CN114944518A - Phase-change liquid cooling coupling heat management device for power battery pack - Google Patents
Phase-change liquid cooling coupling heat management device for power battery pack Download PDFInfo
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- CN114944518A CN114944518A CN202111478711.6A CN202111478711A CN114944518A CN 114944518 A CN114944518 A CN 114944518A CN 202111478711 A CN202111478711 A CN 202111478711A CN 114944518 A CN114944518 A CN 114944518A
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- heat dissipation
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- sheet structure
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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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6552—Closed pipes transferring heat by thermal conductivity or phase transition, e.g. heat pipes
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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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- 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 belongs to the field of new energy automobiles, and discloses a phase change liquid cooling coupling heat management device for a power battery pack. The device comprises a battery module, a heat dissipation pipeline, a positioning plate and a fastener; the heat dissipation pipeline is internally provided with a three-period extremely-small curved surface sheet structure which is integrally formed with the outer wall of the pipeline; the three-period minimum curved surface sheet structure in the heat dissipation pipeline divides the space in the heat dissipation pipeline into an inner area and an outer area which are not communicated with each other, the outer area is a phase-change material filling channel, and the inner area is a fluid channel. According to the invention, the three-period extremely-small-curved-surface sheet structure is used for coupling the phase-change heat dissipation mode with the liquid-cooling heat dissipation mode, the heat saturation of the phase-change material is eliminated by using the liquid-cooling heat dissipation mode, the temperature gradient of the liquid-cooling heat dissipation mode is reduced by using the phase-change heat dissipation mode, the temperature difference of the battery pack is effectively controlled within a reasonable range while the temperature of the battery pack is reduced, and the temperature consistency of the battery pack is improved.
Description
Technical Field
The invention relates to the field of new energy automobiles, in particular to a phase change liquid cooling coupling heat management device for a power battery pack.
Background
The power battery is one of the core modules of the electric automobile, and the performance of the power battery has a great influence on the performance of the electric automobile. The operation condition of the electric automobile is complex, the lithium ion battery can generate a large amount of heat along with the high-rate discharge in the use process, the cycle life of the lithium ion battery can be influenced by high temperature, and the lithium ion battery can be caused to be out of control due to heat in serious conditions, so that combustion or explosion is caused. Therefore, there is a need for an effective thermal management system for lithium ion battery packs that controls the temperature and temperature differential of the power battery pack within a reasonable range.
The heat dissipation mode of the power battery which is applied more at present comprises the following steps: liquid cooling, phase change material cooling and the like. With the continuous improvement of the driving range and the power performance of the electric automobile, the scale of the power battery module is gradually increased, and the heat production quantity of the power battery pack is sharply increased, which puts forward higher requirements for a battery thermal management system. The great specific heat capacity of coolant liquid can absorb fast and take away the heat that power battery during operation produced for the battery module dispels the heat fast under high temperature, and the liquid cooling mode has obtained extensive application in power battery heat dissipation field. However, due to the heating of the battery module, the temperature of the cooling fluid gradually rises in the flowing direction, and a temperature gradient problem occurs, so that the temperature difference inside the power battery pack is large, and the performance and the service life of the power battery are seriously influenced. The latent heat storage heat when phase change material takes place the phase transition is utilized to the phase transition cooling mode, melts to liquid back completely at phase transition material, utilizes the mobility of phase transition material to equalize the temperature difference between each electric core in the power battery module, improves the temperature uniformity of power battery module. However, when the phase change material is completely melted, the phase change material is thermally saturated, and cannot store more heat, so that the temperature of the battery module is continuously increased, and thermal runaway is easily caused.
The three-period extremely-small curved surface is smooth and continuous in topological structure, the space of an outer wrapping cube of the three-period extremely-small curved surface can be divided into two areas which are not communicated with each other, the size and the shape can be easily controlled by controlling the implicit function expression parameters of the three-period extremely-small curved surface, and the three-period extremely-small curved surface sheet body structure which can be used for processing can be obtained by closing the two three-period extremely-small curved surfaces. The development of three-cycle, extremely small curved surfaces has been greatly limited due to the difficulty of manufacturing, but with the rapid development of additive manufacturing technology, the manufacturing is no longer an insurmountable obstacle.
