Batteries are the bottleneck of electric vehicles, the bulk of manufacturing costs, and the source of dealers' financial resources. Proper use and maintenance can greatly reduce the operating cost of electric vehicles for users, improve reputation and reduce trouble for dealers. Electric Motorbike With Brushless Motor supplier reminds that it is very necessary to master the knowledge of lead-acid batteries.
First of all, we must understand what is the lead-acid battery capacity? It is the amount of electricity that can be released when a fully charged battery is discharged to a prescribed termination voltage under certain discharge conditions. It is not easy to test whether it is so-called fully charged. For open batteries, the specific gravity of sulfuric acid can be determined. For sealed batteries, it can only be roughly estimated by testing other indicators. The so-called termination voltage generally refers to 10.5V for a 12V battery. This voltage must be measured quickly, because after stopping the discharge, it will rise. Capacity is usually expressed in ampere-hour (A.h) or watt-hour (W.h), the former being the most common. The capacity is often expressed in capital C. The charge-discharge rate is usually expressed in C or hour h. For example, the 10-hour rate can be expressed as 0.1C, and for a 12AH battery it is 1.2A; for example, the 20-hour rate can be expressed as 0.05C, or for a 12AH battery, it is 0.6A. There are many factors that affect the capacity. As long as the temperature decreases, the capacity decreases, and the temperature increases. Also, different discharge rates, different methods of discharge, the displayed capacity is also different.
There are many ways to express battery life. For electric vehicles, it can be expressed in terms of years and months, as well as continuous mileage, and the number of full charge and discharge cycles. In a more scientific way, the end of life generally means that when the capacity drops to one-half of the root sign, which is 70%, the battery can actually be used at this time. Battery life is related to many conditions, as long as you master the following aspects:
1. In terms of charging, the charging current is about 0.1C, and the balanced charging is the best. Regular float charging is better than cycling, and replenish distilled water in time.
2. In terms of discharge, the discharge rate will seriously affect the life span. Although 0.1C is ideal, it is not realistic for electric vehicles. Try to control the rate at 3-5 hours, which is less than 0.5C. In short, shallow discharge (electricity) and frequent charging (electricity) can prolong battery life.
3. In terms of maintenance, it is mainly to add distilled water, add it once every two months in summer, such as 12AH battery, each interval is about 8-12ml, and do not add it in winter. If there is a lot of water loss, the charger voltage may be high and need to be corrected. In addition, the lead-acid battery has a negative temperature coefficient. In summer or when the temperature is high, the float voltage should be appropriately reduced.
Shock absorption of the on-board battery of electric vehicles also helps to extend its life and reduce operating costs. Pay attention to the distilled water and dilute sulfuric acid sold by the auto and motorcycle parts market. Just pour a little on the ground. The supplemental water is supplementary distilled water instead of dilute sulfuric acid. If you can't buy distilled water, you can use a pressure cooker to make your own. Insert one end of a 15-meter plastic tube into the exhaust valve, soak it in a circle in cold water to cool, and the other end will produce distilled water.
Through the above introduction, Electric Bike Manufacturer hopes that you can simply refer to the content of this article in future use.