WO2022095812A1 - 一种柔性锂电池组的制备方法 - Google Patents

一种柔性锂电池组的制备方法 Download PDF

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Publication number
WO2022095812A1
WO2022095812A1 PCT/CN2021/127823 CN2021127823W WO2022095812A1 WO 2022095812 A1 WO2022095812 A1 WO 2022095812A1 CN 2021127823 W CN2021127823 W CN 2021127823W WO 2022095812 A1 WO2022095812 A1 WO 2022095812A1
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Prior art keywords
lithium battery
battery pack
flexible
central tube
preparing
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PCT/CN2021/127823
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English (en)
French (fr)
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吕永安
阮克荣
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厦门致力金刚石科技股份有限公司
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Publication of WO2022095812A1 publication Critical patent/WO2022095812A1/zh

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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
    • 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
    • H01M10/058—Construction or manufacture
    • 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
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • 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
    • H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the invention relates to the field of lithium batteries, in particular to a preparation method of a flexible lithium battery pack.
  • Lithium battery refers to a battery containing lithium (including metal lithium, lithium alloys, lithium ions, and lithium polymers) in an electrochemical system.
  • Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium ion batteries.
  • Lithium metal batteries are generally non-rechargeable and contain lithium in a metallic state.
  • Lithium-ion batteries do not contain lithium in the metallic state and are rechargeable.
  • the existing lithium batteries usually refer to rechargeable lithium ion batteries.
  • the used lithium battery components usually combine multiple lithium battery cells in series and parallel to achieve a suitable output power supply. If the body is spliced and assembled separately, it has defects such as difficult packaging and poor heat dissipation. Changes are required.
  • the present invention provides a method for preparing a flexible lithium battery pack, and the lithium battery pack prepared by the method can effectively improve the above problems.
  • a preparation method of a flexible lithium battery pack comprising the following steps:
  • A1 provide a central tube, insert the central tube into the cell
  • A2 provide a flexible covering film, and cover the outer surface of the battery cell with the flexible covering film;
  • A3 sealing the lateral opening, the upper opening and the lower opening of the flexible covering film to form a lithium battery cell; wherein, the center hole of the central tube is exposed when the upper opening and the lower opening of the flexible covering film are sealed ;
  • A4 provide a connecting cord, and pass the connecting cord through the central tube of a plurality of lithium battery cells to form a lithium battery pack.
  • connection cord is an independent cord, and the connection cord passes through the central tubes of a plurality of lithium battery cells in sequence to form a linear lithium battery pack.
  • step A4 the number of the connection cords is multiple, the multiple connection cords form a mesh structure, and the connection cords of each interlacing point are formed by passing through the central tube of the lithium battery cell to form a fixed structure. , and then form a mesh-shaped lithium battery pack.
  • step A5 of electrically connecting a plurality of lithium battery cells of the same lithium battery pack.
  • the materials of the central tube and the connecting wire are both thermally conductive materials, and the connecting wire is in thermal contact with the central tube.
  • the connecting wire rope is a metal wire rope, specifically a steel wire rope.
  • the central pipe is a metal pipe or a heat conducting hose.
  • the flexible covering film is an aluminum-plastic film.
  • step A1 the number of central tubes inserted into the cell is one or more.
  • the preparation method is simple in process and easy to implement.
  • the lithium battery pack prepared by this method has the following advantages:
  • the central tube and the connecting wire can be made of thermally conductive material.
  • the heat emitted by the lithium battery can be conducted to the connecting wire through the central tube, and then dissipated through the connecting wire, adding a heat dissipation channel, and the heat conduction and heat dissipation effect are better;
  • the lithium battery pack is connected by a connecting cord, which has good overall flexibility and can be arranged in different shapes for assembly, with good applicability;
  • the prepared flexible lithium battery has a flexible packaging structure, which can be extruded to change its shape, such as being in a flat state, which has wider applicability;
  • the overall lithium battery pack can be put into the plate and other components, and the lithium battery cell can be effectively fixed by tightening the connecting cord, making it less prone to shaking and more stable in structure; at the same time, the flexible structure of the connecting cord is all It can be well assembled into plates with different degrees of curvature; and the connecting wire acts as a reinforcing structure similar to a reinforcing rib to the plate, which can effectively strengthen the strength of the plate and other components.
