Electric vehicle assistance systems, electric vehicles, and electric vehicle assistance control methods

Abstract

The present invention provides an electric vehicle auxiliary system, an electric vehicle and an electric vehicle auxiliary control method. Among them, the electric vehicle auxiliary system includes: an auxiliary drive component, which is electrically connected to the power supply device of the electric vehicle to obtain electric energy; an actuator component, which includes multiple actuators, and the multiple actuators are connected to the output end of the auxiliary drive component and run under the drive of the auxiliary drive component to enable the corresponding functional system in the electric vehicle to operate; an emergency drive component, which is transmission-connected to the drive system of the electric vehicle to obtain power, and the emergency drive component can be connected or disconnected with the auxiliary drive component; a controller, which is used to control the working state of the auxiliary drive component, multiple actuators and the emergency drive component, and when a power-on abnormality occurs, the emergency drive component is controlled to output power to the auxiliary drive component. Through the technical solution of the present invention, the integrated setting of the auxiliary system is realized, the structure and connection are simplified, and emergency power can be provided under abnormal conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle control, and in particular to an electric vehicle auxiliary system, an electric vehicle and an electric vehicle auxiliary control method. Background Art

[0002] At present, electric vehicles have been widely used. Since electric vehicles do not have engines, the power steering, air compression and heat dissipation systems that originally obtained power from the engine need to be driven and controlled by additional auxiliary systems. The auxiliary systems in the prior art mostly adopt a distributed setting, that is, a set of driving and control devices is configured for each system separately, resulting in a large number of auxiliary control system components, complex structure and connection, low energy utilization efficiency, high overall energy consumption, and is not conducive to controlling the cost of use. In addition, when the power system of the electric vehicle in the prior art is abnormal, such as the failure of the high-voltage circuit or the failure of the low-voltage control circuit, the auxiliary system will lose the power source and cannot continue to work, and the electric vehicle has a safety hazard. Summary of the invention

[0003] The present invention aims to improve at least one of the technical problems existing in the prior art or related art.

[0004] Therefore, an object of the present invention is to provide an electric vehicle auxiliary system.

[0005] Another object of the present invention is to provide an electric vehicle.

[0006] Another object of the present invention is to provide an auxiliary control method for an electric vehicle.

[0007] In order to achieve the above-mentioned purpose, the first technical solution of the present invention provides an electric vehicle auxiliary system, including: an auxiliary drive component, which is electrically connected to the power battery of the electric vehicle to obtain electrical energy; an actuator component, which includes multiple actuators, and the multiple actuators are connected to the first output terminal and operate under the drive of the auxiliary drive component to enable the corresponding functional system in the electric vehicle to operate; an emergency drive component, which is transmission-connected to the drive system of the electric vehicle to obtain power, and the emergency drive component can be connected or disconnected from the auxiliary drive component; a controller, which is electrically connected to the auxiliary drive component, multiple actuators and the emergency drive component to control the working status of the auxiliary drive component, multiple actuators and the emergency drive component, and when the auxiliary drive component or the high-voltage system of the electric vehicle is abnormally powered on, the emergency drive component is controlled to be connected to the auxiliary drive component to output power to the auxiliary drive component.

[0008] According to the technical solution of the first aspect of the present invention, the auxiliary system of an electric vehicle includes an auxiliary drive assembly, an actuator assembly, an emergency drive assembly and a controller. The auxiliary drive assembly is electrically connected to the power battery of the electric vehicle, obtains electrical energy from the power battery, and provides driving force for the actuator assembly through the operation of the auxiliary drive assembly. The actuator assembly includes a plurality of actuators, which are respectively connected to corresponding functional systems in the electric vehicle to perform corresponding functions. The output end provided in the auxiliary drive assembly is connected to different actuators to drive the actuators to operate so that the corresponding functional systems in the electric vehicle can operate. Specifically, the actuators include but are not limited to steering pumps, air compressors, water pumps, and can also be other functional systems in electric vehicles. The output end of the auxiliary drive assembly can be one or more, so as to facilitate connection with different actuators.

[0009] The emergency drive assembly is connected to the driving system of the electric vehicle in a transmission manner to obtain power; the emergency drive assembly can be connected or disconnected from the auxiliary drive assembly. The controller is electrically connected to the auxiliary drive assembly, multiple actuators and the emergency drive assembly to control the working state of the auxiliary drive assembly, multiple actuators and the emergency drive assembly. During the driving process of the electric vehicle, if the auxiliary drive assembly or the high-voltage system of the electric vehicle is abnormally powered, and the auxiliary drive assembly loses its power source, the controller controls the emergency drive assembly to be connected to the auxiliary drive assembly to use the power of the drive system to drive the auxiliary drive assembly to continue to operate. Among them, when the high-voltage system of the electric vehicle is abnormally powered and the drive system also loses its power source, the inertial kinetic energy of the electric vehicle drives the drive system to operate, and then the emergency drive assembly transmits power to the auxiliary drive assembly to support the operation of the actuator until the kinetic energy of the electric vehicle is exhausted and stops moving. It should be noted that the emergency drive assembly can be connected to any device or component in the drive system of the electric vehicle that can output torque, such as a drive motor, a transmission, a transmission shaft, a drive axle, and a wheel, and can achieve the purpose of using the kinetic energy of the entire vehicle to drive the emergency drive assembly to operate.

[0010] The electric vehicle auxiliary system in this solution realizes the integrated setting of the auxiliary system, simplifies the structure and connection of the auxiliary system of the electric vehicle, and is conducive to reducing space occupation, energy consumption and use costs. At the same time, when the auxiliary drive component of the electric vehicle is abnormally powered or the high-voltage system of the electric vehicle is abnormally powered, the emergency drive component can continue to provide emergency power to the various functional systems of the electric vehicle, allowing the electric vehicle to continue to travel for a period of time, which can be used for emergency avoidance, which is conducive to reducing the possibility of accidents and reducing safety hazards.

[0011] It is understandable that during the driving of an electric vehicle, especially when driving at high speeds, if the electric vehicle is in an abnormal power-on state, the auxiliary system loses power source, and the steering system, air supply system, cooling system and other functional systems of the electric vehicle cannot work normally, resulting in increased difficulty in controlling the electric vehicle or even loss of control, which can easily cause accidents. By setting up an emergency drive component, the power required by the functional system during emergency avoidance can be provided, which can effectively alleviate the above problems.

[0012] In addition, the electric vehicle auxiliary system in the above technical solution provided by the present invention may also have the following additional technical features:

[0013] In the above technical solution, the auxiliary drive component includes: an auxiliary motor, each of the two ends of the auxiliary motor is provided with an output shaft, and one of the output shafts forms a first output end of the auxiliary drive component; a hydraulic motor, the hydraulic motor is provided with an input shaft, an output shaft and a hydraulic input end, the input shaft of the hydraulic motor is transmission-connected with another output shaft of the auxiliary motor, and the output shaft of the hydraulic motor forms a second output end of the auxiliary drive component, wherein the emergency drive component has a hydraulic output end, and when the high-voltage system of the auxiliary motor or the electric vehicle is abnormally powered on, the controller controls the hydraulic output end of the emergency drive component to be connected with the hydraulic input end of the hydraulic motor to drive the hydraulic motor to operate.

