Battery Cell Binding Structure for Horizontal Swelling Control
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Solution Overview
Problem
The challenge of lithium-ion batteries is the gradual increase in expansion force due to structural changes during charge and discharge cycles, leading to excessive deformation and potential failure, particularly affecting the performance and integrity of battery cells with large side walls when placed horizontally.
Innovation Solution
A battery design that accommodates battery cells horizontally with a binding component featuring a reinforcing portion parallel to the largest outer walls, enhancing the binding force without thickening the component, thereby reducing expansion and deformation, and ensuring the battery's performance and energy density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the binding component is thickened as a whole to enhance binding strength, then the binding force to battery cells is improved, but the energy density of the battery is reduced
Solution Approach 1:
The binding component incorporates reinforcing portions at specific locations (such as at intervals along the binding component or at corners) rather than uniformly thickening the entire component. This localized reinforcement approach provides enhanced binding strength where needed while minimizing the overall material usage and maintaining energy density.
2Stability of the object's composition
If the binding force to battery cells is enhanced, then the expansion and deformation of battery cells is reduced, but the structural complexity of the binding component increases
Solution Approach 1:
The binding component is designed with discrete reinforcing portions distributed at specific intervals or locations along its length, rather than as a continuous complex structure. This segmentation allows the component to maintain simplicity while providing targeted reinforcement where expansion forces are greatest.
3Strength
If the binding component accommodates horizontal placement of battery cells, then the binding force to large side walls is improved, but the expansion space of battery cells is reduced
Solution Approach 1:
Reinforcing portions are positioned at specific locations such as corners or at intervals along the binding component, providing localized reinforcement to the large side walls of horizontally placed battery cells. This approach enhances binding force where structurally necessary while leaving the central regions open to accommodate battery cell expansion.
Data Source
AI summary
Provided are battery, electric device, method for manufacturing battery, and device for manufacturing battery. The battery includes: multiple battery cells, wherein a wall with the largest area among outer walls of each battery cell is provided parallel to horizontal plane; and a binding component, accommodating and binding the multiple battery cells, wherein a reinforcing portion is provided at part of the binding component parallel to the wall with the largest area, and the reinforcing portion reinforces the strength of the binding component, to enhance binding force of the binding component to the multiple battery cells. The binding force to the walls with the largest area among outer walls of the battery cells is enhanced, too much expansion and deformation of the battery cells is avoided, and the failure probability of the battery caused by extrusion to other structural parts of the battery after the battery cells expand is reduced.