WO2017000747A1 - 冷却板、锂离子电池模组及汽车 - Google Patents

冷却板、锂离子电池模组及汽车 Download PDF

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Publication number
WO2017000747A1
WO2017000747A1 PCT/CN2016/084739 CN2016084739W WO2017000747A1 WO 2017000747 A1 WO2017000747 A1 WO 2017000747A1 CN 2016084739 W CN2016084739 W CN 2016084739W WO 2017000747 A1 WO2017000747 A1 WO 2017000747A1
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WO
WIPO (PCT)
Prior art keywords
heat
cooling
cooling plate
heat conducting
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2016/084739
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English (en)
French (fr)
Inventor
郑卫鑫
曾毅
朱建华
朱燕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BYD Co Ltd
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BYD Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201510372725.8A external-priority patent/CN106329029A/zh
Priority claimed from CN201520461120.1U external-priority patent/CN204809361U/zh
Application filed by BYD Co Ltd filed Critical BYD Co Ltd
Publication of WO2017000747A1 publication Critical patent/WO2017000747A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6554—Rods or plates
    • 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
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • 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
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • 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

Definitions

  • the invention relates to the field of cooling and heat dissipation of a lithium ion battery module, and mainly relates to a cooling plate and a lithium ion battery module including the same.
  • Lithium ion secondary batteries have become the main power source for portable electronic devices because of their advantages of light weight, small size, no pollution, low internal pressure, and low cost.
  • a large amount of heat is generated inside the battery module. If the heat is not dissipated in time, it will have a great impact on the performance of the battery module, especially the safety performance.
  • the internal heat can be dissipated in time during the use of the battery module or in extreme cases, which is a key research in the production and use of the power battery. direction.
  • the cooling plate 1 includes an upper metal plate 11 and a lower metal plate 12, and at least one of the upper metal plate 11 or the lower metal plate 12 is provided with a cooling groove 21 (as shown in FIG. 2).
  • a cooling groove 21) is provided on the lower metal plate 12, and then the upper metal plate 11 and the lower metal plate 12 are fixedly joined by brazing, and the cooling groove 21 is sealed to the upper metal plate 11 and the lower metal plate 12 Between, a sealed cooling passage is formed for the coolant to flow.
  • the inlet and outlet of the cooling passage require an external pipe and a welding seal is required.
  • the brazing joint between the upper metal plate 11 and the lower metal plate 12 is too long, and the cooling passage is also welded between the inlet and the outlet, and the welded portion is easily circulated and cooled during use.
  • the coolant in the passage is corroded, which causes leakage problems. Therefore, in the above solution, the life of the cooling plate is limited. In addition, it is prone to liquid leakage after being corroded, causing liquid to flow into the battery module, which is easy to damage the battery module and reduce the service life of the battery module; and, leakage will not only cause poor heat dissipation, but also Affect the safety performance of the battery module.
  • the upper metal plate 11 and the lower metal plate 12 are metal plates, and in the manufacturing process, The surface of the insulating layer is sprayed with an insulating layer. If the insulating layer has insufficient withstand voltage and is easy to fall off, the insulating effect is not good, which may affect the safety performance of the power battery module.
  • the present invention aims to solve the above technical problems at least to some extent.
  • An object of the present invention is to provide a cooling plate in which the cooling pipe and the cooling plate are not easily corroded and does not leak; and the heat conducting plate has good insulation performance and high safety performance.
  • the present invention provides a cooling plate including a heat conducting plate and a cooling pipe, the cooling pipe including a heat dissipating portion and an inlet portion at one end of the heat dissipating portion and an outlet portion at the other end of the heat dissipating portion, the heat dissipating
  • the heat conducting plate is an injection molded plate body, and the heat dissipating portion is embedded in the heat conducting plate by injection molding of the heat conducting plate.
  • the cooling plate provided by the invention has a heat dissipating portion located in the heat conducting plate as an integrated pipe.
  • the cooling liquid flows in the cooling pipe of the cooling plate. Since the heat dissipating part of the cooling pipe is an integrated pipe, there is no welding edge, and the cooling liquid does not contact the welding brazing material, and the cooling pipe does not affect the sealing performance or the appearance of the solder due to corrosion of the solder. In the case of liquid leakage, the cooling pipe has high corrosion resistance and high sealing reliability. At the same time, the possibility of liquid leakage is reduced, the service life of the cooling plate is improved, and the safety performance of the battery is not adversely affected by the leakage, and the battery module using the cooling plate has high safety performance.
