CN113500947B - Liquid supplementing method and device for pure electric commercial vehicle cooling liquid - Google Patents
Liquid supplementing method and device for pure electric commercial vehicle cooling liquid Download PDFInfo
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- CN113500947B CN113500947B CN202110738608.4A CN202110738608A CN113500947B CN 113500947 B CN113500947 B CN 113500947B CN 202110738608 A CN202110738608 A CN 202110738608A CN 113500947 B CN113500947 B CN 113500947B
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- 239000007788 liquid Substances 0.000 title claims abstract description 372
- 230000001502 supplementing effect Effects 0.000 title claims abstract description 189
- 238000000034 method Methods 0.000 title claims abstract description 48
- 239000000110 cooling liquid Substances 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 185
- 238000001802 infusion Methods 0.000 claims abstract description 146
- 239000012530 fluid Substances 0.000 claims abstract description 142
- 239000002826 coolant Substances 0.000 claims abstract description 22
- 230000003068 static effect Effects 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims description 83
- 230000007958 sleep Effects 0.000 claims description 26
- 239000012809 cooling fluid Substances 0.000 claims description 15
- 239000013589 supplement Substances 0.000 claims description 12
- 230000002618 waking effect Effects 0.000 claims description 2
- 238000007689 inspection Methods 0.000 abstract description 6
- 230000009194 climbing Effects 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 2
- 230000005059 dormancy Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The application relates to a liquid supplementing method and a liquid supplementing device for pure electric commercial vehicle coolant, wherein the method comprises the steps of automatically awakening a vehicle-mounted T-BOX (T-BOX) to a CAN (controller area network) of the whole vehicle within a set time period when the vehicle is in a static state; the vehicle controller detects a liquid level signal of the auxiliary water tank through an auxiliary water tank liquid level sensor and transmits the liquid level signal of the auxiliary water tank to the vehicle-mounted T-BOX through a vehicle CAN network; the vehicle-mounted T-BOX judges whether the liquid level signal of the auxiliary water tank is at the lowest liquid level or not, the vehicle-mounted T-BOX sends an automatic liquid supplementing request signal to a vehicle body controller, and the vehicle body controller controls the low-voltage main relay to be closed; the vehicle-mounted T-BOX sends an automatic liquid supplementing signal to the vehicle controller, the vehicle controller opens the liquid supplementing electromagnetic valve and the liquid supplementing pump, and the cooling liquid in the water supplementing tank is filled into the auxiliary water tank through the pipeline. This application can automated inspection expansion tank's liquid level height and automatic fluid infusion, and whole journey need not artificial control, has saved the high risk operation of artifical climbing filling.
Description
Technical Field
The application relates to the technical field of pure electric commercial vehicle automobile battery cooling, in particular to a liquid supplementing method and a liquid supplementing device for pure electric commercial vehicle cooling liquid.
Background
The new energy automobile has a wide development prospect, and the pure electric commercial vehicle is widely applied to the real vehicle. In order to meet the requirements of long endurance mileage and long service life, most of pure electric commercial vehicles adopt a back type liquid cooling power battery, and an auxiliary water tank in a battery cooling pipeline is usually located at the highest position and 3-4m away from the ground. The liquid level inspection and the liquid supplementing operation are very inconvenient.
During daily inspection, a user only observes the liquid level of the cooling liquid in a remote visual mode, and due to the fact that the position of the auxiliary water tank is high and the liquid level line is not clear, deviation is often observed. When the cooling liquid is insufficient, the cooling liquid needs to climb above numerous high-voltage accessories such as power batteries and the like by virtue of a ladder to supplement the cooling liquid, and the method belongs to high-risk operation. In particular, when a cooling pipeline is overhauled, a large amount of cooling liquid needs to be added, long-time high-level operation is needed, and great complaints are made by users.
Disclosure of Invention
The embodiment of the application provides a liquid supplementing method and a liquid supplementing device for pure electric commercial vehicle cooling liquid, and aims to solve the problem that liquid level detection and liquid supplementing operation of a pure electric commercial vehicle adopting a back type liquid cooling power battery in the related art are inconvenient.
The first aspect of the embodiment of the application provides a liquid supplementing method for pure electric commercial vehicle cooling liquid, and the method comprises the following steps of:
the vehicle-mounted T-BOX automatically awakens the whole vehicle CAN network within a set time period when the vehicle is in a static state;
the vehicle controller detects a liquid level signal of the auxiliary water tank through an auxiliary water tank liquid level sensor and transmits the liquid level signal of the auxiliary water tank to the vehicle-mounted T-BOX through a vehicle CAN network;
the vehicle-mounted T-BOX judges whether the liquid level signal of the auxiliary water tank is at the lowest liquid level, if so, the next step is carried out, and if not, the whole vehicle returns to the sleep mode;
the vehicle-mounted T-BOX sends an automatic liquid supplementing request signal to a vehicle body controller, and the vehicle body controller controls a low-voltage main relay to be closed so as to electrify a low-voltage system of the whole vehicle;
the vehicle-mounted T-BOX sends an automatic liquid supplementing signal to the vehicle controller, the vehicle controller opens a liquid supplementing electromagnetic valve and a liquid supplementing pump, and cooling liquid in a water supplementing tank is filled into the auxiliary water tank through a pipeline;
when the auxiliary water tank liquid level sensor detects that the liquid level signal of the auxiliary water tank reaches the maximum liquid level, the vehicle body controller controls the low-pressure main relay to be switched off, so that the low-pressure system of the whole vehicle is powered off, and the whole vehicle returns to the sleep mode after automatic liquid supplement.
