CN112768625A - Battery cell for counteracting electromagnetic field, soft-package lithium battery and manufacturing method thereof - Google Patents
Battery cell for counteracting electromagnetic field, soft-package lithium battery and manufacturing method thereof Download PDFInfo
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- CN112768625A CN112768625A CN202110040375.0A CN202110040375A CN112768625A CN 112768625 A CN112768625 A CN 112768625A CN 202110040375 A CN202110040375 A CN 202110040375A CN 112768625 A CN112768625 A CN 112768625A
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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
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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
- H01M10/052—Li-accumulators
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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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- 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
Abstract
The invention discloses an electric core for counteracting an electromagnetic field, a soft package lithium battery and a manufacturing method thereof, wherein the electric core comprises a roll core body, the winding core body is formed by stacking and winding a rectangular first diaphragm, a rectangular positive plate, a rectangular second diaphragm, a rectangular negative plate and a rectangular third diaphragm, the surface of the winding core body is coated with a circle of first aluminum-plastic film, one end of the positive plate is connected with a positive pole lug, the anode tab is vertically led out from the length direction of the anode plate, one end of the cathode plate is connected with the cathode tab, the negative pole tab is vertically led out from the length direction of the negative pole piece, the length of the positive pole piece is equal to that of the negative pole piece, the invention provides a battery core for offsetting an electromagnetic field, a soft package lithium battery and a manufacturing method thereof, the soft package lithium battery is simple in structure and manufacturing method, can offset electromagnetic fields generated in the charging and discharging processes of the lithium battery, and avoids influencing the normal work and precision of precision components sensitive to the electromagnetic fields.
Description
Technical Field
The invention relates to the technical field of soft package lithium batteries, in particular to a battery core for offsetting an electromagnetic field, a soft package lithium battery and a manufacturing method thereof.
Background
The outer packing materials of the lithium battery are divided into a soft package and a hard package, and compared with hard packing materials such as a steel shell, an aluminum shell and the like, the soft packing material made of the multilayer film has the advantages of light weight, large capacity, high safety, free selection of packing shapes and the like.
Soft packet of lithium cell generally installs inside the components and parts that small, precision is high and space restriction is comparatively strict, for example mouse, cell-phone and bluetooth headset etc..
At present, coiling shaping's electric core body generally adopts positive plate or negative pole piece to carry out the ending at the end, has caused the length nonconformity of positive plate or negative pole piece for the lithium cell is in the charging and the discharge in-process, and lithium cell itself will produce weak electromagnetic field, and the interference that causes equipment under general condition is not strong, can ignore, but if the lithium cell is installed in the more sensitive precision components and parts of electromagnetic field, if: bluetooth headset, lithium cell will produce certain interference and influence to the loudspeaker magnetic field in the Bluetooth headset at the in-process that charges and discharges to influence Bluetooth headset's broadcast quality, form noise or noise, so it has positive meaning to produce a battery and soft packet of lithium cell that do not have electromagnetic interference.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the electric core for offsetting the electromagnetic field, the soft package lithium battery and the manufacturing method thereof.
In order to achieve the purpose, the invention provides an electric core for counteracting an electromagnetic field, which comprises a winding core body, wherein the winding core body is formed by stacking and winding a rectangular first diaphragm, a positive plate, a second diaphragm, a negative plate and a third diaphragm, a circle of first aluminum-plastic film is coated on the surface of the winding core body, one end of the positive plate is connected with a positive pole lug, the positive pole lug is vertically led out from the length direction of the positive plate, one end of the negative plate is connected with a negative pole lug, the negative pole lug is vertically led out from the length direction of the negative plate, and the length of the positive plate is equal to that of the negative plate.
Preferably, the positive electrode tab and the negative electrode tab are in the same direction or opposite directions.
Preferably, the positive electrode lug and the negative electrode lug are vertically bent to the side face of the winding core body step by step and horizontally extend, and the positive electrode lug and the negative electrode lug are positioned at the same height of the side face of the winding core body after being bent.
