Digital current sharing method of a vehicle-mounted power supply module

Abstract

The invention provides a digital current sharing method of a vehicle-mounted power supply module, which is characterized in that: the parallel vehicle-mounted power supply module sends respective communication IDs, working states and current output currents to a CAN bus; the power supply module with the smallest communication ID is a master module, and the other vehicle-mounted power supply modules are slave modules; the parallel vehicle-mounted power supply module sends respective communication IDs, working states and current output currents to a CAN bus. The slave module adjusts its own output voltage according to the received output current value of the master module, so that the output current value of the slave module is adjusted to the output current value of the received master module. If a module fails, the current sharing method automatically exits the system, which has no influence on the current system, and solves the problem that the current sharing control of the system collapses due to the fault of the current sharing controller or the fault of the host module in the prior digital current sharing technology.

Description

technical field [0001] The invention relates to the technical field of vehicle power supplies, in particular to a digital current sharing method for a vehicle power supply module. Background technique [0002] In the field of vehicle power supplies, it is a very important technology to use multiple power modules in parallel to achieve high power output. The parallel connection of power modules has the advantages of easy expansion, good compatibility, redundant backup, high reliability, and high cost performance. [0003] However, the current digital current sharing technology can only be realized through an external current sharing controller (such as a monitoring module). Once the external current sharing controller fails, the entire current sharing control will collapse, which will have a serious impact on the operation of the system. Therefore, there is an urgent need for a convenient, fast, reliable and safe digital current sharing method. [0004] In order to solve the...

AI Technical Summary

Problems solved by technology

[0003] However, the current digital current sharing technology must be realized through an external current sharing controller (such as a monitoring module). Once the external current sharing controller fails, the entire current sharing control will collapse, which will have a serious impact on the operation of the system.

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