Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of battery modules heat management device based on pyroelectric effectAnd method, the present invention is in battery case, the compact setting semiconductor heat electrical component in the lower part of battery modules, passes through leading for high-termal conductivityHot body and battery form thermal conducting path, under megathermal climate environment and execute different operating modes under microthermal climate environment, haveHave that thermal response speed is fast, temperature control is accurate, noiseless, applies in energy storage lithium ion battery, electricity can be reduced in hot weatherPond temperature can heat battery in severe cold weather, be greatly improved battery life and job stability, also, described device structureCompact, small volume is conducive to arrangement in a limited space.
The present invention is achieved by the following technical solutions:
A kind of battery modules thermal management algorithm based on pyroelectric effect, it is characterised in that:
Battery modules-heat carrier of battery pack box house-semiconductor heat electrical component-liquid thermal conductivity channel forms thermally conductive logicalHeat-conducting liquid suction circulation in liquid thermal conductivity channel is formed liquid heat exchange access, institute by road, the pump machine outside battery pack cabinetStating battery modules thermal management algorithm includes two kinds of operating modes:
Execute refrigeration mode under high temperature environment, semiconductor heat electrical component upper temp drop to environment temperature hereinafter, atFor chill surface, and battery modules temperature is reduced to by environment temperature by heat carrier heat transfer hereinafter, semiconductor thermoelectric group simultaneouslyPart temperature of lower rises, and becomes radiating surface, and pump machine is opened at this time, and the heat that radiating surface generates passes through thermally conductive in liquid heat exchange accessThe circulation of liquid carries discharge；
Heating mode is executed at low ambient temperatures, and semiconductor heat electrical component upper temp rises, and becomes heating surface, by leadingHot body heat conduction heats battery modules temperature to reach normal operating temperature range, while semiconductor heat electrical component lower part temperatureDegree decline, becomes heat-absorbent surface, if heat-absorbent surface temperature is lower than environment temperature, pump machine is opened, conductive fluid in liquid heat exchange accessThe cyclic absorption amount of heat of body exchanges heat, and starts to work and generates heat with battery modules, and heat-absorbent surface temperature gradually rises, until being equal toOr it is higher than environment temperature, at this time without using the cycle heat exchange of heat-conducting liquid in liquid heat exchange access, pump machine is closed, and passes through electricityPond lodge body directly exchanges heat.
A kind of device of the battery modules thermal management algorithm using above-mentioned based on pyroelectric effect, it is characterised in that:
In battery pack box house, from top to bottom sequentially it is close to configuration battery modules, heat transfer support plate, semiconductor thermoelectric groupHeat transfer support plate is close in part and liquid thermal conductivity channel, and the even multiple heat carriers of cloth in battery modules, heat carrier lower part, in which:
Heat transfer support plate is horizontal, and battery pack cabinet wall is close in edge；
Semiconductor heat electrical component includes that horizontal the first heat exchanger plate and the second heat exchanger plate and vertically-arranged are tightly attached to the twoBetween several thermoelectric units, each thermoelectric unit includes several pairs of p-type thermoelectric arms and N-type thermoelectric arm being electrically connected in series,Series/parallel is electrically connected between thermoelectric unit；The positive and negative anodes of single semiconductor heat electrical component directly with it is straight outside battery pack cabinetFlow power positive cathode electrical connection；Alternatively, after the electrical connection of multiple semiconductor thermoelectric component series/parallels, positive and negative anodes again with battery packDC power supply electricity positive and negative anodes connection outside cabinet；Also, the current direction of semiconductor heat electrical component allows hand over；
Liquid thermal conductivity channel is located at the battery pack bottom of box, and heat-conducting liquid is contained in liquid thermal conductivity channel, and corresponding liquid is ledThe both ends port of the passage of heat, opens up inlet and liquid outlet on battery pack cabinet, and liquid thermal conductivity channel passes through battery pack cabinetThe pump machine of exterior arrangement is connected to external heat exchanger.
