Hybrid system for work machine, and work machine

Abstract

The invention discloses a hybrid power system of an operation machine and the operation machine, the hybrid power system can be applied to a new energy hybrid power operation machine, the hybrid power system comprises a power supply device, a running driving device, a first charging device, a second charging device and a power distribution device, and the running driving device is used for being in driving connection with a running system; a charging interface of the first charging device is electrically connected with a charging pile; the second charging device comprises a charging gun and a vehicle-mounted charger. The charging gun is used for being electrically connected with an external power source and the vehicle-mounted charger. The power distribution device comprises a conducting ring and a first power distribution box, the conducting ring is electrically connected with the first power distribution box, the vehicle-mounted charger and the running driving device, and the first power distribution box is electrically connected with the power supply device and the operation system. The power supply device can be electrically connected with the charging pile through the charging interface for charging and can also be electrically connected with the external power supply through the charging gun for charging, the power supply device is convenient to charge, and the power utilization requirement of the operation machine is met.

Description

Technical Field

[0001] The present invention belongs to the technical field of power systems, and in particular relates to a hybrid power system of an operating machine and the operating machine. Background Art

[0002] According to the current development trend of operating machinery, truck cranes using the new energy P2 architecture hybrid system have reached a certain scale because of their characteristics of being able to be driven by pure electricity, pure oil, or oil-electric parallel. Therefore, the optimization and improvement of this technical solution is also suitable for new energy hybrid truck cranes. Truck cranes usually need to travel long distances to reach the work site, and they have to work for a long time after arriving at the work site, which requires a large amount of electricity. The power batteries equipped with hybrid truck cranes usually cannot meet the actual electricity demand, resulting in obvious anxiety about the pure electric drive of hybrid truck cranes. Often, there will be insufficient power as soon as they drive to the work site, and the work site lacks charging facilities and cannot effectively replenish the power, resulting in the truck crane can only use fuel drive to operate and travel, with low operating efficiency and poor environmental protection. Summary of the invention

[0003] In view of the above-mentioned defects or shortcomings, the present invention provides a hybrid power system of a working machine and a working machine, aiming to solve the technical problem that the power battery of a truck crane cannot meet the power demand.

[0004] In order to achieve the above object, the present invention provides a hybrid power system of a working machine, the hybrid power system of the working machine comprising:

[0005] Power supply device;

[0006] A travel drive device, used for driving connection with the travel system of the working machine;

[0007] A first charging device includes a charging interface provided on the working machine, the charging interface is used to be electrically connected to the charging pile and charge the power supply device;

[0008] The second charging device includes a charging gun and an on-board charger, wherein the charging gun is used to be electrically connected to an external power source and the on-board charger respectively;

[0009] The power distribution device includes a conductive ring and a first power distribution box. The conductive ring is electrically connected to the first power distribution box, the vehicle charger and the travel drive device respectively. The first power distribution box is electrically connected to the power supply device and the operating system of the operating machine respectively.

[0010] In an embodiment of the present invention, the power distribution device further comprises a second power distribution box, which is electrically connected to the conductive ring and the electrical equipment for getting off the working machine respectively, and the conductive ring is electrically connected to the travel drive device via the second power distribution box.

[0011] In an embodiment of the present invention, the travel drive device includes an engine and a travel drive motor, the engine is drive-connected to the travel drive motor, the travel drive motor is used to be drive-connected to the travel system, and the conductive ring is electrically connected to the travel drive motor through a second distribution box.

[0012] In an embodiment of the present invention, the power supply device includes a power battery and a high-voltage controller, the power battery is electrically connected to the high-voltage controller, the high-voltage controller is electrically connected to the charging interface and the first distribution box respectively, the hybrid power system also includes a vehicle controller, the vehicle controller is respectively connected to the power battery, the high-voltage controller, the charging interface and the on-board charger, and the vehicle controller is configured as follows:

[0013] When the charging interface is electrically connected to the charging pile, the charging interface charges the power battery through the high-voltage controller;

[0014] When it is determined that the charging gun is electrically connected to the external power supply and the on-board charger respectively, the charging gun charges the power battery through the on-board charger, the conductive ring, the first distribution box and the high-voltage controller in sequence.

[0015] In an embodiment of the present invention, the engine and the driving motor are respectively connected to the vehicle controller for communication, the vehicle controller is also connected to the driving system for communication, and the vehicle controller is further configured as follows:

[0016] When it is determined that the driving system is in a braking condition, a coasting condition or the engine drives the driving motor, the driving motor charges the power battery through the second distribution box, the conductive ring, the first distribution box and the high-voltage controller in sequence.

