CN107364366A - A kind of electric charging controller for electric motor vehicle - Google Patents

A kind of electric charging controller for electric motor vehicle Download PDF

Info

Publication number
CN107364366A
CN107364366A CN201710845065.XA CN201710845065A CN107364366A CN 107364366 A CN107364366 A CN 107364366A CN 201710845065 A CN201710845065 A CN 201710845065A CN 107364366 A CN107364366 A CN 107364366A
Authority
CN
China
Prior art keywords
battery
charging
electric
motor switch
control unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710845065.XA
Other languages
Chinese (zh)
Inventor
李文
章海燕
张先存
黄琦杰
盛士杰
胡艳浩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HEFEI KELLY TECHNOLOGY INVESTMENT CO LTD
Original Assignee
HEFEI KELLY TECHNOLOGY INVESTMENT CO LTD
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HEFEI KELLY TECHNOLOGY INVESTMENT CO LTD filed Critical HEFEI KELLY TECHNOLOGY INVESTMENT CO LTD
Priority to CN201710845065.XA priority Critical patent/CN107364366A/en
Publication of CN107364366A publication Critical patent/CN107364366A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14Conductive energy transfer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/60Monitoring or controlling charging stations
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00Type of vehicles
    • B60L2200/12Bikes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00Type of vehicles
    • B60L2200/46Vehicles with auxiliary ad-on propulsions, e.g. add-on electric motor kits for bicycles
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/72Electric energy management in electromobility
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/12Electric charging stations
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/14Plug-in electric vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

A kind of electric charging controller for electric motor vehicle, including MCU control unit, charging circuit, battery, electric power detection module, time recording module, electricity quantity display module, charging interval display module and motor switch one, charging circuit includes charging inlet successively, rectifier filter one, transformer, rectifier filter two, MCU control unit is connected with transformer, control its work, rectifier filter is connected with battery, give its charging, battery is provided with power input lines, electric power detection module signal receiving end is connected with battery, signal output part is connected by MCU control unit with electricity quantity display module, motor switch one is provided between rectifier filter two and battery, time recording module signal receiving end is connected on motor switch one and battery connecting line, signal output part is connected by MCU control unit with charging interval display module.Powerful instant invention overcomes the deficiencies in the prior art, the scope of application is wide, greatly improves the service life of battery.

