WO2024082542A1 - 测试方法、测试装置、测试系统和存储介质 - Google Patents

测试方法、测试装置、测试系统和存储介质 Download PDF

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Publication number
WO2024082542A1
WO2024082542A1 PCT/CN2023/082923 CN2023082923W WO2024082542A1 WO 2024082542 A1 WO2024082542 A1 WO 2024082542A1 CN 2023082923 W CN2023082923 W CN 2023082923W WO 2024082542 A1 WO2024082542 A1 WO 2024082542A1
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WO
WIPO (PCT)
Prior art keywords
concentration
gas
signal
alarm
gas sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/082923
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English (en)
French (fr)
Inventor
郑宏宇
任少滕
林锶
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Contemporary Amperex Technology Co Ltd
Original Assignee
Contemporary Amperex Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Contemporary Amperex Technology Co Ltd filed Critical Contemporary Amperex Technology Co Ltd
Priority to EP23734129.2A priority Critical patent/EP4382879B1/en
Priority to PL23734129.2T priority patent/PL4382879T3/pl
Priority to US18/346,498 priority patent/US20240230451A9/en
Publication of WO2024082542A1 publication Critical patent/WO2024082542A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • 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
    • H01M10/4228—Leak testing of cells or batteries
    • 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
    • H01M10/4285—Testing apparatus
    • 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
    • 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

Definitions

  • the present application relates to the field of battery technology, and in particular to a testing method, a testing device, a testing system and a storage medium.
  • the embodiments of the present application provide a testing method, a testing device, a testing system and a storage medium, which can solve the technical problem of how to detect leakage of a battery cell.
  • the testing method of the embodiment of the present application is used for a battery cell, and the testing method includes:
  • a gas sensor installed in the test box is used to monitor the predetermined gas concentration in the test box, and when the gas concentration is greater than the concentration threshold, a concentration exceeding standard signal is issued, so that it can be confirmed whether the battery cell has a leakage fault based on the gas concentration.
  • the determining the gas concentration of the predetermined gas in the test box based on the CAN signal includes:
  • a gas concentration of a predetermined gas is determined based on the internal data.
  • the gas concentration of the predetermined gas can be determined more accurately based on the internal data of the gas sensor.
  • determining the gas concentration of a predetermined gas according to the internal data comprises:
  • the testing method comprises:
  • the flag of the alarm bit is changed from 0 to 1.
  • issuing a concentration exceeding limit signal comprises:
  • the switch When the gas concentration is greater than the concentration threshold, the switch is controlled to close so that the control circuit sends a switch signal, and the switch signal is used as the concentration exceeding the limit signal.
  • the testing method further comprises:
  • an alarm signal is issued, and the alarm signal is used to cause an alarm device to issue an alarm.
  • the alarm device can sound an alarm based on the alarm signal, and can promptly notify relevant personnel of the problem of battery monomer leakage.
  • the step of issuing an alarm signal based on the concentration exceeding the limit signal comprises:
  • the position information of the gas sensor is loaded into the concentration exceeding standard signal to form the alarm signal and the alarm signal is sent out.
  • the alarm signal has the position information of the gas sensor, so that the position of the battery cell where the leakage occurs can be determined according to the position of the sensor, which is convenient for subsequent timely processing.
  • An acquisition module used for acquiring a CAN signal output by a gas sensor, wherein the gas sensor is arranged on a test box, and a battery cell is placed in the test box;
  • a confirmation module is used to confirm the gas concentration of the predetermined gas in the test box based on the CAN signal.
  • the sending module is used to send a concentration exceeding standard signal when the gas concentration is greater than a concentration threshold.
  • a gas sensor arranged in the test box is used to monitor the predetermined gas concentration in the test box, and when the gas concentration is greater than the concentration threshold, a concentration exceeding standard signal is issued, so that it can be confirmed whether the battery cell has a leakage fault based on the gas concentration.
  • a gas sensor wherein the gas sensor is disposed on a test box, and a battery cell is placed in the test box;
  • a control circuit board includes a communication module, the communication module is connected to the gas sensor and is used to obtain a CAN signal output by the gas sensor, and is used to confirm the gas concentration of a predetermined gas in the test box based on the CAN signal, and is used to send a concentration exceeding limit signal when the gas concentration is greater than a concentration threshold.
  • a gas sensor installed in the test box is used to monitor the predetermined gas concentration in the test box, and when the gas concentration is greater than the concentration threshold, a concentration exceeding standard signal is issued, so that it can be confirmed whether the battery cell has a leakage fault based on the gas concentration.
  • the communication module is further configured to read internal data of the gas sensor based on the CAN signal; and to determine a gas concentration of a predetermined gas according to the internal data.
  • the gas concentration of the predetermined gas can be determined more accurately based on the internal data of the gas sensor.
  • the communication module is also used to obtain the flag of the alarm bit of the internal data; and to determine that the gas concentration of the predetermined gas is greater than the concentration threshold when the flag of the alarm bit is 1; and to determine that the gas concentration of the predetermined gas is less than or equal to the concentration threshold when the flag of the alarm bit is 0.
  • the gas sensor is used to modify the flag of the alarm bit from 0 to 1 if the detected gas concentration is greater than a concentration threshold within a predetermined time period.
  • the communication module is used to control the switch of the control circuit board to close when the gas concentration is greater than a concentration threshold so that the control circuit sends a switch signal; and to use the switch signal as the concentration exceeding the limit signal.
  • control circuit board further includes an output module, and the output module is used to issue an alarm signal based on the concentration exceeding standard signal;
  • the test system further comprises an alarm controller, which is used to control the alarm device to issue an alarm according to the alarm signal.
  • the alarm device can sound an alarm based on the alarm signal, and can promptly notify relevant personnel of the problem of battery monomer leakage.
  • the output module is further configured to load the position information of the gas sensor into the concentration-exceeding signal to form the alarm signal and send out the alarm signal.
  • the alarm signal has the position information of the gas sensor, so that the position of the battery cell where the leakage occurs can be determined according to the position of the sensor, which is convenient for subsequent timely processing.
  • the gas sensor is disposed on a side surface of the test box and is located above a height midline of the side surface.
  • a non-volatile computer-readable storage medium of computer-executable instructions when the computer-executable instructions are executed by one or more processors, enables the processors to execute the test method described in any one of the above embodiments.
  • FIG1 is a schematic flow chart of a testing method according to one embodiment of the present application.
  • FIG2 is a perspective view of a test box according to one embodiment of the present application.
  • FIG3 is a schematic flow chart of a testing method according to one embodiment of the present application.
  • FIG4 is a schematic diagram of a flow chart of a testing method according to one embodiment of the present application.
  • FIG5 is a schematic diagram of a flow chart of a testing method according to one embodiment of the present application.
  • FIG6 is a schematic diagram of the structure of a test system according to one embodiment of the present application.
  • FIG. 7 is a schematic diagram of a module of a testing device according to one embodiment of the present application.
  • the term "and/or" is only a description of the association relationship of associated objects, indicating that three relationships may exist.
  • a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone.
  • the character "/" in this article generally indicates that the associated objects before and after are in an "or" relationship.
  • multiple refers to more than two (including two).
  • multiple groups refers to more than two groups (including two groups), and “multiple pieces” refers to more than two pieces (including two pieces).
  • Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric bicycles, Electric vehicles such as electric motorcycles and electric cars, as well as military equipment and aerospace and other fields. As the application field of power batteries continues to expand, its market demand is also constantly expanding.
  • battery cells are prone to failure or leakage due to corrosion and rupture of the shell. After the battery cell leaks, moisture can easily enter the battery cell, making the battery cell at risk of thermal runaway.
  • the battery cell voltage, SOC, insulation value, etc. are normal in a short period of time, making it difficult to timely and effectively detect whether the battery cell is leaking through parameters such as voltage.
  • the battery cell performance is tested in an incubator, it is even more impossible to effectively identify whether the battery cell is leaking in the incubator, resulting in the failure of the battery cell to leak cannot be discovered in time.
