CN221282183U

CN221282183U - Hot press device

Info

Publication number: CN221282183U
Application number: CN202322875313.9U
Authority: CN
Inventors: 高勇
Original assignee: Sany Technology Equipment Co Ltd
Current assignee: Sany Technology Equipment Co Ltd
Priority date: 2023-10-25
Filing date: 2023-10-25
Publication date: 2024-07-05
Anticipated expiration: 2033-10-25

Abstract

The utility model discloses a hot pressing device, which comprises a first pressing plate and a second pressing plate which are oppositely arranged, wherein a space for placing a workpiece is formed between the first pressing plate and the second pressing plate; and a pressing part, the output shaft of which is connected with at least one of the first pressing plate and the second pressing plate, the pressing part drives the first pressing plate and the second pressing plate to be relatively close to or far away from each other; the device further comprises a spherical connecting piece, one end of the spherical connecting piece is connected with the output shaft of the pressing part, and the other end of the spherical connecting piece is connected with at least one of the first pressing plate and the second pressing plate, so that the first pressing plate and/or the second pressing plate are tightly attached to the workpiece. According to the utility model, the spherical connecting piece is arranged between the pressing mechanism and the pressing plate, so that the pressing plate has multidirectional angle adjustment capability, the pressing plate can be self-adaptively leveled, and the service life of the device can be prolonged.

Description

Hot press device

Technical Field

The utility model relates to the technical field of hot pressing, in particular to a hot pressing device.

Background

After the lithium ion power battery is wound or laminated, the bare cell is mostly required to be subjected to hot press shaping, the hot press shaping process is called a hot press process for short, and corresponding equipment is a hot press. In order to ensure the shaping effect of the battery cell, the uniform pressure of the battery cell is required to be ensured during hot pressing, so that the levelness of a hot pressing surface is required to be high. If the levelness deviation of the hot-pressed surface is large, the levelness of the hot-pressed surface cannot be quickly adjusted, and the pressure of the battery cell is easily uneven, so that the product quality is affected.

Due to reasonable errors in the production process and the assembly process, the hot pressing surface of the hot pressing device is difficult to ensure complete level. Typically, the levelness of the hot-pressed surface needs to be adjusted manually by using a silicon steel gasket or a leveling screw. The leveling method is time-consuming and labor-consuming, and is inconvenient in that the silicon steel gaskets or leveling screws are detached when the hot pressing device is required to be overhauled and maintained, and reinstallation and leveling are required after the overhauling or the maintenance.

The prior pressing device comprises a pressing plate assembly, a pressing mechanism and a leveling mechanism, wherein the leveling mechanism comprises a flexible piece, the flexible piece is arranged between the pressing plate assembly and the pressing mechanism, and the pressing mechanism can deform during pressing so as to adjust the levelness of the pressing plate assembly. In practical application, the flexible part is mainly an inflatable plastic tire body, but because the working environment and the working temperature of the pressing device are higher, the service life of the plastic tire body is not long, the aging of the plastic tire body can be accelerated by high temperature and multiple deformations, once the outer wall of the tire body is cracked, the whole plastic tire body can be scrapped, and the tire body needs to be replaced. The cost of frequently replacing the plastic carcass and the influence on the production beat during replacement and maintenance are very large.

Disclosure of utility model

The utility model aims to overcome the defects that the service life of a plastic tire body on the existing pressing device is short and frequent replacement is needed, and provides the hot pressing device.

The technical scheme adopted by the utility model is as follows: the hot pressing device comprises a pressing plate assembly, wherein the pressing plate assembly comprises a first pressing plate and a second pressing plate which are oppositely arranged, and a space for placing a workpiece is formed between the first pressing plate and the second pressing plate;

A pressing part, an output shaft of which is connected with at least one of the first pressing plate and the second pressing plate, and the pressing part drives the first pressing plate and the second pressing plate to be relatively close to or far away from each other;

Still include spherical connecting piece, spherical connecting piece one end and the output shaft of exerting pressure portion are connected, and the other end is connected in at least one of first pressboard and second pressboard to make first pressboard and/or second pressboard and work piece closely laminate, avoid the uneven to work piece atress when the lamination, cause the damage of work piece.

