WO2023216775A1 - 用于储能系统的液冷管路、液冷系统以及储能设备 - Google Patents

用于储能系统的液冷管路、液冷系统以及储能设备 Download PDF

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Publication number
WO2023216775A1
WO2023216775A1 PCT/CN2023/086381 CN2023086381W WO2023216775A1 WO 2023216775 A1 WO2023216775 A1 WO 2023216775A1 CN 2023086381 W CN2023086381 W CN 2023086381W WO 2023216775 A1 WO2023216775 A1 WO 2023216775A1
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WO
WIPO (PCT)
Prior art keywords
liquid
pipe
liquid inlet
liquid outlet
outlet
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Application number
PCT/CN2023/086381
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English (en)
French (fr)
Inventor
卢洪涛
问妮娜
Original Assignee
江苏天合储能有限公司
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Publication date
Application filed by 江苏天合储能有限公司 filed Critical 江苏天合储能有限公司
Priority to AU2023266704A priority Critical patent/AU2023266704A1/en
Priority to EP23802551.4A priority patent/EP4336625A1/en
Publication of WO2023216775A1 publication Critical patent/WO2023216775A1/zh

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Classifications

    • 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
    • H01M10/65—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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 present application relates to the field of new energy, and in particular to a liquid cooling pipeline for an energy storage system, a liquid cooling system for an energy storage system, and an energy storage device.
  • the cooling method of energy storage systems is mostly forced air cooling, and a few energy storage systems use liquid cooling systems to cool battery packs.
  • the number of liquid cooling pipelines required in the energy storage system has increased significantly.
  • the cooling pipes connected in series will cause the temperature of the coolant entering each battery pack to be uneven, and gas will easily be generated in the cooling circuit, leading to problems such as large temperature differences between battery packs and local high temperatures, which will affect the life and efficiency of the entire energy storage system.
  • the technical problem to be solved by this application is to provide a liquid cooling pipeline and liquid cooling system for an energy storage system that improves the temperature uniformity of the cooling pipeline and avoids the generation of gas in the cooling circuit.
  • a liquid cooling pipeline for an energy storage system including: a liquid inlet pipeline, including a main liquid inlet pipe, several battery cluster liquid inlet pipes and several battery packs Liquid inlet pipe, the liquid inlet main pipe has a liquid inlet and several liquid outlets, each battery cluster liquid inlet pipe has a liquid inlet and several liquid outlets, each battery pack liquid inlet pipe has A liquid inlet and several liquid outlets.
  • a liquid outlet of the liquid inlet main pipe is respectively connected to a liquid inlet of the battery cluster liquid inlet pipe.
  • Each liquid outlet of the battery cluster liquid inlet pipe are respectively connected to the liquid inlet of one of the battery pack liquid inlet pipes; and the liquid outlet pipeline, including the liquid outlet main pipe, Several battery cluster liquid outlet pipes and several battery pack liquid outlet pipes.
  • the liquid outlet main pipe has a liquid outlet and several liquid inlets.
  • Each of the battery cluster liquid outlet pipes has a liquid outlet located on the battery.
  • Each battery pack outlet pipe has a liquid outlet and several liquid inlets, wherein each liquid outlet of the battery pack outlet pipe The ports are respectively connected to the liquid inlet of one battery cluster liquid outlet pipe, and each liquid outlet of the battery cluster liquid outlet pipe is respectively connected to the liquid inlet of the liquid outlet main pipe.
  • the liquid cooling pipeline further includes at least two cooling flow channels, each of the cooling flow channels has a liquid inlet and a liquid outlet, and the liquid inlet of the cooling flow channel is connected with the liquid outlet.
  • the liquid outlet of the battery pack liquid inlet pipe is connected, and the liquid outlet of the cooling flow channel is connected with the liquid inlet of the battery pack liquid outlet pipe, wherein the flow direction of the cooling liquid in the adjacent cooling flow channel on the contrary.
  • the inner diameter of the liquid inlet of the cooling flow channel is less than or equal to the inner diameter of the liquid outlet.
  • the inner diameters of several liquid outlets of each battery cluster liquid inlet pipe decrease along the liquid flow direction.
  • the inner diameters of the several liquid inlets of the liquid inlet main pipe are not less than the maximum inner diameters of the several liquid outlets of the liquid inlet main pipe.
  • the inner diameters of several liquid outlets of the liquid inlet main pipe increase along the direction of liquid flow.
  • the liquid inlet main pipe includes a first liquid inlet main pipe and a second liquid inlet main pipe, the first liquid inlet main pipe is made of flexible material, and the liquid inlet of the liquid inlet main pipe is located on the One end of the first liquid inlet main pipe is away from the second liquid inlet main pipe.
  • the liquid outlet pipe includes a first liquid outlet pipe and a second liquid outlet pipe, the first liquid outlet pipe is made of flexible material, and the liquid outlet of the liquid outlet pipe is located on the One end of the first liquid outlet pipe is away from the second liquid outlet pipe.
  • the present application also provides a liquid cooling system for an energy storage system, including a liquid cooling pipeline and a liquid cooling machine as described above.
  • the liquid cooling machine is connected to the liquid inlet of the liquid inlet main pipe and the outlet of the liquid main pipe. Liquid port connection.
  • This application also provides an energy storage device, including the liquid cooling system as mentioned above.
  • the liquid cooling pipeline of this application can effectively discharge the gas in the liquid and improve the temperature uniformity of the energy storage system by setting an exhaust valve at the top of the liquid inlet pipe of each battery cluster.
  • the liquid cooling pipeline of the present application is configured to increase the liquid outlet of the liquid outlet main pipe in the direction of liquid flow, and the liquid outlet of the battery cluster liquid inlet pipe is set to be larger in the direction of liquid flow. Decreasing along the direction of liquid flow helps improve the temperature uniformity of the energy storage system.