  • Fig. 1 is a flow chart showing the preparation method of the flexible lithium battery pack in the first embodiment
  • Fig. 2 shows the structural appearance schematic diagram of step A1 in the first embodiment
  • Fig. 3 shows the top view of the flexible covering film folded in half in the first embodiment
  • FIG. 4 is a schematic diagram of the appearance of a flexible lithium battery cell in Example 1;
  • Fig. 5 shows the sectional view of line A-A in Fig. 4;
  • Figure 6 shows a cross-sectional view along line B-B in Figure 4.
  • FIG. 7 is a schematic structural diagram of a lithium battery pack in Embodiment 1;
  • FIG. 8 is a schematic diagram of the operation of the lithium battery pack in the first embodiment
  • FIG. 9 is a schematic structural diagram of the lithium battery pack in the second embodiment.
  • a method for preparing a flexible lithium battery pack includes the following steps:
  • a central tube 20 is provided, and the central tube 20 is inserted into the cell 30;
  • the structure of the battery core 30 is the existing structure, that is, the core tube 20 is inserted into the battery core 30 by rolling it into a cylindrical structure by means of the prior art.
  • A2 provide a flexible covering film, and cover the outer surface of the battery cell with the flexible covering film;
  • the flexible covering film is a film structure.
  • the flexible covering film is folded in half to cover the battery cell 30.
  • the flexible covering film after being folded in half
  • the cladding film 10 has lateral openings 102, an upper opening 101 and a lower opening (not shown).
  • the flexible covering film 10 adopts the aluminum-plastic film commonly used in the prior art, and the technology is mature; of course, it is not limited to this in other embodiments.
  • A3 seal the lateral opening 102 , the upper opening 101 and the lower opening of the flexible covering film 10 to form a lithium battery cell 100 as shown in FIGS. 4 , 5 and 6 (ie, a flexible lithium battery cell ); wherein, the central hole 21 of the central tube 20 is exposed when the upper opening and the lower opening of the flexible covering film 10 are sealed;
  • A4 providing a connecting wire 40, and passing the connecting wire 40 through the central tube 20 of the plurality of lithium battery cells 100 to form a lithium battery pack 200.
  • connection cord 40 is a single independent cord, and the connection cord 40 is sequentially passed through the central tubes 20 of the five lithium battery cells 100 to form a linear lithium battery pack 200 .
  • the flexible lithium battery cell prepared by this method has a soft packaging structure, which can be squeezed to change its shape, as shown in the figure of this embodiment, the extrusion is in a flat state; A plurality of lithium battery cells 100 are pre-fixed and assembled to facilitate subsequent packaging; the lithium battery pack 200 is connected by connecting wires 40, which has good overall flexibility and can be arranged in different shapes for assembly, such as linear, "U” Type or “L” type, etc.; good applicability.
  • the preparation method has the advantages of simple process, easy realization and good preparation efficiency.
  • the electrode lead-out operation of the battery cell is in the prior art.
  • the lead-out terminal is directly set on the aluminum-plastic film, and the positive and negative electrodes of the battery cell are connected to the lead-out end of the aluminum-plastic film when wrapping the battery cell. etc., which are already mastered by those skilled in the art, and will not be described in detail here.
  • step A5 is also included, in which a plurality of lithium battery cells 100 of the same lithium battery pack 200 are electrically connected (eg, connected in series and in parallel) to form a power supply assembly, which saves the need for subsequent specific use and assembly.
  • the cumbersome operation of electrical connection is performed again, and the operation is more convenient; and the pre-fixed connection through the connecting wire 40 makes the structure of the electrical connection in advance more stable.
  • electrical connection and the like may also be performed during specific application and installation.
  • the materials of the central tube 20 and the connecting wire 40 are both thermally conductive materials, and the connecting wire 40 and the central tube 20 form a thermal conductivity. touch.
  • one of the heat dissipation paths of the heat released by the lithium battery can be conducted to the aluminum-plastic film for heat dissipation, and the other heat dissipation path is conducted to the central pipe 20, and then conducted from the central pipe 20 to the connecting wire 40.
  • the heat dissipation by connecting the cord 40 greatly improves the heat dissipation function of the lithium battery.
  • the central tube 20 also adopts a flexible tube body structure, such as a heat-conducting hose. Under the condition of ensuring good heat-conducting effect, the central tube 20 can also be squeezed and deformed (not squeezed in the drawings of this embodiment). deformation), the overall flexibility effect is better.