  • the heat conducting plate is a plate body which is injection molded outside the heat radiating portion, and has high pressure resistance and insulation performance, and improves the safety performance of the power battery module using the cooling plate.
  • the heat dissipating portion, the inlet portion and the outlet portion are integrally formed pipes.
  • the heat conducting plate is integrally injection molded.
  • the heat dissipating portion is a flat tube.
  • the heat dissipating portion is formed by flattening a circular tube.
  • the heat conducting plate is a flat plate.
  • the heat dissipating portion is bent a plurality of times in the heat conducting plate.
  • the heat dissipating portion has a U shape or a W shape.
  • the nozzle of the heat dissipating portion is elliptical or rectangular.
  • the ratio of the width of the heat dissipating portion to the diameter of the flat tube before crushing is 1.2-2.
  • the ratio of the width of the heat dissipating portion to the diameter of the flat tube before crushing is 1.4 to 1.8.
  • the outer side wall of the heat dissipating portion is provided with a convex portion, and the convex portion is embedded in the heat conducting plate.
  • the top end of the convex portion is flush with the outer surface of the heat conducting plate.
  • the heat conducting plate is injection molded from an insulating heat conductive material.
  • Another object of the present invention is to provide a lithium ion battery module, wherein the lithium ion battery module is provided A cooling plate is provided, which is a cooling plate provided by the present invention.
  • the lithium ion battery module provided by the invention does not leak or affect the safety performance of the cooling pipe in the cooling plate, the cooling plate has high sealing reliability and corrosion resistance, and the heat conducting plate can It has good insulation effect and high safety performance.
  • Another object of the present invention is to provide an automobile having a lithium ion battery module disposed thereon, and the lithium ion battery module is a lithium ion battery module provided by the present invention.
  • FIG. 1 is a schematic view showing the overall structure of a cooling plate in the prior art.
  • Figure 2 is a structural exploded view of a prior art cooling plate.
  • Figure 3 is a schematic view showing the overall structure of a cooling plate in one embodiment of the present invention.
  • Figure 4 is a schematic view showing the structure of a cooling pipe before being crushed in an embodiment of the present invention.
  • Figure 5 is a schematic view showing the structure of a cooling tube after being crushed in an embodiment of the present invention.
  • Figure 6 is a schematic view showing the structure of a cooling pipe after bending in an embodiment of the present invention.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” and “second” may include one or more of the features either explicitly or implicitly.
  • the meaning of "a plurality” is two or more unless specifically and specifically defined otherwise.
  • the terms “installation”, “connected”, “connected”, “fixed” and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. , or connected integrally; may be mechanical connection or electrical connection; may be directly connected, or may be indirectly connected through an intermediate medium, and may be internal communication between the two elements.
  • installation shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise.
  • , or connected integrally may be mechanical connection or electrical connection; may be directly connected, or may be indirectly connected through an intermediate medium, and may be internal communication between the two elements.
  • the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
  • the cooling plate provided by the practice of the present invention includes a heat conducting plate 1 and a cooling pipe 2, wherein the cooling pipe 2 includes a heat radiating portion 24 disposed in the heat conducting plate 1 and an inlet portion 22 at one end of the heat radiating portion 24 and an outlet at the other end of the heat radiating portion 24. Part 23.
  • the heat radiating portion 24 is an integral pipe, and the heat radiating portion 24 is embedded in the heat conducting plate 1 by injection molding of the heat conducting plate 1.
  • the heat dissipating portion 24 is disposed inside the heat conducting plate 1, and the heat collected by the heat conducting plate 1 is taken away by the cooling liquid flowing from the heat radiating portion 24 by the contact of the heat radiating portion 24 with the heat conducting plate 1 to To achieve the purpose of cooling and cooling.
  • the inlet portion 22 and the outlet portion 23 are respectively located at both ends of the heat radiating portion 24.
  • the inlet portion 22 and the outlet portion 23 refer to an interface at the end of the heat conducting plate 1 for introducing or discharging the coolant into the heat radiating portion 24.
  • the inlet portion 22 and the outlet portion 23 are merely examples of the pipe located at the end of the heat conducting plate 1, and the structure and specific position thereof are not limited. As shown in Fig.
  • the inlet portion 22 and the outlet portion 23 may be located on the same side of the heat conducting plate 1, and the positional relationship of one of them is described by the drawings of one embodiment; in addition, the inlet portion 22 and the outlet portion 23 are also It may be located on different sides of the heat conducting plate 1, for example, on opposite sides of the heat conducting plate 1 or on both sides adjacent to the heat conducting plate 1, which are possible, and are not intended to limit the invention.
