CN111055705B - Charging connection cable for electric automobile and working method - Google Patents
Charging connection cable for electric automobile and working method Download PDFInfo
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- CN111055705B CN111055705B CN201911404305.8A CN201911404305A CN111055705B CN 111055705 B CN111055705 B CN 111055705B CN 201911404305 A CN201911404305 A CN 201911404305A CN 111055705 B CN111055705 B CN 111055705B
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- electric automobile
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000005856 abnormality Effects 0.000 claims description 99
- 238000001514 detection method Methods 0.000 claims description 56
- 230000007935 neutral effect Effects 0.000 claims description 45
- 230000002159 abnormal effect Effects 0.000 claims description 19
- 230000001681 protective effect Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 4
- 238000012502 risk assessment Methods 0.000 claims description 3
- 230000003993 interaction Effects 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
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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
- B60L53/18—Cables specially adapted for charging electric vehicles
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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
- B60L53/16—Connectors, e.g. plugs or sockets, specially adapted for charging 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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Abstract
The invention discloses a charging connection cable for an electric automobile and a working method thereof, which are used for being connected to a power supply socket arranged on a power grid to take power and being connected to a vehicle socket arranged on the electric automobile to provide a charging power supply for the electric automobile. The invention has the primary protection and the secondary protection, and can improve the charging safety of the electric automobile, wherein the secondary protection function can realize the interaction with the automobile and the user, and the charging safety is improved by a manual intervention mode.
Description
Technical Field
The invention relates to the technical field of electric automobile charging devices, in particular to a primary and secondary protection charging connection cable based on a temperature switch.
Background
The electric vehicle must be thermally protected during charging, otherwise, there is a risk of overheating. The charging connection cable in the prior art is also generally provided with a temperature detection and temperature regulation device, the charging strategy is changed by monitoring the charging cable through a temperature sensor, and safe charging is realized on the premise of ensuring that a circuit is not overheated.
However, the charging connection cable in the prior art has the following defects that firstly, the control mode is original, the charging strategy of the charging connection cable can be controlled only through a temperature sensor, and the communication between the charging connection cable and a vehicle and between the charging connection cable and a user can not be realized; secondly, when the charging connection cable is damaged due to an excessive temperature, the control device for charging control may be damaged.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the primary and secondary protection charging connecting cable based on the temperature switch, and solves the technical problem that the thermal protection function of the charging connecting cable of the electric automobile is not sound in the prior art.
In order to achieve the above object, the present invention adopts the following technical scheme:
a charging connection cable for an electric automobile for being connected to a power supply socket installed on a power grid to take electricity, and for being connected to a vehicle socket installed on the electric automobile to supply charging power to the electric automobile, the charging connection cable comprising:
a power supply plug which can be connected or disconnected with a power supply socket installed on the utility power grid side;
a vehicle connector that is connectable to or disconnectable from a vehicle socket mounted on an electric vehicle;
the temperature switch is a temperature sensitive switch and is composed of two metal sheets with different thermal expansion coefficients, and in general, the two metal sheets are tightly connected together to form a closed circuit, and when the temperature exceeds the sensitive temperature, the two metal sheets are separated from each other due to the different thermal expansion coefficients, so that an open circuit is formed. Depending on the detection requirements, the temperature switch may be arranged at all possible positions of the charging connection cable where an over-temperature may occur, such as on the cable, after the connection point of the power supply plug with the power supply socket, before the connection point of the vehicle connector with the vehicle socket, etc. The circuit is connected in series with a phase line, a neutral line or a protection line at the position of the circuit.
As an alternative of the present invention, the aforementioned charging connection cable for electric vehicles implements primary protection by a temperature switch: when the temperature of the position of the power supply plug and the power supply socket is detected to exceed the set value by any one or more temperature switches on the cable, after the power supply plug and the power supply socket are connected, before the vehicle connector and the vehicle socket are connected, the phase line, the neutral line or the circuit on the protection circuit of the position of the power supply plug and the power supply socket are cut off, so that the charging power supply for charging the electric automobile is stopped by the charging connection cable, and one-time protection is implemented.
