CN205092298U - Take compound heat abstractor of fin and foam heat conduction structure - Google Patents
Take compound heat abstractor of fin and foam heat conduction structure Download PDFInfo
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- CN205092298U CN205092298U CN201520838019.3U CN201520838019U CN205092298U CN 205092298 U CN205092298 U CN 205092298U CN 201520838019 U CN201520838019 U CN 201520838019U CN 205092298 U CN205092298 U CN 205092298U
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- 239000006260 foam Substances 0.000 title claims abstract description 94
- 150000001875 compounds Chemical class 0.000 title 1
- 239000012782 phase change material Substances 0.000 claims abstract description 43
- 239000002131 composite material Substances 0.000 claims abstract description 42
- 230000017525 heat dissipation Effects 0.000 claims abstract description 27
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 239000012188 paraffin wax Substances 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000000178 monomer Substances 0.000 claims description 2
- 238000005187 foaming Methods 0.000 claims 6
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims 1
- 230000005855 radiation Effects 0.000 claims 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 10
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 10
- 210000004027 cell Anatomy 0.000 description 50
- 238000012546 transfer Methods 0.000 description 15
- 238000001816 cooling Methods 0.000 description 14
- 238000002844 melting Methods 0.000 description 9
- 230000008018 melting Effects 0.000 description 9
- 239000011148 porous material Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 239000006261 foam material Substances 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000006262 metallic foam Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 210000000497 foam cell Anatomy 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
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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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- Secondary Cells (AREA)
Abstract
本实用新型涉及一种带翅片和泡沫导热结构的复合散热装置，用于辅助电池单体(5)的散热，所述的复合散热装置包括套设在电池单体(5)外部的外壳套筒(4)，所述的外壳套筒(4)与电池单体(5)之间填充泡沫结构(2)，泡沫结构(2)内填充满相变材料(1)，所述的外壳套筒(4)与电池单体(5)之间还设有多块隔开泡沫结构(2)的翅片(3)，该翅片(3)的两侧分别紧密贴合外壳套筒(4)与电池单体(5)。与现有技术相比，本实用新型的散热装置能有效降低锂离子电池的温度，预防热失控。
The utility model relates to a composite heat dissipation device with fins and a foam heat conduction structure, which is used for assisting the heat dissipation of a battery cell (5). The barrel (4), the foam structure (2) is filled between the shell sleeve (4) and the battery cell (5), the foam structure (2) is filled with phase change material (1), the shell A plurality of fins (3) separating the foam structure (2) are also provided between the cylinder (4) and the battery cell (5), and the two sides of the fins (3) are closely attached to the shell sleeve (4) respectively. ) and battery cells (5). Compared with the prior art, the heat dissipation device of the utility model can effectively reduce the temperature of the lithium ion battery and prevent thermal runaway.
Description
技术领域technical field
本实用新型涉及锂离子电池散热技术领域，尤其是涉及一种带翅片和泡沫导热结构的复合散热装置。The utility model relates to the technical field of heat dissipation of lithium ion batteries, in particular to a composite heat dissipation device with fins and a foam heat conduction structure.
背景技术Background technique
汽车动力电池如锂离子电池能量密度高，体积小，循环寿命较长，在电动汽车上应用潜力很大。然而由于锂离子电池在充放电过程中温度升高影响自身性能与循环寿命，过高的温度甚至引起热失控，导致自燃等事故，因此动力锂离子电池散热技术的研究和实施尤为迫切。散热系统通常采取风冷或液体冷却。风冷散热系统体积小，但是散热效果有限，而液体冷却系统效果较好，但是体积大，结构复杂、泵功能耗高，且存在泄漏等潜在缺点。而相变材料具有相变过程吸收潜热高、温升小、化学稳定性好、体积小、结构简单、价格低廉等优点，应用在动力锂离子电池上能降低电池温升、缓和热冲击，提高电池寿命和稳定性。但是相变材料导热率低，不能迅速、均匀地传热。Automotive power batteries such as lithium-ion batteries have high energy density, small size, and long cycle life, so they have great potential for application in electric vehicles. However, since the temperature rise of lithium-ion batteries during the charging and discharging process affects their performance and cycle life, too high temperature may even cause thermal runaway, leading to accidents such as spontaneous combustion, so the research and implementation of power lithium-ion battery heat dissipation technology is particularly urgent. Cooling systems are usually air-cooled or liquid-cooled. The air-cooled heat dissipation system is small in size, but has limited heat dissipation effect, while the liquid cooling system has better effect, but has large volume, complex structure, high pump function consumption, and potential disadvantages such as leakage. The phase change material has the advantages of high latent heat absorption during the phase change process, small temperature rise, good chemical stability, small size, simple structure, and low price. It can reduce the temperature rise of the battery, ease the thermal shock, and improve the performance of lithium-ion batteries when applied to power lithium-ion batteries. Battery life and stability. However, phase change materials have low thermal conductivity and cannot transfer heat quickly and uniformly.
