Pure electric working machine

Abstract

The utility model relates to the technical field of operation machinery, and discloses a pure electric operation machine, which comprises a lower vehicle, an energy storage device, a battery distribution unit, an all-in-one controller, an oil pump motor, a driving motor, a hydraulic oil pump and a walking mechanism, and the energy storage device, the battery distribution unit and the all-in-one controller are electrically connected in sequence. The all-in-one controller is electrically connected with the driving motor and the oil pump motor, the driving motor is connected with the walking mechanism, and the oil pump motor is connected with the hydraulic oil pump; and the upper vehicle comprises an upper vehicle operation mechanism which is connected with the hydraulic oil pump. The two motors are adopted to perform power driving on the operation machine, one motor is used for running, the other motor is used for operation, the working efficiency is effectively improved, the situation of failure of part of actions is not prone to being caused, a power take-off shaft does not need to be arranged on the motor, and the cost is reduced. And the problem that the power takeoff shaft is easy to break due to the fact that the pure electric crane provides power for the operation mechanism through the power takeoff shaft on the motor is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of work machinery technology, specifically to pure electric work machinery. Background Technology

[0002] With the rapid development of infrastructure, lifting machinery has become an indispensable part of various engineering operations. At the same time, environmental governance and energy consumption issues are receiving increasing attention, making the promotion of new energy development a major trend in the entire lifting machinery industry. Because pure electric vehicles play a very important role in energy conservation and environmental protection, pure electric cranes have a large market in cities.

[0003] Currently, traditional lifting machinery relies on an engine-driven hydraulic pump for power during operation. However, when operating on the crane, the engine's high power often prevents it from operating within its efficient range, resulting in wasted energy. Furthermore, prolonged engine operation generates significant pollution emissions and noise, negatively impacting the environment and the health of the driver.

[0004] To address this issue, cranes are currently mainly categorized into pure electric, plug-in hybrid, and hybrid types. Plug-in cranes require a stable power supply and have certain environmental requirements. Hybrid cranes still have an engine, offering some energy savings and environmental protection, but further environmental impact needs to be minimized. Pure electric cranes use a power take-off shaft on the motor to drive a hydraulic pump, providing energy for luffing, telescopic, slewing, hoisting, steering, and braking. However, the hydraulic pump generates a large impact torque upon startup, which puts significant stress on the power take-off shaft. Frequent start-stop operations cause the power take-off shaft to repeatedly bear high torque, leading to fatigue accumulation and ultimately fracture. Utility Model Content

[0005] In view of this, the present invention provides a pure electric operating machine to solve the problem that the power take-off shaft of a pure electric crane is prone to breakage when it provides power to the operating mechanism through the power take-off shaft on the motor.

[0006] This utility model provides a pure electric operating machine, including: a lower vehicle, comprising an energy storage device, a battery distribution unit, a multi-function controller, an oil pump motor, a drive motor, a hydraulic oil pump, and a traveling mechanism, wherein the energy storage device, the battery distribution unit, and the multi-function controller are electrically connected in sequence, the multi-function controller is electrically connected to the drive motor and the oil pump motor, the drive motor is connected to the traveling mechanism, and the oil pump motor is connected to the hydraulic oil pump; and an upper vehicle, comprising an upper vehicle operating mechanism, wherein the upper vehicle operating mechanism is connected to the hydraulic oil pump.

[0007] Beneficial effects: The energy storage device provides power to the drive motor through the battery distribution unit and the multi-function controller, which in turn powers the traveling mechanism. Furthermore, the energy storage device also provides power to the hydraulic pump motor through the battery distribution unit and the multi-function controller. The hydraulic pump motor then powers the upper working mechanism via a hydraulic pump. Using two motors to drive the machinery—one for travel and one for operation—effectively improves work efficiency and reduces the likelihood of partial malfunctions. It eliminates the need for a power take-off shaft on the motor, effectively solving the problem of power take-off shaft breakage that easily occurs in pure electric cranes when power is supplied to the working mechanism via the motor.

