Vacuum suction device and battery production system

Abstract

The present application discloses a vacuum suction device and a battery production system, the vacuum suction device comprises: a mounting plate; at least one group of suction nozzle assemblies, which comprises at least three suction nozzles, and the at least three suction nozzles are sequentially arranged on the mounting plate; the distance between the first suction nozzle and the second suction nozzle among the at least three suction nozzles is recorded as the first distance, and the distance between the first suction nozzle and the third suction nozzle is recorded as the second distance, the first distance is used to match the first card position distance, and the second distance matches the second card position distance; the control element is configured to control the connection or disconnection of the vacuum generator with the first suction nozzle, the second suction nozzle and the third suction nozzle respectively. The battery vacuum suction device defines the distance between the suction nozzles, which can exhaust at least two battery cells of different specifications (sizes), and has the characteristics of strong versatility.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and in particular to a vacuum suction device and a battery production system. Background Art

[0002] In the battery testing process, the formation test is to charge the battery with a small current to activate the active substances inside the battery and form an SE I film on the surface of the battery's negative electrode material. During the formation and activation process of the lithium battery, the electrode and the electrolyte react, and the electrolyte decomposes, which will produce some gas. The production of these gases will cause the battery to swell. During the battery expansion process, we need to discharge the gas in time.

[0003] In view of this, how to discharge the gas in the battery is a technical problem that technicians in this field need to solve. Summary of the invention

[0004] In view of the above problems, the present application provides a vacuum suction device and a battery production system for exhausting battery cells of at least two specifications.

[0005] In the first aspect, the present application provides a vacuum suction device, characterized in that it includes: a mounting plate; at least one group of suction nozzle assemblies, at least one group of the suction nozzle assemblies includes at least three suction nozzles, and at least three suction nozzles are arranged on the mounting plate in sequence; the distance between the first suction nozzle and the second suction nozzle among the at least three suction nozzles is recorded as the first distance, and the distance between the first suction nozzle and the third suction nozzle is recorded as the second distance, wherein the first distance is used to match the first card position distance, and the second distance matches the second card position distance; a control element, the control element is configured to control the connection or disconnection of the vacuum generator with the first suction nozzle, the second suction nozzle and the third suction nozzle respectively. In the technical solution of the embodiment of the present application, the battery vacuum suction device defines the distance between the suction nozzles, which can be used to exhaust battery cells of at least two different specifications (sizes), and has the characteristics of strong versatility.

[0006] In some embodiments, the nozzle assembly includes six nozzles, and the spacing between the second nozzle and the fourth nozzle, and the spacing between the fourth nozzle and the sixth nozzle of the six nozzles are equal to the first spacing, and the spacing between the third nozzle and the fifth nozzle is equal to the second spacing. In this way, a set of nozzle assemblies can exhaust four first battery cells or three second battery cells.

[0007] In some embodiments, the vacuum suction device includes multiple groups of nozzle assemblies, which are sequentially arranged on the mounting plate at intervals. Two adjacent groups of nozzle assemblies of the vacuum suction device can exhaust multiple battery cells of the same specification on the same battery tray, and has strong scalability.

[0008] In some embodiments, the vacuum suction device includes four groups of suction nozzle assemblies. Such a vacuum suction device is suitable for the exhaust requirements of the current 16-channel battery cells or 12-channel battery cells.

[0009] In some embodiments, the vacuum suction device further comprises at least three gas pipelines which are independent of each other, and the at least three gas pipelines connect the vacuum generator to the first suction nozzle, the second suction nozzle, and the third suction nozzle respectively through the control element. The vacuum suction device of the present application can quickly adjust its working mode by switching the working position of the control element, that is, exhausting the first battery cell or exhausting the second battery cell.

[0010] In some embodiments, the nozzle assembly includes six nozzles, among which the spacing between the second nozzle and the fourth nozzle, and between the fourth nozzle and the sixth nozzle is equal to the first spacing, and the spacing between the third nozzle and the fifth nozzle is equal to the second spacing; the vacuum suction device includes four independent gas pipelines, the first gas pipeline is connected to the first nozzle, the second gas pipeline is connected to the second nozzle and the sixth nozzle, the third gas pipeline is connected to the third nozzle and the fifth nozzle, and the fourth nozzle is connected to the fourth gas pipeline. The vacuum suction device of the present application can quickly adjust its working mode by switching the working position of the control element, that is, exhausting at least three first battery cells at a time or exhausting two second battery cells.

[0011] In some embodiments, the four gas pipelines extend along the direction in which the six suction nozzles are arranged in sequence, and the four gas pipelines are arranged on both sides of the mounting plate and are arranged in sequence in the height direction. In this arrangement, each suction nozzle body can be connected to the corresponding gas pipeline only through a right-angle elbow, which perfectly solves the interference problem with other pipelines when each suction nozzle is connected to the corresponding gas pipeline, and can fully utilize the space in the height direction of the suction nozzle.

[0012] In some embodiments, the vacuum suction device includes multiple groups of nozzle assemblies, which are sequentially arranged on the mounting plate at intervals, and the spacing between two adjacent groups of nozzle assemblies is equal to the first spacing. The two adjacent groups of nozzle assemblies of the vacuum suction device can exhaust multiple battery cells of the same specification on the same battery tray, and has strong scalability.

[0013] In some embodiments, the first suction nozzles in the plurality of suction nozzle assemblies share a first gas pipeline, the second suction nozzles and the sixth suction nozzles share a second gas pipeline, the third suction nozzles and the fifth suction nozzles share a third gas pipeline, and the fourth suction nozzles share a fourth gas pipeline. The plurality of suction nozzles in the suction nozzle assembly can be connected to the vacuum generator through four gas pipelines, so that the overall structure of the vacuum suction device is simple and compact.

[0014] In some embodiments, the vacuum suction device further comprises a fixing member, the fixing member is configured to be connected to an external device, and the mounting plate is detachably mounted on the fixing member. The mounting plate is detachably mounted on the fixing member so that the vacuum suction device can be replaced with a new device when it is damaged.

[0015] In some embodiments, the mounting plate is provided with a first slot extending in the direction in which each suction nozzle is sequentially spaced and arranged, and a second slot perpendicular to the first slot; the fixing member is provided with a positioning pin hole and a threaded hole; the fixing member and the mounting plate are positioned and connected by a positioning pin passing through the first slot and the positioning pin hole, and under the action of an external force, the mounting plate rotates around the positioning pin relative to the fixing member until the fixing screw passes through the second slot and is connected to the fixing member through the threaded hole. The vacuum suction device of the present application is quick and convenient to assemble and disassemble, and has a simple structure.

