JBD High Quality BMS 7~20S 200A 300A Lifepo4 Li-ion Battery Management System BMS with Relay Same Port with UART and RS485

JBD-AP20S003S is specially designed for 7~20 series battery packs of power batteries, electric bicycles, motorcycles and other products; it can be applied to lithium batteries with different chemical properties such as lithium ion, lithium polymer, and lithium iron phosphate. The protection board has a strong carrying capacity, and the maximum continuous discharge current can reach 300A. ● 7-20 series protection, automatic identification of the number of battery strings ● Vehicle-grade analog front-end chip, high voltage acquisition accuracy, safer and more reliable. ● Multiple protection functions for charge and discharge ● Relay power switch, high voltage resistant, more reliable. ● Accurate SOC calculation, with automatic SOC learning function ● Optional RS485 communication function, which can read all battery data in real time and upgrade online. ● Optional CAN communication function ● Reserved switch to control the output of the protection board. Equipped with discharge switch and pre-charge function to prevent sparking ● When the standby time reaches the set value (page switching time set by parameters), the machine will automatically shut down and sleep to reduce standby power consumption. ● Support series connection, but the total number of series connection after series connection is less than or equal to 32 series connection ● Does not support parallel connection of battery packs (battery packs are directly connected in parallel, there is a problem of high-current discharge from high-voltage battery packs to low-voltage battery packs)

overcharge protection: When the battery is in charging state, the voltage keeps rising. When the protection board detects that the voltage of any cell is higher than the overcharge protection value, the protection board will start timing immediately. When the time reaches the overcharge protection delay, the protection board will turn off the charging MOS tube, and it cannot be charged at this time.Overcharge Protection Recovery: After overvoltage protection occurs on the protection board, the battery voltage will drop when the battery is static or discharged. When the protection board detects that each voltage is lower than the recovery voltage of the overcharge protection, the protection board will output a signal to turn on the charging MOS tube for charging.Over discharge protection: When the battery is in the discharge state, the voltage keeps dropping. When the protection board detects that the voltage of any cell is lower than the overcharge protection value, the protection board will immediately start timing. When the time reaches the over-discharge protection delay, the output signal of the protection board will turn off the discharge MOS tube, and the load lock circuit will work, but it cannot discharge at this time.Over discharge protection recovery: After the over-discharge protection occurs on the protection board, the battery voltage will rise when the battery is static or discharged. When the protection board detects that each voltage is higher than the recovery voltage of the over-discharge protection. At this time, disconnect the load or charge, and the protection board will output a signal to turn on the charging MOS tube for charging.overcurrent protection: When the battery is at rest or discharging, the current suddenly increases. When the protection board detects that the current reaches the overcurrent protection value, the protection board starts timing. When the current duration in the circuit reaches the overcurrent protection delay time, the output signal of the protection board will turn off the discharge MOS tube, and the load lock circuit will work. Discharging cannot be performed at this time.Overcurrent protection recovery: After the protection board has discharge overcurrent protection, the discharge MOS tube is cut off, and the current in the loop becomes 0. At this time, the load is disconnected or charged, and the output signal of the protection board is turned on to discharge the discharge MOS tube.