WO2021184521A1 - 一种大容量电池及其制作方法 - Google Patents

一种大容量电池及其制作方法 Download PDF

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WO2021184521A1
WO2021184521A1 PCT/CN2020/090917 CN2020090917W WO2021184521A1 WO 2021184521 A1 WO2021184521 A1 WO 2021184521A1 CN 2020090917 W CN2020090917 W CN 2020090917W WO 2021184521 A1 WO2021184521 A1 WO 2021184521A1
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core
negative
positive electrode
positive
negative electrode
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PCT/CN2020/090917
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English (en)
French (fr)
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许祎凡
娄豫皖
孟祎凡
李紫璇
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上海比耐信息科技有限公司
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Priority claimed from CN202010202785.6A external-priority patent/CN111370775A/zh
Priority claimed from CN202020363361.3U external-priority patent/CN211530117U/zh
Application filed by 上海比耐信息科技有限公司 filed Critical 上海比耐信息科技有限公司
Publication of WO2021184521A1 publication Critical patent/WO2021184521A1/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
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • 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

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  • the invention relates to a large-capacity battery and a manufacturing method thereof, and belongs to the technical field of batteries.
  • the patent application number is 201210382758.7 (publication number is CN102881948A), and the patent name is a prismatic lithium-ion battery and its processing method.
  • the gap and tightness of the core and pole pieces are uniform, and the production efficiency is high.
  • the core auxiliary module can support and protect the core, which improves the mechanical strength and safety of the square battery.
  • the capacity of the battery can be increased by increasing the number of cores.
  • the patent application number is 201621215288.5 (the announcement number is CN206388790U), and the patent name is a utility model of a square power battery.
  • Patent application number 201720727978.7 publication number CN206976440U
  • the patent name is a battery pack, its structure includes a plurality of wound cells and a plastic bracket for accommodating the plurality of wound cells. These wound cells are connected in parallel. Form a large-capacity battery.
  • the brackets or auxiliary modules of the fixed core used in the above three patents are made of materials with poor insulation and thermal conductivity, and the heat dissipation performance is even worse than that of ordinary large-capacity batteries, which cannot achieve the purpose of improving heat dissipation, rate performance and life. .
  • the present invention proposes a method for manufacturing a large-capacity battery.
  • the metal cylinder is connected by welding, bonding or integral molding to form a whole, and then it is connected with the positive electrode of the non-polar lug winding core (it can also be the negative electrode)
  • the base body, the positive electrode (or negative electrode) busbar, and the metal casing are welded to form a whole, which greatly improves the heat dissipation performance and rate performance of each non-polar lug cylindrical core; through the metal casing and the metal cylinder, the metal cylinder and the positive electrode
  • the large-capacity battery designed in the present invention includes a metal casing, a non-polar lug cylindrical winding core, a positive electrode cover, a negative electrode cover, a positive electrode busbar, a negative electrode busbar, an insulating heat conducting sheet and a battery support;
  • the shape of the metal shell is not limited to cylindrical or square, and can be designed to any desired shape;
  • the non-polar lug cylindrical winding core is composed of a winding core and a metal cylinder wrapping the winding core; one end of the winding core is the positive electrode substrate (such as aluminum foil), and the other end is the negative electrode substrate (such as copper foil);
  • a number of non-polar lug cylindrical winding cores are arranged in the metal shell.
  • the metal cylinders are connected by welding, bonding or integral molding to form a whole.
  • the non-polar lug cylindrical winding core positive electrode base and positive busbar are welded, and the negative electrode base and the negative electrode are welded.
  • the busbars are welded, so as to form a core group;
  • the negative terminal is filled with an insulating thermal conductive sheet between the negative bus bar and the negative cover plate for heat conduction;
  • the material of the insulating and thermally conductive sheet has insulation properties and high thermal conductivity, and can be any kind of silicone sheet, silicone rubber, rubber, etc., which has this characteristic, and is not limited to the above-mentioned types.
  • a number of round holes are opened on the negative bus bar and the insulating heat-conducting sheet, which is convenient for liquid injection;
  • the negative terminal uses a battery holder to fix the cylindrical winding core, and the battery holder is clamped between the cylindrical winding cores of the endless lugs; the upper position in the axial direction is limited by an insulating heat conductive sheet and the negative cover plate, and the lower position in the axial direction is limited by a metal cylinder .