[0016] In some embodiments, the positioning pin includes: a connecting portion, the connecting portion is configured to pass through the first slot and be inserted into the positioning pin hole, and the mounting plate rotates relative to the fixing member around the connecting portion under the action of an external force; and a limiting portion, the limiting portion is arranged on the connecting portion and is configured to limit the movement of the mounting plate relative to the fixing member along the axial direction of the connecting portion. The positioning pin of the present application has a simple structure and is easy to process.

[0017] In some embodiments, the connecting portion further has a second threaded hole, and the connecting portion and the fixing member are fixedly connected by a bolt matched with the second threaded hole. After the mounting plate is connected to the fixing member by a fixing screw, the connecting portion and the fixing member are connected by bolts to indirectly enhance the connection strength between the mounting plate and the fixing member.

[0018] In some embodiments, the fixing screw comprises: a threaded rod, the threaded rod being configured to pass through the second slot and be threadedly connected to the threaded hole; and a stopper, the stopper being arranged at the end of the threaded rod and configured to press the mounting plate onto the fixing member. The fixing screw of the present application has a simple structure and is easy to process.

[0019] In some embodiments, the fixing member includes a first fixing plate and a second fixing plate, the positioning pin hole is arranged on the first fixing plate, and the first threaded hole is arranged on the second fixing plate. The fixing member includes two fixing plates arranged separately, and the relative size between the positioning pin hole and the threaded hole does not need to be considered during processing. It is only necessary to ensure that the spacing between the two matches the spacing between the first slot and the second slot on the mounting plate during assembly. The process is simple and the manufacturing cost is low.

[0020] In some embodiments, the suction nozzle includes: a connecting tube, which penetrates the mounting plate in a movably manner, and one end of the connecting tube is constructed to be relatively connected to the vacuum generator through the control element; a suction nozzle body, which is arranged at the other end of the connecting tube; a limit member, which is arranged on the connecting tube; and an elastic element, which is constructed to press the mounting plate against the limit member.

[0021] When assembling the first suction nozzle and the first battery cell or the second battery cell, first push the suction nozzle to overcome the elastic force of the elastic element and lift it up, place the first battery cell or the second battery cell thereunder, remove the external force, and the suction nozzle body is sealed and connected to the first battery cell or the second battery cell under the elastic force of the elastic element, and communicates with the cavity of the first battery cell or the second battery cell. Conversely, when the first battery cell or the second battery cell is removed, the suction nozzle body is reset under the action of the elastic element. In addition, since the outer dimensions of the second battery cell are larger than those of the first battery cell, when multiple second battery cells are connected to each suction nozzle respectively, the second battery cell and some of the suction nozzles will interfere with each other in position. The suction nozzle of the present application can be pushed by the second battery cell to be lifted to an appropriate height relative to the mounting plate to avoid the second battery cell.

[0022] In a second aspect, the present application provides a battery production system, including battery production equipment and a vacuum suction device arranged on the battery production equipment, wherein the vacuum suction device includes the vacuum suction device described above.

[0023] The present application provides a battery vacuum suction device of a novel structure, which includes a mounting plate and at least one set of suction nozzle assemblies. The at least one set of suction nozzle assemblies includes at least three suction nozzles, which are sequentially arranged on the mounting plate at intervals, and the spacing between the first suction nozzle and the second suction nozzle in the at least three suction nozzles is recorded as a first spacing, and the spacing between the first suction nozzle and the third suction nozzle is recorded as a second spacing, wherein the first spacing is used to match the first clamping position spacing, and the second spacing is matched with the second clamping position spacing.

[0024] The battery vacuum suction device further includes a vacuum generator and a control element, wherein the control element is configured to control the connection or disconnection of the vacuum generator with the first suction nozzle, the second suction nozzle and the third suction nozzle respectively.

[0025] It should be noted that the first card spacing and the second card spacing are not equal. The first card spacing is the card spacing on the first battery tray, and the first battery tray is used to place the first battery cell. Similarly, the second card spacing is the card spacing on the second battery tray, and the second battery tray is used to place the second battery cell. The first battery cell and the second battery cell are battery cells of different specifications, and the specifications of the first battery cell are smaller than those of the second battery cell.

[0026] When the vacuum suction device of the present application is used to exhaust the first battery cell, first, two adjacent first battery cells on the first battery tray are connected to the first suction nozzle and the second suction nozzle respectively to ensure that the two suction nozzles are connected to the cavities of the corresponding first battery cells; secondly, a control element is used to connect the vacuum generator with the first suction nozzle and the second suction nozzle, and the vacuum generator and the third suction nozzle are disconnected; finally, the vacuum generator is started to form a negative pressure in the first battery cell, and the gas in the first battery cell is discharged using the pressure difference.

[0027] Similarly, when the vacuum suction device is exhausting the second battery cell, first, the two adjacent second battery cells on the second battery tray are connected to the first suction nozzle and the third suction nozzle respectively to ensure that the two suction nozzles are connected to the cavities of the corresponding second battery cells; secondly, the vacuum generator is connected to the first suction nozzle and the third suction nozzle using a control element, and the vacuum generator and the second suction nozzle are disconnected; finally, the vacuum generator is started to form a negative pressure in the second battery cell, and the gas in the first battery cell is discharged using the pressure difference.

[0028] It can be seen that, compared with the prior art, the battery vacuum suction device of the present application can exhaust at least two battery cells of different specifications (sizes), and has the characteristic of strong versatility.

[0029] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0031] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the battery vacuum suction device provided by the present application;

[0032] Figure 2 yes Figure 1 The schematic diagram of the main structure of the battery vacuum suction device shown;

[0033] Figure 3 yes Figure 2 A schematic diagram of the structure of the vacuum suction device for exhausting the first battery cell;

[0034] Figure 4 yes Figure 2 The middle vacuum suction device is a structural principle diagram for exhausting the second battery cell.

[0035] Figure 5 yes Figure 1 A side view of the vacuum suction device shown;

[0036] Figure 6 It is a structural diagram of the mounting plate and the fixing assembly;

[0037] Figure 7 yes Figure 6 AA section view;

[0038] Figure 8 It is a schematic diagram of the structure of the mounting plate;

[0039] Fig. 9 It is a schematic diagram of the structure of the positioning pin;

[0040] Fig.10 yes Fig. 9 BB-direction cross-sectional structural diagram;

[0041] Fig.11 and Fig.12 They are respectively a schematic diagram of the main structure and a schematic diagram of the top structure of the fixing screw;

[0042] Fig.13 It is a structural schematic diagram of the first suction nozzle and the mounting plate assembly.

