CN216084997U - Flatness adjusting device and formation equipment - Google Patents

Abstract

The embodiment of the application provides a flatness adjusting device and formation equipment, and belongs to the technical field of battery manufacturing. The flatness adjusting device comprises a drawing assembly, an adjusting assembly and a supporting assembly. The adjusting component is sleeved on the drawing component, and the supporting component is sleeved on the adjusting component. The drawing assembly is used for being in contact with and connected with a concave part on the shell of the battery monomer, and the adjusting assembly is used for driving the drawing assembly to move so as to enable the drawing assembly to draw the concave part and improve the flatness of the shell; the supporting assembly is used for supporting the adjusting assembly and the drawing assembly in the drawing process. The application draw the subassembly and draw the depressed part of shell under adjusting part's control, it is obvious that this draws the subassembly and only acts on the depressed part of shell, when drawing, can not receive the inside hollow structure's of shell influence, also can not cause the influence to the other positions of shell.

Description

Flatness adjusting device and formation equipment

Technical Field

The embodiment of the application relates to the technical field of battery manufacturing, in particular to a flatness adjusting device and formation equipment.

Background

Lithium ion power batteries are generally packaged using square aluminum, stainless steel or cylindrical aluminum casings. When the power battery is assembled, the electrode assembly is firstly installed in the shell, the end cover and the top of the shell are welded to form a battery monomer, structural adhesive is arranged among the shells of the battery monomers to assemble the battery monomers to form a battery module, the battery module is supported by the support and packaged by the battery shell, and the power battery is formed through the processes of baking, liquid injection, standing, formation and the like.

In the subsequent formation process, because the electrode assembly is formed under negative pressure, the large surface of the shell packaged by the electrode assembly is concave due to the inconsistency of the internal and external pressure of the shell, and the concave can cause the phenomenon that the structural adhesive between the large surfaces has bubbles or uneven coverage, so that the bonding strength of the structural adhesive is influenced, and the structural stability of the module is reduced.

In the prior art, a common flatness improving device improves the flatness of an object in a rolling mode and cannot be suitable for improving the flatness of a shell of a battery cell with a hollow structure.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the embodiments of the present application provide a flatness adjusting device and a formation device, which solve the problem that the existing flatness improving device cannot improve the flatness of the housing of a battery cell with a hollow structure.

According to a first aspect of embodiments of the present application, there is provided a flatness adjustment apparatus including a drawing assembly, an adjustment assembly, and a support assembly. The adjusting component is sleeved on the drawing component, and the supporting component is sleeved on the adjusting component. The adjusting assembly is used for driving the drawing assembly to move so that the drawing assembly draws the concave part on the shell of the single battery, and the flatness of the shell is improved; the supporting component is used for supporting the adjusting component and the drawing component.

In the embodiment of this application, flatness adjusting device draws the subassembly including drawing the subassembly, when drawing the depressed part on the free shell of battery, draws the subassembly and is connected with this depressed part, and the subassembly is drawn in the regulation and makes its direction to keeping away from the depressed part remove in order to draw the depressed part, and the supporting component supports and does not take place to remove drawing subassembly and adjusting component to guarantee to draw drawing of subassembly to the depressed part.

The drawing component is in contact with the concave part on the shell, so that the drawing component only acts on the concave part, other parts on the shell are not affected, and the influence of the hollow structure in the battery shell is avoided.

In some embodiments, the pulling assembly comprises: a drawing member and a drawing portion. Wherein, drawing the piece and being connected with adjusting part, drawing the portion and drawing the piece and be connected. The drawing part is used for drawing the concave part along with the movement of the drawing piece.

Connecting the drawing piece with the adjusting assembly so that the drawing piece can move in a direction away from the concave part under the adjustment of the adjusting assembly; one end of the drawing part is connected with the drawing part, the other end of the drawing part is connected with the concave part, and the drawing part can be conveniently drawn to the concave part along with the movement of the drawing part. The drawing assembly is set into a drawing part and a drawing part, so that the drawing assembly is convenient to assemble with the adjusting assembly while drawing the sunken part on the shell.

In some embodiments, the pulling member and the pulling portion each have a cavity for receiving a negative pressure to draw the pulling portion into engagement with the recessed portion.

Draw the portion and draw the prerequisite that the subassembly was drawn to the depressed part with the depressed part be connected, draw the piece and draw the inside cavity that sets up of portion to make the cavity hold the negative pressure, and then make draw portion and depressed part take place the actuation because of the existence of this negative pressure, increase and draw the subassembly and draw the firm degree of being connected with the depressed part.

In some embodiments, the puller further has a sealing mechanism for sealing the cavity when it contains a negative pressure.

The drawing part is provided with the sealing mechanism, so that when the drawing part and the cavity in the drawing part contain negative pressure, namely the drawing part and the concave part are attracted, the cavity is sealed, and the drawing part and the concave part are always in an attraction state in the drawing process.

In some embodiments, the drawing part is provided with an adsorption cavity and an adsorption ear, and the adsorption ear is used for generating negative pressure in the adsorption cavity so as to attract the drawing part and the concave part.

The drawing part is provided with an adsorption cavity so that the adsorption cavity can contain negative pressure, and the drawing part and the concave part are attracted due to the negative pressure; the suction ear of the drawing part enables the suction cavity to generate the negative pressure, the suction of the drawing part and the concave part is ensured, and the firm degree of the drawing connection of the drawing component and the concave part is increased.

In some embodiments, the end of the pull away from the pull is provided with an adhesive for connecting the recess with the pull.

The end part of the drawing part, which is far away from the drawing part, is provided with the adhesive, so that the drawing part can be directly adhered to the concave part, and the drawing part and the concave part are always in a connection state in the drawing process.

In some embodiments, the puller is provided with a gauge for indicating the displacement of the movement of the puller assembly.

The measuring tool arranged on the drawing part can indicate the displacement of the drawing part in real time in the drawing process, so that the distance of the drawing component for drawing the concave part is indicated, and the adjustment precision of the flatness of the shell of the battery cell is improved.

