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CN112164822A - Preparation method of flexible lithium battery pack - Google Patents

Preparation method of flexible lithium battery pack Download PDF

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Publication number
CN112164822A
CN112164822A CN202011221247.8A CN202011221247A CN112164822A CN 112164822 A CN112164822 A CN 112164822A CN 202011221247 A CN202011221247 A CN 202011221247A CN 112164822 A CN112164822 A CN 112164822A
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CN
China
Prior art keywords
lithium battery
flexible
wire rope
battery pack
connecting wire
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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.)
Granted
Application number
CN202011221247.8A
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Chinese (zh)
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CN112164822B (en
Inventor
吕永安
阮克荣
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Xiamen Zl Diamond Technology Co ltd
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Xiamen Zl Diamond Technology Co ltd
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Priority to CN202011221247.8A priority Critical patent/CN112164822B/en
Publication of CN112164822A publication Critical patent/CN112164822A/en
Priority to PCT/CN2021/127823 priority patent/WO2022095812A1/en
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Publication of CN112164822B publication Critical patent/CN112164822B/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/058Construction or manufacture
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/61Types of temperature control
    • H01M10/613Cooling or keeping cold
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/64Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647Prismatic or flat cells, e.g. pouch cells
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/60Heating or cooling; Temperature control
    • H01M10/65Means for temperature control structurally associated with the cells
    • H01M10/653Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

The invention provides a preparation method of a flexible lithium battery pack, which comprises the following steps: a1, providing a central tube, and inserting the central tube into the electric core; a2, providing a flexible coating film, and coating the outer surface of the battery cell with the flexible coating film; a3, sealing the lateral opening, the upper opening and the lower opening of the flexible coating film to form a lithium battery monomer; the central hole of the central tube is exposed when the upper opening and the lower opening of the flexible coating film are sealed; and A4, providing a connecting wire rope, and penetrating the connecting wire rope through the central tubes of the plurality of lithium battery cells to form the lithium battery pack. The process steps are simple and easy to realize; the prepared flexible lithium battery pack is good in application.

