Graphene nickel-metal hydride battery

Abstract

A graphene nickel-metal hydride battery comprises a shell body, a positive plate, a negative plate, a diaphragm, an insulation buckle, a surface cover, a first conductive part and a second conductive part, the positive plate, the negative plate and the diaphragm which are wound into a whole are arranged in the shell body, one positive plate is connected to the surface cover through the first conductive part, and the other negative plate is connected to the surface cover through the second conductive part. Wherein a negative plate is connected to the shell main body through a second conductive part, the positive plate comprises a first carrier, a first functional layer and a positive electrode material layer, the negative plate comprises a second carrier, a second functional layer and a negative electrode material layer, the first functional layer and the second functional layer are both made of graphene, and the negative electrode material layer is made of graphene. The first carrier is coated with the first functional layer, the first functional layer is clamped between the positive electrode material layer and the first carrier, the second carrier is coated with the second functional layer, and the second functional layer is clamped between the negative electrode material layer and the second carrier. According to the utility model, the charge-discharge efficiency is effectively improved, and the cycle life of the battery is prolonged.

Description

Technical Field

[0001] This utility model relates to a battery structure, and more particularly to a graphene nickel-metal hydride battery. Background Technology

[0002] With the escalating global energy crisis and increasingly severe environmental pollution, the search for efficient and clean energy storage technologies has become a key focus of scientific research. Among numerous energy storage technologies, rechargeable batteries stand out due to their high energy density and recyclability. Nickel-metal hydride (NiMH) batteries, as a mature rechargeable battery technology, offer advantages such as large capacity and environmental friendliness, and are widely used in portable electronic devices, electric vehicles, and aerospace. However, traditional NiMH batteries still suffer from low charge-discharge efficiency and short cycle life, limiting their further application and development. Utility Model Content

[0003] Therefore, it is necessary to provide a graphene nickel-metal hydride battery to address the shortcomings of existing technologies.

[0004] A graphene nickel-metal hydride battery includes a casing, a positive electrode, a negative electrode, a separator, an insulating buckle, a cover, a first conductive part, and a second conductive part. The separator is disposed between the positive and negative electrode, which are spaced apart. The positive electrode, negative electrode, and separator, wound into a single unit, are disposed within the casing. The cover is mounted on the insulating buckle, which is installed on the casing. One positive electrode is connected to the cover via the first conductive part, and one negative electrode is connected to the casing via the second conductive part. The positive electrode includes a first carrier, a first functional layer, and a positive electrode material layer. The negative electrode includes a second carrier, a second functional layer, and a negative electrode material layer. Both the first and second functional layers are made of graphene. The first functional layer is coated on the first carrier and sandwiched between the positive electrode material layer and the first carrier. The second functional layer is coated on the second carrier and sandwiched between the negative electrode material layer and the second carrier.

[0005] In one embodiment, the first carrier is a copper foil and the second carrier is a steel strip.

[0006] In one embodiment, the insulating buckle is provided with a groove, and the cover includes a plate body and a positive electrode cap connected to the middle of the upper end face of the plate body. During assembly, the outer periphery of the plate body of the cover is engaged with the side wall of the groove of the insulating buckle, and the bottom of the plate body abuts against the bottom of the groove.

[0007] In one embodiment, the insulating buckle is further provided with a downward through hole in the middle of the groove bottom, and the cover also includes a snap protrusion connected to the bottom of the plate body. The snap protrusion extends into the through hole and is installed with an interference fit with the hole wall of the through hole.

[0008] In one embodiment, the outer circumferential surface of the insulating buckle is inserted into the shell body and has an interference fit with the inner surface of the shell body.

[0009] The beneficial effects of this graphene nickel-metal hydride battery are as follows: by setting a first functional layer on the positive electrode plate and a second functional layer on the negative electrode plate, and both the first and second functional layers are made of graphene, the conductive area can be increased. By utilizing the excellent conductivity and thermal conductivity of graphene, the charging and discharging efficiency can be effectively improved, and the cycle life of the battery can be increased. Attached Figure Description

[0010] Figure 1 This is a cross-sectional view of the graphene nickel-metal hydride battery of this utility model;

[0011] Figure 2 This is a cross-sectional view of the positive electrode of the graphene nickel-metal hydride battery of this utility model;

[0012] Figure 3 This is a cross-sectional view of the negative electrode of the graphene nickel-metal hydride battery of this utility model. Detailed Implementation

[0013] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0014] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0015] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0016] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0018] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0019] Please see Figures 1 to 3This utility model provides a graphene nickel-metal hydride battery, including a shell body 10, a positive electrode 50, a negative electrode 60, a separator 40, an insulating buckle 20, a cover 30, a first conductive part 70, and a second conductive part 80. The positive electrode 50, the negative electrode 60, and the separator 40 are wound into a whole using a winding process. The separator 40 is disposed between the positive electrode 50 and the negative electrode 60, and the positive electrode 50 and the negative electrode 60 are spaced apart. The positive electrode 50 and the negative electrode 60 are wound into a whole. A positive electrode 50 and a negative electrode 60 are disposed inside the shell body 10. The positive electrode 50, the negative electrode 60 and the separator 40 are wound into a whole to form a battery pack. The cover 30 is mounted on the insulating buckle 20, which is installed on the shell body 10. One positive electrode 50 is connected to the cover 30 through the first conductive part 70, and one negative electrode 60 is connected to the shell body 10 through the second conductive part 80. The cover 30 and the shell body 10 serve as the positive and negative electrodes of the graphene nickel-metal hydride battery, respectively.

