CN114927768A - Battery, electronic product and electric vehicle - Google Patents

Battery, electronic product and electric vehicle Download PDF

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Publication number
CN114927768A
CN114927768A CN202210604144.2A CN202210604144A CN114927768A CN 114927768 A CN114927768 A CN 114927768A CN 202210604144 A CN202210604144 A CN 202210604144A CN 114927768 A CN114927768 A CN 114927768A
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CN
China
Prior art keywords
pole piece
battery
roll core
pole
segment
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Pending
Application number
CN202210604144.2A
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Chinese (zh)
Inventor
殷玉森
张蒙
陈宇
侯敏
曹辉
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Shanghai Ruipu Energy Co Ltd
Rept Battero Energy Co Ltd
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Shanghai Ruipu Energy Co Ltd
Rept Battero Energy Co Ltd
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Application filed by Shanghai Ruipu Energy Co Ltd, Rept Battero Energy Co Ltd filed Critical Shanghai Ruipu Energy Co Ltd
Priority to CN202210604144.2A priority Critical patent/CN114927768A/en
Publication of CN114927768A publication Critical patent/CN114927768A/en
Pending legal-status Critical Current

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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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)

Abstract

The invention provides a battery, an electronic product and an electric vehicle, wherein the battery comprises at least one battery roll core, the battery roll core comprises a first pole piece and a second pole piece which are wound, the electric polarities of the first pole piece and the second pole piece are opposite, the innermost ring of the battery roll core comprises a first half ring and a second half ring which are opposite, the first pole piece of the first half ring exceeds the second pole piece to form a first inner pole segment, and the first inner pole segment and the second pole piece of the opposite second half ring form an inner pole piece positive-negative pair. The invention can effectively improve the space utilization rate of the battery, improve the utilization efficiency of the electrode material, reduce the usage amount of the isolation membrane and further improve the energy density of the battery. The invention is suitable for various chemical energy storage systems and has wide application prospect.

