CN115817104B

CN115817104B - Air conditioner control method and device for new energy commercial vehicle and storage medium

Info

Publication number: CN115817104B
Application number: CN202211445901.2A
Authority: CN
Inventors: 马秋香; 王善超; 覃记荣; 张绪彬; 莫佳虹; 李春晓; 黄国桂; 姚柳成
Original assignee: Dongfeng Liuzhou Motor Co Ltd
Current assignee: Dongfeng Liuzhou Motor Co Ltd
Priority date: 2022-11-18
Filing date: 2022-11-18
Publication date: 2024-06-04
Anticipated expiration: 2042-11-18
Also published as: CN115817104A

Abstract

The invention discloses an air conditioner control method, device and storage medium of a new energy commercial vehicle, wherein the method comprises the following steps: after receiving an air conditioner starting instruction sent by an air conditioner module, if the charging module is in a charging working state, detecting whether the current value of the charging module is not less than a preset threshold value; if yes, the air conditioning relay and the main negative relay are controlled to be closed, so that the charging pile supplies power to the air conditioning module through the closed charging positive relay and the charging negative relay; if the charging module is in a non-working state, the air conditioner relay is controlled to be closed and the main negative relay is controlled to be closed, so that the power battery supplies power for the air conditioner module; in the process that the power battery supplies power for the air conditioning module, when a starting signal of the charging module is detected, the closing state of the air conditioning relay is kept, the charging positive relay and the charging negative relay are controlled to be closed, the charging pile supplies power for the power battery, and meanwhile the charging pile supplies power for the air conditioning module, so that the function of opening an air conditioner under the charging state of the new energy commercial vehicle is achieved.

Description

Air conditioner control method and device for new energy commercial vehicle and storage medium

Technical Field

The invention relates to the technical field of new energy automobiles, in particular to an air conditioner control method, an air conditioner control device and a storage medium of a new energy commercial vehicle.

Background

At present, most of the air conditioners of the new energy commercial vehicles are high-voltage electric air conditioners, and the high-voltage electric air conditioners are powered by a discharging loop of a power battery of the vehicle. In order to ensure the safety of the vehicle in the charged state, the vehicle cannot move through the driving system of the vehicle in the charged state, only the charging loop is kept to be closed, and the power battery power supply loop of the whole vehicle is disconnected, namely the high-voltage load on the whole vehicle cannot work, including an air conditioner. If the high-voltage main loop is closed to supply power to the air conditioner during charging, the main loops such as a driving system and the like have high-voltage electricity, and the risk of driving possibly occurs during charging exists; if the air conditioner is powered through the main loop of the power battery during charging, the power battery is discharged and charged, and the power battery is not easy to fill and has an influence on the performance of the power battery.

At present, a new energy commercial vehicle does not usually use a fixed charging pile of a passenger vehicle, but charges in places such as a discharging area for delivering goods to a logistics park, and in the charging process, a driver needs to start an air conditioner in the vehicle to wait or rest. The inability of the vehicle to turn on the air conditioner in the charged state brings inconvenience to the waiting or resting driver.

Disclosure of Invention

The invention provides an air conditioner control method, an air conditioner control device and a storage medium for a new energy commercial vehicle, which supply power to a power battery through high-voltage electricity of a charging pile and simultaneously supply power to an air conditioner, so that the function of opening the air conditioner in a charging state of the new energy commercial vehicle is realized.

In order to meet the function of opening an air conditioner when a new energy commercial vehicle is charged, and meanwhile, potential safety hazards of charging driving are not generated, the embodiment of the invention provides an air conditioner control method of the new energy commercial vehicle, and the new energy commercial vehicle comprises a power battery module, a charging module and an air conditioner module; the power battery module comprises a power battery; the charging module comprises a charging positive relay and a charging negative relay; the charging module is used for being externally connected with a charging pile, wherein the charging positive relay is connected with the positive electrode of the charging pile, and the charging negative relay is connected with the negative electrode of the charging pile; the air conditioning module comprises an air conditioning relay, a main negative relay and an electric air conditioner;

The positive pole of the charging pile is connected with the positive pole of the power battery through the charging positive relay, and the negative pole of the charging pile is connected with the negative pole of the power battery through the charging negative relay; one end of the electric air conditioner is connected with the positive electrode of the power battery through the air conditioner relay, and is connected with the positive electrode of the charging pile through the air conditioner relay and the charging positive relay; the other end of the electric air conditioner is connected with the negative electrode of the power battery through the main negative relay, and is connected with the negative electrode of the charging pile through the main negative relay and the charging negative relay;

The air conditioner control method comprises the following steps:

after receiving an air conditioner starting instruction sent by the air conditioner module, judging whether the charging module is in a working state or not;

if the charging module is in a working state, detecting whether the current value of the charging module is not smaller than a preset threshold value; if yes, the air conditioning relay and the main negative relay are controlled to be closed, so that the charging pile supplies power to the air conditioning module through the closed charging positive relay, the charging negative relay and the main negative relay; the charging module is in a working state, and the charging positive relay and the charging negative relay are both closed;

If the charging module is in a non-working state, the air conditioning relay and the main negative relay are controlled to be closed so that the power battery supplies power for the air conditioning module; the charging module is in a non-working state, and the charging positive relay and the charging negative relay are disconnected;

In the process that the power battery supplies power for the air conditioning module, when a starting signal of the charging module is detected, the closing state of the air conditioning relay is kept, the charging positive relay and the charging negative relay are controlled to be closed, the charging pile supplies power for the power battery, namely the power battery module is charged reversely in current, and meanwhile the charging pile supplies power for the air conditioning module.

