Cell management system upgrade method based on CAN bus

The invention relates to a cell management system upgrade method based on a CAN bus. The method comprises steps that, 1, upgrade files are selected according to a to-be-upgraded module, and the size of the files is calculated; 2, an upgrade address is calculated according to the size of the upgrade files, and a to-be-upgraded address content is erased; if the to-be-upgraded address content is erased successfully, the upgrade files are packaged by a host and are sent to the to-be-upgraded module one frame by one frame, determination frames are fed back by the to-be-upgraded module according to data of each frame, otherwise, the to-be-upgraded address content is re-erased; 4, if issuing success of data frames is determined by the host according to the determination frames, the upgrade files are sent to the to-be-upgraded module continuously till all are issued, after the to-be-upgraded module is upgraded wholly, an upgrade determination frame is sent to the host, otherwise, the data frames are re-sent; and 5 if upgrade success of the to-be-upgraded module is determined by the host according to the upgrade determination frame, the upgrade process is over, otherwise, the data frames are sent continuously. Through the method, upgrade can be carried out without the need for dismounting a casing, and work efficiency is improved.