CN113246755A - Alternating-current charging control system for low-voltage battery of electric automobile - Google Patents

Alternating-current charging control system for low-voltage battery of electric automobile Download PDF

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Publication number
CN113246755A
CN113246755A CN202010085746.2A CN202010085746A CN113246755A CN 113246755 A CN113246755 A CN 113246755A CN 202010085746 A CN202010085746 A CN 202010085746A CN 113246755 A CN113246755 A CN 113246755A
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CN
China
Prior art keywords
interface
electrically connected
low
vehicle
voltage battery
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Pending
Application number
CN202010085746.2A
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Chinese (zh)
Inventor
刘铁山
韩玉涛
杜蓬
苗诗雨
谭洋
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Wuhan Lotus Cars Co Ltd
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Wuhan Lotus Cars Co Ltd
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Application filed by Wuhan Lotus Cars Co Ltd filed Critical Wuhan Lotus Cars Co Ltd
Priority to CN202010085746.2A priority Critical patent/CN113246755A/en
Publication of CN113246755A publication Critical patent/CN113246755A/en
Pending legal-status Critical Current

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    • 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
    • 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
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • 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
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to 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
    • Y02T10/70—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
    • 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

Abstract

The invention relates to a charging control system for a low-voltage battery of an electric automobile, which comprises a vehicle-mounted controller, a vehicle-mounted charger, an electric control switch, a low-voltage battery, a battery management system and a vehicle charging interface, wherein the vehicle-mounted controller and the vehicle-mounted charger are respectively connected with the low-voltage battery in series through the electric control switch; the vehicle charging interface comprises a CP interface, an L interface and an N interface, the CP interface is electrically connected with the vehicle-mounted controller, and the L interface and the N interface are electrically connected with the vehicle-mounted charger; the power supply equipment comprises a power supply controller, a CP joint terminal, an L joint terminal, an N joint terminal, a second relay and a third relay, wherein the power supply controller is connected with the CP joint terminal, one end of the second relay is electrically connected with the L joint terminal, and one end of the third relay is electrically connected with the N joint terminal. The invention can simply and conveniently charge the low-voltage battery with insufficient power through the external power supply equipment.

