CN216354645U - Tab, battery and terminal - Google Patents

Abstract

The present disclosure relates to a tab, a battery and a terminal. The disclosed tab is used for a battery, and the tab comprises: one or more welding zones at the ends of the tabs; and the flexible buffer area is positioned in the middle of the lug and is configured to divide the lug into more than two areas. In the present disclosure, the flexible buffer zone of the tab is disposed in the middle of the tab. The both ends of utmost point ear can be used for the welding, particularly, and the one end of utmost point ear can weld on the pole piece of electric core, and the other end of utmost point ear can weld external consumer or battery protection board. Such setting, when the battery removes or rocks, the displacement takes place for electric core, under this kind of condition, because the setting that flexible buffer set up, flexible deformation can take place for flexible buffer, can effectively cushion the pulling force, consequently can not drag the welding part of utmost point ear to avoid taking place the welding point foil and tear the problem that leads to utmost point ear to drop, promote the quality of battery.

Description

Tab, battery and terminal

Technical Field

The present disclosure relates to the field of battery manufacturing, and more particularly to a tab, a battery and a terminal.

Background

Currently, electronic products become an indispensable part of people's daily life, especially 3C products such as computers and mobile phones, so-called "3C products" are combinations of computers (computers), communications (communications) and consumer electronics (ConsumerElectronics), also called "information appliances". Wherein the endurance and charging performance of the battery in the electronic product seriously affect the user experience in the using process.

For some portable electronic devices, movement or activity often occurs during use, and devices inside the electronic device may be damaged during the movement or activity. For example, the tabs of the battery may play a critical role during the charging and discharging of the battery. When electronic equipment moves or moves, the tab may be damaged due to the movement of the battery cell, so that the charging and discharging functions of the electronic equipment are damaged, and the use experience of a user is influenced.

SUMMERY OF THE UTILITY MODEL

To overcome the problems in the related art, the present disclosure provides a tab, a battery, and a terminal.

According to a first aspect of the embodiments of the present disclosure, there is provided a tab for a battery, the tab including: one or more welding zones at the ends of the tabs; and the flexible buffer area is positioned in the middle of the lug and is configured to divide the lug into more than two areas.

In one embodiment, the flexible buffer region comprises one of a conductive flexible rubber, a conductive fiber cloth and a conductive carbon cloth.

In one embodiment, the tab includes: a first weld region at a first end of the tab; a second weld region at a second end of the tab, the first end being disposed opposite the second end; the compliant buffer region is located between the first and second bond pads.

In one embodiment, the tab includes: and the tab glue is positioned between the first welding area and the flexible buffer area.

According to a second aspect of embodiments of the present disclosure, there is provided a battery including: an electric core; the battery cell comprises more than two tabs according to the previous embodiment, wherein one end of each tab is arranged inside the battery cell.

In an embodiment, the flexible buffer region is located outside the battery cell.

In one embodiment, the battery further includes a protection plate coupled to the first end of the tab.

In one embodiment, the cell includes: a region of empty foil; and the active material area is arranged adjacent to the empty foil area, and the second end of the tab is connected with the empty foil area.

In one embodiment, the cell includes: the first tab is configured as the positive electrode of the battery, a first tab glue is arranged on the first tab, and the first tab glue is positioned on the outer side of the battery core; and the second tab is configured to be the negative electrode of the battery, a second tab adhesive is arranged on the second tab, and the second tab adhesive is positioned on the outer side of the battery core, wherein the color of the first tab adhesive is different from that of the second tab adhesive.

According to a third aspect of embodiments of the present disclosure, there is provided a terminal comprising a battery as described in any one of the preceding embodiments.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: in the present disclosure, the flexible buffer zone of the tab is disposed in the middle of the tab. The both ends of utmost point ear can be used for the welding, particularly, and the one end of utmost point ear can weld on the pole piece of electric core, and the other end of utmost point ear can weld external consumer or battery protection board. Such setting, when the battery removes or rocks, the displacement takes place for electric core, under this kind of condition, because the setting that flexible buffer set up, flexible deformation can take place for flexible buffer, can effectively cushion the pulling force, consequently can not drag the welding part of utmost point ear to avoid taking place the welding point foil and tear the problem that leads to utmost point ear to drop, promote the quality of battery.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic structural view illustrating a tab according to an exemplary embodiment.

Fig. 2 is a schematic diagram illustrating the structure of a battery according to an exemplary embodiment.

Fig. 3 is a schematic diagram illustrating a cross-section of a battery according to an exemplary embodiment.

