Electric power supply system of extended-range crane and control method of electric power supply system

Abstract

The invention discloses an electric power supply system of an extended-range crane and a control method of the electric power supply system. An upper vehicle and a chassis are respectively provided with a storage battery and a power switch, and the electric power supply system further comprises a plurality of relays. The device can adapt to the overall configuration condition of the extended-range crane, it is guaranteed that power supply between the upper vehicle and the chassis is cut off when the main switch is powered off, and the safety performance of the whole vehicle is improved.

Description

Technical Field

[0001] The invention relates to an extended-range crane, and in particular to an electrical power supply system for the extended-range crane and a control method thereof. Background Art

[0002] The range-extended crane is based on the traditional fuel crane, with an electric motor and battery pack added to generate electricity to provide driving range. The travel of the range-extended crane relies on power batteries, which can be charged by the engine to ensure driving range; there are multiple modes for lifting operations, including plug-in mode, engine mode, motor mode, and hybrid mode. The range-extended crane can effectively improve the chassis range and lifting energy saving, while taking into account the needs of energy conservation, emission reduction, and green environmental protection. The overall configuration of the range-extended crane is as follows: Figure 1 As shown, the power system for chassis driving operations and on-board lifting operations is configured on the vehicle, and the power battery is configured on the chassis. Due to its special overall configuration, the extended-range crane requires the design of a low-voltage electrical system power supply management solution.

[0003] Existing technical solution 1: The power source of a general single-engine wheeled crane is configured on the chassis, the main switch of the whole machine is configured on the chassis, and the battery box is configured on the chassis. Since a conventional single-engine wheeled crane has only one battery box and there is no power system on the vehicle, there is no need to configure a battery box, so its power supply management method cannot be applied to an extended-range crane with a power system configured on the vehicle.

[0004] Existing technical solution 2: The twin-engine wheeled crane is equipped with two power sources, and the upper vehicle and chassis are equipped with separate battery boxes and power systems. Conventional twin-engine wheeled cranes have separate power switches on the upper vehicle and chassis. Since the upper vehicle battery box needs to be activated to supply power to the high-voltage power system when the extended-range crane is powered on the chassis, this power supply system is not suitable for the overall configuration of the extended-range crane. Summary of the invention

[0005] Purpose of the invention: In view of the above problems, the present invention proposes an electrical power supply system for an extended-range crane and a control method thereof, which can adapt to the overall configuration of the extended-range crane and ensure that the power supply between the vehicle and the chassis is disconnected when the main switch is powered off, thereby improving the safety performance of the entire vehicle.

[0006] Technical solution: The technical solution adopted by the present invention is an electrical power supply system for an extended-range crane, in which the vehicle and the chassis are each equipped with a battery and a power switch, and also include a plurality of relays; the chassis is provided with a main power switch S0, and the chassis battery G2 supplies power to the chassis electrical system through the main power switch S0 and then through the switch part of the first relay K4; the chassis battery G2 supplies power to the coil part of the first relay K4 through the main power switch S0 and then through the chassis power switch S2; the chassis battery G2 supplies power to the coil part of the third relay K0 through the main power switch S0; the chassis battery G2 supplies power to the vehicle electrical system through the main power switch S0 and then through the switch part of the first relay K4 and the switch part of the fifth relay K2; the vehicle battery G1 supplies power to the vehicle electrical system through the switch part of the third relay K0 and then through the switch part of the fourth relay K1; the vehicle battery G1 supplies power to the coil part of the fourth relay K1 and the coil part of the fifth relay K2 in parallel through the switch part of the third relay K0 and then through the vehicle power switch S1.

[0007] After the main power switch S0 is activated, the coil part of the third relay K0 is energized, so that the switch part of the third relay K0 is closed; after the switch part of the third relay K0 is closed, the chassis power switch S2 is activated separately, the coil part of the first relay K4 is energized, so that the switch part of the first relay K4 is closed, and the chassis battery supplies power to the chassis electrical system; after the switch part of the third relay K0 is closed, the on-board power switch S1 is activated separately, the coil part of the fourth relay K1 is energized, so that the switch part of the fourth relay K1 is closed, and power is supplied to the on-board electrical system, and at the same time, the coil part of the fifth relay K2 is energized, so that the switch part of the fifth relay K2 is closed, and the on-board power-on signal is transmitted to the chassis, activating the functions required for on-board operation in the chassis electrical system.

