A method, device and medium for detecting air tightness of battery box cover

Abstract

The present invention discloses an airtightness detection method, equipment and medium for a battery box cover, relates to the field of battery airtightness detection, solves the problem that the detection result of the existing airtightness detection is delayed, thereby delaying the rework of defective parts, and the detection method steps specifically include: step S101, obtaining the measured specification parameters of the battery box through a measuring element; step S102, performing specification detection on the battery box body and the battery cover body of the battery box; step S103, detecting the compatibility between the battery slot and the battery in the battery box; step S104, detecting the normal airtightness of the battery box; step S105, detecting the abnormal airtightness stability of the battery box; step S106, displaying the specification detection result and the airtightness detection result of the battery box on a display terminal. The present invention realizes comprehensive airtightness detection of the battery box cover based on multi-source data.

Description

Technical Field

[0001] The present invention belongs to the field of battery air tightness detection, and relates to battery box air tightness detection technology, and specifically to an air tightness detection method, equipment and medium for a battery box cover. Background Art

[0002] As an important part of electric vehicles, the battery box is mainly responsible for storing and protecting battery modules. It also bears the functions of isolation and heat dissipation. Ensuring the airtightness of the battery box plays an important role in preventing the battery modules from being polluted and damaged by the external environment. The purpose of the battery box airtightness test is to verify whether the battery box has sufficient sealing to prevent the penetration of gas, liquid or solid impurities. If the airtightness does not meet the standard, it will lead to safety hazards including but not limited to damage to the battery module and degradation of battery performance.

[0003] Under the current technical background, the existing airtightness detection technology uses professional testing instruments to perform airtightness detection on the assembled battery box. There are rigid requirements for the testing environment and testing equipment, and the testing link is at the later stage of the battery box production process. The lag in the test results greatly slows down the rework of the battery box airtightness problem. Therefore, how to achieve comprehensive airtightness detection of the battery box cover based on multi-source data is the current problem;

[0004] To this end, we propose a method, equipment and medium for detecting the air tightness of a battery box cover. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention aims to provide a method, device and medium for detecting the air tightness of a battery box cover.

[0006] The technical problems to be solved by the present invention are:

[0007] The problem of how to achieve comprehensive airtightness detection of battery box cover based on multi-source data.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A method for detecting the air tightness of a battery box cover, the detection method specifically comprises the following steps:

[0010] Step S101, obtaining measured specification parameters of the battery box through a measuring element;

[0011] Step S102, performing specification inspection on the battery box body and the battery cover body of the battery box;

[0012] Step S103, detecting the compatibility between the battery slots and the batteries in the battery box;

[0013] Step S104, testing the normal air tightness of the battery box;

[0014] Step S105, testing the abnormal airtight stability of the battery box;

[0015] Step S106: the display terminal displays the specification test results and the air tightness test results of the battery box.

[0016] Furthermore, the box specification data includes the measured box length, measured box width, measured box height and measured box thickness of the battery box;

[0017] The cover specification data includes the measured cover length, measured cover width and measured cover thickness of the battery cover;

[0018] The battery slot specification data includes the measured slot length, measured slot width and measured slot depth of the battery slot in the battery box;

[0019] The standard specification data includes the standard box length, standard box width, standard box height, standard cover thickness, standard slot length, standard slot width and standard slot depth of the battery box.

[0020] Furthermore, in step S102, the specification detection process of the battery box and the battery cover is specifically as follows:

[0021] Obtain the actual measured box length of the battery box and the standard box length of the battery box, and calculate the box length deviation value of the battery box according to the formula: box length deviation value = |actual measured box length - standard box length|;

[0022] Compare the box length deviation value of the battery box with the deviation critical value;

[0023] If the box length deviation value is greater than the deviation critical value, a specification abnormality signal is generated;

[0024] If the box length deviation value is less than or equal to the deviation critical value, the measured box width of the battery box and the standard box width of the battery box are obtained. Similarly, the box width deviation value of the battery box calculated according to the formula is compared with the deviation critical value.

