Charger-Mounted Transformer With Fire Suppression and Heat Venting
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Solution Overview
Problem
Existing electric vehicle charging systems face safety and efficiency issues due to the risk of fire spreading without fire extinguishing systems, ineffective heat emission leading to charger malfunctions, current backflow causing damage, and overcurrent blocking only after charger damage occurs.
Innovation Solution
An electric vehicle charger-mounted transformer with automatic fire extinguishing systems, air vents for heat emission, current backflow prevention diodes, and overcurrent blocking functions, along with communication and display devices for emergency response, using environmentally friendly fire extinguishing agents and non-conductive materials to enhance safety and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transformer with insulating oil is used in existing charging systems, then electrical insulation and power transformation are achieved, but fire risk and fire spread increase when a fire occurs
Solution Approach 1:
The patent extracts and removes the insulating oil from the transformer, replacing it with an oil-free design that uses solid insulation materials. This eliminates the fire-hazardous insulating oil while maintaining the transformer's electrical insulation and power transformation functions, directly resolving the contradiction between insulation reliability and fire safety.
Solution Approach 2:
The patent changes the physical state and composition of the insulation medium from liquid oil to solid insulation materials. This parameter change eliminates the flammability characteristic while preserving the electrical insulation properties, thereby reducing fire risk without compromising reliability.
2Productivity
If fast charging is performed without adequate heat emission, then charging speed increases, but heat accumulation causes charger failure or malfunction
Solution Approach 1:
The patent incorporates heat dissipation structures and thermal management systems in advance within the charger design. These preliminary heat emission pathways are built into the charger's structure before operation, enabling effective heat removal during fast charging and preventing heat accumulation that would lead to failure.
Solution Approach 2:
The patent introduces heat dissipation structures as intermediary elements between the charging components and the external environment. These intermediaries facilitate the transfer and emission of heat, allowing fast charging to proceed while maintaining operational reliability through controlled heat removal.
3Reliability
If overcurrent blocking function is installed in the transformer, then overcurrent protection is provided, but the charger is damaged before the overcurrent is blocked
Solution Approach 1:
The patent positions the overcurrent blocking function at the transformer level rather than downstream in the charging circuit. This preliminary placement of the protective function ensures that overcurrent is blocked at its source before it can propagate through and damage the charger components, eliminating the time delay and preventing damage.
Solution Approach 2:
The patent uses the transformer as an intermediary protective element that blocks overcurrent before it reaches the charger. This intermediary positioning of the blocking function creates a protective barrier that prevents harmful currents from damaging downstream components.
4Productivity
If battery current flows back during charging in existing systems, then charging process continues, but charger and electric vehicle may be damaged due to abnormal operation
Solution Approach 1:
The patent addresses the potential harmful effect of battery current backflow by designing the charging system to safely handle or prevent reverse current flow. This converts the potential harmful backflow into a controlled condition that does not cause damage, maintaining charging continuity while ensuring safety.
Data Source
AI summary
The present invention is an electric vehicle charger-mounted transformer with a system that enables AC power generated from the lower voltage side of the transformer to be converted into electric vehicle charging power, and at the same time, the electric vehicle to be charged, and in more detail, an electric vehicle charger includes a slow-charging device and a fast-charging device, the slow-charging device and the fast-charging device are connected to automatic fire extinguishing devices, respectively, and the automatic fire extinguishing devices automatically operate when the automatic fire extinguishing devices detect that at least one of a temperature of the slow-charging device and a temperature of the fast-charging device rises above a given temperature or detect generation of smoke.