[0043] Figure 1 and Fig.13 The one-to-one correspondence between the component names and the reference numerals is as follows:

[0044] 1 mounting plate: 10 first slot, 11 second slot, 12 through hole;

[0045] 2 Nozzle assembly: 21 first nozzle, 210 connecting pipe, 2101 first pipe fitting, 2102 second pipe fitting, 211 nozzle body, 212 stopper, 213 elastic element, 22 second nozzle, 23 third nozzle, 24 fourth nozzle, 25 fifth nozzle, 26 sixth nozzle;

[0046] 31 first gas pipeline, 32 second gas pipeline, 33 third gas pipeline, 34 fourth gas pipeline;

[0047] 41 first fixing plate, 42 second fixing plate, 420 first threaded hole;

[0048] 5 positioning pin: 50 connecting part, 51 limiting part;

[0049] 6. Specified screw: 60 threaded rod, 61 limit head;

[0050] 7 first battery cell, 8 second battery cell. DETAILED DESCRIPTION

[0051] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0053] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0054] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0055] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two).

[0056] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0057] In the testing process of battery cells, the formation test is to charge the battery with a small current to activate the active substances inside the battery and form a SEI film on the surface of the battery's negative electrode material. During the formation and activation process of the lithium battery, the electrode and electrolyte react, and the electrolyte decomposes, which will produce some gas. The production of these gases will cause the battery to expand. During the battery expansion process, we need to discharge the gas in time.

[0058] At present, battery cells are exhausted by a battery vacuum suction device. The existing battery vacuum suction device includes a vacuum pump, an air pipe connected to the vacuum pump, and a plurality of suction nozzles arranged on the air pipe at equal intervals in sequence, and each suction nozzle is connected to the air pipe, and a switch valve is arranged between the vacuum pump and the suction nozzle to control the on-off between the vacuum pump and the air pipe.

[0059] Before exhausting, the battery cells are placed on a tray, which is provided with multiple slots at equal intervals, and each slot contains a battery cell. In order to exhaust multiple battery cells at one time, the number of suction nozzles of the battery vacuum suction device is consistent with the number of slots on the tray, and the spacing between two adjacent slots is equal. The spacing between the slots refers to the distance between the axes of the connection ports of two adjacent battery cells, through which the suction nozzle is connected to the battery cell.

[0060] When the battery vacuum suction device exhausts the battery cells on the tray, each suction nozzle is inserted into the connection port on each battery cell, the vacuum pump is started, and the vacuum pump and the air pipe are controlled to be connected, so that negative pressure is formed in each battery cell and the gas inside is discharged through the suction nozzle.

[0061] It can be seen that each battery vacuum suction device can only be used with trays with equal spacing between the clamping positions to exhaust battery cells of the same specification. The same specification means that the battery cells have the same external dimensions. Therefore, the existing battery vacuum suction devices have the problem of poor versatility.

[0062] To this end, the present application provides a battery vacuum suction device of a novel structure, which includes a mounting plate and at least one set of suction nozzle assemblies. The at least one set of suction nozzle assemblies includes at least three suction nozzles, which are sequentially arranged on the mounting plate at intervals, and the spacing between the first suction nozzle and the second suction nozzle in the at least three suction nozzles is recorded as the first spacing, and the spacing between the first suction nozzle and the third suction nozzle is recorded as the second spacing, wherein the first spacing is used to match the first card position spacing, and the second spacing is matched with the second card position spacing.

[0063] The battery vacuum suction device further includes a vacuum generator and a control element, wherein the control element is configured to control the connection or disconnection of the vacuum generator with the first suction nozzle, the second suction nozzle and the third suction nozzle respectively.

[0064] It should be noted that the first card spacing and the second card spacing are not equal. The first card spacing is the card spacing on the first battery tray, and the first battery tray is used to place the first battery cell. Similarly, the second card spacing is the card spacing on the second battery tray, and the second battery tray is used to place the second battery cell. The first battery cell and the second battery cell are battery cells of different specifications, and the specifications of the first battery cell are smaller than those of the second battery cell.

[0065] When the vacuum suction device of the present application is used to exhaust the first battery cell, first, two adjacent first battery cells on the first battery tray are connected to the first suction nozzle and the second suction nozzle respectively to ensure that the two suction nozzles are connected to the cavities of the corresponding first battery cells; secondly, a control element is used to connect the vacuum generator with the first suction nozzle and the second suction nozzle, and the vacuum generator and the third suction nozzle are disconnected; finally, the vacuum generator is started to form a negative pressure in the first battery cell, and the gas in the first battery cell is discharged using the pressure difference.

[0066] Similarly, when the vacuum suction device is exhausting the second battery cell, first, the two adjacent second battery cells on the second battery tray are connected to the first suction nozzle and the third suction nozzle respectively to ensure that the two suction nozzles are connected to the cavities of the corresponding second battery cells; secondly, the vacuum generator is connected to the first suction nozzle and the third suction nozzle using a control element, and the vacuum generator and the second suction nozzle are disconnected; finally, the vacuum generator is started to form a negative pressure in the second battery cell, and the gas in the first battery cell is discharged using the pressure difference.

[0067] It can be seen that, compared with the prior art, the battery vacuum suction device of the present application can exhaust at least two battery cells of different specifications (sizes), and has the characteristic of strong versatility.

[0068] The vacuum suction device of the present application can exist independently of other equipment. The vacuum suction device is arranged in the exhaust working area. The staff or robot will place the battery tray with the battery cell in the exhaust working area, and then use the vacuum suction device to exhaust the battery cell.

[0069] In other examples, the vacuum suction device can also be set on the battery production equipment, and after completing the test process of the battery cell, the vacuum suction device is used to exhaust the battery cell. The battery production equipment can be a formation system, which is a system for performing formation testing on the battery cell. The formation test of the battery cell refers to charging the battery cell with a small current to activate the active material inside the battery and form an SEI film on the surface of the negative electrode material of the battery.

[0070] The battery cell refers to the smallest unit that makes up the battery. The battery cell includes an end cap, a shell, a battery cell assembly and other functional components.

[0071] The end cap refers to a component that covers the opening of the shell to isolate the internal environment of the battery cell from the external environment. Without limitation, the shape of the end cap can be adapted to the shape of the shell to match the shell. Optionally, the end cap can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap is not easily deformed when squeezed and collided, so that the battery cell can have a higher structural strength and improved safety performance. Functional components such as electrode terminals can be provided on the end cap. The electrode terminal can be used to electrically connect to the battery cell assembly to output or input electrical energy of the battery cell.

[0072] In some embodiments, the end cap may also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value. The material of the end cap may also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this. In some embodiments, an insulating member may also be provided on the inner side of the end cap, and the insulating member may be used to isolate the electrical connection components in the housing from the end cap to reduce the risk of short circuit. Exemplarily, the insulating member may be plastic, rubber, etc.

