Air conditioner loop of vehicle, power utilization system, control method, controller, medium, product and vehicle

Abstract

The embodiment of the invention provides an air conditioner loop of a vehicle, a power utilization system, a control method, a controller, a medium, a product and the vehicle, and the air conditioner loop is configured to actively discharge voltage under the condition that the vehicle collides. According to the embodiment of the invention, even under the condition that the air conditioner loop and the high-voltage wiring harness are disconnected or the connector falls off due to vehicle collision, the air conditioner loop can be utilized to actively discharge the voltage, the voltage electric energy can be discharged in time, electric shock of personnel is avoided, and the reliability and the safety of voltage discharge are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive electronic power, and particularly to an air-conditioning circuit of a vehicle, an electrical power system of a vehicle, an air-conditioning circuit control method, a vehicle controller, a computer-readable storage medium, a computer program product, and a vehicle. Background Art

[0002] With the rapid development of new energy automotive electronic power technology, safety has become a crucial focus in the development of new energy vehicles. Currently, high-voltage capacitors are arranged on the high-voltage bus of new energy vehicles, which can not only ensure the stability of the current but also have the functions of energy storage and filtering. However, when the vehicle is powered off or the high voltage is cut off due to a collision or a fault, due to the high-voltage energy stored in the capacitors on the high-voltage bus, if it is not discharged in time, there is a hidden danger of electric shock to personnel.

[0003] In the related art, active discharge is usually achieved by controlling the motor coil to consume electrical energy through an electric drive controller. However, when the high-voltage harness between the battery pack and the air-conditioning circuit or the high-voltage harness between the battery pack and the powertrain system is disconnected due to collision force or the connector falls off, there are problems such as the voltage and electrical energy not being discharged in time, and the reliability and safety of the voltage discharge of the entire vehicle are relatively low. Summary of the Invention

[0004] In view of the above problems, embodiments of the present invention are proposed to provide an air-conditioning circuit of a vehicle, an electrical power system of a vehicle, an air-conditioning circuit control method, a vehicle controller, a computer-readable storage medium, a computer program product, and a vehicle that overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above problems, in the first aspect of the present invention, an embodiment of the present invention discloses an air-conditioning circuit of a vehicle, and the air-conditioning circuit is configured to actively discharge voltage in the case of a collision of the vehicle.

[0006] Optionally, the air-conditioning circuit is connected to the detection system of the vehicle, and in the case where the detection system detects a collision of the vehicle, the air-conditioning circuit actively discharges voltage.

[0007] Optionally, the air-conditioning circuit is connected to the battery management system of the vehicle, and in the case of a collision of the vehicle and the battery management system instructs voltage discharge, the air-conditioning circuit actively discharges voltage.

[0008] Optionally, the air-conditioning circuit is configured to actively discharge voltage in the case of a collision of the vehicle and receiving an active discharge command sent by the battery management system.

[0009] Optionally, the air-conditioning circuit includes: a compressor, The compressor is configured to perform active voltage discharge in the event of a vehicle collision and upon receipt of an active discharge command sent by the battery management system.

[0010] In a second aspect of the present invention, an electrical power system of a vehicle is disclosed, including: the air-conditioning circuit as described above, In the event of a vehicle collision, the air-conditioning circuit performs active voltage discharge.

[0011] Optionally, it further includes: a detection system of the vehicle connected to the air-conditioning circuit, In the event that the detection system detects a vehicle collision, the air-conditioning circuit performs active voltage discharge.

[0012] Optionally, it further includes: a battery management system of the vehicle connected to the air-conditioning circuit, In the event that the detection system detects a vehicle collision and the battery management system indicates voltage discharge, the air-conditioning circuit performs active voltage discharge.

[0013] Optionally, it further includes: a powertrain system located between the air-conditioning circuit and the battery management system, In the event that the battery management system indicates voltage discharge, the powertrain system performs active voltage discharge.

[0014] Optionally, it further includes: a battery pack body disposed outside the battery management system, and the battery pack body is connected to the battery management system through a main contactor, In the event of a vehicle collision, the battery management system controls the battery pack body to disconnect the main contactor.

[0015] Optionally, in the event of receiving a collision signal sent by the detection system and an active discharge command sent by the battery management system, the air-conditioning circuit performs active voltage discharge.

[0016] Optionally, the powertrain system performs active voltage discharge upon receipt of the active discharge command.

[0017] In a third aspect of the present invention, an air-conditioning circuit control method is disclosed. The air-conditioning circuit includes the air-conditioning circuit as described above, and the method includes: In the event of a vehicle collision, control the air-conditioning circuit to perform active voltage discharge.

[0018] Optionally, the air-conditioning circuit is connected to the detection system of the vehicle. In the case of a vehicle collision, controlling the air-conditioning circuit to perform active voltage discharge includes: When the detection system detects that the vehicle has collided, controlling the air-conditioning circuit to perform active voltage discharge.

[0019] Optionally, the air-conditioning circuit is connected to the battery management system. In the case of a vehicle collision, controlling the air-conditioning circuit to perform active voltage discharge includes: When the vehicle collides and the battery management system instructs voltage discharge, controlling the air-conditioning circuit to perform active voltage discharge.

[0020] Optionally, when the vehicle collides and the battery management system instructs voltage discharge, controlling the air-conditioning circuit to perform active voltage discharge includes: When the vehicle collides and an active discharge command sent by the battery management system is received, controlling the air-conditioning circuit to perform active voltage discharge.