Description

A kind of electric charging controller for electric motor vehicle
Technical field
The present invention relates to electric car charging technique field, a kind of electric charging controller for electric motor vehicle is particularly belonged to.
Background technology
Electric charging controller for electric motor vehicle be exclusively for electric car storage battery configuration a charging equipment, the classification of charger: And have, without power frequency(50 hertz)Transformer is distinguished, and can be divided into two major classes.Shipping three-wheel charger typically uses band Industrial Frequency Transformer Charger, volume is big, weight is big, power-consuming, but reliably, cheaply;Electric bicycle and electricity, which rub, then uses so-called Switching Power Supply Formula charger, power saving, efficiency high, but it is perishable.The correct operation of switch power supply type charger is:During charging, first inserting battery, after Add civil power;After abundance, be initially switched off civil power, after pull out battery plug.If first pull out battery plug, particularly charging current in charging Greatly(Red light)When, it is very easy to damage charger.
Conventional switch power supply type charger is divided to semibridge system and single sharp major class of formula two again, and single sharp class is divided into positive activation type and instead again Swash the class of formula two.Semibridge system cost is high, and performance is good, is usually used in the charger with negative pulse;Single sharp formula cost is low, occupation rate of market It is high.
It is existing wherein as the development of electric automobile, traditional electric charging controller for electric motor vehicle can not meet the market demand Although some chargers have cutting function fully charged when, charger is in itself or standby, while electric car On standby components consumption electric power some electrical power after, when electric power reaches charge condition, charger may proceed to electricity again Pond is charged, reciprocal with this, and the service life of battery greatly reduces.
The content of the invention
It is an object of the invention to provide a kind of electric charging controller for electric motor vehicle, the deficiencies in the prior art are overcome, when adding Between logging modle and charging interval display module, be provided with motor switch one between charging current output end and battery, time note Record module by signal receiving terminal is connected on motor switch one and battery connecting line, when battery electric quantity finishes, by electronic The connection of the cut-out charging current of switch one and battery, farthest protect battery, while passage time logging modle records The time required to charging is true every time, the next reasonable arrangement charging interval has been easy to, while electricity is set on battery electric power output line Dynamic switch two and the motor switch three to short-circuit the battery, when charging finishes, if charger continues to be connected on power supply Wait, power is provided to the standby components on automobile using charger, it is powerful so as to keep battery electric power not to be lost, it is applicable Wide scope, greatly improve the service life of battery.
To solve the above problems, the technical solution used in the present invention is as follows:
A kind of electric charging controller for electric motor vehicle, including MCU control unit, charging circuit, battery, electric power detection module, time record Module, electricity quantity display module, charging interval display module and motor switch one, described charging circuit include charging successively Mouth, rectifier filter one, transformer, rectifier filter two, described MCU control unit are connected with transformer, control its work, Described rectifier filter is connected with battery, gives its charging, and described battery is provided with power input lines, described electric power detection Module by signal receiving terminal is connected with battery, signal output part is connected by MCU control unit with electricity quantity display module, and described is whole Motor switch one is provided between stream wave filter two and battery, described time recording module signal receiving end is connected to motor switch One with battery connecting line, signal output part be connected by MCU control unit with charging interval display module, described driven opening One is closed to be connected with MCU control unit, be controlled by opening or closing.
Further, in addition to motor switch two and motor switch three, described motor switch two are arranged on power input lines On, described one end of motor switch three is connected on motor switch two and the connecting line of rectifier filter two, the other end is connected to electricity On power output line free end, described motor switch two and motor switch three are connected with MCU control unit, are controlled by opening Or close.
Further, described electricity quantity display module and charging interval display module are arranged on electric car instrument board.
Further, described charging inlet is water-proof type charging inlet.
Compared with prior art, implementation result of the invention is as follows by the present invention:
A kind of electric charging controller for electric motor vehicle of the present invention, adds time recording module and charging interval display module, is charging Motor switch one is provided between current output terminal and battery, time recording module signal receiving end is connected to motor switch one and electricity On the connecting line of pond, when battery electric quantity finishes, the connection of charging current and battery, maximum journey are cut off by motor switch one The protection battery of degree, while passage time logging modle records the time required to charging is true every time, has been easy to next rationally peace Arrange the charging interval, while motor switch two and the motor switch three to short-circuit the battery are set on battery electric power output line, filling When electricity finishes, if charger continues to be connected on power supply, provided and moved to the standby components on automobile using charger Power, powerful so as to keep battery electric power not to be lost, the scope of application is wide, greatly improves the service life of battery.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention.
Embodiment
With reference to embodiment, the invention will be further described, but the present invention is not limited only to these examples, to be de- On the premise of from present inventive concept, carried out by it is any improvement be within the scope of the present invention.
As illustrated, a kind of electric charging controller for electric motor vehicle of the present invention, including MCU control unit, charging circuit, electricity Pond, electric power detection module, time recording module, electricity quantity display module, charging interval display module and motor switch one, it is described Charging circuit successively include charging inlet, rectifier filter one, transformer, rectifier filter two, described MCU control unit with Transformer connection, its work is controlled, described rectifier filter is connected with battery, gives its charging, and described battery is provided with electricity Power output line, described electric power detection module signal receiving end is connected with battery, signal output part passes through MCU control unit and electricity Display module connection is measured, motor switch one, described time recording module are provided between described rectifier filter two and battery Signal receiving end is connected on motor switch one and battery connecting line, signal output part passes through MCU control unit and charging interval Display module connects, and described motor switch one is connected with MCU control unit, is controlled by opening or closing.
Further, in addition to motor switch two and motor switch three, described motor switch two are arranged on power input lines On, described one end of motor switch three is connected on motor switch two and the connecting line of rectifier filter two, the other end is connected to electricity On power output line free end, described motor switch two and motor switch three are connected with MCU control unit, are controlled by opening Or close.
Further, described electricity quantity display module and charging interval display module are arranged on electric car instrument board.
Further, described charging inlet is water-proof type charging inlet.

Claims (4)

1. a kind of electric charging controller for electric motor vehicle, including MCU control unit, charging circuit and battery, described charging circuit is successively Including charging inlet, rectifier filter one, transformer, rectifier filter two, described MCU control unit is connected with transformer, Its work is controlled, described rectifier filter is connected with battery, gives its charging, and described battery is provided with power input lines, its It is characterised by:Also include electric power detection module, time recording module, electricity quantity display module, charging interval display module and electronic Switch one, described electric power detection module signal receiving end is connected with battery, signal output part passes through MCU control unit and electricity Display module is connected, and motor switch one, described time recording module letter are provided between described rectifier filter two and battery Number receiving terminal be connected to motor switch one with battery connecting line, signal output part shown by MCU control unit and charging interval Show that module connects, described motor switch one is connected with MCU control unit, is controlled by opening or closing.
A kind of 2. electric charging controller for electric motor vehicle according to claim 1, it is characterised in that:Also include motor switch two and electricity Dynamic switch three, described motor switch two is arranged on power input lines, and described one end of motor switch three is connected to driven opening Close on two and the connecting line of rectifier filter two, the other end is connected on power input lines free end, the described He of motor switch two Motor switch three is connected with MCU control unit, is controlled by opening or closing.
A kind of 3. electric charging controller for electric motor vehicle according to claim 1, it is characterised in that:Described electricity quantity display module and Charging interval display module is arranged on electric car instrument board.
A kind of 4. electric charging controller for electric motor vehicle according to claim 1, it is characterised in that:Described charging inlet is waterproof Formula charging inlet.
CN201710845065.XA 2017-09-19 2017-09-19 A kind of electric charging controller for electric motor vehicle Pending CN107364366A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710845065.XA CN107364366A (en) 2017-09-19 2017-09-19 A kind of electric charging controller for electric motor vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710845065.XA CN107364366A (en) 2017-09-19 2017-09-19 A kind of electric charging controller for electric motor vehicle

