Battery flatness control method, device and equipment based on pre-helium detection and medium

Abstract

The invention discloses a battery flatness control method, device and equipment based on pre-helium detection and a medium, and relates to the technical field of battery detection, and the method comprises the steps: carrying out the flatness detection of a target battery, so as to obtain the target flatness; controlling the target battery to enter a target cavity, and vacuumizing the target battery and the target cavity at the same time; after the vacuumizing treatment is finished, carrying out air tightness detection on the target battery; and after the air tightness detection is finished, controlling the pressure relief sequence of the target battery and the target cavity according to the size relationship between the target flatness and a preset flatness threshold value so as to realize the control of the flatness of the battery. According to the invention, the flatness of the battery can be effectively controlled and adjusted, so that the performance of the battery is ensured.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a method, device, equipment and medium for controlling battery flatness based on pre-helium inspection. Background Art

[0002] The flatness of the battery is one of the key indicators affecting battery performance, including the flatness of key positions such as the battery shell and the surface of the battery pole. Batteries with poor flatness will not be able to meet the requirements of battery performance consistency, thereby affecting other processes.

[0003] In terms of controlling the flatness of battery casings, current battery manufacturers only implement casing flatness control, that is, casing flatness control is mainly performed at the casing supplier. Once the casing and battery cells are assembled into a battery, the flatness of the battery cannot be further controlled. However, when the casing and battery cells are assembled into a battery, the flatness is very likely to change due to welding thermal stress, press-fitting processing, etc., and the transportation of batteries by robotic arms may also cause their flatness to change, resulting in the battery being dented, which in turn affects battery performance. Therefore, how to achieve effective control and adjustment of battery flatness to ensure battery performance is an issue that needs to be solved urgently. Summary of the Invention

[0004] The present application provides a battery flatness control method, device, equipment and medium based on pre-helium inspection, which can effectively realize the control and adjustment of battery flatness to ensure battery performance.

[0005] In a first aspect, an embodiment of the present application provides a battery flatness control method based on pre-helium inspection, the battery flatness control method comprising: Performing a flatness test on a target battery to obtain a target flatness; controlling the target battery to enter a target cavity, and simultaneously performing a vacuum process on the target battery and the target cavity; After the vacuum treatment is completed, performing an air tightness test on the target battery; After the airtightness test is completed, the pressure relief sequence of the target battery and the target cavity is controlled according to the magnitude relationship between the target flatness and a preset flatness threshold, so as to achieve control of the battery flatness.

[0006] In combination with the first aspect, in one embodiment, the flatness threshold includes a first flatness threshold and a second flatness threshold, and the second flatness threshold is greater than the first flatness threshold. Controlling the pressure relief order of the target battery and the target cavity based on the magnitude relationship between the target flatness and the preset flatness threshold includes: When it is detected that the target flatness is less than or equal to the first flatness threshold, performing pressure relief processing on the target battery and the target cavity in sequence; When it is detected that the target flatness is greater than the first flatness threshold, the pressure relief sequence of the target cavity and the target battery is controlled based on a magnitude relationship between the target flatness and the second flatness threshold.

[0007] In combination with the first aspect, in one embodiment, controlling the pressure relief sequence of the target cavity and the target battery based on the magnitude relationship between the target flatness and the second flatness threshold includes: When it is detected that the target flatness is greater than or equal to the second flatness threshold, performing pressure relief processing on the target cavity and the target battery in sequence; When it is detected that the target flatness is less than the second flatness threshold, the target cavity and the target battery are simultaneously subjected to pressure relief processing.

[0008] In combination with the first aspect, in one embodiment, the sequentially performing pressure relief processing on the target cavity and the target battery includes: Acquiring a maximum distance between the target ranging sensor and the shell surface of the target battery based on the target ranging sensor; Controlling the target cavity to release pressure, and during the process of releasing pressure in the target cavity, detecting a real-time distance between the target cavity and the shell surface corresponding to the maximum distance based on a target ranging sensor to obtain a target distance; When it is detected that the difference between the target difference absolute value and the target flatness is less than or equal to a preset difference threshold, the target cavity is controlled to be in a non-depressurization state and the target battery is controlled to be depressurized, and the target difference absolute value is the absolute value of the difference between the maximum distance and the target distance.

[0009] In combination with the first aspect, in one embodiment, the sequentially performing pressure relief processing on the target battery and the target cavity includes: performing a difference calculation between the target flatness and the first flatness threshold to obtain a first flatness difference; Determining a first pressure relief pressure value corresponding to the first flatness difference from a preset mapping relationship between a first flatness difference range and pressure relief pressure values; The target battery and the target cavity are pressure-relieved in sequence based on the first pressure-relief value.

[0010] In combination with the first aspect, in one embodiment, the step of sequentially performing pressure relief processing on the target battery and the target cavity based on the first pressure relief pressure value includes: controlling the target battery to release pressure, and placing the target battery in a non-pressure-releasing state when the pressure in the target battery reaches the first pressure-releasing pressure value; The target cavity is controlled to release pressure until the pressure in the target cavity reaches the first pressure relief pressure value, so that the target cavity is in a non-pressure relief state.

[0011] In combination with the first aspect, in one embodiment, the sequentially performing pressure relief processing on the target battery and the target cavity includes: Acquiring a maximum distance between the target ranging sensor and the shell surface of the target battery based on the target ranging sensor; Controlling the target battery to release pressure, and during the process of the target battery releasing pressure, detecting a real-time distance between the target battery and the shell surface corresponding to the maximum distance based on a target ranging sensor to obtain a target distance; When it is detected that the difference between the target absolute value of the difference and the target flatness is less than or equal to a preset difference threshold, the target battery is controlled to be in a non-depressurization state and the target cavity is controlled to be depressurized, and the target absolute value of the difference is the absolute value of the difference between the maximum distance and the target distance.

