CN117706434A - Fuse state detection method and device of energy storage system and energy storage system - Google Patents

Fuse state detection method and device of energy storage system and energy storage system Download PDF

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Publication number
CN117706434A
CN117706434A CN202311550567.1A CN202311550567A CN117706434A CN 117706434 A CN117706434 A CN 117706434A CN 202311550567 A CN202311550567 A CN 202311550567A CN 117706434 A CN117706434 A CN 117706434A
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CN
China
Prior art keywords
fuse
energy storage
storage system
conversion device
battery system
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
CN202311550567.1A
Other languages
Chinese (zh)
Inventor
王力
蔡兴龙
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.)
Sungrow Power Supply Co Ltd
Original Assignee
Sungrow Power Supply 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 Sungrow Power Supply Co Ltd filed Critical Sungrow Power Supply Co Ltd
Priority to CN202311550567.1A priority Critical patent/CN117706434A/en
Publication of CN117706434A publication Critical patent/CN117706434A/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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/54—Testing for continuity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/74—Testing of fuses
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H02H3/042—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned combined with means for locating the fault
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H02H3/046—Signalling the blowing of a fuse
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
    • 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
    • H02J15/00—Systems for storing electric energy
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The application discloses a fuse state detection method and device of an energy storage system and the energy storage system, and belongs to the technical field of energy storage. The energy storage system comprises a battery system and an electric energy conversion device, and the battery system is connected with the electric energy conversion device through a fuse. The method comprises the following steps: acquiring a current total voltage of the battery system and a current input voltage of the electric energy conversion device under the condition that the circuit communication between the battery system and the electric energy conversion device is determined; a current state of the fuse is determined based on the current total voltage and the current input voltage. According to the method, the state of the fuse is determined through the current total voltage of the battery system and the current input voltage of the electric energy conversion device in the energy storage system, which are obtained in real time, the state of the fuse can be fed back in time without depending on the prompting structures such as the elastic sheet of the fuse, and the circuit safety of the energy storage system is guaranteed.

Description

Fuse state detection method and device of energy storage system and energy storage system
Technical Field
The application belongs to the technical field of energy storage, and particularly relates to a fuse state detection method and device of an energy storage system and the energy storage system.
Background
In the energy storage system, a fuse is generally configured at the joint of the battery system and the electric energy conversion device, and when a short circuit fault occurs in a circuit in the energy storage system, the fuse is immediately fused, so that electrical equipment and circuits are protected from being damaged, and the accident is further prevented from being expanded.
However, at present, whether the fuse is blown or not can only be observed through observing the spring piece popped up by the fuse device, and the mode needs to be observed manually, so that the system is very inconvenient, the fuse is not blown or fails in the first time, and for the fuse device without the spring piece structure, the blowing or failure state of the fuse device cannot be detected, and potential safety hazards exist.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the method and the device for detecting the fuse state of the energy storage system and the energy storage system can timely feed back the state of the fuse without depending on prompting structures such as an elastic sheet of the fuse, and ensure the circuit safety of the energy storage system.
In a first aspect, the present application provides a method for detecting a fuse state of an energy storage system, where the energy storage system includes a battery system and an electric energy conversion device, and the battery system is connected with the electric energy conversion device through a fuse, the method includes:
acquiring a current total voltage of the battery system and a current input voltage of the electric energy conversion device under the condition that the circuit communication between the battery system and the electric energy conversion device is determined;
a current state of the fuse is determined based on the current total voltage and the current input voltage.
According to the fuse state detection method of the energy storage system, the current state of the fuse is judged by comparing the current total voltage of the battery system in the energy storage system with the current input voltage of the electric energy conversion device in real time, the current state of the fuse can be fed back in time without depending on the elastic sheet or other prompting structures of the fuse, and the circuit safety of the energy storage system is ensured.
According to one embodiment of the application, the determining the current state of the fuse based on the current total voltage and the current input voltage includes:
and determining that the fuse is in a fault state under the condition that the absolute value of the difference value between the current total voltage and the current input voltage is larger than a voltage difference value threshold value and the duration time is longer than a duration time threshold value.
According to one embodiment of the present application, the determining that the fuse is in the fault state when the absolute value of the difference between the current total voltage and the current input voltage is greater than a voltage difference threshold and the duration is greater than a duration threshold includes:
and determining that the fuse is in a blown state under the condition that the current input voltage is equal to 0.
