CN109814039B - Storage battery pack open circuit detection method and device and computer readable storage medium - Google Patents
Storage battery pack open circuit detection method and device and computer readable storage medium Download PDFInfo
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Abstract
The embodiment of the invention discloses a storage battery pack open circuit detection method, a storage battery pack open circuit detection device and a computer readable storage medium.
Description
Technical Field
The present invention relates to the field of device detection technologies, and in particular, to a method and an apparatus for detecting an open circuit of a battery pack, and a computer-readable storage medium.
Background
The storage battery pack is widely applied to systems such as power plants, data centers and communication bureau stations as a backup power supply, and in practical application, along with the increase of the service life of the storage battery pack, the performance of the storage battery pack is gradually reduced, and along with the increase of the fault rate, the performance of the storage battery pack is gradually increased. And as the last line of defense of system power supply, the performance of the storage battery pack directly relates to the working stability of the system in emergency, and if the abnormity of the storage battery pack cannot be found in time, the hidden trouble of system paralysis can exist.
At present, the open circuit of the battery in the central office station can be judged only by one checking discharge test every year or one capacity test every three years, the checking discharge test of each group of batteries usually takes 3-4 hours, the capacity test takes 6-8 hours, and the testing efficiency is low. In addition, after time nodes such as a once-a-year checking discharge test or a once-a-three-year capacity test, the battery open circuit detection has a long-term idle period, so that open circuit batteries hidden in thousands of groups of batteries cannot be found in time, the open circuit batteries are easy to accumulate day by day, and a huge risk of emergency power supply interruption of the batteries exists.
Disclosure of Invention
The present invention provides a method, an apparatus, and a computer-readable storage medium for detecting an open circuit of a battery pack, which can at least solve the problems of low open circuit detection efficiency and poor instantaneity caused by performing an open circuit detection of a battery pack by using a once-a-year consistency discharge test or a once-a-year capacity test in the related art.
In order to achieve the above object, a first aspect of the embodiments of the present invention provides a method for detecting an open circuit of a battery pack, where the method includes:
when a storage battery pack to be detected supplies power to a load, detecting discharge characteristic parameters of the storage battery pack to be detected;
judging whether the discharge characteristic parameters meet a preset open circuit determination condition or not;
and when the discharge characteristic parameters meet the open-circuit determining conditions, determining that the storage battery pack to be detected has an open-circuit fault.
In order to achieve the above object, a second aspect of an embodiment of the present invention provides an apparatus for determining a location of a network device, where the apparatus includes:
the discharge detection module is used for detecting discharge characteristic parameters of the storage battery pack to be detected when the storage battery pack to be detected supplies power to a load;
the condition judgment module is used for judging whether the discharge characteristic parameters meet a preset open circuit determination condition or not;
and the open circuit determining module is used for determining that the storage battery pack to be detected has an open circuit fault when the discharge characteristic parameters meet the open circuit determining conditions.
To achieve the above object, a third aspect of embodiments of the present invention provides an electronic apparatus, including: a processor, a memory, and a communication bus;
the communication bus is used for realizing connection communication between the processor and the memory;
the processor is configured to execute one or more programs stored in the memory to implement the steps of any of the battery pack open circuit detection methods.
In order to achieve the above object, a fourth aspect of the embodiments of the present invention provides a computer-readable storage medium storing one or more programs, which are executable by one or more processors to implement the steps of any one of the battery pack open circuit detection methods.
According to the storage battery pack open circuit detection method, the storage battery pack open circuit detection device and the computer readable storage medium, when the storage battery pack to be detected supplies power to a load, the discharge characteristic parameters of the storage battery pack to be detected are detected, whether the discharge characteristic parameters meet the preset open circuit determination conditions or not is judged, and finally when the discharge characteristic parameters meet the open circuit determination conditions, the storage battery pack to be detected is determined to have an open circuit fault, so that the intelligent open circuit detection of the storage battery pack is realized, the detection efficiency is high, the detection is convenient to carry out at any time, and the instantaneity of the storage battery pack open circuit detection is improved.
