CN112615039B - Battery cell structure, battery and electronic equipment - Google Patents
Battery cell structure, battery and electronic equipment Download PDFInfo
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- CN112615039B CN112615039B CN202011643658.6A CN202011643658A CN112615039B CN 112615039 B CN112615039 B CN 112615039B CN 202011643658 A CN202011643658 A CN 202011643658A CN 112615039 B CN112615039 B CN 112615039B
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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
- H01M10/0431—Cells with wound or folded 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
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention relates to a battery cell structure, a battery and electronic equipment. The battery cell structure comprises a first winding core, a second winding core and at least one tab structure; the first winding core comprises a first positive plate, a first negative plate and a first diaphragm, wherein the first positive plate and the first negative plate are formed in a winding mode, and the first diaphragm is located between the first positive plate and the first negative plate; the second winding core comprises a second positive plate, a second negative plate and a second diaphragm, wherein the second positive plate and the second negative plate are formed by winding, and the second diaphragm is positioned between the second positive plate and the second negative plate; the tab structure comprises a positive tab and a negative tab; the first roll core and the second roll core have a first state with opposite winding directions and a second state with the same winding directions, and under the second state, the first roll core and one of the second roll cores is provided with the tab structure at the winding tail end, and the first roll core and the other of the second roll cores are provided with the tab structure at the winding head end. The invention can be used for reducing the magnetic field noise floor.
Description
Technical Field
The invention belongs to the technical field of electronic products, and particularly relates to a battery cell structure, a battery and electronic equipment.
Background
In recent years, with the rapid development of electronic technology, various types of electronic devices have emerged. Background noise is a common problem of current electronic equipment, especially on 3C digital earphones. Background noise, or background noise, generally refers to the total noise in an acoustic system, excluding a useful signal. Background noise is disadvantageous for use in electronic devices, and it is therefore necessary to reduce the background noise of electronic devices.
In achieving the reduction of the background noise, the inventors found that the cause of the background noise is many, and most of the background noise originates from the battery. The current flows in the battery, so that the background noise phenomenon is inevitably generated. For the existing battery structure, most of core components, namely a winding core, are negative plate-wrapped positive plates, and then the winding core is formed by winding. In the conventional structure, the negative electrode sheet and the positive electrode sheet are wound in one direction all the time. When the magnetic induction coil is used, the positive pole piece and the negative pole piece are both provided with currents, and the structure that the positive pole piece and the negative pole piece are wound along the same direction can generate an obvious magnetic induction coil, so that a bottom noise phenomenon can be generated.
In the related art, in order to solve the problem of the background noise generated by the battery, a structure for reducing the background noise is generally designed on the periphery of the battery, but the structure for eliminating the background noise needs to be designed according to different specifications of batteries, so that the universality is not strong. This not only causes trouble in the manufacturing process of the battery, but also increases the volume of the battery, which is disadvantageous for the assembly of the battery in the miniature electronic device.
Disclosure of Invention
The invention aims to provide a novel technical scheme of a battery cell structure, a battery and electronic equipment, which can well reduce the magnetic field noise.
According to a first aspect of the present invention, a cell structure is provided. The cell structure includes:
the first winding core comprises a first positive plate, a first negative plate and a first diaphragm, wherein the first positive plate and the first negative plate are formed in a winding mode, and the first diaphragm is positioned between the first positive plate and the first negative plate;
the second winding core comprises a second positive plate, a second negative plate and a second diaphragm, wherein the second positive plate and the second negative plate are formed in a winding mode, and the second diaphragm is located between the second positive plate and the second negative plate; and the number of the first and second groups,
at least one tab structure comprising a positive tab and a negative tab;
the first winding core and the second winding core have a first state in which the winding directions are opposite to each other and a second state in which the winding directions are the same,
in the second state, one of the first winding core and the second winding core is provided with the tab structure at the winding tail end, and the other of the first winding core and the second winding core is provided with the tab structure at the winding head end.
