A method for automatically numbering vehicle lithium ion battery boxes

Abstract

The invention discloses a method for automatically numbering vehicle lithium ion battery boxes. The method comprise a numbering host, at least two battery boxes with slaves and an RS-485 bus. signaltransmission devices are respectively connected between the numbering host and the slave machines of the first battery box and between the slave machines of the rest battery boxe in sequence; When theslave machines of the battery box need to distribute addresses for numbering; the numbering host sends a first address to the first slave through the signal transmission device; and after receiving the first address, the slave machine of the first battery box configures the address of the slave machine as the first address and stores the first address, then sends the first address + 1 to the slave machine of the next battery box through a signal transmission device between the slave machines of the battery box, and so on until the slave machines of all the rest battery boxe are distributed. The slave addresses can be quickly distributed, and the distributed slave addresses and the physical connection have a fixed corresponding relation.

Description

technical field [0001] The invention relates to a method for automatic numbering of lithium-ion battery boxes for vehicles. Background technique [0002] In the Modbus RTU bus protocol based on the RS-485 bus, there is a master and several slaves, and each slave needs to be assigned a different address. There is no method for automatically assigning slave addresses in the standard protocol, and manual assignment is generally used. . Some products adopt the method of automatic distribution, generally adopt the method of random time slot scanning. If it is a system based on CAN and LIN architecture, if multiple identical nodes are connected together, addresses will be automatically assigned, but there is no way to distinguish each node. [0003] When using the method of manually assigning the slave address, it needs to set the address through additional hardware, or it can be connected to the system after configuring the address through the host computer alone; when using ra...

AI Technical Summary

Problems solved by technology

If it is a system based on CAN and LIN architecture, if multiple identical nodes are connected together, addresses will be automatically assigned, but there is no way to distinguish each node

[0003] When using the method of manually assigning the slave address, it needs to set the address through additional hardware, or it can be connected to the system after configuring the address through the host computer alone; when using random time slot scanning to assign the slave address Method: It takes a long time, especially when there are many slaves, it may take ten to twenty seconds; the assigned address is random, and it cannot be used when there is a clear correspondence between the slave and the address; when using CAN, In the LIN architecture system, since each battery box is the same, it is necessary to assign addresses to the CAN and LIN nodes of each battery box in advance, so that the host computer can distinguish which battery box the data comes from

Images