CN111251933A

CN111251933A - Intelligent charging method for electric bicycle

Info

Publication number: CN111251933A
Application number: CN201911181487.7A
Authority: CN
Inventors: 秦宏帅
Original assignee: Hangzhou Pioneer Electronic Technology Co ltd
Current assignee: Hangzhou Pioneer Electronic Technology Co ltd
Priority date: 2018-11-30
Filing date: 2019-11-27
Publication date: 2020-06-09

Abstract

The invention discloses an intelligent charging method for an electric bicycle, which comprises the following steps: step S1: the method comprises the steps that a charger obtains a charging demand instruction of a user; step S2: detecting whether the electric bicycle is parked at a designated position; step S3: detecting whether the charging connection is normal; step S4: according to the charging requirement of a user, the charger directly outputs a charging signal to charge the electric bicycle. Compared with the prior art, the charging module is integrated in the charger and the electric bicycle is powered by adopting a direct-insertion power supply mode, so that the potential safety hazard problem caused by the use of the charger by a user is avoided; meanwhile, the charging parameters can be intelligently adjusted according to the charging load condition, so that the charging safety performance is greatly improved; furthermore, the safety positioning lock is arranged on the charging site, so that the storage battery car is prevented from being stolen, and the situation that the electric bicycle is parked in a mess is avoided.

Description

Intelligent charging method for electric bicycle

Technical Field

The invention relates to the field of electric bicycle charging, in particular to an intelligent charging method for an electric bicycle.

Background

At present, the existing intelligent charging mode of the electric bicycle usually adopts a switch mode of controlling a power socket by a charger to provide intelligent charging service, and usually, the on-time of the power socket is controlled simply by the payment condition of a user, so that the following defects exist: 1. a user uses a self-contained charger, the charging parameters of the charger are not uniform, the quality is different, and potential safety hazards are easy to exist; 2. the existing standard electric bicycle charger usually adopts a three-section mode, the quick charging mode of the first section adopts constant large current charging, the service life of the battery can be shortened, the battery is damaged, a good charging effect can be achieved only by completing the three sections, and the waiting time is long; 3. when a large number of electric bicycles are charged simultaneously, the charging parameters cannot be regulated, so that the surge charging is caused, the grid pressure is increased, and potential safety hazards exist.

Therefore, it is necessary to provide a technical solution to solve the technical problems of the prior art.

Disclosure of Invention

In view of the above, it is necessary to provide an intelligent charging method for an electric bicycle, in which a charging module is integrated in a charger and a direct-insertion power supply mode is adopted to supply power to the electric bicycle, so as to avoid the potential safety hazard problem when a user uses a self-contained charger; meanwhile, the charging parameters can be intelligently adjusted according to the charging load condition, so that the charging safety performance is greatly improved; furthermore, the safety positioning lock is arranged on the charging site, so that the storage battery car is prevented from being stolen, and the situation that the electric bicycle is parked in a mess is avoided.

In order to solve the technical problems in the prior art, the technical scheme of the invention is as follows:

an intelligent charging method for an electric bicycle, comprising the steps of:

step S1: the method comprises the steps that a charger obtains a charging demand instruction of a user;

step S2: detecting whether the electric bicycle is parked at a designated position;

step S3: detecting whether the charging connection is normal;

step S4: according to the charging requirement of a user, the charger directly outputs a charging signal to charge the electric bicycle.

As a preferred technical solution, the method further comprises:

step S5: the charging machine sends the charging process parameters to the cloud server in real time, and the cloud server enables the charging parameters to be optimal through big data processing.

As a preferred technical solution, in the step S1, the user accesses the cloud server through the mobile terminal and sends a user charging demand instruction, and the cloud server sends the user charging demand instruction to the charger and controls the corresponding charger to perform a charging operation.

As a preferred technical solution, in the step S2, the charger determines whether the electric bicycle is parked at a designated position by acquiring information of a sensor provided on the safety positioning lock, where the sensor at least includes a pressure sensor and an angle sensor.

As a preferred technical scheme, the safety positioning lock is connected with the charger and used for executing unlocking or locking operation according to an instruction of the charger;

the safety positioning lock further comprises a fixing plate, supporting plates which are vertically arranged are arranged on two sides of the fixing plate respectively, a channel for two-wheel or three-wheel electric vehicle front wheels to enter is formed between the two supporting plates, a rotating shaft stretching in the channel is connected between the two supporting plates, an arc-shaped locking concave surface of a wheel locking arch plate and a wheel locking arch plate which are fixedly connected with the circumferential direction of the rotating shaft faces upwards, the rotating shaft can be driven to rotate to drive a driving mechanism for driving the wheel locking arch plate to swing, a pressure sensor is arranged in one end, into which the wheel of the wheel locking arch plate enters, and an angle sensor is arranged on the rotating shaft.

The driving mechanism comprises a driving motor, the driving motor rotates back and forth to control the rotating shaft to rotate back and forth, of course, the driving mechanism can also be a driving cylinder or an oil cylinder and the like, namely, the telescopic rod extends and contracts, and then the rotating shaft is driven to rotate in an eccentric driving mode.

The eccentric driving wheel can be used for connecting the rotating shaft and the air cylinder or the oil cylinder.

The pressure sensor is used for detecting the weight pressure of the wheels entering the wheel locking arch-shaped plate, can detect the weight of all the wheels entering the wheel locking arch-shaped plate, and when the weight is lighter than the set weight pressure or higher than the set weight pressure, the driving mechanism is not started, so that the waste of resources caused by the occupation of the parking space is avoided.

