Battery Cell Electrode-Adapter Winding for Higher Current Capacity
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Solution Overview
Problem
Existing battery cells face limitations in current passing capacity due to limited electrical connection area between the electrode and the adapter, leading to reduced output power, charging/discharging rates, and increased risk of overheating.
Innovation Solution
The electrode piece is partially wound around the adapter and affixed to it, eliminating the need for welding and increasing the contact area, while incorporating a clamping slot and through holes to enhance conductivity and electrolyte accommodation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If welding process is used to connect electrode piece to adapter, then electrical connection is established, but metallic particles are generated causing short circuit risk and reduced reliability
Solution Approach 1:
The patent extracts and eliminates the welding process from the connection method. Instead of welding the electrode piece to the adapter, the invention uses the electrode piece's own tension after winding around the adapter to maintain electrical connection, thereby removing the source of metallic particles and short circuit risks.
Solution Approach 2:
The patent replaces the welding mechanical system with a tension-based mechanical system. The electrode piece is wound around the adapter and held in place by its own tension, substituting the thermal-mechanical welding process with a purely mechanical tension-based holding mechanism that avoids harmful byproducts.
2Power
If contact area between electrode piece and adapter is increased, then current passing capacity is improved, but device complexity increases
Solution Approach 1:
The patent transitions from point or line contact to surface contact by winding the electrode piece around the adapter in a spiral configuration. This dimensional change from 0D/1D contact to 2D surface contact significantly increases the contact area and current passing capacity without requiring complex multi-component connection structures.
Solution Approach 2:
The electrode piece is divided into multiple winding turns around the adapter, creating multiple contact zones distributed along the adapter surface. This segmentation approach increases total contact area while maintaining structural simplicity through the continuous winding configuration.
3Object-generated harmful factors
If electrode piece is wound around adapter and affixed by tension, then welding is eliminated reducing metallic particles, but connection strength may be insufficient
Solution Approach 1:
The electrode piece is pre-tensioned during the winding process around the adapter. This preliminary application of tension ensures that the electrode piece maintains sufficient contact pressure and electrical connection strength with the adapter without requiring subsequent welding or additional fastening mechanisms.
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
This approach enhances the current passing capacity, reduces the risk of short circuits, improves wettability, and increases the energy density of the battery cell.
Implementation Method 1
a part of the first electrode piece can be affixed to the adapter by its own tension to ensure electrical connection between the first electrode piece and the adapter
Implementation Method 2
increasing the contact area between the first electrode piece and the adapter and increasing the current passing capacity
Data Source
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AI summary
Embodiments of the application provide a battery cell (7), a manufacturing method and a manufacturing system therefor, a battery and an electric device. According to the embodiments of the application, the battery cell (7) includes: an electrode assembly (10) including a first electrode piece (11); a housing (20), configured to accommodate the electrode assembly (10) and including an electrode lead-out portion; an adapter (40), configured to electrically connect the electrode lead-out portion and the first electrode piece (11). The first electrode piece (11) is configured such that the first electrode piece (11) is at least partially wound around the adapter (40) and affixed to the adapter (40). The first electrode piece (11) is wound around the adapter (40), such that a part of the first electrode piece (11) can be affixed to the adapter (40) by its own tension to ensure electrical connection between the first electrode piece (11) and the adapter (40). In this case, the first electrode piece (11) does not need to be connected to the adapter (40) by a welding process, thereby reducing metallic particles generated during production of the battery cell (7) and reducing the risk of short circuit. A part, affixed to the adapter (40), of the first electrode piece (11) is in surface contact with the adapter (40), thereby increasing the contact area between the first electrode piece (11) and the adapter (40) and increasing the current passing capacity.