Pole piece compounding method and pole piece compounding device

Abstract

The invention discloses a pole piece compositing method and a pole piece compositing device, and the pole piece compositing method comprises the following steps: a feeding part is used for transferring an upper film, a lower film and a pole piece to a hot pressing station, so that the pole piece is positioned between the upper film and the lower film; the hot-pressing part is used for rolling and clamping the upper film and the lower film so that the upper film, the lower film and the pole piece are flatly attached, and the upper film, the lower film and the pole piece in the flatly attached state are hot-pressed by a pressing plate so as to form a battery cell; and the discharging part is used for releasing hot pressing, transferring the battery cell and releasing clamping. According to the pole piece compounding method and the pole piece compounding device, the contact area can be increased, the hot pressing effect is improved, the battery cell is prevented from being damaged, and the compounding quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment for producing battery cells, and in particular to a pole piece composite method and a pole piece composite device. Background Art

[0002] When producing battery cells, a layer of diaphragm is compounded on both sides of the electrode so that the electrode is located between the diaphragms on both sides.

[0003] For a single or single-segment pole piece, during production, the pole piece is first rolled with a layer of diaphragm, and then the pole piece and diaphragm are rolled with the diaphragm on the other side.

[0004] For pole pieces in the form of strips, during production, they can be compounded in the above manner, or they can be compounded by rolling the pole piece and two layers of diaphragms at the same time.

[0005] During lamination, the rollers used for rolling will be heated, that is, hot pressing rollers are used to achieve hot pressing lamination.

[0006] However, the hot pressing roller method has a small contact area, poor hot pressing effect, and the product is easily damaged. Summary of the invention

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a pole piece composite method, which can increase the contact area, improve the hot pressing effect, prevent the battery core from being damaged, and improve the composite quality.

[0008] The present invention also provides a pole piece composite device using the pole piece composite method.

[0009] A pole piece assembly method according to a first aspect of the present invention includes: In the feeding part, the upper film, the lower film and the electrode piece are transferred to the hot pressing station so that the electrode piece is located between the upper film and the lower film; In the hot pressing part, the upper film and the lower film are clamped by rollers to make the upper film, the lower film and the pole piece flat, and the pressing plate hot presses the flatly-attached upper film, the lower film and the pole piece to form a battery cell; In the unloading part, the hot pressing is released, then the battery cells are transferred, and then the roller clamping is released.

[0010] The electrode assembly method according to the embodiment of the present invention has at least the following beneficial effects: The present invention arranges the feeding part so that the pole piece is located between the upper film and the lower film, and also facilitates the completion of the composite by one-time hot pressing, thereby improving the hot pressing efficiency.

[0011] The present invention clamps the upper film and the lower film by rolling to make the upper film, the lower film and the pole piece flat, so that the upper film, the lower film and the pole piece are in a nearly flat plate state, which is convenient for completing the compounding by hot pressing of a pressing plate.

[0012] The present invention can increase the contact area, improve the hot pressing effect, prevent the battery core from being damaged, and improve the composite quality by hot pressing the upper film, the lower film and the pole piece in a flat state through a pressing plate.

[0013] The present invention clamps the upper film and the lower film by roller pressing, and also facilitates timely transfer of the battery cell after releasing the hot pressing, avoiding the upper film and the lower film from being separated again after releasing the roller pressing and clamping, thereby ensuring the composite quality.

[0014] The present invention also provides a pole piece composite device having the above-mentioned beneficial effects.

[0015] According to the pole piece composite method of the first aspect of the present invention, the pole piece is located between the upper film and the lower film, comprising: forming a first gap between the upper film and the lower film, transferring the pole piece to the first gap, and placing the pole piece on the lower film.

[0016] According to the pole piece assembly method of the first aspect of the present invention, the first gap is formed between the upper film and the lower film, comprising: the front pressure roller rises, so that the upper film rises and moves away from the lower film, so as to form the first gap; The roller clamps the upper film and the lower film to make the upper film, the lower film and the pole piece flat, including: the front pressure roller descends, the front pressure roller presses the upper film, so that the upper film descends and approaches the lower film, so that the upper film, the lower film and the pole piece are flat.

[0017] According to the pole piece assembly method of the first aspect of the present invention, the step of transferring the pole piece to the first gap comprises: transferring the pole piece to the first gap along the lower film conveying direction.