As a preferred scheme, after receiving an air conditioner starting instruction sent by the air conditioner module, if the charging module of the vehicle is in a working state, namely the vehicle is in a charging state, detecting whether charging current is not less than a preset threshold value, if so, closing an air conditioner relay, so that a charging pile is connected with an electric air conditioner through the closed charging positive relay, the charging negative relay, the main negative relay and the air conditioner relay, the charging pile can directly supply power to the electric air conditioner, and the charging pile can supply power to the electric air conditioner while supplying power to a power battery.

If the charging module of the vehicle is in a non-working state, namely the vehicle is in a non-charging state, the air conditioner relay and the main negative relay are directly closed, so that the power battery directly supplies power for the electric air conditioner.

If in the process that the power battery supplies power for the electric air conditioner, when the charging module is started, the air conditioner relay and the main negative relay do not need to be disconnected, and the charging positive relay and the charging negative relay are directly controlled to be closed, so that the vehicle enters a charging state. The charging positive relay and the charging negative relay are closed, so that the charging pile is connected to two ends of the power battery and the electric air conditioner, and simultaneously, the power battery and the electric air conditioner are powered, the charging pile can supply power for the electric air conditioner when supplying power for the power battery, and the power supply of the air conditioner can be seamlessly switched from the power battery to the charging pile without switching off the air conditioner and switching the power supply after the charging module of the vehicle is switched from a non-working state to a working state.

As a preferable scheme, judging whether the charging module is in a working state or not specifically includes:

when the charging pile is detected to be connected to the charging module and the charging pile charges the battery module, judging that the charging module is in a working state; when the charging pile charges the battery module, the current of the power battery module is negative current;

And detecting that the charging pile is not connected to the charging module, and judging that the charging module is in a non-working state.

As a preferable scheme, when the charging pile is detected to be connected to the charging module and the charging pile charges the battery module, the charging module is judged to be in a working state; when the charging pile charges the battery module, the current of the power battery module is negative current; therefore, the charging module in the working state is simultaneously connected with the power battery module and the air conditioning module, and can supply power for the power battery module and the air conditioning module simultaneously, so that the function of opening an air conditioner in the charging state of the new energy commercial vehicle is realized.

Preferably, detecting whether the current value of the charging module is not less than a preset threshold value further includes:

And if the current value of the charging module is smaller than the preset threshold value, controlling the air conditioner relay to keep the off state, and displaying reminding information of weak charging current to the cab.

When the SOC value of the power battery is higher than a certain value, the condition that the current output by the charging pile becomes smaller can occur, and when the current value of the charging module is detected to be smaller than a preset threshold value, the operation of the air conditioner is suspended, so that the condition that the SOC value of the power battery is higher than a certain value, namely the required charging current is small, the full charge can be ensured.

Preferably, after controlling the charging positive relay and the charging negative relay to be both closed, the method further comprises:

Detecting whether the current value of the charging module is not smaller than a preset threshold value;

And if the current value of the charging module is smaller than the preset threshold value, the air conditioner relay is controlled to be disconnected, so that the charging pile is stopped to supply power to the air conditioner module.

When the current value of the charging module is detected to be smaller than a preset threshold value, the operation of the air conditioner is suspended, and the condition that the SOC value of the power battery is higher than a certain value, namely the required charging current is still ensured to be fully charged is ensured.

Preferably, before receiving the air conditioner start instruction sent by the air conditioner module, the method further includes:

When the charging module is detected to be in a working state, the main positive relay of the driving module is controlled to be disconnected, and the main positive relay is kept in a disconnected state until the charging module is detected to be in a non-working state;

The driving module comprises a main positive relay and a motor; the motor is connected with the power battery module through the main positive relay.

As the preferable scheme, when the vehicle is in a charging state, the high-voltage main loop is closed to supply power to the air conditioner, meanwhile, the driving module connected in series with the charging module has high-voltage power, so that the risk of driving possibly occurs during charging is existed, in order to ensure that the vehicle cannot drive through the driving module during charging, the main positive relay in the driving module needs to be controlled to be disconnected, and the main positive relay is kept in a disconnected state, the motor in the driving module is kept disconnected with other modules until the fact that the high-voltage signal on charging is invalid is detected, the driving of the vehicle cannot be performed through the driving module during charging, and the potential safety hazard of charging driving is avoided.

