Reserve Battery Charging Control for Lifespan Extension
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Solution Overview
Problem
Current methods for managing multiple batteries in portable electrical devices often result in suboptimal reserve battery storage, leading to premature aging or discontinuous device usage due to inefficient charging strategies.
Innovation Solution
A method that maintains reserve batteries at a predetermined intermediate state of charge between 50% and 80%, using a control circuit to determine the state of the battery in use and trigger charging only when necessary to avoid self-discharge and calendar aging, ensuring continuous device operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the reserve battery is charged to 100% in advance, then the device can be used continuously without interruption, but the reserve battery ages prematurely due to prolonged maximum charge state
Solution Approach 1:
The patent changes the state of charge parameter of the reserve battery from 100% to an intermediate value (50-80%). This parameter change reduces calendar aging and self-discharge while the control system monitors battery in use state to trigger charging only when needed, thus extending reserve battery lifespan while maintaining continuous device operation capability
2Reliability
If the reserve battery is charged only when the battery in use is almost discharged, then the battery lifespan is extended, but the device cannot be used continuously
Solution Approach 1:
The patent implements a control circuit that continuously monitors the state of charge of the battery in use and provides feedback. When the battery in use reaches a predetermined threshold, the control circuit triggers charging of the reserve battery. This feedback mechanism ensures the reserve battery is charged at the optimal moment to enable continuous device operation while avoiding premature charging that would reduce battery lifespan
3Reliability
If the reserve battery is kept at intermediate state of charge, then self-discharge and calendar aging are reduced, but the device may experience interruption when battery in use is discharged
Solution Approach 1:
The patent maintains the reserve battery in an intermediate state of charge (50-80%) as a preliminary condition, which optimizes battery lifespan by reducing calendar aging and self-discharge. The control circuit is pre-configured with threshold values that trigger charging of the reserve battery when the battery in use reaches critical levels, ensuring continuous device operation without requiring the reserve battery to be charged to 100% in advance
Data Source
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AI summary
The method according to the invention comprises the following steps: supplying at least one battery connected to an electrical appliance and forming at least one battery in use; supplying at least one battery disconnected from the electrical appliance and forming at least one reserve battery, the reserve battery having a predetermined intermediate charging state; determining at least one parameter value characteristic of the charging state of the battery in use; comparing the parameter value characteristic of the charging state of the battery in use with a predetermined threshold; and triggering the charging of a reserve battery until a predetermined maximum charging state is reached, which is higher than the predetermined intermediate charging state, according to the result of the comparison.