CN117318137A - Conversion system of intelligent power module in energy storage circuit - Google Patents

Conversion system of intelligent power module in energy storage circuit Download PDF

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Publication number
CN117318137A
CN117318137A CN202311042531.2A CN202311042531A CN117318137A CN 117318137 A CN117318137 A CN 117318137A CN 202311042531 A CN202311042531 A CN 202311042531A CN 117318137 A CN117318137 A CN 117318137A
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CN
China
Prior art keywords
temperature
converter
working state
module
protection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311042531.2A
Other languages
Chinese (zh)
Inventor
汪菲
李绍祥
陈果
崔健
孙阿欢
房玉祥
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hefei Switch Factory Co ltd
Original Assignee
Hefei Switch Factory Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hefei Switch Factory Co ltd filed Critical Hefei Switch Factory Co ltd
Priority to CN202311042531.2A priority Critical patent/CN117318137A/en
Publication of CN117318137A publication Critical patent/CN117318137A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • 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
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Thermal Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Inverter Devices (AREA)

Abstract

The invention relates to the technical field of energy storage circuits, in particular to a conversion system of an intelligent power module in an energy storage circuit, which is used for collecting all working state parameters of a converter in real time through a collecting module and sending the working state parameters to a control module, wherein the control module receives the working state parameters and classifies the working state parameters, a plurality of groups of protection thresholds are preset in the control module, the plurality of groups of protection thresholds are in one-to-one correspondence with the classified working state parameters, the classified working state parameters and the protection thresholds are compared and analyzed to obtain a plurality of groups of analysis results, a working instruction is sent to a protection module according to the obtained analysis results, the protection module is used for controlling a driving module to execute instruction actions according to the working instruction, and the driving module is used for driving a switch in the energy storage circuit to work, if the working state of the converter is abnormal, the converter is closed, and damage caused by the abnormal working state of the converter is avoided.

Description

Conversion system of intelligent power module in energy storage circuit
Technical Field
The invention relates to the technical field of energy storage circuits, in particular to a conversion system of an intelligent power module in an energy storage circuit.
Background
The development of the electricity storage technology makes the application scene of the battery richer. Because the current and the voltage of a single storage battery are lower, in order to meet the current and voltage requirements in a circuit, a plurality of storage batteries are generally connected into an energy storage circuit for use at the same time, but the working state of a battery pack cannot be adaptively adjusted according to the power consumption of a load due to the fact that the existing energy storage circuit is relatively fixed in connection mode.
The chinese patent application No. CN202110745536.6 proposes a control method of an energy storage circuit, by obtaining load information of a load circuit, determining a target number of battery modules to be started and a target on time according to the load information, so as to be used for supplying power to the load circuit.
However, the applicant has found that the prior art has at least the following problems:
the inverter is required to be used in the energy storage circuit, and the battery pack of the energy storage circuit is powered, so that the input and output currents and voltages of the inverter are unstable, and the inverter is damaged in severe cases.
Disclosure of Invention
Therefore, the invention aims to provide a conversion system of an intelligent power module in an energy storage circuit, which solves the problem that the input and output currents and voltages of a converter are unstable, so that the converter is damaged.
Based on the above object, the present invention provides a conversion system of an intelligent power module in a tank circuit, which is applied to a converter in the tank circuit, and includes:
the acquisition module is used for acquiring working state parameters of the converter in the energy storage circuit and sending the working state parameters out;
the control module receives the working state parameters, classifies the working state parameters, compares the classified working state parameters with the corresponding protection threshold values to obtain analysis results, and sends out working instructions according to the analysis results;
the driving module is used for driving a switch in the energy storage circuit to work;
and the protection module receives the working instruction and executes the instruction action to the driving module according to the working instruction.