[0017] In the embodiment of the present invention, the vehicle controller is further configured as follows:

[0018] When an electric energy replenishment instruction is received and it is determined that the driving system is in a parking condition or the driving power of the engine is greater than a preset power, the engine is controlled to drive the driving motor so that the driving motor charges the power battery through the second distribution box, the conductive ring, the first distribution box and the high-voltage controller in sequence.

[0019] In an embodiment of the present invention, the vehicle controller is also respectively connected to the operation execution mechanism of the operation system and the operation drive motor of the operation system, and the vehicle controller is also configured as follows:

[0020] When it is determined that the working execution mechanism is in the energy recovery condition, the working drive motor charges the power battery through the first distribution box and the high-voltage controller in sequence.

[0021] In an embodiment of the present invention, the second charging device further includes a charging base, the charging base is electrically connected to the vehicle-mounted charger, and the charging gun is used to be electrically connected to the vehicle-mounted charger through the charging base;

[0022] And / or, the power supply device also includes a battery controller, which is communicatively connected to the vehicle controller, and the vehicle controller is communicatively connected to the power battery, the high-voltage controller and the charging interface respectively through the battery controller.

[0023] In an embodiment of the present invention, the power distribution device further comprises a voltage converter and a battery. The voltage converter is electrically connected to the second power distribution box and the battery respectively. The battery is used to be electrically connected to low-voltage electrical equipment of the operating machinery.

[0024] In order to achieve the above object, the present invention further provides a working machine, wherein the working machine comprises the hybrid power system of the working machine described above.

[0025] Through the above technical solution, the hybrid power system of the working machine and the working machine provided by the embodiment of the present invention have the following beneficial effects:

[0026] In the technical solution of the present invention, the travel drive device is drive-connected to the travel system and is used to drive the travel system, the power supply device, the first distribution box, the conductive ring and the travel drive device are electrically connected in sequence, so that the power supply device can supply power to the travel drive device, the power supply device, the first distribution box and the operating system are electrically connected in sequence, so that the power supply device can supply power to the operating system, the charging interface is provided on the operating machine and is used to be electrically connected to the charging pile, the charging interface and the power supply device are electrically connected, so that the power supply device can be charged with direct current in a place with a charging pile, and the on-board charger is provided on the operating machine, one end of the charging gun is used to be electrically connected to the on-board charger, and the other end of the charging gun can be electrically connected to an external power supply, and then the external power supply and the on-board charger can be connected through the charging gun in a place with an external power supply, so that the external power supply, the charging gun, the on-board charger, the conductive ring, the first distribution box and the power supply device are electrically connected in sequence to charge the power supply device with alternating current. The power supply device of the hybrid power system can be charged by electrically connecting to a charging pile through a charging interface, and can also be charged by electrically connecting to an external power source through a charging gun. The power supply device is easy to charge, meets the power requirements of the operating machinery's travel system and operating system, effectively alleviating range anxiety, and the power supply device can supply power to the operating system to drive the operating system, thereby improving operating efficiency, reducing energy consumption, and being environmentally friendly.

[0027] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative work. In the accompanying drawings:

[0029] Figure 1 is a schematic structural diagram of a hybrid power system according to an embodiment of the present invention;

[0030] Figure 2 is a schematic diagram of energy flow for direct current charging of a power battery in a hybrid power system according to an embodiment of the present invention;

[0031] Figure 3 is a schematic diagram of energy flow for AC charging of a power battery in a hybrid power system according to an embodiment of the present invention;

[0032] Figure 4 is a schematic diagram of energy flow of a power battery in a first energy recovery mode in a hybrid power system according to an embodiment of the present invention;

[0033] Figure 5 is a schematic diagram of energy flow of a power battery in a second energy recovery mode in a hybrid power system according to an embodiment of the present invention;

[0034] Figure 6 Schematic diagram of energy flow for electric energy replenishment of a power battery in a hybrid power system according to an embodiment of the present invention.

[0035] Description of Reference Numerals

[0036] 10 Power supply device 51 Conductive ring

[0037] 11 Power battery 52 First distribution box

[0038] 12 High voltage controller 53 Second distribution box

[0039] 13 Battery Controller 54 Voltage Converter

[0040] 20 Travel drive 55 Battery

[0041] 21 Engine 60 Vehicle Controller

[0042] 22 Travel drive motor 100 Travel system

[0043] 23 Motor Controller 200 Charging Pile

[0044] 24 Clutch 300 External power supply

[0045] 25 Reducer 400 Operating System

[0046] 30 Charging interface 401 Operation execution mechanism

[0047] 40 Second charging device 402 Operation drive motor

[0048] 41 Charging gun 500 Electric equipment for getting off the vehicle

[0049] 42 On-board charger 600 Low-voltage electrical equipment

[0050] 43 Charging station 700 On-board electrical equipment

[0051] 50 Power distribution device DETAILED DESCRIPTION

[0052] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0053] A hybrid power system for a working machine according to the present invention will be described below with reference to the accompanying drawings.

