CN214900270U - Protection device for power-off and reverse connection prevention circuit of electric vehicle charging seat - Google Patents

Protection device for power-off and reverse connection prevention circuit of electric vehicle charging seat Download PDF

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Publication number
CN214900270U
CN214900270U CN202121092481.5U CN202121092481U CN214900270U CN 214900270 U CN214900270 U CN 214900270U CN 202121092481 U CN202121092481 U CN 202121092481U CN 214900270 U CN214900270 U CN 214900270U
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charging seat
interface module
electric vehicle
resistor
charging
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杨涛
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Taizhou Kaitong New Energy Technology Co ltd
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Taizhou Kaitong New Energy Technology 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
    • Y02T90/14—Plug-in electric vehicles

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The application relates to a protection device for a power-off and reverse-connection prevention circuit of an electric vehicle charging seat, which comprises a charging seat interface module, a charging seat interface module and a reverse-connection prevention module, wherein the charging seat interface module comprises a charging seat anode and a charging seat cathode; one input end of the drive output module is connected with the charging seat anode of the charging seat interface module, and the other input end of the drive output module is connected with the charging seat cathode of the charging seat interface module; the input end of the whole vehicle battery power interface is connected with the output end of the driving output module, one output end of the whole vehicle battery power interface is used for being connected with the positive electrode of the battery of the electric vehicle, and the other output end of the whole vehicle battery power interface is used for being connected with the negative electrode of the battery of the electric vehicle; this application has and to realize preventing the protection of filling conversely, effectively prevents dangerous production, has improved the effect of the security when charging greatly.

