JPH07329581A - Battery heating device for electric vehicle - Google Patents

Abstract

PURPOSE:To heat a battery mounted to an electric vehicle so as to prevent the performance lowering of the battery at the time of low temperature and not to consume special energy to heat the battery. CONSTITUTION:A battery heating device for an electric vehicle is provided with a heat receiver 3 for heating a heating medium by the heat generated from equipment such as the motor 2 and brake 1 of the electric vehicle, and heating plates 6, 6 provided with passages for passing the heating medium fed from a pump for circulating the heating medium heated by the heat receiver 3. A battery is heated by the heating medium circulated through the heating plates 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention heats a battery which is a power source of a motor for an electric vehicle running in a cold region at a low temperature such as winter to prevent deterioration of the battery capacity at a low temperature. To use.

[0002]

2. Description of the Related Art Conventionally, in a vehicle designed for cold regions,
Techniques for heating a battery in order to prevent a decrease in battery capacity or to improve charging efficiency during traveling are already known (see Japanese Utility Model Laid-Open No. 56-134249).
However, the conventionally known battery heating device is provided with a warm air heater in the storage room storing the battery, or guiding hot water of the radiator for cooling the engine to the underfloor of the storage room storing the battery, The structure is such that the battery is heated by these hot air and hot water.
With such a structure, the former warm air type consumes a large amount of power, and it is difficult to secure that power. In addition, the latter type of heating with hot water cannot be used in an electric vehicle without an engine.

[0003]

INDUSTRIAL APPLICABILITY The present invention is applied to an electric vehicle, which has been widely developed in the limelight as a pollution-free vehicle in recent years, has no special power consumption, and can be applied to an electric vehicle in terms of space. The present invention provides a battery heating device that can be easily adopted.

[0004]

A heating device for a battery for an electric vehicle according to the present invention heats a heat medium flowing therein by receiving heat from a device which is built into the electric vehicle and generates heat when the electric vehicle is running. A heat receiver, a plate-shaped heating plate on the upper surface of each of which the same number as the battery can be placed, and a pump for circulating a heat medium between the heating plate and the heat receiver. . And each said heating plate is mounted on the upper surface of a heat insulating material. Further, inside each heating plate, there is provided a curved flow path for circulating the heat medium. A heat medium inlet is provided at the upstream end of this flow path, and a heat medium outlet is similarly provided at the downstream end thereof. Then, between the heat medium outlet and the heat medium inlet of the heating plate which are adjacent to each other in the flow direction of the heat medium, the heat medium inlet of the heating plate at the upstream end in the flow direction of the heat medium and the heat medium of the heat receiver. There is flexibility for flowing the heat medium between the heat medium outlet and the heat medium outlet of the heating plate at the downstream end in the flow direction of the heat medium and the heat medium inlet of the heat receiver. A piping member is provided. The pump is provided in the middle of this piping member.

[0005]

In the warming device for a battery for an electric vehicle of the present invention having the above-described structure, the function of the device, such as a drive motor or a brake for driving the vehicle, is harmful to the function of the device. The heat is used as a heat source for heating the battery. Then, this heat heats the heat medium existing in the heat receiver, and the heated heat medium is circulated and moved to the heating plate on which the battery is mounted. Therefore, the battery can be heated without using a special heat source (energy).

[0006]

1 to 3 show an embodiment of the present invention. In FIG. 1, 1 is a brake, which is one type of equipment that generates heat when an electric vehicle is operating, and 2 is a motor, which is one type of equipment that also generates heat when operating an electric vehicle. Again 3
Is a heat receiver that receives a heat medium such as water, oil, or a high boiling point solvent and heats the heat medium. Further, 4 is a heat pipe, and one end side of the heat pipe 4 is brought into contact with the vicinity of the heat generating portions of the brake 1 and the motor 2. Also, 5 sends out the heat medium in the heat receiver 3, and a heating plate 6, which will be described later,
It is a pump for circulating the inside of 6. Further, 7 and 7 are batteries mounted on the heating plates 6 and 6. Further, 8 is a heat insulating material, and this heat insulating material 8 is supported on the floor surface of the vehicle body, and supports the heating plates 6, 6 on the upper surface thereof, and the heat of each heating plate 6, 6 is applied to the vehicle body side. To avoid running away. The heat receiver 3, the pump 5, and the heating plates 6 and 6 have a heat medium inlet 9 and a heat medium outlet 10 at both ends (upstream end and downstream end). The heat medium inlet 9 and the heat medium outlet 10 are connected to each other by a flexible hose 11 made of rubber, synthetic resin or the like, which is a piping member, to form a circulation passage for the heat medium. The heat receiver 3 includes therein a heating chamber 12 that receives the heating medium and heats the heating medium, and has the heating medium inlet 9 and the heating medium outlet 10 connected to the heating chamber 12 at both ends thereof.
Is provided.

