Battery Cell Support Frame With Liquid Retention for Leak Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Battery cells leak electrolytic solution when used inverted, posing a significant safety hazard due to stress on the electrode assembly and weak points in the connection between the electrode terminal and the end cover.
Innovation Solution
A battery cell design featuring a support frame between the wall part and the electrode assembly main body, with liquid retaining layers to absorb and store electrolytic solution, reducing leakage by supporting the assembly and optimizing space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the battery cell is used inverted with the electrode terminal facing downwards, then the assembly structure is simplified, but the electrolytic solution leaks due to stress on the electrode assembly and weak connection points
Solution Approach 1:
The support frame is positioned between the electrode assembly main body and the end cover before assembly, providing structural reinforcement and stress distribution. The liquid retaining layer is pre-installed on the support frame to absorb and retain electrolytic solution, preventing leakage before it can occur during inverted use or impact events.
Solution Approach 2:
The support frame acts as an intermediary structural element between the electrode assembly and the end cover, distributing mechanical stress and preventing direct contact that would cause damage. The liquid retaining layer serves as an intermediary barrier that absorbs electrolytic solution, preventing it from reaching weak connection points and causing leakage.
2Reliability
If the liquid retaining layer is provided between the wall part and the support frame, then the electrolytic solution absorption capacity is improved, but the internal space of the battery cell is reduced
Solution Approach 1:
The liquid retaining layer is strategically positioned only in specific regions where electrolytic solution accumulation is most likely to occur, such as between the wall part and support frame. This localized approach provides effective solution retention while minimizing the overall space occupied, compared to a universal retention system throughout the battery cell.
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 effectively reduces electrolytic solution outflow during impact, enhancing safety and performance by improving wetting effects and assembly efficiency.
Implementation Method 1
the at least one liquid retaining layer is configured to absorb and store the electrolytic solution in the shell
Implementation Method 2
the support frame is configured to support the main body; the support frame to alleviate the situation where local stress occurs on the main body of the electrode assembly
Data Source
AI summary
A battery cell, a battery, and an electric device. The battery cell includes a shell, electrode terminals, at least one electrode assembly, a support frame and liquid retaining layer(s). The shell has a wall part, and the electrode terminals are provided at the wall part. The electrode assembly is accommodated in the shell. The electrode assembly has a main body and tabs. In the thickness direction of the wall part, the tabs protrude from an end of the main body facing the wall part and connected to the electrode terminals. In the thickness direction of the wall part, the support frame is provided between the wall part and the main body. The support frame is configured to support the main body. The liquid retaining layer(s) are provided at the support frame, and the liquid retaining layer(s) are configured to absorb and store the electrolytic solution in the shell.