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CN107139743B - Charging machine - Google Patents

Charging machine Download PDF

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Publication number
CN107139743B
CN107139743B CN201710267526.XA CN201710267526A CN107139743B CN 107139743 B CN107139743 B CN 107139743B CN 201710267526 A CN201710267526 A CN 201710267526A CN 107139743 B CN107139743 B CN 107139743B
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China
Prior art keywords
resistance
capacitor
voltage
voltage value
connect
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Application number
CN201710267526.XA
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Chinese (zh)
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CN107139743A (en
Inventor
黎志维
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Guangzhou Shiyuan Electronics Thecnology Co Ltd
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Guangzhou Shiyuan Electronics Thecnology Co Ltd
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Priority to CN201710267526.XA priority Critical patent/CN107139743B/en
Publication of CN107139743A publication Critical patent/CN107139743A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION 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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION 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
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • 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
    • 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
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • 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

The invention discloses a charger, which comprises a single chip microcomputer, a voltage output module, a relay, an output voltage detection module and a battery voltage detection module, wherein the single chip microcomputer is connected with the voltage output module; the first end of the relay is respectively connected with the voltage output module and the output voltage detection module, and the second end of the relay is respectively connected with the battery voltage detection module and the battery; the voltage output module, the output voltage detection module, the relay and the battery voltage detection module are all connected with the single chip microcomputer; the output voltage detection module is used for detecting the voltage value of the first end; the battery voltage detection module is used for detecting the voltage value of the second end; the single chip microcomputer is used for adjusting the voltage value output by the voltage output module by adjusting the square wave duty ratio of the single chip microcomputer when the voltage value of the first end is different from the voltage value of the second end, so that the voltage value of the first end is the same as the voltage value of the second end. The charger has higher reliability.

Description

Charger
Technical field
The present invention relates to battery charging equipment technical fields, more particularly to a kind of charger.
Background technique
As the cry of variation and the energy-saving and emission-reduction of human environment is higher and higher, the exploitation of green energy resource is at today's society Development topic, new-energy automobile, such as electric car, as cleaning, low-carbon type Green Vehicle, very big pass by countries in the world Note.
Rechargeable battery is the important component of electric car, directly affects the performance of vehicle and the driving experience of user. The charging of rechargeable battery mainly uses charger to realize at present, after charger accesses alternating current, is rectified to electric current, output processing Afterwards, it to corresponding rechargeable battery powered, needs that relay is used to fill as switch when output relay is closed in charger Motor starts to charge the battery.Since output relay is in action process, the phenomenon that being easy to appear sparking, arcing, existing skill Art need to add diode and resistance composition pre-charge circuit, it is used in parallel with relay, with prevent sparking, arcing go out It is existing, but diode and resistance are used, the cost on hardware is on the one hand increased, another aspect diode and resistance are easy to appear event Barrier, reliability is not high, once diode or resistance break down, the contact at relay both ends will have voltage difference, so that after Electric appliance is easy to produce sparking phenomenon of arc discharge in closure.
Summary of the invention
For this purpose, the embodiment of the present invention proposes a kind of higher charger of reliability, prevent relay generation in charger from beating Fiery phenomenon of arc discharge.
Charger according to an embodiment of the invention, including the inspection of single-chip microcontroller, voltage output module, relay, output voltage Survey module and battery voltage sensing module；
The first end of the relay is connect with the voltage output module and the output voltage detection module respectively, institute The second end for stating relay is connect with the battery voltage sensing module and battery respectively；
The voltage output module, the output voltage detection module, the relay and the battery voltage detection mould Block is connect with the single-chip microcontroller；
The output voltage detection module is used to detect the voltage value of the first end, and the first end that will test Voltage value be sent to the single-chip microcontroller；
The battery voltage sensing module is used to detect the voltage value of the second end, and the second end that will test Voltage value be sent to the single-chip microcontroller；
The single-chip microcontroller is used for the voltage value of the first end and the voltage value of the second end, and described first It is described to adjust by adjusting the duty cycle square wave of the single-chip microcontroller when voltage value difference of the voltage value at end and the second end The voltage value of voltage output module output, so that the voltage value of the first end is identical with the voltage value of the second end.
