CN215176516U

CN215176516U - Battery pole piece drying device

Info

Publication number: CN215176516U
Application number: CN202121010243.5U
Authority: CN
Inventors: 李雪江; 张竣博
Original assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Current assignee: Evergrande New Energy Technology Shenzhen Co Ltd
Priority date: 2021-05-12
Filing date: 2021-05-12
Publication date: 2021-12-14
Anticipated expiration: 2031-05-12

Abstract

The utility model relates to a power battery makes technical field, discloses a battery pole piece drying device. The battery pole piece drying device comprises a box body, a pressing plate and a vacuum assembly. A working cavity is arranged in the box body, and a placing plate used for bearing the pole piece is arranged in the working cavity. The clamp plate parallel is arranged in and is placed the board top, and the clamp plate can press the upper surface of establishing the pole piece in order to compress tightly the pole piece at the clamp plate and place between the board, is provided with first heating member on the clamp plate, and first heating member can heat the pole piece. The vacuum assembly is communicated with the working cavity and is used for vacuumizing the working cavity. The utility model discloses when the pole piece is dry, the pole piece is compressed tightly, has avoided the pole piece to warp, has guaranteed the qualification rate of pole piece, and the mode through the direct contact pole piece is to the pole piece heating, has improved the programming rate of pole piece, has accelerated drying efficiency again, has saved the resource, has reduced process cost.

Description

Battery pole piece drying device

Technical Field

The utility model relates to a power battery makes technical field, especially relates to a battery pole piece drying device.

Background

Lithium batteries have been widely used in various fields in recent years due to their advantages of long cycle life, high energy density, no memory effect, quick charging, environmental friendliness, etc. The lithium battery comprises a shell and a core package inside the shell. The method comprises the steps of obtaining pole pieces through die cutting, drying the pole pieces by using a drying device to remove water, and placing a diaphragm between two adjacent pole pieces to form a core package. The battery pole piece drying device who uses among the prior art dries the pole piece, place the pole piece of treating drying usually in drying device's box inside, then blow into the higher gas of being heated of temperature to the incasement and make the pole piece heat up, reach and predetermine the temperature after, with the inside evacuation of box, utilize pressure differential to make the inside moisture of pole piece and pole piece separation, the atmospheric pressure of incasement is lower moreover, make the boiling point reduction of water, thereby make the inside moisture low temperature boiling evaporation of box, realize the purpose of removing the moisture in the pole piece. The heated gas is used for heating the pole piece, so that the temperature inside the box body is relatively even, but the temperature rising speed in the drying process is relatively slow, the drying efficiency is low, the energy consumption is relatively high, the production period of the product is prolonged, and the process cost is increased. The powder on the pole piece is blown up by the blown-in gas and falls around the pole piece and the drying device, so that the qualification rate of the pole piece is reduced, and the cleaning and maintenance time cost and the labor cost in the box body of the drying device are increased. When the moisture is more, the pole piece formed by die cutting also has the problem of bending and tilting, and the qualification rate of the core package is influenced.

Therefore, a battery pole piece drying device is needed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery pole piece drying device, when the pole piece is dry, the pole piece is compressed tightly, has flattened the pole piece, has guaranteed the qualification rate of pole piece with the core package, and the mode through the direct contact pole piece is to the pole piece heating, has improved the programming rate of pole piece, has accelerated drying efficiency again, has saved the resource, has reduced process cost.

To achieve the purpose, the utility model adopts the following technical proposal:

a battery pole piece drying device comprising:

the pole piece storage box comprises a box body, wherein a working cavity is arranged in the box body, and a placing plate for bearing a pole piece is arranged in the working cavity;

the pressing plate is arranged above the placing plate in parallel, the pressing plate can be pressed on the upper surface of the pole piece to tightly press the pole piece between the pressing plate and the placing plate, and a first heating element is arranged on the pressing plate and can heat the pole piece;

and the vacuum assembly is communicated with the working cavity and is used for vacuumizing the working cavity.

