CN108879911B - Downhill charging circuit and charging method for electric vehicle - Google Patents
Downhill charging circuit and charging method for electric vehicle Download PDFInfo
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- CN108879911B CN108879911B CN201810914375.7A CN201810914375A CN108879911B CN 108879911 B CN108879911 B CN 108879911B CN 201810914375 A CN201810914375 A CN 201810914375A CN 108879911 B CN108879911 B CN 108879911B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
- H02J7/1469—Regulation of the charging current or voltage otherwise than by variation of field
- H02J7/1492—Regulation of the charging current or voltage otherwise than by variation of field by means of controlling devices between the generator output and the battery
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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
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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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
Abstract
The invention discloses a downhill charging circuit of an electric vehicle, which comprises a speed measurement comparison circuit, a boosting charging circuit and a voltage reduction charging circuit; when the electric vehicle runs on a downhill, the downhill charging switch is turned on, the speed measurement comparison circuit adopts a boost charging mode after detecting that the speed of the electric vehicle is lower than a preset speed, and adopts a buck charging mode if detecting that the speed of the electric vehicle is higher than the preset speed. The invention can supplement the energy of the storage battery in time, greatly prolong the service life of the storage battery and increase the driving range. Meanwhile, a strong braking force can be generated during charging, the abrasion of a brake pad can be reduced, the vehicle speed is automatically reduced, and the driving is safer.
Description
Technical Field
The invention relates to the electric vehicle charging technology, in particular to a downhill charging circuit of an electric vehicle.
Background
The electric vehicle can generate about 20W-40W of electric energy when running downhill, and is unfortunately wasted if not used. In order to change the motor into a generator, the generated voltage needs to be higher than the battery voltage, so that the generated electric energy can be recharged into the storage battery through the freewheeling diode, but the problem is that the running speed of the electric vehicle is more than 25km/h, the speed is very high, the running danger is increased, the electric vehicle can reach a high-speed road section, and the electric vehicle has little significance if being charged simply. When the electric automobile runs downhill at the safe speed of 5-20 km/h, the voltage generated by the motor is smaller than the voltage of the battery, and the electric energy cannot be recharged into the storage battery.
Disclosure of Invention
In view of the above problems in the prior art, the present invention provides a downhill charging circuit for an electric vehicle, which is capable of charging the electric vehicle when the electric vehicle is caused to descend.
In order to achieve the purpose, the invention adopts the following technical scheme:
a downhill charging circuit of an electric vehicle comprises a speed measurement comparison circuit, a boost charging circuit and a buck charging circuit; when the electric vehicle runs on a downhill, the downhill charging switch is turned on, the speed measurement comparison circuit adopts a boost charging mode after detecting that the speed of the electric vehicle is lower than a preset speed, and adopts a buck charging mode if detecting that the speed of the electric vehicle is higher than the preset speed.
Further, the preset speed is 20 km/h.
Further, the speed measurement comparison circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a potentiometer RP1, a potentiometer RP2, a diode D1, a diode D2, a triode BG1, a triode BG2, an integrated circuit IC1, a relay J1, a speed measurement sensor R and a switch S1; wherein, the resistor R1 is connected between the positive pole of the battery E1 and the collector of the transistor BG1, the resistor R2 is connected between the emitter of the transistor BG1 and the ground, the resistor R3 is connected between the collector of the transistor BG1 and the ground, the resistor R4 is connected between the 2 pin of the integrated circuit IC1 and the ground, the resistor R5 is connected between the base of the transistor BG2 and the negative pole of the diode D1, the resistor R6 is connected between the emitter of the transistor BG2 and the ground, the potentiometer RP1 is connected between the positive pole of the battery E1 and the base of the transistor BG1, the potentiometer RP1 is connected between the positive pole of the battery E1 and the 2 pin of the integrated circuit IC1, the positive pole of the diode D1 is connected with the 1 pin of the integrated circuit IC1, the negative pole is connected with the resistor R1, the base of the transistor BG1 is connected between the base of the transistor BG1 and the ground, the connection point of the collector of the transistor BG1 is connected with the resistor R1 and the, the base electrode of the triode BG2 is connected with the resistor R5, the collector electrode is connected with the relay J1, the emitter electrode is connected with the resistor R6, the 1 pin of the integrated circuit IC1 is connected with the anode of the diode D1, the 2 pin is connected with the connection point of the potentiometer RP2 and the resistor R4, the 3 pin is connected with the collector electrode of the triode BG1, the 4 pin is grounded, the 8 pin is connected with the anode of the battery E1, the relay J1 is connected with the diode D2 in parallel and then connected between the fixed end of the switch S1 and the collector electrode of the triode BG2, the '1' end of the switch S1 is suspended, and the '2' end is.