The angle sensor can avoid the phenomenon that the wheel is inclined or overturned due to excessive rotation.

The passageway that two backup pads formed, it can further improve managerial efficiency and quality, simultaneously, can also improve parking factor of safety, has avoided slope or turnover phenomenon, in addition, in coordination with wheel locking arch shaped plate, it can form the restriction of front and back, has avoided freely traveling to lead to the parking to have the potential safety hazard.

As a further improvement scheme, a user accesses a cloud server through a mobile terminal, and the cloud server sends a user charging demand instruction to the charger so as to control the corresponding charger to execute charging operation.

As a further improvement, the charger further comprises an output mechanism, a charging module, a control module, a communication module and a safety positioning lock control module, wherein,

the output mechanism is connected with the output end of the charging module, adopts a telescopic structure and is used for physically connecting a charging interface of the electric bicycle;

the charging module is controlled by the control module and is used for outputting a charging signal to charge the electric bicycle;

the communication module is used for accessing the cloud server and realizing data communication;

the safety positioning lock control module is connected with the safety positioning lock and used for controlling the safety positioning lock to work;

the control module is connected with the charging module, the communication module and the safety positioning lock control module and is used for controlling the work of the charger.

As a further improvement, the charging module further comprises a power factor correction circuit, a total voltage transformation circuit, a feedback control circuit and a sampling module, wherein,

the power factor correction circuit is connected with an alternating current commercial power and is used for carrying out power factor correction and outputting direct current high voltage;

the feedback control circuit is connected with the control module and used for acquiring the PWM signal of the control module and sending the PWM signal to the total voltage transformation circuit;

the total voltage transformation circuit is connected with the feedback control circuit and the control module and is used for outputting a stable direct current charging signal in a variable voltage intermittent negative pulse charging mode;

the sampling module is used for obtaining a voltage value and a current value of an output charging signal and feeding back the voltage value and the current value to the control module, and the control module adjusts the output of the feedback control circuit and the control waveform of the variable voltage intermittent negative pulse mode in real time according to the charging signal.

As a further improvement, the pressure sensor is used for detecting pressure information on the safety positioning lock; the charger acquires the pressure information and judges whether the electric bicycle is locked or not according to the pressure information.

In the safety positioning lock, the middle of the lower surface of the wheel locking arch plate is provided with a rotating shaft hole arranged along the width direction of the wheel locking arch plate, and the rotating shaft is inserted into the rotating shaft hole and can rotate relative to the rotating shaft hole.

The rotating shaft hole can be convenient to install and process, and the swinging smoothness of the wheel locking arch plate is improved.

According to the optimized scheme, shaft sleeves are arranged at two ends of the rotating shaft or two ends of the rotating shaft hole, and rotating friction force can be reduced.

In the safety positioning lock, the middle part of the lower surface of the wheel locking arch plate protrudes downwards and is provided with an arch convex part along the width direction of the wheel locking arch plate, and the rotating shaft hole is arranged in the arch convex part.

The arched convex part is triangle-shaped, and the arched convex part has the arc convex surface, and the arc convex surface is connected with wheel locking arched plate lower surface both ends through two arc concave surfaces.

In foretell safe positioning lock, wheel locking arch shaped plate including down deflector and the last locating plate of connecting deflector one end under, lower deflector upper surface and last locating plate upper surface level and smooth connection form arc locking concave surface, keep away from down the one end of deflector and be connected with crooked limiting plate at last locating plate.

The arc locking concave surface can form self locking, and free running of the wheel is avoided.

The designed bending limit plate can limit and limit, and the design is more humanized.

In the safety positioning lock, the lower surface of one end of the lower guide plate, which is far away from the upper positioning plate, is provided with a contact plane which can be matched with the ground.

The structure can avoid the abrasion phenomenon to the maximum extent, and simultaneously, the stability of contact with the ground can be further improved.

In the above-mentioned safety positioning lock, the two support plates are parallel to each other.

Parallel to each other, it can form the protection of both sides, simultaneously, also can be convenient for manufacturing.

In the safety positioning lock, the fixing plate is provided with a plurality of mounting and fixing holes, the fixing plate and the supporting plate are respectively made of metal plates, and the fixing plate and the supporting plate are fixed together by welding.

The one end that the backup pad is close to the human body is equipped with the arc and dodges the concave surface, has arc convex surface one on the side of going up of backup pad to and be located the arc convex surface two of backup pad rear end.

The vertical height of the supporting plate is gradually increased from one end of the supporting plate close to the human body to the back.

