The most accurate method for professional testing of battery capacity is to fully charge the electric discharge meter test, C=W=IUt, that is, the capacitance is equal to the discharge current safety (A) X voltage volt (V) X time seconds or hours (S or H), generally The current is discharged with a rated capacity of 0.5 to 2 times. For example, if the 12AH battery is fully charged and discharged under the rated voltage and current for two hours, the current is inversely proportional to the discharge time and the discharge capacity. The larger the discharge current is, for example, the 2 times rate, the discharge time is More than an hour, the discharge capacity is about 8AH, and instead of discharging at 0.5 times, it can discharge 15AH for more than two hours.
Non-professional general capacity-free tester or discharge meter, can be calculated by 12V car high-power bulb or a piece of electric furnace wire discharge C=Pt, filament power P(w)X time t (second or hour), if there is only a multimeter at hand, electric car can also be used. The motor idling discharge measures the quality of the battery. This is to determine the battery quality by using the inverse relationship between the charge and discharge changes in capacity and voltage.
First, use the connecting car to charge the charger. Use a multimeter to test the open circuit of each battery before charging, charging, and full of three-phase voltage. Before discharging the battery, the voltage of each battery is generally about 11-12V, and the difference is within 0.3V. The gap is very low voltage is a bad battery, the positive and negative voltages in the charging rise fast, the capacity is small, the battery is stable, the voltage is stable and the other is consistent with the normal battery. The large voltage difference is a bad battery. The final discharge voltage drops rapidly. The bad battery is low. The bad battery is bad. The bad battery has the above characteristics. The full voltage changes greatly. Discharge the car bulb or electric furnace wire, or lift the car frame to open the electric lock and turn the handlebar motor to discharge.
In short, the charge rises quickly and the discharge drops quickly to prove that the capacity is small or damages the broken grid. Charging battery is hot or normal charger does not change green light to stop charging, then water shortage or resistance is large, charging time is short, the vulcanization crystallization capacity is small, need to add water or negative pulse activation, a group of several battery impedance capacity voltage imbalance needs to be rebalanced The group is consistent.
Second, professional battery testing methodsHere the industry insider also introduced some more professional methods to check the quality of the battery:
1. After the battery is fully charged, connect the battery, ammeter, and resistance wire.1) Use a multimeter to measure the voltage of each battery, and write down the value, and note the discharge time. Adjust the resistance wire so that the ammeter pointer points to 5A.
2) During the discharge process, keep the ammeter always at 5A, and measure the battery voltage every 20 minutes, and record the measured value. When the battery voltage drops to 10.5V, the discharge time should not be lower than 84 minutes.
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The Advantages of Lithium-ion Battery Pack
1.Higher energy density
The higher energy density of lithium-ion battery pack means we are going to get more power out of the same physical size cell than we could get from a lead-acid battery. So when using lithium-ion battery for electronic gear, it means more runtime but less weight.2.Less weight
Less weight could be a big advantage for most electronic applications that need to be in a compact size and lightweight for use, including mobile applications, robots, drones, floor scrubbers, RVs. A lot of power is used for those devices, so less weight would be certainly an advantage for mobile applications.3.Thousands VS hundreds of cycles
More cycles are an advantage by a lithium product we`re gonna get. You know the lithium batteries could provide thousands of cycles versus lead-acid batteries which only offer hundreds of cycles. It is a big difference in the cycling ability of lithium over lead-acid batteries.4.Charge and discharge rate
We are able to discharge a lithium product much quicker than that of a lead-acid product and get the same capacity. If the lithium-ion battery pack is discharged to 80%, you can still get a good lifespan. But doing that with a lead-acid battery will damage its lifespan. Generally, a lead-acid battery can only use fifty percent of the discharge. The recharge time is quicker on a lithium product as well especially if we have a charger that`s large enough to put the capacity back. The lithium-ion battery packs have a low self-discharge rate of only 1-2% per month.
5. Less Maintenance
When using lead-acid batteries for power supply, regular maintenance is essential to ensure the battery performance. However, when purchasing lithium-ion batteries for power use, less maintenance is required. The lithium-ion cells is more stable with good performance. It saves a lot of time for maintenance and cost for replacement.
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