Conductive Plate Expansion Unit for Battery Pack Swelling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional secondary battery packs experience increased thickness due to swelling during charging, leading to bending and inefficient space usage when batteries are not connected by a conductive plate.
Innovation Solution
A conductive plate with an expansion unit, featuring notching, wrinkled, or zigzag designs, that increases in length in response to external forces, maintaining the parallel alignment of batteries and preventing thickness changes during swelling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If batteries are connected by a rigid conductive plate, then electrical connection is achieved, but the battery pack bends and thickness increases due to swelling during charging
Solution Approach 1:
The conductive plate transitions from a rigid structure to a dynamic structure with expansion units that can change length. The expansion units include notching units, wrinkled shapes, or zigzag patterns that allow the plate to expand and contract dynamically in response to battery swelling during charging, preventing bending while maintaining electrical connection
Solution Approach 2:
The conductive plate's length parameter is made variable through the expansion units. The notching units, wrinkled shapes, or zigzag patterns enable the plate to change its length parameter in response to external forces from battery swelling, allowing it to accommodate volume changes without compromising the electrical connection
2Stability of the object's composition
If a rigid conductive plate is used to connect batteries, then structural stability is provided, but space efficiency decreases due to increased thickness from swelling
Solution Approach 1:
The conductive plate incorporates dynamic expansion units that allow the structure to adapt its configuration during charging. The notching units, wrinkled shapes, or zigzag patterns enable the plate to absorb swelling forces through controlled expansion, preventing V-shaped bending and maintaining the battery pack's original thickness and space efficiency
3Ease of manufacture
If the conductive plate length is fixed, then manufacturing simplicity is maintained, but adaptability to swelling decreases
Solution Approach 1:
The conductive plate is segmented into fixed welding portions and variable expansion units. The expansion units are divided into discrete elements (notching units, wrinkled shapes, or zigzag patterns) that can independently expand or contract, providing adaptability to swelling while maintaining relative manufacturing simplicity through modular construction
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 conductive plate effectively prevents the battery pack from bending and maintaining its original thickness by accommodating swelling through expansion units, ensuring consistent space occupation.
Implementation Method 1
an expansion unit whose length is increased with respect to the welding portion in response to an external force being applied
Data Source
AI summary
A conductive plate connects the electrode terminals between batteries of a battery pack and prevents a change in thickness of the battery pack due to swelling of a battery during charging by forming an expansion unit in a conductive plate electrically connecting batteries of the battery pack in which at least two batteries are stacked.