Pure electric control device for a crawler crane

Abstract

The utility model discloses a pure electric control device of crawler crane, include: battery system, TMS constant temperature system, integration unit, double -mode charging interface, control unit, comprehensive cooling system and power execution mechanism, battery system includes battery and integrated setting's BMS battery management module, integration unit supports multi -machine parallel connection and intelligent power distribution, and control unit is switched to any one of five kinds of operation modes according to the mains connection state, battery capacity and load demand automatically, and comprehensive cooling system is through temperature sensor real -time monitoring motor, hydraulic system, integration unit's temperature. The utility model integration unit supports OBC multi -machine parallel connection and PDU power dynamic distribution, and TMS system realizes -35 DEG C~65 DEG C full temperature domain protection, and control unit is based on real -time data prediction switching opportunity, and the great improvement energy utilization rate, reduces energy consumption and pollution, and integrated design is convenient to install and maintain, and intelligent control reduces manual intervention, and supports energy recovery, and improves economy.

Description

Technical Field

[0001] This utility model relates to the field of electric engineering machinery technology, and in particular to a pure electric control device for a crawler crane. Background Technology

[0002] In the current environment of rising fuel costs and increasingly stringent environmental protection laws and regulations, pure electric construction machinery can reduce fuel consumption, reduce pollution emissions, and protect the environment. Powered by battery systems or mains electricity, it can also greatly reduce noise pollution, which is in line with the upcoming new energy trend. Most existing crawler cranes are fuel-powered crawler cranes, which have high fuel costs, high pollution, and extremely high noise during operation.

[0003] In existing technologies, pure electric control devices lack intelligent multi-mode switching and energy management functions, making it difficult to adapt to complex working conditions. Current fuel-powered crawler cranes suffer from three major pain points: ① Diesel consumption costs account for more than 45% of operating costs; ② NOx emissions exceed standards; ③ Operating noise exceeds 85dB. Although there have been attempts at electrification, they generally suffer from the following problems: charging and operation cannot be carried out simultaneously; battery performance drops sharply in low-temperature environments; and energy recovery efficiency is less than 15%.

[0004] This utility model integrates multiple modules and control units. The control unit is the core of the control device. All functions are adjusted based on the information reading, processing, judgment and signal return of the control unit to make the motor work in the optimal state, maximize the use of clean energy while ensuring efficiency, reduce fuel emissions and improve economy. The control unit is connected to the control screen via a CAN cable, 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. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a pure electric control device for crawler cranes that can intelligently switch between five working modes, is highly efficient, environmentally friendly, intelligent, and suitable for various complex working conditions.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] A pure electric control device for a crawler crane includes: a battery system, a TMS (Thermal Management System) temperature control system, an integrated unit, a dual-mode charging interface, a control unit, a comprehensive cooling system, and a power actuator. The battery system includes a battery and a BMS (Battery Management System) module integrated on the battery. The battery system has a capacity ≥200.54 kWh and a charge / discharge rate ≥0.6C. The TMS temperature control system maintains the battery system's operating temperature within the range of -35°C to 65°C. The integrated unit includes an OBC (On-Board Control) module, a PDU (Power Distribution Unit) module, an AC-DC (Analog-to-DC) module, and a DC-DC (Digital-to-Digital) module. The integrated unit supports multi-machine parallel operation and intelligent power distribution. The dual-mode charging interface includes a mains power connection interface. The system includes a DC charging port, a mains power connection interface located on the side of the machine body near the tracks, a central rotary joint connecting the mains power connection interface to the integrated unit, and a DC charging port connecting the DC charging port to the battery system via the central rotary joint. The control unit connects to each component via a CAN bus and acquires operating data in real time. The control unit automatically switches between any one of the following modes based on the mains power connection status, battery power, and load requirements: trolley operation mode, operation charging mode, battery operation mode, mains power charging mode, and DC charging mode. The power actuator includes a motor and a hydraulic system. The integrated cooling system monitors the temperature of the motor, hydraulic system, and integrated unit in real time via a temperature sensor.