  • the central tube 20 may also adopt a rigid structure, such as a metal tube.
  • the connecting wire rope 40 adopts a metal wire rope, such as a steel wire rope, the steel wire rope has good hardness and good heat conduction and heat dissipation effects.
  • a metal wire rope such as a steel wire rope
  • the steel wire rope has good hardness and good heat conduction and heat dissipation effects.
  • it is not limited to this in other embodiments.
  • the lithium battery pack 200 is applied into the plate, that is, the plate body 300 A plurality of accommodating cavities (not shown) are formed therein, and the lithium battery cells 100 of the lithium battery pack 200 are sequentially placed in the plurality of accommodating cavities of the plate body 300, and the ends of the connecting wires 40 are fixed on the plate body 300.
  • the outer end of the plate body 300 Specifically, as shown in FIG. 8 , 10 lithium battery packs 200 are arranged side by side in a plate body 300 , that is, the plate body 300 accommodates 50 lithium battery cells 100 .
  • This arrangement has the following advantages: 1. It can effectively save space, that is, save the space for additional arrangement of lithium batteries; 2. After the end of the connecting cord 40 is fixed, it can be tightened to further fix the lithium battery cell 100, the lithium battery The battery cell 100 is not easy to shake, the structure is more stable, and the lithium battery cell 100 does not need to be fixed by means of glue injection, which is convenient for disassembly and maintenance of the lithium battery; 3. The battery can be well connected by operating the connecting cord 40 It is easy to operate for disassembly and maintenance; 4. The flexible structure of the connecting wire rope 40 can be well assembled into plates with different degrees of curvature, and has strong applicability; 5. The connecting wire rope 40 can strengthen the plate like a rib The structure can effectively strengthen the strength of the board. The above-mentioned plate structure can be well applied to a car body or a ship hull.
  • the application of the lithium battery pack 200 is not limited to this.
  • the preparation method of the flexible lithium battery pack provided in this embodiment is substantially the same as the preparation method of the flexible lithium battery pack provided in the first embodiment, the difference is that in step A4, the number of the connecting wires 40 There are multiple, multiple connecting cords 40 to form a mesh structure, and the connecting cords at each interweaving point are fixed by passing through the central tube 20 of the lithium battery cell 100 to form a mesh as shown in FIG. 9 .
  • the meshed lithium battery pack 400 has the same technical effect as the linear lithium battery pack 200 in the first embodiment. Compared with the linear lithium battery pack 200, the 400 has a better reinforcing rib effect.
  • the preparation method of the flexible lithium battery pack provided in this embodiment is substantially the same as the preparation method of the flexible lithium battery pack provided in the first or second embodiment, the difference is that in step A1, the central tube 20 is set There are two (or more than two), and the two central tubes 20 are inserted into the battery core 30; after step A3 is completed, a lithium battery cell with two through holes (ie, the central holes 21 of the two central tubes 20) is formed. body; in step A4, a connecting wire 40 can be passed through the two central tubes 20 to form a linear or mesh-shaped lithium battery pack.
  • the combination when the combination is a linear lithium battery pack, two independent connecting wires 40 are arranged side by side and are respectively penetrated in the two through holes of the lithium battery cell 100. As shown in FIG. 7, the single connecting wire 40 becomes side by side. the second root.
  • the two connecting wires 40 of each interleaving point When assembled into a mesh-shaped lithium battery pack, the two connecting wires 40 of each interleaving point are respectively passed through the two through holes of each lithium battery cell 100, that is, the two connecting wires 40 of each interleaving point as shown in FIG. 9 .
  • the structure in which one connecting wire 40 is simultaneously threaded into one central tube 20 becomes that two connecting wires 40 at each interweaving point are respectively threaded into the two central tubes 20 .