Other features and corresponding effects of the present invention are set forth in the following portions of the specification, and it should be understood that at least some of the effects are apparent from the description of the present invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic basic flow chart of a battery pack open circuit detection method according to a first embodiment of the present invention;
fig. 2 is a detailed schematic flow chart of a battery pack open circuit detection method according to a second embodiment of the present invention;
fig. 3 is a schematic structural diagram of a battery pack open circuit detection device according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to a fourth embodiment of the invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment:
in order to solve the technical problems of low open circuit detection efficiency and poor instantaneity caused by performing open circuit detection on a storage battery pack by means of a checking discharge test once per year or a capacity test once in three years in the related art, the present embodiment provides a storage battery pack open circuit detection method, and as shown in fig. 1, a basic flow diagram of the storage battery pack open circuit detection method provided by the present embodiment is provided, and the storage battery pack open circuit detection method provided by the present embodiment includes the following steps:
Specifically, in this embodiment, the precondition for performing open circuit detection on the storage battery pack is that the storage battery pack needs to supply power to a load, that is, in an application scenario of this embodiment, an ac power supply that supplies power to the load in a conventional case is in an off state. In addition, in the present embodiment, the discharge characteristic parameter for determining an open circuit may be one or more of a discharge current, a discharge voltage, and the like when the battery pack is discharged, and is not limited thereto.
It should be noted that, when the discharge characteristic parameter is a discharge current, in a preferred embodiment, a specific manner of monitoring the discharge current may be: converting the primary side discharge current of the storage battery pack to be detected into a secondary side small current; and detecting the secondary side small current. In the embodiment, when the discharge current is detected, a current transformer may be used, where the current transformer is an instrument that converts a large primary-side current into a small secondary-side current for detection, the primary side of the transformer is directly connected to the high-voltage part, and the current induced by the secondary side is more suitable for detection.
In an optional implementation manner of this embodiment, before the battery pack to be detected supplies power to the load, the method further includes: judging whether the current time is far from the time when the storage battery pack to be detected supplies power to the load last time and the preset detection duration is reached; and if the preset detection duration is reached, controlling the AC power supply to be disconnected, and supplying power to the load by the storage battery pack to be detected.
Specifically, in practical applications, the trigger mechanism of the storage battery pack for supplying power to the load is different, in one case, the storage battery pack may be automatically triggered to supply power to the load when the ac power supply fails, and in another case, the storage battery pack may be triggered to supply power to the load when a technician manually disconnects the ac power supply to perform problem troubleshooting of the power supply system at a specific time node. In the preferred embodiment, in order to make up for the deficiency of the frequency of the once-a-year consistency test or the once-a-three-year capacity test of the storage battery to the maximum extent, especially the emergency power supply capability of the storage battery in important scenes such as major holidays and typhoons, a specific implementation mode for triggering the storage battery to supply power to a load according to the preset detection duration is provided in the embodiment, so that an open circuit detection environment is created, the breakdown of a power supply system caused by the fact that the storage battery is already open-circuited when the open circuit detection of the storage battery is triggered due to the fault of an alternating current power supply can be overcome, and the open circuit detection of the storage battery is triggered when the alternating current power supply is periodically disconnected for power supply system inspection, so that the method has higher flexibility and instantaneity. It should be noted that the interval duration of triggering the storage battery pack to supply power to the load in this embodiment may be any duration, and is not limited to that the interval duration of each time is equal, and may be determined according to the actual use requirement.
In an optional implementation manner of this embodiment, detecting the discharge characteristic parameter of the battery pack to be detected includes: detecting the discharge characteristic parameters of the storage battery pack to be detected at a first moment; and if the discharge characteristic parameters detected at the first moment meet the preset open circuit determination conditions, detecting the discharge characteristic parameters of the storage battery pack to be detected again at a second moment, wherein the second moment and the first moment are separated by a preset time length.
Specifically, in practical application, there may be an accidental factor or unstable operation of the test module, which may cause a large error in a single detection result, and based on this, a secondary detection implementation is proposed in this embodiment, that is, when an open circuit is determined by performing open circuit judgment on the discharge characteristic parameter detected for the first time, the result is not directly output, but the discharge characteristic parameter is detected again at preset intervals, so as to eliminate an accidental error caused by the primary detection, and improve the accuracy of the detection result.
And 102, judging whether the discharge characteristic parameters meet a preset open circuit determination condition.
