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Electric automobile storage battery charging system and method

An electric vehicle, battery voltage technology, applied in electric vehicles, battery/fuel cell control devices, vehicle energy storage, etc. effect of electricity

Active Publication Date: 2018-05-08
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, increasing the battery capacity will inevitably increase the cost, which is not easy to accept

Method used

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  • Electric automobile storage battery charging system and method
  • Electric automobile storage battery charging system and method

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Embodiment Construction

[0016] like figure 1 As shown, the electric vehicle battery supplementary system includes a vehicle control system (VCU), a battery management system (BMS), a high-voltage battery pack, a DCDC converter, a battery, and a key switch. The VCU monitors the voltage of the battery. When the battery voltage is lower than the preset value, it notifies the BMS to close the high-voltage relay to supply power to the DCDC, and at the same time notifies the DCDC to start working to charge the battery. When the battery voltage reaches the preset voltage value, the VCU notifies the DCDC to stop working, and at the same time notifies the BMS to cut off the high-voltage relay and disconnect the high-voltage battery pack from the DCDC.

[0017] It works as follows: . After the key switch of the whole vehicle is powered off, the VCU runs in a low power consumption mode and wakes up regularly to monitor the battery voltage. When the battery voltage is monitored to be too low at a certain point ...

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Abstract

The invention discloses an electric automobile storage battery charging system. A VCU, a BMS, a high voltage battery pack and a storage battery are arranged on an electric automobile; the VCU communicates with the BMS through a CAN bus; the BMS outputs a control signal to the high voltage battery pack; the VCU receives a voltage signal of the storage battery; the VCU communicates with a DC-DC converter through a CAN bus; and the high voltage battery pack charges the storage battery through the DC-DC converter. The electric automobile storage battery charging system has the advantages that thestructure is simple and reasonable, the operation is stable and reliable and a feed problem of the storage battery caused by long-time parking of the electric automobile can be effectively solved.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a battery intelligent replenishment method and device for an electric vehicle based on low power consumption timing wake-up. Background technique [0002] Due to the increasing scarcity of the world's oil resources and the environmental pollution caused by the emission of automobile exhaust, new energy vehicles have become the focus of research by various automobile manufacturers. Especially with the development of power batteries, electric vehicles have become a relatively common development direction. The pure electric vehicle has the advantages of low operating cost, zero emission, low noise, and can make full use of valley electricity. However, pure electric vehicles mostly adopt single-speed ratio deceleration, and realize the static, low-speed and high-speed driving of the vehicle through the higher speed range of the motor. [0003] More and more electronic devices are u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18
CPCB60L58/10B60L58/12Y02T10/70Y02T10/72
Inventor 桂海勇沙文瀚李学兴闫伟刘琳
Owner CHERY AUTOMOBILE CO LTD
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