Connecting Tab With Bent Portion For Secondary Battery PCM
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Solution Overview
Problem
Existing secondary battery manufacturing processes require complex and costly methods for electrical connection between battery cells and protection circuit modules, leading to inefficiencies and potential for short circuits during assembly.
Innovation Solution
A connecting tab with a PCM mounting portion, bent portion, and terminal connecting portion, featuring cut-away portions and a support rib, simplifies the electrical connection between the secondary battery cell and protection circuit module, reducing assembly complexity and preventing short circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional manufacturing processes are used for electrical connection between battery cells and protection circuit modules, then connection reliability can be maintained, but manufacturing complexity and cost increase significantly
Solution Approach 1:
The patent combines the connection tab and the protection circuit module mounting structure into a single integrated component. The tab includes an integrated circuit board with mounting portions for the protection circuit module, eliminating the need for separate mounting structures and reducing assembly steps while maintaining connection reliability through unified design
Solution Approach 2:
The connection tab serves multiple functions simultaneously: it provides electrical connection between battery cells and protection circuit modules, serves as a mounting structure for the protection circuit module, and includes integrated support ribs for structural stability. This multi-functionality reduces the number of components needed and simplifies the manufacturing process
2Reliability
If complex assembly procedures are used to prevent short circuits, then connection safety is improved, but assembly time and complexity increase
Solution Approach 1:
The patent incorporates insulative coatings on the support ribs before assembly, providing preliminary protection against short circuits. The insulative properties are built into the structure in advance, preventing potential short circuits between the connection tab and battery can during assembly and operation without requiring complex additional protective measures
Solution Approach 2:
The support rib with insulative coating acts as an intermediary element between the conductive connection tab and the battery can. This intermediate insulative layer prevents direct electrical contact that could cause short circuits, while still allowing the structural support function to be performed
3Loss of energy
If traditional connection structures are used, then structural strength can be maintained, but power loss increases due to suboptimal bending angles
Solution Approach 1:
The patent optimizes the bending angle of the connection tab to specific values (45 degrees or 60 degrees) to minimize electrical resistance and power loss. The bent portion is designed with precise angular parameters that reduce energy loss during current flow, while the overall structure maintains sufficient mechanical strength through the integrated support rib design
Data Source
AI summary
A connecting tab connected between an electrode terminal of a cap plate and an electrode terminal of a protection circuit module (PCM) in a secondary battery. The connecting tab includes a PCM mounting portion, a bent portion and a terminal connecting portion. The PCM mounting portion is connected to the electrode terminal of the PCM. The bent portion is extended from the PCM mounting portion and makes a predetermined angle with the PCM mounting portion, and has at least one cut-away portion formed therein. The terminal connecting portion is formed bent portion on the same plane with the bent portion, and extended in a lateral direction from an upper portion of the bent portion. Accordingly, an electrical connection between a secondary battery cell and the PCM can be performed only through a simple process by using the connecting tab provided with the bent portion.