Comparing lithium-ion batteries and lead-acid batteries, which is more secure and not easy to explode?

In terms of battery layout, the current lithium-ion battery packs are basically 18650 batteries for packaging, and lead-acid batteries are basically maintenance-free lead-acid batteries with good sealing performance. If the internal pressure is too large and the safety valve is abnormal If it is, the risk factor of the two is justified. If it is due to overcharge of the internal hydrogen evolution of the battery, the electrolyte content in the 18650 battery is quite limited, and the amount of hydrogen evolved is also extremely limited, but for the lead-acid battery using dilute sulfuric acid as the electrolyte, if overcharge occurs, hydrogen will evolve inside the battery The phenomenon is serious, and the probability of deflagration is greatly increased. From the perspective of battery safety protection, 18650 batteries are designed 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 blocking the battery to ensure The safety of other batteries in the battery pack. In addition, lithium-ion battery packs are usually equipped with BMS protective plates, which can accurately control the state of each cell in the battery pack, and directly handle the problem of overcharge and overdischarge from the source. On the contrary, in terms of safety protection, lead-acid batteries seem to be lackluster except for safety valves. BMS care is almost non-existent. Many inferior chargers can't even cut off power after being full. Safety protection is far from lithium-ion batteries. Although, if you use a lithium-ion battery whose value is similar to that of a lead-acid battery, no one can save you in this environment. Finally, there is one point. If the battery layout is shattered due to an accidental collision, lead-acid batteries seem to be more secure than lithium ion batteries. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: Lithium-ion battery electrolyte identity and advantages clarification