CN112068008B - Multi-sensor testing system and method for lithium battery thermal runaway detection - Google Patents
Multi-sensor testing system and method for lithium battery thermal runaway detection Download PDFInfo
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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]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/38—Services specially adapted for particular environments, situations or purposes for collecting sensor information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0002—Serial port, e.g. RS232C
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0042—Universal serial bus [USB]
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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 MCU of the main control module distributes a fixed uniform format identifier to each sensor interface, and when the main control circuit board is connected with the sensor module, the uploaded sensing data contains the identifier of the sensor connection interface, and the sensing data are distinguished according to the identifier; judging the type of a data processing algorithm method adopted by the data analysis module according to the type of the sensing data, and processing the sensing data according to a selected data processing algorithm, wherein the data processing algorithm comprises normalization, filtering and unit unification; and carrying out graphical or tabular processing on the processed sensing data, and outputting and displaying the processing result according to an output form preset by a user. The invention has good universality, can be suitable for testing various common sensors used in the development of lithium battery thermal runaway detection products, and can avoid the problem that the consistency cannot be ensured due to the fact that different sensors need to be tested by a separate development system and testing conditions.
Description
Technical Field
The invention belongs to the technical field of lithium batteries, and particularly relates to a multi-sensor testing system and method for detecting thermal runaway of a lithium battery.
Background
In the product development process of the existing lithium battery thermal runaway sensor application, the sensor is indispensable to the test of the sensor. In particular, the sensor of the new model, though the manufacturer can provide technical manual and other data, and can obtain a great amount of information about the performance parameters of the sensor through the technical manual, but the information which can be given by the manual is very limited, most of the data in the manual is based on the test result given by the conventional environment, and is not a sensor specially developed for the thermal runaway of the lithium battery, so the detection requirement of the thermal runaway state of the lithium battery cannot be directly obtained.
The current scheme is basically to design a set of software and hardware system aiming at the standby sensor, and part of the system also relates to the design of structural components. After the design of the system is finished, if the system is normal in function, the test requirement of the sensor of the model can be basically met. However, if new model numbers or other types of sensors are required to be tested, the system is often not satisfactory, resulting in the need to re-develop the system for testing. Thus, great waste is caused in development cost and development period.
At present, because the output signals of the sensor are in analog signal form and digital signal form, the digital signals are divided into a plurality of interface forms, the voltages required by the operation of the sensor are different, and the signals output by the sensor need to be acquired and analyzed, and the sensor can be tested only by supporting a signal conversion and acquisition system. For collection, storage and processing of test data, the existing system has different data storage modes and storage formats because of no unified standard, so that the test cost is increased intangibly, the comparison test of similar sensors is not facilitated, and the requirement on the consistency of the test environment is increased. It is also difficult to process the data using a consistent algorithm and it is difficult to compare different types of measurement data, even different batches of the same type.
In addition, lithium battery thermal runaway tests tend to be destructive and irreversible, so testing has to strive for the diversity and validity of single measurement data.
In summary, the repeated construction of the traditional sensor test for thermal runaway of the lithium battery causes resource waste; the test environment is high in consistency and repeatability difficulty; the repeatability and the contrast difficulty of the test data are high; and the defects of complex test data centralized processing and evaluation and the like. There is a need for a multi-sensor test solution for thermal runaway detection of lithium batteries.
Disclosure of Invention
Therefore, the multi-sensor testing system and method for lithium battery thermal runaway detection provided by the invention have good universality, can adapt to testing of various common sensors used for development of lithium battery thermal runaway detection products, and avoid the problem that the consistency cannot be ensured due to the fact that different sensors need to be independently developed for testing systems and testing conditions.
