Hybrid control device for a telescopic boom crawler crane

Abstract

The utility model discloses a mixed power control device of telescopic boom crawler crane, include: engine, clutch, motor, integration unit, control unit, battery system, direct current charging mouth and mains interface, hydraulic pump, integration unit includes OBC, PDU, AC DC rectifier module and DC DC conversion module, and battery system is integratively equipped with BMS module, TMS module, and direct current charging mouth and mains interface are electrically connected with battery system and integration unit respectively through central swivel joint, and control unit can acquire charging interface state, battery capacity, clutch pressure and load power in real time, and according to the automatic switching engine mode and motor mode of working condition, through the pressure value of closed loop control hydraulic clutch dynamic adjustment between setting connection point and disconnection point, be applicable to various complex working conditions, through control unit real -time detection and transmission signal control, guarantee that vehicle has sufficient power performance. The utility model is simple to operate, and quick and stable, and the energy utilization rate is high, safe, environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of power control technology for mechanical equipment, and in particular to a hybrid power control device for a telescopic boom crawler crane. Background Technology

[0002] A hybrid power system is a controllable power system that incorporates three power sources: an engine, a battery system, and mains power. In the current context of rising fuel costs and stringent environmental protection laws, hybrid power systems can reduce fuel consumption and emissions, protecting the environment. When powered by either the battery system or mains power, they can also significantly reduce noise pollution, aligning with the upcoming trend towards new energy sources.

[0003] Current hybrid power systems suffer from problems such as unstable batteries, cumbersome control, unstable connections, low energy utilization, and energy waste due to mismatch between the selected power source and the output caused by various reasons.

[0004] The hybrid power control device of this telescopic boom crawler crane solves the above-mentioned defects by using intelligent pressure closed-loop control of the hydraulic clutch and dynamic scheduling of three energy sources (diesel / battery / mains power).

[0005] The control unit and hydraulic clutch in this invention can automatically select the motor drive mode based on pressure judgment, and make adjustments based on information such as the current vehicle task and requested power, so that the engine works in the optimal state, the motor uses clean energy to the maximum extent while ensuring efficiency, reduces fuel emissions and improves economy, and connects the control unit and the control screen through the CAN bus, which is fast and stable, and displays the current status of each part in real time, so that the driver can better grasp the vehicle information.

[0006] During use, when the telescopic boom crawler crane is powered on before starting, the control unit obtains the current charging port and mains power connection status and battery system power information, and transmits it to the control panel, so that the driver can fully understand the current vehicle status before starting work. At the same time, the hydraulic clutch pressure detection switch is opened to receive, analyze and process the current hydraulic oil pressure information, prepare for entering the working state, and flexibly control the vehicle to enter different modes. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide a hybrid power control device for telescopic boom crawler cranes that is simple to operate, easy to switch, fast and stable, has high energy utilization, is safe and environmentally friendly.

[0008] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0009] A hybrid power control device for a telescopic boom crawler crane, the hybrid power control device being installed inside the vehicle body, includes: an engine, a clutch, a motor, an integrated unit, a control unit, a battery system, a DC charging port and a mains power interface, and a hydraulic pump. The clutch is a radially inlet hydraulic clutch with an internal pressure detection device, a hydraulic pump, a pressure relief valve, and electronically controlled operation. The motor is electrically connected to the clutch. The integrated unit includes an OBC module, a PDU module, an AC-DC rectifier module, and a DC-DC converter module. The battery system includes a battery module and an integrated BMS module and TMS module. The DC charging port and AC power interface are electrically connected to the battery system and the integrated unit respectively via a central rotary connector. The control unit is electrically connected to the integrated unit, battery system, motor, and clutch. The control unit can acquire the charging interface status, battery power, clutch pressure, and load power in real time and output control signals. The control unit can switch between engine mode, motor mode, or intelligent hybrid mode. The control unit automatically switches between engine mode and motor mode according to the operating conditions and dynamically adjusts the pressure value of the hydraulic clutch between the set connection point and disconnection point through closed-loop control.