As a preferred technical scheme of battery pole piece drying device, place and be provided with the second heating member on the board, the second heating member can heat the pole piece.

As a preferred technical scheme of the battery pole piece drying device, a placing groove is formed in the top surface of the placing plate, the placing groove is used for placing the pole piece, and the second heating element is arranged in the placing plate and below the placing groove.

As an optimal technical scheme of the battery pole piece drying device, a pole piece cartridge clip is arranged on the placing plate and comprises a bottom plate and a plurality of limiting parts, the bottom plate is arranged in the placing groove, each limiting part is vertically connected to the top surface of the bottom plate, and the limiting parts surround a placing space for placing the pole piece.

As a preferred technical scheme of the battery pole piece drying device, the battery pole piece drying device further comprises a lifting assembly, and the lifting assembly is used for driving the pressing plate to lift so as to enable the pressing plate to be far away from or tightly press the pole piece.

As an optimal technical scheme of the battery pole piece drying device, the top surface of the pressing plate is connected with a connecting frame, the connecting frame comprises a connecting plate and a connecting piece, the connecting plate and the pressing plate are arranged at intervals, the connecting piece is connected between the connecting plate and the pressing plate, and the connecting plate is connected with the lifting assembly.

As an optimal technical scheme of the battery pole piece drying device, the lifting assembly comprises a guide rod and a lead screw, the guide rod and the axis of the lead screw are vertically arranged, the lead screw penetrates through the connecting plate in a threaded mode, and the guide rod is movably arranged in the connecting plate in a penetrating mode.

As an optimal technical scheme of the battery pole piece drying device, the lifting assembly further comprises a driving motor, and the driving motor is used for driving the screw rod to rotate around the axis of the screw rod.

As a preferred technical scheme of the battery pole piece drying device, the box body is provided with an air exhaust hole, and the vacuum assembly is communicated with the working cavity through the air exhaust hole.

As an optimal technical scheme of the battery pole piece drying device, the battery pole piece drying device further comprises an inflation assembly, an inflation hole communicated with the working cavity is formed in the box body, and the inflation assembly is communicated with the working cavity through the inflation hole and used for inflating the working cavity.

The utility model has the advantages that: the utility model discloses place the board at the inside board that is provided with of box, the top parallel arrangement who places the board has the clamp plate, the pole piece is placed in when dry and is placed between board and the clamp plate, and be provided with first heating member on the clamp plate, first heating member can heat the pole piece, the pole piece is in clamp plate and pole piece laminating when the heating drying, the clamp plate plays the effect of heating the pole piece, play the effect of flattening the pole piece again, the powder that has also avoided gaseous messenger's pole piece drops, the qualification rate of pole piece has been guaranteed, and the mode through the direct contact pole piece has been realized to the pole piece heating during the pole piece of clamp plate laminating, the programming rate of temperature of pole piece has been improved, drying efficiency has been accelerated again, resources are saved, the process cost is reduced.

Drawings

Fig. 1 is a schematic structural diagram of a battery pole piece drying device provided by an embodiment of the present invention;

fig. 2 is a cross-sectional view of the battery pole piece drying device provided by the embodiment of the utility model.

In the figure:

10. pole pieces;

1. a box body; 11. a working cavity; 12. an air exhaust hole; 13. an inflation hole; 14. an electric cabinet; 15. ground feet;

2. placing the plate; 21. a placement groove; 3. pressing a plate; 4. a first heating member;

5. a lifting assembly; 51. a guide bar; 52. a screw rod; 53. a drive motor;

6. a second heating member;

7. pole piece cartridge clips; 71. a base plate; 72. a limiting member; 73. connecting the cross bars;

8. a connecting frame; 81. a connecting plate; 82. a connecting member; 821. a first through hole;

