Button battery

Abstract

The present invention discloses a button battery, which is composed of a battery upper shell, a battery bottom shell and a battery core, wherein the battery core is accommodated in the battery upper shell, and the battery upper shell is buckled on the battery bottom shell; the battery upper shell is composed of a negative electrode steel sheet and an insulating ring body, and the insulating ring body is arranged on the negative electrode steel sheet, and the insulating ring body is used to wrap the entire battery core. The present invention is a button battery, which can save the process operation of injection molding on the side wall of the shell by changing the structure of the battery upper shell to a combination of a plastic side and a negative electrode steel sheet, compared with the existing button battery, thereby effectively achieving the effects of easy assembly, saving assembly steps and increasing insulation.

Description

Technical Field

[0001] The invention relates to the field of button batteries, and in particular to a button battery. Background Art

[0002] Common button batteries are classified into the following types according to their chemical composition: carbon, alkaline, zinc-silver oxide, zinc-air, lithium-manganese dioxide, nickel-cadmium rechargeable button batteries, nickel-metal hydride rechargeable button batteries, etc. If we look at the appearance, there is a distinction between single and stacked. In detail, carbon button batteries are the most common and the cheapest, and alkaline ones are a little more expensive, but the discharge effect is good. Both voltages are 1.5V, from alkaline AG1 to AG13, the nominal capacity ranges from about 15mAh to 140mAh. Suitable for microampere discharge requirements. Mostly used in calculators, electronic toys, hearing aids, lighters, watches, etc. In addition to being powered by single batteries, button batteries have also developed high-voltage batteries due to their small size - that is, stacking multiple button batteries.

[0003] In existing button batteries, generally after the upper shell and the lower shell are assembled, a sealing ring needs to be set in the gap between the upper shell and the lower shell so that the upper shell can be stably embedded in the lower shell. In order to achieve better sealing, it may be necessary to inject glue on the button battery with the assembled sealing ring. This method greatly increases the difficulty of assembling the button battery, makes the process more complicated, increases the time cost of assembly, and reduces the efficiency of assembly. Summary of the invention

[0004] The object of the present invention is to overcome the deficiencies in the prior art and to provide a button battery which is easy to assemble, saves assembly steps and can also increase insulation.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] A button battery, comprising a battery upper shell, a battery bottom shell and a battery core, wherein the battery core is accommodated in the battery upper shell, and the battery upper shell is buckled on the battery bottom shell;

[0007] The battery upper shell is composed of a negative electrode steel sheet and an insulating ring body, wherein the insulating ring body is arranged on the negative electrode steel sheet, and the insulating ring body is used to wrap the entire battery core.

[0008] In one of the embodiments, the battery bottom shell includes a positive electrode steel sheet and an insulating sleeve, and the insulating sleeve is arranged on the positive electrode steel sheet.

[0009] In one of the embodiments, a mounting cavity is provided in the insulating sleeve, and the battery upper shell and the battery inner core are accommodated in the mounting cavity so that the outer wall of the insulating ring body fits on the inner wall of the insulating sleeve.

[0010] In one embodiment, the battery bottom shell is a steel shell structure, and the battery upper shell and the battery core are accommodated in the steel shell structure so that the outer wall of the insulating ring body fits on the inner wall of the steel shell structure.

[0011] In one of the embodiments, a battery cell fixing cavity is opened in the insulating ring body, and the battery core is arranged in the battery cell fixing cavity.

[0012] In one of the embodiments, the insulating ring body is a PP insulating layer.

[0013] In one of the embodiments, the thickness of the insulating ring body is 0.2 mm to 0.5 mm.

[0014] In one embodiment, the battery core includes a soft-pack core, a positive electrode tab and a negative electrode tab, the soft-pack core is accommodated in the battery upper shell, one end of the positive electrode tab is arranged on the soft-pack core, and the other end of the positive electrode tab is welded to the battery bottom shell, one end of the negative electrode tab is arranged on the soft-pack core, and the other end of the negative electrode tab is welded to the negative electrode steel sheet.

