source:Industry News
release time:2023-03-28
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Weight energy density
The current lithium battery energy density is generally 200 ~ 260WH/g, and lead acid is generally 50 ~ 70Wh/g. Then the weight energy density density lithium battery is 3 to 5 times that of lead acid, which means that under the same capacity, lead, lead, lead, lead, lead, lead, lead, lead, lead The acid battery is 3 to 5 times that of lithium batteries, so lithium battery occupies an absolute advantage in the lightweight energy storage device.
Volume energy density
The volume capacity density of lithium batteries is usually about 1.5 times that of lead -acid batteries, so under the same capacity, lithium batteries are about 30%smaller than lead -acid batteries.
Use cycle
At present, the more popular material system is ternary and iron lithium. The number of cycles of ternary dynamic lithium batteries is usually more than 1,000 times, the number of lithium iron phosphate batteries is more than 2,000 times, and the number of lead -acid batteries is usually only 300 ~ 350 350 About the second, so the service life of the lithium battery is about 3-6 times that of lead-acid batteries. Lithium batteries are durable, slow, and more than 500 times, and there is no memory. The general life span is 4-5 years. Lead -acid batteries are generally within 400 deep discharge of deep discharge, with memory and life span of about two years.
price
At present, lithium batteries are more expensive than lead acid in terms of price, about 3 times, but combined with service life analysis and invested the same cost, the use cycle of lithium batteries is still longer. For example, the current mainstream battery in the market is 48 volts. If it is necessary to replace it, the lead -acid battery is around 450, and the warranty period is 1 year; the price of lithium batteries is relatively expensive and it takes about 1,000 yuan, but its warranty period is 2 years.
applicability
Lithium batteries are slightly worse than lead -acid batteries, so they need to do a good job of various security prevention work in use, such as preventing external forces or accidents that cause damage to lithium batteries, because this may cause fire or explosion; currently lithium batteries are currently lithium batteries; The temperature applicability is also very good, so in terms of other adaptability, lithium batteries are not inferior to lead -acid batteries.
Use occasion
Lead -acid battery: car start, electric vehicle battery,
Lithium batteries: mobile phones, computers, electric tools, are now used for electric vehicle batteries.
Internal materials
Lead -acid batteries positive and negative extremely leading lead, metal lead, and electrolyte are concentrated sulfuric acid.
Lithium batteries are positive and negative, lithium cobaltate/lithium iron phosphate/lithium manganate, graphite, and organic electrolyte.
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