The working principle of the hot pressing device is as follows: the first pressing plate and the second pressing plate are oppositely arranged in parallel along the same direction, wherein the first pressing plate and the second pressing plate are of flat plate structures and are provided with pressing surfaces for being abutted against a workpiece (namely an electric core). The output shaft of the pressing part is connected with at least one of the first pressing plate and the second pressing plate, that is, two pressing parts can be respectively arranged on one hot pressing device, and the pressing parts are connected with the pressing plates in a one-to-one correspondence. Of course, it is more common in practice to provide a pressing portion, and an output shaft of the pressing portion is connected to one of the pressing plates, and the other pressing plate is fixedly provided, so that the two pressing plates (i.e., the first pressing plate and the second pressing plate) are relatively close to or far from each other, so as to implement pressing of the workpiece. Wherein, the spherical connecting piece between the pressing part and the pressing plate component can deflect towards any direction in space, thereby adjusting different supporting directions. When one of the pressing plates applies a pressing resultant force to the workpiece, after the pressing plate is inclined, one end inclined downwards is firstly contacted with the workpiece and is subjected to a reaction force of the workpiece, so that the spherical connecting piece is subjected to an upward force on one side, and accordingly deflection occurs, the other end of the pressing plate is rapidly contacted with the workpiece, leveling is performed, and the first pressing plate and the second pressing plate can be enabled to be capable of extruding the workpiece in parallel. The spherical connecting piece can be made of high-strength metal or nonmetal materials, so that the service life of the spherical connecting piece is prolonged, and the frequency of replacing parts are reduced.

It should be noted that, for the case of setting up two pressure portions and respectively with first pressfitting board, second pressfitting board connection, the spherical connecting piece can only set up on one of them pressfitting board, avoids having two sets of accommodation simultaneously, causes the increase of control requirement.

In addition, after the workpiece (namely the battery cell) is pressed, in order to avoid the retraction and restoration of the battery cell, the first pressing plate and the second pressing plate are both hot pressing plates, and the heating device is arranged in the first pressing plate and the second pressing plate, so that the inside of the battery cell is tightly compacted, and the shaping effect of the battery cell is improved.

Further preferably, the spherical connecting member is a spherical hinge member, also called a spherical hinge.

Further, as one preferable aspect, the spherical connecting member is a self-aligning ball bearing.

Further, the spherical connecting piece comprises a control arm and a knuckle, one end of the knuckle is hinged with the control arm, the other end of the knuckle is fixedly connected with the pressing plate assembly, and the control arm is fixedly connected with the output shaft of the pressing part.

Further, in order to avoid the first pressfitting board to deviate from the second pressfitting board, the device further comprises a top plate and a bottom plate which are arranged in parallel, and a guide column perpendicular to one of the top plate and the bottom plate is connected between the top plate and the bottom plate. The guide post is in sliding connection with one of the top plate or the bottom plate. The top plate may be moved closer to or farther from the bottom plate along the axial direction of the guide post, and of course, the bottom plate may be moved while the top plate is fixed. Of course, the top and bottom plates can also move relatively or inversely along the guide posts simultaneously. The pressing portion is provided on the top plate and is capable of moving along with the top plate.

Further, as another preferable scheme, a guide plate is further arranged between the top plate and the bottom plate, the guide plate is slidably connected to the guide column, the guide plate can slide on the guide column along the extending direction of the guide column, and the guide plate is connected with the output shaft of the pressing part and driven by the pressing part. In this scheme, roof and bottom plate are the fixed setting relatively, only adjust the distance between first pressfitting board and the second pressfitting board through the removal of deflector, and its advantage lies in, because roof, bottom plate and guide post are fixed relatively, and the stability of whole device is good, is difficult for taking place the slope.