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  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
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Abstract

本发明提供一种柔性锂电池组的制备方法，包括如下步骤：A1，提供中心管，将该中心管插入电芯内；A2，提供一柔性包覆膜，将柔性包覆膜包覆电芯的外表面；A3，将柔性包覆膜的侧向开口、上开口和下开口进行封口，形成一锂电池单体；其中，对柔性包覆膜的上开口和下开口进行封口时裸露出中心管的中心孔；A4，提供连接线绳，将连接线绳穿过多个锂电池单体的中心管，形成锂电池组。工艺步骤简单、容易实现；所制备的柔性锂电池组运用好。

Description

一种柔性锂电池组的制备方法 技术领域
本发明涉及锂电池领域，具体涉及一种柔性锂电池组的制备方法。
背景技术
锂电池(Lithium battery)是指电化学体系中含有锂(包括金属锂、锂合金和锂离子、锂聚合物)的电池。锂电池大致可分为两类：锂金属电池和锂离子电池。锂金属电池通常是不可充电的，且内含金属态的锂。锂离子电池不含有金属态的锂，并且是可以充电的。而现有中的锂电池通常是指可以充电的锂离子电池。
现有技术中，所用到的锂电池组件通常是将多个锂电池单体进行串并联组合，以达到符合的输出电源，所组合的多个锂电池单体，均是将一个个锂电池单体进行单独拼接装配的，具有封装难度较大、散热性较差等缺陷。需要进行改变。
发明内容
为此，本发明一种柔性锂电池组的制备方法，通过该方法所制备出的锂电池组能够有效的改善上述问题。
为实现上述目的，本发明提供的技术方案如下：
一种柔性锂电池组的制备方法，包括如下步骤：
A1，提供中心管，将该中心管插入电芯内；
A2，提供一柔性包覆膜，将柔性包覆膜包覆电芯的外表面；
A3，将柔性包覆膜的侧向开口、上开口和下开口进行封口，形成一锂电池 单体；其中，对柔性包覆膜的上开口和下开口进行封口时裸露出中心管的中心孔；
A4，提供连接线绳，将连接线绳穿过多个锂电池单体的中心管，形成锂电池组。
进一步的，步骤A4中，所述连接线绳为独立的绳索，所述连接线绳依次穿过多个锂电池单体的中心管而形成线状的锂电池组。
进一步的，步骤A4中，所述连接线绳的数量为多根，多根连接线绳组成网状结构，且每个交织点的连接线绳由穿过锂电池单体的中心管而形成固定，进而形成网状的锂电池组。
进一步的，还包括步骤A5，对同一锂电池组的多个锂电池单体进行电性连接。
进一步的，所述中心管和连接线绳的材质均为导热性材质，所述连接线绳与中心管形成热接触。
进一步的，所述连接线绳为金属线绳，具体为钢丝线绳。
进一步的，所述中心管为金属管或导热软管。
进一步的，所述柔性包覆膜为铝塑膜。
进一步的，步骤A1中，插入电芯内的中心管的数量为一个或多个。
通过本发明提供的技术方案，具有如下有益效果：
本制备方法工艺简单，容易实现。通过该方法制备出的锂电池组，具有如下优势：
1.中心管和连接线绳可采用导热材质，锂电池单体发出的热量能够经中心管传导至连接线绳，再通过连接线绳散出，增加一散热通道，导热、散热效果 更好；
2.可对多个锂电池单体进行预固定装配，方便后续封装；
3.锂电池组采用连接线绳进行穿接，整体柔性好，可排布成不同形状进行装配，适用性好；
4.组合方式多样，可组合成线状或者网状结构，以适应不同的封装方式；
5.所制备出的柔性锂电池单体为软包装结构，能够对其进行挤压等操作而改变外形，如挤压呈扁平状态，适用性更广；
6.可将整体锂电池组放入板材等部件内，通过拉紧连接线绳的方式能够有效固定住锂电池单体，使其不易晃动，结构更稳定；同时，连接线绳的柔性结构均能够很好的装配至不同弯曲度的板材内；且连接线绳对板材起到类似加强筋的加强结构，能够有效的加强板材等部件的强度。
附图说明
图1所示为实施例一中柔性锂电池组的制备方法的流程框图；
图2所示为实施例一中步骤A1的结构外观示意图；
图3所示为实施例一中柔性包覆膜对半折叠后的俯视图；
图4所示为实施例一中柔性锂电池单体的外观示意图；
