CN115431798A - Charge and discharge control system - Google Patents

Abstract

This paper relates to charge-discharge technical field, especially relates to a charge-discharge control system, includes: the charging seat at least comprises a charging and discharging guide module; the control module of the vehicle control end is in bidirectional data and signal communication with the charge and discharge control box through a CAN bus or an Ethernet; the charge and discharge guide module is in bidirectional data and signal communication with the charge and discharge control box so as to generate a guide signal matched with the charge gun or the discharge gun according to the charge and discharge control signal output by the charge and discharge control box and feed back the guide signal to the charge and discharge control box. According to the charging and discharging control system, the charging and discharging guide module is arranged, so that the charging of the electric automobile can be realized, the discharging of the electric automobile to the electric equipment can also be realized, the charging and discharging control function is independent of the charging seat, the follow-up fault problem is convenient to timely replace, and the whole charging seat is not required to be replaced.

Description

Charge and discharge control system

Technical Field

The document relates to the technical field of charging and discharging, in particular to a charging and discharging control system.

Background

With the rapid development of the automobile industry and the enhancement of the social environmental awareness of people, the development of the new energy automobile industry becomes a key point for solving the shortage of petroleum resources and reducing atmospheric pollution. The supporting electric pile that fills is also a necessary equipment.

The charging pile can be installed in public buildings (public buildings, shopping malls, public parking lots and the like) and residential quarter parking lots or charging stations, and can charge various types of electric vehicles according to different voltage levels. The input end of the charging pile is directly connected with an alternating current power grid, and the output end of the charging pile is provided with a charging plug for charging the electric automobile. In case emergency such as the electric wire netting lacks the electricity, the electric wire netting outage appears, current stake of charging will unable the use. As a mobile distributed energy storage device, an electric vehicle is considerable in the amount of stored electric energy, and therefore, it is a problem to be solved currently to effectively utilize the electric energy in the electric vehicle in an idle state. In addition, the function of controlling charging of the electric automobile is usually integrated in the charging seat, and if the control chip is damaged or has other faults, the charging seat can only be replaced, so that the maintenance cost is high.

Disclosure of Invention

In order to solve the problems in the prior art, the embodiment herein provides a charge and discharge control system for solving the problem of power shortage caused by the fact that a charging pile cannot be used under the condition of power shortage of a power grid in the prior art and the problem of overhigh maintenance cost caused by damage of a control function of an electric vehicle.

Provided herein is a charge and discharge control system including:

the charging seat at least comprises a charge-discharge guide module;

a charge and discharge control box;

the control module of the vehicle control end is in bidirectional data and signal transmission with the charge and discharge control box through a CAN bus or an Ethernet;

the charge and discharge guide module is in bidirectional data and signal communication with the charge and discharge control box so as to generate a guide signal matched with the charge gun or the discharge gun according to the charge and discharge control signal output by the charge and discharge control box and feed back the guide signal to the charge and discharge control box.

Preferably, the charging stand further comprises a protection circuit, an input end of the protection circuit is connected with an output end of a power supply module of the vehicle control end, and an output end of the protection circuit is connected with an input end of the charge and discharge control box and used for filtering common-mode interference signals and outputting stable voltage to the charge and discharge control box.

Preferably, the charging seat further comprises a protection circuit, an input end of the protection circuit is connected with an output end of a power supply module of the vehicle control end, and an output end of the protection circuit is connected with an input end of the charge and discharge control box and used for filtering interference signals and then outputting stable voltage to the charge and discharge control box.

Preferably, the protection circuit comprises a current backflow prevention module, a common mode filtering module and a differential mode filtering module, the current backflow prevention module receives the direct current input voltage of the power supply module and transmits the direct current input voltage to the common mode filtering module and the differential mode filtering module, and the common mode filtering module is used for isolating common mode interference between a power supply loop of the power supply module and a control loop of the charging stand and a control loop of the charging control box; the differential mode filtering module is used for isolating differential mode interference between a power supply loop of the power supply module and a control loop of the charging seat and a control loop of the charging control box, and outputting direct current stabilized voltage meeting preset requirements.

Preferably, the protection circuit further comprises an EMC filter module, the EMC filter module is connected between the common mode filter module and the differential mode filter module, and the EMC filter module is used for absorbing high-frequency noise of at least one of a power supply loop of the power supply module, a control loop of the charging dock, and a control loop of the charging control box.