In some embodiments: when the liquid level sensor of the water replenishing tank detects that the cooling liquid of the water replenishing tank is insufficient, the vehicle control unit controls the liquid replenishing pump to enter an idle running protection state within a few seconds and simultaneously sends a signal for requesting the vehicle-mounted T-BOX to quit the automatic liquid replenishing;
and the vehicle-mounted T-BOX sends an automatic fluid infusion failure signal to the vehicle control unit after receiving the quit automatic fluid infusion request signal, the vehicle control unit closes the fluid infusion electromagnetic valve and the fluid infusion pump after receiving the automatic fluid infusion failure signal, and an alarm signal indicating that the liquid level in the fluid infusion tank is insufficient is displayed on an automobile instrument.
In some embodiments: the auxiliary water tank comprises a motor cooling auxiliary water tank and a battery cooling auxiliary water tank, the liquid supplementing electromagnetic valve comprises a motor liquid supplementing electromagnetic valve and a battery liquid supplementing electromagnetic valve, the motor liquid supplementing electromagnetic valve is positioned on a pipeline between the motor cooling auxiliary water tank and a liquid supplementing pump, and the battery liquid supplementing electromagnetic valve is positioned on a pipeline between the battery cooling auxiliary water tank and the liquid supplementing pump;
and a first one-way valve is also arranged on a pipeline between the motor cooling auxiliary water tank and the liquid replenishing pump, and a second one-way valve is also arranged on a pipeline between the battery cooling auxiliary water tank and the liquid replenishing pump.
In some embodiments: when the liquid level of the motor cooling auxiliary water tank is lower than the lowest liquid level and the motor liquid supplementing electromagnetic valve and the liquid supplementing pump are normal, the vehicle body controller controls the low-voltage main relay to be closed; the vehicle control unit opens the motor fluid infusion electromagnetic valve and the fluid infusion pump, and fills the cooling fluid in the fluid infusion tank into the motor cooling auxiliary water tank through the pipeline;
when the liquid level of the battery cooling auxiliary water tank is lower than the lowest liquid level and the battery fluid infusion electromagnetic valve and the fluid infusion pump are normal, the vehicle body controller controls the low-voltage main relay to be closed; the vehicle control unit opens the battery fluid infusion electromagnetic valve and the fluid infusion pump, and fills the cooling fluid in the fluid infusion tank into the battery cooling auxiliary water tank through the pipeline;
when the liquid level of the motor cooling auxiliary water tank and the liquid level of the battery cooling auxiliary water tank are lower than the minimum liquid level and the motor fluid infusion electromagnetic valve, the battery fluid infusion electromagnetic valve and the fluid infusion pump are normal, the vehicle body controller controls the low-voltage main relay to be closed; the vehicle control unit opens the motor fluid infusion electromagnetic valve, the battery fluid infusion electromagnetic valve and the fluid infusion pump, and respectively fills cooling fluid in the water supplement tank into the motor cooling auxiliary water tank and the battery cooling auxiliary water tank through pipelines.
In some embodiments: the vehicle controller opens the motor fluid infusion electromagnetic valve and closes the battery fluid infusion electromagnetic valve, and when the liquid level in the motor cooling auxiliary water tank is detected to be higher than the highest liquid level, the vehicle controller closes the motor fluid infusion electromagnetic valve and the fluid infusion pump, the vehicle body controller disconnects the low-voltage main relay, the power of a low-voltage system of the vehicle is cut off, and the vehicle returns to a sleep mode;
the vehicle controller closes the motor fluid infusion electromagnetic valve and opens the battery fluid infusion electromagnetic valve, when the liquid level in the battery cooling auxiliary water tank is detected to be higher than the highest liquid level, the vehicle controller closes the battery fluid infusion electromagnetic valve and the fluid infusion pump, the vehicle body controller disconnects the low-voltage main relay, the vehicle low-voltage system is powered off, and the vehicle returns to the sleep mode;
the vehicle controller opens both the motor liquid supplementing electromagnetic valve and the battery liquid supplementing electromagnetic valve, when the vehicle controller detects that the liquid level in the battery cooling auxiliary water tank is higher than the highest liquid level, the vehicle controller closes the battery liquid supplementing electromagnetic valve and reduces the rotating speed of a liquid supplementing pump, and when the liquid level in the motor cooling auxiliary water tank is higher than the highest liquid level, the vehicle body controller disconnects the low-voltage main relay, the vehicle low-voltage system is powered off, and the vehicle returns to a sleep mode;
the vehicle controller opens both the motor liquid supplementing electromagnetic valve and the battery liquid supplementing electromagnetic valve, when the vehicle controller detects that the liquid level in the motor cooling auxiliary water tank is higher than the highest liquid level, the vehicle controller closes the motor liquid supplementing electromagnetic valve and reduces the rotating speed of a liquid supplementing pump, and when the liquid level in the battery cooling auxiliary water tank is higher than the highest liquid level, the vehicle body controller disconnects the low-voltage main relay, the vehicle low-voltage system is powered off, and the vehicle returns to a sleep mode.
In some embodiments: the system is characterized by further comprising a pressure sensor, wherein the pressure sensor is positioned on a pipeline between the auxiliary water tank and the water replenishing tank and connected with a vehicle control unit, and the vehicle control unit adjusts the rotating speed of the liquid replenishing pump according to a pressure signal of the pipeline detected by the pressure sensor.
In some embodiments: when the fluid infusion pump fails, the vehicle control unit judges that automatic fluid infusion fails, transmits a fluid infusion pump fault signal to the vehicle-mounted T-BOX through the CAN network, the vehicle-mounted T-BOX latches the fluid infusion pump fault signal, and an alarm signal of the fluid infusion pump fault is displayed on an automobile instrument after the vehicle is started.
In some embodiments: when the whole vehicle is in any one or more states of vehicle unlocking, any vehicle door opening, vehicle starting, vehicle charging, battery power shortage and vehicle low-voltage system fault, the automatic liquid supplementing is stopped.