[0054] like Figure 1 As shown, the present invention provides a hybrid power system for an operating machine, the hybrid power system for the operating machine includes a power supply device 10, a travel drive device 20, a first charging device, a second charging device 40 and a power distribution device 50, the travel drive device 20 is used to drive and connect with the travel system 100 of the operating machine, the first charging device includes a charging interface 30 provided on the operating machine, the charging interface 30 is used to electrically connect with the charging pile 200 and charge the power supply device 10; the second charging device 40 includes a charging gun 41 and an on-board charger 42, the charging gun 41 is used to electrically connect with the external power supply 300 and the on-board charger 42 respectively; the power distribution device 50 includes a conductive ring 51 and a first distribution box 52, the conductive ring 51 is electrically connected with the first distribution box 52, the on-board charger 42 and the travel drive device 20 respectively, and the first distribution box 52 is electrically connected with the high-voltage controller 12 and the operating system 400 of the operating machine respectively.

[0055] It should be noted that the hybrid power system of the present invention can be applied to new energy hybrid power working machinery, and the working machinery can be a new energy hybrid crane, a new energy hybrid excavator, a new energy hybrid loader, etc. In the embodiment of the present invention, only the working machinery is set as a new energy hybrid vehicle crane for example, and the present invention does not limit the type of working machinery. The working machinery includes a travel system 100, an operating system 400, an onboard electrical equipment 700 arranged in the upper operating cab of the working machinery, an offboard electrical equipment 500 arranged in the lower driving cab of the working machinery, and a low-voltage electrical equipment 600, wherein the onboard electrical equipment 700 includes an onboard air conditioning system, a battery cooling system, etc., the offboard electrical equipment 500 includes a steering system, an offboard air conditioning system, a braking system, etc., the low-voltage electrical equipment 600 includes lamps, audio, wipers, etc., and the operating system 400 includes an operating actuator 401 and an operating drive motor 402, and the operating drive motor 402 and the operating actuator 401 drive It is connected to and can drive the working execution mechanism 401 to perform the operation. There are multiple working execution mechanisms 401. The number of working drive motors 402 is consistent with the number of working execution mechanisms 401 and they are driven and connected one by one. The multiple working execution mechanisms 401 are respectively configured as lifting mechanisms, rotating mechanisms and variable-length mechanisms. The multiple working drive motors 402 are respectively configured as winch drive motors, rotating drive motors and variable-length drive motors. In addition, the hybrid power system of the embodiment of the present invention is used to drive the travel system 100, and to supply power to the working system 400, the on-board electrical equipment 700, the off-board electrical equipment 500 and the low-voltage electrical equipment 600.

[0056] Specifically, the travel drive device 20 is driven and connected to the travel system 100 and is used to drive the travel system 100. The power supply device 10, the first distribution box 52, the conductive ring 51 and the travel drive device 20 are electrically connected in sequence, so that the power supply device 10 can supply power to the travel drive device 20. The power supply device 10, the first distribution box 52 and the operating system 400 are electrically connected in sequence, so that the power supply device 10 can supply power to the operating system 400. The charging interface 30 is provided on the operating machine and is used to be electrically connected to the charging connector of the charging pile 200. The charging interface 30 and the power supply device 10 are electrically connected, so that the power supply device 10 can be charged with direct current by inserting the charging connector of the charging pile 200 into the charging interface 30 in a place with a charging pile 200, such as Figure 2As shown; and, the on-board charger 42 is arranged on the working machine, one end of the charging gun 41 is used to be electrically connected to the on-board charger 42, and the other end of the charging gun 41 can be electrically connected to the external power supply 300, and the external power supply 300 can be a power socket arranged at the working site or the parking lot, and then the external power supply 300 and the on-board charger 42 can be connected through the charging gun 41 in the place where there is an external power supply 300, so that the external power supply 300, the charging gun 41, the on-board charger 42, the conductive ring 51, the first distribution box 52 and the power supply device 10 are electrically connected in sequence to charge the power supply device 10 with AC power, as shown Figure 3 shown.

[0057] In the embodiment of the present invention, the power supply device 10 of the hybrid power system can be electrically connected to the charging pile 200 for charging through the charging interface 30, and can also be electrically connected to the external power source 300 for charging through the charging gun 41. The power supply device 10 is easy to charge, and can also be recharged through an external power source 300 such as a power socket at a work site where a charging pile 200 is lacking, thereby meeting the power requirements of the operating machinery travel system 100 and the operating system 400, effectively alleviating the range anxiety, and the power supply device 10 can supply power to the operating system 400 to drive the operating system 400, thereby improving the operating efficiency, reducing energy consumption and being environmentally friendly.

