CN113020399A - Pole piece die cutting system and method - Google Patents
Pole piece die cutting system and method Download PDFInfo
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- CN113020399A CN113020399A CN202110336128.5A CN202110336128A CN113020399A CN 113020399 A CN113020399 A CN 113020399A CN 202110336128 A CN202110336128 A CN 202110336128A CN 113020399 A CN113020399 A CN 113020399A
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- 238000005520 cutting process Methods 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 18
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- 238000001816 cooling Methods 0.000 claims description 30
- 239000000110 cooling liquid Substances 0.000 claims description 11
- 230000004308 accommodation Effects 0.000 claims description 10
- 238000002242 deionisation method Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
- B21D28/14—Dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
- B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
- B21D43/08—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers
- B21D43/09—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by rollers by one or more pairs of rollers for feeding sheet or strip material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D55/00—Safety devices protecting the machine or the operator, specially adapted for apparatus or machines dealt with in this subclass
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
- H05F3/00—Carrying-off electrostatic charges
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
The invention provides a pole piece die cutting system and a pole piece die cutting method, wherein the pole piece die cutting system comprises a rack and a die cutting bin arranged on the rack, the die cutting bin is provided with an accommodating space, and two sides of the die cutting bin are respectively provided with a pole piece inlet and a pole piece outlet; a gas supply device positioned relative to the frame for supplying an inert gas into the accommodating space; and a die cutting assembly is further arranged in the accommodating space and comprises an upper die and a lower die, and the upper die and the lower die can move relatively to die cut the electrode plate under the protection of inert gas. According to the pole piece die cutting system, the die cutting bin is arranged, the inert gas is introduced into the accommodating space of the die cutting bin, and the die cutting assembly is arranged in the accommodating space, so that the pole piece can be cut under the protection of the inert gas, and in the die cutting process, the fire accident caused by the temperature rise of a die cutting tool can be effectively prevented, so that the danger coefficient of equipment operation can be reduced, the safety performance of equipment is improved, and the die cutting speed can be improved.
Description
Technical Field
The invention relates to the technical field of lithium battery production equipment, in particular to a pole piece die cutting system. Meanwhile, the invention also relates to a pole piece die cutting method using the pole piece die cutting system.
Background
With the rise of new energy industry, lithium batteries have already formed a certain production scale at home and abroad as the fastest-developing product in the new energy industry. Lithium pre-treatment is a new technology for recent lithium battery production, and in popular terms, lithium pre-treatment is to press a lithium metal belt on two surfaces of a pole piece in a rolling mode. The pre-lithium technology has the advantages of supplementing the positive lithium ions lost in the process of forming the SEI film by the first charge and discharge of the lithium battery and having great benefits on the recovery and the improvement of the battery capacity.
As is known to all, the chemical properties of lithium metal are very active, and the lithium metal can be burnt when meeting water and at a slightly high temperature, which is also a difficult point in the preparation process of a pre-lithium pole piece, and especially the pole piece after pre-lithium is difficult and dangerous to process and produce due to the fact that the front side and the back side of the pole piece are provided with lithium metal belts.
In the current market, laser die cutting or hardware die cutting is generally adopted for die cutting. The laser die cutting is to cut the pole piece by melting the pole piece at high temperature by laser, and the mode can not be used for die cutting of the pole piece after lithium pre-processing. The cutter of five metals cross cutting generally adopts metal material, and along with the increase of the number of times of cross cutting, upper slitter and lower sword can the frictional heating, and the cross cutting process also produces static easily, also can pile up some processing pieces on the blade edge simultaneously, under this condition, very easily takes place the incident of catching a fire, and the danger degree is higher.
The pre-lithium pole piece is die-cut, and the danger is generally reduced by the following modes: the die cutting speed is reduced, however, the reduction of the die cutting speed can slow down the heat generation of the die cutting, but also can lead to the reduction of the productivity.