Description

Protection device for power-off and reverse connection prevention circuit of electric vehicle charging seat
Technical Field
The application relates to the field of electric vehicle charging seats, in particular to a power-off and reverse-connection-prevention circuit protection device for an electric vehicle charging seat.
Background
At present, an electric vehicle is an electric drive vehicle, namely an electric drive vehicle. Generally, an electric vehicle is a vehicle that uses a battery as an energy source, and converts electric energy into mechanical energy through a controller, a motor and other components to move so as to control the current to change the speed.
When the electric vehicle is charged at present, the anode and the cathode of the battery of the electric vehicle are respectively connected with the electrodes corresponding to the charging seat of the electric vehicle, and after the charging seat of the electric vehicle is started, the charging seat of the electric vehicle outputs direct current voltage to the battery of the electric vehicle, so that the battery of the electric vehicle is charged.
In view of the above-mentioned related technologies, the inventor believes that there are dangerous situations that when the polarity of the charging voltage input from the charging-stand interface module is reversed, the battery of the electric vehicle cannot be normally charged, and even the charger and the battery of the electric vehicle are damaged, and a short circuit is caused.
SUMMERY OF THE UTILITY MODEL
In order to improve the charging safety problem of the electric vehicle in the charging process, the application provides an electric vehicle charging seat outage and reverse connection prevention circuit protection device.
The application provides a pair of electric motor car charging seat outage and prevent reverse-connection circuit protection device adopts following technical scheme:
the utility model provides an electric motor car charging seat outage and prevent reverse connection circuit protection device, includes:
the charging seat interface module comprises a charging seat anode and a charging seat cathode;
one input end of the drive output module is connected with the charging seat anode of the charging seat interface module, and the other input end of the drive output module is connected with the charging seat cathode of the charging seat interface module;
the input end of the whole vehicle battery power interface is connected with the output end of the driving output module, one output end of the whole vehicle battery power interface is used for being connected with the positive electrode of the battery of the electric vehicle, and the other output end of the whole vehicle battery power interface is used for being connected with the negative electrode of the battery of the electric vehicle;
and two input ends of the driving output module are used for receiving power supply signals output by the charging seat interface module, and the driving output module is used for controlling a power supply loop of a battery power interface of the whole vehicle to be switched on or switched off.
By adopting the technical scheme, when the polarity of the charging voltage input from the charging seat interface module is correct, the input end of the driving output module receives the correct polarity voltage, and then the charging loop between the power supply interface of the finished automobile battery and the charging seat interface module is switched on through the driving output module, so that the charging work can be smoothly carried out; when the polarity of the charging voltage input from the charging seat interface module is reversely connected, the drive output module is in a disconnected state, and at the moment, a charging loop between the charging seat interface module and a power supply interface of the whole vehicle battery can be cut off, so that the protection when abnormal charging occurs is realized, the reverse charging protection effect is realized, the danger can be effectively prevented, and the charging safety is greatly improved.
Preferably, the driving output module includes:
a trigger circuit unit with its input end connected to the two outputs of the charging seat interface module
The terminal is used for receiving a power supply signal input by the charging seat interface module, and the output terminal of the trigger circuit unit is used for outputting a trigger signal;
the input end of the electronic switch output module unit is connected with the output end of the trigger circuit unit and is used for receiving the trigger signal output by the trigger circuit unit; the output end of the electronic switch output module unit is connected with the input end of the finished automobile battery power interface and used for outputting a control signal to control the on-off of a power supply loop of the finished automobile battery power interface.
By adopting the technical scheme, when the polarity of the charging voltage received by the two input ends of the trigger circuit unit is correct, the output end of the trigger circuit unit outputs a trigger signal to the electronic switch output module unit, and after the input end of the electronic switch output module unit receives the trigger signal, the output end of the electronic switch output module unit outputs a control signal to realize the conduction of a charging loop between the charging seat interface module and the finished automobile battery power interface; when the polarity of the charging voltage received by the two input ends of the trigger circuit unit is reversely connected, the output end of the trigger circuit unit cannot output a trigger signal to the electronic switch output module unit, and the electronic switch output module unit is in a disconnected state, so that the electronic switch output module unit can always keep a power supply loop of a battery power interface of the whole vehicle in a disconnected state.
Preferably, the trigger circuit unit comprises a first resistor R1 and a second resistor R2 connected in series, and a PNP transistor Q1; the other end of the first resistor R1 is connected with the charging seat anode of the charging seat interface module, and the other end of the second resistor R2 is connected with the charging seat cathode of the charging seat interface module; the base electrode of the PNP transistor Q1 is connected between the first resistor R1 and the second resistor R2, the collector electrode of the PNP transistor Q1 is connected to one input end of the electronic switch output module unit, and the emitter electrode of the PNP transistor Q1 is connected to the positive electrode of the charging seat interface module.
