CN112467187A - Winding battery cell manufacturing method and winding battery cell - Google Patents
Winding battery cell manufacturing method and winding battery cell Download PDFInfo
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- CN112467187A CN112467187A CN202011248488.1A CN202011248488A CN112467187A CN 112467187 A CN112467187 A CN 112467187A CN 202011248488 A CN202011248488 A CN 202011248488A CN 112467187 A CN112467187 A CN 112467187A
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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
- H01M10/0404—Machines for assembling batteries
- H01M10/0409—Machines for assembling batteries for cells with wound electrodes
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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
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/005—Devices for making primary cells
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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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Abstract
The embodiment of the invention discloses a winding battery cell and a manufacturing method thereof, wherein the method comprises the following steps: connecting the first lug to the first pole piece, and connecting the second lug to the second pole piece; the first pole piece, the first diaphragm, the second pole piece and the second diaphragm are sequentially placed to form a winding layer, the first pole lug is positioned on one side, close to the second pole piece, of the first pole piece, and the second pole lug is positioned on one side, away from the first pole piece, of the second pole piece; and winding the winding layer around a winding center to form a winding body, wherein the winding layer in the winding body sequentially comprises a second diaphragm, a second pole piece, a first diaphragm and a first pole piece from the outer side to the winding center. In the winding battery cell, the tab is positioned on the end face of the pole piece connected with the tab, which is far away from the winding center side, so that the contact surface of the tab and the pole piece is the middle position of the tab, the tab is pressed after winding, and the diaphragm is not easy to pierce, thereby improving the yield of the winding battery cell.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery core and a manufacturing method thereof.
Background
The cell is a component for storing electric energy in the battery, and for example, the wound cell is a structure formed by winding a pole piece and a diaphragm at an interval.
The tradition is convoluteed electric core and is included the positive plate, the negative pole piece, positive tab, negative pole ear and diaphragm, positive tab welding is on the positive plate, negative pole ear welding is on the negative plate, under the general condition, the positive plate, the diaphragm, after negative plate and diaphragm set gradually, closely coiling formation coiling electric core, the terminal surface that is close to center one side on positive tab and the positive plate is connected, the terminal surface that is close to center one side on negative tab and the negative plate is connected, easily lead to impaling the diaphragm after positive tab and negative pole ear pressurized, in order to lead to coiling electric core and scrap, the yield of electric core is convoluteed in the influence.
Disclosure of Invention
The invention aims to provide a winding battery cell manufacturing method and a winding battery cell, and aims to solve the problem that a lug pierces a diaphragm in the existing winding battery cell manufacturing method.
A method for manufacturing a winding battery cell comprises the following steps;
providing a first pole piece, a second pole piece, a first pole lug and a second pole lug, connecting the first pole lug to the first pole piece, and connecting the second pole lug to the second pole piece;
providing a first diaphragm and a second diaphragm, sequentially placing the first pole piece, the first diaphragm, the second pole piece and the second diaphragm to form a winding layer, and enabling the first pole lug to be located on one side, close to the second pole piece, of the first pole piece, and the second pole lug to be located on one side, away from the first pole piece, of the second pole piece;
and winding the winding layer around a winding center to form a winding body, wherein the winding layer in the winding body sequentially comprises the second diaphragm, the second pole piece, the first diaphragm and the first pole piece from the outer side to the winding center.
In one embodiment, the step of connecting the first tab to the first pole piece and the step of connecting the second tab to the second pole piece includes: and welding the first lug on the first pole piece, and welding the second lug on the second pole piece.
In one embodiment, after the first tab is welded to the first pole piece and the second tab is welded to the second pole piece, the welding position of the first tab and the first pole piece is subjected to insulation treatment, and the welding position of the second tab and the second pole piece is subjected to insulation treatment.
In one embodiment, the step of providing a first diaphragm and a second diaphragm, placing the first pole piece, the first diaphragm, the second pole piece and the second diaphragm in sequence to form a winding layer, and then adhesively connecting the edge of the first diaphragm with the edge of the second diaphragm.
