Battery or battery nipple fault detection method, device, equipment, medium and application

Abstract

The invention relates to a battery or battery pup joint fault detection method and device, computer equipment, a medium and application, and the battery or battery pup joint fault detection method comprises the following steps: obtaining the propagation time and signal amplitude of an ultrasonic pulse wave transmitted through the interior of a battery; and according to the propagation time and the signal amplitude of the ultrasonic pulse wave, comparing the preset propagation time with the preset signal amplitude, and judging whether the battery fails or not. According to the battery fault detection method, whether the battery fails or not is judged through the propagation time and the signal amplitude of the ultrasonic pulse waves in the battery in combination with an ultrasonic non-destructive detection technology, the detection process and the analysis process are simple, convenient and rapid, internal defects and potential hazards of the battery can be pre-judged and detected, and the detection efficiency is improved. In addition, the battery in use can be detected, and the practical economic practice value is achieved. The device is especially suitable for the technical field of oil exploration and development, and is especially suitable for detecting a high-temperature lithium battery short section used by a measurement-while-drilling instrument in the technical field of measurement-while-drilling instrument detection.

Description

Technical Field

[0001] The present application relates to the field of measurement while drilling and battery detection technology, and in particular to a method, device, computer equipment, medium and application for detecting battery or battery short section faults. Background Art

[0002] The high-temperature lithium battery short section is composed of a high-temperature lithium battery pack, a connector, a vibration-damping rubber ring, and a pressure-resistant cylinder. The high-temperature lithium battery pack is generally composed of 8 to 10 3.67V high-temperature lithium batteries connected in series. High-temperature lithium batteries are a general term for a series of chemical power sources with lithium alloy as the negative electrode. Non-rechargeable types are usually used in high-temperature environments underground. The interior of a high-temperature lithium battery is a relatively complex layered structure, which is formed by the alternating superposition of positive electrode plates, ultra-fine glass fiber diaphragms, and negative electrode plates, and the gaps between each layer are filled with electrolyte. Non-rechargeable high-temperature lithium batteries have the advantages of high single cell voltage, high specific energy, stable discharge voltage, long storage life, and wide operating temperature range. However, if high-temperature lithium batteries are used improperly, they will cause huge safety hazards and even cause explosions. The main cause of the explosion is a short circuit in the battery. When an external short circuit occurs, high heat is generated inside the battery core, causing the electrolyte to gasify, and the gas pressure gradually breaks the battery shell; when an internal short circuit occurs, it is caused by the crystallization of lithium atoms penetrating the diaphragm. The continuous development of the short circuit generates a large amount of heat, causing the electrolyte to decompose and produce gas, which breaks the battery shell. In the above two situations, once the battery shell is damaged, air or water will enter the battery and react violently with the metal lithium, causing an explosion. In the field of oil exploration and development technology, especially in the field of drilling measurement instrument detection technology, for drilling measurement instruments, high temperature, vibration and impact are important factors threatening the safety of high-temperature lithium batteries, which can easily cause battery short circuits. Therefore, during on-site use and routine maintenance, it is absolutely forbidden for aqueous solutions to come into contact with batteries to avoid discharge, explosion of high-temperature lithium batteries and other dangerous situations.

[0003] At present, the working status detection of high-temperature lithium battery short sections mainly relies on the external characteristics such as internal resistance, voltage, and current of high-temperature lithium batteries. By collecting the current, voltage and other parameters output by the high-temperature lithium battery pack and comparing and analyzing them with their thresholds, the charge state of the high-temperature battery short section is evaluated and the remaining working time of the high-temperature battery short section is estimated, so as to prepare for the replacement of the high-temperature lithium battery pack. However, this detection method cannot directly obtain the charge state of the high-temperature battery short section through measurement, and is affected by complex working conditions such as downhole temperature, vibration, and impact. Moreover, the internal defects and potential hazards of the high-temperature lithium battery short section cannot be predicted. In addition, during the drilling process, the number of high-temperature lithium battery packs consumed is huge, and the high-temperature lithium battery packs are often replaced during the drilling process. These replaced high-temperature lithium battery packs are often directly discarded without being tested and reused, resulting in a huge waste of high-temperature lithium batteries.

[0004] Chinese patent CN113189208A discloses a method and system for ultrasonic feature detection of lithium batteries, including the following steps: S10. Drive the lithium battery to move in the X, Y and Z directions, output pulsed laser to stimulate laser ultrasound to detect the lithium battery; S20. The air-coupled ultrasonic probe obtains the time domain transmission signal inside the lithium battery and transmits the time domain transmission signal to the signal automatic recognition system, and the signal automatic recognition system analyzes and extracts the defect signal characteristics inside the lithium battery; S30. Based on the coordinate information of the mobile platform in step S10 and the defect signal characteristics obtained in step S20, the visualization imaging system constructs a three-dimensional ultrasonic detection visualization image. The present invention uses laser high-frequency ultrasound with short wavelength and strong penetration to lithium batteries, and can detect the entire area of ​​lithium batteries with high resolution and high detection accuracy; the internal defects are visualized through a three-dimensional map, and the detection results can be displayed intuitively. However, the above-mentioned ultrasonic detection method for lithium batteries is complicated in subsequent data analysis and is not suitable for battery detection during battery use, especially for the detection of short sections of high-temperature lithium batteries. Summary of the invention

[0005] Based on this, it is necessary to provide a battery fault detection method, device, computer equipment, medium and application that can predict and detect internal defects and potential hazards of batteries, has a relatively simple detection method and can detect batteries in use, and has real economic practical value.

[0006] In a first aspect, the present application provides a method for detecting a battery or a short battery section fault, comprising the following steps:

[0007] Obtaining the propagation time and signal amplitude of the ultrasonic pulse wave after passing through the battery or battery short section;

[0008] According to the propagation time and signal amplitude of the ultrasonic pulse wave, the preset propagation time and preset signal amplitude are compared to determine whether the battery or the battery short section is faulty.

[0009] In one embodiment, the step of comparing the propagation time and the signal amplitude of the ultrasonic pulse wave with the preset propagation time and the preset signal amplitude to determine whether the battery or the battery section is faulty includes:

[0010] When the propagation time is greater than a first preset range of a preset propagation time, or when the signal amplitude is less than a second preset range of a preset signal amplitude, it is determined that the battery or the battery section has a fault.

[0011] In one embodiment, the step of comparing the propagation time and the signal amplitude of the ultrasonic pulse wave with the preset propagation time and the preset signal amplitude to determine whether the battery or the battery section is faulty further includes:

[0012] When the propagation time is less than the first preset range of the preset propagation time, and the signal amplitude is less than the third preset range of the preset signal amplitude, it is determined that the battery or battery short section is in a full state of charge;

[0013] When the propagation time is less than the first preset range of the preset propagation time, and the signal amplitude is less than the fourth preset range of the preset signal amplitude, the battery or battery short section is determined to be in a transient state of charge, wherein the second preset range>the fourth preset range>the third preset range.

[0014] In one of the embodiments, the first preset range is greater than 10 μs; and / or, the second preset range is greater than 70%; and / or, the third preset range is 0-30%; and / or, the fourth preset range is 30%-70%.

[0015] In one of the embodiments, before the step of obtaining the propagation time and signal amplitude of the ultrasonic pulse wave after passing through the battery or the battery sub, the battery or battery sub fault detection method further includes the following steps: sending a first instruction for controlling the emission of the ultrasonic pulse wave that passes through the battery or the battery sub;

[0016] In one embodiment, the step of obtaining the propagation time and signal amplitude of the ultrasonic pulse wave after passing through the battery or the battery sub includes: obtaining the received ultrasonic pulse wave signal data after passing through the battery or the battery sub;

[0017] The ultrasonic pulse wave signal data is amplified, filtered, and digitally sampled to determine the propagation time and signal amplitude of the ultrasonic pulse wave after passing through the battery or the battery short section.

[0018] In a second aspect, the present application provides a battery or battery short section fault detection device, comprising:

[0019] An acquisition module, used to acquire the propagation time and signal amplitude of the ultrasonic pulse wave after passing through the battery or the battery short section;

[0020] The judgment module is used to judge whether the battery or the battery short section is faulty according to the propagation time and signal amplitude of the ultrasonic pulse wave, compared with the preset propagation time and the preset signal amplitude.

