CN114407608B - 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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- CN114407608B CN114407608B CN202210092508.3A CN202210092508A CN114407608B CN 114407608 B CN114407608 B CN 114407608B CN 202210092508 A CN202210092508 A CN 202210092508A CN 114407608 B CN114407608 B CN 114407608B
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- air conditioner
- liquid cooling
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- 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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- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to a control method and a system for an integrated liquid cooling air conditioner of an electric motor coach and the electric motor coach, which comprise 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 inserting state, the compressor, the condensing fan and the evaporating fan of the integrated liquid cooling air conditioner are sequentially controlled to be closed within the set time N seconds, the shutdown of the liquid cooling air conditioner during 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, the power supply of the air conditioner panel is cut off, the power supply of the DCDC and the water pump is cut off, and then the auxiliary contactor in the high-pressure box is cut off.
Description
Technical Field
The invention relates to the technical field of electric buses, in particular to an electric bus integrated liquid cooling air conditioner control method and system and an electric bus.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
At present, the transformation from the fuel bus to the pure electric bus is basically completed in each city. Some cities also make a fuel car elimination schedule, and gradually eliminate the fuel car in stages, so that the pure electric operation of the cities is realized. The service life of the power battery becomes the most concerned problem of users, so that the power battery of the liquid cooling system starts to be promoted comprehensively in the market, the service life of the power battery can be prolonged by more than three years by adopting the liquid cooling system for the same battery attenuation, and the protection of the whole life cycle of the power battery of the bus is basically completed, wherein the integrated liquid cooling system with the electric air conditioner is promoted comprehensively in the market due to low cost and good stability. In the charging process, the power battery generates a large amount of heat, the liquid cooling system is required to cool down, the temperature of each single body of the power battery is kept constant, and the inventor finds that the hard cutting-off problem exists when the liquid cooling part of the integrated liquid cooling air conditioner is closed at present, the power supply of the air conditioner is directly cut off after the charging is finished, and the compressor of the electric air conditioner is not completely balanced, so that the service life of the air conditioning system is influenced.
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 cutting off existing in the opening and closing of a liquid cooling part of the integrated liquid cooling air conditioner.
In order to achieve the above purpose, the invention adopts the following technical scheme
In a first aspect, an embodiment of the present invention provides a control method for an integrated liquid-cooled air conditioner of an electric bus, 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 inserting state, sequentially controlling the compressor, the condensing fan and the evaporating fan of the integrated liquid cooling air conditioner to be closed within a set time, and completing shutdown of the liquid cooling air conditioner during integration, otherwise, controlling the integrated liquid cooling air conditioner to continuously work;
after the integrated liquid cooling air conditioner is shut down, a power-off instruction is sent out, the power supply of the air conditioning panel is cut off, the DCDC and the power supply of the water pump are 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 whole vehicle is judged to be in a non-charging state and the charging gun is judged to be in a gun inserting state, if the air conditioner is shut down and the bus current of the air conditioner is smaller than a set value in the nth second of the set time, the power-off operation is executed, and if the air conditioner is not shut down or the bus current of the air conditioner is not smaller than the set value in the nth second of the set time, the power-off operation is forcedly executed in the (n+1) th second.
Optionally, the set value is 5A-7A.
Optionally, the electric bus integrated liquid cooling air conditioner control method further comprises the following steps:
after receiving a parking charging state instruction sent by the BMS system when starting charging, controlling an auxiliary contactor in a high-voltage box of the power battery to be closed;
receiving an integrated liquid cooling demand instruction sent by a BMS system;
and controlling 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 working temperature value, the fan is controlled to work.
Optionally, after receiving the closed state instruction of the auxiliary contactor of the high-voltage box transmitted by the BMS system, the BMS system starts to judge whether the BMS system has a liquid cooling requirement.
Alternatively, if a parking non-charge state command sent by the BMS system is received, a command to open the auxiliary contactor in the high-voltage box of the power battery is sent.