中国专利200910039125.4公开了一种带有相变材料冷却系统的动力电池装置，该装置包括螺钉、若干电池单体、箱盖通风孔、电极连接轴、箱体顶盖、侧面通风孔、框体；所述的电池单体是以电池作为基体，外部加装壳体；电池和壳体之间填充相变材料并采用绝缘橡胶密封；电池箱体开设通风孔散热。该专利通过填充相变材料虽然有效的缓和了电池发热冲击，但是没有解决相变材料导热率低而导致散热速度慢的缺点。Chinese patent 200910039125.4 discloses a power battery device with a phase change material cooling system, which includes screws, several battery cells, vent holes in the case cover, electrode connecting shafts, top cover of the case body, side vent holes, and a frame; The battery cell is based on the battery, and a shell is installed on the outside; the phase change material is filled between the battery and the shell and sealed with insulating rubber; the battery box is provided with ventilation holes to dissipate heat. Although this patent effectively alleviates the thermal impact of the battery by filling the phase change material, it does not solve the shortcoming of slow heat dissipation caused by the low thermal conductivity of the phase change material.
中国专利ZL201120571466.9公开了一种基于泡沫金属/复合相变材料的动力电池冷却系统，包括有单体电池、电池连接极、相变材料、泡沫金属、高导热绝缘胶、电池外壳、电池上档板、电池下档板；单体电池与电池外壳之间填充有以泡沫金属为骨架材料和以相变材料为基体复合而成的复合相变材料，相变材料灌注到泡沫金属中，单体电池与灌注后的泡沫金属用高导热绝缘胶连接，电池上档板及电池下档板分别装设在单体电池的上端及下端，电池连接极与单体电池连接。该专利的泡沫金属与电池的有效接触面积小，并且没有减小接触界面空气缝隙机制，从而导致其传热效果强化不充分。Chinese patent ZL201120571466.9 discloses a power battery cooling system based on foamed metal/composite phase change material, including single battery, battery connecting pole, phase change material, foamed metal, high thermal conductivity insulating glue, battery case, battery baffle plate, battery lower baffle plate; between the single battery and the battery case, a composite phase change material is filled with foam metal as the skeleton material and phase change material as the matrix. The phase change material is poured into the foam metal, and the single The body battery is connected to the poured foam metal with high thermal conductivity insulating glue, the upper battery baffle and the lower battery baffle are respectively installed on the upper end and the lower end of the single battery, and the battery connecting pole is connected to the single battery. The effective contact area between the metal foam and the battery in this patent is small, and there is no mechanism to reduce the air gap at the contact interface, which leads to insufficient enhancement of its heat transfer effect.
实用新型内容Utility model content
本实用新型的目的就是为了克服上述现有技术存在的缺陷而提供一种带翅片和泡沫导热结构的复合散热装置。The purpose of this utility model is to provide a composite cooling device with fins and foam heat conduction structure in order to overcome the above-mentioned defects in the prior art.
本实用新型的目的可以通过以下技术方案来实现：The purpose of this utility model can be achieved through the following technical solutions:
一种带翅片和泡沫导热结构的复合散热装置，用于辅助电池单体的散热，所述的复合散热装置包括套设在电池单体外部的外壳套筒，所述的外壳套筒与电池单体之间填充泡沫结构，所述的泡沫结构由大量的随机排列、结构相似单元组成，每个单元包括加强筋、交叉部位和开口孔洞，泡沫结构开口孔洞内填充满相变材料，所述的外壳套筒与电池单体之间还设有多块隔开泡沫结构的翅片以强化传热，该翅片的两侧分别紧密贴合外壳套筒与电池单体。A composite heat sink with fins and a foam heat conduction structure, used to assist the heat dissipation of the battery cell, the composite heat sink includes a shell sleeve sleeved outside the battery cell, the shell sleeve and the battery A foam structure is filled between the monomers. The foam structure is composed of a large number of randomly arranged and similarly structured units. Each unit includes reinforcing ribs, intersections and open holes. The opening holes of the foam structure are filled with phase change materials. The said There are also multiple fins separating the foam structure between the shell sleeve and the battery cell to enhance heat transfer, and the two sides of the fin are closely attached to the shell sleeve and the battery cell.