[0021] In a third aspect, the present application provides a fault detection device, comprising:

[0022] A clamping bracket, wherein the clamping bracket is provided with a detection position for clamping a battery or a battery short section;

[0023] An ultrasonic transmitting probe is arranged on one side of the clamping bracket at the detection position;

[0024] An ultrasonic receiving probe is arranged on the other side of the clamping bracket at the detection position;

[0025] A system controller, electrically connected to the ultrasonic transmitting probe and the ultrasonic receiving probe respectively;

[0026] In one embodiment, the system controller is used to perform the steps of the battery or battery short section fault detection method as described in any of the above embodiments;

[0027] In one of the embodiments, the ultrasonic transmitting probe is aligned with the ultrasonic receiving probe during the battery or battery section detection process;

[0028] In one embodiment, the ultrasonic transmitting probe is slidably disposed on one side of the clamping bracket at the detection position, and the ultrasonic receiving probe is slidably disposed on the other side of the clamping bracket at the detection position;

[0029] In one embodiment, the clamping bracket clamps two ends of the battery or the battery nipple through two pre-tightening cone sleeves, and the two pre-tightening cone sleeves together form a detection position for clamping the battery or the battery nipple;

[0030] In one of the embodiments, the fault diagnosis device further comprises a high-power pulse generator, the high-power pulse generator is electrically connected to the system controller, and the high-power pulse generator is coupled to the ultrasonic transmitting probe;

[0031] In one embodiment, the fault diagnosis device also includes a programmable gain preamplifier, a waveform acquisition processing and monitor, and a fault analysis and diagnosis module, the programmable gain preamplifier is electrically connected to the system controller and the ultrasonic receiving probe, the waveform acquisition processing and monitor is electrically connected to the system controller and the programmable gain preamplifier, and the fault analysis and diagnosis module is electrically connected to the system controller and the waveform acquisition processing and monitor.

[0032] In a fourth aspect, the present application provides a method for diagnosing a battery or battery short section fault using a fault diagnosis device, wherein the battery or battery short section fault diagnosis device is a battery or battery short section fault diagnosis device as described in any of the above embodiments, and the diagnostic method comprises the following steps:

[0033] Clamping the battery or battery section at the detection position of the clamping bracket;

[0034] Place the ultrasonic transmitting probe and the ultrasonic receiving probe on opposite sides of the battery or the battery short section through the coupling agent, and align the ultrasonic transmitting probe and the ultrasonic receiving probe with their central axes overlapping;

[0035] Sending a first instruction for controlling the emission of ultrasonic pulse waves that transmit the battery or the battery subsection through the system controller;

[0036] The ultrasonic transmitting probe transmits ultrasonic pulse waves into the battery or the battery short section under the control of the first instruction;

[0037] The ultrasonic receiving probe receives the ultrasonic pulse wave after passing through the battery or the battery short section under the control of the system controller;

[0038] The system controller is used to determine the propagation time and signal amplitude according to the received ultrasonic pulse wave, and compare the propagation time and signal amplitude of the ultrasonic pulse wave with the preset propagation time and the preset signal amplitude to determine whether the battery or the battery short section is faulty;

[0039] In one of the embodiments, after the ultrasonic receiving probe receives the ultrasonic pulse wave, the system controller controls the high-power pulse generator to amplify and filter the received ultrasonic pulse wave, and the system controller controls the waveform acquisition processor and monitor to digitally sample the ultrasonic wave after amplification and filtering and determine the propagation time and signal amplitude; the system controller controls the fault detection device to compare the propagation time and signal amplitude of the ultrasonic pulse wave with the preset propagation time and the preset signal amplitude to determine whether the battery or the battery short section is faulty.

[0040] In a fifth aspect, the present application also provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the battery or battery short section fault detection method as described in any of the above embodiments are implemented.

[0041] In a sixth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the battery or battery short section fault detection method as described in any of the above embodiments are implemented.

[0042] The above-mentioned battery or battery short section fault detection method, by combining ultrasonic non-destructive testing technology, determines whether the battery is faulty by the propagation time and signal amplitude of the ultrasonic pulse wave inside the battery. The detection process and analysis process are simple, convenient and fast, and can predict and detect the internal defects and potential hazards of the battery, and can detect the battery in use, which has practical economic and practical value. Moreover, the battery fault detection method of the present application is particularly suitable for the technical field of oil exploration and development, especially for the detection of high-temperature lithium battery short sections used in drilling measurement instruments in the technical field of drilling measurement instrument detection. The battery fault and state can be judged by ultrasonic detection, and then the charge state of the high-temperature battery short section can be predicted, and the high-temperature lithium battery with internal defects and potential hazards can be identified in advance. Moreover, for unused batteries, the power usage status can also be identified by ultrasonic detection, reducing the waste caused by direct disposal when the power is not used up. It should be noted that the battery or battery short section fault detection method, device, and diagnostic method of the present application, when the object is a battery, the process object is the battery, and when the object is a battery short section, the process object is the battery short section. For the sake of simplicity, the battery and the battery short section will not be repeated at the same time. It should be understood that the battery parts in the subsequent embodiments can be directly replaced by the battery short section, which can be used as a parallel technical solution. In other words, in this application, the battery short section can be detected or diagnosed, and the battery can also be detected or diagnosed separately.

[0043] The present application proposes a fault detection device and diagnostic method for a high-temperature lithium battery short section by combining ultrasonic nondestructive testing technology with the change of the physical state inside the lithium battery during the discharge process. The purpose of the present invention is to overcome the defects of the prior art, provide a fault detection device and diagnostic method for a high-temperature lithium battery short section, accurately and reliably monitor and evaluate the charge state, internal defects and potential hazards of the high-temperature lithium battery short section, and provide a safe, efficient and stable high-temperature lithium battery short section for downhole measurement while drilling, which can not only ensure that the measurement while drilling instrument can work continuously and reliably for a long time during a drilling process, but also avoid the ineffective consumption and waste of the limited capacity of the high-temperature battery short section. The fault detection device for the high-temperature lithium battery short section provided by the present invention has no requirements on whether the high-temperature lithium battery short section is discharging. As long as the high-temperature lithium battery short section is discharged from the well after being drilled out of the well and discharged on the ground, fault detection can be performed. There is no need to power off the high-temperature lithium battery short section, which eliminates the opportunity for the aqueous solution to contact the battery during on-site maintenance, and completely avoids the occurrence of discharge short circuits, which causes the high-temperature lithium battery to burst and other dangerous situations. The fault detection device for the high-temperature lithium battery short section provided by the present invention has the advantages of safety, reliability and efficiency. The fault diagnosis method for a high-temperature lithium battery pup provided by the present invention takes into account the presence of air inside the high-temperature lithium battery pup, as well as the presence of solid, liquid or colloidal electrolytes and possible gases in the high-temperature battery pack, and adopts a one-shot-one-receive transmission method to perform transmission detection on the high-temperature lithium battery pup with ultrasonic longitudinal waves, which has the advantages of simple detection principle, easy identification and analysis of waveform signals, and rapid and intuitive diagnosis results. In view of the shortcomings of the prior art in lacking means for detecting the state of charge and internal defects of high-temperature lithium battery pups, the present invention provides a fault detection device and diagnosis method for a high-temperature lithium battery pup, which is applied to the maintenance of high-temperature lithium battery pups in drilling measurement instruments, and has significant advantages in terms of safety, reliability, efficiency, simplicity of detection principle, easy identification and analysis of waveform signals, and rapid and intuitive diagnosis results, thereby improving the utilization efficiency of the limited capacity of high-temperature lithium battery pups. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A step diagram of a battery failure detection method according to an embodiment;

[0045] Figure 2 A module structure diagram of a battery fault detection device according to an embodiment;

[0046] Figure 3 A schematic diagram of the structure of a cross section of a battery fault detection device according to an embodiment;

[0047] Figure 4 is a schematic structural diagram of another cross section of a battery fault detection device according to an embodiment;

[0048] Figure 5 FIG. 1 is a schematic diagram of the structure of a computer device in an embodiment. DETAILED DESCRIPTION

[0049] In order to facilitate the understanding of the present application, in order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application, and the preferred implementation methods of the present application are given in the accompanying drawings. However, the present application can be implemented in many different forms and is not limited to the implementation methods described herein. On the contrary, the purpose of providing these implementation methods is to make the disclosure of the present application more thoroughly and comprehensively understood. The present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited to the specific embodiments disclosed below. In addition, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. When an element is considered to be "connected" to another element, it may be directly connected to another element or there may be a centering element at the same time. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present application. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0050] In a first aspect, the present application provides a battery failure detection method. In one embodiment, refer to Figure 1 , the battery failure detection method comprises the following steps:

[0051] S110: Acquire the propagation time and signal amplitude of the ultrasonic pulse wave after passing through the battery;

[0052] In this embodiment, the ultrasonic pulse wave can be transmitted to the battery, and then the ultrasonic pulse wave passing through the battery to be tested can be received, and the propagation time of the ultrasonic pulse wave after passing through the battery can be obtained by recording the transmission time and the reception time. The signal amplitude of the ultrasonic pulse wave after passing through the battery can be obtained by analyzing the obtained ultrasonic pulse wave. For example, the ultrasonic pulse wave is ultrasonic wave.

