Power distribution system for electrically powered construction machines and on-line charging system

Abstract

The application provides a power distribution system and an online charging system for an electric engineering machinery, and relates to the technical field of engineering machinery. The power distribution system comprises a power distribution box, at least one online charging power distribution unit, a power cable and a charging cable; a power supply interface and a charging interface are arranged on the online charging power distribution unit; the power distribution box is electrically connected to the power supply interface through the power cable; the online charging power distribution unit is arranged on an electric engineering machinery; and the charging interface is electrically connected to a charging gun of the electric engineering machinery through the charging cable to perform online charging power distribution for the electric engineering machinery. Through the scheme provided in the application, the online charging power distribution unit can move with the electric engineering machinery, and a fixed charging pile is not needed to be installed, so that the electric engineering machinery can realize work and charging simultaneously.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engineering machinery, in particular to a power distribution system and an online charging system for electric engineering machinery. BACKGROUND

[0002] With the increasing popularity of electrification in engineering machinery, the requirements for convenience, cost and efficiency of engineering machinery are becoming more and more stringent.

[0003] The existing charging method for engineering vehicles is mainly the socket direct connection charging method. This method can only realize the stop charging of engineering vehicles, and cannot meet the situation of working while charging.

[0004] In order to meet the working while charging of engineering vehicles, the length of the charging cable between the engineering vehicle and the power distribution box needs to be long enough. However, due to the high cost of the charging cable compared with the ordinary power cable, it is difficult to meet the engineering requirements. SUMMARY

[0005] The present application aims at the deficiencies in the prior art, and provides a power distribution system and an online charging system for electric engineering machinery, so as to realize the working while charging of electric engineering machinery.

[0006] To achieve the above purpose, the technical solutions adopted by the embodiments of the present application are as follows:

[0007] In a first aspect, the embodiments of the present application provide a power distribution system for electric engineering machinery, which comprises a power distribution box, at least one online charging power distribution unit, a power cable and a charging cable; the online charging power distribution unit is provided with a power supply interface and a charging interface;

[0008] The power distribution box is electrically connected to the power supply interface through the power cable, the online charging power distribution unit is arranged on an electric engineering machinery, and the charging interface is electrically connected to the charging gun of the electric engineering machinery through the charging cable to perform online charging power distribution for the electric engineering machinery.

[0009] Optionally, the power distribution system further comprises at least one wire collecting device, and the power cable electrically connected to the online charging power distribution unit is provided with one wire collecting device.

[0010] Optionally, the online charging power distribution unit comprises a main control module and a switch module; and the charging interface comprises a power interface and a communication interface.

[0011] The communication interface is in communication connection with the main control module; the switch module is electrically connected between the power supply interface and the power interface, and the first output end of the main control module is in control connection with the control end of the switch module.

[0012] Optionally, the online charging and power distribution unit further comprises a power capacity selection button.

[0013] The power capacity selection button is in communication connection with the master control module to send a power capacity selection signal to the master control module, and send the power capacity selection signal to the vehicle-mounted charging machine through the charging gun via the communication interface, so that the vehicle-mounted charging machine changes the charging power according to the power capacity selection signal.

[0014] Optionally, the online charging and power distribution unit further comprises a leakage detection module and a fault indication unit.

[0015] The first input end of the leakage detection module is electrically connected to the power interface, and the output end of the leakage detection module is electrically connected to the first input end of the master control module to send the first leakage current of the power interface to the master control module.

[0016] The second input end of the leakage detection module is electrically connected to the power interface, and the output end of the leakage detection module is electrically connected to the first input end to send the second leakage current of the power interface to the master control module.

[0017] The second output end of the master control module is electrically connected to the fault indication unit to control the fault indication unit to issue a fault indication when the first leakage current or the second leakage current exceeds a leakage current threshold.

[0018] Optionally, the online charging and power distribution unit further comprises a temperature detection module.

[0019] The temperature detection module is electrically connected to the second input end of the master control module to send the temperature of the detection point to the master control module, so that the master control module controls the fault indication unit to issue a fault indication when the temperature exceeds a temperature threshold.

