Heat dissipation of lithium battery device for electric car
Technical field
The present invention relates to electric automobile lithium batteries, and in particular to the heat dissipation of lithium battery device for electric car.
Background technique
With the increase of industrial development and social demand, automobile plays important angle in social progress and economic development
Color.The rapid development of auto industry has pushed the development of the important industry such as machinery, the energy, rubber, steel, but simultaneously also increasingly
It is faced with the serious problems of environmental protection, energy shortage.In order to solve these problems, electric car obtain significant progress and
Very big technological progress, at the same electric car battery system, power drive system and in terms of all achieve it is very big
Progress.
On electric car, battery system is the component of a key core, and battery is as power source, it would be desirable to be able to be measured close
Degree is high, output power density is high, operating temperature range is broad, have extended cycle life, memory-less effect, self-discharge rate are small.Lithium at present
Battery is because of its superior performance, in electric car field by large-scale use.Lithium battery possesses plurality of advantages, but also has fatal
Property the shortcomings that, be exactly that stability test is poor, spontaneous combustion and explosion easily occur in extreme circumstances, at present lithium electricity for electric vehicle
Pond enhancing heat dissipation mostly uses the mode for increasing compressor flow, this mode waste of resource, and compressor flow to increase many times
Heat dissipation of lithium battery can not effectively be enhanced.
Summary of the invention
The technical problem to be solved by the present invention is to lithium battery enhancings for electric vehicle at present to radiate taken mode not
Heat dissipation of lithium battery can effectively be enhanced, while waste of resource is, and it is an object of the present invention to provide be used for the heat dissipation of lithium battery device of electric car, solution
The certainly above problem.
The present invention is achieved through the following technical solutions:
For the heat dissipation of lithium battery device of electric car, including cooling fin;The cooling fin includes rib, radiating ribs and dissipates
Hot tooth;The radiating ribs are arranged on rib;The shape of the radiating ribs be triangle, and an angle of the triangle meet to
The opposite side in radiating airflow direction, the angle deviates from radiating airflow direction;The radiation tooth is arranged in radiating ribs;The radiation tooth
Shape is triangle, and an angle of the triangle is met to radiating airflow direction, and the opposite side at the angle deviates from radiating airflow direction.
In the prior art, lithium battery enhancing heat dissipation for electric vehicle mostly uses the mode for increasing compressor flow, this mode
Waste of resource, and inventor has found that compressor flow increase many times can not effectively enhance lithium battery in actual practice
Heat dissipation.Inventor's radiating airflow according to caused by Hydrodynamics Theory and test of many times discovery blower is flowing through what needs radiated
When position, boundary layer can be formed at the position;The flowing of the radiating airflow as caused by blower is relatively stable, and heat transmission gas
The position smoother (such as lithium battery surface and common cooling fin) that flowed through needs radiate is flowed, so the radiating airflow
Reynolds number it is smaller;According to boundary layer theory, thickness and the Reynolds number in boundary layer are inversely proportional, thus the boundary layer of radiating airflow compared with
Thickness, it is poor to the heat dissipation effect of smooth surface.Although and radiating airflow Reynolds number can be increased by increasing compressor flow, Reynolds
Number is directly proportional to the speed of radiating airflow, increases the Reynolds number that twice blower flow velocity can only double, inefficiency.Simultaneously
Inventors have found that the flow velocity for flowing through the radiating airflow at heat dissipation position tends towards stability, a large amount of to radiate with the increase of blower flow velocity
Air-flow does not carry out heat exchange, so compressor flow increase many times can not effectively enhance heat dissipation of lithium battery.