According to one embodiment of the present application, before the obtaining the current total voltage of the battery system and the current input voltage of the power conversion device, the method further includes:
and controlling the circuit communication between the battery system and the electric energy conversion device when the circuit disconnection between the battery system and the electric energy conversion device is determined and a fuse state detection instruction is received.
According to one embodiment of the present application, the controlling the electrical circuit communication between the battery system and the electrical energy conversion device includes:
and controlling a switching device between the battery system and the electric energy conversion device to be closed.
In a second aspect, the present application provides a control method of an energy storage system, where the energy storage system includes a battery system and an electric energy conversion device, and the battery system is connected with the electric energy conversion device through a fuse, and the method includes:
acquiring the current state of the fuse, wherein the current state of the fuse is determined based on the fuse state detection method of the energy storage system in the first aspect;
in the case where it is determined that the fuse is in a failed or blown state based on the current state of the fuse, the circuit between the battery system and the power conversion device is controlled to be opened.
According to the control method of the energy storage system, the current state of the fuse is judged by comparing the current total voltage of the battery system in the energy storage system with the current input voltage of the electric energy conversion device in real time, so that the current state of the fuse can be fed back in time without depending on an elastic sheet or other prompting structures of the fuse, and the circuit safety of the energy storage system is ensured.
In a third aspect, the present application provides a fuse state detection device of an energy storage system, the energy storage system including a battery system and an electric energy conversion device, the battery system and the electric energy conversion device being connected by a fuse, the device comprising:
a first acquisition module configured to acquire a current total voltage of the battery system and a current input voltage of the electric energy conversion device, in a case where it is determined that the electric circuit between the battery system and the electric energy conversion device is in communication;
and the first processing module is used for determining the current state of the fuse based on the current total voltage and the current input voltage.
According to the fuse state detection device of the energy storage system, the current state of the fuse is judged by comparing the current total voltage of the battery system in the energy storage system and the current input voltage of the electric energy conversion device in real time, the current state of the fuse can be fed back in time without depending on the elastic sheet or other prompting structures of the fuse, and the circuit safety of the energy storage system is ensured.
In a fourth aspect, the present application provides a control device for an energy storage system, the energy storage system including a battery system and an electric energy conversion device, the battery system and the electric energy conversion device being connected by a fuse, the device comprising:
the second acquisition module is used for acquiring the current state of the fuse, and the current state of the fuse is determined based on the fuse state detection method of the energy storage system in the first aspect;
and the second processing module is used for controlling the circuit between the battery system and the electric energy conversion device to be disconnected under the condition that the fuse is determined to be in a fault or a fusing state based on the current state of the fuse.
According to the control device of the energy storage system, the current state of the fuse is judged by comparing the current total voltage of the battery system in the energy storage system and the current input voltage of the electric energy conversion device in real time, so that the current state of the fuse can be fed back in time without depending on an elastic sheet or other prompting structures of the fuse, and the circuit safety of the energy storage system is ensured.
In a fifth aspect, the present application provides an energy storage system comprising:
the battery system is connected with the electric energy conversion device through a fuse;
the energy storage system includes at least one of the fuse state detection device of the energy storage system described in the third aspect or the control device of the energy storage system described in the fourth aspect.
According to the energy storage system, the current state of the fuse is judged by comparing the current total voltage of the battery system in the energy storage system and the current input voltage of the electric energy conversion device in real time, so that the current state of the fuse can be fed back in time without depending on an elastic sheet or other prompting structures of the fuse, and the circuit safety of the energy storage system is ensured.
In a sixth aspect, the present application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor implements the method for detecting a fuse state of an energy storage system according to the first aspect or the method for controlling an energy storage system according to the second aspect when executing the computer program.
In a seventh aspect, the present application provides a non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements the method for detecting a fuse state of an energy storage system according to the first aspect or the method for controlling an energy storage system according to the second aspect.
In an eighth aspect, the present application provides a computer program product comprising a computer program which, when executed by a processor, implements the method for detecting the fuse state of an energy storage system according to the first aspect or the method for controlling an energy storage system according to the second aspect.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein:
FIG. 1 is a schematic flow chart of a method for detecting fuse states of an energy storage system according to an embodiment of the present disclosure;
FIG. 2 is a flow chart of a control method of an energy storage system according to an embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a fuse state detection device of an energy storage system according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a control device of an energy storage system according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of an energy storage system according to an embodiment of the present disclosure;
FIG. 6 is a second flowchart of a method for detecting a fuse state of an energy storage system according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Reference numerals:
the energy storage system 500, the battery system 510, the fuse 520, the switching device 530,
the power conversion device 540, the battery 511.
