CN114865901B - Control method, device and medium for starting inverter - Google Patents
Control method, device and medium for starting inverter Download PDFInfo
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- CN114865901B CN114865901B CN202210446474.3A CN202210446474A CN114865901B CN 114865901 B CN114865901 B CN 114865901B CN 202210446474 A CN202210446474 A CN 202210446474A CN 114865901 B CN114865901 B CN 114865901B
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- 238000000034 method Methods 0.000 title claims abstract description 63
- 239000003990 capacitor Substances 0.000 claims abstract description 118
- 238000012544 monitoring process Methods 0.000 claims abstract description 40
- 238000004590 computer program Methods 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 4
- 230000002596 correlated effect Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 6
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- 230000001960 triggered effect Effects 0.000 description 4
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- 230000000875 corresponding effect Effects 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/36—Means for starting or stopping converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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Abstract
The application discloses a control method, a control device and a control medium for starting an inverter, which are applied to the field of circuits. According to the method, short circuit monitoring is conducted on a circuit between the battery and the first capacitor through the BMS, and if the current in the circuit of the battery is monitored to be larger than a first threshold value, a short circuit protection circuit is started. Closing the short-circuit protection circuit after a first preset time period from starting the short-circuit protection circuit, and starting the short-circuit protection circuit if the current in the circuit of the battery monitored in a second preset time period after closing the short-circuit protection circuit is greater than a second threshold value; the second preset duration is smaller than the duration of starting the inverter. And if the current in the circuit in which the battery is not monitored in the second preset time period after the short-circuit protection circuit is closed is greater than a second threshold value, shielding the short-circuit monitoring. The method provided by the application can determine whether the circuit is really short-circuited, and can normally start the inverter on the premise of ensuring the safety of the circuit.
Description
Technical Field
The present application relates to the field of circuits, and in particular, to a method and apparatus for controlling a start-up inverter, and a medium.
Background
The inverter is an important electrical device in the field of household energy storage application, and can invert a direct-current power supply such as a battery into an alternating-current power supply so as to be used for various household appliances needing the alternating-current power supply. The circuit design of the inverter is usually additionally provided with a large-capacity electrolytic capacitor, which can be used for changing the phase difference of voltage and current and improving the output quality of electric energy, and meanwhile, the capacitors can also store a small amount of electric energy in a short time so as to be used as a starting power supply of an electronic circuit in the inverter to realize the smooth starting of the inverter, so that the large-capacity capacitor on the inverter circuit plays a very important role in the normal operation of the inverter. Fig. 1 is a schematic diagram of a connection circuit structure between a battery and a capacitor, as shown in fig. 1, a circuit in which a battery DC is directly connected with a capacitor C0 is a main circuit (a switch S1 is closed, a switch S2 is opened), a circuit in which the battery DC is connected with the capacitor C0 through a resistor R is a pre-charge circuit (the switch S1 is opened, the switch S2 is closed), the main circuit and the pre-charge circuit can be switched, and the capacitor C0 is used as a starting power supply of an electronic circuit in an inverter. In general, the control main circuit is turned on to supply a sufficient voltage to the capacitor C0, and a large charging current is generated at the instant when the battery DC is connected to the capacitor C0 due to the rapid charging characteristic of the capacitor C0. A typical battery cannot withstand this brief, large discharge current. After the battery management system (Battery Management System, BMS) detects a current greater than a threshold, the circuit is switched to a pre-charge loop to protect the circuit. But when the electronic circuitry inside the inverter consumes the energy stored by the capacitor, it is necessary to switch back to the main loop again to provide sufficient voltage. At present, it is generally set that after a preset period of time from the first detection of a short circuit, the slave pre-charge circuit switches back to the main circuit again, and no solution is provided for the subsequent case where a current greater than the threshold value is detected again.
After the secondary pre-charging circuit is switched back to the main circuit again, the charging between the battery and the capacitor is triggered again, and a short-time heavy current is generated again; at the moment, the circuit is not required to be protected and is normally charged. And the BMS cannot distinguish whether the large current is caused by the charging between the battery and the capacitor or the large current is caused by the actual occurrence of the short circuit in the circuit. If the BMS starts short-circuit protection under all conditions, the inverter cannot be started normally; and the BMS does not activate short-circuit protection in all cases, which may lead to circuit failure.
Therefore, how to normally start the inverter under the premise of ensuring the safety of the circuit is a problem to be solved by the technicians in the field.
