Electrode Assembly Connection Layer for Bend-Induced Short Circuit Prevention
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Solution Overview
Problem
Batteries face safety issues due to short circuits caused by dislocation and bifurcation of inactive substance portions during bending, leading to potential contact between electrode plates.
Innovation Solution
An electrode assembly with a connection layer spaced from the active substance portion, connecting adjacent inactive substance portions to constrain and prevent dislocation, reducing short circuit risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inactive substance portions are made protruding and stacked to improve electrical connection, then electrical conductivity is improved, but dislocation and bifurcation occur during bending causing short circuit risks
Solution Approach 1:
The patent applies preliminary action by pre-connecting inactive substance portions with connection layers before the bending process occurs. The connection layers are disposed between adjacent inactive substance portions in advance, creating constraints that prevent dislocation and bifurcation during subsequent bending operations, thereby eliminating short circuit risks while maintaining electrical connectivity.
2Stability of the object's composition
If connection layer is placed close to active substance portion to secure inactive substance portions, then structural stability is improved, but active substance fall-off risk increases due to deformation
Solution Approach 1:
The patent applies local quality by creating different spatial zones with distinct functions: the connection layer is positioned in a specific local region that is spaced from the active substance portion, while still effectively connecting inactive substance portions. This localized positioning ensures structural stability where needed (at the inactive substance portions) while avoiding the active substance portion area, preventing deformation-induced fall-off.
3Manufacturing precision
If multiple connection layers are used to evenly connect inactive substance portions, then connection uniformity is improved, but device complexity increases
Solution Approach 1:
The patent applies partial action by using a sufficient number of connection layers to achieve the required connection uniformity and constraint effect, without unnecessarily increasing the number of layers. The connection layers are disposed between adjacent inactive substance portions at strategic locations, providing just enough constraint to prevent dislocation and bifurcation during bending, while avoiding excessive complexity.
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 connection layer effectively reduces short circuit risks by maintaining the integrity of inactive substance portions, enhancing safety performance and insulation.
Implementation Method 1
The connection layer is colloid and is bonded to surfaces of the first inactive substance portions
Data Source
AI summary
This application discloses an electrode assembly, a battery cell, a battery, and an electric device. The electrode assembly may include a first electrode plate and a second electrode plate that have opposite polarities, where the first electrode plate and the second electrode plate may be stacked. The first electrode plate may include a first active substance portion and a plurality of first inactive substance portions protruding from the first active substance portion, and the plurality of first inactive substance portions may be stacked. A connection layer may be disposed between at least two adjacent first inactive substance portions, and the connection layer may be spaced from the first active substance portion in a first direction and connect two adjacent first inactive substance portions, where the first direction is a direction in which the first inactive substance portions protrude from the first active substance portion.