Integrated Battery Cell Frame for Electrode Assembly Protection
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Solution Overview
Problem
Current battery cells have a low reliability during assembly and use due to potential damage of the electrode assembly during installation and operation, which affects their safety and efficiency.
Innovation Solution
A protective frame with integrated segments of protective plates is provided around the electrode assembly to safeguard its side faces, improving rigidity and facilitating assembly while minimizing space occupation, thus enhancing reliability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrode assembly is directly installed into the case without protection, then the assembly process is simple, but the electrode assembly may be damaged during installation or use, reducing reliability
Solution Approach 1:
A protective frame is introduced as an intermediary component between the electrode assembly and the case. The protective frame includes a first protective plate connected to a second protective plate, which is connected to a third protective plate, forming a protective structure that shields the electrode assembly from damage during installation and use without significantly complicating the overall device structure.
2Reliability
If a protective frame is added around the electrode assembly, then the electrode assembly is protected from damage, but the device complexity increases
Solution Approach 1:
The protective frame is segmented into multiple protective plates (first, second, and third protective plates) that are connected together. This segmentation allows the protective structure to be designed and assembled in a modular fashion, providing comprehensive protection while maintaining reasonable structural complexity through systematic division of protective functions.
3Reliability
If the protective frame occupies more space, then better protection is provided, but the energy density of the battery cell is reduced
Solution Approach 1:
The protective frame utilizes thin protective plates that provide effective protection while occupying minimal space. The plates are designed with sufficient thickness to protect the electrode assembly from damage during installation and use, but thin enough to minimize the volume occupied, thereby preserving the energy density of the battery cell.
4Reliability
If the tab is not constricted, then the assembly is simpler, but the tab may be inserted into the main body portion causing active material to fall off
Solution Approach 1:
The protective frame acts as an intermediary structure that constricts the tab in a controlled manner. The frame includes an opening that allows the tab to pass through while providing constriction forces that prevent the tab from being inserted into the main body portion, thereby preventing active material loss without requiring complex additional constriction mechanisms.
Data Source
AI summary
A battery cell includes an electrode assembly including a main body portion and a tab. The tab is connected with a side portion of the main body portion in a first direction. The battery cell further includes a protective frame, which is of an integrated structure and includes three segments of protective plates respectively used for protecting three side faces of the main body portion. The three segments of protective plates comprise a first plate, a second plate, and a third plate. The third plate is located between the first plate and the second plate, two ends of the third plate are respectively connected with a first end of the first plate and a first end of the second plate, and at least one of the first plate, the second plate, and the third plate is provided with an opening. The tab is led out from the opening.