# US 12,119,683 B2 · Battery management device and battery device

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- Number: US 12,119,683 B2
- Document ID: US12119683B2
- Status: Granted
- Kind: B2
- Application number: 17/502,315
- Filed: 2021-10-15
- Published: 2022-04-28
- Granted: 2024-10-15
- Earliest claimed: 2020-10-23
- Assignees: Denso Corporation
- Applicants: Denso Corporation
- Inventors: Shogo Shigemori; Shunichi Kubo; Takeshi Iida; Yukihiro Tomonaga; Taisuke Kurachi; Shozo Suzuki; Shinya Kato
- Web page: https://patentgrep.com/patent/US12119683B2

## CPC

- H02J 7/52: for charge balancing, e.g. equalisation of charge between batteries
- B60L 58/10: for monitoring or controlling batteries
- B60L 58/12: responding to state of charge [SoC]
- B60L 58/22: Balancing the charge of battery modules
- G01R 31/382: Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R 31/3842: combining voltage and current measurements
- 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 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)}
- H01M 10/48: 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)
- H01M 10/482: {for several batteries or cells simultaneously or sequentially}
- H02J 7/875: {Charging or discharging for charge maintenance, battery initiation or rejuvenation}
- H01M 2010/4271: {Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing}
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- H02J 7/56: Active balancing, e.g. using capacitor-based, inductor-based or DC-DC converters
- Y02E 60/10: Energy storage using batteries
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
- 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 management device is configured to set a limited measurement range that limits a range for measuring a voltage of each of a plurality of batteries for a vehicle. The battery management device is configured to measure the voltage of each of the plurality of batteries within the limited measurement range.

## Claims

### Claim 1

A battery management device comprising:
a range setting unit configured to set a limited measurement range that limits a range for measuring a voltage of each of a plurality of batteries for a vehicle, and
a measuring unit configured to measure the voltage of each of the plurality of batteries within the limited measurement range,
wherein
the range setting unit sets the limited measurement range adjusted based on a voltage value of each of the plurality of batteries when the voltage value of each of the plurality of batteries is to be estimated, and
the range setting unit sets the limited measurement range based on a measurement value for the voltage of each of the plurality of batteries within an entire range when the voltage value of each of the plurality of batteries is not to be estimated.

### Claim 2 (depends on 1)

The battery management device according to claim 1, wherein
the range setting unit sets the limited measurement range by using at least one of a maximum value and a minimum value of the measurement value for the voltage of each of the plurality of batteries measured within the entire range.

### Claim 3

A battery management device comprising:
a range setting unit configured to set a limited measurement range that limits a range for measuring a voltage of each of a plurality of batteries for a vehicle, and
a measuring unit configured to measure the voltage of each of the plurality of batteries within the limited measurement range,
wherein
the range setting unit sets the limited measurement range and the measuring unit measures the voltage within the limited measurement range when a noise level is acceptable in a situation where a noise is acceptable, and
the range setting unit sets the limited measurement range and the measuring unit measures the voltage within the limited measurement range when a power device that provides a driving force of the vehicle is stopped and charging or discharging of each of the plurality of batteries is stopped.

### Claim 4

A battery management device comprising:
a range setting unit configured to set a limited measurement range that limits a range for measuring a voltage of each of a plurality of batteries for a vehicle, and
a measuring unit configured to measure the voltage of each of the plurality of batteries within the limited measurement range,
further comprising
an equalization determination unit configured to determine whether or not to perform an equalization process for reducing a voltage variation for a predetermined battery group including at least a part of the plurality of batteries, wherein
the equalization determination unit determines whether or not to perform the equalization process based on a measurement value for the voltage of each of the plurality of batteries measured within the limited measurement range.

### Claim 5 (depends on 4)

The battery management device according to claim 4, wherein
when the equalization process is performed on batteries included in the predetermined battery group, the equalization determination unit selects a part of the batteries included in the predetermined battery group as a target for which a voltage is to be measured.

### Claim 6

A battery management device comprising:
a range setting unit configured to set a limited measurement range that limits a range for measuring a voltage of each of a plurality of batteries for a vehicle, and
a measuring unit configured to measure the voltage of each of the plurality of batteries within the limited measurement range,
further comprising
an equalization determination unit configured to determine whether or not to perform an equalization process for reducing voltage variation for a predetermined battery group including at least a part of the plurality of batteries, wherein
the equalization determination unit sets a determination threshold value according to a width of the limited measurement range,
when a difference between a maximum voltage measurement value and a minimum voltage measurement value each measured for the predetermined battery group is smaller than the determination threshold value, the equalization determination unit determines not to perform the equalization process, and
when the difference is greater than the determination threshold value, the equalization determination unit determines to perform the equalization process.

### Claim 7 (depends on 6)

The battery management device according to claim 6, wherein
when the width of the limited measurement range is greater than a predetermined range width, the equalization determination unit corrects the determination threshold value to be greater, and
when the width of the limited measurement range is smaller than the predetermined range width, the equalization determination unit corrects the determination threshold value to be smaller.

### Claim 8

A battery management device comprising:
a range setting unit configured to set a limited measurement range that limits a range for measuring a voltage of each of a plurality of batteries for a vehicle, and
a measuring unit configured to measure the voltage of each of the plurality of batteries within the limited measurement range,
wherein
when the battery management device is switched from a non-driving state to a driving state, the range setting unit sets the range for measuring the voltage to a usable range of each of the plurality of batteries.

### Claim 9

A battery device comprising:
a plurality of batteries for a vehicle;
a range setting unit configured to set a limited measurement range that limits a range for measuring a voltage of each of the plurality of batteries; and
a measuring unit configured to measure the voltage of each of the plurality of batteries within the limited measurement range,
wherein
the range setting unit sets the limited measurement range adjusted based on a voltage value of each of the plurality of batteries when the voltage value of each of the plurality of batteries is to be estimated, and
the range setting unit sets the limited measurement range based on a measurement value for the voltage of each of the plurality of batteries within an entire range when the voltage value of each of the plurality of batteries is not to be estimated.