CN110911779B - Lithium battery pack mixing heat dissipation device - Google Patents
Lithium battery pack mixing heat dissipation device Download PDFInfo
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- CN110911779B CN110911779B CN201911221691.7A CN201911221691A CN110911779B CN 110911779 B CN110911779 B CN 110911779B CN 201911221691 A CN201911221691 A CN 201911221691A CN 110911779 B CN110911779 B CN 110911779B
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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
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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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
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
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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
- H01M10/6567—Liquids
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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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a mixed heat dissipation device for a lithium battery pack, which relates to the technical field of battery heat management and comprises a box body, an air cooling assembly, a phase change energy storage heat conduction plate, a liquid cooling assembly, a plastic box cover and a plastic bottom plate, wherein a plurality of groups of placing holes for placing battery cores are arranged on the plastic bottom plate, each group of placing holes consists of a plurality of placing holes which are arranged in parallel and inclined, two adjacent groups of placing holes are symmetrically arranged to form an air duct for air flow to pass through, the included angle between the placing holes and the front surface of the box body is 10 +/-5 degrees, the bottom of each battery core is positioned at the upper part of each placing hole, the phase change energy storage heat conduction plate is arranged at the lower part of each placing hole, and the upper end and the lower end of each phase change energy storage heat conduction plate are respectively contacted with each battery core and the liquid cooling assembly, the battery pack can dissipate heat more uniformly and more efficiently.
Description
Technical Field
The invention belongs to the technical field of battery thermal management, and particularly relates to a lithium battery pack hybrid heat dissipation device.
Background
The power battery is applied to the electric automobile and must be assembled, debugged and the like, and finally appears in the form of a battery pack, the battery pack is a closed system, the heat dissipation problem of the battery pack is one of the topics which people pay attention to, if the heat dissipation effect of the battery pack is poor, the service life of the battery is reduced, serious people can cause the battery to be ignited and exploded, and the life and property safety of people is seriously threatened.
In order to enable the battery pack to radiate heat more efficiently and uniformly, a plurality of technical learners propose a plurality of solutions, the existing market mainly adopts two forms of air cooling and liquid cooling, but the defects of low temperature of the battery at the air inlet side and high temperature of the battery at the air outlet side commonly exist in the air cooling, and the battery cannot be cooled uniformly; although the liquid cooling mode is better in cooling effect than air cooling, if the battery pack discharges with high power, the heat generated by the battery pack instantly is difficult to ensure to be quickly dissipated.
Aiming at the heat dissipation defect of the conventional lithium battery pack, in order to ensure that the heat dissipation of the battery pack is uniform and the heat dissipation is more efficient, the scheme provides a mixed heat dissipation mode of the lithium battery pack.
Disclosure of Invention
The present invention is directed to a hybrid heat dissipation device for a lithium battery pack, which solves the above-mentioned problems of the prior art.
The utility model provides a lithium cell package mixes heat abstractor, includes box, forced air cooling subassembly, phase change energy storage heat-conducting plate, liquid cooling subassembly, plastics case lid and plastics bottom plate, install the electric core that a plurality of was arranged side by side between plastics case lid and the plastics bottom plate, the case lid is installed at the top of box to be fixed in the box with electric core, forced air cooling unit mount is in the right side of box, and the left side of box is equipped with the air intake, be equipped with a plurality of groups on the plastics bottom plate and be used for placing the hole of electric core, every group places the hole and comprises a plurality of placing holes that set up side by side and slope, and two sets of adjacent placing holes symmetry set up in order to form the wind channel that supplies the air current to pass through, places the positive contained angle of hole and box 10 + -5, and places the cross sectional shape of hole and is the down-trapezoid, the bottom of electric core is located the upper portion of placing the hole, and phase change energy storage heat-conducting plate is installed in the lower part of placing the hole and its upper and lower both ends respectively with electric core, The liquid cooling components are in contact.
Preferably, the air cooling assembly comprises a wind collecting cover and a fan, the wind collecting cover is installed at the right end of the box body, and the fan is installed in the wind collecting cover.
Preferably, the liquid cooling assembly comprises a liquid cooling plate with a hollow structure inside, and the right end of the liquid cooling plate is provided with a water inlet and a water outlet and is connected to the water circulation system.
Preferably, the flow trajectory of the air flow in the air duct is a zigzag shape.
Preferably, the air inlet is positioned right opposite to the air inlet end of the air duct, and the number of the air inlet is consistent with that of the air duct.
