CN110824286B - Charging abnormality detection method, charging device, computer device, and storage medium - Google Patents
Charging abnormality detection method, charging device, computer device, and storage medium Download PDFInfo
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Abstract
The invention discloses a charging abnormity detection method, which comprises the following steps: receiving a charging instruction; detecting a first voltage of the charging equipment, wherein the first voltage represents a voltage value before the charging equipment starts charging, and if the charging equipment is determined to have no historical charging record, setting a first current threshold value, wherein the first current threshold value represents the maximum charging current allowed after the charging equipment starts charging; starting charging and detecting a second voltage and a first current of the charging equipment, wherein the second voltage represents a voltage value of the charging equipment after the charging equipment is started, the first current represents a current value of the charging equipment after the charging equipment is started, and the first current is smaller than a first current threshold; determining a first contact impedance according to the first voltage, the second voltage and the first current; and whether the charging equipment is abnormal or not is determined according to the first contact impedance, the method is simple, and the detection safety is high. The invention also provides a charging device, a computer device and a storage medium.
Description
Technical Field
The present invention relates to the field of charging detection, and in particular, to a charging abnormality detection method, a charging device having a charging abnormality detection function, and a computer device and a computer storage medium based on the charging abnormality detection method.
Background
With the continuous improvement of the scientific and technological level and the living standard of people, more and more people start to buy the car to promote the convenience of life, improve the quality of life. However, as the capacity of the current automobiles is continuously increased, the emission of automobile exhaust has great influence on the ecological environment. In order to improve the increasingly deteriorated ecological environment, electric vehicles are in operation, and the electric vehicles are powered by electricity
The energy is provided to drive the vehicle to run, automobile exhaust is not generated in the running process, and the energy-saving automobile tail gas generator has great effects of reducing the automobile exhaust and improving the environmental pollution.
Electric vehicles have been vigorously developed, so that the construction of charging facilities is driven, and a large amount of charging equipment enters areas such as residential areas and office buildings. Conventional charging equipment only provides basic protection measures such as overcurrent detection and overheat detection, cannot provide adaptive detection according to the running state of the charging equipment, and is low in safety.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a charging abnormity detection method which is higher in detection adaptability and safer. The invention also provides a charging device with the charging abnormity detection method, and a computer device and a storage medium based on the charging abnormity detection method.
In order to realize the purpose, the following technical scheme is adopted:
in a first aspect, a charging abnormality detection method is used for a charging device, and the method includes:
receiving a charging instruction;
detecting a first voltage of the charging device, wherein the first voltage represents a voltage value before the charging device starts charging, and if the charging device is determined to have no historical charging record, setting a first current threshold value, wherein the first current threshold value represents a maximum charging current allowed after the charging device starts charging;
starting charging and detecting a second voltage and a first current of the charging equipment, wherein the second voltage represents a voltage value of the charging equipment after being started, the first current represents a current value of the charging equipment after being started, and the first current is smaller than a first current threshold value;
determining a first contact impedance from the first voltage, the second voltage, and the first current; and the number of the first and second groups,
determining whether the charging device is abnormal according to the first contact impedance.
In a second aspect, a charging device includes:
the receiving and sending unit is used for receiving a charging instruction;
the charging device comprises a detection unit, a control unit and a control unit, wherein the detection unit is used for detecting a first voltage of the charging device, and the first voltage represents a voltage value before the charging device starts charging; if it is determined that the charging equipment does not have a historical charging record, setting a first current threshold value, wherein the first current threshold value represents the maximum charging current allowed after the charging equipment starts to charge;
the processing unit is further configured to start charging and detect a second voltage and a first current of the charging device, where the second voltage represents a voltage value of the charging device after being started, the first current represents a current value of the charging device after being started, and the first current is smaller than the first current threshold;
the processing unit is further used for determining a first contact impedance according to the first voltage, the second voltage and the first current;
the processing unit is further used for determining whether the charging equipment is abnormal or not according to the first contact impedance.
In a third aspect, a computer device comprises a processor and a memory, the processor being coupled to the memory and executing instructions when in operation to implement the charging anomaly detection method of the first aspect.
In a fourth aspect, a computer storage medium has stored thereon a computer program that is executed by a processor to implement the charging abnormality detection method of the first aspect.
The technical scheme of the invention has the following beneficial effects:
according to the charging abnormity detection method and the charging equipment, after a charging instruction is received, the current threshold value is set firstly, then charging is started, whether the charging equipment is abnormal or not can be determined by detecting the charging voltage and the charging current before and after charging is started and further determining the contact impedance during charging, and the contact impedance during charging can be judged.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope of the present invention.
