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Selection of Batteries for Pedelec

Selection of Batteries for Pedelec

In China's electric bicycle market, the most commonly used lead-acid maintenance-free batteries are AGM batteries with glass fibre partition adsorption technology. In addition, there are GEL-type colloidal batteries with colloidal electrolyte technology. However, agm battery manufacturers China still have a large proportion.


AGM battery has the advantages of low cost and high discharge current, but it has the shortcomings of narrow operating temperature range, easy water loss and thermal runaway; while GEL battery has high cost, but it has the advantages of stable performance, wide operating temperature range, over-charge and over-discharge resistance and long life.


Because the battery of electric bicycle belongs to high current and deep cycle discharge in most cases, the colloidal battery is more suitable for the battery of electric bicycle. Colloidal batteries have very strong ability of resisting overdischarge and electro-hydraulic preservation, which avoids the influence of overdischarge on batteries and the thermal runaway caused by water loss of batteries.


Charging characteristics of various brands of lead-acid batteries are basically the same. However, due to the different battery material formulation, electrolyte concentration and content of each manufacturer, the charging voltage of each manufacturer is also different. Therefore, strictly speaking, the charging voltage scheme of each agm battery manufacturers should be determined according to the specific requirements given by each manufacturer, otherwise it is easy to cause the improper use of the battery.


The output power of the electric bicycle motor is to match the rated power of the battery. Therefore, in order to prolong the service life of the battery, the motor power of the electric bicycle should be as small as possible than the rated power of the battery, so as to avoid the battery working under full load or overload for a long time.