CN114407608A - Electric motor coach integrated liquid cooling air conditioner control method and system and electric motor coach - Google Patents
Electric motor coach integrated liquid cooling air conditioner control method and system and electric motor coach Download PDFInfo
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- CN114407608A CN114407608A CN202210092508.3A CN202210092508A CN114407608A CN 114407608 A CN114407608 A CN 114407608A CN 202210092508 A CN202210092508 A CN 202210092508A CN 114407608 A CN114407608 A CN 114407608A
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- air conditioner
- liquid cooling
- cooling air
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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
- B60H1/00371—Air-conditioning arrangements specially adapted for particular vehicles for vehicles carrying large numbers of passengers, e.g. buses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to an electric motor coach integrated liquid cooling air conditioner control method, a system and an electric motor coach, which comprises the following steps: judging whether the whole vehicle is in a non-charging state and the charging gun is in a gun inserting state; if the whole vehicle is in a non-charging state and the charging gun is in a gun plugging state, sequentially controlling a compressor, a condensing fan and an evaporating fan of the integrated liquid cooling air conditioner to be closed within a set time of N seconds, and finishing the shutdown of the integrated liquid cooling air conditioner during integration, otherwise controlling the integrated liquid cooling air conditioner to continue working; after the integrated liquid cooling air conditioner is shut down, a power-off instruction is sent out, power supply to the air conditioner panel is cut off, power supply of the DCDC and the water pump is cut off, and then the auxiliary contactor in the high-voltage box is cut off.
Description
Technical Field
The invention relates to the technical field of electric motor coaches, in particular to an electric motor coach integrated liquid cooling air conditioner control method and system and an electric motor coach.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
At present, all cities basically complete the transformation from fuel buses to pure buses. Some cities also make fuel oil vehicle elimination schedules, gradually eliminate fuel oil vehicles in stages, and realize pure electric operation of the cities. The service life of the power battery becomes the most concerned problem of a user, so that the power battery of the liquid cooling system is popularized in the market comprehensively, the service life of the power battery can be prolonged by more than three years by adopting the liquid cooling system in the same battery attenuation, the protection of the full life cycle of the power battery of the bus is basically completed, and the integrated liquid cooling system with the electric air conditioner is popularized in the market comprehensively due to low cost and good stability. The power battery generates a large amount of heat in the charging process, a liquid cooling system is required to cool, and the temperature of each monomer of the power battery is kept constant.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a control method of an integrated liquid cooling air conditioner of an electric motor coach, and solves the problem of hard cut-off existing in the opening and closing of a liquid cooling part of the integrated liquid cooling air conditioner.
In order to achieve the purpose, the invention adopts the following technical scheme
In a first aspect, an embodiment of the present invention provides a method for controlling an electric motor coach integrated liquid cooling air conditioner, including the following steps:
judging whether the whole vehicle is in a non-charging state and the charging gun is in a gun inserting state;
if the whole vehicle is in a non-charging state and the charging gun is in a gun plugging state, the compressor, the condensing fan and the evaporating fan of the integrated liquid cooling air conditioner are sequentially controlled to be closed within a set time, the liquid cooling air conditioner is shut down when integration is completed, and otherwise, the integrated liquid cooling air conditioner is controlled to continue to work;
after the integrated liquid cooling air conditioner is shut down, a power-off instruction is sent out, power supply to the air conditioner panel is cut off, power supply of the DCDC and the water pump is cut off, and then the auxiliary contactor in the high-voltage box is cut off.
Optionally, the set time is 4-6 seconds.
Optionally, after the entire vehicle is determined to be in a non-charging state and the charging gun is in a gun plugging state, if the air conditioner is turned off and the bus current of the air conditioner is less than the set value at the nth second of the set time, the power-off operation is executed, and if the air conditioner is not turned off or the bus current of the air conditioner is not less than the set value at the nth second of the set time, the power-off operation is forcibly executed at the N +1 th second.
Optionally, the set value is 5A-7A.
Optionally, the method for controlling the electric motor coach integrated liquid cooling air conditioner further comprises the following steps:
after receiving a parking charging state instruction sent by a BMS system when starting charging, controlling an auxiliary contactor in a high-voltage box of a power battery to be closed;
receiving an integrated liquid cooling demand instruction sent by a BMS system;
and controlling the DCDC in the integrated power supply to be closed, so that the integrated liquid cooling air conditioner is powered on, and then controlling the water pump to work.
Optionally, the temperature value of the DCDC is received in real time, and when the temperature value of the DCDC reaches the fan operating temperature value, the fan is controlled to operate.
