Battery monitoring and control integrated circuit and battery system

• US 9,356,453 B2
• Filed: 12/20/2011
• Issued: 05/31/2016
• Est. Priority Date: 12/20/2011
• Status: Active Grant

• Current Assignee: Hitachi Astemo Ltd. (Hitachi, Ltd.)
• Original Assignee: Hitachi Automotive Systems Limited (Hitachi, Ltd.)
• Inventors: Kudo, Akihiko, Kikuchi, Mutsumi, Emori, Akihiko, Machida, Akihiro
• Primary Examiner(s): Memula, Suresh
• Application Number:
  US14/367,739
• Publication Number:
  US 20150155722A1
• Time in Patent Office: 1,624 Days
• Field of Search: 320/116
• US Class Current: 1/1
• CPC Class Codes: H02J 7/0014 Circuits for equalisation of charge between batteries
• CPC Class Codes: H02J 7/0016 using shunting, discharge or bypass circuits
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A battery monitoring and control integrated circuit is connected to a cell group having a plurality of series-connected single cells for monitoring and controlling the single cells, and includes: a first start input terminal for connecting to a DC signal generation circuit which generates a DC signal based on an AC start signal input from the outside; a start detection unit which detects the DC signal and activates the battery monitoring and control integrated circuit; and a start output unit which outputs the AC start signal to the outside after the activation of the battery monitoring and control integrated circuit.

Claims

1. A battery monitoring and control integrated circuit which is connected to a cell group having a plurality of series-connected single cells, and which monitors and controls the single cells, the battery monitoring and control integrated circuit comprising:

a first start input terminal for connecting to a DC signal generation circuit which generates a DC signal based on an AC start signal input;

a start detection unit which detects the DC signal and activates the battery monitoring and control integrated circuit; and

a start output unit which outputs the AC start signal after the activation of the battery monitoring and control integrated circuit.

2. The battery monitoring and control integrated circuit according to claim 1, wherein the DC signal generation circuit is a doubler rectifier circuit.

3. The battery monitoring and control integrated circuit according to claim 2, wherein the doubler rectifier circuit includes a rectifying element built in the battery monitoring and control integrated circuit.

4. The battery monitoring and control integrated circuit according to claim 1, further comprising a second start input terminal for inputting a DC start signal input from the outside, wherein the DC start signal input into the second start input terminal is input into the start detection unit not via the DC signal generation circuit.

5. A battery system comprising:

a plurality of cell groups each having a plurality of series-connected single cells;

a plurality of battery monitoring and control integrated circuits which is respectively connected to the plurality of cell groups and monitors and controls the single cells of the cell groups; and

a battery controller which controls the plurality of battery monitoring and control integrated circuits, wherein

the plurality of battery monitoring and control integrated circuits is connected to each other via capacitors in a predetermined communication order, and

the plurality of battery monitoring and control integrated circuits each include

a first start input terminal for connecting to a DC signal generation circuit which generates a DC signal based on an AC start signal input from the battery controller or a battery monitoring and control integrated circuit at a higher level in the communication order,

a start detection unit which detects the DC signal and activates the battery monitoring and control integrated circuit, and

a start output unit which outputs the AC start signal to a battery monitoring and control integrated circuit at a lower level in the communication order or the battery controller after the activation of the battery monitoring and control integrated circuit.

6. The battery system according to claim 5, wherein the DC signal generation circuit is a doubler rectifier circuit.

7. The battery system according to claim 6, wherein the doubler rectifier circuit includes a rectifying element built in the battery monitoring and control integrated circuit.

8. The battery system according to claim 5, wherein

the plurality of battery monitoring and control integrated circuits each further include a second start input terminal for inputting a DC start signal input from the battery controller, and

the DC start signal input into the second start input terminal is input into the start detection unit not via the DC signal generation circuit.