CN206718998U - Electric automobile intelligent AC charging pile - Google Patents
Electric automobile intelligent AC charging pile Download PDFInfo
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- CN206718998U CN206718998U CN201720277263.6U CN201720277263U CN206718998U CN 206718998 U CN206718998 U CN 206718998U CN 201720277263 U CN201720277263 U CN 201720277263U CN 206718998 U CN206718998 U CN 206718998U
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- amplifier
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- isolation optocoupler
- signals
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The utility model provides a kind of electric automobile intelligent AC charging pile, including CPU, isolation optocoupler, CP signal generating circuits, CP signal feedback circuits and charging gun interface, the I/O mouths of the CPU are connected with isolation optocoupler T1, the output end of the isolation optocoupler T1 is connected with the CP signal generating circuits, the CP signal generating circuits export CP1 signals, the CP1 signals are divided into two-way, are connected all the way with the charging gun interface, and another way is connected to CPU AD sampling channels through CP signal feedback circuits.The utility model improves the jamproof ability of signal using isolation optocoupler, and the closed-loop control of CP1 signals is realized using CP signal feedback circuits, improves the stability and reliability of charging pile.
Description
Technical field
Charging pile technical field is the utility model is related to, more particularly to a kind of electric automobile intelligent AC charging pile.
Background technology
With the continuous enhancing of whole world energy-conservation and environmental consciousness, the ev industry of new energy field develops rapidly.With
This simultaneously, in order to better meet the demand of client, in the various public places such as market hotel layout charging piles be can not
The trend of reverse, charging pile are to belong to the equipment operated to electricity, then charging safety is most important one in charging pile
Part.
A kind of communication mechanism is needed between alternating-current charging pile and electric automobile, charging pile control guidance circuit is sent
The pwm signal (CP) of 1kHz different duty, after being connected with car, the signal fed back is measured, realizes power
Matching and connection confirm function, due to being a kind of communication confirming mechanism with car, so reliability requirement is higher.
The control guidance circuit of alternating-current charging pile, which is substantially, at present produces positive PWM ripples, then enters CPU by decompression
AD passages measure, such circuit has two comparison distinct issues：1st, it has been directly connected to protection the earth power supply
PE, when front end PE is not reliably connected, potential safety hazard be present；2nd, CP is signally attached to car end, and circuit is longer, easily seals in interference.
Utility model content
Technical problem to be solved in the utility model is：In order to overcome deficiency of the prior art, the utility model carries
For a kind of electric automobile intelligent AC charging pile, by controlling guidance circuit, by PWM wave generation circuits and magnitude of voltage measuring circuit
Electrical isolation is carried out with core cpu circuit, isolation is pressure-resistant to reach 2000V, when CP signals seal in interference, does not interfere with charging pile
Main circuit.
The utility model solves its technical problem technical scheme to be taken：A kind of electric automobile intelligent AC charging
Stake, including control guidance circuit, it is anti-that the control guidance circuit includes CPU, isolation optocoupler, CP signal generating circuits, CP signals
Current feed circuit and charging gun interface, the I/O mouths of the CPU are connected with isolation optocoupler T1, the output end of the isolation optocoupler T1 and institute
State the connection of CP signal generating circuits, the CP signal generating circuits export CP1 signals, and the CP1 signals are divided into two-way, all the way with
The charging gun interface connection, another way are connected to CPU AD sampling channels through CP signal feedback circuits.Isolation optocoupler T1 is used
ACPL-M50L-000E, for the isolation of the CP1_PWM pulses of CPU outputs, isolation optocoupler T1 primary side side anode passes through resistance
R3 connection 3.3V power supply VCC1, the power end VCC of secondary side are connected to+VCC2 power supplys, and ground terminal GND is connected to-VCC2 power supplys, and
By the filtering of electric capacity C8 progress+VCC2 power supplys and-VCC2 power supplys, VCC2 is 12V power supplys, and VEE is the ground of 12V power supplys.