[0012] In a second aspect, an embodiment of the present application provides a battery flatness control device based on pre-helium inspection, the battery flatness control device comprising: A flatness detection module is used to perform flatness detection on a target battery to obtain a target flatness; an airtightness detection module, which is used to control the target battery to enter the target cavity and simultaneously perform a vacuum process on the target battery and the target cavity; after the vacuum process is completed, perform an airtightness test on the target battery; The flatness control module is used to control the pressure relief sequence of the target battery and the target cavity according to the size relationship between the target flatness and a preset flatness threshold after the airtightness test is completed, so as to achieve battery flatness control.

[0013] In conjunction with the second aspect, in one embodiment, the flatness threshold includes a first flatness threshold and a second flatness threshold, and the second flatness threshold is greater than the first flatness threshold. The flatness control module is specifically configured to: When it is detected that the target flatness is less than or equal to the first flatness threshold, performing pressure relief processing on the target battery and the target cavity in sequence; When it is detected that the target flatness is greater than the first flatness threshold, the pressure relief sequence of the target cavity and the target battery is controlled based on a magnitude relationship between the target flatness and the second flatness threshold.

[0014] In conjunction with the second aspect, in one embodiment, the flatness control module is further configured to: When it is detected that the target flatness is greater than or equal to the second flatness threshold, performing pressure relief processing on the target cavity and the target battery in sequence; When it is detected that the target flatness is less than the second flatness threshold, the target cavity and the target battery are simultaneously subjected to pressure relief processing.

[0015] In conjunction with the second aspect, in one embodiment, the flatness control module is further configured to: Acquiring a maximum distance between the target ranging sensor and the shell surface of the target battery based on the target ranging sensor; Controlling the target cavity to release pressure, and during the process of releasing pressure in the target cavity, detecting a real-time distance between the target cavity and the shell surface corresponding to the maximum distance based on a target ranging sensor to obtain a target distance; When it is detected that the difference between the target difference absolute value and the target flatness is less than or equal to a preset difference threshold, the target cavity is controlled to be in a non-depressurization state and the target battery is controlled to be depressurized, and the target difference absolute value is the absolute value of the difference between the maximum distance and the target distance.

[0016] In conjunction with the second aspect, in one embodiment, the flatness control module is further configured to: performing a difference calculation between the target flatness and the first flatness threshold to obtain a first flatness difference; Determining a first pressure relief pressure value corresponding to the first flatness difference from a preset mapping relationship between a first flatness difference range and pressure relief pressure values; The target battery and the target cavity are pressure-relieved in sequence based on the first pressure-relief value.

[0017] In conjunction with the second aspect, in one embodiment, the flatness control module is further configured to: controlling the target battery to release pressure, and placing the target battery in a non-pressure-releasing state when the pressure in the target battery reaches the first pressure-releasing pressure value; The target cavity is controlled to release pressure until the pressure in the target cavity reaches the first pressure relief pressure value, so that the target cavity is in a non-pressure relief state.

[0018] In conjunction with the second aspect, in one embodiment, the flatness control module is further configured to: Acquiring a maximum distance between the target ranging sensor and the shell surface of the target battery based on the target ranging sensor; Controlling the target battery to release pressure, and during the process of the target battery releasing pressure, detecting a real-time distance between the target battery and the shell surface corresponding to the maximum distance based on a target ranging sensor to obtain a target distance; When it is detected that the difference between the target absolute value of the difference and the target flatness is less than or equal to a preset difference threshold, the target battery is controlled to be in a non-depressurization state and the target cavity is controlled to be depressurized, and the target absolute value of the difference is the absolute value of the difference between the maximum distance and the target distance.

[0019] In a third aspect, an embodiment of the present application provides a battery flatness control device based on pre-helium inspection, wherein the battery flatness control device based on pre-helium inspection includes a processor, a memory, and a battery flatness control program based on pre-helium inspection stored on the memory and executable by the processor, wherein when the battery flatness control program based on pre-helium inspection is executed by the processor, the steps of the battery flatness control method based on pre-helium inspection as described above are implemented.

[0020] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, on which is stored a battery flatness control program based on pre-helium inspection. When the battery flatness control program based on pre-helium inspection is executed by a processor, the steps of the aforementioned battery flatness control method based on pre-helium inspection are implemented.

[0021] The beneficial effects of the technical solutions provided in the embodiments of the present application include: The target flatness is obtained by performing a flatness test on the target battery, so as to evaluate whether the flatness state of the battery is good; the target battery is controlled to enter the target cavity, and the target battery and the target cavity are vacuumed at the same time; after the vacuuming process is completed, the target battery is tested for air tightness; after the air tightness test is completed, whether the target battery is in a concave, swollen, etc. state is characterized according to the size relationship between the target flatness and a preset flatness threshold, so as to control the pressure release sequence of the target battery and the target cavity, and then change the flatness state of the target battery, thereby effectively improving the battery flatness and ensuring battery performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a flow chart of an embodiment of a battery flatness control method based on pre-helium inspection of the present application; Figure 2 This is a schematic diagram of the overall process of battery flatness control based on pre-helium inspection involved in the embodiment of the present application; Figure 3 For this application Figure 1 Detailed flow chart of step S20; Figure 4This is a functional module diagram of an embodiment of a battery flatness control device based on pre-helium inspection of the present application; Figure 5 This is a schematic diagram of the hardware structure of the battery flatness control device based on pre-helium inspection involved in the embodiment of the present application. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 this application.