Detailed Description
Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application are within the scope of the protection of the present application.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The method for detecting the state of the fuse 520 of the energy storage system 500, the device 300 for detecting the state of the fuse 520 of the energy storage system 500, the electronic device and the readable storage medium provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings.
The method for detecting the state of the fuse 520 of the energy storage system 500 may be applied to a terminal, and may be specifically executed by hardware or software in the terminal.
In the method for detecting the state of the fuse 520 of the energy storage system 500 provided in the embodiment of the present application, the execution body of the method for detecting the state of the fuse 520 of the energy storage system 500 may be an electronic device or a functional module or a functional entity in the electronic device capable of implementing the method for detecting the state of the fuse 520 of the energy storage system 500.
As shown in fig. 5, the energy storage system 500 according to the embodiment of the present application includes a battery system 510 and an electric energy conversion device 540, where the battery system 510 and the electric energy conversion device 540 are connected through a fuse 520.
The battery system 510 is a system for providing electric energy to the energy storage system 500, and the battery system 510 may include a plurality of batteries 511, and the plurality of batteries 511 in the battery system 510 may be in a serial relationship.
The power conversion device 540 is a device that converts and outputs power output from the battery system 510, and the power conversion device 540 may be connected to a power grid and may transmit the converted power to the power grid.
For example, the power conversion device 540 may be an inverter that converts direct current output from the battery system 510 into alternating current output.
For another example, the power conversion device 540 may be an energy storage converter, and converts the dc power output from the battery system 510 into an ac power output.
For another example, the power conversion device 540 may be a dc converter, which converts dc power of a certain voltage level output by the battery system 510 into dc power of another voltage level.
In this embodiment, the fuse 520 is a device for protecting a circuit made of a low melting point material, such as lead-tin alloy, zinc, copper, silver, or the like.
In this embodiment, the fuse 520 is connected to a circuit between the battery system 510 and the power conversion device 540, and when the current in the circuit is excessively large, the fuse 520 is blown by overheat, thereby interrupting the current to protect the circuit from damage.
The method for detecting the state of the fuse 520 of the energy storage system 500 according to the embodiment of the present application is used for detecting the state of the fuse 520 in the energy storage system 500.
As shown in fig. 1, the method for detecting the state of the fuse 520 of the energy storage system 500 includes: step 110 and step 120.
Step 110, in the case of determining the circuit communication between the battery system 510 and the power conversion device 540, the current total voltage of the battery system 510 and the current input voltage of the power conversion device 540 are obtained.
When the circuit between the battery system 510 and the power conversion device 540 is connected, the current output by the battery system 510 may be input to the power conversion device 540, and the input terminal of the power conversion device 540 may detect the voltage.
In this embodiment, a switching device 530 may be disposed between the battery system 510 and the power conversion device 540, and the electrical circuit communication between the battery system 510 and the power conversion device 540 may be determined when the switching device 530 is closed.
In this embodiment, the current total voltage of the battery system 510 is the total voltage currently output by all the batteries 511 in the battery system 510.
For example, the battery system 510 includes a battery 511A, a battery 511B and a battery 511C,3 batteries 511 are in a series relationship, the voltage of the battery 511A is 50V, the voltage of the battery 511B is 50V, the voltage of the battery 511C is 60V, and then the current total voltage of the battery system 510 is 50V of the voltage of the battery 511A plus 50V of the voltage of the battery 511B plus 60V of the voltage of the battery 511C, and the current total voltage of the battery system 510 is 50v+50v+60v=160v.
In actual implementation, a voltage sensor may be provided at an output terminal of the battery system 510, through which the current total voltage of the battery system 510 is detected in real time.
In this embodiment, the current input voltage of the power conversion device 540 is the current voltage of the input terminal of the power conversion device 540, that is, the current total voltage of the battery system 510 is input to the power conversion device 540 after passing through the fuse 520.
In actual implementation, a voltage sensor may be disposed at an input terminal of the power conversion device 540, and a current input voltage of the power conversion device 540 may be detected in real time through the voltage sensor.