Refrigeration mode is executed in hot weather, due to paltie effect, first heat exchange on semiconductor heat electrical component topPlate is cold plate, and rapid drop in temperature to environment temperature, can be by battery temperature hereinafter, radiated by heat transfer support plate, heat carrierDegree is reduced to environment temperature hereinafter, and the second heat exchanger plate of semiconductor heat electrical component lower part is heat sink, the heat generatedIt is discharged by liquid thermal conductivity channel and external heat exchanger；Heating mode, semiconductor heat are switched under cold low temperature environmentElectrical component positive and negative umpolung makes first heat exchanger plate on semiconductor heat electrical component top become heating plate, by leading after energizationHot support plate, heat carrier heating, rise battery temperature, reach normal operating temperature range, and under semiconductor heat electrical componentSecond heat exchanger plate in portion is absorber plate, if the second heat exchanger plate temperature, which is equal to, is higher than environment temperature, pump machine is closed, if theTwo heat exchanger plate temperature are lower than environment temperature, and pump machine is opened, and the second heat exchanger plate passes through the heat-conducting liquid in liquid thermal conductivity channelAmount of heat is absorbed, and battery is heated by the first heat exchanger plate, heat transfer support plate.
Further, the heat carrier is the rectangular plate-like heat transmission fin for being parallel to battery configuration, the battery modulesMultiple square brick shape battery stacks are horizontal or vertically-arranged in column:
If battery stack is horizontal, upright parallel configures multiple rows of thermally conductive supporting vertical plate above the heat transfer support plate, thermally conductiveHeat transfer support plate is close in supporting vertical plate lower end, and the adjacent thermally conductive supporting vertical plate of two rows, adjacent two layers are close in the battery both ends of stackingA piece of heat transmission fin is configured between battery, alternatively, configuring one layer of battery between two panels heat transmission fin, heat transmission fin is close to adjacentBattery, left and right two ora terminalis are close to the adjacent thermally conductive supporting vertical plate of two rows；
If battery vertically-arranged in column, a piece of heat transmission fin is configured between two column batteries, alternatively, matching between two panels heat transmission finOne piece of battery is set, alternatively, the ipsilateral corresponding a piece of heat transmission fin of configuration of each column battery, heat transmission fin are close to adjacent battery, underIt is close to heat transfer support plate in end；
Heat-conducting pad is configured or not configured between battery and the binding face of heat transmission fin；If configuring heat-conducting pad, leadThe size of heat pad piece and the size of battery and the binding face of heat transmission fin match, and heat-conducting pad is graphite heat-conducting fin, grapheneThermally conductive sheet or organosilicon thermally conductive sheet, heat-conducting pad are connected with heat transmission fin and battery respectively by gum.
Battery-heat transmission fin-heat transfer support plate thermal conducting path, by the heat transmission fin of high-termal conductivity and single battery andThe directly contact of heat transfer support plate carries out heat transfer, and the coefficient of heat transfer is big, and thermal response speed is fast, and heat transfer efficiency is high, and each electricityPond, single battery each position temperature it is uniform, ensure that the working efficiency of battery, and the good reliability that battery uses；Opposite battery and heat transmission fin, the flexibility of heat-conducting pad is good, can reduce interface thermal conduction resistance, improves heating conduction, and delayRush mechanical stress.
Further, the heat carrier includes the heating column for being in the form of a column vertical configuration and the thermally conductive diffuser plate of landscape configuration,Multiple cylindrical batteries of the battery modules are in rectangular vertical configuration, are closely sleeved in the aperture of thermally conductive diffuser plate, thermally conductiveColumn upper end is fastened on thermally conductive diffuser plate bottom, and heat transfer support plate is close in lower end, and it is rectangular that battery is located at surrounding for four heating columnsAt center, battery is not contacted with heating column.
Heating column cross sectional shape is rectangular, round, star or other similar, with biggish thermally conductive outer rim section shapesShape forms by the thermally conductive diffuser plate of battery-- heating column-heat transfer support plate thermal conducting path, passes through the thermally conductive diffuser plate of high-termal conductivityHeat transfer is carried out with single battery and directly contacting for heat transfer support plate with heating column, heating column has thermally conductive and support dualFunction.
Further, filling phase-change material layers or Embedding Material in the battery pack cabinet above the heat transfer support plateLayer or insulating heat-conductive oil；Alternatively, the interior filling phase transformation material of battery pack cabinet between the heat transfer support plate and thermally conductive diffuser platePerhaps Embedding Material layer or insulating heat-conductive are oily for the bed of material；The phase-change material layers are the stone comprising phase transition temperature at 20~80 DEG COne of wax, fatty acid phase-change material or a variety of phase-change material layers；The elasticity Embedding Material layer is greater than for thermal conductivityOrganosilicon, the urethane material of 0.2W/mK；The insulating heat-conductive oil is organic conduction oil that thermal conductivity is greater than 0.05W/mK.
