CN112332474A - Short circuit control method, system, medium and application of silicon carbide charging power supply - Google Patents
Short circuit control method, system, medium and application of silicon carbide charging power supply Download PDFInfo
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- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 83
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 48
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 53
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 53
- 239000010703 silicon Substances 0.000 claims abstract description 53
- 238000012545 processing Methods 0.000 claims abstract description 48
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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
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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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
- B60L53/30—Constructional details of charging stations
- B60L53/31—Charging columns specially adapted for 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
- B60L53/60—Monitoring or controlling charging stations
- B60L53/62—Monitoring or controlling charging stations in response to charging parameters, e.g. current, voltage or electrical charge
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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
- H02J7/00304—Overcurrent protection
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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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- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
Abstract
The invention belongs to the technical field of charging power supplies, and discloses a short-circuit control method, a system, a medium and application of a silicon carbide charging power supply, wherein the short-circuit control method of the silicon carbide charging power supply comprises the following steps: acquiring a current charging voltage value acquired by a charging detection module; determining a target level matching the current charging voltage value; and controlling the silicon controlled module to execute corresponding target processing according to the target level. According to the invention, the target level matched with the current charging voltage value is determined according to the current charging voltage value acquired by the charging detection module acquired in real time, and the silicon controlled module is controlled to be switched on or switched off according to the target level, so that the purpose of power failure is achieved by switching off or switching off the silicon carbide module when abnormality is detected quickly and effectively, the purpose of being tens of times faster than the switching-off speed of a mechanical short-circuiting device is also achieved, the switching speed is high, the conduction loss is small, and the abnormality judgment speed and the service life of the charging power supply are greatly improved.
Description
Technical Field
The invention belongs to the technical field of charging power supplies, and particularly relates to a short-circuit control method, a short-circuit control system, a short-circuit control medium and application of a silicon carbide charging power supply.
Background
At present: as is known, the short circuit easily consumes power, and even a fire disaster occurs in severe cases, so that once the short circuit occurs, the charging pile of the electric automobile is immediately powered off to prevent the short circuit, otherwise, the charging heavy current overload and even the short circuit are caused, and the consequences are unreasonable. Most of charging piles of the existing charging power supply poll the electric energy meters through a processor on a charging pile control panel, the electric energy meters report real-time current values to the processor, the processor judges the received current values, and if the current values exceed a set overcurrent threshold, the alternating current contactor is controlled to be disconnected, so that the overcurrent protection function is completed.
However, the conventional method for processing the charging power supply consumes a long time, the alternating current contactor cannot be quickly disconnected when overcurrent occurs, and if an ammeter or a processor is abnormal and the contactor cannot be controlled to be disconnected, serious accidents are more likely to be caused.
Through the above analysis, the problems and defects of the prior art are as follows: the conventional processing method of the charging power supply consumes a long time, the alternating current contactor cannot be quickly disconnected when overcurrent occurs, and if an ammeter or a processor is abnormal and the contactor cannot be controlled to be disconnected, serious accidents are more likely to be caused.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a short circuit control method, a system, a medium and application of a silicon carbide charging power supply.
The invention is realized in such a way that the short-circuit control method of the silicon carbide charging power supply comprises the following steps:
acquiring a current charging voltage value acquired by a charging detection module;
determining a target level matching the current charging voltage value;
and controlling the silicon controlled module to execute corresponding target processing according to the target level.
Further, determining a target level that matches the current charging voltage value includes:
comparing the current charging voltage value with a preset overvoltage point voltage to obtain a comparison result;
a target level corresponding to the magnitude comparison is determined.