  • battery electrolytes are usually carbonate liquids, which are reducing.
  • battery cells will produce reducing gases such as hydrocarbons and CO during the working cycle. Once a battery cell leaks, the volatiles and gas-producing components of the electrolyte leak together, causing the concentration of reducing substances in the air to increase.
  • the applicant installed a gas sensor on the incubator to detect the concentration of reducing gas in the test chamber through the gas sensor, and then determined whether the battery cell was leaking based on the detected concentration of reducing gas, thus solving the problem of difficulty in identifying battery cell leakage.
  • Figure 1 is a schematic flow chart of a test method according to one embodiment of the present application.
  • Figure 2 is a three-dimensional schematic diagram of a test box according to one embodiment of the present application.
  • the testing method of the embodiment of the present application is used for a battery cell, and the testing method includes:
  • battery cells can be used in electrical devices that use batteries as power sources or various energy storage systems that use batteries as energy storage elements.
  • Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc.
  • Each battery cell can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto.
  • the battery cell can be cylindrical, flat, rectangular, or in other shapes.
  • the gas sensor 110 may be a semiconductor sensor, which includes metal oxide or semiconductor oxide crystals.
  • the working principle of the semiconductor sensor is as follows: after the semiconductor sensor is preheated, the semiconductor sensor can adsorb oxygen in the air on the crystal surface, and the active electrons on the crystal surface The oxygen is transferred to the adsorbed oxygen, leaving a positive charge in the space charge layer of the crystal. In this way, the crystal forms a barrier that hinders the flow of electrons.
  • the reducing gas appears around the gas sensor 110, the reducing gas reacts with the negatively charged oxygen atoms on the surface of the crystal, causing the oxygen density on the surface of the crystal to decrease. Therefore, the barrier height in the crystal grain boundary decreases, and the decrease in the barrier height causes the sensor resistance to decrease, generating a significant electrical signal.
  • the gas sensor 110 can be other types of sensors.
  • the gas sensor 110 is an electrochemical sensor or other sensors.
  • the CAN signal is a signal form output by the gas sensor 110 .
  • the CAN signal may include information such as the data generation time of the gas sensor 110 . According to the CAN signal, information detected by the gas sensor 110 may be obtained.
  • the test box 112 may also be referred to as a temperature box, which is a device that can adjust the internal environment of the box.
  • the temperature inside the test box 112 can be adjusted up or down.
  • the temperature inside the test box 112 can be increased by introducing hot air into the test box 112.
  • the gas density inside the test box 112 can be increased or decreased.
  • the gas inside the test box 112 can be extracted by an exhaust fan, so that the gas density inside the test box 112 decreases.
  • the gas sensor 110 can be installed on the wall of the test box 112. Specifically, a through hole can be opened on the wall of the test box 112, and then the gas sensor 110 is installed at the through hole and partially extends into the test box 112, so that the gas sensor 110 can effectively detect the predetermined gas in the test box 112.
  • the predetermined gas may be a reducing gas, such as carbon monoxide, hydrocarbons and the like.
  • the gas sensor 110 may detect reducing gases.
  • the gas concentration of the predetermined gas may be determined by the CAN signal output by the gas sensor 110. It should be noted that the gas concentration of the predetermined gas may be determined by determining a specific value of the gas concentration or by determining a range of the gas concentration. For example, the gas concentration may be determined to be equal to 15 ppm or greater than 15 ppm, wherein ppm (parts per million) is the parts per million of the total gas volume of the predetermined gas in the test chamber 112.
  • the concentration threshold is a critical value for determining whether the battery cell can leak.
  • the concentration threshold can be obtained based on experiments, for example, the concentration threshold is 50 ppm. That is, when the gas concentration is greater than 50 ppm, a concentration exceeding standard signal is issued.
  • the concentration exceeding standard signal may be an analog signal or a digital signal.
  • the concentration exceeding standard signal is a high level signal. Therefore, according to the concentration exceeding standard signal, it is possible to accurately determine that the gas concentration of the predetermined gas in the test box 112 exceeds the standard, and further determine that the battery cell has leaked.
  • the gas sensor 110 arranged in the test box 112 is used to monitor the predetermined gas concentration in the test box 112, and when the gas concentration is greater than the concentration threshold, a concentration exceeding standard signal is issued, so that it is possible to confirm whether the battery cell has a leakage fault based on the gas concentration.
  • confirming the gas concentration of the predetermined gas in the test box 112 includes:
  • the CAN signal may not be able to directly load the gas concentration information, and after parsing the CAN signal, the gas concentration information may not be directly obtained. Therefore, through the CAN signal, the internal data cached by the gas sensor 110 can be directly read, so that the gas concentration of the predetermined gas can be obtained according to the internal data of the gas sensor 110.
  • the CAN signal has an address for caching gas concentration, through which the internal data of the gas sensor 110 can be quickly read to determine the gas concentration of the predetermined gas. In this way, the gas concentration of the predetermined gas can be determined more accurately according to the internal data of the gas sensor 110.
  • determining the gas concentration of a predetermined gas according to internal data (S22) includes:
  • the alarm bit is a data storage bit that indicates whether a certain event has occurred.
  • the alarm bit is used to indicate the relationship between the gas concentration of a predetermined gas and the concentration threshold.
  • the flag of the alarm bit can be represented by 0 or 1, so that an external device can easily read the identification of the alarm bit.
  • the setting of the alarm bit makes it easier for an external device to parse the data of the sensor when reading it, thereby making the test method of the implementation mode of the present application easy to implement.
  • the testing method comprises:
  • the flag of the alarm bit is changed from 0 to 1.
  • the predetermined time period determines whether the single cell leaks during the test. It can be determined by experiments, for example, the predetermined time can be 20 minutes. In this way, by limiting the detection time, it can be accurately determined whether the battery monomer has a leakage phenomenon.
  • start time of the predetermined time period may be the time when the test box 112 starts working, or any time after the test box 112 starts working; the end time of the predetermined time period is the time after the predetermined time period is reached, counting from the start time.
  • the scheduled duration can be divided into multiple times according to the start time of the timing.
  • the start time of the first scheduled duration is the 1st minute and the end time is the 20th minute
  • the start time of the second scheduled duration is the 2nd minute and the end time is the 21st minute.
  • the flag of the alarm bit is changed from 0 to 1.
  • issuing a concentration exceeding limit signal (S30) includes:
  • the control switch When the gas concentration is greater than the concentration threshold, the control switch is closed so that the control circuit sends a switch signal, and the switch signal is used as a concentration exceeding standard signal.
  • a switch is a device that controls the on and off of a circuit.
  • the switch may be a relay switch, a transistor switch, or other components.
  • the present application does not limit the specific type of the switch.
  • a control circuit is a circuit that includes a switch and can generate an electrical signal. When the switch is closed, the control circuit may be in a working state and can generate an electrical signal. When the switch is open, the control circuit may be in a non-working state and cannot generate an electrical signal.
  • the signal formed by the control circuit according to the state of the switch being closed or open is a switch quantity signal.
  • a switch quantity signal is similar to a pulse signal.
  • a switch quantity signal is an intermittent signal, not a continuous signal.
  • the control circuit can send a switch signal, and use the switch signal as a concentration exceeding standard signal.
  • the signal analysis is easy, which is conducive to the subsequent processing of the concentration exceeding standard signal.
  • the processing process is simpler, making the test method of the embodiment of the present application easier to implement.
  • the testing method further comprises:
  • an alarm signal is issued, and the alarm signal is used to make the alarm device 114 (as shown in FIG. 6 ) issue an alarm.
  • the alarm signal is a control signal that causes the alarm device 114 to issue an alarm, or in other words, the alarm device 114 can issue an alarm according to the control signal.
  • the alarm signal can issue alarms of different types and/or levels to indicate the risk of leakage of the battery cell.
  • the alarm device 114 can issue a light alarm and represent different abnormal levels according to different color levels such as red, orange, yellow, and green.