所述的泡沫结构的高度与电池单体高度相仿，厚度为2～7mm。The height of the foam structure is similar to that of a battery cell, and the thickness is 2-7mm.
所述的泡沫结构为孔密度为10～100PPI、孔隙率为70～99％的多孔型的泡沫铜结构、泡沫铝结构、泡沫石墨结构或泡沫陶瓷结构。孔隙率和孔密度作为泡沫结构的主要表征参数，孔隙率影响复合材料的导热率，不同孔隙率下的导热率可由以下公式计算(引用自V.V.CalmidiandR.L.Mahajan，TheEffectiveThermalConductivityofHighPorosityFibrousMetalFoams，ASMEJ.HeatTransfer,Vol.121,pp.466-471,1999)，即：The foam structure is a porous copper foam structure, aluminum foam structure, graphite foam structure or ceramic foam structure with a pore density of 10-100PPI and a porosity of 70-99%. Porosity and pore density are the main characterization parameters of the foam structure, and the porosity affects the thermal conductivity of the composite material. The thermal conductivity under different porosities can be calculated by the following formula (quoted from V.V.Calmidian and R.L.Mahajan, TheEffectiveThermalConductivityofHighPorosityFibrousMetalFoams, ASMEJ.HeatTransfer, Vol .121, pp.466-471, 1999), namely:
其中，ke为有效导热率，ε是孔隙率，r是金属加强筋厚度与交叉部位尺寸之比，一般取0.09，ks为固体导热率，kf为相变材料导热率。b/L为交叉部位尺寸和泡沫结构单元尺寸比值，由下面公式求得：Among them, k e is the effective thermal conductivity, ε is the porosity, r is the ratio of the thickness of the metal rib to the size of the intersection, generally 0.09, k s is the solid thermal conductivity, and k f is the thermal conductivity of the phase change material. b/L is the ratio of the size of the intersection part to the size of the foam structure unit, which is obtained by the following formula:
具体计算结果如图5所示，由上述公式可知，孔隙率越低，复合材料导热率越高，但相变材料体积分数下降，潜热吸热能力下降，较为合适的孔隙率在70～99％之间。泡沫结构由大量的随机排列但结构相似单元组成，每个单元包括加强筋、交叉部位和开口孔洞。开口孔洞结构尺寸常用孔密度表示，多个开口孔洞结构形成具有一定结构强度的泡沫体，实施当中，孔洞的结构尺寸在0.2～2mm之间，即孔密度为10-100PPI，可以填充电池组之间的空间并保持一定的结构强度。孔洞尺寸太大接近材料尺寸则强度太小，孔洞尺寸太小则泡沫结构加工困难，成本较高。The specific calculation results are shown in Figure 5. From the above formula, it can be seen that the lower the porosity, the higher the thermal conductivity of the composite material, but the volume fraction of phase change material decreases, and the latent heat absorption capacity decreases. The more suitable porosity is 70-99%. between. The foam structure is composed of a large number of randomly arranged but structurally similar units, each unit includes ribs, intersections and open holes. The size of the open hole structure is usually expressed by the hole density. Multiple open hole structures form a foam with a certain structural strength. The space between and maintain a certain structural strength. If the pore size is too large and close to the material size, the strength will be too small. If the pore size is too small, the foam structure will be difficult to process and the cost will be higher.
所述的相变材料的熔点为30～80℃，与电池单体的理想工作温度范围相一致，相变材料的添加量保证其熔化时，能使电池单体、泡沫结构和翅片整体浸没，相变材料和泡沫材料可采用柔性袋子容纳，避免溶融的液态相变材料流淌。The melting point of the phase-change material is 30-80°C, which is consistent with the ideal working temperature range of the battery cell. The amount of the phase-change material added ensures that the battery cell, foam structure and fins can be immersed as a whole when it melts. , The phase change material and the foam material can be accommodated in a flexible bag to prevent the molten liquid phase change material from flowing.
所述的相变材料为石蜡。The phase change material is paraffin.
所述的翅片为矩形翅片，其高度与电池单体高度相仿，厚度为0.1～1.5mm。The fins are rectangular fins, the height of which is similar to that of the battery cell, and the thickness is 0.1-1.5mm.
