Power Storage Device Thinning via Integrated Electrode Bonding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional power storage devices are not thin enough to meet the demands of increasingly thinner electronic equipment, as they require spacers to adjust gaps between the electrode assembly and the case, which complicates design and increases the risk of short circuits.
Innovation Solution
A power storage device design where the electrode body, with integrated positive and negative electrodes and a separator, is directly bonded to the case using a bonding layer that contains the same resin as the electrodes, eliminating the need for spacers and enhancing stability, and featuring tapes that integrate the electrodes and separators to form a recessed portion for the bonding layer, reducing thickness and preventing displacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If spacers are provided to adjust the gap between the electrode assembly and the case, then the electrode assembly is properly positioned, but the device thickness increases and the structure becomes more complex
Solution Approach 1:
The patent merges the positioning function with the electrode assembly structure itself by providing protrusions on the electrode assembly that directly engage with recesses in the case. This integration eliminates the need for separate spacer components, achieving precise gap adjustment while reducing overall device thickness.
Solution Approach 2:
The patent extracts the spacer component from the system and replaces it with integrated positioning structures (protrusions and recesses) formed directly on the electrode assembly and case. This removal of unnecessary components simplifies the structure and reduces thickness while maintaining positioning precision.
2Stability of the object's composition
If multiple spacers are provided on both sides of the electrode assembly, then the electrode assembly is securely positioned, but the device complexity increases
Solution Approach 1:
The patent combines multiple positioning functions into integrated protrusion and recess structures that are formed as part of the electrode assembly and case themselves. This merging of functions reduces the number of discrete components while maintaining secure positioning stability.
Solution Approach 2:
The protrusions and recesses serve multiple functions simultaneously: they position the electrode assembly, maintain the gap distance, and provide structural support. This multi-functionality reduces the need for separate dedicated positioning components, simplifying the overall device structure.
3Length of stationary object
If spacers are used to maintain the gap between the electrode assembly and case, then proper spacing is achieved, but the risk of short circuits increases
Solution Approach 1:
The patent removes the spacer component entirely and replaces it with integrated positioning structures. This elimination of separate spacer components reduces the number of interfaces and potential failure points, thereby lowering the risk of short circuits while maintaining the necessary gap distance.
Solution Approach 2:
By merging the spacing function into the electrode assembly and case structures themselves, the patent creates a more integrated and reliable system with fewer discrete components that could potentially fail or cause short circuits.
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 allows for a thinner power storage device with reduced risk of short circuits and improved bonding strength, as the electrode body is securely fixed to the case, and the bonding layer's stability to the electrolyte ensures minimal reaction, maintaining device integrity.
Implementation Method 1
the electrode body and the inner surface of the case be bonded with a bonding layer
Data Source
AI summary
A power storage device includes a case, an electrode body, and an electrolyte. The electrode body is located in the case and has a positive electrode, a negative electrode, and a separator located between the positive and negative electrodes. The electrolytefills the case 2. A principal surface of the electrode body is connected to an inner surface of the case.