Electric automobile cooling system and electric automobile

Abstract

The utility model discloses a cooling system of an electric automobile, which comprises an electronic water pump, an expansion kettle connected with the electronic water pump, a low-temperature radiator connected with the expansion kettle and a stepless electronic fan arranged opposite to the low-temperature radiator, and the electronic water pump and the low-temperature radiator are connected with an electric drive and electric control system assembly. The electric drive and electric control system assembly is located between the electronic water pump and the low-temperature radiator. The cooling system of the electric automobile is high in reliability, low in cost, high in degassing efficiency, good in manual filling performance and easy and convenient to arrange, and the cost of the whole automobile is reduced; a low-power electronic water pump and a stepless electronic fan which are matched with a miniature vehicle are adopted as circulating power, the power is accurately adjusted according to requirements, and the power consumption of the whole vehicle is reduced. The utility model further discloses an electric automobile.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobiles. Specifically, the utility model relates to an electric vehicle cooling system and an electric vehicle. Background Art

[0002] The maximum speed requirement of a micro electric vehicle is higher than 80 km / h, which meets the basic requirements of modern automobiles and the technical standard requirements of passenger cars in terms of safety.

[0003] In the prior art, the electric water pumps of the electric drive and electric control water cooling systems of many micro electric vehicles still match the electric water pumps with a power of 60 W according to the A0-class pure electric vehicle models; if a fully closed water cooling system structure is adopted, the expansion tank has a large volume and only plays the role of filling and replenishing water, resulting in an increase in the number of water pipes in the whole system and a relatively high cost of the whole water cooling system structure; if a semi-closed water cooling system structure is adopted, although the system cost is relatively low, the system performance reliability is low, and there are also difficulties in manual filling after-sales, resulting in maintenance complaints.

[0004] To sum up, the current cooling systems of micro electric vehicles have the following problems:

[0005] 1. The power of the matched electric water pump is too large and the cost is relatively high;

[0006] 2. The expansion tank of the traditional fully closed cooling system has a large volume, a complex circuit and a large number of water pipes;

[0007] 3. The performance reliability of the semi-closed cooling system is relatively low, and the difficulty in manual filling after-sales leads to maintenance complaints.

[0008] Chinese Patent with Application No. 202210655009.0 discloses a cooling system for an electric vehicle, which has: a first radiator mounted on the vehicle and capable of cooling a power unit driven by electricity; and a second radiator mounted on the vehicle and arranged on at least one of the vehicle width direction side and the vehicle width direction opposite side of the first radiator so as not to overlap with the first radiator when viewed from the vehicle front-rear direction, and capable of cooling an autonomous driving control device for controlling the autonomous driving of the vehicle.

[0009] It is desired to provide an improved electric vehicle cooling system, especially regarding how to reduce costs while ensuring high efficiency and reliability. Summary of the Utility Model

[0010] The utility model aims to solve at least one of the technical problems existing in the prior art. For this purpose, the utility model provides an electric vehicle cooling system with the aim of reducing costs.

[0011] To achieve the above object, the technical solution adopted by the present utility model is as follows: an electric vehicle cooling system, including an electronic water pump, an expansion tank connected to the electronic water pump, a low-temperature radiator connected to the expansion tank, and a stepless electronic fan arranged opposite to the low-temperature radiator, the electronic water pump and the low-temperature radiator are connected to the electric drive and electronic control system assembly, and the electric drive and electronic control system assembly is located between the electronic water pump and the low-temperature radiator.

[0012] A three-in-one power supply system is provided between the electric drive and electronic control system assembly and the electronic water pump.

[0013] The power of the electronic water pump is 20W.

[0014] The expansion tank includes a tank body and a pressure valve cover arranged on the tank body.

[0015] The tank body is connected to the low-temperature radiator and the electronic water pump.

[0016] The present utility model also provides an electric vehicle, including the above-mentioned electric vehicle cooling system.

