CN112217255A - Vehicle and charging control system thereof - Google Patents

Vehicle and charging control system thereof Download PDF

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Publication number
CN112217255A
CN112217255A CN202011049884.1A CN202011049884A CN112217255A CN 112217255 A CN112217255 A CN 112217255A CN 202011049884 A CN202011049884 A CN 202011049884A CN 112217255 A CN112217255 A CN 112217255A
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China
Prior art keywords
charging
vehicle
switch
charging condition
controller
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Granted
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CN202011049884.1A
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Chinese (zh)
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CN112217255B (en
Inventor
穆晓鹏
徐威
刘晓飞
夏修龙
何博
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Qingdao Teld New Energy Technology Co Ltd
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Qingdao Teld New Energy Technology Co Ltd
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Priority to CN202011049884.1A priority Critical patent/CN112217255B/en
Publication of CN112217255A publication Critical patent/CN112217255A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0036—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using connection detecting circuits
    • 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 application discloses charge control system includes: the positive pole is connected with the second end of the first switch, and the negative pole is grounded and is connected with the first end of the ground wire lap joint part; the first switch is connected with the positive pole of the vehicle-end energy storage device and the first end of the overlapping part of the positive pole line respectively; a second switch having a first end connected to the second end of the positive line overlapping part and a second end connected to the second end of the ground line overlapping part; first voltage detection means for detecting a voltage across the first constant current source; and the vehicle-end controller is used for determining that the first charging condition is met when the vehicle-end controller enters a first detection state and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, and sending a charging request to the charging-end controller after determining that the first charging condition is met so that the charging end starts to charge the vehicle-end energy storage device. By the aid of the scheme, good contact at the lap joint can be guaranteed during charging. The application also provides a vehicle with corresponding effects.

Description

Vehicle and charging control system thereof
Technical Field
The invention relates to the technical field of charging, in particular to a vehicle and a charging control system thereof.
Background
With the development of the vehicle industry, electric vehicles and hybrid vehicles are increasingly used to reduce environmental stress. In the use process of the vehicle, the charging device is required to be used for charging the energy storage device in the vehicle.
At present, when the lap joint of the charging device is connected with the lap joint of the vehicle, a user needs to judge whether the lap joint is connected well through experience, and therefore certain potential safety hazards exist. For example, if the lap joint is not completely overlapped, an electric spark may occur, and the charging voltage and the charging current of the vehicle are very large, which may cause more serious situations such as a fire and an electric shock.
In summary, how to effectively charge the vehicle and ensure good contact at the lap joint is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a vehicle and a charging control system thereof, which can effectively charge the vehicle and ensure good contact condition at a lap joint.
In order to solve the technical problems, the invention provides the following technical scheme:
a charge control system comprising:
the positive pole of the first constant current source is connected with the second end of the first switch, and the negative pole of the first constant current source is grounded and connected with the first end of the ground wire lap joint part;
the first switch is connected with the positive electrode of the vehicle-end energy storage device and the first end of the positive electrode circuit overlapping part at the first end;
a second switch having a first end connected to the second end of the positive line lap and a second end connected to the second end of the ground line lap;
first voltage detection means for detecting a terminal voltage of the first constant current source;
the vehicle-end controller is used for determining that a first charging condition is met when a first detection state is entered and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, and sending a charging request to the charging-end controller after determining that the first charging condition is met so that a charging end starts to charge the vehicle-end energy storage device;
wherein the first switch and the second switch are both in a closed state only when the end-of-vehicle controller enters a first detection state.
Preferably, the method further comprises the following steps:
the first end of the third switch is connected with the anode of the first constant current source, and the second end of the third switch is respectively connected with the cathode of the vehicle-end energy storage device and the first end of the overlapping part of the cathode line;
a fourth switch having a first end connected to the second end of the ground line lap and a second end connected to the second end of the negative line lap;
correspondingly, the vehicle end controller is specifically configured to:
when a first detection state is entered and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, determining that a first charging condition is satisfied; when the first charging condition is determined to be satisfied, the first detection state is entered, and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold; after the first charging condition and/or the second charging condition are determined to be satisfied, sending a charging request to a charging end controller so that a charging end starts to charge the vehicle end energy storage device;
wherein the third switch and the fourth switch are both in a closed state only when the end controller enters a second detection state.
Preferably, the method further comprises the following steps:
the positive pole of the second constant current source is connected with the first end of the fifth switch, and the negative pole of the second constant current source is grounded and connected with the first end of the ground wire lap joint part;
the second end of the fifth switch is respectively connected with the negative electrode of the vehicle-end energy storage device and the first end of the overlapping part of the negative electrode circuit;
a sixth switch having a first end connected to the second end of the ground line overlapping part and a second end connected to the second end of the negative line overlapping part;
second voltage detection means for detecting a terminal voltage of the second constant current source;
correspondingly, the vehicle end controller is specifically configured to:
when a first detection state is entered and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, determining that a first charging condition is satisfied; when the battery enters a second detection state and the terminal voltage detected by the second voltage detection device is lower than a preset second threshold value, determining that a second charging condition is met; after the first charging condition and/or the second charging condition are determined to be satisfied, sending a charging request to a charging end controller so that a charging end starts to charge the vehicle end energy storage device;
wherein the fifth switch and the sixth switch are both in a closed state only when the vehicle-end controller enters a second detection state.