Disclosure of Invention
The application aims to provide a control method, a control device and a medium for starting an inverter, so that the inverter can be started normally on the premise of ensuring the safety of a circuit.
In order to solve the above technical problems, the present application provides a control method for starting an inverter, including:
short circuit monitoring is carried out on a circuit between the battery and the first capacitor through the BMS; the first capacitor is a capacitor for starting the inverter;
if the current in the circuit between the battery and the first capacitor is monitored to be greater than a first threshold value, a short-circuit protection circuit is started; wherein the short-circuit protection circuit is a circuit for reducing current in a loop of the battery and the first capacitor;
closing the short-circuit protection circuit after a first preset time period from starting the short-circuit protection circuit; the first preset time period is shorter than the time period when the first capacitor reaches rated voltage;
if the current in the circuit between the battery and the first capacitor is monitored to be greater than a second threshold value within a second preset time period after the short-circuit protection circuit is closed, starting the short-circuit protection circuit; the second preset duration is smaller than the duration of starting the inverter;
and if the current in the circuit between the battery and the first capacitor is not monitored to be greater than the second threshold value within the second preset time after the short-circuit protection circuit is closed, shielding the short-circuit monitoring.
Preferably, after shielding the short circuit monitoring, the method further comprises:
after a third preset time period from closing the short-circuit protection circuit, recovering the short-circuit monitoring; the third preset time period is longer than the second preset time period, and the third preset time period is longer than the starting time period of the inverter.
Preferably, the third preset time period is determined according to a plurality of historical test data.
Preferably, before determining the first preset time period, the method further includes:
acquiring a capacitance value of the first capacitor;
the determining the first preset duration includes:
determining the first preset time length according to the capacitance value; wherein the capacitance value is positively correlated with the first preset duration.
Preferably, determining the second preset time period includes:
and determining the second preset time length according to the charging time length of the second capacitor in the operational amplifier circuit of the BMS.
Preferably, the short-circuit protection circuit specifically includes:
the battery and the first capacitor are connected through a resistor;
the start-up short circuit protection circuit includes:
and switching a circuit directly connected between the battery and the first capacitor into a circuit connected through a resistor.
Preferably, after shielding the short circuit monitoring, the method further comprises:
after determining that the inverter is started, the short circuit monitoring is resumed.
In order to solve the above technical problem, the present application further provides a control device for starting an inverter, including:
the monitoring module is used for monitoring short circuit of a circuit between the battery and the first capacitor through the BMS; the first capacitor is a capacitor for starting the inverter;
the first starting module is used for starting the short-circuit protection circuit if the current in the circuit between the battery and the first capacitor is monitored to be larger than a first threshold value; wherein the short-circuit protection circuit is a circuit for reducing current in a loop of the battery and the first capacitor;
the closing module is used for closing the short-circuit protection circuit after a first preset time period from the start of the short-circuit protection circuit; the first preset time period is shorter than the time period when the first capacitor reaches rated voltage;
the second starting module is used for starting the short-circuit protection circuit if the current in the circuit between the battery and the first capacitor is monitored to be greater than a second threshold value within a second preset duration after the short-circuit protection circuit is closed; the second preset duration is smaller than the duration of starting the inverter;
and the shielding module is used for shielding the short circuit monitoring if the current in the circuit between the battery and the first capacitor is not monitored to be greater than the second threshold value within the second preset time after the short circuit protection circuit is closed.
In order to solve the above technical problem, the present application further provides a control device for starting an inverter, including: a memory for storing a computer program;
and the processor is used for realizing the steps of the control method for starting the inverter when executing the computer program.
In order to solve the above technical problem, the present application further provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the steps of the control method for starting an inverter described above.