Optionally, in the first state, one of the first core and the second core is wound in a clockwise direction and the other of the first core and the second core is wound in a counterclockwise direction;
under the second state, the first roll core and the second roll core are wound in the clockwise direction, or the first roll core and the second roll core are wound in the anticlockwise direction.
Optionally, an accommodating cavity for accommodating the first winding core is formed in the middle of the second winding core, and the first winding core is arranged in the accommodating cavity, so that the first winding core and the second winding core are sleeved and arranged.
Optionally, in the first state, a winding end of the first positive plate of the first winding core is integrally connected with a winding head end of the second positive plate of the second winding core, a winding end of the first negative plate of the first winding core is integrally connected with a winding head end of the second negative plate of the second winding core, and a winding end of the second negative plate exceeds an end position of the winding end of the second positive plate;
the tab structure is arranged at the winding tail end of the second winding core.
Optionally, the positive tab of the tab structure is arranged at the winding tail end of the second positive plate,
and the negative electrode tab of the tab structure is arranged at the winding tail end of the second negative electrode sheet.
Optionally, a space is provided between the first winding core and the second winding core;
in the first state, the first winding core and the second winding core are both provided with the lug structure at the winding tail end;
in the second state, the first winding core is provided with the lug structure at the inner side of the winding tail end, and the second winding core is provided with the lug structure at the outer side of the winding head end.
Optionally, in the first state, the first winding core and the second winding core are stacked,
the utmost point ear structure sets up to two, one the utmost point ear structure set up in the first winding end of rolling up the core, another the utmost point ear structure set up in the second winding end of rolling up the core.
Optionally, the first winding core is connected in parallel with the second winding core;
the positive tab of the first roll core is electrically connected with the positive tab of the second roll core, and the negative tab of the first roll core is electrically connected with the negative tab of the second roll core.
Optionally, the first winding core is connected in series with the second winding core;
the positive tab of the first winding core is electrically connected with the negative tab of the second winding core; alternatively, the first and second electrodes may be,
the negative electrode lug of the first winding core is electrically connected with the positive electrode lug of the second winding core.
According to a second aspect of the present invention, a battery is provided. The battery includes:
a housing; and
the battery cell of any of the above claims, the battery cell disposed within the casing.
According to a third aspect of the invention, an apparatus is provided. The apparatus comprises:
a battery as described above.
The invention has the technical effects that the winding core forming the cell structure is designed into two parts, namely a first winding core and a second winding core, wherein the first winding core is wound and formed in one direction, and the second winding core can be wound and formed in the other opposite direction; or the winding direction of the second winding core is kept the same as that of the first winding core, and on the basis, the arrangement direction of the lug structure on the first winding core is different from that of the lug structure on the second winding core; the two structural designs are both beneficial to eliminating the magnetic induction coil, and further the magnetic field noise can be reduced and even eliminated. Thereby helping to eliminate the adverse effects of background noise on the electronic device.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is one of schematic structural diagrams of a cell structure provided in an embodiment of the present invention;
fig. 2 is a second schematic structural diagram of a cell structure provided in the embodiment of the present invention;
fig. 3 is a third schematic structural diagram of a cell structure according to an embodiment of the present invention;
fig. 4 is a fourth schematic structural diagram of a cell structure provided in an embodiment of the present invention;
fig. 5 is a fifth schematic structural diagram of a cell structure provided in an embodiment of the present invention;
fig. 6 is a side view of fig. 5.
Description of reference numerals:
1-a first winding core, 11-a first positive plate, 12-a first negative plate, 13-a first diaphragm, 2-a second winding core, 21-a second positive plate, 22-a second negative plate, 23-a second diaphragm, 24-a containing cavity, 3-a tab structure, 31-a positive tab and 32-a negative tab.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
According to one embodiment of the present invention, a cell structure is provided, which may be, for example, a wound cell structure. The cell structure may be designed in various structural forms, as shown in fig. 1 to 5. According to the cell structure provided by the embodiment of the invention, when current passes through the winding core in the cell structure, the bottom noise is not easy to generate, so that the cell structure is very suitable for being applied to various types of batteries. Such as the cells of a lithium ion battery. The battery cell structure provided by the embodiment of the invention has higher use value and popularization value.