Further, the determining a target level corresponding to the magnitude comparison result includes:
if the magnitude comparison result represents that the current charging voltage value is lower than the preset overvoltage point voltage, determining that the target level is a high level;
if the magnitude comparison result represents that the current charging voltage value is higher than the preset overvoltage point voltage, determining that the target level is a low level;
controlling the silicon controlled module to execute corresponding target processing according to the target level, wherein the target processing comprises the following steps:
when the target level is a high level, controlling the silicon controlled module to execute a closing operation, so that the silicon carbide charging power supply works normally;
when the target level is a low level, controlling the silicon controlled module to execute a disconnection operation, so that the silicon carbide charging power supply is powered off;
further comprising:
when the target level is low level, generating alarm information, and sending the alarm information to other external equipment connected with the silicon carbide charging power supply;
wherein, alarm information is used for the carborundum charging source of sign unusual.
Further, after the step of obtaining the current charging voltage value collected by the current transformer, the method further includes:
acquiring target charging time corresponding to the current charging voltage value;
determining the charging state of the current time according to the target charging time, the current charging voltage value and the last power supply charging state;
and sending the charging state to the terminal equipment for displaying.
Further, determining the charging state of the current time according to the target charging time, the current charging voltage value and the charging state of the power supply at the last time, wherein the determining comprises the following steps:
if the last power supply state is normal, determining the current charging state corresponding to the target charging time and the current charging voltage value;
and if the last power supply state is abnormal, determining the current charging state corresponding to the current charging voltage value.
It is another object of the present invention to provide a computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of:
acquiring a current charging voltage value acquired by a charging detection module;
determining a target level matching the current charging voltage value;
and controlling the silicon controlled module to execute corresponding target processing according to the target level.
Another object of the present invention is to provide a short-circuit control system for a silicon carbide charging power supply, which implements the short-circuit control method for a silicon carbide charging power supply, the short-circuit control system comprising:
the charging detection module is used for acquiring a current charging current value, converting the current charging current value into a small current signal, and then performing voltage signal conversion processing on the small current signal to obtain a current charging voltage value;
the CPU control module is respectively electrically connected with the charging detection module and the silicon controlled module and is used for acquiring a current charging voltage value acquired by the charging detection module, determining a target level matched with the current charging voltage value and then controlling the silicon controlled module to execute corresponding target processing according to the target level;
and the silicon controlled module is used for executing the target processing instruction issued by the CPU control module.
Another object of the present invention is to provide a short-circuit protection device of a silicon carbide charging power supply that operates a short-circuit control system of the silicon carbide charging power supply, the short-circuit protection device of the silicon carbide charging power supply including: the device comprises an acquisition module, a determination module and a control module, wherein:
the acquisition module is used for acquiring the current charging voltage value acquired by the charging detection module;
the determining module is used for determining a target level matched with the current charging voltage value;
and the control module is used for controlling the silicon controlled module to execute corresponding target processing according to the target level.
Another object of the present invention is to provide a short-circuit protection control device of a silicon carbide charging power supply that operates a short-circuit control system of the silicon carbide charging power supply, the control device including: a processor and a memory, the memory for storing instructions, the processor for executing the instructions stored in the memory to cause the apparatus to perform the method of short circuit control of a silicon carbide charging power supply as described.
Another object of the present invention is to provide a charging pile equipped with the short circuit control system of the silicon carbide charging power supply.
By combining all the technical schemes, the invention has the advantages and positive effects that: the short circuit control method of the silicon carbide charging power supply comprises the following steps: acquiring a current charging voltage value acquired by a charging detection module; determining a target level matching the current charging voltage value; and controlling the silicon controlled module to execute corresponding target processing according to the target level. According to the invention, the target level matched with the current charging voltage value is determined according to the current charging voltage value acquired by the charging detection module acquired in real time, and the silicon controlled module is controlled to be switched on or switched off according to the target level, so that the purpose of power failure is achieved by switching off or switching off the silicon carbide module when abnormality is detected quickly and effectively, the purpose of being tens of times faster than the switching-off speed of a mechanical short-circuiting device is also achieved, the switching speed is high, the conduction loss is small, the abnormality judgment speed of the charging power supply is greatly improved, and the service life is greatly prolonged.
The invention provides a short-circuit control method and a control system of a silicon carbide charging power supply, aiming at solving the problem that the existing charging power supply processing method consumes longer time and is easy to cause serious accidents.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained from the drawings without creative efforts.
