Space-Limited Overvoltage Protection Module with Parallel Branches
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Solution Overview
Problem
Existing overvoltage protection modules in space-limited installations lose their protective function after triggering, posing a safety risk until the module is replaced, and they are not suitable for fast heating processes or reliable signaling.
Innovation Solution
A space-limited protection module with two overvoltage protection elements in parallel current branches, each with a local multistage indicator and thermally softenable force accumulators that allow for distinct states of warning and defect, enabling continuous protection and signaling after disconnection, with holding devices to secure disconnected elements and minimize structural size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a temperature fuse is used for overvoltage protection, then thermal overload protection is achieved, but the protection function is lost after triggering and the response is too slow for very fast heating processes
Solution Approach 1:
The protection module is divided into multiple independent protection elements (first and second overvoltage protection elements) arranged in parallel current branches. Each element can operate independently, allowing one element to provide protection while another triggers and disconnects, ensuring continuous protection function after triggering.
Solution Approach 2:
The patent uses different response characteristics for different protection elements. The first overvoltage protection element has a lower response threshold and triggers at lower overvoltage levels, while the second element provides backup protection. This parameter differentiation enables both fast response and continuous protection.
2Volume of moving object
If protection modules are designed with space-limited constraints, then structural size is reduced for compact installations, but the complexity of providing continuous protection and reliable signaling increases
Solution Approach 1:
The patent combines multiple functions into a single compact module: overvoltage protection, disconnection signaling, and defect signaling are all integrated into one space-limited structure. The parallel arrangement of protection elements and integrated indicator system achieves space efficiency while maintaining functional complexity.
Solution Approach 2:
The local multistage indicator uses color changes to provide clear visual signaling of different states (operating, warning, defect) without requiring complex electronic displays. This simple optical signaling method reduces structural complexity while providing reliable state indication.
3Speed
If overvoltage protection elements are arranged in parallel current branches with force accumulators, then fast and reliable disconnection is achieved, but the structural size and manufacturing complexity increase
Solution Approach 1:
Force accumulators (springs) are pre-loaded during assembly to exert separating forces on the protection elements. When an element triggers, the pre-stored mechanical energy from the springs immediately drives the disconnection action, achieving fast response without complex active actuation mechanisms.
Solution Approach 2:
The patent replaces electronic or electromagnetic disconnection mechanisms with a purely mechanical system using springs and thermal actuation. This substitution simplifies manufacturing while achieving reliable and fast mechanical disconnection when thermal expansion triggers the release mechanism.
4Reliability
If a local multistage indicator is integrated into the protection module, then reliable state signaling is achieved, but the structural size and device complexity increase
Solution Approach 1:
The local indicator serves multiple functions within a compact area: it indicates operating state, warning conditions, and defect states through a unified multistage display mechanism. This multi-functionality reduces the need for separate indicators for each state, minimizing the total area required.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables fast and reliable disconnection with continued protective function, reduces structural size, and allows for secure shutdown in high-temperature situations, providing redundancy and economical production.
Implementation Method 1
the thus-triggered overvoltage protection element can be displaced to the side (parallel to the surface of the circuit board P), so that an electrical connection to the respective conductor tracks of the circuit board P is interrupted
Implementation Method 2
The first force accumulator F1 and the second force accumulator F2 each exert a force on the associated overvoltage protection element TVS1, TVS2 in parallel with the surface of the circuit board P
Data Source
AI summary
The invention disclosure relates to a space-limited protection module with at least two overvoltage protection elements in parallel current branches, where the protection module includes a local multistage indicator for indicating at least one operating state, a warning state and a defect state, and where the parallel switched overvoltage protection elements are arranged on a circuit board in electrical connection to conductor tracks of the circuit board and attached in a thermally softenable manner.