CN105742753A - Thermal management method and device for battery pack - Google Patents
Thermal management method and device for battery pack Download PDFInfo
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- CN105742753A CN105742753A CN201610144883.2A CN201610144883A CN105742753A CN 105742753 A CN105742753 A CN 105742753A CN 201610144883 A CN201610144883 A CN 201610144883A CN 105742753 A CN105742753 A CN 105742753A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6552—Closed pipes transferring heat by thermal conductivity or phase transition, e.g. heat pipes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
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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
- H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
- H01M10/663—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
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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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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a thermal management technology for power batteries, and belongs to the field of power batteries. A thermal management method for a battery pack is characterized in that a heat-conducting sleeve coating one battery is arranged outside one battery cell of the battery pack; each heat-conducting sleeve is connected with a heat-conducting pipe with a heat transfer function; and heat exchange is achieved for the batteries of the battery pack through heat transmission of the heat-conducting pipe. A device for thermal management employing the thermal management method for the battery pack is characterized by comprising the heat-conducting pipes and the heat-conducting sleeves, wherein each heat-conducting sleeve is fixedly connected with the corresponding heat-conducting pipe; each heat-conducting sleeve coats the outside of each battery cell of the battery pack; the internal sizes of the heat-conducting sleeves are matched with the external sizes of the batteries; the outer side of each heat-conducting sleeve is fixedly connected to the corresponding heat-conducting pipe; the heat-conducting pipes transmit the heat generated by the batteries through heat transmission; and heat exchange is achieved for the batteries of the battery pack. According to the thermal management method and device, the temperature adjusting effect is improved; the mechanical properties of the batteries and the thermal management device are strengthened; and the device is portable and easy to assemble.
Description
Technical field
The present invention relates to automobile power cell thermal management technology field, particularly relate to a kind of battery bag thermal management algorithm and device.
Background technology
Electrokinetic cell such as lithium ion battery energy density is high, and volume is little, and cycle life is longer, and on electric passenger vehicle, commercial vehicle, application potential and market are very big.Raise yet with lithium ion battery temperature in charge and discharge process and affect self performance and cycle life, too high temperature even causes thermal runaway, cause the accident such as spontaneous combustion, blast, conventional lithium cobaltate cathode material battery temperature needs to control within 50 degrees Celsius, to avoid thermal runaway and blast on fire, improve safety.Progress along with battery material and technique, although 60 degrees Celsius can be risen to or higher with the battery operating temperature that LiFePO4 is positive electrode, but along with temperature is further up, battery capacity decay is substantially, at high temperature still can there is thermal runaway and Ignition Phenomena, and battery capacity significantly declines at low temperatures, even cannot start.Therefore power lithium-ion battery thermal management technology research and implement particularly urgent.
The heat management system of electrokinetic cell bag usually takes heat-conducting piece passively to cool down, or adopts the air that forces of cell channel to cool down.Passive cooling or forced air cooling cooling system volume are little, and cost is low, but radiating effect is very limited, and battery temperature lack of homogeneity.And adopt the liquid of heat exchanger and air-conditioning adjustment or air cooling to carry out closed circuit temperature control circulation, and cool down when battery temperature height, be heated when battery temperature is low, there is regulating effect good, the advantage that battery temperature is controlled, be conducive to the heat management of electrokinetic cell.
Chinese patent 201210399617.6 discloses a kind of battery module, including: multiple rectangular cell monomers；And defining the corrugated fin of substantially serpentine shape, described corrugated fin is with straightway alternately and top section so that at least one in described many Battery packs monomer is arranged in the region being limited between adjacent straight line segment of described corrugated fin.This patent belongs to passive cooling, although have certain radiating effect, but electrokinetic cell does not have special fastening mechanism to fin heat transfer, cause that contact gap and thermal contact resistance are bigger, outwards conducting heat and have the bigger temperature difference in center, heat-sinking capability is not enough, is not suitable for motive-power battery.