In some embodiments, the adjustment assembly comprises: a fixing member and an adjusting member. The fixing part is connected with the supporting component, the adjusting part is movably connected with the fixing part and connected with the drawing part, and the adjusting part is used for driving the drawing part to move.

In the drawing process, the fixing piece is used for connecting the adjusting assembly with the supporting assembly and ensuring that the supporting assembly is always in a static state, the adjusting piece moves relative to the fixing piece and the supporting assembly and drives the drawing assembly to move towards the direction far away from the concave part, and the drawing reliability of the drawing assembly on the concave part is improved.

In some embodiments, the adjusting member has a first limiting portion therein, the outer wall of the drawing member has a second limiting portion, and the first limiting portion is used for limiting the second limiting portion.

Be provided with first spacing portion in the regulating part, draw a set of outer wall and set up the spacing portion of second, carry on spacingly to the spacing portion of second through first spacing portion, make and draw the piece and remove along with the removal of regulating part, improve and draw the dynamics of drawing of subassembly to the depressed part.

In some embodiments, the support assembly comprises: a connecting portion and a supporting portion. The connecting part is connected with the adjusting component; the supporting part is connected with the connecting part and is used for supporting the drawing assembly and the adjusting assembly.

The connecting part connects the supporting component and the adjusting component, so that the contact area between the supporting component and the adjusting component is increased; the supporting part is connected with connecting portion, has improved the supporting force degree of supporting component to adjusting part and drawing the subassembly.

In some embodiments, the support is telescopic, the support comprising at least a first support and a second support. The first supporting part is connected with the connecting part and forms an included angle with the drawing assembly; the second supporting part is movably connected with the first supporting part and is used for adjusting the length of the supporting part.

The supporting part is arranged to be of a telescopic structure, and an included angle is formed between the first supporting part and the drawing assembly, so that the periphery of the concave part supported by the supporting assembly can be conveniently supported, and the drawing of the concave part by the drawing assembly is ensured; the second supporting part and the first supporting part are movably connected, so that the length of the supporting part can be conveniently adjusted, and the supporting component is suitable for areas of different supporting surfaces.

In some embodiments, the support assembly further comprises a guard; the protection portion is used for preventing the support assembly from slipping when supporting.

The protection part that sets up on the supporting part has increased the frictional force between supporting part and the free shell of battery, has reduced the slip on the supporting part holding surface, has improved the support dynamics of supporting component to the adjusting part with draw the subassembly.

In a second aspect, the present application provides a formation apparatus comprising the flatness adjustment device of the first aspect.

The foregoing description is only an overview of the technical solutions of the embodiments of the present application, and the embodiments of the present application can be implemented according to the content of the description in order to make the technical means of the embodiments of the present application more clearly understood, and the detailed description of the present application is provided below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present application more clearly understandable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic diagram of a battery cell according to some embodiments of the present disclosure;

FIG. 2 is a schematic view of a flatness adjustment apparatus according to some embodiments of the present application;

FIG. 3 is a schematic view of a flatness adjustment mechanism adjusting the flatness of the housing of a battery cell according to some embodiments of the present application;

FIG. 4 is a cross-sectional view of a first drawing assembly in some embodiments of the present application;

FIG. 5 is an exploded view of a sealing mechanism according to some embodiments of the present application;

FIG. 6 is a schematic view of the sealing mechanism of some embodiments of the present application as it is opened;

FIG. 7 is a schematic view of a sealing mechanism of some embodiments of the present application as it is closed;

FIG. 8 is a cross-sectional view of a second drawing assembly in some embodiments of the present application;

FIG. 9 is a cross-sectional view of a third drawing assembly in some embodiments of the present application;

FIG. 10 is a schematic view of a first adjustment assembly according to some embodiments of the present application;

FIG. 11 is a schematic view of a second adjustment assembly according to some embodiments of the present application;

FIG. 12 is a schematic view of the first position-limiting portion and the second position-limiting portion for limiting according to some embodiments of the present disclosure;

FIG. 13 is a schematic view of a first support assembly according to some embodiments of the present disclosure;

FIG. 14 is a schematic view of a second support assembly according to some embodiments of the present disclosure;

FIG. 15 is a schematic view of a formation device according to some embodiments of the present application.

Description of reference numerals:

the drawing component 1, the drawing piece 11, the measuring tool 111, the second limiting part 112, the drawing part 12, the cavity 13,

the sealing mechanism 14, the valve body 141, the screw 142, the adsorption cavity 15, the adsorption lug 16,

an adhesive 17;

the adjusting component 2, the fixing part 21, the adjusting part 22 and the first limiting part 221;

the support member 3, the connecting portion 31, the support portion 32, the first support portion 321, the second support portion 322,

a protection portion 33;

battery cell 4, electrode assembly 40, case 41, recessed portion 410, end cap 42;

the formation equipment 5, the detection unit 51, the control unit 52, the vacuum-pumping unit 53, the display unit 54,

an exhaust tube 55.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

The terms "comprising" and "having," and any variations thereof, in the description and claims of this application and the description of the drawings are intended to cover, but not to exclude, other elements. The word "a" or "an" does not exclude a plurality.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The following description will be given with reference to the orientation words shown in the drawings, and will not be construed as limiting the specific structure of the flatness adjustment apparatus of the present application. For example, in the description of the present application, the terms "length," "thickness," "upper," "lower," "vertical," "horizontal," "inner," "outer," and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like in the description and claims of the present application or in the above-described drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential order, and may explicitly or implicitly include one or more of the features.

In the description of the present application, unless otherwise specified, "plurality" means two or more (including two), and similarly, "plural groups" means two or more (including two).

In the description of the present application, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., "connected" or "connected" of a mechanical structure may refer to a physical connection, e.g., a physical connection may be a fixed connection, e.g., a fixed connection by a fastener, such as a screw, bolt, or other fastener; the physical connection can also be a detachable connection, such as a mutual clamping or clamping connection; the physical connection may also be an integral connection, for example, a connection made by welding, gluing or integrally forming the connection. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

At present, the application of the power battery is more and more extensive from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like, and a plurality of fields such as military equipment and aerospace. With the continuous expansion of the application field of the power battery, the market demand is also continuously expanding.

