Downward pressing mechanism, pressurizing device and battery production equipment

Abstract

The invention discloses a pressing mechanism, a pressurizing device and battery production equipment. The downward pressing mechanism comprises a pitch changing unit and a plurality of downward pressing pieces, the pitch changing unit comprises a base plate and a plurality of pitch changing pieces sequentially arranged on the base plate in the first direction, and at least one pitch changing piece can move in the first direction; each pressing piece is connected to the corresponding pitch changing piece and used for pressing the product.

Description

Pressing mechanism, pressurizing device and battery production equipment Technical Field

[0001] The present application relates to the field of battery manufacturing technology, and in particular to a pressing mechanism, a pressurizing device and battery production equipment. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the transportation industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the transportation industry. For electric vehicles, battery technology is a crucial factor in their development.

[0003] During the battery manufacturing process, the battery cells need to be heated in a static state. This process requires that the batteries remain stationary and prevent displacement or movement. Currently, a pressing mechanism is typically used to press the tops of the battery cells. This pressing mechanism consists of multiple pressing members capable of pressing a row of battery cells. However, traditional pressing mechanisms are typically only suitable for one specification of battery cells, resulting in poor compatibility.

[0004] Summary of the Invention

[0005] In view of the above problems, the present application provides a pressing mechanism, a pressurizing device and a battery production equipment, which can adjust the spacing of the pressing parts in the pressing mechanism and improve the compatibility of the pressing mechanism.

[0006] An embodiment of the first aspect of the present application proposes a pressing mechanism, including a variable distance unit and multiple pressing members, the variable distance unit including a substrate and multiple variable distance members arranged in sequence on the substrate along a first direction, at least one variable distance member can move along the first direction; each pressing member is respectively connected to a corresponding variable distance member, and the pressing member is used to press the product.

[0007] The pressing mechanism provided in the embodiment of the present application includes a distance-adjusting assembly and multiple pressing parts. The distance-adjusting assembly includes a substrate and multiple distance-changing parts arranged in sequence on the substrate along a first direction. Since at least one distance-changing part can move along the first direction, the pressing part connected to the distance-changing part can also move along the first direction to adjust the spacing between adjacent pressing parts. Therefore, the pressing mechanism can adjust the spacing between the pressing parts to adapt to products of different specifications, thereby improving the compatibility of the pressing mechanism and avoiding the problems of low efficiency and increased cost caused by the need to replace the pressing mechanism when changing the wire drawing type.

[0008] In some embodiments, the distance-changing unit further includes a distance-adjusting drive assembly disposed on a substrate, at least one distance-changing member is slidably connected to the substrate, and the distance-adjusting drive assembly is used to drive at least one distance-changing member to move along a first direction.

[0009] By adopting the above technical solution, at least one distance-changing member can slide along the base plate under the drive of the distance-adjusting drive assembly, and the degree of automation is relatively high.

[0010] In some embodiments, the pitch adjustment drive assembly includes a screw rod provided on a base plate and extending along a first direction and a rotating drive member connected to the screw rod; at least one threaded portion is provided on the outer peripheral surface of the screw rod, and at least one pitch changing member is transmission-connected to the threaded portion, and the rotating drive member is used to drive the screw rod to rotate, so as to drive the pitch changing member to move along the first direction.

[0011] By adopting the above technical solution, the pitch-adjusting drive assembly drives the pitch-changing member to slide through the screw rod, which has a simple structure and is easy to use.

[0012] In some embodiments, the screw rod is provided with multiple threaded portions, and the multiple distance-changing members are respectively connected to a corresponding threaded portion in a transmission manner. The screw rod can simultaneously drive the multiple distance-changing members to slide along the first direction.

[0013] By adopting the above technical solution, the distance adjustment drive assembly can simultaneously drive multiple distance changing members to slide, so as to synchronously adjust the distance between the multiple distance changing members. The adjustment efficiency is high, the structure is simple, and the driving is convenient.

[0014] In some embodiments, the screw includes a first section and a second section respectively arranged on both sides of a reference surface, and the reference surface is a cross-section of the screw; the multiple threaded portions include at least one first threaded portion arranged on the first section and at least one second threaded portion arranged on the second section, and the rotation directions of the first threaded portion and the second threaded portion are opposite.

[0015] By adopting the above technical solution, on the one hand, a larger number of pitch-changing members can be provided on the screw rod; on the other hand, the time required for pitch-changing adjustment is shorter, and the distances moved by the various pressing members are more balanced.

[0016] In some embodiments, there are multiple first thread portions, and the leads of the multiple first thread portions increase in a direction away from the second segment, and / or, there are multiple second thread portions, and the leads of the multiple second thread portions increase in an arithmetic progression in a direction away from the first segment.

[0017] By adopting the above technical solution, the multiple distance-changing members connected to the first section can all move along the first direction, and there are equal intervals between the multiple distance-changing members.

[0018] In some embodiments, the leads of the plurality of first thread portions increase in an arithmetic progression along a direction away from the second segment; and / or, the leads of the plurality of second thread portions increase in an arithmetic progression along a direction away from the first segment.

[0019] By adopting the above technical solution, after the distance is adjusted, the multiple distance-changing members have equal spacing, and the multiple pressing members can respectively press and hold multiple products of the same specification.

[0020] In some embodiments, the first threaded portion and the second threaded portion are symmetrically arranged relative to a reference plane.

[0021] By adopting the above technical solution, a large number of threaded parts and pitch-changing parts can be set on the screw rod. The rotation of the screw rod can drive the pitch-changing parts on both sides to move simultaneously, and the distance between the pitch-changing parts and the pressing parts can be quickly adjusted.