  • the positive electrode base body, the positive electrode bus bar and the metal cylinder of the positive end of the non-polar lug cylindrical winding core are welded;
  • a negative pole and an explosion-proof valve are arranged on the negative cover plate.
  • the position of the explosion-proof valve is the injection port. After the injection is completed, the explosion-proof valve is welded at the position of the injection port.
  • the non-polar lug cylindrical coil core inside the large-capacity battery of the present invention is composed of positive and negative electrodes of the same system, such as lithium iron phosphate-graphite core, lithium manganate-graphite core, nickel cobalt manganate-graphite core, cobalt acid Lithium-graphite core, lithium cobaltate-lithium titanate core, lithium manganate-lithium titanate core, supercapacitor core, metal hydride-nickel core, cadmium-nickel core, zinc-nickel core Any one of other chemical power sources, and is not limited to the above system.
  • the non-polar lug cylindrical winding core inside the large-capacity battery of the present invention can be combined with winding cores of different material systems, such as lithium manganate-graphite winding core and nickel cobalt manganese lithium-graphite winding core combination, power type super capacitor winding
  • the core is combined with an energy-type lithium-ion winding core of the same type of cathode material, etc.
  • Two types of roll cores with different characteristics are combined in parallel to form a large-capacity battery, which improves performance while reducing costs.
  • lithium-ion batteries use aluminum as the material of the metal casing and metal cylinder
  • the cathode substrate of the non-pole cylindrical winding core is aluminum foil.
  • the negative electrode substrate is copper foil; for example, supercapacitors and batteries using lithium titanate as the negative electrode material use aluminum as the material of the metal shell and metal cylinder, and the positive and negative electrode substrates of the non-pole cylindrical winding core are aluminum foil; also Use stainless steel or other materials as the material of the metal shell and metal cylinder.
  • Opening formation can also be closed after welding explosion-proof valve
  • the positive electrode base body, the positive electrode bus bar and the metal cylinder of the non-polar lug cylindrical winding core are welded, so that the bus bar and the metal cylinder of the non-polar lug cylindrical winding core are integrated at the welding point, which reduces the connection resistance and improves
  • the heat transfer rate of the single battery further improves the heat dissipation efficiency of the large-capacity battery.
  • the non-polar lug cylindrical winding core is laser welded with the positive electrode base and the negative electrode base through the positive and negative busbars, which increases the area of the solder joints, shortens the welding path, and greatly improves the power output capacity.
  • This large-capacity battery can add electrolyte to the gap between the non-polar lug core and the shell.
  • the injection efficiency of the production process is high, and the cycle life can be improved due to more electrolyte reserves.
  • the structure is simple, the processing process is simple, and the overall cost is low.
  • Figure 1 is an exploded view of the hexagonal battery of the present invention.
  • Fig. 2 is a perspective view of the hexagonal battery of the present invention.
  • Fig. 3 is a front view of the hexagonal battery of the present invention.
  • Fig. 4 is a cross-sectional view taken along line A-A of the hexagonal battery shown in Fig. 3.
  • Fig. 5 is a three-dimensional view of the non-polar ear cylindrical winding core of the present invention.
  • Fig. 6 is a front view of the non-polar ear cylindrical winding core of the present invention.
  • Fig. 7 is a cross-sectional view taken along the line A-A of the endless cylindrical winding core shown in Fig. 6.
  • Fig. 8 is an enlarged view of part A of the endless cylindrical winding core shown in Fig. 7.
  • Fig. 9 is an enlarged view of part B of the endless cylindrical winding core shown in Fig. 7.
  • Fig. 10 is a perspective view of the non-polar ear cylindrical winding core diamond combination of the present invention.
  • Fig. 11 is a side view of the non-polar ear cylindrical winding core diamond assembly of the present invention.
  • Fig. 12 is a perspective view of the trapezoidal combination of the endless cylindrical winding core of the present invention.
  • Fig. 13 is a side view of the trapezoidal combination of the endless cylindrical winding core of the present invention.
  • Fig. 14 is a perspective view of the elliptical assembly of the endless cylindrical core of the present invention.