The acquisition module acquires various working state parameters of the converter in real time when the converter works, the working state parameters are sent to the control module, the control module receives the working state parameters and classifies the working state parameters, a plurality of groups of protection thresholds are preset in the control module, the protection thresholds correspond to the classified working state parameters one by one, the classified working state parameters and the protection thresholds are compared and analyzed to obtain a plurality of groups of analysis results, a working instruction is sent to the protection module according to the obtained analysis results, the protection module controls the driving module to execute instruction actions according to the working instruction, the driving module drives a switch in the energy storage circuit to work, if the working state of the converter is abnormal, the converter is closed, and damage of the converter due to the abnormal working state is avoided.
Optionally, the operating state parameters include input side current, input side voltage, inductor current, and converter temperature; the protection threshold includes an input side current threshold, an input side voltage threshold, an inductor current threshold, and a temperature threshold.
Optionally, the acquisition unit is used for extracting corresponding instantaneous values of working state parameters of the converter according to a certain time interval to obtain a sampling signal;
the conditioning unit is used for carrying out hardware calibration on the sampling signals and converting the sampling signals into identifiable signals under working conditions;
and the signal transmitting unit is used for transmitting the identifiable signal converted from the working state parameter to the outside to the control device.
Optionally, the acquisition unit includes:
the current acquisition element is used for acquiring input side current and inductance current;
the voltage acquisition element is used for acquiring input side voltage;
and the temperature acquisition unit is used for acquiring the temperature of the converter.
Optionally, the control module includes:
the signal transmission unit is used for communicating with the outside;
the storage unit is used for storing protection thresholds, including an input current threshold, an inductance current threshold, an input voltage threshold and a temperature threshold;
the data processing unit is used for receiving the working state parameters, analyzing and classifying the working state parameters, and dividing the working state parameters into input side current, inductance current, input side voltage and converter temperature;
judging whether the input side current touches the input current threshold value, whether the inductance current touches the inductance current threshold value, whether the input side voltage touches the input voltage threshold value, and whether the converter temperature touches the temperature threshold value;
if at least one item touches, sending a working instruction to the protection module; if not, the working state parameters are received circularly.
Optionally, the input current threshold, the inductance current threshold, the input voltage threshold and the temperature threshold comprise two stages, the two stages have a low sniff value and a high threshold value, the low sniff value is lower than the high threshold value, when the working state parameter touches the low sniff value but does not touch the high threshold value, the control module starts protection delay and informs the upper computer of the state, the upper computer alarms, after the delay setting time, if the working state parameter is not lower than the low sniff value yet, the protection module starts protection, blocks PWM, closes the converter, simultaneously sends a signal to an input/output side switch of the converter, isolates the input/output side, feeds fault information back to the upper computer, and if the working state parameter is lower than the low sniff value in the setting time, restores the normal state and informs the upper computer, and the upper computer cancels the alarm; if the working state parameter reaches the high threshold value, the control module directly starts protection, fault information is fed back to the upper computer, and the upper computer alarms and displays the fault information.
Optionally, the acquisition module further comprises a short circuit acquisition unit, which is used for monitoring whether the energy storage circuit is short-circuited;
the driving module comprises a latch unit which is used for temporarily storing information when the energy storage circuit is short-circuited.
Optionally, the temperature acquisition unit is including installing the installation shell on the converter, the inside liquid cooling pipe that still installs of installation shell, liquid cooling pipe laminating converter outer wall bending sets up, still installs fixed thermometer on the converter outer wall for gather the temperature of converter.
Optionally, the inside adaptation of liquid cooling pipe is installed and is inhaled the movable block, and the movable block is inhaled to magnetism moves along with the inside coolant liquid flow of liquid cooling pipe, and the outside cover of liquid cooling pipe is equipped with the magnetism and is inhaled the movable ring, and the magnetism is inhaled the movable ring and is inhaled the movable block with magnetism and remove under the magnetic force, and the magnetism is inhaled the movable ring and is connected with the removal thermometer, fixed thermometer installs in the center department of converter outer wall, measures center temperatureWhen the movable thermometer moves to be close to one of the side walls of the mounting shell, the temperature of the primary transducer is measured and recorded as the edge temperature +.>Center temperature->And edge temperature->If the protection threshold is not touched, judging the center temperature +.>And edge temperature->If the difference value is within the difference value range, the current working state is maintained, and if the difference value is within the difference value range, the flow rate of the cooling liquid is increased; when the center temperature is +>And edge temperature->At least one of the access protection thresholds is used to increase the coolant flow rate and at the same time send a central temperature to the control module>And edge temperature->As the higher of the converter temperatures.
