Secondary Battery Capacity Adjustment Apparatus Thermal Management
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Solution Overview
Problem
In assembled secondary battery systems, capacity adjustments to address differences in cell capacities lead to excessive heat generation during discharge, potentially damaging electronic components on the control board.
Innovation Solution
A secondary battery capacity adjustment apparatus and method that determines a priority order for capacity adjustments based on the mounted position of capacity adjusting sections on the control board, minimizing thermal influence and preventing overheating by prioritizing sections that are less likely to generate heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If capacity adjustment is performed by discharging multiple bypass resistors simultaneously, then capacity adjustment speed is improved, but heat generation becomes excessive causing control board overheating
Solution Approach 1:
The patent implements periodic action by dividing the capacity adjustment process into sequential phases rather than simultaneous execution. The control board adjusts bypass resistors in a predetermined sequence (first bypass resistor, then second bypass resistor, and so on), allowing heat to dissipate between adjustments. This periodic approach maintains productivity by completing all adjustments within a time period while preventing excessive temperature rise through staged execution.
Solution Approach 2:
The patent applies segmentation by dividing the control board into multiple adjustment sections, each responsible for specific bypass resistors. The first adjustment section handles the first bypass resistor, the second adjustment section handles the second bypass resistor, and so forth. This segmentation allows independent control of heat-generating operations in different spatial locations, preventing concentrated heat buildup while maintaining overall adjustment efficiency.
2Temperature
If capacity adjustment is performed sequentially one bypass resistor at a time, then heat generation is controlled, but adjustment time becomes excessively long
Solution Approach 1:
The patent implements dynamics by making the adjustment process adaptive and flexible rather than rigidly sequential. The control board dynamically selects which bypass resistors to adjust next based on current temperature conditions, capacity requirements, and predetermined sequences. This dynamic approach allows the system to accelerate adjustments when temperature permits and slow down when thermal limits are approached, optimizing both time efficiency and temperature control.
Solution Approach 2:
The patent applies parameter changes by varying the adjustment rate and sequence based on multiple parameters including temperature thresholds, capacity deviation magnitude, and predetermined priority sequences. The control board modifies operational parameters (which bypass resistors to adjust, when to adjust them, and at what rate) to balance speed and temperature control, rather than using a fixed sequential approach.
3Productivity
If multiple bypass resistors are adjusted simultaneously to reduce adjustment time, then productivity is improved, but reliability decreases due to potential overheating damage
Solution Approach 1:
The patent implements beforehand cushioning by establishing predetermined adjustment sequences and temperature thresholds before the capacity adjustment process begins. The control board is pre-programmed with safe operating parameters and sequential routines that prevent excessive heat accumulation. This preparatory cushioning measures protects electronic components from thermal damage by ensuring adjustments are always performed within safe thermal margins, maintaining reliability while achieving productivity through optimized sequencing.
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
Enables efficient residual capacity adjustments in a short time without causing local overheating of the control board, thereby protecting electronic components and ensuring the longevity of the battery system.
Implementation Method 1
a capacity adjusting section installed to correspond to each of the secondary batteries and configured to consume an electric power of a corresponding one of the secondary batteries
Data Source
AI summary
In secondary battery capacity adjustment apparatus and method for an assembled cell unit, the assembled cell unit includes: a plurality of secondary batteries; and a control board on which a capacity adjusting section is mounted, the capacity adjusting section being installed to correspond to each of the secondary batteries and configured to consume an electric power of a corresponding one of the secondary batteries to adjust a residual capacity of the corresponding one of the secondary batteries, a priority order of the secondary batteries to be capacity adjusted is determined in accordance with a mounted position of the capacity adjusting section corresponding to one of the secondary batteries on the control board and an electric power of each of the secondary batteries is caused to have consumed by the corresponding capacity adjusting section in accordance with the determined priority order to adjust a capacity of each of the secondary batteries.