Battery storage system

• US 8,486,548 B2
• Filed: 11/25/2009
• Issued: 07/16/2013
• Est. Priority Date: 11/28/2008
• Status: Expired due to Fees

• Current Assignee: Hitachi Automotive Systems Limited (Hitachi, Ltd.)
• Original Assignee: Hitachi, Ltd., Hitachi Vehicle Energy, Ltd.
• Inventors: Ueda, Masahiro, Aoshima, Yoshinori
• Primary Examiner(s): Gilliam, Barbara
• Assistant Examiner(s): Arciero, Adam A
• Application Number:
  US12/626,206
• Publication Number:
  US 20100136390A1
• Time in Patent Office: 1,329 Days
• Field of Search: None
• US Class Current: 429/61
• CPC Class Codes: G01R 35/00 Testing or calibrating of apparatus covered by the other groups of this subclass
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/441 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/482 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A battery storage system includes: a plurality of battery modules that are electrically connected in series and in parallel, each comprising a plurality of battery cells; a plurality of sensors provided to each of the plurality of battery modules, that output at least signals corresponding to voltage and current of the each of the battery modules; a plurality of first control devices each of which is provided to the each of the plurality of battery modules, and obtains a power that can be inputted and outputted to and from the each of the battery modules based upon the voltage and current obtained from the output signals of the sensors of the each of the battery modules; and a second control device that performs overall control of the plurality of first control devices, and if a fault of a sensor in any one of the plurality of battery modules has occurred, the second control device obtains a total power that can be inputted and outputted to and from the all of the battery modules, based upon powers each of which can be inputted and outputted to and from each of other battery modules than a battery module in which the sensor has detected the fault, and outputs information of the total power.

Claims

1. A battery storage system, comprising:

a plurality of battery modules that are electrically connected in series and in parallel, each comprising a plurality of battery cells;

a plurality of sensors provided to each of the plurality of battery modules, that output at least signals corresponding to voltage and current of the each of the battery modules;

a plurality of first control devices each of which is provided to the each of the plurality of battery modules, and obtains a power that can be inputted and outputted to and from the each of the battery modules based upon the voltage and current obtained from the output signals of the sensors of the each of the battery modules; and

a second control device that is separate from the first control devices and performs overall control of the plurality of first control devices, wherein

the second control device is arranged independently of the battery modules and provided for all of the battery modules, and

the second control device is programmed to calculate, when a fault of a sensor in any one of the plurality of battery modules has occurred, a total power that can be inputted and outputted to and from the all of the battery modules, based upon powers each of which can be inputted and outputted to and from each of other battery modules than a battery module in which the sensor has detected the fault, and outputs information of the total power.

2. A battery storage system according to claim 1, wherein the second control device reduces the total power according to a degree of fault of the sensor.

3. A battery storage system according to claim 2, wherein the second control device reduces the total power according to a number of sensors that have been determined as being faulty.

4. A battery storage system according to claim 2, wherein the second control device reduces the total power according to a type of the sensor that has been determined as being faulty.

5. A battery storage system according to claim 1, further comprising:

sensors that detect voltage and current of all of the battery modules.

6. A battery storage system according to claim 1, wherein the second control device includes a leakage detector.

7. A battery storage system according to claim 1, further comprising:

a positive side main contactor and a negative side main contactor for controlling electrical connection between the battery modules and positive and negative terminals on a chassis of the battery storage system.