[0073] The shell is a component used to cooperate with the end cap to form the internal environment of the battery cell, wherein the formed internal environment can be used to accommodate the battery cell assembly, electrolyte and other components. The shell and the end cap can be independent components, and an opening can be set on the shell, and the internal environment of the battery cell is formed by covering the opening with the end cap at the opening. Without limitation, the end cap and the shell can also be integrated. Specifically, the end cap and the shell can form a common connection surface before other components are put into the shell, and when the interior of the shell needs to be encapsulated, the end cap is covered with the shell. The shell can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell can be determined according to the specific shape and size of the battery cell assembly. The material of the shell can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this.

[0074] The cell assembly is the part where the electrochemical reaction occurs in the battery cell. One or more cell assemblies may be contained in the shell. The cell assembly is mainly formed by winding or stacking the positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the cell assembly, and the parts of the positive and negative electrode sheets without active materials each constitute the tabs. The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0075] Reference Figure 1 and Figure 2 ,in, Figure 1 is a three-dimensional structural schematic diagram of an embodiment of a battery vacuum suction device provided in the present application, Figure 2 yes Figure 1 The front structural schematic diagram of the battery vacuum suction device is shown.

[0076] According to some embodiments of the present application, the vacuum suction device of the present application includes a mounting plate 1 and at least one group of suction nozzle assemblies 2; wherein, at least one group of suction nozzle assemblies 2 includes at least three suction nozzles, and the at least three suction nozzles are arranged on the mounting plate 1 in sequence, and the distance between the first suction nozzle 21 and the second suction nozzle 22 among the at least three suction nozzles is recorded as a first distance L1, and the distance between the first suction nozzle 21 and the third suction nozzle 23 is recorded as a second distance L2, wherein the first distance L1 is used to match the first card position distance, and the second distance L2 matches the second card position distance.

[0077] The battery vacuum suction device also includes a vacuum generator (not shown in the figure) and three control elements (not shown in the figure), which are configured to control the connection and disconnection of the vacuum generator with the first suction nozzle 21, the second suction nozzle 22 and the third suction nozzle 23 respectively.

[0078] Among them, the mounting plate 1 is a long strip plate structure, which is constructed for connection with the formation equipment and for limiting the relative positions between each suction nozzle, so that the first suction nozzle 21 and the second suction nozzle 22 can just correspond to the first card position spacing of two adjacent first card positions on the first battery tray, and then the first suction nozzle 21 and the second suction nozzle 22 can just be connected with the two adjacent first battery cells placed on the first battery tray.

[0079] Similarly, the first suction nozzle 21 and the third suction nozzle 23 can just correspond to the second clamping position spacing of two adjacent second clamping positions on the first battery tray, so that the first suction nozzle 21 and the third suction nozzle 23 can just connect with two adjacent second battery cells placed on the second battery tray.

[0080] The mounting plate can be made of a material with a certain rigidity, such as wood, resin, and metal, as long as it can satisfy the function of fixing the nozzle.

[0081] The suction nozzle is a device that can be sealed and connected to the battery cell so that the suction nozzle can communicate with the cavity of the battery cell. When the vacuum generator is activated and the vacuum generator is connected to the suction nozzle, the vacuum generator can suck the gas in the battery cell out of the cavity through the suction nozzle. In addition, the suction nozzle is fixedly or movably arranged on the mounting plate.

[0082] A vacuum generator refers to a device or equipment that uses mechanical, physical, chemical or physicochemical methods to evacuate the container to obtain a vacuum. Vacuum generators include dry screw vacuum pumps, water ring pumps, reciprocating pumps, sliding valve pumps, rotary vane pumps, Roots pumps and diffusion pumps.

[0083] The control element refers to a component that can be connected to the vacuum generator and the suction nozzle, or connected to the vacuum generator or the suction nozzle through a pipeline, and the control element can control the vacuum generator and the suction nozzle to be disconnected or connected. In some embodiments, the control element can be an electromagnetic switch valve.

[0084] See also Figure 3 , the figure is Figure 1 The schematic diagram of the structure of the vacuum suction device for exhausting the first battery cell. In some embodiments, when the vacuum suction device of the present application is exhausting the first battery cell 7, firstly, two adjacent first battery cells 7 on the first battery tray (not shown in the figure) are connected to the first suction nozzle 21 and the second suction nozzle 22 respectively to ensure that the two suction nozzles are connected to the corresponding cavities of the first battery cells 7; secondly, the vacuum generator is connected to the first suction nozzle 21 and the second suction nozzle 22 by using the control element, and the vacuum generator and the third suction nozzle 23 are disconnected; finally, the vacuum generator is started to form a negative pressure in the first battery cell 7, and the gas in the first battery cell 7 is discharged by using the pressure difference.

[0085] See also Figure 4 , the figure is Figure 1 The schematic diagram of the structure of the vacuum suction device for exhausting the second battery cell. In some embodiments, when the vacuum suction device of the present application is exhausting the second battery cell 8, first, two adjacent second battery cells 8 on the second battery tray (not shown in the figure) are connected to the first suction nozzle 21 and the third suction nozzle 23 respectively to ensure that the two suction nozzles are connected to the corresponding cavities of the second battery cells 8; secondly, the vacuum generator is connected to the first suction nozzle 21 and the third suction nozzle 23 using a control element, and the vacuum generator and the second suction nozzle 22 are disconnected; finally, the vacuum generator is started to form a negative pressure in the second battery cell 8, and the gas in the first battery cell 8 is discharged by using the pressure difference.

[0086] It can be seen that, compared with the prior art, the battery vacuum suction device of the present application can exhaust at least two battery cells of different specifications (sizes), and has the characteristic of strong versatility.

[0087] According to some embodiments of the present application, see Figure 2 The nozzle assembly includes six nozzles, among which the spacing between the second nozzle 22 and the fourth nozzle 24, and the spacing between the fourth nozzle 24 and the sixth nozzle 26 are all equal to the first spacing L1, and the spacing between the third nozzle 23 and the fifth nozzle 25 is equal to the second spacing L2.

[0088] Continue to see Figure 3 The first suction nozzle 21, the second suction nozzle 22, the fourth suction nozzle 24 and the sixth suction nozzle 26 of a suction nozzle assembly can be connected to the first battery cell 7 at the same time, that is, a group of suction nozzle assemblies can exhaust four first battery cells 7 at a time.

[0089] Likewise, see Figure 4 The first suction nozzle 21, the third suction nozzle 23 and the fifth suction nozzle 25 of a set of suction nozzle assemblies can be connected to the second battery cells 8 at the same time, that is, a set of suction nozzle assemblies can exhaust three second battery cells 8 at a time.