[0020] Optionally, the online charging and power distribution unit further comprises a metering module.

[0021] The input end of the metering module is electrically connected to the power interface to collect the output current and output voltage of the power interface.

[0022] The output end of the metering module is electrically connected to the third input end of the master control module to send the output current and the output voltage to the master control module, so that the master control module calculates the output power according to the output current and the output voltage.

[0023] Optionally, the online charging and power distribution unit further comprises an emergency stop unit.

[0024] The emergency stop unit is electrically connected to a fourth input end of the master control module, and the master control module controls the switch module to be disconnected when detecting that the emergency stop unit is in an open state.

[0025] Optionally, the online charging and power distribution unit further comprises a communication module, which is in communication connection with the master control module to send the received communication signal to the master control module.

[0026] In a second aspect, the embodiments of the present application further provide an online charging system, comprising the power distribution system, at least one charging gun and at least one electric engineering machinery.

[0027] Each online charging and power distribution unit in the power distribution system is arranged on an electric engineering machinery, and each online charging and power distribution unit is connected to a corresponding charging gun seat of the electric engineering machinery through a charging gun.

[0028] The present application has the following beneficial effects:

[0029] The present application provides a power distribution system and an online charging system for electric engineering machinery, wherein the power distribution system comprises a power distribution box, at least one online charging and power distribution unit, a power cable and a charging cable; the online charging and power distribution unit is provided with a power supply interface and a charging interface; the power distribution box is electrically connected to the power supply interface through the power cable, the online charging and power distribution unit is arranged on an electric engineering machinery, and the charging interface is electrically connected to a charging gun of the electric engineering machinery through the charging cable to perform online charging and power distribution for the electric engineering machinery. Through the scheme provided by the present application, the online charging and power distribution unit can be moved with the electric engineering machinery, and there is no need to install fixed charging piles, so that the electric engineering machinery can realize work and charging at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0031] Figure 1 A structural schematic diagram of a power distribution system for electric engineering machinery provided by the embodiments of the present application;

[0032] Figure 2 An internal structural schematic diagram of an online charging and power distribution unit provided by the embodiments of the present application;

[0033] Figure 3 An external structural schematic diagram of an online charging and power distribution unit provided by the embodiments of the present application;

[0034] Figure 4 A structure diagram of a first online charging system provided by an embodiment of the present application is shown in Fig. 1.

[0035] Figure 5 A structure diagram of a power distribution system for an electric engineering machine provided by an embodiment of the present application is shown in Fig. 6. DETAILED DESCRIPTION

[0036] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0037] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art without creative labor based on the embodiments in the present application are within the scope of protection of the present application.

[0038] In the description of the present application, it should be noted that if the terms "upper", "lower", etc. indicate the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the present application is usually placed, only for the convenience of describing the present application and simplifying the description, and it is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0039] In addition, the terms "first", "second", etc. in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0040] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0041] Figure 1 A structure diagram of a power distribution system for an electric engineering machine provided by an embodiment of the present application is shown in Fig. 6. Figure 1As shown, the power distribution system comprises a power distribution box 11, at least one online charging power distribution unit 12, a power cable 13 and a charging cable 14.

[0042] The power supply interface A and the charging interface B are arranged on the online charging power distribution unit 12, the power distribution box 11 is electrically connected to the power supply interface A through the power cable 13, the online charging power distribution unit 12 is arranged on an electric engineering machinery, and the charging interface B is electrically connected to the charging gun of the electric engineering machinery through the charging cable 14 to perform online charging power distribution for the electric engineering machinery.

[0043] Specifically, the power distribution box 11 is a power distribution facility for supplying power to the at least one online charging power distribution unit 12, and can reasonably distribute power distribution capacity to the at least one online charging power distribution unit 12. The input end of the power distribution box 11 is connected to a high-voltage power supply, and each output end of the power distribution box 11 is electrically connected to the power supply interface A of one online charging power distribution unit 12 through a power cable.

[0044] The online charging power distribution unit 12 is used to determine whether the electric engineering machinery needs to be charged during the operation of the electric engineering machinery according to the battery state of the electric engineering machinery, and each electric engineering machinery has an independent online charging power distribution unit 12, so that the online charging power distribution unit 12 moves with the corresponding electric engineering machinery.