[0021] Optionally, the air-conditioning circuit includes a compressor. When the vehicle collides and an active discharge command sent by the battery management system is received, controlling the air-conditioning circuit to perform active voltage discharge includes: When the vehicle collides and an active discharge command sent by the battery management system is received, controlling the compressor to perform active voltage discharge.

[0022] In a fourth aspect of the present invention, an embodiment of the present invention discloses a vehicle controller, including a processor, a memory, and a computer program stored on the memory and capable of running on the processor. When the computer program is executed by the processor, the steps of the air-conditioning circuit control method described above are implemented.

[0023] In a fifth aspect of the present invention, an embodiment of the present invention discloses a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the air-conditioning circuit control method described above are implemented.

[0024] In a sixth aspect of the present invention, an embodiment of the present invention discloses a computer program product, including a computer program. When the computer program is executed by a processor, the steps of the air-conditioning circuit control method described above are implemented.

[0025] In a seventh aspect of the present invention, an embodiment of the present invention discloses a vehicle, including: the vehicle controller described above, or the electrical system of the vehicle described above, or the air-conditioning circuit described above.

[0026] The embodiments of the present invention include the following advantages: In the embodiments of the present invention, the air-conditioning circuit is configured to actively discharge voltage in the event of a vehicle collision. Even when the high-voltage harness is disconnected due to the force of the collision or the connector falls off, the air-conditioning circuit can be used for active discharge to achieve rapid voltage discharge, so as to ensure that when the vehicle collides, the voltage and electric energy can be discharged in time, avoid electric shock to personnel, and improve the reliability and safety of voltage discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of an embodiment of an air-conditioning circuit of a vehicle according to the present invention; Figure 2 is a schematic structural diagram of an embodiment of an electrical system of a vehicle according to the present invention; Figure 3 is a schematic structural diagram of another embodiment of an electrical system of a vehicle according to the present invention; Figure 4 is a schematic diagram of active discharge control of an electrical system of a first vehicle according to the present invention; Figure 5 is a schematic diagram of active discharge control of an electrical system of a second vehicle according to the present invention; Figure 6 is a schematic diagram of active discharge control of an electrical system of a third vehicle according to the present invention; Figure 7 is a schematic diagram of active discharge control of an electrical system of a fourth vehicle according to the present invention; Figure 8 is a flowchart of steps of an embodiment of an air-conditioning circuit control method according to the present invention.

[0028] Description of reference numerals: 100 - airbag control system, 110 - vehicle body collision sensor, 200 - air-conditioning circuit, 210 - compressor, 300 - battery management system, 400 - powertrain system, 410 - drive motor, 500 - battery pack body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference may be made to Figure 1 , which shows a schematic structural diagram of an embodiment of an air-conditioning circuit of a vehicle. The air-conditioning circuit 200 described herein is configured to actively discharge voltage in the event of a collision of the vehicle.

[0031] In the case of determining that the vehicle has collided, the voltage is consumed through the air-conditioning circuit, thereby achieving active voltage discharge.

[0032] In an alternative embodiment of the present invention, the air-conditioning circuit is connected to the detection system of the vehicle. When the detection system detects that the vehicle has collided, the air-conditioning circuit performs active voltage discharge.

[0033] The air-conditioning circuit can be electrically connected through the detection system, and the data detected by the detection system can be transmitted to the air-conditioning circuit. When the detection system detects that the vehicle has collided, in order to ensure voltage discharge, the air-conditioning circuit performs active voltage discharge.

[0034] In an alternative embodiment of the present invention, the air-conditioning circuit is connected to the battery management system of the vehicle. When the vehicle has collided and the battery management system instructs voltage discharge, the air-conditioning circuit performs active voltage discharge.

[0035] The air-conditioning circuit can be electrically connected through the battery management system, and the air-conditioning circuit can interact with the battery management system for data. When the vehicle has collided and the battery management system instructs voltage discharge, it indicates that voltage discharge is required currently, and the air-conditioning circuit can perform active voltage discharge.

[0036] In an alternative embodiment of the present invention, the air-conditioning circuit is configured to perform active voltage discharge when the vehicle has collided and receives an active discharge command sent by the battery management system.

[0037] When the vehicle has collided, the air-conditioning circuit can receive a command from the battery management system to determine whether to perform active discharge. When receiving the active discharge command sent by the battery management system, that is, when the vehicle has collided and receives the active discharge command sent by the battery management system, the air-conditioning circuit performs active voltage discharge. Thus, when the vehicle collides and voltage discharge is required, the air-conditioning circuit can perform active voltage discharge in a timely manner.

[0038] Further, the air-conditioning circuit includes: a compressor, The compressor is configured to perform active voltage discharge when the vehicle has collided and receives an active discharge command sent by the battery management system.

[0039] When the vehicle has collided and receives the active discharge command sent by the battery management system, active voltage discharge can be performed using the coil in the compressor, and the coil in the compressor can convert electrical energy into heat energy for discharge.

[0040] Reference may be made to Figure 2 , which shows a schematic structural diagram of an embodiment of the electrical system of a vehicle according to the present invention, and specifically may include the following parts: an air-conditioning circuit, In the case of a collision of the vehicle, the air-conditioning circuit performs active voltage discharge.