Correspondingly, the invention also provides an air conditioner control device of the new energy commercial vehicle, which comprises a power battery module, a charging module and an air conditioner module; the power battery module comprises a power battery; the charging module comprises a charging positive relay and a charging negative relay; the charging module is used for being externally connected with a charging pile, wherein the charging positive relay is connected with the positive electrode of the charging pile, and the charging negative relay is connected with the negative electrode of the charging pile; the air conditioning module comprises an air conditioning relay, a main negative relay and an electric air conditioner;

The charging pile anode is connected with the power battery anode through a charging positive relay, and the charging pile cathode is connected with the power battery cathode through a charging negative relay; one end of the electric air conditioner is connected with the positive electrode of the power battery through an air conditioner relay, and is connected with the positive electrode of the charging pile through the air conditioner relay and the charging positive relay; the other end of the electric air conditioner is connected with the negative electrode of the power battery through the main negative relay, and is connected with the negative electrode of the charging pile through the main negative relay and the charging negative relay;

The air conditioner control device is applied to the new energy commercial vehicle and comprises: an air conditioning signal receiving module and a control module;

The air conditioner signal receiving module is used for judging whether the charging module is in a working state after receiving an air conditioner starting instruction sent by the air conditioner module;

The control module is used for detecting whether the current value of the charging module is not smaller than a preset threshold value if the charging module is in a working state; if yes, the air conditioning relay and the main negative relay are controlled to be closed, so that the charging pile supplies power to the air conditioning module through the closed charging positive relay, the charging negative relay and the main negative relay; the charging module is in a working state, and the charging positive relay and the charging negative relay are both closed;

If the charging module is in a non-working state, the control module controls the air conditioning relay and the main negative relay to be closed so that the power battery supplies power for the air conditioning module; the charging module is in a non-working state, and the charging positive relay and the charging negative relay are disconnected;

In the process that the power battery supplies power for the air conditioning module, when a starting signal of the charging module is detected, the control module controls the charging positive relay and the charging negative relay to be closed, the charging pile supplies power for the power battery, namely the power battery module is reversely charged with current, and meanwhile, the charging pile supplies power for the air conditioning module.

As a preferred scheme, after the air conditioning signal receiving module receives the air conditioning starting instruction sent by the air conditioning module, if the charging module of the vehicle is in a working state, namely the vehicle is in a charging state, the control module detects whether the charging current is not less than a preset threshold value, if yes, the control module closes the air conditioning relay, so that the charging pile is connected with the electric air conditioner through the closed charging positive relay, the charging negative relay, the main negative relay and the air conditioning relay, the charging pile can directly supply power to the electric air conditioner, and the charging pile can supply power to the electric air conditioner while supplying power to the power battery.

If the charging module of the vehicle is in a non-working state, namely the vehicle is in a non-charging state, the control module directly closes the air conditioner relay and the main negative relay, so that the power battery directly supplies power for the electric air conditioner.

If the charging module is started in the process that the power battery supplies power for the electric air conditioner, the air conditioner relay and the main negative relay do not need to be disconnected, and the control module directly controls the charging positive relay and the charging negative relay to be closed so that the vehicle enters a charging state. The charging positive relay and the charging negative relay are closed, so that the charging pile is connected to two ends of the power battery and the electric air conditioner, and simultaneously, the power battery and the electric air conditioner are powered, the charging pile can supply power for the electric air conditioner when supplying power for the power battery, and the power supply of the air conditioner can be seamlessly switched from the power battery to the charging pile without switching off the air conditioner and switching the power supply after the charging module of the vehicle is switched from a non-working state to a working state.

Preferably, the control module includes: the device comprises a judging unit, a charging control unit and a non-charging control unit;

the judging unit is used for judging whether the charging module is in a working state or not, and specifically comprises the following steps:

When the charging pile is detected to be connected to the charging module and the charging pile charges the battery module, judging that the charging module is in a working state; when the charging pile charges the battery module, the current of the power battery module is negative current; detecting that the charging pile is not connected to a charging module, and judging that the charging module is in a non-working state;

The charging control unit is used for detecting whether the current value of the charging module is not smaller than a preset threshold value if the charging module is in a working state; if yes, the air conditioning relay and the main negative relay are controlled to be closed, so that the charging pile supplies power to the air conditioning module through the closed charging positive relay, the charging negative relay and the main negative relay; if the current value of the charging module is smaller than the preset threshold value, the air conditioner relay is controlled to keep the off state, and reminding information of weak charging current is displayed to the cab; the charging module is in a working state, and the charging positive relay and the charging negative relay are both closed;

The non-charging control unit is used for controlling the air conditioning relay and the main negative relay to be closed if the charging module is in a non-working state so that the power battery supplies power for the air conditioning module; the charging module is in a non-working state, and the charging positive relay and the charging negative relay are disconnected;

In the process that the power battery supplies power for the air conditioning module, when a starting signal of the charging module is detected, the charging positive relay and the charging negative relay are controlled to be closed, the charging pile supplies power for the power battery, namely the power battery module is charged reversely in current, and meanwhile the charging pile supplies power for the air conditioning module.

As a preferred scheme, the judging unit judges whether the charging module is in a working state, if the charging module of the vehicle is in the working state, namely, the vehicle is in the charging state, the control module detects whether the charging current is not less than a preset threshold value, if yes, the control module closes the air conditioner relay so that the charging pile is connected with the electric air conditioner through the closed charging positive relay, the charging negative relay, the main negative relay and the air conditioner relay, the charging pile can directly supply power for the electric air conditioner, and the charging pile can supply power for the electric air conditioner when supplying power for the power battery.