The technical problem to be solved by the invention is how to fully utilize the excellent characteristics of the three-period extremely-small curved-surface sheet structure and combine the liquid cooling mode and the phase-change material cooling mode of battery thermal management together, and the invention designs the phase-change liquid cooling coupling thermal management device of the power battery pack with compact structure and excellent performance.
Disclosure of Invention
According to the technical problem that the heat dissipation performance and the temperature consistency of the power battery module cannot be simultaneously met by a single liquid cooling mode or a phase-change material cooling mode due to the temperature gradient problem of the liquid cooling mode and the thermal saturation problem of the phase-change cooling mode, and the working efficiency and the cycle life of the power battery module are affected, the phase-change liquid cooling coupling heat management device for the power battery pack is provided.
The technical scheme adopted by the invention is as follows: a phase change liquid cooling coupling heat management device of a power battery pack comprises a battery module 1, a heat dissipation pipeline 2, a positioning plate 3 and a fastener 4; the battery module 1 mainly comprises a plurality of battery cells 11; the heat dissipation pipeline 2 is in a snake shape and integrally formed by parallel pipeline sections and connecting sections; mounting bosses 25 are arranged on two sides of the parallel pipeline section, and semi-cylindrical grooves are uniformly distributed on the side surfaces of the mounting bosses 25 and are used for being tightly matched with the outer wall of the battery cell 11; the grooves are symmetrically arranged, and two rows of grooves between two adjacent parallel pipeline sections are staggered; the end part of the parallel pipeline section is provided with a fixed through hole a 24; the positioning plate 3 is respectively positioned on the upper surface and the lower surface of the heat dissipation pipeline 2, is provided with a battery cell mounting hole site 32 for fixing the battery cell 11, and is provided with a fixing through hole b31 corresponding to the fixing through hole a 24; the fastener 4 fixes the heat dissipation pipeline 2 and the positioning plate 3 by using the fixing through hole; the three-period extremely-small curved surface sheet structure array 5 is integrally formed inside the heat dissipation pipeline 2, and the three-period extremely-small curved surface sheet structure array 5 divides the inside of the heat dissipation pipeline 2 into two areas which are not communicated with each other and are respectively an external area and an internal area; the outer area is a space between the three-period extremely-small curved-surface sheet structure array 5 and the heat dissipation pipeline 2, namely the phase-change material filling channel 61; the inner area is a fluid channel 62 formed by the three-period extremely-small curved sheet structure array 5; one end of the heat dissipation pipeline 2 is provided with a liquid inlet 22 of the fluid channel 62, and the other end is provided with a liquid outlet 23 of the fluid channel 62; the top of the heat dissipation pipe 2 is also provided with a phase change material injection port 21.
The three-period extremely-small curved-surface sheet structure array 5 is formed by arranging three-period extremely-small curved-surface sheet structure unit cells 6.
The three-period minimum curved surface is a P curved surface, and the implicit function mathematical expression of the three-period minimum curved surface is as follows:
p curved surface:
in the formula, x, y and z are coordinates of each curved surface point under a Cartesian coordinate system, l is the side length of a cube wrapped outside a three-cycle minimum curved surface, and C is a constant and has a value range of-1 to 1.
The three-period extremely-small-curved-surface sheet structure unit cell 6 is formed by closing two P curved surfaces with C different from 0, wherein the absolute values of C values in the expressions of the two P curved surfaces are equal.
Heat-conducting silicone grease is coated in the groove on the side surface of the heat dissipation pipeline 2; along heat dissipation pipeline 2 length direction, two adjacent parallel heat dissipation pipeline 2 stagger the interval, and two heat dissipation pipeline 2 positions of being apart from are the same.
