Deviation correction system for liquid injection hole and anti-explosion valve, battery production line and battery

Abstract

The invention provides a correction system for a liquid injection hole and an anti-explosion valve, a battery production line and a battery, and belongs to the technical field of batteries. The liquid injection hole and anti-explosion valve deviation rectifying system comprises a measuring module and a deviation rectifying module. The measuring module is positioned on at least one side of the battery conveying line and is used for determining a deviation angle of a liquid injection hole and an anti-explosion valve on the battery to be tested; the deviation rectifying module is located on the downstream side of the measuring module and used for adjusting the position of the liquid injection hole and / or the anti-explosion valve so that the deviation angle of the liquid injection hole and the anti-explosion valve can meet the target angle. According to the liquid injection hole and anti-explosion valve deviation correction system, the measurement module is used for measuring the deviation angle of the liquid injection hole and the anti-explosion valve on the battery to be tested, the deviation correction module can adjust the position of the liquid injection hole and / or the anti-explosion valve according to the measurement result of the measurement module, and the deviation angle of the liquid injection hole and the anti-explosion valve is corrected; and the deviation angle of the liquid injection hole and the anti-explosion valve meets the target angle, so that the production precision and the yield of the battery are improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a liquid injection hole and explosion-proof valve correction system, a battery production line and a battery. Background Art

[0002] During the assembly process of cylindrical batteries, a large deviation angle between the injection hole and the explosion-proof valve may cause the explosion-proof valve to be blocked by the mounting bracket during the assembly of the battery cell module, making it impossible to open the valve normally to release pressure, resulting in a greater safety risk.

[0003] However, in the related art, there is no unified standard for the deviation angle between the injection hole and the explosion-proof valve. The deviation angle between the injection hole and the explosion-proof valve is usually arranged by controlling the welding angle of the positive and negative current collecting plates of the battery cell, which has problems of poor control accuracy and low yield. Summary of the invention

[0004] The present application provides a liquid injection hole and explosion-proof valve correction system, a battery production line and a battery, which can solve the problems of poor control accuracy and low yield of the deviation angle between the liquid injection hole and the explosion-proof valve in the related art.

[0005] The technical solution is as follows:

[0006] In one aspect, a correction system for a liquid injection hole and an explosion-proof valve is provided, the system comprising: a measurement module and a correction module;

[0007] The measuring module is located on at least one side of the battery conveyor line and is used to determine the deviation angle of the injection hole and the explosion-proof valve on the battery to be tested;

[0008] The deviation correction module is located at the downstream side of the measuring module, and is used to adjust the position of the liquid injection hole and / or the explosion-proof valve so that the deviation angle of the liquid injection hole and the explosion-proof valve meets the target angle.

[0009] In some embodiments, the measuring module includes at least one first image sensor and a control unit, the at least one first image sensor is electrically connected to the control unit, the at least one first image sensor is used to respectively capture images of the injection hole and the explosion-proof valve, and the control unit is used to determine the deviation angles of the injection hole and the explosion-proof valve.

[0010] In some embodiments, the battery to be tested includes a first battery cover and a second battery cover, the first battery cover and the second battery cover are respectively located at two axial ends of the battery to be tested, the injection hole is located on the first battery cover, and the explosion-proof valve is located on the second battery cover;

[0011] The number of the first image sensors is two, and the two first image sensors are respectively arranged at two axial ends of the battery to be tested, and are respectively used to capture images of the first battery cover plate and the second battery cover plate.

[0012] In some embodiments, the control unit is used to determine a first connecting line between the center of the first battery cover and the center of the injection hole, and determine a first angle between the first connecting line and a plumb line;

[0013] It is also used to determine a second connecting line between the center of the second battery cover plate and the center of the explosion-proof valve, and determine a second angle between the second connecting line and the plumb line;

[0014] The deviation angle between the liquid injection hole and the explosion-proof valve is determined according to the absolute value of the difference between the first angle and the second angle.