Specifically, the CP signal generating circuits include triode Q1 and Q2 and resistance R1, R4, R6 and R12, the electricity
Hinder R4 and R6 series connection, the other end of the resistance R4 is connected to power supply+VCC2, the resistance R6 other end respectively with described three
Pole pipe Q1 is connected with Q2 base stage, and the public exit of the resistance R4 and R6 is connected with the output end of the isolation optocoupler T1,
The resistance R1 is serially connected between colelctor electrode and the power supply+VCC2 of the triode Q1, and the resistance R12 is serially connected in three pole
Between pipe Q2 colelctor electrode and power supply-VCC2, the emitter stage of the triode Q1 is connected with triode Q2 emitter stage, and public
Exit exports CP1 signals.
Specifically, the CP signal feedback circuits include pressure filter circuit, voltage isolation optocoupler circuit, difference amplifier electricity
Road, rc filter circuit and circuit is followed, the pressure filter circuit includes diode D1, resistance R5, R7 and R11 and electricity
Hold C7, the anode connection CP1 signals of the diode D1, the negative electrode of the diode D1 is sequentially connected in series resistance R5 and R7, described
Resistance R5 connects resistance R11 with R7 public exit and connects ground VEE, and described electric capacity C7 one end and resistance R7 output end connect
Connect, the other end is connected to the ground VEE；The voltage isolation optocoupler circuit includes isolation optocoupler U2, the input of the isolation optocoupler U2
VIN connection resistance R7 output end is held, the isolation optocoupler U2 includes positive output end VOUT+ and inverse output terminal VOUT-；Institute
Stating difference operational amplifying circuit includes amplifier U3A, resistance R2, R8, R10 and R13, and electric capacity C4 and C10, the resistance R8 is connected on described
Between positive output end VOUT+ and amplifier U3A positive input, the resistance R10 is connected on the inverse output terminal VOUT-
Between amplifier U3A reverse input end, ground VSSA and amplifier U3A forward direction is serially connected in after resistance R2 and electric capacity the C4 parallel connections
Between input, amplifier U3A reverse input end and amplifier U3A output are serially connected in after resistance R13 and electric capacity the C10 parallel connections
Between end；The rc filter circuit includes resistance R9 and electric capacity C9, described to follow circuit to include amplifier U3B, the resistance R9
It is connected between the output end of the amplifier U3A and amplifier U3B positive input, described electric capacity C9 one end is connected to amplifier
U3B positive input, other end ground connection VSSA, the output end of the reverse input end of the amplifier U3B and the amplifier U3B connect
Connect, the output end connection CPU of amplifier U3B AD sampling channel ADIN0, and the output end of the amplifier U3B passes through two poles
Pipe D2 is connected to the ground VSSA.The chip model that isolation optocoupler U2 is used for ACPL-C87H, its power end VDD1 connections power supply+
VCC3, and VEE, power end VDD2 connection power supply+VCC3 are connected to by electric capacity C5, and be connected to by electric capacity C6
VSSA, VCC3 are 5V power supplys, and VSSA is the ground of 5V power supplys.
The course of work：
Amplifier U3A and amplifier U3B is only using including two inside dual operational amplifier chip LM358D, LM358D
Vertical, the compensation of high-gain, internal frequency dual operational amplifier, is suitable for the very wide single supply of supply voltage scope and uses,
Suitable for dual power supply mode of operation.
The PWM waveform that CPU is sent is 3.3V, is isolated using isolation optocoupler T1, isolation optocoupler T1 output end supply voltage
It is ± VCC2 for ± 12V.Using the Switching Power Supply of outside, power supply output is 15V, carries out voltage stabilizing to+12V by LM317, then lead to
Cross negative voltage and produce chip B1212D-W2 generation -12V voltages.Positive and negative PWM output circuits are designed using two triodes.Will
PWM ripples carry out electric resistance partial pressure and capacitance-resistance filter, then through overvoltage isolation optocoupler, are input to CPU AD sampling channels.
