The present invention relates to a heating system which enables the waste heat and regenerative energy to be used again by storing as heat for electric vehicles. Background of the Invention

In order to heat the cabin of the electric vehicles, the waste heat generated during operation of the vehicle and the electrical resistance heat is used. The heating can simply be provided with electrical resistance heater, high efficiency and complementary cooling can be obtained from a reverse operating heat pump. Although they are sufficient for waste heat heating system of the electrical vehicles, they cannot be used efficiently since the amount of waste heat is much less relative to the ICS (vehicles with internal combustion engines) and they do not allow a comfortable fixed heating at various speeds. Even though the temperature of the engine coolant of the electrical vehicles can technically be in high values, the temperature values are low since heat loss occurs due to the generated waste heat amount being low. Furthermore, all of the regenerative braking energy in electrical vehicles cannot be used for storing batteries in general applications of the previous technique, and additional mechanical braking or clogging method (trying to reversely rotating the engine) is used for stopping the vehicles.

United States Patent document US5291960A, an application known in the state of the art, discloses that the energy obtained from the regenerative brakes and the engine in electrical/hybrid vehicles is used for charging the batteries. The energy generated more than required for charging the batteries is stored by converting into heat, and the said heat can be used in vehicle air conditioning system or engine cooling system. However, the document known in the state of the art does not provide a solution about storing hot heat and cold heat with a fluid changing phase by increasing or decreasing pressure utilizing the pressure of the vehicle hydraulic system.

United States Patent Document no US20090123815A1, an application known in the state of the art, discloses a heat storage system. The said heat storage system discloses storing heat by using PCM (phase changing materials), and the excessive energy obtained in this way can be stored in the storage system. However, the document known in the state of the art does not provide a solution about storing hot heat and cold heat with a fluid changing phase by increasing or decreasing pressure utilizing the pressure of the vehicle hydraulic system.

The Problems Solved with the Invention

The objective of the present invention is to provide a heating system which enables to store the excessive heat generated by the electric engine in electric vehicles at high speeds, and to use the stored heat at low speeds.

Another objective of the present invention is to provide a heating system which enables to heat the engine coolant used for cooling the electric engine. Detailed Description of the Invention

A heating system developed to fulfill the objective of the present invention is illustrated in the accompanying figure, in which:

Figure 1 is the schematic view of the heating system. The components shown in the figures are each given reference numbers as follows:

1. Heating system

2. Heat exchanger

3. Three-way valve

4. Serpentine

5. Circulation pump E. Electric engine

R. Radiator

H. Hydraulic pump

A heating system (1), which enables the waste heat and regenerative energy to be used again by storing as heat for electric vehicles, essentially comprises

at least one fluid the freezing point of which can be increased by increasing the pressure,

at least one heat exchanger (2) in which the phase changing fluid is filled, at least one three-way valve (3) one end of which is connected to the heat exchanger (2), and the other end of which is connected to the hydraulic pump

(H) of the steering system and which operates with electric control, at least one serpentine (4) which is connected to the outlet from the heat exchanger (2),

at least one circulation pump (5) which decreases the pressure of the liquid removing the heat on the electric engine (E) and thus increases its heat and sends in to the heat exchanger (2).

In the inventive heating system (1), optionally motor oil or olive oil can be used as fluid material the freezing point of which can be increased by increasing the pressure. The liquid having high temperature discharged from the heated electric engine (E) is sent to the circulation pump (5). The circulation pump (5) decreases the number of rotations and reduces the pressure applied on the liquid, and thus increases the heat of the liquid. The circulation pump (5) sends the liquid the heat of which is increased to the heat exchanger (2).

The high temperature of the fluid in the heat exchanger (2) is reduced by means of the low temperature water cooled in the radiator (R) and entering into the heat exchanger (2) from the serpentine (4).

The heat generated by the electric engine€ in cold weathers is stored in the heat exchanger (2). When the cabin is desired to be cooled in hot weathers, the connection of the three-way valve (3) coming from the hydraulic pump (H) in the hydraulic steering wheel system is turned on and the pressure in the heat exchanger (2) is enabled to be reduced. Upon the pressure of the fluid in the heat exchanger (2) being reduced, the melting temperature of the fluid also decrease, and thus the phase changing fluid is frozen by the coolants. The hydraulic system liquid coming from the hydraulic pump (H) is only used for increasing the pressure of the phase changing fluid by compressing it and enabling the phase changing material to change phase at a different temperature depending on the climate conditions. By this means, a heating system (1) is realized which enables to heat the engine coolant used for cooling the electric engine.

The liquid stored in the heat exchanger (2) when the vehicle is at high speed exits from the heat exchanger (2) by means of the liquid and enters into the serpentine (4) while the vehicle is moving at low speed. Serpentine enables the heat of the liquid at a constant temperature to remain constant. By this means, a heating system (1) is realized which enables to store the excessive heat generated by the electric engine in electric vehicles at high speeds, and to use the stored heat at low speeds.