It has the following functions: (normally, there are three types: 1: no protection (direct output); 2: overshoot and overdischarge protection; 3: full protection (all of the following functions).
p>< p>A: Overcharge protection: When the battery voltage reaches a certain value (less than 4.4V), the protection board cuts off the charging circuitB: Protection against over-discharge: when the battery voltage drops to a certain value (2.2 V or more), the protection board cuts off the discharge circuit
C: Short-term protection. -circuits: When the positive and negative terminals of the battery are short circuited, the circuit can be quickly cut off to protect the battery core: Overcurrent protection: When the battery output current exceeds a certain. value (approximately 2A), the protection circuit cutsthe output circuit
. E: Other auxiliary functions: There are usually NTC, identification resistors, and the main function of the decoding chip is to ensure that the battery can be charged and used normally with the original mobile phone and charger.
The. The lithium electric car battery I assembled is 48V 12Ah. What type of protection panel is suitable and how to connect the lines? < /h3>
Output voltage range: 2.5 ~ 4.2V Rated capacity: 7500mAh
Standard continuous discharge current: 0.2C
Maximum continuous discharge current: 1C
Operating temperature: Charge: 0~45℃
Discharge: -20 ~60℃
Model cable size: national standard wire UL3302/26#, wire length 50mm, white The wire is 10K NTC
Protection board parameters: (each parameter can be set according to customer's product )
Protection voltage againstovercharge/4.28 ± 0.025 V per string
Overcharge and discharge protection voltage 2.4 ± 0.1 V
Over current value: 2 ~ 4 A < /p>
When choosing a protection board, you should first consider the material used in the lithium battery, which is lithium manganese oxide battery or lithium battery iron phosphate
After determining. the material of the lithium battery, the protected version model can be determined by determining the number of batteries in series and the maximum value of the charging and discharging current of the electric vehicle
As for the connection of line, it is. Difficult to explain in a few words. Usually, the protection card is divided into two types: the same port and the separate port. The same port wiring is more convenient. According to the protection board, charging and discharging are connected to the same point. That's all ; split wires are usually splités into two types: the thinner one is the charging port, which is connected to the charger connector; the thicker one is the discharge port, which is usually connected to the motor. /p>
I hope the above is helpful to you