Hybrid system and working machine

Abstract

The utility model relates to the technical field of operation machinery discloses hybrid power system and operation machinery, this hybrid power system, including motor, is used for driving the hydraulic system work of operation machinery, energy storage device is used for providing power for motor, energy supply device is used for the power supply of energy storage device, or in the power supply of energy storage device simultaneously provides power for motor, range extender is used for the power supply of energy storage device, and provides power for motor, controller, controller is electrically connected with motor, energy storage device and range extender respectively, is used for obtaining the operation mode of operation machinery, and according to operation mode and the state of charge of energy storage device, to motor, energy storage device, energy supply device and range extender carry out control. The utility model can promote the continuous operation ability and operation experience of operation machinery under dynamic working condition.

Description

Technical Field

[0001] This utility model relates to the field of work machinery technology, specifically to a hybrid power system and work machinery. Background Technology

[0002] With the global energy shortage becoming increasingly severe and environmental awareness growing stronger, green energy has gained widespread recognition and high importance worldwide. Against this backdrop, hybrid power technology, as a transitional solution, has shown outstanding performance in reducing fossil fuel consumption and emissions. However, hybrid power systems in related technologies cannot meet the continuous operation requirements of machinery under dynamic conditions, thus affecting the operator's experience. Utility Model Content

[0003] This invention provides a hybrid power system and a working machine to solve the problem in related technologies that hybrid power systems cannot meet the continuous operation requirements of working machines under dynamic working conditions, thereby affecting the working experience.

[0004] In a first aspect, this utility model provides a hybrid power system, comprising: An electric motor is used to drive the hydraulic system of a work machine. Energy storage devices are used to power electric motors; Energy supply devices are used to replenish the power of energy storage devices, or to provide power to electric motors while replenishing the power of energy storage devices; Range extenders are used to replenish energy storage devices and provide power to electric motors; The controller is electrically connected to the motor, energy storage device and range extender respectively. It is used to obtain the operating mode of the machine and control the motor, energy storage device and power supply device and range extender according to the operating mode and the state of charge of the energy storage device.

[0005] The hybrid power system provided by this utility model optimizes the coordinated operation of the power supply device, range extender, and energy storage device in real time according to the working mode and the state of charge of the energy storage device through the scheduling of the controller. This ensures the stable output of hydraulic system power, effectively reduces fossil fuel consumption and emissions, and maximizes energy utilization efficiency during power replenishment and power supply. At the same time, it can enhance system reliability and response speed, avoid work interruption, and improve the continuous operation capability and operating experience of the machinery under dynamic working conditions.

[0006] In one alternative implementation, the range extender includes an engine, a generator, and an inverter. The output of the engine is connected to the input of the generator to drive the generator to generate electricity. The input of the inverter is connected to the output of the generator to convert the three-phase electricity output by the generator into direct current to power the energy storage device and to provide power to the motor.

[0007] In one optional embodiment, the power supply device includes a first power supply module, which includes: A DC charging interface is used to connect charging devices that provide DC power. A DC charger has its input end connected to a DC charging interface and its output end connected to an energy storage device. A controller is also connected to the DC charger and is used to control the DC charger to operate when a DC power supply device is connected to the DC charging interface, so that the DC power supply device can replenish the energy storage device.

[0008] In one optional embodiment, the power supply device further includes a second power supply module, which includes: AC charging interface, used to connect charging devices that provide AC power; The rotary mechanism includes an electric slip ring, the first connector of which is connected to an AC charging interface. An AC charger has its input terminal connected to the second connector of an electrical slip ring, and its output terminal connected to an energy storage device and a motor. A controller is also connected to the AC charger and is used to control the AC charger to operate when an AC charging device is connected to the AC charging interface, so that the AC charging device can provide power to the energy storage device and power the motor.

[0009] In one optional embodiment, the power supply device further includes a power supply mode selection unit, which includes: The mode selection switch is used to receive user operation commands to select the power supply mode; The signal conversion circuit, connected to the mode selection switch, is used to convert the selected mode signal into an electrical signal; The controller communication interface connects to the signal conversion circuit and the controller, and is used to transmit electrical signals to the controller so that the controller can control the operating status of the DC charger or AC charger according to the selected power supply mode.