Charger according to an embodiment of the present invention passes through monolithic without using the diode and resistance in parallel with relay Machine compares the voltage difference at output relay both ends, when the voltage value difference of the voltage value of the first end and the second end, The voltage value of voltage output module output is adjusted by adjusting duty cycle square wave so that the voltage value of the first end and The voltage value of the second end is identical, subsequent to generate the scene of sparking, arcing again when reclosing relay, compared to existing There is technology, the protection precision and reliability of the charger are higher, and reduce the cost on hardware.
In addition, charger according to the above embodiment of the present invention, can also have the following additional technical features:
Further, in one embodiment of the invention, the battery voltage sensing module includes concatenated first electricity Resistance, second resistance and 3rd resistor, the 3rd resistor ground connection, the tie point access of the second resistance and the 3rd resistor In the single-chip microcontroller, the battery voltage sensing module further includes in parallel first diode and the second diode, and described first The cathode of the cathode of diode and second diode connects with the tie point of the first resistor and the second resistance respectively It connects, the anode of the anode of the first diode and second diode is grounded.
Further, in one embodiment of the invention, the output voltage detection module include first comparator, with And concatenated 4th resistance, the 5th resistance, the 6th resistance, described in the 5th resistance is connected with the tie point of the 6th resistance The anode of first comparator, the anode of the first comparator are also connected with the first end of the 7th resistance, the first comparator Cathode passes through the 8th resistance eutral grounding.
Further, in one embodiment of the invention, the voltage output module includes RC filter circuit and compares One end of circuit, the RC filter circuit is connect with the single-chip microcontroller, and the other end is connect with the comparison circuit, and the comparison is electric Road is also connect with the second end of the 7th resistance, and through the RC filter circuit, that treated is defeated for comparing for the comparison circuit The voltage value of the voltage value of voltage and output voltage detection module feedback out, and according to after RC filter circuit processing Output voltage voltage value control signal corresponding with the height output of voltage value that the output voltage detection module is fed back.
Further, in one embodiment of the invention, the RC filter circuit includes concatenated 9th resistance, the tenth Resistance and eleventh resistor, the RC filter circuit further include first capacitor, the second capacitor and third capacitor, the first capacitor First end be connected between the 9th resistance and the tenth resistance, the first end of second capacitor is connected to described Between ten resistance and the eleventh resistor, the first end of the third capacitor is connect with the eleventh resistor, and described first The second end of the second end of capacitor, the second end of second capacitor and the third capacitor is grounded.
Further, in one embodiment of the invention, the comparison circuit include the second comparator, the 4th capacitor, The anode of 5th capacitor, twelfth resistor and the 6th capacitor, second comparator is connect with the RC filter circuit, and described the The cathode of two comparators is connect with the second end of the 7th resistance, and second comparator is in parallel with the 4th capacitor, institute The 5th capacitor and twelfth resistor series connection are stated, and the 5th capacitor and the twelfth resistor are electric with the described 4th together Hold parallel connection, the both ends of the 6th capacitor are connect with second comparator respectively.
Further, in one embodiment of the invention, the voltage output module further includes thirteenth resistor, third Diode and the 4th diode, the third diode and the 4th diodes in parallel, one end of the thirteenth resistor with The comparison circuit connection, the other end are connect with the cathode of the third diode.
Further, in one embodiment of the invention, control electricity is equipped between the relay and the single-chip microcontroller Road, the control circuit include the 14th resistance and triode, and one end of the 14th resistance is connect with the single-chip microcontroller, separately One end is connect with the base stage of the triode, the emitter of triode ground connection, the emitter of the triode and described the The 15th resistance is equipped between 14 resistance, the collector of the triode is connect with the relay, and the control circuit is also Including concatenated 16th resistance and the 7th capacitor and concatenated 17th resistance and the 8th capacitor, the 16th resistance It is connect with the relay with the 17th resistance, it is between the 16th resistance and the 7th capacitor and described Extraneous power supply is accessed between 17th resistance and the 8th capacitor.
Further, the single-chip microcontroller is also used to the voltage value of second end described in comparison and the range of preset voltage value, and The charged state of the battery is judged according to comparison result；
When the voltage value for the second end that the single-chip microcontroller receives is 0, the single-chip microcontroller judges the battery not Access or the battery are reversed.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description Obviously, or embodiment through the invention is recognized.
