Pulsed Battery Charger for Multi-Cell Heat Management
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Solution Overview
Problem
Existing battery charging methods are inefficient in charging multiple batteries simultaneously without dividing the charge current, leading to heat generation and reduced charging speed.
Innovation Solution
A battery charger system that divides the charge into a series of pulses and rest periods, with each battery receiving a charging pulse group based on its parameters, allowing for simultaneous charging by adjusting the pulse duration and intensity dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple batteries are charged simultaneously with divided current, then charging capacity is improved, but charging speed deteriorates due to heat generation
Solution Approach 1:
The patent applies periodic pulsed charging where each battery receives charge in discrete pulses separated by rest periods. This allows the battery chemistry to stabilize between pulses, reducing heat generation and polarization effects while maintaining high charging current during active charging phases, thus achieving fast charging of multiple batteries simultaneously
2Productivity
If charging current is increased for faster charging, then charging speed is improved, but heat generation increases causing charge acceptance problems
Solution Approach 1:
By using periodic pulsed charging with high current pulses followed by rest periods, the system achieves fast charging while allowing heat dissipation and chemical stabilization during rest intervals, preventing the continuous heat buildup that would occur with sustained high current charging
Solution Approach 2:
The rest period following each charge pulse serves as a preliminary action that allows the battery to stabilize its chemical state before the next pulse, reducing polarization and improving charge acceptance for subsequent pulses, thereby enabling faster overall charging
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
This method enables faster and more efficient charging of multiple batteries by reducing polarization and heat generation, allowing for simultaneous full charge of multiple batteries with reduced power requirements.
Implementation Method 1
A charging pulse group having a positive pulse for the charging time period and a rest period for the rest time period is generated using the pulse generator. The charging pulse group is sequentially applied to each of the two or more batteries.
Data Source
AI summary
A method and battery charger for charging two or more batteries includes a pulse generator, a detector and a processor communicably coupled to the pulse generator and the detector. A charging series time period, a charging time period and a rest time period are determined based on one or more battery parameters using the processor and the detector. The charging time period is approximately equal to the charging series time period divided by the number of batteries and the rest time period is approximately equal to the charging series time period minus the charging time period. A charging pulse group having a positive pulse for the charging time period and a rest period for the rest time period is generated using the pulse generator, and sequentially applied to each of the batteries. The battery parameters are monitored and the charging pulse group may be adjusted.