CN115458710A - Pole piece manufacturing method - Google Patents
Pole piece manufacturing method Download PDFInfo
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- CN115458710A CN115458710A CN202211190983.0A CN202211190983A CN115458710A CN 115458710 A CN115458710 A CN 115458710A CN 202211190983 A CN202211190983 A CN 202211190983A CN 115458710 A CN115458710 A CN 115458710A
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- pole piece
- embossing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0481—Compression means other than compression means for stacks of electrodes and separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0433—Molding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0435—Rolling or calendering
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a pole piece manufacturing method, which comprises the following steps: firstly, embossing a plurality of embossing areas on the surface of a pole piece through embossing equipment, wherein a non-embossing area is arranged between every two adjacent embossing areas; winding the pole piece into a winding core; and step three, carrying out hot pressing or cold pressing on the winding core through a pressing device. Because the existence of the embossing area enables the apparent thickness of the pole piece to be thickened, after winding is completed, hot pressing is carried out on the winding core, the embossing area is flattened, the perimeter of the outer ring is lengthened, the perimeter reduced due to tension release is offset just, and the stress deformation of the winding core of the inner ring is avoided.
Description
Technical Field
The invention belongs to the technical field of batteries, and particularly relates to a pole piece manufacturing method.
Background
Lithium ion batteries are a type of high energy density battery that uses a non-aqueous electrolyte solution. The lithium ion battery comprises positive and negative pole pieces, the pole pieces of the existing square winding battery core are manufactured, the pole pieces directly enter a winding process after being rolled, and the surfaces of the pole pieces are flat, as shown in figure 1. For a square winding battery cell, a certain tension is applied to the positive and negative pole pieces and the diaphragm in the winding process, after the battery cell is wound, the outer ring pole pieces and the diaphragm contract along with the release of the tension, so that the circumference of the outer ring is reduced, and then the inner ring winding core is subjected to distortion deformation to adapt to the reduction of the circumference of the outer ring, so that the middle area of the winding core is bulged, as shown in fig. 2, black spots appear on the pole pieces at the distortion position, and the final finished product battery cell is super-thick.
Disclosure of Invention
Therefore, the invention aims to solve the problem that the winding core is easy to distort in the prior art.
Therefore, the technical scheme adopted is that the pole piece manufacturing method comprises the following steps:
firstly, embossing a plurality of embossing areas on the surface of a pole piece through embossing equipment, wherein a non-embossing area is arranged between every two adjacent embossing areas;
winding the pole piece into a winding core;
and step three, carrying out hot pressing on the winding core through a pressure device.
Preferably, the embossing apparatus comprises: the box, fixed plate, embossing plate and book core motor, box top interval are provided with the fixed plate of two vertical directions, are provided with the embossing plate between two fixed plates, and fixed plate one side is provided with rolls up the core motor, rolls up the core motor and is connected with the box top, rolls up core motor output shaft and rolls up the board and be connected, is provided with the pole piece between fixed plate and the embossing plate, and pole piece one end winding is on rolling up the board.
Preferably, guide wheels are arranged on two sides of the pole piece respectively and are connected with the box body in a rotating mode.
Preferably, the top end of the box body is provided with an opening, one side of the opening is provided with a first flat plate, the other side of the opening is provided with a second flat plate, a first sliding groove is formed in the first flat plate, a V-shaped groove is formed in the middle of the first sliding groove, the opening of the V-shaped groove faces upwards, a second sliding groove is formed in the second flat plate, a first swing rod is arranged between the first flat plate and the second flat plate, one end of the first swing rod is connected with the embossing plate, the other end of the first swing rod is provided with a first movable column and a second movable column, the first movable column penetrates through the first sliding groove, and the second movable column penetrates through the second sliding groove.
Preferably, a fixed block is arranged in the box body and connected with the inner wall of the box body, one end of a second swing rod is hinged to the fixed block, a first guide groove and a second guide groove are formed in the other end of the second swing rod at intervals, a first sliding block is connected in the first guide groove in a sliding mode, a second sliding block is connected in the second guide groove in a sliding mode, a first motor is arranged above the fixed block, an output shaft of the first motor is connected with one end of a crank, the other end of the crank is connected with the first sliding block in a rotating mode, and the second sliding block is connected with one end, far away from the first swing rod, of a second moving column in a rotating mode.