Preferably, the plastic box cover is provided with a plurality of holes corresponding to the positive and negative electrodes of the battery cell.
The invention also discloses a lithium battery pack, which comprises the lithium battery pack hybrid heat dissipation device.
The invention also discloses an automobile comprising the lithium battery component.
Preferably, the vehicle is any one of an electric vehicle and a hybrid vehicle.
The invention has the advantages that:
according to the invention, a mode of combining air cooling, a phase change composite board and liquid cooling is adopted, so that the lithium battery can be quickly cooled, the cooling efficiency of the lithium battery is improved, the defect of low cooling efficiency of a single liquid cooling mode or a single air cooling mode is overcome, and the battery pack is more uniform and efficient in cooling.
According to the invention, the battery is placed in the bottom plastic part, the phase-change composite plate is embedded in the plastic part at the bottom of the battery, the liquid cooling plate is placed at the bottom of the composite material, when the battery works, heat emitted from the bottom of the battery can be transferred to the phase-change composite plate, the phase-change material in the composite plate generates phase change to absorb the heat, meanwhile, the heat can be transferred to the liquid cooling plate at the bottom, and the heat is taken away by cooling liquid in the liquid cooling plate through circulation, so that the temperature reduction of the battery is realized. And liquid in the liquid cooling plate can also transmit heat to the phase change composite board after external heating in winter, makes the phase change composite board heat for the lithium cell, realizes the heating function of lithium cell.
According to the invention, a certain gap exists between the batteries, the batteries have a certain inclination angle when being placed, and due to the gap existing between the batteries, heat emitted by the batteries during operation can be quickly dissipated into the environment, the heat can be quickly brought out of the box body through the fan on one side of the box body, and the batteries are placed at a certain angle, so that the contact area between cold air and the batteries can be larger, and meanwhile, the cold air can temporarily stay between the batteries, so that the heat dissipation effect of the batteries is better. In the scheme, the arrangement angle of the battery is 10 +/-5 degrees, the angle is not too large or too small, if the angle is too large, the resistance of the fan to air suction is increased, and heat is not easy to be taken away; if the angle undersize, cold wind can be quick flows through between the battery, and cold wind can not short-term the stay also, and the area of contact of cold wind and battery also can diminish simultaneously, is unfavorable for the heat dissipation.
Drawings
Fig. 1 is an overall schematic view of a lithium battery pack with a concealed case cover and a plastic cover plate according to the present invention.
Fig. 1a is a top view of fig. 1.
Fig. 2 is an overall exploded view of the present invention.
Fig. 3 is an exploded view of a battery module according to the present invention.
Fig. 4 is a schematic structural view of the plastic base plate according to the present invention.
Fig. 5 is a top view and a cross-sectional view of a plastic chassis of the present invention.
The solar battery comprises a battery module 1, a battery module 12, a box cover 2, a wind collecting cover 3, a fan 4, a liquid cooling plate 5, a box body 6, a plastic cover plate 7, an electric core 8, a plastic bottom plate 9, an upper side 91, a lower side 92, a phase change energy storage heat conduction plate 10, an air inlet 11 and a placing hole 13.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 5, a mixed heat dissipation device for a lithium battery pack comprises a box body 6, an air cooling assembly, a phase change energy storage heat conduction plate 10, a liquid cooling assembly, a plastic cover plate 7 and a plastic bottom plate 9, wherein a plurality of battery cells 8 arranged in parallel are installed between the plastic cover plate 7 and the plastic bottom plate 9, a box cover 2 is installed at the top of the box body 6, the battery cells 8 are fixed in the box body 6, the air cooling assembly is installed at the right side of the box body 6, an air inlet 11 is arranged at the left side of the box body 6, a plurality of groups of placing holes 13 used for placing the battery cells 8 are arranged on the plastic bottom plate 9, each group of placing holes 13 is composed of a plurality of placing holes 13 which are arranged in parallel and inclined, two adjacent groups of placing holes 13 are symmetrically arranged to form an air duct for air flow to pass through, the included angle between the placing holes 13 and the front surface of the box body 6 is 10 +/-5 degrees, and the cross section of the placing holes 13 is in an inverted trapezoid shape, the bottom of the battery cell 8 is located on the upper portion of the placing hole 13, and the phase change energy storage heat conduction plate 10 is installed on the lower portion of the placing hole 13, and the upper end and the lower end of the phase change energy storage heat conduction plate are respectively contacted with the battery cell 8 and the liquid cooling assembly. All the cells 8 on each plastic base plate 9 form a battery module 1.
