Local hot pressing mechanism

Abstract

The utility model relates to the technical field of battery production, and discloses a local hot-pressing mechanism which comprises a hot-pressing plate and a hot-pressing platform, the hot pressing plate is arranged on the hot pressing platform and is used for performing hot pressing on materials; and a heat conduction area is locally arranged on the hot pressing plate. According to the scheme, local hot pressing can be conducted on multiple layers of materials through the hot pressing plate, and secondary displacement of the multiple layers of materials in the transferring process is avoided; meanwhile, in the embodiment, the heat conduction area is arranged on the local part of the hot pressing plate, so that gas can be discharged from other areas during hot pressing, the expansion gas generated in the hot pressing process is prevented from influencing materials, and the local hot pressing effect is ensured.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery production, and in particular to a local hot pressing mechanism. BACKGROUND

[0002] Hot pressing refers to a process of pressing materials such as pole pieces and diaphragms at high temperature. Before hot pressing, the pole pieces and diaphragms need to be laminated or wound to form a battery cell. The laminated material has a multi-layer structure, and in the process of transferring from the logistics line to the hot pressing platform, the internal multi-layer material will be moved again, which will reduce the alignment of the internal multi-layer material of the battery cell and affect the performance of the battery cell. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the application aims to provide a local hot pressing mechanism to solve the problem of internal multi-layer material moving again before hot pressing of the battery cell.

[0004] To achieve the above technical purpose, the application provides a local hot pressing mechanism, which comprises a hot pressing plate and a hot pressing platform.

[0005] The hot pressing plate is arranged on the hot pressing platform and is used for hot pressing of the material.

[0006] A local part of the hot pressing plate is provided with a heat conduction area.

[0007] Further, the heat conduction area comprises a first part and / or a second part.

[0008] The first part is continuously distributed.

[0009] The second part is dispersedly distributed.

[0010] Further, the first part comprises a plurality of horizontal lines and a plurality of vertical lines.

[0011] The horizontal lines and the vertical lines intersect with each other.

[0012] Further, the second part comprises a plurality of point-shaped heat conduction areas arranged in a matrix.

[0013] Further, the hot pressing platform comprises a base, an extension column, a top seat and a downward driving device.

[0014] The extension column is arranged on the base.

[0015] The top seat is arranged on the extension column.

[0016] The hot pressing plate is arranged at the bottom of the top seat.

[0017] The output end of the downward driving device is connected to the top seat, and the top seat is driven to ascend and descend.

[0018] Further, a second hot platen is included;

[0019] The second hot platen is used for placing materials;

[0020] When performing a local hot pressing process, the second hot platen is located below the hot platen;

[0021] The heat conduction area is arranged at the bottom of the hot platen;

[0022] The top of the second hot platen is partially provided with a second heat conduction area.

[0023] Further, a conveying mechanism is included;

[0024] The conveying mechanism includes a conveying channel and a conveying driver;

[0025] The conveying channel passes below the hot platen;

[0026] The output end of the conveying driver is connected to the second hot platen, and is used to drive the second hot platen to move along the conveying channel.

[0027] Further, the conveying mechanism includes a vertical plate;

[0028] The second hot platen is arranged on the vertical plate in a liftable manner;

[0029] The output end of the conveying driver is connected to the vertical plate.

[0030] Further, the second hot platen includes two;

[0031] The conveying mechanism includes two conveying drivers and two vertical plates;

[0032] The output ends of the two conveying drivers are respectively connected to the two vertical plates;

[0033] The two second hot platens are respectively arranged on the two vertical plates;

[0034] The two conveying drivers are used to drive the two vertical plates to alternately enter the hot pressing platform.

[0035] Further, the second heat conduction area includes a continuously distributed continuous part and / or a dispersedly distributed dispersed part.

[0036] As can be seen from the above technical solutions, the present application provides a local hot pressing mechanism, which includes a hot platen and a hot pressing platform; the hot platen is arranged on the hot pressing platform and is used to hot press materials; and a heat conduction area is arranged on a part of the hot platen.