In some embodiments: the method also comprises the following steps of artificial fluid infusion:
the method comprises the following steps that a manual liquid supplementing signal is sent to a vehicle body controller by utilizing mobile electronic equipment or a switch, and the vehicle body controller controls a low-voltage main relay to be closed so as to electrify a low-voltage system of the whole vehicle;
the vehicle body controller sends a manual liquid supplementing signal to the vehicle controller, the vehicle controller opens a liquid supplementing electromagnetic valve and a liquid supplementing pump, and cooling liquid in a water supplementing tank is filled into the auxiliary water tank through a pipeline;
when the auxiliary water tank liquid level sensor detects that the liquid level signal of the auxiliary water tank reaches the maximum liquid level, the mobile electronic equipment or the switch is used again to control the vehicle body controller, and the vehicle body controller controls the low-voltage main relay to be disconnected and quit manual liquid supplementing.
The second aspect of the embodiment of this application provides a fluid infusion device of pure electric commercial car coolant liquid, the fluid infusion device includes:
the vehicle-mounted T-BOX is used for automatically awakening the whole vehicle CAN network within a set time period when the vehicle is in a static state;
the vehicle controller is used for detecting a liquid level signal of the auxiliary water tank through the auxiliary water tank liquid level sensor and transmitting the liquid level signal of the auxiliary water tank to the vehicle-mounted T-BOX through a vehicle CAN network;
the vehicle body controller is connected with the vehicle-mounted T-BOX, and controls the low-voltage main relay to be closed when the vehicle-mounted T-BOX judges that the liquid level signal of the auxiliary water tank is at the lowest liquid level, so that a whole vehicle low-voltage system is electrified;
when the auxiliary water tank liquid level sensor detects that a liquid level signal of the auxiliary water tank reaches the highest liquid level, the vehicle body controller controls the low-pressure main relay to be switched off, so that a low-pressure system of the whole vehicle is powered off, and the whole vehicle returns to a sleep mode after automatic liquid supplement is completed;
the vehicle control unit is used for opening and closing the liquid supplementing electromagnetic valve and the liquid supplementing pump, and the liquid supplementing pump is used for filling cooling liquid in the water supplementing tank into the auxiliary water tank through a pipeline.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides a liquid supplementing method and a liquid supplementing device for pure electric commercial vehicle coolant, and the liquid supplementing method is provided with an automatic liquid supplementing step, wherein the automatic liquid supplementing step is that firstly, a vehicle-mounted T-BOX automatically awakens a whole vehicle CAN network within a set time period when a vehicle is in a static state; then the vehicle controller detects a liquid level signal of the auxiliary water tank through an auxiliary water tank liquid level sensor and transmits the liquid level signal of the auxiliary water tank to the vehicle-mounted T-BOX through a vehicle CAN network; then the vehicle-mounted T-BOX judges whether the liquid level signal of the auxiliary water tank is in the lowest liquid level, if so, the next step is carried out, and if not, the whole vehicle returns to the sleep mode; then the vehicle-mounted T-BOX sends an automatic liquid supplementing request signal to a vehicle body controller, and the vehicle body controller controls a low-voltage main relay to be closed so as to electrify a low-voltage system of the whole vehicle; then the vehicle-mounted T-BOX sends an automatic liquid supplementing signal to the vehicle control unit, the vehicle control unit opens the liquid supplementing electromagnetic valve and the liquid supplementing pump, and the cooling liquid in the water supplementing tank is filled into the auxiliary water tank through a pipeline; and finally, when the auxiliary water tank liquid level sensor detects that the liquid level signal of the auxiliary water tank reaches the maximum liquid level, the vehicle body controller controls the low-pressure main relay to be switched off so as to enable the low-pressure system of the whole vehicle to be powered off, and the whole vehicle returns to the sleep mode after automatic liquid supplement.
Therefore, the vehicle-mounted T-BOX automatically wakes up the CAN network of the whole vehicle within a set time period when the vehicle is in a static state, the vehicle controller detects a liquid level signal of the auxiliary water tank through the auxiliary water tank liquid level sensor, when the water level of the auxiliary water tank reaches below the lowest liquid level, the vehicle-mounted T-BOX sends an automatic liquid supplementing request signal to the vehicle body controller, the vehicle body controller controls the low-pressure main relay to be closed, the vehicle-mounted T-BOX sends an automatic liquid supplementing signal to the vehicle controller, the vehicle controller opens the liquid supplementing electromagnetic valve and the liquid supplementing pump, and the cooling liquid in the water supplementing tank is filled into the auxiliary water tank through the pipeline until the liquid supplementing is complete and automatically returns to the sleep mode. This application can automated inspection expansion tank's liquid level height and automatic fluid infusion, and whole journey need not artificial control, has saved the high risk operation of artifical climbing filling. The automatic liquid supplementing only can supplement liquid within a set time period when the vehicle is in a static state, so that the common time period of most vehicle users is avoided, and the reliability of automatic liquid supplementing is ensured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart illustrating an automatic fluid infusion step in a fluid infusion method according to an embodiment of the present disclosure;
fig. 2 is a block diagram of a fluid infusion device according to an embodiment of the present application.
Reference numerals:
1. an onboard T-BOX; 2. a vehicle control unit; 3. a vehicle body controller; 4. the motor cools the auxiliary water tank; 5. a battery cooling auxiliary water tank; 6. a liquid level sensor of the motor cooling auxiliary water tank; 7. a battery cooling auxiliary water tank liquid level sensor; 8. a motor fluid infusion electromagnetic valve; 9. a battery fluid infusion electromagnetic valve; 10. a liquid supplementing pump; 11. a water replenishing tank; 12. a first check valve; 13. a second one-way valve; 14. and (3) a filter.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a liquid supplementing method and a liquid supplementing device for pure electric commercial vehicle cooling liquid, and the method and the device can solve the problem that liquid level detection and liquid supplementing operation of a pure electric commercial vehicle adopting a back type liquid cooling power battery in the related technology are inconvenient.