Detailed description of the invention
The above-mentioned and/or additional aspect and advantage of the embodiment of the present invention are from the description of the embodiment in conjunction with the following figures It will be apparent and be readily appreciated that, in which:
Fig. 1 is the structural block diagram of charger according to an embodiment of the invention；
Fig. 2 is the flow chart of relay protection method in charger according to an embodiment of the invention；
Fig. 3 is the circuit diagram of battery voltage sensing module and control circuit in Fig. 1；
Fig. 4 is the circuit diagram of output voltage detection module in Fig. 1；
Fig. 5 is the circuit diagram of voltage output module in Fig. 1.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to Fig. 1, the charger that one embodiment of the invention proposes only has shown and has implemented with the present invention for ease of description The relevant part of example, which includes single-chip microcontroller 10, voltage output module 20, relay 30, output voltage detection module 40 With battery voltage sensing module 50.
The first end of the relay 30 respectively with the voltage output module 20 and the output voltage detection module 40 Connection, the second end of the relay 30 are connect with the battery voltage sensing module 50 and battery 60 respectively.Wherein, the electricity Pond 60 is rechargeable battery, utilizes the rechargeable battery in electric car.
The voltage output module 20, the output voltage detection module 40, the relay 30 and the cell voltage Detection module 50 is connect with the single-chip microcontroller 10.It should be understood that in practical applications, the voltage output module 20 needs Access alternating current.
The output voltage detection module 40 is used to detect the voltage value of the first end of the relay 30, and will test The voltage value of first end of the relay 30 be sent to the single-chip microcontroller 10.
The battery voltage sensing module 50 is used to detect the voltage value of the second end of the relay 30, and will test The voltage value of second end of the relay 30 be sent to the single-chip microcontroller 10.
The single-chip microcontroller 10 be used for compare 30 first end of relay 30 second end of voltage value and the relay Voltage value lead to and in the voltage value difference of the voltage value of 30 first end of relay and 30 second end of relay The adjustment duty cycle square wave of the single-chip microcontroller 10 is crossed to adjust the voltage value that the voltage output module 20 exports so that it is described after The voltage value of 30 first end of electric appliance is identical with the voltage value of 30 second end of relay.
Referring to Fig. 2, the charger realizes that the step of relay protection specifically includes that
S101, output voltage detection module 40 detect the voltage value of the first end of relay 30, and will test result transmission To single-chip microcontroller 10；
S102, battery voltage sensing module 50 detect the voltage value of the second end of relay 30, and will test result transmission To single-chip microcontroller 10；
S103, single-chip microcontroller 10 judge that the voltage value of the voltage value of the first end of relay 30 and the second end of relay 30 is It is no identical；
S104, if it is not, then single-chip microcontroller 10 adjusts the voltage value that voltage output module 20 exports, so that 30 first end of relay Voltage value it is identical with the voltage value of 30 second end of relay.
Pass through single-chip microcontroller ratio without using the diode and resistance in parallel with relay according to the charger of the present embodiment Pass through compared with the voltage difference at output relay both ends when the voltage value difference of the voltage value of the first end and the second end Adjustment duty cycle square wave is to adjust the voltage value of voltage output module output, so that the voltage value of the first end and described The voltage value of second end is identical, subsequent to generate the scene of sparking, arcing again when reclosing relay, compares existing skill Art, the protection precision and reliability of the charger are higher, and reduce the cost on hardware.In addition, being proposed according to the present embodiment Charger, output voltage detection module and battery voltage sensing module can detect respectively relay first end voltage value and The voltage value of second end, when the pressure difference of two voltage values occurs obvious abnormal, relay breaks down at this time on surface, therefore should Charger can also detect whether relay sends failure, further promote the reliability and safety of product.
In addition, the single-chip microcontroller 10 is also used to the model of the voltage value and preset voltage value of 30 second end of relay described in comparison It encloses, and judges the charged state of the battery 60 according to comparison result.The range of the preset voltage value can be according to battery 60 Voltage rating determines, for example, the voltage rating for the battery to be charged is 5V, and the range of preset voltage value can be set to 5 ± 0.1V shows battery wrong at this time, needs when the voltage value for stating 30 second end of relay that single-chip microcontroller 10 receives is 10V Correct battery is replaced to charge.
