CN210468877U - Charging and discharging circuit and vehicle-mounted charging and discharging system - Google Patents
Charging and discharging circuit and vehicle-mounted charging and discharging system Download PDFInfo
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- CN210468877U CN210468877U CN201921179209.3U CN201921179209U CN210468877U CN 210468877 U CN210468877 U CN 210468877U CN 201921179209 U CN201921179209 U CN 201921179209U CN 210468877 U CN210468877 U CN 210468877U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- 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
- Y02T90/12—Electric charging stations
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Abstract
The utility model discloses a charge-discharge circuit and on-vehicle charge-discharge system, charge-discharge circuit includes the rectifier circuit module, the voltage regulating circuit module, first battery package, the second battery package, first switch, the second switch, vehicle control unit, a load, wherein, the rectifier circuit module is established ties the voltage regulating circuit module, the first battery package is connected to the voltage regulating circuit module, load is connected to first battery package, the one end of second battery package through second switch connection load and voltage regulating circuit module, the other end of voltage regulating circuit module is connected through first switch to the second battery package, voltage regulating circuit module, first battery package, first switch, the second switch, vehicle control unit is all connected to the second battery package. The embodiment of the utility model provides an adopt a plurality of battery packages in charging and discharging circuit, realized using in mixture of different battery packages, make whole car obtain bigger electric quantity, increase continuation of the journey mileage, the user of being convenient for is long-distance to be gone, and it is convenient to bring for the user.
Description
Technical Field
The utility model relates to a circuit design field especially relates to a charge-discharge circuit and on-vehicle charge-discharge system.
Background
In recent years, along with the scarcity of energy and the improvement of environmental awareness of people, more and more people choose to buy the electric automobile to replace the traditional fuel oil vehicle, which is economical and relatively environment-friendly, but compared with the traditional fuel oil vehicle, the electric automobile has short endurance mileage and long charging time, and is a problem which is always relatively troublesome. How to increase the endurance mileage of the whole vehicle makes the electric vehicle more widely applied and has been widely concerned by people for a long time.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a charging and discharging circuit and on-vehicle charging and discharging system, charging and discharging circuit adds a plurality of battery packages, makes whole car obtain bigger electric quantity, can effectively increase electric automobile's continuation of the journey mileage, and the user of being convenient for travels long-distance, and it is convenient to bring for the user.
The first aspect of the embodiments of the present invention provides a charging and discharging circuit applied to a vehicle-mounted charging and discharging system, comprising a rectifier circuit module, a voltage regulating circuit module, a first battery pack, a second battery pack, a first switch, a second switch, a vehicle control unit, and a load,
the rectifier circuit module is connected with the voltage regulating circuit module in series, the voltage regulating circuit module is connected with the first battery pack, the first battery pack is connected with the load, the second battery pack is connected with the load and one end of the voltage regulating circuit module through the second switch, the second battery pack is connected with the other end of the voltage regulating circuit module through the first switch, and the voltage regulating circuit module, the first battery pack, the first switch, the second switch and the second battery pack are all connected with the whole vehicle controller;
the first battery pack comprises a first internal switch and the second battery pack comprises a second internal switch; the vehicle control unit is used for controlling the first switch, the second switch, the first internal switch and the second internal switch; the vehicle control unit is also used for controlling the voltage conversion rate of the voltage regulating circuit module;
when the whole vehicle is in a charging state, the whole vehicle controller is used for controlling the first switch and the second switch to be switched off, the first internal switch is switched on, and the rectifier circuit module is used for converting alternating current into direct current to charge the first battery pack; or the vehicle control unit is used for controlling the first switch and the first internal switch to be switched off, the second switch and the second internal switch to be switched on, and the rectifier circuit module is used for converting alternating current into direct current to charge the second battery pack; when the whole vehicle is in a driving state, the whole vehicle controller is used for controlling the first switch and the second switch to be switched off, and the first internal switch is switched on, so that the first battery pack independently supplies power to the load; or the vehicle control unit is used for controlling the first switch and the first internal switch to be switched off, and the second switch and the second internal switch to be switched on, so that the second battery pack independently supplies power to the load; or, the vehicle control unit is used for controlling the second switch to be switched off, the first switch, the first internal switch and the second internal switch are closed, and the voltage regulating circuit module is used for converting the voltage of the second battery pack into the voltage which is the same as that of the first battery pack, so that the first battery pack and the second battery pack supply power to the load at the same time.