[0018] According to the pole piece assembly method of the first aspect of the present invention, the pole piece is transferred to the first gap, including: the pole piece transfer member transfers the pole piece to the first gap, and the pole piece transfer member contacts the upper film through a lifting roller.

[0019] According to the pole piece composite method of the first aspect of the present invention, after the pole piece is placed on the lower film, the lower hot pressing plate absorbs the lower film and the pole piece.

[0020] According to the pole piece composite method of the first aspect of the present invention, the pressing plate hot presses the upper film, lower film and pole piece in a flat state, including: the upper hot pressing plate presses the upper film, lower film and pole piece in a flat state to the lower hot pressing plate for hot pressing.

[0021] According to the pole piece assembly method of the first aspect of the present invention, the upper hot pressing plate and / or the lower hot pressing plate has an elastic pressing block facing the pole piece.

[0022] According to the pole piece assembly method of the first aspect of the present invention, the releasing of rolling clamping comprises: the front pressing roller rises, while the rear pressing roller and the rear supporting roller continue to roll and clamp the battery cell.

[0023] According to the pole piece assembly method of the first aspect of the present invention, the transferring of the battery cell includes: a rear pressing roller and a rear supporting roller rolling and clamping the battery cell for conveying.

[0024] According to the pole piece assembly device of the second aspect of the present invention, any one of the pole piece assembly methods described above is applied.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a schematic structural diagram of a pole piece composite device according to an embodiment of the present invention; Figure 2 for Figure 1 A schematic cross-sectional view of a pole piece composite device; Figure 3 for Figure 1 Schematic diagram of the principle of the pole piece composite device; Figure 4 For application Figures 1 to 3 A process flow chart of a pole piece composite method of a pole piece composite device.

[0028] Figure numerals: upper hot pressing assembly 100; lower hot pressing assembly 110; front support roller 120; front pressure roller 130; rear support roller 140; rear pressure roller 150; first gap 160; pole piece transfer member 170; lifting roller 180; lower hot pressing plate 190; adsorption surface 200; upper hot pressing plate 210; elastic pressure block 220. DETAILED DESCRIPTION

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it is necessary to understand that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of first and second, this is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation, connection and connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The following describes a pole piece assembly device and a battery cell production device according to an embodiment of the present invention in conjunction with the accompanying drawings.

[0034] Reference Figures 1 to 3 The present invention aims to provide an embodiment of a pole piece composite device, which may be a part of a battery cell production equipment. Therefore, the present invention also aims to provide an embodiment of a battery cell production equipment, which includes a pole piece composite device.

[0035] Compared with the prior art, the electrode composite device of the present invention can increase the contact area, improve the thermal pressing effect, prevent the battery cell from being damaged, and improve the composite quality.

[0036] At the same time, a battery cell production equipment of the present invention can also produce the same technical effects by applying the above-mentioned electrode composite device, such as increasing the contact area during hot pressing and improving the hot pressing effect. At the same time, it also makes the overall force of the electrode balanced, the electrode is not easily damaged, and the production quality of the battery cell is improved.

[0037] In this embodiment, the pole piece composite device is used to composite the pole piece between the upper film and the lower film.

[0038] The pole piece may be a pole piece in the form of a strip, or a pole piece in the form of a single piece or a single segment.

[0039] For pole pieces in the form of strips, the pole piece composite device may include a pole piece feeding mechanism, which unwinds the pole pieces in the state of a roll to achieve a continuous supply of pole pieces.

[0040] For single or single-segment electrode sheets, the electrode sheet feeding mechanism may include an electrode sheet transfer member 170. The electrode sheet transfer member 170 takes the electrode sheet by clamping, adsorption, etc., and places the electrode sheet on the lower membrane through lifting and translation movements to meet the electrode sheet supply needs.

[0041] For the upper film, the pole piece composite device may include an upper film feeding mechanism, which unwinds the upper film in a roll state to achieve continuous supply of the upper film.

[0042] For the lower film, the pole piece composite device may include a lower film feeding mechanism, which unwinds the lower film in a roll state to achieve continuous supply of the lower film.

[0043] The upper film feeding mechanism and the lower film feeding mechanism may be understood by referring to the existing diaphragm feeding scheme.

[0044] In some specific embodiments of the present invention, the upper film feeding mechanism, the pole piece feeding mechanism and the lower film feeding mechanism can be arranged vertically to reduce the occupied space.

