil circuit system, a heating controller and a water temperature sensor;
The fuel heating tank 22 supplies fuel to the fuel heater 21 through an oil passage system by an oil pump 23; the signal output end of the water temperature sensor is connected with the signal input end of the heating controller and is used for acquiring the internal water temperature of the fuel oil heater 21 during working; when the internal water temperature during operation reaches a preset limit maximum operation temperature T0, the heating controller controls the fuel heater 21 to stop combustion heating; when the internal water temperature falls to the preset limit operating temperature T1, the heating controller controls the fuel heater 21 to restart combustion heating.
In a specific implementation process, the controller 5 controls the four-way valve 4 to switch working modes, wherein the working modes comprise a first working mode and a second working mode; the heating controller is also provided with temperature thresholds K1, K2, K3 and K4; when the four-way valve 4 is in the first operation mode, t0=k1, t1=k2; when the four-way valve 4 is in the second working mode, t0=k3, t1=k4; wherein K1 is less than K3, and K2 is less than K4.
In this embodiment, the warm air water heating system 1 includes an air-conditioning warm air core 11, a first expansion kettle 12, an air-conditioning heating water pump 13 and a PTC heater 14, the air-conditioning warm air core 11, the air-conditioning heating water pump 13 and the PTC heater 14 are connected in series, the first expansion kettle 12 is connected in parallel with the air-conditioning heating water pump 13, the air-conditioning warm air core 11 is connected with a fourth interface of the four-way valve 4, and the PTC heater 14 is connected with the fuel heating system 2.
The battery cooling circulation system 3 comprises a power battery 31, a second expansion kettle 32 and a battery water cooling unit 33 which are connected in series, wherein the water cooling unit 33 comprises a cooling source, a water pump and other components; the power battery is connected with the second interface of the four-way valve 4, and the battery water cooling unit 33 is connected with the third interface of the four-way valve 4.
Example 2
In this embodiment, based on embodiment 1, a control method based on the above-mentioned electric commercial vehicle heating system is provided, including: the four-way valve 4 is controlled by the controller 5 to switch the working modes, wherein the working modes comprise a first working mode and a second working mode;
When the controller 5 controls the first interface and the second interface of the four-way valve 4 to be communicated, the third interface and the fourth interface to be communicated, and the electric commercial vehicle heating system is in a first working mode, the warm air water heating system 1, the fuel oil heating system 2, the four-way valve 4 and the battery cooling circulation system 3 form a circulation loop;
When the controller 5 controls the first interface and the fourth interface of the four-way valve 4 to be communicated and the electric commercial vehicle heating system is in the second working mode, the warm air water heating system 1, the fuel oil heating system 2 and the four-way valve 4 form a circulation loop.
Example 3
In this embodiment, based on embodiment 2, a method for controlling heating of an electric commercial vehicle in a vehicle charging state is proposed, as shown in fig. 2, specifically as follows:
judging whether a power battery heating request and an air conditioner heating request exist in the vehicle or not;
if there is a power battery heating request but there is no air conditioner heating request, the controller 5 outputs a control signal to make the four-way valve 4 enter a first operation mode, as shown in fig. 3, the fuel heater 21 and the PTC heater 14 operate simultaneously, and the electric commercial vehicle heating system heats the power battery 31; when the lowest temperature of the battery is higher than the preset temperature T3 or the fuel heater 21 and the PTC heater 14 are in a fault mode, the fuel heater and the PTC heater are out of operation;
If the vehicle has a power battery heating request and an air conditioner heating request, the controller 5 outputs a control signal to enable the four-way valve 4 to enter a first working mode, and the electric commercial vehicle heating system simultaneously performs power battery heating and air conditioner heating; when the lowest temperature of the battery is higher than the preset temperature T3, the controller 5 outputs a control signal to enable the four-way valve 4 to enter a second working mode, as shown in fig. 4, the electric commercial vehicle heating system stops heating the power battery 31 and continues to perform air conditioning and heating, at this time, the PTC heater 14 is preferentially used for providing warm air, the fuel oil heater 21 is used for replacing work when the PTC heater 14 cannot work, and meanwhile, the battery is continuously heated by adopting the self-contained heating system;
If the vehicle has no power battery heating request but has an air-conditioning heating request, the controller 5 outputs a control signal to enable the four-way valve 4 to enter a second working mode, as shown in fig. 4, the electric commercial vehicle heating system singly performs air-conditioning heating, at this time, the PTC heater 14 is preferentially used for providing warm air, the fuel heater 21 is used for replacing work when the PTC heater 14 cannot work, and meanwhile, the battery is continuously heated by adopting the self-contained heating system.
