CN111284340A - Charging device for electric vehicle - Google Patents
Charging device for electric vehicle Download PDFInfo
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- CN111284340A CN111284340A CN201910975015.2A CN201910975015A CN111284340A CN 111284340 A CN111284340 A CN 111284340A CN 201910975015 A CN201910975015 A CN 201910975015A CN 111284340 A CN111284340 A CN 111284340A
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- Prior art keywords
- control unit
- connection confirmation
- electric vehicle
- temperature
- charging
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/66—Data transfer between charging stations and vehicles
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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
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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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- 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
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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
- 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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- 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
Abstract
The utility model provides a battery charging outfit of electric motor car, contains power plug, the rifle that charges, control box, temperature detection circuit and temperature protection circuit. The charging gun is detachably connected to the electric vehicle and includes a connection confirmation terminal and a connection confirmation circuit. The connection confirmation circuit is used for outputting a connection confirmation signal to the connection confirmation terminal. The connection confirmation signal includes at least a first voltage level and a second voltage level. The control box comprises a second control unit. The temperature detection circuit detects the temperature of the power plug or the control box and outputs a corresponding temperature signal to the second control unit when the detected temperature exceeds a preset temperature level. The temperature protection circuit is electrically connected between the second control unit and the connection confirmation terminal. The temperature protection circuit adjusts the voltage level at the connection confirmation terminal when the second control unit receives the corresponding temperature signal.
Description
Technical Field
The present disclosure relates to a charging device for an electric vehicle, and more particularly, to a charging device for an electric vehicle having an over-temperature protection function.
Background
With the recent increase of environmental awareness, how to develop an electrically driven vehicle to replace the conventional transportation vehicle driven by fossil fuel has become an important target of the automobile industry.
Further, in order to conveniently supply electric power required for electric vehicles, electric vehicle charging apparatuses applicable to homes or places of work using commercial ac power sources have been developed. In the case of a household charging device, when a battery of an electric vehicle needs to be charged through a power outlet of a commercial ac power source, the electric vehicle must be connected to the commercial ac power source through a charging device. The charging device includes a power plug electrically connectable to a power outlet of a commercial alternating-current power source, and a charging gun electrically connected to a car-end socket of the electric vehicle. When the battery of the electric vehicle is charged, the power plug of the charging device is plugged into a power outlet in the home.
However, in order to shorten the charging time, the electric vehicle often needs to receive a large current through the charging device for charging, and such long charging will cause the temperature of the charging device to gradually rise. Moreover, if the power plug is not connected to the power socket of the commercial ac power source, abnormal heat generation may occur, which may result in leakage of electricity. Due to the above two problems, the temperature of the charging device is often too high, and the high temperature will cause the charging device to be easily damaged or even burned.
Therefore, how to provide a charging device for an electric vehicle with an over-temperature protection function is a problem which needs to be solved urgently in the field.
Disclosure of Invention
The present disclosure provides a charging device for an electric vehicle, which has an over-temperature protection function, and can notify an abnormal temperature of the electric vehicle when a power plug or a control box of the charging device has an excessively high temperature, and stop or reduce a charging current, so as to prevent a component or a circuit from being damaged due to a continuous temperature rise. Furthermore, the signal transmission of the over-temperature protection function does not affect the detection and judgment of the charging information of the electric vehicle, and additional wiring is not needed.
