Power Storage Cell Terminal Recess for Low-Height Bus Bar Connection
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Solution Overview
Problem
Existing power storage modules face challenges in easily arranging bus bars for connecting adjacent power storage cells due to their placement on the side surface of the case, making it difficult to facilitate electrical connections.
Innovation Solution
The power storage cell design includes a recessed second terminal portion on the external terminal, allowing for the placement of a bus bar within this recess, which is situated on a band surrounding the cells, enabling easy adjustment and connection of power storage cells while reducing module height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If external terminals are arranged on the side surface of the case to reduce module height, then the height of the power storage module is reduced, but it becomes difficult to arrange bus bars for electrical connections
Solution Approach 1:
The external terminal is designed with a second terminal portion that extends along the side surface of the case in the width direction, creating a multi-dimensional structure. This allows the terminal to maintain low height while providing lateral extension for bus bar connection, effectively resolving the contradiction between height reduction and connection ease.
Solution Approach 2:
A recess is provided on the second terminal portion, serving as an intermediary structure that facilitates bus bar arrangement. The recess acts as a mediator between the extended terminal and the bus bar, making it easier to position and connect the bus bar while maintaining the low-height configuration.
2Adaptability or versatility
If external terminal extends along the side surface, then electrical connection between adjacent cells is enabled, but the arrangement of bus bar becomes complex
Solution Approach 1:
The recess on the second terminal portion serves as an intermediary structure that simplifies bus bar arrangement. By providing this recessed space, the design mediates between the extended terminal configuration and the bus bar, making the overall arrangement less complex while maintaining electrical connection capability.
Data Source
AI summary
A power storage cell includes an electrode assembly, a cell case, and an external terminal. The cell case houses the electrode assembly. The external terminal is fixed to the cell case. The external terminal includes a first terminal portion and a second terminal portion. The first terminal portion is arranged above the cell case. The second terminal portion extends from the first terminal portion along the side surface of the cell case. The second terminal portion is provided with a recess. The recess is formed on a surface of the second terminal portion opposite to the other surface thereof that faces the cell case.