[0058] In the embodiment of the present invention, the power supply device 10 includes a power battery 11 and a high-voltage controller 12, the power battery 11 is electrically connected to the high-voltage controller 12, the high-voltage controller 12 is electrically connected to the charging interface 30 and the first distribution box 52 respectively, the hybrid power system also includes a vehicle controller 60, the vehicle controller 60 is respectively connected to the power battery 11, the high-voltage controller 12, the charging interface 30 and the vehicle charger 42, and the vehicle controller 60 is configured as follows:

[0059] When it is determined that the charging interface 30 is electrically connected to the charging pile 200, the charging interface 30 charges the power battery 11 through the high-voltage controller 12;

[0060] Specifically, Figure 2 As shown, the vehicle controller 60 is communicatively connected with the charging interface 30 and can obtain the current signal and voltage signal of the charging interface 30. The vehicle controller 60 determines that the charging interface 30 is electrically connected to the charging connector of the external charging pile 200 according to the current signal and voltage signal of the charging interface 30. The power battery 11 enters the DC charging mode when the charging interface 30 is electrically connected to the charging pile 200. When it is determined that the power battery 11 is in the DC charging mode, the charging pile 200 sequentially charges the power battery 11 with DC power through the charging interface 30 and the high-voltage controller 12.

[0061] When it is determined that the charging gun 41 is electrically connected to the external power source 300 and the onboard charger 42 respectively, the charging gun 41 charges the power battery 11 through the onboard charger 42, the conductive ring 51, the first power distribution box 52 and the high-voltage controller 12 in sequence;

[0062] Specifically, Figure 3 As shown, the vehicle controller 60 is communicatively connected with the on-board charger 42 and can obtain the current signal and voltage signal of the on-board charger 42. The vehicle controller 60 determines that the on-board charger 42 is electrically connected to the external power supply 300 through the charging gun 41 according to the current signal and voltage signal of the on-board charger 42. When the on-board charger 42 is electrically connected to the external power supply 300 through the charging gun 41, the power battery 11 is in the AC charging mode. When it is determined that the power battery 11 is in the AC charging mode, the external power supply 300 charges the power battery 11 with AC power through the charging gun 41, the on-board charger 42, the conductive ring 51, the first distribution box 52 and the high-voltage controller 12 in sequence.

[0063] The power battery 11 of the hybrid power system has two charging modes: DC charging mode and AC charging mode, so that the power battery 11 can be recharged in a variety of environments such as work sites with power sockets, parking lots, and places with charging piles 200. In addition, the vehicle controller 60 is communicatively connected with the power battery 11, so that the vehicle controller 60 can control the power battery 11 to supply power to the driving device 20 and the operating system 400 respectively, thereby meeting the power demand of the operating machinery and alleviating the anxiety about the cruising range.

[0064] In the embodiment of the present invention, the power distribution device 50 further includes a second power distribution box 53, which is electrically connected to the conductive ring 51 and the electrical equipment 500 of the working machine, respectively, and the conductive ring 51 is electrically connected to the travel drive device 20 through the second power distribution box 53. Figure 1 As shown, the conductive ring 51 is electrically connected to the first distribution box 52, the second distribution box 53 and the on-board charger 42 respectively, the first distribution box 52 is electrically connected to the high-voltage controller 12, the operating system 400 and the on-board electrical equipment 700 of the operating machine respectively, and the second distribution box 53 is electrically connected to the travel drive device 20 and the off-board electrical equipment 500 respectively.

[0065] When it is determined that the power battery 11 is in the AC charging mode, the external power supply 300 transmits the three-phase AC power to the on-board charger 42 through the charging gun 41. The on-board charger 42 is used to convert the three-phase AC power of the external power supply 300 into the DC power required by the power battery 11, and the on-board charger 42 transmits the DC power to the conductive ring 51 through the high-voltage wire and the adapter. The conductive ring 51 is used to connect the first distribution box 52 and the second distribution box 53 so that the current can flow between the power battery 11 and the driving device 20. The conductive ring 51 can transmit the DC power transmitted by the on-board charger 42 to the power battery 11 through the first distribution box 52 and the high-voltage controller 12 in sequence, thereby realizing AC charging of the power battery 11 through the external power supply 300, greatly improving the convenience of charging, and the charging voltage of the charging gun 41 can be set to 380V, which has the advantages of fast charging speed and high charging efficiency.