Description

Alternating-current charging control system for low-voltage battery of electric automobile
Technical Field
The invention relates to the technical field of electric automobiles, in particular to an alternating-current charging control system for a low-voltage battery of an electric automobile.
Background
With the trend of automobile electromotion, intellectualization and interconnection, the static power consumption of the electric automobile is remarkably increased, when the electric automobile has larger static power consumption, the low-voltage battery can not support the standby time of several weeks or longer like the traditional fuel oil vehicle, especially at low temperature, the charging and discharging efficiency of the low-voltage battery such as a lithium battery is very low, so that the charging amount is very small, and if the vehicle is placed for a long time, the low-voltage battery is inevitably insufficient, so that the vehicle can not be started.
In view of the above problems, some control strategies are implemented in 12V low-voltage lithium batteries in some host factories, for example, a relay or an MOS transistor is added, when a vehicle is placed for a long time, a BMS (Battery Management System) continuously monitors parameters such as temperature, SOC (state of Charge), and voltage of the low-voltage Battery, and at a specific temperature, when the SOC or the voltage is lower than a set value, a low-voltage power supply loop is disconnected through the relay or the MOS transistor, so that the entire vehicle enters a sleep mode when the power of the entire vehicle is cut off. When the vehicle needs to be used, the low-voltage battery is awakened, the whole vehicle is electrified, and then the vehicle is started. However, if the low-voltage battery has a very low electric quantity, the relay or the MOS transistor cannot be closed by the electric quantity of the low-voltage battery, and the low-voltage battery cannot be charged, so that the vehicle cannot be started.
In the prior art, a charging power source and a charging wire are often used for charging a low-voltage battery so as to start a vehicle, but the method is inconvenient for a user to operate.
Disclosure of Invention
The invention aims to provide an alternating-current charging control system for a low-voltage battery of an electric automobile, which aims to solve the technical problem that the low-voltage battery cannot be conveniently charged when the low-voltage battery cannot close a relay or an MOS (metal oxide semiconductor) tube through the electric quantity of the low-voltage battery in the prior art.
The invention provides an alternating-current charging control system for a low-voltage battery of an electric automobile, which comprises a vehicle-mounted controller, a vehicle-mounted charger, an electric control switch, a low-voltage battery, a battery management system and a vehicle charging interface, wherein the vehicle-mounted controller and the vehicle-mounted charger are respectively connected with the low-voltage battery in series through the electric control switch; the vehicle charging interface comprises a CP interface, an L interface and an N interface, the CP interface is electrically connected with the vehicle-mounted controller, and the L interface and the N interface are both electrically connected with the vehicle-mounted charger; the power supply equipment comprises a power supply controller, a CP connector terminal matched with the CP interface, an L connector terminal matched with the L interface, an N connector terminal matched with the N interface, a second relay and a third relay, wherein the power supply controller is connected to the CP connector terminal through a first switch, one ends of the second relay and the third relay are electrically connected to a high-voltage alternating-current power supply, the other end of the second relay is electrically connected to the L connector terminal, and the other end of the third relay is electrically connected to the N connector terminal.
Further, the vehicle charging interface further comprises a PE interface, the PE interface is connected with the ground, the power supply equipment further comprises a PE joint terminal matched with the PE interface, and the PE joint terminal is connected with the ground.
Further, the electric automobile also comprises a diode, wherein the anode of the diode is electrically connected with the CP interface, and the cathode of the diode is electrically connected with the vehicle-mounted controller.
Furthermore, the system further comprises a second resistor and a second switch, wherein one end of the second resistor is electrically connected with the cathode of the diode, the other end of the second resistor is electrically connected with one end of the second switch, and the other end of the second switch is electrically connected with the PE interface.
Furthermore, the system further comprises a third resistor, wherein one end of the third resistor is electrically connected with the cathode of the diode, and the other end of the third resistor is electrically connected with the PE interface.
Further, the system further comprises a CC interface, the vehicle-mounted controller is further electrically connected with the CC interface, the power supply equipment further comprises a third switch, a resistor capacitor and a CC joint terminal matched with the CC interface, one end of the third switch is electrically connected with the PE joint terminal, the other end of the third switch is electrically connected with one end of the resistor capacitor, and the other end of the resistor capacitor is electrically connected with the CC joint terminal.
Further, the power supply device further comprises a first resistor, one end of the first resistor is electrically connected with the first switch, and the other end of the first resistor is electrically connected with the CP connector terminal.
Furthermore, the system also comprises a shunt, one end of the shunt is electrically connected with the negative electrode of the battery, the other end of the shunt is respectively electrically connected with the vehicle-mounted controller and the vehicle-mounted charger, and the battery management system is also in communication connection with the shunt.
Further, the system also comprises a low-voltage load which is electrically connected with the low-voltage battery through the electric control switch.
The invention provides an electric automobile in a second aspect, which comprises any one of the electric automobile low-voltage battery alternating-current charging control systems.
Due to the technical scheme, the invention has the following beneficial effects:
when the low-voltage battery can not close the relay or the MOS tube through the electric quantity of the low-voltage battery, the relay or the MOS tube is controlled to be closed through the external power supply equipment, so that the low-voltage battery is charged, and the operation is simple and convenient.