To achieve the foregoing objective, the present disclosure provides a charging device for an electric vehicle, configured to charge the electric vehicle. The electric vehicle includes a first control unit. The charging equipment comprises a power plug, a charging gun, a control box, a temperature detection circuit and a temperature protection circuit. The power plug receives alternating current of a commercial alternating current power supply. The charging gun is connected with the power plug through a charging wire, is detachably connected with the electric vehicle, and comprises a connection confirmation terminal and a connection confirmation circuit. The connection confirmation circuit is used for outputting a connection confirmation signal to the connection confirmation terminal, wherein the connection confirmation signal has a first voltage level when the charging gun and the electric vehicle are in a normal connection state, and the connection confirmation signal has a second voltage level when the charging gun and the electric vehicle are in an abnormal connection state. The control box is connected between the power plug and the charging gun, is configured to selectively transmit the alternating current received by the power plug to the charging gun, and comprises a second control unit. The temperature detection circuit is electrically connected with the second control unit and used for detecting the temperature of the power plug or the control box and outputting a corresponding temperature signal when the temperature of the power plug or the control box exceeds a preset temperature level. The temperature protection circuit is electrically connected between the second control unit and the connection confirmation terminal, and the second control unit drives the temperature protection circuit to adjust the voltage level on the connection confirmation terminal according to the corresponding temperature signal.
To achieve the foregoing objective, the present disclosure further provides a charging device for an electric vehicle, configured to charge the electric vehicle. The electric vehicle comprises a first control unit and a first wireless transmission module, and the first control unit is connected with the first wireless transmission module. The charging equipment comprises a power plug, a charging gun, a control box, a temperature detection circuit and a temperature protection circuit. The power plug receives alternating current of a commercial alternating current power supply. The rifle that charges passes through the charging wire and is connected with power plug, and detachably is connected with the electric motor car. The control box is connected between the power plug and the charging gun, is configured to selectively transmit the alternating current received by the power plug to the charging gun, and comprises a second control unit. The temperature detection circuit is electrically connected with the second control unit and used for detecting the temperature of the power plug or the control box and outputting a corresponding temperature signal when the temperature of the power plug or the control box exceeds a preset temperature level. The temperature protection circuit is electrically connected to the second control unit, the temperature protection circuit comprises a second wireless transmission module, when the second control unit receives a corresponding temperature signal, the second control unit drives the second wireless transmission module of the temperature protection circuit to output a wireless signal to the first wireless transmission module of the electric vehicle, and when the first control unit of the electric vehicle receives the wireless signal through the first wireless transmission module, a protection mechanism is executed.
Drawings
Fig. 1 is a schematic circuit architecture diagram of a charging device of an electric vehicle disclosing a first embodiment of the present disclosure.
Fig. 2 is a schematic diagram disclosing a detailed circuit architecture of the temperature protection circuit shown in fig. 1.
Fig. 3 is a schematic circuit architecture diagram of a charging device of an electric vehicle disclosing a second embodiment of the present disclosure.
Description of reference numerals:
1. 1': charging device
2: power supply plug
3: temperature detection circuit
4. 4': control box
40: second control unit
41. 41': temperature protection circuit
410: switching circuit
410': second wireless transmission module
5: charging wire
6: charging gun
60: connection confirmation circuit
9: electric vehicle
90: vehicle-mounted charging unit
91: a first control unit
92: first wireless transmission module
B: PNP type transistor
CC: connection confirmation terminal
And (3) CP: control guide terminal
D: diode with a high-voltage source
G: grounding terminal
K1: first relay
K2: second relay
L: live wire
L1, N1: charging terminal
N: center line
PE: protective earth wire
PE 1: grounding terminal
R1: first resistance unit
R2: second resistance unit
R3: third resistance unit
R4: fourth resistance unit
S1: switch unit
Vcc: connection confirmation signal
Vcp: controlling pilot signals
Vs: voltage source
Detailed Description
Some exemplary embodiments that incorporate the features and advantages of the present disclosure will be described in detail in the specification which follows. It is to be understood that the disclosure is capable of various modifications in various embodiments without departing from the scope of the disclosure, and that the description and drawings are to be regarded as illustrative in nature, and not as restrictive.
In this disclosure, the term "coupled" may be referred to as "electrically coupled," and the term "connected" may also be referred to as "electrically connected. The terms "coupled" and "connected" may be used to indicate that two or more elements co-operate or interact with each other. It is to be understood that although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of embodiments.