[0045] To complete the composite, the pole piece composite device includes a hot pressing mechanism, a front rolling assembly and a rear rolling assembly.

[0046] Among them, the hot pressing mechanism includes an upper hot pressing assembly 100 and a lower hot pressing assembly 110. The space between the upper hot pressing assembly 100 and the lower hot pressing assembly 110 can allow the pole piece, the upper membrane and the lower membrane to pass through. The upper hot pressing assembly 100 and the lower hot pressing assembly 110 are heated by clamping from top to bottom.

[0047] In terms of movement, in this embodiment, the upper hot pressing assembly 100 is raised and lowered to complete the hot pressing, but the lower hot pressing assembly 110 may also be raised and lowered to complete the hot pressing, or the upper hot pressing assembly 100 and the lower hot pressing assembly 110 may be raised and lowered simultaneously to close to each other for hot pressing.

[0048] In some specific embodiments of the present invention, the lifting structure of the upper hot pressing assembly 100 or the lower hot pressing assembly 110 can be realized by a motor driving a screw to rotate and the screw driving an upper and lower sliding member with an internal thread.

[0049] In some specific embodiments of the present invention, the upper hot pressing assembly 100 may include an upper hot pressing plate 210, and the lower hot pressing assembly 110 may include a lower hot pressing plate 190. The upper hot pressing plate 210 and / or the lower hot pressing plate 190 may be provided with an elastic pressing block 220, and the elastic pressing block 220 may protrude toward the pole piece.

[0050] It is easy to understand that, in this embodiment, the elastic pressing block 220 is provided to prevent the upper hot pressing plate 210 or the lower hot pressing plate 190 from hard pressing the pole piece, thereby preventing the pole piece from being damaged.

[0051] It is easy to understand that in this embodiment, the elastic pressing block 220 is disposed close to the rear rolling assembly, and the elastic pressing block 220 is disposed away from the front rolling assembly.

[0052] It is easy to understand that this embodiment optimizes the position of the elastic pressing block 220 to meet the need for elastic pressing of the electrode and prevent the elastic pressing block 220 from protruding downward and touching the upper membrane in the conveying state, thereby reducing the risk of damage to the upper membrane.

[0053] The upper hot pressing plate 210 and / or the lower hot pressing plate 190 are provided with the elastic pressing block 220 , and at least one of the upper hot pressing plate 210 and the lower hot pressing plate 190 may be provided with the elastic pressing block 220 .

[0054] In this embodiment, the upper hot pressing plate 210 is provided with an elastic pressing block 220 to adapt to the movement of the upper hot pressing plate 210 in descending hot pressing.

[0055] As for the front roller pressing assembly, the front roller pressing assembly is arranged on the material incoming side of the hot pressing mechanism, and the front roller pressing assembly includes a front supporting roller 120 and a front pressing roller 130 .

[0056] As for the rear roller pressing assembly, the rear roller pressing assembly is arranged at the discharge side of the hot pressing mechanism, and the rear roller pressing assembly includes a rear support roller 140 and a rear pressing roller 150; The front roller pressing assembly and the rear roller pressing assembly clamp the upper film and the lower film up and down to make the upper film and the lower film flatly attached up and down, and then the hot pressing mechanism performs hot pressing and compounding to form a battery cell.

[0057] In this embodiment, the front roller pressing assembly and the rear roller pressing assembly clamp the upper film and the lower film up and down, which is completed by the front pressing roller 130 and the rear pressing roller 150 descending, but combined with the movement mode of the upper hot pressing assembly 100 and the lower hot pressing assembly 110, it can also be completed by the front support roller 120 and the rear support roller 140.

[0058] In some specific embodiments of the present invention, the front pressure roller 130 and the rear pressure roller 150 can be driven to rise and fall by a cylinder, and the movement is fast.

[0059] In summary, this embodiment sets the front roller pressing assembly and the rear roller pressing assembly, so that the upper film and the lower film can form a larger area platform, which is convenient for the hot pressing mechanism to use hot pressing methods other than roller pressing to compound, which helps to increase the contact area and improve the hot pressing effect.

[0060] In this embodiment, a hot pressing mechanism is provided, and the hot pressing mechanism includes an upper hot pressing assembly 100 and a lower hot pressing assembly 110. Therefore, it is convenient to use two pressing plates to press the upper film, the lower film and the pole piece up and down, thereby increasing the contact area and improving the hot pressing line effect.