[0010] In one alternative implementation, the hydraulic system includes: Hydraulic actuators are used to drive corresponding mechanical parts of operating machinery to perform on-vehicle operations. The main pump has its input end connected to the output end of the electric motor, and its first output end is connected to the hydraulic actuator.

[0011] In one alternative embodiment, the hydraulic system further includes: A hydraulic travel mechanism is used to drive the unloading movement of the operating machinery; The slewing mechanism includes a hydraulic slip ring. The first connector of the hydraulic slip ring is connected to the second output end of the main pump, and the second connector of the hydraulic slip ring is connected to the input end of the hydraulic travel mechanism.

[0012] In one alternative implementation, the controller is provided with a mode selection switch, which includes a pure electric mode switch, a range-extended mode switch, and an emergency mode switch.

[0013] In one alternative embodiment, the energy storage device is equipped with a state of charge (SCC) sensor, which is connected to a controller to send the SCC status of the energy storage device to the controller.

[0014] Secondly, this utility model provides a working machine, including the aforementioned hybrid power system for the vehicle body, wherein the hybrid power system provides driving power and working power for the vehicle body, and the hybrid power system is used for the operation of the aforementioned hybrid power system control method. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a hybrid power system according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the working machinery according to an embodiment of the present utility model. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] It is understood that before using the technical solutions disclosed in the various embodiments of this utility model, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in this utility model in an appropriate manner in accordance with relevant laws and regulations, and user authorization should be obtained.

[0019] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] The following is combined Figure 1 The following describes embodiments of the present invention.

[0021] According to an embodiment of the present invention, in one aspect, a hybrid power system is provided, comprising: An electric motor is used to drive the hydraulic system of a work machine. Energy storage devices are used to power electric motors; Energy supply devices are used to replenish the power of energy storage devices, or to provide power to electric motors while replenishing the power of energy storage devices; Range extenders are used to replenish energy storage devices and provide power to electric motors; The controller is electrically connected to the motor, energy storage device and range extender respectively. It is used to obtain the operating mode of the machine and control the motor, energy storage device and power supply device and range extender according to the operating mode and the state of charge of the energy storage device.

[0022] In one optional implementation, the controller is provided with a mode selection switch, which includes a pure electric mode switch, a range extender mode switch, and an emergency mode switch. The pure electric mode switch, range extender mode switch, and emergency mode switch can be mechanical switches or virtual switches.

[0023] In one optional implementation, the energy storage device is equipped with a state of charge (SCC) sensor connected to a controller to transmit the SCC information from the energy storage device to the controller. The SCC sensor can be a voltage sensor, a current sensor, or an integrated sensor module, monitoring changes in the charge state of the energy storage device in real time and feeding the data back to the controller. Based on the received SCC information and the current operating mode of the machinery, the controller prioritizes the energy storage device for power supply in pure electric mode. When the SCC drops to a preset threshold, the range extender is activated to provide supplemental power or direct power supply. In emergency mode, the controller can ignore SCC limitations and forcibly activate the range extender to maintain stable system operation.

[0024] In one specific implementation, when the hybrid power system is operating, the controller can first obtain the operating mode of the working machinery. If the operating mode is pure electric mode and the state of charge (SBC) of the energy storage device is less than a first threshold, then the energy storage device is recharged through the power supply device, or power is supplied to the motor while recharging the energy storage device. If the operating mode is pure electric mode and the SBC of the energy storage device is greater than or equal to the first threshold, then power is supplied to the motor through the energy storage device. If the operating mode is range-extended mode and the SBC of the energy storage device is less than a second threshold, then the range extender recharges the energy storage device while supplying power to the motor. When the SBC of the energy storage device is greater than or equal to a third threshold, the range extender stops recharging and supplying power, and the operating mode is switched to pure electric mode, where the second threshold is less than the third threshold. If the operating mode is emergency mode and the state of charge of the energy storage device is less than the fourth threshold, the range extender will replenish the energy storage device and provide power to the motor at the same time. When the state of charge of the energy storage device is greater than the fifth threshold or the replenishment time reaches the target time, the replenishment and power supply of the range extender will stop, and the energy storage device will provide power to the motor at the same time. The fourth threshold is less than the fifth threshold. If the operating mode is emergency mode and the energy storage device is faulty, the range extender will provide power to the motor.