If the charging module of the vehicle is in a non-working state, namely the vehicle is in a non-charging state, and the charging pile is not connected to the charging module, the control module directly closes the air conditioner relay so that the power battery directly supplies power for the electric air conditioner.

As a preferred solution, the air conditioner control device of the new energy commercial vehicle further includes: a drive control module;

The driving control module is used for controlling the main positive relay of the driving module to be disconnected when the charging module is detected to be in a working state, and keeping the main positive relay in the disconnected state until the charging module is detected to be in a non-working state;

When the vehicle is in a charging state, the main high-voltage loop is closed to supply power to the air conditioner, meanwhile, the driving module connected in series with the charging module has high-voltage power, so that the risk of driving possibly occurs during charging is existed, in order to ensure that the vehicle cannot drive the vehicle through the driving module during charging, the driving control module needs to control the main positive relay in the driving module to be disconnected when detecting that the charging module is in a working state, and keeps the main positive relay in the disconnected state, the motor in the driving module is kept disconnected with other modules until the fact that the high-voltage signal is invalid during charging is detected, the vehicle cannot drive the vehicle through the driving module during charging is ensured, and potential safety hazards of charging and driving are not generated.

Accordingly, the present invention also provides a computer-readable storage medium including a stored computer program; the computer program controls the equipment where the computer readable storage medium is located to execute the air conditioner control method of the new energy commercial vehicle according to the content of the invention when running.

Drawings

FIG. 1 is a schematic flow chart of an embodiment of an air conditioning control method for a new energy commercial vehicle provided by the present invention;

FIG. 2 is a circuit diagram of another embodiment of an air conditioning control method for a new energy commercial vehicle provided by the present invention;

Fig. 3 is a schematic structural view of an embodiment of an air conditioner control device for a new energy commercial vehicle according to the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Example 1

Referring to fig. 1, in an embodiment of the present invention, an air conditioner control method for a new energy commercial vehicle includes a power battery module, a charging module and an air conditioner module; the power battery module comprises a power battery; the charging module comprises a charging positive relay and a charging negative relay; the charging module is used for being externally connected with a charging pile, wherein the charging positive relay is connected with the positive electrode of the charging pile, and the charging negative relay is connected with the negative electrode of the charging pile; the air conditioning module comprises an air conditioning relay, a main negative relay and an electric air conditioner;

The air conditioner control method comprises the steps of S101-S104:

step S101: and after receiving an air conditioner starting instruction sent by the air conditioner module, judging whether the charging module is in a working state.

In this embodiment, whether the charging module is in a working state is determined specifically as follows:

In the embodiment, after detecting that the charging pile is connected to the charging module, the whole vehicle controller detects charging connection signals of a fast charging gun and a slow charging gun of the charging pile; when the charging connection signal CC2 signal of the fast charging gun is effective and the charging connection signal CC signal sent by the slow charging gun is ineffective, the charging pile charges the battery module, and the current of the power battery module is negative current.

In the present embodiment, the vehicle needs to be kept in a stopped state while the vehicle is charged. When the whole vehicle controller detects that the charging pile is connected to the charging module, the whole vehicle controller detects whether the gear is an N-gear signal and whether the hand brake is a pull-up signal, and after the whole vehicle controller detects the N-gear signal and the pull-up signal, the charging module is started to close the charging negative relay and the charging positive relay so as to connect the charging pile to two ends of the power battery.

In this embodiment, the air conditioning module further includes a PTC heater; the PTC heater is connected in parallel at two ends of the electric air conditioner;

One end of the electric air conditioner and one end of the PTC heater are connected with the positive electrode of the power battery through the air conditioner relay at the same time, and are connected with the positive electrode of the charging pile through the air conditioner relay and the charging positive relay; the other end of the electric air conditioner and the other end of the PTC heater are connected with the negative electrode of the power battery through the main negative relay at the same time, and are connected with the negative electrode of the charging pile through the main negative relay and the charging negative relay;

The new energy commercial vehicle further comprises a conversion power supply module, wherein the conversion power supply module comprises an auxiliary driving relay, a DC-DC power supply, a storage battery, an oil pump controller, an oil pump, an air pump controller and an air pump.

One end of the DC-DC power supply is connected with the positive electrode of the power battery through the auxiliary driving relay, and is connected with the positive electrode of the charging pile through the auxiliary driving relay and the charging positive relay, and is connected with the oil pump controller and the air pump controller; the other end of the DC-DC power supply is connected with the negative electrode of the power battery through a main negative relay, and is connected with the negative electrode of the charging pile through the main negative relay and a charging negative relay;

one end of the oil pump controller and one end of the air pump controller are connected with the anode of the charging pile through the auxiliary driving relay and the charging anode relay at the same time, and are connected with the anode of the power battery through the auxiliary driving relay; the other end of the oil pump controller is connected with an oil pump, and the other end of the air pump controller is connected with an air pump.

