CN217562681U - Soft packet of button lithium cell of antimagnetic interference - Google Patents

Abstract

The utility model discloses a soft package button lithium battery for preventing magnetic interference, which comprises a winding core with an aluminum plastic film shell, wherein a positive plate and a negative plate are used for leading current out of the winding core, the winding core is formed by laminating two or more pairs of positive plates, negative plates and diaphragms and then winding, the positive plates are electrically connected with a positive pole lug, the negative plates are electrically connected with a negative pole lug, and the positive pole lug and the negative pole lug both extend out of the winding core; the utility model provides a soft packet of button lithium cell's book core sets up the jam-proof copper foil at book core outer lane, effectively block electromagnetic interference, anodal utmost point ear and negative pole utmost point ear are located same one side, through set up the jam-proof top cap at plastic-aluminum membrane shell inner wall, separate the magnetism processing at the top of battery, the rational in infrastructure of this application, can effectively prevent that the battery from being disturbed by outside magnetic field, avoid appearing the situation of battery current loss, high durability and convenient use, and the size of battery does not increase, production cost has both been practiced thrift, the life of battery has effectively been improved again.

Description

Soft packet of button lithium cell of anti-magnetic interference

Technical Field

The utility model relates to a lithium cell field, concretely relates to soft packet of button lithium cell of antimagnetic interference.

Background

The laminate polymer battery is structurally packaged by an aluminum-plastic film, and at most, only can be blown to air and cracked under the condition of potential safety hazards. For example: a polymer shell is sleeved on a liquid lithium ion battery. The soft package battery has the advantages of good safety and light weight, and in addition, the internal resistance of the soft package battery is small, so that the self power consumption of the battery can be greatly reduced, and the cycle life of the battery is longer. Especially, for light and long endurance of wireless headsets, soft package batteries are generally adopted.

However, the soft package battery has defects, and an additional metal shell is not arranged in the grouping process, so that the earphone sound quality is easily influenced by magnetic interference. The use of an external metal housing can significantly increase the weight and manufacturing cost.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model aims at providing a can effectively reduce magnetic interference's soft packet of button lithium cell.

To realize the technical purpose, the utility model discloses a scheme is: the anti-magnetic interference soft package button lithium battery comprises a winding core with an aluminum plastic film shell, wherein the winding core body is a cylinder or an arc-shaped body, the winding core comprises a positive plate and a negative plate, the positive plate and the negative plate are used for leading current from the inside of the winding core, the winding core is formed by winding two or more than two pairs of positive plates, negative plates and diaphragms after being laminated, the positive plate is electrically connected with a positive pole lug, the negative plate is electrically connected with a negative pole lug, and the positive pole lug and the negative pole lug both extend out of the winding core;

the anti-interference device is characterized in that an anti-interference outer cover is further arranged between the winding core and the aluminum plastic film shell, the anti-interference outer cover is wrapped on the winding core outer ring, an annular anti-interference top cover is arranged at the top of the winding core, and the inner diameter of the anti-interference top cover is the same as the outer diameter of the winding core.

Preferably, the anti-interference top cover is attached to the aluminum-plastic film shell, and a notch groove for allowing the positive electrode tab and the negative electrode tab to pass through is formed in the anti-interference top cover.

Preferably, an anti-corrosion insulating layer is provided on the outer sides of the interference prevention cap and the interference prevention housing.

Preferably, the positive electrode tab and the negative electrode tab are both of flexible nickel strip structures.

As preferred, anodal utmost point ear and negative pole utmost point ear include strap and insulating film, anodal utmost point ear and negative pole utmost point ear are through insulating film fixed connection in rolling up core body periphery, anodal utmost point ear and negative pole utmost point ear are located the same one side of rolling up the core.

Preferably, the anti-interference top cover is connected with the aluminum plastic film shell through glue in an adhesive mode.

