Skip over navigation
CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY (for digital computers G06F 1/18; circuits or apparatus for the conversion of electric power, arrangements for control or regulation of such circuits or apparatus H02M; interrelated control of several motors, control of a prime-mover/generator combination H02P; control of high-frequency power H03L; additional use of power line or power network for transmission of information H04B)
Definition statement
This subclass/group covers:
  • ac and/or dc supplying systems
  • ac and/or dc distribution networks
  • circuit arrangements for battery supplies, including charging or control thereof, or co-ordinated supply from two or more sources of any kind
  • circuit arrangement providing remote indication and control of a network switch
  • systems for supplying or distributing electric power by electromagnetic waves
References relevant to classification in this subclass
This subclass/group does not cover:
Aircraft networks
Vessels networks
Power supplies for movable barriers, electric doors, electric sunshades
Circuit arrangements for digital computers
Circuits or apparatus for the conversion of electric power, arrangements for control or regulation of such circuits or apparatus
Control of a single motor or generator, of the types covered by subclass H02N
Control of a single motor or generator
Control of high-frequency power
Informative references
Attention is drawn to the following places, which may be of interest for search:
Additional use of power line or power network for transmission of information
Special rules of classification within this subclass

Claimed devices, systems, and methods always have to be classified. If there is additional information disclosed, then at least an Indexing Code for additional information must be allocated.

If an orthogonal indexing code of the H02J2000/00-series (only for additional information) is given, it must always be accompanied by a regular classification symbol under H02J, for invention or additional information. If not, the retrieval of the document turns more complicated. For example if a document gets the code H02J 2003/001 only, the document will not be automatically retrieved when checking the documents having H02J 3/00 as additional information. On practice, the document will not be considered part of the H02J 3/00 collection.

For example a battery protection circuitry in a docking station requires at least an Indexing Code H02J 7/0044 besides the group symbol H02J 7/0029+.

Glossary of terms
In this subclass/group, the following terms (or expressions) are used with the meaning indicated:
Wireless energy transfer
non-conductive energy transfer, even if conductors can be used for implementing the separated sending and receiving units
Circuit arrangements for dc mains or dc distribution networks
References relevant to classification in this group
This subclass/group does not cover:
Power supplies for computers
Power supplies for vehicle components
Power supplies for memories
Power supplies for dc lamps
Load protection by tripping of the load for dc systems
Details for dc/dc converters
Fuel cells
Special rules of classification within this group

The following Indexing Codes are to be used for classifying additional information:

dc supply with intermediated ac distribution
dc supply with at least two different dc voltage levels (e.g: 14V and 42V in certain vehicles)
use of fuel cells for ac or dc power generation (e. g. for UPS, load balancing, economic power management...)
T02J7/00J
Provisions for temporary connection of dc sources of essentially the same voltage, e.g. jumpstart cables, etc.
Arrangements for reducing harmonics or ripples (in converters H02M 1/14)
References relevant to classification in this group
This subclass/group does not cover:
Arrangements for reducing harmonics or ripples in converters
Parallel operation of dc sources (involving batteries H02J 7/34)
Definition statement
This subclass/group covers:

Circuit arrangements, systems and methods for the parallel connection of DC sources. Parallel operation must be interpreted as the operational characteristics allowing that the parallel-connected sources supply the load, for instance, how to share the load among the different sources, or how to sequentially switch different power sources on.

References relevant to classification in this group
This subclass/group does not cover:
Parallel operation of dc sources involving batteries
{being switching converters (H02J 1/108, H02J 1/12 take precedence) }
Definition statement
This subclass/group covers:

Parallel operation of DC sources, where the sources are switched mode power supplies (SMPS), i.e. power electronic converters with a DC output.

References relevant to classification in this group
This subclass/group does not cover:
Parallel operation of dc sources using diodes blocking reverse current flow
Parallel operation of dc generators with converters, e.g. with mercury-arc rectifier
Informative references
Attention is drawn to the following places, which may be of interest for search:
Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using semiconductor devices as final control devices for a single load
Single converters with a plurality of output stages connected in parallel
{using diodes blocking reverse current flow (H02J 1/12 takes precedence) }
References relevant to classification in this group
This subclass/group does not cover:
Parallel operation of dc generators with converters, e.g. with mercury-arc rectifier
Balancing the load in a network (by batteries H02J 7/34)
Definition statement
This subclass/group covers:

Balancing the load in a DC distribution network, either by avoiding overloading one section of the network, or by load shedding

