Battery Assembly Resistive Compensation Traces
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Solution Overview
Problem
Existing battery assemblies face challenges in ensuring uniform current distribution among batteries due to resistance differences, leading to reliability and service life issues.
Innovation Solution
The battery assembly incorporates printed circuit boards with integrated fuses and compensation traces of varying resistance to minimize current variations, where the resistance of the traces increases closer to the connection point, ensuring balanced current distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If batteries are arranged in series or parallel to obtain desired capacity or voltage, then power output requirements are met, but resistance differences cause non-uniform current distribution
Solution Approach 1:
The patent applies local quality by making the compensation traces have different resistance values at different locations. Specifically, traces closer to the connection point have higher resistance while those farther away have lower resistance, creating a non-uniform resistance distribution that compensates for the varying path lengths and achieves uniform current distribution across all batteries.
2Reliability
If compensation traces with varying resistance are introduced, then current distribution uniformity is improved, but device complexity increases
Solution Approach 1:
The patent merges the compensation function with the existing PCB structure by integrating compensation traces directly into the circuit board. This combines the current distribution function with the structural support and electrical connection functions of the PCB, avoiding the need for separate compensation components and reducing overall device complexity.
Solution Approach 2:
The patent changes the resistance parameter of the compensation traces to achieve uniform current distribution. By carefully selecting different resistance values for traces at different locations, the system compensates for path resistance differences without requiring complex control mechanisms or additional active components.
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
This design achieves a current value variation of less than 12%, enhancing the reliability and service life of the battery assembly by compensating for resistance differences and maintaining uniform current distribution.
Implementation Method 1
sizes of the compensation traces vary based on a distance between the second conductive shapes and a connection point on the bus line to compensate for resistance differences from each battery to the connection point
Data Source
Figure 1A~1C
Figure 2
Figure 3~4
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.