Hot pressing mechanism and hot pressing device

Abstract

The utility model discloses a hot-pressing mechanism and a hot-pressing device, and relates to the technical field of battery cell hot-pressing, the hot-pressing mechanism comprises a base, a hot-pressing assembly, a first film clamping assembly, a driving assembly and a jacking assembly; the hot-pressing assembly comprises a first hot-pressing piece and a second hot-pressing piece; the first film clamping assembly is arranged on the base and is used for arranging a first film between the first hot pressing piece and the battery cell; the jacking assembly comprises a driving piece and a jacking piece, and the jacking assembly is arranged on the base. After hot pressing, the driving assembly drives the first thin film to be away from the first hot-pressing piece, and the driving piece controls the jacking piece to move between the first thin film and the first hot-pressing piece; the driving assembly drives the first thin film to approach the first hot-pressing piece, the battery cell cannot approach the first hot-pressing piece due to the fact that the jacking piece supports the part of the battery cell, the first thin film continues to approach the first hot-pressing piece under the action of the driving assembly, and the first thin film is gradually separated from the part, not supported by the jacking piece, of the battery cell; and separation of the first thin film and the battery cell after hot pressing is facilitated.

Description

Technical Field

[0001] This utility model belongs to the technical field of battery hot pressing, and specifically relates to a hot pressing mechanism and hot pressing device. Background Technology

[0002] Cell hot pressing is an important process in lithium battery production. Cell hot pressing requires placing the stacked cells in a hot pressing mechanism and setting the parameters of the hot pressing mechanism to press the positive and negative electrode plates and the separator together, so that the positive and negative electrode plates and the separator are tightly attached. The hot-pressed cells are then used in the next process.

[0003] After hot pressing, the high temperature can cause the battery cell to stick to the heating element of the hot pressing mechanism, thus affecting the battery cell unloading process. Related technologies use an anti-stick film to isolate the heating element and the battery cell in the hot pressing mechanism, preventing them from sticking and improving unloading efficiency; however, the film is difficult to detach from the battery cell during the unloading process. Utility Model Content

[0004] The purpose of this utility model is to provide a hot pressing mechanism to solve one or more technical problems existing in the prior art.

[0005] The technical solution adopted to solve the above-mentioned technical problems is as follows:

[0006] The first aspect of this utility model provides a hot pressing mechanism, comprising:

[0007] Base;

[0008] The hot-pressing assembly includes a first hot-pressing component and a second hot-pressing component; the first hot-pressing component and the second hot-pressing component are disposed on the base along the hot-pressing direction, and a hot-pressing station for the battery cell is formed between the first hot-pressing component and the second hot-pressing component.

[0009] A first membrane assembly is disposed on the base and is used to arrange a first thin film between the first hot-pressing member and the battery cell;

[0010] A driving component, disposed on the base, is used to drive the first film closer to or away from the first hot press;

[0011] The top support assembly includes a driving member and a top support member, which is disposed on the base. After hot pressing, the top support member moves between the first film and the first hot pressing member under the drive of the driving member, and the top support member can support part of the battery cell through the first film.

[0012] According to the hot pressing mechanism of this utility model embodiment, the top support further includes a sliding part and a top support part connected to each other, the sliding part being connected to the driving part of the driving member; along the hot pressing direction, the cross-sectional area of ​​the top support part is smaller than the cross-sectional area of ​​the battery cell.

[0013] According to the hot pressing mechanism of this utility model embodiment, along the moving direction of the top support member, the width of the top support is smaller than the width of the battery cell.

[0014] According to the hot pressing mechanism of this utility model embodiment, a gap is formed between the top support and the first hot pressing member along the hot pressing direction.

[0015] According to the hot pressing mechanism of this utility model embodiment, a guide rail is provided on the base, the guide rail is arranged adjacent to the first hot pressing member, and the length of the guide rail is greater than the dimension of the first hot pressing member in the length direction of the guide rail.

[0016] According to the hot pressing mechanism of this utility model embodiment, there are two sliding parts and two guide rails. The two sliding parts are respectively disposed on the corresponding guide rails, and the two guide rails are respectively disposed on opposite sides of the first hot pressing member. One end of the top support is connected to one of the sliding parts, and the other end is connected to the other sliding part.

[0017] According to the hot pressing mechanism of this utility model embodiment, the top support is strip-shaped, one end of the top support is connected to one of the sliding parts, and the other end is connected to the other sliding part.

