CN113394484B - Refrigerating device and method based on high-capacity rechargeable battery - Google Patents

Refrigerating device and method based on high-capacity rechargeable battery Download PDF

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Publication number
CN113394484B
CN113394484B CN202110938652.XA CN202110938652A CN113394484B CN 113394484 B CN113394484 B CN 113394484B CN 202110938652 A CN202110938652 A CN 202110938652A CN 113394484 B CN113394484 B CN 113394484B
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heat
battery
cavity
plate
capillary tube
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CN113394484A (en
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张敏
王任远
杜学芳
赵斌
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Henan Institute of Technology
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Henan Institute of Technology
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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
    • 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
    • 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
    • H01M10/63—Control systems
    • H01M10/635—Control systems based on ambient temperature
    • 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
    • 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
    • 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
    • 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)
  • Automation & Control Theory (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a refrigerating device and a method based on a high-capacity rechargeable battery, which comprises the following steps: the heat dissipation main body comprises a fixed plate, and the surface of the fixed plate is connected with the cooling mechanism and the telescopic main body; the cooling mechanism comprises a clamping plate, the surface of the clamping plate is connected with the fan, and one surface of the fixing plate, which is back to the fan, is attached to the battery; the cooling mechanism also comprises a heat exchange body, one end of the heat exchange body, which is contacted with the battery, is a heat absorption end, and the other end of the heat exchange body is a heat dissipation end; a first cavity is formed in the heat exchanger, a first capillary tube is arranged at the heat absorption end, and the first capillary tube is communicated with the first cavity; negative pressure is pumped in the first cavity, and volatile liquid with low boiling point is filled in the cavity; the radiating end is provided with a plurality of radiating fins, and second cavities are arranged in the radiating fins; the side wall of the heat exchange body is provided with a second capillary tube; the refrigerating device and the method realize continuous cooling and refrigeration, avoid the rapid rise of the temperature of the battery, prevent potential safety hazards and accidents of the battery caused by overheating, and improve the safety of the battery.

Description

Refrigerating device and method based on high-capacity rechargeable battery
Technical Field
The invention belongs to the technical field of refrigeration and heat dissipation of batteries, and particularly relates to a refrigeration device and method based on a high-capacity rechargeable battery.
Background
With the increasing requirement on carbon emission, in the automobile market, the sales volume of fuel vehicles is continuously influenced and impacted by electric vehicles, and the sales volume of electric vehicles (including pure electric vehicles and hybrid electric vehicles) is continuously increased. The development of electric vehicles has driven a great demand for rechargeable batteries, particularly for high-capacity rechargeable batteries (power batteries). At present, a power battery of an electric automobile generally adopts a ternary lithium battery or a lithium iron phosphate battery. During the charging and discharging processes of the high-capacity rechargeable battery, chemical reaction heat can be generated inside the battery, and if the heat can not be dissipated in time, the performance and the safety of the battery can be affected; but also causes heat to build up and cause a rapid rise in temperature when a short circuit occurs by accident. The increase of the temperature may affect the safety performance of the battery, and even cause serious safety accidents such as explosion.
In the prior art, a heat dissipation structure is generally arranged on a battery shell for a large-capacity rechargeable battery, but the heat dissipation of the large-capacity rechargeable battery by the structural design only reduces the heat accumulation to a certain extent, and the technical problem of the rapid rise of the battery temperature is not fundamentally solved. Based on the technical problems in the prior art, the invention discloses a refrigeration method based on a high-capacity rechargeable battery, which can refrigerate and cool the high-capacity rechargeable battery and reduce heat accumulation, thereby avoiding the rapid height of the battery temperature, preventing potential safety hazards and safety accidents of the battery caused by overheating, and improving the safety of the high-capacity rechargeable battery.
