CN106028762A - A dual cooling integrated system for electric vehicle control system - Google Patents

Abstract

The invention discloses a double-cooling comprehensive system for an electric car control system. The double-cooling comprehensive system comprises a water cooling radiator having a heat exchange water tank, a water supply system and a heat radiation system, a semiconductor refrigeration sheet having a surface generating high temperature and contacting with a heat exchange surface of the heat exchange water tank and a surface generating low temperature and contacting with the heat radiating surface of the electric car control system, a temperature sensor for detecting the temperature of the electric car control system, and a CPU master control module, of which the input end is electrically connected with the output end of the temperature sensor and the output end is respectively and electrically connected with the semiconductor refrigeration sheet, the water supply system and the heat radiation system. Heat generated by the electric car control system is transmitted to the heat radiation surface, the surface, of the semiconductor refrigeration sheet, generating low temperature cools the electric car control system, and heat generated by the surface, of the semiconductor refrigeration sheet, generating high temperature is transmitted to the heat exchange surface of the heat exchange water tank to complete heat exchange. Cooling water is conveyed to the heat radiation system through a pipeline. Under the effect of fans, heat can be rapidly radiated to the surrounding environment.

Description

A dual cooling integrated system for electric vehicle control system

technical field

The invention belongs to the technical field of cooling, and in particular relates to a dual-cooling comprehensive system used in an electric vehicle control system.

Background technique

With the country's policy encouragement for electric vehicle companies and the introduction of financial subsidy policies for units and individuals to purchase electric vehicles, electric vehicle manufacturers are producing more and more electric vehicles, especially high-power electric vehicles. The main components of electric vehicles are drive motors, controllers and battery packs. The greater the power of the electric vehicle, the greater the power of the drive module used by the electric vehicle controller. During the use of the high-power drive module, due to the frequent opening and closing of the thyristor or IGBT, more heat is generated. If the heat generated by the thyristor or IGBT is not dissipated in time, the heat generated by the thyristor or IGBT will accumulate, causing the temperature of the driving module to rise. The temperature of the drive module rises, and the consequence is that the efficiency of the controller is greatly reduced, and even the controller itself is burned out due to the excessive temperature.

The method currently used to reduce the temperature of high power control systems is to cool the system with water. Due to the large inertia coefficient of the water cooling system, the heat dissipation efficiency is low, especially the water cooling system cannot produce a source of absorbed heat lower than the ambient temperature, so it cannot meet the temperature adjustment of the high-power controller, and ultimately affects the normal operation of the electric vehicle control system Work.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art and provide a dual-cooling integrated system for electric vehicle control systems, which can absorb a large amount of heat generated by the control system in a timely and efficient manner so as to reduce the operating temperature of the control system.

In order to solve the problems of the prior art, the present invention discloses a dual cooling integrated system for electric vehicle control system, including:

A water-cooled radiator, including a heat exchange water tank, a water pump, at least one fan, a number of cooling fins located at the air outlet of the fan, and condensation pipes pierced in the cooling fins; the condensation pipe, the water pump, and the heat exchange water tank are connected end to end to form a water circulation loop;

The semiconductor cooling chip has a high-temperature surface and a low-temperature surface, the low-temperature surface is in contact with the heat dissipation surface of the electric vehicle control system, and the high-temperature surface is in contact with the heat exchange surface of the heat exchange water tank;

The temperature sensor is used to detect the temperature of the electric vehicle control system;

CPU main control module, its input end is electrically connected with the output end of the temperature sensor, and its output end is respectively electrically connected with the semiconductor cooling chip, the water pump and the fan to control its work.

Preferably, the water-cooled radiator further includes a liquid storage tank, the liquid storage tank is connected between the water pump and the condensation pipe, and the liquid storage tank has a water filling port.

Preferably, all components participating in the water circulation in the water cooling radiator are connected by connecting hoses.

Preferably, both the heat exchange surface of the heat exchange water tank and the heat dissipation surface of the control system of the electric vehicle have recesses that limit the movement of the semiconductor cooling fins.

Preferably, the condensation pipe is formed by serially connecting multiple sets of S-shaped pipes.

Preferably, the electric vehicle control system includes a controller housing, and the heat dissipation surface of the electric vehicle control system is the top surface of the controller housing.

Preferably, the heat exchange water tank and the controller shell are fixed by bolts, and a semiconductive cooling chip is installed between the heat exchange water tank and the controller shell.

Preferably, the temperature sensor is fixed in the controller housing by bolts.

Preferably, a spring washer is also arranged between the bolt and the object to be fixed.

