Secondary Battery Electrode Plate With Bent Conductive Connection
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Solution Overview
Problem
Existing secondary batteries face challenges in improving current passing capacity and energy density due to the large space requirement for conductive structures, which are necessary to connect the current collector to the electrode terminal.
Innovation Solution
The electrode plate design includes a current collector with an insulating layer and two conductive layers, where the conductive members are connected through a bent configuration, reducing the need for additional soldering and minimizing the overall thickness and space taken by the conductive structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional conductive structures with additional metal sheets are used to connect current collector to electrode terminal, then current passing capacity is ensured, but space occupied by conductive structure increases and energy density decreases
Solution Approach 1:
The patent merges the current collector and conductive structure into a single integrated component. The current collector is designed with protruding sections that directly extend to connect with electrode terminals, eliminating the need for separate additional metal sheets. This integration reduces the overall space occupied by conductive structures while maintaining current passing capacity, thereby improving energy density.
Solution Approach 2:
The current collector serves multiple functions: it collects current from the active material layer through its body section, provides structural support, and directly connects to electrode terminals through its protruding sections. This multi-functionality eliminates the need for separate conductive members, reducing space requirements and improving energy density.
2Reliability
If additional metal sheets are used to create current channels between sandwich structure and electrode terminal, then current passing capacity is improved, but device complexity and manufacturing complexity increase
Solution Approach 1:
The patent combines the current collector and conductive structure into one integrated component. The current collector includes protruding sections that directly form the connection path to electrode terminals, eliminating the need for separate additional metal sheets. This simplification reduces device complexity while maintaining reliable current passing capacity.
3Reliability
If traditional conductive structure with multiple separate components is used, then connection reliability is ensured, but overall thickness and space requirement increase
Solution Approach 1:
The patent integrates the current collector and conductive structure into a single component where the current collector includes protruding sections that directly connect to electrode terminals. This integration eliminates gaps and interfaces between separate components, maintaining connection reliability while reducing the overall thickness and space requirement of the conductive structure.
Data Source
AI summary
An electrode plate includes an active material layer, a current collector including an insulating layer and first and second conductive layers sandwiching the insulating layer, and a conductive structure. The conductive structure includes a first conductive member including a first section arranged along a side of the first conductive layer and a second section extending from the first section and beyond the current collector in a direction away from the active material layer, and a second conductive member including a first connecting section connected to the second conductive layer, a bent section connected to the first connecting section and bent towards the first conductive member relative to the first connecting section, and a second connecting section bent backward relative to the bent section to be sandwiched between the first section and the first conductive layer.