Disclosure of Invention
The invention aims to provide a refrigerating device and a refrigerating method based on a high-capacity rechargeable battery, which are used for solving the technical problem that the temperature of the high-capacity rechargeable battery is rapidly increased due to heat accumulation in the charging and discharging processes or when short circuit happens accidentally in the background art, can cool the high-capacity rechargeable battery, reduce the heat accumulation, avoid the rapid increase of the temperature of the battery, prevent potential safety hazards and safety accidents of the battery due to overheating, and improve the safety of the high-capacity rechargeable battery.
The temperature during the charging process can not be kept within an effective temperature range, or the temperature is high or low, which easily causes the problems of explosion or short circuit of the charged device.
In order to achieve the above object, the present invention provides a technical solution,
in order to better radiate and refrigerate the high-capacity rechargeable battery and prevent the temperature of the battery from being excessively increased due to the accumulation of heat, the invention also discloses a refrigerating device based on the high-capacity rechargeable battery, which comprises:
the cooling device comprises a cooling main body, a heat dissipation main body and a heat dissipation device, wherein the cooling main body comprises a fixed plate, and the surface of the fixed plate is connected with a cooling mechanism and a telescopic main body;
the cooling mechanism comprises a clamping plate, the surface of the clamping plate is connected with a fan, and the surface of the fan is connected with a sliding plate;
the telescopic main body comprises a bottom plate, a partition plate is connected to the surface of the bottom plate, a second spring column is connected to the surface of the bottom plate, and a stretching plate is connected to the surface of the second spring column.
Preferably, the surface of the fixing plate is connected with a clamping plate, the inner surface of the clamping plate is provided with a sliding groove, the surface of the sliding groove is connected with sliding plates in a sliding manner, and the sliding plates are connected to the surfaces of the two sides of the fan.
Preferably, the surface of the clamping plate is connected with a limiting plate in a sliding manner, the surface of the limiting plate is connected with a connecting plate, the surface of the connecting plate is connected with a pulling plate, and the limiting plate is connected to an opening of the sliding chute in a sliding manner.
Preferably, the inside connection of second splint has the locating plate, the surface at the splint is connected to the locating plate, the internal surface of locating plate is connected with first spring post.
Preferably, the surface of the fixing plate is provided with air holes in a penetrating mode, the surface of the fixing plate is connected with the sucker columns, and the surface of the fixing plate is connected with the base plate.
Preferably, the inner surface of the fixed plate is slidably connected with a telescopic main body, the inner surface of the telescopic main body is connected with a bottom plate, the surface of the bottom plate is connected with a stretching plate, the surface of the stretching plate is connected with a second spring column, and the second spring column is connected in the placing groove.
Preferably, the surface of the fan is movably connected with an air hole, the surface of the air hole is connected with a grating plate, and the surface of the grating plate is connected with a backing plate.
Preferably, the fixing plate is made of a metal material, particularly a metal material favorable for heat dissipation, especially one of aluminum, aluminum alloy, copper and copper alloy, or a mixed material of the above metal materials.
Preferably, the battery is provided with a temperature sensor for collecting temperature data of the battery and transmitting the temperature data to the processor; when the collected temperature reaches a preset threshold value, the processor controls the fan to work to dissipate heat.
Preferably, the surface of the fixing plate, which faces away from the fan, is attached to the battery, especially to the part of the battery which generates more heat, so as to ensure better heat dissipation. The heat-conducting coating is coated between the side, back to the fan, of the fixing plate and the battery, so that heat dissipation and heat conduction of the battery are better facilitated.
Preferably, the cooling mechanism further comprises a heat exchanger, one end of the heat exchanger, which is in contact with the battery, is a heat absorption end, and the other corresponding end of the heat exchanger is a heat dissipation end; a first cavity is formed in the heat exchanger, a first capillary tube is arranged at the heat absorption end, and the first capillary tube is communicated with the first cavity; the first cavity is pumped to be in a negative pressure state, and volatile liquid with low boiling point, in particular unsaturated hydrocarbon refrigerant, is arranged in the cavity.