In one embodiment, the method comprises the steps of providing a first diaphragm and a second diaphragm, sequentially placing the first pole piece, the first diaphragm, the second pole piece and the second diaphragm to form a winding layer, wherein the thickness of the first diaphragm and the thickness of the second diaphragm are both 28-35 um.
In one embodiment, a winding battery cell includes a first pole piece, a first diaphragm, a second pole piece, a second diaphragm, a first tab and a second pole, where the first tab is connected to the first pole piece, the second tab is connected to the second pole piece, the first diaphragm, the second pole piece and the second diaphragm are sequentially arranged and wound to form a winding body, the first tab is arranged on an end surface of the first pole piece facing away from one side of a center of the winding body, and the second pole piece is arranged on an end surface of the second pole piece facing away from one side of the center of the winding body.
In one embodiment, the first tab and the second tab are oppositely arranged on two sides of the center of the winding body.
In one embodiment, one of the first pole piece and the second pole piece is a positive pole piece, the other is a negative pole piece, the first tab is a positive pole tab or a negative pole tab corresponding to the first pole piece, and the second tab is a positive pole tab or a negative pole tab corresponding to the second pole piece.
In one embodiment, the first tab and the second tab are both strip-shaped metal strips.
In one embodiment, the first diaphragm and the second diaphragm are both continuous insulating isolation films.
The embodiment of the invention has the following beneficial effects:
the manufacturing method of the winding battery cell is adopted, the first pole piece, the first diaphragm, the second pole piece and the second diaphragm are sequentially placed to form a winding layer, the first pole lug is positioned on the first pole piece and close to one side of the second pole piece, and the second pole lug is positioned on the second pole piece and far away from one side of the first pole piece; and winding the winding layer around a winding center to form a winding body, wherein the winding layer in the winding body sequentially comprises a second diaphragm, a second pole piece, a first diaphragm and a first pole piece from the outer side to the winding center. The pole lug is positioned on the end face of the pole piece connected with the pole lug, which is far away from the winding center side, so that the contact surface of the pole lug and the pole piece is the middle position of the pole lug, the diaphragm is not easy to pierce by the pressed pole lug after winding, and the yield of the winding battery cell is improved.
By adopting the winding battery cell, the first pole piece, the first diaphragm, the second pole piece and the second diaphragm are sequentially arranged and wound to form a winding body, the first pole lug is arranged on the end face of the first pole piece on the side deviating from the center of the winding body, and the second pole lug is arranged on the end face of the second pole piece on the side deviating from the center of the winding body. In the winding battery cell, the contact surface of the pole lug and the pole piece is the middle position of the pole lug, and the diaphragm is not easy to pierce under the pressure of the pole lug after winding, so that the yield of the winding battery cell is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Wherein:
fig. 1 is a flow chart of a method of manufacturing a wound cell according to an embodiment;
fig. 2 is a schematic diagram of a wound cell in one embodiment;
fig. 3 is a schematic diagram of clockwise winding of a cell in an embodiment;
fig. 4 is a schematic diagram of a counterclockwise winding cell in an embodiment;
FIG. 5 is a schematic diagram of a first pole piece transfer in one embodiment;
FIG. 6 is a diagram illustrating transferring a second pole piece according to one embodiment.
In the figure: 100. a first pole piece; 200. a second pole piece; 300. a first tab; 400. a second tab; 500. a first diaphragm; 600. a second diaphragm; 101. a first front surface; 102. a first reverse side; 201. a second front surface; 202. a second, opposite surface.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 4, a method for manufacturing a wound electrical core according to an embodiment is mainly used for manufacturing a wound electrical core, and includes the following steps:
s10, providing a first pole piece 100, a second pole piece 200, a first tab 300 and a second tab 400, connecting the first tab 300 to the first pole piece 100, and connecting the second tab 400 to the second pole piece 200.