  • the alarm can also be The device 114 emits different timbres or audios to present different abnormality levels based on the above colors, or to present different abnormality levels separately. For example, the alarm duration is longer, the timbre is heavier, or the pitch is higher.
  • the embodiment of the present application does not limit the alarm method.
  • the alarm device 114 may include a speaker, a display screen, and an indicator light.
  • the alarm device 114 may issue a sound alarm; when the alarm device 114 is a display screen, the alarm device 114 may issue an image alarm; when the alarm device 114 is an indicator light, the alarm device 114 may issue a light alarm.
  • the alarm device 114 may issue an alarm based on the alarm signal, and may timely realize the early warning of the battery cell leakage event, so that the relevant personnel may obtain the battery cell leakage problem in time, and facilitate the processing of the test data (such as the leakage time), so as to solve the battery cell leakage problem in time.
  • issuing an alarm signal includes:
  • the position information of the gas sensor 110 is loaded into the concentration exceeding standard signal to form an alarm signal and the alarm signal is sent out.
  • multiple battery cells may be tested at the same time.
  • there are multiple test boxes 112 and one test box 112 can be placed in one battery cell, so that one test box 112 can test one battery cell. Since at least one gas sensor 110 is provided on each temperature measurement test box 112, there are multiple gas sensors 110.
  • the multiple gas sensors 110 can be connected to the same controller.
  • the multiple gas sensors 110 can be coded, and different codes correspond to different communication protocols on the controller. By parsing the communication protocol to identify the gas sensors 110 at different positions, the positions of the gas sensors 110 and the test box 112 can be easily located, so as to deal with the failed battery cells in time.
  • the alarm signal has the position information of the gas sensor 110, so that the position of the battery cell where the leakage occurs can be determined according to the position of the sensor, which is convenient for subsequent timely processing.
  • the present application further provides a test system 116.
  • the test system 116 of the embodiment of the present application includes a gas sensor 110 and a control circuit board 118.
  • the gas sensor 110 is disposed on a test box 112, and a battery cell is placed in the test box 112.
  • the control circuit board 118 includes a communication module 120.
  • the communication module 120 is connected to the gas sensor 110 and is used to obtain a CAN signal output by the gas sensor 110, and is used to confirm the gas concentration of a predetermined gas in the test box 112 based on the CAN signal, and is used to send a concentration exceeding standard signal when the gas concentration is greater than a concentration threshold.
  • control circuit board 118 is based on a printed circuit board, on which processing components.
  • the communication module 120 of the control circuit board 118 can receive the CAN signal output by the gas sensor 110, and send out a concentration exceeding standard signal after performing the analysis and other processing on the CAN signal.
  • the gas sensor 110 set in the test box 112 is used to monitor the predetermined gas concentration in the test box 112, and when the gas concentration is greater than the concentration threshold, a concentration excess signal is issued, so that it can be confirmed whether the battery cell has a leakage fault based on the gas concentration.
  • the communication module 120 is further configured to read internal data of the gas sensor 110 based on the CAN signal; and to determine the gas concentration of the predetermined gas according to the internal data.
  • the gas concentration of the predetermined gas may be determined more accurately according to the internal data of the gas sensor 110 .
  • the communication module 120 is also used to obtain the flag of the alarm bit of the internal data; and to determine that the gas concentration of the predetermined gas is greater than the concentration threshold when the flag of the alarm bit is 1; and to determine that the gas concentration of the predetermined gas is less than or equal to the concentration threshold when the flag of the alarm bit is 0.
  • the setting of the alarm bit makes it easier to parse the data of the sensor when the external device reads it, thereby making the test method of the embodiment of the present application easy to implement.
  • the gas sensor 110 is configured to change the flag of the alarm bit from 0 to 1 if the detected gas concentration is greater than a concentration threshold within a predetermined period of time.
  • the communication module 120 is used to control the switch of the control circuit board 118 to close when the gas concentration is greater than the concentration threshold, so that the control circuit sends a switch signal; and is used to use the switch signal as a concentration excess signal.
  • control circuit can send a switch signal, and the switch signal is used as the concentration exceeding standard signal, the difficulty of signal analysis is low, which is conducive to the subsequent processing of the concentration exceeding standard signal, and the processing process is simpler, making the test method of the embodiment of the present application easier to implement.
  • control circuit can be a part of the circuit of the communication module 120, or the communication module 120 includes the control circuit.
  • control circuit board 118 further includes an output module 122 , and the output module 122 is used to issue an alarm signal based on the concentration exceeding standard signal;
  • the test system 116 further includes an alarm controller 124, which is used to control the alarm device 114 to issue an alarm according to an alarm signal.
  • the output module 122 is a circuit that realizes a specific function on the control circuit board 118, and the output module 122 has the function of analyzing the concentration exceeding standard signal.
  • the concentration exceeding standard signal output by the communication module 120 can be a switch signal, and this switch signal can be obtained by the output module 122, so that the output module 122 outputs an alarm signal according to the switch signal.
  • the alarm controller 124 is, for example, a microprocessor, and the alarm controller 124 can implement the issuance of instructions, so that the alarm device 114 works according to the instructions issued by the alarm controller 124 .
  • the alarm device 114 can sound an alarm according to the alarm signal, and can promptly notify relevant personnel of the problem of battery cell leakage.
  • the output module 122 is further used to load the position information of the gas sensor 110 into the concentration exceeding standard signal to form an alarm signal and send the alarm signal.
  • each gas sensor 110 may be connected to a communication module 120, and each communication module 120 may be connected to an output module 122.
  • the gas sensor 110 and the output module 122 may have a one-to-one correspondence.
  • the position information of the gas sensor 110 may be pre-stored in the output module 122.
  • the output module 122 has an encoder, and the gas sensor 110 may be encoded by the encoder to form the position information of the gas sensor 110.
  • the output module 122 may process the concentration exceeding standard signal by loading the position information of the gas sensor 110 and form an alarm signal.
  • the alarm signal has the position information of the gas sensor 110, and the alarm controller 124 may control the alarm device 114 to send out the alarm information such as the position of the battery cell failure according to the alarm signal.
  • the alarm signal has the position information of the gas sensor 110, so that the position of the leaking battery cell can be determined according to the position of the sensor, which is convenient for on-site personnel to handle the failed battery cell in time and avoid risks such as explosion.
  • each control circuit board 118 includes a communication module 120 and an output module 122.
  • the number of control circuit boards 118 can also be one, and one control circuit board 118 includes multiple communication modules 120 and multiple output modules 122, and the communication modules 120 and the output modules 122 can be connected one by one.
  • the number of communication modules 120 and output modules 122 on each control circuit board 118 may be different, but in multiple control circuit boards 118, the total number of communication modules 120 and output modules 122 are the same, and one communication module 120 is connected to a corresponding one.
  • An output module 122 is provided.
  • the gas sensor 110 is disposed on a side of the test box 112 and is located above a height centerline of the side of the test box 112 .
  • the test box 112 can change the temperature in the test box 112 by circulating air. For example, hot air can be introduced into the test box 112 to increase the temperature of the test box 112.
  • the air outlet of the test box 112 is generally located at the lower part of the front and rear plates of the test box 112. Therefore, in the test box 112, the gas flowability in the lower space of the test box 112 is relatively large, and the gas flowability in the upper space of the test box 112 is relatively small, and the reducing gas generally tends to be located in the upper space of the test box 112.
  • the side of the test box 112 is relative to the front and back surfaces and the top and bottom surfaces of the test box 112.
  • the side of the test box 112 connects the top and bottom surfaces and the front and back surfaces of the test box 112.
  • the height center line of the side is a line that divides the side into equal heights along the height direction.
  • the gas is located above the height center line of the side, which can be the height center line passing through the gas sensor 110, or the gas sensor 110 deviates from the height center line.
  • the gas sensor 110 is arranged above the height center line of the side surface of the test box 112, so that the gas sensor 110 is less disturbed and the detection accuracy is higher.
