Battery Module Bolt Neck Structure for Torque in Low-Profile Heads
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing bolts for batteries and battery modules face issues with reduced space efficiency due to protruding heads, leading to lower fastening torque and potential damage, and there is a need for improved fastening torque and space efficiency.
Innovation Solution
A bolt design featuring a reinforcing neck with increasing diameter from the threaded body to the head, a dog point for easy alignment, and a hexalobular plus-shaped socket for enhanced fastening torque and assembly, along with a coating layer to prevent loosening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the height of the bolt head is lowered to improve space efficiency, then the space efficiency of the battery module is improved, but the fastening torque is lowered
Solution Approach 1:
The patent introduces a reinforcing neck with increasing diameter from the threaded body toward the head, creating a dimensional transition that compensates for the reduced head height. This dimensional change in the neck structure provides the necessary mechanical strength to maintain fastening torque despite the lowered head profile, thus resolving the contradiction between space efficiency and fastening torque.
Solution Approach 2:
The reinforcing neck creates a local quality variation in the bolt structure, with the diameter increasing specifically in the region where mechanical strength is most needed. This localized structural enhancement allows the bolt head to be lowered for better space efficiency while the reinforcing neck maintains the required fastening torque through its increased diameter section.
2Force
If a general bolt with protruding head is used, then the fastening torque can be maintained, but the space efficiency is lowered
Solution Approach 1:
The bolt is segmented into distinct functional sections: a lowered head portion for space efficiency, a threaded body for fastening, and a reinforcing neck connecting them. This segmentation allows each portion to be optimized independently - the head is minimized for space while the reinforcing neck provides the necessary structural support to maintain fastening torque.
Solution Approach 2:
The reinforcing neck introduces a dimensional transition zone between the lowered head and the threaded body. By varying the diameter along the length of the neck, the structure achieves both compactness (from the lowered head) and strength (from the increasing diameter), thereby maintaining fastening torque while improving space efficiency compared to traditional protruding head bolts.
Data Source
AI summary
A bolt for a battery includes a head in which at least a portion of a socket is formed, a threaded body including a threaded area in which a spiral thread is formed, and a reinforcing neck connected between the head and the threaded body and having a diameter increasing in a direction from the threaded body toward the head.