CN111900498A - Storage and retrieval method for fault information of battery management system - Google Patents
Storage and retrieval method for fault information of battery management system Download PDFInfo
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- CN111900498A CN111900498A CN202010619393.XA CN202010619393A CN111900498A CN 111900498 A CN111900498 A CN 111900498A CN 202010619393 A CN202010619393 A CN 202010619393A CN 111900498 A CN111900498 A CN 111900498A
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- 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
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
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- 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
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/488—Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention has disclosed the storage and search method of a battery management system trouble information, said method comprises (S1) storing battery information and control state in the historical data buffer memory at every sampling moment; (S2) judging whether the sampled data is failed, if so, continuing to execute the next step, otherwise, executing the step (S4); (S3) storing the information of the fault occurrence time and the 5 sampling moments before the fault occurrence time as fault information into a fault storage area according to classification; (S4) judging whether receiving the inquiry order, if receiving the inquiry order, continuing to execute the next step, otherwise returning to the step (S1); (S5) the system communicates with the outside through the existing conventional communication method, and when receiving the inquiry command of other devices, returns different fault information according to the inquiry command. Through the scheme, the invention achieves the purposes of comprehensively knowing fault information and having trouble retrieval when the battery system has a fault, and has very high practical value and popularization value.
Description
Technical Field
The invention belongs to the technical field of battery management systems, and particularly relates to a storage and retrieval method for fault information of a battery management system.
Background
The existing battery management system generally has an information storage function, and the common method is to store a fault code after a fault occurs in a memory, and the method has the following defects: the first deficiency is that only the fault code is saved, the current battery information and control state are not saved, and the data is incomplete; the second deficiency is that there is no battery information and control status before the failure occurs, which is inconvenient to analyze the failure reason; the third disadvantage is that the stored information needs to be searched manually, which is inconvenient for retrieval. Therefore, how to solve the defects of the prior art is a technical problem that needs to be solved urgently by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide a retrieval method for managing storage of battery system fault information, which mainly solves the problems that the fault information cannot be comprehensively known and the retrieval is troublesome when a battery system has a fault in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a storage and retrieval method for battery management system fault information comprises the following steps:
(S1) storing the battery information and the control state in the history data cache memory at each sampling time;
(S2) judging whether the sampled data is failed, if so, continuing to execute the next step, otherwise, executing the step (S4);
(S3) storing the information of the fault occurrence time and the 5 sampling moments before the fault occurrence time as fault information into a fault storage area according to classification;
(S4) judging whether receiving the inquiry order, if receiving the inquiry order, continuing to execute the next step, otherwise returning to the step (S1);
(S5) the system communicates with the outside through the existing conventional communication method, and when receiving the inquiry command of other devices, returns different fault information according to the inquiry command.
Further, the battery information and control state in the step (S1) includes current time, total battery pack pressure, charge-discharge current, cell voltage, cell temperature, relay or MOS transistor state and fault code.
Further, the data cache memory in the step (S1) is composed of 6 sub-blocks; each sub-block consists of 128 bytes for storing battery information and control status at each sampling instant.
Further, the failure information storage area in the step (S3) is divided into three sub-areas, namely a voltage failure storage area, a temperature failure storage area and a device failure storage area, each sub-area is composed of n cells, and the size of each cell is 768 bytes, that is, one cell can store the whole data cache block.
Further, the specific step of storing the fault information in the fault information storage area in the step (S3) is as follows:
(S31) when a fault occurs, the system determines the current fault type;
(S32) judging whether a voltage failure has occurred, if a voltage failure has occurred, performing the next step, otherwise, performing the step (S34);
(S33) storing data of the entire data buffer block in a voltage failure storage area of the failure information storage area in a first-in first-out manner;
(S34) judging whether a temperature failure has occurred, if a temperature failure has occurred, performing the next step, otherwise, performing the step (S36);
(S35) storing the data of the entire data cache block in the temperature failure storage area of the failure information storage area in a first-in first-out manner;
(S36) judging whether a device failure has occurred, if a device failure has occurred, executing the next step, otherwise returning to the step (S31);
(S37) the data of the entire data cache block is stored in the device failure storage area of the failure information storage area in a first-in first-out manner.
Further, the voltage faults in the step (S32) include too high cell voltage, too low cell voltage, too high total cell voltage, and too low total cell voltage.
Further, the temperature failure in the step (S34) includes a battery temperature being too high and a battery temperature being too low.
Further, the device fault in the step (S36) includes a power failure, a sampling chip fault, and a single chip microcomputer fault.