When assembling the power battery, structural adhesive is required to be arranged between the shells of the plurality of battery monomers so as to assemble the plurality of battery monomers to form a battery module; and finally, supporting the battery module by a support and packaging the battery module by a battery case, and forming the power battery by baking, injecting liquid, standing, forming and other processes.

The inventor finds that: in the process of putting into the battery and becoming the equipment and carrying out the formation step, because electrode subassembly becomes under the negative pressure, can produce the indent because of the difference of shell internal and external pressure to the shell big face of its encapsulation, this indent can lead to the structure between each shell to glue bubble appearance or produce and cover inhomogeneous phenomenon, and then influences the cohesive strength that the structure glued, reduces the structural stability of module.

The flatness improving device in the prior art is provided with a hollow base, hydraulic equipment is installed in an inner cavity of the hollow base, a supporting base plate is arranged at the top of the hollow base, supporting pillars are installed at four corners of the supporting base plate, and steel blocks and hollow grooves are fixed at the lower parts of top plates installed at the tops of the four supporting pillars. When the flatness is improved, the supporting base plate, the supporting strut and the top plate are driven to lift through hydraulic equipment so as to drive the rigid blocks below the top plate and the hollow grooved drum to generate up-and-down displacement, and rolling on the object is realized so as to improve the flatness of the object. It is thus clear that the flatness of an object is improved by a flatness improving device in the prior art in a rolling manner, and when the flatness adjusting device is used for adjusting the flatness of a shell of a battery cell, the rolling manner cannot adjust the concave part of the shell, the external dimension of the shell may be changed, and even the electrode assembly inside the shell may be deformed, thereby causing the electrical safety problem.

In order to solve the problem of the concave housing of the battery cell, the inventor researches a flatness adjusting device, which comprises a drawing assembly, an adjusting assembly and a supporting assembly. Wherein, the adjusting component is sleeved on the drawing component, and the supporting component is sleeved on the adjusting component. Draw the depressed part in-process on the free shell of battery, draw the depressed part of subassembly and shell and be connected, the adjusting part is adjusted and is drawn the subassembly and make its orientation of keeping away from the depressed part remove in order to realize drawing the depressed part, and the supporting component sets up at the periphery of depressed part and supports drawing subassembly and adjusting component. It is thus clear that the subassembly of drawing of this application only acts on the sunken position on the free shell of battery, can not receive the influence of the inside hollow structure of shell, can not cause the influence to other positions of shell yet.

The flatness adjusting device can not only ensure that the shell of the battery monomer is adjusted, but also ensure that other parts of the shell cannot be influenced. In addition, for prior art, the flatness adjusting device of this application need not to set up actuating mechanism such as hydraulic drive equipment, only realizes the drive to the pulling and pulling subassembly through adjusting part, and use cost is low.

The flatness adjusting device disclosed in the embodiment of the application can be but not limited to the adjustment of the flatness of the shell of the battery cell, and can also be used for adjusting the flatness of other objects, such as automobile sheet metal and deformed boxes.

For convenience of explanation, the following embodiments will be described with reference to the adjustment of the flatness of the outer case of the battery cell.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a battery cell. As shown in fig. 1, the battery cell 4 includes an electrode assembly 40, a case 41, an end cap 42, and other functional components. Among them, the electrode assembly 40 is a component in which electrochemical reactions occur in the battery cell 4, and is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The portions of the positive and negative electrode tabs having the active material constitute the body portions of the electrode assembly, and the portions of the positive and negative electrode tabs having no active material each constitute a tab. During the charging and discharging process of the battery, the positive active material and the negative active material react with the electrolyte, and the tabs are connected with the electrode terminals to form a current loop. The case 41 is an assembly for fitting the end cap 42 to accommodate the electrode assembly 40, the electrolyte, and other components. The housing 41 may be of various shapes and various sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 41 may be determined according to the specific shape and size of the electrode assembly 40. The end cap 42 refers to a member that covers an opening of the case 41 to isolate the internal environment of the battery cell from the external environment.

According to some embodiments of the present application, please refer to fig. 2, and fig. 2 is a schematic diagram of a flatness adjusting apparatus according to an embodiment of the present application. As shown in fig. 2, the present application provides a flatness adjustment apparatus. The flatness adjusting device comprises a drawing assembly 1, an adjusting assembly 2 and a supporting assembly 3. The adjusting component 2 is sleeved on the drawing component 1, and the supporting component 3 is sleeved on the adjusting component 2. The adjusting assembly 2 is used for driving the drawing assembly 1 to move, so that the drawing assembly 1 draws the concave part 410 on the shell 41 of the battery monomer 4, and the flatness of the shell 41 is improved; the support assembly 3 is used for supporting the adjusting assembly 2 and the drawing assembly 1.

The material of the portion contacting the concave portion 410 of the pulling member 1 may be an elastic material, for example, rubber, and the like, which is not limited in the present application.

The shape of the adjustment assembly 2 may be a hollow cylinder or a hollow prism. The adjusting component 2 and the drawing component 1 can be fixedly connected into a whole or detachably connected together. When the fixing is integrated, the fixing may be welded or bonded by an adhesive. When detachably connected, they may be screwed together.

The supporting component 3 and the adjusting component 2 can be integrally connected or detachably connected. The detachable connection facilitates the assembly of the adjustment assembly 2 and the pulling assembly 1.

When the adjusting component 2 and the drawing component 1, as well as the adjusting component 2 and the supporting component 3 are integrally connected, before drawing, the drawing component 1 is arranged at the concave part 410, and the supporting component 3 is arranged at the peripheral part of the concave part 410. For example, as shown in fig. 3, one end of the drawing member 1 may be disposed at the recess 410, and the supporting member 3 may be disposed on the housing 41 around the recess 410.

