# US 9,753,091 B2 · Voltage detecting device

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- Number: US 9,753,091 B2
- Document ID: US9753091B2
- Status: Granted
- Kind: B2
- Application number: 14/702,074
- Filed: 2015-05-01
- Published: 2015-11-19
- Granted: 2017-09-05
- Earliest claimed: 2014-05-15
- Assignees: Keihin Corporation
- Applicants: Keihin Corporation
- Inventors: Seiji Kamata
- Web page: https://patentgrep.com/patent/US9753091B2

## CPC

- G01R 31/396: Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
- B60L 58/10: for monitoring or controlling batteries
- G01R 31/3835: involving only voltage measurements
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

Disclosed herein is a voltage detecting device including: an analog converting circuit configured to level-convert voltages of a plurality of battery cells constituting a battery into low voltages; a digital converting circuit configured to convert the low voltages output by the analog converting circuit into digital values; and a control circuit configured to be driven by a power supply provided separately to control the digital converting circuit; the analog converting circuit being driven by a first power generated from the plurality of battery cells, and the digital converting circuit being driven by a second power generated on a basis of a pulse signal generated by the control circuit.

## Claims

### Claim 1

A voltage detecting device comprising:
an analog converting circuit configured to level-convert voltages of a battery comprising plurality of battery cells into low voltages;
a digital converting circuit configured to convert the low voltages output by the analog converting circuit into digital values; and
a control circuit configured to be driven by a power supply provided separately to control the digital converting circuit;
wherein the analog converting circuit is driven by a first power generated from the plurality of battery cells, and
wherein the digital converting circuit is driven by a second power generated on a basis of a pulse signal generated by the control circuit.

### Claim 2 (depends on 1)

The voltage detecting device according to claim 1, further comprising
a smoothing circuit configured to generate the second power by smoothing the pulse signal generated by the control circuit.

### Claim 3 (depends on 2)

The voltage detecting device according to claim 2,
wherein the pulse signal is a modulated signal including control information for the digital converting circuit.

### Claim 4 (depends on 3)

The voltage detecting device according to claim 3,
wherein the modulated signal is a pulse width modulation signal indicating the control information as a duty ratio.

### Claim 5 (depends on 2)

The voltage detecting device according to claim 2,
wherein the pulse signal is supplied from the control circuit to the smoothing circuit via a pulse transformer.