Fig. 4 is a schematic diagram illustrating a structure of a terminal according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure as detailed in the claims.

Currently, electronic products become an indispensable part of people's daily life, especially 3C products such as computers and mobile phones, so-called "3C products" are combinations of computers (computers), communications (communications) and consumer electronics (ConsumerElectronics), also called "information appliances". Wherein the endurance and charging performance of the battery in the electronic product seriously affect the user experience in the using process.

For some portable electronic devices, movement or activity often occurs during use, and devices inside the electronic device may be damaged during the movement or activity. For example, the tabs of the battery may play a critical role during the charging and discharging of the battery. When electronic equipment moves or moves, the tab may be damaged due to the movement of the battery cell, so that the charging and discharging functions of the electronic equipment are damaged, and the use experience of a user is influenced.

To overcome the problems in the related art, the present disclosure provides a tab, a battery, and a terminal.

The present disclosure provides a tab for a battery, the tab comprising: one or more welding zones at the ends of the tabs; and the flexible buffer area is positioned in the middle of the lug and is configured to divide the lug into more than two areas.

In the present disclosure, the flexible buffer zone of the tab is disposed in the middle of the tab. The both ends of utmost point ear can be used for the welding, particularly, and the one end of utmost point ear can weld on the pole piece of electric core, and the other end of utmost point ear can weld external consumer or battery protection board. Such setting, when the battery removes or rocks, the displacement takes place for electric core, under this kind of condition, because the setting that flexible buffer set up, flexible deformation can take place for flexible buffer, can effectively cushion the pulling force, consequently can not drag the welding part of utmost point ear to avoid taking place the problem that the welding point foil material is torn and is leaded to utmost point ear to drop.

Fig. 1 is a schematic structural view illustrating a tab according to an exemplary embodiment. As shown in fig. 1, in the present disclosure, a tab 10 for a battery may include: one or more welding zones, which may be located at the ends of the tab 10 for welding the tab to a cell, a protection plate, or a consumer, and a compliant buffer zone 102. The flexible buffer region 102 may be located in the middle of the tab 10, and in the middle of the tab 10, may be any region except for the end of the tab 10, as long as the tab can be divided into two or more regions.

With the adoption of the arrangement, when the components connected with the two ends of the lug move, the flexible buffer area can play a certain buffer role through stretching or twisting, so that the acting force generated by the movement of the components at the two ends is prevented from being transmitted to the other end part of the lug, and the connection reliability of the lug is prevented from being influenced.

As shown in fig. 1, in an exemplary embodiment of the present disclosure, the tab 10 may include a first welding region 101 at a first end of the tab 10. And a second welding region 103 at a second end of the tab 10, the first end being disposed opposite to the second end. Specifically, the first end and the second end may be opposite end portions in a length direction of the tab 10.

For example, the first welding region 101 of the tab 10 may be used for welding to external electric equipment or a battery protection plate, and the second welding region 103 of the tab 10 may be used for welding to a tab of a battery cell.

In such an embodiment, the flexible buffer region 102 may be located between the first bonding region 101 and the second bonding region 103. The flexible buffer area 102 may be disposed adjacent to the first and second bonding areas 101 and 103, respectively, or may not be disposed adjacent thereto.

For example, as shown in fig. 1, the tab 10 of the present disclosure may further include a tab paste 40, and the tab paste 40 may be located between the first welding region 101 and the flexible buffer region 102. In this case, the first welding region 101 is not adjacent to the flexible buffer region 102 but spaced apart from each other by a region for disposing the tab paste 40.

In the present disclosure, the tab 10 may be formed by compounding two parts, namely a tab glue 40 and a metal band, the tab glue 40 is an insulated part on the tab 10, the tab glue 40 may prevent a short circuit between the metal band and an aluminum plastic film as a package body when the battery is packaged, and the tab glue is hot-melted and sealed with the aluminum plastic film in a heating manner to prevent leakage when packaged.

In the present disclosure, the tab glue 40 is disposed between the first welding region 101 and the flexible buffer region 102, which can avoid affecting the welding of the tab 10, and can also avoid affecting the flexibility of the flexible buffer region 102, for example, avoiding reducing the flexibility of the flexible buffer region 102.

In an exemplary embodiment of the present disclosure, the flexible buffer region 102 may include one of conductive flexible rubber, conductive fiber cloth, and conductive carbon cloth. Due to the arrangement, the middle part of the tab 10 can be flexible to avoid traction damage, and meanwhile, the conductive requirement of the tab can be met.