[0015] In one of the embodiments, two first pole tab avoidance gaps are formed on the insulating ring body, and the two first pole tab avoidance gaps are symmetrically arranged with respect to each other.

[0016] In one of the embodiments, at least one second tab avoidance notch is formed on the battery bottom shell, and the second tab avoidance notch is aligned with one of the first tab avoidance notches.

[0017] The advantages and beneficial effects of the present invention compared to the prior art are as follows:

[0018] The present invention is a button battery. By changing the structure of the battery upper shell to a combination of a plastic side and a negative electrode steel sheet, compared with existing button batteries, the process operation of injection molding on the side wall of the shell can be saved, thereby effectively achieving the effects of easy assembly, saving assembly steps and increasing insulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a schematic structural diagram of a button battery according to one embodiment of the present invention;

[0021] Figure 2 for Figure 1 A schematic diagram of the structure of the battery upper shell of the button battery shown;

[0022] Figure 3 for Figure 1 A schematic structural diagram of a battery bottom shell of a button battery shown;

[0023] Figure 4 for Figure 1 A schematic diagram of the structure of the battery core of the button battery shown;

[0024] Figure 5 for Figure 1 A schematic structural diagram of a button battery from another perspective is shown;

[0025] Figure 6 for Figure 1 A schematic structural diagram of a button battery from another viewing angle is shown;

[0026] Figure 7 for Figure 1 A schematic structural diagram of a button battery according to another embodiment of the present invention is shown;

[0027] Figure 8 for Figure 1 A schematic structural diagram of a button battery according to another embodiment is shown. DETAILED DESCRIPTION

[0028] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0031] In existing button batteries, generally after the upper shell and the lower shell are assembled, a sealing ring needs to be set in the gap between the upper shell and the lower shell so that the upper shell can be stably embedded in the lower shell. In order to achieve better sealing, it may be necessary to inject glue on the button battery with the assembled sealing ring. This method greatly increases the difficulty of assembling button batteries, the process is more complicated, the time cost of assembly is increased, and the efficiency of assembly is reduced. In one embodiment, a button battery is composed of a battery upper shell, a battery bottom shell and a battery core, the battery core is accommodated in the battery upper shell, and the battery upper shell is buckled on the battery bottom shell; the battery upper shell is composed of a negative electrode steel sheet and an insulating ring body, the insulating ring body is arranged on the negative electrode steel sheet, and the insulating ring body is used to wrap the entire battery core. The battery bottom shell includes a positive electrode steel sheet and an insulating sleeve, and the insulating sleeve is arranged on the positive electrode steel sheet. In this way, by changing the structure of the battery upper shell to a combination of a plastic side and a negative electrode steel sheet, compared to existing button batteries, the process operation of injection molding on the side wall of the shell can be saved, thereby effectively achieving the effects of easy assembly, saving assembly steps and increasing insulation.

[0032] See also Figure 1 A button battery is composed of a battery upper shell 100, a battery bottom shell 200 and a battery core 300, wherein the battery core 300 is accommodated in the battery upper shell 100, and the battery upper shell 100 is buckled on the battery bottom shell 200.

[0033] It should be noted that the battery upper shell 100 and the battery bottom shell 200 are used to wrap the battery core 300, and the battery core 300 is used to provide power.

[0034] See also Figure 2The battery upper shell 100 is composed of a negative electrode steel sheet 110 and an insulating ring body 120. The insulating ring body is arranged on the negative electrode steel sheet, and the insulating ring body 120 is used to wrap the entire battery core 300. It should be noted that the negative electrode steel sheet 110 is used to fix the insulating ring body; the insulating ring body 120 is used to wrap the entire battery core 300, and the battery upper shell and the battery lower shell are insulated, that is, after being isolated from each other, the battery bottom shell and the battery upper shell will not be mutually conductive, and compared with the existing button battery, the process operation of injection molding on the side wall of the shell can be saved, so that the effect of easy assembly, saving assembly steps and increasing insulation can be effectively achieved.