Fig. 1 is a flowchart of a short-circuit control method for a silicon carbide charging power supply according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a short-circuit control system of a silicon carbide charging power supply according to an embodiment of the present invention;
in fig. 2: 1. a charging detection module; 2. a CPU control module; 3. and a silicon controlled module.
Fig. 3 is a schematic diagram of a short-circuit protection device of a silicon carbide charging power supply according to an embodiment of the present invention;
in fig. 3: 4. an acquisition module; 5. a determination module; 6. and a control module.
Fig. 4 is a schematic diagram of a short-circuit protection control device of another silicon carbide charging power supply according to another embodiment of the present invention;
in fig. 4: 7. a memory; 8. a processor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In view of the problems in the prior art, the present invention provides a short circuit control method, system, medium and application of a silicon carbide charging power supply, and the present invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the short circuit control method for a silicon carbide charging power supply provided by the present invention includes the following steps:
s101: acquiring a current charging voltage value acquired by a charging detection module;
s102: determining a target level matched with the current charging voltage value;
s103: and controlling the silicon controlled module to execute corresponding target processing according to the target level.
Those skilled in the art can also implement the short-circuit control method of the silicon carbide charging power supply provided by the present invention by using other steps, and the short-circuit control method of the silicon carbide charging power supply provided by the present invention shown in fig. 1 is only one specific example.
As shown in fig. 2, the short circuit control system of the silicon carbide charging power supply provided by the present invention includes:
the charging detection module 1 is used for acquiring a current charging current value, converting the current charging current value into a small current signal, and then performing voltage signal conversion processing on the small current signal to obtain a current charging voltage value;
the CPU control module 2 is electrically connected with the charging detection module 1 and the silicon controlled module 3 and is used for acquiring a current charging voltage value acquired by the charging detection module 1, determining a target level matched with the current charging voltage value and controlling the silicon controlled module 3 to execute corresponding target processing according to the target level;
and the silicon controlled module 3 is used for executing the target processing instruction issued by the CPU control module 2.
The technical solution of the present invention is further described below with reference to the accompanying drawings.
Silicon controlled rectifier: a Silicon Controlled Rectifier (SCR) is a high-power electrical component, also called a thyristor. It has the advantages of small volume, high efficiency, long service life, etc. In an automatic control system, the device can be used as a high-power driving device to realize the control of high-power equipment by using a low-power control. It is widely applied to speed regulating systems, power regulating systems and follow-up systems of alternating current and direct current motors. The controllable silicon is divided into a unidirectional controllable silicon and a bidirectional controllable silicon. The TRIAC is also called a TRIAC, abbreviated to TRIAC. The bidirectional thyristor is structurally equivalent to two unidirectional thyristors which are reversely connected, and the bidirectional thyristor has a bidirectional conduction function. The on-off state of which is determined by the gate G. The positive (or negative) pulse is applied to the control electrode G to turn it on in the positive (or reverse) direction. The device has the advantages of simple control circuit and no reverse voltage resistance problem, and is particularly suitable for being used as an alternating-current contactless switch.
A central processing unit: a Central Processing Unit (CPU) is a final execution unit for information processing and program operation, and serves as an operation and control core of a computer system. The CPU is one of the main devices of an electronic computer, and is a core accessory in the computer. Its functions are mainly to interpret computer instructions and to process data in computer software. The CPU is the core component of the computer responsible for reading, decoding and executing instructions. The central processor mainly comprises two parts, namely a controller and an arithmetic unit, and also comprises a cache memory and a bus for realizing data and control of the connection between the cache memory and the arithmetic unit. The three major core components of the computer are the CPU, internal memory, and input/output devices. The central processing unit mainly has the functions of processing instructions, executing operations, controlling time and processing data.
