CN107221727B - All-weather electric automobile's lithium ion battery phase transition heat radiation structure - Google Patents
All-weather electric automobile's lithium ion battery phase transition heat radiation structure Download PDFInfo
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- CN107221727B CN107221727B CN201710452813.8A CN201710452813A CN107221727B CN 107221727 B CN107221727 B CN 107221727B CN 201710452813 A CN201710452813 A CN 201710452813A CN 107221727 B CN107221727 B CN 107221727B
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4207—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells for several batteries or cells simultaneously or sequentially
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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
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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
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
- H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The invention discloses a phase-change heat dissipation structure of a lithium ion battery of an all-weather electric automobile, which is characterized in that: the lithium ion battery pack mainly comprises a battery separator (4) with the lower surface embedded into a main lithium ion battery pack and the upper surface embedded into a liquid absorption core, a heat dissipation part arranged on the battery separator (4) and a battery bottom plate (5) arranged on the battery separator (4) and embedded into an auxiliary lithium ion battery pack. The invention has simple structure and low cost, can use the auxiliary lithium ion battery pack to supply power for the electric automobile when the environmental temperature is too low, and the auxiliary lithium ion battery pack can be used as an auxiliary battery to work and preheat the main lithium ion battery pack on the battery partition plate, so that the main lithium ion battery pack can be used for supplying power when the environmental temperature is proper, and can rapidly and effectively dissipate heat through the heat dissipation part, thereby ensuring safer and more reliable when the lithium ion battery is used for supplying power for the electric automobile, greatly prolonging the service life of the lithium ion battery, and being suitable for popularization and use.
Description
Technical Field
The invention relates to a heat dissipation structure, in particular to a phase change heat dissipation structure of a lithium ion battery of an all-weather electric automobile.
Background
For a long time, an electric automobile has the advantages of environmental protection, energy saving and the like as a new energy vehicle, but has no way to drive the position of a traditional fossil fuel automobile, and the main reason is that the battery of the electric automobile is the charging efficiency of the battery, and the service life of the battery. With the development of the fast charging technology, the bottleneck on the charging efficiency of the battery is about to break, but the study on the service life of the battery is still in progress. There are two reasons for influencing the service life of the battery, namely the attribute of the battery itself and the working environment of the battery. Generally, the working environment of the battery of the electric automobile is mainly the working temperature of the battery during working, and the working temperature of the battery has great influence on the service life of the lithium ion battery.
When the temperature is too high, various aspects of performance of the lithium ion battery can be affected to a certain extent, including internal electrochemical reaction of the battery, charge and discharge efficiency, power output, capacity maintenance, stability and the like. If the temperature continues to rise beyond the safe use limit range, explosion can occur, and the whole vehicle performance, reliability and safety of the electric vehicle can be affected. Researches show that the cycle times of the lithium battery are reduced by about 60% in a 45 ℃ working environment, particularly when the temperature is increased by 5 ℃ in high-rate discharge, the service life of the battery is reduced by 50%, and if a reasonable thermal management technology is adopted for the battery, the performance of the battery pack can be improved by 30% -40%.
Too low a temperature also affects the performance of the lithium ion battery. In order to understand the effect of low temperature on lithium batteries, the structure of lithium batteries is first analyzed. The basic structure of the lithium battery is simple, namely positive and negative poles and electrolyte in the middle, and the charge is transferred and filled along with chemical reaction to enable the battery to realize potential difference of the positive pole and the negative pole, then current is generated, and then the current drives a motor so as to enable an electric automobile to run. The electrolyte used in lithium batteries used in electric vehicles is an organic liquid that can become viscous or even coagulate at low temperatures. At this time, the activity of the conductive lithium salt in the lithium ion battery is greatly limited, so that the charging efficiency is very low, the lithium ion battery is charged slowly at a low temperature and is not fully charged, metal lithium is precipitated on the surface of the anode of the battery when the lithium ion battery is charged at the low temperature, and the process is irreversible. This causes permanent damage to the battery and reduces the safety of the battery. Many lithium battery devices have protection devices that prevent charging at low temperatures. As does the discharge. The battery capacity of the lithium ion battery can be influenced only temporarily in a short time under a low-temperature environment or under the condition of insufficient temperature, but permanent damage can not be caused. However, if used for a long time in a low temperature environment or in an ultra-low temperature environment of-40 ℃, the lithium ion battery may be damaged permanently by "freezing out".
