Battery monitoring device

Patent metadata

Field	Value
Publication number	US-9739838-B2
Application number	US-201415127255-A
Country	US
Kind code	B2
Filing date	Dec 3, 2014
Priority date	Mar 25, 2014
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

Each of a plurality of monitoring units, when identification information is not set for it, transmits, to a subsequent monitoring unit or a control unit, a fixed unset signal that indicates that identification information has not been set for it, regardless of signal transmitted from the previous monitoring unit or the control unit, and the control unit, upon receiving the unset signal transmitted from a last monitoring unit, shifts to an identification information setting process.

First claim

What is claimed is:

1. A battery monitoring device comprising:
a plurality of monitoring units that monitor a state of a battery; and
a control unit that is connected to the plurality of monitoring units in series and that communicates with the plurality of monitoring units by using identification information set for the plurality of monitoring units, wherein
each of the plurality of monitoring units, when identification information is not set therefor, transmits, to the subsequent monitoring unit or the control unit, a fixed unset signal that indicates that identification information has not been set therefor, regardless of signal transmitted from the previous monitoring unit or the control unit, and
upon receiving the unset signal transmitted from the last monitoring unit, the control unit shifts to at least one of an identification information setting process and a communication abnormality detection process.

2. The battery monitoring device according to claim 1 , wherein
after shifting to the identification information setting process,
the control unit transmits a setting signal to the first monitoring unit, and
each of the plurality of monitoring units assigns, as identification information thereof, a piece of identification information corresponding to the setting signal transmitted from the previous monitoring unit or the control unit, and changes the setting signal so as to transmit the setting signal to the subsequent monitoring unit or the control unit.

3. The battery monitoring device according to claim 2 , wherein
in a case where it is not possible to receive the setting signal, each of the plurality of monitoring units transmits an abnormal signal to the subsequent monitoring unit or the control unit, and when receiving the abnormal signal from the previous monitoring unit, each of the plurality of monitoring units changes the abnormal signal so as to transmit the abnormal signal to the subsequent monitoring unit or the control unit, and
the control unit identifies an occurrence location of a communication abnormality in accordance with the abnormal signal transmitted from the last monitoring unit.

4. The battery monitoring device according to claim 1 , wherein
after shifting to the communication abnormality detection process,
the control unit transmits a detection signal to the first monitoring unit,
upon receiving the detection signal transmitted from the previous monitoring unit or the control unit, each of the plurality of monitoring units transmits the detection signal to the subsequent monitoring unit or the control unit, and in a case where it is not possible to receive the detection signal, each of the plurality of monitoring units transmits an abnormal signal to the subsequent monitoring unit or the control unit, and upon receiving the abnormal signal transmitted from the previous monitoring unit, each of the plurality of monitoring units changes the abnormal signal so as to transmit the abnormal signal to the subsequent monitoring unit or the control unit, and

the control unit identifies an occurrence location of a communication abnormality in accordance with the abnormal signal transmitted from the last monitoring unit.

5. The battery monitoring device according to claim 1 , wherein
the unset signal is a signal of a fixed DUTY ratio, a frequency, or the number of pulses per unit time.

6. The battery monitoring device according to claim 2 , wherein
each of the plurality of monitoring units changes DUTY ratio, frequency, or the number of pulses per unit time of the setting signal so as to transmit the setting signal to the subsequent monitoring unit or the control unit.

7. The battery monitoring device according to claim 3 , wherein
each of the plurality of monitoring units changes DUTY ratio, frequency, or the number of pulses per unit time of the abnormal signal so as to transmit the abnormal signal to the subsequent monitoring unit or the control unit.

8. The battery monitoring device according to claim 4 , wherein
each of the plurality of monitoring units changes DUTY ratio, frequency, or the number of pulses per unit time of the abnormal signal so as to transmit the abnormal signal to the subsequent monitoring unit or the control unit.

Assignees

• Toyota Jidoshokki Kk

Inventors

• Hase Ryusuke
• Tsuzuku Takahiro

Classifications

• H01M10/486

  for measuring temperature · CPC title

• H01M10/488

  Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density · CPC title

• H01M10/48

  Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) · CPC title

• G01R31/3689 Primary

  Physics · mapped topic

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title