Battery Cell Adapter Layout to Prevent Internal Short Circuits
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The reliability of battery cells, particularly in electric vehicles, is compromised by the risk of internal short circuits and inefficient space utilization, which affects energy density and performance.
Innovation Solution
The battery cell design includes a shell with a first adapter and a second adapter arranged to avoid overlapping projections, utilizing a height difference and specific surface areas to ensure stable electrical connections while minimizing the risk of short circuits, and incorporating an insulating member to isolate adapters, thereby enhancing reliability and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first adapter and second adapter are arranged to avoid overlapping projections, then the risk of internal short circuit is reduced, but the device complexity increases
Solution Approach 1:
The patent resolves the contradiction by transitioning from a two-dimensional planar arrangement to a three-dimensional spatial arrangement. The first adapter and second adapter are positioned at different heights in the thickness direction of the first wall, creating non-overlapping orthographic projections. This vertical dimensionality change allows both adapters to coexist without overlapping when viewed from the thickness direction, thereby preventing internal short circuits while maintaining a compact structure.
Solution Approach 2:
The patent applies the nesting principle by having the first adapter and second adapter nested in the thickness direction of the first wall. The adapters are arranged at different vertical levels, with one adapter positioned above the other in the thickness direction. This nested arrangement allows both adapters to occupy the same lateral space without overlapping projections, reducing the risk of short circuits while minimizing the overall device footprint.
2Volume of moving object
If the first tab and second tab are arranged at one end of the main body part, then the space utilization is improved, but the risk of short circuit between tabs increases
Solution Approach 1:
The patent resolves this contradiction by utilizing the thickness direction as an additional dimension for adapter placement. While the first tab and second tab are positioned at the same end of the main body part to maximize space utilization, their connecting adapters are arranged at different heights in the thickness direction. This vertical separation ensures that the orthographic projections of the adapters do not overlap, preventing short circuits between the tabs while maintaining compact lateral dimensions.
Solution Approach 2:
The patent introduces the first adapter and second adapter as intermediary components between the tabs and the first wall. These adapters serve as mediators that electrically connect the tabs to the first wall while providing spatial separation. By positioning the adapters at different heights in the thickness direction, the intermediaries prevent direct contact or overlapping projections between the connection paths of the first tab and second tab, thereby eliminating short circuit risks while allowing the tabs to be arranged close together.
Data Source
AI summary
The present application discloses a battery cell, a battery, and an electrical apparatus. The battery cell includes a shell with a first wall, an electrode terminal mounted on the first wall in an insulated manner, an electrode assembly with a main body, a first tab, and a second tab of opposite polarity. Both tabs are located at one end of the main body facing the first wall. A first adapter includes a first connecting portion attached to the first wall and a second connecting portion connected to the first tab. A second adapter connects the electrode terminal to the second tab. In the thickness direction of the first wall, the orthographic projections of the first and second adapters do not overlap, nor do those of the first connecting portion and the second tab. This structure enhances battery reliability by optimizing internal electrical connection layout.