In one embodiment, the charging and discharging circuit further comprises a first pre-charge circuit module, wherein,
the first pre-charging circuit module is connected between the first switch and the voltage regulating circuit module in series, and the first pre-charging circuit module is connected with the vehicle control unit;
when the first battery pack and the second battery pack supply power to the load at the same time, the first pre-charging circuit module is used for protecting the voltage regulating circuit module.
In one embodiment, the first pre-charge circuit module includes a first pre-charge resistor, a third switch, a first diode, and a second diode, wherein,
first pre-charge resistance with the third switch is parallelly connected, first pre-charge resistance one end is passed through first switch connection the second battery package, the first pre-charge resistance other end is connected the positive pole of first diode, the negative pole of first diode is connected the regulator circuit module, the negative pole of second diode passes through first switch connection the second battery package, the positive pole of second diode is connected the regulator circuit module.
In one embodiment, the voltage regulation circuit block includes a power factor control PFC circuit and a DC/DC circuit, wherein,
the power factor control PFC circuit is connected with the DC/DC circuit, the rectifier circuit module is connected with the power factor control PFC circuit in series, the DC/DC circuit is connected with the first battery pack and is connected with the second battery pack through the second switch, and the power factor control PFC circuit and the DC/DC circuit are connected with the whole vehicle controller;
the power factor control PFC circuit is used for power factor correction of voltage, and the DC/DC circuit is used for adjusting a voltage value.
In one embodiment, the charging and discharging circuit further comprises a second pre-charging circuit module, the second pre-charging circuit comprises a second pre-charging resistor, a fourth switch and a fifth switch, the rectifier circuit module comprises a rectifier bridge, wherein,
the second pre-charging resistor is externally connected with an input power supply, the second pre-charging resistor is connected with the fifth switch after being connected with the fourth switch in parallel, and the fifth switch is connected with the rectifier bridge;
the second pre-charging resistor is used for protecting the rectifying circuit module, and when the whole vehicle is in a charging state, the fifth switch is used for controlling the connection or disconnection of the charging circuit.
The second aspect of the embodiment of the utility model also provides a vehicle-mounted charging and discharging system, which comprises an input power supply and the charging and discharging circuit, wherein,
the input power supply is connected with the rectifying circuit module, the rectifying circuit module is connected with the voltage regulating circuit module in series, the voltage regulating circuit module is connected with the first battery pack and is connected with the second battery pack through the second switch, the first battery pack is connected with the load, the second battery pack is connected with the load through the second switch, the second battery pack is connected with the voltage regulating circuit module through the first switch, and the voltage regulating circuit module, the first battery pack, the first switch, the second switch and the second battery pack are all connected with the whole vehicle controller;
the first battery pack comprises a first internal switch and the second battery pack comprises a second internal switch; the vehicle control unit is used for controlling the first switch, the second switch, the first internal switch and the second internal switch; the input power supply supplies power to the first battery pack and the second battery pack, and the vehicle control unit is further used for controlling the voltage conversion rate of the voltage regulating circuit module;
when the whole vehicle is in a charging state, the whole vehicle controller is used for controlling the first switch and the second switch to be switched off, the first internal switch is switched on, and the rectifier circuit module is used for connecting an input power supply and converting alternating current into direct current to charge the first battery pack; or the vehicle control unit is used for controlling the first switch and the first internal switch to be switched off, the second switch and the second internal switch to be switched on, and the rectifier circuit module is used for connecting the input power supply and converting alternating current into direct current to charge the second battery pack; when the whole vehicle is in a driving state, the whole vehicle controller is used for controlling the first switch and the second switch to be switched off, and the first internal switch is switched on, so that the first battery pack independently supplies power to the load; or the vehicle control unit is used for controlling the first switch and the first internal switch to be switched off, and the second switch and the second internal switch to be switched on, so that the second battery pack independently supplies power to the load; or, the vehicle control unit is used for controlling the second switch to be switched off, the first switch, the first internal switch and the second internal switch are closed, and the voltage regulating circuit module is used for converting the voltage of the second battery pack into the voltage which is the same as that of the first battery pack, so that the first battery pack and the second battery pack supply power to the load at the same time.
