US 11,906,588 B2Granted

Battery monitoring apparatus

AssigneeDenso Corporation

InventorsAkihiko Ito, Tatsuhiro Numata

Life of this patent

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Abstract

A battery monitoring apparatus includes a battery ECU, satellite devices each of which measures the voltage at a battery cell in response to a command signal from the battery ECU, and a wireless module which achieves a wireless communication between the battery ECU and each of the satellite devices after a wireless connection between the battery ECU and each of the satellite devices is completed. When receiving a start signal outputted before a start switch for a drive power source of the vehicle is turned on, the wireless module is activated to start the wireless connection between the battery ECU and each of the satellite devices. This establishes and completes the wireless connections faster than when the wireless module is activated simultaneously with turning on of the start switch for the drive power source. This achieves quick monitoring of the state of the battery cells.

Claims9

Dependent claims

A battery monitoring apparatus which monitors states of battery cells installed in a vehicle comprising:

a battery electronic control unit;
satellite devices each of which measures a voltage at a battery cell in response to a command outputted from the battery electronic control unit;
and
a single wireless module configured to implement wireless communication between the battery electronic control unit and each of the satellite devices after a wireless connection between the battery electronic control unit and each of the satellite devices is completed, wherein
the wireless module includes a plurality of master units installed in the battery electronic control unit and a plurality of slave units installed in the satellite devices,
the battery electronic control unit includes a microcomputer configured to output the commands for the satellite devices to the master units, and
the master units are connected parallel to each other directly with the microcomputer, each of the master units implementing the wireless communication with a corresponding one(s) of the slave units.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/720,768Filed 14 Apr 2022 · continuation
Priority: JP 2018-2083415 Nov 2018
Published: US 2022/0236330 A128 Jul 2022
Granted: 20 Feb 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

G01R 31/371
Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of…
B60L 58/12
For monitoring or controlling batteries: responding to state of charge [SoC]
B60L 58/18
For monitoring or controlling batteries: of two or more battery modules
G01R 31/3835
Arrangements for monitoring battery or accumulator variables, e.g. SoC: involving only voltage measurements

Family

Application16/674,074Parent of this continuation · filed 5 Nov 2019
US 2022/0236330 A1Pre-grant publication · published 28 Jul 2022
US 11,333,709 B2Parent of this continuation
US 2020/0142004 A1Published application
US 11,906,588 B2This patent

From the US filing history. Foreign family members aren’t listed.

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