[0025] If the box width deviation value is greater than the deviation threshold, a specification abnormality signal is generated;

[0026] If the box width deviation value is less than or equal to the deviation critical value, the measured box height of the battery box and the standard box height of the battery box are obtained. Similarly, the box height deviation value of the battery box calculated according to the formula is compared with the deviation critical value.

[0027] If the box height deviation value is greater than the deviation threshold, a specification abnormality signal is generated;

[0028] If the cabinet height deviation value is less than or equal to the deviation threshold value, no additional operation will be performed;

[0029] Obtain the measured cover length and measured cover width of the battery cover and obtain the measured box thickness of the battery box;

[0030] Construct a box fitting relationship equation, and substitute the corresponding values ​​into the box fitting relationship equation;

[0031] If the box fitting relationship is not established, a specification abnormality signal is generated;

[0032] If the box fitting relationship is established, no additional operation is performed;

[0033] Among them, the box body fitting relationship is specifically:

[0034] Standard box length - 2 × measured box thickness ≤ measured cover length ≤ standard box length;

[0035] Standard box width - 2 × measured box thickness ≤ measured cover width ≤ standard box width.

[0036] Furthermore, the adaptability test process in step S103 is specifically as follows:

[0037] Obtain the measured slot length, measured slot width, and measured slot depth of the battery slot in the battery box, and also obtain the standard battery length, standard battery width, and standard battery height of the battery corresponding to the battery box;

[0038] Compare the measured length of the battery slot in the battery box with the standard battery length corresponding to the battery box;

[0039] If the measured cell length is less than the standard battery length, a specification abnormality signal is generated;

[0040] If the measured slot length is greater than or equal to the standard battery length, the length deviation value of the battery slot in the battery box is calculated by subtracting the standard battery length from the measured slot length;

[0041] Similarly, the measured slot width of the battery slot in the battery box is compared with the standard battery width corresponding to the battery box;

[0042] If the measured cell width is smaller than the standard cell width, a specification abnormality signal is generated;

[0043] If the measured slot width is greater than or equal to the standard battery width, the width deviation value of the battery slot in the battery box is calculated by subtracting the standard battery width from the measured slot width;

[0044] Obtain the measured depth of the battery slots in the battery box and the standard battery height of the batteries corresponding to the battery box;

[0045] The center of gravity of the battery is taken as the reference standard, that is, half of the height of the standard battery is taken as the reference depth of the battery slot, and the battery instability value of the battery slot in the battery box is calculated;

[0046] Compare the battery instability value of each battery slot in the battery box with the stability judgment threshold one by one;

[0047] If the battery instability value of any battery slot in the battery box is greater than the stability judgment threshold, a specification abnormality signal is generated;

[0048] If the battery instability values ​​of all battery slots in the battery box are less than or equal to the stability judgment threshold, a normal specification signal is generated.

[0049] Furthermore, in step S106, the working process of the display terminal is as follows:

[0050] After the battery box completes the specification detection and the battery stability detection, it generates a specification abnormality signal or a specification normal signal and sends it to the display terminal, and the display terminal displays the specification abnormality signal or the specification normal signal;

[0051] If the display terminal receives a signal indicating an abnormal specification, the staff will rework or discard the battery box;

[0052] If the display terminal receives a signal that the specifications are normal, the staff will transfer the battery box to the air tightness test.

[0053] Furthermore, in step S104, the normal air tightness detection process is specifically as follows:

[0054] Install the batteries into the battery slots in the battery box, set an air pressure sensor inside the battery box, and then fit the battery cover into the battery box;

[0055] Remove the one-way air valve on the battery box and inject the leak detection medium into the battery box through the air valve port;

[0056] The real-time internal air pressure of the battery box is obtained through the air pressure sensor. When the real-time internal air pressure reaches the standard test air pressure, the injection of the leak detection medium is stopped and the one-way air valve is reinstalled to the air valve port and the timing is started;

[0057] Draw the pressure change curve based on the timing result and the real-time internal pressure of the battery box, and calculate the medium leakage rate of the battery box;

[0058] Compare the medium leakage rate of the battery box with the standard leakage rate range;

[0059] If the medium leakage rate of the battery box belongs to the standard leakage rate range, the normal air tightness test result of the battery box is judged to be qualified for normal air tightness;

[0060] If the medium leakage rate of the battery box does not belong to the standard leakage rate range, the normal air tightness test result of the battery box is determined to be unqualified for normal air tightness.

