# US 2015/0177291 A1 · Shunt resistance type current sensor

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2015/0177291 A1
- Document ID: US20150177291A1
- Status: Published application
- Kind: A1
- Application number: 14/413,551
- Filed: 2013-06-19
- Published: 2015-06-25
- Earliest claimed: 2012-07-11
- Assignees: Yazaki Corporation
- Applicants: Yazaki Corporation
- Inventors: Emi Kageyama; Takashi Sato
- Web page: https://patentgrep.com/patent/US20150177291A1

## CPC

- G01R 19/32: Compensating for temperature change
- G01R 1/203: {Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts (resistors in general H01C; microwave or radiowave terminations H01P1/26; coupling devices H01R)}
- G01R 15/146: {Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop (if no voltage isolation is involved G01R1/203 or G01R19/0092)}
- G01R 31/364: Battery terminal connectors with integrated measuring arrangements
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)

## Abstract

A shunt resistance type current sensor includes a bus bar that is a path of an electric current to be measured, a circuit board that is installed over the bus bar, a pair of connecting members that electrically connect the circuit board with the bus bar, a voltage detection unit that is provided on the circuit board and detects a voltage value applied to the circuit board through the pair of connecting members so as to calculate a level of the electric current flowing through the bus bar, and a temperature sensor that is provided on the circuit board to face the bus bar and detects a temperature of the bus bar to allow the voltage detection unit to perform a correction regarding the calculation of the level of the electric current.

## Claims

### Claim 1

A shunt resistance type current sensor comprising:
a bus bar that is a path of an electric current to be measured;
a circuit board that is installed over the bus bar;
a pair of connecting members that electrically connect the circuit board with the bus bar;
a voltage detection unit that is provided on the circuit board and detects a voltage value applied to the circuit board through the pair of connecting members so as to calculate a level of the electric current flowing through the bus bar; and
a temperature sensor that is provided on the circuit board to face the bus bar and detects a temperature of the bus bar to allow the voltage detection unit to perform a correction regarding the calculation of the level of the electric current;
wherein the voltage detection unit includes a temperature detection portion for detecting the temperature of the bus bar, and determines an abnormality of the temperature sensor based on the temperature detected by the temperature detection portion and the temperature detected by the temperature sensor.

### Claim 2 (depends on 1)

The shunt resistance type current sensor according to claim 1, wherein the voltage detection unit determines that the temperature sensor is abnormal, when a difference between the temperature detected by the temperature detection portion and the temperature detected by the temperature sensor is greater than a predetermined value.

### Claim 3 (depends on 1)

The shunt resistance type current sensor according to claim 1, wherein, when the voltage detection unit determines that the temperature sensor is abnormal, the voltage detection unit outputs the calculated level of the electric current and the abnormality of the temperature sensor to an upper-level apparatus.

### Claim 4 (depends on 1)

The shunt resistance type current sensor according to claim 1 further comprising a high thermal conductivity material that is disposed between the bus bar and the circuit board to thermally connect the bus bar and the circuit board.