As shown in fig. 1 to 5, the battery cell provided in the embodiment of the present invention includes: the core structure comprises a first winding core 1, a second winding core 2 and at least one tab structure 3. That is, in the embodiment of the present invention, the winding core, which is one of the core components constituting the cell structure, is designed to be a two-part structure, namely, the first winding core 1 and the second winding core 2.
The first winding core 1 comprises a first positive electrode sheet 11, a first negative electrode sheet 12 and a first diaphragm 13, wherein the first positive electrode sheet 11 and the first negative electrode sheet 12 are formed in a winding mode. The second winding core 2 comprises a second positive electrode sheet 21, a second negative electrode sheet 22 and a second diaphragm 23 between the second positive electrode sheet 21 and the second negative electrode sheet 22. In the embodiment of the present invention, the first separator 13 is located between the first positive plate 11 and the first negative plate 12, and may be used to separate the first positive plate 11 from the first negative plate 12, so as to avoid the direct contact therebetween, which may cause adverse effects. Similarly, the second separator 23 is located between the second positive electrode tab 21 and the second negative electrode tab 22, and can be used to separate the second positive electrode tab 21 from the second negative electrode tab 22, so as to avoid the direct contact therebetween, which may cause adverse effects.
The battery cell structure further comprises the tab structure 3, and the tab structure 3 can be set to be at least one. The tab structure 3 includes, for example, a positive tab 31 and a negative tab 32.
In the cell structure provided by the embodiment of the invention, the first winding core 1 and the second winding core 2 have a first state in which the winding directions are opposite and a second state in which the winding directions are the same. In the second state, one of the first winding core 1 and the second winding core 2 is provided with the tab structure 3 at the winding tail end, and the other of the first winding core 1 and the second winding core 2 is provided with the tab structure 3 at the winding head end. That is, in the case where the winding directions of the first winding core 1 and the second winding core 2 are the same, the tab structure 3 on the first winding core 1 and the tab structure 3 on the second winding core 2 are drawn out at different positions.
For a conventional winding type battery cell structure, a positive plate, a diaphragm and a negative plate are generally stacked in sequence and then wound to form the battery cell. In the method, except for the design that the negative plate coats the positive plate, and the length of the negative plate is longer than that of the positive plate, the positive plate and the negative plate are generally wound in one direction, so that when current flows through the positive plate and the negative plate, a winding structure formed by the positive plate and the negative plate can generate a magnetic induction coil, and the adverse phenomenon of bottom noise can be caused.
The technical scheme of the embodiment of the invention is different from the traditional winding type battery cell structure.
In the embodiment of the present invention, a winding core constituting a cell structure is designed as a two-part structure, which is respectively marked as a first winding core 1 and a second winding core 2, and the first winding core 1 and the second winding core 2 have two structural designs: one of them is to design the first winding core 1 to be wound in one direction, the second winding core can be wound in the other opposite direction, and the other is to maintain the second winding core 2 to be wound in the same direction as the first winding core 1, on this basis, the directions of the tab structure 3 on the first winding core 1 and the tab structure 3 on the second winding core 2 need to be designed to be different directions. The two structural designs can eliminate the magnetic induction coil when current passes through the first winding core 1 and the second winding core 2, and further can reduce or even eliminate the magnetic field bottom noise. And finally, the adverse effect of the background noise on the electronic equipment is eliminated. Therefore, the technical scheme of the embodiment of the invention overcomes the defects in the prior related art.