  • Figure 1 is a schematic structural diagram of a liquid cooling pipeline used in an energy storage system according to an embodiment of the present application
  • Figure 2 is a schematic structural diagram of the dotted box portion in Figure 1;
  • Figure 3 is a schematic structural diagram of a liquid inlet main pipe according to an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a battery cluster liquid inlet pipe according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a battery pack liquid inlet pipe according to an embodiment of the present application.
  • Figure 6 is a schematic structural diagram of the liquid outlet main pipe according to an embodiment of the present application.
  • Figure 7 is a schematic structural diagram of a battery cluster liquid outlet pipe according to an embodiment of the present application.
  • Figure 8 is a schematic structural diagram of a battery pack discharge pipe according to an embodiment of the present application.
  • Figure 9 is a schematic structural diagram of a cooling flow channel according to an embodiment of the present application.
  • Figure 10 is a schematic front view of a battery cluster according to an embodiment of the present application.
  • spatial relationship words such as “below”, “below”, “below”, “below”, “above”, “on”, etc. may be used herein to describe an element shown in the drawings or the relationship of a feature to other elements or features. It will be understood that these spatially relative terms are intended to encompass other orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if the device in the figures is turned over, elements described as “below” or “under” or “beneath” other elements or features would then be oriented “above” the other elements or features. Thus, the exemplary words “below” and “below” can encompass both upper and lower directions.
  • the device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein should be interpreted accordingly. Additionally, it will also be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present.
  • structures described as having a first feature "on" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed between the first and second features. Embodiments between second features such that the first and second features may not be in direct contact.
  • FIG 1 shows a liquid cooling pipeline and its cooling energy storage equipment according to an embodiment of the present application.
  • the energy storage equipment includes five battery clusters 200.
  • Figure 2 shows a schematic structural diagram of the battery cluster in the dotted box in Figure 1 , the battery cluster is composed of 8 battery packs 210 stacked in sequence. It can be understood that the number of battery clusters and battery packs can be adjusted according to actual needs and is not limited to the above embodiment.
  • Figures 3 to 5 are schematic structural diagrams of different components in the liquid inlet pipeline according to an embodiment of the present application.
  • Figures 6 to 8 are schematic structural diagrams of different components in the liquid outlet pipeline according to an embodiment of the present application.
  • the liquid cooling pipeline of the present application will now be described with reference to Figures 1 to 8 .
  • the liquid cooling pipeline includes a liquid inlet pipeline and a liquid outlet pipeline.
  • the liquid inlet pipeline includes a liquid inlet main pipe 110 , five battery cluster liquid inlet pipes 120 , and eight battery pack liquid inlet pipes 130 .
  • the liquid inlet main pipe 110 extends generally along the horizontal direction.
  • the battery cluster liquid inlet pipes 120 generally extend along the vertical direction, and the battery cluster liquid inlet pipes 120 are arranged at intervals.
  • the liquid inlet main pipe 110 has a liquid inlet 111 and five liquid outlets 112 .
  • the liquid inlet 111 is the inlet of the cooling liquid, and the cooling liquid enters the liquid cooling main pipe from the liquid inlet 111 .
  • the liquid inlet 111 can be used to be connected with the liquid output end of the coolant input device to input coolant to the liquid cooling main pipe.
  • the liquid inlet main pipe 110 includes a first liquid inlet main pipe 113 and a second liquid inlet main pipe 114 .
  • the first liquid inlet manifold 113 is made of flexible material, and the liquid inlet 111 of the liquid inlet manifold 110 is located at an end of the first liquid inlet manifold 113 away from the second liquid inlet manifold 114 .
  • Using the first liquid inlet main pipe 113 of flexible material and arranging the liquid inlet 111 at one end of the first liquid inlet main pipe 113 helps the liquid inlet main pipe 110 to be tightly connected with the liquid output end of the coolant input device to prevent the coolant from flowing out. leakage, and can prevent the liquid inlet main pipe 110 from rupturing due to thermal expansion and contraction of the liquid inlet main pipe 110 .
  • the first liquid inlet main pipe is a rubber hose
  • the second liquid inlet main pipe is a metal pipe.
  • the liquid inlet main pipe 110 is covered with an insulation layer to prevent condensation from occurring.
  • the number of liquid outlets of the liquid inlet main pipe can be adjusted according to actual needs.
  • the number of liquid outlets 112 can also be other numbers, such as 3, 7, or 8.
  • the above embodiments do not constitute a limitation on the number of liquid outlets in this application. This description is also applicable to the relevant quantitative embodiments below, and will not be further described.
  • the inner diameters of several liquid outlets 112 of the liquid inlet manifold 110 increase along the liquid flow direction (indicated by arrows in FIG. 3 ). It should be noted that the inner diameter of the liquid outlet 112 increases along the liquid flow direction, including the following situations. One is that the inner diameter of the liquid outlet 112 increases sequentially along the liquid flow direction, conforming to a strict increasing function. The other is that the inner diameter of the liquid outlet 112 increases along the liquid flow direction in accordance with an increasing function, but the inner diameters of some adjacent liquid outlets 112 are the same.
  • the inner diameter of the part of the liquid outlet 112 close to the liquid inlet 111 of the liquid inlet manifold 110 is the same, but smaller than the inner diameter of the part of the liquid outlet 112 far away from the liquid inlet 111 .
  • the flow rate of the coolant will decrease due to friction and other factors.
  • FIG. 4 is a schematic structural diagram of a battery cluster liquid inlet pipe according to an embodiment of the present application.
  • Each battery cluster liquid inlet pipe 120 has a liquid inlet 121 and eight liquid outlets 122 .