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. 1-2 is a circuit structure diagram of an ac charging control system for a low-voltage battery of an electric vehicle according to an embodiment of the present invention (where a solid line in fig. 1 is a hard-line connection, and a dotted line is a communication connection);
fig. 3 is a schematic structural diagram of a terminal of a power supply device in an ac charging control system for a low-voltage battery of an electric vehicle according to an embodiment of the present invention.
In the drawings:
1-CP Tab terminals 21-L1 Tab terminals 22-L2 Tab terminals
23-L3 tab terminal 3-N tab terminal 4-PE tab terminal
5-CC joint terminal
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings 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. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The embodiment of the invention provides an alternating-current charging control system for a low-voltage battery of an electric automobile, which is shown in figures 1-2The vehicle-mounted low-voltage battery management system comprises a vehicle-mounted controller, a vehicle-mounted charger, an electric control switch, a low-voltage battery, a battery management system and a vehicle charging interface, wherein the vehicle-mounted controller and the vehicle-mounted charger are respectively connected with the low-voltage battery in series through the electric control switch; the vehicle charging interface comprises a CP interface, an L interface and an N interface, the CP interface is electrically connected with the vehicle-mounted controller, and the L interface and the N interface are both electrically connected with the vehicle-mounted charger; the power supply equipment comprises a power supply controller, a CP joint terminal matched with the CP interface, an L joint terminal matched with the L interface, an N joint terminal matched with the N interface, and a second relay K2And a third relay K3One end of the power supply controller passes through a first switch S1The other end of the power supply controller is connected to a high-voltage alternating-current power supply, and the second relay K2And the third relay K3Is electrically connected to a high voltage alternating current power supply, the second relay K2Is electrically connected to the L-terminal, the third relay K3And the other end thereof is electrically connected to the N-tab terminal.
In the embodiment of the invention, the electric control switch can be a first relay K1Or the MOS pipe, it is external power supply unit can be for charging the rifle, the CP interface is used for controlling the guide, the L interface is the live wire interface, the N interface is the zero line interface, the output power of on-vehicle machine that charges can be set for by the host computer factory according to the demand, and the mode of charging can be set for the constant voltage current-limiting.
In some embodiments, the vehicle charging interface further includes a PE interface, the PE interface is connected to ground, the power supply device further includes a PE joint terminal matched with the PE interface, the PE joint terminal is connected to ground, and the PE interface is a protective ground interface.
In some embodiments, the electricityThe motor vehicle also comprises a diode D1Said diode D1Is electrically connected with the CP interface, and the diode D1Is electrically connected with the vehicle-mounted controller.
In some embodiments, the system further comprises a second resistor R2And a second switch S2Said second resistance R2And the diode D1Is electrically connected to the negative pole of the second resistor R2And the other end of the second switch S2Is electrically connected to the second switch S2And the other end of the second connector is electrically connected with the PE interface.
In some embodiments, the system further comprises a third resistor R3Said third resistance R3And the diode D1Is electrically connected to the negative pole of the third resistor R3And the other end of the second connector is electrically connected with the PE interface.
In some embodiments, the system further comprises a CC interface, the onboard controller is further electrically connected with the CC interface, and the power supply device further comprises a third switch S3A resistance-capacitance RC and a CC connector terminal matched with the CC interface, and a third switch S3Is electrically connected to the PE connection terminal, and the third switch S3The other end of the resistor-capacitor-.
In some embodiments, the power supply device further comprises a first resistor R1The first resistor R1Is electrically connected to the first switch S1, the first resistor R1And the other end thereof is electrically connected to the CP terminal.
In some embodiments, the system further comprises a shunt, one end of the shunt is electrically connected to the negative electrode of the low-voltage battery, the other end of the shunt is electrically connected to the vehicle-mounted controller and the vehicle-mounted charger, respectively, and the battery management system is further in communication with the shunt.
In some embodiments, the systemThe low-voltage load is connected with the first relay K1Or the MOS tube is electrically connected with the low-voltage battery.
In practical application, the positive terminal of the low-voltage battery outputs low-voltage current, and the low-voltage current sequentially passes through the first relay or the MOS tube, the fuse, the low-voltage load and the shunt to flow to the negative electrode of the low-voltage battery, so that power is supplied to the low-voltage load.
In a specific embodiment, the vehicle charging interface is provided with a plurality of interfaces defined as shown in table 1, and accordingly, as shown in fig. 3, the power supply connector terminals of the power supply equipment include a CP connector terminal 1 matched with the CP interface, an L connector terminal matched with the L interface, an N connector terminal 3 matched with the N interface, a PE connector terminal 4 matched with the PE interface, and a CC connector terminal 5 matched with the CC interface, wherein the L connector terminals include an L1 connector terminal 21, an L2 connector terminal 22, and an L3 connector terminal 23.
Figure BDA0002381956270000061