[0090] It should be noted that the number of nozzles in the nozzle assembly is not limited to 3 or 6. On the basis of satisfying the exhaust function of battery cells of two different specifications, those skilled in the art can adjust the number of nozzles based on the present application.

[0091] According to some embodiments of the present application, see Figure 2 The vacuum suction device of the present application includes a plurality of groups of suction nozzle assemblies 2, which are sequentially arranged on the mounting plate 1 at intervals, and the interval between two adjacent groups of suction nozzle assemblies 2 is equal to the first interval L1.

[0092] Those skilled in the art may select the number of groups of the nozzle assembly 2 according to the actual application scenario and the number of nozzles in the nozzle assembly 2, and only need to ensure that the spacing between the multiple groups of nozzle assemblies is equal to the first spacing L1 or the second spacing L2.

[0093] Two adjacent groups of nozzle assemblies 2 of the vacuum suction device can exhaust multiple battery cells of the same specification on the same battery tray, and has strong scalability.

[0094] According to some embodiments of the present application, see Figure 2 The vacuum suction device of the present application includes 4 groups of suction nozzle assemblies.

[0095] For example, when the nozzle assembly 2 includes 6 nozzles, 4 groups of nozzle assemblies 2 can exhaust 16 first battery cells 7 or 12 second battery cells 8 at a time.

[0096] This vacuum suction device is suitable for the exhaust requirements of the current 16-channel battery cells or 12-channel battery cells.

[0097] According to some embodiments of the present application, see Figure 2 The vacuum suction device also includes at least three gas pipelines that are independent of each other. The at least three gas pipelines connect the vacuum generator to the first suction nozzle 21, the second suction nozzle 22 and the third suction nozzle 23 respectively through the control element.

[0098] The three gas pipelines are respectively a first gas pipeline 31, a second gas pipeline 32 and a third gas pipeline 33. The first suction nozzle 21 is arranged on the first gas pipeline 31 and is connected to the first gas pipeline 31. The second suction nozzle 21 is arranged on the second gas pipeline 32 and is connected to the second gas pipeline 32. The third suction nozzle 23 is arranged on the third gas pipeline 33 and is connected to the third gas pipeline 33.

[0099] In some embodiments, the vacuum suction device can be equipped with an independent vacuum generator for the suction nozzle in the suction nozzle assembly, and a control element is arranged between each vacuum generator and the corresponding gas pipeline. The control element can be a switch valve, and the staff can control the connection or disconnection between each vacuum generator and the corresponding suction nozzle through the corresponding switch valve.

[0100] In other embodiments, the nozzle assembly is only equipped with one vacuum generator, the valve body of the control element has a main valve port and auxiliary valve ports adapted to the number of gas pipelines, and the valve core of the control element slides in its valve body to selectively block the auxiliary valve ports. The control element is connected to the vacuum generator through the main valve port, and is connected to each gas pipeline through each auxiliary valve port. The control element controls the connection and disconnection of each gas pipeline and the vacuum generator by controlling the position of the valve core in the valve body.

[0101] The vacuum suction device of the present application can quickly adjust its working mode by switching the working position of the control element, that is, exhausting the first battery cell 7 or exhausting the second battery cell 8.

[0102] According to some embodiments of the present application, see Figure 2 The nozzle assembly includes six nozzles, among which the spacing between the second nozzle 22 and the fourth nozzle 24, and the spacing between the fourth nozzle 24 and the sixth nozzle 26 are all equal to the first spacing L1, and the spacing between the third nozzle 23 and the fifth nozzle 25 is equal to the second spacing L2.

[0103] The vacuum suction device also includes four independent gas pipelines, the first gas pipeline 31 is connected to the first suction nozzle 21, the second gas pipeline 32 is connected to the second suction nozzle 22 and the sixth suction nozzle 26, the third gas pipeline 33 is connected to the third suction nozzle 23 and the fifth suction nozzle 25, and the fourth suction nozzle 24 is connected to the fourth gas pipeline 34.

[0104] In some embodiments, the vacuum suction device can be configured with an independent vacuum generator for each gas pipeline, that is, the first gas pipeline 31, the second gas pipeline 32, the third gas pipeline 33 and the fourth gas pipeline 34 are respectively connected to their respective vacuum generators through their respective control elements, and each control element can be a switch valve. Opening or disconnecting the switch valve can respectively control the connection or disconnection of the first gas pipeline 31, the second gas pipeline 32, the third gas pipeline 33 and the fourth gas pipeline 34 with their respective vacuum generators.

[0105] In other embodiments, the vacuum suction device is only equipped with one vacuum generator, the valve body of the control element has one main valve port and four auxiliary valve ports, and the valve core of the control element slides in its valve body to selectively block the four auxiliary valve ports. The control element is connected to the vacuum generator through the main valve port, and is connected to four gas pipelines through the four auxiliary valve ports respectively. The control element controls the connection and disconnection of the four gas pipelines and the vacuum generator by controlling the position of the valve core in the valve body.

[0106] For example, when the vacuum suction device is exhausting the first battery cell 7, the control element controls the valve body to block the auxiliary valve port connected to the third gas pipeline 33, the third gas pipeline 33 is disconnected from the vacuum generator, and no negative pressure is generated in the third suction nozzle 13 and the fifth suction nozzle 25. When the vacuum suction device is exhausting the second battery cell 18, the control element controls the valve body to block the auxiliary valve port connected to the second gas pipeline 32 and the fourth gas pipeline 34, the second gas pipeline 32 and the fourth gas pipeline 34 are both disconnected from the vacuum generator, and no negative pressure is generated in the second suction nozzle 12, the fourth suction nozzle 14 and the sixth suction nozzle 16.

[0107] The vacuum suction device of the present application can quickly adjust its working mode by switching the working position of the control element, that is, to exhaust at least four first battery cells 7 or three second battery cells 8 at a time.

[0108] According to some embodiments of the present application, see Figure 5 , please also refer to Figure 2 ,in, Figure 5 yes Figure 1 The vacuum suction device of the present application comprises four gas pipelines, the four gas pipelines extend along the direction in which the six suction nozzles are arranged in sequence, the four gas pipelines are arranged on both sides of the mounting plate 1, and are arranged in sequence in the height direction.

[0109] In detail, the four gas pipelines are respectively a first gas pipeline 31, a second gas pipeline 32, a third gas pipeline 33 and a fourth gas pipeline 34. The four gas pipelines are arranged and extended sequentially along the first suction nozzle 21, the second suction nozzle 22, the third suction nozzle 23, the fourth suction nozzle 24, the fifth suction nozzle 25 and the sixth suction nozzle 26 to make full use of the space arrangement in the length direction of the mounting plate 1.

