Integrated EV Power Module for Simultaneous Charge and Discharge
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Solution Overview
Problem
Existing electric vehicle charging systems require separate modules for charging and discharging, which increase complexity and component count, and lack the ability to simultaneously charge and discharge without additional circuitry.
Innovation Solution
A power module with a bidirectional AC-DC converter and split phase inverter connected to a common transformer, capable of generating split phase voltages for simultaneous charging and discharging, and integrating adapters for voltage conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate modules are used for charging and discharging, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines separate charging and discharging modules into a single integrated power module that can perform both functions. The power module includes a bidirectional AC-DC converter and DC-AC inverter that can operate in multiple modes (charging mode, discharging mode, and simultaneous charging-discharging mode), eliminating the need for separate modules while maintaining system reliability through unified control architecture.
Solution Approach 2:
The power module is designed as a universal device that can perform multiple functions: charging the battery from AC power source, discharging battery power to external loads, and simultaneously charging while discharging. The bidirectional converter and inverter architecture enables the same hardware to operate in different modes based on control signals, reducing overall system complexity.
2Adaptability or versatility
If additional circuitry is added for simultaneous charging and discharging, then functionality is improved, but device complexity increases
Solution Approach 1:
The patent merges the simultaneous charging and discharging functionality into the existing bidirectional converter and inverter architecture without requiring additional separate circuitry. The controller manages power flow distribution by controlling the switching of the converter and inverter stages, enabling simultaneous operation using the same hardware components that would otherwise be used for separate charging or discharging operations.
Solution Approach 2:
The power module employs dynamic control to switch between different operating modes (charging only, discharging only, simultaneous charging-discharging). The controller adjusts the operation of the bidirectional converter and inverter in real-time based on the desired mode, allowing the system to adapt its functionality without requiring physically different circuit configurations for each mode.
3Reliability
If multiple separate modules are used, then functional reliability is improved, but manufacturing cost increases
Solution Approach 1:
The patent consolidates multiple separate modules (charging module, discharging module, control modules) into a single integrated power module. This reduction in component count directly lowers manufacturing costs while maintaining system reliability through the unified design. The bidirectional converter and inverter share common components and control infrastructure, reducing overall bill of materials and assembly complexity.
Solution Approach 2:
By designing a universal power module that can perform charging, discharging, and simultaneous operations, the patent eliminates the need to manufacture and stock multiple specialized modules. This single-module approach simplifies the supply chain, reduces inventory requirements, and lowers per-unit manufacturing costs while providing the full range of functions that would otherwise require multiple separate devices.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables simultaneous charging and discharging with reduced components, eliminating the need for separate modules and allowing efficient power transfer to both battery systems and external loads.
Implementation Method 1
a charging circuit having a bidirectional alternating current (AC)-direct current (DC) converter
Implementation Method 2
a split phase inverter, the charging circuit and the split phase inverter connected to a common transformer
Implementation Method 3
the charging circuit and the split phase inverter connected to a common transformer
Data Source
AI summary
A system for controlling charging and discharging of a battery assembly of a vehicle includes an outlet and a power module including a charging circuit having a bidirectional alternating current (AC)-direct current (DC) converter and a split phase inverter connected to a common transformer. A controller is configured to control the power module according to at least one of a plurality of operating modes including a charging mode in which AC power charges the battery assembly via the charging circuit. The operating modes include a simultaneous charging and discharging mode in which the power module generates a split phase voltage including a first AC voltage and a second AC voltage, the first AC voltage being out of phase with the second AC voltage, where the first AC voltage is applied to charge the battery assembly and the second AC voltage is provided to an external system via the outlet.