[0045] The power supply interface A and the charging interface B of the online charging power distribution unit 12 are electrically connected, the charging interface B of the online charging power distribution unit 12 and the charging gun of the electric engineering machinery are connected through the charging cable, and the charging gun of the electric engineering machinery is connected to the on-board charger of the electric engineering machinery, so that the power battery system is charged through the on-board charger of the electric engineering machinery based on the power supply provided by the power distribution box 11.

[0046] It should be noted that the power cable is a common cable that only provides electrical transmission function, and the charging cable provides signal transmission function in addition to electrical transmission function. The power cable adopts a three-phase four-wire cable, and the corresponding power supply interface is a three-phase four-wire interface. The charging cable is composed of a three-phase four-wire common cable and two cables for signal transmission, and the charging interface also corresponds to a three-phase four-wire electrical interface and two interfaces for receiving signals.

[0047] For example, the power supply interface A and the charging interface B can adopt a fixed connection mode such as a common industrial plug, an industrial plug with high-voltage interlocking function or an OT terminal.

[0048] The power distribution system for the electric engineering machinery provided in the embodiments of the present application comprises: a power distribution box, at least one online charging power distribution unit, a power cable and a charging cable; the power distribution unit is provided with a power supply interface and a charging interface; the power distribution box is electrically connected to the power supply interface through the power cable, the online charging power distribution unit is arranged on an electric engineering machinery, and the charging interface is electrically connected to the charging gun of the electric engineering machinery through the charging cable to perform online charging power distribution for the electric engineering machinery. Through the scheme provided in the embodiments of the present application, the online charging power distribution unit can move with the electric engineering machinery, and there is no need to install a fixed charging pile, so that the electric engineering machinery can realize charging while working.

[0049] On the basis of the above-mentioned embodiments, the embodiments of the present application further provide a power distribution system for electric engineering machinery, as shown in Figure 1 The power distribution system further comprises: at least one wire collecting device 15, and one wire collecting device 15 is arranged on the power cable 13 electrically connected to the online charging power distribution unit 12.

[0050] Specifically, each online charging power distribution unit 12 corresponds to one wire collecting device 15, and the wire collecting device 15 is used for accommodating a certain length of power cable 13. When the electric engineering machinery moves during working, the release length of the power cable 13 can be adjusted according to the moving distance, so that the electric engineering machinery can charge while working. For example, the release length of the power cable 13 can be manually adjusted.

[0051] In an optional embodiment, the wire collecting device 15 further comprises a mechanical structure for wire collecting, and the mechanical structure can automatically adjust the release length of the power cable 13.

[0052] The power distribution system for electric engineering machinery provided in the embodiments of the present application further comprises: at least one wire collecting device, and one wire collecting device is arranged on the power cable electrically connected to the online charging power distribution unit. Through the scheme provided in the embodiments of the present application, the moving range of the electric engineering machinery can be expanded through the power cable reserved in the wire collecting device, and since the price of the power cable is relatively low, the problem of high cost caused by the direct connection of the power distribution box and the electric engineering machinery through the charging cable can be avoided, and the cost of mobile charging is reduced.

[0053] On the basis of the above-mentioned embodiments, the embodiments of the present application further provide a power distribution system for electric engineering machinery, Figure 2 The internal structure of the online charging power distribution unit provided in the embodiments of the present application is shown in Figure 2 The online charging power distribution unit 12 comprises: a main control module 16, a switch module 17; and the charging interface B comprises: a power interface B1 and a communication interface B2.

[0054] The communication interface B2 is in communication connection with the main control module 16; the switch module 17 is electrically connected between the power supply interface A and the power interface B1, and a first output end of the main control module 16 is in control connection with a control end of the switch module 17.