If the charging module is in a working state, the charging pile is connected to two ends of the DC-DC power supply through the closed charging positive relay, the closed charging negative relay, the closed main negative relay and the closed auxiliary driving relay, the charging pile provides a high-voltage power supply for the DC-DC power supply, and the charging pile provides a high-voltage power supply for the DC-DC power supply while supplying power for the power battery; the DC-DC power supply converts the high-voltage power supplied by the charging pile into a low-voltage power supply, supplies the low-voltage power to the oil pump through the oil pump controller, and supplies the low-voltage power to the air pump through the air pump controller.

If the charging module is in a non-working state, the power battery is connected to two ends of the DC-DC power supply through the closed main negative relay and the closed auxiliary driving relay, the power battery provides a high-voltage power supply for the DC-DC power supply, the DC-DC power supply converts the high-voltage power provided by the power battery into a low-voltage power supply, the low-voltage power supply is supplied to the oil pump through the oil pump controller, and the low-voltage power supply is supplied to the air pump through the air pump controller.

Step S102: if the charging module is in a working state, detecting whether the current value of the charging module is not smaller than a preset threshold value; if yes, the air conditioning relay and the main negative relay are controlled to be closed, so that the charging pile supplies power to the air conditioning module through the closed charging positive relay, the charging negative relay and the main negative relay; the charging module is in a working state, and the charging positive relay and the charging negative relay are both closed.

In this embodiment, detecting whether the current value of the charging module is not less than a preset threshold value further includes:

In this embodiment, when the charging pile charges the power battery, when the SOC value of the power battery is higher than a certain value, the situation that the current output by the charging pile becomes smaller occurs, and when it is detected whether the current value of the charging module is not smaller than a preset threshold value, the air conditioner is not started to operate, the charging pile continues to charge the power battery until the power battery is fully charged, so that the charging pile can ensure that the power battery is fully charged when the SOC value of the power battery is higher than the certain value, that is, the required charging current is still ensured to be fully charged when the required charging current is small.

In this embodiment, before the air conditioner relay and the main negative relay are controlled to be closed, the method further includes:

The vehicle controller detects whether the key signal is an ON gear signal or not, detects whether the switching signal of the PTC heater of the air conditioner module is invalid, and controls the air conditioner relay and the main negative relay to be closed to enable the air conditioner compressor and the condenser fan to work when detecting that the key signal is the ON gear signal and the switching signal of the PTC heater of the air conditioner module is invalid.

Step S103: if the charging module is in a non-working state, the air conditioning relay and the main negative relay are controlled to be closed so that the power battery supplies power for the air conditioning module; the charging module is in a non-working state, and the charging positive relay and the charging negative relay are disconnected.

Step S104: in the process that the power battery supplies power for the air conditioning module, when a starting signal of the charging module is detected, the closing state of the air conditioning relay is kept, the charging positive relay and the charging negative relay are controlled to be closed, the charging pile supplies power for the power battery, namely the power battery module is charged reversely in current, and meanwhile the charging pile supplies power for the air conditioning module.

In this embodiment, after controlling the charging positive relay and the charging negative relay to be both closed, the method further includes:

In this embodiment, when the charging pile charges the power battery, when the SOC value of the power battery is higher than a certain value, the condition that the current output by the charging pile becomes smaller occurs, and when detecting whether the current value of the charging module is not smaller than a preset threshold value, the operation of the air conditioner is suspended, the charging pile continues to charge the power battery until the power battery is fully charged, so that the charging pile can ensure that the power battery is fully charged when the SOC value of the power battery is higher than a certain value, that is, the required charging current is still ensured to be fully charged when the required charging current is small.

In this embodiment, before receiving the air conditioner start instruction sent by the air conditioner module, the method further includes:

In order to better explain the embodiment, the following provides a specific implementation flow of an air conditioner control method of a new energy commercial vehicle:

referring to fig. 2, in a circuit diagram of the present embodiment, arrows indicate the trend of partial current when the air conditioner is turned on in the vehicle charging state, and the circuit diagram specifically includes:

the charging positive relay is connected with the positive pole of the charging pile, and the charging negative relay is connected with the negative pole of the charging pile;

The positive pole of the charging pile is connected with the positive pole of the power battery through the charging positive relay, and the negative pole of the charging pile is connected with the negative pole of the power battery through the charging negative relay;

One end of the TM controller is connected with the anode of the charging pile through a main positive relay and a charging positive relay, and is connected with the anode of the power battery through the main positive relay; the other end of the TM controller is connected with the motor.

One end of the electric air conditioner and one end of the PTC heater are connected with the positive electrode of the power battery through the air conditioner relay at the same time, and are connected with the positive electrode of the charging pile through the air conditioner relay and the charging positive relay; the other end of the electric air conditioner and the other end of the PTC heater are connected with the negative electrode of the power battery through the main negative relay at the same time, and are connected with the negative electrode of the charging pile through the main negative relay and the charging negative relay.