The control method for starting the inverter provided by the application can monitor the short circuit of the circuit between the battery and the first capacitor; the first capacitor is a capacitor for starting the inverter. If the current in the circuit between the battery and the first capacitor is monitored to be greater than a first threshold value, starting a short-circuit protection circuit to prevent the high current from damaging elements in the circuit; the short-circuit protection circuit is a circuit for reducing the current in the circuit of the battery and the first capacitor, and after the short-circuit protection circuit is started, the charging of the first capacitor becomes slow, so that the rated voltage can be reached only after a long time is required. Therefore, closing the short-circuit protection circuit after a first preset time period from starting the short-circuit protection circuit; the first preset time period is smaller than the time period when the first capacitor reaches the rated voltage. If the current in the circuit between the battery and the first capacitor is monitored to be larger than a second threshold value within a second preset time after the short-circuit protection circuit is closed, the circuit is judged to be truly short-circuited, and the short-circuit protection circuit is started; the second preset duration is smaller than the duration of starting the inverter. If the current in the circuit between the battery and the first capacitor is not monitored to be greater than a second threshold value within a second preset time period after the short-circuit protection circuit is closed, the short-circuit protection circuit is characterized in that the short-circuit is not generated in the circuit, and the current which is greater than the second threshold value and is generated before the inverter is started is not a real short-circuit, the short-circuit protection is not started after the short-circuit protection is monitored to be ignored. The method provided by the embodiment of the application can determine whether the circuit is really short-circuited, and can normally start the inverter on the premise of ensuring the safety of the circuit.
The application also provides a control device for starting the inverter and a computer readable storage medium, which correspond to the method, and have the same beneficial effects as the method.
Drawings
For a clearer description of embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described, it being apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 is a schematic diagram of a connection circuit between a battery and a capacitor;
fig. 2 is a flowchart of a control method for starting an inverter according to an embodiment of the present application;
FIG. 3 is a voltage waveform diagram of a capacitor of the starting inverter when a short circuit occurs due to charging between the battery and the capacitor;
fig. 4 is a block diagram of a control device for starting an inverter according to an embodiment of the present application;
fig. 5 is a block diagram of a control device for starting an inverter according to another embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without making any inventive effort are within the scope of the present application.
The application provides a control method, a control device and a control medium for starting an inverter, so that the inverter can be started normally on the premise of ensuring the safety of a circuit.
In order to better understand the aspects of the present application, the present application will be described in further detail with reference to the accompanying drawings and detailed description.
In the application of household energy storage, a lithium ion battery is generally adopted as a direct current power supply, if the lithium ion battery is directly connected into a circuit shown in fig. 1, the lithium ion battery is likely to be damaged by instantaneous heavy current discharge, and therefore, after the BMS monitors the heavy current, the discharge overcurrent protection of the lithium ion battery is triggered or a short-circuit protection circuit is started. Taking fig. 1 as an example, when the battery DC charges the capacitor C0 normally, the switch S1 is closed, and the switch S2 is opened; and after the short-circuit protection circuit is turned on, the switch S1 is opened and the switch S2 is closed. After the BMS monitors the current greater than the threshold value, the circuit is switched into a pre-charging loop to protect the circuit, and after the secondary pre-charging loop is switched back to the main loop, the charging between the battery DC and the capacitor C0 is triggered again, and a short-time heavy current appears again; at the moment, the circuit is not required to be protected and is normally charged. And the BMS cannot distinguish whether the charging between the battery DC and the capacitor C0 results in a current greater than the threshold value or whether the circuit actually has a short circuit resulting in a current greater than the threshold value. If the BMS starts short-circuit protection under all conditions, the inverter cannot be started normally; and the BMS does not activate short-circuit protection in all cases, which may lead to circuit failure. Therefore, the embodiment of the application provides a control method for starting an inverter so as to distinguish the two cases. Fig. 2 is a flowchart of a control method for starting an inverter according to an embodiment of the present application; as shown in fig. 2, the method comprises the steps of:
s10: the short circuit between the battery and the first capacitor is monitored by the BMS.
The first capacitor is a capacitor for starting the inverter. The embodiment of the present application is illustrated by taking the circuit structure in fig. 1 as an example, but the method provided by the present application is not limited to the circuit structure shown in fig. 1. As shown in fig. 1, a capacitor C0 is a first capacitor, and is used as a starting power source of an electronic circuit inside the inverter. Under normal conditions, when the battery DC charges the first capacitor, the control switch S1 is closed, and the switch S2 is opened (main loop); if a lithium ion battery is used as the battery DC, the battery DC cannot withstand an excessive current when the current in the circuit is greater than a threshold value and is easily damaged by a large current surge, and therefore, at this time, the protection circuit needs to be turned on, that is, the control switch S1 is turned off and the switch S2 is turned on (pre-charge circuit).
S11: if the current in the circuit between the battery and the first capacitor is monitored to be greater than a first threshold, a short circuit protection circuit is started.