Referring to fig. 1 and 2, in a first aspect, an embodiment of the present application provides a liquid supplementing method for a pure electric commercial vehicle coolant, where the method includes:
And 3, judging whether an ignition switch is in an OFF gear position, whether a vehicle door is in a closed state, whether the whole vehicle is in a fortifying state and whether a liquid level signal of an auxiliary water tank is in the lowest liquid level by the vehicle-mounted T-BOX1, if so, entering the next step, and if not, returning the whole vehicle to the sleep mode.
And 4, the vehicle-mounted T-BOX1 sends an automatic liquid supplementing request signal to the vehicle body controller 3, and the vehicle body controller 3 controls the low-voltage main relay to be closed so as to electrify the whole vehicle low-voltage system.
And 5, sending an automatic liquid supplementing signal to the vehicle-mounted T-BOX1 to the vehicle controller 2, opening the liquid supplementing electromagnetic valve and the liquid supplementing pump 10 by the vehicle controller 2, and filling the cooling liquid in the water supplementing tank 11 into the auxiliary water tank through a pipeline.
And 6, when the auxiliary water tank liquid level sensor detects that the liquid level signal of the auxiliary water tank reaches the maximum liquid level, the vehicle body controller 3 controls the low-pressure main relay to be switched off so as to power off the low-pressure system of the whole vehicle, and the whole vehicle automatically completes liquid supplement and returns to the sleep mode.
According to the automatic liquid supplementing method, the vehicle-mounted T-BOX1 automatically awakens the whole vehicle CAN network within the set time period when the vehicle is in the static state, and the whole vehicle controller 2 detects the liquid level signal of the auxiliary water tank through the auxiliary water tank liquid level sensor.
When the water level of the auxiliary water tank is below the lowest liquid level, the vehicle-mounted T-BOX1 sends an automatic liquid supplementing request signal to the vehicle body controller 3, the vehicle body controller 3 controls the low-pressure main relay to be closed, the vehicle-mounted T-BOX1 sends an automatic liquid supplementing signal to the vehicle controller 2, the vehicle controller 2 opens the liquid supplementing electromagnetic valve and the liquid supplementing pump 10, and the cooling liquid in the water supplementing tank is filled into the auxiliary water tank through a pipeline until the liquid supplementing is complete and automatically returns to the sleep mode.
This application can automated inspection expansion tank's liquid level height and automatic fluid infusion, and whole journey need not artificial control, has saved the high risk operation of artifical climbing filling. The automatic liquid supplementing only can supplement liquid within a set time period when the vehicle is in a static state, so that the common time period of most vehicle users is avoided, and the reliability of automatic liquid supplementing is ensured.
In some alternative embodiments: the embodiment of the application provides a liquid supplementing method for pure electric commercial vehicle coolant, and in the liquid supplementing method, when a water supplementing tank liquid level sensor detects that the coolant of a water supplementing tank 11 is insufficient, a vehicle control unit 2 controls a liquid supplementing pump 10 to enter an idle running protection state within several seconds, and simultaneously sends a signal for requesting for exiting automatic liquid supplementing to a vehicle-mounted T-BOX 1.
The vehicle-mounted T-BOX1 sends an automatic fluid infusion failure signal to the vehicle controller 2 after receiving the exit automatic fluid infusion request signal, the vehicle controller 2 closes the fluid infusion electromagnetic valve and the fluid infusion pump 10 after receiving the automatic fluid infusion failure signal, the vehicle-mounted T-BOX1 latches the insufficient cooling fluid signal of the water infusion tank 11, and an alarm signal indicating that the liquid level in the water infusion tank 11 is insufficient is displayed on an automobile instrument after the vehicle is started.
In some alternative embodiments: referring to fig. 2, the embodiment of the application provides a liquid supplementing method for pure electric commercial vehicle coolant, a secondary water tank of the liquid supplementing method includes a motor cooling secondary water tank 4 and a battery cooling secondary water tank 5, and a secondary water tank liquid level sensor includes a motor cooling secondary water tank liquid level sensor 6 and a battery cooling secondary water tank liquid level sensor 7.
The liquid supplementing electromagnetic valve comprises a motor liquid supplementing electromagnetic valve 8 and a battery liquid supplementing electromagnetic valve 9, the motor liquid supplementing electromagnetic valve 8 is positioned on a pipeline between the motor cooling auxiliary water tank 4 and the liquid supplementing pump 10, and the battery liquid supplementing electromagnetic valve 9 is positioned on a pipeline between the battery cooling auxiliary water tank 5 and the liquid supplementing pump 10.
A first one-way valve 12 is arranged on a pipeline between the motor cooling auxiliary water tank 4 and the fluid infusion pump 10, and a second one-way valve 13 is arranged on a pipeline between the battery cooling auxiliary water tank 5 and the fluid infusion pump 10. A filter 14 is provided on a pipe between the replenishment pump 10 and the replenishment tank 11, and the filter 14 is used to filter the coolant entering the motor-cooling expansion tank 4 and the battery-cooling expansion tank 5.
A pressure sensor (not shown in the figure) is further arranged on the pipeline between the auxiliary water tank and the water replenishing tank, the pressure sensor is connected with the vehicle controller 2, and the vehicle controller 2 adjusts the rotating speed of the liquid replenishing pump 10 according to a pressure signal of the pipeline detected by the pressure sensor. When the pressure sensor detects that the pressure of the pipeline is increased, the vehicle control unit 2 reduces the rotating speed of the fluid infusion pump 10, and the fluid infusion pump 10 and the pipeline are protected.
