CN112038727B - Air cooling cylinder power battery package that contains bionical surface microstructure heat dissipation piece - Google Patents
Air cooling cylinder power battery package that contains bionical surface microstructure heat dissipation piece Download PDFInfo
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- CN112038727B CN112038727B CN202010842880.2A CN202010842880A CN112038727B CN 112038727 B CN112038727 B CN 112038727B CN 202010842880 A CN202010842880 A CN 202010842880A CN 112038727 B CN112038727 B CN 112038727B
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- heat dissipation
- surface microstructure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses an air-cooled cylindrical power battery pack containing a bionic surface microstructure heat dissipation member, and belongs to the technical field of power battery heat management. The battery pack mainly comprises a fan, a shell, an insulating fixing frame, a bionic surface microstructure heat dissipation piece and a cylindrical power battery. The outer side of the curved surface of the bionic surface microstructure heat dissipation part is in contact with the surface of the battery, and the inner side of the curved surface is provided with the bionic surface microstructure. The cylindrical power battery is axially arranged, and when the fan drives cooling airflow to enter the battery pack, the bionic surface microstructure heat dissipation piece can improve the heat exchange efficiency between the cooling airflow and the battery. The insulating fixed mount is installed between every row of battery, plays support and insulating effect. On the basis of the traditional axial air cooling, the bionic surface microstructure heat dissipation part is added, the size and the structure of the battery pack are not changed, and the bionic surface microstructure heat dissipation device has the advantages of convenience in installation, simple structure, enhanced heat dissipation effect and the like.
Description
Technical Field
The invention relates to the technical field of power battery thermal management, in particular to an air-cooled cylindrical power battery pack containing a bionic surface microstructure heat dissipation member.
Background
Lithium ion batteries are widely used in various power equipment because of their high efficiency, cleanliness, and high capacity. Each country continuously provides a new energy automobile to replace the traditional fuel oil automobile, and the lithium ion battery gradually becomes a focus of new energy market. At present, the development direction of the power battery is a high-capacity layered nickel-cobalt-manganese ternary material, however, the problem of thermal stability of the battery is more prominent along with the improvement of the energy storage density of the battery. Too high or too low temperature and uneven temperature distribution among batteries directly affect the service life and performance of the power battery and cause safety problems of the battery system.
The thermal management of the power battery aims to timely process the heat of the battery and control the temperature of the battery within a safe range. The existing heat management method mainly comprises air cooling, liquid cooling and phase change material cold storage, wherein an air cooling system is a cooling system which blows cooling air into a battery pack by using a fan and radiates heat of the battery pack to the external environment through the cooling air by forced convection. Due to the simplicity and reliability of the air cooling system, the air cooling system is widely applied to the thermal management system of the battery pack of the electric automobile. However, the heat exchange performance of heat dissipation by air convection is poor, and the cooling efficiency of the air cooling system is generally low, so that the development and application of the air cooling system are restricted. The bionic surface microstructure with reasonable size is proved to be an effective structure for increasing the heat exchange efficiency. According to the invention, a novel bionic surface microstructure heat dissipation part is added in the traditional axial air-cooled battery pack, so that the temperature rise of the power battery module can be effectively reduced and the thermal stability of the module can be enhanced without changing the original structure size and the thermal management system of the battery pack.
Disclosure of Invention
The invention aims to provide an air-cooled cylindrical power battery pack containing a bionic surface microstructure heat dissipation part, which has the advantages of simple structure, convenience in installation, good heat dissipation effect and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an air cooling cylinder power battery package that contains bionical surface microstructure radiating element, includes the fan, the shell, insulating mount, bionical surface microstructure radiating element, cylinder power battery, as shown in figure 1. The cylindrical power batteries are arranged at equal intervals and are axially arranged. And the outside air is driven by the fan, enters the battery module, passes through the plurality of layers of cylindrical power batteries and then flows out from the other end of the battery pack.
The bionic surface microstructure heat dissipation piece is provided with an arc surface and a right-angle surface, the diameter of the arc surface is the same as that of the cylindrical power battery, the outer side of the arc surface is in contact with the surface of the battery, and the heat conduction glue is used in the middle of the arc surface to remove gap air and increase the heat conductivity, as shown in figure 2. The four bionic surface microstructure radiating pieces are contacted through the right-angle surfaces, as shown in fig. 3, and are embedded into gaps among the cylindrical power batteries after being combined, so that the space of a battery pack is not increased, and the radiating efficiency of air cooling is enhanced, as shown in fig. 6. The thickness of the arc surface is 0.1mm, a supporting surface is provided for the bionic surface microstructure, the thickness of the right-angle surface is 0.1-0.5mm, and the strength of the battery pack is improved while the heat dissipation efficiency is enhanced.