[0061] At the same time, this embodiment clamps the pole piece as a whole, so that the pole piece is subjected to balanced force and is not easily damaged.

[0062] At the same time, this embodiment can composite the upper film, the lower film and the pole piece at the same time, without the need for two composites, which can simplify the process, reduce the number of equipment, reduce manufacturing costs, and reduce occupied space.

[0063] At the same time, the present embodiment sets up a front roller pressing assembly and a rear roller pressing assembly, so that after the hot pressing is completed, the front roller pressing assembly and the rear roller pressing assembly can keep the upper film and the lower film restricted to avoid being lifted up by the hot pressing mechanism. For example, when the upper hot pressing assembly 100 is away from the upper film, the front roller pressing assembly and the rear roller pressing assembly can restrict the upper film to prevent the upper film from separating from the lower film or the pole piece.

[0064] At the same time, it can also avoid the upper film and the lower film being separated due to the entanglement of the material belt when conveying the battery cell, thereby ensuring the composite quality.

[0065] For the front roller pressing assembly and the rear roller pressing assembly, the front roller pressing assembly and the rear roller pressing assembly can be additional structures, or can be structures belonging to the front process or the rear process, but are located close to the hot pressing mechanism to facilitate changing the state of the upper film and the lower film to meet the needs of hot pressing compounding.

[0066] Regarding the understanding that the front roller assembly and the rear roller assembly clamp the upper and lower films, the front roller assembly and the rear roller assembly can be simultaneously and continuously switching states between clamping and unclamping, or the front roller assembly can be continuously switching states between clamping and unclamping while the rear roller assembly continues to maintain the clamping state.

[0067] The rear roller pressing assembly continues to maintain a clamping state, which helps to maintain the hot pressing composite effect, prevent the upper film from rising when the front pressing roller 130 returns, causing the hot pressed parts to be separated again, and also prevent the lifting roller 180 from lifting the upper film, causing the hot pressed parts to be separated again.

[0068] In this embodiment, the front pressing roller 130 can be raised and lowered, so when the front pressing roller 130 rises to the highest point, a first gap 160 can be formed between the upper film and the lower film at the hot pressing mechanism, and the first gap 160 allows the pole piece to be placed on the lower film. When the front pressing roller 130 falls to the lowest point, the upper film and the lower film can be flatly attached.

[0069] It is easy to understand that in this embodiment, the front pressure roller 130 is raised and lowered, so that after the front pressure roller 130 is raised, a first gap 160 is formed between the upper membrane and the lower membrane, which facilitates the placement of the electrode sheet on the upper membrane. Therefore, the electrode sheet composite device can also be used for the composite of single or single-segment electrode sheets, and still only needs to be composited once, thereby expanding the function of the equipment.

[0070] The understanding of "being able to" should be understood as being able to be achieved when the highest point and the lowest point are reached, but it does not mean that it can only be achieved at the highest point or the lowest point. The corresponding effect can be achieved before reaching the highest point and the lowest point.

[0071] In this embodiment, the front support roller 120 and the rear support roller 140 are arranged at the same height, so that the lower film is in a flat state, the pole piece can be placed, and the pole piece is prevented from sliding on the lower film.

[0072] In some specific embodiments of the present invention, the electrode assembly device may include an electrode transfer member 170, which is used to absorb the electrode. The electrode transfer member 170 can move to the first gap 160 and place the electrode on the lower film.

[0073] It is easy to understand that, in this embodiment, by providing the electrode piece transfer member 170 , the electrode piece can be adsorbed and transferred to the lower film, thus meeting the need for one-time compounding.

[0074] At the same time, the electrode is transferred by adsorption, which makes it convenient to take the electrode and does not occupy the bottom space of the electrode, making it easy to place.

[0075] In some specific embodiments of the present invention, the pole piece transfer member 170 can be moved to the first gap 160 along the conveying direction of the lower film.

[0076] It is easy to understand that this embodiment enables the electrode sheet transfer member 170 to move along the conveying direction of the lower film, thereby facilitating the electrode sheet transfer member 170 to lift the upper film and reduce the probability of damage to the upper film. At the same time, the electrode sheet can be transferred to a position close to the rear rolling assembly, so that more electrode sheets can be placed on the upper film, thereby improving the hot pressing output.