Preferably, the heat dissipation end is provided with a plurality of heat dissipation fins, and second cavities are arranged in the heat dissipation fins; the first cavity is communicated with the second cavity.
Preferably, a second capillary tube is arranged on the side wall of the heat exchange body, one end of the second capillary tube is arranged at the heat absorption end, and the other end of the second capillary tube is communicated with the second cavity. The first capillary and the second capillary are communicated at the heat absorption end. The diameter phi of the first capillary and the second capillary is 0.65-0.86 mm.
Preferably, the material of the heat exchange body is one of aluminum, aluminum alloy, copper and copper alloy.
Preferably, the heat absorption end is attached to the heating surface or the upper end surface of the battery so as to absorb heat better; and a heat-conducting coating is coated between the heat absorption end and the battery heating surface, so that the heat dissipation and heat conduction of the battery are better facilitated.
Preferably, the pressure P after the negative pressure is pumped in the first cavity is (1.2-1.4) × (10)-1-10-4)Pa；
Preferably, in order to further improve heat dissipation, a pressure P after negative pressure is drawn in the first cavity and a diameter Φ · P of the first capillary and the second capillary satisfy 0.85 × (10)-1-10-4) 1.12X (10) or less-1-10-4)。
Preferably, the ratio delta of the height of the first capillary tube at the heat absorption end to the total height of the heat exchange body is 0.25-0.36; in particular, in order to better radiate heat, radiate heat and refrigerate the battery and prevent the temperature of the battery from being excessively increased due to accumulation of heat, the diameters phi of the first capillary tube and the second capillary tube, the pressure P after negative pressure is pumped in the first cavity, and the ratio delta of the height of the first capillary tube at the heat absorbing end to the total height of the heat exchange body satisfy the following relations:
φ/δ=α·(π·P)；
wherein alpha is a relation coefficient and has a value range of (0.54-0.68) x (10)1-104) (ii) a And pi is the circumferential ratio.
Preferably, the fan and the heat exchanger may be provided on different surfaces of the battery, or may be provided on the same surface.
Preferably, the fan and the heat exchange body are plural.
In order to better cool, radiate and refrigerate the high-capacity rechargeable battery, the invention also discloses a refrigeration method based on the high-capacity rechargeable battery, which comprises the following steps:
s1, the temperature sensor collects temperature data of the battery and transmits the collected temperature data to the processor;
s2, when the collected temperature data reach a preset threshold value, the processor controls the fan to work so as to be beneficial to heat dissipation;
s3, absorbing heat on the battery by liquid in the capillary tube inside the heat absorption end of the heat exchange body and then gasifying the liquid;
s4, after being gasified to the heat dissipation end, the liquid is liquefied by heat release when being cooled, and then flows into the capillary tube at the heat absorption end;
the process of S5 and the steps S3-S4 are repeated, so that continuous cooling and refrigeration are realized, the rapid rise of the temperature of the battery is avoided, the potential safety hazard and safety accidents caused by overheating of the battery are prevented, and the safety of the high-capacity rechargeable battery is improved.
Preferably, the temperature sensor is disposed on the battery, particularly, where the heat release amount is the largest.
Preferably, the processor can be arranged on the battery or arranged outside the battery.
Compared with the prior art, the refrigerating device and the method based on the high-capacity rechargeable battery have the following beneficial effects:
1. according to the refrigerating device and the method based on the high-capacity rechargeable battery, the sliding groove is connected with the limiting plate, the fan slides into the clamping plate through the sliding groove to generate airflow, and the fan is connected with the grid plate through the backing plate, so that the fan can be effectively prevented from adsorbing the charging device through the air holes to cause short circuit of the refrigerating device when cooling the charging device, and therefore only the rotating speed of the fan needs to be regulated and controlled under different environments, and the danger of short circuit or explosion of the battery is avoided.
2. According to the refrigerating device and method based on the high-capacity rechargeable battery, the stretching plate is connected with the bottom plate, and the stretching plate is connected with the bottom plate, so that the length of the fixing plate is changed.
