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A system and method for recharging battery of electric vehicle

An electric vehicle, battery voltage technology, applied in electric vehicles, battery/fuel cell control devices, power management and other directions, can solve the problems of increasing batteries and increasing costs, and achieves stable and reliable operation, simple and reasonable structure, and solves the problem of battery feeding. Effect

Active Publication Date: 2020-12-01
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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  • A system and method for recharging battery of electric vehicle
  • A system and method for recharging battery of electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

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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PUM

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Abstract

The invention discloses a power supply system for an electric vehicle battery. The electric vehicle is equipped with a VCU, a BMS, a high-voltage battery pack, and a battery. The VCU communicates with the BMS through a CAN bus, and the BMS outputs control signals to the high-voltage battery pack. The VCU receives the battery voltage signal, the VCU communicates with the DCDC converter through the CAN bus, and the high voltage battery pack charges the battery through the DCDC converter. The invention has simple and reasonable structure, stable and reliable operation, and can effectively solve the problem of battery feeding caused by long-term parking of electric vehicles.

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