When adjusting part 2 and drawing subassembly 1, adjusting part 2 and supporting component 3 all adopt to dismantle and be connected, before drawing, will draw subassembly 1 and set up at depressed part 410, connect adjusting part 2 on drawing subassembly 1, connect supporting component 3 on adjusting part 2, set up supporting component 3 at the periphery of depressed part 410 again. For example, as shown in fig. 3, the drawing member 1 may be disposed at the recess 410, the adjusting member 2 may be coupled to the drawing member 1, the supporting member 3 may be coupled to the adjusting member 2, and the supporting member 3 may be supported on the housing 41 around the recess 410.

The flatness adjusting device of the present embodiment adjusts the flatness of the housing 41 of the battery cell 4 as follows:

firstly, the drawing component 1 in the flatness adjusting device is connected with the concave part 410 on the shell 41 of the battery cell 4, the adjusting component 2 is controlled to move towards the direction far away from the concave part 410, and when the adjusting component 2 moves towards the direction far away from the concave part 410, the drawing component 1 can be driven to move towards the direction far away from the concave part 410 so as to draw the concave part 410.

By providing the drawing unit 1 in contact with the recessed portion 410 of the housing 41, the drawing unit 1 can be made to act only on the recessed portion 410, and does not affect other portions of the housing 41 or the hollow structure inside the housing 41 of the battery cell 4.

Fig. 4 is a cross-sectional view of a first drawing assembly. As shown in fig. 4, in some embodiments, the drawing assembly 1 comprises: a drawing member 11 and a drawing section 12. Wherein, the drawing piece 11 is connected with the adjusting component 2, and the drawing part 12 is connected with the drawing piece 11. The drawing part 12 is used to draw the depressed portion 410 with the movement of the drawing member 11.

The material of the puller 11 may be metal, alloy, or plastic. The shape of the drawing member 11 may be cylindrical or prismatic.

The material of the drawing part 12 may be an elastic material, for example, rubber. The shape of the drawing portion 12 may be a plate shape or a horn shape.

The pulling element 11 and the pulling part 12 may be integrally formed or may be detachably connected. When provided as one piece, it may be bonded by an adhesive; when the detachable connection is adopted, the connection can be realized through a buckle, the connection can also be mutually sleeved, the connection can also be realized through a thread connection, and the like.

The pulling element 11 and the adjusting assembly 2 can be integrated or can be connected in a detachable manner. When the detachable connection mode is adopted, the drawing piece 11 can be sleeved in the adjusting component 2 and can also be in threaded connection with the adjusting component 2.

When the drawing part 11 and the drawing part 12, the drawing part 11 and the adjusting component 2 are detachably connected, the assembly of the drawing component 1 and the adjusting component 2 is more convenient.

The drawing assembly 1 of the present embodiment draws the recessed portion 410 of the housing 41 of the battery cell 4:

the adjusting component 2 is controlled to move in the direction away from the recessed portion 410, when the adjusting component 2 moves in the direction away from the recessed portion 410, the pulling member 11 can be driven to move in the direction away from the recessed portion 410, and then the pulling portion 12 is driven to move along with the pulling member 11 to pull the recessed portion 410.

The drawing part 11 is connected with the adjusting component 2, the drawing part 12 is connected with the drawing part 11, when the adjusting component 2 moves towards the direction far away from the concave part 410, the drawing part 11 and the drawing part 12 are driven to move towards the direction far away from the concave part 410 together, so that the drawing component 1 can draw the concave part 410 conveniently. In addition, the drawing assembly 1 is provided with the drawing piece 11 and the drawing part 12, so that the drawing assembly 1 can be conveniently assembled with the adjusting assembly 2 while the drawing assembly 1 is ensured to draw the concave part 410 on the shell 41 of the battery cell 4.

With continued reference to fig. 4, in some embodiments, the pulling element 11 and the pulling part 12 each have a cavity 13, and the cavity 13 is used for receiving a negative pressure to pull the pulling part 12 into engagement with the recessed portion 410.

The cavity 13 is provided inside the puller 11 and the puller 12 and penetrates the puller 11 and the puller 12 in the extension direction of the puller 11. The shape of the cavity 13 may be cylindrical or prismatic, which is not limited in this application.

The drawing of the depressed part 410 by the drawing member 11 and the drawing part 12 of the present embodiment is:

the drawing part 12 is contacted with the concave part 410, the air in the cavity 13 is pumped out, negative pressure is formed inside the cavity 13 and at the contact part of the drawing part 12 and the concave part 410, the drawing part 12 and the concave part 410 are attracted under the action of the negative pressure, and the adjusting component 2 drives the drawing part 11 and the drawing part 12 to move towards the direction far away from the concave part 410 so as to draw the concave part 410.

The connection of the drawing part 12 and the concave part 410 is a precondition for drawing the concave part 410 by the drawing component 1, and the cavity 13 is arranged in the drawing part 11 and the drawing part 12, so that the cavity 13 can contain negative pressure, and then the drawing part 12 and the concave part 410 can be attracted due to the negative pressure, and the connection firmness degree of the drawing component 1 and the concave part 410 is increased.

With continued reference to fig. 4, in some embodiments the puller 11 further has sealing means 14, the sealing means 14 being adapted to seal the cavity 13 when it contains a negative pressure.

The sealing mechanism 14 may be arranged at an end of the pull-off member 11 remote from the pull-off portion 12. The sealing mechanism 14 may be a sealing plug or a valve. When the valve is used, for example, as shown in fig. 5 to 7, a valve body 141 having a threaded hole and a screw 142 threaded into the threaded hole may be used, and specifically, an open state of the valve is shown in fig. 6, and a closed state of the valve is shown in fig. 7. The material of the sealing mechanism 14 may be rubber or metal, which is not limited in the present application.

The sealing mechanism 14 of the embodiment can seal the cavity 13 when the cavity 13 contains negative pressure, so as to reduce the possibility of leakage of the negative pressure in the cavity, so as to improve the reliability of the suction between the drawing part 12 and the recessed portion 410, thereby facilitating the adjustment assembly 2 to drive the drawing part 11 and the drawing part 12 to move towards the direction far away from the recessed portion 410, so as to draw the recessed portion 410.