The utility model discloses a, charging and discharging circuit is applied to on-vehicle charging and discharging system, including rectifier circuit module, voltage regulating circuit module, first battery package, second battery package, first switch, second switch, vehicle control unit, load, wherein, rectifier circuit module connects in series the voltage regulating circuit module, the voltage regulating circuit module is connected the first battery package, the first battery package is connected the load, the second battery package passes through the second switch and connects the load with one end of voltage regulating circuit module, the second battery package passes through the first switch and connects the other end of voltage regulating circuit module, the first battery package, the first switch, the second switch and the second battery package all connect the vehicle control unit; the first battery pack comprises a first internal switch and the second battery pack comprises a second internal switch; the vehicle control unit is used for controlling the first switch, the second switch, the first internal switch and the second internal switch; the vehicle control unit is also used for controlling the voltage conversion rate of the voltage regulating circuit module; when the whole vehicle is in a charging state, the whole vehicle controller is used for controlling the first switch and the second switch to be switched off, the first internal switch is switched on, and the rectifier circuit module is used for converting alternating current into direct current to charge the first battery pack; or the vehicle control unit is used for controlling the first switch and the first internal switch to be switched off, the second switch and the second internal switch to be switched on, and the rectifier circuit module is used for converting alternating current into direct current to charge the second battery pack; when the whole vehicle is in a driving state, the whole vehicle controller is used for controlling the first switch and the second switch to be switched off, and the first internal switch is switched on, so that the first battery pack independently supplies power to the load; or the vehicle control unit is used for controlling the first switch and the first internal switch to be switched off, and the second switch and the second internal switch to be switched on, so that the second battery pack independently supplies power to the load; or, the vehicle control unit is used for controlling the second switch to be switched off, the first switch, the first internal switch and the second internal switch are closed, and the voltage regulating circuit module is used for converting the voltage of the second battery pack into the voltage which is the same as that of the first battery pack, so that the first battery pack and the second battery pack supply power to the load at the same time. It can be seen that, the utility model discloses in adopt a plurality of battery packages in charging and discharging circuit, can realize that many battery packages charge, make whole car obtain bigger electric quantity, and can realize many battery packages through the regulator circuit module and discharge simultaneously, realized mixing of different battery packages and used, increase the continuation of the journey mileage, the user of being convenient for travels in long-distance, it is convenient to bring for the user.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the background of the present invention, the drawings related to the embodiments or the background of the present invention will be briefly described below.
Fig. 1 is a schematic structural diagram of a charging and discharging circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another charge and discharge circuit provided in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another charge and discharge circuit provided in an embodiment of the present invention;
fig. 4 is a schematic diagram of a vehicle-mounted charging and discharging system provided by the embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The terms "first," "second," and the like in the description and in the claims, and in the drawings described above, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, system, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Among the commonly used pure electric vehicles, the most influential one to the electric vehicles is the replacement or charging of the storage battery. A common electric automobile adopts a single battery pack, a mains supply input charges the single battery pack through a rectification current and a voltage regulation circuit, and when the vehicle is in power supply demand, the single battery pack supplies power to a load. The existing vehicle-mounted battery charging and discharging circuit can only realize the function of charging a single battery pack, cannot realize the mixed use of different battery packs, has short endurance mileage, is inconvenient for a user to travel for a long distance, and cannot bring convenience to the user.
