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Car charger and control method thereof

An on-board charger and voltage control technology, used in electric vehicle charging technology, charging stations, current collectors, etc., can solve the problems of weak anti-interference ability, uncontrollable voltage, and high common-mode voltage

Active Publication Date: 2019-12-10
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the AC-DC converter cannot control the voltage on the DC side, so that the application range of the voltage on the DC side is narrow, and the electronic devices on the AC side are subjected to high common-mode voltage, resulting in weak anti-interference ability of the system

Method used

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  • Car charger and control method thereof
  • Car charger and control method thereof

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Embodiment Construction

[0046] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0047] Before describing the content of the present disclosure, the application scenario of the present disclosure will be described first.

[0048] figure 1 It is a structural schematic diagram of an on-board charger according to an example shown in the prior art, such as figure 1 As shown, the on-board charger includes a controller, and AC-DC converters respectively connected to the controller, wherein the two ends of the AC-DC converter are respectively connected to the AC source and the on-board battery. When the on-board battery is being charged, the controller controls the AC-DC converter to convert the input alternating current into a constant curren...

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Abstract

The invention relates to a car charger and a control method thereof. The car charger comprises a controller, an alternating-current / direct-current transformer and a two-way direct-current transformer,which are separately connected to the controller, and a car battery which is connected to the two-way direct-current transformer, wherein the controller is used for obtaining first voltage control parameters according to first preset voltage and first feedback voltage output on the alternating-current / direct-current transformer while the alternating-current / direct-current transformer is connectedto an alternating-current source, stabilizing the current output voltage value as first preset voltage by controlling the alternating-current / direct-current transformer according to the first voltagecontrol parameters, and charging the car battery through control over the two-way direct-current transformer; and the controller is further used for obtaining second voltage control parameters according to second preset voltage and second feedback voltage output on the two-way direct-current transformer while the alternating-current / direct-current transformer is connected to the load, and stabilizing current output voltage value as second preset voltage by controlling the two-way direct-current transformer according to the second voltage control parameters, and charging the load by controlling the alternating-current / direct-current transformer.

Description

technical field [0001] The present disclosure relates to the technical field of on-board chargers, in particular, to an on-board charger and a control method thereof. Background technique [0002] The on-board charger is an important part of an electric vehicle, for example, it can be used to charge the on-board battery. In the prior art, when controlling the charging of the on-board battery, the power supply connected to the on-board charger is an alternating current, such as 220V alternating current, and the charging current of the on-board battery is Direct current, the on-board charger has a built-in on-board control circuit. When the on-board battery is being charged, the AC-DC converter in the on-board control circuit is controlled to convert the input AC into constant-current DC for charging the on-board battery. However, the AC-DC converter cannot control the voltage on the DC side, so that the application range of the voltage on the DC side is narrow, and the electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L53/20H02J7/04
CPCY02T10/70Y02T10/7072Y02T10/72Y02T90/14
Inventor 邬白贺王兴辉王超王倩
Owner BYD CO LTD
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