Knowledge sharing of lithium-ion battery testing for electric bicycles

　　The detection of lithium-ion batteries for electric bicycles is a key step to ensure battery performance, safety and prolong service life. The following are detailed methods for testing lithium-ion batteries for electric bicycles:Even so, e-bike battery We must also adhere to the quality of the industry and create unique products for the company. https://www.chamrider-battery.com/

　　

　　First, the appearance inspection

　　

　　Observe the battery case: check whether the battery case is intact, and there are no depressions, cracks, scratches, pits or leakage. These defects may lead to electrolyte leakage, short circuit or battery performance degradation.

　　

　　Check the size of the battery: confirm whether the size of the battery meets the design specifications. The size deviation may lead to assembly problems or affect the performance of the battery.

　　

　　Check the battery connection port: Make sure that the battery connection port is clean, free from corrosion or oxidation, which helps to maintain good electrical connection.

　　

　　Second, the label inspection

　　

　　Product identification: confirm whether the battery has product identification (or invoices and other purchase vouchers) and whether the nominal voltage, rated capacity and other parameter information are clearly identified.

　　

　　Safe service life: check whether the battery has reached the safe service life specified by the manufacturer, and the battery beyond the service life may have potential safety hazards.

　　

　　Voltage marking: Make sure that the nominal voltage of the marking does not exceed 48V, which is the safety standard for lithium-ion batteries for electric bicycles.

　　

　　Third, the performance test

　　

　　Internal resistance test: use an AC internal resistance tester to measure the internal resistance of the battery pack to ensure that the internal resistance is not greater than 0.5Ω. Small internal resistance means low energy loss and high efficiency, while high internal resistance may lead to battery heating and performance degradation.

　　

　　Maximum output voltage test: After the lithium-ion battery is fully charged with the original charger or universal charger, measure the battery output voltage to ensure that it does not exceed 60V.

　　

　　Discharge capacity decay rate test: measure the discharge capacity of lithium-ion battery and compare it with the rated capacity to confirm that the capacity decay rate does not exceed 50%. Too high capacity decay rate may mean that the battery is aging and its performance is degraded.

　　

　　Fourth, charge and discharge performance testing

　　

　　Endurance test: Install the fully charged battery on the electric bicycle and completely discharge the battery. Observe the change of mileage and remaining power to evaluate the battery life.

　　

　　Charge-discharge cycle test: in a suitable test environment, the performance of the battery under different working conditions is evaluated by charge-discharge test instruments. The test can include cyclic charge and discharge, fast charge and high temperature charge and discharge.