所述的翅片为铝制翅片、铜制翅片或其它高导热材料制翅片。The fins are aluminum fins, copper fins or fins made of other high thermal conductivity materials.
所述的外壳套筒为铝制套筒、铜制套筒或其它高导热材料制套筒。The casing sleeve is made of aluminum sleeve, copper sleeve or other high thermal conductivity material.
所述的外壳套筒与泡沫结构之间还设有楔形插片，由于加工误差，泡沫结构和电池等产热体之间总会有空气间隙，进一步加大接触热阻。为了确保泡沫结构紧密贴合产热部件，避免较大的空隙分层和额外的接触热阻，在外部套筒和泡沫结构之间插入楔形插片，楔形插片材料可以是金属、塑料、电木等容易加工、低成本的薄片。There is also a wedge-shaped insert between the shell sleeve and the foam structure. Due to processing errors, there will always be an air gap between the foam structure and heat-generating bodies such as batteries, which further increases the contact thermal resistance. In order to ensure that the foam structure closely fits the heat-generating parts and avoids large gap delamination and additional contact thermal resistance, a wedge-shaped insert is inserted between the outer sleeve and the foam structure. The material of the wedge-shaped insert can be metal, plastic, electric Easy-to-process and low-cost thin sheets such as wood.
所述的外壳套筒内设有多个电池单体，所述的外壳套筒与电池单体之间填充泡沫结构，该泡沫结构中间通过多块翅片隔开，所述的翅片的两侧分别紧密贴合外壳套筒和电池单体或相邻的两电池单体。A plurality of battery cells are arranged in the shell sleeve, and a foam structure is filled between the shell sleeve and the battery cells, and the middle of the foam structure is separated by a plurality of fins. The sides are closely fitted to the casing sleeve and the battery cell or two adjacent battery cells.
本实用新型通过采用泡沫结构复合相变材料进行传热，相变材料在相变过程中吸热而使电池最高温度保持在相变熔点附近，降低了电池温升，缓和热冲击的优点，同时，泡沫结构采用孔密度为10～100PPI、孔隙率70～99％的通孔型泡沫材料，改善了石蜡导热系数低、传热不均匀的缺点。此外，在电池单体壁面与外壳套筒之间还设有采用高导热材料制成的翅片，翅片设置在相邻半环状的泡沫结构之间的槽缝中，并分别紧密贴合外壳套筒与电池单体，从而增加了电池单体与泡沫结构之间的换热面积，当电池发热时，热量可以经由电池外壳、通过翅片迅速传至泡沫结构，并通过泡沫结构向相变材料传递热量，相变材料吸收热能，提高了换热效率，克服了单纯的泡沫结构复合相变材料因泡沫结构与电池单体之间孔隙度大、有效换热面积小、接触热阻大的缺点。已有研究表明(T.Fiedler,N.White,M.Dahari,K.Hooman,Ontheelectricalandthermalcontactresistanceofmetalfoam,InternationalJournalofHeatandMassTransferVol.72(2014)pp.565–571。)，泡沫材料的界面接触热阻可以达到甚至明显超过本体泡沫材料的热阻，如果接触面积小，会导致传热效果不理想。本实用新型在实际应用时，针对不同的电池输出功率要求，还可以通过在外壳套筒内设置多个电池单体组成电池包。The utility model conducts heat transfer by adopting a foam structure composite phase change material, and the phase change material absorbs heat during the phase change process so that the maximum temperature of the battery is kept near the melting point of the phase change, which reduces the temperature rise of the battery and eases the advantages of thermal shock, and at the same time , The foam structure adopts a through-hole foam material with a hole density of 10-100PPI and a porosity of 70-99%, which improves the shortcomings of low thermal conductivity and uneven heat transfer of paraffin wax. In addition, there are fins made of high thermal conductivity material between the wall of the battery cell and the casing sleeve, and the fins are arranged in the slots between adjacent semi-annular foam structures, and are closely fitted to each other. The shell sleeve and the battery cell increase the heat exchange area between the battery cell and the foam structure. When the battery heats up, the heat can be quickly transferred to the foam structure through the battery shell and through the fins, and then to the phase through the foam structure. The heat transfer material transfers heat, and the phase change material absorbs heat energy, which improves the heat exchange efficiency and overcomes the large porosity between the foam structure and the battery cell, the small effective heat exchange area, and the large contact thermal resistance of the simple foam structure composite phase change material. Shortcomings. Studies have shown (T. Fiedler, N. White, M. Dahari, K. Hooman, On the electrical and thermal contact resistance of metal foam, International Journal of Heat and Mass Transfer Vol. 72 (2014) pp. 565–571.), the interface thermal resistance of foam materials can reach or even significantly exceed the body The thermal resistance of the foam material, if the contact area is small, will result in unsatisfactory heat transfer. When the utility model is actually applied, according to different battery output power requirements, a plurality of battery cells can be arranged in the shell sleeve to form a battery pack.