The safety positioning lock comprises a fixing plate, wherein two sides of the fixing plate are respectively provided with a vertically arranged supporting plate, a channel for the front wheel of a two-wheel or three-wheel electric vehicle to enter is formed between the two supporting plates, a rotating shaft stretching in the channel is connected between the two supporting plates, a wheel locking arch plate fixedly connected with the circumferential direction of the rotating shaft is connected to the rotating shaft, the arc locking concave surface of the wheel locking arch plate faces upwards, the rotating shaft is connected with a driving mechanism capable of driving the rotating shaft to rotate so as to drive the wheel locking arch plate to swing, a pressure sensor is arranged in one end, into which a wheel of the wheel locking arch plate enters, an angle sensor is arranged on the rotating shaft, and the pressure sensor and the angle sensor are respectively connected with; the use method of the safety positioning lock comprises the following steps:

s1, the driving mechanism drives the rotating shaft to rotate anticlockwise so as to drive the wheel locking arch-shaped plate to swing synchronously, and the lower surface of one end, into which the wheel enters, of the wheel locking arch-shaped plate is in contact with the ground;

s2, driving the front wheel of the two-wheel or three-wheel electric vehicle into the wheel locking arch-shaped plate to supply the upper surface of one end of the wheel to enter, wherein the pressure sensor sends a weight signal to the safety positioning lock control module by detecting the weight of the electric vehicle driven into the wheel locking arch-shaped plate, and when the detected weight signal is the weight signal in a set interval, the safety positioning lock control module controls the driving mechanism to drive the rotating shaft to rotate clockwise, so that the wheel locking arch-shaped plate is forced to be separated from the ground upwards, the angle sensor sends a rotating shaft rotating angle signal to the safety positioning lock control module, and then the intelligent charging system of the electric bicycle is electrically connected with the electric vehicle, namely, the charging is started.

In the above safety positioning lock, the rotation angle of the rotating shaft is less than 270 °.

Compared with the prior art, the invention has the following technical effects:

1. the charging module is integrated in the charger, and the electric bicycle is powered by a direct-insertion power supply mode, so that the potential safety hazard problem caused by the use of the charger of a user is avoided;

2. the existing electric vehicle charger only provides a power socket, cannot adjust charging parameters according to charging load, and has certain potential safety hazard due to overlarge charging load; the charger integrates the existing battery car charger into the charger, so that the charging parameters can be intelligently adjusted according to the charging load condition, and the charging safety performance is greatly improved;

3. according to the framework, the charging parameter information can be conveniently uploaded to the cloud server, and the cloud server side can give an optimized charging selection mode through big data analysis;

4. the safety positioning lock is arranged, so that the battery car is prevented from being stolen, and the condition that the electric bicycle is parked in a mess is avoided; in addition, the invention provides a design of a safety positioning lock, so that the unlocking and locking operations of the electric bicycle can be conveniently realized;

5. the invention further optimizes the charging mode, adopts a variable voltage intermittent negative pulse curve to realize charging and repairing simultaneously, achieves the effect which is achieved only when the three-section type charging method is completed completely, and realizes quick and scientific charging.

Drawings

Fig. 1 is an architecture diagram of a field charging unit of the present invention.

Fig. 2 is a schematic diagram of an on-site charging unit according to the present invention.

Fig. 3 is a schematic block diagram of a charger according to the present invention.

FIG. 4 is a schematic diagram of a power calibration circuit according to the present invention.

Fig. 5 is a schematic diagram of a total voltage transformation circuit according to the present invention.

FIG. 6 is a schematic diagram of a negative pulse generating circuit according to the present invention.

FIG. 7 is a schematic diagram of a feedback control circuit according to the present invention.

Fig. 8 is a schematic diagram of a charging method according to the present invention.

FIG. 9 is a schematic diagram of a portion of ports of the single chip microcomputer of the present invention.

Fig. 10 is a schematic view of the working process of the safety positioning lock of the present invention.

FIG. 11 is a schematic diagram of the system operation of the present invention.

Fig. 12 is a schematic structural view of the safety positioning lock of the present invention.

FIG. 13 is a block diagram of the controls provided by the secure positioning lock of the present invention.

Fig. 14 is a flow chart diagram of the intelligent charging method for the electric bicycle of the present invention.

The following specific embodiments will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

The technical solution provided by the present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 14, a flow chart of the intelligent charging method for the electric bicycle of the present invention is shown, which includes the following steps:

step S3: detecting whether the charging connection is normal;

Further, the method also comprises the following steps:

In step S1, the user accesses the cloud server through the mobile terminal and sends a user charging demand instruction, and the cloud server sends the user charging demand instruction to the charger and controls the corresponding charger to perform a charging operation.

In step S2, the charger determines whether the electric bicycle is parked at a designated position by acquiring information of a sensor provided on the safety positioning lock, where the sensor at least includes a pressure sensor and an angle sensor.

Referring to fig. 1 and 2, which are schematic block diagrams and schematic diagrams of an on-site charging unit according to the present invention, an overall architecture at least includes a cloud server and a plurality of on-site charging units remotely connected to the cloud server, wherein,

the cloud server is used for receiving a charging demand instruction of a user and controlling the corresponding field charging unit to execute charging operation;

the field charging unit at least comprises chargers and safety positioning locks, each charger can be connected with a plurality of safety positioning locks, and the chargers are used for receiving charging control instructions sent by the cloud server and outputting charging signals according to the charging control instructions; and the safety positioning lock is connected with the charger and used for executing unlocking or locking operation according to the instruction of the charger.

Specifically, the cloud server includes a data management module and a communication platform. The data management module is used for storing data of a user in the charging process and analyzing by utilizing big data, and the processing result comprises a duration selection suggestion before charging, state information of a safety positioning lock during charging, charging process information and the like. The communication platform refers to a platform capable of providing mobile communication services, such as china mobile, china telecommunications, and the like. The cloud server is built on public platforms such as the Ali cloud and the Tencent cloud. The specific implementation mode is as follows: the user sends a charging request command to the cloud server end through the user terminal, the cloud server end sends the charging command to the charger through the communication platform, the charger receives and starts related command operation, the charger is connected with the safety positioning lock, and the cloud server indirectly controls the safety positioning lock through controlling the charger. The charger uploads data (including real-time voltage and current data of the electric bicycle, safety positioning lock data and the like) to the cloud server through the communication module. The cloud server processes the data by using the data processing module, and sends results such as a duration selection suggestion before charging and the like to the user terminal, so that the user can know the charging process of the electric bicycle in detail.