[0035] See also Figure 3 In one embodiment, the battery bottom shell 200 includes a positive electrode steel sheet 210 and an insulating sleeve 220, and the insulating sleeve is disposed on the positive electrode steel sheet. It should be noted that the positive electrode steel sheet 210 is used to realize the positive electrode power output, and the insulating sleeve 220 is used to realize mutual insulation with the battery upper shell, and is used to be sleeved on the insulating ring 120 of the battery upper shell, so that the entire battery upper shell can be squeezed and fixed to each other, so that the battery assembly is more stable and reliable.

[0036] It should also be noted that the insulating sleeve is provided with a mounting cavity, and the battery upper shell and the battery core are accommodated in the mounting cavity, so that the outer wall of the insulating ring body is attached to the inner wall of the insulating sleeve. In this way, by providing the mounting cavity for placing the battery core, the battery core is protected, thereby extending the service life of the battery.

[0037] In another embodiment, the battery bottom shell is a steel shell structure, and the battery upper shell and the battery core are accommodated in the steel shell structure, so that the outer wall of the insulating ring body fits on the inner wall of the steel shell structure. In this way, by providing a shell with an entire steel structure, the battery upper shell can also be covered, and compared with a battery bottom shell with a plastic side wall, a battery bottom shell with a steel structure is more solid and has a better effect of protecting the battery.

[0038] It should be noted that the insulating ring body is provided with a battery core fixing cavity, and the battery core is arranged in the battery core fixing cavity. Thus, by providing the battery core fixing cavity, the entire battery upper shell and the battery core can be placed inside to protect the battery core.

[0039] It should be noted that the insulating ring body is a PP insulating layer. That is, the insulating ring body is a PP insulating material, and the insulating sleeve is also a PP insulating material. In this way, the insulation effect can be achieved, so that the battery will not have a short circuit.

[0040] It should be noted that the thickness of the insulating ring is 0.2 mm to 0.5 mm. Thus, by providing an insulating ring with a thickness of 0.2 mm to 0.5 mm, the inner core of the battery can be fixed on the one hand, and insulation can be provided to prevent short circuits on the other hand.

[0041] It is also necessary to note that, please refer to Figure 4 The battery core 300 includes a soft-pack core 310, a positive electrode tab 320 and a negative electrode tab 330. The soft-pack core is accommodated in the battery upper shell, one end of the positive electrode tab is arranged on the soft-pack core, and the other end of the positive electrode tab is welded to the battery bottom shell, one end of the negative electrode tab is arranged on the soft-pack core, and the other end of the negative electrode tab is welded to the negative electrode steel sheet. In this way, the power output function of the battery can be realized.

[0042] It can be understood that the existing button batteries are provided with positive electrode tabs and negative electrode tabs, and the positive electrode tabs and negative electrode tabs are arranged on both sides of the soft-pack battery cell assembly. Therefore, the upper positive electrode bottom shell needs to completely wrap the positive electrode tabs, negative electrode tabs and soft-pack battery cell assembly inside. Such a structure makes the overall structure of the button battery larger and cannot meet the miniaturized design requirements.

[0043] Please note that Figure 2 The insulating ring body 120 is provided with two first tab avoidance notches 121, and the two first tab avoidance notches are symmetrically arranged. Thus, by providing two first tab avoidance notches 121, the positive tab and the negative tab can be accommodated in the avoidance notches, thereby reducing the overall volume of the battery, making the overall structure of the button battery more compact while maintaining the battery capacity unchanged.

[0044] Please refer again to Figure 3 At least one second tab avoidance notch 230 is provided on the battery bottom shell 200, and the second tab avoidance notch is aligned with one of the first tab avoidance notches. Thus, by providing the second tab avoidance notch 230, after being aligned with the first tab avoidance notch, a tab accommodation area is formed. When the positive tab or the negative tab is arranged in the accommodation area, the tab can be conveniently led out, and the diameter of the steel shell can be reduced, thereby reducing the overall volume of the button battery.