[0066] In addition, the vehicle controller 60 can control the power battery 11 to supply power to the operating system 400 through the high-voltage controller 12 and the first distribution box 52 in sequence, control the power battery 11 to supply power to the upper vehicle electrical equipment 700 through the high-voltage controller 12 and the first distribution box 52 in sequence, control the power battery 11 to supply power to the travel drive device 20 through the high-voltage controller 12, the first distribution box 52, the conductive ring 51 and the second distribution box 53 in sequence, and control the power battery 11 to supply power to the lower vehicle electrical equipment 500 through the high-voltage controller 12, the first distribution box 52, the conductive ring 51 and the second distribution box 53 in sequence, thereby meeting the power needs of the operating system 400, the upper vehicle electrical equipment 700, the travel system 100 and the lower vehicle electrical equipment 500, and the power supply is stable and reliable.

[0067] In the embodiment of the present invention, the travel drive device 20 includes an engine 21 and a travel drive motor 22, the engine 21 is drivingly connected to the travel drive motor 22, the travel drive motor 22 is used to be drivingly connected to the travel system 100, and the conductive ring 51 is electrically connected to the travel drive motor 22 through the second distribution box 53. Figure 1As shown, the travel drive motor 22 is arranged between the engine 21 and the travel system 100 and is driven and connected to the engine 21 and the travel system 100 respectively. The travel drive motor 22 is electrically connected to the second distribution box 53, so that the power battery 11 can supply power to the travel drive motor 22 through the high-voltage controller 12, the first distribution box 52, the conductive ring 51 and the second distribution box 53 in sequence. When the engine 21 stops running and the power battery 11 supplies power to the travel drive motor 22, the travel drive motor 22 drives the travel system 100 to achieve pure electric drive of the travel system 100; when the engine 21 is started and the power battery 11 does not supply power to the travel drive motor 22, the engine 21 drives the travel drive motor 22 to drive the travel system 100 through the travel drive motor 22 to achieve pure oil drive of the travel system 100; when the engine 21 is started and the power battery 11 supplies power to the travel drive motor 22, the engine 21 and the travel drive motor 22 synchronously drive the travel system 100 to achieve oil-electric hybrid drive of the travel system 100. The hybrid power system has three driving modes: pure electric drive, pure oil drive and oil-electric hybrid drive. It is suitable for new energy operating machinery, meets the use requirements of operating machinery under different working conditions and different scenarios, and is low-carbon and environmentally friendly.

[0068] Furthermore, if Figure 1 As shown, the driving device 20 further includes a clutch 24, a reducer 25 and a motor controller 23, wherein the clutch 24 is arranged between the engine 21 and the driving motor 22, so that the engine 21 can be connected to or disconnected from the driving motor 22 through the clutch 24. In the case of a hybrid system pure electric driving driving system 100, the engine 21 is disconnected from the driving motor 22 through the clutch 24, so that the driving motor 22 can only drive the driving system 100, and the structural design is reasonable; the reducer 25 is arranged between the driving motor 22 and the driving system 100, so that the driving motor 2 2 can be driven and connected to the travel system 100 through the reducer 25 to drive the travel system 100; the motor controller 23 is communicatively connected to the vehicle controller 60, and the motor controller 23 is electrically connected to the second distribution box 53 and the travel drive motor 22 respectively, so that the second distribution box 53 is electrically connected to the travel drive motor 22 through the motor controller 23, and the power battery 11 can supply power to the travel drive motor 22 through the high-voltage controller 12, the first distribution box 52, the conductive ring 51, the second distribution box 53 and the motor controller 23 in sequence, so that the travel drive motor 22 drives the travel system 100 through the reducer 25, and the power supply and power transmission are stable and reliable.

[0069] In the embodiment of the present invention, the engine 21 and the driving motor 22 are respectively connected to the vehicle controller 60 for communication, the vehicle controller 60 is also connected to the driving system 100 for communication, and the vehicle controller 60 is also configured as follows:

[0070] When it is determined that the travel system 100 is in a braking condition, a coasting condition, or the engine 21 drives the travel drive motor 22, the travel drive motor 22 charges the power battery 11 through the second distribution box 53, the conductive ring 51, the first distribution box 52, and the high-voltage controller 12 in sequence;

[0071] Specifically, when the operating machinery is performing driving braking, the driving system 100 is in a braking condition, and when the operating machinery is performing coasting driving, the driving system 100 is in a coasting condition. When the driving system 100 is in a braking condition or a coasting condition, it can drive the driving motor 22 to rotate in the reverse direction, so that the driving motor 22 generates electrical energy; and, when the engine 21 is started, it can also drive the driving motor 22 to rotate. The power battery 11 does not supply power to the driving motor 22, and the engine 21 starts and drives the driving motor 22 to rotate, so that the driving motor 22 generates electrical energy.