Publications (1)

Publication Number Publication Date
CN107364366A true CN107364366A (en) 2017-11-21

Family

ID=60303036

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710845065.XA Pending CN107364366A (en) 2017-09-19 2017-09-19 A kind of electric charging controller for electric motor vehicle

Country Status (1)

Country Link
CN (1) CN107364366A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110497805A (en) * 2018-05-17 2019-11-26 比亚迪股份有限公司 The battery charge controller and method of electric vehicle

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH118941A (en) * 1997-06-16 1999-01-12 Mitsubishi Heavy Ind Ltd Battery unit fitted with charger
JP2002186113A (en) * 2000-12-13 2002-06-28 Sumitomonacco Materials Handling Co Ltd Battery charger for battery system of electric vehicle
CN201143884Y (en) * 2007-09-10 2008-11-05 比亚迪股份有限公司 Electric vehicle conductive vehicle-mounted charging power
CN104870242A (en) * 2013-01-15 2015-08-26 易跑北欧公司 Battery charging system for electric vehicle
CN206099468U (en) * 2016-10-26 2017-04-12 深圳市金铂乐电子科技有限公司 Multislot charger with LCD shows
CN106627228A (en) * 2016-12-27 2017-05-10 安徽本纪智能科技有限公司 Electric control system of new energy automobile
CN107150607A (en) * 2017-06-08 2017-09-12 合肥凯利科技投资有限公司 A kind of intelligent charger

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH118941A (en) * 1997-06-16 1999-01-12 Mitsubishi Heavy Ind Ltd Battery unit fitted with charger
JP2002186113A (en) * 2000-12-13 2002-06-28 Sumitomonacco Materials Handling Co Ltd Battery charger for battery system of electric vehicle
CN201143884Y (en) * 2007-09-10 2008-11-05 比亚迪股份有限公司 Electric vehicle conductive vehicle-mounted charging power
CN104870242A (en) * 2013-01-15 2015-08-26 易跑北欧公司 Battery charging system for electric vehicle
CN206099468U (en) * 2016-10-26 2017-04-12 深圳市金铂乐电子科技有限公司 Multislot charger with LCD shows
CN106627228A (en) * 2016-12-27 2017-05-10 安徽本纪智能科技有限公司 Electric control system of new energy automobile
CN107150607A (en) * 2017-06-08 2017-09-12 合肥凯利科技投资有限公司 A kind of intelligent charger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110497805A (en) * 2018-05-17 2019-11-26 比亚迪股份有限公司 The battery charge controller and method of electric vehicle

Similar Documents

Publication Publication Date Title
CN102570546B (en) A kind of mobile terminal and charger, method
CN205489660U (en) Portable power source of USBA type interface with TYPE -C interface and general
CN105226775A (en) The nondissipative equalization method of lithium ion battery of electric automobile group
CN102299538B (en) Charging method of parallel connection heavy-current direct-current electric automobile charging post system
CN211266507U (en) Portable power supply based on retired power battery module
CN107017688A (en) A kind of cell managing device for being integrated with DC DC functions
CN109849669A (en) A kind of electric power supply control system of pure electric automobile car-mounted terminal
CN105305570A (en) High-efficiency charging pile system
CN107364366A (en) A kind of electric charging controller for electric motor vehicle
CN203707839U (en) Intelligent vehicle power supply rescue device
CN202518115U (en) Low-voltage power supply for electric vehicle
CN104638739A (en) Direct-current charger control system based on FPGA (Field Programmable Gate Array) and Profibus (Process field bus)
CN204794344U (en) A multichannel power supply system for vehicle event data recorder power supply
CN206450809U (en) A kind of onboard charger detection means
CN206834810U (en) A kind of BMS charging detecting circuits of band activation function
CN202190104U (en) Parallel-connected high-current DC charging post system for electric vehicles
CN203218899U (en) Intelligent charging system of electric automobile accessory battery
CN205787045U (en) Battery for electric automobile bag communication test instrument
CN204905974U (en) Vehicle charger
CN107150607A (en) A kind of intelligent charger
CN205489722U (en) Electric vehicle charger with portable power supply
CN105186664B (en) A kind of vehicle power supply
CN209719268U (en) A kind of electric power supply control system of pure electric automobile car-mounted terminal
CN211731070U (en) Charging device for starting battery power shortage of electric automobile
CN104682522B (en) A kind of charger for battery

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20171121

WD01 Invention patent application deemed withdrawn after publication