Preferably, the angle between the positive electrode tab and the negative electrode tab is between 0 and 180 degrees.
Preferably, the width of the positive electrode sheet and the negative electrode sheet is set to be 3 to 8mm, and the length thereof is set to be 50 to 1000 mm.
Preferably, the positive electrode tab is an aluminum-to-nickel electrode tab, the negative electrode tab is a nickel electrode tab, the positive electrode tab is connected with the positive electrode plate through welding, riveting or punching, and the negative electrode tab is connected with the negative electrode plate through welding, riveting or punching.
The invention also provides a soft package lithium battery for counteracting the electromagnetic field, which comprises the electric core for counteracting the electromagnetic field, wherein the winding core body is formed by the second aluminum-plastic film and the third aluminum-plastic film through hot-press sealing after being vertically wrapped, a sealing edge is formed between the second aluminum-plastic film and the third aluminum-plastic film, and a positive electrode lug and a negative electrode lug extend out of the electric core body.
Preferably, the joint of the positive electrode lug and the sealing edge is coated with positive electrode lug glue, and the joint of the negative electrode lug and the sealing edge is coated with negative electrode lug glue.
Preferably, the sealing edge is attached to the cell main body, an included angle between the positive electrode tab and the axis of the cell main body is 0-90 degrees, and an included angle between the negative electrode tab and the axis of the cell main body is 0-90 degrees.
The invention also provides a manufacturing method for manufacturing the soft package lithium battery for counteracting the electromagnetic field, which comprises the following steps:
step S1: manufacturing a pole piece and welding a pole lug, cutting a rectangular positive pole piece and a rectangular negative pole piece, cutting the length of the positive pole piece and the length of the negative pole piece to be equal, vertically welding the positive pole lug in the length direction of the positive pole piece, and vertically welding the negative pole lug in the length direction of the negative pole piece;
step S2: manufacturing a winding core body, stacking a rectangular first diaphragm, a rectangular positive plate, a rectangular second diaphragm, a rectangular negative plate and a rectangular third diaphragm in sequence, and then winding to manufacture the winding core body;
step S3: fixing the winding core body, and coating a circle of first aluminum-plastic film on the surface of the wound winding core body;
step S4: bending the tabs, namely vertically bending the positive electrode tabs and the negative electrode tabs step by step to the side face of the winding core body and horizontally extending the positive electrode tabs and the negative electrode tabs, wherein the positive electrode tabs and the negative electrode tabs are positioned at the same height of the side face of the winding core body after being bent;
step S5: sealing the aluminum-plastic film, namely placing the winding core body between a second aluminum-plastic film and a third aluminum-plastic film to form a cell main body through hot-press sealing molding, wherein a sealing edge is formed between the second aluminum-plastic film and the third aluminum-plastic film, and a positive electrode lug and a negative electrode lug extend out of the cell main body;
step S6; injecting, activating and resealing, injecting electrolyte into the roll core body, activating the roll core body, and resealing and packaging;
step S7; shaping and folding, trimming the appearance of the battery cell main body through a blanking tool, subtracting redundant aluminum-plastic films, and bending the sealing edge towards the axial direction, wherein the sealing edge is closely attached to the surface of the battery cell main body.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the first diaphragm, the positive plate, the second diaphragm, the negative plate and the third diaphragm are stacked and then wound to form the winding core body, wherein the length of the positive plate is equal to that of the negative plate, when the lithium battery is in discharge operation, the currents in the positive plate and the negative plate are mutually reverse currents, and because the length of the positive plate is equal to that of the negative plate, electromagnetic fields generated by the currents in the positive plate and the negative plate can be mutually offset during discharge, no redundant positive plate or negative plate generates an electromagnetic field, and the normal operation and precision of a precision component sensitive to the electromagnetic field can be prevented from being influenced; similarly, when the lithium battery is charged, the currents in the positive plate and the negative plate are opposite currents, and the lengths of the positive plate and the negative plate are equal, so that electromagnetic fields generated by the currents of the positive plate and the negative plate can be mutually offset during charging, unnecessary electromagnetic fields generated by the positive plate or the negative plate are avoided, and the normal work and precision of precision components sensitive to the electromagnetic fields can be avoided.
