# US 2014/0191765 A1 · Battery monitoring system and battery monitoring device

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- Number: US 2014/0191765 A1
- Document ID: US20140191765A1
- Status: Published application
- Kind: A1
- Application number: 14/150,301
- Filed: 2014-01-08
- Published: 2014-07-10
- Earliest claimed: 2013-01-10
- Assignees: Lapis Semiconductor Co., Ltd.
- Applicants: LAPIS Semiconductor Co., Ltd.
- Inventors: Koji TAKESHITA
- Web page: https://patentgrep.com/patent/US20140191765A1

## CPC

- H01M 10/4207: {for several batteries or cells simultaneously or sequentially}
- B60L 3/12: Recording operating variables {; Monitoring of operating variables}
- B60L 58/18: of two or more battery modules
- 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 7/50: acting upon multiple batteries simultaneously or sequentially
- H02J 7/80: including monitoring or indicating arrangements
- B60L 2240/547: Voltage
- G01R 31/3835: involving only voltage measurements
- 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
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL 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)
- 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 includes: plural battery monitoring devices that are serially connected to each other; and a control circuit connected to one battery monitoring device and that transmits a first activation signal to the one battery monitoring device, wherein each particular one of the plural battery monitoring devices includes: a constant voltage generation circuit that generates and outputs a constant voltage; a first activation circuit that outputs a second activation signal if the first activation circuit receives the first activation signal; and a second activation circuit that outputs a third activation signal in response to recognizing the constant voltage generated by the constant voltage generation of another of the battery monitoring devices that is connected to the particular battery monitoring device, and wherein the constant voltage generation circuit generates the constant voltage if the constant voltage generation circuit receives the second activation signal or the third activation signal.

## Claims

### Claim 1

A battery monitoring system, comprising:
a plurality of battery monitoring devices that are serially connected to each other, that are each provided for one of a plurality of serially connected battery cell groups, and that monitor a voltage of a plurality of battery cells included in each of the plurality of battery cell groups; and
a control circuit that is connected to one battery monitoring device of the plurality of battery monitoring devices and that transmits a first activation signal to the one battery monitoring device,
wherein each particular one of the plurality of battery monitoring devices comprises:
a constant voltage generation circuit that generates and outputs a constant voltage;
a first activation circuit that outputs a second activation signal if the first activation circuit receives the first activation signal from the control circuit; and
a second activation circuit that outputs a third activation signal in response to recognizing the constant voltage generated by the constant voltage generation of another of the battery monitoring devices that is connected to the particular battery monitoring device, and
wherein the constant voltage generation circuit generates the constant voltage if the constant voltage generation circuit receives the second activation signal or the third activation signal.

### Claim 2 (depends on 1)

The battery monitoring system of claim 1, wherein each of the plurality of battery monitoring devices includes a communication circuit for performing communication with another of the battery monitoring devices that is connected to the particular battery monitoring device, and the communication circuit is driven using the constant voltage generated by the constant voltage generation circuit.

### Claim 3 (depends on 1)

The battery monitoring system of claim 1, wherein the constant voltage generation circuit of each of the plurality of the battery monitoring devices generates the constant voltage based on a voltage provided by a battery cell group which is an object to be monitored by the battery monitoring device in which the constant voltage generation circuit is formed.

### Claim 4 (depends on 1)

The battery monitoring system of claim 1, wherein the second activation circuit outputs the third activation signal if the second activation circuit recognizes that the constant voltage, which is generated by the constant voltage generation circuit of the another battery monitoring device to which the particular battery monitoring device is connected, reaches a predetermined level.

### Claim 5 (depends on 1)

The battery monitoring device of claim 1, wherein the second activation circuit includes a comparison circuit, the comparison circuit outputting a comparison result between a first predetermined voltage level and a voltage level corresponding to the constant voltage, which is generated by the constant voltage generation circuit of the another battery monitoring device to which the particular battery monitoring device is connected, and the second activation circuit outputs the third activation signal if a comparison result is that the voltage level corresponding to the constant voltage exceeds the first predetermined voltage level.

### Claim 6 (depends on 5)

The battery monitoring device of claim 5, wherein the voltage level corresponding to the constant voltage is a voltage level in which a second predetermined voltage level is added to the constant voltage generated by the constant voltage generation circuit of the another battery monitoring device to which the particular battery monitoring device is connected.

### Claim 7

A battery monitoring device that is included in a battery monitoring system, the battery monitoring system including: a plurality of battery monitoring devices that are serially connected to each other, that are each provided for one of a plurality of serially connected battery cell groups, and that monitor a voltage of a plurality of battery cells included in each of the plurality of battery cell groups; and a control circuit that is connected to one battery monitoring device of the plurality of battery monitoring devices and that transmits a first activation signal to the one battery monitoring device, each particular one of the battery monitoring devices included in the battery monitoring system comprising:
a constant voltage generation circuit that generates and outputs a constant voltage;
a first activation circuit that outputs a second activation signal if the first activation circuit receives the first activation signal from the control circuit; and
a second activation circuit that outputs a third activation signal in response to recognizing the constant voltage generated by the constant voltage generation of another of the battery monitoring devices that is connected to the particular battery monitoring device, and
wherein the constant voltage generation circuit generates the constant voltage if the constant voltage generation circuit receives the second activation signal or the third activation signal.