In order to achieve the above object, the present invention provides the following technical solutions: a multisensor test system for lithium cell thermal runaway detection, includes main control module, power module, sensor module, communication module and data analysis module: the system comprises a main control module, a sensor module, a communication module, a data analysis module, a power supply module, a communication module and a data analysis module, wherein the main control module and the power supply module are connected, the sensor module and the main control module are connected, the communication module and the main control module are connected, and the data analysis module and the communication module are connected; wherein:
the main control module is used for controlling and driving the sensor and collecting data of the sensor;
the power supply module is used for supplying power to the main control module;
the sensor module is used for power supply control and level conversion of the sensor;
the communication module is used for uploading the acquired data of the sensor module received by the main control module;
the data analysis module is used for storing, processing and outputting the acquired data uploaded by the communication module;
the main control module is integrated on a main control circuit board, and the main control circuit board is provided with an analog interface, a digital interface and a power supply communication interface; the sensor module is integrated on a sensor circuit board, and the analog interface and the digital interface are connected with the sensor circuit board; the data analysis module is configured with an upper computer;
the main control circuit board performs level conversion on sensor interfaces of different digital interfaces; the main control circuit board supplies power to the sensor circuit board; the MCU of the main control circuit board completes system initialization, the sensor module outputs sensing data under the responsive test condition, the sensing data is collected and processed by the MCU of the main control circuit board and then uploaded to the CAN-to-USB device through the power communication interface, and the sensing data is uploaded to the PC terminal through the CAN-to-USB device and stored in the PC terminal in the format of original data.
As a preferred solution of the multi-sensor test system for lithium battery thermal runaway detection, the analog interface includes analog input lines ach+ and ACH-; the digital interface comprises an IIC interface, a UART interface, an SPI interface and an RS485 interface.
As a preferred embodiment of the multi-sensor test system for lithium battery thermal runaway detection, the processing of the data analysis module includes normalization, filtering, unit unification, diagrammatization and tabulation processing of the sensing data.
As a preferred scheme of the multi-sensor testing system for lithium battery thermal runaway detection, IO expansion is carried out on the main control circuit board, wherein the IO expansion comprises a USB (universal serial bus) serial port, a download debugging interface and a data printing interface; the USB-to-serial port is used for transmitting sensing data to the PC end through the USB port; the download debugging interface is used for bottom layer driving debugging of the main control circuit board MCU; the data printing interface is used for collecting test data in a serial port printing mode.
The invention also provides a multi-sensor testing method for detecting the thermal runaway of the lithium battery, which adopts the multi-sensor testing system for detecting the thermal runaway of the lithium battery and comprises the following steps:
the MCU of the main control module distributes a fixed uniform format identifier to each sensor interface, and when the main control circuit board is connected with the sensor module, the uploaded sensing data contains the identifier of the sensor connection interface, and the sensing data is subjected to data discrimination according to the identifier;
judging the type of a data processing algorithm method adopted by a data analysis module according to the type of the sensing data, and processing the sensing data according to a selected data processing algorithm, wherein the data processing algorithm comprises normalization, filtering and unit unification;
and carrying out graphical or tabular processing on the processed sensing data, and outputting and displaying the processing result according to an output form preset by a user.
As a preferable scheme of the multi-sensor testing method for lithium battery thermal runaway detection, the end of 16-system sensing data after analog-to-digital conversion by a main control circuit board is added with a mark of analog conversion data.
As a preferred scheme of the multi-sensor testing method for lithium battery thermal runaway detection, the data threshold is set for the analog conversion data to normalize, and when the data is higher or lower than the threshold and exceeds the set data threshold, filtering processing is carried out; the filtering processing mode is as follows: and summing the normal data acquired by the previous bit and the next bit and then averaging the sum to serve as the replacement data of the abnormal data.
As a preferable scheme of the multi-sensor testing method for lithium battery thermal runaway detection, collected binary and decimal digital signal data are uniformly converted into 16-system sensing data.
As a preferred scheme of the multi-sensor testing method for lithium battery thermal runaway detection, the digital signal data is normalized by setting a data threshold, and when the data is higher or lower than the threshold and exceeds the set data threshold, filtering is carried out; the filtering processing mode is as follows: and summing the normal data acquired by the previous bit and the next bit and then averaging the sum to serve as the replacement data of the abnormal data.