[0024] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0025] In a first aspect, an embodiment of the present application provides a battery planarity control method based on pre-helium inspection.

[0026] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of an embodiment of a battery flatness control method based on pre-helium inspection in this application. Figure 1 As shown, the battery flatness control method based on pre-helium inspection includes: Step S10: performing a flatness test on the target battery to obtain a target flatness.

[0027] For example, it should be understood that for a battery assembled from a housing and cells, if its flatness (which can be large-surface flatness or other flatness, and is not limited here) does not meet the requirements, such as if the battery has a concave problem, traditional methods will be unable to adjust and control its flatness. In addition, after the battery is assembled, it is necessary to perform a pre-helium inspection on the battery to determine whether the battery has a leakage problem. After the helium inspection is completed, the battery and the cavity in which it is located need to be depressurized to achieve the purpose of breaking the vacuum. Among them, for all batteries, the traditional vacuum breaking logic is to first break the cavity and then the battery. At this time, if the battery's flatness is concave, then using this vacuum breaking logic to break the vacuum of the cavity and battery will cause the battery to be further concave due to the effect of pressure, making it unable to meet the flatness requirements. To solve the problem of battery concave, this embodiment will adjust the vacuum breaking logic according to the battery's flatness state to improve the battery's flatness, thereby ensuring battery performance.

[0028] It should be noted that the target battery in this embodiment refers to the battery that needs to undergo pre-helium inspection. Figure 2 As shown, the target battery is first scanned and the battery number, model and other information are recorded to facilitate subsequent tracking and management of the target battery and ensure the accuracy and traceability of the detection data; then, the target battery is subjected to a flatness detection before entering the cavity to obtain a target flatness corresponding to the target battery, which can be used to evaluate whether the flatness of the battery is good, such as whether the battery has problems such as dents and bulges; it is worth noting that the flatness detection of the target battery can be achieved by a line laser detection device or other devices capable of flatness detection, and since the method and principle of flatness detection are common knowledge in the field, they will not be repeated here for the sake of brevity.

[0029] Step S20: controlling the target battery to enter the target cavity, and simultaneously performing a vacuum process on the target battery and the target cavity.

[0030] For example, in this embodiment, after completing the flatness detection of the target battery, refer to Figure 2 As shown, the target battery must be placed in the target cavity, which is then closed to provide a closed environment for subsequent vacuuming, helium injection, and helium testing. The target cavity and target battery are then simultaneously vacuumed to remove air from the target cavity and target battery, preventing impurities in the air from interfering with the test results. It should be noted that the vacuuming methods and principles involved in the pre-helium testing process are common knowledge in the field, and therefore, for the sake of brevity, they will not be detailed here.

[0031] Step S30: After the vacuuming process is completed, the target battery is subjected to an airtightness test.

[0032] For example, in this embodiment, after the vacuum treatment is completed, the target battery will be subjected to an airtightness test; for details, see Figure 2 As shown, helium is first injected into the target battery, allowing it to diffuse fully into the interior of the target battery and serve as a tracer gas for leak detection. The helium content within the target cavity is then tested, and the detected helium concentration is used to determine whether the target battery is leaking, thus completing the pre-helium inspection of the target battery. It should be noted that the implementation methods and principles of the relevant steps and actions involved in the pre-helium inspection process (such as helium injection and helium detection) are common knowledge in the field and will not be detailed here for the sake of brevity.

[0033] Step S40: After the airtightness test is completed, the pressure relief sequence of the target battery and the target cavity is controlled according to the size relationship between the target flatness and a preset flatness threshold, so as to achieve control of the battery flatness.

[0034] Exemplarily, in this embodiment, after completing the pre-helium inspection of the target battery, the flatness state will be further determined based on the target flatness size of the target battery, so as to adjust the vacuum breaking logic of the target battery and the target cavity according to the flatness state, thereby achieving the purpose of improving the battery flatness. It is worth noting that in this embodiment, different critical values ​​will be set for the presence of battery depression problems and bulging problems, respectively, and the two critical values ​​will be used as flatness thresholds, so as to judge whether the target battery is in a depressed, swollen, etc. state through the size relationship between the target flatness and the flatness threshold. Based on this, different pressure relief sequences are set for the target battery and the target cavity, so as to change the flatness state of the target battery through different pressure relief sequences, thereby effectively improving the battery flatness and ensuring battery performance. It should be noted that the specific value setting of the flatness threshold can be determined according to actual needs, or it can be calibrated through experiments, which is not limited here.

[0035] Furthermore, in one embodiment, the flatness threshold includes a first flatness threshold and a second flatness threshold, and the second flatness threshold is greater than the first flatness threshold, see Figure 3 As shown, the pressure relief sequence of the target battery and the target cavity is controlled according to the magnitude relationship between the target flatness and a preset flatness threshold, including: Step S401: When it is detected that the target flatness is less than or equal to the first flatness threshold, pressure relief processing is performed on the target battery and the target cavity in sequence; Step S402: When it is detected that the target flatness is greater than the first flatness threshold, the pressure relief sequence of the target cavity and the target battery is controlled based on the magnitude relationship between the target flatness and the second flatness threshold.

[0036] For example, in this embodiment, the first flatness threshold A is used as the critical value for the battery to have a dent problem, and the second flatness threshold B is used as the critical value for the battery to have a bulge problem. The specific value settings of the two can be determined according to actual needs, or can be calibrated through experiments. There is no limitation here, as long as the second flatness threshold B is greater than the first flatness threshold A.

