Data interface conversion system based on dual-CPU

Abstract

The invention belongs to the technical field of data transmission of battery pack equalization management systems, and particularly relates to a data interface conversion system based on dual-CPU. Thedata interface conversion system comprises an upper data processing unit, a lower data processing unit, an upper data exchange unit, a lower data exchange unit, a main power supply unit, a communication power supply unit and a CPU power supply unit. The circuit structure is simple and reliable, the cost is low, by adoption of the circuit structure connection mode in which the upper data processing unit is connected with the upper data exchange unit, the lower data processing unit is connected with the lower data exchange unit, and the upper data processing unit and the lower data processing unit are connected with each other, the following situation in the prior art is overcome: when a data transmission protocol of upper computer software is readable and non-writable, the conversion system using a single CPU may have insufficient data transmission response, frame loss, easy crash and other shortcomings. When a handshake protocol of the upper computer software is non-writable, the lower transmission data can be quickly responded to and accurately processed.

Description

technical field [0001] A data interface conversion system based on dual CPUs belongs to the technical field of data transmission of battery pack balance management systems. Background technique [0002] The data transmission of the battery pack balance management system usually adopts CAN communication or RS485 communication. For the battery pack balance management system with many nodes, CAN communication has the advantages of strong real-time multi-node communication, short development cycle, and simple wiring. It replaces RS485 communication. It has become the preferred communication method for data transmission in the current battery pack balancing system. However, for a battery pack balancing management system with fewer nodes, the cost of data transmission using CAN communication is relatively high and the advantages are not obvious compared with 485 communication. RS485 communication has the characteristics of balanced transmission, differential reception and high co...

AI Technical Summary

Problems solved by technology

[0003] When the data of the battery pack balance management system is uploaded to the host computer, it is generally carried out through an internal or external data interface conversion system. The more common one is the RS485 to USB interface conversion system. When the host computer software data transmission protocol can be read and written, this This kind of data interface conversion system adopts a single CPU design, and the response speed is faster, but when the host computer software data transmission protocol is readable but not writable, the above conversion system using a single CPU will have data transmission response not in time, frame loss, and easy to crash And other problems, it is easy to cause deviations when the upper computer software and the lower battery pack equalization management system perform data docking, which will lead to equalization malfunctions and cause safety hazards

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