Power storage module
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Solution Overview
Problem
The existing battery module configuration requires a large number of components due to insulated positive and negative external terminals, which increases complexity and reduces efficiency in connections.
Innovation Solution
A power storage module design where the case of each power storage device serves as either a negative or positive external terminal, eliminating the need for insulating members and allowing for direct electrical connection between cases, reducing component count and resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the positive external terminal and the negative external terminal are respectively insulated from the case, then electrical insulation is ensured, but the number of components increases
Solution Approach 1:
The patent merges the functions of the case and the external terminal by making the case itself conductive and serving as one of the external terminals. Specifically, the case is electrically connected to either the positive current collector or the negative current collector, eliminating the need for separate insulating members and reducing component count while maintaining proper electrical insulation through the series connection configuration of power storage device pairs
Solution Approach 2:
The case serves multiple functions: it provides mechanical housing for the electrode body, acts as a structural support, and simultaneously functions as an external terminal (either positive or negative) for electrical connection. This multi-functionality reduces the number of separate components needed while ensuring proper electrical insulation through the alternating polarity configuration
2Reliability
If insulating members are used for each external terminal, then electrical isolation is maintained, but connection resistance increases
Solution Approach 1:
By merging the case with the terminal function and creating direct electrical connections between cases in series pairs, the patent eliminates intermediate insulating members that would increase resistance. The direct case-to-case connection provides lower resistance pathways while maintaining electrical isolation through the alternating polarity configuration of the power storage device pairs
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 reduces the number of components needed and lowers resistance in connections between power storage devices, enhancing efficiency and simplifying the module configuration.
Implementation Method 1
the case is a first case electrically connected to the negative current collector of the electrode body and held at a negative electrode potential... and a second case electrically connected to the positive current collector of the electrode body and held at a positive electrode potential
Data Source
AI summary
A power storage module includes a power storage device pair having a first power storage device having a first case electrically connected to a negative current collector of an electrode body, and a positive external terminal connected to a positive current collector of the electrode body, and a second power storage device having a second case electrically connected to a positive current collector of an electrode body, and a negative external terminal connected to a negative current collector of the electrode body, and the first case and the second case are electrically connected to each other, while the first power storage device and the second power storage device are connected in series.