CN117828748A - Electric automobile radiator selection method - Google Patents
Electric automobile radiator selection method Download PDFInfo
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- CN117828748A CN117828748A CN202311691704.3A CN202311691704A CN117828748A CN 117828748 A CN117828748 A CN 117828748A CN 202311691704 A CN202311691704 A CN 202311691704A CN 117828748 A CN117828748 A CN 117828748A
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- radiator
- calculating
- cooling liquid
- air
- selecting
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- 238000010187 selection method Methods 0.000 title claims abstract description 6
- 239000000110 cooling liquid Substances 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000005484 gravity Effects 0.000 claims description 12
- YBJHBAHKTGYVGT-ZKWXMUAHSA-N (+)-Biotin Chemical compound N1C(=O)N[C@@H]2[C@H](CCCCC(=O)O)SC[C@@H]21 YBJHBAHKTGYVGT-ZKWXMUAHSA-N 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 4
- FEPMHVLSLDOMQC-UHFFFAOYSA-N virginiamycin-S1 Natural products CC1OC(=O)C(C=2C=CC=CC=2)NC(=O)C2CC(=O)CCN2C(=O)C(CC=2C=CC=CC=2)N(C)C(=O)C2CCCN2C(=O)C(CC)NC(=O)C1NC(=O)C1=NC=CC=C1O FEPMHVLSLDOMQC-UHFFFAOYSA-N 0.000 claims description 4
- 230000005855 radiation Effects 0.000 abstract description 6
- 230000017525 heat dissipation Effects 0.000 description 6
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The invention discloses a type selection method of an electric automobile radiator, which comprises the following steps: s1, calculating the flow of cooling liquid of a cooling system; s2, calculating the required air quantity of the cooling system; s3, determining the size of a radiator core according to the whole vehicle boundary; s4, calculating wind speed; s5, summarizing performance parameter requirements of the radiator; s6, selecting a radiator. According to the method for selecting the type of the electric automobile radiator, the radiator is reasonably and accurately selected in the early design stage by optimizing the radiator type selection calculation flow, so that the influence of insufficient heat radiation performance on the kinetic energy output or heat radiation performance redundancy of the electric drive is avoided, and the cost is increased.
Description
Technical Field
The invention belongs to the technical field of automobile thermal management systems, and particularly relates to a type selection method for a radiator of an electric automobile.
Background
The radiator is an indispensable important part in the water-cooling electric drive cooling system of the electric automobile, and is a heat exchange device which is used for radiating the excessive heat carried by the cooling liquid in the electric drive water jacket into the air through heat exchange under the action of external forced air flow from the heat absorbed by the high-temperature parts; the heating component in the electric drive mainly comprises a motor and a controller.
Whether the type of the electric automobile radiator is reasonably and directly influenced the dynamic property and the reliability of the electric drive. When the radiator is selected, if the radiating capacity of the radiator is lower than the radiating capacity of the electric drive, the radiating capacity of the radiator is insufficient, the kinetic energy output of the electric drive is directly affected, and even the electric drive internal controller is damaged; if the heat dissipation amount of the radiator is higher than the heat dissipation amount of the electric drive, the heat dissipation performance of the radiator is redundant, and the cost is increased.
For thermal management engineers, how to reasonably and accurately select the radiator in the early design stage has become a main requirement. In the prior art, a technical means for reasonably and accurately selecting the radiator is lacking.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a method for selecting the radiator of the electric automobile, which aims to reasonably and accurately select the radiator in the front design stage of the electric automobile.
In order to solve the technical problems, the invention adopts the following technical scheme: the electric automobile radiator type selection method comprises the following steps:
s1, calculating the flow of cooling liquid of a cooling system;
s2, calculating the required air quantity of the cooling system;
s3, determining the size of a radiator core according to the whole vehicle boundary;
s4, calculating wind speed;
s5, summarizing performance parameter requirements of the radiator;
s6, selecting a radiator.
Said step S1, the heat release quantity Q of the electric drive is known W Temperature rise delta t of cooling liquid w Specific gravity gamma of cooling liquid w And specific heat C of cooling liquid w According to the formulaCalculating the flow V of the cooling liquid w 。
In the step S2, the heat release Q of the electric drive is known W Air temperature rise delta t a Specific gravity gamma of air a And specific heat of air C a According to the formulaCalculate the required air volume V of the cooling system a 。
In step S3, the radiator core size is known to obtain the radiator core height H and the core width B, and the core positive area s=h·b is calculated.