Description

Preparation method of flexible lithium battery pack
Technical Field
The invention relates to the field of lithium batteries, in particular to a preparation method of a flexible lithium battery pack.
Background
Lithium batteries (Lithium batteries) refer to batteries in which the electrochemical system contains Lithium (including metallic Lithium, Lithium alloys and Lithium ions, Lithium polymers). Lithium batteries can be broadly classified into two types: 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 battery is generally referred to as a rechargeable lithium ion battery.
Among the prior art, the lithium battery pack who uses carries out the combination of connecting in series and in parallel with a plurality of lithium battery monomer usually to reach the output power who accords with, a plurality of lithium battery monomer that make up all splice the assembly alone with a plurality of lithium battery monomer, have the encapsulation degree of difficulty great, the poor scheduling defect of thermal diffusivity. Changes need to be made.
Disclosure of Invention
Therefore, the preparation method of the flexible lithium battery pack can effectively improve the problems.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a preparation method of a flexible lithium battery pack comprises the following steps:
a1, providing a central tube, and inserting the central tube into the electric core;
a2, providing a flexible coating film, and coating the outer surface of the battery cell with the flexible coating film;
a3, sealing the lateral opening, the upper opening and the lower opening of the flexible coating film to form a lithium battery monomer; the central hole of the central tube is exposed when the upper opening and the lower opening of the flexible coating film are sealed;
and A4, providing a connecting wire rope, and penetrating the connecting wire rope through the central tubes of the plurality of lithium battery cells to form the lithium battery pack.
Further, in step a4, the connection cord is an independent cord, and the connection cord sequentially passes through the central tubes of the plurality of lithium battery cells to form a linear lithium battery pack.
Further, in the step a4, the number of the connecting ropes is multiple, the multiple connecting ropes form a net structure, and the connecting ropes at each interweaving point are fixed by a central tube penetrating through the lithium battery cells, so as to form a net lithium battery pack.
Further, the method includes a step a5 of electrically connecting a plurality of lithium battery cells of the same lithium battery pack.
Furthermore, the central tube and the connecting wire rope are both made of heat-conducting materials, and the connecting wire rope and the central tube form thermal contact.
Further, the connecting wire rope is a metal wire rope, specifically a steel wire rope.
Further, the central tube is a metal tube or a heat conducting hose.
Further, the flexible coating film is an aluminum plastic film.
Further, in step a1, the number of the central tubes inserted into the core is one or more.
Through the technical scheme provided by the invention, the method has the following beneficial effects:
the preparation method has simple process and is easy to realize. The lithium battery pack prepared by the method has the following advantages:
1. the central tube and the connecting wire rope can be made of heat-conducting materials, heat generated by the lithium battery monomer can be conducted to the connecting wire rope through the central tube and then dissipated out through the connecting wire rope, a heat dissipation channel is added, and heat conduction and heat dissipation effects are better;
2. the multiple lithium battery single bodies can be pre-fixed and assembled, so that subsequent packaging is facilitated;
3. the lithium battery pack is connected in a penetrating manner by the connecting wire rope, so that the whole flexibility is good, the lithium battery pack can be arranged into different shapes for assembly, and the applicability is good;
4. the packaging structure has various combination modes and can be combined into a linear or net-shaped structure so as to adapt to different packaging modes;
5. the prepared flexible lithium battery monomer is of a flexible package structure, can be extruded and the like to change the shape, and has wider applicability if the extrusion is in a flat state;
6. the whole lithium battery pack can be placed into components such as plates, and the lithium battery monomer can be effectively fixed in a mode of tightly pulling the connecting wire rope, so that the lithium battery pack is not easy to shake and has a more stable structure; meanwhile, the flexible structures of the connecting wire ropes can be well assembled into the plates with different curvatures; and the connecting wire rope plays a reinforcing structure similar to a reinforcing rib for the plate, so that the strength of the plate and other parts can be effectively enhanced.
Drawings
Fig. 1 is a block flow diagram illustrating a method of manufacturing a flexible lithium battery pack according to a first embodiment;
FIG. 2 is a schematic structural appearance diagram illustrating step A1 according to an embodiment;
FIG. 3 is a top view of the flexible cover film folded in half according to the first embodiment;
fig. 4 is a schematic external view of a flexible lithium battery cell according to a first embodiment;
FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;
FIG. 6 is a cross-sectional view taken along line B-B of FIG. 4;
fig. 7 is a schematic structural diagram of a lithium battery pack according to an embodiment;
FIG. 8 is a schematic diagram illustrating an application of a lithium battery pack according to an embodiment;
fig. 9 is a schematic structural diagram of a lithium battery pack according to a second embodiment.
Detailed Description
To further illustrate the various embodiments, the invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The invention will now be further described with reference to the accompanying drawings and detailed description.
Referring to fig. 1, a method for manufacturing a flexible lithium battery pack according to this embodiment includes the following steps:
a1, as shown in fig. 2, providing a central tube 20, and inserting the central tube 20 into the battery core 30;
specifically, the structure of the battery cell 30 is an existing structure, that is, the battery cell 30 is rolled into a cylindrical structure by an existing technical means, and then the central tube 20 is inserted into the battery cell 30.
A2, providing a flexible coating film, and coating the outer surface of the battery cell with the flexible coating film;
specifically, the flexible cover film is a structure of a single film, and when covering, the flexible cover film is folded in half to cover the battery cell 30, and at this time, referring to fig. 3, the flexible cover film 10 after folding in half has a lateral opening 102, an upper opening 101, and a lower opening (not shown).
Specifically, the flexible coating film 10 is a common aluminum-plastic film in the prior art, and the technology is mature; of course, in other embodiments, this is not limiting.
A3, sealing the lateral opening 102, the upper opening 101 and the lower opening of the flexible coating film 10 to form a lithium battery cell 100 (i.e. a flexible lithium battery cell) as shown in fig. 4, 5 and 6; wherein, when the upper opening and the lower opening of the flexible coating film 10 are sealed, the central hole 21 of the central tube 20 is exposed;
a4, providing a connecting wire rope 40, and penetrating the connecting wire rope 40 through the central pipes 20 of the plurality of lithium battery cells 100 to form the lithium battery pack 200.
Specifically, as shown in fig. 7, the connection cord 40 is a single independent cord, and the connection cord 40 is sequentially inserted into the central tubes 20 of the five lithium battery cells 100 to form a linear lithium battery pack 200.
The flexible lithium battery monomer prepared by the method is of a flexible package structure, and can be extruded and the like to change the shape, such as the extrusion in the attached drawing of the embodiment is in a flat state; meanwhile, the plurality of lithium battery cells 100 can be pre-fixed and assembled through the connecting wire ropes 40, so that subsequent packaging is facilitated; the lithium battery pack 200 is connected by the connecting wire rope 40 in a penetrating manner, has good overall flexibility, and can be arranged into different shapes for assembly, such as a linear type, a U-shaped or an L-shaped structure and the like; the applicability is good. The preparation method is simple in process, easy to implement and good in preparation efficiency.
Specifically, the operation of leading out the electrode of the electrical core is the prior art, and for example, when the electrical core is directly coated by providing a leading-out terminal on the aluminum-plastic film, the positive electrode and the negative electrode of the electrical core are connected with the leading-out terminal of the aluminum-plastic film, and the like, which has been known by those skilled in the art, detailed description is omitted here.
Further, in this embodiment, a step a5 is further included, in which a plurality of lithium battery cells 100 of the same lithium battery pack 200 are electrically connected (e.g., connected in series and parallel) to form a power supply assembly, so that the complicated operation of electrical connection during subsequent specific application and assembly is omitted, and the operation is simpler and more convenient; and the pre-fixed connection through the connection wire rope 40 makes the structure of the pre-electrical connection more stable. Of course, in other embodiments, electrical connection and the like may be performed during installation for specific applications.
More preferably, in order to better dissipate heat of the lithium battery, in this embodiment, the central tube 20 and the connection cord 40 are both made of a heat conductive material, and the connection cord 40 is in thermal contact with the central tube 20. So, the heat that the lithium cell during operation emitted can one of them heat dissipation route be dispels the heat through conducting to the plastic-aluminum membrane, and another heat dissipation route is through conducting to center tube 20, again from center tube 20 conduction to connecting wire rope 40 on, dispel the heat through connecting wire rope 40, very big improvement the heat dissipation function of lithium cell. Of course, in other embodiments, this is not limiting.
More specifically, the central tube 20 also adopts flexible body structure, like the heat conduction hose, under the condition of guaranteeing good heat conduction effect, the central tube 20 also can be extruded and deformed (not extruded and deformed in this embodiment drawing), and whole flexible effect is better. Of course, in other embodiments, the base pipe 20 may be a rigid structure, such as a metal pipe.
More specifically, the connecting wire rope 40 is a metal wire rope, such as a steel wire rope, which has good hardness, good heat conduction and heat dissipation effects. Of course, in other embodiments, this is not limiting.
Further, in this embodiment, referring to fig. 8, in this embodiment, as an application of the flexible lithium battery pack prepared by the method, the lithium battery pack 200 is applied into a sheet material, that is, a plurality of accommodating cavities (not shown) are formed in the sheet material body 300, the lithium battery cells 100 of the lithium battery pack 200 are sequentially placed in the plurality of accommodating cavities of the sheet material body 300, and ends of the connecting wire ropes 40 of the lithium battery pack are fixed to outer ends of the sheet material body 300. As shown in fig. 8, 10 lithium battery packs 200 are arranged side by side in one plate 300, that is, 50 lithium battery cells 100 are accommodated in the plate 300.
So set up, have following advantage: 1. the space can be effectively saved, namely, the space for additionally arranging the lithium battery is saved; 2. the end of the connecting wire rope 40 can be tensioned after being fixed, so that the lithium battery monomer 100 is further fixed, the lithium battery monomer 100 is not easy to shake, the structure is more stable, the lithium battery monomer 100 is not fixed by means of glue injection and the like, and the lithium battery is convenient to disassemble, assemble and maintain; 3. the battery can be well disassembled and maintained by operating the connecting wire rope 40, and the operation is simple and convenient; 4. the flexible structures of the connecting wire ropes 40 can be well assembled into the plates with different curvatures, so that the applicability is strong; 5. the connecting wire rope 40 has a reinforcing structure similar to a reinforcing rib for the plate, and can effectively reinforce the strength of the plate. The plate structure can be well applied to vehicle bodies or ship bodies and the like.
Of course, in other embodiments, the use of the lithium battery pack 200 is not limited thereto.
Example two
The method for manufacturing a flexible lithium battery pack according to this embodiment is substantially the same as the method for manufacturing a flexible lithium battery pack according to the first embodiment, except that in step a4, the number of the connecting strings 40 is multiple, the multiple connecting strings 40 form a mesh structure, and the connecting strings at each intersection point are fixed by passing through the central tube 20 of the lithium battery cell 100, so as to form the mesh-shaped lithium battery pack 400 shown in fig. 9. The reticulated lithium battery pack 400 has the same technical effect as the linear lithium battery pack 200 of the first embodiment, and meanwhile, in some application fields, such as the first embodiment, when the reticulated lithium battery pack 400 is packaged in a plate, the reticulated lithium battery pack 400 has more excellent reinforcing rib effect than the linear lithium battery pack 200.
EXAMPLE III
The method for preparing a flexible lithium battery pack provided in this embodiment is substantially the same as the method for preparing a flexible lithium battery pack provided in the first embodiment or the second embodiment, except that in step a1, two (or more) central tubes 20 are provided, and the two central tubes 20 are inserted into the battery core 30; after the step a3 is completed, forming a lithium battery cell having two through holes (i.e. two central holes 21 of the central tube 20); in step a4, wire ropes 40 may be threaded into the two central tubes 20 to form a linear or net-shaped lithium battery pack.
That is, when the linear lithium battery pack is assembled, the two independent connecting wire ropes 40 are arranged side by side and respectively penetrate through the two through holes of the lithium battery cell 100, and as shown in fig. 7, the single connecting wire rope 40 is changed into two parallel connecting wires. When the net-shaped lithium battery pack is assembled, the two connecting wire ropes 40 of each interlacing point are respectively inserted into the two through holes of each lithium battery cell 100, that is, as shown in fig. 9, the structure that the two connecting wire ropes 40 of each interlacing point simultaneously penetrate into one central tube 20 is changed into the structure that the two connecting wire ropes 40 of each interlacing point are respectively inserted into the two central tubes 20.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (9)