2. The invention adopts the mode of stacking and winding to manufacture the roll core body, has simple structure and manufacturing method, can effectively improve the energy density of the lithium battery, and is suitable for being assembled on more flexible wearable electronic products.
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 introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of one side of a cross section of a winding core body of a battery cell for canceling an electromagnetic field, provided by the invention;
fig. 2 is another schematic diagram of the cross section of the winding core body of the electric core for canceling the electromagnetic field, provided by the invention;
fig. 3 is a schematic diagram of a positive plate and a positive tab connection of a battery cell for canceling an electromagnetic field according to the present invention;
fig. 4 is a schematic diagram of the negative pole piece and the negative pole tab connection of the electric core for counteracting the electromagnetic field provided by the invention;
fig. 5 is a front view of a tab of a winding core body of a battery cell for canceling an electromagnetic field, which is provided by the invention, after being bent;
fig. 6 is a schematic current direction diagram of a discharging process of a winding core body of a battery cell for canceling an electromagnetic field according to the present invention;
fig. 7 is a schematic current direction diagram of a charging process of a winding core body of a battery cell for canceling an electromagnetic field according to the present invention;
fig. 8 is a schematic structural diagram of a cell main body of a soft-package lithium battery for counteracting an electromagnetic field, provided by the invention;
fig. 9 is a front view of a cell main body of a soft-packed lithium battery for counteracting an electromagnetic field, provided by the invention;
fig. 10 is a schematic structural diagram of a soft-package lithium battery with electromagnetic field cancellation after shaping and folding a battery core main body.
The figure includes:
31-a first diaphragm, 1-a positive plate, 32-a second diaphragm, 2-a negative plate, 33-a third diaphragm, 4-a winding core body, 5-a positive pole tab, 91-a positive pole tab glue, 92-a negative pole tab glue, 6-a negative pole tab, 81-a first aluminum-plastic film, 82-a second aluminum-plastic film, 83-a third aluminum-plastic film, 10-a sealing edge and 7-a battery cell main body.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are one embodiment of the present invention, and not all embodiments of the present invention. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
Example one
Referring to fig. 1 to 7, a first embodiment of the present invention provides a battery cell without electromagnetic interference, which includes a winding core body 4, as shown in fig. 1 and 2, the winding core body 4 is formed by stacking and winding a rectangular first separator 31, a rectangular positive electrode sheet 1, a rectangular second separator 32, a rectangular negative electrode sheet 2, and a rectangular third separator 33, and a circle of first aluminum-plastic film 81 is coated on a surface of the winding core body 4, so that the winding core body 4 manufactured by winding after stacking has a simple structure and a simple manufacturing method, and can effectively increase energy density of a lithium battery, so as to be suitable for being assembled on more flexible wearable electronic products.
As shown in fig. 3, one end of the positive plate 1 is connected with a positive tab 5, the positive tab 5 is vertically led out from the length direction of the positive plate 1, as shown in fig. 4, one end of the negative plate 2 is connected with a negative tab 6, the negative tab 6 is vertically led out from the length direction of the negative plate 2, and the length of the positive plate 1 is equal to that of the negative plate 2.
Specifically, as shown in fig. 5, when the lithium battery operates in a discharging mode, the currents in the positive plate 1 and the negative plate 2 are opposite currents, and since the length of the positive plate 1 is equal to the length of the negative plate 2, the electromagnetic fields generated by the currents in the positive plate 1 and the negative plate 2 can be offset, no redundant positive plate 1 or negative plate 2 generates an electromagnetic field, and normal operation and accuracy of the precision component sensitive to the electromagnetic field can be prevented from being affected.