[0008] On the basis of the above-mentioned extended-range crane electrical power supply system, a switch part of a second relay K3 is added between the chassis electrical system power supply output terminal and the switch part of the fifth relay K2, and the switch part of the second relay K3 is in a normally closed state; the coil part of the second relay K3 and the coil part of the first relay K4 are connected in series.

[0009] The improved extended-range crane electrical power supply system is as follows: after the main power switch S0 is activated, the coil part of the third relay K0 is energized, so that the switch part of the third relay K0 is closed; after the switch part of the third relay K0 is closed, the vehicle power switch S1 is activated, the coil parts of the fourth relay K1 and the fifth relay K2 are energized, so that the switch parts of the fourth relay K1 and the fifth relay K2 are closed, the vehicle electrical system is energized, and the chassis electrical system is energized at the same time; after the switch part of the third relay K0 is closed, the chassis power switch S2 is activated, the coil parts of the first relay K4 and the second relay K3 are energized, so that the switch part of the first relay K4 is closed, and the second relay K3 is changed from a normally closed state to a normally open state, so that the chassis and vehicle circuits are disconnected, and the chassis circuit is powered by the chassis battery; after the chassis and vehicle circuits are disconnected, the main power switch S0 is disconnected, and the whole vehicle is powered off.

[0010] A power supply control method applied to the electrical power supply system of a first extended-range crane, after the main power switch S0 is activated, the coil part of the third relay K0 is energized, so that the switch part of the third relay K0 is closed; after the switch part of the third relay K0 is closed, the chassis power switch S2 is activated separately, the coil part of the first relay K4 is energized, so that the switch part of the first relay K4 is closed, and the chassis battery supplies power to the chassis electrical system; after the switch part of the third relay K0 is closed, the vehicle power switch S1 is activated separately, the coil part of the fourth relay K1 is energized, so that the switch part of the fourth relay K1 is closed, and the vehicle electrical system is powered, and at the same time, the coil part of the fifth relay K2 is energized, so that the switch part of the fifth relay K2 is closed, and the vehicle power-on signal is transmitted to the chassis, activating the functions required for vehicle-on operations in the chassis electrical system.

[0011] A power supply control method applied to the second improved extended-range crane electrical power supply system, after the main power switch S0 is activated, the coil part of the third relay K0 is energized, so that the switch part of the third relay K0 is closed; after the switch part of the third relay K0 is closed, the vehicle power switch S1 is activated, the coil parts of the fourth relay K1 and the fifth relay K2 are energized, so that the switch parts of the fourth relay K1 and the fifth relay K2 are closed, the vehicle electrical system is energized, and the chassis electrical system is energized at the same time; after the switch part of the third relay K0 is closed, the chassis power switch S2 is activated, the coil parts of the first relay K4 and the second relay K3 are energized, so that the switch part of the first relay K4 is closed, and the second relay K3 is changed from a normally closed state to a normally open state, so that the chassis and the vehicle circuit are disconnected, and the chassis circuit is powered by the chassis battery; after the chassis and the vehicle circuit are disconnected, the main power switch S0 is disconnected, and the whole vehicle is powered off.

[0012] Based on the design concept of the second improved extended-range crane electrical power supply system, the present invention also proposes a third extended-range crane electrical power supply system, wherein the upper vehicle and the chassis are each equipped with a battery and a power switch, and also include a control module, a plurality of relays and a diode V1; the chassis is provided with a main power switch S0, and the chassis battery G2 supplies power to the chassis electrical system through the main power switch S0 and then through the switch part of the first relay K4; the chassis battery G2 supplies power to the coil part of the third relay K0 through the main power switch S0; the chassis battery G2 inputs a chassis power supply signal to the second input terminal CM:IN2 of the control module through the main power switch S0 and then through the chassis power switch S2; the first output port CM:OUT1 of the control module supplies power to the coil part of the first relay K4; the chassis A diode V1 is reversely connected between the power switch S2 of the panel and the first output port CM:OUT1 of the control module; the on-board battery G1 supplies power to the on-board electrical system through the switch part of the third relay K0 and then through the switch part of the fourth relay K1; the on-board battery G1 inputs the on-board power supply signal to the first input port CM:IN1 of the control module through the switch part of the third relay K0, the switch part of the fourth relay K1, and then through the switch part of the fifth relay K2; the on-board battery G1 supplies power to the on-board electrical system through the switch part of the third relay K0 and then through the switch part of the fourth relay K1; the on-board battery G1 supplies power to the coil part of the fourth relay K1 and the coil part of the fifth relay K2 through the switch part of the third relay K0 and then through the on-board power switch S1.