Description

Battery, electronic product and electric vehicle
Technical Field
The invention belongs to the field of battery design and application, and particularly relates to a battery, an electronic product and an electric vehicle.
Background
With the development of science and technology, more and more electronic products and new energy products enter people's lives, and generally, the electronic products and the new energy products are driven by batteries. Among them, the wound battery is widely used in electronic products in various fields because of its advantages such as long service life and high energy density. The existing battery comprises the following components: the separator comprises a positive electrode plate, a negative electrode plate and an isolating membrane positioned between the positive electrode plate and the negative electrode plate, wherein the isolating membrane is used for isolating the positive electrode plate from the negative electrode plate, so that the positive electrode plate is prevented from being in contact with the negative electrode plate to cause short circuit. In the manufacture of a winding type battery, after a positive electrode sheet, a separation film and a negative electrode sheet are stacked together, a winding core is formed by winding from the head to the tail of the negative electrode sheet with the head of the negative electrode sheet as the center.
However, the energy density of the existing chemical system is close to the theoretical limit, and the existing system needs to be further expanded and improved before the mature and reliable next-generation chemical system with higher energy density appears.
Meanwhile, in the current chemical energy storage batteries in various forms, two winding cores and more than two cores are generally combined into a battery single body, and at least one circle of negative electrode film surface is arranged outside each single core and does not participate in chemical energy storage contribution. The material cost is increased, and the effective group margin space, the material utilization rate and the energy density of the battery are reduced.
It should be noted that the above background description is provided only for the sake of clarity and complete description of the technical solutions of the present application, and for the sake of understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present application.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a battery, an electronic product and an electric vehicle, which are used to solve the problem that the energy density of the battery in the prior art is difficult to be further improved.
In order to achieve the above and other related objects, the present invention provides a battery, which includes at least one battery roll core, the battery roll core includes a first electrode sheet and a second electrode sheet wound, the first electrode sheet and the second electrode sheet have opposite electric polarities, the innermost circle of the battery roll core includes a first half-circle and a second half-circle opposite to each other, the first electrode sheet of the first half-circle exceeds the second electrode sheet to form a first inner electrode segment, and the first inner electrode segment and the second electrode sheet of the second half-circle opposite to each other form an inner positive and negative electrode sheet pair.
Optionally, the length of the first inner pole segment ranges from 0.1mm to the width of the innermost circle of the battery winding core.
Optionally, a separator is disposed between the first and second pole pieces to form the battery roll core in the form of first pole piece-separator-second pole piece.
Optionally, the isolation film comprises a substrate and a coating layer, the substrate comprises one or more of a polyethylene single-layer film, a polypropylene single-layer film and a polypropylene-polyethylene-polypropylene three-layer composite film, and the coating layer comprises one or more of porous silicon dioxide, porous aluminum oxide, porous titanium dioxide and porous zirconium dioxide.
Optionally, the first electrode sheet is one of a positive electrode sheet and a negative electrode sheet, the second electrode sheet is the other of the positive electrode sheet and the negative electrode sheet, the positive electrode sheet includes a positive electrode coating and a positive electrode current collector, the positive electrode current collector includes one or more of an aluminum foil and a carbon-coated aluminum foil, an active substance in the positive electrode coating includes one or more of lithium cobalt oxide, lithium iron phosphate, lithium manganate, ternary materials lithium nickel cobalt manganese oxide and lithium nickel cobalt aluminate, the negative electrode sheet includes a negative electrode coating and a negative electrode current collector, the negative electrode sheet includes a copper foil, and the active substance in the negative electrode coating includes one or more of graphite, hard carbon, silicon and silicon monoxide.
Optionally, the battery includes a first battery roll core and a second battery roll core which are adjacently arranged, wherein the first pole piece of the outermost ring of the first battery roll core exceeds the second pole piece to form a first outer pole segment, the outermost ring of the second battery roll core is the second pole piece, and the first outer pole segment of the first battery roll core is opposite to the second pole piece of the second battery roll core.
Optionally, the length of the first outer pole segment of the outermost turn of the first battery winding core ranges from 0.1mm to the circumference of the outermost turn of the winding core.
The invention also provides a battery, which comprises a first battery roll core and a second battery roll core which are adjacently arranged, wherein a first pole piece of the outermost ring of the first battery roll core exceeds a second pole piece to form a first external pole segment, the outermost ring of the second battery roll core is a second pole piece, and the first external pole segment of the first battery roll core and the second pole piece of the opposite second battery roll core form an external positive pole piece and an external negative pole piece pair.
