FUTURE TECHNOLOGY batteries . LCO batteries are mainly applied in the mobile phone battery industry . LMO batteries are mainly used in the electric bicycle industry . LFP batteries are widely used in buses and energy storage plants , while NCM batteries are widely used in household vehicles , taxis and energy storage plants . LFP and NCP batteries are commonly used in data centres . LFP batteries are more reliable , while NCM batteries provide higher energy density .
1 . LFP batteries use a stable structure . LFP batteries use an olivine three-dimensional structure , while both LCO and NCM batteries use a layered two-dimensional structure , which is easy to collapse . The structure of LFP batteries is more stable .
2 . LFP batteries feature high thermal stability as well as a low rate and amount of heat yield .
• LFP batteries are stable and generate little heat in high temperature environments . The peak power output for heat yield is only approximately 1W .
• NCM batteries are prone to oxygen evolution at high temperatures or pressure , which increases the burning possibility . The peak power rate for heat yield is approximately 80W / min . Explosive burning ( within seconds ) can easily be triggered , which is hard to control .
• The total heat generated by LFP batteries is far lower than that of NCM and LMO batteries ( the area formed by the heat yield power curve and the horizontal axis represents the total heat generated ).
3 . LFP batteries generate no combustion accelerant in the case of thermal runaway reaction . LFP batteries do not generate oxygen after thermal runaway , while LMO , LCO and NCM batteries do . Therefore , the latter three are easier to catch fire .
LFP batteries cause thermal runaway only at a high temperature , while LMO , LCO and NCM batteries cause thermal runaway at far lower temperatures .
Bottlenecks of lithium battery application in data centres
Cost is a bottleneck , but cost reduction will unlock potential
As lithium batteries are widely used in sectors such as electric vehicles , industrial energy storage and terminal devices and the industry ecosystem is established , the cost of lithium batteries decreases year by year . However , the cost of lead-acid batteries is fluctuating and will rise in the future . Therefore , lithium batteries will have obvious cost advantages in the near future and will see wider application in data centres . As different lead-acid battery brands and prices exist in the market , lithium batteries are currently more expensive than lead-acid batteries .
Safety assurance for lithium battery application in data centres
1 . Root causes of lithium battery safety incidents If battery over temperature and overvoltage occur , many side reactions of heat release occur inside the battery , causing positive feedback of heat . Consequently , thermal runaway occurs , which will generate high temperature and a large amount of flammable gas and even cause a fire .
The root causes of thermal runaway lie in mechanical , electrical and thermal stimulation .
2 . Lithium battery safeguarding methods Lithium-ion battery burning incidents in recent years are caused by internal short circuits , lithium plating , high temperature and volume change .
LFP cells alone cannot solve all the problems . Lithium battery designs in
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INTELLIGENT TECH CHANNELS Issue 34
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