Electrical Storage Module Cover Prevents Screw Loosening
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Solution Overview
Problem
The connection between voltage detection conductors and bus bars in electrical storage modules can become loose due to vehicle vibrations, leading to screws dropping out and causing unusual noises.
Innovation Solution
An electrical storage module design featuring a voltage detection board with a cover made from insulating material, where the conductive member has a first internal threaded portion that engages a first external threaded component, ensuring the distance between the cover's surface and the component's head is shorter than the threaded portion's length, preventing screws from loosening and dropping out.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage detection conductors are connected to bus bars using screws, then electrical connection is achieved, but the connection becomes loose due to vibration causing screws to drop out and create unusual noises
Solution Approach 1:
The patent applies preliminary action by designing the cover structure to contact the screw head before vibration can cause loosening. The cover is positioned and secured with adhesive tape in advance, creating a pre-established constraint that prevents the screw from moving or loosening during vehicle operation, thereby counteracting the harmful effect of vibration before it can damage the connection
Solution Approach 2:
The patent implements preliminary anti-action by using adhesive tape to fix the cover to the case, creating a pre-applied counter-force against the loosening tendency caused by vibration. This preliminary restraining action opposes the harmful vibration-induced movement before it can occur, ensuring the screw remains securely in place throughout operation
2Ease of manufacture
If screws are used to connect voltage detection conductors to bus bars, then electrical connection is established, but screws may become loose and drop out due to vehicle vibration
Solution Approach 1:
The patent applies preliminary action by pre-positioning the cover over the screw head and securing it with adhesive tape before the product undergoes vibration during vehicle operation. This advance preparation ensures the screw remains constrained and prevents loosening without complicating the assembly process
Solution Approach 2:
The patent introduces the cover as an intermediary element between the screw and the external environment. This cover component serves as a mediator that transmits restraining force from the adhesive tape to the screw head, preventing the screw from loosening due to vibration while maintaining the simplicity of the overall connection structure
Data Source
AI summary
An electrical storage module in which a plurality of electricity storage elements are electrically connected by conductive member, includes: a voltage detection board having voltage detection conductor that detects terminal voltage of the electricity storage element; a first external threaded component that connects the voltage detection conductor of the voltage detection board to the conductive member; and a cover that covers the voltage detection board; wherein: the cover is made from an insulating material; the conductive member has a first internal threaded portion into which the first external threaded component is to be screwingly engaged; and the distance between the inside surface of the cover that faces a head portion of the first external threaded component and an upper surface of the head portion of the first external threaded component is shorter than the distance between an end portion of the first internal threaded portion towards the cover side and an end of shaft portion of the first external threaded component.