Preferably, the differential mode filtering module includes a first inductor, the common mode filtering module includes a common mode inductor, a first end of the common mode inductor is connected to the output end of the current backflow preventing module, a second end of the common mode inductor is connected to a power ground, a third end of the common mode inductor is connected to the first inductor, a fourth end of the common mode inductor is connected to the power ground, and the other end of the first inductor is used for outputting a dc stabilization voltage.

Preferably, the EMC filter module includes a first capacitor, a second capacitor, a third capacitor and a fourth capacitor, one end of the first capacitor and the third capacitor connected in parallel is connected between the third end of the common mode inductor and the first inductor, and the other end is connected to a protective ground; one end of the second capacitor and one end of the fourth capacitor after being connected in parallel are connected with a protective ground, and the other end of the second capacitor and the fourth capacitor are connected with a power ground.

Preferably, a pre-stage filter circuit is further disposed between the current backflow prevention module and the common mode filter module, the pre-stage filter circuit includes M pre-stage filter capacitors, one end of each pre-stage filter capacitor is connected to the first end of the common mode inductor, and the other end of each pre-stage filter capacitor is connected to a power ground, where M is greater than or equal to 2.

Preferably, a post-stage filter circuit is further disposed behind the differential mode filter module, the post-stage filter circuit includes N post-stage filter capacitors, one end of each post-stage filter capacitor is connected to a power ground, and the other end of each post-stage filter capacitor is connected to the other end of the first inductor, where N is greater than or equal to 4.

Preferably, the charge and discharge guidance module comprises a vehicle-to-load discharge control guidance circuit and a charge guidance circuit.

Preferably, the output end of the vehicle-to-load discharge control guide circuit is connected with the discharge gun; the input end of the charging guide circuit is connected with the charging gun.

Utilize this paper embodiment, through set up the charge and discharge guide module in the charging seat, the control signal generation of the charge and discharge that matches with the rifle or the rifle that discharges according to the charge and discharge of charge and discharge control box output realizes the charging process to electric automobile or realizes electric automobile to the process of discharging of external load to the charge and discharge control box is independent of the charging seat setting, and the follow-up trouble problem of being convenient for in time changes, and need not to change whole charging seat, has reduced cost of maintenance. Besides the charging and discharging control process, the rest of the control of the charging and discharging state indicator lamp, the socket lock and the cover lock are realized by the charging and discharging control box, the information fed back by each controlled component CAN be uploaded to the vehicle CAN bus in time, and the control process CAN be completed efficiently and quickly. Finally, the protection circuit in the charge and discharge control system can minimize the interference of the power supply module on the EMC characteristics of the control circuit of the system and even the whole vehicle, and simultaneously integrates the functions of reverse connection prevention and short circuit prevention protection, thereby ensuring the working stability of the system.

Drawings

In order to more clearly illustrate the embodiments or technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic block diagram of a charge and discharge control system according to an embodiment of the present disclosure.

Fig. 2 is a schematic block diagram of a charge and discharge control system according to a preferred embodiment of the present disclosure.

Fig. 3 is a vehicle-to-load discharge (V2L) control guidance circuit in the charge and discharge guidance module shown in fig. 2.

Fig. 4 is a circuit schematic of the protection circuit shown in fig. 2.

Fig. 5 is a circuit schematic diagram of the DC-DC conversion circuit shown in fig. 2.

Fig. 6 is a circuit schematic of the latch driver circuit.

[ instruction of reference ]

100. A charging seat; u8, a voltage stabilizing module;

101. a charge and discharge control box; q5, a first field effect transistor;

103. a charge and discharge guide module; r133 and a fifth resistor;

104. a protection circuit; r152 and a sixth resistor;

105. a DC-DC conversion circuit; r103 and a seventh resistor;

106. a cover lock; r132, eighth resistance;

107. a cover lock state detection module; c60, an eleventh capacitor;

108. a socket lock; c47, twelfth capacitor;

109. a socket lock state detection module; c33, a thirteenth capacitor;

110. a lighting circuit; c45, a fourteenth capacitance;

111. a status indication circuit; l5 and a fifth inductor;

112. a direct current power supply anode temperature detection device; d8, an eighth diode;

113. a DC power supply cathode temperature detection device; u9 and a motor chip;

200. a vehicle control end; q14, a second field effect transistor;

201. a power supply module; q15, a triode;

301. a charging gun; r95, tenth resistance;

302. a discharge gun; r96, eleventh resistance;

d3, a third diode; r97 and a ninth resistor;

d1, a first diode; c35, a fifteenth capacitor;

CW1, a first capacitor; c7, a seventh capacitor;

CW2, a second capacitor; c8, an eighth capacitor;

CW3, a third capacitance; c9, ninth capacitor;

CW4, a fourth capacitor; c10, tenth capacitance;

c5, a fifth capacitor; l2, common mode inductance;

c6, a sixth capacitor; l1 and a first inductor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments herein without making any creative effort, shall fall within the scope of protection.

