WO2013127313A1

WO2013127313A1 - Battery and terminal

Info

Publication number: WO2013127313A1
Application number: PCT/CN2013/071751
Authority: WO
Inventors: 赵文龙
Original assignee: 华为终端有限公司
Priority date: 2012-02-28
Filing date: 2013-02-22
Publication date: 2013-09-06
Also published as: CN102544594A

Abstract

A battery and a terminal provided in the embodiment of the present invention are involved in electronic field. The battery and the terminal enable a current flowing through a positive plate and a negative plate being equal in amplitude and opposite in direction to reduce the magnetic field background noise. Further, not only the production cost of the battery is not increased, but also of the terminal. The battery in this embodiment includes a battery core, and the battery core comprises the positive plate, a separator and the negative plate stacked sequentially and wound, a positive tab electrically contacted with the positive plate and a negative tab electrically contacted with the cathode plate. The battery is characterized in that the positive tab and the negative tab lie in the same side of the positive plate and the negative plate, which enables the current flowing through the anode plate and the cathode plate being equal in amplitude and opposite in direction.

Description

A BATTERY AND TERMINAL This application claims priority to Chinese Patent Application No. 201210047704.5, filed on Feb. 28, 2012, the entire disclosure of which is hereby incorporated by reference.

TECHNICAL FIELD The present invention relates to the field of electronics, and in particular, to a battery and a terminal. BACKGROUND OF THE INVENTION In recent years, with the popularization of digital mobile phones, radio waves transmitted by digital mobile phones form an electromagnetic field around the antenna, which causes people wearing hearing aids to hear harsh snoring, and more and more hearing aids are equipped with Dais began to complain that their digital mobile phones and hearing aids are not well compatible. One of the reasons is that the magnetic field generated by digital mobile phones has a large noise floor. The noise floor, or noise floor, is also known as background noise. Generally refers to the total noise in the electro-acoustic system except the useful signal: including the noise of the audio equipment and the noise of the sound environment. Therefore, seeking good compatibility between hearing aids and digital mobile phones has become a common concern for hearing aid manufacturers, digital mobile phone manufacturers, and network service providers.

However, in the process of realizing the above-mentioned reduction of the magnetic field noise floor, the inventors have found that most of the magnetic field noise floor comes from the battery. In the prior art, at least the following problems exist: Most of the magnetic field noise floor comes from the battery, and the prior art passes Devices with Hearing Aid Compatibility (HAC, Hearing Aid Compatibility) are added to digital mobile phones to increase the signal-to-noise ratio of the magnetic field by increasing the strength of the magnetic field. However, in actual use, the prior art cannot effectively reduce The magnetic field noise floor, and also increases the production cost of digital mobile phones. SUMMARY OF THE INVENTION Embodiments of the present invention provide a battery and a terminal, which can make the current flowing on the positive electrode and the negative electrode equal in magnitude and opposite in direction to reduce the magnetic field noise. Further, However, the production cost of the battery is not increased, and the production cost of the terminal is not increased.

In order to achieve the above object, embodiments of the present invention use the following technical solutions:

In one aspect, an embodiment of the present invention provides a battery including a battery core, the battery core includes a positive electrode sheet, a separator, a negative electrode sheet, and a positive electrode ear electrically contacting the positive electrode sheet, and a positive electrode layer, which are sequentially stacked and wound. a negative electrode ear electrically contacting the negative electrode sheet, wherein the positive electrode ear and the negative electrode ear are located at the same end of the positive electrode sheet and the negative electrode sheet such that a current flowing on the positive electrode sheet flows with the negative electrode sheet The currents are equal in magnitude and opposite in direction.

In one aspect, an embodiment of the present invention provides a terminal, including a battery core, the battery core includes a positive electrode sheet, a separator, a negative electrode sheet, and a positive electrode ear electrically contacting the positive electrode sheet, and a positive electrode, which are sequentially stacked and wound. a negative electrode ear electrically contacting the negative electrode sheet, wherein the positive electrode ear and the negative electrode ear are located at the same end of the positive electrode sheet and the negative electrode sheet such that a current flowing on the positive electrode sheet flows with the negative electrode sheet The currents are equal in magnitude and opposite in direction.