Further, the integrated circuit IC1 is LM358 chip; the types of the diode D1, the diode D2 and the diode D4 are all IN 4007; the triode BG1 is an NPN type triode with the model number of 9014; the triode BG2 is an NPN type triode with the model of ZTX 300; the switches S1-S2 are linked wave band switches with two groups of contacts; the model of the speed measurement sensor R is SCA 1000-D01.
Further, the boost charging circuit comprises a resistor R7, a resistor R8, a capacitor C1, a capacitor C2, a capacitor C3, a diode D3, a diode D4, a triode BG3, a triode BG4, a rectifier stack UR, a transformer B, a normally closed contact J1-2 of a relay J1 and a fuse FU; the resistor R7 is connected between pin 2 of an input coil B1-1 of the transformer B and pin 2 of an input coil B1-2 of the transformer B, the resistor R8 is connected between pin 3 and pin 4 of the rectifier stack UR, the positive electrode of the capacitor C1 is connected with pin 2 of an input coil B1-1 of the transformer B, the negative electrode is grounded, the capacitor C2 is connected between pin 1 and pin 3 of an input coil B1-1 of the transformer B, the positive electrode of the capacitor C3 is connected with pin 3 of the rectifier stack UR, the negative electrode is connected with pin 4 of the rectifier stack UR, the positive electrode of the diode D3 is connected with the emitter of the triode BG3, the negative electrode is connected with pin 2 of the input coil B1-1 of the transformer B, the positive electrode of the diode D4 is connected with pin 3 of the rectifier stack UR through pin 596, the negative electrode is connected with the positive electrode of the battery E1, and the normally-closed contact J8-2 of the relay J1 is connected between pin 1-1 of the normally open contact J1.
Furthermore, the model of the diode D4 is IN4007, and the model of the diode D3 is IN 5408; the triode BG3 is an NPN type triode with the model number of 3DD 15D; the transistor BG4 is an NPN transistor with model number 3DD 15D.
Further, the voltage reduction charging circuit comprises a battery E1, a battery E2, a battery E3, a diode D5, a direct current motor M, a normally open contact J1-1 of a relay J1, a normally closed contact J1-2, a lamp bulb HD and a switch S2; the battery E1, the battery E2 and the battery E3 are connected in series through a normally closed contact J1-2 of a relay J1 and connected in parallel through a normally open contact J1-1 of a relay J1, a diode D5 and the direct current motor M are connected between the fixed end of a switch S2 and the ground in parallel, 1 of a switch S2 is connected with the positive electrode of the battery E1, 2 of the switch S2 is connected with the common point of the normally open contact J1-1 and the normally closed contact J1-2 of the relay J1, and the bulb HD is connected between the normally open contact J1-1 of the relay J1 and the positive electrode of the battery E1.
Further, the model number of the diode D5 is IN 5408; the bulb HD is a slide show bulb, and the rated voltage and the rated power are respectively 24V/300W; the battery E1, the battery E2 and the battery E3 are all 12V/12Ah storage batteries.
