Storage-battery control system

Patent metadata

Field	Value
Publication number	US-2017229902-A1
Application number	US-201615501976-A
Country	US
Kind code	A1
Filing date	Jan 8, 2016
Priority date	Jan 16, 2015
Publication date	Aug 10, 2017
Grant date	—

Abstract

In a storage-battery control system, an insulating communication unit couples a controller to a battery module constituting a storage battery unit that outputs a predetermined high voltage value. A power supply line is further provided for supplying electric power output from a controller DC/DC, i.e., a controller-side voltage converter for the controller, to the battery module, so that electric power is collectively supplied via the power supply line to a module CPU and a module-side insulating circuit both consuming electric power in the battery module. A secondary battery in the battery module supplies electric power to only a cell-voltage detector.

First claim

1 . A storage-battery control system comprising:
a battery module constituting a storage battery unit configured to output a predetermined high voltage value; a controller; an insulating communication unit configured to couple the battery module and the controller; and a power supply line, wherein the battery module includes a secondary battery for outputting a module voltage value, a module-side voltage converter for converting a voltage value of the secondary battery into a module-side predetermined operation voltage value, and a module-side circuit element that operates at the module-side predetermined operation voltage value, the controller includes a low voltage power supply unit, a controller-side voltage converter for converting a voltage of the low voltage power supply unit into a controller-side predetermined operation voltage value, and a controller-side insulating circuit having a floating reference potential point insulated from a controller reference potential point for the low voltage power supply unit to couple the controller and the insulating communication unit, and the power supply line supplies electric power output from the controller-side voltage converter to the battery module.

2 . The storage-battery control system according to claim 1 , wherein an output side of the module-side voltage converter and an output side of the controller-side voltage converter are coupled to each other via a predetermined backflow preventing device, and the module-side circuit element that operates at the module-side predetermined operation voltage value is supplied with electric power from a coupling point.

3 . The storage-battery control system according to claim 2 , wherein the predetermined backflow preventing device includes a module-side rectifying device having an anode coupled to the output side of the module-side voltage converter and a cathode coupled to the coupling point, and a controller-side rectifying device having an anode coupled to the output side of the controller-side voltage converter and a cathode coupled to the coupling point.

4 . The storage-battery control system according to claim 1 , wherein the storage battery unit includes a plurality of the battery modules coupled to each other in series, and the electric power output from the controller-side voltage converter is supplied to each of the plurality of battery modules.

5 . A storage-battery control system comprising:
a storage battery unit constituted by a plurality of battery modules to output a predetermined high voltage value; a controller; and an insulating communication unit configured to couple the storage battery unit and the controller, wherein each of the plurality of battery modules includes a secondary battery, and a module-side insulating circuit coupling to the insulating communication unit, the controller includes a low voltage power supply unit, a controller-side voltage converter for converting a voltage of the low voltage power supply unit into a controller-side predetermined operation voltage value, and a controller-side insulating circuit coupling to the insulating communication unit, each of the plurality of battery modules includes a power supply path switching circuit for switching between a path for supplying electric power to a predetermined module-side circuit element in the battery module from the secondary battery of the battery module and a path for supplying electric power output from the controller-side voltage converter, and the controller detects a discharge-target battery module based on module voltages of the plurality of battery modules, and, on the discharge-target battery module, urges the power supply path switching circuit to supply electric power from the secondary battery to the predetermined module-side circuit element, while, on each of the plurality of battery modules other than the discharge-target battery module, urges the power supply path switching circuit to supply electric power output from the controller-side voltage converter to the predetermined module-side circuit element.

6 . The storage-battery control system according to claim 5 , wherein the module-side circuit element includes a module-side controlling circuit for controlling each of the plurality of battery modules internally, and the module-side insulating circuit.

7 . The storage-battery control system according to claim 5 , wherein when a voltage difference between a highest module voltage, among the module voltages of the plurality of battery modules, and a target value is equal to or greater than a preset threshold, the controller sets one of the plurality of battery modules which has the highest module voltage to a discharge target.

8 . The storage-battery control system according to claim 7 , wherein a lowest module voltage, among the module voltages of the plurality of battery modules, is set to the target value.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Kamikawa Takahiro
• Kobayashi Masayuki
• Mino Takayuki

Classifications

• H02J7/52

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

• H02J2207/10

  Control circuit supply, e.g. means for supplying power to the control circuit · CPC title

• H02J2207/20

  Charging or discharging characterised by the power electronics converter · CPC title

• H01M10/4257

  Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries · CPC title

• H02J7/00

  Circuit arrangements for charging or discharging batteries or for supplying loads from batteries · CPC title