Battery testing method based on optical fiber and related equipment

Abstract

The invention relates to an optical fiber-based battery testing method and related equipment. The method comprises the following steps: determining a light source type for testing based on a tested battery; performing multi-point synchronous detection on the tested battery through an optical fiber by using a test light source matched with the light source type to obtain a film thickness parameter of the tested battery; and obtaining a test result of the tested battery based on the film thickness parameter. The problem that the accuracy of a test result obtained through single-measuring-point detection is low due to the fact that the film thicknesses of all positions of the surface of the battery are not necessarily the same due to the manufacturing process is solved.

Description

Background Art

[0002] With the development of lossy quartz optical fiber and the continuous maturity of optical fiber technology, the previous spectral system lighting technology has been changed, so that the spectral signal of remote samples can be easily input into the spectral detection system. Fiber optic spectroscopy technology has been widely used in optical detection as a fast and non-destructive detection method. In the photovoltaic industry, when testing the qualified film thickness of solar cells, it is necessary to use optical fiber to transmit the light source to the surface of the cell and transmit the light reflected back (or transmitted) from the surface of the cell to the spectrometer, and analyze the film thickness to complete the cell film thickness test. Single measurement point detection is generally used during the test. However, due to the manufacturing process of the cell, the film thickness at each position on its surface is not necessarily the same, resulting in low accuracy of the test results obtained by single measurement point detection. Summary of the invention

[0003] In order to overcome the problem that the film thickness at various locations on the battery surface may not be the same due to the manufacturing process, resulting in low accuracy of the test results obtained by single measuring point detection, the present application provides a fiber-based battery testing method and related equipment.

[0004] In the first aspect, in order to solve the above technical problems, the present application provides a battery testing method based on optical fiber, comprising:

[0005] determining the type of light source to use for testing based on the test battery;

[0006] Using a test light source that matches the light source type, perform multi-point synchronous detection on the test battery through optical fiber to obtain the film thickness parameters of the test battery;

[0007] The test results of the test cell are obtained based on the film thickness parameters.

[0008] In a second aspect, the present application further provides a battery testing device, which applies a battery testing method based on optical fiber; the device includes a test light source, an optical fiber and a detection module, the optical fiber includes a light source end, a first branch end and a second branch end; the test light source is connected to the light source end, the first branch end is connected to the detection module, and the second branch end is connected to a probe;

[0009] When testing the test battery, the test light source is controlled to emit light, and the probe and detection module are used to perform multi-point synchronous detection on the test battery through optical fiber to obtain the film thickness parameters of the test battery, so as to obtain the test result of the test battery based on the film thickness parameters.

[0010] In a third aspect, the present application also provides a battery testing system based on optical fiber, comprising:

[0011] a determination module for determining a type of light source for testing based on a test battery;

[0012] A detection module is used to use a test light source that matches the light source type to perform multi-point synchronous detection on the test battery through optical fibers to obtain film thickness parameters of the test battery;

[0013] The module is used to obtain the test result of the test battery based on the film thickness parameter.

[0014] In a fourth aspect, the present application also provides a computing device, including a memory, a processor, and a program stored in the memory and running on the processor, and when the processor executes the program, the steps of the optical fiber-based battery testing method as described above are implemented.

[0015] In a fifth aspect, the present application also provides a computer-readable storage medium, in which instructions are stored. When the instructions are executed on a terminal device, the terminal device executes the steps of a fiber-based battery testing method.

[0016] The beneficial effects of the present application are: by determining the light source type corresponding to the test battery, and using the test light source that matches the light source type, the test battery is subjected to multi-point synchronous detection through optical fiber to obtain the film thickness parameters of the test battery, and the test results of the test battery are obtained based on the film thickness parameters. In this way, by performing multi-point synchronous detection on the test battery, the film thickness parameters of each position on the surface of the test battery can be detected at the same time, and the film thickness parameters show the relatively comprehensive overall film thickness of the test battery. And the film thickness parameters are taken into account when determining the test results, that is, the relatively comprehensive overall film thickness of the test battery is taken into account, so that the accuracy of the test results is higher. At the same time, the present application detects and obtains the film thickness parameters of each position on the surface of the test battery at the same time, avoiding the film thickness error caused by changes in the test environment due to external interference when performing single-point detection on each position on the surface of the test battery at different times, thereby further improving the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic flow chart of a battery testing method based on optical fiber according to an exemplary embodiment of the present application;

