US 10,538,171 B2Granted

Power supply control system and power supply control method

AssigneeToyota Jidosha Kabushiki Kaisha

InventorLinyu Sun

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Abstract

A power supply control system includes at least two power supply devices. Each of the at least two power supply devices includes a battery, a monitoring unit configured to generate availability information of the battery, and a charging and discharging controller configured to control charging and discharging of the battery. A first monitoring unit of a first power supply device acquires a state of a second battery of a second power supply device from a second monitoring unit of the second power supply device. When a failure occurs in the second monitoring unit, the first monitoring unit estimates a present state of the second battery, and generates estimation availability information of the second battery based on an estimation result. A second charging and discharging controller of the second power supply device acquires the estimation availability information, and controls charging and discharging of the second battery.

Claims8

Dependent claims

A power supply control system comprising at least two power supply devices, wherein:

each of the at least two power supply devices includes
a battery,
a monitoring unit configured to detect a state of the battery and to generate availability information including information indicating an availability of the battery based on a detection result, and
a charging and discharging controller configured to acquire the availability information from the monitoring unit and to control charging and discharging of the battery based on the availability information;
the at least two power supply devices include a first power supply device and a second power supply device,
the first power supply device includes a first battery, a first monitoring unit and a first charging and discharging controller, and
the second power supply device includes a second battery, a second monitoring unit and a second charging and discharging controller;
the first monitoring unit is configured to acquire and store a state of the second battery from the second monitoring unit;
the first monitoring unit is configured to, when the first monitoring unit operates normally and a failure occurs in the second monitoring unit,
estimate a present state of the second battery based on the detected state of the first battery and the stored state of the second battery, and
generate estimation availability information including information indicating an availability of the second battery based on an estimation result;
and
the second charging and discharging controller is configured to, when the first monitoring unit operates normally and the failure occurs in the second monitoring unit,
acquire the estimation availability information from the first monitoring unit, and
control charging and discharging of the second battery based on the acquired estimation availability information.

12 more elements

A power supply control method executed by a power supply control system including at least two power supply devices, each of the at least two power supply devices including a battery, a monitoring unit, and a charging and discharging controller, the at least two power supply devices include a first power supply device and a second power supply device, the first power supply device includes a first battery, a first monitoring unit and a first charging and discharging controller, and the second power supply device includes a second battery, a second monitoring unit and a second charging and discharging controller, the power supply control method comprising:

detecting a state of the battery of the power supply device and generating availability information including information indicating an availability of the battery of the power supply device based on a detection result, by a computer of the monitoring unit in each of the power supply devices;
acquiring the availability information from the monitoring unit of the power supply device and controlling charging and discharging of the battery of the power supply device based on the availability information, by a computer of the charging and discharging controller;
acquiring and storing a state of the second battery from the second monitoring unit, by a computer of the first monitoring unit;
when the first monitoring unit operates normally and a failure occurs in the second monitoring unit, estimating a present state of the second battery based on the detected state of the first battery and the stored state of the second battery and generating estimation availability information including information indicating an availability of the second battery based on an estimation result, by the computer of the first monitoring unit;
and
acquiring the estimation availability information from the first monitoring unit and controlling charging and discharging of the second battery based on the acquired estimation availability information, by a computer of the second charging and discharging controller.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/136,820Filed 20 Sep 2018
Priority: JP 2017-22076316 Nov 2017
Published: US 2019/0143838 A116 May 2019
Granted: 21 Jan 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification21 codes

H01M 10/425
Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells: structural combination with electronic…
B60L 50/66
Using power supplied by batteries: arrangements of batteries
B60L 58/12
For monitoring or controlling batteries: responding to state of charge [SoC]
B60L 58/22
Of two or more battery modules: balancing the charge of battery modules