Optionally, after receiving the command of the closed state of the auxiliary contactor of the high-voltage box transmitted by the BMS system, the BMS system starts to judge whether the liquid cooling is required.
Optionally, if a parking non-charging state command sent by the BMS system is received, a command to disconnect the auxiliary contactor in the power battery high-voltage box is sent.
In a second aspect, an embodiment of the present invention provides an electric motor coach integrated liquid cooling air conditioner control system, including:
a judging module: is configured to judge whether the whole vehicle is in a non-charging state and the charging gun is in a gun inserting state;
an air conditioner shutdown module: if the whole vehicle is in a non-charging state and the charging gun is in a gun plugging state, the compressor, the condensing fan and the evaporating fan of the integrated liquid cooling air conditioner are sequentially closed within a set time of N seconds, and the shutdown of the integrated liquid cooling air conditioner is finished during integration, otherwise, the integrated liquid cooling air conditioner continues to work;
a power-off module: after the integrated liquid cooling air conditioner is shut down, the power supply to the air conditioner panel is cut off, the power supply of the DCDC and the water pump is cut off, and the auxiliary contactor in the high-voltage box is cut off in sequence.
In a third aspect, an embodiment of the invention provides an electric motor coach, which is provided with the electric motor coach integrated liquid cooling air conditioner control system of the second aspect.
The invention has the beneficial effects that:
1. according to the control method, when the air conditioner is shut down, the compressor, the condensing fan and the evaporating fan are sequentially closed within N seconds, after the air conditioner is shut down, power supply to the air conditioner is cut off, soft shutdown is achieved, compared with the traditional method that after charging is completed, the power supply to the air conditioner is cut off by a support, the problem of hard cutoff existing when the air conditioner is shut down is solved, the compressor can be completely balanced when the air conditioner is powered off, and the service life of the air conditioner is prolonged.
2. According to the control method, the ATS fan is started to work according to the temperature of the DCDC, the ATS control is optimized in stages, and the control method works in stages according to the water pump and the fan according to the actual requirement of the integrated power supply, so that an energy-saving control strategy is realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a diagram of the working control of an integrated liquid-cooled air conditioning system according to embodiment 1 of the present invention;
FIG. 2 is a cooling energy supply diagram of the integrated liquid cooling air conditioner in accordance with embodiment 1 of the present invention;
FIG. 3 is a flowchart of a control method according to embodiment 1 of the present invention;
Detailed Description
Example 1
The embodiment provides a liquid cooling air conditioner control method for an electric motor coach, which is applied to an integrated liquid cooling air conditioner system of the electric motor coach, as shown in fig. 1, the integrated liquid cooling air conditioner in the embodiment is connected with a vehicle control unit, the vehicle control unit controls the operation of the integrated liquid cooling air conditioner, the vehicle control unit is connected with an integrated power supply containing a DCDC (direct current DC), the operation of the integrated power supply can be controlled, the vehicle control unit is also connected with a BMS system and an ATS (autonomous System) cooling system, the operation of the integrated liquid cooling air conditioner can be controlled, and as shown in fig. 2, the integrated power supply supplies power to the integrated liquid cooling air conditioner, the BMS system, the ATS cooling system and the vehicle control unit.
The BMS system is used for sending the actual liquid cooling demand of the battery and awakening the whole vehicle controller and the integrated power supply.
The output of the power battery reaches the integrated power supply through the uniform power distribution of the high-voltage box, on one hand, the high-voltage power distribution of the integrated power supply is output to the integrated liquid cooling air conditioner, and on the other hand, the DCDC of the integrated power supply outputs low voltage to the ATS heat dissipation system and the whole vehicle controller.
As shown in fig. 3, the control method includes the steps of:
and the vehicle controller judges a signal sent by the BMS system from the beginning of the vehicle parking and charging gun insertion, and judges whether the vehicle is in a parking charging state.
And after the auxiliary contactor is closed, the vehicle control unit receives the auxiliary contactor state instruction sent by the BMS system, and the BMS system transmits the auxiliary contactor state of the high-voltage box back to the vehicle control unit through a message. And when the vehicle control unit cannot receive the command of the closed state of the auxiliary contactor, judging whether the BMS system fails, and if so, processing a fault mechanism corresponding to fault installation.
The vehicle control unit judges the closing state of the auxiliary contactor in the high-voltage box according to the message of the auxiliary contactor state sent by the BMS system, and judges whether the BMS system has a liquid cooling requirement when judging that the auxiliary contactor is in the closing state.
