Battery Pack Binding Structure for Electrode Assembly Compression
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Solution Overview
Problem
Conventional battery packs fail to effectively compress electrode assemblies, leading to deterioration of output characteristics and poor interfacial contact between solid electrolytes and electrode layers, which affects the performance and stability of secondary batteries.
Innovation Solution
A battery pack design incorporating a binding mechanism that physically binds multiple battery units together using a coupling mechanism, providing a compressive force to compress the electrode assembly, thereby enhancing the interfacial contact and preventing output deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a binding mechanism is introduced to compress the electrode assembly, then output characteristics are improved and interfacial contact is enhanced, but device complexity increases
Solution Approach 1:
The battery pack is divided into multiple battery units arranged in series, with each unit containing an electrode assembly and case. The binding mechanism is applied at the pack level rather than individual cell level, segmenting the compression function to where it is most effective while simplifying individual component design.
Solution Approach 2:
The binding mechanism acts as an intermediary component between the battery units and the external environment, providing uniform compressive force to maintain interfacial contact between solid electrolytes and electrode layers without requiring modification of the electrode assemblies themselves.
2Power
If multiple battery units are connected in series to achieve high voltage, then voltage output increases, but the total thickness of the battery pack increases
Solution Approach 1:
Instead of arranging battery units in a simple linear sequence along one dimension, the units are arranged in a compact three-dimensional configuration. The binding mechanism applies compression along the thickness direction (first axis) while allowing flexible arrangement in lateral dimensions, effectively utilizing three-dimensional space to reduce overall thickness.
Solution Approach 2:
The binding mechanism dynamically adjusts the compression parameter (applying 99% or less of the original thickness) to optimize the balance between voltage output from multiple series-connected units and the total pack thickness, ensuring compact form factor while maintaining electrical performance.
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 binding mechanism effectively compresses the electrode assembly, improving output characteristics, preventing swelling, and maintaining high capacity and voltage performance by ensuring stable contact between the electrolyte and electrode layers.
Implementation Method 1
a binding mechanism configured to provide a binding force to physically bind together the plurality of battery units. The binding mechanism may be configured to compressive the plurality of battery units. The binding mechanism may be configured to provide a compressive force to one side or both sides of the plurality of battery units
Data Source
AI summary
A battery pack includes: a plurality of battery units arranged along a first axis; and a binding mechanism configured to provide a binding force to physically bind together the plurality of battery units. The binding mechanism includes: a front end plate and a rear end plate respectively at outer sides of one end position and another end position of the plurality of battery units along the first axis; a pair of side plates connecting the front end plate and the rear end plate to each other and extending across side surfaces of the plurality of battery units; and a coupling mechanism connecting at least one of the front end plate and the rear end plate with the pair of side plates.