In some alternative embodiments: the embodiment of the application provides a liquid supplementing method for pure electric commercial vehicle coolant, and in the liquid supplementing method, when the liquid level of a motor cooling auxiliary water tank 4 is lower than the lowest liquid level and a motor liquid supplementing electromagnetic valve 8 and a liquid supplementing pump 10 are normal, a vehicle body controller 3 controls a low-voltage main relay to be closed; the vehicle control unit 2 opens the motor fluid infusion solenoid valve 8 and the fluid infusion pump 10, and fills the cooling fluid in the fluid infusion tank 11 into the motor cooling auxiliary water tank 4 through a pipeline.
When the liquid level of the battery cooling auxiliary water tank 5 is lower than the lowest liquid level and the battery fluid infusion electromagnetic valve 9 and the fluid infusion pump 10 are normal, the vehicle body controller 3 controls the low-voltage main relay to be closed; the vehicle control unit 2 opens the battery fluid infusion electromagnetic valve 9 and the fluid infusion pump 10, and fills the cooling fluid in the fluid infusion tank 11 into the battery cooling auxiliary water tank 5 through a pipeline.
When the liquid level of the motor cooling auxiliary water tank 4 and the liquid level of the battery cooling auxiliary water tank 5 are lower than the lowest liquid level and the motor liquid supplementing electromagnetic valve 8, the battery liquid supplementing electromagnetic valve 9 and the liquid supplementing pump 10 are normal, the vehicle body controller 3 controls the low-voltage main relay to be closed; the vehicle control unit 2 opens the motor fluid infusion solenoid valve 8, the battery fluid infusion solenoid valve 9 and the fluid infusion pump 10, and fills the cooling fluid in the fluid infusion tank 11 into the motor cooling auxiliary water tank 4 and the battery cooling auxiliary water tank 5 through pipelines respectively.
In the liquid supplementing process, when the whole vehicle is in any one or more states of vehicle unlocking, any vehicle door opening, vehicle starting, vehicle charging, battery power shortage and vehicle low-voltage system faults, automatic liquid supplementing is stopped.
In the liquid supplementing process, when the liquid supplementing pump 10 has a fault, the vehicle controller 2 judges that automatic liquid supplementing fails, transmits a liquid supplementing pump fault signal to the vehicle-mounted T-BOX1 through the CAN network, the vehicle-mounted T-BOX1 latches the liquid supplementing pump fault signal, and an alarm signal of the liquid supplementing pump fault is displayed on an automobile instrument after the vehicle is started.
In some alternative embodiments: the embodiment of the application provides a liquid supplementing method for pure electric commercial vehicle coolant, in the liquid supplementing method, a vehicle control unit 2 opens a motor liquid supplementing electromagnetic valve 8 and closes a battery liquid supplementing electromagnetic valve 9, when a motor cooling auxiliary water tank liquid level sensor 6 detects that the liquid level in a motor cooling auxiliary water tank 4 is higher than the highest liquid level, the vehicle control unit 2 closes the motor liquid supplementing electromagnetic valve 8 and a liquid supplementing pump 10, a vehicle body controller disconnects a low-voltage main relay, a vehicle low-voltage system is powered off, and the vehicle returns to a sleep mode.
The vehicle controller 2 closes the motor fluid infusion electromagnetic valve 8 and opens the battery fluid infusion electromagnetic valve 9, when the battery cooling auxiliary water tank liquid level sensor 7 detects that the liquid level in the battery cooling auxiliary water tank 5 is higher than the highest liquid level, the vehicle controller 3 closes the battery fluid infusion electromagnetic valve 9 and the fluid infusion pump 10, the vehicle body controller 2 disconnects the low-voltage main relay, the low-voltage system of the vehicle is powered off, and the vehicle returns to the sleep mode.
In some alternative embodiments: the embodiment of the application provides a liquid supplementing method for pure electric commercial vehicle cooling liquid, and the liquid supplementing method further comprises the following steps of:
step 101, sending a manual fluid infusion signal to a vehicle body controller 3 by using mobile electronic equipment or a switch, and controlling a low-voltage main relay to be closed by the vehicle body controller 3 so as to electrify a low-voltage system of the whole vehicle.
102, the vehicle body controller 3 sends a manual fluid infusion signal to the vehicle control unit 2, the vehicle control unit 2 opens the fluid infusion electromagnetic valve and the fluid infusion pump 10, and the cooling fluid in the fluid infusion tank 11 is filled into the auxiliary water tank through a pipeline.
And 103, when the liquid level sensor of the auxiliary water tank detects that the liquid level signal of the auxiliary water tank reaches the highest liquid level, controlling the vehicle body controller 3 by using the mobile electronic equipment or the switch again, and controlling the low-voltage main relay to be disconnected by the vehicle body controller 3 to withdraw from manual liquid supplement.
Specifically, when the motor cooling pipeline is overhauled, the low-voltage main relay is controlled to be closed by directly operating the vehicle body controller 3 through the mobile electronic device (such as a mobile phone APP remote control) or the switch, so that the whole vehicle low-voltage system is powered on, and the whole vehicle controller 2 enters a manual liquid supplementing mode. The vehicle control unit 2 controls the motor fluid infusion electromagnetic valve 8 to be opened, the fluid infusion pump 10 is started to work at a high rotating speed after a plurality of seconds, and cooling fluid in the fluid infusion tank 11 is filled into the motor cooling auxiliary water tank 4 through a pipeline. After fluid infusion is completed, the vehicle body controller 3 is controlled through the mobile electronic device or the switch, the vehicle body controller 3 controls the low-voltage main relay to be switched off, and the vehicle controller 2 exits the manual fluid infusion mode.