The battery and the terminal provided by the embodiments of the present invention are provided, wherein the positive electrode tab and the negative electrode tab are disposed at the same end of the positive electrode sheet, the separator and the negative electrode sheet which are sequentially stacked and wound, wherein the positive electrode tab and the positive electrode tab are in electrical contact, and the negative electrode tab is The negative electrode tab is electrically contacted so that the current flowing on the positive electrode tab is equal in magnitude and opposite in direction to the current flowing on the negative electrode tab. According to this scheme, the current flowing on the positive electrode tab and the negative electrode tab can be equal in magnitude and opposite in direction to reduce the noise floor noise, and further, not only does not increase the production cost of the battery, but also increases the production cost of the terminal.

BRIEF DESCRIPTION OF THE 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 embodiments or the description of the prior art will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

1 is a schematic structural view 1 of a battery core according to an embodiment of the present invention;

2 is a schematic structural view of a positive (negative) pole piece according to an embodiment of the present invention; FIG. 3 is a schematic diagram of a magnetic field generated on a current-carrying coil axis according to an embodiment of the present invention; 4 is a schematic structural view of a prior art battery core;

FIG. 5 is a schematic structural diagram 2 of a battery core according to an embodiment of the present invention; FIG.

6 is a schematic structural view 3 of a battery core according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram 2 of a positive (negative) pole piece according to an embodiment of the present invention. The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

An embodiment of the present invention provides a battery including a battery core. As shown in FIG. 1, the battery core includes a positive electrode sheet 10, a separator 11, a negative electrode sheet 12, and a positive electrode sheet 10, which are sequentially stacked and wound. a positive electrode tab 13 in contact with the negative electrode tab 14 in electrical contact with the negative electrode tab 12, wherein the positive electrode tab 13 and the negative electrode tab 14 are located at the same end of the positive electrode tab 10 and the negative electrode tab 12, such that the The current flowing on the positive electrode tab 10 is equal to the current flowing on the negative electrode tab 12, and is opposite in direction.

Since the current flowing on the positive electrode sheet 10 and the current flowing on the negative electrode sheet 12 are equal in magnitude and opposite in direction, the magnetic fields generated at the distal end of the positive and negative electrode sheets cancel each other, thereby reducing the magnetic field noise.

2 is a schematic view showing the structure of the positive electrode tab 10 (or the negative electrode tab 12), in which the positive electrode tab 13 is in electrical contact with the positive electrode tab 10 (or the negative electrode tab 14 is in electrical contact with the negative electrode tab 12).

Here, as shown in Fig. 3, the principle of the current generating magnetic field and the like will be described in detail. Figure 3 shows the magnetic field on the axis of the current-carrying coil:

Let the current ring I pass through the wire ring with the radius R, and take the current element on the ring. The magnetic induction intensity of the current element from the field point P at the ring X on the ring axis is: dB = ^ 4π r ² (where is the permeability of the vacuum)

As can be seen from Fig. 3, α is the angle between r and R, the sum of α and Θ is 90 degrees, dB is perpendicular to r, ^« _± is perpendicular to the axis, and _r is perpendicular.

By symmetry: the magnetic induction intensity generated by the entire ring at point P is perpendicular to the axis direction The component is equal to zero, ie: ^β 1 ⁼ ^ ^1 =

u _n IR - dl

The component parallel to the axis direction is: 4 (R ² + x ^{2 2}

Therefore, the magnetic induction intensity generated by the entire current-carrying circular coil at point P is:

1 When x = 0, the current flowing on the current-carrying coil is generated at the center of the circle

_B =

The magnetic induction intensity is: 2R

2 When x » R: – 2πκ ³ — 2πκ ³ , where m is the magnetic moment of the current-carrying circular coil, and S is the area of the circle formed by the current-carrying circular coil.

A magnetic field is generated around the current, which is the magnetic field strength generated by the current-carrying circular coil at a point in space. Since a constant current produces a constant magnetic field and the varying current produces a changing magnetic field, then if the current flowing in the current-carrying circular coil changes and the frequency of change is in the audio range, a corresponding effect occurs around the current-carrying coil. The frequency changes the magnetic field.

Further, as shown in FIG. 4, the battery of the prior art is a positive electrode sheet 10, a separator (not shown), a negative electrode sheet 12, and a positive electrode tab 13 which are sequentially stacked and wound, and are disposed in this order. One end of the positive electrode sheet 10 of the positive electrode sheet 10, the separator and the negative electrode sheet 12, and the negative electrode tab 14 are located at the other end of the negative electrode sheet 12 of the positive electrode sheet 10, the separator, and the negative electrode sheet 12 which are sequentially stacked, that is, the positive electrode tab 13 Located at the winding end of the positive electrode sheet 10, the negative electrode tab 14 is located at the winding end of the negative electrode sheet 12, or the positive electrode tab 13 is located at the winding end of the positive electrode sheet 10, and the negative electrode tab 14 is located at the winding end of the negative electrode sheet 12, The current flowing through the positive electrode tab 10 and the negative electrode tab 12 in the wound cell is approximately annular (the current direction is indicated by a broken line in Fig. 4). From the magnetic field on the axis of the current-carrying circular coil, the magnetic field generated by the toroidal current is very strong. For a typical circular current, the magnetic field is calculated as: When the current of the wire ring of radius R is passed, the circle is rounded. The magnetic field strength at the center is (where ₀ is the magnetic permeability of the vacuum), so that the magnetic field strength is proportional to the current, and the larger the current changes, the larger the magnetic field changes.