[0022] In some embodiments, one of the distance-changing members is located between the first threaded portion and the second threaded portion and is mounted on the lead screw via a bearing, and the remaining distance-changing members are slidably connected to the lead screw.

[0023] By adopting the above technical solution, one of the distance changing parts is the central reference part and does not need to move along the first direction. The setting of the central reference part can reasonably utilize the space on the screw rod, the distance changing unit structure is compact, and the distance adjustment speed of the entire distance changing unit is faster.

[0024] In some embodiments, the rotation directions of the multiple threaded portions are the same; along the axial direction of the screw rod, the leads of the multiple threaded portions increase in an arithmetic progression.

[0025] By adopting the above technical solution, the distance-changing unit can also adjust the distance between the pressing parts with high distance adjustment accuracy.

[0026] In some embodiments, the threaded portion is a spiral groove extending around the axial thread of the screw rod, one side of the pitch changing member is inserted into the corresponding spiral groove, and the other side of the pitch changing member is connected to the pressing member.

[0027] By adopting the above technical solution, the pitch-changing member can slide along the base plate as the lead screw rotates. The movement process of the pitch-changing member is smooth, not prone to shaking, and has high movement accuracy.

[0028] In some embodiments, the pressing mechanism also includes a mounting seat and a pressing drive assembly, and the substrate is slidably connected to the mounting seat; the pressing drive assembly is arranged on the mounting seat, and the pressing drive assembly is used to drive the variable distance unit to slide on the mounting seat so that the pressing member is pressed against the product.

[0029] By adopting the above technical solution, the downward pressing drive assembly can drive the variable pitch unit and multiple downward pressing parts to move up and down as a whole, thereby realizing the downward pressing process of the product.

[0030] In some embodiments, the downward driving assembly includes a downward driving member and a connecting member connected to the downward driving member. The downward driving member is arranged on the side of the mounting seat away from the downward driving member and the variable pitch unit. The connecting member passes through the mounting seat and is connected to the substrate.

[0031] By adopting the above technical solution, the pressing driving member can drive the substrate to descend without causing any obstruction to the pressing path of the pressing member.

[0032] In some embodiments, the pressing member includes a mounting member fixedly connected to the distance-changing member and a holding member connected to the mounting member.

[0033] By adopting the above technical solution, the shape of the pressing member can be flexibly designed according to the product to be pressed.

[0034] In some embodiments, a mounting hole is provided on the mounting member, and the holding member is movably inserted into the mounting hole; an elastic member is sleeved on the holding member, and two ends of the elastic member respectively abut against the mounting member and the holding member.

[0035] By adopting the above technical solution, the elastic member can play a certain buffering role for the downward pressing action of the pressing member, which can not only ensure that the pressing member contacts the product, but also prevent the pressing member from damaging the product due to excessive pressure.

[0036] An embodiment of the second aspect of the present application provides a pressurizing device, comprising the pressing mechanism provided in the first aspect.

[0037] The pressurizing device provided in the present application is applicable to battery cells of various specifications. There is no need to disassemble and replace the pressing mechanism when the battery cell is changed. The operation is simple, the production efficiency of the pressing process is improved, and the production cost is reduced.

[0038] In some embodiments, the pressurizing device further includes a bottom plate, and the pressing mechanism is slidably connected to the bottom plate along a second direction, where the second direction is perpendicular to the first direction.

[0039] By adopting the above technical solution, the pressing mechanism can slide along the second direction, so that the pressing mechanism can approach or move away from the battery cell, and the degree of automation is high.

[0040] In some embodiments, the pressurizing device further includes a side pressure mechanism provided on one side of the downward pressure mechanism, and the side pressure mechanism and the downward pressure mechanism are respectively used to press different sides of the product.

[0041] An embodiment of the third aspect of the present application provides a battery production device, comprising the pressurizing device provided in the second aspect.

[0042] 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

[0043] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0044] FIG1 is an exploded view of a battery according to some embodiments of the present application;

[0045] FIG2 is a front view of a pressing mechanism provided in some embodiments of the present application;

[0046] FIG3 is a top view of the pressing mechanism shown in FIG2 ;

[0047] FIG4 is a partial enlarged view of portion A of the pressing mechanism shown in FIG2 ;

[0048] FIG5 is a schematic diagram of the structure of a screw rod provided in some embodiments of the present application;

[0049] FIG6 is a perspective schematic diagram of a mounting base provided in some embodiments of the present application;

[0050] FIG7 is a perspective schematic diagram of a mounting base and a downward driving assembly provided in some embodiments of the present application;

[0051] FIG8 is a perspective schematic diagram of a pressing member provided in some embodiments of the present application;

[0052] FIG9 is a perspective schematic diagram of a pressurizing device provided in some embodiments of the present application.

[0053] The accompanying drawings in the specific implementation manner are as follows:

[0054] 1000, pressurizing device; 100, downward pressing mechanism; 200, bottom plate; 300, side pressing mechanism;

[0055] 10. Pitch-changing unit; 11. Base plate; 12. Pitch-changing member; 13. Pitch-adjusting drive assembly; 131. Lead screw; 1311. First section; 1312. Second section; 1313. Threaded portion; 1313a. First threaded portion; 1313b. Second threaded portion; 132. Rotary drive member;

[0056] 20. Pressing member; 21. Mounting member; 211. Mounting hole; 22. Pressing member; 23. Elastic member;

[0057] 30. Mounting seat; 31. Slide rail;

[0058] 40. Downward pressure drive assembly; 41. Downward pressure drive member; 42. Connecting member;

[0059] 500, battery; 510, housing; 511, first part; 512, second part; 520, battery module; 521, battery cell. DETAILED DESCRIPTION

[0060] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art 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" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0062] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0063] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0064] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0065] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0066] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0067] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0068] During the battery manufacturing process, the battery cells need to be heated in a static state. This process requires that the batteries remain stationary and prevent displacement or movement. Currently, a pressing mechanism is typically used to press the tops of the battery cells. This pressing mechanism consists of multiple pressing members capable of pressing a row of battery cells. However, traditional pressing mechanisms are typically only suitable for one specification of battery cells, resulting in poor compatibility.