The short-circuit protection circuit is a circuit for reducing current in a loop of the battery and the first capacitor. When the current between the battery DC and the loop of the first capacitor is monitored to be larger than the first threshold, the switch S1 is controlled to be opened, the switch S2 is controlled to be closed, the resistor R is increased in the loop, the current in the loop is reduced, and the battery DC can be protected. In practical application, the short-circuit protection can be realized by other circuits, and is not limited to the mode shown in fig. 1, for example, a variable resistor can be added in the original loop, and the resistance value of the variable resistor can be increased when the short-circuit protection circuit is started.
S12: and closing the short-circuit protection circuit after a first preset time period from the start of the short-circuit protection circuit.
The first preset time period is smaller than the time period when the first capacitor reaches the rated voltage. When the short-circuit protection circuit is started, a resistor R is added between the battery DC and the loop of the first capacitor, which causes the voltage of the first capacitor to increase to the rated voltage for a long time, and the electronic circuit inside the inverter consumes the electric energy stored in the first capacitor, so that after a period of time, the short-circuit protection circuit needs to be closed, i.e. switched back to the main loop, to provide enough voltage. In general, when the voltage of the first capacitor is slightly lower than the rated voltage, the short-circuit protection circuit is turned off, and the value of the first preset time period is related to the rated voltage and the capacitance of the first capacitor, and can be adjusted according to the rated voltage and the capacitance of the first capacitor when the capacitor is actually set.
S13: judging whether the current in the circuit between the battery and the first capacitor is monitored to be larger than a second threshold value within a second preset time period after the short-circuit protection circuit is closed; if yes, go to step S14; if not, the process proceeds to step S15.
S14: the short-circuit protection circuit is started.
S15: and shielding short circuit monitoring.
The first preset time period, the second preset time period and the third preset time period can be all counted through a timer, wherein the second preset time period is smaller than the starting time period of the inverter. After the timing is finished, the BMS executes corresponding operations, and in addition, the first threshold value and the second threshold value of the current can be set to the same value or can be set to different values, and the current is selected according to actual conditions. FIG. 3 is a voltage waveform diagram of a capacitor of the starting inverter when a short circuit occurs due to charging between the battery and the capacitor; as shown in fig. 3, the BMS monitors the short circuit between the battery DC and the first capacitor for a long period of time, detects the short circuit at the point a (usually at the moment when the battery DC is connected with the first capacitor), and switches to the pre-charge circuit at this time, but under the pre-charge circuit, the first capacitor needs a long time to reach the rated voltage, so after the time T1 passes, the circuit switches to the main circuit after the time B is reached, and the time T1 can be properly adjusted according to the capacitance of the first capacitor. After switching the main loop, continuously monitoring the circuit in the time period from the point B to the point C in the time period of T2, and if the current larger than the second threshold value appears at the moment, indicating that a real short circuit appears, and switching the circuit into a pre-charging loop; if no current larger than the second threshold value appears, the short circuit monitoring can be shielded temporarily, and after the time T3, the first capacitor starts the inverter normally at the point D, and at this time, a large current appears, and the purpose of the short circuit monitoring is to ignore the large current. And after the T4 time, short circuit monitoring is recovered at the E point, and abnormal conditions are monitored. The length of time T4 is not limited, and is typically set to remain sufficient to start the inverter. The time length of T1, T2, T3 and T4 can be set according to actual conditions, wherein T1 is equal to a first preset time length, T2 is equal to a second preset time length, and T2+T3+T4 is equal to a third preset time length.
The control method for starting the inverter provided by the application can monitor the short circuit of the circuit between the battery and the first capacitor; the first capacitor is a capacitor for starting the inverter. If the current in the circuit of the battery is monitored to be greater than a first threshold value, starting a short-circuit protection circuit to prevent the high current from damaging elements in the circuit; the short-circuit protection circuit is a circuit for reducing the current in the circuit of the battery and the first capacitor, and after the short-circuit protection circuit is started, the charging of the first capacitor becomes slow, so that the rated voltage can be reached only after a long time is required. Therefore, closing the short-circuit protection circuit after a first preset time period from starting the short-circuit protection circuit; the first preset time period is smaller than the time period when the first capacitor reaches the rated voltage. If the current in the circuit between the battery and the first capacitor is monitored to be larger than a second threshold value within a second preset time after the short-circuit protection circuit is closed, the circuit is judged to be truly short-circuited, and the short-circuit protection circuit is started; the second preset duration is smaller than the duration of starting the inverter. If the current in the circuit between the battery and the first capacitor is not monitored to be greater than a second threshold value within a second preset time period after the short-circuit protection circuit is closed, the short-circuit protection circuit is characterized in that the short-circuit is not generated in the circuit, and the current which is greater than the second threshold value and is generated before the inverter is started is not a real short-circuit, the short-circuit protection is not started after the short-circuit protection is monitored to be ignored. The method provided by the embodiment of the application can determine whether the circuit is really short-circuited, and can normally start the inverter on the premise of ensuring the safety of the circuit.