[0018] Figure 2 A schematic diagram of a battery testing device according to an exemplary embodiment of the present application;

[0019] Figure 3 This is a schematic diagram of the structure of a multi-channel optical fiber in a battery testing device in an exemplary embodiment of the present application;

[0020] Figure 4 This is a structural schematic diagram of a functional module corresponding to a battery testing device in an exemplary embodiment of the present application;

[0021] Figure 5The figure is a schematic structural diagram of a battery testing system based on optical fiber according to an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0022] The following examples are provided to further explain and supplement the present application and do not constitute any limitation to the present application.

[0023] The following describes an optical fiber-based battery testing method and related equipment according to an embodiment of the present application in conjunction with the accompanying drawings.

[0024] An optical fiber-based battery testing method is disclosed in an embodiment of the present application. The method is applied to a terminal device. In the present application scheme, the terminal device is used as the execution subject to illustrate the present application scheme. The terminal device is used to execute the steps of an optical fiber-based battery testing method.

[0025] See also Figure 1 , Figure 1 An optical fiber-based battery testing method is shown as an exemplary embodiment of the present application. Figure 1 As shown, the present application provides a fiber-based battery testing method, comprising:

[0026] Step S11, determining the type of light source used for testing based on the test battery;

[0027] Step S12, using a test light source that matches the light source type, to perform multi-point synchronous detection on the test battery through an optical fiber to obtain a film thickness parameter of the test battery;

[0028] Step S13, obtaining the test result of the test battery based on the film thickness parameter.

[0029] The present embodiment provides a fiber-based battery testing method, which determines the light source type corresponding to the test battery, and uses a test light source that matches the light source type to perform multi-point synchronous detection on the test battery through optical fiber to obtain the film thickness parameters of the test battery, and obtains the test results of the test battery based on the film thickness parameters. In this way, by performing multi-point synchronous detection on the test battery, the film thickness parameters of each position on the surface of the test battery can be detected at the same time, and the film thickness parameters show the relatively comprehensive overall film thickness of the test battery. And the film thickness parameters are taken into account when determining the test results, that is, the relatively comprehensive overall film thickness of the test battery is taken into account, so that the accuracy of the test results is higher. At the same time, the present embodiment detects and obtains the film thickness parameters of each position on the surface of the test battery at the same time, avoiding the film thickness error caused by changes in the test environment due to external interference when performing single-point detection on each position on the surface of the test battery at different times, thereby further improving the accuracy of the test results.

[0030] Optionally, determining the type of light source to use for testing based on a test battery includes:

[0031] Obtaining manufacturing parameters when manufacturing the test battery;

[0032] Obtaining target wavelength light based on manufacturing parameters;

[0033] The type of a light source that emits light of a target wavelength is obtained and used as the type of light source for testing.

[0034] In this embodiment, the manufacturing parameters when manufacturing the test battery can reflect the manufacturing environment of the test battery and the possible parameter conditions of the test battery. The target wavelength light is obtained based on the possible parameter conditions corresponding to the manufacturing parameters, and the type of light source emitting the target wavelength light is used as the type of light source for testing. In this way, under the manufacturing parameters, no matter what the possible parameter conditions of the test battery are, the test battery can be tested using the light source emitting the target wavelength light, and an effective film thickness parameter can be obtained. The test result of the test battery is obtained based on the effective film thickness parameter, which can further improve the accuracy of the test result.

[0035] In this embodiment, the light source types include LED light sources, halogen light sources, xenon light sources, etc. The LED light source can be combined with a suitable LED light source according to the required spectral range. The available wavelength range of the halogen light source is 360-2500nm, and the available wavelength range of the xenon light source is 200-2500nm. The surface films of different batteries respond differently to light of different wavelengths. For films of general thickness, LED light sources or halogen light sources can be selected, such as the thickness of polycrystalline silicon films; for thinner films, short-wavelength ultraviolet light needs to be supplemented to observe interference phenomena. At this time, xenon lamps or deuterium lamps are required as light sources, such as aluminum oxide films.