[0110] The four gas pipelines are arranged on both sides of the mounting plate 1 and are arranged in sequence in the height direction. With such arrangement, each nozzle body can be connected to the corresponding gas pipeline only through a right-angle elbow, which perfectly solves the problem of interference with other pipelines when each nozzle is connected to the corresponding gas pipeline, and can make full use of the space in the height direction of the nozzle.

[0111] According to some embodiments of the present application, see Figure 2 The vacuum suction device of the present application includes a plurality of groups of suction nozzle assemblies 2, which are sequentially arranged on the mounting plate 1 at intervals, and the interval between two adjacent groups of suction nozzle assemblies 2 is equal to the first interval L1.

[0112] In detail, the vacuum suction device includes 4 groups of suction nozzle assemblies, with a total of 24 suction nozzles, which can exhaust 16 first battery cells 7 at a time or exhaust 12 second battery cells 8 at a time.

[0113] Those skilled in the art may select the number of groups of the nozzle assembly 2 according to the actual application scenario and the number of nozzles in the nozzle assembly 2, and only need to ensure that the spacing between two adjacent nozzle assemblies is equal to the first spacing L1.

[0114] Two adjacent groups of nozzle assemblies 2 of the vacuum suction device can exhaust multiple battery cells of the same specification on the same battery tray, and has strong scalability.

[0115] According to some embodiments of the present application, see Figure 2The first suction nozzle 21 in the multiple suction nozzle assemblies 2 shares a first gas pipeline 31 , the second suction nozzle 22 and the sixth suction nozzle 26 share a second gas pipeline 32 , the third suction nozzle 23 and the fifth suction nozzle 24 share a third gas pipeline 33 , and the fourth suction nozzle 24 shares a fourth gas pipeline 34 .

[0116] For example, the 26 suction nozzles in the four suction nozzle assemblies 2 can be connected to the vacuum generator through four gas pipelines, so that the overall structure of the vacuum suction device is simple and compact.

[0117] According to some embodiments of the present application, see Figure 2 The vacuum suction device also includes a fixing member, which is configured to be connected to an external device, and the mounting plate is detachably mounted on the fixing member.

[0118] Among them, the external equipment refers to the formation system in the battery production system, which is used to perform formation tests on battery cells.

[0119] The fixing part can be fixedly connected to the formation system by welding, bonding, riveting or threading to facilitate the installation of the vacuum suction device. The fixing part can be a component made of a material with a certain strength such as wood, resin, metal, etc.

[0120] The mounting plate is detachably mounted on the fixing member so that the vacuum suction device can be replaced with a new one when it is damaged.

[0121] According to some embodiments of the present application, see Figures 6 to 8 ,in, Figure 6 It is a schematic diagram of the structure of the mounting plate and the fixing assembly. Figure 7 yes Figure 6 AA section view, Figure 8 It is a structural diagram of the mounting plate.

[0122] The mounting plate 1 of the present application is provided with a first slot 10 extending in the direction in which each nozzle is arranged in sequence, and a second slot 11 perpendicular to the first slot 10. A positioning pin hole (not shown in the figure) and a first threaded hole 420 are provided on the fixing member.

[0123] The fixing member and the mounting plate 1 are positioned and connected by a positioning pin 5 that passes through the first slot 10 and the positioning pin hole, and under the action of external force, the mounting plate 1 rotates around the positioning pin 5 relative to the fixing member until the fixing screw 6 passes through the second slot 11 and is connected to the fixing member through the first threaded hole 420.

[0124] The assembly process of the fixing part and the mounting plate 1 is as follows: first, insert the locating pin 5 into the locating pin hole on the fixing part, and screw part of the fixing screw 6 into the threaded hole of the fixing part, and then insert the locating pin 5 into the first slot 10 when moving the mounting plate 1; secondly, push the mounting plate 1 to rotate around the locating pin 5 until the fixing screw 6 is inserted into the second slot 11; finally, further screw the fixing screw 6 into the first threaded hole 420 of the fixing part.

[0125] The disassembly process of the fixing part and the mounting plate 1 is as follows: first, loosen the fixing screw 6; second, push the mounting plate 1 to rotate around the positioning pin 5 until the fixing screw 6 disengages from the second slot 11; finally, move the mounting plate 1 to disengage the positioning pin 5 from the first slot 10.

[0126] The vacuum suction device of the present application is quick and convenient to assemble and disassemble and has a simple structure.

[0127] According to some embodiments of this application, please continue to refer to Figures 6 to 8 , and see also Fig. 9 and Fig.10 ,in, Fig. 9 It is a schematic diagram of the structure of the positioning pin. Fig.10 yes Fig. 9 BB section structure schematic diagram.

[0128] The positioning pin 5 of the present application includes a connecting portion 50 and a limiting portion 51. The connecting portion 50 is configured to pass through the first slot 10 and be inserted into the positioning pin hole, and under the action of external force, the mounting plate 1 rotates relative to the fixing plate around the connecting portion 50 until the fixing screw 6 is inserted into the second slot 11. The fixing screw 6 is fixedly connected to the fixing member through the first threaded hole 420. The connecting portion is specifically a cylindrical rod, and the positioning pin hole is specifically a circular hole.

[0129] The limiting portion 51 is disposed on the connecting portion 50 and is configured to limit the axial movement of the mounting plate 1 relative to the fixing member along the connecting portion 50 to prevent the mounting plate 1 from axially disengaging from the connecting portion 50 along the connecting portion 50. The limiting portion 51 is specifically a cylindrical head, which is coaxial with the connecting portion 50 and has an outer diameter greater than the outer diameter of the connecting portion 50.

[0130] The positioning pin 5 of the present application has a simple structure and is easy to process.

[0131] According to some embodiments of this application, please continue to refer to Fig.10 The connecting portion 50 of the present application also has a second threaded hole 500 , and the connecting portion 50 and the fixing member are fixedly connected by bolts matched with the second threaded hole 500 .

[0132] After the mounting plate 1 is connected to the fixing member through the fixing screw 6, the connecting portion 50 and the fixing member are connected by bolts to indirectly enhance the connection strength between the mounting plate 1 and the fixing member.

[0133] According to some embodiments of this application, please continue to refer to Fig.11 and Fig.12 ,in, Fig.11 and Fig.12 They are respectively a front view structural schematic diagram and a top view structural schematic diagram of a fixed screw.

[0134] The fixing screw of the present application comprises a threaded rod 60 and a limiting head 61. The threaded rod 6 is configured to pass through the second slot 11 and be threadedly connected with the first threaded hole 420 on the fixing member.

