JPH041653Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a so-called retainer type storage battery in which a predetermined amount of electrolyte is impregnated and held in a group of electrode plates.

A conventional specific type storage battery is housed in a battery case by inserting the electrode plate group between both side walls of the battery case facing each other in the stacking direction, or by fixing the battery in a pressed state through a spacer. In general, the electrode plate group is accommodated with a gap provided in the width direction between the opposite side walls of the battery case. Therefore, due to the vibrations and shocks of the battery, the electrode plates are swayed in the width direction, and the initial state of the cathode and anode plates and the separator interposed therebetween, which are properly stacked in a straight line, is often distorted. , it shifts laterally and becomes misaligned,
There was concern that the movement of the separator could cause damage to both side edges and a short circuit between the cathode and anode plates, making it difficult to control the quality of the product in order to prevent misalignment.

The present invention provides a storage battery that eliminates such manufacturing troubles, and consists of a battery case 1 and a plate group 4.
The battery case 1 is formed with a case narrow part 1a whose lower part is narrower than the upper part, and the electrode plate group 4 includes a separator 4a, a cathode plate 4b, an anode plate 4c It has free side edges 4a1, 4a1 that protrude outward on both sides, and when stored in the battery case 1, the free side edges 4a1, 4a1 are bent to form bent side edges 4a1', 4a1'. As a result, it is fixed under narrow pressure within the narrow portion 1a of the battery case.

Next, one example of implementing the present invention will be explained with reference to the accompanying drawings.

Reference numeral 1 denotes a battery case consisting of a plurality of cell chambers 3 whose interior is partitioned by partition walls 2, and a group of electrode plates 4 is fixed in pressure contact with both side walls in the stacking direction within each cell chamber 3.

According to the present invention, as shown in FIG.
and the electrode plate group 4 accommodated therein are constructed in the following relationship.

That is, the widthwise side walls 55 of the battery case 1 have a width W ₁ smaller than the width W 1 of the fiber separator 4a such as glass fiber of the electrode plate group 4 housed therein, and the negative and anode plates 4b, Formed in the battery case narrow part 1a having a width W ₃ larger than the width W ₂ of 4c,
When the electrode plate group 4 is inserted into the narrow part 1a of the battery case,
The lower portions of the free side edges 4a1, 4a1 protruding on both sides of the separator 4a are bent by both side walls 55 of the narrow width portion 1a of the battery case, and the bent side edges 4
Connect the electrode plate group 4 to the narrow part 1 of the battery case via a1' and 4a1'.
The storage battery of the present invention is constructed by clamping and fixing the battery in a. In this way, even if the storage battery is subjected to horizontal shaking during transportation or use, the electrode plate group 4 will be able to maintain its lower part at the battery case narrow part 1a and the separator 4.
Bent side edges 4a1', 4a at the bottom of both sides of a
1', the impact on the electrode plates of the electrode plate group 4 is alleviated, and it is possible to hold them in their predetermined positions, thereby preventing short circuits due to lateral displacement of the electrode plates 4b, 4c, etc. This results in a stable storage battery.

In the above embodiment, the both side walls 55 in the width direction of the battery case 1 are designed to have a width W 4 at the upper part thereof which is larger than the width W ₁ of the separator 4a of the electrode plate group ₄ housed therein. Lower part and expansion side wall part 6
6 and extending vertically to the upper end, and inside the battery case wide part 1b, free side edges 4 on both sides of the separator 4a of the electrode plate group 4 are formed.
A gap 77 is left in which the upper portions of a1 and 4a1 can be accommodated without bending. Thus both free side edges 4a of the separator 4a
1, 4a1 is the inner wall of the battery case wide part 1b, that is, the upper inner surface of the both side walls 55 of the battery case 1, and the electrode plate group 4
Since the sides are open without being pressed and compressed, when an electrolytic solution is injected into this, the electrolytic solution is easily and quickly absorbed and retained well.

In this way, according to the present invention, the battery case narrow part 1a is provided at the bottom of the battery case 1 with the free side edges 4a1, 4a1 of the separator 4a protruding from both sides of the lower part of the electrode plate group 4 being bent. Since the electrode plate group 4 is fixed by pressing inside the separator 4a, the bent side edge 4 of the separator 4a is protected against lateral swinging and impact.
a1', 4a1' are held well and stably, improving the vibration resistance in the lateral direction, and since there is no movement of the bent side edges 4a1', 4a1' of the separator, the polarity of the electrode plate group is This has the effect of preventing short circuits due to misalignment between the plates.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of one example of the storage battery of the present invention;
The figure shows a sectional view taken along the line -- in FIG. 1... Battery case, 1a... Narrow width part of the battery case, 4... Electrode plate group, 4a... Separator, 4b... Cathode plate, 4
c... Anode plate, 4a1... Free side edge, 4a1'
...Folded side edge, 5... Side wall, 6... Expanded side wall, 7... Void.

Claims (1)

[Claims for Utility Model Registration] A storage battery having a battery case 1 and a plate group 4, wherein the battery case 1 is formed with a narrow part 1a whose lower part is narrower than the upper part; In the electrode plate group 4, the separator 4a is the cathode plate 4.
b. It has free side edges 4a1, 4a1 that protrude outward on both sides from the anode plate 4c, and when stored in the battery case 1, the free side edges 4a1, 4a1 are bent to form a bent side edge. 4a1' and 4a1' are the storage batteries fixed under narrow pressure within the narrow width part 1a of the battery case. Both side walls 5, 5 in the width direction of the battery case 1 have a width W 4 larger than the width W ₁ of the separator 4a of the electrode plate group ₄ housed therein at the upper part thereof, and a lower part thereof and an expanded side wall part 6. , 6 and extending vertically to the upper end, and inside thereof,
The storage battery according to claim 1, which has been registered as a utility model, and has gaps 7, 7 that can accommodate the upper parts of the free side edges 4a1, 4a1 protruding on both sides of the separator 4a of the electrode plate group 4 without bending them.