[0013] After the main power switch S0 is activated, the coil part of the third relay K0 is energized, and the switch part of the activated third relay K0 is closed; after the switch part of the third relay K0 is closed, the on-board power switch S1 is activated, and the coil part of the fourth relay K1 is energized, so that the switch part of the fourth relay K1 is closed, and the on-board battery supplies power to the on-board electrical system, and at the same time inputs the on-board power supply signal to the port CN:IN1 of the control module; after the control module receives the on-board power supply signal, the port CM:OUT1 of the control module outputs a voltage to supply power to the coil part of the first relay K4, so that the switch part of the first relay K4 is closed, The chassis battery supplies power to the chassis electrical system, and the power supply of the chassis electrical system is controlled by the vehicle at this time; when the power supply of the chassis electrical system is controlled by the vehicle, the chassis power switch S2 is closed, and the chassis power supply signal is input to the control module CM:IN2. After the control module receives the chassis power supply signal, the port CM:OUT1 of the control module stops outputting voltage, and the coil part of the first relay K4 loses power, so that the switch part of the first relay K4 is disconnected. At this time, the power supply of the chassis electrical system is no longer controlled by the vehicle; when the power supply of the chassis electrical system is not controlled by the vehicle, the main power switch S0 is disconnected, and the whole vehicle is powered off.

[0014] A power supply control method applied to the electrical power supply system of the third extended-range crane, after the control module receives the vehicle power supply signal, the port CM:OUT1 of the control module outputs the voltage; after the control module receives the chassis power supply signal, the port CM:OUT1 of the control module stops outputting the voltage.

[0015] Specifically, after the main power switch S0 is activated, the coil part of the third relay K0 is energized, and the switch part of the activated third relay K0 is closed; after the switch part of the third relay K0 is closed, the on-board power switch S1 is activated, and the coil part of the fourth relay K1 is energized, so that the switch part of the fourth relay K1 is closed, and the on-board battery supplies power to the on-board electrical system, and at the same time, the on-board power supply signal is input to the port CN:IN1 of the control module; after the control module receives the on-board power supply signal, the port CM:OUT1 of the control module outputs a voltage to supply power to the coil part of the first relay K4, so that the switch part of the first relay K4 is closed. The chassis battery supplies power to the chassis electrical system, and the power supply of the chassis electrical system is controlled by the vehicle at this time; when the power supply of the chassis electrical system is controlled by the vehicle, the chassis power switch S2 is closed, and the chassis power supply signal is input to the control module CM:IN2. After the control module receives the chassis power supply signal, the port CM:OUT1 of the control module stops outputting voltage, and the coil part of the first relay K4 loses power, so that the switch part of the first relay K4 is disconnected. At this time, the power supply of the chassis electrical system is no longer controlled by the vehicle; when the power supply of the chassis electrical system is not controlled by the vehicle, the main power switch S0 is disconnected to cut off the power of the entire vehicle.