Optionally, the length of the first outer pole segment of the outermost circle of the first battery winding core ranges from 0.1mm to the circumference of the outermost circle of the winding core.
Optionally, a separation film is disposed between the first pole piece and the second pole piece to form the battery roll core in the form of first pole piece-separation film-second pole piece.
Optionally, the isolation film comprises a substrate and a coating layer, the substrate comprises one or more of a polyethylene single-layer film, a polypropylene single-layer film and a polypropylene-polyethylene-polypropylene three-layer composite film, and the coating layer comprises one or more of porous silicon dioxide, porous aluminum oxide, porous titanium dioxide and porous zirconium dioxide.
Optionally, the first electrode sheet is one of a positive electrode sheet and a negative electrode sheet, the second electrode sheet is the other of the positive electrode sheet and the negative electrode sheet, the positive electrode sheet includes a positive electrode coating and a positive electrode current collector, the positive electrode current collector includes one or a combination of two of aluminum foil and carbon-coated aluminum foil, an active substance in the positive electrode coating includes one or a combination of more than one of lithium cobaltate, lithium iron phosphate, lithium manganate, ternary materials lithium nickel cobalt manganese, and lithium nickel cobalt aluminate, the negative electrode sheet includes a negative electrode coating and a negative electrode current collector, the negative electrode current collector includes a copper foil, and the active substance in the negative electrode coating includes one or a combination of more than one of graphite, hard carbon, silicon, and silicon monoxide.
The invention also provides an electronic product which comprises the battery in any one of the aspects.
Optionally, the electronic product includes one of a mobile phone, a laptop, a tablet computer, a mobile phone charger, an unmanned aerial vehicle, a smart robot, and a wearable electronic device.
The invention also provides an electric vehicle, which comprises a motor and a power battery for supplying power to the motor, wherein the power battery comprises the battery in any scheme.
Optionally, the electric vehicle comprises one of a new energy automobile and an electric bicycle.
As described above, the battery, the electronic product, and the electric vehicle according to the present invention have the following advantageous effects:
the invention provides a battery, which comprises at least one battery roll core, wherein the battery roll core comprises a first pole piece and a second pole piece which are wound, the electric polarities of the first pole piece and the second pole piece are opposite, the innermost circle of the battery roll core comprises a first half circle and a second half circle which are opposite, the first pole piece of the first half circle exceeds the second pole piece to form a first internal pole segment, and the first internal pole segment and the second pole piece of the second half circle which is opposite form an internal positive pole piece and a negative pole piece pair. The invention also provides another battery, which comprises a first battery roll core and a second battery roll core which are adjacently arranged, wherein a first pole piece of the outermost ring of the first battery roll core exceeds a second pole piece to form a first external pole segment, the outermost ring of the second battery roll core is a second pole piece, and the first external pole segment of the first battery roll core and the second pole piece of the opposite second battery roll core form an external positive pole piece and an external negative pole piece pair. The invention can effectively improve the space utilization rate of the battery, improve the utilization efficiency of the electrode material, reduce the usage amount of the isolating membrane and further improve the energy density of the battery. The invention is suitable for various chemical energy storage systems and has wide application prospect.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is to be understood that the drawings in the following description are of some embodiments of the application only.
Fig. 1 is a schematic diagram of a battery roll core of a battery in embodiment 1 of the invention.
Fig. 2 is a schematic view showing another battery roll core of the battery in example 1 of the present invention.
Fig. 3 is a schematic diagram of a battery roll core of a battery in embodiment 2 of the invention.
Fig. 4 is a schematic diagram showing another battery roll core of the battery in example 2 of the present invention.
Description of the element reference numerals
1 first battery roll core
11 negative plate
111 negative electrode current collector
112 negative electrode coating
114 outermost negative pole piece
133 innermost negative electrode sheet
12 positive plate
121 positive electrode current collector
122 positive electrode coating
123 positive internal pole segment
13 isolating film
2 second battery winding core
224 positive outer pole piece section
3 first battery roll core
333 outermost ring negative plate
4 second battery roll core
423 positive pole segment
A1 first external positive and negative pole piece pair
A2 second external positive and negative pole piece pair
A3 third external positive and negative pole piece pair
Detailed Description
The following embodiments of the present invention are provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.
Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