Phase-change material layers or thermoplasticity Embedding Material layer have certain heat-conducting effect: latent heat of the phase-change material when dissolvingThe partial heat of battery generation can be absorbed, and keep temperature-resistant, so that battery temperature thermal shock amplitude is reduced, in addition, logicalThermally conductive diffuser plate, heating column and battery pack cabinet or heat transmission fin and battery pack cabinet are crossed, other part heat is exported, thusFurther decrease battery temperature；Thermoplasticity Embedding Material usually has heat filling, can also further strengthen thermally conductive, reduction heatImpact can reduce mechanical stress, slow down mechanical shock in addition, thermoplasticity Embedding Material has preferable toughness and ductility.
Insulating heat-conductive oil is one kind of common synthetic oil or refined mineral oil, such as: alkyl benzene-type (benzenoid form) is thermally conductiveOil, biphenyl and Biphenyl Ether eutectic conduction oil, organic silicone oil, the DowTherm conduction oil of typical brand such as DOW Chemical, in vehicleIn driving process, thermally conductive, the convection current comprehensive function that the liquid concussion of conduction oil generates are conducive to battery and radiate outward.
Further, the heat carrier is copper or iron heat carrier, alternatively, heat carrier is that outer surface covers one layer through anodic oxygenAfter changing Passivation Treatment, the aluminium heat carrier or aluminium alloy heat carrier of the oxidation film layer with middle piezoelectricity dielectric strength；It is described thermally conductiveSupport plate is that copper sheet or iron plate have alternatively, heat transfer support plate is that outer surface covers one layer after anodic oxidation passivation is handledThe aluminium sheet or aluminium alloy plate of the oxidation film layer of piezoelectricity dielectric strength, with a thickness of 0.5~20mm, with thermally conductive double with supportWeight function.Not only heat transfer efficiency is high and easy to process for the material selection of heat carrier, heat transfer support plate；Aluminium after anodic oxidationOr its alloy, hardness and wearability are improved, horniness anode oxide film fusing point is up to 2320K, breakdown voltage resistant up to 2000V,With excellent electrical insulating property.
Further, it is equipped with supporting rib stiffener between first heat exchanger plate and the second heat exchanger plate, the first heat is handed overIt changes plate and the second heat exchanger plate fixes as one；The battery pack bottom of box has thermally conductive Jia Qiang Zhu.Supporting rib stiffener is by low thermally conductiveMaterial is made, alternatively, being equipped with low heat conduction material between supporting rib stiffener and the first heat exchanger plate and the contact surface of the second heat exchanger plateBacking strap piece, supporting rib stiffener only play the role of reinforcing semiconductor heat electrical component mechanical strength；Thermally conductive reinforcing rib not only increases electricityThe mechanical strength and impact resistance of pond module box body also increase the surface area of battery case, accelerate battery modules tank surfaceHeat transfer effect.
Further, between first heat exchanger plate and heat transfer support plate, the second heat exchanger plate and liquid thermal conductivity channel 7It is close together between top by interface thermal conductive material layer；The interface thermal conductive material layer is with polyurethane, organosilicon, epoxyResin or acrylic acid are matrix, and thermal conductivity is not less than the conducting adhesive glue-line of 0.2W/mK；Alternatively, first heat exchanger plate andSecond heat exchanger plate outer surface has the coat of metal, is connected respectively with heat transfer support plate and liquid thermal conductivity channel roof by weldingIt connects.There are two effects for interface thermal conductive material layer tool: first is that guaranteeing that the thermal conductive contact face between semiconductor heat electrical component and battery is filledPoint, thermally conductive barrier caused by the air gap for avoiding regional area from being formed by reasons such as roughness, unevenness, assembly, second is that boundaryFace thermal conductive material layer can also play the role of being mechanically fixed and mitigating mechanical stress.
Further, the first heat exchanger plate 4 and the second heat exchanger plate 6 are ceramic mould electrical isolation heat exchanger plate, the p-type heatFigure of merit ZT=0.5~2.4 of electric arm and N-type thermoelectric arm.