[0053] In this embodiment, the battery includes but is not limited to lithium batteries and the like. For example, the battery is a high-temperature lithium battery section, that is, a high-temperature lithium battery section used in the measurement while drilling technology field, especially in the measurement while drilling technology field. Specifically, the high-temperature lithium battery section includes a high-temperature lithium battery pack, a connector, a vibration-damping rubber ring and a pressure-resistant cylinder. The high-temperature lithium battery pack is located in the pressure-resistant cylinder. Two end portions of the high-temperature battery pack are respectively connected to two end caps, and vibration-damping rubber rings are installed on the end caps. Contacts are respectively connected to the two end caps of the high-temperature lithium battery pack. Of course, it should be noted that the battery of the present application is not limited to the above-mentioned specific lithium batteries, but may also be other batteries. It may also be a primary battery or a secondary battery.

[0054] It should be noted that, when it is a battery short section fault detection method, the subsequent step is to obtain the propagation time and signal amplitude of the ultrasonic pulse wave after passing through the inside of the battery short section.

[0055] S120: Determine whether the battery is faulty by comparing the propagation time and the signal amplitude of the ultrasonic pulse wave with the preset propagation time and the preset signal amplitude.

[0056] In this embodiment, the preset propagation time and the preset signal auxiliary amplitude can be obtained through normal battery training, or in other words, can be obtained by testing a normal battery through an ultrasonic pulse wave, such as by measuring a fully charged battery, testing 90%, 80%, 70%, ..., 10%, 0% batteries respectively, and then obtaining the preset propagation time and preset signal amplitude of the ultrasonic pulse wave that penetrates the normal battery. Then, an ultrasonic test is performed on the faulty battery to obtain the boundary of the preset propagation time and preset signal amplitude of the normal battery.

[0057] In this embodiment, the propagation time and signal amplitude of the ultrasonic pulse wave are compared with the preset propagation time and signal amplitude of a normal battery, thereby facilitating the determination of whether the battery is faulty.

[0058] The above-mentioned battery fault detection method, by combining ultrasonic non-destructive testing technology, determines whether the battery is faulty by the propagation time and signal amplitude of the ultrasonic pulse wave inside the battery. The detection process and analysis process are simple, convenient and fast, and can predict and detect the internal defects and potential hazards of the battery, and can detect the battery in use, which has practical economic and practical value. Moreover, the battery fault detection method of the present application is particularly suitable for the technical field of oil exploration and development, especially for the detection of high-temperature lithium battery short sections used in drilling measurement instruments in the technical field of drilling measurement instrument detection. It can judge the battery fault and status through ultrasonic detection, and then facilitate the prediction of the charge state of the high-temperature battery short section, and identify the high-temperature lithium battery with internal defects and potential hazards in advance. Moreover, for unused batteries, the power usage status can also be identified through ultrasonic detection, reducing the waste caused by direct disposal when the power is not used up.

[0059] In one embodiment, the step of comparing the propagation time and the signal amplitude of the ultrasonic pulse wave with the preset propagation time and the preset signal amplitude to determine whether the battery is faulty includes:

[0060] When the propagation time is greater than a first preset range of the preset propagation time, or when the signal amplitude is less than a second preset range of the preset signal amplitude, it is determined that the battery has a fault.

[0061] In this embodiment, according to the propagation time and signal amplitude of the ultrasonic pulse wave passing through the battery or after being transmitted through the inside of the battery, when the propagation time is greater than a first preset range of the preset propagation time, the battery is judged to have a fault, or when the signal amplitude is less than a second preset range of the preset signal amplitude, the battery is judged to have a fault, or when the propagation time is greater than the first preset range of the preset propagation time and when the signal amplitude is less than the second preset range of the preset signal amplitude, the battery is judged to have a fault. When the battery has a fault, it needs to be replaced and no longer used.

[0062] In one embodiment, the step of comparing the propagation time and the signal amplitude of the ultrasonic pulse wave with the preset propagation time and the preset signal amplitude to determine whether the battery is faulty further includes:

[0063] When the propagation time is less than the first preset range of the preset propagation time, and the signal amplitude is less than the third preset range of the preset signal amplitude, it is determined that the battery is in a full state of charge;

[0064] When the propagation time is less than the first preset range of the preset propagation time, and the signal amplitude is less than the fourth preset range of the preset signal amplitude, the battery is deemed to be in a transient state of charge, wherein the second preset range>the fourth preset range>the third preset range.

[0065] In this embodiment, an empirical estimation of the battery state of charge is given when the battery is not faulty. This facilitates the operator to provide a reference for the evaluation of the remaining battery life. In this embodiment, when the propagation time is less than the preset propagation time in the first preset range, and the signal amplitude is less than the preset signal amplitude in the third preset range, the battery is considered to be in a full state of charge; when the propagation time is less than the preset propagation time in the first preset range, and the signal amplitude is less than the preset signal amplitude in the fourth preset range, the battery is considered to be in a transient state of charge. Preferably, when the propagation time is within the preset propagation time, and the signal amplitude is less than the preset signal amplitude in the third preset range, the battery is considered to be in a full state of charge; when the propagation time is within the preset propagation time, and the signal amplitude is less than the preset signal amplitude in the fourth preset range, the battery is considered to be in a transient state of charge. In this embodiment, the transient state of charge means that the battery life is within a few hours.

[0066] In one of the embodiments, the first preset range is greater than 10 μs; and / or, the second preset range is greater than 70%; and / or, the third preset range is 0-30%; and / or, the fourth preset range is 30%-70%.

[0067] In this embodiment, when the propagation time is much greater than the set detection time, that is, the preset propagation time, the difference between the two is more than 10μs, and the signal amplitude is much less than the set amplitude threshold, that is, the preset signal amplitude, and it drops by more than 70%, it is considered that there is a defect inside the high-temperature lithium battery short section, that is, the battery is faulty; when the propagation time is within the set detection time range, and the signal amplitude drops by 0-30% compared with the set amplitude threshold, the state of charge of the high-temperature lithium battery short section is full, and the high-temperature lithium battery short section can work normally for more than 100h continuously, that is, the state of charge is full. When the drop is greater than 30%, the state of charge of the high-temperature lithium battery short section drops rapidly, the output voltage is very small, and the remaining working time is very short, only a few hours, that is, the state of charge is short-term. In this embodiment, the above definition is adopted to facilitate the use of the high-temperature lithium battery short section during use. In particular, during the drilling process, the number of high-temperature lithium battery packs consumed is huge, and the high-temperature lithium battery packs are often replaced during the drilling process. These replaced high-temperature lithium battery packs are often directly discarded without being tested and reused, resulting in a great waste of high-temperature lithium batteries. The present application, by setting up the relatively simple and fast battery fault detection method, can quickly screen out faulty batteries on the one hand to avoid safety hazards caused by use, and on the other hand, can quickly check the charge state of some batteries without faults, so as to provide a detection reference for continued use or waste gas treatment. In particular, the battery fault detection method of the present application does not need to disassemble the high-temperature lithium battery pack, and can be detected in a charged state. The fault diagnosis method of the high-temperature lithium battery short section provided by the present invention, taking into account the presence of air inside the high-temperature lithium battery short section, and the presence of solid, liquid or colloidal electrolytes and possible gases in the high-temperature battery pack, adopts a one-transmit-one-receive transmission method to perform transmission detection of the high-temperature lithium battery short section with ultrasonic longitudinal waves, which has the advantages of simple detection principle, easy identification and analysis of waveform signals, and fast and intuitive diagnosis results. It is applied to the maintenance of high-temperature lithium battery short sections in drilling measurement instruments, and has significant advantages in terms of safety, reliability and efficiency, simple detection principle, easy identification and analysis of waveform signals, and fast and intuitive diagnosis results, thereby improving the utilization efficiency of the limited capacity of the high-temperature lithium battery short section.

