CN221977637U - A chemical battery energy storage DC side connection cable - Google Patents
A chemical battery energy storage DC side connection cable Download PDFInfo
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- CN221977637U CN221977637U CN202420775113.8U CN202420775113U CN221977637U CN 221977637 U CN221977637 U CN 221977637U CN 202420775113 U CN202420775113 U CN 202420775113U CN 221977637 U CN221977637 U CN 221977637U
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- 238000004146 energy storage Methods 0.000 title claims abstract description 23
- 239000000126 substance Substances 0.000 title claims abstract description 21
- 239000004020 conductor Substances 0.000 claims abstract description 96
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 34
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052802 copper Inorganic materials 0.000 claims abstract description 24
- 239000010949 copper Substances 0.000 claims abstract description 24
- 230000006835 compression Effects 0.000 claims abstract description 5
- 238000007906 compression Methods 0.000 claims abstract description 5
- 229920001971 elastomer Polymers 0.000 claims description 7
- 239000000806 elastomer Substances 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 7
- 238000005452 bending Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 abstract description 4
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 101001121408 Homo sapiens L-amino-acid oxidase Proteins 0.000 description 2
- 102100026388 L-amino-acid oxidase Human genes 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 235000006650 Syzygium cordatum Nutrition 0.000 description 1
- 240000005572 Syzygium cordatum Species 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- -1 halogen-free Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- Non-Insulated Conductors (AREA)
Abstract
Description
技术领域Technical Field
本实用新型涉及一种直流电缆，尤其是一种用于化学电池储能系统中直流侧的连接电缆。The utility model relates to a DC cable, in particular to a connecting cable used for the DC side of a chemical battery energy storage system.
背景技术Background Art
在电池储能系统中，需要使用1500V或1000V直流连接电缆来连接直流侧的电池模块与电池模块、电池簇与电池簇、电池簇与汇流箱及电池簇与储能变流器。由于连接电缆工作的空间狭小，电缆要在小半径弯曲状态下长时间工作，需要连接电缆具有较高的弯曲性能，电缆外径≤25mm时，电缆的最小弯曲半径达到4D，电缆外径>25mm时，电缆的最小弯曲半径达到6D，为了满足连接电缆对弯曲性能的要求，现有技术中的连接电缆均采用细铜单束绞导体。但是，这种采用束绞导体的连接电缆存在以下几方面缺陷：一、束绞导体内部的各单丝之间存在间隙，空气中的水蒸气很容易沿单丝之间的间隙进入到连接电缆内部形成水树，影响电缆的性能，尤其是电池内的电解液也很容易沿单丝之间的间隙进入到连接电缆内部腐蚀导体，缩短导体的使用寿命。二、连接电缆在连接电池时长度通常不超过500mm，当这种短连接电缆小半径弯曲时，束绞导体表面的单丝容易突出导体表面，使束绞导体呈现松股变形状态，为了避免束绞导体松股变形就得提高绞入率，而绞入率提高会直接增加原料成本。三、束绞导体内各单丝之间的摩擦力较大，使得小半径弯曲连接电缆时的阻力较大，且在弯曲过程中容易造成单丝表面损伤，影响导体的电气性能。In the battery energy storage system, a 1500V or 1000V DC connecting cable is required to connect the battery modules and battery modules, battery clusters and battery clusters, battery clusters and junction boxes, and battery clusters and energy storage converters on the DC side. Since the working space of the connecting cable is small, the cable must work for a long time in a small radius bending state, and the connecting cable needs to have high bending performance. When the outer diameter of the cable is ≤25mm, the minimum bending radius of the cable reaches 4D, and when the outer diameter of the cable is >25mm, the minimum bending radius of the cable reaches 6D. In order to meet the requirements of the bending performance of the connecting cable, the connecting cables in the prior art all use fine copper single bundle twisted conductors. However, this type of connecting cable using bundled twisted conductors has the following defects: First, there are gaps between the single wires inside the bundled twisted conductor, and water vapor in the air can easily enter the connecting cable along the gaps between the single wires to form water trees, affecting the performance of the cable, especially the electrolyte in the battery can easily enter the connecting cable along the gaps between the single wires to corrode the conductor and shorten the service life of the conductor. Second, the length of the connecting cable when connecting the battery is usually no more than 500mm. When such a short connecting cable is bent with a small radius, the single wires on the surface of the bundled conductor are easy to protrude from the conductor surface, causing the bundled conductor to be loose and deformed. In order to avoid the loose deformation of the bundled conductor, the twisting rate must be increased, and the increase in the twisting rate will directly increase the cost of raw materials. Third, the friction between the single wires in the bundled conductor is large, which makes the resistance of the connecting cable when bending with a small radius large, and it is easy to cause damage to the surface of the single wire during the bending process, affecting the electrical performance of the conductor.