References relevant to classification in this group
This subclass/group does not cover:
Parallel operation of dc sources involving batteries
Circuit arrangements for ac mains or ac distribution networks
Definition statement
This subclass/group covers:
  • Arrangements for selectively connecting the load to one among a plurality of power lines or power sources
  • Arrangements for reducing harmonics or ripples
  • Arrangements using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
  • Arrangements for connecting networks of the same frequency but supplied from different sources
  • Constant-current supply systems
  • Arrangements for adjusting, eliminating, or compensating reactive power in networks
  • Arrangements for preventing or reducing oscillations of power in networks
  • Arrangements for eliminating or reducing asymmetry in polyphase networks
  • Arrangements for balancing of the load in a network by storage of energy
  • Arrangements for transfer of electric power between networks of substantially different frequency
  • Arrangements for transfer of electric power between ac networks via a high-tension dc link
  • Arrangements for parallely feeding a single network by two or more generators, converters or transformers
References relevant to classification in this group
This subclass/group does not cover:
Electromechanical details
Computer systems for trading
Systems, methods for trading (electricity/gas/water)
G06Q50/00C
Harmonic reduction application for converters
Load protection by tripping of the load for ac systems
Details of switches for load protection
Mechanical details of connectors
Preventing/reducing oscillation with a single generator
Details of converters for reactive power compensation and ac power generation from dc sources
Details of converters for hvdc
Wind turbines
Photovoltaic panel
Informative references
Attention is drawn to the following places, which may be of interest for search:
When searching in H0J3/00T see also computer systems for trading
When searching in H0J3/36
H02J 3/38: Parallel connections of dc/ac converters
Special rules of classification within this group

The Indexing Code H02J 3/32 and/or H02J 3/008 is assigned for covering the idea of using parked electric vehicle batteries for feeding the network during peak times and/or selling energy.

The following Indexing Codes are to be used for classifying additional information:

methods and systems for forecasting future load demands
methods to deal with contingencies in the widest meaning
compensation of flicker introduced by nonlinear loads
planning, simulating, CAD, modelling, reliability checks, etc.
household appliances management
switching loads on and off in function of energy prices
means for the reduction or elimination of harmonics or oscillations in high voltage dc link (hvdc)
Disconnection of a local power supply from the network
{Arrangements for selectively connecting the load to one among a plurality of power lines or power sources (for providing uninterruptable power supply H02J 9/00) }
References relevant to classification in this group
This subclass/group does not cover:
Arrangements for providing uninterruptable power supply
Arrangements for reducing harmonics or ripples (in converters H02M 1/12)
References relevant to classification in this group
This subclass/group does not cover:
Arrangements for reducing harmonics or ripples in converters
Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
References relevant to classification in this group
This subclass/group does not cover:
Controlling transfer of power, sharing load between a generator and the connected network
Arrangements for adjusting, eliminating, or compensating reactive power in networks (for adjustment of voltage H02J 3/12; use of Petersen coils H02H 9/08)
Informative references
Attention is drawn to the following places, which may be of interest for search:
Arrangements for adjustment of voltage
Arrangements for use of Petersen coils
{wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters}
Informative references
Attention is drawn to the following places, which may be of interest for search:
if the bridge combines both series and shunt compensators
Arrangements for preventing or reducing oscillations of power in networks (by control effected upon a single generator H02P 9/00)
Definition statement
This subclass/group covers:

Circuit arrangements, devices and methods for preventing, avoiding or correcting oscillations of voltage, current or power in an AC power network

References relevant to classification in this group
This subclass/group does not cover:
Control effected upon a single generator
Arrangements for parallely feeding a single network by two or more generators, converters or transformers
References relevant to classification in this group
This subclass/group does not cover:
Parallel connections of dc/ac converters not for feeding a network, but a local load
Circuit arrangements for mains of distribution networks not specified as ac or dc
Definition statement
This subclass/group covers:

Circuit arrangements for mains of distribution networks containing both ac and dc (for instance, for planes) or for (rarely) networks whose nature (AC or DC) is not specified

Circuit arrangements for transfer of electric power between ac networks and dc networks (H02J 3/36 takes precedence)
Definition statement
This subclass/group covers:

Circuit arrangements, systems and methods for supplying a DC load from an AC power source. Only general purpose circuits (not application-oriented/driven) are classified here.

References relevant to classification in this group
This subclass/group does not cover:
Circuit arrangements for dc mains or dc distribution networks
Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
Arrangements for transfer of electric power between ac networks via a high-tension dc link
Arrangements for parallely feeding a single network by two or more generators, converters or transformers
Details for sending and receiving coils
Ac/dc or dc/ac converters
Special rules of classification within this group

A system used for feeding an ac distribution network from the output of dc power source like fuel cells, solar panels belongs to H02J 3/38 and not to H02J 5/00, even if a dc to ac transfer is involved.