Fig. 1 is a schematic circuit diagram of a charging device for charging an electric vehicle according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a charging abnormality detection method according to an embodiment of the present invention;
FIG. 3 is a flow chart illustrating a method for detecting charging anomalies according to another embodiment of the present invention;
FIG. 4 is a flow chart illustrating a method for detecting charging anomalies according to yet another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a frame of a charging device according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a frame structure of a computer device according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a frame structure of a computer-readable storage medium according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive work based on the embodiments of the present invention, are within the scope of the present invention.
In order to make the objects, technical solutions and advantageous technical effects of the present invention more clearly and completely apparent, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The embodiment of the invention provides a charging abnormity detection method which is used for charging equipment. Referring to fig. 1, the charging apparatus 100 is connected to an electric vehicle 200 to charge the electric vehicle 200. During charging, the connection between the charging device 100 and the electric vehicle 200 and the connection between the internal components of the charging device 100 form a connection impedance, and power is consumed during charging to generate heat. The charging apparatus 100 can detect the current and voltage parameters of the charging circuit at the detection point a. According to the embodiment of the invention, the detection of the running state of the charging equipment is realized by detecting the connection impedance, and adverse effects caused by the abnormality of the charging equipment are avoided.
Referring to fig. 2, the charging abnormality detection method includes:
step S10, receiving a charging instruction;
step S20, detecting a first voltage of the charging device, where the first voltage represents a voltage value before the charging device starts charging, and step S30, determining that there is no historical charging record in the charging device, setting a first current threshold, where the first current threshold represents a maximum charging current allowed after the charging device starts charging;
step S40, start charging and detect a second voltage and a first current of the charging device, where the second voltage represents a voltage value after the charging device is started, the first current represents a current value after the charging device is started, and the first current is smaller than the first current threshold;
step S50, determining a first contact impedance according to the first voltage, the second voltage and the first current; and the number of the first and second groups,
step S60, determining whether the charging device is abnormal according to the first contact impedance.
In this embodiment, the charging device 100 is connected with the charging cloud platform, and the charging cloud platform is connected with the user mobile terminal, or the charging device 100 is connected with the mobile terminal in step S10, the charging instruction is actually charged through the operation interface of the user operation charging device 100 and set up to issue the charging instruction, or the user operates the charging device 100 through the APP interface of the mobile terminal to issue the charging instruction. It is understood that in other embodiments, a sensor may be further provided in the charging device 100, and the charging instruction is configured to be received by the charging device 100 by recognizing that the electric vehicle is parked at a charging parking space or the charging device 100 senses a charging gun connection.
In step S20, the charging device 100 detects a first voltage at a detection point a before starting charging, where the first voltage is actually a voltage value in a no-connection impedance state and is a theoretical voltage value of the charging circuit. In the step S30, by determining whether there is a history of charging record in the charging apparatus 100, when there is no history of charging record in the charging apparatus 100, that is, the charging apparatus is charging for the first time, the upper limit of the output current of the charging apparatus 100 is set to the first current threshold value to limit the output current of the charging apparatus 100 for the electric vehicle 200 at the time of subsequent charging.
It is to be understood that the sequence of the step S20 and the step S30 is not limited, and the step S20 may be performed first, or the step S30 may be performed first, or both steps may be performed simultaneously.
In step S40, the charging device 100 is controlled to start charging, and a second voltage and a first current of the charging device 100 are detected at a detection point a, where the second voltage and the second current are actual voltage and current values of the charging device 100 at this time. It can be understood that, during charging, the actual output voltage of the charging device 100 is the first voltage, and after consumption of the connection impedance, the actual operating voltage drops to the second voltage. Further, in step S50, a first contact impedance, i.e., a connection impedance in a charging circuit formed by the charging device 100 and the electric vehicle 200, is determined according to the first voltage, the second voltage and the first current. When the first contact impedance is determined by calculation, whether the impedance value is in the normal range can be judged, and whether the charging device 100 is normal can be judged correspondingly.
In this embodiment, the contact impedance actually includes two parts: in practice, the charging gun has a connection lock, and the connection between the charging device 100 and the electric vehicle 200 and the connection impedance inside the charging device 100 are structurally increased, so that the connection impedance of the interface is small, and the connection impedance of the charging interface can be determined according to factory shipment of the charging device 100 manufacturer, or according to a charging voltage V pile of the charging device 100 and a charging voltage V car and a charging current I of the electric vehicle 200 during charging, where the connection impedance R interface of the interface is (V car-V pile)/I charge, and it can be understood that the power of heat generated by the connection impedance of the interface is low. Since the connection impedance inside the charging device 100 cannot be predicted when the charging device 100 is first charged after being mounted, the current threshold is set in step S30 to avoid the generation of a large amount of heat due to power consumption by the contact impedance inside the charging device 100.