The charging connection cable for an electric automobile may further include:
the charging abnormality detection and safety control box is used for detecting connection and safety abnormality of an electric loop of the charging connecting cable during operation of supplying power to the electric automobile and also used for receiving abnormality notification of the automobile. The risk is evaluated, and protection measures such as abnormal prompt, abnormal intervention and the like are further implemented;
the temperature switch is a temperature sensitive switch, and the structure and the working principle are the same as the above. According to the detection requirement, the temperature switch can be arranged at any position in front of the abnormality detection module of the charging abnormality detection and safety control box after the connection point of the power supply plug and the power supply socket on the cable, and the circuit is connected in series on the phase line or the neutral line or the protection line at the position of the temperature switch.
As an alternative scheme of the invention, two independent lines independent of a phase line, a neutral line and a protection grounding line are arranged between the electric automobile charging connection cable, the automobile connector and the charging abnormality detection and safety control box:
the charging connecting cable is used for transmitting signals to the electric automobile;
the signal transmission device is used for transmitting signals from the electric automobile to the charging connection cable.
As an alternative to the present invention, the foregoing charge abnormality detection and safety control box,
the power supply plug is arranged on a charging connection cable, after the power supply plug receives a power supply connection point provided by a power supply socket, the power supply connection point can be physically and morphologically provided by a vehicle connector to the vehicle socket:
1) Integrated with power plugs, or
2) Integrated with vehicle connectors, or
3) Is separately arranged at any position on the cable between the power supply plug and the vehicle connector.
As an alternative of the present invention, the charging connection cable for an electric vehicle, the charging abnormality detection and safety control box includes:
an abnormality detection module and an abnormality prompt module of the low-voltage part;
the relay/contactor of the high voltage part is used for switching on or off the phase line or the neutral line and or the protective grounding line.
The abnormality detection module, the abnormality prompting module and the control coil of the relay/contactor form a circuit and logic connection relation and are independently connected to the power supply plug to receive power supply from the power supply plug, and power is taken from the phase line and the neutral line or the phase line and the protection ground line or the phase line and the neutral line and the protection ground line before all the temperature switch connection points after the power supply connection points of the power supply socket are received.
The main contact of the relay/contactor is connected in series with a circuit of a phase line or a neutral line or a protective grounding wire.
The charging connection cable for the electric automobile is characterized in that the charging connection cable for the electric automobile comprises the following steps:
when the abnormality detection module detects: (1) the charging connection cable performs the following steps when the electric circuit connection and safety of the electric automobile power supply are abnormal, (2) the electric automobile is abnormal through signal notification:
1) Performing risk assessment, informing the user of risk through an abnormality prompting module, and/or
2) Informing the vehicle of risk, and/or
3) The main contact of the relay/contactor is cut off by controlling the low voltage control coil of the relay/contactor, thereby disconnecting the phase line and/or neutral line and/or ground protection line.
When the abnormality detection module detects: (1) when the charging connection cable is connected to the electric circuit during the operation of the electric vehicle power supply and the safety abnormality is released, (2) when the electric vehicle signals the abnormality release, the following steps are performed:
1) The abnormality detection module informs the user of risk release through the abnormality prompt module,
2) The vehicle is notified of the risk release,
3) The main contact of the relay/contactor is closed by controlling the low voltage control coil of the relay/contactor, thereby switching on the phase line and/or the neutral line and/or the ground protection line.
The utility model provides a charging connection cable for electric automobile, on the aforesaid charging connection cable for electric automobile basis, carries out primary protection: when the temperature at any position or a plurality of temperature switches at any position in front of the abnormality detection module of the charging abnormality detection and safety control box detects that the temperature at the position exceeds a set value after the power supply plug and the power supply socket are connected on the cable, the phase line, the neutral line or the circuit on the protection circuit at the position can be cut off, so that the charging connection cable stops providing a charging power supply for charging the electric automobile, and primary protection is implemented.