Fig. 1 is a schematic circuit architecture diagram of a charging device of an electric vehicle disclosing a first embodiment of the present disclosure. Fig. 2 is a schematic diagram disclosing a detailed circuit architecture of the temperature protection circuit shown in fig. 1. As shown in fig. 1 and 2, the charging device 1 of the present embodiment conforms to the standard specification of european regulations, united states of america regulations and/or international regulations. The charging apparatus 1 is detachably connected between a power outlet (not shown) of a commercial ac power supply at home and an electric vehicle 9, wherein the electric vehicle 9 includes an in-vehicle charging unit 90 and a first control unit 91. The onboard charging unit 90 may include, for example, but not limited to, a battery and a charger to charge the battery. The first control unit 91 is configured to control the charging operation of the electric vehicle 9. The charging device 1 is configured to receive ac power from a power socket of a commercial ac power source and charge an electric vehicle 9, and includes a power plug 2, a control box 4, a charging wire 5, and a charging gun 6. Wherein the power plug 2 is detachably inserted into a power outlet of a commercial alternating current power source to receive alternating current of the commercial alternating current power source. The control box 4 is connected between the power plug 2 and the charging wire 5, and configured to selectively transmit the ac power received by the power plug 2 to the charging wire 5, the control box 4 can notify the first control unit 91 of the current power supply capability of the charging device 1, so that the first control unit 91 controls the maximum allowable input current of the vehicle-mounted charging unit 90, furthermore, the control box 4 includes a second control unit 40, the second control unit 40 is configured to control the operation of the control box 4, and the second control unit 40 and the first control unit 91 of the electric vehicle 9 can communicate with each other through the charging wire 5 and the charging gun 6.
In the present embodiment, the charging cable 5 is connected between the control box 4 and the charging gun 6, and includes a live line L, a neutral line N and a protection ground line PE. The live line L, the neutral line N and the protection earth line PE respectively include a first end and a second end, wherein the first ends of the live line L, the neutral line N and the protection earth line PE are respectively connected to the power plug 2 through the control box 4, and the second ends of the live line L, the neutral line N and the protection earth line PE are respectively connected to the charging gun 6.
In the present embodiment, the charging gun 6 is connected to the power plug 2 through the control box 4 and the charging wire 5, and configured to transmit the ac power of the commercial ac power source to the electric vehicle 9 through the power plug 2, the control box 4 and the charging wire 5. Therefore, when the charging gun 6 is connected to the electric vehicle 9, the charging gun 6 can charge the electric vehicle 9. The charging gun 6 includes a plurality of terminals corresponding to sockets (not shown) of the electric vehicle 9 so that the charging gun 6 and the electric vehicle 9 can be electrically coupled to each other. For example, in the embodiment shown in fig. 1, the charging gun 6 includes a plurality of charging terminals L1, N1, a ground terminal PE1, a control pilot terminal CP and a connection confirmation terminal CC.
When the charging gun 6 is connected to the electric vehicle 9, the charging terminals L1 and N1 are electrically coupled to the vehicle-mounted charging unit 90 of the electric vehicle 9 via corresponding terminals on the socket of the electric vehicle 9, thereby charging the electric vehicle 9. In addition, the ground terminal PE1 may be electrically coupled to a first ground (not shown) in the charging apparatus 1 and/or a second ground G of the electric vehicle 9.
The connection confirmation terminal CC of the charging gun 6 is configured to be electrically coupled to the electric vehicle 9, and is used for the first control unit 91 of the electric vehicle 9 to sense whether the connection between the charging gun 6 and the electric vehicle 9 is a normal connection state (i.e. the charging gun 6 is connected to the socket of the electric vehicle 9 and correctly connected thereto) or an abnormal connection state (i.e. the charging gun 6 is pulled out and is separated from the socket of the electric vehicle 9 or is not correctly connected to the socket of the electric vehicle 9), so as to immediately stop charging or close the conductive path when necessary, thereby avoiding accidents.
