Low-voltage storage battery charging system and method

A low-voltage battery and charging system technology, applied in electric vehicle charging technology, charging stations, battery/fuel cell control devices, etc., can solve the problems of low success rate, cumbersome high-voltage power-on process, etc., and achieve the effect of saving electric energy

Active Publication Date: 2021-03-23
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing scheme, there are many components involved in high-voltage power-on, and it is necessary to judge that all the participating components of high-voltage power-on are not faulty before high-voltage power-on
Therefore, the process of high-voltage power-on is cumbersome and the success rate is low

Method used

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  • Low-voltage storage battery charging system and method
  • Low-voltage storage battery charging system and method
  • Low-voltage storage battery charging system and method

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Embodiment Construction

[0025] The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments.

[0026] In the description of this application, the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", " The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and thus should not be construed as limiting the application.

[0027] In the description of this application, it should be noted that unless oth...

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Abstract

The invention relates to the technical field of electric vehicles, in particular to a low-voltage storage battery charging system and method. The charging system comprises a low-voltage storage battery which can be used for supplying power to a low-voltage electric appliance of the vehicle; a power battery pack; a direct current converter, which can be used for receiving the voltage provided by the power battery pack when the positive electrode relay and the negative electrode relay of the power battery pack are closed and converting the voltage into the charging voltage of the low-voltage storage battery so as to charge the low-voltage storage battery; and a DCDC controller, which is electrically connected with the low-voltage storage battery and can be used for monitoring the voltage ofthe low-voltage storage battery when the vehicle is in a dormant state; wherein the DCDC controller is in communication connection with a battery management system of the vehicle and is used for awakening the battery management system when the voltage of the low-voltage storage battery is lower than a first threshold value, so that the battery management system closes a positive electrode relay and a negative electrode relay of the power battery pack.

Description

technical field [0001] The present application relates to the technical field of electric vehicles, in particular to a low-voltage storage battery charging system and method. Background technique [0002] The power source of an electric vehicle is generally composed of a high-voltage power battery pack and a low-voltage battery. When the vehicle is turned off, the low-voltage battery is used to supply power to the low-voltage electrical appliances of the vehicle. That is to say, when the vehicle is started, the low-voltage battery must have an appropriate amount of electricity so that the controllers related to the vehicle's start can work normally. If when the vehicle is started, the low-voltage battery has insufficient power to increase the appropriate voltage for the vehicle start-related controller, and the vehicle cannot be started. Therefore, how to replenish or charge the low-voltage battery is an important issue in the development of electric vehicle technology. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L58/12B60L53/00
CPCB60L58/12B60L53/00B60L2240/547Y02T90/16Y02T10/70Y02T10/7072Y02T90/14B60L53/20B60L58/14B60L2210/10
Inventor 宋天助孙坚王辉杨露露
Owner HUAWEI TECH CO LTD
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