Detecting that a charging pile is connected into a circuit, and controlling a charging positive relay and a charging negative relay to be closed by a whole vehicle controller, wherein the charging pile charges a power battery, and the current of a power battery module is negative current;

when the charging pile is detected to charge the power battery, the main positive relay is controlled to be disconnected, and the main positive relay is kept in a disconnected state until the charging pile is detected to be disconnected and the circuit is connected; the vehicle can not be started to drive by the motor when the vehicle is charged, and the potential safety hazard of charging driving is avoided.

And after receiving an air conditioner starting instruction sent by the electric air conditioner, judging whether the charging pile is in a state of charging the power battery.

If the charging pile is detected to charge the power battery, detecting whether the power supply current value of the charging pile is not smaller than a preset threshold value;

If the power supply current value of the charging pile is not less than a preset threshold value, and the whole vehicle controller detects that the key signal is an ON gear signal, when the switch signal of the PTC heater of the air conditioner module is invalid, the air conditioner relay and the main negative relay are controlled to be closed, so that the charging pile supplies power to the air conditioner module through the closed charging positive relay, the charging negative relay and the main negative relay, and the air conditioner compressor and the condenser fan work.

If the charging pile is detected to charge the power battery, the main negative relay and the auxiliary driving relay are controlled to be closed, the charging pile is connected to two ends of the DC-DC power supply through the closed charging positive relay, the closed charging negative relay, the closed main negative relay and the closed auxiliary driving relay, the charging pile provides a high-voltage power supply for the DC-DC power supply, and the charging pile provides a high-voltage power supply for the DC-DC power supply when supplying power for the power battery; the DC-DC power supply converts the high-voltage power supplied by the charging pile into a low-voltage power supply, supplies the low-voltage power to the oil pump through the oil pump controller, and supplies the low-voltage power to the air pump through the air pump controller.

If an air conditioner starting instruction sent by the air conditioner module is received, and when the charging pile is detected to be disconnected with the circuit, the air conditioner relay and the main negative relay are controlled to be closed, so that the power battery supplies power for the air conditioner module; when the charging pile is disconnected with the circuit, the charging positive relay and the charging negative relay are disconnected;

If the charging pile is disconnected with the circuit, the power battery is connected to two ends of the DC-DC power supply through the closed main negative relay and the closed auxiliary driving relay, the power battery provides a high-voltage power supply for the DC-DC power supply, the DC-DC power supply converts the high-voltage power provided by the power battery into a low-voltage power supply, the low-voltage power supply is supplied to the oil pump through the oil pump controller, and the low-voltage power supply is supplied to the air pump through the air pump controller.

In the process that the power battery supplies power for the electric air conditioning module, when the charging pile is detected to be connected with the circuit, the closing state of the air conditioning relay and the main negative relay is kept, the charging positive relay and the charging negative relay are controlled to be closed, so that the current of the power battery module is reversed, the charging pile supplies power for the power battery, and meanwhile, the charging pile supplies power for the air conditioning module.

The implementation of the embodiment of the invention has the following effects:

According to the air conditioner control method for the new energy commercial vehicle, after the air conditioner starting instruction sent by the air conditioner module is received, if the charging module of the vehicle is in a working state, namely the vehicle is in a charging state, whether the charging current is not smaller than a preset threshold value is detected, if yes, the air conditioner relay is closed, so that the charging pile is connected with the electric air conditioner through the closed charging positive relay, the charging negative relay, the main negative relay and the air conditioner relay, the charging pile can directly supply power for the electric air conditioner, and the electric air conditioner can be supplied with power when the charging pile supplies power for the power battery.

Example two

Referring to fig. 3, in order to provide an air conditioner control device for a new energy commercial vehicle according to an embodiment of the present invention,

The air conditioner control device is applied to the new energy commercial vehicle and comprises: an air conditioning signal receiving module 201 and a control module 202;

the air conditioning signal receiving module 201 is configured to determine whether the charging module is in a working state after receiving an air conditioning start instruction sent by the air conditioning module;

the control module 202 is configured to detect whether a current value of the charging module is not less than a preset threshold value if the charging module is in a working state; if yes, the air conditioning relay and the main negative relay are controlled to be closed, so that the charging pile supplies power to the air conditioning module through the closed charging positive relay, the charging negative relay and the main negative relay; the charging module is in a working state, and the charging positive relay and the charging negative relay are both closed;

If the charging module is in a non-working state, the control module 202 controls the air conditioning relay and the main negative relay to be closed so that the power battery supplies power for the air conditioning module; the charging module is in a non-working state, and the charging positive relay and the charging negative relay are disconnected;

In the process that the power battery supplies power to the air conditioning module, when a starting signal of the charging module is detected, the control module 202 controls the charging positive relay and the charging negative relay to be closed, the charging pile supplies power to the power battery, namely, the power battery module is reversely charged with current, and meanwhile, the charging pile supplies power to the air conditioning module.

The control module 202 includes: the device comprises a judging unit, a charging control unit and a non-charging control unit;

The air conditioner control device further includes: a drive control module;

The air conditioner control device of the new energy commercial vehicle can implement the air conditioner control method of the new energy commercial vehicle. The options in the method embodiments described above are also applicable to this embodiment and will not be described in detail here. The rest of the embodiments of the present application may refer to the content of the above method embodiments, and in this embodiment, no further description is given.