As shown in fig. 1 and 2, a charge and discharge control system includes: the charging seat 100 at least comprises a charging and discharging guide module 103, and the control module of the vehicle control end 200 is in bidirectional data and signal communication with the charging and discharging control box 101 through a CAN bus or an Ethernet; the charge and discharge guidance module 103 bidirectionally communicates data and signals with the charge and discharge control box 101 to generate a guidance signal matched with the charge gun 301 or the discharge gun 302 according to the charge and discharge control signal output from the charge and discharge control box 101 and to feed back the guidance signal to the charge and discharge control box 101.

From this, through setting up charge and discharge guide module 103, generate the guide signal that matches with rifle 301 or the rifle 302 that discharges according to the charge and discharge control signal of charge and discharge control box 101 output, realize the charging process to electric automobile or realize electric automobile to the process of discharging of external load to charge and discharge control box 101 is independent of charging seat 100 setting, and the follow-up trouble problem of being convenient for in time changes, and need not to change whole charging seat 100, has reduced cost of maintenance. In addition, except for the charging and discharging control process, the rest of the control of the charging and discharging state indicator lamp, the socket lock and the cover lock are realized by the charging and discharging control box 101, the information fed back by each controlled component CAN be uploaded to the vehicle CAN bus in time, and the control process CAN be completed efficiently and quickly.

Specifically, in some embodiments, the charge and discharge guidance module 103 includes a vehicle-to-load discharge control guidance circuit and a charge guidance circuit.

Fig. 3 shows a vehicle-to-load discharge (V2L) control pilot circuit. As shown in fig. 3, the V2L circuit may be composed of a discharging vehicle control device, a bidirectional vehicle-mounted charger, an insulation monitoring device, a resistor R1, a resistor R2, a resistor R3, a resistor R2', a resistor R3', a resistor R4', a resistor RC', a switch S1, a switch S2', a switch S3', a switch S4, an intelligent load control device, and the like, wherein the discharging vehicle control device may be integrated in the bidirectional vehicle-mounted charger or the charging and discharging control box 101 (e.g., MCU) of fig. 2.

The discharging vehicle control device judges whether the vehicle plug is completely connected with the vehicle socket or not by measuring the resistance value between the detection point 3' and the PE, judges whether the discharging state is allowed or not by the voltage of the detection point 2' after the complete connection, and switches the switch S4 to the output state and enters the discharging mode after the voltage of the detection point 2' is less than 1V and the alternating current V2L set by an operator is obtained for discharging.

In some embodiments, the charge control guidance circuit may employ GBT 18487.1-2015 part 1 of electric vehicle conduction charging system: charge control pilot circuit in general requirements. The charging control guidance circuit can control the connection confirmation of the interface between the charging gun 301 and the charging stand 100, the self-check of the off-board charger, and the charging voltage matching problem, and charge the vehicle control terminal 200 according to the predetermined charging requirement.

In some embodiments, the output of the vehicle-to-load discharge control pilot circuit is connected to the discharge gun 302; the input end of the charging guide circuit is connected with the charging gun 301. It is understood that after entering the discharging mode, the power of the vehicle control terminal 200 is provided to the discharging load via the discharging gun 302, and after entering the charging mode, the power of the off-board charger is provided to the charging dock 100 and then to the vehicle control terminal 200 via the charging gun 301.

In some embodiments, the charging dock 100 further includes a protection circuit 104, an input end of the protection circuit 104 is connected to an output end of the power supply module 201 of the vehicle control end 200, and an output end of the protection circuit 104 is connected to an input end of the charge and discharge control box 101, and is configured to filter an interference signal and output a stable voltage to the charge and discharge control box 101.

Specifically, as shown in fig. 4, there is provided a protection circuit 104 including: the device comprises a current backflow prevention module, a common mode filtering module and a differential mode filtering module.