[0077] In some specific embodiments of the present invention, the top and front end of the pole piece transfer member 170 may be smoothed to avoid scratching the upper film.

[0078] In some specific embodiments of the present invention, the pole piece transport member 170 may be provided with a material lifting roller 180 , and the material lifting roller 180 is used to abut against the upper film to separate the upper film from the pole piece transport member 170 .

[0079] It is easy to understand that in this embodiment, the lifting roller 180 is provided, so that the pole piece transport member 170 contacts the upper film through the lifting roller 180. During the transfer of the pole piece transport member 170, the lifting roller 180 rotates to reduce the friction on the upper film and avoid damage to the upper film.

[0080] In some specific embodiments of the present invention, the lower heat pressing assembly 110 may include a lower heat pressing plate 190 , and the apex of the front support roller 120 and / or the rear support roller 140 may be higher than the lower heat pressing plate 190 , so that the lower film is separated from the lower heat pressing plate 190 .

[0081] It is easy to understand that in this embodiment, by making the apex of the front support roller 120 and / or the rear support roller 140 higher than the lower hot pressing plate 190, the lower film can be separated from the lower hot pressing plate 190 without affecting the movement of the lower film, avoiding the lower hot pressing plate 190 from contacting and heating the lower film for a long time, avoiding deformation or shrinkage of the lower film due to heat, and avoiding deformation of the lower film that affects the accuracy.

[0082] The apex of the front support roller 120 and / or the rear support roller 140 is higher than the lower hot pressing plate 190 , which means that at least one of the two satisfies the positional relationship and can achieve the effect of separating the lower film from the lower hot pressing plate 190 .

[0083] In some specific embodiments of the present invention, the upper hot pressing assembly 100 may include an upper hot pressing plate 210, and the low point of the front pressing roller 130 and / or the rear pressing roller 150 may be lower than the upper hot pressing plate 210 to separate the upper hot pressing plate 210 from the upper film.

[0084] It is easy to understand that in this embodiment, the lower point of the front pressure roller 130 and / or the rear pressure roller 150 is made lower than the upper hot pressing plate 210, so that the upper hot pressing plate 210 is separated from the upper film, which does not affect the movement of the upper film and also avoids the upper hot pressing plate 210 from contacting and heating the upper film for a long time, thereby preventing the upper film from being deformed or shrinking due to heat and affecting the accuracy of the upper film.

[0085] The low point of the front pressure roller 130 and / or the rear pressure roller 150 is lower than the upper hot pressing plate 210 , which means that at least one of the two satisfies the positional relationship and can achieve the effect of separating the upper film from the upper hot pressing plate 210 .

[0086] For the apex of the front support roller 120 and / or the rear support roller 140 to be higher than the lower hot press plate 190, the apex of one of the front support roller 120 and the rear support roller 140 can be made higher than the lower hot press plate 190, and the apex of the other one of the front support roller 120 and the rear support roller 140 can be made equal to or slightly lower than the lower hot press plate 190.

[0087] In this embodiment, the apexes of the front support roller 120 and the rear support roller 140 are both higher than the lower hot pressing plate 190, which is convenient for operators to adjust and easy to use.

[0088] In some specific embodiments of the present invention, the front support roller 120 and / or the rear support roller 140 may be made to elastically support the lower film.

[0089] It is easy to understand that this embodiment enables the front support roller 120 and / or the rear support roller 140 to elastically support the lower film. On the one hand, it can meet the requirement of separating the lower film from the lower hot pressing plate 190. On the other hand, when the front pressing roller 130 and the rear pressing roller 150 are pressed down, the front support roller 120 and the rear support roller 140 can descend, so that the lower film contacts the lower hot pressing plate 190, thereby meeting the composite needs.

[0090] For the front support roller 120 and / or the rear support roller 140 to elastically support the lower film, at least one of the front support roller 120 and the rear support roller 140 may be connected with a spring telescopic seat to facilitate the lower film to descend and contact the lower hot pressing plate 190.

[0091] In this embodiment, the front support roller 120 and the rear support roller 140 both elastically support the lower film to achieve the overall descent of the lower film to fit the lower hot pressing plate 190 .

[0092] In some specific embodiments of the present invention, the lower hot pressing assembly 110 may include a lower hot pressing plate 190 , and the lower hot pressing plate 190 has an adsorption surface 200 for adsorbing the lower film and the pole piece.