Similarly, as shown in fig. 6, when the lithium battery is charged, the currents in the positive plate 1 and the negative plate 2 are also opposite currents, and since the length of the positive plate 1 is equal to the length of the negative plate 2, the electromagnetic fields generated by the currents in the positive plate 1 and the negative plate 2 can be cancelled, so that no redundant electromagnetic field is generated by the positive plate 1 or the negative plate 2, and the normal operation and precision of the precision component sensitive to the electromagnetic field can be prevented from being influenced.
The positive electrode tab 5 and the negative electrode tab 6 are in the same direction or in opposite directions, in the first embodiment, as shown in fig. 7, the positive electrode tab 5 and the negative electrode tab 6 are in the same direction, and in other embodiments, the positive electrode tab 5 and the negative electrode tab 6 may be in opposite directions, that is: the positive electrode tab 5 is arranged above the winding core body 4, and the negative electrode tab 6 is arranged below the winding core body 4; or the positive electrode tab 5 is below the winding core body 4, while the negative electrode tab 6 is above the winding core body 4.
Anodal utmost point ear 5 and negative pole utmost point ear 6 bend perpendicularly to rolling up a core body 4 side step by step to the level extends, anodal utmost point ear 5 and negative pole utmost point ear 6 are in the same height of rolling up a core body 4 side after bending.
Specifically, as shown in fig. 7, the positive electrode tab 5 and the negative electrode tab 6 are both located above the winding core body 4, and the positive electrode tab 5 is bent as follows: firstly, the positive electrode tab 5 is vertically bent towards the side wall of the closest winding core body 4 along the radial direction of the winding core body 4, secondly, the positive electrode tab 5 is vertically bent after reaching the side wall of the winding core body 4 along the radial direction of the winding core body 4, thirdly, the positive electrode tab 5 is vertically bent after being tightly attached to the side wall of the winding core body 4 and extending for a certain distance, and finally, the positive electrode tab 5 is horizontally extended; similarly, the negative electrode tab 6 is bent as follows: firstly, negative pole utmost point ear 6 is bent perpendicularly towards the closest 4 lateral walls of rolling up the core body of rolling up 4 radial directions of core body, secondly, negative pole utmost point ear 6 is bent perpendicularly after reaching 4 lateral walls of rolling up the core body along 4 radial directions of rolling up the core body again, and once more, negative pole utmost point ear 6 is hugged closely and is rolled up 4 lateral walls of core body and extend a section distance and then bend perpendicularly, at last, makes 6 horizontal extensions of negative pole utmost point ear.
The angle between the positive electrode tab 5 and the negative electrode tab 6 is between 0 ° and 180 °, which can be determined according to the actual winding result of the positive electrode tab 5 and the negative electrode tab 6, but is not limited by this embodiment, in the first embodiment, as shown in fig. 7, the angle between the positive electrode tab 5 and the negative electrode tab 6 is 180 °.
The width of the positive plate 1 and the negative plate 2 is set to be 3 to 8mm, and the length is set to be 50 to 1000mm, which can be selected according to actual conditions, but is not limited by the embodiment.
The positive electrode lug 5 is an aluminum-to-nickel electrode lug, the negative electrode lug 6 is a nickel electrode lug, the positive electrode lug 5 is connected with the positive electrode plate 1 through welding or riveting or punching, and the negative electrode lug 6 is connected with the negative electrode plate 2 through welding or riveting or punching.
Roll up core body 4 and can install inside the box hat battery or soft packet of lithium cell inside.
Example two
Referring to fig. 8 to 10, a second embodiment of the present invention provides a soft-package lithium battery for canceling an electromagnetic field, including the electric core for canceling an electromagnetic field in the first embodiment, the core body 4 is wrapped by a second aluminum-plastic film 82 and a third aluminum-plastic film 83, and then is formed by hot-press sealing to form a core main body 7, a sealing edge 10 is formed between the second aluminum-plastic film 82 and the third aluminum-plastic film 83, the positive electrode tab 5 and the negative electrode tab 6 extend out from the inside of the core main body 7, and the external package in the second embodiment is an aluminum-plastic film external package, which effectively reduces the overall weight of the lithium battery.