The present invention is in application, the shape of radiating ribs is triangle, and an angle of the triangle is met to radiating airflow direction,
The opposite side at the angle deviates from radiating airflow direction, and radiating airflow first flows through an angle of the triangle, so when flowing through radiating ribs
Vortex is generated around radiating ribs and at the opposite side at the angle afterwards, since the fluid at vortex is rotated around a vortex core, according to
Fluid momentum law of conservation, the fluid flow rate at this greatly improve, and inventor carries out CFD according to simulation softward fluent.ansys
Simulation discovery, the fluid Reynolds number at this is 10~30 times of radiating airflow Reynolds number, so the thickness in boundary layer is reduced to
10%~3%, heat dissipation effect substantially enhances.Meanwhile the shape of radiation tooth is triangle, and an angle of the triangle is met to scattered
The opposite side in thermal current direction, the angle deviates from radiating airflow direction, and radiating airflow first flows through the triangle when flowing through radiation tooth
An angle, then pass around radiation tooth and at the opposite side at the angle generate vortex, since the fluid at vortex is in a vortex
Heart rotation, same to radiating ribs, the fluid Reynolds number at this is 10~30 times of radiating airflow Reynolds number, so the thickness in boundary layer drops
Down to 10%~3%, heat dissipation effect substantially enhances.
The present invention effectively enhances heat dissipation of lithium battery, simultaneously by the way that radiating ribs and radiation tooth are shaped to triangle
Under the premise of not increasing compressor flow, heat dissipation of lithium battery effect is improved.
Further, the quantity of the radiating ribs is two or more;The size of the radiating ribs is along radiating airflow direction
It is sequentially increased.
The present invention is in application, the size of two or more radiating ribs is sequentially increased along radiating airflow direction, radiating airflow stream
After through cooling fin and being radiated, temperature can be improved, and when flowing through next cooling fin, heat dissipation effect can be reduced.Then it invents
People has found by creative work, and the size of radiating ribs is sequentially increased along radiating airflow direction, can radiating airflow be existed
When being flowed through next cooling fin after the heating of previous cooling fin, heat dissipation area increases, while the cooling fin is to radiating airflow
Disturbance increases, so that the vortex Reynolds number generated at the cooling fin increases, improves heat dissipation effect.The present invention by by two and
The size of the above radiating ribs is sequentially increased along radiating airflow direction, is realized the Homogeneouslly-radiating of cooling fin, is improved lithium battery
Radiating efficiency and safety.
Further, the invention also includes lithium battery, heat conducting pipe and heat dissipation tanks;The cooling fin is arranged by heat conducting pipe
Lithium battery side;The lithium battery, heat conducting pipe and cooling fin are arranged inside heat dissipation tank.
Further, the invention also includes air intake blower fans and the first wind scooper;The outlet air end of the air intake blower fan passes through
It is connected to inside first wind scooper and heat dissipation tank;The geomery of the one end of first wind scooper towards air intake blower fan outlet air end with
The geomery of air intake blower fan outlet air end matches;The geomery of the one end of first wind scooper towards heat dissipation tank and heat dissipation
The geomery of case towards the opening of the first wind scooper matches;The size of the heat dissipation tank towards the opening of the first wind scooper is big
In the size of air intake blower fan outlet air end.
In actual operation, when inventor's discovery passes through air-cooled radiate to lithium battery, the size of blower is less than lithium electricity
The size in pond causes heat dissipation of lithium battery uneven, is easy to happen so that radiating airflow can not flow uniformly through each position of lithium battery
It is dangerous.The present invention is in application, air intake blower fan is connected to by the first wind scooper and heat dissipation tank inside, and the first wind scooper is by air intake blower fan
The radiating airflow of blowout uniformly diffuses in heat dissipation tank, so that the heat dissipation of lithium battery is more uniform, the safety is improved.
Further, the invention also includes air-out blower fans and the second wind scooper;The air intake of the air-out blower fan passes through
It is connected to inside second wind scooper and heat dissipation tank;The geomery of the one end of second wind scooper towards air-out blower fan air intake with
The geomery of air-out blower fan air intake matches;The geomery of the one end of second wind scooper towards heat dissipation tank and heat dissipation
The geomery of case towards the opening of the second wind scooper matches;The size of the heat dissipation tank towards the opening of the second wind scooper is big
In the size of air-out blower fan air intake.