  • each liquid outlet 112 of the liquid inlet main pipe 110 is connected to a liquid inlet of a battery cluster liquid inlet pipe 120 . 121 connections.
  • the inner diameters of the several liquid outlets 122 of the liquid inlet pipe 120 of each battery cluster decrease along the liquid flow direction (shown by the arrow in FIG. 4 ).
  • the inner diameters of the several liquid outlets 121 of the battery cluster liquid inlet pipe 120 decrease along the liquid flow direction means the same as "the inner diameters of the several liquid outlets 112 of the liquid inlet main pipe 110 increase along the liquid flow direction.
  • the meaning of "big” is similar, including both decreasing and strict decreasing, which will not be expanded upon here. Due to factors such as gravity, the coolant flows faster along the battery cluster liquid inlet pipe from top to bottom.
  • FIG. 5 is a schematic structural diagram of a battery pack liquid inlet pipe according to an embodiment of the present application.
  • Each battery pack liquid inlet pipe 130 has a liquid inlet 131 and two liquid outlets 132 .
  • each liquid outlet 122 of the battery cluster liquid inlet pipe 120 is respectively connected to the liquid inlet 131 of a battery pack liquid inlet pipe 130 .
  • the battery pack liquid inlet pipe 130 also includes a main pipe 133 and two branch pipes 134.
  • One end of the two branch pipelines 134 is connected to the main pipeline 133 through a tee joint 135, and the two liquid outlets 132 are respectively located at the other ends of the two branch pipelines 134.
  • the main pipeline 133 and the two branch pipelines 134 may both be nylon tubes. Nylon tube has a certain degree of flexibility and is easy to bend and deform, especially suitable for complex environments.
  • the liquid outlet 112 of the liquid inlet main pipe 110 is respectively connected to the liquid inlet 121 of a battery cluster liquid inlet pipe 120 .
  • the liquid inlet 121 of the battery cluster liquid inlet pipe 120 is a quick-plug interface, and the quick-plug interface can be quickly connected to the liquid outlet 112 of the liquid inlet main pipe 110 .
  • the liquid outlet 122 of the battery cluster liquid inlet pipe 120 is connected to the liquid inlet 131 of the battery pack liquid inlet pipe 130 .
  • the liquid outlet 122 of the battery cluster liquid inlet pipe 120 is implemented as a three-way joint, and a bellows 123 is connected between the three-way joints.
  • the coolant After the coolant enters the liquid inlet main pipe 110 from the liquid inlet 111 of the liquid inlet main pipe 110, the coolant then enters from the liquid inlet 121 of the battery cluster liquid inlet pipe 120 connected to the liquid outlet 112 of the liquid inlet main pipe 110. Then, the cooling liquid enters the battery pack liquid inlet pipe 130 from the liquid inlet 131 of the battery pack liquid inlet pipe 130 which is connected to the liquid outlet 122 of the battery cluster liquid inlet pipe 120 .
  • the liquid outlet pipeline includes a liquid outlet pipe 140 , five battery cluster liquid outlet pipes 150 , and eight battery pack liquid outlet pipes 160 .
  • the liquid outlet main pipe 140 extends generally along the horizontal direction.
  • the liquid outlet pipes 150 of the battery clusters generally extend along the vertical direction, and the liquid outlet pipes 160 of each battery cluster are arranged at intervals.
  • FIG. 6 shows a schematic structural diagram of a liquid outlet main pipe according to an embodiment of the present application.
  • the liquid outlet main pipe has a liquid outlet 142 and five liquid inlets 141 .
  • the liquid outlet 141 can be used to connect with the cooling liquid input device to recover the cooling liquid.
  • the liquid outlet pipe 140 includes a first liquid outlet pipe 143 and a second liquid outlet pipe 144.
  • the first liquid outlet pipe 143 is made of flexible material, and the liquid outlet of the liquid outlet pipe 140 is located in the first liquid outlet pipe. 143 is away from the end of the second liquid outlet pipe 144 .
  • the first liquid outlet main pipe 143 is made of flexible material, and the liquid inlet 141 is arranged at one end of the first liquid outlet main pipe 143, which helps the liquid outlet main pipe 140 to be tightly connected with the liquid output end of the coolant input device to prevent the coolant from flowing out. leakage, and can prevent the liquid outlet main pipe 140 from rupturing due to thermal expansion and contraction of the liquid outlet main pipe 140 .
  • the first liquid outlet main pipe is a rubber hose
  • the second liquid outlet main pipe is a metal pipe.
  • the liquid outlet pipe 110 is covered with an insulation layer to prevent condensation from occurring.
  • the inner diameters of the several liquid inlets of the liquid inlet main pipe are not less than the maximum inner diameters of the several liquid outlets of the liquid inlet main pipe. In this way, the resistance to coolant return can be reduced.
  • FIG. 7 is a schematic structural diagram of a battery cluster discharge pipe according to an embodiment of the present application.
  • each battery cluster liquid outlet pipe 150 has a liquid outlet 151 , an exhaust valve 152 located on the top of the battery cluster liquid outlet pipe 150 , and five liquid inlets 153 .
  • Each liquid outlet 151 of the battery cluster liquid outlet pipe 150 is respectively connected to the liquid inlet 141 of the liquid outlet main pipe 140 .
  • the liquid inlet 141 is a quick-plug interface to facilitate quick connection with the liquid outlet 151 . Before working on the liquid cooling pipeline, it is necessary to fill the liquid cooling pipeline with coolant.
  • the embodiment of the present application has an exhaust valve on each liquid inlet pipe. An exhaust valve is installed on the top of the battery cluster inlet pipe to effectively discharge the gas remaining in the coolant. This avoids local overheating of the liquid cooling pipeline caused by gas remaining in the coolant.
