First, in terms of battery prices, lithium batteries are more expensive than lead-acid batteries.
For example, a set of lead-acid batteries on the market now costs between four and five hundred yuan, while lithium batteries of the same energy generally cost more than a thousand yuan. a lithium iron phosphate battery is even more expensive. Therefore, in terms of price, lithium batteries generally cost twice or more than lead-acid batteries.
Second, in terms of battery capacity, lithium batteries of the same size have more capacity.
Because the average voltage of lithium batteries is higher than that of lead-acid batteries, that is, the energy density is high, so for batteries of the same volume , lithium batteries have greater capacity.
Regarding the same lithium battery, the capacitytee of ternary lithium battery is higher than that of lithium iron phosphate battery, and the capacity of lithium iron phosphate battery is higher than that of lithium manganate battery.
Third, in terms of battery weight, lithium batteries of the same volume are lighter than lead-acid batteries.
This means that the energy density of lithium batteries is greater. For example, the energy of one kilogram of lithium batteries is equivalent to the energy of three to five kilograms of lead-acid batteries. therefore the same energy. Then, lead-acid batteries are heavier.
So if we want to be more convenient and lighter to twist, we can choose lithium batteries.
Fourth, in terms of battery safety, lead-acid batteries are safer.
The main component of lead-acid batteries is water, there is no organic electrolytenic and explosions or fires are rare.
However, lithium batteries have a certain sealed space and contain organic materials if used improperly, explosions and fires may occur.
Fifth, in terms of battery life, lithium batteries are about three times longer than lead-acid batteries.
The standard for this judgment is that for the same quality, the number of cycles of lithium batteries is about 1,000 times, and that of lead acid batteries is about 300 times. times. if you use lead acid battery, you need to recharge it after 300 times charging, the battery will basically enter the aging stage, so the lifespan of lithium batteries will be longer.
How much does a 60 volt, 20 amp battery cost?
Are graphene batteries for electric vehicles durable?
batteries to graphene for sustainable electric vehicles? With the changing times, more and more people are now interested in environmental protection issues, and environmentally friendly vehicles such as electric vehicles have appeared on the market. Choosing electric bikes to commute to work will definitely be very beneficial in reducing congestion on urban roads. So, are graphene batteries for electric vehicles sustainable?
Are graphene batteries for electric vehicles sustainable? 11. Are graphene batteries good
From a usage point of view, graphene batteries are fully capable of running on lithium? ionic batteries The role of batteries in electric vehicles, they have greater storage capacity and faster charging speeds, and are more durable at high temperaturesIt is ealso more durable than lithium batteries. Therefore, graphene batteries pose no problem as electric vehicle batteries.
Although graphene batteries are better than lithium batteries in many theoretical performance aspects, due to various factors, they still cannot replace lithium batteries in electric vehicles.
First of all, the cost of graphene batteries is extremely high. As a raw material, highly conductive graphene currently sells for up to 600 yuan per gram. Graphene batteries, known as "black gold", are mostly. used in aerospace and mobile applications. In equipment and other fields, human-friendly electric vehicles can only be disappointed.
Second, the manufacturing process of graphene batteries is not yetsufficiently mature. It is currently only in the laboratory stage and cannot reach mass production. It will be difficult to bring graphene batteries to the electric vehicle market. short to medium term.
2. Are graphene batteries durable
Durable graphene batteries are a type of battery developed by Ohio State University in the United States. Nanotek Instruments developed the device by taking advantage of the rapid and massive shuttling movement of lithium ions between the graphene surface and the electrodes.
The success of the experimental stage of the new graphene battery will undoubtedly become a new development point for the battery industry. Battery technology is the greatest threshold for vigorous promotion and development of electric vehicles, and the battery industry is at a stage where the development of batteries hasTraditional lead and lithium batteries have encountered bottlenecks after the successful development of graphene energy storage equipment. if it can be mass produced, it will be The battery industry and even the electric vehicle industry have brought new changes.
Are graphene batteries for electric vehicles sustainable? 2Is the graphene battery for Yadi electric vehicles good?
According to user testing, the experience of using Yadea graphene battery to drive a car is better than that of ordinary batteries. The most obvious difference is cruising range and charging time.
