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Alternating current charging method and device having voltage drop protection function

A protection function and AC charging technology, applied in battery circuit devices, circuit devices, electric vehicle charging technology, etc., can solve problems that affect customer experience and cannot solve charging interruption problems

Pending Publication Date: 2019-11-19
SICHUAN YEMA AUTOMATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent with the patent number CN 201610162092.2 provides a method of outputting a warning to the customer when the grid fluctuation causes charging abnormality when the electric vehicle is charging, so as to prevent the customer from mistakenly thinking that the vehicle is faulty; although this method provides alarm information for the grid fluctuation, the Unable to solve the problem of charging interruption caused by voltage drop, which seriously affects customer experience

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  • Alternating current charging method and device having voltage drop protection function
  • Alternating current charging method and device having voltage drop protection function
  • Alternating current charging method and device having voltage drop protection function

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Embodiment Construction

[0034] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

[0035] It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

[0036] Please see figure 1 , figure 1 It is a schematic flow chart of the overall flow of the AC charging method provided in the embodiment of the present application.

[0037] The applicant’s research found that there are still many old power grids in many areas, and there are large voltage fluctuations during use. When electric vehicles with AC charging are used in these areas, if there is a voltage drop, it is likely to cause charging interruption. question. Therefore, the embodiment of the present application provides an AC charging method with a voltage drop pro...

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PUM

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Abstract

The application provides an alternating current charging method and an alternating current charging device having a voltage drop protection function. The alternating current charging method having thevoltage drop protection function includes: obtaining voltage of a power network, voltage of a battery busbar, the allowed maximum input current of a recharging gun and request power of a battery charger; calculating input current on an alternating current side of the battery charger according the request power of the battery charger and the voltage of the power network; analyzing if the input current on the alternating current side exceeds the allowed maximum input current of the recharging gun; and if the input current on the alternating current side exceeds the allowed maximum input currentof the recharging gun, adjusting output current on a direct current side of the battery charger according to the voltage of the battery busbar and the allowed maximum input current of the charging gun. The alternating current charging method having the voltage drop protection function achieves the technical effect of normally charging a power battery when the voltage of the power network drops, and prevents charging stop caused to the power battery when the voltage of the power network drops.

Description

technical field [0001] The present application relates to the technical field of electric vehicles, in particular, to an AC charging method and device with voltage drop protection function. Background technique [0002] At present, electric vehicles use power batteries as energy sources, and power battery supplementation is usually divided into two methods: DC charging (fast charging) and AC charging (slow charging). In the AC charging mode, the electric vehicle is connected to the AC power grid through the on-board charger, which is generally fixedly installed on the electric vehicle. However, in many areas, the power grid is old and there are large voltage fluctuations. Therefore, electric vehicles sold in these regions need to be able to charge normally under the condition of grid voltage drop. The patent with the patent number CN 201610162092.2 provides a method of outputting a warning to the customer when the grid fluctuation causes charging abnormality when the elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L53/62H02J7/04
CPCB60L53/62Y02T10/70Y02T10/7072Y02T90/12
Inventor 杨辉常风华王富磊游佳
Owner SICHUAN YEMA AUTOMATION CO LTD