Lead Battery Sulfation Control via Temperature-Adaptive Refresh Charging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lead storage batteries used in electric vehicles often experience deficient charging due to temperature variations, leading to sulfation, which cannot be effectively eliminated by existing charging methods, resulting in reduced battery performance and lifespan.
Innovation Solution
A charging control method that includes a temperature-measuring unit, a full charging controller, a refresh charging controller, and a refresh charging quantity setter, which adjusts the refresh charging quantity based on the battery's temperature throughout the deficient charging period to effectively eliminate sulfation by setting the content rate of lead sulfate within specific ranges on the positive and negative electrode plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If constant current charging is performed without temperature adjustment, then charging speed is maintained, but charging efficiency becomes insufficient at low temperatures and excessive at high temperatures
Solution Approach 1:
The patent applies parameter changes by adjusting the charging current based on battery temperature. The charging control unit modifies the charging current parameter according to detected battery temperature, reducing current at low temperatures to prevent insufficient charging and limiting current at high temperatures to prevent overcharging, thereby resolving the contradiction between maintaining charging speed and ensuring charging efficiency across different temperature conditions
Solution Approach 2:
The patent implements feedback control by continuously detecting battery temperature and using this information to adjust the charging current. The charging control unit receives temperature feedback from the detection unit and dynamically modifies the charging current parameter, creating a closed-loop control system that adapts to temperature variations and maintains optimal charging efficiency
2Reliability
If refresh charging quantity is increased to eliminate sulfation, then sulfation removal effect is enhanced, but charging time and energy consumption increase
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the refresh charging quantity based on battery temperature. The charging control unit calculates the appropriate refresh charging quantity using temperature-dependent parameters, ensuring sufficient charging to eliminate sulfation while optimizing charging time and energy consumption according to actual battery conditions
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
The method enhances the elimination of sulfation, thereby improving the battery's performance and extending its lifespan by accurately reflecting temperature-induced sulfation and adjusting the charging quantity accordingly.
Implementation Method 1
a temperature-measuring unit
Implementation Method 2
a charging unit for charging the lead storage battery
Implementation Method 3
perform refresh charging of charging the lead storage battery with a predetermined refresh charging quantity of electricity, after the lead storage battery has been fully charged
Data Source
AI summary
Disclosed is a charging control method including: a full charging step of charging a lead storage battery until the battery is fully charged; a refresh charging step of performing refresh charging of charging the lead storage battery with a predetermined refresh charging quantity of electricity after the lead storage battery has been fully charged; and a refresh charging quantity setting step of setting the refresh charging quantity of electricity in the refresh charging step for the lead storage battery which has been fully charged at a present time, depending on a temperature of the lead storage battery throughout a deficient charging period, the deficient charging period being a period from a time when the lead storage battery has been fully charged at a previous time to a time when the lead storage battery has been fully charged at the present time in the full charging step.