Pouch Cell Battery Pack Substrate Layout for Easier Assembly
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Solution Overview
Problem
The assembly of battery packs using pouch type cells with external substrates results in increased material costs and reduced component mounting area due to the need for longer flexible printed circuit boards, leading to interference with external substrates.
Innovation Solution
A battery pack design featuring a battery cell with a terrace supporting a first substrate connected via connection tabs, a detachable second substrate with flexibility, and a support member to prevent deformation, along with a protective film and marking line for efficient assembly and reduced interference with external substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flexible printed circuit board (FPCB) is used to connect the battery cell to the external substrate, then the battery pack can be assembled, but the FPCB length increases causing interference with the external substrate and reducing component mounting area
Solution Approach 1:
The substrate is divided into two separate substrates: a first substrate connected to the battery cell and a second substrate serving as the external substrate. This segmentation eliminates the need for a long FPCB, reducing interference and increasing component mounting area on the second substrate.
Solution Approach 2:
A connector is introduced as an intermediary component between the first substrate and the second substrate. This allows electrical connection without requiring a long flexible circuit board, thereby reducing space occupation and interference with the external substrate.
2Reliability
If a long flexible printed circuit board is used to connect the battery cell to the external substrate, then electrical connection is achieved, but material costs increase
Solution Approach 1:
The electrical connection path is segmented into discrete components: connection tabs on the battery cell, a connector on the first substrate, and corresponding connection structures on the second substrate. This eliminates the need for expensive long FPCB material while maintaining reliable electrical connection.
Solution Approach 2:
The invention uses simpler, cheaper connection structures (connection tabs and connectors) instead of expensive flexible printed circuit boards. These simpler components achieve the same electrical connection function at lower material cost.
Data Source
AI summary
The present disclosure relates to providing a battery pack that is easy to assemble and can reduce an interference region with an external substrate. To this end, the present disclosure provides a battery pack including a battery cell, a terrace extending from the battery cell, a first substrate disposed on the terrace and connected to the battery cell, a connector mounted on the first substrate, and a second substrate detachably coupled to the connector and extending to the outside of the battery cell.