Specifically, the current backflow prevention module receives the direct-current input voltage of the power supply module 201 and transmits the direct-current input voltage to the common-mode filtering module and the differential-mode filtering module, and the common-mode filtering module is used for isolating common-mode interference between a power supply loop of the power supply module 201 and a control loop of the charging stand 100 and a control loop of the charging control box 101; the differential mode filtering module is used for isolating differential mode interference between a power supply loop of the power supply module 201 and a control loop of the charging seat 100 and a control circuit of the charging control box 101, and outputting direct current stabilized voltage meeting a preset requirement.

Further, in some embodiments, the protection circuit 104 further includes an EMC filter module, the EMC filter module is connected between the common mode filter module and the differential mode filter module, and the EMC filter module is configured to absorb high-frequency noise of at least one of the power supply loop of the power supply module 201, the control loop of the charging cradle 100, and the control loop of the charging control box 101.

Specifically, as shown in fig. 4, the differential-mode filtering module includes a first inductor L1, the common-mode filtering module includes a common-mode inductor L2, a first end of the common-mode inductor L2 is connected to the output end of the current backflow preventing module, a second end of the common-mode inductor L2 is connected to the power ground, a third end of the common-mode inductor L2 is connected to the first inductor L1, a fourth end of the common-mode inductor L2 is connected to the power ground, and another end of the first inductor L1 is used for outputting a dc stabilizing voltage.

Specifically, as shown in fig. 4, the EMC filter module includes a first capacitor CW1, a second capacitor CW2, a third capacitor CW3 and a fourth capacitor CW4, one end of the first capacitor CW1 and the third capacitor CW3 connected in parallel is connected between the third end of the common-mode inductor L2 and the first inductor L1, and the other end is connected to a protective ground; one end of the second capacitor CW2 and the fourth capacitor CW4 connected in parallel is connected to the protection ground, and the other end is connected to the power ground.

Furthermore, a preceding stage filter circuit can be arranged between the current backflow prevention module and the common mode filter module, the preceding stage filter circuit comprises M preceding stage filter capacitors, one end of each preceding stage filter capacitor is connected with the first end of the common mode inductor, the other end of each preceding stage filter capacitor is connected with a power ground, and M is larger than or equal to 2. For example, 2 or 3 or 4 pre-stage filter capacitors may be connected in parallel between the common mode inductor and the power ground. In this embodiment, the pre-filter capacitor includes a fifth capacitor C5 and a sixth capacitor C6.

It is understood that the number of the pre-stage filter capacitors may be set according to actual requirements, and is not particularly limited herein.

Furthermore, a post-stage filter circuit is arranged behind the differential mode filter module and comprises N post-stage filter capacitors, one end of each post-stage filter capacitor is connected with a power ground, the other end of each post-stage filter capacitor is connected with the other end of the first inductor L1, and N is larger than or equal to 4. For example, 4 or 5 or more post-stage filter capacitors may be connected in parallel after the differential-mode filter module and before the output of the regulated voltage. In this embodiment, the post-stage filter capacitor includes a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, and a tenth capacitor C10.

It is to be understood that the number of the post-stage filter capacitors may be set according to actual requirements, and is not particularly limited herein.

In some embodiments, the cradle 100 further comprises a DC-DC conversion circuit 105, an input terminal of the DC-DC conversion circuit 105 is connected to the protection circuit 104 and an output terminal of the charging and discharging control box 101, and an output terminal of the DC-DC conversion circuit 105 is connected to an input terminal of the charging and discharging guidance module 103. The DC-DC conversion circuit 105 is used to convert the 9V-16V operating voltage of the charge and discharge control box 101 into a 12V supply voltage.

Specifically, as shown in fig. 5, the DC-DC conversion circuit includes:

the voltage stabilizing module U8 is configured to receive power of the power supply module 201 after passing through the protection circuit 104, and has a plurality of pins;

the filter circuit is connected with an input pin of the voltage stabilizing module U8 and is used for filtering noise fluctuation of power supply electric power to obtain direct-current voltage;

the pulse switch circuit is used for receiving a conducting signal of a driving pin of the voltage stabilizing module U8 and generating pulse voltage;

and the coupling rectifying circuit is connected with the pulse switch circuit and is used for coupling the pulse voltage and the direct-current voltage and rectifying the pulse voltage and the direct-current voltage into a guide voltage.