According to paltie effect, the heat absorption of thermoelectric components cold end is Qc=2NsITc under ideal cooling condition, and hot end heat release isQh=2NsITh, Qc is cold end caloric receptivity in formula, and N is thermoelectric arm logarithm, and s is Seebeck coefficient, and I is electric current, and Tc, Th are respectivelyCold and hot end temperature (K).Due to Joule heat and conduction effect comprehensive function, cold end caloric receptivity Qc, electrical power in practicalQte, hot end thermal discharge Qh are expressed as (H.Y.Zhang, Y.C.Mui, M.Tarin, Analysis ofthermoelectric cooler performance for high power electronic packages,AppliedThermal Engineering 30,2010, pp.561-568):
In above-mentioned formula: ρ, k, G are respectively thermoelectric arm resistivity, thermal coefficient and geometric parameter, be defined as area andThe ratio between height, Δ T are hot end and cold-end temperature difference.
It can be seen that the numerical value of Seebeck coefficient s is bigger, thermoelectric arm thermal coefficient k and electricalresistivityρ are smaller, then semiconductorThermoelectric components working efficiency is higher, and nondimensional figure of merit ZT=s2T/k is also bigger (wherein T indicates mean temperature).Pass throughP-type and N-type semiconductor is made in doped bismuth telluride alloy base material, by a p-type thermoelectric arm and a N-type thermoelectric arm metal water conservancy diversionPlate connects, and constitutes a basic thermoelectric unit of semiconductor cooler.Document has been delivered according to the Massachusetts Institute of Technology,(Zhiting Tian,Sangyeop Lee,Gang Chen,Heat Transfer in ThermoelectricMaterials and Devices, ASME J Heat Transfer135,2013, pp.061605-1), bismuth telluride ZT value canReach 0.5~1 or so, and novel bismuth telluride/antimony telluride composite thermoelectric material ZT value is up to 2.4.It, can basis in actual designThermoelectric components material, the temperature of hot and cold side, current range and need to control calorific value, temperature and the radiator structure of object intoRow optimization design.
Further, the liquid thermal conductivity channel is snakelike embedding tube passage or Pocket Machining channel, internal coolant bodyFor water-ethylene glycol combination cooling liquid.It is capable of providing high efficient heat exchanging coefficient, the coefficient of heat transfer is up to several hundred to up to ten thousand W/m2K, liquid are ledPassage of heat plate body surrounding is closely connected by welding, screw bolt reinforcing and battery pack cabinet, and semiconductor heat electrical component is installed at topSecond heat exchanger plate can carry out good heat exchange with semiconductor heat electrical component, and in cooling mode will by external heat exchangerHeat dissipation is into atmosphere.
The beneficial effects of the present invention are:
1, it can guarantee that battery works in optimum temperature environment always.Since hot weather adds exposure in sunshine, electricityPond temperature can reach 50-60 DEG C, directly initiates battery and is possible to cause thermal runaway, the present invention is freezed using thermoelectric components, can be incited somebody to actionThe battery temperature of overheat is down to 40 DEG C of environment temperature or less and reuses battery, greatly improves battery reliability and working performance.
2, the heat exchange structure of direct contact type, heat exchange efficiency are high.It is compared with the device of traditional refrigeration cycle water tank, this hairIt is bright thermoelectric components are directly arranged in battery bottom to freeze, reduce the intermediate ring of water tank refrigeration and pipeline loss of refrigeration capacitySection, little power consumption, thermal response is fast, and system effectiveness is high, another aspect waste heat discharge can by the very high Water-cooling circulating of the coefficient of heat transfer withAnd external heat exchanger, system effectiveness can further improve, and heat exchanger is avoided closely to lead to very much battery preheating effect from battery modules.
3, refrigeration, heating are integrated in one, compact-sized.The present apparatus can not only be freezed using thermoelectric components, in low temperatureSevere cold weather, the reversed electrified regulation of thermoelectric components, by extension fin structure arrangement can quickly heat battery to 0 degree Celsius withOn, it is compact-sized, it is suitable for Vehicular dynamic battery system.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
Shown in as shown in Figure 1, Figure 3 and Figure 4, inside battery pack cabinet 16, from top to bottom sequentially it is close to configuration battery modules 1,Heat transfer support plate 3, semiconductor heat electrical component and liquid thermal conductivity channel 7, and the even multiple heat carriers of cloth in battery modules 1, it is thermally conductiveHeat transfer support plate 3 is close in body lower part, forms battery modules-heat carrier-semiconductor heat electrical component-liquid thermal conductivity channel formation and leadsHeat passage, in which:
Heat transfer support plate 3 is horizontal, and 16 inner wall of battery pack cabinet is close in edge；
Semiconductor heat electrical component includes that horizontal the first heat exchanger plate 4 and the second heat exchanger plate 6 and vertically-arranged are tightly attached to twoSeveral thermoelectric units 5 between person, each thermoelectric unit 5 include several pairs of p-type thermoelectric arms and N-type thermoelectricity being electrically connected in seriesArm；Series/parallel is electrically connected between thermoelectric unit 5；After the electrical connection of multiple semiconductor thermoelectric component series/parallels, positive and negative anodes again withDC power supply electricity positive and negative anodes connection outside battery pack cabinet 16；Also, the current direction of semiconductor heat electrical component allows hand over.
