Efficient EV Charging with Bidirectional Power Modules
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Summary
Problems
Current electric vehicle charging systems face challenges with long charging times, high costs, and limited space due to the use of large batteries and inefficient single-phase charging technologies, which restrict charging power and flexibility.
Innovation solutions
A charging system for electric vehicles that utilizes a bidirectional DC/DC and DC/AC module, along with a controller module, to enable high-power charging from both three-phase and single-phase AC grids, eliminating the need for constant-voltage or constant-current control devices and optimizing space and cost efficiency.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If large-capacity batteries are used to enhance battery life, then battery life is improved, but charging time becomes too long
Why choose this principle:
The patent changes the electrical parameters by using bidirectional DC/DC and DC/AC modules to enable high-power charging from three-phase AC grids, transforming the charging process from low-power single-phase to high-power three-phase operation, thereby reducing charging time while maintaining battery life
Principle concept:
If specialized DC charging stations are used for fast charging, then charging speed is improved, but cost and occupied area increase
Why choose this principle:
The patent makes the in-vehicle charge-discharge device multi-functional by integrating both charging and discharging capabilities, and by enabling compatibility with both single-phase and three-phase AC grids, thereby achieving fast charging without requiring specialized DC charging infrastructure
Application Domain
Data Source
AI summary:
A charging system for electric vehicles that utilizes a bidirectional DC/DC and DC/AC module, along with a controller module, to enable high-power charging from both three-phase and single-phase AC grids, eliminating the need for constant-voltage or constant-current control devices and optimizing space and cost efficiency.
Abstract
A charging system for an electric vehicle and an electric vehicle are provided. The charging system comprises: a power battery; a charge-discharge socket; a bidirectional DC/DC module having a first DC terminal connected with a first terminal of the power battery and a second DC terminal connected with a second terminal of the power battery; a bidirectional DC/AC module having a first DC terminal connected with the second terminal of the power battery and a second DC terminal connected with the first terminal of the power battery; a charge-discharge control module having a first terminal connected with the AC terminal of the bidirectional DC/AC module and a second terminal connected with the charge-discharge socket; and a controller module connected with the charge-discharge control module, and configured to control the charge-discharge control module according to a current operation mode of the charging system.