Preferably, the method further comprises the following steps:
the positive pole of the third constant current source is connected with the second end of the seventh switch, and the negative pole of the third constant current source is connected with the second end of the ground wire lapping part;
the seventh switch, a first end of which is connected to the second end of the positive line overlapping part;
the first end of the eighth switch is respectively connected with the positive pole of the vehicle-end energy storage device and the first end of the positive pole line lap joint part, and the second end of the eighth switch is grounded and connected with the first end of the ground line lap joint part;
third voltage detection means for detecting a terminal voltage of the third constant current source;
correspondingly, the vehicle end controller is specifically configured to:
when a first detection state is entered and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, determining that a first charging condition is satisfied; when a third detection state is entered and the terminal voltage detected by the third voltage detection device is lower than the first threshold value, determining that a third charging condition is satisfied; after the first charging condition and/or the third charging condition are determined to be satisfied, sending a charging request to a charging end controller so that a charging end starts to charge the vehicle end energy storage device;
wherein the seventh switch and the eighth switch are both in a closed state only when the end-of-vehicle controller enters a third detection state.
Preferably, the method further comprises the following steps:
a ninth switch having a first end connected to the positive electrode of the third constant current source and a second end connected to the second end of the negative electrode line overlapping part;
a tenth switch having a first end grounded and connected to the first end of the ground wire overlapping portion, and a second end connected to a negative electrode of the vehicle-end energy storage device and the first end of the negative electrode line overlapping portion, respectively;
correspondingly, the vehicle end controller is specifically configured to:
when a first detection state is entered and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, determining that a first charging condition is satisfied; when a third detection state is entered and the terminal voltage detected by the third voltage detection device is lower than the first threshold value, determining that a third charging condition is satisfied; when a fourth detection state is entered and the terminal voltage detected by the third voltage detection device is lower than a preset second threshold value, determining that a fourth charging condition is satisfied; after the first charging condition and/or the third charging condition and/or the fourth charging condition are determined to be satisfied, sending a charging request to a charging terminal controller so that a charging terminal starts to charge the vehicle-terminal energy storage device;
wherein the ninth switch and the tenth switch are both in a closed state only when the vehicle end controller enters a fourth detection state.
Preferably, the method further comprises the following steps:
the positive pole of the fourth constant current source is connected with the first end of the eleventh switch, and the negative pole of the fourth constant current source is connected with the second end of the ground wire lapping part;
the eleventh switch is connected with the second end of the negative electrode circuit overlapping part at the second end;
a twelfth switch having a first end grounded and connected to the first end of the ground wire overlapping portion, and a second end connected to the negative electrode of the vehicle-end energy storage device and the first end of the negative electrode line overlapping portion, respectively;
fourth voltage detection means for detecting a terminal voltage of the fourth constant current source;
correspondingly, the vehicle end controller is specifically configured to:
when a first detection state is entered and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, determining that a first charging condition is satisfied; when a third detection state is entered and the terminal voltage detected by the third voltage detection device is lower than the first threshold value, determining that a third charging condition is satisfied; when a fourth detection state is entered and the terminal voltage detected by the fourth voltage detection device is lower than a preset second threshold value, determining that a fourth charging condition is satisfied; after the first charging condition and/or the third charging condition and/or the fourth charging condition are determined to be satisfied, sending a charging request to a charging terminal controller so that a charging terminal starts to charge the vehicle-terminal energy storage device;
wherein the eleventh switch and the twelfth switch are both in a closed state only when the vehicle-end controller enters a fourth detection state.
Preferably, the method further comprises the following steps:
the insulation detection device is used for detecting a first insulation resistance value between the positive electrode of the vehicle-end energy storage device and the ground wire and a second insulation resistance value between the negative electrode of the vehicle-end energy storage device and the ground wire;
the vehicle end controller is further configured to:
and when the first insulation resistance value or the second insulation resistance value is lower than a preset insulation threshold value, forbidding sending a charging request to the charging end controller.
Preferably, the vehicle end controller is further configured to:
after the first charging condition is determined to be not established, charging abnormity is determined, and when the charging abnormity frequency of the charging end reaches the preset alarm frequency, prompt information is sent to a control platform.
Preferably, the vehicle end controller is further configured to:
and receiving a signal which is sent by the control platform and carries the position information of one or more target charging terminals, so that the vehicle can go to any one of the target charging terminals for charging.
A vehicle comprising the charge control system of any one of the above.