[0055] Specifically, the main control module 16 is composed of a main control chip, a peripheral control circuit, and a communication and display circuit. The main control module 16 is in communication connection with the communication interface B2, and the communication interface B2 is also in communication connection with a communication interface of a charging gun of the electric engineering machinery through a communication cable in the charging cable 14. When a charging instruction or a stop charging instruction is sent by a vehicle-mounted charger of the electric engineering machinery, the charging instruction or the stop charging instruction is sent to the main control module 16 through the communication interface B2.

[0056] The switch module 17 is electrically connected between the power supply interface A and the power interface B1. When the main control module 16 receives the charging instruction, the main control module 16 controls the switch module 17 to be turned on, so that the power distribution box 11 is electrically connected with the charging gun and the power battery system is charged through the vehicle-mounted charger of the electric engineering machinery. When the main control module 16 receives the stop charging instruction, the main control module 16 controls the switch module 17 to be turned off, and the power distribution box 11 stops charging the power battery system through the vehicle-mounted charger of the electric engineering machinery.

[0057] For example, if the power supply interface A and the power interface B1 are both three-phase four-wire interfaces, and the switch module 17 is a power switch, there are four power switches between the power supply interface A and the power interface B1, and each power switch is electrically connected between a group of power supply interface A and power interface B1.

[0058] The power distribution system for the electric engineering machinery provided by the embodiment of the application comprises a main control module and a switch module, the charging interface comprises a power interface and a communication interface, the communication interface is in communication connection with the main control module, and the switch module is electrically connected between the power supply interface and the power interface, and a first output end of the main control module is in control connection with a control end of the switch module. Through the scheme provided by the embodiment of the application, the switch module can be controlled to be turned on when the electric engineering machinery needs to be charged, so that the electric engineering machinery is charged online, and the charging is stopped after the electric engineering machinery is fully charged, thereby realizing the charging while working of the electric engineering machinery.

[0059] On the basis of the above-mentioned embodiment, the embodiment of the application further provides a power distribution system for an electric engineering machinery, Figure 3 An external structure diagram of an online charging power distribution unit provided by the embodiment of the application is shown in FIG. 2. Figure 3 As shown in FIG. 2, the online charging power distribution unit 12 further comprises a power supply capacity selection button 18.

[0060] The power capacity selection button 18 is in communication connection with the master module 16 to send a power capacity selection signal to the master module 16, and send the power capacity selection signal to the on-board charger through the charging gun via the communication interface B2, so that the on-board charger changes the charging power according to the power capacity selection signal.

[0061] Specifically, the on-line charging power distribution unit 12 includes a plurality of modules installed inside and a plurality of modules arranged on the shell, wherein the power capacity selection button 18 is arranged on the shell of the on-line charging power distribution unit 12 and is in communication connection with the master module 16 located inside the on-line charging power distribution unit 12.

[0062] The power capacity selection button 18 is used to adjust the power distribution capacity, i.e. the charging power of the on-board charger of the electric engineering machinery for charging the power battery system. After receiving the power capacity selection signal sent by the power capacity selection button 18, the master module 16 sends the power capacity selection signal to the charging gun via the communication interface B2, and the charging gun sends the power capacity selection signal to the on-board charger. The on-board charger has a control algorithm and an adjusting circuit for adjusting the charging power, so as to adjust the charging power according to the power capacity selection signal.

[0063] The power distribution system for electric engineering machinery provided by the embodiment of the present application further comprises a power capacity selection button, and the power capacity selection button is in communication connection with the master module to send a power capacity selection signal to the master module, and send the power capacity selection signal to the on-board charger through the charging gun via the communication interface, so that the on-board charger adjusts the charging power according to the power capacity selection signal. Through the power capacity selection signal output by the power capacity selection button, the output power of the charging gun can be adjusted, so that the electric engineering machinery can adjust its power system according to the power distribution state of different construction sites, and the safety of power consumption at the construction site is also protected.

[0064] On the basis of the above-mentioned embodiment, the embodiment of the present application further provides a power distribution system for electric engineering machinery, as shown in Figure 2 and Figure 3 The on-line charging power distribution unit 12 further comprises a leakage detection module 19 and a fault indication unit 20.

[0065] The first input end of the leakage detection module 19 is electrically connected to the power interface A, and the output end of the leakage detection module 19 is electrically connected to the first input end of the master module 16 to send the first leakage current of the power interface A to the master module 16.

