CN101340012A - Heat radiation system of nickel-hydrogen battery set for hybrid power vehicle - Google Patents
Heat radiation system of nickel-hydrogen battery set for hybrid power vehicle Download PDFInfo
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- CN101340012A CN101340012A CNA2008100698588A CN200810069858A CN101340012A CN 101340012 A CN101340012 A CN 101340012A CN A2008100698588 A CNA2008100698588 A CN A2008100698588A CN 200810069858 A CN200810069858 A CN 200810069858A CN 101340012 A CN101340012 A CN 101340012A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The invention discloses a Nickel-hydrogen battery pack heat dissipation system used in a hybrid motor vehicle. A reasonable battery interval and a suitable inclination angle are first designed to realize the vertical flow of air; and an upper layer battery and a lower layer battery are arranged at certain interval; the lower layer battery is arranged at the central line of the upper layer battery and the upper layer battery is arranged at the midline of the lower layer battery, which causes the air not to flow into the upper side flow channel of the battery earlier; secondly, a thermal resistor is added on the battery surface based on the improvement of the structure; the thermal resistor is wrapped on the outside of a the battery module; the required wrapping thickness of each module is determined based on the heat dissipation effect; the surface of the battery with low temperature and good heat dissipation effect is thicker and the surface of the battery with high temperature and poor heat dissipation effect is thinner, thus the heat exchange between the battery and the air is reduced, and the local battery temperature is improved, and furthermore, the temperature homogeneity of the whole battery pack is improved. The invention relates to a method that takes the temperature homogeneity of the module as priority by compromising the heat dissipation strength of the battery.
Description
Technical field
The invention belongs to the automotive electronics applied technical field, be specifically related to a kind of cooling system of Hybrid Vehicle battery pack thermal resistance.
Background technology
Electrokinetic cell is the crucial control assembly in the hybrid vehicle system, and its performance quality will directly influence the vehicle performance quality.Power nickel-hydrogen cell become the automobile-used first-selected power supply of HEV, but the heat production problem in the Ni-MH battery charging process is one of principal element that influences its normal use with advantages such as its specific energy height, specific power height, the good environmentally safe of cycle life, fail safe height.Along with the rising of temperature, the discharge capacity of Ni-MH battery reduces, and charge efficiency descends, and self discharge strengthens, and cell decay is quickened.And at high temperature, the temperature non of battery pack increases to some extent.For large-scale Ni-MH battery group (as electric vehicle), only rely on battery design, measures such as prescription adjustment etc. can not solve the heat production problem in the above-mentioned Ni-MH battery charging process, must be equipped with cooling system, the heat monitoring and the heat management of battery pack are significant to the car load security of operation.
Selecting the suitable type of cooling is the prerequisite of each battery module of equalization, mode such as that the type of cooling has is air-cooled, liquid cooling, phase-change material cooling.Air cooling is plain mode, only need allow air flow through battery surface.The major advantage of air cooling mode has: (1) is simple in structure, and weight is less relatively; (2) possibility of leakage does not take place; Energy available ventilation when (3) pernicious gas produces; (4) cost is lower.Shortcoming is that heat exchange coefficient is low between itself and the battery wall, and cooling, firing rate are slow.Liquid cools is divided into direct contact and the non-dual mode that directly contacts.Mineral oil can be used as the direct contact heat transfer medium, and water or anti-icing fluid can be used as typical non-direct contact heat transfer medium.Liquid cooling must could be cooled off battery by heat exchange facilities such as water jackets, and this has reduced heat exchange efficiency to a certain extent.The major advantage of liquid cooling mode has: heat exchange coefficient height between (1) and the battery wall, and cooling, firing rate is fast; (2) volume is less.Major defect has: the possibility that has leakage; Weight is relatively large; Maintenance and maintenance are complicated; Need parts such as water jacket, heat exchanger, the structure relative complex.The phase transformation coolant mechanism is to lean on fusing (solidifying) latent heat of material to come work, utilize gasification or solid at low temperatures fusion process or the sublimation process of refrigerant liquid (water, liquefied ammonia, liquid fluorine Leon etc.) under low pressure, low temperature, draw gasification latent heat, melting heat or the heat of sublimation to the object that is cooled, to reach cooling purpose.The heat that it can the time send discharge stores with the form of latent heat, discharges in charging or when working under terribly cold environment.The advantage of phase transformation coolant cooling is a heat exchange coefficient height between (1) and the battery wall, effectively utilizes energy; (2) volume is less.Major defect has: exist maintenance and maintenance complicated; Cost is than higher.