In this embodiment, the air cooling assembly includes a wind collecting cover 3 and a fan 4, the wind collecting cover 3 is installed at the right end of the box body 6, and the fan 4 is installed in the wind collecting cover 3.
In this embodiment, the liquid cooling assembly includes a liquid cooling plate 5 with a hollow structure inside, and the right end of the liquid cooling plate 5 is provided with a water inlet and a water outlet and is connected to the water circulation system.
In this embodiment, the flow trajectory of the airflow in the air duct is a zigzag shape. Can let cold wind and bigger area of contact of battery, cold wind can short-term the staying between the battery simultaneously, makes the radiating effect of battery better
In this embodiment, the air inlet 11 is located opposite to the air inlet end of the air duct, and is consistent in number with the air duct. The purpose is in order to realize accurate air inlet, and cold wind directly aims at the air inlet end in wind channel promptly, improves the radiating efficiency.
In this embodiment, the plastic cover plate 7 is provided with a plurality of holes corresponding to the positive and negative electrodes of the battery cell 8. The leakage of the positive electrode and the negative electrode of the electric core 8 is ensured, the electric core 8 is convenient to be connected in series and in parallel, meanwhile, the integrity of a gap air duct between the electric cores 8 can be ensured by utilizing the plastic cover plate 7, the function of the plastic cover plate is similar to that of the air collecting cover 3, and the air cooling system can be ensured to smoothly circulate according to the right side view of the figure 1.
The working process and principle of the invention are specifically explained below:
as shown in fig. 2, when the battery works to emit heat, cold air enters a gap between the battery cells 8 in the battery modules 1 and 12 through the air inlet 11 at the rear of the box 6, temperature sensors are distributed in the battery module 1, when the battery cells reach a set temperature, the fan 4 is turned on, at this time, the fan 4 brings the heat in the battery module 1 out of the box through the air collecting cover 3, the cold air enters the box from the air inlet 11 to cool the battery cells in an accelerated manner, the air collecting cover 3 mainly ensures that hot air can be smoothly brought out of the box by the fan 4, and the whole air circulation direction is as shown in the right side view of fig. 1.
Fig. 3 is an exploded view of the battery module 1, and the cell arrangement angle of the battery module 12 is symmetrical to that of the battery module 1, and the rest is the same. The phase change energy storage heat conduction plate 10 is arranged at the bottom of the plastic bottom plate 9, the phase change energy storage heat conduction plate 10 is contacted with the bottom of the electric core 8 by coating heat conduction silica gel, so that the heat emitted from the bottom of the battery can be smoothly transferred into the phase change energy storage heat conduction plate 10, when the battery 8 works to generate heat, the heat generated from the bottom of the electric core 8 can be transferred into the phase change energy storage heat conduction plate 10, the filler in the phase change energy storage heat conduction plate 10 can absorb the heat to generate phase change, meanwhile, the phase change energy storage heat conduction plate 10 is contacted with the liquid cooling plate 5 at the bottom of the box body, the heat can be transferred into the liquid cooling plate 5, the heat can be taken out of the box body after the cooling liquid in the liquid cooling plate 5 is circulated, the quick heat dissipation of the battery is realized, when the temperature is lower in winter, if the lithium battery 8 needs to be heated, the cooling liquid in the liquid cooling plate 5 can be heated and then enters the liquid cooling plate can heat the phase change energy storage heat conduction plate 10, the lithium battery is heated through the phase-change energy-storage heat-conducting plate 10.
As shown in fig. 4 and 5, which are schematic diagrams of the plastic base plate 9, when the battery cells 8 are placed on the plastic base plate 9, the placing holes 13 with an inclination angle of 10 ± 5 ° are formed, and the angle is not too large or too small, and if the angle is too large, the resistance of the fan to wind becomes large, and heat is not easily taken away; if the angle is too small, cold air can rapidly flow between the batteries, the cold air cannot temporarily stay, and meanwhile, the contact area between the cold air and the batteries is reduced, so that heat dissipation is not facilitated; electric core 8 is located the upper portion side 91 of plastics bottom plate 9, guarantees that electric core 8 arranges according to setting for the direction, and phase change energy storage heat-conducting plate 10 side contacts with the lower part side 92 of material bottom plate 9, and the bottom is located same horizontal plane with plastics bottom plate 9, guarantees that phase change energy storage heat-conducting plate 10 bottom surface and liquid cooling board 5 fully contact, can make the heat that electric core 8 bottom produced transmit to liquid cooling board 5 through phase change energy storage heat-conducting plate 10 smoothly on.