In addition, when the voltage value for 30 second end of the relay that the single-chip microcontroller 10 receives is 0, the single-chip microcontroller 10 judge that the battery 60 does not access or the battery 60 is reversed, to detect whether the charged state of battery 60 has exception.
Referring to Fig. 3, the battery voltage sensing module 50 includes concatenated first resistor as a specific example R1, second resistance R2 and 3rd resistor R3, the 3rd resistor R3 ground connection, the second resistance R2 and the 3rd resistor R3's Tie point accesses in the single-chip microcontroller 10, and the battery voltage sensing module 50 further includes first diode D1 and second in parallel The cathode of diode D2, the cathode of the first diode D1 and the second diode D2 respectively with the first resistor R1 and The tie point of the second resistance R2 connects, and the anode of the anode of the first diode D1 and the second diode D2 connect Ground.Specifically, battery voltage sensing module 50 is connect with two connecting terminals CN601 and CN602 of battery 60, cell voltage Batt+After first resistor R1, second resistance R2 and 3rd resistor R3 partial pressure, generates Batt_cpu signal and be sent to single-chip microcontroller 10 AD detection mouth, corresponding detection relationship are as follows:
Referring to Fig. 4, as a specific example, the output voltage detection module 40 include first comparator U1, with And concatenated 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the connection of the 5th resistance R5 and the 6th resistance R6 Point connects the anode of the first comparator U1, and the anode of the first comparator U1 is also connected with the first end of the 7th resistance R7, The cathode of the first comparator U1 is grounded by the 8th resistance R8.Specifically, output voltage Vout +By the 4th resistance R4, After five resistance R5, the 6th resistance R6 partial pressure, two signal V are generatedfdbAnd Vout_cpu, wherein VfdbIt is the feedback of voltage loop, Vout_cpuIt send to the AD detection mouth of single-chip microcontroller 10, the detection relationship of output voltage meets following formula:
Referring to Fig. 5, the voltage output module 20 includes RC filter circuit 201 and compares as a specific example Circuit 202, one end of the RC filter circuit 201 are connect with the single-chip microcontroller 10, and the other end and the comparison circuit 202 connect It connects, the comparison circuit 202 is also connect with the second end of the 7th resistance R7, and the comparison circuit 202 is for comparing through institute State RC filter circuit 201 treated the voltage value V of output voltagerefWith the voltage of the output voltage detection module 40 feedback Value Vfdb, and according to the voltage value V through the RC filter circuit 201 treated output voltagerefIt is detected with the output voltage The voltage value V that module 40 is fed backfdbThe corresponding control signal of height output.Specifically, the PWM mouth of the single-chip microcontroller 10 exports PWMV0 square wave (duty ratio is adjustable), adjustable output voltage values, for example, the square wave of duty ratio 50% corresponds to output voltage For 50V；It is 60V that the square wave of duty ratio 60%, which corresponds to output voltage,.
The RC filter circuit 201 is for filtering PWM square wave to obtain voltage Vref, the comparison circuit 202 is to VrefWith VfdbIt makes comparisons, then obtains control signal FB, the output of FB signal control power supply chip.
Work as VfdbCompare VrefGao Shi, the comparison circuit 202 draw low control signal FB；
Work as VfdbCompare VrefWhen low, the comparison circuit 202 draws high control signal FB；
By above-mentioned control, it can guarantee that the voltage value of 30 first end of relay and the single-chip microcontroller 10 are adjusted Output voltage values are consistent.
Specifically, the RC filter circuit 201 includes concatenated 9th resistance R9, the tenth resistance R10 and eleventh resistor R11, the RC filter circuit 201 further include first capacitor C1, the second capacitor C2 and third capacitor C3, the first capacitor C1's First end is connected between the 9th resistance R9 and the tenth resistance R10, and the first end of the second capacitor C2 is connected to Between the tenth resistance R10 and the eleventh resistor R11, the first end and the eleventh resistor of the third capacitor C3 R11 connection, the second end of the second end of the first capacitor C1, the second end of the second capacitor C2 and the third capacitor C3 It is grounded.
