CN113765182A - Electric shock prevention control method, electric shock prevention control circuit, electric shock prevention control device, medium, charging device and vehicle - Google Patents
Electric shock prevention control method, electric shock prevention control circuit, electric shock prevention control device, medium, charging device and vehicle Download PDFInfo
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- CN113765182A CN113765182A CN202111014362.2A CN202111014362A CN113765182A CN 113765182 A CN113765182 A CN 113765182A CN 202111014362 A CN202111014362 A CN 202111014362A CN 113765182 A CN113765182 A CN 113765182A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000002265 prevention Effects 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 41
- 230000000740 bleeding effect Effects 0.000 claims abstract description 30
- 238000007599 discharging Methods 0.000 claims description 30
- 238000004590 computer program Methods 0.000 claims description 13
- 238000004891 communication Methods 0.000 claims description 5
- 238000012937 correction Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 206010014357 Electric shock Diseases 0.000 description 34
- 238000010586 diagram Methods 0.000 description 14
- 230000006870 function Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00308—Overvoltage protection
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
- H02H9/047—Free-wheeling circuits
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
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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
- Y02T90/14—Plug-in electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses an electric shock prevention control method, a circuit, equipment, a medium, a charging device and a vehicle, wherein the electric shock prevention control method of the charging device comprises the following steps: after receiving a charging completion signal, controlling the bleeding circuit to bleed the charging module; and judging whether the discharge is finished or not according to the detection result of the voltage detection module. The invention can quickly discharge the high voltage output by the charging device to be below the human body safety voltage.
Description
Technical Field
The invention relates to the technical field of charging devices, in particular to an electric shock prevention control method, circuit, equipment, medium, charging device and vehicle.
Background
With the vigorous development of new energy automobiles, the rapid charging of new energy automobiles becomes a new market demand. The high-voltage and high-power charging device provides power for the development of new energy automobiles. However, the output voltage of some charging devices can reach 750V, but the safety voltage of human body is below 36V, so how to successfully discharge when the charging device switches between charging and power-off of the vehicle until the high voltage in the whole circuit of the charging device is reduced to the safety voltage that the human body can bear is an urgent need for solving the problem by those skilled in the art.
Disclosure of Invention
The embodiment of the invention provides an electric shock prevention control method for a charging device, wherein the charging device comprises a control module, a voltage detection module, a charging module and a discharge circuit, and the control method comprises the following steps:
after receiving a charging completion signal, controlling the bleeding circuit to bleed the charging module;
and judging whether the discharge is finished or not according to the detection result of the voltage detection module.
Further, the bleeding circuit includes a discharge switch and a load module, and the controlling the bleeding circuit to bleed the charging module includes:
controlling the discharge switch in the bleeding circuit to be closed or opened to bleed the charging module via the load module.
Further, the load module is a resistive load, and the controlling the discharge switch in the bleeding circuit to be closed or opened to bleed the charging module via the load module includes: closing the discharge switch so that the bleed circuit bleeds the charging module.
Further, the load module is a capacitive load, and the controlling the discharge switch in the bleeding circuit to be closed or opened to bleed the charging module via the load module includes: and disconnecting the discharge switch, so that the bleeder circuit bleeds the charging module.
Further, the determining whether the discharging is completed according to the detection result of the voltage detection module includes:
and if the output voltage of the charging device is reduced to be lower than a first preset threshold K within a first preset time t, judging that the discharging is finished.
Further, the first predetermined time period t is selected within the range that t is less than or equal to 1 s.
Further, the first predetermined threshold K is selected in the range of K ≦ 60V.
Further, the voltage detection module is further configured to determine an operating state of the charging device, and determine the operating state of the charging device according to the output voltage of the charging device, including:
comparing the output voltage of the charging device with a second predetermined threshold;
if the output voltage of the charging device is higher than or equal to the second preset threshold value, determining that the working state of the charging device is a charging state;
and if the output voltage of the charging device is lower than the second preset threshold value, determining that the working state of the charging device is a non-charging state.