[0093] It is easy to understand that, in this embodiment, by providing the lower hot pressing plate 190 with the adsorption surface 200 , it is also convenient to fix the lower film and the pole piece, thereby preventing the pole piece from moving randomly and ensuring the composite quality.

[0094] In some specific embodiments of the present invention, the electrode assembly device may include a dust removal component, which is used to remove dust between the upper hot pressing component 100 and the lower hot pressing component 110. The dust removal component includes a dust blowing component and a dust suction component, which are located on the left and right sides of the lower film conveying direction.

[0095] It is easy to understand that in this embodiment, a dust removal component is provided, so that the dust removal component includes a dust blowing part and a dust collecting part. Therefore, the dust is blown up by the dust blowing part and the dust is sucked away by the dust collecting part, thereby avoiding dust pollution at the site. At the same time, the dust far away from the dust blowing part and the dust collecting part can be taken away, reducing the difficulty of arranging the dust blowing part and the dust collecting part, and also facilitating the removal of dust located in the middle or center of the hot pressing mechanism.

[0096] The dust blowing component and the dust collecting component can be understood as components with ventilation pipe openings, which is easy to understand and is not shown in the figure in this embodiment.

[0097] In some specific embodiments of the present invention, a winding mechanism or a re-rolling mechanism may be further provided on the discharge side of the rear rolling assembly to meet the needs of battery cell production.

[0098] As for the hot pressing mechanism, the hot pressing mechanism can be set on a mold frame, and the mold frame has an upper mold plate, a lower mold plate and guide pillars, which are convenient for lifting and lowering. It is also easy to produce different battery cells by replacing the mold frame.

[0099] For the hot pressing mechanism, the electrode composite device includes an electric cylinder, etc. The electric cylinder drives the upper template to achieve lifting.

[0100] The pole piece composite device also includes Figure 1 The horizontal screw is used to adjust the position of the electric cylinder for easy use.

[0101] Reference Figure 4 The present invention also proposes a pole piece composite method, which is applied to the above-mentioned pole piece composite device.

[0102] For the pole piece composite method, the pole piece composite method includes the following steps: In step S100, the upper film and the lower film are transferred to a hot pressing station to form a first gap 160 between the upper film and the lower film.

[0103] Specifically, the bottoms of the front pressure roller 130 and the rear pressure roller 150 abut against the upper film, so that the upper film is separated from the upper hot pressing plate, and the tops of the front support roller 120 and the rear support roller 140 abut against the lower film, so that the lower film is separated from the upper hot pressing plate 210.

[0104] In this embodiment, when the front pressure roller 130 rises to the highest point, a first gap 160 can be formed between the upper film and the lower film.

[0105] In step S200 , the electrode piece transfer member 170 absorbs the electrode piece, and the electrode piece transfer member 170 moves along the conveying direction of the lower film to place the electrode piece on the lower film, and the electrode piece transfer member 170 contacts the upper film through the lifting roller 180 .

[0106] That is to say, before compounding, this embodiment places the pole piece, the upper film and the lower film in the same position, so that compounding can be completed by one hot pressing, without the need for a second hot pressing, thereby improving compounding efficiency.

[0107] In step S300 , the adsorption surface 200 of the lower hot pressing plate 190 adsorbs the lower film and the electrode piece to fix the lower film and the electrode piece.

[0108] Since the tops of the front support roller 120 and the rear support roller 140 are higher than the lower hot press plate 190 In step S400, the front pressing roller 130 descends to make the upper film flat against the electrode sheet and the lower film.

[0109] In some specific embodiments of the present invention, the rear pressure roller 150 and the front pressure roller 130 can be raised and lowered synchronously.

[0110] In this embodiment, the rear pressing roller 150 is independent, and the height position of the rear pressing roller 150 remains unchanged to prevent the composite upper film and lower film from being separated.

[0111] In step S500 , the upper hot pressing plate 210 descends, and the upper hot pressing plate 210 presses the electrode sheet, the upper film and the lower film down to the lower hot pressing plate 190 .

[0112] In this embodiment, since the elastic pressing block 220 is provided, the elastic pressing block 220 presses the pole piece.

[0113] Step S600 , after the hot pressing is continued for a set time, the battery cell is formed, the upper hot pressing plate 210 rises, and the battery cell is separated from the upper hot pressing plate 210 and the lower hot pressing plate.