S20, providing a first diaphragm 500 and a second diaphragm 600, sequentially placing the first pole piece 100, the first diaphragm 500, the second pole piece 200, and the second diaphragm 600 to form a winding layer, and positioning the first tab 300 on the first pole piece 100 near the second pole piece 200, and positioning the second tab 400 on the second pole piece 200 away from the first pole piece 100.
S30, the wound layer is wound around a winding center to form a wound body, and the wound layer in the wound body is composed of, in order from the outside to the winding center, the second separator 600, the second pole piece 200, the first separator 500, and the first pole piece 100.
By adopting the manufacturing method of the winding battery cell, the pole lug is positioned on the end surface of the side, far away from the winding center, of the pole piece connected with the pole lug, so that the contact surface of the pole lug and the pole piece is the middle position of the pole lug, the pole lug is pressed after winding and is not easy to pierce a diaphragm, and the yield of the winding battery cell is improved.
In step 10, one of the first pole piece 100 and the second pole piece 200 is a positive pole piece, and the other is a negative pole piece, that is, a raw material for preparing a winding battery cell is provided, wherein a positive pole piece slurry is obtained by batching, the positive pole piece slurry is coated on the positive pole piece substrate, according to specific production requirements, pole piece rolling is performed, pole piece cutting and pole piece slitting are performed to obtain a positive pole piece according with the process size, similarly, negative pole piece slurry is obtained by batching, negative pole piece slurry is coated on the negative pole piece substrate, according to specific production requirements, pole piece rolling is performed, pole piece cutting and pole piece slitting are performed to obtain a negative pole piece according with the process size. When the first pole piece is a 100-bit positive pole piece, the provided first tab 300 is a positive tab, when the first pole piece is a 100-bit negative pole piece, the provided first tab 300 is a negative tab, when the second pole piece is a 200-bit positive pole piece, the provided second tab 400 is a positive tab, when the second pole piece is a 200-bit negative pole piece, the provided second tab 400 is a negative tab, and the positive tab and the negative tab are used for conveying electric energy to an external power utilization device.
In one embodiment, in step S10, the first tab 300 is connected to the first pole piece 100, and the second tab 400 is connected to the second pole piece 200, specifically: the first tab 300 is welded to the first pole piece 100, and the second tab 400 is welded to the second pole piece 200. And welding is adopted, so that the cost is low, the operation is easy, and mechanization and automation can be realized.
Preferably, the first pole piece 100 and the first pole tab 300 are welded by spot welding, the first pole tab 300 and the first pole piece 100 are welded together, the second pole piece 200 and the second pole tab 400 are welded by spot welding, the second pole tab 400 and the second pole piece 200 are welded together, the spot welding has the advantages of short heating time, heat concentration, low energy consumption and high efficiency, when the spot welding is adopted for welding, the heat concentration causes small heat affected zone of materials, deformation and stress, usually, after welding, correction operation and heat treatment operation are not needed, the spot welding process has the characteristics of low energy consumption and high production efficiency, the spot welding process does not need filling metals such as welding rods and welding wires, meanwhile, welding materials such as oxygen, acetylene, argon and the like are not needed, the welding cost is low, the operation is easy, mechanization and automation can be realized, no noise and harmful gas exist in the spot welding process, simple and safe, is suitable for industrial production and is widely applied.
Of course, soldering can also be adopted, the soldering cost is low, but high temperature is generated on the surface of the electrode lug, the high temperature generates an oxidation film on the surface of the metal, the weldability of the material is influenced, welding rods, welding wires and other filler metal fluxes are needed for soldering, harmful gas can be volatilized when the fluxes are heated, the operator is injured, false welding is easily caused, and the conductivity between the electrode lug and the pole piece is influenced. In some other embodiments, a conductive adhesive binder can be used to bond the tab to the pole piece, but the conductive adhesive has a complex preparation process and is easy to loosen and loose, so that the conductivity between the tab and the pole piece is affected.