实用新型内容Utility Model Content
实用新型要解决的技术问题是：提供一种化学电池储能直流侧连接电缆，该化学电池储能直流侧连接电缆使用过程中水或电池液体不会进入导体内部对导体造成侵害，该连接电缆的使用寿命长，且电阻小，该连接电缆还具有弯曲阻力小、易于弯曲施工的优点。The technical problem to be solved by the utility model is to provide a chemical battery energy storage DC side connecting cable. During the use of the chemical battery energy storage DC side connecting cable, water or battery liquid will not enter the conductor to cause damage to the conductor. The connecting cable has a long service life and low resistance. The connecting cable also has the advantages of low bending resistance and easy bending construction.
解决技术问题所采取的技术方案：一种化学电池储能直流侧连接电缆，包括导体和挤包在导体外的绝缘层，在绝缘层的外表面还挤包有护套层，所述导体包括由铜单丝束绞而成的束绞导体，在束绞导体内部各铜单丝之间的空隙内填充有高纯石墨粉。The technical solution adopted to solve the technical problem is: a chemical battery energy storage DC side connecting cable, including a conductor and an insulating layer extruded outside the conductor, a sheath layer is also extruded on the outer surface of the insulating layer, the conductor includes a stranded conductor formed by twisting copper monofilaments, and the gaps between the copper monofilaments inside the stranded conductor are filled with high-purity graphite powder.
作为本实用新型的进一步改进方案：所述导体为填充石墨粉后的束绞导体经过径向紧压处理形成的紧压圆形导体。As a further improvement of the utility model: the conductor is a compressed circular conductor formed by radially compressing a bundle of twisted conductors filled with graphite powder.
作为本实用新型的进一步改进方案：紧压圆形导体的直径为紧压前束绞导体直径的0.94—0.98倍。As a further improvement of the utility model: the diameter of the compressed circular conductor is 0.94-0.98 times the diameter of the bundled stranded conductor before compression.
作为本实用新型的进一步改进方案：在束绞导体表面还设有将构成束绞导体的铜单丝束缚在一起的紧束层，所述紧束层为由铜丝编织成的铜丝织筒。As a further improvement of the utility model: a tightening layer for binding together the copper monofilaments constituting the twisted conductor is further provided on the surface of the twisted conductor, and the tightening layer is a copper wire braided tube braided from copper wires.
作为本实用新型的进一步改进方案：所述高纯石墨粉为目数大于200的高纯石墨粉。As a further improvement of the present invention: the high-purity graphite powder is a high-purity graphite powder with a mesh size greater than 200.
作为本实用新型的进一步改进方案：所述铜单丝的直径为0.2—0.4mm。As a further improvement of the present invention: the diameter of the copper monofilament is 0.2-0.4 mm.