[0036] Optionally, the manufacturing parameters include a preset coating thickness, a film material type, and a film thickness manufacturing error;

[0037] Obtaining target wavelength light based on manufacturing parameters, including:

[0038] Based on the preset coating thickness and the film thickness manufacturing error, the reference film thickness range of the test battery is obtained;

[0039] A battery membrane with a thickness within a reference film thickness range and a type of membrane material is used as a target membrane;

[0040] Find the target wavelength light corresponding to the light interference phenomenon with the target film from the preset table.

[0041] In this embodiment, based on the preset coating thickness and film thickness manufacturing error, the possible parameter conditions of the test battery can be reflected, and each of the possible parameter conditions is combined to obtain the reference film thickness range of the test battery, and the battery membrane with a thickness in the reference film thickness range and a film material type is used as the target membrane, and the target wavelength light corresponding to the light interference phenomenon with the target membrane is found from the preset table, so that the light source emitting the target wavelength light can have light interference phenomenon with all target membranes with a thickness in the reference film thickness range and a film material type, thereby obtaining effective film thickness parameters. It is convenient to obtain the test results of the test battery based on the effective film thickness parameters in the future, and the accuracy of the test results can be further improved.

[0042] In an exemplary embodiment, the preset coating thickness is 2 mm, the film thickness manufacturing error is -0.4 to 0.4 mm, and the reference film thickness range of the test battery is 1.6 to 2.4 mm.

[0043] Optionally, a test light source matching the light source type is used to perform multi-point synchronous detection on the test cell through an optical fiber to obtain film thickness parameters of the test cell, including:

[0044] Using a test light source that matches the light source type, multiple optical fibers are used to simultaneously detect different measuring points on the surface of the test battery one by one, and multiple phase differences corresponding to different measuring points are obtained; wherein the number of the multiple optical fibers is equal to the number of different measuring points;

[0045] Based on each phase difference, the film thickness of the corresponding measuring point is obtained;

[0046] The calculation formula of the film thickness at the measuring point is as follows:

[0047] d = δλ / 2πn;

[0048] Wherein, d represents the film thickness at the measuring point, δ represents the phase difference, λ represents the wavelength of the target wavelength light emitted by the test light source, and n represents the refractive index corresponding to the film material of the test light source.

[0049] The film thickness parameters of the test cell are formed based on the film thickness at multiple measuring points.

[0050] In this embodiment, different measuring points are evenly distributed on the surface of the test battery, and during detection, the optical fiber irradiates the measuring point vertically through the probe, so that the target wavelength light emitted by the test light source matching the light source type is vertically incident on the measuring point film at the measuring point. In this embodiment, a test light source matching the light source type is used to detect different measuring points evenly distributed on the surface of the test battery one by one through multiple optical fibers at the same time, and the film thickness parameters of each position on the surface of the test battery can be detected at the same time. The film thickness parameters show the relatively comprehensive overall film thickness of the test battery. It is convenient to consider the film thickness parameters when determining the test results later, that is, consider the relatively comprehensive overall film thickness of the test battery, so that the accuracy of the test results is higher. At the same time, this embodiment can obtain the film thickness parameters of different measuring points on the surface of the test battery at the same time, avoiding the film thickness error caused by changes in the test environment due to external interference when performing single-point detection on different measuring points on the surface of the test battery at different times, thereby improving the accuracy of the test results.

[0051] Optionally, the film thickness parameter includes film thickness at multiple measuring points; and obtaining a test result of the test battery based on the film thickness parameter includes:

[0052] Obtaining manufacturing parameters when manufacturing a test battery, the manufacturing parameters including a preset coating thickness and a qualified tolerance of the coating thickness;

[0053] Based on the preset coating thickness and the qualified film thickness error, the qualified film thickness range of the test battery is obtained;

[0054] When the film thicknesses at the multiple measuring points are all within the qualified film thickness range, the test result of the test battery is determined to be qualified, otherwise, the test result of the test battery is determined to be unqualified.

[0055] In this embodiment, the qualified film thickness range of the test battery is obtained by the manufacturing parameters when manufacturing the test battery, and it is possible to intuitively judge whether the film thicknesses at multiple measuring points are within the qualified film thickness range, that is, when the film thicknesses at multiple measuring points are all within the qualified film thickness range, the test result of the test battery is determined to be qualified, otherwise, the test result of the test battery is determined to be unqualified. In this way, by intuitively comparing and judging the film thicknesses at multiple measuring points with the qualified film thickness range, there is no need for complex judgment conditions, and the efficiency of obtaining the test results of the test battery can be improved.