[0041] When the vehicle collides, the air-conditioning circuit can be used to perform active voltage discharge to reduce the high voltage, thereby preventing the user from getting an electric shock in the event of a vehicle collision.

[0042] In an alternative embodiment of the present invention, the electrical system of the vehicle further includes: a detection system of the vehicle connected to the air-conditioning circuit, In the case where the detection system detects a collision of the vehicle, the air-conditioning circuit performs active voltage discharge.

[0043] The detection system is used to detect various state parameters of the vehicle, such as the driving force of the current vehicle, the force-bearing situation, etc. The detection system determines whether the vehicle has collided based on the detected state of the vehicle. In the case where a vehicle collision is detected, the air-conditioning circuit performs active voltage discharge.

[0044] In an alternative embodiment of the present invention, the electrical system of the vehicle further includes: a battery management system of the vehicle connected to the air-conditioning circuit, In the case where the detection system detects a collision of the vehicle and the battery management system instructs voltage discharge, the air-conditioning circuit performs active voltage discharge.

[0045] The electrical system of the vehicle may include a detection system, an air-conditioning circuit, and a battery management system. The air-conditioning circuit is connected to the detection system and the battery management system.

[0046] The air-conditioning circuit may include a detection system, an air-conditioning circuit, and a battery management system. The detection system is used to detect various state parameters of the vehicle, such as the driving force of the current vehicle, the force-bearing situation, and so on. Further, the detection system can be reused as an airbag control system to control the active discharge of the air-conditioning circuit by reusing the airbag control system. The airbag control system is a vehicle auxiliary protection system. When the vehicle collides, the airbag control system provides a buffer for the occupants by inflating, reducing the impact and injury to the occupants. When a vehicle collision accident occurs, when the airbag control system detects that the impact force exceeds the set value, a collision signal will be generated. The collision signal indicates that a collision accident affecting personal safety has occurred in the vehicle, so it is necessary to request active voltage discharge to avoid electric shock to personnel. The airbag system immediately turns on the electric detonator circuit in the inflating element, ignites the ignition medium in the electric detonator, the flame ignites the ignition powder and the gas generator, generates a large amount of gas, and inflates the airbag in an extremely short time, causing the airbag to expand sharply, break through the decorative cover on the steering wheel and bulge towards the driver and the occupants, so that the heads and chests of the driver and the occupants are pressed against the airbag filled with gas, buffering the impact on the driver and the occupants. Subsequently, the gas in the airbag will be released. After receiving the collision signal, the airbag control system sends the collision signal to the air-conditioning circuit.

[0047] The Battery Management System (BMS) is an electronic device used to monitor, manage, and protect the battery system. By collecting various parameters of the battery (such as voltage, current, temperature, etc.) in real time and performing precise analysis and calculation based on these parameters, the battery system can be effectively controlled and managed. Battery state monitoring: including voltage monitoring, current monitoring, and temperature monitoring to judge key information such as the State of Charge (SOC) and State of Health (SOH) of the battery. The battery management system can achieve the following functions: Battery protection: including overcharge protection, over-discharge protection, over-current protection, and overheat protection to ensure the safe operation of the battery under various working conditions. Battery equalization management: By active or passive means, the power of each single battery in the battery pack is kept consistent, improving the overall performance and service life of the battery pack. Battery state estimation: Accurately estimating the remaining power and health state of the battery helps users use battery equipment reasonably and make a battery replacement or maintenance plan in advance.

[0048] When the detection system detects a vehicle collision and the battery management system indicates voltage discharge, the air-conditioning circuit performs active voltage discharge. Among them, the battery management system can also receive the collision signal. When receiving the collision signal, it can determine that voltage discharge is required, that is, an active discharge command can be generated. The active discharge command is an active discharge command for the battery management system to instruct the air-conditioning circuit to perform voltage discharge.

[0049] The air-conditioning circuit can be connected to the detection system and the battery management system respectively through a wiring harness. That is, both the detection system and the battery management system can send signals to the air-conditioning circuit respectively, and the air-conditioning circuit can receive the collision signal sent by the detection system and the active discharge command sent by the battery management system. When the air-conditioning circuit receives the collision signal and the active discharge command, it means that the air-conditioning circuit needs to participate in the active discharge at this time. The air-conditioning circuit can consume the voltage by using its own consumption components based on the collision signal and the active discharge command, so as to achieve the active discharge of the voltage.

[0050] In the embodiment of the present invention, the air-conditioning circuit is configured to actively discharge the voltage in the event of a vehicle collision. Even when the high-voltage wiring harness is disconnected due to the force of the collision or the connector falls off, the air-conditioning circuit can be used for active discharge to achieve rapid discharge of the voltage, so as to ensure that the voltage and electric energy can be discharged in time when the vehicle collides, avoid electric shock to personnel, and improve the reliability and safety of voltage discharge.

[0051] Refer to Figure 3 , which shows a schematic structural diagram of another embodiment of the vehicle's power consumption system of the present invention, and specifically may include the following parts: a detection system, an air-conditioning circuit, and a battery management system; the air-conditioning circuit is connected to the detection system and the battery management system, a powertrain system located between the air-conditioning circuit and the battery management system, a battery pack body disposed outside the battery management system, and the battery pack body is connected to the battery management system through a main contactor. The powertrain system is configured to actively discharge the voltage when receiving the active discharge command sent by the battery management system. The air-conditioning circuit actively discharges the voltage when the detection system detects that the vehicle has collided and the battery management system instructs voltage discharge.

