Battery Cell Lid Connection That Eliminates Intermediate Contacts
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Solution Overview
Problem
Existing battery cell designs are complex and heavy due to the need for multiple connection points and intermediate contact means, which complicates the manufacturing process and increases weight.
Innovation Solution
The battery cell design incorporates a lid directly connected to one or both current collectors of the electrode stack, eliminating the need for intermediate contact means by using deepenings on the lid for secure welding, thereby reducing complexity and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If intermediate contact means are used to connect terminal tabs to cell contacts, then secure electrical connection is achieved, but device complexity and weight increase
Solution Approach 1:
The lid is merged with the cell contact function, directly integrating the connection function into the lid structure. The lid serves both as a sealing component and as the cell contact, eliminating the need for separate intermediate contact means. This merging reduces the number of components while maintaining reliable electrical connection between the terminal tabs and the cell contact.
Solution Approach 2:
The lid is designed to perform multiple functions: it provides sealing for the cell, serves as a structural component, and acts as the cell contact for electrical connection. This multi-functionality eliminates the need for dedicated intermediate contact components, reducing overall device complexity while ensuring reliable electrical connection.
2Reliability
If multiple intermediate contact means are used, then secure electrical connection is achieved, but weight increases
Solution Approach 1:
By merging the lid with the cell contact function, the patent eliminates multiple separate contact components that would add weight. The lid itself serves as the contact means, reducing the total material required for connection components while maintaining secure electrical connection reliability.
3Reliability
If traditional connection methods with multiple components are used, then secure electrical connection is achieved, but manufacturing complexity increases
Solution Approach 1:
The integration of the lid with the cell contact function reduces the number of assembly steps. Instead of separately installing intermediate contact means and then connecting terminal tabs, the lid is installed as a single component that simultaneously provides sealing and electrical connection, simplifying the manufacturing process while ensuring reliable connection.
Solution Approach 2:
The lid is pre-configured with the cell contact function, so that when the lid is installed on the cell, the electrical connection is automatically established. This preliminary integration of functions reduces the number of subsequent assembly operations required during manufacturing.
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 design results in a lighter, less complex battery cell with improved manufacturing efficiency, as the direct connection of the lid to the current collectors simplifies the assembly process and reduces material usage.
Implementation Method 1
The terminal tabs of the electrode assembly are connected to the connection means through methods such as welding or crimping
Data Source
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AI summary
A first aspect of the present disclosure is related to a battery cell, comprising: - an electrode stack with two electrode layers, an anode layer and a cathode layer, wherein each electrode layer comprises a current collector; - a can that comprises the electrode stack; - a lid arranged on top of the can and directly connected to one or both current collectors of the electrode stack.