CN215705710U - Charging control circuit of new energy electric bus and new energy electric bus - Google Patents

Charging control circuit of new energy electric bus and new energy electric bus Download PDF

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Publication number
CN215705710U
CN215705710U CN202121842697.9U CN202121842697U CN215705710U CN 215705710 U CN215705710 U CN 215705710U CN 202121842697 U CN202121842697 U CN 202121842697U CN 215705710 U CN215705710 U CN 215705710U
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China
Prior art keywords
relay
fuse
power supply
plug
new energy
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CN202121842697.9U
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Chinese (zh)
Inventor
霍刚
赵忠民
闫建彬
薛红丽
李文轩
张博
孙志龙
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Yanbian Guotai New Energy Vehicle Co ltd
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Yanbian Guotai New Energy Vehicle Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02T90/12—Electric charging stations
    • 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
    • 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
    • Y02T90/16—Information or communication technologies improving the operation of electric vehicles

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  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The utility model discloses a new energy electric bus and a charge control circuit of the new energy electric bus, which comprise a storage battery, a mechanical switch, a first fuse, a second fuse, a third fuse, a fourth fuse, a conversion relay, a power supply relay, a wake-up plug-in and a power supply plug-in.

Description

Charging control circuit of new energy electric bus and new energy electric bus
Technical Field
The utility model belongs to the field of new energy automobiles, and particularly relates to a charging control circuit of a new energy electric bus and a new energy electric road vehicle.
Background
With the continuous exhaustion of petroleum resources and the continuous deterioration of global environmental pollution, the traditional fuel vehicles are gradually exiting from the historical stage, the development of new energy vehicles is trend, wherein new energy electric buses and new energy electric buses have been rapidly developed in recent years, the problem of safe charging of power batteries is the most important of the design links, and the early new energy electric buses and new energy electric buses are generally charged by adopting a closed mechanical switch.
Because the BMS is required to be in a working state during charging, and in addition, the vehicle is required to upload real-time data during charging according to the national standard, and further, instruments, TBOX and DC/DC are required to be in a wake-up state during charging, early new energy vehicles generally charge closed mechanical switches so as to ensure that the storage battery can provide a power supply and a wake-up power supply for the electric equipment.
With the continuous development of the industry technology, the defects of the charging of the closed mechanical switch are gradually revealed, after the vehicle enters the garage, in order to ensure that the vehicle is charged, a driver can not disconnect the mechanical switch after leaving the vehicle, after the charging is finished, the charging pile automatically stops supplying power, the DC/DC of the whole vehicle also stops working, the storage battery loses a power supply, the mechanical switch is still in a closed state at the moment, all unnecessary electric equipment of the new energy vehicle continues working, so that the service life of the unnecessary electric equipment is reduced, meanwhile, the use safety of the vehicle can be reduced, the storage battery is a power type battery and is in a working state for a long time, voltage reduction and starting difficulty are easily caused, the service life of the storage battery can be damaged under a low-temperature environment, and in order to solve the problem, a specially-assigned person must be arranged to timely close a mechanical switch after charging is completed, but the labor cost is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems and provides an off mechanical switch control circuit which can charge and upload real-time data of a new energy automobile when a mechanical switch is off, can not charge the new energy automobile when the mechanical switch is on, and can ensure that the new energy automobile uploads the real-time data when the new energy automobile is in a charging state required by national standards.
The technical scheme of the utility model is that,
a charging control circuit of a new energy electric bus and a new energy electric bus comprises a storage battery, a mechanical switch, a first fuse, a second fuse, a third fuse, a fourth fuse, a transfer relay, a power supply relay, a wake-up plug-in and a power supply plug-in, wherein a positive power supply of the storage battery is respectively connected with a first coil input end of the transfer relay and a second normally closed contact of the power supply relay through the mechanical switch and the first fuse which are connected in series; the positive power supply of the storage battery is also connected to a third normally open contact of the wake-up relay and a second normally open contact of the power supply relay through a second fuse; grounding a first coil output end of a conversion relay, a second coil output end of a power supply relay and a third coil output end of a wake-up relay, directly connecting a third common end of the wake-up relay with a first common end of the conversion relay, respectively connecting a first normally closed contact of the conversion relay with a third fuse, and connecting a second common end of the power supply relay with a fourth fuse in parallel, wherein the third fuse and the fourth fuse are respectively connected with a charge terminal of a corresponding wake-up plug-in and a charging terminal of the power supply plug-in series; and simultaneously connecting a signal terminal of the power supply plug-in with the input end of a second coil of the power supply relay and the input end of a third coil of the wake-up relay.
The third fuse and the fourth fuse are branch circuits formed by at least two fuses and charging terminals in the corresponding wake-up plug-in or power plug-in connected in series.
Advantages and advantageous effects of the utility model