[0069] Research has found that the spacing between the pressing parts in the traditional pressing mechanism is fixed and is only applicable to battery cells of one thickness. For battery cells of different specifications, the corresponding pressing mechanism needs to be replaced, which results in low operating efficiency and high production costs.

[0070] In view of this, the present application provides a pressing mechanism, a pressurizing device and a battery production equipment, wherein the pressing mechanism includes a variable distance unit and a plurality of pressing members. The variable distance unit includes a substrate and a plurality of variable distance members arranged in sequence on the substrate along a first direction, at least one variable distance member being able to move along the first direction; each pressing member is respectively connected to a corresponding variable distance member, and the pressing member is used to press the product. Since at least one variable distance member is able to move along the first direction, the pressing member connected to the variable distance member is also able to move along the first direction to adjust the spacing between adjacent pressing members. In this way, the pressing mechanism can adjust the spacing between the pressing members to adapt to products of different specifications, thereby avoiding the problem of low efficiency and increased cost caused by the need to replace the pressing mechanism when the wire is changed.

[0071] The pressing mechanism provided in the embodiment of the present application is used to press the battery cell. The pressing mechanism disclosed in the embodiment of the present application can be used in the heating and static process of the battery cell and other processes that require pressing the battery cell.

[0072] Batteries can be used in a variety of electrical devices, including but not limited to mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, and so on. Electric toys can include fixed or mobile electric toys, such as game consoles, electric cars, electric ships, and electric airplanes. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft. For example, if the electrical device is a vehicle, the battery can serve as both the vehicle's operating power source and its driving power source, replacing or partially replacing fuel or natural gas to provide the vehicle's driving power.

[0073] Please refer to Figure 1, which is a perspective exploded view of a battery provided in some embodiments of the present application. Battery 500 includes a housing 510 and a battery cell 521, with battery cell 521 housed within housing 510. Housing 510 is used to provide storage space for battery cell 521, and housing 510 can have various structures. In some embodiments, housing 510 can include a first portion 511 and a second portion 512, which overlap with each other and together define a storage space for battery cell 521. Second portion 512 can be a hollow structure with one end open, and first portion 511 can be a plate-like structure, overlapping the open side of second portion 512, so that the first and second portions 511, 512 together define a storage space. Alternatively, first portion 511 and second portion 512 can each be a hollow structure with one end open, with the open side of first portion 511 overlapping the open side of second portion 512. Of course, the box body 510 formed by the first part 511 and the second part 512 can be in various shapes, such as a cylinder, a cuboid, etc.

[0074] In the battery 500, there may be multiple battery cells 521, which may be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel connections within the multiple battery cells 521. The multiple battery cells 521 may be directly connected in series, in parallel, or in a hybrid configuration, and then the entire structure formed by the multiple battery cells 521 may be housed within the housing 510. Alternatively, the battery 500 may comprise multiple battery cells 521 first connected in series, in parallel, or in a hybrid configuration to form a battery module 520, which is then further connected in series, in parallel, or in a hybrid configuration to form a single structure housed within the housing 510. The battery 500 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 521.

[0075] Each battery cell 521 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 521 can be cylindrical, flat, rectangular, or in other shapes.

[0076] A battery cell 521 is the smallest unit that makes up a battery. It includes an outer casing, an electrode assembly, and an electrolyte, both of which are contained within the outer casing. The outer casing may include a housing with an opening and an end cap, which fits over the opening of the housing to isolate the internal environment of the battery cell from the external environment. The end cap may be provided with functional components such as electrode terminals. The end cap may also be provided with a pressure relief mechanism to release internal pressure when the internal pressure or temperature of the battery cell 521 reaches a threshold. The outer casing can be of various shapes and sizes, such as rectangular, cylindrical, or hexagonal, and can be made of a variety of materials, including, but not limited to, copper, iron, aluminum, stainless steel, and aluminum alloys. The electrode assembly is the component within the battery cell 521 where the electrochemical reaction occurs. The outer casing may contain one or more electrode assemblies.

[0077] The first embodiment of the present application provides a pressing mechanism for pressing a product. This embodiment uses a battery cell as an example. Multiple battery cells are arranged in parallel, and the pressing mechanism can simultaneously press down multiple battery cells. It is understood that the pressing mechanism can also be used to press other products.

[0078] Referring to Figures 2 to 4 , the pressing mechanism 100 includes a variable pitch unit 10 and multiple pressing members 20. The variable pitch unit 10 includes a base plate 11 and multiple variable pitch members 12 arranged sequentially along a first direction X on the base plate 11, with at least one variable pitch member 12 capable of moving along the first direction. Each pressing member 20 is connected to a corresponding variable pitch member 12 and is used to press the product.

[0079] The base plate 11 provides a secure base for the pitch-changing member 12 and the pressing member 20. The base plate 11 is a rigid structure and can be made of any material, such as metal or plastic, as long as it provides sufficient strength. The shape of the base plate 11 is not particularly limited, as long as it provides a mounting position for the pitch-changing member 12. Examples include an elongated plate, an L-shaped elongated plate, or a hollow cylindrical structure.

[0080] The distance-changing members 12 are rigid structures and are sequentially arranged on the substrate 11 along a first direction X, which may be the length of the substrate 11. At least one distance-changing member 12 can move along the first direction to change the spacing between the distance-changing members 12.