Referring to fig. 3, a schematic block diagram of a charger according to the present invention is shown, wherein the charger includes an output mechanism, a charging module, a control module, a communication module, and a safety lock control module. The charging module is controlled by the control module and used for outputting a charging signal to charge the electric bicycle. The power factor correction circuit comprises a power factor correction circuit, a feedback control circuit, a total voltage transformation circuit and a sampling module. The power factor correction circuit is connected with an alternating current commercial power and is used for carrying out power factor correction and outputting direct current high voltage; the voltage transformation circuit is connected with the feedback control circuit and the control module and is used for outputting a stable direct current charging signal in a variable voltage intermittent negative pulse mode; the sampling module is used for obtaining a voltage value and a current value of the output charging signal and feeding back the voltage value and the current value to the control module, and the control module adjusts the output of the feedback control circuit and the control waveform of the variable voltage intermittent negative pulse mode in real time according to the charging signal.

Further, the charging module further comprises a power factor correction circuit, a total voltage transformation circuit, a feedback control circuit and a sampling module, wherein,

Referring to fig. 4, a schematic diagram of a power correction circuit is shown, which includes a power correction IC, a rectifier bridge D11, a diode D12, a MOS transistor Q11, a resistor R11, an inductor L11, and capacitors C11 to C12; the utility power is connected with

ports

1 and 3 of a rectifier bridge D11, a port 2 of the rectifier bridge D11 is connected with an anode of a capacitor C11, one end of one side of an inductor L11 and a power correction IC, a port 4 of the rectifier bridge D11 is connected with a cathode of a capacitor C11, one end of a resistor R11 and the power correction IC, the other end of the R11 is connected with the power correction IC, a source of an MOS tube Q11, a cathode of a load end and a cathode of a capacitor C12 and then grounded, the other end of one side of the inductor L11 is connected with an anode of a diode D12 and a drain of the MOS tube Q11, two ends of the other side of the inductor L11 are connected with the power correction IC, and a cathode of the diode D12 is connected with an anode of the capacitor C12, the power correction; the power correction IC model is ICE2PCS 01;

the commercial power is connected into the rectifier bridge D11 and then becomes direct current, and starts to charge the capacitor C12, and when the MOS transistor Q11 is cut off, the voltage at the two ends of the capacitor C12 is equal to the direct current voltage. When the MOS transistor Q11 is turned on, the inductor L11 charges magnetic energy and stores energy, and when the MOS transistor Q11 is turned off, the voltage at the two ends of the inductor L11 is connected in series with the dc voltage to charge the capacitor C12, so that the 220V ac mains supply can be converted into 380V stable dc high voltage. The power correction circuit can reduce the AC ripple coefficient, promote smooth DC output, and output 380V stable DC high voltage after filtering.

In a preferred embodiment, the total voltage transformation circuit comprises a voltage transformation circuit and a negative pulse generation circuit; referring to fig. 5, a schematic diagram of a voltage transformation circuit is shown, which includes resistors R21-R30, capacitors C21-C32, a transformer T21, diodes D21-D22, a MOS transistor Q21, a triode Q22, a RELAY1, and a PWM control chip U21; a pin 1 of a PWM control chip U21 is connected with one end of a first capacitor C1 and then grounded, a pin 2 of the PWM control chip U21 is connected with the other end of the first capacitor C21 and a COMP port, a pin 3 of the PWM control chip U21 is connected with a Vref port, a pin 4 of the PWM control chip U21 is connected with one end of a first resistor R21 and one end of a third capacitor C23, a pin 5 of the PWM control chip U21 is connected with a grid electrode of a MOS tube Q21, a pin 6 of the PWM control chip U21 is connected with one end of a fourth capacitor C24, one end of a second resistor R22 and one end of a fifth resistor R25, a pin 7 of the PWM control chip U21 is connected with Vcc, a pin 8 of the PWM control chip U21 is connected with the other end of a second capacitor C22, the other end of the third capacitor C23, the other end of the fourth capacitor C24 and the other end of the second resistor R22 and then grounded, a source of the MOS tube R2, a pin 3 of the fourth resistor R8653 and a drain 86 21 are connected with an anode of the MOS tube Q828653, One end of a sixth capacitor C26 is connected with the negative electrode of the primary stage of the transformer T21, the cathode of a diode D21 is connected with one end of a third resistor R23 and one end of a fifth capacitor C25, the other end of the third resistor R23 is connected with the other end of a fifth capacitor C25, the positive electrode of the primary stage of the transformer T21 and the output port Vo380, the other end of the sixth capacitor C26 is connected with one end of a sixth resistor R26, the other end of the sixth resistor R26 is connected with the other end of a fourth resistor R24 and then grounded, the anode of a diode D22 is connected with the positive electrode of the secondary stage of the transformer T21 and one end of a seventh resistor R27, the other end of the seventh resistor R27 is connected with the positive electrode of a seventh capacitor C27, the positive electrode of an eighth capacitor C28, the positive electrode of a ninth capacitor C29, the positive electrode of a tenth capacitor C30, the positive electrode of an eleventh capacitor C31, the positive electrode of a twelfth capacitor C32, the positive electrode of an eighth capacitor C5953, the first end of an LAR 28 and a, the negative electrode of the secondary stage of the transformer T21 is connected with the negative electrode of a seventh capacitor C27, the negative electrode of an eighth capacitor C28, the negative electrode of a ninth capacitor C29, the negative electrode of a tenth capacitor C30, the negative electrode of an eleventh capacitor C31, the negative electrode of a twelfth capacitor C32, the other end of an eighth resistor R28 and one end of a tenth resistor R30 are connected and then grounded, the other end of a switch of a RELAY RELAY1 is connected with an output anode, a port V-battery and one end controlled by a RELAY RELAY1, the other end controlled by the RELAY RELAY1 is connected with a collector of a triode Q22, the base of the triode Q22 is connected with one end of a ninth resistor R29, and the other end of a ninth resistor R29 is connected with a port Relay; an emitter of the triode Q22 is connected with the other end of the tenth resistor R30, a port Cath and an output cathode; the model of the PWM control chip is UC3844, and the model of the RELAY RELAY1 is HF 7520-012-HSTP;