[0045] Furthermore, in one embodiment, two second tab avoidance notches 230 are provided on the side wall of the battery bottom shell 200, and the two second tab avoidance notches are aligned with the two first tab avoidance notches, that is, when the battery upper shell is buckled on the battery bottom shell, the first tab avoidance notches are aligned with the second tab avoidance notches. It should be noted that when the first tab avoidance notches and the second tab avoidance notches are aligned, the positive tab and the negative tab can be respectively accommodated in the two aligned notches, that is, a part of the positive tab is accommodated in one aligned notch, and a part of the negative tab is accommodated in the other aligned notch. In this way, compared with the existing button battery without an opening on the shell, the button battery of the present invention can effectively reduce the shell size of the positive bottom shell, so that the button battery is smaller in size, simpler in structure, and easier to assemble.

[0046] Specifically, see Figure 4 and Figure 5 The negative electrode tab 330 includes a connecting piece 331 and a negative electrode welding piece 332. One end of the connecting piece is arranged on the soft-pack inner core, and the other end of the connecting piece is connected to the negative electrode welding piece. The connecting piece is accommodated in an opening in which the first tab avoidance notch and the second tab avoidance notch are aligned, and the negative electrode welding piece is exposed on the upper shell of the battery. It should be noted that the connecting piece 331 is used to connect the negative electrode tab in the soft-pack inner core, and can also play a role in fixing the negative electrode tab; the negative electrode welding piece 332 is used to lead out the negative electrode of the battery, and will be welded on the upper shell of the battery, playing a role in electrically connecting the soft-pack inner core and the upper shell of the battery. At the same time, the negative electrode welding piece is exposed on the negative electrode steel sheet, that is, the negative electrode tab is welded on the negative electrode steel sheet, and exposed outside the negative electrode steel sheet, which can realize the operation of conveniently welding the negative electrode tab.

[0047] It should also be noted that the connecting piece and the negative electrode welding piece are integrally formed. The connecting piece and the negative electrode welding piece are perpendicular to each other. In this way, by providing a vertical negative electrode ear, the negative electrode of the battery can be easily led out, and the integrally formed structure can effectively improve the structural stability.

[0048] See also Figure 4 and Figure 5The positive electrode tab 320 includes a bending piece 321 and a positive electrode welding piece 322. One end of the bending piece is used to connect to the soft-pack inner core, and the other end of the bending piece is connected to the positive electrode welding piece after being bent and extended, and the bending piece is accommodated in another opening where the first tab avoidance notch and the second tab avoidance notch are aligned, and the positive electrode welding piece is exposed on the battery bottom shell. It should be noted that the bending piece 321 is used to lead out the positive electrode of the battery, that is, the bending piece is used to connect the positive electrode piece in the soft-pack inner core, and can also play a role in fixing the positive tab; the positive electrode welding piece 322 is used to lead the positive electrode of the battery to the outside of the battery, that is, the positive electrode welding piece is set on the outside of the battery bottom shell to facilitate the welding operation of the positive tab.

[0049] It should also be noted that the bending sheet and the positive electrode welding sheet are integrally formed. Thus, by providing an integrally formed structure, the structural stability of the positive electrode tab can be improved.

[0050] It is understandable that the existing button batteries generally weld the positive pole ear to the bottom shell and the negative pole ear to the top shell. However, regardless of the bottom shell or the top shell, the existing pole ears are very soft and not hard enough, which makes it inconvenient to install and weld them when assembling the battery. In addition, after the existing top shell and bottom shell are assembled, they are prone to poor structural stability or insulation.

[0051] In one embodiment, please refer to Figure 6 The button battery further includes an upper steel sheet 400 and a lower steel sheet 500, wherein the upper steel sheet is used to be welded to the upper shell of the battery, and the lower steel sheet is used to be welded to the bottom shell of the battery. Thus, by providing the lower steel sheet, the positive electrode tab can be led out to avoid it being crushed during assembly, and the assembly is also convenient. Similarly, by providing the upper steel sheet, the negative electrode tab can be led out to avoid it being crushed during assembly, and the assembly is also convenient.

