CN111884307A - Charging circuit and vehicle charging equipment - Google Patents

Charging circuit and vehicle charging equipment Download PDF

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Publication number
CN111884307A
CN111884307A CN202010642014.9A CN202010642014A CN111884307A CN 111884307 A CN111884307 A CN 111884307A CN 202010642014 A CN202010642014 A CN 202010642014A CN 111884307 A CN111884307 A CN 111884307A
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CN
China
Prior art keywords
transistor
diode
switch
charging
bridge arm
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Pending
Application number
CN202010642014.9A
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Chinese (zh)
Inventor
艾伊昭
王超
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Shenzhen Zhaoheng New Energy Technology Co ltd
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Shenzhen Zhaoheng New Energy Technology Co ltd
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Priority to CN202010642014.9A priority Critical patent/CN111884307A/en
Publication of CN111884307A publication Critical patent/CN111884307A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
    • B60L53/14—Conductive energy transfer
    • B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The application discloses charging circuit and automobile-used battery charging outfit is applied to automobile-used charging technology field for there is the low technical problem who leads to not practical enough of integrated level in solving current charging circuit. The application provides a charging circuit includes AC filter, the circuit breaker, the switch module, the interface module charges, the AC/DC conversion module, a transformer, little the control unit and voltage stabilizing module, little the control unit is connected with the AC/DC conversion module, this AC filter's output interface is connected with the one end of this circuit breaker, the other end of this circuit breaker is connected with this interface module that charges and the input of this AC/DC conversion module respectively, this switch module respectively with this AC filter's output interface, this circuit breaker and this AC/DC conversion module's input are connected, this AC/DC conversion module's output is connected with the input of this transformer, the output of this transformer is connected with this voltage stabilizing module's input, this voltage stabilizing module's output is used for connecting outside rechargeable battery.

Description

Charging circuit and vehicle charging equipment
Technical Field
The application relates to the technical field of charging for vehicles, in particular to a charging circuit and charging equipment for vehicles.
Background
With the popularization of electric vehicles at home and abroad, the vehicle-mounted charging equipment and the charging system of the electric vehicle are in a separated state at present, namely, the electric vehicle is provided with a vehicle-mounted charger, and the charging equipment provides alternating current. The current electric automobile is generally provided with a 3.3KW or 6.6KW equal-power vehicle-mounted charging device, and charging equipment outputs alternating current through a vehicle-mounted charger according to a national standard mode to charge a battery in the automobile.
The following three problems are faced in charging the automobile battery by the vehicle-mounted charger and the charging device in the separated state at present:
firstly, because the vehicle-mounted charger is mounted at the vehicle end, the vehicle-mounted charger needs to be designed according to the vehicle-level standard, and the vehicle-mounted charger needs to cost higher cost for solving the problems of vibration, EMC (electromagnetic compatibility) electromagnetic compatibility test and the like;
the service life of the vehicle-mounted charger and other problems can influence the user experience, the vehicle-mounted charger is not used when the vehicle runs, but runs along with the vehicle during the running process of the vehicle, the unnecessary mass is added to the vehicle, and the electric energy consumption is increased;
third, most of the manufacturers of the charging equipment and the vehicle-mounted charging equipment are different companies, and an alternating current filter is arranged at an alternating current input port of the charging equipment and an alternating current input port of the vehicle-mounted charger.
In summary, it can be seen that there is a technical problem that the integration level is low and the automobile battery is not practical enough when the automobile battery is charged by the present vehicle-mounted charger and charging device in the separated state.
Disclosure of Invention
The embodiment of the application provides a charging circuit and vehicle charging equipment to there is the low technical problem that leads to not practical enough of integrated level in the solution to charging to the car battery through the on-vehicle charger and the charging equipment of current detached state.
According to an aspect of the present invention, there is provided a charging circuit, comprising an ac filter, an input interface of the ac filter for connecting with an external ac power source, a circuit breaker, a switch assembly, a charging interface module, an ac/dc conversion module, a transformer, a micro control unit, and a voltage stabilizing module, the micro control unit is connected with the AC/DC conversion module, the output interface of the AC filter is connected with one end of the circuit breaker, the other end of the circuit breaker is respectively connected with the charging interface module and the input end of the alternating current-direct current conversion module, the switch component is respectively connected with the output interface of the alternating current filter, the circuit breaker and the input end of the alternating current-direct current conversion module, the output end of the AC-DC conversion module is connected with the input end of the transformer, the output end of the transformer is connected with the input end of the voltage stabilizing module, and the output end of the voltage stabilizing module is used for being connected with an external rechargeable battery.