[0008] In one optional embodiment, the multi-function controller is a four-in-one controller integrating a high-voltage junction box, an air pump controller, a drive motor controller, and a DC-DC converter. The lower part also includes an oil pump motor controller, and the four-in-one controller is electrically connected to the oil pump motor through the oil pump motor controller; or, the multi-function controller is a five-in-one controller integrating a high-voltage junction box, an air pump controller, a drive motor controller, an oil pump motor controller, and a DC-DC converter.

[0009] Beneficial effects: The four-in-one controller adopts a modular design, which allows for the selection and combination of different functional modules according to actual needs; it has a high degree of integration, and through centralized control, it reduces intermediate links and improves the system's response speed and overall efficiency.

[0010] In one optional embodiment, the hydraulic pump includes a piston pump and a gear pump, and the upper working mechanism includes a luffing mechanism, a winch mechanism, a telescopic mechanism, and a slewing mechanism. The piston pump is connected to the luffing mechanism, the winch mechanism, and the telescopic mechanism through hydraulic lines, and the gear pump is connected to the slewing mechanism through hydraulic lines.

[0011] Beneficial effects: By powering several actuators with two pumps, integrating the two pumps into one unit, the high degree of integration can improve the reliability of the hydraulic system and reduce maintenance costs.

[0012] In one alternative embodiment, the vehicle also includes a brake cylinder, a filling valve, an accumulator, and a brake valve, with the plunger pump, filling valve, accumulator, brake valve, and brake cylinder connected in sequence.

[0013] Beneficial effects: The plunger pump, filling valve, accumulator, brake valve and brake cylinder form a hydraulic braking system. The hydraulic braking system can provide strong braking force to ensure that the vehicle can decelerate or stop quickly when driving at high speed or under heavy load.

[0014] In one alternative embodiment, the vehicle also includes outrigger cylinders, outrigger control valves, suspension cylinders, and suspension valves. A gear pump is connected to the outrigger cylinders via the outrigger control valves, and the gear pump is connected to the suspension cylinders via the suspension valves.

[0015] Beneficial effects: Gear pumps have a relatively simple structure, lower manufacturing costs, and are easier to maintain and repair.

[0016] In one alternative implementation, the vehicle also includes a battery, with the all-in-one controller electrically connected to the battery.

[0017] Beneficial effects: The DC-DC converter in the four-in-one controller converts high voltage to low voltage to charge the 24V battery, thereby enabling the 24V battery to provide power to the vehicle's low-voltage electrical system and ensure the normal operation of the low-voltage electrical system.

[0018] In one alternative embodiment, the vehicle also includes a transmission, a transmission controller, and a vehicle controller. The drive motor is connected to the walking mechanism via the transmission, the transmission controller is electrically connected to the transmission and the vehicle controller, and the vehicle controller and the transmission controller are electrically connected to the battery.

[0019] Beneficial effects: By controlling the transmission through the TCU, which manages and controls all operations of the transmission to ensure optimal vehicle performance under various driving conditions, the TCU receives signals from various sensors, calculates and sends commands to the actuators to achieve precise control of the transmission. Meanwhile, the VCU manages and controls the entire vehicle, optimizing power output and driving experience, and improving overall vehicle performance and reliability.

[0020] In one alternative implementation, the vehicle also includes a vehicle controller, which is electrically connected to the vehicle controller and the battery.

[0021] Beneficial effects: The onboard controller is mainly responsible for the control and safety protection of the working mechanism, ensuring efficient and safe operation; through the coordinated work of the onboard controller and the vehicle controller, vehicles and construction machinery can better adapt to various working environments and driving conditions, providing excellent performance and safety.

[0022] In one alternative implementation, the vehicle also includes an air conditioning compressor, which is electrically connected to the all-in-one controller.

