Lithium-ion battery manufacturers talk about the safety of lithium-ion battery electric vehicles and lead-acid battery electric vehicles

Lithium-ion battery manufacturers talk about the safety of lithium-ion battery electric vehicles and lead-acid battery electric vehicles. The safety of lithium-ion batteries and lead-acid batteries has always been a point of user controversy. In terms of battery structure, the current lithium-ion battery packs are basically 18650 batteries for packaging, while lead-acid batteries are basically also well-sealed. The risk factor of the two maintenance-free lead-acid batteries is basically the same. The following is a brief talk about the safety of lithium-ion battery electric vehicles and lead-acid battery electric vehicles from lithium-ion battery manufacturers. Lithium-ion battery manufacturers talk about the safety of lithium-ion battery electric vehicles and lead-acid batteries. Lithium-ion batteries are a type of battery that uses lithium metal or lithium alloy as the negative electrode material and uses a non-aqueous electrolyte solution. Due to the very active chemical properties of lithium metal, the production, storage and use of lithium metal have very high environmental requirements. Therefore, lithium-ion batteries have not been used for a long time. With the development of science and technology, lithium-ion batteries have become the mainstream at present. A lead-acid battery is a battery in which the electrodes are mainly made of lead and its oxides, and the electrolyte is a sulfuric acid solution. In the discharge state of a lead-acid battery, the important component of the positive electrode is lead dioxide, and the important component of the negative electrode is lead; in the charged state, the important components of the positive and negative electrodes are lead sulfate. At present, the most widely used electric bicycles on the market are lead-acid electric vehicles and lithium-ion electric vehicles. The vast majority of electric bicycles are equipped with lead-acid batteries. This is because lead-acid batteries are cheaper and more cost-effective than lithium-ion batteries. . However, due to the nature of lead-acid batteries, more and more consumers choose to use high-efficiency, energy-saving, and stable lithium-ion electric vehicles. Who is safer for lithium-ion battery electric vehicles or lead-acid battery electric vehicles? ①Lithium-ion batteries are equipped with safety valves, which can not only release excessive internal pressure but also physically disconnect the battery from the external circuit, which is equivalent to physically isolating the cell to ensure the safety of other cells in the battery pack. In addition, the lithium-ion battery pack is usually equipped with a bMS protection board, which can accurately control the state of each cell in the battery pack and directly deal with the problem of overcharge and overdischarge from the root cause. On the contrary, lead-acid batteries lack bMS system protection. In terms of safety protection, lead-acid batteries seem to be lackluster except for safety valves. BMS protection is almost non-existent. Many inferior chargers cannot even be powered off after overflow. Safety guarantee Ion batteries are a far cry. ②The lithium ion battery charger will catch fire if it is overcharged out of control. It cannot be soaked in water. If the lithium ion battery pack cannot get in or out, the battery pack will be discharged internally. The battery pack will be damaged if it is squeezed and impacted, it will short-circuit and explode and catch fire. The lead-acid battery charger is out of control. Overcharged batteries will swell at high temperature. The battery will fail. The battery will be scrapped but will not catch fire. Soaking in water for a short period of time can basically be ignored. It is easy to swell, and the battery basically has no fire problems. ③The biggest safety hazard of lead-acid batteries lies in their constituent materials. The electrodes of lead-acid batteries are mainly made of lead and its oxides, and the electrolyte is a sulfuric acid solution. The stability of these constituent materials is not very high. If leakage or explosion accidents occur, the damage caused will be much higher than that of lithium-ion batteries. Lithium electric vehicles have many advantages, but at present, lead-acid electric vehicles are the mainstay. The important factor is the imperfection of lithium-ion battery technology. Although some lead-acid giants and electric vehicle giants have begun to develop lithium-ion products, they are Many companies are constantly exploring and exploring new areas, and the initial products may not reach the stage of maturity. From the perspective of battery safety redundancy design, qualified lithium-ion batteries and lead-acid batteries can fully ensure the safety of users, and there is no clear safety difference. However, due to the large number of low-end small electric vehicles and scooters on the market, and most of them use poor-quality lithium-ion batteries, they are relatively more prone to accidents. This also leaves consumers with unsafe lithium-ion batteries. illusion. From a safety point of view, lithium-ion batteries are much inferior to lead-acid batteries. Overcharge may explode, and if the lithium-ion battery is spent, it cannot be recycled like lead-acid batteries. The price is much more expensive than that of lead-acid batteries. Lead-acid batteries and lithium-ion batteries have their own advantages. , We can’t say in absolute terms who is good and who is bad. How we choose between lead-acid batteries and lithium-ion batteries depends on our actual situation.