作为本实用新型的进一步改进方案：所述护套层为交联型弹性体护套层，在交联型弹性体护套层的外壁以导体中心为圆心等间角排列有多条凸出于交联型弹性体护套层外圆柱面的纵向防护筋。As a further improvement of the utility model: the sheath layer is a cross-linked elastomer sheath layer, and a plurality of longitudinal protective ribs protruding from the outer cylindrical surface of the cross-linked elastomer sheath layer are arranged at equal angles on the outer wall of the cross-linked elastomer sheath layer with the center of the conductor as the center.
有益效果：本实用新型的化学电池储能直流侧连接电缆，由于采用了所述导体包括由铜单丝束绞而成的束绞导体，在束绞导体内部各铜单丝之间的空隙内填充有高纯石墨粉的技术特征，通过在束绞导体各铜单丝之间的空隙内填充石墨粉，减小了导体内部可以浸入水或电池液体的空间，可以有效防止水或电池液体进入导体内部而腐蚀导体，影响导体的性能，缩短连接电缆的使用寿命，同时，利用石墨的润滑特性，可以有效降低连接缆弯曲过程中各单丝之间的摩擦力，使电缆施工时更易于弯曲、更省力，此外，填充在空隙内的石墨粉还具有导电和传热效果，不但可以降低导体的电阻，还可以提高导体的导热性能，使导体内部产生的热量及时向表面及两端传导，有利于降低连接电缆的工作温度。由于采用了所述导体为将填充石墨粉后的束绞导体经过径向紧压处理形成的紧压圆形导体的技术特征，一方面可以将石墨粉自身压实，提高石墨粉的导电性能，另一方面还可以使石墨粉与单丝接触更紧密、导热性更好。由于合理地限定了紧压圆形导体直径与紧压前束绞导体直径的倍数关系，在保证将石墨压实的前提下尽可能减小单丝受挤压产生的塑性变形，降低紧压对导体柔韧性的影响。由于采用了在束绞导体表面还设有将构成束绞导体的铜单丝束缚在一起的紧束层，所述紧束层为由铜丝编织成的铜丝织筒的技术特征，可以避免由于绞入率低导致的电缆弯曲时容易造成束绞导体松股、石墨粉外溢等弊端，铜丝织筒在对单丝进行束缚的同时具有导体的功能，可以增加导体的截面积。由于合理地限定了所述高纯石墨粉的目数，使得石墨填充的更紧实，导电和导热效果更好。由于采用了在绝缘层的外表面还挤包有交联型弹性体护套层的技术特征，使本实用新型的化学电池储能直流侧连接电缆防护性能更强，能够适用多种环境的使用要求。Beneficial effects: The chemical battery energy storage DC side connecting cable of the utility model adopts the technical feature that the conductor includes a stranded conductor formed by twisting copper monofilaments, and the gaps between the copper monofilaments inside the stranded conductor are filled with high-purity graphite powder. By filling the gaps between the copper monofilaments of the stranded conductor with graphite powder, the space inside the conductor that can be immersed in water or battery liquid is reduced, which can effectively prevent water or battery liquid from entering the conductor and corroding the conductor, affecting the performance of the conductor and shortening the service life of the connecting cable. At the same time, the lubricating properties of graphite can be used to effectively reduce the friction between the monofilaments during the bending process of the connecting cable, making the cable easier to bend and more labor-saving during construction. In addition, the graphite powder filled in the gap also has conductive and heat transfer effects, which can not only reduce the resistance of the conductor, but also improve the thermal conductivity of the conductor, so that the heat generated inside the conductor is promptly conducted to the surface and both ends, which is beneficial to reducing the operating temperature of the connecting cable. Due to the technical feature that the conductor is a compacted circular conductor formed by radially compacting the bundled conductor filled with graphite powder, on the one hand, the graphite powder itself can be compacted to improve the conductivity of the graphite powder, and on the other hand, the graphite powder can be in closer contact with the monofilament and have better thermal conductivity. Due to the reasonable definition of the multiple relationship between the diameter of the compacted circular conductor and the diameter of the bundled conductor before compaction, the plastic deformation of the monofilament caused by extrusion is minimized as much as possible under the premise of ensuring that the graphite is compacted, and the influence of compaction on the flexibility of the conductor is reduced. Due to the technical feature that a compact layer is provided on the surface of the bundled conductor to bind the copper monofilaments constituting the bundled conductor together, and the compact layer is a copper wire braided tube woven from copper wire, the disadvantages of loose strands of the bundled conductor and overflow of graphite powder when the cable is bent due to the low twisting rate can be avoided. The copper wire braided tube has the function of a conductor while binding the monofilament, and can increase the cross-sectional area of the conductor. Due to the reasonable definition of the mesh number of the high-purity graphite powder, the graphite filling is more compact, and the electrical and thermal conductivity effects are better. Due to the technical feature that a cross-linked elastomer sheath layer is extruded on the outer surface of the insulation layer, the chemical battery energy storage DC side connecting cable of the utility model has stronger protection performance and can meet the use requirements of various environments.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
下面结合附图对本实用新型的化学电池储能直流侧连接电缆作进一步的详细说明。The chemical battery energy storage DC side connecting cable of the utility model is further described in detail below in conjunction with the accompanying drawings.
