Battery Cell Group Wedge Locking for Impact-Resistant Pack Stiffness
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Solution Overview
Problem
Existing battery technologies face challenges in improving stiffness and strength to withstand impacts and vibrations, leading to potential safety risks.
Innovation Solution
A battery design that includes a wedge-shaped component filling a gap between beams and the battery cell group, locking the cells securely within an enclosure, enhancing structural stability and strength through interaction forces among cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional battery structure without additional protective layers is used, then the device complexity is low, but the battery has poor expansion resistance and safety issues due to direct contact between aluminum foil and electrode materials
Solution Approach 1:
An intermediate protective layer is introduced between the aluminum foil and the electrode material. This protective layer acts as a mediator that prevents direct contact and harmful reactions while allowing ion transport, thereby improving expansion resistance without fundamentally changing the battery structure
Solution Approach 2:
The battery structure is segmented into distinct functional layers including the protective layer, electrode material, and aluminum foil. This segmentation allows each layer to perform its specific function independently, improving overall reliability while maintaining manageable structural complexity
2Ease of manufacture
If the aluminum foil is directly in contact with the electrode material, then the manufacturing process is simple, but harmful reactions occur leading to safety issues
Solution Approach 1:
The protective layer serves as an intermediary barrier that prevents harmful reactions between aluminum foil and electrode material while maintaining manufacturing simplicity through a straightforward layering process
Solution Approach 2:
The protective layer creates an inert environment between reactive components, preventing harmful chemical reactions while allowing the battery to be manufactured using conventional processes
3Productivity
If the battery structure is simplified without additional protective layers, then the device complexity is low, but ion transport is hindered leading to poor battery performance
Solution Approach 1:
The protective layer is designed with a porous structure that allows efficient ion transport while providing mechanical protection. The porous structure maintains high ion conductivity without requiring complex alternative designs
Solution Approach 2:
The protective layer has locally optimized properties with different regions designed for specific functions: some areas provide mechanical strength while others optimize ion transport, achieving high productivity without overall structural complexity
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 design improves the battery's stiffness and strength, reducing safety risks from vibrations and impacts while optimizing assembly efficiency and space utilization.
Implementation Method 1
a protective layer between the aluminum foil and the electrode material to prevent direct contact
Implementation Method 2
the protective layer has a porous structure... capable of transporting ions
Data Source
Figure 1~2
Figure 3~4(b)
Figure 5~6
AI summary
Provided in embodiments of the present application are a battery, a power consuming apparatus, and a method and apparatus for manufacturing a battery. The battery includes: a battery cell group including a plurality of battery cells arranged in a first direction; an enclosure including a first beam and a second beam that are arranged at an interval in the first direction, where the battery cell group is arranged between the first beam and the second beam, at least one of the first beam and the second beam is a locking beam, and a wedge-shaped gap is provided between the locking beam and the battery cell group; and a wedge-shaped component configured to fill the wedge-shaped gap, so as to lock the battery cell group to the enclosure. The technical solution described above can improve stiffness and strength of the battery, thereby improving performance of the battery.