[0025] For example, in actual operation scenarios, when the operating machinery is a crane, the controller can implement control according to its operating mode. For instance, when performing light-load hoisting in pure electric mode, if the state of charge of the energy storage device drops to 20%, the controller will activate the power supply device (such as an external power interface) to replenish the power to the energy storage device; when the state of charge rises back to 85%, the power supply device is stopped, and the energy storage device independently drives the motor to operate the winch and luffing hydraulic system. When performing heavy-load hoisting in range-extended mode, if the state of charge drops to 10% due to continuous high power output, the controller immediately starts the range extender, which directly supplies power to the motor while replenishing the energy storage device; when the state of charge rises to 80%, the controller automatically stops the range extender, switches the mode back to pure electric mode, and maintains power supply to the energy storage device. In emergency mode, if a sudden strong wind requires emergency hook retraction, and the state of charge drops below 5% due to power consumption by the auxiliary system, the controller prioritizes controlling the full power output of the range extender, while simultaneously replenishing power to the energy storage device and supplying power to the motor. If the replenishment continues for 15 minutes or the state of charge reaches 30%, the range extender operation is terminated, and the energy storage device is switched to power supply to ensure stable hook retraction. If an abnormal output fault of the energy storage device is detected, the range extender directly drives the motor to maintain critical winch braking.

[0026] As another example, in a real-world operation scenario, if the machinery is operating in pure electric mode and, during hoisting operations, the state of charge (SOC) of the energy storage device drops below a first threshold (e.g., 20%), while the power supply device is in AC power supply mode, the controller monitors the load signal of the hydraulic system in real time and sets a load threshold of 60kW. If the load demand is lower than the load threshold, the power supply device is prioritized to directly drive the motor, and the energy storage device is simultaneously replenished with power to maintain system efficiency. Conversely, when the load demand suddenly increases to 80kW, the controller coordinates the energy storage device to supplement additional power, for example, by increasing the power output ratio of the energy storage device to 40%, ensuring that the peak power demand of the motor is met. Furthermore, during the replenishment process, if the SOC recovers to above the first threshold (e.g., 25%), the controller automatically switches to a power supply mode solely powered by the energy storage device, reducing the intervention of the power supply device. Simultaneously, for frequent fluctuations in the hydraulic system load (e.g., ±15% variation), the controller dynamically adjusts the power distribution ratio based on a feedback mechanism, for example, increasing the contribution of the energy storage device to 50% during the load increase phase and reducing it to 20% during the load decrease phase, ensuring stable system operation.

[0027] If the second threshold is 20% and the third threshold is 80%, in range-extended mode, when the state of charge (SOC) is less than 20%, the range extender simultaneously charges the energy storage device and powers the electric motor using a dynamic power output ratio. For example, during stable load phases, the range extender output ratio is maintained within the range of 40%-60%. If the load suddenly increases to over 50kW, the range extender's contribution is increased to over 70% to meet peak demand. Simultaneously, SOC changes are continuously monitored. When the SOC rises to near 80%, the range extender's recharging and power supply operations are automatically stopped, and the operating mode is immediately switched to pure electric mode. Furthermore, based on the fluctuating characteristics of the hydraulic system load, the range extender output ratio is preferentially increased to 65% during load increases and reduced to 35% during load decreases. This closed-loop feedback mechanism optimizes energy distribution, avoids overcharging, and maintains system efficiency and stability.