Further, the second predetermined threshold W is selected in the range W > 300V.
The embodiment of the invention provides an electric shock prevention control circuit of a charging device, which is used for solving the technical problem of potential safety hazard of the existing electric vehicle charging device due to overhigh output voltage, and comprises the following components: the charging circuit comprises a charging module, a voltage detection module, a control module and a bleeder circuit;
the charging module is used for charging the electric automobile;
the bleeder circuit is connected with the charging module and used for discharging the charging module;
the voltage detection module is connected with the output end of the charging module and is used for detecting the output voltage of the charging module;
the control module is connected with the voltage detection module and is configured to: after receiving a charging completion signal, controlling the bleeding circuit to bleed the charging module; and judging whether the discharge is finished or not according to the detection result of the voltage detection module.
Further, the device also comprises an auxiliary power supply module, wherein the auxiliary power supply module is used for being connected with an alternating current power supply to supply power for the voltage detection module, the control module and the bleeder circuit.
Further, the bleeding circuit includes:
the load module is used for consuming the residual electric energy on the charging device;
the discharging switch is connected between the load module and the charging module and used for controlling whether the bleeder circuit bleeds the charging module or not;
wherein the control module is configured to: controlling the discharge switch in the bleeding circuit to be closed or opened to bleed the charging module via the load module.
Further, the load module is a resistive load, and the control module is configured to: closing the discharge switch so that the bleed circuit bleeds the charging module.
Further, the load module is a capacitive load, and the control module is configured to: and disconnecting the discharge switch, so that the bleeder circuit bleeds the charging module.
Further, the charging device protection against electric shock control circuit still includes:
and the CAN communication module is connected between the control module and the auxiliary power supply module and is used for communicating the control module and the auxiliary power supply module.
Further, the charging module includes:
the power factor correction circuit is used for correcting the input voltage of the charging module;
and the direct current-to-direct current conversion module is used for converting the corrected voltage into the voltage required by the electric automobile.
Further, the control module is further configured to: and judging that the output voltage of the charging device is reduced to be lower than a first preset threshold K within a first preset time t, and judging that the discharging is finished.
The embodiment of the invention also provides computer equipment for solving the technical problem that the existing electric vehicle charging device has potential safety hazard due to overhigh output voltage.
The embodiment of the invention also provides a computer readable storage medium for solving the technical problem that the existing electric vehicle charging device has potential safety hazard due to overhigh output voltage, and the computer readable storage medium stores a computer program for executing the anti-electric shock control method of the charging device.
The embodiment of the invention also provides a charging device, which is used for solving the technical problem that the existing charging device for the electric automobile has potential safety hazard due to overhigh output voltage, and comprises: the charging device electric shock prevention control circuit is provided.
The embodiment of the invention also provides a motor vehicle, which is used for solving the technical problem that the existing electric automobile charging device has potential safety hazard due to overhigh output voltage, and comprises: the charging device is provided.
According to the anti-electric shock control method and circuit for the charging device, the computer device and the computer readable storage medium, after the charging completion signal of the charging device is received, the discharging circuit in the charging device is controlled to discharge the charging module, and whether the discharging is completed or not is judged according to the detection result of the voltage detection module in the charging device. According to the embodiment of the invention, the high voltage output by the charging device can be quickly discharged to be below the human body safety voltage, so that the electric shock risk of the charging device is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:
fig. 1 is a schematic diagram of an anti-electric shock control circuit of a charging device according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating an implementation of an anti-electric shock control circuit of a charging device according to an embodiment of the present invention;
fig. 3 is a flowchart of an anti-electric shock control method for a charging device according to an embodiment of the present invention;
fig. 4 is a flowchart of an alternative method for controlling an electric shock protection of a charging device according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a computer device provided in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
Fig. 1 is a schematic diagram of an electric shock protection control circuit of a charging device according to an embodiment of the present invention, and as shown in fig. 1, the electric shock protection control circuit of the charging device includes: the charging module 10, the voltage detection module 20, the control module 30 and the bleeding circuit 40;
the charging module 10 is used for charging the electric automobile; the bleeder circuit 40 is connected with the charging module 10 and used for bleeding the charging module 10; the voltage detection module 20 is connected with the output end of the charging module 10 and is used for detecting the output voltage of the charging module; a control module 30, connected to the voltage detection module 20, configured to: after receiving the charging completion signal, controlling the bleeding circuit 40 to bleed the charging module 10; and judges whether the discharge is completed according to the detection result of the voltage detection module 20.