Disclosure of Invention
In view of this, the present invention provides a die cutting system for pole pieces, which can increase the die cutting speed on the basis of improving the safety performance.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a pole piece die cutting system comprising:
the pole piece conveying device comprises a rack, wherein a die cutting bin with an accommodating space is arranged on the rack, and a pole piece inlet capable of conveying a pole piece into the accommodating space and a pole piece outlet capable of outputting the pole piece from the accommodating space are respectively formed in two sides of the die cutting bin;
a gas supply device positioned relative to the frame and configured to supply an inert gas into the accommodating space;
the die cutting device comprises a die cutting assembly arranged in the accommodating space, wherein the die cutting assembly comprises an upper die and a lower die, and is driven by an external driving part in a bearing mode, the upper die and the lower die can move relatively to carry out die cutting on the pole piece under the protection of inert gas.
Further, go up the mould and include the mould body, and set firmly in go up the last sword on the mould body, the lower mould includes the lower mould body, and set firmly in lower sword on the lower mould body, just go up the sword with the lower sword all adopts ceramic material to make.
Furthermore, an upper die cooling channel through which external cooling liquid can flow is arranged in the upper die body, and/or a lower die cooling channel through which external cooling liquid can flow is arranged in the lower die body.
Further, it has last mould binding face to go up the mould body, just the lower mould body have can because of the drive of external drive portion and with the lower mould binding face of going up the mould binding face laminating, in be equipped with on the mould body with the intercommunication go up the mould binding face with accommodation space's last mould exhaust hole, and/or be equipped with on the lower mould body with the intercommunication lower mould binding face with accommodation space's lower mould exhaust hole.
Furthermore, a deionization fan is arranged on the rack, and the deionization fan is configured to blow ion wind to the pole piece before being conveyed into the accommodating space.
Furthermore, a plurality of bearing rollers for bearing the pole pieces which enter and exit the accommodating space are arranged on the frame, and cooling liquid circulation channels which are arranged in the bearing rollers in a penetrating way along the length direction of the bearing rollers are respectively arranged in the bearing rollers.
Furthermore, the surface of each bearing roller is respectively coated with an insulating protective layer.
Furthermore, a pressure regulating valve is arranged on a communication pipeline between the gas supply device and the accommodating space.
Furthermore, a pressure difference detection unit for detecting the pressure difference between the accommodating space and the external atmospheric pressure is arranged on the die cutting bin.
Compared with the prior art, the invention has the following advantages:
according to the pole piece die cutting system, the die cutting bin is arranged, the inert gas is introduced into the accommodating space of the die cutting bin, and the die cutting assembly is arranged in the accommodating space, so that the pole piece can be cut under the protection of the inert gas, and in the die cutting process, the fire accident caused by the temperature rise of a die cutting tool can be effectively prevented, so that the danger coefficient of equipment operation can be reduced, the safety performance of equipment is improved, and the die cutting speed can be improved.
In addition, through advancing to carrying pole piece before the accommodation space is blown the ion wind and is handled to get rid of static, and lead to the coolant liquid in the bearing roller to the bearing pole piece, through cooling to the bearing roller and cooling to the pole piece, and still lead to the coolant liquid in last mould body and the lower mould body, prevent through cooling die assembly that the cross cutting in-process temperature risees, can be better prevent that cross cutting in-process temperature risees and produce static, thereby can effectively prevent to take place the accident of catching a fire, and then can improve cross cutting speed and productivity.
The invention also provides a die cutting method for the pole piece, which comprises the steps of blowing ion wind to the pole piece, and conveying the pole piece into an accommodating space with inert gas for die cutting.
Compared with the prior art, the pole piece die cutting method has the same beneficial effects as the pole piece die cutting system, and the details are not repeated.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a pole piece die cutting system according to an embodiment of the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a schematic structural diagram of a die cutting assembly according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an upper mold according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a lower die according to an embodiment of the present invention.