When the battery cooling pipeline is overhauled, the low-voltage main relay is controlled to be closed by directly operating the vehicle body controller 3 through the mobile electronic equipment (such as a mobile phone APP remote control) or the switch, so that the whole vehicle low-voltage system is powered on, and the whole vehicle controller 2 enters a manual liquid supplementing mode. The vehicle control unit 2 controls the battery fluid infusion electromagnetic valve 9 to be opened, the fluid infusion pump 10 is started to work at a high rotating speed after a plurality of seconds, and cooling fluid in the fluid infusion tank 11 is filled into the battery cooling auxiliary water tank 5 through a pipeline. After fluid infusion is completed, the vehicle body controller 3 is controlled through the mobile electronic device or the switch, the vehicle body controller 3 controls the low-voltage main relay to be switched off, and the vehicle controller 2 exits the manual fluid infusion mode.
Referring to fig. 2, a second aspect of the embodiment of the present application provides a liquid supplementing device for a pure electric commercial vehicle coolant, where the liquid supplementing device includes:
and the vehicle-mounted T-BOX1 and the vehicle-mounted T-BOX1 are used for automatically waking up the whole CAN network within a set time period when the vehicle is in a static state. The onboard T-BOX1 was at rest 2 a day in the morning of the vehicle: 00 the CAN network of the whole vehicle is automatically awakened, so that the common time period of most vehicle users is avoided, and the signal transmission of the whole vehicle in the starting state is not influenced.
And the vehicle controller 2 is used for detecting a liquid level signal of the auxiliary water tank through the auxiliary water tank liquid level sensor and transmitting the liquid level signal of the auxiliary water tank to the vehicle-mounted T-BOX1 through a vehicle CAN network.
The vehicle body controller 3 is connected with the vehicle-mounted T-BOX1, and when the vehicle-mounted T-BOX1 judges that the liquid level signal of the auxiliary water tank is at the lowest liquid level, the vehicle body controller 3 controls the low-pressure main relay to be closed so as to electrify a low-pressure system of the whole vehicle;
when the auxiliary water tank liquid level sensor detects that the liquid level signal of the auxiliary water tank reaches the maximum liquid level, the vehicle body controller 3 controls the low-pressure main relay to be switched off, so that the low-pressure system of the whole vehicle is powered off, and the whole vehicle returns to the sleep mode after automatic liquid supplement.
The vehicle-mounted water supply system comprises a liquid supplementing electromagnetic valve and a liquid supplementing pump 10, wherein the liquid supplementing electromagnetic valve and the liquid supplementing pump 10 are both connected with a vehicle control unit 2, the vehicle control unit 2 is used for opening and closing the liquid supplementing electromagnetic valve and the liquid supplementing pump 10, and the liquid supplementing pump 10 is used for filling cooling liquid in a water supplementing tank 11 into an auxiliary water tank through a pipeline.
Principle of operation
The embodiment of the application provides a liquid supplementing method and a liquid supplementing device for pure electric commercial vehicle coolant, and the liquid supplementing method is provided with an automatic liquid supplementing step, wherein in the automatic liquid supplementing step, a vehicle-mounted T-BOX1 automatically awakens a whole vehicle CAN network within a set time period when a vehicle is in a static state; and then the vehicle controller 2 detects a liquid level signal of the auxiliary water tank through an auxiliary water tank liquid level sensor, and transmits the liquid level signal of the auxiliary water tank to the vehicle-mounted T-BOX1 through a vehicle CAN network.
Then the vehicle-mounted T-BOX1 judges whether the liquid level signal of the auxiliary water tank is in the lowest liquid level, if so, the next step is carried out, and if not, the whole vehicle returns to the sleep mode; and then the vehicle-mounted T-BOX1 sends an automatic liquid supplementing request signal to the vehicle body controller 3, and the vehicle body controller 3 controls the low-voltage main relay to be closed so as to electrify the low-voltage system of the whole vehicle.
Then the vehicle-mounted T-BOX1 sends an automatic fluid infusion signal to the vehicle control unit 2, the vehicle control unit 2 opens the fluid infusion electromagnetic valve and the fluid infusion pump 10, and the cooling fluid in the water infusion tank 11 is filled into the auxiliary water tank through a pipeline; and finally, when the auxiliary water tank liquid level sensor detects that the liquid level signal of the auxiliary water tank reaches the maximum liquid level, the vehicle body controller 3 controls the low-pressure main relay to be switched off so as to power off the low-pressure system of the whole vehicle, and the whole vehicle automatically completes liquid supplement and returns to the sleep mode.
Therefore, the vehicle-mounted T-BOX1 automatically wakes up the CAN network of the whole vehicle in the set time period when the vehicle is in a static state, the whole vehicle controller 2 detects the liquid level signal of the auxiliary water tank through the auxiliary water tank liquid level sensor, when the water level of the auxiliary water tank reaches below the lowest liquid level, the vehicle-mounted T-BOX1 sends an automatic liquid supplementing request signal to the vehicle body controller 3, the vehicle body controller 3 controls the low-voltage main relay to be closed, and the vehicle-mounted T-BOX1 sends an automatic liquid supplementing signal to the whole vehicle controller 2.