[0008] In the above structure, when the mains connection interface is connected and meets safety standards, the control unit activates the power-assisted operation mode, where the mains power drives the motor via the integration unit. In the power-assisted operation mode, if the battery power is below a threshold and the mains power is redundant, the operation charging mode is simultaneously activated to charge the battery. When the mains power is not connected and the battery power meets the operating requirements, the control unit activates the battery operation mode, where the battery drives the motor via the integration unit. When the equipment is stopped and the mains power is connected, the mains power charging mode is activated to charge the battery. When the DC charging port is connected to a power source, the control unit activates the DC charging mode to directly charge the battery.

[0009] In the above structure, in the working charging mode or the mains charging mode, the control unit monitors the battery SOC status in real time. When the SOC reaches 100%, it automatically cuts off the charging circuit and maintains the power-driving working mode, generates an overcharge protection log, and transmits it to the control panel through the CAN bus.

[0010] In the above structure, the OBC module supports a multi-machine parallel topology. Based on the master-slave automatic allocation mechanism of the CAN bus, the PDU module dynamically adjusts the output power of each machine according to the load demand to ensure that the charging and discharging efficiency is maximized.

[0011] In the above structure, the TMS constant temperature system includes a distributed temperature sensor network and a bidirectional PTC heating / liquid cooling circulation module.

[0012] In the above structure, the mains connection interface is equipped with a connection status detection circuit, an overvoltage / undervoltage protection relay, and a quick-plug mechanism. The quick-plug mechanism has a waterproof rating of IP68. The mains connection interface can be connected to mains power for power-assisted operation, or it can charge the battery system and perform power-assisted operation through the integrated unit, or it can charge the battery system independently.

[0013] In the above structure, the battery system adopts a modular independent unit design, realizes self-diagnosis and fault feedback through the BMS battery management module, supports CAN bus communication, is compatible with multiple voltage platforms, and is equipped with a quick-release interface for easy replacement and maintenance.

[0014] In the above structure, the motor is a permanent magnet synchronous motor. When the heavy object is lowered, the motor switches to generator mode to charge the battery system in reverse. The constant torque output range of the motor covers the speed range of 0-3000rpm, and the energy recovery efficiency of the motor is ≥23%.

[0015] In the above structure, the integrated cooling system includes: a three-channel independent cooling circuit, a control module for a variable frequency fan based on temperature gradient prediction, and the three-channel independent cooling circuit integrates a hydraulic system, an integration unit, and a motor cooling channel.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention enables automated intelligent control. During operation, the control unit can flexibly switch intelligently between different modes based on working conditions and equipment status, improving control precision while ensuring optimal efficiency. After operation, when the vehicle enters mains charging or DC charging mode, the control unit provides charging protection for the battery system. The charging process requires no human supervision and is fully automated and intelligently controlled. The charging protection function ensures the battery system disconnects promptly when fully charged, preventing overcharging hazards and energy waste. It achieves intelligent switching between five working modes to adapt to complex working conditions. The integrated unit supports OBC multi-machine parallel operation and PDU power dynamic allocation. The TMS system provides full-temperature protection from -35℃ to 65℃. The control unit predicts switching timing based on real-time data. The permanent magnet motor supports over 23% energy recovery, solving the high pollution and high noise problems of traditional fuel-powered cranes and improving energy utilization by 30%. This invention features efficient energy management, reduced energy consumption and pollution, integrated design for easy installation and maintenance, intelligent control to reduce manual intervention, and support for energy recovery, thus improving economic efficiency. Attached Figure Description

[0018] Figure 1 This is a structural block diagram of an embodiment of the pure electric control device for a crawler crane according to this utility model;

[0019] Figure 2 This is one of the structural schematic diagrams of the machine body in the embodiment of the pure electric control device of the crawler crane of this utility model;

[0020] Figure 3 This is an embodiment of the pure electric control device for the crawler crane of this utility model. Figure 2 A partial structural diagram;

[0021] Figure 4 This is the second schematic diagram of the machine body in the embodiment of the pure electric control device of the crawler crane of this utility model.