The bionic surface microstructure is arranged on the inner side of the curved surface of the bionic surface microstructure heat dissipation part, so that the heat dissipation area can be increased, and the heat exchange efficiency between cooling airflow and the battery can be improved. The section of the bionic surface microstructure is rectangular or triangular or trapezoidal or elliptical, the height h is 0.4-1.4mm, and the interval s of the bionic surface microstructure is twice of the height h, as shown in fig. 4. After the three layers of bionic surface microstructure heat dissipation pieces are combined and installed in a battery pack, the overall axial length L of the bionic surface microstructure heat dissipation pieces is 41-201mm, as shown in figure 5.
In order to avoid short circuit between the battery pack modules, the insulating fixing frame is arranged between the cylindrical power batteries on each layer, and plays roles of insulation and fixation. The shell provides a fixed position for the fan and the insulating fixing frame.
The battery module is a three-row 18650 type cylindrical lithium ion battery, and is arranged in parallel at an equal distance of 22 mm.
Has the advantages that:
1. the bionic surface microstructure heat dissipation piece can flexibly change the size according to the size and the interval of the battery, and after the bionic surface microstructure heat dissipation piece is embedded into a battery module, the original structure size of the battery pack and the original structure size of a heat management system are not changed.
2. The bionic surface microstructure is applied to air cooling and heat dissipation of the battery, so that the heat exchange and heat dissipation efficiency between the battery and cooling air flow is enhanced, the temperature rise of the battery of the power battery module is reduced, the thermal stability of the module is enhanced, and the energy consumption of thermal management is saved.
Drawings
Fig. 1 is a schematic diagram of an air-cooled battery pack according to the present invention;
fig. 2 is a partial plan view and a sectional view of a battery module according to the present invention;
FIG. 3 is a structural diagram of a heat sink with a bionic surface microstructure according to the present invention;
FIG. 4 is a schematic diagram of the cross-sectional shapes of different bionic surface microstructures in the invention, (a) a triangle, (b) a trapezoid, (c) an ellipse, and (d) a rectangle;
FIG. 5 is a schematic diagram showing the change in the overall length of the microstructure according to the present invention;
FIG. 6 shows the thickness variation of the right-angle surface of the highest temperature and temperature difference of the battery module according to the present invention;
FIG. 7 shows the variation of the maximum temperature and temperature difference of the battery module according to the height and shape of the cross section of the bionic surface microstructure;
FIG. 8 shows the variation of the maximum temperature and temperature difference of the battery module according to the overall length of the bionic surface microstructure;
fig. 9 shows the variation of the maximum temperature and temperature difference with the air cooling power in different embodiments of the battery module according to the present invention;
in the figure: the fan is characterized in that the fan is 1, the fan is 2, the shell is 3, the insulating fixing frame is 3, the bionic surface microstructure radiating piece is 4, the 18650 type cylindrical lithium ion battery is 5, the bionic surface microstructure is 6, the arc surface is 7, and the right-angle surface is 8.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
the present invention will be further described with reference to the following examples, but the present invention is not limited to the description of the examples.
Example 1
The utility model provides an air cooling cylinder power battery package that contains bionical surface microstructure radiating piece, includes fan 1, shell 2, insulating mount 3, bionical surface microstructure radiating piece 4, cylinder power battery 5. The outside air is driven by the fan 1, enters the battery module, passes through the plurality of layers of cylindrical power batteries 5 and then flows out of the other end of the battery pack. The bionic surface microstructure heat dissipation piece 4 is provided with an arc surface 7 and a right-angle surface 8, the diameter of the arc surface 7 is the same as that of the cylindrical power battery 5, the outer side of the arc surface 7 is in surface contact with the cylindrical power battery 5, and gap air is removed by heat conduction glue in the middle, so that the heat conductivity is increased. The four bionic surface microstructure radiating pieces 4 are contacted through the right-angle surfaces 8, and are embedded into the space between the cylindrical power batteries 5 after combination, so that the air cooling radiating efficiency is enhanced while the air of the battery pack is not increased.
In order to avoid short circuit between the battery packs, the insulating fixing frame 3 is arranged between each layer of cylindrical power batteries 5 and plays the role of insulation and fixation. The housing 2 provides a fixed position for the fan 1 and the insulating holder 3.
The thickness of the arc surface 7 is 0.1mm, a supporting surface is provided for the bionic surface microstructure 6, the thickness of the right-angle surface 8 is 0.1-0.5mm, and the strength of the battery pack is improved while the heat dissipation efficiency is enhanced. When the inlet wind speed of the wind speed is 0.8m/s, and the cross-sectional shape, the height and the overall length of the bionic surface microstructure 6 are respectively triangular, 1.0mm and 201mm, the maximum temperature and the maximum temperature difference of the battery module are gradually reduced along with the increase of the thickness, as shown in fig. 6. After the thickness of the right-angled surface 8 is increased from 0.1mm to 0.5mm, the maximum temperature and the maximum temperature difference are reduced by 0.6K and 0.8K, respectively.
Example 2
The invention has the effect of heat dissipation of the cylindrical power battery pack, and the 18650 type cylindrical battery 5 in the invention can also be a cylindrical battery such as 26650, 26650, 32650 and the like. Meanwhile, the invention is also applicable when the distribution spacing and arrangement mode of the batteries are changed.