As in the detailed description of the embodiments of the present invention, the cross-sectional views illustrating the device structure are not partially enlarged in general scale for convenience of illustration, and the schematic views are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Spatially relative terms, such as "under," "below," "lower," "below," "over," "upper," and the like, may be used herein for convenience in describing the relationship of one element or feature to another element or feature illustrated in the figures. It will be understood that these terms of spatial relationship are intended to encompass other orientations of the device in use or operation in addition to the orientation depicted in the figures. Further, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present.
In the context of this application, a structure described as having a first feature "on" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed in between the first and second features, such that the first and second features may not be in direct contact.
It should be noted that the drawings provided in the present embodiment are only for schematically illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than being drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of each component in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
Example 1
As shown in fig. 1, the present embodiment provides a battery, which includes at least one battery roll core, where the battery roll core includes a first wound pole piece and a second wound pole piece, the first pole piece and the second pole piece have opposite electric polarities, the innermost circle of the battery roll core includes a first half circle and a second half circle which are opposite to each other, the first pole piece of the first half circle exceeds the second pole piece to form a first inner pole segment which is not covered by the second pole piece, and the first inner pole segment and the second pole piece of the second half circle which is opposite to each other form an inner positive and negative pole piece pair.
In one embodiment, the first pole piece is a positive pole piece 12, the second pole piece is a negative pole piece 11, the battery winding core includes the wound positive pole piece 12 and negative pole piece 11, the innermost ring of the battery winding core includes a first half-ring and a second half-ring which are opposite, the positive pole piece 12 of the first half-ring exceeds the negative pole piece 11 to form a naked positive internal pole segment 123, and the positive internal pole segment 123 and the opposite second half-ring form an internal positive pole piece pair with the second pole piece 133.
In one embodiment, the battery may be various types of chemical energy storage batteries, in this example the battery may be a lithium ion battery, for example.
In one embodiment, a separation film 13 is disposed between the first pole piece and the second pole piece to form the battery roll core in the form of the first pole piece-separation film 13-second pole piece, the separation film 13 is used to separate the first pole piece and the second pole piece to avoid short circuit caused by contact between the first pole piece and the second pole piece, and in this embodiment, the separation film 13 also covers the surface of the first inner pole piece. For example, the separator 13 includes a substrate including one or a combination of more than one of a polyethylene single-layer film, a polypropylene single-layer film, and a polypropylene-polyethylene-polypropylene three-layer composite film, and a coating layer including one or a combination of more than one of porous silica, porous alumina, porous titania, and porous zirconia.
In one embodiment, the first electrode sheet is one of a positive electrode sheet and a negative electrode sheet, the second electrode sheet is the other of the positive electrode sheet and the negative electrode sheet, the negative electrode sheet 11 includes a negative electrode coating 112 and a negative electrode current collector 111, the negative electrode current collector 111 includes a copper foil, the active material in the negative electrode coating 112 includes one or more combinations of graphite, hard carbon, silicon and silicon monoxide, the positive electrode sheet 12 includes a positive electrode coating 122 and a positive electrode current collector 121, the positive electrode current collector 121 includes one or more combinations of aluminum foil and carbon-coated aluminum foil, and the active material in the positive electrode coating 122 includes one or more combinations of lithium cobaltate, lithium iron phosphate, lithium manganate, ternary materials lithium nickel cobalt manganate and lithium nickel cobalt aluminate.
In one embodiment, the first inner pole segment has a length ranging from 0.1mm to a width of an innermost turn of the battery jelly roll. For example, the length of the first inner pole segment is preferably the width of the innermost circle of the battery winding core, so as to maximally improve the effective length of the positive and negative pole piece pairs. In this embodiment, the polarity of the first internal pole segment is positive, that is, the first pole piece is a positive pole piece, when the negative pole piece 11, the separation film 13 and the positive pole piece 12 are stacked in the manufacturing process of the battery winding core, the positive pole piece can be exposed according to the length of the positive pole piece to be exposed, and then the negative pole piece, the separation film 13 and the positive pole piece are wound into the battery winding core through a winding process.