The beneficial effects of the utility model are that: according to the soft package button lithium battery, the anti-interference outer cover of the copper foil structure is arranged on the outer ring of the winding core, so that electromagnetic interference is effectively blocked, the positive electrode lug and the negative electrode lug are positioned on the same side, and the anti-interference top cover of the copper foil structure is arranged on the inner wall of the aluminum-plastic film shell, so that the top of the battery is subjected to magnetic isolation treatment; the battery anti-interference device is reasonable in structure, can effectively prevent the battery from being interfered by an external magnetic field, is convenient to use, effectively controls the weight while not changing the existing process materials, saves the production cost, and can effectively improve the anti-interference capacity of the battery.

Drawings

Fig. 1 is a schematic structural view of a roll core in the present invention;

fig. 2 is a schematic structural view of the anti-interference housing and the anti-interference top cover of the present invention.

In the figure: 1, positive plate; 2, a negative plate; 3, a diaphragm; 4, a positive pole lug; 5, a negative pole tab; 6 an anti-interference outer cover; 7 tamper proof cap.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. In order to clearly and completely describe the technical scheme, the following embodiments are selected for illustration; the following embodiments are some of the embodiments of the present invention; based on this application, do not make other embodiments that obtain under the creative work prerequisite, all belong to the utility model discloses the scope of protection.

In the following embodiments, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top/bottom", and the like are all based on the orientations and positional relationships shown in the drawings, and are only for the convenience of clearly describing the embodiments, but do not indicate or imply that the referred devices or elements have to have specific orientations, and therefore, the present application is not limited thereto. Meanwhile, the terms "first" and "second" in the embodiments are used only for distinguishing the description purposes, and are not intended to indicate or imply relative importance.

As shown in fig. 1-2, specific embodiment be a soft packet of button lithium cell of antimagnetic interference, including the book core that has the plastic-aluminum membrane shell, roll up the core and include positive plate 1 and negative plate 2, positive plate 1 and negative plate 2 are used for drawing current from rolling up the in-core, roll up the core body and be cylinder or arc, this application is the cylinder preferably, occupies littleer position during the assembly, saves space more.

The winding core is formed by winding two or more pairs of positive plates 1, negative plates 2 and diaphragms 3 after being laminated, wherein the positive plates 1 are electrically connected with positive electrode tabs 4, the negative plates 2 are electrically connected with negative electrode tabs 5, and the positive electrode tabs 4 and the negative electrode tabs 5 extend out of the winding core; specifically, including strap and insulating film on anodal utmost point ear 4 and the negative pole utmost point ear 5, anodal utmost point ear 4 and negative pole utmost point ear 5 lie in same one side, and anodal utmost point ear 4 and negative pole utmost point ear 5 play insulating effect through insulating film fixed connection in the core body periphery of rolling up.

In order to realize the magnetic field interference prevention of the soft package button lithium battery, an annular anti-interference outer cover 6 is further arranged between the winding core and the aluminum-plastic film shell, the anti-interference outer cover 6 is coated on the outer surface of the winding core, an anti-interference copper foil can be adopted as the anti-interference outer cover, the copper foil has the effects of light weight and strong electromagnetic signal shielding, the periphery of the soft package button lithium battery is shielded from electromagnetic interference, and an insulating layer can be further coated on the outer ring of the copper foil, so that the battery insulation effect is better; in addition, form between roll core and the plastic-aluminum membrane shell and hold the chamber, anodal utmost point ear 4 and negative pole utmost point ear 5 stretch into and hold the intracavity, and the jam-proof top cap covers in the inner wall top that holds the chamber for carry out the anti-magnetic field interference to soft packet of button lithium cell's top and handle, jam-proof top cap 7 and the jam-proof dustcoat 6 outside are provided with the anticorrosive insulating layer.

