Battery Tab Connector Pattern for Vibration-Resistant Bonding
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Solution Overview
Problem
Existing battery packs face challenges in maintaining strong bonding between tab connection portions and electrode tabs, leading to potential electrical disconnection due to external vibrations and mechanical stress.
Innovation Solution
The battery pack incorporates an anisotropic conductive film between the negative electrode tab and its connector, with a circuit board design featuring a reference line and auxiliary lines that include protrusion patterns, enhancing the bonding strength and electrical connectivity by allowing the binder to move within slits between the auxiliary lines, thus improving resistance to external vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a simple flat connector design is used, then the device complexity is reduced, but the bonding strength between the tab connector portion and electrode tab deteriorates under external vibrations
Solution Approach 1:
The connector structure is segmented into reference lines and multiple auxiliary lines with protrusion patterns, creating a divided structure that enhances bonding strength while maintaining manageable complexity through systematic repetition of modular elements
Solution Approach 2:
The connector design transitions from a simple flat pattern to a multi-dimensional structure with protrusions extending in the length direction, creating three-dimensional bonding features that improve mechanical strength without significantly increasing overall complexity
2Reliability
If the connector structure is simplified, then the ease of manufacture is improved, but the reliability of electrical connection deteriorates due to potential disconnection from vibrations
Solution Approach 1:
The protrusion patterns are pre-formed on the connector before assembly, creating built-in mechanical interlocking features that prevent vibration-induced disconnection, ensuring reliable electrical connection without requiring complex assembly procedures
Solution Approach 2:
The connector has different structural properties in different regions: reference lines provide structural framework while auxiliary lines with protrusions provide enhanced local bonding, creating a design that balances manufacturing simplicity with connection reliability through localized feature enhancement
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 effectively prevents deterioration in bonding strength and facilitates reliable electrical connection between the tab connector portions and electrode tabs, ensuring stable operation even under external vibrations.
Implementation Method 1
an anisotropic conductive film interposed between the negative electrode tab and the negative electrode tab connector portion and electrically connecting the negative electrode tab and the negative electrode tab connector portion
Data Source
AI summary
A battery pack is proposed. The battery pack may include an electrode assembly, a circuit board having a positive electrode tab connector portion, and a negative electrode tab connector portion, and an anisotropic conductive film interposed between the negative electrode tab and the negative electrode tab connector portion. The negative electrode tab connector portion may include a reference line extending along the length of the circuit board and a plurality of auxiliary lines extending from the reference line along the width direction of the circuit board and spaced apart from each other. Each of the plurality of auxiliary lines may include an auxiliary line-center line extending along the width direction and one or more protrusion patterns protruding from the auxiliary line-center line along the length direction. The battery pack can improve bonding strength between a tab connection portion and an electrode tab and can be easily electrically connected.