  • FIG 8 is a schematic structural diagram of a battery pack liquid outlet pipe according to an embodiment of the present application.
  • Each battery pack liquid outlet pipe 160 has a liquid outlet 161 and two liquid inlets 162 .
  • the liquid outlet 161 of the battery pack liquid outlet pipe 160 is connected to the liquid inlet 153 of the battery cluster liquid outlet pipe 150 .
  • the liquid cooling pipeline further includes at least two cooling flow channels.
  • this embodiment has two cooling flow channels 190, each cooling flow channel 190 has a liquid inlet 191 and a liquid outlet 192, wherein, The liquid inlet 191 is connected to the liquid outlet 132 of the battery pack liquid inlet pipe 130, and the liquid outlet 192 is connected to the liquid inlet 162 of the battery pack liquid outlet pipe 160.
  • the flow direction of the coolant in the adjacent cooling channel 190 is on the contrary. As shown in FIG.
  • the cooling flow channel 190 is provided in the battery pack 210 , and the cooling liquid flowing through the cooling flow channel 190 dissipates heat to the battery pack 210 .
  • the cooling flow channels By arranging the cooling flow channels so that the cooling fluid flows in opposite directions in adjacent cooling flow channels, it helps to improve the temperature uniformity of the battery pack.
  • the inner diameter of the liquid inlet of the cooling flow channel is larger than the inner diameter of the liquid outlet.
  • the battery cluster 200 has eight battery packs 210 stacked in sequence. Each battery pack has two cooling flow channels.
  • the liquid inlet 191 and the liquid outlet 192 of the cooling flow channel 190 are located in the battery pack 210 external.
  • the cooling liquid enters the cooling flow channel in the battery pack 210 from the liquid inlet 191 and flows out from the liquid outlet 192 .
  • the inner diameters of the liquid inlet 191 and the liquid outlet 192 of the cooling flow channel 190 in the four-layer battery pack 210 located at the upper part of the battery cluster 200 are consistent.
  • the inner diameter of the liquid outlet 192 of the middle two-layer battery pack 210 is consistent with the inner diameter of the liquid outlet 192 of the cooling flow channel 190 in the four-layer battery pack 210.
  • the inner diameter of the liquid inlet 191 in the two layers is larger than the liquid outlet.
  • the inner diameter of 192 is small.
  • the inner diameter of the liquid inlet 191 in the lowermost two layers of battery packs 210 is consistent with the inner diameter of the liquid outlet 192, and the inner diameter is consistent with the inner diameter of the liquid inlet 191 of the middle two layers of battery packs 210. Helps ensure the temperature uniformity of the battery pack.
  • the coolant entering the liquid inlet main pipe 110 from the liquid inlet 111 of the liquid inlet main pipe 110 first flows through the battery cluster liquid inlet pipe 120, and then flows into the battery pack liquid inlet pipe 130. , and then enters the cooling flow channel 190 through the liquid inlet 191 of the cooling flow channel 190 connected to the battery pack liquid inlet pipe 120, The battery pack 210 is cooled. Subsequently, the cooling liquid flows out from the cooling pipe 190 into the battery pack outlet pipe 160, then enters the liquid outlet main pipe 140 through the battery cluster outlet pipe 150, and finally flows out through the liquid outlet 141 of the liquid outlet main pipe 140.
  • the liquid cooling pipeline of the present application is helpful for setting the outlet of the liquid main pipe to increase in the direction of liquid flow, and setting the outlet of the battery cluster inlet pipe to decrease along the direction of liquid flow. Improve the temperature uniformity of liquid cooling pipelines.
  • an exhaust valve at the top of the liquid inlet pipe of each battery cluster, the gas in the liquid can be effectively discharged and the temperature uniformity of the liquid cooling pipeline can be improved.
  • the liquid cooling system includes the liquid cooling pipeline and the liquid cooling machine 220 as mentioned above.
  • the liquid cooling machine 220 is connected to the liquid inlet of the liquid inlet main pipe and the liquid outlet of the liquid outlet main pipe.
  • the above-mentioned liquid cooling machine can provide power for the coolant, and on the other hand, it can reduce the temperature of the coolant.
  • This application also proposes an energy storage device, including the liquid cooling system as mentioned above.
  • the liquid cooling system and energy storage equipment used in the energy storage system of the present application have the effect of improving the temperature uniformity of the cooling pipeline.
  • this application uses specific words to describe the embodiments of the application.
  • “one embodiment”, “an embodiment”, and/or “some embodiments” means a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that “one embodiment” or “an embodiment” or “an alternative embodiment” mentioned twice or more at different places in this specification does not necessarily refer to the same embodiment. .
  • certain features, structures or characteristics in one or more embodiments of the present application may be appropriately combined.
  • numbers are used to describe the quantities of components and properties. It should be understood that such numbers used to describe the embodiments are modified by the modifiers "about”, “approximately” or “substantially” in some examples. Grooming. Unless otherwise stated, “about,””approximately,” or “substantially” means that the stated number is allowed to vary by ⁇ 20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims Numbers are approximations, which may vary depending on the desired characteristics of individual embodiments. In some embodiments, numerical parameters should account for the specified number of significant digits and use general digit preservation methods. Although the numerical fields and parameters used to confirm the breadth of the ranges in some embodiments of the present application are approximations, in specific embodiments, such numerical values are set as accurately as feasible.

