Module Terminal Interference Preventive Member
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Solution Overview
Problem
In secondary battery modules for electric vehicles, the screwing process for connecting male screws to terminal components can inadvertently damage the battery cells or cause short circuits due to interference with the battery cell body or terminals.
Innovation Solution
A module terminal design incorporating a metallic terminal main body with an insulative interference preventive member that interposes between the male screw and the battery pack, featuring a female screw portion and a slidable, biasable interference preventive member to prevent contact with the battery cell body or terminals, thereby avoiding damage and short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a male screw is screwed into the terminal to fix electric wiring, then the electric wiring can be securely connected, but the male screw may interfere with the battery cell body or terminal and cause damage or short circuit
Solution Approach 1:
An insulative interference preventive member is introduced as an intermediary component between the male screw and the battery cell. This member includes a wall portion that physically blocks the male screw from contacting the battery cell body or terminal, while allowing the male screw to be screwed into the female screw portion of the terminal. The intermediary member thus enables secure wiring connection while preventing harmful interference.
Solution Approach 2:
The terminal structure is segmented into distinct functional portions: the terminal portion for electrical connection, the interference preventive member for protection, and the female screw portion for fastening. This segmentation allows each component to perform its specific function independently, with the interference preventive member being a separate detachable component that can be mounted on the terminal main body.
2Reliability
If an interference preventive member is added to prevent male screw interference, then damage and short circuits are avoided, but the terminal structure becomes more complex
Solution Approach 1:
The interference preventive member is designed as a separate, detachable component rather than an integrated part of the terminal. This segmentation allows for simple assembly and disassembly, minimizing the impact on overall terminal structure complexity while still providing the necessary protection function.
Solution Approach 2:
The interference preventive member serves as a simple intermediary component with a straightforward structure consisting of a mounting portion and a wall portion. This simple design minimizes the added complexity while effectively performing the protection function, as it only requires mounting on the terminal main body and positioning the wall portion between the male screw and battery cell.
Data Source
AI summary
A module terminal includes a terminal main body which is made of a metal plate and an insulative interference preventive member which is mounted on the terminal main body. In the terminal main body, one end portion is connected electrically to an electrode of a battery pack, and a female screw portion is formed integrally on a terminal portion to penetrate therethrough. While a distal end of a male screw faces an end face of the battery pack when the male screw into the female screw portion, the interference preventive member is disposed therebetween.