A charging method based on the electric vehicle downhill charging circuit is characterized in that: when the electric vehicle runs downhill and the vehicle speed is lower than 20km/h, a pin 1 of the integrated circuit IC1 outputs low level, the triode BG2 is cut off, the relay J1 does not attract, the normally open contact J1-1 is opened, the normally closed contact J1-2 is closed, electric energy generated by the motor M drives the triode BG3 and the triode BG4, the voltage is boosted through a secondary winding after passing through a push-pull oscillating circuit formed by a boosting transformer B, the voltage is rectified by a rectifier stack, the direct current voltage of 44V is obtained through filtering of a capacitor C3, and the battery E1, the battery E2 and the battery E3 are charged through a diode D4.
A charging method based on the electric vehicle downhill charging circuit is characterized in that: if the speed per hour of the electric vehicle running downhill exceeds 20km/h, a pin 1 of the integrated circuit IC1 outputs high level, the triode BG2 is conducted, the relay J1 is attracted, the normally open contact J1-1 is closed, the normally closed contact J1-2 is opened, the boosting charging circuit stops working, and the storage batteries E1, E2 and E3 are changed from series connection to parallel connection; when the vehicle speed is increased, the charging voltage is increased, the thermal resistance of the lamp bulb HD is lightened, the voltage at two ends is increased, the charging current is limited, the charging current of each storage battery cannot exceed the limit, and the whole circuit is protected to work safely.
The invention has the beneficial effects that:
the invention can supplement the energy of the storage battery in time, greatly prolong the service life of the storage battery and increase the driving range. Meanwhile, a strong braking force can be generated during charging, the abrasion of a brake pad can be reduced, the vehicle speed is automatically reduced, and the driving is safer.
When the electric vehicle descends at a speed of 20km/h, the charging current is about 2-5A, the vehicle speed is 40km/h, and the charging current is 7.5A. If the calculation is carried out according to the accumulated 1 hour of the riding downhill road section, the storage battery is charged for 1.6Ah, and the riding distance is prolonged for 6.5 km.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
A downhill charging circuit of an electric vehicle comprises a speed measurement comparison circuit, a boost charging circuit and a buck charging circuit; when the electric vehicle runs on a downhill, the downhill charging switch is turned on, the speed measurement comparison circuit adopts a boost charging mode after detecting that the speed of the electric vehicle is lower than a preset speed at the moment, and adopts a buck charging mode if detecting that the speed of the electric vehicle is higher than the preset speed at the moment.
Specific circuit diagrams of the speed measurement comparison circuit, the boost charging circuit and the buck charging circuit in the above embodiments are given below.
As shown in fig. 1, the speed measurement comparison circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a potentiometer RP1, a potentiometer RP2, a diode D1, a diode D2, a transistor BG1, a transistor BG2, an integrated circuit IC1, a relay J1, a speed measurement sensor R, and a switch S1.
Wherein, the resistor R1 is connected between the positive pole of the battery E1 and the collector of the transistor BG1, the resistor R2 is connected between the emitter of the transistor BG1 and the ground, the resistor R3 is connected between the collector of the transistor BG1 and the ground, the resistor R4 is connected between the 2 pin of the integrated circuit IC1 and the ground, the resistor R5 is connected between the base of the transistor BG2 and the negative pole of the diode D1, the resistor R6 is connected between the emitter of the transistor BG2 and the ground, the potentiometer RP1 is connected between the positive pole of the battery E1 and the base of the transistor BG1, the potentiometer RP1 is connected between the positive pole of the battery E1 and the 2 pin of the integrated circuit IC1, the positive pole of the diode D1 is connected with the 1 pin of the integrated circuit IC1, the negative pole is connected with the resistor R1, the base of the transistor BG1 is connected between the base of the transistor BG1 and the ground, the connection point of the collector of the transistor BG1 is connected with the resistor R1 and the, the base electrode of the triode BG2 is connected with the resistor R5, the collector electrode is connected with the relay J1, the emitter electrode is connected with the resistor R6, the 1 pin of the integrated circuit IC1 is connected with the anode of the diode D1, the 2 pin is connected with the connection point of the potentiometer RP2 and the resistor R4, the 3 pin is connected with the collector electrode of the triode BG1, the 4 pin is grounded, the 8 pin is connected with the anode of the battery E1, the relay J1 is connected with the diode D2 in parallel and then connected between the fixed end of the switch S1 and the collector electrode of the triode BG2, the '1' end of the switch S1 is suspended, and the '2' end is.