[0061] Furthermore, in step S105, the abnormal airtight stability detection process is specifically as follows:

[0062] Remove the one-way air valve on the battery box, inject the leak detection medium into the battery box through the air valve port, stop injecting the leak detection medium when the real-time internal air pressure of the battery box reaches the critical test air pressure, reinstall the one-way air valve to the air valve port and start timing;

[0063] When the real-time internal air pressure of the battery box drops to the standard test air pressure, stop timing and record the timing result as the exhaust time. Calculate the air pressure adjustment rate of the battery box:

[0064] Compare the gas pressure regulation rate of the battery box with the standard regulation rate range;

[0065] If the value of the air pressure regulation rate belongs to the standard regulation rate range, the abnormal airtightness stability test result of the battery box is determined to be qualified;

[0066] If the value of the air pressure regulation rate does not belong to the standard regulation rate range, the abnormal airtightness stability test result of the battery box is determined to be unqualified for the abnormal airtightness stability.

[0067] Furthermore, in step S106, the working process of the display terminal further includes:

[0068] If the normal airtightness of the battery box is qualified and the abnormal airtightness stability is qualified, no operation is performed;

[0069] If the normal airtightness of the battery box is not up to standard or the abnormal airtightness stability of the battery box is not up to standard, the staff will rework or discard the battery box.

[0070] The present invention further provides an electronic device, characterized in that the electronic device comprises:

[0071] A memory storing a computer program;

[0072] A processor is communicatively connected to the memory, and when the computer program is executed by the processor, a method for detecting the air tightness of a battery box cover is implemented.

[0073] The present invention also provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, a method for detecting the air tightness of a battery box cover is implemented.

[0074] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0075] 1. The present invention first obtains the measured specification parameters of the battery box through the measuring element, then performs specification detection on the battery box body and the battery cover of the battery box, then detects the compatibility between the battery slot and the battery in the battery box, and then uses the display terminal to display the specification detection result of the battery box. At this point, the pre-detection process of the airtightness detection is completed;

[0076] 2. The present invention also performs normal air tightness testing on the battery box that has passed the pre-test, and also tests the abnormal air tightness stability of the battery box, and finally displays the air tightness test results of the battery box through a display terminal. The present invention realizes a comprehensive air tightness test of the battery box cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0078] Figure 1 is a flow chart of the method of the present invention;

[0079] Figure 2 This is a physical structural diagram of the battery box in the present invention;

[0080] Figure 3 It is a physical schematic diagram of the battery box and the battery cover in the present invention;

[0081] Figure 4 It is a structural schematic diagram of the battery tank in the present invention;

[0082] Figure 5 It is a schematic diagram of the operation of specification detection in the present invention;

[0083] Figure 6 It is a schematic diagram of the principle of conventional air tightness detection in the present invention;

[0084] Figure 7 It is a schematic diagram of the physical structure of the electronic device in the present invention. DETAILED DESCRIPTION

[0085] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0086] Example 1: Please refer to Figure 1-Figure 6 As shown, the technical solution provided by the present invention is: a method for detecting the air tightness of a battery box cover, the method steps specifically comprising:

[0087] Step S101, obtaining measured specification parameters of the battery box through a measuring element;

[0088] In step S101, various specification parameters of the battery box are measured, and the specification measurement process is as follows;

[0089] See also Figure 2 As shown, in this embodiment, the battery box is composed of a battery box body, a battery cover body and batteries. The bottom of the battery box body is provided with a plurality of battery slots for installing batteries. After the batteries are installed, the battery cover body is installed on the top of the battery box body to complete the battery assembly. It should be specifically noted that the battery box body, the battery cover body and the batteries involved in this embodiment are all regarded as products of the same batch and the same specifications;

[0090] See also Figure 3 and Figure 4 As shown, the box body specification data, cover body specification data and battery slot specification data of the battery box are obtained by measuring components;

[0091] like Figure 3 As shown, the box specification data includes the measured box length, measured box width, measured box height and measured box thickness of the battery box;