Further, the device is also provided with a plurality of elastic mechanisms, one end of each elastic mechanism is connected with any one of the control arm, the output shaft of the pressing part or the guide plate, and the other end of each elastic mechanism is connected with the first pressing plate or the second pressing plate. The elastic mechanism can prevent the pressing plate from shaking when moving up and down, and the relative stability of the first pressing plate or the second pressing plate is guaranteed. Of course, in the case where the guide plate is not provided, one end of the elastic mechanism may be directly connected to the top plate.

Further, the elastic mechanisms are uniformly arranged along the circumferential direction of the first pressing plate or the second pressing plate, that is, the elastic mechanisms can be adaptively adjusted in position according to the shape of the first pressing plate or the second pressing plate.

Further, as one of preferable embodiments, the elastic mechanism includes an air cylinder and a floating joint which are connected to each other, the air cylinder is provided at one side of either the control arm, the output shaft of the pressing portion, or the guide plate toward the platen assembly, and the floating joint is connected to the first platen or the second platen.

Further, as another preferable scheme, the elastic mechanism can also be a spring or a elastic rope for reducing the cost. Of course, a strip or rope of elastic material such as a spring or bungee cord may be used as the elastic means.

Compared with the prior art, the utility model has the beneficial effects that:

1. The utility model adopts the high-strength spherical connecting piece as the leveling component to replace the plastic tire body in the prior art, can fully prolong the service life of the hot pressing device, reduce the replacement times and frequency of the leveling component, ensure the production beat and reduce the production cost;

2. The connecting mode of the spherical connecting piece is utilized, so that the pressing plates have multidirectional angle adjusting capability, the pressing plates can be self-adaptively leveled, the parallelism between the two pressing plates and the fitting degree with a workpiece are ensured, the assembling and the using do not need to be adjusted in advance, and the operation steps are simplified.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of another angle structure of the present utility model;

fig. 3 is a schematic structural diagram of the third embodiment.

In the accompanying drawings:

1-a first press plate; 2-a second press plate; 3-a pressing part; 4-ball connectors; 5-an elastic mechanism; 501-cylinder; 502-floating joint; 6-top plate; 7-a bottom plate; 8-a guide post; 9-a guide plate; 10-cell.

Detailed Description

The utility model is further described below in connection with the following detailed description. Wherein the drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "front", "rear", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances. Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

In the process of hot pressing the battery cells, the inventor of the utility model finds that the hot pressing plate needs to move in a limiting way along the extending direction of the guide assembly, and the hot pressing plate is easy to incline due to the existence of installation errors and the influence of friction force between the hot pressing plate and the guide assembly in the moving process, and once the hot pressing plate inclines, the battery cells are stressed unevenly after being pressed down, so that the battery cells are in poor lamination.

Embodiment one:

in order to solve the above problems, as shown in fig. 1 and 2, the present embodiment provides a hot press apparatus, including:

The pressing plate assembly comprises a first pressing plate 1 and a second pressing plate 2 which are oppositely arranged, a space for placing a workpiece is formed between the first pressing plate 1 and the second pressing plate 2, and specifically, the first pressing plate 1 and the second pressing plate 2 are oppositely arranged in parallel along the same direction, wherein the first pressing plate 1 and the second pressing plate 2 are of flat plate structures and are provided with pressing surfaces for abutting against the battery cells 10;

The pressing part 3 is connected with the first pressing plate 1 through an output shaft, and the pressing part 3 drives the first pressing plate 1 and the second pressing plate 2 to be relatively close to or far away from each other so as to realize pressing of the battery cell 10; in this embodiment, the pressing portion 3 is a press or hydraulic device commonly used in the prior art, which can provide stable pressure, and is a known technology, and will not be described herein;

In addition, still include spherical connecting piece 4, spherical connecting piece 4 one end is connected with the output shaft of pressure portion 3, and the other end is connected in first pressure plate 1 to make first pressure plate 1 closely laminate with electric core 10, avoid the uneven to electric core 10 atress when pressing, cause the damage of electric core 10.