The voltage stabilizing module U8 is an eight-pin chip, the voltage stabilizing module U8 can be an LM3488 type chip of a Texas instrument, the working voltage of the chip is 3V-40V, and the eight pins of the voltage stabilizing module are respectively a current detection pin 1, a compensation pin 2, a feedback pin 3, an analog ground pin 4, a power ground pin 5, a driving pin 6, an enabling pin 7 and an input pin 8 according to the sequence of rotating from the left upper counterclockwise.

The voltage stabilizing module U8 can receive the voltage reduced by the automobile power battery, and can also be a small storage battery/battery from the automobile except the automobile power battery, and the small storage battery/battery can be equipment for supplying power to additional equipment of a new energy automobile, such as additional equipment of a sound, a navigator, an air conditioner or a lamp.

In the coupling process, a technical means of overlapping pulse voltage with the voltage after the protection circuit 104 is utilized, that is, after the direct-current voltage obtained by a filter circuit (see the filter circuit composed of capacitors C43 and C44 and an inductor L4 in fig. 5) and the pulse voltage obtained by a pulse switching circuit are coupled and rectified, a pilot voltage is obtained, but after the current pilot voltage is coupled by the pulse voltage once, the 12V pilot voltage required by the charging pile is not necessarily satisfied, therefore, further, the DC-DC conversion circuit may further include a voltage division circuit (for example, a plurality of resistors are connected in series for voltage division), so that the voltage is divided by the voltage division circuit and fed back to the feedback pin 3, and in the voltage stabilization module, the feedback pin 3 and the driving pin 6 have a corresponding relationship, that the voltage received by the feedback signal is increased or decreased, the voltage output by the driving pin 6 has a corresponding frequency change, the duty ratio of the pulse voltage can be affected by the frequency change, so that at each clock, the pilot voltage can be continuously adjusted until the required 12V pilot voltage is obtained, and the frequency of the charging pile can be controlled by the clock pin 7, and the pulse voltage can be obtained within a short time.

In some embodiments, as shown in fig. 5, the pulse switching circuit includes a first field effect transistor Q5 and a fifth resistor R133; the drain electrode of the first field effect transistor Q5 is connected with the output end of the filter circuit, the grid electrode of the first field effect transistor Q5 is connected with the driving pin 6, the source electrode of the first field effect transistor Q5 is connected with one end of the fifth resistor R133, and the other end of the fifth resistor R133 is grounded.

It should be noted that, the model of the first field effect transistor Q5 is DMN6140, and the gate of the first field effect transistor Q5 is connected to the driving pin 6, so that pulse voltages with different duty ratios can be output according to signals sent by the driving pin 6.

In some embodiments, the DC-DC conversion circuit further includes an eleventh capacitor C60, a sixth resistor R152, a twelfth capacitor C47, and a seventh resistor R103, where the eleventh capacitor C60 and the sixth resistor R152 form a low pass filter and are connected between the gate of the first fet Q5 and the driving pin 6, one end of the seventh resistor R103 is connected between the source of the first fet Q5 and the fifth resistor R133, the other end of the seventh resistor R103 is connected to the twelfth capacitor C47, a connection position of the twelfth capacitor C47 and the seventh resistor R103 is connected to the current detection pin 1 of the voltage regulation module U8, and the other end of the twelfth capacitor C47 is grounded.

And the current detection pin 1 is used for detecting the working current of the first field effect transistor Q5.

It should be noted that the current detection pin 1 can accurately obtain the working current of the first field-effect transistor Q5, and then obtain the working voltage of the first field-effect transistor Q5 according to the resistance of the seventh resistor R103, so that a maintainer of the new energy vehicle can conveniently obtain the working condition of the first field-effect transistor Q5, and the maintenance is convenient.

In some embodiments, the coupling rectification circuit includes a thirteenth capacitor C33, a fifth inductor L5, and an eighth diode D8; one end of the thirteenth capacitor C33 is connected to the drain of the first field effect transistor Q5, the other end is connected to one end of the fifth inductor L5, and the other end of the fifth inductor L5 is grounded; the connecting position of the thirteenth capacitor C33 and the fifth inductor L5 is connected to the anode of the eighth diode D8, and the cathode of the eighth diode D8 is connected to the feedback pin 3 of the voltage regulator module U8.