The vehicle control unit 2 opens the fluid infusion solenoid valve and the fluid infusion pump 10, and fills the cooling fluid in the fluid infusion tank 11 into the auxiliary water tank through the pipeline until the fluid infusion is complete and automatically returns to the sleep mode. This application can automated inspection expansion tank's liquid level height and automatic fluid infusion, whole journey need not artificial control, has saved the high risk operation of artifical climbing filling. The automatic liquid supplementing only can be performed within a set time period when the vehicle is in a static state, so that the common time period of most vehicle users is avoided, and the reliability of automatic liquid supplementing is ensured.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus 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 apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The liquid supplementing method of the pure electric commercial vehicle cooling liquid is characterized by comprising the following steps of:
the vehicle-mounted T-BOX (1) automatically wakes up the whole CAN network within a set time period when the vehicle is in a static state;
the vehicle controller (2) detects a liquid level signal of the auxiliary water tank through an auxiliary water tank liquid level sensor and transmits the liquid level signal of the auxiliary water tank to the vehicle-mounted T-BOX (1) through a vehicle CAN network;
the vehicle-mounted T-BOX (1) judges whether a liquid level signal of the auxiliary water tank is in the lowest liquid level, if so, the next step is carried out, and if not, the whole vehicle returns to the sleep mode;
the vehicle-mounted T-BOX (1) sends an automatic liquid supplementing request signal to a vehicle body controller (3), and the vehicle body controller (3) controls a low-voltage main relay to be closed so as to electrify a whole vehicle low-voltage system;
the vehicle-mounted T-BOX (1) sends an automatic fluid infusion signal to the vehicle control unit (2), the vehicle control unit (2) opens a fluid infusion electromagnetic valve and a fluid infusion pump (10), and coolant in a water infusion tank (11) is filled into an auxiliary water tank through a pipeline;
when the auxiliary water tank liquid level sensor detects that the liquid level signal of the auxiliary water tank reaches the maximum liquid level, the vehicle body controller (3) controls the low-pressure main relay to be switched off, so that the low-pressure system of the whole vehicle is powered off, and the whole vehicle is automatically replenished with liquid to return to the sleep mode.
2. The method for supplementing pure electric commercial vehicle coolant according to claim 1, further comprising the following steps:
when the liquid level sensor of the water replenishing tank detects that the cooling liquid of the water replenishing tank is insufficient, the vehicle control unit (2) controls the liquid replenishing pump (10) to enter an idle running protection state within a few seconds and simultaneously sends a signal for requesting the vehicle-mounted T-BOX (1) to exit from automatic liquid replenishing;
the vehicle-mounted T-BOX (1) sends an automatic fluid infusion failure signal to the vehicle control unit (2) after receiving the automatic fluid infusion quitting request signal, the vehicle control unit (2) closes the fluid infusion electromagnetic valve and the fluid infusion pump (10) after receiving the automatic fluid infusion failure signal, and an alarm signal of insufficient liquid level in the fluid infusion tank (11) is displayed on an automobile instrument.
3. The liquid supplementing method for the pure electric commercial vehicle coolant liquid as claimed in claim 1, wherein:
the auxiliary water tank comprises a motor cooling auxiliary water tank (4) and a battery cooling auxiliary water tank (5), the liquid supplementing electromagnetic valve comprises a motor liquid supplementing electromagnetic valve (8) and a battery liquid supplementing electromagnetic valve (9), the motor liquid supplementing electromagnetic valve (8) is positioned on a pipeline between the motor cooling auxiliary water tank (4) and a liquid supplementing pump (10), and the battery liquid supplementing electromagnetic valve (9) is positioned on a pipeline between the battery cooling auxiliary water tank (5) and the liquid supplementing pump (10);
and a first one-way valve (12) is further arranged on a pipeline between the motor cooling auxiliary water tank (4) and the liquid supplementing pump (10), and a second one-way valve (13) is further arranged on a pipeline between the battery cooling auxiliary water tank (5) and the liquid supplementing pump (10).
4. The liquid supplementing method for the pure electric commercial vehicle coolant liquid as claimed in claim 3, wherein:
when the liquid level of the motor cooling auxiliary water tank (4) is lower than the lowest liquid level and the motor liquid supplementing electromagnetic valve (8) and the liquid supplementing pump (10) are normal, the vehicle body controller (3) controls the low-voltage main relay to be closed; the vehicle control unit (2) opens a motor fluid infusion electromagnetic valve (8) and a fluid infusion pump (10), and fills cooling fluid in a fluid infusion tank (11) into a motor cooling auxiliary water tank (4) through a pipeline;
when the liquid level of the battery cooling auxiliary water tank (5) is lower than the lowest liquid level and the battery fluid infusion electromagnetic valve (9) and the fluid infusion pump (10) are normal, the vehicle body controller (3) controls the low-voltage main relay to be closed; the vehicle control unit (2) opens the battery fluid infusion electromagnetic valve (9) and the fluid infusion pump (10), and fills the cooling fluid in the fluid infusion tank (11) into the battery cooling auxiliary water tank (5) through a pipeline;
when the liquid level of the motor cooling auxiliary water tank (4) and the liquid level of the battery cooling auxiliary water tank (5) are lower than the lowest liquid level and the motor liquid supplementing electromagnetic valve (8), the battery liquid supplementing electromagnetic valve (9) and the liquid supplementing pump (10) are normal, the vehicle body controller (3) controls the low-voltage main relay to be closed; the vehicle control unit (2) opens the motor fluid infusion electromagnetic valve (8), the battery fluid infusion electromagnetic valve (9) and the fluid infusion pump (10), and respectively fills cooling fluid in the fluid infusion tank (11) into the motor cooling auxiliary water tank (4) and the battery cooling auxiliary water tank (5) through pipelines.