The battery pack of parallel type hybrid dynamic electric motor car is as auxiliary power component, service conditions is not very abominable, adopt the air cooling mode just may reach instructions for use, the present invention is directed to the cylinder-type nickel-metal hydride battery group of parallel type hybrid dynamic automobile, adopt air cooling, and overcome the above-mentioned shortcoming of cooling air mode in the prior art effectively.
Air cooling way with the air cooling heat radiation generally has serial and walks abreast two kinds, as depicted in figs. 1 and 2.Under the serial draft type shown in Figure 1, cold air is blown into from the right side from the left side and blows out.Air constantly is heated in flow process, so the cooling effect on right side is poorer than the left side, battery pack temperature from left to right raises successively in the battery case.
The hybrid vehicle Prius of Japan and Insight adopt the serial draft type.Parallel draft type shown in Figure 2, if assignment of traffic is even, the temperature distribution of battery will compare evenly.What new Insight adopted is exactly parallel aeration structure, the intake and exhaust channel of its wedge shape makes that slit pressure differential up and down is consistent substantially between disparate modules, guarantee to blow over the consistency of the air mass flow of different battery modules, thereby guaranteed the consistency of battery pack temperature field distribution.
But in the experiment of actual battery temperature field, the design of parallel aeration structure need design the intake and exhaust channel of wedge shape and drain flow path, just can reach good effect.For the cylindrical battery of being studied, the intake and exhaust channel of its wedge shape and the runner of drainage are difficult to guarantee the consistency of battery pack temperature field distribution.Method can be used for reference, but is still waiting to improve.
Summary of the invention
The objective of the invention is for satisfying the needs of hybrid vehicle exploitation, a kind of radiator structure at cylindrical Hybrid Vehicle Ni-MH battery is disclosed, the uniformity in battery pack temperature field in use can be reached ± 2 ℃, improve the reliability and the consistency of battery performance, thereby improve performance and the cycle life and the safety in operation of car load, hybrid vehicle is developed with promotion.
The cooling system of the Hybrid Vehicle Ni-MH battery group bag thermal resistance that the present invention proposes comprises:
Include thermal resistance 4, air-out conduit 5, air outlet 6, blower fan 7, the cell support frame 8 of air inlet 1, support bar 2, air intake conduit 3, battery module and coating.Described batteries 4 supports by storage battery bearing support 8 and support bar 2, and is fixed on the base plate of accumulator box, and the housing of battery pack outside connects by bolt.End at battery case is provided with air inlet 1, the other end sets out air port 6, described battery pack 4 minutes is upper and lower two-layerly to be arranged in the battery case obliquely, two row's battery pack form the air intake conduit 3 that links to each other with air inlet 1 and the air-out conduit 5 that links to each other with air outlet 6 of wedge shape respectively with the upper and lower inner surface of battery case, described air intake conduit 3 with air inlet 1 connecting place passage internal diameter maximum, along with the extension of air intake conduit, the passage internal diameter reduces gradually; Described air-out conduit 5 with air outlet 6 connecting place passage internal diameter maximums, air-out conduit 5 is along air outlet 6 directions dorsad, the passage internal diameter reduces gradually; Outside batteries also wraps up thermal resistance, in order to reduce battery and extraneous heat exchange, improves local cell temperature, the uniformity that thickness by thermal resistance is set and the spacing between the battery are come regulating cell group temperature field; Blower fan 7 is installed in air outlet 6 places, with cooling air suction air inlet, and the air intake conduit 3 vertical currents surface gap through between circular batteries by the battery pack both sides, flow to air-out conduit 5, after air outlet 6 is discharged, battery pack is played the effect of cooling.