Specifically, the conductive flexible rubber of the present disclosure may be made by uniformly distributing conductive particles such as silver-plated glass, silver-plated aluminum, silver, etc. in silicone rubber, and contacting the conductive particles by pressure. The conductive flexible rubber of the present disclosure may include any one of CON SIL-NC (graphite nickel filled silicone rubber), CON SIL-V (silver filled silicone rubber extrusion gasket), CON SIL-a (aluminum silver filled silicone rubber), CON SIL-N (nickel silver filled silicone rubber), CON SIL-C (copper silver filled silicone rubber), SC-CON SIL (graphite filled silicone rubber), CON SIL-R (pure silver filled silicone rubber), CON SIL-II (silver filled silicone rubber molding gasket), and the like.

The conductive fiber cloth of the present disclosure may be a conductive fiber cloth obtained by pre-treating a fiber cloth (e.g., a polyester fiber cloth) and then applying an electroplated metal coating to impart a metallic property. The conductive fiber cloth of the present disclosure may include any one of nickel-plated conductive cloth, gold-plated conductive cloth, carbon-plated conductive cloth, and aluminum foil fiber composite cloth.

The conductive carbon cloth of the present disclosure may be made of conductive carbon fibers.

Based on the same concept, the present disclosure may also provide a battery. Fig. 2 is a schematic diagram illustrating the structure of a battery according to an exemplary embodiment. Fig. 3 is a schematic diagram illustrating a cross-section of a battery according to an exemplary embodiment. As shown in fig. 2 and 3, the battery of the present disclosure may include: an electrical core 80; two or more tabs according to any of the preceding embodiments, one end of each tab being disposed inside the battery cell 80.

In the present disclosure, the battery may be a lithium ion battery, for example, may include a housing 70 and a cell 80. The casing 70 is used for accommodating the battery cell 80 and protecting the battery cell 80.

The housing 70 may be a soft-packed case. The battery cell is packaged in the shell through a packaging process, namely the battery cell is a soft-package battery cell and can also be called as a polymer battery cell. The soft package shell can adopt an aluminum plastic film and consists of a nylon layer, an aluminum layer and a plastic material layer. The nylon layer ensures the appearance of the soft cladding shell as the outermost layer of the appearance, the aluminum layer plays a role in water resistance, external water vapor is prevented from entering the battery cell, the plastic material layer is melted at high temperature and has certain viscosity, and the plastic material layer is bonded with the battery cell after being cooled and solidified. The layer of plastic material may be polypropylene (PP), Polyethylene (PE) or polyethylene terephthalate (PET).

However, the present disclosure is not limited thereto, and the battery case may be made of a plastic material or a metal material in the lithium ion battery. The plastic material and the metal material can have certain hardness and can resist external impact so as to achieve the purpose of protecting the battery.

The cell 80 may be a wound cell structure, for example, the cell 80 may include at least one positive electrode sheet, at least one negative electrode sheet, and at least one separator layer between the positive electrode sheet and the negative electrode sheet. The positive plate and the negative plate respectively protrude towards the shell to form a positive pole lug and a negative pole lug. In one example, the positive electrode sheet, the separator layer and the negative electrode sheet are sequentially stacked and wound on each other to form a winding type cell structure. In another example, the positive electrode sheet, the separator layer and the negative electrode sheet are sequentially crossed and superposed to form a laminated cell structure.

As shown in fig. 2, in an exemplary embodiment of the present disclosure, the battery may include a first tab 104 and a second tab 105, the first tab 104 being configured as a positive electrode of the battery, and the second tab 105 being configured as a negative electrode of the battery.

The positive plate of the battery cell comprises a positive base material (also called a positive conductive current collector), a positive active material, a first tab 104 and the like. The positive electrode substrate may be a metal foil, the positive electrode metal foil may be an aluminum foil, etc., and for example, the first tab 104 may be welded to the aluminum foil. The positive electrode substrate may be an electrolytic aluminum foil having a thickness of 10 to 40 μm. The positive electrode active material may be a sheet made of one or more of lithium cobaltate, lithium manganate, lithium iron phosphate, and nickel cobalt manganic acid (also referred to as ternary material) which are commonly used in the art, and the material of the positive electrode active material is not limited by the present disclosure. The positive electrode active material may be coated on the front and back surfaces of the positive electrode substrate.