The comparison circuit 202 include the second comparator U2, the 4th capacitor C4, the 5th capacitor C5, twelfth resistor R12 and The anode of 6th capacitor C6, the second comparator U2 are connect with the RC filter circuit 201, and the second comparator U2's is negative Pole is connect with the second end of the 7th resistance R7, and the second comparator U2 is in parallel with the 4th capacitor C4, and the described 5th Capacitor C5 and twelfth resistor R12 series connection, and the 5th capacitor C5 and the twelfth resistor R12 are together with described the Four capacitor C4 are in parallel, and the both ends of the 6th capacitor C6 are connect with the second comparator U2 respectively.
In addition, the voltage output module 20 further includes thirteenth resistor R13, third diode D3 and the 4th diode D4, the third diode D3 and the 4th diode D4 are in parallel, and one end of the thirteenth resistor R13 is electric compared with described Road 202 connects, and the other end is connect with the cathode of the third diode D3.
Please continue to refer to Fig. 3, as a specific example, control is equipped between the relay 30 and the single-chip microcontroller 10 Circuit 70, the control circuit 70 include the 14th resistance R14 and triode Q1, one end of the 14th resistance R14 and institute State the connection of single-chip microcontroller 10, specially receive the REALY1 signal of the single-chip microcontroller 10, the other end of the 14th resistance R14 with The base stage of the triode Q1 connects, the emitter ground connection of the triode Q1, the emitter of the triode Q2 and described the The 15th resistance R15 is equipped between 14 resistance R14, the collector of the triode Q1 is connect with the relay 30, described Control circuit 70 further includes concatenated 16th resistance R16 and the 7th capacitor C7 and concatenated 17th resistance R17 and the 8th Capacitor C8, the 16th resistance R16 and the 17th resistance R17 are connect with the relay 30, the 16th electricity It hinders between R16 and the 7th capacitor C7 and access is extraneous between the 17th resistance R17 and the 8th capacitor C8 Power supply specially accesses the VDD of 12V.When the REALY1 signal of the single-chip microcontroller 10 is drawn high, the triode Q1 conducting, 12V VDD make the A of relay 30, B contact closure.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for Instruction execution system, device or equipment (such as computer based system, including the system of processor or other can be held from instruction The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set It is standby and use.For the purpose of this specification, " computer-readable medium ", which can be, any may include, stores, communicates, propagates or pass Defeated program is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment It sets.
The more specific example (non-exhaustive list) of computer-readable medium include the following: there are one or more wirings Electrical connection section (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory (ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware Any one of column technology or their combination are realized: having a logic gates for realizing logic function to data-signal Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene Programmable gate array (FPGA) etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any One or more embodiment or examples in can be combined in any suitable manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this The range of invention is defined by the claims and their equivalents.

Claims (7)

1. a kind of charger, which is characterized in that including single-chip microcontroller, voltage output module, relay, output voltage detection module and Battery voltage sensing module；
The first end of the relay is connect with the voltage output module and the output voltage detection module respectively, it is described after The second end of electric appliance is connect with the battery voltage sensing module and battery respectively；
The voltage output module, the output voltage detection module, the relay and the battery voltage sensing module are equal It is connect with the single-chip microcontroller；
The output voltage detection module is used to detect the voltage value of the first end, and the electricity for the first end that will test Pressure value is sent to the single-chip microcontroller；
The battery voltage sensing module is used to detect the voltage value of the second end, and the electricity for the second end that will test Pressure value is sent to the single-chip microcontroller；
The single-chip microcontroller is used for the voltage value of the first end and the voltage value of the second end, and in the first end When the voltage value difference of voltage value and the second end, by adjusting the duty cycle square wave of the single-chip microcontroller to adjust the voltage The voltage value of output module output, so that the voltage value of the first end is identical with the voltage value of the second end；
Wherein, the voltage output module includes RC filter circuit and comparison circuit, one end of the RC filter circuit with it is described Single-chip microcontroller connection, the other end are connect with the comparison circuit, and the comparison circuit is also connect with the second end of the 7th resistance, described Comparison circuit is used to compare voltage value through the RC filter circuit treated output voltage and the output voltage detects mould The voltage value of block feedback, and according to through the RC filter circuit treated output voltage voltage value and the output voltage examine The corresponding control signal of height output of the voltage value of module feedback is surveyed, the comparison circuit includes the second comparator, the 4th electricity The anode of appearance, the 5th capacitor, twelfth resistor and the 6th capacitor, second comparator is connect with the RC filter circuit, institute The cathode for stating the second comparator is connect with the second end of the 7th resistance, and second comparator and the 4th capacitor are simultaneously Connection, the 5th capacitor and the twelfth resistor series connection, and the 5th capacitor and the twelfth resistor together with it is described 4th capacitor is in parallel, and the both ends of the 6th capacitor are connect with second comparator respectively.