[0023] Beneficial effects: After the air conditioning compressor is electrically connected to the VCU, it can achieve precise control of the compressor's working status, improving the comfort experience of drivers and passengers.

[0024] In one optional embodiment, the vehicle also includes an air filter, an electric air compressor, a dryer, an air tank, and a gear shifting mechanism connected in sequence. The gear shifting mechanism is connected to the transmission, and the electric air compressor is electrically connected to the multi-function controller.

[0025] Beneficial effects: The air filter, electric air compressor, dryer, air tank, and shift actuator form a pneumatic shift mechanism, which enables fast and reliable shifting. Attached Figure Description

[0026] 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.

[0027] Figure 1 This is a schematic diagram of the structure of a pure electric work machine according to an embodiment of the present utility model;

[0028] Figure 2 for Figure 1 The diagram shows the structure of the power system of a pure electric work machine.

[0029] Figure 3 for Figure 1 A schematic diagram of the oil pump motor architecture of a pure electric operating machine is shown.

[0030] Figure 4 for Figure 1 The diagram shows the power distribution of a plunger pump.

[0031] Figure 5 for Figure 1 The diagram shows the power distribution of the gear pump.

[0032] Figure 6 for Figure 1 The network topology diagram shown is for a pure electric work machine.

[0033] Figure 7 for Figure 1 The diagram shows the pneumatic circuit of a pure electric work machine.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Power battery; 2. Battery distribution unit; 3. All-in-one controller; 4. Oil pump motor; 5. Drive motor; 6. Storage battery; 7. Gearbox; 8. Gearbox controller; 9. Vehicle controller; 10. Onboard controller;

[0036] 11. Piston pump; 12. Gear pump;

[0037] 31. Air conditioning compressor; 32. Electric air compressor. Detailed Implementation

[0038] 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.

[0039] The following is combined with Figures 1 to 7 The following describes embodiments of the present invention.

[0040] According to an embodiment of this utility model, a pure electric work machine is provided, including: a lower vehicle and an upper vehicle. The lower vehicle includes an energy storage device, a battery distribution unit 2 (BDU), a multi-function controller 3, an oil pump motor 4, a drive motor 5, a hydraulic oil pump, and a walking mechanism. The energy storage device, battery distribution unit 2, and multi-function controller 3 are electrically connected in sequence. The multi-function controller 3 is electrically connected to the drive motor 5 and the oil pump motor 4. The drive motor 5 is connected to the walking mechanism, and the oil pump motor 4 is connected to the hydraulic oil pump. The upper vehicle includes an upper vehicle working mechanism, which is connected to the hydraulic oil pump.

[0041] In the pure electric work machinery of this embodiment, the energy storage device provides power to the drive motor 5 through the battery distribution unit 2 and the multi-function controller 3, and the drive motor 5 provides power to the traveling mechanism. In addition, the energy storage device provides power to the oil pump motor 4 through the battery distribution unit 2 and the multi-function controller 3. The oil pump motor 4 provides power to the upper working mechanism through the hydraulic oil pump. The use of two motors to drive the work machinery, one motor for traveling and one motor for working, effectively improves work efficiency and reduces the likelihood of partial failure of movement. It eliminates the need to install a power take-off shaft on the motor, effectively solving the problem that the power take-off shaft of pure electric cranes is prone to breakage when providing power to the working mechanism through the power take-off shaft on the motor.

[0042] In one embodiment, the multi-function controller 3 is a four-in-one controller integrating a high-voltage distribution unit (PDU), an air pump controller, a drive motor controller, and a DC-DC converter. It also includes an oil pump motor controller, and the four-in-one controller is electrically connected to the oil pump motor 4 via the oil pump motor controller. The four-in-one controller adopts a modular design, allowing for the selection and combination of different functional modules according to actual needs; it has a high degree of integration, reducing intermediate links through centralized control and improving the system's response speed and overall efficiency.