The positive pole lug 5 and the joint of sealing edge 10 are coated with positive pole lug glue 91, and the joint of negative pole lug 6 and sealing edge 10 is coated with negative pole lug glue 92.
The sealing edge 10 is attached to the battery cell main body 7, and the sealing edge 10 and the battery cell main body 7 are tightly attached to each other, so that the volume of the lithium battery is reduced, and the unit density of the lithium battery is increased.
The included angle between the positive electrode tab 5 and the axis of the cell main body 7 is 0-90 degrees, the included angle between the negative electrode tab 6 and the axis of the cell main body 7 is 0-90 degrees, specifically, as shown in fig. 8 and 9, the included angle between the positive electrode tab 5 and the axis of the cell main body 7 is 90 degrees, the included angle between the negative electrode tab 6 and the axis of the cell main body 7 is 90 degrees, as shown in fig. 10, the included angle between the positive electrode tab 5 and the axis of the cell main body 7 is 0 degree, and the included angle between the negative electrode tab 6 and the axis of the cell main body 7 is 0 degree, so that the positive electrode tab 5 and the negative electrode tab 6 can have larger freedom degree to adapt to smaller precise components, and the application is wider.
EXAMPLE III
An embodiment three of the present invention provides a soft-packed lithium battery for manufacturing the electromagnetic field cancellation described in the embodiment two, including the following steps:
step S1: the method comprises the steps of manufacturing pole pieces and welding pole lugs, cutting rectangular positive pole pieces 1 and rectangular negative pole pieces 2, cutting the length of the positive pole pieces 1 and the length of the negative pole pieces 2 to be equal, as shown in figure 3, vertically welding positive pole lugs 5 in the length direction of the positive pole pieces 1, and as shown in figure 4, vertically welding negative pole lugs 6 in the length direction of the negative pole pieces 2.
Step S2: the winding core body 4 is manufactured by stacking the rectangular first separator 31, the positive electrode sheet 1, the second separator 32, the negative electrode sheet 2 and the third separator 33 in sequence and then winding the stacked separators to manufacture the winding core body 4.
Step S3: the winding core body 4 is fixed, and the surface of the winding core body 4 after winding is coated with a circle of first aluminum-plastic film 81.
Step S4: and bending the electrode lugs, namely, vertically bending the positive electrode lug 5 and the negative electrode lug 6 step by step to the side surface of the roll core body 4 and horizontally extending the positive electrode lug 5 and the negative electrode lug 6, wherein the positive electrode lug 5 and the negative electrode lug 6 are positioned at the same height on the side surface of the roll core body 4 after being bent, as shown in fig. 7.
Step S5: the plastic-aluminum membrane is sealed, will roll up the core body 4 and put into between second plastic-aluminum membrane 82 and the third plastic-aluminum membrane 83 through hot-pressing seal shaping formation electric core main part 7, form sealed limit 10 between second plastic-aluminum membrane 82 and the third plastic-aluminum membrane 83, anodal utmost point ear 5 and negative pole utmost point ear 6 stretch out from the inside of electric core main part 7.
Step S6; annotate liquid, activation and reseal, to the inside electrolyte that injects of core body 4, to core body 4 activation back, reseal package.
Step S7; shaping and folding, trimming the appearance of the battery cell main body 7 through a blanking tool, subtracting redundant aluminum-plastic films, and bending the sealing edge 10 in the axial direction, wherein the sealing edge 10 is closely attached to the surface of the battery cell main body 7.
The manufacturing method is simple to operate, greatly improves the manufacturing efficiency of the lithium battery, and improves the production quality of the lithium battery.
