LU600166B1 - A battery heat dissipation structure based on phase change heat transfer medium - Google Patents
A battery heat dissipation structure based on phase change heat transfer mediumInfo
- Publication number
- LU600166B1 LU600166B1 LU600166A LU600166A LU600166B1 LU 600166 B1 LU600166 B1 LU 600166B1 LU 600166 A LU600166 A LU 600166A LU 600166 A LU600166 A LU 600166A LU 600166 B1 LU600166 B1 LU 600166B1
- Authority
- LU
- Luxembourg
- Prior art keywords
- battery
- phase change
- transfer medium
- heat dissipation
- electrode material
- Prior art date
Links
Classifications
-
- 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
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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
- H01M10/651—Means for temperature control structurally associated with the cells characterised by parameters specified by a numeric value or mathematical formula, e.g. ratios, sizes or concentrations
- H01M10/652—Means for temperature control structurally associated with the cells characterised by parameters specified by a numeric value or mathematical formula, e.g. ratios, sizes or concentrations characterised by gradients
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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
- H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Pure & Applied Mathematics (AREA)
- Physics & Mathematics (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- General Physics & Mathematics (AREA)
- Algebra (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a battery heat dissipation structure based on a phase change heat transfer medium, relates to the technical field of battery heat dissipation, comprises a battery pack, a cover plate is arranged on the top of the battery pack, a plurality of cylindrical power battery bodies are evenly arranged in the battery pack, the cylindrical power battery body comprises a negative electrode material layer and a positive electrode material layer, a second ceramic diaphragm is arranged between the negative electrode material layer and the positive electrode material layer, a first ceramic diaphragm is arranged around the periphery of the positive electrode material layer, a phase change heat transfer medium layer is arranged around the periphery of the first ceramic diaphragm, an exoskeleton structure is arranged between the plurality of cylindrical power battery bodies inside the battery pack.
Description
DESCRIPTION 600766
A BATTERY HEAT DISSIPATION STRUCTURE BASED ON PHASE CHANGE
HEAT TRANSFER MEDIUM
The present invention relates to the technical field of battery heat dissipation, and in particular to a battery heat dissipation structure based on a phase-change heat transfer medium.
New energy vehicles have the dual advantages of low energy consumption and zero emissions. Focusing on the development of electric vehicles can not only reduce the excessive consumption of non-renewable energy and effectively curb the pollution caused by fuel vehicle emissions, but is also an effective means in the era of carbon neutrality. The key to new energy vehicle technology lies in improving the performance of power batteries. The power batteries currently used in electric vehicles are divided into two categories: fuel cells and lithium-ion batteries. Fuel cells are limited by energy consumption for hydrogen production, storage and transportation, and their development is relatively slow. Lithium-ion batteries have become the main force in new energy vehicles due to their advantages such as long charge and discharge cycle life, low self-discharge rate and fast charging technology.
However, the impact of temperature on the working state of lithium-ion batteries is particularly significant. When the temperature is too high or too low, it will affect its performance changes, cycle life and even safety.Developing an efficient power battery thermal management system can ensure that the battery operates within the optimal operating temperature range. This has important practical application value in improving battery performance, extending service life, ensuring the safety of electric vehicles, improving the overall performance of electric vehicles, and promoting the development of electric vehicles.
However, due to factors such as the need for new energy batteries to be heated under cold conditions and the large amount of heat generated instantly during large 0600166 current discharge, the thermal management system using air and liquid as media performs poorly and has poor heat dissipation effect, Making it difficult for the heat inside the battery to dissipate, resulting in uneven battery temperature distribution, affecting battery health, causing battery loss, affecting battery use and battery life, and in severe cases leading to dangers such as battery short circuit and self- explosion, posing a major safety hazard to users.
The purpose of the present invention is to provide a battery heat dissipation structure based on phase change heat transfer medium to solve the problem that the heat dissipation effect of the existing battery heat dissipation structure is poor, making it difficult for the heat inside the battery to dissipate, resulting in uneven battery temperature distribution, affecting battery health and causing battery loss.