[0018] According to the hot pressing mechanism of this utility model embodiment, there are two driving members, one of which has a driving part connected to one of the sliding parts, and the other driving member has a driving part connected to the other sliding part.

[0019] According to the hot pressing mechanism of this utility model embodiment, the first film clamping assembly includes two tensioning members, one end of the first film is wound around one of the tensioning members, and the other end is wound around the other tensioning member, so that the first film is taut; the driving assembly is used to drive the tensioning members away from or close to the first hot pressing member.

[0020] A second aspect of this utility model provides a hot pressing device, including a base and at least two hot pressing mechanisms as described in the first aspect embodiment, wherein the hot pressing mechanisms are disposed on the base along the hot pressing direction.

[0021] The present invention has at least the following beneficial effects:

[0022] The first film is used to isolate the first hot-pressing component and the battery cell, preventing the battery cell from sticking to the first hot-pressing component after hot pressing. After hot pressing, the driving component drives the first film away from the first hot-pressing component, and the battery cell located on the first film moves away from the first hot-pressing component accordingly. The driving component controls the top support to move between the first film and the first hot-pressing component. The driving component drives the first film closer to the first hot-pressing component. Because the top support supports the battery cell, the battery cell cannot get close to the first hot-pressing component. Under the action of the driving component, the first film continues to get closer to the first hot-pressing component and gradually separates from the battery cell, which is conducive to the separation of the first film and the battery cell after hot pressing. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0024] Figure 1 This is a schematic diagram of the overall structure of the hot pressing mechanism provided in this embodiment of the utility model;

[0025] Figure 2 This is an exploded view of the hot pressing mechanism provided in this embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the overall structure of the hot pressing mechanism provided in another embodiment of the present utility model;

[0027] Figure 4 This is one of the simplified schematic diagrams illustrating the use of the hot pressing mechanism provided in this embodiment of the utility model;

[0028] Figure 5 This is a simplified schematic diagram of the use process of the hot pressing mechanism provided in this embodiment of the utility model;

[0029] Figure 6 This is a schematic diagram of the overall structure of the top support assembly of the hot pressing mechanism provided in this embodiment of the utility model;

[0030] Figure 7 This is a schematic diagram of the overall structure of the hot pressing device provided in this embodiment of the utility model.

[0031] The following labels are shown in the attached diagram:

[0032] 10. Hot pressing mechanism; 11. Base;

[0033] 100. Base; 110. Top plate; 120. Bottom plate; 130. Guide rail;

[0034] 200. Hot pressing assembly; 210. First hot pressing component; 220. Second hot pressing component; 230. Hot pressing station;

[0035] 300, First membrane clamping assembly; 310, First film; 320, Tensioning element;

[0036] 400. Driver components;

[0037] 500, Top support assembly; 510, Drive component; 520, Top support component; 521, Sliding part; 522, Top support part;

[0038] 600. Battery cell; 610. Part 1; 620. Part 2;

[0039] 700, Second membrane assembly; 710, Second film;

[0040] a. Hot pressing direction; b. Moving direction of the top support. Detailed Implementation

[0041] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0042] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the mechanism or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] In the description of this utility model, the use of terms such as "several" means one or more, with "multiple" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the quantity of indicated technical features, or the sequential relationship between indicated technical features.

[0044] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0045] Reference Figures 1 to 3The first aspect of this utility model provides a hot pressing mechanism 10, which includes a base 100, a hot pressing assembly 200, a first clamping assembly 300, a driving assembly 400, and a top support assembly 500. The hot pressing assembly 200 includes a first hot pressing component 210 and a second hot pressing component 220. The first hot pressing component 210 and the second hot pressing component 220 are disposed on the base 100 along the hot pressing direction a, and a hot pressing station 230 for a battery cell 600 is formed between the first hot pressing component 210 and the second hot pressing component 220. The first clamping assembly 300 is disposed on the base 100. It is used to arrange the first film 310 between the first hot pressing member 210 and the battery cell 600; the driving assembly 400 is disposed on the base 100 and is used to drive the first film 310 to move closer to or away from the first hot pressing member 210; the top support assembly 500 includes the driving member 510 and the top support member 520, and the top support assembly 500 is disposed on the base 100; after hot pressing, the top support member 520 moves between the first film 310 and the first hot pressing member 210 under the drive of the driving member 510, and the top support member 520 can support part of the battery cell 600 through the first film 310.

