CN111900498B - 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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- 238000005070 sampling Methods 0.000 claims abstract description 15
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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
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- Microelectronics & Electronic Packaging (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The invention discloses a storage and retrieval method of battery management system fault information, which comprises the following steps of (S1) storing battery information and a control state into a historical data cache memory at each sampling moment; (S2) judging whether the sampled data has a fault, if so, continuing to execute the next step, otherwise, executing the step (S4); (S3) storing information at the time of fault occurrence and 5 sampling moments before the fault occurrence as fault information into a fault storage area according to classification; (S4) judging whether a query instruction is received, if so, continuing to execute the next step, otherwise, returning to the step (S1); and (S5) the system communicates with the outside through the conventional communication mode, and when receiving the query instruction of other equipment, returns different fault information according to the query instruction. 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 method for storing and retrieving 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 disadvantage is that the battery information and control state before the fault occurs are not stored, and the fault reason is inconvenient to analyze; 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 which 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 into a historical data cache memory at each sampling moment;
(S2) judging whether the sampled data has a fault, if so, continuing to execute the next step, otherwise, executing the step (S4);
(S3) storing information at the time of fault occurrence and 5 sampling moments before the fault occurrence as fault information into a fault storage area according to classification;
(S4) judging whether a query instruction is received, if so, continuing to execute the next step, otherwise, returning to the step (S1);
and (S5) the system communicates with the outside through the conventional communication mode, and when receiving the query instruction of other equipment, returns different fault information according to the query instruction.
Further, the battery information and control state in the step (S1) includes current time, total voltage of the battery pack, charge and discharge current, cell voltage, cell temperature, state of the relay or the MOS transistor, and a 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 fault information storage area in the step (S3) is divided into three sub-areas, namely a voltage fault storage area, a temperature fault storage area and a device fault 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 judges the current fault type;
(S32) judging whether a voltage failure occurs, if a voltage failure occurs, performing the next step, otherwise, performing the step (S34);
(S33) storing the data of the whole data cache block into a voltage fault storage area of a fault information storage area in a first-in first-out mode;
(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 whole data cache block into a temperature fault storage area of a fault information storage area in a first-in first-out mode;
(S36) judging whether a device fault occurs, if so, executing the next step, otherwise, returning to the step (S31);
(S37) the data of the entire data buffer 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 that the cell voltage is too high, the cell voltage is too low, the total battery voltage is too high, and the total battery voltage is too low.
Further, the temperature failure in the step (S34) includes that the battery temperature is too high and the battery temperature is 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 query instructions sent by other equipment, wherein the query instructions comprise fault types and time information, and the fault types comprise voltage faults, temperature faults and device faults;
(S42) judging whether a voltage fault inquiry command is received, if so, executing the next step, otherwise, executing 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 fault inquiry command, comparing the time information with the time of the battery information and the control state stored in each cell in the device 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.
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 receiving a query according to the present invention.
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 examples in conjunction with the figures and examples, and embodiments of the present invention 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 states into a historical data cache memory at each sampling moment, wherein the battery information and the control states include but are not limited to current time (year, month, day, hour, minute and second), total battery pack pressure, charge and discharge current, cell voltage, cell temperature, and related relay or MOS tube states and fault codes. 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 has a fault, if so, continuing to execute the next step, otherwise, executing the step (S4);
(S3) storing information at the time of failure and 5 sampling moments before the failure as failure information into a failure 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 judges the current fault type;
(S32) judging whether a voltage failure occurs, if a voltage failure occurs, performing the next step, otherwise, performing the step (S34);
(S33) storing the data of the whole data cache block into a voltage fault storage area of a fault information storage area in a first-in first-out mode;
(S34) judging whether a temperature fault occurs, if so, executing the next step, otherwise, executing the step (S36);
(S35) storing the data of the whole data cache block into a temperature fault storage area of a fault information storage area in a first-in first-out mode;
(S36) judging whether a device fault occurs, if so, executing the next step, otherwise, returning to the step (S31);
(S37) the data of the entire data buffer 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 sub-areas, namely a voltage fault storage area, a temperature fault storage area and a device fault storage area, each sub-area consists of n cells, the size of each cell is 768 bytes, and the whole data cache block can be stored in one cell. At each sampling moment, the battery information and control state plus CRC16 check codes 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 a query instruction is received, if so, 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 query instructions sent by other equipment, wherein the query instructions comprise fault types and time information, and the fault types comprise voltage faults, temperature faults and device faults;
(S42) judging whether a voltage fault inquiry command is received, if so, executing the next step, otherwise, executing 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 fault inquiry command, comparing the time information with the time of the battery information and the control state stored in each cell in the device 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.