By adopting the technical scheme, when the polarity of the charging voltage input by the charging seat interface module is correct, the voltage input by the anode of the charging seat is divided by the first resistor R1 and the second resistor R2 to input forward bias voltage to the base electrode of the PNP transistor Q1, the emitter electrode and the collector electrode of the PNP transistor Q1 are controlled by the forward bias voltage of the base electrode of the PNP transistor Q1 to be conducted, and at the moment, the output end of the trigger circuit unit can smoothly output a trigger signal; when the polarity of the charging voltage input from the charging seat interface module is reversely connected, the voltage input from the negative electrode of the charging seat interface module is divided by the first resistor R1 and the second resistor R2 to apply reverse bias voltage to the base electrode of the PNP transistor Q1, at the moment, the emitter and the collector of the PNP transistor Q1 are in a disconnected state, the input end of the electronic switch output module unit cannot receive the trigger signal and keeps in the disconnected state, at the moment, the power supply loop of the battery power interface of the whole vehicle always keeps in the disconnected state, and meanwhile, the battery power interface of the whole vehicle is ensured to be uncharged, so that the charging safety is further improved.
Preferably, the electronic switch output module unit comprises a one-way thyristor Q2, and a trigger electrode of the one-way thyristor Q2 is connected to a collector electrode of the PNP transistor Q1 and is configured to receive a trigger signal; the cathode of the one-way controllable silicon Q2 is connected to the charging seat cathode of the charging seat interface module, and the anode of the one-way controllable silicon Q2 is connected to the cathode input end of the whole vehicle battery power interface.
By adopting the technical scheme, the unidirectional silicon controlled rectifier Q2 has the advantages of small volume, light weight, high efficiency, long service life, rapid response, convenient control and the like, so that the reliability and the sensitivity during on-off control are ensured by adopting the unidirectional silicon controlled rectifier Q2 to control the on-off control of the electronic switch output module unit.
Preferably, the electronic switch output module unit further includes a zener diode D1, an anode of the zener diode D1 is connected to the trigger electrode of the thyristor Q2, and a cathode of the zener diode D1 is connected to the collector of the PNP transistor Q1.
By adopting the technical scheme, when the negative electrode of the voltage stabilizing diode D1 receives the trigger signal output by the trigger circuit unit, the voltage stabilizing diode D1 is broken down and conducted, and once the trigger electrode of the one-way controllable silicon Q2 is conducted once, the cathode and the anode of the one-way controllable silicon Q2 realize the conduction of the power supply loop of the battery power interface of the whole vehicle; the voltage stabilizing diode D1 can also stabilize the voltage of the circuit.
Preferably, the electronic switch output module further includes a third resistor R3 disposed between the collector of the PNP transistor Q1 and the cathode of the zener diode D1, one end of the third resistor R3 is connected to the collector of the PNP transistor Q1, and the other end of the third resistor R3 is connected to the cathode of the zener diode D1.
By adopting the technical scheme, the third resistor R3 can play a current-limiting protection effect on the voltage stabilizing diode D1, so that the condition that the voltage stabilizing diode D1 is damaged due to overlarge cable at the moment of conduction can be effectively prevented, and the voltage stabilizing diode D1 is protected.
Preferably, the electronic switch output module unit further includes an anti-interference capacitor C1, one end of the anti-interference capacitor C1 is connected to a connection point between the third resistor R3 and the negative electrode of the zener diode D1, and the other end of the anti-interference capacitor C1 is connected to the negative electrode of the charging dock interface module.
Through adopting above-mentioned technical scheme, anti-interference capacitor C1 can further ensure the stability of circuit for each electric element in the circuit can keep normal running state, and can also ensure the stable output of electric current.
Preferably, the anti-interference capacitor C1 is an anti-interference patch capacitor.
Through adopting above-mentioned technical scheme, anti-interference paster electric capacity has not fragile in the transit in comparison with ordinary plug-in components formula electric capacity, small in size, and the installation cost of plug-in components technology is low, consequently under same cost, anti-interference paster electric capacity's performance is more excellent.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when the polarity of the charging voltage input from the charging seat interface module is reversely connected, the charging loop can be disconnected by driving the output module, so that the reverse charging protection effect is realized, the danger can be effectively prevented, and the charging safety is greatly improved;
2. when the drive output module is in the off state, the charging loop of the charging seat interface module and the power supply interface of the whole vehicle battery can be always kept in the off state, so that the electrode of the charging seat interface module is not charged at ordinary times and is not charged with voltage, and the effect of safety protection without short circuit between the electrodes of the charging seat interface module is realized.
Drawings
Fig. 1 is a circuit diagram of an embodiment of the present application.
Fig. 2 is a block schematic diagram of the circuit diagram of fig. 1.
