Converter devices for connecting electric vehicles to the power grid, battery storage, and other power sources in charging systems.

By introducing rectifiers, DC-DC voltage converters, and current isolation components into the charging system, and combining multiple switch groups, efficient connection between multiple energy sources is achieved, solving the problems of high loss and high cost in existing technologies, and improving charging efficiency and system benefits.

CN112106285BActive Publication Date: 2026-05-26VOLKSWAGEN AG
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Patent Information

Application Number
CN201980031184.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2018-05-09
Filing Date
2019-05-07
Publication Date
2026-05-26
Estimated Expiration
2039-05-07

AI Technical Summary

Technical Problem

Existing charging systems suffer from high losses and high costs when connecting to DC power sources and AC power grids, especially when switching between multiple energy sources, resulting in low efficiency.

Method used

A charging system was designed, comprising a rectifier, a first DC-DC voltage converter, a current isolation element, and multiple switch groups. It achieves efficient connection of various energy sources and sinks through intelligent wiring, reducing hardware usage and optimizing voltage level adjustment.

Benefits of technology

It improves overall efficiency, such as achieving high efficiency of 96% or 98% when charging electric vehicles from solar power, and reduces hardware requirements and system costs.

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Abstract

The present invention relates to a charging system (1) having at least one DC power connector (2, 3) and at least one AC power connector (8) and a battery power connector (6), wherein the battery power connector (6) is capable of being connected to a battery (7), particularly a vehicle high-voltage battery (7), wherein at least one AC power connector (8) is connected to a rectifier (10), wherein a first DC voltage converter (11) is present. Electrical energy or current can be distributed in a highly efficient and optimized manner by means of a first DC voltage converter (11) connected to the DC side of a rectifier (10), wherein the first DC voltage converter (11) is configured as a boost / buck converter, wherein a current isolation element (12) is connected to the first DC voltage converter (11) and a battery power connector (6), wherein at least one DC power connector (2, 3) is connected to the rectifier (10) and the first DC voltage converter (11) via a first switch group (S1a), and is connected to the first DC voltage converter (11) and the current isolation element (12) via a second switch group (S1b).
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