The outer surface of the first positive plate 11 of the first winding core 1 is coated with a positive coating, and the outer surface of the first negative plate 12 of the first winding core 1 is coated with a negative coating.
Similarly, the second positive electrode sheet 21 of the second winding core 2 is coated with a positive electrode coating on its outer surface, and the second negative electrode sheet 22 of the second winding core 2 is coated with a negative electrode coating on its outer surface.
The first winding core 1 may have a first positive electrode tab 11 and a first negative electrode tab 12 of different materials. Similarly, the materials of the first positive electrode sheet 21 and the second negative electrode sheet 22 of the second winding core 2 may be different.
Specifically, the first positive plate 11 of the first winding core 1 is an aluminum foil, and the first negative plate 12 of the first winding core 1 is a copper foil.
Specifically, the first positive plate 21 of the second winding core 2 is an aluminum foil, and the second positive plate 22 of the second winding core 2 is a copper foil.
In one example of the present invention, as shown in fig. 1 to 5, the first diaphragm 13 may be designed to include two diaphragm layers, i.e., a first sub-diaphragm layer and a second sub-diaphragm layer. In this way, after the first positive electrode sheet 11 and the first negative electrode sheet 12 are wound, the first sub-separator layer and the second sub-separator layer can well separate the first positive electrode sheet 11 and the first negative electrode sheet 12 to prevent the two from contacting each other after being wound.
In one example of the present invention, as shown in fig. 1 to 5, the second membrane 23 may be designed to include two membrane layers. In the same manner as the first separator 13, the second positive electrode sheet 21 and the second negative electrode sheet 22 may be completely separated from each other after the second positive electrode sheet 21 and the second negative electrode sheet 22 are wound.
Alternatively, the winding end position of the first separator 13 may exceed the winding end positions of the first positive electrode tab 11 and the first negative electrode tab 12, so as to sufficiently separate the first positive electrode tab 11 from the first negative electrode tab 12 and protect the first positive electrode tab 11 from the first negative electrode tab 12.
Likewise, the winding end position of the second separator 23 may exceed the winding end position of the second positive electrode sheet 21 and the second negative electrode sheet 22, so as to sufficiently separate the second positive electrode sheet 21 from the second negative electrode sheet 22 and also protect the second positive electrode sheet 21 from the second negative electrode sheet 22.
The end position of the winding end of the first separator 13 may be flexibly adjusted according to the end positions of the winding ends of the first positive electrode sheet 11 and the first negative electrode sheet 12, and may be adjusted to exceed the end positions of the winding ends of the first positive electrode sheet 11 and the first negative electrode sheet 12. For example, more than half a turn may be possible.
Likewise, the end position of the winding end of the second separator 23 may be flexibly adjusted according to the end positions of the winding ends of the second positive electrode sheet 21 and the second negative electrode sheet 22, as long as the end positions of the winding ends of the second positive electrode sheet 21 and the second negative electrode sheet 22 are exceeded, and may exceed half a turn, for example.
In addition, when the first separator 13 and the second separator 23 each include two separator layers, the end positions of the winding ends of the two separators may be the same or different, and may be flexibly adjusted by a person skilled in the art according to the needs, which is not limited by the present invention.
In addition, the first diaphragm 13 and the second diaphragm 23 are both made of insulating materials.
In the embodiment of the present invention, in the first state, that is, in the case where the winding directions of the first core 1 and the second core 2 are opposite to each other, either one of the first core 1 and the second core 2 can be wound in the clockwise direction, and on that basis, the other one of the first core 1 and the second core 2 can be wound in the counterclockwise direction. So that the winding directions of the first winding core 1 and the second winding core 2 are opposite.
For example, the first winding core 1 includes a first positive electrode sheet 11, a first negative electrode sheet 12, and a first separator 13 located between the first positive electrode sheet 11 and the first negative electrode sheet 12, which are formed by winding in a clockwise direction; the second winding core 2 comprises a second positive electrode sheet 21, a second negative electrode sheet 22 and a second diaphragm 23, wherein the second positive electrode sheet 21 and the second negative electrode sheet 22 are formed by winding in a counterclockwise direction.