[0022] In the diagram, 1-Battery system, 2-MS constant temperature system, 3-Integrated unit, 4-Control unit, 5-Comprehensive cooling system, 6-Main power connection interface, 7-DC charging port, 8-Main body, 9-Motor, 10-Hydraulic pump. 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 1-4As shown, a pure electric control device for a crawler crane includes: a battery system 1, a TMS (Thermal Management System) temperature control system 2, an integrated unit 3, a dual-mode charging interface, a control unit 4, a comprehensive cooling system 5, and a power actuator. The battery system 1 includes a battery and a BMS (Battery Management System) module integrated on the battery. The battery system 1 has a capacity ≥ 200.54 kWh and a charge / discharge rate ≥ 0.6C. The TMS temperature control system 2 maintains the operating temperature of the battery system 1 within the range of -35℃ to 65℃. The integrated unit 3 includes an OBC (On-Board Control) module, a PDU (Power Distribution Unit) module, an AC-DC (Anti-DC) module, and a DC-DC (DC-DC) module. The integrated unit 3 supports multi-machine parallel operation and intelligent power distribution. The dual-mode charging interface includes a mains power supply. Connection interface 6 and DC charging port 7 are provided. The AC power connection interface 6 is located on the side of the machine body 8 and near the track. The AC power connection interface 6 is connected to the integration unit 4 through the central rotary joint. The DC charging port 7 is connected to the battery system 1 through the central rotary joint. The control unit 4 is connected to each component through the CAN bus and obtains operating data in real time. The control unit 4 automatically switches to any one of the following modes according to the AC power connection status, battery power and load requirements: trolley operation mode, operation charging mode, battery operation mode, AC power charging mode and DC charging mode. The power actuators include the motor 9 and the hydraulic system. The integrated cooling system 5 monitors the temperature of the motor 9, the hydraulic system and the integration unit 3 in real time through temperature sensors.

[0025] Specifically, in this embodiment, when the mains connection interface 6 is connected to mains power, the mains power is used to power the motor 9 for operation, i.e., the power-assisted operation mode; in the power-assisted operation mode, the mains power can power the motor 9 for operation while simultaneously charging the battery system 1 through the integration unit 3, i.e., the operation charging mode; when the mains connection interface 6 is not connected to mains power, the battery system 1 is used to power the motor 9 for operation through the integration unit 3, i.e., the battery operation mode; when no operation is being performed, the mains connection interface 6 can be used to connect to mains power and the battery system 1 can be charged through the integration unit 3, i.e., the mains charging mode; alternatively, the DC charging port can be used to directly charge the battery system 1, i.e., the DC charging mode.

[0026] Specifically, in this embodiment, the hydraulic system includes a hydraulic pump 10 and related pipelines and control devices. The hydraulic pump 10 is the actuator used for various operations.

[0027] Specifically, in this embodiment, the control unit intelligently switches between five operating modes: traction power operation mode, power charging mode, battery operation mode, mains power charging mode, and DC charging mode. In battery operation mode, the control unit 4 calculates the remaining operating time T = (current SOC - safety threshold) / instantaneous power consumption in real time. When T < 15 minutes, a mains power connection warning is issued via the control panel. If mains power is not connected, the hydraulic pump output power is gradually reduced until the machine stops.

[0028] Specifically, in this embodiment, the integration unit integrates the OBC on-board charger, the PDU power distribution unit, the AC-DC rectifier module, and the DC-DC converter module.

[0029] Specifically, in this embodiment, energy efficiency is maximized: the working charging mode reduces charging downtime by 40%; all-condition adaptability: the TMS system expands the applicable regions of the equipment to cold / tropical zones; and intelligent safety protection: the dual-level overcharge protection mechanism extends the battery life cycle by more than 2,000 times.