[0068] In one of the embodiments, before the step of obtaining the propagation time and signal amplitude of the ultrasonic pulse wave after passing through the inside of the battery, the battery fault detection method also includes the following step: sending a first instruction for controlling the emission of the ultrasonic pulse wave that transmits the battery; in this way, by controlling the first instruction for transmitting the ultrasonic pulse wave that transmits the battery, it is convenient to control the transmitting probe to emit the ultrasonic pulse wave through the first instruction, so as to facilitate the detection of the battery.

[0069] In one embodiment, the step of obtaining the propagation time and signal amplitude of the ultrasonic pulse wave after passing through the battery includes: obtaining the received ultrasonic pulse wave signal data after passing through the battery;

[0070] The ultrasonic pulse wave signal data is amplified, filtered, and digitally sampled to determine the propagation time and signal amplitude of the ultrasonic pulse wave after passing through the interior of the battery.

[0071] In this way, the ultrasonic pulse wave signal data is amplified, filtered, and digitally sampled to facilitate the extraction of the propagation time and amplitude of the ultrasonic pulse wave train.

[0072] The above-mentioned battery fault detection method, by combining with ultrasonic non-destructive testing technology, determines whether the battery is faulty by the propagation time and signal amplitude of the ultrasonic pulse wave inside the battery. The detection process and analysis process are simple, convenient and fast, and can predict and detect the internal defects and potential hazards of the battery, and can detect the battery in use, which has practical economic and practical value. Moreover, the battery fault detection method of the present application is particularly suitable for the technical field of oil exploration and development, especially for the detection of high-temperature lithium battery short sections used in drilling measurement instruments in the technical field of drilling measurement instrument detection. It can judge the battery fault and state through ultrasonic detection, and then facilitate the pre-judgment of the charge state of the high-temperature battery short section, and identify the high-temperature lithium battery with internal defects and potential hazards in advance. Moreover, for unused batteries, the power usage status can also be identified through ultrasonic detection, reducing the waste caused by direct disposal when the power is not used up. The present application proposes a fault detection device and diagnosis method for a high-temperature lithium battery short section based on the physical state changes inside the lithium battery during the discharge process based on ultrasound, combined with ultrasonic non-destructive testing technology. The purpose of the present invention is to overcome the defects of the prior art, provide a fault detection device and diagnostic method for a high-temperature lithium battery short section, accurately and reliably monitor and evaluate the charge state, internal defects and potential hazards of the high-temperature lithium battery short section, and provide a safe, efficient and stable high-temperature lithium battery short section for downhole measurement while drilling, which can not only ensure that the measurement while drilling instrument can work continuously and reliably for a long time during a drilling process, but also avoid the ineffective consumption and waste of the limited capacity of the high-temperature battery short section. The fault detection device for the high-temperature lithium battery short section provided by the present invention has no requirements on whether the high-temperature lithium battery short section is discharging. As long as the high-temperature lithium battery short section is discharged from the well and discharged on the ground, fault detection can be performed. There is no need to power off the high-temperature lithium battery short section, which eliminates the chance of contact between the aqueous solution and the battery during on-site maintenance, and completely avoids the occurrence of discharge short circuits, which causes dangerous situations such as explosion of the high-temperature lithium battery. The fault detection device for the high-temperature lithium battery short section provided by the present invention has the advantages of safety, reliability and efficiency. The fault diagnosis method for a high-temperature lithium battery pup provided by the present invention takes into account the presence of air inside the high-temperature lithium battery pup, as well as the presence of solid, liquid or colloidal electrolytes and possible gases in the high-temperature battery pack, and adopts a one-shot-one-receive transmission method to perform transmission detection on the high-temperature lithium battery pup with ultrasonic longitudinal waves, which has the advantages of simple detection principle, easy identification and analysis of waveform signals, and rapid and intuitive diagnosis results. In view of the shortcomings of the prior art in lacking means for detecting the state of charge and internal defects of high-temperature lithium battery pups, the present invention provides a fault detection device and diagnosis method for a high-temperature lithium battery pup, which is applied to the maintenance of high-temperature lithium battery pups in drilling measurement instruments, and has significant advantages in terms of safety, reliability, efficiency, simplicity of detection principle, easy identification and analysis of waveform signals, and rapid and intuitive diagnosis results, thereby improving the utilization efficiency of the limited capacity of high-temperature lithium battery pups.

[0073] In a second aspect, the present application provides a battery failure detection device, see Figure 2 , the battery fault detection device comprises:

[0074] An acquisition module, used to acquire the propagation time and signal amplitude of the ultrasonic pulse wave after passing through the battery;

[0075] The judgment module is used to judge whether the battery is faulty according to the propagation time and signal amplitude of the ultrasonic pulse wave, compared with the preset propagation time and the preset signal amplitude.

[0076] In one embodiment, the judgment module is used to judge that the battery has a fault when the propagation time is greater than a first preset range of a preset propagation time, or when the signal amplitude is less than a second preset range of the preset signal amplitude. For example, the judgment module is also used to determine that the battery is in a full state of charge when the propagation time is less than the first preset range of the preset propagation time and the signal amplitude is less than a third preset range of the preset signal amplitude. The judgment module is also used to determine that the battery is in a short state of charge when the propagation time is less than the first preset range of the preset propagation time and the signal amplitude is less than a fourth preset range of the preset signal amplitude, wherein the second preset range>the fourth preset range>the third preset range. For example, the first preset range is more than 10μs; and / or, the second preset range is more than 70%; and / or, the third preset range is 0-30%; and / or, the fourth preset range is 30%-70%.

[0077] In one embodiment, the battery fault detection device further includes a first instruction sending module, wherein the first instruction sending module is used to send a first instruction for controlling the emission of ultrasonic pulse waves that penetrate the battery.

[0078] In one embodiment, the battery fault detection device further includes an amplification and filtering module, and the amplification and filtering module is used to amplify and filter the ultrasonic pulse wave signal data;

[0079] The battery fault detection device also includes a digital sampling module, which is used to perform digital sampling processing on the ultrasonic pulse wave signal data and determine the propagation time and signal amplitude of the ultrasonic pulse wave after passing through the battery.

[0080] The battery fault detection device is mainly used to implement a battery fault detection method at the software module level.

[0081] A battery fault detection device at a structural level is further provided below.

[0082] In a third aspect, the present application provides a battery failure detection device, see Figure 3 and Figure 4 , including: a clamping bracket 310, an ultrasonic transmitting probe 320, an ultrasonic receiving probe 330 and a system controller, the clamping bracket 310 is provided with a detection position 3111 for clamping the battery 2; the detection position 3111 is used to clamp the battery 2, such as a high-temperature lithium battery short section 2. Specifically, as shown in the figure, the high-temperature lithium battery short section 2 includes a high-temperature lithium battery pack 20, a connector 22, a vibration-damping rubber ring 23 and a pressure-resistant cylinder 21. The high-temperature lithium battery pack 20 is located in the pressure-resistant cylinder 21. The two ends of the high-temperature battery pack are respectively connected to two end covers, and the end covers are equipped with vibration-damping rubber rings 23. The two end covers of the high-temperature lithium battery pack 30 are respectively connected to contact pieces 22. Please combine Figure 4 , there is also an air gap 40 between the compression cylinder 21 and the high-temperature lithium battery pack 20. Of course, it should be noted that for a more detailed structure of the high-temperature lithium battery short section, please refer to the prior art, and this application will not go into details. In the present application, the high-temperature lithium battery short section can be placed in the detection position 3111 for clamping the battery 2 for detection. Furthermore, the clamping bracket 310 clamps the two ends of the battery through two pre-tightening cone sleeves 311, and the two pre-tightening cone sleeves 311 together form a detection position 3111 for clamping the battery; further, please combine Figure 3 and Figure 4 The clamping bracket 310 includes two pre-tightening cone sleeves 311 and an arc-shaped clamp 312. The two pre-tightening cone sleeves 311 are connected by the arc-shaped clamp 312. The arc-shaped clamp 312 has an arc-shaped groove. The arc-shaped groove of the arc-shaped clamp 312 and the two pre-tightening cone sleeves 311 are jointly formed to form a detection position 3111 for clamping the battery 2. The two pre-tightening cone sleeves 311 are also used to clamp the battery 2 placed at the detection position 3111. Further, the two pre-tightening cone sleeves 311 are liftable pre-tightening cone sleeves, so that they can play a further lifting and adjusting function.

