Communication fault judgment and treatment method of battery management system of hybrid electric vehicle
A battery management system and a technology for hybrid electric vehicles, which are applied in hybrid electric vehicles, electric vehicle charging technology, electric vehicles, etc., can solve the problem that the vehicle controller cannot normally receive real-time data signals, which affects the safe driving of vehicles, and the safety of drivers and passengers. security issues, etc.
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Embodiment 1
[0043] A method for judging and processing communication faults of a battery management system of a hybrid electric vehicle, the judging and processing procedures are as follows figure 2 As shown, the specific steps are as follows:
[0044] S1: The battery data processing module of the vehicle controller receives the data signal sent by the battery management system every certain time T0. T0 is 10ms~50ms. In N communication cycles, N is 3~5. If the battery data processing module can receive the data signal sent by the battery management system, it can be judged that the communication of the battery management system is normal. Power P bat_actl and the actual power of the battery P bat_actl And the real-time received battery state of charge SOC, battery allowable charging power P bat_chg and battery allowable discharge power P bat_dchg The power distribution and battery protection control module transmitted to the vehicle controller is executed; if the battery data process...
Embodiment 2
[0059] A method for judging and processing a communication failure of a battery management system of a hybrid electric vehicle, the steps of which are similar to those of the method for judging and processing a communication failure of a battery management system of a hybrid electric vehicle in Embodiment 1, the difference being that in step S2 , the actual power P of the first motor E1_actl and the actual power P of the second motor E2_actl The sum can also be calculated according to formula (8),
[0060] P E1_actl +P E2_actl =(n Ho ×T Ho -n VM ×T VM ) / (9550×η sys )……(8),
[0061] Among them, n Ho is the transmission output shaft speed, T Ho is the transmission output shaft torque, n VM is the actual speed of the engine, T VM is the actual torque of the engine, η sys For the working efficiency of the hybrid transmission.
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