1. When the whole vehicle is charged, the mechanical switch is in a disconnected state, and the mechanical switch is a manual mechanical switch for operating the whole vehicle, so that unnecessary electric equipment of the whole vehicle can be closed along with the mechanical switch, the service life of the unnecessary electric equipment can be prolonged, the influence of charging faults on the unnecessary electric equipment can be avoided, and the charging safety of the whole vehicle is improved.
2. When the whole vehicle is charged, the mechanical switch is in a disconnected state, and the mechanical switch is a manual mechanical switch for the whole vehicle, so that the operation of a storage battery power supply of the whole vehicle can be disconnected when the mechanical switch is disconnected, and the phenomena of voltage reduction and difficult starting caused by the fact that the storage battery power supply is in a working state for a long time are prevented.
3. When the whole vehicle is charged, the mechanical switch is in a disconnected state, and the mechanical switch is a manual mechanical switch for the whole vehicle, so that the operation of a storage battery power supply of the whole vehicle can be disconnected when the mechanical switch is disconnected, the static current output by the storage battery can be reduced, and the electric energy is saved.
4. After the whole vehicle is charged, all electric equipment is in a power-off state, the storage battery does not output static current, the service environment of the storage battery is improved, the service life of the storage battery is prolonged, and the whole vehicle is ensured to be placed for a longer time in a static state under the condition of normal starting, and is particularly obvious in a low-temperature environment or in winter.
5. When the whole vehicle is charged, the mechanical switch is in a disconnected state, and a specially-assigned person is not required to close the mechanical switch in time after the charging is finished, so that the labor cost is saved.
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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a control circuit diagram of the mechanical switch of the present invention in a closed condition and no charge signal state;
FIG. 2 is a control circuit diagram of the mechanical switch of the present invention in a closed condition with a charging signal;
FIG. 3 is a control circuit diagram of the mechanical switch of the present invention in an open condition with a charge signal; reference numerals, a storage battery 1, a mechanical switch 2, a first fuse 3, a second fuse 3-1, a third fuse 3-2, a fourth fuse 3-3, a transfer relay 4, a first coil input end 4-1, a first coil output end 4-2, a first common end 4-3, a first normally closed contact 4-4, a first normally open contact 4-5, the power supply comprises a power supply relay 5, a second coil input end 5-1, a second coil output end 5-2, a second common end 5-3, a second normally closed contact 5-4, a second normally open contact 5-5, a wake-up relay 6, a third coil input end 6-1, a third coil output end 6-2, a third common end 6-3, a third normally open contact 6-4, a wake-up plug-in 7 and a power supply plug-in 8.
Detailed Description
The terms "first," "second," "third," and "fourth" in the description and claims of this specification and the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by way of the drawings are illustrative only and are not to be construed as limiting the utility model.
As shown in fig. 1, 2 and 3, a charge control circuit for a new energy electric bus and a new energy electric road vehicle comprises a storage battery 1, a mechanical switch 2, a first fuse 3, a second fuse 3-1, a third fuse 3-2, a fourth fuse 3-3, a transfer relay 4, a power relay 5, a wake-up relay 6, a wake-up plug-in 7 and a power plug-in 8, wherein a positive power supply of the storage battery 1 is respectively connected to a first coil input end 4-1 of the transfer relay 4 and a second normally closed contact 5-4 of the power relay 5 through the mechanical switch 2 and the first fuse 3 which are connected in series; the positive power supply of the storage battery 1 is also connected to a third normally open contact 6-4 of the awakening relay 6 and a second normally open contact 5-5 of the power supply relay 5 through a second fuse 3-1; grounding a first coil output end 4-2 of a conversion relay 4, a second coil output end 5-2 of a power supply relay 5 and a third coil output end 6-2 of a wake-up relay 6, directly connecting a third common end 6-3 of the wake-up relay 6 with the first common end 4-3 of the conversion relay 4, respectively connecting a first normally closed contact 4-4 of the conversion relay 4 with a third fuse 3-2 and a second common end 5-3 of the power supply relay 5 with a fourth fuse 3-3 in parallel, and connecting the third fuse 3-2 and the fourth fuse 3-3 with charging terminals of a corresponding wake-up plug-in 7 and a corresponding power supply plug-in 8 in series; while the signal terminals of the power plug-in 8 are connected to the second coil input 5-1 of the power relay 5 and the third coil input 6-1 of the wake-up relay 6.
The third fuse 3-2 and the fourth fuse 3-3 are branch circuits consisting of at least two fuses in series with corresponding charging terminals in the wake-up plug 7 or the power plug 8.
The storage battery 1 is an accessory of the whole vehicle, provides a low-voltage power supply for the whole vehicle and has the voltage of 24V;
the mechanical switch 2 is an accessory of the whole vehicle, is a manual operation mechanical switch of the whole vehicle and can disconnect a storage battery power supply and unnecessary electric equipment of the whole vehicle;
the first fuse 3 is an internal accessory of a normal power distribution box of the whole vehicle and is a fast-melting fuse;
the second fuse 3-1 is a low-voltage harness accessory of the whole vehicle and is a fast-melting fuse;
the third fuse 3-2 is a fast fuse, and different numbers of fuses can be connected in parallel according to the power supply requirements of different power supply devices, and the number of the third fuses in fig. 1, 2, and 3 is used as a reference;
the fourth fuse 3-3 is a fast fuse, and different numbers of fuses can be connected in parallel according to the power supply requirements of different power supply devices, and the number of the fourth fuses in fig. 1, 2, and 3 is used as a reference;
the conversion relay 4 is a 24V pentagonal relay, is an independent charging system, can be independently made into hardware, and can also be integrated in other power supply equipment;