Preferably, a cleaning brush is arranged above the first flat plate, one end of the L-shaped connecting rod is connected with the cleaning brush, and the other end of the L-shaped connecting rod is connected with the top end of the fixing plate.
Preferably, the pressure device comprises: the workbench, the conveyer belt, the headstock, support arm and triangle-shaped board, the workstation top is provided with the conveyer belt, the conveyer belt top is provided with the headstock, the headstock passes through the support arm and is connected with the workstation, be provided with the triangle-shaped board on the headstock inner wall, be provided with the triangle-shaped spout on the triangle-shaped board, triangle-shaped board center department is provided with the second motor, second motor output shaft is connected with commentaries on classics board one end, be provided with the third guide way on the commentaries on classics board, sliding connection has the third slider in the third guide way.
Preferably, a slide rail in the horizontal direction is arranged below the triangular plate, a first moving block is connected to the slide rail in a sliding manner, a second moving block is connected to the first moving block vertically, the bottom end of the triangular plate is connected with one end of a connecting rod, the other end of the connecting rod is connected with the slide rail, a guide opening is formed in the bottom end of the power box, one end of a moving rod is connected with one end of a rotating shaft in a rotating manner, the other end of the rotating shaft penetrates through a third sliding block and extends into a triangular sliding groove, the rotating shaft is connected with a third sliding block, the other end of the moving rod penetrates through the second moving block, the guide opening is connected with a hot pressing plate, the moving rod is connected with the second moving block in a sliding manner, and an electric heating wire is arranged in the hot pressing plate.
Preferably, the outer wall of the power box is provided with a heat dissipation opening, and the heat dissipation opening is provided with a filter screen.
The technical scheme of the invention has the following advantages: the invention relates to a pole piece manufacturing method, which comprises the following steps: firstly, embossing a plurality of embossing areas on the surface of a pole piece through embossing equipment, wherein a non-embossing area is arranged between every two adjacent embossing areas; winding the pole piece into a winding core; and step three, carrying out hot pressing or cold pressing on the winding core through a pressing device. Because the existence of the embossing area enables the apparent thickness of the pole piece to be thickened, after winding is completed, hot pressing is carried out on the winding core, the embossing area is flattened, the perimeter of the outer ring is lengthened, the perimeter reduced due to tension release is offset just, and the stress deformation of the winding core of the inner ring is avoided.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a conventional pole piece;
FIG. 2 is a schematic diagram of a conventional pole piece wound with a core laid down;
FIG. 3 is a schematic structural view of the present invention;
FIG. 4 is a schematic view of a winding core associated with the present invention;
FIG. 5 is a diagram of a core after the embossing process of the present invention;
FIG. 6 is a top view of the embossing apparatus of the present invention;
FIG. 7 is a side view of the embossing apparatus of the present invention;
FIG. 8 is a schematic structural diagram of a second swing link according to the present invention;
FIG. 9 is a schematic view of the construction of the press apparatus of the present invention;
the drawings are numbered as follows: 1-pole piece, 2-embossing area, 3-non-embossing area, 4-winding core, 5-box, 6-fixing plate, 7-embossing plate, 8-winding core motor, 10-rolling plate, 11-guide wheel, 12-opening, 13-first flat plate, 14-second flat plate, 15-first sliding groove, 16-V groove, 17-second sliding groove, 18-first swing rod, 19-first moving column, 20-second moving column, 21-fixing block, 22-second swing rod, 23-first guide groove, 24-second guide groove, 25-first slide block, 26-a second sliding block, 27-a first motor, 28-a crank, 29-a cleaning brush, 30-an L-shaped connecting rod, 31-a workbench, 32-a conveyor belt, 33-a power box, 34-a supporting arm, 35-a triangular plate, 36-a triangular sliding groove, 37-a second motor, 38-a rotating plate, 39-a third guide groove, 40-a third sliding block, 41-a sliding rail, 42-a first moving block, 43-a second moving block, 46-a moving rod, 47-a rotating shaft, 48-a hot pressing plate, 49-a heat dissipation port and 50-a filter screen.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The embodiment of the invention provides a pole piece manufacturing method, as shown in figures 3-5, comprising the following steps:
firstly, embossing a plurality of embossing areas 2 on the surface of a pole piece 1 through embossing equipment, wherein a non-embossing area 3 is arranged between every two adjacent embossing areas 2;
step two, winding the pole piece 1 into a winding core 4;
and step three, carrying out hot pressing or cold pressing on the winding core 4 through a pressing device.
