Inductive Charge Balancing Circuit Error Detection
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Solution Overview
Problem
Charge balancing circuits for rechargeable storage arrangements face errors due to manufacturing variations in storage cells, leading to unbalanced charging and discharging, which can result in damage if not properly managed.
Innovation Solution
A method and circuit that utilize inductive storage elements to balance the charging states of storage cells by selectively coupling energy within the storage arrangement, including a drive circuit to manage switching elements and an error detection circuit to identify and address potential errors in the coupling process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If charge balancing circuits are used to balance charging states of storage cells, then the efficiency of storage arrangement is improved, but errors may occur due to manufacturing variations and component defects
Solution Approach 1:
The patent implements feedback by monitoring voltages across inductive storage elements during energy transfer and using this information to detect errors. The control circuit continuously evaluates voltage levels and compares them against expected values, enabling real-time detection of coupling errors, component defects, or abnormal conditions in the charge balancing circuit.
Solution Approach 2:
The patent introduces an intermediary error detection mechanism that mediates between the charge balancing operation and the control system. This intermediary layer monitors the energy transfer process through voltage sensing and provides error signals that trigger appropriate responses, isolating the detection function from the primary balancing operation.
2Ease of operation
If inductive storage elements are used for energy transfer between storage cells, then charge balancing is achieved, but errors such as missing inductive coupling or component defects may occur
Solution Approach 1:
The patent applies multi-functionality by designing the control circuit to perform both charge balancing control and error detection functions. The same voltage sensing infrastructure used for monitoring charging states is also utilized for detecting coupling errors and component defects, reducing the need for separate dedicated error detection hardware.
Solution Approach 2:
The patent merges the error detection functionality with the existing charge balancing control circuitry. By integrating voltage evaluation and error detection into a unified control system, the patent reduces overall device complexity while maintaining both charge balancing capability and error detection functionality.
3Manufacturing precision
If manufacturing variations cause capacitance unbalance in storage cells, then some cells reach voltage limits earlier, but charge balancing circuits can selectively charge/discharge individual cells to resolve this
Solution Approach 1:
The patent applies segmentation by dividing the charge balancing operation into cell-specific control paths. Each storage cell has its own inductive storage element and switching control, allowing independent monitoring and adjustment of each cell's charging state. This segmented approach enables precise handling of manufacturing variations without requiring complete redesign of the entire balancing system.
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 solution effectively balances the charging states of storage cells, preventing damage by detecting and mitigating errors in the coupling process, ensuring efficient operation and longevity of the storage arrangement.
Implementation Method 1
at least one second inductive storage element configured to be selectively coupled with a first one of the storage cells and inductively coupled to the first inductive storage element
Data Source
AI summary
Disclosed is a method for charge balancing in a charge storage arrangement having a plurality of charge storage cells connected in series, and a charge balancing circuit.