[0037] In the scheme, the multi-layer material can be locally hot-pressed by the hot-pressing plate, avoiding secondary displacement of the multi-layer material during the transfer process. Meanwhile, in the embodiment, the heat-conducting area is arranged locally on the hot-pressing plate, so that the gas can be discharged from other areas during hot-pressing, avoiding the influence of the expansion gas generated during the hot-pressing process on the material, thereby ensuring the effect of local hot-pressing. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0039] Figure 1 A schematic diagram of a hot-pressing platform and a hot-pressing plate of a local hot-pressing mechanism provided by the embodiment of the present application;

[0040] Figure 2 A schematic diagram of a hot-pressing plate of a local hot-pressing mechanism provided by the embodiment of the present application;

[0041] Figure 3 A schematic diagram of a second hot-pressing plate of a local hot-pressing mechanism provided by the embodiment of the present application;

[0042] Figure 4 A schematic diagram of the overall structure of a local hot-pressing mechanism provided by the embodiment of the present application;

[0043] Figure 5 A schematic diagram of a local hot-pressing mechanism after removing the top seat provided by the embodiment of the present application;

[0044] Figure 6 A schematic diagram of a local hot-pressing mechanism provided by the embodiment of the present application;

[0045] In the drawings:

[0046] 10, hot-pressing plate; 11, heat-conducting area; 12, first part; 121, horizontal line; 122, vertical line; 13, second part; 131, dot-shaped heat-conducting area;

[0047] 20, hot-pressing platform; 21, base; 22, telescopic column; 23, top seat;

[0048] 30, second hot-pressing plate; 31, second heat-conducting area; 32, continuous part; 33, dispersed part;

[0049] 40, conveying mechanism; 41, conveying channel; 42, conveying driver; 43, vertical plate; 431, longitudinal guide rail. DETAILED DESCRIPTION

[0050] The technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0051] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0052] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or replaceable connection, or integral connection, it can be mechanical connection, or electrical connection, it can be direct connection, or indirect connection through an intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0053] Please refer to Figure 1 With Figure 2 In the embodiments of the present application, a local hot pressing mechanism is provided, which comprises a hot pressing plate 10 and a hot pressing platform 20. The hot pressing plate 10 is arranged on the hot pressing platform 20 and is used for hot pressing the material; and a heat conduction area 11 is arranged locally on the hot pressing plate 10.

[0054] In the present embodiment, a heating pipe is arranged in the hot pressing plate 10; and the heating pipe transmits heat to the heat conduction area 11 after heating. When the heat conduction area 11 contacts with the material, the material is locally hot pressed. Taking the material including multiple pole pieces and diaphragms as an example, the local hot pressing can improve the local contact state between the pole pieces and the diaphragms. Before any hot pressing is performed, there are some microscopic unevenness and gas gap on the surface of the pole pieces and the diaphragms. Through local hot pressing, these areas can first realize close contact in a small range, so that the pole pieces and the diaphragms are closely attached in the part contacting with the heat conduction area 11, which can improve the volume energy density of the material on the one hand, and improve the connection firmness of the pole pieces and the diaphragms on the other hand, thereby avoiding the internal secondary movement of the material during the process of transferring to the hot pressing platform.

[0055] Meanwhile, since the separator is a thin body, it will expand when heated, making it difficult to be compacted; moreover, the gas generated by the expansion of the separator cannot be discharged, which will also cause the offset of the electrode sheets and the separator in other layers. In this embodiment, only a local heat-conducting area 11 is provided on the hot pressing plate 10. When hot pressing the material, the gas generated by the expansion of the material can be discharged from the non-heat-conducting area, achieving a better local hot pressing effect.

[0056] In a more specific embodiment, the heat-conducting area 11 includes: a first part 12 and / or a second part 13; the first part 12 is continuously distributed; the second part 13 is dispersedly distributed.

[0057] The first part 12 can provide a relatively stable and uniform heat transfer path, ensuring uniform heat distribution and the firmness of the connection of the material after hot pressing. The second part 13 can increase the heat-conducting area under the condition of affecting the discharge of the expansion gas, improving the local hot pressing effect and further preventing the material from experiencing secondary displacement.

[0058] In one embodiment, the first part 12 includes: a plurality of horizontal lines 121 and a plurality of vertical lines 122; the horizontal lines 12 and the vertical lines 122 intersect with each other. Specifically, there can be one horizontal line 121, such that the first part 12 forms a continuously extending cross-shaped pattern. In this embodiment, the first part 12 is in the shape of a line, having the effects of wide coverage area and good gas dispersion.

[0059] In one embodiment, the second part 13 includes a plurality of dot-shaped heat-conducting areas 131 distributed in a matrix, which can improve the local hot pressing efficiency and expand the hot pressing coverage area.

[0060] It should be noted that the dot-shaped heat-conducting areas 131 can be connected to the first part 12.