After step S10, weld the first tab 300 to the first tab 100, weld the second tab 400 to the second tab 200, perform an insulation process on the welded joint between the first tab 300 and the first tab 100, and perform an insulation process on the welded joint between the second tab 400 and the second tab 200. Firstly, dust cleaning operation is carried out, namely after the first pole lug 300 is welded on the first pole piece 100, the first pole lug 300 and the first pole piece 100 are subjected to dust cleaning operation, and after the second pole lug 400 is welded on the second pole piece 200, the second pole lug 400 and the second pole piece 200 are subjected to dust cleaning operation. After the dust cleaning operation, the welding position of the first tab 300 and the first pole piece 100 is wrapped with the insulating gummed paper, that is, the welding position of the first tab 300 and the first pole piece 100 is subjected to insulating treatment. And (3) wrapping insulating gummed paper at the welding position of the second pole lug 400 and the second pole piece 200, namely, performing insulation treatment on the welding position of the second pole lug 400 and the second pole piece 200. And the welding position is subjected to insulation treatment, so that the short circuit phenomenon can be avoided, and the safety of the winding battery cell is improved. The insulation treatment adopts the insulation gummed paper for insulation operation, the operation is simple and convenient, the cost is low, and the production benefit is favorably improved.
Referring to fig. 5 and 6, in step S20, an unwinding mechanism and a winding mechanism are provided, a surface of the first pole piece 100 welded with the first tab is referred to as a first front surface 101, another surface of the first pole piece 100 is referred to as a first back surface 102, a surface of the second pole piece 200 welded with the second tab 400 is referred to as a second front surface 201, and another surface of the second pole piece 200 is referred to as a second back surface 202, and the unwinding mechanism transfers the first pole piece 100 to the winding mechanism according to an order of the first front surface 101 to the first back surface 102. Meanwhile, the unwinding mechanism transfers the second pole piece 200 to the winding mechanism in the order of the second front side 201 to the second back side 202, however, in some other embodiments, the unwinding mechanism may transfer the first pole piece 100 to the winding mechanism in the order of the first back side 102 to the first front side 101, and the second pole piece 200 transfers the pole pieces to the winding mechanism in the order of the second back side 202 to the second front side 201. Meanwhile, a first diaphragm 500 and a second diaphragm 600 with proper sizes are provided according to the first pole piece 100 and the second pole piece 200, the unwinding mechanism respectively sends the first pole piece 100, the first diaphragm 500, the second pole piece 200 and the second diaphragm 600 to the winding mechanism, and the first pole piece 100, the first diaphragm 500, the second pole piece 200 and the second diaphragm 600 are sequentially stacked to form a winding layer, wherein the first front surface 101 faces the first diaphragm 500, the second back surface 202 faces the first diaphragm 500, and the second front surface 201 faces the second diaphragm 600.
In an embodiment, in step S20, a first separator 500 and a second separator 600 are provided, the first pole piece 100, the first separator 500, the second pole piece 200, and the second separator 600 are sequentially placed to form a winding layer, then the edge of the first separator 500 is bonded to the edge of the second separator 600, and the second pole piece 200 is wrapped between the first separator 500 and the second separator 600, specifically, the first separator 500 and the second separator 600 are respectively melted and bonded, the hot pressing temperature is controlled to 160 ℃ to 200 ℃, and the hot pressing time is controlled to 0.4S to 0.8S. The higher the temperature is, the faster the edge of the first membrane 500 and the edge of the second membrane 600 are melted and bonded, when the hot pressing temperature is less than 160 ℃, the temperature is lower, the effect of melting rapidly cannot be achieved, and the normal operation of melting and bonding is affected, when the hot pressing temperature is greater than 200 ℃, the temperature is too high, although the first membrane 500 and the second membrane 600 can be melted rapidly, but because the first membrane 500 and the second membrane 600 are thin-film structures, the structures of the first membrane 500 and the second membrane 600 are easily damaged by the too high temperature, poor bonding between the first membrane 500 and the second membrane 600 may occur, and the preferred control hot pressing temperature is 170 ℃ and the hot pressing time is 0.6 s. Because translocation phenomenon easily appears in the pole piece in the winding process, the first diaphragm 500 and the second diaphragm 600 are bonded to wrap the second pole piece 200, translocation of the second pole piece 200 can be prevented, the phenomenon of short circuit caused by contact of the two pole pieces in the winding process is prevented, and the yield of the battery cell and the quality of a finished product are improved.