CPU I/O pin output CP1_PWM signals input as isolation optocoupler T1 CP1_PWM signals, CPU outputs
CP1_PWM signals pass through isolation optocoupler T1 isolation, export stable low and high level signal, and driving triode Q1 or Q2 are turned on,
The power supply of isolation optocoupler T1 primary sides side is powered using 3.3V power supply VCC1, and isolation optocoupler T1 secondary side VCC and GND are adopted respectively
Powered with+12V and -12V, then make isolation optocoupler T1 output ends when CPU I/O pin output CP1_PWM signals are low and high level
Corresponding output low and high level signal, triode Q1 and Q2 meet+12V and -12V power supplys respectively, so that triode Q1 conductings output+
12V pwm pulse signal, or make triode Q2 conducting outputs -12V pwm pulse signal, i.e. CP1 signals, CP1 signals connect
The CP interfaces of charging gun are connected to, CP interfaces are connected on automobile by charging gun, realize the confirmation of charging gun communication mechanism.Automobile
Upper to have switch, can controlling the resistance of connection over the ground, the colelctor electrode of triode has connected 1K resistance R1 and R12 for 1K etc.,
So the amplitude of CP1 signals is ± 6V or ± 9V.
Meanwhile the positive and negative PWM waveform of CP1 signals is changed into positive PWM by diode D1, then divide by resistance R5 and R11
Pressure, is changed into small voltage signal, then by resistance R7 and electric capacity C7 capacitance-resistance filter, into voltage isolation optocoupler U2, isolation optocoupler
U2 positive output end VOUT+ and inverse output terminal VOUT- connects difference amplifier U3A positive input and reversely input respectively
End, then pass through R9 and C9 capacitance-resistance filter and amplifier U3B voltage follower circuit again, enter CPU AD sampling channels,
The voltage signal of CPU collection inputs, when the amplitude of CP1 signal ends is ± 6V or ± 9V, CPU can gather out voltage signal
Change, so as to realize that power match and connection confirm, improve the stability of alternating-current charging pile.
The beneficial effects of the utility model are：A kind of electric automobile intelligent AC charging pile provided by the utility model, lead to
Cross light-coupled isolation and improve jamproof ability, the closed-loop control of CP1 signals is realized by CP signal feedback circuits, improves and fills
The precision of the stability of electric stake, reliability and PWM wave amplitudes.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is the theory diagram of the best embodiment of the utility model；
Fig. 2 is the schematic diagram of the best embodiment of the utility model；
Fig. 3 is the schematic diagram of isolation optocoupler and CP signal generating circuits in Fig. 2；
Fig. 4 is the schematic diagram of CP signal feedback circuits in Fig. 2.
Embodiment
The utility model is described in detail presently in connection with accompanying drawing.This figure is simplified schematic diagram, only in a schematic way
Illustrate basic structure of the present utility model, therefore it only shows the composition relevant with the utility model.
As shown in Figure 1-2, a kind of electric automobile intelligent AC charging pile, including control guidance circuit, the control guiding
Circuit includes CPU, isolation optocoupler, CP signal generating circuits, CP signal feedback circuits and charging gun interface, the I/O mouths of the CPU
It is connected with isolation optocoupler T1, the output end of the isolation optocoupler T1 is connected with the CP signal generating circuits, the CP signals production
Raw circuit output CP1 signals, the CP1 signals are divided into two-way, are connected all the way with the charging gun interface, another way is through CP signals
Feedback circuit is connected to CPU AD sampling channels.