[0043] It should be noted that a DC-DC converter can be called a DCDC converter, and the English abbreviation for controller is MCU. An air pump controller can be called an air pump MCU, and an oil pump motor controller can be called an oil pump motor MCU.

[0044] Furthermore, the electric air compressor 32 is controlled by the air pump MCU, the BDU performs high-voltage power distribution through the PDU, the drive motor 5 is controlled by the drive motor controller, and the low-voltage electrical system is controlled by the DC-DC converter. The above four modules are integrated to form a four-in-one controller.

[0045] Furthermore, the power battery 1 distributes and manages the vehicle's power supply through the PDU. The PDU lays the foundation for controlling the vehicle's charging and discharging, powering on and off high-voltage components, and providing overload protection. The BDU is primarily responsible for battery disconnection and protection, ensuring vehicle safety in emergency situations; while the PDU is responsible for power distribution and protection, ensuring the reliable operation of various devices and subsystems. Through the coordinated work of these two units, the vehicle's electrical system can better adapt to various operating conditions, providing superior performance and safety.

[0046] It should be noted that the motor controller is the core component of the motor control system. It is responsible for managing and controlling the operation of the motor. By receiving instructions, it precisely controls the operating parameters of the motor to ensure that the motor works in a predetermined manner.

[0047] It is understood that, in another embodiment, the all-in-one controller 3 is a five-in-one controller that integrates a high-voltage junction box, an air pump controller, a drive motor controller, an oil pump motor controller, and a DC-DC converter.

[0048] In one embodiment, the hydraulic pumps include a piston pump 11 and a gear pump 12. The upper working mechanism includes a luffing mechanism, a hoisting mechanism, a telescopic mechanism, and a slewing mechanism. The piston pump 11 is connected to the luffing mechanism, the hoisting mechanism, and the telescopic mechanism via hydraulic lines, and the gear pump 12 is connected to the slewing mechanism via hydraulic lines. By providing power to several actuators through two pumps, the two pumps are integrated into one unit, resulting in a high degree of integration, which improves the reliability of the hydraulic system and reduces maintenance costs.

[0049] Furthermore, the luffing mechanism includes a luffing cylinder, a connecting rod mechanism, etc.; the telescopic mechanism includes a telescopic cylinder, etc.; the winch mechanism includes a winch motor, etc.; and the slewing mechanism includes a slewing motor, etc. The plunger pump 11 is connected to the winch motor, the telescopic cylinder, and the luffing cylinder through a main valve, and the gear pump 12 is connected to the slewing motor through a slewing control valve.

[0050] Specifically, the power battery 1, BDU, four-in-one controller, oil pump motor MCU, and oil pump motor 4 are connected in sequence. The power battery 1 provides power for the operation of the whole vehicle. The oil pump motor 4 provides power for the plunger pump 11 and gear pump 12. The plunger pump 11 provides hydraulic power for the winch, telescopic and luffing actions. The plunger pump 11 has a remote control function, which can realize the operation function of the vehicle through remote control.

[0051] It should be noted that the luffing mechanism, hoisting mechanism, telescopic mechanism, and slewing mechanism are all conventional structures, and will not be described in detail here.

[0052] In one embodiment, the vehicle also includes a brake, a filling valve, an accumulator, and a brake valve, with the plunger pump 11, filling valve, accumulator, brake valve, and brake cylinder connected in sequence. The plunger pump 11, filling valve, accumulator, brake valve, and brake cylinder form a hydraulic braking system. This system provides strong braking force, ensuring the vehicle can quickly decelerate or stop under high-speed or heavy-load conditions. The hydraulic braking system can evenly distribute brake fluid to the brakes of each wheel through pipes, ensuring that the braking force on each wheel is the same.

