For the power batteries currently installed in pure electric vehicles, most use ternary lithium batteries, and some models use lithium iron phosphate batteries. Compared with these two batteries, ternary lithium batteries have higher energy density, which can improve the cruising range of pure electric vehicles to a certain extent. So in the long term, will lithium iron phosphate batteries be gradually eliminated? Wenqing believes that it will not be eliminated in the short term due to the following reasons:
Longer lifespan
Although lithium iron phosphate batteries have lower energy density than that of ternary lithium batteries, but it also has its own advantages, including longer life. According to data, the current ternary lithium battery can be used about 1,000 times when fully charged.old and discharged, while the lithium iron phosphate battery can be used about 2,000 times.
Lower production costs
Compared to ternary lithium batteries, lithium iron phosphate batteries are cheaper in the production process. The cathode material of ternary lithium battery uses lithium-nickel-cobalt manganate or lithium-nickel-cobalt aluminate. Metallic cobalt is a rare metal and one of the most expensive metallic materials among automobile battery materials. According to data, on February 18, the national benchmark price of metallic cobalt was 277,500 yuan/ton. There is no fixed cobalt gold in lithium iron phosphate batteries, so the cost is lower during the production process.
Technology is constantly advancing
Although the energy density of ternary lithium batteries is higher than that of lithium iron phosphate batteries, the technological improvement of lithium iron phosphate batteries has not stopped. For example, the blade battery launched by BYD can reduce production costs to a certain extent while increasing energy density. Furthermore, CATL has also developed CTP technology with a density close to 200Wh/kg, which is not very different from the energy density provided by ternary lithium batteries.
Written at the end
This is precisely because lithium iron phosphate batteries have a longer lifespan, lower production costs, and related technologies are constantly advancing that their energy density has become the same as that of ternary lithium batteries. The batteries are not much different, so lithium iron phosphate batteries will not be phased out in the near term. I wonder what everyone is thinking?
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This article comes from the author of Autohome Chejiahao and does not represent the views and positions of Autohome.
I want to use lithium batteries to replace eight AA dry batteries, is this possible? How much weight can be reduced? Thanks
Excuse me, does vanadium battery refer to an all-vanadium flow battery or a lithium-ion battery using a vanadium positive electrode?
Vanadium flow batteries have three main advantages over lithium batteries:
First, they are easy to scale. A system can be as large as your freezer or as large as your community substation, with enough power to last a day to a year in your home. You can design it however you want.
2. Long life expectancy. Might as well use it for half a century.
3. Better security. He has no pressure to face the courtshigh nts, overcharges and overdischarges which are taboo in lithium-ion batteries, and it will not explode at all.
The main problem is one:
Low energy density. Don't even think about using it on cell phones. There is no hope for electric vehicles.
If this problem is not resolved, it will be impossible to replace lithium batteries in the future.
This is not a good replacement. If 8 dry batteries are connected in series, the voltage is 8*1.5 = 12V, and the 5th size battery has a power of about 1500mah.
It is actually not good to use lithium batteries instead, because the voltage cannot be matched. You need to know the input voltage range that the internal circuitry of the device you are using can tolerate, or use another device. circuits for voltage conversion. The full voltage of the lithium battery is 4.2V and the voltage nominal is 3.7 V. Calculated based on 4 V power (about 80% at present), three parts are required at full voltage, the series voltage is 12.6 V, which is acceptable for general equipment. Most laptop batteries have this specification, so just use them.
The other 8 sections are not necessarily connected in series. You have to look carefully. Maybe they are connected in parallel after 4 sets. (4+4)6V requires the cooperation of peripheral circuits.
For DIY, it is recommended to first understand the specifications, voltage and power parameters of different batteries. Additionally, lithium batteries are dangerous and require protective plates, and they should be used with caution. It is not recommended to purchase batteries in bulk. It is safer to use laptop batteries directly.
LThe weight cannot be reduced much. The battery of the laptop can be estimated at 4000mah which is roughly equivalent to a few 8-bit batteries.