Series-Multiple Battery Pack Management with Compensation Algorithms
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Solution Overview
Problem
Current series-multiple lithium battery management systems face challenges in measurement precision, particularly in high-voltage environments, leading to significant measurement errors over multiple cycles and a lack of effective measures for emergency situations, which do not meet the stringent requirements of the unmanned aerial vehicle industry.
Innovation Solution
A series-multiple battery pack management system comprising electric quantity measurement modules connected to each battery pack, a controller for managing these modules, and additional modules for impedance tracking, communication isolation, intra- and inter-battery balancing, voltage step-up driving, and reverse connection prevention, enabling in-depth learning for accurate parameter compensation and precise battery state monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If two measurement chips are adopted in series-multiple lithium battery management system, then voltage measurement capability is improved, but measurement precision deteriorates due to environmental influence and cumulative errors
Solution Approach 1:
The patent implements a feedback mechanism where the controller continuously monitors voltage measurements from multiple chips and compares them against expected values. When deviations are detected, the system adjusts measurement parameters or triggers recalibration, thereby maintaining precision over multiple charge-discharge cycles despite environmental variations.
Solution Approach 2:
The patent introduces an intermediary processing layer in the controller that mediates between the measurement chips and the battery management decisions. This intermediary layer filters out environmental noise, corrects systematic errors, and integrates measurements from multiple chips through algorithms that compensate for cumulative drift, thereby improving overall measurement reliability.
2Adaptability or versatility
If conventional battery management system is used, then system complexity is reduced, but adaptability to emergency situations deteriorates
Solution Approach 1:
The patent implements preliminary action by pre-configuring multiple measurement chips and emergency response protocols before actual battery operation. The system pre-establishes measurement redundancy and pre-programmes the controller with algorithms to detect and respond to various failure modes, enabling rapid adaptation to emergency situations without requiring complex real-time decision-making.
Solution Approach 2:
The patent applies dynamics by making the measurement system adaptable and reconfigurable. The controller dynamically adjusts measurement parameters, selects active measurement chips based on their health status, and modifies measurement frequencies according to battery state and environmental conditions, thereby improving emergency adaptability without permanently increasing system complexity.
Data Source
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AI summary
The present application discloses a series-multiple battery pack management system, including: a plurality of series-multiple battery packs; a plurality of electric quantity measurement modules, respectively connected to the plurality of series-multiple battery packs to obtain parameter information of the plurality of series-multiple battery packs, and further obtain compensation parameters according to the parameter information; and a controller, respectively connected to the plurality of electric quantity measurement modules, and configured to manage the plurality of series-multiple battery packs according to the compensation parameters. By using the series-multiple battery pack management system of the present application, relatively accurate current electric quantity information and a relatively accurate current battery use status can be obtained, so that the battery electric quantity of the battery management system can be measured more accurately.