In the charging abnormality detection method of the embodiment, charging is started by setting the current threshold, the contact impedance during charging is determined according to the voltage and current states before and after charging, and one-field judgment is further performed on the contact impedance to determine the state of the charging device 100, so that the situation that the charging device 100 is damaged due to a large amount of power loss generated when charging is started due to abnormal contact impedance is avoided.
Further, the step S60, determining whether the charging device is abnormal according to the first contact impedance specifically includes:
if the first contact impedance is determined to be not smaller than the preset contact impedance, determining that the charging equipment is abnormal, and generating abnormal information; or,
and determining that the first contact impedance is smaller than a preset contact impedance, and determining that the charging equipment is normal.
In this embodiment, the preset contact impedance is set according to impedance data provided by a manufacturer of the charging device 100 when the charging device is shipped, specifically, according to a contact impedance value detected when normal charging is detected before the charging device 100 is shipped. Specifically, the contact impedance of the charging device 100 during charging is reasonably in the range of 0.01 to 0.15 Ω, and the preset contact impedance may be set to 0.15 Ω, and it is understood that, further, for the charging device 100 to operate more safely and for the mounting structure of the charging device 100 to be strictly required, the preset contact impedance may be set to 0.12 Ω, 0.1 Ω, and the like. In step S60, the first contact impedance obtained by detection and determination is compared with a preset contact impedance, whether the charging device 100 is normal or not is determined according to different comparison results, and when it is determined that the charging device is abnormal, abnormal information is generated, where the abnormal information includes an alarm sound or a prompt message, and the abnormal state is prompted to a charging operator. Further, the charging operator may perform assembly structure check and adjustment on the charging device 100 according to the abnormal state, and restore the assembly structure to factory settings after performing assembly adjustment on the charging device 100, and accordingly, the charging device 100 detects that the charging device 100 does not have a historical charging record in a subsequent charging process, and performs a corresponding detection step according to the detection of the charging device 100 that the charging device 100 does not have the historical charging record.
Referring to fig. 3, further, after determining that the first contact impedance is smaller than a preset contact impedance and determining that the charging device is normal, the method further includes:
step S70, setting a second current threshold and adjusting the charging state, where the second current threshold represents a maximum charging current allowed by the charging device after adjusting the charging state, and the second current threshold is greater than the first current threshold;
step S80, detecting a third voltage and a second current of the charging device, where the third voltage represents a voltage value of the charging device after adjusting charging, the second current represents a current value of the charging device after adjusting charging, and the second current is smaller than the second current threshold;
step S90, determining a second contact impedance according to the first voltage, the third voltage and the second current; and (c) a second step of,
step S95, if it is determined that the second contact impedance is not smaller than the preset contact impedance, it is determined that the charging device is abnormal, and abnormal information is generated.
In this embodiment, on the premise that the first current threshold is set, the first contact impedance of the current charging is determined by detecting the voltage and the current before and after the charging of the charging device 100 is started, and when it is determined that the first contact impedance is in the normal state, in step S70, the charging device 100 is controlled to set the second current threshold, where the second current threshold is higher than the first current threshold. It can be understood that when the charging device 100 operates in the first current threshold state, the contact impedance of the charging device 100 satisfies the normal state, and at this time, the current threshold of the charging device 100 is adjusted to be increased to the second current threshold, and in practice, when the current threshold is increased, the output current of the charging device 100 is correspondingly increased, and the lower output current in the first current threshold state is increased to the higher output current in the second current threshold state, and by setting the first current threshold and then setting the second current threshold, the charging device 100 is prevented from directly generating larger power consumption to damage the device when being turned on. Further, after the second current threshold is set, the voltage and current conditions after the charging state adjustment are detected, the corresponding second contact impedance is determined, and then the second contact impedance is determined to determine whether the state of the charging device 100 is normal, which is the same as the aforementioned detection, determination, and determination processes for the first contact impedance, and is not described again here.