In the step S4, the required air volume V of the cooling system calculated in the step S2 is calculated a And the core volume S calculated in the step S3, according to the formulaAnd calculating the wind speed V.
In the step S5, the summarized performance parameters of the radiator include wind speed, coolant flow and heat release of the electric drive.
The step S1 includes:
s11, obtaining rated heat release Q of electric drive Rated for ；
S12, setting a safety coefficient S, and calculating the heat release quantity Q of the electric drive W ＝S*Q Rated for ；
S13, determining the temperature rise delta t of the cooling liquid w Specific gravity gamma of air a And specific heat of air C a ；
S14, calculating the flow V of the cooling liquid w 。
In the step S12, the safety factor S is 1.2 to 1.5.
In the step S13, the temperature rise Deltat of the cooling liquid w Is 2-5 ℃.
According to the method for selecting the type of the electric automobile radiator, the radiator is reasonably and accurately selected in the early design stage by optimizing the radiator type selection calculation flow, so that the influence of insufficient heat radiation performance on the kinetic energy output or heat radiation performance redundancy of the electric drive is avoided, and the cost is increased.
Drawings
Fig. 1 is a flowchart of a method for selecting a radiator of an electric vehicle according to the present invention.
Detailed Description
In order that the invention may be more fully understood, a more particular description of the invention will be rendered by reference to the appended drawings, in which several embodiments of the invention are illustrated, but which may be embodied in different forms and are not limited to the embodiments described herein, which are, on the contrary, provided to provide a more thorough and complete disclosure of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly connected to one of ordinary skill in the art to which this invention belongs, and the knowledge of terms used in the description of this invention herein for the purpose of describing particular embodiments is not intended to limit the invention, and the term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the invention provides a method for selecting the type of a radiator of an electric automobile, which comprises the following steps:
s1, calculating the flow of cooling liquid of a cooling system;
s2, calculating the required air quantity of the cooling system;
s3, determining the size of a radiator core according to the whole vehicle boundary;
s4, calculating wind speed;
s5, summarizing performance parameter requirements of the radiator;
s6, selecting a radiator.
Specifically, in step S1, the heat release amount Q of the electric drive of the electric vehicle is known W Temperature rise delta t of cooling liquid of cooling system w Cold waterSpecific gravity gamma of the liquid w And specific heat C of cooling liquid w According to the formulaCalculating the flow V of the cooling liquid w 。
The step S1 includes:
s11, obtaining rated heat release Q of electric drive Rated for The method comprises the steps of carrying out a first treatment on the surface of the The electric drive of the electric automobile mainly comprises a motor, a transmission mechanism and the like;
s12, setting a safety coefficient S, and calculating the heat release quantity Q of the electric drive W ＝S*Q Rated for ；
S13, determining the temperature rise delta t of the cooling liquid w Specific gravity gamma of air a And specific heat of air C a ；
S14, according to the formulaCalculating the flow V of the cooling liquid w 。
In the step S12, the safety factor S is 1.2 to 1.5.
Preferably, in the step S12, the safety factor S is 1.3, thus Q W ＝1.3*Q Rated for . In order to prevent overload of a vehicle and running under the working condition of the gradient of more than 9%, the instantaneous heat release quantity of the motor is increased, so that the motor is limited to be twisted or overheated, the safety coefficient of 1.2-1.5 is set, and the safety is improved.
In the above step S13, the temperature rise Δt of the coolant of the general electric vehicle w Is 2-5 ℃.
In the above step S13, the air specific gravity γ a And specific heat of air C a Is an inherent characteristic parameter of the cooling liquid.
In the above step S2, the heat release amount Q of the electric drive is known W Air temperature rise delta t a Specific gravity gamma of air a And specific heat of air C a According to the formulaCalculate the required air volume V of the cooling system a 。
The step S2 includes:
s21, determining air temperature rise delta t a ；
S22, determining the specific gravity gamma of the air a And specific heat of air C a According to the formulaCalculate the required air volume V of the cooling system a 。
In the above step S21, the air temperature rise Δt of the general electric vehicle a Is 4-8 ℃.
In the above step S22, the air specific gravity γ a And specific heat of air C a Is an air inherent characteristic parameter.
In step S3, the radiator core size is known, the radiator core height H and the core width B are obtained, and the core positive area s=h·b is calculated.