Optionally, the mounting groove has been seted up respectively on the lateral wall of mounting shell, installs electric telescopic handle in the mounting groove, and contact switch is installed to electric telescopic handle front end, and electric telescopic handle is extension under normal condition, and when contact switch and magnetism inhale the removal ring contact, electric telescopic handle time delay settlement time back is retracted, removes the thermometer temperature measurement simultaneously, when the contact switch along coolant flow direction low reaches triggers, then the electric telescopic handle extension of retraction resets.
When the contact switch is contacted with the magnetic attraction moving ring, the magnetic attraction moving ring is blocked, the magnetic attraction moving block moves along with the cooling liquid and is separated from the magnetic attraction moving ring, after the setting, the electric telescopic rod is retracted, when the magnetic attraction moving block moves back for one cycle, the magnetic attraction moving ring is driven to continuously move forwards, and when the contact switch at the downstream of the cooling liquid flowing direction is triggered, the retracted electric telescopic rod is extended and reset, so that the temperature measurement of the edge of the transducer by the movable thermometer is realized.
The invention has the beneficial effects that: the invention provides a conversion system of an intelligent power module in an energy storage circuit, which is characterized in that each working state parameter of the converter during working is acquired in real time through an acquisition module, the working state parameter is sent to a control module, the control module receives the working state parameter, classifies the working state parameter, a plurality of groups of protection thresholds are preset in the control module, the plurality of groups of protection thresholds correspond to the classified working state parameter one by one, the classified working state parameter is compared with the protection thresholds for analysis, a plurality of groups of analysis results are obtained, a working instruction is sent to the protection module according to the obtained analysis results, the protection module controls a driving module to execute instruction action according to the working instruction, and if the working state of the converter is abnormal, the converter is closed, and damage caused by the abnormal working state of the converter is avoided.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only of the invention and that other drawings can be obtained from them without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a conversion system of an intelligent power module in a tank circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an acquisition module of a conversion system of an intelligent power module in a tank circuit according to an embodiment of the present invention;
FIG. 3 is an electrical schematic diagram illustrating a transformer protection of a transformation system of an intelligent power module in a tank circuit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a temperature acquisition unit of a conversion system of an intelligent power module in a tank circuit according to an embodiment of the present invention;
fig. 5 is an enlarged partial schematic view of the portion a in fig. 4.
Marked in the figure as:
501. a mounting shell; 502. a mounting groove; 503. an electric telescopic rod; 504. fixing a thermometer; 505. a liquid-cooled tube; 506. a magnetic attraction moving block; 507. a through hole; 508. a magnetic attraction moving ring; 509. moving the thermometer; 510. an ingress pipe; 511. an outlet port; 512. and a delivery tube.
Detailed Description
The present invention will be further described in detail with reference to specific embodiments in order to make the objects, technical solutions and advantages of the present invention more apparent.
It is to be noted that unless otherwise defined, technical or scientific terms used herein should be taken in a general sense as understood by one of ordinary skill in the art to which the present invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
As shown in fig. 1 and 3, a specific embodiment of the present invention provides a conversion system of an intelligent power module in a tank circuit, which is applied to a converter in the tank circuit, and includes:
the acquisition module 11 is used for acquiring working state parameters of the converter in the energy storage circuit and sending the working state parameters out;
the control module 12 receives the working state parameters, classifies the working state parameters, compares the classified working state parameters with the corresponding protection threshold values to obtain analysis results, and sends out working instructions according to the analysis results;
a driving module 14 for driving the switch in the energy storage circuit to operate;
the protection module 13 receives the work instruction, and executes the instruction operation to the driving module 14 according to the work instruction.