Referring to fig. 4, further, after receiving the charging command, the step S10 further includes:
the step S20 of detecting a first voltage of the charging device, and if it is determined that the charging device has a historical charging record, setting a second current threshold, where the second current threshold represents a maximum charging current allowed after the charging device starts charging, and the second current threshold is greater than the first current threshold;
step S80', start charging and detect a third voltage and a second current of the charging device, where the third voltage represents a voltage value after the charging device starts charging, the second current represents a current value after the charging device starts charging, and the second current is smaller than the second current threshold;
step S90, determining a second contact impedance according to the first voltage, the third voltage and the second current; and the number of the first and second groups,
step S95, if it is determined that the second contact impedance is not smaller than the preset contact impedance, it is determined that the charging device is abnormal, and abnormal information is generated.
In this embodiment, when the charging device 100 receives the charging instruction, the voltage data before the charging device 100 starts charging is detected, and the process is the same as the above; and, whether charging device 100 has the history record of charging is judged, when there is the history record of charging, can understand that charging device 100 charges for non-first time, and the assembly structure of charging device 100 before charging is normal, so need not set up the first current threshold and start charging, and directly set up higher second current threshold, further improved charging efficiency of charging device 100 under the prerequisite that satisfies the security. After the second current threshold is set, the voltage and current conditions after the charging state adjustment are further detected, a corresponding second contact impedance is determined, and then the second contact impedance is determined to determine whether the state of the charging device 100 is normal, which is the same as the detection, determination and determination processes of the first contact impedance, and is not repeated here.
Further, after determining a second contact impedance according to the first voltage, the third voltage, and the second current, the step 90 further includes:
determining that the second contact resistance is less than the preset contact resistance, then,
re-detecting a third voltage and a second current of the charging device;
re-determining a second contact impedance according to the first voltage, the re-detected third voltage and the re-detected second current; and the number of the first and second groups,
determining that the second contact impedance obtained through redetermination is not smaller than the preset contact impedance, determining that the charging equipment is abnormal, and generating abnormal information; or, if it is determined that the redetermined second contact impedance is smaller than the preset contact impedance, the third voltage and the second current are detected again, and the second contact impedance is determined until the charging equipment finishes charging.
In this embodiment, on the basis of the foregoing embodiment, after the second current threshold is set, the detection, determination, and abnormality determination process of the second contact impedance of the charging device 100 is a cycle detection process, and the state of the charging device is detected all the time during the charging process of the charging device 100, it is understood that the cycle may also be set to be a periodic cycle, for example, once every 10s of cycle detection until the charging process of the charging device 100 being the electric vehicle 200 is completed, and the detection cycle is stopped. The detection process in each cycle is the same as that in the previous embodiment, and is not described herein again.
Further, the second contact resistance R2 is (V1-V3)/I2, where V1 represents a first voltage, V3 represents a third voltage, and I2 represents a second current.
Further, the first contact resistance R1 is (V1-V2)/I1, where V1 represents a first voltage, V2 represents a second voltage, and I1 represents a first current.
Referring to fig. 5, an embodiment of the invention further provides a charging apparatus 100, including:
a transceiver unit 10, configured to receive a charging instruction;
a processing unit 20, configured to detect a first voltage of the charging apparatus 100, where the first voltage represents a voltage value before the charging apparatus 100 starts charging, and set a first current threshold value if it is determined that the charging apparatus 100 has no historical charging record, where the first current threshold value represents a maximum charging current allowed after the charging apparatus 100 starts charging;
the processing unit 20 is further configured to start charging and detect a second voltage and a first current of the charging device 100, where the second voltage represents a voltage value of the charging device 100 after being started, the first current represents a current value of the charging device 100 after being started, and the first current is smaller than the first current threshold;
the processing unit 20 is further configured to determine a first contact impedance according to the first voltage, the second voltage and the first current;
the processing unit 20 is further configured to determine whether the charging device 100 is abnormal according to the first contact impedance.
In this embodiment, the transceiver unit 10 of the charging device 100 is connected to the charging cloud platform, and the charging cloud platform is connected to the mobile terminal of the user, or the transceiver unit 10 of the charging device 100 is connected to the mobile terminal in step S10, the charging instruction is actually set by charging through the operation interface of the user operating the charging device 100 to issue the charging instruction, or the user operates the charging device 100 through the APP interface of the mobile terminal to issue the charging instruction. It is understood that in other embodiments, a sensor may be further provided in the charging device 100, and the charging instruction is configured to be received by the charging device 100 by recognizing that the electric vehicle is parked at a charging parking space or the charging device 100 senses a charging gun connection.