[0015] In some embodiments, the control unit is also used to compare the deviation angle and the target angle. When the deviation angle is less than or equal to the target angle, the control unit outputs a first instruction that does not require correction. When the deviation angle is greater than the target angle, the control unit outputs a second instruction that requires correction.

[0016] In some embodiments, the target angle ranges from 0 to 10 degrees.

[0017] In some embodiments, the deviation correction module includes a clamping mechanism and a rotating mechanism, and the clamping mechanism includes a base member, three movable clamping blocks and a pre-tightening push rod;

[0018] The three movable clamping blocks are arranged on the base member at intervals along the circumferential direction, the preload push rod is located between the three movable clamping blocks, and the base member is connected to the rotating mechanism.

[0019] In some embodiments, the correction module further includes a lifting mechanism and a feeding mechanism, the lifting mechanism is connected to the feeding mechanism, and the clamping mechanism is connected to the lifting mechanism.

[0020] On the other hand, a battery production line is provided, which includes the injection hole and explosion-proof valve correction system described in the present application.

[0021] On the other hand, a battery is provided, wherein the battery is processed using the battery production line described in the present application.

[0022] The beneficial effects of the technical solution provided by this application include at least:

[0023] The injection hole and explosion-proof valve correction system of the present application has a measuring module arranged on one side of the battery conveyor line, which can measure the deviation angle of the injection hole and the explosion-proof valve on the battery to be tested, and a correction module is arranged downstream of the measuring module. The correction module can adjust the position of the injection hole and / or the explosion-proof valve according to the measurement result of the measuring module, and correct the deviation angle of the injection hole and the explosion-proof valve, so that the deviation angle of the injection hole and the explosion-proof valve meets the target angle, thereby improving the production accuracy and yield of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a structural schematic diagram of the liquid injection hole and explosion-proof valve correction system provided in an embodiment of the present application;

[0026] Figure 2 is a structural schematic diagram of a battery to be tested and a measurement module provided in an embodiment of the present application;

[0027] Figure 3 This is a schematic diagram of the structure of the battery to be tested provided in the embodiment of the present application. Figure 1 ;

[0028] Figure 4 This is a schematic diagram of the structure of the battery to be tested provided in the embodiment of the present application. Figure 2 ;

[0029] Figure 5 is a structural schematic diagram of a first battery cover provided in an embodiment of the present application;

[0030] Figure 6 is a schematic structural diagram of a second battery cover provided in an embodiment of the present application;

[0031] Figure 7 is a structural schematic diagram of the deviation angle provided in an embodiment of the present application;

[0032] Figure 8 It is a structural schematic diagram of the correction module provided in an embodiment of the present application;

[0033] Fig. 9 is a structural schematic diagram of a correction module provided in another embodiment of the present application;

[0034] Fig.10 is a structural schematic diagram of a clamping mechanism provided in an embodiment of the present application;

[0035] Fig.11It is a schematic diagram of the structure of the detection module provided in the embodiment of the present application.

[0036] The reference numerals in the figures represent respectively:

[0037] 100. Battery to be tested;

[0038] 1001, a first battery cover; 1002, a second battery cover;

[0039] 100a, liquid injection hole; 100b, explosion-proof valve;

[0040] 001, first connecting center line; 002, second connecting center line; 003, plumb line;

[0041] 1. Measurement module;

[0042] 11. First image sensor; 12. Control unit; 13. Fill light;

[0043] 2. Correction module;

[0044] 21. Clamping mechanism; 211. Base member; 212. Movable clamping block; 213. Preload push rod; 22. Lifting mechanism; 23. Feeding mechanism; 231. First feeding mechanism; 232. Second feeding mechanism; 24. Pressing mechanism; 25. Rotating mechanism;

[0045] 3. Detection module;

[0046] 31. A second image sensor. DETAILED DESCRIPTION

[0047] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0048] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0049] It should be understood that in the present application, "connection" and "connected" may refer to a mechanical connection relationship or a physical connection relationship, that is, A and B are connected or A and B are connected may mean that there are fastening components (such as screws, bolts, rivets, etc.) between A and B, or A and B are in contact with each other and A and B are difficult to separate.