与现有技术相比，本实用新型的复合散热装置以泡沫结构为骨架，泡沫结构内部填充相变材料，并设有强化传热的翅片，具有接触热阻小、轻质、紧凑、便于加工和热控性好等优点，同时，复合散热装置工作时，较一般的散热装置而言，温度分布更均匀，换热效率更高。Compared with the prior art, the composite cooling device of the utility model has a foam structure as the skeleton, and the inside of the foam structure is filled with phase-change materials, and is provided with fins for enhancing heat transfer. It has the advantages of good processing and thermal control. At the same time, when the composite heat sink is working, the temperature distribution is more uniform and the heat exchange efficiency is higher than that of the general heat sink.
附图说明Description of drawings
图1为本实用新型的复合散热装置的结构示意图；Fig. 1 is the structural representation of the composite cooling device of the present utility model;
图2为本实用新型的复合散热装置的A-A剖视结构示意图；Fig. 2 is the A-A cross-sectional structural schematic diagram of the composite cooling device of the present invention;
图3为本实用新型的复合散热装置的B-B剖视结构示意图；Fig. 3 is the B-B cross-sectional structure schematic diagram of composite cooling device of the present utility model;
图4为本实用新型的复合散热装置组合制成的电池包的结构示意图；Fig. 4 is a structural schematic diagram of a battery pack made of a combination of the composite cooling device of the present invention;
图5为本实用新型的不同孔隙率的泡沫结构与导热率的关系图；Fig. 5 is the relation figure of the foam structure and thermal conductivity of the different porosity of the present utility model;
图中，1-相变材料，2-泡沫结构，3-翅片，4-外壳套筒，5-电池单体，6-楔形插片。In the figure, 1-phase change material, 2-foam structure, 3-fin, 4-housing sleeve, 5-battery unit, 6-wedge insert.
具体实施方式detailed description
下面结合附图和具体实施例对本实用新型进行详细说明。The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
实施例1Example 1
一种带翅片和泡沫导热结构的复合散热装置，用于辅助电池单体5的散热，其结构如图1、图2和图3所示，复合散热装置包括套设在电池单体5外部的外壳套筒4，外壳套筒4为铝制套筒，外壳套筒4与电池单体5之间填充泡沫结构2，泡沫结构2的高度与电池单体5高度相仿，高度为60mm，厚度为2mm，泡沫结构2为孔密度为10PPI、孔隙率为70％的多孔型的泡沫铜结构，泡沫结构2内填充满熔点为30～33℃的相变材料1，相变材料1为石蜡，外壳套筒4与电池单体5之间还设有四块隔开泡沫结构2的翅片3以强化传热，翅片3为铝制矩形翅片，其高度与电池单体5高度相仿，高度为60mm，厚度为0.3mm，翅片3的两侧分别紧密贴合外壳套筒4与电池单体5，外壳套筒4与泡沫结构2之间还设有楔形插片6。A composite heat sink with fins and a foam heat conduction structure, used to assist the heat dissipation of the battery cell 5, its structure is shown in Figure 1, Figure 2 and Figure 3, the composite heat sink includes a set on the outside of the battery cell 5 The shell sleeve 4 is an aluminum sleeve, and the foam structure 2 is filled between the shell sleeve 4 and the battery cell 5. The height of the foam structure 2 is similar to that of the battery cell 5, with a height of 60mm and a thickness of The foam structure 2 is a porous copper foam structure with a pore density of 10PPI and a porosity of 70%. The foam structure 2 is filled with a phase-change material 1 with a melting point of 30-33°C. The phase-change material 1 is paraffin. There are four fins 3 separating the foam structure 2 between the casing sleeve 4 and the battery cell 5 to enhance heat transfer. The fins 3 are aluminum rectangular fins whose height is similar to that of the battery cell 5 . The height is 60 mm and the thickness is 0.3 mm. The two sides of the fin 3 are closely attached to the shell sleeve 4 and the battery cell 5 respectively, and a wedge-shaped insert 6 is provided between the shell sleeve 4 and the foam structure 2 .