There are many reasons for ignition and burning during charging, but the following are most likely to occur in the charging market: first, the internal short circuit of the charging plug of the electric car causes the circuit to be connected in series. Secondly, the input voltage of the charger exceeds the rated input voltage standard to cause the transformer coil to be burnt. Thirdly, the charging time is too long, which causes serious heating and high temperature fire. These several situations are summarized as the power supply acting as a direct power supply, and the anticipation of the occurrence of overcurrent and charging is insufficient. Therefore, the present invention provides a short circuit control method and a control system for a silicon carbide charging power supply, so as to solve the above problems.
Fig. 1 is a schematic flow chart illustrating a short-circuit control method for a silicon carbide charging power supply according to an embodiment of the present invention; fig. 2 is a schematic structural diagram of a short-circuit protection system of a silicon carbide charging power supply according to another embodiment of the present invention; fig. 3 is a schematic diagram of a short-circuit protection device of a silicon carbide charging power supply according to another embodiment of the present invention; fig. 4 is a schematic diagram of another short-circuit protection control device for a silicon carbide charging power supply according to another embodiment of the present invention. The short circuit control method and the control system for the silicon carbide charging power supply according to the embodiment of the present invention will be described in detail below with reference to fig. 1 to 4.
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
An embodiment of the present invention provides a short-circuit control method for a silicon carbide charging power supply, which is applied to a short-circuit protection system for the silicon carbide charging power supply, and an execution main body of the short-circuit control method for the silicon carbide charging power supply is a CPU control module in the short-circuit protection system for the silicon carbide charging power supply, as shown in fig. 1, a schematic flow diagram of the short-circuit control method for the silicon carbide charging power supply is provided, and the steps included in the method are specifically described below with reference to fig. 1.
And S101, acquiring a current charging voltage value acquired by the charging detection module.
Specifically, the charging detection module may include a current transformer and an operational amplifier, the current transformer may collect a current charging current value of the silicon carbide charging power supply in real time or periodically, the operational amplifier may convert the current charging current value into a small current signal, and then perform voltage signal conversion processing on the small current signal to obtain a current charging voltage value, and then may send the current charging voltage value to the CPU control module.
And step S102, determining a target level matched with the current charging voltage value.
In the actual processing process, when the CPU control module acquires the current charging voltage value acquired by the charging detection module, the target level matched with the current charging voltage value may be determined through the following substeps.
And S1021, comparing the current charging voltage value with a preset overvoltage point voltage to obtain a comparison result.
The preset overvoltage point voltage can be used for representing that the voltage value of the silicon carbide charging power supply is enough to indicate that no short circuit abnormality occurs in an ammeter or a processor, and can be a preset overvoltage point voltage threshold or a preset overvoltage point voltage range.
Specifically, when the CPU control module obtains the current charging voltage, the current charging voltage value may be compared with a preset overvoltage point voltage, for example, the current charging voltage value is compared with a preset overvoltage point voltage threshold, or the current charging voltage value is compared with a maximum value and a minimum value of a preset overvoltage point voltage range, so as to obtain a comparison result.
Step S1022, a target level corresponding to the magnitude comparison result is determined.
In the actual processing process, the target level determined by the CPU control module according to the size comparison module comprises the following conditions:
and step S11, if the comparison result shows that the current charging voltage value is lower than the preset overvoltage point voltage, determining that the target level is a high level.
Specifically, when the CPU control module determines that the magnitude comparison result indicates that the current charging voltage value is lower than the preset overvoltage point voltage threshold, or indicates that the current charging voltage value is within the minimum value and the maximum value of the preset overvoltage point voltage range, it determines that the target level is the high level.
And step S12, if the comparison result indicates that the current charging voltage value is higher than the preset overvoltage point voltage, determining that the target level is a low level.
Specifically, when the CPU control module determines that the magnitude comparison result indicates that the current charging voltage value is higher than the preset overvoltage point voltage threshold, or indicates that the current charging voltage value is not within the minimum value and the maximum value of the preset overvoltage point voltage range, it determines that the target level is the low level.
And S103, controlling the silicon controlled rectifier module to execute corresponding target processing according to the target level.
