CN108428927A - Power battery, power battery temperature control method and new energy vehicle - Google Patents
Power battery, power battery temperature control method and new energy vehicle Download PDFInfo
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- CN108428927A CN108428927A CN201810205220.6A CN201810205220A CN108428927A CN 108428927 A CN108428927 A CN 108428927A CN 201810205220 A CN201810205220 A CN 201810205220A CN 108428927 A CN108428927 A CN 108428927A
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- heat conduction
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- power battery
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring 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
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- 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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of power battery, power battery temperature control method and new energy vehicles.For solving the problems, such as that existing power battery temperature control is bad.The power battery includes shell, battery core, flexible heat conduction item and fingerboard tool, it is filled in gap I between battery core and battery core and in the gap II between battery core and battery case inner wall the flexible heat conduction item being arranged in pairs, the gap location between flexible heat conduction item is inserted into fingerboard tool and to contact at face between the two；Flexible heat conduction item includes flexible Heat Conduction Material, copper pipe, heating wire and temperature sensor, and flexible heat conduction both ends extend respectively on the outside of battery case, and connect heat conduction fluid circulation and electric-control system.The power battery of this kind of structure has excellent temperature control effect, the multi-efficiency to battery core heat preservation, heating and cooling may be implemented, so that battery core is in best operating temperature range always, the temperature difference between each battery core in battery pack can be controlled within ± 3 DEG C.
Description
Technical field
The invention is related to the power battery technology field of one of new-energy automobile core technology.
Background technology
The quality of power source of the power battery as new-energy automobile, temperature control system directly affects in automobile continuation of the journey
Journey.By taking 18650 cylindrical lithium battery cells as an example, thousands of pieces of battery core, each charge and discharge are integrated in each electric automobile
In the process, a large amount of heat is will produce along with charge and discharge inside battery core, sharply increasing for battery temperature, temperature control system is caused to be
Control battery core is at the important means worked normally within the scope of set temperature, so, temperature control system has played most important
Effect.
There are mainly two types of the radiating modes of current power battery：Wind-cooling heat dissipating and water-cooling, wherein water-cooling are simultaneously
It is non-be use pure water, but use with antifreeze and anti-gasification conductive fluid (tesla use be water and ethylene glycol mixing
Object).In two kinds of radiating modes, water-cooling temperature control effect is far superior to wind-cooling heat dissipating, likewise, water-cooling is for leakproofness
Energy, assembling capacity can require also higher.
The thermal design of power battery has risen to a special subject, thousands of in power battery for solving and balancing
The heat accumulation problem of piece battery core.
Unlike other heat sink mechanisms, in the thermal design of power battery, generally require to consider between each battery core
The temperature difference, balance, consider it is extremely cold and very hot in the case of battery core validity, consider battery core between self-expanding space and buffering sky
Between etc., therefore, in power battery design, heat transmission medium and route how is selected, not only to consider its thermal heat transfer capability, also
Take into account technique, attended operation, excellent cost performance, the assembling capacity etc. in production.
By high-end electric vehicle --- for tesla's electric vehicle, the aluminum pipe radiating mode used, principle is to lead to
It crosses and is inserted into flat mouth aluminum pipe between battery core, the heat generated to lithium cell by the conductive fluid flowed in flat mouth aluminum pipe is handed over
It changing, transports, realize temperature control, flat mouth aluminum pipe is intensity height a little, the disadvantage is that, the flexibility that flat mouth aluminum pipe intensity height is brought is low, no
Can carry out face with cylinder lithium cell contact, but be contacted into line, this way of contact make flat mouth aluminum pipe and battery core surface it
Between heat exchange effect it is poor.
But temperature control is not only simple cooling, it is also necessary to by battery core temperature be maintained at rational temperature range it
It is interior, that is to say, that be in most cases the temperature consistency how realized between each battery core of internal battery pack, this be because
It is different by the heat consumption rate (heat that often electric energy of generation 1kWh consumes) of battery at different temperatures, if battery core
It is run in the heat such as adiabatic or high temperature transmits insufficient internal environment, battery core temperature will significantly rise, so as to cause electricity
Pond group central interior forms " hot spot ", and the consistency of battery core once goes wrong, the service life of entire battery pack will be will produce
Prodigious influence may finally lead to thermal runaway.
