Power management system for engineering machinery vehicle

Abstract

The utility model discloses a power management system for an engineering machinery vehicle, which belongs to the field of power management and can adjust the power of a generator and effectively monitor and diagnose faults of vehicle electric equipment according to different power utilization states of the vehicle. And differentiated power distribution management can be carried out on vehicles in different power utilization states. The system mainly comprises an engine, a generator and a storage battery, the generator is respectively connected with the engine and the storage battery, the system further comprises a bus EDB, the bus EDB is respectively connected with an IECU, a VECU and a KEYPAD, the engine is connected with an EECU, the EECU is connected with the bus EDB, the bus EDB is further connected with the storage battery, and the bus EDB is provided with an output connecting wire. The power supply management device is mainly used for power supply management of engineering machinery vehicles.

Description

Technical Field

[0001] The utility model relates to the field of power management, and in particular to a power management system for engineering machinery vehicles. Background Art

[0002] Existing construction machinery vehicles only have simple switch control for high-power electrical equipment on the vehicle. The vehicle generator is driven by the engine speed to generate electricity. The output current of the generator depends on the engine speed. The engine speed is controlled by the accelerator pedal. When the vehicle is idling or the engine is at low speed, the output current of the generator will be much less than the rated current value of the generator.

[0003] As construction machinery becomes more and more intelligent, the number of electrical equipment in the whole machine is increasing, and the power distribution requirements are becoming more and more complex. However, due to the lack of effective power monitoring, when the engine is working in the idle or low speed section and the generator output current value is lower than the power equipment demand, it is very easy to cause the battery to run out of power. For example, a load fault detection circuit with announcement number CN220137350U determines the load by the current size, but the power management system used in most construction machinery vehicles has a low degree of intelligence and cannot effectively monitor and diagnose faults of electrical equipment. Summary of the invention

[0004] The purpose of the utility model is to provide a power management system for construction machinery vehicles, which can adjust the power of the generator according to the different power usage states of the vehicle and effectively monitor and diagnose faults of the vehicle's electrical equipment; and can realize differentiated power distribution management for vehicles with different power usage states.

[0005] The utility model is realized by the following technical solutions:

[0006] A power management system for engineering machinery vehicles includes an engine, a generator and a battery. The generator is connected to the engine and the battery respectively. The power management system also includes a bus EDB. The bus EDB is connected to an IECU, a VECU and a KEYPAD respectively. The engine is connected to an EECU. The EECU is connected to the bus EDB. The bus EDB is also connected to a battery. The bus EDB is provided with a plurality of output connections. The output connections are connected to electrical equipment.

[0007] Furthermore, the bus EDB includes a chip and a number of relays, the chip is connected to the number of relays respectively, the number of relays are connected to the battery, the chip is connected to VECU, KEYPAD, IECU and EECU respectively, and the relay is connected to the output wiring.

[0008] Furthermore, the bus EDB is connected to VECU, KEYPAD, IECU and EECU respectively through a CAN network.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. The structure is simple and easy to implement in hardware. The power management system is composed of bus EDB, IECU, VECU, EECU, engine and generator. The CAN bus realizes the interaction of vehicle information and intelligent control of electrical equipment and can effectively monitor the status of electrical equipment.

[0011] 2. Through the scientific and logical judgment combination of signals such as the power consumption of the whole machine, engine speed, and the status of electrical equipment, the generator can output on demand under different power consumption conditions of the vehicle, effectively improve the accuracy of fault diagnosis, and realize differentiated power distribution management.

[0012] 3. The existing switch wiring is reduced, the line is more economical, neat and beautiful, and it is conducive to troubleshooting. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a circuit schematic diagram of the utility model.

[0014] In the figure: 1. Bus EDB; 2. VECU; 3. KEYPAD; 4. IECU; 5. EECU; 6. Engine; 7. Generator; 8. Battery; 9. Electrical equipment. DETAILED DESCRIPTION

[0015] The utility model is further described below in conjunction with the accompanying drawings.

