Lithium iron phosphate batteries, as energy storage batteries, have significant characteristics such as high reliability, long cycle life, and durability. They have been widely used as backup energy storage power sources for communication power sources, power DC power sources, UPS power sources, EPS power sources, etc. The Haibo lithium iron phosphate battery cabinet adopts a front wiring design, which is more convenient to operate and meets the customized needs of customers.

1、Definition of lithium battery pack models

        1. Electrical performanceConsistency of battery cell performance within the battery module.

(1) The difference between the maximum and minimum static open circuit voltage of each cell in the battery module shall not exceed 0.05V;

(2) The difference between the maximum and minimum static internal resistance values of each cell in the battery module shall not exceed 5% of the average value;

(3) The difference between the maximum and minimum capacities of each cell in the battery module should not exceed the average value of± 1%.

2. Capacity retention rateThe capacity of the battery pack should not be less than 95% of the rated value.

3. Cycle lifeThe cycle life of the battery pack should be greater than 2000 cycles.

4. Electromagnetic compatibility

(1) Electrostatic discharge immunity. The battery pack should meet the requirements of Grade 4 in GB/T17626.2-2006; After the experiment, its appearance should have no obvious deformation, liquid leakage, smoking or explosion, and it should be able to work normally.

(2) Conducted disturbance limit. The battery pack should meet the requirements of YD/T983-1998 level B; After the experiment, its appearance should have no obvious deformation, liquid leakage, smoking or explosion, and it should be able to work normally.

(3) Radiation disturbance limit. The battery pack should meet the requirements of YD/T983-1998 level B; After the experiment, its appearance should have no obvious deformation, liquid leakage, smoking or explosion, and it should be able to work normally.

(4) Surge (impact) immunity. The battery pack should meet the requirements of Grade 4 in GB/T17626.5-2008; After the experiment, its appearance should have no obvious deformation, liquid leakage, smoking or explosion, and it should be able to work normally.

5. Battery management functionThe battery pack is equipped with a dedicated battery management system (BMS)

6. Protection and alarm functions(1) Overcharge protection. When the battery pack is in an overcharged state, cut off the charging circuit and give an alarm. The battery pack should not leak liquid, smoke, catch fire or explode.

(2) Overdischarge protection. After discharging the battery pack to the termination voltage, cut off the discharge circuit and give an alarm. The battery pack should not leak liquid, smoke, catch fire or explode.

(3) Short circuit protection. If a short circuit occurs at the output end of the battery pack, the circuit will be instantly cut off and an alarm will be triggered. The battery pack should not leak liquid, smoke, catch fire or explode; After troubleshooting, it is possible to manually restore operation

(4) Overload protection. When the charging and discharging current of the battery pack reaches the overload protection current value, the circuit can be cut off and an alarm can be triggered. The battery pack should not leak liquid, smoke, catch fire or explode; After troubleshooting, it should be able to automatically resume operation;

7. Monitoring function

(1) Communication interface. The battery pack has an RS485 standard communication interface and supports the standard Modbus protocol. The protocol is detailed in Appendix 1: Communication Protocol.

(2) Monitoring content. The battery pack has the following real-time monitoring functions, which can transmit data to the backend host. Battery pack capacity (SOC), battery pack/cell voltage, battery pack current, battery pack overcharge/overcurrent alarm, battery pack discharge undervoltage/overcurrent alarm, battery cell charging overvoltage alarm, battery cell discharge undervoltage alarm, environmental low temperature alarm, and battery pack capacity low alarm.