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Electrical equipment and rapid soft start control method thereof

An electric equipment and electric drive technology, applied in battery/fuel cell control devices, electric vehicles, current collectors, etc., can solve problems such as reducing battery charge and discharge current, poor user experience for vehicle users, and extra waiting time. , to achieve the effect of reducing the discharge current and smoothing the normal working mode

Active Publication Date: 2018-06-22
河南嘉晨智能控制股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, the vehicle is not suitable for normal walking and other work, because if walking will increase the current on the basis of the original high current, which is contrary to the design purpose of the range extender to reduce the charging and discharging current of the battery; If the vehicle does not move, there will be an extra part of the waiting time
[0006] It can be seen that the existing solution is for constant current charging, which is not suitable for the operation of the vehicle at this time, and the user experience is not good for the vehicle user.

Method used

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  • Electrical equipment and rapid soft start control method thereof
  • Electrical equipment and rapid soft start control method thereof
  • Electrical equipment and rapid soft start control method thereof

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Effect test

Embodiment 1

[0047] see Figure 7 , the present invention discloses an electric device, which includes: a battery module 20, a range extender 10, at least one electric drive mechanism 30, and a fast soft start control system.

[0048] The battery module 20 is connected to the range extender 10 and each electric driving mechanism 30 through the first switch 21 . The electric drive mechanism 30 can be various types of motors (such as traction motors), and can also be a hydraulic motor.

[0049] The range extender 10 includes a supercapacitor 11 , a second switch 13 , and an energy converter 12 , and the supercapacitor 11 is connected to the energy converter 12 through the second switch 13 .

[0050] The fast soft start control system includes a first switch control circuit, a second switch control circuit, a supercapacitor discharge control circuit, an electric drive mechanism feedback circuit, a supercapacitor voltage monitoring circuit, and a working mode control module.

[0051] The fir...

Embodiment 2

[0068] The difference between this embodiment and Embodiment 1 is that in this embodiment, the current of the battery is approximately expressed as Ibatreal=Iload-Iuc, so as to achieve the purpose of reducing the battery current, and the reduction effect is determined by the SOC of the current supercapacitor.

[0069] Among them, Ibatreal represents the actual battery current adjusted by the algorithm control, Iload represents the load current, and Iuc represents the current of the supercapacitor. Before the control of the algorithm of the present invention, Ibatreal=Iload, that is, Iuc=0.

Embodiment 3

[0071] In this embodiment, the fast soft start control method of the present invention includes:

[0072] (1) When the system is powered on, K1 and K2 are directly closed; the system can work normally without waiting for the supercapacitor to be precharged.

[0073] (2) Through the controlled discharge current of the supercapacitor, the peak current of the battery can be reduced, and at the same time, the energy of the motor can be used to feed back the supercapacitor for fast charging. Complete the precharging of the supercapacitor as soon as possible.

[0074] (3) When the capacitor reaches the pre-charge voltage, the system can smoothly enter the normal working mode.

[0075] After closing K1 and K2, the motor can work normally. For example, the line ② corresponds to the actual waveform of the motor’s normal working electromagnetic (such as Figure 4 , Figure 5 shown). At this time, it will be found that the battery current has a relatively large peak current. Accord...

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Abstract

The invention discloses electrical equipment and a rapid soft start control method thereof. The electrical equipment comprises a battery module, a range extender, at least one electrical driving mechanism and a rapid soft start control system, wherein the battery module is connected to the range extender and the electrical driving mechanism through a first switch; the range extender comprises a supercapacitor, a second switch and an energy converter, and the supercapacitor is connected to the energy converter through the second switch; and the rapid soft start control system comprises a switchcontrol circuit, a supercapacitor discharge control circuit, an electrical driving mechanism feedback circuit, a supercapacitor voltage monitoring circuit and an operating mode control module. According to the electrical equipment and the rapid soft start control method thereof provided by the invention, the discharge current is increased progressively, the discharge current of the battery is reduced, and simultaneously all motor feedback energy is also recycled, so that the purpose of rapid charging is reached; a normal operating mode can be entered smoothly; and a vehicle user is free of any uncomfortable feeling.

Description

technical field [0001] The invention belongs to the technical field of electric forklifts, and relates to a control system of an electric forklift, in particular to a fast-starting electric device; at the same time, the invention also relates to a fast soft-starting control method of the fast-starting electric device. Background technique [0002] Conventional electric forklifts directly connect the battery pack to the converter. The converter often has a large discharge current and charging current when it is working, which leads to serious vulcanization of the lead-acid battery, which causes the battery pack to heat up and accelerates battery aging. [0003] At present, the electric forklift with a range extender is used in the project. Through the control of the range extender, it can avoid the large current discharge of the lead-acid battery pack, reduce the heating of the battery pack, and increase the working time of the single-charge forklift. It can also extend the li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00B60L11/18
CPCH02J2007/0067H02J7/0068B60L58/12H02J7/345Y02T10/70
Inventor 王志军李飞
Owner 河南嘉晨智能控制股份有限公司
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