In the above embodiment, the integrated circuit IC1 is a LM358 chip; the types of the diode D1, the diode D2 and the diode D4 are all IN 4007; the triode BG1 is an NPN type triode with the model number of 9014; the triode BG2 is an NPN type triode with the model of ZTX 300;
the switches S1-S2 are linked wave band switches with two groups of contacts; the model of the speed measurement sensor R is SCA 1000-D01.
With continued reference to fig. 1, the boost charging circuit includes a resistor R7, a resistor R8, a capacitor C1, a capacitor C2, a capacitor C3, a diode D3, a diode D4, a transistor BG3, a transistor BG4, a rectifier stack UR, a transformer B, a normally closed contact J1-2 of a relay J1, and a fuse FU.
The resistor R7 is connected between pin 2 of an input coil B1-1 of the transformer B and pin 2 of an input coil B1-2 of the transformer B, the resistor R8 is connected between pin 3 and pin 4 of the rectifier stack UR, the positive electrode of the capacitor C1 is connected with pin 2 of an input coil B1-1 of the transformer B, the negative electrode is grounded, the capacitor C2 is connected between pin 1 and pin 3 of an input coil B1-1 of the transformer B, the positive electrode of the capacitor C3 is connected with pin 3 of the rectifier stack UR, the negative electrode is connected with pin 4 of the rectifier stack UR, the positive electrode of the diode D3 is connected with the emitter of the triode BG3, the negative electrode is connected with pin 2 of the input coil B1-1 of the transformer B, the positive electrode of the diode D4 is connected with pin 3 of the rectifier stack UR through pin 596, the negative electrode is connected with the positive electrode of the battery E1, and the normally-closed contact J8-2 of the relay J1 is connected between pin 1-1 of the normally open contact J1.
IN the above embodiment, the model of the diode D4 is IN4007, and the model of the diode D3 is IN 5408; the triode BG3 is an NPN type triode with the model number of 3DD 15D; the transistor BG4 is an NPN transistor with model number 3DD 15D.
With continued reference to FIG. 1, the buck charging circuit includes battery E1, battery E2, battery E3, diode D5, DC motor M, normally open contact J1-1 of relay J1, normally closed contact J1-2, light bulb HD, and switch S2.
The battery E1, the battery E2 and the battery E3 are connected in series through a normally closed contact J1-2 of a relay J1 and connected in parallel through a normally open contact J1-1 of a relay J1, a diode D5 and the direct current motor M are connected between the fixed end of a switch S2 and the ground in parallel, 1 of a switch S2 is connected with the positive electrode of the battery E1, 2 of the switch S2 is connected with the common point of the normally open contact J1-1 and the normally closed contact J1-2 of the relay J1, and the bulb HD is connected between the normally open contact J1-1 of the relay J1 and the positive electrode of the battery E1.
IN the above embodiment, the model number of the diode D5 is IN 5408; the bulb HD is a slide show bulb, and the rated voltage and the rated power are respectively 24V/300W; the battery E1, the battery E2 and the battery E3 are all 12V/12Ah storage batteries.