It should be noted that the control module 30 in the embodiment of the present invention may adopt a Micro Controller Unit (MCU), for example, a single chip microcomputer. The voltage detection module in the embodiment of the invention can realize the acquisition of voltage in a resistor voltage division mode.
In one embodiment, the control module 30 is further configured to: and judging that the output voltage of the charging device is reduced to be lower than a first preset threshold K within a first preset time t, and judging that the discharging is finished. Preferably, the first predetermined period of time t is selected in the range t ≦ 1 s. More preferably, t is 1 s. Preferably, the first predetermined threshold K is selected in the range K ≦ 60V. More preferably, K ═ 60V. More preferably, K ═ 36V. Whether the output voltage of the charging device is reduced to a certain preset threshold value within a preset time period is detected, whether the discharging of the charging device is completed is determined, the high voltage output by the charging device can be ensured to be discharged below the human body safety voltage, and the electric shock risk of the charging device is avoided.
In order to supply power to each module in the circuit, in one embodiment, the charging device electric shock prevention control circuit provided in the embodiment of the present invention further includes an auxiliary power module 50, and the auxiliary power module 50 is configured to be connected to the ac power source 60 to supply power to the voltage detection module 20, the control module 30, and the bleeding circuit 40.
In order to achieve fast draining of the charging module 10, in one embodiment, in the anti-electric shock control circuit of the charging device provided in the embodiment of the present invention, the draining circuit 40 may include: a load module 401 for consuming the remaining power on the charging device; the discharging switch 402 is connected between the load module 401 and the charging module 10, and is used for controlling whether the bleeding circuit 40 bleeds the charging module; in this embodiment, the control module 30 is configured to: the closing or opening of the discharge switch 402 in the bleeding circuit 40 is controlled to bleed the charging module 10 via the load module 401.
The load module 401 in the embodiment of the present invention may be any device or apparatus capable of consuming electric energy.
In one embodiment, the load module 401 is a resistive load, and the control module 30 is configured to: the discharge switch 402 is closed so that the bleed circuit 40 bleeds the charging module 10. With this embodiment, the charging device can be discharged with some resistive load.
In another embodiment, the load module 401 is a capacitive load, and the control module 30 is configured to: the discharge switch 402 is opened so that the bleed circuitry 40 bleeds the charging module 10. By this embodiment, the charging device can be discharged with some capacitive load.
Optionally, in the anti-electric shock control circuit of the charging device provided in the embodiment of the present invention, the discharge switch may adopt any one of the following: relay, MOSFET transistor, IGBT transistor.
In order to achieve a fast discharge response of the charging device, in one embodiment, the charging device electric shock protection control circuit provided in an embodiment of the present invention may further include: and the CAN communication module 70 is connected between the control module 30 and the auxiliary power supply module 10, and is used for communicating the control module 30 with the auxiliary power supply module 10.
In order to improve the power supply efficiency of the power supply, in an embodiment of the present invention, in the anti-electric shock control circuit of the charging device, the charging module 10 includes: a power factor correction circuit 101 for correcting an input voltage of the charging module 10; and a dc-dc conversion module 102, configured to convert the corrected voltage into a voltage required by the electric vehicle. In this embodiment, the power factor of the power supply can be improved, the reactive current can be reduced, the line loss can be reduced, and the power supply quality of the power grid can be improved through the power factor correction circuit 101.