the power supply relay 5 is a 24V pentagonal relay, is an independent charging system, can be independently made into hardware, and can also be integrated in other power supply equipment;
the awakening relay 6 is a 12V/24V four-corner relay, is an independent charging system, can be independently made into hardware, and can also be integrated in other power supply equipment;
the wake-up plug-in 7 is an independent charging system, can be made into hardware alone, and can also be integrated in other power supply devices, and meanwhile, the wake-up plug-in 7 in fig. 1, 2, and 3 can be replaced by a wake-up plug-in of a different structure according to different hardware structures matched with the wake-up plug-in;
the power supply plug-in 8 is an independent charging system, can be made into hardware alone, can also be integrated in other power supply devices, and can be selectively replaced by a power supply plug-in of different structures according to different hardware structures matched with the power supply plug-in 8, wherein the power supply plug-in 8 in fig. 1, 2 and 3 is used as a reference;
working principle of the utility model
As shown in fig. 1, when the mechanical switch 2 is in a closed state and there is no charging signal, the power supply of the storage battery 1 enters the first coil input end 4-1 (pin 85) of the transfer relay 4 and the second normally closed contact 5-4 (pin 87 a) of the power relay 5 through the first fuse 3, and since the first coil output end 4-2 (pin 86) of the transfer relay 4 is in a normally grounded state, the first common end 4-3 (pin 30) of the transfer relay 4 is connected with the first normally open contact 4-5 (pin 87), so that the transfer relay 4 is in a suction state, the plug-in unit 7 is waken up without power input, and the vehicle has no charging signal and cannot be charged; the power supply of the power supply relay 5 is in a normally closed state through a second normally closed contact 5-4 (pin 87 a) and a second public end 5-3 (pin 30), the power supply relay 5 is enabled to be in a normally closed state, the power supply plug-in unit 8 is provided with power supply input, normal power can be provided for charging equipment, and the instrument, the TBOX and the DC/DC are guaranteed to be in an awakening state, so that normal running of a vehicle is guaranteed.
As shown in fig. 2, when the mechanical switch 2 is in a closed state and has a charging signal, the power of the storage battery 1 enters the first coil input end 4-1 (pin 85) of the transfer relay 4 and the second normally closed contact 5-4 (pin 87 a) of the power relay 5 through the first fuse 3, and since the first coil output end 4-2 (pin 86) of the transfer relay 4 is in a normally grounded state, the first common end 4-3 (pin 30) of the transfer relay 4 is connected with the first normally open contact 4-5 (pin 87), so that the transfer relay 4 is in a suction state, the plug-in unit 7 is awakened to have no power input, and the vehicle has no charging signal and cannot be charged;
the positive power supply of the storage battery 1 also enters a third normally open contact 6-4(87 pin) of the awakening relay 6 and a second normally open contact 5-5(87 pin) of the power relay 5 through a second fuse 3-1, when the vehicle is charged, an A + signal of a charging gun enters a second coil input end 5-1(85 pin) of the power relay 5 and a third coil input end 6-1(85 pin) of the awakening relay 6 through a signal terminal (5 pin) of the power plug-in 8, as a second coil output end 5-2(86 pin) of the power relay 5 and a third coil output end 6-2(86 pin) of the awakening relay 6 are both in a normal grounding state, the power relay 5 and the awakening relay 6 are both in a suction state, the power relay 5 outputs the power supply of the storage battery 1 to the power plug-in 8 through a second common end 5-3(30 pin), the power supply plug-in 8 is connected with the vehicle charging equipment and provides power supply for the vehicle charging equipment; the awakening relay 6 transmits power to a first public end 4-3(30 pins) of the conversion relay 4 through a third public end 6-3(30 pins), because the mechanical switch 2 is closed, a first coil input end 4-1(85 pins) of the conversion relay 4 is electrified, the first public end 4-3(30 pins) is connected with a first normally open contact 4-5(87 pins), the conversion relay 4 is in an attraction state, the awakening plug-in unit 7 has no power input and can not provide a charging awakening signal for the charging equipment, the power and the awakening signal of the charging equipment can not be simultaneously met at the moment, the vehicle can not be charged, and the charging can be prevented when the mechanical switch is in the closed state.
As shown in fig. 3, when the mechanical switch 2 is in an off state, the power of the secondary battery 1 enters the third normally open contact 6-4 (pin 87) of the wake-up relay 6 and the second normally open contact 5-5 (pin 87) of the power relay 5 through the third fuse 3-2, when the vehicle is charged, the a + signal of the charging gun enters the second coil input terminal 5-1 (pin 85) of the power relay 5 and the third coil input terminal 6-1 (pin 85) of the wake-up relay 6 through the signal terminal (pin 5) of the power plug-in 8, since the second coil output terminal 5-2 (pin 86) of the power relay 5 and the third coil output terminal 6-2 (pin 86) of the wake-up relay 6 are both in a normally grounded state, the power relay 5 and the wake-up relay 6 are both in an attraction state, the power relay 5 outputs the power of the secondary battery 1 to the power plug-in 8 through the second common terminal 5-3 (pin 30), the power supply plug-in 8 is connected with the vehicle charging equipment and provides power supply for the vehicle charging equipment; the awakening relay 6 transmits power to a first public end 4-3(30 pin) of the conversion relay 4 through a third public end 6-3(30 pin), because the mechanical switch 2 is switched off, a first coil input end 4-1(85 pin) of the conversion relay 4 is not electrified, at the moment, the first public end 4-3(30 pin) is connected with a first normally closed contact 4-4(87a pin), the conversion relay 4 is in a normally closed state, the awakening plug-in unit 7 has power input, a charging awakening signal is provided for the charging equipment, at the moment, the power and the awakening signal of the charging equipment are both satisfied, and the vehicle starts to be charged.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (2)