[0052] The powertrain system is configured to send a main contactor disconnection request instruction to the battery management system when receiving the collision signal. The battery management system is configured to control the battery pack body to disconnect the main contactor when receiving the main contactor disconnection request instruction. The battery pack body is configured to send the active discharge command to the powertrain system after disconnecting the main contactor.

[0053] In an embodiment of the present invention, the electrical system of a vehicle may include: a detection system, an air-conditioning circuit, a battery management system, a powertrain system, and a battery pack body. The detection system is connected to the air-conditioning circuit and the battery management system. The battery management system is connected to the air-conditioning circuit, the powertrain system, and the battery pack body. The powertrain system is connected to the air-conditioning circuit. These components can be connected through in-vehicle network harnesses on the vehicle. For example, LIN (Local Interconnect Network), CAN (Controller Area Network), CANFD (Controller Area Network with Flexible Data-Rate), bus, in-vehicle Ethernet, etc. harnesses can be used for connection. LIN is a low-cost serial communication network with better EMC (electromagnetic compatibility) characteristics. The CAN bus is a serial communication network for distributed real-time control, and it is a high-performance and highly reliable serial communication network. CANFD has a higher communication rate and load rate. It retains the advantages of real-time performance and reliability of traditional CAN while being able to handle a larger amount of data. In-vehicle Ethernet has a higher communication rate and load rate and can support the transmission and real-time processing requirements of large-scale data.

[0054] The uses of the detection system, the air-conditioning circuit, and the battery management system can refer to the above embodiments and will not be specifically described here. The powertrain system can transfer the power generated by driving components such as motors or engines to the wheels, thereby driving the vehicle to move. The powertrain system not only is responsible for power transfer but also adjusts the magnitude of the power output by the engine through components such as the transmission, thereby controlling the speed of the vehicle. In addition, it can provide the torque required for the vehicle to move and adjust the steering of the wheels through components such as the differential, thereby controlling the driving direction of the vehicle. The battery pack is a power battery module, which is composed of multiple battery cells (electric cores), and each battery cell contains a positive electrode, a negative electrode, an electrolyte, etc. The battery pack is formed by combining multiple battery cells in series and parallel.

[0055] The detection system can detect whether the vehicle has collided, and when it detects that the vehicle has collided, it can send a collision signal to the air-conditioning circuit and the battery management system. Among them, the detection system can reuse the airbag control system. After receiving the collision signal, in order to prevent electric shock to personnel, the battery management system needs to release the voltage of the high-voltage circuit, close the connection between the high-voltage circuit and the low-voltage circuit, and discharge the voltage in the high-voltage circuit. It can generate a corresponding active discharge command when receiving the collision signal. The specific message content and format of the active discharge command can be determined according to the communication protocol of the vehicle.

[0056] Furthermore, a vehicle body collision sensor can be used for collision detection. The vehicle body collision sensor is connected to the detection system. When the vehicle body collision sensor detects a vehicle collision, it sends a collision signal to the detection system. When a vehicle collides, the vehicle will experience a sudden change in deceleration, which is usually much greater than the acceleration or deceleration during normal driving. The vehicle body collision sensor will immediately respond to this change in deceleration to determine a vehicle collision. Depending on the type of vehicle body collision sensor (such as a ball type, roller type, eccentric hammer type, etc.), the internal sensing elements (such as a ball, roller, eccentric hammer, etc.) will displace or rotate under the action of the inertial force generated by the collision. When the displacement or rotation amplitude is greater than a preset threshold, it is determined that the vehicle has collided. For example, for a ball type collision sensor, the ball will move along the guide cylinder towards two fixed contacts under the action of the inertial force, overcoming the magnetic force of the permanent magnet. For a roller type collision sensor, the roller will roll to the right under the action of the inertial force, overcoming the elastic force of the leaf spring. For an eccentric hammer type collision sensor, the eccentric hammer will rotate counterclockwise by a certain angle under the action of the inertial torque, overcoming the elastic torque of the return spring. When the displacement or rotation amplitude reaches a certain level, that is, exceeds the threshold, it will trigger a change in the internal circuit of the vehicle body collision sensor, thereby outputting a collision signal. The collision signal can be an analog signal or a digital signal, indicating the intensity and / or type of the collision.

