Multi-Series Battery Control System

• US 20090130541A1
• Filed: 08/19/2008
• Published: 05/21/2009
• Est. Priority Date: 09/28/2007
• Status: Active Grant

• Current Assignee: Hitachi Automotive Systems Limited (Hitachi, Ltd.)
• Original Assignee: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
• Inventors: Emori, Akihiko, Kikuchi, Mutsumi, Kudo, Akihiko, Kawahara, Youhei, Yamauchi, Tatsumi, Sakabe, Kei
• Granted Patent: US 8,426,047 B2
• Time in Patent Office: Days
• US Class Current: 429/61
• CPC Class Codes: H02J 7/0019 using switched or multiplexed charge circuits
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A multi-series battery control system comprises battery cell groups each having a plurality of serially connected battery cells, a plurality of integrated circuits each disposed in correspondence to one of the battery cell groups and a battery control device that exchanges signals with the individual integrated circuits. Each integrated circuit includes an address setting means that receives a message unique to the integrated circuit, different from messages sent to other integrated circuits, from the battery control device, writes over an initialized address of the integrated circuit with the message and alters the message to a message with which an initialized address of another integrated circuit cannot be overwritten in a step assigned with an ordinal number matching the position of the integrated circuit with regard to the connection order.

Claims

1. A multi-series battery control system, comprising:

battery cell groups each having a plurality of serially connected battery cells;

a plurality of integrated circuits each disposed in correspondence to one of the battery cell groups; and

a battery control device that exchanges signals with the integrated circuits, wherein;

the integrated circuits are sequentially connected with a transmission path, a signal from the battery control device received at an integrated circuit assuming a first position with regard to a connection order is then repeatedly input and output in sequence from the integrated circuit assuming the first position to an integrated circuit assuming the last position with regard to the connection order and the signal output from the integrated circuit at the last position is transmitted to the battery control device; and

each integrated circuit includes an address setting means that receives a message unique to the integrated circuit different from messages sent to other integrated circuits, from the battery control device, writes over an initialized address of the integrated circuit with the message and alters the message to a message with which an initialized address of another integrated circuit cannot be overwritten in a step assigned with an ordinal number matching the position of the integrated circuit with regard to the connection order; and

addresses of the integrated circuits are individually set in sequence as operation in the step is executed sequentially at each of the integrated circuits.

2. A multi-series battery control system according to claim 1, wherein:

the integrated circuits each include an address initializing circuit (a startup circuit 254).

3. A multi-series battery control system according to claim 1, wherein:

in the step assigned with an ordinal number K, a message to be used to overwrite the initialized address to K is transmitted from the battery control device to the integrated circuit assuming the first position; and

the address setting means in an integrated circuit at a position matching the ordinal number K with regard to the connection order overwrites the initialized address of the integrated circuit with K and transmits a message to be used to overwrite an address other than the initialized address with K to each of succeeding integrated circuits with regard to the connection order.

4. A multi-series battery control system according to claim 1, wherein:

reception of the signal from the battery control device at the integrated circuit at the first position and transmission of the signal from the integrated circuit at the last position to the battery control device are electrically insulated from each other.

5. A multi-series battery control system according to claim 1, wherein:

the integrated circuits each detect voltages at the battery cells constituting the battery cell group corresponding to the integrated circuit and control power supplied from the battery cell group.

6. A multi-series battery control system, comprising:

battery cell groups defined in units each having a plurality of serially connected battery cells;

integrated circuits each disposed in correspondence to one of the battery cell groups to control the corresponding battery cell group; and

a battery control device that exchanges signals with the integrated circuits, wherein;

the integrated circuits are connected sequentially, a signal from the battery control device input to an integrated circuit assuming a first position with regard to a connection order is then repeatedly input and output in sequence from the integrated circuit assuming the first position to an integrated circuit assuming the last position with regard to the connection order and the signal output from the integrated circuit at the last position is transmitted to the battery control device,

each integrated circuit includes an address setting means that sets an address of the integrated circuit based upon an address setting message input thereto and outputs in an address setting message to be used to set an address assuming a value greater than the address by one and

after an address setting message to be used to set an address assuming a predetermined value is input from the battery control device to the integrated circuit at the first position, addresses of the integrated circuits are individually set in sequence.