Negative plate of nickel-zinc battery

Abstract

The utility model relates to the technical field of nickel-zinc batteries, and discloses a nickel-zinc battery negative plate, which comprises a current collector, a first active material layer arranged at the top end of the current collector, a second active material layer arranged at the bottom end of the current collector, a first conductive layer arranged at the top end of the first active material layer, and a second conductive layer arranged at the bottom end of the second active material layer. A second conducting layer is arranged at the bottom end of the second active material layer, a first lead groove and a second lead groove are formed in the two sides of the interior of the current collector, and a first limiting piece is fixedly connected to the bottom end of the first conducting layer. According to the nickel-zinc battery negative plate, the lead can penetrate through the first lead groove and the second lead groove reserved in the current collector, and the lead penetrates through the negative plate, so that the energy density of the battery can be improved, and the discharge power of the battery in use is improved; the first active material layer and the second active material layer on the current collector are uniformly distributed, so that the conductive strength can be improved, the function of enhancing the conductive strength is realized by the structure, and the problem of poor conductive strength is solved.

Description

Technical Field

[0001] This utility model relates to the field of nickel-zinc battery technology, specifically to a nickel-zinc battery negative electrode sheet. Background Technology

[0002] Nickel-zinc batteries are a new type of battery that can replace nickel-metal hydride batteries. The negative electrode of the battery usually refers to an electrode sheet with a high potential that contains active materials that undergo a reduction reaction during discharge.

[0003] Battery negative electrode plates typically have a layered structure. The negative electrode material of a battery negative electrode plate includes active materials and conductive additives. When using common battery negative electrode plates, poor discharge performance or poor conductivity can affect the stability of the entire battery.

[0004] For cylindrical nickel-zinc battery cells, the theoretical capacity design of the negative electrode is much higher than that of the positive electrode. Typically, the widths of the positive and negative electrodes are similar, but the negative electrode is longer. Therefore, the outermost layer of the cell assembly is usually the active layer of the negative electrode, primarily composed of zinc oxide (ZnO), which is directly electrically connected to the stainless steel cylindrical cup of the battery. It is evident that, lacking the corresponding positive electrode active material Ni(OH)₂, the outermost negative electrode active layer typically does not participate in electrochemical reactions. The outermost ZnO layer does not contribute to the battery's discharge capacity, resulting in a waste of ZnO active material and internal battery space. Furthermore, since ZnO is a semiconductor material, the outermost active layer has poor conductivity, severely affecting electron transport during charging and discharging, leading to a decrease in the rate performance of the nickel-zinc battery.

[0005] There is an urgent need for a nickel-zinc battery negative electrode to address the technical defects mentioned above. Utility Model Content

[0006] The purpose of this invention is to provide a nickel-zinc battery negative electrode sheet to solve the problem of poor conductivity mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a nickel-zinc battery negative electrode sheet, comprising a current collector, a first active material layer disposed at the top of the current collector, a second active material layer disposed at the bottom of the current collector, a first conductive layer disposed at the top of the first active material layer, a second conductive layer disposed at the bottom of the second active material layer, a first lead groove and a second lead groove disposed on both sides inside the current collector, a first limiting piece fixedly connected to the bottom of the first conductive layer, a second limiting piece fixedly connected to the top of the second conductive layer, a first limiting groove fixedly connected to the top of the first active material layer, and a second limiting groove fixedly connected to the top of the second active material layer.

[0008] As a further technical solution of this utility model, the first lead groove and the second lead groove are connected.

[0009] As a further technical solution of this utility model, the first lead groove and the second lead groove are in the shape of a "T".

[0010] As a further technical solution of this utility model, an aqueous adhesive is provided at the bottom end of the first conductive layer and the top end of the second conductive layer, and a reserved groove is provided inside the first active material layer and the second active material layer.

[0011] As a further technical solution of this utility model, the water-based adhesive is embedded in the interior of the reserved groove for bonding and fixation.