[0017] The electric vehicle cooling system of the present utility model not only has high reliability and low cost, but also has high system degassing efficiency, good manual filling property, simple system layout, and reduces the vehicle cost; the circulating power adopts a small-power electronic water pump and a stepless electronic fan matching a mini car, and the power is accurately adjusted according to requirements, reducing the vehicle power consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] This specification includes the following drawings, and the shown contents are respectively:

[0019] Figure 1 It is a schematic structural diagram of the electric vehicle cooling system of the present utility model;

[0020] The marks in the figure are: 1. Expansion tank; 2. Electronic water pump; 3. Three-in-one power supply system; 4. Electric drive and electronic control system; 5. Low-temperature radiator; 6. Stepless electronic fan. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following is a more detailed description of the specific embodiments of the present utility model with reference to the drawings, aiming to help those skilled in the art have a more complete, accurate and in-depth understanding of the concept and technical solution of the present utility model, and contribute to its implementation.

[0022] As Figure 1As shown in the figure, the present utility model provides an electric vehicle cooling system, which includes an electronic water pump 2, an expansion tank 1 connected to the electronic water pump 2, a low-temperature radiator 5 connected to the expansion tank 1, and a stepless electronic fan 6 arranged opposite to the low-temperature radiator 5. The electronic water pump 2 and the low-temperature radiator 5 are connected to the electric drive and electronic control system 4 assembly, and the electric drive and electronic control system 4 assembly is located between the electronic water pump 2 and the low-temperature radiator 5.

[0023] Specifically, the present utility model provides a cooling system for a micro electric vehicle that is efficient, reliable, low-cost, and meets intelligent and precise control requirements. It can not only meet the cooling needs of each component of the power supply system, electric drive, and electronic control system 4 under different working conditions of the micro electric vehicle, but also control and adjust the electronic water pump 2 and the stepless electronic fan 6 through the VCU control unit, so that each power module and power source are within the optimal working temperature range under different working conditions, and at the same time ensure the lowest cost of the entire cooling system. The specific technical solutions are as follows.

[0024] As Figure 1 shown in the figure, a three-in-one power supply system 3 is arranged between the electric drive and electronic control system 4 assembly and the electronic water pump 2. The three-in-one power supply system 3, the electric drive and electronic control system 4 assembly, the low-temperature radiator 5, the expansion tank 1, and the electronic water pump 2 are connected in series to form a low-temperature cooling circuit, which constitutes the electric drive and electronic control cooling system of the electric vehicle.

[0025] The electric drive and electronic control cooling system uses an electronic water pump 2 with a power of 20W and a stepless electronic fan 6 controlled by PWM, which can adjust the power of the electronic water pump 2 and the fan according to the vehicle working conditions, reducing the power consumption of the whole vehicle. A special small-volume expansion tank 1 is designed and connected in series to the circuit. The expansion tank 1 not only plays the role of filling and replenishing water, but also the entire electric drive and electronic control water cooling system exhausts gas through the upper body of the expansion tank 1, and replenishes water and circulates through the coolant in the lower body of the expansion tank 1, thus reducing the investment of two water pipes, namely the exhaust water pipe and the makeup water pipe of the system. The structural characteristics of this system are not only highly reliable and low-cost, but also have high degassing efficiency, good manual filling performance, and simple system layout.

[0026] The detailed technical routes under each working condition are as follows:

[0027] 1. Vehicle startup and driving process:

[0028] When the vehicle is powered on and in a stationary state, since the electric drive and electronic control system 4 has no cooling requirement, the three-in-one power supply system 3 may generate a small amount of heat during the operation of converting high voltage to low voltage. At this time, the VCU control unit can control the electronic water pump 2 to operate, and the heat generated by the conversion of high voltage to low voltage in the three-in-one power supply system 3 can be dissipated through the coolant circulation.