In this embodiment, the second pressing plate 2 is fixedly disposed, and the first pressing plate 1 can be relatively close to or far away from the second pressing plate 2 under the driving of the output shaft of the pressing portion 3. When the first pressing plate 1 moves away from the second pressing plate 2, a space for placing the battery cell 10 is formed between the first pressing plate 1 and the second pressing plate 2, the battery cell 10 is placed on the second pressing plate 2, the battery cell 10 is supported by the second pressing plate 2, then the pressing part 3 drives the first pressing plate 1 to move towards the direction close to the second pressing plate 2, the first pressing plate 1 is abutted to the battery cell 10, and the press fit of the battery cell 10 is realized by the first pressing plate 1 and the second pressing plate 2, so that the flatness of the battery cell 10 is improved, the thickness of the battery cell 10 meets the requirement and has higher consistency, the space utilization rate inside the battery is improved, and the integral energy density of the battery is improved. Meanwhile, the folds of the diaphragm can be eliminated, air in the battery core 10 is removed, the diaphragm, the positive plate and the negative plate are tightly attached together, the diffusion distance of lithium ions is shortened, and the internal resistance of the battery is reduced.

After the battery cell 10 is pressed, in order to avoid the retraction and restoration of the battery cell 10, the first pressing plate 1 and the second pressing plate 2 are both hot pressing plates, and a heating device (not shown in the figure) is arranged in the first pressing plate 1 and the second pressing plate 2, so that the inside of the battery cell 10 is tightly compacted, the battery cell 10 is shaped under the combined action of certain temperature and pressure, the inside of the battery cell 10 is tightly compacted, and the shaping effect of the battery cell 10 is improved.

Wherein the spherical connecting member 4 provided between the pressing portion 3 and the first pressing plate 1 is deflectable in any one direction in space, thereby adjusting different supporting directions. When the first pressing plate 1 is driven by the pressing part 3 to apply a pressing resultant force to the battery cell 10, after the first pressing plate 1 is inclined, one end inclined downwards is firstly contacted with the battery cell 10 and is subjected to a reaction force of the battery cell 10, so that the spherical connecting piece 4 is subjected to an upward force at the same end, and is deflected, the other end of the first pressing plate 1 is rapidly contacted with the battery cell 10, and leveling is performed, and the first pressing plate 1 and the second pressing plate 2 can be enabled to be parallel to press the battery cell 10. The spherical connecting piece 4 can be made of high-strength metal or nonmetal materials, including but not limited to stainless steel, high-carbon steel and reinforced plastic, so that the service life of the spherical connecting piece is prolonged, and the frequency of replacing parts are reduced.

In other embodiments, two pressing parts 3 may be further provided, wherein one pressing part 3 is connected to the first pressing plate 1, the other pressing part 3 is connected to the second pressing plate 2, and the spherical connecting member 4 is provided between the pressing part 3 and at least one of the first pressing plate 1 or the second pressing plate 2.

Embodiment two:

Referring to fig. 1 and 2, the present embodiment provides another hot press apparatus, and in the first embodiment, the spherical connecting member 4 is a spherical hinge, which is commonly known in the art, and is also called a spherical hinge. More specifically, a self-aligning ball bearing is selected as the spherical connecting member 4, and the relative parallelism between the first pressing plate 1 and the second pressing plate 2 is ensured by means of the self-aligning ball bearing. It should be noted that the present invention is not limited to a self-aligning ball bearing, and may be another spherical hinge.