Of course, in some other embodiments, before the first pole piece 100, the first membrane 500, the second pole piece 200, and the second membrane 600 are sequentially placed to form the winding layer in step S20, the edge of the first membrane 500 and the edge of the second membrane 600 are respectively bonded by thermocompression bonding, the first membrane 500 can be melt-bonded by performing the thermocompression bonding operation on the edge of the first membrane 500, so as to implement the bag-making operation of the first membrane 500, the first pole piece 100 is wrapped in the bag-making operation of the first membrane 500 to form the first assembly, similarly, the second membrane 600 can be melt-bonded by performing the thermocompression bonding operation on the edge of the second membrane 600, so as to implement the bag-making operation of the second membrane 600, the second pole piece 200 is wrapped in the bag-making operation of the second membrane 600 to form the second assembly, and the first assembly and the second assembly are laminated to form the winding layer, and the laminating process is to ensure the relative positions of the first pole tab 300 and the first pole piece 100 and the second pole tab 400 and the second pole tab 600 and the winding layer The relative positions of pole pieces 200 are consistent. The first diaphragm 500 and the second diaphragm 600 respectively coat the first pole piece 100 and the second pole piece 200, the first diaphragm 500 can protect the first pole piece 100, the second diaphragm 600 can protect the second pole piece 200, the pole pieces are prevented from being brittle and broken, and the phenomenon that the first pole piece 100 and the second pole piece 200 are in contact short circuit due to translocation is also prevented.
In one embodiment, in step S20, the first diaphragm 500 and the second diaphragm 600 are both provided with a thickness of 28um to 35 um. Further, the thinner the first separator 500 is, the better the first separator 500 can be attached to the first pole piece 100, when the thickness of the first separator 500 is less than 28um, although the first separator 500 can be attached to the first pole piece 100 better, the thickness value of the first separator 500 is smaller, which increases the difficulty of the separator production process, and meanwhile, the thinner the first separator 500 is, the more easily the first separator is broken during the winding process; when the thickness value of first diaphragm 500 is greater than 35um, first diaphragm 500 is thick, influences the laminating effect, need input more diaphragm raw materials moreover, has increased manufacturing cost, and under the comprehensive consideration, first diaphragm 500's thickness sets up to 28um ~ 35 um. Similarly, the thinner the second separator 600 is, the better the second electrode 200 can be attached to, when the thickness of the second separator 600 is smaller than 28um, although the second electrode 200 can be attached to better, the thickness of the second separator 600 is smaller, which increases the difficulty of the production process of the separator, and meanwhile, the thinner the second separator 600 is, the more easily the second separator is broken; when the thickness of second diaphragm 600 is greater than 35um, second diaphragm 600 is thick, influences the laminating effect, need drop into more diaphragm raw materials moreover, has increased manufacturing cost, and under the comprehensive consideration, the thickness of second diaphragm 600 sets up to 28um ~ 35 um. Preferably, the first and second diaphragms 500 and 600 each have a thickness of 30 um.
Referring to fig. 3 and 4, in step S30, the step of winding the winding layer around a winding center to form a winding body includes: the winding layer is wound clockwise around a winding center to form a winding body, or the winding layer is wound counterclockwise around a winding center to form a winding body. In one embodiment, the wound layers are wound clockwise about the center of winding, which ensures that first pole piece 100 is the innermost layer and second separator 600 is the outermost layer. Of course, in some other embodiments, the wound layers are wound counterclockwise from the winding center to form a wound body while ensuring that the first pole piece 100 is at the innermost layer and the second separator 600 is at the outermost layer. Wherein the winding layer is wound more than one turn around a winding center to form a wound body.