Step 120, determining the current state of the fuse 520 based on the current total voltage and the current input voltage.
The current state of the fuse 520 may be a state where the fuse 520 is blown, the fuse 520 fails, and the fuse 520 is not blown and normally provides protection for a circuit.
The failure of the fuse 520 may be represented by an increase in the resistance of the fuse 520 or by a decrease in the resistance of the fuse 520.
It will be appreciated that the battery system 510 and the power conversion device 540 are connected by the fuse 520, and the current state of the fuse 520 is different, and the difference between the current total voltage and the current input voltage is also different.
For example, when the fuse 520 is in an unblown state and normally provides protection for the circuit, the current total voltage may be approximately equal to the current input voltage, and when the fuse 520 is in a failed state, the current input voltage may be much smaller than the current total voltage or much larger than the current total voltage.
In this embodiment, the current state of the fuse 520 may be determined by comparing the value of the current total voltage and the current input voltage.
For example, when the current total voltage and the current input voltage are approximately equal, the current state of the fuse 520 may be determined to be unblown and the circuit is normally protected, and when the current total voltage and the current input voltage are greatly different, the current state of the fuse 520 may be determined to be a fault state.
According to the method for detecting the state of the fuse 520 of the energy storage system 500 provided by the embodiment of the application, the current state of the fuse 520 is judged by comparing the current total voltage of the battery system 510 in the energy storage system 500 and the current input voltage of the electric energy conversion device 540 in real time, so that the current state of the fuse 520 can be fed back in time without depending on the shrapnel or other prompting structures of the fuse 520, and the circuit safety of the energy storage system 500 is ensured.
In some embodiments, determining the current state of fuse 520 based on the current total voltage and the current input voltage includes:
in the event that the absolute value of the difference between the current total voltage and the current input voltage is greater than the voltage difference threshold and the duration is greater than the duration threshold, fuse 520 is determined to be in a fault state.
Wherein the absolute value of the difference between the current total voltage and the current input voltage characterizes the degree of gap between the current total voltage and the current input voltage.
In this embodiment, the voltage difference threshold and the duration threshold are both preset values.
The voltage difference threshold is the maximum value of the absolute value of the difference between the current total voltage and the current input voltage when the fuse 520 is not blown and normally provides protection to the circuit.
The duration threshold is the maximum duration that the absolute value of the difference between the current total voltage and the current input voltage is greater than the voltage difference threshold when the fuse 520 is not blown and is normally providing protection to the circuit.
In this embodiment, it may be determined that fuse 520 is in a fault state when the absolute value of the difference between the current total voltage and the current input voltage is simultaneously satisfied to be greater than the voltage difference threshold and the duration is greater than the duration threshold.
For example, the voltage difference threshold is set to be 10V, the duration threshold is set to be 5s, the current total voltage is obtained to be 220V, the current input voltage is obtained to be 150V, the absolute value of the difference between the current total voltage and the current input voltage is |220V-150 v|=70v, the voltage difference threshold is greater than 10V, the current total voltage and the current input voltage are obtained in real time within 5s, the absolute values of the calculated difference between the current total voltage and the current input voltage are all 70V, and the fuse 520 is determined to be in a fault state after the duration threshold is exceeded for 5 s.
For another example, the voltage difference threshold is set to be 10V, the duration threshold is set to be 5s, the current total voltage is obtained to be 220V, the current input voltage is set to be 150V, the absolute value of the difference between the current total voltage and the current input voltage is |220V-150 v|=70v, the voltage difference threshold is greater than 10V, the current total voltage is obtained to be 220V after 3s, the current input voltage is set to be 215V, the absolute value of the difference between the current total voltage and the current input voltage is |220V-215 v|=5v, and the voltage difference threshold is smaller than 10V, so that it can be determined that the fuse 520 is not in a fault state.
In some embodiments, where the absolute value of the difference between the current total voltage and the current input voltage is greater than a voltage difference threshold and the duration is greater than a duration threshold, determining that fuse 520 is in a fault state includes:
in the case where the current input voltage is equal to 0, it is determined that the fuse 520 is in the blown state.
In this embodiment, when the fuse 520 is in the blown state, the circuit between the battery system 510 and the power conversion device 540 is opened, the current output from the battery system 510 cannot be input to the power conversion device 540, and the input terminal of the power conversion device 540 cannot detect the voltage, that is, the current input voltage is equal to 0.