[0037] See also Figure 2As shown, if the target flatness of the target battery is ≤ the first flatness threshold A, it means that the flatness state of the target battery is a concave problem, and the vacuum breaking logic of the target battery and the target cavity needs to be adjusted, that is, the target battery is first pressure-relieved (the target cavity is in a vacuum state at this time) so that the internal and external pressure difference of the shell of the target battery is reduced, so that the shell expands outward, and then the flatness state of the target battery is improved, that is, the degree of concave of the target battery is reduced to ensure the battery performance; then the target cavity is pressure-relieved to achieve vacuum breaking of the target cavity, and finally the target cavity is opened and the target battery is removed from it, thereby effectively controlling the consistency of the battery flatness.

[0038] If the target flatness of the target battery is greater than the first flatness threshold A, it means that the flatness state of the target battery does not have a depression problem. Then it is necessary to continue to determine whether the flatness state of the target battery is normal or there is a bulging problem based on the size relationship between the target flatness and the second flatness threshold B. Based on this, the pressure relief sequence of the target cavity and the target battery is controlled to achieve the purpose of improving the battery flatness.

[0039] It should be noted that before determining the flatness state according to the target flatness size of the target battery, it is also possible to first determine whether the previous helium inspection result is a leak. If not, continue to determine the flatness state according to the target flatness size of the target battery; if so, it means that the target battery is an unqualified battery, and it will be meaningless to adjust its flatness. Therefore, there is no need to adjust the flatness of the target battery. Therefore, there is no need to limit the order of breaking the vacuum of the target battery and the target cavity, and it can be determined according to actual needs.

[0040] Furthermore, in one embodiment, controlling the pressure relief sequence of the target cavity and the target battery based on the magnitude relationship between the target flatness and the second flatness threshold includes: When it is detected that the target flatness is greater than or equal to the second flatness threshold, performing pressure relief processing on the target cavity and the target battery in sequence; When it is detected that the target flatness is less than the second flatness threshold, the target cavity and the target battery are simultaneously subjected to pressure relief processing.

[0041] For example, see Figure 2As shown, if the target flatness of the target battery is ≥ the second flatness threshold B, it means that the flatness state of the target battery is that there is a bulging problem, and the vacuum breaking logic of the target battery and the target cavity needs to be adjusted, that is, the target cavity is first pressure-relieved (the target battery is in a vacuum state at this time) so that the internal and external pressure difference of the shell of the target battery increases, so that the shell is compressed inward, and then the flatness state of the target battery is improved, that is, the bulging degree of the target battery is reduced to ensure the battery performance; then the target battery is pressure-relieved to achieve vacuum breaking of the target battery, and finally the target cavity is opened and the target battery is removed from it.

[0042] If it is detected that the first flatness threshold A is less than the target flatness and less than the second flatness threshold B, it means that the flatness of the target battery meets the standard, that is, the target battery has neither a dent problem nor a bulging problem. At this time, the target cavity and the target battery can be directly controlled to perform pressure relief treatment at the same time to ensure that the flatness of the target battery is still in a standard state.

[0043] Furthermore, in one embodiment, the step of sequentially performing pressure relief on the target cavity and the target battery includes: performing a difference calculation between the target flatness and the second flatness threshold to obtain a second flatness difference; Determining a second pressure relief pressure value corresponding to the second flatness difference from a preset mapping relationship between a second flatness difference range and pressure relief pressure values; The target cavity and the target battery are pressure-relieved in sequence based on the second pressure-relief value.

[0044] For example, in this embodiment, in order to improve the accuracy of the battery flatness adjustment result, preliminary experiments are conducted on batteries with different degrees of swelling to determine the pressure value (i.e., the pressure relief pressure value) that the internal pressure of the batteries with different degrees of swelling needs to reach when the flatness of the batteries meets the standard. That is, when the pressure inside the battery reaches the pressure relief pressure value, it is said that the battery flatness has met the standard. For example, a preliminary experiment is conducted on a battery G with a swelling problem, a flatness of E, and a flatness difference of F between E and a second flatness threshold B. That is, the pressure of the battery G is relieved. When the internal pressure of the battery G is detected to be H, the battery G no longer has the swelling problem, that is, the battery G is If the flatness of G has met the standard, then H is the pressure relief value in the inflated state, and thus a mapping relationship between F and H is constructed; however, since it is relatively difficult to determine the pressure relief pressure values ​​corresponding to all flatness differences through preliminary experiments, the flatness differences can be ranged to determine the pressure relief pressure values ​​corresponding to different flatness difference ranges; for example, by expanding F by ±D, the flatness difference range (FD, F+D) can be obtained, and then a mapping relationship between (FF, Y+D) and H can be constructed, and so on, until the construction of the mapping relationship between all flatness difference ranges in the inflated state and their corresponding pressure relief pressure values ​​is completed.

[0045] Therefore, when determining that the target battery has a bulging problem, the difference between the target flatness of the target battery and the second flatness threshold can be calculated first to obtain the second flatness difference; then the flatness difference range within which the second flatness difference lies is determined, and then the second pressure relief pressure value is determined based on the mapping relationship between the flatness difference range and the pressure relief pressure value; finally, the target cavity and the target battery are pressure-relieved in turn according to the second pressure relief pressure value, so that the flatness of the target battery meets the standard.

