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Automobile electrical system pre-charging circuit and pre-charging method

A pre-charging circuit and electrical system technology, applied in electric vehicle charging technology, battery circuit devices, electric vehicles, etc., can solve problems such as high inrush current, adverse effects on the life of grid electrical appliances, etc., to avoid inrush current, eliminate adverse effects, The effect of prolonging the service life of electrical appliances

Active Publication Date: 2016-09-07
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The voltage level of the 48V system is higher than that of the traditional 12V electrical system. When the power supply is closed, it will generate a high inrush current, which will have an adverse effect on the entire power grid and the life of the electrical appliances.

Method used

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  • Automobile electrical system pre-charging circuit and pre-charging method
  • Automobile electrical system pre-charging circuit and pre-charging method

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Embodiment Construction

[0019] In order to further explain the technical solution of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, the pre-charging circuit of the automotive electrical system includes an electronic control unit 1 (Electronic Control Unit), a DC converter 3 , a lithium battery 6 , a boost recuperation system 2 , an electrical system 5 and a battery 6 .

[0021] Inspired integrated motor is electrically connected with the electrical system to form an electrical working circuit. The battery is connected to the electrical working circuit through a DC converter and is electrically connected to the inspired integrated motor and the electrical system. The lithium battery is connected to the electrical working circuit and connected to the inspired integrated motor and electrical system respectively. System electrical connections.

[0022] The electronic control unit communicat...

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Abstract

The invention discloses an automobile electrical system pre-charging circuit and method. An electronic control unit controller controls a direct-current converter to monitor voltage information of a boost recuperation system and an electrical operation loop through a CAN bus, the electronic control unit controller controls voltage information of a lithium battery through the CAN bus and calculates the voltage difference, under the condition of a large voltage difference, the need of pre-charging is judged, an electronic control unit controls the direct-current converter to increase the output voltage of a storage battery to a target value to pre-charge the electrical operation loop, pre-charging is completed, and the electronic control unit controls the lithium battery to close a relay, so that the lithium battery supplies power for the electrical operation loop. After pre-charging, as the voltage of the two terminals of the lithium battery is approximate to the voltage of the two terminals of the electrical operation loop, larger impact current is not generated, the impact current is avoided, the reliability of the circuit is guaranteed, and the service life of electrical appliances is prolonged.

Description

technical field [0001] The invention relates to the technical field of 48V system automobile electrical appliances, in particular to a pre-charging circuit and a pre-charging scheme of an automobile electrical system. Background technique [0002] With the development of electronic and electrical technology and the higher requirements of modern vehicles on fuel consumption, efficiency and environmental protection, the contribution of the basic idle start-stop (star-stop) system based on 12V electrical system to fuel consumption can no longer meet the increasingly stringent fuel consumption standards. The advantages of high efficiency, excellent fuel consumption and energy recovery function of 48V electrical system are becoming more and more prominent. The voltage level of the 48V system is higher than that of the traditional 12V electrical system. When the power supply is closed, it will generate a high inrush current, which will have an adverse effect on the entire power gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L11/18H02J7/00
CPCH02J7/0086B60L58/10Y02T90/16Y02T10/70
Inventor 杨诺吴存学干能强王显钟令
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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