In the operation process of the energy storage circuit, the acquisition module 11 acquires various working state parameters of the converter in real time, the working state parameters are sent to the control module 12, the control module 12 receives the working state parameters and classifies the working state parameters, a plurality of groups of protection thresholds are preset in the control module 12, the plurality of groups of protection thresholds correspond to the classified working state parameters one by one, the classified working state parameters and the protection thresholds are compared and analyzed to obtain a plurality of groups of analysis results, a working instruction is sent to the protection module 13 according to the obtained analysis results, the protection module 13 controls the driving module 14 to execute instruction actions according to the working instruction, the driving module 14 drives the switch in the energy storage circuit to work, and if the working state of the converter is abnormal, the converter is closed, so that the converter is prevented from being damaged due to the abnormal working state.
In some alternative embodiments, the operating state parameters include input side current, input side voltage, inductor current, and converter temperature; the protection threshold includes an input side current threshold, an input side voltage threshold, an inductor current threshold, and a temperature threshold.
In some alternative embodiments, the acquisition module 11 includes:
the acquisition unit 101 is configured to extract corresponding instantaneous values of working state parameters of the converter according to a certain time interval, so as to obtain a sampling signal;
the conditioning unit 102 performs hardware scaling on the sampling signal and converts the sampling signal into a signal which can be identified under the working condition;
the signal transmission unit 103 transmits the identifiable signal converted from the operation state parameter to the outside to the control device 12.
In some alternative embodiments, as shown in fig. 2, the acquisition unit 101 includes:
a current collection element 111 for collecting an input side current and an inductance current;
a voltage acquisition element 112 for acquiring an input side voltage;
and a temperature acquisition unit 113 for acquiring the converter temperature.
The current collection element 111 collects the input side current and the inductance current of the transformer, the voltage collection element 112 collects the input side voltage of the transformer, and the temperature collection unit 113 collects the temperature of the transformer, and monitors the working state of the transformer in real time.
In some alternative embodiments, the control module 12 includes:
a signal transmission unit 201 for communicating with the outside;
a storage unit 202, configured to store protection thresholds, including an input current threshold, an inductor current threshold, an input voltage threshold, and a temperature threshold;
the data processing unit 203 is configured to receive the operating state parameter, analyze and classify the operating state parameter into an input side current, an inductance current, an input side voltage, and a converter temperature;
judging whether the input side current touches the input current threshold value, whether the inductance current touches the inductance current threshold value, whether the input side voltage touches the input voltage threshold value, and whether the converter temperature touches the temperature threshold value;
if at least one of the two items touches, sending a working instruction to the protection module 13; if not, the working state parameters are received circularly.
In some alternative embodiments, the input current threshold, the inductance current threshold, the input voltage threshold, and the temperature threshold include two levels, including a low value and a high threshold, the low value is lower than the high threshold, when the operating state parameter touches the low value but does not touch the high threshold, the control module 12 starts a protection delay and informs the upper computer of a state, the upper computer alarms, after the delay setting time, if the operating state parameter is not lower than the low value, the protection module 13 sends an operating command to the protection module 13, the protection module 13 starts protection, blocks PWM, closes the converter, sends a signal to an input/output side switch of the converter, isolates the input/output side, and feeds back fault information to the upper computer, and if the operating state parameter is lower than the low value in the setting time, the upper computer is restored to a normal state and informed that the upper computer cancels the alarm; if the working state parameter reaches the high threshold value, the control module 12 directly starts protection and feeds back fault information to the upper computer, and the upper computer alarms and displays the fault information.
By setting the two-stage threshold values, the influence of fluctuation of the working state parameters in a certain range on the working condition can be reduced, and the condition of normal operation of the working state parameters can be maximized while the converter is protected.
In some optional embodiments, the collecting module 11 further includes a short-circuit collecting unit, configured to monitor whether the energy storage circuit is shorted;
the driving module 14 includes a latch unit for temporarily storing information when the tank circuit is shorted.
