# US 11,309,718 B2 · Battery monitoring system and battery monitoring apparatus

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,309,718 B2
- Document ID: US11309718B2
- Status: Granted
- Kind: B2
- Application number: 15/914,442
- Filed: 2018-03-07
- Published: 2018-09-27
- Granted: 2022-04-19
- Earliest claimed: 2017-03-27
- Assignees: DENSO TEN Limited; Automotive Energy Supply Corporation
- Applicants: Envision AESC Japan Ltd.
- Inventors: Naoya Kurahashi; Kazuomi Hayashi
- Web page: https://patentgrep.com/patent/US11309718B2

## CPC

- B60L 58/21: having the same nominal voltage
- B60L 3/0046: {relating to electric energy storage systems, e.g. batteries or capacitors}
- B60L 3/04: Cutting off the power supply under fault conditions (protective devices and circuit arrangements in general H01H; H02H)
- B60L 50/60: using power supplied by batteries (in combination with fuel cells B60L50/75)
- B60L 58/12: responding to state of charge [SoC]
- G01R 31/3278: {of relays, solenoids or reed switches (measuring contact resistance G01R27/205; high voltage magnetic switches G01R31/3271, G01R31/333; testing electric windings G01R31/72; monitoring of fail safe circuits H01H47/002)}
- G01R 31/392: Determining battery ageing or deterioration, e.g. state of health
- G01R 31/396: Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
- H01M 10/482: {for several batteries or cells simultaneously or sequentially}
- H02J 7/00: Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J 7/50: acting upon multiple batteries simultaneously or sequentially
- H02J 7/82: Control of state of charge [SOC]
- H02J 7/84: Control of state of health [SOH]
- B60L 2260/44: by parameter estimation
- H01M 50/20: Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders (structural combination of accumulators with charging apparatus H01M10/46)
- H02J 2105/37: exchanging power with electric vehicles [EV] or with hybrid electric vehicles [HEV]
- Y02E 60/10: Energy storage using batteries
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y02T 90/16: Information or communication technologies improving the operation of electric vehicles
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A battery monitoring system according to an embodiment includes a plurality of battery monitoring apparatuses provided in accordance with battery packs. Each of the battery monitoring apparatuses includes a setting unit and a communication unit. The setting unit sets a communication system to at least one of a first communication system and a second communication system having a shorter communication period than that of the first communication system, sets the communication system to the second communication system during a failure diagnosis to be performed in a start-up of the corresponding battery monitoring apparatus, and sets the communication system to the first communication system after the failure diagnosis. The communication unit communicates with another battery monitoring apparatus of the plurality of battery monitoring apparatuses by using the communication system set by the setting unit.

## Claims

### Claim 1

A battery monitoring system comprising:
a plurality of battery monitoring apparatuses respectively associated with battery packs, each of the battery monitoring apparatuses including:
a setting unit that:
sets a communication system to at least one of:
a first communication system establishing communication between the plurality of battery monitoring apparatuses regularly every time a first communication period elapses; and
a second communication system establishing communication between the plurality of battery monitoring apparatuses regularly every time a second communication period elapses, the second communication period being shorter than the first communication period;
during a failure diagnosis to be performed in a start-up of the corresponding battery monitoring apparatus:
sets the communication system to the second communication system initially; and
when communication using the second communication system fails, sets the communication system to the first communication system; and
after the failure diagnosis, sets the communication system to the first communication system; and
a communication unit that:
communicates with another battery monitoring apparatus of the plurality of battery monitoring apparatuses by using the communication system set by the setting unit; and
during the failure diagnosis, communicates with the other battery monitoring apparatus by using the first communication system when communication using the second communication system fails,
wherein the communication units of the plurality of battery monitoring apparatuses collectively communicate an event result in the first communication system, and collectively communicate an event result each time an event is terminated in the second communication system.

### Claim 2 (depends on 1)

The battery monitoring system according to claim 1,
wherein the plurality of battery monitoring apparatuses performs communication between two battery monitoring apparatuses of the plurality of battery monitoring apparatuses, and
one battery monitoring apparatus of the two battery monitoring apparatuses is a master battery monitoring apparatus, and another battery monitoring apparatus is a slave battery monitoring apparatus.

### Claim 3 (depends on 1)

The battery monitoring system according to claim 1, wherein the communication unit starts a next communication without waiting for communication using the first communication system when the communication using the second communication system succeeds during the failure diagnosis.

### Claim 4

A battery monitoring apparatus comprising:
a setting unit that:
sets a communication system to at least one of:
a first communication system establishing communication between the plurality of battery monitoring apparatuses regularly every time a first communication period elapses; and
a second communication system establishing communication between the plurality of battery monitoring apparatuses regularly every time a second communication period elapses, the second communication period being shorter than the first communication period;
during a failure diagnosis to be performed at a start of charge or discharge by one or more battery packs:
sets the communication system to the second communication system initially; and
when communication using the second communication system fails, sets the communication system to the first communication system; and
after the failure diagnosis, sets the communication system to the first communication system; and
a communication unit that:
performs communication by using the communication system set by the setting unit;
communicates an event result in the first communication system;
communicates an event result each time an event is terminated in the second communication system; and
during the failure diagnosis, communicates using the first communication system when communication using the second communication system fails.