Electrode Assembly Guiding Sections for Accurate Battery Stacking
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Solution Overview
Problem
The issue of electrode plates deviating from predetermined positions during stacking in secondary batteries affects the electrochemical performance and safety, particularly due to lithium plating phenomena caused by misalignment and improper folding of anode and cathode electrode plates.
Innovation Solution
Incorporating guiding portions in the bending sections of electrode plates to facilitate precise bending and alignment, ensuring that electrode plates are accurately positioned during the stacking process, thereby reducing the likelihood of lithium plating and improving electrochemical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electrode plates are stacked without guiding portions, then the stacking process is simpler, but the electrode plates deviate from predetermined positions affecting electrochemical performance
Solution Approach 1:
Guiding portions are pre-formed on the electrode plates before stacking, establishing predetermined bending paths and positions in advance. This preliminary structuring ensures accurate positioning during stacking without requiring complex real-time alignment mechanisms, thus improving manufacturing precision while maintaining relatively simple device structure.
Solution Approach 2:
The guiding portions act as intermediary elements between the electrode plate body and the stacking process. These guiding portions facilitate controlled bending and positioning by providing a predetermined path, mediating the interaction between the electrode plate and stacking equipment to achieve accurate positioning without direct complex control mechanisms.
2Reliability
If electrode plates are bent without guiding portions, then the bending process is faster, but lithium plating occurs due to misalignment
Solution Approach 1:
The guiding portions are pre-formed on the electrode plates to establish predetermined bending paths. This preliminary preparation ensures that during high-speed stacking, the plates automatically follow the correct path, maintaining alignment accuracy and preventing lithium plating while enabling faster processing speeds.
Solution Approach 2:
The guiding portions enable the electrode plates to self-guide during the bending and stacking process. The predetermined structures on the plates themselves provide the alignment function, eliminating the need for complex external guiding mechanisms and allowing rapid processing while maintaining reliability through self-alignment.
Data Source
AI summary
The disclosure relates to an electrode assembly and its forming method and a manufacturing system, a secondary battery, a battery module and a device. The electrode assembly includes: a first electrode plate including a plurality of bending sections and a plurality of stacked first stacking sections, each bending section being configured to connect two adjacent first stacking sections, herein the bending section includes a guiding portion for guiding the bending section to be bent during production; and a second electrode plate with a polarity opposite to that of the first electrode plate, the second electrode plate including a plurality of second stacking sections, and each second stacking section being disposed between two adjacent first stacking sections.