Description of reference numerals:
1. pole pieces; 2. a die cutting bin; 3. a die cutting assembly; 4. a carrying roller; 5. a deionizing fan; 6. mounting a plate;
201. an accommodating space; 202. a pole piece inlet; 203. a pole piece outlet;
301. an upper die body; 302. a lower die body; 303. feeding a cutter; 304. cutting;
3011. an upper die inlet; 3012. an upper die outlet; 3013. an upper die binding surface; 3014. an upper die exhaust hole; 3015. a guide post sleeve; 3016. a positioning column;
3021. a lower die inlet; 3022. an outlet of the lower die; 3023. the binding surface of the lower die; 3024. a lower die exhaust hole; 3025. a guide post; 3026. positioning holes;
401. a coolant flow channel; 402. and an insulating protective layer.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.
In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
The embodiment relates to a pole piece die cutting system, which is mainly used for effectively and safely preventing the burning problem of a pole piece subjected to pre-lithium in the die cutting process. In the overall structure, the pole piece die cutting system mainly comprises a rack, a die cutting bin arranged on the rack, a gas supply device positioned relative to the rack, and a die cutting device. Wherein. The gas supply device is used for supplying inert gas into the accommodating space of the die cutting bin, and the die cutting assembly is arranged in the accommodating space so as to cut the pole piece under the protection of the inert gas.
Based on the above overall structure description, an exemplary structure of the pole piece die-cutting system of the present embodiment is shown in fig. 1 and fig. 2, and mainly includes a machine frame not shown in the figure, a carrier roller 4 and a die-cutting bin 2, which are arranged on the machine frame. Pole piece 1 is pole piece 1 after the lithium in advance, and it is carried earlier to the accommodation space 201 of cross cutting storehouse 2 in under the bearing of bearing roller 4, after the die-cut in accommodation space 201, is exported in the accommodation space 201 afterwards.
In order to better understand the embodiment, the structure of the rack is briefly described below, and the rack is an installation carrier for the other parts, and can be formed by processing the existing section steel and sheet material, so that the other parts can be conveniently installed.
The die cutting bin 2 is fixedly arranged on the rack, the bottom wall of the die cutting bin is made of a mounting plate 6 fixedly arranged on the rack, the side wall and the top wall of the die cutting bin are made of acrylic plates, and the accommodating space 201 convenient for die cutting of the pole piece 1 is formed by the surrounding of the top wall, the bottom wall and the side wall. It should be noted that the side walls and the top wall of the accommodating cavity are preferably made of non-metal transparent material, and besides the acrylic plate material mentioned above, other materials may be adopted, such as ordinary transparent glass or transparent plastic, so as to facilitate observation of the condition in the accommodating space 201.
In order to facilitate the entrance and exit of the pole piece 1, a pole piece inlet 202 and a pole piece outlet 203 are respectively formed in two sides of the die cutting bin 2, and the pole piece inlet 202 and the pole piece outlet 203 are respectively communicated with the accommodating space 201, so that the pole piece 1 can be conveyed into the accommodating space 201 from the pole piece inlet 202, and the pole piece 1 can be output from the accommodating space 201 through the pole piece outlet 203.
As a preferred possible embodiment, a gas supply device not shown in the drawings is positioned relative to the machine frame, in this embodiment, the gas supply device is preferably an existing nitrogen tank, and a nitrogen outlet of the gas supply device is communicated with the accommodating space 201 through a communication pipeline so as to supply nitrogen into the accommodating space 201, so that the risk of burning the pole pieces during the die cutting process can be reduced. In addition, in order to facilitate the control of the air pressure in the accommodating space 201, a pressure regulating valve is disposed on a communication pipeline between the nitrogen tank and the accommodating space 201.
It should be noted that, in the above structure, besides the gas supply device can supply nitrogen gas into the accommodating space 201, it is of course possible to supply other inert gas into the accommodating space 201 to prevent fire accidents due to the increase of the die cutting temperature.