[0016] Beneficial effects: Compared with the prior art, the present invention has the following advantages: 1. The present invention can adapt to the whole machine configuration of the extended-range crane through circuit design: the extended-range crane has its own special configuration, and the upper vehicle and the chassis are each equipped with an independent battery box and an independent power switch, which is convenient for the operator to get on and off the vehicle separately. A total power switch of the whole machine is configured on the chassis, which is convenient for the operator to operate safely. The present invention meets the requirements of the extended-range crane to turn on the total power switch of the whole machine through the comprehensive design of the electrical system, and the whole vehicle power supply system is activated; when the upper vehicle is powered on separately, the power supply of the upper vehicle electrical system, the upper vehicle power system and the chassis system is activated, such as the signals of the starter and engine ECU of the upper vehicle power system, and the signals of the outriggers and level gauge of the chassis, so as to provide necessary information for the upper vehicle to perform lifting operations; when the chassis is powered on separately, the chassis electrical system is activated to provide necessary data information for the chassis to travel; after the total power switch of the whole machine is disconnected, the whole machine is powered off. 2. Improved safety: ① If two or more total power switches are set, it is very easy for the operator to forget to turn off the power. By using the method provided in this article, setting a main power switch for the whole machine can effectively avoid the above situation and greatly improve the operational safety. ② The power supply management method 1 provided in this article will result in the situation where the main power switch of the whole machine cannot cut off the power of the whole machine, which poses a great safety hazard. The optimized power supply management method 2 and power supply management method 3 can avoid the above situation and greatly improve the operational safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall configuration of the extended-range crane;

[0018] Figure 2 is a circuit diagram of the electrical power supply system of the extended-range crane described in Example 1;

[0019] Figure 3 is a circuit diagram of the electrical power supply system of the extended-range crane described in Example 2;

[0020] Figure 4 It is a circuit diagram of the electrical power supply system of the extended-range crane described in Example 3. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Example 1

[0023] The electric power supply system of the extended-range crane of the present invention has a circuit as follows Figure 2As shown. The upper vehicle and the chassis are each equipped with a battery and a power switch, and also include a number of relays; the chassis is provided with a main power switch S0, and the chassis battery G2 supplies power to the chassis electrical system through the main power switch S0 and then through the switch part of the first relay K4. The chassis battery G2 supplies power to the coil part of the first relay K4 through the main power switch S0 and then through the chassis power switch S2. The chassis battery G2 supplies power to the coil part of the third relay K0 through the main power switch S0. The chassis battery G2 supplies power to the upper vehicle electrical system through the main power switch S0 and then through the switch part of the first relay K4 and the switch part of the fifth relay K2. The upper vehicle battery G1 supplies power to the upper vehicle electrical system through the switch part of the third relay K0 and then through the switch part of the fourth relay K1. The upper vehicle battery G1 supplies power to the coil part of the fourth relay K1 and the coil part of the fifth relay K2 in parallel through the switch part of the third relay K0 and then through the upper vehicle power switch S1.

[0024] The relay in the present invention is a commonly used relay in engineering machinery, which is divided into two parts: a coil and a switch. When current is input to the coil, magnetism will be generated, which will change the current state of the switch. If the switch is closed at this time, the switch will be disconnected after the coil is energized; if the switch is disconnected at this time, the switch will be closed after the coil is energized.

[0025] The specific scheme of the power supply management method 1 of the extended-range crane electrical system in Example 1 is as follows:

[0026] The upper vehicle and chassis are equipped with separate battery boxes. After the main power switch S0 is activated, the coil of the third relay K0 is energized, and the switch of the third relay K0 is activated to close, so that the upper vehicle power unit is energized. At this time, the chassis power switch S2 is activated separately, the coil of the first relay K4 is energized, and the switch of the first relay K4 is activated to close, and the chassis battery supplies power to the chassis electrical system; at this time, the upper vehicle power switch S1 is activated separately, the coil of the fourth relay K1 is energized, and the switch of the fourth relay K1 is activated to close, and the upper vehicle electrical system is powered. At the same time, the fifth relay K2 is energized, and the upper vehicle power-on signal is transmitted to the chassis, activating the functions required for the upper vehicle operation, and transmitting the signal to the upper vehicle. This power supply management method can meet the power-on requirements of the extended-range crane.