And when the vehicle control unit receives that the BMS system does not have the liquid cooling requirement, entering next judgment, and continuously judging until receiving an instruction that the BMS system has the liquid cooling requirement.
When the vehicle control unit receives the command that the BMS system has the liquid cooling demand, send the power supply instruction, vehicle control unit sends the closed instruction of DCDC in the integrated power at first for the DCDC of integrated power is closed, and control systems such as the air conditioner panel of integrated liquid cooling air conditioner are electrified, and air conditioning system normally works, then normal controller control water pump work, and the water pump in this embodiment is the ATS water pump, and ATS water pump work cools off integrated power's DCDC, guarantees that integrated power's DCDC temperature is normal.
In the charging process, the vehicle control unit receives the acquired DCDC temperature value in real time, when the DCDC temperature value reaches the ATS fan working temperature value, the vehicle control unit generates an instruction to control the ATS fan to work, otherwise, the vehicle control unit continuously judges whether the DCDC temperature value reaches the ATS fan working temperature value, and when the DCDC temperature value does not reach the ATS fan working temperature value, the ATS fan does not work.
In this embodiment, the integrated power supply supplies power to the ATS heat dissipation system and controls the ATS water pump or the fan to operate according to a predetermined program, so as to ensure that the integrated power supply is not overheated, avoid affecting the operation of the integrated liquid cooling air conditioner, start the ATS fan to operate according to the DCDC temperature, optimize the ATS control in stages, and operate in stages according to the water pump and the fan according to the actual demand of the integrated power supply, thereby implementing an energy-saving control strategy.
When charging is complete, charging is complete as indicated by the charger and confirmation is complete at the charger.
And judging whether the whole vehicle is in a non-charging state and the charging gun is in a gun plugging state, sending a shutdown instruction when the whole vehicle controller receives an instruction that the whole vehicle is in the non-charging state and the charging gun is in the gun plugging state, which is sent by a BMS system, and sequentially controlling a compressor, a condensing fan and an evaporating fan of the integrated liquid cooling air conditioner to be closed within a set time of N seconds to complete shutdown of the integrated liquid cooling air conditioner.
The setting time N seconds is 4 to 6 seconds, and the setting time in this embodiment is 5 seconds.
And when the vehicle control unit receives the command that the vehicle is still in a charging state sent by the BMS system, the vehicle control unit controls the integrated liquid cooling air conditioner to continue to work normally.
And when the vehicle control unit receives the time of 5 seconds after the command of the non-charging state and the gun plugging state sent by the BMS system is received, the vehicle control unit judges whether the air conditioner is shut down and the bus current of the air conditioner is less than a set value.
The set value is 5A to 7A, and the set value in this embodiment is 6A.
When the vehicle control unit judges that the air conditioner is turned off and the bus current of the air conditioner power supply is less than 6A in the 5 th second, the vehicle control unit sends a power-off instruction and executes the action I: cutting off power supply to the air conditioner panel, and performing the second action: and disconnecting the DCDC and the water pump and then executing action three: the auxiliary contactor in the high-voltage box is cut off.
When the vehicle control unit judges that the air conditioner is not in the shutdown state or the bus current of the air conditioner power supply is not less than 6A in the 5 th second, a power-off instruction is forcibly sent out in the N +1 th second, namely the 6 th second, and the first action is executed: cutting off power supply to the air conditioner panel, and performing the second action: and disconnecting the DCDC and the water pump and then executing action three: the auxiliary contactor in the high-voltage box is cut off, and the safety is ensured by adopting the steps.
According to the control method, when the air conditioner is shut down, the compressor, the condensing fan and the evaporating fan are sequentially closed within 5 seconds of the set time, after the air conditioner is shut down, power supply to the air conditioner is cut off, soft shutdown is achieved, compared with the traditional method that after charging is completed, the power supply to the air conditioner is cut off by the support, the problem of hard shutdown existing when the air conditioner is shut down is solved, the compressor can be completely balanced when the air conditioner is powered off, and the service life of the air conditioner is prolonged.
Example 2
This embodiment provides an integrated liquid cooling air conditioner control system of [ electric ] motor coach, includes:
a judging module: is configured to judge whether the whole vehicle is in a non-charging state and the charging gun is in a gun inserting state;
an air conditioner shutdown module: the system is configured to sequentially control a compressor, a condensing fan and an evaporating fan of the integrated liquid cooling air conditioner to be closed within a set time of N seconds if the whole vehicle is in a non-charging state and a charging gun is in a gun plugging state, and the liquid cooling air conditioner is shut down when integration is completed, otherwise, the integrated liquid cooling air conditioner is controlled to continue to work;
a power-off module: after the integrated liquid cooling air conditioner is shut down, the power supply to the air conditioner panel is cut off, the power supply of the DCDC and the water pump is cut off, and the auxiliary contactor in the high-voltage box is cut off in sequence.