Specifically, in the present embodiment, whether the battery pack is open-circuited is determined according to the detected discharge behavior of the battery pack, in the case of an open circuit, the discharge behavior exhibited by the battery pack has a certain regularity, and the regularity generally exhibited may be various, and is not limited to a unique condition for determining an open circuit. It should be noted that, corresponding to the above-mentioned secondary detection, the secondary judgment should be performed on the discharge characteristic parameters detected twice correspondingly here.
In an optional implementation manner of this embodiment, in this embodiment, taking the discharge characteristic parameter as the discharge current as an example, the specific open-circuit determination condition may include the following two conditions: firstly, the discharge current is less than or equal to a preset current threshold value; and secondly, the absolute value of the difference between the discharging current and the average discharging current of the storage battery pack system to which the storage battery pack to be detected belongs is larger than or equal to a preset difference threshold.
Specifically, for the first case, when a potential open-circuit hidden danger occurs in the storage battery pack or an open-circuit fault has occurred in the storage battery pack, the discharge current of the storage battery pack is usually reduced relatively to the normal case, so that when the established current critical threshold is reasonable, the discharge current of the storage battery pack below the current critical threshold can relatively accurately represent that the current storage battery pack has an open-circuit fault. It should be further noted that, in practical applications, usually, a plurality of battery packs are used in a battery pack system, in this embodiment, the current threshold may be determined according to an average discharge current I of all battery packs in the current battery pack system, where the calculation formula of I is: i ═ I (I) 1 +I 2 +…+I N ) N, wherein I N Is the actual discharge current of the nth group of battery packs and, based on the actual working experience of the technician, the current threshold may be I/4.
In addition, in the second case, the difference between the discharge current of the storage battery pack is determined, specifically, the absolute value of the difference between the discharge current of the current storage battery pack to be monitored and the average discharge current of the storage battery pack system is compared with a preset difference threshold, and when the storage battery pack has an open-circuit hidden danger or has an open circuit, the difference between the discharge current of the storage battery pack and the average discharge current is relatively large, so that when the absolute value of the difference exceeds a critical value, it can be determined that the storage battery pack has an open circuit hidden danger or has an open circuitWhen the open-circuit fault occurs in the battery pack, the calculation formula can be expressed as follows: i N -I | ≧ P, wherein I N The actual discharge current of the Nth group of storage battery pack is I is the average discharge current of all storage battery packs in the storage battery pack system, and P is a preset difference threshold.
In an optional implementation manner of this embodiment, the difference threshold is a product of the average discharge current and a preset difference coefficient.
Specifically, in the present embodiment, the set difference threshold is related to the average discharge current of the battery system in which the battery is located, that is, the difference thresholds used when performing open-circuit judgment on the battery to be detected in different battery systems are different. It should be noted that the difference coefficient here is a weighting factor of the average discharge current, and may be a constant amount or a variable amount in practical application. The calculation formula in this embodiment can be expressed as follows based on the above embodiment: i N -I | ≧ I η, where η is the coefficient of variation.
In an alternative embodiment of the present embodiment, the difference coefficient is positively correlated to the discharge current of the battery pack to be tested.
Specifically, in order to reduce an error in the open circuit judgment and improve the accuracy of the open circuit detection, in this embodiment, when the discharge current of the battery pack to be detected is relatively small, the obtained difference coefficient is small, and when the discharge current of the battery pack to be detected is large, the difference coefficient is correspondingly large, as shown in table 1, the mapping table of the discharge current and the difference coefficient provided by the present embodiment is provided.
TABLE 1
And 103, determining that the storage battery pack to be detected has an open circuit fault when the discharge characteristic parameters meet the open circuit determination conditions.
Specifically, in this embodiment, the open-circuit fault is mainly embodied in two forms, one is that an open circuit has been generated, and the other is that an open-circuit hidden danger is provided. It should be noted that, corresponding to the specific implementation manner of the secondary detection and secondary judgment in the foregoing embodiment, it is correspondingly determined that the battery pack to be detected has an open-circuit fault when the discharge characteristic parameter detected at the second time meets the open-circuit determination condition.