[0010] In the above technical solution, the control logic of the hydraulic clutch includes: when the pressure is lower than the set minimum connection point, the hydraulic pump is started to pressurize; when the pressure is higher than the set maximum connection point, the pressure relief valve is opened to reduce the pressure; when the clutch disengages, if the pressure does not drop to the disconnection value, the pressure relief valve can be opened again to release pressure; if a pressure fault is detected, the pressure can be forcibly released and the engine cannot be started.

[0011] In the above technical solution, the working logic of the engine mode is as follows: the hydraulic clutch engages, the engine drives the motor to drive the hydraulic pump, the excess power of the motor charges the battery system through the integration unit, and charging is automatically terminated when the battery charge is ≥90%.

[0012] In the above technical solution, the motor mode includes pure electric mode and electric charging mode. In pure electric mode, the motor is driven by the battery system independently. In electric charging mode, the motor is driven by the mains power through the integration unit and can optionally charge the battery system. When the electric charging operation ends, if the battery module has insufficient power, it can automatically switch to mains charging mode.

[0013] In the above technical solution, the control unit is also equipped with an intelligent hybrid function. The working logic of the intelligent hybrid mode is as follows: when there is a high power demand during luffing / slewing / lifting, it automatically switches to the motor mode; when the engine is idling, it automatically switches to the pure electric mode. The intelligent hybrid mode supports manually turning off this function.

[0014] In the above technical solution, the control unit is connected to the control screen set on the upper part of the vehicle body via a CAN bus to display the system status and fault information in real time. The startup logic of the control unit is as follows: detect the connection status of the charging interface and the power of the battery module. When the mains power connection is stable, force the vehicle to enter the power-driving state. When there is no mains power connection, select the pure electric mode or the engine mode according to the power threshold of the battery module.

[0015] In the above technical solution, the capacity of the battery system is 200 kWh, and the charge / discharge rate of the battery system is 0.6c.

[0016] In the above technical solution, the OBC module supports automatic master-slave allocation via the CAN bus when multiple units are connected in parallel, and dynamically allocates charging power according to the battery module's power and load requirements. In the above technical solution, the DC charging port and AC power interface are located on the side of the lower part of the vehicle body near the tracks, and are electrically connected to the electrical system located on the upper part of the vehicle body via the central rotary joint.

[0017] The beneficial effects of this utility model are as follows:

[0018] This utility model's hybrid power control device features two modes and multiple operating states. These modes are controlled by the control unit through real-time detection and signal transmission, making it suitable for various complex working conditions. The two modes, controlled by the control unit, offer advantages such as accurate judgment, flexible switching, and timely and stable display, ensuring the vehicle has sufficient power performance and smoothly enters the corresponding operation. The hydraulic clutch features intelligent pressure stabilization, adjusting through real-time pressure feedback to ensure reliable engagement / disengagement. In engine mode, it provides surplus power charging; in off-line charging mode, it offers intelligent charging management; and in operating condition adaptive mode, it features intelligent hybrid logic for switching to pure electric mode during high-power surges and idling. This utility model is simple, fast, stable, has high energy utilization, and is safe and environmentally friendly. Attached Figure Description

[0019] Figure 1 This is a structural block diagram of the hybrid power control device for the telescopic boom crawler crane of this utility model;

[0020] Figure 2 This is one of the structural schematic diagrams of the hybrid power control device for the telescopic boom crawler crane of this utility model;

[0021] Figure 3 This is the second schematic diagram of the hybrid power control device for the telescopic boom crawler crane of this utility model.