[0014] In this technical solution, the auxiliary drive assembly includes an auxiliary motor and a hydraulic motor. The auxiliary motor is a dual-output shaft motor, and the two output shafts are respectively arranged at the two ends of the auxiliary motor and can rotate synchronously to output power in different directions and drive different actuators to operate. An output shaft of the auxiliary motor forms the first output end of the auxiliary drive assembly. The hydraulic motor is an input shaft motor, which is provided with an input shaft, an output shaft and a hydraulic input end. The input shaft of the hydraulic motor is transmission-connected with another output shaft of the auxiliary motor, and the output shaft of the hydraulic motor forms the second output end of the auxiliary drive assembly. The emergency drive assembly has a hydraulic output end, which can be connected to the hydraulic input end of the hydraulic motor, so that when the auxiliary motor or the high-voltage system of the electric vehicle is abnormally powered and causes the auxiliary motor to lose its power source, the controller controls the hydraulic output end of the emergency drive assembly to be connected to the hydraulic input end of the hydraulic motor to drive the hydraulic motor to operate, thereby driving the auxiliary motor to rotate, so as to continue to output power to the actuator.

[0015] It should be noted that when the hydraulic motor obtains power through the hydraulic input end, the input shaft of the hydraulic motor can also play the role of outputting power; when the auxiliary motor is abnormally powered, power can also be input by one output shaft and output by another output shaft.

[0016] In the above technical scheme, the actuator assembly specifically includes: a steering pump connected to the first output end, and the output end of the steering pump is used to drive the steering system of the electric vehicle to achieve power steering; an air compressor connected to the second output end, and used to compress the gas in the air supply system of the electric vehicle; a water pump connected to the second output end, and used to drive the flow of liquid in the cooling system of the electric vehicle, wherein the controller is electrically connected to the steering pump, the air compressor and the water pump to control the working status of the steering pump, the air compressor and the water pump.

[0017] In this technical solution, the actuator assembly specifically includes a steering pump, an air compressor and a water pump. The steering pump is connected to the first output end to provide steering assistance to the steering system of the electric vehicle under the drive of the auxiliary motor to achieve power steering. The air compressor is used to compress the gas in the air supply system of the electric vehicle, and the water pump is used to drive the flow of liquid in the heat dissipation system of the electric vehicle. The air compressor and the water pump are respectively connected to the second output end of the auxiliary drive assembly to operate under the drive of the hydraulic motor. The controller is electrically connected to the steering pump, the air compressor and the water pump to control the working state of the steering pump, the air compressor and the water pump. Among them, when the air compressor and the water pump have no working demand, the air compressor and the water pump can be operated at no load by unloading the pressure air end of the air compressor output and the water flow self-circulation at the water pump end, and the non-stop operation can be maintained with very little energy consumption, thereby reducing energy consumption.

[0018] In the above technical solution, the actuator assembly includes: a first electromagnetic clutch, the two ends of the first electromagnetic clutch are respectively connected to the output shaft of the hydraulic motor and the input end of the air compressor, so that the output shaft of the hydraulic motor is connected or disconnected with the input end of the air compressor; a second electromagnetic clutch, the two ends of the second electromagnetic clutch are respectively connected to the output shaft of the hydraulic motor and the input end of the water pump, so that the output shaft of the hydraulic motor is connected or disconnected with the input end of the water pump, wherein the controller is electrically connected to the first electromagnetic clutch and the second electromagnetic clutch to respectively control the working states of the first electromagnetic clutch and the second electromagnetic clutch.

[0019] In this technical solution, the actuator assembly also includes a first electromagnetic clutch and a second electromagnetic clutch. The two ends of the first electromagnetic clutch are respectively connected to the output shaft of the hydraulic motor and the input end of the air compressor, so as to realize the connection or disconnection between the air compressor and the hydraulic motor through the first electromagnetic clutch. Similarly, the two ends of the second electromagnetic clutch are respectively connected to the output shaft of the hydraulic motor and the input end of the water pump, so as to realize the connection or disconnection between the water pump and the hydraulic motor through the second electromagnetic clutch. The controller is electrically connected to the first electromagnetic clutch and the second electromagnetic clutch to control the working state of the first electromagnetic clutch according to the control instruction corresponding to the air compressor, so that the air compressor is connected or disconnected with the hydraulic motor, and to control the working state of the second electromagnetic clutch according to the control instruction corresponding to the water pump, so that the water pump is connected or disconnected with the hydraulic motor. This solution can realize corresponding control operations according to the actual working needs of the air compressor or the water pump, which is conducive to energy saving.

[0020] In the above technical solution, the actuator assembly also includes: a first pulley, which is connected to the output shaft of the hydraulic motor through a transmission belt; a third electromagnetic clutch, the two ends of the third electromagnetic clutch are respectively connected to the first pulley and the input end of the air compressor, so that the first pulley is connected to or disconnected from the input end of the air compressor; a second pulley, which is connected to the output shaft of the hydraulic motor through a transmission belt; a fourth electromagnetic clutch, the two ends of the fourth electromagnetic clutch are respectively connected to the second pulley and the input end of the water pump, so that the second pulley is connected to or disconnected from the input end of the water pump, wherein the controller is electrically connected to the third electromagnetic clutch and the fourth electromagnetic clutch to respectively control the working states of the third electromagnetic clutch and the fourth electromagnetic clutch.

[0021] In this technical solution, the actuator assembly also includes a first pulley, a third electromagnetic clutch, a second pulley and a fourth electromagnetic clutch. The first pulley is connected to the output shaft of the hydraulic motor through a transmission belt, and the two ends of the third electromagnetic clutch are respectively connected to the first pulley and the input end of the air compressor, so as to realize the connection between the air compressor and the hydraulic motor through the third clutch, the first pulley and the transmission belt, so as to realize long-distance power transmission. The third electromagnetic clutch is electrically connected to the controller, and the controller can control the connection or disconnection of the third electromagnetic clutch according to the control instruction corresponding to the air compressor. Similarly, the second pulley is connected to the output shaft of the hydraulic motor through a transmission belt, and the two ends of the fourth electromagnetic clutch are respectively connected to the second pulley and the input end of the water pump, so as to realize the connection between the water pump and the hydraulic motor through the second pulley, the transmission belt and the fourth electromagnetic clutch, so as to realize long-distance power transmission. The fourth electromagnetic clutch is electrically connected to the controller, and the controller can control the connection or disconnection of the fourth electromagnetic clutch according to the control instruction corresponding to the water pump. In this embodiment, long-distance power transmission can be realized, so as to adapt the assembly position of the air compressor and the water pump in the electric vehicle, and at the same time, corresponding operation control can be realized according to the actual needs of the air compressor or the water pump, which is conducive to energy saving.

[0022] In the above technical solution, the emergency drive component includes: a hydraulic pump, the input end of the hydraulic pump is transmission-connected to the drive system of the electric vehicle, and the output end of the hydraulic pump is connected to the hydraulic input end of the hydraulic motor through a hydraulic pipeline; a solenoid valve is arranged in the hydraulic pipeline, wherein the controller is electrically connected to the solenoid valve to control the solenoid valve to open or close the hydraulic pipeline, and when the auxiliary motor or the high-voltage system of the electric vehicle is in an abnormal power-on state, the solenoid valve is controlled to open the hydraulic pipeline.