It should be noted that the coupling rectification circuit herein has a coupling rectification function, but is only the simplest coupling rectification circuit, and a person skilled in the art may adjust the device matching of the coupling rectification circuit according to the pricing of the new energy vehicle, and the model of the eighth diode D8 (for example, a schottky diode), where the model of the schottky diode is MBRS130LT3, and after the vehicle battery power supply is filtered, the vehicle battery power supply is already a stable dc voltage, so that only the thirteenth capacitor C33 and the fifth inductor L5 need to be coupled, a positive and negative alternating pulse voltage greater than the output of the first field-effect transistor Q5 can be obtained, and after obtaining such pulse voltage, a unidirectional filter device of a unidirectional bridge type is passed through, and a schottky diode is selected for unidirectional filtering.

In some embodiments, a radiation-resistant circuit is further arranged between the pulse switch circuit and the coupling rectification circuit;

the radiation-resistant circuit comprises an eighth resistor R132 and a fourteenth capacitor C45;

one end of the eighth resistor R132 is disposed between the drain of the first field effect transistor Q5 and the thirteenth capacitor C33, the other end of the eighth resistor R132 is connected to one end of the fourteenth capacitor C45, and the other end of the fourteenth capacitor C45 is connected to the other end of the fourteenth capacitor C45.

It should be noted that the anti-radiation circuit is designed to prevent the magnetic field caused by the continuous pulse voltage from possibly affecting the internal devices of the new energy automobile, so that the anti-radiation circuit is added to reduce the electromagnetic interference of the circuit itself to the outside.

In some embodiments, the cradle further comprises a cradle lock 108 and a lock driving circuit, the lock driving circuit is integrated in the charge and discharge control module 203, and the charge and discharge control module 203 controls whether the protection circuit 104 outputs a stable voltage to the lock driving circuit, so as to control the forward rotation and the reverse rotation of the cradle lock 108.

It can be understood that the charging and discharging control module 203 controls whether the protection circuit 104 outputs the stable voltage to the lock driving circuit, when it is determined that the new energy vehicle is in the non-charging state or the discharging state, the charging and discharging control module 203 may suspend outputting the on-state control signal to the switching tube in the lock driving circuit, so that the switching tube is in the off state, and thus the switching tube cuts off the power supply of the lock driving circuit, and the lock driving circuit stops working, thereby saving the power consumption of the new energy vehicle in the non-charging state or the discharging state, in which the charging and discharging control module 203 still outputs the on-state control signal to the lock driving circuit, and in which the lock driving circuit is still in the standby state, and reducing the power consumption of the vehicle-mounted power supply module of the new energy vehicle in the non-charging state.

In some embodiments, the cradle 100 may further include a cover lock 106, and the charge and discharge control module 203 controls whether the protection circuit 104 outputs a stable voltage to the lock driving circuit, so as to control the forward rotation and the reverse rotation of the cover lock 106.

It will be appreciated that the socket lock 108 and the cover lock 106 are controlled simultaneously by the same lock drive circuit.

Specifically, as shown in fig. 6, a lock driving circuit is provided.

In fig. 6, the lock driving circuit includes a motor chip U9 and a power supply driving module. The motor chip U9 herein is an eight-pin chip, and the eight pins are a ground pin 01, a reverse rotation input pin 02, a forward rotation input pin 03, an enable pin 04, a power supply pin 05, a forward rotation output pin 06, a feedback pin 07, and a reverse rotation output pin 08, respectively, in order of counterclockwise rotation from the upper left.

The output end of the power supply driving module is connected with a power supply pin of the motor chip U9, a forward rotation input pin and a reverse rotation input pin of the motor chip U9 are connected with a signal output end of the charge and discharge control module 203, and a forward rotation output pin and a reverse rotation output pin of the motor chip U9 are used for connecting the socket lock 108 and/or the cover lock 106.

Specifically, the power supply driving module comprises a second field effect transistor Q14 and a triode Q15, a drain of the second field effect transistor Q14 is connected with an output end of the protection circuit 104, a source of the second field effect transistor Q14 is connected with a power supply pin 05 of the motor chip U9, a gate of the second field effect transistor Q14 is connected with a collector of the triode Q15, an emitter of the triode Q15 is connected with the ground, and a base of the triode Q15 is connected with a power supply control signal output end of the charge and discharge control module 203.

When the charging and discharging control module 203 stops outputting the conduction control signal to the switching tube in the lock driving circuit, the triode Q15 and the second field effect tube Q14 are in a cut-off state, so that the switching tube cuts off the power supply of the lock driving circuit, and the lock driving circuit stops working; when the charging and discharging control module 203 outputs a conducting control signal to a switching tube in the lock driving circuit, the triode Q15 and the second field effect tube Q14 are in a conducting state, the power supply module 201 supplies power to the lock driving circuit through the protection circuit 104, the lock driving circuit starts to work, and the charging and discharging control module 203 can control the forward rotation and the reverse rotation of the socket lock 108 or the cover lock 106.