By applying the technical scheme provided by the embodiment of the invention, the resistance is usually lower when the contact at the lap joint is good. Therefore, the first constant current source, the first switch and the second switch are arranged, specifically, the anode of the first constant current source is connected with the second end of the first switch, and the cathode of the first constant current source is grounded and connected with the first end of the ground wire lap joint part; the first end of the first switch is respectively connected with the positive pole of the vehicle-end energy storage device and the first end of the positive pole line overlapping part, the first end of the second switch is connected with the second end of the positive pole line overlapping part, and the second end of the second switch is connected with the second end of the ground line overlapping part. The first voltage detection device is used for detecting the terminal voltage of the first constant current source. The first switch and the second switch are both in a closed state only when the vehicle-end controller enters the first detection state. When the vehicle-end controller enters the first detection state, if the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, it can be generally determined that the current lap joint is good in contact, and therefore, after determining that the first charging condition is established, the vehicle-end controller can send a charging request to the charging-end controller so that the charging end starts to charge the vehicle-end energy storage device. To sum up, the scheme of this application can effectual guarantee when charging, the contact condition of overlap joint is good. Meanwhile, in the scheme of the application, only the first constant current source, the first switch, the second switch, the first voltage detection device and the vehicle-end controller are needed to be realized, the circuit structure is simple, the implementation is convenient, and the reliability is also high.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments 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 present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a first structure of a charge control system according to the present invention;
FIG. 2 is a schematic diagram of a second exemplary embodiment of a charging control system according to the present invention;
FIG. 3 is a schematic diagram of a third structure of the charging control system according to the present invention;
FIG. 4 is a schematic diagram of a fourth configuration of the charging control system according to the present invention;
FIG. 5 is a schematic diagram of a fifth configuration of the charging control system according to the present invention;
fig. 6 is a sixth structural schematic diagram of the charging control system according to the present invention;
fig. 7 is a schematic diagram of a seventh structure of the charge control system according to the present invention.
Detailed Description
The core of the invention is to provide a charging control system, which can effectively ensure that the contact condition of the lap joint is good during charging, and has the advantages of simple circuit structure, convenient implementation and higher reliability.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a charging control system according to the present invention, which may include:
a first constant current source I1 having a positive electrode connected to the second end of the first switch K1 and a negative electrode grounded and connected to the first end of the ground strap 20;
a first switch K1 having a first end connected to the positive electrode of the vehicle-end energy storage device and the first end of the positive electrode line lap 10, respectively;
a second switch K2 having a first end connected to the second end of the positive line strap 10 and a second end connected to the second end of the ground wire strap 20;
first voltage detection means for detecting a terminal voltage of the first constant current source I1;
the vehicle-end controller is used for determining that a first charging condition is established when a first detection state is entered and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, and sending a charging request to the charging-end controller after the first charging condition is determined to be established so that the charging end starts to charge the vehicle-end energy storage device;
the first switch K1 and the second switch K2 are both in a closed state only when the vehicle end controller enters the first detection state.
Specifically, in the solution of the present application, the specific device type of the first switch K1 may be set and adjusted according to actual needs, for example, the device may be a MOS transistor, an IGBT, or the like, and certainly, the first switch K1 may also be a first switch K1 composed of a plurality of devices, that is, the first switch K1 of the present application is composed of one switch circuit, which does not affect the implementation of the present application, as long as the function of the first switch K1 of the present application can be completed, that is, the switching between the open state and the closed state may be performed as needed under the control of the vehicle-end controller. Typically, the first switch K1 is in an open state by default. The second switch K2 and the switches in the following embodiments are the same, and will not be described again.
The selection of specific devices of the first voltage detection device and the vehicle-end controller can also be set and selected according to actual needs, as can other voltage detection devices in the following embodiments, and the voltage detection device and the vehicle-end controller are not shown in the drawings of the present application.
It can be known from the circuit connection relationship that when the vehicle end controller enters the first detection state, the first switch K1 and the second switch K2 are both in the closed state, at this time, the current can flow out from the positive pole of the first constant current source I1, and sequentially passes through the first switch K1, the positive pole line junction 10, the second switch K2, the ground line junction 20, and then returns to the negative pole of the first constant current source I1, and the terminal voltage of the first constant current source I1 detected by the first voltage detection device is the voltage formed by the positive pole line junction 10 and the ground line junction 20. That is, at this time, the terminal voltage of the first constant current source I1 detected by the first voltage detection device can reflect whether the positive line lap 10 and the ground line lap 20 are in good contact.
It should be emphasized that the terminal voltage of the first constant current source I1 detected by the first voltage detection device can reflect whether the positive wire overlapping part 10 and the ground wire overlapping part 20 are in good contact, but the negative wire overlapping part 30 is not involved, because the present application considers that if the overlapping parts are not in good contact, the resistances of the positive wire overlapping part 10, the ground wire overlapping part 20 and the negative wire overlapping part 30 are all abnormal under normal conditions, or at least two of the two parts are abnormal, and a single-part resistance abnormality rarely occurs, which is also caused by a mechanical structure. Therefore, the embodiment of the present application only needs to consider the resistance conditions of the positive line lap 10 and the ground line lap 20, and can generally reflect whether the whole lap is in good contact, so that the embodiment of the present application has low cost and needs a small number of devices. Specifically, the implementation mode can be realized only by the first constant current source I1, the first switch K1, the second switch K2, the first voltage detection device and the vehicle-end controller, and the circuit is simple in structure, convenient to implement and high in reliability.