[0046] Furthermore, in one embodiment, the step of sequentially performing pressure relief processing on the target cavity and the target battery based on the second pressure relief pressure value includes: controlling the target cavity to release pressure, and placing the target cavity in a non-pressure-releasing state when the pressure in the target cavity reaches the second pressure-releasing pressure value; The target battery is controlled to release pressure until the pressure in the target battery reaches the second pressure relief pressure value, so that the target battery is in a non-pressure relief state.

[0047] Exemplarily, in this embodiment, after determining the second pressure relief pressure value, the target cavity is controlled to be pressure-relieved until it is detected that the pressure in the target cavity reaches the second pressure relief pressure value, indicating that the flatness of the target battery has met the standard and it no longer has a bulging problem. At this time, the pressure relief of the target cavity is stopped; then the target battery is pressure-relieved until it is detected that the pressure in the target battery also reaches the second pressure relief pressure value, that is, there is no pressure difference between the target battery and the target cavity. At this time, the pressure relief of the target battery is stopped, and the target cavity is opened to take out the target battery whose flatness has met the standard.

[0048] Furthermore, in one embodiment, the step of sequentially performing pressure relief on the target cavity and the target battery includes: Acquiring a maximum distance between the target ranging sensor and the shell surface of the target battery based on the target ranging sensor; Controlling the target cavity to release pressure, and during the process of releasing pressure in the target cavity, detecting a real-time distance between the target cavity and the shell surface corresponding to the maximum distance based on a target ranging sensor to obtain a target distance; When it is detected that the difference between the target difference absolute value and the target flatness is less than or equal to a preset difference threshold, the target cavity is controlled to be in a non-depressurization state and the target battery is controlled to be depressurized, and the target difference absolute value is the absolute value of the difference between the maximum distance and the target distance.

[0049] For example, in this embodiment, during the vacuum breaking process, when the flatness of the target battery shell meets the requirements under the action of the pressure difference, the pressure difference between the inside and outside of the battery shell will be balanced in a timely manner (that is, the side that still maintains the vacuum will start the vacuum breaking process); based on this, a sensor for ranging (that is, a target ranging sensor, which can be a laser ranging sensor, an infrared ranging sensor, or other types of distance sensors, which are not limited here) can be added to the target cavity to determine whether the flatness of the target battery shell under the action of the pressure difference meets the requirements through the ranging results of the target ranging sensor, and then decide whether to end the flatness adjustment.

[0050] Specifically, when the target battery is just placed in the target cavity, the target ranging sensor detects the maximum distance between the target battery and the shell surface of the target battery. It is worth noting that this maximum distance represents the maximum degree of bulging of the target battery. The target cavity is then controlled to depressurize. During the depressurization process, i.e., when the pressure differential environment changes, the target ranging sensor continues to detect the real-time distance between the target battery and the shell surface corresponding to the maximum distance. This real-time distance is used as the target distance to represent the degree of bulging of the target battery after the pressure relief process in the target cavity. A target absolute value of the difference between the maximum distance and the target distance is then calculated. Based on the target absolute value of the difference, whether the bulging problem of the target battery has been resolved is indicated. If the target absolute value of the difference is very small, i.e., within an acceptable range, i.e., the difference between the target absolute value of the difference and the target flatness is less than or equal to a difference threshold, the bulging problem of the target battery has been resolved and no further flatness adjustment is required. The target cavity is then controlled to be in a non-depressurized state, and the target battery, which is still in a vacuum state, is controlled to begin depressurization.

[0051] However, if the absolute value of the target difference is large, that is, within an unacceptable range, that is, the difference between the absolute value of the target difference and the target flatness is greater than the difference threshold, it means that the bulging problem of the target battery has not been solved, and the bulging problem still exists, and the flatness needs to be further adjusted. The target cavity is controlled to continue to be in a pressure relief state until the difference between the absolute value of the target difference and the target flatness is no greater than the difference threshold, then the target cavity is controlled to be in a non-pressure relief state and the target battery, which is still in a vacuum state, is controlled to start pressure relief.

[0052] Furthermore, the step of sequentially performing pressure relief processing on the target battery and the target cavity includes: performing a difference calculation between the target flatness and the first flatness threshold to obtain a first flatness difference; Determining a first pressure relief pressure value corresponding to the first flatness difference from a preset mapping relationship between a first flatness difference range and pressure relief pressure values; The target battery and the target cavity are pressure-relieved in sequence based on the first pressure-relief value.

[0053] For example, in this embodiment, in order to improve the accuracy of the adjustment result of the battery flatness, a preliminary experiment is conducted on batteries with different degrees of concavity to determine the pressure value (i.e., the pressure relief pressure value) that the internal pressure of the batteries with different degrees of concavity needs to reach when the flatness meets the standard. That is, when the pressure inside the battery reaches the pressure relief pressure value, it is indicated that the battery flatness has met the standard. For example, a preliminary experiment is conducted on a battery C with a concavity problem, a flatness of X, and a flatness difference of Y between X and a first flatness threshold A. That is, the pressure of the battery C is relieved. When the internal pressure of the battery C is detected to be Z, the battery C no longer has the concavity problem, that is, the battery C is If the flatness of C has met the standard, then Z is the pressure relief value in the concave state, and thus a mapping relationship between Y and Z is constructed; however, since it is relatively difficult to determine the pressure relief pressure values ​​corresponding to all flatness differences through preliminary experiments, the flatness differences can be ranged to determine the pressure relief pressure values ​​corresponding to different flatness difference ranges; for example, by expanding Y by ±D, the flatness difference range (YD, Y+D) can be obtained, and then a mapping relationship between (YD, Y+D) and Z can be constructed, and so on, until the construction of the mapping relationship between the flatness difference ranges in all concave states and their corresponding pressure relief pressure values ​​is completed.

