Source: Little connoisseur on electric bikes
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How is the performance of an electric vehicle, I think the proportion of batteries accounts for at least 60%, which shows the importance of electric vehicle batteries, and at present, high-end models are generally equipped with graphene batteries and lithium batteries, and sodium batteries, which have been very hot in the past two years, have not yet been popularized, so, do you know?
What are the characteristics of a family electric vehicle
Why talk about household electric vehicles, because the vast majority of electric vehicle users, the use of electric vehicles is daily household use, such as commuting, shopping for groceries, picking up babies, etc., and household electric vehicles I think the most important has two characteristics:
The first is that the price is not too high, and the price of household electric vehicles is 2000 yuan ~ 4000 yuan for the mainstream.
The second is that the configuration requirements will not be too high, and the household electric vehicles are short-distance, and there are no too high requirements for speed, power, and battery life.
Combined with these two characteristics of household electric vehicles, let's talk about whether it is better to choose graphene batteries or lithium batteries for household electric vehicles.
Whether to choose graphene or lithium battery for household electric vehicles, after comparing 5 aspects, I have a clear idea
Different types of batteries must have their own advantages, otherwise they will not appear in the electric vehicle market, then, graphene batteries and lithium batteries, which advantage is more obvious, we compare from 5 aspects, and the answer is also known.
1. Cycle charge and discharge life
The battery has a physical life and a recyclable charge and discharge life, the physical life depends on the habits of the car, it can be compared with the recyclable charge and discharge life, it is theoretical, the big brand of high-quality graphene batteries, the number of cycle charge and discharge is 700~1000 times, lithium battery 1000-1500 times, in this regard, lithium batteries have more advantages.
2. The price of the sale
In terms of price, the difference between graphene battery and lithium battery is very obvious, small connoisseurs find 48V20AH specification batteries, of which the price of graphene batteries is about 600 yuan, and the price of lithium batteries is about 1300 yuan, graphene batteries have the advantage of crushing.
3. Low temperature resistance in winter
Lithium battery has very good cold resistance, a high-quality lithium battery, can achieve -20 °C discharge capacity of more than 90%, and the normal working temperature of graphene battery is -20 °C to 60 °C, so, in terms of low temperature resistance, the two are equal.
4. Safety
Battery safety is a special concern of car owners, especially household electric vehicles, more attention to safety, theoretically speaking, the safety of graphene batteries > lithium batteries, because the main material of graphene batteries is still lead plate, without flammability.
5. Endurance
At the same capacity, the higher the energy density, the better the lightness of the battery, which can theoretically run farther, and the energy density, lithium batteries are 160 ~ 200 Wh/kg, graphene batteries are 80-120 Wh/kg, and lithium batteries perform better.
As can be seen from the above, graphene batteries and lithium batteries have their own advantages, but combined with the characteristics of household electric vehicles, the opinion of small experts is that household batteries are more suitable for graphene batteries, first of all, cheap, secondly, safety, these 2 points are enough.
First of all, I think sodium batteries are worth looking forward to, because sodium batteries are higher than graphene batteries in terms of energy density, life, battery life, and safety, and in terms of price, they will be lower than lithium batteries, and as its popularity becomes higher, there will be surprises in price.
However, if you want to say whether to wait, if you are a 48V electric vehicle, you can wait, as early as 2023, including Yadea, Tailing, Xinri and other brands have launched 48V sodium batteries, although it is not easy to buy at this stage, but in 2024, as the market rolls out, it will be easier for car owners to buy.
However, if it is a 60V or 72V electric vehicle, these batteries will not necessarily be popular in 2024 or even in the last two years due to the fact that they are a niche market, so it is not recommended to wait for small connoisseurs.
So, graphene battery, lithium battery, sodium battery, which one will you choose?