Further, the output interface of the ac filter includes a live line output interface and a neutral line output interface, the circuit breaker includes a first switch K1 and a second switch K2, the first switch K1 and the switch component are connected in parallel between the live line output interface and the ac-dc conversion module, and the second switch K2 is connected to the neutral line output interface and the ac-dc conversion module, respectively.
Further, the switch assembly includes a pre-charge switch K3 and a resistor R, one end of the pre-charge switch K3 is connected to the live wire output interface and one end of the first switch K1, the other end of the pre-charge switch K3 is connected to one end of the resistor R, and the other end of the resistor R is connected to the other end of the first switch K1 and the input end of the ac-dc conversion module.
Further, the first switch K1 and the switch component are connected in parallel to form a first node and a second node, the charging interface module includes a live wire interface and a neutral wire interface, the live wire interface of the charging interface module is connected between the second switch K2 and the second node, and the first node is connected with the live wire output interface.
Further, the ac-dc conversion module includes an inductor L, a first bridge arm converter, a second bridge arm converter, and a first capacitor C1, where the first bridge arm converter, the second bridge arm converter, and the first capacitor are connected in parallel to form a first bus end and a second bus end, the inductor L is connected to the second node and the midpoint of the first bridge arm converter, the second switch K2 is connected to the midpoint of the second bridge arm converter, and the input end of the transformer is connected to the first bus end and the second bus end.
Further, the first bridge arm converter comprises a first transistor and a second transistor, a source of the first transistor is connected with a drain of the second transistor, the second bridge arm converter comprises a third transistor and a fourth transistor, a source of the third transistor is connected with a drain of the fourth transistor, a drain of the first transistor, a drain of the third transistor and one end of the first capacitor C1 are connected in parallel to form the first junction end, a source of the second transistor, a source of the fourth transistor and the other end of the first capacitor C1 are connected in parallel to form the second junction end, and the micro control unit MCU 05 is connected with a gate of the first transistor, a gate of the second transistor, a gate of the third transistor and a gate of the fourth transistor respectively.
Further, the transformer comprises a linear transformer, the first bus end is connected with the positive input end of the linear transformer, and the second bus end is connected with the negative input end of the linear transformer.
Further, the voltage stabilizing module includes a first bridge arm, a second bridge arm and a second capacitor C2, the first bridge arm, the second bridge arm and the second capacitor C2 are connected in parallel to form a third bus end and a fourth bus end, an anode output end of the transformer is connected to a midpoint of the first bridge arm, a cathode output end of the transformer is connected to a midpoint of the second bridge arm, the third bus end is used for connecting an anode of an external rechargeable battery, and the fourth bus end is used for connecting a cathode of the external rechargeable battery.
Further, the first bridge arm includes a first diode, a first resistor, a second diode and a second resistor, the first diode and the first resistor are connected in parallel, the second diode and the second resistor are connected in parallel, the anode of the first diode is connected with the cathode of the second diode, the second bridge arm includes a third diode, a third resistor, a fourth diode and a fourth resistor, the third diode and the third resistor are connected in parallel, the fourth diode and the fourth resistor are connected in parallel, the anode of the third diode is connected with the cathode of the fourth diode, the cathode of the first diode, the cathode of the third diode and one end of the second capacitor C2 are connected together to form the third sink terminal, and the anode of the second diode, the anode of the fourth diode and the other end of the second capacitor C2 are connected together to form the fourth sink terminal.
According to another aspect of the invention, a charging device for a vehicle is provided, which comprises the charging circuit described above.