图5所示为图4中A-A线的剖视图；
图6所示为图4中B-B线的剖视图；
图7所示为实施例一中锂电池组的结构示意图；
图8所示为实施例一中锂电池组的运用示意图；
图9所示为实施例二中锂电池组的结构示意图。
具体实施方式
为进一步说明各实施例，本发明提供有附图。这些附图为本发明揭露内容的一部分，其主要用以说明实施例，并可配合说明书的相关描述来解释实施例的运作原理。配合参考这些内容，本领域普通技术人员应能理解其他可能的实施方式以及本发明的优点。图中的组件并未按比例绘制，而类似的组件符号通常用来表示类似的组件。
现结合附图和具体实施方式对本发明进一步说明。
参照图1所示，本实施例提供的一种柔性锂电池组的制备方法，包括如下步骤：
A1，如图2所示，提供一中心管20，将该中心管20插入电芯30内；
具体的，电芯30的结构为现有结构，即通过现有技术手段卷成筒状结构，然后将中心管20插入电芯30内。
A2，提供一柔性包覆膜，将柔性包覆膜包覆电芯的外表面；
具体的，柔性包覆膜是一张膜的结构，包覆时，将柔性包覆膜对半折叠，将电芯30包覆住，此时，参照图3所示，对半折叠后的柔性包覆膜10具有侧向开口102、上开口101和下开口(未示出)。
再具体的，柔性包覆膜10采用现有技术中常用的铝塑膜，技术成熟；当然的，在其它实施例中不局限于此。
A3，将柔性包覆膜10的侧向开口102、上开口101和下开口进行封口，形成一如图4、图5以及图6所示的锂电池单体100(即为柔性锂电池单体)；其中，对柔性包覆膜10的上开口和下开口进行封口时裸露出中心管20的中心孔 21；
A4，提供连接线绳40，将连接线绳40穿过多个锂电池单体100的中心管20，形成锂电池组200。
具体的如图7所示，所述连接线绳40为单根独立的绳索，连接线绳40依次穿设于五个锂电池单体100的中心管20内而形成线状的锂电池组200。
通过该方法制备所制备出的柔性锂电池单体为软包装结构，能够对其进行挤压等操作而改变外形，如本实施例附图中挤压呈扁平状态；同时，通过连接线绳40可对多个锂电池单体100进行预固定装配，方便后续封装；锂电池组200采用连接线绳40进行穿接，整体柔性好，可排布成不同形状进行装配，如直线型、“U”型或“L”型等等；适用性好。且该制备方法工艺简单，容易实现，制备效率好。
具体的，对于电芯的电极引出操作是现有技术，如直接在铝塑膜上设置引出端，进行包覆电芯时，将电芯的正负极与铝塑膜的引出端相连即可等等，是本领域的技术人员早已掌握的，在此不再详述。
进一步的，本实施例中，还包括步骤A5，对同一锂电池组200的多个锂电池单体100进行电性连接(如串并联连接)，形成一个电源组件，省去后续具体运用装配时再进行电性连接的繁琐操作，操作更为简便；且因通过连接线绳40的预固定连接，使得该预先进行电性连接的结构更为稳定。当然的，在其它实施例中，也可以在具体运用安装时再进行电性连接等。
更为优选的，为了更好的对锂电池进行散热，本实施例中，所述中心管20和连接线绳40的材质均为导热性材质，所述连接线绳40与中心管20形成热接触。如此，锂电池工作时放出的热量，可其中一条散热路径为通过传导至铝塑 膜进行散热，另一条散热路径为通过传导至中心管20，再从中心管20传导至连接线绳40上，通过连接线绳40进行散热，极大的提高了锂电池的散热功能。当然的，在其它实施例中不局限于此。
再具体的，中心管20也采用柔性的管体结构，如导热软管，在保证好的导热效果的情况下，中心管20也能够被挤压形变(本实施例附图中未被挤压形变)，整体柔性效果更好。当然的，在其它实施例中，中心管20也可以采用硬质结构，如金属管等。
再具体的，所述连接线绳40采用金属线绳，如钢丝绳，钢丝绳硬度好，导热、散热效果好。当然的，在其它实施例中不局限于此。
进一步的，本实施例中，进一步的，本实施例中，参照图8所示，作为该方法制备的柔性锂电池组的一种运用，将锂电池组200运用至板材内，即板材本体300内形成有多个容置腔(未示出)，所述锂电池组200的锂电池单体100依次置于板材本体300的多个容置腔内，其连接线绳40的端部固定于板材本体300的外端部。具体如图8所示，一个板材本体300内并排布置有10个锂电池组200，即该板材本体300内容纳有50个锂电池单体100。