[0056] In an exemplary embodiment, the preset coating thickness is 2 mm, the qualified error of the film thickness is between -0.2 and 0.2 mm, and the qualified film thickness range is between 1.8 mm and 2.2 mm.

[0057] See also Figure 2 , Figure 2 In an exemplary embodiment of the present application, a battery testing device using an optical fiber-based battery testing method is provided. Figure 2As shown, the present application provides a battery testing device, which applies the above-mentioned optical fiber-based battery testing method; the device includes:

[0058] A test light source, an optical fiber and a detection module, wherein the optical fiber includes a light source end, a first branch end and a second branch end; the test light source is connected to the light source end, the first branch end is connected to the detection module, and the second branch end is connected to a probe;

[0059] When testing the test battery, the test light source is controlled to emit light, and the probe and detection module are used to perform multi-point synchronous detection on the test battery through optical fiber to obtain the film thickness parameters of the test battery, so as to obtain the test result of the test battery based on the film thickness parameters.

[0060] A battery testing device is provided in this embodiment. A test light source is connected to the light source end of an optical fiber, a first branch end of the optical fiber is connected to a detection module, and a probe is connected to the second branch end of the optical fiber. When testing the test battery, the test light source is controlled to emit light, and the emitted light is sent to the probe through the light source end and the second branch end of the optical fiber, and the probe is controlled to irradiate the received light vertically to the surface of the test battery. The film on the surface of the test battery will interfere with the incident light and reflect (or transmit) to achieve multi-point synchronous detection. A phase difference will be generated between the light reflected back (or transmitted) multiple times, and then the probe is controlled to receive the detected phase difference, and the phase difference is sent to the detection module through the second branch end and the first branch end. In the detection module, the test battery is analyzed and calculated to obtain the film thickness parameters of the test battery, so as to obtain the test results of the test battery based on the film thickness parameters. In this way, by performing multi-point synchronous detection on the test battery, the film thickness parameters of each position on the surface of the test battery can be detected at the same time, and the film thickness parameters show a relatively comprehensive overall film thickness of the test battery. In order to consider the film thickness parameter when determining the test results, that is, to consider the relatively comprehensive overall film thickness of the test battery, so that the accuracy of the test results is higher. At the same time, the present application detects the film thickness parameters of each position on the surface of the test battery at the same time, avoiding the film thickness error caused by the test environment being susceptible to external interference when performing single-point detection on each position on the surface of the test battery at different times, thereby further improving the accuracy of the test results. Among them, the optical fiber is Y-shaped and consists of two branches. One end of the merged end is connected to the probe as the second branch end, and one of the other two ends is connected to the test light source as the light source end, and the other end is connected to the detection module as the first branch end.

[0061] In this embodiment, the test light source is connected to the light source end of the optical fiber through a multi-channel optical fiber. The multi-channel optical fiber is an optical fiber with one channel divided into multiple channels. The multi-channel optical fiber includes a main line and multiple branch lines. The branch lines are single-core optical fibers, and the number of inner cores of the main line is equal to the number of multiple branch lines. Among them, the test light source is connected to one end of the main line of the multi-channel optical fiber, and the other end of the main line is coupled with one end of the multiple branch lines through an optical fiber coupler for single-core corresponding coupling, so that the optical signal generated by the test light source is transmitted to the multiple branch lines through the main line, and the branch lines do not interfere with each other. The light source separated from each branch line is an independent full-spectrum light source. At the same time, the other end of each branch line is connected to the light source end of a Y-type optical fiber, so as to realize multi-point detection. In this embodiment, the number of multiple branch lines of the multi-channel optical fiber is equal to the number of Y-type optical fibers.

[0062] Take a one-to-five multi-channel optical fiber as an example. Figure 3 As shown, the one-to-five multi-channel optical fiber includes a trunk line and five branch lines, the trunk line is a five-core optical fiber, the branch lines are single-core optical fibers, and the trunk line is connected to the five branch lines through optical fiber couplers. In addition, the multi-channel optical fiber and Y-type optical fiber of the present application are also suitable for connecting components of an ellipsometer thickness measuring device. An ellipsometer thickness measuring device is a testing device that obtains optical constants and structural information of a material by changing the polarization state of light before and after reflection on the surface of a medium.