The present invention compares with existing correlation technique, advantage one of the present invention is to have designed a rational battery spacing and a suitable inclination angle, realize the perpendicular flow of air, up and down two-layer simultaneously battery interval is arranged, lower floor's battery is on the center line of upper strata battery, the upper strata battery is on the center line of lower floor's battery, make air not flow into side runner on the battery too early, overcome the existing temperature field of existing Ni-MH battery radiator structure very problem of non-uniform (because the limited refrigerating gas flow process that causes of space outerpace size is long, cooling is similar to the series connection cooling, and the inlet and outlet temperature difference is big); The 2nd, on the improved basis of said structure, increase thermal resistance at battery surface, make battery and air reduce heat exchange, improve local cell temperature, thereby improve the whole battery group temperature homogeneity.This is a kind of sacrifice battery specific heat load, with the preferential method of module temperature homogeneity.The design of this radiator structure has not only guaranteed the uniformity in cell temperature field in all battery pack of circular Ni-MH battery, and the integral battery door group the uniformity of ventilation and heat, and simple in structure, easy to operate, manufacturing process is simple, cost is lower.
As seen, the present invention is directed to the needs of hybrid vehicle dynamic property and economy, according to the restriction of the installing space of car load factory and storage battery supplier's structural modification restriction, a kind of scheme of radiator structure of hybrid vehicle Ni-MH battery of more reasonable, optimization is proposed at the internal structure of battery case.
Description of drawings
Fig. 1 is the schematic diagram of the serial draft type of existing Hybrid Vehicle Ni-MH battery group;
Fig. 2 is the schematic diagram of the parallel draft type of existing Hybrid Vehicle Ni-MH battery group;
The Hybrid Vehicle Ni-MH battery group radiator structure figure that Fig. 3 proposes for the present invention;
Fig. 4 is the sectional view of the Hybrid Vehicle Ni-MH battery group cooling system of the present invention's proposition;
Fig. 5 is the figure of the thickness of hybrid vehicle Ni-MH battery bag thermal resistance for the present invention.
Embodiment
According to Figure of description technical scheme of the present invention is described in further detail below.
Figure 3 shows that the Hybrid Vehicle Ni-MH battery group cooling system structure chart that the present invention proposes, this cooling system comprises: the thermal resistance 4 of air inlet 1, support bar 2, air intake conduit 3, battery module and coating, air-out conduit 5, air outlet 6, fan interface 7, cell support frame 8.End at battery case is provided with air inlet 1, and the other end sets out air port 6, and battery pack 4 minutes is upper and lower two-layerly to be arranged in the battery case obliquely.
As shown in Figure 4, the sectional view of the Hybrid Vehicle Ni-MH battery group cooling system that proposes for the present invention, two row's battery pack form the air intake conduit 3 that links to each other with air inlet 1 and the air-out conduit 5 that links to each other with air outlet 6 of wedge shape respectively with the upper and lower inner surface of battery case, described air intake conduit 3 with air inlet 1 connecting place passage internal diameter maximum, along with the extension of air intake conduit, the passage internal diameter reduces gradually; Described air-out conduit 5 with air outlet 6 connecting places, passage internal diameter maximum, air-out conduit 5 is along air outlet 6 directions dorsad, the passage internal diameter reduces gradually; Thermal resistance is also wrapped up in battery pack 4 outsides, in order to reduce battery and extraneous heat exchange, improves local cell temperature, the uniformity that thickness by thermal resistance is set and the spacing between the battery are come regulating cell group temperature field; Battery pack 4 supports by battery support frame 8 and support bar 2, is fixed on the storage battery base plate in the battery case; Blower fan 7 is installed in air outlet 6 places, with cooling air suction air inlet, and the air intake conduit 3 vertical currents surface gap through between circular batteries by the battery pack both sides, flow to air-out conduit 5, after air outlet 6 is discharged, battery pack is played the effect of cooling.
As shown in Figure 5, the numeral in the square frame is the thickness for the coating thermal resistance, and unit is mm.The thin thickness that battery module that wherein radiating condition is good coats a bit, the battery of heat transfer boundary condition difference coats the thick point of thickness of thermal resistance, specifically applies situation as shown in the figure.The thermal physical property parameter of thermal resistance insulation material is as follows: conductive coefficient λ=0.5W/ (m.K), density p=2320kg/m
3, specific heat capacity C
p=1138J/ (kg.K).