In order to improve the safety of the system, a pressure difference detecting unit is disposed on the die-cutting chamber 2, and in this embodiment, the pressure difference detecting unit is preferably an existing micro-pressure difference meter, which is mounted at the bottom of the die-cutting chamber and is used for detecting the pressure difference between the accommodating space 201 and the external atmospheric pressure. It should be noted that the pressure difference detecting unit may be replaced by a pressure sensor for detecting the air pressure in the accommodating space 201.
In this embodiment, the pressure in the die-cutting chamber 2 needs to be controlled to be 5Pa to 10Pa higher than the atmospheric pressure. The micro differential pressure gauge is connected with an external control device, and in the die cutting process, when the pressure in the die cutting bin 2 is lower than the atmospheric pressure by 5Pa, the gas supply speed is accelerated, and when the pressure in the die cutting bin 2 is higher than the atmospheric pressure by more than 10Pa, the gas supply is slowed down or suspended.
As a preferable feasible scheme, a deionization fan 5 is further arranged on the rack, and is used for performing ion air blowing treatment on the pole piece 1 before being conveyed into the accommodating space 201, so as to remove static carried on the pole piece 1 before die cutting, and further improve the safety performance of the system.
In addition, still be equipped with a plurality of bearing rollers 4 on the frame to constitute the bearing to pole piece 1 to business turn over accommodation space 201, and still can carry out the guide effect to pole piece 1. It should be noted that, the conveying manner of the pole piece 1 and the structure of the pole piece conveying device can refer to the prior art, and are not described in detail here.
The main improvement of this embodiment is that a coolant flow channel 401 is provided in each backup roller 4, and is arranged to pass through the backup roller 4 in the longitudinal direction thereof so as to communicate with an external water supply device. As a further limitation to the structure, cold water with a lower temperature is preferably introduced into the cooling liquid circulation channel 401, and in a preferred embodiment, the water inlet temperature is controlled to be 5 ℃ to 7 ℃, and the water outlet temperature is preferably not higher than 12 ℃, so that a better cooling effect is achieved on the supported pole piece 1 by reducing the temperature of the support roller 4.
In order to further prevent the occurrence of danger, the surfaces of the support rollers 4 are coated with insulating protective layers 402. In this embodiment, the insulating protection layer 402 is preferably made of teflon, and substantially covers the entire outer circumferential surface of the support roller 4, so that the support roller 4 contacts the pole piece 1 through the insulating protection layer 402, thereby effectively preventing static electricity from being generated.
The pole piece die cutting system in this embodiment further includes a die cutting device, and the die cutting device mainly includes the die cutting assembly 3 disposed in the accommodating space 201. As shown in fig. 3, the die cutting assembly 3 mainly includes an upper die and a lower die, the upper die and the lower die are respectively disposed on the upper side and the lower side of the pole piece 1, and the upper die and the lower die can move relatively due to the driving of the external driving part, so as to perform die cutting on the pole piece 1 under the protection of inert gas. In this structure, the installation mode and the driving mode of the upper die and the lower die can both refer to the prior art, and the detailed description is omitted in this embodiment.
In a specific structure, as shown in fig. 4, the upper die includes an upper die body 301 and an upper knife 303 fixed to the upper die body 301. An upper mold cooling channel through which external cooling liquid can flow is arranged in the upper mold body 301, and in this embodiment, the shape of the upper mold cooling channel is not specifically limited, and the upper mold cooling channel may be serpentine or in other shapes, and the length of the upper mold cooling channel on the upper mold body 301 is extended as much as possible, and the channel volume on the upper mold body 301 is increased, and the upper mold cooling channel needs to be arranged close to the installation position of the upper mold 303 as much as possible, so as to achieve a better cooling effect.
In this structure, the upper mold cooling channel has an upper mold inlet 3011 and an upper mold outlet 3012 on the same side, and cooling water from an external water supply device can enter the upper mold cooling channel from the upper mold inlet 3011 and can flow out of the upper mold cooling channel from the upper mold outlet 3012. However, it is required to be limited that the inlet water temperature at the upper die inlet 3011 is preferably 5 to 7 ℃, and the outlet water temperature at the upper die outlet 3012 is preferably not more than 12 ℃ to ensure the cooling effect on the upper die body 301.