The embossed zone of the embossed zone 2 is circular or other shape.
The working principle and the beneficial technical effects of the technical scheme are as follows: the appearance thickness of the pole piece is thickened due to the existence of the embossing area, after winding is completed, the roll core 4 is subjected to hot pressing, the embossing area is flattened, the perimeter of the outer ring is lengthened, the perimeter reduced due to tension release is offset, and the stress deformation of the roll core 4 of the inner ring is avoided. When the pole piece is embossed, an embossed area 2 and a non-embossed area 3 need to be reserved, as shown in fig. 3, the embossed area corresponds to the straight position of the roll core, and the non-embossed area corresponds to the corner position of the roll core, as shown in fig. 4. The non-embossed area is reserved because the corner position is not stressed when a roll core is hot-pressed, and the embossed area in the pole pieces in the area can not be flattened, so that a large gap is formed between the positive pole piece and the negative pole piece, the area is charged, the distance of ion migration is increased, polarization is increased, lithium is separated out, and the performance of the battery cell is deteriorated.
In one embodiment, as shown in fig. 6-8, an embossing apparatus includes: box 5, fixed plate 6, embossed plate 7 and roll up core motor 8, 5 top intervals of box are provided with the fixed plate 6 of two vertical directions, are provided with embossed plate 7 between two fixed plates 6, and 6 one side of fixed plate is provided with rolls up core motor 8, rolls up core motor 8 and is connected on the 5 tops of box, rolls up core motor 8 output shaft and rolls up a board 10 and be connected, is provided with pole piece 1 between fixed plate 6 and the embossed plate 7, and the winding of 1 one end of pole piece is on rolling up board 10. The two sides of the pole piece 1 are respectively provided with a guide wheel 11, and the guide wheels 11 are rotatably connected with the box body 5. An opening 12 is formed in the top end of the box body 5, a first flat plate 13 is arranged on one side of the opening 12, a second flat plate 14 is arranged on the other side of the opening 12, a first sliding groove 15 is formed in the first flat plate 13, a V-shaped groove 16 is formed in the middle of the first sliding groove 15, the opening of the V-shaped groove 16 faces upwards, a second sliding groove 17 is formed in the second flat plate 14, a first swing rod 18 is arranged between the first flat plate 13 and the second flat plate 14, one end of the first swing rod 18 is connected with the embossing plate 7, a first moving column 19 and a second moving column 20 are arranged at the other end of the first swing rod 18, the first moving column 19 penetrates through the first sliding groove 15, and the second moving column 20 penetrates through the second sliding groove 17. A fixed block 21 is arranged in the box body 5, the fixed block 21 is connected with the inner wall of the box body 5, one end of a second swing rod 22 is hinged with the fixed block 21, a first guide groove 23 and a second guide groove 24 are arranged at the other end of the second swing rod 22 at intervals, a first sliding block 25 is connected in the first guide groove 23 in a sliding manner, a second sliding block 26 is connected in the second guide groove 24 in a sliding manner, a first motor 27 is arranged above the fixed block 21, an output shaft of the first motor 27 is connected with one end of a crank 28, the other end of the crank 28 is rotatably connected with the first sliding block 25, and the second sliding block 26 is rotatably connected with one end, far away from the first swing rod 18, of a second movable column 20. A cleaning brush 29 is arranged above the first flat plate 13, one end of an L-shaped connecting rod 30 is connected with the cleaning brush 29, and the other end of the L-shaped connecting rod 30 is connected with the top end of the fixed plate 6. The embossing plate 7 is provided with an embossed pattern on its surface.
