Voltage measuring apparatus
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsAkira Kawabe, Gorou Mori
Life of this patent
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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.
Claims16
An integrated circuit device provided at each of a plurality 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 voltages of a plurality of battery cells of a corresponding one of the battery cell groups, wherein:
- the measuring unit includes
- a power supply voltage line to which a power supply voltage of the corresponding battery cell group is applied,
- a reference voltage line to which a reference voltage of the corresponding battery cell group is applied, and
- a Gate Grounded N-channel MOS transistor connected to the power supply voltage line or the reference voltage line;
- and
- the Gate Grounded N-channel MOS transistor is configured to prevent the integrated circuit device from being broken by a flow of a current through the measuring unit, the current being generated by static electricity.
Dependencies are inferred from the claim text.