[0057] In the embodiments of the present invention, when it is determined that a collision has occurred and high-voltage discharge is required, there are two high-voltage discharge circuits at this time. The first is to actively discharge the voltage through the air-conditioning circuit, and the second is to actively discharge the voltage using the powertrain system. Through the dual-discharge circuit of the powertrain system and the air-conditioning circuit, it is ensured that when the active discharge circuit is cut off due to the disconnection of the high-voltage harness or the detachment of the connector after a collision, and the active discharge function of the powertrain system fails for the air-conditioning circuit, the air-conditioning circuit can use its own active discharge function to quickly discharge the energy of the air-conditioning high-voltage system and avoid the risk of electric shock to personnel. For the first one to actively discharge the voltage through the air-conditioning circuit, it is realized by the control of the air-conditioning circuit. The air-conditioning circuit actively discharges the voltage when it receives the collision signal sent by the detection system and the active discharge command sent by the battery management system. The voltage electrical energy in the high-voltage circuit is consumed through the air-conditioning circuit. Specifically, the air-conditioning circuit includes an air-conditioning control module and a compressor connected to each other. The air-conditioning control module can be the ECU (Electronic Control Unit) of the air-conditioning circuit, which is used to control the motion states of the various components of the air-conditioning circuit. The compressor is the driving component of the air-conditioning refrigerant heat exchange system and can compress the refrigerant. There is at least one motor in the compressor. The air-conditioning control module is used to control the compressor to actively discharge the voltage when it receives the collision signal sent by the detection system and the active discharge command sent by the battery management system. After receiving the collision signal and the active discharge command, the air-conditioning control module controls the motor in the compressor to consume the voltage, and uses the motor winding to generate heat based on the voltage to achieve voltage discharge. For the second one to actively discharge the voltage through the powertrain system, it is realized by the control of the powertrain system. The powertrain system actively discharges the voltage when it receives the active discharge command, and consumes the voltage electrical energy in the high-voltage circuit through the powertrain system. Specifically, the powertrain system includes a power domain controller and a drive motor connected to each other. The power domain controller is used to control the drive motor to actively discharge the voltage when it receives the active discharge command. The power domain controller is the controller for controlling the vehicle power. When the power domain controller receives the active discharge command, it controls the drive motor to actively discharge the voltage, and uses the winding in the drive motor to consume the voltage in the high-voltage circuit to achieve active discharge.

[0058] In addition, during a collision, it is also necessary to cut off the high-voltage circuit to further prevent electric shock to personnel. That is, it is necessary to cut off the energy supply circuit where the power output harness of the battery pack body is located. When the powertrain system receives the collision signal, it is also necessary to cut off the energy supply circuit at the same time, and can send a main contactor disconnection request instruction to the battery management system. The main contactor disconnection request instruction is used to represent the instruction to request the disconnection of the main contactor. The specific message content and format of the main contactor disconnection request instruction can be determined according to the vehicle communication protocol.

[0059] When the battery management system receives a request instruction to disconnect the main contactor, it indicates that the main contactor in the battery pack body needs to be disconnected. The battery pack body is controlled to perform the operation of disconnecting the main contactor, disconnecting the main contactor to disconnect the high-voltage circuit, and preventing electric leakage caused by the contact between the high-voltage circuit and the external environment or the vehicle, thus avoiding accidents. After the battery pack disconnects the main contactor, it sends an active discharge command to the powertrain system, so that the voltage can be discharged after the high-voltage circuit is disconnected.

[0060] In summary, combined with Figure 3 , the voltage discharge logic of the electrical system is described as follows: When a vehicle collision occurs, the body collision sensor detects in real time. When the threshold exceeds the upper limit of the judgment threshold, the collision signal is sent to the airbag control system; when the airbag control system obtains the collision signal sent by the body sensor, it immediately transmits the collision signal to the battery management system, the powertrain system module, and the air-conditioning circuit; when the powertrain system module receives the collision signal sent by the airbag control system, it sends a request to disconnect the contactor to the battery management system to pull off the main contactor of the battery pack body. When the battery management system receives the collision signal sent by the airbag control system or the main contactor command request from the powertrain system, it disconnects the main contactor, ends the high-voltage process, and sends an active discharge command to the powertrain system.

[0061] After the powertrain system receives the active discharge command sent by the battery management system, the powertrain system quickly discharges the internal discharge module of the electric control and the high-voltage air-conditioning circuit by controlling the motor coil to consume energy, ensuring that the drive assembly and the high-voltage air-conditioning system reduce the high-voltage circuit bus voltage to below 60V within 3s.

[0062] At the same time, after the air-conditioning circuit receives the collision signal sent by the airbag control system and the active discharge command sent by the battery management system, it immediately executes the active discharge command on the internal discharge module of the air conditioner, controls it to perform a quick discharge, and realizes the rapid consumption of the energy of the high-voltage air-conditioning circuit, reducing the voltage of the high-voltage air-conditioning system to below 60V within 3s.

[0063] That is, after a collision, the active discharge process of the vehicle can refer to Figure 4When a vehicle collides, the powertrain system executes an active discharge command to quickly discharge the high-voltage circuit voltage through the high-voltage bus. At the same time, after receiving the collision signal sent by the airbag control system module and the active discharge command sent by the battery management system, the air-conditioning circuit uses its own active discharge function to execute the active discharge command sent by the battery management system to quickly discharge the voltage of the air-conditioning circuit and the high-voltage circuit. The dual discharge circuit ensures the reliability and safety of voltage and electrical energy discharge after vehicle collision. Through redundant design, it can better meet the requirement that the voltage drops below 60V within 5 - 60s after collision as specified by regulations. After a real vehicle collision, the voltage and electrical energy are discharged in a timely manner, greatly reducing the risks such as electric shock to personnel caused by the failure to discharge voltage and electrical energy in a timely manner after vehicle collision, and improving the reliability and safety of the active discharge of the high-voltage system after collision.