Fig. 2 is a schematic diagram of a specific implementation of an anti-electric shock control circuit of a charging device according to an embodiment of the present invention, and as shown in fig. 2, a current detection module detects an input current at an ac input end through a U1 current collection chip; the PFC is completed by a PFC chip U2; the DC-DC module is completed through a DC-DC control chip U3; the discharge switch is completed by a relay RL1, a MOSFET transistor Q3 and an IGBT transistor Q2; the load module is completed by a Positive Temperature Coefficient (PTC); the auxiliary power supply module generates power consumption voltage required by the whole system through an auxiliary power supply chip U6; CAN communication is accomplished through CAN communication module U5.
Based on the same inventive concept, the embodiment of the invention also provides an electric shock prevention control method of the charging device, which can be applied to but not limited to the electric shock prevention control circuit of the charging device.
Fig. 3 is a flowchart of an electric shock protection control method for a charging device according to an embodiment of the present invention, as shown in fig. 3, the method includes the following steps:
s301, after receiving a charging completion signal, controlling a discharge circuit to discharge the charging module;
and S302, judging whether the discharge is finished or not according to the detection result of the voltage detection module.
In specific implementation, whether the discharging is finished or not can be judged according to the detection result of the voltage detection module through the following steps: and if the output voltage of the charging device is reduced to be lower than a first preset threshold K within a first preset time t, judging that the discharging is finished. Preferably, the first predetermined period of time t is selected in the range t ≦ 1 s. More preferably, t is 1 s. Preferably, the first predetermined threshold K is selected in the range K ≦ 60V. More preferably, K ═ 60V. More preferably, K ═ 36V.
In order to rapidly discharge the charging device, in one embodiment, the bleeding circuit for bleeding the charging module includes a discharge switch and a load module, and when the bleeding circuit is controlled to bleed the charging module, the method may include the following steps: the closing or opening of a discharge switch in the bleeding circuit is controlled to bleed the charging module via the load module.
It should be noted that, when the charging device is in a charging state, the risk of electric shock is not generated, and therefore, the charging device does not need to be discharged; when the charging device is in a non-charging state (e.g., before charging or after charging is stopped), especially when the charging device is changed from the charging state to the non-charging state (i.e., charging is stopped), it is understood that the charging device is discharged after receiving a charging completion signal (the charging completion signal may be sent to the control module by the BMS (BATTERY MANAGEMENT SYSTEM)), so that the discharging circuit discharges the charging device to rapidly reduce the output voltage of the charging device below the human body safety voltage.
In order to quickly discharge the charging device, in one embodiment, when the charging device is in a non-charging state, the discharge switch in the bleeding circuit may be controlled to be closed or opened to bleed the charging module via the load module.
In the embodiment of the invention, the load module for discharging the charging device in the discharging circuit can be a resistive load or a capacitive load, and if the load module in the discharging circuit is a resistive load, the discharging circuit discharges the charging module in a mode of closing the discharging switch; if the load module in the bleeder circuit is a capacitive load, the bleeder circuit is enabled to bleed the charging module by disconnecting the discharging switch.
In order to accurately detect the operating state of the charging device, in an embodiment, as shown in fig. 4, the method for controlling the charging device to prevent electric shock provided in the embodiment of the present invention may determine the operating state of the charging device by the following steps:
s401, comparing the relation between the output voltage of the charging device and a second preset threshold value;
s402, if the output voltage of the charging device is higher than or equal to a second preset threshold value, determining that the working state of the charging device is a charging state;
and S403, if the output voltage of the charging device is lower than a second preset threshold, determining that the working state of the charging device is a non-charging state.
Optionally, the second predetermined threshold W is selected in the range W > 300V.
For example, when the output voltage range of the charging device is 200VDC-750VDC (variable), the operating state of the charging device is determined to be a charging state if the output voltage of the charging device is higher than or equal to 300V through a resistance voltage division form; and if the output voltage of the charging device is lower than 300V, determining that the working state of the charging device is a non-charging state.