the transformation circuit is mainly composed of a flyback switching power supply, and can meet the requirement that the voltage of 380V stable direct current output by the power factor correction circuit is reduced to required stable direct current voltage by utilizing the principle of 'electric energy-magnetic energy-electric energy' conversion and pulse width modulation. The output end Vo380 of the power factor correction circuit is connected to the primary input end of the flyback switching power supply, and stable direct-current voltage can be output at the secondary stage according to the fact that input voltage and output voltage are in direct proportion to the turn ratio of the primary stage to the secondary stage. A COMP end in the PWM control chip U21 is connected with a COMP end of the feedback control circuit and used for adjusting PWM waves with different duty ratios output by an Out end and controlling the switching time ratio of the MOS tube Q21, the MOS tube D21 and the third resistor R23 are used for eliminating leakage inductance spikes, and the secondary output voltage is according to a formula: vout is the original secondary turn ratio duty ratio/(1-duty ratio) Vo380, and the output voltage of the Vout end is controlled by the duty ratio because the original secondary turn ratio is constant. The rear end of the secondary output is connected with RC filtering to eliminate an alternating current part mixed with output voltage; the Relay port is connected with the single chip microcomputer Relay port, the switch of the Relay RELAY1 is controlled through the triode Q22, the Relay RELAY1 is controlled by the single chip microcomputer, the Relay REALY1 is connected with the output structure K1, and when the Relay is closed, the direct current output structure K1 can directly output direct current voltage for charging the electric bicycle.

Referring to fig. 6, a schematic block diagram of a negative pulse generating circuit is shown, which includes resistors R31-R35, MOS transistors Q31-Q34, and a MOS transistor driving chip U1; a pin 1 of the MOS driver chip U31 is connected to the drain of the first MOS transistor Q31, the drain of the second MOS transistor Q32, the drain of the third MOS transistor Q33, the drain Q34 of the fourth MOS transistor, a pin 5 of the MOS driver chip U31, and the port Vout, a pin 2 of the MOS driver chip U31 is connected to the port En, a pin 3 of the MOS driver chip U31 is connected to a pin 4 of the MOS driver chip U31, one end of the second resistor R32, one end of the third resistor R33, one end of the fourth resistor R34, and one end of the fifth resistor R35, a pin 6 of the MOS driver chip U31 is connected to the port H, a pin 7 of the MOS driver chip U31 is connected to the port L, a pin 8 of the MOS driver chip U31 is grounded, the other end of the second resistor R32 is connected to the gate of the first MOS transistor Q31, the other end of the third resistor R33 is connected to the gate of the second MOS transistor Q32, and the other end of the fourth resistor R828653 is connected to the gate of the fourth transistor Q35, one end of a first resistor R31 is connected with the source electrode of the first MOS tube Q31, the source electrode of the second MOS tube Q32, the source electrode of the third MOS tube Q33 and the pole of the fourth MOS tube Q34, and the other end of the first resistor R31 is connected with the Cath port;

the EN of the MOS tube driving chip U31 is an enabling end, is connected to the EN end of the singlechip and is controlled by the singlechip; the HIN port of the special drive chip U31 for the MOS tube controls the charging time of the storage battery, the LIN port controls the discharging time of the storage battery, namely the discharging time of the negative pulse, the time sequence of the charging and the discharging is shown in figure 8, and the HIN port and the LIN port are connected with the single chip microcomputer through the H, L port and controlled by the single chip microcomputer. The negative pulse discharge can effectively reduce the temperature of the storage battery during charging, effectively solve the depolarization problem of the storage battery plate and reduce the degree of ionized water during charging of the storage battery. Through the time sequence control shown in fig. 8, the charging and repairing can be realized, and the effect that the three-section charging method is complete can be achieved.

