Battery Cell Position-Limiting Structure for Swelling Resistance
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Solution Overview
Problem
Existing battery manufacturing processes are complex, costly, and heavy due to the need for multiple components to manage expansive forces and structural reinforcement, which complicates the assembly and increases weight and production costs.
Innovation Solution
A battery design featuring a box body with a position-limiting member that abuts against the first side wall of battery cells to limit deformation, eliminating the need for end plates and connecting members, thereby simplifying the manufacturing process, reducing weight, and enhancing structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If end plates and connecting members are arranged to fasten battery cells and resist expansive force, then structural strength is improved, but device complexity increases and manufacturing cost increases
Solution Approach 1:
The patent integrates the position-limiting function and the expansive force resistance function into a single position-limiting member. This member simultaneously limits the position of battery cells and resists expansive forces during charging, eliminating the need for separate end plates and connecting members. The merging of functions reduces device complexity while maintaining structural strength.
Solution Approach 2:
The position-limiting member is designed to perform multiple functions: it limits the position of battery cells, resists expansive forces during charging, and provides structural support. This multi-functional design replaces the traditional separate components (end plates, connecting members, reinforcement structures), thereby reducing the number of parts and simplifying the overall structure.
2Strength
If end plates and connecting members are arranged to fasten battery cells, then structural strength is improved, but weight increases
Solution Approach 1:
The patent combines multiple structural components into a single position-limiting member, eliminating redundant parts such as end plates, connecting members, and separate reinforcement structures. This integration reduces the total weight of the battery assembly while maintaining the necessary structural strength through the optimized design of the position-limiting member.
3Strength
If end plates and connecting members are arranged to fasten battery cells, then structural strength is improved, but manufacturing cost increases
Solution Approach 1:
The patent integrates multiple functions into a single position-limiting member, reducing the number of parts that need to be manufactured, stored, and assembled. This simplification of the component list directly reduces manufacturing costs while the optimized design of the position-limiting member ensures that structural strength requirements are met.
Solution Approach 2:
The patent extracts and eliminates unnecessary components from the traditional battery structure, such as end plates and connecting members that are not essential when the position-limiting member is properly designed. This removal of redundant parts simplifies the manufacturing process and reduces production costs.
4Force
If multiple components are arranged to manage expansive force, then resistance to expansive force is improved, but device complexity increases
Solution Approach 1:
The position-limiting member is designed to simultaneously limit cell position and resist expansive forces during charging. By making this single component multi-functional, the patent eliminates the need for separate reinforcement structures and connecting members that would otherwise be required to handle expansive forces, thereby reducing device complexity.
Data Source
AI summary
A battery includes a box body, a battery group, and a position-limiting member. The battery group is arranged in the box body. The battery group includes two or more battery cells arranged in a first direction. The battery cell includes a first side wall and a second side wall connected together. The first side wall is a wall having the largest area among all outer walls of the battery cell. The second side walls of two adjacent battery cells are arranged opposite to each other in the first direction. The position-limiting member is fixedly connected to the box body and abuts against the first side wall of the battery cell. The position-limiting member is used for limiting deformation of the battery cell in a second direction, and the second direction is perpendicular to the first side wall.