[0027] If the main power switch S0 is activated, the vehicle power switch S1 and the chassis power switch S2 are activated at the same time, then the vehicle and the chassis will have a cross-current problem. When the main power switch S0 is disconnected, the third relay K0 coil is theoretically de-energized, the third relay K0 switch is disconnected, and the vehicle is powered off. However, the actual situation is that when the vehicle power switches are not disconnected, the whole machine power switch S0 is disconnected, the third relay K0 coil is de-energized, but there is a certain delay in the coil de-energization, resulting in the third relay K0 switch being unable to be disconnected in time. Since the vehicle power switch S1 and the chassis power switch S2 are both in the closed state at this time, the vehicle and the chassis form a circuit powered by the vehicle battery box, and the power supply of the vehicle and the chassis cannot be disconnected. Usually, after disconnecting the whole machine main switch, the operator will default to the whole vehicle being powered off. At this time, when the whole machine main switch is disconnected, the whole vehicle is still in the power supply state, which creates a great safety hazard. Therefore, the present invention optimizes and improves the above method, and blocks the vehicle and chassis circuits to achieve the requirement of powering off the whole vehicle when the main power switch S0 is disconnected. The improvement scheme will be described in detail in the following embodiments.

[0028] Example 2

[0029] The first improvement is to add a normally closed switch second relay K3 to achieve circuit blocking between the vehicle and the chassis. Figure 3 The circuit diagram of the improved scheme is shown in FIG. 1. Based on the circuit of Example 1, a switch portion of a second relay K3 is added between the chassis electrical system power supply output terminal and the switch portion of the fifth relay K2, and the switch portion of the second relay K3 is in a normally closed state. The coil portion of the second relay K3 and the coil portion of the first relay K4 are connected in series.

[0030] The specific scheme of the power supply management method 2 for the electrical system of the extended-range crane in Example 2 is as follows:

[0031] After activating the main power switch S0, the coil of the third relay K0 is energized, and the switch of the third relay K0 is activated, so that the vehicle battery can supply power to the vehicle electrical system. At this time, the vehicle power switch S1 is activated, and the coils of the fourth relay K1 and the fifth relay K2 are energized, so that the K1 and K2 switches are closed, and the vehicle electrical system is powered. At the same time, the vehicle circuit powers the chassis electrical system through the normally closed switch of the second relay K3. At this time, the chassis power switch S2 is activated, and the coils of the first and second relays K3 and K4 are energized, so that the K3 and K4 switches are energized. At this time, the second relay K3 changes from the normally closed state to the normally open state. At this time, the chassis and the vehicle circuit are disconnected, and the chassis circuit is powered by the chassis battery. At this time, the main power switch S0 is disconnected, and the whole vehicle is powered off, which meets the demand while avoiding the risk of cross-current between the vehicle and the chassis.

[0032] This embodiment achieves isolation of the upper and lower vehicle power supply systems by adding a relay to drive the on and off of the chassis relay, thereby solving the problem of ensuring that the main power switch is disconnected and the entire vehicle is powered off on an extended-range crane with separate battery boxes for the upper and lower vehicle and only one main switch.

[0033] Example 3

[0034] The second improvement is to add a controller and control the power supply through the controller port. Figure 4 As shown, it is the circuit diagram of the improved scheme. The upper vehicle and the chassis are each equipped with a battery and a power switch, and also include a control module, a plurality of relays and a diode V1; the chassis is provided with a main power switch S0, and the chassis battery G2 supplies power to the chassis electrical system through the main power switch S0 and then through the switch part of the first relay K4. The chassis battery G2 supplies power to the coil part of the third relay K0 through the main power switch S0. The chassis battery G2 inputs the chassis power supply signal to the second input terminal CM:IN2 of the control module through the main power switch S0 and then through the chassis power switch S2. The first output port CM:OUT1 of the control module supplies power to the coil part of the first relay K4. A diode V1 is reversely connected between the chassis power switch S2 and the first output port CM:OUT1 of the control module. The upper vehicle battery G1 supplies power to the upper vehicle electrical system through the switch part of the third relay K0 and then through the switch part of the fourth relay K1. The onboard battery G1 inputs the onboard power supply signal to the first input port CM:IN1 of the control module through the switch part of the third relay K0, the switch part of the fourth relay K1, and then the switch part of the fifth relay K2. The onboard battery G1 supplies power to the onboard electrical system through the switch part of the third relay K0 and then the switch part of the fourth relay K1. The onboard battery G1 supplies power to the coil part of the fourth relay K1 and the coil part of the fifth relay K2 through the switch part of the third relay K0 and then the onboard power switch S1.