5. The liquid supplementing method for the pure electric commercial vehicle coolant liquid as claimed in claim 4, wherein:
the vehicle controller (2) opens a motor fluid infusion electromagnetic valve (8), closes a battery fluid infusion electromagnetic valve (9), and when the liquid level in the motor cooling auxiliary water tank (4) is detected to be higher than the highest liquid level, the vehicle controller (2) closes the motor fluid infusion electromagnetic valve (8) and a fluid infusion pump (10), the vehicle body controller (3) disconnects a low-voltage main relay, a low-voltage system of the vehicle is powered off, and the vehicle returns to a sleep mode;
the vehicle controller (2) closes the motor fluid infusion electromagnetic valve (8), opens the battery fluid infusion electromagnetic valve (9), and when the liquid level in the battery cooling auxiliary water tank (5) is detected to be higher than the highest liquid level, the vehicle controller (2) closes the battery fluid infusion electromagnetic valve (9) and the fluid infusion pump (10), the vehicle body controller (3) disconnects the low-voltage main relay, the whole vehicle low-voltage system is powered off, and the whole vehicle returns to the sleep mode;
the vehicle controller (2) opens both the motor fluid infusion electromagnetic valve (8) and the battery fluid infusion electromagnetic valve (9), when the vehicle controller (2) detects that the liquid level in the battery cooling auxiliary water tank (5) is higher than the highest liquid level, the vehicle controller (2) closes the battery fluid infusion electromagnetic valve (9), reduces the rotating speed of the fluid infusion pump (10), when the liquid level in the motor cooling auxiliary water tank (4) is detected to be higher than the highest liquid level, the vehicle body controller (3) disconnects the low-voltage main relay, the vehicle low-voltage system is powered off, and the vehicle returns to a sleep mode;
vehicle control unit (2) all opens motor fluid infusion solenoid valve (8) and battery fluid infusion solenoid valve (9), when vehicle control unit (2) detected earlier that liquid level is higher than the highest liquid level in motor cooling expansion tank (4), vehicle control unit (2) closed motor fluid infusion solenoid valve (8), and reduce fluid infusion pump (10) rotational speed, when detecting that liquid level is higher than the highest liquid level in battery cooling expansion tank (5), automobile body controller (3) disconnection low pressure main relay, whole car low pressure system outage, the whole car returns the sleep mode.
6. The liquid supplementing method for the pure electric commercial vehicle coolant liquid as claimed in claim 1, wherein:
the system is characterized by further comprising a pressure sensor, wherein the pressure sensor is positioned on a pipeline between the auxiliary water tank and the water replenishing tank (11), the pressure sensor is connected with the vehicle control unit (2), and the vehicle control unit (2) adjusts the rotating speed of the liquid replenishing pump (10) according to a pressure signal of the pipeline detected by the pressure sensor.
7. The liquid supplementing method for the pure electric commercial vehicle coolant as claimed in claim 1, wherein:
when the fluid infusion pump (10) fails, the vehicle control unit (2) judges that automatic fluid infusion fails, transmits a fault signal of the fluid infusion pump (10) to the vehicle-mounted T-BOX (1) through the CAN network, the vehicle-mounted T-BOX (1) latches the fault signal of the fluid infusion pump (10), and an alarm signal of the fault of the fluid infusion pump (10) is displayed on an automobile instrument after a vehicle is started.
8. The liquid supplementing method for the pure electric commercial vehicle coolant liquid as claimed in claim 1, wherein:
when the whole vehicle is in any one or more states of vehicle unlocking, any vehicle door opening, vehicle starting, vehicle charging, battery power shortage and vehicle low-voltage system fault, the automatic liquid supplementing is stopped.
9. The liquid supplementing method for the pure electric commercial vehicle coolant liquid according to claim 1, further comprising the step of manually supplementing liquid:
manual liquid supplementing signals are sent to the vehicle body controller (3) by using the mobile electronic equipment or the switch, and the vehicle body controller (3) controls the low-voltage main relay to be closed so as to electrify a low-voltage system of the whole vehicle;
the vehicle body controller (3) sends a manual liquid supplementing signal to the vehicle control unit (2), the vehicle control unit (2) opens the liquid supplementing electromagnetic valve and the liquid supplementing pump (10), and the cooling liquid in the water supplementing tank (11) is filled into the auxiliary water tank through a pipeline;
when the auxiliary water tank liquid level sensor detects that the liquid level signal of the auxiliary water tank reaches the maximum liquid level, the mobile electronic equipment or the switch is reused for controlling the vehicle body controller (3), and the vehicle body controller (3) controls the low-voltage main relay to be disconnected and quit manual liquid supplementing.
10. The utility model provides a liquid supplementing device of pure electric commercial car coolant liquid which characterized in that, the liquid supplementing device includes:
the vehicle-mounted T-BOX (1) is used for automatically waking up the whole vehicle CAN network within a set time period when the vehicle is in a static state;
the vehicle control unit (2) is used for detecting a liquid level signal of the auxiliary water tank through an auxiliary water tank liquid level sensor and transmitting the liquid level signal of the auxiliary water tank to the vehicle-mounted T-BOX (1) through a vehicle CAN network;
the vehicle body controller (3) is connected with the vehicle-mounted T-BOX (1), and when the vehicle-mounted T-BOX (1) judges that the liquid level signal of the auxiliary water tank is at the lowest liquid level, the vehicle body controller (3) controls the low-pressure main relay to be closed so as to electrify a whole vehicle low-pressure system;
when the auxiliary water tank liquid level sensor detects that a liquid level signal of the auxiliary water tank reaches the highest liquid level, the vehicle body controller (3) controls the low-pressure main relay to be switched off, so that a low-pressure system of the whole vehicle is powered off, and the whole vehicle returns to a sleep mode after automatic liquid supplement is completed;
the system comprises a liquid supplementing electromagnetic valve and a liquid supplementing pump (10), wherein the liquid supplementing electromagnetic valve and the liquid supplementing pump (10) are connected with a vehicle control unit (2), the vehicle control unit (2) is used for opening and closing the liquid supplementing electromagnetic valve and the liquid supplementing pump (10), and the liquid supplementing pump (10) is used for filling cooling liquid in a water supplementing tank (11) into an auxiliary water tank through a pipeline.
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| CN202110738608.4A CN113500947B (en) | 2021-06-30 | 2021-06-30 | Liquid supplementing method and device for pure electric commercial vehicle cooling liquid |
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| CN202110738608.4A CN113500947B (en) | 2021-06-30 | 2021-06-30 | Liquid supplementing method and device for pure electric commercial vehicle cooling liquid |
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