How to Say 60V 20Ah Harley Battery Good Quality?
Introduction: today people are much more easier to get goods what they want via internet. when you buy a battey for your beloved Harley scooter, how do you know it's good quality or not? here we are making an anlysis from battery quality review.
Basic Data Analysis
(1) Voltage analysis
The open-circuit voltage of assembled lithium-ion batteries refers to the potential difference between positive and negative electrodes when no current passes through the external circuit. It can be measured directly by multimeter (accuracy is not less than 0.1 mV. It is recommended to use special voltmeter with high internal impedance to prevent self-discharge) or read directly after connecting to the battery test system. This value is only the initial open-circuit voltage after battery assembly. The open-circuit voltage under full SOC needs to be measured by constant current intermittent titration (GITT). Operating voltage refers to the instantaneous potential difference between positive and negative poles when current passes through the external circuit, which can be directly reflected in the battery test system data.
(2) Capacity analysis
Battery capacity is one of the most important performance indicators of lithium-ion batteries. It represents the storage capacity of lithium-ion batteries under certain conditions, usually in units of A.h (ampere-hour) or mA.h (milliampere-hour) (1A.h=1000 mA.h). The main method to obtain the capacity parameters of lithium-ion batteries is to discharge from 100% SOC to 0% SOC (i.e. within the test voltage range). Convection time integral.
For the tested battery materials, capacity analysis generally needs to determine three data: the first charge capacity, the first discharge capacity (positive material) and the reversible capacity.
A. The first charge capacity is the charge capacity at the end of the first charge of lithium-ion batteries.
B. The first discharge capacity is the discharge capacity at the end of the first discharge of lithium-ion batteries.
C. Reversible capacity is the capacity value of the battery after cycle stabilization (test value at room temperature is also called rated capacity). Generally, the discharge capacity of 3-5 weeks is selected, sometimes it may be necessary to select the discharge capacity after 10 weeks.
(3) Charge-discharge curve analysis
Charge-discharge curve reflects the charge-discharge behavior of battery materials. The analysis of charge-discharge curve of button batteries is of great significance to understand the performance and electrochemical behavior of materials. Especially, the analysis of charge-discharge curve of semi-batteries can analyze the characteristic behavior of a certain material.
(4) Differential Curve Analysis
In the process of analyzing the charge-discharge curve of batteries, in order to facilitate the study of the charge-discharge curve, the curve was differentiated and the platform area was converted into peak curve. The commonly used methods are differential capacitance curve (dQ/dV vs. V) and differential voltage curve (dV/dQ vs. Q) to analyze the charge-discharge curve.
what does SINOLI Battery do?
SINOLI Battery is a professional lithium ion battery manufacturer. we are making high quality batteries, including 36v/48v/60v/72v 10Ah 20Ah scooter use. all batteries made by SINOLI is seriousely test, guranttee offer 2 years.