  • Fig. 15 is a side view of the elliptical combination of the endless cylindrical core of the present invention.
  • Fig. 16 is an exploded view of the assembly of the elliptical assembly of the non-polar ear cylindrical winding core of the present invention.
  • 1 is the negative electrode cover plate
  • 2 is the insulating thermal conductive sheet
  • 3 is the negative electrode busbar
  • 4 is the metal shell
  • 5 is the battery holder
  • 6 is the non-polar lug cylindrical winding core
  • 7 is the positive electrode busbar
  • 8 is the positive electrode.
  • 11 is a negative pole
  • 12 is a liquid injection port (explosion-proof valve)
  • 61 is a core body
  • 62 is a metal cylinder.
  • FIG. 1 is an exploded view of the hexagonal battery of the present invention
  • FIG. 2 is a perspective view of the hexagonal battery of the present invention
  • FIG. 3 is a front view of the hexagonal battery of the present invention
  • the large-capacity battery designed by the present invention includes a metal shell 4, a non-polar lug cylindrical winding core 6, a positive cover plate 8, a negative electrode cover plate 1, a positive electrode busbar 7, a negative electrode busbar 3, insulation and heat conduction Sheet 2 and battery holder 5.
  • the shape of the metal housing 4 shown in FIGS. 1-4 is a hexagon.
  • the shape of the metal shell is not limited to this, and the shape of the metal shell is not limited to cylindrical or square, and can be designed into any desired shape, including hexagonal, elliptical, cylindrical, or square.
  • Figure 5 is a three-dimensional view of the endless ear cylindrical core of the present invention
  • Figure 6 is a front view of the endless cylindrical core of the present invention
  • Figure 7 is a cross-sectional view of the endless ear cylindrical core shown in Figure 6, AA line
  • Figure 8 is An enlarged view of part A of the endless ear cylindrical winding core shown in FIG. 7,
  • FIG. 9 is an enlarged view of part B of the endless ear cylindrical winding core shown in FIG. 7.
  • the endless cylindrical winding core 6 is composed of a core 61 and a metal cylinder 62 that wraps the core; one end of the endless cylindrical winding core 6 is the positive electrode substrate (such as aluminum foil), and the other end is Negative electrode substrate (such as copper foil).
  • a part of the winding core body 61 is exposed from one or both ends of the metal cylinder 62 so as to be easily clamped on the battery holder 5.
  • the metal shell 4 is provided with a number of non-polar lug cylindrical winding cores 6, the positive electrode base and the positive bus bar 7 are welded, and the negative electrode base and the negative bus bar 3 are welded to form one Roll core group.
  • the negative terminal is filled with an insulating and thermally conductive sheet 2 between the negative busbar 3 and the negative cover plate 1 for heat conduction. A number of round holes are opened on the negative bus bar 3 and the insulating and thermally conductive sheet 2 to facilitate liquid injection.
  • the negative terminal uses a battery holder 5 to fix the cylindrical winding core 6, and the battery holder 5 is clamped between the cylindrical winding cores 6 of each electrodeless lug; the upper axial position is limited by the insulating thermal conductive sheet 2 and the negative cover plate 1, and the axial lower position It is limited by a metal cylinder 62.
  • the positive electrode bus bar 7 is welded to the metal cylinder 62 at the positive end of the non-pole cylindrical winding core 6.
  • a negative pole 11 and an explosion-proof valve (not shown) are provided on the negative cover plate 1.
  • the position of the explosion-proof valve is the injection port 12. After the injection is completed, the explosion-proof valve is welded at the position of the injection port 12.
  • the combination of the endless cylindrical core 6 can be designed in various shapes, for example, Figures 10-11 show the rhombic combination of the endless cylindrical core of the present invention. Figures 12-13 show the trapezoidal combination of endless cylindrical cores of the present invention. Figures 14-15 show the elliptical combination of non-polar ear cylindrical cores of the present invention. Fig. 16 is an exploded view of the assembly of the elliptical assembly of the non-polar ear cylindrical winding core of the present invention. As shown in FIG.