[0081] Optionally, the spacing between each pair of distance-varying members 12 changes synchronously and remains equal, allowing multiple pressing members 20 to press multiple products of the same specifications. For example, the multiple distance-varying members 12 can all move along the first direction to synchronously change the distance between each pair of adjacent distance-varying members 12. Alternatively, the position of an outermost distance-varying member 12 or a middle distance-varying member 12 on the substrate 11 remains unchanged, while the remaining distance-varying members 12 can all move along the first direction, also synchronously changing the distance between each pair of adjacent distance-varying members 12.

[0082] The pressing member 20 is connected to the distance-variable member 12 and can move with the distance-variable member 12 in the first direction X to adjust the spacing between the pressing members 20. The pressing member 20 can be rigid or flexible. Its shape and size are not detailed here; they can be used to achieve downward pressure on the battery cell. Optionally, the pressing member 20 is used to press the terminal post at the top of the battery cell.

[0083] During use, each pressing member 20 is connected to a distance-variable member 12. When the spacing between the pressing members 20 needs to be adjusted, at least one distance-variable member 12 is moved along the first direction on the substrate 11 to change the spacing between the moved distance-variable member 12 and its adjacent pressing member 20. The pressing members 20 can move with the distance-variable members 12, thereby adjusting the spacing between the pressing members 20. For example, in the case of battery cells, different specifications may have different thicknesses. By adjusting the spacing between the pressing members 20, the pressing mechanism 100 can adapt to new product specifications, avoiding the inefficiency and increased costs associated with replacing the pressing mechanism 100 when changing wire types.

[0084] The pressing mechanism 100 provided in the embodiment of the present application includes a distance-adjusting component and a plurality of pressing members 20. The distance-adjusting component includes a substrate 11 and a plurality of distance-changing members 12 arranged in sequence along a first direction on the substrate 11. Since at least one distance-changing member 12 can move along the first direction, the pressing member 20 connected to the distance-changing member 12 can also move along the first direction to adjust the spacing between adjacent pressing members 20. Therefore, the pressing mechanism 100 can adjust the spacing between the pressing members 20 to adapt to products of different specifications, thereby improving the compatibility of the pressing mechanism 100 and avoiding the problems of low efficiency and increased cost caused by the need to replace the pressing mechanism 100 when the wire drawing is changed.

[0085] In some embodiments, the distance-changing unit 10 further includes a distance-adjusting drive assembly 13 disposed on the substrate 11 , at least one distance-changing member 12 is slidably connected to the substrate 11 , and the distance-adjusting drive assembly 13 is used to drive at least one distance-changing member 12 to slide along the first direction X.

[0086] The distance changing member 12 is slidably connected to the base plate 11, so that the distance changing member 12 can slide along the first direction without being deflected during movement. For example, the base plate 11 is provided with a guide structure such as a guide rail or a slide groove, and the distance changing member 12 slides in cooperation with the guide structure.

[0087] The pitch-adjusting drive assembly 13 is disposed on the base plate 11 and connected to the pitch-changing member 12. The pitch-adjusting drive assembly 13 is configured to drive the pitch-changing member 12 to slide along the base plate 11, thereby enabling the pressing mechanism 100 to automatically adjust the position of the pitch-changing member 12 in the first direction. The pitch-adjusting drive assembly 13 can be connected to at least one pitch-changing member 12 or multiple pitch-changing members 12 simultaneously.

[0088] By adopting the above technical solution, at least one distance-changing member 12 can slide along the base plate 11 under the drive of the distance-adjusting driving assembly 13 , and the degree of automation is relatively high.

[0089] Referring to Figures 2 and 5, in some embodiments, the pitch adjustment drive assembly 13 includes a screw rod 131 provided on the base plate 11 and extending along the first direction X, and a rotating drive member 132 connected to the screw rod 131; at least one threaded portion 1313 is provided on the outer circumference of the screw rod 131, and at least one pitch changing member 12 is transmission-connected to the threaded portion 1313. The rotating drive member 132 is used to drive the screw rod 131 to rotate, thereby driving the pitch changing member 12 to move along the first direction X.

[0090] The axial direction of the screw rod 131 is parallel to the longitudinal direction of the base plate 11, and the screw rod 131 can rotate on the base plate 11 around its axial direction. The rotary drive member 132 can include a drive motor, as long as it can drive the screw rod 131 to rotate. In this embodiment, the rotary drive member 132 and the screw rod 131 are both provided on the base plate 11.

[0091] At least one threaded portion 1313 is provided on the outer circumference of the screw rod 131, and at least one pitch changing member 12 is in transmission connection with a corresponding threaded portion 1313. For example, in some embodiments, the screw rod 131 is provided with multiple threaded portions 1313 along its axial direction, and each threaded portion 1313 is in transmission connection with a pitch changing member 12. The threaded portion 1313 can be a spiral groove, in which case the pitch changing member 12 is provided with a guide portion that can be inserted into the spiral groove to ensure transmission connection between the pitch changing member 12 and the threaded portion 1313. The threaded portion 1313 can also be a threaded structure, in which case the pitch changing member 12 is provided with a threaded structure that meshes with the threaded portion 1313, similarly ensuring transmission connection between the pitch changing member 12 and the threaded portion 1313.

[0092] Since the distance changing member 12 is connected to the base plate 11 in a sliding manner along the first direction, when adjusting the distance, the rotary driving member 132 drives the screw rod 131 to rotate, and the distance changing member 12 in transmission connection with the threaded portion 1313 can slide along the first direction.