Further, the winding mechanism can wind the winding layer for N turns, wherein N is not less than 1, and the specific value of N can be determined according to production requirements. A pole piece shearing mechanism and a diaphragm shearing device are provided, the pole piece shearing mechanism is used for shearing a first pole piece 100 and a second pole piece 200, a flat shearing plane is ensured to be formed in the shearing process, and burrs are prevented from being formed. The diaphragm cutting device cuts the first diaphragm 500 and the second diaphragm 600. Therefore, the winding battery cell is obtained, the winding process is simple and convenient to operate, can be completed quickly, and is easy to realize industrial automation, namely, the winding process is high in production efficiency and suitable for industrial production.
In one embodiment, the first pole piece 100 is a positive pole piece, the first tab 300 is a positive pole piece, the second pole piece 200 is a negative pole piece, the second tab 400 is a negative pole piece, the first diaphragm 500 and the second diaphragm 600 are both continuous insulating isolation films, before winding, the distance of one winding circle is estimated, the positive tab is welded to the distance of one winding circle away from the winding starting end, and the negative tab is welded to the distance of one half winding away from the winding starting end, so that the two tabs are ensured to be arranged on two sides of the center of the winding body. Of course, in some other embodiments, the positive tab is welded at a distance of one turn from the winding start end and the negative tab is welded at a distance of one and a half turns from the winding start end while ensuring that both tabs are disposed on both sides of the center of the winding body.
Further, a pole piece shearing mechanism and a diaphragm shearing device are provided, the pole piece shearing mechanism shears the first pole piece 100 and the second pole piece 200, and in the shearing process, a flat shearing plane is ensured to be formed, and burrs are prevented from being formed. The diaphragm cutting device cuts the first diaphragm 500 and the second diaphragm 600. Therefore, the winding battery cell is obtained, the winding process is simple and convenient to operate, can be completed quickly, and is easy to realize industrial automation, namely, the winding process is high in production efficiency and suitable for industrial production.
Referring to fig. 2, a winding battery cell includes a first pole piece 100, a first diaphragm 500, a second pole piece 200, a second diaphragm 600, a first tab 300, and a second tab 400, where the first tab 300 is connected to the first pole piece 100, the second tab 400 is connected to the second pole piece 200, the first pole piece 100, the first diaphragm 500, the second pole piece 200, and the second diaphragm 600 are sequentially disposed and wound to form a winding body, the first tab 300 is disposed on an end surface of the first pole piece 100 that is away from a center side of the winding body, and the second tab 400 is disposed on an end surface of the second pole piece 200 that is away from the center side of the winding body. In the winding cell, the pole lug is positioned on the end face of the pole piece connected with the pole lug, which is far away from the winding center, in the winding cell, the contact surface of the pole lug and the pole piece is the middle position of the pole lug, and the diaphragm is not easy to pierce by the pressed pole lug after winding, so that the yield of the winding cell is improved. .
In one embodiment, the first tab 300 is disposed opposite to the second tab 400 on both sides of the center of the jelly roll. The utmost point ear is used for carrying the electric energy to outside power consumption device, needs to be connected with outside power consumption device, and two utmost point ears set up relatively the both sides at coiling body center can increase the distance of two utmost point ears, avoids leading out the end contact of two utmost point ears, causes two utmost point ear short circuits, improves the yield of coiling electricity core.