[0052] Furthermore, the upper steel sheet 400 is welded on the upper surface of the battery upper shell 100, and the lower steel sheet 500 is welded on the lower surface of the battery bottom shell 200. It should be noted that the upper steel sheet 400 is used to lead out the negative pole ear; the lower steel sheet 500 is used to lead out the positive pole ear, so that the pole ear can be led out for assembly, thereby facilitating assembly, and using the steel structure is equivalent to improving the hardness of the pole ear, which is convenient for subsequent plugging and assembly.

[0053] Specifically, see Figure 7The upper steel sheet 400 includes a first welding sheet 410 and a first external sheet 420. The first welding sheet 410 is disposed on the upper surface of the battery upper shell 100, and the first external sheet is connected to the first welding sheet. It should be noted that the first welding sheet 410 is used for welding on the steel shell, and the first external sheet 420 is used for connecting an external device or component.

[0054] It should be noted that the first welding sheet and the first external sheet are an integrally formed structure. The first welding sheet is welded to the upper surface of the battery upper shell 100 by resistance welding or laser welding. In this embodiment, the first welding sheet and the first external sheet are arranged perpendicular to each other. In this way, by setting an integrally formed structure, the structure is more stable and more convenient for welding operation.

[0055] See also Figure 8 The lower steel sheet 500 includes a second welding sheet 510 and a second external sheet 520. The second welding sheet is disposed on the upper surface of the battery bottom shell 200, and the second external sheet is connected to the second welding sheet. It should be noted that the second welding sheet is used to be welded on the steel shell, so as to fix the entire lower steel sheet 500; the second external sheet is used to connect external devices.

[0056] It should be noted that the second welding sheet and the second external sheet are an integrally formed structure. The second welding sheet is welded to the upper surface of the battery bottom shell 200 by resistance welding or laser welding. The second welding sheet and the second external sheet are arranged perpendicular to each other. In this way, by setting an integrally formed structure, the structure of the steel sheet can be made more stable and the welding can be more reliable.

[0057] The advantages and beneficial effects of the present invention compared to the prior art are as follows:

[0058] The present invention is a button battery. By changing the structure of the battery upper shell to a combination of a plastic side and a negative electrode steel sheet, compared with existing button batteries, the process operation of injection molding on the side wall of the shell can be saved, thereby effectively achieving the effects of easy assembly, saving assembly steps and increasing insulation.

[0059] The above-mentioned embodiments only express several embodiments of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A button battery, comprising a battery upper shell, a battery bottom shell and a battery core, wherein the battery core is accommodated in the battery upper shell, and the battery upper shell is buckled on the battery bottom shell; It is characterized in that The battery upper shell is composed of a negative electrode steel sheet and an insulating ring body, wherein the insulating ring body is arranged on the negative electrode steel sheet and is used to wrap the entire battery core; The battery bottom shell includes a positive electrode steel sheet and an insulating sleeve, and the insulating sleeve is arranged on the positive electrode steel sheet; The insulating sleeve is provided with an installation cavity, and the battery upper shell and the battery inner core are accommodated in the installation cavity, so that the outer wall of the insulating ring body is attached to the inner wall of the insulating sleeve; The battery bottom shell is a steel shell structure, and the battery upper shell and the battery core are accommodated in the steel shell structure, so that the outer wall of the insulating ring body is attached to the inner wall of the steel shell structure; A battery cell fixing cavity is provided in the insulating ring body, and the battery inner core is arranged in the battery cell fixing cavity; The insulating ring body is a PP insulating layer; The thickness of the insulating ring body is 0.2 mm to 0.5 mm; The battery core includes a soft-pack core, a positive electrode tab and a negative electrode tab, wherein the soft-pack core is accommodated in the battery upper shell, one end of the positive electrode tab is arranged on the soft-pack core, and the other end of the positive electrode tab is welded to the battery bottom shell, one end of the negative electrode tab is arranged on the soft-pack core, and the other end of the negative electrode tab is welded to the negative electrode steel sheet; The insulating ring body is provided with two first pole tab avoidance notches, and the two first pole tab avoidance notches are symmetrically arranged with respect to each other.

2. The button battery according to claim 1, characterized in that: At least one second tab avoidance notch is formed on the battery bottom shell, and the second tab avoidance notch is aligned with one of the first tab avoidance notches.

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