[0093] By adopting the above technical solution, the pitch-adjusting drive assembly 13 drives the pitch-changing member 12 to slide through the screw rod 131 , which has a simple structure and is easy to use.

[0094] In some embodiments, the screw rod 131 is provided with multiple threaded portions 1313 , and the multiple distance-changing members 12 are respectively connected to the corresponding threaded portions 1313 . The screw rod 131 can simultaneously drive the multiple distance-changing members 12 to slide along the first direction X.

[0095] If the threaded portions 1313 have the same rotation direction, the screw rod 131 can drive the multiple distance-changing members 12 to slide in the same direction; if the threaded portions 1313 have opposite rotation directions, the screw rod 131 can drive the two sets of distance-changing members 12 to slide in opposite directions.

[0096] By adopting the above technical solution, the distance adjustment drive assembly 13 can simultaneously drive multiple distance changing members 12 to slide, so as to synchronously adjust the distance between the multiple distance changing members 12. The adjustment efficiency is high, the structure is simple, and the driving is convenient.

[0097] In some embodiments, the screw rod 131 includes a first section 1311 and a second section 1312 respectively arranged on both sides of a reference plane R, where the reference plane R is a cross-section of the screw rod 131; the plurality of threaded portions 1313 include at least one first threaded portion 1313a arranged on the first section 1311 and at least one second threaded portion 1313b arranged on the second section 1312, and the rotation directions of the first threaded portion 1313a and the second threaded portion 1313b are opposite.

[0098] The reference plane R is a virtual plane and can be located in the middle of the screw rod 131. For example, the reference plane R can be located at the midpoint of the screw rod 131. Of course, the reference plane can also be located at other positions on the screw rod 131. The reference plane R is a cross-section of the screw rod 131, that is, the reference plane R is perpendicular to the axial direction of the screw rod 131.

[0099] In this embodiment, the screw rod 131 is divided into a first section 1311 and a second section 1312 by a reference plane R. The threads on the first section 1311 and the second section 1312 have opposite rotation directions. Therefore, when the screw rod 131 rotates, the pitch-changing members 12 on the first section 1311 and the second section 1312 move in opposite directions. For example, when the pitch of the pitch-changing members 12 needs to be increased, the pitch-changing members 12 connected to the first threaded portion 1313a and the pitch-changing members 12 connected to the second threaded portion 1313b are respectively moved away from the reference plane. When the pitch of the pitch-changing members 12 needs to be decreased, the pitch-changing members 12 connected to the first threaded portion 1313a and the pitch-changing members 12 connected to the second threaded portion 1313b are respectively moved toward the reference plane.

[0100] By adopting the above technical solution, on the one hand, a larger number of pitch-changing members 12 can be provided on the screw rod 131; on the other hand, the time required for pitch-changing adjustment is shorter, and the moving distances of the various pressing members 20 are more balanced.

[0101] In other embodiments, the pitch-changing unit 10 may be provided with two parallel screw rods 131 , and the threaded portions on the two screw rods 131 rotate in opposite directions, so that the pitch-changing member 12 connected to the two screw rods 131 will also move in opposite directions.

[0102] In some embodiments, there are multiple first thread portions 1313a, and the leads of the multiple first thread portions 1313a increase in the direction away from the second section 1312; and / or, there are multiple second thread portions 1313b, and the leads of the multiple second thread portions 1313b increase in the direction away from the first section 1311.

[0103] The lead of a thread refers to the axial distance that any point on the thread moves when it rotates one circle along the same spiral line. When turning a thread, the distance that the tool moves along the axial direction when the workpiece rotates one circle is the lead, that is, the axial distance between the corresponding two points on the mid-diameter line of two adjacent teeth on the same spiral line.

[0104] Specifically, as the lead of the multiple first threaded portions 1313a gradually increases away from the second section 1312, the movement distance of the distance-changing members 12 connected to the multiple first threaded portions 1313a also gradually increases. As the lead of the multiple second threaded portions 1313b gradually increases away from the first section 1311, the movement distance of the distance-changing members 12 connected to the multiple second threaded portions 1313b also gradually increases. By employing this technical solution, the multiple distance-changing members 12 connected to the first section 1311 can all move in the first direction, and the multiple distance-changing members 12 connected to the second section 1312 can also move in the first direction, thereby simultaneously adjusting the distance between the multiple distance-changing members 12.

[0105] In some embodiments, the leads of the plurality of first thread portions 1313 a increase in an arithmetic progression in a direction away from the second segment 1312 ; and / or, the leads of the plurality of second thread portions 1313 b increase in an arithmetic progression in a direction away from the first segment 1311 .

[0106] Specifically, the pitches between the first thread portions 1313a are in an arithmetic progression, and the moving distances of the variable distance members 12 respectively connected to the plurality of first thread portions 1313a also change in an arithmetic progression, so that the plurality of variable distance members 12 always maintain equal spacing.

[0107] The leads between the second thread portions 1313b are in an arithmetic progression, and the moving distances of the distance-changing members 12 respectively connected to the plurality of second thread portions 1313b also change in an arithmetic progression, so that the plurality of distance-changing members 12 always maintain equal spacing.

[0108] By adopting the above technical solution, after the distance adjustment, the multiple distance-changing members 12 still have equal spacing, and the multiple pressing members 20 can respectively press and hold multiple battery cells of the same specification.

[0109] In some embodiments, the first threaded portion 1313a and the second threaded portion 1313b are symmetrically arranged with respect to a reference plane.