Disclosure of Invention
The invention aims to overcome the defect that the service life of a battery is seriously influenced by overhigh or overlow ambient temperature when an electric automobile is powered by a lithium ion battery, and provides an all-weather lithium ion battery phase-change heat dissipation structure of the electric automobile, wherein the lithium ion battery phase-change heat dissipation structure can select an auxiliary lithium ion battery to work and preheat a main lithium ion battery when the temperature is overlow, and can rapidly and effectively dissipate heat when the main lithium ion battery works to generate a large amount of heat, so that the service life of the lithium ion battery can be greatly prolonged.
The aim of the invention is achieved by the following technical scheme:
the phase change heat dissipation structure of the lithium ion battery of the all-weather electric automobile is mainly composed of a battery partition board with a main lithium ion battery pack embedded in the lower surface and a liquid suction core embedded in the upper surface, a heat dissipation part arranged on the battery partition board and a battery bottom plate arranged on the battery partition board and embedded in a secondary lithium ion battery pack.
Further, the heat dissipation part comprises an upper cover arranged on the upper side of the battery partition board, a left condensing box arranged on the left side of the battery partition board and connected with the upper cover, and a right condensing box arranged on the right side of the heat dissipation main board and connected with the upper cover.
Still further, a battery pack mounting groove for mounting a lithium ion battery pack is formed in the lower surface of the battery separator, and a liquid suction core mounting groove for mounting a liquid suction core is formed in the upper surface of the battery separator; and a heat dissipation cavity communicated with the liquid suction core mounting groove is formed between the upper cover and the left side condensing box as well as between the upper cover and the right side condensing box.
Further, the width of the battery pack mounting groove is larger than that of the liquid suction core mounting groove, and the battery pack mounting groove is positioned between the two liquid suction core mounting grooves.
And the left side condensing box and the right side condensing box are respectively provided with a condensing cavity communicated with the liquid suction core mounting groove, and the battery separator is provided with a battery pack mounting groove baffle for separating the battery pack mounting groove from the condensing cavity.
In order to facilitate heat dissipation, the upper cover comprises an upper cover bottom plate which is arranged between the left side condensing box and the right side condensing box and is positioned above the battery partition plate, and two upper cover side plates which are respectively arranged at the front side and the rear side of the upper cover bottom plate and are both connected with the battery partition plate; and a heat dissipation cavity communicated with the left condensation air cavity, the right condensation air cavity and the liquid suction core mounting groove is formed between the two upper cover side plates and the upper cover bottom plate.
In order to better realize the invention, a plurality of upper cover partition plates which are connected with the upper cover bottom plate are arranged on the two upper cover side plates at intervals, and the length of the upper cover partition plates is smaller than the distance between the two upper cover side plates.
In order to ensure the effect, the battery bottom plate is provided with a secondary battery pack mounting groove, and the battery bottom plate is detachably mounted on the lower side of the battery separator.
Compared with the prior art, the invention has the following advantages:
(1) The invention has simple structure and low cost, the auxiliary lithium ion battery pack inserted in the battery bottom plate is selected to supply power to the electric automobile when the environmental temperature is too low, the auxiliary lithium ion battery pack is used as an auxiliary battery to work and can preheat the main lithium ion battery pack on the battery partition plate, the main lithium ion battery pack can be selected to supply power when the environmental temperature reaches the working temperature requirement of the main lithium ion battery pack, and the heat dissipation part arranged on the battery partition plate can be used for rapidly and effectively dissipating heat when the main lithium ion battery pack works to generate a large amount of heat, thereby ensuring safer and more reliable when the lithium ion battery is used for supplying power to the electric automobile and greatly prolonging the service life of the lithium ion battery.
(2) The battery separator can separate the lithium ion battery pack from the heat dissipation medium, so that the use safety of the battery separator can be ensured.
(3) A heat dissipation cavity communicated with the liquid suction core mounting groove is formed between the upper cover and the left side condensing box and between the upper cover and the right side condensing box, so that heat dissipation can be conveniently carried out in the process of circulating in the heat dissipation cavity after heat absorption and vaporization of working media.
(4) The width of the battery pack mounting groove is larger than that of the liquid suction core mounting grooves, the battery pack mounting groove is positioned between the two liquid suction core mounting grooves, when the battery pack is used, the lithium ion battery pack is mounted in the battery pack mounting groove, the liquid suction core is mounted in the liquid suction core mounting groove, and the working medium is adsorbed on the liquid suction core, so that the battery separator forms a carrier for bearing the lithium ion battery pack and the heat dissipation medium; meanwhile, a sufficient amount of lithium ion battery packs can be installed in a limited space, so that the space can be effectively saved.