The application provides a charging circuit and a vehicle charging device, wherein a charging interface module is integrated with an alternating current filter, a circuit breaker, a switch assembly, an alternating current-direct current conversion module, a transformer, a micro control unit and a voltage stabilizing module, an output interface of the alternating current filter is connected with one end of the circuit breaker, an input interface of the alternating current filter is connected with an external alternating current power supply, the other end of the circuit breaker is respectively connected with input ends of the charging interface module and the alternating current-direct current conversion module, the switch assembly is respectively connected with the output interface of the alternating current filter, the circuit breaker and the input end of the alternating current-direct current conversion module, an output end of the alternating current-direct current conversion module is connected with an input end of the transformer, an output end of the transformer is connected with an input end of the voltage stabilizing module, an output end of the voltage stabilizing module is connected with an external charging battery, so that the charging, when the automobile battery needs to be charged, the charging interface module is connected with the automobile end, the output end of the voltage stabilizing module is connected with the rechargeable battery of the automobile, the automobile battery is charged, when the external rechargeable battery does not need to be charged, the automobile charging equipment comprising the charging circuit can be placed independently, and the automobile charging equipment can not be placed on the automobile, so that the electric energy consumption of the automobile can be reduced, the integrated charging circuit and the automobile charging equipment only need to design an alternating current filter at an alternating current access port, the alternating current-direct current conversion module in the charging circuit and the automobile charging equipment can be controlled through a micro control unit, the manufacturing cost is reduced, and the integration level of the charging circuit and the automobile charging equipment is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a block diagram of a charging circuit according to an embodiment of the present disclosure;
fig. 2 is a schematic circuit diagram of a charging circuit according to an embodiment of the present disclosure;
FIG. 3 is a partial schematic view of a charging interface module according to an embodiment of the present application;
fig. 4 is a block diagram of a charging device for a vehicle according to an embodiment of the present application.
Wherein, the components that each mark of the figure shows are as follows:
01. an AC filter; 02. a switch assembly; 03. a circuit breaker; 04. a charging interface module; 05. a Micro Control Unit (MCU); 06. an AC-DC conversion module; 07. a transformer; 08. a voltage stabilization module; 11. a charging circuit; 12. a charging apparatus for a vehicle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Implementations of the present application are described in detail below with reference to the following detailed drawings:
fig. 1 is a block diagram of a charging circuit in an embodiment of the present application, which is described in detail below with reference to fig. 1, and as shown in fig. 1, the charging circuit includes an ac filter 01, an input interface of the ac filter 01 is configured to be connected to an external ac power source, a circuit breaker 03, a switch assembly 02, a charging interface module 04, an ac/dc conversion module 06, a transformer 07, a micro control unit MCU 05, and a voltage stabilizing module 08, the micro control unit MCU 05 is connected to the ac/dc conversion module 06, an output interface of the ac filter 01 is connected to one end of the circuit breaker 03, another end of the circuit breaker 03 is connected to the charging interface module 04 and an input end of the ac/dc conversion module 06, and the switch assembly 02 is connected to the output interface of the ac filter 01, the circuit breaker 03, and an input end of the ac/dc conversion module 06, the output end of the ac/dc conversion module 06 is connected to the input end of the transformer 07, the output end of the transformer 07 is connected to the input end of the voltage stabilizing module 08, and the output end of the voltage stabilizing module 08 is used for connecting an external rechargeable battery.
The charging circuit and the vehicle charging device provided by this embodiment are designed by integrating the charging interface module with the ac filter, the circuit breaker, the switch module, the ac/dc conversion module, the transformer, the micro control unit and the voltage stabilizing module, connecting the output interface of the ac filter with one end of the circuit breaker, connecting the input interface of the ac filter with the external ac power supply, connecting the other end of the circuit breaker with the input ends of the charging interface module and the ac/dc conversion module, connecting the switch module with the output interface of the ac filter, the circuit breaker and the input end of the ac/dc conversion module, connecting the output end of the ac/dc conversion module with the input end of the transformer, connecting the output end of the transformer with the input end of the voltage stabilizing module, connecting the output end of the voltage stabilizing module with the external charging battery, so that the charging interface which is originally in a separate state and the vehicle-mounted charger can be integrated together, when the automobile battery needs to be charged, the charging interface module is connected with the automobile end, the output end of the voltage stabilizing module is connected with the rechargeable battery of the automobile, the automobile battery is charged, when the external rechargeable battery does not need to be charged, the automobile charging equipment comprising the charging circuit can be placed independently, and the automobile charging equipment can not be placed on the automobile, so that the electric energy consumption of the automobile can be reduced, the integrated charging circuit and the automobile charging equipment only need to design an alternating current filter at an alternating current access port, the alternating current-direct current conversion module in the charging circuit and the automobile charging equipment can be controlled through a micro control unit, the manufacturing cost is reduced, and the integration level of the charging circuit and the automobile charging equipment is improved.
