JP3401568B2 - Mounting mechanism for cylindrical batteries for electric vehicles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular battery for an electric vehicle, which is implemented to mount a tubular battery used as a power source for an electric vehicle such as an electric four-wheeled vehicle or an electric three-wheeled vehicle on a vehicle body as an assembled battery. Related to the mounting mechanism.

[0002]

2. Description of the Related Art A conventional electric vehicle uses a storage battery (lead battery) of DC 24V to 300V as its power source, which is very heavy and has been a bottleneck in improving the performance of the electric vehicle. On the other hand, tubular batteries typified by NiCad batteries are lightweight and therefore advantageous for application to electric vehicles, but since the nominal voltage is a few volts, they can be used as a power source for electric vehicles by combining multiple batteries. Is generally used.

Conventionally, the combination mode of the assembled battery is shown in FIG. 4A.
As illustrated in FIG. 4C, a battery pack (FIG. 4A) in which four cylindrical batteries 1 are closely adhered in parallel and directly connected by lead wires 11 and fastened with a tape 10 (FIG. 4A), or inside a tube exterior 12 made of a resin film In general, a battery pack (FIG. 4B) containing four cylindrical batteries 1 or a battery pack (FIG. 4C) housed in a plastic case 13 was used. And this assembled battery was simply mounted on the body of an electric vehicle.

[0004]

Power source batteries for electric vehicles are often used with high current discharge, and efficient heat dissipation processing of heat generated by the internal resistance of the batteries has become a serious problem. In particular, as a power supply battery for an electric vehicle, nickel-cadmium battery is excellent because it Ru Oh <br/> in lightweight is also become a disadvantage in many points of the heating value. In addition, the conventional mounting mechanism using the assembled battery shown in FIGS. 4A to 4C cannot sufficiently cope with the above heat generation.

Further, in the case of a cylindrical battery, it is necessary to combine the cylindrical battery with the assembled battery before mounting the battery. Therefore, not only the time and effort required for the combination increase but the number of parts to be mounted increases, and the degree of freedom of mounting is also lost. The reality is that Accordingly, an object of the present invention is to provide a tubular battery mounting mechanism for an electric vehicle, which can efficiently dissipate heat generated when the tubular battery is used and has a degree of freedom in mounting on an electric vehicle. .

[0006]

[Means for Solving the Problems] As means for solving the above-mentioned problems, a mounting mechanism of a cylindrical battery for an electric vehicle according to the invention described in claim 1 is made of a material which is lightweight and has high thermal conductivity. , a pair of heat sinks batteries holding portion 5 of the arc groove shape in close contact with approximately half surface of the cylindrical battery 1 is formed with a plurality
Cylindrical battery 1 of several by the plate 2, 2 having a function
Across from both the outside that it is sandwiched, it with a gap between the pair of plates 2, 2 ventilation passage 6 ... are formed, cylindrical battery 1 sandwiched as described above are It is characterized in that they are connected in series to form a power supply unit of the electric vehicle, and that the plate 2 is attached to the body of the electric vehicle.

The invention according to claim 2 is the same as that of claim 1.
And an electric vehicle for cylindrical battery loading mechanism, fins 7 in the plate 2, the air passage 6 ... portion between the cylindrical batteries 1 and the adhesive surfaces excluding portions or a pair of plates 2, 2
Or the radiating uneven portion is provided, the cylindrical battery 1 that cross-section is circular, Plate 2 it and Tei Turkey attached to the body of the electric vehicle via a vibration isolating material 4 <br/> Each feature.

[0008]