1. The preparation method of the flexible lithium battery pack is characterized by comprising the following steps:
a1, providing a central tube, and inserting the central tube into the electric core;
a2, providing a flexible coating film, and coating the outer surface of the battery cell with the flexible coating film;
a3, sealing the lateral opening, the upper opening and the lower opening of the flexible coating film to form a lithium battery monomer; the central hole of the central tube is exposed when the upper opening and the lower opening of the flexible coating film are sealed;
and A4, providing a connecting wire rope, and penetrating the connecting wire rope through the central tubes of the plurality of lithium battery cells to form the lithium battery pack.
2. The method of manufacturing a flexible lithium battery according to claim 1, wherein: in the step a4, the connection wire rope is an independent rope, and the connection wire rope sequentially passes through the central tubes of the plurality of lithium battery cells to form a linear lithium battery pack.
3. The method of manufacturing a flexible lithium battery according to claim 1, wherein: in the step a6, the number of the connecting wire ropes is multiple, the multiple connecting wire ropes form a net structure, and the connecting wire ropes of each interlacing point are fixed by a central tube penetrating through the lithium battery cell, so as to form a net lithium battery pack.
4. The method of manufacturing a flexible lithium battery according to claim 1, wherein: the method further comprises a step A5 of electrically connecting a plurality of lithium battery cells of the same lithium battery pack.
5. The method of manufacturing a flexible lithium battery according to claim 1, wherein: the central tube and the connecting wire rope are both made of heat-conducting materials, and the connecting wire rope and the central tube form thermal contact.
6. The method of manufacturing a flexible lithium battery according to claim 5, wherein: the connecting wire rope is a metal wire rope.
7. The method of manufacturing a flexible lithium battery according to claim 5, wherein: the central tube is a metal tube or a heat-conducting hose.
8. The method of manufacturing a flexible lithium battery according to claim 1, wherein: the flexible coating film is an aluminum plastic film.
9. The method of manufacturing a flexible lithium battery according to claim 1, wherein: in step a1, the number of center tubes inserted into the core is one or more.
CN202011221247.8A 2020-11-05 2020-11-05 Preparation method of flexible lithium battery pack Active CN112164822B (en)