(5) The left side condensing box and the right side condensing box are respectively provided with the condensing cavities communicated with the liquid suction core mounting groove, so that the gas working medium can be conveniently condensed into liquid and adsorbed on the liquid suction core again, and then the liquid working medium is used for continuously absorbing heat and carrying away the heat after vaporization, thereby forming a phase change cycle; the battery separator is provided with a battery pack mounting groove baffle for separating the battery pack mounting groove and the condensation cavity, so that working medium condensed into liquid in the condensation cavity can be prevented from entering the battery pack mounting groove to damage the lithium ion battery pack, and the safety of the lithium ion battery pack is improved during use.
(6) The upper cover comprises an upper cover bottom plate and two upper cover side plates, and a heat dissipation cavity which is respectively communicated with the left condensation air cavity, the right condensation air cavity and the liquid suction core mounting groove is formed between the two upper cover side plates and the upper cover bottom plate, so that liquid working medium in the liquid suction core can conveniently absorb heat and evaporate and then enter the heat dissipation cavity to dissipate heat.
(7) The upper cover side plates are provided with a plurality of upper cover partition plates which are connected with the upper cover bottom plate at intervals, the length of each upper cover partition plate is smaller than the distance between the two upper cover side plates, a flow guide channel which is bent from left to right and communicated with the condensing cavity can be formed in the whole heat dissipation cavity, and the gas working medium in the heat dissipation cavity can be guided into the condensing cavity for condensation through the flow guide channel; because the flow guide channel greatly prolongs the path of the gas working medium in the heat dissipation cavity entering the condensation cavity, the gas working medium can dissipate heat in the process of entering the condensation cavity through the flow guide channel.
(8) The secondary battery pack mounting groove is formed in the battery bottom plate, so that the secondary lithium ion battery pack is conveniently mounted in the secondary battery pack mounting groove; the battery bottom plate is detachably arranged on the lower side of the battery separator, so that a plurality of lithium ion battery packs which are arranged in the battery pack mounting groove and form a main lithium ion battery pack can be conveniently packaged, and the battery packs can be conveniently replaced after being detached; on the other hand, the auxiliary lithium ion battery pack can be used for preheating the main lithium ion battery pack in the environment with too low temperature.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a schematic structural view of a battery separator according to the present invention.
Fig. 3 is a cross-sectional view of a battery separator of the present invention.
Fig. 4 is a schematic structural view of the upper cover of the present invention.
Fig. 5 is a schematic view showing the structure of the upper cover and the battery bottom plate of the present invention mounted on the battery separator respectively.
Figure 6 is a schematic view of the structure of the left side condensing box of the present invention,
fig. 7 is a schematic view of the structure of the battery chassis of the present invention.
Wherein, the reference numerals are as follows:
1-left side condensing box, 2-upper cover, 21-upper cover bottom plate, 22-upper cover side plate, 23-upper cover partition plate, 3-right side condensing box, 4-battery partition plate, 5-battery bottom plate, 6-liquid suction core mounting groove, 7-battery pack mounting groove baffle, 8-battery pack mounting groove, 9-heat dissipation cavity, 10-condensing cavity and 11-auxiliary battery pack mounting groove.
Detailed Description
The present invention will be described in further detail with reference to examples, but embodiments of the present invention are not limited thereto.
Examples
As shown in fig. 1 to 7, the phase change heat dissipation structure of the lithium ion battery of the all-weather electric vehicle of the present invention is mainly composed of a battery separator 4, a heat dissipation member provided on the battery separator 4, and a battery bottom plate 5 provided on the battery separator 4. The lower surface of the battery separator 4 is embedded with a lithium ion battery pack, and the upper surface is embedded with a liquid suction core. The lithium ion battery pack generates heat during operation, the heat is conducted to the liquid suction core through the battery separator 4, and a condensing medium for heat dissipation is arranged in the liquid suction core. The working medium is in a liquid state at normal temperature and is adsorbed in the liquid absorption core, and when the liquid absorption core receives heat emitted by the lithium ion battery pack conducted by the battery separator 4, the working medium is heated and evaporated, and the heat is brought into the heat dissipation part to dissipate heat.