Specifically, the specific steps of receiving the query instruction in the step (S4) are as follows:
(S41) the system waits for and analyzes the query instruction sent by other equipment, wherein the query instruction comprises fault types and time information, and the fault types are divided into voltage faults, temperature faults and device faults;
(S42) determining whether a voltage fault query command is received, if so, performing the next step, otherwise, performing the step (S44);
(S43) extracting time information from the fault inquiry command, comparing the time information with the time of the battery information and the control state stored in each cell in the voltage fault storage area, if the difference value between the time information and the control state is less than 1 minute, returning the data in the cell, otherwise, returning null information;
(S44) judging whether a temperature fault inquiry command is received, if so, executing the next step, otherwise, executing the step (S46);
(S45) extracting time information from the fault inquiry command, comparing the time information with the time of the battery information and the control state stored in each cell in the temperature fault storage area, if the difference value between the time information and the control state is less than 1 minute, returning the data in the cell, otherwise, returning null information;
(S46) judging whether a device fault inquiry command is received, if so, executing the next step, otherwise, returning to the step (S41);
(S47) extracting time information from the failure inquiry command, comparing the time information with the time of the control state and the battery information saved in each cell in the device failure storage area, and returning the data in the cell if the difference between the two is less than 1 minute, otherwise returning null information.
Compared with the prior art, the invention has the following beneficial effects:
(1) the method of the invention saves the battery information and control state of 5 sampling points when and before the fault occurs, has large information amount and comprehensive data, and is convenient for analyzing the root cause of the fault; in addition, the invention stores the fault information according to time and category classification, thereby facilitating the retrieval of the fault by the working personnel.
Drawings
FIG. 1 is a flow chart of the system of the present invention.
Fig. 2 is a flowchart of storing the fault information into the fault information storage area according to the present invention.
FIG. 3 is a flow chart of the present invention for receiving a query.
FIG. 4 is a schematic structural diagram of a memory layout according to the present invention.
Detailed Description
The present invention is further illustrated by the following figures and examples, which include, but are not limited to, the following examples.
Examples
As shown in fig. 1 to 4, a method for storing and retrieving fault information of a battery management system includes the following steps:
(S1) storing battery information and control status including, but not limited to, current time (year, month, day, hour, minute, second), total battery pack pressure, charge and discharge current, cell voltage, cell temperature, associated relay or MOS transistor status and fault code in the historical data cache memory at each sampling time. And the data cache memory is composed of 6 sub-blocks; each sub-block consists of 128 bytes for storing battery information and control status at each sampling instant.
(S2) judging whether the sampled data is failed, if so, continuing to execute the next step, otherwise, executing the step (S4);
(S3) storing the information of the fault occurrence time and the 5 sampling moments before the fault occurrence time as fault information into a fault storage area according to classification; the specific steps of storing the fault information into the fault information storage area are as follows:
(S31) when a fault occurs, the system determines the current fault type;
(S32) judging whether a voltage failure has occurred, if a voltage failure has occurred, performing the next step, otherwise, performing the step (S34);
(S33) storing data of the entire data buffer block in a voltage failure storage area of the failure information storage area in a first-in first-out manner;
(S34) judging whether a temperature failure has occurred, if a temperature failure has occurred, performing the next step, otherwise, performing the step (S36);
(S35) storing the data of the entire data cache block in the temperature failure storage area of the failure information storage area in a first-in first-out manner;
(S36) judging whether a device failure has occurred, if a device failure has occurred, executing the next step, otherwise returning to the step (S31);
(S37) the data of the entire data cache block is stored in the device failure storage area of the failure information storage area in a first-in first-out manner.
The fault information storage area is divided into three subareas, namely a voltage fault storage area, a temperature fault storage area and a device fault storage area, each subarea consists of n cells, and the size of each cell is 768 bytes, namely, the whole data cache block can be stored in one cell. At each sampling moment, the battery information and control state plus a CRC16 check code are stored in 1 small block of the data cache block, when the whole data cache block is fully written, the battery information and control state at the oldest moment are discarded in a first-in first-out mode, and new battery information and control state are written in.
(S4) judging whether receiving the inquiry order, if receiving the inquiry order, continuing to execute the next step, otherwise returning to the step (S1); the specific steps for receiving the query instruction are as follows:
(S41) the system waits for and analyzes the query instruction sent by other equipment, wherein the query instruction comprises fault types and time information, and the fault types are divided into voltage faults, temperature faults and device faults;
(S42) determining whether a voltage fault query command is received, if so, performing the next step, otherwise, performing the step (S44);
(S43) extracting time information from the fault inquiry command, comparing the time information with the time of the battery information and the control state stored in each cell in the voltage fault storage area, if the difference value between the time information and the control state is less than 1 minute, returning the data in the cell, otherwise, returning null information;
(S44) judging whether a temperature fault inquiry command is received, if so, executing the next step, otherwise, executing the step (S46);
(S45) extracting time information from the fault inquiry command, comparing the time information with the time of the battery information and the control state stored in each cell in the temperature fault storage area, if the difference value between the time information and the control state is less than 1 minute, returning the data in the cell, otherwise, returning null information;
(S46) judging whether a device fault inquiry command is received, if so, executing the next step, otherwise, returning to the step (S41);
(S47) extracting time information from the failure inquiry command, comparing the time information with the time of the control state and the battery information saved in each cell in the device failure storage area, and returning the data in the cell if the difference between the two is less than 1 minute, otherwise returning null information.