  • the winding core body 61 is wrapped by a metal cylinder 62 to form a non-polar lug cylindrical winding core 6, and a part of the winding core body 61 is exposed from both ends of the metal cylinder 62; then, the non-polar lug cylindrical winding core 6
  • the elliptical assembly is assembled between the negative electrode busbar 3 and the positive electrode busbar 7; then, it is assembled in an elliptical metal casing 4 with a positive electrode cover plate 8 and a negative electrode cover plate 1.
  • the above-mentioned processing method of the large-capacity battery of the present invention includes the following steps:
  • Opening formation can also be closed after welding explosion-proof valve
  • the non-polar lug cylindrical coil core inside the large-capacity battery of the present invention is composed of positive and negative electrodes of the same system, such as lithium iron phosphate-graphite core, lithium manganate-graphite core, nickel cobalt manganate-graphite core, cobalt Lithium oxide-graphite core, lithium cobaltate-lithium titanate core, lithium manganate-lithium titanate core, supercapacitor core, metal hydride-nickel core, cadmium-nickel core, zinc-nickel coil Any one of chemical power sources such as cores, and is not limited to the above-mentioned system.
  • the non-polar lug cylindrical winding core inside the large-capacity battery of the present invention can be combined with winding cores of different material systems, such as lithium manganate-graphite winding core and nickel cobalt manganese lithium-graphite winding core combination, power type super capacitor winding core Combination with energy-type lithium-ion winding core of the same type of cathode material, etc.