In some alternative embodiments, as shown in fig. 4, the temperature acquisition unit 113 includes a mounting shell 501 mounted on the converter, a liquid cooling tube 505 is further mounted inside the mounting shell 501, the liquid cooling tube 505 is disposed in a curved manner to fit the outer wall of the converter, and a fixed thermometer 504 is further mounted on the outer wall of the converter, for acquiring the temperature of the converter. The temperature of the converter is reduced by the liquid cooling pipe 505, and the temperature of the converter during operation is collected by the fixed thermometer 504.
In some alternative embodiments, as shown in fig. 4 and 5, the liquid cooling tube 505 is internally provided with a magnetic attraction moving block 506 in an adapting manner, the magnetic attraction moving block 506 moves along with the flow of the cooling liquid in the liquid cooling tube 505, a magnetic attraction moving ring 508 is sleeved outside the liquid cooling tube 505, the magnetic attraction moving ring 508 moves along with the magnetic attraction moving block 506 under the action of magnetic force, the magnetic attraction moving ring 508 is connected with a movable thermometer 509, the fixed thermometer 504 is installed at the center of the outer wall of the converter, and the temperature of the center is measuredWhen the movable thermometer 509 is moved to be close to one of the side walls of the mounting case 501, the primary transducer temperature is measured as the edge temperature +.>Center temperature->And edge temperature->If the protection threshold is not touched, judging the center temperature +.>And edge temperature->If the difference value is within the difference value range, the current working state is maintained, and if the difference value is within the difference value range, the flow rate of the cooling liquid is increased; when the center temperature is +>And edge temperature->At least one of the touch protection thresholds is reached, the coolant flow rate is increased, and a central temperature is sent to the control module 12>And edge temperature->As the higher of the converter temperatures.
The cooling liquid drives the magnetic attraction moving block 506 to move, the magnetic attraction moving block 506 drives the magnetic attraction moving ring 508 to move, and then drives the movable thermometer 509 to move, the temperature of each position of the transducer is measured, and the temperature measuring meter 504 is matched and fixed, so that the working temperature of the transducer is detected more comprehensively, and the center temperature is judgedAnd edge temperature->Whether the difference value of the temperature difference value is within the difference value range, thereby judging whether the converter has local overheat, improving the cooling liquid speed and improving the cooling effect.
In some alternative embodiments, as shown in fig. 5, the side walls of the mounting case 501 are respectively provided with a mounting groove 502, an electric telescopic rod 503 is installed in the mounting groove 502, a contact switch is installed at the front end of the electric telescopic rod 503, the electric telescopic rod 503 is extended normally, when the contact switch contacts with the magnetic moving ring 508, the electric telescopic rod 503 is retracted after a delay for a set time, and meanwhile, the temperature detector 509 is moved to measure the temperature, and when the contact switch downstream in the flowing direction of the cooling fluid is triggered, the retracted electric telescopic rod 503 is extended to reset.
When the temperature measuring device is used, after the contact switch is in contact with the magnetic attraction moving ring 508, the magnetic attraction moving ring 508 is blocked, at the moment, the magnetic attraction moving block 506 moves along with cooling liquid and is separated from the magnetic attraction moving ring 508, after the temperature measuring device is set, the electric telescopic rod 503 is retracted, after the magnetic attraction moving block 506 moves back for one cycle, the magnetic attraction moving ring 508 is driven to continue to move forwards, and when the contact switch at the downstream in the flowing direction of the cooling liquid is triggered, the retracted electric telescopic rod 503 is extended and reset, so that the temperature measuring of the edge of the converter by the movable temperature measuring meter 509 is realized.
In some alternative embodiments, as shown in fig. 4 and 5, the liquid cooling tube 505 is connected to an inlet tube 510 that is disposed obliquely, the cooling liquid in the inlet tube 510 pushes the cooling liquid in the liquid cooling tube 505 to move, an outlet 511 is disposed at a position of the liquid cooling tube 505 near the inlet tube 510, the outlet 511 is behind the inlet tube 510, the outlet 511 is connected to an outlet tube 512, a through hole 507 for exchanging the cooling liquid is formed in the magnetic attraction moving block 506, an avoidance opening is formed in the magnetic attraction moving ring 508, and the avoidance inlet tube 510 and the outlet tube 512 are formed.
