# US 12,007,450 B2 · Integrated monitoring capacity of a power bank battery and devices charged therewith

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- Number: US 12,007,450 B2
- Document ID: US12007450B2
- Status: Granted
- Kind: B2
- Application number: 18/113,909
- Filed: 2023-02-24
- Published: 2023-07-13
- Granted: 2024-06-11
- Earliest claimed: 2021-03-11
- Assignees: Duracell U.S. Operations, Inc.
- Applicants: Duracell U.S. Operations, Inc.
- Inventors: Jordan Todorov Bourilkov; Sergio Coronado Hortal; Francisco Jose Restrepo; John Rotondo
- Web page: https://patentgrep.com/patent/US12007450B2

## CPC

- G01R 31/392: Determining battery ageing or deterioration, e.g. state of health
- H02J 7/685: {using connection detecting circuits (H02J7/68 takes precedence)}
- G01R 31/367: Software therefor, e.g. for battery testing using modelling or look-up tables
- G01R 31/371: with remote indication, e.g. on external chargers
- H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)}
- H01M 10/4257: {Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries}
- H01M 10/441: {for several batteries or cells simultaneously or sequentially}
- H01M 10/482: {for several batteries or cells simultaneously or sequentially}
- H01M 10/486: {for measuring temperature}
- H02J 7/342: {The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging (with circuits for polarity protection H02J7/68)}
- H02J 7/82: Control of state of charge [SOC]
- H02J 7/84: Control of state of health [SOH]
- H01M 2010/4278: {Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller}
- 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
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

## Abstract

A portable power bank including a rechargeable battery and/or a remote server may detect loss of capacity in the power bank battery. The power bank and/or remote server determines a nominal capacity of the power bank, and an actual capacity of the power bank, the actual capacity being less than the nominal capacity. The power bank and/or remote server compares the actual capacity to the nominal capacity to determine a health value of the power bank battery. When the power bank battery health value is at or below a threshold value, the power bank and/or remote server transmits an indication of the health value.

## Claims

### Claim 1

A power bank device, comprising:
a battery for supplying electric charge to a battery of a rechargeable device external to the power bank device, via an electrical connection between the power bank battery and a rechargeable device battery, the power bank battery having a nominal capacity;
one or more transceivers configured to exchange communication signals with the rechargeable device and a remote server; and
one or more processors; and
a non-transitory memory storing computer executable instructions that, when executed via the one or more processors, cause the power bank device to:
determine the nominal capacity of the power bank battery,
measure a present capacity of the power bank battery,
compare the present capacity of the power bank battery to the nominal capacity of the power bank battery to determine a health value of the power bank battery, and
transmit to a remote server, via the one or more transceivers, an indication of the health value of the power bank battery when the health value is less than or equal to a threshold value.

### Claim 2 (depends on 1)

The power bank device of claim 1, wherein to determine the present capacity of the power bank battery, the instructions, when executed, cause the power bank device to:
monitor an inflowing electric current to the power bank battery during a time interval corresponding to a charging of the power bank battery; and
calculate an input charge capacity of the power bank battery based upon the monitored inflowing electric current over the time interval; and
determine the present capacity based upon the calculated input charge capacity.

### Claim 3 (depends on 1)

The power bank device of claim 1, wherein to determine the present capacity of the power bank battery, the instructions, when executed, cause the power bank device to:
monitor an outflowing electric current from the power bank battery during a time interval corresponding to a supply of electric charge from the power bank battery to the rechargeable device;
calculate an output charge capacity of the power bank battery based upon the monitored outflowing electric current over the time interval; and
determine the present capacity based upon the calculated output charge capacity.

### Claim 4 (depends on 1)

The power bank device of claim 1, wherein to determine the present capacity of the power bank battery, the instructions, when executed, cause the power bank device to:
monitor an inflowing electric current to the power bank battery and a voltage of the power bank battery during a time interval corresponding to a charging of the power bank battery; and
calculate an input energy capacity of the power bank battery based upon the monitored inflowing electric current and the voltage over the time interval; and
determine the present capacity based upon the calculated input energy capacity.

### Claim 5 (depends on 1)

The power bank device of claim 1, wherein to determine the present capacity of the power bank battery, the instructions, when executed, cause the power bank device to:
monitor an outflowing electric current from the power bank battery and a voltage of the power bank battery during a time interval corresponding to a supply of electric charge from the power bank battery to the rechargeable device;
calculate an output energy capacity of the power bank battery based upon the monitored outflowing electric current and the voltage over the time interval; and
determine the present capacity based upon the calculated output energy capacity.

### Claim 6 (depends on 1)

The power bank of claim 1, wherein to transmit the health value to the remote server, the instructions, when executed, cause the power bank device to:
transmit, via a wireless connection between the one or more transceivers and the remote server, the health value.

### Claim 7 (depends on 1)

The power bank of claim 1, wherein to transmit the health value to the remote server, the instructions, when executed, cause the power bank device to:
transmit, via a wireless connection between the one or more transceivers and the rechargeable device, the health value, wherein transmitting the health value to the rechargeable device causes the rechargeable device to relay the health value to the remote server.

### Claim 8 (depends on 1)

The power bank device of claim 1, wherein the electrical connection between the power bank battery and the rechargeable device battery comprises a wireless electrical connection between the power bank device and the rechargeable device.

### Claim 9 (depends on 1)

The power bank device of claim 1, wherein the electrical connection between the power bank battery and the rechargeable device battery comprises a wired electrical connection between the power bank and the rechargeable device.

### Claim 10 (depends on 1)

The power bank device of claim 1, further comprising:
a temperature sensor configured to sense a temperature of the power bank device; wherein:
the memory is configured to store one or more lookup tables associating temperature values with respective temperature correction factors, and
to compare the present capacity of the power bank battery to the nominal capacity of the power bank battery, the instructions, when executed, cause the power bank device to:
obtain a temperature value from the temperature sensor,
based on the temperature value, obtain, from the one or more lookup tables, the respective temperature correction factor,
generate an adjusted present capacity by applying the temperature correction factor to the present capacity of the power bank battery, and
compare the adjusted present capacity to the nominal capacity of the power bank battery.