In this example, t3=17 ℃; in addition, a temperature threshold value T4= -20 ℃ is set, if the lowest temperature of the battery is larger than T4, the power battery heating request is judged to be absent, otherwise, the power battery heating request is judged to be present.
Example 4
In this embodiment, based on embodiment 2, a method for controlling heating of an electric commercial vehicle in a driving or idling state of the vehicle is also provided, which specifically includes the following steps:
judging whether a power battery heating request and an air conditioner heating request exist in the vehicle or not;
if the vehicle has a power battery heating request but does not have an air conditioner heating request, the controller 5 outputs a control signal to enable the four-way valve 4 to enter a first working mode, as shown in fig. 3, and the electric commercial vehicle heating system heats the power battery 31; when the lowest temperature of the battery is heated to be greater than a preset temperature T3 or in a fault mode, the warm air water heating system 1 and the fuel oil heating system 2 are out of operation;
If the vehicle has a power battery heating request and an air conditioner heating request, the controller 5 outputs a control signal to enable the four-way valve 4 to enter a first working mode, and the electric commercial vehicle heating system simultaneously performs power battery heating and air conditioner heating; when the lowest temperature of the battery is higher than the preset temperature T3, the controller 5 outputs a control signal to enable the four-way valve 4 to enter a second working mode, as shown in fig. 5, the electric commercial vehicle heating system stops heating the power battery 31 and continues to perform air conditioning and heating, at this time, the fuel oil heater 21 is preferentially used for providing warm air, the PTC heater 14 is used for replacing the operation when the fuel oil heater 21 cannot work, and meanwhile, the battery is continuously heated by adopting the self-contained heating system;
If the vehicle has no power battery heating request but has an air-conditioning heating request, the controller 5 outputs a control signal to enable the four-way valve 4 to enter a second working mode, as shown in fig. 5, the electric commercial vehicle heating system singly performs air-conditioning heating, at this time, the fuel oil heater 21 is preferentially used for providing warm air, the PTC heater 14 is used for replacing work when the fuel oil heater 21 cannot work, and meanwhile, the battery is continuously heated by adopting the self-contained heating system;
in this example, t3=17 ℃; in addition, a temperature threshold value T4= -20 ℃ is set, if the lowest temperature of the battery is larger than T4, the power battery heating request is judged to be absent, otherwise, the power battery heating request is judged to be present.
It is to be understood that the above examples of the present invention are provided by way of illustration only and are not intended to limit the scope of the invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. An electric utility vehicle heating system, comprising: the system comprises a warm air water heating system (1), a fuel oil heating system (2), a battery cooling circulation system (3), a four-way valve (4) and a controller (5);
The output end of the warm air water heating system (1) is connected with the input end of the fuel oil heating system (2), the output end of the fuel oil heating system (2) is connected with a first interface of the four-way valve (4), a second interface of the four-way valve (4) is connected with the input end of the battery cooling circulation system (3), a third interface is connected with the output end of the battery cooling circulation system (3), and a fourth interface is connected with the input end of the warm air water heating system (1); the signal output end of the controller (5) is connected with the signal input end of the four-way valve (4).
2. The electric commercial vehicle heating system according to claim 1, characterized in that the fuel heating system (2) comprises a fuel heater (21), a fuel heating tank (22), an oil pump (23), an oil circuit system, a heating controller and a water temperature sensor;
The fuel heating oil tank (22) supplies fuel to the fuel heater (21) through an oil path system; the signal output end of the water temperature sensor is connected with the signal input end of the heating controller and is used for acquiring the internal water temperature of the fuel oil heater (21) when in operation; when the internal water temperature reaches a preset limit maximum working temperature T0 during working, the heating controller controls the fuel oil heater (21) to stop combustion heating; when the internal water temperature is reduced to a preset limit operating temperature T1, the heating controller controls the fuel heater (21) to restart combustion heating.
3. The electric commercial vehicle heating system according to claim 2, wherein the warm air water heating system (1) comprises an air-conditioning warm air core (11), a first expansion kettle (12), an air-conditioning heating water pump (13) and a PTC heater (14), the air-conditioning warm air core (11), the air-conditioning heating water pump (13) and the PTC heater (14) are connected in series, the first expansion kettle (12) is connected in parallel with the air-conditioning heating water pump (13), the air-conditioning warm air core (11) is connected with a fourth interface of the four-way valve (4), and the PTC heater (14) is connected with the fuel heating system (2).
