A hot press table diaphragm anti-sticking pressing plate and hot press table device

Abstract

The application discloses a hot-pressing table diaphragm anti-sticking pressing plate and a hot-pressing table device, and relates to the technical field of battery production, in particular to a hot-pressing table diaphragm anti-sticking pressing plate and a hot-pressing table device. The hot-pressing table diaphragm anti-sticking pressing plate comprises a wear-resistant insulation layer, which forms a base layer and is used for providing strength and toughness for the whole diaphragm anti-sticking pressing plate and playing an insulation and anti-static role; a flexible deformation layer, which is attached to the wear-resistant insulation layer to form an intermediate layer, is configured to guarantee the uniformity of the compaction of the battery cell by using its micro-deformation when the thickness of the battery cell is uneven, and prevent the formation of micro-vacuum between the diaphragm anti-sticking pressing plate and the battery cell; and an electrostatic dredging layer, which is attached to the flexible deformation layer to form a surface layer, is configured to be in contact with the battery cell to dredge the static electricity on the battery cell. The application analyzes the cause of the diaphragm adhesion of the hot-pressing table from the principle and fundamentally solves the problem of the diaphragm adhesion of the hot-pressing table. The diaphragm anti-sticking pressing plate and the hot-pressing table device are simple in overall structure, do not damage the traditional hot-pressing overall structure, are economical and practical in material use, simple in manufacturing method, and convenient to replace when in use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power battery manufacturing, in particular to a hot pressing table diaphragm anti-sticking pressing plate and a hot pressing table device comprising the same. BACKGROUND

[0002] With the continuous development of the lithium battery industry, the safety of the battery and the quality of the battery cell are increasingly required. The preparation process of high-quality battery cells requires increasingly strict control. After the traditional hot pressing table device completes the hot pressing of the battery cell without adhesive, the hot pressing plate is extremely easy to stick and lift the diaphragm of the first and last layers of the battery cell when the hot pressing plate is opened, causing the diaphragm to fold and wrinkle, and the battery cell to leak black, thereby affecting the performance and appearance of the battery cell.

[0003] Currently, there are also ways to change the surface treatment of the hot pressing plate to solve this problem in the prior art, but the effect is not obvious. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a hot pressing table diaphragm anti-sticking pressing plate, which aims to avoid adsorbing the diaphragm and / or causing the diaphragm to drift irregularly when the hot pressing plate is opened.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a hot pressing table diaphragm anti-sticking pressing plate, comprising: a wear-resistant insulating layer forming a base layer for providing strength and toughness to the entire diaphragm anti-sticking pressing plate and serving as an insulating anti-static layer; a flexible deformation layer attached to the wear-resistant insulating layer to form an intermediate layer, the flexible deformation layer being configured to ensure uniform compaction of the battery cell when the thickness of the battery cell is uneven by using its micro-deformation to prevent the formation of a micro-vacuum between the diaphragm anti-sticking pressing plate and the battery cell; and an electrostatic dissipation layer attached to the flexible deformation layer to form a surface layer, the electrostatic dissipation layer being configured to be in contact with the battery cell to dissipate static electricity on the battery cell.

[0007] As a preferred embodiment, the wear-resistant insulating layer is made of Teflon high-temperature cloth, and the thickness of the Teflon high-temperature cloth is not greater than 0.2 mm.

[0008] With the above structure, the Teflon high-temperature cloth has the advantages of high temperature resistance, wear resistance, and repeated pulling without deformation, and provides strength and toughness to the entire pressing plate.

[0009] As a preferred embodiment, the flexible deformation layer is made of a silica gel plate, and the thickness of the silica gel plate is not greater than 1 mm.

[0010] With the above structure, the silica gel plate has high temperature resistance, aging resistance, and easy deformation and rebounding, and when the thickness of the battery cell is uneven, the micro-deformation can be used to ensure the uniformity of the battery cell compaction.

[0011] Preferably, the electrostatic dissipation layer is made of conductive silk, and the thickness of the conductive silk is not greater than 0.01 mm.

[0012] With the above structure, the conductive silk has high temperature resistance, wear resistance, low glue content, and good electrostatic dissipation capacity.

[0013] In a second aspect, the present application provides a manufacturing method of the hot press table diaphragm anti-sticking pressing plate of the first aspect, including the following steps:

[0014] The wear-resistant insulation layer, the flexible deformation layer, and the electrostatic dissipation layer are sequentially stacked, and the edges of the three are trimmed in size according to requirements;

[0015] The three are integrally stitched within a certain range from the edges of the wear-resistant insulation layer, the flexible deformation layer, and the electrostatic dissipation layer;

[0016] The edges of the three are pre-pressed with small pressure within a certain range from the edges, and then are finally pressed with large pressure.