9. a fixing plate; 91. a second via.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The embodiment provides a battery pole piece drying device. Specifically, as shown in fig. 1-2, the battery pole piece drying device comprises a box body 1, a pressing plate 3 and a vacuum assembly. A working cavity 11 is arranged in the box body 1, and a placing plate 2 used for bearing the pole piece 10 is arranged in the working cavity 11. The clamp plate 3 is arranged in parallel above the placing plate 2, the clamp plate 3 can be pressed on the upper surface of the pole piece 10 so as to compress the pole piece 10 between the clamp plate 3 and the placing plate 2, the clamp plate 3 is provided with a first heating element 4, and the first heating element 4 can heat the pole piece 10. The vacuum assembly is communicated with the working cavity 11 and is used for vacuumizing the working cavity 11. This embodiment is provided with in box 1 inside and places board 2, the top parallel arrangement who places board 2 has clamp plate 3, pole piece 10 is placed in when dry and is placed between board 2 and the clamp plate 3, and be provided with first heating member 4 on the clamp plate 3, pole piece 10 is laminated with pole piece 10 when the heating dry clamp plate 3, clamp plate 3 plays the effect of heating pole piece 10, play the effect of flattening pole piece 10 again, the powder of also having avoided gaseous messenger pole piece 10 drops, the qualification rate of pole piece 10 has been guaranteed, and realized heating pole piece 10 through the mode of direct contact pole piece 10 when clamp plate 3 laminates pole piece 10, the programming rate of temperature of pole piece 10 has been improved, drying efficiency has been accelerated again, resources are saved, the process cost is reduced. In the present embodiment, the placing plate 2 and the pressing plate 3 are both horizontally placed. When dried, the pole piece 10 is placed horizontally, and a plurality of pole pieces 10 may be stacked on the placing plate 2. The pressing plate 3 is a cuboid, and the size of the bottom surface is not larger than that of the top surface of the pole piece 10.

In this embodiment, as shown in fig. 2, the first heating member 4 is a heating pipe, the heating pipe is located inside the pressing plate 3, and when the pressing plate 3 presses the pole piece 10, the structure can prevent the first heating member 4 from being extruded, so that the service life of the first heating member 4 is prolonged, and the cost is reduced. Specifically, the heating pipe is cylindricly, and its axis extends along the horizontal direction, and first heating pipe groove has been seted up to the level on the lateral wall of clamp plate 3, and first heating member 4 is arranged in first heating pipe inslot, and first heating member 4 can directly place in first heating pipe inslot portion, or through the glue film bonding fixed, does not do the restriction here. The platen 3 is made of metal, preferably stainless steel. In the present embodiment, two first heating members 4 are arranged in parallel, and both the first heating members 4 are arranged along the length direction of the platen 3.

It should be noted that, in order to clearly show the structure inside the working chamber 11, the door of the battery pole piece drying device is hidden in fig. 1 and fig. 2. And the box door is arranged to facilitate the placement of the pole piece 10 inside the working chamber 11.

In this embodiment, the vacuum assembly is a vacuum pump, which can suck out the gas in the working chamber 11, so that the working chamber 11 forms a vacuum environment. Specifically, the box body 1 is provided with an air exhaust hole 12, and the vacuum assembly is communicated with the working cavity 11 through the air exhaust hole 12. Further, the air exhaust end of the vacuum pump is connected with one end of a pipeline, and the other end of the pipeline is communicated with the air exhaust hole 12. The pipeline is connected with the air pumping hole 12 through screw threads or is directly bonded through a glue layer. In order to ensure the tightness of the working chamber 11, a sealing element is arranged between the suction hole 12 and the pipeline, and the sealing element can be a sealing ring.