In conclusion, the beneficial effects of the invention are as follows:
according to the invention, the first diaphragm 31, the positive plate 1, the second diaphragm 32, the negative plate 2 and the third diaphragm 33 are stacked and then wound to form the winding core body 4, wherein the length of the positive plate 1 is equal to that of the negative plate 2, when the lithium battery discharges, the currents in the positive plate 1 and the negative plate 2 are mutually reverse currents, and because the length of the positive plate 1 is equal to that of the negative plate 2, the electromagnetic fields generated by the currents of the positive plate 1 and the negative plate 2 during discharging can be mutually offset, no redundant positive plate 1 or negative plate 2 generates an electromagnetic field, and the normal operation and precision of a precision component sensitive to the electromagnetic field can be prevented from being influenced; similarly, when the lithium battery is charged, the currents in the positive plate 1 and the negative plate 2 are also opposite currents, and because the length of the positive plate 1 is equal to that of the negative plate 2, electromagnetic fields generated by the currents in the positive plate 1 and the negative plate 2 can be mutually offset during charging, no redundant electromagnetic field is generated by the positive plate 1 or the negative plate 2, and the normal work and precision of precision components sensitive to the electromagnetic fields can be prevented from being influenced; the invention adopts the mode of stacking and winding to manufacture the roll core body 4, has simple structure and manufacturing method, can effectively improve the energy density of the lithium battery, and is suitable for being assembled on more flexible wearable electronic products.
Claims (10)
1. The utility model provides a counteract electric core of electromagnetic field, its characterized in that, includes core body (4), core body (4) is piled up by rectangular first diaphragm (31), positive plate (1), second diaphragm (32), negative pole piece (2) and third diaphragm (33) and convolutes and form, core body (4) surface cladding round first plastic-aluminum membrane (81), anodal utmost point ear (5) are connected to positive plate (1) one end, anodal utmost point ear (5) are drawn forth perpendicularly from the length direction of positive plate (1), negative pole utmost point ear (6) are connected to negative pole piece (2) one end, the length direction of negative pole piece (2) is drawn forth perpendicularly from negative pole piece (6), the length of positive plate (1) and the length of negative pole piece (2) equal.
2. The electromagnetic field cancelling cell of claim 1, wherein the positive electrode tab (5) and the negative electrode tab (6) are in the same direction or in opposite directions.
3. The electric core for counteracting the electromagnetic field according to claim 1, wherein the positive electrode tab (5) and the negative electrode tab (6) are bent vertically to the side of the winding core body (4) step by step and extend horizontally, and the positive electrode tab (5) and the negative electrode tab (6) are bent and then located at the same height of the side of the winding core body (4).
4. The electromagnetic field canceling cell of claim 1, wherein the angle between the positive tab (5) and the negative tab (6) is between 0 ° and 180 °.
5. The electromagnetic field cancelling cell of claim 1, wherein the positive plate (1) and the negative plate (2) have a width of 3 to 8mm and a length of 50 to 1000 mm.
6. The electric core for counteracting the electromagnetic field according to claim 1, wherein the positive electrode tab (5) is an aluminum-to-nickel electrode tab, the negative electrode tab (6) is a nickel electrode tab, the positive electrode tab (5) is connected with the positive electrode tab (1) through welding, riveting or punching, and the negative electrode tab (6) is connected with the negative electrode tab (2) through welding, riveting or punching.
7. A soft package lithium battery for offsetting electromagnetic field, which comprises the electric core for offsetting electromagnetic field as claimed in any one of claims 1 to 6, wherein the electric core main body (7) is formed by hot press sealing after the winding core body (4) is coated by a second aluminum plastic film (82) and a third aluminum plastic film (83) up and down, a sealing edge (10) is formed between the second aluminum plastic film (82) and the third aluminum plastic film (83), and the positive electrode tab (5) and the negative electrode tab (6) are extended out from the inside of the electric core main body (7).
8. The lithium battery with soft package for counteracting electromagnetic field according to claim 7, characterized in that the junction of the positive electrode tab (5) and the sealing edge (10) is coated with positive electrode tab glue (91), and the junction of the negative electrode tab (6) and the sealing edge (10) is coated with negative electrode tab glue (92).