In a second aspect, an embodiment of the present invention provides an integrated liquid-cooled air conditioner control system for an electric bus, including:
and a judging module: the charging gun 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 integrated liquid cooling air conditioner is configured to sequentially close a compressor, a condensing fan and an evaporating fan of the integrated liquid cooling air conditioner within a set time N seconds if the whole vehicle is in a non-charging state and the charging gun is in a gun inserting state, and shut down of the liquid cooling air conditioner during integration is completed, otherwise, the integrated liquid cooling air conditioner continues to work;
and a power-off module: after the integrated liquid cooling air conditioner is shut down, the power supply to the air conditioner panel, the power supply of the DCDC and the water pump and the auxiliary contactor in the high-pressure box are cut off in sequence.
In a third aspect, an embodiment of the present invention provides an electric motor coach, 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 turned off within the set time of N seconds, after the power supply to the air conditioner is cut off, the soft power off is realized, compared with the traditional method that the support cuts off the power supply to the air conditioner after the charging is finished, the hard cutting-off problem existing when the air conditioner is shut down is solved, the air conditioner can be completely balanced when the power is off, and the service life of the air conditioner is prolonged.
2. According to the control method disclosed by the invention, the ATS fan is started to work according to the temperature of the DCDC, the ATS control is optimized in stages, and the control strategy of energy conservation is realized according to the actual requirements of the integrated power supply and the staged work of the water pump and the fan.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and 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 do not limit the application.
FIG. 1 is a diagram showing the operation control components of an integrated liquid-cooled air conditioning system according to embodiment 1 of the present invention;
FIG. 2 is a diagram of the cooling energy supply of the integrated liquid cooling air conditioner according to embodiment 1 of the present invention;
FIG. 3 is a flowchart of the control method of embodiment 1 of the present invention;
Detailed Description
Example 1
The embodiment provides a control method of a liquid cooling air conditioner of 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 whole vehicle controller, the whole vehicle controller controls the work of the integrated liquid cooling air conditioner and the whole vehicle controller, the whole vehicle controller is connected with an integrated power supply containing DCDC, the work of the integrated power supply can be controlled, the whole vehicle controller is also connected with a BMS system and an ATS heat dissipation system, the work of the integrated power supply 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 heat dissipation system and the whole vehicle controller.
The BMS system is used for sending actual liquid cooling requirements of the battery and waking up the whole vehicle controller and the integrated power supply.
The power battery output reaches the integrated power supply through the unified 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 starting the vehicle parking plug-in charging gun, judging signals sent by the BMS by the whole vehicle controller, and judging whether the vehicle is in a parking charging state or not.
When the vehicle controller judges that the vehicle is in a parking charge state, an instruction for closing the auxiliary contactor in the power battery box is sent out, the auxiliary contactor in the power battery box is controlled to be closed, after the auxiliary contactor is closed, the vehicle controller receives an auxiliary contactor state instruction sent out by the BMS system, and the BMS system returns the auxiliary contactor state of the high-voltage box to the vehicle controller through a message. When the whole vehicle controller cannot receive the instruction of the closed state of the auxiliary contactor, judging whether the BMS system has faults or not, and if so, installing a corresponding fault mechanism for processing the faults.
And the whole vehicle controller judges the closing state of the auxiliary contactor in the high-voltage box according to the message of the state of the auxiliary contactor sent by the BMS system, and judges whether the BMS system has liquid cooling requirements when judging that the auxiliary contactor is in the closing state.
When the whole vehicle controller receives that the BMS system does not have the liquid cooling requirement, the next judgment is carried out, and the judgment is continued until an instruction that the BMS system has the liquid cooling requirement is received.