According to the air conditioner control device for the new energy commercial vehicle, after the air conditioner signal receiving module receives the air conditioner starting instruction sent by the air conditioner module, if the charging module of the vehicle is in a working state, namely the vehicle is in a charging state, the control module detects whether the charging current is not smaller than a preset threshold value, if so, the air conditioner relay is closed by the control module, so that the charging pile is connected with the electric air conditioner through the closed charging positive relay, the charging negative relay, the air conditioner relay and the main negative relay, the charging pile can directly supply power to the electric air conditioner, and the charging pile can supply power to the electric air conditioner while supplying power to the power battery.

Example III

Correspondingly, the invention further provides a computer readable storage medium, which comprises a stored computer program, wherein the equipment where the computer readable storage medium is located is controlled to execute the air conditioner control method of the new energy commercial vehicle according to any one of the embodiments.

The computer program may be divided into one or more modules/units, which are stored in the memory and executed by the processor to accomplish the present invention, for example. The one or more modules/units may be a series of computer program instruction segments capable of performing the specified functions, which instruction segments are used for describing the execution of the computer program in the terminal device.

The terminal equipment can be computing equipment such as a desktop computer, a notebook computer, a palm computer, a cloud server and the like. The terminal device may include, but is not limited to, a processor, a memory.

The Processor may be a central processing unit (Centra l Process i ng Unit, CPU), or other general purpose Processor, digital signal Processor (DIGITA L SIGNA L Processor, DSP), application specific integrated circuit (APP L ICAT I on SPECI FIC I NTEGRATED CI rcuit, asic), field programmable gate array (Fie l d-Programmab L E GATE ARRAY, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, which is a control center of the terminal device, and which connects various parts of the entire terminal device using various interfaces and lines.

The memory may be used to store the computer program and/or the module, and the processor may implement various functions of the terminal device by running or executing the computer program and/or the module stored in the memory and invoking data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data created according to the use of the mobile terminal, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart memory card (SMART MED IA CARD, SMC), secure digital (Secure Digita l, SD) card, flash memory card (F L ASH CARD), at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.

Wherein the terminal device integrated modules/units may be stored in a computer readable storage medium if implemented in the form of software functional units and sold or used as stand alone products. Based on such understanding, the present invention may implement all or part of the flow of the method of the above embodiment, or may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-On-y Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth.

The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present invention, and are not to be construed as limiting the scope of the invention. It should be noted that any modifications, equivalent substitutions, improvements, etc. made by those skilled in the art without departing from the spirit and principles of the present invention are intended to be included in the scope of the present invention.

Claims

1. The air conditioner control method of the new energy commercial vehicle is characterized in that the new energy commercial vehicle comprises a power battery module, a charging module, an air conditioner module and a conversion power supply module; the switching power supply module comprises an auxiliary driving relay, a DC-DC power supply, a storage battery, an oil pump controller, an oil pump, an air pump controller and an air pump; the power battery module comprises a power battery; the charging module comprises a charging positive relay and a charging negative relay; the charging module is used for being externally connected with a charging pile, wherein the charging positive relay is connected with the positive electrode of the charging pile, and the charging negative relay is connected with the negative electrode of the charging pile; the air conditioning module comprises an air conditioning relay, a main negative relay, an electric air conditioner and a PTC heater; the PTC heater is connected in parallel at two ends of the electric air conditioner;

One end of the oil pump controller and one end of the air pump controller are connected with the anode of the charging pile through the auxiliary driving relay and the charging anode relay at the same time, and are connected with the anode of the power battery through the auxiliary driving relay; the other end of the oil pump controller is connected with an oil pump, and the other end of the air pump controller is connected with an air pump;

The air conditioner control method comprises the following steps:

judging whether the charging module is in a working state or not, specifically:

After detecting that the charging pile is connected to the charging module, the whole vehicle controller detects charging connection signals of a quick charging gun and a slow charging gun of the charging pile; when the charging connection signal CC2 signal of the fast charging gun is effective and the charging connection signal CC signal sent by the slow charging gun is ineffective, the charging pile charges the battery module, and the current of the power battery module is negative current;

Detecting that the charging pile is not connected to a charging module, and judging that the charging module is in a non-working state;

If the charging module is in a working state, detecting whether the current value of the charging module is not smaller than a preset threshold value; if yes, the air conditioning relay and the main negative relay are controlled to be closed, so that the charging pile supplies power to the air conditioning module through the closed charging positive relay, the charging negative relay and the main negative relay; the charging device comprises a charging module, a charging pile, an air conditioner module, a charging relay and a charging relay, wherein the charging relay and the charging relay are both closed under the working state of the charging module so as to enable the current of the power battery module to be reversed, the charging pile supplies power for the power battery, and the charging pile supplies power for the air conditioner module;

If the charging module is in a working state, the charging pile is connected to two ends of the DC-DC power supply through the closed charging positive relay, the closed charging negative relay, the closed main negative relay and the closed auxiliary driving relay, the charging pile provides a high-voltage power supply for the DC-DC power supply, and the charging pile provides a high-voltage power supply for the DC-DC power supply while supplying power for the power battery; the DC-DC power supply converts a high-voltage power supply provided by the charging pile into a low-voltage power supply, supplies the low-voltage power supply to the oil pump through the oil pump controller, and supplies the low-voltage power supply to the air pump through the air pump controller;

