JPH041632Y2 - - Google Patents

Description

[Detailed explanation of the idea] Industrial use field The present invention relates to improvements in assembled batteries.

Conventional technologies and their problems Conventionally, lead-acid batteries, which are produced in 4V, 6V, 12V, etc. formats by integrating single cells or multiple cells, have been used in storage battery locomotives, electric forklifts, electric trolleys, electric vehicles, etc. An assembled battery is used, in which the required number of cells are stored in a storage box made of iron or the like, and each cell is electrically connected.

In such assembled batteries, in order to prevent insulation from deteriorating due to adhesion of water or electrolyte, or to make it easier to insert the batteries into the storage box when assembling the assembled batteries, the internal dimensions of the storage box are slightly enlarged and the storage box is A structure is adopted in which a plate-shaped spacer is inserted between the box and the storage battery.

This spacer is generally made by extrusion molding synthetic resin such as polypropylene or vinyl chloride resin into a flat plate, ribbed plate, or corrugated plate, or processed from a wooden board or square lumber.

Depending on the conditions of use, this kind of battery pack has the drawback that, because there is little friction between the spacers, some of the spacers may rise due to vibrations, etc. Also, in order to fix the spacers, adhesive tape or The use of adhesives has been considered, but there have been problems such as durability due to moisture from water or electrolyte and poor assembly workability of the assembled battery.

Means for Solving the Problems The present invention eliminates the above-mentioned drawbacks by attaching one end of a fixing plate made of a rust-proofed metal thin plate to the inner wall surface of a storage box containing a plurality of storage batteries. The spacer is welded or screwed and inserted between the storage battery and the inner wall of the storage box, and the upper end of the spacer is sandwiched between the fixing plate and the inner wall of the storage box.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 is a storage box made by welding iron plates.
Twelve 2V cells 2 are stored in the storage box, each cell is connected in series with a connector 7, and lead wires 6, 6' are connected to the positive and negative terminals 5, 5' of the cells at both ends. It is connected. In addition, as shown in FIGS. 1 and 3, a spacer 4 is arranged between the inner wall of the storage box 1 and the cell 2, and is made of a bendable metal such as mild steel or stainless steel with a thickness of about 0.2 to 1 mm. One end of a fixing plate made of a thin plate was welded or screwed to the inner wall of the storage box, the upper part of the spacer 4 was sandwiched between the other end of the fixing plate 3, and the cell battery 2 was housed to assemble the assembled battery. In this way, the fixing plates 3 were used at six locations in the storage box.

The spacers 4 in the above embodiment were extruded polypropylene sheets with a thickness of 3 mm, and seven sheets were used on each long side of the storage box, and three sheets were used on each short side of the storage box.

Incidentally, the fixing plate may be used by being attached to the shape shown in FIG. 4 and being bent. Further, although the above embodiments use single cells, it is also effective when a plurality of 4V, 6V, etc. monoblock storage batteries are combined to form a battery assembly.

Next, in order to compare the performance, when a conventional battery pack that does not use a fixed plate was mounted on a reach-type electric forklift on a road with many steps,
Spacer rise occurred at a rate of once every 0.5 to 1 year, but in the assembled battery of the present invention, there was no spacer rise even after more than 4 years had passed.

Effects of the invention As mentioned above, the assembled battery of this invention can completely prevent the spacer stored in the storage box from rising even when vibrations are applied due to road surface conditions, vehicle structure, driving conditions, etc., and the fixed plate is made of metal. Since thin plates are used, they can be bent freely by hand depending on the number of spacers used, so assembly of the battery pack is extremely easy and has advantages such as low cost.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an embodiment of the assembled battery of the present invention, Figs. 2 and 4 are perspective views of main parts showing the mounting state of the fixing plate of the invention, and Fig. 3 is a spacer in the assembled battery of the present invention. FIG. 3 is a perspective view of a main part showing a state in which the main part is sandwiched between fixing plates. 1... Storage box, 2... Cell battery, 3... Fixed plate,
4...Spacer.

Claims (1)

[Scope of utility model registration request] One end of a fixing plate made of a thin metal plate that has been subjected to anti-rust treatment is welded or screwed to the inner wall surface of a storage box containing a plurality of storage batteries, and the upper end of a spacer is inserted between the storage batteries and the inner wall of the storage box. is sandwiched between the fixing plate and the inner wall of the storage box.