[0028] If the fourth threshold can be set to 10%, the fifth threshold to 60%, and the target duration to 5 minutes, in emergency mode, when the state of charge (SBC) is less than 10%, the range extender simultaneously charges the energy storage device and powers the motor at a dynamic power output ratio. For example, during stable load phases, the range extender output ratio is maintained within the range of 50%-70%; if the hydraulic system load suddenly increases to over 60kW, the range extender contribution is increased to over 85% to meet peak demand. Simultaneously, changes in SBC and recharging duration are monitored in real time. When the SBC rises to 60% or recharging continues for 5 minutes, the range extender's recharging and power supply operations are automatically stopped, and the system immediately switches to independent power supply mode for the energy storage device. Furthermore, based on the hydraulic load fluctuation characteristics, the range extender output ratio is preferentially increased to 75% during load increases and reduced to 45% during load decreases. Power allocation is dynamically optimized through a closed-loop feedback mechanism to prevent overcharging and ensure stable system operation. If the energy storage device fails, the range extender continuously powers the motor at 100% output until the fault is resolved or the system shuts down.

[0029] The hybrid power system provided by this utility model optimizes the coordinated operation of the power supply device, range extender, and energy storage device in real time according to the working mode and the state of charge of the energy storage device through the scheduling of the controller. This ensures the stable output of hydraulic system power, effectively reduces fossil fuel consumption and emissions, and maximizes energy utilization efficiency during power replenishment and power supply. At the same time, it can enhance system reliability and response speed, avoid work interruption, and improve the continuous operation capability and operating experience of the machinery under dynamic working conditions.

[0030] In one alternative implementation, the range extender includes an engine, a generator, and an inverter. The output of the engine is connected to the input of the generator to drive the generator to generate electricity. The input of the inverter is connected to the output of the generator to convert the three-phase electricity output by the generator into direct current to power the energy storage device and to provide power to the motor.

[0031] In actual operation, when the controller detects that the system has entered emergency mode and the state of charge (SBC) is below 5%, it immediately instructs the range extender to output full power. The engine drives the generator to produce three-phase electricity, which is then inverted into DC power by the inverter and prioritizes powering the energy storage device while simultaneously providing power to the electric motor. If the power replenishment continues for 15 minutes or the SBC recovers to 30%, the controller automatically switches to an independent power supply mode for the energy storage device, terminating the range extender to save fuel. If an abnormal output fault is detected in the energy storage device, the controller will bypass the energy storage device and directly drive the electric motor through the range extender to maintain the critical winch braking function, ensuring system stability and continuity.

[0032] In one optional embodiment, the power supply device includes a first power supply module, which includes: a DC charging interface for connecting a charging device that provides DC power; a DC charger, the input terminal of which is connected to the DC charging interface, and the output terminal of which is connected to the energy storage device. A controller is also connected to the DC charger and is used to control the DC charger to operate when the DC charging interface is connected to the charging device that provides DC power, so that the charging device provides DC power replenishes the energy storage device.

[0033] The DC charger includes a power conversion circuit and a charging control unit. The power conversion circuit regulates the voltage and current of the DC power input from the DC charging interface to meet the charging needs of the energy storage device. The charging control unit communicates with the controller and receives instructions from the controller to adjust charging parameters in real time, including charging voltage, charging current, and charging mode, to ensure the efficiency and safety of the charging process. At the same time, the DC charger also integrates overvoltage protection, overcurrent protection, and temperature monitoring modules. When an abnormality is detected, it automatically cuts off the charging circuit and sends a fault signal to the controller to achieve system redundancy protection.

[0034] In one optional embodiment, the power supply device further includes a second power supply module, which includes: an AC charging interface for connecting a charging device that provides AC power; a slewing mechanism including an electric slip ring, the first connector of which is connected to the AC charging interface; and an AC charger, the input end of which is connected to the second connector of the electric slip ring, and the output end of which is electrically connected to the energy storage device and the motor. The controller is also connected to the AC charger and is used to control the AC charger to operate when the AC charging interface is connected to the charging device that provides AC power, so that the charging device provides AC power to replenish the energy storage device and provide power to the motor.

