Adaptive Battery Charging Current for Faster Full-Charge Cycles
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Solution Overview
Problem
Current battery charging methods, such as constant current and constant voltage charging, result in prolonged charging times and potential battery damage due to polarization and electrolyte consumption, while existing fast charging methods do not efficiently adjust charging currents based on battery state, leading to suboptimal cycle life.
Innovation Solution
A method that involves determining the lithium deposition potential and charging rates of a battery's anode at different temperatures to establish optimal charging currents, dynamically adjusting the charging current based on the state of charge to prevent lithium deposition and minimize electrolyte-cathode reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If constant current charging is used to charge the battery, then charging speed is improved, but polarization phenomenon occurs and battery does not reach fully charged state
Solution Approach 1:
The patent implements dynamic charging current adjustment based on real-time battery state monitoring. The charging current is not fixed but varies continuously according to battery voltage, temperature, and charge state, allowing the system to optimize between charging speed and charging completeness by adapting to changing battery conditions during the charging process.
Solution Approach 2:
The patent employs feedback mechanisms by continuously monitoring battery parameters (voltage, current, temperature) and using this information to adjust the charging current. The system measures the battery state and feeds this information back to the charging control unit, which then modifies the charging current to prevent polarization while ensuring complete charging.
2Reliability
If constant voltage charging is used after constant current charging, then battery reaches fully charged state, but charging time is too long
Solution Approach 1:
The patent replaces the static two-stage charging process with a dynamic single-stage charging process where the current continuously adapts to battery state. This dynamic approach eliminates the need for a separate constant voltage stage by maintaining optimal current levels throughout charging, significantly reducing total charging time while ensuring complete charging.
Solution Approach 2:
The patent maintains continuous effective charging action by adjusting current to remain optimal throughout the entire charging process. Instead of switching between constant current and constant voltage modes with transitions and idle periods, the system maintains continuous adaptive charging that keeps the battery in an optimal charging state throughout, eliminating time losses associated with mode transitions.
3Loss of time
If high voltage charging is used to reduce charging time, then charging speed is improved, but battery structure damage and electrolyte consumption occur
Solution Approach 1:
The patent dynamically changes charging parameters (current, voltage) based on real-time battery state monitoring. Instead of applying fixed high voltage that causes damage, the system adjusts voltage and current levels according to battery charge state, temperature, and other parameters, maintaining high charging speed while preventing structural damage through parameter optimization.
Solution Approach 2:
The patent implements dynamic parameter adjustment where charging voltage and current are not fixed but continuously adapted to battery conditions. This dynamic control prevents the application of excessively high voltage that would cause electrolyte consumption and structural damage, while still achieving fast charging through optimized real-time parameter selection.
4Loss of time
If existing fast charging methods are used, then charging time is reduced, but charging current is not adjusted according to battery state
Solution Approach 1:
The patent implements comprehensive feedback control by continuously monitoring battery state (voltage, current, temperature, charge state) and using this feedback to dynamically adjust charging current. This closed-loop control system ensures charging current is always optimized for the current battery state, maximizing charging efficiency while preventing damage, unlike open-loop fast charging methods.
Solution Approach 2:
The patent transforms static fast charging methods into dynamic adaptive charging by continuously adjusting current based on real-time battery state. The system monitors multiple parameters and dynamically modifies charging current to match optimal charging requirements at each moment, achieving both fast charging and high efficiency through continuous adaptation.
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 approach significantly shortens charging time, reduces battery degradation, and extends the battery's cycle life by optimizing charging currents and preventing adverse reactions, thus achieving faster and more efficient charging while protecting the battery.
Implementation Method 1
a first charging step, after the battery is discharged to a fully discharged state, charging the battery with a first predetermined current until the battery is fully charged
Implementation Method 2
determining whether the lithium deposition phenomenon occurs in the battery; determining the lithium deposition charging rate of the battery
Data Source
AI summary
A charging method for charging a battery, including the following steps: obtaining a lithium deposition potential of the anode; obtaining a first charging current In at different states of charge (SOC) during an nth charge and discharge cycle based on the lithium deposition potential of the anode, the n is an integer greater than or equal to 0; and during an mth charge and discharge cycle, charging the battery with a second charging current Im, m is an integer greater than n, and Im=k1×In, 0.5≤k1≤1. The present application also provides an electronic device and a storage medium. The above-mentioned charging method, electronic device and storage medium can quickly charge the battery.