  • Two types of roll cores with different characteristics are combined in parallel to form a large-capacity battery, which improves performance while reducing costs.

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Abstract

一种大容量电池及其制作方法，该电池包括铝壳、圆柱卷芯（6）、正极盖板（8）、负极盖板（1）、正极汇流片（7）、负极汇流片（3）、硅胶片和电池支架（5），圆柱卷芯（6）由卷芯体（61）和金属圆筒（62）组成，为无极耳结构；铝壳内设有圆柱卷芯（6），圆柱卷芯（6）正极端、负极端与正负极汇流片进行焊接，如此焊接成卷芯组；正极汇流片（7）与圆柱卷芯（6）的正极端的金属圆筒（62）进行焊接。通过采用高导热及高导电的金属圆筒（62）容纳圆柱卷芯（6），大幅提高单个卷芯的散热性能；通过无极耳端面焊接工艺提高单个卷芯的倍率性能；通过外壳体与金属圆筒（62）之间、金属圆筒（62）与正极端面汇流片之间两两焊接，实现整体高导热和高导电网络，降低电池内阻，提高整个大容量电池的散热性、倍率性能及长寿命。

Description

一种大容量电池及其制作方法 技术领域
本发明涉及一种大容量电池及其制作方法,属于电池技术领域。
背景技术
在现有的锂电池应用中，常涉及大容量电池的使用。众所周知相比小容量电池，大容量电池加工工艺难度大、成品率低、成本高。由于大容量电池尺寸较大，在使用时会存在大面易膨胀，散热困难、倍率性能差、循环寿命短、安全性差等问题。
因此，有人将若干小容量电池并联组合成大容量电池，例如专利申请号为201210382758.7(公开号为CN102881948A)，专利名称为一种方形锂离子电池及加工方法的发明专利，采取圆柱卷绕式卷芯，极片间隙和松紧度均匀，生产效率高。卷芯辅助模块能够支撑和保护卷芯，提高了方形电池的机械强度和安全性。通过增加卷芯的个数可以增加电池的容量。专利申请号为201621215288.5(公告号为CN206388790U)，专利名称为一种方形动力电池的实用新型，将多个圆柱形卷芯并排放入方形外壳中，组成了一个方形动力电池，解决了方形电池易膨胀的问题。专利申请号201720727978.7(公告号CN206976440U)，专利名称为一种电池包，其结构包括多个卷绕电芯及用于收容多个卷绕电芯的塑料材质的支架、这些卷绕电芯并联后形成大容量电池。但上述三个专利中所用的固定卷芯的支架或是辅助模块均为绝缘导热性能较差的材质，散热性甚至比普通大容量电池还差，无法达到提高散热、倍率性能及提高寿命的目的。
发明内容
为了解决上述问题，本发明提出了一种大容量电池的制作方法。通过采用高导热及高导电的金属圆筒容纳无极耳圆柱卷芯，金属圆筒通过焊接、粘接或一体成型等连接方式形成一个整体，再与无极耳卷芯的正极(也可以是负极)基体、正极(也可以是负极)汇流片、金属外壳焊接形成一个整体，大幅提高每个无极耳圆柱卷芯的散热性能和倍率性能；通过金属外壳与金属圆筒之间、金属圆筒与正极(也可以是负极)汇流片之间、正极(也可以是负极)基体与正极(也可以是负极)汇流片之间的两两焊接，实现整体的高导热和高导电网络，降低电池内阻，提高整个大容量电池的散热性、倍率性能及长寿命。
本发明设计的大容量电池，包括金属外壳、无极耳圆柱卷芯、正极盖板、负极盖板、正极汇流片、负极汇流片、绝缘导热片和电池支架；
金属外壳形状不局限于圆柱形或方形，可设计为任意需要的形状；
无极耳圆柱卷芯由卷芯体和包裹卷芯体的金属圆筒组成；卷芯的一端为正极基体(比如铝箔)，另一端为负极基体(比如铜箔)；
金属外壳内设有若干个无极耳圆柱卷芯，金属圆筒通过焊接、粘接或一体成型等方式连接并形成一个整体，无极耳圆柱卷芯正极基体与正极汇流片进行焊接，负极基体与负极汇流片进行焊接，如此焊接成一个卷芯组；
负极端在负极汇流片和负极盖板之间填充有绝缘导热片，用于导热；