[0046] The first film 310 is used to isolate the first hot-pressing member 210 and the battery cell 600, preventing the battery cell 600 from sticking to the first hot-pressing member 210. After hot pressing, the driving component 400 drives the first film 310 away from the first hot-pressing member 210, and the battery cell 600 located on the first film 310 moves away from the first hot-pressing member 210 accordingly. The driving component 510 controls the top support member 520 to move between the first film 310 and the first hot-pressing member 210. The driving component 400 drives the first film 310 closer to the first hot-pressing member 210. Since the top support member 520 supports part of the battery cell 600, the battery cell 600 cannot get close to the first hot-pressing member 210. Under the action of the driving component 400, the first film 310 continues to get closer to the first hot-pressing member 210, and the first film 310 gradually separates from the part of the battery cell 600 that is not supported by the top support member 520, which is conducive to the separation of the first film 310 and the battery cell 600 after hot pressing.

[0047] Reference Figures 4 to 5The portion of the battery cell 600 supported by the top support member 520 is designated as the first portion 610, and the portion not supported by the top support member 520 is designated as the second portion 620. When the top support member 520 moves between the first film 310 and the first hot press member 210, the top support member 520 can support the first portion 610, preventing the battery cell 600 from moving with the first film 310. When the first film 310 is between the battery cell 600 and the top support member 520, and the drive assembly 400 drives the first film 310 closer to the first hot press member 210, the first film 310 separates from the second portion 620 because the top support member 520 only supports a portion of the battery cell 600 and not the entire battery cell 600. In the subsequent unloading process, the battery cell 600 is gripped by a robotic arm, completely detaching the battery cell 600 from the first film 310.

[0048] Reference Figure 1 and Figure 3 The base 100 includes a top plate 110 and a bottom plate 120. A first hot pressing component 210 is disposed on the bottom plate 120, and a second hot pressing component 220 is disposed on the top plate 110. In this embodiment of the invention, the first hot pressing component 210 and the second hot pressing component 220 are used to hot press the battery cell 600 on the hot pressing station 230. The hot pressing mechanism 10 may include a second clamping assembly 700, which is disposed on the top plate 110. The second clamping assembly 700 is used to arrange a second film 710 between the second hot pressing component 220 and the battery cell 600. The second film 710 is used to prevent the second hot pressing component 220 from sticking to the battery cell 600. After hot pressing, the second hot pressing component 220 and the second film 710 move away from the battery cell 600, so that the second film 710 can be separated from the battery cell 600. Under the action of gravity, the battery cell 600 still stays on the first film 310, making it difficult for the first film 310 and the battery cell 600 to separate. In this embodiment of the invention, after hot pressing, the first film 310 is driven away from the first hot pressing member 210 by the driving component 400, so that the top support member 520 can move between the first hot pressing member 210 and the first film 310 under the drive of the driving component 510. Subsequently, the driving component 400 drives the first film 310 closer to the first hot pressing member 210. Since the top support member 520 can support the first part 610 of the battery cell 600, the battery cell 600 cannot get close to the first hot pressing member 210. The first film 310, which is attached to the second part 620 of the battery cell 600, is gradually detached from the battery cell 600 under the action of the driving component 400.

[0049] If the battery cell 600 is directly gripped by a robotic arm after hot pressing, it is difficult to completely detach the first film 310 from the battery cell 600. During the unloading process, the first film 310 is prone to sticking to the battery cell 600. However, in this embodiment of the invention, the cooperation of the drive component 400 and the top support component 520 allows the first film 310 to detach from the second part 620 of the battery cell 600 first. In the subsequent unloading process, the robotic arm can directly grip the battery cell 600, thereby detaching the first film 310 from the first part 610 of the battery cell 600, thus achieving the separation of the battery cell 600 and the first film 310, and reducing the adhesion of the first film 310 to the battery cell 600 during the unloading process. In related technologies, directly removing the battery cell 600 during the feeding process and forcibly separating the first film 310 from the battery cell 600 can easily lead to damage to the first film 310 and partial adhesion to the battery cell 600, which is not conducive to the reuse of the first film 310. However, in the embodiment of this application, the battery cell 600 is supported by the top support member 520, and the first film 310 is pulled by the drive component 400, so that the first film 310 gradually separates from the battery cell 600, reducing the probability of damage to the first film 310.

[0050] It should be noted that during the hot pressing process, such as Figure 4 As shown, the top support 520 is located outside the hot pressing station 230 to prevent it from obstructing the hot pressing process. The first hot pressing component 210 and the second hot pressing component 220 can be heating plates used for hot pressing.