The charging connection cable for the electric automobile can also implement secondary protection on the basis of the charging connection cable for the electric automobile, and the implementation method comprises the following steps:
when the temperature switch cuts off the circuit, after the charging connection cable stops supplying power to the electric automobile, the abnormality detection module can identify the cutting off of the temperature switch because of the independence of the power taking circuit, thereby implementing the following steps:
1) The risk of the user is informed by the abnormality alert module,
2) The risk of the vehicle is notified,
3) The main contact of the relay/contactor is cut off through the low-voltage control coil of the relay/contactor, so that the phase line, the neutral line and the grounding protection line are disconnected, and secondary protection is implemented, and when the abnormality occurs, the secondary protection can be set as unrecoverable when the abnormality is relieved;
4) And the user can not recover again until the risk is thoroughly eliminated by checking and the power supply plug is unplugged again, and the power-off reset treatment is carried out on the abnormality detection module. The invention has the beneficial effects that:
compared with the prior art: the temperature switch can realize primary protection, and when the charging temperature is abnormal, the phase line or the neutral line of the position of the temperature switch or a circuit on a protection circuit can be cut off in time, so that the charging connection cable stops supplying a charging power supply for charging the electric automobile, and primary protection is implemented. The invention can also carry out secondary protection, and when the charging abnormality detection and safety control box is used for detecting the connection and safety abnormality of the electric loop of the charging connecting cable during the operation of providing power for the electric automobile, the charging abnormality detection and safety control box is also used for receiving the abnormality notification of the automobile. And evaluating the risk, and further implementing protection measures such as abnormal prompt, abnormal intervention and the like. And informing a user of risk, informing the vehicle of risk, and cutting off the phase line and/or the neutral line and/or the grounding protection line through the abnormality prompting module, so that secondary protection is implemented. Further, when such an abnormality occurs, it may be set that the secondary protection is not recoverable when the abnormality is released.
Detailed Description
The invention is further described below. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
The embodiment discloses charging connection cable for electric automobile for be connected to the power supply socket who installs at the electric wire netting and get the electricity, and be connected to the vehicle socket who installs on electric automobile and provide charging source for electric automobile, this charging connection cable possesses:
a power supply plug which can be connected or disconnected with a power supply socket installed on the utility power grid side;
a vehicle connector that is connectable to or disconnectable from a vehicle socket mounted on an electric vehicle;
the temperature switch is a temperature sensitive switch and comprises two metal sheets with different thermal expansion coefficients, and in general (under normal use state), the two metal sheets are tightly connected together to form a closed circuit, and when the temperature exceeds the sensitive temperature, the two metal sheets are separated from each other due to the different thermal expansion coefficients, so that an open circuit is formed. Depending on the detection requirements, the temperature switch may be arranged at all possible positions of the charging connection cable where an over-temperature may occur, such as on the cable, after the connection point of the power supply plug with the power supply socket, before the connection point of the vehicle connector with the vehicle socket, etc. The circuit is connected in series with a phase line, a neutral line or a protection line at the position of the circuit. The terms "before" and "after" refer to the direction of current flow during normal charging.
The primary protection is implemented by a temperature switch: when the temperature of the position of the power supply plug and the power supply socket is detected to exceed the set value by any one or more temperature switches on the cable, after the power supply plug and the power supply socket are connected, before the vehicle connector and the vehicle socket are connected, the phase line, the neutral line or the circuit on the protection circuit of the position of the power supply plug and the power supply socket are cut off, so that the charging power supply for charging the electric automobile is stopped by the charging connection cable, and one-time protection is implemented.
On the basis of the charging connection cable, this embodiment may further include: the charging abnormality detection and safety control box is used for detecting connection and safety abnormality of an electric loop of the charging connecting cable during operation of supplying power to the electric automobile and also used for receiving abnormality notification of the automobile. And evaluating the risk, and further implementing protection measures such as abnormal prompt, abnormal intervention and the like.
The temperature switch is a temperature sensitive switch, and the structure and the working principle are the same as those of the embodiment. According to the detection requirement, the temperature switch can be arranged at any position in front of the abnormality detection module of the charging abnormality detection and safety control box after the connection point of the power supply plug and the power supply socket on the cable, and the circuit is connected in series on the phase line or the neutral line or the protection line at the position of the temperature switch.