绝缘导热片的材质具有绝缘性及较高的导热系数，可以是硅胶片、硅橡胶、橡胶等具有此特性的任何一种，且不局限于所述的这些种类。
负极汇流片和绝缘导热片上均开设有若干个圆孔，便于注液；
负极端使用电池支架固定圆柱形卷芯，电池支架卡在各无极耳圆柱卷芯之间；其轴向上方位以绝缘导热片和负极盖板限位，轴向下方位以金属圆筒限位。
正极基体、正极汇流片与无极耳圆柱卷芯的正极端的金属圆筒进行焊接；
负极盖板上设置有负极柱和防爆阀。防爆阀所在位置为注液口，完成注液后，在注液口的位置焊接防爆阀。
本发明大容量电池内部的无极耳圆柱卷芯由同样体系的正负极组成，比如磷酸铁锂-石墨卷芯、锰酸锂-石墨卷芯、镍钴锰酸锂-石墨卷芯、钴酸锂-石墨卷芯、钴酸锂-钛酸锂卷芯、锰酸锂-钛酸锂卷芯、超级电容器卷芯、金属氢化物-镍卷芯、镉-镍卷芯、锌-镍卷芯等化学电源中的任何一种，且不局限于上述体系。
同时本发明大容量电池内部的无极耳圆柱卷芯可以用不同材料体系的卷芯进行组合，例如锰酸锂-石墨卷芯与镍钴锰酸锂-石墨卷芯组合、功率型的超级电容器卷芯与同类正极材料的能量型的锂离子卷芯组合等。通过不同特性的两类卷芯并联组合成大容量电池，在提高性能的同时降低成本。
需要说明的是，不同的电池体系适用的金属种类不同，这属于本行业的公知技术，比如锂离子电池采用铝作为金属外壳和金属圆筒的材质，且无极耳圆柱卷芯的正极基体为铝箔，负极基体为铜箔；比如超级电容器和以钛酸锂为负极材料的电池，采用铝作为金属外壳和金属圆筒的材质，且无极耳圆柱卷芯的正极与负极基体均为铝箔；也可以采用不锈钢或其他材料作为金属外壳和金属圆筒的材质。
按照前述的大容量电池的加工方法包括如下步骤：
(1)将无极耳圆柱卷芯的的金属圆柱筒按照金属外壳的形状焊接为一体；
(2)将电池支架卡在无极耳圆柱卷芯负极端，固定住无极耳圆柱卷芯；
(3)将正极汇流片与无极耳圆柱卷芯的正极基体进行焊接；
(4)将负极汇流片与无极耳圆柱卷芯的负极基体进行焊接；
(5)将正极盖板与正极汇流片进行焊接；
(6)将装配好的卷芯组放入金属外壳内，并将正极盖板与金属外壳进行 焊接封闭；
(7)在负极汇流片上填充一层绝缘导热片；
(8)将负极盖板与负极汇流片进行焊接；
(9)最后将负极盖板与金属外壳进行焊接封闭。
(10)烘干内部水分；
(11)通过注液口对电池注液；
(12)开口化成(也可焊接防爆阀后进行闭口化成)；
(13)清洁注液口，并焊接防爆阀。
本发明具有如下的技术效果和优点：
1、用小容量无极耳圆柱卷芯并联成大容量单体电池，由于小容量无极耳圆柱卷芯的一致性好，大幅提高了大容量单体电池的合格率。
2、正极基体、正极汇流片与无极耳圆柱卷芯的金属圆筒进行焊接，使汇流片与无极耳圆柱卷芯的金属圆筒在焊点处融为一体，减小了连接电阻，提高了单体电池的传热速度，进而提高大容量电池的散热效率。
3、无极耳圆柱卷芯通过正负极汇流片分别与正极基体、负极基体进行激光焊接，提高了焊点面积，缩短了焊接路径，大幅提高了功率输出能力。
4、通过金属外壳与金属圆筒之间、金属圆筒与正极端面汇流片之间的两两焊接，实现整体的高导热和高导电网络，降低电池内阻，提高整个大容量电池的散热性、倍率性能及长寿命。
5、此大容量电池可在无极耳卷芯与壳体的空隙处加入电解液，生产过程的注液效率高，且可由于较多的电解液储备，提高循环寿命。
6、结构简单，加工过程简单，综合成本低。
附图说明
图1为本发明的六边形电池的***图。
图2为本发明的六边形电池的立体图。
图3为本发明的六边形电池的正面图。
图4为沿图3所示的六边形电池的A-A线的剖视图。
图5为本发明的无极耳圆柱卷芯的立体图。
图6本发明的无极耳圆柱卷芯的正面图。
图7为为图6所示的无极耳圆柱卷芯的A-A线的剖视图。
图8为图7所示的无极耳圆柱卷芯的A部放大图。
图9为图7所示的无极耳圆柱卷芯的B部放大图。
图10为本发明的无极耳圆柱卷芯菱形组合的立体图。
图11为本发明的无极耳圆柱卷芯菱形组合的侧面图。
图12为本发明的无极耳圆柱卷芯梯形组合的立体图。
图13为本发明的无极耳圆柱卷芯梯形组合的侧面图。
图14为本发明的无极耳圆柱卷芯椭圆组合的立体图。