Invention content
In order to solve the deficiencies in the prior art, a kind of power battery of present invention offer and new energy vehicle, for solving power
Battery temperature control effect is bad, and the temperature of battery core in the operating condition how to be kept to cause sex chromosome mosaicism, and provides a kind of use
The new energy vehicle of the power battery.
The technical solution adopted by the present invention to solve the technical problems is：
Power battery, including shell, battery core, flexible heat conduction item and fingerboard tool, the battery core Cheng Jing, latitude direction matrix cloth
It sets, which is characterized in that in the gap I between battery core and battery core and in the gap II between battery core and battery case inner wall
Filled with the flexible heat conduction item being arranged in pairs, two continuous long strip type flexibility heat conduction items are opposite and put, soft what is be arranged in pairs
Property heat conduction item between gap location be inserted into fingerboard tool so that it is described flexibility heat conduction item and adjacent battery core between forming face connect
It touches；
The flexibility heat conduction item includes flexible Heat Conduction Material, copper pipe, heating wire and temperature sensor, the copper pipe, electric heating
Silk and temperature sensor are integrated in flexible Heat Conduction Material, and copper pipe trend is consistent with the flexible length direction of heat conduction item；
The flexibility heat conduction both ends extend respectively on the outside of battery case.
The copper pipe is that wall thickness is 0.1 millimeterCopper pipe or flat copper pipe.
The thickness of the flexibility heat conduction item has a compressibility between 3 millimeters to 5 millimeters, highly with the height of battery core
Quite.
The flexibility Heat Conduction Material is heat conductive insulating elastic rubber.
The shell of the power battery pack be heat preservation, heat insulation inorganic foamed material.
New energy vehicle is provided with power electric and power battery cooling system, power battery heat dissipation system in the new energy vehicle
System includes control module, heat exchanger, circulating pump, air-conditioning condenser and cockpit air cooler, which is characterized in that power battery, packet
Include shell, battery core, flexible heat conduction item and fingerboard tool, the battery core Cheng Jing, latitude direction matrix arrangement, which is characterized in that in electricity
It is soft filled with being arranged in pairs in gap II in gap I between core and battery core and between battery core and battery case inner wall
Property heat conduction item, two continuous long strip type flexibility heat conduction items are opposite and put, the gap between the flexible heat conduction item being arranged in pairs
Place is inserted into fingerboard tool so that forming face contacts between the flexibility heat conduction item and adjacent battery core；
The flexibility heat conduction item includes flexible Heat Conduction Material, copper pipe, heating wire and temperature sensor, the copper pipe, electric heating
Silk and temperature sensor are integrated in flexible Heat Conduction Material, and copper pipe trend is consistent with the flexible length direction of heat conduction item；
The heating wire is electrically connected with control module and is used for the heating of power battery；
The temperature sensor is electrically connected with control module and is used to monitor internal temperature of power battery；
For several copper pipes by being connect with circulating pump after bundle pipes boundling, circulating pump is separately connected heat exchange by three-way pipe
Device and battery radiator simultaneously form heat exchange loop and air-cooled circuit, the air-conditioning condenser of the heat exchanger and electric vehicle and drive
Sail cabin air cooler connection.
The lower end of each fingerboard is inserted as flat in the fingerboard tool.
The shell of the power battery pack be heat preservation, heat insulation expanded material.