In addition, as a preferable feasible embodiment, guide post sleeves 3015 are further disposed at four corners of the upper die body 301 to be inserted into and matched with the guide posts 3025 described below to perform a guiding function. The upper die body 301 further has an upper die attachment surface 3013 to which a lower die attachment surface 3023 described below can be attached.
Four upper die exhaust holes 3014 are arranged on the upper die binding surface 3013 and can be communicated with the upper die binding surface 3013 and the accommodating space 201, so that exhaust can be performed in the die closing process of the upper die and the lower die, and smooth die closing is facilitated. In this structure, the number of the upper mold vent holes 3014 may be other than four, but may be other numbers, such as three, five, and the like. In addition, four positioning posts 3016 are formed on the upper die attachment surface 3013 to mate with positioning holes 3026 described below.
As shown in fig. 5, the lower die has a structure similar to that of the upper die, and includes a lower die body 302 and a lower blade 304 fixed to the lower die body 302. A lower mold cooling channel is arranged in the lower mold body 302, through which external cooling liquid can flow, the lower mold cooling channel has a lower mold inlet 3021 and a lower mold outlet 3022 located on the same side of the lower mold cooling channel, the arrangement of the lower mold cooling channel in the lower mold body 302 is similar to the arrangement of the upper mold cooling channel in the upper mold body 301, and details of this embodiment are not described again.
The main difference between the lower die body 302 and the upper die body 301 is that corresponding to the guide post sleeve 3015 on the upper die body 301, a guide post 3025 is formed on the lower die body 302, and the guide posts 3025 and the guide post sleeves 3015 are arranged in a one-to-one correspondence. In addition, positioning holes 3026 are formed in the lower die body 302 corresponding to the positioning posts 3016 on the upper die body 301, and the positioning holes 3026 and the positioning posts 3016 are arranged in a one-to-one correspondence.
In this embodiment, a lower die attachment surface 3023 is formed on the lower die main body 302, and the upper die and the lower die are moved relative to each other to close the dies by the driving of the external driving unit, and the upper die attachment surface 3013 is attached to and in contact with the lower die attachment surface 3023. A lower die exhaust hole 3024 is formed on the lower die attaching surface 3013 and can communicate with the lower die attaching surface 3023 and the accommodating space 201, so that gas between the upper die and the lower die is exhausted in the die closing process of the upper die and the lower die, and smooth die closing of the upper die and the lower die is facilitated.
In the above structure, the cooling channels are disposed on both the upper mold body 301 and the lower mold body 302, which has a better cooling effect, besides, it is also possible to dispose only the upper mold cooling channel on the upper mold body 301, or only the lower mold cooling channel on the lower mold body 302, but such a cooling effect is relatively poor.
In addition, in the above structure, the upper mold body 301 and the lower mold body 302 are both provided with vent holes, which is more beneficial for the smooth mold closing of the two, besides, it is needless to say that only the upper mold vent hole 3014 is provided on the upper mold body 301, or only the lower mold vent hole 3024 is provided on the lower mold body 302.
As a further limitation to the above structure, in the above structure, the upper knife 303 and the lower knife 304 are both made of ceramic materials, so as to effectively prevent static electricity from being generated during the die cutting process, and as for the specific shape and structure of the upper knife 303 and the lower knife 304, reference is still made to the prior art.
Meanwhile, the embodiment also relates to a pole piece die cutting method based on the pole piece die cutting system, the pole piece 1 is blown with ion wind firstly, then the pole piece 1 is conveyed into the containing space 201 with inert gas for die cutting, cooling liquid is introduced into the supporting rollers 4 for supporting the pole piece 1 in the conveying process for cooling treatment, cooling liquid is introduced into the upper die body 301 and the lower die body 302 for cooling treatment, the upper knife 303 and the lower knife 304 are ceramic knives, through the arrangement of the structure, the die cutting speed of the pre-lithium pole piece 1 is more than or equal to 280 pieces/minute, and the longitudinal size and the transverse size of die cutting burrs are less than or equal to 15 microns.