图15为本发明的无极耳圆柱卷芯椭圆组合的侧面图。
图16为本发明的无极耳圆柱卷芯椭圆组合的装配分解图。
具体实施方式
下面结合附图详细说明本发明的具体实施方式。以下实施例用于说明本发明，但不用来限制本发明的范围。
在附图中，1为负极盖板，2为绝缘导热片，3为负极汇流片，4为金属外壳，5为电池支架，6为无极耳圆柱卷芯，7为正极汇流片，8为正极盖板，11为负极柱，12为注液口(防爆阀)，61为卷芯体，62为金属圆筒。
图1为本发明的六边形电池的***图，图2为本发明的六边形电池的立体图，图3为本发明的六边形电池的正面图，图4为沿图3所示的六边形电池的A-A线的剖视图。如图1-4所示，本发明设计的大容量电池，包 括金属外壳4、无极耳圆柱卷芯6、正极盖板8、负极盖板1、正极汇流片7、负极汇流片3、绝缘导热片2和电池支架5。图1-4中示出的金属外壳4的形状为六边形。当然，金属外壳形状不局限此，金属外壳形状不局限于圆柱形或方形，可设计为任意需要的形状，包括六边形、椭圆形、圆柱形或方形等。
图5为本发明的无极耳圆柱卷芯的立体图，图6本发明的无极耳圆柱卷芯的正面图，图7为图6所示的无极耳圆柱卷芯的A-A线的剖视图，图8为图7所示的无极耳圆柱卷芯的A部放大图，图9为图7所示的无极耳圆柱卷芯的B部放大图。如图5-9所示，无极耳圆柱卷芯6由卷芯体61和包裹卷芯体的金属圆筒62组成；无极耳圆柱卷芯6的一端为正极基体(比如铝箔)，另一端为负极基体(比如铜箔)。卷芯体61的一部分从金属圆筒62的一端或两端露出，便于卡在电池支架5上。
如图所示，金属外壳4内设有若干个无极耳圆柱卷芯6，无极耳圆柱卷芯6正极基体与正极汇流片7进行焊接，负极基体与负极汇流片3进行焊接，如此焊接成一个卷芯组。负极端在负极汇流片3和负极盖板1之间填充有绝缘导热片2，用于导热。负极汇流片3和绝缘导热片2上均开设有若干个圆孔，便于注液。
负极端使用电池支架5固定圆柱形卷芯6，电池支架5卡在各无极耳圆柱卷芯6之间；其轴向上方位以绝缘导热片2和负极盖板1限位，轴向下方位以金属圆筒62限位。正极汇流片7与无极耳圆柱卷芯6的正极端的金属圆筒62进行焊接。
如图2所示，负极盖板1上设置有负极柱11和防爆阀(未示出)。防爆阀所在位置为注液口12，完成注液后，在注液口12的位置焊接防爆阀。
另外，无极耳圆柱卷芯6组合可以设计为各种形状，比如，图10-11示出了本发明的无极耳圆柱卷芯菱形组合。图12-13示出了本发明的无极耳圆柱卷芯梯形组合。图14-15示出了本发明的无极耳圆柱卷芯椭圆组合。 图16为本发明的无极耳圆柱卷芯椭圆组合的装配分解图。如图16所示，首先，卷芯体61由金属圆筒62包裹组成无极耳圆柱卷芯6，卷芯体61的一部分从金属圆筒62的两端露出；然后，无极耳圆柱卷芯6椭圆组合装配在负极汇流片3和正极汇流片7之间；接着，再装配在具有正极盖板8和负极盖板1的椭圆金属外壳4内。
上述本发明的大容量电池的加工方法包括如下步骤：
(1)将无极耳圆柱卷芯的金属圆柱筒按照金属外壳的形状焊接为一体；
(2)将电池支架卡在无极耳圆柱卷芯负极端，固定住无极耳圆柱卷芯；
(3)将正极汇流片与无极耳圆柱卷芯的正极基体进行焊接；
(4)将负极汇流片与无极耳圆柱卷芯的负极基体进行焊接；
(5)将正极盖板与正极汇流片进行焊接；
(6)将装配好的卷芯组放入金属外壳内，并将正极盖板与金属外壳进行焊接封闭；
(7)在负极汇流片上填充一层绝缘导热片；
(8)将负极盖板与负极汇流片进行焊接，
(9)最后将负极盖板与金属外壳进行焊接封闭；
(10)烘干内部水分；
(11)通过注液口对电池注液；
(12)开口化成(也可焊接防爆阀后进行闭口化成)；
(13)清洁注液口，并焊接防爆阀。
实施例1：
本发明大容量电池内部的无极耳圆柱卷芯是由同样体系的正负极组成，比如磷酸铁锂-石墨卷芯、锰酸锂-石墨卷芯、镍钴锰酸锂-石墨卷芯、钴酸锂-石墨卷芯、钴酸锂-钛酸锂卷芯、锰酸锂-钛酸锂卷芯、超级电容器卷芯、金属氢化物-镍卷芯、镉-镍卷芯、锌-镍卷芯等化学电源中的任何一种，且不局限于上述体系。
实施例2：