As shown in figure 3, isolation optocoupler T1 uses ACPL-M50L-000E, for CPU outputs CP1_PWM pulses every
Primary side side anode from, isolation optocoupler T1 by resistance R3 connection 3.3V power supply VCC1, the power end VCC of secondary side is connected to+
VCC2 power supplys, ground terminal GND are connected to-VCC2 power supplys, and by the filtering of electric capacity C8 progress+VCC2 power supplys and-VCC2 power supplys,
VCC2 is 12V power supplys, and VEE is the ground of 12V power supplys, and VCC3 is 5V power supplys, and VSSA is the ground of 5V power supplys.The CP signals produce electricity
Road includes triode Q1 and Q2 and resistance R1, R4, R6 and R12, resistance R4 and the R6 series connection, the other end of the resistance R4
It is connected to base stage of power supply+VCC2, the resistance R6 other end respectively with the triode Q1 and Q2 to be connected, the resistance R4
It is connected with R6 public exit with the output end of the isolation optocoupler T1, the resistance R1 is serially connected in the collection of the triode Q1
Between electrode and power supply+VCC2, the resistance R12 is serially connected between colelctor electrode and the power supply-VCC2 of the triode Q2, described
Triode Q1 emitter stage is connected with triode Q2 emitter stage, and public exit output CP1 signals.
As shown in figure 4, the CP signal feedback circuits include pressure filter circuit, voltage isolation optocoupler circuit, difference fortune
Electric discharge road, rc filter circuit and follow circuit, the pressure filter circuit includes diode D1, resistance R5, R7 and R11 with
And electric capacity C7, the diode D1 anode connection CP1 signals, the negative electrode of the diode D1 are sequentially connected in series resistance R5 and R7,
The resistance R5 connects resistance R11 with R7 public exit and connects ground VEE, described electric capacity C7 one end and resistance R7 output
End connection, the other end are connected to the ground VEE；The voltage isolation optocoupler circuit includes isolation optocoupler U2, the isolation optocoupler U2's
Input VIN connection resistance R7 output end, the isolation optocoupler U2 include positive output end VOUT+ and inverse output terminal
VOUT-；The difference operational amplifying circuit includes amplifier U3A, resistance R2, R8, R10 and R13, electric capacity C4 and C10, the resistance R8 strings
It is associated between the positive input of the positive output end VOUT+ and amplifier U3A, the resistance R10 is connected on described reversely defeated
Between the reverse input end for going out to hold VOUT- and amplifier U3A, ground VSSA and amplifier are serially connected in after resistance R2 and electric capacity the C4 parallel connections
Between U3A positive input, amplifier U3A reverse input end and amplifier are serially connected in after resistance R13 and electric capacity the C10 parallel connections
Between U3A output end；The rc filter circuit includes resistance R9 and electric capacity C9, described to follow circuit to include amplifier U3B, institute
State resistance R9 to be connected between the output end of the amplifier U3A and amplifier U3B positive input, electric capacity C9 one end connection
It is defeated with the amplifier U3B's in amplifier U3B positive input, other end ground connection VSSA, the reverse input end of the amplifier U3B
Go out end connection, the output end connection CPU of amplifier U3B AD sampling channel ADIN0, and the output end warp of the amplifier U3B
Cross diode D2 and be connected to the ground VSSA.Isolation optocoupler U2 uses ACPL-C87H, its power end VDD1 connection power supply+VCC3, and
VEE, power end VDD2 connection power supply+VCC3 are connected to by electric capacity C5, and VSSA, VCC3 5V are connected to by electric capacity C6
Power supply, VSSA are the ground of 5V power supplys.
The course of work：
Amplifier U3A and amplifier U3B is only using including two inside dual operational amplifier chip LM358D, LM358D
Vertical, the compensation of high-gain, internal frequency dual operational amplifier, is suitable for the very wide single supply of supply voltage scope and uses,
Suitable for dual power supply mode of operation；Diode D1 uses MBRS3200T3G.
CPU I/O pin output CP1_PWM signals input as isolation optocoupler T1 CP1_PWM signals, CPU outputs
CP1_PWM signals pass through isolation optocoupler T1 isolation, export stable low and high level signal, and driving triode Q1 or Q2 are turned on,
The power supply of isolation optocoupler T1 primary sides side is powered using 3.3V power supply VCC1, and isolation optocoupler T1 secondary side VCC and GND are adopted respectively
Powered with+12V and -12V, then make isolation optocoupler T1 output ends when CPU I/O pin output CP1_PWM signals are low and high level
Corresponding output low and high level signal, triode Q1 and Q2 meet+12V and -12V power supplys respectively, so that triode Q1 conductings output+
12V pwm pulse signal, or make triode Q2 conducting outputs -12V pwm pulse signal, i.e. CP1 signals, CP1 signals connect
The CP interfaces of charging gun are connected to, CP interfaces are connected on automobile by charging gun, realize the confirmation of charging gun communication mechanism.Automobile
Upper to have switch, can controlling the resistance of connection over the ground, the colelctor electrode of triode has connected 1K resistance R1 and R12 for 1K etc.,
So the amplitude of CP1 signals is ± 6V or ± 9V.