Two independent lines independent of a phase line, a neutral line and a protection grounding line are arranged between the vehicle connector and the charging abnormality detection and safety control box:
one of the charging connecting cables is used for transmitting signals to the electric automobile;
the other one is used for transmitting signals from the electric automobile to the charging connecting cable.
The abnormal detection and safety control box charges, and it sets up on charging connecting cable, and after the power supply plug received the power supply socket provided the power tie point, before the vehicle connector provided the power tie point to the vehicle socket, physical form can be in the aspect of:
1) Integrated with power plugs, or
2) Integrated with vehicle connectors, or
3) Is separately arranged at any position on the cable between the power supply plug and the vehicle connector.
The charge abnormality detection and safety control box of the present embodiment includes:
an abnormality detection module and an abnormality prompt module of the low-voltage part;
the relay/contactor of the high voltage part is used for switching on or off the phase line or the neutral line and or the protective grounding line.
The abnormality detection module, the abnormality prompting module and the control coil of the relay/contactor form a circuit and logic connection relation and are independently connected to the power supply plug to receive power supply from the power supply plug, and power is taken from the phase line and the neutral line or the phase line and the protection ground line or the phase line and the neutral line and the protection ground line before all the temperature switch connection points after the power supply connection points of the power supply socket are received.
The main contact of the relay/contactor is connected in series with a circuit of a phase line or a neutral line or a protective grounding wire.
The charging connection cable of the present embodiment implements the following method:
when the abnormality detection module detects: (1) the charging connection cable performs the following steps when the electric circuit connection and safety of the electric automobile power supply are abnormal, (2) the electric automobile is abnormal through signal notification:
1) Performing risk assessment, informing a user of risk through an abnormality prompting module,
2) The risk of the vehicle is notified,
3) The main contact of the relay/contactor is cut off by controlling the low voltage control coil of the relay/contactor, thereby disconnecting the phase line and/or neutral line and/or ground protection line.
When the abnormality detection module detects: (1) when the charging connection cable is connected to the electric circuit during the operation of the electric vehicle power supply and the safety abnormality is released, (2) when the electric vehicle signals the abnormality release, the following steps are performed:
1) The abnormality detection module informs the user of risk release through the abnormality prompt module,
2) The vehicle is notified of the risk release,
3) The main contact of the relay/contactor is closed by controlling the low voltage control coil of the relay/contactor, thereby switching on the phase line and/or the neutral line and/or the ground protection line.
The charging connection cable for the electric automobile of the embodiment includes primary protection and secondary protection.
And (3) performing primary protection: when the temperature at any position or a plurality of temperature switches at any position in front of the abnormality detection module of the charging abnormality detection and safety control box detects that the temperature at the position exceeds a set value after the power supply plug and the power supply socket are connected on the cable, the phase line, the neutral line or the circuit on the protection circuit at the position can be cut off, so that the charging connection cable stops providing a charging power supply for charging the electric automobile, and primary protection is implemented.
Secondary protection may also be implemented as follows:
when the temperature switch cuts off the circuit, after the charging connection cable stops supplying power to the electric automobile, the abnormality detection module can identify the cutting off of the temperature switch because of the independence of the power taking circuit, thereby implementing the following steps:
1) Informing the user of risk through an abnormality prompting module, and/or
2) Informing the vehicle of risk, and/or
3) The main contact of the relay/contactor is cut off through the low-voltage control coil of the relay/contactor, so that the phase line, the neutral line and the grounding protection line are disconnected, and secondary protection is implemented, and when the abnormality occurs, the secondary protection can be set as unrecoverable when the abnormality is relieved;
4) And the user can not recover again until the risk is thoroughly eliminated by checking and the power supply plug is unplugged again, and the power-off reset treatment is carried out on the abnormality detection module.
