Lithium batteries are still a little less safe than lead-acid batteries. You see lithium batteries spontaneously combust, have you seen lead-acid batteries spontaneously combust? Even if the lead-acid battery is bursting with gas, it will not spontaneously combust, at most it will just break. To take a step back, traditional big brand RV manufacturers have not abandoned lead-acid batteries. Lead-acid batteries have a history of 150 years, the advantage is the high safety factor, high stability. Traditional RV manufacturers do not like to use lithium batteries. Because even if there is a risk of asking a minute, the big brands do not dare to take the risk of destroying a brand perhaps due to an incident.
On the contrary, some new school of small manufacturers, in order to meet the needs of customers, the battery can be optional lithium batteries. Lithium batteries are too many advantages over lead-acid batteries! For example, high energy density, the same capacity of the lithium battery volume is smaller and lighter. The same volume of the battery, lithium battery capacity is greater. High capacity density, lithium batteries can choose 48V power supply system, the use of lithium batteries can be high current discharge characteristics, the use of 48V lithium + 48V inverter, can supply a larger capacity of 220V power, can use high-power appliances. This is undoubtedly the biggest temptation for RV enthusiasts: large capacity, the output power is large enough!
From the many new energy vehicles fire, spontaneous combustion incident let people know that the original lithium battery in specific conditions will spontaneously combust. This is the biggest defect of lithium batteries, especially ternary lithium batteries. While lithium iron phosphate is to stabilize some, is the first choice for the caravan for lithium batteries. Trithium or lithium iron phosphate or, together with the defect is that once the thermal runaway phenomenon occurs, then the battery will be violently burning, it is difficult to extinguish.
If the caravan choose lithium battery then safe?
So this kind of battery is necessary to equip high-precision battery maintenance board, electric cars are specially equipped with battery handling system, the purpose is to try to avoid the battery thermal runaway phenomenon, to maintain the battery, the maximum limit to control the accident occurred. Tesla battery handling skills are recognized NB, but some time ago there was a Tesla in the parking lot, without warning of spontaneous combustion! Neither by external impact, nor in the charging state, indicating that the good power handling software can not be 100% to ensure the safety of the battery.
These batteries are purely hand-assembled by the seller, and the battery maintenance board is also a bought product. Put in a stainless steel box can be sold! It is difficult to have a variety of security tests!
The data above can be seen, lithium battery volume is really very small. The weight is also much lighter than the lead-acid batteries, with greater capacity. Theoretically, the risk of using low-voltage lithium battery pack is much lower than the high-voltage battery pack for electric vehicles. Low-voltage battery packs use a small number of single cells, most of them choose four strings to complete the 12V voltage and then N groups of batteries in parallel to expand the capacity. 12V voltage which is much smaller than the risk of the battery pack easily 500V, the choice of stainless steel shell, the safety factor has also been improved, but once the battery is found to be abnormal, the battery box can be directly thrown outside the car.
This type of battery is suitable for players, suitable for electronic enthusiasts to use, the best with a simple repair ability. Monitor the discharge current, charging current, know how to equalize, several series and several parallel, charging voltage, maintenance voltage, maintenance circuit principle, cell damage can be found after the fault monomer and have the ability to replace. The advantage of lead-acid batteries is the price is cheap, even if the battery two years to scrap, then you can sell back the new battery 1/3 of the money. Although lithium batteries claim to be able to use eight years, but we should pay attention to the capacity decay problem.
Our cell phones use lithium batteries, generally two years after the capacity will have a certain decay, and the battery is not damaged, but the standby time is greatly shortened, this time want to use comfortably, even if the battery is not bad to change, or a new phone, which is the life of the lithium battery. Not necessarily damaged, but the capacity decay is normal.
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