Halbleiterbauelement und Batteriespannungsüberwachungsvorrichtung

Details

Veröffentlichungs-Nr.

EP2700965

Aktenzeichen

EP13179215

Anmeldetag

5. August 2013

Veröffentlichung

7. Oktober 2020

Erteilung

7. Oktober 2020

Rechtsraum

EP

IPC

G01R31/36G01R19/165H02J7/00

Abstract

A semiconductor device is provided for measuring voltage of each of plural unit cells series-coupled in multi-stage and configuring an assembled battery. While satisfying the functional safety standards with dual-redundancy of the function of battery voltage monitoring and fault monitoring, the semiconductor device can realize the measurement of a battery voltage, the detection of overcharge/overdischarge, and the detection of disconnection between a node of unit cells and a terminal, the latter two being the function of fault monitoring, in a circuit formed on a single semiconductor substrate. The semiconductor device is provided with two terminals to be coupled to two nodes which are both electrodes of a unit cell and are coupled with other unit cells in plural unit cells configuring an assembled battery, and a voltage measurement circuit which measures the inter-terminal voltage between the two terminals. The semiconductor device is provided with a down-convert level shifter circuit which converts the inter-terminal voltage into a low-potential-side inter-terminal voltage on the basis of a ground potential, and a comparator circuit which compares the converted low-potential-side inter-terminal voltage with a predetermined reference voltage. The semiconductor device is also provided with an up-convert level shifter circuit which converts a low-potential-side shunt control signal on the basis of the ground potential into a high-potential-side shunt control signal, and a switch which short-circuits the two terminals via a resistor on the basis of the converted high-potential-side shunt control signal.

Anmelder

Firma

Renesas Electronics Corporation

Land

🇯🇵 Japan

Fachgebiete