What is the lifespan of new energy vehicle batteries?
1 Answers
The lifespan of new energy vehicle batteries is generally around eight years. Therefore, it is advisable to consider replacing the battery after approximately eight years. Battery classifications: Lead-acid batteries: The lifespan of lead-acid batteries is typically 1.5-2 years. A lead-acid battery is a type of battery where the electrodes are primarily made of lead and its oxides, with the electrolyte being a sulfuric acid solution. In the discharged state, the positive electrode of a lead-acid battery mainly consists of lead dioxide, while the negative electrode primarily consists of lead. In the charged state, the main component of both the positive and negative electrodes is lead sulfate. Nickel-metal hydride (NiMH) batteries: NiMH batteries can store twice as much energy per unit weight compared to lead-acid batteries, and their other performance metrics are also superior to lead-acid batteries. However, they cost 4-5 times more than lead-acid batteries. NiMH batteries are charged using a constant current charging method, allowing for different charging currents based on the battery's current acceptance capability. During the charging process, there is no need to limit the voltage of individual battery cells, and fast charging can be achieved. Lithium iron phosphate (LiFePO4) batteries: LiFePO4 batteries refer to lithium-ion batteries that use lithium iron phosphate as the cathode material. The cathode materials for lithium-ion batteries mainly include lithium cobalt oxide, lithium manganese oxide, lithium nickel oxide, ternary materials, and lithium iron phosphate, among others. Currently, lithium cobalt oxide is the cathode material used in the vast majority of lithium-ion batteries. The theoretical lifespan of LiFePO4 power batteries is 7-8 years.