The control leading terminal CP is connected to the second control unit 40 of the control box 4 and the first control unit 91 of the electric vehicle 9, and the control leading terminal CP is used for transmitting the control leading signal Vcp between the charging gun 6 and the electric vehicle 9, so that the second control unit 40 of the control box 4 and the first control unit 91 of the electric vehicle 9 can detect charging information, such as whether charging preparation is completed, the current suppliable current amount of the charging apparatus 1 and whether the charging procedure is completed, according to the voltage level and the duty ratio of the control leading signal Vcp. Since the operation principle of the control pilot terminal CP and the control pilot signal Vcp is well known to those skilled in the art, it is not described herein in detail.
In the present embodiment, the charging gun 6 further includes a connection confirmation circuit 60, wherein the connection confirmation circuit 60 is electrically coupled between the connection confirmation terminal CC and the ground terminal PE1 and is configured to output a connection confirmation signal Vcc to the first control unit 91 of the electric vehicle 9, thereby confirming the connection state between the charging gun 6 and the electric vehicle 9. The connection verification circuit 60 includes a plurality of resistor units including, for example, a first resistor unit R1 and a second resistor unit R2, and a switch unit S1. The first resistor unit R1 is electrically coupled in parallel with the switch unit S1 and is electrically coupled in series with the second resistor unit R2. The switch unit S1 may be a normally closed switch, i.e. normally turned on to bypass the first resistor unit R1, so that the voltage level of the connection confirmation signal Vcc may maintain the first voltage level. When the first control unit 91 of the electric vehicle 9 receives the connection confirmation signal Vcc having the first voltage level from the connection confirmation terminal CC, the first control unit 91 of the electric vehicle 9 performs a corresponding control process sequence. When the charging gun 6 is about to be detached from the socket of the electric vehicle 9, or the charging gun 6 is not correctly connected to the socket of the electric vehicle 9, i.e. in an abnormal connection state, the switch unit S1 is correspondingly turned off, so that the overall resistance of the connection confirmation circuit 60 is changed, and the voltage level of the connection confirmation signal Vcc is changed to a second voltage level, wherein the switch unit S1 may be turned off, for example, according to the detachment of the mechanism fixing member. Therefore, the first control unit 91 of the electric vehicle 9 may perform a protection mechanism upon receiving the connection confirmation signal Vcc having the second voltage level. In the present embodiment, the protection mechanism may, for example but not limited to, notify the control box 4 to stop transmitting ac power and/or reduce the current demand of the electric vehicle 9, so as to cause the control box 4 to de-rate the ac power received by the power plug 2 and output the de-rated ac power, thereby ensuring the safety of the user.
In the embodiment, the charging device 1 further includes a temperature detection circuit 3 and a temperature protection circuit 41, and the temperature protection circuit 41 may be disposed in the control box 4 or the charging gun 6, and is illustrated as being disposed in the control box 4 only as an example. The temperature detection circuit 3 may be disposed in the power plug 2 as shown in fig. 1, or disposed in the control box 4 (not shown). The temperature detection circuit 3 is connected to the second control unit 40 and is used for detecting the temperature of the power plug 2 or the control box 4 when the charging device 1 charges the electric vehicle 9. When the temperature of the power plug 2 or the control box 4 exceeds a predetermined temperature level, the temperature detection circuit 3 correspondingly outputs a corresponding temperature signal to the second control unit 40.