Charging time
Graphene itself has good conductivity and thermal conductivity, and is suitable for 10-20A high-power current input . In addition, the surfaceUltra-large specific can also increase the solid-liquid contact area, which promotes the construction of a conductive network structure, thereby improving the charging efficiency. Normally, it usually takes about 4 hours to fully charge the Yadi graphene battery. Although the time is not very short, it is already twice as fast as a regular battery.
Battery life
In winter, the discharge capacity of the battery becomes smaller, and ordinary batteries will run out after being used for a while. Graphene batteries have strong thermal stability. In low temperature environments, the battery can store 10% more electricity than ordinary batteries. In other words, when fully charged, graphene batteries last 10% longer than regular batteries.
The battsYadi graphene eries not durable?
At present, graphene is not used as the main material in Yadi batteries, but rather as an additive. According to its name "lead-graphene battery", graphene is only used to improve the performance of the battery to a certain extent.
Although there should be a gap between advertising and reality, graphene batteries are relatively durable compared to ordinary batteries. After all, graphene batteries use super conductive mud and are highly reversible with repeated charging and discharging. In addition, the battery case is made of composite materials with high and low temperature resistance, shock resistance, no leakage and strong stability, which not only better protects the battery, but also extends its service life. life.
Are graphene batteries for electric vehicles hardable? 31. Current status of electric vehicle power batteries
Electric vehicles currently mainly use three types of batteries, namely lithium iron phosphate batteries, lithium iron phosphate batteries, Ternary lithium and lithium manganate batteries, each of these three batteries has its own advantages and disadvantages.
Batteries can be divided into three categories: chemical batteries, physical batteries, and biological batteries. Both chemical batteries and physical batteries have been used in mass-produced electric vehicles, while biological batteries are considered one of the most important. development directions of electric vehicle batteries in the future.
Chemical batteries are currently the most widely used type of battery in the field of electric vehicles, such as nickel-metal hydride batteries, batteries lithium-ion, lithium-polymer batteries, fuel cells, etc. Among them, the most used in electric vehicles are lithium-ion batteries, which are often called lithium batteries. According to different battery cathode materials, lithium batteries can be divided into lithium iron phosphate batteries, ternary lithium batteries and lithium manganate batteries.
2. Analysis of electric vehicle batteries
1. Lithium manganate battery
The cost is relatively high, low cost and short battery life
Lithium manganate battery has a standard voltage of 3.7V and is widely used for its low cost and good safety. Lithium manganese oxide batteries have better safety performance and greater plug density. They can hold more materials in the same volume and have higher power. OfIn addition, manganese resources are abundant, and the manufacturing cost of lithium manganate batteries is also low, which can reduce car purchasing costs for consumers.
However, the shortcomings of lithium manganese batteries are also obvious. Its energy density is similar to that of lithium iron phosphate batteries, which has a certain impact on the vehicle's range. Compared with other lithium-ion materials, lithium-manganate batteries also have poor high temperature resistance, and their relative service life will also be affected.
Additionally, because manganese itself is unstable and breaks down easily to produce gas, it is often mixed with other materials to reduce battery core costs, but its lifespan life decreases rapidly. At the same time, instability can also make the battery itself prone to swelling.
2. Beatie lithium iron phosphate
The price is relatively lowCheap, difficult to charge below -5°C
Lithium iron phosphate batteries are safe and can remain stable at high temperatures below 390°C. They will not cause damage due to overload, excessive temperature, short circuit, etc. or impact. Explode or burn. In addition, the life of lithium iron phosphate batteries is also relatively long, and the theoretical life can reach 7-8 years. The thermal stability of lithium iron phosphate batteries is the best among current automobile lithium batteries. When the battery temperature reaches a high temperature of 500℃ to 600℃, its internal chemical components begin to decompose.
However, due to the material itself and technical reasons, the energy density of lithium iron phosphate is low. The energy density ofThe lithium iron phosphate battery system reached a maximum of more than 90 Wh/kg. but it is not as good as ternary lithium. The battery is still quite inferior, which has a certain impact on the vehicle's autonomy. Additionally, the capacity of lithium iron phosphate batteries is smaller. With the same battery capacity, lithium iron phosphate batteries are heavier and larger, which also affects their cruising range.
The performance of lithium iron phosphate batteries at low temperatures is also a problem for some current new energy car owners. In winter, direct charging is generally only allowed above -5°C, which cannot meet the needs. car owners in the North to charge at low temperatures in winter.