[0072] like Figure 4 As shown, the vehicle controller 60 is respectively connected to the driving system 100 and the engine 21 for communication. The vehicle controller 60 can obtain the operating conditions of the driving system 100 and the operating status of the engine 21. When it is determined that the driving system 100 is in a braking condition or a coasting condition, or when it is determined that the engine 21 is started and drives the driving motor 22, the power battery 11 enters the first energy recovery mode. When it is determined that the power battery 11 is in the first energy recovery mode, the electric energy generated by the driving motor 22 is sequentially transmitted to the power battery 11 through the motor controller 23, the second distribution box 53, the conductive ring 51, the first distribution box 52 and the high-voltage controller 12, thereby realizing the charging of the power battery 11 by the driving motor 22, and then realizing the electric energy recovery of the driving motor 22, further saving energy consumption and improving the utilization rate of electric energy.

[0073] Furthermore, the vehicle controller 60 is also respectively connected to the operation execution mechanism 401 of the operation system 400 and the operation drive motor 402 of the operation system 400, and the vehicle controller 60 is also configured as follows:

[0074] When it is determined that the operation execution mechanism 401 is in the energy recovery state, the operation drive motor 402 charges the power battery 11 through the first power distribution box 52 and the high-voltage controller 12 in sequence;

[0075] Specifically, the operation system 400 includes an operation execution mechanism 401 and an operation drive motor 402. The operation execution mechanism 401 is used to perform operations such as lifting, rotation or amplitude variation. The operation drive motor 402 is connected to the operation execution mechanism 401 and is used to drive the operation execution mechanism 401. The operation drive motor 402 is electrically connected to the first distribution box 52; taking the operation execution mechanism 401 being used to perform lifting operations as an example, the operation execution mechanism 401 has gravitational potential energy in the process of lowering heavy objects and is in an energy recovery condition. When the operation execution mechanism 401 is in the energy recovery condition, it can drive the operation drive motor 402 to rotate in the reverse direction, so that the operation drive motor 402 generates electrical energy; those skilled in the art can understand that the operation execution mechanism 401 is in the energy recovery condition, which can also be the case when the operation execution mechanism 401 performs a rotation braking operation, an amplitude variation braking operation, or when the operation execution mechanism 401 performs other operations that can generate energy, which can all cause the operation execution mechanism 401 to be in the energy recovery condition.

[0076] like Figure 5 As shown, the vehicle controller 60 is respectively communicated with the operation execution mechanism 401 and the operation drive motor 402, and the vehicle controller 60 can obtain the operating condition of the operation execution mechanism 401. When it is determined that the operation execution mechanism 401 is in the energy recovery condition, the power battery 11 enters the second energy recovery mode. When it is determined that the power battery 11 is in the second energy recovery mode, the operation execution mechanism 401 drives the operation drive motor 402 to rotate in the reverse direction, so that the gravitational potential energy of the operation execution mechanism 401 is converted into the electrical energy of the operation drive motor 402, and the electrical energy generated by the operation drive motor 402 is transmitted to the power battery 11 through the first distribution box 52 and the high-voltage controller 12 in turn, so that the operation drive motor 402 charges the power battery 11, and then realizes the energy recovery of the operation system 400, further saves energy consumption, and improves the utilization rate of electric energy.

[0077] In the embodiment of the present invention, the vehicle controller 60 is further configured as follows:

[0078] When receiving the electric energy replenishment instruction and determining that the driving system 100 is in the parking state or the driving power of the engine 21 is greater than the preset power, the engine 21 is controlled to drive the driving motor 22, so that the driving motor 22 sequentially charges the power battery 11 through the second distribution box 53, the conductive ring 51, the first distribution box 52 and the high-voltage controller 12;

[0079] Specifically, when the vehicle controller 60 receives the power replenishment instruction, it obtains the operating condition of the driving system 100, controls the engine 21 to drive the driving motor 22 when it is determined that the driving system 100 is in the parking condition, and obtains the driving power of the engine 21 when it is determined that the driving power of the engine 21 is greater than the preset power, determines that the driving power of the engine 21 is surplus and controls the engine 21 to drive the driving motor 22, and the power battery 11 does not supply power to the driving motor 22 when the driving system 100 is in the parking condition and the driving power of the engine 21 is greater than the preset power, so that the engine 21 drives the driving motor 22 to rotate and generate electrical energy, such as Figure 6 As shown, the electric energy generated by the travel drive motor 22 is transmitted to the power battery 11 in sequence through the motor controller 23, the second distribution box 53, the conductive ring 51, the first distribution box 52 and the high-voltage controller 12, so that the travel drive motor 22 charges the power battery 11, and then drives the travel drive motor 22 to generate electricity and replenish electric energy to the power battery 11 through the engine 21, further saving energy consumption and improving the utilization rate of electric energy. In addition, the power battery 11 can be charged in the absence of a charging pile 200 and an external power supply 300 to increase the cruising range of the operating machinery. It can be understood that the electric energy generated by the travel drive motor 22 can also be transmitted to the operating system 400 in sequence through the motor controller 23, the second distribution box 53, the conductive ring 51 and the first distribution box 52 to meet the power demand of the operating system 400.