Further, as shown in fig. 1-2, the battery pole piece drying device further includes an air charging assembly for charging nitrogen into the working cavity 11. Specifically, the inflation assembly is a nitrogen storage tank, nitrogen can be filled into the working cavity 11, the nitrogen is inactive in chemical property, and the reaction with the foil on the pole piece 10 is avoided. Specifically, the box body 1 is provided with an inflation hole 13 communicated with the working cavity 11, and the inflation assembly is communicated with the working cavity 11 through the inflation hole 13. Further, the end of giving vent to anger of nitrogen gas holding vessel is connected with the one end of pipeline, and the other end and the gas charging hole 13 of pipeline communicate. The pipeline is connected with the air charging hole 13 through screw threads or is directly bonded through a glue layer. In order to ensure the tightness of the working chamber 11, a sealing element, which may be a sealing ring, is disposed between the inflation hole 13 and the pipeline. In this embodiment, the pumping hole 12 and the gas filling hole 13 are both formed on the same side wall of the working chamber 11.

Preferably, the bottom surface of the pressing plate 3 is covered with a silicone layer, that is, the bottom surface of the pressing plate 3 contacting the pole piece 10 is provided with a silicone layer. The silica gel layer material is softer, can protect pole piece 10, prevents that clamp plate 3 from direct and pole piece 10 contact, avoids remaining on pole piece 10 because of the metal particle that clamp plate 3 and pole piece 10 friction produced, has guaranteed the qualification rate of pole piece 10. Further, the pressing plate 3 is made of metal, and the silica gel layer can be adhered and fixed on the bottom surface of the pressing plate 3 through the glue layer.

Preferably, the resting plate 2 is provided with second heating members 6, the second heating members 6 being able to heat the pole pieces 10. The second heating member 6 is the heating pipe, and the heating pipe is located the inside of placing board 2, and when clamp plate 3 compressed tightly pole piece 10, this structure can avoid the second heating member 6 to be extruded, has improved the life of second heating member 6, the cost is reduced. Specifically, the heating pipe is cylindricly, and its axis extends along the horizontal direction, places the second heating groove of having seted up to the lateral wall of board 2 upper level, and second heating member 6 is arranged in the second heating inslot, and second heating member 6 can directly place in second heating pipe inslot portion, or through the glue film bonding fixed, does not do the restriction here. The placing plate 2 is made of metal, preferably steel, and is rectangular. In the present embodiment, the second heating members 6 are provided in parallel in four, and the four second heating members 6 are each provided in the width direction of the placement plate 2.

Further, a placing groove 21 is formed in the top surface of the placing plate 2, the placing groove 21 is used for placing the pole piece 10, the second heating element 6 is placed in the placing plate 2 and located below the placing groove 21, the placing groove 21 is arranged to facilitate positioning of the placing position of the pole piece 10, and practicability and use convenience are improved. Because the pole piece 10 is arranged on the placing groove 21, the second heating member 6 is arranged below the placing groove 21, the second heating member 6 can heat the pole piece 10 in a targeted manner, the temperature rise speed of the pole piece 10 is ensured, and the drying efficiency is further ensured. The placing groove 21 is square, and one side of the placing groove 21 is communicated with the side wall of the placing plate 2 facing the box door.

Preferably, place and be provided with pole piece clip 7 on the board 2, pole piece clip 7 includes bottom plate 71 and a plurality of locating part 72, and in standing groove 21 was arranged in to bottom plate 71, every locating part 72 all connected perpendicularly in the top surface of bottom plate 71, and a plurality of locating parts 72 enclosed and become the space of placing that is used for placing pole piece 10, set up pole piece clip 7, are convenient for stack a plurality of pole pieces 10 and dry simultaneously, have improved the practicality. It will be appreciated that the platen 3 enters the placement space from above and compresses the pole pieces 10.

In this embodiment, the bottom plate 71 is rectangular, two oppositely disposed side walls of the bottom plate 71 can be attached to two oppositely disposed groove walls of the placing groove 21, two short sides of the bottom plate 71 are attached to two opposite groove walls of the placing groove 21, and one long side of the bottom plate 71 is attached to a groove wall of the placing groove 21 away from the box door, so that the pole piece cartridge clip 7 is directly embedded in the placing groove 21, and the pole piece cartridge clip 7 is positioned. In other embodiments, the bottom plate 71 may be detachably connected to the placement groove 21 by bolts and nuts, which are not limited herein.