The working principle of the invention is as follows: in the operation process of the energy storage circuit, the acquisition module 11 acquires various working state parameters of the converter in real time, the working state parameters are sent to the control module 12, the control module 12 receives the working state parameters and classifies the working state parameters, a plurality of groups of protection thresholds are preset in the control module 12, the plurality of groups of protection thresholds correspond to the classified working state parameters one by one, the classified working state parameters and the protection thresholds are compared and analyzed to obtain a plurality of groups of analysis results, a working instruction is sent to the protection module 13 according to the obtained analysis results, the protection module 13 controls the driving module 14 to execute instruction actions according to the working instruction, the driving module 14 drives the switch in the energy storage circuit to work, and if the working state of the converter is abnormal, the converter is closed, so that the converter is prevented from being damaged due to the abnormal working state.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the invention (including the claims) is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the invention, the steps may be implemented in any order and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
The present invention is intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the present invention should be included in the scope of the present invention.

Claims (10)

1. A conversion system of an intelligent power module in a tank circuit, which is applied to a converter in the tank circuit, comprising:
the acquisition module (11) is used for acquiring working state parameters of the converter in the energy storage circuit and sending the working state parameters out;
the control module (12) receives the working state parameters, classifies the working state parameters, compares the classified working state parameters with corresponding protection thresholds to obtain analysis results, and sends out working instructions according to the analysis results;
the driving module (14) is used for driving a switch in the energy storage circuit to work;
and the protection module (13) receives the working instruction and executes the instruction action to the driving module (14) according to the working instruction.
2. The system of claim 1, wherein the operating state parameters include input side current, input side voltage, inductor current, and converter temperature; the protection threshold includes an input side current threshold, an input side voltage threshold, an inductor current threshold, and a temperature threshold.
3. The conversion system of an intelligent power module in a tank circuit of claim 1, comprising: the acquisition unit (101) is used for extracting corresponding instantaneous values of working state parameters of the converter according to a certain time interval to obtain sampling signals;
the conditioning unit (102) is used for carrying out hardware calibration on the sampling signal and converting the sampling signal into a signal which can be identified under the working condition;
and a signal transmission unit (103) for transmitting the identifiable signal converted from the operation state parameter to the outside to the control device (12).
4. A conversion system of an intelligent power module in a tank circuit according to claim 3, characterized in that the acquisition unit (101) comprises:
a current collection element (111) for collecting an input-side current and an inductance current;
a voltage acquisition element (112) for acquiring an input-side voltage;
and the temperature acquisition unit (113) is used for acquiring the temperature of the converter.
5. The conversion system of an intelligent power module in a tank circuit according to claim 1, wherein the control module (12) comprises:
a signal transmission unit (201) for communicating with the outside;
a storage unit (202) for storing protection thresholds including an input current threshold, an inductor current threshold, an input voltage threshold, and a temperature threshold;
the data processing unit (203) is used for receiving the working state parameters, analyzing and classifying the working state parameters, and dividing the working state parameters into input side current, inductance current, input side voltage and converter temperature;
judging whether the input side current touches the input current threshold value, whether the inductance current touches the inductance current threshold value, whether the input side voltage touches the input voltage threshold value, and whether the converter temperature touches the temperature threshold value;
if at least one of the two items touches, sending a working instruction to the protection module (13); if not, the working state parameters are received circularly.
6. The system according to claim 5, wherein the input current threshold, the inductance current threshold, the input voltage threshold, and the temperature threshold comprise two levels, the two levels comprise a low-value and a high-value, the low-value is lower than the high-value, when the operating state parameter touches the low-value but does not touch the high-value, the control module (12) starts a protection delay, informs the upper computer of the state, alarms the upper computer, after the delay setting time, if the operating state parameter is not lower than the low-value, sends an operating command to the protection module (13), the protection module (13) starts protection, PWM, closes the converter, simultaneously sends a signal to an input/output side switch of the converter, isolates the input/output side, and feeds back fault information to the upper computer, and if the operating state parameter is lower than the low-value, restores the normal state, and informs the upper computer of the state, and cancels the alarm if the operating state parameter is lower than the low-value within the setting time; if the working state parameter reaches the high threshold value, the control module (12) directly starts protection, and feeds fault information back to the upper computer, and the upper computer alarms and displays the fault information.
