Button cell

Abstract

The utility model discloses a button cell which comprises a shell which comprises a positive pole shell and a negative pole cover, the anode shell is bowl-shaped; the negative electrode cover is in a cover shape and covers the positive electrode shell; the button cell further comprises an isolating membrane which is arranged in the shell and divides the space in the shell into a positive electrode cavity and a negative electrode cavity; the positive electrode cavity is a space defined by the positive electrode shell and the isolating membrane, and the negative electrode cavity is a space defined by the negative electrode cover and the isolating membrane; the positive electrode combined cake is accommodated in the positive electrode cavity; the positive electrode combined cake comprises a battery positive electrode active matter Ag2O; the positive electrode electrofluid is accommodated in the positive electrode cavity; the positive electrode combined cake is infiltrated in the positive electrode electrofluid; and the negative electrode combined material is accommodated in the negative electrode cavity. According to the utility model, the isolating membrane and the sealing ring are arranged to effectively prevent short circuit; and the outer curled edge of the negative electrode cover is wrapped by the sealing ring, and the opening end of the positive electrode shell is inwards folded to press the top of the sealing ring, so that layer-by-layer lamination is realized, and the shell of the battery is firmer, safer and more reliable.

Description

Technical Field

[0001] The utility model relates to a button battery. Background Art

[0002] As people prioritize life and health, the demand for medical devices is growing. Large medical devices are inconvenient to carry and use on the go, leading to the emergence of portable medical devices. Medical devices require power, and portable or swallowable medical devices require compact batteries. Furthermore, most medical devices require high-frequency, high-pulse power supplies, and these power supplies must be safe.

[0003] Small batteries with high pulse performance on the market include alkaline button batteries and button-type lithium-ion batteries. Both of these can explode under abnormal conditions (such as short circuits), emitting harmful gases and making them unsuitable for use in medical equipment.

[0004] Therefore, developing a button battery with high pulse performance and safety and reliability has become a problem that the industry needs to solve. Utility Model Content

[0005] The main purpose of the utility model is to provide a button battery to solve the deficiencies in the prior art.

[0006] In order to achieve the above main objectives, the present invention provides a button battery, which includes a housing, the housing including a positive electrode housing and a negative electrode cover; the positive electrode housing is bowl-shaped; the negative electrode cover is cover-shaped and covers the positive electrode housing; the button battery further includes:

[0007] The separator is disposed inside the housing to divide the space inside the housing into a positive electrode cavity and a negative electrode cavity; the positive electrode cavity is the space enclosed by the positive electrode shell and the separator, and the negative electrode cavity is the space enclosed by the negative electrode cover and the separator;

[0008] The positive electrode assembly cake is contained in the positive electrode cavity; the positive electrode assembly cake contains the battery positive electrode active material Ag2O;

[0009] A positive electrode electrolyte is contained in the positive electrode cavity; the positive electrode composite cake is immersed in the positive electrode electrolyte;

[0010] The negative electrode composition material is contained in the negative electrode cavity.

[0011] In the utility model, the positive electrode shell can be the positive electrode of the battery, and the negative electrode cover can be the negative electrode of the battery, which outputs high pulse current and has good safety performance.

[0012] In the present invention, the positive electrode composite cake is doped with Ni oxide. AgNiO2 is first selected as an additive, and then the main active material of the battery, Ag2O, is added. A small amount of electrolytic manganese dioxide and conductive graphite are added. After being fully mixed by high-speed dispersing and mixing equipment and adding an appropriate amount of high-purity water, the above materials are pressed into tablets, crushed and screened, and then placed in a mold and pressed up and down to form a positive electrode active cake. Batteries produced using this cake have excellent high pulse performance and high battery safety.

[0013] Ni improves conductivity and prevents oxidation after storage. Ag2O is a strong oxide in powder form with high chemical activity, making it extremely unstable in batteries. Ni doping changes the hierarchical structure of Ag2O. Under the electrode, AgNiO2 has an active discharge output. Adding AgNiO2 and MnO2 to the silver oxide positive electrode as dopants changes the positive electrode layer. AgNiO2 itself is conductive, and the addition of a small amount of conductive graphite makes the battery's positive electrode more capable of high-pulse discharge. Furthermore, Ag2O and AgNiO2 absorb hydrogen and oxygen. When the battery short-circuits, the gases generated by the internal reaction are absorbed, preventing the battery from exploding due to internal gas expansion and bursting through the outer shell.

[0014] In the present invention, the negative electrode composition material is in the form of paste or powder.

[0015] According to another embodiment of the present invention, a sealing ring is further included, which is located within the negative electrode cavity and has its bottom abutted against the edge of the separator. The sealing ring can cooperate with the separator to enhance the isolation effect and prevent short circuits.