[0064] After a vehicle collides, if the high-voltage wire harness between the battery pack body and the powertrain system is disconnected or the connector falls off, the powertrain system cannot quickly discharge the high-voltage circuit voltage of the air-conditioning circuit through the high-voltage bus. At this time, the single active discharge circuit of the powertrain system fails for the air-conditioning circuit, and the corresponding discharge process can refer to Figure 5 The air-conditioning circuit controls the voltage of its own high-voltage system to perform active discharge by receiving the collision signal sent by the airbag control system and the active discharge command sent by the battery management system. This control method can ensure that when the discharge circuit of the powertrain system fails for the air-conditioning circuit, the air-conditioning circuit performs active discharge by itself, meeting the requirement of voltage safety after collision. The air-conditioning circuit participates in the active discharge of the high-voltage circuit or executes the active discharge command sent by its own system, and immediately starts active discharge after receiving any discharge circuit command, completing the rapid discharge of the residual voltage and electrical energy of the air-conditioning circuit, and quickly discharging the voltage and electrical energy of the air-conditioning circuit to a safe range.

[0065] After a vehicle collides, if the high-voltage wire harness between the air-conditioning circuit and the battery pack is disconnected or the high-voltage connector falls off, the powertrain system cannot quickly discharge the high-voltage circuit voltage of the air-conditioning circuit through the high-voltage bus. At this time, the single active discharge circuit of the powertrain system fails for the air-conditioning circuit, and the corresponding discharge process can refer to Figure 6 The air-conditioning circuit controls the voltage of its own high-voltage system to perform active discharge by receiving the collision signal sent by the airbag control system and the active discharge command sent by the battery management system. This control method can ensure that when the discharge circuit of the powertrain system fails for the air-conditioning circuit, the air-conditioning circuit performs active discharge by itself, meeting the requirement of voltage safety after collision. The air-conditioning circuit participates in the active discharge of the high-voltage circuit or executes the active discharge command sent by its own system, and immediately starts active discharge after receiving any discharge circuit command, completing the rapid discharge of the residual voltage and electrical energy of the air-conditioning circuit, and quickly discharging the voltage and electrical energy of the air-conditioning circuit to a safe range.

[0066] After a vehicle collision, if the high-voltage wire harness between the air-conditioning circuit and the battery pack is disconnected or the high-voltage connector falls off, and the high-voltage wire harness between the powertrain system and the battery pack assembly is disconnected or the high-voltage connector falls off. The powertrain system cannot quickly discharge the high-voltage circuit voltage of the air-conditioning circuit through the high-voltage bus. At this time, the single-channel active discharge circuit of the powertrain system fails for the air-conditioning circuit. The corresponding discharge process can be referred to Figure 7 , the air-conditioning circuit controls the active discharge of its own high-voltage system voltage by receiving the collision signal sent by the airbag control system and the active discharge command sent by the battery management system. This control method can ensure that when the discharge circuit of the powertrain system fails for the air-conditioning circuit, the air-conditioning circuit performs active discharge by itself, meeting the requirements of post-collision voltage safety. The air-conditioning circuit participates in the active discharge of the high-voltage circuit or executes the active discharge command sent by its own system, and immediately starts active discharge after receiving any discharge circuit command, completing the rapid discharge of the residual voltage and electric energy of the air-conditioning circuit, and quickly discharging the voltage and electric energy of the air-conditioning circuit to a safe range.

[0067] When a vehicle collision causes the high-voltage wire harness to be disconnected or the connector to fall off, resulting in the air-conditioning circuit being unable to participate in the active discharge of the entire high-voltage circuit, the active discharge function of the air-conditioning circuit itself can be used to quickly discharge the high-voltage circuit voltage and electric energy of the air-conditioning circuit, so that it can actively discharge the capacitor voltage below 60V within 3s through active discharge, meeting the requirements of regulations, while avoiding the risk of electric shock to personnel and improving the safety and reliability of the active discharge circuit after vehicle collision.

[0068] It should be noted that for the above embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the embodiments of the present invention are not limited by the described action sequence, because according to the embodiments of the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily essential for the embodiments of the present invention.

[0069] Referring to Figure 8 , a step flow chart of an embodiment of a control method for an air-conditioning circuit according to the present invention is shown. The control method for the air-conditioning circuit includes: Step 801, in the case of a vehicle collision, control the air-conditioning circuit to perform active voltage discharge.

[0070] When a vehicle collides, the air-conditioning circuit can be controlled to perform active discharge. The air-conditioning circuit consumes the voltage through its own components to complete the discharge, thereby realizing the active voltage discharge using the air-conditioning circuit.

[0071] In an alternative embodiment of the present invention, the air-conditioning circuit is connected to the detection system of the vehicle. In the case of a vehicle collision, controlling the air-conditioning circuit to perform active voltage discharge includes: When the detection system detects that the vehicle has collided, control the air-conditioning circuit to perform active voltage discharge.

[0072] When the detection system detects that the vehicle has collided, the air-conditioning circuit can be controlled to perform active voltage discharge to release the voltage below a safe voltage value, thereby ensuring the safety of personnel.

[0073] In an alternative embodiment of the present invention, the air-conditioning circuit is connected to the battery management system. In the case of a vehicle collision, controlling the air-conditioning circuit to perform active voltage discharge includes: When the vehicle collides and the battery management system indicates voltage discharge, control the air-conditioning circuit to perform active voltage discharge.

[0074] In an embodiment of the present invention, when the vehicle collides and the battery management system indicates voltage discharge, the air-conditioning circuit will be controlled to perform active voltage discharge, so that it can be determined that voltage discharge is performed when the vehicle collides and active discharge is required.