[0080] In the embodiment of the present invention, the hybrid system can drive the engine 21 through fuel, the engine 21 drives the driving motor 22 to generate electric energy to charge the power battery 11, the charging pile 200 is electrically connected to the charging interface 30 to charge the power battery 11, the charging gun 41 is connected to the external power supply 300 and the on-board charger 42 to charge the power battery 11, and the power battery 11 is in the first energy recovery mode or the second energy recovery mode so that the recovered electric energy charges the power battery 11, so that the power battery 11 can be charged in a variety of scenarios, and the power demand of the long-distance endurance and long-term operation of the operating machinery is met, the energy utilization rate is improved, and the emission is reduced. In addition, the power battery 11 can also supply power to the operating system 400 during the charging process to realize charging and working, which meets the power demand of the operating system 400. In addition, the number of battery packs of the power battery 11 in the hybrid system can be appropriately reduced, which is convenient for the layout of the whole vehicle, and the driving system 100 and the operating system 400 are both driven by the power battery 11, which can not only achieve low-carbon and pollution-free driving and operation, but also greatly reduce the use cost.

[0081] In the embodiment of the present invention, the power distribution device 50 further includes a voltage converter 54 and a battery 55. The voltage converter 54 is electrically connected to the second power distribution box 53 and the battery 55 respectively. The battery 55 is used to be electrically connected to the low-voltage electrical equipment 600 of the operating machine. Figure 1 As shown, the second distribution box 53 is also electrically connected to the battery 55 through the voltage converter 54, so that the power battery 11 can charge the battery 55 in sequence through the high-voltage controller 12, the first distribution box 52, the conductive ring 51, the second distribution box 53 and the voltage converter 54, and the battery 55 is electrically connected to the low-voltage electrical equipment 600 to supply power to the low-voltage electrical equipment 600, thereby meeting the power demand of the low-voltage electrical equipment 600. In addition, the voltage converter 54 can adopt a DC / DC converter in the prior art. The voltage converter 54 can convert the high-voltage direct current output by the second distribution box 53 into the low-voltage direct current required by the low-voltage electrical equipment 600, so as to facilitate the battery 55 to store and supply the low-voltage electrical equipment 600.

[0082] In the embodiment of the present invention, the second charging device 40 further includes a charging seat 43, the charging seat 43 is electrically connected to the vehicle charger 42, and the charging gun 41 is used to be electrically connected to the vehicle charger 42 through the charging seat 43. Figure 1 As shown, one end of the charging gun 41 is used to connect to the external power source 300, and the other end of the charging gun 41 is used to be plugged into the charging seat 43. The charging seat 43 is electrically connected to the on-board charger 42, so that the charging gun 41 can transmit the electric energy of the external power source 300 to the on-board charger 42 through the charging seat 43, thereby realizing AC charging of the power battery 11. The charging seat 43 is convenient to connect with the charging gun 41, which improves the convenience of charging.

[0083] Furthermore, the power supply device 10 further includes a battery controller 13, which is communicatively connected to the vehicle controller 60, and the vehicle controller 60 is communicatively connected to the power battery 11, the high-voltage controller 12 and the charging interface 30 respectively through the battery controller 13. Figure 1 As shown, the battery controller 13 is respectively communicated with the vehicle controller 60, the power battery 11, the high-voltage controller 12 and the charging interface 30, so that the vehicle controller 60 can be respectively communicated with the power battery 11, the high-voltage controller 12 and the charging interface 30 through the battery controller 13, so that the vehicle controller 60 can obtain the data and status of the power battery 11, the high-voltage controller 12 and the charging interface 30.

[0084] In addition, the present invention also provides an operating machine, which includes the hybrid power system according to the above description, and the operating machine also includes a travel system 100, a work system 400, on-board electrical equipment 700, off-board electrical equipment 500 and low-voltage electrical equipment 600. The hybrid power system is used to drive the travel system 100, and to supply power to the travel system 100, the work system 400, the on-board electrical equipment 700, the off-board electrical equipment 500 and the low-voltage electrical equipment 600, respectively. The specific structure of the hybrid power system refers to the above-mentioned embodiment. Since the operating machine adopts all the technical solutions of the above-mentioned embodiments, it at least has all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0085] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0086] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0088] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A hybrid power system for a working machine, characterized in that: The hybrid power system of the working machine comprises: A power supply device (10); A travel drive device (20) for drivingly connecting to a travel system (100) of a working machine; A first charging device, comprising a charging interface (30) provided on the working machine, the charging interface (30) being used to be electrically connected to a charging pile (200) and to charge the power supply device (10); A second charging device (40), comprising a charging gun (41) and an on-board charger (42), wherein the charging gun (41) is used to be electrically connected to an external power source (300) and the on-board charger (42) respectively; The power distribution device (50) comprises a conductive ring (51) and a first power distribution box (52), wherein the conductive ring (51) is electrically connected to the first power distribution box (52), the on-board charger (42) and the travel drive device (20), respectively, and the first power distribution box (52) is electrically connected to the power supply device (10) and the operating system (400) of the operating machine, respectively.