[0022] In the diagram, 1-engine, 2-clutch, 3-motor, 4-integrated unit, 5-control unit, 6-battery system, 7-DC charging port and AC power interface, 8-hydraulic pump, 9-vehicle body. Detailed Implementation

[0023] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] like Figure 1-3 As shown, a hybrid power control device for a telescopic boom crawler crane is installed inside the vehicle body 9. The device includes: an engine 1, a clutch 2, a motor 3, an integrated unit 4, a control unit 5, a battery system 6, a DC charging port and a mains power interface 7, and a hydraulic pump 8. The clutch 2 is a radially inlet hydraulic clutch with an internal pressure detection device, a hydraulic pump, a pressure relief valve, and electronic control. The motor 3 is electrically connected to the clutch 2. The integrated unit 4 includes an OBC module, a PDU module, an AC-DC rectifier module, and a DC-DC converter module. The battery system includes a battery module and an integrated BMS module and TMS module. The DC charging port and the mains power interface are electrically connected to the battery system and the integrated unit respectively via a central rotary joint. The control unit is electrically connected to the integrated unit, the battery system, the motor 3, and the clutch 2. The control unit 5 can acquire the charging interface status, battery charge, clutch 2 pressure, and load power in real time and output control signals. The control unit 5 automatically switches between engine mode and motor mode according to the working conditions and dynamically adjusts the hydraulic clutch pressure between a set connection point and a disconnection point through closed-loop control.

[0025] Specifically, in this embodiment, the hydraulic clutch has a built-in pressure detection device that can detect the pressure of the hydraulic oil in the hydraulic clutch in real time and send the detection result to the control unit 5. After receiving the signal returned by the control unit 5, the hydraulic pump 8 and the pressure relief valve are flexibly changed under the control of this signal, so as to control the connection or disconnection of the engine 1 and the motor 3 through the hydraulic clutch.

[0026] Specifically, in this embodiment, the control unit 5 can switch between engine mode, motor mode, and intelligent hybrid mode. In engine mode, the hydraulic clutch is engaged, and the engine 1 acts as the power source, driving the motor 3 to rotate. The motor 3 then drives the hydraulic pump 8. In this mode, the motor 3 only acts as an energy transfer mechanism and charges the battery system 6. In motor mode, the hydraulic clutch is disengaged, and the motor 3 acts as the power source, driving the hydraulic pump 8. In motor mode, there are two operating states: pure electric operation and electric-assisted operation. In pure electric operation, the battery module provides energy to the motor 3. In electric-assisted operation, the charging port is connected to the mains power, and the mains power and the integrated unit 4 connect the motor 3 to drive the hydraulic pump 8. In electric-assisted operation, the battery system 6 can be charged while the crane is operating. Alternatively, the battery system 6 can be charged separately using the mains charging port when not in operation, with charging protection set so that the battery system 6 automatically disconnects from the mains power after being fully charged, preventing overcharging damage and energy waste.

[0027] Specifically, in this embodiment, motor 3 is a permanent magnet synchronous motor. When the hydraulic clutch is engaged, motor 3 acts as a coupling to enable engine 1 to output power to hydraulic pump 8 or simultaneously charge battery system 6 through integrated unit 4. When the hydraulic clutch is disengaged, motor 3 will be fully driven by integrated unit 4 to output power to hydraulic pump 8 or charge battery system 6. Engine 1 is an internal combustion engine that uses diesel fuel and outputs torque to perform work. It is controlled by control unit 5 and can automatically start or shut down.

[0028] Specifically, in this embodiment, the integrated unit comprises an OBC module (on-board charging system), a PDU module (power distribution unit), an AC-DC rectifier module (uncontrolled rectification), a DC-DC power supply, and other integrated units.

[0029] In a preferred embodiment of this utility model, the control logic of the hydraulic clutch includes: when the pressure is lower than the set minimum connection point, the hydraulic pump 8 is started to pressurize; when the pressure is higher than the set maximum connection point, the pressure relief valve is opened to reduce the pressure; when the clutch 2 is disengaged, if the pressure has not dropped to the disconnection value, the pressure relief valve can be opened again to release pressure; if a pressure fault is detected, the pressure can be forcibly released and the engine 1 can be prohibited from starting.