  • the heat radiating portion 24 is an integrated pipe.
  • the integrated pipe here refers to a commonly used integrally formed pipe, and the heat radiating portion 24 is not welded or otherwise mechanically connected, but is made of a pipe made of a complete metal pipe or other insulating and heat conductive material.
  • the heat dissipating portion 24 is formed by bending a complete pipe, and the both ends thereof are an inlet portion 22 and an outlet portion 23.
  • the heat dissipating portion 24, the inlet portion 22 and the outlet portion 23 are all for the purpose of better describing the technical solution and technical effects of the present invention, and the artificial division of the cooling tube 2.
  • the heat sink portion 24, the inlet portion 22 and the outlet portion 23 are either a complete pipe if they come out alone; or three parts of a complete pipe.
  • the heat dissipating portion 24 is embedded in the heat conducting plate 1, and the heat conducting plate 1 is a plate body which is molded outside the heat radiating portion 24.
  • the heat dissipating portion 24 is an integral pipe, and the heat conducting plate 1 for wrapping or partially wrapping the heat dissipating portion 24 outside the heat dissipating portion 24 is formed by injection molding.
  • the heat dissipating portion 24 is first formed, and then the heat conducting plate 1 is injected onto the heat dissipating portion 24, thereby realizing the structural composition in which the heat dissipating portion 24 is embedded in the heat conducting plate 1.
  • the heat dissipating portion 24 located in the heat conducting plate 1 is an integrated pipe, and the cooling liquid flows in the cooling pipe 2 of the cooling plate. Since the heat dissipating portion 24 of the cooling pipe 2 is an integrated pipe, there is no welding. At the same time, the cooling liquid is not in contact with the soldering solder, and the cooling tube 2 does not affect the sealing performance or liquid leakage due to the corrosion of the solder.
  • the cooling tube 2 has high corrosion resistance and high sealing reliability. At the same time, the possibility of liquid leakage is reduced, the service life of the cooling plate is improved, and the safety performance of the battery is not adversely affected by the leakage, so that the battery module using the cooling plate has high safety performance.
  • the heat conducting plate 1 is formed outside the heat radiating portion 24 by injection molding to realize the structural feature in which the heat radiating portion 24 is embedded in the heat conducting plate 1.
  • the cooling plate having the structure does not need to use the traditional metal plate and the heat conducting plate structure of the sprayed insulating layer, and there is no problem that the insulating layer falls off and the insulating effect is not good, and the pressure resistance and the insulating property are high, thereby further improving the use.
  • the cooling tube 2 is an integral conduit, and the heat sink portion 24, the inlet portion 22 and the outlet portion 23 are all part of the integrated conduit.
  • a complete pipe integrated pipe, which may be a metal pipe or a pipe made of other insulating and heat conductive materials
  • the completed pipe is bent, including a heat dissipating portion. 24.
  • the inlet portion 22 and the outlet portion 23 In this way, when the cooling pipe 2 is made, a complete pipe (for example, a metal pipe) can be directly bent to form the cooling pipe 2; in the process, it is simple to make and there is no welding or welding on the cooling pipe 2.
  • Mechanical connection is possible to make and there is no welding or welding on the cooling pipe 2.
  • the coolant in the cooling pipe 2 not only does not corrode the heat radiating portion 24, but also does not corrode to the junction of the inlet portion 22, the outlet portion 23, and the heat radiating portion 24 with the inlet portion 22 and the outlet portion 23, further improving
  • the corrosion resistance and sealing reliability of the cooling tube reduce the possibility of liquid leakage and improve the safety performance of the battery module using the cooling plate.
  • the injection-molded heat-conducting plate may be integrally injection molded or may be injection-molded in sections.
  • integral injection molding is preferably employed, which simplifies the manufacturing process and can improve heat dissipation uniformity and strength of the entire cooling plate.
  • the injection molding method is a commonly used injection molding method, and is not specifically limited thereto; as long as the heat transfer plate can be formed by injection molding on the cooling pipe, the desired effect of the embodiment of the present invention can be achieved.
  • the heat dissipating portion 24 is a flat tube.
  • the flat tube is used to have two wide surfaces, so that the heat radiating portion 24 can contact the heat conducting plate 1 with a larger area, so that the heat in the heat conducting plate 1 It is easier to pass through the heat radiating portion 24 to the inside of the cooling pipe 2, and is carried away by the cooling liquid to provide a better heat dissipation effect.