[0061] As an implementation manner, the way for the hot pressing plate 10 to perform local hot pressing on the material can be that the material approaches the hot pressing plate 10

[0062] In another implementation manner, the way for the hot pressing plate 10 to perform local hot pressing on the material can be that the hot pressing plate 10 is driven by a lifting driver to press down, that is, the hot pressing plate 10 is arranged on the hot pressing platform 20 in a liftable manner.

[0063] Specifically, please refer to Figure 1 , the hot pressing platform 20 includes: a base 21, a telescopic column 22, a top seat 23 and a downward pressing driver; the telescopic column 22 is arranged on the base 21; the top seat 23 is arranged on the telescopic column 22; the hot pressing plate 10 is arranged at the bottom of the top seat 23; the output end of the downward pressing driver is connected to the top seat 23, and is used to drive the top seat 23 to lift.

[0064] The downward driving device can be a cylinder or the like. Before being transferred to the hot-pressing platform, the material can be transferred to the lower side of the hot-pressing plate 10 by a transfer mechanism such as a robot. Then, the downward driving device drives the top base 23 and the hot-pressing plate 10 to move downward, and the telescopic column 22 is gradually shortened until the hot pressing is completed.

[0065] In a more specific embodiment, referring to Figure 3 , the partial hot-pressing mechanism further comprises a second hot-pressing plate 30. The second hot-pressing plate 30 is used to place the material. During the partial hot-pressing process, the second hot-pressing plate 30 is located below the hot-pressing plate 10. The heat-conducting area 11 is arranged at the bottom of the hot-pressing plate 10. The top of the second hot-pressing plate 30 is partially provided with a second heat-conducting area 31.

[0066] The second hot-pressing plate 30 can perform partial hot pressing on the bottom of the material. During hot pressing, pressure acts on the material from two directions. This two-way pressure can make the particles (such as active material particles and conductive agent particles of the pole piece) in the material more closely arranged. At the same time, partial hot pressing from the bottom and the top helps the heat transfer in the material and helps the heat to penetrate into the material more quickly.

[0067] Optionally, the second heat-conducting area 31 comprises a continuous part 32 and / or a dispersed part 33. Specifically, the second heat-conducting area 31 can adopt the same layout as the heat-conducting area 11, and the second heat-conducting area 31 and the heat-conducting area 11 can have different sizes.

[0068] In this embodiment, the heat-conducting area 11 and the second heat-conducting area 31 are symmetrical structures, which helps to ensure the uniformity of the heating of the material.

[0069] As an implementation, the second hot-pressing plate 30 can be fixed below the hot-pressing plate 10. During the partial hot-pressing process, the material is transferred to the second hot-pressing plate 30 by other transfer mechanisms.

[0070] As another implementation, referring to Figure 4 and Figure 5 , the partial hot-pressing mechanism further comprises a conveying mechanism 40. The conveying mechanism 40 comprises a conveying channel 41 and a conveying driver 42. The conveying channel 41 passes below the hot-pressing plate 10. The output end of the conveying driver 42 is connected to the second hot-pressing plate 30, and is used to drive the second hot-pressing plate 30 to move along the conveying channel 41.

[0071] In the embodiment, the conveying channel 41 comprises a first station and a second station; the first station is located outside the hot-pressing platform 20 and is used for feeding, that is, when the second hot-pressing plate 30 is located at the first station, the conveying mechanism can transfer the material to the first station. The second station is located inside the hot-pressing platform 20 and is used for hot-pressing. The conveying channel 41 can convey the second hot-pressing plate 30 between the first station and the second station.

[0072] In one embodiment, the first station can be used as a pre-positioning station of the material, that is, the pole piece and the diaphragm can be pre-positioned and contacted at the first station.

[0073] In a further improved embodiment, please refer to Figures 4 to 6 The conveying mechanism 40 comprises: a vertical plate 43; the second hot-pressing plate 30 is arranged on the vertical plate 43 in a liftable manner; and the output end of the conveying driver 42 is connected to the vertical plate 43.

[0074] Correspondingly, the vertical plate 43 can be provided with a jacking driver (not shown in the figure), and the jacking driver can drive the second hot-pressing plate 30 to lift up, so that when the local hot-pressing process is performed, the second hot-pressing plate 30 can lift up the material upward, so as to improve the local hot-pressing effect on the material and improve the hot-pressing efficiency.

[0075] Optionally, the vertical plate 43 is provided with a longitudinal guide rail 431; the longitudinal guide rail 431 is used for guiding the sliding of the vertical plate 43.