[0023] In this technical solution, the emergency component includes a hydraulic pump and a solenoid valve. The input end of the hydraulic pump is connected to the driving system of the electric vehicle in a transmission manner so as to operate under the drive of the driving system; the output end of the hydraulic pump is connected to the hydraulic input end of the hydraulic motor through a hydraulic pipeline, and can output hydraulic pressure to the hydraulic motor to drive the hydraulic motor to operate. A solenoid valve is provided in the hydraulic pipeline for conducting or closing the hydraulic pipeline. A controller is electrically connected to the solenoid valve to control the working state of the solenoid valve. Among them, under the normal working state of the electric vehicle, the solenoid valve closes the hydraulic pipeline; when the auxiliary motor or the high-voltage system of the electric vehicle is abnormally powered, the controller controls the solenoid valve to conduct the hydraulic pipeline, and the hydraulic pump outputs hydraulic pressure to the hydraulic motor under the drive of the driving system, so that when the auxiliary motor loses the power source, it can still rotate under the drive of the hydraulic motor to support the actuator to continue working, so that the electric vehicle can still run normally for a period of time, which can be used for emergency avoidance, which is conducive to reducing the possibility of accidents and reducing safety hazards.

[0024] It should be noted that the hydraulic pump can be connected to any device or component in the electric vehicle's drive system that can output torque, such as a drive motor, a transmission, a drive shaft, a drive axle, and a wheel, so as to achieve the purpose of utilizing the kinetic energy of the entire vehicle to drive the hydraulic pump to operate.

[0025] The second technical solution of the present invention provides an electric vehicle, comprising: a vehicle body; a power battery, arranged in the vehicle body; a drive system, electrically connected to the power battery, for driving the vehicle body to travel; an electric vehicle auxiliary system as described in any one of the above-mentioned first technical solutions, arranged in the vehicle body, the auxiliary drive component in the electric vehicle auxiliary system is electrically connected to the power battery, and the emergency drive component in the electric vehicle auxiliary system is transmission-connected to the drive system.

[0026] According to the second technical solution of the present invention, an electric vehicle comprises a vehicle body, a power battery, a drive system and an electric vehicle auxiliary system of any one of the above-mentioned first technical solutions. The power battery is arranged in the vehicle body and is used to supply the electric energy required for the vehicle body to travel. The drive system is electrically connected to the power battery, and obtains electric energy through the power battery and then drives the vehicle body to travel through the drive system. The electric vehicle auxiliary system is arranged in the vehicle body, and the auxiliary drive component in the electric vehicle auxiliary system is electrically connected to the power battery to obtain electric energy through the power battery to output power to the actuator to drive the actuator to operate. The emergency drive component in the electric vehicle auxiliary system is connected to the drive system in a transmission manner, so that when the auxiliary drive component is abnormally powered on or the high-voltage system of the electric vehicle is abnormally powered on, causing the auxiliary drive component to lose the power source, the emergency drive component obtains power from the drive system and outputs power to the auxiliary drive component to support the actuator to continue to work. When the above abnormal conditions occur during the driving of the electric vehicle, the emergency drive component can enable the electric vehicle to continue to travel normally for a period of time for emergency avoidance, thereby reducing the possibility of accidents and improving the safety performance of the electric vehicle.

[0027] It should be noted that the emergency drive component can be connected to any device or component in the drive system of the electric vehicle that can output torque, such as a drive motor, a transmission, a drive shaft, a drive axle, and a wheel, so as to achieve the purpose of utilizing the kinetic energy of the entire vehicle to drive the emergency drive component to operate.

[0028] In addition, the electric vehicle in this solution also has all the technical effects of the electric vehicle auxiliary system in any one of the above-mentioned first aspect technical solutions, which will not be repeated here.

[0029] In the above technical solution, the electric vehicle is an electric mixer truck; and / or the controller in the electric vehicle auxiliary system is a whole vehicle controller provided by the electric vehicle.

[0030] In this technical solution, the electric vehicle is an electric mixer truck, and a stirring device can be provided on the body of the electric vehicle. By providing an electric vehicle auxiliary system on the electric mixer truck, the operation of multiple functional systems of the electric mixer truck can be supported through the auxiliary drive component, and when the electric mixer truck is in an abnormal power-on state, the emergency drive component continues to provide power, so that the electric mixer truck can continue to travel for a period of time for emergency avoidance. It can be understood that the electric mixer truck is heavy and has a large inertia during driving. When the auxiliary drive component loses its power source due to power-on abnormality, if the steering assist, air brake and other functions cannot work normally, it is easy to cause the vehicle to lose control, which is very likely to cause an accident. At this time, the emergency drive component can use the inertial kinetic energy of the electric mixer truck to provide power for the auxiliary drive component, extend the normal working time of the electric mixer truck, and effectively reduce the possibility of accidents.

[0031] By setting the controller in the electric vehicle auxiliary system to be the electric vehicle's own vehicle controller, integrated control of the electric vehicle can be achieved without the need to assemble a dedicated controller device, which is conducive to simplifying connections and reducing equipment costs.

[0032] The third technical solution of this aspect provides an electric vehicle auxiliary control method, which is used for the electric vehicle auxiliary system in the above-mentioned first technical solution. The electric vehicle auxiliary control method includes: step S100: receiving a start signal corresponding to the electric vehicle auxiliary system; step S200: controlling the operation of the auxiliary motor according to the start signal; step S300: controlling the emergency drive component and the hydraulic motor to be in a disconnected state.

[0033] According to the third technical solution of the present invention, the electric vehicle auxiliary control method is used for the electric vehicle auxiliary system in the above-mentioned first technical solution. When the start signal corresponding to the electric vehicle auxiliary system is received, the auxiliary motor is controlled to run according to the start signal, and the hydraulic motor can be driven to run by the auxiliary motor, and power is output to the actuator to drive the actuator to work, so that the corresponding functional system in the electric vehicle can run. By controlling the emergency drive component and the hydraulic motor to be in a disconnected state, when the electric vehicle is in normal working state, the hydraulic motor can only obtain power through the auxiliary motor to reduce energy consumption and improve driving efficiency. At the same time, the emergency drive component is used as a backup power source for emergency use in emergency situations. The electric vehicle auxiliary control method in this solution also has all the beneficial effects of the electric vehicle auxiliary system of any one of the above-mentioned first technical solutions, which will not be repeated here.

[0034] In the above technical scheme, the emergency drive component of the electric vehicle includes a hydraulic pump and a solenoid valve, the input end of the hydraulic pump is transmission-connected to the drive system of the electric vehicle, the output end of the hydraulic pump is connected to the hydraulic input end of the hydraulic motor through a hydraulic pipeline, and the solenoid valve is arranged in the hydraulic pipeline. The electric vehicle auxiliary control method also includes: step S410: obtaining the power-on status signal of the auxiliary motor and the power-on status signal of the high-voltage system of the electric vehicle; step S420: judging whether the power-on status of the auxiliary motor or the high-voltage system of the electric vehicle is abnormal, and generating a judgment result; if the judgment result is yes, executing step S430: controlling the solenoid valve to conduct the hydraulic pipeline so that the hydraulic pump drives the hydraulic motor to operate; if the judgment result is no, executing step S440: controlling the solenoid valve to close the hydraulic pipeline so that the hydraulic pump is disconnected from the hydraulic motor.

