JPH0562957U - Storage battery with radial fins - Google Patents

Abstract

(57) [Abstract] [Object] An object of the present invention is to provide a storage battery with radial fins capable of suppressing the temperature rise of the storage battery at the time of ultra-rapid charge and discharge, and realizing downsizing and weight saving. A storage battery with radial fins, in which metal pole columns 12 and 13 which are electrically connected to the pole group are led out to the upper part of the battery case 2, and radial fins 16 are attached to the tip ends of the pole columns 12 and 13. The heat generated at the time of discharge is transmitted from the pole group to the radial fins 16 having a large heat dissipation surface area through the pole columns 12 and 13 having good thermal conductivity, and is dissipated to the outside air around the storage battery. As a result, the cooling effect of the radial fins can be obtained, and the temperature rise of the storage battery used in the ultra-rapid charge / discharge can be suppressed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a storage battery with radial fins that requires sufficient cooling, such as an electric vehicle used in ultra-fast charging / discharging, an electric work vehicle, or a Ni-Cd storage battery for a levitation railway.

[0002]

[Prior Art]

 Generally, a storage battery for an electric vehicle draws out the motive power required for running, that is, the power required for starting, accelerating, cruising, decelerating, stopping braking, etc., and converts this into mechanical power for operation. It As this type of storage battery, there is one used for ultra-rapid charging / discharging, such as a Ni-Cd storage battery, and various measures have been conventionally made to suppress the battery temperature rise.

An example thereof is shown in FIG. In the figure, 1 is a Ni-Cd storage battery, the poles 3 and 4 conducting to the pole group are led out to the upper part of the metal battery case 2, and the connection nuts 5 and 6 are connected to the poles 3 and 4. It is screwed on. When this storage battery 1 is used in ultra-rapid charge / discharge, the amount of heat generated is large. Usually, the heat generation of a storage battery is due to the difference in entropy of the product before and after the electromotive force of the constituent materials of the pole group and the Joule heat due to the electric resistance when the electromotive current flows through the constituent members of the storage battery. In order to suppress such heat generation, in the conventional example, a large number of plate-shaped fins 7, 7 are attached to both sides of the metal battery case 2 to suppress the rise in battery temperature.

[0004]

[Problems to be solved by the device]

 However, in the conventional structure in which the plate-shaped fins 7 are installed around the battery case, the heat inside the battery case 2 is difficult to be transferred to the plate-shaped fins 7 outside the battery case 2, so that the cooling effect is not sufficient and the storage battery Can not suppress the excessive fever of. In this case, the functions of the components of the storage battery, especially the synthetic resin parts and rubber parts, may deteriorate, the water content of the electrolyte may evaporate, the internal pressure of the battery may rise, and the electrode plate group of the storage battery may be deformed. This may cause electric discharge, early deterioration of charging performance, reduction of useful life, and unexpected accident of short circuit.

Moreover, in order to enhance the cooling effect of the plate-shaped fins 7, the number of fins must be increased, and in this case, the weight of the fins themselves becomes considerable, and the weight of the storage battery becomes excessively large. ..

Moreover, since the plate-shaped fins 7 project around the battery case 2 respectively, the lateral dimension of the storage battery becomes large, which leads to an increase in the size of the device.

As another conventional example, it has been proposed to cool the ventilation to cool the storage battery or to increase the ventilation amount, but the space and weight occupied by these accessories are large. It had the drawback of becoming a thing.

This invention has been made in order to solve the above-mentioned conventional problems, and provides a radiation fin-equipped storage battery capable of suppressing the temperature rise of the storage battery during ultra-rapid charging and discharging, and realizing downsizing and weight saving. The purpose is to provide.

[0009]

[Means for Solving the Problems]

 In this invention, a metal pole column that conducts to the pole group is led out to the upper part of the battery case, and a radial fin is attached to the tip of the pole column.