As a preferred scheme of the multi-sensor testing method for lithium battery thermal runaway detection, the processing result output is displayed and compared according to an output form preset by a user, and the comparison mode comprises the following steps: comparing test result data according to the type of the sensor; and comparing the test result data according to the time dimension.
The technical scheme of the invention has extremely high universality, can be adapted to various sensor interfaces, needs to add new types of sensor tests, only needs to develop corresponding circuit boards aiming at the sensors, and is convenient for welding the sensors and realizing the conversion of special voltages required by the sensors; the data acquisition and processing are performed in a unified mode, the unified data operation is realized through an algorithm, the test result of each sensor can be visually compared, the system can call out the previous test result if necessary, and the comparison analysis is performed with the current result, so that optimization and improvement suggestions are provided for the test process; development cost is saved, and product development period is shortened; the method is convenient for uniformly processing and analyzing the data of a plurality of sensors tested simultaneously, and the result contrast is more obvious.
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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 will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
FIG. 1 is a diagram of a multi-sensor test system architecture for lithium battery thermal runaway detection provided in an embodiment of the present invention;
FIG. 2 is a schematic diagram of a multi-sensor testing system for thermal runaway detection of lithium batteries according to an embodiment of the present invention;
FIG. 3 is a flowchart of the multi-sensor testing system for lithium battery thermal runaway detection provided in an embodiment of the present invention;
fig. 4 is a flow chart of data processing in a multi-sensor test for thermal runaway detection of a lithium battery provided in an embodiment of the invention.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 and 2, a multi-sensor testing system for thermal runaway detection of a lithium battery is provided, which comprises a main control module 1, a power supply module 2, a sensor module 3, a communication module 4 and a data analysis module 5: a connection relationship is established between the main control module 1 and the power supply module 2, a connection relationship is established between the sensor module 3 and the main control module 1, a connection relationship is established between the communication module 4 and the main control module 1, and a connection relationship is established between the data analysis module 5 and the communication module 4; wherein:
the main control module 1 is used for controlling and driving the sensor and collecting the data of the sensor;
the power supply module 2 is used for supplying power to the main control module 1;
a sensor module 3 for power supply control and level conversion of the sensor;
the communication module 4 is used for uploading the acquired data of the sensor module 3 received by the main control module 1;
the data analysis module 5 is used for storing, processing and outputting the acquired data uploaded by the communication module 4;
the main control module 1 is integrated on a main control circuit board 6, and the main control circuit board 6 is provided with an analog interface, a digital interface and a power supply communication interface; the sensor module 3 is integrated on the sensor circuit board 7, and the analog interface and the digital interface are connected with the sensor circuit board 7; the data analysis module 5 is configured with an upper computer;
the main control circuit board 6 performs level conversion on sensor interfaces of different digital interfaces; the main control circuit board 6 supplies power to the sensor circuit board 7; the MCU of the main control circuit board 6 completes system initialization, the sensor module 3 outputs sensing data under the responsive test condition, the sensing data is collected and processed by the MCU of the main control circuit board 6 and then uploaded to the CAN-to-USB device through the power communication interface, and the sensing data is uploaded to the PC 8 upper computer through the CAN-to-USB device and stored to the PC 8 in the format of original data.
With additional reference to FIG. 2, in one embodiment of a multi-sensor test system for lithium battery thermal runaway detection, the analog interface includes analog input lines ACH+ and ACH-; the digital interface comprises an IIC interface, a UART interface, an SPI interface and an RS485 interface. The analog interface and the digital interface of the main control circuit board 6 are connected with the sensor circuit board 7, so that the testing of eight paths of analog signal sensors, five paths of IIC sensors, one path of UART interface sensors, one path of SPI interface sensors and one path of RS485 interface sensors can be simultaneously realized. The main control circuit board 6 performs level conversion aiming at different digital interface sensor interfaces, and meets the level requirement of the MCU interface of the main control circuit board 6. After the sensor circuit board 7 is connected with the main control circuit board 6, the main control circuit board 6 supplies power to the sensor circuit board 7, under specific test conditions, the MCU of the main control circuit board 6 completes system initialization, the sensor outputs data under the responsive test conditions, the data is collected and processed by the MCU, then the data is sent to a power communication interface, uploaded to a CAN USB device, finally uploaded to a PC 8 upper computer through the CAN USB device, and the data is saved to the PC 8 in the format of original data.