Supporting rib stiffener 12 is equipped between first heat exchanger plate 4 and the second heat exchanger plate 6, by the first heat exchanger plate 4 and theTwo heat exchanger plates 6 fix as one；16 bottom of battery pack cabinet is with thermally conductive plus strong Zhu；
Heat carrier is that outer surface covers one layer after anodic oxidation passivation is handled, the oxidation film with middle piezoelectricity dielectric strengthThe aluminium heat carrier or aluminium alloy heat carrier of layer；Heat transfer support plate 3 is that outer surface covers one layer after anodic oxidation passivation is handled,The aluminium sheet or aluminium alloy plate of oxidation film layer with middle piezoelectricity dielectric strength, with a thickness of 0.5~20mm.
Liquid thermal conductivity channel 7 is located at 16 bottom of battery pack cabinet, and heat-conducting liquid, corresponding liquid are contained in liquid thermal conductivity channel 7The both ends port of body passage of heat 7, opens up inlet 14 and liquid outlet 15 on battery pack cabinet 16, and liquid thermal conductivity channel 7 is logicalThe pump machine for crossing battery pack cabinet exterior arrangement is connected to external heat exchanger.
Refrigeration mode is executed in hot weather, due to paltie effect, first heat exchange on semiconductor heat electrical component topPlate 4 be cold plate, rapid drop in temperature to environment temperature hereinafter, by heat transfer support plate 3, heat carrier radiate, can be by batteryTemperature is reduced to environment temperature hereinafter, and the second heat exchanger plate 6 of semiconductor heat electrical component lower part is heat sink.
Heating mode is switched under cold low temperature environment, the reversion of semiconductor heat electrical component positive and negative anodes makes half after energizationFirst heat exchanger plate on conductor thermoelectric components top becomes heating plate, is heated by heat transfer support plate, heat carrier, can be by battery temperatureDegree rises, and reaches normal operating temperature range, and the second heat exchanger plate of semiconductor heat electrical component lower part is absorber plate,If the second heat exchanger plate temperature, which is equal to, is higher than environment temperature, pump machine is closed；If the second heat exchanger plate temperature is lower than environment temperatureDegree, liquid thermal conductivity channel are opened, and the second heat exchanger plate absorbs amount of heat by the heat-conducting liquid in liquid thermal conductivity channel, and leads toCross the first heat exchanger plate, heat transfer support plate heating battery.
As shown in Figure 1, Figure 3, heat carrier is the rectangular plate-like heat transmission fin 2 for being parallel to battery configuration, and heat transmission fin 2 squeezesMolding, or fixed between heat transfer support plate 3 by welding, splicing, with a thickness of 0.1~10mm, form the thermally conductive wing of battery-Piece-heat transfer support plate-thermoelectric components-liquid cooling system thermal dissipating path.In Fig. 1, multiple square brick shape batteries of battery modules 1 are in columnVertically-arranged, the battery pack cabinet 16 of 3 top of heat transfer support plate is interior to fill phase-change material layers 17, and the battery stack in Fig. 3 is horizontal.
In Fig. 3,3 top upright parallel of heat transfer support plate configures the thermally conductive supporting vertical plate 8 of 3 rows, and thermally conductive 8 lower end of supporting vertical plate is tightThe adjacent thermally conductive supporting vertical plates (8) of two rows are close at the battery both ends of patch 3,3 layer stackup of heat transfer support plate, between adjacent two layers batteryA piece of heat transmission fin 2 is configured, heat transmission fin 2 is close to adjacent battery, and it is vertical that left and right two ora terminalis is close to the thermally conductive support of adjacent two rowsPlate 8.