In view of the above problems, an embodiment of the present invention provides a charging and discharging circuit and a vehicle-mounted charging and discharging system, the charging and discharging circuit is applied to the vehicle-mounted charging and discharging system, and includes a rectifier circuit module, a voltage regulating circuit module, a first battery pack, a second battery pack, a first switch, a second switch, a vehicle controller, and a load,
the rectifier circuit module is connected with the voltage regulating circuit module in series, the voltage regulating circuit module is connected with the first battery pack, the first battery pack is connected with the load, the second battery pack is connected with the load and one end of the voltage regulating circuit module through the second switch, the second battery pack is connected with the other end of the voltage regulating circuit module through the first switch, and the voltage regulating circuit module, the first battery pack, the first switch, the second switch and the second battery pack are all connected with the whole vehicle controller; the first battery pack comprises a first internal switch and the second battery pack comprises a second internal switch; the vehicle control unit is used for controlling the first switch, the second switch, the first internal switch and the second internal switch; the vehicle control unit is also used for controlling the voltage conversion rate of the voltage regulating circuit module; when the whole vehicle is in a charging state, the whole vehicle controller is used for controlling the first switch and the second switch to be switched off, the first internal switch is switched on, and the rectifier circuit module is used for converting alternating current into direct current to charge the first battery pack; or the vehicle control unit is used for controlling the first switch and the first internal switch to be switched off, the second switch and the second internal switch to be switched on, and the rectifier circuit module is used for converting alternating current into direct current to charge the second battery pack; when the whole vehicle is in a driving state, the whole vehicle controller is used for controlling the first switch and the second switch to be switched off, and the first internal switch is switched on, so that the first battery pack independently supplies power to the load; or the vehicle control unit is used for controlling the first switch and the first internal switch to be switched off, and the second switch and the second internal switch to be switched on, so that the second battery pack independently supplies power to the load; or, the vehicle control unit is used for controlling the second switch to be switched off, the first switch, the first internal switch and the second internal switch are closed, and the voltage regulating circuit module is used for converting the voltage of the second battery pack into the voltage which is the same as that of the first battery pack, so that the first battery pack and the second battery pack supply power to the load at the same time. It can be seen that, the utility model discloses in adopt a plurality of battery packages in charging and discharging circuit, can realize that many battery packages charge, make whole car obtain bigger electric quantity, and can realize many battery packages through the regulator circuit module and discharge simultaneously, realized mixing of different battery packages and used, increase the continuation of the journey mileage, the user of being convenient for travels in long-distance, it is convenient to bring for the user.
The embodiments of the present invention will be described with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic diagram of a charging and discharging circuit 100 applied to a vehicle-mounted charging and discharging system according to an embodiment of the present invention, which includes a rectifier circuit module 110, a voltage regulating circuit module 120, a first battery pack 130, a second battery pack 140, a first switch 150, a second switch 160, a vehicle controller 170, and a load 200,
the rectifier circuit module 110 is connected in series with the voltage regulating circuit module 120, the voltage regulating circuit module 120 is connected with the first battery pack 130, the first battery pack 130 is connected with the load 200, the second battery pack 140 is connected with one end of the load 200 and one end of the voltage regulating circuit module 120 through the second switch 160, the second battery pack 140 is connected with the other end of the voltage regulating circuit module 120 through the first switch 150, and the voltage regulating circuit module 120, the first battery pack 130, the first switch 150, the second switch 160 and the second battery pack 140 are all connected with the vehicle controller 170;
the first battery pack 130 includes a first internal switch, and the second battery pack 140 includes a second internal switch; the vehicle controller 170 is configured to control the first switch 150, the second switch 160, the first internal switch, and the second internal switch; the vehicle control unit 170 is further configured to control a voltage conversion rate of the voltage regulating circuit module 120;
when the entire vehicle is in a charging state, the entire vehicle controller 170 is configured to control the first switch 150 and the second switch 160 to be turned off, the first internal switch is turned on, and the rectifier circuit module 110 is configured to convert an alternating current into a direct current to charge the first battery pack 130; or, the vehicle control unit 170 is configured to control the first switch 150 and the first internal switch to be opened, the second switch 160 and the second internal switch to be closed, and the rectifier circuit module 110 is configured to convert an alternating current into a direct current to charge the second battery pack 140; when the whole vehicle is in a driving state, the vehicle controller 170 is configured to control the first switch 150 and the second switch 160 to be turned off, and the first internal switch is turned on, so that the first battery pack 130 independently supplies power to the load 200; or, the vehicle control unit 170 is configured to control the first switch 150 and the first internal switch to be opened, and the second switch 160 and the second internal switch to be closed, so as to enable the second battery pack 140 to separately supply power to the load 200; or, the vehicle control unit 170 is configured to control the second switch 160 to be turned off, the first switch 150, the first internal switch and the second internal switch are turned on, and the voltage regulating circuit module 120 is configured to convert the voltage of the second battery pack 140 to be the same as that of the first battery pack 130, so that the first battery pack 130 and the second battery pack 140 supply power to the load 200 at the same time.