It should be noted that, when the vehicle-end controller enters the first detection state, and in the subsequent embodiments, when the vehicle-end controller enters the second detection state, the third detection state, and the fourth detection state, the power supply terminal is not charged, so that the backflow condition possibly caused to the constant current source is avoided.
When the vehicle-end controller enters the first detection state, if the terminal voltage detected by the first voltage detection device is lower than the preset first threshold value, it indicates that the positive line lap joint part 10 and the ground line lap joint part 20 are in good contact, the embodiment of the application can determine that the whole lap joint is in good contact, so that the vehicle-end controller can send a charging request to the charging-end controller after determining that the first charging condition is met, so that the charging end starts to charge the vehicle-end energy storage device.
In addition, in practical application, when the charging terminal receives a charging request sent by the charging terminal controller, the charging terminal may start charging immediately, or may be set to include some other operations, for example, it is set that the charging terminal itself also needs to perform a self-checking operation, and the charging terminal charges the vehicle-side energy storage device after determining that the charging terminal itself is normal.
In the drawings of the present application, the positive pole of the end energy storage device is denoted as DC +, the negative pole is denoted as DC-, and the ground line is denoted as PE. In the drawing of this application promptly, all be that the left end is used for connecting the car end, and the right-hand member is used for connecting the end that charges.
Further, referring to fig. 2, in an embodiment of the present invention, the method may further include:
a third switch K3, the first end of which is connected with the anode of the first constant current source I1, and the second end of which is connected with the cathode of the vehicle-end energy storage device and the first end of the cathode line lapping part 30;
a fourth switch K4 having a first end connected to the second end of the ground strap 20 and a second end connected to the second end of the negative electrode wire strap 30;
correspondingly, the vehicle end controller is specifically used for:
when the first detection state is entered and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, determining that a first charging condition is established; when the first charging condition is determined to be satisfied, the first detection state is entered, and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold; after the first charging condition and/or the second charging condition are determined to be satisfied, sending a charging request to a charging end controller to enable a charging end to start charging an energy storage device at a vehicle end;
wherein the third switch K3 and the fourth switch K4 are both in the closed state only when the vehicle end controller enters the second detection state.
As described in the foregoing embodiment, in the first detection state, the terminal voltage detected by the first voltage detection means reflects whether the positive electrode line lap 10 and the ground line lap 20 are in good contact or not, without referring to the negative electrode line lap 30, and in this embodiment, in order to ensure that the entire lap is in good contact, a third switch K3 and a fourth switch K4 are further provided.
As can be seen from the circuit structure, in the second detection state, the current can flow from the positive electrode of the first constant current source I1, sequentially pass through the third switch K3, the negative electrode line bridging portion 30, the fourth switch K4, and the ground wire bridging portion 20, and then return to the negative electrode of the first constant current source I1. At this time, the terminal voltage of the first constant current source I1 detected by the first voltage detection device can reflect whether the negative electrode wire lap 30 and the ground wire lap 20 are in good contact.
In this embodiment, it is specifically set that the charging is permitted, that is, the charging request is transmitted to the charging side controller, after it is determined that both the first charging condition and the second charging condition are satisfied, or the charging is permitted and the charging request is transmitted to the charging side controller when either one of the first charging condition and the second charging condition is satisfied.
Two kinds of settlement modes respectively have advantages, and the first is favorable to ensureing the security, and first condition of charging and second condition of charging all are established, can reflect anodal circuit overlap joint portion 10, and ground wire overlap joint portion 20 and negative pole circuit overlap joint portion 30 all contact well, compare in fig. 1, can avoid some special circumstances only anodal circuit overlap joint portion 10 and ground wire overlap joint portion 20 contact well and the charging accident that leads to. In the second setting, in some cases, for example, when the first charging condition is not satisfied, it may be that the first switch K1 or the second switch K2 itself is abnormal due to contact abnormality at the lap, and as described above, when the contact at the lap is poor, at least two of the positive electrode line lap 10, the ground line lap 20, and the negative electrode line lap 30 are abnormal in resistance, so that when any one of the first charging condition and the second charging condition is satisfied, the charging is allowed, which is favorable for reducing the probability of occurrence of a misrecognition, that is, the lap where the contact is normal is mistaken as abnormal.
In an embodiment of the present invention, referring to fig. 3, the method may further include:
a second constant current source I2 having a positive electrode connected to the first end of the fifth switch K5 and a negative electrode grounded and connected to the first end of the ground strap 20;
a fifth switch K5 having a second end connected to the negative electrode of the vehicle-end energy storage device and the first end of the negative electrode line lap 30, respectively;
a sixth switch K6 having a first end connected to the second end of the ground strap 20 and a second end connected to the second end of the negative wire strap 30;
second voltage detection means for detecting a terminal voltage of the second constant current source I2;
correspondingly, the vehicle end controller is specifically used for:
when the first detection state is entered and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, determining that a first charging condition is established; when the battery enters a second detection state and the terminal voltage detected by the second voltage detection device is lower than a preset second threshold value, determining that a second charging condition is met; after the first charging condition and/or the second charging condition are determined to be satisfied, sending a charging request to a charging end controller to enable a charging end to start charging an energy storage device at a vehicle end;
wherein, the fifth switch K5 and the sixth switch K6 are both in the closed state only when the vehicle end controller enters the second detection state.