[0030] Specifically, in this embodiment, the hydraulic clutch is driven by a small DC motor to pressurize the hydraulic pump 8 (hereinafter referred to as the hydraulic pump) with hydraulic oil, so that the engine 1 is connected to the motor 3 through the hydraulic clutch; the hydraulic oil is depressurized by the pressure relief valve so that the engine 1 is disconnected from the motor 3 through the hydraulic clutch, and the device is automatically and intelligently controlled by the control unit 5.

[0031] Under normal circumstances, when the hydraulic clutch is disengaged, the hydraulic oil pressure detection result reaches the disengagement point; when it is engaged, the detection result reaches the engagement point. After entering the working state, the control unit 5 monitors the hydraulic clutch pressure in real time. When the hydraulic clutch is engaged, the hydraulic oil pressure may fluctuate. If the pressure is higher than the set maximum engagement point, the hydraulic clutch pressure is too high, and the control unit 5 automatically controls the hydraulic clutch pressure relief valve to open, reducing the pressure to the normal operating range. If the pressure is lower than the set minimum engagement point, the hydraulic oil pressure is too low, and the control unit 5 automatically controls the hydraulic pump 8 of the hydraulic clutch to pressurize, increasing the pressure until it reaches the normal operating range.

[0032] When the hydraulic clutch disengages from the engaged state, the hydraulic oil may not be fully depressurized. If the detected pressure is higher than the set disconnect value, the hydraulic clutch is not fully depressurized. Control unit 5 then controls the pressure relief valve of the hydraulic clutch to reopen and release pressure until the pressure of the hydraulic clutch returns to the disconnect value at the disengaged state. The above process is fully automatic and intelligently controlled. Control unit 5 receives and processes the information sent by the pressure detection device and returns a control signal, ensuring safety, stability, flexibility, and speed. When the pressure detection device malfunctions, control unit 5 immediately controls the pressure relief valve to open to prevent accidents; simultaneously, it sends a control signal to engine 1 to prevent engine 1 from starting as a protection measure.

[0033] In a preferred embodiment of this utility model, the working logic of the engine mode is as follows: the hydraulic clutch engages, the engine 1 drives the motor 3 to drive the hydraulic pump 8, and the excess power of the motor 3 charges the battery system 6 through the integration unit. When the battery module's charge is ≥90%, charging is automatically terminated.

[0034] Specifically, in this embodiment, the hydraulic pump is used for various actions of the equipment operation.

[0035] In a preferred embodiment of this utility model, the motor mode includes a pure electric state and a power-driving state. In the pure electric state, the motor 3 is driven by the battery system 6 independently powered by the battery system 6. In the power-driving state, the motor 3 is driven by the mains power through the integration unit 4, and can optionally charge the battery system 6. When the power-driving state ends, if the battery module has insufficient power, it can automatically switch to the mains power charging mode.

[0036] Specifically, in this embodiment, when the telescopic boom crawler crane vehicle is about to enter the working state, the control unit controls the vehicle according to information such as the charging port and mains power connection status, battery system power, etc. When the charging port is connected to the mains power stably and meets the standard, the control unit 5 controls the hydraulic clutch pressure relief valve to open until the detected pressure result is lower than the set minimum disconnection value, the engine 1 and the hydraulic clutch are disengaged from the motor 3, the engine 1 does not start, and the vehicle enters the electric drag state.

[0037] In tethered mode, all vehicle power is supplied by the mains power and the integrated unit connected to the charging port. Drive motor 3 drives hydraulic pump 8, while engine 1 and battery system 6 do not participate in the operation of motor 3. In this mode, control unit 5 automatically monitors battery system charge and motor 3 output power. If battery system 6's charge is insufficient for operation, and motor 3's output power is still sufficient for tethered operation, the integrated unit 4 can charge the battery system. When the battery system is fully charged, control unit 5 receives battery system 6 charge information and immediately disconnects battery system 6 and integrated unit 4 from the mains power to protect battery system 6 from overcharging.