In practical application, in an application scenario that the low-voltage battery enters the sleep state due to power shortage, after the power supply equipment is connected to the vehicle charging interface, the first switch S1And closing, namely, 12V low-voltage current is output to the vehicle-mounted controller through the CP joint terminal and the CP interface in sequence and is output to the battery management system through the vehicle-mounted controller, and the battery management system is electrified to send out closing of the first relay K1Or signals of MOS transistor, make the first relay K1Or the MOS tube is closed, meanwhile, the electric automobile and the power supply equipment also carry out message interaction, and after the handshake is successful, the second relay K of the power supply equipment2And a third relay K3When the power supply equipment is closed, the power supply equipment outputs high-voltage alternating current such as 220V alternating current to the vehicle-mounted charger, and the vehicle-mounted charger outputs 12V direct current to the low-voltage battery through direct current conversion of the vehicle-mounted charger, namely the low-voltage batteryAnd (5) charging the battery. When the electric quantity of the low-voltage battery is supplemented to a preset electric quantity value, the electric automobile is powered on at low voltage, and the electric automobile can be started and charged to a power battery of the electric automobile.
The embodiment of the invention also provides an electric automobile which comprises any one of the electric automobile low-voltage battery alternating-current charging control systems.
By implementing the alternating-current charging control system for the low-voltage battery of the electric automobile or the electric automobile, when the low-voltage battery cannot close the relay or the MOS tube through the electric quantity of the low-voltage battery, the relay or the MOS tube is controlled to be closed through the external power supply equipment, so that the low-voltage battery is charged, and the operation is simple and convenient.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The alternating-current charging control system for the low-voltage battery of the electric automobile is characterized by comprising a vehicle-mounted controller, a vehicle-mounted charger, an electric control switch, the low-voltage battery, a battery management system and a vehicle charging interface, wherein the vehicle-mounted controller and the vehicle-mounted charger are respectively connected with the low-voltage battery in series through the electric control switch;
the vehicle charging interface comprises a CP interface, an L interface and an N interface, the CP interface is electrically connected with the vehicle-mounted controller, and the L interface and the N interface are both electrically connected with the vehicle-mounted charger;
the power supply equipment comprises a power supply controller, a CP connector terminal matched with the CP interface, an L connector terminal matched with the L interface, an N connector terminal matched with the N interface, a second relay and a third relay, wherein the power supply controller is connected to the CP connector terminal through a first switch, one ends of the second relay and the third relay are electrically connected to a high-voltage alternating-current power supply, the other end of the second relay is electrically connected to the L connector terminal, and the other end of the third relay is electrically connected to the N connector terminal.
2. The alternating-current charging control system for the low-voltage battery of the electric automobile according to claim 1, wherein the vehicle charging interface further comprises a PE interface, the PE interface is connected to the ground, the power supply device further comprises a PE joint terminal matched with the PE interface, and the PE joint terminal is connected to the ground.
3. The alternating current charging control system for the low-voltage battery of the electric automobile as claimed in claim 1, wherein the electric automobile further comprises a diode, an anode of the diode is electrically connected with the CP interface, and a cathode of the diode is electrically connected with the vehicle-mounted controller.
4. The alternating-current charging control system for the low-voltage battery of the electric automobile according to claim 3, characterized in that the system further comprises a second resistor and a second switch, wherein one end of the second resistor is electrically connected with the negative electrode of the diode, the other end of the second resistor is electrically connected with one end of the second switch, and the other end of the second switch is electrically connected with the PE interface.
5. The alternating current charging control system for the low-voltage battery of the electric automobile according to claim 3, characterized in that the system further comprises a third resistor, one end of the third resistor is electrically connected with the negative electrode of the diode, and the other end of the third resistor is electrically connected with the PE interface.
6. The alternating-current charging control system for the low-voltage battery of the electric automobile according to claim 1, wherein the system further comprises a CC interface, the vehicle-mounted controller is further electrically connected with the CC interface, the power supply equipment further comprises a third switch, a resistor capacitor and a CC connector terminal matched with the CC interface, one end of the third switch is electrically connected with the PE connector terminal, the other end of the third switch is electrically connected with one end of the resistor capacitor, and the other end of the resistor capacitor is electrically connected with the CC connector terminal.
7. The alternating-current charging control system for the low-voltage battery of the electric automobile as claimed in claim 1, wherein the power supply device further comprises a first resistor, one end of the first resistor is electrically connected with the first switch, and the other end of the first resistor is electrically connected with the CP connector terminal.
8. The alternating current charging control system for the low-voltage battery of the electric automobile according to claim 1, wherein the system further comprises a shunt, one end of the shunt is electrically connected with the negative electrode of the low-voltage battery, the other end of the shunt is electrically connected with the vehicle-mounted controller and the vehicle-mounted charger respectively, and the battery management system is further in communication connection with the shunt.
9. The alternating current charging control system for the low-voltage battery of the electric automobile as claimed in claim 1, wherein the system further comprises a low-voltage load, and the low-voltage load is electrically connected with the low-voltage battery through the electronic control switch.
10. An electric vehicle, characterized in that the electric vehicle comprises an electric vehicle low-voltage battery alternating-current charging control system according to any one of claims 1 to 9.
CN202010085746.2A 2020-02-11 2020-02-11 Alternating-current charging control system for low-voltage battery of electric automobile Pending CN113246755A (en)

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