Meanwhile, a battery pack mounting groove 8 for mounting the main lithium ion battery pack is formed in the lower surface of the battery separator 4, and a wick mounting groove 6 for mounting a wick is formed in the upper surface of the battery separator 4, as shown in fig. 3. The plurality of the liquid suction core mounting grooves 6 are arranged, the liquid suction core mounting grooves 6 penetrate through the left side surface and the right side surface of the battery partition plate 4, the plurality of the battery pack mounting grooves 8 are also arranged, and in order to facilitate the installation of a sufficient amount of lithium ion battery packs in a limited space, the width of the battery pack mounting grooves 8 is larger than that of the liquid suction core mounting grooves 6. The plurality of lithium ion battery packs installed in the battery pack installation groove 8 constitute the main lithium ion battery pack of the present invention, which is used as a main power source for supplying power to the electric automobile. The battery pack mounting groove 8 is positioned between the two liquid suction core mounting grooves 6, and the side wall of the battery pack mounting groove 8 is the side wall of the liquid suction core mounting groove 6, so that the space can be effectively saved. When the lithium ion battery pack is used, the lithium ion battery pack is arranged in the battery pack mounting groove 8, the liquid suction core is arranged in the liquid suction core mounting groove 6, and the working medium is adsorbed on the liquid suction core, so that the battery separator 4 forms a carrier for bearing the lithium ion battery pack and the heat dissipation medium. The battery separator 4 is made of a material with good heat conduction performance, so that heat of the lithium ion battery pack can be conducted to the liquid suction core when the lithium ion battery pack works to generate heat, and the working medium is evaporated into gas after receiving the heat absorbed by the liquid suction core, so that heat dissipation can be performed.
In order to facilitate heat dissipation of the working medium gas, the heat dissipation component comprises an upper cover 2 arranged on the upper side of a battery separator 4, a left condensation cavity 1 arranged on the left side of the battery separator and a right condensation cavity 3 arranged on the right side of the battery separator 4, as shown in fig. 1. The upper cover 2 is located between the left condensation chamber 1 and the right condensation chamber 3, the right condensation chamber 3 has the same structure as the left condensation chamber 1, a heat dissipation cavity communicated with the liquid suction core mounting groove 6 is formed between the upper cover 4 and the left condensation chamber 1 and between the upper cover and the right condensation chamber 3, and a gas working medium can volatilize from the liquid suction core in the liquid suction core mounting groove 6 to the heat dissipation cavity, so that heat emitted by the lithium ion battery pack is taken away, and the purpose of heat dissipation can be achieved.
Specifically, the upper cover 2 includes an upper cover bottom plate 21 and upper cover side plates 22 disposed on both front and rear sides of the upper cover bottom plate 21, as shown in fig. 4. The upper cover bottom plate 21 is arranged between the left side condensing box 1 and the right side condensing box 3 and is positioned above the battery separator 4, and the two upper cover side plates 22 are respectively connected to the front side and the rear side of the battery separator 4. The height of the upper cover side plate 22 is larger than the thickness of the upper cover bottom plate 21, a heat dissipation cavity 9 is formed between the two upper cover side plates 22 and the upper cover bottom plate 21, the heat dissipation cavity 9 is communicated with the liquid suction core mounting groove 6, and as shown in fig. 5, working medium is heated and evaporated to be gas and volatilized into the heat dissipation cavity 9.
In order to facilitate condensation of the gas working medium into liquid and re-adsorption on the liquid suction core, then the liquid working medium continuously absorbs heat and takes away heat after vaporization, so as to form a phase change cycle, the left side condensation box 1 and the right side condensation box 3 are respectively provided with a condensation cavity 10 communicated with the liquid suction core mounting groove 6, as shown in fig. 6. Meanwhile, the battery separator 4 is provided with a battery pack mounting groove baffle 7 for separating the battery pack mounting groove 8 from the condensation cavity 10, as shown in fig. 2, so that working medium condensed into liquid in the condensation cavity 10 can be prevented from entering the battery pack mounting groove 8 to damage the lithium ion battery pack, and the safety of the battery pack cooling device can be improved in use.