The embodiment of fig. 3 is similar in principle to the embodiment of fig. 2, but the embodiment of fig. 3 is additionally provided with a second constant current source I2, and a second voltage detection device for detecting the terminal voltage of the second constant current source I2 needs to be configured. Therefore, the embodiment of fig. 2 is lower in cost than the embodiment of fig. 3, but the embodiment of fig. 3 can avoid the situation where the solution cannot be implemented due to the failure of the single constant current source, and particularly, when the vehicle-side controller transmits a charging request to the charging-side controller when the first charging condition or the second charging condition is set to be satisfied, the embodiment of fig. 3 is selected, thereby avoiding the situation where the erroneous determination is caused by the single constant current source. When the first charging condition and the second charging condition are both set to be satisfied to allow charging, the embodiment shown in fig. 2 is usually selected, so that the cost is reduced, and the low number of devices is also beneficial to improving the reliability of the circuit.
Referring to fig. 4, in an embodiment of the present invention, the method may further include:
a third constant current source I3 having a positive electrode connected to the second end of the seventh switch K7 and a negative electrode connected to the second end of the ground connection 20;
a seventh switch K7 having a first end connected to the second end of the positive electrode line strap 10;
an eighth switch K8 having a first end connected to the positive electrode of the vehicle-end energy storage device and the first end of the positive electrode line lap 10, and a second end connected to the ground line lap 20;
third voltage detection means for detecting a terminal voltage of the third constant current source I3;
correspondingly, the vehicle end controller is specifically used for:
when the first detection state is entered and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, determining that a first charging condition is established; when the third detection state is entered and the terminal voltage detected by the third voltage detection device is lower than the first threshold value, determining that a third charging condition is satisfied; after the first charging condition and/or the third charging condition are determined to be satisfied, sending a charging request to a charging end controller to enable a charging end to start charging an energy storage device at a vehicle end;
wherein, the seventh switch K7 and the eighth switch K8 are both in the closed state only when the vehicle end controller enters the third detection state.
In the embodiment of fig. 4, it is considered that the detection can be performed not only at the vehicle end but also at the charging end. Specifically, in the third detection state, the current may flow from the positive electrode of the third constant current source I3, sequentially through the seventh switch K7, the positive electrode line junction 10, the eighth switch K8, and the ground junction 20, and then return to the negative electrode of the third constant current source I3. At this time, the terminal voltage of the third constant current source I3 detected by the third voltage detection device can reflect whether the positive electrode line lap 10 and the ground line lap 20 are in good contact or not.
According to actual needs, the vehicle-end controller may be set to send the charging request to the charging-end controller only after determining that both the first charging condition and the third charging condition are satisfied, or may be set to have any one of the first charging condition and the third charging condition satisfied, and the vehicle-end controller may send the charging request to the charging-end controller. The former setting mode is favorable for guaranteeing the safety, namely, the first charging condition and the third charging condition are both established, so that the positive line overlapping part 10 and the ground line overlapping part 20 can be accurately reflected to be in good contact normally, and the charging safety is guaranteed. The latter setting can avoid the misjudgment caused by the abnormality of the first constant current source I1, the first switch K1 and other devices. The two setting modes can be selected and adjusted according to actual needs, and the implementation of the invention is not influenced.
Referring to fig. 5, in an embodiment of the present invention, the method may further include:
a ninth switch K9 having a first end connected to the positive electrode of the third constant current source I3 and a second end connected to the second end of the negative line strap 30;
a tenth switch K10 having a first end grounded and connected to the first end of the ground wire lap 20 and a second end connected to the negative electrode of the vehicle-end energy storage device and the first end of the negative electrode line lap 30, respectively;
correspondingly, the vehicle end controller is specifically used for:
when the first detection state is entered and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, determining that a first charging condition is established; when the third detection state is entered and the terminal voltage detected by the third voltage detection device is lower than the first threshold value, determining that a third charging condition is satisfied; when the fourth detection state is entered and the terminal voltage detected by the third voltage detection device is lower than a preset second threshold value, determining that a fourth charging condition is satisfied; after the first charging condition and/or the third charging condition and/or the fourth charging condition are determined to be satisfied, sending a charging request to a charging end controller to enable a charging end to start charging an energy storage device at a vehicle end;
wherein, the ninth switch K9 and the tenth switch K10 are both in the closed state only when the vehicle-end controller enters the fourth detection state.
In the embodiment of fig. 5, it is considered that whether the negative electrode terminal 30 and the ground terminal 20 are in good contact or not may be detected at the charging terminal. Specifically, in the fourth detection state, the current may flow from the positive electrode of the third constant current source I3, sequentially pass through the ninth switch K9, the negative line strap 30, the tenth switch K10, the ground wire strap 20, and then return to the negative electrode of the third constant current source I3. At this time, the terminal voltage of the third constant current source I3 detected by the third voltage detection device can reflect whether the negative electrode path overlapping part 30 and the ground path overlapping part 20 are in good contact or not.