In this embodiment, other devices between the battery system 510 and the power conversion device 540 normally communicate with the circuit, and only the fuse 520 is blown, causing a break point in the circuit, and in the case where the current input voltage is equal to 0, it can be determined that the fuse 520 is in the blown state.
In some embodiments, prior to obtaining the current total voltage of the battery system 510 and the current input voltage of the power conversion device 540, the method further comprises:
in the case where it is determined that the circuit between the battery system 510 and the power conversion device 540 is open, and the fuse 520 state detection instruction is received, the circuit communication between the battery system 510 and the power conversion device 540 is controlled.
When the circuit between the battery system 510 and the power conversion device 540 is opened, the current output by the battery system 510 cannot be input to the power conversion device 540, and the voltage cannot be detected at the input end of the power conversion device 540.
In this embodiment, a switching device 530 may be provided between the battery system 510 and the power conversion device 540, and when the switching device 530 is turned off, it may be determined that the circuit between the battery system 510 and the power conversion device 540 is opened.
In this embodiment, the fuse 520 state detection instruction is an instruction that notifies the energy storage system 500 to perform fuse 520 state detection.
In this embodiment, fuse 520 state detection instructions may be issued manually at any time, or may be set to be issued periodically.
In actual implementation, the energy storage system 500 may comprise a control system, and the control system may control the electrical circuit communication between the battery system 510 and the power conversion device 540, and may close the switch device 530 between the battery system 510 and the power conversion device 540.
In this embodiment, after the circuit between the battery system 510 and the power conversion device 540 is communicated, the current total voltage and the current input voltage may be obtained, and the current state of the fuse 520 may be determined based on the current total voltage and the current input voltage.
In some embodiments, controlling the electrical circuit communication between the battery system 510 and the power conversion device 540 includes:
the switching device 530 between the battery system 510 and the power conversion device 540 is controlled to be closed.
The switching device 530 is a device for connecting and disconnecting a circuit between the control battery system 510 and the power conversion device 540, such as a contactor, a circuit breaker, or the like.
It will be appreciated that when the switching device 530 is closed, communication between the battery system 510 and the power conversion device 540 is established; when the switching device 530 is turned off, the battery system 510 and the power conversion device 540 are disconnected.
In actual implementation, the energy storage system 500 may comprise a control system, and the switching device 530 between the battery system 510 and the power conversion device 540 may be controlled by the control system to be closed.
The embodiment of the application also provides a control method of the energy storage system 500.
The energy storage system 500 includes a battery system 510 and an electrical energy conversion device 540, the battery system 510 and the electrical energy conversion device 540 being connected by a fuse 520.
As shown in fig. 2, the control method of the energy storage system 500 includes: step 210 and step 220.
Step 210, obtain the current state of the fuse 520.
The current state of the fuse 520 is determined based on the method for detecting the state of the fuse 520 of the energy storage system 500.
Step 220, in the case that it is determined that the fuse 520 is in a failed or blown state based on the current state of the fuse 520, controlling the circuit between the battery system 510 and the power conversion device 540 to be opened.
In this embodiment, when the fuse 520 is in a fault or blown state, a fault such as a short circuit may have occurred in the circuit, or a fault of the fuse 520 itself may cause the circuit to fail, and at this time, the circuit between the battery system 510 and the power conversion device 540 is controlled to be disconnected, i.e., the battery system 510 is disconnected from the energy storage system 500, so that a larger safety accident may be prevented.
According to the control method of the energy storage system 500 provided by the embodiment of the application, the current state of the fuse 520 is judged by comparing the current total voltage of the battery system 510 in the energy storage system 500 and the current input voltage of the electric energy conversion device 540 in real time, so that the current state of the fuse 520 can be fed back in time without depending on the shrapnel or other prompting structures of the fuse 520, and the circuit safety of the energy storage system 500 is ensured.
In the method for detecting the state of the fuse 520 of the energy storage system 500 provided in the embodiment of the present application, the execution subject may be the fuse 520 state detecting device 300 of the energy storage system 500. In this embodiment, taking the method of detecting the state of the fuse 520 of the energy storage system 500 performed by the fuse 520 state detecting device 300 of the energy storage system 500 as an example, the fuse 520 state detecting device 300 of the energy storage system 500 provided in this embodiment of the application is described.
