CN111098733A - Bidirectional charging system and control method thereof - Google Patents

Bidirectional charging system and control method thereof Download PDF

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Publication number
CN111098733A
CN111098733A CN202010035603.0A CN202010035603A CN111098733A CN 111098733 A CN111098733 A CN 111098733A CN 202010035603 A CN202010035603 A CN 202010035603A CN 111098733 A CN111098733 A CN 111098733A
Authority
CN
China
Prior art keywords
switch
plug
charging
conversion module
battery pack
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010035603.0A
Other languages
Chinese (zh)
Inventor
孟祥跃
李正军
高小辉
王继强
王永健
汤小生
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Geely Holding Group Co Ltd
Ningbo Geely Automobile Research and Development Co Ltd
Zhejiang Geely Automobile Research Institute Co Ltd
Original Assignee
Zhejiang Geely Holding Group Co Ltd
Zhejiang Geely Automobile Research Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Geely Holding Group Co Ltd, Zhejiang Geely Automobile Research Institute Co Ltd filed Critical Zhejiang Geely Holding Group Co Ltd
Priority to CN202010035603.0A priority Critical patent/CN111098733A/en
Publication of CN111098733A publication Critical patent/CN111098733A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/10Methods 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
    • B60L53/14Conductive energy transfer
    • B60L53/16Connectors, e.g. plugs or sockets, specially adapted for charging electric vehicles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L53/00Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/14Plug-in electric vehicles

Abstract

The invention relates to a bidirectional charging system and a control method thereof, wherein the system comprises: the device comprises a plug, an integrated discharging device and a battery pack; the plug comprises a first plug and a second plug, the first plug is electrically connected with one end of the integrated discharging device, the second plug is electrically connected with the other end of the integrated discharging device, the first plug is used for connecting an external charging device, and the second plug is used for connecting a battery pack; the integrated discharging device comprises a charging and discharging conversion module, a switch assembly and a discharging socket, wherein the charging and discharging conversion module is used for converting alternating current transmitted by the first plug into direct current and converting direct current transmitted by the battery pack into alternating current, the switch assembly is electrically connected with the charging and discharging conversion module, and the switch assembly is used for transmitting the direct current converted by the charging and discharging conversion module to the battery pack and transmitting the alternating current converted by the charging and discharging conversion module to the discharging socket. The invention can realize the discharge of the alternating current of the battery pack in the vehicle and the charging of the battery pack by the charging equipment outside the vehicle.