Compared with the prior art, the temperature switch of the embodiment can realize primary protection, and when the charging temperature is abnormal, the circuit on the phase line or the neutral line or the protection circuit at the position of the temperature switch can be cut off in time, so that the charging connection cable stops supplying the charging power supply for charging the electric automobile, and primary protection is implemented. The embodiment can also perform secondary protection, and when the charging abnormality detection and safety control box is used for detecting connection and safety abnormality of the electric loop of the charging connecting cable during the operation of providing power for the electric automobile, the charging abnormality detection and safety control box is also used for receiving abnormality notification of the automobile. And evaluating the risk, and further implementing protection measures such as abnormal prompt, abnormal intervention and the like. And informing a user of risk, informing the vehicle of risk, and cutting off the phase line and/or the neutral line and/or the grounding protection line through the abnormality prompting module, so that secondary protection is implemented. Further, when such an abnormality occurs, it may be set that the secondary protection is not recoverable when the abnormality is released.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (6)
1. The utility model provides a method of operation of charging connection cable for electric automobile, its characterized in that, charging connection cable for electric automobile is used for being connected to the power supply socket who installs at the electric wire netting and gets the electricity to be connected to the vehicle socket who installs on electric automobile and provide charging source for electric automobile, and this charging connection cable includes:
a power supply plug which can be connected or disconnected with a power supply socket installed on the utility power grid side;
a vehicle connector that is connectable to or disconnectable from a vehicle socket mounted on an electric vehicle;
the arrangement position of the temperature switch comprises a cable, a phase line, a neutral line or a protection line at the position where the temperature switch is connected in series after the connection point of the power supply plug and the power supply socket and before the connection point of the vehicle connector and the vehicle socket;
the primary protection is implemented by a temperature switch: when any one or more temperature switches on the cable, after the power supply plug is connected with the power supply socket and before the vehicle connector is connected with the vehicle socket detect that the temperature at the position exceeds a set value, the circuit on the phase line or the neutral line or the protection line at the position is cut off to stop the supply of the charging power supply for charging the electric automobile by the charging connection cable, so that primary protection is implemented;
further comprises:
the charging abnormality detection and safety control box is used for detecting connection and safety abnormality of an electric loop of the charging connecting cable in the working period of providing power for the electric automobile, receiving abnormality notification of the automobile, evaluating risk, further implementing abnormality prompt and abnormality intervention;
the charge abnormality detection and safety control box includes:
an abnormality detection module and an abnormality prompting module of the low-voltage part,
a relay/contactor of the high voltage part for switching on or off the phase line and/or the neutral line and/or the protective earth line;
the abnormality detection module, the abnormality prompting module and the control coil of the relay/contactor form a circuit and logic connection relation and are independently connected to the power supply plug to receive power supply plug power supply connection points and power is taken from the phase line + neutral line or the phase line + protection ground line or the phase line + neutral line + protection ground line before all the temperature switch connection points;
the main contact of the relay/contactor is connected in series with a circuit of a phase line or a neutral line or a protective grounding wire;
based on the charging connection cable for the electric automobile, the following method is implemented:
when the abnormality detection module detects: (1) the charging connection cable performs the following steps when the electric circuit connection and safety of the electric automobile power supply are abnormal, (2) the electric automobile is abnormal through signal notification:
1) Performing risk assessment, informing a user of risk through an abnormality prompting module,
2) The risk of the vehicle is notified,
3) The low-voltage control coil of the control relay/contactor cuts off a phase line and/or a neutral line and/or a grounding protection line through a main contact of the relay/contactor;
when the abnormality detection module detects: (1) when the electric circuit connection and the safety abnormality are released during the operation of charging the electric vehicle, the charging connection cable (2) when the electric vehicle signals the abnormality release, the following steps are performed:
1) The abnormality detection module informs the user of risk release through the abnormality prompt module,
2) The vehicle is notified of the risk release,
3) The main contact of the relay/contactor is closed by controlling the low voltage control coil of the relay/contactor, thereby switching on the phase line and/or the neutral line and/or the ground protection line.
2. The method according to claim 1, wherein two independent lines independent of the phase line, the neutral line and the protection ground line are provided between the vehicle connector and the charging abnormality detection and safety control box:
the charging connecting cable is used for transmitting signals to the electric automobile;
the other one is used for transmitting signals from the electric automobile to the charging connecting cable.