[0035] The slip ring system comprises multiple concentrically arranged conductive rings and a brush assembly in elastic contact with them. The conductive rings are fixedly mounted on the rotating component of the slewing mechanism and electrically connected to the AC charging interface. The brush assembly is fixed to the stationary base of the slewing mechanism and maintains reliable contact with the conductive rings through elastic elements, ensuring uninterrupted AC power transmission to the AC charger during continuous rotation of the slewing mechanism. The AC charger includes a rectifier unit, a power factor correction circuit, and an isolated DC / DC converter module to convert the input AC power into DC power that meets the charging characteristics of the energy storage device and the drive requirements of the motor. The controller dynamically adjusts the AC charging power or triggers a protective shutdown by monitoring the slip ring operating temperature signal and abnormal status feedback from the insulation monitoring unit in real time. When an abnormal increase in slip ring contact resistance or insulation fault is detected, the controller immediately cuts off the AC charging circuit and activates the audible and visual alarm device.

[0036] In one optional embodiment, the power supply device further includes a power supply mode selection unit, which includes: a mode selection switch for receiving user operation instructions to select a power supply mode; a signal conversion circuit connected to the mode selection switch for converting the selected mode signal into an electrical signal; and a controller communication interface connected to the signal conversion circuit and the controller for transmitting the electrical signal to the controller so that the controller controls the operating state of the DC charger or AC charger according to the selected power supply mode.

[0037] The mode selection switch can be either a mechanical switch or a virtual switch. The signal conversion circuit includes a level conversion module and a signal shaping module, used to convert the mechanical contact signals or electronic switch signals generated by the mode selection switch into logic level signals recognizable by the controller, and output standard level signals to the controller communication interface. The level conversion module uses optocoupler isolation circuits to achieve electrical isolation between high and low voltage domains, while the signal shaping module uses Schmitt triggers to eliminate contact bounce interference and generate regular square wave pulses.

[0038] In one optional embodiment, the hydraulic system includes: a hydraulic actuator for driving corresponding mechanical parts of the operating machinery to perform on-vehicle operations; a main pump, the input end of which is connected to the output end of an electric motor, the first output end of which is connected to the hydraulic actuator, and the second output end of which is connected to the second joint of a hydraulic slip ring.

[0039] The hydraulic actuator includes a hydraulic cylinder, a hydraulic motor, and a control valve assembly. The hydraulic cylinder drives mechanical components to achieve linear displacement, the hydraulic motor drives rotating components, and the control valve assembly regulates flow and pressure via an electro-hydraulic proportional valve to ensure smooth and precise control during onboard operation. The output flow and pressure at the first output end of the main pump are regulated by an electro-hydraulic proportional control valve to match the real-time load requirements of the hydraulic actuator, thereby achieving efficient energy conversion and dynamic response during onboard operation of the machinery. Simultaneously, the controller, based on hydraulic system status signals (such as pressure, flow, and temperature) fed back from sensors, adjusts the drive parameters of the main pump to ensure smooth operation of the hydraulic actuator during startup, shutdown, and speed changes. Furthermore, in hybrid power mode, the main pump can work in conjunction with an electric motor. When the energy storage device has sufficient power, the electric motor is used to drive the main pump first; when the power is insufficient, it switches to AC charger power supply mode to optimize overall energy utilization and reduce hydraulic system energy consumption.

[0040] In one alternative embodiment, the hydraulic system further includes: a hydraulic travel mechanism for driving the machine to move off the platform; and a slewing mechanism, the slewing mechanism including a hydraulic slip ring, a first connector of the hydraulic slip ring being connected to a second output end of the main pump, and a second connector of the hydraulic slip ring being connected to an input end of the hydraulic travel mechanism.

[0041] The hydraulic travel mechanism includes a travel motor that converts hydraulic energy into mechanical rotational power; a reduction gearbox rigidly connected to the output shaft of the travel motor to match the torque and speed requirements of the off-vehicle travel device; and a multi-way control valve group whose inlet is connected to the second connector of the hydraulic slip ring. The flow rate and pressure direction to the travel motor are adjusted via electro-hydraulic proportional valves to achieve forward, backward, and speed control of the off-vehicle travel. The controller adjusts the opening of the multi-way control valve group based on the off-vehicle control lever commands and feedback signals from the travel speed sensor to ensure smooth start-stop and precise speed response. Simultaneously, the flow rate at the second output of the main pump is regulated by an independent proportional pressure-flow composite valve to adapt to dynamic load changes in the hydraulic travel mechanism under different road conditions.

