RADIO BATTERY SYSTEM, AND CELL CONTROLLER AND BATTERY CONTROLLER THAT HAVE RADIO BATTERY SYSTEM

• US 20160137091A1
• Filed: 11/11/2015
• Published: 05/19/2016
• Est. Priority Date: 11/13/2014
• Status: Active Grant

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: YAMAZOE, Takanori, SAKABE, Kei
• Granted Patent: US 9,987,945 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 58/10 for monitoring or controlling batteries
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: G01R 31/371 with remote indication, e.g. on external chargers
• CPC Class Codes: G01R 31/396 Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 10/4257 Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
• CPC Class Codes: H01M 2010/4271 Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
• CPC Class Codes: H01M 2010/4278 Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
• CPC Class Codes: H01M 50/204 Racks, modules or packs for multiple batteries or multiple cells
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: H02J 7/005 Detection of state of health [SOH]
• CPC Class Codes: H02J 7/14 for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/92 : Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
• CPC Class Codes: Y02T 90/16 : Information or communication technologies improving the operation of electric vehicles

Abstract

A radio battery system according to the present invention includes a battery controller and a plurality of cell controllers. The battery controller and the plurality of cell controllers communicate at a plurality of communication slots of a time division communication. The battery controller transmits data at a beginning of each of the plurality of communication slots. Each of the cell controllers measures a state of a cell at one or plurality of predetermined communication slots and transmits data at a predetermined communication slot. Each of the cell controllers is capable of switching between a normal transmission/reception mode and a sleep mode with a low power consumption.

Claims

1. A radio battery system comprising:

a battery controller; and

a plurality of cell controllers,

the battery controller and the plurality of cell controllers communicating at a plurality of communication slots of a time division communication, wherein

the battery controller transmits data at a beginning of each of the plurality of communication slots,

each of the cell controllers measures a state of a cell at one or plurality of predetermined communication slots and transmits data at a predetermined communication slot, and

each of the cell controllers is capable of switching between a normal transmission/reception mode and a sleep mode with a low power consumption.

2. The radio battery system according to claim 1, wherein

the battery controller broadcasts a slot number and an identification information of the battery controller as data at the beginning of each of the plurality of communication slots.

3. The radio battery system according to claim 1, wherein

each of the cell controllers enters the transmission/reception mode before a predetermined communication slot occurs, receives the predetermined communication slot, measures the state of the cell, and enters the sleep mode, and

each of the cell controllers enters the transmission/reception mode again before the communication slot set by each of the cell controllers occurs, receives the data of the communication slot transmitted from the battery controller, transmits the state of the cell, and then enters the sleep mode.

6. The radio battery system according to claim 3, wherein

each of the cell controllers includes a first power supply circuit that obtains an operating voltage from a cell to be measured and a second power supply circuit that obtains an operating voltage from a radio power, and

the first power supply circuit operates in the transmission/reception mode and the second power supply circuit operates in the sleep mode.

4. A radio battery system comprising:

a battery controller; and

a plurality of cell controllers,

the battery controller and the plurality of cell controllers communicating at a plurality of communication slots of a time division communication, wherein

the battery controller transmits data at an initial communication slot of the plurality of communication slots,

each of the cell controllers receives the initial communication slot, measures a state of a cell, and transmits data at one or plurality of predetermined communication slots, and

each of the cell controllers is capable of switching between a normal transmission/reception mode and a sleep mode with a low power consumption.

5. The radio battery system corresponding to claim 4, wherein

each of the cell controllers enters the transmission/reception mode before a predetermined communication slot occurs, receives the predetermined communication slot, measures the state of the cell, and enters the sleep mode, and

after a period of time set by each of the cell controllers elapses, the cell controllers enters the transmission/reception mode again, transmits the state of the cell, and then enters the sleep mode.

7. The radio battery system according to claim 5, wherein

each of the cell controllers includes a first power supply circuit that obtains an operating voltage from a cell to be measured and a second power supply circuit that obtains an operating voltage from a radio power, and

the first power supply circuit operates in the transmission/reception mode and the second power supply circuit operates in the sleep mode.

8. A cell controller comprising:

a power supply circuit that obtains an operating voltage from a cell to be measured;

a radio circuit; and

an antenna that inputs and outputs a radio wave,

the cell controller communicating with a battery controller at a plurality of communication slots of a time division communication,

the cell controller measuring a state of the cell at one or a plurality of predetermined communication slots and transmits data at a predetermined communication slot, and

the cell controller being capable of switching between a normal transmission/reception mode and a sleep mode with a low power consumption.

9. The cell controller according to claim 8, further comprising:

a power supply circuit that obtains an operating voltage from a radio power, wherein

the power supply circuit operates in the sleep mode.

10. A battery controller comprising:

a power supply circuit;

a radio circuit; and

an antenna that inputs and outputs a radio wave,

the battery controller communicating with a cell controller at a plurality of communication slots of a time division communication, and

the battery controller broadcasting a slot number and identification information of the battery controller as data at a beginning of each of the plurality of communication slots.