By arranging the sealing mechanism 14 on the drawing part 11, when the drawing part 11 and the cavity 13 in the drawing part 12 contain negative pressure, that is, when the drawing part 12 is attracted to the concave part 410, the cavity 13 is sealed, so as to ensure that the drawing part 12 and the concave part 410 are always in an attraction state in the drawing process.

Referring to fig. 8, fig. 8 is a cross-sectional view of a second drawing assembly. In some embodiments, the pulling part 12 has an absorption cavity 15 and an absorption ear 16, and the absorption ear 16 is used for generating negative pressure in the absorption cavity 15 to absorb the pulling part 12 with the concave part 410.

The adsorption chamber 15 may be formed in a horn shape, a cylindrical shape, or the like.

The material of the adsorption ear 16 can be rubber; the adsorption ear 16 has a hollow structure. The suction ears 16 may be integrally or detachably connected to the pulling part 12. When detachably connected, it may be by a threaded connection. The adsorption ear 16 may be provided with a sealing member capable of separating the adsorption cavity 15 and the adsorption ear 16.

When the drawing component 1 of this embodiment draws the recessed portion 410, the suction lug 16 is firstly squeezed to exhaust the air in the suction cavity 15 and the suction lug 16, then the drawing part 12 is tightly attached to the recessed portion 410, and then the suction lug 16 is released to make a small amount of air in the drawing part 12 and the recessed portion 410 enter the suction cavity 15 and the suction lug 16, so that negative pressure is generated inside the suction lug 16 and the suction cavity 15, and under the action of the negative pressure, the drawing part 12 and the recessed portion 410 can be tightly sucked, so that the adjusting component 2 drives the drawing part 11 and the drawing part 12 to move towards the direction far away from the recessed portion 410, so as to draw the recessed portion 410.

The suction cavity 15 is arranged on the drawing part 12, so that the suction cavity 15 can contain negative pressure, the drawing part 12 and the concave part 410 can be sucked due to the negative pressure, the suction lug 16 is arranged on the drawing part 12, the negative pressure generated in the suction cavity 15 can be ensured, and the firmness degree of connection between the drawing component 1 and the concave part 410 is increased.

Referring to fig. 9, fig. 9 is a cross-sectional view of a third drawing assembly. In some embodiments, the end of the pulling part 12 remote from the pulling element 11 is provided with an adhesive 17, the adhesive 17 being used to connect the recessed portion 410 with the pulling part 12.

The end of the drawing part 12 far from the drawing part 11 is a part in the drawing part 12 for connecting with the concave part 410, the adhesive 17 in this embodiment is disposed at the end of the drawing part 12 far from the drawing part 11, the adhesive 17 bonds the drawing part 12 with the concave part 41, so that the adjusting component 2 drives the drawing part 11 and the drawing part 12 to move towards the direction far from the concave part 410, so as to draw the concave part 410.

The end of the drawing part 12 far away from the drawing piece 11 is provided with the adhesive 17 to directly adhere the drawing part 12 and the concave part 410, so that the drawing part 12 and the concave part 410 are always in a connected state in the drawing process.

After the drawing is completed, the adhesive 17 needs to be completely separated from the recessed portion 410 to prevent the residual adhesive 17 from affecting the adhesive strength of the structural adhesive between the battery cells 4.

In addition, in the present embodiment, in addition to the above-mentioned embodiment in which the drawing part 12 is sucked into the recessed portion 410, the adhesive 17 is provided at the end of the drawing part 12 away from the drawing member 11, so that not only the sucking force but also the adhesive force is provided between the drawing part 12 and the recessed portion 410, and the connection between the drawing part 12 and the recessed portion 410 can be further increased.

With continued reference to fig. 4, 8, 9, in some embodiments the puller 11 is provided with a gauge 111, the gauge 111 being adapted to indicate the displacement of the movement of the puller assembly 1.

The gauge 111 may be a scale line engraved on the outer periphery of the puller 11, a length gauge bonded to the outer periphery of the puller 11, or a distance sensor fixed to the outer periphery of the puller 11.

When the gauge 111 is a graduation mark and a length scale, the graduation mark may be provided on the drawing member 11 in a region between the adjustment member 2 and the drawing part 12. In addition, the adjusting assembly 2 comprises a movable part for driving the drawing part 11 to move and a fixed part for connecting with the supporting assembly 3, wherein the fixed part is preset with an indicating position. When the adjusting component 2 does not drive the pulling component 11 to move, the indicating position corresponds to a first scale mark on the measuring tool 111, after the adjusting component 2 drives the pulling component 11 to move, the indicating position corresponds to a second scale mark on the measuring tool 111, and a numerical value difference between the first scale mark and the second scale mark can be used for indicating the displacement of the pulling component 11, so as to indicate the distance of the pulling component 1 for pulling the concave part 410.

When the gauge 111 is a distance sensor, the distance sensor may be an infrared sensor. Can acquire the distance between distance sensor and the shell 41 in real time through this distance sensor, it is specific, when adjusting component 2 does not drive and draw the subassembly 11 to move, distance sensor gathers its and the shell 41 between the distance as first distance, after adjusting component 2 drives and draws the piece 11 and remove, distance sensor gathers its and the shell 41 between the distance as the second distance, the distance difference between this first distance and this second distance can be used for instructing the displacement of drawing the piece 11, and then instruct to draw the distance that subassembly 1 pulled to depressed part 410.

The accuracy of adjusting the flatness of the shell 41 is improved by arranging the gauge 111 on the drawing member 11 to indicate the displacement of the drawing member 11 in real time in the drawing process, and further indicate the drawing distance of the drawing assembly 1 to the concave part 410.

Please refer to fig. 10 and 11, which are schematic diagrams of a first adjusting assembly and a second adjusting assembly, respectively. In some embodiments, the adjustment assembly 2 comprises: a fixed member 21 and an adjusting member 22. The fixing part 21 is connected with the supporting component 3, the adjusting part 22 is movably connected with the fixing part 21 and connected with the drawing part 11, and the adjusting part 22 is used for driving the drawing part 11 to move.