In actual operation, when inventor's discovery passes through air-cooled radiate to lithium battery, air blast cooling good heat dissipation effect
In passive wind-cooling heat dissipating.The present invention is in application, air-out blower fan passes through the second wind scooper and heat dissipation tank inside is connected to, the first wind-guiding
Cover, heat dissipation tank and the second wind scooper form complete heat dissipation wind channel, so that the flowing of radiating airflow is more uniform, so that
The heat dissipation of lithium battery is more uniform, and the safety is improved.
Compared with prior art, the present invention having the following advantages and benefits:
1, the present invention is used for the heat dissipation of lithium battery device of electric car, by being shaped to radiating ribs and radiation tooth
Triangle, effectively enhancing heat dissipation of lithium battery, while under the premise of not increasing compressor flow, improve heat dissipation of lithium battery effect;
2, the present invention is used for the heat dissipation of lithium battery device of electric car, by dissipating the size edge of two or more radiating ribs
Thermal current direction is sequentially increased, and realizes the Homogeneouslly-radiating of cooling fin, improves radiating efficiency and the safety of lithium battery;
3, the present invention is used for the heat dissipation of lithium battery device of electric car, the heat transmission gas that the first wind scooper blows out air intake blower fan
Stream uniformly diffuses in heat dissipation tank, so that the heat dissipation of lithium battery is more uniform, the safety is improved;
4, the present invention is used for the heat dissipation of lithium battery device of electric car, the first wind scooper, heat dissipation tank and the second wind scooper shape
At complete heat dissipation wind channel, so that the flowing of radiating airflow is more uniform, so that the heat dissipation of lithium battery is more uniform, peace
Full property improves.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings:
Fig. 1 is schematic structural view of the invention;
Fig. 2 is cooling fin structural schematic diagram of the present invention.
Label and corresponding parts title in attached drawing:
1- cooling fin, 2- heat conducting pipe, the first wind scooper of 3-, 4- air intake blower fan, 5- lithium battery, 6- heat dissipation tank, 7- second are led
Fan housing, 8- air-out blower fan, 11- rib, 12- radiating ribs, 13- radiation tooth.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation for explaining only the invention, are not made
For limitation of the invention.
Embodiment 1
As shown in Fig. 2, the present invention is used for the heat dissipation of lithium battery device of electric car, including cooling fin 1;The cooling fin 1
Including rib 11, radiating ribs 12 and radiation tooth 13;The radiating ribs 12 are arranged on rib 11;The shape of the radiating ribs 12 is
Triangle, and an angle of the triangle is met to radiating airflow direction, the opposite side at the angle deviates from radiating airflow direction;It is described to dissipate
Hot tooth 13 is arranged in radiating ribs 12;The shape of the radiation tooth 13 is triangle, and an angle of the triangle is met to scattered
The opposite side in thermal current direction, the angle deviates from radiating airflow direction.
When the present embodiment is implemented, the shape of radiating ribs 12 is triangle, and an angle of the triangle is met to radiating airflow
The opposite side in direction, the angle deviates from radiating airflow direction, and radiating airflow first flows through the one of the triangle when flowing through radiating ribs 12
A angle then passes around radiating ribs 12 and generates vortex at the opposite side at the angle, since the fluid at vortex is around a vortex core
Rotation, according to fluid momentum law of conservation, the fluid flow rate at this is greatly improved, and inventor is according to simulation softward
Fluent.ansys carries out CFD simulation discovery, and the fluid Reynolds number at this is 10~30 times of radiating airflow Reynolds number, so side
The thickness of interlayer is reduced to 10%~3%, and heat dissipation effect substantially enhances.Meanwhile the shape of radiation tooth 13 be triangle, and this three
An angular angle is met to radiating airflow direction, and the opposite side at the angle deviates from radiating airflow direction, and radiating airflow is flowing through radiation tooth
When 13, an angle of the triangle is first flowed through, then pass around radiation tooth 13 and generates vortex at the opposite side at the angle, due to rotation
Fluid at whirlpool is rotated around a vortex core, and with radiating ribs 12, the fluid Reynolds number at this is the 10 of radiating airflow Reynolds number
~30 times, so the thickness in boundary layer is reduced to 10%~3%, heat dissipation effect substantially enhances.