[0092] The cover specification data includes the measured cover length, measured cover width and measured cover thickness of the battery cover;

[0093] like Figure 4 As shown, the battery slot specification data includes the measured slot length, measured slot width and measured slot depth of the battery slot in the battery box;

[0094] Step S102, performing specification inspection on the battery box body and the battery cover body of the battery box;

[0095] In step S102, the battery box body and the battery cover of the battery box are respectively tested for specifications, and the testing process is as follows:

[0096] Obtaining standard specification data of the battery box, the standard specification data including standard box length, standard box width, standard box height, standard cover thickness, standard slot length, standard slot width and standard slot depth of the battery box. In this embodiment, the standard specification data of the battery box is pre-stored in a database;

[0097] The box body specification data, cover body specification data and battery slot specification data of the battery box are compared with the standard specification data of the battery box. The specific comparison process is as follows:

[0098] Obtain the measured box length of the battery box and the standard box length of the battery box, and calculate the box length deviation value of the battery box according to the formula. The formula is as follows:

[0099] Box length deviation value = |actual box length - standard box length|;

[0100] Compare the box length deviation value of the battery box with the deviation critical value;

[0101] If the box length deviation value is greater than the deviation critical value, a specification abnormality signal is generated;

[0102] If the box length deviation value is less than or equal to the deviation critical value, the measured box width of the battery box and the standard box width of the battery box are obtained. Similarly, the box width deviation value of the battery box calculated according to the formula is compared with the deviation critical value.

[0103] If the box width deviation value is greater than the deviation threshold, a specification abnormality signal is generated;

[0104] If the box width deviation value is less than or equal to the deviation critical value, the measured box height of the battery box and the standard box height of the battery box are obtained. Similarly, the box height deviation value of the battery box calculated according to the formula is compared with the deviation critical value.

[0105] If the box height deviation value is greater than the deviation threshold, a specification abnormality signal is generated;

[0106] If the box height deviation value is less than or equal to the deviation critical value, proceed to the subsequent detection steps;

[0107] Obtain the measured cover length and measured cover width of the battery cover and obtain the measured box thickness of the battery box;

[0108] Construct a box-fitting relationship, which specifically includes:

[0109] Standard box length - 2 × measured box thickness ≤ measured cover length ≤ standard box length;

[0110] Standard box width - 2 × measured box thickness ≤ measured cover width ≤ standard box width;

[0111] Substitute the above values ​​into the box fitting relationship;

[0112] If the box fitting relationship is not established, a specification abnormality signal is generated;

[0113] If the box fitting relationship is established, proceed to the subsequent testing steps;

[0114] In actual work, cases where the box fitting relationship does not hold include: the battery cover is too long / too wide or too short / too narrow. For example, when the measured cover length of the battery cover is greater than the standard box length, the battery cover is too long. Please refer to Figure 5As shown in the figure, when the measured cover length of the battery cover is less than the value of (standard box length - 2 × measured box thickness), the battery cover is too short;

[0115] Step S103, detecting the compatibility between the battery slots and the batteries in the battery box;

[0116] In step S103, a stability test is performed on the batteries in the battery box, and the stability test process is specifically as follows;

[0117] Obtaining the measured slot length, measured slot width, and measured slot depth of the battery slot in the battery box, and also obtaining the standard battery length, standard battery width, and standard battery height of the battery corresponding to the battery box. It should be specifically noted that the standard battery length, standard battery width, and standard battery height of the battery box are all taken from the standard specification data of the battery corresponding to the battery box, and the standard specification data of the battery is pre-stored in the database;

[0118] Compare the measured length of the battery slot in the battery box with the standard battery length corresponding to the battery box;

[0119] If the measured cell length is less than the standard battery length, a specification abnormality signal is generated;

[0120] If the measured slot length is greater than or equal to the standard battery length, the measured slot length is subtracted from the standard battery length to calculate the length deviation value CPi of the battery slot in the battery box, where i is the battery slot serial number, i is a non-zero natural number, the upper limit value of i is n, and the value of n is equal to the number of battery slots in the battery box;

[0121] Similarly, the measured slot width of the battery slot in the battery box is compared with the standard battery width corresponding to the battery box;

