E-Bike Multi-Battery Charging Control With Selective Switching
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Solution Overview
Problem
Existing electric bicycles face challenges in efficiently charging multiple batteries to increase driving distance while maintaining battery life and reducing switching power loss.
Innovation Solution
An apparatus and method for controlling the charging of electric bicycles that includes an alternator, inverters, and a controller to selectively charge batteries with the highest efficiency, manage charging amounts, and minimize switching power loss through controlled switch operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If multiple batteries are provided to increase driving distance, then the driving distance is improved, but the charging control complexity increases
Solution Approach 1:
The charging control apparatus dynamically switches between multiple batteries based on real-time charging efficiency comparisons. The controller continuously monitors charging efficiency of each battery and selectively connects the battery with highest efficiency to the charger, enabling adaptive optimization of charging process across multiple battery units.
Solution Approach 2:
The charging system is segmented into multiple independent battery units, each capable of being individually charged or discharged. The controller divides the charging task by selecting specific batteries based on efficiency metrics, allowing independent management of each battery's charging state while achieving overall system optimization.
2Productivity
If frequent switch control is used to optimize charging efficiency, then charging efficiency is improved, but switching power loss increases
Solution Approach 1:
The system performs switching operations only when necessary to achieve significant efficiency improvements. By comparing charging efficiency thresholds and only switching when the efficiency gain justifies the switching cost, the system avoids excessive switching while maintaining optimal charging efficiency.
Solution Approach 2:
The charging control apparatus implements periodic efficiency monitoring and switching decisions rather than continuous switching. The controller periodically evaluates charging efficiency of each battery and performs switching operations at predetermined intervals or when efficiency differences exceed threshold values, reducing unnecessary switching events.
3Duration of action of moving object
If battery capacity is increased to extend driving distance, then driving distance is improved, but battery weight increases
Solution Approach 1:
Instead of using a single large-capacity battery, the system segments the total battery capacity into multiple smaller battery units. These multiple batteries collectively provide the required driving distance while allowing selective charging of only the most efficient batteries at any given time, optimizing the weight-to-capacity ratio.
Solution Approach 2:
The system changes the operational parameters by dynamically selecting which battery to charge based on charging efficiency. This allows the system to utilize the full capacity of multiple batteries over time while maintaining lower instantaneous weight compared to a single large battery configuration.
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
Efficient charging of multiple batteries increases the driving distance of electric bicycles and extends battery life by maintaining optimal charging levels and reducing power loss.
Implementation Method 1
an alternator for generating an AC voltage by driving a pedal
Implementation Method 2
an inverter for converting the AC voltage into a DC voltage
Data Source
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AI summary
The present disclosure provides an apparatus for controlling the charging of an electric bicycle, including an alternator (110) for generating AC voltage by driving a pedal (23), an inverter (120) for converting the AC voltage into DC voltage, a plurality of batteries (130) for charging the DC voltage, a motor (140) which is supplied with electric power from at least one of the plurality of batteries (130) to provide a rotational force to wheels (20, 30), and a controller (150) for selectively charging the plurality of batteries (130) according to the charging efficiency of the plurality of batteries (130).