DAISY CHAIN COMMUNICATION BUS AND PROTOCOL

摘要

A battery pack has first and second battery terminals, plural battery cells each with a battery element, a cell supervisor electrically connected to the battery element, and a communication section to communicate with the cell supervisor. The battery elements are connected serially between the first and second battery terminals. Bus interfaces are arranged in alternating fashion with the battery cells to define a daisy chain bus, each such bus interface being configured for signal communication, the interfaces respectively connecting the communication sections of two adjacent battery cells. A battery manager communicates with the battery cells via the daisy chain bus. The battery manager sends a command message to the battery cells using a through mode protocol, and each battery cell sends at least one of a confirmation message and a service request to the battery manager using a shift mode protocol.

主权项

1. A battery pack, comprising:
a first battery terminal and a second battery terminal; a plurality of battery cells, each said battery cell comprising;
a battery element;a cell supervisor electrically connected to the battery element; anda communication section configured to communicate with the cell supervisor;wherein all of said battery elements are connected serially between the first battery terminal and the second battery terminal; a plurality of bus interfaces arranged in alternating fashion with said battery cells to define a daisy chain bus, each said bus interface configured for signal communication, each said bus interface respectively connecting the communication sections of two adjacent said battery cells; and a battery manager configured to communicate with said battery cells via the daisy chain bus, wherein the battery pack is configured so that the battery manager sends a command message to the battery cells using a through mode protocol, and each said battery cell sends at least one of a confirmation message and a service request to the battery manager using a shift mode protocol.