KR19980075539A - Battery pole plate and its manufacturing method - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery electrode plate, in order to improve the strength of the battery electrode plate having a plurality of holes and having tabs on one side thereof, and to suppress the dropping of the active material to prevent degradation of battery performance. It is formed inwardly at predetermined intervals from each corner of, so that the amount of active material filled in the peripheral holes is equal to the central holes.

Description

Battery pole plate and its manufacturing method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery plate, and more particularly, to a battery plate and a method for manufacturing the same, which can improve the strength of the plate and suppress the dropping of the active material generated during punching.

In general, a battery is a device that directly converts chemical energy of an active material into electrical energy by electrochemical oxidation and reduction, and serves as a medium for the flow of a cathode, a cathode, and an electron. The electrolyte solution is an essential component.

Such batteries are classified into a number of types according to active materials used for electrodes, but are more representative of primary batteries capable of only discharging and secondary batteries capable of charging as well as discharging.

In recent years, with the development of various cordless devices and electric vehicles, secondary batteries have progressed remarkably fast, and batteries which have succeeded in environmental protection as well as smaller, lighter and higher energy density are being developed and marketed one after another.

The high energy density refers to the degree to which more electric energy can be generated within a limited capacity, and for this purpose, efforts to improve active materials used for the positive electrode and the negative electrode are continued, and more than the capacity of the limited electrode plate. The method which can fill an active material is also researched.

As a result of this research, nickel-hydrogen, lithium, solar cells, and the like are being developed and marketed one after another. Also, as shown in FIG. 4, a tab 2 for electrical connection to the outside is formed on one side. In order to increase the filling amount of the active material and improve the binding property, the electrode plate 10a having a plurality of holes 4 formed therein is used.

In the manufacturing method of the electrode plate 10a, a plurality of holes 4 are formed in a metal plate and made into a current collector, then a metal having corrosion resistance and electrical conductivity is plated, and then the active material is filled and punched into a predetermined shape. We manufacture in large quantities.

However, since the conventional electrode plate is punched without considering a plurality of holes formed in the metal plate, a plurality of grooves are formed along each corner of the punched electrode plate, which not only weakens the strength of the electrode plate but also fills in the groove. The dropped active material is dropped, resulting in a decrease in battery performance.

Therefore, the present invention has been invented to solve the above problems, an object of the present invention is to maintain the strength of the punched electrode plate well, and to prevent the fall of the active material to prevent the degradation of the battery performance And to provide a method of manufacturing the same.

In order to realize this, the present invention provides a current collector having a plurality of holes formed therein for suppressing the filling of the active material and the dropping of the filled active material, and a tab for charging the active material in the current collector and providing electrical energy to one side. The formed battery plate, characterized in that the cargo mass filled in the peripheral holes among the plurality of holes is the same as the central holes.

The method for manufacturing a rectangular battery negative electrode plate includes a current collector manufacturing process of manufacturing a current collector by forming a predetermined pattern continuous with a plurality of holes in a metal plate; A plating process of plating a metal containing electrical conductivity and corrosion resistance on the current collector; An active material charging process of filling an active material having electrical conductivity and binding property to the current collector plated with the metal; A rolling step of filling the current collector filled with the active material at high density by rolling to form a negative electrode plate; It comprises a punching process for punching in a predetermined shape, including a predetermined pattern formed on the negative electrode plate one by one.

The battery electrode plate manufactured by the above-described method has an active material filled in the peripheral holes because a plurality of holes formed to suppress the application of the active material and the falling off of the applied active material are positioned at predetermined intervals at each corner of the electrode plate. The amount is the same as that of the center side holes, the strength of each corner of the electrode plate is improved, and the dropping of the active material generated when the electrode plate is punched out can be suppressed.

1 is a plan view of a battery electrode plate according to the present invention.

2 is a plan view of a current collector according to the present invention;

3 is a perspective view showing a current collector manufacturing process according to the present invention;

5 is a plan view of a battery electrode plate conventionally used.

Next, the most preferred embodiment of the battery electrode plate and its manufacturing process according to the present invention will be described in detail with reference to the drawings.

1 to 3 show a battery pole plate 10 and a manufacturing method thereof according to the present invention, the pole plate 10 is a rectangular metal plate 6 having a predetermined thickness to provide electrical energy to one side to the outside. The tab 2 is formed.

