1. Is the battery of electric vehicle a dry battery or a lithium battery?
Dry batteries are generally lead-acid batteries. With the same capacity and voltage, the weight of lead-acid battery is three times that of lithium battery. Lead-acid batteries also have a short life. Current lead-acid batteries can’t go far in two years, while lithium batteries can last for five years. Due to its own weight, the battery life is incomparable to that of lithium batteries. But dry batteries are cheaper. It depends on how you choose. What suits you is a good lithium battery electric car: advantages: high efficiency. The car body is light, the mileage is long, and the requirements for the use and maintenance of users are not strict. Disadvantages: the price is high, and the domestic lithium battery technology is uneven, and the lithium battery used for electric vehicles has potential safety hazards. Lead-acid battery electric vehicle: advantages: high cost performance. The battery is relatively cheap, with large capacity, many battery brands and mature technology. Disadvantages: the efficiency is not very high. The battery pack is bulky, resulting in a heavy body and short mileage, so it is necessary to maintain the battery regularly.
2. Is dry battery or lead-acid battery better for electric vehicles?
Electric bicycles and motorcycles have become important means of transportation in large, medium and small cities and are generally accepted by people. Compared with traditional bicycles, the price of electric bicycles is generally higher, so the service life has become the most concerned issue. In fact, the battery is one of the core components of the electric bicycle, and the service life of the battery largely determines the service life of the electric bicycle. In this regard, Chaowei Battery said that strengthening the maintenance of the battery will extend the service life of the battery. It is understood that the batteries used in electric vehicles are lead-acid batteries! Dry batteries are a scam! In addition, I will send you a message: the starting current of electric vehicles is very large, especially for electric motorcycles with high-power motors. Heavy current will damage the battery plate. The best way is to start the power supply after riding the electric car like riding a bicycle. After the battery is used for a period of time, some active substances will inevitably settle. If the active substance is not activated in time, it will definitely affect the capacity of the battery. Deep discharge the battery once. Judging from the current use of electric vehicle batteries, lead-acid batteries are mature in technology, cheap in price and stable in performance. The dry battery of electric vehicle is mainly lithium battery, which is twice as expensive as lead-acid battery, but its service life is longer than that of lead-acid battery, but with the increase of charging times, its service life will become shorter and shorter. For example, lead-acid batteries need to be replaced once a year, and lithium batteries can be replaced once every two years, but lead-acid batteries can be replaced once a year, and the cruising range of lithium batteries will be shortened in the second year, which will affect their use.Compare their respective prices, calculate the cost and your own usage, and see which is more cost-effective. I recommend lead-acid batteries. Dry batteries are easy to use, durable and small in size, but the price is a bit expensive. It is the future development. Lead-acid batteries will be out of stock. Use lead-acid batteries. The storage capacity is stronger. If you ride it every day, you’d better charge it every day. I know a lot of fake batteries, so it’s unnecessary, right?
3. Is lithium battery for electric vehicle really better than lead-acid battery?
Lead-acid batteries have the largest number. Lead-acid batteries are the cheapest and most commonly used. China is the largest producer of lead-acid batteries in the world. It contains less pollution components and has good recyclability. The disadvantage is that the specific volume is small. In other words, under the same capacity, the weight and volume of the battery are very large. At present, lead-acid batteries are basically developed from floating batteries. Floating battery is not suitable for fast charge and high current discharge. Although technicians have spent a lot of energy on effective improvement and can put it into practical use, its service life is still very long. Colloidal batteries belong to a development category of lead-acid batteries. The simplest method is to add gelling agent to sulfuric acid, so that sulfuric acid can be electrically liquefied into colloidal state. The battery with electro-hydraulic colloid state is usually called colloid battery. In a broad sense, the difference between colloidal battery and traditional lead-acid battery is not only that electro-hydraulic battery is changed into colloid. For example, non-condensed hydrocolloids belong to colloidal batteries in electrochemical classification structure and characteristics. Another example is that polymer materials are attached to the grid, commonly known as ceramic grid, which can also be regarded as the application characteristics of colloidal batteries. Recently, some laboratories have added targeted coupling agents to the polar plate formula, which greatly improved the reaction utilization rate of the polar plate active materials. According to unpublished data, its weight ratio can reach 70wh/kg. These are the current industrial practice and the application examples of colloidal batteries that will be industrialized soon. The difference between colloidal batteries and conventional lead-acid batteries is that from the initial understanding of electrolyte gelation to the study of electrochemical characteristics of electrolyte basic structure,Then to the application and promotion of grid and active materials. Its most important feature is to manufacture better batteries along the road of lead-acid battery industry for 150 years with relatively small industrial cost. Its discharge curve is flat and its inflection point is high, and its specific energy is 20 times larger than that of conventional lead-acid batteries. The battery of electric vehicle must choose lithium battery. Lead-acid batteries used in traditional electric vehicle batteries will produce a lot of pollution and lead vapor after being discarded. According to statistics, a batch of waste batteries of electric vehicles will pollute tens of thousands of tons of water. Lead is not easy to be excreted, and it can also cause diseases such as metabolism, reproduction and nerves. Once the lead content in the human body exceeds the standard, it will lead to mental decline, fetal malformation, and it is easy to induce malignant tumors in children and even lead to death. Compared with lead-acid batteries, lithium batteries have natural advantages in environmental protection. The materials used for lithium batteries do not contain harmful heavy metals such as cadmium, lead and mercury. In the process of production and use, lithium batteries do not produce any pollutants, which ensures human health. Solved the problems of water source and soil. In addition, lithium batteries also have the advantages of large specific energy, long cycle life, low self-discharge rate and no memory effect. The storage energy density of lithium batteries is high, which has reached 460-600wh/kg at present, which is about 6-7 times that of lead-acid batteries. The service life can reach more than 6 years, and the anode lithium iron phosphate battery can charge and discharge 1cdo. Can be used for 10,000 times; It has high power tolerance, and the Ferrous lithium phosphate lithium-ion battery used in electric vehicles can realize the charge and discharge capacity of 15-30c, which is convenient for high-intensity start acceleration;The self-discharge rate is extremely low, which is generally lower than 1% per month at present, less than 1/20 of that of Ni-MH battery; Lithium battery can completely meet the power requirements of electric vehicle batteries, and become an ideal product for electric vehicle applications because of its green and environmental protection characteristics. I hope it will help you.