The charging device 100 detects a first voltage at a detection point a before starting charging, where the first voltage is actually a voltage value in a no-connection impedance state and is a theoretical voltage value of the charging circuit. By determining whether there is a history of charging history in the charging apparatus 100, when there is no history of charging history in the charging apparatus 100, that is, when the charging apparatus is charging for the first time, the upper limit of the output current of the charging apparatus 100 is set to the first current threshold value, so as to limit the output current of the charging apparatus 100 for the electric vehicle 200 at the time of subsequent charging.
And controlling the charging equipment 100 to start charging, and detecting a second voltage and a first current of the charging equipment 100 at a detection point A, wherein the second voltage and the second current are actual voltage values and current values of the charging equipment 100 at the moment. It can be understood that, during charging, the actual output voltage of the charging device 100 is the first voltage, and after consumption of the connection impedance, the actual operating voltage drops to the second voltage. Further, a first contact impedance, i.e., a connection impedance in a charging circuit formed by the charging device 100 and the electric vehicle 200, is calculated and determined according to the first voltage, the second voltage, and the first current. When the first contact impedance is determined by calculation, whether the impedance value of the first contact impedance is in a normal range can be judged, and whether the charging device 100 is normal can be judged correspondingly.
In this embodiment, the contact impedance actually includes two parts: in practice, the charging gun has a connection lock, and the connection between the charging device 100 and the electric vehicle 200 is structurally increased to make the connection impedance of the interface smaller, and the connection impedance of the charging interface can be determined according to the factory shipment of the manufacturer of the charging device 100, or according to the charging voltage V pile of the charging device 100, the charging voltage V car of the electric vehicle 200, and the charging current I charge, where the connection impedance R interface of the interface is (V car-V pile)/I charge, and it can be understood that the power of heat generated by the connection impedance of the interface is lower. As for the connection impedance inside the charging device 100, the magnitude of the connection impedance cannot be predicted when the charging device 100 is first charged after being installed, and therefore, a current threshold is set to avoid the generation of a large amount of heat due to power consumption by the contact impedance inside the charging device 100.
The charging device 100 of the embodiment starts charging by setting the current threshold, determines the contact impedance during charging according to the voltage and current states before and after charging, and further determines the state of the charging device 100 by performing one-field judgment on the contact impedance, thereby avoiding the situation that the charging device 100 is damaged due to a large amount of power loss generated when charging is started due to abnormal contact impedance.
Further, the processing unit 20 is specifically configured to:
determining that the first contact impedance is not smaller than a preset contact impedance, determining that the charging device 100 is abnormal, and generating abnormal information; or,
determining that the first contact impedance is smaller than a preset contact impedance, determining that the charging device 100 is normal.
In this embodiment, the preset contact impedance is set according to impedance data provided by a manufacturer of the charging device 100 when the charging device is shipped, specifically, according to a contact impedance value detected when normal charging is detected before the charging device 100 is shipped. Specifically, the contact impedance of the charging device 100 during charging is reasonably in the range of 0.01 to 0.15 Ω, and the preset contact impedance may be set to 0.15 Ω, and it is understood that, further, for the charging device 100 to operate more safely and for the mounting structure of the charging device 100 to be strictly required, the preset contact impedance may be set to 0.12 Ω, 0.1 Ω, and the like. In step S60, the first contact impedance obtained by detection and determination is compared with a preset contact impedance, whether the charging device 100 is normal or not is determined according to different comparison results, and when it is determined that the charging device is abnormal, abnormal information is generated, where the abnormal information includes an alarm sound or a prompt message, and the abnormal state is prompted to a charging operator.
Further, the processing unit 20 is further configured to:
setting a second current threshold value and adjusting the charging state, wherein the second current threshold value represents the maximum charging current allowed by the charging device 100 after adjusting the charging state, and the second current threshold value is larger than the first current threshold value;
detecting a third voltage and a second current of the charging device 100, where the third voltage represents a voltage value of the charging device 100 after adjusting charging, the second current represents a current value of the charging device 100 after adjusting charging, and the second current is smaller than the second current threshold;
determining a second contact impedance from the first voltage, the third voltage, and the second current; and the number of the first and second groups,
and if the second contact impedance is determined to be not smaller than the preset contact impedance, determining that the charging device 100 is abnormal, and generating abnormal information.
