Current detecting device

• US 8,624,600 B2
• Filed: 01/31/2011
• Issued: 01/07/2014
• Est. Priority Date: 01/29/2010
• Status: Expired due to Fees

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Teramoto, Toshiyo, Ozawa, Jyun
• Primary Examiner(s): Vazquez, Arleen M
• Assistant Examiner(s): ALLGOOD, ALESA M
• Application Number:
  US13/017,604
• Publication Number:
  US 20110187346A1
• Time in Patent Office: 1,072 Days
• Field of Search: 324/76.11, 324/348, 324/357, 324/354, 320/119, 320/132, 320/136
• US Class Current: 324/354
• CPC Class Codes: 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
• CPC Class Codes: G01R 19/00 Arrangements for measuring currents or voltages or for indicating presence or sign thereof G01R5/00 takes precedence; for measuring bioelectric currents or voltages A61B5/24
• CPC Class Codes: G01R 31/364 Battery terminal connectors with integrated measuring arrangements
• CPC Class Codes: H01M 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569

Abstract

A current detecting device includes a second fixed part to which the harness is fixed and electrically connected, a bus bar as a resistor inserted between a first fixed part and the second fixed part, a circuit board in which a current detection circuit is mounted, the current detection circuit detecting current flowing through the bus bar based on a potential difference between two points along an energizing direction of the bus bar, and a case accommodating the bus bar and the circuit board. The second fixed part to which the harness is fixed and electrically connected is disposed within a battery upper surface area.

Claims

1. A current detecting device that detects a current flowing through a battery terminal to a harness comprising:

a fixed part to which the harness is fixed and electrically connected;

a resistor inserted between the battery terminal and the fixed part;

a circuit board in which a current detection circuit is mounted, the current detection circuit detecting current flowing through the resistor based on a potential difference between two points along an energizing direction of the resistor; and

a case housing the resistor and the circuit board, wherein, the fixed part to which the harness is fixed and electrically connected is disposed within a battery upper surface area, and the fixed part is disposed within a circular area that is within the battery upper surface area and has a radius from the center of the battery terminal that is a radius of the battery terminal multiplied by a predetermined value.

2. The current detecting device according to claim 1, wherein, the predetermined value is 3.5.

3. The current detecting device according to claim 1, wherein,

the fixed part is any of a bolt that is attached and fixed, an attaching hole that is formed in a penetrating manner, and a crimped terminal.

4. The current detecting device according to claim 1, wherein,

attachment is performed in a state in which the lower surface of the fixed section is in contact with the battery upper surface.

5. The current detecting device according to claim 1, wherein,

the resistor has a non-linear shape.

6. The current detecting device according to claim 5, wherein,

the non-linear shape is a shape that is folded back midway and of which at least a portion is overlapping.

7. The current detecting device according to claim 5, wherein,

the non-linear shape is a C-shape or an L-shape.

8. The current detecting device according to claim 1, wherein,

a cut-out section is formed in the case within the battery upper surface area,

the battery terminal and the fixed part are each provided such as to oppose the cut-out section, and

a terminal provided in the battery within the battery upper surface area is disposed in the cut-out section.

9. The current detecting device according to claim 8, wherein,

the battery terminal and the fixed part are each provided in a position adjacent to the cut-out section.