[0051] Reference Figure 2 In some embodiments, the top support 520 further includes a sliding portion 521 and a top support portion 522 connected to each other. The sliding portion 521 is connected to the driving portion of the driving member 510. Along the hot pressing direction a, the cross-sectional area of ​​the top support portion 522 is smaller than the cross-sectional area of ​​the battery cell 600, so that the top support portion 522 can only support a portion of the battery cell 600. When the first film 310 moves closer to the first hot pressing member 210, the portion of the battery cell 600 not supported by the top support portion 522 can be separated from the first film 310, which is beneficial for the battery cell 600 to completely detach from the first film 310 during unloading.

[0052] Reference Figure 2In some embodiments, along the moving direction b of the top support member 520, the width of the top support portion 522 is smaller than the width of the battery cell 600. During the hot pressing process, the top support member 520 moves outside the hot pressing station 230. By limiting the width of the top support portion 522, the size of the top support portion 522 in the moving direction b of the top support member 520 can be reduced, the volume occupied by the top support member 520 can be reduced, and thus the overall volume of the hot pressing mechanism 10 can be reduced. The smaller the width of the top support portion 522, the smaller the area of ​​the part of the top support portion 522 supporting the battery cell 600. When the driving component 400 drives the first film 310 close to the first hot pressing member 210, the larger the area of ​​the part of the battery cell 600 that separates from the first film 310 is, which is more conducive to the separation of the first film 310 and the battery cell 600.

[0053] Reference Figure 2 In some embodiments, a gap is formed between the top support 522 and the first hot-pressing member 210 along the hot-pressing direction a, so that the battery cell 600 can be isolated from the first hot-pressing member 210 after hot pressing, avoiding damage to the battery cell 600 caused by the heat on the first hot-pressing member 210; in addition, the above arrangement can also reduce the interference of the first hot-pressing member 210 on the top support 522, and avoid the first hot-pressing member 210 from hindering the movement of the top support 520.

[0054] Reference Figure 2 In some embodiments, a guide rail 130 is provided on the base 100, adjacent to the first hot-pressing member 210. The guide rail 130 guides the movement path of the top support member 520. The sliding part 521 slides on the guide rail 130, causing the top support member 522 to move between the first film 310 and the first hot-pressing member 210. The length of the guide rail 130 is greater than the dimension of the first hot-pressing member 210 in the length direction of the guide rail 130, so that the sliding part 521 can drive the top support member 522 from above the first hot-pressing member 210 to the outside of the first hot-pressing member 210, avoiding the top support member 520 from interfering with the hot-pressing operation. Specifically, the guide rail 130 can be provided on the base plate 120.

[0055] Reference Figures 1 to 3 In some embodiments, two sliding parts 521 and guide rails 130 are provided. The two sliding parts 521 are respectively disposed on the corresponding guide rails 130, and the two guide rails 130 are respectively disposed on opposite sides of the first hot-pressing member 210. One end of the top support is connected to one of the sliding parts 521, and the other end is connected to the other sliding part 521. By restricting the path of the two sliding parts 521 by the two guide rails 130, the stability of the movement of the top support member 520 can be improved.

[0056] Reference Figure 6In some embodiments, the top support 522 is strip-shaped, with one end connected to one of the sliding parts 521 and the other end connected to another sliding part 521. This strip-shaped design, while still providing support for the battery cell 600, minimizes the width of the top support 522. The sliding parts 521 are connected to the ends of the top support 522, which, while ensuring the stability of the sliding motion of the top support 522, reduces its length, thereby reducing the volume of the top support member 520.

[0057] Reference Figures 1 to 3 In some embodiments, two drive members 510 are provided. The drive portion of one drive member 510 is connected to one sliding portion 521, and the drive portion of the other drive member 510 is connected to the other sliding portion 521. By driving the two sliding portions 521 with the two drive members 510 respectively, both ends of the top support 522 are subjected to thrust and move, thereby improving the stability of the movement of the top support 520. Generally, the drive member 510 is a telescopic cylinder, and the output shaft of the telescopic cylinder is connected to the sliding portion 521.

[0058] Reference Figures 1 to 3 In some embodiments, the first film clamping assembly 300 includes two tensioning members 320. One end of the first film 310 is wound around one tensioning member 320, and the other end is wound around the other tensioning member 320, so that the first film 310 is taut. The driving assembly 400 is used to drive the tensioning member 320 away from or towards the first hot-pressing member 210. By directly driving the tensioning member 320 through the driving assembly 400, the first film 310 can be moved away from or towards the first hot-pressing member 210. The driving assembly 400 is disposed on the base plate 120, and there are two driving assemblies 400. One driving assembly 400 is used to drive one tensioning member 320 away from or towards the first hot-pressing member 210, and the other driving assembly 400 is used to drive the other tensioning member 320 away from or towards the first hot-pressing member 210. The two driving assemblies 400 can accelerate the separation efficiency of the battery cell 600 and the first film 310. Among them, the drive component 400 is a telescopic cylinder, and the tensioning component 320 is a tensioning mechanism in the prior art.