实施例2Example 2
一种带翅片和泡沫导热结构的复合散热装置，用于辅助电池单体5的散热，复合散热装置包括套设在电池单体5外部的外壳套筒4，外壳套筒4为铜制套筒，外壳套筒4与电池单体5之间填充泡沫结构2，泡沫结构2的高度与电池单体5高度相仿，高度为100mm，厚度为7mm，泡沫结构2为孔密度为100PPI、孔隙率为99％的多孔型的泡沫铝结构，泡沫结构2内填充满熔点为45～48℃的相变材料1，相变材料1为石蜡，外壳套筒4与电池单体5之间还设有四块隔开泡沫结构2的翅片3以强化传热，翅片3为铜制矩形翅片，其高度与电池单体5高度相仿，高度为100mm，厚度为1.5mm，翅片3的两侧分别紧密贴合外壳套筒4与电池单体5，外壳套筒4与泡沫结构2之间还设有楔形插片6。A composite cooling device with fins and a foam heat conduction structure, used to assist the heat dissipation of the battery cell 5. The composite cooling device includes a casing sleeve 4 sleeved outside the battery cell 5, and the casing sleeve 4 is a copper sleeve. The foam structure 2 is filled between the casing sleeve 4 and the battery cell 5. The height of the foam structure 2 is similar to that of the battery cell 5, with a height of 100mm and a thickness of 7mm. The foam structure 2 has a pore density of 100PPI and a porosity of It is a 99% porous aluminum foam structure. The foam structure 2 is filled with a phase change material 1 with a melting point of 45-48°C. The phase change material 1 is paraffin. Four fins 3 separating the foam structure 2 enhance heat transfer. The fins 3 are copper rectangular fins whose height is similar to that of the battery cell 5, with a height of 100 mm and a thickness of 1.5 mm. The sides are closely attached to the shell sleeve 4 and the battery cell 5 respectively, and a wedge-shaped insert 6 is also provided between the shell sleeve 4 and the foam structure 2 .
实施例3Example 3
一种带翅片和泡沫导热结构的复合散热装置，用于辅助电池单体5的散热，复合散热装置包括套设在电池单体5外部的外壳套筒4，外壳套筒4为铝制套筒，外壳套筒4与电池单体5之间填充泡沫结构2，泡沫结构2的高度与电池单体5高度相仿，高度为80mm，厚度为4mm，泡沫结构2为孔密度为60PPI、孔隙率为85％的多孔型的泡沫石墨结构，泡沫结构2内填充满熔点为78～80℃的相变材料1，相变材料1为石蜡，外壳套筒4与电池单体5之间还设有四块隔开泡沫结构2的翅片3以强化传热，翅片3为铝制矩形翅片，其高度与电池单体5高度相仿，高度为80mm，厚度为0.9mm，翅片3的两侧分别紧密贴合外壳套筒4与电池单体5，外壳套筒4与泡沫结构2之间还设有楔形插片6。A composite heat sink with fins and a foam heat conduction structure, used to assist the heat dissipation of the battery cell 5, the composite heat sink includes a casing sleeve 4 set outside the battery cell 5, the casing sleeve 4 is an aluminum sleeve The foam structure 2 is filled between the casing sleeve 4 and the battery cell 5. The height of the foam structure 2 is similar to that of the battery cell 5, with a height of 80mm and a thickness of 4mm. The foam structure 2 has a pore density of 60PPI and a porosity of It is an 85% porous graphite foam structure. The foam structure 2 is filled with a phase change material 1 with a melting point of 78-80°C. The phase change material 1 is paraffin. Four fins 3 separating the foam structure 2 enhance heat transfer. The fins 3 are aluminum rectangular fins whose height is similar to that of the battery cell 5, with a height of 80mm and a thickness of 0.9mm. The two sides of the fins 3 The sides are closely attached to the shell sleeve 4 and the battery cell 5 respectively, and a wedge-shaped insert 6 is also provided between the shell sleeve 4 and the foam structure 2 .