[0076] In one embodiment, the second hot-pressing plate 30 comprises two; the conveying mechanism 40 comprises two conveying drivers 42 and two vertical plates 43; the output ends of the two conveying drivers 42 are respectively connected to the two vertical plates 43; the two second hot-pressing plates 30 are respectively arranged on the two vertical plates 43; and the two conveying drivers 42 are used for driving the two vertical plates 43 to alternately enter the hot-pressing platform 20.

[0077] By arranging two second hot-pressing plates 30, the operation efficiency of the local hot-pressing process can be improved.

[0078] As an implementation manner, the conveying channel 41 can be annular; the two second hot-pressing plates 30 are conveyed along the annular conveying channel 41, so as to alternately enter the hot-pressing platform 20.

[0079] As an implementation manner, the conveying channel 41 is linear; the second hot-pressing plate 30 reciprocates on the conveying channel 41. When the two second hot-pressing plates 30 are alternated, one second hot-pressing plate 30 is lifted up by the jacking driver, and the other second hot-pressing plate 30 is lowered by the jacking driver, so that the two second hot-pressing plates 30 do not interfere with each other when they are alternated.

[0080] As an implementation, two second hot pressing plates 30 can be respectively arranged on two sides of the conveying channel 41, and one side of the conveying channel 41 is provided with a cam groove; when the vertical plate 43 connected with one second hot pressing plate 30 slides through the cam groove, the vertical plate 43 is guided to rise or fall by the cam groove, so that one second hot pressing plate 30 avoids the other second hot pressing plate 30, and the alternation of the two is realized.

[0081] The above is the preferred embodiment of the present application and is not used to limit the present application, although the present application is described in detail with reference to the examples, for those skilled in the art, the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced, but any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A local hot-pressing mechanism, characterized by, The utility model relates to a heat pressing device, including: A heat pressing plate (10) and a heat pressing platform (20); The heat pressing plate (10) is arranged on the heat pressing platform (20) and is used for heat pressing materials; A heat conduction area (11) is arranged on the heat pressing plate (10); The heat conduction area (11) includes a first part (12); The first part (12) is continuously distributed; The first part (12) includes a plurality of horizontal lines (121) and a plurality of vertical lines (122); The horizontal lines (121) and the vertical lines (122) intersect each other.

2. The local hot pressing mechanism according to claim 1, wherein The heat conduction area (11) includes a second part (13); The second part (13) is dispersedly distributed.

3. The local hot pressing mechanism according to claim 2, wherein The second part (13) includes a plurality of point-shaped heat conduction areas (131) arranged in a matrix.

4. The local hot pressing mechanism of claim 1, wherein The heat pressing platform (20) includes a base (21), a telescopic column (22), a top base (23) and a downward driving device; The telescopic column (22) is arranged on the base (21); The top base (23) is arranged on the telescopic column (22); The heat pressing plate (10) is arranged at the bottom of the top base (23); The output end of the downward driving device is connected to the top base (23) and is used for driving the top base (23) to ascend and descend.

5. The local hot pressing mechanism according to any one of claims 1 to 4, wherein A second heat pressing plate (30) is further included; The second heat pressing plate (30) is used for placing materials; When a local heat pressing process is performed, the second heat pressing plate (30) is located below the heat pressing plate (10); The heat conduction area (11) is arranged at the bottom of the heat pressing plate (10); A second heat conduction area (31) is arranged on the top of the second heat pressing plate (30).

6. The local hot pressing mechanism according to claim 5, wherein Further included are: A conveying mechanism (40); The conveying mechanism (40) includes a conveying channel (41) and a conveying driving device (42); The conveying channel (41) passes below the heat pressing plate (10); The output end of the conveying driving device (42) is connected to the second heat pressing plate (30) and is used for driving the second heat pressing plate (30) to move along the conveying channel (41).

7. The local hot pressing mechanism according to claim 6, wherein The conveying mechanism (40) includes a vertical plate (43); The second heat pressing plate (30) is arranged on the vertical plate (43) in a liftable manner; The output end of the conveying driving device (42) is connected to the vertical plate (43).

8. The local hot pressing mechanism according to claim 7, wherein The second heat pressing plate (30) includes two; The conveying mechanism (40) includes two conveying driving devices (42) and two vertical plates (43); The output ends of the two conveying driving devices (42) are respectively connected to the two vertical plates (43); The two second heat pressing plates (30) are respectively arranged on the two vertical plates (43); The two conveying driving devices (42) are used for driving the two vertical plates (43) to alternately enter the heat pressing platform (20).

9. The local hot pressing mechanism of claim 5, wherein, The second heat conduction area (31) includes a continuously distributed continuous part (32) and / or a dispersedly distributed dispersed part (33).

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