For another example, the first winding core 1 includes a first positive electrode sheet 11, a first negative electrode sheet 12, and a first separator 13 located between the first positive electrode sheet 11 and the first negative electrode sheet 12, which are wound and molded in a counterclockwise direction; the second winding core 2 comprises a second positive plate 21, a second negative plate 22 and a second diaphragm 23, wherein the second positive plate 21 and the second negative plate 22 are formed by winding in a clockwise direction.
In the embodiment of the invention, the winding direction is the same in the second state, i.e. in the first winding core 1 and the second winding core 2. For example, the first winding core 1 and the second winding core 2 are wound in a clockwise direction. For another example, both the first winding core 1 and the second winding core 2 are wound in the counterclockwise direction. However, it should be noted that in the second state, the arrangement directions of the tab structure 3 on the first winding core 1 and the tab structure 3 on the second winding core 2 are different, so that the magnetic field induction coil can be eliminated to eliminate the magnetic field noise.
In an example of the present invention, as shown in fig. 1 to fig. 3, the cell structure includes a first winding core 1 and a second winding core 2, a middle portion (in an axial direction) of the second winding core 2 forms an accommodating cavity 24 for accommodating the first winding core 1, the first winding core 1 may be disposed in the accommodating cavity 24, and at this time, the first winding core 1 and the second winding core 2 may form a sleeved arrangement. Under this structural design, can make first book core 1 with second roll core 2 forms a big book core, wherein ingenious utilization the second roll up the interior space of core 2 and accept first book core 1, be favorable to making the electric core structure's that forms wholeness good.
It should be noted that, in the embodiment of the present invention, an accommodating cavity for accommodating the second winding core 2 may be formed in a middle portion (in an axial direction) of the first winding core 1, and the second winding core 2 is disposed in the accommodating cavity of the first winding core 1, at this time, the first winding core 1 and the second winding core 2 may also be in a sleeved arrangement.
In the above sleeving manner, the volumes of the first winding core 1 and the second winding core 2 are different.
In addition, the number of winding turns of the first winding core 1 and the second winding core can be flexibly adjusted by those skilled in the art according to specific needs, which will affect the capacity of the formed battery, and the invention is not limited thereto.
In one example of the present invention, as shown in fig. 1, the first winding core 1 includes a first positive electrode sheet 11, a first negative electrode sheet 12, and a first separator 13 located between the first positive electrode sheet 11 and the first negative electrode sheet 12; the second winding core 2 comprises a second positive electrode sheet 21, a second negative electrode sheet 22 and a second diaphragm 23 positioned between the second positive electrode sheet 21 and the second negative electrode sheet 22; the first winding core 1 and the second winding core 2 have a first state in which winding directions are opposite, and in the first state, a winding tail end of the first positive electrode sheet 11 of the first winding core 1 is integrally connected with a winding head end of the second positive electrode sheet 21 of the second winding core 2, and a winding tail end of the first negative electrode sheet 12 of the first winding core 1 is integrally connected with a winding head end of the second negative electrode sheet 22 of the second winding core 2, wherein the winding tail end of the second negative electrode sheet 22 exceeds an end position of the winding tail end of the second positive electrode sheet 21; the first diaphragm 13 and the second diaphragm 23 are also integrally connected. In this structure, since the first winding core 1 and the second winding core 2 are integrally connected, only one tab structure 3 may be designed. The tab structure 3 includes a positive tab 31 and a negative tab 32. In this example, the tab structure 3 may be provided on the second winding core 2. For example, the tab structure 3 may be provided on one side on the winding end of the second winding core 2. Because the winding tail end of the second winding core 2 faces outwards, the tab structure 3 is led out at a short distance more conveniently, and raw materials cannot be wasted.