The negative plate of the battery comprises a negative substrate (also called a negative conductive current collector), a negative active material, a second tab 105 and the like. The negative electrode substrate may be a metal foil, the negative electrode metal foil may be a copper foil, and for example, the second tab 105 may be welded to the copper foil. The negative electrode substrate may be an electrolytic copper foil having a thickness of 7 to 15 μm. The negative active material is prepared by mixing a negative active material carbon material or non-carbon material with a binder and an additive. For example, the material can be carbon negative electrode material, alloy negative electrode material, tin-based negative electrode material, lithium-containing transition metal nitride negative electrode material, nanoscale material, nanometer negative electrode material, and the like. The present disclosure does not limit the material of the negative electrode layer. The negative electrode active material may be coated on the front and back surfaces of the negative electrode substrate.

In the present disclosure, the first tab 104 may be an aluminum (Al) tab. The second tab 105 may be a nickel (Ni) tab.

As shown in fig. 2 and fig. 3, in an exemplary embodiment of the present disclosure, the battery cell 80 may further include: a blank foil region 50 and an active material region 60, the active material region 60 may be disposed adjacent to the blank foil region 50, and the second end of the tab 10 is connected to the blank foil region 50.

The positive plate or the negative plate of the battery is provided with a blank foil area (also called a reserved blank area), and the blank foil area is an area of the positive base material or the negative base material which is not coated with the positive active material or the negative active material. The first tab 104 may be laser or ultrasonic welded to the positive electrode substrate in the void foil area. The second tab 105 may be spot welded to the negative substrate in the void foil area by a spot welder.

In the present disclosure, a first tab glue may be further disposed on the first tab 104, and the first tab glue may be located outside the battery cell. A second tab adhesive is arranged on the second tab 105, and the second tab adhesive is located outside the battery cell, wherein the first tab adhesive and the second tab adhesive are different in color. By the arrangement, the anode and the cathode can be judged according to different colors in the production and manufacturing process, and the production efficiency is improved.

In the present disclosure, the separator of the battery is a polymer separator with micropores for separating the positive electrode sheet and the negative electrode sheet, and may be made of a polymer functional material having a nano-scale microporous structure. For preventing the occurrence of short circuit due to the contact between the positive electrode tab and the negative electrode tab, and for allowing the electrolyte ions to pass therethrough and blocking the electrons from passing therethrough. The isolating layer can be polyolefin microporous membrane, polyethylene felt, glass fiber felt, superfine glass fiber paper, etc. commonly used in the field. The present disclosure does not limit the material of the isolation layer.

The lithium ion battery can also comprise an organic electrolyte which plays a role in transporting ions between the positive plate and the negative plate, the organic electrolyte can be a carbonate solvent dissolved with lithium hexafluorophosphate, and the polymer uses a gel electrolyte.

The working principle of the lithium ion battery is as follows: when the battery is charged, lithium ions are generated on the positive plate of the battery, the positive active substance generates the lithium ions, and the generated lithium ions pass through the electrolyte and pass through the small holes on the isolating membrane to move to the negative plate. The carbon used as the base material of the negative electrode has a layered structure and a plurality of micropores, so that lithium ions reaching the negative electrode are inserted into the micropores of the carbon layer, and the more lithium ions are inserted, the higher the charge capacity is. Similarly, when the battery is discharged (i.e., during use of the battery), lithium ions embedded in the negative carbon layer are extracted, pass through the electrolyte again and pass through the pores in the separator and move back to the positive electrode. The more lithium ions returned to the positive electrode, the higher the discharge capacity. The battery capacity is generally referred to as the discharge capacity.

As shown in fig. 3, in an exemplary embodiment of the present disclosure, the flexible buffer region 102 may be located outside the cell. Due to the arrangement, the bending or twisting space of the flexible buffer area 102 is larger, so that a better buffer effect can be provided, and the quality of the battery can be further improved.

In an exemplary embodiment of the present disclosure, the battery may further include a protection plate, which may be coupled to the first end of the tab 10.

In the disclosure, the protection board may be an integrated circuit board that mainly protects the rechargeable lithium battery, and the protection board is configured to facilitate controlling the charging and discharging process, monitoring the charging and discharging conditions of the battery, optimizing the charging and discharging procedures of the battery, and protecting the battery.