[0017] In a third aspect, the present application provides a hot press table device, including a hot press table body composed of an upper pressing plate, a lower pressing plate, an upper top block, and a lower top block, and an upper diaphragm anti-sticking pressing plate and a lower diaphragm anti-sticking pressing plate are respectively arranged on the upper pressing plate and the upper top block and on the lower pressing plate and the lower top block, and the upper diaphragm anti-sticking pressing plate and the lower diaphragm anti-sticking pressing plate are both the hot press table diaphragm anti-sticking pressing plate of the first aspect of the present application.

[0018] Preferably, connecting pieces are arranged on the two side edges of the upper diaphragm anti-sticking pressing plate and the lower diaphragm anti-sticking pressing plate, and the connecting pieces are used to be connected with external stretching mechanisms.

[0019] With the above structure, the upper diaphragm anti-sticking pressing plate and the lower diaphragm anti-sticking pressing plate can be flatly attached to the upper pressing plate and the lower pressing plate respectively.

[0020] In a fourth aspect, the present application provides a use method of the hot press table device of the third aspect, including the following steps:

[0021] The upper pressing plate and the lower pressing plate of the hot press table body are opened, and the upper diaphragm anti-sticking pressing plate and the lower diaphragm anti-sticking pressing plate are respectively arranged on the upper pressing plate and the lower pressing plate.

[0022] After the lower top block is lifted, the battery cell is placed into the hot press table body, and the battery cell is placed on the lower diaphragm anti-sticking pressing plate at the position of the lower top block.

[0023] The lower top block is lowered to be flush with the lower pressing plate, and the upper pressing plate and the lower pressing plate are closed;

[0024] After the hot pressing table body is closed, the hot pressing table body is heated and pressed according to the hot pressing process parameters, and the pressure is maintained. During the hot pressing process, the electrostatic dissipation layer of the upper side diaphragm anti-adhesion pressing plate and the lower side diaphragm anti-adhesion pressing plate are respectively in contact with the upper and lower surfaces of the battery cell, so as to effectively dissipate the static electricity on the battery cell. At the same time, the flexible deformation layer uses its micro-deformation to ensure the uniformity of the compaction of the battery cell, and prevents the formation of micro-vacuum between the electrostatic dissipation layer and the battery cell.

[0025] After the set time, the upper pressing plate and the lower pressing plate are opened, the battery cell is taken out, and a hot pressing cycle is completed.

[0026] The present application has the following advantages due to the above technical scheme:

[0027] 1. The hot pressing table diaphragm anti-adhesion pressing plate provided by the present application is composed of Teflon high-temperature cloth, silica gel plate and conductive silk, which can fundamentally eliminate static electricity, avoid the adsorption of diaphragm by hot pressing static electricity, and effectively reduce the resistance of breaking vacuum when the hot pressing plate is opened, thereby avoiding the drift of the diaphragm.

[0028] 2. The diaphragm anti-adhesion pressing plate and the hot pressing table device of the present application have simple overall structure, do not damage the traditional hot pressing overall structure, use economical and practical materials, have simple manufacturing method, and are convenient to replace during use. BRIEF DESCRIPTION OF DRAWINGS

[0029] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Throughout the drawings, the same reference designators are used to denote like elements. In the drawings:

[0030] Figure 1 The structure schematic view of the hot pressing table diaphragm anti-adhesion pressing plate provided by an embodiment of the present application is shown in the figure.

[0031] Figure 2 The overall structure schematic view of the hot pressing table device provided by an embodiment of the present application is shown in the figure.

[0032] Figure 3 The state schematic view of the hot pressing table device provided by an embodiment of the present application when opened is shown in the figure.

[0033] Figure 4 The state schematic view of the hot pressing table device provided by the embodiment of the present application when closed is shown in the figure.

[0034] Reference numerals in the figure:

[0035] 1-wear-resistant insulation layer; 2-flexible deformation layer; 3-static electricity dissipation layer; 4-upper pressing plate; 5-lower pressing plate; 6-upper top block; 7-lower top block; 8-electric core; 9-upper side diaphragm anti-sticking pressing plate; 10-lower side diaphragm anti-sticking pressing plate; 11-connector. DETAILED DESCRIPTION

[0036] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0037] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the systems or elements 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 present application.