In the actual processing process, the CPU control module controls the silicon controlled rectifier module to execute the corresponding target processing according to the target level, which may include the following cases:
and step S1031, when the target level is a high level, controlling the silicon controlled module to execute a closing operation, so that the silicon carbide charging power supply normally works.
Specifically, when the CPU control module determines that the target level is a high level, it may be considered that the current ammeter or processor is not in short circuit abnormality, and at this time, the silicon controlled module may be controlled to continue to perform the closing operation, so that the silicon carbide charging power supply operates normally.
And S1032, when the target level is a low level, controlling the silicon controlled rectifier module to execute a disconnection operation, so that the silicon carbide charging power supply is powered off.
Specifically, when the CPU control module determines that the target level is the low level, it may be considered that a short circuit abnormality occurs in the current ammeter or the processor, and at this time, the silicon controlled module may be controlled to immediately perform a disconnection operation, so that the silicon carbide charging power supply is powered off, thereby realizing protection of the silicon carbide charging power supply and prolonging the service life of the silicon carbide charging power supply.
In the actual processing process, the method of this embodiment further includes:
and when the target level is a low level, generating alarm information, and sending the alarm information to other external equipment connected with the silicon carbide charging power supply.
And the alarm information is used for representing the abnormity of the silicon carbide charging power supply.
Specifically, the CPU control module can generate alarm information while controlling the silicon controlled module to immediately execute disconnection operation, and can send the alarm information to other external equipment connected with the silicon carbide charging power supply through the communication module, so that the damage of the other external equipment is avoided.
In the actual processing procedure, after step S101, the method further includes:
and step S21, acquiring the target charging time corresponding to the current charging voltage value.
Specifically, when the CPU control module acquires the current charging voltage value acquired by the charging detection module, the CPU control module may further acquire a target charging time corresponding to the current charging voltage value, so as to preliminarily determine whether the short circuit abnormality occurs in the silicon carbide charging power supply according to the target charging time.
And step S22, determining the charging state of the current time according to the target charging time, the current charging voltage value and the charging state of the power supply at the last time.
In the actual processing process, the charging state determined by the CPU control module at this time may include the following cases:
step S221, if the previous power state is normal, determining the current charging state corresponding to the target charging time and the current charging voltage value.
Specifically, when the CPU control module acquires the current charging voltage value acquired by the charging detection module, the CPU control module may further acquire the previous power state, and when it is determined that the previous power state is normal, may determine the current charging state according to a ratio of the target charging time to the current charging voltage value, for example, when the ratio is close to a ratio of the normal charging time to the normal charging voltage in the previous normal power state, it may be considered that the current charging state is normal.
Step S222, if the last power state is abnormal, determining the current charging state corresponding to the current charging voltage value.
Specifically, when the current charging voltage value acquired by the charging detection module is acquired, the CPU control module may further acquire the previous power state, and when it is determined that the previous power state is abnormal, may determine the current charging state according to the current charging voltage value, for example, when the current charging voltage value is close to the abnormal charging voltage value in the previous abnormal power state, it may be determined that the current charging state is abnormal.
Optionally, when the CPU control module determines that the ratio of the target charging time to the current charging voltage value is close to the ratio of the abnormal charging time to the abnormal charging voltage in the power state that was abnormal last time, it may be determined that the current charging state is abnormal.
And step S23, sending the current charging state to the terminal equipment for display.
Specifically, when the CPU control module determines that the current charging state is abnormal, the CPU control module may store the target charging time and the current charging voltage value representing the abnormality in a Double Data Rate (DDR) memory, transmit the target charging time and the current charging voltage value to the terminal device, and monitor and display the vehicle state in real time through the human-computer interaction interface.
Similarly, when the CPU control module determines that the charging state is normal, the target charging time and the current charging voltage value which represent normal can be stored in the DDR memory and transmitted to the terminal equipment, and the vehicle state is monitored and displayed in real time through the human-computer interaction interface.