Power battery temperature control method, electrokinetic cell system include such as lower structure：Control module, temperature sensor, power electric
Chi Bao, heat exchanger, heating wire, circulating pump I, circulating pump II, battery radiator, air-conditioning condenser and cockpit air cooler, wherein
The battery core Cheng Jing, latitude direction matrix arrangement, in the gap I between battery core and battery core and battery core and battery case inner wall
Between gap II in filled with the flexible heat conduction item that is arranged in pairs, be embedded with copper pipe, heating wire and temperature in the flexibility heat conduction item
Sensor is spent, the copper pipe is connect by bundle pipes with circulating pump I, and circulating pump I is separately connected heat exchanger and electricity by three-way pipe
Pond radiator, the heat exchanger about with the air-conditioning condenser of electric vehicle or cockpit air cooler by connecting, the electric heating
Silk is electrically connected with control module and is used for the heating of power battery pack；The temperature sensor is electrically connected and is used for control module
Monitor power battery pack internal temperature；It is characterized in that, temperature control method is as follows：
A, when internal temperature of power battery is higher than set temperature section：I cycle operation of circulating pump, passes through copper Bottomhole pressure
Conductive fluid give battery core cooling；And
Ambient temperature be not higher than 30 degrees Celsius when, by electric vehicle carry battery radiator or cockpit air cooler into
Row cooling；
When ambient temperature is higher than 30 degrees Celsius, circulating pump II starts, and by the included air-conditioning condenser of electric vehicle or drives
Sail cabin air cooler heat dissipation；
B, when internal temperature of power battery is less than set temperature section：Circulating pump I does not work, at the conductive fluid in copper pipe
In stationary state, meanwhile, heating wire is powered, and is heated up to power battery pack inside by electrothermal wire heating, when in battery pack
After portion's temperature rise to predetermined temperature, heating wire stops heating.
The beneficial effects of the invention are as follows：
1, the power battery of this kind of structure has excellent temperature control effect, especially can be achieved on to battery core heat preservation, heating
With the multi-efficiency of cooling so that battery core is in best operating temperature range always, especially can will be each in battery pack
Temperature difference between battery core controls within ± 3 DEG C.
2, flexible heat conduction item itself has flexible, buffering, the performance of damping, can be in internal battery pack between adjacent
Battery core forms protection, and cooperation foaming shell has better shock resistance.
3, the buffer action of fingerboard so that be maintained at appropriate distance between battery core, especially, prevent it is adjacent between electricity
Core occurs squeezing phenomenon.And so that forming cambered surface between battery core and flexible heat conduction item contacts, and increases contact area, can improve
Heat exchanger effectiveness.
4, the presence of fingerboard so that flexible heat conduction item forms local pressure, the presence of pressure at the contact surface of battery core
Heat exchanger effectiveness between the two can be improved.The cost of flexible heat conduction item is relatively low, convenient in the popularization of electric vehicle industry and profit
With.
5, temperature control controllability is good, and after a key assignments reasonably monitor temperature, which can monitor, run automatically,
And it is maintained at rational temperature range.
6, flexible heat conduction strip material itself is made of fire retardant flexible Heat Conduction Material and non-ignitable copper pipe material, because of it
With the excellent in performance such as good wear-resisting, electric insulation, high compression amount and good corrosion resistance, heat conductivility, while can be with
It solves the problems, such as the damping of battery core, insulation, anti-puncture, make up the related applications such as build-up tolerance.
Description of the drawings
Fig. 1 is internal battery pack schematic diagram.
Fig. 2 is partial enlarged view at A in Fig. 1.
Fig. 3 is the assembling relationship figure of flexible heat conduction item and fingerboard.
Fig. 4 is the scheme of installation of battery core and shell.
Fig. 5 is temperature control system schematic diagram one.
Fig. 6 is temperature control system schematic diagram two.
Fig. 7 is flexible heat conduction cross-section diagram.
Fig. 8 is the assembly relation between thermal conductive metal pipe and battery core in the prior art.
In figure：00 battery core,
10 metal thermal conductive materials,
20 flexible heat conduction items, 21 flexible Heat Conduction Materials, 22 copper pipes, 23 heating wire,
30 fingerboard tools, 31 fingerboards, 32 is flat,
40 shells.
Specific implementation mode
18650 be lithium ion battery (hereinafter referred to as battery core) be a kind of lithium ion battery model of standard, wherein 18 tables
Show a diameter of 18mm, 65 indicate that length is 65mm, and 0 is expressed as cylindrical battery.18650 common batteries are divided into lithium-ion electric
Pond, ferric phosphate lithium cell.Lithium ion battery voltage is 3.6V and 4.2V, and ferric phosphate lithium cell voltage is 3.2V, and capacity is usually
1200mAh-3000mAh, common capacity are 2200mAh-3600mAh.
The present embodiment is what model was implemented based on this battery core 00.
