Battery Pack Pre-Charging With Adaptive Retry Thresholds
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Solution Overview
Problem
Existing pre-charging systems fail to account for interference during the pre-charging process, leading to potential machinery failure and user inconvenience, as seen in U.S. Pat. No. 11,342,772, which does not permit additional pre-charging attempts after a failure.
Innovation Solution
A pre-charging controller that adjusts pre-charging thresholds by setting a second voltage and current threshold following a failed initial pre-charging operation, allowing a subsequent pre-charging attempt to ensure successful connection of a load to a battery pack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pre-charging controller does not permit additional pre-charging attempts after detecting a failure, then the system maintains strict safety control, but the machine becomes stranded and user experience deteriorates
Solution Approach 1:
The pre-charging controller dynamically adjusts the number of permitted pre-charging attempts based on the operational context. After a first pre-charging attempt fails, the controller permits a second pre-charging attempt, thereby adapting the system's rigidity to balance safety requirements with operational continuity needs.
2Ease of operation
If the pre-charging controller permits additional pre-charging attempts after failure, then machine availability improves, but the risk of repeated failure and potential damage increases
Solution Approach 1:
The controller changes the parameter of permitted pre-charging attempts from a fixed value to a conditional value. Initially, the controller permits one attempt; upon failure, it adjusts to permit a second attempt with modified conditions, thereby managing the risk while maintaining operational availability.
3Device complexity
If the pre-charging controller uses fixed voltage and current thresholds, then the control logic is simple, but it cannot adapt to interference during pre-charging operations
Solution Approach 1:
The controller dynamically adjusts pre-charging parameters including voltage thresholds, current thresholds, and time thresholds based on the operational context. After a first pre-charging attempt fails, the controller modifies these parameters for the second attempt, enabling adaptation to interference while maintaining manageable control logic complexity.
Solution Approach 2:
The controller changes multiple parameters simultaneously - voltage threshold, current threshold, and time threshold - to adapt to the pre-charging conditions. This multi-parameter adjustment enables the system to handle interference during pre-charging operations while keeping the control logic structured and manageable.
Data Source
AI summary
A pre-charging controller may compare a pre-charging voltage of a machine component to a first voltage threshold. The pre-charging controller may compare a pre-charging current of the machine component to a first current threshold. The pre-charging controller may set a second voltage threshold and a second current threshold as a result of the pre-charging voltage being below the first voltage threshold and the pre-charging current being above the first current threshold.