[0035] The specific scheme of the power supply management method 3 of the extended-range crane electrical system in Example 3 is as follows:

[0036] After activating the main power switch S0, the coil of the third relay K0 is energized, and the switch of the third relay K0 is activated, so that the vehicle battery can supply power to the vehicle electrical system. At this time, the vehicle power switch S1 is activated, and the coil of the fourth relay K1 is energized. At this time, while supplying power to the vehicle electrical system, the vehicle power supply signal is input to the port CN:IN1 of the control module CM. After the control module receives the input, the port CM:OUT1 outputs a voltage to supply power to the coil of the first relay K4, so that the switch of the first relay K4 is closed, and the chassis power supply is controlled by the vehicle. At this time, when the chassis power switch S2 is closed, the chassis power supply signal is input to the control module CM:IN2. After the control module receives the input signal, the port CM:OUT1 no longer outputs a voltage, and the coil of the first relay K4 loses power, so that the switch of the first relay K4 is disconnected. At this time, the chassis power supply is not controlled by the vehicle. At this time, the main power switch S0 is disconnected, and the whole vehicle is powered off, which meets the demand while avoiding the risk of cross-current between the vehicle and the chassis.

[0037] This embodiment achieves isolation of the upper and lower vehicle power supply systems by adding a controller port and control logic to drive the on and off of the chassis relay, thereby solving the problem of ensuring that the main power switch is disconnected and the entire vehicle is powered off on an extended-range crane that has separate battery boxes for the upper and lower vehicle and only one main switch.

[0038] Example 4

[0039] The control method of the electrical system of the extended-range crane in Example 3 includes: after the control module receives the vehicle power supply signal, the port CM:OUT1 of the control module outputs the voltage; after the control module receives the chassis power supply signal, the port CM:OUT1 of the control module stops outputting the voltage.

[0040] Specifically, after the main power switch S0 is activated, the coil part of the third relay K0 is energized, and the switch part of the activated third relay K0 is closed; after the switch part of the third relay K0 is closed, the on-board power switch S1 is activated, and the coil part of the fourth relay K1 is energized, so that the switch part of the fourth relay K1 is closed, and the on-board battery supplies power to the on-board electrical system, and at the same time, the on-board power supply signal is input to the port CN:IN1 of the control module; after the control module receives the on-board power supply signal, the port CM:OUT1 of the control module outputs a voltage to supply power to the coil part of the first relay K4, so that the switch part of the first relay K4 is closed. The chassis battery supplies power to the chassis electrical system, and the power supply of the chassis electrical system is controlled by the vehicle at this time; when the power supply of the chassis electrical system is controlled by the vehicle, the chassis power switch S2 is closed, and the chassis power supply signal is input to the control module CM:IN2. After the control module receives the chassis power supply signal, the port CM:OUT1 of the control module stops outputting voltage, and the coil part of the first relay K4 loses power, so that the switch part of the first relay K4 is disconnected. At this time, the power supply of the chassis electrical system is no longer controlled by the vehicle; when the power supply of the chassis electrical system is not controlled by the vehicle, the main power switch S0 is disconnected to cut off the power of the entire vehicle.

Claims

1. An electrical power supply system for an extended-range crane, characterized in that: The upper vehicle and the chassis are each equipped with a battery and a power switch, and also include a number of relays; the chassis is provided with a main power switch S0, and the chassis battery G2 supplies power to the chassis electrical system through the main power switch S0 and then through the switch part of the first relay K4; the chassis battery G2 is the coil part of the first relay K4 through the main power switch S0 and then through the chassis power switch S2; The chassis battery G2 supplies power to the coil portion of the third relay K0 through the main power switch S0; The chassis battery G2 supplies power to the on-board electrical system via the main power switch S0 and then via the switch part of the first relay K4 and the switch part of the fifth relay K2; the on-board battery G1 supplies power to the on-board electrical system via the switch part of the third relay K0 and then via the switch part of the fourth relay K1; the on-board battery G1 supplies power to the coil part of the fourth relay K1 and the coil part of the fifth relay K2 in parallel via the switch part of the third relay K0 and then via the on-board power switch S1.