[0110] Specifically, there are multiple first threaded portions 1313a and an equal number of second threaded portions 1313b. The leads of the multiple first threaded portions 1313a form a first arithmetic progression, and the leads of the multiple second threaded portions 1313b form a second arithmetic progression. The tolerance of the first arithmetic progression is equal to the tolerance of the second arithmetic progression. The distance from the first threaded portion 1313a closest to the reference plane R to the reference plane is equal to the distance from the second threaded portion 1313b closest to the reference plane R to the reference plane.

[0111] By adopting the above technical solution, a large number of threaded parts and distance changing parts 12 can be set on the screw rod 131. The rotation of the screw rod 131 can drive the distance changing parts 12 on both sides to move simultaneously, and quickly adjust the distance between the distance changing parts 12 and the pressing part 20.

[0112] In some embodiments, one of the distance-changing members 12 is located between the first threaded portion 1313 a and the second threaded portion 1313 b and is fixed on the base plate 11 , and the remaining distance-changing members 12 are slidably connected to the base plate 11 .

[0113] As shown in Figure 5, the screw rod 131 is provided with an annular groove, which is arranged around the circumference of the screw rod 131 and is located between the first threaded portion 1313a and the second threaded portion 1313b. Reference surface R is a cross-section of the annular groove. The distance between the annular groove and the first threaded portion 1313a closest to the reference surface is equal to the distance between the annular groove and the second threaded portion 1313b closest to the reference surface. Referring to Figures 3 and 5, one of the pitch-changing members 12 is mounted on the annular groove via a bearing. This pitch-changing member 12 does not move with the rotation of the screw rod 131; the remaining pitch-changing members 12 are respectively connected to the first threaded portion 1313a or the second threaded portion 1313b and are slidably connected to the base plate 11. It will be understood that the annular groove can be omitted, as long as the center pitch-changing member 12 can be fixed to the base plate 11.

[0114] When adjusting the distance, one distance-changing member 12 is fixed on the base plate 11, and the remaining distance-changing members 12 are respectively arranged on both sides of the reference surface and move in opposite directions. The moving distance of the distance-changing members on each side of the reference surface increases in an arithmetic progression. After adjustment, the distance between every two adjacent distance-changing members 12 is equal.

[0115] By adopting the above technical solution, one of the distance changing parts 12 is the central reference part and does not need to move along the first direction. The setting of the central reference part can reasonably utilize the space on the screw rod 131, the distance changing unit 10 has a compact structure, and the distance adjustment speed of the entire distance changing unit 10 is faster.

[0116] In other embodiments, each distance-changing member 12 may be slidably connected to the base plate 11 , and synchronous distance adjustment may also be achieved.

[0117] In other embodiments, the multiple threaded portions have the same rotation direction, and the pitch of the multiple threaded portions increases in an arithmetic progression along the axial direction of the screw rod 131. As the screw rod 131 rotates, the travel distances of the multiple distance-changing members 12 also increase in an arithmetic progression, ensuring that the distances between the distance-changing members 12 are equal after adjustment. The spacing between the multiple pressing members 20 is also equal, facilitating downward pressure on a row of battery cells.

[0118] Optionally, a distance-changing member 12 connected to the outermost end of the screw rod 131 is a reference member, which is fixed on the base plate 11 , and the remaining distance-changing members 12 are respectively transmission-connected to a corresponding threaded portion.

[0119] By adopting the above technical solution, the distance-changing unit 10 can also adjust the distance between the pressing members 20 with high distance adjustment accuracy.

[0120] In some embodiments, the threaded portion is a spiral groove extending around the axial thread of the screw rod 131 , one side of the pitch changing member 12 is inserted into the corresponding spiral groove, and the other side of the pitch changing member 12 is connected to the pressing member 20 .

[0121] The pitch-changing member 12 can be in the shape of a slider, with the side of the pitch-changing member 12 facing the screw rod 131 inserted into the corresponding spiral groove. For example, a ball bearing is provided on the side of the pitch-changing member 12 facing the screw rod 131, and the ball bearing is slidably received in the spiral groove. Furthermore, the side of the pitch-changing member 12 facing the screw rod 131 is also slidably connected to a guide structure on the base plate 11. Alternatively, the ball bearing is provided in the middle of the pitch-changing member 12, and both sides of the pitch-changing member 12 along the width direction are slidably connected to the guide rails on the base plate 11.

[0122] The side of the distance changing member 12 facing away from the screw rod 131 can be connected to the pressing member 20 by fasteners such as screws. Of course, the distance changing member 12 can also be connected to the pressing member 20 by welding or other means.

[0123] By adopting the above technical solution, the distance changing member 12 can slide along the base plate 11 as the lead screw 131 rotates. The movement process of the distance changing member 12 is smooth, not easy to shake, and has high movement accuracy.

[0124] Please refer to Figures 2, 6, and 7. In some embodiments, the pressing mechanism 100 also includes a mounting seat 30 and a pressing drive assembly 40, and the substrate 11 is slidably connected to the mounting seat 30; the pressing drive assembly 40 is provided on the mounting seat 30, and the pressing drive assembly 40 is used to drive the substrate 11 to slide on the mounting seat 30 so that the pressing member 20 is held against the product.

[0125] The base plate 11 is slidably connected to the mounting base 30. The sliding direction of the base plate 11 is the third direction Z, which is perpendicular to the first direction X and can be vertical. The base plate 11 serves as a fixed base for the pitch-changing member 12 and the hold-down member 20. When the base plate 11 slides and descends on the mounting base 30, the pitch-changing member 12 and the hold-down member 20 also slide and descend along the third direction Z, causing the hold-down member 20 to contact the product, pressing and leveling it.

[0126] There are many ways to slide the substrate 11 and the mounting base 30. For example, the mounting base 30 is provided with a slide rail extending along the third direction Z, and the substrate 11 is slidingly connected to the slide rail through a slider; since the length of the substrate 11 along the first direction X is relatively long, optionally, the mounting base 30 is provided with multiple slide rails, and the multiple slide rails are arranged at intervals along the first direction X, and the substrate 11 is slidingly connected to the multiple slide rails at the same time.