The temperature protection circuit 41 is connected between the second control unit 40 of the control box 4 and the connection confirmation terminal CC, and includes a switch circuit 410. The switch circuit 410 is connected to the voltage source Vs, the second control unit 40, and the connection confirmation terminal CC. The voltage level of the voltage source Vs may be a third voltage level equal to or similar to the second voltage level of the connection confirmation signal Vcc, and is mainly different from the first voltage level. The switch circuit 410 is controlled by the second control unit 40 to turn on or off a path between the voltage source Vs and the connection confirmation terminal CC. If the temperature detecting circuit 3 does not detect the over-temperature, i.e. the over-temperature signal is not outputted or the temperature signal outputted to the second control unit 40 does not exceed the predetermined value, the second control unit 40 controls the switch circuit 410 to switch off the path between the voltage source Vs and the connection confirmation terminal CC, so that the voltage of the voltage source Vs cannot be transmitted to the connection confirmation terminal CC, and at this time, the confirmation terminal CC is used to determine whether the connection between the charging gun 6 and the electric vehicle 9 is normal according to the original setting. If the temperature of the power plug 2 or the control box 4 exceeds the predetermined temperature level, the second control unit 40 controls the switch circuit 410 to open the path between the voltage source Vs and the connection confirmation terminal CC, so that the voltage different from the first voltage level provided by the voltage source Vs is transmitted to the connection confirmation terminal CC, and at this time, the first control unit 91 of the electric vehicle 9 regards the voltage different from the first voltage level provided by the voltage source Vs as the connection confirmation signal Vcc and executes the protection mechanism. For example, if the voltage level of the voltage source Vs is equal to the second voltage level of the connection confirmation signal Vcc, the first control unit 91 may determine that the connection between the charging gun 6 and the electric vehicle 9 is abnormal, and then execute a corresponding protection procedure, so as to achieve the purpose of over-temperature protection; or the voltage level of the voltage source Vs may be any third voltage level to notify the first control unit 91 that the current state is abnormal, so as to execute the corresponding protection procedure.
As can be seen from the above description, the charging device 1 includes the temperature detection circuit 3 and the temperature protection circuit 41, and the temperature protection circuit 41 transmits the voltage different from the first voltage level provided by the voltage source Vs to the first control unit 91 of the electric vehicle 9 through the connection confirmation terminal CC, so that the first control unit 91 can execute the corresponding protection mechanism when the temperature detection circuit 3 detects that the temperature of the power plug 2 or the control box 4 exceeds the predetermined temperature level, thereby preventing the elements or circuits of the charging device 1 from being burned at high temperature and ensuring the safety of the user. Furthermore, since the output of the temperature protection circuit 41 is transmitted to the electric vehicle 9 only through the connection confirmation terminal CC, the output of the temperature protection circuit 41 does not affect the control pilot signal Vcp of the control pilot terminal CP, so that the control pilot signal Vcp of the control pilot terminal CP can still be accurately transmitted to the first control unit 91 of the electric vehicle 9 by the charging device 1 without being interfered by the temperature protection circuit 41 and the like.
In some embodiments, the control box 4 further comprises a plurality of relays, such as a first relay K1 and a second relay K2. The first relay K1 is connected between the power plug 2 and the live line L, and the second relay K2 is connected between the power plug 2 and the neutral line N. The first relay K1 and the second relay K2 may be controlled by the second control unit 40 of the control box 4. When the charging apparatus 1 charges the electric vehicle 9, the first relay K1 and the second relay K2 are controlled by the second control unit 40 of the control box 4 to be turned on. However, when the first control unit 91 of the electric vehicle 9 notifies the control box 4 to stop transmitting the alternating current to the electric vehicle 9, the first relay K1 and the second relay K2 are controlled to be turned off by the second control unit 40 of the control box 4.
In some embodiments, as shown in fig. 2, the switch circuit 410 includes a third resistor unit R3, a fourth resistor unit R4, a diode D, and a PNP transistor B. One terminal of the third resistor unit R3 is connected to the voltage source Vs and the emitter of the PNP transistor B, and the other terminal of the third resistor unit R3 is connected to one terminal of the fourth resistor unit R4 and the base of the PNP transistor B. The other end of the fourth resistance unit R4 is connected to the second control unit 40. The collector of the PNP transistor B is connected to the anode of the diode D. The cathode of the diode D is connected to the connection confirmation terminal CC. However, the circuit configuration of the switch circuit 410 is not limited to the above, as long as the circuit can adjust the voltage level at the connection confirmation terminal CC. In some embodiments, the switch circuit 410 of the temperature protection circuit 41 may include a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) or an Insulated Gate Bipolar Transistor (IGBT) instead of the PNP Transistor B, and thus has different implementations.