实施例4Example 4
一种带翅片和泡沫导热结构的复合散热装置，用于辅助电池单体5的散热，复合散热装置包括套设在电池单体5外部的外壳套筒4，外壳套筒4为铝制套筒，外壳套筒4与电池单体5之间填充泡沫结构2，泡沫结构2的高度与电池单体5高度相仿，高度为70mm，厚度为3mm，泡沫结构2为孔密度为40PPI、孔隙率为80％的多孔型的泡沫陶瓷结构，泡沫结构2内填充满熔点为68～71℃的相变材料1，相变材料1为石蜡，外壳套筒4与电池单体5之间还设有四块隔开泡沫结构2的翅片3以强化传热，翅片3为铝制矩形翅片，其高度与电池单体5高度相仿，高度为70mm，厚度为0.8mm，翅片3的两侧分别紧密贴合外壳套筒4与电池单体5，外壳套筒4与泡沫结构2之间还设有楔形插片6。A composite heat sink with fins and a foam heat conduction structure, used to assist the heat dissipation of the battery cell 5, the composite heat sink includes a casing sleeve 4 set outside the battery cell 5, the casing sleeve 4 is an aluminum sleeve The foam structure 2 is filled between the casing sleeve 4 and the battery cell 5. The height of the foam structure 2 is similar to that of the battery cell 5, with a height of 70mm and a thickness of 3mm. The foam structure 2 has a pore density of 40PPI and a porosity of It is an 80% porous ceramic foam structure. The foam structure 2 is filled with a phase-change material 1 with a melting point of 68-71°C. The phase-change material 1 is paraffin. Four fins 3 separating the foam structure 2 are used to enhance heat transfer. The fins 3 are aluminum rectangular fins whose height is similar to that of the battery cell 5, with a height of 70mm and a thickness of 0.8mm. The two sides of the fins 3 The sides are closely attached to the shell sleeve 4 and the battery cell 5 respectively, and a wedge-shaped insert 6 is also provided between the shell sleeve 4 and the foam structure 2 .
实施例5Example 5
一种带翅片和泡沫导热结构的复合散热装置，用于辅助电池单体5的散热，其结构如图4所示，复合散热装置包括外壳套筒4，外壳套筒4为铝制套筒，外壳套筒4内设有六个电池单体5，外壳套筒4与电池单体5之间填充泡沫结构2，泡沫结构2的高度与电池单体5相仿，高度为70mm，厚度为3mm，泡沫结构2为孔密度为40PPI、孔隙率为80％的多孔型的泡沫铜结构，泡沫结构2内填充满熔点为35～37℃的相变材料1，相变材料1为石蜡，外壳套筒4与电池单体5、相邻两电池单体5之间设有翅片3以强化传热，翅片3为铝制矩形翅片，其高度与电池单体5高度相仿，高度为70mm，厚度为0.8mm。A composite cooling device with fins and foam heat conduction structure, which is used to assist the heat dissipation of the battery cell 5. Its structure is shown in Figure 4. The composite cooling device includes a shell sleeve 4, which is an aluminum sleeve , there are six battery cells 5 inside the shell sleeve 4, the foam structure 2 is filled between the shell sleeve 4 and the battery cells 5, the height of the foam structure 2 is similar to that of the battery cells 5, the height is 70mm, and the thickness is 3mm , the foam structure 2 is a porous copper foam structure with a pore density of 40PPI and a porosity of 80%. The foam structure 2 is filled with a phase-change material 1 with a melting point of 35-37°C. The phase-change material 1 is paraffin. There are fins 3 between the tube 4 and the battery cells 5, and between two adjacent battery cells 5 to enhance heat transfer. The fins 3 are aluminum rectangular fins, and their height is similar to that of the battery cells 5, with a height of 70mm. , the thickness is 0.8mm.
实施例6Example 6
将实施例1制得的复合散热装置，以及分别只加相变材料和加泡沫结构和相变材料的一般散热装置进行性能测试。Performance tests were performed on the composite heat sink prepared in Example 1, and general heat sinks with only phase change materials added and foam structures and phase change materials added, respectively.
