Electrode Assembly Pressurization for Higher Battery Cell Energy Density
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Solution Overview
Problem
The challenge in battery cell production is to increase the energy density of battery cells, which is currently limited by the space occupied by the flattened layer of the electrode assembly.
Innovation Solution
A pressurizing apparatus is designed to reduce the height of the flattened layer of the electrode assembly by applying pressure, thereby reducing the internal space occupied in the battery cell, and increasing the energy density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the flattened layer of the electrode assembly is pressed to reduce its height, then the internal space occupied in the battery cell is reduced and energy density is increased, but the structural integrity and parallelism of the electrode assembly may be compromised
Solution Approach 1:
The pressurizing assembly is divided into multiple independent pressurizing units that can be distributed across the electrode assembly. Each unit independently applies pressure to local regions, ensuring uniform compression while maintaining overall structural integrity and parallelism of the flattened layers.
Solution Approach 2:
Different regions of the electrode assembly receive differentiated pressurization forces through the distributed pressurizing units. This allows local optimization of compression to maintain parallelism in critical areas while achieving overall volume reduction, addressing the contradiction between space reduction and manufacturing precision.
2Volume of moving object
If pressure is applied to reduce the height of the flattened layer, then energy density increases, but the complexity of the pressurizing system increases
Solution Approach 1:
The pressurizing assembly is designed as a multi-functional unit that can perform both pressurization and positioning functions simultaneously. This reduces the need for separate positioning devices and simplifies the overall system structure while achieving height reduction for increased energy density.
Solution Approach 2:
The pressurizing units are nested within or integrated into the existing battery cell structure, utilizing available space and existing components. This nesting approach minimizes additional system complexity while achieving the required pressurization function for volume reduction.
3Manufacturing precision
If the pressurizing assembly is positioned above the electrode assembly for effective pressurization, then pressurization accuracy is improved, but the device structure becomes more complex
Solution Approach 1:
The pressurizing assembly is merged with the support frame structure, combining the support function and pressurization function into a single integrated structure. This eliminates the need for separate positioning and pressurization systems, reducing overall structural complexity while maintaining pressurization accuracy through the integrated design.
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 pressurizing apparatus effectively reduces the height of the flattened layer and the occupied space within the battery cell, leading to an increase in energy density, thus enhancing the performance of electric vehicles and other battery-powered devices.
Implementation Method 1
the pressurizing assembly applies pressure to the electrode assembly, which can reduce the height of a flattened layer of the electrode assembly and the internal space of the battery cell occupied by the flattened layer of the electrode assembly
Data Source
AI summary
Embodiments provide a pressurizing apparatus, a battery, a battery cell, a processing method, and a production system. The pressurizing apparatus is configured to pressurize a flattened electrode assembly, and includes: a support member configured for placing the electrode assembly; and a pressurizing assembly configured to pressurize the electrode assembly, where the pressurizing assembly and the support member are disposed on two sides of a tab of the electrode assembly. The pressurizing apparatus in the embodiments can reduce the height of a flattened layer of the electrode assembly and the internal space of the battery cell occupied by the flattened layer of the electrode assembly, thus increasing the energy of the battery cell.