[0038] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "assembly", "arrangement", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In view of the problems in the background art, the inventors found through repeated research and many tests that the reason why the hot pressing plate is extremely easy to stick the diaphragm of the first and last layers of the electric core is as follows: (1) Microstatic electricity is generated during the transfer of the electric core, and the hot pressing plate uses static electricity to adsorb the thin diaphragm; (2) Micro-vacuum may be formed between the hot pressing plate and the electric core, and due to the fact that the resistance of breaking the vacuum is greater than the adhesion force of the diaphragm and the pole piece, the diaphragm moves irregularly. The present application analyzes the cause of diaphragm sticking of the hot pressing table from the principle, and fundamentally solves the problem of diaphragm anti-sticking of the hot pressing table.

[0040] Next, the diaphragm anti-sticking pressing plate of the hot pressing table provided by the embodiments of the present application will be described in detail in conjunction with the drawings.

[0041] Embodiment one:

[0042] Please refer to Figure 1The heat pressing table diaphragm anti-sticking pressing plate provided by the embodiment comprises a wear-resistant insulating layer 1, a flexible deformation layer 2 and an electrostatic dissipation layer 3. The wear-resistant insulating layer 1 is a base layer, which is configured to provide strength and toughness for the whole diaphragm anti-sticking pressing plate and to play an insulating and anti-static role. The flexible deformation layer 2 is an intermediate layer, which is attached to the wear-resistant insulating layer 1. The flexible deformation layer 2 is configured to guarantee the uniformity of the compaction of the battery cell by using its micro-deformation when the thickness of the battery cell is uneven, so as to prevent the formation of micro-vacuum between the pressing plate and the battery cell. The electrostatic dissipation layer 3 is a surface layer, which is attached to the flexible deformation layer 2. The electrostatic dissipation layer 3 is configured to be in contact with the battery cell to dissipate static electricity on the battery cell.

[0043] In the above embodiment, preferably, the wear-resistant insulating layer 1 is made of Teflon high-temperature cloth, and the thickness of the Teflon high-temperature cloth is not greater than 0.2 mm, for example, 0.1 mm, 0.12 mm, 0.15 mm, 0.18 mm or 0.2 mm, etc. The Teflon high-temperature cloth has the advantages of high temperature resistance, wear resistance, repeated pulling without deformation, insulation and anti-static, and providing strength and toughness for the whole pressing plate.

[0044] In the above embodiment, preferably, the flexible deformation layer 2 is made of a silica gel plate, and the thickness of the silica gel plate is not greater than 1 mm, for example, 0.2 mm, 0.35 mm, 0.5 mm, 0.75 mm or 1 mm, etc. The silica gel plate has the advantages of high temperature resistance, aging resistance, easy deformation and easy rebound, and can guarantee the uniformity of the compaction of the battery cell by using its micro-deformation when the thickness of the battery cell is uneven.

[0045] In the above embodiment, preferably, the electrostatic dissipation layer 3 is made of conductive silk, and the thickness of the conductive silk is not greater than 0.01 mm, for example, 0.003 mm, 0.005 mm, 0.008 mm or 0.01 mm, etc. The conductive silk has the advantages of high temperature resistance, wear resistance, low glue content and good electrostatic dissipation ability.

[0046] Embodiment two:

[0047] Based on the heat pressing table diaphragm anti-sticking pressing plate provided by the above embodiment one, the embodiment of the second aspect of the present application further provides a manufacturing method of the heat pressing table diaphragm anti-sticking pressing plate, which comprises the following steps:

[0048] S100. sequentially stack the wear-resistant insulating layer 1, the flexible deformation layer 2 and the electrostatic dissipation layer 3, and trim the edges of the three layers according to the required size;

[0049] S200. within a range of 5 mm from the edges of the wear-resistant insulating layer 1, the flexible deformation layer 2 and the electrostatic dissipation layer 3, the three layers are integrally sewn;

[0050] S300. in a range of 5 mm from the edges of the three layers, small pressure (for example, 1T) pre-pressing is performed in a press-sealing manner, and then large pressure (for example, 10T) final pressing is performed, so as to guarantee the service life of the whole pressing plate.