Further, as shown in FIG. 5, the battery provided by the embodiment of the present invention is a positive electrode sheet 10, a diaphragm (not shown), a negative electrode sheet 12, and a positive electrode tab 13 and a negative electrode tab 14 respectively stacked and wound in sequence. Located at the same end of the positive electrode tab 10 and the negative electrode tab 12, that is, the positive electrode tab 13 and the negative electrode tab 14 are located at the winding end of the positive electrode tab 10 and the negative electrode tab 12, or the positive tab 13 and the negative tab 14 are located at the positive tab 10, The winding end of the negative electrode sheet 12, thus after winding The current flowing on the positive electrode tab 10 in the cell is equal to the current flowing in the negative electrode tab 12, and the direction is opposite (the current direction is indicated by a broken line in Fig. 5). Since the distance between the positive and negative plates is very small, the magnetic field generated at the far end of the positive and negative plates can be substantially eliminated, thereby achieving a low magnetic field noise cell design, that is, reducing the magnetic field noise, and not increasing The production cost of the battery. Wherein, the positive electrode is in electrical contact with the positive electrode, and the negative electrode is in electrical contact with the negative electrode.

Further, as shown in FIG. 5, the positive electrode tab 13 and the negative electrode tab 14 are located at the winding end of the positive electrode tab 10 and the negative electrode tab 12, that is, the wound positive tab 13 and the negative tab 14 are located outside the cell;

Alternatively, as shown in Fig. 6, the positive electrode tab 13 and the negative electrode tab 14 are located at the winding end of the positive electrode tab 10 and the negative electrode tab 12, that is, the wound positive tab 13 and the negative tab 14 are located inside the cell.

Further, the battery of the embodiment of the invention further includes a battery case, and the battery core is disposed inside the battery case.

Further, the battery of the embodiment of the invention further includes a cell casing, the cell is disposed inside the cell casing, and the cell casing is disposed inside the battery casing.

Further, the material of the battery case may be a ferromagnetic material. The battery case is used to package the battery core and the battery case. Common battery housings do not use ferromagnetic materials. In the embodiment of the present invention, a ferromagnetic material such as iron, steel, nickel or cobalt is used to integrally encapsulate the battery core and the battery core casing, and the magnetic field can be further shielded.

Further, a cell casing of a ferromagnetic material may be used, and a cell is disposed inside the cell casing. At present, the design of the lithium ion battery is basically using an aluminum battery case, and the magnetic field is not well shielded. In the embodiment of the present invention, a ferromagnetic material such as iron, steel, nickel or cobalt is used as the core case design, which can be further Shield the magnetic field generated by the cell.

Further, the length of the positive electrode tab 13 is not less than the width of the positive electrode tab 10, and the length of the negative electrode tab 14 is not less than the width of the negative electrode tab 12. That is, the length of the positive electrode tab 13 may be greater than or equal to the width of the positive electrode tab 10, and the length of the negative electrode tab 14 may be greater than or equal to the width of the negative electrode tab 12. Preferably, as shown in FIG. 7, the length of the positive electrode tab 13 may be greater than the width of the positive electrode tab 10, and the length of the negative electrode tab 14 may be greater than the width of the negative electrode tab 12, so that the positive and negative ear can be wound from the package during battery packaging. The cell extends to contact the positive and negative terminals of the cell housing.

The battery provided by the embodiment of the present invention is characterized in that the positive electrode tab and the negative electrode tab are disposed at the same end of the positive electrode tab and the negative electrode tab, wherein the positive electrode tab is in electrical contact with the positive electrode tab, and the negative electrode tab is electrically contacted with the negative electrode tab to make the positive electrode The current flowing on the sheet is equal to the current flowing on the negative electrode sheet, and the direction is opposite. Through this scheme, the positive electrode sheet and the negative electrode sheet can be flowed The currents are equal in magnitude and opposite in direction to reduce the noise floor noise, and further, not only does not increase the production cost of the battery, but also increases the production cost of the terminal.