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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Secondary Cells (AREA)
  • Separation By Low-Temperature Treatments (AREA)
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Abstract

本申请提供一种用于储能系统的液冷管路以及液冷系统。液冷管路包括：进液管路，包括进液总管、若干个电池簇进液管和若干个电池包进液管，进液总管具有进液口和若干个出液口，每个电池簇进液管具有进液口和若干个出液口，每个电池包进液管具有进液口和若干个出液口，进液总管的每个出液口分别与一个电池簇进液管的进液口连接，电池簇进液管的每个出液口分别与一个电池包进液管的进液口连接；出液管路，包括出液总管、若干个电池簇出液管和若干个电池包出液管，每个电池簇出液管具有出液口、位于电池簇出液管顶部的排气阀和若干个进液口，每个电池包出液管具有出液口和若干个进液口。本申请的液冷管路具有提高储能系统均温性的效果。

Description

用于储能系统的液冷管路、液冷系统以及储能设备 技术领域
本申请涉及新能源领域，尤其涉及一种用于储能系统的液冷管路、用于储能系统的液冷系统以及一种储能设备。
背景技术
由于使用风能、太阳能等新能源进行发电易受到气候和天气影响，以及随着我国电网运营面临用电负荷持续增加、间歇式能源接入占比扩大、调峰手段有限等诸多困难，储能技术得到了空前发展。
目前，储能系统的冷却方式多为强制风冷，少数储能系统采用液冷系统来对电池包进行冷却。但由于储能系统中电池包数量众多，导致储能系统中需要的液冷管路数量显著增加。串联的冷却管道会导致进入到每一个电池包的冷却液温度不均匀，并且冷却回路中容易产生气体，导致电池包间温差大、局部高温等问题，进而影响整个储能系统的寿命以及效率。
所以，如何提高冷却管路的均温性，同时避免冷却回路中产生气体是亟待解决的技术问题。
发明内容
本申请要解决的技术问题是提供一种提高冷却管路均温性，以及避免冷却回路中产生气体的用于储能系统的液冷管路以及液冷系统。
本申请为解决上述技术问题而采用的技术方案是一种用于储能系统的液冷管路，包括：进液管路，包括进液总管、若干个电池簇进液管和若干个电池包进液管，所述进液总管具有进液口和若干个出液口，每个所述电池簇进液管具有进液口和若干个出液口，每个所述电池包进液管具有进液口和若干个出液口，所述进液总管的每个出液口分别与一个所述电池簇进液管的进液口连接，所述电池簇进液管的每个出液口分别与一个所述电池包进液管的进液口连接；以及出液管路，包括出液总管、 若干个电池簇出液管和若干个电池包出液管，所述出液总管具有出液口和若干个进液口，每个所述电池簇出液管具有出液口、位于所述电池簇出液管顶部的排气阀和若干个进液口，每个所述电池包出液管具有出液口和若干个进液口，其中，所述电池包出液管的每个出液口分别与一个所述电池簇出液管的进液口连接，所述电池簇出液管的每个出液口分别与所述出液总管的进液口连接。
在本申请的一实施例中，液冷管路还包括至少两个冷却流道，每个所述冷却流道具有进液口和出液口，所述冷却流道的进液口与所述电池包进液管的出液口连接，所述冷却流道的出液口与所述电池包出液管的进液口连接，其中，相邻的所述冷却流道里的冷却液的流动方向相反。
在本申请的一实施例中，沿所述电池簇进液管中液体的流动方向，所述冷却流道的进液口的内径小于或等于出液口的内径。
在本申请的一实施例中，每个所述电池簇进液管的若干个出液口的内径沿液体流动方向减小。
在本申请的一实施例中，所述出液总管的若干个进液口的内径均不小于所述进液总管的若干个出液口的最大内径。
在本申请的一实施例中，所述进液总管的若干个出液口的内径沿液体流动方向增大。
在本申请的一实施例中，所述进液总管包括第一进液总管和第二进液总管，所述第一进液总管为柔性材料，所述进液总管的进液口位于所述第一进液总管远离所述第二进液总管的一端。
在本申请的一实施例中，所述出液总管包括第一出液总管和第二出液总管，所述第一出液总管为柔性材料，所述出液总管的出液口位于所述第一出液总管远离所述第二出液总管的一端。
本申请还提供一种用于储能系统的液冷系统，包括如前文所述的液冷管路和液冷机，所述液冷机与所述进液总管进液口和出液总管出液口连接。
本申请还提供一种储能设备，包括如前文所述的液冷系统。
本申请的液冷管路通过在每个电池簇进液管的顶部设置排气阀可以有效地排出液体中的气体，提高储能系统的均温性。此外，本申请的液冷管路通过将出液总管的出液口在液体流动的方向上设置为增大，以及将电池簇进液管的出液口设置为 沿液体流动方向减小，有助于提高储能系统的均温性。
附图概述
为让本申请的上述目的、特征和优点能更明显易懂，以下结合附图对本申请的具体实施方式作详细说明，其中：
图1是本申请一实施例的用于储能系统的液冷管路结构示意图；
图2是图1中虚线框部分的结构示意图；
图3是本申请一实施例的进液总管的结构示意图；
图4是本申请一实施例的电池簇进液管的结构示意图；
图5是本申请一实施例的电池包进液管的结构示意图；
图6是本申请一实施例的出液总管的结构示意图；
图7是本申请一实施例的电池簇出液管的结构示意图；
图8是本申请一实施例的电池包出液管的结构示意图；
图9是本申请一实施例的冷却流道的结构示意图；
图10是本申请一实施例的电池簇的正面示意图。
本发明的较佳实施方式
为让本申请的上述目的、特征和优点能更明显易懂，以下结合附图对本申请的具体实施方式作详细说明。
