An Electric Bike is a fantastic way to reduce your Carbon Footprint and to be Green. They are also great fun and mean you can enjoy that outdoor freedom, that a bike gives you, but without arriving at your destination sweaty and tired. If you like riding, but are finding the hills are not so fun, or you need to travel further than you are comfortable pedaling, then you can let the Electric Motor take the strain on an Electric Bike. However, an Electric Bike is only as good as its weakest link, so a suitably rated, reliable and safe E-Bike Battery is key.
We all know that an e-bike has an e-bike battery to provide energy to the rest of the system, but do you understand what Volts, Capacity, Power, Energy and all the rest of those confusing numbers and terms really mean?
Some people will say that an e-bike battery is the same as a laptop battery or mobile phone battery and in a sense, they share many similarities. But there are also differences and you should remember that the total energy within an e-bike battery is far greater than you would find in any personal device.
So, what are the basic components/parts that make up an ebike battery?
E-bike batteries are made up of numerous cells, typically 3.6V, 2-3.5Ah each (don’t worry we will explain this terms in a while ?) and there may be 30, 40, 50 or more of these cells in a typical e-bike battery, that are combined in series and parallel to meet the total voltage, capacity and power requirements requirements. The BMS that sits between the combined cells and the outside World. The BMS protects the cells (also external components) from damage and maintains the cells, so that they can work together in an optimum way and safe way for the long term.
A lithium ion cell has a safe working voltage range that every cell must stay within. If either the upper or lower voltage limits are exceeded, the effected cell/cells can be permanently damaged and could even result in a dangerous situation. It is the job of the BMS to keep the cells working within the normal working range and this is achieved by disconnecting the charger if any cell within the battery exceeds the High Voltage Cut (HVC) and by disconnecting the load (motor controller in this case) from the battery, if any cell within the battery hits the Low Voltage Cut (LVC).
The BMS will also have protection against excessive discharge current (over-current), which could be due to using an excessively powerful Motor System with an inadequate battery, or to protect against a short-circuit condition (such as a damaged cable, or faulty external component). A similar principle will also be applied for charging, and there will be some form of over-current protection for charging.
In addition to the above, there will also typically be some form of balancing function on the BMS. Balancing a battery, means to reduce any variations in the cell voltages. By doing this, the cells are working together, so you can obtain the maximum possible capacity, as well as to avoid any cells within the pack reaching the HVC, or LVC voltages before the others in the battery (as this may prematurely age those cells). There may also be some form of temperature sensing to halt the charge, or discharge, if the battery exceeds the safe operating temperature and a low temperature limit, that may prevent the battery from being charged if the battery is excessively cold.
There may also be other functionality available on high tech BMSs, such as being able to communicate battery data to your phone or to provide diagnostic data remotely in the event of an issue. Here at EM3ev, we are moving towards high tech, programmable Smart BMSs, that will link to your phone to provide useful battery data, as well as indicators of the batteries state of health.
Shenzhen BOOANT Electronic Technology Co., Ltd. is a high-tech enterprise of integrating R & D, production and sales,a famous lithium battery, polymer lithium battery and lithium iron phosphate battery manufacturer in China. Has a strong scientific research and technology ability.Company products are mainly exported to Europe and the United States, Australia, Russia, Southeast Asia market. The company's products have passed UL, CE and other international safety certification, Pass the SGS test, PSE, KC, ROHS certification, UN38.3, MSDS, widely used in electric bicycles, industrial equipment, security equipment, medical equipment, solar energy storage, Instrumentation, power tools, electric toys and other products. Welcome to our company for business.
As a Leading Brand for E-Bike Power Supply Sloutions, Booant Takes "Simple and Safety" as The Orientation of Product Culture,and Strives to be Wanguard of Green Fashion.