Referring to fig. 7, a schematic diagram of a feedback control circuit is shown, which includes resistors R41-R48, capacitors C41-C44, an operational amplifier U41, an optical coupler U42, and a one-way thyristor D41; a PWM control signal from a singlechip is connected with one end of a first resistor R41, the other end of the first resistor R41 is connected with one end of a first capacitor C41 and one end of a second resistor R42, the other end of the second resistor R42 is connected with one end of a second capacitor C42 and a pin 5 of an operational amplifier U41, the other end of the first capacitor C41 is connected with the other end of the second capacitor C42 and a pin 4 of the operational amplifier U41 and then grounded, a pin 1 of the operational amplifier U41 is connected with a working voltage Vcc, a pin 6 and a pin 7 of the operational amplifier U41 are connected, a pin 7 of the operational amplifier U41 is connected with one end of a third resistor R43 and an anode of a unidirectional thyristor D41, the other end of the third resistor R43 is connected with a control electrode of the unidirectional thyristor D41, one end of the third capacitor C43, one end of a fourth capacitor C44, one end of a fifth resistor R45 and a pin 2 of an optical coupler U42, and the other end of a fourth capacitor C44 is connected with a fourth resistor R44, the other end of the third capacitor C43 is connected with the cathode of the unidirectional silicon controlled rectifier D41, the other end of the R44 of the fourth resistor and one end of the sixth resistor R46, the other end of the sixth resistor R46 is connected with the other end of the fifth resistor R45, one end of the seventh resistor R47 and the port Vout, the pin 1 of the optical coupler U42 is connected with the other end of the R47, the pin 3 of the optical coupler U42 is grounded, the optical coupler U42 is connected with one end of the eighth resistor R48, and the other end of the eighth resistor R48 is connected with the COMP port; the model of the operational amplifier U41 is LM358, and the model of the optical coupler U42 is PC 817;

the PWM port of the singlechip is connected to the PWM end of the feedback control circuit, the singlechip outputs PWM waves with adjustable duty ratio, the PWM waves are filtered by the first resistor R41, the second resistor R42, the first capacitor C41 and the second capacitor C42 to become direct current voltage values, and the direct current voltage values are output to the third resistor R43 through the operational amplifier U41 to control the reference potential of the unidirectional silicon controlled rectifier D41 and realize the setting of the voltage Vout. As shown in fig. 7, the feedback control circuit Vout is connected to the secondary Vout of the transformer circuit, and when the primary of the optocoupler emits light more strongly, the feedback signal obtained from the COMP terminal becomes stronger, so as to adjust the PWM duty ratio of the Out output terminal of pin 5 of the U21 PWM controller shown in fig. 5, thereby implementing continuous change of the output voltage value.

The sampling module is used for collecting real-time voltage and current data output to the electric bicycle by the charger, voltage and current data of the electric bicycle and power data, and sampling points are respectively Vout and V-battery two ports as shown in fig. 5. By using the principle that the resistors divide voltage and the amplifier amplifies current and voltage, the sampling of current and voltage data of the two ports can be realized. Connecting the sampling output to an ADC port of the single chip microcomputer shown in FIG. 9 to obtain corresponding current and voltage data, wherein the sampling point Vout is used for collecting real-time current and voltage data output by a charger to the electric bicycle for monitoring the charging process in real time and fitting the basis of the variable voltage intermittent negative pulse charging method shown in FIG. 8; the sampling point V-battery is used for collecting the current and voltage of the electric bicycle and judging the discharge degree of the storage battery of the electric bicycle during negative pulse and the polarization degree of the storage battery.

The single chip microcomputer of the control module adopts STM32F103 series, and part of ports are shown in figure 9, wherein pin 1 is the working voltage of the single chip microcomputer and is connected with +5V, and pin 7 is grounded; pin 2 is a PWM control port, and is connected to the PWM terminal of the feedback control circuit shown in fig. 6 by a PWM wave whose output duty ratio is adjustable;

pins

3 and 4 are respectively connected with the HIN and LIN ends of the negative pulse generating circuit shown in fig. 7, so as to control the time sequence relationship between HIN and LIN; pins 6 and 11 are a serial port receiving end (RX) and a transmitting end (TX) respectively, and are connected to the transmitting end (TX) and the receiving end (RX) of the serial port of the communication module respectively, so that the communication function with the cloud server can be realized through the communication module; the 8 pin is connected to a Relay end shown in fig. 4 to control a Relay switch, and the Relay is closed to charge the electric bicycle; pin 10 is connected to the EN terminal as shown in fig. 6 for controlling its enabling. The data collected and processed by the control module has the conversion result of the ADC, and the data is used for fitting a variable voltage intermittent negative pulse charging method shown in fig. 8, so that the conditions of overload, overcharge, short circuit and the like are avoided, and scientific and rapid charging is realized;

the safety positioning lock control module can also use a single chip microcomputer of the control module shown in fig. 9, and further, the safety positioning lock control module and the control module can adopt a single chip microcomputer integrated design. The corresponding IO port is connected with a motor 7 of the safety positioning lock to control the opening and closing of the motor; and are respectively connected to the sensors 6 as shown in fig. 8 for receiving and processing data of the sensors 6; the data of the sensor is compared with the pressure threshold value 1, the pressure threshold value 2 and the angle threshold value, the vehicle state of the electric bicycle can be monitored, and the charger is integrally matched with the safety positioning lock, so that vehicle safety guarantee is provided.

The communication module adopts common GSM/GPRS modules, such as SIM800C and the like, has strong signals and low energy consumption, and can realize data exchange between the cloud server and the charger. The communication module is connected with the serial port of the control module singlechip, the singlechip data is wirelessly transmitted to the cloud server end through the communication module in a serial port protocol mode, the cloud server data issues data to the charger communication module through the communication platform, and the communication module communicates with the singlechip through serial port connection.