The beneficial effect that the present invention has:

1. The heat generated by the drive module of the electric vehicle control system is conducted to the heat dissipation surface, and the low-temperature surface of the semiconductor refrigeration sheet is used to cool the electric vehicle control system, and the heat generated by the high-temperature surface of the semiconductor refrigeration sheet is conducted to the heat exchange tank for heat exchange The heat exchange is completed on the surface, and the cooling water is transported to the heat dissipation system through the pipeline. Under the action of the fan, the heat is quickly dissipated to the surrounding environment.

2. The temperature sensor detects the temperature of the electric vehicle control system, and transmits the detection signal to the CPU main control module. The CPU main control module controls the water pump, fan and semiconductor cooling chip respectively, and then changes the flow rate, speed and cooling capacity, and finally timely and efficient Reduce the temperature of the electric vehicle control system.

Description of drawings

Fig. 1 is a structural principle diagram of the present invention;

Fig. 2 is the bottom view of the heat exchange water tank in the present invention;

Fig. 3 is the front view of heat exchange water tank in the present invention;

Fig. 4 is the top view of the heat exchange water tank in the present invention;

Fig. 5 is a partial view of the position where the semiconductor refrigeration chip is installed in the controller shell of the present invention.

Reference signs:

1 heat exchange water tank; 1.1 first recessed part; 2 semiconductor cooling plate; 3 controller shell; 3.1 second recessed part; 4 drive module; 5 temperature sensor; 6 CPU main control module; 7 cooling system; 8 fan; 9 heat sink ; 10 condensation pipe; 11 water supply system; 12 liquid storage tank; 13 water pump.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

In describing the present invention, it is to be understood that the terms "radial", "axial", "left", "right", "upper", "lower", "top", "bottom", "inner" The orientation or positional relationship indicated by , "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation , constructed and operated in a particular orientation and therefore should not be construed as limiting the invention. In the description of the present invention, unless otherwise specified, the meanings of "plurality" and "several" both refer to two or more than two.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; either directly or indirectly through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

As shown in Figures 1 to 5, a dual-cooling integrated system for electric vehicle control system, the electric vehicle control system includes the controller shell 3 and the drive module 4 in the controller shell 3, etc., the heat dissipation surface of the electric vehicle control system It is the top surface of the controller shell 3. Specifically, the dual cooling integrated system includes:

The water-cooled radiator has a heat exchange water tank 1, a water supply system 11 and a heat dissipation system 7, and the above three are connected by pipelines to form a water circulation loop.

The water supply system 11 includes a liquid storage tank 12 and a water pump 13, and the liquid storage tank 12 has a water filling port for replenishing cooling water in time.

The cooling system 7 includes two fans 8 , several cooling fins 9 located at the air outlets of the fans 8 , and condensation pipes 10 passing through the cooling fins 9 . The condensing pipe 10 is composed of multiple groups of S-shaped pipes connected in series in sequence, and the condensing pipe 10, the liquid storage tank 12, the water pump 13 and the heat exchange water tank 1 are connected end to end in order to form a water circulation loop.

The various components participating in the water circulation in the water-cooled radiator are connected by connecting hoses, so that the layout adjustment of the components in the spatial position can be realized to optimize the arrangement of the system in the electric vehicle.

The water inlet and the water outlet on the heat exchange water tank are opened on the two side walls respectively, wherein, the design height of the water outlet is equal to the design height of the water inlet, in order to ensure that there is enough cooling water in the heat exchange water tank to participate in heat exchange.

The semiconductor refrigerating sheet 2 has a surface generating high temperature and a surface generating low temperature, the surface generating low temperature is in contact with the top surface of the controller housing 3, and the surface generating high temperature is in contact with the heat exchange surface of the heat exchange water tank 1.

The temperature sensor 5 is fixed in the controller housing 3 by bolts, and is used to detect the temperature of the electric vehicle control system, especially the drive module 4;

CPU master control module 6, it has an input end and a plurality of output ends, and input end is electrically connected with the output end of temperature sensor 5, and output end is respectively electrically connected with semi-conductor cooling chip 2, fan 8 and water pump 13 to connect and control its work .

The heat exchange surface of the heat exchange water tank 1 has a first recessed portion 1.1, and the heat dissipation surface of the electric vehicle control system has a second recessed portion 3.1. The above-mentioned recessed portion can limit its movement when it cooperates with the semiconductor cooling plate 2, thereby achieving good fixation .

The heat exchange water tank 1 and the controller housing are fixed by bolts, and a semiconductor cooling chip is clamped between the heat exchange water tank and the controller housing, that is, the semiconductor cooling chip is firmly fixed to the controller housing by the clamping force of the heat exchange water tank. While fixing with bolts, spring washers are also used to prevent the bolts from loosening and improve the self-locking performance of the bolts.