As shown in fig. 6, the lock driving circuit further includes a tenth resistor R95 and an eleventh resistor R96, one end of the tenth resistor R95 is connected to the feedback pin 07 of the motor chip U9, the other end of the tenth resistor R95 is connected to the signal input end of the charge and discharge control module 203, one end of the eleventh resistor R96 is connected between the feedback pin 07 and the tenth resistor R95, and the other end of the eleventh resistor R96 is grounded.

Therefore, the feedback pin 07 of the motor chip U9 is connected with the signal input end of the charging and discharging control module 203, so that the first driving current in the locking process of the electronic lock (the cover lock 106 or the socket lock 108 and the like) can be obtained, the state of the electronic lock is judged according to the first driving current, and by the mode, the locking condition of a charging plug or a discharging plug of a user of the new energy automobile can be informed, the virtual connection of the charging plug or the discharging plug is avoided, and the charging and discharging quality of the new energy automobile is ensured.

In order to highlight the feedback function, fig. 2 shows a simplified configuration of components corresponding to the feedback function as a cover lock state detection module 107 and a socket lock state detection module 109. It is understood that in other embodiments, the cover lock state detection module 107 and the socket lock state detection module 109 may be a single device such as a current meter rather than a detection circuit.

In some embodiments, the lock driving circuit further includes an enabling module, the enabling module includes a ninth resistor R97 and a fifteenth capacitor C35, one end of the ninth resistor R97 is connected to the positive electrode of the power supply, the other end of the ninth resistor R97 is connected to the fifteenth capacitor C35, the other end of the fifteenth capacitor C35 is connected to ground, and a connection position of the ninth resistor R97 and the fifteenth capacitor C35 is connected to the enabling pin 04 of the motor chip U9. Therefore, the normal working state of the motor chip U9 is guaranteed through the enabling module.

In some embodiments, the charging dock 100 further includes an illumination circuit 110, an input terminal of the illumination circuit 110 is connected to an output terminal of the charge and discharge control box 101, and the charge and discharge control box 101 sends an illumination driving signal to the illumination circuit 110 according to a control signal of the control module. In particular, the lighting circuit 110 may be a control circuit comprising an LED lamp.

In some embodiments, the charging dock 100 further includes a status indication circuit 111, an input terminal of the status indication circuit 111 is connected to an output terminal of the charge and discharge control box 101, and the charge and discharge control box 101 sends a status indication conducting signal to the status indication circuit 111 according to a control signal of the control module. Specifically, the status indication circuit 111 may be a control circuit including various status indication lamps and a display screen to indicate information such as electric quantity, current, voltage, etc. during charging and discharging.

In some embodiments, the charging dock 100 further includes a dc power positive temperature detection device 112 and a dc power negative temperature detection device 113, and output terminals of the dc power positive temperature detection device 112 and the dc power negative temperature detection device 113 are connected to input terminals of the charging and discharging control box 101. The charge and discharge control box 101 may control the charge and discharge power, the charge and discharge time period, and the like in the charge and discharge process according to the temperatures detected by the two temperature detection devices.

Specifically, both the dc power supply positive electrode temperature detecting means 112 and the dc power supply negative electrode temperature detecting means 113 may be NTC temperature sensors.

According to the charge and discharge control system, the charge and discharge guide module is arranged in the charging seat, the guide signal matched with the charge gun or the discharge gun is generated according to the charge and discharge control signal output by the charge and discharge control box, the charge process of the electric automobile or the discharge process of the electric automobile to an external load is realized, the charge and discharge control box is independent of the charging seat, the subsequent fault problem is convenient to timely replace, the whole charging seat does not need to be replaced, and the maintenance cost is reduced. Besides the charging and discharging control process, the rest of the control of the charging and discharging state indicator lamp, the socket lock and the cover lock are realized by the charging and discharging control box, the information fed back by each controlled component CAN be uploaded to the vehicle CAN bus in time, and the control process CAN be completed efficiently and quickly. Finally, the protection circuit in the charging and discharging control system can minimize the interference of the power supply module on the control circuit of the system and even the EMC characteristics of the whole vehicle, and simultaneously integrates the functions of reverse connection prevention and short circuit prevention protection, thereby ensuring the working stability of the system.