Fig. 3 discloses a schematic circuit architecture diagram of a charging device of an electric vehicle according to a second embodiment of the disclosure. As shown in fig. 3, the charging device 1 'is detachably connected between a power socket (not shown) of a commercial ac power source in a home and the electric vehicle 9, and includes a power plug 2, a temperature detection circuit 3, a control box 4', a charging line 5 and a charging gun 6, wherein the power plug 2, the temperature detection circuit 3, the charging line 5, the second control unit 40 of the control box 4 'and the charging gun 6 shown in fig. 3 are similar to the power plug 2, the temperature detection circuit 3, the charging line 5, the second control unit 40 of the control box 4' and the charging gun 6 shown in fig. 1, and therefore, the description thereof is omitted. Compared to the first embodiment shown in fig. 1, the temperature protection circuit 41 ' of the control box 4 ' shown in fig. 3 includes a second wireless transmission module 410 '. Such as but not limited to a bluetooth transmission module, which is connected with the second control unit 40 of the control box 4'. In addition, the electric vehicle 9 further includes a first wireless transmission module 92. Such as, but not limited to, a bluetooth transmission module, which is connected with the first control unit 91 of the electric vehicle 9. In the embodiment, the second wireless transmission module 410' and the first wireless transmission module 92 can communicate with each other wirelessly.
When the temperature detecting circuit 3 detects that the temperature of the power plug 2 or the control box 4 'exceeds the predetermined temperature level and correspondingly outputs a corresponding temperature signal to the second control unit 40, the second control unit 40 drives the second wireless transmission module 410' to output a wireless signal to the first wireless transmission module 92. Then, the first control unit 91 of the electric vehicle 9 receives the wireless signal through the first wireless transmission module 92, and then performs a protection mechanism. In the present embodiment, the protection mechanism may, for example, but not limited to, notify the control box 4 'to stop transmitting ac power and/or reduce the current demand of the electric vehicle 9, so as to cause the control box 4' to de-rate the ac power received by the power plug 2 and output the de-rated ac power, so as to ensure the safety of use.
As can be seen from the above, since the charging device 1 'includes the temperature detection circuit 3 and the temperature protection circuit 41', and the second control unit 40 of the control box 4 'and the first control unit 91 of the electric vehicle 9 can wirelessly communicate with each other through the second wireless transmission module 410' and the first wireless transmission module 92 when the temperature detection circuit 3 detects that the temperature of the power plug 2 or the control box 4 'exceeds the predetermined temperature level, the present disclosure can prevent the elements or circuits of the charging device 1' from being burned at a high temperature and ensure safety in use. Moreover, when the charging cable 5 is damaged by the structural rolling of the electric vehicle 9, the over-temperature protection function of the charging device 1 ' cannot be easily disabled because the second control unit 40 of the control box 4 ' and the first control unit 91 of the electric vehicle 9 can still communicate with each other wirelessly through the second wireless transmission module 410 ' and the first wireless transmission module 92.
Various modifications and adaptations may occur to those skilled in the art to the present disclosure without departing from the scope of the appended claims.
Claims (10)
1. A charging device is configured to charge an electric vehicle, the electric vehicle includes a first control unit, the charging device includes:
a power plug for receiving AC power of a commercial AC power supply;
a charging gun connected with the power plug through a charging wire and detachably connected with the electric vehicle, and comprising a connection confirmation terminal and a connection confirmation circuit, wherein the connection confirmation circuit is used for outputting a connection confirmation signal to the connection confirmation terminal, the connection confirmation signal has a first voltage level when the charging gun and the electric vehicle are in a normal connection state, and the connection confirmation signal has a second voltage level when the charging gun and the electric vehicle are in an abnormal connection state;
the control box is connected between the power plug and the charging gun, is configured to selectively transmit the alternating current received by the power plug to the charging gun, and comprises a second control unit;
the temperature detection circuit is electrically connected with the second control unit and used for detecting the temperature of the power plug or the control box and outputting a corresponding temperature signal when the temperature of the power plug or the control box exceeds a preset temperature level; and
and the temperature protection circuit is electrically connected between the second control unit and the connection confirmation terminal, wherein the second control unit drives the temperature protection circuit to adjust the voltage level on the connection confirmation terminal according to the corresponding temperature signal.
