Multi-Tab Battery Conductive Plate Angle to Prevent Short Circuits
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Solution Overview
Problem
Batteries with multi-tab structures face issues of conductive plates coming into contact with edges or being inverted during installation, leading to potential short circuits and safety risks due to the bending and welding of tabs, which increases internal resistance and affects high-rate charge and discharge performance.
Innovation Solution
A battery design featuring an electrode assembly with a conductive plate having a specific angle greater than or equal to 60° and less than 90°, along with insulating materials and strategically positioned tabs, reduces the risk of contact with edges and inversion by maintaining appropriate distances and angles, thereby minimizing the risk of short circuits and improving safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If tabs are bent and welded to reduce space occupied by tabs inside the battery cell, then the space occupied by tabs is reduced, but the conductive plate is likely to come into contact with the edges of the battery cell or be inverted and inserted into the battery cell under thrust
Solution Approach 1:
The conductive plate is pre-configured with a specific included angle (≥60° and <90°) between its segments before installation. This preliminary geometric configuration ensures that during subsequent installation and under operational thrust, the conductive plate follows a controlled trajectory that prevents contact with cell edges or inversion into the battery cell, thereby resolving the reliability issue while maintaining space efficiency
Solution Approach 2:
The patent specifies a particular parameter range for the included angle of the conductive plate (≥60° and <90°). By changing this geometric parameter from conventional designs, the conductive plate achieves optimal orientation control during installation and operation, preventing harmful contact or inversion while maintaining the space-reduced multi-tab structure
2Reliability
If the included angle of the conductive plate is set to reduce contact risk, then the risk of short circuit is reduced, but the design complexity increases
Solution Approach 1:
The patent introduces a specific parameter constraint (included angle ≥60° and <90°) for the conductive plate geometry. This parameter change directly addresses the short circuit risk by controlling the plate's orientation and trajectory during installation and operation. The solution adds minimal design complexity by focusing on a single geometric parameter rather than requiring complex mechanical constraints or additional components
Data Source
AI summary
A battery includes an electrode assembly, a housing, a plurality of first tabs, and a first conductive plate. The electrode assembly includes a first conductive layer, a second conductive layer, and a first layer arranged between the first conductive layer and the second conductive layer. The plurality of first tabs are arranged on one side of the first conductive layer and bent within the housing to form a first tab group. The first conductive plate includes a first segment connected to the first tab group and a second segment connected to the first segment, where the second segment at least partially extends out of the housing and extends in a first direction, and an included angle θ is formed between the first segment and the second segment, the included angle θ is greater than or equal to 60° and less than 90°.