JPS5991658A - Monoblock container for alkaline storage battery - Google Patents

Abstract

PURPOSE:To facilitate heat radiation from an alkaline storage battery so as to improve its life characteristic by burying a metallic plate in each partition wall provided between adjacent unit cell containers of a monoblock container in such a manner that a part of each metallic plate protrudes outside the container, and attaching radiation plates to the ends of the protruding parts. CONSTITUTION:At the same time when a monoblock container 1 is formed by subjecting AS resin or the like to injection molding, metallic members 3 made of copper, silver, aluminum or the like and having a high thermal conductivity are buried in partition walls 1' each provided between adjacent unit cell containers 2 in such a manner that a part of each member 3 protrudes outside the container 1. Next, radiation plates 4 are attached to the ends of the protruding parts. After that, electrolyte and a plate group consisting of a positive plate, a negative plate, a separator and the like are installed in each unit cell container 2, thereby constituting an alkaline storage battery such as an Ni-Zn battery. Owing to such constitution as above, the increase in temperature of the battery caused during its charge and discharge can be reduced due to the heat radiation of the radiation plates 4. As a result, the life of the battery can be increased by preventing any reduction in its performance.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a battery case for a so-called seven-block type battery, which forms a battery assembly in which a plurality of unit batteries of alkaline storage batteries such as Ni-7n batteries and Ni-Fc batteries are used as one unit. 'C1's purpose is ■Knob 1. By embedding a metal plate in the partition wall between the adjacent JR unit (O battery case) of Itsu type mm and having a part of it protrude outside the case, and attaching a heat sink to the protruding part, it is possible to prevent damage from the battery. The object of the present invention is to provide an alkaline storage battery that is easy to use and has excellent characteristics as a result.

The Nofulh storage battery is a Ni-7n battery that uses, for example, a nickel hydroxide horizontal plate as a positive electrode, a zinc electrode as a negative electrode, and uses a caustic potassium aqueous solution or the like as an electrolyte. In addition, alkaline storage batteries are known as batteries that exhibit excellent characteristics at room temperature or at low temperatures below failure, contrary to lead storage batteries. However, at high temperatures, the charging efficiency of the battery, especially the charging efficiency of the positive electrode plate, decreases significantly, and the deterioration of the electrode plate becomes more significant.
When used at 81 degrees Celsius, the disadvantage is that the capacity decreases significantly and the life span is shortened. Therefore, conventionally the number II!
,! 1. There are almost no 1-type batteries, such as lead-acid batteries for automobiles, which are a collection of 1. However, it was a battery with a low energy density, in which the ratio of the electrode plates to the internal volume of the battery case was extremely small.

However, in recent years, there has been a growing demand for alkaline storage batteries that can charge and discharge at high rates due to the demand for high energy densities. Then, a problem arises in that battery temperature increases due to heat generated by the battery during charging and discharging, resulting in a decrease in performance as described above.

The present invention relates to a monoblock type battery case for eliminating these problems and providing a long-life battery with little capacity loss, and will be described in detail below with reference to the drawings.

! Figures 11 (a) and 11 (b) are an embodiment of a monoblock type battery case according to the present invention, in which (a) is a top view and (0) is a side view. (1), As formed by injection molding etc.
With a horizontal wall made of synthetic resin such as resin or ABS resin (1')
Similarly, is a partition wall between unit batteries that connect to PJll.

(2) is a unit battery tank portion into which electrode plates such as a positive electrode plate, a negative electrode plate, and a separator and an electrolyte are inserted. The battery is completed by inserting these electrode plates into each sliding part, attaching a lid to the top of the plate, electrically connecting them in series or parallel, and completing a 3-cell monoblock type battery. (3) is a metal plate embedded in the horizontally open partition wall (1') between adjacent unit cells, a part of which protrudes outside the m-cell. As a metal plate,
Metals with high thermal conductivity such as silver and aluminum are suitable for the body. Further, the direction in which the metal plate is made to protrude outside the battery case is not limited to both sides as shown in FIG. 1, but may be made to protrude from the top and bottom depending on the shape and size of the battery.

(4) is a heat dissipation plate attached to the protruding part of the metal plate (3) outside the battery case, and is attached to the metal plate (3) by screwing, fitting, brazing, etc.

The thickness of the metal plate should be determined depending on the size and shape of the battery, but generally a thickness of 0.2 to 2.0IIIll is appropriate. Further, it is preferable that the area of the metal plate and the heat sink (4) be as large as possible. In this example, the method of attaching the heat sink (4) to the metal plate (3) after forming the battery case was shown in C. However, as shown in Fig. 2, the metal plate (3) and the heat sink (4) were It may be kept as a single unit.

The present invention aims to improve heat dissipation from the battery by using the metal plate and the IQ heat plate, thereby suppressing the temperature rise of the battery and obtaining a long-life alkaline storage battery. Let's talk about performance.

C1 nominal capacity 110 using the battery case according to the present invention shown in FIGS. 1 and 2 and a conventional battery case in which a metal plate is not embedded in the partition wall.
A 3-cell monoblock type Ni--Zn battery of 0 All was manufactured, and changes in capacity reduction due to temperature rise during battery charging and repeated charge/discharge cycles were investigated. Fig. 3 shows the test results of temperature rise, and Fig. 4 shows the change in capacity during charge/discharge cycles.

The battery (A) according to the invention contains 140x 200x (
A 1.5 mm metal plate is used, and a heat dissipation plate with a surface area of about 150 d is attached to the protrusion of the metal plate 1). (B)
is a conventional battery.

As test strip f1, charging is 0.20A in Figure 3.
(20A) for 8 hours. Also, in Figure 4, the release fllK
0.2CA (20A) until t' 4.2V, then 0.20A (20A) to reduce the previous discharge amount to 12V.
The battery was repeatedly charged and discharged to a 5% charge. As shown in Figure 3, the test results show that the battery according to the present invention exhibits only a small increase in m degrees.
As shown in Figure 4, the battery was found to have a longer lifespan than conventional products. Tests 1 to 1 were also carried out on a battery having the same capacity as lν, in which the metal plate and heat sink shown in FIG. 2 were integrated in advance and embedded in the partition wall, and the results were almost the same as those of the product of the present invention.

As mentioned above, the present invention provides an alkaline storage battery with excellent performance, especially a long life.
It is also applicable to Cd batteries. Furthermore, in the embodiments of the present invention, an example of forming a monoblock type battery case by injection molding was shown, but if a battery case with a similar shape is manufactured by machining or adhesive processing, almost the same effect can be obtained. Therefore, there are no particular limitations on the method of manufacturing the battery case of the present invention.

[Brief explanation of drawings]

! Figures 11(a) and 11(o) are examples of the monoblock type battery case according to J3 according to the present invention, and Figure 2 is an example of a metal plate embedded in a partition wall, which is pre-integrated with a heat sink.
Figures 3 and 4 are diagrams comparing the performance of the Ni--Zll battery according to the present invention and the conventional Ni--ZlN battery. 1... Side wall, 1'... Partition wall, 2...
... Suribe, 3.・・・・・・Metal plate, 4・・・・・・
Heat dissipation plate 1 diagram 3 B light t! Ig? Same way 21g large 4 1 full (town)

Claims (1)

[Claims] A metal plate is embedded in the IlliWL between adjacent unit battery cells, a part of the metal plate is protruded to the outside of the battery case, and a heat dissipation plate is attached to the protrusion. A monoblock type battery case for alkaline storage batteries.