Wherein, in the present embodiment of choosing, direct current scavenger fan model is DC12V, and pressure reduction is 230Pa, and rated voltage≤8A is used for the heat radiation of Hybrid Vehicle power battery pack air outlet exhausting;
Present embodiment passes through existing Study of model and analysis, and cooling air begins to cool down battery from import, flows out from outlet again.Self temperature constantly raises in the process of air cooling battery, and each battery strings running fire thermal power much at one, has so just influenced the radiating effect that is arranged near the battery the outlet.Therefore no matter how to finely tune the position of battery and baffle plate, it is low the import battery temperature all can to occur, and the high situation of exit battery temperature.In order to guarantee to have a narrow range of temperature between each battery, consideration is changed into air from two from import to the bottom horizontal flow sheet of outlet and is arranged the perpendicular flow of batteries one side to opposite side.Realize the perpendicular flow of air, will be at passage of each self-forming of both sides about the battery, both sides form certain pressure reduction about making, and battery-arrangements is tight slightly, makes air not flow into the distinguished and admirable road of cell row too early.The battery runner is divided into up runner and descending runner, make air pass through descending runner vertical current as far as possible, flow out from outlet again, like this to up runner, air just can be from battery one effluent to opposite side, has avoided the exit too high temperature of air and influences near the problem of the battery radiating effect outlet.Flow to data feedback channel for what make even air from down going channel, found out a rational battery spacing 30mm and suitable inclination angle 3.5 degree; The interior flow resistance of battery pack is distributed rationally, make Flow Field Distribution even; Thereby reach the purpose that reduces the battery temperature difference.The thermal resistance of the battery surface of present embodiment is in order to guarantee the uniformity of battery surface temperature, increases thermal resistance at the battery surface of the internal structure of above-mentioned design, makes battery and air reduce heat exchange, improves local cell temperature, thereby makes the whole battery group temperature even.The thermal physical property parameter of thermal resistance insulation material is as follows: conductive coefficient λ=0.5W/ (m.K), density p=2320kg/m
3, specific heat capacity C
p=1138J/ (kg.K).
The gas extraction system of present embodiment and exhaust flow-guiding structure system air outlet exhausting, fan starts after receiving enabling signal, cooling air enters air intake conduit 3, by the gap of flowing through between battery pack 4 and battery pack and the battery pack, the heat that battery charge and discharge process produces is taken away, hot blast is pooled to air-out conduit 5, discharges battery housing.
Cooling system also includes the battery pack temperature transducer, described temperature sensor is installed on the battery pack, be used to gather accumulator box internal temperature and ambient temperature that battery pack is installed, and temperature signal transferred to the heat radiating system for battery pack signal processing unit, the heat radiating system for battery pack signal processing unit is according to the contrast of box house temperature and ambient temperature, regulates rising or stopping of blower fan.
Claims (4)
1, a kind of cooling system of Hybrid Vehicle Ni-MH battery group bag thermal resistance, include air inlet (1), support bar (2), air intake conduit (3), battery pack (4), air-out conduit (5), air outlet (6), blower fan (7), cell support frame (8), described battery pack (4) supports by battery support frame (8) and support bar (2), be fixed on the storage battery base plate in the battery case, it is characterized in that:
End at battery case is provided with air inlet (1), the other end sets out air port (6), described battery pack (4) is divided and upper and lowerly two-layerly to be arranged in the battery case obliquely, two-layer battery pack forms the air intake conduit (3) that links to each other with air inlet (1) of wedge shape and the air-out conduit (5) that links to each other with air outlet (6) of wedge shape with the upper and lower inner surface of battery case respectively, described air intake conduit (3) with the passage internal diameter maximum of air inlet (1) connecting place, along with the extension of air intake conduit, the passage internal diameter reduces gradually; Described air-out conduit (5) with the passage internal diameter maximum of air outlet (6) connecting place, air-out conduit (5) is along air outlet (6) direction dorsad, the passage internal diameter reduces gradually; Outside batteries also wraps up thermal resistance, in order to reduce battery and extraneous heat exchange, improves local cell temperature, by according to the thickness of the thermal resistance that radiating condition wraps up of each battery and the uniformity that the spacing between the battery is come regulating cell group temperature field; Blower fan (7) is installed in air outlet (6) and locates, with cooling air suction air inlet, and air intake conduit (3) the vertical current surface gap through between circular batteries by the battery pack both sides, flow to air-out conduit (5),, battery pack is played the effect of cooling after air outlet (6) is discharged.