[0127] The downward pressing driving assembly 40 is used to drive the substrate 11 to slide. The downward pressing driving assembly 40 may include a cylinder, a ball screw structure, etc.

[0128] By adopting the above technical solution, the downward pressing drive assembly 40 can drive the variable distance unit 10 and the multiple downward pressing members 20 to move up and down as a whole, thereby realizing the downward pressing process of the product.

[0129] In other embodiments, the variable distance unit 10 and multiple pressing members 20 may also be arranged on the mounting seat 30, and the product can be shaped by raising the product and pressing it against the bottom of the pressing member 20; or, a pressing drive structure is provided on the substrate 11, and the pressing drive structure drives each pressing member 20 to descend individually or drives multiple pressing members 20 to descend at the same time.

[0130] In some embodiments, the downward pressure drive assembly 40 includes a downward pressure drive member 41 and a connecting member 42 connected to the downward pressure drive member 41. The downward pressure drive member 41 is arranged on the side of the mounting seat 30 away from the downward pressure member 20 and the variable pitch unit 10, and the connecting member 42 passes through the mounting seat 30 and is connected to the substrate 11.

[0131] As shown in FIG7 , the downward-pressing driving member 41 may include a cylinder and is disposed on the back side of the mounting base 30 to avoid obstructing the movement of the downward-pressing member 20. A connecting member 42 is disposed within a through-hole in the mounting base 30. One side of the connecting member 42 is connected to the driving end of the downward-pressing driving member 41, and the other side is connected to the base plate 11. Due to the long length of the base plate 11, two downward-pressing driving members 41 may be provided, spaced apart along the length of the base plate 11.

[0132] By adopting the above technical solution, the pressing driving member 41 can drive the substrate 11 to descend without obstructing the pressing path of the pressing member 20 .

[0133] The structure and installation position of the downward pressing driving assembly 40 may also be other solutions. For example, the downward pressing driving assembly 40 is respectively arranged on the side of the base plate 11.

[0134] 3 , 4 and 8 , in some embodiments, the pressing member 20 includes a mounting member 21 fixedly connected to the distance-changing member 12 and a holding member 22 connected to the mounting member 21 .

[0135] The mounting member 21 can be an L-shaped plate, one end of which is connected to the distance variable member 12 and the other end is used to mount the holding member 22. The end of the holding member 22 used to resist the product can be cylindrical or other shapes. When the product is a battery cell, the end of the holding member 22 can be slightly larger than the terminal.

[0136] By adopting the above technical solution, the shape of the pressing member 22 can be flexibly designed according to the product to be pressed.

[0137] In some embodiments, the mounting member 21 is provided with a mounting hole, into which the holding member 22 is movably inserted. An elastic member 23 is sleeved over the holding member 22, with its ends respectively abutting against the mounting member 21 and the holding member 22. Thus, the elastic member 23 provides a certain degree of cushioning for the downward pressure of the holding member 22, ensuring that the holding member 22 contacts the product while also preventing the holding member 22 from damaging the product due to excessive pressure.

[0138] Referring to Figures 1 to 8, in some embodiments, the pressing mechanism 100 includes a variable pitch unit 10 and multiple pressing members 20. The variable pitch unit 10 includes a base plate 11, multiple variable pitch members 12, and a pitch-adjusting drive assembly 13. The pitch-adjusting drive assembly 13 includes a screw 131 and a rotary drive member 132 for rotating the screw 131. The screw 131 is provided with multiple threaded portions, and the multiple variable pitch members 12 are respectively connected to the corresponding threaded portions. The variable pitch members 12 can slide along the base plate 11 when the screw 131 rotates to adjust the distance between the variable pitch members 12, thereby adjusting the distance between the multiple pressing members 20. Therefore, the pressing mechanism 100 can automatically adjust the distance between the multiple pressing members 20 to adapt to battery cells of various specifications, and has good compatibility.

[0139] Referring to FIG. 9 , an embodiment of the second aspect of the present application provides a pressurizing device 1000 , comprising the pressing mechanism 100 provided in the first aspect.

[0140] The pressurizing device 1000 can be used in the pressurizing and static process of the battery or other production processes. Since the pressing mechanism 100 is compatible with battery cells of different specifications, the pressurizing device 1000 is also suitable for battery cells of various specifications. There is no need to disassemble and replace the pressing mechanism 100 when the battery cell is changed. The operation is simple, which improves the production efficiency of the pressing process and reduces production costs.

[0141] In some embodiments, the pressurizing device 1000 further includes a bottom plate 200 , and the pressing mechanism 100 is slidably connected to the bottom plate 200 along a second direction Y, where the second direction Y is perpendicular to the first direction X.

[0142] The pressing mechanism 100 can slide along the second direction so that the pressing mechanism 100 can move closer to or farther away from the battery cell, and the degree of automation is relatively high.

[0143] In some embodiments, the pressurizing device 1000 further includes a side pressing mechanism 300 disposed on one side of the downward pressing mechanism 100 . The side pressing mechanism 300 and the downward pressing mechanism 100 are respectively used to press different sides of the product.

[0144] The side pressure mechanism 300 is used to press the side of the product along the second direction Y, and the downward pressure mechanism 100 is used to press the side of the product along the third direction Z. Therefore, the pressurizing device 1000 can pressurize and shape products such as battery cells.