Description of reference numerals: 1. a charging seat interface module; 2. a drive output module; 21. a trigger circuit unit; 22. an electronic switch output module unit; 3. and a power supply interface of the battery of the whole vehicle.
Detailed Description
The present application is described in further detail below with reference to figures 1-2.
The embodiment of the application discloses outage of electric motor car charging seat and prevent reverse connection circuit protection device. Referring to fig. 1 and 2, the protection device for preventing the reverse charging circuit of the charging seat of the electric vehicle comprises a charging seat interface module 1, a driving output module 2 and a power supply interface 3 of a battery of the whole vehicle. When the polarity of the charging voltage input from the charging seat interface module 1 is correct, the charging loop between the entire vehicle battery power interface 3 and the charging seat interface module 1 is switched on through the driving output module 2. When the polarity of the charging voltage input from the charging seat interface module 1 is reversely connected, the driving output module 2 is in a disconnected state, at the moment, a charging loop between the whole vehicle battery power interface 3 and the charging seat interface module 1 is also in a cut-off state, and the protection when abnormal charging occurs is realized through the control of the driving output module 2, so that the function of reverse charging protection is realized.
As shown in fig. 1 and fig. 2, the charging-stand interface module 1 includes a charging-stand anode and a charging-stand cathode, and an output end of the charging-stand interface module 1 is used for outputting a dc power supply signal required for charging the battery of the electric vehicle. The driving output module 2 includes a trigger circuit unit 21 and an electronic switch output module unit 22, wherein the trigger circuit unit 21 includes a first resistor R1 and a second resistor R2 connected in series, and a PNP transistor Q1. The other end of the first resistor R1 is connected to the charging dock anode of the charging dock interface module 1, and the other end of the second resistor R2 is connected to the charging dock cathode of the charging dock interface module 1.
As shown in fig. 1 and fig. 2, the base of the PNP transistor Q1 is connected to the connection point between the first resistor R1 and the second resistor R2, and is used for receiving the power supply signal input by the cradle interface module 1. The emitter of the PNP transistor Q1 is connected to the connection point between the first resistor R1 and the positive output terminal of the cradle interface module 1. The collector of PNP transistor Q1 is connected to an input of electronic switch output block 22 and is used to output a trigger signal to switch output block 22.
As shown in fig. 1 and fig. 2, the electronic switch output module unit 22 includes a one-way thyristor Q2, a zener diode D1, an anti-interference capacitor C1, and a third resistor R3. One end of the third resistor R3 is connected to the collector of the PNP transistor Q1, the other end of the third resistor R3 is connected to the anti-interference capacitor C1, the other end of the anti-interference capacitor C1 is connected to the negative electrode of the charging dock interface module 1, and the anti-interference capacitor C1 is an anti-interference chip capacitor in this embodiment. The cathode of the zener diode D1 is connected to the connection point between the third resistor R3 and the anti-interference capacitor C1 and is used for receiving the trigger signal, and the anode of the zener diode D1 is connected to the trigger electrode of the one-way thyristor Q2. The cathode of the one-way controllable silicon Q2 is connected with the connection point between the charging seat cathode of the charging seat interface module 1 and the grounding end, and the anode of the one-way controllable silicon Q2 is connected with the whole vehicle battery power interface 3. One input end of the whole vehicle battery power interface 3 is connected to the charging seat anode of the charging seat interface module 1, and the corresponding output end is used for connecting the anode of the electric vehicle battery. The other input end of the whole vehicle battery power interface 3 is connected with the anode of the one-way thyristor Q2, and the corresponding output end is used for being connected with the cathode of the electric vehicle battery.
The implementation principle of the power-off and reverse-connection-prevention circuit protection device of the electric vehicle charging seat in the embodiment of the application is as follows: when the polarity of the charging voltage input from the charging-stand interface module 1 is correct, the trigger circuit unit 21 outputs a trigger signal to the electronic switch output module unit 22, and when the switch output module unit 22 receives the trigger signal, the one-way thyristor Q2 is turned on, and at this time, the power supply loop between the charging-stand interface module 1 and the vehicle battery power interface 3 is turned on. When the polarity of the charging voltage input from the charging seat interface module 1 is reversely connected, the voltage input from the negative output end of the charging seat interface module 1 is divided by the first resistor R1 and the second resistor R2 to apply a reverse bias voltage to the base of the PNP transistor Q1, at this time, the emitter and the collector of the PNP transistor Q1 are in a disconnected state, the input end of the electronic switch output module unit 22 cannot receive a trigger signal and keeps the disconnected state, at this time, the power supply loop of the entire vehicle battery power interface 3 always keeps the disconnected state, and meanwhile, the entire vehicle battery power interface 3 is ensured to be uncharged, so that the charging safety is further improved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides an electric motor car charging seat outage and prevent reverse connection circuit protection device which characterized in that includes:
the charging seat interface module (1) comprises a charging seat anode and a charging seat cathode;
one input end of the driving output module (2) is connected to the charging seat anode of the charging seat interface module (1), and the other input end of the driving output module (2) is connected to the charging seat cathode of the charging seat interface module (1);
