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The battery is one of the most important components of an e-bike, and it is also the most expensive. The battery is the determining factor in how long you can use the bike without it, how long it can work, how much weight it can hold, and more. Often, when you choose an electric bike, the battery is what you have to pay for. Next, the e-bike battery supplier will share it with you.
Choosing a good e-bike battery directly determines how efficient it is and how far it can travel on a single charge. directly determines how efficient it is and how far it can travel on a single charge. Even if the size and weight are the same, different batteries can vary greatly depending on the type and construction. All battery characteristics include capacity, voltage, size, weight, charge time, and total battery life.
Voltage: Most e-bike kits are rated within a specific voltage range. A typical 36V e-bike requires a battery that can deliver 30V to 42V. 36V battery packs are 100% charged at 42V and hold as much energy as possible. At 30V, the power should be turned off and the power supply stopped to avoid permanent damage. For more information about BMS (Battery Monitoring System). The generic number "36V" is the average operating voltage, sometimes referred to as the nominal voltage. Voltage is measured in volts (V) and is used to describe the speed at which electrons move. More voltage = more speed!
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Capacity is the amount of electricity that can be stored in a battery. It is the main characteristic of any battery. The unit of measurement is Ampere Hours (Ah). This value is a measure of the number of fixed amps that the battery can sustain for 1 hour (C rate). Double the amplifier for half an hour. Or cut the amplifier in half, etc., and so on.
The battery has a certain number of charge/discharge cycles, after which the capacity begins to drop proportionally. A cycle is considered to have been spent if the battery is discharged and recharged at 10% of its capacity.
The actual battery life depends on the number of cycles and depends on the operating conditions of the battery. The longer the battery is discharged, the fewer cycles can be expected.
This is the oldest variant and is used less and less every year. There are many reasons for this, the main reason being lack of capacity. Gel batteries are heavy and the battery makes the bike very heavy in structure. In addition, it is very slow to recharge: it takes 8 to 10 hours to fully charge. The life span of this battery is also very short, only 150-200 cycles.
The most popular and optimized e-bike battery today. Li-ion batteries have the best combination of total weight and capacity. Li-ion batteries have the highest specific capacity of any available type, which is their main advantage. Lithium-ion batteries do not have a "memory" effect.
Lithium-ion batteries for electric bicycles must be specially designed due to the battery management system (BMS) incorporated into the battery pack. This circuit must be properly set up to control the current draw required by the motor and to limit excessive discharge capacity. the BMS is also important for balancing the battery charge between individual cells in the battery to maintain battery life.
This type of battery is popular primarily among cell phone manufacturers because it cannot operate electric bicycles and cannot withstand the bumps and vibrations that occur during riding.
It is designed for use in electric vehicles where such vibrations are not likely to occur. It is often used in model airplanes where weight is important.
As far as the ignition is concerned, this is the most dangerous battery! Under unfavorable conditions (short circuit, BMS failure, accident), there is a high risk of fire.
This is a relatively new but already popular battery. The advantages of this battery include its resistance to freezing (it works in temperatures down to -30 degrees Celsius without loss of capacity) and its ability to recharge quickly. This type of battery has the highest number of complete cycles, about 1,000, and it is less prone to aging than ordinary Li-ion batteries. Disadvantages of LiFePo4 batteries include low specific capacity and high cost.