Battery Charging Voltage Adjustment for Service Life
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Solution Overview
Problem
Conventional battery units have a shortened service life due to the thinning and weakening of the separation film during charging, which can lead to short circuits and safety hazards like explosions, especially when the battery's remaining lifetime is low.
Innovation Solution
An electronic device with a processing unit that calculates the remaining battery lifetime based on temperature and state of health (SOH), and adjusts the charging voltage to a lower potential when the lifetime is below a threshold, thereby prolonging the battery's service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If conventional charging is used with high electric potential, then charging speed is improved, but separation film thins and weakens leading to shortened service life
Solution Approach 1:
The charging voltage is dynamically adjusted based on the remaining lifetime of the battery unit. When the remaining lifetime is long, a first charging voltage with higher electric potential is applied for faster charging. When the remaining lifetime is short, a second charging voltage with lower electric potential is applied to protect the separation film and extend service life.
Solution Approach 2:
The electric potential parameter of the charging voltage is changed according to the battery's remaining lifetime. The system transitions from a static charging voltage approach to a dynamic one where the voltage parameter adapts to the battery's health status, thereby resolving the contradiction between charging speed and service life.
2Productivity
If high charging voltage is applied continuously, then charging efficiency is improved, but risk of short circuit and combustion increases
Solution Approach 1:
The system calculates the remaining lifetime of the battery unit in advance and takes preventive action by adjusting the charging voltage accordingly. When the remaining lifetime is short, the system proactively reduces the charging voltage to prevent separation film failure, short circuits, and combustion, rather than waiting for failure to occur.
Solution Approach 2:
The charging system incorporates feedback from the battery's state of health and remaining lifetime calculations. Based on this feedback, the charging voltage is automatically adjusted to maintain both charging efficiency and safety, preventing harmful effects while the battery is in a vulnerable state.
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
Precise calculation of battery lifetime and adaptive charging voltage adjustment effectively extend the battery's service life and reduce the risk of short circuits and safety hazards.
Implementation Method 1
a conventional battery unit is usually charged and discharged by oxidation-reduction (redox) reactions
Implementation Method 2
The separation film separates the cathode and the anode to prevent contact, and thus creation of a short circuit, between the cathode and the anode
Data Source
AI summary
A charging method includes calculating a remained lifetime of a battery unit based on a health state and a battery temperature of the battery unit, charging the battery unit by a charging voltage with a first potential when the remained lifetime is higher than a lifetime threshold, and charging the battery unit by the charging voltage with a second potential when the remained lifetime is smaller than or equal to the lifetime threshold.