In this embodiment, on the premise of setting the first current threshold, the first contact impedance currently charged is determined by detecting the voltage and the current before and after the charging device 100 starts charging, and when it is determined that the first contact impedance is in a normal state, the charging device 100 is controlled to set the second current threshold, where the second current threshold is higher than the first current threshold. It can be understood that when the charging device 100 operates in the first current threshold state, the contact impedance of the charging device 100 satisfies the normal state, and at this time, the current threshold of the charging device 100 is adjusted to be increased to the second current threshold, and in practice, when the current threshold is increased, the output current of the charging device 100 is correspondingly increased, and the lower output current in the first current threshold state is increased to the higher output current in the second current threshold state, and by setting the first current threshold and then setting the second current threshold, the charging device 100 is prevented from directly generating larger power consumption to damage the device when being turned on. Further, after the second current threshold is set, the voltage and current conditions after the charging state adjustment are detected, the corresponding second contact impedance is determined, and then the second contact impedance is determined to determine whether the state of the charging device 100 is normal, which is the same as the aforementioned detection, determination, and determination processes for the first contact impedance, and is not described again here.
Further, the processing unit 20 is further configured to:
detecting a first voltage of the charging device 100, and if it is determined that the charging device 100 has a historical charging record, setting a second current threshold, wherein the second current threshold represents a maximum charging current allowed after the charging device 100 starts charging, and the second current threshold is greater than the first current threshold;
starting charging and detecting a third voltage and a second current of the charging device 100, where the third voltage represents a voltage value of the charging device 100 after starting charging, the second current represents a current value of the charging device 100 after starting charging, and the second current is smaller than the second current threshold;
determining a second contact impedance from the first voltage, the third voltage, and the second current; and the number of the first and second groups,
if it is determined that the second contact impedance is not less than the preset contact impedance, it is determined that the charging device 100 is abnormal, and abnormal information is generated.
In this embodiment, when the charging device 100 receives the charging instruction, the voltage data before the charging device 100 starts charging is detected, and this process is the same as the above process; and, whether charging device 100 has the history record of charging is judged, when there is the history record of charging, can understand that charging device 100 charges for non-first time, and the assembly structure of charging device 100 before charging is normal, so need not set up the first current threshold and start charging, and directly set up higher second current threshold, further improved charging efficiency of charging device 100 under the prerequisite that satisfies the security. After the second current threshold is set, the voltage and current conditions after the charging state adjustment are further detected, a corresponding second contact impedance is determined, and then the second contact impedance is determined to determine whether the state of the charging device 100 is normal, which is the same as the detection, determination and determination processes of the first contact impedance, and is not repeated here.
Further, the processing unit 20 is further configured to:
determining that the second contact resistance is less than the preset contact resistance, then,
re-detecting the third voltage and the second current of the charging apparatus 100;
re-determining a second contact impedance according to the first voltage, the re-detected third voltage and the re-detected second current; and the number of the first and second groups,
determining that the second contact impedance obtained by redetermination is not smaller than the preset contact impedance, determining that the charging device 100 is abnormal, and generating abnormal information; or, if it is determined that the second contact impedance obtained by redetermination is smaller than the preset contact impedance, the third voltage and the second current are detected again, and the second contact impedance is determined until the charging device 100 completes charging.
In this embodiment, on the basis of the foregoing embodiment, after the second current threshold is set, the detection, determination, and abnormality determination process of the second contact impedance of the charging device 100 is a cycle detection process, and the state of the charging device is detected all the time during the charging process of the charging device 100, it is understood that the cycle may also be set to be a periodic cycle, for example, once every 10s of cycle detection until the charging process of the charging device 100 being the electric vehicle 200 is completed, and the detection cycle is stopped. The detection process in each cycle is the same as that in the previous embodiment, and is not described herein again.
Further, the second contact resistance R2 is (V1-V3)/I2, where V1 represents a first voltage, V3 represents a third voltage, and I2 represents a second current.
Further, the first contact resistance R1 is (V1-V2)/I1, where V1 represents a first voltage, V2 represents a second voltage, and I1 represents a first current.
According to the charging abnormity detection method and the charging equipment, after a charging instruction is received, the current threshold value is set firstly, then charging is started, whether the charging equipment is abnormal or not can be determined by detecting the charging voltage and the charging current before and after charging is started and further determining the contact impedance during charging and judging the contact impedance during charging, and due to the fact that the current threshold value is set before charging, even if the contact impedance is abnormal in the charging process, the charging equipment can be prevented from being directly damaged, the charging detection adaptability is higher, and the safety is improved.
In addition, referring to fig. 6, an embodiment of the invention further provides a computer 300, including: a memory 310 for storing a computer program 320; and a processor 330 for executing the computer program to complete the charging abnormality detection method. The computer 300 may be a charging device.