The working principle of the invention is as follows:
when the electric vehicle is normally driven, the switch S1 is turned to the end '1', the downhill charging circuit does not work, and the three batteries E1, E2 and E3 are connected in series to supply power to the motor. When the electric vehicle runs downhill, the switch S1 is dialed to the '2' end, the speed measurement comparison circuit is connected, when the vehicle speed is lower than 20km/h, the pin 1 of the integrated circuit IC1 outputs low level, the triode BG2 is cut off, the relay J1 is not attracted, the normally open contact J1-1 is disconnected, the normally closed contact J1-2 is closed, electric energy generated by the motor M drives the triode BG3 and the triode BG4, the electric energy is boosted through a push-pull oscillation circuit formed by the boosting transformer B and then boosted through a secondary winding, a rectifier stack rectifies, the capacitor C3 filters to obtain about 44V direct current voltage, the storage battery groups E1, E2 and E3 are charged through the diode D4, the resistor R7 is a bias current resistor, the capacitor C2 is a peak clipping capacitor and is used for preventing the triodes BG3 and BG4 from being broken down in no-load, and the diode D3 is an.
If the speed per hour of the electric vehicle on the downhill exceeds 20km/h, a pin 1 of an integrated circuit IC1 outputs high level, a triode BG2 is conducted, a relay J1 is attracted, a normally open contact J1-1 of the electric vehicle is closed, a normally closed contact J1-2 of the electric vehicle is opened, a boosting charging circuit stops working, storage batteries E1, E2 and E3 are connected in parallel from series, HD is a slide show bulb, the cold resistance of the storage batteries is 0.2 omega, the charging circuit is basically not influenced when the electric vehicle does not work, the charging voltage is increased when the vehicle speed is increased, HD is lightened, the thermal resistance of the storage batteries is rapidly increased, and the voltages at two ends of the storage batteries are increased, so that the charging current is limited, the charging current of each storage battery is not over-limited, and the.
When the electric vehicle descends at a speed of 20km/h, the charging current is about 2-5A, the vehicle speed is 40km/h, and the charging current is 7.5A. If the calculation is carried out according to the accumulated 1 hour of the riding downhill road section, the storage battery is charged for 1.6Ah, and the riding distance is prolonged for 6.5 km.
The invention can supplement the energy of the storage battery in time, greatly prolong the service life of the storage battery and increase the driving range. Meanwhile, a strong braking force can be generated during charging, the abrasion of a brake pad can be reduced, the vehicle speed is automatically reduced, and the driving is safer.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (9)
1. An electric vehicle downhill charging circuit, characterized in that: the device comprises a speed measurement comparison circuit, a boosting charging circuit and a voltage reduction charging circuit;
when the electric vehicle runs on a downhill, the downhill charging switch is turned on, the speed measurement comparison circuit adopts a boost charging mode when detecting that the speed of the electric vehicle is lower than a preset speed at the moment, and adopts a buck charging mode if detecting that the speed of the electric vehicle is higher than the preset speed at the moment;
the boost charging circuit comprises a resistor R7, a resistor R8, a capacitor C1, a capacitor C2, a capacitor C3, a diode D3, a diode D4, a triode BG3, a triode BG4, a rectifier stack UR, a transformer B, a normally closed contact J1-2 of a relay J1 and a fuse FU;
the resistor R7 is connected between pin 2 of an input coil B1-1 of the transformer B and pin 2 of an input coil B1-2 of the transformer B, the resistor R8 is connected between pin 3 and pin 4 of the rectifier stack UR, the positive electrode of the capacitor C1 is connected with pin 2 of an input coil B1-1 of the transformer B, the negative electrode is grounded, the capacitor C2 is connected between pin 1 and pin 3 of an input coil B1-1 of the transformer B, the positive electrode of the capacitor C3 is connected with pin 3 of the rectifier stack UR, the negative electrode is connected with pin 4 of the rectifier stack UR, the positive electrode of the diode D3 is connected with the emitter of the triode BG3, the negative electrode is connected with pin 2 of the input coil B1-1 of the transformer B, the positive electrode of the diode D4 is connected with pin 3 of the rectifier stack UR through pin 596, the negative electrode is connected with the positive electrode of the battery E1, and the normally-closed contact J8-2 of the relay J1 is connected between pin 1-1 of the normally open contact J1.