In prior art handbook, heat conductivility is preferably metal material, therefore metal material is usually utilized to conduct
Heat Conduction Material, using copper pipe, aluminum pipe and stainless steel tube as representative.
In the thermal design of power battery, it should avoid using conductive metal thermal conductive material, metal thermal conductive material makes
With being easy in the process, initiation battery core is short-circuit.Even with metal heat-conducting, it is also desirable to carry out insulation processing to it.With reference to existing skill
Art, after above-mentioned insulation processing, still without generating preferable mild temperature control effect.With reference to figure 8, insulating layer is carried
Metal thermal conductive material 10 be clamped in the space between two rows of battery cores, since metal thermal conductive material 10 (be usually tubulose) is
Rigidity, it is flexible poor, so phenomena such as being difficult to complete to fold, so, it is that line connects between metal thermal conductive material 10 and battery core 00
Touch L, that is to say, that there is no forming cambered surface to contact between metal thermal conductive material and battery core 00, contact area is small to be led to the problem of
It is to cause thermal conduction effect bad, that is to say, that cannot in time, effectively complete the heat between battery core and metal thermal conductive material
Amount is transmitted, and temperature control effect improves a little.This technology has application in the power battery of tesla's electric vehicle at present.
The present invention is solved the problem above-mentioned with the combination of flexible Heat Conduction Material 21 and copper pipe 22.
Explanation of nouns：The characteristics of flexible Heat Conduction Material substantially silicon rubber and blown rubber used at present, silicon rubber
It is that elasticity is good, the characteristics of blown rubber is that deformation range is big, good heat conduction effect, stress levels higher.
Copper pipe 22, generally use wall thickness are 0.1 millimeterCopper pipe or similar flat copper pipe.In some cases,
The replacement under equal conditions can be also carried out to copper pipe with alloy thin-walls pipes such as equality strength, stainless steel tubes flexible, there is class
As heat transfer effect.
The moulding process scheme 1 of flexible Heat Conduction Material and copper pipe is manufactured using integrated molding, by flexible heat conduction raw material and
Copper pipe one extrusion molding, it is molding after flexible heat conduction item 20 thickness at 3 millimeters to 5 millimeters or so, have compressibility,
Height is suitable with the height of battery core, has had enough cladding areas.Thin copper pipe is embedded in inside, copper pipe trend and flexible heat conduction
Item trend is consistent, and this structure design is convenient for large-scale extrusion molding, especially mold extrusion molding.Flexible heat conduction item breaks
Face is designed as rectangle, and thin copper pipe is alongst buried.
The application method of the flexibility heat conduction item in power battery：Prepare two continuous long strip type flexibility heat conduction items 20,
Two flexible heat conduction items are opposite and put, and are tucked into the gap I between battery core and lithium cell with reference to figure 3, and from side, Huo Zhe electricity
In gap II between core and battery frame inner walls, in general, two kinds of gaps are all lateral arrangements or longitudinally arranged, also
It is to say, with reference in figure 3, continuous flexibility heat conduction item is to carry out U-shaped detour along rows of battery core inside housing of power cell
Arrangement.Then in the present embodiment, the arrangement of multiple U-shapeds forms the S-shaped arrangement of three bouts, then, flexible heat conduction item two
End extends respectively to battery frame hull outside.Above-mentioned battery core at direction of warp and weft matrix arrangements, four adjacent battery cores it
Between be a near-rhombic cylindrical space, that is to say, that at the space between four battery cores, there is no quilts for flexible heat conduction item
It clamps, the state in relaxation.At the cylindrical space, by using fingerboard tool 30 be tucked into two flexible heat conduction items it
Between so that two flexible heat conduction items are fitted in, to prevent from puncturing flexible heat conduction item, by the lower end insertion end design of each fingerboard 31
It is non-pointed flat 32.Fingerboard is made of fire retardant or non-ignitable bakelite material, can be hollow structure.It can also adopt
It is substituted with the aluminum pipe that section is diamond shape, based on light material.