[0051] Embodiment three

[0052] Based on the heat press table diaphragm anti-sticking pressing plate provided in the above embodiment one, the embodiment of the third aspect of the present application further provides a heat press table device, please refer to Figure 2 、 Figure 3 The heat press table device can include a heat press table body composed of an upper pressing plate 4, a lower pressing plate 5, an upper top block 6 and a lower top block 7, an upper diaphragm anti-sticking pressing plate 9 and a lower diaphragm anti-sticking pressing plate 10 are respectively arranged on the upper pressing plate 4 and the upper top block 6 and the lower pressing plate 5 and the lower top block 7, and the upper diaphragm anti-sticking pressing plate 9 and the lower diaphragm anti-sticking pressing plate 10 are both the heat press table diaphragm anti-sticking pressing plate in the above embodiment one. The wear-resistant insulating layer 1 of the upper diaphragm anti-sticking pressing plate 9 and the lower diaphragm anti-sticking pressing plate 10 is respectively close to one side of the upper pressing plate 4 and the lower pressing plate 5, and the static electricity dissipation layer 3 is close to one side of the battery cell 8.

[0053] In the above embodiment, preferably, connecting pieces 11 are arranged on both sides of the upper diaphragm anti-sticking pressing plate 9 and the lower diaphragm anti-sticking pressing plate 10, the connecting pieces 11 are used to be connected with external stretching mechanisms, so that the upper diaphragm anti-sticking pressing plate 9 and the lower diaphragm anti-sticking pressing plate 10 can be flatly attached to the upper pressing plate 4 and the lower pressing plate 5 respectively.

[0054] It should be noted that the implementation mode of the heat press table diaphragm anti-sticking pressing plate embodiment is also applicable to the embodiment of the heat press table device, and the same technical effects can be achieved, which will not be described here.

[0055] Embodiment four

[0056] Based on the heat press table device provided in the above embodiment three, the embodiment of the fourth aspect of the present application further provides a use method of the heat press table device, which includes the following steps:

[0057] (1) please refer to Figure 3 , open the upper pressing plate 4 and the lower pressing plate 5 of the heat press table body, and arrange the upper diaphragm anti-sticking pressing plate 9 and the lower diaphragm anti-sticking pressing plate 10 on the upper pressing plate 4 and the lower pressing plate 5 respectively.

[0058] (2) After the lower top block 7 is lifted, the mechanical hand puts the battery cell 8 into the heat press table body, and the battery cell 8 is placed on the lower diaphragm anti-sticking pressing plate 10 at the position of the lower top block 7, the mechanical hand is separated from the gap between the lower top block 7 and the lower diaphragm anti-sticking pressing plate 10, and the mechanical hand leaves the heat press table body.

[0059] (3) After the mechanical hand leaves the heat press table body, the lower top block 7 is lowered to be flush with the lower pressing plate 5, and the upper pressing plate 4 and the lower pressing plate 5 are closed to Figure 4 state.

[0060] (4) After the hot-pressing table body is closed, the hot-pressing mechanism heats, presses and keeps pressure according to the hot-pressing process parameters. During the hot-pressing process, the electrostatic dissipation layer 3 of the upper side diaphragm anti-sticking pressing plate 9 and the lower side diaphragm anti-sticking pressing plate 10 respectively contacts the upper and lower surfaces of the battery cell 8, so that the electrostatic on the battery cell 8 can be effectively dissipated; at the same time, the flexible deformation layer 2 can guarantee the compaction uniformity of the battery cell 8 by using the micro deformation, so as to prevent the micro vacuum from being formed between the electrostatic dissipation layer 3 and the battery cell 8.

[0061] (5) After the set time, the upper pressing plate 4 and the lower pressing plate 5 are opened, and the mechanical hand takes away the battery cell 8, so that a hot-pressing cycle is completed.

[0062] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A hot platen diaphragm release platen characterized by, The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate. The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate. The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate. The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate. The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate.

2. The hot platen diaphragm release press plate of claim 1, wherein, The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate.

3. The hot platen press diaphragm release platen of claim 1 wherein, The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate.

4. The hot platen diaphragm release press plate of claim 1 wherein, The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate.

5. A method of manufacturing a release platen for a hot press table according to any one of claims 1 to 4, wherein The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate. The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate. The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate. The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate.

6. A hot press apparatus comprising a hot press body composed of an upper platen, a lower platen, an upper ram, and a lower ram, characterized by The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate.

7. The hot platen apparatus of claim 6, wherein, The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate.

8. A method of using a hot platen apparatus as claimed in claim 6 or 7, characterized in that, The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate. The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate. The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate. The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate. The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate. The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate. The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate. The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate. The application relates to a heat-pressing platform diaphragm anti-sticking pressing plate. 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