[0066] The second input end of the leakage detection module 19 is electrically connected to the power interface B1, and the output end of the leakage detection module 19 is electrically connected to the first input end to send the second leakage current of the power interface B1 to the master module 16.

[0067] The second output end of the main control module 16 is electrically connected with the fault indication unit 20, so as to control the fault indication unit 20 to issue a fault indication when the first leakage current or the second leakage current exceeds the leakage current threshold.

[0068] Specifically, the leakage detection module 19 is located inside the online charging and power distribution unit 12, and the fault indication unit 20 is arranged on the shell of the online charging and power distribution unit 12. The leakage detection module 19 is used for detecting the leakage current of the power interface A and the power interface B1. The leakage detection module 19 sends the first leakage current of the power interface A and the second leakage current of the power interface B1 to the main control module 16. The main control module 16 detects whether the first leakage current or the second leakage current exceeds the preset leakage current threshold. When the first leakage current or the second leakage current exceeds the leakage current threshold, the main control module 16 controls the fault indication unit 20 to issue a fault indication. In addition, the main control module 16 also controls the switch module 17 to be disconnected, and the power distribution box 11 stops charging the power battery system through the on-board charger of the electric engineering machinery.

[0069] For example, the fault indication unit 20 can be a fault indication lamp.

[0070] The power distribution system for the electric engineering machinery provided by the embodiment of the present application comprises an online charging and power distribution unit, a leakage detection module and a fault indication unit. The first input end of the leakage detection module is electrically connected with a power interface. The output end of the leakage detection module is electrically connected with the first input end of a main control module, so as to send the first leakage current of the power interface to the main control module. The second input end of the leakage detection module is electrically connected with a power interface. The output end of the leakage detection module is electrically connected with the first input end, so as to send the second leakage current of the power interface to the main control module. The second output end of the main control module is electrically connected with the fault indication unit, so as to control the fault indication unit to issue a fault indication when the first leakage current or the second leakage current exceeds the leakage current threshold. Through the scheme provided by the embodiment of the present application, an alarm can be issued when the leakage currents of the power interface and the power interface exceed the safety threshold, and the charging safety is improved.

[0071] On the basis of the above-mentioned embodiment, the embodiment of the present application further provides a power distribution system for electric engineering machinery, as shown in Figure 2 The online charging and power distribution unit 12 further comprises a temperature detection module 21.

[0072] The temperature detection module 21 is electrically connected with the second input end of the main control module 16, so as to send the temperature of the detection point to the main control module 16, so that the main control module 16 controls the fault indication unit to issue a fault indication when the temperature exceeds the temperature threshold.

[0073] Specifically, the temperature detection module 21 is configured to detect the temperature of the preset detection point inside the online charging power distribution unit 12, and send the detected temperature to the main control module 16. The main control module 16 detects whether the temperature exceeds the temperature threshold. When the temperature exceeds the temperature threshold, the main control module 16 controls the fault indication unit 20 to issue a fault indication.

[0074] For example, the temperature detection module 21 can be a temperature sensor, and the detection point can be the power interface A, the power interface B1, the outer surface of the cable, or the inside of the online charging power distribution unit 12. If the detection point is set at the power interface A or the power interface B1, it can prevent the interface connection from being loose. If the detection point is set on the outer surface of the cable, it can avoid the heat risk caused by the thin cable.

[0075] The power distribution system for the electric engineering machinery provided by the embodiment of the present application further comprises a temperature detection module, and the temperature detection module is electrically connected to the second input end of the main control module to send the temperature of the detection point to the main control module, so that the main control module controls the fault indication unit to issue a fault indication when the temperature exceeds the temperature threshold. Through the scheme provided by the embodiment of the present application, the temperature of the detection point can be detected, the charging failure caused by the excessive temperature of the abnormal heating part can be avoided, and the safety of charging can be ensured.

[0076] On the basis of the above-mentioned embodiment, the embodiment of the present application further provides a power distribution system for the electric engineering machinery, as shown in Figure 2 The online charging power distribution unit 12 further comprises a metering module 22.