2. The electrical power supply system for the extended-range crane according to claim 1, characterized in that: After the main power switch S0 is activated, the coil part of the third relay K0 is energized, so that the switch part of the third relay K0 is closed; after the switch part of the third relay K0 is closed, the chassis power switch S2 is activated separately, the coil part of the first relay K4 is energized, so that the switch part of the first relay K4 is closed, and the chassis battery supplies power to the chassis electrical system; after the switch part of the third relay K0 is closed, the on-board power switch S1 is activated separately, the coil part of the fourth relay K1 is energized, so that the switch part of the fourth relay K1 is closed, and power is supplied to the on-board electrical system, and at the same time, the coil part of the fifth relay K2 is energized, so that the switch part of the fifth relay K2 is closed, and the on-board power-on signal is transmitted to the chassis, activating the functions required for on-board operation in the chassis electrical system.

3. The electrical power supply system for the extended-range crane according to claim 1, characterized in that: The electrical power supply system of the extended-range crane also includes: a switch part of a second relay K3 is added between the power supply output end of the chassis electrical system and the switch part of the fifth relay K2, and the switch part of the second relay K3 is in a normally closed state; the coil part of the second relay K3 and the coil part of the first relay K4 are connected in series.

4. The electrical power supply system for the extended-range crane according to claim 3 is characterized in that: After the main power switch S0 is activated, the coil part of the third relay K0 is energized, so that the switch part of the third relay K0 is closed; after the switch part of the third relay K0 is closed, the vehicle power switch S1 is activated, the coil parts of the fourth relay K1 and the fifth relay K2 are energized, so that the switch parts of the fourth relay K1 and the fifth relay K2 are closed, the vehicle electrical system is energized, and the chassis electrical system is energized at the same time; after the switch part of the third relay K0 is closed, the chassis power switch S2 is activated, the coil parts of the first relay K4 and the second relay K3 are energized, so that the switch part of the first relay K4 is closed, and the second relay K3 is changed from a normally closed state to a normally open state, so that the chassis and vehicle circuits are disconnected, and the chassis circuit is powered by the chassis battery; After the chassis and vehicle circuits are disconnected, the main power switch S0 is turned off to cut off the power of the entire vehicle.

5. A power supply control method applied to the electric power supply system of the extended-range crane according to claim 1, characterized in that: After the main power switch S0 is activated, the coil part of the third relay K0 is energized, so that the switch part of the third relay K0 is closed; after the switch part of the third relay K0 is closed, the chassis power switch S2 is activated separately, the coil part of the first relay K4 is energized, so that the switch part of the first relay K4 is closed, and the chassis battery supplies power to the chassis electrical system; after the switch part of the third relay K0 is closed, the on-board power switch S1 is activated separately, the coil part of the fourth relay K1 is energized, so that the switch part of the fourth relay K1 is closed, and power is supplied to the on-board electrical system, and at the same time, the coil part of the fifth relay K2 is energized, so that the switch part of the fifth relay K2 is closed, and the on-board power-on signal is transmitted to the chassis, activating the functions required for on-board operation in the chassis electrical system.

6. A power supply control method applied to the electric power supply system of the extended-range crane according to claim 3, characterized in that: After the main power switch S0 is activated, the coil part of the third relay K0 is energized, so that the switch part of the third relay K0 is closed; after the switch part of the third relay K0 is closed, the vehicle power switch S1 is activated, the coil parts of the fourth relay K1 and the fifth relay K2 are energized, so that the switch parts of the fourth relay K1 and the fifth relay K2 are closed, the vehicle electrical system is energized, and the chassis electrical system is energized at the same time; after the switch part of the third relay K0 is closed, the chassis power switch S2 is activated, the coil parts of the first relay K4 and the second relay K3 are energized, so that the switch part of the first relay K4 is closed, and the second relay K3 is changed from a normally closed state to a normally open state, so that the chassis and vehicle circuits are disconnected, and the chassis circuit is powered by the chassis battery; After the chassis and vehicle circuits are disconnected, the main power switch S0 is turned off to cut off the power of the entire vehicle.