[0083] See also Figure 3 and Figure 4 The ultrasonic transmitting probe 320 is arranged on one side of the clamping bracket 310 at the detection position 3111; the ultrasonic transmitting probe 320 is used to generate ultrasonic pulse waves, or in other words, the ultrasonic transmitting probe 320 is used to send ultrasonic pulse waves under the control of the system controller, which can also be understood as transmitting pulses. The ultrasonic receiving probe 330 is arranged on the other side of the clamping bracket 310 at the detection position 3111; the ultrasonic receiving probe is used to receive ultrasonic pulse waves after passing through the battery, or in other words, the ultrasonic receiving probe is used to receive ultrasonic pulse waves after passing through the battery under the control of the system controller, which can also be understood as the ultrasonic receiving probe is used to receive the transmission pulse.

[0084] The system controller is electrically connected to the ultrasonic transmitting probe and the ultrasonic receiving probe, respectively. In one embodiment, the system controller is used to execute the steps of the battery fault detection method described in any of the above embodiments. The system controller is used to control the ultrasonic transmitting probe to send an ultrasonic pulse wave for controlling the transmission of the battery. Specifically, the controller sends a first instruction for controlling the transmission of the ultrasonic pulse wave for the battery and then controls the ultrasonic transmitting probe to send an ultrasonic pulse wave for controlling the transmission of the battery through the first instruction. The system controller is used to obtain the ultrasonic pulse wave after transmission through the battery through the ultrasonic receiving probe.

[0085] Thus, the battery fault detection device is convenient for battery fault detection, especially for high-temperature lithium battery short section fault detection.

[0086] In one of the embodiments, the ultrasonic transmitting probe and the ultrasonic receiving probe are aligned during the battery detection process; thus, the transmission and reception of ultrasonic waves are facilitated.

[0087] In one embodiment, the ultrasonic transmitting probe is slidably arranged on one side of the clamping bracket at the detection position, and the ultrasonic receiving probe is slidably arranged on the other side of the clamping bracket at the detection position; in this way, it is convenient to perform overall detection of the short section of the high-temperature lithium battery by sliding the ultrasonic probe and the ultrasonic probe. For example, the ultrasonic transmitting probe is slidably arranged to have a first sliding displacement mechanism, and the ultrasonic receiving probe is slidably arranged to have a second sliding displacement mechanism, and the first sliding displacement mechanism and the second sliding displacement mechanism are both controlled by the system controller. The first sliding displacement mechanism and the second sliding displacement mechanism include but are not limited to a lead screw, a telescopic motor, a telescopic cylinder, etc.

[0088] In one embodiment, the fault diagnosis device also includes a high-power pulse generator, which is electrically connected to the system controller and coupled to the ultrasonic transmitting probe; the system controller controls the high-power pulse generator to generate a high-voltage pulse electrical signal to excite the ultrasonic transmitting probe to generate ultrasonic waves.

[0089] In one embodiment, the fault diagnosis device further comprises a programmable gain preamplifier, a waveform acquisition processing and monitor, and a fault analysis and diagnosis module, wherein the programmable gain preamplifier is electrically connected to the system controller and the ultrasonic receiving probe, respectively, the waveform acquisition processing and monitor is electrically connected to the system controller and the programmable gain preamplifier, and the fault analysis and diagnosis module is electrically connected to the system controller and the waveform acquisition processing and monitor, respectively. The programmable gain preamplifier is used to receive the transmitted ultrasonic pulse wave train under the control of the system controller and adaptively amplify and filter the transmitted ultrasonic pulse wave train. The waveform acquisition processing and monitor is used to digitally sample the amplified and filtered ultrasonic pulse wave train under the control of the system controller, and display and monitor the digitized ultrasonic pulse wave train and extract the propagation time and amplitude of the ultrasonic pulse wave train. The fault analysis and diagnosis module is used to perform fault analysis according to the propagation time and amplitude of the ultrasonic pulse wave train under the control of the system controller, diagnose battery faults, and preferably diagnose fault types such as internal charge state and defects.

[0090] The fault detection device for the high-temperature lithium battery short section provided by the present invention has no requirements on whether the high-temperature lithium battery short section is discharging. Fault detection can be performed only after the high-temperature lithium battery short section is drilled out of the well and discharged on the ground. There is no need to power off the high-temperature lithium battery short section, which eliminates the chance of contact between the aqueous solution and the battery during on-site maintenance, and completely avoids the occurrence of discharge short circuits, which causes the high-temperature lithium battery to burst and other dangerous situations. The fault detection device for the high-temperature lithium battery short section provided by the present invention has the advantages of safety, reliability and efficiency.

[0091] In a fourth aspect, the present application provides a method for diagnosing a battery fault using a fault diagnosis device, wherein the battery fault diagnosis device is the battery fault diagnosis device as described in any of the above embodiments, and the diagnosis method comprises the following steps:

[0092] Clamping the battery at the detection position of the clamping bracket;

[0093] The ultrasonic transmitting probe and the ultrasonic receiving probe are tightly attached to the opposite sides of the battery through the coupling agent, and the ultrasonic transmitting probe and the ultrasonic receiving probe are aligned and the central axes coincide with each other;

[0094] Sending a first instruction for controlling the ultrasonic pulse wave of the transmission battery through the system controller;

[0095] The ultrasonic transmitting probe transmits ultrasonic pulse waves into the battery under the control of the first instruction;

[0096] The ultrasonic receiving probe receives the ultrasonic pulse wave after passing through the inside of the battery under the control of the system controller;

[0097] The system controller is used to determine the propagation time and signal amplitude according to the received ultrasonic pulse wave, and compare the propagation time and signal amplitude of the ultrasonic pulse wave with the preset propagation time and the preset signal amplitude to determine whether the battery is faulty;

[0098] In one of the embodiments, after the ultrasonic receiving probe receives the ultrasonic pulse wave, the system controller controls the high-power pulse generator to amplify and filter the received ultrasonic pulse wave, and the system controller controls the waveform acquisition processor and monitor to digitally sample the ultrasonic wave after amplification and filtering and determine the propagation time and signal amplitude; the system controller controls the fault detection device to compare the propagation time and the preset signal amplitude with the propagation time of the ultrasonic pulse wave to determine whether the battery is faulty.

[0099] In one embodiment, the system controller controls a high-power pulse generator to excite the ultrasonic transmitting probe to transmit ultrasonic waves.

[0100] In a fifth aspect, the present application also provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the battery fault detection method described in any of the above embodiments are implemented.

[0101] In one embodiment, a computer device is provided. The computer device may be a terminal, that is, a device to be upgraded. The internal structure diagram thereof may be as follows: Figure 5 As shown. The computer device includes a processor, a memory, a network interface, a display screen and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with the server through a network connection. When the computer program is executed by the processor, a battery fault detection method is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a key, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse, etc.

[0102] Those skilled in the art will understand that Figure 5The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0103] In a sixth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the battery fault detection method described in any of the above embodiments are implemented.

[0104] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0105] The above-mentioned battery fault detection method and device, by combining ultrasonic non-destructive testing technology, judges whether the battery is faulty by the propagation time and signal amplitude of the ultrasonic pulse wave inside the battery. The detection process and analysis process are simple, convenient and fast, and can predict and detect the internal defects and potential hazards of the battery, and can detect the battery in use, which has practical economic and practical value. Moreover, the battery fault detection method of the present application is particularly suitable for the technical field of oil exploration and development, especially for the detection of high-temperature lithium battery short sections used in drilling measurement instruments in the technical field of drilling measurement instrument detection. It can judge the battery fault and status through ultrasonic detection, and then facilitate the prediction of the charge state of the high-temperature battery short section, and identify the high-temperature lithium battery with internal defects and potential hazards in advance. Moreover, for unused batteries, the power usage status can also be identified through ultrasonic detection, reducing the waste caused by direct disposal when the power is not used up.