在下面的描述中阐述了很多具体细节以便于充分理解本申请，但是本申请还可以采用其它不同于在此描述的其它方式来实施，因此本申请不受下面公开的具体实施例的限制。
如本申请和权利要求书中所示，除非上下文明确提示例外情形，“一”、“一个”、“一种”和/或“该”等词并非特指单数，也可包括复数。一般说来，术语“包括”与“包含”仅提示包括已明确标识的步骤和元素，而这些步骤和元素不构成一个排它性的罗列，方法或者设备也可能包含其他的步骤或元素。
在详述本申请实施例时，为便于说明，表示器件结构的剖面图会不依一般比例作局部放大，而且所述示意图只是示例，其在此不应限制本申请保护的范围。此外，在实际制作中应包含长度、宽度及深度的三维空间尺寸。
为了方便描述，此处可能使用诸如“之下”、“下方”、“低于”、“下面”、“上方”、“上”等等的空间关系词语来描述附图中所示的一个元件或特征与其他元件或特征的关系。将理解到，这些空间关系词语意图包含使用中或操作中的器件的、除了附图中描绘的方向之外的其他方向。例如，如果翻转附图中的器件，则被描述为在其他元件或特征“下方”或“之下”或“下面”的元件的方向将改为在所述其他元件或特征的“上方”。因而，示例性的词语“下方”和“下面”能够包含上和下两个方向。器件也可能具有其他朝向(旋转90度或处于其他方向)，因此应相应地解释此处使用的空间关系描述词。此外，还将理解，当一层被称为在两层“之间”时，它可以是所述两层之间仅有的层，或者也可以存在一个或多个介于其间的层。
在本申请的上下文中，所描述的第一特征在第二特征之“上”的结构可以包括第一和第二特征形成为直接接触的实施例，也可以包括另外的特征形成在第一和第二特征之间的实施例，这样第一和第二特征可能不是直接接触。
此外，需要说明的是，使用“第一”、“第二”等词语来限定零部件，仅仅是为了便于对相应零部件进行区别，如没有另行声明，上述词语并没有特殊含义，因此不能理解为对本申请保护范围的限制。
接下来通过具体的实施例对本申请的液冷管路、液冷系统以及储能设备进行说明。
图1所示是本申请一实施例的液冷管路以及其冷却的储能设备，储能设备包括5个电池簇200，图2所示是图1中虚线框部分的电池簇的结构示意图，电池簇由8个电池包210依次堆叠而成。可以理解，电池簇以及电池包的数量可以根据实际需求调整，并不限于上述实施例。
图3至图5是本申请一实施例的进液管路中不同部件的结构示意图，图6至图8是本申请一实施例的出液管路中不同部件的结构示意图。现结合图1至图8所示，对本申请的液冷管路进行说明。
在本申请的一实施例中，液冷管路包括进液管路和出液管路。参考图1至图5所示，进液管路包括进液总管110、5个电池簇进液管120和8个电池包进液管130。进液总管110整体上大体沿着水平方向延伸。电池簇进液管120整体上大体沿着垂直方向延伸，且各电池簇进液管120之间间隔排布。
参考图3所示，进液总管110具有进液口111和5个出液口112。其中，进液口111是冷却液的入口，冷却液从进液口111进入到液冷总管中。进液口111可用于与冷却液输入装置的液体输出端连接，以向液冷总管输入冷却液。在本申请的一实施例中，进液总管110包括第一进液总管113和第二进液总管114。第一进液总管113为柔性材料，进液总管110的进液口111位于第一进液总管113远离第二进液总管114的一端。采用柔性材料的第一进液总管113，并将进液口111设置在第一进液总管113的一端，有助于进液总管110与冷却液输入装置的液体输出端紧密连接，防止冷却液泄露，并且可以避免因进液总管110热胀冷缩导致进液总管110破裂。在一些实施例中，第一进液总管为橡胶软管，第二进液总管为金属管。
在一些实施例中，进液总管110上包覆有有保温层，防止凝露现象产生。
可以理解，进液总管的出液口的数量可以根据实际需求进行调整。例如，在图1所示的实施例中，共有5个电池簇200，此时进液总管110上设置有5个出液口112。在其他的实施例中，出液口112的数量还可以是其他数字，例如3个、7个或8个，上述实施例不构成对本申请中出液口数量的限制。本说明同样适用于下文中有关数量的实施例，将不再展开说明。
在本申请的一实施例中，进液总管110的若干个出液口112的内径沿液体流动方向(图3中箭头所示)增大。需要说明的是，出液口112的内径沿液体流动方向增大包括以下几种情况。一种是出液口112的内径沿液体流动方向依次增大，符合严格递增函数。另一种是出液口112的内径沿液体流动方向的增大符合递增函数，但是部分相邻出液口112的内径相同。例如，部分靠近进液总管110进液口111的出液口112的内径相同，但小于部分远离进液口111的出液口112的内径。冷却液在进液总管内流动的过程中，由于摩擦力等因素，会导致冷却液的流速减小。通过将出液口的内径设置为沿液体流动方向增大可以平衡进入到不同电池簇进液管内冷却液的流速，使得进入到不同电池簇中的冷却液的流速相同，有利于避免系统内温差较大的现象。
图4所示是本申请一实施例的电池簇进液管的结构示意图，参考图4所示。每个电池簇进液管120具有进液口121和8个出液口122。结合图3和图4所示，进液总管110的每个出液口112分别与一个电池簇进液管120的进液口 121连接。
在本申请的一实施例中，每个电池簇进液管120的若干个出液口122的内径沿液体流动方向(图4中箭头所示)减小。需要说明的是，“电池簇进液管120的若干个出液口121的内径沿液体流动方向减小”的含义与“进液总管110的若干个出液口112的内径沿液体流动方向增大”的含义类似，包括递减和严格递减两种情况，在此不再展开。由于重力等因素的作用，冷却液在沿电池簇进液管从上到下流动的过程中，其流动速度会加快，通过将电池簇进液管的出液口的内径设置为沿液体流动方向减小有助于提高液冷管路的均温性。