Each of the heating plates 6 and 6 is formed by stacking a plate member 15 as shown in FIG. 2 and a passage plate 19 as shown in FIG. 3 and brazing the mating surfaces. First, the plate member 15 has a quadrangular shape slightly larger than the plane area of the battery 7, and has semicircular troughs 13 and 14 for forming the above-described heat medium inlet 9 and heat medium outlet 10 at both ends thereof.
Is equipped with. Further, the passage plate 19 has a rectangular shape having the same size and shape as the plate member 15, and has a half for forming the heat medium inlet 9 and the heat medium outlet 10 at both ends facing the troughs 13 and 14. It has circular gutters 16 and 17. A passage 18 having a semicircular cross section and meandering in zigzag is provided between the gutters 16 and 17, and the passages 18 connect the two gutters 16 and 17 to each other. The plate member 15 and the passage plate 19 are brazed in an overlapped state,
Alternatively, they are liquid-tightly coupled to each other by welding or the like to form the heating plate 6. Then, such heating plates 6 are prepared as many as the batteries 7 to be used and placed on the heat insulating material 8.

The plate member 15 is made of a metal plate such as aluminum alloy or copper having good heat conductivity, and its upper surface is for preventing corrosion due to sulfuric acid or the like leaking from the battery 7. A coating layer 20 made of synthetic resin (eg polypropylene) is formed. The passage plate 19 is also made of the same material as that of the plate member 15 because brazing and welding are required.

Since the electric vehicle battery warming apparatus of the present invention is constructed as described above, the heat generated from the brake 1, the motor 2, etc. is transferred to the heat receiver 3 via the heat pipe 4. The heat receiver 3 is heated. The heat medium heated by this heat is sent to the respective heating plates 6, 6 by the operation of the pump 5, and the respective passages 18, 18
Is returned to the heat receiver 3. During this time, the heating medium heats the plate member 15 of each of the heating plates 6 and 6 and heats the batteries 7 and 7 mounted thereon.

In the above embodiment, the heat is transferred from the heat source to the respective heating plates 6, 6 by the heat pipe 4. However, instead of omitting the heat pipe 4, the heat receiver directly covers the heat source. However, the heat receiver may be directly heated by the heat from the heat source to heat the heating medium.

In the case of the above embodiment using the heat pipe 4, a cutting device is provided at the connecting portion between the heat receiver 3 and the heat pipe 4, and the ambient temperature is high during the summer and the battery 7 need not be heated. At this time, the transfer of heat by the heat pipe 4 can be shut off (OFF).

By using the flexible hose 11 as the piping member, damage to the connecting portion and the pipe due to vibration during traveling can be prevented. Further, if styrene foam is used for the heat insulating material 8 that supports the heating plate 6, it can withstand the weight of the battery sufficiently, and it can also serve as a damper and prevent troubles due to vibration.

[0013]

Since the electric vehicle battery warming apparatus of the present invention is constructed and operates as described above, it is possible to warm the battery without using special energy, thereby reducing the capacity of the battery. It can be prevented. Therefore, a long running distance can be secured by one charge, and stable running at a high speed is possible. Further, when a fuel cell is used, for example, charging during traveling is efficiently performed, and power consumption is recovered faster. Moreover, if a brake or a motor is used as a heat source, it is possible to prevent troubles due to heat generation of devices such as the brake and the motor.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a warming device for an electric vehicle battery of the present invention.

FIG. 2 is a perspective view of a plate member that is a component of the heating plate.

FIG. 3 is a perspective view of the passage plate.

[Explanation of symbols]

 1 Brake 2 Motor 3 Heat Receiver 4 Heat Pipe 5 Pump 6 Heating Plate 7 Battery 8 Heat Insulating Material 9 Heat Medium Inlet 10 Heat Medium Outlet 11 Flexible Hose 12 Heating Room 13, 14 Higuchi 15 Plate Member 16, 17 Higuchi 18 Passage 19 Passage Board 20 coating layer

Claims (1)

[Claims] 1. A heat receiver that is incorporated in an electric vehicle and heats a heat medium that flows inside by receiving heat from a device that generates heat when the electric vehicle is running, and a battery can be placed on each upper surface of the heat receiver. A plate-shaped heating plate of the same number as the battery and a pump for circulating a heat medium between the heating plate and the heat receiver are provided, and each heating plate is placed on the upper surface of the heat insulating material. , A curved flow path for circulating the heat medium is provided inside each heating plate, a heat medium inlet is provided at the upstream end of the flow passage, and a heat medium outlet is provided at the downstream end. The heat medium is provided between the heat medium outlet and the heat medium inlet of the heating plate which are adjacent to each other in the flow direction of the heat medium, and the heat medium inlet and the heat receiving port of the heating plate at the upstream end in the flow direction of the heat medium. Between the heat medium outlet of the vessel,
Also, a flexible piping member for flowing the heat medium is provided between the heat medium outlet of the heating plate and the heat medium inlet of the heat receiver at the downstream end in the flow direction of the heat medium. The pump is a battery heating device for an electric vehicle, which is provided in the middle of the piping member.