The protection plate may include various control parts, precision resistors, auxiliary devices, etc., such as MOS (metal oxide semiconductor), NTC (Negative Temperature Coefficient), memory, PTC (Positive Temperature Coefficient), etc. The control device can control the MOS switch to be switched on under all normal conditions, so that the battery cell is communicated with an external circuit, and when the voltage of the battery cell or the loop current exceeds a specified value, the control device immediately (tens of milliseconds) controls the MOS switch to be switched off, so that the safety of the battery cell is protected. The NTC can reduce the resistance value when the ambient temperature rises, and the electric device or the charging device can be used for timely reacting and controlling the internal interruption to stop charging and discharging. The memory is usually a single-wire interface memory, stores information such as battery types and production dates, and can play a role in traceability and application limitation of products.

The PTC device is generally referred to as a PTC, and the PTC in the battery pack can prevent the occurrence of high-temperature discharge and unsafe large current of the battery. PTC is a very important component in a battery pack product, and plays an important role in the safety of a battery, and its own performance and quality are also important factors in the performance and quality of a battery pack.

Through the device, the protection board can be provided with an overcharge protection circuit, an overdischarge protection circuit, a charge-discharge temperature protection circuit, a short-circuit protection circuit and the like for protecting the battery cell.

Based on the same concept, the present disclosure also provides a terminal including the battery as in any one of the preceding embodiments. Fig. 4 is a schematic structural diagram illustrating a terminal according to an exemplary embodiment, and as shown in fig. 4, the terminal 20 may include a display screen 30, and a battery may be disposed at a back surface of the display screen 30, covered by a battery cover, and disposed inside a battery compartment.

In the present disclosure, the flexible buffer zone of the tab is arranged in the middle of the tab. The both ends of utmost point ear can be used for the welding, particularly, and the one end of utmost point ear can weld on the pole piece of electric core, and the other end of utmost point ear can weld external consumer or battery protection board. Such setting, when the battery removes or rocks, the displacement takes place for electric core, under this kind of condition, because the setting that flexible buffer set up, flexible deformation can take place for flexible buffer, can effectively cushion the pulling force, consequently can not drag the welding part of utmost point ear to avoid taking place the problem that the welding point foil material is torn and is leaded to utmost point ear to drop. Therefore, the quality of the battery is improved, the quality of the terminal can be improved, and therefore the use experience of a user and the competitiveness of a product are improved.

It is understood that the tab, the battery and the terminal provided by the embodiments of the present disclosure include corresponding hardware structures and/or software modules for performing the respective functions in order to realize the functions. The disclosed embodiments can be implemented in hardware or a combination of hardware and computer software, in combination with the exemplary elements and algorithm steps disclosed in the disclosed embodiments. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

It is understood that "a plurality" in this disclosure means two or more, and other words are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be further understood that the terms "first," "second," and the like are used to describe various information and that such information should not be limited by these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the terms "first," "second," and the like are fully interchangeable. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.

It will be further understood that the terms "central," "longitudinal," "lateral," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present embodiment and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation.

It will be further understood that, unless otherwise specified, "connected" includes direct connections between the two without the presence of other elements, as well as indirect connections between the two with the presence of other elements.

It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the scope of the appended claims.

Claims (10)

1. A tab for a battery, the tab comprising:

one or more welding zones at the ends of the tabs;

and the flexible buffer area is positioned in the middle of the lug and is configured to divide the lug into more than two areas.

2. The tab as claimed in claim 1, comprising:

the flexible buffer area comprises one of conductive flexible rubber, conductive fiber cloth and conductive carbon cloth.

3. A tab as claimed in claim 1 or 2, comprising:

a first weld region at a first end of the tab;

a second weld region at a second end of the tab, the first end being disposed opposite the second end;

the compliant buffer region is located between the first and second bond pads.

4. The tab as claimed in claim 3, comprising:

and the tab glue is positioned between the first welding area and the flexible buffer area.

5. A battery, comprising:

an electric core;

two or more tabs according to any one of claims 1 to 4, one end of the tabs being disposed inside the cell.

6. The battery according to claim 5,

the flexible buffer zone is located outside the cell.

7. The battery of claim 6, further comprising a protective plate coupled to the first end of the tab.

8. The battery of claim 6, wherein the cell comprises:

a region of empty foil;

and the active material area is arranged adjacent to the empty foil area, and the second end of the tab is connected with the empty foil area.

9. The battery of claim 8, wherein the battery comprises:

the first tab is configured as the positive electrode of the battery, a first tab glue is arranged on the first tab, and the first tab glue is positioned on the outer side of the battery core;

a second tab configured as a negative electrode of the battery, wherein a second tab glue is arranged on the second tab and positioned outside the battery core,

the first tab glue and the second tab glue are different in color.

10. A terminal, characterized in that it comprises a battery according to any one of claims 5 to 9.

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