How can we choose a power tool protection board?

1. After specifying the type of battery (ternary, lithium iron, titanium lithium) on the power tool protection board, determine the resistance of the battery cells in series or parallel, and choose according to the number of series.

2. Determine whether the battery pack is charged through the same port or separate ports. The same port uses the same charging and discharging wire, while the separate port uses separate charging and discharging wires.

3. Determine the required current value for the electric tool protection board: I=P/U， That is, current=power/voltage, remember, this is only a theoretical value. In reality, we use this theoretical value as a reference, taking into account the load capacity, uphill and start-up environment. Generally, two wheeled electric vehicles choose more than twice this theoretical value, three wheeled electric vehicles choose more than three times this theoretical value, and four-wheel low-speed vehicles generally need about 3.5 times. The inverter and energy storage are combined, which is about 1.2 times larger. Alternatively, referring to the current limit of the electric vehicle controller, the current value of the protection board must be greater than the current limit value of the controller.

4. Balance is the process of discharging through a balancing resistor to make the voltage of each string of batteries in a battery pack tend to be consistent, while ensuring that the voltage difference between the batteries in each string is not significant.

5. Temperature control protection, which protects the battery pack by testing the temperature of the battery, can be customized for an additional five yuan.