In recent years, the improvement of safety awareness has made users pay more attention to the application of emergency lighting, and the future market capacity is considerable. As the core of emergency lighting, emergency power supply plays a key role. But at present, users don't know about emergency power, isn't it power with battery? Not so, the two seem to be almost the same, but the technology inside the emergency power supply is much higher than the drive power supply. Functionally, it plays an up-down role.

China LED emergency power supply manufacturer, supplier & Lin Sheng elaborated the performance requirements of emergency power supply

The special function of the emergency power supply is that it is a hidden product and is inactive most of the time. Unlike ordinary power supplies, emergency power supplies have an emergency function that can start the backup battery to light up in an emergency.

 
Its basic working principle is that it is directly powered by mains power every day and uses AC / DC drive control circuits to provide low-voltage DC power. It mainly powers the LED lights during normal maintenance and recharges the system's own backup battery. Or when the main power supply fails, the emergency backup battery drives the emergency light and powers the electrical equipment.

 
Because of its particularity and importance, users have much higher requirements for emergency power supplies than ordinary power supplies, and they have higher response speed, emergency lighting time, battery capacity, and conversion efficiency after turning off the power. put forward.

 
In terms of startup / conversion time, there are differences according to actual engineering and related specifications: the conversion time of standby lighting and evacuation lighting should not be greater than 5s; the conversion time of safety lighting should not be greater than 0.5s. In particular, metal halide lamps have high requirements for conversion speed, such as applications in industrial and mining lighting, cashier counters, stages and other places. It is understood that Yinglang Optoelectronics, the first domestic company focused on emergency power supply, has increased the conversion speed to 0.01 seconds, and the naked eye can hardly see the instant of conversion.

As far as the conversion voltage is concerned, it is usually 132-187V in China, that is, the emergency power must be turned on when the power drops to 132V. If it exceeds 187V, it must be switched back to the main power state. Europe is also in this range. The US market is not a wide voltage, but is usually controlled at 80-85V, so certification is easier to pass, which also symbolizes the needs of users.

 
In terms of emergency lighting time, emergency lighting in general evacuation areas, vertical evacuation areas, dense evacuation areas and underground evacuation areas is at least 30 minutes; emergency evacuation areas, evacuation areas for emergency lighting are at least 60 minutes; such as fire rooms, power distribution Emergency lighting for rooms, pump rooms, etc. for at least 180 minutes. The emergency lighting time is mainly related to the battery. Currently, it is usually 90 minutes or longer in China and 3 hours in Europe.

In terms of emergency lighting brightness, it is mainly related to the output power of the battery. The output power is controlled by the power supply. A more general solution is to use a constant power output to control the technology. Constant current solutions may also need to consider the current and voltage of the lamp beads, so the deviation is relatively large. Generally, the minimum requirement for the European market is 5W. Unless the customer has a requirement for the brightness of the emergency lighting equipment in some cases, it is necessary to provide a corresponding solution according to the specific situation.

In terms of battery charge and discharge, previous domestic standards were: Ni-Cr batteries need to be charged for less than 24 hours, the charging current (overcharge current) cannot be greater than 0.05C, and the overdischarge voltage is 80%. At present, backup batteries include three types of lithium batteries: nickel-chromium and nickel-metal hydride batteries, and battery materials can be selected according to customer requirements. If you need a smaller volume, you can only choose lithium batteries. At the same capacity, lithium batteries have twice or three times the capacity of nickel-metal hydride batteries. Although the cost of lithium batteries was high in the past, with the development of electric vehicles in the past two years, companies have poured into the lithium battery industry, and their costs have been greatly reduced, which is conducive to the popularity of emergency lighting.

 
In addition, emergency power supplies for linear products require pulsed current design because linear IC designs have a cycle detection function. If the power supply does not implement pulsed current design, the product size will increase and the cost will increase accordingly. At present, some companies have adopted low-cost, small-volume linear solutions for emergency lighting.

In addition to many high requirements for performance, there is one more important point. Emergency lighting is a fire safety product. Any component must be designed in strict accordance with safety requirements to meet safety certification requirements and achieve reliability. Above standards. However, at present, there is no special standard for emergency power supply in the domestic market, and the market circulation products are uneven. In the domestic market, government needs are more important than technical hardware. Foreign markets are more stringent, requiring power supplies and products to pass UL certification.

 
At present, emergency lighting has been widely used in factories, industrial and mining, chemical plants, shopping malls, gas stations, stages and other places that have high requirements for product performance and reliability, and has regional requirements, that is, the product's temperature adaptability is strong, but In cold regions, the emergency power performance of many domestic companies cannot meet the requirements.

The future will involve more product reliability, performance optimization and patent competition. Enterprises with stronger professionalism and technological innovation capabilities will have the absolute advantage of leading the country in this small batch market.

Linsheng     specializes in the production and supply of high-quality LED emergency lights and LED emergency power products in China. Has a complete production management system; has its own laboratory and the most advanced testing equipment in the industry to ensure product quality. Maintain our price advantage and quality advantage to satisfy our customers. Welcome to visit: https://www.linsheng.com...