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Rawsun battery management system series products accurately collect the total battery pack voltage, voltage and temperature of each single battery, and calculate the SOC and SOH equivalent of each single battery, and transfer the corresponding information to the main control of the battery management system, so as to realize the battery management of the whole vehicle. Through the in-depth analysis and calculation of SOC, voltage and temperature equivalence of the battery, the corresponding balancing strategy is adopted to balance the battery with higher capacity, improve the utilization rate of the battery, maintain the battery state, and extend the battery life. The system adopts a distributed system architecture, and the whole system is composed of a central management unit (host) and multiple battery management units (slave). The internal communication adopts CAN bus, which is associated with the whole vehicle controller, motor controller, battery and other parts through CAN bus. Among them, in the actual battery pack, each battery module is equipped with a monitoring unit of battery module (slave machine). The main machine is installed in the battery box, and one main machine can be connected to multiple slave machines.

Technical characteristics

1) complete protection: take multiple protection measures to protect the battery in case of over-voltage, under-voltage, over-current, over-temperature and collision;

2) simple interface: the connector is simple and reliable, and only output power line, communication line and control line externally;

3) fault location: accurately locate the fault location and type of the system to shorten the system maintenance time;

4) data preservation: data record storage is complete and reliable, with the function of data black box, data storage encryption and image backup;

5) support the detection of battery pack voltage and current;

6) support the monitoring of insulation resistance of battery pack;

7) support local storage of system operation data (4G);

8) support CAN communication with EVBMM, charger, vehicle controller, etc.;

9) support charging management of quick charge and slow charge of battery pack;

10) support debugging and display information output;

11) support abnormal alarm of voltage, current, temperature, insulation resistance, SOC, SOH, etc.;12) circuit cutting off signal output that supports limit alarm;

13) support self-inspection of power supply;

14) support local clock information;

15) support whole-process monitoring of battery pack status;

16) support monomer voltage and temperature detection;

17) support thermal management;

18) safe operation strategy of the vehicle and battery pack in case of failure;

19) support module overtemperature, power supply input reverse connection, undervoltage, overcurrent protection;

20) single SOC/SOH calculation is supported;

21) support thermal management;

22) by using energy consumption balancing technology, multiple single batteries in the battery pack can be discharge balancing at the same time, and the balance energy of the single battery can be measured;

23) support power off and low power consumption mode;

24) support reverse connection, undervoltage and overcurrent protection of power supply input;

25) support battery connection wire reverse connection, miss connection, short circuit protection, module over-temperature and internal fault protection;

26) support remote management (GPS/GPRS) positioning and upgrade maintenance functions.

The system adopts the design of strong reliability and high redundancy to provide system reliability and stability. The product has passed the strict performance test, environmental reliability test, electromagnetic compatibility test, working condition simulation and on-board test, and has reliable quality assurance.