When the whole vehicle controller receives an instruction that the BMS system has liquid cooling demands, a power supply instruction is sent, and firstly the whole vehicle controller sends a DCDC closing instruction in the integrated power supply, so that the DCDC of the integrated power supply is closed, the air conditioning panel and other control systems of the integrated liquid cooling air conditioner are powered on, the air conditioning system works normally, then the normal controller controls the water pump to work, the water pump in the embodiment is an ATS water pump, the ATS water pump works, the DCDC of the integrated power supply is cooled, and the DCDC temperature of the integrated power supply is guaranteed to be normal.
In the charging process, the whole vehicle controller receives the collected DCDC temperature value in real time, when the DCDC temperature value reaches the ATS fan working temperature value, the whole vehicle controller generates a command to control the ATS fan to work, otherwise, the whole vehicle controller 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 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 ATS control in stages, and operate in stages according to the actual requirements of the integrated power supply according to the water pump and fan, thereby implementing an energy-saving control strategy.
When charging is complete, charging completion is displayed at the charger and confirmation is made at the charger.
Judging whether the whole vehicle is in a non-charging state and the charging gun is in a gun inserting state, when the whole vehicle controller receives the command that the whole vehicle is in the non-charging state and the charging gun is in the gun inserting state, sending a shutdown command, and sequentially controlling the compressor, the condensing fan and the evaporating fan of the integrated liquid cooling air conditioner to be turned off within a set time of N seconds to finish shutdown of the liquid cooling air conditioner during integration.
The set time N seconds is 4-6s, and in this embodiment the set time is 5 seconds.
When the whole vehicle controller receives an instruction that the whole vehicle is still in a charging state and is sent by the BMS system, the whole vehicle controller controls the integrated liquid cooling air conditioner to continue to work normally.
When the whole vehicle controller receives a command of the non-charging state sent by the BMS and the charging gun is in the gun inserting state, the whole vehicle controller judges whether the air conditioner is shut down or not and the bus current of the air conditioner is smaller than a set value.
The set value is 5A-7A, and in this embodiment is 6A.
When the whole vehicle controller judges that the air conditioner is shut down and the current of the air conditioner power supply bus is less than 6A in the 5 th second, the whole vehicle controller sends a power-off instruction to execute action one: cutting off power supply to the air conditioner panel and performing second operation: and (3) switching off the power supply of the DCDC and the water pump and then executing action III: and cutting off the auxiliary contactor in the high-voltage box.
When the whole vehicle controller judges that the air conditioner is not in a shutdown state or the current of the air conditioner power supply bus 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 second operation: and (3) switching off the power supply of the DCDC and the water pump and then executing action III: 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 of the embodiment, when the air conditioner is shut down, the compressor, the condensing fan and the evaporating fan are sequentially turned off within 5 seconds of a set time, after the shutdown is completed, the power supply to the air conditioner is cut off, so that soft shutdown is realized, compared with the traditional method that the support cuts off the power supply to the air conditioner after the charging is completed, the hard shutdown problem existing when the air conditioner is shut down is solved, the air conditioner can be completely balanced when the power is off, and the service life of the air conditioner is prolonged.
Example 2
The embodiment provides an integrated liquid cooling air conditioner control system of [ electric ] motor coach, includes:
and a judging module: the charging gun 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 integrated liquid cooling air conditioner is configured to sequentially control the compressor, the condensing fan and the evaporating fan of the integrated liquid cooling air conditioner to be closed within a set time N seconds if the whole vehicle is in a non-charging state and the charging gun is in a gun inserting state, and to finish shutdown of the liquid cooling air conditioner during integration, otherwise, control the integrated liquid cooling air conditioner to continue working;
and a power-off module: after the integrated liquid cooling air conditioner is shut down, the power supply to the air conditioner panel, the power supply of the DCDC and the water pump and the auxiliary contactor in the high-pressure box are cut off in sequence.
Example 3
The embodiment provides an electric motor coach, wherein the electric motor coach integrated liquid cooling air conditioner control system of the embodiment 2 is installed, and the control system works according to the method of the embodiment 1.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.