The working principle and the beneficial technical effects of the technical scheme are as follows: the first motor 27 is started to drive the crank 28 to rotate, the crank 28 drives the first slider 25 to slide in the first guide groove 23 in a reciprocating mode, the second swing rod 22 swings in a reciprocating mode left and right, the first swing rod 18 drives the first swing rod 18 to slide in a reciprocating mode left and right, when the first moving column 19 moves through the V-shaped groove 16, the first swing rod 18 can turn over 180 degrees around the first moving column 19, correspondingly, the embossing plate 7 is driven to move in a reciprocating mode left and right, the middle position of the embossing plate can turn over 180 degrees back and forth, and therefore the embossing plate is in contact with the cleaning brush 29 to clean the surface of the embossing plate 7, before each embossing, the surface of the embossing plate 7 is clean, and the quality of embossed patterns is guaranteed. The roll core motor 8 drives the roll plate 10 to rotate and is used for winding the pressed electrode slice into a roll core.
In one embodiment, as shown in fig. 9, the pressure device includes: workstation 31, conveyer belt 32, headstock 33, support arm 34 and triangle-shaped board 35, workstation 31 top is provided with conveyer belt 32, the conveyer belt 32 top is provided with headstock 33, headstock 33 passes through support arm 34 and is connected with workstation 31, be provided with triangle-shaped board 35 on the headstock 33 inner wall, be provided with triangle-shaped spout 36 on the triangle-shaped board 35, triangle-shaped board 35 center department is provided with second motor 37, second motor 37 output shaft and commentaries on classics board 38 one end are connected, be provided with third guide way 39 on the commentaries on classics board 38, sliding connection has third slider 40 in the third guide way 39.
The slide rail 41 of horizontal direction is provided with below the triangle-shaped board 35, sliding connection has first movable block 42 on the slide rail 41, be connected with second movable block 43 on the first movable block 42 perpendicularly, the triangle-shaped board 35 bottom is connected with connecting rod 44 one end, the connecting rod 44 other end is connected with slide rail 41, headstock 33 bottom is provided with guiding opening 45, carriage release lever 46 one end is rotated with pivot 47 one end and is connected, the pivot 47 other end passes third slider 40 and extends to in the triangle-shaped spout 36, pivot 47 is connected with third slider 40, the carriage release lever 46 other end passes second movable block 43, guiding opening 45 is connected with hot pressboard 48, carriage release lever 46 and second movable block 43 sliding connection, be provided with electric heating wire in the hot pressboard 48, also can not heat and carry out the processing of colding pressing.
The working principle and the beneficial technical effects of the technical scheme are as follows: start second motor 37, it is rotatory to drive commentaries on classics board 38, make pivot 47 slide around triangle-shaped spout 36, pivot 47 drives movable rod 46 and removes, because the restriction that receives first movable block 42 horizontal displacement and the restriction of the vertical displacement of second movable block 43, make hot pressing plate 48 can press down along the arc orbit and carry out the hot pressing back with winding core 4 that twines, drive core 4 and continue the hot pressing, and move one section distance back forward, guarantee the effect of hot pressing, and the core is rolled up in the propelling movement forward, then along raising up the pitch arc again, thereby continuous carry out the hot pressing with the core on the conveyer belt 32, if there is not the core on the conveyer belt 32, it is gapped between the decurrent extreme position of hot pressing plate 48 and the conveyer belt 32, just can not contact with conveyer belt 32, also can not damage the conveyer belt.
In one embodiment, as shown in fig. 9, a heat dissipating opening 49 is formed on an outer wall of the power box 33, and a filtering net 50 is disposed on the heat dissipating opening 48, wherein the filtering net 50 can reduce dust from entering the power box 33.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A pole piece manufacturing method is characterized by comprising the following steps:
firstly, embossing a plurality of embossing areas on the surface of a pole piece through embossing equipment, wherein a non-embossing area is arranged between every two adjacent embossing areas;
winding the pole piece into a winding core;
and step three, carrying out hot pressing or cold pressing on the winding core through a pressing device.