3. Ternary lithium battery
Light weight and excellent cruising range
p>Overall Generally speaking, ternary lithium batteries have the outstanding characteristic of high energy density. Therefore, with the same amount of electricity, the ternary battery system is lighter and smaller, so the vehicle's range can be significantly improved. In addition, ternary lithium batteries also have the advantages of good low temperature performance, high discharge rate, good consistency and easy SOC estimation.
Compared with lithium iron phosphate batteries, the energy density of ternary lithium batteries is much higher. The energy density of ternary battery systems can reach 105-120Wh/kg, which means that the energy density of these. weight Ternary lithium batteries have a longer runtime than lithium iron phosphate batteries; assuming they have the same powerThis, ternary lithium batteries are lighter and smaller.
Ternary lithium batteries have good resistance to low temperatures. In response to the needs of low temperature use in the North, BAIC New Energy has adopted custom-developed low temperature improved batteries. The electric battery system can enable direct charging at -20°C, which significantly reduces charging time in winter.
However, its flaws are also obvious. The thermal stability of ternary lithium batteries is not as good as that of iron phosphate batteries. When its own temperature reaches 250℃ - 350℃, the internal chemical components begin to degrade. break down. Therefore, extremely high demands are placed on the battery management system and a safety device must be installed for each battery, which will increase its economic cost. Furthermore, whenternary battery is internally short-circuited or the battery case is damaged, it is easy to cause safety accidents such as combustion and explosion. In addition, due to the nature of the ternary lithium battery material, the lifespan of the ternary lithium battery is relatively short.
3. Electric vehicle powerThe future of batteries
Graphene batteries
Today Today, electric vehicle development is focused on batteries, and battery manufacturers are working hard to make batteries lighter and smaller without reducing power reserves.
Biological batteries have always been considered as one of the important development directions of future electric vehicle batteries. In 2013, scientists discovered that the energy generated by the surface proteins of bacteriaries could be collected and used as electrical energy. However, due to technical constraints, the research and use of biofuel cells is still at an immature stage. The period of full promotion is far from being reached. Currently, scientists are working hard to apply biobatteries to electric vehicles as quickly as possible.
Compared to seemingly distant biological batteries, graphene batteries currently hold the most promise for changing the range of electric vehicles and even the entire automotive industry. Adding graphene to lithium batteries can help lithium batteries reduce heat during production, achieve the goal of reducing energy loss, and ultimately avoid the waste of a large quantity of energy. It can also reduce heat damage to the battery and increase battery life.e. .
The popularity of graphene batteries will be a quantum leap for electric vehicles. Once graphene batteries are applied to electric vehicles, it will be a disruptive change for the entire automobile industry. Currently, there are graphene industry demonstration bases in ZG Wuxi, Qingdao, Changzhou and other places, and scientists around the world are striving to mass produce graphene batteries as soon as possible.
Comparison between lithium manganese oxide battery and ternary lithium battery
If you use a lithium battery, consider using the price of the lithium battery lithium iron phosphate = total power * 1.8 yuan
For lead-acid batteries, price = total power * 0.8 yuan (approximately)
For example, if you have 60v20ah
Lithium battery price: 60*20*1.8 =2160 yuan
Lead acid battery price: 60*20*0.8=960 yuan
The above calculation method is for reference only. The price can be reduced
Materials and performance are displayed according to the demand of electronic enthusiasts.
1. Material comparison, lithium manganate battery, the positive electrode material is lithium manganate LiMn2O4, and the negative electrode material is graphite. Ternary lithium battery, the positive electrode material is ternary nickel-cobalt-manganese NMC material, NiMnCo, and the negative electrode material is graphite.
2. Comparison of performances, energy density. The energy density of ternary lithium batteries is generally higher than that of lithium manganate batteries, which means that under the same weight, ternary lithium batteries can store more energy. Lifetime. The lifespan of lithium-manganate batteries is generally long, reaching up tondre more than 3,000 times, while the life of ternary lithium batteries is relatively short, generally around 1,500 times. Thermal stability. Lithium-manganate batteries have poor thermal stability and are prone to thermal runaway. The thermal stability of ternary lithium batteries is relatively good, but it still requires a good thermal management system.