In the present embodiment, the limiting members 72 are angle steels, and four limiting members 72 are provided. The four limit pieces 72 are respectively arranged at four corners of the bottom plate 71, and enclose a placing space for placing the pole piece 10. When the pole piece 10 is arranged in the placing space, the four corners of the pole piece 10 are respectively arranged corresponding to the corners of the inner sides of the four angle steels, and gaps are reserved, so that the angle steels are prevented from damaging the pole piece 10. The bottom plate 71 is also made of metal, so that the heat of the second heating element 6 can be quickly transferred to the pole piece 10. The limiting member 72 can be detachably connected to the bottom plate 71 by bolts and nuts or directly connected with the bottom plate 71 by welding.

Further, as shown in fig. 1-2, a connecting cross bar 73 is connected between two adjacent limiting members 72, so that the structural strength of the pole piece clip 7 is improved. In this embodiment, the connecting cross bar 73 is horizontally disposed and detachably connected to the limiting member 72 by a bolt. Specifically, connecting holes are formed in both ends of the connecting cross bar 73, and bolts pass through the connecting holes and the limiting members 72 to be screwed with nuts. The connecting hole is waist-shaped, when in actual installation, an error exists between the actual installation position and the theoretical installation position of the limiting piece 72, and the waist-shaped connecting hole can enlarge the allowable error of the installation position of the limiting piece 72. The four connecting cross bars 73 are enclosed into a rectangular limiting frame, wherein two connecting cross bars 73 corresponding to two long sides of the rectangle are set as a first connecting cross bar group, two connecting cross bars 73 corresponding to two short sides of the rectangle are set as a second connecting cross bar group, and the connecting cross bars 73 in the first connecting cross bar group are arranged below the connecting cross bars 73 in the second connecting cross bar group.

Preferably, the battery pole piece drying device further comprises a lifting assembly 5. The lifting assembly 5 is used for driving the pressure plate 3 to lift so as to enable the pressure plate 3 to be far away from or pressed against the pole piece 10. Through setting up lifting unit 5, can make clamp plate 3 rise or descend to make clamp plate 3 keep away from or compress tightly pole piece 10, adjust clamp plate 3 to the packing force of pole piece 10, improved the practicality. But also can be suitable for compressing different numbers of pole pieces 10, thereby enlarging the application range.

Preferably, clamp plate 3 top surface is connected with link 8, link 8 includes connecting plate 81 and connecting piece 82, connecting plate 81 and 3 intervals of clamp plate set up, connecting piece 82 is connected between connecting plate 81 and clamp plate 3, connecting plate 81 is connected with lifting unit 5, set up link 8, be convenient for be connected with lifting unit 5, and be connected through connecting plate 81 and connecting piece 82 between lifting unit 5 and the clamp plate 3, the heat of first heating member 4 transmission to lifting unit 5 has been reduced, the influence of higher temperature to lifting unit 5 has been avoided.

Further, as shown in fig. 1-2, the connecting member 82 is plate-shaped, and the connecting member 82 is provided with a first through hole 821, which is provided to facilitate air circulation inside the working chamber 11, and also to reduce weight and burden of the lifting assembly 5. In this embodiment, the connecting frame 8 is in a ladder shape, and the connecting members 82 are obliquely connected between the two ends of the connecting plate 81 and the top surface of the pressing plate 3, so that the structural stability of the connecting frame 8 is improved.

Preferably, the lifting assembly 5 comprises a guide rod 51 and a screw rod 52, the axes of the guide rod 51 and the screw rod 52 are both vertically arranged, the screw rod 52 penetrates through the connecting plate 81 in a threaded manner, and the guide rod 51 is movably arranged in the connecting plate 81 in a penetrating manner. The space between the connecting plate 81 and the pressing plate 3 facilitates the movement of the screw 52.