[0050] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meanings as commonly understood by those of ordinary skill in the art.

[0051] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0052] On the one hand, combined with Figure 1 As shown, this embodiment provides a correction system for a liquid injection hole 100a and an explosion-proof valve 100b, and the system includes: a measuring module 1 and a correction module 2.

[0053] The measuring module 1 is located on at least one side of the battery conveyor line (not shown in the figure), and is used to determine the deviation angle of the injection hole 100a and the explosion-proof valve 100b on the battery 100 to be tested; the correction module 2 is located on the downstream side of the measuring module 1, and the correction module 2 is used to adjust the position of the injection hole 100a and / or the explosion-proof valve 100b so that the deviation angle of the injection hole 100a and the explosion-proof valve 100b meets the target angle.

[0054] In the correction system for the injection hole 100a and the explosion-proof valve 100b of the present embodiment, a measuring module 1 is arranged on one side of the battery conveyor line, which can measure the deviation angle of the injection hole 100a and the explosion-proof valve 100b on the battery 100 to be tested, and a correction module 2 is arranged downstream of the measuring module 1. The correction module 2 can adjust the position of the injection hole 100a and / or the explosion-proof valve 100b according to the measurement result of the measuring module 1, and correct the deviation angle of the injection hole 100a and the explosion-proof valve 100b, so that the deviation angle of the injection hole 100a and the explosion-proof valve 100b meets the target angle, thereby improving the production accuracy and yield of the battery.

[0055] In some possible implementations, reference Figure 3 and Figure 4As shown, the battery to be tested 100 includes a cylindrical shell, a battery cell, a first battery cover 1001 and a second battery cover 1002, the two ends of the shell are open respectively, the battery cell is located in the shell, and the first battery cover 1001 and the second battery cover 1002 are respectively covered on the two ends of the shell. One of the first battery cover 1001 and the second battery cover 1002 corresponds to the positive electrode of the battery to be tested 100, and the other of the first battery cover 1001 and the second battery cover 1002 corresponds to the negative electrode of the battery to be tested 100. Exemplarily, one of the injection hole 100a and the explosion-proof valve 100b is located on the first battery cover 1001, and the other is located on the second battery cover 1002.

[0056] The deviation angle between the injection hole 100a and the explosion-proof valve 100b is the angle between the connection line between the injection hole 100a and the center of the battery to be tested, and the connection line between the explosion-proof valve 100b and the center of the battery to be tested, projected along the axial direction of the battery to be tested 100. The existence of this angle is not only convenient for the injection operation, but also can ensure to a certain extent that the explosion-proof valve 100b can be effectively opened to release the pressure when the internal pressure of the battery increases abnormally. If the deviation angle between the injection hole 100a and the explosion-proof valve 100b exceeds the target angle, when the position of the injection hole 100a meets the injection operation, the position of the explosion-proof valve 100b may not be aligned with the pressure relief channel of the battery, and may be blocked by the mounting bracket, and when the position of the explosion-proof valve 100b is aligned with the pressure relief channel, the position of the injection hole 100a may not be able to perform the injection operation.

[0057] In addition, taking cylindrical lithium-ion batteries as an example, multiple cylindrical lithium-ion batteries are usually assembled in a modular manner to form a battery pack with a larger capacity. If the positions of the injection hole 100a and the explosion-proof valve 100b of each cylindrical lithium-ion battery are different, the battery pack assembled in a modular manner will not be able to realize the automatic injection and pressure relief structure design.

[0058] In some possible implementations, the injection hole 100a is mainly used to inject electrolyte into the battery during the battery production process. The electrolyte is a key component of the battery. It plays a role in ion transmission during the battery charging and discharging process, allowing the battery to work normally. The injection amount of the electrolyte can be accurately controlled through the injection hole 100a to ensure that the chemical system inside the battery is in the best state, thereby improving the performance and service life of the battery.

[0059] For example, a sealing design may be provided around the injection hole 100 a , such as a rubber plug or a metal sealing ring, to prevent leakage of the electrolyte.

