Four energy storage battery technologies Four energy storage battery technologies
At present, most electric vehicles use lithium iron phosphate batteries, but there are still several difficulties in popularizing lithium batteries:
(1) Price. The cost of batteries accounts for more than half of electric vehicles. The latest Tesla cars cost more than 700,000 yuan, which ordinary people can't afford.
(2) Energy density. The theoretical specific capacity of the lithium iron phosphate battery is 170 wh/kg, and the theoretical specific capacity of the lithium cobaltate battery is 200 wh/kg. Therefore, most of the load on a lithium battery is spent on the weight of the battery.
(3) Security.
(4) Charging time. The fast charge mode can be filled with 80% in a few minutes, but the battery damage is relatively large and there is a certain danger. Slow charging takes several hours to ten hours. Manufacturers generally recommend using the slow charge mode.
2, super capacitor
According to reports, "supercapacitors are expected to replace batteries" has no reliable basis. Although the energy density of supercapacitors will increase significantly after the introduction of graphite thinning, it is still far lower than lithium batteries, and the energy density of supercapacitors is 74 wh/kg. However, the advantage of supercapacitors is that the charging time is very short (several seconds) and safe, and can be used for auxiliary peak shaving and brake energy storage of electric vehicles.
3. Hydrogen-powered cars
Hydrogen-powered car technology has made great progress in recent years, with the advantages of short inflation time and strong power. But the problem that is currently being solved is
(1) Production cost of hydrogen
(2) Safe and high-strength hydrogen storage tank
(3) Security
(4) The price of inflatable equipment. Among them, the issue of security is especially important. In addition, whether the hydrogen production process is environmentally friendly is also controversial.
4, flow battery
The current flow battery mainly has zinc bromine flow battery and all vanadium flow battery. The cost price of zinc bromine flow battery is only about 1/5 of that of all vanadium flow battery, which has natural advantages.
(1) Price. The cost of a zinc-bromine flow battery is now close to that of a lead-acid battery, and in theory it can be lower in the future. Only about 1/5 of the lithium battery.
(2) Energy density. The energy density can reach 430Wh/kg. Travel distance is longer.
(3) Security. very safe.
(4) Charging time. Can be very short, fast charging mode does not damage the battery.
(5) In addition, there are other advantages such as long life, 100% deep discharge, no self-discharge, super high power, instant charging, and almost no requirement for working environment.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
At present, most electric vehicles use lithium iron phosphate batteries, but there are still several difficulties in popularizing lithium batteries:
(1) Price. The cost of batteries accounts for more than half of electric vehicles. The latest Tesla cars cost more than 700,000 yuan, which ordinary people can't afford.
(2) Energy density. The theoretical specific capacity of the lithium iron phosphate battery is 170 wh/kg, and the theoretical specific capacity of the lithium cobaltate battery is 200 wh/kg. Therefore, most of the load on a lithium battery is spent on the weight of the battery.
(3) Security.
(4) Charging time. The fast charge mode can be filled with 80% in a few minutes, but the battery damage is relatively large and there is a certain danger. Slow charging takes several hours to ten hours. Manufacturers generally recommend using the slow charge mode.
2, super capacitor
According to reports, "supercapacitors are expected to replace batteries" has no reliable basis. Although the energy density of supercapacitors will increase significantly after the introduction of graphite thinning, it is still far lower than lithium batteries, and the energy density of supercapacitors is 74 wh/kg. However, the advantage of supercapacitors is that the charging time is very short (several seconds) and safe, and can be used for auxiliary peak shaving and brake energy storage of electric vehicles.
3. Hydrogen-powered cars
Hydrogen-powered car technology has made great progress in recent years, with the advantages of short inflation time and strong power. But the problem that is currently being solved is
(1) Production cost of hydrogen
(2) Safe and high-strength hydrogen storage tank
(3) Security
(4) The price of inflatable equipment. Among them, the issue of security is especially important. In addition, whether the hydrogen production process is environmentally friendly is also controversial.
4, flow battery
The current flow battery mainly has zinc bromine flow battery and all vanadium flow battery. The cost price of zinc bromine flow battery is only about 1/5 of that of all vanadium flow battery, which has natural advantages.
(1) Price. The cost of a zinc-bromine flow battery is now close to that of a lead-acid battery, and in theory it can be lower in the future. Only about 1/5 of the lithium battery.
(2) Energy density. The energy density can reach 430Wh/kg. Travel distance is longer.
(3) Security. very safe.
(4) Charging time. Can be very short, fast charging mode does not damage the battery.
(5) In addition, there are other advantages such as long life, 100% deep discharge, no self-discharge, super high power, instant charging, and almost no requirement for working environment.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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