Multi-Battery Power Management Circuit With Time-Shared Energy Transfer
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Solution Overview
Problem
Current electric auxiliary vehicles lack expandable batteries and do not provide expanded energy transmission technology corresponding to them.
Innovation Solution
A power management circuit with a transformer, inductor, primary circuits, motor driving circuit, and charging-and-discharging circuits that transmit electric energy in a time-sharing manner, allowing for expanded battery capacity and multiple power transmission functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple batteries are used to expand energy storage, then battery capacity is improved, but device complexity increases due to multiple charging paths
Solution Approach 1:
The patent combines multiple charging functions into a single integrated power management circuit that can simultaneously manage wireless charging, wired charging, and battery-to-battery charging for multiple batteries. The circuit integrates charging control, power distribution, and battery management functions that were previously separate, thereby expanding battery capacity while avoiding increased device complexity.
Solution Approach 2:
The power management circuit is designed with multi-functionality to handle various charging modes (wireless, wired, battery-to-battery) and support multiple batteries simultaneously. This universal design allows the same circuit architecture to serve multiple purposes, enabling expanded battery capacity without proportionally increasing system complexity.
2Use of energy by moving object
If time-sharing energy transmission is implemented, then energy transmission efficiency is improved, but control complexity increases
Solution Approach 1:
The power management circuit implements time-sharing energy transmission by periodically switching between different charging paths and modes. The circuit uses periodic control signals to allocate power distribution time slots for wireless charging, wired charging, and battery-to-battery charging, thereby improving overall energy transmission efficiency while keeping control complexity manageable through regular switching patterns.
Solution Approach 2:
The system dynamically adjusts energy transmission paths and modes based on real-time battery status and charging requirements. The power management circuit can flexibly switch between static and dynamic control modes, optimizing energy transmission efficiency while adapting control complexity to actual operational needs rather than maintaining fixed high complexity.
3Ease of operation
If wireless power transmission is added, then charging convenience is improved, but energy loss increases
Solution Approach 1:
The power management circuit acts as an intermediary between wireless power reception and battery charging. It receives wireless power through the power receiving port, manages the energy conversion and distribution, and directs power to appropriate batteries. This intermediary role allows the system to utilize wireless charging convenience while minimizing energy loss through efficient power management and path selection.
Solution Approach 2:
The system dynamically changes operating parameters such as charging power levels, voltage, and current based on battery status and transmission conditions. By adjusting these parameters in real-time, the power management circuit optimizes wireless power transmission efficiency, reducing energy loss while maintaining charging convenience. The circuit can switch between wireless and wired charging modes based on parameter comparisons.
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 expanded battery capacity through time-sharing energy transmission, supporting wireless power charging, battery charging from received power, battery energy feedback to power ports, and motor driving using battery energy, enhancing vehicle endurance.
Implementation Method 1
The transformer includes a plurality of primary windings and a secondary winding
Implementation Method 2
The inductor is coupled in parallel with the secondary winding
Data Source
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AI summary
The electric auxiliary vehicle (10, 20) includes batteries (BT1∼BTn), a motor (MT), and power receiving ports (P1∼Pn). The power management circuit (100, 200) includes a transformer (TR), an inductor (LB), primary circuits (110_1∼110_n, 210_1~210_n), a motor driving circuit (120, 220), and charging-and-discharging circuits (130_1∼130_n, 230_1∼230_n). The transformer (TR) includes primary windings (LP1∼LPn) and a secondary winding (LS). The inductor (LB) is coupled in parallel with the secondary winding (LS). Each primary circuit (110_1∼110_n, 210_1~210_n) provides wireless power (VWPT1∼VWPTn) from a power receiving port (P1∼Pn) to a primary winding (LP1∼LPn) at different time periods, and provides electric energy from the primary winding (LP1∼LPn) to the power receiving port (P1∼Pn) at different time periods. Each charging-and-discharging circuit (130_1∼130_n, 230_1∼230_n) provides electric energy from the inductor (LB) to a battery (BT1∼BTn) at different time periods, and provides battery electric energy (PB1∼PBn) from the battery (BT1∼BTn) to the inductor (LB) at different time periods.