Since the lithium ion battery pack positioned in the middle of the battery separator 4 is more concentrated, namely the temperature in the middle of the battery separator 4 is higher than the temperature at the two ends of the battery separator, the volatilization amount of the liquid working medium in the middle of the battery separator 4 is larger than the volatilization amount at the two ends of the battery separator, the liquid working medium is gasified and then becomes gas to directly rise and enter the heat dissipation cavity 9, the density of the working medium gas in the middle of the heat dissipation cavity 9 is larger than the density at the two ends of the heat dissipation cavity, and the temperature in the condensation cavities 10 at the left and right ends of the battery separator 4 is lower. In order to facilitate the introduction of the working fluid gas in the heat dissipation chamber 9 into the condensation chamber 10 for condensation and liquefaction, a plurality of upper cover partitions 23 are provided at intervals on the two upper cover side plates 22, as shown in fig. 4.
Specifically, the upper cover partition plates 23 are disposed in parallel from left to right in the heat dissipation chamber 9, the upper cover partition plates 23 are connected with the upper cover bottom plate 21, the length of each upper cover partition plate 23 is smaller than the distance between two upper cover side plates 22, two adjacent upper cover partition plates 23 are respectively connected to two upper side plates 22, a diversion passage can be formed between two adjacent upper cover partition plates 23, a diversion passage which is bent from left to right and is communicated with the condensation chamber 10 can be formed in the whole heat dissipation chamber 9, and the gas working medium in the heat dissipation chamber 9 can be guided into the condensation chamber 10 to be condensed through the diversion passage. The upper cover 2, the left condensing box 1 and the right condensing box 3 are made of materials with good heat dissipation performance, and as the flow guide channel greatly prolongs the path of the gas working medium in the heat dissipation cavity 9 entering the condensing cavity 10, the gas working medium can conduct heat out through the upper cover 2 in the process of entering the condensing cavity 10 through the flow guide channel, so that heat dissipation is carried out. When the gas working medium enters the condensation cavity 10 in the low-temperature environment, the gas working medium can be liquefied into liquid, and heat emitted by the liquefaction of the gas working medium can be led out through the left condensation box 1 and the right condensation box 3. The liquid suction core sucks the working medium liquefied into liquid in the condensation cavity 10 into the liquid suction core by utilizing capillary force, so that the liquid working medium can absorb the heat emitted by the lithium ion battery pack again and take away the heat after vaporization, and a phase change cycle can be formed.
Since the heat dissipation chamber 9, the condensation chamber 10 and the wick installation groove 6 together form a closed cavity, the cavity can be set to be in a vacuum or negative pressure state during implementation in order to ensure that the working substance can be effectively evaporated and condensed in the cavity. In practice, the wick may be a honeycomb wick structure, so as to ensure the reflux efficiency of the liquid working medium in the condensation chamber 10.
In order to facilitate the installation of the secondary lithium ion battery pack, the battery bottom plate 5 is provided with a secondary battery pack installation groove 11, and as shown in fig. 7, the secondary lithium ion battery pack can be installed in the secondary battery pack installation groove 11. The auxiliary lithium ion battery pack is used as an auxiliary power supply of the electric automobile, and can be used for protecting the main lithium ion battery pack when the environmental temperature is too low. The sub-battery pack mounting groove 11 of the present invention is provided on the upper surface of the battery bottom plate 5, and the sub-battery pack mounting groove 11 communicates with the battery pack mounting groove 8, and the battery bottom plate 5 is detachably mounted on the lower side of the battery separator 4. The arrangement can be convenient for packaging a plurality of lithium ion battery packs which are arranged in the battery pack mounting groove 8 and form a main lithium ion battery pack, and can be convenient for replacing the battery packs after being disassembled; on the other hand, the auxiliary lithium ion battery pack can be conveniently used in an environment with low temperature to quickly preheat the main lithium ion battery pack, so that the main lithium ion battery pack can quickly reach the ambient temperature and supply power for the electric automobile.
As described above, the present invention can be advantageously practiced.