In one embodiment, the battery roll core further includes an electrolyte, for example, a lithium ion battery, when the battery is charged, lithium ions in the positive electrode coating 122 enter the electrolyte under the action of an electric field force, pass through the separator 13, migrate to the surface of the negative electrode coating 112 through electrolysis, and then are embedded in the negative electrode coating 112, and at the same time, electrons flow to the negative electrode coating 112 through an external circuit, so that charges in the negative electrode coating 112 reach an equilibrium state. When the battery is discharged, lithium ions are extracted from the negative electrode coating 112, enter the electrolyte, pass through the separation film 13, migrate to the surface of the positive electrode coating 122 through the electrolyte, and then are inserted into the positive electrode coating 122. Meanwhile, electrons flow to the positive electrode coating 122 through an external circuit, so that the charge of the positive electrode coating 122 reaches an equilibrium state. Further, in the embodiment, the first inner pole segment and the second pole piece of the second half circle opposite to the first inner pole segment form an inner positive and negative pole piece pair, so that in the charging and discharging process, the inner positive and negative pole pair formed by the first inner pole segment and the second pole piece of the second half circle opposite to the first inner pole segment also participates in charging and discharging, and the energy density of the battery is effectively improved.
In a further embodiment, as shown in fig. 2, the battery includes two battery winding cores, namely a first battery winding core 1 and a second battery winding core 2, wherein the outermost first pole piece of the second battery winding core 2 extends beyond the second pole piece to form a first outer pole segment uncovered by the second pole piece, the surface of the first outer pole segment may also be covered by the isolation film 13, the first outer pole segment is, for example, a positive outer pole segment 224, the outermost first battery winding core 1 is a second pole piece, for example, a negative pole piece 114, and the first outer pole segment (positive outer pole segment 224) of the second battery winding core 2 and the second pole piece (negative pole piece 114) of the first battery winding core are opposite to form an outer pole piece pair.
In one embodiment, the first outer pole segment of the outermost turn of the first battery roll core has a length in a range from 0.1mm to the circumference of the outermost turn of the roll core. For example, the length of the first outer pole segment is preferably the width of the innermost circle of the battery winding core, so as to maximally improve the effective length of the positive and negative pole piece pairs.
The first external pole segment of the first battery roll core is opposite to the second pole piece of the second battery roll core, so that an external positive pole piece pair and an external negative pole piece pair are formed, the first external pole segment of the first battery roll core is opposite to the external positive pole piece pair formed by the second pole piece of the second battery roll core and participate in charging and discharging in the charging and discharging process, and therefore the energy density of the battery is effectively improved.
Example 2
As shown in fig. 3, the present embodiment provides a battery, which includes a first battery roll core and a second battery roll core that are arranged adjacently, where a first pole piece of an outermost ring of the first battery roll core exceeds a second pole piece to form a first outer pole segment that is not covered by the second pole piece, the outermost ring of the second battery roll core is a second pole piece, and the first outer pole segment of the first battery roll core and the second pole piece of the opposite second battery roll core form an outer positive and negative pole piece pair.
In one embodiment, as shown in fig. 3, the first pole piece is the positive pole piece 12, the second pole piece is the negative pole piece 11, and the battery roll core comprises the wound positive pole piece 12 and negative pole piece 11. The battery comprises a first battery roll core 3 and a second battery roll core 4 which are adjacently arranged, wherein the outermost positive plate of the second battery roll core 4 exceeds the negative plate to form a naked positive and external pole segment 423, the outermost positive plate of the first battery roll core 3 is the negative plate 333, and the positive and external pole segment 423 of the second battery roll core 4 and the opposite negative plate 333 of the first battery roll core 3 form an external positive and negative pole piece pair.
In one embodiment, the battery may be various types of chemical energy storage batteries, in this example the battery may be a lithium ion battery, for example.
In one embodiment, a separation film 13 is disposed between the first pole piece and the second pole piece to form the battery roll core in the form of the first pole piece-separation film 13-second pole piece, the separation film 13 is used to separate the first pole piece and the second pole piece to avoid short circuit caused by contact between the first pole piece and the second pole piece, and in this embodiment, the separation film 13 may also cover the surface of the first outer pole piece. For example, the separation film 13 includes a substrate including one or more combinations of a polyethylene single-layer film, a polypropylene single-layer film, and a polypropylene-polyethylene-polypropylene three-layer composite film, and a coating layer including one or more combinations of porous silica, porous alumina, porous titania, and porous zirconia.
In one embodiment, the first electrode sheet is one of a positive electrode sheet and a negative electrode sheet, the second electrode sheet is the other of the positive electrode sheet and the negative electrode sheet, the negative electrode sheet 11 includes a negative electrode coating 112 and a negative electrode current collector 111, the negative electrode current collector 111 includes a copper foil, the active material in the negative electrode coating 112 includes one or more combinations of graphite, hard carbon, silicon and silicon monoxide, the positive electrode sheet 12 includes a positive electrode coating 122 and a positive electrode current collector 121, the positive electrode current collector 121 includes one or more combinations of aluminum foil and carbon-coated aluminum foil, and the active material in the positive electrode coating 122 includes one or more combinations of lithium cobaltate, lithium iron phosphate, lithium manganate, ternary material lithium nickel cobalt manganese and lithium nickel cobalt aluminate.
