What is lead-acid battery

　　In fact, to answer this question, we first need to know what a lead-acid battery is. In fact, lead-acid battery is a kind of electrode, which is mainly composed of lead and its oxides. Its electrolyte is sulfuric acid solution. The main component of the positive electrode is PbO2, and the main component of the negative electrode is lead. Like lithium batteries, lead-acid batteries are also seriously affected by temperature. In fact, to answer this question, we first need to know what a lead-acid battery is. In fact, lead-acid battery is a kind of electrode, which is mainly composed of lead and its oxides. Its electrolyte is sulfuric acid solution. The main component of the positive electrode is PbO2, and the main component of the negative electrode is lead. Like lithium batteries, lead-acid batteries are also seriously affected by temperature. The service life of lead-acid battery is extended with the increase of temperature, but when the temperature is higher than 50 ℃, the service life of lead-acid battery is gradually reduced. In addition, it should be noted that the nominal voltage of single core lead-acid battery is 2.0V. In common applications, single lead-acid batteries can be connected in series, such as 12V, 24V or 36V lead-acid batteries.

　　However, compared with lithium battery, lead-acid battery has lower energy density and shorter service life. At present, the energy density of lithium battery is generally 200~260whg, and that of lead-acid battery is generally 50~70whg. For new energy vehicles, especially pure electric vehicles, the energy density will affect the vehicle mileage to a certain extent. Therefore, from this perspective, lithium batteries are more cost-effective. From the perspective of service life, the number of charging and discharging cycles of lithium battery is about 1000, among which the number of charging and discharging cycles of lithium iron phosphate battery can reach about 2000. The service life of lead-acid battery is short, and the number of full discharge cycles is about 300~350. Therefore, in terms of service life, lithium batteries are also longer than lead-acid batteries. Conclusion: It is precisely because lithium batteries have more advantages in energy density and service life that new energy vehicles use lithium batteries with higher cost performance ratio. At present, in addition to using ternary lithium batteries and lithium iron phosphate batteries, many automobile manufacturers and battery manufacturers have begun to research solid state lithium batteries. It is believed that with the development of technology, this kind of battery will also be used in automobiles.

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