Battery Top Cover Assembly With Tapered Pole Sealing Geometry
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing top cover assembly for secondary batteries faces inconvenience in mounting the sealing ring due to its L-shaped cross-section, which occupies space and reduces energy density.
Innovation Solution
A top cover assembly with a sealing hole section and sealing shaft section tilted with respect to the axis of the mounting hole, forming a structure that is small on top and large on bottom, allowing the sealing ring to be compressed and securely seated, along with insulating members to prevent short circuits and ensure reliable sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sealing ring is mounted in a traditional L-shaped configuration, then the sealing performance is maintained, but the top cover plate thickness increases and energy density decreases
Solution Approach 1:
The patent changes the geometric parameters of the mounting hole and sealing shaft section by introducing tilted side walls that converge toward the bottom. This creates a tapered configuration where the opening at the top is larger than the bottom, allowing the sealing ring to be compressed effectively while reducing the overall thickness requirement of the top cover plate.
Solution Approach 2:
The patent applies asymmetry by making the side walls of the mounting hole and sealing shaft section non-parallel, instead tilting them to converge. This asymmetric tapered structure enables the sealing ring to be securely mounted with reduced thickness, as the convergence creates natural compression without requiring additional space.
2Ease of manufacture
If the sealing ring is mounted using a traditional parallel-sided structure, then the mounting process is simple, but the sealing ring may displace or become damaged during assembly
Solution Approach 1:
The patent applies preliminary anti-action by designing the tilted side walls to preemptively prevent displacement and damage of the sealing ring during assembly. The converging geometry creates natural guidance and compression that counteracts any lateral forces or misalignment that might occur during the mounting process, securing the sealing ring in place before final assembly is complete.
3Quantity of substance
If the top cover plate thickness is reduced to increase energy density, then the energy density improves, but the sealing ring cannot be properly compressed and mounted
Solution Approach 1:
The patent solves the thickness constraint by transitioning from a two-dimensional parallel-sided approach to a three-dimensional tapered structure. The tilted side walls create a dimensional change that allows the sealing ring to be compressed and secured within a reduced thickness envelope, enabling both thin design and proper sealing ring mounting.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The present application provides a top cover assembly, a secondary battery and a power consumption apparatus. The top cover assembly includes a top cover plate, a pole, and a sealing ring. The top cover plate is provided with a mounting hole, and the mounting hole includes a sealing hole section. The pole is inserted into the mounting hole, the pole includes a sealing shaft section, the sealing shaft section is inserted into the sealing hole section, and a side wall of the sealing hole section and a side wall of the sealing shaft section are both tilted with respect to an axis of the mounting hole. And the sealing ring is disposed between the side wall of the sealing hole section and the side wall of the sealing shaft section.