[0035] In this technical solution, the emergency drive component includes a hydraulic pump and a solenoid valve. The input end of the hydraulic pump is connected to the drive system of the electric vehicle to obtain power; the output end of the hydraulic pump is connected to the hydraulic input end of the hydraulic motor through a hydraulic pipeline, wherein a solenoid valve is provided in the hydraulic pipeline to conduct or close the hydraulic pipeline. By obtaining the power-on state signal of the auxiliary motor and the power-on state signal of the high-voltage system of the electric vehicle, and judging whether the power-on state of the auxiliary motor or the high-voltage system of the electric vehicle is abnormal, it is determined whether the auxiliary system of the electric vehicle is in a normal working state, and a judgment result is generated to provide a basis for whether to start the emergency drive component in the subsequent steps. If the judgment result is yes, the solenoid valve is controlled to conduct the hydraulic pipeline so that the output end of the hydraulic pump is connected to the input end of the hydraulic motor, the emergency drive state is started, the power of the drive system is used to drive the hydraulic motor to continue to operate, and the actuator is supported to continue to maintain the working state, so that when the above abnormal conditions occur in the driving state of the electric vehicle, especially when the above abnormal conditions occur during high-speed driving, the electric vehicle can continue to drive normally for a period of time, so as to facilitate emergency avoidance, reduce the possibility of accidents, and help reduce safety hazards. If the judgment result is no, it means that the electric vehicle auxiliary system is in normal working condition and there is no need to start the emergency state. At this time, the solenoid valve is controlled to close the hydraulic pipeline to disconnect the hydraulic pump and the hydraulic motor to reduce energy consumption.

[0036] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0038] Figure 1 A schematic block diagram of an electric vehicle auxiliary system according to an embodiment of the present invention is shown;

[0039] Figure 2 A schematic block diagram of an electric vehicle auxiliary system according to an embodiment of the present invention is shown;

[0040] Figure 3 A schematic diagram of an electric vehicle auxiliary system according to an embodiment of the present invention is shown;

[0041] Figure 4 A schematic diagram of an electric vehicle auxiliary system according to an embodiment of the present invention is shown;

[0042] Figure 5 A schematic diagram of an electric vehicle auxiliary system according to an embodiment of the present invention is shown;

[0043] Figure 6 A schematic diagram of an electric vehicle auxiliary system according to an embodiment of the present invention is shown;

[0044] Figure 7 A schematic diagram of an electric vehicle auxiliary system according to an embodiment of the present invention is shown;

[0045] Figure 8 A schematic block diagram of an electric vehicle according to an embodiment of the present invention is shown;

[0046] Fig. 9 A schematic block diagram of an electric vehicle according to an embodiment of the present invention is shown;

[0047] Fig.10 A flow chart of an electric vehicle auxiliary control method according to an embodiment of the present invention is shown;

[0048] Fig.11 A flow chart of an electric vehicle auxiliary control method according to an embodiment of the present invention is shown.

[0049] Figures 1 to 9 The corresponding relationship between the reference numerals and components is as follows:

[0050] 1 electric vehicle auxiliary system, 11 auxiliary drive assembly, 111 auxiliary motor, 112 hydraulic motor, 12 actuator assembly, 121 steering pump, 122 air compressor, 123 water pump, 1241 first electromagnetic clutch, 1242 second electromagnetic clutch, 1243 third electromagnetic clutch, 1244 fourth electromagnetic clutch, 1245 first pulley, 1246 second pulley, 13 emergency drive assembly, 131 hydraulic pump, 132 solenoid valve, 14 controller, 2 electric vehicle, 21 vehicle body, 22 power battery, 23 drive system, 24 steering system, 25 air supply system, 26 cooling system. DETAILED DESCRIPTION

[0051] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0052] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0053] Refer to the following Figures 1 to 11 An electric vehicle auxiliary system, an electric vehicle, and an electric vehicle auxiliary control method according to some embodiments of the present invention are described.

[0054] Embodiment 1

[0055] In this embodiment, an electric vehicle auxiliary system 1 is provided, which is used for an electric vehicle and includes an auxiliary drive component 11 , an actuator component 12 , an emergency drive component 13 and a controller 14 .

[0056] like Figure 1 As shown, the auxiliary drive component 11 is used to provide power to the electric vehicle auxiliary system 1 when the electric vehicle is in normal working condition; the auxiliary drive component 11 obtains electrical energy by being electrically connected to the power battery of the electric vehicle. The actuator component 12 includes a plurality of actuators, which are respectively connected to the corresponding functional systems in the electric vehicle to perform corresponding functions. Among them, a plurality of actuators are connected to the output end of the auxiliary drive component 11 to provide driving force for the actuators through the operation of the auxiliary drive component 11, drive the actuators to work, and enable the corresponding functional systems in the electric vehicle to operate. Among them, the actuators include but are not limited to steering pumps, air compressors, water pumps, and can also be other functional systems in the electric vehicle. The output end of the auxiliary drive component can be one or more, so as to facilitate connection with different actuators.

[0057] The emergency drive assembly 13 is used to provide emergency power for the electric vehicle auxiliary system 1 when the electric vehicle is in an abnormal state. The emergency drive assembly 13 is connected to the drive system 23 of the electric vehicle in a transmission manner and can be connected or disconnected from the auxiliary drive assembly 11. The emergency drive assembly 13 can be connected to any device or component in the drive system 23 of the electric vehicle that can output torque, such as a drive motor, a transmission, a transmission shaft, a drive axle, and a wheel, and can achieve the purpose of using the kinetic energy of the entire vehicle to drive the emergency drive assembly 13 to operate.

[0058] The controller 14 is electrically connected to the auxiliary drive assembly 11, multiple actuators and the emergency drive assembly 13 to control the working states of the auxiliary drive assembly 11, multiple actuators and the emergency drive assembly 13. During the driving process of the electric vehicle, if the auxiliary drive assembly 11 or the high-voltage system of the electric vehicle is abnormally powered, causing the auxiliary drive assembly 11 to lose its power source, the controller 14 controls the emergency drive assembly 13 to connect with the auxiliary drive assembly 11, so as to use the power of the drive system 23 to drive the auxiliary drive assembly 11 to continue to operate. Among them, when the high-voltage system of the electric vehicle is abnormally powered, the drive system 23 also loses its power source. At this time, the inertial kinetic energy of the electric vehicle drives the drive system 23 to operate, and then transmits power to the auxiliary drive assembly 11 through the emergency drive assembly 13 to support the operation of the actuators until the kinetic energy of the electric vehicle is exhausted and stops moving.

[0059] The electric vehicle auxiliary system 1 in this embodiment can realize the integrated setting of the auxiliary system, simplify the structure and connection of the auxiliary system of the electric vehicle, and is conducive to reducing space occupation, energy consumption and use cost. At the same time, when the auxiliary drive component 11 of the electric vehicle is abnormally powered or the high-voltage system of the electric vehicle is abnormally powered, the emergency drive component 13 can continue to provide emergency power to various functional systems of the electric vehicle, so that the electric vehicle can continue to travel for a period of time for emergency avoidance, which is conducive to reducing the possibility of accidents and reducing safety hazards.

[0060] Embodiment 2

[0061] The electric vehicle auxiliary system 1 provided in this embodiment is further improved on the basis of the first embodiment.

[0062] like Figure 2 As shown, the auxiliary drive assembly 11 includes an auxiliary motor 111 and a hydraulic motor 112. The auxiliary motor 111 is electrically connected to the power battery of the electric vehicle to obtain electrical energy through the power battery. The auxiliary motor 111 is a dual-output shaft motor, and the two output shafts are respectively arranged at both ends of the auxiliary motor 111 and can rotate synchronously. One output shaft of the auxiliary motor 111 forms the first output end of the auxiliary drive assembly 11, and the other output shaft is connected to the hydraulic motor 112. The hydraulic motor 112 is an input shaft motor, which is provided with an input shaft, an output shaft and a hydraulic input end. The input shaft of the hydraulic motor 112 is drivingly connected to the other output shaft of the auxiliary motor 111, and the output shaft of the hydraulic motor 112 forms the second output end of the auxiliary drive assembly 11.