Chinese patent 201110345442.6 discloses a kind of LED heronsbill radiator, including circular radiating seat and some radiating fins, the cylindrical of circular radiating seat is arranged with radiating fin, it is characterized in that: also include radiating ribs, being connected to radiating ribs between adjacent two radiating fins, described radiating ribs is arc.Described radiating seat is made up of copper product.The radiating fin of this patent is prepared from by extrusion process, technique relative complex, consuming time, and the radiating fin weight prepared is big, bulky, it is impossible to for weight, volume requirement high such as the electrokinetic cell system of automobile etc..
Tesla (CS) Koncern, Podebradska 186, Praha 9, Czechoslovakia, in US Patent No. 8,263,250B2, discloses a kind of liquid cooling manifold structure for battery bag heat management, and the cold pipeline of liquid is fitted battery-arrangements after bending.Double-deck thermal interfacial material is added between cold pipe, for alleviating the collision of cold pipe and battery and reducing thermal resistance.But, in the middle of actual motion, due to assembling unfixing between cold pipe and battery, inevitably result in bigger the air gap, additionally, in the middle of actual motion, frequent impact also can cause the air gap extra between cold pipe and battery, and air is the non-conductor of heat, thus causing bigger interface contact heat resistance, it is unfavorable for heat transmission, causing that battery temperature rise is higher, the temperature difference is bigger.
Summary of the invention
The technical problem to be solved is to provide a kind of battery bag thermal management algorithm and device, solves present heat management device heat-sinking capability not enough, is unfavorable for heat transmission, causes that battery temperature rise is higher, the defect that the temperature difference is bigger.
Technical scheme
A kind of battery bag thermal management algorithm, it is characterized in that: each battery at battery bag is outside equipped with the heat conducting sleeve of parcel battery, described heat conducting sleeve is connected with the heat conduction pipeline with Heat transmission function, by the Heat transmission of heat conduction pipeline, the battery of battery bag is realized heat exchange.
Described heat conduction pipeline adopts both ends open, intermediate flow homoiothermic gas or liquid, is carried out thermal convection current by homoiothermic gas or liquid by heat exchanger/air conditioning system, it is achieved temperature adjustment.
Described heat conduction pipeline adopts the heat pipe of closed at both ends to carry out Heat transmission, it is achieved temperature adjustment.
A kind of apply above-mentioned battery bag thermal management algorithm and carry out the device of heat management, it is characterized in that: include heat conduction pipeline and the heat conducting sleeve affixed with heat conduction pipeline, described heat conducting sleeve is wrapped in outside each battery of battery bag, the inside of heat conducting sleeve and the external dimensions of battery coordinate, it is fixed on heat conduction pipeline outside heat conducting sleeve, the heat that battery produces is conducted by described heat conduction pipeline by Heat transmission, and the battery of battery bag is realized heat exchange.
Described heat conduction pipeline both ends open, centre passes into the fluid regulated through air-conditioning or heat exchanger system, at fluid through heat conduction pipeline and heat conducting sleeve generation heat exchange, the inducer at heat conduction pipeline two ends and outlet section are all connected with collecting pipe, then are connected with air-conditioning or heat exchange manifold.
Or, described heat conduction pipeline adopts the heat pipe structure of closed at both ends, inside is filled with porous core, part is equipped with liquid refrigerant, such as water, acetone, ammonia, pentane, Feron-11, forming high heat-conductive thermo tube structure, evaporator section and the described heat conducting sleeve of heat pipe structure are affixed, condensation segment one end of heat pipe structure extend in the middle of collecting pipe, carries out heat exchange with air-conditioning or heat exchanger fluid.
Further, described heat conduction pipeline is one layer or multilamellar, is distributed along heat conducting sleeve short transverse；Described heat conduction pipeline is single tube or adopts multitube series connection.
Further, described heat conducting sleeve is cylindrical tube shape, is filled with heat conduction bonding material between battery and heat conducting sleeve.
Further, described heat conducting sleeve is the bonding structure shape being partially retained in battery periphery, is connected with heat conduction pipeline through heat conduction support.
Further, carry out local each through heat conduction bonding agent between described heat conducting sleeve, between heat conducting sleeve and heat conduction pipeline and be connected, strengthen mechanical strength, reduce thermal contact resistance.