2, the cooling system of Hybrid Vehicle Ni-MH battery group bag thermal resistance according to claim 1, it is characterized in that: the upper and lower two-layer battery interval of battery pack (4) is installed, be the upper strata battery on the center line between two batteries of adjacent lower floor, lower floor's battery is on the center line between two adjacent upper strata batteries.
3, the cooling system of Hybrid Vehicle Ni-MH battery group bag thermal resistance according to claim 2, it is characterized in that: described cooling system also includes the battery pack temperature transducer, described temperature sensor is installed on the battery pack, be used to gather battery case internal temperature and ambient temperature that battery pack is installed, and temperature signal is transferred to the heat radiating system for battery pack signal processing unit.
4, the cooling system of Hybrid Vehicle Ni-MH battery group bag thermal resistance according to claim 1 and 2, it is characterized in that: the spacing of upper strata battery pack and lower layer battery centreline space is 30mm, angle between the lower surface of described lower layer battery and battery case is 3.5 degree, and the angle between the upper surface of upper strata battery pack and battery case also is 3.5 degree simultaneously; According to the actual radiating condition of battery module the thickness of the thermal resistance of wrapping up is set, the battery that the thickness that the battery module that wherein radiating condition is good coats is thinner than the radiating condition difference coats the thickness of thermal resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100698588A CN101340012A (en) | 2008-06-20 | 2008-06-20 | Heat radiation system of nickel-hydrogen battery set for hybrid power vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100698588A CN101340012A (en) | 2008-06-20 | 2008-06-20 | Heat radiation system of nickel-hydrogen battery set for hybrid power vehicle |
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| CN101340012A true CN101340012A (en) | 2009-01-07 |
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| CNA2008100698588A Pending CN101340012A (en) | 2008-06-20 | 2008-06-20 | Heat radiation system of nickel-hydrogen battery set for hybrid power vehicle |
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Cited By (20)
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| CN102009586A (en) * | 2010-11-29 | 2011-04-13 | 重庆长安汽车股份有限公司 | Mounting structure for power battery pack of electric automobile |
| CN102148413A (en) * | 2011-03-08 | 2011-08-10 | 中信国安盟固利动力科技有限公司 | Temperature controller of vehicle-mounted battery pack |
| CN102544624A (en) * | 2012-01-20 | 2012-07-04 | 重庆长安汽车股份有限公司 | Cooling structure for power battery pack of hybrid electric vehicle |
| CN102694216A (en) * | 2012-05-08 | 2012-09-26 | 上海尧豫实业有限公司 | Nickel-hydrogen battery pack heat management system |
| CN102903875A (en) * | 2012-10-18 | 2013-01-30 | 安徽江淮汽车股份有限公司 | Battery pack of extended-range electric automobile |
| CN102024560B (en) * | 2009-09-15 | 2013-03-27 | 施耐德电器工业公司 | Capacitance box used for heat dissipation of electrolytic capacitance and heat dissipation apparatus using capacitance box |
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| CN106374159A (en) * | 2016-09-14 | 2017-02-01 | 安徽舟之航电池有限公司 | Air-cooled battery pack structure |
| CN106374164A (en) * | 2016-11-14 | 2017-02-01 | 中国科学院广州能源研究所 | Thermal management system with regional air cooling heat dissipation for lithium-ion power battery pack |
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| CN102148413A (en) * | 2011-03-08 | 2011-08-10 | 中信国安盟固利动力科技有限公司 | Temperature controller of vehicle-mounted battery pack |
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| CN106374164B (en) * | 2016-11-14 | 2018-08-17 | 中国科学院广州能源研究所 | A kind of lithium-ion-power cell group heat management system of the air-cooled heat dissipation in subregion |
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| CN107221728A (en) * | 2017-06-29 | 2017-09-29 | 重庆长安汽车股份有限公司 | A kind of 48V systems heat dissipation of lithium battery structure |
| CN107968235A (en) * | 2017-10-20 | 2018-04-27 | 华南理工大学 | A kind of equidistant T-shaped runner air cooling system for power battery pack heat dissipation |
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| CN109927535A (en) * | 2017-12-16 | 2019-06-25 | 郑州宇通客车股份有限公司 | Wind scooper |
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