JPH01656A - Sealed alkaline storage battery - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sealed alkaline storage battery used as a power source for cordless telephones and other electrical equipment and devices.

(Conventional Technique #) In conventional sealed alkaline storage batteries, the volume and capacity of the negative electrode plate are larger than the volume and capacity of the positive electrode plate, and these positive and negative electrode plates are polymerized and wound through a seven-arm rotor. A group of rolled electrode plates that can be rotated to create a design is housed in a cylindrical container, and the opening of the container is sealed with a lid. It is something.

(Problems to be Solved by the Invention) The conventional sealed alkaline storage battery described above can support rapid charging due to the gas absorption performance of the negative electrode plate during charging, but cannot achieve a high capacity.

(Means for Solving the Problems) The present invention provides a sealed alkaline storage battery that is capable of rapid charging and has a high capacity that cannot be achieved with conventional sealed alkaline storage batteries. This is a sealed alkaline storage battery, in which the negative electrode plate and the positive electrode plate are polymerized and wound through a seven-layer rotor, and a group of wound electrode plates is housed in a cylindrical container, and the opening of the container is sealed with a lid. The volume of the negative plate is equal to or smaller than the volume of the positive plate, and the thickness of the negative plate is 0.5 mm or less.

(Example) Next, examples of the present invention will be described in detail.

Ni on a 0.1-thick nickel-plated steel perforated plate
A paste-like mixture mainly consisting of powder is applied and sintered to form a predetermined porous substrate, which is then used to manufacture the positive electrode plate.
It is immersed in a Nl salt aqueous solution, and in the case of negative electrode plate production, it is immersed in a Cd salt aqueous solution.

A positive electrode plate and a negative electrode plate are respectively manufactured by depositing an active material within the patterned holes of the respective substrates. In this case, as shown in Table 1 below, the height of the positive and negative electrode plates is kept constant, but the length and thickness are varied, and the amount of active material filled in the positive and negative plates is also varied. After placing these positive and negative electrode plates, the volume ratio and active material amount ratio of these positive and negative electrode plates are changed and combined in various ways, and the electrode plates are twisted through a cenocerator made of warped nylon fabric to form various wound electrode plate groups. Then, each sealed alkaline storage battery was placed in a container of the same size in a tight fit. In this case, the amount of active material is 20% Ni(OH) on the positive electrode plate, and Cd(OH)2 on the negative electrode plate.
is the amount of

"Capacity" in Table 1 is 0 after charging for 15 hours with αICA.
．． This is the value when discharged at 2 CA. "Internal pressure" is the value after 1.5 hours of charging with IOA.

To measure internal pressure, open the top seal of the battery, place it in a pressure measurement container, and convert the internal pressure of the gas generated during charging into the pressure increase in the battery's internal volume.

This is the value obtained by

As shown in Table 1, as shown in Example 1 of the present invention and 2.3, the ratio of the volume of the positive electrode plate to the volume of the negative electrode plate? 1 or less, that is, contrary to conventional batteries, by making the volume of the negative plate equal to or smaller than the volume of the positive plate and at the same time making the thickness of the negative plate 0.5- or less. , significant ta
It has been found that an increase in capacity and a decrease in internal pressure can be obtained.

The reason for this effect is not fully clear, but by reversing the volume ratio of the positive and negative electrode plates from the conventional one and setting the body dt of the positive electrode plate to be relatively large, it is possible to increase the capacity. Furthermore, by setting the thickness of the negative electrode plate to 0.5 or less, the volume can be significantly reduced, and the effective surface area can be reduced to 1eR? By increasing the size, gas absorption is promoted,
It seems that it enables quick charging.

(Effect of the invention) According to the present invention, the volume of the negative electrode plate is equal to or much smaller than the volume of the positive electrode plate, and the thickness of the negative electrode plate is 15 or less. Since the batteries are housed and sealed in a battery container as a group, rapid charging is possible and a sealed alkaline storage battery with a higher capacity than conventional batteries can be obtained.

Claims (1)

[Claims] 1. In a sealed alkaline storage battery in which a group of wound electrode plates formed by polymerizing and winding a negative electrode plate and a positive electrode plate through a separator is housed in a cylindrical container, and the opening surface of the container is sealed with a lid, the volume of the negative electrode plate is A sealed alkaline storage battery characterized in that the volume of the positive electrode plate is equal to or smaller than the volume of the positive electrode plate, and the thickness of the negative electrode plate is 0.5 mm or less.