The fixing member 21 may be the fixing portion in the foregoing embodiment. The fixing member 21 may be a hollow cylinder or a hollow prism.

The adjustment member 22 may be a movable portion in the foregoing embodiment. The adjusting member 21 may have the same structure as the fixing member 21 or may have a different structure.

The fixing member 21 and the adjusting member 22 are movably connected, specifically, the movable connection may be through a threaded connection, a sliding connection, or a mutual sleeving connection.

The fixing member 21 and the supporting member 3 may be integrally connected or detachably connected. When a detachable connection is used, a locking member, which may be a combination of a washer and a nut, may be provided on the fixing member 21 as in fig. 8, and the support assembly 3 may be locked to the fixing member 21 by the locking member. The adjusting member 22 and the pulling member 11 may be integrally connected, detachably connected, or may be in an interference fit, which is not limited in this application.

In the embodiment, during the process of pulling the housing 41 of the battery cell 4, the adjusting member 22 moves relative to the fixing member 21, and drives the pulling member 11 to move in the direction away from the recessed portion 410 during the moving process, so that the pulling portion 12 pulls the recessed portion 410.

The fixing piece 21 is arranged to connect the adjusting component 2 and the supporting component 3, and the fixing piece 21 and the supporting component 3 are always in a static state in the drawing process; through setting up regulating part 22, can make regulating part 22 remove for mounting 21 and supporting component 3 to drive and draw subassembly 1 and remove towards the direction of keeping away from depressed part 410, improve the reliable degree of drawing subassembly 1 to depressed part 410.

In some embodiments, the adjusting member 22 has a first position-limiting portion 221 therein, the outer wall of the drawing member 11 has a second position-limiting portion 112, and the first position-limiting portion 221 is used for limiting the second position-limiting portion 112.

Please refer to fig. 12, which is a schematic structural diagram of the first position-limiting portion 221 and the second position-limiting portion 112. The first position-limiting portion 221 may be a protruding edge disposed inside the adjusting member 22, and the first position-limiting portion 221 may be integrally connected with the adjusting member 22. The second position-limiting portion 112 may be a protrusion disposed on the outer side of the pulling element 11, and the second position-limiting portion 112 and the pulling element 11 are integrally connected, and may be welded.

When the adjusting member 22 of the present embodiment moves in the direction away from the recessed portion 410, the first position-limiting portion 221 and the second position-limiting portion 112 are used to limit the pulling member 11 by the adjusting member 22, so that the pulling member 11 moves together with the adjusting member 22 in the direction away from the recessed portion 410 to pull the recessed portion 410.

Through set up first spacing portion 221 in regulating part 22, set up second spacing portion 112 at drawing 11 outer wall, make regulating part 22 play limiting displacement to drawing 11, guarantee to draw 11 along with the removal of regulating part 22, improve the drawing dynamics of drawing subassembly 1 to depressed part 410.

Fig. 13 is a schematic view of a first support assembly. In some embodiments, the support assembly 3 comprises: a connecting portion 31 and a supporting portion 32. The connecting part 31 is connected with the adjusting component 2; the support portion 32 is connected to the connection portion 31, and the support portion 32 is used to support the drawing assembly 1 and the adjustment assembly 2.

The connecting portion 31 has a ring structure, and may be a circular ring, a square ring, a polygonal ring, or the like.

The material of the support portion 32 may be metal or nonmetal, and has sufficient rigidity. The supporting portion 32 may be a supporting rod or a supporting frame. When for the bracing piece, the supporting part 32 can set up two sets ofly, and including two bracing pieces in every group, these two bracing pieces are connected respectively on a connecting portion 31, and the thickness of every connecting portion 31 is every half of supporting part 32 and connecting portion 31 contact terminal surface thickness of group, and like this, the thickness after two connecting portions 31 overlap together is the thickness of the terminal surface of being connected of two sets of supporting parts 32 and connecting portion 31 promptly. The setting of above-mentioned structure can be convenient for adjust the angle between two sets of supporting parts 32 to the shell 41 shape of adaptation battery monomer 4, for example, when the shape of shell 41 is the square, can adjust the contained angle between two sets of supporting parts 32 big, when the shape of shell 41 is the rectangle, can adjust the contained angle between two sets of supporting parts 32 little.

The connecting portion 31 may be integrally provided with the fixing member 21 or detachably connected thereto. When connecting through dismantling, can be like fig. 8, be equipped with the stopper at the top of mounting 21, cup joint connecting portion 31 on mounting 21 of stopper below to pass through retaining member locking, specific, the retaining member can be the combination of gasket and nut with the below of connecting portion 31.

In the supporting assembly 3 of the present embodiment, when supporting the adjusting assembly 2 and the drawing assembly 1, the connecting portion 31 is sleeved on the fixing member 21 of the adjusting assembly 2, and is locked and fixed by the locking member, and the supporting portions 32 are dispersed around the recessed portion 410.

By arranging the connecting part 31 on the supporting part 32 and fixedly connecting the connecting part 31 with the fixing part 21 in the adjusting assembly 2, the contact area between the fixing part 21 and the connecting part 31 can be increased, and the supporting force of the supporting assembly 3 on the adjusting assembly 2 and the drawing assembly 1 can be improved.

Please refer to fig. 14, which is a schematic diagram of a second supporting assembly. In some embodiments, the support portion 32 is telescopic, and the support portion 32 includes at least a first support portion 321 and a second support portion 322. The first supporting part 321 is connected with the connecting part 31 and forms an included angle with the drawing assembly 1; the second supporting portion 322 is movably connected to the first supporting portion 321, and the second supporting portion 322 is used for adjusting the length of the supporting portion 32.

In this embodiment, at least two support portions 32 may be provided. The support portion 32 can be extended and retracted by a slide rail, or by means of engagement of tooth grooves and saw teeth, a key groove structure, or the like.

