Insulated Aluminum Battery Case Stamping Without Film Damage
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Solution Overview
Problem
Batteries using aluminum cases are prone to short circuits due to metal dust generation and damage to insulating films, posing safety risks and increasing production costs.
Innovation Solution
An aluminum case with insulating layers on its inner and/or outer surfaces, manufactured by attaching an insulating layer with an adhesive that allows relative movement during stamping, followed by curing to ensure adhesion, reducing metal dust and eliminating the need for additional insulating films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an insulating film is applied to the negative cell to prevent short circuit, then short circuit prevention is improved, but the insulating film may be damaged during use leading to safety risks
Solution Approach 1:
The insulating layer is applied to the aluminum case before the negative cell is installed, creating a pre-established protective barrier that eliminates the need for post-assembly film application and ensures continuous protection throughout the battery lifecycle
Solution Approach 2:
The insulating layer acts as an intermediary between the aluminum case and the negative cell, providing electrical isolation without requiring a separate insulating film on the negative cell, thus eliminating the film damage issue while maintaining short circuit prevention
2Ease of manufacture
If metal dust is generated during aluminum plate processing, then manufacturing is simplified, but metal dust causes short circuit and safety accidents
Solution Approach 1:
The stamping process that generates metal dust is converted into a beneficial cleaning mechanism where the relative movement between insulating layer and aluminum case surface causes metal dust to detach from the aluminum case and become embedded in the insulating layer, transforming a harmful contaminant into a trapped, harmless element
Solution Approach 2:
The insulating layer serves as an intermediary that captures and isolates metal dust particles generated during processing, preventing them from causing short circuits while allowing the stamping process to proceed without additional dust collection equipment
3Strength
If the insulating layer is fixed before stamping, then the insulating layer is securely attached, but the insulating layer cannot accommodate deformation during molding
Solution Approach 1:
The adhesive layer transitions from an uncured flexible state during stamping that allows insulating layer movement and deformation accommodation, to a cured rigid state afterward that provides strong attachment, creating a dynamic system that adapts to different process requirements
Solution Approach 2:
The insulating layer is attached to the aluminum case before the final assembly, allowing it to be positioned and deformed during stamping while the adhesive remains uncured, ensuring proper fit before the adhesive sets to secure the final configuration
4Reliability
If additional insulating films are applied to the negative cell, then short circuit prevention is improved, but production cost and process complexity increase
Solution Approach 1:
The insulating function is merged into the aluminum case structure itself through the insulating layer, eliminating the need for separate insulating films on the negative cell and simplifying the overall battery assembly process while maintaining equivalent or superior protection
Solution Approach 2:
The insulating layer on the aluminum case serves multiple functions: providing electrical isolation to prevent short circuits, capturing metal dust during processing, and eliminating the need for additional insulating components, thereby reducing overall system 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
Enhances battery safety by preventing short circuits and simplifies manufacturing and assembly processes while reducing costs.
Implementation Method 1
attaching an insulating layer to at least one surface of the plate body with an adhesive layer, wherein the adhesive layer is disposed between the insulating layer and the plate body
Implementation Method 2
curing the adhesive layer after the stamping of the plate body is completed so that the insulating layer is fixed to the plate body
Data Source
AI summary
A method for manufacturing an aluminum case of a battery includes: attaching an insulating layer to at least one surface of the plate body with an adhesive layer, wherein the adhesive layer is disposed between the insulating layer and the plate body; stamping, before the adhesive layer is cured, the plate body coated with the insulating layer to form the aluminum case in a predetermined shape, wherein during the stamping of the plate body, the insulating layer is movable relative to the plate body since the adhesive layer is not cured; and curing the adhesive layer after the stamping of the plate body is completed so that the insulating layer is fixed to the plate body, thereby avoiding detachment of the insulating layer and the plate body on the aluminum case.