2. A method according to claim 1, wherein the embossing device comprises: the box, fixed plate, embossing plate and book core motor, box top interval are provided with the fixed plate of two vertical directions, are provided with the embossing plate between two fixed plates, and fixed plate one side is provided with rolls up the core motor, rolls up the core motor and is connected with the box top, rolls up core motor output shaft and rolls up the board and be connected, is provided with the pole piece between fixed plate and the embossing plate, and pole piece one end winding is on rolling up the board.
3. A pole piece manufacturing method according to claim 2, wherein two sides of the pole piece are respectively provided with a guide wheel, and the guide wheels are rotatably connected with the box body.
4. A pole piece manufacturing method according to claim 2, wherein an opening is formed in the top end of the box body, a first flat plate is arranged on one side of the opening, a second flat plate is arranged on the other side of the opening, a first sliding groove is formed in the first flat plate, a V-shaped groove is formed in the middle of the first sliding groove, the opening of the V-shaped groove faces upwards, a second sliding groove is formed in the second flat plate, a first swing rod is arranged between the first flat plate and the second flat plate, one end of the first swing rod is connected with the embossing plate, a first moving column and a second moving column are arranged at the other end of the first swing rod, the first moving column penetrates through the first sliding groove, and the second moving column penetrates through the second sliding groove.
5. A pole piece manufacturing method as claimed in claim 4, wherein a fixed block is arranged in the box body, the fixed block is connected with the inner wall of the box body, one end of the second swing rod is hinged to the fixed block, a first guide groove and a second guide groove are arranged at the other end of the second swing rod at intervals, a first sliding block is connected in the first guide groove in a sliding mode, a second sliding block is connected in the second guide groove in a sliding mode, a first motor is arranged above the fixed block, an output shaft of the first motor is connected with one end of a crank, the other end of the crank is connected with the first sliding block in a rotating mode, and the second sliding block is connected with one end, far away from the first swing rod, of the second moving column in a rotating mode.
6. A pole piece manufacturing method according to claim 4, wherein a cleaning brush is arranged above the first flat plate, one end of the L-shaped connecting rod is connected with the cleaning brush, and the other end of the L-shaped connecting rod is connected with the top end of the fixing plate.
7. A way of making a pole piece according to claim 1, characterized in that the pressing means comprise: the workbench, the conveyer belt, the headstock, support arm and triangle-shaped board, the workstation top is provided with the conveyer belt, the conveyer belt top is provided with the headstock, the headstock passes through the support arm and is connected with the workstation, be provided with the triangle-shaped board on the headstock inner wall, be provided with the triangle-shaped spout on the triangle-shaped board, triangle-shaped board center department is provided with the second motor, second motor output shaft is connected with commentaries on classics board one end, be provided with the third guide way on the commentaries on classics board, sliding connection has the third slider in the third guide way.
8. The pole piece manufacturing method according to claim 7, wherein a slide rail is horizontally disposed below the triangular plate, a first moving block is slidably connected to the slide rail, a second moving block is vertically connected to the first moving block, the bottom end of the triangular plate is connected to one end of a connecting rod, the other end of the connecting rod is connected to the slide rail, a guide opening is disposed at the bottom end of the power box, one end of the moving rod is rotatably connected to one end of a rotating shaft, the other end of the rotating shaft extends into the triangular chute through the third sliding block, the rotating shaft is connected to the third sliding block, the other end of the moving rod passes through the second moving block, the guide opening is connected to the hot pressing plate, the moving rod is slidably connected to the second moving block, and an electric heating wire is disposed in the hot pressing plate.
9. The manufacturing method of the pole piece according to claim 8, wherein the outer wall of the power box is provided with a heat dissipation opening, and the heat dissipation opening is provided with a filter screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211190983.0A CN115458710B (en) | 2022-09-28 | 2022-09-28 | Pole piece manufacturing mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211190983.0A CN115458710B (en) | 2022-09-28 | 2022-09-28 | Pole piece manufacturing mode |
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| Publication Number | Publication Date |
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| CN115458710A true CN115458710A (en) | 2022-12-09 |
| CN115458710B CN115458710B (en) | 2023-05-09 |
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| CN115458710B (en) | 2023-05-09 |
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