[0060] In some possible implementations, the explosion-proof valve 100b is used to open in time to release the internal pressure when the pressure inside the battery increases sharply due to various abnormal conditions such as short circuit, overcharge, overheating, etc., to prevent the battery shell from exploding due to excessive pressure, and effectively protect the personal safety of users and equipment safety. By releasing the pressure in time, the internal structure of the battery is prevented from being damaged due to excessive pressure, such as electrode deformation, diaphragm rupture, etc., thereby protecting the performance of the battery to a certain extent and reducing the occurrence of irreversible damage to the battery due to excessive pressure.

[0061] Exemplarily, the battery explosion-proof valve 100b has a variety of structural types, including a notch-type explosion-proof valve 100b, a bursting disc-type explosion-proof valve 100b, a safety valve-type explosion-proof valve 100b, and the like.

[0062] Combination Figure 1 and Figure 2 As shown, in some embodiments, the measuring module 1 includes at least one first image sensor 11 and a control unit 12, at least one first image sensor 11 is electrically connected to the control unit 12, at least one first image sensor 11 is used to respectively capture images of the injection hole 100a and the explosion-proof valve 100b, and the control unit 12 is used to determine the deviation angles of the injection hole 100a and the explosion-proof valve 100b.

[0063] Through the above arrangement, the measuring module 1 can use the first image sensor 11 to collect images of the injection hole 100a and the explosion-proof valve 100b. Then, the control unit 12 can confirm the deviation angle of the injection hole 100a and the explosion-proof valve 100b based on the images of the injection hole 100a and the explosion-proof valve 100b based on image recognition technology and image processing algorithms, and the measurement efficiency and accuracy of the deviation angle are higher.

[0064] Exemplarily, the first image sensor 11 adopts a CCD, namely a charge coupled device (Charge Coupled Device).

[0065] In some possible implementations, reference Figure 2 As shown, the measuring module 1 also includes at least one fill light. Each first image sensor 11 can be respectively configured with at least one fill light. The fill light can provide fill light when the first image sensor 11 captures images of the liquid injection hole 100a and the explosion-proof valve 100b, thereby improving the image capture quality, which is beneficial to improving the recognition accuracy and efficiency of the control unit 12.

[0066] Exemplarily, the fill lights and the first image sensors 11 are connected in a one-to-one correspondence, and each first image sensor 11 is connected to a fill light.

[0067] Combination Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments, the battery to be tested 100 includes a first battery cover 1001 and a second battery cover 1002, the first battery cover 1001 and the second battery cover 1002 are respectively located at two axial ends of the battery to be tested 100, the injection hole 100a is located on the first battery cover 1001, and the explosion-proof valve 100b is located on the second battery cover 1002.

[0068] There are two first image sensors 11 , which are respectively arranged at two axial ends of the battery to be tested 100 and are used to collect images of the first battery cover 1001 and the second battery cover 1002 .

[0069] Through the above arrangement, the measuring module 1 can use the two first image sensors 11 to respectively capture images of the first battery cover 1001 with the injection hole 100a and the second battery cover 1002 with the explosion-proof valve 100b, and then the control unit 12 combines the two images to determine the deviation angles of the injection hole 100a and the explosion-proof valve 100b.

[0070] Exemplarily, the first battery cover plate 1001 and the second battery cover plate 1002 are coaxially arranged.

[0071] Combination Figure 5 , Figure 6 and Figure 7 As shown, in some embodiments, the control unit 12 is used to determine a first connecting line 001 between the center of the first battery cover 1001 and the center of the injection hole 100a, and determine a first angle between the first connecting line 001 and the plumb line 003; it is also used to determine a second connecting line 002 between the center of the second battery cover 1002 and the center of the explosion-proof valve 100b, and determine a second angle between the second connecting line 002 and the plumb line 003; the deviation angle between the injection hole 100a and the explosion-proof valve 100b is determined according to the absolute value of the difference between the first angle and the second angle.