In addition, for the first charging condition, the third charging condition and the fourth charging condition, whether the charging is allowed only when all the conditions are satisfied or whether one or more conditions are satisfied may be selected according to actual needs.
In addition, in practical applications, an embodiment in which 4 charging conditions need to be determined is widely selected, for example, the embodiment of fig. 7, or an embodiment in which the first constant current source I1 and the second constant current source I2 in fig. 7 are implemented by one constant current source, and the third constant current source I3 and the fourth constant current source I4 are implemented by one constant current source.
In the embodiment requiring 4 charging conditions, that is, the vehicle-end controller needs to determine whether the first charging condition, the second charging condition, the third charging condition, and the fourth charging condition are satisfied. There are two common settings, one is that these four charging conditions need to be satisfied, which can ensure sufficient charging safety. The other is to set that the first charging condition and the second charging condition are both established, or the third charging condition and the fourth charging condition are both established, so that charging is allowed.
In an embodiment of the present invention, referring to fig. 6, the method may further include:
a fourth constant current source I4 having a positive electrode connected to the first end of the eleventh switch K11 and a negative electrode connected to the second end of the ground connection 20;
an eleventh switch K11 having a second end connected to the second end of the negative electrode line strap 30;
a twelfth switch K12 having a first end grounded and connected to the first end of the connection portion of the ground wire bridging portion 20 and a second end connected to the negative electrode of the vehicle-end energy storage device and the first end of the negative electrode line bridging portion 30, respectively;
fourth voltage detection means for detecting a terminal voltage of the fourth constant current source I4;
correspondingly, the vehicle end controller is specifically used for:
when the first detection state is entered and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, determining that a first charging condition is established; when the third detection state is entered and the terminal voltage detected by the third voltage detection device is lower than the first threshold value, determining that a third charging condition is satisfied; when the fourth detection state is entered and the terminal voltage detected by the fourth voltage detection device is lower than a preset second threshold value, determining that a fourth charging condition is satisfied; after the first charging condition and/or the third charging condition and/or the fourth charging condition are determined to be satisfied, sending a charging request to a charging end controller to enable a charging end to start charging an energy storage device at a vehicle end;
wherein, the eleventh switch K11 and the twelfth switch K12 are both in the closed state only when the vehicle-end controller enters the fourth detection state.
Compared with the embodiment of fig. 5, in this embodiment, 2 constant current sources, that is, the third constant current source I3 and the fourth constant current source I4, are provided at the charging terminal, so that it is possible to avoid the situation that the scheme cannot be implemented due to the failure of the third constant current source I3, and in particular, in the case where only one of the third charging condition and the fourth charging condition needs to be satisfied, this embodiment can be selected. Of course, when it is set that both the third charging condition and the fourth charging condition need to be satisfied, this embodiment may be selected without affecting the implementation of the embodiment.
In an embodiment of the present invention, the method may further include:
the insulation detection device 40 is used for detecting a first insulation resistance value between the positive electrode of the vehicle-end energy storage device and the ground wire and a second insulation resistance value between the negative electrode of the vehicle-end energy storage device and the ground wire;
the vehicle end controller is also used for:
and when the first insulation resistance value or the second insulation resistance value is lower than a preset insulation threshold value, forbidding sending of a charging request to the charging end controller.
In the embodiment of fig. 7, an insulation detection device 40 is further provided, and the specific configuration of the insulation detection device 40 may be set and adjusted as necessary, and the object of the present application may be achieved, for example, in the embodiment of fig. 7, the insulation detection device 40 is configured by an insulation detection circuit and switches SJ1 and SJ2, and SJ1 and SJ2 are closed only when the insulation detection circuit is operated.
When the first insulation resistance value or the second insulation resistance value is lower than the preset insulation threshold value, the insulation is unqualified, and the vehicle-end controller prohibits sending a charging request to the charging-end controller, so that the charging safety is further guaranteed.
The insulation detection may be performed before the resistance detection of the lap joint in the above embodiment, or after the resistance detection of the lap joint and before the start of charging, without affecting the practice of the present invention.
In addition, the insulation threshold, the first threshold, the second threshold and the preset alarm times in the following embodiments in the scheme of the application can be set and adjusted according to actual conditions.
In an embodiment of the present invention, the vehicle-end controller is further configured to:
and after the first charging condition is determined to be not established, determining that the charging is abnormal, and sending prompt information to the control platform when the charging abnormal frequency of the charging terminal reaches the preset alarm frequency.
When the number of times of charging abnormity of the charging end reaches the preset alarm number of times, the problem that the charging is not the lap joint is described, or the poor contact condition of the lap joint cannot be avoided, so that the vehicle end controller sends prompt information to the control platform, and related operation and maintenance personnel can timely know the information and then timely go to the field maintenance.