Further, the lifting assembly 5 further comprises a driving motor 53, the driving motor 53 being configured to drive the screw 52 to rotate around the axis of the screw 52 itself. Specifically, the driving motor 53 is disposed in the working chamber 11 and above the lead screw 52, and the top end of the lead screw 52 is coaxially connected with the output rotating shaft of the driving motor 53. The driving motor 53 is arranged to drive the screw rod 52 to rotate, so that the automation degree of the battery pole piece drying device is improved. Specifically, the output rotating shaft of the driving motor 53 and the lead screw 52 may be connected by a coupling or by direct welding, which is not limited herein.

In this embodiment, a fixing plate 9 is horizontally disposed in the working cavity 11 of the box body 1, and two ends of the fixing plate 9 are respectively fixedly connected with an inner wall of the working cavity 11, specifically, may be fixed by a bolt or an adhesive layer, and is not limited herein. The fixing plate 9 is arranged above the pressing plate 3, the screw rod 52 is arranged below the fixing plate 9, the driving motor 53 is fixed on the top surface of the fixing plate 9, and the output rotating shaft of the driving motor 53 vertically penetrates through the fixing plate 9 and is connected with the top end of the screw rod 52. In this embodiment, the fixing plate 9 is provided with a second through hole 91, which is further beneficial to the gas circulation inside the working cavity 11 and also plays a role in reducing weight. Two second through holes 91 are symmetrically formed in the two ends of the fixing plate 9 in the length direction, and the two second through holes 91 are respectively communicated with the end faces of the two ends of the fixing plate 9.

Further, as shown in fig. 1-2, the box body 1 is further provided with an electric cabinet 14, and the electric cabinet 14 and the working cavity 11 are arranged at intervals, so that the electric cabinet 14 is prevented from being in a vacuum state, and manual maintenance is facilitated. In this embodiment, the electric cabinet 14 is disposed below the working chamber 11. A controller is arranged in the electric cabinet 14, the controller is electrically connected with the driving motor 53 and the vacuum pump, a one-way valve is arranged at the gas outlet end of the nitrogen storage tank and electrically connected with the controller, and the controller has three functions, wherein the first function is to enable the output rotating shaft of the driving motor 53 to rotate; the second function is to start the vacuum pump and vacuumize the working cavity 11 through the pipeline and the air exhaust hole 12; the third function is to open the check valve and realize that the nitrogen storage tank fills nitrogen into the working cavity 11 through the pipeline and the charging hole 13. The control principle and structure of the controller are the prior art, and are not described herein again. In fig. 2, the internal structure of the electric cabinet 14 is not shown.

Preferably, as shown in fig. 1-2, the bottom of the box body 1 is provided with a plurality of feet 15, the feet 15 are provided with a plurality of feet, the box body 1 is placed on the ground through the feet 15, the box body 1 is prevented from toppling over when the bottom surface of the box body 1 is raised due to processing errors, the box body 1 can be placed stably, the pole piece 10 which is caused by toppling over of the box body in the baking process is prevented from being scrapped, and the qualified rate of the pole piece 10 is ensured. In this embodiment, box 1 is the cuboid, and lower margin 15 is provided with four, and four corners on the 1 bottom surface of box are arranged respectively in four lower margins 15, have further guaranteed box 1's steady. In some embodiments, feet 15 can be welded directly to the bottom surface of tank 1. In other embodiments, a threaded hole is vertically formed in each of four corners of the bottom surface of the box body 1, each ground foot 15 comprises a vertically arranged screw and a disc coaxially arranged with the screw, and the screw is connected to the top surface of the disc and is in threaded connection with the threaded hole, so that the height of each ground foot 15 can be adjusted conveniently, and the ground feet 15 can adapt to uneven ground. And the contact area of the ground feet 15 and the ground is increased by arranging the circular discs.