[0030] In a preferred embodiment of this utility model, when the mains connection interface 6 is connected and meets safety standards, the control unit 4 starts the power-driving operation mode, and the mains power drives the motor 9 through the integration unit 3. In the power-driving operation mode, if the battery power is lower than the threshold and the mains power is redundant, the operation charging mode is started simultaneously to charge the battery. When the mains power is not connected and the battery power meets the working conditions, the control unit 4 starts the battery operation mode, and the battery drives the motor 9 through the integration unit 3. When the equipment is stopped and the mains power is connected, the mains power charging mode is started to charge the battery. When the DC charging port 7 is connected to the power supply, the control unit 4 starts the DC charging mode to charge the battery directly.

[0031] Specifically, in this embodiment, the integration unit 3 is an integrated unit cabinet that integrates the OBC on-board charging system, the PDU power distribution unit, the AC-DC rectifier module, and the DC-DC converter module.

[0032] Specifically, in this embodiment, the OBC can select a multi-machine parallel connection scheme based on the remaining power of the battery system 1 and the load demand. The master and slave machines are automatically assigned through the CAN bus without physical distinction. The PDU can intelligently allocate the output power of each machine to ensure that the charging and discharging efficiency is maximized.

[0033] Specifically, in this embodiment, the DC charging port 7 can be directly connected to a DC power source to charge the battery system 1 and has functions such as communication diagnostics and connection detection. DC charging has advantages such as high power and fast charging, which can reduce charging waiting time and is suitable for urgent use and inconvenient to carry out electric work. The DC charging port 7 is connected to the vehicle battery system 1 for charging through a central rotary connector.

[0034] Specifically, in this embodiment, the control unit 4 acquires all information, including the status of the DC charging port 7 and the mains connection interface 6, the battery system 1 power information, the working status of the integration unit 3, and the current required power and actual power of the motor 9. After acquiring the information, it performs intelligent judgment processing, calculates data considering all situations, selects the optimal solution, and returns the result to each part in the form of a control signal. The vehicle is controlled to make adjustments through this signal so as to automatically and flexibly select and switch working states. The control unit 4 is the core part of the pure electric control device of the electric crawler crane.

[0035] In a preferred embodiment of this utility model, in either the working charging mode or the mains charging mode, the control unit 4 monitors the SOC status of the battery in real time. When the SOC reaches 100%, the charging circuit is automatically cut off and the battery is kept in the power-down working mode. An overcharge protection log is generated and transmitted to the control panel via the CAN bus.

[0036] In a preferred embodiment of this invention, the OBC module supports a multi-machine parallel topology. Based on the master-slave automatic allocation mechanism of the CAN bus, the PDU module dynamically adjusts the output power of each machine according to the load requirements to ensure that the charging and discharging efficiency is maximized.

[0037] Specifically, in this embodiment, the OBC module supports parallel operation of multiple units, automatically assigns master and slave roles via the CAN bus, and the PDU module intelligently allocates output power according to load requirements to maximize charging and discharging efficiency.

[0038] In a preferred embodiment of this invention, the TMS constant temperature system 2 includes a distributed temperature sensor network and a bidirectional PTC heating / liquid cooling circulation module.

[0039] Specifically, in this embodiment, the ambient storage temperature of the battery system 1 is -35℃ to 65℃. When stored for a long time, the ambient temperature should be controlled below 35℃, the operating temperature of the battery system 1 should be controlled between -35℃ and 65℃, and the charging temperature should be controlled between 0℃ and 65℃. However, when the vehicle enters extreme weather conditions, the temperature may not meet the requirements. At this time, the TMS constant temperature system 2 will protect the battery and keep the battery temperature at the required temperature.

[0040] In a preferred embodiment of this utility model, the mains connection interface 6 is provided with a connection status detection circuit, an overvoltage / undervoltage protection relay, and a quick-plug mechanism. The quick-plug mechanism has a waterproof rating of IP68. The mains connection interface 6 can be connected to the mains for power-drawing operations or can be used to charge the battery system 1 and perform power-drawing operations through the integrated unit 3 or to charge the battery system 1 independently.

[0041] Specifically, in this embodiment, the mains power connection interface 6 can be connected to the mains power for tethered operation or charged to the battery system 1 via the integration unit 3 for tethered operation or charged separately for the battery system 1. The interface also has connection detection and safety protection functions. In order to facilitate the vehicle to turn and move, the mains power connection interface 6 is located at the undercarriage track and connected to the upper vehicle integration unit 3 via the central rotary joint, so that it can better adapt to small terrain and perform complex operations when tethered.