[0054] Therefore, when determining that the target battery has a dent problem, the difference between the target flatness of the target battery and the first flatness threshold can be calculated first to obtain the first flatness difference; then the flatness difference range within which the first flatness difference is located is determined, and then the first pressure relief pressure value is determined based on the mapping relationship between the flatness difference range and the pressure relief pressure value; finally, the target battery and the target cavity are pressure-relieved in turn according to the first pressure relief pressure value, so that the flatness of the target battery meets the standard.

[0055] Furthermore, in one embodiment, the step of sequentially performing pressure relief processing on the target battery and the target cavity based on the first pressure relief pressure value includes: controlling the target battery to release pressure, and placing the target battery in a non-pressure-releasing state when the pressure in the target battery reaches the first pressure-releasing pressure value; The target cavity is controlled to release pressure until the pressure in the target cavity reaches the first pressure relief pressure value, so that the target cavity is in a non-pressure relief state.

[0056] Exemplarily, in this embodiment, after determining the first pressure relief pressure value, the target battery will be controlled to release pressure until it is detected that the pressure inside the target battery reaches the first pressure relief pressure value, indicating that the flatness of the target battery has met the standard and it no longer has the problem of depression. At this time, the pressure relief of the target battery is stopped; then the target cavity is pressure-relieved until it is detected that the pressure inside the target cavity also reaches the first pressure relief pressure value, that is, there is no pressure difference between the target battery and the target cavity. At this time, the pressure relief of the target cavity is stopped, and the target cavity is opened to take out the target battery whose flatness meets the standard.

[0057] Furthermore, in one embodiment, the step of sequentially performing pressure relief on the target battery and the target cavity includes: Acquiring a maximum distance between the target ranging sensor and the shell surface of the target battery based on the target ranging sensor; Controlling the target battery to release pressure, and during the process of the target battery releasing pressure, detecting a real-time distance between the target battery and the shell surface corresponding to the maximum distance based on a target ranging sensor to obtain a target distance; When it is detected that the difference between the target absolute value of the difference and the target flatness is less than or equal to a preset difference threshold, the target battery is controlled to be in a non-depressurization state and the target cavity is controlled to be depressurized, and the target absolute value of the difference is the absolute value of the difference between the maximum distance and the target distance.

[0058] For example, in this embodiment, during the vacuum breaking process, when the flatness of the target battery shell meets the requirements under the action of the pressure difference, the pressure difference between the inside and outside of the battery shell will be balanced in a timely manner (that is, the side that still maintains the vacuum will start the vacuum breaking process); based on this, a sensor for ranging (that is, a target ranging sensor, which can be a laser ranging sensor, an infrared ranging sensor, or other types of distance sensors, which are not limited here) can be added to the target cavity to determine whether the flatness of the target battery shell under the action of the pressure difference meets the requirements through the ranging results of the target ranging sensor, and then decide whether to end the flatness adjustment.

[0059] Specifically, when the target battery is just placed in the target cavity, the target ranging sensor detects the maximum distance between the target battery and the shell surface of the target battery. It is worth noting that this maximum distance represents the maximum degree of depression of the target battery. The target battery is then controlled to release pressure. During the target battery pressure release process, that is, when the pressure differential environment changes, the target ranging sensor continues to detect the real-time distance between the target battery and the shell surface corresponding to the maximum distance. This real-time distance is used as the target distance to represent the degree of depression of the target battery after the pressure release process. The target absolute value of the difference between the maximum distance and the target distance is then calculated. Based on the target absolute value of the difference, it is indicated whether the depression problem of the target battery has been solved. If the target absolute value of the difference is very small, that is, within an acceptable range, that is, the difference between the target absolute value of the difference and the target flatness is less than or equal to the difference threshold, it indicates that the depression problem of the target battery has been solved and no further flatness adjustment is required. The target battery is then controlled to be in a non-depressurized state, and the target cavity, which is still in a vacuum state, is controlled to begin depressurization. It should be noted that the specific value of the difference threshold can be determined based on experimental calibration or actual needs, and is not limited here.

[0060] However, if the absolute value of the target difference is large, that is, within an unacceptable range, that is, the difference between the absolute value of the target difference and the target flatness is greater than the difference threshold, it means that the depression problem of the target battery has not been solved, and the depression problem still exists, and the flatness needs to be further adjusted. The target battery is controlled to continue to be in a pressure relief state until the difference between the absolute value of the target difference and the target flatness is no greater than the difference threshold, then the target battery is controlled to be in a non-pressure relief state and the target cavity, which is still in a vacuum state, is controlled to start pressure relief.

[0061] In a second aspect, an embodiment of the present application also provides a battery flatness control device based on pre-helium inspection.

[0062] In one embodiment, referring to Figure 4 , Figure 4 This is a functional module diagram of an embodiment of a battery flatness control device based on pre-helium inspection in this application. Figure 4 As shown, the battery flatness control device based on front helium inspection includes: A flatness detection module is used to perform flatness detection on a target battery to obtain a target flatness; an airtightness detection module, which is used to control the target battery to enter the target cavity and simultaneously perform a vacuum process on the target battery and the target cavity; after the vacuum process is completed, perform an airtightness test on the target battery; The flatness control module is used to control the pressure relief sequence of the target battery and the target cavity according to the size relationship between the target flatness and a preset flatness threshold after the airtightness test is completed, so as to achieve battery flatness control.

