Voltage Detection Unit Guide Surface Alignment
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Solution Overview
Problem
The existing voltage detection systems in stacked power storage devices face challenges in workability due to complex position alignment and space constraints, making it difficult to securely connect detection terminals to conductive plates with thin plate shapes.
Innovation Solution
A voltage detection unit with a plate-shaped housing that accommodates a voltage detection terminal and a cover with an extension piece and guide surfaces, allowing for improved alignment and connection efficiency by reducing the need for additional components and minimizing contact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an insertion hole is provided in the conductive plate and the detection terminal is inserted from the side of the stacked body, then the connection can be established, but the position alignment becomes complicated and workability deteriorates
Solution Approach 1:
Instead of inserting the detection terminal from the side of the stacked body through an insertion hole in the conductive plate, the invention inverts the connection approach by providing a through-hole in the housing and having the detection terminal pass through it from the opposite side. This allows the detection terminal to be connected to the conductive plate in a manner that simplifies position alignment and improves workability while maintaining connection reliability.
2Volume of moving object
If the power storage module and conductive plate have thin plate shapes, then the device structure is compact, but space for providing additional connection components is insufficient
Solution Approach 1:
The invention merges the housing structure with the connection function by integrating the through-hole directly into the housing. This eliminates the need for separate connection components or additional space, allowing the detection terminal to be connected while maintaining the compact thin plate shape of the power storage module and conductive plate.
Solution Approach 2:
The housing serves multiple functions: it provides structural support, houses the detection terminal, and incorporates the through-hole for connection purposes. This multi-functionality reduces the need for additional components and maintains device compactness while enabling reliable connection.
3Reliability
If the detection terminal is connected via insertion hole in the conductive plate, then the connection can be established, but the position alignment between insertion hole and detection terminal is complicated
Solution Approach 1:
The invention inverts the connection approach by providing the through-hole in the housing rather than in the conductive plate. This allows the detection terminal to be aligned with the through-hole from the opposite side, simplifying position alignment and reducing the need for high manufacturing precision while ensuring reliable connection establishment.
Data Source
AI summary
A voltage detection unit includes a voltage detection terminal, a housing including a terminal accommodating concave and a cover to be attached to the housing and to cover the voltage detection terminal accommodated in the terminal accommodating concave. The cover includes an extension piece extending in a first direction. The housing includes an accommodating hole to accommodate the extension piece, and a guide portion including an inclined surface and a guide surface. The inclined surface has a first end in the first direction and a second end and is inclined with respect to the first direction such that the first end is provided closer to the accommodating hole than the second end in a second direction perpendicular to the first direction and being parallel to the housing. The guide surface is continuous with the inclined surface and an inner wall surface of the accommodating hole.