[0042] In a preferred embodiment of this utility model, the battery system 1 adopts a modular independent unit design, realizes self-diagnosis and fault feedback through the BMS battery management module, supports CAN bus communication, is compatible with multiple voltage platforms, and is equipped with a quick-release interface for easy replacement and maintenance.

[0043] Specifically, in this embodiment, the BMS (Battery Management System) in battery system 1 has a capacity of 200.54 kWh and a charge / discharge rate of 0.6C, which fully meets the requirements for the vehicle to work for 4-8 hours in battery operation mode. Battery system 1 is an independent module, connected via CANBUS communication, and equipped with BMS (Battery Management System) for easy system management, self-diagnosis, and fault feedback. It is also compatible with various voltage platforms and can be used in conjunction with other components such as integrated unit 3 and motor 9.

[0044] In a preferred embodiment of this utility model, the motor 9 is a permanent magnet synchronous motor. When the heavy object is lowered, the motor 9 is converted into a generator mode to charge the battery system 1 in reverse. The constant torque output range of the motor 9 covers the speed range of 0-3000rpm, and the energy recovery efficiency of the motor 9 is ≥23%.

[0045] Specifically, in this embodiment, the motor 9 is the power source of the equipment and has the characteristics of constant torque and high speed. When the motor 9 is working, it drives the hydraulic pump 10 to perform various actions of the equipment. When the motor 9 is not working, it charges the battery in reverse to achieve energy recovery.

[0046] In a preferred embodiment of this utility model, the integrated cooling system 5 includes a three-channel independent cooling circuit, a control module for a variable frequency fan based on temperature gradient prediction, an integrated hydraulic system, an integrated unit, and a motor cooling channel.

[0047] Specifically, in this embodiment, when the integrated cooling system 5 is in operation, the hydraulic system, the integrated unit 3 and the motor 9 will generate a lot of heat and the temperature will rise sharply. At this time, the integrated cooling system 5 reads the temperature signals of the hydraulic system, the integrated unit 3 and the motor 9 through the control unit 4, intelligently judges the temperature and runs the system to cool down and protect the hydraulic system, the integrated unit 3 and the motor 9. The integrated cooling system 5 has a high degree of integration, is easy to install and debug, and intelligently allocates the cooling status of each system.

[0048] A control method for a pure electric control device of a crawler crane, the control method specifically includes the following steps:

[0049] S1: Upon power-on, detect the mains power connection status and the battery SOC, and display them on the control screen;

[0050] S2: During operation, the battery power is compared with the working requirement threshold in real time, and the working mode is selected and automatically switched to any one of the following working modes according to the working conditions: the power-driving operation mode, the operation charging mode, the battery operation mode, the mains charging mode, and the DC charging mode.

[0051] S3: Monitor temperature, power and SOC parameters in real time during operation;

[0052] S4: Dynamically switch the working mode based on a multi-objective optimization algorithm;

[0053] S5: When charging is complete, the charging protection mechanism is automatically activated until charging is finished, and the power-off protection is automatically executed and an operation report is generated.

[0054] Example 2

[0055] Example of mode switching scenario for this utility model: After the crane is connected to 380V mains power at the construction site, the control unit automatically enters the traction operation mode (SOC=65%). During the hoisting operation, a redundancy of 200kW of mains power is detected, and the operation charging mode is started simultaneously. After 2 hours, the SOC reaches 95%, and charging automatically stops (maintaining traction operation). In the event of a sudden mains power interruption, the system switches to battery operation mode within 0.5 seconds. If the mains power is not disconnected after the operation, the system automatically switches to mains charging mode until SOC=100%. Extreme working condition response: When the ambient temperature is -28℃, the TMS system starts PTC heating to maintain the electrolyte temperature >0℃. When the hydraulic system overheats, the integrated cooling system distributes 70% of the air volume to the hydraulic circuit.