3. The refrigerating device and method based on the high-capacity rechargeable battery are characterized in that the heat exchange body is arranged, the capillary tube is arranged at the heat absorption end, when the heat absorption end of the heat exchange body is heated, liquid in the first capillary tube and the second capillary tube is evaporated and vaporized, steam flows to the heat dissipation end under the action of pressure difference, heat is released from the heat dissipation end to be condensed into liquid, and the liquid flows back to the heat absorption end, so that the continuous dissipation of the heat of the battery is realized, the heat dissipation and refrigeration of the battery are further realized, and the excessive rise of the temperature of the battery caused by the accumulation of the heat is prevented.
4. According to the refrigerating device and method based on the high-capacity rechargeable battery, the diameter phi of the first capillary tube and the diameter phi of the second capillary tube and the range and the relation of the pressure P after negative pressure is pumped in the first cavity are set, so that better heat dissipation is achieved.
5. According to the refrigerating device and method based on the high-capacity rechargeable battery, the diameter phi of the first capillary tube and the diameter phi of the second capillary tube, the pressure P after negative pressure is pumped in the first cavity and the ratio delta of the height of the first capillary tube at the heat absorption end to the total height of the heat exchange body are set to meet the requirements, so that heat dissipation is better performed, the battery is cooled, and excessive rise of the temperature of the battery caused by heat accumulation is prevented.
Drawings
Fig. 1 is a flow chart of a cooling method based on a large-capacity rechargeable battery.
Fig. 2 is a schematic structural diagram of the refrigeration device of the present invention.
Fig. 3 is a schematic front view of a local connection structure of a limiting plate and a connecting plate according to the invention.
FIG. 4 is a schematic top view of a junction in accordance with the present invention.
Fig. 5 is a schematic view of the stretched board of the invention after being unfolded.
Fig. 6 is a schematic view of a partial connection structure of the first spring post and the pulling plate according to the present invention.
Fig. 7 is a schematic structural diagram of the heat exchange body of the present invention.
Fig. 8 is a cross-sectional view of the heat exchange body of the present invention taken along plane a in fig. 7.
In the figure: 1. a heat dissipating body; 11. a fixing plate; 2. a cooling mechanism; 21. a splint; 22. a slide plate; 23. a fan; 24. a limiting plate; 25. a connecting plate; 26. pulling a plate; 27. positioning a plate; 28. a first spring post; 29. a base plate; 210. a grid plate; 211. a sucker column; 212. a wind hole; 213. a chute; 3. a telescoping body; 31. a base plate; 32. a partition plate; 33. a placement groove; 34. a second spring post; 35. stretching the plate; 4. a heat exchange body; 41. a first capillary tube; 42. a second capillary tube; 43. a first cavity; 44. a heat sink; 45. a second cavity; 46. a heat absorption end; 47. a heat dissipation end; 48. communicating with a pipeline.
Detailed Description
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. 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.
Example 1
Referring to fig. 1, a cooling method based on a large-capacity rechargeable battery includes the following steps:
s1, the temperature sensor collects temperature data of the battery and transmits the collected temperature data to the processor;
s2, when the collected temperature data reach a preset threshold value, the processor controls the fan to work so as to be beneficial to heat dissipation;
s3, the liquid in the capillary tube inside the heat absorption end 46 of the heat exchange body 4 absorbs the heat on the battery and then is gasified;
s4, after being gasified to the heat dissipation end 47, the liquid is liquefied by heat release when being cooled, and then flows into the capillary tube of the heat absorption end 46;
the process of S5 and the steps S3-S4 are repeated, so that continuous cooling and refrigeration are realized, the rapid rise of the temperature of the battery is avoided, the potential safety hazard and safety accidents caused by overheating of the battery are prevented, and the safety of the high-capacity rechargeable battery is improved.
The temperature sensor is disposed on the battery, particularly where the amount of heat release is greatest. The processor may be disposed on the battery or disposed external to the battery.