4. The electric commercial vehicle heating system according to claim 3, wherein the battery cooling circulation system (3) comprises a power battery (31), a second expansion kettle (32) and a battery water cooling unit (33) connected in series, the power battery (31) is connected with the second interface of the four-way valve (4), and the battery water cooling unit (33) is connected with the third interface of the four-way valve (4).
5. A control method based on the electric commercial vehicle heating system according to any one of claims 1 to 4, characterized in that the four-way valve (4) is controlled by the controller (5) to switch the operation modes, which include a first operation mode and a second operation mode;
When the controller (5) controls the first interface and the second interface of the four-way valve (4) to be communicated, the third interface and the fourth interface are communicated, and the electric commercial vehicle heating system is in a first working mode, the warm air water heating system (1), the fuel oil heating system (2), the four-way valve (4) and the battery cooling circulation system (3) form a circulation loop;
When the controller (5) controls the first interface and the fourth interface of the four-way valve (4) to be communicated and the electric commercial vehicle heating system is in the second working mode, the warm air water heating system (1), the fuel oil heating system (2) and the four-way valve (4) form a circulation loop.
6. The electric commercial vehicle heating control method according to claim 5, characterized by further comprising: judging whether a power battery heating request and an air conditioner heating request exist in the vehicle or not;
If the vehicle has a power battery heating request but does not have an air conditioner heating request, the controller (5) outputs a control signal to enable the four-way valve (4) to enter a first working mode, and the electric commercial vehicle heating system heats the power battery (31); when the lowest temperature of the battery is heated to be greater than a preset temperature T3 or in a fault mode, the warm air water heating system (1) and the fuel oil heating system (2) are out of operation;
if the vehicle has a power battery heating request and an air conditioner heating request, the controller (5) outputs a control signal to enable the four-way valve (4) to enter a first working mode, and the electric commercial vehicle heating system simultaneously performs power battery heating and air conditioner heating; when the lowest temperature of the battery is higher than the preset temperature T4, the controller (5) outputs a control signal to enable the four-way valve (4) to enter a second working mode, and the electric commercial vehicle heating system stops heating the power battery (31) and continues air-conditioning heating;
If the vehicle does not have a power battery heating request but has an air-conditioning heating request, the controller (5) outputs a control signal to enable the four-way valve (4) to enter a second working mode, and the electric commercial vehicle heating system singly performs air-conditioning heating.
7. The electric commercial vehicle heating control method according to claim 6, characterized in that the PTC heater (14) and the fuel heater (21) are operated simultaneously to achieve power battery heating and air-conditioning heating when the four-way valve (4) is in the first operation mode.
8. The heating control method for the electric commercial vehicle according to claim 6, wherein if the vehicle is in a charged state, when the four-way valve (4) is in the second operation mode, the electric commercial vehicle heating system preferably supplies warm air through the PTC heater (14) to achieve air-conditioning heating, and if the PTC heater (14) cannot operate, the fuel oil heater (21) and the heating system of the power battery (31) operate simultaneously to achieve air-conditioning heating.
9. The heating control method for the electric commercial vehicle according to claim 6, wherein if the vehicle is in a driving or idling state, when the four-way valve (4) is in the second operation mode, the electric commercial vehicle heating system preferably supplies warm air to perform air-conditioning heating through the fuel heater (21), and if the fuel heater (21) cannot operate, the PTC heater (14) and the heating system of the power battery (31) operate simultaneously to perform air-conditioning heating.
10. The heating control method for an electric commercial vehicle according to claim 5, wherein the heating controller is provided with temperature thresholds K1, K2, K3 and K4; when the four-way valve (4) is in a first working mode, t0=k1, t1=k2; when the four-way valve (4) is in a second working mode, t0=k3, t1=k4; wherein K1 is less than K3, and K2 is less than K4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410287826.4A CN117922242A (en) | 2024-03-13 | 2024-03-13 | Electric commercial vehicle heating system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410287826.4A CN117922242A (en) | 2024-03-13 | 2024-03-13 | Electric commercial vehicle heating system and control method |
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| CN117922242A true CN117922242A (en) | 2024-04-26 |
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| CN202410287826.4A Pending CN117922242A (en) | 2024-03-13 | 2024-03-13 | Electric commercial vehicle heating system and control method |
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| Country | Link |
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| CN (1) | CN117922242A (en) |
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