The embodiment of the application also provides a fuse 520 state detection device 300 of the energy storage system 500.
The energy storage system 500 includes a battery system 510 and an electrical energy conversion device 540, the battery system 510 and the electrical energy conversion device 540 being connected by a fuse 520.
As shown in fig. 3, the fuse 520 state detection device 300 of the energy storage system 500 includes:
a first obtaining module 310, configured to obtain a current total voltage of the battery system 510 and a current input voltage of the power conversion device 540 in a case where a circuit communication between the battery system 510 and the power conversion device 540 is determined;
the first processing module 320 is configured to determine a current state of the fuse 520 based on the current total voltage and the current input voltage.
According to the fuse 520 state detection device 300 of the energy storage system 500 provided in the embodiment of the application, the current state of the fuse 520 is judged by comparing the current total voltage of the battery system 510 in the energy storage system 500 and the current input voltage of the electric energy conversion device 540 in real time, so that the current state of the fuse 520 can be fed back in time without depending on the shrapnel or other prompting structures of the fuse 520, and the circuit safety of the energy storage system 500 is ensured.
In some embodiments, the first processing module 320 is configured to determine that the fuse 520 is in a fault state if an absolute value of a difference between the current total voltage and the current input voltage is greater than a voltage difference threshold and the duration is greater than a duration threshold.
In some embodiments, the first processing module 320 is configured to determine that the fuse 520 is in a blown state if the current input voltage is equal to 0.
In some embodiments, the first processing module 320 is configured to control the circuit communication between the battery system 510 and the power conversion device 540 when it is determined that the circuit between the battery system 510 and the power conversion device 540 is open and a fuse 520 status detection instruction is received.
In some embodiments, the first processing module 320 is configured to control the switching device 530 between the battery system 510 and the power conversion device 540 to be closed.
The fuse 520 state detection device 300 of the energy storage system 500 in the embodiment of the present application may be an electronic device, or may be a component in an electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal or may be other devices than a terminal. By way of example, the electronic device may be a mobile phone, tablet computer, notebook computer, palm computer, vehicle-mounted electronic device, mobile internet appliance (Mobile Internet Device, MID), augmented reality (augmented reality, AR)/Virtual Reality (VR) device, robot, wearable device, ultra-mobile personal computer, UMPC, netbook or personal digital assistant (personal digital assistant, PDA), etc., but may also be a server, network attached storage (Network Attached Storage, NAS), personal computer (personal computer, PC), television (TV), teller machine or self-service machine, etc., and the embodiments of the present application are not limited in particular.
The fuse 520 state detection device 300 of the energy storage system 500 in the embodiment of the present application may be a device with an operating system. The operating system may be an Android operating system, an IOS operating system, or other possible operating systems, which are not specifically limited in the embodiments of the present application.
The fuse 520 state detection device 300 of the energy storage system 500 provided in this embodiment of the present application can implement each process implemented by the embodiment of the method of fig. 1, and for avoiding repetition, a detailed description is omitted herein.
The embodiment of the application also provides a control device 400 of the energy storage system 500.
The energy storage system 500 includes a battery system 510 and an electrical energy conversion device 540, the battery system 510 and the electrical energy conversion device 540 being connected by a fuse 520.
As shown in fig. 4, the control device 400 of the energy storage system 500 includes:
the second acquiring module 410 is configured to acquire a current state of the fuse 520, where the current state of the fuse 520 is determined based on the fuse 520 state detection method of the energy storage system 500;
the second processing module 420 is configured to control the circuit between the battery system 510 and the power conversion device 540 to be opened in a case where it is determined that the fuse 520 is in a failed or blown state based on the current state of the fuse 520.
According to the control device 400 of the energy storage system 500 provided in the embodiment of the application, the current state of the fuse 520 is judged by comparing the current total voltage of the battery system 510 in the energy storage system 500 and the current input voltage of the electric energy conversion device 540 in real time, so that the current state of the fuse 520 can be fed back in time without depending on the shrapnel or other prompting structures of the fuse 520, and the circuit safety of the energy storage system 500 is ensured.