With additional reference to fig. 3, in one embodiment of a multi-sensor testing system for lithium battery thermal runaway detection, the processing of the data analysis module 5 includes normalization, filtering, unit unification, diagramming, and tabulating of the sensed data. After the data acquisition is completed, the data analysis module 5 can perform unified processing on the sensing data, including normalization, filtering algorithm, unit unification, diagrammatization, tabular and the like. After the data analysis processing is completed, the output result can directly reflect various indexes detected in the thermal runaway process of the sensor, and the final conclusion of the type selection of the sensor can be intuitively obtained.
Specifically, the MCU chip of the main control circuit board 6 will assign a fixed uniform format identifier to each sensor interface, and after the main control circuit board 6 connects with the sensors, the uploaded data will include the identifiers of the sensor connection interfaces, and the data is distinguished according to the identifiers, so that the data corresponds to the sensors.
Because the uploaded data is 16-system data after analog-to-digital conversion of the main control circuit board 6 in the case of an analog sensor, a special mark of the analog conversion data is added at the end of the data. In the case of data uploaded by a digital sensor, the data format is affected by the sensor itself, and may be binary, decimal, or 16-ary data.
The analog converted data is unified converted through the main control circuit board 6, so that normalization can be performed according to the set data threshold, and data comparison is convenient. If the data has a threshold which is obviously higher or lower than the threshold and exceeds a set maximum threshold, filtering processing is carried out, and single measurement errors are eliminated, wherein the specific method comprises the following steps: and summing the normal data acquired by the previous bit and the next bit and then averaging the sum to serve as the replacement data of the abnormal data.
Specifically, for the data of the digital sensor, because the unified analog-to-digital conversion is not performed by the main control circuit board 6, the acquired format may be two-level system, decimal system or 16-system data, the data can be uniformly converted into 16-system data for final processing, and if filtering is required, the judging and method principles are the same.
In one embodiment of the multi-sensor testing system for lithium battery thermal runaway detection, the main control circuit board 6 is subjected to IO expansion, wherein the IO expansion comprises a USB (universal serial bus) serial port, a download debugging interface and a data printing interface; the USB to serial port is used for transmitting sensing data to the PC end 8 through the USB port; the download debugging interface is used for bottom layer driving debugging of the main control circuit board 6 MCU; the data printing interface is used for collecting test data in a serial port printing mode. The IO expansion of the main control circuit board 6 can further expand the system functions, and more sensor testing requirements are realized. The USB-to-serial port can realize that data is uploaded to the PC end 8 through the USB port, and data acquisition is realized by using communication software such as a serial port genius. The data printing can enable test data to be collected in a serial port printing mode. The interfaces can further expand the functions of the system, adapt to the requirements of different acquisition methods and further expand the purposes of the system. The download debugging interface is used for bottom layer driving debugging of the MCU. The power indication is an indication of power-on of the system, and the state indication is used for indicating the working state of the system, such as error state prompt, alarm display and the like.
Referring to fig. 4, the present invention further provides a multi-sensor testing method for thermal runaway detection of a lithium battery, using the multi-sensor testing system for thermal runaway detection of a lithium battery, comprising the following steps:
the MCU of the main control module 1 distributes a fixed uniform format identifier to each sensor interface, and when the main control circuit board 6 is connected with the sensor module 3, the uploaded sensing data contains the identifier of the sensor connection interface, and the sensing data is subjected to data discrimination according to the identifier;
judging the type of a data processing algorithm method adopted by the data analysis module 5 according to the type of the sensing data, and processing the sensing data according to a selected data processing algorithm, wherein the data processing algorithm comprises normalization, filtering and unit unification;
and carrying out graphical or tabular processing on the processed sensing data, and outputting and displaying the processing result according to an output form preset by a user.