2. The hybrid power system for a working machine according to claim 1, characterized in that: The power distribution device (50) further comprises a second power distribution box (53), wherein the second power distribution box (53) is electrically connected to the conductive ring (51) and the electrical equipment (500) for getting off the working machine, respectively, and the conductive ring (51) is electrically connected to the travel drive device (20) via the second power distribution box (53).

3. The hybrid power system for a working machine according to claim 2, characterized in that: The travel drive device (20) comprises an engine (21) and a travel drive motor (22), the engine (21) being drive-connected to the travel drive motor (22), the travel drive motor (22) being drive-connected to the travel system (100), and the conductive ring (51) being electrically connected to the travel drive motor (22) via the second distribution box (53).

4. The hybrid power system for a working machine according to claim 3, characterized in that: The power supply device (10) comprises a power battery (11) and a high-voltage controller (12), wherein the power battery (11) is electrically connected to the high-voltage controller (12), and the high-voltage controller (12) is electrically connected to the charging interface (30) and the first distribution box (52) respectively. The hybrid power system further comprises a vehicle controller (60), wherein the vehicle controller (60) is communicatively connected to the power battery (11), the high-voltage controller (12), the charging interface (30) and the on-board charger (42) respectively, and the vehicle controller (60) is configured as follows: When it is determined that the charging interface (30) is electrically connected to the charging pile (200), the charging interface (30) charges the power battery (11) through the high-voltage controller (12); When it is determined that the charging gun (41) is electrically connected to the external power source (300) and the on-board charger (42) respectively, the charging gun (41) charges the power battery (11) in sequence through the on-board charger (42), the conductive ring (51), the first distribution box (52) and the high-voltage controller (12).

5. The hybrid power system for a working machine according to claim 4, characterized in that: The engine (21) and the driving motor (22) are respectively connected to the vehicle controller (60) for communication, the vehicle controller (60) is also connected to the driving system (100) for communication, and the vehicle controller (60) is also configured as follows: When it is determined that the travel system (100) is in a braking condition, a coasting condition, or the engine (21) is driving the travel drive motor (22), the travel drive motor (22) charges the power battery (11) in sequence through the second distribution box (53), the conductive ring (51), the first distribution box (52), and the high-voltage controller (12).

6. The hybrid power system for a working machine according to claim 5, characterized in that: The vehicle controller (60) is also configured as follows: When an electric energy replenishment instruction is received and it is determined that the driving system (100) is in a parking state or the driving power of the engine (21) is greater than a preset power, the engine (21) is controlled to drive the driving motor (22), so that the driving motor (22) charges the power battery (11) in sequence through the second distribution box (53), the conductive ring (51), the first distribution box (52) and the high-voltage controller (12).

7. The hybrid power system for a working machine according to claim 4, characterized in that: The vehicle controller (60) is also respectively connected to the operation execution mechanism (401) of the operation system (400) and the operation drive motor (402) of the operation system (400), and the vehicle controller (60) is also configured as follows: When it is determined that the operation execution mechanism (401) is in an energy recovery state, the operation drive motor (402) charges the power battery (11) in sequence through the first distribution box (52) and the high-voltage controller (12).

8. The hybrid power system for a working machine according to claim 4, characterized in that: The second charging device (40) further comprises a charging seat (43), the charging seat (43) being electrically connected to the on-board charger (42), and the charging gun (41) being used to be electrically connected to the on-board charger (42) via the charging seat (43); And / or, the power supply device (10) further comprises a battery controller (13), the battery controller (13) is communicatively connected to the vehicle controller (60), and the vehicle controller (60) is communicatively connected to the power battery (11), the high-voltage controller (12) and the charging interface (30) respectively through the battery controller (13).

9. The hybrid power system for a working machine according to any one of claims 2 to 8, characterized in that: The power distribution device (50) further comprises a voltage converter (54) and a battery (55), wherein the voltage converter (54) is electrically connected to the second power distribution box (53) and the battery (55) respectively, and the battery (55) is used to be electrically connected to the low-voltage electrical equipment (600) of the operating machine.

10. A working machine, characterized in that: The working machine includes a hybrid power system for a working machine according to any one of claims 1 to 9.

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