It should be noted that this embodiment is described with respect to the scheme of fig. 1, that is, after determining that the first charging condition is not satisfied, determining that the charging is abnormal. In the foregoing other embodiments, some of the charging conditions are not only determined, but it is understood that as long as the vehicle-end controller determines that the charging request can be sent to the charging-end controller, the vehicle-end controller allows charging, otherwise, the vehicle-end controller does not allow charging, and the charging request cannot be sent to the charging-end controller, and at this time, the vehicle-end controller may determine that charging is abnormal. In addition, in the case where the charging terminal also needs to perform self-detection, for example, the self-test of the charging terminal itself fails, it is considered that the charging is abnormal, and the number of times of performing is accumulated. When the accumulated times reach the alarm times, prompt information can be sent to the control platform.
In an embodiment of the present invention, the vehicle-end controller may further be configured to:
and receiving a signal which is sent by the control platform and carries the position information of one or more target charging terminals, so that the vehicle can go to any one target charging terminal for charging.
After a certain charging end cannot be charged, in the implementation mode, the control platform can send a signal carrying position information of one or more target charging ends to the vehicle-end controller, so that a user can conveniently and quickly know a new chargeable place. This embodiment is particularly effective for autonomous vehicles.
Corresponding to the above embodiment of the charging control system, the embodiment of the present invention further provides a vehicle, which may include the charging control system in any of the above embodiments, and reference may be made to the above embodiments correspondingly, and a description thereof is not repeated here.
By applying the technical scheme provided by the embodiment of the invention, the resistance is usually lower when the contact at the lap joint is good. Therefore, the first constant current source, the first switch and the second switch are arranged, specifically, the anode of the first constant current source is connected with the second end of the first switch, and the cathode of the first constant current source is grounded and connected with the first end of the ground wire lap joint part; the first end of the first switch is respectively connected with the positive pole of the vehicle-end energy storage device and the first end of the positive pole line overlapping part, the first end of the second switch is connected with the second end of the positive pole line overlapping part, and the second end of the second switch is connected with the second end of the ground line overlapping part. The first voltage detection device is used for detecting the terminal voltage of the first constant current source. The first switch and the second switch are both in a closed state only when the vehicle-end controller enters the first detection state. When the vehicle-end controller enters the first detection state, if the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, it can be generally determined that the current lap joint is good in contact, and therefore, after determining that the first charging condition is established, the vehicle-end controller can send a charging request to the charging-end controller so that the charging end starts to charge the vehicle-end energy storage device. To sum up, the scheme of this application can effectual guarantee when charging, the contact condition of overlap joint is good. Meanwhile, in the scheme of the application, only the first constant current source, the first switch, the second switch, the first voltage detection device and the vehicle-end controller are needed to be realized, the circuit structure is simple, the implementation is convenient, and the reliability is also high.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The principle and the implementation of the present invention are explained in the present application by using specific examples, and the above description of the embodiments is only used to help understanding the technical solution and the core idea of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (10)

1. A charge control system, comprising:
the positive pole of the first constant current source is connected with the second end of the first switch, and the negative pole of the first constant current source is grounded and connected with the first end of the ground wire lap joint part;
the first switch is connected with the positive electrode of the vehicle-end energy storage device and the first end of the positive electrode circuit overlapping part at the first end;
a second switch having a first end connected to the second end of the positive line lap and a second end connected to the second end of the ground line lap;
first voltage detection means for detecting a terminal voltage of the first constant current source;
the vehicle-end controller is used for determining that a first charging condition is met when a first detection state is entered and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, and sending a charging request to the charging-end controller after determining that the first charging condition is met so that a charging end starts to charge the vehicle-end energy storage device;
wherein the first switch and the second switch are both in a closed state only when the end-of-vehicle controller enters a first detection state.
2. The charge control system according to claim 1, characterized by further comprising:
the first end of the third switch is connected with the anode of the first constant current source, and the second end of the third switch is respectively connected with the cathode of the vehicle-end energy storage device and the first end of the overlapping part of the cathode line;
a fourth switch having a first end connected to the second end of the ground line lap and a second end connected to the second end of the negative line lap;
correspondingly, the vehicle end controller is specifically configured to:
when a first detection state is entered and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, determining that a first charging condition is satisfied; when the first charging condition is determined to be satisfied, the first detection state is entered, and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold; after the first charging condition and/or the second charging condition are determined to be satisfied, sending a charging request to a charging end controller so that a charging end starts to charge the vehicle end energy storage device;
wherein the third switch and the fourth switch are both in a closed state only when the end controller enters a second detection state.
3. The charge control system according to claim 1, characterized by further comprising:
the positive pole of the second constant current source is connected with the first end of the fifth switch, and the negative pole of the second constant current source is grounded and connected with the first end of the ground wire lap joint part;
the second end of the fifth switch is respectively connected with the negative electrode of the vehicle-end energy storage device and the first end of the overlapping part of the negative electrode circuit;
a sixth switch having a first end connected to the second end of the ground line overlapping part and a second end connected to the second end of the negative line overlapping part;
second voltage detection means for detecting a terminal voltage of the second constant current source;
correspondingly, the vehicle end controller is specifically configured to:
when a first detection state is entered and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, determining that a first charging condition is satisfied; when the battery enters a second detection state and the terminal voltage detected by the second voltage detection device is lower than a preset second threshold value, determining that a second charging condition is met; after the first charging condition and/or the second charging condition are determined to be satisfied, sending a charging request to a charging end controller so that a charging end starts to charge the vehicle end energy storage device;
wherein the fifth switch and the sixth switch are both in a closed state only when the vehicle-end controller enters a second detection state.