[0106] The present application proposes a fault detection device and diagnostic method for a high-temperature lithium battery short section by combining ultrasonic nondestructive testing technology with the change of the physical state inside the lithium battery during the discharge process. The purpose of the present invention is to overcome the defects of the prior art, provide a fault detection device and diagnostic method for a high-temperature lithium battery short section, accurately and reliably monitor and evaluate the charge state, internal defects and potential hazards of the high-temperature lithium battery short section, and provide a safe, efficient and stable high-temperature lithium battery short section for downhole measurement while drilling, which can not only ensure that the measurement while drilling instrument can work continuously and reliably for a long time during a drilling process, but also avoid the ineffective consumption and waste of the limited capacity of the high-temperature battery short section. The fault detection device for the high-temperature lithium battery short section provided by the present invention has no requirements on whether the high-temperature lithium battery short section is discharging. As long as the high-temperature lithium battery short section is discharged from the well after being drilled out of the well and discharged on the ground, fault detection can be performed. There is no need to power off the high-temperature lithium battery short section, which eliminates the opportunity for the aqueous solution to contact the battery during on-site maintenance, and completely avoids the occurrence of discharge short circuits, which causes the high-temperature lithium battery to burst and other dangerous situations. The fault detection device for the high-temperature lithium battery short section provided by the present invention has the advantages of safety, reliability and efficiency. The fault diagnosis method for a high-temperature lithium battery pup provided by the present invention takes into account the presence of air inside the high-temperature lithium battery pup, as well as the presence of solid, liquid or colloidal electrolytes and possible gases in the high-temperature battery pack, and adopts a one-shot-one-receive transmission method to perform transmission detection on the high-temperature lithium battery pup with ultrasonic longitudinal waves, which has the advantages of simple detection principle, easy identification and analysis of waveform signals, and rapid and intuitive diagnosis results. In view of the shortcomings of the prior art in lacking means for detecting the state of charge and internal defects of high-temperature lithium battery pups, the present invention provides a fault detection device and diagnosis method for a high-temperature lithium battery pup, which is applied to the maintenance of high-temperature lithium battery pups in drilling measurement instruments, and has significant advantages in terms of safety, reliability, efficiency, simplicity of detection principle, easy identification and analysis of waveform signals, and rapid and intuitive diagnosis results, thereby improving the utilization efficiency of the limited capacity of high-temperature lithium battery pups.

[0107] It should be further explained that the working state detection of the high-temperature lithium battery short section in the prior art mainly relies on the external characteristics such as internal resistance, voltage, and current exhibited by the high-temperature lithium battery. By collecting the current, voltage and other parameters output by the high-temperature lithium battery pack and comparing and analyzing them with the threshold, the state of charge of the high-temperature battery short section is evaluated and the remaining working time of the high-temperature battery short section is estimated, so as to prepare for the replacement of the high-temperature lithium battery pack. However, this detection method cannot directly obtain the state of charge of the high-temperature battery short section by measurement, and is affected by complex working conditions such as downhole temperature, vibration, and impact. Moreover, the internal defects and potential hazards of the high-temperature lithium battery short section cannot be predicted. In addition, during the drilling process, the number of high-temperature lithium battery packs consumed is huge, and the high-temperature lithium battery packs are often replaced during the drilling process. These replaced high-temperature lithium battery packs are often directly discarded without being tested, and are not reused, resulting in a great waste of high-temperature lithium batteries. Therefore, accurately and reliably monitoring and evaluating the state of charge, internal defects and potential hazards of the high-temperature lithium battery short section is a prerequisite for improving the discharge strategy to avoid ineffective consumption and waste of the limited capacity of the high-temperature battery short section, and to ensure the safe and efficient operation of the high-temperature battery short section. Based on the changes in the physical state of the lithium battery during the discharge process, this application proposes a fault detection device and diagnostic method for a high-temperature lithium battery short section, combined with ultrasonic non-destructive testing technology. Accurately and reliably monitor and evaluate the charge state, internal defects and potential hazards of the high-temperature lithium battery short section, and provide a safe, efficient and stable high-temperature lithium battery short section for downhole measurement while drilling, which can not only ensure that the measurement while drilling instrument can work continuously and reliably for a long time during a drilling process, but also avoid the ineffective consumption and waste of the limited capacity of the high-temperature battery short section.

[0108] The present invention provides a fault detection device and a diagnostic method for a high-temperature lithium battery pup joint. The fault detection device comprises: a pup joint clamping bracket, an ultrasonic transmitting probe, an ultrasonic receiving probe, a system controller, a high-power pulse generator, a programmable gain preamplifier, a waveform acquisition processor and monitor, and a fault diagnosis and analysis module.

[0109] The short section clamping bracket is used to clamp the two ends of the high-temperature lithium battery short section through a pre-tightening cone sleeve, and can adjust the height so that the high-temperature lithium battery short section remains level as a whole.

[0110] The ultrasonic transmitting probe is used to transmit ultrasonic pulse waves to the inside of the short section by clinging to the outer wall of the short section of the high-temperature lithium battery through a coupling agent. The ultrasonic pulse waves are reflected and transmitted through the multi-layer complex medium composed of the pressure-resistant cylinder, air, and high-temperature lithium battery pack and propagate layer by layer.

[0111] The ultrasonic receiving probe is connected to the ultrasonic transmitting probe through an arc clamp and is located opposite to the ultrasonic transmitting probe. It is used to cling to the outer wall of the high-temperature lithium battery short section through a coupling agent to receive the transmitted ultrasonic pulse wave train propagating layer by layer along the inside of the short section.

[0112] The system controller is the control core of the entire detection device. It is used to set ultrasonic transmission and reception commands, data acquisition and storage instructions, trigger internal control instructions and synchronous clock signals, send transmission start pulses, acquisition start and fault diagnosis commands, etc.

[0113] The high-power pulse generator is electrically connected to the ultrasonic transmitting probe and the system controller, and is used to generate a high-voltage pulse electrical signal under the control of a transmitting command to stimulate the ultrasonic transmitting probe to generate an ultrasonic pulse signal.

[0114] The programmable gain preamplifier is electrically connected to the ultrasonic receiving probe and the system controller, and is used for receiving the transmitted ultrasonic pulse wave train under the control of the receiving command and adaptively amplifying and filtering the transmitted ultrasonic pulse wave train.

[0115] The waveform acquisition processing and monitoring device is electrically connected to the programmable gain preamplifier and the system controller, and is used to digitally sample the received transmitted ultrasonic pulse wave train under the control of the data acquisition storage instruction, and to display and monitor the digitized ultrasonic pulse wave train and extract the propagation time and amplitude of the ultrasonic pulse wave train.

[0116] The fault analysis and diagnosis module is electrically connected to the waveform acquisition and processing and monitoring device and the system controller, and is used to perform fault analysis according to the propagation time and amplitude of the ultrasonic pulse wave train under the control of the fault diagnosis command, and diagnose the internal charge state, defects and other fault types.

[0117] The fault detection device for the high-temperature lithium battery short section provided by the present invention has no requirements on whether the high-temperature lithium battery short section is discharging. Fault detection can be performed only after the high-temperature lithium battery short section is drilled out of the well and discharged on the ground. There is no need to power off the high-temperature lithium battery short section, which eliminates the chance of aqueous solution contacting the battery during on-site maintenance, and completely avoids dangerous situations such as discharge short circuits and explosions of high-temperature lithium batteries. The fault detection device for the high-temperature lithium battery short section provided by the present invention has the advantages of safety, reliability and efficiency. Taking the laws of ultrasonic propagation in multi-layer complex media such as high-temperature lithium battery short sections as theoretical guidance, combined with the layered structure inside the high-temperature lithium battery assembly, based on the fault detection device for the high-temperature lithium battery short section of the present invention, the present invention provides a fault diagnosis method for a high-temperature lithium battery short section, the method comprising:

[0118] Step 1: Fix the high-temperature lithium battery short section on the short section clamping bracket through the pre-tightening cone sleeve, and fine-tune the height to keep the high-temperature lithium battery short section level.

[0119] Step 2: Place the ultrasonic transmitting probe and the ultrasonic receiving probe tightly on the opposite sides of the outer wall of the high-temperature lithium battery short section through the coupling agent, and tighten them with an arc clamp so that the central axes of the ultrasonic transmitting probe and the ultrasonic receiving probe coincide with each other.