Description

Bidirectional charging system and control method thereof
Technical Field
The invention relates to the technical field of charging devices, in particular to a bidirectional charging system and a control method thereof.
Background
With the continuous reduction of traditional energy and the pollution of the environment, the application of new energy is more extensive, and especially new energy automobiles in the automobile industry are continuously popularized, so that direct current charging equipment applied to the new energy automobiles is continuously increased, and through analysis of market data up to now, a third party operation charging station, a highway, a taxi, a network reservation car and the like all use direct current requirements as guidance, and according to the reality, the state also promotes a small direct current charging scheme.
At present, there are two kinds of dc charging schemes, the first scheme is that a dc charging port goes to a charging box and then to a charging device/load, and the first scheme has the advantages that: 1) the product structure is optimized, different host factories can share one product to realize matching, the product standardization can be realized, and 2) in addition, the cost can be saved; 3) there is mature CAN communication for information transfer, but the first solution has the disadvantages: the weight of the charging box is slightly heavy; the second scheme is that the alternating current charging port is connected with the charging box to the charging device and the alternating current charging port is connected with the power strip to the load, and the second scheme has the advantages that: the charging box is lightweight, but the second solution has disadvantages in that: the external discharge equipment of each host factory is incompatible with each other, and the cost of the whole vehicle is high;
therefore, in order to solve the problems in the prior art, it is urgently needed to develop a device and a method which can combine two charging schemes.
Disclosure of Invention
In view of the above problems in the prior art, an object of the present invention is to provide a bidirectional charging system and a control method thereof, which can implement ac external discharge of a battery pack in a vehicle and charging of the battery pack by an external charging device, and take into account the use of different external devices, thereby reducing the burden and weight of the entire vehicle and saving the cost.
In order to solve the above problem, the present invention provides a bidirectional charging system, including: the device comprises a plug, an integrated discharging device and a battery pack;
the plug comprises a first plug and a second plug, the first plug is electrically connected with one end of the integrated discharging device, the second plug is electrically connected with the other end of the integrated discharging device, the first plug is used for connecting an external charging device, and the second plug is used for connecting the battery pack;
the integrated discharging device comprises a charging and discharging conversion module, a switch assembly and a discharging socket, wherein the charging and discharging conversion module is used for converting alternating current transmitted by a first plug into direct current and converting direct current transmitted by the battery pack into alternating current, the switch assembly is electrically connected with the charging and discharging conversion module, and the switch assembly is used for conveying the direct current converted by the charging and discharging conversion module to the battery pack and conveying the alternating current converted by the charging and discharging conversion module to the discharging socket.
Further, the plug and the integrated discharge device are connected through a cable.
Further, the first plug is a three-pin plug.
Further, the second plug is a direct current charging gun head.
Further, the system further comprises a socket, the socket comprises a first socket and a second socket, the first socket is matched with the first plug for use, the first socket is used for releasing alternating current of an external charging device, and the second socket is matched with the second plug for use and used for releasing direct current converted by the charging and discharging conversion module.
Further, the switch assembly includes first to seventh switches, a first switch and a second switch of the first to seventh switches are disposed between the charge-discharge conversion module and the first plug, and the first switch and the second switch are used for the charge-discharge conversion module and the first plug to form an electrical path.
Further, a third switch and a fourth switch of the first to seventh switches are arranged between the charging and discharging conversion module and the second plug, and the third switch and the fourth switch are used for forming an electric path between the charging and discharging conversion module and the second plug.
Further, a fifth switch of the first to seventh switches is used to turn on and off the switch assembly.
Further, a sixth switch and a seventh switch of the first to seventh switches are disposed between the charge-discharge conversion module and the battery pack, and the sixth switch and the seventh switch are used for the charge-discharge conversion module and the battery pack to form an electric path.
The invention also provides a control method based on any one of the two-way charging systems, which comprises the following steps:
judging whether the current working state of the battery pack is a to-be-charged state or a to-be-discharged state;
when the current working state is a state to be charged, a first switch, a second switch, a sixth switch and a seventh switch are turned on, and direct current is input to the integrated discharging device through a first plug;
converting the direct current charging into alternating current through a discharge conversion module and inputting the alternating current into a battery pack;
when the current working state is a state to be discharged, judging whether a fifth switch is turned on;
when the fifth switch is turned on, the third switch, the fourth switch, the sixth switch and the seventh switch are turned on, the first switch and the second switch are turned off simultaneously, and alternating current is input to the integrated discharging device through the second plug;
and converting the alternating current into direct current through a discharge conversion module and inputting the direct current into external equipment.
Due to the technical scheme, the invention has the following beneficial effects:
according to the bidirectional charging system and the control method thereof, the alternating current external discharging of the battery pack in the vehicle and the charging of the battery pack by the external charging equipment can be realized, the use of different external discharging equipment is considered, the burden and the weight of the whole vehicle are reduced, and the cost is saved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiment or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic structural diagram of a bidirectional charging system provided in embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of an integrated discharge device provided in embodiment 1 of the present invention;