本发明大容量电池内部的无极耳圆柱卷芯可以用不同材料体系的卷芯进行组合，例如锰酸锂-石墨卷芯与镍钴锰酸锂-石墨卷芯组合、功率型的超级电容器卷芯与同类正极材料的能量型的锂离子卷芯组合等。通过不同特性的两类卷芯并联组合成大容量电池，在提高性能的同时降低成本。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。

Claims (10)

  1. 一种大容量电池的制作方法，其特征在于，通过采用高导热及高导电的金属圆筒容纳无极耳圆柱卷芯，金属圆筒通过焊接、粘接或一体成型等连接方式形成一个整体，再与无极耳卷芯的正极基体、正极汇流片、金属外壳焊接形成一个整体；金属外壳与金属圆筒之间、金属圆筒与正极汇流片之间、正极基体与正极汇流片之间两两焊接,也可以将所有的负极基体、负极汇流片、金属圆筒、金属外壳之间进行两两连接。
  2. 根据权利要求1所述的大容量电池的制作方法，其特征在于，包括如下步骤：
    (1)将无极耳圆柱卷芯的金属圆筒按照金属外壳的形状焊接为一体；
    (2)将电池支架卡在无极耳圆柱卷芯的负极端，固定住无极耳圆柱卷芯；
    (3)将正极汇流片与无极耳圆柱卷芯的正极基体进行焊接；
    (4)将负极汇流片与无极耳圆柱卷芯的负极基体进行焊接；
    (5)将正极盖板与正极汇流片进行焊接；
    (6)将装配好的卷芯组放入金属外壳内，并将正极盖板与金属外壳进行焊接封闭；
    (7)在负极汇流片上填充一层绝缘导热片；
    (8)将负极盖板与负极汇流片进行焊接，
    (9)最后将负极盖板与金属外壳进行焊接封闭。
  3. 根据权利要求2所述的大容量电池的制作方法，其特征在于，还包括如下步骤：
    (10)烘干内部水分；
    (11)通过注液口对电池注液；
    (12)开口化成或者焊接防爆阀后进行闭口化成；
    (13)清洁注液口，并焊接防爆阀。
  4. 一种大容量电池，其特征在于，包括金属外壳、无极耳圆柱卷芯、正极盖板、负极盖板、正极汇流片、负极汇流片、绝缘导热片和电池支架；无极耳圆柱卷芯由卷芯体和包裹卷芯体的金属圆筒组成；卷芯的一端为正极基体，另一端为负极基体；金属外壳内设有若干个无极耳圆柱卷芯，金属圆筒通过焊接、粘接或一体成型等方式连接并形成一个整体，无极耳圆柱卷芯正极基体与正极汇流片进行焊接，负极基体与负极汇流片进行焊接，如此焊接成一个卷芯组；正极基体、正极汇流片与无极耳圆柱卷芯正极端的金属圆筒焊接在一起；负极端在负极汇流片和负极盖板之间填充有绝缘导热片，用于导热；负极汇流片和绝缘导热片上均开设有若干个圆孔，便于注液；负极端使用电池支架固定圆柱形卷芯，电池支架卡在各无极耳圆柱卷芯之间；其轴向上方位以绝缘导热片和负极盖板限位，轴向下方位以金属圆筒限位；负极盖板上设置有负极柱和防爆阀；防爆阀所在位置为注液口，完成注液后，在注液口的位置焊接防爆阀。
  5. 根据权利要求4所述的大容量电池，其特征在于，所述金属外壳形状为六边形、椭圆形、圆柱形或方形的任意需要的形状。
  6. 根据权利要求4或5所述的大容量电池，其特征在于，所述无极耳圆柱卷芯由同样体系的正负极组成。
  7. 根据权利要求6所述的大容量电池，其特征在于，所述无极耳圆柱卷芯为磷酸铁锂-石墨卷芯、锰酸锂-石墨卷芯、镍钴锰酸锂-石墨卷芯、钴酸锂-石墨卷芯、钴酸锂-钛酸锂卷芯、锰酸锂-钛酸锂卷芯、超级电容器卷芯、金属氢化物-镍卷芯、镉-镍卷芯、锌-镍卷芯化学电源中的任何一种。
  8. 根据权利要求4或5所述的大容量电池，其特征在于，所述无极耳圆柱卷芯可用不同材料体系的卷芯进行组合。
  9. 根据权利要求8所述的大容量电池，其特征在于，所述组合可为锰 酸锂-石墨卷芯与镍钴锰酸锂-石墨卷芯组合、功率型的超级电容器卷芯与同类正极材料的能量型的锂离子卷芯组合等，且不局限于上述组合。
  10. 根据权利要求4或5所述的大容量电池，其特征在于，所述绝缘导热片的材质具有绝缘性及较高的导热系数，可以是硅胶片、硅橡胶、橡胶具有此特性的任何一种。
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