[0072] Through the above arrangement, in order to simplify the recognition efficiency of the control unit 12 for the deviation angle, the control unit 12 confirms the first angle between the first connecting line 001 corresponding to the injection hole 100a and the plumb line 003, and the second angle between the second connecting line 002 corresponding to the explosion-proof valve 100b and the plumb line 003, wherein the plumb line 003 can be used as a reference standard. Through simple mathematical operations, the deviation angle of the injection hole 100a and the explosion-proof valve 100b can be determined. The recognition process is simpler and more direct, which is conducive to improving the recognition efficiency and recognition accuracy of the deviation angle and reducing the cost and energy consumption of the control unit 12.

[0073] In some embodiments, the control unit 12 is also used to compare the deviation angle and the target angle. When the deviation angle is less than or equal to the target angle, the control unit 12 outputs a first instruction that does not require correction. When the deviation angle is greater than the target angle, the control unit 12 outputs a second instruction that requires correction.

[0074] In this embodiment, in addition to outputting the measurement results, the control unit 12 also needs to determine whether the correction module 2 needs to adjust the position of the injection hole 100a and / or the explosion-proof valve 100b based on the measurement results, thereby realizing a closed-loop system from measuring the deviation angle of the injection hole 100a and the explosion-proof valve 100b to correcting the deviation.

[0075] In some embodiments, the target angle ranges from 0 to 10 degrees. When the deviation angles of the injection hole 100a and the explosion-proof valve 100b meet the above range, the battery to be measured can meet production requirements and meet the scene requirements of injection operation and explosion-proof pressure relief.

[0076] Combination Figure 8 , Fig. 9 and Fig.10 As shown, in some embodiments, the deviation correction module 2 includes a clamping mechanism 21 and a rotating mechanism 25 , and the clamping mechanism 21 includes a base member 211 , three movable clamping blocks 212 and a pre-tightening push rod 213 .

[0077] Three movable clamping blocks 212 are arranged on the base member 211 at intervals along the circumferential direction. The preload push rod 213 is located between the three movable clamping blocks 212 . The base member 211 is connected to the rotating mechanism 25 .

[0078] Through the above arrangement, the correction module 2 can use three movable clamps 212 to coaxially clamp and fix the first battery cover 1001 or the second battery cover 1002 of the battery to be tested 100, and the pre-tightening push rod 213 can provide axial pre-tightening force to the first battery cover 1001 or the second battery cover 1002, so that the first battery cover 1001 or the second battery cover 1002 is pressed on the cylindrical shell of the battery to be tested 100. If the measuring module 1 confirms that the deviation angle of the injection hole 100a and the explosion-proof valve 100b meets the target angle, the rotating mechanism 25 does not need to be started. If the measuring module 1 confirms that the deviation angle of the injection hole 100a and the explosion-proof valve 100b does not meet the target angle, the rotating mechanism 25 is started to drive the first battery cover 1001 or the second battery cover 1002 to rotate a specific angle, adjust the position of the injection hole 100a and / or the explosion-proof valve 100b, and reduce the deviation angle of the injection hole 100a and the explosion-proof valve 100b.

[0079] Exemplarily, the rotating mechanism 25 is connected to the control unit 12 to receive a second instruction output by the control unit 12 requiring deviation correction.

[0080] In some possible implementations, reference Fig. 9 As shown, there are two correcting modules 2, one of which is arranged at one axial end of the battery 100 to be tested, and the clamping mechanism 21 therein is used to clamp and fix the first battery cover 1001, and the other correcting module 2 is arranged at the other axial end of the battery 100 to be tested, and the clamping mechanism 21 therein is used to clamp and fix the second battery cover 1002.