Fig. 2 is a schematic circuit structure diagram of a charging circuit in an embodiment of the present application, as shown in fig. 2, an output interface of the ac filter 01 includes a live output interface and a neutral output interface, the circuit breaker 03 includes a first switch K1 and a second switch K2, the first switch K1 and the switch assembly 02 are connected in parallel between the live output interface and the ac-dc conversion module 06, and the second switch K2 is connected to the neutral output interface and the ac-dc conversion module 06, respectively. As shown in fig. 2, the switch assembly 02 includes a pre-charge switch K3 and a resistor R, one end of the pre-charge switch K3 is connected to the live output interface and one end of the first switch K1, the other end of the pre-charge switch K3 is connected to one end of the resistor R, and the other end of the resistor R is connected to the other end of the first switch K1 and the input end of the ac/dc conversion module 06.
Further, the first switch K1 and the switch component 02 are connected in parallel to form a first node and a second node, the charging interface module 04 includes a live wire interface and a neutral wire interface, the live wire interface of the charging interface module 04 is connected between the second switch K2 and the second node, and the first node is connected with the live wire output interface.
A partial schematic diagram of the charging interface module is shown in fig. 3, wherein a live line interface L and a zero line interface N of the charging interface module are used for being connected with the charging circuit in this embodiment, so as to achieve an integrated effect.
The first switch K1 is used as a circuit breaker and also as a main control switch. The pre-charging switch is used for closing the pre-charging switch K3 and opening the first switch K1 when the charging circuit is just connected with the alternating current and the voltage impact is large, and after the circuit is stabilized, the pre-charging switch K3 is opened and the first switch K1 is closed, so that the charging circuit can continuously reach a stable state. The pre-charging switch in the embodiment can improve the safety of the circuit.
The circuit breaker is a hardware circuit breaker and is used for being disconnected when accidents such as electric leakage of the charging circuit occur, and the protection effect is achieved.
In the prior art, because the vehicle-mounted charging device and the external alternating current charging device are designed independently, the filter in the vehicle-mounted charging device and the filter in the external alternating current charging device need to be respectively matched with the corresponding circuit breaker, and the embodiment can realize the leakage protection of the charging circuit by only matching one circuit breaker with the integrated alternating current filter, thereby saving the cost of circuit realization and further improving the integration level of the charging circuit.
In one embodiment, the ac-dc conversion module 06 includes an inductor L, a first bridge arm converter, a second bridge arm converter, and a first capacitor C1, where the first bridge arm converter, the second bridge arm converter, and the first capacitor are connected in parallel to form a first bus terminal S1 and a second bus terminal S2, the inductor L is respectively connected to the second node and the midpoint of the first bridge arm converter, the second switch K2 is connected to the midpoint of the second bridge arm converter, and the input terminal of the transformer 07 is respectively connected to the first bus terminal S1 and the second bus terminal S2.
As shown in fig. 2, the first bridge converter includes a first transistor M1 and a second transistor M2, the source of the first transistor M1 is connected to the drain of the second transistor M2, the second bridge converter includes a third transistor M3 and a fourth transistor M4, the source of the third transistor M3 is connected to the drain of the fourth transistor M4, the drain of the first transistor M1, the drain of the third transistor M3 and one end of the first capacitor C1 are connected in parallel to form the first sink terminal S1, the source of the second transistor M2, the source of the fourth transistor M4 and the other end of the first capacitor C1 are connected in parallel to form the second sink terminal S2, and the micro control unit is respectively connected to the gate of the first transistor M1, the gate of the second transistor M2, the gate of the third transistor M3 and the gate of the fourth transistor M4.
