JPH048610Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention mainly relates to a lead-acid battery plate used as a power source for starting and lighting an automobile engine.

Prior art and its problems Expandable grids have been dramatically improved compared to conventional cast grids. Furthermore, Pb-Ca alloys and Pb-Low Sb alloys reduce self-discharge and eliminate the need for water replenishment, making them maintenance-free, and in recent years have become especially popular as maintenance-free batteries.

However, there are also problems with the expanded grid. That is, most of these types of storage batteries have the disadvantage that during use, the positive electrode plate expands (hereinafter referred to as gross) and the positive electrode plate comes into contact with the lower surface of the negative electrode plate strap, resulting in a short circuit and a shortened lifespan. The gloss phenomenon of the positive electrode plate is considered as follows.

During use of the battery, the temporary grid corrodes. At this time, the electrode plate is stretched upward due to the stress caused by the volume change that occurs when lead becomes lead oxide and the volume change of the paste, the volume change due to charging and discharging of the corroded layer on the surface of the grid, and the stress caused by the volume change of the paste. It can be done. This crosses the separator and comes into contact with the sponge lead on the negative electrode plate, causing a short circuit. In even more severe cases, the upper end of the elongated positive electrode plate may come into contact with the lower surface of the negative electrode plate group strap, causing a short circuit and the like, resulting in a shortened lifespan.

Purpose of the invention The present invention improves the structure of the lattice that makes up the expandable electrode plate for lead-acid batteries, thereby creating a structure that suppresses the gross phenomenon of the positive electrode plate within the electrode plate height range. It provides a lead-acid battery with a long life.

Structure of the Device In order to achieve the above object, the present invention is an expandable electrode plate for a lead-acid battery having inclined ribs 7, 8 and lattice portions A, B, wherein the inclined ribs 7, 8 are arranged in rows a. It has inclined ossicles 7 and B-row inclined ossicles 8, wherein the A-row inclined ossicles 7 are arranged in parallel in the upward right direction, and the B-row inclined ossicles 8 are arranged in parallel in the right downward direction. The lattice parts A and B are active material-filled parts surrounded by the inclined ossicles 7 and 8, and the lattice parts A and B are active material-filled parts surrounded by the inclined ossicles 7 and 8, and the lattice parts A and B are active material-filled parts surrounded by the inclined ossicles 7 and 8, and
consists of a lattice part A in which the upper angle at which the and the b-row inclined ossicles 8 intersect is α, and a lattice part B in which α' is smaller than α, and the lattice part B, which is α', is inclined in an oblique direction. They are characterized by being lined up in at least one row.

Example An embodiment of the present invention will be described based on the drawings.

Reference numeral 1 denotes a positive electrode plate manufactured by filling an active material 3 into an expanded grid body 2 made of Pb-Cd or Pb-Low Sb alloy. 4 is the upper rib of the lattice body 2;
5 is the lower rib. Reference numeral 6 indicates an ear portion, and 7 indicates an a-row inclined ossicle consisting of inclined ossicles a ₁ to a ₁₁ arranged in parallel in the upward right direction. Reference numeral 8 denotes a b-row inclined ossicle, which is composed of inclined ossicles b ₁ to b ₁₁ arranged in parallel in the downward right direction, connecting the a ₁ to _{a 11} rows. 8' denotes inclined bones 8 having different inclination angles, for example, A, B, and B shown in FIG.
These are connecting ossicles in areas 2 and 3.

Note that the upper angle at which the a-row inclined ossicles 7 and the b-row slanted ossicles 8 intersect is defined as α, and the active material-filled portion surrounded by these ossicles 7 and 8 is defined as a lattice portion A. Also, a
The intersecting angle between the row-slanted ossicles 7 and the connecting ossicles 8' is α', and the active material-filled portion surrounded by these ossicles 7 and 8' is defined as a lattice portion B. 9 is an electrode plate group, 10 is a negative electrode plate group strap, and 11 is a separator.

By establishing the relationship α>α' in the configuration as described above, the elongation due to grossness is dispersed and suppressed in the lateral direction in each small bone 8'. That is, by providing at least one row of lattice portions B in the diagonal direction of one lattice body, elongation due to gloss can be suppressed.

Effects of the invention As described above, in the present invention, in addition to the area where the intersecting angle of the inclined ossicles of the expandable electrode plate is α, that is, the lattice part A, the area where the intersecting angle is smaller than α, that is, the lattice part B, is provided in an oblique direction. Providing them in a row suppresses gloss and prevents the entire electrode plate from becoming glossy.

Therefore, the storage battery using the electrode plate according to the present invention can prevent short circuits due to gross and provide a maintenance-free battery with long life and reliability, so its industrial value is extremely large. .

[Brief explanation of drawings]

FIG. 1 is a front view of an electrode plate according to the present invention, FIG. 2 is a front view of a lattice body according to the invention, and FIG. 3 is a front view of a group of conventional electrode plates showing a deformed state when glossed. 2... Expandable lattice body, 4... Upper rib, 5... Lower rib, 7... A-row inclined ossicle, 8...
...B row inclined ossicle, A... Lattice part with intersection angle α, B
...The lattice part with the intersection angle α'.

Claims (1)

[Claims for Utility Model Registration] An expanded type electrode plate for a lead-acid battery having inclined ossicles 7, 8 and lattice portions A, B, wherein the slanted ossicles 7, 8 are arranged in the a-row slanted ossicles 7 and the b-row slanted ossicles. The A-row inclined ossicles 7 are arranged in parallel in an upward right direction, and the B-row inclined ossicles 8 are arranged in parallel in a right downward direction. The lattice parts A and B are active material-filled parts surrounded by the inclined ossicles 7 and 8, and the lattice parts A and B are active material-filled parts surrounded by the inclined ossicles 7 and 8, and
consists of a lattice part A in which the upper angle at which the and the b-row inclined ossicles 8 intersect is α, and a lattice part B in which α' is smaller than α, and the lattice part B, which is α', is inclined in an oblique direction. Expandable electrode plates for lead-acid batteries, characterized in that they are arranged in at least one row.