4. The charge control system according to claim 1, characterized by further comprising:
the positive pole of the third constant current source is connected with the second end of the seventh switch, and the negative pole of the third constant current source is connected with the second end of the ground wire lapping part;
the seventh switch, a first end of which is connected to the second end of the positive line overlapping part;
the first end of the eighth switch is respectively connected with the positive pole of the vehicle-end energy storage device and the first end of the positive pole line lap joint part, and the second end of the eighth switch is grounded and connected with the first end of the ground line lap joint part;
third voltage detection means for detecting a terminal voltage of the third constant current source;
correspondingly, the vehicle end controller is specifically configured to:
when a first detection state is entered and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, determining that a first charging condition is satisfied; when a third detection state is entered and the terminal voltage detected by the third voltage detection device is lower than the first threshold value, determining that a third charging condition is satisfied; after the first charging condition and/or the third charging condition are determined to be satisfied, sending a charging request to a charging end controller so that a charging end starts to charge the vehicle end energy storage device;
wherein the seventh switch and the eighth switch are both in a closed state only when the end-of-vehicle controller enters a third detection state.
5. The charge control system according to claim 4, characterized by further comprising:
a ninth switch having a first end connected to the positive electrode of the third constant current source and a second end connected to the second end of the negative electrode line overlapping part;
a tenth switch having a first end grounded and connected to the first end of the ground wire overlapping portion, and a second end connected to a negative electrode of the vehicle-end energy storage device and the first end of the negative electrode line overlapping portion, respectively;
correspondingly, the vehicle end controller is specifically configured to:
when a first detection state is entered and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, determining that a first charging condition is satisfied; when a third detection state is entered and the terminal voltage detected by the third voltage detection device is lower than the first threshold value, determining that a third charging condition is satisfied; when a fourth detection state is entered and the terminal voltage detected by the third voltage detection device is lower than a preset second threshold value, determining that a fourth charging condition is satisfied; after the first charging condition and/or the third charging condition and/or the fourth charging condition are determined to be satisfied, sending a charging request to a charging terminal controller so that a charging terminal starts to charge the vehicle-terminal energy storage device;
wherein the ninth switch and the tenth switch are both in a closed state only when the vehicle end controller enters a fourth detection state.
6. The charge control system according to claim 4, characterized by further comprising:
the positive pole of the fourth constant current source is connected with the first end of the eleventh switch, and the negative pole of the fourth constant current source is connected with the second end of the ground wire lapping part;
the eleventh switch is connected with the second end of the negative electrode circuit overlapping part at the second end;
a twelfth switch having a first end grounded and connected to the first end of the ground wire overlapping portion, and a second end connected to the negative electrode of the vehicle-end energy storage device and the first end of the negative electrode line overlapping portion, respectively;
fourth voltage detection means for detecting a terminal voltage of the fourth constant current source;
correspondingly, the vehicle end controller is specifically configured to:
when a first detection state is entered and the terminal voltage detected by the first voltage detection device is lower than a preset first threshold value, determining that a first charging condition is satisfied; when a third detection state is entered and the terminal voltage detected by the third voltage detection device is lower than the first threshold value, determining that a third charging condition is satisfied; when a fourth detection state is entered and the terminal voltage detected by the fourth voltage detection device is lower than a preset second threshold value, determining that a fourth charging condition is satisfied; after the first charging condition and/or the third charging condition and/or the fourth charging condition are determined to be satisfied, sending a charging request to a charging terminal controller so that a charging terminal starts to charge the vehicle-terminal energy storage device;
wherein the eleventh switch and the twelfth switch are both in a closed state only when the vehicle-end controller enters a fourth detection state.
7. The charge control system according to claim 1, characterized by further comprising:
the insulation detection device is used for detecting a first insulation resistance value between the positive electrode of the vehicle-end energy storage device and the ground wire and a second insulation resistance value between the negative electrode of the vehicle-end energy storage device and the ground wire;
the vehicle end controller is further configured to:
and when the first insulation resistance value or the second insulation resistance value is lower than a preset insulation threshold value, forbidding sending a charging request to the charging end controller.
8. The charging control system of claim 1, wherein the vehicle-end controller is further configured to:
after the first charging condition is determined to be not established, charging abnormity is determined, and when the charging abnormity frequency of the charging end reaches the preset alarm frequency, prompt information is sent to a control platform.
9. The charging control system of claim 8, wherein the vehicle-end controller is further configured to:
and receiving a signal which is sent by the control platform and carries the position information of one or more target charging terminals, so that the vehicle can go to any one of the target charging terminals for charging.
10. A vehicle characterized by comprising the charge control system according to any one of claims 1 to 9.
CN202011049884.1A 2020-09-29 2020-09-29 Vehicle and charging control system thereof Active CN112217255B (en)

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