The direct current output module is directly connected with the output end of the voltage transformation circuit and has three outputs, including a charging head and a charging cable. The charging head is a fork-shaped universal T-shaped charging head and a universal round hole, is matched with the charging ports of most electric bicycles on the market, and has strong compatibility; the charging cable is a copper core cable with the diameter of 1.5m, and has good pressure resistance and temperature resistance. The charging cable is of a telescopic structure and is convenient to store. The direct voltage that the machine output charges to the head that charges through charging cable, and the user uses the head that charges to directly insert electric bicycle and charge, avoids the user to use the charger of taking certainly and the potential safety hazard problem that exists.

The system work flow is shown in fig. 10 and 11, a user drives the electric bicycle to enter a charging special parking space, the front wheel of the electric bicycle triggers the safety positioning lock to start working, after the safety positioning lock is locked, the user can send a charging request to the cloud server and connect a charging head of a charger with a charging interface of the electric bicycle, and the cloud server receives the charging request of the user, sends a charging instruction to the intelligent charger and starts charging. In the charging process, the direct-current voltage and current sampling module continuously collects voltage and current data output to the electric bicycle and the electric bicycle, the safety positioning lock collects the data once every 30 seconds, and the data are collected to the control module and used for judging whether the data are normal or not. If the data is abnormal, warning information is sent out immediately, and charging is stopped; otherwise, the charging is continued until the normal charging is finished.

Referring to fig. 12-13, a functional block diagram of a bit security position lock is shown,

this safety positioning lock includes fixed

plate

1, 1 both sides of fixed plate be equipped with respectively and be the backup pad 2 of vertical setting, fixed plate 1 is the level setting, two backup pads 2 are parallel to each other, the thickness of fixed plate 1 equals or is greater than the thickness of backup pad 2 with backup pad 2 thickness.

Secondly, a plurality of mounting and fixing holes 11 are formed in the fixing plate 1, the fixing plate 1 and the supporting plate 2 are respectively made of metal plates, and the fixing plate 1 and the supporting plate 2 are fixed together through welding. The welding can not be easily damaged, so that the electric bicycle is lost.

The distance between two backup pads 2 is 150mm, can hold the wheel width of most electric bicycle on the market, and is compatible strong.

Form the passageway that supplies two rounds or electric tricycle front wheels to get into between two backup pads 2, be connected with the pivot 3 that spanes in the passageway between two backup pads 2, be connected with 3 circumference fixed connection's of pivot wheel locking arched plate 4 and wheel locking arched plate 4's arc locking concave surface 4a up in pivot 3, thereby pivot 3 with can drive its rotation and drive wheel locking arched plate 4 wobbling actuating mechanism 5 and be connected, specifically, actuating mechanism 5 of this embodiment includes driving motor.

A pressure sensor 6 is arranged in one end of the wheel locking arch-shaped plate 4 where the wheel enters, and an angle sensor 7 is arranged on the rotating shaft 3.

The middle of the lower surface of the wheel locking arch-shaped plate 4 is provided with a rotating shaft hole 41 arranged along the width direction of the wheel locking arch-shaped plate 4, the rotating shaft 3 is inserted into the rotating shaft hole 41, and the rotating shaft 3 can rotate relative to the rotating shaft hole 41.

Preferably, the wheel locking arch plate 4 has an arch protrusion 42 protruding downward from the middle of the lower surface thereof and extending along the width direction of the wheel locking arch plate 4, and the rotation shaft hole 41 is provided in the arch protrusion 42.

Specifically, the wheel locking arch plate 4 of the present embodiment includes a lower guide plate 411 and an upper positioning plate 412 connected to one end of the lower guide plate 411, an upper surface of the lower guide plate 411 and an upper surface of the upper positioning plate 412 are smoothly connected to form an arc-shaped locking concave surface 4a, and a bending limit plate 43 is connected to one end of the upper positioning plate 412 away from the lower guide plate 411.

In addition, a contact plane 44 that can be matched with the ground is provided on the lower surface of one end of the lower guide plate 411 away from the upper positioning plate 412.

In this embodiment, the shaft uses a phi 20gcr15 optical axis as a support, and the inner hole of the lower guide 4 is adapted to the size of the shaft. The motor is fixedly arranged on the supporting plate through M5 screws. The lower guide plate is closed at one side close to the motor, is provided with a D-shaped middle hole, and is matched with the motor shaft to conduct the torque of the motor. The pressure sensor is placed inside the lower guide plate and just opposite to the rotating shaft, the pressure sensor comprises a pressure sensor carrying an AD module, the angle sensor 7 comprises an angle sensor carrying the AD module, the sensor outputs digital signals, the digital signals are connected with an IO port of the single-chip microcomputer control module through a lead and are respectively used for detecting pressure data received by the lower guide plate and angle data rotated by the rotating shaft.

The pressure data is compared with the set pressure threshold value 1 through the singlechip control module, so that the common bicycle can be prevented from being mistakenly put into a charging parking space of the electric bicycle; compared with the pressure threshold value 2, the parking space pressure detection device can detect whether the electric bicycle is in the parking space in real time, and guarantees the vehicle safety of the electric bicycle. Compared with the angle threshold value, the rotation of the guide plate under the motor assistance can be opened, the auxiliary electric bicycle enters the wheel locking arch plate 4, the electric bicycle can be neatly parked, after the rotation angle reaches the set threshold value condition, the motor is locked, the guide plate is attached to the front wheel of the electric bicycle, the electric bicycle is difficult to move, and the charging safety of the electric bicycle is guaranteed.