The short circuit control method of the silicon carbide charging power supply provided by the embodiment of the invention comprises the following steps: acquiring a current charging voltage value acquired by a charging detection module; determining a target level matching the current charging voltage value; and controlling the silicon controlled module to execute corresponding target processing according to the target level. That is to say, the target level matched with the current charging voltage value is determined according to the current charging voltage value acquired by the charging detection module acquired in real time, and the silicon controlled module is controlled to be switched on or switched off according to the target level, so that the purpose of power failure by switching off or switching off the silicon carbide module when abnormality is detected is rapidly and effectively achieved, the purpose of tens of times higher switching-off speed than that of a mechanical short-circuiting device is achieved, the switching speed is high, the conduction loss is small, and the abnormality judgment speed and the service life of the charging power supply are greatly improved.
In another possible embodiment, the present invention further provides a short-circuit protection system for a silicon carbide charging power supply, as shown in fig. 2, the system comprising: charge detection module, CPU control module, silicon controlled rectifier module, CPU control module respectively with charge detection module with silicon controlled rectifier module electric connection, wherein:
the charging detection module is used for acquiring the current charging current value, converting the current charging current value into a small current signal, and then performing voltage signal conversion processing on the small current signal to obtain the current charging voltage value.
And the CPU control module is used for acquiring the current charging voltage value acquired by the charging detection module, determining a target level matched with the current charging voltage value, and then controlling the silicon controlled module to execute corresponding target processing according to the target level.
And the silicon controlled module is used for executing the target processing instruction issued by the CPU control module.
Specifically, the charging detection module may include a current transformer and an operational amplifier, the current transformer may collect a current charging current value of the silicon carbide charging power supply in real time or periodically, the operational amplifier may convert the current charging current value into a small current signal, and then perform voltage signal conversion processing on the small current signal to obtain a current charging voltage value.
Optionally, a voltage comparator may be further disposed in the operational amplifier to implement comparison of voltages in the circuit.
Optionally, the CPU control module may be a single chip microcomputer, which prevents the device or the system from being disordered during the working process, and may effectively improve the detection accuracy.
Optionally, the thyristor module can adopt a double-circuit thyristor, so that front and back graded disconnection is realized.
Optionally, the current transformer may be a current transformer dedicated to a high-precision instrument, and the current transformer may be arranged at the power output end for accurate detection.
Optionally, when the current charging voltage value acquired by the charging detection module is acquired, the CPU control module may further acquire the previous power state, and when it is determined that the previous power state is abnormal, may determine the current charging state according to the current charging voltage value, for example, when the current charging voltage value is close to the abnormal charging voltage value in the previous abnormal power state, it may be determined that the current charging state is abnormal.
In the embodiment of the invention, when the CPU control module determines that the ratio of the target charging time to the current charging voltage value is close to the ratio of the abnormal charging time to the abnormal charging voltage in the abnormal power state last time, the current charging state can be considered as abnormal.
When the CPU control module determines that the charging state is abnormal, the target charging time and the current charging voltage value representing the abnormality can be stored in the DDR memory and transmitted to the terminal equipment, and the vehicle state is monitored and displayed in real time through the human-computer interaction interface.
Similarly, when the CPU control module determines that the charging state is normal, the target charging time and the current charging voltage value which represent normal can be stored in the DDR memory and transmitted to the terminal equipment, and the vehicle state is monitored and displayed in real time through the human-computer interaction interface.
Optionally, the DDR memory may store each charge output and analyze the anomalies for display on the display.
Optionally, the CPU control module may be configured to analyze and determine an abnormality in real time according to the current charging voltage value collected by the charging detection module.
It should be noted that, for the descriptions of the same steps and the same contents in this embodiment as those in other embodiments, reference may be made to the descriptions in other embodiments, which are not described herein again.