As shown in Figure 1, the ipsilateral corresponding a piece of heat transmission fin 2 of configuration of each column battery, as shown in Fig. 2, two panels heat transmission fin 2Between configure one piece of battery, heat transmission fin 2 is close to adjacent battery, and heat transfer support plate 3 is close in lower end.
As shown in Figure 1, configure heat-conducting pad 9 between battery and the binding face of heat transmission fin 2, size and battery with it is thermally conductiveThe size of the binding face of fin 2 matches, heat-conducting pad 9 be graphite heat-conducting fin, graphene thermally conductive sheet or organosilicon thermally conductive sheet,Heat-conducting pad 9 is connected with heat transmission fin 2 and battery respectively by gum.
As shown in Figures 4 and 5, heat carrier includes the heating column 11 for being in the form of a column vertical configuration and the thermally conductive diffuser plate of landscape configuration13, multiple cylindrical batteries of the battery modules 1 are in rectangular vertical configuration, are closely sleeved on the aperture of thermally conductive diffuser plate 13Interior, 11 upper end of heating column is fastened on thermally conductive 13 bottom of diffuser plate, and heat transfer support plate 3 is close in lower end, and battery is located at four heating columnsAt 11 square central surrounded, battery is not contacted with heating column, the battery pack between heat transfer support plate 3 and thermally conductive diffuser plate 13Phase-change material layers 17 are filled in cabinet 16.
As shown in Figure 1, between the first heat exchanger plate 4 and heat transfer support plate 3, the second heat exchanger plate 6 and liquid thermal conductivity channel 7It is close together between top by interface thermal conductive material layer 10；The interface thermal conductive material layer 10 be with polyurethane, organosilicon,Epoxy resin or acrylic acid are matrix, and thermal conductivity is not less than the conducting adhesive glue-line of 0.2W/mK.
Liquid thermal conductivity channel 7 as shown in Figure 8 is Pocket Machining channel, has water cooling fin 702 and groove 701, conduitWidth dimensions have biggish heat exchange area and good exchange capability of heat between 10mm-0.3mm.
As shown in figs. 6-7, thermoelectric unit is connected by several pairs of p-types and N-type thermoelectric arm, several thermoelectric units are serial/parallelIt is unified into semiconductor heat electrical component.As shown in fig. 6, additional power source anode is connected with thermoelectric components cathode under refrigeration work mode,Electronics is migrated to electric current opposite direction, forms refrigeration mode, and the first heat exchanger plate 4 is cold end (temperature Tc), the second heat exchanger plate 6For hot end (temperature Th)；As shown in fig. 7, semiconductor heat electrical component is under heating work mode, additional power source anode and thermoelectricityComponent anode is connected, and forms heating mode.
Figure 10, Figure 11 are the calculating of the temperature evolution of high-temperature battery (50 DEG C) when semiconductor heat electrical component is 600 seconds coolingMachine simulation result, battery do not start, calorific value zero.Using 2x3 array semi-conductor thermoelectric components, each thermoelectric components having a size of50mm x 50mm, maximum calorific value Qcmax=310W, including 128 pairs of thermoelectric arms, battery modules include that 12 soft-package batteries are verticalFormula is placed, each battery size 10cm x12cm x1cm, and is fitted closely with fin plate.Consider 40 DEG C of temperature, battery is because of vehicle bodyInsolation reaches 50 DEG C, and under 8A electric current refrigeration work mode, edge battery and intermediate cell temperature gradually decline, and declines in 600sTo 21.9 DEG C and 24.5 DEG C, it can normally start trouble free service.Figure 10 shows that high-temperature battery (50 DEG C) is cooling in thermoelectric componentsThe Temperature Distribution computer artificial result of 600s (battery does not start).
As shown in figure 9, same battery module structure, if opening battery, single electricity in thermoelectric components refrigeration momentPond calorific value is 8W, 12 battery-heating 96W, and temperature still gradually declines under thermoelectric components 8A refrigeration mode situation, is makingAt cold 600 seconds, edge battery and intermediate cell temperature gradually decline, and drop to 34 DEG C and 29 DEG C in 600s, are not influencing battery justOften operation.
As shown in figure 12, (- 30 DEG C) under low temperature environment, thermoelectric components heating mode is opened, battery temperature gradually rises,600s is heated in thermoelectric components, stands 120s later, it can be seen that battery temperature obviously on 0 DEG C, can normally start.