Battery Pole Assembly With Chemical Bonding for Hermetic Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Secondary batteries experience sealing failure or sealing performance deterioration due to the shifting or falling off of the insulation member, which compromises safety.
Innovation Solution
A secondary battery design featuring a top cover plate, a pole with stacked metal layers, and an insulation member bonded by chemical bonding layers, which enhances connection strength and reduces the likelihood of sealing failure by limiting the pole's axial movement and preventing electrolyte leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the insulation member is simply placed between the top cover plate and the pole, then the device complexity is low, but the sealing reliability deteriorates due to shifting or falling off
Solution Approach 1:
A bonding layer is introduced as an intermediary between the insulation member and the pole. This bonding layer chemically bonds to both the insulation member and the pole surface, creating a reliable connection that prevents the insulation member from shifting or falling off, while keeping the overall structure relatively simple
Solution Approach 2:
The connection structure uses composite materials approach by combining the insulation member with a bonding layer that has different chemical properties. The bonding layer is designed to chemically bond with both the insulation member material and the pole surface, creating a multi-material composite structure that achieves reliable sealing
2Reliability
If the insulation member is hermetically connected through chemical bonding, then the sealing reliability improves, but the manufacturing complexity increases
Solution Approach 1:
The bonding layer serves as a chemical intermediary that facilitates hermetic connection between the insulation member and the pole. It provides chemical bonding groups that react with both surfaces, achieving reliable sealing while maintaining ease of manufacture through a straightforward assembly process
Solution Approach 2:
The bonding layer undergoes parameter changes through chemical reactions during assembly. It transforms from a separate component to a chemically bonded interface, achieving hermetic sealing. The process parameters (such as bonding conditions) are optimized to balance sealing reliability with manufacturing simplicity
3Reliability
If the pole is allowed to move axially, then the ease of assembly improves, but the sealing reliability deteriorates due to potential displacement
Solution Approach 1:
The bonding layer acts as a mediator that provides both mechanical support and chemical bonding. It allows for easy assembly during manufacturing while preventing axial displacement during operation, achieving both ease of assembly and sealing reliability through its dual-function 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 design improves the connection strength between the metal layers and the insulation member, reducing the risk of sealing failure and enhancing the safety of the secondary battery by ensuring a tight and reliable seal.
Implementation Method 1
the first metal layer and the first bonding layer are bonded by a chemical bond, the insulation member and the first bonding layer are bonded by a chemical bond
Implementation Method 2
the second metal layer and the second bonding layer are bonded by a chemical bond, the insulation member and the second bonding layer are bonded by a chemical bond
Data Source
AI summary
This application relates to a secondary battery, a battery column, and an apparatus. The secondary battery includes a top cover plate, having an outer surface and an inner surface disposed opposite each other in a thickness direction of the top cover plate and an electrode lead-out hole extending along the thickness direction; a pole, disposed in the electrode lead-out hole, where the pole includes a first metal layer and a second metal layer, and the first metal layer and the second metal layer are stacked along a direction from the inner surface to the outer surface; an insulation member, disposed between the top cover plate and the pole; and a first bonding layer, disposed between the insulation member and the first metal layer, where the insulation member is hermetically connected to the first metal layer through the first bonding layer.