A battery heat dissipation structure based on phase change heat transfer medium, comprising a battery pack, wherein two cover plates are provided on the top of the battery pack, a plurality of cylindrical power battery bodies are evenly arranged in the battery pack, the cylindrical power battery bodies comprise a negative electrode material layer and a positive electrode material layer, a second ceramic diaphragm is provided between the negative electrode material layer and the positive electrode material layer, a first ceramic diaphragm is provided around the positive electrode material layer, a phase change heat transfer medium layer is provided around the first ceramic diaphragm, and an exoskeleton structure is provided between the plurality of cylindrical power battery bodies inside the battery pack.
Preferably, the exoskeleton structure is a shaped functional gradient composite material with high thermal conductivity.
Preferably, the composite material is specifically expanded graphite with an anisotropic porous structure.
Preferably, a heat spreader is provided at the bottom of the battery pack, and a plurality of heat dissipation fins are provided at the end of the heat spreader. 0600166
The advantages of the present invention are as follows: a battery heat dissipation structure based on a phase change heat transfer medium in the present invention absorbs the heat of a cylindrical power battery body by setting a phase change heat transfer medium layer and expanded graphite with a porous structure, dissipates the heat of the cylindrical power battery body, facilitates the rapid dissipation of heat inside the cylindrical power battery body, enhances the heat dissipation effect of the structure, avoids uneven temperature distribution of the cylindrical power battery body, affects battery health, causes battery loss, prolongs the service life of the cylindrical power battery body, reduces safety hazards in use, and simultaneously sets a heat spreader and heat dissipation fins, facilitates cold air heat dissipation of the battery pack, thereby improving the heat exchange efficiency of the battery pack.
Figure 1 is a schematic diagram of the three-dimensional structure of the present invention.
Figure 2 is a schematic diagram of the structure of the present invention without the cover plate installed.
Figure 3 is a schematic diagram of the structure of the cylindrical power battery body of the present invention.
Figure 4 is a technical roadmap of the inversion model of the present invention.
Figure 5 is a temperature change diagram of the non-stable state under different thermal diffusivity conditions of the present invention.
Among them, 100, battery pack; 101, cover plate; 102, heat sink; 103, cooling fins; 104, exoskeleton structure; 200, cylindrical power battery body; 201, phase change heat transfer medium layer; 202, first ceramic diaphragm; 203, positive electrode material layer; 204, second ceramic diaphragm; 205, negative electrode material layer.
DETAILED DESCRIPTION OF THE INVENTION 600766
In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific Implementation methods.
As shown in Figures 1 to 5, a battery heat dissipation structure based on a phase change heat transfer medium includes a battery pack 100, a cover plate 101 is provided on the top of the battery pack 100, a plurality of cylindrical power battery bodies 200 are evenly arranged in the battery pack 100, the cylindrical power battery bodies 200 include a negative electrode material layer 205 and a positive electrode material layer 203, a second ceramic diaphragm 204 is provided between the negative electrode material layer 205 and the positive electrode material layer 203, a first ceramic diaphragm 202 is provided on the periphery of the positive electrode material layer 203, a phase change heat transfer medium layer 201 is provided on the periphery of the first ceramic diaphragm 202, and an exoskeleton structure 104 is provided between the plurality of cylindrical power battery bodies 200 inside the battery pack 100.
The temperature of the phase change heat transfer medium layer 201 remains constant during the phase change process. By utilizing its characteristics to absorb or release a large amount of latent heat, there is no need to consume additional battery energy, and the energy saving effect is more obvious.lt is beneficial to dissipate heat for the cylindrical power battery body 200.The heat inside the cylindrical power battery body 200 is easily dissipated, thereby avoiding uneven temperature distribution of the cylindrical power battery body 200, affecting battery health, causing battery loss, extending the service life of the cylindrical power battery body 200, and reducing safety hazards in use.
In this embodiment, the outer skeleton structure 104 is a shaped functional gradient composite material with high thermal conductivity, and the composite material is specifically expanded graphite with an anisotropic porous structure.
The porous expanded graphite is used to fill the phase change heat transfer medium layer 201 with good bonding, and the gaps can absorb the melted phase change heat transfer medium layer 201 without overflowing and precipitating, and 0600166 the overall structure can also remain stable, thereby enhancing the heat dissipation effect of the structure.
In this embodiment, a heat spreader 102 is provided at the bottom of the battery pack 100 through thermal conductive silicone grease, and a plurality of heat dissipation fins 103 are provided at the end of the heat spreader 102 .