fig. 3 is a flowchart of a control method of a bidirectional charging system according to embodiment 1 of the present invention.
The system comprises a plug 1, a plug 2, an integrated discharging device 3, a battery pack 4, a cable 5, a socket 11, a first plug 12, a first plug 21, a charging and discharging conversion module 22, a switch assembly 23, a discharging socket 221, a first switch 222, a second switch 223, a third switch 224, a fourth switch 225, a fifth switch 226, a sixth switch 227, a seventh switch 51, a first socket 52 and a second socket 52.
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 obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the invention. In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
Example one
The first embodiment provides a bidirectional charging system, which is shown in fig. 1 and fig. 2, and includes: the plug 1, the integrated discharging device 2 and the battery pack 3;
the plug 1 comprises a first plug 11 and a second plug 12, the first plug 1 is electrically connected with one end of the integrated discharging device 2, the second plug 12 is electrically connected with the other end of the integrated discharging device 2, the first plug 11 is used for connecting an external charging device, and the second plug 12 is used for connecting the battery pack 3;
the integrated discharging device 2 comprises a charging and discharging conversion module 21, a switch assembly 22 and a discharging socket 23, wherein the charging and discharging conversion module 21 is used for converting alternating current transmitted by the first plug 11 into direct current and converting direct current transmitted by the battery pack 3 into alternating current, the switch assembly 22 is electrically connected with the charging and discharging conversion module 21, and the switch assembly 22 is used for transmitting the direct current converted by the charging and discharging conversion module 21 to the battery pack 3 and transmitting the alternating current converted by the charging and discharging conversion module 21 to the discharging socket 23.
Specifically, the plug 1 and the integrated discharge device 2 are connected by a cable 4.
Preferably, the first plug 11 is a three-pin plug.
Preferably, the second plug 12 is a dc charging gun head.
Specifically, the system further includes a socket 5, where the socket 5 includes a first socket 51 and a second socket 52, the first socket 51 is used in cooperation with the first plug 11, the first socket 51 is used to release the alternating current of the external charging device, and the second socket 52 is used in cooperation with the second plug 12 to release the direct current converted by the charge-discharge conversion module 21.
Specifically, the switch assembly 22 includes first to seventh switches.
Further, a first switch 221 and a second switch 222 of the first to seventh switches are disposed between the charge-discharge conversion module 21 and the first plug 11, and the first switch 221 and the second switch 222 are used for the charge-discharge conversion module 21 and the first plug 11 to form an electrical path.
Further, a third switch 223 and a fourth switch 224 of the first to seventh switches are disposed between the charge and discharge conversion module 21 and the second plug 12, and the third switch 223 and the fourth switch 224 are used for the charge and discharge conversion module 21 and the second plug 12 to form an electric path.
Further, a fifth switch 225 of the first to seventh switches is used to turn on and off the switch assembly 22.
Further, a sixth switch 226 and a seventh switch 227 of the first to seventh switches are disposed between the charge-discharge conversion module 21 and the battery pack 3, and the sixth switch 226 and the seventh switch 227 are used for the charge-discharge conversion module 21 and the battery pack 3 to form an electrical path.
As shown in fig. 3, the present embodiment further provides a control method based on the bidirectional charging system of any one of the preceding claims, including the following steps:
s101, judging that the current working state of the battery pack is a to-be-charged state or a to-be-discharged state;
s102, when the current working state is a state to be charged, starting a first switch, a second switch, a sixth switch and a seventh switch, and inputting direct current to the integrated discharging device through a first plug;
s103, converting the direct current charging through a discharging conversion module into alternating current to be input into a battery pack;
s104, when the current working state is a state to be discharged, judging whether a fifth switch is turned on;
s105, when the fifth switch is turned on, turning on a third switch, a fourth switch, a sixth switch and a seventh switch, simultaneously turning off the first switch and the second switch, and inputting alternating current to the integrated discharging device through the second plug;
and S106, converting the alternating current into direct current through a discharge conversion module and inputting the direct current into external equipment.
Specifically, the entire vehicle control device controls the battery pack 3 to be charged or discharged, when the battery pack 3 needs to be charged, the sixth switch 226 and the seventh switch 227 are turned on, so that the battery pack 3 is electrically connected with the discharge conversion module 21, the first switch 221 and the second switch 222 are turned on, the three-pin plug is turned on, so that the direct current of the external charging device is transmitted to the discharge conversion module 21, and the discharge conversion module 21 converts the direct current into the alternating current to charge the battery pack 3; when the battery pack 3 needs to be discharged, the sixth switch 226 and the seventh switch 227 are turned on, so that the battery pack 3 is electrically connected to the discharge conversion module 21, the first switch 221 and the second switch 222 are turned off, the third switch 223 and the fourth switch 224 are turned on, so that the integrated discharge device 2 is in a standby state, when the fifth switch 225 is turned on, the alternating current provided by the battery pack 3 is converted into direct current through the discharge conversion module 21, the direct current is transmitted to the discharge socket 23 for use by an external device, and when the fifth switch 225 is turned off, the integrated discharge device 2 is continuously in the standby state.
The embodiment provides a bidirectional charging system and a control method thereof, which can realize the discharge of alternating current of a battery pack in a vehicle and the charging of the battery pack by a charging device outside the vehicle, and also take into account the use of different discharge devices, thereby reducing the burden and weight of the whole vehicle and saving the cost.
The foregoing description has disclosed fully preferred embodiments of the present invention. It should be noted that those skilled in the art can make modifications to the embodiments of the present invention without departing from the scope of the appended claims. Accordingly, the scope of the appended claims is not to be limited to the specific embodiments described above.

