Current Collector Plate Assembly for Higher Battery Cell Current Flow
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Solution Overview
Problem
The connection region between a current collector plate and an electrode core in conventional battery cells is small, leading to insufficient current flow and excessive heat generation, which shortens the service life and reduces safety of the battery cell.
Innovation Solution
An electrode core assembly with a current collector plate featuring a first connection region and a second connection region, where the first connection portions have a minimum connection area of at least 20% of their orthographic projection area, ensuring stable and increased current flow by connecting to both the electrode core and the housing body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the connection region between current collector plate and electrode core is kept small, then the device complexity is reduced, but the current flow area is insufficient and heat generation increases
Solution Approach 1:
The current collector plate is divided into a connection region and an extension region. The connection region connects to the electrode core while the extension region extends toward the housing body, creating multiple functional zones that separately handle electrical connection and current flow distribution, thereby increasing effective connection area without excessive complexity
Solution Approach 2:
The current collector plate extends in multiple spatial dimensions - radially from the electrode core and axially toward the housing body. This three-dimensional configuration increases the effective connection area by utilizing both radial and axial directions, transforming a two-dimensional connection problem into a three-dimensional solution
2Reliability
If the connection region between current collector plate and electrode core is increased, then the current flow area is improved, but the device complexity increases
Solution Approach 1:
The current collector plate serves multiple functions: it connects to the electrode core, extends toward the housing body, provides electrical connection, and distributes current flow. This multi-functional design increases connection area while avoiding the need for separate dedicated components for each function, thereby limiting complexity increase
Solution Approach 2:
The connection region and extension region are merged into a single integrated current collector plate structure. This unified design provides both electrical connection and current flow distribution functions within one component, increasing effective connection area without the complexity of multiple separate parts
3Strength
If the minimum connection area between first connection portions and electrode core is increased to at least 20% of orthographic projection area, then connection strength is improved, but the device complexity increases
Solution Approach 1:
The current collector plate has different regional characteristics: the connection region is optimized for strong electrical connection to the electrode core with minimum area ≥20% of orthographic projection, while the extension region is optimized for current flow distribution toward the housing body. This localized optimization provides sufficient connection strength without requiring complex geometry throughout the entire structure
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
The solution enhances the connection strength and current flow area, improving the service life and safety of the battery cell by preventing insufficient current flow and heat generation.
Implementation Method 1
the plurality of first connection portions are electrically connected to the electrode core, and the second connection region located in one side of the first connection region is suitable for being electrically connected to a housing body
Data Source
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AI summary
An electrode core assembly (600), a battery cell (1000), a battery pack (2000), and an electric apparatus (3000) are provided. The electrode core assembly includes an electrode core (200) and a current collector plate (100). A first connection region (120) includes a middle portion (122) and a plurality of first connection portions (121) connected to the middle portion. A second connection region (130) is electrically connected to a housing body (500). An area of an orthographic projection of each of the first connection portions on a first plane is S1, a minimum connection area between each of the first connection portions and the electrode core is S, and S≥20%Si.