The aligning ball bearing, that is, the spherical connecting piece 4, comprises a control arm and a knuckle, one end of the knuckle is hinged with the control arm, the other end of the knuckle is fixedly connected with the first pressing plate 1, and the control arm is fixedly connected with the output shaft of the pressing part 3. In addition, a plurality of elastic mechanisms 5 are further arranged on the control arm, one end of each elastic mechanism 5 is connected with the control arm, and the other end of each elastic mechanism is connected to the first pressing plate 1. The elastic mechanism 5 can prevent the first pressing plate 1 from shaking when moving up and down, and ensures the relative stability of the first pressing plate 1 and the second pressing plate 2.

The first pressing plate 1 is rectangular, and the elastic mechanisms 5 are uniformly arranged along the circumferential direction of the first pressing plate 1, wherein one specific arrangement mode is that the elastic mechanisms 5 are arranged at the corners of the first pressing plate 1. The elastic means 5 can also function as an auxiliary support in addition to maintaining the stability of the first press plate 1. When the elastic mechanisms 5 receive the forces transmitted from the first pressing plate 1 in different directions, the elastic deformation amounts of the elastic mechanisms 5 are different, so that the spherical connecting piece 4 can be assisted to level the first pressing plate 1.

In other embodiments, the first pressing plate 1 may have other shapes, such as a circle, a diamond, etc.

In this embodiment, the elastic mechanism 5 includes a cylinder 501 and a floating joint 502 which are connected to each other, the cylinder 501 is disposed on a side of the control arm facing the first pressing plate 1, and the floating joint 502 is connected to the first pressing plate 1. In order to optimize the effects of buffering, vibration reduction and improving the dynamic performance of the shafting, the air cylinder 501 and the floating joint 502 are matched for use, so that the condition that the inner wall of the air cylinder 501 is scratched and leakage is caused due to installation errors can be avoided. The floating joint 502 acts as a coupling, which reduces errors, protects related components, maintains smooth operation of the equipment, and extends the service life of the equipment. The floating joint 502 serves to alleviate the eccentricity of the cylinder 501, to make the cylinder 501 and the connecting member (i.e., the control arm and the first pressing plate 1) stably operate within an allowable eccentricity range, and to solve the problem of insufficient balance accuracy, and to keep the operation of the cylinder 501 stable when in operation.

Embodiment III:

As shown in fig. 3, the present embodiment is similar to the embodiment, and the difference is that the elastic mechanism 5 is a spring for reducing the cost. Although the spring has a service life less than that of the cylinder 501 and the floating joint 502 described in the second embodiment, the spring is low in use cost and can be used as a "flat substitute" for the cylinder 501 and the floating joint 502.

Embodiment four:

As shown in fig. 1, 2 or 3, in order to avoid the first laminated plate 1 from deviating from the second laminated plate 2, on the basis of the second or third embodiment, the present embodiment further includes:

a top plate 6, the pressing portion 3 being provided on the top plate 6;

a bottom plate 7, the second pressing plate 2 being provided on the bottom plate 7;

And a guide post 8 provided between the top plate 6 and the bottom plate 7. The top plate 6 and the bottom plate 7 are arranged in parallel, the guide posts 8 are perpendicular to the top plate 6 or the bottom plate 7, and the four guide posts 8 are arranged at four corners of the top plate 6. The top plate 6 may be close to or distant from the bottom plate 7 in the axial direction of the guide post 8. The pressing part 3 is arranged on the top plate 6 and can move along with the top plate 6, and the top plate 6 is provided with a through hole for the output shaft of the pressing part 3 to pass through, and the output shaft passes through the through hole and is connected with the spherical connecting piece 4.

In other embodiments, the number of the guide posts 8 can be correspondingly adjusted according to actual needs.

In this embodiment, the elastic mechanism 5 is disposed at a corner of the first pressing plate 1, one end of the elastic mechanism 5 is connected to the first pressing plate 1, and the other end is connected to the top plate 6 or an output shaft of the pressing portion 3.