Embodiment 2
As shown in Figure 1, the present embodiment is on the basis of embodiment 1, the quantity of the radiating ribs 12 is two or more;Institute
The size for stating radiating ribs 12 is sequentially increased along radiating airflow direction.
When the present embodiment is implemented, the size of two or more radiating ribs 12 is sequentially increased along radiating airflow direction, heat transmission gas
After stream flows through cooling fin 12 and radiated, temperature can be improved, and when flowing through next cooling fin 12, heat dissipation effect can be reduced.
Then inventor has found by creative work, and the size of radiating ribs 12 is sequentially increased along radiating airflow direction, can be made
When flowing through next cooling fin 12 after by the heating of previous cooling fin 12, heat dissipation area increases radiating airflow, while the heat dissipation
Rib 12 increases the disturbance of radiating airflow, so that the vortex Reynolds number generated at the cooling fin 12 increases, improves heat dissipation effect.
The present invention realizes the equal of cooling fin 12 by the way that the size of two or more radiating ribs 12 to be sequentially increased along radiating airflow direction
Even heat dissipation improves radiating efficiency and the safety of lithium battery.
Embodiment 3
As shown in Figure 1, the present embodiment on the basis of embodiment 1, further includes lithium battery 5, heat conducting pipe 2 and heat dissipation tank 6;Institute
Cooling fin 1 is stated to be arranged by heat conducting pipe 2 in 5 side of lithium battery;The lithium battery 5, heat conducting pipe 2 and the setting of cooling fin 1 are being radiated
Inside case 6.It further include air intake blower fan 4 and the first wind scooper 3;The outlet air end of the air intake blower fan 4 is by the first wind scooper 3 and dissipates
It is connected to inside hot tank 6;The geomery of first wind scooper 3 towards one end of 4 outlet air end of air intake blower fan goes out with air intake blower fan 4
The geomery at wind end matches;The geomery and 6 direction of heat dissipation tank of the one end of first wind scooper 3 towards heat dissipation tank 6
The geomery of the opening of first wind scooper 3 matches;The size of the heat dissipation tank 6 towards the opening of the first wind scooper 3 is greater than
The size of 4 outlet air end of air intake blower fan.
When the present embodiment is implemented, air intake blower fan 4 inside the first wind scooper 3 and heat dissipation tank 6 by being connected to, the first wind scooper 3
The radiating airflow that air intake blower fan 4 is blown out uniformly is diffused in heat dissipation tank 6, so that the heat dissipation of lithium battery is more uniform, safety
Property improve.
Embodiment 4
As shown in Figure 1, the present embodiment on the basis of embodiment 3, further includes air-out blower fan 8 and the second wind scooper 7;It is described
The air intake of air-out blower fan 8 inside the second wind scooper 7 and heat dissipation tank 6 by being connected to;Second wind scooper 7 is towards air-out blower fan
The geomery of one end of 8 air intakes and the geomery of 8 air intake of air-out blower fan match;Second wind scooper, 7 direction
The geomery of one end of heat dissipation tank 6 and the geomery of heat dissipation tank 6 towards the opening of the second wind scooper 7 match;It is described to dissipate
The size of hot tank 6 towards the opening of the second wind scooper 7 is greater than the size of 8 air intake of air-out blower fan.
When the present embodiment is implemented, air-out blower fan 8 passes through to be connected to inside the second wind scooper 7 and heat dissipation tank 6, the first wind scooper 3,
Heat dissipation tank 6 and the second wind scooper 7 form complete heat dissipation wind channel, so that the flowing of radiating airflow is more uniform, so that
The heat dissipation of lithium battery is more uniform, and the safety is improved.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.