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CN202011221247.8A CN112164822B (en) 2020-11-05 2020-11-05 Preparation method of flexible lithium battery pack
PCT/CN2021/127823 WO2022095812A1 (en) 2020-11-05 2021-11-01 Preparation method for flexible lithium battery pack

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022095810A1 (en) * 2020-11-05 2022-05-12 厦门致力金刚石科技股份有限公司 Single lithium battery, lithium battery pack, and plate structure
WO2022095812A1 (en) * 2020-11-05 2022-05-12 厦门致力金刚石科技股份有限公司 Preparation method for flexible lithium battery pack
WO2022095811A1 (en) * 2020-11-05 2022-05-12 厦门致力金刚石科技股份有限公司 Preparation method for rigid lithium battery pack

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CN112216860B (en) * 2020-11-05 2021-12-07 厦门致力金刚石科技股份有限公司 Preparation method of rigid lithium battery pack
CN112164822B (en) * 2020-11-05 2021-12-07 厦门致力金刚石科技股份有限公司 Preparation method of flexible lithium battery pack
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CN203242712U (en) * 2013-05-14 2013-10-16 东莞新能源科技有限公司 Bending lithium-ion battery
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WO2022095810A1 (en) * 2020-11-05 2022-05-12 厦门致力金刚石科技股份有限公司 Single lithium battery, lithium battery pack, and plate structure
WO2022095812A1 (en) * 2020-11-05 2022-05-12 厦门致力金刚石科技股份有限公司 Preparation method for flexible lithium battery pack
WO2022095811A1 (en) * 2020-11-05 2022-05-12 厦门致力金刚石科技股份有限公司 Preparation method for rigid lithium battery pack

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