The step S3 includes:
s31, measuring the boundary of a front cabin of the electric automobile;
s32, selecting a radiator which can be arranged in the front cabin from existing mature products, and obtaining the core body height H and the core body width B of the radiator.
In the above step S31, the radiator is generally disposed in the front cabin of the electric vehicle, and thus it is necessary to measure the front cabin boundary of the electric vehicle.
In the above step S4, the cooling system required air volume V calculated in step S2 is calculated a And the core volume S calculated in step S3, according to the formulaAnd calculating the wind speed V.
The step S4 includes:
s41, calculating the positive area S=H.B of the radiator core;
s42, according to the required air volume V of the cooling system in the step S22 a The front area S of the radiator core in the step S41 is calculated according to the formulaThe wind speed V is calculated.
In the above step S5, the summarized radiator performance parameters include the wind speed V, the coolant flow V w And the heat release quantity Q of electric drive w 。
In the step S6, the wind speed V and the flow V of the cooling liquid are detected in the heat dissipation performance parameter table of the existing mature product w The heat dissipation capacity is greater than or equal to the heat dissipation capacity Q of the electric drive w The heat sink meets the requirements.
According to the invention, the radiator is reasonably and accurately selected in the early design stage by optimizing the radiator model selection calculation flow, so that the influence of insufficient heat radiation performance on the kinetic energy output of the electric drive or the heat radiation performance redundancy is avoided, and the cost is increased.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the above embodiments, but is capable of being modified or applied directly to other applications without modification, as long as various insubstantial modifications of the method concept and technical solution of the invention are adopted, all within the scope of the invention.
Claims (9)
1. The electric automobile radiator type selection method is characterized by comprising the following steps:
s1, calculating the flow of cooling liquid of a cooling system;
s2, calculating the required air quantity of the cooling system;
s3, determining the size of a radiator core according to the whole vehicle boundary;
s4, calculating wind speed;
s5, summarizing performance parameter requirements of the radiator;
s6, selecting a radiator.
2. The method according to claim 1, wherein in the step S1, the heat release Q of the electric motor is known W Temperature rise delta t of cooling liquid w Specific gravity gamma of cooling liquid w And specific heat C of cooling liquid w According to the formulaCalculating the flow V of the cooling liquid w 。
3. The method according to claim 1, wherein in the step S2, the heat release Q of the electric motor is known W Air temperature rise delta t a Specific gravity gamma of air a And specific heat of air C a According to the formulaCalculate the required air volume V of the cooling system a 。
4. A method for selecting a radiator for an electric vehicle according to any one of claims 1 to 3, wherein in the step S3, the radiator core size is known to obtain a radiator core height H and a core width B, and the core positive area s=h·b is calculated.
5. A method for selecting a radiator for an electric vehicle according to any one of claims 1 to 3, wherein in the step S4, the required air volume V of the cooling system calculated in the step S2 is calculated a And the core volume S calculated in the step S3, according to the formulaAnd calculating the wind speed V.
6. A method for selecting a radiator for an electric vehicle according to any one of claims 1 to 3, wherein in the step S5, the summarized radiator performance parameters include wind speed, coolant flow rate, and heat release of electric drive.
7. A method for selecting a radiator for an electric vehicle according to any one of claims 1 to 3, wherein the step S1 includes:
s11, obtaining rated heat release Q of electric drive Rated for ；
S12, setting a safety coefficient S, and calculating the heat release quantity Q of the electric drive W ＝S*Q Rated for ；
S13, determining the temperature rise delta t of the cooling liquid w Specific gravity gamma of air a And specific heat of air C a ；
S14, calculating the flow V of the cooling liquid w 。
8. The method according to claim 7, wherein in the step S12, the safety factor S is 1.2-1.5.
9. The method according to claim 7, wherein in the step S13, the temperature rise of the cooling liquid is Δt w Is 2-5 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311691704.3A CN117828748A (en) | 2023-12-11 | 2023-12-11 | Electric automobile radiator selection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311691704.3A CN117828748A (en) | 2023-12-11 | 2023-12-11 | Electric automobile radiator selection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117828748A true CN117828748A (en) | 2024-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311691704.3A Pending CN117828748A (en) | 2023-12-11 | 2023-12-11 | Electric automobile radiator selection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117828748A (en) |
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2023
- 2023-12-11 CN CN202311691704.3A patent/CN117828748A/en active Pending
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