[0120] Step 3: Set the transmission, reception, collection and other instructions, as well as the detection time, amplitude threshold and detection times through the system controller to start the fault detection work, where the detection time is the time range in which the bottom transmission signal may appear, and the amplitude threshold is the amplitude threshold of the received bottom transmission signal. The detection time is the preset propagation time, and the amplitude threshold is the preset signal amplitude.

[0121] Step 4: The ultrasonic transmitting probe transmits ultrasonic pulse waves into the interior of the high-temperature lithium battery short section under the control of the transmitting command, and the ultrasonic receiving probe receives the ultrasonic pulse wave train transmitted through the interior of the high-temperature lithium battery short section under the control of the receiving command.

[0122] Step 5: The received ultrasonic pulse wave train is amplified, filtered, and digitally sampled, and information such as the propagation time and signal amplitude of the ultrasonic pulse wave train is extracted.

[0123] Step 6: Send the acquired propagation time and signal amplitude to the fault analysis and diagnosis module, and identify the fault type of the propagation time and signal amplitude according to the set detection time and amplitude threshold.

[0124] Step 7: Keep the high-temperature lithium battery short section horizontal and motionless, move the ultrasonic transmitting probe and the ultrasonic receiving probe along the length direction of the short section, and repeat steps 2 to 6.

[0125] Step 8: Rotate the high-temperature lithium battery short section 90°, and repeat steps 2 to 7 until the fault diagnosis of the high-temperature lithium battery short section is completed at four positions of 0°, 90°, 180°, and 270°. In other words, in the present application, the high-temperature lithium battery short section can be rotated to different angles to perform detection on multiple sides of the high-temperature lithium battery short section.

[0126] The fault diagnosis method of the high-temperature lithium battery short section provided by the present invention takes into account the presence of air inside the high-temperature lithium battery short section, and the presence of solid, liquid or colloidal electrolytes and possible gases in the high-temperature battery pack, and adopts a one-transmit-one-receive transmission method to perform transmission detection on the high-temperature lithium battery short section with ultrasonic longitudinal waves, which has the advantages of simple detection principle, easy identification and analysis of waveform signals, and fast and intuitive diagnosis results. The present invention provides a fault detection device and diagnosis method for a high-temperature lithium battery short section, and the fault detection device includes: a short section clamping bracket, an ultrasonic transmitting probe, an ultrasonic receiving probe, a system controller, a high-power pulse generator, a programmable gain preamplifier, a waveform acquisition processing and monitoring device, and a fault diagnosis and analysis module.

[0127] The short section clamping bracket includes a pre-tightening cone sleeve, a connecting rod, a leveling foot, etc., which is used to clamp the two ends of the high-temperature lithium battery short section through the pre-tightening cone sleeve, and the high-temperature lithium battery short section can be kept level as a whole by adjusting the leveling foot. The specifications of the high-temperature lithium battery short section that can be clamped include outer diameters of φ38mm, φ45mm and φ48mm, etc.

[0128] The ultrasonic transmitting probe is used to transmit ultrasonic pulse waves to the inside of the short section by clinging to the outer wall of the short section of the high-temperature lithium battery through a coupling agent. The ultrasonic pulse waves are reflected and transmitted through the multi-layer complex medium composed of the pressure-resistant cylinder, air, and high-temperature lithium battery pack and propagate layer by layer.

[0129] The ultrasonic receiving probe is connected to the ultrasonic transmitting probe through an arc clamp and is located opposite to the ultrasonic transmitting probe. It is used to cling to the outer wall of the high-temperature lithium battery short section through a coupling agent to receive the transmitted ultrasonic pulse wave train propagating layer by layer along the inside of the short section.

[0130] The ultrasonic transmitting probe and the ultrasonic receiving probe are both focused ultrasonic transducers, and the contact surfaces that are in close contact with the outer wall of the high-temperature lithium battery short section are both arc-shaped concave surfaces. The operating frequency range of the ultrasonic transmitting probe and the ultrasonic receiving probe is 400-800kHz, and the shape is a small cylinder with an outer diameter of no more than 10mm and a height of no more than 30mm.

[0131] The system controller is the control core of the entire detection device. It uses a field programmable logic device as the controller and generates command working timing through programming. It is used to set ultrasonic transmission and reception commands, data acquisition and storage instructions, and trigger internal control instructions and synchronous clock signals, send transmission start pulses, acquisition start and fault diagnosis commands, etc.

[0132] The high-power pulse generator, which consists of a square wave generator and a power amplifier, is electrically connected to the ultrasonic transmitter probe and the system controller to generate a high-voltage pulse electrical signal under the control of the transmission command to stimulate the ultrasonic transmitter probe to generate an ultrasonic pulse signal. The amplitude of the high-voltage pulse electrical signal is above 100V, and the pulse width is adjustable from 0 to 10μs.

[0133] The programmable gain preamplifier, which consists of an amplifier, a multi-way selector switch, a driver, etc., is electrically connected to the ultrasonic receiving probe and the system controller, and is used to receive the transmitted ultrasonic pulse wave train under the control of the receiving command and adaptively amplify and filter the transmitted ultrasonic pulse wave train. The programmable gain range is -40 to 60dB, with a step of 3dB.

[0134] The waveform acquisition processing and monitoring device is composed of an analog-to-digital converter, a digital signal processor, etc. It is electrically connected to the programmable gain preamplifier and the system controller. It is used to digitally sample the received transmitted ultrasonic pulse wave train under the control of the data acquisition and storage instructions, and to display and monitor the digitized ultrasonic pulse wave train and extract the propagation time and amplitude of the ultrasonic pulse wave train. The sampling frequency is 4MHz and the sampling accuracy is 16bits.

[0135] The fault analysis and diagnosis module is jointly implemented by a field programmable logic device and a digital signal processor, and is electrically connected to the waveform acquisition and processing and monitoring device and the system controller. It is used to perform fault analysis based on the propagation time and amplitude of the ultrasonic pulse wave train under the control of the fault diagnosis command, and diagnose internal charge status, defects and other fault types.

[0136] Based on the fault detection device of the high-temperature lithium battery short section of the present invention, the present invention provides a fault diagnosis method of the high-temperature lithium battery short section, the method comprising:

[0137] Step 1: Fix the high-temperature lithium battery short section on the short section clamping bracket through the pre-tightening cone sleeve, and fine-tune the height to keep the high-temperature lithium battery short section level.

[0138] Step 2: Place the ultrasonic transmitting probe and the ultrasonic receiving probe tightly on the opposite sides of the outer wall of the high-temperature lithium battery short section through the coupling agent, and tighten them with an arc clamp so that the central axes of the ultrasonic transmitting probe and the ultrasonic receiving probe coincide with each other.

[0139] Step 3: Set the transmission, reception, collection and other instructions, as well as the detection time, amplitude threshold and detection times through the system controller to start the fault detection work, where the detection time is the time range in which the bottom transmission signal may appear, and the amplitude threshold is the amplitude threshold of the received bottom transmission signal. According to the different specifications of the high-temperature lithium battery short section, set the detection time, amplitude threshold and detection times. The detection time setting range is 15-20μs, the amplitude threshold setting range is 50-80mV, and the detection times are set to 20-40 times.

[0140] Step 4: The ultrasonic transmitting probe transmits ultrasonic pulse waves into the interior of the high-temperature lithium battery short section under the control of the transmitting command, and the ultrasonic receiving probe receives the ultrasonic pulse wave train transmitted through the interior of the high-temperature lithium battery short section under the control of the receiving command.

[0141] Step 5: The received ultrasonic pulse wave train is amplified, filtered, and digitally sampled, and information such as the propagation time and signal amplitude of the ultrasonic pulse wave train is extracted.

[0142] Step 6: Send the acquired propagation time and signal amplitude to the fault analysis and diagnosis module, and identify the fault type of the propagation time and signal amplitude according to the set detection time and amplitude threshold.

[0143] Step 7: Keep the high-temperature lithium battery short section horizontal and motionless, move the ultrasonic transmitting probe and the ultrasonic receiving probe along the length direction of the short section, and repeat steps 2 to 6.

[0144] Step 8: Rotate the high-temperature lithium battery short section 90° and repeat steps 2 to 7 until the fault diagnosis of the high-temperature lithium battery short section is completed at four positions: 0°, 90°, 180°, and 270°.