[0063] The emergency drive assembly 13 has a hydraulic output end, which can be connected to the hydraulic input end of the hydraulic motor 112. When the auxiliary motor 111 or the high-voltage system of the electric vehicle is abnormally powered and causes the auxiliary motor 111 to lose its power source, the controller 14 controls the hydraulic output end of the emergency drive assembly 13 to be connected to the hydraulic input end of the hydraulic motor 112 to drive the hydraulic motor 112 to operate, and at the same time drive the auxiliary motor 111 to rotate, thereby outputting power to the actuator to support the actuator to continue working.

[0064] Embodiment 3

[0065] The electric vehicle auxiliary system 1 provided in this embodiment is further improved on the basis of the second embodiment. Figure 3 As shown, the actuator assembly 12 specifically includes a steering pump 121 , an air compressor 122 and a water pump 123 .

[0066] The steering pump 121 is connected to the steering system 24 of the electric vehicle, and the input end of the steering pump 121 is connected to the first output end to operate under the drive of the auxiliary motor 111, so that the steering system 24 of the electric vehicle can achieve power steering. The air compressor 122 is connected to the air supply system 25 of the electric vehicle, and is used to compress the gas in the air supply system 25 of the electric vehicle; the input end of the air compressor 122 is connected to the second output end to operate under the drive of the hydraulic motor. The water pump 123 is connected to the cooling system 26 of the electric vehicle, and is used to drive the flow of liquid in the cooling system 26; the water pump 123 is connected to the second output end to operate under the drive of the hydraulic motor. Among them, when the air compressor 122 and the water pump 123 have no working requirements, the unloading of the pressure air end output by the air compressor 122 and the self-circulation of the water flow of the water pump 123 can realize the no-load operation of the air compressor 122 and the water pump 123, and can maintain non-stop operation with very little energy consumption, thereby reducing energy consumption.

[0067] Embodiment 4

[0068] The electric vehicle auxiliary system 1 provided in this embodiment is further improved on the basis of the third embodiment.

[0069] like Figure 4As shown, the actuator assembly 12 also includes a first electromagnetic clutch 1241 and a second electromagnetic clutch 1242. The two ends of the first electromagnetic clutch 1241 are respectively connected to the output shaft of the hydraulic motor 112 and the input end of the air compressor 122; the first electromagnetic clutch 1241 is electrically connected to the controller 14 to perform a clutch operation according to the control instruction of the controller 14 to achieve the connection or disconnection between the air compressor 122 and the hydraulic motor 112. Similarly, the two ends of the second electromagnetic clutch 1242 are respectively connected to the output shaft of the hydraulic motor 112 and the input end of the water pump 123; the second electromagnetic clutch 1242 is electrically connected to the controller 14 to perform a clutch operation according to the control instruction of the controller 14 to achieve the connection or disconnection between the water pump 123 and the hydraulic motor 112.

[0070] The controller 14 controls the working state of the first electromagnetic clutch 1241 according to the control instructions of the electric vehicle corresponding to the air compressor 122, and controls the working state of the second electromagnetic clutch 1242 according to the control instructions of the electric vehicle corresponding to the water pump 123, so as to realize the control of the corresponding electromagnetic clutch engagement according to actual working needs. The operation of the air compressor 122 and the water pump 123 can be accurately controlled to cooperate with the operation of the air supply system 25 and the cooling system 26 of the electric vehicle, which is beneficial to saving energy.

[0071] Embodiment 5

[0072] The electric vehicle auxiliary system 1 provided in this embodiment is further improved on the basis of the third embodiment.

[0073] like Figure 5 As shown, the actuator assembly 12 further includes a first pulley 1245 , a second pulley 1246 , a third electromagnetic clutch 1243 and a fourth electromagnetic clutch 1244 .

[0074] The first pulley 1245 is connected to the output shaft of the hydraulic motor 112 through a transmission belt to realize belt transmission. The shaft end of the first pulley 1245 is connected to one end of the third electromagnetic clutch 1243, and the other end of the third electromagnetic clutch 1243 is connected to the input end of the air compressor 122, so that the first pulley 1245 and the air compressor 122 are connected or disconnected through the clutch operation of the third clutch, so that when the first pulley 1245 and the air compressor 122 are in a connected state, the air compressor 122 is driven, so that the air compressor 122 compresses the gas in the air supply system 25 of the electric vehicle. Among them, the third electromagnetic clutch 1243 is electrically connected to the controller 14, and the controller 14 can control the third electromagnetic clutch 1243 to connect or disconnect according to the control instruction corresponding to the air compressor 122.

[0075] The second pulley 1246 is connected to the output shaft of the hydraulic motor 112 through a transmission belt to realize belt transmission. The shaft end of the second pulley 1246 is connected to one end of the fourth electromagnetic clutch 1244, and the other end of the fourth electromagnetic clutch 1244 is connected to the input end of the water pump 123, so that the second pulley 1246 and the water pump 123 can be connected or disconnected through the clutch operation of the fourth electromagnetic clutch 1244, so that when the second pulley 1246 is connected to the water pump 123, the water pump 123 can be driven. The fourth electromagnetic clutch 1244 is electrically connected to the controller 14, and the controller 14 can control the fourth electromagnetic clutch 1244 to connect or disconnect according to the control instruction corresponding to the water pump 123.

[0076] In this embodiment, long-distance power transmission can be achieved through pulley transmission, and the distance between the actuator and the hydraulic motor 112 can be increased to facilitate adaptation to the assembly position in the electric vehicle.

[0077] Embodiment 6

[0078] The electric vehicle auxiliary system 1 provided in this embodiment is further improved on the basis of the second embodiment.

[0079] like Figure 6 As shown, the emergency component specifically includes a hydraulic pump 131 and a solenoid valve 132. The input end of the hydraulic pump 131 is transmission-connected to the drive system 23 of the electric vehicle so as to operate under the drive of the drive system 23. The output end of the hydraulic pump 131 is connected to the hydraulic input end of the hydraulic motor 112 through a hydraulic pipeline, and a solenoid valve 132 is provided in the hydraulic pipeline for opening or closing the hydraulic pipeline. When the solenoid valve 132 opens the hydraulic pipeline, the hydraulic pump 131 can output hydraulic pressure to the hydraulic motor 112 to drive the hydraulic motor 112 to operate. The controller 14 is electrically connected to the solenoid valve 132 to control the working state of the solenoid valve 132.

[0080] When the electric vehicle is in normal working state, the controller 14 controls the solenoid valve 132 to close the hydraulic pipeline, and the auxiliary drive assembly 11 provides power to the actuator assembly 12; when the auxiliary motor 111 or the high-voltage system of the electric vehicle is abnormally powered, the auxiliary motor 111 loses its power source. At this time, the controller 14 controls the solenoid valve 132 to conduct the hydraulic pipeline, and the hydraulic pump 131 outputs hydraulic pressure to the hydraulic motor 112 under the drive of the drive system 23, so that the auxiliary motor 111 rotates under the drive of the hydraulic motor 112 to support the actuator to continue working. If the electric vehicle is abnormally powered during driving, the emergency drive assembly 13 can be used to enable the electric vehicle to continue to drive normally for a period of time for emergency avoidance, which is conducive to reducing the possibility of accidents and reducing safety hazards. Among them, the hydraulic pump 131 can be connected to any device or component that can output torque in the drive system 23 of the electric vehicle, such as a drive motor, a transmission, a transmission shaft, a drive axle, and a wheel, and the purpose of using the kinetic energy of the whole vehicle to drive the hydraulic pump 131 to operate can be achieved.

