A BMS circular daisy chain communication fault handling method

Abstract

The present invention discloses a ring-shaped daisy chain communication fault handling method, system and vehicle of a BMS, including the steps: (S1) the BMS is woken up and powered on, (S2) judging whether the cumulative number of configured CIDs exceeds the first preset number, if The cumulative number of reconfigured CIDs does not exceed the first preset number of times, configure the single sampling chip CID, and judge whether all single sampling chip CIDs are configured successfully, if the configuration is not successful, return to the execution step (S2); if the configuration is successful, Initialize all single sampling chip registers, and judge whether the initialization of single sampling chip registers is successful. If successful, read the single sampling chip data for the first time and judge whether the reading is normal. If normal, periodically read the single sampling chip data, the process ends. Through the fault handling method, it is possible to handle faults that occur during the operation of the daisy chain communication, which not only improves the stability and robustness of the daisy chain communication, but also improves user experience.

Description

A kind of BMS ring daisy chain communication fault handling method technical field The present invention relates to the technical field of battery management system controller (BMS), in particular to a kind of annular daisy chain of BMS Communication failure handling method. Background technique With the development of BMS technology, the communication between the single sampling chips of BMS is developed from CAN communication to daisy chain communication [0002] Communication has become a trend. Compared with CAN communication, daisy chain communication has a huge cost advantage. Among them, the wiring harness connection is one of the most unstable systems. Since the communication mode of daisy-chain communication is cascade communication, it can communicate with CAN. The broadcast communication of the letter is different. When there is a communication problem with any single sampling chip in the daisy chain communication, the problem core The information of this ...

AI Technical Summary

Problems solved by technology

[0002] With the development of BMS technology, the communication between single sampling chips of BMS has developed from CAN communication to daisy chain communication. It has become a trend. Compared with CAN communication, daisy chain communication has a huge advantage in cost. In practical application Among them, the wiring harness connection is one of the most unstable systems. Since the communication mode of the daisy chain communication is cascade communication, which is different from the broadcast communication of CAN communication, when any single sampling chip communication problem occurs in the daisy chain communication, This problem chip and the information after this chip cannot be obtained. If no countermeasures are taken, it will not be able to recover within a power-on cycle. This problem will cause failures such as power interruption of the whole vehicle.

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