The pole piece die cutting system and the pole piece die cutting method can effectively ensure the safety of the die cutting and reprocessing process of the pre-lithium pole piece 1, can ensure the safe and smooth die cutting of the pre-lithium pole piece 1 under the condition of not reducing the speed, can ensure the safe die cutting, can also ensure the processing efficiency and quality, and have better practicability.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A pole piece die cutting system, comprising:
the die cutting machine comprises a rack, wherein a die cutting bin (2) with an accommodating space (201) is arranged on the rack, and a pole piece inlet (202) which can enable a pole piece (1) to be conveyed into the accommodating space (201) and a pole piece outlet (203) which can enable the pole piece (1) to be output from the accommodating space (201) are respectively formed in two sides of the die cutting bin (2);
a gas supply device positioned relative to the frame and configured to supply an inert gas into the accommodation space (201);
the die cutting device comprises a die cutting assembly (3) arranged in the accommodating space (201), wherein the die cutting assembly (3) comprises an upper die and a lower die, and is driven by an external driving part in a bearing mode, the upper die and the lower die can move relatively to each other so as to carry out die cutting on the pole piece (1) under the protection of inert gas.
2. The pole piece die cutting system of claim 1, wherein: go up the mould including last mould body (301), and set firmly in last mould body (301) on last sword (303), the lower mould includes lower mould body (302), and set firmly in lower sword (304) on lower mould body (302), just go up sword (303) with lower sword (304) all adopt ceramic material to make.
3. The pole piece die cutting system of claim 2, wherein: an upper die cooling channel through which external cooling liquid can flow is arranged in the upper die body (301), and/or a lower die cooling channel through which external cooling liquid can flow is arranged in the lower die body (302).
4. The pole piece die cutting system of claim 2, wherein: go up mould body (301) and have mould binding face (3013), just lower mould body (302) have can be because of the drive of external drive portion and with go up mould binding face (3013) lower mould binding face (3023) of laminating, in be equipped with on last mould body (301) with the intercommunication go up mould binding face (3013) with last mould exhaust hole (3014) of accommodation space (201), and/or be equipped with on lower mould body (302) with the intercommunication lower mould binding face (3023) with lower mould exhaust hole (3024) of accommodation space (201).
5. The pole piece die cutting system of claim 1, wherein: the frame is provided with a deionization fan (5), and the deionization fan (5) is configured to blow ion wind to the pole piece (1) before being conveyed into the accommodating space (201).
6. The pole piece die cutting system of claim 1, wherein: the frame is provided with a plurality of bearing rollers (4) for bearing the pole pieces (1) which enter and exit the accommodating space (201), and cooling liquid circulation channels (401) which are arranged in the bearing rollers (4) in a penetrating manner along the length direction of the bearing rollers are respectively arranged in the bearing rollers.
7. The pole piece die cutting system of claim 6, wherein: the surfaces of the bearing rollers (4) are respectively coated with an insulating protection layer (402).
8. The pole piece die cutting system of any one of claims 1 to 7, wherein: and a pressure regulating valve is arranged on a communication pipeline between the gas supply device and the accommodating space (201).
9. The pole piece die cutting system of claim 8, wherein: and a pressure difference detection unit for detecting the pressure difference between the accommodating space (201) and the external atmospheric pressure is arranged on the die cutting bin (2).
10. A die cutting method for pole pieces is characterized by comprising the following steps: the method comprises the steps of carrying out ion wind blowing treatment on a pole piece (1), and then conveying the pole piece (1) into an accommodating space (201) with inert gas for die cutting.
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| CN202110336128.5A CN113020399A (en) | 2021-03-29 | 2021-03-29 | Pole piece die cutting system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023093262A1 (en) * | 2021-11-29 | 2023-06-01 | 宁德时代新能源科技股份有限公司 | Electrode plate forming device |
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Application publication date: 20210625 |