[0081] Furthermore, an electromagnetic clutch may be provided between the hydraulic pump 131 and the drive system 23 to connect or disconnect the hydraulic pump 131 and the drive system 23 according to working requirements.

[0082] Embodiment 7

[0083] In this embodiment, an electric vehicle auxiliary system 1 is provided, which is used for an electric vehicle and includes an auxiliary drive component 11, an actuator component 12, an emergency drive component 13 and a controller 14. The auxiliary drive component 11 is used to provide power to the electric vehicle auxiliary system 1 when the electric vehicle is in a normal working state, and the emergency drive component 13 is used to provide emergency power to the electric vehicle auxiliary system 1 when the electric vehicle is in an abnormal state.

[0084] like Figure 7 As shown, the auxiliary drive assembly 11 obtains electric energy by being electrically connected to the power battery 22 of the electric vehicle. The actuator assembly 12 includes a plurality of actuators, which are respectively connected to corresponding functional systems in the electric vehicle to perform corresponding functions. The actuator is connected to the output end of the auxiliary drive assembly 11, so that the operation of the auxiliary drive assembly 11 provides driving force for the actuator, drives the actuator to work, and enables the corresponding functional system in the electric vehicle to operate.

[0085] The auxiliary drive assembly 11 includes an auxiliary motor 111 and a hydraulic motor 112. The auxiliary motor 111 is electrically connected to the power battery 22 of the electric vehicle to obtain electrical energy through the power battery 22. The auxiliary motor 111 is a dual-output shaft motor, and the two output shafts are respectively arranged at both ends of the auxiliary motor 111 and can rotate synchronously. One output shaft of the auxiliary motor 111 forms the first output end of the auxiliary drive assembly 11, and the other output shaft is connected to the hydraulic motor 112. The hydraulic motor 112 is an input shaft motor, which is provided with an input shaft, an output shaft and a hydraulic input end. The input shaft of the hydraulic motor 112 is drivingly connected to the other output shaft of the auxiliary motor 111, and the output shaft of the hydraulic motor 112 forms the second output end of the auxiliary drive assembly 11.

[0086] The actuator assembly 12 specifically includes a steering pump 121, an air compressor 122, a water pump 123, a first electromagnetic clutch 1241 and a second electromagnetic clutch 1242. The steering pump 121 is connected to the steering system 24 of the electric vehicle, and the input end of the steering pump 121 is connected to the first output end to operate under the drive of the auxiliary motor 111, so that the steering system 24 of the electric vehicle can achieve power steering. The air compressor 122 is connected to the air supply system 25 of the electric vehicle, and the air compressor 122 is used to compress the gas in the air supply system 25 of the electric vehicle. The water pump 123 is connected to the cooling system 26 of the electric vehicle, and is used to drive the flow of liquid in the cooling system 26. The two ends of the first electromagnetic clutch 1241 are respectively connected to the output shaft of the hydraulic motor 112 and the input end of the air compressor 122; the two ends of the second electromagnetic clutch 1242 are respectively connected to the output shaft of the hydraulic motor 112 and the input end of the water pump 123; the controller 14 is electrically connected to the first electromagnetic clutch 1241 and the second electromagnetic clutch 1242 to control the working state of the first electromagnetic clutch 1241 and the second electromagnetic clutch 1242 so as to connect or disconnect the air compressor 122 and / or the water pump 123 with the output shaft of the hydraulic motor 112.

[0087] The emergency component specifically includes a hydraulic pump 131 and a solenoid valve 132. The input end of the hydraulic pump 131 is connected to the drive system 23 of the electric vehicle in a transmission manner so as to operate under the drive of the drive system 23. The output end of the hydraulic pump 131 is connected to the hydraulic input end of the hydraulic motor 112 through a hydraulic pipeline, and a solenoid valve 132 is provided in the hydraulic pipeline for opening or closing the hydraulic pipeline. When the solenoid valve 132 opens the hydraulic pipeline, the hydraulic pump 131 can output hydraulic pressure to the hydraulic motor 112 to drive the hydraulic motor 112 to operate. The controller 14 is electrically connected to the solenoid valve 132 to control the working state of the solenoid valve 132. Among them, the hydraulic pump 131 can be connected to any device or component that can output torque in the drive system 23 of the electric vehicle, such as a drive motor, a transmission, a transmission shaft, a drive axle, and a wheel, so as to achieve the purpose of using the kinetic energy of the whole vehicle to drive the hydraulic pump 131 to operate.

[0088] When the electric vehicle is in normal working condition, the controller 14 controls the solenoid valve 132 to close the hydraulic pipeline, so that the hydraulic pump 131 is in a disconnected state with the hydraulic motor 112. At this time, the auxiliary drive component 11 provides power for the actuator; when the auxiliary motor 111 or the high-voltage system of the electric vehicle is abnormally powered, the auxiliary motor 111 loses its power source. At this time, the controller 14 controls the solenoid valve 132 to connect the hydraulic pipeline, and the hydraulic pump 131 outputs hydraulic pressure to the hydraulic motor 112 under the drive of the drive system 23, so that the auxiliary motor 111 rotates under the drive of the hydraulic motor 112 to support the actuator to continue working.

[0089] The electric vehicle auxiliary system 1 in this embodiment can realize the integrated setting of the auxiliary system, simplify the structure and connection of the auxiliary system of the electric vehicle, and is conducive to reducing space occupation, energy consumption and use cost. At the same time, when the auxiliary drive component 11 of the electric vehicle is abnormally powered or the high-voltage system of the electric vehicle is abnormally powered, the emergency drive component 13 can continue to provide emergency power to various functional systems of the electric vehicle, so that the electric vehicle can continue to travel for a period of time for emergency avoidance, which is conducive to reducing the possibility of accidents and reducing safety hazards.

[0090] Embodiment 8

[0091] This embodiment provides an electric vehicle 2, such as Figure 8 As shown, the electric vehicle 2 includes a vehicle body 21, a power battery 22, a driving system 23 and the electric vehicle auxiliary system 1 in any of the above embodiments.

[0092] The power battery 22 is arranged in the vehicle body 21, and is used to supply the electric energy required for the vehicle body 21 to travel. The drive system 23 is electrically connected to the power battery 22, and obtains electric energy through the power battery 22; the drive system 23 is transmission-connected to the travel system of the vehicle body 21 to drive the vehicle body 21 to travel. The electric vehicle auxiliary system 1 is arranged in the vehicle body 21, and the auxiliary drive component 11 in the electric vehicle auxiliary system 1 is electrically connected to the power battery 22 to obtain electric energy through the power battery 22 to drive the actuator to operate. The emergency drive component 13 in the electric vehicle auxiliary system 1 is transmission-connected to the drive system 23, so that when the auxiliary drive component 11 is abnormally powered or the high-voltage system of the electric vehicle 2 is abnormally powered, resulting in the auxiliary drive component 11 losing the power source, the emergency drive component 13 obtains power from the drive system 23, and outputs power to the auxiliary drive component 11 to support the actuator to continue to work. If the above abnormal situation occurs during the driving process of the electric vehicle 2, the emergency drive component 13 can be used to allow the electric vehicle 2 to continue to travel normally for a period of time for emergency avoidance, thereby reducing the possibility of accidents and improving the safety performance of the electric vehicle 2.