[0053] Specifically, the plunger pump 11, filling valve, accumulator, brake valve, and brake cylinder are sequentially connected via hydraulic lines. During vehicle operation, the accumulator automatically detects pressure and fills the hydraulic system for braking. The filling valve controls the flow of hydraulic fluid in the system, ensuring that the system can replenish fluid when needed. The accumulator stores and releases hydraulic energy, maintaining stable system pressure and reducing pressure fluctuations. The brake valve controls the flow of hydraulic fluid in the hydraulic braking system to achieve the braking function. When braking is required, the brake valve opens, sending high-pressure hydraulic fluid into the brake cylinder to actuate it; when braking is not required, the brake valve closes, cutting off the flow of hydraulic fluid.

[0054] In one embodiment, the vehicle also includes outrigger cylinders, outrigger control valves, suspension cylinders, and suspension valves. Gear pump 12 is connected to the outrigger cylinders via the outrigger control valves and to the suspension cylinders via the suspension valves. Gear pump 12 provides hydraulic power to the outrigger cylinders and suspension cylinders. Gear pump 12 has a relatively simple structure, low manufacturing cost, and is easier to maintain and repair.

[0055] It should be noted that the suspension cylinder is used to connect the frame and the axle. By controlling the extension or retraction of the suspension cylinder, the lifting and lowering of the frame can be controlled, thereby achieving the leveling of the entire vehicle.

[0056] Furthermore, the gear pump 12 is connected to the pin cylinder via an auxiliary control valve. The pin cylinder is used to lock the slewing platform to prevent the slewing platform from rotating relative to the undercarriage during operation, thereby improving the reliability of operation on the upper vehicle.

[0057] In one embodiment, the vehicle also includes a battery 6, and a multi-function controller 3 is electrically connected to the battery 6. The DC-DC converter in the multi-function controller converts the high voltage to low voltage to charge the 24V battery 6, thereby enabling the 24V battery 6 to provide power to the vehicle's low-voltage electrical system and ensure the normal operation of the low-voltage electrical system.

[0058] In one embodiment, the vehicle also includes a transmission, a transmission controller 8, and a vehicle controller 9. The drive motor 5 is connected to the walking mechanism via the transmission. The transmission controller 8 is electrically connected to the transmission and the vehicle controller 9. The vehicle controller 9 and the transmission controller 8 are electrically connected to the battery 6. The transmission controller 8 can also be referred to as the TCU.

[0059] The TCU controls the transmission 7, managing and controlling all operations of the transmission 7 to ensure optimal vehicle performance under various driving conditions. The TCU receives signals from various sensors, calculates, and sends commands to the actuators to achieve precise control of the transmission 7. Meanwhile, the VCU manages and controls the entire vehicle, optimizing power output and driving experience to improve overall vehicle performance and reliability.

[0060] It should be noted that the vehicle controller 9 receives electrical signals from the entire vehicle and sends signals to various component systems / mechanisms through the CAN system, ensuring that it can be implemented under various working conditions, thus achieving safe and efficient operation of the crane.

[0061] In one embodiment, the vehicle also includes a vehicle controller 10, which is electrically connected to the vehicle controller 9 (VCU) and the battery 6. The vehicle controller 10 and the VCU integrate the control of the entire vehicle. The vehicle controller 10 is mainly responsible for the control and safety protection of the working mechanism, ensuring efficient and safe operation. Through the collaborative work of the vehicle controller 10 and the vehicle controller 9, the vehicle and construction machinery can better adapt to various working environments and driving conditions, providing superior performance and safety.

[0062] Furthermore, the onboard controller 10 is connected to the display screen, button panel, rotary encoder, air conditioning controller, and conductive ring via a CAN bus. The rotary encoder is connected to the rotary motor, and the conductive ring is connected to the long angle sensor. The vehicle controller 9 is also connected to the onboard controller 10, TCU, oil pump motor MCU, four-in-one controller, thermal management controller, and BMS via a CAN bus. When the energy storage device is charging, the BMS is electrically connected to the fast charging gun. The thermal management controller is electrically connected to the electric compressor and PTC heater. The thermal management controller controls the air conditioning compressor 31 and the PTC heater, which is used for heating the cab and battery thermal management. By precisely controlling the compressor and PTC heater, the thermal management controller ensures that the electric vehicle maintains optimal temperature conditions under various operating conditions. This comprehensive management not only improves vehicle comfort and performance but also extends the lifespan of the battery and other key components, enhancing overall energy efficiency and safety.

