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Under-voltage preventing system and method of new energy vehicle low-voltage storage battery

A low-voltage storage battery and new energy vehicle technology, applied in battery circuit devices, electric vehicle charging technology, electric vehicles, etc.

Inactive Publication Date: 2019-03-08
HOZON NEW ENERGY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly aims at the existing technical problems, and proposes a low-voltage storage battery anti-loss system for new energy vehicles

Method used

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  • Under-voltage preventing system and method of new energy vehicle low-voltage storage battery
  • Under-voltage preventing system and method of new energy vehicle low-voltage storage battery

Examples

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Effect test

Embodiment 1

[0023] A new energy vehicle low-voltage battery anti-loss system, including: battery management system (BMS), vehicle controller (VCU), DC-DC converter (DCDC), low-voltage battery, and power battery. The battery management system and the vehicle controller are connected through a wake-up line. When the new energy vehicle starts to charge, the power battery and battery management system are connected to the external charging facility through the communication line, and the power battery enters the fast charging state, and the battery management system sends a wake-up call Signal to the vehicle controller. The vehicle controller turns on the DC-DC converter according to the received wake-up signal to supply power to the low-voltage battery.

[0024] In the actual operation process, the user can connect the power battery and the battery management system to the external charging facility by inserting the quick-charge gun. As a preference, the power battery and the external charging ...

Embodiment 2

[0032] A new energy vehicle low-voltage battery prevention method includes the following operation steps: Step A: When the power battery is in a fast charging state, a DC-DC converter is turned on to supply power to the low-voltage battery through an external charging facility. Step A includes: Step A-1: ​​When the battery management system detects that the power battery is in a fast charging state, it sends a wake-up signal to the vehicle controller. Step A-2: The vehicle controller receives the wake-up signal and turns on the DC-DC converter.

[0033] In actual operation, the user makes the power battery enter the fast charge state by inserting the quick charge gun. When the battery management system detects that the power battery enters the fast charge state, it sends a wake-up signal through the wake-up line with the vehicle controller To the vehicle controller, the vehicle controller detects whether it receives a wake-up signal. If the vehicle controller does not receive a w...

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Abstract

The invention relates to the field of new energy vehicle charging systems, in particular to an under-voltage preventing system and method of a new energy vehicle low-voltage storage battery. The system comprises a battery management system, a vehicle controller, a DC-DC converter, a low-voltage storage battery and a power battery, and is characterized in that the battery management system starts the DC-DC converter to supply power to the low-voltage storage battery when the power battery is in a quick-charging state. When the new energy vehicle enters the quick-charging state, the low-voltagestorage battery cannot be charged, the under-voltage of the low-voltage storage battery is caused due to the continuous power consumption of the battery management system and other low-voltage loads,and finally the vehicle cannot be normally started. After it is detected that the power battery enters the quick-charging state, the low-voltage storage battery is charged by turning on the DC-DC converter, on one hand, the under-voltage problem of the low-voltage storage battery is solved, and on the other hand, the under-voltage preventing system can adapt to charging piles of different brands since no auxiliary power supply is needed.

Description

Technical field [0001] The invention relates to the field of new energy vehicle charging systems, in particular to a new energy vehicle low-voltage battery anti-loss system and method. Background technique [0002] At present, domestic new energy vehicles mainly contain two types of batteries, namely low-voltage batteries (hereinafter referred to as low-voltage batteries) and power high-voltage batteries (hereinafter referred to as power batteries). The low-voltage batteries are used to power low-voltage components, and the power batteries are mainly used to power high-voltage components. , The current domestic new energy vehicle charging piles are mainly divided into AC charging piles (hereinafter referred to as slow charging piles) and DC charging piles (hereinafter referred to as fast charging piles). When fast charging piles are used for charging, the fast charging piles directly and BMS (power high-voltage battery) Management system) interact until the charging is completed,...

Claims

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Application Information

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IPC IPC(8): B60L53/00B60R16/04H02J7/00
CPCB60R16/04H02J7/00Y02T10/70Y02T10/7072Y02T10/72Y02T10/92Y02T90/14
Inventor 屠德新郭广曾严孙青周全李柳红
Owner HOZON NEW ENERGY AUTOMOBILE CO LTD
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