其步骤如下：The steps are as follows:
分别将复合散热装置、一般散热装置与锂离子电池形状相同的铝制圆柱型加热体(以下称模拟电池)组合，其中，模拟电池一端开槽放入加热器，加热器加热功率由直流电源控制，以模拟真实电池温升规律。K型热电偶分别设置在外壳套筒、模拟电池的壁面测温。相变材料选用熔点为51-53℃的石蜡25g，预先熔化后将其装入在外壳套筒内。调节加热器功率为6.6W、8.8W来模拟锂离子电池高倍率放电发热情况，温度数据通过专用的数据采集仪实时测量。待外壳套筒温度升至相变材料熔点即53℃时石蜡全部溶化，记录的模拟电池壁面温度如下表1所示。Combine the composite heat sink, the general heat sink, and the aluminum cylindrical heating body (hereinafter referred to as the simulated battery) with the same shape as the lithium-ion battery. One end of the simulated battery is slotted into the heater, and the heating power of the heater is controlled by a DC power supply. , to simulate the law of real battery temperature rise. K-type thermocouples are respectively installed on the casing sleeve and the wall surface of the simulated battery for temperature measurement. As the phase change material, 25g of paraffin wax with a melting point of 51-53°C is selected, which is pre-melted and put into the shell sleeve. Adjust the power of the heater to 6.6W and 8.8W to simulate the high-rate discharge heating of the lithium-ion battery, and the temperature data is measured in real time by a dedicated data acquisition instrument. When the temperature of the shell sleeve rises to the melting point of the phase change material, that is, 53°C, the paraffin is completely melted, and the recorded wall temperature of the simulated battery is shown in Table 1 below.
表1Table 1
通过以上实验对比，本实用新型实施例1制得的复合散热装置较以往只加相变材料，或泡沫结构+相变材料的一般散热装置而言，复合散热装置的温度更低，这说明本实用新型的复合散热装置散热性能更为优异，能有效降低锂离子电池的温度，预防热失控。Through the comparison of the above experiments, the composite heat sink made in Example 1 of the utility model has a lower temperature than the general heat sink with phase change material or foam structure+phase change material, which shows that the composite heat sink is lower. The utility model composite heat dissipation device has better heat dissipation performance, can effectively reduce the temperature of lithium-ion batteries, and prevent thermal runaway.
上述的对实施例的描述是为便于该技术领域的普通技术人员能理解和使用实用新型。熟悉本领域技术的人员显然可以容易地对这些实施例做出各种修改，并把在此说明的一般原理应用到其他实施例中而不必经过创造性的劳动。因此，本实用新型不限于上述实施例，本领域技术人员根据本实用新型的揭示，不脱离本实用新型范畴所做出的改进和修改都应该在本实用新型的保护范围之内。The above description of the embodiments is for those of ordinary skill in the technical field to understand and use the utility model. It is obvious that those skilled in the art can easily make various modifications to these embodiments, and apply the general principles described here to other embodiments without creative efforts. Therefore, the utility model is not limited to the above-mentioned embodiments, and improvements and modifications made by those skilled in the art according to the disclosure of the utility model without departing from the category of the utility model should be within the protection scope of the utility model.
Claims (9)
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| CN109825253A (en) * | 2019-01-30 | 2019-05-31 | 深装总建设集团股份有限公司 | Phase-change energy-storage units module and its preparation method and application |
| CN110994073A (en) * | 2019-12-23 | 2020-04-10 | 武汉理工大学 | Temperature management system for hybrid lithium battery |
| CN111022385A (en) * | 2019-11-04 | 2020-04-17 | 浙江大学 | Ocean temperature difference energy capture heat engine and its manufacturing method and ocean profile motion platform |
| CN116646638A (en) * | 2022-10-13 | 2023-08-25 | 西北工业大学 | A light-weight heat dissipation device for battery packs in a small, confined, and limited space |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105356004A (en) * | 2015-10-27 | 2016-02-24 | 上海工程技术大学 | Combined heat dissipating device provided with fins and foam heat conduction structure |
| CN106783195A (en) * | 2015-11-23 | 2017-05-31 | 常州中科绿色科技产业园管理有限公司 | A kind of radiating seat and its preparation technology |
| CN109825253A (en) * | 2019-01-30 | 2019-05-31 | 深装总建设集团股份有限公司 | Phase-change energy-storage units module and its preparation method and application |
| CN111022385A (en) * | 2019-11-04 | 2020-04-17 | 浙江大学 | Ocean temperature difference energy capture heat engine and its manufacturing method and ocean profile motion platform |
| CN111022385B (en) * | 2019-11-04 | 2021-04-27 | 浙江大学 | Ocean temperature difference energy capture heat engine and its manufacturing method and ocean profile motion platform |
| CN110994073A (en) * | 2019-12-23 | 2020-04-10 | 武汉理工大学 | Temperature management system for hybrid lithium battery |
| CN116646638A (en) * | 2022-10-13 | 2023-08-25 | 西北工业大学 | A light-weight heat dissipation device for battery packs in a small, confined, and limited space |
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Granted publication date: 20160316 |