The charging detection module, the CPU control module and the silicon controlled module provided by the embodiment of the invention are respectively and electrically connected with the charging detection module and the silicon controlled module, wherein: the charging detection module is used for acquiring a current charging current value, converting the current charging current value into a small current signal, and then performing voltage signal conversion processing on the small current signal to obtain a current charging voltage value; the CPU control module is used for acquiring the current charging voltage value acquired by the charging detection module, determining a target level matched with the current charging voltage value, and then controlling the silicon controlled module to execute corresponding target processing according to the target level; and the silicon controlled module is used for executing the target processing instruction issued by the CPU control module. That is to say, the target level matched with the current charging voltage value is determined according to the current charging voltage value acquired by the charging detection module acquired in real time, and the silicon controlled module is controlled to be switched on or switched off according to the target level, so that the purpose of power failure by switching off or switching off the silicon carbide module when abnormality is detected is rapidly and effectively achieved, the purpose of tens of times higher switching-off speed than that of a mechanical short-circuiting device is achieved, the switching speed is high, the conduction loss is small, and the abnormality judgment speed and the service life of the charging power supply are greatly improved.
Fig. 3 is a schematic diagram of a short-circuit protection device of a silicon carbide charging power supply according to another embodiment of the present invention, where the short-circuit protection device of the silicon carbide charging power supply includes: an obtaining module 301, a determining module 302 and a controlling module 303, wherein:
the obtaining module 301 is configured to obtain a current charging voltage value collected by the charging detection module.
A determining module 302, configured to determine a target level matching the current charging voltage value.
And the control module 303 is configured to control the silicon controlled rectifier module to execute corresponding target processing according to the target level.
It should be noted that, for the descriptions of the same steps and the same contents in this embodiment as those in other embodiments, reference may be made to the descriptions in other embodiments, which are not described herein again.
In an embodiment of the present invention, a short-circuit protection device for a silicon carbide charging power supply includes: the device comprises an acquisition module, a determination module and a control module, wherein: the acquisition module is used for acquiring the current charging voltage value acquired by the charging detection module; the determining module is used for determining a target level matched with the current charging voltage value; and the control module is used for controlling the silicon controlled module to execute corresponding target processing according to the target level: that is to say, the target level matched with the current charging voltage value is determined according to the current charging voltage value acquired by the charging detection module acquired in real time, and the silicon controlled module is controlled to be switched on or switched off according to the target level, so that the purpose of power failure by switching off or switching off the silicon carbide module when abnormality is detected is rapidly and effectively achieved, the purpose of tens of times higher switching-off speed than that of a mechanical short-circuiting device is achieved, the switching speed is high, the conduction loss is small, and the abnormality judgment speed and the service life of the charging power supply are greatly improved.
Fig. 4 is a schematic diagram of another short-circuit protection control apparatus for a silicon carbide charging power supply according to another embodiment of the present invention, as shown in fig. 4, the apparatus may be integrated in a terminal device or a chip of the terminal device.
The device includes: memory 401, processor 402.
The memory 401 is used for storing programs, and the processor 402 calls the programs stored in the memory 401 to execute the above-mentioned method embodiments. The specific implementation and technical effects are similar, and are not described herein again.
Preferably, the invention also provides a program product, such as a computer-readable storage medium, comprising a program which, when being executed by a processor, is adapted to carry out the above-mentioned method embodiments.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: a U disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
It should be noted that the embodiments of the present invention can be realized by hardware, software, or a combination of software and hardware. The hardware portion may be implemented using dedicated logic; the software portions may be stored in a memory and executed by a suitable instruction execution system, such as a microprocessor or specially designed hardware. Those skilled in the art will appreciate that the apparatus and methods described above may be implemented using computer executable instructions and/or embodied in processor control code, such code being provided on a carrier medium such as a disk, CD-or DVD-ROM, programmable memory such as read only memory (firmware), or a data carrier such as an optical or electronic signal carrier, for example. The apparatus and its modules of the present invention may be implemented by hardware circuits such as very large scale integrated circuits or gate arrays, semiconductors such as logic chips, transistors, or programmable hardware devices such as field programmable gate arrays, programmable logic devices, etc., or by software executed by various types of processors, or by a combination of hardware circuits and software, e.g., firmware.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A short circuit control method of a silicon carbide charging power supply, characterized by comprising:
acquiring a current charging voltage value acquired by a charging detection module;
determining a target level matching the current charging voltage value;
and controlling the silicon controlled module to execute corresponding target processing according to the target level.