[0016] like Figure 1 As shown, embodiment 1, a power management system for engineering machinery vehicles, includes an engine 6, a generator 7 and a battery 8, the generator 7 is connected to the engine 6 and the battery 8 respectively, and is characterized in that: it also includes a bus EDB1, the bus EDB1 is connected to IECU4, VECU2 and KEYPAD3 respectively, the engine 6 is connected to EECU5, EECU5 is connected to the bus EDB1, the bus EDB1 is also connected to the battery 8, and the bus EDB1 is provided with a plurality of output connections, and the output connections are connected to the electrical equipment 9.

[0017] Embodiment 2, a power management system for engineering machinery vehicles, the bus EDB1 includes a chip and a number of relays, the chip is connected to the number of relays respectively, the number of relays are connected to the battery 8, the chip is connected to VECU2, KEYPAD3, IECU4 and EECU5 respectively, the relay is connected to the output wiring; the bus EDB1 is connected to VECU2, KEYPAD3, IECU4 and EECU5 respectively through the CAN network, and the rest is the same as Embodiment 1.

[0018] The driver operates the KEYPAD3, and KEYPAD3 transmits signals to the VECU2 via the CAN network. The VECU2 determines whether the action request signal transmitted by the KEYPAD3 can be executed based on the current state of the vehicle. When the VECU2 determines that the signal transmitted by the current KEYPAD3 is a valid request, the VECU2 transmits the information to the bus EDB1. After receiving the information, the internal chip of the bus EDB1 performs corresponding output to control the internal relay, thereby turning on or off the corresponding electrical equipment 9. The bus EDB1 transmits the power consumption information of the electrical equipment 9 at this time to the IECU4 and VECU2 via the CAN network. The IECU4 displays the corresponding information, and the VECU2 obtains the current vehicle current IA based on the power consumption of the electrical equipment 9; the ECU2 calculates the generator speed based on the engine speed and obtains the generator output current IB according to the generator output characteristic curve:

[0019] 1) If IA < IB, the engine maintains the current speed;

[0020] 2) If IA ≥ IB, the VECU2 obtains the generator speed corresponding to the IA state according to the IA through the generator output characteristic curve, and then obtains the engine speed corresponding to the IA state. The VECU2 transmits the currently required engine speed to the EECU5.

[0021] After receiving the information from the VECU2 to adjust the engine speed, the EECU5 adjusts the engine speed according to the speed value transmitted by the VECU2. The bus EDB1 compares IA with the current total bus EDB1 current output Ic. If the difference between Ic and IA at this time exceeds the normal level, the bus EDB1 starts to perform fault diagnosis on itself and the external electrical equipment 9. The bus EDB1 transmits the information on performing the fault diagnosis to the IECU4 for display to ensure that the driver will not cut off the power of the vehicle after seeing the information. After the bus EDB1 finishes the fault diagnosis, it transmits the fault information to the IECU4 for corresponding display.

Claims

1. A power management system for an engineering vehicle, comprising an engine (6), a generator (7) and a battery (8), wherein the generator (7) is connected to the engine (6) and the battery (8), respectively, and characterized in that: The invention also comprises a bus EDB (1), wherein the bus EDB (1) is connected to the IECU (4), the VECU (2) and the KEYPAD (3) respectively, the engine (6) is connected to the EECU (5), the EECU (5) is connected to the bus EDB (1), and the bus EDB (1) is also connected to a battery (8).

2. The power management system for construction machinery vehicles according to claim 1, characterized in that: The bus EDB (1) comprises a chip and a relay, the chip is connected to the relay, the relay is connected to the battery (8), and the chip is respectively connected to the VECU (2), the KEYPAD (3), the IECU (4) and the EECU (5).

3. The power management system for construction machinery vehicles according to claim 1, characterized in that: The bus EDB (1) is connected to VECU (2), KEYPAD (3), IECU (4) and EECU (5) respectively through a CAN network.

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