  • the heat radiating portion 24 is formed by flattening a circular tube.
  • the thickness of the rounded tube can be controlled, and it is also more advantageous to make a regular shape of the cooling plate.
  • the above heat dissipating portion 24 or flat tube is preferably a material having good thermal conductivity and rolling property in materials, such as aluminum and aluminum alloy, copper and copper alloy, high thermal conductivity polymer material, magnesium aluminum alloy, and the like.
  • the material of the outer heat conducting plate 1 is preferably a material having a good thermal conductivity and strength, such as aluminum and aluminum alloy, copper and copper alloy, high thermal conductivity polymer material, magnesium aluminum alloy, and the like.
  • the thermally conductive plate 1 is a flat plate.
  • the flat plate is designed to better fit the structure around which the temperature needs to be cooled, so as to better realize the function of heat conduction.
  • the presence of the flat plate enables the heat conducting plate 1 to be in better contact with the heat dissipating portion 24 in the shape of a flat tube.
  • the heat conducting plate 1 can also be designed with the L shape or the groove. Matching structure.
  • the heat dissipating portion 24 may be selected to be bent back and forth in the heat conducting plate 1 a plurality of times to increase heat dissipation.
  • the contact area of the heat conducting plate 1 is increased by 24, thereby increasing the speed of heat transfer in the heat conducting plate 1 to the cooling pipe 2, and improving the heat dissipation performance of the cooling plate.
  • the pipe of the heat radiating portion 24 is bent a plurality of times to form the heat radiating portion 24 of a predetermined shape, and the heat conducting plate 1 is externally injected into the heat radiating portion 24 to form a final cooling plate.
  • the heat radiating portion 24 of the cooling pipe 2 may be arranged in a U-shape or a W-shape in the heat-conducting plate 1. As shown in Figure 6, it is a W-type arrangement.
  • the nozzle of the heat dissipating portion 24 is elliptical; of course, it may be other shapes such as a rectangle.
  • the elliptical nozzle can be directly formed by a circular tube on the one hand, and is convenient to manufacture.
  • the width of the heat dissipating portion that is, the ratio of the width of the wide face of the flat tube described above to the diameter of the flat tube before crushing is 1.2-2.
  • the ratio of the width of the broad face of the flat tube described above to the diameter of the flat tube before crushing is from 1.4 to 1.8. More preferably, the ratio range can be selected to be in the range of 1.4-1.8. The above ratio is proposed by comprehensively considering the influence of the contact area and the coolant flow rate on the heat dissipation effect.
  • the embodiment of the present invention further designs the heat radiating portion 24 of the cooling pipe 2, and defines the ratio of the width to the diameter of the round pipe; Under the premise, try to ensure the flow rate of the coolant in the cooling pipe.
  • a convex portion is provided on the outer side of the heat radiating portion 24, and the convex portion is provided. Front extension Stretched and embedded in the heat conducting plate 1.
  • the protruding portion may be a hollow structure, and a portion of the cooling liquid flowing through the heat dissipating portion 24 is filled inside the convex portion to better realize the transfer of the amount of the heat conducting plate 1 into the cooling tube 2, and then carried away by the cooling liquid. , to play the role of heat dissipation and cooling.
  • the convex portion In order to further increase the heat transfer speed, it is more preferable to extend the convex portion along the heat conducting plate 1 to the outside of the heat conducting plate 1. At this time, in order to ensure the flatness of the surface of the heat conducting plate 1, the top end of the convex portion is set to It is flush with the outer surface of the heat conducting plate. In this solution, the contact portion of the boss portion with the heat conducting plate 1 is maximized, further increasing the heat transfer speed between the two.
  • the heat conducting plate 1 is preferably injection molded from an insulating heat conductive material.
  • the insulating and thermally conductive material is not particularly limited as long as it can be used as an insulating and heat conducting material and can be injection molded into a plate body.
  • the embodiment of the invention further provides a lithium ion battery module, wherein the lithium ion battery module is provided with a cooling plate, and the cooling plate is a cooling plate provided by an embodiment of the invention.
  • the lithium ion battery module provided by the embodiment of the invention does not appear to leak or affect the safety performance of the cooling tube in the cooling plate, and the cooling plate has high sealing reliability and corrosion resistance, and heat conduction.
  • the board can provide good insulation and high safety performance.
  • the embodiment of the invention further provides an automobile, wherein the lithium ion battery module provided by the embodiment of the invention is disposed in the automobile.

