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Key Factors to Consider When Selecting a Lithium-ion Battery

When selecting a lithium battery for your electric bicycle, it is crucial to take into account the voltage and ampere ratings. These ratings play a vital role in determining the battery's endurance, power input, and range. It's worth noting that choosing an incorrect voltage or ampere rating could result in damage to your e-bike or even a fire hazard. Hence, it is important to carefully consider these factors when choosing the right battery for your electric bike.

Voltage is a critical consideration when selecting a battery for your electric bicycle, as each bike has a specific input voltage range. It’s important to use a battery with the exact voltage required to power your bike and avoid using one with a higher or lower voltage than recommended to prevent complications. If you use a battery with a lower voltage, your bike’s motor system may not have enough power to function correctly, while a higher voltage can damage the motor system’s delicate electrical components. Most electric bikes support nominal voltages of 36 volts or 48 volts and come equipped with an 18650 cell. Lithium cobalt battery cells can hold up to 4.3 volts when fully charged and around 3.1 volts when discharged. To calculate the average voltage of your battery, multiply the voltage of each cell cluster by the number of clusters and then divide the result by the total number of cells. The resulting average voltage range will indicate whether the battery is compatible with your bike. Voltages are directly proportional to speed on your electric bike. Choosing a battery with a higher voltage rating within the motor limit can result in increased top speeds, all other factors being equal.

Amperes represent the current flow at a specific voltage, and they determine your electric bike’s torque. The more amperes your motor system has, the more torque it can produce. For instance, with a 49V 13Ah battery, your e-bike can reach a peak of 68A and a continuous draw of 45A. However, most motor systems can only pull the required current, so choosing a high current output battery won’t damage your bike’s motor.
Therefore, amperes are critical to how fast your e-bike can deliver speed, while volts are the measure of speed. Higher voltage means more speed, while a higher amperage rating means more speed per second or hour. Therefore, your electric bike’s power output determines the torque you’ll get.

To Recapitulate

Selecting the ideal Lithium-ion battery for your electric bike may seem like a daunting task. Nevertheless, Lithium cobalt batteries stand out due to their high energy density. However, this does not imply that other Li-ion batteries are unsuitable for your electric bike.

Lithium manganese batteries are environmentally friendly and safer. Furthermore, they offer a higher cell voltage than lithium cobalt batteries, though their energy density is 20% less. In addition, Lithium manganese batteries offer extra benefits in terms of Li-ion chemistry such as better temperature performance and lower costs.

Ultimately, when it comes to purchasing a Li-ion battery for your electric bike, your budget is a crucial factor to consider. It is crucial to select the best battery type for your bike to ensure that you can ride it smoothly without any issues. We are available to answer any questions you may have about electric bike batteries, so feel free to contact us today.

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