Integrated Lead Terminal Design for Battery Modules
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Solution Overview
Problem
The existing electricity storage modules require time-consuming operations for connecting lead terminals and detection terminals as the number of power storage elements increases, necessitating a simplification of this process.
Innovation Solution
The electricity storage module integrates lead terminals with both terminal connection and detection terminal portions, eliminating the need for separate detection terminals and simplifying the connection process by using the same metal material for these components and incorporating holding members with terminal accommodation portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of power storage elements increases, then the electricity storage module can store more energy, but the number of detection terminals increases and the connection operation becomes time-consuming
Solution Approach 1:
The lead terminal is designed to integrate both the terminal connection portion for electrical connection and the detection terminal portion for state detection. This merging of functions eliminates the need for separate detection terminals, thereby reducing the number of connection operations required when power storage elements are increased.
Solution Approach 2:
The lead terminal serves multiple functions: it provides electrical connection through the terminal connection portion and enables state detection through the detection terminal portion. This multi-functionality allows a single component to replace what would traditionally require multiple separate components, reducing assembly time as the system scales.
2Reliability
If separate detection terminals are used, then detection functionality is provided, but the connection operation between lead terminals and detection terminals becomes complex and time-consuming
Solution Approach 1:
The lead terminal integrates both connection and detection functions into a single component. The terminal connection portion maintains electrical connection while the detection terminal portion provides state detection, eliminating the need for separate detection terminals and simplifying the connection operation.
3Reliability
If different metal materials are used for lead terminals and detection terminals, then functional requirements are met, but corrosion occurs at the contact portion
Solution Approach 1:
The lead terminal is made of a single metal material that is homogeneous throughout both the terminal connection portion and the detection terminal portion. This eliminates galvanic corrosion that would occur at the interface between dissimilar metals, while still meeting all functional requirements for electrical connection and state detection.
Data Source
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AI summary
An electricity storage module includes a power storage element group (11) obtained by stacking a plurality of power storage elements (12) each having a lead terminal (13) that protrudes from a side edge. The lead terminals (13) are each provided with a terminal connection portion (17) for electrically connecting the lead terminals (13) that are adjacent in a direction in which the power storage elements (12) are stacked, and a detection terminal portion (18) that is electrically connectable to a device for detecting and controlling states of the respective power storage element (12).