Battery Lid Plate Baffling for Terminal Torque Isolation
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Solution Overview
Problem
Conventional battery terminal attachment structures face issues with airtightness and conductivity due to direct application of fastening torque, leading to potential loosening of connections and damage to thread ridges, especially when using aluminum alloys, and require complex assembly processes.
Innovation Solution
A battery design featuring a baffling portion on the lid plate that restricts rotation of the external terminal, using a projecting or recessed shape to engage with the terminal, combined with a terminal insulation member to prevent torque transmission and ensure secure sealing and connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the external terminal is directly fastened to the battery container using a nut and bolt, then the terminal connection is established, but the fastening torque directly applies to the tube and caulking portion, causing connection loosening and airtightness deterioration
Solution Approach 1:
The patent introduces a dedicated terminal fixing portion with a threaded hole as an intermediary structure. This threaded hole serves as a mediator that receives the nut and bolt, isolating the fastening torque from the tube and caulking connection. The terminal fixing portion absorbs the mechanical stress of fastening, preventing torque transmission to the sealed connection between the tube and battery container.
Solution Approach 2:
The patent segments the terminal structure into distinct functional portions: the tube for sealed connection, the terminal body for electrical connection, and the terminal fixing portion for mechanical fastening. This segmentation separates the fastening function from the sealing function, allowing independent optimization of each. The terminal fixing portion is specifically designed to handle fastening torque without affecting the sealed connection integrity.
2Reliability
If aluminum alloy is used for the external terminal to ensure conductivity, then electrical performance is improved, but the thread ridge of the bolt portion is easily damaged during repeated nut attachment and detachment
Solution Approach 1:
The terminal fixing portion with its threaded hole acts as an intermediary that protects the vulnerable thread ridge. By designing a dedicated threaded structure in the terminal fixing portion, the patent creates a robust mounting point that can withstand repeated fastening cycles without damaging the aluminum alloy terminal body or affecting electrical conductivity.
3Reliability
If the tube is fitted through multiple components (battery container, lid plate, insulating members) to ensure sealing, then airtightness is achieved, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The patent merges the sealing and fastening functions into an integrated terminal structure. The terminal body and terminal fixing portion work together as a unified assembly that simultaneously achieves sealed connection through the tube and secure fastening through the threaded hole. This merging reduces the number of separate components and simplifies the assembly process while maintaining airtightness.
4Ease of operation
If the external terminal is allowed to rotate during fastening, then ease of connection is improved, but the insulating and sealing members may shift, causing defective sealing
Solution Approach 1:
The patent implements preliminary positioning through the terminal fixing portion and its engagement structure. Before fastening occurs, the terminal is pre-positioned and restrained by the terminal fixing portion, preventing rotation that would shift the insulating and sealing members. This preliminary action ensures proper alignment is maintained throughout the fastening process, preserving sealing reliability while allowing operational ease.
Data Source
AI summary
A battery includes a power generating element, a battery container containing the power generating element, a lid plate covering a top opening of the battery container, the lid plate including a metal plate and a baffling portion including an integral portion of the lid plate that extends from the lid plate, and an insulating member provided on the lid plate. Corners of the insulating member fit to corners of the baffling portion.