Sanforce emergency lighting battery packs are environment-friendly and are certified by leading certifying authorities like the CE. Fully recyclable, they have higher load capacity and charge holding capacities and come with a warranty period. While the warranty period differs from one battery pack type to another battery pack, the capacity of our battery packs are verifiable. We partner with leading emergency battery packs manufacturer like the JJJ battery for sourcing our battery packs. Our expertise in emergency lighting manufacturing gives us an upper hand when it comes to manufacturing and supplying battery packs. We supply three main types of emergency battery packs around the globe: Li-Ion battery packs, Ni-Mh battery packs, and the Ni-Cd battery packs. We work with leading supply chain and the components used in our products are supplied by reliable and quality brands. Our semiconductors are supplied by leading brands such as ON Semiconductors and IR Semiconductors from USA and Rubycon from Japan. Our QC process involves rigorous inspections of all the incoming materials. These materials and our end products go through various types of testing such as the SMT, Auto Aging test, simulation test during and after the production process completes.
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Sanforce offers Li-ion batteries exclusively designed for emergency lights. Because of their high trickle charge capacity, Li-ion batteries work efficiently even at temperatures as high as 60C. Since these battery packs can handle and deliver higher power to appliances, the Li-ion batteries are ideal for power tools that demand big capacity with lighter weight.
Nickel-Metal-Hydride (Ni Mh) emergency lighting battery packs are an earth-friendly option. This rechargeable battery provides useable voltage during the entire discharge, allowing you to experience peak performance every time you use the battery. These battery packs which can be fitted with a remote also, deliver consistent power to emergency lighting sources when needed.
Nickel-Cadmium (NiCd or NiCad) batteries are suitable for emergency lighting equipment as per IEC -2-22. It has high energy storage density, lighter and more compact than lead-acid- batteries. Because of such characteristics, it is preferred as a backup power source for emergency lighting when size and weight are the key selection factors. Along with that, these batteries have a lower self-discharge rate and long cycle life than Ni-Mh batteries.
Despite the differences, all of these three battery types are capable of converting and storing electricity and powering the emergency lights when the mains supply fails. As a major component of emergency lights, you should choose battery packs based on your specific requirements and conditions. Along with that, the life of any battery packs is shorter than the emergency power driver and as such, should be replaced every three years. Though emergency lights come equipped with battery packs, you can order batteries separately also.
By René Joppi, Managing Director, Mackwell
Rechargeable lithium battery technology first emerged in commercial products in the early s and has since grown in popularity. The development of lithium batteries was driven by the need for higher energy density, with portable electronic devices and electric vehicles being the main application areas.
However, lithium batteries are now also one of the preferred solutions for powering emergency lighting standby applications. Not only will this article uncover the many reasons behind why lithium batteries are popular when compared to alternative technologies, but it will also outline some of the considerations that must be made when specifying battery technology…
The Rise in Lithium Technology in Emergency Lighting
Lithium technology competes with the more established Nickel Cadmium (NiCd) and Nickel Metal Hydride (NiMH) technologies, and is often specified due to its potential for longer cycle life and increased energy efficiencies. This, in turn, allows for longer warranties to be offered. Furthermore, due to its lightweight and compact design, the technology is easily installed and can operate at high temperatures.
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In today’s emergency lighting market, only one type of lithium chemistry – lithium iron phosphate (LiFePO4) – is recommended as opposed to lithium-cobalt and lithium-manganese systems more commonly used in portable electronics and electric vehicle applications. This is due to the ‘standby’ nature of emergency lighting applications, where the batteries are not regularly charged and discharged, instead operating in a state of ‘constant top-up’. LiFePO4 batteries are less prone to internal degradation of electrodes and electrode-electrolyte interfaces when used in this way compared to the other lithium chemistries.
Barriers to Safe Lithium Batteries
When handling emergency lighting batteries, safety must always remain front of mind.
Lithium is highly flammable in air and moisture, and great care must be taken when manufacturing and using lithium batteries – especially ensuring temperature limits are not exceeded to prevent fires. Lithium fires result from thermal runaway and are dangerous as they can be particularly difficult to extinguish. This is another reason why it is favoured to opt for LiFePO4 as it has a lower temperature rise in a thermal runaway situation compared to other lithium systems, making it inherently safer.
Instilling Robust Thermal Management
It is highly recommended to only use lithium technology in emergency lighting applications where there is a robust method of thermal management implemented, in particular, thermal monitoring of the battery case temperature through life. Where only a small number of suppliers of lithium battery systems for emergency lighting currently offer this, it is a safety measure not to be overlooked.
It must be noted that the extended lifecycles offered by lithium are still prone to be reduced by poor battery charge regimes and unintentional cycling of charge and discharge during the construction and installation phase. In this respect, lithium systems are no different to NiCd and NiMH. Therefore, choosing systems where the emergency driver has smart-charge and construction protection features is crucial to ensure that the benefits of choosing lithium can be fully realised.
There is no doubt that the emergency lighting industry can benefit from the implementation of lithium battery technology due to its many benefits, such as long cycle life and increased energy density. This can often result in extended warranties being available, something that has traditionally not been offered for other emergency lighting battery systems.
Yet, lithium batteries do not come without their challenges. Great care must be taken when manufacturing and using lithium batteries within the industry, especially with respect to thermal management. Manufacturers need to adhere to safety compliance in the form of temperature monitoring circuits to ensure 100% safety!
Facilities managers looking to reap the benefits of lithium batteries without the safety concerns can look to specialised suppliers of lithium batteries and technology that offer thermal monitoring of the battery case.
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