1. A charging control circuit of a new energy electric bus and a new energy electric bus is characterized by comprising a storage battery (1), a mechanical switch (2), a first fuse (3), a second fuse (3-1), a third fuse (3-2), a fourth fuse (3-3), a transfer relay (4), a power supply relay (5), a wake-up relay (6), a wake-up plug-in (7) and a power supply plug-in (8), wherein a positive power supply of the storage battery (1) is respectively connected to a first coil input end (4-1) of the transfer relay (4) and a second normally closed contact (5-4) of the power supply relay (5) through the mechanical switch (2) and the first fuse (3) which are connected in series; the positive power supply of the storage battery (1) is also connected to a third normally open contact (6-4) of the awakening relay (6) and a second normally open contact (5-5) of the power supply relay (5) through a second fuse (3-1); a first coil output end (4-2) of the conversion relay (4), a second coil output end (5-2) of the power supply relay (5) and a third coil output end (6-2) of the awakening relay (6) are grounded, a third common end (6-3) of the awakening relay (6) is directly connected with the first common end (4-3) of the conversion relay (4), and the first normally closed contact (4-4) of the transfer relay (4) is connected with the third fuse (3-2) in parallel respectively, the second common end (5-3) of the power supply relay (5) is connected with the fourth fuse (3-3) in parallel respectively, the third fuse wire (3-2) and the fourth fuse wire (3-3) are connected in series with the charging terminals of the corresponding awakening plug-in unit (7) and the corresponding power plug-in unit (8); and simultaneously connecting the signal terminal of the power supply plug-in (8) with a second coil input end (5-1) of the power supply relay (5) and a third coil input end (6-1) of the wake-up relay (6).
2. The charging control circuit of the new energy electric bus and the new energy electric road vehicle according to claim 1, characterized in that the third fuse (3-2) and the fourth fuse (3-3) are branch circuits composed of at least two fuses connected in series with the charging terminals of the corresponding wake-up plug-in (7) or power plug-in (8).
CN202121842697.9U 2021-08-09 2021-08-09 Charging control circuit of new energy electric bus and new energy electric bus Active CN215705710U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121842697.9U CN215705710U (en) 2021-08-09 2021-08-09 Charging control circuit of new energy electric bus and new energy electric bus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121842697.9U CN215705710U (en) 2021-08-09 2021-08-09 Charging control circuit of new energy electric bus and new energy electric bus

Publications (1)

Publication Number Publication Date
CN215705710U true CN215705710U (en) 2022-02-01

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