Voltage measuring device and voltage measuring system

• US 20080203976A1
• Filed: 02/27/2008
• Published: 08/28/2008
• Est. Priority Date: 02/28/2007
• Status: Active Grant

• Current Assignee: Yazaki Corporation
• Original Assignee: Yazaki Corporation
• Inventors: Ishikawa, Satoshi, Ooishi, Manabu
• Granted Patent: US 8,154,300 B2
• Time in Patent Office: Days
• US Class Current: 320/162
• CPC Class Codes: G01R 31/396 Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

In a voltage measuring device, according to a setting of input terminals for setting the number of unit cells to be measured SEL1, SEL2, SEL3, a logic circuit turns on switches in a switching circuit connected to the unit cells to measure a voltage across each unit cell.

Claims

1. A voltage measuring device comprising:

a voltage measuring member for measuring a voltage- across each unit cell in a block having at least one unit cell of an on vehicle high voltage battery in which the unit cells are connected to each other in series; and

a connecting member mounted on each unit cell to connect each unit cell to the voltage measuring member,

wherein the connecting member includes;

a setting member to set the number of the unit cells to be connected to the voltage measuring member; and

a controlling member to connect the connecting member to the voltage measuring member based on the number of the unit cells set by the setting member.

2. The voltage measuring device as claimed in claim 1, further comprising a battery generating member to generate and supply a specific voltage from an inputted voltage,

wherein the unit cell having a top voltage among the unit cells in the block is inputted into the battery generating member, and the battery generating member generates and outputs the specific voltage from the top voltage.

3. The voltage measuring device as claimed in claim 2, further comprising a voltage switching member for inputting the top voltage into the battery generating member based on the number of the unit cells set by the setting member.

4. The voltage measuring device as claimed in claim 1, further comprising an address setting member to set a unique address to each block.

5. A voltage measuring system,

wherein the voltage measuring device as claimed in claim 1 is mounted on each block of the on vehicle high voltage battery which is divided to at least two blocks each having at least one unit cell.