[0093] Among them, the emergency drive component 13 can be connected to any device or component that can output torque in the drive system 23 of the electric vehicle 2, such as a drive motor, a transmission, a drive shaft, a drive axle, and a wheel, so as to achieve the purpose of using the kinetic energy of the entire vehicle to drive the emergency drive component 13 to operate.

[0094] Furthermore, the electric vehicle 2 is an electric mixer truck.

[0095] Furthermore, the controller 14 in the electric vehicle auxiliary system 1 is a whole vehicle controller 14 provided by the electric vehicle 2, which can realize the integration of the controller 14, and is conducive to simplifying the connection and reducing the equipment cost.

[0096] In addition, the electric vehicle 2 in this embodiment also has all the technical effects of the electric vehicle auxiliary system 1 in any of the above embodiments, which will not be repeated here.

[0097] Embodiment 9

[0098] This embodiment provides an electric vehicle 2, which is further improved on the basis of the eighth embodiment.

[0099] like Fig. 9 As shown, the electric vehicle auxiliary system 1 includes a steering pump 121, an air compressor 122 and a water pump 123, and the electric vehicle 2 also includes a steering system 24, a heat dissipation system 26 and an air supply system 25. The input end of the steering pump 121 is connected to the output end of the auxiliary drive component 11, and the output end of the steering pump 121 is connected to the steering system 24, so as to obtain power through the auxiliary drive component 11 and enable the steering system 24 to achieve power steering. The input end of the air compressor 122 is connected to the output end of the auxiliary drive component 11 through an electromagnetic clutch, and the air compressor 122 is connected to the air supply system 25 through a pipeline to pressurize the air in the air supply system 25 to form a high-pressure gas; the electromagnetic clutch connects or disconnects the air compressor 122 with the output end of the auxiliary drive component 11 through its own clutch, so as to connect according to work needs. The water pump 123 is arranged in the pipeline of the heat dissipation system 26, and the water pump 123 is connected to the output end of the auxiliary drive component 11 through an electromagnetic clutch to work under the drive of the auxiliary drive component 11, and drives the liquid in the pipeline to flow, so as to achieve heat dissipation by using the flow of the liquid. The electromagnetic clutch connects or disconnects the water pump with the output end of the auxiliary drive assembly 11 according to the working requirements of the water pump.

[0100] Embodiment 10

[0101] This embodiment provides an electric vehicle auxiliary control method, which is used in any one of the electric vehicle auxiliary systems in the above-mentioned embodiments 2 to 7. Fig.10 As shown, including:

[0102] Step S100: receiving a start signal corresponding to an electric vehicle auxiliary system;

[0103] Step S200: controlling the auxiliary motor to run according to the start signal;

[0104] Step S300: Control the emergency drive assembly and the hydraulic motor to be in a disconnected state.

[0105] In this embodiment, when a start signal corresponding to the electric vehicle auxiliary system is received, the auxiliary motor is controlled to operate according to the start signal through step S200, and the hydraulic motor can be driven to operate through the auxiliary motor, and power is output to the actuator to drive the actuator to operate, so that the corresponding functional system in the electric vehicle can operate. Through step S300, the emergency drive component is controlled to be in a disconnected state from the hydraulic motor, so that when the electric vehicle is in normal working state, the hydraulic motor only obtains power through the auxiliary motor to reduce energy consumption and improve driving efficiency. At the same time, the emergency drive component is used as a backup power source for emergency use in emergency situations.

[0106] Embodiment 11

[0107] In this embodiment, an electric vehicle auxiliary control method is provided, which is used in any one of the electric vehicle auxiliary systems in the above-mentioned embodiments 2 to 7, and the emergency drive component includes a hydraulic pump and a solenoid valve. The input end of the hydraulic pump is connected to the driving system of the electric vehicle to obtain power; the output end of the hydraulic pump is connected to the hydraulic input end of the hydraulic motor through a hydraulic pipeline, wherein a solenoid valve is provided in the hydraulic pipeline to open or close the hydraulic pipeline. Fig.11 As shown, the electric vehicle auxiliary control method includes:

[0108] Step S100: receiving a start signal corresponding to an electric vehicle auxiliary system;

[0109] Step S200: controlling the auxiliary motor to run according to the start signal;

[0110] Step S300: Control the emergency drive assembly and the hydraulic motor to be in a disconnected state;

[0111] Step S410: acquiring a power-on state signal of the auxiliary motor and a power-on state signal of the high-voltage system of the electric vehicle;

[0112] Step S420: determine whether the power-on state of the auxiliary motor or the high-voltage system of the electric vehicle is abnormal, and generate a determination result; if the determination result is yes, execute step S430; if the determination result is no, execute step S440;

[0113] Step S430: Control the solenoid valve to conduct the hydraulic pipeline, so that the hydraulic pump drives the hydraulic motor to operate;

[0114] Step S440: Control the solenoid valve to close the hydraulic pipeline, so that the hydraulic pump is disconnected from the hydraulic motor.

[0115] In this embodiment, through step S410 and step S420, the power-on state signal of the auxiliary motor and the power-on state signal of the high-voltage system of the electric vehicle are obtained, and it is judged whether the power-on state of the auxiliary motor or the high-voltage system of the electric vehicle is abnormal, so as to determine whether the auxiliary system of the electric vehicle is in a normal working state, and generate a judgment result to provide a basis for whether to start the emergency drive component in the subsequent step. If the judgment result is yes, through step S430, the solenoid valve is controlled to conduct the hydraulic pipeline so that the output end of the hydraulic pump is connected to the input end of the hydraulic motor, the emergency drive state is started, and the power of the drive system is used to drive the hydraulic motor to continue to operate, and the actuator is supported to continue to maintain the working state. If the judgment result is no, it means that the auxiliary system of the electric vehicle is in a normal working state and there is no need to start the emergency state. At this time, through step S440, the solenoid valve is controlled to close the hydraulic pipeline, so that the hydraulic pump is disconnected from the hydraulic motor, and the auxiliary system of the electric vehicle drives the actuator to work through the auxiliary drive system to reduce energy consumption.

[0116] The electric vehicle auxiliary control method in this embodiment can enable the electric vehicle to continue to run normally for a period of time when the auxiliary motor or the high-voltage system is abnormally powered while the electric vehicle is driving, so as to facilitate emergency avoidance. In particular, when the above abnormal conditions occur during high-speed driving of the electric vehicle, the possibility of accidents can be effectively reduced, which is conducive to reducing safety hazards.

[0117] The above describes the technical solution of the present invention in detail in combination with the accompanying drawings, realizes the integrated setting of the auxiliary system, simplifies the structure and connection of the auxiliary system of the electric vehicle, and is conducive to reducing space occupation, reducing energy consumption and use costs. At the same time, when the auxiliary drive component of the electric vehicle is abnormally powered or the high-voltage system of the electric vehicle is abnormally powered, the emergency drive component can continue to provide emergency power to various functional systems of the electric vehicle, so that the electric vehicle can continue to travel for a period of time, which can be used for emergency avoidance, which is conducive to reducing the possibility of accidents and reducing safety hazards.

[0118] In the present invention, it can be understood that any process or method description in the flowchart or otherwise described herein can be understood to represent a module, fragment or portion of a code including one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations, in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present invention belong.

[0119] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or otherwise processing in a suitable manner if necessary, and then stored in a computer memory.

[0120] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0121] A person of ordinary skill in the art may understand that all or part of the steps of the method for implementing the above-mentioned embodiment may be completed by instructing the relevant hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one of the steps of the method embodiment or a combination thereof.