Specifically, the tab structure 3 is disposed on the winding end of the second winding core 2, the tab structure 3 includes a positive tab 31 and a negative tab 32, the positive tab 31 may be disposed on the winding end of the second positive plate 21, and the negative tab 32 is disposed on the winding end of the second negative plate 22. The positive electrode tab 31 and the second positive electrode tab 21 may be connected by welding, for example. Similarly, the negative electrode tab 32 and the second negative electrode tab 22 may be connected by welding. The positive electrode tab 31 and the second positive electrode tab 21, and the negative electrode tab 32 and the second negative electrode tab 22 may be integrally formed.
In the above example, the tab structure 3 is not limited to be provided at the winding end of the second winding core 2, and the tab structure 3 may be provided at the winding head end of the second winding core 2. Of course, the tab structure 3 may be disposed at the winding end or the winding head end of the first winding core 1. A person skilled in the art can flexibly adjust the arrangement positions of the tab structure 3 on the first winding core 1 and the second winding core 2 according to specific situations, which is not limited in the present invention.
In one example of the present invention, as shown in fig. 2 and 3, the first winding core 1 includes a first positive electrode sheet 11, a first negative electrode sheet 12, and a first separator 13 located between the first positive electrode sheet 11 and the first negative electrode sheet 12; the second winding core 2 comprises a second positive electrode sheet 21, a second negative electrode sheet 22 and a second diaphragm 23 positioned between the second positive electrode sheet 21 and the second negative electrode sheet 22; first roll core 1 with the second rolls up 2 covers of core and establishes together, just first roll core 1 with the second rolls up and is provided with the interval between the core 2. In this example, the first core 1 and the second core 2 are also nested together, but are spaced apart from each other and are not connected together, unlike the above example.
In an example of the present invention, as shown in fig. 2, the first winding core 1 and the second winding core 2 are sleeved together, a gap is provided between the first winding core 1 and the second winding core 2, and in the first state, the tab structure 3 is provided at a winding end of each of the first winding core 1 and the second winding core 2. The electric core structure that forms under this structural design, first book core 1 wherein and the winding of second book core 2 are opposite in direction, do not have specific requirement to the position that sets up of utmost point ear structure on this basis, and technical staff in the art can set up as required rationally. However, since the first winding core 1 and the second winding core 2 are spaced apart, i.e. independent, it is possible to provide a tab structure 3 on the first winding core 1 and the second winding core 2, respectively.
Specifically, as shown in fig. 2, the first winding core 1 can wind counterclockwise, the second winding core 2 can wind clockwise, at least one tab structure 3 is arranged at the winding end of the first winding core 1, and at least one tab structure 3 is also arranged at the winding end of the second winding core 2. The arrangement position of the tab structure 3 is more convenient for leading out the positive and negative tabs.
In an example of the present invention, as shown in fig. 3, the first winding core 1 and the second winding core 2 are fitted together, a gap is provided between the first winding core 1 and the second winding core 2, and in the second state, the first winding core 1 is provided with a tab structure 3 on the inner side of the winding end, and the second winding core 2 is provided with another tab structure 3 on the outer side of the winding head. The electric core structure that forms under this structural design, first roll up core 1 with the second rolls up the winding direction of core 2 the same, but first roll up core 1 with the second rolls up utmost point ear structure 3 on the core 2 and sets up the position different. This also eliminates the magnetic induction coils to reduce or eliminate magnetic field noise floor.
Specifically, as shown in fig. 3, the first winding core 1 and the second winding core 2 are sleeved together, the first winding core 1 and the second winding core 2 are provided with an interval therebetween, the first winding core 1 is wound in the counterclockwise direction, and the second winding core 2 is also wound in the counterclockwise direction. Because first book core 1 with second rolls up core 2 and is mutually independent first book core 1 with the second rolls up and is provided with utmost point ear structure 3 on the core 2 respectively, wherein first book core 1's the terminal inboard of coiling is provided with utmost point ear structure 3, simultaneously second rolls up core 2 and also is provided with utmost point ear structure 3 in the outside of coiling the head end.
