Pressurized Explosion-Proof Battery Enclosure With Split Protection
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Solution Overview
Problem
Existing explosion-proof apparatuses with flameproof enclosures for batteries and protective devices are larger and heavier than necessary, as they require additional components that increase size and weight while attempting to prevent ignition.
Innovation Solution
The apparatus features a frame with a hollow shape, a gas supply device to maintain internal pressure higher than external pressure, an electrical component, a battery that supplies power, a protective device to stop power supply, and separate enclosures for the battery and protective device – an increased-safety enclosure for the battery and a flameproof enclosure for the protective device, without a management device in the battery enclosure, allowing for insulation and reduced size and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery and protective device are housed in a flameproof explosion-proof enclosure, then ignition is prevented, but the size and weight of the apparatus increase
Solution Approach 1:
The apparatus is divided into separate enclosures: a flameproof explosion-proof enclosure for the protective device and a separate increased-safety explosion-proof enclosure for the battery. This segmentation allows each component to have its own optimized protective structure, preventing the need for a single large flameproof enclosure that would contain both components, thereby reducing overall size and weight while maintaining ignition prevention capabilities.
Solution Approach 2:
Different levels of explosion-proof protection are applied to different components based on their specific requirements. The protective device receives flameproof protection (higher safety level), while the battery receives increased-safety protection (appropriate for its characteristics). This localized application of safety measures optimizes the overall protection strategy without unnecessarily increasing weight and size for all components.
2Reliability
If the battery and protective device are housed in a flameproof explosion-proof enclosure, then ignition is prevented, but the size of the apparatus increases
Solution Approach 1:
The apparatus is divided into separate enclosures: a flameproof explosion-proof enclosure for the protective device and a separate increased-safety explosion-proof enclosure for the battery. This segmentation allows each component to have its own optimized protective structure, preventing the need for a single large flameproof enclosure that would contain both components, thereby reducing overall size and weight while maintaining ignition prevention capabilities.
3Reliability
If a management device is added to manage battery parameters, then battery safety is improved, but the device complexity increases
Solution Approach 1:
The management device for monitoring battery parameters is extracted from the main protective device enclosure and placed separately. This extraction simplifies the main flameproof enclosure by removing complex management circuitry, while the battery management function is maintained in a separate location, reducing overall device complexity while preserving battery safety monitoring capabilities.
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
This configuration effectively prevents ignition while minimizing the size and weight of the explosion-proof apparatus, allowing it to operate in explosive atmospheres without the need for larger, heavier enclosures.
Implementation Method 1
an internally pressurized explosion-proof structure which has a frame (11) having an internally pressurized explosion-proof structure
Implementation Method 2
the certain distance is a distance greater than or equal to a distance at which the battery and the outer circumference of the battery housing enclosure are kept insulated from each other
Data Source
Figure 1
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Figure 3
AI summary
Increasing a size and a weight is avoided while ignition is prevented. An explosion-proof apparatus (10) includes: a frame (11) having a hollow shape; an air supply device (31) capable of maintaining the inside of the frame (11) at pressure higher than certain pressure by supplying gas to the inside; an electrical component (21) disposed inside the frame (11); a battery (17) configured to supply power to the electrical component (21); a protective device (18) capable of stopping power supply from the battery (17) to the electrical component (21); a battery housing enclosure (15) being an increased-safety explosion-proof enclosure configured to house the battery (17) therein; and a protective device housing enclosure (16) being a flameproof explosion-proof enclosure configured to house the protective device (18) therein. The explosion-proof apparatus (10) does not include, inside the battery housing enclosure (15), a management device that manages parameters of the battery (17).