[0122] If the measured cell width is smaller than the standard cell width, a specification abnormality signal is generated;

[0123] If the measured slot width is greater than or equal to the standard battery width, the standard battery width is subtracted from the measured slot width to calculate the width deviation value KPi of the battery slot in the battery box;

[0124] Obtain the measured slot depth of the battery slot in the battery box and the standard battery height of the battery corresponding to the battery box. It should be specifically noted that the function of the battery slot includes but is not limited to limiting the position of the battery, thereby preventing the battery from being bumped due to collision, bumps, etc. during the use of the battery box;

[0125] If the depth of the battery slot is too small, the battery slot cannot limit the position of the battery. If the depth of the battery slot is too large, it is not convenient to install the battery. Therefore, in this embodiment, the center of gravity of the battery is taken as the reference standard, that is, half of the height of the standard battery is the reference slot depth CS of the battery slot.

[0126] The battery instability value BWi of the battery slot in the battery box is calculated according to the formula. The specific formula is as follows:

[0127] BWi=(BC×KPi+BK×CPi-CPi×KPi)×s1+(CS-SSi)×s2;

[0128] Among them, BC is the standard tank length, BK is the standard tank width, SSi is the measured tank depth, s1 is the lateral instability coefficient of the battery box, s2 is the longitudinal instability coefficient of the battery tank, and the values ​​of s1 and s2 are both greater than zero;

[0129] Compare the battery instability value of each battery slot in the battery box with the stability judgment threshold one by one;

[0130] If the battery instability value of any battery slot in the battery box is greater than the stability judgment threshold, a specification abnormality signal is generated;

[0131] If the battery instability values ​​of all battery slots in the battery box are less than or equal to the stability judgment threshold, a specification normal signal is generated;

[0132] After the above detection is completed, the following detection steps are also included, as follows:

[0133] Step S104, testing the normal air tightness of the battery box;

[0134] In step S104, the specific process of performing normal air tightness test on the battery box that has passed the pre-test is as follows:

[0135] Install the batteries into the battery slots in the battery box, set up an air pressure sensor inside the battery box, and then fit the battery cover into the battery box. At this point, the battery box is assembled.

[0136] It should be specifically noted that a gas valve port is also provided on the battery box body of the battery box. In the actual working process, the one-way gas valve is used to realize the one-way exhaust of the battery box. For example, when the internal gas pressure of the battery box is normal, the battery box will not exhaust gas to the outside through the one-way gas valve. When the internal gas pressure of the battery box is abnormal (too high), the battery box exhausts gas to the outside through the one-way gas valve to avoid battery cracking caused by excessive internal gas pressure of the battery box.

[0137] Remove the one-way air valve on the battery box, and inject a leak detection medium into the battery box through the air valve port. In this embodiment, helium is preferably used as the leak detection medium;

[0138] The real-time internal air pressure SP of the battery box is obtained through the air pressure sensor. When the real-time internal air pressure reaches the standard test air pressure BP, the injection of the leak detection medium is stopped and the one-way air valve is reinstalled to the air valve port and the timing is started;

[0139] like Figure 6 As shown, the pressure change curve P / T is drawn according to the timing result and the real-time internal pressure of the battery box, and the medium leakage rate JL of the battery box is calculated according to the formula. The specific formula is as follows:

[0140] ;

[0141] Wherein, r is the time period number, m is the upper limit of r, the interval between the time corresponding to SP' and the time corresponding to SP is Δt, Δt is the unit time, and it should be specifically noted that the total timing time is T, T=m×Δt;

[0142] Compare the medium leakage rate of the battery box with the standard leakage rate range;

[0143] If the medium leakage rate of the battery box belongs to the standard leakage rate range, the normal air tightness test result of the battery box is judged to be qualified for normal air tightness;

[0144] If the medium leakage rate of the battery box does not belong to the standard leakage rate range, the normal air tightness test result of the battery box is judged to be unqualified for normal air tightness;

[0145] Among them, the values ​​of the standard leakage rate interval are all greater than zero;

[0146] Step S105, testing the abnormal airtight stability of the battery box;

[0147] In step S105, the battery box that has passed the normal airtightness test is subjected to an abnormal airtightness stability test, and the specific test process is as follows:

[0148] Remove the one-way air valve on the battery box, inject the leak detection medium into the battery box through the air valve port, stop injecting the leak detection medium when the real-time internal air pressure of the battery box reaches the critical test air pressure LP, reinstall the one-way air valve to the air valve port and start timing;

[0149] It should be specifically noted that the value of the critical test air pressure is always greater than the value of the standard test air pressure. When the value of the internal air pressure of the battery box is greater than the value of the standard test air pressure, the battery box is exhausted to the outside through the one-way air valve;

[0150] When the real-time internal air pressure of the battery box drops to the standard test air pressure BP, stop timing and record the timing result as the exhaust time PT. Calculate the air pressure adjustment rate TV of the battery box according to the formula. The specific formula is as follows:

[0151] TV=(LP-BP) / PT;

[0152] Compare the gas pressure regulation rate of the battery box with the standard regulation rate range;

[0153] If the value of the air pressure regulation rate belongs to the standard regulation rate range, the abnormal airtightness stability test result of the battery box is determined to be qualified;

[0154] If the value of the air pressure regulation rate does not belong to the standard regulation rate range, the abnormal airtightness stability test result of the battery box is determined to be unqualified;

[0155] It is understandable that if the air pressure adjustment rate of the battery box is less than the value of the standard adjustment rate interval, it means that the exhaust performance of the one-way air valve is insufficient. If the air pressure adjustment rate of the battery box is greater than the standard adjustment rate interval, it means that the air tightness of the one-way air valve is insufficient.

[0156] Step S106, the display terminal displays the specification detection result of the battery box. The working process of the display terminal is as follows:

[0157] After the battery box completes the specification detection and the battery stability detection, it generates a specification abnormality signal or a specification normal signal and sends it to the display terminal, and the display terminal displays the specification abnormality signal or the specification normal signal;

[0158] If the display terminal receives a signal indicating an abnormal specification, the staff will rework or discard the battery box;

[0159] If the display terminal receives a signal that the specifications are normal, the staff will transfer the battery box to the air tightness test step for subsequent testing. At this point, the pre-test of the battery box cover air tightness test is completed.

[0160] Furthermore, in step S106, the display terminal is also used to display the air tightness test result of the battery box, and the working process is as follows:

[0161] If the normal airtightness of the battery box is qualified and the abnormal airtightness stability is qualified, no operation is performed;

[0162] If the normal airtightness of the battery box is unqualified or the abnormal airtightness stability of the battery box is unqualified, the staff will rework or discard the battery box;

[0163] In this application, if corresponding calculation formulas appear, the above calculation formulas are all dimensionless and take their numerical calculations. The weight coefficients, proportional coefficients and other coefficients in the formulas are set to a result value obtained by quantifying each parameter. The size of the weight coefficient and the proportional coefficient can be determined as long as it does not affect the proportional relationship between the parameter and the result value.

[0164] Embodiment 2: Figure 7An example of a physical structure diagram of an electronic device is provided, and the electronic device may include: a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus. The processor may call the logic instructions in the memory to execute a method for detecting the air tightness of a battery box cover, and the method includes: obtaining the measured specification parameters of the battery box through a measuring element, performing specification detection on the battery box body and the battery cover body of the battery box, detecting the compatibility between the battery slot and the battery in the battery box, displaying the specification detection result of the battery box on a display terminal, detecting the normal air tightness of the battery box, detecting the abnormal air tightness stability of the battery box, and displaying the air tightness detection result of the battery box on a display terminal.

[0165] In addition, the logic instructions in the above-mentioned memory can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0166] On the other hand, the present application also provides a computer program product, which includes a computer program stored on a computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute a method for detecting the airtightness of a battery box cover provided by the above methods, the method including: obtaining the measured specification parameters of the battery box through a measuring element, performing specification detection on the battery box body and the battery cover of the battery box, detecting the compatibility between the battery slot and the battery in the battery box, displaying the specification detection result of the battery box on a display terminal, detecting the normal airtightness of the battery box, detecting the abnormal airtightness stability of the battery box, and displaying the airtightness detection result of the battery box on a display terminal.