In an embodiment, first pole piece 100 is the positive plate, first utmost point ear 300 is the positive tab, second pole piece 200 is the negative pole piece, second pole piece 400 is the negative pole ear, of course, in other embodiments, first pole piece 100 still can be the negative pole piece, first utmost point ear 300 still can be the negative pole ear, second pole piece 200 still can be for the positive plate, second utmost point ear 400 still can be for the positive tab, according to concrete production needs, roll-in through the pole piece, the pole piece is cut and is got the positive plate that accords with the technology size, and is the same, according to concrete production needs, roll-in through the pole piece, the pole piece is cut and is got the negative pole piece that accords with the technology size, positive tab and negative pole ear are used for. Furthermore, the positive electrode lug and the negative electrode lug are strip-shaped metal strips, and the metal strips are convenient to bend and cut.
In one embodiment, the first and second diaphragms 500 and 600 are each a continuous insulating separator. The first pole piece 100 and the second pole piece 200 in the winding battery cell can be prevented from contacting, the pole pieces are prevented from being short-circuited, and the yield of the winding battery cell is improved.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (10)
1. A method for manufacturing a wound battery cell is characterized by comprising the following steps:
providing a first pole piece, a second pole piece, a first pole lug and a second pole lug, connecting the first pole lug to the first pole piece, and connecting the second pole lug to the second pole piece;
providing a first diaphragm and a second diaphragm, sequentially placing the first pole piece, the first diaphragm, the second pole piece and the second diaphragm to form a winding layer, and enabling the first pole lug to be located on one side, close to the second pole piece, of the first pole piece, and the second pole lug to be located on one side, away from the first pole piece, of the second pole piece;
and winding the winding layer around a winding center to form a winding body, wherein the winding layer in the winding body sequentially comprises the second diaphragm, the second pole piece, the first diaphragm and the first pole piece from the outer side to the winding center.
2. The method according to claim 1, wherein the step of attaching the first tab to the first pole piece and the step of attaching the second tab to the second pole piece comprises: and welding the first lug on the first pole piece, and welding the second lug on the second pole piece.
3. The method of manufacturing a wound cell according to claim 2, wherein the step of welding the first tab to the first pole piece, and after welding the second tab to the second pole piece, performing insulation treatment on a welded portion of the first tab and the first pole piece, and performing insulation treatment on a welded portion of the second tab and the second pole piece.
4. The method of manufacturing the wound cell of claim 1, wherein the steps of providing a first separator and a second separator, and after the first pole piece, the first separator, the second pole piece and the second separator are sequentially placed to form a wound layer, adhesively connecting an edge of the first separator with an edge of the second separator.
5. The method of manufacturing a wound electrical core according to claim 4, wherein the step of providing a first separator and a second separator comprises sequentially placing the first pole piece, the first separator, the second pole piece, and the second separator to form a winding layer, and the thickness of the first separator and the thickness of the second separator are both 28um to 35 um.
6. The utility model provides a coiling electricity core, its characterized in that includes first pole piece, first diaphragm, second pole piece, second diaphragm, first utmost point ear and second pole, first utmost point ear with first pole piece is connected, second utmost point ear with the second pole piece is connected, first pole piece first diaphragm the second pole piece with the second diaphragm sets gradually and convolutes and form the coiling body, first utmost point ear set up in deviate from on the first pole piece on the terminal surface of coiling body center one side, the second utmost point ear set up in deviate from on the second pole piece on the terminal surface of coiling body center one side.
7. The winding cell of claim 6, wherein the first tab is disposed opposite the second tab on either side of a center of the winding body.
8. The wound electric core of claim 6, wherein one of the first and second pole pieces is a positive pole piece, the other is a negative pole piece, the first tab is a positive or negative pole tab corresponding to the first pole piece, and the second tab is a positive or negative pole tab corresponding to the second pole piece.
9. The wound cell of claim 8, wherein the first tab and the second tab are each a strip-shaped metal strip.
10. The wound cell of claim 6, wherein the first separator and the second separator are both continuous insulating separators.