[0016] According to another specific embodiment of the present invention, the sealing ring is annular, with a circle of accommodating grooves provided on its inner side, and its outer side is in contact with the inner side of the positive electrode shell.

[0017] According to another specific embodiment of the present invention, the separator is located at the waist of the positive electrode shell.

[0018] According to another embodiment of the present invention, the edge of the negative electrode cover is an outer curling edge, which is accommodated in the receiving groove of the sealing ring. Through this arrangement, the sealing ring can wrap around the edge of the negative electrode cover.

[0019] According to another specific embodiment of the present invention, the open end of the positive electrode shell is retracted inward to press the top of the sealing ring.

[0020] The utility model has the following beneficial effects:

[0021] The utility model effectively prevents short circuit by providing an isolation membrane and a sealing ring; the outer curling edge of the negative electrode cover is wrapped by the sealing ring, and the open end of the positive electrode shell is retracted inward to press the top of the sealing ring, thereby achieving layer-by-layer lamination, making the battery shell more solid, safe and reliable.

[0022] In order to more clearly illustrate the purpose, technical solutions and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic cross-sectional view of an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0026] This embodiment provides a button battery, such as Figure 1 As shown, it includes a shell, a separator 108, a positive electrode combination cake 107, a positive electrode electrolyte, a negative electrode combination material 110, and a sealing ring 109.

[0027] The housing includes a positive electrode shell 106 and a negative electrode cover 111 ; the positive electrode shell 106 is bowl-shaped; the negative electrode cover 111 is lid-shaped and covers the positive electrode shell 106 .

[0028] The separator 108 is arranged inside the shell, located at the waist of the positive electrode shell 106, dividing the space inside the shell into a positive electrode cavity and a negative electrode cavity; the positive electrode cavity is the space surrounded by the positive electrode shell 106 and the separator 108, and the negative electrode cavity is the space surrounded by the negative electrode cover 111 and the separator 108.

[0029] The positive electrode assembly cake 107 is housed within the positive electrode cavity; it contains the battery's positive electrode active material, AgO. The positive electrode electrolyte is housed within the positive electrode cavity; the positive electrode assembly cake is immersed in the electrolyte. The negative electrode assembly material 110 is housed within the negative electrode cavity. The positive electrode casing 106 serves as the battery's positive electrode, and the negative electrode cover 111 serves as the battery's negative electrode.

[0030] The sealing ring 109 is located inside the negative electrode cavity, with its bottom contacting the edge of the separator 108. The sealing ring 109 is annular, with a circle of accommodating grooves on its inner side and its outer side contacting the inner side of the positive electrode shell 106.

[0031] The edge of the negative electrode cover 111 is an outer curling edge, which is received in the receiving groove of the sealing ring 109. The open end 112 of the positive electrode shell 106 is retracted inwards, pressing the top of the sealing ring 109.

[0032] Although the present invention has been disclosed above with reference to specific embodiments, these embodiments are not intended to limit the scope of the present invention. Any person skilled in the art may make changes or modifications without departing from the scope of the present invention. Therefore, any equivalent changes or modifications made in accordance with the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A button battery comprising a housing, the housing comprising a positive electrode housing and a negative electrode cover; the positive electrode housing is bowl-shaped; the negative electrode cover is lid-shaped and covers the positive electrode housing; characterized in that: The button battery further comprises: a separator disposed within the housing to divide the space within the housing into a positive electrode cavity and a negative electrode cavity; the positive electrode cavity is the space enclosed by the positive electrode shell and the separator, and the negative electrode cavity is the space enclosed by the negative electrode cover and the separator; A positive electrode assembly cake is contained in the positive electrode cavity; the positive electrode assembly cake contains the battery positive electrode active material Ag2O; A positive electrode electrolyte, contained in the positive electrode cavity; the positive electrode composite cake is immersed in the positive electrode electrolyte; The negative electrode composition material is contained in the negative electrode cavity.

2. The button battery according to claim 1, wherein: It further includes a sealing ring, which is located in the negative electrode cavity and has a bottom that fits the edge of the isolation membrane.

3. The button battery according to claim 2, wherein: The sealing ring is annular, with a circle of accommodating grooves provided on its inner side and its outer side in contact with the inner side of the positive electrode shell.

4. The button battery according to claim 2, wherein: The separator is located at the waist of the positive electrode shell.

5. The button battery according to claim 3, wherein: The edge of the negative electrode cover is an outer curling edge, and the outer curling edge is accommodated in the accommodating groove of the sealing ring.

6. The button battery according to claim 4, wherein: The open end of the positive electrode shell is retracted inward to press the top of the sealing ring.

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