JPS6074360A - Manufacture of lead storage battery - Google Patents

Abstract

PURPOSE:To prevent any internal short circuits between plates as well as any separation of the active material of the plate entirely by injecting a synthetic resin made of the same material as that for separators over the entire surface of a plate group and forming exhaust holes in the top surface of the thus formed body. CONSTITUTION:After plural numbers of positive and negative plates are stacked with separators interposed, a positive and a negative strap 7 and 6 are connected to the thus formed body while applying a given pressure from its both sides thereby making a plate group. Next, while a pressure is applied to the plate group, a synthetic resin is injected over the entire surface of the plate group to form an insulating coat 11 thereby unifying the insulating coat 11 and the separator layers. After the injection molding, exhaust holes 15 are formed to facilitate gas exhaustion during charge and discharge. Since the insulating coat 11 is made of the same material as that for the separators, there is no possibility that the pressure applied to the plate group decreases after the assembly of a lead storage battery. In addition, no short circuits between the plates as well as no separation of the active material of the plate are caused entirely.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a lead-acid battery, particularly a cathode absorption type sealed lead-acid battery, in which a lead-acid battery is used which prevents internal short circuit between the electrode plates and drop-off of the electrode plate active material. The purpose is to obtain storage batteries.

In general, a cathode absorption type sealed lead-acid battery has a structure in which the oxygen generated from the anode plate 1 during charging is absorbed into the cathode plate 2, reacts with the cathode active material, and prevents the gas from escaping to the outside. It is. Conventionally, the structure of this type of lead-acid battery consists of a required number of cathode plates 2. It is called a retainer for the purpose of impregnating and retaining the electrolyte in each anode plate 1 and preventing contact short circuit between the negative and anode electrodes, and the cathode plate is made of glass fiber or synthetic resin fiber in the form of a mat (non-woven fabric) as the separator plate 3. 2. Sandwiched between the anode plates 1 and the cathode plates 2. ra
Is this intended to prevent contact short circuits between the electrode plates 1 and to prevent the active material of the anodes Vi and l from falling off by pressing and sandwiching the cathode plate 2 and the anode plate l due to the cushioning properties of the separator plate 3? , since the peripheral edge of each electrode plate is exposed, the anode ff1
The active material of 1 separates from the electrode plate during charging and discharging and separates from the separator plate 3.
Lead is dissolved as lead ions in the electrolytic solution impregnated into the separator 3, and when electrolyzed, it precipitates on the cathode plate 2, and this precipitated lead gradually grows and extends into a dendritic shape, bypassing the periphery ll[Ii of the separator 3. As a result, the anode plate lI reaches the anode plate, and the anode plate eventually contacts and short-circuits. If this happens, the voltage of the lead-acid battery will drop rapidly and it will completely lose its function as a lead-acid battery. However, such a short-circuit phenomenon at the peripheral edge of the electrode plate will cause the upper edge of the electrode group, It can occur on both sides and the bottom side. For these reasons, it is practical to isolate either the anode plate 1 or the cathode plate 2 in a bag shape and temporarily store them in advance to form a group of electrode plates, but the work of packing the electrode plates into a bag is extremely complicated. This was done in order to completely prevent high manufacturing costs and the inevitable disadvantages of internal short-circuiting between the electrode plates and falling off of the electrode plate active material. Both side edges and the lower bottom surface, that is, the entire outer peripheral edge of the electrode plate group, are injection molded using synthetic resin of the same material as the isolated temporary, and an exhaust hole is bored in the upper edge surface. The present invention provides a cathode absorption type sealed lead-acid battery having a structure in which a storage battery is assembled using a group of electrode plates.

The present invention will be explained.

1 is an anode plate, 2 is a cathode plate, and 3 is an isolation piece made of synthetic resin fiber molded into a mat shape (non-woven fabric), which is interposed between the cathode plate 2 and the anode plate 1. Reference numeral 4 denotes a cathode strap in which a plurality of cathode plates 2 are bundled together by ears 5 and connected; 6, a cathode column 97 planted on the cathode strap 4 includes a plurality of anodes F;
an anode strap which focuses and connects i and r with ears 8; 9 an anode column planted on the upper surface of the anode strap 7;
0 is a group of electrode plates formed by stacking a plurality of cathode plates 2 and anode plates 1 alternately via isolators 3 and converging them with a cathode strap 4 and an anode strap 7; 11 is an upper edge surface of the electrode plate group 10; 12. Both side edge surfaces 13. An insulating cover 15 is made of the same material as the isolation material 3 and integrated with the isolation material 3 by injection molding on each of the lower bottom edge portions 14, and 15 is an exhaust hole formed in the upper edge surface 12.

The present invention provides a cathode plate 2. Pressure force is applied from both sides of a plurality of bipolar plates with isolation plates 3 interposed between the anode plates 1, and the plate group formed by connecting the cathode straps 4 and the anode straps 7 with the placed group pressurized is assembled. Furthermore, while maintaining the group pressing force, an insulating liquid alIIf-11 is injected onto the entire peripheral surface of the pole Ffi and the group to form an insulating liquid alIIf-11, and the insulating coating 11 and the separator layer are integrated. For standardization, the upper edge surface 121 is formed so that one or more exhaust holes 15 extend four times.

When an exhaust hole 15 is formed after molding and the electrode plate group 10 is used as a storage battery, this serves as an exhaust port for exhaust during charging and discharging.

As described above, in the present invention, an insulating coating is injection molded over the entire rkJI of the outer circumferential surface of the S plate groove, exclusive of the exhaust hole, under group pressure, and then inserted into the battery case. Since one storage battery is assembled, and the insulating cover is made of the same material as the isolation material, there is a concern that the group pressing force will decrease after assembly, but it also has a grammar-like effect.

(Since short circuits between the υ plates and falling off of the plate active material are completely eliminated, the life of lead-acid batteries is greatly extended. The volumetric efficiency can be improved. (3) The lower bottom edge force f is coated, making the electrode plate feet unnecessary and reducing the amount of lead used. (4) A state in which pressing force is applied to the electrode plate group. lps
Since it is stored in a tank, it is easy to store the tank, and it is possible to maintain a constant pressurized state at all times to obtain uniform performance of four lead moss tanks.

As mentioned above, the present invention has extremely great practical value, such as reduction in materials and man-hours, and improvement in performance and life.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a group of electrode plates showing a conventional lead-acid battery, and FIG. 2 is a perspective view of a group of electrode plates showing an embodiment of the lead-acid battery of the present invention. 1 is an anode plate, 2 is a cathode plate, 3 is an isolation plate, 12 is an upper edge surface, 15 is an exhaust hole patent applicant

Claims (1)

[Claims] The outer periphery of the electrode plate group, which is assembled with a separator interposed between the negative and anode plates, is injection molded using synthetic resin of the same material as the separator and integrated with the separator. Place the electrode plate group with the exhaust hole on the upper surface part 1 and attach it to the battery case 1.
A method for manufacturing a lead-acid battery characterized by storing the battery.