In addition, it should be noted that, in practical application, after it is determined that an open-circuit fault occurs in the storage battery pack, a detection result may be further output for reference by a technician to make a suitable solution in time; it should also be understood that in practical applications, the detection may be performed on a plurality of battery packs in a plurality of battery pack systems simultaneously or sequentially, and after the detection is completed on each of the plurality of battery packs, the data may be summarized and analyzed, and then the overall detection result may be generated and output.
According to the storage battery pack open circuit detection method provided by the embodiment of the invention, when the storage battery pack to be detected supplies power to a load, the discharge characteristic parameter of the storage battery pack to be detected is detected, whether the discharge characteristic parameter meets the preset open circuit determination condition is judged, and finally, when the discharge characteristic parameter meets the open circuit determination condition, the storage battery pack to be detected is determined to have an open circuit fault, so that the intelligent open circuit detection of the storage battery pack is realized, the detection efficiency is high, the detection is conveniently carried out at any time, and the instantaneity of the storage battery pack open circuit detection is improved.
The second embodiment:
in order to more intuitively understand the method for detecting an open circuit of a storage battery pack in the embodiment of the present invention, an embodiment of the present invention further provides a detailed method for detecting an open circuit of a storage battery pack, as shown in fig. 2, which is a detailed schematic flow diagram of the method for detecting an open circuit of a storage battery pack provided in the present embodiment, and the method for detecting an open circuit of a storage battery pack provided in the present embodiment includes the following steps:
the embodiment provides a specific implementation mode for triggering the storage battery pack to supply power to the load according to the preset detection duration to create an open-circuit detection environment, so that the breakdown of a power supply system caused by the fact that the storage battery pack is opened when the open-circuit detection of the storage battery pack is triggered due to the fault of the alternating-current power supply can be overcome, and the method has higher flexibility and instantaneity compared with the method for triggering the open-circuit detection of the storage battery pack when the alternating-current power supply is periodically disconnected for power supply system examination.
in this embodiment, a current transformer may be used to detect the discharge current, specifically, a large primary-side current is converted into a small secondary-side current. In addition, the open-circuit determination condition in the present embodiment may include the following two: firstly, the discharge current is less than or equal to a preset current threshold value; and secondly, the absolute value of the difference between the discharge current and the average discharge current of the storage battery pack system to which the storage battery pack to be detected belongs is greater than or equal to a preset difference threshold. Further, the difference threshold may be a product of an average discharge current of the battery system to which the battery to be detected belongs and a preset difference coefficient, and the difference coefficient may be a fixed value or a variable positively correlated to the discharge current of the battery to be detected.
the realization mode of secondary detection is passed through to this embodiment, is favorable to eliminating the contingency error that once detects and brings, improves the accuracy of testing result. It should be noted that the open-circuit fault in this embodiment is mainly embodied in two forms, one is that an open circuit has been generated, and the other is that an open-circuit hidden trouble is provided
And step 206, outputting an open circuit detection result.
According to the method for detecting the open circuit of the storage battery pack, the storage battery pack to be detected is triggered to supply power to a load at intervals of preset detection time, when the discharge current detected at the first moment meets the preset open circuit determination condition, the discharge current is detected again at the second moment at intervals of the preset time, open circuit judgment is performed again, and when the discharge current judgment is performed again and the open circuit determination condition is still met, the storage battery pack to be detected is determined to have an open circuit fault.
Second embodiment:
in this embodiment, a storage battery pack open circuit detection device is shown, specifically referring to fig. 3, in order to solve the technical problems of low open circuit detection efficiency and poor instantaneity caused by performing an open circuit detection on a storage battery pack by using a once-a-year checkup discharge test or a once-a-three-year capacity test in the prior art, the storage battery pack open circuit detection device of this embodiment includes:
the discharge detection module 301 is configured to detect a discharge characteristic parameter of the battery pack to be detected when the battery pack to be detected supplies power to a load;
a condition determining module 302, configured to determine whether the discharge characteristic parameter meets a preset open-circuit determining condition;
and the open circuit determining module 303 is configured to determine that an open circuit fault occurs in the battery pack to be detected when the discharge characteristic parameter meets an open circuit determining condition.
