Battery Channel Grouping for Synchronized Charge-Discharge Control
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Solution Overview
Problem
Secondary batteries connected to different channels in a charging and discharging device often experience performance imbalances due to varying end times of charging and discharging processes, which can be exacerbated by temperature differences, affecting the overall efficiency and stability of battery performance.
Innovation Solution
A controlling method for a charging and discharging device that selects multiple channels within the same unit or chamber, allowing for simultaneous initiation and completion of charging and discharging steps at specific temperatures, ensuring all batteries are fully charged or discharged before proceeding to the next step, thereby minimizing the impact of temperature variations and performance differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple channels are used to charge and discharge secondary batteries simultaneously, then productivity is improved, but performance imbalance between batteries occurs due to different end times of charging and discharging processes
Solution Approach 1:
The system segments batteries into different temperature groups (first temperature group, second temperature group, third temperature group) based on their charging and discharging completion status. This segmentation allows independent temperature control for each group, ensuring that batteries at different stages of the formation process are maintained at appropriate temperatures without affecting each other, thus resolving the performance imbalance issue while maintaining high productivity
Solution Approach 2:
The system performs preliminary temperature adjustment by standing batteries at specific temperatures (first standing at second temperature, second standing at third temperature) before proceeding to the next charging or discharging step. This preliminary action ensures that all batteries are ready for the next phase simultaneously, preventing performance degradation due to temperature differences and maintaining consistency across all channels
2Device complexity
If temperature differences are not controlled during charging and discharging, then device complexity is reduced, but battery performance stability deteriorates
Solution Approach 1:
The system dynamically changes temperature parameters based on the charging and discharging status of batteries. Different temperature groups are assigned different temperatures (first temperature, second temperature, third temperature) according to their specific needs. This parameter change approach maintains battery performance stability without requiring overly complex control systems, as the temperature adjustments follow a systematic pattern based on process stage
Data Source
AI summary
The present disclosure relates to a controlling method of a charging and discharging device, using a charging and discharging device including a plurality of units, wherein the units include a plurality of chambers accommodated in the units, wherein the chambers include a plurality of channels accommodated in the chambers, and wherein the channels charge or discharge secondary batteries, comprising: selecting a plurality of channels, each of which is connected to a secondary battery; and charging-and-discharging each of the secondary batteries connected to the selected plurality of channels, wherein the selecting a plurality of channels includes selecting the plurality of channels in a same unit.