In the above embodiment, it is not limited when to resume the short-circuit monitoring after the shield short-circuit monitoring, but in practical application, after the inverter is normally started, the short-circuit monitoring needs to be resumed, and the abnormal condition in the circuit needs to be monitored in time. Therefore, after a third preset period of time from closing the short-circuit protection circuit, the short-circuit monitoring is resumed; the third preset time length is determined according to the historical test data of a plurality of times. The third preset time period is longer than the second preset time period, and the third preset time period is longer than the starting time period of the inverter. The specific length of the third preset duration is not required, and is generally enough to keep enough time to start the inverter, so that a proper value can be determined according to historical test data, the inverter can be ensured to be normally started, and the circuit can be prevented from being in a non-monitoring state for a long time, so that serious circuit accidents occur. According to the scheme provided by the embodiment of the application, after the third preset time period from the closing of the short-circuit protection circuit, the short-circuit monitoring is resumed, so that the monitoring of the circuit can be resumed after the inverter is started, and the circuit element is prevented from being damaged by high current.
In the above embodiment, the length of the first preset time period is not limited, and the value of the first preset time period is related to the capacitance value of the first capacitor, generally, the larger the capacitance value of the first capacitor is, the longer the time that the first capacitor reaches the rated voltage is, so before determining the first preset time period, the method further includes: acquiring a capacitance value of the first capacitor; the determining of the first preset duration includes: determining a first preset time length according to the capacitance value; wherein the capacitance value is positively correlated with the first predetermined time period. The short-circuit protection circuit is generally required to be turned off when the voltage of the first capacitor is slightly lower than the rated voltage, so that the short-circuit protection circuit can be turned off at a more accurate time point by determining the first preset duration according to the capacitance value of the first capacitor. Taking the circuit in fig. 1 as an example, in practice, the first preset duration may be set according to the voltage at two ends of the battery and the resistance value of the resistor.
In practical application, the second preset duration is only slightly longer than the duration of the BMS short circuit detection, so that determining the second preset duration includes: and determining a second preset time length according to the charging time length of the second capacitor in the operational amplifier circuit of the BMS. The charging time of the second capacitor in the operational amplifier circuit of the BMS is equal to the time of the BMS short circuit detection, and the second preset time can be determined according to the charging time of the second capacitor.
In the above embodiment, it is mentioned that the short-circuit monitoring is resumed after the third preset time period from the closing of the short-circuit protection circuit, and this scheme is to resume the short-circuit monitoring after the fixed time period is set, and it is generally necessary to reserve a sufficient time. The embodiment of the application provides another scheme, after shielding short circuit monitoring, the method further comprises the following steps: after determining that the inverter is started, short circuit monitoring is resumed. According to the scheme provided by the embodiment of the application, extra time is not required to be reserved, and after the start of the inverter is determined, the short circuit monitoring is directly recovered, so that the circuit can be prevented from being broken down.
In the above embodiments, the detailed description is given of the control method for starting the inverter, and the application also provides a corresponding embodiment of the control device for starting the inverter. It should be noted that the present application describes an embodiment of the device portion from two angles, one based on the angle of the functional module and the other based on the angle of the hardware.
Based on the angle of the functional module, the present embodiment provides a control device for starting an inverter, and fig. 4 is a structural diagram of the control device for starting an inverter provided in the embodiment of the present application, as shown in fig. 4, the device includes:
a monitoring module 10 for short-circuit monitoring of a circuit between the battery and the first capacitor through the BMS; the first capacitor is a capacitor for starting the inverter.
A first starting module 11, configured to start a short-circuit protection circuit if it is monitored that the current in the circuit between the battery and the first capacitor is greater than a first threshold; the short-circuit protection circuit is a circuit for reducing current in a loop of the battery and the first capacitor.
A closing module 12, configured to close the short-circuit protection circuit after a first preset duration from starting the short-circuit protection circuit; the first preset time period is smaller than the time period when the first capacitor reaches the rated voltage.