After filling in fingerboard 31 at gap, under the action of fingerboard, between flexible 20 meeting of heat conduction item and adjacent battery core 00
Forming face contacts S, and by taking a battery core as an example, usual face contact S is bonded from battery core both sides respectively, forms sufficiently large contact surface
Product, it is ensured that there is sufficient heat exchange path, with reference to figure 2, and flexible heat conduction item has between flexible heat conduction item and battery core
More deformability can be filled in gap, and realization is filled up completely, and contact surface is not less than 45 in each quadrant area
Degree, that is to say, that between flexible heat conduction item and battery core adequately contact, effectively improved heat-exchange capacity.And in fingerboard
Under the action of, between flexible heat conduction item and battery core be bonded even closer, that is to say, that improve the flexibility at conformable region and lead
The local density of hot item, effectively improves heat-exchange capacity.
By the above-mentioned means, realize between flexible heat conduction item 20 and battery core 00 it is abundant, fit closely and contact.Flexible heat conduction
Large area is contacted with battery core, be convenient between battery core quickly, complete heat exchange.
After the completion, after the copper pipe 22 at flexible heat conduction both ends is using bundle pipes confluence, it is connected to heat conduction fluid circulation, profit
The temperature on battery core surface is adjusted with the cycle of conductive fluid.
In the present embodiment, 00 point of group of battery core in battery pack is arranged, and reaches best temperature control effect.
In use, best occupation mode：Two flexible heat conduction items 20 are respectively from opposite direction connection conductive fluid cycle
Feed end, that is to say, that the conductive fluid loop direction in two flexible heat conduction items is opposite, in this manner it is ensured that flexibility is led
The temperature of conductive fluid in hot item is almost the same, ensures that the conductive fluid inside each group of battery pack is in almost the same temperature
Degree, then coordinate the circulating pressure of the circulating pump of conductive fluid so that the temperature of each battery core monomer surface is at ± 3 degree in battery pack
Within.
It is alternatively molded scheme 2, manufactured using integrated molding, by flexible Heat Conduction Material 21,23 and of heating wire
The integrated extrusion molding of copper pipe 22, it is molding after flexible heat conduction item 20 thickness at 3 millimeters to 5 millimeters or so, have compressible
Property, highly suitable with the height of battery core, heating wire and thin copper pipe are embedded in inside, heating wire, copper pipe trend and flexible heat conduction item
Trend is consistent, the composite construction of copper pipe, heating wire and flexible Heat Conduction Material is formed, in use, heating wire 23 is intervened standby electricity
Source system can be heated after energization by temperature control system to internal battery pack, with reference to figure 7.This function is usually in extremely cold area
It uses, the internal temperature of power battery for solving extremely cold area is low, charge and discharge problem.
Further in scheme, it is integrated with temperature sensor in flexible Heat Conduction Material, for monitoring power electric in real time
Environment temperature inside pond.Certainly, temperature sensor can also be fitted in battery core surface.
In Figure 5, a kind of power battery temperature control system, including such as lower structure：Control module, temperature sensor, power electric
Pond, heat exchanger, auxiliary electrical heater element (referring generally to heating wire), circulating pump (including pump I and pump II), battery radiator, air-conditioning
Condenser and cockpit air cooler.Wherein, it is integrated with above-mentioned flexible heat conduction item in power battery pack, it is embedding in flexible heat conduction item 20
There are copper pipe, heating wire and temperature sensor, there is higher integrated level, convenient for the installation of flexible heat conduction item, wherein heating wire is
A kind of common auxiliary electrical heater element.Above-mentioned copper pipe is connect by bundle pipes with pump I, and circulating pump I is distinguished by three-way pipe
Heat exchanger and battery radiator are connected, heat exchange loop and air-cooled circuit are respectively formed, wherein battery radiator is dissipated using air-cooled
Heat.Heat exchanger is connected by air-conditioning condenser about pipeline and electric vehicle and cockpit air cooler, passes through air-conditioning condenser
With cockpit air cooler cooling is provided to heat exchanger.Sensor is arranged inside power battery, especially between battery core gap
Position is fitted in battery core surface, the temperature for acquiring internal battery pack, and feeds back to circulating pump.Circulating pump uses frequency conversion
Pump.