Working principle and process of the present invention

The temperature sensor 5 is arranged near the driving module 4, and the temperature signal S1 detected by it is transmitted to the CPU main control module 6 through wires, and the CPU main control module 6 processes the temperature signal to calculate the temperature value.

The higher the temperature detected by the temperature sensor 5, the greater the average current value of the driving current I1 transmitted by the CPU main control module 6 to the peltier 2 through the wire, and the greater the cooling intensity of the peltier 2.

The CPU main control module 6 transmits the driving current I3 and the driving current I4 to the two fans 8 respectively through wires. The larger the current value is, the faster the rotating speed of the fans 8 is, and the faster the heat dissipation speed of the condenser pipe 10 and the heat sink 9 is. The higher the temperature detected by the temperature sensor 5 is, the greater the values of the driving current I3 and the driving current I4 are, and the higher the rotation speed of the fan 8 is.

The CPU main control module 6 transmits the drive current I2 to the water pump 13 through wires. The larger the value of the drive current I2, the faster the speed of the water pump 13, and the faster the water inlet and outlet speed of the water pump 13. The higher the temperature detected by the temperature sensor 5 is, the greater the value of the driving current I2 is, and the higher the rotational speed of the water pump 13 is.

The water in the water cooling system has a large specific heat capacity. Under the same volume of coolant, water can absorb more heat. However, due to the large specific heat capacity of water, the thermal inertia coefficient of the water cooling system is large and the heat dissipation efficiency is low. Especially It is the water cooling system that cannot produce a source of absorbed heat that is cooler than the ambient temperature. The semiconductor refrigerating sheet 2 in this integrated system produces a low-temperature surface, which can generate a heat absorption source lower than the ambient temperature, and the specific temperature of the low-temperature surface generated by the semiconductor refrigerating sheet 2 can be controlled by the CPU main control module 6, combined with the semiconductor refrigerating sheet 2 and the advantages of the water cooling system to achieve the purpose of reducing the operating temperature of the electric vehicle control system in a timely and efficient manner and creating a good operating environment.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made. It should also be regarded as the protection scope of the present invention.

Claims (9)

1. A dual cooling integrated system for electric vehicle control system, characterized in that: comprising: A water-cooled radiator, including a heat exchange water tank, a water pump, at least one fan, a number of cooling fins located at the air outlet of the fan, and condensation pipes pierced in the cooling fins; the condensation pipe, the water pump, and the heat exchange water tank are connected end to end to form a water circulation loop; The semiconductor cooling chip has a high-temperature surface and a low-temperature surface, the low-temperature surface is in contact with the heat dissipation surface of the electric vehicle control system, and the high-temperature surface is in contact with the heat exchange surface of the heat exchange water tank; The temperature sensor is used to detect the temperature of the electric vehicle control system; CPU main control module, its input end is electrically connected with the output end of the temperature sensor, and its output end is respectively electrically connected with the semiconductor cooling chip, the fan and the water pump to control its work. 2. A dual-cooling integrated system for electric vehicle control systems according to claim 1, characterized in that: the water-cooled radiator also includes a liquid storage tank, the liquid storage tank is connected between the water pump and the condensation pipe, and the liquid storage The tank has a water filling port. 3. A dual-cooling integrated system for an electric vehicle control system according to claim 2, characterized in that: the various components participating in the water circulation in the water-cooled radiator are connected by connecting hoses. 4. A kind of dual cooling integrated system for electric vehicle control system according to claim 1, characterized in that: the heat exchange surface of the heat exchange water tank and the heat dissipation surface of the electric vehicle control system all have Depression. 5. A dual-cooling integrated system for an electric vehicle control system according to claim 1, wherein the condensation pipe is composed of multiple sets of S-shaped pipes connected in series. 6. A dual-cooling integrated system for an electric vehicle control system according to claim 1, wherein the electric vehicle control system includes a controller housing, and the heat dissipation surface of the electric vehicle control system is the top surface of the controller housing . 7. A dual-cooling integrated system for electric vehicle control system according to claim 5, characterized in that: the heat exchange water tank and the controller shell are fixed by bolts, and there is a clamp between the heat exchange water tank and the controller shell semiconductor cooler. 8. A dual-cooling integrated system for an electric vehicle control system according to claim 5, wherein the temperature sensor is fixed in the controller housing by bolts. 9. A dual-cooling integrated system for electric vehicle control system according to claim 7 or 8, characterized in that: a spring washer is also arranged between the bolt and the object to be fixed.