Example 2
In order to better dissipate and cool the heat of the large-capacity rechargeable battery and prevent the temperature of the battery from being excessively increased due to the accumulation of heat, the invention also discloses a cooling device based on the large-capacity rechargeable battery, which comprises the following components:
the cooling device comprises a cooling main body, a heat dissipation main body and a heat dissipation device, wherein the cooling main body comprises a fixed plate, and the surface of the fixed plate is connected with a cooling mechanism and a telescopic main body;
the cooling mechanism comprises a clamping plate, the surface of the clamping plate is connected with a fan, and the surface of the fan is connected with a sliding plate;
the telescopic main body comprises a bottom plate, a partition plate is connected to the surface of the bottom plate, a second spring column is connected to the surface of the bottom plate, and a stretching plate is connected to the surface of the second spring column.
The surface of the fixing plate is connected with a clamping plate, the inner surface of the clamping plate is provided with a sliding groove, the surface of the sliding groove is connected with sliding plates in a sliding mode, and the sliding plates are connected to the surfaces of the two sides of the fan.
The surface of the clamping plate is connected with a limiting plate in a sliding mode, the surface of the limiting plate is connected with a connecting plate, the surface of the connecting plate is connected with a pulling plate, and the limiting plate is connected to the opening of the sliding groove in a sliding mode.
The inside connection of second splint has the locating plate, the surface at the splint is connected to the locating plate, the internal surface of locating plate is connected with first spring post.
The surface of the fixing plate is provided with air holes in a penetrating mode, the surface of the fixing plate is connected with a sucker column, and the surface of the fixing plate is connected with a base plate.
The inner surface sliding connection of fixed plate has flexible main part, the internal surface connection bottom plate of flexible main part, the surface of bottom plate is connected with the extension board, the surface of extension board is connected with the second spring post, the second spring post is connected in the standing groove.
The surface of the fan is movably connected with an air hole, the surface of the air hole is connected with a grating plate, and the surface of the grating plate is connected with a backing plate.
The fixing plate is made of metal materials, particularly metal materials beneficial to heat dissipation, and especially one of aluminum, aluminum alloy, copper and copper alloy, or mixed materials of the metal materials.
The one side laminating of fixed plate dorsad fan is on the battery, especially the more part that generates heat of battery to guarantee to dispel the heat better. The heat-conducting coating is coated between the side, back to the fan, of the fixing plate and the battery, so that heat dissipation and heat conduction of the battery are better facilitated.
As shown in fig. 7-8, the temperature reducing mechanism further includes a heat exchanger 4, one end of the heat exchanger 4 contacting the battery is a heat absorbing end 46, and the other corresponding end is a heat dissipating end 47; a first cavity 43 is arranged in the heat exchange body 4, a first capillary tube 41 is arranged at the heat absorption end, and the first capillary tube 41 is communicated with the first cavity 43; the first cavity 43 is evacuated to a negative pressure, and a volatile liquid with a low boiling point, particularly an unsaturated hydrocarbon refrigerant, is provided at the bottom of the first cavity 43. The pressure P in the cavity is (1.2-1.4) × (10)-1-10-4)Pa。
The heat dissipation end 47 is provided with a plurality of heat dissipation fins 44, and the heat dissipation fins 44 are internally provided with second cavities 45; the first cavity 43 and the second cavity 45 are communicated through a communication pipe 48. A second capillary tube 42 is arranged on the side wall of the heat exchange body 4, one end of the second capillary tube 42 is arranged at the heat absorption end 46, and the other end is communicated with the second cavity 45. The first capillary 41 and the second capillary 42 are both in communication at a heat sink end 46. The diameters phi of the first capillary 41 and the second capillary 42 are 0.65-0.86 mm.