[0077] The input end of the metering module 22 is electrically connected to the power interface B1 to collect the output current and the output voltage of the power interface B1.

[0078] The output end of the metering module 22 is electrically connected to the third input end of the main control module 16 to send the output current and the output voltage to the main control module 16, so that the main control module 16 calculates the output power according to the output current and the output voltage.

[0079] Specifically, the metering module 22 is configured to calculate the charging amount of the electric engineering machinery charged by the power distribution box 11. The metering module 22 sends the collected output current and output voltage of the power interface B1 to the main control module 16. The main control module calculates the charging amount of the power battery system charged by the online charging power distribution unit through the vehicle-mounted charger according to the output current, the output voltage, and the charging time length.

[0080] In an optional implementation manner, the metering module 22 can directly adopt an electric meter to measure the charging amount and transmit the charging amount to the main control module 16.

[0081] The power distribution system for the electric engineering machinery provided in the embodiments of the present application, wherein the online charging power distribution unit further comprises: a metering module; an input end of the metering module is electrically connected with the power interface to collect the output current and the output voltage of the power interface; and an output end of the metering module is electrically connected with a third input end of the main control module to send the output current and the output voltage to the main control module, so that the main control module calculates the output power according to the output current and the output voltage. Through the scheme provided in the embodiments of the present application, the charging amount of the electric engineering vehicle can be calculated to master the charging progress of the electric engineering vehicle.

[0082] On the basis of the above-mentioned embodiments, the present application further provides a power distribution system for electric engineering machinery, as shown in Figure 3 The online charging power distribution unit 12 further comprises: an emergency stop unit 23.

[0083] The emergency stop unit 23 is electrically connected with a fourth input end of the main control module 16, and the main control module 16 controls the switch module 17 to be turned off when detecting that the emergency stop unit 23 is in an open state.

[0084] Specifically, the emergency stop unit 23 is arranged on the shell of the online charging power distribution unit 12, so that the emergency stop unit 23 is opened when the power distribution system fails, and the emergency stop unit 23 sends an emergency stop signal to the main control module 16, and the main control module 16 controls the switch module 17 to be turned off according to the emergency stop signal.

[0085] When the fault is eliminated, the emergency stop unit 23 is closed, and an emergency stop cancellation signal is sent to the main control module 16, and the conduction or turn-off of the switch module 17 is controlled by other control signals.

[0086] For example, the emergency stop unit 23 can be an emergency stop switch.

[0087] The power distribution system for the electric engineering machinery provided in the embodiments of the present application, wherein the online charging power distribution unit further comprises: an emergency stop unit; the emergency stop unit is electrically connected with a fourth input end of the main control module, and the main control module controls the switch module to be turned off when detecting that the emergency stop unit is in an open state. Through the scheme provided in the embodiments of the present application, the charging can be stopped in time through the emergency stop switch when the power distribution system fails, so as to ensure the safety of the system and the personnel.

[0088] On the basis of the above-mentioned embodiments, the present application further provides a power distribution system for electric engineering machinery, as shown in Figure 2 The online charging power distribution unit 12 further comprises: a communication module 24; and the communication module 24 is in communication connection with the main control module 16 to send the received communication signal to the main control module 16.

[0089] Specifically, the communication module 24 is configured to receive a communication signal sent by an external communication device, and send the communication signal to the main control module 16, so that the main control module 16 controls corresponding modules according to the received communication signal.

[0090] In an optional embodiment, the communication module 24 is configured to receive a power capacity selection signal sent by an external communication device, and send the power capacity selection signal to the main control module 16, and send the power capacity selection signal to the vehicle-mounted charger through the communication interface B2 via the charging gun, so that the vehicle-mounted charger adjusts the charging power according to the power capacity selection signal.

[0091] For example, the communication module 24 can be a network communication module, such as a 4G communication module or a 5G communication module.

[0092] The power distribution system for the electric engineering machinery provided by the embodiments of the present application further comprises a communication module, and the communication module is in communication connection with the main control module to send the received communication signal to the main control module. Through the scheme provided by the embodiments of the present application, the communication signal can be remotely sent by an external communication device, and the remote control capability of the power distribution equipment is improved.