And (S5) the system communicates with the outside through the conventional communication mode, and when receiving the query instruction of other equipment, returns different fault information according to the query instruction.
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 (8)
1. A method for storing and retrieving fault information of a battery management system is characterized by comprising the following steps:
(S1) storing battery information and a control state into a historical data cache memory at each sampling moment;
(S2) judging whether the sampled data has a fault, if so, continuing to execute the next step, otherwise, executing the step (S4);
(S3) storing information at the time of failure and 5 sampling moments before the failure as failure information into a failure storage area according to classification; the fault information storage area is divided into three sub-areas, namely a voltage fault storage area, a temperature fault storage area and a device fault storage area, each sub-area consists of n cells, the size of each cell is 768 bytes, and one cell can store the whole data cache block;
(S4) judging whether a query instruction is received, if so, continuing to execute the next step, otherwise, returning to the step (S1);
and (S5) the system communicates with the outside through the conventional communication mode, and returns different fault information according to the query instruction when receiving the query instruction of other equipment.
2. The method for storing and retrieving the fault information of the battery management system according to claim 1, wherein the battery information and the control status in step (S1) include a current time, a total voltage of the battery pack, a charging/discharging current, a cell voltage, a cell temperature, a state of a relay or a MOS transistor, and a 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 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 the fault information of the battery management system according to claim 3, 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 judges the current fault type;
(S32) judging whether a voltage failure occurs, if a voltage failure occurs, performing the next step, otherwise, performing the step (S34);
(S33) storing the data of the whole data cache block into a voltage fault storage area of the fault information storage area in a first-in first-out mode;
(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 whole data cache block into a temperature fault storage area of a fault information storage area in a first-in first-out mode;
(S36) judging whether a device fault occurs, if so, executing the next step, otherwise, returning to the step (S31);
(S37) the data of the entire data buffer block is stored in the device failure storage area of the failure information storage area in a first-in first-out manner.
5. The method for storing and retrieving failure information of battery management system as claimed in claim 4, wherein the voltage failure in step (S32) includes over-high cell voltage, under-low cell voltage, over-high total battery voltage and under-low total battery voltage.
6. The method for storing and retrieving fault information of battery management system according to claim 5, wherein the temperature fault in step (S34) includes over-high battery temperature and under-low battery temperature.
7. The method for storing and retrieving failure information of battery management system as claimed in claim 6, wherein the device failure in step (S36) includes power failure, sampling chip failure and one-chip microcomputer failure.
8. The method for storing and retrieving the fault information of the battery management system according to claim 7, wherein the step (S4) of receiving the query command comprises the following steps:
(S41) the system waits for and analyzes query instructions sent by other equipment, wherein the query instructions comprise fault types and time information, and the fault types comprise voltage faults, temperature faults and device faults;
(S42) judging whether a voltage fault inquiry command is received, if so, executing the next step, otherwise, executing 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 fault inquiry command, comparing the time information with the time of the battery information and the control state stored in each cell in the device 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.
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| CN114003572A (en) * | 2021-11-04 | 2022-02-01 | 珠海冠宇电源有限公司 | Battery data management method, device and equipment |
| KR20230107067A (en) * | 2022-01-07 | 2023-07-14 | 주식회사 엘지에너지솔루션 | Apparatus for battery data managing and operating method of the same |
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