Beneficial effect
The present invention adopts heat conducting sleeve and the fixing connection heat management device of heat conduction pipeline coupling, eliminates the air gap between battery and heat conduction pipeline, thus greatly reducing interface resistance, reduces battery maximum temperature；Meanwhile, heat conducting sleeve has higher thermal conductivity, and battery plays good thermal diffusion and equal temperature effect, contributes to realizing excellent augmentation of heat transfer effect and battery samming effect；
The present invention adopts the mode that heat conducting sleeve is connected with HVAC fluid collection pipe with heat conduction pipeline, it is capable of good bidirectional temp regulation: when battery temperature is higher, through heat conducting sleeve and heat pipe, heat can be route external fluid from battery to emit, when battery temperature is relatively low, it is possible to utilize heat transport fluid to carry out battery thermal and heating；
The present invention adopts the connected heat management device of heat conducting sleeve and heat conduction pipeline, moreover it is possible to reduces, eliminate because of kinetic collision and sliding between heat conduction pipeline and battery cell, improves system mechanics intensity, simultaneously, also eliminate the air gap, dredge thermally conductive pathways, it is ensured that hot property is steady in a long-term；
The heat conducting sleeve of the present invention and heat conduction pipeline can pre-assembly, then battery is installed, each battery is fixed by heat conducting sleeve, directly installs location, and carries out other operations such as electrode connection etc., easy for installation, compact conformation, light.
Accompanying drawing explanation
Fig. 1 is the schematic top plan view that Tesla (CS) Koncern, Podebradska 186, Praha 9, Czechoslovakia utilizes the cold device carrying out heat management of liquid；
Fig. 2 is apparatus of the present invention schematic top plan view；
Fig. 3 is apparatus of the present invention schematic side view, and wherein heat conduction pipeline is mono-layer tube；
Fig. 4 is apparatus of the present invention schematic side view, and wherein heat conduction pipeline is bimetallic tube；
Fig. 5 is that in apparatus of the present invention, heat conducting sleeve and heat conduction pipeline interlock affixed schematic diagram；
Fig. 6 is the implementation unit schematic diagram that in Fig. 4, heat conducting sleeve and heat conduction pipeline interlock affixed；
Fig. 7 is heat conducting sleeve when being portion envelops battery is interlocked with heat conduction pipeline the fixing schematic diagram being connected by support；
Fig. 8 is the implementation unit schematic diagram that in Fig. 7, heat conducting sleeve interlocks affixed by support and heat conduction pipeline；
Fig. 9 is heat conduction pipeline is the heat management schematic diagram closing heat pipe structure；
Figure 10 is that heat conduction pipeline adopts the another kind closing heat pipe structure cooling to implement schematic diagram.
Figure 11 is that heat conduction pipeline adopts the another kind closing heat pipe structure heating to implement schematic diagram.
Figure 12 is the Computer Simulation temperature cloud picture of the 4x3 set of cells adopting apparatus of the present invention.
Figure 13 is the 4x3 set of cells Computer Simulation temperature cloud picture of present Air Forced Convection cooling.
Wherein: the affixed part of 1-heat conduction pipeline, 2-battery, 3-heat conducting sleeve, 4-heat conducting sleeve and heat conduction pipeline, the collecting pipe of 5-air-conditioning or heat exchanger system, 6-heat pipe structure, 7-fin, 8-room temperature heat pipe, 9-Cryo Heat Tube.
Detailed description of the invention
Below in conjunction with specific embodiments and the drawings, the present invention is expanded on further.
Heat management device heat-sinking capability for solving present electrokinetic cell is not enough, is unfavorable for heat transmission, causes that battery temperature rise is higher, the problem that the temperature difference is bigger, and the present invention proposes a kind of thermal management algorithm adopting heat conducting sleeve and heat conduction pipeline to combine and heat management device.