[0056] Specifically, the working principle of this utility model is as follows:

[0057] During use, when the electric tracked crane is powered on before starting, the control unit 4 obtains the connection status of the current mains connection interface 6 and the battery system 1 power information, and transmits them to the control screen. This allows the driver to fully understand the current vehicle status before starting work, prepare for entering the working state, and facilitates flexible control of the vehicle to enter different modes.

[0058] When the mains connection interface 6 is connected to the mains power and meets the standards, the control unit 4 controls the vehicle to directly enter the electric towing operation mode. The mains power supplies the motor through the integration unit 3 to drive the hydraulic pump 10 for operation. At the same time, the control unit 4 automatically detects the battery system 1's power information and the motor 9's output power. If the battery system 1's power is insufficient for the battery operation mode and the motor 9's output power still has surplus power after meeting the electric towing operation requirements, the vehicle enters the operation charging mode. In this mode, the mains power is used to drive the motor 9 through the integration unit 3 to drive the hydraulic pump 10 while charging the battery system 1. In this mode, when the battery system 1 is fully charged, the control unit 4 receives the battery system 1's power information and immediately and automatically controls the battery system 1 to disconnect from charging to protect the battery system 1 from overcharging. At this time, the vehicle exits the operation charging mode and returns to the electric towing operation mode, that is, the mains power continues to supply the motor 9 through the integration unit 3, and the motor 9 only drives the hydraulic pump 10 for operation. If the mains connection interface 6 does not meet the safety standards during the electric towing operation, the connection detection and safety protection function of the mains connection interface 6 will send a signal to the control unit 4, warning the driver to stop the operation and get out of the vehicle to check and rectify the problem.

[0059] When the electric tripping operation is completed and the vehicle is turned off, if the AC power connection is still active, the control unit 4 will again determine the battery system 1 based on the collected information. If the battery system 1 has a low charge, it will use AC power to charge the battery system 1 through the integration unit 3, and the vehicle will enter AC power charging mode. In this mode, there is no need for manual waiting to disconnect the AC power connection. The control unit 4 intelligently detects in real time and automatically disconnects the battery system 1 from the AC power connection when it is fully charged, protecting the battery system 1 and preventing continuous waste of electrical energy without disconnecting the AC power connection interface 6.

[0060] If the mains connection interface 6 is not connected to the mains power, the control unit 4 will detect the battery system 1's power level. If the current battery system 1's power level meets the requirements of the battery operation mode, it will enter the battery operation mode. In the battery operation mode, the battery system 1 connects to the motor 9 via the integration unit 3 to drive the hydraulic pump 10 for operation. During operation, the control unit 4 continues to read the battery system 1's power level and compare it with the vehicle's operating status information in real time. Once the battery system 1's power level does not meet the requirements of the battery operation mode, the control unit 4 will immediately display a notification on the control screen to inform the driver to connect the mains connection interface 6 to the mains power to enter either the electric charging mode or the work charging mode.

[0061] When the work location is inconvenient or does not support tethered work, a portable DC power supply can be used to charge the battery system 1 directly through the DC charging port 7. This charging process is highly efficient, saving charging time and improving work efficiency.

[0062] This utility model application discloses a pure electric control device for an electric crawler crane with five modes: trolley-powered operation mode, operation and charging mode, battery operation mode, mains charging mode, and DC charging mode. These five modes are controlled through real-time detection and signal transmission from the control unit, offering advantages such as accurate judgment, stable control, flexible switching, and timely display. This ensures the vehicle has sufficient power performance, smoothly entering the corresponding operation, and is suitable for various complex working conditions. This utility model addresses the shortcomings of existing technologies through multi-module collaborative control, while also emphasizing energy conservation and pollution reduction, aligning with national future trends.

[0063] 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., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for 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. Therefore, they should not be construed as limitations on 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.

[0064] 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.

