Battery parallel control method for electric vehicle

An electric vehicle and control method technology, applied in electric vehicles, battery/fuel cell control devices, vehicle energy storage, etc., can solve problems such as vehicle stumbling and failure to overlap smoothly, and achieve the effect of avoiding stumbling.

Pending Publication Date: 2021-05-28
KYMCO
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the problem that the batteries of different voltages of the electric vehicle are lapped by hot insertion, the vehicle falters or cannot be smoothly lapped, the invention provides a battery parallel control method of the electric vehicle, so that the batteries can be stably connected in parallel to supply power

Method used

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  • Battery parallel control method for electric vehicle
  • Battery parallel control method for electric vehicle
  • Battery parallel control method for electric vehicle

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Embodiment Construction

[0033] Please refer to figure 1 As shown, the present invention is a battery parallel control method for an electric vehicle, which can be used figure 1 The battery-powered system shown performs. The battery power supply system includes a plurality of battery modules 10 , 20 connected in parallel, and the plurality of battery modules 10 , 20 jointly provide power to a motor 200 of an electric vehicle through a flat power supply cable. The plurality of battery modules 10, 20 are connected and communicated with a vehicle control unit (VCU) 300 in the electric vehicle, and the battery information of the battery modules 10, 20 itself is transmitted to the vehicle control unit 300, or received by the vehicle control unit 300 control. In the following embodiments, a first battery module 10 and a second battery module 20 are used to illustrate the method of the present invention.

[0034] The first battery module 10 includes a first battery (cell) 11, a first charging switch 12, a...

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Abstract

The invention relates to a battery parallel control method for an electric vehicle, the electric vehicle comprises a motor, a first battery module and a second battery module, each battery module is provided with a battery, a charging switch and a discharging switch which are connected in series, and the method comprises the steps that an output voltage value of the first battery module is compared with an output voltage value of the second battery module; when the output voltage value of the first battery module is larger than the output voltage value of the second battery module, a charging switch and a discharging switch of the first battery module are turned on, and a discharging switch of the second battery module is turned on; when it is judged that the discharging current value of the second battery module is larger than a preset current value, the charging switch of the second battery module is turned on, so that the second battery module is stably connected with the first battery module in a lap joint mode to jointly supply power to the motor, and the problem that the electric vehicle runs unsmoothly in the battery lap joint process is solved.

Description

【Technical field】 [0001] The invention relates to a battery control method applied to electric vehicles, in particular to a method for controlling safe parallel power supply of batteries. 【Background technique】 [0002] Electric vehicles provide the power source of the whole vehicle with battery power. According to the design of the vehicle, multiple battery packs connected in parallel can be installed inside the electric vehicle, and the battery pack inside the electric vehicle can be directly charged through a dedicated charging cable, or The user takes it out of the electric vehicle and recharges it. Because the power supply system of an electric vehicle uses a plurality of battery packs connected in parallel to jointly supply power, but because the voltages of different battery packs are not necessarily completely equal, some battery packs may have higher voltages and the remaining battery packs have lower voltages, so It is necessary to provide a safety management mech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/18
CPCB60L58/18Y02T10/70
Inventor 萧逸伟
Owner KYMCO
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