The three-period extremely-small curved-surface sheet structure is arranged in the heat dissipation pipeline 2, so that the space in the heat dissipation pipeline 2 is divided into an inner area and an outer area which are not communicated with each other, the three-period extremely-small curved-surface sheet structure is a smooth and continuous curved-surface structure and a large specific surface area, efficient heat exchange is provided, and meanwhile, the pressure drop of cooling liquid in a fluid channel is reduced. The advantages of liquid cooling and phase-change material cooling are combined, the temperature gradient of liquid cooling is reduced by the phase-change material cooling mode, the thermal saturation phenomenon of the phase-change material cooling mode is eliminated by liquid cooling, the advantage complementation in performance is realized, the temperature difference of the power battery module is reduced while the heat dissipation performance of the heat management system is improved, and the temperature consistency of the power battery module is improved.
The invention has the beneficial effects that:
1) according to the phase change liquid cooling coupling heat management device for the power battery pack, the three-period extremely-small curved surface sheet structure is arranged in the heat dissipation pipeline, so that the space in the heat dissipation pipeline is divided into an inner area and an outer area which are not communicated with each other, the coupling of liquid cooling and phase change material cooling modes is realized, the three-period extremely-small curved surface sheet structure is periodic and can be expanded infinitely in three directions of a three-dimensional space, and meanwhile, the three-period extremely-small curved surface sheet structure has a smooth continuous curved surface structure and a larger specific surface area, so that the pressure drop of cooling liquid in a fluid channel is reduced while efficient heat exchange is provided.
2) According to the phase change liquid cooling coupling heat management device for the power battery pack, the liquid cooling heat dissipation mode and the phase change material mode are coupled, the advantages of liquid cooling and the advantages of phase change material cooling are combined, the temperature gradient of liquid cooling is reduced by the phase change material cooling mode, the thermal saturation phenomenon of the phase change material cooling mode is eliminated by liquid cooling, the advantage complementation is realized, the heat dissipation performance of the heat management system is improved, the temperature difference of the power battery module is reduced, and the performance and the cycle life of a power battery are improved.
The technical scheme of the invention solves the technical problems that the single liquid cooling mode or the phase-change material cooling mode cannot simultaneously meet the requirements of the heat dissipation performance and the temperature consistency of the power battery module and influence the working efficiency and the cycle life of the power battery module due to the fact that the liquid cooling mode and the phase-change material cooling mode have the temperature gradient problem and the thermal saturation problem.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an exploded schematic view of a phase-change liquid-cooling coupling thermal management device for a power battery pack according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a phase-change liquid-cooling coupling thermal management device for a power battery pack according to an embodiment of the present invention.
Fig. 3 is a top view of fig. 2.
Fig. 4 is a schematic structural diagram of a heat dissipation pipe according to an embodiment of the present invention.
Fig. 5 is a top view of fig. 4.
Fig. 6 is a left side view of fig. 4.
Fig. 7 is a schematic structural view of a three-cycle extremely-small curved-surface sheet structure disposed inside a heat dissipation duct according to an embodiment of the present invention.
Fig. 8(a) is a schematic view of a three-cycle phase-change material filling channel with a minimum curved-surface sheet structure disposed inside a heat dissipation duct according to an embodiment of the present invention.
Fig. 8(b) is a schematic structural view of a three-cycle extremely-small-curved-surface sheet structure unit disposed inside a heat dissipation duct according to an embodiment of the present invention.
Fig. 8(c) is a schematic view of a three-cycle fluid channel with a very small curved plate structure disposed inside a heat dissipation channel according to an embodiment of the present invention.
FIG. 9 is a schematic view of a positioning plate according to an embodiment of the present invention.