A kind of battery bag thermal management algorithm, each battery at battery bag is outside equipped with the heat conducting sleeve of parcel battery, and described heat conducting sleeve is connected with the heat conduction pipeline with Heat transmission function, by the thermal convection current of heat conduction pipeline, the battery of battery bag is realized heat exchange.Described heat conduction pipeline can adopt both ends open, intermediate flow homoiothermic gas or liquid, is carried out thermal convection current by homoiothermic gas or liquid by heat exchanger/air conditioning system, it is achieved temperature adjustment.Described heat conduction pipeline can also adopt the heat pipe of closed at both ends to carry out Heat transmission, it is achieved temperature adjustment.
Apply above-mentioned battery bag thermal management algorithm and carry out the device of heat management, including heat conduction pipeline and the heat conducting sleeve affixed with heat conduction pipeline, described heat conducting sleeve is wrapped in outside each battery of battery bag, the inside of heat conducting sleeve and the external dimensions of battery coordinate, it is fixed on heat conduction pipeline outside heat conducting sleeve, the heat that battery produces is conducted by described heat conduction pipeline by thermal convection current, and the battery of battery bag is realized heat exchange.
Described heat conduction pipeline both ends open, the fluid regulated through air-conditioning or heat exchanger system is passed in pipe, it is generally water-ethylene glycol liquid or air, through heat conduction pipeline and heat conducting sleeve generation heat exchange, when battery temperature is higher, heat can be gone out by fluid drainage from battery through heat conducting sleeve and pipeline open channels, when battery temperature is relatively low, the fluid being possible with heat-carrying carries out battery thermal and heating, thus at fluid through heat conduction pipeline and heat conducting sleeve generation heat exchange, inducer and the outlet section at heat conduction pipeline two ends are all connected with collecting pipe, it is connected with air-conditioning or heat exchange manifold again.
Or, described heat conduction pipeline adopts the heat pipe structure of closed at both ends, inside is filled with porous core, part forms high heat-conductive thermo tube structure equipped with liquid refrigerant water or acetone, and evaporator section and the described heat conducting sleeve of heat pipe structure are affixed, and condensation segment one end of heat pipe structure extend in the middle of collecting pipe, heat exchange is carried out with air-conditioning or heat exchanger fluid, forming heat abstractor compact, efficient, fin can also be added in condensation segment one end, strengthens heat transfer.But, due to single on state characteristic of heat pipe, the reversely heating from collecting pipe to battery is suppressed, and can adopt countercurrent heat pipes, and namely evaporator section is placed in collecting pipe, and condensation segment is placed in sleeve side, thus realizing the two-ways regulation of battery temperature.
Described heat conduction pipeline is one layer or multilamellar, is distributed along heat conducting sleeve short transverse；Described heat conduction pipeline is single tube or adopts multitube series connection.
Described heat conducting sleeve material adopts the high thermal conductivity materials of the easily processing such as metallic aluminium, copper, titanium, ferrum, it is also possible to be that thermal conductive ceramic material such as aluminium oxide forms the circle or square sleeve structure that coordinate battery.Thermal conductivity adopts more than 10W/mK, and thickness is at 0.3～6mm.
Can filling gel, epoxy, acrylic acid etc. be the heat conduction bonding material of substrate between described heat conducting sleeve and battery, to eliminate interfacial air gap, strengthen heat conduction, improve mechanical attachment intensity simultaneously, reduce mechanical shock.The heat conducting sleeve of metal is through surface treatment, such as anodic oxidation, has certain electric simulation strength.Heat conducting sleeve inner wall surface is also carried out anodic oxidation passivation and processes, and has low voltage electrical insulation intensity.
Described heat conducting sleeve can also adopt the planform of the laminating battery being partially retained in battery periphery, and the part such as circular arc or laminating rectangular cell is square, is connected with heat conduction pipeline through heat conduction support.
Carry out local each through heat conduction bonding agent between described heat conducting sleeve, between heat conducting sleeve and heat conduction pipeline to be connected, strengthen mechanical strength.The bonding interface material filled between heat conduction battery and heat conducting sleeve is polyurethane, organosilicon, epoxy resin or acrylic adhesive material, and its thermal conductivity is not less than 0.2W/mk.