Fifth embodiment:

As shown in fig. 1, 2 or 3, on the basis of the second or third embodiment, the present embodiment further includes:

a top plate 6, the pressing portion 3 being provided on the top plate 6;

The four guide posts 8 are arranged between the top plate 6 and the bottom plate 7, and the four guide posts 8 are respectively arranged at four corner positions of the top plate 6;

the guide plate 9, four corner positions of the guide plate 9 are provided with open holes, and the open holes can be sleeved on the guide post 8, so that the guide plate 9 can slide on the guide post 8 along the extending direction of the guide post 8. The guide plate 9 is connected to the output shaft of the pressing portion 3.

In this embodiment, one end of the elastic mechanism 5 is connected to the guide plate 9, and the other end is connected to the first pressing plate 1.

In the specific content of the above embodiment, any combination of the technical features may be performed without contradiction, and for brevity of description, all possible combinations of the technical features are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. A hot press apparatus, comprising:

the pressing plate assembly comprises a first pressing plate (1) and a second pressing plate (2) which are oppositely arranged, and a space for placing a workpiece is formed between the first pressing plate (1) and the second pressing plate (2);

A pressing part (3) with an output shaft connected to at least one of the first pressing plate (1) and the second pressing plate (2), the pressing part (3) driving the first pressing plate (1) and the second pressing plate (2) relatively close to or far away from each other;

The device is characterized by further comprising a spherical connecting piece (4), wherein one end of the spherical connecting piece (4) is connected with an output shaft of the pressing part (3), and the other end of the spherical connecting piece is connected with at least one of the first pressing plate (1) and the second pressing plate (2) so that the first pressing plate (1) and/or the second pressing plate (2) are tightly attached to a workpiece.

2. The hot press according to claim 1, characterized in that the spherical connection (4) is a spherical hinge.

3. The hot press according to claim 1, characterized in that the spherical connection (4) is a self-aligning ball bearing.

4. A hot press according to claim 3, characterized in that the ball joint (4) comprises a control arm and a knuckle, one end of which knuckle is ball-jointed to the control arm and the other end is fixedly connected to a press plate assembly, the control arm being fixedly connected to the output shaft of the press part (3).

5. The hot press according to any one of claims 1 to 4, further comprising a top plate (6) and a bottom plate (7) arranged in parallel, wherein a guiding column (8) perpendicular to one of the top plate (6) and the bottom plate (7) is connected between the top plate (6) and the bottom plate (7), and wherein the top plate (6) and/or the bottom plate (7) are slidably connected with the guiding column (8).

6. The hot press according to any one of claims 1 to 4, further comprising a top plate (6) and a bottom plate (7) arranged in parallel, wherein a guide post (8) perpendicular to one of the top plate (6) and the bottom plate (7) is connected between the top plate and the bottom plate (7), the guide post (8) is slidably connected with a guide plate (9), and the guide plate (9) is connected with the output shaft of the pressing portion (3).

7. The hot press apparatus according to claim 6, further comprising a plurality of elastic mechanisms (5), wherein one end of the elastic mechanism (5) is connected to any one of the control arm, the output shaft of the pressing portion (3), or the guide plate (9), and the other end is connected to the first pressing plate (1) or the second pressing plate (2).

8. The hot press apparatus according to claim 7, wherein the elastic means (5) are uniformly arranged along the circumferential direction of the first press plate (1) or the second press plate (2).

9. The hot press apparatus according to claim 8, wherein the elastic means (5) includes an air cylinder (501) and a floating joint (502) connected to each other, the air cylinder (501) being provided at one side of the control arm, the output shaft of the pressing portion (3), or the guide plate (9) toward the platen assembly, the floating joint (502) being connected to the first platen (1) or the second platen (2).

10. The hot press according to claim 8, characterized in that the elastic means (5) are springs or elastic cords.