Meanwhile the positive and negative PWM waveform of CP1 signals is changed into positive PWM by diode D1, then divide by resistance R5 and R11
Pressure, is changed into small voltage signal, then by resistance R7 and electric capacity C7 capacitance-resistance filter, into voltage isolation optocoupler U2, isolation optocoupler
U2 positive output end VOUT+ and inverse output terminal VOUT- connects difference amplifier U3A positive input and reversely input respectively
End, then pass through R9 and C9 capacitance-resistance filter and amplifier U3B voltage follower circuit again, enter CPU AD sampling channels,
The voltage signal of CPU collection inputs, when the amplitude of CP1 signal ends is ± 6V or ± 9V, CPU can gather out voltage signal
Change, so as to realize that power match and connection confirm, improve the stability of alternating-current charging pile.
Also include -12V power circuits in the present embodiment, using power supply chip B1212D-W2, by+12V Power converts for -
12V power supplys export, and it by+12V Power converts is isolation optocoupler T1 and isolation optocoupler U2 for+5V power supplys to use power supply chip L78L05
Working power is provided.
Using it is above-mentioned according to desirable embodiment of the present utility model as enlightenment, by above-mentioned description, related work
Personnel can carry out various changes and amendments in without departing from the scope of the utility model completely.This item utility model
Technical scope is not limited to the content on specification, it is necessary to determines its technical scope according to right.
Claims (3)
- A kind of 1. electric automobile intelligent AC charging pile, it is characterised in that：Including controlling guidance circuit, the control guidance circuit Including CPU, isolation optocoupler, CP signal generating circuits, CP signal feedback circuits and charging gun interface, the I/O mouths of the CPU with every From optocoupler T1 connections, the output end of the isolation optocoupler T1 is connected with the CP signal generating circuits, and the CP signals produce electricity Road exports CP1 signals, and the CP1 signals are divided into two-way, are connected all the way with the charging gun interface, and another way is fed back through CP signals Circuit is connected to CPU AD sampling channels.
- 2. electric automobile intelligent AC charging pile as claimed in claim 1, it is characterised in that：The CP signal generating circuits bag Include triode Q1 and Q2 and resistance R1, R4, R6 and R12, resistance R4 and the R6 series connection, the other end connection of the resistance R4 To power supply+VCC2, the base stage of the other end of the resistance R6 respectively with the triode Q1 and Q2 is connected, the resistance R4 and R6 Public exit be connected with the output end of the isolation optocoupler T1, the resistance R1 is serially connected in the colelctor electrode of the triode Q1 Between power supply+VCC2, the resistance R12 is serially connected between colelctor electrode and the power supply-VCC2 of the triode Q2, three pole Pipe Q1 emitter stage is connected with triode Q2 emitter stage, and public exit output CP1 signals.