7. The conversion system of an intelligent power module in a tank circuit according to claim 1, wherein the acquisition module (11) further comprises a short-circuit acquisition unit for monitoring whether the tank circuit is short-circuited;
the driving module (14) comprises a latch unit which is used for temporarily storing information when the energy storage circuit is short-circuited.
8. The conversion system of an intelligent power module in a power storage circuit according to claim 4, wherein the temperature acquisition unit (113) comprises a mounting shell (501) mounted on the converter, a liquid cooling tube (505) is further mounted in the mounting shell (501), the liquid cooling tube (505) is attached to the outer wall of the converter in a bending manner, and a fixed thermometer (504) is further mounted on the outer wall of the converter and used for acquiring the temperature of the converter.
9. The conversion system of an intelligent power module in a power storage circuit according to claim 8, wherein the liquid cooling tube (505) is internally provided with a magnetic attraction moving block (506) in an adapting way, the magnetic attraction moving block (506) moves along with the flowing of cooling liquid in the liquid cooling tube (505), the liquid cooling tube (505) is externally sleeved with a magnetic attraction moving ring (508), the magnetic attraction moving ring (508) moves along with the magnetic attraction moving block (506) under the action of magnetic force, the magnetic attraction moving ring (508) is connected with a movable thermometer (509), the fixed thermometer (504) is arranged at the center of the outer wall of the converter, and the temperature of the center is measuredWhen the movable thermometer (509) is moved to be close to one of the side walls of the mounting case (501), the primary transducer temperature is measured and recorded as the edge temperature +.>Center temperature->And edge temperatureIf the protection threshold is not touched, judging the center temperature +.>And edge temperature->If the difference value is within the difference value range, the current working state is maintained, and if the difference value is within the difference value range, the flow rate of the cooling liquid is increased; when the temperature is at the centerDegree->And edge temperature->At least one of the access protection thresholds is used to increase the coolant flow rate and at the same time send a central temperature to the control module (12)>And edge temperature->As the higher of the converter temperatures.
10. The conversion system of an intelligent power module in a power storage circuit according to claim 9, wherein the side walls of the installation shell (501) are respectively provided with an installation groove (502), an electric telescopic rod (503) is installed in the installation groove (502), a contact switch is installed at the front end of the electric telescopic rod (503), the electric telescopic rod (503) stretches normally, when the contact switch contacts with the magnetic moving ring (508), the electric telescopic rod (503) stretches and retracts after a set time delay, and meanwhile, the temperature detector (509) is moved to measure the temperature, and when the contact switch downstream along the flowing direction of the cooling fluid triggers, the retracted electric telescopic rod (503) stretches and resets.
CN202311042531.2A 2023-08-18 2023-08-18 Conversion system of intelligent power module in energy storage circuit Pending CN117318137A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170222276A1 (en) * 2016-02-03 2017-08-03 Contemporary Amperex Technology Co., Limited System and method for self-isolating abnormal battery
CN116247710A (en) * 2023-03-22 2023-06-09 北京海博思创科技股份有限公司 Energy storage system early warning device and method, battery management system and energy storage system
CN116316981A (en) * 2023-03-21 2023-06-23 合肥开关厂有限公司 Control method and device of intelligent module energy storage power conversion system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170222276A1 (en) * 2016-02-03 2017-08-03 Contemporary Amperex Technology Co., Limited System and method for self-isolating abnormal battery
CN116316981A (en) * 2023-03-21 2023-06-23 合肥开关厂有限公司 Control method and device of intelligent module energy storage power conversion system
CN116247710A (en) * 2023-03-22 2023-06-09 北京海博思创科技股份有限公司 Energy storage system early warning device and method, battery management system and energy storage system

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