Claims (7)
1. The electric bus integrated liquid cooling air conditioner control method is characterized by comprising the following steps of:
after the charging is completed, displaying the completion of the charging at the charger and confirming the completion of the charging at the charger;
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 inserting state, sequentially controlling the compressor, the condensing fan and the evaporating fan of the integrated liquid cooling air conditioner to be closed within a set time to finish the shutdown of the integrated liquid cooling air conditioner, otherwise, controlling the integrated liquid cooling air conditioner to continuously work, wherein the set time is 4-6 seconds;
after the whole vehicle is judged to be in a non-charging state and the charging gun is judged to be in a gun inserting state, if the air conditioner is judged to be shut down and the bus current of the air conditioner is smaller than a set value in the Nth second of the set time, after the integrated liquid cooling air conditioner is shut down, a power-off instruction is sent out, the power supply of an air conditioner panel is cut off, the power supply of a DCDC and a water pump is cut off, then an auxiliary contactor in a high-voltage box is cut off, and if the air conditioner is judged not to be shut down or the bus current of the air conditioner is not smaller than the set value in the Nth second of the set time, the power-off instruction is forcedly sent out in the (n+1) th second, wherein the set value is 5A-7A.
2. The method for controlling the integrated liquid-cooled air conditioner of the electric motor coach as claimed in claim 1, wherein the method for controlling the integrated liquid-cooled air conditioner of the electric motor coach further comprises the following steps:
after receiving a parking charging state instruction sent by the BMS system when starting charging, controlling an auxiliary contactor in a high-voltage box of the power battery to be closed;
receiving an integrated liquid cooling demand instruction sent by a BMS system;
and controlling 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.
3. The method for controlling an integrated liquid-cooled air conditioner of an electric bus according to claim 2, wherein the temperature value of the DCDC is received in real time, and the fan is controlled to operate when the temperature value of the DCDC reaches the operating temperature value of the fan.
4. The method for controlling the integrated liquid cooling air conditioner of the electric motor coach as claimed in claim 2, wherein the method for controlling the integrated liquid cooling air conditioner of the electric motor coach is characterized in that after receiving the command of the closing 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 requirement exists.
5. The method for controlling an integrated liquid-cooled air conditioner of an electric bus according to claim 2, wherein if a parking non-charge state command sent by the BMS system is received, a command for opening an auxiliary contactor in a high-voltage box of the power battery is sent.
6. An integrated liquid cooling air conditioner control system of [ electric ] motor coach, characterized by comprising:
and a judging module: the charging gun is configured to display that charging is completed in the charger and confirm that charging is completed in the charger after charging is completed, and 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 integrated liquid cooling air conditioner is configured to sequentially control the compressor, the condensing fan and the evaporating fan of the integrated liquid cooling air conditioner to be closed within a set time if the whole vehicle is in a non-charging state and the charging gun is in a gun inserting state, and finish the shutdown of the integrated liquid cooling air conditioner, otherwise, control the integrated liquid cooling air conditioner to continuously work, wherein the set time is 4-6 seconds;
and a power-off module: after the whole vehicle is judged to be in a non-charging state and the charging gun is in a gun inserting state, if the air conditioner is judged to be shut down and the bus current of the air conditioner is smaller than a set value in the Nth second of the set time, after the integrated liquid cooling air conditioner is shut down, a power-off instruction is sent out, the power supply of an air conditioner panel is cut off, the power supply of a DCDC and a water pump is cut off, then an auxiliary contactor in a high-voltage box is cut off, and if the air conditioner is judged not to be shut down or the bus current of the air conditioner is not smaller than the set value in the Nth second of the set time, the power-off instruction is forcedly sent out in the (N+1) th second, wherein the set value is 5A-7A.
7. An electric motor coach, characterized in that the electric motor coach integrated liquid cooling air conditioner control system is provided.
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| 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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| Application Number | Priority Date | Filing Date | Title |
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| 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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| CN114407608B true CN114407608B (en) | 2023-06-13 |
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| CN114407608A (en) | 2022-04-29 |
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