(S5) the system communicates with the outside through the existing conventional communication method, and when receiving the inquiry command of other devices, returns different fault information according to the inquiry command.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, but all changes that can be made by applying the principles of the present invention and performing non-inventive work on the basis of the principles shall fall within the scope of the present invention.
Claims (9)
1. A method for storing and retrieving fault information of a battery management system is characterized by comprising the following steps:
(S1) storing the battery information and the control state in the history data cache memory at each sampling time;
(S2) judging whether the sampled data is failed, if so, continuing to execute the next step, otherwise, executing the step (S4);
(S3) storing the information of the fault occurrence time and the 5 sampling moments before the fault occurrence time as fault information into a fault storage area according to classification;
(S4) judging whether receiving the inquiry order, if receiving the inquiry order, continuing to execute the next step, otherwise returning to the step (S1);
(S5) the system communicates with the outside through the existing conventional communication method, and when receiving the inquiry command of other devices, returns different fault information according to the inquiry command.
2. The method of claim 1, wherein the battery information and control status in step (S1) includes current time, total battery voltage, charging/discharging current, cell voltage, cell temperature, relay or MOS transistor status and fault code.
3. The method for storing and retrieving failure information of battery management system as claimed in claim 2, wherein the data cache memory in the step (S1) is composed of 6 sub-blocks; each sub-block consists of 128 bytes for storing battery information and control status at each sampling instant.
4. The method for storing and retrieving failure information of battery management system as claimed in claim 3, wherein the failure information storage area in step (S3) is divided into three sub-areas of voltage failure storage area, temperature failure storage area and device failure storage area, each sub-area is composed of n cells, and each cell has a size of 768 bytes, i.e. one cell can store the whole data buffer block.
5. The method for storing and retrieving fault information of battery management system according to claim 4, wherein the step (S3) of storing the fault information into the fault information storage area comprises the following steps:
(S31) when a fault occurs, the system determines the current fault type;
(S32) judging whether a voltage failure has occurred, if a voltage failure has occurred, performing the next step, otherwise, performing the step (S34);
(S33) storing data of the entire data buffer block in a voltage failure storage area of the failure information storage area in a first-in first-out manner;
(S34) judging whether a temperature failure has occurred, if a temperature failure has occurred, performing the next step, otherwise, performing the step (S36);
(S35) storing the data of the entire data cache block in the temperature failure storage area of the failure information storage area in a first-in first-out manner;
(S36) judging whether a device failure has occurred, if a device failure has occurred, executing the next step, otherwise returning to the step (S31);
(S37) the data of the entire data cache block is stored in the device failure storage area of the failure information storage area in a first-in first-out manner.
6. The method for storing and retrieving failure information of battery management system as claimed in claim 5, wherein the voltage failure in step (S32) includes over-high cell voltage, under-low cell voltage, over-high total cell voltage and under-low total cell voltage.
7. The method for storing and retrieving fault information of battery management system according to claim 6, wherein the temperature fault in step (S34) includes over-high battery temperature and under-low battery temperature.
8. The method for storing and retrieving failure information of battery management system as claimed in claim 7, wherein the device failure in step (S36) includes power failure, sampling chip failure and one-chip microcomputer failure.
9. The method for storing and retrieving failure information of battery management system according to claim 8, wherein the step of receiving query command in step (S4) comprises the following steps:
(S41) the system waits for and analyzes the query instruction sent by other equipment, wherein the query instruction comprises fault types and time information, and the fault types are divided into voltage faults, temperature faults and device faults;
(S42) determining whether a voltage fault query command is received, if so, performing the next step, otherwise, performing the step (S44);
(S43) extracting time information from the fault inquiry command, comparing the time information with the time of the battery information and the control state stored in each cell in the voltage fault storage area, if the difference value between the time information and the control state is less than 1 minute, returning the data in the cell, otherwise, returning null information;
(S44) judging whether a temperature fault inquiry command is received, if so, executing the next step, otherwise, executing the step (S46);
(S45) extracting time information from the fault inquiry command, comparing the time information with the time of the battery information and the control state stored in each cell in the temperature fault storage area, if the difference value between the time information and the control state is less than 1 minute, returning the data in the cell, otherwise, returning null information;
(S46) judging whether a device fault inquiry command is received, if so, executing the next step, otherwise, returning to the step (S41);
(S47) extracting time information from the failure inquiry command, comparing the time information with the time of the control state and the battery information saved in each cell in the device failure storage area, and returning the data in the cell if the difference between the two is less than 1 minute, otherwise returning null information.
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