[0020] The insulating buckle 20 is used to separate the face cover 30 and the shell body 10 and to support the face cover 30. The insulating buckle 20 has a groove 21, and a through hole 22 extending downwards is further provided in the middle of the bottom of the groove 21. The face cover 30 includes a plate body 31, a positive electrode cap 32 connected to the middle of the upper end face of the plate body 31, and a locking protrusion 33 connected to the bottom of the plate body 31. During assembly, the outer periphery of the plate body 31 of the face cover 30 is locked onto the side wall of the groove 21 of the insulating buckle 20, and the bottom of the plate body 31 abuts against the bottom of the groove 21. The locking protrusion 33 extends into the through hole 22 and is installed with an interference fit with the hole wall of the through hole 22. The outer circumferential surface of the insulating buckle 20 is locked into the opening of the shell body 10, and the outer circumferential surface of the buckle is interference fit with the inner surface of the shell body 10.

[0021] The positive electrode 50 includes a first carrier 51, a first functional layer 52, and a positive electrode material layer 53. The first functional layer 52 is coated on the first carrier 51 and sandwiched between the positive electrode material layer 53 and the first carrier 51. The first carrier 51 is copper foil, the first functional layer 52 is made of graphene, and the main component of the positive electrode material layer 53 is a mixture of nickel hydroxide and electrolyte.

[0022] The negative electrode 60 includes a second carrier 61, a second functional layer 62, and a negative electrode material layer 63. The second functional layer 62 is coated on the second carrier 61 and sandwiched between the negative electrode material layer 63 and the second carrier 61. The second carrier 61 is a steel strip, the second functional layer 62 is made of graphene, and the main component of the positive electrode material layer 53 is a mixture of hydrogen storage alloy powder and electrolyte.

[0023] The beneficial effects of this graphene nickel-metal hydride battery are as follows: by setting a first functional layer 52 on the positive electrode plate and a second functional layer 62 on the negative electrode plate, the first functional layer 52 and the second functional layer 62 are both made of graphene. The first functional layer 52 and the second functional layer 62 can increase the conductive area. By utilizing the excellent conductivity and thermal conductivity of graphene, the charging and discharging efficiency can be effectively improved, and the cycle life of the battery can be increased.

[0024] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0025] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A graphene nickel-metal hydride battery, characterized in that, The device includes a shell body, a positive electrode sheet, a negative electrode sheet, a separator, an insulating buckle, a cover, a first conductive part, and a second conductive part. The separator is disposed between the positive and negative electrode sheets, which are spaced apart. The positive and negative electrode sheets, along with the separator, are wound into a single unit and disposed within the shell body. The cover is mounted on the insulating buckle, which is installed on the shell body. One positive electrode sheet is connected to the cover via the first conductive part, and one negative electrode sheet is connected to the shell body via the second conductive part. The positive electrode sheet includes a first carrier, a first functional layer, and a positive electrode material layer. The negative electrode sheet includes a second carrier, a second functional layer, and a negative electrode material layer. Both the first and second functional layers are made of graphene. The first functional layer is coated on the first carrier and sandwiched between the positive electrode material layer and the first carrier. The second functional layer is coated on the second carrier and sandwiched between the negative electrode material layer and the second carrier.

2. The graphene nickel-metal hydride battery according to claim 1, characterized in that, The first carrier is copper foil, and the second carrier is steel strip.

3. The graphene nickel-metal hydride battery according to claim 1, characterized in that, The insulating buckle has a groove, and the cover includes a plate body and a positive cap connected to the middle of the upper end face of the plate body. During assembly, the outer periphery of the plate body of the cover is stuck on the side wall of the groove of the insulating buckle, and the bottom of the plate body abuts against the bottom of the groove.

4. The graphene nickel-metal hydride battery according to claim 3, characterized in that, The insulating buckle has a downward through hole in the middle of the groove bottom. The cover also includes a snap protrusion connected to the bottom of the plate body. The snap protrusion extends into the through hole and is installed with an interference fit with the hole wall.

5. The graphene nickel-metal hydride battery according to claim 3, characterized in that, The outer circumferential surface of the insulating buckle is inserted into the shell body and has an interference fit with the inner side of the shell body.

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