Regulating device, battery assembly device and regulating method

Patent metadata

Field	Value
Publication number	US-9472960-B2
Application number	US-201314386846-A
Country	US
Kind code	B2
Filing date	Feb 13, 2013
Priority date	Mar 22, 2012
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

A regulating device includes: a generating means for generating an output voltage from an input voltage; a plurality of first switches, respectively corresponding to the plural storage battery units connected in parallel, with each of said first switches interposed between the corresponding storage battery unit and the input side of the generating means; a plurality of second switches, respectively corresponding to the plural storage battery units, with each of said second switches interposed between the corresponding storage battery unit and the output side of the generating means; a detecting means for detecting the voltage of each of the plural storage battery units; and, a control means that, referring to the result of detection from the detecting means, identifies first storage battery units whose voltages are higher than the average value of voltage of the plural storage battery units and second storage battery units whose voltages are lower than the average value, from the plural storage battery units, and turns on the first control switches corresponding to the first storage battery units from among the plural first switches and the second control switches corresponding to the second storage battery units from among the second switches.

First claim

The invention claimed is:

1. A regulating device for regulating voltage difference between plural storage battery units connected in parallel, comprising:
a generating unit for generating an output voltage from an input voltage;
a plurality of first switches, corresponding to the plural storage battery units, respectively, with each of said first switches interposed between the corresponding storage battery unit and the input side of the generating unit;
a plurality of second switches, corresponding to the plural storage battery units respectively, with each of said second switches interposed between the corresponding storage battery unit and the output side of the generating unit;
a detecting unit for detecting the voltage of each of the plural storage battery units; and,
a control unit that, referring to the result of detection from the detecting unit, identifies first storage battery units whose voltages are higher than the average value of voltage of the plural storage battery units and second storage battery units whose voltages are lower than the average value of the plural storage battery units, and turns on the first control switches corresponding to the first storage battery units from among the plural first switches and the second control switches corresponding to the second storage battery units from among the second switches.

2. The regulating device according to claim 1 , wherein
the control unit identifies one unit from among the storage battery units whose voltages are higher than the average value from among the plural storage battery units as the first battery unit and identifies one unit from among storage battery units whose voltages are lower than the average value among the plural storage battery units as the second battery unit.

3. The regulating device according to claim 1 , wherein the generating unit is a DCDC converter.

4. The regulating device according to claim 1 , wherein the control unit turns off, at least, one of the first control switch and the second control switch when the difference in voltage between the first storage battery unit and the second storage battery unit becomes equal to or lower than a predetermined value.

5. A battery assembly device comprising a plurality of storage battery units connected in parallel and a regulating device according to claim 1 .

6. A regulating method performed by a regulating device that includes a generating unit for generating an output voltage from an input voltage to regulate voltage difference between plural storage battery units connected in parallel, comprising the steps of:
detecting the voltage of each of the plural storage battery units;
identifying, by referring to the result of the voltage detection, first storage battery units whose voltages are higher than the average value of voltage of the plural storage battery units and second storage battery units whose voltages are lower than the average value of the plural storage battery units; and,
turning on the first control switches corresponding to the first storage battery units from among the plural first switches that correspond to the plural storage battery units, respectively, with each of said first switches interposed between the corresponding storage battery unit and the input side of the generating unit, and turning on the second control switches corresponding to the second storage battery units from among the second switches that correspond to the plural storage battery units respectively, with each of said second switches interposed between the corresponding storage battery unit and the output side of the generating unit.

Assignees

• Nec Corp

Inventors

• Nomura Yojiro

Classifications

• H02J7/82

  Control of state of charge [SOC] · CPC title

• H02J7/52

  for charge balancing, e.g. equalisation of charge between batteries · CPC title

• H02J7/50

  acting upon multiple batteries simultaneously or sequentially · CPC title

• H02J7/485 Primary

  with provisions for charging different types of batteries · CPC title

• H02J7/007

  Electricity · mapped topic