Specifically, the precondition for performing open circuit detection on the storage battery pack is that the storage battery pack needs to supply power to a load, that is, in the application scenario of this embodiment, an ac power supply that supplies power to the load is in a disconnected state in a conventional case. In addition, in the present embodiment, the discharge characteristic parameter for determining an open circuit may be one or more of a discharge current, a discharge voltage, and the like when the battery pack is discharged, and is not limited thereto. In addition, in the present embodiment, the open-circuit fault is mainly embodied in two forms, one is that an open circuit has been generated, and the other is that an open-circuit hidden danger is provided.
In some embodiments of this embodiment, the battery pack open circuit detection device further includes: the power supply control module is used for judging whether the current time is away from the time when the storage battery pack to be detected supplies power to the load last time and the preset detection time is reached; and if the preset detection duration is reached, controlling the AC power supply to be disconnected, and supplying power to the load by the storage battery pack to be detected.
In some embodiments of the present embodiment, the discharge detection module 301 is specifically configured to detect a discharge characteristic parameter of the battery pack to be detected at a first time; and if the discharge characteristic parameters detected at the first moment meet the preset open-circuit determination conditions, detecting the discharge characteristic parameters of the storage battery pack to be detected again at a second moment, wherein the second moment and the first moment are separated by a preset time length. Correspondingly, the open-circuit determining module 303 is specifically configured to determine that an open-circuit fault occurs in the storage battery pack to be detected when the discharge characteristic parameter detected at the second time meets the open-circuit determining condition.
In some embodiments of the present embodiment, when the discharge characteristic parameter is a discharge current, the discharge detection module 301 is specifically configured to convert a primary side discharge current of the battery pack to be detected into a secondary side small current when the battery pack to be detected supplies power to a load; and detecting the secondary side small current.
In some embodiments of this embodiment, when the discharge characteristic parameter is a discharge current, the condition determining module 302 is specifically configured to determine whether the discharge current is less than or equal to a preset current threshold; or judging whether the absolute value of the difference between the discharging current and the average discharging current of the storage battery set system to which the storage battery set to be detected belongs is larger than or equal to a preset difference threshold value. Further, in other embodiments of this embodiment, the difference threshold is a product of the average discharge current and a preset difference coefficient. Further, the coefficient of variation is positively correlated with the discharge current.
It should be noted that, the battery pack open circuit detection methods in the first and second embodiments can be implemented based on the battery pack open circuit detection device provided in this embodiment, and it can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working process of the battery pack open circuit detection device described in this embodiment may refer to the corresponding process in the foregoing method embodiment, and details are not described here.
By adopting the storage battery pack open circuit detection device provided by the embodiment, when the storage battery pack to be detected supplies power to a load, the discharge characteristic parameter of the storage battery pack to be detected is detected, whether the discharge characteristic parameter accords with the preset open circuit determination condition is judged, and finally, when the discharge characteristic parameter accords with the open circuit determination condition, the storage battery pack to be detected is determined to have an open circuit fault, so that the intelligent open circuit detection of the storage battery pack is realized, the detection efficiency is high, the detection is conveniently carried out at any time, and the instantaneity of the open circuit detection is improved.
The third embodiment:
the present embodiment provides an electronic device, as shown in fig. 4, which includes a processor 401, a memory 402, and a communication bus 403, wherein: the communication bus 403 is used for realizing connection communication between the processor 401 and the memory 402; the processor 401 is configured to execute one or more computer programs stored in the memory 402 to implement at least one step of the battery pack open circuit detection method in the first and/or second embodiments.
The present embodiments also provide a computer-readable storage medium including volatile or non-volatile, removable or non-removable media implemented in any method or technology for storage of information such as computer-readable instructions, data structures, computer program modules or other data. Computer-readable storage media include, but are not limited to, RAM (Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), flash Memory or other Memory technology, CD-ROM (Compact disk Read-Only Memory), Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer.
The computer-readable storage medium in this embodiment may be used for storing one or more computer programs, and the stored one or more computer programs may be executed by a processor to implement at least one step of the method in the above-mentioned embodiment one and/or two.
The present embodiment also provides a computer program, which can be distributed on a computer readable medium and executed by a computing device to implement at least one step of the method in the first and/or second embodiment; and in some cases at least one of the steps shown or described may be performed in an order different than that described in the embodiments above.
The present embodiments also provide a computer program product comprising a computer readable means on which a computer program as shown above is stored. The computer readable means in this embodiment may include a computer readable storage medium as shown above.