[0114] In step S700 , the front pressing roller 130 , the front supporting roller 120 , the rear pressing roller 150 and the rear supporting roller 140 rotate to transfer the battery cells.

[0115] In step S800 , the front pressing roller 130 rises, and the unlaminated upper film rises to re-form the first gap 160 .

[0116] In summary, the present invention arranges the feeding part so that the pole piece is located between the upper film and the lower film, and also facilitates the completion of the composite by one-time hot pressing, thereby improving the hot pressing efficiency.

[0117] The present invention clamps the upper film and the lower film by rolling to make the upper film, the lower film and the pole piece flat, so that the upper film, the lower film and the pole piece are in a nearly flat plate state, which is convenient for completing the compounding by hot pressing of a pressing plate.

[0118] The present invention can increase the contact area, improve the hot pressing effect, prevent the battery core from being damaged, and improve the composite quality by hot pressing the upper film, the lower film and the pole piece in a flat state through a pressing plate.

[0119] The present invention clamps the upper film and the lower film by roller pressing, and also facilitates timely transfer of the battery cell after releasing the hot pressing, avoiding the upper film and the lower film from being separated again after releasing the roller pressing and clamping, thereby ensuring the composite quality.

[0120] In the description of this specification, the description with reference to the terms "one embodiment, some embodiments, illustrative embodiments, examples, specific examples or some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0121] The terms "first, second, third, fourth", etc. (if any) in the specification and claims of this application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments described herein can be implemented in an order other than that shown or described herein.

[0122] It should also be noted that in the description of this specification, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0123] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that comprises a series of parts or units is not necessarily limited to those parts or units explicitly listed, but may also include other parts or units not explicitly listed or inherent to such process, method, product, or apparatus.

[0124] Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0125] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A pole piece composite method, characterized in that: include: In the feeding part, the upper film, the lower film and the electrode piece are transferred to the hot pressing station so that the electrode piece is located between the upper film and the lower film; In the hot pressing part, the upper film and the lower film are clamped by rollers to make the upper film, the lower film and the pole piece flat, and the pressing plate hot presses the flatly-attached upper film, the lower film and the pole piece to form a battery cell; In the unloading part, the hot pressing is released, then the battery cells are transferred, and then the roller clamping is released.

2. The pole piece composite method according to claim 1, characterized in that: The method of locating the pole piece between the upper film and the lower film includes: forming a first gap between the upper film and the lower film, transferring the pole piece to the first gap, and placing the pole piece on the lower film.

3. The pole piece composite method according to claim 2, characterized in that: The first gap is formed between the upper film and the lower film, comprising: the front pressure roller rises, so that the upper film rises and moves away from the lower film, so as to form the first gap; The roller clamps the upper film and the lower film to make the upper film, the lower film and the pole piece flat, including: the front pressure roller descends, the front pressure roller presses the upper film, so that the upper film descends and approaches the lower film, so that the upper film, the lower film and the pole piece are flat.

4. The pole piece composite method according to claim 2, characterized in that: The step of transferring the electrode piece to the first gap includes: transferring the electrode piece to the first gap along the lower film conveying direction.

5. The pole piece composite method according to claim 2, characterized in that: The method of transferring the pole piece to the first gap includes: a pole piece transfer member transfers the pole piece to the first gap, and the pole piece transfer member contacts the upper film through a lifting roller.

6. The pole piece composite method according to claim 2, characterized in that: After the pole piece is placed on the lower film, the lower hot pressing plate absorbs the lower film and the pole piece.

7. The pole piece composite method according to claim 1, characterized in that: The pressing plate hot presses the upper film, the lower film and the pole piece in a flat state, including: the upper hot pressing plate presses the upper film, the lower film and the pole piece in a flat state to the lower hot pressing plate for hot pressing.

8. The pole piece composite method according to claim 7, characterized in that: The upper hot pressing plate and / or the lower hot pressing plate has an elastic pressing block facing the electrode sheet.

9. The pole piece composite method according to claim 1, characterized in that: The releasing of rolling clamping comprises: the front pressing roller rises, and the rear pressing roller and the rear supporting roller continue to roll and clamp the battery core.

10. A pole piece composite device, characterized in that: A pole piece composite method according to any one of claims 1 to 9 is used.

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