Voltage measuring apparatus
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsAkira Kawabe, Gorou Mori
Life of this patent
Estimating the term…
Abstract
A voltage measuring apparatus is configured to measure voltages of respective battery cells of a battery cell array including a plurality of battery cell groups each including a predetermined number of battery cells connected in series. The voltage measuring apparatus includes a plurality of measuring units each provided for each of the battery cell groups. The adjacent measuring units are connected through a communication channel so as to perform current communication therebetween. A bidirectional diode circuit element is connected to the communication channel extending between the adjacent measuring units.
Claims30
An integrated circuit device provided at each of a plurality of battery cell groups of a battery system including a battery cell array including the plurality of battery cell groups,
- the integrated circuit device comprising a measuring unit configured to measure a voltage of one of battery cells of a corresponding one of the battery cell groups, wherein:
- when the measuring unit is a measuring unit at a high potential side, and a measuring unit of an adjacent integrated circuit device is a measuring unit at a low potential side,
- the measuring unit at the low potential side is configured to receive (i) a current for first communication by which the measuring unit at the low potential side receives a measurement result of the voltage of the one battery cell, the voltage being measured by the measuring unit at the high potential side or (ii) a current for second communication by which the measuring unit at the low potential side transmits a drive command to the measuring unit at the high potential side, and
- in at least one of the first communication and the second communication, the measuring unit at the high potential side allows an input of a reverse current, the reverse current flowing in a direction opposite to a direction of the current for a corresponding one of the first communication and the second communication.
A battery system comprising:
- a battery cell array including a plurality of battery cell groups each including a predetermined number of battery cells connected in series;
- and
- a voltage measuring apparatus configured to measure voltages of the respective battery cell groups, wherein:
- the voltage measuring apparatus includes a plurality of measuring units each provided for each of the battery cell groups;
- each of the plurality of measuring units measures voltages of the battery cells of a corresponding one of the battery cell groups;
- and
- when one of the plurality of measuring units is a measuring unit at a high potential side, and a measuring unit adjacent to the measuring unit at the high potential side is a measuring unit at a low potential side,
- the measuring unit at the low potential side is configured to receive (i) a current for first communication by which the measuring unit at the low potential side receives a measurement result of the voltages of the battery cells of the battery cell group, the voltages being measured by the measuring unit at the high potential side or (ii) a current for second communication by which the measuring unit at the low potential side transmits a drive command to the measuring unit at the high potential side, and
- in at least one of the first communication and the second communication, the measuring unit at the high potential side allows an input of a reverse current, the reverse current flowing in a direction opposite to a direction of the current for a corresponding one of the first communication and the second communication.
Dependencies are inferred from the claim text.