{with inductive power transfer (for charging H02J 7/025) }
Definition statement
This subclass/group covers:

Circuit arrangements for transfer of electric power between ac networks and dc networks by inductive transfer, i.e. the sending coil being part of the source and the receiving coil being part of the load and coupling is in the near field region.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Transmission involving transformers
Near-field transmission systems, e.g. inductive loop type
Transmission by means of electromagnetic waves, e.g. microwave, RF, and far-field inductive coupling. In practice, long distance wireless transmission
Special rules of classification within this group

H02J 5/005 should be allocated even, if the power source is not ac mains or if it is not better specified. For example, if the power source is a fuel cell, H02J 5/005 has to be allocated, and additionally H02J 2001/004

With regard to wireless power transfer vs wireless battery charging; any document with relevant technical features about near-field inductive power transfer, should come here. If it is involved in battery charging, then double classification under H02J 7/025 must be considered.

Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
Definition statement
This subclass/group covers:

Circuit arrangements for charging batteries. Rarely, general-purpose discharging, battery management, e.g. sequentially discharging batteries, or load-supplying, e.g. when they are not too concerned by the characteristics of the load.

References relevant to classification in this group
This subclass/group does not cover:
Batteries mechanical, chemical details
Details of converter
Testing of batteries
G01R36/00
Control of alternators
Vehicle starting circuits
Electrical circuits for vehicles
Charging electric/hybrid vehicles
Perpetuum mobile
Mechanical details of battery charger alternators
Details of telephone stands
Informative references
Attention is drawn to the following places, which may be of interest for search:
Near-field transmission systems, e.g. inductive loop type
For over-discharge protection
Special rules of classification within this group

If the document deals with the controlled charging of a capacitor, e.g. a supercapacitor, it is mandatory to assign a combination of the Indexing Code H02J 7/345 and CPC group symbols, which would apply, if the capacitor was replaced with a battery.

The following Indexing Codes are to be used for classifying additional information:

Circuits in which a system component (battery, battery charger...) checks compatibility with another component (power source...)
managing load supply from one or more batteries, e.g.: discharge current reduction at low state of charge, sequential battery discharge in plural battery systems
means for power supply of control circuit
charger exchanges data with telephone or electronic device whose internal battery are being charged
data exchange between smart battery and charger
overcharge protection
overcurrent protection
overdischarge protection
detection of fully charged condition
remaining charge detection
characterised by the converter
charge provided using dc bus or data bus of computer
charge provided using USB port connectors
means for power supply of control circuit
charger exchanges data with telephone or electronic device whose internal battery are being charged
data exchange between smart battery and charger
multiple generators
{Stations for charging mobile units, e.g. of electric vehicles, of mobile telephones (H02J 7/0021, H02J 7/0026 take precedence) }
Definition statement
This subclass/group covers:

Battery charging characterized by a physical or electrical arrangement allowing the simultaneous charge of a plurality, i.e. two or more, of mobile units, e.g. mobile phones, machine-tools or electric/hybrid vehicles.

References relevant to classification in this group
This subclass/group does not cover:
Monitoring or indicating circuits
Safety or protection circuits, e.g. overcharge/discharge disconnection
Details of stations for charging electric vehicles, e.g. vehicle recognition or identification, billing or payment, charging columns for electric vehicles, automatic adjustment of relative position, vehicle to grid (V2G) arrangements.
{the charge cycle being terminated in response to electric parameters (H02J 7/0093 takes precedence) }
Definition statement
This subclass/group covers:
  • Controlling charge in response to current
  • Controlling charge in response to voltage
  • Controlling charge in response to both current and voltage
References relevant to classification in this group
This subclass/group does not cover:
Regulation of charging current or voltage with introduction of pulses during the charging process
Synonyms and Keywords

In the definition H02J 7/0077 and subgroups the word "terminated" has to be interpreted as "controlled"

{using non-contact coupling, e.g. inductive, capacitive}
Definition statement
This subclass/group covers:

Non-contact coupling, i.e. the sending coil or the first capacitor plate being part of the supplying source and the receiving coil or the second capacitor plate being part of the energy receiving circuit and coupling is in the near field region.

Informative references
Attention is drawn to the following places, which may be of interest for search:
Near-field transmission systems, e.g. inductive loop type
Special rules of classification within this group

H02J 7/025 should be applied even if charging source is not ac mains or not better specified. For example if the charging source is a photovoltaic cell, not only H02J 7/35 has to be applied, but also H02J 7/025. If there are relevant features about the wireless power transfer itself, then H02J 5/005 or H02J 17/00 must be considered for further classification.

Parallel operation in networks using both storage and other dc sources, e.g. providing buffering (H02J 7/14 takes precedence)
Definition statement
This subclass/group covers:

Battery charging where power comes from one or more different DC power sources, e.g. charging from solar arrays. It may further involve the supply of a load and the resulting modes of operation (battery charging, battery supplying the load).