It is learnt through inquiring 18650 lithium cell operation instructions：The operating temperature of lithium cell monomer：- 20 DEG C~+50 DEG C, most
Good operating temperature is+20 DEG C~+40 DEG C, therefore this system monitoring temperature is set as 30 ± 3 degrees Celsius by the present invention,
When internal temperature of power battery is higher than set temperature section：I cycle operation of circulating pump, passes through copper Bottomhole pressure
Conductive fluid cools down to battery core 00；Until after being reduced to set temperature section, circulating pump I is stopped.In ambient temperatures such as spring and autumn
(being often referred to air themperature) be not higher than 30 degrees Celsius when, by electric vehicle carry battery radiator or cockpit air cooler into
Row cooling, when the ambient temperatures such as summer are higher than 30 degrees Celsius, the work of II synchronous averaging of circulating pump is carried by electric vehicle
Air-conditioning condenser or cockpit air cooler radiate, and in three kinds of heat dissipation effects, the strong cooling-down effect of air-conditioning condenser is most apparent, and
Most consumption electric energy, therefore, air-conditioning condenser is only opened under the weather of extreme heat, to save electric energy.
When internal temperature of power battery is less than set temperature section：Circulating pump I does not work, that is to say, that in copper pipe
Conductive fluid remains static, and macroscopically, battery pack internal temperature is in keeping warm mode, meanwhile, 23 power switch of heating wire
It connects, is generated heat by heating wire 23, heated up to power battery pack inside, when battery pack internal temperature rises to predetermined temperature
Afterwards, heating wire stops heating, and battery pack internal temperature is too low during solving the problems, such as extremely frigid zones vehicle launch.Skill of the present invention
In art, heating wire is evenly arranged in inside flexible Heat Conduction Material, has the advantage that fever is rapid, uniformity is good, in general,
In subzero 30 degree of environment, it is only necessary to the temperature inside battery pack can be heated within the scope of best effort within 1 to 2 minutes.
The technology of the present invention carries out temperature control using conductive fluid technology, and shell can make the structure with heat preservation, heat insulation,
Porous material of the material selection with buffering, heat insulation, for example, the polyphenyl of modified polyurethane foam material master or modification
Ethylene expanded material, expanded material have the characteristics that lightweight relative to traditional metal shell, more composite electric automobile
Light-weighted design requirement.
When internal temperature of power battery falls into setting stable region：Heating wire is stopped, inside battery pack
The porosity characteristic of enclosed environment and flexible heat conduction item itself, and the shell with heat insulation realize heat preservation.Under normal conditions,
With running car a distance or time, battery core itself, which can radiate, heat and to add up, and the heating of battery core is realized, at this point, simultaneously
According to the heat condition (obtaining data by Sensor monitoring) of battery core, I intelligent opening of circulating pump realizes battery pack internal temperature
Regulation and control.
Fig. 6 relative to Fig. 5 difference lies in, in Fig. 6, it is adjacent between flexible heat conduction item in conductive fluid flow direction
Identical, in Fig. 5, it is adjacent between flexible heat conduction item in the flow direction of conductive fluid be opposite.
The application of flexible heat conduction item 20 can carry out the gap inside battery pack fully, reasonably to utilize, and substantially not
The useful space inside battery pack is occupied, high integration, the energy density of power battery can be improved, and provide extra small, super
Thin battery packet.The flexibility heat conduction item can form the multiple efficacies such as buffering, heat preservation, heat conduction between battery core simultaneously, be conducive to electricity
The safety of core, and the flexible heat conduction item itself in the present invention has the characteristic of fire retardant insulation, improves the reliable of power battery
Property.
Advantage：The flexible heat conduction item 20 used in the present invention itself has thicker thickness, is filled between two rows of battery cores
Gap in, cooperation fingerboard 30 can be deformed, during deformation, internal copper pipe synchronize flexural deformation, can fill
Gap and increase and the contact surface of battery core connect, and as many as the decades of times that area increased is original structure, complete battery core surface heat
Position comes into full contact with flexible heat conduction item, and flexible heat conduction item can be transferred again to internal copper pipe 22 after absorbing heat, into
And passed heat by the conductive fluid in copper pipe, if circulating pump I is not turned on, coordinate the power battery involucrum of porous material
Good heat preservation then may be implemented in body.Because having many micropores, heat storing and heat preserving ability number stronger than air inside flexible heat conduction item
Times.Meanwhile the flexible heat conduction item of porous structure can also play the effects that damping, insulation, sealing, be filled between battery core, be formed
Enough cushioning effects.