The tubing of described heat conduction pipeline adopts the high thermal conductivity materials of the easily processing such as metallic aluminium, copper, and thermal conductivity is more than 10W/mK, and wall thickness is at 0.3～6mm, it is possible to adopt pipe form or flat tube form.Flat tube form is easier to be arranged among battery bag, and the volume of battery bag and the effect of overall thermal managing device are had better impact.
Adopting the heat conduction pipeline of flat tube form, in pipe, cross-sectional width could be arranged to 0.2-6mm, highly the highest with heat conducting sleeve similar elevation.Arranging the cylindrical parts at bulb portion and the two ends including between battery, flat tube is extruded mid portion by metal circular tube and is formed, and end pipe and exterior line form No leakage by nipple, welding or hose coupling and connect；Or thermal-insulating body is stretched at one end or two ends, form No leakage connection by welding.
The fixing connection of heat conducting sleeve and heat conduction pipeline can adopt welding or glued joint, and the width of fixing coupling part more than the radius of heat conducting sleeve, forms mechanical strength and the good welding position of heat conduction, it is ensured that heat is from the hot transmission path on heat conducting sleeve heat conductive pipes road.Can also adopt direct 3D metallic print parts that heat conducting sleeve and heat conduction pipeline are attached.
Accompanying drawing 1 is the schematic top plan view that battery is carried out the device of heat management by present Tesla (CS) Koncern, Podebradska 186, Praha 9, Czechoslovakia employing cold pipeline of liquid, it can be seen that, what it adopted is liquid cold bending, try one's best battery of fitting by arranging liquid cold bending, but it is because without battery and the affixed transposition of the cold pipeline of liquid, however it remains the problem of Air Interface thermal resistance and radiating efficiency deficiency.
Accompanying drawing 2-4 is schematic top plan view and the schematic side view of the thermal management device of battery adopting heat conducting sleeve and heat conduction pipeline to coordinate of the present invention.Wherein accompanying drawing 3 illustrates to adopt the heat conduction pipeline signal of mono-layer tube, and accompanying drawing 4 have employed the signal of heat conduction pipeline of bimetallic tube.
Accompanying drawing 5-6 is the schematic diagram that heat conducting sleeve and heat conduction pipeline adopt the mode being cross-linked.Adopt to be cross-linked and be beneficial to the width increasing affixed part, improve the assembly manipulation that is connected.
Accompanying drawing 7-8 is the shape that heat conducting sleeve adopts part laminating battery, and is carried out the schematic diagram being cross-linked between heat conduction pipeline by support.Owing to heat conducting sleeve adopts part laminating, affixed part adopts the form of support to be connected to heat conduction pipeline, it is possible to make single unit system lighter, it is easy to install, and controls the volume of the battery bag after installing heat management device, is beneficial to the design of car load.
Accompanying drawing 9 adopts the heat management schematic diagram closing heat pipe structure for heat conduction pipeline, heat pipe one end and Battery shell connect, the other end stretches into the collecting pipe of the temperature adjustable fluid of air conditioning system and forms cooling passage, can add fin in this end of the heat pipe extending in collecting pipe and strengthen convection current.In order to can both to battery thermal under low temperature and room temperature, heat pipe adjacent in accompanying drawing can be homotype heat pipe, it is also possible to be operation temperature respectively at two kinds of heat pipes of low temperature and room temperature, i.e. Cryo Heat Tube and room temperature heat pipe.Owing to heat pipe operation has certain temperature range, it is 303-500K (30-227 DEG C) as Water Heat Pipes operates temperature, acetone heat pipe operation temperature 273-373K (0-100 DEG C), room temperature heat pipe can be classified as, Feron11 is 233-393K (-40-120 DEG C), ammonia 213-373K (-60-100 DEG C), Cryo Heat Tube can be classified as when battery temperature is higher, collecting pipe leads to cold wind, heat pipe dispels the heat to collecting pipe, comparatively speaking, Cryo Heat Tube starts to work temperature lower than room temperature heat pipe.When battery temperature is relatively low as lower than-20 DEG C, collecting pipe leads to warm braw, room temperature heat pipe cisco unity malfunction, and Cryo Heat Tube remains to start to work, heat by fin, heat pipe to battery heat supply, thus providing bidirectional temp regulation function.