[0042] Figure 2 This utility model provides a schematic diagram of the structure of a work machinery. The work machinery vehicle includes a vehicle body and a hybrid power system as described above, with the hybrid power system providing driving and working power to the vehicle body.

[0043] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A hybrid power system, characterized in that, The system includes; An electric motor is used to drive the hydraulic system of a work machine. An energy storage device for providing power to the electric motor; An energy supply device is used to replenish the energy storage device with electricity, or to provide power to the motor while replenishing the energy storage device with electricity; The range extender is used to replenish the energy storage device and provide power to the electric motor; The controller is electrically connected to the motor, the energy storage device, and the range extender, respectively, and is used to acquire the operating mode of the working machinery, and control the motor, the energy storage device, the power supply device, and the range extender according to the operating mode and the state of charge of the energy storage device.

2. The system according to claim 1, characterized in that, The range extender includes an engine, a generator, and an inverter. The output of the engine is connected to the input of the generator to drive the generator to generate electricity. The input of the inverter is connected to the output of the generator to convert the three-phase electricity output by the generator into direct current to supply power to the energy storage device and to provide power to the motor.

3. The system according to claim 1 or 2, characterized in that, The power supply device includes a first power supply module, the first power supply module comprising: A DC charging interface is used to connect charging devices that provide DC power. A DC charger, wherein the input terminal of the DC charger is connected to the DC charging interface, and the output terminal of the DC charger is connected to the energy storage device, wherein the controller is also connected to the DC charger and is used to control the DC charger to work when a charging device providing DC power is connected to the DC charging interface, so that the charging device providing DC power replenishes the energy storage device.

4. The system according to claim 3, characterized in that, The power supply device further includes a second power supply module, the second power supply module comprising: AC charging interface, used to connect charging devices that provide AC power; A slewing mechanism, the slewing mechanism including an electric slip ring, the first connector of the electric slip ring being connected to the AC charging interface; An AC charger is provided, wherein the input terminal of the AC charger is connected to the second connector of the slip ring, the output terminal of the AC charger is electrically connected to the energy storage device and the motor, and wherein the controller is also connected to the AC charger for controlling the AC charger to work when a charging device providing AC power is connected to the AC charging interface, so that the charging device providing AC power can replenish the energy storage device and provide power to the motor.

5. The system according to claim 4, characterized in that, The power supply device further includes a power supply mode selection unit, which includes: The mode selection switch is used to receive user operation commands to select the power supply mode; A signal conversion circuit, connected to the mode selection switch, is used to convert the selected mode signal into an electrical signal; A controller communication interface is connected to the signal conversion circuit and the controller, and is used to transmit the electrical signal to the controller so that the controller controls the working state of the DC charger or the AC charger according to the selected power supply mode.

6. The system according to claim 1, characterized in that, The hydraulic system includes: A hydraulic actuator is used to drive the corresponding mechanical parts of the operating machinery to perform on-vehicle operations. The main pump has its input end connected to the output end of the electric motor, and its first output end connected to the hydraulic actuator.

7. The system according to claim 6, characterized in that, The hydraulic system also includes: A hydraulic travel mechanism is used to drive the unloading movement of the operating machinery; A slewing mechanism, comprising a hydraulic slip ring, wherein a first connector of the hydraulic slip ring is connected to a second output end of the main pump, and a second connector of the hydraulic slip ring is connected to an input end of the hydraulic travel mechanism.

8. The system according to claim 1, characterized in that, The controller is equipped with a mode selection switch, which includes a pure electric mode switch, a range extender mode switch, and an emergency mode switch.

9. The system according to claim 1, characterized in that, The energy storage device is equipped with a state of charge (SCC) sensor, which is connected to the controller and is used to send the SCC status of the energy storage device to the controller.

10. A type of operating machinery, characterized in that, It includes a vehicle body and a system as described in any one of claims 1 to 9, wherein the vehicle body is provided with driving power and operating power by the system.

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