the input end of the whole vehicle battery power interface (3) is connected with the output end of the driving output module (2), one output end of the whole vehicle battery power interface (3) is used for being connected with the positive electrode of a battery of the electric vehicle, and the other output end of the whole vehicle battery power interface (3) is used for being connected with the negative electrode of the battery of the electric vehicle;
two input ends of the driving output module (2) are used for receiving power supply signals output by the charging seat interface module (1), and the driving output module (2) is used for controlling a power supply loop of the whole vehicle battery power interface (3) to be switched on or switched off.
2. The protection device for power-off and reverse-connection prevention circuit of electric vehicle charging seat according to claim 1, wherein the driving output module (2) comprises:
a trigger circuit unit (21) whose input end is connected to the charging seat interface module (1)
The two output ends of the charging seat interface module (1) are used for receiving a power supply signal input by the charging seat interface module, and the output end of the trigger circuit unit (21) is used for outputting a trigger signal;
the input end of the electronic switch output module unit (22) is connected to the output end of the trigger circuit unit (21) and is used for receiving the trigger signal output by the trigger circuit unit (21); the output end of the electronic switch output module unit (22) is connected to the input end of the finished automobile battery power interface (3) and used for outputting a control signal to control the on-off of a power supply loop of the finished automobile battery power interface (3).
3. The protection device for the power-off and reverse-connection-prevention circuit of the electric vehicle charging seat according to claim 2, is characterized in that: the trigger circuit unit (21) comprises a first resistor R1 and a second resistor R2 which are connected in series, and a PNP type transistor Q1; the other end of the first resistor R1 is connected with the charging seat anode of the charging seat interface module (1), and the other end of the second resistor R2 is connected with the charging seat cathode of the charging seat interface module (1); the base electrode of the PNP type transistor Q1 is connected between the first resistor R1 and the second resistor R2, the collector electrode of the PNP type transistor Q1 is connected with one input end of the electronic switch output module unit (22), and the emitter electrode of the PNP type transistor Q1 is connected with the positive electrode of the charging seat interface module (1).
4. The protection device for the power-off and reverse-connection-prevention circuit of the electric vehicle charging seat according to claim 3, is characterized in that: the electronic switch output module unit (22) comprises a unidirectional silicon controlled rectifier Q2, and a trigger electrode of the unidirectional silicon controlled rectifier Q2 is connected to a collector electrode of a PNP type transistor Q1 and used for receiving a trigger signal; the cathode of the one-way controllable silicon Q2 is connected to the charging seat cathode of the charging seat interface module (1), and the anode of the one-way controllable silicon Q2 is connected to the cathode input end of the whole vehicle battery power interface (3).
5. The protection device for the power-off and reverse-connection-prevention circuit of the electric vehicle charging seat according to claim 4, is characterized in that: the electronic switch output module unit (22) further comprises a voltage stabilizing diode D1, the anode of the voltage stabilizing diode D1 is connected to the trigger electrode of the controllable silicon Q2, and the cathode of the voltage stabilizing diode D1 is connected to the collector electrode of the PNP type transistor Q1.
6. The protection device for the power-off and reverse-connection-prevention circuit of the electric vehicle charging seat according to claim 5, is characterized in that: the electronic switch output module unit (22) further comprises a third resistor R3 arranged between the collector of the PNP transistor Q1 and the cathode of the voltage stabilizing diode D1, one end of the third resistor R3 is connected with the collector of the PNP transistor Q1, and the other end of the third resistor R3 is connected with the cathode of the voltage stabilizing diode D1.
7. The protection device for the power-off and reverse-connection-prevention circuit of the electric vehicle charging seat according to claim 6, is characterized in that: the electronic switch output module unit (22) further comprises an anti-interference capacitor C1, one end of the anti-interference capacitor C1 is connected to a connection point between the third resistor R3 and the negative electrode of the voltage stabilizing diode D1, and the other end of the anti-interference capacitor C1 is connected to the negative electrode of the charging base interface module (1).
8. The protection device for the power-off and reverse-connection-prevention circuit of the electric vehicle charging seat according to claim 7, is characterized in that: the anti-interference capacitor C1 adopts an anti-interference patch capacitor.
CN202121092481.5U 2021-05-20 2021-05-20 Protection device for power-off and reverse connection prevention circuit of electric vehicle charging seat Active CN214900270U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121092481.5U CN214900270U (en) 2021-05-20 2021-05-20 Protection device for power-off and reverse connection prevention circuit of electric vehicle charging seat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121092481.5U CN214900270U (en) 2021-05-20 2021-05-20 Protection device for power-off and reverse connection prevention circuit of electric vehicle charging seat

Publications (1)

Publication Number Publication Date
CN214900270U true CN214900270U (en) 2021-11-26

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Application Number Title Priority Date Filing Date
CN202121092481.5U Active CN214900270U (en) 2021-05-20 2021-05-20 Protection device for power-off and reverse connection prevention circuit of electric vehicle charging seat

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