Accompanying drawing 10 and accompanying drawing 11 are the schematic diagrams that the heat pipe of two kinds of different operating temperature is connected respectively to the collecting pipe on both sides, when Figure 10 is the collecting pipe being connected respectively to both sides, device carries out the schematic diagram cooled down, room temperature heat pipe condenser section one end is stretched into the cooling fluid collection pipe of air conditioning system and is formed cooling passage, can add fin in this end of the heat pipe stretched in collecting pipe and strengthen convection current.When Figure 11 is the collecting pipe being connected respectively to both sides, the schematic diagram that device is heated, Cryo Heat Tube evaporator section one end is stretched into the heating fluid collection pipe of air conditioning system and is formed intensification passage, can add fin in this end of the heat pipe stretched in collecting pipe and strengthen convection current.
Accompanying drawing 12 is the Computer Simulation temperature cloud picture of the set of cells of the heat conduction pipeline adopting the heat conducting sleeve of technical scheme and flat.The battery size adopted in figure is 18650 cylindrical batteries, heating power simulates heat condition under big multiplying power discharging, and single battery caloric value is 4W, and convective fluid is liquid water-ethylene glycol (50%/50%), mean flow rate 0.01m/s, inlet water temperature 20 DEG C.It will be seen that inside battery maximum temperature rises is only 13 DEG C, the temperature difference 1.5 DEG C between battery center, meet and be actually needed, improve the effect of heat radiation.Battery is conducted oneself with dignity 45 grams, and in this device, heat conducting sleeve adopts the aluminium that 0.8mm is thick, and its weight is at about 3.8 grams, less than the 10% of battery weight.
The air cooled set of cells Computer Simulation temperature cloud picture of employing that accompanying drawing 13 is present.The battery size adopted in figure is 18650 cylindrical batteries, flow is 12CFM, heating power simulates heat condition under big multiplying power discharging, it can be seen that temperature higher is 50.5 DEG C, the temperature difference 10.4 DEG C between battery center, thermograde is relatively big, and along with number of battery cells increases, maximum temperature can be further up, is extremely unfavorable for temperature management and control.
Compared with prior art, the thermal management algorithm of the present invention and device have following obvious advantage:
(1) heat conduction reinforced excellent effect: the present invention adopts the fixing connection heat management device of heat conducting sleeve and heat conduction pipeline, gets rid of the air gap between battery and heat conduction pipeline, thus greatly reducing interface resistance, reduces battery maximum temperature；Meanwhile, heat conducting sleeve has higher thermal conductivity, and battery plays good thermal diffusion and equal temperature effect, contributes to realizing excellent augmentation of heat transfer effect and battery samming effect.
(2) bidirectional temp regulation of battery: the present invention adopts the mode that heat conducting sleeve is connected with the collecting pipe of heat conduction pipeline with air conditioning system fluid, heat conduction pipeline or be connected with temperature adjustable fluid both ends open, or adopt closed at both ends form heat pipe and be connected with the collecting pipe of temperature adjustable fluid, thus realizing good bidirectional temp regulation；
(3) mechanical stability and hot property stability improve: the present invention adopts the connected heat management device of heat conducting sleeve and heat conduction pipeline, to reduce, eliminate between heat pipe and battery cell because of kinetic collision and sliding, improve system mechanics intensity, simultaneously, also the air gap is eliminated, dredging thermally conductive pathways, it is ensured that hot property is steady in a long-term.
(4) easy for installation, compact conformation, light: the heat management device of the present invention can pre-assembly, then battery is installed, each battery is fixed by heat conducting sleeve, directly installs location, and carries out other operations such as electrode and connect.For 18650 cylindrical batteries, battery is conducted oneself with dignity 45 grams, and heat conducting sleeve adopts the aluminium that 0.8mm is thick, and its weight is at about 3.8 grams, less than the 10% of battery weight, can reach the effect of heat radiation, can strengthen again mechanical performance, also light is easily assembled.