Of course, in order to accurately detect the operating state of the charging device, in an embodiment, the anti-electric shock control circuit for a charging device provided in an embodiment of the present invention further includes: the current detection module 80 is configured to detect an input current of the charging module 10, and determine an operating state of the charging device according to the input current of the charging module 10. For example, when the input current range of the charging device is 0.1A-30A, the input current of the charging device may be sampled by the current sensor, and if the current sampling value is lower than 0.1A and there is no output voltage, it is determined that the charging device is charged (in a non-charging state), and at this time, the discharging operation of the charging device may be performed by the discharging circuit.
Based on the same inventive concept, an embodiment of the present invention further provides a computer device, so as to solve the technical problem that an existing electric vehicle charging apparatus has a potential safety hazard due to an excessively high output voltage, fig. 5 is a schematic diagram of the computer device provided in the embodiment of the present invention, as shown in fig. 5, the computer device 50 includes a memory 501, a processor 502, and a computer program stored in the memory 501 and operable on the processor 502, and the processor 502 implements the method for controlling an electric shock protection of the charging apparatus when executing the computer program.
Based on the same inventive concept, the embodiment of the invention further provides a computer readable storage medium, so as to solve the technical problem that the existing electric vehicle charging device has potential safety hazard due to overhigh output voltage.
Based on the same inventive concept, the embodiment of the invention also provides a charging device, which is used for solving the technical problem of potential safety hazard caused by overhigh output voltage of the existing charging device for the electric automobile, and the charging device comprises: the charging device in the above embodiment is an electric shock prevention control circuit.
Based on the same inventive concept, the embodiment of the invention also provides a motor vehicle, which is used for solving the technical problem that the existing electric vehicle charging device has potential safety hazard due to overhigh output voltage, and comprises: the charging device in the above embodiment.
In summary, in the charging device electric shock protection circuit, the control method, the computer device, and the computer readable storage medium provided in the embodiments of the present invention, the discharging circuit for discharging the charging device is provided in the charging device, so that the discharging circuit is turned off when the charging device is in the charging state, so that the charging module normally charges the electric vehicle, and the discharging circuit is turned on when the charging device is in the non-charging state, so as to discharge the high voltage output by the charging device to a voltage lower than the human body safety voltage, thereby avoiding the occurrence of electric shock risk of the charging device.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (21)
1. A charging device electric shock prevention control method is characterized in that the charging device comprises a control module, a voltage detection module, a charging module and a discharge circuit, and the control method comprises the following steps:
after receiving a charging completion signal, controlling the bleeding circuit to bleed the charging module;
and judging whether the discharge is finished or not according to the detection result of the voltage detection module.
2. The method for controlling the charging device to prevent electric shock according to claim 1, wherein the bleeding circuit includes a discharge switch and a load module, and the controlling the bleeding circuit to bleed the charging module includes:
controlling the discharge switch in the bleeding circuit to be closed or opened to bleed the charging module via the load module.
3. The method of claim 2, wherein the load module is a resistive load, and the controlling the discharge switch in the bleeding circuit to be closed or opened to bleed the charging module via the load module comprises: closing the discharge switch so that the bleed circuit bleeds the charging module.
4. The method of claim 2, wherein the load module is a capacitive load, and the controlling the discharge switch in the bleeding circuit to be closed or opened to bleed the charging module via the load module comprises: and disconnecting the discharge switch, so that the bleeder circuit bleeds the charging module.
5. The method for controlling the charging device to prevent electric shock according to claim 1, wherein the determining whether the discharging is completed according to the detection result of the voltage detection module comprises:
and if the output voltage of the charging device is reduced to be lower than a first preset threshold K within a first preset time t, judging that the discharging is finished.
6. The charging device protection against electric shock control method according to claim 5, wherein the first predetermined period of time t is selected within a range of t ≦ 1 s.
7. The charging device protection against electric shock control method according to claim 5, wherein the first predetermined threshold K is selected in a range of K ≦ 60V.