[0093] On the basis of the above-mentioned embodiments, the embodiments of the present application further provide a power distribution system for electric engineering machinery, such as Figure 3 As shown in the figure, the online charging power distribution unit 12 further comprises a display unit 25, and the display unit 25 is in electrical connection with the main control module 16.

[0094] Specifically, the display unit 25 is arranged on the shell of the online charging power distribution unit 12 to display the information sent by the main control module 16.

[0095] For example, the display unit 25 can be a display screen, and the display unit displays multiple information such as output power, charging capacity, first leakage current, second leakage current, temperature of detection point, fault indication information, etc.

[0096] In an optional embodiment, as shown in the figure, Figure 2 The online charging power distribution unit 12 further has a communication and dry contact interface C, and the communication and dry contact interface C provides a dry contact to the outside. The interface can be expanded to an RS485, CAN, USB and LAN communication interface, and can be wired to an external device or an upper computer.

[0097] In another optional embodiment, as shown in the figure, Figure 3As shown, the auxiliary power supply 26 is also installed inside the online charging power distribution unit 12, and the power supply indicator lamp L1 and the charging indicator lamp L2 are also arranged on the shell of the online charging power distribution unit 20. The auxiliary power supply 26 provides 12V or 24V low-voltage direct current power supply for the main control module 16 through AC / DC conversion. The power supply indicator lamp L1 and the charging indicator lamp L2 are electrically connected with the main control module 16. When the auxiliary power supply 26 normally supplies power for the main control module 16, the main control module 16 controls the power supply indicator lamp L1 to be always on, to indicate that the main control module 16 is normally powered. When the main control module 16 controls the switch module 17 to be turned on, the main control module 16 controls the charging indicator lamp L2 to be always on, to indicate that the power distribution system normally charges the electric engineering system.

[0098] On the basis of any of the above embodiments, the embodiment of the present application further provides an online charging system, Figure 4 The structure schematic diagram of the first online charging system provided by the embodiment of the present application is as shown in Figure 4 As shown, the online charging system comprises the power distribution system 101 of any of the above embodiments, at least one charging gun 102, and at least one electric engineering machine 103.

[0099] Each online charging power distribution unit 12 in the power distribution system 101 is arranged on one electric engineering machine 103, and each online charging power distribution unit 12 is connected with the charging gun seat of the corresponding electric engineering machine 103 through one charging gun 102.

[0100] Specifically, the power distribution box 11 in the power distribution system 101 can be electrically connected with the power supply interface A of at least one online charging power distribution unit 12 through a power cable. The electric engineering machine 103 is provided with a charging gun seat, one end of the charging gun seat is connected with the on-board charger of the electric engineering machine, and the other end of the charging gun seat is a charging gun. The charging gun 102 and the online charging power distribution unit 12 are connected through a charging cable.

[0101] The online charging system provided by the embodiment of the present application comprises a power distribution system, at least one charging gun, and at least one electric engineering machine. Each online charging power distribution unit in the power distribution system is arranged on one electric engineering machine, and each online charging power distribution unit is connected with the charging gun seat of the corresponding electric engineering machine through one charging gun. Through the scheme provided by the embodiment of the present application, the online charging power distribution unit of the power distribution system can move with the electric engineering machine, and there is no need to install fixed charging piles, so that the electric engineering machine can realize work and charging at the same time.

[0102] In an alternative embodiment, the embodiment of the present application further provides an online charging system, Figure 5 The internal structure schematic diagram of the electric engineering machine provided by the embodiment of the present application is as shown in Figure 5As shown, the electric engineering machinery includes a vehicle controller 31, an on-board charger 32, a power distribution unit 33, other high-voltage components 34 and a power battery system 35.

[0103] The vehicle controller 31 (VCU, Vehicle Control Unit) has a vehicle voltage high-voltage detection module, a 12V constant voltage, a wake-up signal for low-voltage communication, a CAN communication signal (including CAN_H and CAN_L) for vehicle communication and an interlock signal (including HVIL+ and HVIL-) on it. The vehicle controller receives the wake-up signal to wake up the on-board charger according to the wake-up signal.

