The implementation of the new national standard has also accelerated the time limit for electric bicycles with lithium batteries, now, more and more electric bicycles use lithium batteries as a power reserve, how to properly use the charger to charge the lithium battery is something that few users will be concerned about, but unknowingly use the wrong way to cause damage to the battery or more serious safety accidents that will not be worth the loss. The vast majority of lithium battery combustion and explosion accidents are caused by charging, so it is very important to use the right charger to charge the lithium battery.
What is the best charger for lithium battery electric bicycle?
In general, electric bikes are equipped with original battery chargers, so using the original charger is of course the best result. Electric bike manufacturers will use battery chargers according to the specifications of the battery, which is safer than choosing your own charger.
When the electric bike is running low on the way to travel, we need to use a non-original charger for charging, whether it is a lead-acid battery, or a lithium battery, there are corresponding specifications, so when using a third-party charger, we must know the basic parameters of the original charger and choose a lithium battery charger as close as possible for charging. For example: common electric bicycle batteries are 36V 48V, etc. The original specifications of the charger are generally 42V-2A, or 54.6V-2A (corresponding to 36V and 48V lithium batteries). And most charger manufacturers will indicate on the charger label whether it is a lead-acid battery charger or a lithium battery charger, and the two cannot be mixed.
Can I use different chargers to charge batteries?
The answer is no. For example, if you use a 54.6V-2A charger to charge a 36V Li-ion battery, the Li-ion battery will be disconnected and protected, so it cannot be charged normally, or if you use a lead-acid battery charger to charge a Li-ion battery, this is also not feasible. Lithium batteries use the CC/CV mode charging, lead-acid batteries use pulse charging, the two chargers are different standards for battery discriminating full. Mixing them will directly damage the battery.
Can I use a fast charger?
The answer is that it is possible within the range allowed by the battery, but in general it is not recommended to use a fast charger for charging, now the technology of lithium batteries to achieve fast charging, only by increasing the current to shorten the charging time, the best charging efficiency of general lithium batteries is 0.2C (for example, the capacity of 10Ah battery, the best charger current is 2A, similarly, if the battery capacity is 40Ah, the best current to charge the battery is 8A, but the lithium battery for electric vehicles are used to power battery standards, so the maximum acceptable current can be up to 1C efficiency. The actual application we use 0.5C current to charge the lithium battery is safe. (For example: 10Ah battery can be charged with 10Ah x 0.5 = 5A current, 40Ah lithium battery can be charged with 40Ah x 0.5C = 20A)
Although theoretically we can use high current fast charging method, because lithium batteries are managed through the protection board, most of the protection board for the safe use of the battery, usually will do certain restrictions. For example, some 10Ah power battery can only use 2A current for charging, more than 2A current automatically disconnected, so as to achieve the role of battery protection. (For example, the Xiaomi scooter uses 2A current protection, and when the charging current exceeds 2A, the battery directly enters the disconnected state.
As we use lead-acid batteries for a long time, it is difficult to get used to lithium batteries in a short time, higher density lithium batteries will inevitably become the mainstream trend of power supply in the future, while we use lithium batteries, safe use must be put in the first place, how to properly charge lithium batteries, is no user must master the knowledge.
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