It will be apparent to those skilled in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software (which may be implemented in computer program code executable by a computing device), firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit.
In addition, communication media typically embodies computer readable instructions, data structures, computer program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to one of ordinary skill in the art. Thus, the present invention is not limited to any specific combination of hardware and software.
The foregoing is a more detailed description of embodiments of the present invention, and the present invention is not to be considered limited to such descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (7)
1. A method for detecting an open circuit in a battery pack, comprising:
when a storage battery pack to be detected supplies power to a load, detecting discharge characteristic parameters of the storage battery pack to be detected;
judging whether the discharge characteristic parameters meet a preset open circuit determination condition or not; wherein, when the discharge characteristic parameter is a discharge current, the open-circuit determination condition includes: the absolute value of the difference between the discharge current and the average discharge current of the storage battery system to which the storage battery pack to be detected belongs is not smaller than a preset difference threshold; the calculation formula involved in the open-circuit determination condition includes | I N -I|≥I*η，I N The actual discharge current of the Nth group of storage battery pack is obtained, I is the average discharge current of all storage battery packs in the storage battery pack system, eta is a difference coefficient, the difference threshold is the product of the average discharge current and a preset difference coefficient, and the difference coefficient is positively correlated with the discharge current;
and when the discharge characteristic parameters meet the open-circuit determining conditions, determining that the storage battery pack to be detected has an open-circuit fault.
2. The battery pack open circuit detection method according to claim 1, further comprising, before the battery pack to be detected supplies power to the load:
judging whether the current time is far from the time when the storage battery pack to be detected supplies power to the load last time and the preset detection duration is reached;
and if the preset detection duration is reached, controlling the AC power supply to be disconnected, and supplying power to the load by the storage battery pack to be detected.
3. The battery pack open circuit detection method according to claim 1, wherein the detecting of the discharge characteristic parameter of the battery pack to be detected includes:
detecting the discharge characteristic parameters of the storage battery pack to be detected at a first moment;
if the discharge characteristic parameters detected at the first moment meet the preset open circuit determination condition, detecting the discharge characteristic parameters of the storage battery pack to be detected again at a second moment, wherein the second moment and the first moment are separated by a preset time length;
when the discharge characteristic parameter meets the open-circuit determination condition, determining that the storage battery pack to be detected has an open-circuit fault includes:
and when the discharge characteristic parameters detected at the second moment meet the open-circuit determining conditions, determining that the storage battery pack to be detected has an open-circuit fault.
4. The battery pack open circuit detection method according to claim 1, wherein when the discharge characteristic parameter is a discharge current, the detecting the discharge characteristic parameter of the battery pack to be detected includes:
converting the primary side discharge current of the storage battery pack to be detected into a secondary side small current;
and detecting the secondary side small current.
5. A battery pack open circuit detection device, comprising:
the discharge detection module is used for detecting discharge characteristic parameters of the storage battery pack to be detected when the storage battery pack to be detected supplies power to a load;
the condition judgment module is used for judging whether the discharge characteristic parameters meet a preset open circuit determination condition or not; wherein, when the discharge characteristic parameter is a discharge current, the open-circuit determination condition includes: the absolute value of the difference between the discharge current and the average discharge current of the storage battery system to which the storage battery pack to be detected belongs is not smaller than a preset difference threshold; the calculation formula involved in the open-circuit determination condition includes | I N -I|≥I*η，I N The actual discharge current of the Nth group of storage battery pack is obtained, I is the average discharge current of all storage battery packs in the storage battery pack system, eta is a difference coefficient, and the difference coefficient is positively correlated with the discharge current;
and the open circuit determining module is used for determining that the storage battery pack to be detected has an open circuit fault when the discharge characteristic parameters meet the open circuit determining conditions.
6. An electronic device, comprising: a processor, a memory, and a communication bus;
the communication bus is used for realizing connection communication between the processor and the memory;
the processor is configured to execute one or more programs stored in the memory to implement the steps of the battery pack open circuit detection method according to any one of claims 1 to 4.
7. A computer readable storage medium, characterized in that the computer readable storage medium stores one or more programs which are executable by one or more processors to implement the steps of the battery pack open circuit detection method according to any one of claims 1 to 4.
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| CN109814039A (en) | 2019-05-28 |
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