[0145] Specific fault type discrimination criteria: When the propagation time is much greater than the set detection time (the difference between the two is more than 10μs), and the signal amplitude is much less than the set amplitude threshold (a decrease of more than 70%), it is considered that there is a defect inside the high-temperature lithium battery short section; when the propagation time is within the set detection time range, and the signal amplitude decreases by 0-30% compared with the set amplitude threshold, the high-temperature lithium battery short section is fully charged, and the high-temperature lithium battery short section can work normally for more than 100 hours continuously, and when the decrease is more than 30%, the charge state of the high-temperature lithium battery short section decreases rapidly, the output voltage is very small, and the remaining working time is very short, only a few hours.

[0146] The present invention provides a fault detection device and diagnosis method for a high-temperature lithium battery short section, the device includes a short section clamping bracket, an ultrasonic transmitting probe, an ultrasonic receiving probe, a system controller, a high-power pulse generator, a programmable gain preamplifier, a waveform acquisition processing and monitoring device, and a fault diagnosis and analysis module. The fault detection device and diagnosis method provided by the present invention adopts a one-transmit-one-receive transmission method to perform transmission detection on the high-temperature lithium battery short section with ultrasonic longitudinal waves, and has the advantages of simple detection principle, easy identification and analysis of waveform signals, and fast and intuitive diagnosis results; and there is no need to power off the high-temperature lithium battery short section during detection, eliminating the chance of contact between the aqueous solution and the battery during on-site maintenance, and completely avoiding the occurrence of discharge short circuits, causing high-temperature lithium batteries to burst and other dangerous situations.

[0147] The technical features of the above-described embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. It should be noted that "in one embodiment", "for example", "for example", etc. in this application are intended to illustrate the present application, rather than to limit the present application. The above-described embodiments only express several implementation methods of the present application, and the description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the patent application. It should be pointed out that for a person of ordinary skill in the art, without departing from the concept of the present application, several variations and improvements can also be made, which all belong to the scope of protection of the present application. Therefore, the scope of protection of the patent in this application shall be subject to the attached claims.

Claims

1. A method for detecting a battery or a short battery section fault, characterized in that: The steps include: Obtaining the propagation time and signal amplitude of the ultrasonic pulse wave after passing through the battery or battery short section; According to the propagation time and signal amplitude of the ultrasonic pulse wave, the preset propagation time and preset signal amplitude are compared to determine whether the battery or the battery short section is faulty.

2. The method for detecting battery or battery short section fault according to claim 1, characterized in that: The step of comparing the propagation time and the signal amplitude of the ultrasonic pulse wave with the preset propagation time and the preset signal amplitude to determine whether the battery or the battery section is faulty includes: When the propagation time is greater than a first preset range of a preset propagation time, or when the signal amplitude is less than a second preset range of a preset signal amplitude, it is determined that the battery or the battery section has a fault.

3. The method for detecting battery or battery short section fault according to claim 2, characterized in that: The step of comparing the propagation time and the signal amplitude of the ultrasonic pulse wave with the preset propagation time and the preset signal amplitude to determine whether the battery or the battery section is faulty also includes: When the propagation time is less than the first preset range of the preset propagation time, and the signal amplitude is less than the third preset range of the preset signal amplitude, it is determined that the battery or battery short section is in a full state of charge; When the propagation time is less than the first preset range of the preset propagation time, and the signal amplitude is less than the fourth preset range of the preset signal amplitude, the battery or battery short section is determined to be in a transient state of charge, wherein the second preset range>the fourth preset range>the third preset range.

4. The method for detecting battery or battery short section fault according to claim 3, characterized in that: The first preset range is greater than 10 μs; and / or, the second preset range is greater than 70%; and / or, the third preset range is 0-30%; and / or, the fourth preset range is 30%-70%.

5. The method for detecting battery or battery short section fault according to claim 1, characterized in that: Before the step of obtaining the propagation time and signal amplitude of the ultrasonic pulse wave after passing through the battery or the battery short section, the battery or battery short section fault detection method further comprises the following steps: sending a first instruction for controlling the emission of the ultrasonic pulse wave that passes through the battery or the battery short section; and / or, The step of obtaining the propagation time and signal amplitude of the ultrasonic pulse wave after passing through the battery or the battery short section includes: obtaining the received ultrasonic pulse wave signal data after passing through the battery; The ultrasonic pulse wave signal data is amplified, filtered, and digitally sampled to determine the propagation time and signal amplitude of the ultrasonic pulse wave after passing through the battery or the battery short section.

6. A battery or battery short section fault detection device, characterized in that: include: An acquisition module, used to acquire the propagation time and signal amplitude of the ultrasonic pulse wave after passing through the battery or the battery short section; The judgment module is used to judge whether the battery or the battery short section is faulty according to the propagation time and signal amplitude of the ultrasonic pulse wave, compared with the preset propagation time and the preset signal amplitude.

7. A battery or battery short section fault diagnosis device, characterized in that: include: A clamping bracket, wherein the clamping bracket is provided with a detection position for clamping a battery or a battery short section; An ultrasonic transmitting probe is arranged on one side of the clamping bracket at the detection position; An ultrasonic receiving probe is arranged on the other side of the clamping bracket at the detection position; A system controller, electrically connected to the ultrasonic transmitting probe and the ultrasonic receiving probe respectively; Preferably, the system controller is used to perform the method steps as described in any one of claims 1 to 5; Preferably, the ultrasonic transmitting probe and the ultrasonic receiving probe are aligned during the battery or battery short section detection process; Preferably, the ultrasonic transmitting probe is slidably disposed on one side of the clamping bracket at the detection position, and the ultrasonic receiving probe is slidably disposed on the other side of the clamping bracket at the detection position; Preferably, the clamping bracket clamps the two ends of the battery or the battery nipple through two pre-tightening cone sleeves, and the two pre-tightening cone sleeves together form a detection position for clamping the battery or the battery nipple; Preferably, the fault diagnosis device further comprises a high-power pulse generator, the high-power pulse generator is electrically connected to the system controller, and the high-power pulse generator is coupled to the ultrasonic transmitting probe; Preferably, the fault diagnosis device also includes a programmable gain preamplifier, a waveform acquisition processing and monitor, and a fault analysis and diagnosis module, the programmable gain preamplifier is electrically connected to the system controller and the ultrasonic receiving probe, respectively, the waveform acquisition processing and monitor is electrically connected to the system controller and the programmable gain preamplifier, and the fault analysis and diagnosis module is electrically connected to the system controller and the waveform acquisition processing and monitor, respectively.

8. A method for diagnosing battery faults using a battery or battery short section fault diagnosis device, characterized in that: The battery or battery short section fault diagnosis device is the battery or battery short section fault diagnosis device according to claim 7, and the diagnosis method comprises the following steps: Clamping the battery or battery section at the detection position of the clamping bracket; Place the ultrasonic transmitting probe and the ultrasonic receiving probe on opposite sides of the battery or the battery short section through the coupling agent, and align the ultrasonic transmitting probe and the ultrasonic receiving probe with their central axes overlapping; Sending a first instruction for controlling the emission of ultrasonic pulse waves that transmit the battery or the battery subsection through the system controller; The ultrasonic transmitting probe transmits ultrasonic pulse waves into the battery or the battery short section under the control of the first instruction; The ultrasonic receiving probe receives the ultrasonic pulse wave after passing through the battery or the battery short section under the control of the system controller; The system controller is used to determine the propagation time and signal amplitude according to the received ultrasonic pulse wave, and compare the propagation time and signal amplitude of the ultrasonic pulse wave with the preset propagation time and the preset signal amplitude to determine whether the battery or the battery short section is faulty; Preferably, after the ultrasonic receiving probe receives the ultrasonic pulse wave, the system controller controls the high-power pulse generator to amplify and filter the received ultrasonic pulse wave, and the system controller controls the waveform acquisition processor and monitor to digitally sample the ultrasonic wave that has been amplified and filtered and determine the propagation time and signal amplitude; the system controller controls the fault detection device to compare the propagation time and the signal amplitude of the ultrasonic pulse wave with the preset propagation time and the preset signal amplitude to determine whether the battery or the battery section is faulty.

9. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the battery or battery short section fault detection method described in any one of claims 1 to 5 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the battery or battery short section fault detection method according to any one of claims 1 to 5 are implemented.

Images