Battery Housing Current Collector Layout for Higher Energy Density
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Solution Overview
Problem
Current lithium-ion batteries face challenges in achieving high energy density to meet the increasing demands of electric vehicles and portable electronic devices.
Innovation Solution
A battery design featuring a housing with conductive wall bodies, insulation members, and active substance layers of opposite polarities, where the second active substance layer is placed on the first wall body serving as a current collector, optimizing the use of internal space to enhance energy density and reduce thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the battery uses conventional housing structure with separate current collectors, then the manufacturing is easier, but the energy density is lower and thickness is greater
Solution Approach 1:
The patent merges the housing wall body with the current collector function by making the first wall body conductive and using it as the first current collector. This integration eliminates separate current collector components and reduces overall battery thickness while increasing energy density by utilizing the housing material itself for both structural and electrical functions.
Solution Approach 2:
The first wall body serves multiple functions simultaneously: it provides structural support as part of the housing, acts as a current collector for electrical connections, and serves as a mounting surface for the second active substance layer. This multi-functionality reduces the number of separate components needed and increases space utilization for energy storage.
2Quantity of substance
If the battery optimizes space utilization by placing active substance layers on wall bodies, then the energy density increases, but the manufacturing precision requirements increase
Solution Approach 1:
By integrating the current collector function into the housing wall body, the patent eliminates the need for separate current collector components that would require precise alignment and attachment. The active substance layers are directly disposed on the conductive wall body surfaces, simplifying the manufacturing process while maintaining high space utilization and energy density.
3Length of moving object
If the battery reduces thickness by utilizing housing space, then the portability improves, but the insulation requirements increase
Solution Approach 1:
The patent introduces an insulation member as an intermediary component disposed between the first active substance layer (on the conductive first wall body) and the third wall body. This insulation member prevents unwanted electrical contact while allowing the battery to maintain reduced thickness by utilizing the internal space of the housing structure.
Solution Approach 2:
The patent applies different material properties to different parts of the housing structure: the first wall body is made conductive to serve as a current collector, while the third wall body or specific regions are made insulating to provide electrical isolation where needed. This localized differentiation of material properties allows simultaneous optimization of electrical conductivity and insulation in different areas.
Data Source
AI summary
A battery includes a housing; an insulation member; and a first active substance layer and a second active substance layer having opposite polarities. The housing includes a first wall body, a second wall body, and a third wall body, forming an accommodation cavity. The first wall body is a conductive wall body and disposed opposite to the third wall body. The insulation member, the first active substance layer, and the second active substance layer are accommodated in the accommodating cavity. The second active substance layer is disposed on a surface of the first wall body that faces the third wall body. The first active substance layer is disposed between the second active substance layer disposed on the surface of the first wall body and the third wall body. The insulation member is disposed between the first active substance layer and the second active substance layer.