Detecting whether the current value of the charging module is not smaller than a preset threshold value, and further comprises:

If the current value of the charging module is smaller than the preset threshold value, the air conditioner relay is controlled to keep the off state, and reminding information of weak charging current is displayed to the cab;

before controlling the air-conditioning relay and the main negative relay to be closed, the method further comprises the following steps:

the method comprises the steps that a whole vehicle controller detects whether a key signal is an ON gear signal or not, detects whether a switching signal of a PTC heater of an air conditioner module is invalid, and controls an air conditioner relay and a main negative relay to be closed to enable an air conditioner compressor and a condenser fan to work when the key signal is detected to be the ON gear signal and the switching signal of the PTC heater of the air conditioner module is invalid;

If the charging module is in a non-working state, the power battery is connected to two ends of the DC-DC power supply through the closed main negative relay and the closed auxiliary driving relay, the power battery provides a high-voltage power supply for the DC-DC power supply, the DC-DC power supply converts the high-voltage power provided by the power battery into a low-voltage power supply, the low-voltage power supply is supplied to the oil pump through the oil pump controller, and the low-voltage power supply is supplied to the air pump through the air pump controller;

When a starting signal of the charging module is detected in the process that the power battery supplies power to the air conditioning module, the closing state of the air conditioning relay is kept, the charging positive relay and the charging negative relay are controlled to be closed, the charging pile supplies power to the power battery, namely the power battery module is charged in the current reverse direction, and meanwhile the charging pile supplies power to the air conditioning module;

After controlling both the charging positive relay and the charging negative relay to be closed, the method further comprises:

if the current value of the charging module is smaller than a preset threshold value, the air conditioner relay is controlled to be disconnected, so that the charging pile is suspended to supply power to the air conditioner module;

Before receiving the air conditioner starting instruction sent by the air conditioner module, the method further comprises the following steps:

2. The air conditioner control device of the new energy commercial vehicle is characterized by comprising a power battery module, a charging module, an air conditioner module and a conversion power supply module; the switching power supply module comprises an auxiliary driving relay, a DC-DC power supply, a storage battery, an oil pump controller, an oil pump, an air pump controller and an air pump; the power battery module comprises a power battery; the charging module comprises a charging positive relay and a charging negative relay; the charging module is used for being externally connected with a charging pile, wherein the charging positive relay is connected with the positive electrode of the charging pile, and the charging negative relay is connected with the negative electrode of the charging pile; the air conditioning module comprises an air conditioning relay, a main negative relay, an electric air conditioner and a PTC heater; the PTC heater is connected in parallel at two ends of the electric air conditioner;

the air conditioner control device is applied to the new energy commercial vehicle and comprises: the air conditioner comprises an air conditioner signal receiving module, a control module and a driving control module;

The control module is used for detecting whether the current value of the charging module is not smaller than a preset threshold value if the charging module is in a working state; if yes, the air conditioning relay and the main negative relay are controlled to be closed, so that the charging pile supplies power to the air conditioning module through the closed charging positive relay, the charging negative relay and the main negative relay; the charging device comprises a charging module, a charging pile, an air conditioner module, a charging relay and a charging relay, wherein the charging relay and the charging relay are both closed under the working state of the charging module so as to enable the current of the power battery module to be reversed, the charging pile supplies power for the power battery, and the charging pile supplies power for the air conditioner module;

When a starting signal of a charging module is detected in the process that the power battery supplies power to the air conditioning module, the control module controls the charging positive relay and the charging negative relay to be closed so as to enable the current of the power battery module to be reversed, the charging pile supplies power to the power battery, namely the current of the power battery module is reversed to charge, and meanwhile, the charging pile supplies power to the air conditioning module;

the control module includes: the device comprises a judging unit, a charging control unit and a non-charging control unit;

When the charging pile is detected to be connected to the charging module and the charging pile charges the battery module, judging that the charging module is in a working state; when the charging pile charges the battery module, the current of the power battery module is negative current; after detecting that the charging pile is connected to the charging module, the whole vehicle controller detects charging connection signals of a quick charging gun and a slow charging gun of the charging pile; when the charging connection signal CC2 signal of the fast charging gun is effective and the charging connection signal CC signal sent by the slow charging gun is ineffective, the charging pile charges the battery module, and the current of the power battery module is negative current;

When a starting signal of a charging module is detected in the process that the power battery supplies power for the air conditioning module, the charging positive relay and the charging negative relay are controlled to be closed, the charging pile supplies power for the power battery, namely the power battery module is charged in a current reverse direction, and meanwhile the charging pile supplies power for the air conditioning module;

The driving module comprises a main positive relay and a motor; the motor is connected with the power battery module through the main positive relay;

3. A computer readable storage medium, wherein the computer readable storage medium comprises a stored computer program; wherein the computer program, when running, controls the device in which the computer readable storage medium is located to execute the air conditioning control method for a new energy commercial vehicle according to claim 1.