The second battery pack is used as an extra battery pack, the capacity of the second battery pack can be different from that of the first battery pack, the second battery pack can be completely the same as the first battery pack, therefore, when different battery packs are charged, the voltage regulating module is regulated according to the charging voltage of different battery packs, and when the first battery pack and the second battery pack have charging requirements, the first battery pack or the second battery pack are charged according to a preset strategy, and the preset strategy can include but is not limited to a preset charging sequence or preferentially charges the battery packs with better performance.
In this example, it can be seen that charging different battery packs can be achieved by adding the second battery pack 140, so that the whole vehicle obtains a larger electric quantity, and it can be achieved that different battery packs are discharged separately and that multiple battery packs are discharged simultaneously through the voltage regulating circuit module 120, thereby achieving mixed use of different battery packs and increasing the endurance mileage.
As a possible implementation manner, please refer to fig. 2, fig. 2 is a schematic diagram of a charging and discharging circuit according to an embodiment of the present invention, the charging and discharging circuit further includes a first pre-charging circuit module 180, wherein the first pre-charging circuit module 180 is connected in series between the first switch 150 and the voltage regulating circuit module 120, and the first pre-charging circuit module 180 is connected to the vehicle control unit 170;
when the first battery pack 130 and the second battery pack 140 simultaneously supply power to the load 200, the first pre-charge circuit module 180 is used to protect the voltage regulation circuit module 120.
One end of the first pre-charging circuit module 180 is connected to the second battery pack 140 through a first switch 150, and the second battery pack 140 is connected to a load through a second switch 160; the other end of the first pre-charging circuit module 180 is connected to the voltage regulating circuit module 120 and the rectifying circuit module 110, the rectifying circuit module 110 is connected to the second pre-charging circuit module 190, and the voltage regulating circuit module 120 is connected to the first battery pack 130 and the load 200. When the second battery pack 140 and the first battery pack 130 supply power to the load 200 at the same time and the first switch 150 is closed, the circuit is pre-charged through the first pre-charging circuit module 180.
In this example, the first pre-charge circuit module 180 is connected in series between the second battery pack 140 and the voltage regulation circuit module 120, so that when the entire vehicle is in a charging state, the discharge current of the second battery pack is prevented from damaging the voltage regulation circuit module 120 and the rectifier circuit module 110 at the moment when the first switch 150 is closed.
As a possible implementation manner, referring to fig. 3, fig. 3 is a schematic structural diagram of a charging and discharging circuit, the first pre-charge circuit module 180 includes a first pre-charge resistor 181, a third switch 182, a first diode 183, and a second diode 184, wherein,
first pre-charge resistance 181 with third switch 182 is parallelly connected, first pre-charge resistance 181 one end is passed through first switch 150 is connected second battery package 140, the first pre-charge resistance 181 other end is connected the positive pole of first diode 183, the negative pole of first diode 183 is connected regulator circuit module 120, the negative pole of second diode 184 passes through first switch 150 is connected second battery package 140, the positive pole of second diode 184 is connected regulator circuit module 120.
One end of the first pre-charging resistor 181 is connected to the first switch 150 and then to the second battery pack 140, and the other end of the first pre-charging resistor 181 is connected to the anode of the first diode 183; the cathode of the second diode 184 is connected to the second battery pack 140 through the first switch 150.
The first switch 150 and the second switch 160 may be single-pole switches or double-pole switches, as shown in fig. 3, the first switch 150 and the second switch 160 are double-pole switches, the first switch 150 includes K7 and K8, and the second switch 160 includes K9 and K10.