The control device 400 of the energy storage system 500 in the embodiment of the present application may be an electronic device, or may be a component in the electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal or may be other devices than a terminal. By way of example, the electronic device may be a mobile phone, tablet computer, notebook computer, palm computer, vehicle-mounted electronic device, mobile internet appliance (Mobile Internet Device, MID), augmented reality (augmented reality, AR)/Virtual Reality (VR) device, robot, wearable device, ultra-mobile personal computer, UMPC, netbook or personal digital assistant (personal digital assistant, PDA), etc., but may also be a server, network attached storage (Network Attached Storage, NAS), personal computer (personal computer, PC), television (TV), teller machine or self-service machine, etc., and the embodiments of the present application are not limited in particular.
The control device 400 of the energy storage system 500 in the embodiment of the present application may be a device with an operating system. The operating system may be an Android operating system, an IOS operating system, or other possible operating systems, which are not specifically limited in the embodiments of the present application.
The control device 400 of the energy storage system 500 provided in the embodiment of the present application can implement each process implemented by the embodiment of the method of fig. 2, and in order to avoid repetition, a detailed description is omitted herein.
The embodiment of the application also provides an energy storage system 500.
As shown in fig. 5, the energy storage system 500 includes a battery system 510 and an electric energy conversion device 540, and the battery system 510 and the electric energy conversion device 540 are connected through a fuse 520;
the energy storage system 500 includes at least one of the fuse 520 state detection device 300 of the energy storage system 500 described above or the control device 400 of the energy storage system 500 described above.
According to the energy storage system 500 provided in the embodiment of the present application, the current state of the fuse 520 is determined by comparing the current total voltage of the battery system 510 in the energy storage system 500 and the current input voltage of the electric energy conversion device 540 in real time, so that the current state of the fuse 520 can be fed back in time without depending on the elastic sheet or other prompting structures of the fuse 520, and the circuit safety of the energy storage system 500 is ensured.
A specific embodiment of a method for detecting the state of the fuse 520 of the energy storage system 500 is described below.
As shown in fig. 6, in step one, it is determined whether the switching device 530 is closed, thereby determining whether the electric circuit between the battery system 510 and the electric power conversion device 540 is in communication.
Step two, when it is determined that the circuit between the battery system 510 and the power conversion device 540 is open, it is determined whether a fuse 520 state detection command is received, and when the fuse 520 state detection command is received, the circuit between the battery system 510 and the power conversion device 540 is controlled, that is, a switch device 530 closing command is issued.
It should be noted that, in the case that the energy storage system 500 has no fault and the switching device 530 may be normally closed, a closing instruction of the switching device 530 is issued.
Step three, in the case of determining the circuit communication between the battery system 510 and the power conversion device 540, the current total voltage of the battery system 510 is obtained as V b And the current input voltage of the power conversion device 540 is V c 。
Step four, setting the voltage difference threshold value as 10% of V b The duration threshold is 5s, and whether the condition is satisfied is judged
(|V b –V c |)÷V b ≥10％。
Step five, when meeting (|V) b –V c |)÷V b And if not less than 10%, the energy storage system 500 reports the failure of the fuse 520 and disconnects the battery system 510.
In some embodiments, as shown in fig. 7, the embodiment of the present application further provides an electronic device 700, including a processor 701, a memory 702, and a computer program stored in the memory 702 and capable of running on the processor 701, where the program when executed by the processor 701 implements the above-mentioned method for detecting the state of the fuse 520 of the energy storage system 500 or the process of the embodiment of the method for controlling the energy storage system 500, and the same technical effects can be achieved, so that repetition is avoided and no further description is given here.
The electronic device in the embodiment of the application includes the mobile electronic device and the non-mobile electronic device described above.
The embodiment of the present application further provides a non-transitory computer readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements each process of the above-mentioned method for detecting the state of the fuse 520 of the energy storage system 500 or the embodiment of the method for controlling the energy storage system 500, and can achieve the same technical effect, so that repetition is avoided, and no further description is given here.
Wherein the processor is a processor in the electronic device described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.
Embodiments of the present application also provide a computer program product, which includes a computer program that, when executed by a processor, implements the method for detecting the state of the fuse 520 of the energy storage system 500 or the method for controlling the energy storage system 500.
Wherein the processor is a processor in the electronic device described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.
The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, where the processor is configured to run a program or an instruction, implement each process of the above-mentioned method for detecting the state of the fuse 520 of the energy storage system 500 or the embodiment of the method for controlling the energy storage system 500, and achieve the same technical effect, so that repetition is avoided, and no further description is given here.
It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, chip systems, or system-on-chip chips, etc.