[0081] The two correction modules 2 can be electrically connected to the control unit 12 respectively, and the control unit 12 can output the corresponding second instruction to the rotation mechanism 25 in each correction module 2 respectively. For example, when the first angle corresponding to the injection hole 100a is less than 5°, but the second angle corresponding to the explosion-proof valve 100b is greater than 5°, it is only necessary to adjust the position of the explosion-proof valve 100b, and the control unit 12 outputs the second instruction to the rotation mechanism 25 of the correction module 2 corresponding to the second battery cover 1002. Alternatively, when the first angle corresponding to the injection hole 100a is greater than 5° and the second angle corresponding to the explosion-proof valve 100b is also greater than 5°, it is necessary to adjust the positions of the injection hole 100a and the explosion-proof valve 100b at the same time, and the control unit 12 outputs the second instruction to the rotation mechanism 25 of the correction module 2 corresponding to the first battery cover 1001 and the rotation mechanism 25 of the correction module 2 corresponding to the second battery cover 1002, and the rotation angles in the second instructions received by the two rotating structures can be the same or different.

[0082] Combination Figure 8 and Fig. 9 As shown, in some embodiments, the deviation correction module 2 further includes a lifting mechanism 22 and a feeding mechanism 23 , the lifting mechanism 22 is connected to the feeding mechanism 23 , and the clamping mechanism 21 is connected to the lifting mechanism 22 .

[0083] In this embodiment, the correction module 2 can also have a lifting mechanism 22 and a feeding mechanism 23. By using the lifting mechanism 22 and the feeding mechanism 23, the correction module 2 can realize the lifting and straightening processing of the first battery cover plate 1001 and the second battery cover plate 1002, so that the first battery cover plate 1001 and the second battery cover plate 1002 are accurately matched with the cylindrical shell respectively, which is convenient for entering the pre-welding station for precise pre-welding processing.

[0084] Exemplarily, the feeding mechanism 23 includes a first feeding mechanism 231 and a second feeding mechanism 232, and the working directions of the first feeding mechanism 231 and the second feeding mechanism 232 are perpendicular to each other, so that the correction module 2 can use the first feeding mechanism 231, the second feeding mechanism 232 and the lifting mechanism 22 to perform three-dimensional movement of the first battery cover plate 1001 and the second battery cover plate 1002, which is beneficial to improve the working ability of the correction module 2.

[0085] Combination Fig. 9 As shown, in some embodiments, the correction module 2 also includes a clamping mechanism 24, which is located between the two correction modules 2. When the two correction modules 2 respectively lift the first battery cover 1001 and the second battery cover 1002, the clamping mechanism 24 can clamp and fix the position of the cylindrical shell to prevent the cylindrical shell from being misplaced.

[0086] Combination Fig.11 As shown, in some embodiments, the correction system of the liquid injection hole 100a and the explosion-proof valve 100b also includes a detection module 31, and the detection module 31 is located on the downstream side of the correction module 2. The detection module 31 includes at least one second image sensor 3111, and the at least one second image sensor 3111 is used to collect the deviation angles of the liquid injection hole 100a and the explosion-proof valve 100b of the battery to be tested 100 after being processed by the correction module 2, and detect whether there are quality problems in the correction processing and lifting processing of the correction module 2, so as to further improve the product quality of the battery to be tested 100.

[0087] On the other hand, the present embodiment provides a battery production line, which includes the correction system of the liquid injection hole 100a and the explosion-proof valve 100b of the present application.

[0088] The battery production line of this embodiment adopts the correction system of the injection hole 100a and the explosion-proof valve 100b of this application, and has all the beneficial technical effects of all the embodiments of this invention. Among them, the deviation angles of the injection hole 100a and the explosion-proof valve 100b can meet the target angle, thereby improving the production accuracy and yield of the battery.

[0089] On the other hand, this embodiment provides a battery, which is produced and processed using the battery production line of the present application.

[0090] The battery of this embodiment is processed using the battery production line of the present application, and has all the beneficial technical effects of all the embodiments herein. The deviation angles of the liquid injection hole and the explosion-proof valve in the battery can meet the target angle, which can ensure the normal valve opening and pressure release of the battery, and has high safety.

[0091] It should be noted that the "several" and "at least one" mentioned in this article refer to one or more, and "multiple" and "at least two" refer to two or more. "And / or" describes the association relationship of the associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0092] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0093] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0094] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0095] In the description of this specification, the reference terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application.