In one embodiment, the first outer pole segment of the outermost turn of the first battery roll core has a length in a range from 0.1mm to the circumference of the outermost turn of the roll core. For example, the length of the first outer pole segment is preferably the width of the innermost circle of the battery winding core, so as to maximally improve the effective length of the positive and negative pole piece pairs.
In one embodiment, the battery roll core further includes an electrolyte, for example, a lithium ion battery, when the battery is charged, lithium ions in the positive electrode coating 122 enter the electrolyte under the action of an electric field force, pass through the separator 13, and then migrate to the surface of the negative electrode coating 112 through electrolysis, and then are embedded in the negative electrode coating 112, and at the same time, electrons flow to the negative electrode coating 112 through an external circuit, so that charges in the negative electrode coating 112 reach an equilibrium state. When the battery is discharged, lithium ions are extracted from the negative electrode coating 112, enter the electrolyte, pass through the separation film 13, migrate to the surface of the positive electrode coating 122 through the electrolyte, and are then embedded in the positive electrode coating 122. Meanwhile, electrons flow to the positive electrode coating 122 through an external circuit, so that the charge of the positive electrode coating 122 reaches an equilibrium state. Furthermore, the first external pole segment of the first battery roll core of the embodiment is opposite to the second pole piece of the second battery roll core to form an external positive pole piece pair and an external negative pole piece pair, so that in the charging and discharging process, the first external pole segment of the first battery roll core is opposite to the external positive pole pair formed by the second pole piece of the second battery roll core and also participates in charging and discharging, and the energy density of the battery is effectively improved.
Based on the principle of the battery of this embodiment, can increase more battery rolls core, every the first half circle of the outermost circle of battery roll core is revealed first outer pole piece section (like anodal section), and the second half circle then reveals the second pole piece (like the negative pole piece), and adjacent two liang of battery roll cores all constitute one outer positive and negative pole piece pair, as shown in fig. 4, the battery contains 4 battery roll cores, and adjacent two liang of battery roll cores in 4 battery roll cores constitute first outer positive and negative pole piece pair A1, the outer positive and negative pole piece pair A2 of second and the outer positive and negative pole piece pair A3 of third.
Example 3
The present embodiment provides an electronic product including the battery according to embodiment 1 or embodiment 2.
In one embodiment, the electronic product includes one of a mobile phone, a laptop, a tablet computer, a mobile phone, an unmanned aerial vehicle, a smart robot, and a wearable electronic device (e.g., a smart band, etc.). Of course, other electronic products equipped with the battery according to embodiment 1 or embodiment 2 should also be covered by the scope of the present invention, and are not limited to the examples listed here.
Example 4
The present embodiment provides an electric vehicle including a motor and a power battery for supplying power to the motor, where the power battery includes the battery according to embodiment 1 or embodiment 2.
In one embodiment, the electric vehicle comprises one of a new energy automobile and an electric bicycle. Of course, other electric vehicles equipped with the battery according to embodiment 1 or embodiment 2 should also be covered by the scope of the present invention, and are not limited to the examples listed here.
As described above, the battery, the electronic product, and the electric vehicle according to the present invention have the following advantageous effects:
the invention provides a battery, which comprises at least one battery roll core, wherein the battery roll core comprises a first pole piece and a second pole piece which are wound, the electric polarities of the first pole piece and the second pole piece are opposite, the innermost circle of the battery roll core comprises a first half circle and a second half circle which are opposite, the first pole piece of the first half circle exceeds the second pole piece to form a first internal pole segment, and the first internal pole segment and the second pole piece of the second half circle which is opposite form an internal positive pole piece and a negative pole piece pair. The invention also provides another battery, which comprises a first battery roll core and a second battery roll core which are adjacently arranged, wherein a first pole piece of the outermost ring of the first battery roll core exceeds a second pole piece to form a first external pole segment, the outermost ring of the second battery roll core is a second pole piece, and the first external pole segment of the first battery roll core and the second pole piece of the opposite second battery roll core form an external positive pole piece and an external negative pole piece pair. The invention can effectively improve the space utilization rate of the battery, improve the utilization efficiency of the electrode material, reduce the usage amount of the isolating membrane and further improve the energy density of the battery. The invention is suitable for various chemical energy storage systems and has wide application prospect.
Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. The utility model provides a battery, its characterized in that, the battery includes that at least one battery rolls up the core, the battery rolls up the core and contains the first pole piece and the second pole piece of coiling, the electric polarity of first pole piece and second pole piece is opposite, the innermost circle that the core was rolled up to the battery includes relative first half-turn and second half-turn, the first pole piece of first half-turn surpasss the second pole piece in order to form a first interior pole piece, first interior pole piece with relative the second half-turn positive and negative pole piece is right in the second pole piece is constituteed.