图5所示是本申请一实施例的电池包进液管的结构示意图，参考图5所示。每个电池包进液管130具有进液口131和2个出液口132。结合图4和图5所示，电池簇进液管120的每个出液口122分别与一个电池包进液管130的进液口131连接。
在本申请的一实施例中，电池包进液管130还包括主体管路133和两个支路管路134。两个支路管路134的一端通过一个三通接头135与主体管路133连接，两个出液口132分别位于两个支路管路134的另一端。主体管路133和两个支路管路134可以均是尼龙管。尼龙管具有一定的柔性，易于弯曲变形，特别适用于环境复杂的环境。
为进一步理解本实用新中进液总管、电池簇进液管和电池包进液管之间的连接方式，这里给出一个更为详细的非限制性的示例。
首先，参考图3和图4所示，进液总管110的出液口112分别与一个电池簇进液管120的进液口121连接。在一些实施例中，电池簇进液管120的进液口121为快插接口，快插接口可以快速地与进液总管110的出液口112连接。
接着，参考图4和图5所示，电池簇进液管120的出液口122分别一个电池包进液管130的进液口131连接。在一些实施例中，电池簇进液管120的出液口122实施为三通接头，三通接头之间连接着波纹管123。
如此，冷却液从进液总管110的进液口111进入到进液总管110后，随后冷却液从与进液总管110的出液口112连接的电池簇进液管120的进液口121进入到电池簇进液管120中，再后，冷却液从与电池簇进液管120的出液口122连接的电池包进液管130的进液口131进入到电池包进液管130中。
接下来通过实施例介绍出液管路。参考图6至图8所示，出液管路包括出液总管140、5个电池簇出液管150和8个电池包出液管160。出液总管140整体上大体沿着水平方向延伸。电池簇出液管150整体上大体沿着垂直方向延伸，且各电池簇出液管160之间间隔排布。
图6所示是本申请一实施例的出液总管的结构示意图。参考图6所示，出液总管具有出液口142和5个进液口141。出液口141可用于与冷却液输入装置连接，以回收冷却液。
在一些实施例中，出液总管140包括第一出液总管143和第二出液总管144，该第一出液总管143为柔性材料，出液总管140的出液口位于第一出液总管143远离第二出液总管144的一端。采用柔性材料的第一出液总管143，并将进液口141设置在第一出液总管143的一端，有助于出液总管140与冷却液输入装置的液体输出端紧密连接，防止冷却液泄露，并且可以避免因出液总管140热胀冷缩导致出液总管140破裂。在一些实施例中，第一出液总管为橡胶软管，第二出液总管为金属管。
在一些实施例中，出液总管110上包覆有有保温层，防止凝露现象产生。
在一些实施例中，出液总管的若干个进液口的内径均不小于进液总管的若干个出液口的最大内径。如此，可以减少冷却液回流的阻力。
图7是本申请一实施例的电池簇出液管的结构示意图。参考图7所示，每个电池簇出液管150具有出液口151、位于电池簇出液管150顶部的排气阀152和5个进液口153。电池簇出液管150的每个出液口151分别与出液总管140的进液口141连接。在一些实施例中，进液口141为快插接口，方便与出液口151的快速连接。在液冷管路工作前，需要向液冷管路内填充冷却液。在填充冷却液时，位于液冷管路内的大部分气体会被冷却液挤压排除到液冷管路外，但仍会有少部分的气体被高速进入的冷却液包裹，从而在冷却液内形成气泡。此外，在液冷管路工作的过程中也会产生气体，这些气体也可能因为无法排出而残留在冷却管道内。残留在冷却液中的气泡会导致液冷管路中局部温度过高。本申请的发明人发现，由于重力原因，冷却管内的残留的气体会汇聚到各个电池簇进液管的顶部，与在进液总管上设置排气阀相比，本申请的实施例在每个电池簇进液管的顶部设置排气阀，可以有效地排出残留在冷却液内的气体，从 而避免因残留在冷却液中的气体导致的液冷管路局部过热。
图8是本申请一实施例的电池包出液管的结构示意图。每个电池包出液管160具有出液口161和两个进液口162。该电池包出液管160的出液口161与电池簇出液管150的进液口153连接。
在本申请的一实施例中，液冷管路还包括至少两个冷却流道。参考图9所示的本申请一实施例的冷却流道的结构示意图，该实施例中具有两个冷却流道190，每个冷却流道190具有进液口191和出液口192，其中，进液口191与电池包进液管130的出液口132连接，出液口192与电池包出液管160的进液口162连接，相邻的冷却流道190里的冷却液的流动方向相反。结合图2所示，冷却流道190设置在电池包210内，通过流经冷却流道190内的冷却液对电池包210进行散热处理。通过布置冷却流道的排布使得相邻的冷却流道中的冷却液的流向相反有助于提高电池包的均温性。
在一些实施例中，沿电池簇进液管中液体的流动方向，冷却流道的进液口的内径大于出液口的内径。参考图10所示的本申请一实施例的电池簇的正面示意图。为方便理解本申请中对冷却流道的进液口和出液口内径的设置，这里给出一个非限制性的实施例：
在该实施例中，电池簇200具有依次堆叠的8个电池包210，每个电池包内均具有两个冷却流道，冷却流道190的进液口191和出液口192位于电池包210的外部。冷却液从进液口191进入到电池包210内的冷却流道，从出液口192流出。位于电池簇200上部的4层电池包210中的冷却流道190的进液口191和出液口192的内径一致。中间两层电池包210的出液口192的内径与上述四层电池包210中的冷却流道190的出液口192的内径一致，该两层中的进液口191的内径比出液口192的内径小。最下边两层电池包210中的进液口191的内径与出液口192的内径一致，且内径大小与中间两层电池包210的进液口191的内径大小一致。有助于保证电池包的均温性。