[0104] The on-board charger 32 (OBC, On board charger) sends a charging signal to the communication interface B2 through the charging gun after being woken up, so that the main control module 16 controls the switch module 17 to be turned on according to the charging signal, and charging is realized.

[0105] The power distribution unit 33 (PDU, Power Distribution Unit) distributes power according to the power requirements of the other high-voltage components 34 and the power battery system 35.

[0106] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A power distribution system for an electrically powered working machine, characterized in that, The power distribution system comprises a power distribution box, at least one online charging power distribution unit, a power cable and a charging cable; the online charging power distribution unit is provided with a power supply interface and a charging interface; The power distribution box is electrically connected to the power supply interface through the power cable, the online charging power distribution unit is arranged on an electric engineering machinery, and whether to charge the electric engineering machinery during operation of the electric engineering machinery is determined according to a battery state of the electric engineering machinery; the charging interface is electrically connected to a charging gun of the electric engineering machinery through the charging cable to perform online charging power distribution for the electric engineering machinery; The online charging power distribution unit comprises a main control module and a switch module; the charging interface comprises a communication interface and a power interface; the communication interface is in communication connection with the main control module, the switch module is electrically connected between the power supply interface and the power interface, and a first output end of the main control module is in control connection with a control end of the switch module; The online charging power distribution unit further comprises a power capacity selection button; The power capacity selection button is in communication connection with the main control module, so as to send a power capacity selection signal to the main control module and send the power capacity selection signal to a vehicle-mounted charging machine through the communication interface and the charging gun, so that the vehicle-mounted charging machine changes charging power according to the power capacity selection signal.

2. The power distribution system of claim 1, wherein, The power distribution system further comprises at least one wire collecting device, and one wire collecting device is arranged on the power cable electrically connected to the online charging power distribution unit.

3. The power distribution system of claim 1, wherein, The online charging power distribution unit further comprises an electric leakage detection module and a fault indication unit; A first input end of the electric leakage detection module is electrically connected to the power supply interface, and an output end of the electric leakage detection module is electrically connected to a first input end of the main control module, so as to send a first electric leakage current of the power supply interface to the main control module; A second input end of the electric leakage detection module is electrically connected to the power interface, and the output end of the electric leakage detection module is electrically connected to the first input end, so as to send a second electric leakage current of the power interface to the main control module; A second output end of the main control module is electrically connected to the fault indication unit, so as to control the fault indication unit to issue a fault indication when the first electric leakage current or the second electric leakage current exceeds an electric leakage current threshold.

4. The power distribution system of claim 3, wherein, The online charging power distribution unit further comprises a temperature detection module; The temperature detection module is electrically connected to a second input end of the main control module, so as to send a temperature of a detection point to the main control module, so that the main control module controls the fault indication unit to issue a fault indication when the temperature exceeds a temperature threshold.

5. The power distribution system of claim 1, wherein, The online charging power distribution unit further comprises a metering module; An input end of the metering module is electrically connected to the power interface, so as to collect an output current and an output voltage of the power interface; An output end of the metering module is electrically connected to a third input end of the main control module, so as to send the output current and the output voltage to the main control module, so that the main control module calculates an output power according to the output current and the output voltage.

6. The power distribution system of claim 1, wherein, The online charging power distribution unit further comprises an emergency stop unit; The emergency stop unit is electrically connected to a fourth input end of the master control module, and the master control module controls the switch module to be disconnected when detecting that the emergency stop unit is in an open state.

7. The power distribution system of any one of claims 1-6, wherein, The online charging and power distribution unit further comprises a communication module, which is in communication connection with the master control module to send the received communication signal to the master control module.

8. An online charging system characterized by, The power distribution system according to any one of claims 1-7, the at least one charging gun, and the at least one electrically powered engineering machine; Each online charging and power distribution unit in the power distribution system is arranged on an electrically powered engineering machine, and each online charging and power distribution unit is connected to a charging gun seat of the corresponding electrically powered engineering machine through a charging gun. ​

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