Specifically, a mark of analog conversion data is added to the end of 16-system sensing data after analog-to-digital conversion by the main control circuit board 6. Normalizing the set data threshold of the analog conversion data, and performing filtering processing when the data is higher or lower than the threshold and exceeds the set data threshold; the filtering processing mode is as follows: and summing the normal data acquired by the previous bit and the next bit and then averaging the sum to serve as the replacement data of the abnormal data.
Specifically, the collected binary and decimal digital signal data are uniformly converted into 16-system sensing data. Normalizing the digital signal data set with a data threshold, and performing filtering processing when the data has a data threshold higher or lower than the threshold and exceeds the set data threshold; the filtering processing mode is as follows: and summing the normal data acquired by the previous bit and the next bit and then averaging the sum to serve as the replacement data of the abnormal data. And outputting, displaying and comparing the processing result according to an output form preset by a user, wherein the comparison mode comprises the following steps: comparing test result data according to the type of the sensor; and comparing the test result data according to the time dimension.
Based on the technical scheme of the invention, the corresponding software development can be performed by combining specific functional modules. In the embodiment of the invention, the data processing is mainly finished by the upper computer, the data analysis module 5 in the data acquisition terminal software is operated, the upper computer actively finishes the centralized processing of the data, and the specific process of the data processing process is described as follows:
because the data uploaded by the acquisition system is affected by the sensor and has differences, firstly, software can judge the type of the acquired data, and an appropriate processing method is automatically selected according to the data, and the processing method of the data mainly comprises but is not limited to normalization, filtering, unit unification and the like. The processed data can automatically complete graphic and tabular processing, so that the result is convenient to output, and the output form can be defined by a user. If necessary, the data comparison function can be used for selecting different groups of data and generating graphs or tables at the same time for comparing test results of different sensors. In addition, the previous test result can be called out, and the comparison analysis can be performed to output a comparison result.
The system in the embodiment of the invention is built, can be suitable for the testing requirements of pressure, VOC, smoke and flame sensors used in various lithium battery thermal runaway, and can be tested together with the testing conditions of various sensors due to the high integration of the system, so that the flexibility is extremely high. The model selection test of the product development sensor is convenient, and the sensor function verification, comparison experiment and the like can also be used for testing and data acquisition of devices similar to sensor signals.
The data acquisition processing software matched with the system can backup all sensor test data uploaded by the main control circuit board 6 in real time, and after acquisition is finished, the data analysis module 5 of the software can be operated to perform centralized and unified processing on the tested data, the software can intelligently select to perform normalization, filtering algorithm, unit unification, diagramming, tabulation and other processing according to the data requirements of different sensors, and finally output data processing results can intuitively reflect the comparison results of the tested sensors.
The invention has been successfully used in practice in confidentiality, and the result accords with the invention expectation through functional verification, and the testing of various pressure, VOC and smoke sensors is completed, so that good testing results are obtained. The technical scheme of the invention has extremely high universality, can be adapted to various sensor interfaces, needs to add new types of sensor tests, only needs to develop corresponding circuit boards aiming at the sensors, and is convenient for welding the sensors and realizing the conversion of special voltages required by the sensors; the data acquisition and processing are performed in a unified mode, the unified data operation is realized through an algorithm, the test result of each sensor can be visually compared, the system can call out the previous test result if necessary, and the comparison analysis is performed with the current result, so that optimization and improvement suggestions are provided for the test process; development cost is saved, and product development period is shortened; the method is convenient for uniformly processing and analyzing the data of a plurality of sensors tested simultaneously, and the result contrast is more obvious.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (9)
1. A multisensor test system for lithium cell thermal runaway detection, its characterized in that includes main control module, power module, sensor module, communication module and data analysis module: the system comprises a main control module, a sensor module, a communication module, a data analysis module, a power supply module, a communication module and a data analysis module, wherein the main control module and the power supply module are connected, the sensor module and the main control module are connected, the communication module and the main control module are connected, and the data analysis module and the communication module are connected; wherein:
the main control module is used for controlling and driving the sensor and collecting data of the sensor;
the power supply module is used for supplying power to the main control module;
the sensor module is used for power supply control and level conversion of the sensor;
the communication module is used for uploading the acquired data of the sensor module received by the main control module;
the data analysis module is used for storing, processing and outputting the acquired data uploaded by the communication module; the processing of the data analysis module comprises normalization, filtering, unit unification, diagrammatization and tabulation processing of the sensing data;
the main control module is integrated on a main control circuit board, and the main control circuit board is provided with an analog interface, a digital interface and a power supply communication interface; the sensor module is integrated on a sensor circuit board, and the analog interface and the digital interface are connected with the sensor circuit board; the data analysis module is configured with an upper computer;
the main control circuit board performs level conversion on sensor interfaces of different digital interfaces; the main control circuit board supplies power to the sensor circuit board; the MCU of the main control circuit board completes system initialization, the sensor module outputs sensing data under the responsive test condition, the sensing data is collected and processed by the MCU of the main control circuit board and then uploaded to the CAN-to-USB device through the power communication interface, and the sensing data is uploaded to the PC terminal through the CAN-to-USB device and stored in the PC terminal in the format of original data.