Example 3
The section of the bionic surface microstructure 6 can be rectangular, triangular, trapezoidal or elliptical, the height of the bionic surface microstructure 6 is 0.4-1.4mm, and the interval s of the bionic surface microstructure 6 is twice of the height h. The three layers of bionic surface microstructure heat dissipation parts 4 are axially combined, and after the bionic surface microstructure heat dissipation parts are installed in a battery pack, the overall axial length L of the bionic surface microstructure heat dissipation parts is 41-201 mm. According to the service condition of the battery module, when the inlet wind speed of the wind speed is 0.8m/s, the section shape, the height and the whole length of the bionic surface microstructure 6 can be correspondingly changed.
When the cross-sectional shape and the whole length of the bionic surface microstructure 6 are respectively triangular and 201mm, the highest temperature and the maximum temperature difference of the battery module are gradually reduced along with the increase of the height of the microstructure. The maximum temperature and temperature difference decreased by 0.52K and 0.25K, respectively, as the microstructure height increased from 0.4mm to 1.4 mm. When the height and the overall length of the bionic surface microstructure 6 are respectively 1mm and 201mm, the cross section is triangular in different shapes, and the maximum temperature and the temperature difference which can be minimum are respectively 306.52K and 4.81K, as shown in FIG. 7.
When the cross-sectional shape and the height of the bionic surface microstructure 6 are respectively triangular and 1.0mm, the maximum temperature and the maximum temperature difference of the battery module are firstly reduced and then increased along with the increase of the whole length, and when the length is 81mm, the maximum temperature and the maximum temperature difference are respectively 306.52K and 4.58K, which are respectively the minimum, as shown in FIG. 8.
Example 4
In order to save energy and improve the heat dissipation efficiency of air cooling, when the inlet wind speed of wind speed is 0.8m/s, the structural parameters of the bionic surface microstructure heat dissipation piece 4 are optimized by using an orthogonal test, the thickness of a right-angle surface 8 of the optimized bionic surface microstructure heat dissipation piece is 0.4mm, the cross section of the bionic surface microstructure 6 is trapezoidal, the height of the bionic surface microstructure is 0.8mm, and the length of the bionic surface microstructure is 61 mm. Compared with the traditional air-cooled battery pack without the heat dissipation part with the bionic surface microstructure, the cooling efficiency is obviously increased after the heat dissipation part with the bionic surface microstructure 4 is added under the same power condition; meanwhile, compared with the original scheme, the scheme after orthogonal optimization has the advantages that the maximum temperature and the temperature difference are uniformly and obviously reduced under the same power, as shown in fig. 9.
Claims (2)
1. An air-cooled cylindrical power battery pack containing a bionic surface microstructure heat dissipation part comprises a battery module, a fan and a shell, wherein the battery module is formed by a plurality of cylindrical power batteries which are arranged at equal intervals and arranged axially;
the bionic surface microstructure heat dissipation piece is provided with an arc surface and a right-angle surface, and the inner side surface of the arc surface is provided with a bionic surface microstructure; the diameter of the arc surface is the same as that of the cylindrical power battery, and the arc surface is attached to the surface of the cylindrical power battery; right-angle surfaces between adjacent bionic surface microstructure heat dissipation pieces are attached;
the thickness of the arc surface is 0.1mm, and the thickness of the right-angle surface is 0.1-0.5 mm;
the cross section of the bionic surface microstructure is rectangular or triangular or trapezoidal or elliptical, the height is 0.4-1.4mm, and the interval between adjacent bionic surface microstructures is twice of the height;
the overall axial length of each layer of the bionic surface microstructure is 41-201 mm.
2. The air-cooled cylindrical power battery pack with the bionic surface microstructure heat dissipation member as recited in claim 1, wherein a heat conducting glue is arranged between the outer side of the arc surface and a contact surface of the cylindrical power battery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010842880.2A CN112038727B (en) | 2020-08-20 | 2020-08-20 | Air cooling cylinder power battery package that contains bionical surface microstructure heat dissipation piece |
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| CN202010842880.2A CN112038727B (en) | 2020-08-20 | 2020-08-20 | Air cooling cylinder power battery package that contains bionical surface microstructure heat dissipation piece |
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| CN112038727B true CN112038727B (en) | 2022-04-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN216720070U (en) * | 2022-01-12 | 2022-06-10 | 宁德时代新能源科技股份有限公司 | Battery and electric equipment |
| KR20230110678A (en) * | 2022-01-12 | 2023-07-25 | 컨템포러리 엠퍼렉스 테크놀로지 씨오., 리미티드 | batteries and electrical appliances |
| JP2024509012A (en) * | 2022-01-12 | 2024-02-29 | 寧徳時代新能源科技股▲分▼有限公司 | Batteries and electrical equipment |
| CN116995339A (en) * | 2023-09-28 | 2023-11-03 | 深圳市德兰明海新能源股份有限公司 | Liquid cooling device and energy storage equipment |
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