[0075] Furthermore, when a collision signal and an active discharge command are detected, it can be determined that the vehicle has collided and the air-conditioning circuit needs to perform voltage discharge, and the air-conditioning circuit can be controlled to perform active voltage discharge.

[0076] Specifically, the air-conditioning circuit is connected to the detection system and the battery management system. For the connection structure of the air-conditioning circuit to the detection system and the battery management system, reference may be made to the above embodiments. When a collision signal and an active discharge command are detected, controlling the air-conditioning circuit to perform active voltage discharge includes: When the air-conditioning circuit receives the collision signal sent by the detection system and the active discharge command sent by the battery management system, that is, when the air-conditioning circuit needs to perform active discharge, it can perform active voltage discharge. The air-conditioning circuit consumes the voltage through its own components to complete the discharge. Even when the high-voltage harness is disconnected due to collision force or the connector falls off, the high-voltage circuit voltage of the air-conditioning circuit is actively discharged through the air-conditioning circuit to achieve rapid voltage discharge. In addition, the air-conditioning circuit can also perform the active discharge action initiated by the powertrain system through the high-voltage circuit. The dual discharge circuit can timely discharge the high-voltage system voltage and electric energy after the vehicle collides, avoiding electric shock to personnel and improving the reliability and safety of voltage discharge.

[0077] Wherein, the collision signal is generated in the following manner: when the detection system detects that the collision intensity is greater than a preset intensity threshold, a collision signal is generated.

[0078] The detection system may have a corresponding sensing part, such as a collision sensor. When the detected collision intensity is greater than a preset intensity threshold, it can be determined that a vehicle collision has occurred and a collision signal can be generated.

[0079] In an alternative embodiment of the present invention, the air-conditioning circuit further includes: a powertrain system located between the air-conditioning circuit and the battery management system, a battery pack body disposed outside the battery management system, the battery pack body is connected to the battery management system through a main contactor, and the active discharge command is generated in the following manner: When the collision signal is detected, control the powertrain system to send a main contactor disconnection request instruction to the battery management system; the battery management system is configured to control the battery pack body to disconnect the main contactor when receiving the main contactor disconnection request instruction; the battery pack body is configured to generate the active discharge command after disconnecting the main contactor.

[0080] When a collision signal is detected, it is first necessary to disconnect the high-voltage circuit. The powertrain system can be controlled to send a main contactor disconnection request instruction to the battery management system. When the battery management system receives the main contactor disconnection request instruction, it controls the battery pack body to disconnect the main contactor, thereby cutting off the high-voltage circuit. And after the battery pack body disconnects the main contactor, an active discharge command can be generated to start the active discharge of the voltage.

[0081] In an alternative embodiment of the present invention, the air-conditioning circuit includes: a compressor. When the collision signal sent by the detection system and the active discharge command sent by the battery management system are detected, controlling the air-conditioning circuit to perform active voltage discharge includes: when the collision signal sent by the detection system and the active discharge command sent by the battery management system are detected, controlling the compressor to perform active voltage discharge.

[0082] When the air-conditioning circuit performs voltage discharge, the compressor can be used for discharge, so that the voltage can be quickly discharged.

[0083] Specifically, controlling the compressor to perform active voltage discharge includes: applying a voltage across the two ends of the coil of the compressor, and the coil generates heat based on the voltage to perform active voltage discharge.

[0084] When using the compressor to perform active voltage discharge, a voltage can be applied across the two ends of the coil of the compressor. The coil generates heat based on the voltage, converting electrical energy into heat energy to consume the electrical energy.

[0085] An embodiment of the present invention also discloses a vehicle controller, which includes a processor, a memory, and a computer program stored on the memory and capable of running on the processor. When the computer program is executed by the processor, the steps of the air-conditioning circuit control method described above are implemented.

[0086] Among them, the memory may include a random access memory (Random Access Memory, abbreviated as RAM), or may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. Optionally, the memory may also be at least one storage device located far from the aforementioned processor.

[0087] The aforementioned processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, abbreviated as CPU), a network processor (Network Processor, abbreviated as NP), etc.; it may also be a digital signal processor (Digital Signal Processing, abbreviated as DSP), an application specific integrated circuit (Application Specific Integrated Circuit, abbreviated as ASIC), a field-programmable gate array (Field-Programmable Gate Array, abbreviated as FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0088] An embodiment of the present invention also discloses a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the air-conditioning circuit control method described above are implemented.

[0089] An embodiment of the present invention also discloses a computer program product, including a computer program. When the computer program is executed by a processor, the steps of the air-conditioning circuit control method described above are implemented.

[0090] An embodiment of the present invention discloses a vehicle, including: the vehicle controller described above, or the electrical system of the vehicle described above, or the air-conditioning circuit described above.

[0091] The air-conditioning circuit is controlled by a controller to actively discharge voltage in the event of a vehicle collision.

[0092] Each embodiment in this specification is described in a progressive manner. The key point of each embodiment is the difference from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0093] Those skilled in the art should understand that the embodiments of the present invention may be provided as a method, an apparatus, or a computer program product. Therefore, the embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the embodiments of the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0094] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing terminal devices generate a device for implementing the functions specified in Figure 1 one or more flows and / or blocks Figure 1 one or more blocks.