As can be seen from the above description, a part of the heat generated by the lithium battery during operation is carried out of the box 6 by the fan 4 through the air duct. The other part is taken out of the box body 6 through the phase change energy storage heat conduction plate 10 and the liquid cooling plate 5, and meanwhile, the liquid cooling plate 5 also has a heating function; this scheme realizes the quick heat dissipation of battery package through the mode that forced air cooling, phase change energy storage heat conduction and liquid cooling combined together, reduces the lithium cell temperature, improves the life of lithium cell, eliminates the overheated hidden danger that brings of lithium cell.
The invention also discloses a lithium battery pack, which comprises the lithium battery pack hybrid heat dissipation device. That is, any lithium battery pack to which the hybrid heat dissipation device of the present invention is applied is included in the present invention.
The invention also discloses an automobile comprising the lithium battery component. That is, any vehicle to which the lithium battery pack of the present invention is applied is included in the present invention. The automobile is any one of an electric automobile and a hybrid electric automobile.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (6)
1. The mixed heat dissipation device for the lithium battery pack is characterized by comprising a box body (6), an air cooling assembly, a phase change energy storage heat conduction plate (10), a liquid cooling assembly, a plastic cover plate (7) and a plastic bottom plate (9), wherein a plurality of battery cores (8) which are arranged side by side are installed between the plastic cover plate (7) and the plastic bottom plate (9), a box cover (2) is installed at the top of the box body (6), the battery cores (8) are fixed in the box body (6), the air cooling assembly is installed on the right side of the box body (6), an air inlet (11) is formed in the left side of the box body (6), a plurality of groups of placing holes (13) for placing the battery cores (8) are formed in the plastic bottom plate (9), each group of placing holes (13) is composed of a plurality of placing holes (13) which are obliquely arranged side by side, and two adjacent groups of placing holes (13) are symmetrically arranged to form an air duct for passing air flow, the included angle between the placing hole (13) and the front face of the box body (6) is 10 +/-5 degrees, the cross section of the placing hole (13) is in an inverted trapezoid shape, the bottom of the battery cell (8) is positioned at the upper part of the placing hole (13), the phase change energy storage heat conduction plate (10) is installed at the lower part of the placing hole (13), and the upper end and the lower end of the phase change energy storage heat conduction plate are respectively contacted with the battery cell (8) and the liquid cooling assembly;
the air cooling assembly comprises a wind gathering cover (3) and a fan (4), the wind gathering cover (3) is installed at the right end of the box body (6), and the fan (4) is installed in the wind gathering cover (3);
the liquid cooling assembly comprises a liquid cooling plate (5) with a hollow structure, and a water inlet and a water outlet are formed in the right end of the liquid cooling plate (5) and connected to a water circulation system;
the flow track of the air flow in the air duct is in a fold line shape.
2. The hybrid heat dissipation device of claim 1, wherein: the air inlet (11) is arranged right opposite to the air inlet end of the air duct and is consistent with the air duct in number.
3. The hybrid heat dissipation device of claim 1, wherein: the plastic cover plate (7) is provided with a plurality of holes corresponding to the positive and negative electrodes of the battery cell (8).
4. A lithium battery cell pack characterized by: hybrid heat sink comprising a lithium battery pack according to any of claims 1 to 3.
5. An automobile, characterized in that: comprising the lithium battery cell pack of claim 4.
6. An automobile according to claim 5, wherein: the automobile is any one of an electric automobile and a hybrid electric automobile.
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CN201911221691.7A CN110911779B (en) | 2019-12-03 | 2019-12-03 | Lithium battery pack mixing heat dissipation device |
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CN201911221691.7A CN110911779B (en) | 2019-12-03 | 2019-12-03 | Lithium battery pack mixing heat dissipation device |
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CN110911779B true CN110911779B (en) | 2022-08-02 |
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CN207530083U (en) * | 2017-11-10 | 2018-06-22 | 扬州骄扬机械科技有限公司 | A kind of lithium ion power battery used for electromobile packet |
CN107863588A (en) * | 2017-12-08 | 2018-03-30 | 南昌航空大学 | A kind of heat management coupled system of dynamic lithium battery group |
CN108808160A (en) * | 2018-05-15 | 2018-11-13 | 上海汽车集团股份有限公司 | High intensity heat transfer structure for cooling down power battery |
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