4. Why are the batteries of electric vehicles all lead-acid batteries?
Of course not, because lead-acid batteries have the following characteristics and advantages: sealed structure, no acid leakage and no acid mist emission. One-way exhaust valve (also called safety valve), the function of this valve is that when the amount of gas inside the battery exceeds a certain value (usually expressed by air pressure value), that is, when the air pressure inside the battery rises to a certain value, the exhaust valve automatically opens, discharges gas, and then automatically closes the valve to prevent air from entering the battery. Compared with ordinary lead-acid batteries used in automobiles, valve-regulated lead-acid batteries have two main characteristics: one is sealing; The second is dry. Sealing means that there is basically no acid mist discharged. Generally, the VRLA battery is "zero emission" during its operation (charging and discharging), and only when the gas pressure in the battery exceeds the opening pressure of the safety valve in the later period of charging can a small amount of mixed gas of hydrogen and oxygen be discharged, and at this time, a small amount of acid mist is filtered out by a filter material. Dry state means that the VRLA battery has no free flowing electrolyte, and can be placed in any direction, not afraid of bumps and collisions, and no acid will leak out even if the shell is broken. During the use of lead-acid batteries, chemical energy is only continuously converted into electrical energy, and electrical energy is also converted into chemical energy, which is repeatedly circulated, thus causing "zero emission" to the external environment and no pollution to the environment, which you do not have with 40 No.5 batteries. 1. Electric vehicle batteries are not all lead-acid. Now there are many lithium-ion electric vehicle batteries, and most of them are composed of many small batteries. The adoption of lead-acid batteries is the result of many considerations such as production difficulty, cost and reliability.2. The basic feature of lead-acid battery is that it does not need to be maintained by adding acid and water during use. The battery has a sealed structure, which will not leak acid or discharge acid mist. The battery cover is equipped with a one-way exhaust valve (also called a safety valve), which is used to prevent air from entering the battery when the gas volume inside the battery exceeds a certain value (usually expressed by air pressure value), that is, when the air pressure inside the battery rises to a certain value, the exhaust valve will automatically open, exhaust gas and then automatically close the valve to prevent air from entering the battery. 3. Compared with ordinary lead-acid batteries used in automobiles, VRLA batteries have two main characteristics: one is sealing; The second is dry. 4. Sealing means basically no acid mist is discharged. Generally, the VRLA battery is "zero emission" during its operation (charging and discharging), and only when the gas pressure in the battery exceeds the opening pressure of the safety valve in the later period of charging can a small amount of mixed gas of hydrogen and oxygen be discharged, and at this time, a small amount of acid mist is filtered out by a filter material. 5. Dry state means that the VRLA battery has no free flowing electrolyte, and can be placed in any direction, without fear of bumps and collisions, and even if the shell is broken, there will be no acid leakage. 6. During the use of lead-acid batteries, chemical energy is only continuously converted into electrical energy, and electrical energy is also converted into chemical energy, which is "zero emission" to the external environment and will not cause pollution to the environment. One reason: cheap. If you change to a lithium battery, the battery will cost thousands ~ now it mainly depends on lead acid to store electricity and generate electricity, and there is no better material to replace it. Besides, this cost is low, which is suitable for the needs first! Not all batteries of electric vehicles are lead-acid.Now there are many lithium-ion electric vehicle batteries. Lithium-ion electric vehicle batteries. Most of them are also composed of many small batteries. The adoption of lead-acid batteries is the result of many considerations such as production difficulty, cost and reliability. Your scheme is feasible in theory, but just accumulating one item based on the quality difference between batteries makes your scheme useless. Not to mention cost and reliability.