[0038] When the electric tripping operation is completed and the vehicle is turned off, if the mains power connection is still connected, the control unit 5 will again determine the battery system 6 based on the collected information: if the battery system 6 has a low charge, the mains power connection integration unit 4 will be used to charge the battery system 6 independently. At this time, there is no need to manually wait to disconnect the mains power connection; the control unit 5 will automatically disconnect the mains power connection when the battery system 6 is fully charged, protecting the battery system 6 and avoiding continuous waste of electrical energy.

[0039] In a preferred embodiment of this utility model, the control unit is further provided with an intelligent hybrid function. The working logic of the intelligent hybrid mode is as follows: when there is a high power demand during luffing / slewing / lifting, it automatically switches to motor mode; when the engine is idling, it automatically switches to pure electric mode. The intelligent hybrid mode supports manually turning off this function.

[0040] Specifically, in this embodiment, the intelligent hybrid mode supports manually turning off the automatic switching function.

[0041] Specifically, in this embodiment, when the intelligent hybrid function is activated, the required power instantly reaches its maximum when the vehicle first begins to perform actions such as luffing, turning, lifting, and driving. Using engine mode at this time would lead to a sudden increase in fuel demand, resulting in incomplete combustion and low energy conversion efficiency. At this point, the control unit 5 intelligently controls the vehicle to enter the higher energy conversion rate motor mode. The control unit 5 controls the pressure relief valve to disengage the hydraulic clutch from the motor, shutting off the engine. The battery system 6 and the integrated unit 4 then power the motor 3 to drive the hydraulic pump 8 for high-power operation. When the vehicle operates at a constant speed, the control unit 5 can control the hydraulic pump 8 to pressurize, connecting the engine 1 and the hydraulic clutch to the motor 3, starting the engine 1, and the vehicle returns to engine mode. When the vehicle is in engine mode but not operating, idling, the engine 1 constantly burns fuel, consuming energy and generating environmental and noise pollution. In this case, the control unit 5 should intelligently control the vehicle to enter the lower-consumption, quieter, and more environmentally friendly motor mode. The control unit 5 controls the pressure relief valve to disengage the hydraulic clutch from the motor, shutting off the engine, and the vehicle enters battery mode for idling. When the control system detects that the battery system's charging status has reached 90% or higher, the control unit 5 automatically disconnects the charging and notifies the driver via the control screen that charging is complete and the vehicle can re-enter electric motor mode. When the vehicle switches from engine mode to electric motor mode, the control unit 5 controls the hydraulic clutch's pressure relief valve to open until the detected pressure is below the minimum disconnection value, causing engine 1 and the hydraulic clutch to disengage from electric motor 3, and engine 1 shuts off. Electric motor 3, powered by battery system 6 and integrated unit 4, drives hydraulic pump 8 to operate, entering electric motor mode to conserve energy.

[0042] In a preferred embodiment of this utility model, the control unit 5 is connected to the control screen located on the upper part of the vehicle body via a CAN bus to display the system status and fault information in real time. The startup logic of the control unit 5 is to detect the connection status of the charging interface and the power of the battery module. When the mains power connection is stable, it is forced to enter the power-off state. When there is no mains power connection, it selects the pure electric mode or the engine mode according to the power threshold of the battery module.

[0043] Specifically, in this embodiment, the control unit 5 can automatically switch between engine mode and electric motor mode according to the current operating conditions to achieve the effects of matching power and saving energy.

[0044] Specifically, in this embodiment, the control unit 5 acquires all information, including the charging port and mains connection status, battery system 6 power information, engine output power, hydraulic clutch pressure, integration unit 4 working status, motor 3 current required power and actual power, etc. After acquiring the information, it performs intelligent judgment processing, calculates data considering all situations and selects the optimal solution, and returns the result to each part in the form of control signals to control the vehicle to make adjustments so as to automatically and flexibly select and switch working states. The control unit 5 is the core part of the hybrid power control device of the telescopic boom crawler crane.