Example 3
The embodiment provides an electric motor coach provided with the integrated liquid cooling air conditioner control system of the electric motor coach in the embodiment 2, and the control system works according to the method in the embodiment 1.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (10)
1. The control method for the integrated liquid cooling air conditioner of the electric motor coach is characterized by comprising the following steps of:
judging whether the whole vehicle is in a non-charging state and the charging gun is in a gun inserting state;
if the whole vehicle is in a non-charging state and the charging gun is in a gun plugging state, the compressor, the condensing fan and the evaporating fan of the integrated liquid cooling air conditioner are sequentially controlled to be closed within a set time, the liquid cooling air conditioner is shut down when integration is completed, and otherwise, the integrated liquid cooling air conditioner is controlled to continue to work;
after the integrated liquid cooling air conditioner is shut down, a power-off instruction is sent out, power supply to the air conditioner panel is cut off, power supply of the DCDC and the water pump is cut off, and then the auxiliary contactor in the high-voltage box is cut off.
2. The method as claimed in claim 1, wherein the set time is 4-6 seconds.
3. The method as claimed in claim 1, wherein after the entire vehicle is determined to be in the non-charging state and the charging gun is in the gun-plugging state, a power-off command is issued at a set time nth second if the air conditioner is determined to be turned off and the bus current of the air conditioner is less than a set value, and a power-off command is forcibly issued at a set time nth +1 second if the air conditioner is determined not to be turned off or the bus current of the air conditioner is not less than the set value.
4. The method as claimed in claim 3, wherein the set value is 5A-7A.
5. The method for controlling the integrated liquid-cooled air conditioner of the electric motor coach as claimed in claim 1, further comprising the steps of:
after receiving a parking charging state instruction sent by a BMS system when starting charging, controlling an auxiliary contactor in a high-voltage box of a power battery to be closed;
receiving an integrated liquid cooling demand instruction sent by a BMS system;
and controlling the DCDC in the integrated power supply to be closed, so that the integrated liquid cooling air conditioner is powered on, and then controlling the water pump to work.
6. The method as claimed in claim 5, wherein the DCDC temperature value is received in real time, and when the DCDC temperature value reaches the fan operating temperature value, the fan is controlled to operate.
7. The method as claimed in claim 5, wherein the step of determining whether the BMS system requires liquid cooling is started after receiving the command for the auxiliary contactor of the high voltage box to be closed transmitted from the BMS system.
8. The method as claimed in claim 5, wherein if a command for stopping the electric motor coach without charging is received from the BMS system, the command for opening the auxiliary contactor in the high-voltage box of the power battery is issued.
9. The utility model provides an integrated liquid cooling air conditioner control system of [ electric ] motor coach, its characterized in that includes:
a judging module: is configured to judge whether the whole vehicle is in a non-charging state and the charging gun is in a gun inserting state;
an air conditioner shutdown module: the system is configured to sequentially control a compressor, a condensing fan and an evaporating fan of the integrated liquid cooling air conditioner to be closed within a set time of N seconds if the whole vehicle is in a non-charging state and a charging gun is in a gun plugging state, and the liquid cooling air conditioner is shut down when integration is completed, otherwise, the integrated liquid cooling air conditioner is controlled to continue to work;
a power-off module: after the integrated liquid cooling air conditioner is shut down, the power supply to the air conditioner panel is cut off, the power supply of the DCDC and the water pump is cut off, and the auxiliary contactor in the high-voltage box is cut off in sequence.
10. An electric motor coach, characterized in that, the integrated liquid cooling air conditioner control system of the electric motor coach as claimed in claim 9 is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210092508.3A CN114407608B (en) | 2022-01-26 | 2022-01-26 | Electric motor coach integrated liquid cooling air conditioner control method and system and electric motor coach |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210092508.3A CN114407608B (en) | 2022-01-26 | 2022-01-26 | Electric motor coach integrated liquid cooling air conditioner control method and system and electric motor coach |
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| CN114407608A true CN114407608A (en) | 2022-04-29 |
| CN114407608B CN114407608B (en) | 2023-06-13 |
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| CN114407608B (en) | 2023-06-13 |
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