The first supporting portion 321 is connected to the connecting portion 31, and an included angle is formed between the first supporting portion 321 and the drawing assembly 1, where the included angle may be an included angle formed by the first supporting portion 321 and the drawing assembly 1 directly contacting each other, or an included angle formed when the first supporting portion 321 and the drawing assembly 1 intersect each other along a long line. When the included angle is 0 °, the support portion 32 is perpendicular to the housing 41 of the battery cell 4; when the included angle changes from 1 ° to 89 °, the area of the region covered on the housing 41 after the plurality of supporting portions 32 contact the housing 41 gradually increases; when the angle is 90 °, the plurality of supporting portions 32 are all horizontally placed on the housing 41.

When the supporting portion 32 is supported on the housing 41 around the recessed portion 410, the supporting assembly 3 can be adapted to the housings 41 of the battery cells 4 with different areas by adjusting the included angle between the first supporting portion 321 and the drawing assembly 1. For example, if the area of the housing 41 is smaller, the included angle between the first supporting portion 321 and the pulling assembly 1 may be reduced to reduce the coverage area of the plurality of supporting portions 32 on the housing 41, so as to ensure that the supporting portions 32 can be suitable for the area of the housing 41, and if the area of the housing 41 is larger, the included angle between the first supporting portion 321 and the pulling assembly 1 may be increased to increase the coverage area of the plurality of supporting portions 32 on the housing 41, so as to ensure the supporting strength of the supporting portions 32.

The second supporting portion 322 is movably connected to the first supporting portion 321. The support assembly 3 can be adapted to the housings 41 of the battery cells 4 of different areas by adjusting the length of the support portion 32. Specifically, for example, the second support portion 322 is adjusted to move in a direction away from the first support portion 321 to increase the length of the support portion 32, and the second support portion 322 is adjusted to move in a direction toward the first support portion 321 to decrease the length of the support portion 32.

When the supporting portion 32 is supported on the periphery of the recessed portion 410 of the housing 41, if the area of the housing 41 is small, the length of the supporting portion 32 can be reduced to reduce the coverage area of the supporting portion 32 on the housing 41, so as to ensure that the supporting portion 32 can be applied to the area of the housing 41, and if the area of the housing 41 is large, the length of the supporting portion 32 can be increased to increase the coverage area of the supporting portion 32 on the housing 41, so as to ensure the supporting strength of the supporting portion 32.

On the basis of the above, before the drawing of the recessed portion 410, the included angle between the first supporting portion 321 and the drawing assembly 1 of the present embodiment is selected according to the shape and the area of the housing 41 of the battery cell 4, and the length of the supporting portion 32 is adjusted, so that the supporting portion 32 can be distributed on the periphery of the recessed portion 410 on the housing 41 to support the adjusting assembly 2 and the drawing assembly 1.

An included angle is formed between the first supporting portion 321 and the drawing assembly 1, and the second supporting portion 322 and the first supporting portion 321 are movably connected, so that the coverage area of the supporting portion 32 on the casing 41 can be increased or decreased, and the supporting assembly 3 is suitable for casings 41 with different areas by adjusting the length of the supporting portion 32.

With continued reference to fig. 13 and 14, in some embodiments, the support assembly 3 further includes a protection portion 33; the protector 33 is for preventing the support member 3 from slipping while being supported.

In the supporting assembly 3 of the present embodiment, when supporting the drawing assembly 1 and the adjusting assembly 2, the protection portion 33 may be disposed on the periphery of the recessed portion 410 of the housing 41, or may be disposed on the storage surface on the periphery of the battery cell 4.

The protection part 33 may be an anti-slip material, and the shape of the protection part 33 may be provided in a circular shape, a square shape, an oval shape, or the like. When the supporting component 3 is supported on the casing 41, the friction force between the protecting part 33 and the casing 41 can be increased by the arrangement of the anti-slip material, so that the protecting part 33 is prevented from slipping on the casing 41, and the casing is prevented from being damaged by the supporting component 3.

In order to further improve the anti-slip effect, the size of the protection part 33 may be set larger than that of the support part 32, so that when the support assembly 3 is supported on the housing 41, the area of the contact part between the protection part 33 and the housing 41 is larger than that of the contact part between the support part 32 and the protection part 33, and the acting force exerted by the protection part 33 on the housing 41 is larger than that exerted by the support part 32 on the housing 41, so that the anti-slip effect can be improved, and the damage of the support assembly 3 on the housing 41 of the battery cell 4 can be reduced.

The protection part 33 is arranged on the supporting part 32 to increase the friction force between the supporting part 32 and the shell 41, reduce the sliding of the supporting part 32 on the shell 41, improve the supporting force of the supporting component 3 on the adjusting component 2 and the drawing component 1, and reduce the damage of the supporting component 3 on the surface of the shell 41.

Referring to fig. 15, fig. 15 is a schematic view of a formation device according to some embodiments of the present disclosure. As shown in fig. 15, the formation equipment comprises the flatness adjusting device of the first aspect, and the formation equipment is suitable for the flatness adjusting device with the first drawing assembly and the second drawing assembly.

The formation equipment further comprises a detection unit 51, a control unit 52, a vacuum-pumping unit 53 and a display unit 54. Wherein the detection unit 51 is connected to an input of the control unit 52, and the evacuation unit 53 and the display unit 54 are connected to an output of the control unit 52. The evacuation unit 53 is connected to the cavity 13 through an evacuation tube 55.

In the drawing process, the forming equipment and the flatness adjusting device draw the concave part 410 on the shell 41 of the battery cell 4 as follows:

the detecting unit 51 detects the pressure inside the depressed portion 410 as a reference pressure, detects the pressure inside the cavity 13 as a suction pressure, and transmits the reference pressure and the suction pressure to the control unit 52; the control unit 52 obtains the reference pressure and the suction pressure, controls the display unit 54 to display, compares the reference pressure and the suction pressure to output a vacuum instruction, and controls the vacuum unit 53 to draw air inside the cavity 13 through the air suction pipe 55 based on the vacuum instruction until the suction pressure inside the cavity 13 is consistent with the reference pressure inside the housing 41.

To further understand the adjustment of the flatness of the housing 41 of the battery cell 4 by the formation device, the adjustment is explained by way of example below.