When the heat absorbing end 46 of the heat exchanger 4 is heated, the liquid in the first capillary 41 and the second capillary 42 is evaporated and vaporized, the vapor flows to the heat dissipating end 47 under the action of pressure difference, the heat is released from the heat dissipating end 47 and condensed into liquid, and the liquid flows back to the heat absorbing end 46, and the circulation is performed, so that the heat of the battery is continuously dissipated, the battery is further cooled and cooled, and the excessive rise of the temperature of the battery caused by the accumulation of the heat is prevented.
By the capillary effect of the first capillary tube 41 and the second capillary tube 42, volatilization and heat absorption of the refrigerant at the heat absorption end 46 of the heat exchange body 4 can be accelerated, heat absorption and refrigeration effects at the heat absorption end 6 can be improved, and heat dissipation at the heat dissipation end can be better promoted. After the first cavity 43 is pumped to a negative pressure state, the first capillary 41, the second capillary 42, the first cavity 43, the second cavity 45 and the like are communicated, so that the refrigerant can better volatilize, absorb heat, condense and dissipate heat in the negative pressure space, and the heat absorption and refrigeration effects on the battery are improved.
The heat exchange body 4 is made of one of aluminum, aluminum alloy, copper and copper alloy. The heat absorption end 46 is attached to the heating surface or the upper end surface of the battery to absorb heat better; and a heat-conducting coating is coated between the heat absorbing end 46 and the battery heating surface, so that the heat dissipation and heat conduction of the battery are better facilitated.
Example 3
The difference between this embodiment and embodiment 2 is that the pressure P after the negative pressure is pumped in the first cavity 43 is (1.2-1.4) × (10)-1-10-4) Pa; in order to better facilitate heat dissipation, a pressure P after negative pressure is pumped in the first cavity 43 and a diameter phi of the first capillary 41 and the second capillary 42 satisfy a condition that phi & P is greater than or equal to 0.85 × (10)-1-10-4) 1.12X (10) or less-1-10-4)。
The ratio δ of the height of the first capillary tube 41 at the heat absorption end 46 to the total height of the heat exchange body is 0.25-0.36; in particular, in order to better dissipate heat, cool the battery, and prevent the temperature of the battery from being excessively increased due to accumulation of heat, the diameters Φ of the first capillary tube 41 and the second capillary tube 42, the pressure P after the negative pressure is drawn in the first cavity 43, and the ratio δ of the height of the first capillary tube 41 at the heat absorbing end 46 to the total height of the heat exchanger satisfy the following relationship:
φ/δ=α·(π·P)；
wherein alpha is a relation coefficient and has a value range of (0.54-0.68) x (10)1-104) (ii) a And pi is the circumferential ratio.
Example 4
Referring to fig. 2-6, a cooling device based on a large-capacity rechargeable battery includes: heat dissipation main part 1, cooling mechanism 2, flexible main part 3, heat dissipation main part 1 is including fixed plate 11, and the surface connection of fixed plate 11 has cooling mechanism 2 and flexible main part 3.
Cooling mechanism 2, cooling mechanism 2 are including splint 21, and splint 21's surface is connected with fan 23, and fan 23's surface is connected with slide 22, and fan 23's surface swing joint has wind hole 212, and the surface of wind hole 212 is connected with grid plate 210, and grid plate 210's surface is connected with backing plate 29, and grid plate 210 is the multiunit, connects at the internal surface of backing plate 29, and backing plate 29 is two sets of, and grid plate 210 evenly distributed is on the internal surface of backing plate 29.
The telescopic body 3 and the telescopic body 3 comprise a bottom plate 31, a partition plate 32 is connected to the surface of the bottom plate 31, a second spring column 34 is connected to the surface of the bottom plate 31, a stretching plate 35 is connected to the surface of the second spring column 34, and a placing groove 33 is formed in the inner surface of the partition plate 32.
The surface of fixed plate 11 is connected with splint 21, and spout 213 has been seted up to splint 21's internal surface, and the sliding connection slide 22 in spout 213, slide 22 are connected on the both sides surface of fan 23, through the setting of fan 23, can effectively produce strong air current to reach the effect of cooling, the inside of fan 23 is provided with small motor, and small motor can control the rotational speed effectively, thereby realizes different air currents.