  • the length, width and height of the gas sensor 110 are 76.8*38*19.5 mm, and the gas sensor 110 can be installed on the side of the test box 112 about 10 cm away from the top.
  • testing method of the above embodiment is applicable to the testing system 116 of the present application.
  • testing system 116 of the embodiment of the present application please refer to the corresponding parts of the above testing method, which will not be repeated here.
  • the testing device 126 of the embodiment of the present application includes an acquisition module 128, a confirmation module 130 and a sending module 132.
  • the acquisition module 128 is used to acquire the CAN signal output by the gas sensor 110.
  • the gas sensor 110 is set on the test box 112, and the battery cell is placed in the test box 112;
  • the confirmation module 130 is used to confirm the gas concentration of the predetermined gas in the test box 112 based on the CAN signal;
  • the sending module 132 is used to send a concentration exceeding signal when the gas concentration is greater than the concentration threshold.
  • a gas sensor 110 provided in the testing box 112 is used to monitor a predetermined gas concentration in the testing box 112, and when the gas concentration is greater than a concentration threshold, a concentration exceeding standard signal is issued, so that it is possible to confirm whether the battery cell has a leakage fault based on the gas concentration.
  • the confirmation module 130 is further configured to read internal data of the gas sensor 110 based on the CAN signal; and to determine the gas concentration of the predetermined gas according to the internal data.
  • the gas concentration of the predetermined gas may be determined more accurately according to the internal data of the gas sensor 110 .
  • the confirmation module 130 is also used to obtain the flag of the alarm bit of the internal data; and to determine that the gas concentration of the predetermined gas is greater than the concentration threshold when the flag of the alarm bit is 1; and to determine that the gas concentration of the predetermined gas is less than or equal to the concentration threshold when the flag of the alarm bit is 0.
  • the sending module 132 is used to control the switch of the control circuit board 118 to close when the gas concentration is greater than the concentration threshold, so that the control circuit sends a switch signal; and to use the switch signal as a concentration exceeding limit signal.
  • the sending module 132 is used to send an alarm signal based on the concentration exceeding standard signal; the alarm signal is used to make the alarm device 114 send an alarm. In this way, the alarm device 114 can send an alarm according to the alarm signal to promptly notify relevant personnel of the problem of battery monomer leakage.
  • the sending module 132 is further used to load the location information of the gas sensor 110 into the concentration exceeding standard signal to form an alarm signal and send the alarm signal.
  • the alarm signal has the position information of the gas sensor 110, so that the position of the battery cell where the leakage occurs can be determined according to the position of the sensor, which is convenient for subsequent timely processing.
  • testing method of the above embodiment is applicable to the testing device 126 of the present application.
  • testing device 126 of the embodiment of the present application please refer to the corresponding parts of the above testing method, which will not be repeated here.
  • a non-volatile computer-readable storage medium of computer-executable instructions when the computer-executable instructions are executed by one or more processors, enables the processors to execute the testing method of any one of the above embodiments.
  • the logic and/or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processing module, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses.
  • "computer-readable medium” can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses.
  • computer-readable media include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM).
  • the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.
  • each functional unit in each embodiment of the present application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into one module.
  • the above-mentioned integrated module can be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.
  • the above-mentioned storage medium can be a read-only memory, a disk or an optical disk, etc.

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Abstract

一种测试方法、测试装置(126)、测试系统(116)和存储介质，能够解决如何检测电池单体发生漏液的技术问题。测试方法包括：获取气体传感器(110)输出的CAN信号，气体传感器(110)设置在测试箱体(112)上，测试箱体(112)中放置有电池单体(S10)；基于CAN信号，确认测试箱体(112)中的预定气体的气体浓度(S20)；在气体浓度大于浓度阈值时，发出浓度超标信号(S30)。

Description

测试方法、测试装置、测试系统和存储介质
优先权信息
本申请请求2022年10月19日向中国国家知识产权局提交的、专利申请号为202211281900.9的专利申请的优先权和权益，并且通过参照将其全文并入此处。
技术领域
本申请涉及电池技术领域，尤其涉及一种测试方法、测试装置、测试系统和存储介质。
背景技术
节能减排是汽车产业可持续发展的关键，电动车辆由于其节能环保的优势成为汽车产业可持续发展的重要组成部分。对于电动车辆而言，电池技术又是关乎其发展的一项重要因素。在电池研发阶段的测试中，电池单体易产生失效或壳体腐蚀破裂产生漏液。在电池单体漏液后，湿气容易进入电池单体内，使得电池单体存在热失控风险。因此，如何检测电池单体发生漏液成为待解决的技术问题。
发明内容
本申请实施方式提供了一种测试方法、测试装置、测试系统和存储介质，能够解决如何检测电池单体发生漏液的技术问题。
本申请实施方式的测试方法用于电池单体，所述测试方法包括：
获取气体传感器输出的CAN信号，所述气体传感器设置在测试箱体上，所述测试箱体中放置有电池单体；
基于所述CAN信号，确认所述测试箱体中的预定气体的气体浓度；
在所述气体浓度大于浓度阈值时，发出浓度超标信号。
本申请实施方式的测试方法中，利用设置在测试箱体气体传感器监测测试箱体中预定气体浓度，并在所述气体浓度大于浓度阈值时，发出浓度超标信号，这样可以根据气体浓度确认电池单体是否存在漏液的故障。
在某些实施方式中，所述基于所述CAN信号，确认所述测试箱体中的预定气体的气体浓度，包括：
基于所述CAN信号，读取所述气体传感器的内部数据；
根据所述内部数据确定预定气体的气体浓度。
如此，根据气体传感器的内部数据可以更加准确地确定预定气体的气体浓度。
在某些实施方式中，所述根据所述内部数据确定预定气体的气体浓度，包括：
获取所述内部数据的报警位的标志；
在所述报警位的标志为1时，确定预定气体的气体浓度大于浓度阈值；
在所述报警位的标志为0时，确定预定气体的气体浓度小于或等于浓度阈值。
如此，通过报警位的标志，可以确定气体浓度是否超过浓度阈值。
在某些实施方式中，所述测试方法包括：
在预定时长内，若气体传感器检测到的气体浓度大于浓度阈值，将所述报警位的标志由0修改为1。
如此，通过限制检测时间，可以准确地确定电池单体是否产生漏液现象。
在某些实施方式中，所述在所述气体浓度大于浓度阈值时，发出浓度超标信号，包括：
在所述气体浓度大于浓度阈值时，控制开关闭合，以使控制电路发出开关量信号，并将所述开关量信号作为所述浓度超标信号。
如此，采用开关量信号作为浓度超标信号，有利于后续处理浓度超标信号，处理过程更加简单。
在某些实施方式中，所述测试方法还包括：
基于所述浓度超标信号，发出报警信号，所述报警信号用于使报警装置发出报警。
如此，报警装置根据报警信号报警，可以及时地通知相关人员电池单体发生漏液的问题。
在某些实施方式中，所述基于所述浓度超标信号，发出报警信号，包括：
在所述浓度超标信号中加载所述气体传感器的位置信息以形成所述报警信号并将所述报警信号发出。
如此，报警信号具有气体传感器的位置信息，这样可以根据传感器的位置确定发生漏液的电池单体的位置，便于后序及时处理。
本申请实施方式的测试装置包括：
获取模块，用于获取气体传感器输出的CAN信号，所述气体传感器设置在测试箱体上，所述测试箱体中放置有电池单体；
确认模块，用于基于所述CAN信号，确认所述测试箱体中的预定气体的气体浓 度；
发送模块，用于在所述气体浓度大于浓度阈值时，发出浓度超标信号。
本申请实施方式的测试装置中，利用设置在测试箱体气体传感器监测测试箱体中预定气体浓度，并在所述气体浓度大于浓度阈值时，发出浓度超标信号，这样可以根据气体浓度确认电池单体是否存在漏液的故障。
本申请实施方式的测试系统包括：
气体传感器，所述气体传感器设置在测试箱体上，所述测试箱体中放置有电池单体；
控制电路板，所述控制电路板包括通讯模块，所述通讯模块与所述气体传感器连接并用于获取气体传感器输出的CAN信号，及用于基于所述CAN信号，确认所述测试箱体中的预定气体的气体浓度，以及用于在所述气体浓度大于浓度阈值时，发出浓度超标信号。
本申请实施方式的测试系统中，利用设置在测试箱体气体传感器监测测试箱体中预定气体浓度，并在所述气体浓度大于浓度阈值时，发出浓度超标信号，这样可以根据气体浓度确认电池单体是否存在漏液的故障。
在某些实施方式中，所述通讯模块还用于基于所述CAN信号，读取所述气体传感器的内部数据；及用于根据所述内部数据确定预定气体的气体浓度。
如此，根据气体传感器的内部数据可以更加准确地确定预定气体的气体浓度。
在某些实施方式中，所述通讯模块还用于获取所述内部数据的报警位的标志；及用于在所述报警位的标志为1时，确定预定气体的气体浓度大于浓度阈值；以及用于在所述报警位的标志为0时，确定预定气体的气体浓度小于或等于浓度阈值。
如此，通过报警位的标志，可以确定气体浓度是否超过浓度阈值。
在某些实施方式中，所述气体传感器用于在预定时长内，若检测到的气体浓度大于浓度阈值，将所述报警位的标志由0修改为1。
如此，通过限制检测时间，可以准确地确定电池单体是否产生漏液现象。
在某些实施方式中，所述通讯模块用于在所述气体浓度大于浓度阈值时，控制所述控制电路板的开关闭合，以使控制电路发出开关量信号；及用于将所述开关量信号作为所述浓度超标信号。
如此，采用开关量信号作为浓度超标信号，有利于后续处理浓度超标信号，处理过程更加简单。
在某些实施方式中，所述控制电路板还包括输出模块，所述输出模块用于基于所述浓度超标信号，发出报警信号；
所述测试系统还包括报警控制器，所述报警控制器用于根据所述报警信号控制报警装置发出报警。
如此，报警装置根据报警信号报警，可以及时地通知相关人员电池单体发生漏液的问题。
在某些实施方式中，所述输出模块还用于在所述浓度超标信号中加载所述气体传感器的位置信息以形成所述报警信号并将所述报警信号发出。
如此，报警信号具有气体传感器的位置信息，这样可以根据传感器的位置确定发生漏液的电池单体的位置，便于后序及时处理。
在某些实施方式中，所述气体传感器设置在所述测试箱体的侧面，并且位于所述侧面的高度中线以上。
如此，气体传感器受到的干扰较小，检测的准确性更高。
一种计算机可执行指令的非易失性计算机可读存储介质，当所述计算机可执行指令被一个或多个处理器执行时，使得所述处理器执行以上任一实施方式所述的测试方法。
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施方式的描述中将变得明显和容易理解，其中：
图1是本申请其中一个实施方式的测试方法的流程示意图；
图2是本申请其中一个实施方式的测试箱体的立体图；
图3是本申请其中一个实施方式的测试方法的流程示意图；
图4是本申请其中一个实施方式的测试方法的流程示意图；
图5是本申请其中一个实施方式的测试方法的流程示意图；
图6是本申请其中一个实施方式的测试系统的结构示意图；
图7是本申请其中一个实施方式的测试装置的模块示意图。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
目前，从市场形势的发展来看，动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、 电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。
在电池研发阶段的测试中，电池单体易产生失效或壳体腐蚀破裂产生漏液。在电池单体漏液后，湿气容易进入电池单体内，使得电池单体存在热失控风险。然而，在电池单体产生轻微漏液时，电池单体在短时间内电压、SOC、绝缘值等无异常，难以及时有效地通过电压这些参数检测电池单体是否发生漏液。电池单体在温箱中测试性能时，更加无法有效识别电池单体在温箱内是否发生漏液，导致电池单体漏液失效后无法及时被发现。
为了解决以上问题，申请人通过研究发现，电池电解液通常为碳酸酯类液体，该类液体具有还原性。另外，电池单体在工作循环过程中会产生碳氢化合物、CO等还原性气体。一旦电池单体发生泄露，电解液的挥发物和产气成分一同泄露，使得空气中具备还原性的物质浓度上升。
基于此考虑，申请人通过在温箱上设置气体传感器，通过气体传感器检测试箱体内的还原性气体的浓度，从而根据检测得到的还原性气体的浓度确定电池单体是否发生漏液，解决了电池单体发生漏液难以识别的问题。
请参阅图1和图2，图1是本申请其中一个实施方式的测试方法的流程示意图。图2是本申请其中一个实施方式的测试箱体的立体示意图。
本申请实施方式的测试方法用于电池单体，测试方法包括：
S10，获取气体传感器110输出的CAN信号，气体传感器110设置在测试箱体112上，测试箱体112中放置有电池单体；
S20，基于CAN信号，确认测试箱体112中的预定气体的气体浓度；
S30，在气体浓度大于浓度阈值时，发出浓度超标信号。
具体地，电池单体可以用于使用电池作为电源的用电装置或者使用电池作为储能元件的各种储能系统。用电装置可以为但不限于手机、平板、笔记本电脑、电动玩具、电动工具、电瓶车、电动汽车、轮船、航天器等等。每个电池单体可以为二次电池或一次电池；还可以是锂硫电池、钠离子电池或镁离子电池，但不局限于此。电池单体可呈圆柱体、扁平体、长方体或其它形状等。
气体传感器110可以采用半导体式传感器，半导体式传感器包括金属氧化物或半导体氧化物晶体。在一个例子中，半导体式传感器的工作原理如下：在半导体式传感器预热后，半导体式传感器可以将空气中的氧吸附在晶体表面，晶体表面的活性电子 被转移到吸附的氧气中，从而在晶体的空间电荷层留下正电荷。如此，晶体形成阻碍电子流动的势垒。当气体传感器110周围出现还原性气体时，还原性气体与位于晶体表面带负电荷的氧原子反应，致使晶体表面的氧气密度降低，因此，晶体的晶界中的势垒高度下降，势垒高度的下降引发传感器电阻的下降，产生明显的电信号。
当然，气体传感器110可以其他类型的传感器，例如，气体传感器110为电化学式传感器等传感器。
CAN信号是气体传感器110输出的一种信号形式，CAN信号可以包括气体传感器110的数据生成时间等信息，根据CAN信号，可以获取气体传感器110检测得到的信息。
本申请实施方式中，测试箱体112也可以称为温箱，是一种可以调节箱体内部环境的装置，例如，测试箱体112内部的气温可以调高或者调低。示例性地，可以通过向测试箱体112内通入热风，从而调高测试箱体112的内部气温。又如，测试箱体112内的气体密度可以调高或者调低，示例性地，可以通过抽风机抽取测试箱体112内的气体，从而使得测试箱体112内的气体密度下降。
气体传感器110可以安装在测试箱体112的壁面上，具体地，可以在测试箱体112的壁面上开设通孔，进而把气体传感器110安装在通孔处并部分伸入测试箱体112内，从而使得气体传感器110可以有效检测测试箱体112内的预定气体。
在步骤S20中，预定气体可以为还原性气体，还原性气体例如为一氧化碳、碳氢化合物等气体。如以上所讨论的，当气体传感器110为半导体式传感器时，气体传感器110可以检测还原性气体。如此，通过气体传感器110输出的CAN信号，可以确定预定气体的气体浓度。需要指出的是，确定预定气体的气体浓度，可以为确定气体浓度的具体数值，也可以为确定气体浓度的范围。例如，可以确定气体浓度等于15ppm，也可以为大于15ppm，其中，ppm(parts per million)为预定气体占测试箱体112内的总气体体积的百万分比。
在步骤S30中，浓度阈值是根据确定电池单体是否可以漏液的临界值。浓度阈值可以根据实验获得，例如，浓度阈值为50ppm。也即是说，当气体浓度大于50ppm时，发出浓度超标信号。
浓度超标信号可以模拟信号，也可以是数字信号。示例性地，浓度超标信号为高电平信号。因此，根据浓度超标信号，可以准确地确定测试箱体112内的预定气体的气体浓度超标，进而确定电池单体发生泄漏的现象。
综上，在本申请实施方式的测试方法中，利用设置在测试箱体112气体传感器110监测测试箱体112中预定气体浓度，并在气体浓度大于浓度阈值时，发出浓度超标信号，这样可以根据气体浓度确认电池单体是否存在漏液的故障。
请参阅图3，在某些实施方式中，基于CAN信号，确认测试箱体112中的预定气体的气体浓度(S20)，包括：
S21，基于CAN信号，读取气体传感器110的内部数据；
S22，根据内部数据确定预定气体的气体浓度。
具体地，基于CAN信号的协议，CAN信号可能无法直接加载气体浓度信息，在解析CAN信号后，可能无法直接得到气体浓度信息。因此，通过CAN信号，可以直接读取气体传感器110缓存的内部数据，从而根据气体传感器110的内部数据可以得到预定气体的气体浓度。
例如，CAN信号中具有缓存气体浓度的地址，通过该地址，可以快速地读取气体传感器110的内部数据以确定预定气体的气体浓度。如此，根据气体传感器110的内部数据可以更加准确地确定预定气体的气体浓度。
请参阅图4，在某些实施方式中，根据内部数据确定预定气体的气体浓度(S22)，包括：
S221，获取内部数据的报警位的标志；
S222，在报警位的标志为1时，确定预定气体的气体浓度大于浓度阈值；
S223，在报警位的标志为0时，确定预定气体的气体浓度小于或等于浓度阈值。
具体地，报警位为指示某个事件是否产生的数据存储位。本申请实施方式中，报警位用于指示预定气体的气体浓度与浓度阈值的关系。报警位的标志可以用0或1表示，这样使得外部设备可以容易的读取到报警位的标识。本申请实施方式中，报警位的标志为1时，预定气体的气体浓度大于浓度阈值；报警位的标志为0时，预定气体的气体浓度小于或等于浓度阈值。如此，可以通过读取报警位的标志，确定气体浓度是否超过浓度阈值，进而确定是否发出浓度超标信号。报警位的设置，使得外部设备读取传感器的数据时，更加容易解析，从而使得本申请实施方式的测试方法容易实现。
在某些实施方式中，测试方法包括：
在预定时长内，若气体传感器110检测到的气体浓度大于浓度阈值，将报警位的标志由0修改为1。
具体地，预定时长确定单体电池在测试过程中是否发生漏液的时长。预定时长可 以根据实验确定，例如，预定时长可以为20分钟。如此，通过限制检测时间，可以准确地确定电池单体是否产生漏液现象。
需要指出的是，预定时长的开始时刻可以是测试箱体112刚开始工作的时刻，也可以是测试箱体112工作后的任意时刻；预定时长的结束时刻是从开始时刻计时，达到预定时长后的时刻。
因此，预定时长可以根据计时的开始时刻分为多个。例如，第一个预定时长的开始时刻为第1分钟，结束时刻则为第20分钟；第二个预定时长的开始时刻为第2分钟，结束时刻则为第21分钟。
因此，在任意一个预定时长内，只要检测到的气体浓度大于浓度阈值，则将报警位的标志由0修改为1。
在某些实施方式中，在气体浓度大于浓度阈值时，发出浓度超标信号(S30)，包括：
在气体浓度大于浓度阈值时，控制开关闭合，以使控制电路发出开关量信号，并将开关量信号作为浓度超标信号。
具体地，开关为控制电路通断的器件，开关可以为继电器开关、晶体管开关等元器件，本申请不限制开关的具体类型。控制电路为包括开关并可以产生电信号的电路，当开关闭合时，控制电路可以处于工作状态，控制电路能够产生电信号，当开关断开时，控制电路可以处于非工作状态，控制电路无法产生电信号，控制电路根据开关闭合或断开的状态形成的信号即为开关量信号。开关量信号类似于脉冲信号，开关量信号是断续的信号，不是连续的信号。
因此，通过控制开关的状态，可以使得控制电路发出开关量信号，并且采用开关量信号作为浓度超标信号，信号的解析难度低，有利于后续处理浓度超标信号，处理过程更加简单，使得本申请实施方式的测试方法更加容易实现。
请参阅图5，在某些实施方式中，测试方法还包括：
S40，基于浓度超标信号，发出报警信号，报警信号用于使报警装置114(如图6所示)发出报警。
具体地，报警信号为使报警装置114发出报警的控制信号，或者说，报警装置114可以根据控制信号发出报警。报警信号可以发出不同类型和/或不同等级的报警，以提示电池单体发生漏液的风险。例如，报警装置114可以发出光线报警，并按照红、橙、黄、绿等不同颜色等级表征不同的异常等级。当然，除了颜色，还可以使得报警 装置114发出不同的音色或者音频，以在上述颜色基础上呈现不同的异常等级，或者单独来呈现不同的异常等级。例如报警的时间更长、音色更厚重或音调更高等特征来区分。本申请实施例对报警方式不作限定。
报警装置114可以包括扬声器、显示屏、指示灯。当报警装置114为扬声器的情况下，报警装置114可以发出声音报警；当报警装置114为显示屏的情况下，报警装置114可以发出图像等报警；当报警装置114为指示灯的情况下，报警装置114可以发出光线报警。如此，报警装置114根据报警信号报警，可以及时实现电池单体漏液事件的预警，能够使得相关人员及时获取电池单体发生漏液的问题，便于测试数据(例如漏液时间)的处理，以能及时解决电池单体漏液的问题。
在某些实施方式中，基于浓度超标信号，发出报警信号(S40)，包括：
在浓度超标信号中加载气体传感器110的位置信息以形成报警信号并将报警信号发出。
具体地，在电池单体的测试中，可能同时对多个电池单体进行测试。例如，测试箱体112体的数量为多个，一个测试箱体112体内可以放置一个电池单体，使得一个测试箱体112体可以对一个电池单体进行测试。由于每个测温测试箱体112体上均设置有至少一个气体传感器110，如此，气体传感器110的数量为多个。
为了便于管理多个气体传感器110的检测得到的数据，可以将多个气体传感器110连接到同一个控制器上。为了区分各个气体传感器110的区别，可以对多个气体传感器110进行编码，并且不同编码对应控制器上的不同通讯协议，通过解析通讯协议识别不同位置的气体传感器110，从而可以方便定位气体传感器110和测试箱体112的位置，以及时处理失效的电池单体。
因此，报警信号具有气体传感器110的位置信息，这样可以根据传感器的位置确定发生漏液的电池单体的位置，便于后序及时处理。
请参阅图6，本申请还提供一种测试系统116，本申请实施方式的测试系统116包括气体传感器110和控制电路板118，气体传感器110设置在测试箱体112上，测试箱体112中放置有电池单体。控制电路板118包括通讯模块120，通讯模块120与气体传感器110连接并用于获取气体传感器110输出的CAN信号，及用于基于CAN信号，确认测试箱体112中的预定气体的气体浓度，以及用于在气体浓度大于浓度阈值时，发出浓度超标信号。
具体地，控制电路板118是以印刷电路板为基础，在印刷电路板上布置处理器件、 控制器件等电器元件以形成实现预定功能的集成电路板件。通信模块是控制电路板118上实现特定功能的电路，此处所指的电路包括采用不同的元器件连接形成的回路。通信模块可以包括微控制单元(Microcontroller Unit，MCU)，微控制单元可以实现CAN信号等信号的解析等信号处理工作。因此，控制电路板118的通讯模块120可以实现接收气体传感器110输出的CAN信号，并对CAN信号进行解析等处理后发出浓度超标信号。
由此，本申请实施方式的测试系统116中，利用设置在测试箱体112气体传感器110监测测试箱体112中预定气体浓度，并在气体浓度大于浓度阈值时，发出浓度超标信号，这样可以根据气体浓度确认电池单体是否存在漏液的故障。
在某些实施方式中，通讯模块120还用于基于CAN信号，读取气体传感器110的内部数据；及用于根据内部数据确定预定气体的气体浓度。
如此，根据气体传感器110的内部数据可以更加准确地确定预定气体的气体浓度。
在某些实施方式中，通讯模块120还用于获取内部数据的报警位的标志；及用于在报警位的标志为1时，确定预定气体的气体浓度大于浓度阈值；以及用于在报警位的标志为0时，确定预定气体的气体浓度小于或等于浓度阈值。
如此，可以通过读取报警位的标志，确定气体浓度是否超过浓度阈值，进而确定是否发出浓度超标信号。报警位的设置，使得外部设备读取传感器的数据时，更加容易解析，从而使得本申请实施方式的测试方法容易实现。
在某些实施方式中，气体传感器110用于在预定时长内，若检测到的气体浓度大于浓度阈值，将报警位的标志由0修改为1。
如此，通过限制检测时间，可以准确地确定电池单体是否产生漏液现象。
在某些实施方式中，通讯模块120用于在气体浓度大于浓度阈值时，控制控制电路板118的开关闭合，以使控制电路发出开关量信号；及用于将开关量信号作为浓度超标信号。
因此，通过控制开关的状态，可以使得控制电路发出开关量信号，并且采用开关量信号作为浓度超标信号，信号的解析难度低，有利于后续处理浓度超标信号，处理过程更加简单，使得本申请实施方式的测试方法更加容易实现。需要指出的是，控制电路可以为通讯模块120的部分电路，或者说，通讯模块120包括控制电路。
请参阅图6，在某些实施方式中，控制电路板118还包括输出模块122，输出模块122用于基于浓度超标信号，发出报警信号；
测试系统116还包括报警控制器124，报警控制器124用于根据报警信号控制报警装置114发出报警。
具体地，输出模块122是控制电路板118上实现特定功能的电路，输出模块122具有对浓度超标信号解析的功能。如以上讨论的，通讯模块120输出的浓度超标信号可以为开关量信号，此开关量信号可以被输出模块122获取，使得输出模块122根据开关量信号输出报警信号。
报警控制器124例如为微处理器，报警控制器124可以实现指令的下发，从而使得报警装置114根据报警控制器124下发的指令工作。
如此，报警装置114根据报警信号报警，可以及时地通知相关人员电池单体发生漏液的问题。
在某些实施方式中，输出模块122还用于在浓度超标信号中加载气体传感器110的位置信息以形成报警信号并将报警信号发出。
具体地，如以上所讨论的，测试箱体112可以有多个，一个测试箱体112对应设置有一个气体传感器110，在此基础上，每个气体传感器110可以连接一个通讯模块120，每个通讯模块120可以连接一个输出模块122。也即是说，气体传感器110与输出模块122可以一一对应的关系。气体传感器110的位置信息可以预存在输出模块122中，例如，输出模块122具有编码器，可以通过编码器对气体传感器110进行编码，从而形成气体传感器110的位置信息。在输出模块122收到浓度超标信号后，输出模块122可以对浓度超标信号进行加载气体传感器110的位置信息的处理并形成报警信号。可以理解，此时，报警信号具有气体传感器110的位置信息，报警控制器124可以根据报警信号控制报警装置114发出电池单体失效的位置等报警信息。
如此，报警信号具有气体传感器110的位置信息，这样可以根据传感器的位置确定发生漏液的电池单体的位置，便于现场人员后序及时处理失效的电池单体，避免产生爆炸等风险。
需要指出的是，控制电路板118的数量为多个，每个控制电路板118包括一个通讯模块120和一个输出模块122。控制电路板118的数量也可以为一个，一个控制电路板118包括多个通讯模块120和多个输出模块122，通讯模块120和输出模块122可以一一对应连接。当然，控制电路板118的数量为多个情况下，每个控制电路板118上的通讯模块120和输出模块122的数量可以不相同，但是在多个控制电路板118中，通讯模块120和输出模块122各自的总数量相同，且一个通讯模块120连接对应的一 个输出模块122。
在某些实施方式中，气体传感器110设置在测试箱体112的侧面，并且位于测试箱体112的侧面的高度中线以上。
一般地，测试箱体112可以通过循环风的方式改变测试箱体112内的温度，例如，可以向测试箱体112内通入热风，使得测试箱体112的温度升高。测试箱体112的风口一般位于测试箱体112的前后板的下部。因此，在测试箱体112内，测试箱体112内的下部空间的气体流动性较大，测试箱体112内的上部空间的气体的流动性较小，并且还原性气体一般趋向位于测试箱体112内的上部空间。
测试箱体112的侧面是相对于测试箱体112的前后面和顶底面而言的，测试箱体112的侧面连接测试箱体112的顶底面和前后面，侧面的高度中线为将侧面沿高度方向将侧面划分为高度相等的线条。气体位于侧面的高度中线以上，可以是高度中线穿过气体传感器110，也可以是气体传感器110偏离高度中线。
因此，将气体传感器110设置在测试箱体112的侧面的高度中线以上，使得气体传感器110受到的干扰较小，检测的准确性更高。
在一个例子中，气体传感器110的长宽高为76.8*38*19.5mm，气体传感器110可以安装在测试箱体112的侧面距离顶部约10cm处。
需要指出的是，上述实施方式的测试方法的解释说明适用于本申请的测试系统116，本申请实施方式的测试系统116其他未展开的部分，请参考上述测试方法相应的部分，在此不再赘述。
请参阅图7，本申请实施方式的测试装置126包括获取模块128、确认模块130和发送模块132，获取模块128用于获取气体传感器110输出的CAN信号，气体传感器110设置在测试箱体112上，测试箱体112中放置有电池单体；确认模块130用于基于CAN信号，确认测试箱体112中的预定气体的气体浓度；发送模块132用于在气体浓度大于浓度阈值时，发出浓度超标信号。
本申请实施方式的测试装置126中，利用设置在测试箱体112气体传感器110监测测试箱体112中预定气体浓度，并在气体浓度大于浓度阈值时，发出浓度超标信号，这样可以根据气体浓度确认电池单体是否存在漏液的故障。
在某些实施方式中，确认模块130还用于基于CAN信号，读取气体传感器110的内部数据；及用于根据内部数据确定预定气体的气体浓度。
如此，根据气体传感器110的内部数据可以更加准确地确定预定气体的气体浓度。
在某些实施方式中，确认模块130还用于获取内部数据的报警位的标志；及用于在报警位的标志为1时，确定预定气体的气体浓度大于浓度阈值；以及用于在报警位的标志为0时，确定预定气体的气体浓度小于或等于浓度阈值。