2. charger according to claim 1, which is characterized in that the battery voltage sensing module includes concatenated first The tie point of resistance, second resistance and 3rd resistor, the 3rd resistor ground connection, the second resistance and the 3rd resistor connects Entering in the single-chip microcontroller, the battery voltage sensing module further includes in parallel first diode and the second diode, and described the The cathode of the cathode of one diode and second diode tie point with the first resistor and the second resistance respectively The anode of connection, the anode of the first diode and second diode is grounded.
3. charger according to claim 2, which is characterized in that the output voltage detection module compares including first The tie point of device and concatenated 4th resistance, the 5th resistance, the 6th resistance, the 5th resistance and the 6th resistance connects The anode of the first comparator is connect, the anode of the first comparator is also connected with the first end of the 7th resistance, first ratio Cathode compared with device passes through the 8th resistance eutral grounding.
4. charger according to claim 3, which is characterized in that the RC filter circuit include concatenated 9th resistance, Tenth resistance and eleventh resistor, the RC filter circuit further include first capacitor, the second capacitor and third capacitor, and described first The first end of capacitor is connected between the 9th resistance and the tenth resistance, and the first end of second capacitor is connected to institute It states between the tenth resistance and the eleventh resistor, the first end of the third capacitor is connect with the eleventh resistor, described The second end of the second end of first capacitor, the second end of second capacitor and the third capacitor is grounded.
5. charger according to claim 4, which is characterized in that the voltage output module further include thirteenth resistor, Third diode and the 4th diode, the third diode and the 4th diodes in parallel, the one of the thirteenth resistor End is connect with the comparison circuit, and the other end is connect with the cathode of the third diode.
6. according to claim 1 to charger described in 5 any one, which is characterized in that the relay and the single-chip microcontroller Between be equipped with control circuit, the control circuit includes the 14th resistance and triode, one end of the 14th resistance and institute Single-chip microcontroller connection is stated, the other end is connect with the base stage of the triode, the emitter ground connection of the triode, the triode The 15th resistance is equipped between emitter and the 14th resistance, the collector of the triode is connect with the relay, The control circuit further includes concatenated 16th resistance and the 7th capacitor and concatenated 17th resistance and the 8th capacitor, 16th resistance and the 17th resistance are connect with the relay, the 16th resistance and the 7th capacitor Between and the 17th resistance and the 8th capacitor between access extraneous power supply.
7. charger according to claim 1, which is characterized in that the single-chip microcontroller is also used to the electricity of second end described in comparison The range of pressure value and preset voltage value, and judge according to comparison result the charged state of the battery；
When the voltage value for the second end that the single-chip microcontroller receives is 0, the single-chip microcontroller judges that the battery does not access Or the battery is reversed.
CN201710267526.XA 2017-04-21 2017-04-21 Charging machine Active CN107139743B (en)

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Publication number Priority date Publication date Assignee Title
US5923150A (en) * 1996-03-29 1999-07-13 Sony Corporation Charging apparatus
JP3918552B2 (en) * 2001-12-26 2007-05-23 アイシン・エィ・ダブリュ株式会社 Electric vehicle drive control device, electric vehicle drive control method, and program thereof
CN103199503B (en) * 2013-03-29 2015-01-28 奇瑞汽车股份有限公司 Protective circuit of vehicle-mounted charger
CN103457323B (en) * 2013-09-02 2015-09-16 四川川奇机电有限责任公司 Charging circuit and the charger with this charging circuit
CN105730265B (en) * 2016-01-21 2019-02-05 易事特集团股份有限公司 Charging starting device of direct current charging pile of electric automobile

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