The surperficial sliding connection of splint 21 has limiting plate 24, and limiting plate 24's surface is connected with connecting plate 25, and connecting plate 25's surface is connected with arm-tie 26, and limiting plate 24 sliding connection can drive limiting plate 24 through pulling arm-tie 26 and produce the displacement at the opening part of spout 213 to the realization is to slide 22's fixed action.
The inside fixedly connected with locating plate 27 of splint 21, locating plate 27 link firmly in the surface of splint 21, and the internal surface of locating plate 27 is connected with first spring post 28, and through the effect of first spring post 28, because the surface at splint 21 is fixed to locating plate 27, so when carrying out the pulling to limiting plate 24 through arm-tie 26, because first spring post 28 has the resilience, so can reply to the normal position with arm-tie 26.
The surface of fixed plate 11 runs through and sets up wind hole 212, and the surface connection of fixed plate 11 has sucking disc post 211, and backing plate 29 is connected on the surface of fixed plate 11, through the connection of backing plate 29 and grid plate 210, can effectually make charging device and wind hole 212 leave the space, avoids the air current to adsorb charging device on the surface of fixed plate 11, causes the air current to block up.
The inner surface of the fixed plate 11 is slidably connected with the telescopic body 3, the inner surface of the telescopic body 3 is connected with the bottom plate 31, the surface of the bottom plate 31 is connected with the stretching plate 35, the surface of the stretching plate 35 is connected with the second spring column 34, the second spring column 34 is connected in the placing groove 33, and the effect of widening the fixed plate 11 can be effectively achieved through the arrangement of the bottom plate 31 so as to deal with charging devices with different sizes.
Example 5
In order to verify the effect of the technical solution of the present invention, in this embodiment, the following tests are used for verification, and in the following tests, the high-capacity rechargeable battery used is the same:
test 1:
by adopting the technical scheme in the embodiment 3 of the application, the rechargeable battery with large capacity which is being charged is refrigerated and absorbs heat, the number of the fan and the heat exchange body is one, and the diameters of the first capillary tube and the second capillary tube are both 0.7 mm.
Test 2:
by adopting the technical scheme in the embodiment 3 of the application, the rechargeable battery with large capacity which is being charged is refrigerated and absorbs heat, the number of the fan and the heat exchange body is one, the first capillary tube and the second capillary tube are both replaced by non-capillary tubes, the diameters of the tubes are both 7mm, and the rest of the tubes are the same as those in the experiment 1.
Test 3
The conventional fan is used to dissipate heat of a large-capacity rechargeable battery being charged, and the number of the fan is one. The fans used in the fan tests 1 and 2 were the same.