7. An electrical power supply system for an extended-range crane, characterized in that: The upper vehicle and the chassis are each equipped with a battery and a power switch, and also include a control module, a number of relays and a diode V1; the chassis is provided with a main power switch S0, and the chassis battery G2 supplies power to the chassis electrical system through the main power switch S0 and then through the switch part of the first relay K4; the chassis battery G2 supplies power to the coil part of the third relay K0 through the main power switch S0; The chassis battery G2 inputs the chassis power supply signal to the second input terminal CM:IN2 of the control module through the main power switch S0 and then through the chassis power switch S2; the first output port CM:OUT1 of the control module supplies power to the coil part of the first relay K4; A diode V1 is reversely connected between the chassis power switch S2 and the first output port CM:OUT1 of the control module; the on-board battery G1 supplies power to the on-board electrical system through the switch part of the third relay K0 and then through the switch part of the fourth relay K1; the on-board battery G1 inputs the on-board power supply signal to the first input port CM:IN1 of the control module through the switch part of the third relay K0, the switch part of the fourth relay K1, and then through the switch part of the fifth relay K2; the on-board battery G1 supplies power to the on-board electrical system through the switch part of the third relay K0 and then through the switch part of the fourth relay K1; the on-board battery G1 supplies power to the coil part of the fourth relay K1 and the coil part of the fifth relay K2 through the switch part of the third relay K0 and then through the on-board power switch S1.

8. The electrical power supply system for the extended-range crane according to claim 7, characterized in that: After the main power switch S0 is activated, the coil part of the third relay K0 is energized, and the switch part of the activated third relay K0 is closed; after the switch part of the third relay K0 is closed, the on-board power switch S1 is activated, and the coil part of the fourth relay K1 is energized, so that the switch part of the fourth relay K1 is closed, and the on-board battery supplies power to the on-board electrical system, and at the same time inputs the on-board power supply signal to the port CN:IN1 of the control module; after the control module receives the on-board power supply signal, the port CM:OUT1 of the control module outputs a voltage to supply power to the coil part of the first relay K4, so that the switch part of the first relay K4 is closed, The chassis battery supplies power to the chassis electrical system, and the power supply of the chassis electrical system is controlled by the vehicle at this time; when the power supply of the chassis electrical system is controlled by the vehicle, the chassis power switch S2 is closed, and the chassis power supply signal is input to the control module CM:IN2. After the control module receives the chassis power supply signal, the port CM:OUT1 of the control module stops outputting voltage, and the coil part of the first relay K4 loses power, so that the switch part of the first relay K4 is disconnected. At this time, the power supply of the chassis electrical system is no longer controlled by the vehicle; when the power supply of the chassis electrical system is not controlled by the vehicle, the main power switch S0 is disconnected, and the whole vehicle is powered off.

9. A power supply control method applied to the electric power supply system of the extended-range crane according to claim 7, characterized in that: After the control module receives the vehicle power supply signal, the port CM:OUT1 of the control module outputs voltage; after the control module receives the chassis power supply signal, the port CM:OUT1 of the control module stops outputting voltage.

10. The power supply control method according to claim 9, characterized in that: After the main power switch S0 is activated, the coil part of the third relay K0 is energized, and the switch part of the activated third relay K0 is closed; after the switch part of the third relay K0 is closed, the on-board power switch S1 is activated, and the coil part of the fourth relay K1 is energized, so that the switch part of the fourth relay K1 is closed, and the on-board battery supplies power to the on-board electrical system, and at the same time inputs the on-board power supply signal to the port CN:IN1 of the control module; after the control module receives the on-board power supply signal, the port CM:OUT1 of the control module outputs a voltage to supply power to the coil part of the first relay K4, so that the switch part of the first relay K4 is closed, The chassis battery supplies power to the chassis electrical system, and the power supply of the chassis electrical system is controlled by the vehicle at this time; when the power supply of the chassis electrical system is controlled by the vehicle, the chassis power switch S2 is closed, and the chassis power supply signal is input to the control module CM:IN2. After the control module receives the chassis power supply signal, the port CM:OUT1 of the control module stops outputting voltage, and the coil part of the first relay K4 loses power, so that the switch part of the first relay K4 is disconnected. At this time, the power supply of the chassis electrical system is no longer controlled by the vehicle; when the power supply of the chassis electrical system is not controlled by the vehicle, the main power switch S0 is disconnected, and the whole vehicle is powered off.

Images