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  • Manufacturing & Machinery (AREA)
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Abstract

本发明公开了一种冷却板，包括导热板和冷却管，冷却管包括设置在导热板内的散热部以及位于散热部一端的进口部和位于散热部另一端的出口部，散热部为一体式管道；散热部内嵌在导热板内，导热板为注塑在散热部外的板体。另外，本发明还提供了一种包括上述冷却板的锂离子电池模组和包括锂离子电池模组的汽车。

Description

冷却板、锂离子电池模组及汽车
相关申请的交叉引用
本申请基于申请号为201510372725.8、申请日为2015年6月30日的中国专利申请，以及申请号为201520461120.1、申请日为2015年6月30日的中国专利申请提出，并要求中国专利申请的优先权，中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本发明涉及锂离子电池模组的冷却散热领域，主要涉及一种冷却板及包括该冷却板的锂离子电池模组。
背景技术
锂离子二次电池由于具有重量轻、体积小、无污染、内压小、低成本等优点，已经成为便携电子设备的主要电源。然而，在电池的使用过程中，许多极端(如短路、大电流充放电等)情况下，电池模组内部会产生大量的热量。如果不及时进行散热，将会对电池模组的使用性能特别是安全性能造成很大的影响。特别是在车辆使用的动力电池中，更需要注意电池的安全性能。因此，通过对电池模组中散热结构的设计，使得在电池模组的使用过程中，或出现极端的情况下，其内部热量能及时散发出去，是动力电池的制作和使用中需要重点研究的方向。
现有技术常用的散热方案中，多采用两层金属板对接而成一块冷却板。如图1和图2所示，冷却板1包括上金属板11和下金属板12，在上金属板11或下金属板12中至少一者上设置有冷却凹槽21(如图2所示，在下金属板12上设置了冷却凹槽21)，然后将上金属板11和下金属板12通过钎焊固定连接在一起，并将冷却凹槽21密封在上金属板11和下金属板12之间，形成密封的冷却通道，供冷却液流动。在该技术方案中，冷却通道的进口和出口，都需要外接管道，并且需要进行焊接密封。
上述技术方案中，上金属板11和下金属板12之间的钎焊焊接面过长，并且冷却通道与进口和出口之间也要进行焊接，在使用过程中，焊接处容易被流通在冷却通道中的冷却液所腐蚀，进而出现漏液的问题。因此，上述方案中，冷却板的寿命有限。另外，被腐蚀后容易出现漏液的情况，导致液体流入电池模组内，容易对电池模组造成损伤，降低电池模组的使用寿命；并且，漏液不仅会造成散热效果不好，而且会影响电池模组使用的安全性能。
另外，现有技术中，上金属板11和下金属板12为金属板，制作过程中，需要在 其表面喷涂绝缘层，如果该绝缘层的耐压不够，容易脱落，则绝缘效果不好，会影响动力电池模组的安全性能。
发明内容
本发明旨在至少在一定程度上解决上述技术问题。
本发明的一个目的在于提出一种冷却管及冷却板不易受腐蚀、不会漏液；并且，导热板绝缘性能好的、安全性能高的冷却板。
为了解决上述技术问题，本发明提供了一种冷却板，包括导热板和冷却管，所述冷却管包括散热部以及位于散热部一端的进口部和位于散热部另一端的出口部，所述散热部为一体式管道；所述导热板为注塑成型的板体，所述散热部通过所述导热板的注塑成型内嵌在所述导热板内。
本发明提供的冷却板，位于导热板内的散热部为一体式管道。冷却液流动在冷却板的冷却管中，由于冷却管的散热部为一体式管道，没有焊接边，冷却液接触不到焊接钎料，冷却管不会因为焊料被腐蚀而影响其密封性能或出现漏液的情况，该冷却管的耐腐蚀性强、密封可靠性高。同时，降低了漏液的可能性，提高了冷却板的使用寿命；并且不会因漏液对电池的安全性能带来不利影响，使用该冷却板的电池模组安全性能高。同时，导热板为注塑在散热部外的板体，其耐压性、绝缘性能较高，提高了使用该冷却板的动力电池模组的安全性能。
优选地，所述散热部、进口部和出口部为一体成型的管道。
优选地，所述导热板为一体注塑成型。
进一步，所述散热部为扁管。
进一步，所述散热部由圆管压扁而成。
优选地，所述导热板为平板。
优选地，所述散热部在导热板内多次弯折。