References relevant to classification in this group
This subclass/group does not cover:
Arrangements for balancing of the load in an AC network by storing energy using batteries with converting means
Circuit arrangements for charging batteries from dynamo-electric generators driven at varying speed
Circuit arrangement for emergency or standby power supply, e.g. for emergency lighting (with provision for charging standby battery H02J 7/00)
Definition statement
This subclass/group covers:

Power sources acting when the main source fails, i.e. uninterruptible (on-line and off-line) power supplies [UPS] and back-up power supplies

Power supplies able to operate in a "standby" mode (low power or sleep modes). It is common practice (even at IPC level) to classify them under H02J 9/00

References relevant to classification in this group
This subclass/group does not cover:
Circuit arrangement for emergency or standby power supply with provision for charging standby battery
UPS for computers
UPS for communication stations
Details of lamp
Special rules of classification within this group

The following Indexing Codes are to be used for classifying additional information:

T02J9/00S11
power saving operation when no load is present
common neutral
using a single transformer with multiple primaries (one for each ac energy source) and a secondary for the loads
electronic means for switching from one power supply to another, avoiding parallel connection
in which an auxiliary distribution system and its associated lamps are brought into service
Definition statement
This subclass/group covers:

Emergency light systems integrated typically by a back-up power source, a set of lamps and a dedicated auxiliary distribution system powering the lamps from the back-up power source

Informative references
Attention is drawn to the following places, which may be of interest for search:
A lamp not being an emergency lamp, but a lamp which is normally fed by the mains and during contingency by a battery, even if no dc/ac converters are not involved
{characterised by the use of electronic means (H02J 9/062 and H02J 9/065 take precedence) }
Definition statement
This subclass/group covers:

Emergency, back-up or standby power supplies integrating power electronic converters for the different power conversions within the units: e.g. rectifiers, battery chargers, voltage regulators. Since H02J 9/062 and H02J 9/065 take precedence, in practice, this code covers UPS with a DC output

References relevant to classification in this group
This subclass/group does not cover:
Electronic means consisting of non rotating dc/ac converter, e.g. UPS with an AC output
Circuit arrangements for providing service supply to auxiliaries of stations in which electric power is generated, distributed, or converted (emergency or standby arrangements H02J 9/00)
References relevant to classification in this group
This subclass/group does not cover:
Emergency or standby arrangements
Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuit-breaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network { (circuits for indication of single switches H01H 9/167; circuits specially adapted for remote switching of lighting via the power line H05B 37/0263) }
Definition statement
This subclass/group covers:

H02J 13/00 covers operation-related documents, i.e. there must be at least switching on/off or generator or load (or information of such an event) or any other similar action (i.e. sending settings of an inverter connecting a photovoltaic array to the power network.

It also covers specific monitoring of power networks (tailored to such application).

Concerning smart grids, documents where the relevant features concern electrical engineering and not ICT technologies, are classified here.

References relevant to classification in this group
This subclass/group does not cover:
Measuring of electrical variables)
Electricity meters involved (in particular smart meters)
Power strips with locally controlled on/off capability for computers
Remote operation of appliances
Details of switches
Circuits for indication of single switches
Power strips with locally controlled on/off capability
Telemetry
Remote switching of lightings
Circuits specially adapted for remote switching of lighting via the power line
Informative references
Attention is drawn to the following places, which may be of interest for search:
Monitoring
Programmed control systems
Computer aided design (CAD), simulation, modelling
Computing for organisational, economical, commercial, marketing purposes
Measured data transmission systems
Communication using power lines (PLC, power line carrier)
Details of data switching networks
Systems for storing electric energy (mechanical systems therefor F01 to F04; in chemical form H01M)
Definition statement
This subclass/group covers:

Energy storage systems having either relevant power management issues, or having (or be ready/able for) an interaction with the (AC or DC) power network (but with focus on the storage system). The subject-matter stays normally at system level (there are other CPC technical fields dealing with the specific storage technologies). Under this approach, the group has two subdivisions according to two different technologies:

  • Systems for storing electric energy in the form of hydraulic energy
  • Systems for storing electric energy in the form of pneumatic energy
References relevant to classification in this group
This subclass/group does not cover:
Conjoint control of energy storage in vehicles
Details of mechanical systems
Details of accumulators for supplying fluids under pressure
Thermal storage - cold
Thermal storage - heaters
Thermal storage - heat
Capacitors
Batteries mechanical, chemical details
Fly-wheel generators
Informative references
Attention is drawn to the following places, which may be of interest for search:
Arrangements for balancing of the load in an AC network by storage of energy
Systems for supplying or distributing electric power by electromagnetic waves
References relevant to classification in this group
This subclass/group does not cover:
Inductive power transmission
Antennas, e.g. rectennas, i.e. antennas for power transfer
Near-field transmission systems
This page is owned by Office of Patent Classification.
Last Modified: 10/11/2013