如此设置，具有如下优势：1.能够有效的节省空间，即省去额外布置锂电池的空间；2.连接线绳40的端部固定后能够进行拉紧，进一步固定锂电池单体100，锂电池单体100不易晃动，结构更稳定，且不用通过注胶等手段固定住锂电池单体100，便于锂电池的拆装维护；3.通过对连接线绳40的操作即可很好对电池进行拆装维护，操作简便；4.连接线绳40的柔性结构均能够很好的装配至不同弯曲度的板材内，适用性强；5.连接线绳40对板材起到类似加强筋的加强结构，能够有效的加强板材的强度。上述板材结构能够很好的运用于车体或船体等。
当然的，在其它实施例中，锂电池组200的运用不局限于此。
实施例二
本实施例提供的一种柔性锂电池组的制备方法，与实施例一中所提供的柔性锂电池组的制备方法大致相同，不同之处在于，步骤A4中，所述连接线绳40的数量为多根，多根连接线绳40组成网状结构，且每个交织点的连接线绳由穿过锂电池单体100的中心管20而形成固定，进而形成如图9所示的网状的锂电池组400。该网状的锂电池组400与实施例一中线状的锂电池组200具有相同的技术效果，同时，在一些运用领域，如像实施例一中封装在板材内时，网状的锂电池组400相较于线状的锂电池组200，其起到的加强筋作用更为优异。
实施例三
本实施例提供的一种柔性锂电池组的制备方法，与实施例一或实施例二中所提供的柔性锂电池组的制备方法大致相同，不同之处在于，步骤A1中，中心管20设有二个(也可以大于二个)，二个中心管20均插入电芯30内；完成步骤A3后，形成具有二个通孔(即二个中心管20的中心孔21)的锂电池单体；步骤A4中，可在二个中心管20内穿设连接线绳40以形成线状或网状的锂电池组。
即组合呈线状锂电池组时，二根独立的连接线绳40并排设置分别穿设于锂电池单体100的二个通孔内，如附图7中单根连接线绳40变成并排的二根。组合成网状的锂电池组时，每个交织点的二根连接线绳40分别穿设于每个锂电池单体100的二个通孔内，即如图9中每个交织点的二根连接线绳40同时穿入一个中心管20的结构变成每个交织点的二根连接线绳40分别穿设于二个中心管20内。
尽管结合优选实施方案具体展示和介绍了本发明，但所属领域的技术人员应该明白，在不脱离所附权利要求书所限定的本发明的精神和范围内，在形式上和细节上可以对本发明做出各种变化，均为本发明的保护范围。

Claims (9)

  1. 一种柔性锂电池组的制备方法，其特征在于，包括如下步骤：
    A1，提供中心管，将该中心管插入电芯内；
    A2，提供一柔性包覆膜，将柔性包覆膜包覆电芯的外表面；
    A3，将柔性包覆膜的侧向开口、上开口和下开口进行封口，形成一锂电池单体；其中，对柔性包覆膜的上开口和下开口进行封口时裸露出中心管的中心孔；
    A4，提供连接线绳，将连接线绳穿过多个锂电池单体的中心管，形成锂电池组。
  2. 根据权利要求1所述的柔性锂电池组的制备方法，其特征在于：步骤A4中，所述连接线绳为独立的绳索，所述连接线绳依次穿过多个锂电池单体的中心管而形成线状的锂电池组。
  3. 根据权利要求1所述的柔性锂电池组的制备方法，其特征在于：步骤A4中，所述连接线绳的数量为多根，多根连接线绳组成网状结构，且每个交织点的连接线绳由穿过锂电池单体的中心管而形成固定，进而形成网状的锂电池组。
  4. 根据权利要求1所述的柔性锂电池组的制备方法，其特征在于：还包括步骤A5，对同一锂电池组的多个锂电池单体进行电性连接。
  5. 根据权利要求1所述的柔性锂电池组的制备方法，其特征在于：所述中心管和连接线绳的材质均为导热性材质，所述连接线绳与中心管形成热接触。
  6. 根据权利要求5所述的柔性锂电池组的制备方法，其特征在于：所述连接线绳为金属线绳。
  7. 根据权利要求5所述的柔性锂电池组的制备方法，其特征在于：所述中心管为金属管或导热软管。
  8. 根据权利要求1所述的柔性锂电池组的制备方法，其特征在于：所述柔性包覆膜为铝塑膜。
  9. 根据权利要求1所述的柔性锂电池组的制备方法，其特征在于：步骤A1中，插入电芯内的中心管的数量为一个或多个。
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