In one example of the present invention, as shown in fig. 4 and 5, the cell structure includes a first winding core 1 and a second winding core 2; the first winding core 1 comprises a first positive plate 11, a first negative plate 12 and a first diaphragm 13, wherein the first positive plate 11 and the first negative plate 12 are formed in a winding mode; the second winding core 2 comprises a second positive electrode sheet 21, a second negative electrode sheet 22 and a second diaphragm 23 positioned between the second positive electrode sheet 21 and the second negative electrode sheet 22; the winding direction of the first winding core 1 is opposite to that of the second winding core 2, namely, the first winding core 1 and the second winding core 2 can be arranged in a stacked mode in the first state. For example, the first winding core 1 and the second winding core 2 can be arranged one above the other.
In addition, the tab structures 3 may be provided in two, for example, one tab structure 3 is provided at the winding end of the first winding core 1, and the other tab structure 3 is provided at the winding end of the second winding core 2. In this example, since the winding directions of the first winding core 1 and the second winding core 2 are opposite, when a current flows, the magnetic induction coil generated can be eliminated, thereby contributing to elimination of the noise. The tab structure 3 is arranged at the winding tail end of the pole piece, so that the tab structure can be conveniently led out.
In one example of the present invention, as shown in fig. 4, the cell structure includes a first winding core 1 and a second winding core 2; the first winding core 1 comprises a first positive plate 11, a first negative plate 12 and a first diaphragm 13, wherein the first positive plate 11 and the first negative plate 12 are formed in a winding mode; the second winding core 2 comprises a second positive electrode sheet 21, a second negative electrode sheet 22 and a second diaphragm 23 positioned between the second positive electrode sheet 21 and the second negative electrode sheet 22; the winding direction of the first winding core 1 is opposite to that of the second winding core 2, namely, the first winding core 1 and the second winding core 2 can be arranged in a stacked mode in the first state. For example, the first winding core 1 and the second winding core 2 may be arranged one above the other. The first winding core 1 and the second winding core 2 are connected in parallel, wherein the positive tab 31 of the first winding core 1 is electrically connected with the positive tab 31 of the second winding core 2, and the negative tab 32 of the first winding core 1 is electrically connected with the negative tab 32 of the second winding core 2.
In one example of the present invention, as shown in fig. 5 and 6, the cell structure includes a first winding core 1 and a second winding core 2; the first winding core 1 comprises a first positive plate 11, a first negative plate 12 and a first diaphragm 13, wherein the first positive plate 11 and the first negative plate 12 are formed in a winding mode; the second winding core 2 comprises a second positive electrode sheet 21, a second negative electrode sheet 22 and a second diaphragm 23 positioned between the second positive electrode sheet 21 and the second negative electrode sheet 22; the winding direction of the first winding core 1 is opposite to that of the second winding core 2, namely, the first winding core 1 and the second winding core 2 can be arranged in a stacked mode in the first state. For example, the first winding core 1 and the second winding core 2 may be arranged one above the other. The first winding core 1 and the second winding core are connected in series 2, wherein the positive tab 31 of the first winding core 1 is electrically connected with the negative tab 32 of the second winding core 2, or the negative tab 32 of the first winding core 1 is electrically connected with the positive tab 31 of the second winding core 2. Both of these ways can achieve a series connection of the first winding core 1 and the second winding core 2.
According to another embodiment of the invention, a battery is also provided. The battery may be a primary battery or a secondary battery, which is not limited in the present invention.
The battery includes:
a housing; and
the battery cell structure of any one of the above, wherein the battery cell structure is disposed in the casing.
Wherein, the shell can be in a cylindrical or square cylindrical structure. In the interior of the housing, for example, an accommodating chamber can be provided. The cell structure is accommodated in the accommodating cavity.