When the entire vehicle is in a driving state and the second battery pack 140 and the first battery pack 130 simultaneously supply power to the load 200, the first switch 150 is closed to complete the pre-charging, and then the third switch 182 is closed.
In this example, when the entire vehicle is in a driving state, the discharging current of the second battery pack 140 is prevented from damaging the voltage-regulating circuit module 120 and the rectifying circuit module 110 by the first pre-charging circuit 180 at the moment when the first switch 150 is closed; the cathode of the second diode 184 is connected to the second battery pack 140 through the first switch 150 to prevent the second battery pack 140 from being reversely connected, so as to protect the circuit.
Referring to fig. 3, the voltage regulating circuit module 120 includes a power factor control PFC circuit 121 and a DC/DC circuit 122, wherein,
the power factor control PFC circuit 121 is connected to the DC/DC circuit 122, the rectifier circuit module 110 is connected in series to the power factor control PFC circuit 121, the DC/DC circuit 122 is connected to the first battery pack 130 and connected to the second battery pack 140 through the second switch 160, and the power factor control PFC circuit 121 and the DC/DC circuit 122 are connected to the vehicle controller 170;
the PFC circuit 121 is used for power factor correction of voltage, and the DC/DC circuit 122 is used for adjusting a voltage value.
When the entire vehicle is in a charging state, the entire vehicle controller 170 controls the power factor control PFC circuit 121 and the DC/DC circuit 122 to adjust the charging voltage to adapt to the charging voltage of the first battery pack 130 or the second battery pack 140. When the entire vehicle is in a discharging state, the entire vehicle controller 170 controls the power factor control PFC circuit 121 and the DC/DC circuit 122 to adjust the charging voltage so that the voltage range and other parameters of the second battery pack 140 are the same as those of the first battery pack 130, and the parameters are used for supplying power to the load together.
In this example, the charging voltage or the discharging voltage of the second battery pack 140 is adjusted by controlling the PFC circuit 121 and the DC/DC circuit 122 according to the power factor, so that a plurality of different battery packs can be charged, the battery capacity of the whole vehicle can be increased, different battery packs can be discharged simultaneously, the mixed use of different battery packs can be realized, and the cruising range can be increased.
As a possible implementation manner, referring to fig. 3, the charging and discharging circuit further includes a second pre-charging circuit module 190, the second pre-charging circuit module 190 is connected to the vehicle control unit 170, the second pre-charging circuit module 190 includes a second pre-charging resistor 191, a fourth switch 192 and a fifth switch 193, the rectifier circuit module 110 includes a rectifier bridge 111, wherein,
the second pre-charging resistor 191 is used for being externally connected with an input power supply, the second pre-charging resistor 191 is further connected with the fifth switch 193 after being connected with the fourth switch 192 in parallel, and the fifth switch 193 is connected with the rectifier bridge 111;
the second pre-charging resistor 191 is used for protecting the rectifier circuit module 110, and when the entire vehicle is in a charging state, the fifth switch 193 is used for controlling connection or disconnection of the charging circuit.
The second precharge circuit module 190 is connected to the detection circuit 400, and the detection circuit 400 is used for detecting the voltage of the charging circuit. When the whole vehicle is in a charging state, the fourth switch 192 is closed first, and after the pre-charging is completed, the fifth switch 193 is closed; the multiple battery packs supply power to the load 200 at the same time, and the charging circuit is controlled to be connected or disconnected through the fifth switch 193.
In this example, when the entire vehicle is in a charging state, the second pre-charge circuit module is used to prevent the charging current of the input power source from damaging the rectifier circuit module 110 at the moment when the fifth switch 193 is closed.