[0167] On the other hand, the present application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the above-mentioned method for detecting the airtightness of a battery box cover, the method comprising: obtaining the measured specification parameters of the battery box through a measuring element, performing specification detection on the battery box body and the battery cover of the battery box, detecting the compatibility between the battery slot and the battery in the battery box, displaying the specification detection result of the battery box on a display terminal, detecting the normal airtightness of the battery box, detecting the abnormal airtightness stability of the battery box, and displaying the airtightness detection result of the battery box on a display terminal.

[0168] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0169] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0170] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for detecting the air tightness of a battery box cover, characterized in that: The detection method steps specifically include: Step S101, obtaining the box body specification data, cover body specification data and battery slot specification data of the battery box through the measuring element; The box body specification data includes the measured box body length, measured box body width, measured box body height and measured box body thickness of the battery box body; the cover body specification data includes the measured cover body length, measured cover body width and measured cover body thickness of the battery cover body; the battery slot specification data includes the measured slot body length, measured slot body width and measured slot body depth of the battery slot in the battery box body; Step S102, performing specification inspection on the battery box body and the battery cover body of the battery box; Step S103, detecting the compatibility between the battery slots and the batteries in the battery box; The specific process of testing the adaptability in step S103 is as follows: Obtain the measured slot length, measured slot width and measured slot depth of the battery slot in the battery box, and also obtain the standard battery length, standard battery width and standard battery height of the battery corresponding to the battery box; Compare the measured length of the battery slot in the battery box with the standard battery length corresponding to the battery box; If the measured cell length is less than the standard battery length, a specification abnormality signal is generated; If the measured slot length is greater than or equal to the standard battery length, the measured slot length is subtracted from the standard battery length to calculate the length deviation value CPi of the battery slot in the battery box, where i is the battery slot serial number, i is a non-zero natural number, the upper limit value of i is n, and the value of n is equal to the number of battery slots in the battery box; Similarly, the measured slot width of the battery slot in the battery box is compared with the standard battery width corresponding to the battery box; If the measured cell width is smaller than the standard cell width, a specification abnormality signal is generated; If the measured slot width is greater than or equal to the standard battery width, the standard battery width is subtracted from the measured slot width to calculate the width deviation value KPi of the battery slot in the battery box; Obtain the measured depth of the battery slots in the battery box and the standard battery height of the batteries corresponding to the battery box; The center of gravity of the battery is taken as the reference standard, that is, half of the standard battery height is taken as the reference slot depth CS of the battery slot, and the battery instability value BWi of the battery slot in the battery box is calculated according to the formula. The specific formula is as follows: BWi=(BC×KPi+BK×CPi-CPi×KPi)×s1+(CS-SSi)×s2; Among them, BC is the standard tank length, BK is the standard tank width, SSi is the measured tank depth, s1 is the lateral instability coefficient of the battery box, s2 is the longitudinal instability coefficient of the battery tank, and the values ​​of s1 and s2 are both greater than zero; Compare the battery instability value of each battery slot in the battery box with the stability judgment threshold one by one; If the battery instability value of any battery slot in the battery box is greater than the stability judgment threshold, a specification abnormality signal is generated; If the battery instability values ​​of all battery slots in the battery box are less than or equal to the stability judgment threshold, a specification normal signal is generated; Step S104, testing the normal air tightness of the battery box; Step S105, testing the abnormal airtight stability of the battery box; In step S105, the abnormal airtight stability detection process is specifically as follows: Remove the one-way air valve on the battery box, inject the leak detection medium into the battery box through the air valve port, stop injecting the leak detection medium when the real-time internal air pressure of the battery box reaches the critical test air pressure LP, reinstall the one-way air valve to the air valve port and start timing; When the real-time internal air pressure of the battery box drops to the standard test air pressure, stop timing and record the timing result as the exhaust time PT. Calculate the air pressure adjustment rate TV of the battery box according to the formula. The formula is as follows: TV=(LP-BP) / PT; Compare the gas pressure regulation rate of the battery box with the standard regulation rate range; If the value of the air pressure regulation rate belongs to the standard regulation rate range, the abnormal airtightness stability test result of the battery box is determined to be qualified; If the value of the air pressure adjustment rate does not belong to the standard adjustment rate range, the abnormal airtightness stability test result of the battery box is determined to be unqualified; Step S106: the display terminal displays the specification test results and the air tightness test results of the battery box.