2. The electric vehicle downhill charging circuit according to claim 1, wherein: the preset speed is 20 km/h.
3. The electric vehicle downhill charging circuit according to claim 1, wherein: the speed measurement comparison circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a potentiometer RP1, a potentiometer RP2, a diode D1, a diode D2, a triode BG1, a triode BG2, an integrated circuit IC1, a relay J1, a speed measurement sensor R and a switch S1;
wherein, the resistor R1 is connected between the positive pole of the battery E1 and the collector of the transistor BG1, the resistor R2 is connected between the emitter of the transistor BG1 and the ground, the resistor R3 is connected between the collector of the transistor BG1 and the ground, the resistor R4 is connected between the 2 pin of the integrated circuit IC1 and the ground, the resistor R5 is connected between the base of the transistor BG2 and the negative pole of the diode D1, the resistor R6 is connected between the emitter of the transistor BG2 and the ground, the potentiometer RP1 is connected between the positive pole of the battery E1 and the base of the transistor BG1, the potentiometer RP1 is connected between the positive pole of the battery E1 and the 2 pin of the integrated circuit IC1, the positive pole of the diode D1 is connected with the 1 pin of the integrated circuit IC1, the negative pole is connected with the resistor R1, the base of the transistor BG1 is connected between the base of the transistor BG1 and the ground, the connection point of the collector of the transistor BG1 is connected with the resistor R1 and the, the base electrode of the triode BG2 is connected with the resistor R5, the collector electrode is connected with the relay J1, the emitter electrode is connected with the resistor R6, the 1 pin of the integrated circuit IC1 is connected with the anode of the diode D1, the 2 pin is connected with the connection point of the potentiometer RP2 and the resistor R4, the 3 pin is connected with the collector electrode of the triode BG1, the 4 pin is grounded, the 8 pin is connected with the anode of the battery E1, the relay J1 is connected with the diode D2 in parallel and then connected between the fixed end of the switch S1 and the collector electrode of the triode BG2, the '1' end of the switch S1 is suspended, and the '2' end is.
4. The electric vehicle downhill charging circuit according to claim 3, wherein: the integrated circuit IC1 is LM358 chip; the types of the diode D1, the diode D2 and the diode D4 are all IN 4007;
the triode BG1 is an NPN type triode with the model number of 9014; the triode BG2 is an NPN type triode with the model of ZTX 300;
the switches S1-S2 are linked wave band switches with two groups of contacts; the model of the speed measurement sensor R is SCA 1000-D01.
5. The electric vehicle downhill charging circuit according to claim 1, wherein: the type of the diode D4 is IN4007, and the type of the diode D3 is IN 5408; the triode BG3 is an NPN type triode with the model number of 3DD 15D; the transistor BG4 is an NPN transistor with model number 3DD 15D.
6. The electric vehicle downhill charging circuit according to claim 1, wherein: the voltage-reducing charging circuit comprises a battery E1, a battery E2, a battery E3, a diode D5, a direct-current motor M, a normally open contact J1-1 of a relay J1, a normally closed contact J1-2, a lamp bulb HD and a switch S2;
the battery E1, the battery E2 and the battery E3 are connected in series through a normally closed contact J1-2 of a relay J1 and connected in parallel through a normally open contact J1-1 of a relay J1, a diode D5 and the direct current motor M are connected between the fixed end of a switch S2 and the ground in parallel, 1 of a switch S2 is connected with the positive electrode of the battery E1, 2 of the switch S2 is connected with the common point of the normally open contact J1-1 and the normally closed contact J1-2 of the relay J1, and the bulb HD is connected between the normally open contact J1-1 of the relay J1 and the positive electrode of the battery E1.