[0010]

[Action]

 According to this invention, since the radial fins are attached to the metal poles, the heat generated during charging / discharging is transferred from the pole group housed inside the battery case to the poles with good thermal conductivity, and the radial fins are Is diffused to the outside air around the storage battery. Moreover, since the fins are formed in a radial shape, the heat dissipation surface area is increased and the cooling effect is enhanced. Therefore, it is possible to efficiently suppress the temperature rise of the storage battery used in the ultra-rapid charge / discharge.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, a radial fin storage battery 10 according to the present invention is, for example, a Ni—Cd storage battery, and a pole group (not shown) capable of withstanding use in ultra-rapid charge / discharge is a metal battery case 2. The pole columns 12 and 13 which are housed inside and electrically connected to this pole group are led out to the upper part of the battery case 2. Connection nuts 14 and 15 are screwed to the base ends of the poles 12 and 13, and cooling fins 16 are attached to the tip ends thereof. The fins 16 and 16 are radially formed around the poles 12 and 13 at equal intervals in the circumferential direction, and are made of a material having excellent thermal conductivity, such as aluminum or copper.

In the above structure, since the radial fins 16 are attached to the metal pole columns 12 and 13, respectively, the heat generated during the ultra-rapid charge / discharge is generated from the pole group inside the battery case with good thermal conductivity. It is directly transmitted to 12 and 13 and is diffused from the radial fins 16 and 16 to the outside air above the battery case 2. Moreover, since the radial fins 16 and 16 have a large heat dissipation surface area, the cooling effect of the fins is further enhanced, and the temperature rise of the storage battery is suppressed as much as possible.

As a result, it is possible to prevent deterioration of the components of the storage battery used in ultra-rapid charge / discharge, evaporation of water in the electrolytic solution, rise in the internal pressure of the battery, etc., so that the charge / discharge performance of the storage battery is improved and the service life is improved. Can be extended.

Further, since the radial fins 16 and 16 are installed in the dead space above the battery case 2, the storage battery itself can be made compact and lightweight.

Next, regarding the radial finned storage battery 10 according to the present invention shown in FIG. 1 and the conventional plate finned storage battery 1 shown in FIG. 2, the temperature rise of the storage battery when ultra-rapid charge / discharge is carried out. investigated. The results are shown in Table 1.

[0017]

[Table 1] Table 1

According to Table 1, it is clear that the storage battery of the present invention has an extremely small temperature rise and a very small fin weight as compared with the storage battery of the conventional product. Converting into a cooling effect per unit weight, it is 10 It was confirmed that the effect was more than doubled.

In the above embodiment, the radial fins 16 are attached to the left and right pole columns 12 and 13, respectively, but the radial fins 16 may be attached to one of the pole columns 12 or 13. Needless to say, the number of fins fitted to one pole is not limited to one.

[0020]

[Effect of the device]

 As described above, according to the present invention, by mounting the radial fins on the pole column made of metal, the heat generated at the time of charging / discharging is radiated from the pole group through the pole column with good thermal conductivity to the surface area. Since it is transmitted to the large radial fins and is dissipated to the outside air around the storage battery, the cooling effect of the radial fins can be obtained, and the temperature rise of the storage battery used in ultra-rapid charge / discharge can be suppressed as much as possible. Therefore, it is possible to prevent the deterioration of the constituent members of the storage battery and to extend the service life.As a result, it is not necessary to install a large fin and increase the cooling air flow as in the conventional case, and it is possible to achieve ultra-fast charge and discharge. It is possible to obtain a suitable small and lightweight storage battery.

[Brief description of drawings]

FIG. 1 is a perspective view showing a storage battery with radial fins according to the present invention.

FIG. 2 is a perspective view showing a conventional plate-shaped finned storage battery.

[Explanation of symbols]

 10 Storage Battery 11 Battery Case 12, 13 Pole Pillar 16 Radial Fin

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Creator Eiji Sawano 6-19-4-206 Yatsu, Narashino, Chiba Prefecture

Claims (1)

[Scope of utility model registration request] 1. A storage battery in which a metal pole column that conducts to a pole group is led out to the upper part of a battery case, wherein a radial fin is attached to the tip of the pole column.