2. The multi-sensor testing system for lithium battery thermal runaway detection of claim 1, wherein the analog interface comprises analog input lines ach+ and ACH-; the digital interface comprises an IIC interface, a UART interface, an SPI interface and an RS485 interface.
3. The multi-sensor testing system for lithium battery thermal runaway detection of claim 1, wherein the main control circuit board is subjected to IO expansion, and the IO expansion comprises a USB (universal serial bus) serial port, a download debugging interface and a data printing interface; the USB-to-serial port is used for transmitting sensing data to the PC end through the USB port; the download debugging interface is used for bottom layer driving debugging of the main control circuit board MCU; the data printing interface is used for collecting test data in a serial port printing mode.
4. A multi-sensor testing method for thermal runaway detection of a lithium battery, employing the multi-sensor testing system for thermal runaway detection of a lithium battery according to any one of claims 1 to 3, characterized by comprising the steps of:
the MCU of the main control module distributes a fixed uniform format identifier to each sensor interface, and when the main control circuit board is connected with the sensor module, the uploaded sensing data contains the identifier of the sensor connection interface, and the sensing data is subjected to data discrimination according to the identifier;
judging the type of a data processing algorithm method adopted by a data analysis module according to the type of the sensing data, and processing the sensing data according to a selected data processing algorithm, wherein the data processing algorithm comprises normalization, filtering and unit unification;
and carrying out graphical or tabular processing on the processed sensing data, and outputting and displaying the processing result according to an output form preset by a user.
5. The multi-sensor testing method for thermal runaway detection of a lithium battery according to claim 4, wherein the end of the 16-system sensing data after analog-to-digital conversion by the main control circuit board is added with a mark of analog conversion data.
6. The method for testing multiple sensors for thermal runaway detection of a lithium battery according to claim 5, wherein the analog conversion data is normalized by setting a data threshold, and filtering is performed when the data has a value higher than or lower than the threshold and exceeds the set data threshold; the filtering processing mode is as follows: and summing the normal data acquired by the previous bit and the next bit and then averaging the sum to serve as the replacement data of the abnormal data.
7. The method for multi-sensor testing for thermal runaway detection of lithium batteries according to claim 4, wherein the collected binary and decimal digital signal data are uniformly converted into 16-system sensing data.
8. The method for testing the multiple sensors for detecting the thermal runaway of the lithium battery according to claim 7, wherein the digital signal data is normalized by setting a data threshold, and when the data is higher or lower than the threshold and exceeds the set data threshold, filtering is performed; the filtering processing mode is as follows: and summing the normal data acquired by the previous bit and the next bit and then averaging the sum to serve as the replacement data of the abnormal data.
9. The multi-sensor testing method for thermal runaway detection of a lithium battery according to claim 4, wherein the processing result output is displayed and compared according to an output form preset by a user, and the comparing mode comprises: comparing test result data according to the type of the sensor; and comparing the test result data according to the time dimension.
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