进一步，所述散热部呈U型或W型。
优选地，所述散热部的管口为椭圆形或矩形。
优选地，所述散热部的宽度与压扁前圆管的直径的比值为1.2-2。
进一步，所述散热部的宽度与压扁前圆管的直径的比值为1.4-1.8。
优选地，所述散热部的外侧壁上设置有凸起部，所述凸起部内嵌在所述导热板内。
进一步，所述凸起部的顶端与导热板的外表面平齐。
优选地，，所述导热板由绝缘导热材料注塑而成。
本发明的另一个目的在于提供了一种锂离子电池模组，所述锂离子电池模组中设 置有冷却板，所述冷却板为本发明提供的冷却板。
本发明提供的锂离子电池模组，不会出现因冷却板中冷却管受腐蚀而漏液或影响其安全性能的情况，冷却板具有较高的密封可靠性和耐腐蚀性，并且导热板能起到很好的绝缘效果，具有较高的安全性能。
本发明的另一目的在于提供了一种汽车，所述汽车上设置有锂离子电池模组，所述锂离子电池模组为本发明提供的锂离子电池模组。
本发明的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。
附图说明
本发明的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1是现有技术中冷却板的整体结构示意图。
图2是现有技术中冷却板的结构爆炸图。
图3是本发明一个实施例中冷却板的整体结构示意图。
图4是本发明一个实施例中压扁前的冷却管结构示意图。
图5是本发明一个实施例中压扁后的冷却管结构示意图。
图6是本发明一个实施例中弯折后的冷却管结构示意图。
附图标记：
1、导热板；11、上金属板；12、下金属板；2、冷却管；21、冷却凹槽；22、进口部；23、出口部；24、散热部。
具体实施方式
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理 解为对本发明的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
下面，结合附图3和4说明本发明实施例提供的冷却板。本发明实施提供的冷却板包括导热板1和冷却管2，其中冷却管2包括设置在导热板1内的散热部24以及位于散热部24一端的进口部22和位于散热部24另一端的出口部23。散热部24为一体式管道，散热部24通过导热板1的注塑成型内嵌在导热板1内。
根据本发明的实施例，散热部24设置在导热板1内部，通过散热部24与导热板1的接触，将导热板1收集到的热量经由从散热部24流过的冷却液带走，以达到冷却、降温的目的。
在本发明的实施例中，如图3和图4所示，进口部22和出口部23分别位于散热部24的两端。这里的进口部22和出口部23指的是位于导热板1的端部，用来向散热部24中引入或从散热部24中导出冷却液的接口。进口部22和出口部23只是对位于导热板1端部的管道的叫法，对其结构和具体位置并不做限定。如图3所示，进口部22和出口部23可以位于导热板1的同一侧，这里只是用一个实施例的附图描述了其中一种的位置关系；此外，进口部22和出口部23也可以位于导热板1的不同侧，例如可以位于导热板1相对的两侧或者导热板1相邻的两侧，都是可行的，在此不构成对本发明的限定。
散热部24为一体式管道。这里的一体式管道是指常用的一体成型的管道，散热部24上没有焊接、或者其他机械连接，而是由一个完整的金属管或其他绝缘导热材料制成的管道制成。在本发明的一个实施例中，如图4所示，散热部24即由一个完整的管道通过折弯而形成，其两端为进口部22和出口部23。本发明的实施例中，散热部24、进口部22和出口部23均是为了更好的描述本发明的技术方案和技术效果，人为的对冷却管2的划分。实际上，散热部24、进口部22和出口部23如果单独出来，都是一个完整的管道；或者是一个完整管道的三个部分。
本发明的实施例中，散热部24内嵌在导热板1内，导热板1为注塑在散热部24外的板体。散热部24为一体式管道，位于散热部24外侧、用于包裹或部分包裹该散热部24的导热板1是通过注塑的方式形成的。具体的操作，先制作散热部24，再在散热部24上注塑导热板1，进而实现散热部24内嵌在导热板1内的结构组成。
本发明实施例提供的冷却板，位于导热板1内的散热部24为一体式管道，冷却液流动在冷却板的冷却管2中，由于冷却管2的散热部24为一体式管道，没有焊接边，冷却液接触不到焊接钎料，冷却管2不会因为焊料被腐蚀而影响其密封性能或出现漏液的情况，该冷却管2的耐腐蚀性强、密封可靠性高。同时，降低了漏液的可能性，提高了冷却板的使用寿命；并且不会因漏液对电池的安全性能带来不利影响，使得使用该冷却板的电池模组安全性能高。