When the soft package button lithium battery is manufactured, two or more pairs of positive plates 1, negative plates 2 and diaphragms 3 are laminated according to the sequence of the negative plates 2, the diaphragms 3, the positive plates 1, the diaphragms 3, the negative plates 2, the diaphragms 3 and the positive plates 1, the structure is coiled after lamination is completed to manufacture a roll core, and then a positive pole tab 4 and a negative pole tab 5 are packaged, wherein the positive pole tab 4 and the negative pole tab 5 extend towards the same direction of the roll core; and then plating a layer of anti-interference copper foil 6 on the outer ring of the winding core, bonding the anti-interference top cover 4 on the aluminum-plastic film shell through glue, and finally packaging the aluminum-plastic film shell on the periphery of the winding core plated with the anti-interference outer cover 6.

The conventional anti-interference soft package battery is usually formed by sticking an electromagnetic shielding sheet on the outer side of an aluminum plastic film, so that the processing process is increased, and the soft package battery is difficult to cover comprehensively. Because the electromagnetic shielding sheet is usually not wear-resistant and is easy to damage, the electromagnetic shielding sheet needs to be matched with a fixed shell for assembly, the processing process is further increased, and the overall total amount of the battery is also increased. The anti-interference outer cover and the anti-interference top cover of the copper foil structure are ingeniously adopted, the anti-interference insulating layer is arranged on the surface of the copper foil structure, the copper foil structure is prevented from being corroded by electrolyte, the copper foil is light in weight and easy to machine and form (even if a thin copper foil is adopted, the copper foil is not easy to damage due to the protection of an aluminum plastic film), the existing process is slightly changed, and the existing process can be adopted (a new aluminum plastic film material or a fixed shell does not need to be ordered).

The utility model provides a book core of soft packet of button lithium cell sets up the jam-proof dustcoat of copper foil structure at book core outer lane, effectively block electromagnetic interference, anodal utmost point ear and negative pole utmost point ear are located same one side, through the jam-proof top cap that sets up the copper foil structure at plastic-aluminum membrane shell inner wall, separate the magnetism processing at the top of battery, the rational in infrastructure of this application, can effectively prevent that the battery from being disturbed by outside magnetic field, high durability and convenient use, when not changing current technology material, existing effect control weight, and the production cost is also practiced thrift, the jam-proof ability of battery can also effectively be improved.

The above, only do the preferred embodiment of the present invention, not used to limit the present invention, all the technical matters of the present invention should be included in the protection scope of the present invention for any slight modification, equivalent replacement and improvement of the above embodiments.

Claims (5)

1. The utility model provides a soft packet of button lithium cell of antimagnetic interference which characterized in that: the winding core is formed by laminating two or more pairs of positive plates, negative plates and diaphragms and then winding, wherein the positive plates are electrically connected with positive pole tabs, the negative plates are electrically connected with negative pole tabs, and the positive pole tabs and the negative pole tabs extend out of the winding core;

roll up still to be provided with the jam-proof dustcoat between core and the plastic-aluminum membrane shell, the jam-proof dustcoat will roll up the core cladding wherein, it is provided with annular jam-proof top cap to roll up the core top, the internal diameter of jam-proof top cap is the same with the external diameter of rolling up the core.

2. The anti-magnetic interference soft pack button lithium battery of claim 1, wherein: the anti-interference top cover is attached to the aluminum-plastic film shell and provided with a notch groove through which the positive electrode lug and the negative electrode lug can penetrate.

3. The anti-magnetic interference soft pack button lithium battery of claim 1, wherein: and anti-corrosion insulating layers are arranged on the outer sides of the anti-interference top cover and the anti-interference outer cover.

4. The anti-magnetic interference soft pack button lithium battery of claim 1, wherein: and the positive electrode lug and the negative electrode lug are both of flexible nickel strip structures.

5. The anti-magnetic interference soft pack button lithium battery of claim 1, wherein: anodal utmost point ear and negative pole utmost point ear include strap and insulating film, anodal utmost point ear and negative pole utmost point ear are in rolling up core body periphery through insulating film fixed connection, anodal utmost point ear and negative pole utmost point ear lie in the same one side of rolling up the core.

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