JPS5879439A - Electric motor vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric vehicle equipped with a storage battery as a secondary battery serving as a driving energy source.

This type of electric vehicle is seen as a promising candidate to replace gasoline-powered cars in the future, as it has no exhaust gas or noise (engine noise) and is more energy efficient than gasoline-powered cars.

The Ministry of International Trade and Industry established an electric vehicle trial system in 1978 and is working to popularize it, but its practical use has been limited to some areas, such as for milk delivery.

The bottleneck to its widespread use is battery performance.Incidentally, a practical driving test was carried out using a high-pressure lead battery (MP-150 type) with an energy density of 45 watt hours per kg and a lifespan of 1,000 cycles. Now go to 40 per hour! The driving distance on a single charge when driving at a constant speed was approximately 120 -, and in a practical driving test using 11 alkaline batteries with nickel-zinc electrodes with an energy density of 67 watts per kp, the driving distance on a single charge when driving at a constant speed was 4013 mph. The maximum charging distance is about 160 km.

On the other hand, a conventional gasoline-powered car can travel a distance of about 600k11 on a full charge of gasoline, so an electric vehicle does not even reach one-third of the mileage of a gasoline-powered vehicle.

However, if we consider the future 30 or 50 years from now, it is clear that gasoline will run out and prices will soar, which is why there is an urgent need to put electric vehicles into practical use.

Therefore, the present invention converts the thermal energy that is heated to a high temperature by solar heat and stored in the outer shell of the car body into auxiliary charging energy for the storage battery when the car is parked in the car or parked in the open or in the open in the summer during 1% of good weather. In addition to the thermal energy, solar irradiation light energy is also converted into auxiliary charging energy for the storage battery to maximize driving distance. The purpose is to extend the distance and reduce the number of times the battery needs to be charged from a commercial power source.

An embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG.

In the electric vehicle A of the present invention, conversion elements such as photovoltaic cells or solar cells that absorb external irradiation light energy and convert it into electric energy are connected in series or in series-parallel to the entire outer surface of the ceiling plate part/a of the vehicle outer shell l. While the nine photoelectric element groups are installed, a thermal battery is installed on the entire inner surface of the ceiling panel /a that absorbs thermal energy stored in the outer shell of the vehicle body, especially in the ceiling panel /a, using external radiant heat energy and converts it into electrical energy. A thermoelectric element group 3 is installed in which converting elements such as a solar cell or a heat converter are connected in series or in series and parallel.

In the circuit diagram of Fig. 2, ≠ indicates a storage battery for driving a car, -
tl B is a protection diode that prevents reverse current, 7 monitors the input terminal voltage of the storage battery G, and when the storage battery ≠ is overcharged, it energizes the relay coil t and opens the relay contact to prevent the storage battery ≠ from being overcharged. Overcharge prevention control circuit to prevent, IO
monitors the output terminal voltage of the storage battery≠, and when the storage battery≠ reaches the end of discharge, the relay coil /l is energized and the relay contact 12 is opened to prevent overdischarge of the storage battery≠. The circuit /3 is a control switch.

Since the present invention is configured as described above, when parking or driving in the open sky, the photoelectric element group 2 converts external irradiation light energy such as the sun into electrical energy, and at the same time converts external radiant heat energy such as the sun into electric energy. Thermal energy stored in the ceiling panel /a is converted into electrical energy by the thermoelectric element group 3 and generated, and the protection diode! , B, the storage battery≠ is charged via the relay contact, and if the motor control switch is in the ON state, it becomes the driving power for the drive motor 13. Photoelectric element group λ
When the thermoelectric element group 3 is sufficiently charged and the storage battery is saturated, the overcharge prevention control circuit 7 automatically opens the relay contact to stop overcharging the storage battery, and vice versa. Automatically by the over-discharge prevention control circuit/θ at a certain time before the storage battery becomes empty, that is, when the output terminal voltage level drops to a predetermined voltage, and immediately before the backward discharge state when a warning lamp (not shown) indicates that power has been applied. By opening the relay contact 12 to prevent overcharging and overdischarging of the storage battery, deterioration of the storage battery can be significantly reduced.

Incidentally, by providing the overcharge/discharge prevention control circuit with a suitable hysteresis characteristic, it is easy to alleviate the fluctuation of the relay contact and /2.

In the embodiment of the present invention, the photoelectric element group λ may be omitted, and in the electric vehicle A, the photoelectric element group λ may be omitted. The vehicle body outer shell l to which the element group ko and thermoelectric element group 3 are attached are bonnet/b, trunk/c,
Door/lL, side/e.

It may also be attached to a floor plate portion (not shown) or the like. However, if a group of thermoelectric elements is attached to the floorboard, heat from the road surface can be effectively absorbed.

Furthermore, if the thermoelectric element group 3 is omitted from the photoelectric element group, it is possible to attach it to the outer shell/outer surface of the vehicle body, or to attach it to the outer shell/outer surface of the vehicle body alternately adjacent to the photoelectric element group. However, it is still included within the spirit of the present invention.

The photoelectric element group λ and the thermoelectric element group 3 may be mounted in the form of a panel in the outer shell of the vehicle body, or embedded in the outer shell l of the vehicle body itself.

Thus, the present invention can extend the traveling distance of a photoelectric device using a commercial power source by supplying auxiliary charging energy, and has an energy-saving effect.Moreover, when a photoelectric device group and a thermoelectric device group are used together, the photoelectric device A synergistic effect that allows thermoelectric elements to suppress deterioration of conversion characteristics due to temperature rise through heat absorption.

The effects of this, such as making it possible to achieve the desired results, are significant.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the electric vehicle of the present invention, and FIG. 2 is an electric circuit diagram thereof. A...Electric car

Claims (1)

[Scope of Claims] 1. An electric vehicle in which a group of thermoelectric elements is attached to a predetermined location on the outer shell of the vehicle body, and the electric energy obtained by absorbing external radiant heat energy is used as auxiliary charging energy for a storage battery.2. The group of thermoelectric elements is , a thermal battery, a thermoelectric solar cell, a thermal converter, or a combination thereof, according to claim 1. The thermoelectric element group and the photoelectric element group are installed at predetermined locations on the outer shell of the vehicle. An electric vehicle 4 that absorbs and converts radiant heat energy and external irradiation light energy and supplies the electrical energy as auxiliary charging energy for a storage battery.The thermoelectric element group is either a thermal battery, a thermoelectric solar cell, a thermal converter, or The electric vehicle 5 according to claim 3 is a combination; the electric vehicle 6 according to claim 3 or 4, wherein the photoelectric element group is either a photovoltaic cell or a solar cell or a combination; The electric vehicle according to claim 3, 4, or 6, wherein the element group is attached to the inner surface of the outer shell of the vehicle body, and the photoelectric element group is attached to the outer surface of the outer shell of the vehicle body.