author: Eric Walz
CATL’s new sodium-ion batteries. The aggregation said it will bureaucracy a assembly band by abutting year.
Improvements in electric agent array chemistries over the years has resulted in EVs that are added powerful, bear a best ambit and allegation added quickly. But new improvements in array chemistries, including sodium-ion batteries (NIB), could extend ambit alike added and annihilate the accident of fires associated with lithium-ion batteries, which afresh resulted in the contempo anamnesis of all Chevy Bolt EVs produced by General Motors.
Chinese array maker Contemporary Amperex Technology Co., Ltd. (CATL), which is a above supplier of batteries to automakers Tesla, Volkswagen and others, said it will put a sodium-ion array assembly band into operation by abutting year.
The company’s affairs were aggregate by Meng Xiangfeng, abettor to administrator of CATL, at a contempo automated appointment in China focused on carbon neutrality, Chinese account aperture Gasgoo reported.
Mr. Meng said CATL has assuredly apparent abounding abstruse problems associated with bearing sodium-ion batteries, including the limitations on the raw actual production. The claiming now is to access assembly accommodation and body a raw actual accumulation chain.
CATL appear its first-generation sodium-ion array in July.
Sodium-ion array allure is agnate to accepted lithium-ion batteries with absolute and abnormally answerable ions affective amid the cathode and anode abstracts central the battery.
However, one of the challenges CATL faced is that sodium ions accept a beyond aggregate and college requirements for structural stability. According to the company, this has become a aqueduct for the industrialization of sodium-ion batteries.
CATL’s atypical band-aid was to advance a adamantine carbon anode actual with a absorptive structure. The stronger yet absorptive anode actual enables the abounding accumulator and fast movement of sodium ions, as able-bodied as outstanding aeon performance, according to the company.
CATL additionally said it activated cathode actual with a college specific accommodation and redesigned the aggregate anatomy by rearranging the electrons, which apparent the botheration of accelerated accommodation accident back again cycling sodium-ion batteries.
Sodium-ion batteries could become a applicable band-aid for the auto industry as its transitions to electrification. CATL’s aboriginal bearing sodium-ion batteries accept high-energy density, fast-charging capability, accomplished thermal stability, as able-bodied as accomplished low-temperature performance, according to the company.
The new sodium-ion array allure could advance to boundless acceptance of EVs by abbreviation costs significantly, authoritative electric cartage added affordable. In addition, sodium-ion batteries accommodate no lithium, azure or nickel, which are the primary metals acclimated in nickel-cobalt-aluminium (NCA), nickel-cobalt-manganese (NCM) and lithium adamant phosphate (LFP) batteries.
But conceivably the better advantage of sodium-ion batteries is the accustomed affluence of bargain sodium as a raw material. It can be extracted in accumulation quantities from seawater at low cost.
The availability of bargain sodium could accomplish bartering assembly of sodium-ion batteries abundant beneath than lithium-ion batteries today, which currently amount about $126 per kWh to produce, according to the latest abstracts from Bloomberg New Activity Finance (BNEF), which advance the array industry.
CATL did not accommodate the costs per kWh to aftermath its new sodium-ion batteries.
CATL says its sodium-ion array offers an activity body of 160Wh/kg, currently the accomplished activity body in the apple for this blazon of battery. At allowance temperature, the array can be answerable to 80% of its accommodation aural 15 minutes.
Although an activity body of 160Wh/kg for CATL’s sodium-ion array is beneath than a lithium-ion battery’s boilerplate activity body of 250-270 Wh/kg, CATL expects the activity body of its next-generation sodium-ion array to beat 200Wh/kg in the approaching as improvements are made.
Cold acclimate achievement is alike added impressive. CATL claims that in acute temperatures of -20°C, the sodium-ion battery’s accommodation assimilation amount is added than 90%. A archetypal lithium ion array would about lose about 40% of accessible accommodation at this temperature, apery a assimilation amount of aloof 60%.
CATL additionally afresh apparent its AB array arrangement solution, which is able to mix and bout sodium-ion batteries and lithium-ion batteries and accommodate them calm into a distinct array pack. The two altered types of array beef can be monitored apart application array administration arrangement (BMS) software.
For example, CATL’s AB array software can atone for the lower energy-density of sodium-ion batteries, while demography advantage of the college ability and achievement of newer lithium-ion or silicon-ion batteries in acutely algid temperatures.
CATL additionally aims to rapidly aggrandize its affiliation with Tesla and become its better array supplier globally. The aggregation is aiming to accumulation bisected of the array beef Tesla uses for its electric cartage and activity accumulator systems, a chief antecedent at the Chinese aggregation told Reuters in June.
Last year, CATL said its accessible to body an EV array with an accepted lifespan of 1.2 actor afar or 16 years afore it needs replacement.
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