New energy vehicle low-voltage battery power-supplying circuit and a working method thereof

A technology for low-voltage batteries and new energy vehicles, which is applied in the direction of circuits or fluid pipelines, vehicle parts, anti-theft vehicle accessories, etc., can solve the problem of low power of low-voltage batteries, and achieve the effect of avoiding deep discharge

Active Publication Date: 2019-01-04
CHINA AUTOMOTIVE ENG RES INST
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  • Abstract
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Problems solved by technology

Therefore, the low-voltage batteries for pure electr

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  • New energy vehicle low-voltage battery power-supplying circuit and a working method thereof
  • New energy vehicle low-voltage battery power-supplying circuit and a working method thereof
  • New energy vehicle low-voltage battery power-supplying circuit and a working method thereof

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[0034] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present invention, but should not be understood as limiting the present invention.

[0035] The invention discloses a new energy vehicle low-voltage battery supplementary circuit, such as figure 1 As shown, it includes a low-voltage battery, a high-voltage battery, a DC / DC step-down module, a battery current acquisition module, a battery voltage acquisition module, a battery temperature acquisition module, and a vehicle controller. In this embodiment, the low-voltage battery is an on-board battery with an output voltage of 12V, and the high-voltage battery is a 24V or 48V lead-acid battery.

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Abstract

The invention discloses a new energy vehicle low-voltage battery power-supplying circuit and a working method thereof, comprising the following steps: a current collecting terminal of a battery current collecting module is connected with a current collecting terminal of the low-voltage battery; a current output terminal of the battery current collecting module is connected with a current input terminal of a vehicle controller; the current collecting terminal is connected with a current input terminal of the vehicle controller; the voltage acquisition terminal of the battery voltage acquisitionmodule is connected with the voltage acquisition terminal of the low-voltage battery, and the voltage output terminal of the battery voltage acquisition module is connected with the voltage input terminal of the vehicle controller. The temperature acquisition terminal of the battery temperature acquisition module is connected with the temperature acquisition terminal of the low-voltage battery, and the temperature output terminal of the battery temperature acquisition module is connected with the temperature input terminal of the vehicle controller. The invention can avoid the deep dischargeof the low-voltage battery, cause irreversible damage to the battery, is favorable for the whole service life of the battery to be in a shallow charging and shallow discharging state, greatly prolongsthe service time of the battery, and reduces the service cost and maintenance cost of the vehicle owner.

Description

technical field [0001] The invention relates to the technical field of power supplementation for a low-voltage battery of a new energy vehicle, in particular to a power supplement circuit for a low-voltage battery of a new energy vehicle and a control method thereof. Background technique [0002] For new energy vehicles, the low-voltage battery of the whole vehicle is mainly used to supply power to other control modules such as the vehicle anti-theft module and the vehicle remote wake-up control module when the vehicle is parked and locked. Different from the low-voltage battery of traditional fuel vehicles, which outputs a large current when starting, the power requirement of the low-voltage battery of pure electric vehicles is small. Therefore, the low-voltage batteries for pure electric vehicles designed by various OEMs have relatively low power. On the other hand, the low-voltage battery (lead-acid battery) is in a discharge state when the vehicle is parked and locked. ...

Claims

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Application Information

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IPC IPC(8): B60R16/023B60R16/033B60R25/40
CPCB60R16/0231B60R16/033B60R25/403
Inventor 杨勇周舟王洪荣徐磊张衡
Owner CHINA AUTOMOTIVE ENG RES INST
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