[0012] As a further technical solution of this utility model, the current collector is internally provided with a conductive agent, a thickener, and deionized water, etc.

[0013] As a further technical solution of this utility model, the first limiting piece is embedded in the first limiting groove in a fitted and bonded manner.

[0014] As a further technical solution of this utility model, the second limiting piece is embedded in the inside of the second limiting groove and bonded for fixation.

[0015] Compared with the prior art, the beneficial effects of this utility model are: this nickel-zinc battery negative electrode not only achieves the function of enhancing conductivity, but also achieves the function of easy positioning;

[0016] (1) By setting a current collector, a first active material layer, a second active material layer, a first lead groove and a second lead groove, the first lead groove and the second lead groove reserved inside the current collector can be used for through leads. Through leads on the negative electrode sheet can improve the energy density of the battery, thereby improving the discharge power used by the battery. The uniform distribution of the first active material layer and the second active material layer on the current collector can improve the conductivity. This structure realizes the function of facilitating the enhancement of conductivity. It can effectively improve the electrical contact between the cell assembly and the stainless steel cylindrical cup, and improve the discharge capacity and rate performance of the nickel-zinc battery.

[0017] (2) By providing a first active material layer, a first conductive layer, an aqueous adhesive and a reserved groove, the aqueous adhesive embedded in the reserved groove can improve the bonding strength, and the aqueous adhesive can improve the bonding stability of the first active material layer and the first conductive layer, thereby improving the overall safety of the battery negative electrode sheet.

[0018] (3) By providing a first limiting piece, a first limiting groove, a second limiting groove, and a second limiting piece, the active material layer and the conductive layer can be bonded by an aqueous adhesive. During the bonding process between the active material layer and the conductive layer, the first limiting piece is embedded inside the first limiting groove, and the second limiting piece is embedded inside the second limiting groove for fixation, which can improve the limiting firmness of the active material layer and the conductive layer. This structure realizes the functions of easy and firm connection and limiting connection. Attached Figure Description

[0019] Figure 1 This is a frontal cross-sectional view of the present invention.

[0020] Figure 2 This is a top view of the second conductive layer structure of this utility model;

[0021] Figure 3 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0022] Figure 4 This is a partial front view of the structure of the first active layer of this utility model.

[0023] In the figure: 1. Current collector; 2. First active material layer; 3. Second active material layer; 4. First conductive layer; 5. Second conductive layer; 6. Water-based adhesive; 7. First limiting piece; 8. First limiting groove; 9. Second limiting groove; 10. Second limiting piece; 11. Reserved groove; 12. First lead groove; 13. Second lead groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4An embodiment of this utility model provides a nickel-zinc battery negative electrode sheet, comprising a current collector 1, a first active material layer 2 disposed at the top of the current collector 1, a second active material layer 3 disposed at the bottom of the current collector 1, a first conductive layer 4 disposed at the top of the first active material layer 2, a second conductive layer 5 disposed at the bottom of the second active material layer 3, a first lead groove 12 and a second lead groove 13 disposed on both sides inside the current collector 1, a first limiting piece 7 fixedly connected to the bottom of the first conductive layer 4, a second limiting piece 10 fixedly connected to the top of the second conductive layer 5, a first limiting groove 8 fixedly connected to the top of the first active material layer 2, a second limiting groove 9 fixedly connected to the top of the second active material layer 3, and a conductive agent, a thickener and deionized water disposed inside the current collector 1;

[0026] The first lead groove 12 and the second lead groove 13 are connected, and the first lead groove 12 and the second lead groove 13 are in a "T" shape;

[0027] Specifically, such as Figure 1 and Figure 3 As shown, the first lead groove 12 and the second lead groove 13 reserved inside the current collector 1 can be used for through leads. Through leads on the negative electrode sheet can improve the energy density of the battery, thereby increasing the discharge power used by the battery. The uniform distribution of the first active material layer 2 and the second active material layer 3 on the current collector 1 can improve the conductivity.