2. The charging device of claim 1, wherein the temperature protection circuit comprises a switching circuit, the switching circuit is connected to a voltage source, the second control unit is connected to the connection confirmation terminal, and the switching circuit selectively connects the voltage source to the connection confirmation terminal according to the corresponding temperature signal.
3. The charging device as claimed in claim 2, wherein the switch circuit comprises a third resistor unit, a fourth resistor unit, a diode and a PNP transistor, one end of the third resistor unit is connected to the voltage source and the emitter of the PNP transistor, the other end of the third resistor unit is connected to one end of the fourth resistor unit and the base of the PNP transistor, the other end of the fourth resistor unit is connected to the second control unit, the collector of the PNP transistor is connected to the anode of the diode, and the cathode of the diode is connected to the charging gun.
4. The charging apparatus of claim 1, wherein the connection confirmation circuit comprises a first resistance unit, a second resistance unit, and a switch unit, the switch unit is connected in parallel with the first resistance unit, the switch unit and the first resistance unit are connected in series with the second resistance unit, wherein when the switch unit is turned on, the voltage level of the connection confirmation signal maintains the first voltage level, and when the switch unit is turned off, the voltage level of the connection confirmation signal maintains the second voltage level.
5. The charging device according to claim 1, wherein the first control unit notifies the control box to stop transmitting the alternating current when receiving the connection confirmation signal having the second voltage level via the connection confirmation terminal.
6. The charging device of claim 1, wherein the second control unit drives the temperature protection circuit to adjust the voltage level at the connection confirmation terminal to the second voltage level or a third voltage level according to the corresponding temperature signal.
7. The charging device of claim 1, wherein the abnormal connection state is that the charging gun is not properly connected to the electric vehicle.
8. A charging device is configured to charge an electric vehicle, the electric vehicle includes a first control unit and a first wireless transmission module, the first control unit is connected with the first wireless transmission module, the charging device includes:
a power plug for receiving AC power of a commercial AC power supply;
the charging gun is connected with the power plug through a charging wire and is detachably connected with the electric vehicle;
the control box is connected between the power plug and the charging gun, is configured to selectively transmit the alternating current received by the power plug to the charging gun, and comprises a second control unit;
the temperature detection circuit is electrically connected with the second control unit and used for detecting the temperature of the power plug or the control box and outputting a corresponding temperature signal when the temperature of the power plug or the control box exceeds a preset temperature level; and
and the temperature protection circuit is electrically connected with the second control unit and comprises a second wireless transmission module, when the second control unit receives the corresponding temperature signal, the second control unit drives the second wireless transmission module of the temperature protection circuit to output a wireless signal to the first wireless transmission module of the electric vehicle, and the first control unit of the electric vehicle executes a protection mechanism when receiving the wireless signal through the first wireless transmission module.
9. The charging device of claim 8, wherein the protection mechanism is to notify the control box to stop sending AC power and/or to reduce the current demand of the electric vehicle.
10. The charging device of claim 8, wherein the first wireless transmission module and the second wireless transmission module are both bluetooth transmission modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16/703,750 US11186191B2 (en) | 2018-12-07 | 2019-12-04 | Charging device for electric vehicle |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201862776728P | 2018-12-07 | 2018-12-07 | |
| US62/776,728 | 2018-12-07 |
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| CN111284340B CN111284340B (en) | 2021-09-28 |
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| TW (1) | TWI754843B (en) |
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| CN115871505A (en) * | 2023-02-23 | 2023-03-31 | 云南丁旺科技有限公司 | Power aggregation device and power aggregation system |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN111284340B (en) | 2021-09-28 |
| TWI754843B (en) | 2022-02-11 |
| TW202021835A (en) | 2020-06-16 |
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