3. The working method of the charging connection cable for electric automobile according to claim 1, wherein: the abnormal charging detection and safety control box is arranged on a charging connection cable, and after a power supply plug receives a power supply connection point provided by a power supply socket, a physical form is adopted before a vehicle connector provides the power supply connection point for the vehicle socket:
1) Integrated with power plugs, or
2) Integrated with vehicle connectors, or
3) Is separately arranged at any position on the cable between the power supply plug and the vehicle connector.
4. The utility model provides a method of operation of charging connection cable for electric automobile, its characterized in that, charging connection cable for electric automobile is used for being connected to the power supply socket who installs at the electric wire netting and gets the electricity to be connected to the vehicle socket who installs on electric automobile and provide charging source for electric automobile, and this charging connection cable includes:
a power supply plug which can be connected or disconnected with a power supply socket installed on the utility power grid side;
a vehicle connector that is connectable to or disconnectable from a vehicle socket mounted on an electric vehicle;
the arrangement position of the temperature switch comprises a cable, a phase line, a neutral line or a protection line at the position where the temperature switch is connected in series after the connection point of the power supply plug and the power supply socket and before the connection point of the vehicle connector and the vehicle socket;
the primary protection is implemented by a temperature switch: when any one or more temperature switches on the cable, after the power supply plug is connected with the power supply socket and before the vehicle connector is connected with the vehicle socket detect that the temperature at the position exceeds a set value, the circuit on the phase line or the neutral line or the protection line at the position is cut off to stop the supply of the charging power supply for charging the electric automobile by the charging connection cable, so that primary protection is implemented;
further comprises:
the charging abnormality detection and safety control box is used for detecting connection and safety abnormality of an electric loop of the charging connecting cable in the working period of providing power for the electric automobile, receiving abnormality notification of the automobile, evaluating risk, further implementing abnormality prompt and abnormality intervention;
the charge abnormality detection and safety control box includes:
an abnormality detection module and an abnormality prompting module of the low-voltage part,
a relay/contactor of the high voltage part for switching on or off the phase line and/or the neutral line and/or the protective earth line;
the abnormality detection module, the abnormality prompting module and the control coil of the relay/contactor form a circuit and logic connection relation and are independently connected to the power supply plug to receive power supply plug power supply connection points and power is taken from the phase line + neutral line or the phase line + protection ground line or the phase line + neutral line + protection ground line before all the temperature switch connection points;
the main contact of the relay/contactor is connected in series with a circuit of a phase line or a neutral line or a protective grounding wire;
based on the working method of the charging connection cable for the electric automobile, the secondary protection is implemented, and the implementation method is as follows:
when the temperature switch cuts off the circuit, after the charging connection cable stops supplying power to the electric automobile, the abnormality detection module recognizes the cutting off of the temperature switch, thereby implementing the following steps:
1) The risk of the user is informed by the abnormality alert module,
2) The risk of the vehicle is notified,
3) The main contact of the relay/contactor is cut off through the low-voltage control coil of the relay/contactor, so that the phase line, the neutral line and the grounding protection line are disconnected, secondary protection is implemented, and when the abnormality occurs, the secondary protection is not restored when the abnormality is set to be relieved;
4) And the user can not recover again until the risk is thoroughly eliminated by checking and the power supply plug is unplugged again, and the power-off reset treatment is carried out on the abnormality detection module.
5. The method according to claim 1, wherein two independent lines independent of the phase line, the neutral line and the protection ground line are provided between the vehicle connector and the charging abnormality detection and safety control box:
the charging connecting cable is used for transmitting signals to the electric automobile;
the other one is used for transmitting signals from the electric automobile to the charging connecting cable.
6. The working method of the charging connection cable for electric automobile according to claim 1, wherein: the abnormal charging detection and safety control box is arranged on a charging connection cable, and after a power supply plug receives a power supply connection point provided by a power supply socket, a physical form is adopted before a vehicle connector provides the power supply connection point for the vehicle socket:
1) Integrated with power plugs, or
2) Integrated with vehicle connectors, or
3) Is separately arranged at any position on the cable between the power supply plug and the vehicle connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911404305.8A CN111055705B (en) | 2019-12-31 | 2019-12-31 | Charging connection cable for electric automobile and working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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