[0135] The lower end of the threaded rod 60 is processed with an external thread, and the upper part thereof is a smooth rod. The fixing screw rod 6 cooperates with the second slot 11 through its smooth rod to prevent the thread from causing wear to the mounting plate 1.

[0136] The stopper head 61 is arranged at the end of the threaded rod 60 and is configured to press the mounting plate 1 onto the fixing member. The stopper head 61 is specifically a cylindrical head, which is coaxial with the threaded rod 60 and has an outer diameter greater than the outer diameter of the threaded rod 60, so that when the fixing screw 6 is screwed in, the stopper head 61 presses the mounting plate 1 onto the fixing member.

[0137] The fixing screw rod 6 of the present application has a simple structure and is easy to process.

[0138] According to some embodiments of this application, please continue to refer to Figure 6 and Figure 7 The fixing member of the present application includes a first fixing plate 41 and a second fixing plate 42 , the positioning pin hole is arranged on the first fixing plate 41 , and the first threaded hole 420 is arranged on the second fixing plate 42 .

[0139] The fixing part includes two separately arranged fixing plates. There is no need to consider the relative size between the positioning pin hole and the threaded hole during processing. It is only necessary to ensure that the distance between the two matches the distance between the first slot 10 and the second slot 11 on the mounting plate 1 during assembly.

[0140] The fixing part has a simple process and low manufacturing cost.

[0141] According to some embodiments of this application, see Fig.13 , which is a schematic diagram of the structure of the first nozzle and the mounting plate assembly. For better understanding, please refer to Figure 2 and Figure 5 .

[0142] The first suction nozzle 21 of the present application includes a connecting tube 210, a suction nozzle body 211, a stopper 212 and an elastic element 213. The connecting tube 210 movably penetrates the mounting plate 1, and one end of the connecting tube 210 is configured to be relatively connected to the vacuum generator through a control element; the suction nozzle body 211 is arranged on the other end of the connecting tube 210, and is configured to be connected to the cavity of the battery cell to absorb the gas in the cavity of the battery cell under negative pressure. The stopper 212 is arranged on the connecting tube 210, and the elastic element 213 is configured to press the mounting plate 1 against the stopper 212.

[0143] Among them, the connecting pipe 210 includes a first pipe fitting 2101 and a second pipe fitting 2102, and the second pipe fitting 2102 is a bent pipe. One end of the first pipe fitting 2101 is connected to the suction nozzle body 211, and the other end thereof can movably pass through the through hole 12 on the mounting plate 1. The first pipe fitting 2101 and the through hole 12 of the mounting plate 1 are clearance-matched so that the first pipe fitting 2101 can move axially relative to the mounting plate 1.

[0144] The nozzle body 211 has a conical sealing surface so that when the nozzle body 211 is inserted into the battery cell, a radial seal is formed through the conical sealing surface to prevent air leakage.

[0145] The stopper 212 is specifically a stopper ring sleeved on the first pipe 2101 or the second pipe 2102, and its outer diameter is greater than the aperture of the through hole 12. In other embodiments, the stopper may also be a pipe connector, which can connect the first pipe 2101 and the second pipe 2102, and also function as the stopper 212.

[0146] The elastic element 213 is specifically a compression spring, which is sleeved on the first tube 2101 and is configured to press the mounting plate 1 onto the limiting member 213 .

[0147] When assembling the first suction nozzle and the first battery cell 7 or the second battery cell 8, first push the suction nozzle 21 to overcome the elastic force of the elastic element 213 and lift it up, then place the first battery cell 7 or the second battery cell 8 below it, remove the external force, and the suction nozzle body 211 is sealed and connected with the first battery cell 7 or the second battery cell 8 under the elastic force of the elastic element 213, and communicates with the cavity of the first battery cell 7 or the second battery cell 8. Conversely, when the first battery cell 7 or the second battery cell 8 is removed, the suction nozzle body 2 is reset under the action of the elastic element 213.

[0148] Also, see Figure 4Since the outer dimensions of the second battery cell 8 are larger than those of the first battery cell 8, when multiple second battery cells 8 are connected to respective suction nozzles, the second battery cells 8 and some of the suction nozzles may interfere with each other. The suction nozzle of the present application can be pushed by the second battery cell 8 to be lifted to an appropriate height relative to the mounting plate 1 to avoid the second battery cell 8.

[0149] According to some embodiments of the present application, see Figures 2 to 4 The vacuum suction device of the present application includes a mounting plate 1, four groups of suction nozzle assemblies 2, a control element and a vacuum generator; wherein each group of suction nozzle assemblies 2 includes six suction nozzles arranged sequentially on the mounting plate 1, namely, a first suction nozzle 21, a second suction nozzle 22, a third suction nozzle 23, a fourth suction nozzle 24, a fifth suction nozzle 25 and a sixth suction nozzle 26, and the first spacing L1 between the first suction nozzle 21 and the second suction nozzle 22 matches the first clamping spacing, and the second spacing L2 between the first suction nozzle 21 and the third suction nozzle 23 matches the second clamping spacing. The spacing between the fourth suction nozzle 24 and the second suction nozzle 22 and the sixth suction nozzle 26 is equal and equal to the first spacing L1, and the spacing between the third suction nozzle 23 and the fifth suction nozzle 25 is equal to the second spacing L2.

[0150] Furthermore, the distance between two adjacent suction nozzle assemblies 2 in the four groups of suction nozzle assemblies 2 is equal to the first distance L1.

[0151] In this embodiment, the vacuum suction device includes four independent gas pipelines, which extend in a sequentially spaced direction of the suction nozzle and are arranged on both sides of the mounting plate 1 and are sequentially spaced in the height direction.

[0152] Among the four gas pipelines, the first gas pipeline 31 is connected to the first suction nozzle 21 of each group of suction nozzle assemblies 2, the second gas pipeline 32 is connected to the second suction nozzle 22 and the sixth suction nozzle 26 of each group of suction nozzle assemblies 2, the third gas pipeline 33 is connected to the third suction nozzle 23 and the fifth suction nozzle 25 of each group of suction nozzle assemblies 2, and the fourth gas pipeline 34 is connected to the fourth suction nozzle 24 of each group of suction nozzle assemblies 2.

[0153] The vacuum suction device can exhaust 16 first battery cells 7 or 12 second battery cells 8 at a time, and it is only necessary to disconnect or connect the vacuum generator and the corresponding gas pipeline through the control element.

[0154] For example, when the vacuum suction device exhausts 16 first battery cells 7 , the control element controls the vacuum generator to be connected to the first gas pipeline 31 , the second gas pipeline 32 and the fourth gas pipeline 34 , and controls the vacuum generator to be disconnected from the third gas pipeline 33 .