In one embodiment, the first Transistor M1, the second Transistor M2, the third Transistor M3, and the fourth Transistor M4 are all MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) Metal-Oxide-Semiconductor Field-Effect transistors.
In the prior art, because the vehicle-mounted charging device and the external alternating current charging device are designed independently, the vehicle-mounted charging device and the external alternating current charging device need to be respectively matched with the corresponding micro control unit MCU, the transistor in the charging circuit can be controlled through one micro control unit MCU, and the integration level of the charging circuit is further improved.
Optionally, the transformer 07 includes a linear transformer, the first junction S1 is connected to a positive input terminal of the linear transformer, and the second junction S2 is connected to a negative input terminal of the linear transformer.
In one embodiment, the voltage stabilizing module 08 includes a first bridge arm, a second bridge arm, and a second capacitor C2, where the first bridge arm, the second bridge arm, and the second capacitor C2 are connected in parallel to form a third bus terminal S3 and a fourth bus terminal S4, a positive output terminal of the transformer is connected to a midpoint of the first bridge arm, a negative output terminal of the transformer is connected to a midpoint of the second bridge arm, the third bus terminal S3 is used for connecting a positive terminal of an external rechargeable battery, and the fourth bus terminal S4 is used for connecting a negative terminal of the external rechargeable battery.
Wherein, as shown in fig. 2, the first leg comprises a first diode D1, a first resistor, a second diode D2 and a second resistor, the first diode D1 is connected in parallel with the first resistor, the second diode D2 is connected in parallel with the second resistor, the anode of the first diode D1 is connected to the cathode of the second diode D2, the second leg includes a third diode D3, a third resistor, a fourth diode D4 and a fourth resistor, the third diode D3 is connected in parallel with the third resistor, the fourth diode D4 is connected in parallel with the fourth resistor, the anode of the third diode D3 is connected to the cathode of the fourth diode D4, the cathode of the first diode D1, the cathode of the third diode D3 and one end of the second capacitor C2 are connected together to form the third bus terminal S3, the anode of the second diode D2, the anode of the fourth diode D4 and the other end of the second capacitor C2 are connected together to form the fourth bus terminal S4.
Fig. 4 is a block diagram of a charging apparatus for a vehicle according to an embodiment of the present application, and according to another embodiment of the present application, a charging apparatus for a vehicle is provided as shown in fig. 4, and the charging apparatus 12 for a vehicle includes the charging circuit 11.
Alternatively, the vehicle charging apparatus is connected to a component on the vehicle to be charged only at the time of charging.
According to the charging circuit and the vehicle charging equipment, the vehicle-mounted charging equipment (a component unnecessary for vehicle running) and the alternating current charging equipment are integrated, the vehicle-mounted charging equipment is taken away from the vehicle, and the risk of vehicle failure is reduced. And the alternating current-direct current integration battery charging outfit that this application provided no matter install in any position and all can charge to this car when the car needs to charge, convenient maintenance. On the other hand, the vehicle-mounted charger and the charging equipment are controlled by the micro control unit MCU, and the lightning stroke, the surge and the absorption part are realized by sharing one alternating current filter, so that the cost of the charging circuit and the vehicle-mounted charging equipment is further saved.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims (10)

1. A charging circuit comprises an AC filter, an input interface of the AC filter is used for being connected with an external AC power supply, and is characterized by further comprising a circuit breaker, a switch component, a charging interface module, an AC/DC conversion module, a transformer, a micro control unit and a voltage stabilizing module, wherein the micro control unit is connected with the AC/DC conversion module, an output interface of the AC filter is connected with one end of the circuit breaker, the other end of the circuit breaker is respectively connected with the charging interface module and the input end of the AC/DC conversion module, the switch component is respectively connected with the output interface of the AC filter, the circuit breaker and the input end of the AC/DC conversion module, the output end of the AC/DC conversion module is connected with the input end of the transformer, and the output end of the transformer is connected with the input end of the, and the output end of the voltage stabilizing module is used for connecting an external rechargeable battery.
2. The charging circuit of claim 1, wherein the output interface of the ac filter comprises a live output interface and a neutral output interface, the circuit breaker comprises a first switch K1 and a second switch K2, the first switch K1 and the switch assembly are connected in parallel between the live output interface and the ac-dc conversion module, and the second switch K2 is connected to the neutral output interface and the ac-dc conversion module, respectively.
