Battery Assembly with Position-Dependent Resistors
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Solution Overview
Problem
Existing battery assemblies face challenges in efficiently managing current distribution and overcurrent protection, leading to variations in current drawn from each battery, which affects reliability and service life due to unequal resistance paths.
Innovation Solution
A battery assembly with integrated fuses and resistors on printed circuit boards, where the sizes of resistors vary based on distance to compensate for resistance differences, and deformable conductive sheets with fuses that disconnect upon overcurrent, ensuring uniform current distribution and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If batteries are arranged in series or parallel to obtain desired capacity or voltage, then power supply capability is improved, but current distribution becomes uneven due to resistance differences
Solution Approach 1:
The patent applies local quality by varying the resistance values of individual resistors based on their position in the battery assembly. Batteries farther from the connection point have lower resistance values to compensate for longer current paths, while closer batteries have higher resistance values. This localized adjustment of electrical properties ensures uniform current distribution across all batteries despite their different positions in the series/parallel arrangement.
2Reliability
If uniform current distribution is achieved through position-based resistance compensation, then reliability is improved, but device complexity increases due to varied resistor configurations
Solution Approach 1:
The patent implements parameter changes by systematically varying the resistance values of resistors based on their positional parameters within the battery assembly. Each resistor's resistance value is calculated and set according to its specific location relative to the connection point, creating a gradient of resistance values that compensates for path length differences. This parameter-based approach achieves uniform current distribution while maintaining a systematic rather than arbitrary configuration.
3Reliability
If fuses are integrated on printed circuit boards to provide overcurrent protection, then protection capability is improved, but manufacturing complexity increases due to integration requirements
Solution Approach 1:
The patent applies merging by integrating the fuse function directly into the printed circuit board that also serves as the structural support and electrical connection framework for the battery assembly. The fuse elements are incorporated into the PCB traces or as surface-mounted components on the same board that provides mechanical support and electrical connections, combining multiple functions (structural support, electrical connection, overcurrent protection) into a single integrated component rather than using separate discrete parts.
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 achieves minimal current variation (<12%) and effective overcurrent protection, enhancing the reliability and service life of the battery assembly by compensating for resistance differences and disconnecting fuses in case of overcurrent.
Implementation Method 1
The sizes of the resistors vary based on a distance between the batteries and a connection point to compensate for resistance differences from each battery to the connection point
Implementation Method 2
deformable and spring-supported flat conductive sheets that electrically connect batteries in parallel and/or series
Implementation Method 3
The conductive structure includes deformable and spring-supported flat conductive sheets that electrically connect batteries in parallel and/or series
Data Source
AI summary
A battery assembly that includes a plurality of batteries. The battery assembly includes a printed circuit board integrated with plural fuses and resistors. The sizes of the resistors vary based on a distance between the batteries and a connection point to compensate for resistance differences from each battery to the connection point.