The embodiment of the present invention further provides a vehicle charging and discharging system, please refer to fig. 4, fig. 4 is a schematic diagram of the vehicle charging and discharging system, the vehicle charging and discharging system includes the charging and discharging circuit, wherein,
the input power source 300 is connected to the rectifier circuit module 110, the rectifier circuit module 110 is connected in series to the voltage regulation circuit module 120, the voltage regulation circuit module 120 is connected to the first battery pack 130, the first battery pack 130 is connected to the load 200, the second battery pack 140 is connected to the load 200 and one end of the voltage regulation circuit module 120 through the second switch 160, the second battery pack 140 is connected to the other end of the voltage regulation circuit module 120 through the first switch 150, and the voltage regulation circuit module 120, the first battery pack 130, the first switch 150, the second switch 160, and the second battery pack 140 are all connected to the vehicle controller 170;
the first battery pack 130 includes a first internal switch, and the second battery pack 140 includes a second internal switch; the vehicle controller 170 is configured to control the first switch 150, the second switch 160, the first internal switch, and the second internal switch; the input power source 300 supplies power to the first battery pack 130 and the second battery pack 140, and the vehicle control unit 170 is further configured to control a voltage conversion rate of the voltage regulating circuit module 120;
when the whole vehicle is in a charging state, the vehicle controller 170 is configured to control the first switch 150 and the second switch 160 to be turned off, the first internal switch is turned on, and the rectifier circuit module 110 is configured to be connected to the input power supply 300 and convert an alternating current into a direct current to charge the first battery pack 130; or, the vehicle control unit 170 is configured to control the first switch 150 and the first internal switch to be opened, the second switch 160 and the second internal switch to be closed, and the rectifier circuit module 110 is configured to connect to the input power source 300 and convert ac power into dc power to charge the second battery pack 140; when the whole vehicle is in a driving state, the vehicle controller 170 is configured to control the first switch 150 and the second switch 160 to be turned off, and the first internal switch is turned on, so that the first battery pack 130 independently supplies power to the load 200; or, the vehicle control unit 170 is configured to control the first switch 150 and the first internal switch to be opened, and the second switch 160 and the second internal switch to be closed, so as to enable the second battery pack 140 to separately supply power to the load 200; or, the vehicle control unit 170 is configured to control the second switch 160 to be turned off, the first switch 150, the first internal switch and the second internal switch are turned on, and the voltage regulating circuit module 120 is configured to convert the voltage of the second battery pack 140 to be the same as that of the first battery pack 130, so that the first battery pack 130 and the second battery pack 140 supply power to the load 200 at the same time.
It should be noted that, for the sake of simplicity, the aforementioned embodiments of the present invention are described as a series of combinations of actions, but it should be understood by those skilled in the art that the present invention is not limited by the described order of actions, because some steps can be performed in other orders or simultaneously according to the present invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the several embodiments provided in the present disclosure, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units is only one type of division of logical functions, and other divisions may be realized in practice, 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 of some interfaces, devices or units, and may be an electric or other form.
The 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 purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention 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 embodiments of the present invention have been described in detail, and the principles and embodiments of the present invention have been explained herein using specific embodiments, and the above description of the embodiments is only used to help understand the present invention and its core ideas; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there may be changes in the specific implementation and application scope, and in summary, the content of the present specification should not be understood as the limitation of the present invention.
Claims (6)
1. A charging and discharging circuit is characterized by comprising a rectifying circuit module, a voltage regulating circuit module, a first battery pack, a second battery pack, a first switch, a second switch, a vehicle control unit and a load,
the rectifier circuit module is connected with the voltage regulating circuit module in series, the voltage regulating circuit module is connected with the first battery pack, the first battery pack is connected with the load, the second battery pack is connected with the load and one end of the voltage regulating circuit module through the second switch, the second battery pack is connected with the other end of the voltage regulating circuit module through the first switch, and the voltage regulating circuit module, the first battery pack, the first switch, the second switch and the second battery pack are all connected with the whole vehicle controller;
the first battery pack comprises a first internal switch and the second battery pack comprises a second internal switch; the vehicle control unit is used for controlling the first switch, the second switch, the first internal switch and the second internal switch; the vehicle control unit is also used for controlling the voltage conversion rate of the voltage regulating circuit module;
when the whole vehicle is in a charging state, the whole vehicle controller is used for controlling the first switch and the second switch to be switched off, the first internal switch is switched on, and the rectifier circuit module is used for converting alternating current into direct current to charge the first battery pack; or the vehicle control unit is used for controlling the first switch and the first internal switch to be switched off, the second switch and the second internal switch to be switched on, and the rectifier circuit module is used for converting alternating current into direct current to charge the second battery pack; when the whole vehicle is in a driving state, the whole vehicle controller is used for controlling the first switch and the second switch to be switched off, and the first internal switch is switched on, so that the first battery pack independently supplies power to the load; or the vehicle control unit is used for controlling the first switch and the first internal switch to be switched off, and the second switch and the second internal switch to be switched on, so that the second battery pack independently supplies power to the load; or, the vehicle control unit is used for controlling the second switch to be switched off, the first switch, the first internal switch and the second internal switch are closed, and the voltage regulating circuit module is used for converting the voltage of the second battery pack into the voltage which is the same as that of the first battery pack, so that the first battery pack and the second battery pack supply power to the load at the same time.
