Battery Electrode Lamination Layout Without Packaging Through-Holes
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Solution Overview
Problem
The existing current collecting plate disposition structure for batteries requires an outer packaging member with a through-hole for voltage monitoring terminals, restricting the structural efficiency and complexity of the battery design.
Innovation Solution
A battery design where end-surface current collectors are disposed on both surfaces of the electrode laminated body, with internal current collectors having connection portions drawn out from the side surface and extending along the lamination direction, allowing for insulation and placement on the same surface as the end-surface current collectors, eliminating the need for a through-hole in the outer packaging member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the voltage monitoring terminal is drawn out through an outer packaging member with a through-hole, then the terminal can be connected to the outside, but the structural efficiency is reduced and the outer packaging member structure is restricted
Solution Approach 1:
The voltage monitoring terminal connection function is extracted from the outer packaging member structure. Instead of requiring a through-hole in the outer packaging, the terminal is drawn out through the sealing material itself, separating the connection function from the packaging structure and eliminating the need for complex packaging modifications
Solution Approach 2:
The sealing material is given multiple functions: it not only seals the battery but also serves as the pathway for drawing out the voltage monitoring terminal. This multi-functionality eliminates the need for separate through-holes in the outer packaging member, simplifying the overall structure
2Area of stationary object
If the connection portion is disposed on the same surface as end-surface current collectors, then the area occupied is reduced, but insulation between connection portions and current collectors becomes critical
Solution Approach 1:
An insulation layer is introduced as an intermediary element between the connection portion and the end-surface current collector. This thin insulating layer prevents electrical contact while allowing the connection portion to be disposed on the same surface, achieving both area reduction and insulation reliability
Solution Approach 2:
Insulation is applied locally only where needed - specifically at the interface between the connection portion and the current collector surface. This localized insulation approach provides necessary electrical isolation without adding global structural complexity or significant area
Data Source
AI summary
A battery is a battery comprising an electrode laminated body, in which: end-surface current collectors are disposed on both surfaces of the electrode laminated body in a lamination direction; an internal current collector is laminated in the interior of the electrode laminated body; the internal current collector includes a connection portion that is drawn out from a side surface of the electrode laminated body; and the connection portion extends along the side surface of the electrode laminated body in the lamination direction, and is disposed on an identical surface to a surface on which at least one of the end-surface current collectors is disposed.