- 3. electric automobile intelligent AC charging pile as claimed in claim 1 or 2, it is characterised in that：The CP signals feedback electricity Road includes pressure filter circuit, voltage isolation optocoupler circuit, difference operational amplifying circuit, rc filter circuit and follows circuit, institute Stating pressure filter circuit includes diode D1, resistance R5, R7 and R11 and electric capacity C7, the diode D1 anode connection CP1 Signal, the negative electrode of the diode D1 are sequentially connected in series resistance R5 and R7, and the resistance R5 connects resistance with R7 public exit R11 simultaneously connects ground VEE, and described electric capacity C7 one end is connected with resistance R7 output end, and the other end is connected to the ground VEE；The voltage The input VIN connection resistance R7 of isolation optocoupler circuit including isolation optocoupler U2, isolation optocoupler U2 output end, it is described every Include positive output end VOUT+ and inverse output terminal VOUT- from optocoupler U2；The difference operational amplifying circuit includes amplifier U3A, resistance R2, R8, R10 and R13, electric capacity C4 and C10, the resistance R8 are connected on the positive output end VOUT+ and amplifier U3A forward direction Between input, the resistance R10 is connected between the reverse input end of the inverse output terminal VOUT- and amplifier U3A, described It is serially connected in after resistance R2 and electric capacity C4 parallel connections between ground VSSA and amplifier U3A positive input, the resistance R13 and electric capacity It is serially connected in after C10 parallel connections between amplifier U3A reverse input end and amplifier U3A output end；The rc filter circuit includes Resistance R9 and electric capacity C9, it is described to follow circuit to include amplifier U3B, the resistance R9 be connected on the output end of the amplifier U3A with Between amplifier U3B positive input, described electric capacity C9 one end is connected to amplifier U3B positive input, other end ground connection VSSA, the reverse input end of the amplifier U3B are connected with the output end of the amplifier U3B, the output end connection of the amplifier U3B CPU AD sampling channel ADIN0, and the output end of the amplifier U3B is connected to the ground VSSA by diode D2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720277263.6U CN206718998U (en) | 2017-03-21 | 2017-03-21 | Electric automobile intelligent AC charging pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720277263.6U CN206718998U (en) | 2017-03-21 | 2017-03-21 | Electric automobile intelligent AC charging pile |
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| Publication Number | Publication Date |
|---|---|
| CN206718998U true CN206718998U (en) | 2017-12-08 |
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ID=60502304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201720277263.6U Active CN206718998U (en) | 2017-03-21 | 2017-03-21 | Electric automobile intelligent AC charging pile |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108437818A (en) * | 2018-02-27 | 2018-08-24 | 北京新能源汽车股份有限公司 | A kind of charging pile control system |
| CN110228393A (en) * | 2019-05-22 | 2019-09-13 | 重庆国翰能源发展有限公司 | A kind of alternating-current charging pile control system |
| CN110539661A (en) * | 2019-09-18 | 2019-12-06 | 江苏华鹏智能仪表科技股份有限公司 | Alternating current charging equipment CP control guide signal driving and collecting circuit |
| CN117261674A (en) * | 2023-11-22 | 2023-12-22 | 张家港友诚新能源科技股份有限公司 | CP signal generation and feedback circuit of electric automobile charging pile |
-
2017
- 2017-03-21 CN CN201720277263.6U patent/CN206718998U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108437818A (en) * | 2018-02-27 | 2018-08-24 | 北京新能源汽车股份有限公司 | A kind of charging pile control system |
| CN110228393A (en) * | 2019-05-22 | 2019-09-13 | 重庆国翰能源发展有限公司 | A kind of alternating-current charging pile control system |
| CN110539661A (en) * | 2019-09-18 | 2019-12-06 | 江苏华鹏智能仪表科技股份有限公司 | Alternating current charging equipment CP control guide signal driving and collecting circuit |
| CN117261674A (en) * | 2023-11-22 | 2023-12-22 | 张家港友诚新能源科技股份有限公司 | CP signal generation and feedback circuit of electric automobile charging pile |
| CN117261674B (en) * | 2023-11-22 | 2024-02-23 | 张家港友诚新能源科技股份有限公司 | CP signal generation and feedback circuit of electric automobile charging pile |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Room 139, No.18, Xinya Road, Wujin national high tech Industrial Development Zone, Changzhou City, Jiangsu Province 213000 Patentee after: Wanbang star Charging Technology Co.,Ltd. Address before: Room 139, No.18, Xinya Road, Wujin national high tech Industrial Development Zone, Changzhou City, Jiangsu Province 213000 Patentee before: WANBANG CHARGING EQUIPMENT Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |