Formation and capacity grading temperature probe test system and test method

Abstract

The invention provides a formation and capacity grading temperature probe test system and test method, and relates to the technical field of formation and capacity grading, the formation and capacity grading temperature probe test system comprises an upper computer, a switch, a middle computer, a press test device and a temperature test device; the upper computer, the switch and the middle computer are connected in sequence; the middle computer is respectively connected with the press testing device and the temperature testing device; the temperature testing device comprises a heating block and a first temperature acquisition module; the press machine end device comprises a needle bed and a second temperature acquisition module connected with the needle bed; the needle bed comprises a plurality of press temperature probes; and the press temperature probe is connected with the temperature testing device and is used for acquiring the temperature of the heating block through the second temperature acquisition module. The system provided by the invention provides an innovative solution for lithium battery cell production, and through automatic and accurate temperature probe detection, the production efficiency and safety are improved, the product quality is ensured, and the requirements of a modern production environment are met.

Description

Technical Field

[0001] The present application relates to the technical field of chemical composition and capacity, and in particular to a chemical composition and capacity temperature probe testing system and testing method. Background Art

[0002] In modern industrial production, lithium batteries are an efficient and environmentally friendly energy storage device, and the chemical composition step in their production process is crucial. Chemical composition is a key link in the lithium battery manufacturing process, which involves charging and discharging the battery cells to activate the battery materials and determine the battery capacity. In this process, temperature control is particularly critical because the temperature of the battery cells directly affects the performance and safety of the battery. Therefore, the chemical composition equipment must be able to accurately monitor and control the temperature of the battery cells to ensure the smooth progress of the production process.

[0003] Existing battery cell fractionation equipment usually consists of multiple storage locations, each of which is equipped with a mechanical unit for placing a certain number of battery cells. Each battery cell corresponds to a channel in the battery cell fractionation equipment, so a battery cell fractionation equipment may have dozens or even hundreds of channels. The temperature probes on these channels are responsible for monitoring the temperature of the battery cells to ensure that the battery cells do not overheat during the charging and discharging process. However, due to the large number of channels, it is easy for the temperature probes to be connected to the wrong channel or installed improperly during the production, installation or maintenance of the battery cell fractionation equipment. This requires calibrating the temperature probes of each channel before the equipment is put into use or after maintenance to ensure the accuracy of the temperature data.

[0004] Although temperature monitoring is critical to the safety and performance of lithium batteries, existing battery capacity splitting equipment has significant defects in the detection of temperature probes. First, there is currently a lack of effective detection systems to perform line sequence inspections on temperature probes and determine whether they are good or bad, which makes it impossible to accurately determine whether the data collected by the temperature probes is one-to-one and accurate. Secondly, during the capacity splitting stage, the data collected by the temperature probes is usually used for temperature compensation of the capacity, but there is currently no corresponding detection system to perform precision measurement and comparison on these data, making it impossible to determine the accuracy of the data collected by the probes.

[0005] These defects lead to a series of chain problems. For example, if the temperature data is not collected accurately, the temperature of the battery cell may be too high during the charging and discharging process and cannot be detected in time, thereby increasing the risk of safety accidents. In addition, the traditional detection method, that is, using a multi-channel thermometer to test each channel in turn and comparing the temperature values ​​collected by the thermometer and the temperature probe, has extremely low detection efficiency when facing many channels, which seriously affects the commissioning and maintenance efficiency of the chemical component equipment.

[0006] In summary, existing chemical composition equipment has multiple defects in temperature probe detection, including the lack of line sequence inspection and data accuracy measurement comparison capabilities, as well as low detection efficiency. These problems not only affect the production efficiency of lithium batteries, but may also have a serious impact on the safety and performance of the battery. Therefore, it is particularly urgent for the lithium battery manufacturing industry to develop a new detection system to improve the accuracy and efficiency of temperature probe detection. Summary of the invention

[0007] In a first aspect, the present invention provides a chemical composition temperature probe testing system, comprising:

[0008] A host computer, a switch, a middle computer, a press test device and a temperature test device; wherein the host computer, the switch and the middle computer are connected in sequence; and the middle computer is connected to the press test device and the temperature test device respectively;

[0009] The temperature testing device includes a heating block and a first temperature acquisition module;

[0010] The press bed end device comprises a needle bed and a second temperature acquisition module connected to the needle bed; the needle bed comprises a plurality of press bed temperature probes;

[0011] The press temperature probe is connected to the temperature testing device and is used to collect the temperature of the heating block through the second temperature collection module.

[0012] In an optional embodiment, the temperature testing device includes a switching power supply, a PID temperature controller, a thermocouple temperature sensor, a heating block, a tooling temperature probe, a first temperature acquisition module and a communication module;

[0013] The switch power supply is electrically connected to the communication module, the first temperature acquisition module and the PID temperature controller;

[0014] One end of the communication module is connected to the intermediate computer, and the other end is connected to the first temperature acquisition module and the PID temperature controller respectively;

[0015] The first temperature acquisition module, the tooling temperature probe and the heating block are connected in sequence;

[0016] The PID temperature controller, the thermocouple temperature sensor and the heating block are connected in sequence, and are used to control the heating block through the PID temperature controller and collect the temperature of the heating block through the thermocouple temperature sensor.

[0017] One end of the second temperature acquisition module is connected to the intermediate computer, and the other end is connected to the press temperature probe;

[0018] The press temperature probe is pressed onto the heating block of the temperature testing device.

[0019] In a second aspect, the present invention provides a chemical composition temperature probe testing method of a chemical composition temperature probe testing system as described in any one of the above embodiments, comprising:

[0020] S1, setting a press temperature probe in a needle bed of a press test device to correspond to each channel in a storage location end to be tested; wherein each of the press temperature probes corresponds to one channel; and the press temperature probe corresponds to a heating block pressed on the press temperature probe;

[0021] S2, collecting the first initial temperature of the press temperature probe in each channel, recording the second initial temperature of the PID temperature controller, and obtaining the target line sequence detection temperature through the host computer; wherein the target line sequence detection temperature is greater than the first initial temperature and the second initial temperature;

[0022] S3, based on the target line sequence detection temperature, controls the heating block through the PID temperature controller, performs line sequence detection on each channel in the storage location to be detected in turn, and obtains the line sequence detection result corresponding to each channel; and obtains the comprehensive line sequence result corresponding to the storage location to be detected based on all the line sequence detection results.

[0023] In an optional implementation, in S3, the line sequence detection method includes:

[0024] S31, taking the channel to be detected as the first target channel; controlling the heating block corresponding to the first target channel to heat by the PID temperature controller, and collecting the current test temperature by the thermocouple temperature sensor;

[0025] S32, when the current test temperature reaches the target line sequence detection temperature, controlling the heating block to stop heating through the PID temperature controller;

[0026] S33, after waiting for a first interval time, obtaining a first detection temperature of the heating block corresponding to the first target channel through a second temperature acquisition module based on the temperature probe of the press machine;

[0027] S34, obtaining a line sequence detection result corresponding to the first target channel according to the first detection temperature and the target line sequence detection temperature.

[0028] In an optional implementation, the step S34 of obtaining a line sequence detection result corresponding to the first target channel according to the first detection temperature and the target line sequence detection temperature includes:

[0029] S341, calculating a first temperature difference between the first detection temperature and the target line sequence detection temperature; the calculation formula of the first temperature difference is:

[0030] T Δ第一 =|T 第一 -T 目标线序 |;

[0031] Among them, T Δ第一 represents the first temperature difference; T 第一 represents the first detected temperature; T 目标线序 Represents the target line sequence detection temperature;

[0032] S342, determining whether the first temperature difference is not greater than a preset shipping sampling accuracy corresponding to the press temperature probe;

[0033] S343: If yes, determining that the line sequence detection result is that the channel line sequence of the first target channel corresponding to the first temperature difference is qualified;

[0034] S344: If not, determining that the line sequence detection result is that the channel line sequence of the first target channel corresponding to the first temperature difference is wrong.

[0035] In an optional implementation, in S3, obtaining a comprehensive result of the line sequence corresponding to the to-be-detected storage location end according to all the line sequence detection results includes:

[0036] S34, if the line sequence detection results of all channels in the storage location to be detected are that the channel line sequence is qualified, then the line sequence comprehensive result is that the storage location line sequence is qualified;

[0037] S35, if there is a channel in the storage location to be detected whose line sequence detection result is a line sequence error, then the line sequence comprehensive result is that the line sequence at the storage location is unqualified.

[0038] In an optional implementation, after obtaining the comprehensive line sequence result corresponding to the to-be-detected storage location end according to all the line sequence detection results, S3 further includes:

[0039] S4, if the line sequence comprehensive result is that the line sequence at the storage location is qualified, then the multi-stage precision detection temperature is obtained through the host computer; wherein the multi-stage precision detection temperature includes a plurality of preset sorting temperatures that are arranged in order and different from each other, and the preset sorting temperature with the smallest value is greater than the first initial temperature and the second initial temperature;

[0040] S5, based on the multi-stage precision detection temperature, the heating block is controlled by the PID temperature controller, and precision detection is performed on each channel in the storage location to be detected, and the precision detection result corresponding to each channel is obtained.

[0041] In an optional implementation, in S5, the accuracy detection method includes:

[0042] S51, taking the channel to be detected as the second target channel; controlling the heating of the heating block corresponding to the second target channel by the PID temperature controller; and acquiring the stage sorting results corresponding to each of the preset sorting temperatures arranged from small to large in the multi-stage precision detection temperature by the thermocouple temperature sensor;

[0043] S52, obtaining the accuracy detection result corresponding to the second target channel according to the stage sorting result and the preset sorting temperature corresponding to the stage sorting result.

[0044] In an optional embodiment, the S51, taking the channel to be detected as the second target channel; controlling the heating of the heating block corresponding to the second target channel by the PID temperature controller; and acquiring the stage sorting results corresponding to each of the preset sorting temperatures arranged from small to large in the multi-stage precision detection temperature by the thermocouple temperature sensor, includes:

[0045] S511, controlling the heating block corresponding to the second target channel through the PID temperature controller, starting heating with the preset sorting temperature with the smallest value as the target setting value, and obtaining the current test temperature through the PID temperature controller in real time;

[0046] S512, when the current test temperature reaches the target setting value, controlling the heating block to stop heating;

[0047] S513, after waiting for a second interval time, the press end detection temperature of the heating block corresponding to the second target channel is obtained by the second temperature acquisition module based on the press temperature probe; and the temperature measurement end detection temperature of the heating block is obtained by the first temperature acquisition module based on the tooling temperature probe; and the press end detection temperature and the temperature measurement end detection temperature are used as the stage sorting result of the node corresponding to the preset sorting temperature;

[0048] S514, sequentially taking the adjacent preset sorting temperatures with increasing values ​​as the mold table setting values, repeating S511 to S513 until the stage sorting results of the nodes corresponding to all the preset sorting temperatures are obtained.

[0049] In an optional embodiment, the step S52 of obtaining the accuracy detection result corresponding to the second target channel according to the stage sorting result and the preset sorting temperature corresponding to the stage sorting result includes:

[0050] S521, calculating a second temperature difference between the temperature detected by the temperature measuring end and the temperature detected by the press end; the calculation formula of the second temperature difference is:

[0051] T Δ第二 =T 温测端 -T 压床端 ;

[0052] Among them, T Δ第二 represents the second temperature difference; T 温测端 represents the temperature detected by the temperature measuring end; T 压床端 Represents the detected temperature at the press end;

[0053] S342, determining whether the second temperature difference is not greater than a preset shipping sampling accuracy corresponding to the press temperature probe;

[0054] S343: If yes, determining that the accuracy detection result is that the accuracy of the second target channel corresponding to the second temperature difference is correct;

[0055] S344: If not, determining that the accuracy detection result is that the accuracy of the first target channel corresponding to the first temperature difference is incorrect.

[0056] In the embodiment of the present application, the temperature probe test system for chemical composition and capacity can realize the line sequence detection of the temperature probe of the press and the accuracy detection of the temperature probe sampling data, which greatly improves the efficiency of the temperature probe calibration. Not only can it ensure that the line sequence and accuracy of the temperature probe meet the standards required for production before production, but also the temperature testing system can be sent to the chemical composition and capacity press for automatic detection from time to time during the production process. The automated testing process reduces manual operations, reduces the risks caused by human errors, and improves production efficiency. This automated detection system ensures the stable performance of the temperature probe during the production process, thereby ensuring the accuracy of the probe sampling data. This is crucial for maintaining temperature control during the chemical composition and capacity process of lithium battery cells, and helps prevent overheating and other potential safety issues.

[0057] In short, the chemical composition temperature probe test system provides an innovative solution for lithium battery cell production. Through automated and precise temperature probe detection, it improves production efficiency and safety, ensures product quality, and meets the needs of a modern production environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present application and should not be regarded as limiting the scope of protection of the present application. For ordinary technicians in this field, other related drawings can also be obtained based on these drawings without creative work.

[0059] Figure 1 A schematic diagram showing the device connection of the chemical composition and temperature probe test system in Example 1 of the present application is shown;

[0060] Figure 2 A schematic flow chart of the chemical composition and temperature probe testing method in Example 3 of the present application is shown;

[0061] Figure 3 The channel arrangement of the press temperature probe used in the chemical composition temperature probe test method in Example 3 of the present application is shown;

[0062] Figure 4 A schematic flow chart of the refinement of step S3 in the temperature probe testing method for the composition of the sample in Example 4 of the present application is shown;

[0063] Figure 5 A schematic flow chart of the refinement of step S34 in the method for testing the temperature probe for the composition volume in Example 4 of the present application is shown;

[0064] Figure 6 A schematic diagram of a supplementary process after step S3 (including S4 and S5) in the temperature probe test method for the composition volume in Example 5 of the present application is shown;

[0065] Figure 7 A schematic flow chart of the refinement of step S5 in the method for testing the temperature probe for the composition volume in Example 5 of the present application is shown;

[0066] Figure 8 A schematic flow chart of the refinement of step S51 in the method for testing the temperature probe for the composition volume in Example 5 of the present application is shown;

[0067] Fig. 9 A schematic flow chart of the refinement of step S52 in the method for testing the temperature probe for the composition volume in Example 5 of the present application is shown;

[0068] Fig.10 A schematic diagram of a 2*8 channel arrangement exemplified in the capacity composition temperature probe test method of Example 5 of the present application is shown.

[0069] Explanation of the main component symbols: 100-chemical component capacity temperature probe test system; 1-host computer; 2-switch; 3-mid-position computer; 4-press test device; 41-needle bed; 411-press temperature probe; 42-second temperature acquisition module; 5-temperature test device; 51-first temperature acquisition module; 52-heating block; 53-switching power supply; 54-PID temperature controller; 55-thermocouple temperature sensor; 56-tooling temperature probe; 57-communication module. DETAILED DESCRIPTION

[0070] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0071] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0072] Hereinafter, the terms "including", "having" and their cognates, which may be used in various embodiments of the present application, are intended only to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing items or adding the possibility of one or more features, numbers, steps, operations, elements, components, or combinations of the foregoing items.

[0073] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0074] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as those generally understood by those skilled in the art to which the various embodiments of the present application belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meanings as the contextual meanings in the relevant technical field and will not be interpreted as having idealized meanings or overly formal meanings unless clearly defined in the various embodiments of the present application.

[0075] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0076] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and structure diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in an alternative implementation, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the structure diagram and / or the flow diagram, and the combination of boxes in the structure diagram and / or the flow diagram, can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0077] In addition, the functional modules or units in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0078] If the function is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art, and the computer software product is stored in a storage medium, including several instructions for a computer device (which can be a smart phone, a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk.

[0079] Example 1

[0080] Reference Figure 1 Embodiment 1 of the present invention provides a chemical composition temperature probe testing system, including:

[0081] A host computer, a switch, a middle computer, a press test device and a temperature test device; wherein the host computer, the switch and the middle computer are connected in sequence; and the middle computer is connected to the press test device and the temperature test device respectively.

[0082] The temperature testing device includes a heating block and a first temperature acquisition module;

[0083] The press bed end device comprises a needle bed and a second temperature acquisition module connected to the needle bed; the needle bed comprises a plurality of press bed temperature probes.

[0084] The press temperature probe is connected to the temperature testing device and is used to collect the temperature of the heating block through the second temperature collection module.

[0085] The host computer, as mentioned above, refers to the main control unit of the system, which is responsible for coordinating and managing the entire test process. It is used to control the entire test process, including data acquisition, processing and analysis, so as to ensure the accuracy and efficiency of the test. In this embodiment, the host computer as the central control unit is used to uniformly manage the test process, thereby improving the system's integration and ease of operation. Specifically, an industrial PC or a professional control board can be used to run customized software to implement the control logic.

[0086] As mentioned above, the switch is a network device used to connect different network nodes, to realize data communication between the host computer, the middle computer and other devices, and to ensure the stability and real-time performance of data transmission.

[0087] In this embodiment, a switch is used to realize high-speed and reliable data exchange between multiple devices, thereby improving the communication efficiency and reliability of the system. Specifically, a standard network switch can be used and a corresponding network protocol can be configured.

[0088] As mentioned above, the intermediate computer refers to a control unit located between the host computer and the test device, which plays a connecting role and is used to receive instructions from the host computer to control the press test device and the temperature test device, thereby achieving precise control of the test device. In this embodiment, by providing an intermediate layer (intermediate computer) to handle specific test tasks, the burden on the host computer is reduced and the response speed of the system is improved. Specifically, an embedded system or a PLC (programmable logic controller) can be used.

[0089] The press test device mentioned above refers to a detection device for providing probes. The press test device realizes the simultaneous testing of multiple temperature probes through its precise mechanical structure and electronic acquisition module. This design improves the efficiency and accuracy of the detection process, reduces the risk of human operating errors, and provides a strong guarantee for temperature control in the production process.

[0090] As mentioned above, the temperature testing device refers to a device used to measure and control the temperature of the battery cell. Accurately measure the temperature change of the battery cell during the test process. Provide accurate temperature data for subsequent data analysis. In the embodiment of the present application, the temperature testing device is used to improve the accuracy and reliability of temperature measurement.

[0091] Specifically, the temperature testing device may include a heating block and a first temperature acquisition module, and a thermocouple or a thermistor may be used as a sensor.

[0092] As mentioned above, the heating block is used to provide a constant or adjustable temperature environment, and the first temperature acquisition module is used to measure the temperature of the heating block. The temperature changes of the battery in actual use are simulated to provide a controllable temperature environment for the battery cell, ensuring the performance test of the battery cell at different temperatures. Battery performance is greatly affected by temperature, and the test temperature needs to be precisely controlled. The flexibility and adaptability of the test are improved. Among them, the heating block can use an electric heating element, and the first temperature acquisition module can use a high-precision temperature sensor.

[0093] The above-mentioned press end device includes a needle bed and a second temperature acquisition module. The needle bed is used to fix and connect multiple temperature probes. The second temperature acquisition module is used to collect temperature data of these probes to realize parallel testing of multiple battery cell temperatures, thereby improving test efficiency and coverage.

[0094] The needle bed is used to test the temperature performance of multiple battery cells at the same time, which improves the parallelism of the test and the comprehensiveness of the data. Specifically, the needle bed can adopt a precise mechanical structure, and the second temperature acquisition module can adopt a multi-channel temperature acquisition system.

[0095] The above system takes into account the temperature control and data collection requirements during the battery testing process, and realizes efficient, accurate and safe temperature testing through reasonable structural design and modular layout. Each component has its specific role and setting reason, which together ensures the high performance and reliability of the entire system. Through this design, the quality and efficiency of battery production can be effectively improved.

[0096] Example 2

[0097] Reference Figure 1 , Embodiment 2 of the present invention provides a chemical composition and volume temperature probe testing system. Based on the above embodiment 1, the temperature testing device includes a switching power supply, a PID temperature controller, a thermocouple temperature sensor, a heating block, a tooling temperature probe, a first temperature acquisition module and a communication module;

[0098] The switch power supply is electrically connected to the communication module, the first temperature acquisition module and the PID temperature controller.

[0099] One end of the communication module is connected to the intermediate computer, and the other end is respectively connected to the first temperature acquisition module and the PID temperature controller.

[0100] The first temperature acquisition module, the tooling temperature probe and the heating block are connected in sequence.

[0101] The PID temperature controller, the thermocouple temperature sensor and the heating block are connected in sequence, and are used to control the heating block through the PID temperature controller and collect the temperature of the heating block through the thermocouple temperature sensor.

[0102] As mentioned above, the switching power supply can be a 24V switching power supply, which is used to provide a stable power supply for the entire temperature testing device. The switching power supply is electrically connected to the communication module, the first temperature acquisition module and the PID temperature controller, thereby ensuring that all modules have a stable power supply.

[0103] As mentioned above, the PID temperature controller is used to accurately control the temperature of the heating block. It is connected to the thermocouple temperature sensor and the heating block in sequence. The PID temperature controller adjusts the temperature of the heating block according to the feedback from the thermocouple sensor, thereby achieving precise temperature control to meet the test requirements and improve the accuracy and response speed of temperature control. A mature PID control algorithm can be used, which may be implemented in combination with a microcontroller.

[0104] As mentioned above, the thermocouple temperature sensor is used to measure the actual temperature of the heating block. The thermocouple temperature sensor is connected to the PID temperature controller to provide the temperature data of the heating block to the PID controller to ensure the accuracy of temperature control. Thermocouple sensors have high precision and stability. You can choose a suitable thermocouple type (such as K type, J type, etc.) and install it near the heating block.

[0105] As mentioned above, the heating block is used to provide a constant or adjustable temperature environment. The heating block is connected to the tooling temperature probe in sequence to simulate the temperature change of the battery in actual use. The heating block can provide a consistent test environment to ensure the reliability of the test results. Improve the flexibility and adaptability of the test. The heating block can use an electric heating element and design a suitable heat conduction structure.

[0106] The tooling temperature probe is used to simulate the temperature probe in the battery cell. The tooling temperature probe is connected to the heating block and the first temperature acquisition module in sequence. During the test, the tooling temperature probe is used to provide temperature feedback. The temperature probe of the actual battery cell is simulated to verify its performance and ensure the practicality and accuracy of the test.

[0107] The first temperature acquisition module is used to collect temperature data from each tooling temperature probe. The first temperature acquisition module is connected to the tooling temperature probe and the communication module, so that the temperature data can be collected and transmitted to the host computer or other data processing unit. The first temperature acquisition module is used to centrally manage and analyze data from multiple probes, simplify the data collection process, and improve the efficiency and accuracy of data processing.

[0108] Specifically, an electronic data acquisition system may be used, which may be combined with an analog-to-digital converter (ADC) and a microcontroller.

[0109] The communication module is used for data communication between modules in the system. One end of the communication module is connected to the central computer, and the other end is connected to the first temperature acquisition module and the PID temperature controller, so as to realize data transmission and reception. The communication module can ensure data synchronization and communication between modules in the system, and improve the communication efficiency and reliability of the system.

[0110] The above communication modules may adopt standard industrial communication protocols, such as RS-485, Ethernet, etc.

[0111] As mentioned above, the host computer is connected to the intermediate computer through a switch to realize centralized management and processing of data. As an intermediate node, the intermediate computer connects the press test device and the temperature test device to coordinate data collection and the issuance of control commands. Each component in the system is modular, which is easy to maintain and upgrade. The combination of PID controller and thermocouple sensor provides high-precision temperature control. The design of the first temperature acquisition module and the communication module makes data collection and processing more efficient and accurate.

[0112] Furthermore, one end of the second temperature acquisition module is connected to the intermediate machine, and the other end is connected to the press temperature probe; the press temperature probe is pressed onto the heating block of the temperature testing device.

[0113] As mentioned above, the second temperature acquisition module is an electronic device used to collect temperature data detected by the press temperature probe. One end is connected to the central computer, and the other end is connected to the press temperature probe. Therefore, temperature data can be collected from the press temperature probe, and the data can be transmitted to the central computer, and then transmitted to the host computer or other data processing units by the central computer. It is used for data collection, signal amplification, etc. to achieve accurate temperature measurement of the press temperature probe. The second temperature acquisition module is used to centrally manage and analyze data from multiple press temperature probes to ensure the accuracy and real-time nature of the data.

[0114] As described above, the intermediate computer serves as the central node for data aggregation and distribution, collects data from the second temperature acquisition module, and sends control commands to the temperature testing device to implement data acquisition, signal processing, and temperature control logic.

[0115] The combination of PID controller and thermocouple sensor provides high-precision temperature control. The design of the second temperature acquisition module makes data acquisition and processing more efficient and accurate.

[0116] Example 3

[0117] Reference Figure 2 Embodiment 3 of the present invention provides a chemical composition and volume temperature probe testing method, based on the chemical composition and volume temperature probe testing system in the above embodiments 1-2, wherein the chemical composition and volume temperature probe testing method comprises:

[0118] Step S1, setting a press temperature probe in a needle bed of a press test device to correspond to each channel in a storage location end to be tested; wherein each of the press temperature probes corresponds to one channel; and the press temperature probe corresponds to a heating block pressed on the press temperature probe;

[0119] Step S2, collecting the first initial temperature of the press temperature probe in each channel, recording the second initial temperature of the PID temperature controller, and obtaining the target line sequence detection temperature through the host computer; wherein the target line sequence detection temperature is greater than the first initial temperature and the second initial temperature;

[0120] Step S3, based on the target line sequence detection temperature, control the heating block through the PID temperature controller, perform line sequence detection on each channel in the storage location to be detected in turn, and obtain the line sequence detection result corresponding to each channel; and obtain the comprehensive line sequence result corresponding to the storage location to be detected based on all the line sequence detection results.

[0121] In the above step S1, the press temperature probe in the needle bed of the press test device is set to correspond to each channel in the storage location end to be tested. Before the test starts, each press temperature probe in the press test device needs to be correctly placed on the corresponding channel, each probe corresponds to a channel, and is in contact with the heating block. The position of the press temperature probe on the needle bed is physically configured to ensure that each probe can contact the corresponding heating block.

[0122] Each channel is associated with a specific press temperature probe to prepare for subsequent temperature testing. This ensures that each channel can be tested individually, improving the accuracy and reliability of the test. The probe can be placed in the specified position manually or by automated equipment.

[0123] For example, at the storage location to be tested, define N press temperature probes of the press corresponding to N channels, arranged in A rows and B columns, A×B=N; Figure 3 As shown, each press temperature probe of the needle bed is pressed onto its corresponding heating block.

[0124] In the above step S2, the first initial temperature of the press temperature probe in each channel is collected, the second initial temperature of the PID temperature controller is recorded, and the target line sequence detection temperature is obtained through the host computer. At the beginning of the test, it is necessary to record the initial temperature (first initial temperature) of the press temperature probe of each channel, the current temperature (second initial temperature) of the PID temperature controller, and obtain the preset target line sequence detection temperature from the host computer.

[0125] The temperature data can be collected using a temperature testing device, and the target detection temperature can be set through the host computer to obtain the initial temperature data of each channel and the current temperature of the controller, and the target detection temperature can be determined at the same time.

[0126] The first initial temperature and the second initial temperature are used to perform initial calibration of the system, providing benchmark data before testing to facilitate subsequent comparison and analysis. Temperature data can be automatically collected through the temperature acquisition module, and the host computer user interface sets the target line sequence detection temperature.

[0127] As mentioned above, the target line sequence detection temperature is a target value that can be preset by the host computer.

[0128] In the above step S3, based on the target line sequence detection temperature, the heating block is controlled by the PID temperature controller to perform line sequence detection on each channel in the storage location to be detected in turn, and the line sequence detection result corresponding to each channel is obtained; and based on all the line sequence detection results, a comprehensive line sequence result corresponding to the storage location to be detected is obtained.

[0129] Use a PID temperature controller to heat the heating block to the target line sequence detection temperature, and perform line sequence detection on each channel in turn, record the detection results of each channel, and combine these results to evaluate the line sequence status of the entire storage location.

[0130] The "sequentially" mentioned above means that according to a preset order, line sequence detection is performed on one channel, and after the corresponding line sequence detection result is obtained, the next channel is detected; when the line sequence detection results corresponding to all channels are detected, the overall line sequence comprehensive result corresponding to the storage location to be detected is analyzed to obtain.

[0131] The controller adjusts the temperature of the heating block according to the target temperature, collects the temperature data of the current channel, and compares the difference between the actual temperature and the target temperature, so as to obtain the line sequence detection result of the channel. After obtaining the line sequence detection results of all channels, the comprehensive line sequence results of the entire warehouse end are obtained through overall analysis. Automated line sequence detection improves detection efficiency and ensures the correctness of the line sequence of the temperature probe before production.

[0132] The temperature of the heating block can be adjusted by a PID controller algorithm, and the temperature difference can be analyzed using a differential signal processing algorithm to determine whether the line sequence is correct.

[0133] In summary, in this embodiment, the test method is used to detect the line sequence of the temperature probe of the press and the accuracy of the temperature probe sampling data. The use of the test method will improve the efficiency of the temperature probe calibration, ensuring that the line sequence and accuracy of the temperature probe before production meet the production conditions. During the production process, the test method can also be used to send the components to the press for automatic detection from time to time. The test method realizes the automation of temperature probe detection, improves production efficiency, and ensures the accuracy of the probe sampling data.

[0134] Example 4

[0135] Reference Figure 4 Embodiment 4 of the present invention provides a chemical composition temperature probe test method. Based on the above embodiment 3, in step S3, the line sequence detection method includes:

[0136] Step S31, taking the channel to be detected as the first target channel; controlling the heating block corresponding to the first target channel to heat by the PID temperature controller, and collecting the current test temperature by the thermocouple temperature sensor;

[0137] Step S32, when the current test temperature reaches the target line sequence detection temperature, controlling the heating block to stop heating through the PID temperature controller;

[0138] Step S33, after waiting for a first interval time, obtaining a first detection temperature of the heating block corresponding to the first target channel through a second temperature acquisition module based on the temperature probe of the press machine;

[0139] Step S34, obtaining a line sequence detection result corresponding to the first target channel according to the first detection temperature and the target line sequence detection temperature.

[0140] In the above, in step S31, the channel to be detected is used as the first target channel; the heating block corresponding to the first target channel is controlled by the PID temperature controller, and the current test temperature is collected by the thermocouple temperature sensor. A channel to be detected is selected as the target channel (first target channel), the heating block corresponding to the channel is heated by the PID temperature controller, and the temperature of the heating block is monitored in real time by the thermocouple temperature sensor to obtain the current test temperature.

[0141] During execution, it is necessary to start the PID temperature controller, adjust the temperature of the heating block through the PID temperature controller, and collect temperature data at the same time to obtain the real-time temperature of the heating block of the target channel, that is, the first current test temperature, which can accurately control and monitor the temperature of the heating block to ensure the accuracy of the test.

[0142] Specifically, a closed-loop control algorithm can be used, and a PID controller can adjust the power of the heating element according to the set target temperature and feedback from the thermocouple sensor to achieve precise heating.

[0143] In the above, in step S32, when the first current test temperature is equal to the target line sequence detection temperature, the heating block is controlled by the PID temperature controller to stop heating. That is, when the temperature of the heating block reaches the preset target line sequence detection temperature, the PID temperature controller will control the heating block to stop heating. The PID controller can output a control signal when the target temperature is reached to cut off the heating power supply.

[0144] As described above, in step S33, after the heating block stops heating, a set time interval is waited, and then the temperature of the heating block is collected by the second temperature acquisition module through the press temperature probe to obtain the first detection temperature. By setting the time interval, the system is allowed to reach thermal equilibrium and the accuracy of the temperature reading is improved. Specifically, a timer can be set to wait for a set time after heating stops, and then the value of the temperature probe can be read through the data acquisition system.

[0145] The first interval time can be preset according to factors such as heat conduction time, system response time, thermal balance time, test accuracy requirements, empirical data, etc. For example, in this embodiment, it can be 5 seconds.

[0146] In the above, the collected first detection temperature is compared with the target line sequence detection temperature, and the line sequence is judged whether it is correct according to the difference between the two. The actual temperature is compared with the target temperature, the difference is analyzed, and the line sequence detection result of the target channel is obtained to determine whether the line sequence is correct. In this step, by comparing the actual temperature with the target temperature, the line sequence status can be accurately judged and the wrong connection can be found in time.

[0147] A simple conditional judgment logic may be used. If the first detected temperature is within the allowable error range, the line sequence is considered to be correct; otherwise, the line sequence is incorrect.

[0148] Through this method, the battery capacity temperature probe test system can automatically detect the line sequence of the temperature probe, ensuring that the temperature control during the battery capacity test meets the requirements and improving production efficiency and product quality.

[0149] For further reference, Figure 5The step S34, obtaining a line sequence detection result corresponding to the first target channel according to the first detection temperature and the target line sequence detection temperature, includes:

[0150] S341, calculating a first temperature difference between the first detection temperature and the target line sequence detection temperature; the calculation formula of the first temperature difference is:

[0151] T Δ第一 =|T 第一 -T 目标线序 |;

[0152] Among them, T Δ第一 represents the first temperature difference; T 第一 represents the first detected temperature; T 目标线序 Represents the target line sequence detection temperature;

[0153] As mentioned above, the first detected temperature (T 第一 ) and the preset target line sequence detection temperature (T 目标线序 ), so that the first temperature difference (T Δ第一 ), which represents the deviation between the actual temperature and the target temperature.

[0154] S342, determining whether the first temperature difference is not greater than a preset shipping sampling accuracy corresponding to the press temperature probe;

[0155] S343: If yes, determining that the line sequence detection result is that the channel line sequence of the first target channel corresponding to the first temperature difference is qualified;

[0156] S344: If not, determining that the line sequence detection result is that the channel line sequence of the first target channel corresponding to the first temperature difference is wrong.

[0157] The calculated first temperature difference is compared with the maximum sampling accuracy allowed by the temperature probe set at the factory. If the first temperature difference is within the allowable accuracy range, the line sequence of the channel is considered to be correct. If the first temperature difference exceeds the allowable accuracy range, the line sequence of the channel is considered to be wrong.

[0158] This method improves temperature control and line sequence accuracy during the cell formation process through automated temperature detection and line sequence verification, thereby ensuring the quality and safety of battery production.

[0159] Furthermore, in S3, a comprehensive result of the line sequence corresponding to the to-be-detected storage location is obtained according to all the line sequence detection results, including:

[0160] S34, if the line sequence detection results of all channels in the storage location to be detected are that the channel line sequence is qualified, then the line sequence comprehensive result is that the storage location line sequence is qualified;

[0161] S35, if there is a channel in the storage location to be detected whose line sequence detection result is a line sequence error, then the line sequence comprehensive result is that the line sequence at the storage location is unqualified.

[0162] As described above, the line sequence detection results of all channels in the storage location to be detected are analyzed as a whole. When all the line sequence detection results are that the channel line sequence is qualified, then the comprehensive line sequence result can be determined as the line sequence of the storage location is qualified. Otherwise, if there is a channel with a line sequence error, the result is unqualified.

[0163] For example, the line sequence detection is performed through the following process to obtain the comprehensive line sequence result:

[0164] (1) Assume that N press temperature probes of the press correspond to N channels (N is the total number of channels), arranged in A rows and B columns, A×B=N. Press each press temperature probe of the needle bed onto its corresponding heating block.

[0165] (2) The host computer records the first initial temperature T of the temperature probe of each channel of the press respectively 1_N , record the second initial temperature T2 of the PID temperature controller;

[0166] (3) The host computer sets a target line sequence detection temperature T 3_1*1 , where the target line sequence detection temperature T 3_1*1 Need to be satisfied, T 3_1*1 >T 1_N and T2;

[0167] (4) T 3_1*1 It is given to the first channel (first target channel) and transmitted to the PID temperature control controller. The first target channel heating block is heated according to the set target line sequence detection temperature. The thermocouple temperature sensor transmits and collects the current test temperature T 4_1*1 Give temperature control PID control;

[0168] (5) When the temperature control PID receives feedback from the thermocouple temperature sensor T 4_1*1 Data, etc. 4_1*1 =T 3_1*1 When , the heating block is controlled to stop heating;

[0169] (6) After 5 seconds (first interval time), the second temperature acquisition module uses the press temperature probe corresponding to the first target channel to sample the temperature of the heating block corresponding to the first target channel to obtain the first detection temperature T 5_1*1 ;

[0170] (7) Compare the first detected temperature T 5_1*1 Target line sequence detection temperature T 3_1*1 ;

[0171] If T5_1*1-T 3_1*1 ≤±P℃ (P value is the sampling accuracy value of the temperature probe when it is shipped) is considered to be correct in line sequence; otherwise, if it is greater than P value, it is considered to be wrong in line sequence.

[0172] (8) The N channel probes are tested in sequence until the Nth channel temperature probe line sequence test is completed. If the line sequence of all channels is correct, the line sequence of the line sequence synthesis result is qualified; otherwise, the line sequence of the line sequence of the line sequence synthesis result is unqualified.

[0173] Example 5

[0174] Reference Figure 6 Embodiment 5 of the present invention provides a chemical composition temperature probe testing method. Based on the above embodiment 4, step S3, after obtaining the comprehensive line sequence result corresponding to the to-be-detected storage location end according to all the line sequence detection results, further includes:

[0175] Step S4, if the line sequence comprehensive result is that the line sequence at the storage location is qualified, then the multi-stage precision detection temperature is obtained through the host computer; wherein the multi-stage precision detection temperature includes a plurality of preset sorting temperatures that are arranged in order and different from each other, and the preset sorting temperature with the smallest value is greater than the first initial temperature and the second initial temperature;

[0176] It should be noted that in the chemical composition temperature probe test system, all channels must first pass the line sequence detection and confirm that the line sequence is correct before the accuracy detection can be carried out in order to ensure the accuracy and effectiveness of the entire test process.

[0177] As a basic verification step, wire sequence detection can quickly identify and eliminate connection errors, avoid misleading test results, and improve test efficiency and data quality. In addition, the correct wire sequence is a prerequisite for ensuring the safe operation of the system and can prevent safety issues caused by incorrect temperature readings. The standardized test process also requires wire sequence verification first to ensure that each channel is tested according to established standards to enhance the consistency and comparability of the results. Eliminating wire sequence errors first can also help to quickly locate and repair faulty channels, reduce the impact on the overall production schedule, and reduce additional costs and time consumption. Therefore, this process is set up to ensure the reliability of data, the effectiveness of testing, the safety of the system, and improve production efficiency and product quality.

[0178] In step S4, after confirming that all channel line sequences are qualified, the host computer will obtain a series of different preset temperatures for precision detection. The multi-stage precision detection temperature is a preset temperature value. The host computer generates or receives a set of orderly arranged and different preset sub-test temperatures, thereby obtaining a set of multi-stage temperature values ​​for precision detection.

[0179] Through multi-stage temperature detection, the sampling accuracy of the temperature probe can be more comprehensively evaluated. Specifically, a series of temperature values ​​can be preset in the host computer software or obtained through user input.

[0180] For example, the multi-stage precision detection temperature can be: Ta, Tb...Tx, etc. (Tx>Tb>Ta>Ta1_N and T2, multi-stage precision detection temperature, as long as the temperature is within the detection range, the test can be performed.

[0181] Step S5, based on the multi-stage precision detection temperature, the heating block is controlled by the PID temperature controller, and precision detection is performed on each channel in the storage location to be detected, so as to obtain the precision detection result corresponding to each channel.

[0182] In step S5, the PID temperature controller is used to control the heating block according to the multi-stage precision detection temperature, and the precision detection is performed on each channel. The precision detection can be performed simultaneously on all channels in the storage location to be detected. The heating block of each channel can be heated according to the multi-stage precision detection temperature, and the temperature data can be collected to obtain the precision detection results of each channel at different preset temperatures.

[0183] Precision testing can ensure that the temperature probe can provide accurate data at different temperatures, which improves the meticulousness of the test. Specifically, the automatic control system can be used to perform heating and data collection according to a preset temperature sequence.

[0184] For further reference, Figure 7 In step S5, the accuracy detection method includes:

[0185] Step S51, taking the channel to be detected as the second target channel; controlling the heating of the heating block corresponding to the second target channel by the PID temperature controller; and acquiring the stage sorting results corresponding to each of the preset sorting temperatures arranged from small to large in the multi-stage precision detection temperature by the thermocouple temperature sensor;

[0186] As mentioned above, for the channel to be detected (the second target channel), a PID temperature controller is used to control the corresponding heating block to heat it so that it reaches a series of orderly arranged preset sorting temperatures, and a thermocouple temperature sensor is used to collect the temperature at each temperature point to obtain the stage sorting results. The temperature of the heating block is gradually adjusted to each preset sorting temperature, and data is collected at each temperature point to obtain the temperature reading of the target channel at each preset sorting temperature, i.e., the stage sorting results.

[0187] By testing at multiple preset temperatures, the accuracy of the temperature probe can be fully evaluated over different temperature ranges.

[0188] Specifically, the automatic control system can gradually adjust the temperature of the heating block according to a preset temperature sequence and collect temperature data at each temperature point.

[0189] Step S52, obtaining the accuracy detection result corresponding to the second target channel according to the stage sorting result and the preset sorting temperature corresponding to the stage sorting result.

[0190] In the above, the accuracy test result of the second target channel is evaluated based on the collected stage inspection results and the corresponding preset inspection temperature. That is, the deviation between the inspection results of each stage and the preset inspection temperature is compared, and the accuracy of the temperature probe is analyzed, so as to obtain the accuracy test results of each channel at different preset inspection temperatures, thereby evaluating the temperature measurement accuracy of the entire channel.

[0191] This step provides a systematic approach to evaluate the accuracy of the temperature probe under actual working conditions, which helps to ensure the accuracy of temperature control during battery cell capacity formation.

[0192] For further reference, Figure 8 , the step S51, takes the channel to be detected as the second target channel; controls the heating of the heating block corresponding to the second target channel by the PID temperature controller; and collects the stage sorting results corresponding to each of the preset sorting temperatures arranged from small to large in the multi-stage precision detection temperature by the thermocouple temperature sensor, including:

[0193] Step S511, controlling the heating block corresponding to the second target channel by the PID temperature controller, starting heating with the preset sorting temperature with the smallest value as the target setting value, and obtaining the current test temperature by the PID temperature controller in real time;

[0194] As mentioned above, first select the channel to be tested as the second target channel, use the PID temperature controller to control the heating of the heating block corresponding to the channel, and obtain the current test temperature from the PID controller in real time. In this step, the heating process is started, and the temperature of the heating block is dynamically monitored to obtain real-time temperature data during the heating process, so that the temperature can be monitored in real time to ensure the accuracy and safety of the heating process.

[0195] Specifically, the temperature data can be read in real time through a temperature sensor connected to the PID controller.

[0196] The target setting value mentioned above is the temperature rise target parameter for heating the heating block.

[0197] Step S512, when the current test temperature reaches the target setting value, controlling the heating block to stop heating;

[0198] In this step, since the preset sorting temperature with the smallest value is used as the starting point, when the real-time temperature reaches the minimum preset sorting temperature, that is, the current target setting value, the heating block is controlled to stop heating. The real-time temperature is compared with the preset minimum sorting temperature. When the two are equal, a command to stop heating is sent to ensure that the accuracy detection is performed at the preset temperature, thereby improving the accuracy of the test.

[0199] Step S513, after waiting for a second interval time, the press end detection temperature of the heating block corresponding to the second target channel is obtained by the second temperature acquisition module based on the press temperature probe; and the temperature measurement end detection temperature of the heating block is obtained by the first temperature acquisition module based on the tooling temperature probe; and the press end detection temperature and the temperature measurement end detection temperature are used as the stage sorting result of the node corresponding to the preset sorting temperature;

[0200] In the above, after stopping heating, wait for a fixed second interval time, then use the second temperature acquisition module to collect the detection temperature of the press end of the heating block through the press temperature probe, and use the first temperature acquisition module to collect the detection temperature of the temperature measuring end of the heating block through the tooling temperature probe. After stopping heating, wait for a period of time, and then obtain temperature data from the two temperature acquisition modules, so as to obtain the temperature readings of the press end and the temperature measuring end at the minimum preset inspection temperature.

[0201] By comparing the temperature readings at both ends, the temperature uniformity of the heating block and the accuracy of the probe's response can be evaluated.

[0202] As mentioned above, the second interval time is a pre-set time interval parameter. When determining the second interval time, multiple key factors need to be considered comprehensively to ensure the accuracy and effectiveness of the temperature test. First, it is necessary to ensure that the heating block has sufficient thermal equilibrium time to achieve internal temperature consistency. Secondly, the response time of the temperature sensor and the data acquisition system should be considered to ensure that they can accurately capture and record temperature changes. In addition, the heat conduction time from the heating block to the temperature probe is also crucial, especially when there is thermal resistance or poor contact between the probe and the heating block. Depending on the accuracy requirements of the test, a longer stabilization time may be required to ensure that the collected data can accurately reflect the actual temperature. At the same time, drawing on the empirical data of similar systems or previous experiments can provide valuable references for setting the second interval time. Safety considerations should not be ignored. To avoid overheating, the interval time must be short enough to ensure that the system does not continue to heat after reaching the target temperature. Finally, the performance of the heating block and the temperature sensor will also affect the determination of the second interval time. Usually, high-performance equipment requires a shorter stabilization time. These factors together determine the optimal setting of the second interval time to achieve efficient and accurate temperature testing. In this embodiment, the second time interval is set to 10 seconds.

[0203] Step S514, sequentially taking the adjacent preset sorting temperatures with increasing values ​​as the mold table setting values, repeating S511 to S513 until the stage sorting results of the nodes corresponding to all the preset sorting temperatures are obtained.

[0204] As described above, adjacent preset sorting temperatures with increasing values ​​are used in turn as the setting values ​​of the mold table, that is, on the basis of the preset sorting temperature with the smallest value, a larger preset sorting temperature adjacent to the preset sorting temperature with the smallest value is selected each time, that is, the next preset sorting temperature is selected as the target setting value, and steps S511 and S513 are repeated, and the heating block temperature is repeatedly controlled according to the target setting value, and the detection temperature of the press end and the temperature measuring end under the node of the target setting value is obtained, until the corresponding detection temperatures of the press end and the temperature measuring end are obtained for all nodes (stages) of the preset sorting temperatures.

[0205] The above process of heating, stopping heating, and collecting temperature is repeated for each preset sorting temperature. A set of detection temperatures at the press end and the temperature measurement end are obtained for each preset sorting temperature, i.e., the stage sorting result. By testing at multiple temperature points, the accuracy and consistency of the temperature probe in the entire temperature range can be fully evaluated.

[0206] Specifically, the automatic control system can be used to perform tests step by step according to a preset temperature sequence and record data at each temperature point.

[0207] For further reference, Fig. 9The step S52, obtaining the accuracy detection result corresponding to the second target channel according to the stage sorting result and the preset sorting temperature corresponding to the stage sorting result, includes:

[0208] Step S521, calculating a second temperature difference between the temperature detected by the temperature measuring end and the temperature detected by the press end; the calculation formula of the second temperature difference is:

[0209] T Δ第二 =|T 温测端 -T 压床端 |;

[0210] Among them, T Δ第二 represents the second temperature difference; T 温测端 represents the temperature detected by the temperature measuring end; T 压床端 Represents the detected temperature at the press end;

[0211] As described above, the difference between the temperature detected at the temperature measuring end and the temperature detected at the press end is calculated. By comparing the temperature difference at both ends, the temperature uniformity of the heating block and the response accuracy of the probe can be evaluated.

[0212] Step S522, determining whether the second temperature difference is not greater than a preset shipping sampling accuracy corresponding to the press temperature probe;

[0213] Comparing the calculated second temperature difference with the preset shipping sampling accuracy of the press temperature probe provides a method to determine whether the accuracy of the temperature probe meets the factory standard, ensuring the accuracy of the data.

[0214] Step S523: If yes, determining that the accuracy detection result is that the accuracy of the second target channel corresponding to the second temperature difference is correct;

[0215] Step S524: if not, it is determined that the accuracy detection result is that the accuracy of the first target channel corresponding to the first temperature difference is incorrect.

[0216] If the second temperature difference is within the allowable accuracy range, the accuracy of the channel is considered to be correct. Conversely, if the second temperature difference exceeds the allowable accuracy range, the accuracy of the channel is considered to be incorrect. This method improves the temperature control and accuracy of the battery cell during the cell filling process through automated temperature detection and accuracy verification, thereby ensuring the quality and safety of battery production.

[0217] For example, the accuracy test is performed through the following process to obtain the accuracy test result:

[0218] (1)Reference Fig.10Based on the above definition, N press temperature probes of the press correspond to N channels (N is the total number of channels), arranged in A rows and B columns, A×B=N. Each press temperature probe of the needle bed is pressed on its corresponding heating block.

[0219] (2) The host computer records the first initial temperature T of the temperature probe of each channel of the press respectively a1_N , record the second initial temperature T of the PID temperature controller a2 ; In order to improve accuracy, the first initial temperature and the second initial temperature here can be redefined and obtained, which is different from the line sequence detection.

[0220] (3) The host computer sets the multi-stage precision detection temperature T a 、T b ……T x etc., where T a 、T b ……T x X preset inspection temperatures are independent, ordered, and different from each other, and meet T x >T b >T a >T a1_N and T a2 ; Multi-stage precision temperature detection, testing can be performed as long as the temperature is within the detection range.

[0221] (4) The multi-stage precision detection temperature is transmitted to the PID temperature control controller, and the preset sorting temperatures are selected from the multi-stage precision detection temperature in order from small to large as the target setting value; first, the smallest preset sorting temperature T is selected. a As a target setting value;

[0222] (5) Control the heating blocks of each channel (can be simultaneous) to heat according to the target setting value, and the thermocouple temperature sensor transmits and collects the current detection temperature T 3_N Give to PID temperature controller;

[0223] (6) When the PID temperature controller receives the feedback of the thermocouple temperature sensor, the current detection temperature T 3_N Data, Composite T 3_N =T a When , the heating block stops heating;

[0224] (7) After waiting for 10 seconds (the second interval time), the second temperature acquisition module samples the temperature of the heating block of each channel based on the press temperature probe of each channel to obtain the press end detection temperature T a5_N ; At the same time, the temperature T of the temperature measuring end of the heating block is obtained based on the temperature probe of the tooling a6_N ;

[0225] (8) Ta5_N and T a6-N The stage sorting result of the node corresponding to the preset sorting temperature; when the sampling of the stage sorting result of the node is completed, the heating block continues to be heated to the next preset sorting temperature T b Heat as the target setting value; wait for T b3_N =T b When , the heating block stops heating;

[0226] (9) After 10 seconds, the second temperature acquisition module samples the temperature of the heating block of each channel based on the temperature probe of the press bed of each channel to obtain the detection temperature T at the press bed end. b5_N ; At the same time, the temperature T of the temperature measuring end of the heating block is obtained based on the temperature probe of the tooling b6_N ;

[0227] (10) Repeat the above steps (5) to (9) until the last target setting value T is reached. x , that is, the press end detection temperature T is obtained by collecting the first temperature collection module x5_N The second temperature acquisition module acquires the press end detection temperature T x6_N .

[0228] (11) For each channel (such as the second target channel), calculate the second temperature difference between the temperature detected by the temperature measuring end and the temperature detected by the press end of each node; that is, the sampling accuracy of the press temperature probe:

[0229] If T x6_N*N -T x5_N*N ≤P (the set values ​​of x are sorted from a, b, c, and so on; the P value is the sampling accuracy value of the temperature probe when it is shipped), then the accuracy test result is that the accuracy of the second target channel corresponding to the second temperature difference is correct;

[0230] If T x6_N*N -T x5_N*N >P, it is determined that the accuracy detection result is that the accuracy of the first target channel corresponding to the first temperature difference is incorrect.

[0231] For 2*8 channels, based on multi-segment precision detection temperature (30°C, 33°C, 36°C), and P (P=1), the specific test results are as follows:

[0232] Table 1. Test results of specific examples in Example 5

[0233]

[0234] In the above table, the units of the target setting value, the temperature detected by the temperature measuring end, and the temperature detected by the press end are all in °C; in the accuracy test results, OK means that the accuracy test result is that the accuracy of the second target channel corresponding to the second temperature difference is correct; PASS means that the accuracy test result is that the accuracy of the first target channel corresponding to the first temperature difference is incorrect.

[0235] In this experiment, the preset delivery sampling accuracy is 1. As can be seen from the results in Table 1, the accuracy test results of most channels are "OK", indicating that the temperature probe measurement results of these channels differ from the detection temperature at the press end by less than 1°C, which meets the preset accuracy requirements. The accuracy test results of a few channels are "PASS", indicating that the temperature probe measurement results of these channels differ from the detection temperature at the press end by more than 1°C, which does not meet the preset accuracy requirements. These channels may require further inspection or calibration. For example: The second temperature difference of channel number 2*2 is 4.51°C, which is much larger than the preset 1°C accuracy, so it is judged as "PASS". The second temperature difference of channel number 2*4 is 3°C, which also exceeds the preset accuracy requirements and is also judged as "PASS".

[0236] In summary, this experiment provides a systematic method to evaluate the accuracy of each channel temperature probe, ensuring their reliability and accuracy in actual use. For channels that fail the test, appropriate measures need to be taken to solve the problem to ensure the stability and safety of the entire system.

[0237] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A chemical composition temperature probe test system, characterized in that: include: A host computer, a switch, a middle computer, a press test device and a temperature test device; wherein the host computer, the switch and the middle computer are connected in sequence; and the middle computer is connected to the press test device and the temperature test device respectively; The temperature testing device includes a heating block and a first temperature acquisition module; The press bed end device comprises a needle bed and a second temperature acquisition module connected to the needle bed; the needle bed comprises a plurality of press bed temperature probes; The press temperature probe is connected to the temperature testing device and is used to collect the temperature of the heating block through the second temperature collection module.

2. The chemical composition temperature probe test system according to claim 1, characterized in that: The temperature testing device includes a switching power supply, a PID temperature controller, a thermocouple temperature sensor, a heating block, a tooling temperature probe, a first temperature acquisition module and a communication module; The switch power supply is electrically connected to the communication module, the first temperature acquisition module and the PID temperature controller; One end of the communication module is connected to the intermediate computer, and the other end is connected to the first temperature acquisition module and the PID temperature controller respectively; The first temperature acquisition module, the tooling temperature probe and the heating block are connected in sequence; The PID temperature controller, the thermocouple temperature sensor and the heating block are connected in sequence, and are used to control the heating block through the PID temperature controller, and collect the temperature of the heating block through the thermocouple temperature sensor; One end of the second temperature acquisition module is connected to the intermediate computer, and the other end is connected to the press temperature probe; The press temperature probe is pressed onto the heating block of the temperature testing device.

3. A chemical composition temperature probe testing method of the chemical composition temperature probe testing system according to any one of claims 1 to 2, characterized in that: include: S1, setting a press temperature probe in a needle bed of a press test device to correspond to each channel in a storage location end to be tested; wherein each of the press temperature probes corresponds to one channel; and the press temperature probe corresponds to a heating block pressed on the press temperature probe; S2, collecting the first initial temperature of the press temperature probe in each channel, recording the second initial temperature of the PID temperature controller, and obtaining the target line sequence detection temperature through the host computer; wherein the target line sequence detection temperature is greater than the first initial temperature and the second initial temperature; S3, based on the target line sequence detection temperature, controls the heating block through the PID temperature controller, performs line sequence detection on each channel in the storage location to be detected in turn, and obtains the line sequence detection result corresponding to each channel; and obtains the comprehensive line sequence result corresponding to the storage location to be detected based on all the line sequence detection results.

4. The method for testing the temperature of the chemical composition volume according to claim 3, characterized in that: In S3, the line sequence detection method includes: S31, taking the channel to be detected as the first target channel; controlling the heating block corresponding to the first target channel to heat by the PID temperature controller, and collecting the current test temperature by the thermocouple temperature sensor; S32, when the current test temperature reaches the target line sequence detection temperature, controlling the heating block to stop heating through the PID temperature controller; S33, after waiting for a first interval time, obtaining a first detection temperature of the heating block corresponding to the first target channel through a second temperature acquisition module based on the temperature probe of the press machine; S34, obtaining a line sequence detection result corresponding to the first target channel according to the first detection temperature and the target line sequence detection temperature.

5. The method for testing the temperature of the chemical composition volume according to claim 4, characterized in that: The step S34, obtaining a line sequence detection result corresponding to the first target channel according to the first detection temperature and the target line sequence detection temperature, includes: S341, calculating a first temperature difference between the first detection temperature and the target line sequence detection temperature; the calculation formula of the first temperature difference is: T Δ第一 =|T 第一 -T 目标线序 |; Among them, T Δ第一 represents the first temperature difference; T 第一 represents the first detected temperature; T 目标线序 Represents the target line sequence detection temperature; S342, determining whether the first temperature difference is not greater than a preset shipping sampling accuracy corresponding to the press temperature probe; S343: If yes, determining that the line sequence detection result is that the channel line sequence of the first target channel corresponding to the first temperature difference is qualified; S344: If not, determining that the line sequence detection result is that the channel line sequence of the first target channel corresponding to the first temperature difference is wrong.

6. The method for testing the temperature of the chemical composition volume according to claim 5, characterized in that: In S3, a comprehensive result of the line sequence corresponding to the to-be-detected storage location is obtained according to all the line sequence detection results, including: S34, if the line sequence detection results of all channels in the storage location to be detected are that the channel line sequence is qualified, then the line sequence comprehensive result is that the storage location line sequence is qualified; S35, if there is a channel in the storage location to be detected whose line sequence detection result is a line sequence error, then the line sequence comprehensive result is that the line sequence at the storage location is unqualified.

7. The method for testing the temperature of the chemical composition volume according to claim 6, characterized in that: After obtaining the line sequence comprehensive result corresponding to the to-be-detected storage location end according to all the line sequence detection results, S3 further includes: S4, if the line sequence comprehensive result is that the line sequence at the storage location is qualified, then the multi-stage precision detection temperature is obtained through the host computer; wherein the multi-stage precision detection temperature includes a plurality of preset sorting temperatures that are arranged in order and different from each other, and the preset sorting temperature with the smallest value is greater than the first initial temperature and the second initial temperature; S5, based on the multi-stage precision detection temperature, the heating block is controlled by the PID temperature controller, and precision detection is performed on each channel in the storage location to be detected, and the precision detection result corresponding to each channel is obtained.

8. The method for testing the temperature of the chemical composition volume according to claim 7, characterized in that: In S5, the accuracy detection method includes: S51, taking the channel to be detected as the second target channel; controlling the heating of the heating block corresponding to the second target channel by the PID temperature controller; and acquiring the stage sorting results corresponding to each of the preset sorting temperatures arranged from small to large in the multi-stage precision detection temperature by the thermocouple temperature sensor; S52, obtaining the accuracy detection result corresponding to the second target channel according to the stage sorting result and the preset sorting temperature corresponding to the stage sorting result.

9. The method for testing the temperature of the chemical composition volume according to claim 8, characterized in that: In S51, the channel to be detected is used as the second target channel; and the heating blocks corresponding to the second target channels are respectively controlled to heat by the PID temperature controller; The stage inspection results corresponding to each of the preset inspection temperatures arranged from small to large in the multi-stage precision detection temperatures are collected by the thermocouple temperature sensor, including: S511, controlling the heating block corresponding to the second target channel by the PID temperature controller, starting heating with the preset sorting temperature with the smallest value as the target setting value, and obtaining the current test temperature by the PID temperature controller in real time; S512, when the current test temperature reaches the target setting value, controlling the heating block to stop heating; S513, after waiting for a second interval time, the press end detection temperature of the heating block corresponding to the second target channel is obtained by the second temperature acquisition module based on the press temperature probe; and the temperature measurement end detection temperature of the heating block is obtained by the first temperature acquisition module based on the tooling temperature probe; and the press end detection temperature and the temperature measurement end detection temperature are used as the stage sorting result of the node corresponding to the preset sorting temperature; S514, sequentially taking the adjacent preset sorting temperatures with increasing values ​​as the mold table setting values, repeating S511 to S513 until the stage sorting results of the nodes corresponding to all the preset sorting temperatures are obtained.

10. The method for testing the temperature of the chemical composition volume according to claim 9, characterized in that: The step S52, obtaining the accuracy detection result corresponding to the second target channel according to the stage sorting result and the preset sorting temperature corresponding to the stage sorting result, includes: S521, calculating a second temperature difference between the temperature detected by the temperature measuring end and the temperature detected by the press end; the calculation formula of the second temperature difference is: T Δ第二 =|T 温测端 -T 压床端 |; Among them, T Δ第二 represents the second temperature difference; T 温测端 represents the temperature detected by the temperature measuring end; T 压床端 Represents the detected temperature at the press end; S342, determining whether the second temperature difference is not greater than a preset shipping sampling accuracy corresponding to the press temperature probe; S343: If yes, determining that the accuracy detection result is that the accuracy of the second target channel corresponding to the second temperature difference is correct; S344: If not, determine that the accuracy detection result is that the accuracy of the first target channel corresponding to the first temperature difference is incorrect.

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