此外，导热板1通过注塑的方式形成在散热部24外，以实现散热部24内嵌在导热板1内的结构特征。具有此结构的冷却板，无需使用传统的金属板加喷涂绝缘层的导热板结构，不存在绝缘层脱落、造成绝缘效果不好的问题，其耐压性、绝缘性能较高，进一步提高了使用该冷却板的动力电池模组的安全性能。
本发明的一个实施例中，上述冷却管2为一体式管道，散热部24、进口部22和出口部23均为该一体式管道的一部分。如图4或图5所示，将一个完整的管道(一体式管道，可以是金属管或者其他绝缘导热材料制成的管道)弯折后形成，该完整的管道经弯折后，包括散热部24、进口部22和出口部23。如此做法，在制作冷却管2时，可以直接将一个完整的管道(例如金属管)进行弯折，制成冷却管2；在此过程中，制作简单并且使得冷却管2上没有任何的焊接或机械连接。因此，不仅散热部24上没有任何焊接痕迹，而且散热部24与进口部22、散热部24与出口部23以及进口部22、出口部23上均没有任何焊接痕迹。所以，冷却管2内的冷却液不仅不会腐蚀散热部24，而且不会腐蚀到进口部22、出口部23以及散热部24与进口部22和出口部23的连接处，更进一步的提高了冷却管的耐腐蚀性和密封可靠性，降低了漏液的可能性，提高了使用该冷却板的电池模组的安全性能。
在本发明的实施例中，注塑成型的导热板，可以是一体注塑成型，也可以是分段进行注塑。作为本发明的一个优选实施例中，优选采用一体注塑成型，这样可以简化制作工序并且能够提高散热均匀性和整个冷却板的强度。
上文中，注塑方法为常用的注塑方法，在此并不对其做具体限定；只要能在冷却管外注塑形成导热板，即能实现本发明实施例想要的效果即可。
如图5所示，本发明的一个实施例中，散热部24为扁管。此处利用了扁管具有两个宽大的表面，使散热部24能够更大面积的与导热板1接触，使得导热板1中的热量 更容易的通过散热部24传入冷却管2内部，由冷却液带走，起到更好的散热效果。
更进一步，本发明的另一个实施例中，散热部24由圆管压扁而成。在圆管压扁的过程中，可以控制圆管压扁的厚度，也更加有利于制作规则形状的冷却板。
以上散热部24或扁管在材料商优选导热性和压延性较好的材料，比如铝及铝合金、铜及铜合金、高导热率聚合物材料、镁铝合金等。外部导热板1的材料优选导热率及强度较好的材料，例如铝及铝合金、铜及铜合金、高导热率聚合物材料、镁铝合金等。
本发明的一个实施例中，如图3所示，导热板1为平板。设置成平板是为了更好的与周围需要降温的结构进行良好的贴合，以更好的实现热传导的功能。并且，平板的存在，使得导热板1能够与形状为扁管的散热部24更好的接触。当然，为了更好的与外部需要降温的结构相配合，如果外部结构存在某些特殊的形状，比如L形、表面带有凹槽等，导热板1也可以设计成与该L形或凹槽相匹配的结构。
本发明的一个实施例中，如图5或图6所示，为了使冷却板更好的起到散热作用，可以选择散热部24在导热板1中来回弯折多次排布，以增加散热部24余导热板1的接触面积，从而增加导热板1中热量向冷却管2中传递的速度，提高冷却板的散热性能。制作过程中，先将散热部24的管道经多次弯折形成预定形状的散热部24，再在散热部24外注塑导热板1，形成最终的冷却板。
更优选的，本发明中，冷却管2的散热部24可以在导热板1内呈U型或W型排布。如图6所示，即为W型排布。
本发明的一个实施例中，散热部24的管口为椭圆形；当然，还可以为矩形等其他形状。椭圆形的管口，一方面可以通过圆管直接挤压形成，制作方便。
在本发明中，散热部的宽度，即上文中所述的扁管的宽面的宽度与压扁前圆管的直径的比值为1.2-2。优选地，上文中所述的扁管的宽面的宽度与压扁前圆管的直径的比值为1.4-1.8。更优选地，可以选择比例范围在1.4-1.8的范围之内。上述比例，是通过综合考虑到接触面积和冷却液流速对散热效果的影响前提下提出的。理论上来说，接触面积越大、冷却液流速越快，冷却板的散热效果也就越好；但在实际结构中，若想接触面积大，就要对散热部24压的更扁，这样势必会影响冷却液在冷却管中流通时的液体截面积，截面积越小，冷却液的流速就会越慢。因此，为了兼顾接触面积和冷却液的流速，本发明的实施例进一步对冷却管2的散热部24进行了设计，将其宽度与圆管的直径比值做了限定；在尽可能增加接触面积的前提下，尽量保证冷却液在冷却管中的流速。