[0063] Compared with the prior art method of testing different measuring points on the surface of the test battery, that is, using one test light source for installation and multi-channel detection at one measuring point, and because the light emitted by different photometric light sources is different, each test light source needs to be debugged to achieve the same light source conditions at different measuring points, which makes the debugging time longer, and the large number of test light sources required makes the testing cost high. The installation method of this embodiment through the connection of multiple optical fibers and multiple Y-type optical fibers is simple to install, and there is no need to debug the light source. Only one test light source is needed to perform multi-channel detection of different measuring points on the surface of the test battery under the same light source conditions, which reduces the testing cost.

[0064] Optionally, the probe is an integrating sphere, a direct-incidence probe, or a multi-angle-incidence probe.

[0065] In this embodiment, the corresponding probe is selected based on the test battery. In general, a direct-beam probe is often used to save space and cost. The integrating sphere is suitable for batteries with poor surface flatness, and can even the light reflected from the battery surface to reduce the interference of scattered optical fibers, so as to improve the accuracy of the obtained film thickness parameters. Multi-angle incident probes are usually suitable for observing the polarized light P light and S light in the light reflected from the battery surface, which can obtain more thin film optical information, thereby improving the accuracy of the obtained film thickness parameters.

[0066] See also Figure 4 , Figure 4 This is a functional module corresponding to the battery testing device in an exemplary embodiment of the present application. Figure 4 As shown, the functional modules corresponding to the battery test device include an assembly line, a battery cell, a light source module, an optical fiber, a probe, a detection module, an industrial computer and a display. Among them, the battery cell is located on the assembly line, the light source module is provided with a test light source, and the detection module is a spectrum detection module, including a receiving end and a signal transmission end.

[0067] The test light source of the light source module and the receiving end of the detection module are connected to the probe through a Y-shaped optical fiber, the signal transmission end of the detection module is connected to the industrial computer through a USB line, and the industrial computer is connected to the display. The industrial computer can be used as the terminal device of this application.

[0068] Before the test of the present application begins, first, based on the fact that the light intensity perceived by the CCD of the probe is proportional to the integration time, the integration time is adjusted through the CCD interface of the test software interface displayed on the monitor, so that the time and light intensity of the target wavelength light emitted by the test light source transmitted to different probes are the same, so as to ensure the consistency of the test environment at each measuring point. Then, based on the test battery, the type of light source used for the test is determined, and an LED light source, a halogen light source, or a xenon light source, etc. are selected. Based on the interface type of the multi-channel optical fiber and the Y-type optical fiber in the battery testing device, a suitable adapter is selected for connection. The probe in the battery testing device selects an integrating sphere, a direct probe, or a multi-angle incident probe, etc. according to the type of test battery or the test environment. When the test starts, TCP / IP or IO communication is used between the components in the battery testing device to realize the automated online test of the test device to apply a fiber-based battery testing method of the present application to perform multi-point synchronous detection on the test battery to obtain the test result of the test battery. When the test result is unqualified, the test battery is displayed as NG (No Good) on the test software interface of the display, and then the robot is controlled to grab the NG test battery on the assembly line to screen out the unqualified test batteries on the assembly line. Among them, TCP / IP is generally the communication protocol selected by automation manufacturers. The IO internal proximity switch is directly triggered without the need for automation assistance.

[0069] See also Figure 5 , Figure 5 An optical fiber-based battery testing system is shown as an exemplary embodiment of the present application. Figure 5 As shown, the present application provides a fiber-optic based battery testing system, comprising:

[0070] a determination module for determining a type of light source for testing based on a test battery;

[0071] A detection module is used to use a test light source that matches the light source type to perform multi-point synchronous detection on the test battery through optical fibers to obtain film thickness parameters of the test battery;

[0072] The module is used to obtain the test result of the test battery based on the film thickness parameter.