[0028] A water-based adhesive 6 is provided at the bottom of the first conductive layer 4 and the top of the second conductive layer 5. A reserved groove 11 is provided inside the first active material layer 2 and the second active material layer 3. The water-based adhesive 6 is embedded in the reserved groove 11 for bonding and fixation.

[0029] Specifically, such as Figure 1 and Figure 4 As shown, the active material layer and the conductive layer can be bonded together by water-based adhesive 6. The water-based adhesive 6 can be embedded in the reserved groove 11 to improve the bonding strength.

[0030] The first limiting piece 7 is embedded inside the first limiting groove 8 and is fixed by fitting and bonding; the second limiting piece 10 is embedded inside the second limiting groove 9 and is fixed by fitting and bonding.

[0031] Specifically, such as Figure 1 , Figure 2 and Figure 4 As shown, during the bonding process between the active material layer and the conductive layer, the first limiting piece 7 is embedded inside the first limiting groove 8, and the second limiting piece 10 is embedded inside the second limiting groove 9 to fix it, which can improve the firmness of the limiting between the active material layer and the conductive layer.

[0032] Working principle: In use, the first lead groove 12 and the second lead groove 13 reserved inside the current collector 1 can be used to pass through the lead wire. Passing through the lead wire on the negative electrode sheet can improve the energy density of the battery, thereby increasing the discharge power of the battery. The uniform distribution of the first active material layer 2 and the second active material layer 3 on the current collector 1 can improve the conductivity. The water-based adhesive 6 embedded in the reserved groove 11 can improve the bonding firmness. The water-based adhesive 6 can improve the bonding stability of the first active material layer 2 and the first conductive layer 4. The first limiting piece 7 is embedded in the first limiting groove 8, and the second limiting piece 10 is embedded in the second limiting groove 9 for fixation, which can improve the limiting firmness of the active material layer and the conductive layer. This structure realizes the functions of easy and firm connection and limiting connection.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A nickel-zinc battery negative electrode, comprising a current collector (1), characterized in that: The current collector (1) has a first active material layer (2) at its top and a second active material layer (3) at its bottom. The first active material layer (2) has a first conductive layer (4) at its top and a second conductive layer (5) at its bottom. The current collector (1) has a first lead groove (12) and a second lead groove (13) on both sides inside. The first conductive layer (4) has a first limiting piece (7) fixedly connected to its bottom. The second conductive layer (5) has a second limiting piece (10) fixedly connected to its top. The first active material layer (2) has a first limiting groove (8) fixedly connected to its top. The second active material layer (3) has a second limiting groove (9) fixedly connected to its top.

2. The nickel-zinc battery negative electrode sheet according to claim 1, characterized in that: The first lead groove (12) and the second lead groove (13) are connected.

3. The nickel-zinc battery negative electrode sheet according to claim 1, characterized in that: The first lead groove (12) and the second lead groove (13) are in the shape of a "T".

4. The nickel-zinc battery negative electrode sheet according to claim 1, characterized in that: A water-based adhesive (6) is provided at the bottom of the first conductive layer (4) and the top of the second conductive layer (5), and a reserved groove (11) is provided inside the first active material layer (2) and the second active material layer (3).

5. The nickel-zinc battery negative electrode sheet according to claim 4, characterized in that: The water-based adhesive (6) is embedded inside the pre-reserved groove (11) for bonding and fixation.

6. The nickel-zinc battery negative electrode sheet according to claim 1, characterized in that: The current collector (1) contains conductive agent, thickener and deionized water.

7. The nickel-zinc battery negative electrode sheet according to claim 1, characterized in that: The first limiting piece (7) is embedded in the first limiting groove (8) and fixed by bonding.

8. The nickel-zinc battery negative electrode sheet according to claim 1, characterized in that: The second limiting piece (10) is embedded in the second limiting groove (9) and fixed by bonding.

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