Preferably, the battery pole piece drying device is internally provided with a temperature acquisition part, which is specifically arranged inside the pressing plate 3 and inside the placing plate 2, and is used for acquiring the temperature of the pressing plate 3 and the placing plate 2 and avoiding the damage of the pole piece 10 caused by overhigh temperature. In this embodiment, the temperature collecting element may be a thermocouple temperature sensing probe.

For convenience of understanding, the use method of the battery pole piece drying device provided by the embodiment is as follows: first, the pole piece 10 is placed in the pole piece cartridge 7 and in the working chamber 11. Next, the pressing plate 3 is pressed against the pole piece 10. Again, the working chamber 11 is evacuated by a vacuum pump. Then, until the pole piece 10 reaches the preset temperature, nitrogen is filled into the working cavity 11 through the air filling hole 13. And finally, opening the box door to finish drying the pole piece 10.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A battery pole piece drying device is characterized by comprising:

the pole piece mounting device comprises a box body (1), wherein a working cavity (11) is arranged in the box body (1), and a placing plate (2) used for bearing a pole piece (10) is arranged in the working cavity (11);

the pressing plate (3) is arranged above the placing plate (2) in parallel, the pressing plate (3) can be pressed on the upper surface of the pole piece (10) to tightly press the pole piece (10) between the pressing plate (3) and the placing plate (2), a first heating element (4) is arranged on the pressing plate (3), and the first heating element (4) can heat the pole piece (10);

and the vacuum assembly is communicated with the working cavity (11) and is used for vacuumizing the working cavity (11).

2. The battery pole piece drying device according to claim 1, characterized in that a second heating element (6) is arranged on the placing plate (2), the second heating element (6) being capable of heating the pole piece (10).

3. The battery pole piece drying device according to claim 2, wherein a placing groove (21) is formed in the top surface of the placing plate (2), the placing groove (21) is used for placing the pole piece (10), and the second heating member (6) is placed inside the placing plate (2) and below the placing groove (21).

4. The battery pole piece drying device according to claim 3, wherein a pole piece clip (7) is disposed on the placing plate (2), the pole piece clip (7) comprises a bottom plate (71) and a plurality of limiting members (72), the bottom plate (71) is placed in the placing groove (21), each limiting member (72) is vertically connected to the top surface of the bottom plate (71), and the plurality of limiting members (72) enclose a placing space for placing the pole piece (10).

5. The battery pole piece drying device according to claim 1, further comprising a lifting assembly (5), wherein the lifting assembly (5) is used for driving the pressing plate (3) to lift so as to enable the pressing plate (3) to be far away from or press the pole piece (10).

6. The battery pole piece drying device according to claim 5, wherein a connecting frame (8) is connected to the top surface of the pressing plate (3), the connecting frame (8) comprises a connecting plate (81) and a connecting piece (82), the connecting plate (81) and the pressing plate (3) are arranged at intervals, the connecting piece (82) is connected between the connecting plate (81) and the pressing plate (3), and the connecting plate (81) is connected with the lifting assembly (5).

7. The battery pole piece drying device according to claim 6, wherein the lifting assembly (5) comprises a guide rod (51) and a screw rod (52), the axes of the guide rod (51) and the screw rod (52) are both vertically arranged, the screw rod (52) is in threaded connection with the connecting plate (81) in a penetrating manner, and the guide rod (51) is movably arranged in the connecting plate (81) in a penetrating manner.

8. The battery pole piece drying device according to claim 7, characterized in that the lifting assembly (5) further comprises a driving motor (53), the driving motor (53) being used for driving the screw (52) to rotate around the axis of the screw (52) itself.

9. The battery pole piece drying device according to any one of claims 1 to 8, wherein a suction hole (12) is formed in the box body (1), and the vacuum assembly is communicated with the working cavity (11) through the suction hole (12).

10. The battery pole piece drying device according to any one of claims 1 to 8, further comprising an inflation assembly, wherein the box body (1) is provided with an inflation hole (13) communicated with the working cavity (11), and the inflation assembly is communicated with the working cavity (11) through the inflation hole (13) and is used for inflating the working cavity (11).