图1是本实用新型的化学电池储能直流侧连接电缆的径向截面示意图。FIG1 is a schematic diagram of a radial cross section of a chemical battery energy storage DC side connecting cable of the utility model.
具体实施方式DETAILED DESCRIPTION
如图1所示，本实用新型的化学电池储能直流侧连接电缆，包括导体和挤包在导体外的绝缘层4，所述导体包括由铜单丝1束绞而成的束绞导体，在束绞导体内部各铜单丝之间的空隙内填充有高纯石墨粉2，所述高纯石墨粉为目数大于200的高纯石墨粉。As shown in Figure 1, the chemical battery energy storage DC side connecting cable of the utility model includes a conductor and an insulating layer 4 extruded outside the conductor, the conductor includes a bundled conductor formed by twisting copper monofilaments 1, and the gaps between the copper monofilaments inside the bundled conductor are filled with high-purity graphite powder 2, and the high-purity graphite powder is a high-purity graphite powder with a mesh size greater than 200.
优选地，所述导体为填充石墨粉后的束绞导体经过径向紧压处理形成的紧压圆形导体，紧压圆形导体的直径为紧压前束绞导体直径的0.94—0.98。Preferably, the conductor is a compressed circular conductor formed by radially compressing a bundle of stranded conductors filled with graphite powder, and the diameter of the compressed circular conductor is 0.94-0.98 of the diameter of the bundle of stranded conductors before compressing.
优选地，在束绞导体表面还设有将构成束绞导体的铜单丝束缚在一起的紧束层，所述紧束层为由铜丝编织成的铜丝织筒3，构成铜丝织筒的铜丝直径小于或等于构成束绞导体的铜单丝直径。铜丝织筒束缚在紧压圆形导体外，可以有效防止电缆弯曲时导体松股，使紧压圆形导体在时始终保持圆形。Preferably, a tightening layer is provided on the surface of the bundled conductor to bind the copper monofilaments constituting the bundled conductor together, and the tightening layer is a copper wire braided tube 3 woven from copper wires, and the diameter of the copper wire constituting the copper wire braided tube is less than or equal to the diameter of the copper monofilaments constituting the bundled conductor. The copper wire braided tube is bound outside the compact circular conductor, which can effectively prevent the conductor from loosening when the cable is bent, so that the compact circular conductor always remains round.
所述铜单丝的直径为0.2—0.4mm。The diameter of the copper monofilament is 0.2-0.4 mm.
