Lead-acid batteries
"Lead-acid batteries are safe. According to the internal structure of the battery, the larger the capacity of the lithium battery, the more heat dissipation is poor, which means it is prone to spontaneous combustion or explosion, while lead acid batteries are made of lead plates. Their capacity is not as good as that of acid batteries. lithium, but their performance is relatively stable and they are less likely to ignite or explode spontaneously, so they are safer. Electrodes are mainly made of lead and its oxides, and the electrolyte is a solution of sulfuric acid. In the discharged state of a lead-acid battery, the main component of the positive electrode is lead dioxide and lead. main component of the negative electrode is lead in the charged state, com;main constituents of the positive and negative electrodes are both lead; sulfate.
Which is better, a lead-acid battery or a lithium battery for electric vehicles?
The difference between lead-acid batteries and lithium batteries for electric vehicles is as follows -
1 Different concepts
Lead-acid batteries ( VRLA) are The first electrode mainly consists of lead and its oxide, and the electrolyte is a battery in sulfuric acid solution.
Lithium battery is a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses non-aqueous electrolyte solution.
2. Different durability
Lead-acid batteries are generally deeply charged and discharged within 300 times, have memory, and have a lifespan of about two years. And there is liquid in the lead acid battery. After a periodconsumption, the liquid needs to be replenished;
Lithium batteries have strong durability, slow consumption, can be charged and discharged more than 500 times. and have no memory. The general lifespan is 4 to 5 years.
3. Different volume and quality
Typically, lead acid batteries weigh between 16 and 30 kg and are larger
Lithium batteries generally weigh between 2.5 and 3000 kg. 3 kilograms, the volume is relatively small.
4. Different prices and warranty periods
Lead-acid batteries cost around 450 yuan and the warranty period is 1 year
Lithium batteries are relatively expensive and; require It costs about 1,000 yuan, but the warranty period is two years.
5. Different battery capacities
The capacity of lead acid battery is about 20 amps; Lithium battery capacity is 8-10 amps.
6. Protection of theenvironment is different
Lead-acid batteries contain pollution during the production process and can cause pollution if improperly recycled.
Lithium batteries are relatively polluting; green and environmentally friendly.
Baidu Encyclopedia - Lithium Battery
Baidu Encyclopedia - Lead Acid Battery
Hello, car batteries do not use lead acid batteries lithium for the following reasons:
1. Lead acid batteries are safer and more stable than lithium ion batteries tend to form lithium crystals on the negative electrode when discharged at high currents, which can pierce the diaphragm and cause damage . the battery could short circuit and explode. The particularity of automobiles makes the selection of batteries with high safety and stability the first consideration. Since the batterieslead acid batteries are resistant to low temperatures, the discharge performance of lithium-ion batteries is attenuated at low temperatures. They will run out quickly at minus 10 degrees Celsius. Lead-acid batteries can start a car at minus 50 degrees. Celsius. At this point, lithium batteries are difficult to manufacture.
2. Since the battery uses lead-calcium alloy as the grid, the amount of water decomposed during charging is small, and the amount of water evaporation is also small. In addition, the case adopts a sealed structure. , and the sulfuric acid gas released is also very small, so compared with traditional batteries, it has the advantage of no need to add liquid. Rated battery life is 27 months. Generally, family cars are relatively economical. Many new car batteries last 3 to 4 years. However, after replacement, they must generallyshould be replaced after approximately 2 years. Taxis are relatively expensive and a single bus lasts around a year, while a double bus lasts around 8-10 months. Several factors that affect battery life are: vehicle condition, road conditions and driver habits. The newer the car, the more it saves battery, because the engine is easy to use, saves battery, the generator is easy to use, and the battery can be fully charged when the car gets old, especially after the two big engines. and generators are replaced, due to the differences between these two products on the market. There is a huge price difference between original products and refurbished products, so it is easy for car owners not to replace the original parts, and then the battery will be more likely to break.
3. Cost. The price of conventional lithium batteriesis 2 to 3 times higher than that of lead acid batteries. Therefore, under the business requirement of "maximizing profits" and without external motivation such as market or law, automobile manufacturers have no motivation to replace lead-acid batteries. with lithium batteries.
4. Technology. Upon their commercialization, lithium batteries first entered the digital domain, and then gradually entered the fields of energy applications such as electric vehicles. Starting a car requires relatively high battery performance, which must be provided by a high-rate lithium-ion battery. Lithium batteries themselves also have a technological maturity process, and power batteries have also matured in recent years.