The above-mentioned pole plate 10 is formed with a plurality of holes 4 inwards at predetermined intervals from each corner in order to more efficiently apply the active material and to suppress the falling off of the applied active material.

In addition, the electrode plate 10 is plated with a metal having excellent corrosion resistance and electrical conductivity in order to prevent corrosion due to electrolyte and electrochemical reaction and to improve electrical conductivity. In the present invention, nickel, which may meet the above conditions, is used. However, other metals may be used depending on the type or performance of the battery.

The nickel plated electrode plate 10 is filled with the above-mentioned plurality of holes 4 and the active material causing an electrochemical reaction is applied to both surfaces.

In the present embodiment, as the active material, the hydrogen-absorbing alloy powder used for the negative electrode plate of the nickel-hydrogen secondary battery is coated, but other active materials may be used depending on the type of battery or the electrode plate.

In the manufacturing method of the battery pole plate 10 made as described above, the current collector 8 is formed by first forming a continuous pattern (indicated by a dashed-dotted line in FIG. 2) using a plurality of holes 4 in the metal plate 6. A current collector manufacturing process for manufacturing the same is performed.

As shown in FIG. 3, the metal plate 6 having a predetermined size is continuously moved at regular intervals using the conveyor device 22, and the metal plate 6 drills a plurality of holes to form a predetermined pattern. When the device 24 is reached, the conveyor device 22 pauses.

At this time, the perforation device 24 descends to be in close contact with the metal plate 6 and at the same time make a plurality of holes in a predetermined pattern to make the metal plate 6 into the current collector 8, and then rise to an initial position, and the perforation device 24. Is completely returned to the initial position, immediately along the conveyor device 22 the current collector 8 is moved to the next process.

As described above, since the current collector 8 is formed by forming a plurality of holes 4 in the metal plate 6 as described above, it is necessary to prevent corrosion and improve electrical conductivity in order to use the electrode plate 10. .

To this end, a plating process of plating nickel containing electrical conductivity and corrosion resistance on the current collector 8 is performed.

The nickel-plated current collector 8 is filled with an active material that substantially causes an electrochemical reaction in the above-described plating process, and is completed as the electrode plate 10. The powder-like hydrogen storage alloy used for the negative electrode plate of the nickel-hydrogen battery as the active material. An active material filling step of filling the powder is carried out, followed by a rolling step in order to fill the current collector 8 with the powdery hydrogen-occluded alloy at a higher density.

The current collector 8 becomes the pole plate 10 by the rolling process described above. Finally, the pole plate 10 is completed by the punching process of punching a predetermined shape by including a predetermined pattern formed on the pole plate 10. .

The battery pole plate 10 manufactured by the above-described method has a plurality of holes 4 formed for filling more active materials while improving the binding property of the charged hydrogen-absorbing alloy powder. Since it is positioned inwardly at intervals, the amount of active material filled in the peripheral holes 4 is the same as the central holes 4, and the edge of the electrode plate 10 has an improved strength and punching process. It is possible to suppress the dropping of the active material due to.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

According to the present invention constructed and operated as described above, since a plurality of holes formed to improve the charging and binding of the active material in the pole plate of the battery is located inside at a predetermined distance from each corner of the pole plate, the peripheral hole The amount of active material filled in the field becomes the same as that of the center side holes, and the strength of the edge of the electrode plate is improved, and at the same time, the dropping of the active material generated at the time of punching can be suppressed, thereby preventing the performance of the battery.

Claims (2)

In the current collector having a plurality of holes formed therein for suppressing the filling of the active material and the falling off of the filled active material, and the battery electrode plate formed with a tab for charging the active material in the current collector, to provide electrical energy to one side, A battery plate characterized in that the cargo mass filled in the peripheral holes (4) among the plurality of holes (4) is the same as the central holes (4). A current collector manufacturing step of forming a current collector 8 by forming a constant pattern continuous with a plurality of holes 4 in the metal plate 6; A plating process of plating a metal containing electrical conductivity and corrosion resistance on the current collector 8; An active material charging process of filling an active material having electrical conductivity and binding property with the current collector 8 plated with metal; A rolling step of filling the current collector 8 filled with the active material at high density by rolling to form a pole plate 10; A method for manufacturing a battery pole plate comprising a punching step of punching in a predetermined shape by including a predetermined pattern formed on the pole plate (10) one by one.