Referring to fig. 7, an embodiment of the invention further provides a computer storage medium 400 for storing a computer program 410, wherein the computer program 410 implements the charging abnormality detection method described above when executed.
The computer readable storage medium may be an internal storage device of the aforementioned computer device. The computer readable storage medium may also be an external storage device, such as a smart Card (SMC) Card, a Secure Digital (SD) Card, a Flash memory Card (Flash Card), or the like, which is provided on the wireless switch. Further, the computer-readable storage medium may also include both an internal storage unit and an external storage device of the wireless switch. The computer-readable storage medium is used for storing the computer program and other programs and data required by the terminal. The computer readable storage medium may also be used to temporarily store data that has been output or is to be output. The computer program includes program instructions that, when executed by a processor, cause the processor to perform the above-described method of linked direction of visitor access to a community.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
When implemented in software and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention essentially or partially contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method 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.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (16)
1. A charging abnormality detection method for a charging apparatus, the method comprising:
receiving a charging instruction;
detecting a first voltage of the charging device, wherein the first voltage represents a voltage value before the charging device starts charging, and if the charging device is determined to have no historical charging record, setting a first current threshold value, wherein the first current threshold value represents a maximum charging current allowed after the charging device starts charging;
starting charging and detecting a second voltage and a first current of the charging equipment, wherein the second voltage represents a voltage value of the charging equipment after being started, the first current represents a current value of the charging equipment after being started, and the first current is smaller than a first current threshold value;
determining a first contact impedance from the first voltage, the second voltage, and the first current; the first contact impedance includes two parts: the connection impedance of the charging equipment and the electric automobile interface and the connection impedance of the charging equipment inside the charging equipment are installed; and the number of the first and second groups,
determining whether the charging device is abnormal according to the first contact impedance.
2. The method according to claim 1, wherein the determining whether the charging device is abnormal according to the first contact impedance specifically comprises:
if the first contact impedance is determined to be not smaller than the preset contact impedance, determining that the charging equipment is abnormal, and generating abnormal information; or,
and determining that the first contact impedance is smaller than a preset contact impedance, and determining that the charging equipment is normal.
3. The method of claim 2, wherein after determining that the charging device is normal if the first contact impedance is less than a preset contact impedance, further comprising:
setting a second current threshold value and adjusting the charging state, wherein the second current threshold value represents the maximum charging current allowed by the charging equipment after the charging state is adjusted, and the second current threshold value is larger than the first current threshold value;
detecting a third voltage and a second current of the charging device, wherein the third voltage represents a voltage value of the charging device after charging adjustment, the second current represents a current value of the charging device after charging adjustment, and the second current is smaller than the second current threshold;
determining a second contact impedance from the first voltage, the third voltage, and the second current; and the number of the first and second groups,
and if the second contact impedance is determined to be not smaller than the preset contact impedance, determining that the charging equipment is abnormal, and generating abnormal information.
4. The method of claim 1, wherein after receiving the charging instruction, further comprising:
detecting a first voltage of the charging equipment, and if determining that the charging equipment has a historical charging record, setting a second current threshold value, wherein the second current threshold value represents the maximum charging current allowed after the charging equipment starts charging, and the second current threshold value is larger than the first current threshold value;
starting charging and detecting a third voltage and a second current of the charging equipment, wherein the third voltage represents a voltage value of the charging equipment after starting charging, the second current represents a current value of the charging equipment after starting charging, and the second current is smaller than a second current threshold;
determining a second contact impedance from the first voltage, the third voltage, and the second current; and the number of the first and second groups,
and if the second contact impedance is determined to be not smaller than the preset contact impedance, determining that the charging equipment is abnormal, and generating abnormal information.
5. The method of claim 3 or 4, wherein after determining a second contact impedance based on the first voltage, the third voltage, and the second current, further comprising:
determining that the second contact resistance is less than the preset contact resistance,
re-detecting a third voltage and a second current of the charging device;
re-determining a second contact impedance according to the first voltage, the re-detected third voltage and the re-detected second current; and the number of the first and second groups,
if the second contact impedance obtained through redetermination is not smaller than the preset contact impedance, determining that the charging equipment is abnormal, and generating abnormal information; or, if it is determined that the second contact impedance obtained by redetermining is smaller than the preset contact impedance, the third voltage and the second current are detected again, and the action of determining the second contact impedance is carried out again until the charging equipment finishes charging.
6. Method according to claim 3 or 4, characterized in that the second contact resistance R2＝(V1-V3)/I2Wherein, the V1Represents a first voltage, said V3Represents a third voltage, said I2Representing a second current.
