Bidirectional Battery-to-AC Power Conversion for Flexible Vehicle Supply
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Solution Overview
Problem
Existing battery power supply methods are inflexible, as they primarily output direct current and cannot easily convert to alternating current, limiting their use in devices without specific connections and complicating the power delivery process.
Innovation Solution
A power device with direct and alternating current terminals that converts battery voltage to alternating current upon signal receipt, allowing direct connection to power interfaces and supporting bidirectional power flow through switches and conversion modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the battery outputs direct current to power electrical devices, then the power supply method is simple, but the flexibility and adaptability are insufficient
Solution Approach 1:
The power device is designed to perform multiple functions: it can convert battery voltage to alternating current for AC loads, provide direct voltage for DC loads, and enable bidirectional power flow for charging and discharging. This multi-functionality allows a single device to replace multiple separate power supply solutions, thereby improving power supply adaptability without proportionally increasing complexity
Solution Approach 2:
The power device incorporates dynamic switching capabilities through controllable switches that can redirect power flow based on real-time operational requirements. The switching mechanism allows the system to adapt between different power supply modes (discharging, charging, AC output, DC output) dynamically, enhancing versatility while maintaining manageable complexity through automated control
2Ease of operation
If the battery connects to power interfaces through specific connection devices, then the power supply is reliable, but the connection process becomes cumbersome and complex
Solution Approach 1:
The power device merges the battery connection interface with the power output interface into a unified system. By integrating the voltage conversion and power distribution functions within the same device structure, it eliminates the need for separate connection devices and intermediate components, thereby simplifying the connection process while maintaining reliable power supply through integrated control
3Adaptability or versatility
If the power device supports bidirectional power flow, then the flexibility is improved, but the device complexity increases
Solution Approach 1:
The bidirectional power flow capability is achieved through dynamic switching mechanisms that can reversibly redirect current paths. The controllable switches enable the system to adapt between charging mode (power entering the battery) and discharging mode (power leaving the battery), providing flexibility while managing complexity through automated switch control based on operational state
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
Enhances flexibility and convenience by enabling direct connection of alternating current loads to power interfaces and facilitating charging and power supply without cumbersome connections, improving safety and compatibility.
Implementation Method 1
the power device can convert the battery voltage of the first battery into the first alternating voltage through inversion upon receiving the power-up signal and output the first alternating voltage to the first power interface
Implementation Method 2
the power device controls the first switch to conduct the second path and the third path
Data Source
AI summary
A power device includes a direct current terminal and a first alternating current terminal; the direct current terminal being connected to a first battery, and the first alternating current terminal being connected to a first power interface. The power device is configured to convert a battery voltage of the first battery into a first alternating voltage upon receiving a first signal, and supply power to the first power interface through a first path between the direct current terminal and the first alternating current terminal.