electric bike kit
Electric bike conversion kit including the controller, the battery, and the motor are mainly three parts. If you have a brake device, you can have V brakes, disc brakes, drum brakes, etc. Generally good electric bikes will be specially equipped with Shimano brakes, 7 speeds, can increase the torque and increase the feeling of pedaling .
Basic structure of electric vehicle
We know that electric bicycles are special bicycles with batteries as auxiliary energy sources and two wheels that can realize human riding, electric or electric assist functions.
It has the appearance characteristics of ordinary bicycles (even the appearance characteristics of electric motorcycles), but the main thing is that it is based on ordinary bicycles. It is installed with motors, controllers, batteries, handles, brakes and other operating components and displays. Instrumentation system. Mechatronics personal transportation.
Different types of vehicles have different battery placement positions and controller forms.
The main functions of each component are as follows:
1. Charger
The charger is a device that can charge the battery. It is generally divided into two-stage charging mode and three-stage charging mode.
Two-stage charging mode: first constant voltage charging. The charging current gradually decreases as the battery voltage rises. After the battery power is replenished to a certain level, the battery voltage will rise to the set value of the charger. At this time, it will be converted to trickle charging.
Three-stage charging mode: at the beginning of charging. First constant current charging. Quickly replenish energy to the battery; after the battery voltage rises, switch to constant voltage charging. At this time, the battery power is slowly replenished, and the battery voltage continues to rise; the charging termination of the charger is reached At the voltage value, it is converted to trickle charge to maintain the battery and supply the battery’s self-discharge current.
The charger design adopts a three-stage automatic conversion method of constant current, constant voltage, and floating charge, which protects the battery and effectively extends the battery life.
Tips for use: When charging, keep the charger well ventilated. If you smell peculiar smell or the temperature of the charger casing is too high during charging, please stop charging immediately and check and deal with it.
2. Battery
Batteries are on-board energy sources that provide energy for electric bikes. Current electric vehicles mainly use a combination of lead-acid batteries. In addition, nickel-metal hydride batteries and lithium-ion batteries have also been used in some portable folding electric vehicles. There are three main types of batteries used in electric bicycles, namely, small, sealed, maintenance-free lead-acid batteries, nickel-cadmium batteries and nickel-hydrogen batteries. Small, sealed, maintenance-free lead-acid batteries have a large cost and capacity, and are widely adopted by domestic enterprises.
3. Controller
The controller is a component that controls the speed of the motor, and is also the core of the electrical system of the electric bike. It is designed with multiple protection function control systems, with undervoltage, current limiting or overcurrent protection functions. The intelligent controller also has a variety of riding modes and a self-checking function for the electrical components of the vehicle.
The controller is the core part of electric vehicle energy management and various controller signal processing. Stepless speed regulation, soft start, under-voltage protection, over-current protection and brake power-off, etc. Protect the motor and the battery, so that the current can be output in a controlled manner to generate the required power without burning the motor.
Tips for use: The main control board of the controller is the main circuit of the electric vehicle, which has a large working current and will emit a large amount of heat. Therefore, do not park the electric vehicle in the sun or expose it to rain for a long time to avoid malfunction of the controller.
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