Tests show that the high-capacity rechargeable battery in the test 3 has the slowest heat dissipation, and then the test 2, and the fastest heat dissipation is the technical scheme adopted in the test 1. In test 1, the heat dissipation rate during charging of the large-capacity rechargeable battery was 45.4% higher than that in test 2 and 152.8% higher than that in test 3
By adopting the technical scheme, the temperature of the battery can be obviously kept at a safe level, the high-capacity rechargeable battery can be cooled when the temperature is rapidly increased due to heat accumulation caused by the fact that the high-capacity rechargeable battery is in the charging and discharging process or short circuit occurs accidentally, and the heat accumulation is reduced, so that the temperature of the battery is prevented from being rapidly increased, potential safety hazards and safety accidents caused by overheating of the battery are prevented, and the safety of the high-capacity rechargeable battery is improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (4)

1. A refrigeration device based on a high capacity rechargeable battery, the refrigeration device comprising:
the cooling device comprises a cooling main body, a heat dissipation main body and a heat dissipation device, wherein the cooling main body comprises a fixed plate, and the surface of the fixed plate is connected with a cooling mechanism and a telescopic main body;
the cooling mechanism comprises a clamping plate, the surface of the clamping plate is connected with a fan, and the surface of the fan is connected with a sliding plate;
the fixing plate is made of one of aluminum, aluminum alloy, copper and copper alloy; one surface of the fixing plate, which is back to the fan, is attached to the battery, and a heat-conducting coating is coated between the surface of the fixing plate, which is back to the fan, and the battery;
the cooling mechanism also comprises a heat exchange body, wherein one end of the heat exchange body, which is in contact with the battery, is a heat absorption end, and the other corresponding end of the heat exchange body is a heat dissipation end; a first cavity is formed in the heat exchanger, a first capillary tube is arranged at the heat absorption end, and the first capillary tube is communicated with the first cavity; the first cavity is pumped to be in a negative pressure state, and volatile liquid with a low boiling point is arranged in the first cavity; the heat dissipation end is provided with a plurality of heat dissipation fins, and second cavities are formed in the heat dissipation fins; the first cavity is communicated with the second cavity;
a second capillary tube is arranged on the side wall of the heat exchange body, one end of the second capillary tube is arranged at the heat absorption end, and the other end of the second capillary tube is communicated with the second cavity; the first capillary and the second capillary are communicated at the heat absorption end; the diameter phi of the first capillary and the second capillary is 0.65-0.86 mm; the pressure P after the negative pressure is pumped in the first cavity is (1.2-1.4) x (10)-1-10-4)Pa。
2. A cooling method for a large capacity rechargeable battery based cooling device as claimed in claim 1, characterized in that the cooling method comprises the following steps:
s1, the temperature sensor collects temperature data of the battery and transmits the collected temperature data to the processor;
s2, when the collected temperature data reach a preset threshold value, the processor controls the fan to work so as to be beneficial to heat dissipation;
s3, absorbing heat on the battery by liquid in the capillary tube inside the heat absorption end of the heat exchange body and then gasifying the liquid;
s4, after being gasified to the heat dissipation end, the liquid is liquefied by heat release when being cooled, and then flows into the capillary tube at the heat absorption end;
the process of S5 and the steps S3-S4 are repeated, so that continuous cooling and refrigeration are realized, the rapid rise of the temperature of the battery is avoided, the potential safety hazard and safety accidents caused by overheating of the battery are prevented, and the safety of the high-capacity rechargeable battery is improved.
3. A cooling method according to claim 2, wherein in the step S1, the temperature sensor is provided at a place where a heat release amount of the battery is maximum.
4. A method of cooling as claimed in claim 3, wherein the processor is located on or external to the battery.
CN202110938652.XA 2021-08-16 2021-08-16 Refrigerating device and method based on high-capacity rechargeable battery Active CN113394484B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208028191U (en) * 2018-03-02 2018-10-30 云南亿安水利水电建筑安装有限责任公司 A kind of power battery of liquid cooling and air-cooled combination heat dissipation
CN111180826A (en) * 2019-12-27 2020-05-19 合肥鸿叶紫新能源有限公司 New forms of energy battery cooling device that dispels heat
CN112670617A (en) * 2020-12-23 2021-04-16 林玉珍 Heat dissipation mechanism for new energy battery management
CN213367204U (en) * 2020-09-10 2021-06-04 刘雪霞 Quick-plugging type power box heat dissipation device for power distribution box

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208028191U (en) * 2018-03-02 2018-10-30 云南亿安水利水电建筑安装有限责任公司 A kind of power battery of liquid cooling and air-cooled combination heat dissipation
CN111180826A (en) * 2019-12-27 2020-05-19 合肥鸿叶紫新能源有限公司 New forms of energy battery cooling device that dispels heat
CN213367204U (en) * 2020-09-10 2021-06-04 刘雪霞 Quick-plugging type power box heat dissipation device for power distribution box
CN112670617A (en) * 2020-12-23 2021-04-16 林玉珍 Heat dissipation mechanism for new energy battery management

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