It should be noted that, in this document, 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. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solutions of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the methods described in the embodiments of the present application.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (12)

1. A method for detecting a fuse state of an energy storage system, the energy storage system comprising a battery system and an electrical energy conversion device, the battery system being connected to the electrical energy conversion device by a fuse, the method comprising:
acquiring a current total voltage of the battery system and a current input voltage of the electric energy conversion device under the condition that the circuit communication between the battery system and the electric energy conversion device is determined;
a current state of the fuse is determined based on the current total voltage and the current input voltage.
2. The method of claim 1, wherein the determining the current state of the fuse based on the current total voltage and the current input voltage comprises:
and determining that the fuse is in a fault state under the condition that the absolute value of the difference value between the current total voltage and the current input voltage is larger than a voltage difference value threshold value and the duration time is longer than a duration time threshold value.
3. The method of claim 2, wherein determining that the fuse is in a fault state if an absolute value of a difference between the current total voltage and the current input voltage is greater than a voltage difference threshold and a duration is greater than a duration threshold comprises:
and determining that the fuse is in a blown state under the condition that the current input voltage is equal to 0.
4. A method of detecting a fuse state of an energy storage system according to any one of claims 1-3, wherein prior to said obtaining a current total voltage of said battery system and a current input voltage of said power conversion device, said method further comprises:
and controlling the circuit communication between the battery system and the electric energy conversion device when the circuit disconnection between the battery system and the electric energy conversion device is determined and a fuse state detection instruction is received.
5. The method of claim 4, wherein said controlling the circuit communication between the battery system and the power conversion device comprises:
and controlling a switching device between the battery system and the electric energy conversion device to be closed.
6. A control method of an energy storage system, wherein the energy storage system includes a battery system and an electric energy conversion device, the battery system and the electric energy conversion device are connected through a fuse, the method comprising:
acquiring the current state of the fuse, the current state of the fuse being determined based on the fuse state detection method of the energy storage system of any one of claims 1-5;
in the case where it is determined that the fuse is in a failed or blown state based on the current state of the fuse, the circuit between the battery system and the power conversion device is controlled to be opened.
7. A fuse state detection device for an energy storage system, the energy storage system comprising a battery system and an electrical energy conversion device, the battery system and the electrical energy conversion device being connected by a fuse, the device comprising:
a first acquisition module configured to acquire a current total voltage of the battery system and a current input voltage of the electric energy conversion device, in a case where it is determined that the electric circuit between the battery system and the electric energy conversion device is in communication;
and the first processing module is used for determining the current state of the fuse based on the current total voltage and the current input voltage.
8. A control device for an energy storage system, wherein the energy storage system comprises a battery system and an electrical energy conversion device, the battery system and the electrical energy conversion device are connected through a fuse, the device comprising:
a second acquisition module for acquiring a current state of the fuse, the current state of the fuse being determined based on the method of any one of claims 1-5;
and the second processing module is used for controlling the circuit between the battery system and the electric energy conversion device to be disconnected under the condition that the fuse is determined to be in a fault or a fusing state based on the current state of the fuse.
9. An energy storage system, comprising:
the battery system is connected with the electric energy conversion device through a fuse;
the energy storage system comprises at least one of the fuse state detection device of the energy storage system of claim 7 or the control device of the energy storage system of claim 8.
10. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method for detecting the fuse state of the energy storage system according to any one of claims 1-5 or the method for controlling the energy storage system according to claim 6 when executing the program.
11. A non-transitory computer readable storage medium having stored thereon a computer program, characterized in that the computer program, when executed by a processor, implements the fuse state detection method of an energy storage system according to any one of claims 1-5 or the control method of an energy storage system according to claim 6.
12. A computer program product comprising a computer program, characterized in that the computer program, when executed by a processor, implements the method for detecting the fuse state of an energy storage system according to any one of claims 1-5 or the method for controlling an energy storage system according to claim 6.
CN202311550567.1A 2023-11-16 2023-11-16 Fuse state detection method and device of energy storage system and energy storage system Pending CN117706434A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311550567.1A CN117706434A (en) 2023-11-16 2023-11-16 Fuse state detection method and device of energy storage system and energy storage system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311550567.1A CN117706434A (en) 2023-11-16 2023-11-16 Fuse state detection method and device of energy storage system and energy storage system

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Publication Number Publication Date
CN117706434A true CN117706434A (en) 2024-03-15

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