[0122] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0123] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0124] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric vehicle auxiliary system (1), characterized in that: include: An auxiliary drive assembly (11) is electrically connected to a power battery of the electric vehicle to obtain electrical energy; an actuator assembly (12), comprising a plurality of actuators, wherein the plurality of actuators are connected to an output end of the auxiliary drive assembly (11) and are driven by the auxiliary drive assembly (11) to operate corresponding functional systems in the electric vehicle; An emergency drive component (13) is connected to the drive system of the electric vehicle in a transmission manner to obtain power, and the emergency drive component (13) can be connected to or disconnected from the auxiliary drive component (11); A controller (14) is electrically connected to the auxiliary drive assembly (11), the plurality of actuators and the emergency drive assembly (13) to control the working states of the auxiliary drive assembly (11), the plurality of actuators and the emergency drive assembly (13), and when the auxiliary drive assembly (11) or the high voltage system of the electric vehicle is abnormally powered, controls the emergency drive assembly (13) to be connected to the auxiliary drive assembly (11) to output power to the auxiliary drive assembly (11).

2. The electric vehicle auxiliary system (1) according to claim 1, characterized in that: The auxiliary drive assembly (11) comprises: An auxiliary motor (111), wherein two output shafts are respectively provided at two ends of the auxiliary motor (111), and one of the output shafts forms a first output end of the auxiliary drive assembly (11); a hydraulic motor (112), the hydraulic motor (112) being provided with an input shaft, an output shaft and a hydraulic input end, the input shaft of the hydraulic motor (112) being drivingly connected to another output shaft of the auxiliary motor (111), the output shaft of the hydraulic motor (112) forming a second output end of the auxiliary drive assembly (11), The emergency drive component (13) has a hydraulic output end. When the auxiliary motor (111) or the high-voltage system of the electric vehicle is abnormally powered, the controller (14) controls the hydraulic output end of the emergency drive component (13) to be connected to the hydraulic input end of the hydraulic motor (112) to drive the hydraulic motor (112) to operate.

3. The electric vehicle auxiliary system (1) according to claim 2, characterized in that: The actuator assembly (12) specifically comprises: A steering pump (121), connected to the first output end, the steering pump (121) being used to drive a steering system of the electric vehicle to achieve power steering; an air compressor (122), connected to the second output end, and used for compressing gas in the air supply system of the electric vehicle; a water pump (123), connected to the second output end, for driving the flow of liquid in the cooling system of the electric vehicle, The controller (14) is electrically connected to the steering pump (121), the air compressor (122) and the water pump (123) to control the working states of the steering pump (121), the air compressor (122) and the water pump (123).

4. The electric vehicle auxiliary system (1) according to claim 3, characterized in that: The actuator assembly (12) further comprises: a first electromagnetic clutch (1241), wherein two ends of the first electromagnetic clutch (1241) are respectively connected to the output shaft of the hydraulic motor (112) and the input end of the air compressor (122), so that the output shaft of the hydraulic motor (112) is connected to or disconnected from the input end of the air compressor (122); a second electromagnetic clutch (1242), wherein two ends of the second electromagnetic clutch (1242) are respectively connected to the output shaft of the hydraulic motor (112) and the input end of the water pump (123), so that the output shaft of the hydraulic motor (112) is connected to or disconnected from the input end of the water pump (123); The controller (14) is electrically connected to the first electromagnetic clutch (1241) and the second electromagnetic clutch (1242) to respectively control the working states of the first electromagnetic clutch (1241) and the second electromagnetic clutch (1242).

5. The electric vehicle auxiliary system (1) according to claim 3, characterized in that: The actuator assembly (12) further comprises: A first pulley (1245) connected to an output shaft of the hydraulic motor (112) via a transmission belt; a third electromagnetic clutch (1243), wherein two ends of the third electromagnetic clutch (1243) are respectively connected to the first pulley (1245) and the input end of the air compressor (122), so that the first pulley (1245) is connected to or disconnected from the input end of the air compressor (122); A second pulley (1246) connected to the output shaft of the hydraulic motor (112) via a transmission belt; a fourth electromagnetic clutch (1244), wherein both ends of the fourth electromagnetic clutch (1244) are respectively connected to the second pulley (1246) and the input end of the water pump (123), so that the second pulley (1246) is connected to or disconnected from the input end of the water pump (123); The controller (14) is electrically connected to the third electromagnetic clutch (1243) and the fourth electromagnetic clutch (1244) to respectively control the working states of the third electromagnetic clutch (1243) and the fourth electromagnetic clutch (1244).

6. The electric vehicle auxiliary system (1) according to claim 2, characterized in that: The emergency drive assembly (13) comprises: A hydraulic pump (131), wherein an input end of the hydraulic pump (131) is transmission-connected to a drive system of the electric vehicle, and an output end of the hydraulic pump (131) is connected to a hydraulic input end of the hydraulic motor (112) via a hydraulic pipeline; A solenoid valve (132) is provided in the hydraulic pipeline. The controller (14) is electrically connected to the solenoid valve (132) to control the solenoid valve (132) to open or close the hydraulic pipeline, and when the auxiliary motor (111) or the high-voltage system of the electric vehicle is in an abnormal power-on state, the solenoid valve (132) is controlled to open the hydraulic pipeline.

7. An electric vehicle (2), characterized in that: include Vehicle body (21); A power battery (22) is arranged in the vehicle body (21); A driving system, electrically connected to the power battery (22), and used for driving the vehicle body (21); The electric vehicle auxiliary system (1) as described in any one of claims 1 to 6 is arranged in the vehicle body (21), the auxiliary drive component (11) in the electric vehicle auxiliary system (1) is electrically connected to the power battery (22), and the emergency drive component (13) in the electric vehicle auxiliary system (1) is transmission-connected to the drive system.

8. The electric vehicle (2) according to claim 7, characterized in that: The electric vehicle (2) is an electric mixer truck; and / or The controller (14) in the electric vehicle auxiliary system (1) is a whole vehicle controller provided by the electric vehicle (2).

9. An electric vehicle auxiliary control method, used in the electric vehicle auxiliary system according to any one of claims 2 to 6, characterized in that: The electric vehicle auxiliary control method comprises: Step S100: receiving a start signal corresponding to the electric vehicle auxiliary system; Step S200: controlling the auxiliary motor to run according to the start signal; Step S300: Control the emergency drive assembly and the hydraulic motor to be in a disconnected state.

10. The electric vehicle auxiliary control method according to claim 9, characterized in that: The emergency drive assembly includes a hydraulic pump and a solenoid valve, the input end of the hydraulic pump is transmission-connected to the drive system of the electric vehicle, the output end of the hydraulic pump is connected to the hydraulic input end of the hydraulic motor through a hydraulic pipeline, and the solenoid valve is arranged in the hydraulic pipeline. The electric vehicle auxiliary control method also includes: Step S410: acquiring a power-on status signal of the auxiliary motor and a power-on status signal of the high-voltage system of the electric vehicle; Step S420: determining whether the power-on state of the auxiliary motor or the high-voltage system of the electric vehicle is abnormal, and generating a determination result; If the judgment result is yes, executing step S430: controlling the solenoid valve to conduct the hydraulic pipeline so that the hydraulic pump drives the hydraulic motor to operate; If the judgment result is no, execute step S440: control the solenoid valve to close the hydraulic pipeline, so that the hydraulic pump is disconnected from the hydraulic motor.

Images