[0063] It should be noted that conductive rings are used to transmit power and signals between rotating and stationary components. Long-angle sensors are used to measure and monitor angular changes in the crane boom or other rotating components. These sensors provide high-precision angle measurements, helping the control system to adjust and optimize crane operation in real time.

[0064] In one embodiment, the vehicle also includes an air conditioning compressor 31, which is electrically connected to the multi-function controller 3. The air conditioning compressor 31 is responsible for compressing the refrigerant gas, increasing its pressure and temperature, and then sending it to the condenser. After the air conditioning compressor 31 is electrically connected to the VCU, precise control of the compressor's operating status can be achieved, enhancing the comfort experience for passengers.

[0065] Furthermore, the operating machinery also includes an air conditioner, which includes an air conditioning compressor 31, an evaporator, a condenser, an expansion valve, etc. The air conditioner cools or heats the cab, thereby achieving temperature regulation and air quality management in the cab and improving the operator's comfort and work efficiency.

[0066] In one embodiment, the substation also includes an air filter, an electric air compressor 32, a dryer, an air tank, and a shift actuator connected in sequence. The shift actuator is connected to the transmission, and the electric air compressor 32 is electrically connected to the multi-function controller 3. The air pump MCU is controlled by the multi-function controller, and sensors mounted on the air tank and dryer detect pressure. When the sensor at the air tank valve outlet detects that the air pressure is lower than the minimum pressure of the transmission valve 7, the electric air compressor 32 starts; when the sensor on the dryer detects that the air pressure is higher than the cut-off pressure, the electric air compressor 32 stops. The air filter, electric air compressor 32, dryer, air tank, and shift actuator form a pneumatic shift mechanism, enabling fast and reliable shifting.

[0067] Furthermore, an air filter is used to filter the air entering the pneumatic system, removing dust, impurities, and moisture to ensure clean air entering the system. An electric air compressor 32 generates compressed air, providing a power source for the pneumatic system. A dryer further removes moisture from the compressed air, preventing moisture from entering the pneumatic system and avoiding problems such as rust and freezing. An air reservoir stores compressed air, ensuring sufficient pressure for the pneumatic system when needed. The shift actuator, such as a cylinder, pushes the shift lever or shift fork of the transmission to achieve gear switching.

[0068] In one embodiment, the operating machinery also includes a DC charging interface. The vehicle charges from a charging station through the DC charging interface. Depending on the selected charging station with different power outputs and the vehicle's onboard charger, the power battery 1 can be charged, thus achieving energy input. An external power supply device's charging gun can be inserted into the DC charging interface to charge the power battery 1. Compared to AC charging, DC charging can directly provide DC power to the power battery 1, resulting in faster charging speeds and improved charging efficiency.

[0069] The energy storage device is power battery 1, which has advantages such as long cycle life and environmental sustainability.

[0070] The power battery 1 is connected to the BDU, the four-in-one controller, the drive motor 5, and the gearbox 7 to provide power to the front axle of the vehicle. During the vehicle's operation, the drive motor 5 drives the vehicle, while the oil pump motor 4 is idling to provide power for the vehicle's steering and braking. The oil pump motor 4 is connected to the plunger pump 11 and the gear pump 12. During the vehicle's operation, the accumulator will automatically detect the pressure and charge the fluid for braking. The gear pump 12 provides hydraulic power for steering during the vehicle's operation.

[0071] Understandably, the power battery 1 can also be replaced with other energy storage devices to convert other forms of energy into electrical energy and store it in the energy storage device.