如此，通过报警位的标志，可以确定气体浓度是否超过浓度阈值。
在某些实施方式中，发送模块132用于在气体浓度大于浓度阈值时，控制控制电路板118的开关闭合，以使控制电路发出开关量信号；及用于将开关量信号作为浓度超标信号。
如此，采用开关量信号作为浓度超标信号，有利于后续处理浓度超标信号，处理过程更加简单。
在某些实施方式中，发送模块132用于基于浓度超标信号，发出报警信号；报警信号用于使报警装置114发出报警。如此，报警装置114根据报警信号报警，可以及时地通知相关人员电池单体发生漏液的问题。
在某些实施方式中，发送模块132还用于在浓度超标信号中加载气体传感器110的位置信息以形成报警信号并将报警信号发出。
如此，报警信号具有气体传感器110的位置信息，这样可以根据传感器的位置确定发生漏液的电池单体的位置，便于后序及时处理。
需要指出的是，上述实施方式的测试方法的解释说明适用于本申请的测试装置126，本申请实施方式的测试装置126其他未展开的部分，请参考上述测试方法相应的部分，在此不再赘述。
一种计算机可执行指令的非易失性计算机可读存储介质，当计算机可执行指令被一个或多个处理器执行时，使得处理器执行以上任一实施方式的测试方法。
在本说明书的描述中，参考术语“一个实施方式”、“某些实施方式”、“示意性实施方式”、“示例”、“具体示例”、或“一些示例”等的描述意指结合实施方式或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施方式或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施方式或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施方式或示例中以合适的方式结合。
流程图中或在此以其他方式描述的任何过程或方法描述可以被理解为，表示包括一个或更多个用于实现特定逻辑功能或过程的步骤的可执行指令的代码的模块、片段或部分，并且本申请的优选实施方式的范围包括另外的实现，其中可以不按所示出或 讨论的顺序，包括根据所涉及的功能按基本同时的方式或按相反的顺序，来执行功能，这应被本申请的实施例所属技术领域的技术人员所理解。
在流程图中表示或在此以其他方式描述的逻辑和/或步骤，例如，可以被认为是用于实现逻辑功能的可执行指令的定序列表，可以具体实现在任何计算机可读介质中，以供指令执行系统、装置或设备(如基于计算机的系统、包括处理模块的系统或其他可以从指令执行系统、装置或设备取指令并执行指令的系统)使用，或结合这些指令执行系统、装置或设备而使用。就本说明书而言，"计算机可读介质"可以是任何可以包含、存储、通信、传播或传输程序以供指令执行系统、装置或设备或结合这些指令执行系统、装置或设备而使用的装置。计算机可读介质的更具体的示例(非穷尽性列表)包括以下：具有一个或多个布线的电连接部(电子装置)，便携式计算机盘盒(磁装置)，随机存取存储器(RAM)，只读存储器(ROM)，可擦除可编辑只读存储器(EPROM或闪速存储器)，光纤装置，以及便携式光盘只读存储器(CDROM)。另外，计算机可读介质甚至可以是可在其上打印所述程序的纸或其他合适的介质，因为可以例如通过对纸或其他介质进行光学扫描，接着进行编辑、解译或必要时以其他合适方式进行处理来以电子方式获得所述程序，然后将其存储在计算机存储器中。
应当理解，本申请的实施方式的各部分可以用硬件、软件、固件或它们的组合来实现。在上述实施方式中，多个步骤或方法可以用存储在存储器中且由合适的指令执行系统执行的软件或固件来实现。例如，如果用硬件来实现，和在另一实施方式中一样，可用本领域公知的下列技术中的任一项或他们的组合来实现：具有用于对数据信号实现逻辑功能的逻辑门电路的离散逻辑电路，具有合适的组合逻辑门电路的专用集成电路，可编程门阵列(PGA)，现场可编程门阵列(FPGA)等。
本技术领域的普通技术人员可以理解实现上述实施例方法携带的全部或部分步骤是可以通过程序来指令相关的硬件完成，所述的程序可以存储于一种计算机可读存储介质中，该程序在执行时，包括方法实施例的步骤之一或其组合。
此外，在本申请的各个实施例中的各功能单元可以集成在一个处理模块中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。所述集成的模块如果以软件功能模块的形式实现并作为独立的产品销售或使用时，也可以存储在一个计算机可读取存储介质中。上述提到的存储介质可以是只读存储器，磁盘或光盘等。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (17)

  1. 一种测试方法，用于电池单体，其特征在于，所述测试方法包括：
    获取气体传感器输出的CAN信号，所述气体传感器设置在测试箱体上，所述测试箱体中放置有电池单体；
    基于所述CAN信号，确认所述测试箱体中的预定气体的气体浓度；
    在所述气体浓度大于浓度阈值时，发出浓度超标信号。
  2. 根据权利要求1所述的测试方法，其特征在于，所述基于所述CAN信号，确认所述测试箱体中的预定气体的气体浓度，包括：
    基于所述CAN信号，读取所述气体传感器的内部数据；
    根据所述内部数据确定预定气体的气体浓度。
  3. 根据权利要求2所述的测试方法，其特征在于，所述根据所述内部数据确定预定气体的气体浓度，包括：
    获取所述内部数据的报警位的标志；
    在所述报警位的标志为1时，确定预定气体的气体浓度大于浓度阈值；
    在所述报警位的标志为0时，确定预定气体的气体浓度小于或等于浓度阈值。
  4. 根据权利要求3所述的测试方法，其特征在于，所述测试方法包括：
    在预定时长内，若气体传感器检测到的气体浓度大于浓度阈值，将所述报警位的标志由0修改为1。
  5. 根据权利要求1所述的测试方法，其特征在于，所述在所述气体浓度大于浓度阈值时，发出浓度超标信号，包括：
    在所述气体浓度大于浓度阈值时，控制开关闭合，以使控制电路发出开关量信号，并将所述开关量信号作为所述浓度超标信号。
  6. 根据权利要求1所述的测试方法，其特征在于，所述测试方法还包括：
    基于所述浓度超标信号，发出报警信号，所述报警信号用于使报警装置发出报警。
  7. 根据权利要求6所述的测试方法，其特征在于，所述基于所述浓度超标信号，发出报警信号，包括：
    在所述浓度超标信号中加载所述气体传感器的位置信息以形成所述报警信号并将所述报警信号发出。
  8. 一种测试装置，其特征在于，包括：
    获取模块，用于获取气体传感器输出的CAN信号，所述气体传感器设置在测试箱体上，所述测试箱体中放置有电池单体；
    确认模块，用于基于所述CAN信号，确认所述测试箱体中的预定气体的气体浓度；
    发送模块，用于在所述气体浓度大于浓度阈值时，发出浓度超标信号。
  9. 一种测试系统，其特征在于，包括：
    气体传感器，所述气体传感器设置在测试箱体上，所述测试箱体中放置有电池单体；
    控制电路板，所述控制电路板包括通讯模块，所述通讯模块与所述气体传感器连接并用于获取气体传感器输出的CAN信号，及用于基于所述CAN信号，确认所述测试箱体中的预定气体的气体浓度，以及用于在所述气体浓度大于浓度阈值时，发出浓度超标信号。
  10. 根据权利要求9所述的测试系统，其特征在于，所述通讯模块还用于基于所述CAN信号，读取所述气体传感器的内部数据；及用于根据所述内部数据确定预定气体的气体浓度。
  11. 根据权利要求10所述的测试系统，其特征在于，所述通讯模块还用于获取所述内部数据的报警位的标志；及用于在所述报警位的标志为1时，确定预定气体的气体浓度大于浓度阈值；以及用于在所述报警位的标志为0时，确定预定气体的气体浓度小于或等于浓度阈值。
  12. 根据权利要求11所述的测试系统，其特征在于，所述气体传感器用于在预 定时长内，若检测到的气体浓度大于浓度阈值，将所述报警位的标志由0修改为1。
  13. 根据权利要求11所述的测试系统，其特征在于，所述通讯模块用于在所述气体浓度大于浓度阈值时，控制所述控制电路板的开关闭合，以使控制电路发出开关量信号；及用于将所述开关量信号作为所述浓度超标信号。
  14. 根据权利要求9所述的测试系统，其特征在于，所述控制电路板还包括输出模块，所述输出模块用于基于所述浓度超标信号，发出报警信号；
    所述测试系统还包括报警控制器，所述报警控制器用于根据所述报警信号控制报警装置发出报警。
  15. 根据权利要求14所述的测试系统，其特征在于，所述输出模块还用于在所述浓度超标信号中加载所述气体传感器的位置信息以形成所述报警信号并将所述报警信号发出。
  16. 根据权利要求9所述的测试系统，其特征在于，所述气体传感器设置在所述测试箱体的侧面，并且位于所述侧面的高度中线以上。
  17. 一种计算机可执行指令的非易失性计算机可读存储介质，其特征在于，当所述计算机可执行指令被一个或多个处理器执行时，使得所述处理器执行权利要求1-7中任一项所述的测试方法。
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