In one example of the present invention, the housing may be made of a ferromagnetic material. This may further shield the magnetic field generated by the cell structure.
According to another embodiment of the invention, an electronic device is also provided.
The electronic device comprises a battery as described above.
The electronic device may be, for example, a smart phone, a tablet computer, a notebook computer, an electronic book, various smart wearable devices, and the like, and the specific type of the electronic device is not limited in the present invention.
Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for the purpose of illustration and is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (7)
1. A cell structure, comprising:
the first winding core comprises a first positive plate, a first negative plate and a first diaphragm, wherein the first positive plate and the first negative plate are formed in a winding mode, and the first diaphragm is positioned between the first positive plate and the first negative plate;
the second winding core comprises a second positive plate, a second negative plate and a second diaphragm, wherein the second positive plate and the second negative plate are formed in a winding mode, and the second diaphragm is located between the second positive plate and the second negative plate; and the number of the first and second groups,
at least one tab structure comprising a positive tab and a negative tab;
the first winding core and the second winding core have a first state in which the winding directions are opposite to each other and a second state in which the winding directions are the same,
in the second state, one of the first winding core and the second winding core is provided with the tab structure at the winding tail end, and the other of the first winding core and the second winding core is provided with the tab structure at the winding head end;
the middle part of the second roll core forms an accommodating cavity for accommodating the first roll core, and the first roll core is arranged in the accommodating cavity so that the first roll core and the second roll core form a sleeving arrangement.
2. The cell structure of claim 1, wherein in the first state, one of the first winding core and the second winding core is wound in a clockwise direction and the other of the first winding core and the second winding core is wound in a counterclockwise direction;
under the second state, the first roll core and the second roll core are wound in the clockwise direction, or the first roll core and the second roll core are wound in the anticlockwise direction.
3. The battery core structure according to claim 1, wherein in the first state, a winding tail end of the first positive plate of the first winding core is integrally connected with a winding head end of the second positive plate of the second winding core, and a winding tail end of the first negative plate of the first winding core is integrally connected with a winding head end of the second negative plate of the second winding core;
the tab structure is arranged at the winding tail end of the second winding core.
4. The cell structure of claim 3, wherein the positive tab of the tab structure is disposed at a winding end of the second positive tab,
and the negative electrode tab of the tab structure is arranged at the winding tail end of the second negative electrode sheet.
5. The cell structure of claim 1, wherein a space is provided between the first winding core and the second winding core;
in the first state, the first winding core and the second winding core are both provided with the lug structure at the winding tail end;
in the second state, the first winding core is provided with the lug structure at the inner side of the winding tail end, and the second winding core is provided with the lug structure at the outer side of the winding head end.
6. A battery, comprising:
a housing; and
the cell structure of any of claims 1-5, disposed within the housing.
7. An electronic device, comprising: the battery of claim 6.
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| CN113381078A (en) * | 2021-06-08 | 2021-09-10 | 歌尔科技有限公司 | Winding type battery and TWS Bluetooth headset |
| CN113394465B (en) * | 2021-06-08 | 2022-11-22 | 歌尔智能科技有限公司 | Winding type battery and TWS Bluetooth headset |
| CN113381079B (en) * | 2021-06-08 | 2022-07-08 | 歌尔科技有限公司 | Winding type battery and TWS Bluetooth headset |
| CN113258123A (en) * | 2021-06-25 | 2021-08-13 | 珠海冠宇电池股份有限公司 | Winding type battery cell and battery |
| CN113451661A (en) * | 2021-06-25 | 2021-09-28 | 歌尔科技有限公司 | Earphone set |
| CN114497753A (en) * | 2022-01-13 | 2022-05-13 | 岚图汽车科技有限公司 | Power battery and electric automobile |
| CN114583236A (en) * | 2022-03-04 | 2022-06-03 | 宁德新能源科技有限公司 | Electrochemical device and electric equipment |
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