BATTERY-STATE MONITORING APPARATUS

• US 20110119005A1
• Filed: 07/07/2009
• Published: 05/19/2011
• Est. Priority Date: 07/11/2008
• Status: Active Grant

• Current Assignee: Mitsumi Electric Co., Ltd. (MinebeaMitsumi Inc.), NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: Mitsumi Electric Co., Ltd. (MinebeaMitsumi Inc.), NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Takahashi, Mitsuhiro, Takeno, Kazuhiko, Kanai, Takayuki, Uemura, Haruo, Kanai, Yasuyuki, Majima, Yoshihide
• Granted Patent: US 8,996,324 B2
• Time in Patent Office: Days
• US Class Current: 702/63
• CPC Class Codes: G01R 31/3648 comprising digital calculation means, e.g. for performing an algorithm
• CPC Class Codes: G01R 31/3828 using current integration
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• 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
• CPC Class Codes: H01M 10/486 for measuring temperature
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A battery-state monitoring apparatus includes: a secondary battery 200 supplying an electric power to portable equipment 300; and an operation processing part 50 that can detect a battery state of the secondary battery 200 in a detection mode to detect the battery state of the secondary battery 200, the operation processing part using the secondary battery 200 as a power source, wherein the battery-state monitoring apparatus includes a start-up current detecting part 31 detecting a start-up of the portable equipment 300, and wherein the operation processing part 50 waits for a detection of the battery state in a standby mode in which power consumption is smaller than the detection mode until the start-up is detected by the start-up current detecting part 31, and, on the other hand, the operation processing part 50 detects, by intermittently performing a temporary return from the standby mode to the detection mode, the battery state of the secondary battery in a return period during which the return is made.

Claims

1. A battery-state monitoring apparatus, comprising:

a secondary battery supplying an electric power to an electric load; and

a state detecting part detecting a battery state of said secondary battery in a detection mode to detect the battery state of said secondary battery, the state detecting part using said secondary battery as a power source,

wherein said battery-state monitoring apparatus includes a start-up detecting part detecting a start-up of said electric load, and

wherein said state detecting part waits for a detection of said battery state in a standby mode in which a power consumption is smaller than said detection mode until said start-up is detected by said start-up detecting part, and, on the other hand, said state detecting part detects, by intermittently performing a temporary return from said standby mode to said detection mode, said battery state in a return period during which said return is made.

2. The battery-state monitoring apparatus as claimed in claim 1, wherein said state detecting part detects a remaining amount of charge of said secondary battery as said battery state.

3. The battery-state monitoring apparatus as claimed in claim 2, wherein said state detecting part detects, during said return period, the remaining amount of charge of said secondary battery by subtracting an integration value from said remaining amount of charge detected in said detection mode prior to said return period, the integration value acquired by integrating a current consumption value of said electric load with a standby time to standby in said standby mode after the detection mode.

4. The battery-state monitoring apparatus as claimed in claim 3, wherein the current consumption value of said electric load is stored in a memory.

5. The battery-state monitoring apparatus as claimed in claim 3, wherein, in association with the start-up of said electric load, said start-up detecting part detects as said start-up a fluctuation in a current generated in a power supply path between said electric load and said secondary battery, and also detects the current consumption value of said electric load.

6. The battery-state monitoring apparatus as claimed in claim 1, wherein, in association with the start-up of said electric load, said start-up detecting part detects as said start-up a fluctuation of a current or a voltage generated in a power supply path between said electric load and said secondary battery, and also detects the current consumption value of said electric load.