优选地，在绝缘层的外表面还挤包有交联型弹性体护套层5，在交联型弹性体护套层的外壁设有多条凸出于交联型弹性体护套层外圆柱面的纵向防护筋51，多条纵向防护筋在交联型弹性体护套层的外壁以导体中心为圆心等间角排列。图1所示实施例为在交联型弹性体护套层的外圆柱面设6条纵向防护筋。交联型弹性体护套层外壁的纵向防护筋可以对护套层进行补强，提高了护套层的抗裂性能，使交联型弹性体护套层长时间处于小半径弯曲状态也不会发生断裂，并且，防护筋还可以防止施工作业过程中对护套层基体造成机械损伤而形成安全隐患，提高了连接电缆的耐挤压、耐碰撞的能力。所述绝缘层优选为低烟无卤阻燃交联聚烯烃绝缘层，在绝缘层的外圆周面以导体中心为圆心等间角排列有多条凸棱41，从而使绝缘层与护套层的结合面在电缆的径向截面上呈齿轮形，所述凸棱为半圆形截面凸棱，在相邻的半圆形截面凸棱之间设有半圆形截面凹槽42，多条凸棱在绝缘层的外圆周面呈多头螺旋排列。Preferably, a cross-linked elastomeric sheath layer 5 is also extruded on the outer surface of the insulating layer, and a plurality of longitudinal protective ribs 51 protruding from the outer cylindrical surface of the cross-linked elastomeric sheath layer are provided on the outer wall of the cross-linked elastomeric sheath layer, and the plurality of longitudinal protective ribs are arranged at equal angles with the center of the conductor as the center of the circle on the outer wall of the cross-linked elastomeric sheath layer. The embodiment shown in FIG1 is that 6 longitudinal protective ribs are provided on the outer cylindrical surface of the cross-linked elastomeric sheath layer. The longitudinal protective ribs on the outer wall of the cross-linked elastomeric sheath layer can reinforce the sheath layer, improve the crack resistance of the sheath layer, and make the cross-linked elastomeric sheath layer in a small radius bending state for a long time without breaking. In addition, the protective ribs can also prevent the sheath layer matrix from being mechanically damaged during the construction process to form a safety hazard, thereby improving the extrusion resistance and collision resistance of the connecting cable. The insulating layer is preferably a low-smoke, halogen-free, flame-retardant cross-linked polyolefin insulating layer, and a plurality of ridges 41 are arranged at equal angles with the center of the conductor as the center on the outer circumferential surface of the insulating layer, so that the joint surface between the insulating layer and the sheath layer is gear-shaped on the radial cross-section of the cable, and the ridges are semicircular ridges, and semicircular grooves 42 are provided between adjacent semicircular ridges, and the plurality of ridges are arranged in a multi-start spiral on the outer circumferential surface of the insulating layer.
本实用新型的化学电池储能直流侧连接电缆生产时，采用束绞导体在石墨粉池内成缆的方式使石墨粉在绞合过程中直接填充到各铜单丝之间的间隙内，然后再对束绞导体进行紧压，紧压后再在紧压圆形导体外束缚铜丝织筒，最后再采用常规方式在导体外挤包绝缘，根据需要在绝缘外挤包护套。When producing the chemical battery energy storage DC side connection cable of the utility model, a bundle of twisted conductors is cabled in a graphite powder pool so that the graphite powder is directly filled into the gaps between the copper monofilaments during the twisting process, and then the bundle of twisted conductors is tightly compressed. After compression, a copper wire braided tube is bound outside the compressed circular conductor, and finally, insulation is extruded outside the conductor in a conventional manner, and a sheath is extruded outside the insulation as needed.
本实用新型的化学电池储能直流侧连接电缆适用于导体截面积4平方毫米以上、工作电压1500V以下的直流连接电缆。The chemical battery energy storage DC side connecting cable of the utility model is suitable for DC connecting cables with a conductor cross-sectional area of more than 4 square millimeters and a working voltage of less than 1500V.
Claims (7)
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| CN202420775113.8U CN221977637U (en) | 2024-04-16 | 2024-04-16 | A chemical battery energy storage DC side connection cable |
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| CN221977637U true CN221977637U (en) | 2024-11-08 |
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