7. The charging abnormality detection method according to claim 1, characterized in that the first contact resistance R1＝(V1-V2)/I 1Wherein, the V1Represents a first voltage, said V2Represents a second voltage, said I1Representing a first current.
8. A charging device, comprising:
the receiving and sending unit is used for receiving a charging instruction;
the processing unit is used for detecting a first voltage of the charging equipment, wherein the first voltage represents a voltage value before the charging equipment starts charging; if it is determined that the charging equipment does not have a historical charging record, setting a first current threshold value, wherein the first current threshold value represents the maximum charging current allowed after the charging equipment starts to charge;
the processing unit is further configured to start charging and detect a second voltage and a first current of the charging device, where the second voltage represents a voltage value of the charging device after being started, the first current represents a current value of the charging device after being started, and the first current is smaller than the first current threshold;
the processing unit is further used for determining a first contact impedance according to the first voltage, the second voltage and the first current; the first contact impedance includes two parts: the connection impedance of the charging equipment and the electric automobile interface and the connection impedance of the charging equipment installation interior;
the processing unit is further used for determining whether the charging equipment is abnormal or not according to the first contact impedance.
9. The charging device according to claim 8, wherein the processing unit is specifically configured to:
if the first contact impedance is determined to be not smaller than the preset contact impedance, determining that the charging equipment is abnormal, and generating abnormal information; or,
and determining that the first contact impedance is smaller than a preset contact impedance, and determining that the charging equipment is normal.
10. The charging device of claim 9, wherein the processing unit is further configured to:
if the first contact impedance is determined to be smaller than the preset contact impedance, after the charging equipment is determined to be normal, setting a second current threshold value and adjusting the charging state, wherein the second current threshold value represents the maximum charging current allowed by the charging equipment after the charging state is adjusted, and the second current threshold value is larger than the first current threshold value;
detecting a third voltage and a second current of the charging device, wherein the third voltage represents a voltage value of the charging device after charging adjustment, the second current represents a current value of the charging device after charging adjustment, and the second current is smaller than the second current threshold;
determining a second contact impedance from the first voltage, the third voltage, and the second current; and (c) a second step of,
and if the second contact impedance is determined to be not smaller than the preset contact impedance, determining that the charging equipment is abnormal, and generating abnormal information.
11. The charging device of claim 8, wherein the processing unit is further configured to:
detecting a first voltage of the charging device; if it is determined that the charging equipment has a historical charging record, setting a second current threshold value, wherein the second current threshold value represents the maximum charging current allowed after the charging equipment starts charging, and is greater than the first current threshold value;
starting charging and detecting a third voltage and a second current of the charging equipment, wherein the third voltage represents a voltage value of the charging equipment after starting charging, the second current represents a current value of the charging equipment after starting charging, and the second current is smaller than a second current threshold;
determining a second contact impedance from the first voltage, the third voltage, and the second current; and the number of the first and second groups,
and if the second contact impedance is determined to be not smaller than the preset contact impedance, determining that the charging equipment is abnormal, and generating abnormal information.
12. The charging apparatus according to claim 10 or 11, wherein the processing unit is further configured to:
determining that the second contact resistance is less than the preset contact resistance,
re-detecting a third voltage and a second current of the charging device;
re-determining a second contact impedance according to the first voltage, the re-detected third voltage and the re-detected second current; and the number of the first and second groups,
determining that the second contact impedance obtained through redetermination is not smaller than the preset contact impedance, determining that the charging equipment is abnormal, and generating abnormal information; or, if it is determined that the second contact impedance obtained by redetermining is smaller than the preset contact impedance, the third voltage and the second current are detected again, and the action of determining the second contact impedance is carried out again until the charging equipment finishes charging.
13. Charging device according to claim 10 or 11, characterized in that the second contact resistance R is2＝(V1-V3)/I2Wherein, the V1Represents a first voltage, said V3Represents a third voltage, said I2Representing a second current.
14. Charging device according to claim 8, characterized in that the first contact resistance R1＝(V1-V2)/I 1Wherein, the V1Represents a first voltage, said V2Represents a second voltage, said I1Representing a first current.
15. A computer device, comprising a processor and a memory, wherein the processor is coupled to the memory, and the processor executes instructions to implement the charging anomaly detection method according to any one of claims 1-7 when in operation.
16. A computer storage medium having a computer program stored thereon, the computer program being executed by a processor to implement the charging abnormality detection method according to any one of claims 1 to 7.
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