A judging module 13, configured to judge that the current in the circuit between the battery and the first capacitor is monitored to be greater than a second threshold value within a second preset period after the short-circuit protection circuit is turned off; if so, triggering the second start module 14; if not, the shielding module 15 is triggered. The second preset duration is smaller than the duration of starting the inverter.
The second starting module 14 is used for starting the short-circuit protection circuit.
And a shielding module 15 for shielding the short circuit monitoring.
Since the embodiments of the apparatus portion and the embodiments of the method portion correspond to each other, the embodiments of the apparatus portion are referred to the description of the embodiments of the method portion, and are not repeated herein.
The control device for starting the inverter provided by the embodiment corresponds to the method, so that the control device has the same beneficial effects as the method.
Based on the hardware angle, the present embodiment provides another control device for starting an inverter, and fig. 5 is a structural diagram of the control device for starting an inverter according to another embodiment of the present application, as shown in fig. 5, the control device for starting an inverter includes: a memory 20 for storing a computer program;
a processor 21 for implementing the steps of the control method of starting the inverter as mentioned in the above embodiments when executing a computer program.
The control device for starting the inverter provided in this embodiment may include, but is not limited to, a smart phone, a tablet computer, a notebook computer, a desktop computer, or the like.
Processor 21 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 21 may be implemented in hardware in at least one of a digital signal processor (Digital Signal Processor, DSP), a Field programmable gate array (Field-Programmable Gate Array, FPGA), a programmable logic array (Programmable Logic Array, PLA). The processor 21 may also comprise a main processor, which is a processor for processing data in an awake state, also called central processor (Central Processing Unit, CPU), and a coprocessor; a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 21 may be integrated with an image processor (Graphics Processing Unit, GPU) for taking care of rendering and rendering of the content that the display screen is required to display. In some embodiments, the processor 21 may also include an artificial intelligence (Artificial Intelligence, AI) processor for processing computing operations related to machine learning.
Memory 20 may include one or more computer-readable storage media, which may be non-transitory. Memory 20 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In this embodiment, the memory 20 is at least used for storing a computer program 201, wherein the computer program, when loaded and executed by the processor 21, is capable of implementing the relevant steps of the control method for starting an inverter disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 20 may further include an operating system 202, data 203, and the like, where the storage manner may be transient storage or permanent storage. The operating system 202 may include Windows, unix, linux, among others. The data 203 may include, but is not limited to, data related to a control method of starting the inverter, and the like.
In some embodiments, the control device for starting the inverter may further include a display 22, an input/output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.
It will be appreciated by those skilled in the art that the configuration shown in the figures does not constitute a limitation of the control means for starting the inverter and may include more or less components than those shown.
The control device for starting the inverter provided by the embodiment of the application comprises a memory and a processor, wherein the processor can realize the following method when executing a program stored in the memory: a control method of an inverter is started.
The control device for starting the inverter provided by the embodiment corresponds to the method, so that the control device has the same beneficial effects as the method.
Finally, the application also provides a corresponding embodiment of the computer readable storage medium. The computer-readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps as described in the method embodiments above.
It will be appreciated that the methods of the above embodiments, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored on a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all of the technical solution contributing to the prior art, or may be embodied in the form of a software product stored in a storage medium, performing all or part of the steps of the method described in the various embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The computer readable storage medium provided in the present embodiment corresponds to the above method, and thus has the same advantageous effects as the above method.
The control method, the device and the medium for starting the inverter provided by the application are described in detail. In the description, each embodiment is described in a progressive manner, and each embodiment is mainly described by the differences from other embodiments, so that the same similar parts among the embodiments are mutually referred. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the application can be made without departing from the principles of the application and these modifications and adaptations are intended to be within the scope of the application as defined in the following claims.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A control method for starting an inverter, comprising:
short circuit monitoring is carried out on a circuit between the battery and the first capacitor through the BMS; the first capacitor is a capacitor for starting the inverter;
if the current in the circuit between the battery and the first capacitor is monitored to be greater than a first threshold value, a short-circuit protection circuit is started; the short-circuit protection circuit is a circuit for reducing current in a loop of the battery and the first capacitor;
closing the short-circuit protection circuit after a first preset time period from starting the short-circuit protection circuit; the first preset time period is shorter than the time period when the first capacitor reaches rated voltage;
if the current in the circuit between the battery and the first capacitor is monitored to be greater than a second threshold value within a second preset time period after the short-circuit protection circuit is closed, starting the short-circuit protection circuit; the second preset duration is smaller than the duration of starting the inverter;
and if the current in the circuit between the battery and the first capacitor is not monitored to be greater than the second threshold value within the second preset time after the short-circuit protection circuit is closed, shielding the short-circuit monitoring.