[0145] Optionally, both the side pressure mechanism 300 and the downward pressure mechanism 100 are mounted on the mounting base 30, which is slidably connected to the base plate 200 along the second direction Y. Thus, the side pressure mechanism 300 and the downward pressure mechanism 100 can move synchronously to simultaneously approach the product. Optionally, the side pressure mechanism 300 can also heat the battery cells to solidify the colloid.

[0146] Optionally, two groups of the side pressure mechanism 300 and the downward pressure mechanism 100 are provided and are respectively arranged on both sides of the bottom plate 200, thereby further improving the pressurizing efficiency.

[0147] An embodiment of the third aspect of the present application provides a battery production device, comprising the pressurizing device provided in the second aspect.

[0148] Battery production equipment is used to produce batteries. Battery production equipment may also include devices for various battery production processes, such as electrode production devices, glue coating devices, etc.

[0149] 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 make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions 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 pressing mechanism, characterized in that: include: A distance-changing unit, comprising a substrate and a plurality of distance-changing members sequentially arranged on the substrate along a first direction, at least one of the distance-changing members being capable of moving along the first direction; A plurality of pressing members, each of which is connected to a corresponding distance-changing member, and the pressing members are used for pressing the product.

2. The pressing mechanism according to claim 1, characterized in that: The distance-changing unit further comprises a distance-adjusting driving assembly arranged on the base plate, at least one of the distance-changing members is slidably connected to the base plate, and the distance-adjusting driving assembly is used for driving at least one of the distance-changing members to slide along the first direction.

3. The pressing mechanism according to claim 2, characterized in that: The pitch adjustment drive assembly includes a lead screw disposed on the substrate and extending along the first direction and a rotary drive member connected to the lead screw; At least one threaded portion is disposed on the outer circumferential surface of the screw rod, at least one of the pitch-changing members is transmission-connected to the threaded portion, and the rotary drive member is used to drive the screw rod to rotate, so as to drive the pitch-changing member to slide along the first direction.

4. The pressing mechanism according to claim 3, characterized in that: The screw rod is provided with a plurality of the threaded parts, and the plurality of the distance-changing members are respectively connected in transmission with the corresponding threaded parts. The screw rod can simultaneously drive the plurality of the distance-changing members to slide along the first direction.

5. The pressing mechanism according to claim 4, characterized in that: The screw rod comprises a first section and a second section respectively arranged on both sides of a reference surface, and the reference surface is a cross section of the screw rod; The plurality of threaded portions include at least one first threaded portion provided on the first section and at least one second threaded portion provided on the second section, wherein the first threaded portion and the second threaded portion have opposite rotation directions.

6. The pressing mechanism according to claim 5, characterized in that: There are multiple first threaded portions, and the leads of the multiple first threaded portions increase in a direction away from the second section; and / or, There are multiple second thread portions, and the pitches of the multiple second thread portions increase gradually in a direction away from the first section.

7. The pressing mechanism according to claim 6, characterized in that: The leads of the plurality of first thread portions increase in an arithmetic progression in a direction away from the second section; and / or The leads of the plurality of second thread portions increase in an arithmetic progression along a direction away from the first section.

8. The pressing mechanism according to any one of claims 5 to 7, characterized in that: The first threaded portion and the second threaded portion are symmetrically arranged with respect to the reference plane.

9. The pressing mechanism according to claim 8, characterized in that: One of the pitch-changing members is located between the first threaded portion and the second threaded portion and is mounted on the lead screw via a bearing, and the remaining pitch-changing members are slidably connected to the lead screw.

10. The pressing mechanism according to claim 4, characterized in that: The rotation directions of the plurality of threaded portions are the same; along the axial direction of the screw rod, the leads of the plurality of threaded portions increase in an arithmetic progression.

11. The pressing mechanism according to any one of claims 3 to 10, characterized in that: The threaded portion is a spiral groove extending around the axial thread of the screw rod, one side of the pitch changing member is inserted into the corresponding spiral groove, and the other side of the pitch changing member is connected to the pressing member.

12. The pressing mechanism according to any one of claims 1 to 11, characterized in that: The pressing mechanism also includes a mounting seat and a pressing drive assembly, the substrate is slidably connected to the mounting seat; the pressing drive assembly is arranged on the mounting seat, and the pressing drive assembly is used to drive the substrate to slide on the mounting seat so that the pressing member is pressed against the product.

13. The pressing mechanism according to claim 12, characterized in that: The downward pressing driving assembly includes a downward pressing driving member and a connecting member connected to the downward pressing driving member. The downward pressing driving member is arranged on a side of the mounting seat away from the downward pressing member and the variable pitch unit. The connecting member passes through the mounting seat and is connected to the base plate.

14. The pressing mechanism according to any one of claims 1 to 13, characterized in that: The pressing member comprises a mounting member fixedly connected to the distance-changing member and a holding member connected to the mounting member.

15. The pressing mechanism according to claim 14, characterized in that: The mounting member is provided with a mounting hole, and the pressing member is movably inserted into the mounting hole; an elastic member is sleeved on the pressing member, and two ends of the elastic member are respectively supported by the mounting member and the pressing member.

16. A pressurizing device, characterized in that: It comprises a pressing mechanism as described in any one of claims 1-15.

17. The pressurizing device according to claim 16, characterized in that The pressurizing device further includes a bottom plate, and the pressing mechanism is slidably connected to the bottom plate along a second direction, and the second direction is perpendicular to the first direction.

18. The pressurizing device according to claim 17, characterized in that The pressurizing device further comprises a side pressing mechanism arranged at one side of the downward pressing mechanism, and the side pressing mechanism and the downward pressing mechanism are respectively used for pressing different side surfaces of the product.

19. A battery production device, characterized in that: Comprising a pressurizing device as claimed in any one of claims 16 to 18.

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