2. The method for detecting the air tightness of a battery box cover according to claim 1, characterized in that: In step S102, the specification detection process of the battery box and the battery cover is as follows: Obtain the actual measured box length of the battery box and the standard box length of the battery box, and calculate the box length deviation value of the battery box according to the formula: box length deviation value = |actual measured box length - standard box length|; Compare the box length deviation value of the battery box with the deviation critical value; If the box length deviation value is greater than the deviation critical value, a specification abnormality signal is generated; If the box length deviation value is less than or equal to the deviation critical value, the measured box width of the battery box and the standard box width of the battery box are obtained. Similarly, the box width deviation value of the battery box calculated according to the formula is compared with the deviation critical value. If the box width deviation value is greater than the deviation threshold, a specification abnormality signal is generated; If the box width deviation value is less than or equal to the deviation critical value, the measured box height of the battery box and the standard box height of the battery box are obtained. Similarly, the box height deviation value of the battery box calculated according to the formula is compared with the deviation critical value. If the box height deviation value is greater than the deviation threshold, a specification abnormality signal is generated; If the cabinet height deviation value is less than or equal to the deviation threshold value, no additional operation will be performed; Obtain the measured cover length and measured cover width of the battery cover and obtain the measured box thickness of the battery box; Construct a box fitting relationship equation, and substitute the corresponding values ​​into the box fitting relationship equation; If the box fitting relationship is not established, a specification abnormality signal is generated; If the box fitting relationship is established, no additional operation is performed; Among them, the box body fitting relationship is specifically: Standard box length - 2 × measured box thickness ≤ measured cover length ≤ standard box length; Standard box width - 2 × measured box thickness ≤ measured cover width ≤ standard box width.

3. The method for detecting the air tightness of a battery box cover according to claim 1, characterized in that: In step S106, the working process of the display terminal is as follows: After the battery box completes the specification detection and the battery stability detection, it generates a specification abnormality signal or a specification normal signal and sends it to the display terminal, and the display terminal displays the specification abnormality signal or the specification normal signal; If the display terminal receives a signal of abnormal specifications, the staff will rework or discard the corresponding battery box; If the display terminal receives a signal that the specifications are normal, the staff will transport the corresponding battery box to the air tightness test.

4. The method for detecting the air tightness of a battery box cover according to claim 1, characterized in that: In step S104, the normal air tightness detection process is specifically as follows: Install the batteries into the battery slots in the battery box, set an air pressure sensor inside the battery box, and then fit the battery cover into the battery box; Remove the one-way air valve on the battery box and inject the leak detection medium into the battery box through the air valve port; The real-time internal air pressure of the battery box is obtained through the air pressure sensor. When the real-time internal air pressure reaches the standard test air pressure, the injection of the leak detection medium is stopped and the one-way air valve is reinstalled to the air valve port and the timing is started; Draw the pressure change curve based on the timing result and the real-time internal pressure of the battery box, and calculate the medium leakage rate of the battery box; Compare the medium leakage rate of the battery box with the standard leakage rate range; If the medium leakage rate of the battery box belongs to the standard leakage rate range, the normal air tightness test result of the battery box is judged to be qualified for normal air tightness; If the medium leakage rate of the battery box does not belong to the standard leakage rate range, the normal air tightness test result of the battery box is determined to be unqualified for normal air tightness.

5. The method for detecting air tightness of a battery box cover according to claim 1, characterized in that: In step S106, the working process of the display terminal further includes: If the normal airtightness of the battery box is qualified and the abnormal airtightness stability is qualified, no operation is performed; If the normal airtightness of the battery box is not up to standard or the abnormal airtightness stability of the battery box is not up to standard, the staff will rework or discard the battery box.

6. An electronic device, characterized in that: The electronic device comprises: A memory storing a computer program; A processor is communicatively connected to the memory, and when the computer program is executed by the processor, the airtightness detection method described in any one of claims 1 to 5 is implemented.

7. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the airtightness detection method described in any one of claims 1 to 5 is implemented.

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