2. The method of short-circuit control of a silicon carbide charging source of claim 1, wherein determining a target level that matches a current charging voltage value comprises:
comparing the current charging voltage value with a preset overvoltage point voltage to obtain a comparison result;
a target level corresponding to the magnitude comparison is determined.
3. The method of short-circuiting control of a silicon carbide charging source according to claim 2, wherein said determining a target level corresponding to the result of the magnitude comparison includes:
if the magnitude comparison result represents that the current charging voltage value is lower than the preset overvoltage point voltage, determining that the target level is a high level;
if the magnitude comparison result represents that the current charging voltage value is higher than the preset overvoltage point voltage, determining that the target level is a low level;
controlling the silicon controlled module to execute corresponding target processing according to the target level, wherein the target processing comprises the following steps:
when the target level is a high level, controlling the silicon controlled module to execute a closing operation, so that the silicon carbide charging power supply works normally;
when the target level is a low level, controlling the silicon controlled module to execute a disconnection operation, so that the silicon carbide charging power supply is powered off;
further comprising:
when the target level is low level, generating alarm information, and sending the alarm information to other external equipment connected with the silicon carbide charging power supply;
wherein, alarm information is used for the carborundum charging source of sign unusual.
4. The method for short-circuit control of a silicon carbide charging source as claimed in claim 1, wherein after the step of obtaining a current charging voltage value collected by a current transformer, the method further comprises:
acquiring target charging time corresponding to the current charging voltage value;
determining the charging state of the current time according to the target charging time, the current charging voltage value and the last power supply charging state;
and sending the charging state to the terminal equipment for displaying.
5. The method of claim 4, wherein determining the present charging state based on the target charging time, the current charging voltage value, and the last charging state of the power supply comprises:
if the last power supply state is normal, determining the current charging state corresponding to the target charging time and the current charging voltage value;
and if the last power supply state is abnormal, determining the current charging state corresponding to the current charging voltage value.
6. A computer-readable storage medium storing a computer program which, when executed by a processor, causes the processor to perform the steps of:
acquiring a current charging voltage value acquired by a charging detection module;
determining a target level matching the current charging voltage value;
and controlling the silicon controlled module to execute corresponding target processing according to the target level.
7. A short-circuit control system for a silicon carbide charging power supply for carrying out the short-circuit control method for the silicon carbide charging power supply according to any one of claims 1 to 5, the short-circuit control system comprising:
the charging detection module is used for acquiring a current charging current value, converting the current charging current value into a small current signal, and then performing voltage signal conversion processing on the small current signal to obtain a current charging voltage value;
the CPU control module is respectively electrically connected with the charging detection module and the silicon controlled module and is used for acquiring a current charging voltage value acquired by the charging detection module, determining a target level matched with the current charging voltage value and then controlling the silicon controlled module to execute corresponding target processing according to the target level;
and the silicon controlled module is used for executing the target processing instruction issued by the CPU control module.
8. A short-circuit protection device of a silicon carbide charging power supply operating a short-circuit control system of the silicon carbide charging power supply according to claim 7, wherein the short-circuit protection device of the silicon carbide charging power supply comprises: the device comprises an acquisition module, a determination module and a control module, wherein:
the acquisition module is used for acquiring the current charging voltage value acquired by the charging detection module;
the determining module is used for determining a target level matched with the current charging voltage value;
and the control module is used for controlling the silicon controlled module to execute corresponding target processing according to the target level.
9. A short-circuit protection control device of a silicon carbide charging power supply that operates a short-circuit control system of the silicon carbide charging power supply according to claim 7, characterized in that the control device comprises: a processor and a memory, the memory configured to store instructions, the processor configured to execute the instructions stored in the memory to cause the apparatus to perform the method of short circuit control of a silicon carbide charging power supply of any one of claims 1-5.
10. A charging pile equipped with a short-circuit control system for a silicon carbide charging power supply according to claim 7.
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Application publication date: 20210205 |