[0045] Specifically, in this embodiment, if the charging port is not connected to the mains power, the control unit 5 detects the battery system 6 power information, compares the obtained result with the vehicle working status information, and determines the vehicle's working mode. When it is detected that the current battery system 6 power meets the working requirements, it enters the pure electric mode; when it is detected that the battery system 6 power does not meet the working requirements, it enters the engine mode.

[0046] Specifically, in this embodiment, in motor mode, the control unit 5 controls the pressure relief valve of the hydraulic clutch to open until the detected pressure is lower than the set minimum disconnection value. The engine 1 and the hydraulic clutch are disengaged from the motor 3, the engine 1 does not start, and the motor 3 is powered only by the integrated unit and the battery system 6. The vehicle enters motor mode, in which the battery system 6 and the integrated unit 4 connect the motor 3 to drive the hydraulic pump 8 to perform operations.

[0047] Meanwhile, during the operation, the control unit 5 continues to process the battery system 6 power information and compares it with the vehicle's operating status information in real time. Once the battery system 6 power is insufficient to meet the battery mode operating requirements, the control unit 5 will immediately notify the driver through the control screen to connect the charging port to the mains power and enter the drag charging state.

[0048] Specifically, in this embodiment, if the charging port is not connected to the mains power and the control unit 5 detects that the battery system 6 power information cannot meet the requirements of the battery mode operation, the control unit 5 controls the hydraulic pump 8 (motor pump) of the hydraulic clutch to open, raising the pressure to the normal operating range, and the engine 1 is connected to the hydraulic clutch and the motor 3, and the engine 1 is started at the same time, so that the vehicle enters the engine mode.

[0049] In engine mode, the vehicle's power is provided by engine 1 and hydraulic clutch. Drive motor 3 drives hydraulic pump 8 to operate. Battery system 6 and integration unit 4 do not participate in the operation of motor 3. At the same time, control unit 5 detects the output power of motor 3. If the output power of motor 3 meets the current working requirements and has surplus, the surplus power is used to charge battery system 6 through integration unit 4 to ensure maximum energy utilization. At this time, the vehicle enters engine charging mode.

[0050] In a preferred embodiment of this utility model, the capacity of the battery system 6 is 200 kWh, and the charge / discharge rate of the battery system 6 is 0.6c.

[0051] Specifically, in this embodiment, the battery system 6 fully meets the vehicle's operating requirements for 4-8 hours in battery mode. The battery system 6 is an independent module connected via CANBUS bus, equipped with BMS (Battery Management System) and TMS (Thermal Management System), facilitating system management, self-diagnosis, and fault feedback. It is also compatible with various voltage platforms, making it easy to work with the integration unit 4 and other components such as the motor 3.

[0052] In a preferred embodiment of this invention, the OBC module supports automatic master-slave allocation via CAN bus when multiple units are connected in parallel, and dynamically allocates charging power according to the battery module's power and load requirements.

[0053] In a preferred embodiment of this utility model, the DC charging port and the mains power interface 7 are located on the side of the lower part of the vehicle body 9 near the track, and are electrically connected to the electrical system located on the upper part of the vehicle body 9 through a central rotary joint.

[0054] Specifically, in this embodiment, the other end of both the DC charging port and the mains connection interface 7 is located on the tracks at the bottom of the vehicle body 9, which makes it easier to adapt to smaller terrains or complex operations.

[0055] Specifically, in this embodiment, during use, when the telescopic boom crawler crane is powered on before starting, the control unit 5 obtains the current charging port and mains power connection status and battery system 6 power information, and transmits it to the control screen, so that the driver can fully understand the current vehicle status before starting work; at the same time, the hydraulic clutch pressure detection switch is turned on, and the current hydraulic oil pressure information is received, analyzed and processed to prepare for entering the working state and flexibly control the vehicle to enter different modes.