[0072] It is understood that, in another embodiment, an AC charging interface may be used instead of a DC charging interface.

[0073] In one embodiment, when the vehicle speed exceeds a set speed during driving and the brakes are suddenly applied, or when the vehicle is in a coasting state, energy is fed back to the power battery 1, thereby achieving an energy recovery mode. For example, the set speed is 20 km / h.

[0074] Specifically, the operating machinery includes, but is not limited to, cranes, excavators, pile drivers, and mixers.

[0075] 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 purely electric work machine, characterized in that, include: The vehicle includes an energy storage device, a battery distribution unit (2), an all-in-one controller (3), an oil pump motor (4), a drive motor (5), a hydraulic oil pump, and a walking mechanism. The energy storage device, the battery distribution unit (2), and the all-in-one controller (3) are electrically connected in sequence. The all-in-one controller (3) is electrically connected to the drive motor (5) and the oil pump motor (4). The drive motor (5) is connected to the walking mechanism, and the oil pump motor (4) is connected to the hydraulic oil pump. The loading mechanism includes a loading operation mechanism connected to the hydraulic oil pump.

2. The pure electric work machinery according to claim 1, characterized in that, The multi-in-one controller (3) is a four-in-one controller that integrates a high-voltage junction box, an air pump controller, a drive motor controller and a DC-DC converter. The vehicle also includes an oil pump motor controller. The four-in-one controller is electrically connected to the oil pump motor (4) through the oil pump motor controller. Alternatively, the all-in-one controller (3) is a five-in-one controller that integrates a high-voltage junction box, an air pump controller, a drive motor controller, an oil pump motor controller, and a DC-DC converter.

3. The pure electric work machinery according to claim 1 or 2, characterized in that, The hydraulic oil pump includes a plunger pump (11) and a gear pump (12). The upper working mechanism includes a luffing mechanism, a winch mechanism, a telescopic mechanism and a slewing mechanism. The plunger pump (11) is connected to the luffing mechanism, the winch mechanism and the telescopic mechanism through hydraulic lines. The gear pump (12) is connected to the slewing mechanism through hydraulic lines.

4. The pure electric work machinery according to claim 3, characterized in that, The vehicle also includes a brake cylinder, a filling valve, an accumulator, and a brake valve, with the plunger pump (11), the filling valve, the accumulator, the brake valve, and the brake cylinder connected in sequence.

5. The pure electric work machinery according to claim 3, characterized in that, The vehicle also includes outrigger cylinders, outrigger control valves, suspension cylinders and suspension valves. The gear pump (12) is connected to the outrigger cylinders through the outrigger control valves and to the suspension cylinders through the suspension valves.

6. The pure electric work machinery according to claim 2, characterized in that, The vehicle also includes a battery (6), and the all-in-one controller (3) is electrically connected to the battery (6).

7. The pure electric work machinery according to claim 6, characterized in that, The vehicle also includes a transmission, a transmission controller (8), and a vehicle controller (9). The drive motor (5) is connected to the walking mechanism through the transmission. The transmission controller (8) is electrically connected to the transmission and the vehicle controller (9). The vehicle controller (9) and the transmission controller (8) are electrically connected to the battery (6).

8. The pure electric work machinery according to claim 7, characterized in that, The vehicle also includes a vehicle controller (10), which is electrically connected to the vehicle controller (9) and the battery (6).

9. The pure electric work machinery according to claim 1 or 2, characterized in that, The vehicle also includes an air conditioning compressor (31), which is electrically connected to the all-in-one controller (3).

10. The pure electric work machinery according to claim 7, characterized in that, The vehicle also includes an air filter, an electric air compressor (32), a dryer, an air tank, and a gear shifting mechanism connected in sequence. The gear shifting mechanism is connected to the transmission, and the electric air compressor (32) is electrically connected to the all-in-one controller (3).

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