Abhi Europe ko battery sector mein China se kaafi tough competition face karna pad raha hai, especially electric vehicles ki batteries develop karne mein. Problem raw materials ki bhi hai, jaise lithium or kaafi rare earth elemets, jisme China ko already big advantage hai. In addition China mein manufacturing cost bhi kaafi low hai, because China mein wages Germany ke comparison mein 10x se bhi zyada lower hai.
Saath hi, electric cars ka ek big issue hota hai, winter. Jab temperature kaafi low ho jaata hai, then battery ki performance pe effect hota hai, jaise discharge power drop ho jaati hai or capacity bhi unti achhi maintain nahi rehti. Ye problem especially lithium batteries mein zyada reflect karti hai, especially lithium iron phosphate (LFP) batteries jo market mein kaafi common hai.
Europe has two primary issues with electrification
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The good thing is technology or science mein jo progress ho rahi hai, usse lagta hai ki ye both problems ek hi solution se solve ho sakti hai, basically ek teer se do nishane. Lithium batteries ke alternative already exist karta hai, jo dono major issues ko ek saath tackle kar sakta hai. Agar ye work kar gaya, then energy transition ko fast track karne mein kaafi help milegi or European Union ke goals achieve karna bhi easy ho jayega, saath hi manufacturers ko heavy multimillion euro fines avoid karne ka chance mil jayega.
Hum yahan sodium batteries ke development ki baat kar rahe hai. Ye batteries ka structure to some extent popular or widely used LFP batteries jaisa hi hota hai. Bas issue ye hai ki inki energy density usually itni strong nahi hoti. Ye LFP batteries se bhi thodi behind reh jaati hai, or NMC batteries ke level ke paas bhi nahi reach kar pati, jahan energy density 200-250 Wh/kg hoti hai, or kuch cases mein nickel content ke according 300 Wh/kg tak bhi chali jaati hai.
Sodium batteries
Sabse pehli and most important problem jo ye manufacturers ke liye solve karta hai, wo availability hai. Sodium lithium ke comparison mein kaafi zyada easily available hai, or cobalt ya graphite se extract karna bhi easier hai, jo normal batteries mein use hote hai. Europe mein lithium ke reserves abhi bhi pade hai, Spain jaise countries mein, jaise Caceres or Ourense, but environmental protection rules ki wajah se wahan abhi mining nahi ho rahi.
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Is approach se jo second problem slove hoti hai, wo temperature ka hai. Sodium batteries extreme temperature or cold winters ko kaafi better handle karti hai. Kuch tests ke according, -30°C par inka discharge rate LFP batteries ke comparison mein approx. 3 times more hai. -40°C par bhi ye 90% se zyada capacity maintain karti hai. And yes, -50°C jaisi extreme cold mein bhi battery stably discharge hoti hai rehti hai.
It has significant benefits over lithium batteries
Simple words mein kehein toh, jab lithium batteries sirf 50% tak hi chal paati hai, usually jo range 20-25°C ke around measure hoti hai, wahin sodium batteries ka performance kaafi better hota hai. Spain jaise countries mein ye zyada noticeable nahi hai because wahan aise temperatures common nahi hote, but central or northern Europe mein iska impact kaafi big ho sakta hai.
Ek or big advantage unki safety hai, ye impacts or even cuts ko zyada achhe se handle kar liti hai. Abhi jo challenges bache hai wo mainly cost se related hai: R&D, manufacturing, or obviously end user ke liye price. Saath hi, inko or optimize karna padega so that energy density zyada ho. And of course, battery life bhi aisi ho jo market mein already available batteries ke saath properly compete kar sake.
They are already available in China
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Haan, ek drawback ye bhi hai ki China yahan bhi advantage mein hai. Is week Changan ne apna Nevo A06 present kiya, jo pehle se market mein tha, but ab isme new 45 kWh sodium batteries install ki gayi hai (jo CALT ne apni new Naxtra technology ke saath develop ki hai).
Company ke according ye 400 km ka range deta hai, haa, CLTC cycle ke according, jo Europe wale WLTP se kaafi zyada optimistic hota hai, ye yaad rakhna.
Figures waise kuch special impressive nahi lagte (haan, energy density 175 Wh/kg kaafi interesting hai), because A06 mein already LFP batteries hai jo 600 km se zyada range de deti hai (CLTC). But CATL-BYD, LG or Sanmsung jaise world ke biggest battery makers ka believe hai ki future mein unki sodium batteries bhi 500-600 km tak ki range achieve kar sakti hai.
Sweden had already tried it
The question is Europe sodium availability ka kitna benefit gain kar sakta hai battery manufacturing ke liye, or saath saath China par apni dependency kitni reduce kar paayega? Northvolt ne pehle bhi ye try kiya tha, company ke paas China par dependency break karne ka full potential tha, but unfortunately 2024 mein usse apne operations close karne pade.