[0065] 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 pure electric control device for a crawler crane, characterized in that, include: The system comprises a battery system, a TMS (Thermal Management System) temperature control system, an integrated unit, a dual-mode charging interface, a control unit, a comprehensive cooling system, and a power actuator. The battery system includes a battery and a BMS (Battery Management System) module integrated on the battery. The battery system has a capacity ≥200.54 kWh and a charge / discharge rate ≥0.6C. The TMS temperature control system maintains the battery system's operating temperature within the range of -35°C to 65°C. The integrated unit includes an OBC (On-Board Control) module, a PDU (Power Distribution Unit) module, and AC-DC and DC-DC modules. The integrated unit supports multi-unit parallel operation and intelligent power distribution. The dual-mode charging interface includes an AC power connection interface and a DC charging port. The connection interface is located on the side of the machine body and near the tracks. The mains power connection interface is connected to the integrated unit through a central rotary joint. The DC charging port is connected to the battery system through the central rotary joint. The control unit is connected to each component through a CAN bus and obtains operating data in real time. The control unit automatically switches to any one of the following modes based on the mains power connection status, battery power, and load requirements: trolley operation mode, operation charging mode, battery operation mode, mains power charging mode, and DC charging mode. The power actuator includes a motor and a hydraulic system. The integrated cooling system monitors the temperature of the motor, hydraulic system, and integrated unit in real time through a temperature sensor.

2. The pure electric control device for a crawler crane according to claim 1, characterized in that, When the mains connection interface is connected and meets safety standards, the control unit activates the power-assisted operation mode, where the mains power drives the motor via the integration unit. In the power-assisted operation mode, if the battery level is below a threshold and the mains power is redundant, the charging mode is simultaneously activated to charge the battery. When the mains power is not connected and the battery level meets the operating requirements, the control unit activates the battery operation mode, where the battery drives the motor via the integration unit. When the equipment is stopped and the mains power is connected, the mains charging mode is activated to charge the battery. When the DC charging port is connected to a power source, the control unit activates the DC charging mode to directly charge the battery.

3. The pure electric control device for a crawler crane according to claim 2, characterized in that, In the operation charging mode or mains charging mode, the control unit monitors the battery SOC status in real time. When the SOC reaches 100%, it automatically cuts off the charging circuit and maintains the power-driving operation mode, generates an overcharge protection log, and transmits it to the control panel via the CAN bus.

4. The pure electric control device for a crawler crane according to claim 1, characterized in that, The OBC module supports a multi-machine parallel topology. Based on the master-slave automatic allocation mechanism of the CAN bus, the PDU module dynamically adjusts the output power of each machine according to the load demand to ensure that the charging and discharging efficiency is maximized.

5. The pure electric control device for a crawler crane according to claim 2, characterized in that, The TMS constant temperature system includes a distributed temperature sensor network and a bidirectional PTC heating / liquid cooling circulation module.

6. The pure electric control device for a crawler crane according to claim 2, characterized in that, The mains connection interface is equipped with a connection status detection circuit, an overvoltage / undervoltage protection relay, and a quick-plug mechanism. The quick-plug mechanism has an IP68 waterproof rating. The mains connection interface can be connected to mains power for power-assisted operation, or it can charge the battery system and perform power-assisted operation through the integrated unit, or it can charge the battery system independently.

7. The pure electric control device for a crawler crane according to claim 1, characterized in that, The battery system adopts a modular independent unit design, and realizes self-diagnosis and fault feedback through the BMS battery management module. The battery system supports CAN bus communication, is compatible with multiple voltage platforms, and is equipped with a quick-release interface for easy replacement and maintenance.

8. The pure electric control device for a crawler crane according to claim 2, characterized in that, The motor is a permanent magnet synchronous motor. When the heavy object is lowered, the motor switches to generator mode and charges the battery system in reverse. The constant torque output range of the motor covers the speed range of 0-3000rpm, and the energy recovery efficiency of the motor is ≥23%.

9. The pure electric control device for a crawler crane according to claim 1, characterized in that, The integrated cooling system includes: a three-channel independent cooling circuit, a control module for a variable frequency fan based on temperature gradient prediction, and the three-channel independent cooling circuit integrates a hydraulic system, an integration unit, and a motor cooling channel.

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