[0063] Furthermore, in one embodiment, the flatness threshold includes a first flatness threshold and a second flatness threshold, and the second flatness threshold is greater than the first flatness threshold, and the flatness control module is specifically configured to: When it is detected that the target flatness is less than or equal to the first flatness threshold, performing pressure relief processing on the target battery and the target cavity in sequence; When it is detected that the target flatness is greater than the first flatness threshold, the pressure relief sequence of the target cavity and the target battery is controlled based on a magnitude relationship between the target flatness and the second flatness threshold.

[0064] Furthermore, in one embodiment, the flatness control module is further configured to: When it is detected that the target flatness is greater than or equal to the second flatness threshold, performing pressure relief processing on the target cavity and the target battery in sequence; When it is detected that the target flatness is less than the second flatness threshold, the target cavity and the target battery are simultaneously subjected to pressure relief processing.

[0065] Furthermore, in one embodiment, the flatness control module is further configured to: Acquiring a maximum distance between the target ranging sensor and the shell surface of the target battery based on the target ranging sensor; Controlling the target cavity to release pressure, and during the process of releasing pressure in the target cavity, detecting a real-time distance between the target cavity and the shell surface corresponding to the maximum distance based on a target ranging sensor to obtain a target distance; When it is detected that the difference between the target difference absolute value and the target flatness is less than or equal to a preset difference threshold, the target cavity is controlled to be in a non-depressurization state and the target battery is controlled to be depressurized, and the target difference absolute value is the absolute value of the difference between the maximum distance and the target distance.

[0066] Furthermore, in one embodiment, the flatness control module is further configured to: performing a difference calculation between the target flatness and the first flatness threshold to obtain a first flatness difference; Determining a first pressure relief pressure value corresponding to the first flatness difference from a preset mapping relationship between a first flatness difference range and pressure relief pressure values; The target battery and the target cavity are pressure-relieved in sequence based on the first pressure-relief value.

[0067] Furthermore, in one embodiment, the flatness control module is further configured to: controlling the target battery to release pressure, and placing the target battery in a non-pressure-releasing state when the pressure in the target battery reaches the first pressure-releasing pressure value; The target cavity is controlled to release pressure until the pressure in the target cavity reaches the first pressure relief pressure value, so that the target cavity is in a non-pressure relief state.

[0068] Furthermore, in one embodiment, the flatness control module is further configured to: Acquiring a maximum distance between the target ranging sensor and the shell surface of the target battery based on the target ranging sensor; Controlling the target battery to release pressure, and during the process of the target battery releasing pressure, detecting a real-time distance between the target battery and the shell surface corresponding to the maximum distance based on a target ranging sensor to obtain a target distance; When it is detected that the difference between the target absolute value of the difference and the target flatness is less than or equal to a preset difference threshold, the target battery is controlled to be in a non-depressurization state and the target cavity is controlled to be depressurized, and the target absolute value of the difference is the absolute value of the difference between the maximum distance and the target distance.

[0069] Among them, the functional implementation of each module in the above-mentioned battery flatness control device based on pre-helium inspection corresponds to the various steps in the above-mentioned battery flatness control method embodiment based on pre-helium inspection, and their functions and implementation processes are no longer repeated here.

[0070] In a third aspect, an embodiment of the present application provides a battery flatness control device based on pre-helium inspection. The battery flatness control device based on pre-helium inspection can be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0071] Reference Figure 5 , Figure 5 Schematic diagram of the hardware structure of the battery flatness control device based on pre-helium inspection involved in the embodiment of the present application. In the embodiment of the present application, the battery flatness control device based on pre-helium inspection may include a processor, a memory, a communication interface, and a communication bus.

[0072] The communication bus may be of any type and is used to interconnect the processor, memory, and communication interface.

[0073] Communication interfaces include input / output (I / O), physical, and logical interfaces, which interconnect components within the pre-helium-based battery flatness control device and other devices (such as other computing devices or user devices). Physical interfaces can include Ethernet, fiber optic, and ATM interfaces; user devices can include displays and keyboards.

[0074] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0075] The processor may be a general-purpose processor that can invoke a pre-helium inspection-based battery flatness control program stored in a memory and execute the pre-helium inspection-based battery flatness control method provided in the embodiments of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The methods executed when the pre-helium inspection-based battery flatness control program is invoked can be found in the various embodiments of the pre-helium inspection-based battery flatness control method of the present application and will not be further described here.

[0076] Those skilled in the art will understand that Figure 5 The hardware structure shown in the figure does not constitute a limitation to the present application and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0077] In a fourth aspect, an embodiment of the present application also provides a computer-readable storage medium.

[0078] The readable storage medium of the present application stores a battery flatness control program based on pre-helium inspection, wherein when the battery flatness control program based on pre-helium inspection is executed by a processor, the steps of the battery flatness control method based on pre-helium inspection as described above are implemented.

[0079] Among them, the method implemented when the battery flatness control program based on pre-helium inspection is executed can refer to the various embodiments of the battery flatness control method based on pre-helium inspection in this application, and will not be repeated here.

[0080] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit the "first", "second" and "third" to different types.

[0081] In the description of the embodiments of this application, the words "exemplary," "for example," or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary," "for example," or "for example" in the embodiments of this application should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary," "for example," or "for example" is intended to present the relevant concepts in a concrete manner.

[0082] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0083] In some processes described in the embodiments of the present application, multiple operations or steps are included that appear in a specific order. However, it should be understood that these operations or steps may not be performed in the order in which they appear in the embodiments of the present application or may be performed in parallel. The sequence numbers of the operations are only used to distinguish between different operations, and the sequence numbers themselves do not represent any order of execution. In addition, these processes may include more or fewer operations, and these operations or steps may be performed in sequence or in parallel, and these operations or steps may be combined.