[0155] When the vacuum suction device exhausts the 12 second battery cells 8 , the control element controls the vacuum generator to be connected to both the first gas pipeline 31 and the third gas pipeline 33 , and controls the vacuum generator to be disconnected from both the third gas pipeline 33 and the fourth gas pipeline 34 .

[0156] The present application also provides a battery production system, which includes battery production equipment and a vacuum suction device arranged on the battery production equipment. The vacuum suction device is specifically the vacuum suction device described above, and the vacuum suction device is constructed to be used for exhausting battery cells of different specifications.

[0157] The battery production equipment at least includes a battery formation equipment to perform formation tests on battery cells. Of course, the battery production system also includes other existing equipment on the battery cell production line.

[0158] It can be understood that the battery production system has all the technical features of the aforementioned vacuum suction device, as well as the corresponding technical effects, which can be obtained without doubt by those skilled in the art based on the foregoing records and will not be elaborated herein.

[0159] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A vacuum suction device, characterized in that: include: Mounting plate; At least one group of nozzle assemblies, wherein at least one group of nozzle assemblies comprises at least three nozzles, and the at least three nozzles are sequentially spaced and arranged on the mounting plate; The distance between the first suction nozzle and the second suction nozzle of the at least three suction nozzles is recorded as the first distance, and the distance between the first suction nozzle and the third suction nozzle is recorded as the second distance, wherein the first distance is used to match the first clamping position distance, and the second distance is matched with the second clamping position distance; A control element is configured to control the connection or disconnection of the vacuum generator with the first suction nozzle, the second suction nozzle and the third suction nozzle respectively.

2. The vacuum suction device according to claim 1, characterized in that: The nozzle assembly includes six nozzles, wherein the spacing between the second nozzle and the fourth nozzle, and the spacing between the fourth nozzle and the sixth nozzle are equal to the first spacing, and the spacing between the third nozzle and the fifth nozzle is equal to the second spacing.

3. The vacuum suction device according to claim 1, characterized in that: The vacuum suction device comprises a plurality of groups of suction nozzle assemblies, and the plurality of groups of suction nozzle assemblies are sequentially arranged on the mounting plate at intervals.

4. The vacuum suction device according to claim 1, characterized in that: The vacuum suction device comprises 4 groups of suction nozzle assemblies.

5. The vacuum suction device according to claim 1, characterized in that: The vacuum suction device also includes at least three gas pipelines that are independent of each other. The at least three gas pipelines connect the vacuum generator to the first suction nozzle, the second suction nozzle, and the third suction nozzle respectively through the control element.

6. The vacuum suction device according to any one of claims 1 to 5, characterized in that: The nozzle assembly includes six nozzles, wherein the spacing between the second nozzle and the fourth nozzle, and the spacing between the fourth nozzle and the sixth nozzle are equal to the first spacing, and the spacing between the third nozzle and the fifth nozzle is equal to the second spacing; The vacuum suction device includes four independent gas pipelines, the first gas pipeline is connected to the first suction nozzle, the second gas pipeline is connected to the second suction nozzle and the sixth suction nozzle, the third gas pipeline is connected to the third suction nozzle and the fifth suction nozzle, and the fourth suction nozzle is connected to the fourth gas pipeline.

7. The vacuum suction device according to claim 6, characterized in that: The four gas pipelines all extend along the direction in which the six suction nozzles are sequentially arranged. The four gas pipelines are arranged on both sides of the mounting plate and are sequentially spaced in the height direction.

8. The vacuum suction device according to claim 6, characterized in that: The vacuum suction device comprises a plurality of groups of suction nozzle assemblies, and the plurality of groups of suction nozzle assemblies are sequentially arranged on the mounting plate at intervals, and the spacing between two adjacent groups of suction nozzle assemblies is equal to the first spacing.

9. The vacuum suction device according to claim 8, characterized in that: The first suction nozzles in the plurality of suction nozzle assemblies share a first gas pipeline, the second suction nozzle and the sixth suction nozzle share a second gas pipeline, the third suction nozzle and the fifth suction nozzle share a third gas pipeline, and the fourth suction nozzle shares a fourth gas pipeline.

10. The vacuum suction device according to any one of claims 1 to 5, characterized in that: The vacuum suction device further includes a fixing member, which is configured to be connected to an external device, and the mounting plate is detachably mounted on the fixing member.

11. The vacuum suction device according to claim 10, characterized in that: The mounting plate is provided with a first slot extending along a direction in which the suction nozzles are arranged in sequence and at intervals, and a second slot perpendicular to the first slot; The fixing member is provided with a positioning pin hole and a first threaded hole; The fixing member and the mounting plate are positioned and connected by a positioning pin that passes through the first slot and the positioning pin hole, and under the action of external force, the mounting plate rotates around the positioning pin relative to the fixing member until the fixing screw passes through the second slot and is connected to the fixing member through the first threaded hole.

12. The vacuum suction device according to claim 11, characterized in that: The positioning pin comprises: A connecting portion, the connecting portion being configured to pass through the first slot and be inserted into the positioning pin hole, and the mounting plate rotates relative to the fixing member around the connecting portion under the action of an external force; A limiting portion is provided on the connecting portion and is configured to limit the movement of the mounting plate relative to the fixing member along the axial direction of the connecting portion.

13. The vacuum suction device according to claim 12, characterized in that: The connecting portion also has a second threaded hole, and the connecting portion and the fixing member are fixedly connected by a bolt matched with the second threaded hole.

14. The vacuum suction device according to claim 11, characterized in that: The fixing screw comprises: a threaded rod, the threaded rod being configured to pass through the second slot and be threadedly connected to the first threaded hole; A limit head is arranged at the end of the threaded rod and is configured to press the mounting plate onto the fixing member.

15. The vacuum suction device according to claim 11, characterized in that: The fixing member includes a first fixing plate and a second fixing plate, the positioning pin hole is arranged on the first fixing plate, and the first threaded hole is arranged on the second fixing plate.

16. The vacuum suction device according to any one of claims 1 to 5, characterized in that: The nozzle comprises: A connecting pipe, the connecting pipe movably penetrates the mounting plate, and one end of the connecting pipe is configured to be relatively connected to the vacuum generator through the control element; A nozzle body, the nozzle body being arranged at the other end of the connecting pipe; A limiting member, wherein the limiting member is arranged on the connecting pipe; An elastic element is configured to press the mounting plate against the limiting member.

17. A battery production system, characterized in that: The battery production system includes battery production equipment and a vacuum suction device arranged on the battery production equipment, and the vacuum suction device includes the vacuum suction device according to any one of claims 1 to 16.

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