[0096] The above description is only an embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. A correction system for a liquid injection hole and an explosion-proof valve, characterized in that: The system comprises: a measuring module (1) and a deviation correction module (2); The measuring module (1) is located on at least one side of the battery conveyor line and is used to determine the deviation angle of the liquid injection hole (100a) and the explosion-proof valve (100b) on the battery (100) to be tested; The deviation correction module (2) is located on the downstream side of the measuring module (1), and the deviation correction module (2) is used to adjust the position of the liquid injection hole (100a) and / or the explosion-proof valve (100b) so that the deviation angle of the liquid injection hole (100a) and the explosion-proof valve (100b) meets the target angle.

2. The injection hole and explosion-proof valve correction system according to claim 1 is characterized in that: The measuring module (1) comprises at least one first image sensor (11) and a control unit (12); the at least one first image sensor (11) is electrically connected to the control unit (12), the at least one first image sensor (11) is used to collect images of the liquid injection hole (100a) and the explosion-proof valve (100b), respectively; and the control unit (12) is used to determine the deviation angles of the liquid injection hole (100a) and the explosion-proof valve (100b).

3. The injection hole and explosion-proof valve correction system according to claim 2 is characterized in that: The battery to be tested (100) comprises a first battery cover plate (1001) and a second battery cover plate (1002), wherein the first battery cover plate (1001) and the second battery cover plate (1002) are respectively located at two axial ends of the battery to be tested (100), the injection hole (100a) is located on the first battery cover plate (1001), and the explosion-proof valve (100b) is located on the second battery cover plate (1002); The number of the first image sensors (11) is two, and the two first image sensors (11) are respectively arranged at two axial ends of the battery to be tested (100), and are respectively used to capture images of the first battery cover plate (1001) and the second battery cover plate (1002).

4. The injection hole and explosion-proof valve correction system according to claim 3 is characterized in that: The control unit (12) is used to determine a first connecting line (001) between the center of the first battery cover plate (1001) and the center of the liquid injection hole (100a), and to determine a first angle a1 between the first connecting line (001) and a plumb line (003); It is also used to determine a second connecting line (002) between the center of the second battery cover plate (1002) and the center of the explosion-proof valve (100b), and to determine a second angle a2 between the second connecting line (002) and the plumb line (003); The deviation angle between the liquid injection hole (100a) and the explosion-proof valve (100b) is determined according to the absolute value of the difference between the first angle a1 and the second angle a2.

5. The injection hole and explosion-proof valve correction system according to claim 4 is characterized in that: The control unit (12) is further used to compare the deviation angle with the target angle; when the deviation angle is less than or equal to the target angle, the control unit (12) outputs a first instruction that does not require deviation correction; and when the deviation angle is greater than the target angle, the control unit (12) outputs a second instruction that requires deviation correction.

6. The injection hole and explosion-proof valve correction system according to claim 1 is characterized in that: The target angle has a value range of 0-10°.

7. The liquid injection hole and explosion-proof valve correction system according to any one of claims 1 to 6, characterized in that: The deviation correction module (2) comprises a clamping mechanism (21) and a rotating mechanism (25); the clamping mechanism (21) comprises a base member (211), three movable clamping blocks (212) and a pre-tightening push rod (213); The three movable clamping blocks (212) are arranged on the base member (211) at intervals along the circumferential direction, the preload push rod (213) is located between the three movable clamping blocks (212), and the base member (211) is connected to the rotating mechanism (25).

8. The injection hole and explosion-proof valve correction system according to claim 7 is characterized in that: The deviation correction module (2) further comprises a lifting mechanism (22) and a feeding mechanism (23); the lifting mechanism (22) is connected to the feeding mechanism (23); and the clamping mechanism (21) is connected to the lifting mechanism (22).

9. A battery production line, characterized in that: The battery production line comprises the injection hole and explosion-proof valve correction system according to any one of claims 1 to 8.

10. A battery, characterized in that: The battery is produced by the battery production line according to claim 9.

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