[0084] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, or the part that contributes to the existing technology, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above and includes a number of instructions for enabling a terminal device to execute the methods described in each embodiment of this application.

[0085] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A battery flatness control method based on pre-helium inspection, characterized in that: The battery flatness control method includes: Performing a flatness test on a target battery to obtain a target flatness; controlling the target battery to enter a target cavity, and simultaneously performing a vacuum process on the target battery and the target cavity; After the vacuum treatment is completed, performing an air tightness test on the target battery; After the airtightness test is completed, the pressure relief sequence of the target battery and the target cavity is controlled according to the magnitude relationship between the target flatness and a preset flatness threshold, so as to achieve control of the battery flatness.

2. The battery flatness control method based on pre-helium inspection according to claim 1, characterized in that: The flatness threshold includes a first flatness threshold and a second flatness threshold, and the second flatness threshold is greater than the first flatness threshold. The controlling the pressure relief sequence of the target battery and the target cavity according to the magnitude relationship between the target flatness and the preset flatness threshold includes: When it is detected that the target flatness is less than or equal to the first flatness threshold, performing pressure relief processing on the target battery and the target cavity in sequence; When it is detected that the target flatness is greater than the first flatness threshold, the pressure relief sequence of the target cavity and the target battery is controlled based on a magnitude relationship between the target flatness and the second flatness threshold.

3. The battery flatness control method based on pre-helium inspection according to claim 2, characterized in that: The controlling the pressure relief sequence of the target cavity and the target battery based on the magnitude relationship between the target flatness and the second flatness threshold includes: When it is detected that the target flatness is greater than or equal to the second flatness threshold, performing pressure relief processing on the target cavity and the target battery in sequence; When it is detected that the target flatness is less than the second flatness threshold, the target cavity and the target battery are simultaneously subjected to pressure relief processing.

4. The battery flatness control method based on pre-helium inspection according to claim 3, characterized in that: The step of sequentially performing pressure relief processing on the target cavity and the target battery includes: Acquiring a maximum distance between the target ranging sensor and the shell surface of the target battery based on the target ranging sensor; Controlling the target cavity to release pressure, and during the process of releasing pressure in the target cavity, detecting a real-time distance between the target cavity and the shell surface corresponding to the maximum distance based on a target ranging sensor to obtain a target distance; When it is detected that the difference between the target difference absolute value and the target flatness is less than or equal to a preset difference threshold, the target cavity is controlled to be in a non-depressurization state and the target battery is controlled to be depressurized, and the target difference absolute value is the absolute value of the difference between the maximum distance and the target distance.

5. The battery flatness control method based on pre-helium inspection according to claim 2, characterized in that: The step of sequentially performing pressure relief processing on the target battery and the target cavity includes: performing a difference calculation between the target flatness and the first flatness threshold to obtain a first flatness difference; Determining a first pressure relief pressure value corresponding to the first flatness difference from a preset mapping relationship between a first flatness difference range and pressure relief pressure values; The target battery and the target cavity are pressure-relieved in sequence based on the first pressure-relief value.

6. The battery flatness control method based on pre-helium inspection according to claim 5, characterized in that: The performing pressure relief processing on the target battery and the target cavity in sequence based on the first pressure relief pressure value includes: controlling the target battery to release pressure, and placing the target battery in a non-pressure-releasing state when the pressure in the target battery reaches the first pressure-releasing pressure value; The target cavity is controlled to release pressure until the pressure in the target cavity reaches the first pressure relief pressure value, so that the target cavity is in a non-pressure relief state.

7. The battery flatness control method based on pre-helium inspection according to claim 2, characterized in that: The step of sequentially performing pressure relief processing on the target battery and the target cavity includes: Acquiring a maximum distance between the target ranging sensor and the shell surface of the target battery based on the target ranging sensor; Controlling the target battery to release pressure, and during the process of the target battery releasing pressure, detecting a real-time distance between the target battery and the shell surface corresponding to the maximum distance based on a target ranging sensor to obtain a target distance; When it is detected that the difference between the target absolute value of the difference and the target flatness is less than or equal to a preset difference threshold, the target battery is controlled to be in a non-depressurization state and the target cavity is controlled to be depressurized, and the target absolute value of the difference is the absolute value of the difference between the maximum distance and the target distance.

8. A battery flatness control device based on pre-helium inspection, characterized in that: The battery flatness control device comprises: A flatness detection module is used to perform flatness detection on a target battery to obtain a target flatness; an airtightness detection module, which is used to control the target battery to enter the target cavity and simultaneously perform a vacuum process on the target battery and the target cavity; after the vacuum process is completed, perform an airtightness test on the target battery; The flatness control module is used to control the pressure relief sequence of the target battery and the target cavity according to the size relationship between the target flatness and a preset flatness threshold after the airtightness test is completed, so as to achieve battery flatness control.

9. A battery flatness control device based on pre-helium inspection, characterized in that: The battery flatness control device based on pre-helium inspection includes a processor, a memory, and a battery flatness control program based on pre-helium inspection stored in the memory and executable by the processor, wherein when the battery flatness control program based on pre-helium inspection is executed by the processor, the steps of the battery flatness control method based on pre-helium inspection as described in any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a battery flatness control program based on pre-helium inspection, wherein when the battery flatness control program based on pre-helium inspection is executed by a processor, the steps of the battery flatness control method based on pre-helium inspection as described in any one of claims 1 to 7 are implemented.

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