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Charging control method and device, and electric vehicle

A charging control method and charging control technology, applied in electric vehicles, electric vehicle charging technology, circuit devices, etc., can solve the problem of inability to charge low-voltage batteries normally, and achieve the effect of ensuring normal charging

Active Publication Date: 2019-01-11
BEIJING ELECTRIC VEHICLE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Embodiments of the present invention provide a charging control method, device, and electric vehicle to solve the problem that the integrated on-board power supply in the prior art cannot continue to charge the low-voltage battery normally after charging the high-voltage battery

Method used

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  • Charging control method and device, and electric vehicle
  • Charging control method and device, and electric vehicle
  • Charging control method and device, and electric vehicle

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Embodiment Construction

[0038] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0039] According to an aspect of the embodiments of the present invention, a charging control method is provided, which is applied to an integrated vehicle power supply.

[0040] Wherein, the integrated vehicle power supply includes: a charging circuit and a charging control module for controlling charging of the charging circuit. The charging control module is electrically connected with the charging circuit.

[0041] Specifically, as figure...

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Abstract

The embodiment of the invention provides a charging control method and device, and an electric vehicle. The charging control method comprises the following steps: a charging control module determinesa first working frequency value according to a difference between a voltage setting value of a high-voltage battery and a voltage feedback value; the charging control module determines a second operating frequency value according to a difference between a voltage setting value of an input voltage of the step-down unit and a voltage feedback value; the charging control module determines the third working frequency value according to the difference between the current setting value and the current feedback value of the high-voltage battery; and the charging control module determines the operating frequency of the components in the DC / DC conversion unit according to the first operating frequency value, the second operating frequency value and the third operating frequency value, and controlsthe components in the DC / DC conversion unit to operate according to the operating frequency. In the charging control method and device, the normal charging of the high-voltage battery can be ensured,and the normal charging of the low-voltage battery can also be ensured.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of automobiles, and in particular, to a charging control method and device, and an electric vehicle. Background technique [0002] At present, the on-board power supply of electric vehicles mainly includes on-board charger power module and on-board DC voltage conversion module. However, as the weight, cost, and space requirements of electric vehicles become more and more stringent, integrated on-board power supplies emerge as the times require. Such as figure 1 As shown, it is the circuit topology diagram of the integrated vehicle power supply. For the integrated vehicle power supply, a transformer (that is, the transformer T1 in the figure) can be used to simultaneously charge the high-voltage battery and the low-voltage battery. When the Yihua vehicle power supply is charging the high-voltage battery and the low-voltage battery, the switch tubes M5-M8 are turned on, and energy i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L53/20H02J7/04
CPCH02J7/045Y02T10/70Y02T10/7072Y02T10/72Y02T90/14
Inventor 孟江涛蒋荣勋苏伟刘立志
Owner BEIJING ELECTRIC VEHICLE
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