8. The method for controlling the protection against electric shock of the charging device according to claim 1, wherein the voltage detection module is further configured to determine an operating state of the charging device, and determine the operating state of the charging device according to the output voltage of the charging device, and the method includes:
comparing the output voltage of the charging device with a second predetermined threshold;
if the output voltage of the charging device is higher than or equal to the second preset threshold value, determining that the working state of the charging device is a charging state;
and if the output voltage of the charging device is lower than the second preset threshold value, determining that the working state of the charging device is a non-charging state.
9. The charging device protection against electric shock control method according to claim 8, wherein the second predetermined threshold value W is selected in a range W > 300V.
10. A charging device protection against electric shock control circuit characterized by comprising: the charging circuit comprises a charging module, a voltage detection module, a control module and a bleeder circuit;
the charging module is used for charging the electric automobile;
the bleeder circuit is connected with the charging module and used for discharging the charging module;
the voltage detection module is connected with the output end of the charging module and is used for detecting the output voltage of the charging module;
the control module is connected with the voltage detection module and is configured to: after receiving a charging completion signal, controlling the bleeding circuit to bleed the charging module; and whether the discharge is finished or not is judged according to the detection result of the voltage detection module.
11. The charging device protection against electric shock control circuit according to claim 10, further comprising an auxiliary power supply module for connecting with an ac power supply to supply power to the voltage detection module, the control module and the bleeding circuit.
12. The charging device protection against electric shock control circuit of claim 10, wherein the bleed circuit comprises:
the load module is used for consuming the residual electric energy on the charging device;
the discharging switch is connected between the load module and the charging module and used for controlling whether the bleeder circuit bleeds the charging module or not;
wherein the control module is configured to: controlling the discharge switch in the bleeding circuit to be closed or opened to bleed the charging module via the load module.
13. The charging device protection against electric shock control circuit of claim 12, wherein the load module is a resistive load, the control module configured to: closing the discharge switch so that the bleed circuit bleeds the charging module.
14. The charging device protection against electric shock control circuit of claim 12, wherein the load module is a capacitive load, the control module configured to: and disconnecting the discharge switch, so that the bleeder circuit bleeds the charging module.
15. The charging device protection against electric shock control circuit according to claim 11, further comprising:
and the CAN communication module is connected between the control module and the auxiliary power supply module and is used for communicating the control module and the auxiliary power supply module.
16. The charging device protection against electric shock control circuit of claim 10, wherein the charging module comprises:
the power factor correction circuit is used for correcting the input voltage of the charging module;
and the direct current-to-direct current conversion module is used for converting the corrected voltage into the voltage required by the electric automobile.
17. The charging device protection against electric shock control circuit of claim 10, wherein the control module is further configured to: and judging that the output voltage of the charging device is reduced to be lower than a first preset threshold K within a first preset time t, and judging that the discharging is finished.
18. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method for controlling a charging device according to any one of claims 1 to 9 when executing the computer program.
19. A computer-readable storage medium storing a computer program for executing the charging device protection against electric shock control method according to any one of claims 1 to 9.
20. A charging device, comprising: the charging device protection against electric shock control circuit as claimed in any one of claims 10 to 17.
21. A motor vehicle, characterized by comprising: the charging device of claim 20.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111014362.2A CN113765182A (en) | 2021-08-31 | 2021-08-31 | Electric shock prevention control method, electric shock prevention control circuit, electric shock prevention control device, medium, charging device and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111014362.2A CN113765182A (en) | 2021-08-31 | 2021-08-31 | Electric shock prevention control method, electric shock prevention control circuit, electric shock prevention control device, medium, charging device and vehicle |
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| CN113765182A true CN113765182A (en) | 2021-12-07 |
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| CN202111014362.2A Pending CN113765182A (en) | 2021-08-31 | 2021-08-31 | Electric shock prevention control method, electric shock prevention control circuit, electric shock prevention control device, medium, charging device and vehicle |
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