2. The battery of claim 1, wherein: the length range of the first inner pole segment is 0.1mm to the width of the innermost ring of the battery roll core.
3. The battery of claim 1, wherein: an isolation film is arranged between the first pole piece and the second pole piece to form the battery winding core in the form of a first pole piece, the isolation film and the second pole piece; the isolating membrane comprises a base material and a coating layer, the base material comprises one of a polyethylene single-layer membrane, a polypropylene single-layer membrane and a polypropylene-polyethylene-polypropylene three-layer composite membrane, and the coating layer comprises one or more of porous silicon dioxide, porous aluminum oxide, porous titanium dioxide and porous zirconium dioxide; the first pole piece is one of them kind of positive plate and negative pole piece, the second pole piece is the other kind of positive plate and negative pole piece, the positive plate includes anodal coating and anodal mass flow body, anodal mass flow body includes in aluminium foil, the carbon-coated aluminium foil one or more than one kind combination, active material in the anodal coating includes lithium cobaltate, lithium iron phosphate, lithium manganate, ternary material nickel cobalt lithium manganate and the combination in the lithium nickel cobalt aluminate one or more than two kinds, the negative pole piece includes negative coating and negative pole mass flow body, the negative pole mass flow body includes the copper foil, active material in the negative pole coating includes one or more than one kind combination in graphite, hard carbon, silicon and the inferior silicon oxide.
4. The battery of claim 1, wherein: the battery comprises a first battery roll core and a second battery roll core which are arranged adjacently, wherein the first pole piece of the outermost ring of the first battery roll core exceeds the second pole piece to form a first outer pole segment, the outermost ring of the second battery roll core is the second pole piece, and the first outer pole segment of the first battery roll core is opposite to the first outer pole segment of the second battery roll core.
5. The battery of claim 4, wherein: the length range of the first outer pole segment of the outermost ring of the first battery roll core is 0.1 mm-the circumference of the outermost ring of the roll core.
6. A battery, characterized by: the battery comprises a first battery roll core and a second battery roll core which are arranged adjacently, wherein the first pole piece of the outermost ring of the first battery roll core exceeds the second pole piece to form a first outer pole segment, the outermost ring of the second battery roll core is the second pole piece, and the first outer pole segment of the first battery roll core is opposite to the first outer pole segment of the second battery roll core.
7. The battery of claim 6, wherein: the length range of the first outer pole segment of the outermost ring of the first battery roll core is 0.1 mm-the circumference of the outermost ring of the roll core.
8. The battery of claim 6, wherein: an isolation film is arranged between the first pole piece and the second pole piece so as to form the battery winding core in the form of the first pole piece, the isolation film and the second pole piece; the isolating membrane comprises a base material and a coating layer, the base material comprises one of a polyethylene single-layer membrane, a polypropylene single-layer membrane and a polypropylene-polyethylene-polypropylene three-layer composite membrane, and the coating layer comprises one or more of porous silicon dioxide, porous aluminum oxide, porous titanium dioxide and porous zirconium dioxide; the first pole piece is one of them kind of positive plate and negative pole piece, the second pole piece is the other kind of positive plate and negative pole piece, the positive plate includes anodal coating and anodal mass flow body, anodal mass flow body includes in aluminium foil, the carbon-coated aluminium foil one kind or more than one kind combination, active material in the anodal coating includes lithium cobaltate, lithium iron phosphate, lithium manganate, ternary material nickel cobalt lithium manganate and nickel cobalt lithium aluminate one kind or more than one kind combination, the negative pole piece includes negative pole coating and negative pole mass flow body, the negative pole mass flow body includes the copper foil, active material in the negative pole coating includes one kind or more than one kind combination in graphite, hard carbon, silicon and the inferior silicon oxide.
9. An electronic product, characterized in that the electronic product comprises a battery according to any one of claims 1 to 8.
10. An electric vehicle comprising an electric motor and a power cell for powering the electric motor, the power cell comprising a cell according to any one of claims 1 to 8.
CN202210604144.2A 2022-05-30 2022-05-30 Battery, electronic product and electric vehicle Pending CN114927768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210604144.2A CN114927768A (en) 2022-05-30 2022-05-30 Battery, electronic product and electric vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210604144.2A CN114927768A (en) 2022-05-30 2022-05-30 Battery, electronic product and electric vehicle

Publications (1)

Publication Number Publication Date
CN114927768A true CN114927768A (en) 2022-08-19

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Family Applications (1)

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CN202210604144.2A Pending CN114927768A (en) 2022-05-30 2022-05-30 Battery, electronic product and electric vehicle

Country Status (1)

Country Link
CN (1) CN114927768A (en)

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