7. The electric vehicle downhill charging circuit of claim 6, wherein: the type of the diode D5 is IN 5408; the bulb HD is a slide show bulb, and the rated voltage and the rated power are respectively 24V/300W; the battery E1, the battery E2 and the battery E3 are all 12V/12Ah storage batteries.
8. A charging method for an electric vehicle downhill charging circuit according to any one of claims 1 to 7, characterized in that: when the electric vehicle runs downhill and the vehicle speed is lower than 20km/h, a pin 1 of the integrated circuit IC1 outputs low level, the triode BG2 is cut off, the relay J1 does not attract, the normally open contact J1-1 is opened, the normally closed contact J1-2 is closed, electric energy generated by the motor M drives the triode BG3 and the triode BG4, the voltage is boosted through a secondary winding after passing through a push-pull oscillating circuit formed by a boosting transformer B, the voltage is rectified by a rectifier stack, the direct current voltage of 44V is obtained through filtering of a capacitor C3, and the battery E1, the battery E2 and the battery E3 are charged through a diode D4.
9. A charging method for an electric vehicle downhill charging circuit according to any one of claims 1 to 7, characterized in that: if the speed per hour of the electric vehicle running downhill exceeds 20km/h, a pin 1 of the integrated circuit IC1 outputs high level, the triode BG2 is conducted, the relay J1 is attracted, the normally open contact J1-1 is closed, the normally closed contact J1-2 is opened, the boosting charging circuit stops working, and the storage batteries E1, E2 and E3 are changed from series connection to parallel connection; when the vehicle speed is increased, the charging voltage is increased, the thermal resistance of the lamp bulb HD is lightened, the voltage at two ends is increased, the charging current is limited, the charging current of each storage battery cannot exceed the limit, and the whole circuit is protected to work safely.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2826797Y (en) * | 2005-10-31 | 2006-10-11 | 龙丽梅 | Automatic charger for electric bicycle when gliding and riding |
| CN201227961Y (en) * | 2008-06-23 | 2009-04-29 | 曹营聚 | Electric charging controller for electric motor vehicle |
| CN202042936U (en) * | 2011-05-06 | 2011-11-16 | 武文华 | Voltage boosting type sliding automatic charging device for electric vehicle transformer |
| CN106585404A (en) * | 2016-12-06 | 2017-04-26 | 台州市中能元亨佑吉电动车有限公司 | Electric bicycle energy recovery system and method |
| CN107878206A (en) * | 2016-09-30 | 2018-04-06 | 无锡超钰微电子有限公司 | Braking energy source recycling module |
-
2018
- 2018-08-10 CN CN201810914375.7A patent/CN108879911B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2826797Y (en) * | 2005-10-31 | 2006-10-11 | 龙丽梅 | Automatic charger for electric bicycle when gliding and riding |
| CN201227961Y (en) * | 2008-06-23 | 2009-04-29 | 曹营聚 | Electric charging controller for electric motor vehicle |
| CN202042936U (en) * | 2011-05-06 | 2011-11-16 | 武文华 | Voltage boosting type sliding automatic charging device for electric vehicle transformer |
| CN107878206A (en) * | 2016-09-30 | 2018-04-06 | 无锡超钰微电子有限公司 | Braking energy source recycling module |
| CN106585404A (en) * | 2016-12-06 | 2017-04-26 | 台州市中能元亨佑吉电动车有限公司 | Electric bicycle energy recovery system and method |
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|---|---|
| CN108879911A (en) | 2018-11-23 |
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Effective date of registration: 20220708 Address after: No. 153, Qinghong Road, Ehu Industrial Park, Ehu Town, Xishan District, Wuxi City, Jiangsu Province Patentee after: JIANGSU ZONGSHEN ELECTRIC VEHICLE Co.,Ltd. Address before: No. 1 Xiangwang Road, Drum Tower District, Xuzhou, Jiangsu Patentee before: XUZHOU College OF INDUSTRIAL TECHNOLOGY |