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There are many types of lithium ion batteries on the market. Take 48v20Ah lithium batteries for example, the capacity is the same, some vendors sell them for thousands of dollars, while some lithium battery vendors only sell them for a few hundred dollars. This begs the question, which one is real and which one is not?
Judging the quality of lithium-ion batteries from the appearance can not be seen, generally we need to use professional testing equipment. For example, use the discharge capacity tester to test the battery capacity; use the internal resistance tester to test the battery resistance is how much, the smaller the better, is a product, the test will know.lithium ion battery VS lead acid battery Test the protection function of the circuit board again, overcharge, over-discharge, over-current, short circuit, over-temperature, equalization function is normal. But we bought a lithium ion battery to use but can not buy a device to test it. It's too much trouble. Umatakumi, a veteran of lithium-ion batteries, tells you how to judge the quality of lithium-ion batteries from experience.
1. Appearance of the product
Usually we get lithium batteries are finished products, that is, in the factory has been tested to meet the shipping requirements of the product. But next we can look at the case from the lithium battery product case mark, there will generally be the name of the manufacturer, battery specifications and models, voltage range, resistance range, capacity range, current range and other information. Focus on lithium old crew, ordinary perspective to share the story of lithium! Then look at the appearance of lithium battery products, product protection, product identification, product manuals and so on are complete. Product appearance is the company's image, but also the company's soft power, product appearance does not speak of predictable product quality.
2.Product weight
We all know that the larger the capacity of the battery, the heavier the battery will be. The weight and capacity of lithium batteries are directly proportional.lithium battery vs lead acid If the weight of lithium batteries of the same specification and model is too different, the capacity will definitely be insufficient. However, some batteries have different capacities, so it is hard to say, so the battery industry had better find some reputable lithium battery manufacturers. In order to reduce costs, many people use inferior batteries and protection plates to falsely label the capacity, so you must be careful when buying to avoid being cheated.
3. Battery Voltage
We buy batteries mainly for use through the normal use of these are their own charging and discharging two different situations. Because in the battery standby and use a process with a certain degree will have a working voltage, at this time the need for our teachers can choose to use a multimeter voltage gear to test the output port voltage value of the battery to see whether the voltage value is with the identification of the voltage value range. Even enterprises can improve the measurement to analyze the battery self-discharge test, the first test port voltage and then set aside 5-7 days after another test port voltage value, the smaller the value of the two voltage value comparison shows that the lower the battery self-consumption.
4, battery charge and discharge
Charge and discharge conditions for normal use. Charger we have a matching special charger, you can see the charging parameters labeled above the charger, you can see that the state of charging is normal. When charging with the charger, the regular charging indicator is red and the indicator is green for standby or full state.
Lithium battery discharge test work requires teachers professional discharge test and analysis instruments, and we can not be missing is a professional test of the main instrument, at this time the enterprise can be replaced by a direct impact on the use of China's electric bicycles. Installation of the battery to the electric bicycle above, and then start the power switch, and then turn to turn the handle to the maximum economic operation for 1 - 3 minutes, and then brake to stop and then begin to fully start accelerating, so that the cycle of 2 - 3 times can be realized to simply determine whether the battery discharge is normal. You can also do a small discharge load to test the battery, for example, for our battery specifications 48V20Ah, power 960W, the use of 1000W light bulbs to the battery management research discharge, discharge activity time should be 50 - 57 minutes more scientific and reasonable.