The battery pack 100 transfers excess heat to the heat spreader 102 through thermal grease, and then the heat spreader 102 transfers the heat to the cooling fins 103. The flow channel of the cooling fins 103 is arranged opposite the air duct, which is convenient for cold air heat dissipation of the battery pack 100, thereby improving the heat exchange efficiency of the battery pack 100.
In this embodiment, the anisotropic material includes orthogonal anisotropy of a layered structure and an annular cylindrical structure, a porous filling structure, a particle mixed structure, and a composite mixed structure, etc., and the heat dissipation effects thereof are different. The equivalent parameters are obtained by measuring the temperature and performing analytical inversion. Taking functional gradient composite materials as the research object, a multi-dimensional physical model is used to simultaneously measure the thermal properties of the materials, quickly measure the thermal diffusivity in the non-steady state, and measure the thermal conductivity in the steady state. Combining the test data with the analytical results and performing inversion, it is found that the structure of the anisotropic material with better thermal conductivity is a porous structure.Using expanded graphite with anisotropic porous structure as the outer skeleton can achieve better heat dissipation effect.
Working process and principle: When the device is in use, the phase change heat transfer medium layer 201 absorbs the heat of the cylindrical power battery body 200, which is beneficial to the heat dissipation of the cylindrical power battery body 200, so that the heat inside the cylindrical power battery body 200 is easy to dissipate. The porous expanded graphite is used to fill the phase change heat transfer medium layer 201 with good bonding, and the gaps can absorb the melted phase change heat transfer medium layer 201 without overflowing and 0600166 precipitating. The overall structure can also remain stable, enhance the heat dissipation effect of the structure, avoid uneven temperature distribution of the cylindrical power battery body 200, affect battery health, cause battery loss, extend the service life of the cylindrical power battery body 200, and reduce safety hazards in use.At the same time, the excess heat in the battery pack 100 is transferred to the heat spreader 102 through the thermal conductive silicone grease, and then the heat spreader 102 transfers the heat to the heat dissipation fins 103. The flow channel of the heat dissipation fins 103 is arranged directly opposite the air duct, which is convenient for cold air heat dissipation of the battery pack 100, thereby improving the heat exchange efficiency of the battery pack 100.
It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.
Claims (4)
1. A battery heat dissipation structure based on phase change heat transfer medium, characterized in that: it includes a battery pack, a cover plate is provided on the top of the battery pack, a plurality of cylindrical power battery bodies are evenly arranged in the battery pack, the cylindrical power battery bodies include a negative electrode material layer and a positive electrode material layer, a second ceramic diaphragm is provided between the negative electrode material layer and the positive electrode material layer, a first ceramic diaphragm is provided on the periphery of the positive electrode material layer, a phase change heat transfer medium layer is provided on the periphery of the first ceramic diaphragm, and an exoskeleton structure is provided between the plurality of cylindrical power battery bodies inside the battery pack.
2. A battery heat dissipation structure based on phase change heat transfer medium according to claim 1, characterized in that: the outer skeleton structure is a shaped functional gradient composite material with high thermal conductivity.
3. A battery heat dissipation structure based on phase change heat transfer medium according to claim 2, characterized in that: the composite material is specifically expanded graphite with an anisotropic porous structure.
4. A battery heat dissipation structure based on phase change heat transfer medium according to claim 1, characterized in that: a heat spreader is provided at the bottom of the battery pack, and a plurality of heat dissipation fins are provided at the end of the heat spreader.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU600166A LU600166B1 (en) | 2025-02-07 | 2025-02-07 | A battery heat dissipation structure based on phase change heat transfer medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU600166A LU600166B1 (en) | 2025-02-07 | 2025-02-07 | A battery heat dissipation structure based on phase change heat transfer medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| LU600166B1 true LU600166B1 (en) | 2025-08-11 |
Family
ID=96702770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| LU600166A LU600166B1 (en) | 2025-02-07 | 2025-02-07 | A battery heat dissipation structure based on phase change heat transfer medium |
Country Status (1)
| Country | Link |
|---|---|
| LU (1) | LU600166B1 (en) |
-
2025
- 2025-02-07 LU LU600166A patent/LU600166B1/en active IP Right Grant
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG | Patent granted |
Effective date: 20250811 |