3. The charging circuit of claim 2, wherein the switch assembly comprises a pre-charge switch K3 and a resistor R, one end of the pre-charge switch K3 is connected to the live output interface and one end of the first switch K1, the other end of the pre-charge switch K3 is connected to one end of the resistor R, and the other end of the resistor R is connected to the other end of the first switch K1 and the input end of the ac-dc conversion module.
4. The charging circuit of claim 2, wherein the first switch K1 and the switch component are connected in parallel to form a first node and a second node, the charging interface module comprises a live wire interface and a neutral wire interface, the live wire interface of the charging interface module is connected between the second switch K2 and the second node, and the first node is connected to the live wire output interface.
5. The charging circuit of claim 4, wherein the AC-DC conversion module comprises an inductor L, a first bridge arm converter, a second bridge arm converter and a first capacitor C1, the first bridge arm converter, the second bridge arm converter and the first capacitor are connected in parallel to form a first bus end and a second bus end, the inductor L is respectively connected with the second node and a midpoint of the first bridge arm converter, the second switch K2 is connected with a midpoint of the second bridge arm converter, and an input end of the transformer is respectively connected with the first bus end and the second bus end.
6. The charging circuit of claim 5, wherein the first leg converter comprises a first transistor and a second transistor, a source of the first transistor and a drain of the second transistor are connected, the second leg converter includes a third transistor and a fourth transistor, the source of the third transistor is connected to the drain of the fourth transistor, the drain of the first transistor, the drain of the third transistor and one end of the first capacitor C1 are connected in parallel to form the first bus terminal, the source electrode of the second transistor, the source electrode of the fourth transistor and the other end of the first capacitor C1 are connected in parallel to form the second junction terminal, the micro control unit is respectively connected with the grid electrode of the first transistor, the grid electrode of the second transistor, the grid electrode of the third transistor and the grid electrode of the fourth transistor.
7. The charging circuit of claim 5, wherein the transformer comprises a linear transformer, the first bus terminal is connected to a positive input terminal of the linear transformer, and the second bus terminal is connected to a negative input terminal of the linear transformer.
8. The charging circuit according to claim 1, wherein the voltage stabilizing module comprises a first bridge arm, a second bridge arm and a second capacitor C2, the first bridge arm, the second bridge arm and the second capacitor C2 are connected in parallel to form a third bus end and a fourth bus end, the positive output end of the transformer is connected to the midpoint of the first bridge arm, the negative output end of the transformer is connected to the midpoint of the second bridge arm, the third bus end is used for connecting the positive electrode of an external rechargeable battery, and the fourth bus end is used for connecting the negative electrode of the external rechargeable battery.
9. The charging circuit of claim 8, wherein the first leg comprises a first diode, a first resistor, a second diode, and a second resistor, the first diode and the first resistor are connected in parallel, the second diode and the second resistor are connected in parallel, the anode of the first diode is connected with the cathode of the second diode, the second bridge arm comprises a third diode, a third resistor, a fourth diode and a fourth resistor, the third diode and the third resistor are connected in parallel, the fourth diode and the fourth resistor are connected in parallel, the anode of the third diode is connected with the cathode of the fourth diode, the cathode of the first diode, the cathode of the third diode and one end of the second capacitor C2 are connected in common to form the third junction terminal, the anode of the second diode, the anode of the fourth diode and the other end of the second capacitor C2 are connected in common to form the fourth junction.
10. A charging apparatus for a vehicle, characterized in that it comprises a charging circuit according to any one of claims 1 to 9.
CN202010642014.9A 2020-07-06 2020-07-06 Charging circuit and vehicle charging equipment Pending CN111884307A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112744101A (en) * 2020-12-25 2021-05-04 中国第一汽车股份有限公司 Charging and discharging control system and method and vehicle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112744101A (en) * 2020-12-25 2021-05-04 中国第一汽车股份有限公司 Charging and discharging control system and method and vehicle
CN112744101B (en) * 2020-12-25 2023-02-17 中国第一汽车股份有限公司 Charging and discharging control system and method and vehicle

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