9. The lithium battery pack for counteracting electromagnetic fields according to claim 7, wherein the sealing edge (10) is attached to the cell main body (7), the included angle between the positive electrode tab (5) and the axis of the cell main body (7) is 0-90 degrees, and the included angle between the negative electrode tab (6) and the axis of the cell main body (7) is 0-90 degrees.
10. A method for manufacturing a lithium battery pack for counteracting electromagnetic fields according to any one of claims 1 to 9, comprising the steps of:
step S1: manufacturing a pole piece and welding a pole lug, cutting a rectangular positive pole piece (1) and a rectangular negative pole piece (2), cutting the length of the positive pole piece (1) and the length of the negative pole piece (2) to be equal, vertically welding a positive pole lug (5) in the length direction of the positive pole piece (1), and vertically welding a negative pole lug (6) in the length direction of the negative pole piece (2);
step S2: manufacturing a winding core body (4), and sequentially stacking a rectangular first diaphragm (31), a rectangular positive plate (1), a rectangular second diaphragm (32), a rectangular negative plate (2) and a rectangular third diaphragm (33) and then winding the stacked rectangular first diaphragm, the rectangular positive plate, the rectangular second diaphragm and the rectangular negative plate to manufacture the winding core body (4);
step S3: fixing the winding core body (4), and coating a circle of first aluminum-plastic film (81) on the surface of the wound winding core body (4);
step S4: the tab bending step by step, namely, a positive tab (5) and a negative tab (6) are vertically bent to the side surface of the winding core body (4) step by step and horizontally extend, and the positive tab (5) and the negative tab (6) are positioned at the same height of the side surface of the winding core body (4) after being bent;
step S5: sealing the aluminum-plastic film, namely placing the winding core body (4) between a second aluminum-plastic film (82) and a third aluminum-plastic film (83) to form a battery core main body (7) through hot-press sealing molding, forming a sealing edge (10) between the second aluminum-plastic film (82) and the third aluminum-plastic film (83), and extending the positive electrode tab (5) and the negative electrode tab (6) from the interior of the battery core main body (7);
step S6; injecting, activating and resealing, injecting electrolyte into the roll core body (4), activating the roll core body (4), and resealing and packaging;
step S7; shaping and folding, trimming the appearance of the battery cell main body (7) through a blanking tool, subtracting redundant aluminum-plastic films, and bending the sealing edge (10) towards the axial direction, wherein the sealing edge (10) is closely attached to the surface of the battery cell main body (7).
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| CN113394465A (en) * | 2021-06-08 | 2021-09-14 | 歌尔智能科技有限公司 | Winding type battery and TWS Bluetooth headset |
| CN113422160A (en) * | 2021-05-13 | 2021-09-21 | 深圳市诚捷智能装备股份有限公司 | Battery core, ear folding device and battery core processing system |
| CN113871768A (en) * | 2021-09-17 | 2021-12-31 | 新余赣锋电子有限公司 | Battery with a battery cell |
| CN114122629A (en) * | 2021-10-29 | 2022-03-01 | 广东微电新能源有限公司 | Method for determining position of battery leading-out terminal |
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2021
- 2021-01-13 CN CN202110040375.0A patent/CN112768625A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113422160A (en) * | 2021-05-13 | 2021-09-21 | 深圳市诚捷智能装备股份有限公司 | Battery core, ear folding device and battery core processing system |
| CN113394465A (en) * | 2021-06-08 | 2021-09-14 | 歌尔智能科技有限公司 | Winding type battery and TWS Bluetooth headset |
| CN113871768A (en) * | 2021-09-17 | 2021-12-31 | 新余赣锋电子有限公司 | Battery with a battery cell |
| CN113871768B (en) * | 2021-09-17 | 2023-04-07 | 新余赣锋电子有限公司 | Battery with a battery cell |
| CN114122629A (en) * | 2021-10-29 | 2022-03-01 | 广东微电新能源有限公司 | Method for determining position of battery leading-out terminal |
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