[0095] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device that implements the functions specified in Figure 1 one or more flows and / or blocks Figure 1 one or more blocks.

[0096] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device, such that a series of operation steps are executed on the computer or other programmable terminal device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable terminal device provide steps for implementing the functions specified in Figure 1 one or more flows and / or blocks Figure 1 one or more blocks.

[0097] Although the preferred embodiments of the embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the embodiments of the present invention.

[0098] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or terminal device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the element.

[0099] The above has introduced in detail an air-conditioning circuit of a vehicle, an electrical power system of a vehicle, an air-conditioning circuit control method, a vehicle controller, a computer-readable storage medium, a computer program product and a vehicle provided by the present invention. Specific examples are used in this text to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A vehicle air conditioning circuit, characterized in that: The air conditioning circuit is configured to actively discharge voltage in the event of a collision of the vehicle.

2. The vehicle air conditioning circuit according to claim 1, characterized in that: The air conditioning circuit is connected to the detection system of the vehicle, and when the detection system detects that the vehicle has collided, the air conditioning circuit actively discharges the voltage.

3. The vehicle air conditioning circuit according to claim 1, characterized in that: The air conditioning circuit is connected to the battery management system of the vehicle. When the vehicle collides and the battery management system indicates voltage discharge, the air conditioning circuit actively discharges voltage.

4. The vehicle air conditioning circuit according to claim 3, characterized in that: The air conditioning circuit is configured to perform active voltage discharge when the vehicle collides and receives an active voltage discharge command sent by the battery management system.

5. The vehicle air conditioning circuit according to claim 4, characterized in that: The air conditioning circuit comprises: a compressor, The compressor is configured to perform active voltage discharge when a collision occurs to the vehicle and an active discharge command sent by the battery management system is received.

6. A vehicle power system, characterized in that: include: The air conditioning circuit according to any one of claims 1 to 5, In the event of a collision of the vehicle, the air conditioning circuit actively discharges voltage.

7. The vehicle power system according to claim 6, characterized in that: Also includes: a detection system of the vehicle connected to the air conditioning circuit, When the detection system detects that the vehicle has collided, the air-conditioning circuit actively discharges the voltage.

8. The vehicle power system according to claim 7, characterized in that: Also includes: a battery management system of the vehicle connected to the air conditioning circuit, When the detection system detects that the vehicle has collided and the battery management system indicates voltage discharge, the air-conditioning circuit actively discharges voltage.

9. The vehicle power system according to claim 8, characterized in that: Also includes: a powertrain system located between the air conditioning circuit and the battery management system, When the battery management system indicates voltage discharge, the powertrain system actively discharges voltage.

10. The vehicle power system according to claim 9, characterized in that: Also includes: A battery pack body is arranged outside the battery management system, and the battery pack body is connected to the battery management system through a main contactor. In the event of a collision of the vehicle, the battery management system controls the battery pack body to disconnect the main contactor.

11. The vehicle power system according to claim 9, characterized in that: When receiving the collision signal sent by the detection system and the active discharge command sent by the battery management system, the air-conditioning circuit performs active voltage discharge.

12. The vehicle power system according to claim 11, characterized in that: The powertrain system actively discharges voltage when receiving the active discharge command.

13. An air conditioning circuit control method, characterized in that: The air conditioning circuit comprises the air conditioning circuit according to any one of claims 1 to 5, and the method comprises: In the event of a vehicle collision, the air conditioning circuit is controlled to actively discharge voltage.

14. The method according to claim 13, characterized in that The air conditioning circuit is connected to the detection system of the vehicle, and in the event of a collision of the vehicle, the air conditioning circuit is controlled to actively discharge the voltage, including: When the detection system detects that the vehicle has collided, the air conditioning circuit is controlled to actively discharge the voltage.

15. The method according to claim 13, characterized in that The air conditioning circuit is connected to a battery management system, and in the event of a vehicle collision, the air conditioning circuit is controlled to actively discharge voltage, including: When the vehicle collides and the battery management system indicates voltage discharge, the air conditioning circuit is controlled to actively discharge the voltage.

16. The method according to claim 15, characterized in that When the vehicle collides and the battery management system indicates voltage discharge, controlling the air conditioning circuit to actively discharge voltage includes: When the vehicle collides and receives an active discharge command sent by the battery management system, the air conditioning circuit is controlled to perform active voltage discharge.

17. The method according to claim 16, characterized in that The air conditioning circuit includes: a compressor, and when the vehicle collides and receives an active discharge command sent by the battery management system, controlling the air conditioning circuit to perform active voltage discharge includes: When the vehicle collides and receives an active discharge command sent by the battery management system, the compressor is controlled to perform active voltage discharge.

18. A vehicle controller, characterized in that: It comprises a processor, a memory and a computer program stored in the memory and capable of running on the processor, and when the computer program is executed by the processor, the steps of the air conditioning circuit control method as described in any one of claims 13 to 17 are implemented.

19. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the air-conditioning loop control method according to any one of claims 13 to 17 are implemented.

20. A computer program product, characterized in that It comprises a computer program, which, when executed by a processor, implements the steps of the air conditioning circuit control method as described in any one of claims 13 to 17.

21. A vehicle, characterized in that: include: A vehicle controller as claimed in claim 18, or a vehicle power system as claimed in any one of claims 6 to 12, or an air conditioning circuit as claimed in any one of claims 1 to 5.

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