5. What kinds of batteries are available for pure electric vehicles? There are two types of batteries for electric vehicles, storage batteries and fuel cells. Batteries are suitable for pure electric vehicles, including lead-acid batteries, nickel-cadmium batteries, nickel-hydrogen batteries, sodium-sulfur batteries, secondary lithium batteries and air batteries. Among them, lead-acid batteries, nickel-cadmium batteries and nickel-hydrogen batteries appeared earlier, and they are also the types of batteries that have been generally eliminated. Nowadays, the mainstream pure electric vehicles are basically lithium batteries, mainly including lithium cobalt oxide batteries, such as products; Lithium manganate batteries, such as (||) and Leaf Wind; Lithium iron phosphate batteries, such as products, (||), etc. Lead-acid battery is the most commonly used new energy vehicle battery. The polar plate of lead-acid battery is a grid made of lead alloy, the electrolyte is dilute sulfuric acid, and both polar plates are covered with lead sulfate. However, after charging, the lead sulfate on the electrode plate at the positive electrode is converted into lead dioxide, and the lead sulfate at the negative electrode is converted into metallic lead. When discharging, the chemical reaction in the opposite direction occurs. The advantage of lead-acid battery is that the electromotive force is stable when discharging, but the disadvantage is that the specific energy is small and it is corrosive to the environment. 1. There are two main types of batteries for electric vehicles, battery and fuel cell. Batteries are suitable for pure electric vehicles, including lead-acid batteries, nickel-cadmium batteries, nickel-hydrogen batteries, sodium-sulfur batteries, secondary lithium batteries and air batteries. 2. Among them, lead-acid batteries, nickel-cadmium batteries and nickel-hydrogen batteries appeared earlier, and they are also battery types that have been generally eliminated. Nowadays, the mainstream pure electric vehicles are basically lithium batteries, mainly including lithium cobalt batteries, such as Tesla products;Lithium manganate batteries, such as Toyota Prius and Nissan Leaf; Lithium iron phosphate batteries, such as BYD products, 1E, etc. 3. Lead-acid battery is the most commonly used battery for new energy vehicles. The polar plate of lead-acid battery is a grid made of lead alloy, the electrolyte is dilute sulfuric acid, and both polar plates are covered with lead sulfate. However, after charging, lead sulfate on the electrode plate at the positive electrode is converted into lead dioxide. 4. Lead sulfate at the negative electrode is converted into metallic lead. When discharging, the chemical reaction in the opposite direction occurs. The advantage of lead-acid battery is that the electromotive force is stable when discharging, but the disadvantage is that the specific energy is small and it is corrosive to the environment. For the time being, there are only experimental products for sodium-sulfur batteries for vehicles. 1. There are many kinds of fuel cells, such as hydrogen fuel cells, high-temperature fuel cells, direct methanol fuel cells, methanol reforming hydrogen fuel cells, metal fuel cells and so on. 2. At present, hydrogen fuel cells are the mainstream in the field of passenger cars, and Toyota is the representative factory. The biggest feature is that it can achieve pollution-free throughout the life cycle (from the beginning of raw material manufacturing to the final recycling). 3. The fuel hydrogen used has the characteristics of high energy density and zero pollution. The disadvantage is that the current cost is very high, and the volume power density is limited. Take the representative of the fuel cell vehicle (||) as an example, the volume of the fuel cell system of NO is roughly equivalent to a V6 engine, but the output power is only in the early 100KW, which is about 140 horsepower. The price of the whole vehicle is roughly equivalent to 338 horsepower. In fact, these two kinds of batteries can be said to have their own advantages. At present, lithium iron phosphate batteries are used a little more, because Ferrous lithium phosphate has good cycle stability.The cost is also relatively low. However, the consistency of Ferrous lithium phosphate is not as good as that of ternary battery, and there are still many problems in material stability, safety and processing technology. The specific landlord can check again, and the relevant information is still quite a lot. Personally, I recommend ternary batteries. At present, Ferrous lithium phosphate and ternary batteries are the main ones, and lithium manganate can be ignored. Take our car as an example. ev160 uses lithium iron phosphate battery, which is ternary lithium battery. Ferrous lithium phosphate’s technology is more perfect, but its future development is not as good as ternary lithium. I bought ev160, so I recommend Ferrous lithium phosphate, and I will buy ternary lithium car when ternary lithium technology is mature. Land Ark brought its newly listed pure electric vehicle v5s at the 2015 Energy Saving and New Energy Auto Show. The car was launched on October 15th, 2015, and it is the upgraded version of the first pure electric v5 launched by Land Ark in 2013. According to the staff, the car has a battery life of 150 kilometers and the price is about 75,000 yuan. Compared with lithium iron phosphate battery, ternary lithium battery has several improvements: power increase, energy density increase, charging rate increase, good low-temperature performance, and battery cells are combined and packaged. But lithium ternary is more unstable than Ferrous lithium phosphate, so the good and bad are 50% and 50% respectively.