Battery Control Method for Voltage Balancing in Parallel Packs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In electronic devices with multiple batteries, voltage differences between batteries can impact the service life, as high-voltage batteries can affect low-voltage batteries when operating in parallel, leading to uneven charging and discharging processes.
Innovation Solution
A battery control method that involves obtaining voltage values from different battery packs and using a control switch to connect them in parallel based on a control strategy, ensuring that the rated capacities of the batteries are managed to prevent voltage imbalances and protect the low-voltage battery pack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple batteries with different capacities operate in parallel, then the power supply capacity is improved, but the voltage imbalance causes harmful impact on battery service life
Solution Approach 1:
The patent implements dynamic switching between series and parallel connections based on real-time voltage detection. The control circuit continuously monitors battery voltages and dynamically adjusts the connection configuration, transitioning from static to dynamic operation to prevent voltage imbalance damage while maintaining high power output capability.
Solution Approach 2:
The control circuit acts as an intermediary between the battery packs and the load. It detects voltage levels and inserts switching elements to mediate the connection state, preventing direct harmful interaction between batteries of different voltages while allowing them to work together in parallel when conditions are favorable.
2Quantity of substance
If batteries are connected in parallel to increase capacity, then the energy storage is improved, but the high-voltage battery negatively impacts the low-voltage battery
Solution Approach 1:
The control circuit performs preliminary detection of battery voltages before establishing parallel connections. By anticipating potential voltage imbalance issues and taking preventive action through selective connection or series configuration, the system avoids the harmful effects of high-voltage batteries impacting low-voltage batteries during parallel operation.
Solution Approach 2:
The patent changes the connection parameter (series vs. parallel) based on voltage parameters. When voltage imbalance is detected, the system switches from parallel connection to series connection or individual operation, thereby changing the operational parameters to eliminate the harmful impact while preserving the ability to store and deliver large amounts of energy.
3Adaptability or versatility
If batteries with different rated capacities are used, then the adaptability is improved, but the voltage difference during operation reduces reliability
Solution Approach 1:
The system dynamically adjusts the connection configuration based on real-time voltage detection, switching between series and parallel connections as needed. This dynamic adaptation allows the system to maintain high reliability by preventing voltage imbalance damage while preserving the adaptability to use batteries with different rated capacities in various configurations.
Data Source
AI summary
A battery control method includes obtaining a first voltage value of a first battery pack of an electronic device; obtaining a second voltage value of a second battery pack of the electronic device, a rated capacity of the first battery pack being different from a rated capacity of the second battery pack; and controlling, based on the first voltage value and the second voltage value, a control switch to be turned on according to a control strategy to connect the second battery pack and the first battery pack in parallel.