2. The charging and discharging circuit of claim 1, further comprising a first pre-charge circuit module, wherein,
the first pre-charging circuit module is connected between the first switch and the voltage regulating circuit module in series, and the first pre-charging circuit module is connected with the vehicle control unit;
when the first battery pack and the second battery pack supply power to the load at the same time, the first pre-charging circuit module is used for protecting the voltage regulating circuit module.
3. The charging and discharging circuit of claim 2, wherein the first pre-charging circuit module comprises a first pre-charging resistor, a third switch, a first diode and a second diode, wherein,
first pre-charge resistance with the third switch is parallelly connected, first pre-charge resistance one end is passed through first switch connection the second battery package, the first pre-charge resistance other end is connected the positive pole of first diode, the negative pole of first diode is connected the regulator circuit module, the negative pole of second diode passes through first switch connection the second battery package, the positive pole of second diode is connected the regulator circuit module.
4. The charging and discharging circuit according to any of claims 1 to 3, wherein the voltage regulating circuit module comprises a power factor control PFC circuit and a DC/DC circuit, wherein,
the power factor control PFC circuit is connected with the DC/DC circuit, the rectifier circuit module is connected with the power factor control PFC circuit in series, the DC/DC circuit is connected with the first battery pack and is connected with the second battery pack through the second switch, and the power factor control PFC circuit and the DC/DC circuit are connected with the whole vehicle controller;
the power factor control PFC circuit is used for power factor correction of voltage, and the DC/DC circuit is used for adjusting a voltage value.
5. The charging and discharging circuit of claim 4, further comprising a second pre-charging circuit module, wherein the second pre-charging circuit module is connected to the vehicle control unit, the second pre-charging circuit module comprises a second pre-charging resistor, a fourth switch and a fifth switch, the rectifier circuit module comprises a rectifier bridge, wherein,
the second pre-charging resistor is externally connected with an input power supply, the second pre-charging resistor is connected with the fifth switch after being connected with the fourth switch in parallel, and the fifth switch is connected with the rectifier bridge;
the second pre-charging resistor is used for protecting the rectifying circuit module, and when the whole vehicle is in a charging state, the fifth switch is used for controlling the connection or disconnection of the charging circuit.
6. A vehicle-mounted charging and discharging system comprising an input power supply, characterized by further comprising the charging and discharging circuit of any one of claims 1 to 5, wherein,
the rectifying circuit module is connected with an input power supply and converts alternating current into direct current so as to charge the first battery pack or the second battery pack;
the input power supply is used for supplying power to the first battery pack and the second battery pack.
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| CN201921179209.3U CN210468877U (en) | 2019-07-24 | 2019-07-24 | Charging and discharging circuit and vehicle-mounted charging and discharging system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111556823A (en) * | 2019-07-24 | 2020-08-18 | 深圳欣锐科技股份有限公司 | Charging and discharging circuit, vehicle-mounted charging and discharging system and charging and discharging method |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111556823A (en) * | 2019-07-24 | 2020-08-18 | 深圳欣锐科技股份有限公司 | Charging and discharging circuit, vehicle-mounted charging and discharging system and charging and discharging method |
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