Claims (10)
1. a battery bag thermal management algorithm, it is characterized in that: the battery cell at battery bag is outside equipped with the heat conducting sleeve of parcel battery, described heat conducting sleeve is connected with the heat conduction pipeline with Heat transmission function, by the Heat transmission of heat conduction pipeline, the battery of battery bag is realized heat exchange.
2. battery bag thermal management algorithm as claimed in claim 1, it is characterised in that: described heat conduction pipeline adopts both ends open, intermediate flow homoiothermic gas or liquid, is carried out thermal convection current by homoiothermic gas or liquid by heat exchanger/air conditioning system, it is achieved temperature adjustment.
3. battery bag thermal management algorithm as claimed in claim 1, it is characterised in that: described heat conduction pipeline adopts the heat pipe of closed at both ends to carry out Heat transmission, it is achieved temperature adjustment.
4. apply battery bag thermal management algorithm as claimed in claim 1 and carry out the device of heat management for one kind, it is characterized in that: include heat conduction pipeline and the heat conducting sleeve affixed with heat conduction pipeline, described heat conducting sleeve is wrapped in outside the battery cell of battery bag, the inside of heat conducting sleeve and the external dimensions of battery coordinate, it is fixed on heat conduction pipeline outside heat conducting sleeve, the heat that battery produces is conducted by described heat conduction pipeline by thermal convection current, and the battery of battery bag is realized heat exchange.
5. battery bag heat management device as claimed in claim 4, it is characterized in that: described heat conduction pipeline both ends open, centre passes into the fluid regulated through air-conditioning or heat exchanger system, at fluid through heat conduction pipeline and heat conducting sleeve generation heat exchange, the inducer at heat conduction pipeline two ends and outlet section are all connected with collecting pipe, then are connected with air-conditioning or heat exchange manifold.
6. battery bag heat management device as claimed in claim 4, it is characterized in that: described heat conduction pipeline adopts the heat pipe structure of closed at both ends, inside is filled with porous core, part forms high heat-conductive thermo tube structure equipped with liquid refrigerant, evaporator section and the described heat conducting sleeve of heat pipe structure are affixed, condensation segment one end of heat pipe structure extend in the middle of collecting pipe, carries out heat exchange with air-conditioning or heat exchanger fluid.
7. the battery bag heat management device as described in one of claim 4 to 6, it is characterised in that: described heat conduction pipeline is one layer or multilamellar, is distributed along heat conducting sleeve short transverse；Described heat conduction pipeline is single tube or adopts multitube series connection.
8. the battery bag heat management device as described in one of claim 4 to 6, it is characterised in that: described heat conducting sleeve is the planform of the laminating battery being all wrapped in battery periphery, is filled with heat conduction bonding material between battery and heat conducting sleeve.
9. the battery bag heat management device as described in one of claim 4 to 6, it is characterised in that: described heat conducting sleeve is the planform of the laminating battery being partially retained in battery periphery, is connected with heat conduction pipeline through heat conduction support.
10. battery bag heat management device as claimed in claim 4, it is characterised in that: carry out local each through heat conduction bonding agent between described heat conducting sleeve, between heat conducting sleeve and heat conduction pipeline and be connected, strengthen mechanical strength, reduce thermal contact resistance.
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| CN201610144883.2A CN105742753A (en) | 2016-03-15 | 2016-03-15 | Thermal management method and device for battery pack |
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| CN201610144883.2A CN105742753A (en) | 2016-03-15 | 2016-03-15 | Thermal management method and device for battery pack |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106450093A (en) * | 2016-11-30 | 2017-02-22 | 河南森源重工有限公司 | Liquid cooling and heating control box body for cylinder power battery |
| CN106602170A (en) * | 2016-12-16 | 2017-04-26 | 中国矿业大学 | Variable contact-type battery heat management system |
| CN106711553A (en) * | 2017-02-24 | 2017-05-24 | 华霆（合肥）动力技术有限公司 | Battery module and battery module heat management system |
| CN106711547A (en) * | 2017-01-18 | 2017-05-24 | 华霆（合肥）动力技术有限公司 | Heat management device and power supply device |
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Application publication date: 20160706 |