When the tubular battery 1 generates heat due to its use, the plate 2 having a high thermal conductivity which is in close contact with the outer peripheral surface of the tubular battery 1
Heat is absorbed by the battery holding portion 5 and is radiated to the atmosphere through the plate 2. The air passage 6 exerts a cooling effect by taking in natural convection and running wind of the automobile. Plate 2
Is attached to the vehicle body of an automobile by means of screwing 3 or the like, so that the cylindrical battery 1 as an assembled battery can be mounted.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a state in which a plurality of cylindrical batteries 1 are mounted in an electric vehicle in the form of an assembled battery. The outer peripheral surface of the cylindrical battery 1 is sandwiched by a pair of plates 2 and 2, and is fixed by screws 3 to the body of an electric vehicle (not shown). The plate 2 is made of, for example, an aluminum plate that is lightweight and has a high thermal conductivity, and is provided with a plurality of battery holding portions 5 formed in a semicircular groove shape that are in close contact with the semicircular surface of the cylindrical battery 1. Also, a pair of plates 2, 2
A gap between both plates, which occurs when the cylindrical battery 1 is sandwiched, is formed as a ventilation passage 6 for cooling. Therefore,
The plate 2 has not only a holding function of holding the tubular battery 1 but also a heat sink function of effectively absorbing and radiating heat generated from the tubular battery 1. In particular, the battery holding part 5
Directly adheres to the outer peripheral surface of the cylindrical battery 1, so that the heat absorbing action is effective. In addition, since the cylindrical battery 1 is strongly adhered to the plate 2 by tightening the screw 3, the cylindrical battery 1
Adhesion between the plate and the plate 2 can be sufficiently ensured. further,
By appropriately increasing the thickness of the plate 2, the heat sink function corresponding to the heat generation amount of the tubular battery 1 can be sufficiently enhanced. The ventilation passage 6 can be used not only for cooling by natural convection of air but also for actively and effectively cooling the plate 2 and the cylindrical battery 1 by taking in traveling wind during normal traveling of the automobile. In order to further enhance the heat dissipation effect, as shown in FIG. 2, fins 7 are provided on the outer surface of the plate 2 and inside the air passage 6, or heat dissipation such as a bent portion 8 that enlarges the cross-sectional area of the air passage 6 is performed. An uneven part can also be used.

Further, as shown in FIGS. 3A and 3B, the processed shape or the whole shape of the plate 2 is formed into an arbitrary shape so as to correspond to the number of the cylindrical batteries 1 to be mounted and the limitation of the mounting space. it can. Further, as the processing method of the plate 2, it is possible to adopt an economical processing means most suitable for each shape such as bending processing or extrusion processing as well as casting processing.

The tubular battery 1 is, for example, a nicad battery having a circular cross section. A commercially available product having a diameter of 45 mm and a length of about 150 mm, which is advantageous in terms of cost, is used. The cylindrical battery 1 is not limited to the nickel-cadmium battery, and various conventional cylindrical batteries can be adopted. Further, the cross section of the cylindrical battery 1 is not limited to a circular shape, and other squares or the like can be adopted, but the circular shape is particularly excellent in terms of manufacturing cost.

A vibration-proof rubber 4 which is a vibration-proof material is attached to the outer surface of the plate 2, which is not shown in the figure, to be mounted on the vehicle body of an automobile so that harmful vibration is transmitted from the vehicle body side to the cylindrical battery 1 as much as possible. Prevention is done. Further, as the means for attaching the plate 2 to the vehicle body, not only the direct attachment method using the screw 3 described above but also the one-touch type attachment can be performed by using an intermediate plate or the like for male / female fitting, so that the attachment is free. It is also preferable to increase the degree.

[0013]

EFFECTS OF THE INVENTION Since the tubular battery mounting mechanism for an electric vehicle according to the present invention sandwiches the tubular battery by the plates 2 having excellent thermal conductivity, the heat generated during use of the tubular battery can be efficiently generated. Not only can it be processed, but the workability of mounting the cylindrical battery in an electric vehicle can be improved and the degree of freedom can be increased.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a tubular battery is sandwiched.

FIG. 2 is a cross-sectional view of a plate with improved heat dissipation effect.

FIG. 3 is a cross-sectional view of plates processed into different shapes.

4A to 4C are perspective views showing a state in which a conventional tubular battery is assembled.

[Explanation of symbols]

1 cylindrical battery 2 plates 6 Ventilation path 4 Anti-vibration material

Claims (2)

(57) [Claims] 1. A lightweight consist high thermal conductivity material, batteries holding portion of the arc groove shape in close contact with approximately half surface of the cylindrical battery double
That cylindrical battery multiple is sandwiched from both sides by the plate <br/> having a pair of heat sinking which are several forms, the ventilation passage with a gap is formed between said pair of plates The tubular batteries sandwiched as described above are connected in series to form a power supply unit of an electric vehicle, and the plate is attached to a body of the electric vehicle, respectively, for an electric vehicle Cylindrical battery mounting mechanism. 2. A Plate, the ventilation path portion between portions or a pair of plates excluding the surface in close contact with the cylindrical battery Fi
That for emissions or dissipating uneven portion is provided, the cylindrical battery that cross-section is circular, Plate, respectively, characterized in that attached to the body of the electric vehicle via a vibration-proof material , Claim 1
The mounting mechanism of the electric car for the cylindrical battery.