2. The control method for starting an inverter according to claim 1, wherein after shielding the short-circuit monitoring, further comprising:
after a third preset time period from closing the short-circuit protection circuit, recovering the short-circuit monitoring; the third preset time period is longer than the second preset time period, and the third preset time period is longer than the starting time period of the inverter.
3. The control method for starting an inverter according to claim 2, wherein the third preset time period is determined based on a plurality of historical test data.
4. The control method for starting an inverter according to claim 1, further comprising, before determining the first preset time period:
acquiring a capacitance value of the first capacitor;
the determining the first preset duration includes:
determining the first preset time length according to the capacitance value; wherein the capacitance value is positively correlated with the first preset duration.
5. The control method for starting an inverter according to claim 1, wherein determining the second preset time period includes:
and determining the second preset time length according to the charging time length of the second capacitor in the operational amplifier circuit of the BMS.
6. The control method for starting an inverter according to any one of claims 1 to 5, wherein the short-circuit protection circuit is specifically:
the battery and the first capacitor are connected through a resistor;
the start-up short circuit protection circuit includes:
and switching a circuit directly connected between the battery and the first capacitor into a circuit connected through a resistor.
7. The control method for starting an inverter according to claim 1, wherein after shielding the short-circuit monitoring, further comprising:
after determining that the inverter is started, the short circuit monitoring is resumed.
8. A control device for starting an inverter, comprising:
the monitoring module is used for monitoring short circuit of a circuit between the battery and the first capacitor through the BMS; the first capacitor is a capacitor for starting the inverter;
the first starting module is used for starting the short-circuit protection circuit if the current in the circuit between the battery and the first capacitor is monitored to be larger than a first threshold value; wherein the short-circuit protection circuit is a circuit for reducing current in a loop of the battery and the first capacitor;
the closing module is used for closing the short-circuit protection circuit after a first preset time period from the start of the short-circuit protection circuit; the first preset time period is shorter than the time period when the first capacitor reaches rated voltage;
the second starting module is used for starting the short-circuit protection circuit if the current in the circuit between the battery and the first capacitor is monitored to be greater than a second threshold value within a second preset duration after the short-circuit protection circuit is closed; the second preset duration is smaller than the duration of starting the inverter;
and the shielding module is used for shielding the short circuit monitoring if the current in the circuit between the battery and the first capacitor is not monitored to be greater than the second threshold value within the second preset time after the short circuit protection circuit is closed.
9. A control device for starting an inverter, comprising a memory for storing a computer program;
a processor for implementing the steps of the control method for starting an inverter according to any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the control method of starting an inverter according to any one of claims 1 to 7.
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| CN202210446474.3A CN114865901B (en) | 2022-04-26 | 2022-04-26 | Control method, device and medium for starting inverter |
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| CN202210446474.3A CN114865901B (en) | 2022-04-26 | 2022-04-26 | Control method, device and medium for starting inverter |
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| CN214125146U (en) * | 2021-01-20 | 2021-09-03 | 合肥科威尔电源系统股份有限公司 | Capacitive load high-voltage starting current-impact-preventing circuit |
| CN215344037U (en) * | 2021-07-29 | 2021-12-28 | 深圳市鼎芯无限科技有限公司 | Battery driving circuit and lithium battery using same |
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| JP2005080456A (en) * | 2003-09-02 | 2005-03-24 | Toyota Motor Corp | Power supply |
| CN109787314A (en) * | 2019-02-19 | 2019-05-21 | 惠州拓邦电气技术有限公司 | A kind of method, apparatus and product of BMS short-circuit protection |
| CN112467814A (en) * | 2019-09-09 | 2021-03-09 | 宁波拓邦智能控制有限公司 | Battery pack discharge management method and system |
| CN214125146U (en) * | 2021-01-20 | 2021-09-03 | 合肥科威尔电源系统股份有限公司 | Capacitive load high-voltage starting current-impact-preventing circuit |
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| CN114865901A (en) | 2022-08-05 |
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