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| CN202011248488.1A CN112467187A (en) | 2020-11-10 | 2020-11-10 | Winding battery cell manufacturing method and winding battery cell |
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| CN202011248488.1A CN112467187A (en) | 2020-11-10 | 2020-11-10 | Winding battery cell manufacturing method and winding battery cell |
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| CN (1) | CN112467187A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114551912A (en) * | 2022-02-11 | 2022-05-27 | 广东微电新能源有限公司 | Roll core and button battery manufacturing method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834318A (en) * | 2009-03-13 | 2010-09-15 | 上海卡能迪蓄能科技有限公司 | Electric core structure of lithium battery |
| CN202523782U (en) * | 2012-01-31 | 2012-11-07 | 深圳市量能科技有限公司 | Battery cell and winding-type battery |
| CN202977592U (en) * | 2012-12-06 | 2013-06-05 | 湖北宇隆新能源有限公司 | Pole piece for lithium ion battery, winding battery core body and lithium ion battery |
| CN204905342U (en) * | 2015-08-05 | 2015-12-23 | 天能电池集团有限公司 | Cylinder type lithium ion battery utmost point ear and lithium ion battery who uses this utmost point ear |
| CN106356569A (en) * | 2016-09-26 | 2017-01-25 | 惠州市恒泰科技股份有限公司 | Winding type battery and manufacturing method thereof |
| CN206490135U (en) * | 2016-12-27 | 2017-09-12 | 宁德新能源科技有限公司 | A kind of takeup type battery core |
| CN109361010A (en) * | 2018-12-08 | 2019-02-19 | 广东维都利新能源有限公司 | A kind of discoid poly-lithium battery of takeup type and preparation method thereof |
| CN110611116A (en) * | 2019-09-26 | 2019-12-24 | 广东微电新能源有限公司 | Electrode plate for battery roll core and columnar or button battery |
| CN111162323A (en) * | 2019-12-30 | 2020-05-15 | 东莞维科电池有限公司 | Winding type lithium ion battery cell and preparation method thereof |
| CN111477973A (en) * | 2020-03-31 | 2020-07-31 | 惠州市恒泰科技股份有限公司 | Winding battery cell, preparation process of winding battery cell and lithium ion battery |
-
2020
- 2020-11-10 CN CN202011248488.1A patent/CN112467187A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834318A (en) * | 2009-03-13 | 2010-09-15 | 上海卡能迪蓄能科技有限公司 | Electric core structure of lithium battery |
| CN202523782U (en) * | 2012-01-31 | 2012-11-07 | 深圳市量能科技有限公司 | Battery cell and winding-type battery |
| CN202977592U (en) * | 2012-12-06 | 2013-06-05 | 湖北宇隆新能源有限公司 | Pole piece for lithium ion battery, winding battery core body and lithium ion battery |
| CN204905342U (en) * | 2015-08-05 | 2015-12-23 | 天能电池集团有限公司 | Cylinder type lithium ion battery utmost point ear and lithium ion battery who uses this utmost point ear |
| CN106356569A (en) * | 2016-09-26 | 2017-01-25 | 惠州市恒泰科技股份有限公司 | Winding type battery and manufacturing method thereof |
| CN206490135U (en) * | 2016-12-27 | 2017-09-12 | 宁德新能源科技有限公司 | A kind of takeup type battery core |
| CN109361010A (en) * | 2018-12-08 | 2019-02-19 | 广东维都利新能源有限公司 | A kind of discoid poly-lithium battery of takeup type and preparation method thereof |
| CN110611116A (en) * | 2019-09-26 | 2019-12-24 | 广东微电新能源有限公司 | Electrode plate for battery roll core and columnar or button battery |
| CN111162323A (en) * | 2019-12-30 | 2020-05-15 | 东莞维科电池有限公司 | Winding type lithium ion battery cell and preparation method thereof |
| CN111477973A (en) * | 2020-03-31 | 2020-07-31 | 惠州市恒泰科技股份有限公司 | Winding battery cell, preparation process of winding battery cell and lithium ion battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114551912A (en) * | 2022-02-11 | 2022-05-27 | 广东微电新能源有限公司 | Roll core and button battery manufacturing method |
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