In the figure: 1. a battery module; 11. an electric core; 2. a heat dissipation pipe; 21. a phase change material injection port; 22. a liquid inlet; 23. a liquid outlet; 24. a fixing through hole a; 25. mounting a boss; 3. positioning a plate; 31. a fixing through hole b; 32. a battery cell mounting hole site; 4. a fastener; 5. three-period extremely-small curved-surface sheet structure array; 6. three-cycle minimum curved sheet structure unit cells; 61. filling the channel with the phase-change material; 62. a fluid channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 9, a phase-change liquid-cooling coupling thermal management device for a power battery pack comprises a battery module 1, a heat dissipation pipeline 2, a positioning plate 3 and a fastening piece 4.
The heat dissipation pipeline 2 is snakelike, mounting bosses 25 are arranged on two sides of the heat dissipation pipeline 2 along the parallel pipeline section of the battery module 1, and a plurality of grooves matched with the outer wall of the battery cell 11 are formed in the side faces of the mounting bosses 25; the grooves on two sides of the parallel pipeline sections are symmetrically arranged, and two rows of grooves between two adjacent parallel pipeline sections are staggered by a certain distance; electric core 11 and recess in close contact with and through locating plate 3 and heat dissipation pipeline 2 fixed connection, locating plate 3 is fixed through fastener 4 with heat dissipation pipeline 2, and the heat conduction of battery module 1 production is to heat dissipation pipeline 2.
The inside minimum curved surface lamellar structure array 5 of three cycles that is provided with of heat dissipation pipeline, wherein, minimum curved surface lamellar structure array 5 of three cycles is formed at the three direction array of cartesian coordinate system by minimum curved surface lamellar structure unit cell 6 of three cycles, with 2 internal partitioning of heat dissipation pipeline into two regions that each other do not communicate: the outer area is a space between the three-period extremely-small curved-surface sheet structure array 5 and the heat dissipation pipeline 2, namely the phase-change material filling channel 61; the inner region is a fluid channel 62 formed by the three-cycle array of extremely-curved sheet structures 5.
The phase-change material is filled into the phase-change material filling channel 61 in the heat dissipation pipeline 2 through the phase-change material injection port 21 on the heat dissipation pipeline 2, and the cooling liquid continuously flows through the fluid channel 62 through the liquid inlet 22 on the heat dissipation pipeline 2, and finally flows out of the heat dissipation pipeline 2 through the liquid outlet 23 on the heat dissipation pipeline 2.
The surface of the three-period extremely-small curved-surface sheet structure is smooth and continuous, and has a large specific surface area, so that the heat exchange area is increased, and the flow resistance of the cooling liquid in the fluid channel 62 is reduced. Heat generated in the charging and discharging processes of the battery module 1 is conducted to the heat dissipation pipeline 2, one part of heat is stored in the phase-change material, and the other part of heat is taken away through the cooling liquid. When the phase-change material absorbs heat and reaches the phase-change temperature, the phase-change material is gradually melted into a liquid state, and the melted phase-change material reduces the temperature gradient of liquid cooling by utilizing the liquidity of the phase-change material, so that the temperature of the battery module is balanced. And after the phase-change material melts completely, the heat released by the battery module 1 cannot be absorbed continuously, the heat stored in the phase-change material is conducted to the cooling liquid, and the heat saturation phenomenon of the phase-change material is eliminated by using the cooling liquid. Minimum curved surface lamellar structure of tricycle integrates liquid cooling mode and phase change material cooling mode into a compact whole, has realized that the advantage on the performance is complementary, reduces the difference in temperature of power battery module when improving thermal management system heat dispersion, improves the temperature uniformity of power battery module.