本发明的一个实施例中，为了增大散热部24和导热板1的接触面积，提高散热部24与导热板1之间的热传导速度，在散热部24的外侧设置有凸起部，该凸起部向外延 伸，内嵌在导热板1内。通过凸起部的设计，增加散热部24与导热板1的接触面积，进而提高散热速度。
上述凸起部可以是中空结构，流经散热部24的冷却液部分填充在该凸起部内部，以更好的实现将导热板1的量传递至冷却管2内，再由冷却液带走，起到散热、降温的作用。
为了进一步提高热传递速度，更优选的，可以将凸起部沿导热板1一直延伸到导热板1的外部，此时，为了保证导热板1表面的平坦度，将凸起部的顶端设置成与导热板的外表面平齐。此方案中，使得凸起部与导热板1的接触部分最大化，进一步提高了两者之间的热传递速度。
本发明实施例的上述方案中，为了提高绝缘效果，导热板1优选由绝缘导热材料注塑而成。该绝缘导热材料，只要是能起到绝缘和导热作用的材料，并且能注塑成型板体，在本发明中都是可行的，在此不做具体限定。
本发明实施例还提供了一种锂离子电池模组，该锂离子电池模组中设置有冷却板，上述冷却板为本发明实施例提供的冷却板。
本发明实施例提供的锂离子电池模组，不会出现因冷却板中冷却管受腐蚀而漏液或影响其安全性能的情况，冷却板具有较高的密封可靠性和耐腐蚀性，并且导热板能起到很好的绝缘效果，具有较高的安全性能。
本发明实施例还提供了一种汽车，该汽车中设置有本发明实施例提供的锂离子电池模组。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
尽管上面已经示出和描述了本发明的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本发明的限制，本领域的普通技术人员在不脱离本发明的原理和宗旨的情况下在本发明的范围内可以对上述实施例进行变化、修改、替换和变型。

Claims (16)

  1. 一种冷却板，其特征在于，包括导热板和冷却管，所述冷却管包括散热部以及位于散热部一端的进口部和位于散热部另一端的出口部，所述散热部为一体式管道；所述导热板为注塑成型的板体，所述散热部通过所述导热板的注塑成型内嵌在所述导热板内。
  2. 根据权利要求1所述的冷却板，其特征在于，所述散热部、进口部和出口部为一体成型的管道。
  3. 根据权利要求1或2所述的冷却板，其特征在于，所述导热板为一体注塑成型。
  4. 根据权利要求1至3中任一项所述的冷却板，其特征在于，所述散热部为扁管。
  5. 根据权利要求4所述的冷却板，其特征在于，所述散热部由圆管压扁而成。
  6. 根据权利要求1至5中任一项所述的冷却板，其特征在于，所述导热板为平板。
  7. 根据权利要求1至6中任一项所述的冷却板，其特征在于，所述散热部在导热板内多次弯折。
  8. 根据权利要求7所述的冷却板，其特征在于，所述散热部呈U型或W型。
  9. 根据权利要求1至8中任一项所述的冷却板，其特征在于，所述散热部的管口为椭圆形或矩形。
  10. 根据权利要求5至9中任一项所述的冷却板，其特征在于，所述散热部的宽度与压扁前圆管的直径的比值为1.2-2。
  11. 根据权利要求10所述的冷却板，其特征在于，所述散热部的宽度与压扁前圆管的直径的比值为1.4-1.8。
  12. 根据权利要求1至11中任一项所述的冷却板，其特征在于，所述散热部的外侧壁上设置有凸起部，所述凸起部内嵌在所述导热板内。
  13. 根据权利要求12所述的冷却板，其特征在于，所述凸起部的顶端与导热板的外表面平齐。
  14. 根据权利要求1至13中任一项所述的冷却板，其特征在于，所述导热板由绝缘导热材料注塑而成。
  15. 一种锂离子电池模组，其特征在于，所述锂离子电池模组中设置有冷却板，所述冷却板为权利要求1-14任意一项所述的冷却板。
  16. 一种汽车，其特征在于，所述汽车上设置有锂离子电池模组，所述锂离子电池模组为权利要求15所述的锂离子电池模组。
PCT/CN2016/084739 2015-06-30 2016-06-03 冷却板、锂离子电池模组及汽车 Ceased WO2017000747A1 (zh)

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