Low-voltage management system and method of distributed battery management system

Abstract

The invention discloses a low-voltage management system of a distributed battery management system. The low-voltage management system comprises a master control unit, a plurality of slave control units controlled by the master control unit and a group of power supply circuit, wherein the power supply circuit connects the master control unit and the slave control units in parallel to a power supply output end of a finished vehicle controller; a main node and a plurality of branch nodes are designed on the power supply circuit; the main node is connected with the master control unit to directly power the master control unit; any branch node is independently connected to one slave control unit to directly power the slave control unit simultaneously. The synchronism between low-voltage powering on and powering off of the distributed battery management system and the finished vehicle controller is realized, and meanwhile, the synchronism between low-voltage power supply powering on and powering off of each node in the distributed battery management system is realized.

Description

technical field [0001] The invention relates to the field of battery management, in particular to a low-voltage management system and method of a distributed battery management system. Background technique [0002] Generally speaking, the low-voltage connection, power-on and power-off management of the existing distributed battery management system is to use the working power of each sub-node of the system to be provided by the main node. After the main node is powered off at low voltage, the sub-nodes are powered off at the same time. , this connection method has the following disadvantages: the working current consumed by all sub-nodes must pass through the main node, which may cause the current overload of the main node, and due to different application designs, the number of sub-nodes in the system is inconsistent. It is difficult to determine the current overload parameters of the main node; the power supply of each sub-node is completely controlled by the main node...

AI Technical Summary

Problems solved by technology

[0002] Generally speaking, the low-voltage connection, power-on and power-off management of the existing distributed battery management system is to use the working power of each sub-node of the system to be provided by the main node. After the main node is powered off at low voltage, the sub-nodes are powered off at the same time. , this connection method has the following disadvantages: the working current consumed by all sub-nodes must pass through the main node, which may cause the current overload of the main node, and due to different application designs, the number of sub-nodes in the system is inconsistent. It is difficult to determine the current overload parameters of the main node; the power supply of each sub-node is completely controlled by the main node, and it is impossible to realize its own low-voltage power management. For example, sub-nodes need to save necessary data before powering off at low voltage, and turn off some devices, etc.

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