Claims (1)
1. The utility model provides a lithium ion battery phase transition heat radiation structure of all-weather electric automobile which characterized in that: the lithium ion battery pack mainly comprises a battery separator (4) with the lower surface embedded into a main lithium ion battery pack and the upper surface embedded into a liquid absorption core, a heat dissipation part arranged on the battery separator (4) and a battery bottom plate (5) arranged on the battery separator (4) and embedded into an auxiliary lithium ion battery pack;
the heat dissipation component comprises an upper cover (2) arranged on the upper side of the battery partition board (4), a left condensation air cavity (1) arranged on the left side of the battery partition board (4) and connected with the upper cover (2), and a right condensation air cavity (3) arranged on the right side of the battery partition board (4) and connected with the upper cover (2);
a battery pack mounting groove (8) for mounting a lithium ion battery pack is formed in the lower surface of the battery separator (4), and a liquid suction core mounting groove (6) for mounting a liquid suction core is formed in the upper surface of the battery separator (4); a heat dissipation cavity communicated with the liquid suction core mounting groove (6) is formed between the upper cover (2) and the left condensation air cavity (1) and between the upper cover and the right condensation air cavity (3);
the width of the battery pack mounting groove (8) is larger than that of the liquid suction core mounting grooves (6), and the battery pack mounting groove (8) is positioned between the two liquid suction core mounting grooves (6);
the left condensation air cavity (1) and the right condensation air cavity (3) are respectively provided with a condensation cavity (10) communicated with the liquid suction core mounting groove (6), and the battery partition plate (4) is provided with a battery pack mounting groove baffle (7) for separating the battery pack mounting groove (8) from the condensation cavity (10);
the upper cover (2) comprises an upper cover bottom plate (21) which is arranged between the left condensation air cavity (1) and the right condensation air cavity (3) and is positioned above the battery partition plate (4), and two upper cover side plates (22) which are respectively arranged at the front side and the rear side of the upper cover bottom plate (21) and are connected with the battery partition plate (4); a heat dissipation cavity (9) communicated with the left condensation air cavity (1), the right condensation air cavity (3) and the liquid suction core mounting groove (6) is formed between the two upper cover side plates (22) and the upper cover bottom plate (21);
a plurality of upper cover partition plates (23) which are connected with the upper cover bottom plate (21) are arranged on the two upper cover side plates (22) at intervals, and the length of each upper cover partition plate (23) is smaller than the distance between the two upper cover side plates (22);
the battery bottom plate (5) is provided with a secondary battery pack mounting groove (11), and the battery bottom plate (5) is detachably mounted on the lower side of the battery separator (4).
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| CN201710452813.8A CN107221727B (en) | 2017-06-15 | 2017-06-15 | All-weather electric automobile's lithium ion battery phase transition heat radiation structure |
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| CN201710452813.8A CN107221727B (en) | 2017-06-15 | 2017-06-15 | All-weather electric automobile's lithium ion battery phase transition heat radiation structure |
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| CN107221727B true CN107221727B (en) | 2023-04-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109449334B (en) * | 2018-10-31 | 2024-02-27 | 华南理工大学 | Battery thermal management device based on three-dimensional temperature equalization plate |
| CN112140910A (en) * | 2020-09-29 | 2020-12-29 | 东风汽车集团有限公司 | Battery pack with liquid storage, liquid discharge and liquid level monitoring functions |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105428569A (en) * | 2015-12-29 | 2016-03-23 | 苏州科纽普新能源科技有限公司 | Rapid-heat radiation battery pack apparatus with water-cooled support |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4308515B2 (en) * | 2002-12-27 | 2009-08-05 | パナソニック株式会社 | Battery module |
| CN102163757A (en) * | 2010-02-23 | 2011-08-24 | 通用汽车环球科技运作有限责任公司 | Combination of heat pipe and louvered fins for air-cooling of li-ion battery cell and pack |
| CN103199316B (en) * | 2013-04-19 | 2015-12-02 | 安科智慧城市技术（中国）有限公司 | Battery pack and radiator structure thereof |
| CN103682517A (en) * | 2013-12-20 | 2014-03-26 | 华南理工大学 | Combined heat dissipation device of power battery pack |
| CN203766543U (en) * | 2014-03-25 | 2014-08-13 | 东风汽车公司 | Power battery heating system for increasing electric vehicle low temperature cruising distance |
| CN106793685A (en) * | 2016-12-09 | 2017-05-31 | 淳铭散热科技股份有限公司 | A kind of composite heat dissipation device |
| CN106784441A (en) * | 2017-01-11 | 2017-05-31 | 长沙理工大学 | It is a kind of for the radiating case lid of electric automobile battery box and its application |
| CN207368161U (en) * | 2017-06-15 | 2018-05-15 | 成都动力核芯科技有限公司 | A kind of lithium ion battery phase change radiator structure of round-the-clock electric automobile |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105428569A (en) * | 2015-12-29 | 2016-03-23 | 苏州科纽普新能源科技有限公司 | Rapid-heat radiation battery pack apparatus with water-cooled support |
Non-Patent Citations (1)
| Title |
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| 曾健 ; 陆龙生 ; 陈维 ; 何浩 ; .基于热管技术的锂离子动力电池散热系统.化工进展.2015,(第01期),全文. * |
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