The use of this flexibility heat conduction item meets power battery miniaturization, ultrathin, highly integrated design requirement.
The flexible heat conduction technology used in the present invention includes but not limited to following Heat Conduction Material：
A grades of flexible Heat Conduction Materials, including following parts by weight：
100 parts of vinyl silicone oil
10 parts of containing hydrogen silicone oil (crosslinking agent)
0.1 part of hydrogen platinic acid (catalyst)
300 parts of aluminium nitride (Heat Conduction Material)
10 parts of silicones
50 parts of mountain flour
Flexible Heat Conduction Material can also use the prior art, such as heat conductive insulating elastic rubber, heat conductive insulating elastic rubber
Using silicon rubber base material, the ceramic particles such as boron nitride, aluminium oxide are filler, and heat-conducting effect is very good.Under equal conditions, thermal resistance
It is anti-to be less than other Heat Conduction Materials.
The preparation process of above-mentioned A grades flexible Heat Conduction Material：
(1) mixing and curing, under 130 degrees Celsius of temperature condition, by said components be added in de-airing mixer into
Row is sufficiently mixed, spare.
(2) said mixture is squeezed out to molding die using extruder, said mixture, copper pipe and heating wire are in mold
According to the orientation of setting be compounded to form flexible heat conduction item, and be delivered to progress high temperature drying and shaping in infrared oven.
In step 2, can selective implantation temperature sensing patch as needed, for perceiving in flexible Heat Conduction Material
The problem of portion.
A kind of samming shell 40 with anti seismic efficiency, the guard shield for substituting existing metal material, the samming
Shell includes following technical essential：
Shell 40, shell uses sheet metal shell, for example, by using 0.5 millimeter of stainless sheet steel entirety punch forming,
Can enclosure interior be inorganic foamed material, which is directly molded inside housings by mold, according to battery core
Arrangement require carry out mold design.
Inorganic foamed material itself has non-ignitable A grade fire performances, disclosure satisfy that non-ignitable power battery, buffering and lightweight
Requirement.
The above-described embodiments are merely illustrative of preferred embodiments of the present invention, not to the model of the present invention
It encloses and is defined, under the premise of not departing from design spirit of the present invention, various changes of the relevant technical staff in the field to the present invention
Shape and improvement should all expand in the protection domain as determined by claims of the present invention.
Claims (10)
1. power battery, including shell, battery core, flexible heat conduction item and fingerboard tool, the battery core Cheng Jing, latitude direction matrix cloth
It sets, which is characterized in that in the gap I between battery core and battery core and in the gap II between battery core and battery case inner wall
Gap location filled with the flexible heat conduction item being arranged in pairs, and between the flexible heat conduction item being arranged in pairs is inserted into fingerboard tool,
The fingerboard tool struts and so that forming face contacts between the flexible heat conduction item and adjacent battery core；
The flexibility heat conduction item includes flexible Heat Conduction Material, and be integrated in the flexibility Heat Conduction Material copper pipe, heating wire and
Temperature sensor, and copper pipe trend is consistent with the flexible length direction of heat conduction item；
The flexibility heat conduction both ends extend respectively on the outside of battery case.
2. power battery according to claim 1, which is characterized in that the copper pipe is that wall thickness is 0.1 millimeterCopper pipe
Or flat copper pipe.
3. power battery according to claim 1, which is characterized in that the thickness of the flexibility heat conduction item is at 3 millimeters to 5 millis
Between rice, there is compressibility, it is highly suitable with the height of battery core.
4. power battery according to claim 1, which is characterized in that the flexibility Heat Conduction Material is silicon rubber and foaming rubber
Glue.
5. power battery according to claim 1, which is characterized in that the shell of the power battery pack is inorganic foamed material
Material.