为方便理解本申请中冷却液的流动路径，这里给出一个非限制性的实施例。参考图2至图9所示，从进液总管110的进液口111进入到进液总管110中的冷却液，先流经电池簇进液管120，再流到电池包进液管130中，接着通过与电池包进液管120连接的冷却流道190的进液口191进入到冷却流道190内， 对电池包210进行冷却。随后，冷却液由冷却管道190流出进入到电池包出液管160，之后经电池簇出液管150进入到出液总管140，最后经出液总管140的出液口141流出。
本申请的液冷管路通过将出液总管的出液口在液体流动的方向上设置为增大，以及将电池簇进液管的出液口设置为沿液体流动方向减小，有助于提高液冷管路的均温性。此外，通过在每个电池簇进液管的顶部设置排气阀可以有效地排出液体中的气体，提高液冷管路的均温性。
回到图1所示，本申请还提出一种用于储能系统的液冷系统。该液冷系统包括如前文所述的液冷管路和液冷机220，液冷机220与进液总管进液口和出液总管出液口连接。上述液冷机一方面可用以为冷却液提供动力，另一方方面可以降低冷却液的温度。
本申请还提出一种储能设备，包括如前文所述的液冷系统。
本申请的用于储能系统的液冷系统以及储能设备具有提高冷却管路均温性的效果。
上文已对基本概念做了描述，显然，对于本领域技术人员来说，上述申请披露仅仅作为示例，而并不构成对本申请的限定。虽然此处并没有明确说明，本领域技术人员可能会对本申请进行各种修改、改进和修正。该类修改、改进和修正在本申请中被建议，所以该类修改、改进、修正仍属于本申请示范实施例的精神和范围。
同时，本申请使用了特定词语来描述本申请的实施例。如“一个实施例”、“一实施例”、和/或“一些实施例”意指与本申请至少一个实施例相关的某一特征、结构或特点。因此，应强调并注意的是，本说明书中在不同位置两次或多次提及的“一实施例”或“一个实施例”或“一替代性实施例”并不一定是指同一实施例。此外，本申请的一个或多个实施例中的某些特征、结构或特点可以进行适当的组合。
一些实施例中使用了描述成分、属性数量的数字，应当理解的是，此类用于实施例描述的数字，在一些示例中使用了修饰词“大约”、“近似”或“大体上”来修饰。除非另外说明，“大约”、“近似”或“大体上”表明所述数字允许有±20％的变化。相应地，在一些实施例中，说明书和权利要求中使用的数值参 数均为近似值，该近似值根据个别实施例所需特点可以发生改变。在一些实施例中，数值参数应考虑规定的有效数位并采用一般位数保留的方法。尽管本申请一些实施例中用于确认其范围广度的数值域和参数为近似值，在具体实施例中，此类数值的设定在可行范围内尽可能精确。

Claims (10)

  1. 一种用于储能系统的液冷管路，其特征在于，包括：
    进液管路，包括进液总管、若干个电池簇进液管和若干个电池包进液管，所述进液总管具有进液口和若干个出液口，每个所述电池簇进液管具有进液口和若干个出液口，每个所述电池包进液管具有进液口和若干个出液口，所述进液总管的每个出液口分别与一个所述电池簇进液管的进液口连接，所述电池簇进液管的每个出液口分别与一个所述电池包进液管的进液口连接；以及
    出液管路，包括出液总管、若干个电池簇出液管和若干个电池包出液管，所述出液总管具有出液口和若干个进液口，每个所述电池簇出液管具有出液口、位于所述电池簇出液管顶部的排气阀和若干个进液口，每个所述电池包出液管具有出液口和若干个进液口，其中，所述电池包出液管的每个出液口分别与一个所述电池簇出液管的进液口连接，所述电池簇出液管的每个出液口分别与所述出液总管的进液口连接。
  2. 如权利要求1所述的液冷管路，其特征在于，还包括至少两个冷却流道，每个所述冷却流道具有进液口和出液口，所述冷却流道的进液口与所述电池包进液管的出液口连接，所述冷却流道的出液口与所述电池包出液管的进液口连接，其中，相邻的所述冷却流道里的冷却液的流动方向相反。
  3. 如权利要求2所述的液冷管路，其特征在于，沿所述电池簇进液管中液体的流动方向，所述冷却流道的进液口的内径小于或等于出液口的内径。
  4. 如权利要求1所述的液冷管路，其特征在于，每个所述电池簇进液管的若干个出液口的内径沿液体流动方向减小。
  5. 如权利要求1所述的液冷管路，其特征在于，所述出液总管的若干个进液口的内径均不小于所述进液总管的若干个出液口的最大内径。
  6. 如权利要求1所述的液冷管路，其特征在于，所述进液总管的若干个出液口的内径沿液体流动方向增大。
  7. 如权利要求1所述的液冷管路，其特征在于，所述进液总管包括第一进液总管和第二进液总管，所述第一进液总管为柔性材料，所述进液总管的进液口位于所述第一进液总管远离所述第二进液总管的一端。
  8. 如权利要求7所述的液冷管路，其特征在于，所述出液总管包括第一出液 总管和第二出液总管，所述第一出液总管为柔性材料，所述出液总管的出液口位于所述第一出液总管远离所述第二出液总管的一端。
  9. 一种用于储能系统的液冷系统，其特征在于，包括如权利要求1-8任一项所述的液冷管路和液冷机，所述液冷机与所述进液总管进液口和出液总管出液口连接。
  10. 一种储能设备，其特征在于，包括如权利要求9所述的液冷系统。
PCT/CN2023/086381 2022-05-12 2023-04-06 用于储能系统的液冷管路、液冷系统以及储能设备 WO2023216775A1 (zh)

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