[0073] The present embodiment provides a fiber-based battery testing system, which determines the light source type corresponding to the test battery, and uses a test light source that matches the light source type in the detection module to perform multi-point synchronous detection on the test battery through the optical fiber to obtain the film thickness parameters of the test battery, and obtains the test result of the test battery based on the film thickness parameters in the module. In this way, by performing multi-point synchronous detection on the test battery, the film thickness parameters of each position on the surface of the test battery can be detected and obtained at the same time, and the film thickness parameters show the relatively comprehensive overall film thickness of the test battery. And when determining the test results, the film thickness parameters are taken into account, that is, the relatively comprehensive overall film thickness of the test battery is taken into account, so that the accuracy of the test results is higher. At the same time, the present embodiment detects and obtains the film thickness parameters of each position on the surface of the test battery at the same time, avoiding the film thickness error caused by the change of the test environment due to the susceptibility of the test environment to external interference when performing single-point detection on each position on the surface of the test battery at different times, thereby further improving the accuracy of the test results.

[0074] Optionally, a module is determined, specifically for:

[0075] Obtaining manufacturing parameters when manufacturing the test battery;

[0076] Obtaining target wavelength light based on manufacturing parameters;

[0077] The type of a light source that emits light of a target wavelength is obtained and used as the type of light source for testing.

[0078] Optionally, the manufacturing parameters include a preset coating thickness, a film material type, and a film thickness manufacturing error;

[0079] Identify modules, specifically for:

[0080] Based on the preset coating thickness and the film thickness manufacturing error, the reference film thickness range of the test battery is obtained;

[0081] A battery membrane with a thickness within a reference film thickness range and a type of membrane material is used as a target membrane;

[0082] Find the target wavelength light corresponding to the light interference phenomenon with the target film from the preset table.

[0083] Optionally, the detection module is specifically used to:

[0084] Using a test light source that matches the light source type, multiple optical fibers are used to simultaneously detect different measuring points on the surface of the test battery one by one, and multiple phase differences corresponding to different measuring points are obtained; wherein the number of the multiple optical fibers is equal to the number of different measuring points;

[0085] Based on each phase difference, the film thickness of the corresponding measuring point is obtained;

[0086] The film thickness parameters of the test cell are formed based on the film thickness at multiple measuring points.

[0087] Optionally, the film thickness parameter includes film thickness at multiple measuring points; the obtaining module is specifically used for:

[0088] Obtaining manufacturing parameters when manufacturing a test battery, the manufacturing parameters including a preset coating thickness and a qualified tolerance of the coating thickness;

[0089] Based on the preset coating thickness and the qualified film thickness error, the qualified film thickness range of the test battery is obtained;

[0090] When the film thicknesses at the multiple measuring points are all within the qualified film thickness range, the test result of the test battery is determined to be qualified, otherwise, the test result of the test battery is determined to be unqualified.

[0091] It should be noted that the optical fiber-based battery testing system provided in the above embodiment and the optical fiber-based battery testing method provided in the above embodiment belong to the same concept, wherein the specific manner in which each module and unit performs the operation has been described in detail in the method embodiment and will not be repeated here. In actual application, the optical fiber-based battery testing system provided in the above embodiment can distribute the above functions to different functional modules as needed, that is, divide the internal structure of the system into different functional modules to complete all or part of the functions described above, and this is not limited here.

[0092] A computing device according to an embodiment of the present application includes a memory, a processor, and a program stored in the memory and running on the processor. When the processor executes the program, part or all of the steps of the above-mentioned optical fiber-based battery testing method are implemented.

[0093] Among them, the computing device can be a computer, and correspondingly, its program is computer software. The above-mentioned parameters and steps in a computing device of the present application can refer to the parameters and steps in the embodiment of an optical fiber-based battery testing method above, and will not be repeated here.

[0094] In an embodiment of the present application, a computer-readable storage medium is provided, in which instructions are stored. When the instructions are executed, the steps of the above-mentioned optical fiber-based battery testing method are executed.

[0095] The computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0096] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method of the embodiment of the present disclosure. The aforementioned computer-readable storage medium may be a non-transitory computer-readable storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a disk or an optical disk, and other media that can store program codes, or a transient computer-readable storage medium.