The safety positioning lock comprises a fixing plate 1, wherein supporting plates 2 which are vertically arranged are respectively arranged on two sides of the fixing plate 1, a channel for the front wheel of a two-wheel or three-wheel electric vehicle to enter is formed between the two supporting plates 2, a rotating shaft 3 which stretches across the channel is connected between the two supporting plates 2, a wheel locking arch plate 4 which is fixedly connected with the rotating shaft 3 in the circumferential direction is connected onto the rotating shaft 3, an arc-shaped locking concave surface 4a of the wheel locking arch plate 4 faces upwards, the rotating shaft 3 is connected with a driving mechanism 5 which can drive the rotating shaft to rotate so as to drive the wheel locking arch plate 4 to swing, a pressure sensor 6 is arranged inside one end, into which a wheel of the wheel locking arch plate 4 enters, an angle sensor 7 is arranged on the rotating shaft 3, and the pressure sensor 6 and the angle; the use method of the safety positioning lock comprises the following steps:

s1, the driving mechanism 5 drives the rotating shaft 3 to rotate anticlockwise so as to drive the wheel locking arch-shaped plate 4 to swing synchronously, and the lower surface of one end, into which the wheel enters, of the wheel locking arch-shaped plate 4 is in contact with the ground;

s2, driving the front wheel of the two-wheel or three-wheel electric vehicle into the upper surface of one end of the wheel locking arch-shaped plate 4 for the vehicle wheel to enter, wherein the pressure sensor 6 sends a weight signal to the single-chip microcomputer control module 8 by detecting the weight of the electric vehicle driven into the wheel locking arch-shaped plate 4, when the detected weight signal is the weight signal in the set interval, the single-chip microcomputer control module 8 controls the driving mechanism 5 to drive the rotating shaft 3 to rotate clockwise, so that the wheel locking arch-shaped plate 4 is forced to be separated from the ground upwards, the angle sensor 7 sends a rotating angle signal of the rotating shaft 3 to the single-chip microcomputer control module 8, and then the electric bicycle intelligent charging system is electrically connected with the electric vehicle, namely, the.

The rotation angle of the rotating shaft 3 is less than 270 degrees.

The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intelligent charging method for an electric bicycle is characterized by comprising the following steps:

step S3: detecting whether the charging connection is normal;

2. The intelligent charging method for an electric bicycle according to claim 1, further comprising:

3. The intelligent charging method for the electric bicycle according to claim 1 or 2, wherein in the step S1, a user accesses a cloud server through a mobile terminal and sends a user charging demand instruction, and the cloud server sends the user charging demand instruction to the chargers and controls the corresponding chargers to perform charging operation.

4. The intelligent charging method for the electric bicycle according to claim 1 or 2, wherein in the step S2, the charger determines whether the electric bicycle is parked at a designated position by acquiring sensor information provided on the safety positioning lock, wherein the sensor at least comprises a pressure sensor and an angle sensor.

5. The intelligent charging method for electric bicycles of claim 1 or 2, wherein the charger further comprises an output mechanism, a charging module, a control module, a communication module and a safety positioning lock control module, wherein,

6. The intelligent charging method for electric bicycles of claim 5, wherein the charging module further comprises a power factor correction circuit, a total voltage transformation circuit, a feedback control circuit, and a sampling module, wherein,

7. The intelligent charging method for the electric bicycle according to claim 4, wherein the safety positioning lock is arranged at a designated position and connected with the charger, and is used for executing unlocking or locking operation according to an instruction of the charger;

safety positioning lock further includes fixed plate (1), fixed plate (1) both sides be equipped with backup pad (2) that are vertical setting respectively, form the passageway that supplies two rounds or tricycle electric motor car front wheels to get into between two backup pad (2), be connected with pivot (3) of spaning in the passageway between two backup pad (2), thereby be connected with wheel locking arched plate (4) and the arc locking concave surface (4a) of wheel locking arched plate (4) with pivot (3) circumference fixed connection on pivot (3) up, thereby pivot (3) with can drive its rotation and drive wheel locking arched plate (4) wobbling actuating mechanism (5) and be connected, be equipped with pressure sensor (6) in wheel locking arched plate (4) one end inside that the wheel got into, be equipped with angle sensor (7) in pivot (3).

8. The intelligent charging method for the electric bicycle according to claim 7, wherein a rotating shaft hole (41) arranged along the width direction of the wheel locking dome plate (4) is formed in the middle of the lower surface of the wheel locking dome plate (4), the rotating shaft (3) is inserted into the rotating shaft hole (41), and the rotating shaft (3) can rotate relative to the rotating shaft hole (41).

9. The intelligent charging method for electric bicycles of claim 8, wherein the wheel locking dome (4) has a dome (42) protruding downward from the middle of the lower surface thereof and extending along the width of the wheel locking dome (4), and the spindle hole (41) is formed in the dome (42).

10. The intelligent charging method for the electric bicycle according to claim 9, wherein the wheel locking arch plate (4) comprises a lower guide plate (411) and an upper positioning plate (412) connected to one end of the lower guide plate (411), the upper surface of the lower guide plate (411) and the upper surface of the upper positioning plate (412) are smoothly connected to form an arc-shaped locking concave surface (4a), and a bending limiting plate (43) is connected to one end of the upper positioning plate (412) far away from the lower guide plate (411);

the lower surface of one end of the lower guide plate (411) far away from the upper positioning plate (412) is provided with a contact plane (44) which can be matched with the ground.