Method for transmitting data

The invention discloses a method for transmitting data between a battery management system and at least one related equipment in the form of a data frame. The method for transmitting data comprises the following steps: sending the head of the data frame by source equipment to obtain the right of controlling a single-wire bidirectional communication line, and determining the target equipment of the data frame; sending the specific content data bytes in the data frame to the target equipment from the source equipment; completing the transmission of the data frame and releasing the right of controlling the single-wire bidirectional communication line if the confirmation message returned by target equipment is received in the scheduled time, and resending the data frame if the confirmation message returned by target equipment is not received in the scheduled time. According to the method for transmitting data, the single-wire bidirectional communication between the battery management system and other related equipment is realized, the idle terminal of the prior charging port can be utilized to realize communication, and flexible data frame self definition is realized. The method for transmitting data has the advantages of low cost, good data safety performance, high confidentiality, low-speed communication and high reliability.