[0059] Understandably, after hot pressing, the top support 520 moves between the first film 310 and the first hot pressing member 210, and the top support 522 supports the middle part of the battery cell 600. The two sides of the battery cell 600 do not contact the top support 522. Figure 5 As shown, the drive assembly 400 drives the tensioner 320 to move closer to the first hot presser 210, so that the first film 310 separates from the two sides of the cell 600.

[0060] Reference Figure 7The second aspect of this utility model provides a hot-pressing device, including a base 11 and at least two hot-pressing mechanisms 10 as described in the first aspect embodiment. The hot-pressing mechanisms 10 are disposed on the base 11 along the hot-pressing direction a. The provision of multiple hot-pressing mechanisms 10 can improve the efficiency of the hot-pressed battery cell 600. The base 11 can be a support frame, providing support for the multiple hot-pressing mechanisms 10.

[0061] It is understood that since the hot pressing mechanism 10 has the beneficial effects of the above embodiments, the hot pressing device will have the corresponding beneficial effects of the above embodiments. The specific implementation method can be referred to the above embodiments, and will not be repeated in this application.

[0062] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A hot-pressing mechanism characterized by comprising: The application relates to a hot-pressing mechanism. The hot-pressing mechanism comprises a base, a hot-pressing assembly, a first film clamping assembly, a driving assembly and a top supporting assembly. The hot-pressing assembly comprises a first hot-pressing part and a second hot-pressing part. The first hot-pressing part and the second hot-pressing part are arranged on the base along a hot-pressing direction, and a hot-pressing position of a battery cell is formed between the first hot-pressing part and the second hot-pressing part. The first film clamping assembly is arranged on the base and used for arranging a first film between the first hot-pressing part and the battery cell. The driving assembly is arranged on the base and used for driving the first film to move close to or away from the first hot-pressing part. The top supporting assembly comprises a driving part and a top supporting part, and the top supporting assembly is arranged on the base. After hot pressing, the top supporting part moves to the position between the first film and the first hot-pressing part under the driving of the driving part, and the top supporting part can support part of the battery cell through the first film.

2. The hot press mechanism according to claim 1, wherein The top supporting part further comprises a sliding part and a top supporting part which are connected with each other.

3. The hot press mechanism of claim 2, wherein, The sliding part is connected with a driving part of the driving part.

4. The hot press mechanism of claim 2, wherein, Along the hot-pressing direction, the area of the cross section of the top supporting part is smaller than the area of the cross section of the battery cell.

5. The hot press mechanism of claim 2, wherein Along the moving direction of the top supporting part, the width of the top supporting part is smaller than the width of the battery cell.

6. The hot press mechanism of claim 5, wherein, Along the hot-pressing direction, a gap is formed between the top supporting part and the first hot-pressing part.

7. The hot press mechanism of claim 6, wherein, The base is provided with guide rails which are arranged adjacent to the first hot-pressing part, and the length of the guide rails is greater than the size of the first hot-pressing part in the length direction of the guide rails.

8. The hot press mechanism of claim 7, wherein, The sliding part and the guide rail are provided with two sliding parts which are arranged on the corresponding guide rails respectively, and the two guide rails are arranged on the opposite sides of the first hot-pressing part respectively.

9. Hot-pressing mechanism according to any one of claims 1 to 8, characterized in that One end of the top supporting part is connected with one of the sliding parts, and the other end is connected with the other sliding part.

10. Hot-pressing apparatus, characterized in that The driving part is provided with two driving parts, one end of one of the driving parts is connected with one of the sliding parts, and the other end of the other driving part is connected with the other sliding part. The first film clamping assembly comprises two tensioning parts, one end of the first film is arranged around one of the tensioning parts, and the other end is arranged around the other tensioning part, so that the first film is tight. The driving assembly is used for driving the tensioning parts to move away from or close to the first hot-pressing part. The application further relates to a hot-pressing mechanism. The hot-pressing mechanism comprises a base and at least two hot-pressing mechanisms according to any one of claims 1 to 9, and the hot-pressing mechanisms are arranged on the base along a hot-pressing direction.

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