It should be understood that, in various embodiments herein, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments herein.

It should also be understood that, in the embodiments herein, the term "and/or" is only one kind of association relation describing an associated object, and means that there may be three kinds of relations. For example, a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electrical, mechanical or other form of connection.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the embodiments herein.

In addition, functional units in the embodiments herein may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present invention may be implemented in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods of the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

The principles and embodiments of this document are explained herein using specific examples, which are presented only to aid in understanding the methods and their core concepts; meanwhile, for the general technical personnel in the field, according to the idea of this document, there may be changes in the concrete implementation and the application scope, in summary, this description should not be understood as the limitation of this document.

Claims (10)

1. A charge-discharge control system, characterized by comprising:

the charging seat at least comprises a charging and discharging guide module;

a charge and discharge control box;

the control module of the vehicle control end is in bidirectional data and signal communication with the charge and discharge control box through a CAN bus or an Ethernet;

the charge and discharge guide module is in two-way data and signal communication with the charge and discharge control box so as to generate a guide signal matched with the charge gun or the discharge gun according to the charge and discharge control signal output by the charge and discharge control box and feed back the guide signal to the charge and discharge control box.

2. The charging and discharging control system according to claim 1, wherein the charging dock further comprises a protection circuit, an input terminal of the protection circuit is connected to an output terminal of a power supply module of the vehicle control terminal, and an output terminal of the protection circuit is connected to an input terminal of the charging and discharging control box, and is configured to filter an interference signal and output a stable voltage to the charging and discharging control box.

3. The charging and discharging control system of claim 2, wherein the protection circuit comprises a current backflow prevention module, a common mode filter module and a differential mode filter module, the current backflow prevention module receives the dc input voltage of the power supply module and transmits the dc input voltage to the common mode filter module and the differential mode filter module, and the common mode filter module is configured to block common mode interference between the power supply loop of the power supply module and the control loops of the charging cradle and the charging control box; and the differential mode filtering module is used for cutting off differential mode interference among a power supply loop of the power supply module, a control loop of the charging stand and a control loop of the charging control box and outputting direct current stabilized voltage meeting the preset requirement.

4. The charging and discharging control system according to claim 3, wherein the protection circuit further comprises an EMC filter module connected between the common mode filter module and the differential mode filter module, the EMC filter module is configured to absorb high frequency noise of at least one of a power supply loop of the power supply module, a control loop of the charging cradle, and a control loop of the charging control box.

5. The charging and discharging control system according to claim 4, wherein the differential mode filtering module comprises a first inductor, the common mode filtering module comprises a common mode inductor, a first end of the common mode inductor is connected to the output end of the current backflow prevention module, a second end of the common mode inductor is connected to a power ground, a third end of the common mode inductor is connected to the first inductor, a fourth end of the common mode inductor is connected to the power ground, and the other end of the first inductor is used for outputting a DC stabilized voltage.

6. The charge and discharge control system according to claim 5, wherein the EMC filter module comprises a first capacitor, a second capacitor, a third capacitor and a fourth capacitor, one end of the first capacitor and the third capacitor connected in parallel is connected between a third end of the common mode inductor and the first inductor, and the other end of the first capacitor and the third capacitor is connected to a protective ground; one end of the second capacitor and one end of the fourth capacitor after being connected in parallel are connected with a protective ground, and the other end of the second capacitor and the fourth capacitor are connected with a power ground.

7. The charging and discharging control system according to claim 5, wherein a pre-filter circuit is further disposed between the current backflow prevention module and the common mode filter module, the pre-filter circuit includes M pre-filter capacitors, one end of the pre-filter capacitor is connected to the first end of the common mode inductor, and the other end of the pre-filter capacitor is connected to a power ground, wherein M is greater than or equal to 2.

8. The charge and discharge control system according to claim 5, wherein a post-stage filter circuit is further disposed behind the differential mode filter module, the post-stage filter circuit includes N post-stage filter capacitors, one end of each post-stage filter capacitor is connected to a power ground, the other end of each post-stage filter capacitor is connected to the other end of the first inductor, and N is greater than or equal to 4.

9. The charge and discharge control system of claim 1 wherein the charge and discharge guidance module comprises a vehicle-to-load discharge control guidance circuit and a charge guidance circuit.

10. The charging and discharging control system according to claim 9, wherein the output terminal of the vehicle-to-load discharging control pilot circuit is connected to the discharging gun; the input end of the charging guide circuit is connected with the charging gun.

Images