Battery Cell Binding Layout for Balanced Internal Stress
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The service life of battery cells is limited due to inconsistent internal stress distribution as the number of charge and discharge cycles increases, leading to reduced energy storage and stability issues.
Innovation Solution
A battery cell design with asymmetrically arranged binding members between the electrode assembly and casing, where the minimum distance between the binding member and one end is smaller than to the other, balances internal stress by deviating the binding force distribution from the middle section face, enhancing stress consistency and reducing expansion-related damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If binding members are symmetrically arranged on the electrode assembly, then the structure is simple and easy to manufacture, but the internal stress distribution becomes inconsistent during charge and discharge cycles
Solution Approach 1:
The patent applies asymmetry by positioning binding members at different distances from the first end and second end of the electrode assembly. Specifically, the distance from the first binding member to the first end is different from the distance from the first binding member to the second end, creating an asymmetric stress distribution that compensates for the natural stress variations during battery cycling, thereby achieving more consistent overall stress distribution.
Solution Approach 2:
The patent applies local quality by making different regions of the electrode assembly have different binding characteristics. The binding members are positioned at specific locations with different distances from the ends, creating localized stress adjustments in different regions of the electrode assembly to achieve uniform overall stress distribution.
2Reliability
If the electrode assembly expands during charge and discharge cycles, then the battery maintains good electrical performance, but the internal stress difference increases leading to reduced service life
Solution Approach 1:
The patent applies preliminary anti-action by pre-positioning binding members at asymmetric locations that anticipate and counteract the stress distribution patterns that occur during battery expansion and contraction. The asymmetric positioning creates opposing stresses that balance the natural stress variations, preventing damage before it occurs and extending service life while maintaining electrical performance.
Data Source
AI summary
A battery cell, a battery and an electricity-consuming apparatus are provided by the present application. The battery cell includes a casing, an electrode assembly and at least one binding member. The electrode assembly is arranged in the casing. The electrode assembly includes a main body. The main body includes a first end and a second end arranged opposite to each other in an axial direction of the electrode assembly. At least one binding member is arranged between a peripheral side face of the main body and the casing. The at least one binding member includes a first binding member. The minimum distance between the first binding member and the first end is smaller than the minimum distance between the first binding member and the second end.