Claims (10)

1. A bi-directional charging system, comprising: the plug (1), the integrated discharging device (2) and the battery pack (3);
the plug (1) comprises a first plug (11) and a second plug (12), the first plug (1) is electrically connected with one end of the integrated discharging device (2), the second plug (12) is electrically connected with the other end of the integrated discharging device (2), the first plug (11) is used for connecting an external charging device, and the second plug (12) is used for connecting the battery pack (3);
integrated discharge device (2) are including charge-discharge conversion module (21), switch module (22) and discharge socket (23), charge-discharge conversion module (21) are used for converting the alternating current of first plug (11) transmission and are direct current and conversion the direct current of battery package (3) transmission is the alternating current, switch module (22) with charge-discharge conversion module (21) electricity is connected, switch module (22) are used for with the direct current that charge-discharge conversion module (21) converted is carried to battery package (3) and with the alternating current that charge-discharge conversion module (21) converted is carried to discharge socket (23).
2. A bidirectional charging system as claimed in claim 1, characterized in that the connection between the plug (1) and the integrated discharging device (2) is via a cable (4).
3. A bidirectional charging system as claimed in claim 1, characterized in that said first plug (11) is a three-pin plug.
4. A bi-directional charging system according to claim 1, wherein the second plug (12) is a dc charging gun head.
5. A bidirectional charging system as claimed in claim 1, further comprising a socket (5), wherein the socket (5) comprises a first socket (51) and a second socket (52), the first socket (51) is used in cooperation with the first plug (11), the first socket (51) is used for releasing the alternating current of an external charging device, and the second socket (52) is used in cooperation with the second plug (12) for releasing the direct current converted by the charge-discharge conversion module (21).
6. A bidirectional charging system as claimed in claim 1, wherein the switch assembly (22) includes first to seventh switches, a first switch (221) and a second switch (222) of the first to seventh switches being disposed between the charge-discharge conversion module (21) and the first plug (11), the first switch (221) and the second switch (222) being used for the charge-discharge conversion module (21) to form an electrical path with the first plug (11).
7. A bidirectional charging system as claimed in claim 6, characterized in that a third switch (223) and a fourth switch (224) of the first to seventh switches are provided between the charge-discharge conversion module (21) and the second plug (12), the third switch (223) and the fourth switch (224) being used for the charge-discharge conversion module (21) to form an electrical path with the second plug (12).
8. A bidirectional charging system as claimed in claim 6, characterized in that a fifth switch (225) of said first to seventh switches is used for turning on and off said switch assembly (22).
9. A bidirectional charging system as claimed in claim 6, wherein a sixth switch (226) and a seventh switch (227) of the first to seventh switches are provided between the charge-discharge conversion module (21) and the battery pack (3), and the sixth switch (226) and the seventh switch (227) are used for the charge-discharge conversion module (21) and the battery pack (3) to form an electric path.
10. A control method for a bidirectional charging system according to any one of claims 1 to 9, comprising the steps of:
judging whether the current working state of the battery pack is a to-be-charged state or a to-be-discharged state;
when the current working state is a state to be charged, a first switch, a second switch, a sixth switch and a seventh switch are turned on, and direct current is input to the integrated discharging device through a first plug;
converting the direct current charging into alternating current through a discharge conversion module and inputting the alternating current into a battery pack;
when the current working state is a state to be discharged, judging whether a fifth switch is turned on;
when the fifth switch is turned on, the third switch, the fourth switch, the sixth switch and the seventh switch are turned on, the first switch and the second switch are turned off simultaneously, and alternating current is input to the integrated discharging device through the second plug;
and converting the alternating current into direct current through a discharge conversion module and inputting the direct current into external equipment.
CN202010035603.0A 2020-01-14 2020-01-14 Bidirectional charging system and control method thereof Pending CN111098733A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010035603.0A CN111098733A (en) 2020-01-14 2020-01-14 Bidirectional charging system and control method thereof

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Application Number Priority Date Filing Date Title
CN202010035603.0A CN111098733A (en) 2020-01-14 2020-01-14 Bidirectional charging system and control method thereof

Publications (1)

Publication Number Publication Date
CN111098733A true CN111098733A (en) 2020-05-05

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103187762A (en) * 2011-12-31 2013-07-03 比亚迪股份有限公司 High power charging system for electric car and control method thereof
CN104253471A (en) * 2013-06-28 2014-12-31 比亚迪股份有限公司 Charging system and charging control method of electric vehicle
CN109484221A (en) * 2018-12-20 2019-03-19 华人运通控股有限公司 Electric car and the external charging method of electric car
CN208797654U (en) * 2018-09-21 2019-04-26 深圳市优必选科技有限公司 DC charger, direct current jack and DC charging system
CN110014977A (en) * 2017-08-15 2019-07-16 比亚迪股份有限公司 The on-board charging system and its control method of vehicle and vehicle
CN110614930A (en) * 2019-09-30 2019-12-27 重庆长安新能源汽车科技有限公司 Charging and discharging method, system, controller and electric automobile

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103187762A (en) * 2011-12-31 2013-07-03 比亚迪股份有限公司 High power charging system for electric car and control method thereof
CN104253471A (en) * 2013-06-28 2014-12-31 比亚迪股份有限公司 Charging system and charging control method of electric vehicle
CN110014977A (en) * 2017-08-15 2019-07-16 比亚迪股份有限公司 The on-board charging system and its control method of vehicle and vehicle
CN208797654U (en) * 2018-09-21 2019-04-26 深圳市优必选科技有限公司 DC charger, direct current jack and DC charging system
CN109484221A (en) * 2018-12-20 2019-03-19 华人运通控股有限公司 Electric car and the external charging method of electric car
CN110614930A (en) * 2019-09-30 2019-12-27 重庆长安新能源汽车科技有限公司 Charging and discharging method, system, controller and electric automobile

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