6. new energy vehicle, it is provided with power electric and power battery cooling system in the new energy vehicle, the power battery cooling system
Including control module, heat exchanger, circulating pump, air-conditioning condenser and cockpit air cooler, which is characterized in that the power battery pack
Include shell, battery core, flexible heat conduction item and fingerboard tool, the battery core Cheng Jing, latitude direction matrix arrangement, between battery core and battery core
Gap I in and the gap II between battery core and battery case inner wall in filled with the flexible heat conduction item that is arranged in pairs, at
Gap location between the flexible heat conduction item of setting is inserted into fingerboard tool so that between the flexibility heat conduction item and adjacent battery core
Forming face contacts；
The flexibility heat conduction item includes flexible Heat Conduction Material, and be integrated in the flexibility Heat Conduction Material copper pipe, heating wire and
Temperature sensor, and copper pipe trend is consistent with the flexible length direction of heat conduction item；
The heating wire is electrically connected with control module and is used for the heating of power battery；
The temperature sensor is electrically connected with control module and is used to monitor internal temperature of power battery；
Several copper pipes by being connect with circulating pump after bundle pipes boundling, circulating pump by three-way pipe be separately connected heat exchanger and
Battery radiator simultaneously forms heat exchange loop and air-cooled circuit, the air-conditioning condenser and cockpit of the heat exchanger and electric vehicle
Air cooler connects.
7. new energy vehicle according to claim 6, which is characterized in that the lower end of each fingerboard is inserted as in the fingerboard tool
It is flat.
8. new energy vehicle according to claim 6, which is characterized in that the shell of the power battery pack is expanded material.
9. power battery temperature control method, power battery temperature control system include：Control module, temperature sensor, power battery, heat exchange
Device, heating wire, circulating pump I, circulating pump II, battery radiator, air-conditioning condenser and cockpit air cooler, wherein the battery core
Cheng Jing, latitude direction matrix arrangement, in the gap I between battery core and battery core and the seam between battery core and battery case inner wall
It is filled with the flexible heat conduction item being arranged in pairs in gap II, copper pipe, heating wire and temperature sensor are embedded in the flexibility heat conduction item,
The copper pipe is connect by bundle pipes with circulating pump I, and circulating pump I is separately connected heat exchanger and battery radiator by three-way pipe,
The air-conditioning condenser and cockpit air cooler of the heat exchanger and electric vehicle connect, and the heating wire is electrically connected with control module
And for the heating of power battery；The temperature sensor is electrically connected with control module and is used to monitor temperature inside power battery
Degree；It is characterized in that, temperature control method is as follows：
A, when monitoring temperature of the internal temperature of power battery higher than setting：I cycle operation of circulating pump, passes through copper Bottomhole pressure
Conductive fluid cools down to battery core；And
When ambient temperature is not higher than 30 degrees Celsius, the battery radiator or cockpit air cooler that are carried by electric vehicle are dropped
Temperature；
When ambient temperature is higher than 30 degrees Celsius, circulating pump II starts, the air-conditioning condenser or cockpit carried by electric vehicle
Air cooler radiates；
B, when monitoring temperature of the internal temperature of power battery less than setting：Circulating pump I does not work, and the conductive fluid in copper pipe is in
Stationary state, meanwhile, heating wire is powered, and is heated up to power battery pack inside by electrothermal wire heating, inside battery pack
After temperature rise to predetermined temperature, heating wire stops heating.
10. power battery temperature control method according to claim 9, which is characterized in that the monitoring temperature is set as 30 ± 3
Degree Celsius.
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| CN113261155A (en) * | 2018-12-27 | 2021-08-13 | 赛昂能源有限公司 | Electrochemical devices and related articles, components, configurations, and methods |
| CN113624043A (en) * | 2021-08-06 | 2021-11-09 | 合肥工业大学 | Temperature-equalizing distributed parallel micro-flow-channel heat exchanger and application thereof |
| WO2023071056A1 (en) * | 2021-10-29 | 2023-05-04 | 宁德时代新能源科技股份有限公司 | Heating apparatus, battery and electric apparatus |
| US11728528B2 (en) | 2018-12-27 | 2023-08-15 | Sion Power Corporation | Isolatable electrodes and associated articles and methods |
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