[0029] As the vehicle starts, as the vehicle speed increases and the load increases, the electric drive and electronic control system 4 needs to dissipate more and more heat. During this process, the VCU will accurately adjust the power of the electric water pump 2 and the speed of the stepless electronic fan 6 according to the inlet water temperature of the three-in-one power supply system 3 to ensure that the three-in-one power supply system 3 and the electric drive and electronic control system 4 do not overheat under any operating conditions of the vehicle. During this cycle, the water pipe connecting the low-temperature radiator 5 and the expansion tank 1 not only carries the circulating flow of the coolant, but also discharges the air in the system to the upper tank of the expansion tank 1. When the air pressure in the upper tank of the expansion tank 1 is greater than the pressure valve cover opening value, the system pressure is relieved and exhausted through the pressure valve cover of the expansion tank 1 to ensure the pressure balance and reliability of the system. At the same time, the water pipe connecting the expansion tank 1 and the electric water pump 2 not only carries the circulating flow of the coolant, but also plays a role in replenishing water to the electric water pump 2, which also ensures the reliability of the system.

[0030] 2. Vehicle charging process:

[0031] When the vehicle is charging, the electronic control parts of the three-in-one power supply system 3 and the electric drive and electronic control system 4 have a heat dissipation requirement. The VCU control unit will accurately adjust the power of the electric water pump 2 and the speed of the stepless electronic fan 6 according to the charging rate of the battery pack and the inlet water temperature of the three-in-one power supply system 3. Under the condition of ensuring that the charging rate meets the requirements, the effect of reducing the power consumption of the whole vehicle is achieved.

[0032] The technical effects achieved by the present utility model are as follows:

[0033] 1. The electric drive and electronic control water cooling system is matched with a 20W power electric water pump 2 as the system driving power, reducing the system cost;

[0034] 2. The fully closed electric drive and electronic control water cooling system uses a special small-volume expansion tank 1 with a high level, and the expansion tank 1 is connected in series in the loop. The expansion tank 1 not only plays a role in filling and replenishing water, but also the entire electric drive and electronic control water cooling system exhausts air through the upper tank of the expansion tank 1, and replenishes water and circulates through the coolant in the lower tank volume of the expansion tank 1, thereby reducing the investment of two water pipes, namely the system exhaust water pipe and the water replenishing pipe. The structural characteristics of this system not only have high reliability and low cost, but also have high system degassing efficiency, good manual filling property, and simple system layout;

[0035] 3. The circulating power of the system uses an electric water pump 2 and a stepless electronic fan 6 controlled by PWM, and the power of the electric water pump 2 and the fan can be adjusted according to the vehicle operating conditions, reducing the power consumption of the whole vehicle.

[0036] The present utility model also provides an electric vehicle, including an electric vehicle cooling system with the above structure. This electric vehicle cooling system can be referred to Figure 1, which will not be elaborated here. Since the electric vehicle of the present utility model includes the electric vehicle cooling system in the above embodiments, it has all the advantages of the above electric vehicle cooling system.

[0037] The present utility model has been described exemplarily in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present utility model; or without improvement, the above concept and technical solution of the present utility model are directly applied to other occasions, they are all within the protection scope of the present utility model.

Claims

1. Electric vehicle cooling system, characterized in that: It includes an electronic water pump, an expansion pot connected to the electronic water pump, a low-temperature radiator connected to the expansion pot, and a stepless electronic fan arranged relative to the low-temperature radiator. The electronic water pump and the low-temperature radiator are connected to an electric drive and electric control system assembly, and the electric drive and electric control system assembly is located between the electronic water pump and the low-temperature radiator.

2. The electric vehicle cooling system according to claim 1, characterized in that: A three-in-one power supply system is arranged between the electric drive and electric control system assembly and the electronic water pump.

3. The electric vehicle cooling system according to claim 1, characterized in that: The power of the electronic water pump is 20W.

4. The electric vehicle cooling system according to any one of claims 1 to 3, characterized in that: The expansion pot comprises a pot body and a pressure valve cover arranged on the pot body.

5. The electric vehicle cooling system according to claim 4, characterized in that: The kettle body is connected with the low-temperature radiator and the electronic water pump.

6. An electric vehicle, characterized in that: The electric vehicle cooling system comprises any one of claims 1 to 5.

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