CN205543128U - Cylindrical nickel -hydrogen battery - Google Patents

Abstract

The utility model relates to a cylindrical nickel-hydrogen battery, comprising a steel shell (9), an electric core, an electrolyte in the steel shell, and the electric core consists of a positive plate (2) and a diaphragm (3) from the inside to the outside. 1. The negative electrode sheet (1) is wound in sequence, and there is no hydrogen storage alloy powder on the contact side of the negative electrode sheet (1) and the wall of the steel shell (9). Reduce costs and reduce waste of raw materials. At the same time, because there is no hydrogen storage alloy powder, the space vacated can be used to fill more powder at the front end of the positive electrode and the negative electrode to increase the volume specific capacity of the battery. In addition, the matrix steel strip after powder scraping is in direct contact with the inner wall of the steel case, which reduces the internal impedance of the battery.

Description

Cylindrical NiMH battery

technical field

The utility model relates to the field of nickel-hydrogen batteries, in particular to a cylindrical nickel-hydrogen battery.

Background technique

Cylindrical Ni-MH battery is a widely used Ni-MH battery, which has the characteristics of high energy, long life, and no pollution, so it is widely used.

The existing cylindrical Ni-MH battery structure is generally a nickel-plated steel or stainless steel single-layer battery case, a nickel-plated steel or stainless steel single-layer battery cap, and the battery cell is a positive electrode piece, a diaphragm, and a negative electrode piece from the inside to the outside. wound in sequence. Especially in the wet production process of the negative electrode sheet, the wet method is to uniformly coat the hydrogen storage alloy powder slurry on both sides of the steel strip, so that the powder is evenly distributed on both sides of the substrate to make the negative electrode sheet. The negative electrode and the positive electrode are separated by a diaphragm, and a cylinder is formed after winding. The outermost ring of the cylinder is the negative electrode, which is in direct contact with the inner wall of the steel shell. This part of the hydrogen storage alloy powder on the side of the negative electrode in contact with the inner wall of the steel shell hardly participates in the electrochemical reaction of the electrode, and does not play the role of the power supply capacity of the current, which leads to the waste of this part of the powder and also leads to the The waste of space is not conducive to the improvement of the capacity of the nickel metal hydride battery.

In view of the shortcomings of the existing traditional technology, it is necessary to further optimize the existing cylindrical Ni-MH battery to reduce material waste, reduce manufacturing costs, rationally utilize the internal space of the battery, and increase the volume-specific capacity of the battery.

Utility model content

One of the technical problems to be solved by the utility model is that the hydrogen storage alloy powder on the side where the negative plate of the existing cylindrical Ni-MH battery is in contact with the steel shell wall hardly participates in the electrochemical reaction of the electrode, resulting in waste of this part of the powder and waste of space; another problem is that existing batteries cannot work under extreme temperature conditions.

In order to solve the above problems, this law provides the following technical solutions:

. A cylindrical nickel-metal hydride battery, comprising a steel case, an electric core, an electrolyte in the steel case, and the described electric core is wound from the inside to the outside by a positive electrode sheet, a diaphragm, and a negative electrode sheet, and its characteristics That is, there is no hydrogen storage alloy powder on the side of the negative electrode sheet in contact with the steel shell wall.

Further, the negative electrode sheet is a steel strip substrate that scrapes off the hydrogen storage alloy powder on one surface of the wet sheet.

Compared with the prior art, the utility model has the beneficial effects that: there is no hydrogen storage alloy powder on the contact side of the negative plate and the steel shell wall, which reduces the cost and reduces the waste of raw materials. Moreover, the matrix steel strip after powder scraping is directly in contact with the inner wall of the steel shell, which reduces the internal impedance of the battery.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Figure 1 is a cross-sectional view of the structure of a cylindrical Ni-MH battery.

detailed description

In order to clearly disclose the technical solution of the utility model, further description will be made below in conjunction with the accompanying drawings. It should be understood that in the following description, terms such as "upper", "lower", "inner" and "outer" are only used to represent directions indicated with reference to the accompanying drawings.

As shown in Figure 1, it includes steel shell 9, electrolyte, negative electrode sheet 1, positive electrode sheet 2, and diaphragm 3) arranged in the steel shell 9) The diaphragm isolates the negative electrode sheet 1 and the positive electrode sheet 2, the middle gasket 4, the exhaust Hole 5, cap 6, sealing ring 7, tab 8. The hydrogen storage alloy powder on the side of the negative electrode sheet 1 in contact with the wall of the steel shell 9 is scraped off. The substrate steel belt after powder scraping is in direct contact with the inner wall of the steel case, which reduces the internal impedance of the battery.

What has been described above is only the principle and preferred embodiments of the present utility model. It should be pointed out that although the preferred embodiment of the utility model and the accompanying drawings are disclosed for the purpose of illustrating the utility model, those skilled in the art will not depart from the spirit and scope of the utility model and the appended claims , can be used for various substitutions, changes and modifications. Therefore, on the basis of the principle of the utility model, several other modifications made should also be regarded as the protection scope of the utility model.

Claims (3)

1. a cylinder-type nickel-metal hydride battery, including box hat (9), battery core, the electrolyte in box hat, described battery core from inside to outside by positive plate (2), barrier film (3), negative plate (1) sequential volume around forming, it is characterized in that, described negative plate (1) contacts on side without hydrogen bearing alloy powder with box hat (9) wall.

Cylinder-type nickel-metal hydride battery the most according to claim 1, it is characterised in that described negative plate (1) contacts with box hat (9).

Cylinder-type nickel-metal hydride battery the most according to claim 1, it is characterised in that the described steel strip substrate that negative plate (1) is the hydrogen bearing alloy powder on a face after striking off wet method pulling-on piece.