[0097] The flowchart and block diagram in the accompanying drawings illustrate the possible architecture, functions and operations of the system, method and computer program product according to various embodiments of the present application. Wherein, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession 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 block diagram or flowchart, and the combination of boxes in the block diagram or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0098] Those skilled in the art know that the present application can be implemented as a system, method or computer program product. Therefore, the present disclosure can be specifically implemented in the following forms, namely: it can be complete hardware, it can be complete software (including firmware, resident software, microcode, etc.), or it can be a combination of hardware and software, generally referred to as "module" or "system" herein. In addition, in some embodiments, the present application can also be implemented in the form of a computer program product in one or more computer-readable media, and the computer-readable medium contains computer-readable program code. Computer-readable storage media can be, for example, but not limited to - electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or devices, or any combination of the above.

[0099] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0100] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A battery testing method based on optical fiber, characterized in that: include: determining the type of light source to use for testing based on the test battery; Using a test light source that matches the light source type, perform multi-point synchronous detection on the test battery through optical fibers to obtain film thickness parameters of the test battery; A test result of the test battery is obtained based on the film thickness parameter.

2. The method according to claim 1, characterized in that The step of determining the type of light source to be used for testing based on the test battery comprises: Obtaining manufacturing parameters when manufacturing the test battery; Obtaining target wavelength light based on the manufacturing parameters; The type of a light source that emits the target wavelength light is obtained, and the type is used as the light source type for testing.

3. The method according to claim 2, characterized in that The manufacturing parameters include preset coating thickness, film material type and film thickness manufacturing error; The step of obtaining the target wavelength light based on the manufacturing parameters comprises: Based on the preset coating thickness and the film thickness manufacturing error, a reference film thickness range of the test battery is obtained; Taking a battery membrane having a thickness within the reference film thickness range and of the type of the film material as a target membrane; The target wavelength light corresponding to the light interference phenomenon with the target film is found from the preset table.

4. The method according to claim 1, characterized in that: The method of using a test light source matching the light source type to perform multi-point synchronous detection on the test battery through an optical fiber to obtain the film thickness parameters of the test battery includes: Using a test light source that matches the light source type, the different measuring points on the surface of the test battery are detected one by one through multiple optical fibers at the same time to obtain multiple phase differences corresponding to the different measuring points; wherein the number of the multiple optical fibers is equal to the number of the different measuring points; Obtaining the film thickness at the corresponding measuring point based on each phase difference; The film thickness parameter of the test cell is formed based on the film thicknesses at the plurality of measurement points.

5. The method according to any one of claims 1 to 4, characterized in that: The film thickness parameter includes film thickness at multiple measuring points; and obtaining the test result of the test battery based on the film thickness parameter includes: Acquire manufacturing parameters when manufacturing a test battery, wherein the manufacturing parameters include a preset coating thickness and a qualified tolerance of the coating thickness; Based on the preset coating thickness and the qualified film thickness error, obtaining the qualified film thickness range of the test battery; When the film thicknesses at the plurality of measuring points are all within the qualified film thickness range, the test result of the test battery is determined to be qualified; otherwise, the test result of the test battery is determined to be unqualified.

6. A battery testing device, characterized in that: A fiber-based battery testing method according to any one of claims 1 to 5 is applied; the device comprises a test light source, an optical fiber and a detection module, the optical fiber comprises a light source end, a first branch end and a second branch end; the test light source is connected to the light source end, the first branch end is connected to the detection module, and the second branch end is connected to a probe; When testing a test battery, the test light source is controlled to emit light, and the probe and the detection module are used to perform multi-point synchronous detection on the test battery through the optical fiber to obtain the film thickness parameters of the test battery, so as to obtain the test result of the test battery based on the film thickness parameters.

7. The device according to claim 6, characterized in that The probe is an integrating sphere, a direct-incidence probe or a multi-angle-incidence probe.

8. An optical fiber-based battery testing system, characterized in that: include: a determination module for determining a type of light source for testing based on a test battery; A detection module, used to use a test light source matching the light source type to perform multi-point synchronous detection on the test battery through optical fibers to obtain film thickness parameters of the test battery; An obtaining module is used to obtain the test result of the test battery based on the film thickness parameter.

9. A computing device comprising a memory, a processor, and a program stored in the memory and running on the processor, characterized in that: When the processor executes the program, the steps of the optical fiber-based battery testing method according to any one of claims 1 to 5 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed on a terminal device, the terminal device executes the steps of the optical fiber-based battery testing method according to any one of claims 1 to 5.

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