Battery Module Movable Bracket for Cell Swelling Management
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Solution Overview
Problem
In existing battery designs, cell swelling can lead to displacement of the cell housing, compromising safety and functionality.
Innovation Solution
A battery module design where the cell is allowed to move relative to the housing, with a movable bracket system that reduces friction and provides a swelling space, enhancing protection and safety by allowing for pressure relief and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the cell housing is fixed within the battery housing, then the structural stability is improved, but the cell swelling causes displacement and damage to the body portion
Solution Approach 1:
The patent transforms the fixed cell housing structure into a dynamic movable structure. The bracket is designed to slide along the bottom wall within a predetermined range, allowing the cell housing to move dynamically when swelling occurs, preventing damage while maintaining structural integrity.
Solution Approach 2:
The bracket serves as an intermediary component between the cell housing and the battery housing. It absorbs the swelling displacement through its sliding mechanism, protecting the body portion from direct damage while maintaining the connection between the cell housing and battery housing.
2Manufacturing precision
If the cell housing is fixed to prevent displacement, then the positioning accuracy is improved, but the friction during swelling causes damage to the body portion
Solution Approach 1:
The bracket is designed with a sliding mechanism that allows controlled movement along the bottom wall. This dynamic structure reduces friction during cell swelling compared to a fixed connection, preventing damage to the body portion while maintaining positioning within a predetermined range.
3Reliability
If the cell is allowed to move relative to the housing, then the safety is improved by accommodating swelling, but the structural stability deteriorates
Solution Approach 1:
The patent implements a controlled dynamic system where the bracket slides within a predetermined range along the bottom wall. This allows the cell housing to move when swelling occurs, improving safety, while the guided sliding mechanism maintains structural stability by preventing uncontrolled displacement.
Solution Approach 2:
The bracket is pre-configured with a sliding mechanism that anticipates swelling displacement. The predetermined sliding range is designed in advance to accommodate expected swelling, allowing the structure to adapt safely without compromising overall stability.
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
The design mitigates damage risks to the battery module by facilitating movement of the cell, reducing friction, and providing a swelling space to manage pressure, thereby improving safety and extending the service life.
Implementation Method 1
the first portion can reduce friction between the body portion and the bottom wall during movement, facilitating movement
Data Source
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AI summary
This application discloses a battery module and an electric device. The battery module includes a plurality of cell units arranged along a first direction and a housing. Each cell unit includes a cell and a bracket. The cell includes an electrode assembly, a cell housing, and an electrode terminal connected to the electrode assembly and led out of the cell housing. The cell housing includes a body portion. The body portion includes a first wall and a second wall arranged along a second direction. The electrode assembly is disposed in the body portion. The bracket includes a first portion. The first portion covers at least a part of the first wall. The housing includes a bottom wall. The first portion is connected to the bottom wall. The bottom wall, the first portion, and the cell unit are arranged along the second direction, and along the first direction, the first portion is configured to be movable relative to the bottom wall. When the cell swells, the body portion is capable of moving relative to the bottom wall through the first portion, facilitating movement, protecting the body portion, and reducing the risk of affecting the use of the battery module due to damage to the body portion.