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. A phase change liquid cooling coupling heat management device of a power battery pack is characterized by comprising a battery module (1), a heat dissipation pipeline (2), a positioning plate (3) and a fastening piece (4); the battery module (1) mainly comprises a plurality of battery cores (11); the heat dissipation pipeline (2) is in a snake shape and integrally formed by parallel pipeline sections and connecting sections; mounting bosses (25) are arranged on two sides of the parallel pipeline section, and semi-cylindrical grooves are uniformly distributed on the side surfaces of the mounting bosses (25) and are used for being tightly matched with the outer wall of the battery cell (11); the grooves are symmetrically arranged, and two rows of grooves between two adjacent parallel pipeline sections are staggered; the end part of the parallel pipeline section is provided with a fixed through hole a (24); the positioning plate (3) is respectively positioned on the upper surface and the lower surface of the heat dissipation pipeline (2), is provided with a battery cell mounting hole (32) for fixing a battery cell (11), and is provided with a fixing through hole b (31) corresponding to the fixing through hole a (24); the fastener (4) fixes the heat dissipation pipeline (2) and the positioning plate (3) by using the fixing through hole; the three-period extremely-small curved surface sheet structure array (5) is integrally formed in the radiating pipeline (2), and the three-period extremely-small curved surface sheet structure array (5) divides the interior of the radiating pipeline (2) into two areas which are not communicated with each other and are respectively an external area and an internal area; the outer area is a space between the three-period extremely-small curved-surface sheet structure array (5) and the heat dissipation pipeline (2), namely the phase-change material filling channel (61); the inner area is a fluid channel (62) formed by a three-period extremely-small curved-surface sheet structure array (5); one end of the heat dissipation pipeline (2) is provided with a liquid inlet (22) of the fluid channel (62), and the other end is provided with a liquid outlet (23) of the fluid channel (62); the top of the heat dissipation pipeline (2) is also provided with a phase change material injection port (21).
2. The phase-change liquid-cooling coupling thermal management device for the power battery pack according to claim 1, wherein the three-cycle extremely-small-curved-surface sheet structure array (5) is formed by arranging three-cycle extremely-small-curved-surface sheet structure unit cells (6);
the three-period minimum curved surface is a P curved surface, and the implicit function mathematical expression of the three-period minimum curved surface is as follows:
p curved surface:
in the formula, x, y and z are coordinates of each curved surface point under a Cartesian coordinate system, l is the side length of a cube wrapped outside a three-cycle minimum curved surface, and C is a constant and has a value range of-1 to 1;
the three-period extremely-small-curved-surface sheet structure unit cell (6) is formed by closing two P curved surfaces with C different from 0, wherein the absolute values of C values in the two P curved surface expressions are equal.
3. The phase-change liquid-cooling coupling heat management device for the power battery pack according to claim 1, wherein heat-conducting silicone grease is coated in a groove in the side surface of the heat dissipation pipeline (2); along the length direction of the heat dissipation pipelines (2), two adjacent parallel heat dissipation pipelines (2) are staggered at intervals, and the positions of the two heat dissipation pipelines (2) which are separated are the same.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111215077 | 2021-10-19 | ||
| CN2021112150777 | 2021-10-19 |
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| Publication Number | Publication Date |
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| CN114944518A true CN114944518A (en) | 2022-08-26 |
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| CN202111478711.6A Pending CN114944518A (en) | 2021-10-19 | 2021-12-06 | Phase-change liquid cooling coupling heat management device for power battery pack |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115464156A (en) * | 2022-09-19 | 2022-12-13 | 上海交通大学 | 3D printing copper dual-channel radiator based on TPMS structure and preparation method thereof |
| CN116130828A (en) * | 2023-01-07 | 2023-05-16 | 广东永光新能源设计咨询有限公司 | New energy automobile battery package cooling system |
-
2021
- 2021-12-06 CN CN202111478711.6A patent/CN114944518A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115464156A (en) * | 2022-09-19 | 2022-12-13 | 上海交通大学 | 3D printing copper dual-channel radiator based on TPMS structure and preparation method thereof |
| CN115464156B (en) * | 2022-09-19 | 2023-11-28 | 上海交通大学 | TPMS structure-based 3D printing copper dual-channel radiator and preparation method thereof |
| CN116130828A (en) * | 2023-01-07 | 2023-05-16 | 广东永光新能源设计咨询有限公司 | New energy automobile battery package cooling system |
| CN116130828B (en) * | 2023-01-07 | 2023-11-07 | 广东永光新能源设计咨询有限公司 | New energy automobile battery package cooling system |
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