According to the embodiment of the present invention, the terminal includes a battery core. As shown in FIG. 1 , the battery core includes a positive electrode sheet 10 , a diaphragm 11 , a negative electrode sheet 12 , and the positive electrode sheet which are sequentially stacked and wound. a positive contact 13 electrically contacting the negative electrode tab 14 in electrical contact with the negative electrode tab 12, wherein the positive electrode tab 13 and the negative electrode tab 14 are located at the same end of the positive electrode tab 10 and the negative electrode tab 12, so that The current flowing on the positive electrode sheet 10 is equal to the current flowing on the negative electrode sheet 12, and the direction is opposite.

Further, the positive electrode tab 13 and the negative electrode tab 14 are located at the same end of the positive electrode tab 10 and the negative pole tab 12, and include:

The positive electrode tab 13 and the negative electrode tab 14 are located at the winding end of the positive electrode tab 10 and the negative electrode tab 12;

Alternatively, the positive electrode tab 13 and the negative electrode tab 14 are located at the winding ends of the positive electrode tab 10 and the negative electrode tab 12.

Further, the battery core is covered with a core housing of a ferromagnetic material. A cell casing of a ferromagnetic material may be used, and a cell is disposed inside the cell casing. At present, the design of the lithium ion battery is basically using an aluminum battery case, and the magnetic field cannot be shielded well. In the embodiment of the present invention, a ferromagnetic material such as iron, steel, nickel or cobalt is used as the core case design, which can be further Shield the magnetic field generated by the cell.

Further, the battery case is covered with a battery case of a ferromagnetic material. The material of the battery case may be a ferromagnetic material. The battery case is used to encapsulate the battery cells. Ferromagnetic materials are not used in common battery housings. The embodiment of the present invention uses a ferromagnetic material such as iron, steel, nickel, cobalt or the like as a battery case design to further shield the magnetic field.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention.

Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

Rights request

What is claimed is: 1. A battery comprising a battery core, wherein the battery core comprises a positive electrode sheet, a separator, a negative electrode sheet, and a positive electrode tab in electrical contact with the positive electrode sheet, and is electrically contacted with the negative electrode sheet. a negative electrode ear, wherein the positive electrode ear and the negative electrode ear are located at the same end of the positive electrode tab and the negative electrode tab such that a current flowing on the positive electrode tab is equal to a current flowing on the negative electrode tab, and the direction is opposite .

2. The battery according to claim 1, wherein the positive electrode tab and the negative electrode tab are located at the same end of the positive electrode tab and the negative electrode tab:

The positive electrode tab and the negative electrode tab are located at the winding end of the positive electrode tab and the negative electrode tab; or the positive electrode tab and the negative electrode tab are located at the winding end of the positive electrode tab and the negative electrode tab.

The battery according to any one of claims 1 to 2, further comprising a battery case, wherein the battery cell is disposed inside the battery case.

4. The battery according to claim 3, further comprising a cell casing, wherein the cell is disposed inside the cell casing, and the cell casing is disposed inside the battery casing.

The battery according to any one of claims 3 or 4, wherein the material of the battery case is a ferromagnetic material.

6. The battery according to claim 4, wherein the material of the cell casing is a ferromagnetic material.

The battery according to any one of claims 1 to 6, wherein the length of the positive electrode tab is not less than the width of the positive electrode tab, and the length of the negative electrode tab is not less than the width of the negative electrode tab.

8. A terminal, comprising: a battery core, the battery core comprising a positive electrode sheet, a separator, a negative electrode sheet, and a positive electrode tab in electrical contact with the positive electrode sheet, and the negative electrode, which are sequentially stacked and wound a negative electrode ear for electrical contact, wherein the positive electrode ear and the negative electrode ear are located at the same end of the positive electrode tab and the negative electrode tab such that a current flowing on the positive electrode tab and a current flowing on the negative electrode tab Equal, opposite directions.

9. The terminal according to claim 8, wherein the positive electrode tab and the negative electrode tab are located at the same end of the positive electrode tab and the negative electrode tab:

The positive electrode tab and the negative electrode tab are located at the winding front end of the positive electrode sheet and the negative electrode sheet; or the positive electrode tab and the negative electrode tab are located at the winding of the positive electrode sheet and the negative electrode sheet End.

The terminal according to claim 8 or 9, wherein the battery core is covered with a core housing of a ferromagnetic material.

The terminal according to claim 10, wherein the battery case is covered with a battery case of a ferromagnetic material.