Suppose that: the minimum drawing force required for drawing the depressed portion 410 is a, the drawing force of the drawing unit 11 when drawing the depressed portion 410 is B, and the drawing force of the drawing unit 11 when separating from the depressed portion 410 is C.

In order to realize the drawing of the drawing assembly 11 on the recessed portion 410 and ensure that the drawing assembly 11 does not depart from the housing 41, it is required to ensure that the drawing force B of the drawing assembly 11 when drawing the recessed portion 410 is greater than the minimum drawing force a required when drawing the recessed portion 410, and that the drawing force B of the drawing assembly 11 when drawing the recessed portion 410 is less than the drawing force C of the drawing assembly 11 when departing from the recessed portion 410.

If the suction pressure is lower than the reference pressure, the drawing force C of the drawing member 11 away from the concave portion 410 is reduced, so that the drawing force B of the drawing member 11 drawing the concave portion 410 is greater than the drawing force C of the drawing member 11 away from the concave portion 410, and the drawing member 11 is separated from the surface of the housing 41. If the suction pressure is greater than the reference pressure, it causes the drawing force B of the drawing member 11 drawing the recess 410 to be superimposed on the drawing force C of the drawing member 11 separating from the recess 410, so that the recess 410 is raised with respect to the plane of the housing 41. Therefore, it is necessary to ensure that the reference pressure inside the cavity 13 coincides with the drawing pressure outside the housing 41.

When the pressure inside the cavity 13 is consistent with the pressure inside the housing 41, the flatness of the housing 41 can be adjusted by the pulling assembly 11, and the pulling assembly 11 is not separated from the housing 41.

According to some embodiments of the present application, referring to fig. 2 to 14, the present application provides a flatness adjusting apparatus, a drawing part 12 is provided at the bottom of a drawing piece 11, and a second limiting part 112 is provided at the middle part; the adjusting piece 22 is sleeved on the outer wall of the second limiting part 112, the second limiting part 112 is limited through the first limiting part 221, and the fixing piece 21 is connected to the outer wall of the adjusting piece 22 through threads; the connecting portion 31 is screwed to the fixing member 21 and is locked by a washer and a nut, and the connecting portion 31, the supporting portion 32 and the protecting portion 33 are integrally connected.

When the flatness adjusting device adjusts the flatness of the shell 41 of the battery monomer 4, the drawing part 12 is controlled to be attracted with the concave part 410 on the shell 41; the adjusting member 22 is rotated to move in a direction away from the fixing member 21, and in the moving process, the first limiting portion 221 limits the second limiting portion 112 to drive the drawing member 11 and the drawing portion 12 to move in a direction away from the recessed portion 410, so as to draw the recessed portion 410.

Those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than others, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (13)

1. A flatness adjustment apparatus, comprising:

a drawing assembly (1);

the adjusting component (2) is sleeved on the drawing component (1), and the adjusting component (2) is used for driving the drawing component (1) to move so that the drawing component (1) draws the concave part (410) on the shell (41) of the battery cell (4) and improves the flatness of the shell (41);

the supporting component (3) is sleeved on the adjusting component (2), and the supporting component (3) is used for supporting the adjusting component (2) and the drawing component (1).

2. The flatness adjustment device according to claim 1, characterized in that the drawing assembly (1) includes:

the drawing piece (11) is connected with the adjusting component (2);

the drawing part (12) is connected with the drawing piece (11), and the drawing part (12) is used for drawing the concave part (410) along with the movement of the drawing piece (11).

3. Flatness adjustment device according to claim 2, characterized in that the pulling element (11) and the pulling part (12) each have a cavity (13), the cavity (13) being adapted to receive a negative pressure for engaging the pulling part (12) with the recessed portion (410).

4. Flatness adjustment device according to claim 3, characterized in that the pull (11) further has sealing means (14), which sealing means (14) are adapted to seal the cavity (13) when it contains underpressure.

5. The flatness adjustment apparatus according to claim 2, wherein the drawing part (12) has an adsorption cavity (15) and an adsorption ear (16), the adsorption ear (16) is used for generating a negative pressure in the adsorption cavity (15) to attract the drawing part (12) with the recess portion (410).

6. Flatness adjustment device according to claim 2, characterized in that the end of the pull-off part (12) remote from the pull-off piece (11) is provided with an adhesive (17), said adhesive (17) being used to connect the recess (410) with the pull-off part (12).

7. Flatness adjustment device according to any of claims 2-6, characterized in that the puller (11) is provided with a gauge (111), the gauge (111) being adapted to indicate the displacement of the puller assembly (1) movement.

8. The flatness adjustment device according to claim 7, characterized in that the adjustment assembly (2) includes:

a fixing member (21) connected to the support member (3);

the adjusting piece (22) is movably connected with the fixing piece (21) and connected with the drawing piece (11), and the adjusting piece (22) is used for driving the drawing piece (11) to move.

9. The flatness adjustment apparatus according to claim 8, wherein the adjustment member (22) has a first stopper portion (221) therein, and the outer wall of the drawing member (11) has a second stopper portion (112), and the first stopper portion (221) is used for stopping the second stopper portion (112).

10. The flatness adjustment device according to claim 2, wherein the support assembly (3) includes:

a connecting portion (31) connected to the adjustment assembly (2);

a support portion (32) connected to the connecting portion (31), the support portion (32) being configured to support the drawing assembly (1) and the adjustment assembly (2).

11. The flatness adjustment device according to claim 10, wherein the support portion (32) is retractable, the support portion (32) including at least:

the first supporting part (321) is connected with the connecting part (31) and forms an included angle with the drawing assembly (1);

the second supporting part (322) is movably connected with the first supporting part (321), and the second supporting part (322) is used for adjusting the length of the supporting part (32).

12. The flatness adjustment device according to claim 10 or 11, characterized in that the support assembly (3) further includes a guard portion (33); the protection part (33) is used for preventing the support component (3) from slipping when in supporting.

13. A formation apparatus comprising the flatness adjustment device according to any one of claims 1 to 12.

Images