Battery Cell Adapting Sheet Layout for Larger Fast-Charge Tabs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The limited dimension of the tab in battery cells constrains the fast-charging performance due to its positioning between the pole and the explosion-proof valve, reducing the available space for the cell body and thus the battery capacity.
Innovation Solution
An adapting sheet with a pole connection portion, a tab connection portion, and a bending portion is designed, allowing the tab connection portion to be positioned closer to the end cover plate, increasing the tab's dimension and creating space for a larger cell body, while a fusing portion with a thinned region or fusing hole is included for overcurrent protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tab is positioned between the pole and the explosion-proof valve, then the adapting sheet can connect both components, but the tab dimension is limited and fast-charging performance is reduced
Solution Approach 1:
The patent introduces a bending portion that extends in the height direction (second direction), transforming the tab connection from a purely planar arrangement to a three-dimensional configuration. This allows the tab connection portion to be positioned closer to the end cover plate, increasing the tab dimension in the length direction without compromising the connection function between the pole and explosion-proof valve.
2Productivity
If the tab dimension is increased to improve fast-charging performance, then the available space for the cell body is reduced
Solution Approach 1:
By utilizing the height direction (second direction) through the bending portion, the patent increases the tab dimension without encroaching on the cell body space in the length direction. The three-dimensional configuration allows the tab connection portion to be positioned closer to the end cover plate, effectively decoupling the tab dimension from the cell body accommodation space.
3Ease of manufacture
If the adapting sheet structure is simplified, then manufacturing is easier, but overcurrent protection capability is reduced
Solution Approach 1:
The patent applies local quality by creating a thinned region or fusing hole at a specific location (the fusing portion) on the adapting sheet. This localized modification provides overcurrent protection capability without requiring complex structural changes to the entire adapting sheet, maintaining ease of manufacture while enhancing safety functionality.
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 enhances fast-charging performance by increasing the tab's dimension and improving battery capacity, while also providing compact overcurrent protection without compromising structural strength.
Implementation Method 1
a fusing portion is disposed between the pole connection portion and the tab connection portion and is configured to be fused during overcurrent of the adapting sheet
Data Source
AI summary
The present application provides an adapting sheet, a battery cell, a battery, and an electric apparatus. The adapting sheet includes a pole connection portion, a tab connection portion, and a bending portion. In a first direction, two sides of the pole connection portion are respectively connected to the tab connection portion through the bending portion. In a second direction, a height difference is formed between the pole connection portion and the tab connection portion, and the first direction is non-parallel to the second direction. The adapting sheet in the present disclosure is applied in the battery cell, so that the tab may be disposed at both sides of the pole in a width direction of the cell.