[0056] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0058] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A hybrid power control device for a telescopic boom crawler crane, wherein the hybrid power control device is disposed inside the vehicle body, characterized in that, include: The system comprises an engine, clutch, motor, integrated unit, control unit, battery system, DC charging port and AC power interface, and hydraulic pump. The clutch is a radially inlet hydraulic clutch with an internal pressure detection device, hydraulic pump, pressure relief valve, and electronic control. The motor is electrically connected to the clutch. The integrated unit includes an OBC module, PDU module, AC-DC rectifier module, and DC-DC converter module. The battery system includes a battery module and integrated BMS and TMS modules. The DC charging port and AC power interface are electrically connected to the battery system and the integrated unit respectively via a central rotary joint. The control unit is electrically connected to the integrated unit, battery system, motor, and clutch. The control unit can acquire the charging interface status, battery charge, clutch pressure, and load power in real time and output control signals. The control unit can implement engine mode, motor mode, or intelligent hybrid mode. The control unit automatically switches between engine mode and motor mode according to the operating conditions and dynamically adjusts the pressure value of the hydraulic clutch between a set connection point and a disconnection point through closed-loop control.

2. The hybrid power control device for the telescopic boom crawler crane according to claim 1, characterized in that, The control logic of the hydraulic clutch includes: when the pressure is lower than the set minimum connection point, the hydraulic pump is started to pressurize; when the pressure is higher than the set maximum connection point, the pressure relief valve is opened to reduce the pressure; when the clutch disengages, if the pressure does not drop to the disconnection value, the pressure relief valve can be opened again to release pressure; if a pressure fault is detected, the pressure can be forcibly released and the engine cannot be started.

3. The hybrid power control device for the telescopic boom crawler crane according to claim 2, characterized in that, The working logic of the engine mode is as follows: the hydraulic clutch engages, the engine drives the motor to drive the hydraulic pump, and the excess power of the motor charges the battery system through the integration unit. When the battery charge is ≥90%, charging is automatically terminated.

4. The hybrid power control device for the telescopic boom crawler crane according to claim 3, characterized in that, The motor modes include pure electric mode and charged mode. In pure electric mode, the motor is driven by the battery system independently. In charged mode, the motor is driven by AC power through the integration unit and can optionally charge the battery system. When the charged mode ends, if the battery module has insufficient power, it can automatically switch to AC power charging mode.

5. The hybrid power control device for the telescopic boom crawler crane according to claim 4, characterized in that, The control unit is also equipped with an intelligent hybrid mode. The working logic of the intelligent hybrid mode is as follows: when there is a high power demand during luffing / slewing / lifting, it automatically switches to the motor mode; when the engine is idling, it automatically switches to pure electric mode. The intelligent hybrid mode supports manually turning off this function.

6. The hybrid power control device for the telescopic boom crawler crane according to claim 5, characterized in that, The control unit is connected to the control screen located on the upper part of the vehicle body via a CAN bus, and displays the system status and fault information in real time. The startup logic of the control unit is as follows: detect the connection status of the charging interface and the power of the battery module. When the mains power connection is stable, force the vehicle to enter the power-driving state. When there is no mains power connection, select the pure electric mode or the engine mode according to the power threshold of the battery module.

7. The hybrid power control device for the telescopic boom crawler crane according to claim 4, characterized in that, The battery system has a capacity of 200 kWh and a charge / discharge rate of 0.6c.

8. The hybrid power control device for the telescopic boom crawler crane according to claim 6, characterized in that, The OBC module supports automatic master-slave allocation via the CAN bus when multiple units are connected in parallel, and dynamically allocates charging power according to the battery module's power and load requirements.

9. The hybrid power control device for the telescopic boom crawler crane according to claim 2, characterized in that, The DC charging port and AC power interface are located on the side of the lower part of the vehicle body near the tracks, and are electrically connected to the electrical system located on the upper part of the vehicle body through the central rotary joint.

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