WO2015074582A1 - 圆柱型碳包式锂锰电池 - Google Patents

圆柱型碳包式锂锰电池 Download PDF

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WO2015074582A1
WO2015074582A1 PCT/CN2014/091765 CN2014091765W WO2015074582A1 WO 2015074582 A1 WO2015074582 A1 WO 2015074582A1 CN 2014091765 W CN2014091765 W CN 2014091765W WO 2015074582 A1 WO2015074582 A1 WO 2015074582A1
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positive electrode
outer casing
manganese battery
disposed
negative electrode
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PCT/CN2014/091765
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English (en)
French (fr)
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王晓威
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王晓威
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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/166—Lids or covers characterised by the methods of assembling casings with lids
    • H01M50/171—Lids or covers characterised by the methods of assembling casings with lids using adhesives or sealing agents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H01M50/174—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells
    • H01M50/182—Arrangements of electric connectors penetrating the casing adapted for the shape of the cells for cells with a collector centrally disposed in the active mass, e.g. Leclanché cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/14—Cells with non-aqueous electrolyte
    • 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 present disclosure relates to batteries, and in particular, the present disclosure relates to a cylindrical carbon-coated lithium manganese battery.
  • lithium sulfinyl chloride (Li/SOCl 2 ) batteries or power lithium manganese batteries can be used in such electronic devices.
  • lithium thionyl chloride batteries have the characteristics of high battery capacity and good discharge performance, but their disadvantages are also obvious.
  • the safety is poor, and on the other hand, the acid-rich substance, thionyl chloride, is used.
  • the electrode material is such that the battery must be in a fully sealed stainless steel form to avoid leakage.
  • the battery is not environmentally friendly; the coiled (power type) lithium manganese battery is suitable for high power discharge, but relatively low battery capacity, and also has the disadvantage of poor safety. .
  • the energy type cylindrical lithium manganese battery has the advantages of high battery capacity, safety and environmental protection, but the maximum continuous discharge current and maximum pulse discharge current of such batteries are small, far lower than the widely used.
  • An energy type lithium thionyl chloride battery, and the absolute capacity of the battery is also much lower than that of the energy type lithium thionyl chloride battery.
  • the purpose of the present disclosure is to provide a cylindrical carbon-coated lithium manganese battery, which has the advantages of high capacity, good spotting performance, high safety, and environmental protection.
  • the present disclosure provides a cylindrical carbon-coated lithium manganese battery, comprising an upper cover, a sealing ring, a positive electrode pressing member, a negative electrode, an outer casing, a separator, a positive electrode, a current collecting column, and an electrolyte;
  • the negative electrode ring is disposed at the Inside the outer casing, in contact with the inner wall of the outer casing;
  • the diaphragm is disposed on the entire outer surface of the positive electrode; the diaphragm and the positive electrode are disposed in an inner space formed by the negative electrode;
  • the current collecting column is disposed in the positive electrode, a top end thereof is connected to the upper cover through the positive electrode pressing member;
  • the sealing ring is disposed between the upper cover and the outer casing;
  • the electrolyte is contained in a space within the outer casing.
  • the outer casing is provided with a rolling groove, and the inward convex portion of the rolling groove fixes the positive electrode pressing member on the positive electrode.
  • the positive electrode pressing member has a cylindrical structure, and a flat bottom is provided with a hole.
  • the material of the positive electrode is selected from one or more of PP, reinforced PP, ABS, paraformaldehyde, polytetrafluoroethylene, and other unmentioned insulating materials.
  • the cylindrical carbon-coated lithium manganese battery further includes a bottom insulating sheet, and the bottom insulating sheet is disposed at a bottom of the outer casing.
  • the present disclosure provides a method for preparing a cylindrical carbon-coated lithium manganese battery, comprising the steps of: preparing a positive electrode, mixing the transformed electrolytic manganese dioxide, polytetrafluoroethylene, and conductive acetylene black in a certain ratio. Uniformly, granules of the desired size are formed by a granulator, and then pressed into a positive electrode by a molding machine, and a separator is coated on the entire outer surface of the positive electrode, and dried for use; and a negative electrode is prepared, and a lithium strip as a negative electrode is cut into a chamber.
  • the size is required to be placed in the outer casing and positioned so as to be in close contact with the inner wall of the outer casing, and dried for use; electrolyte preparation, lithium perchlorate, ethylene glycol dimethyl ether, 1,3-dioxane, propylene carbonate Mixing in a certain ratio, drying to a moisture content of less than 50 ppm, standby; and an assembly step comprising the following steps:
  • Step 1 taking out the outer casing that has been equipped with the negative electrode, and then putting the prepared positive electrode wrapped in a separator into the outer casing in which the negative electrode is mounted, to a suitable position, and making the same The negative electrode is in close contact;
  • Step 2 placing a positive electrode pressing member above the positive electrode and in close contact with the positive electrode;
  • Step 3 feeding the outer casing of the negative electrode, the separator, the positive electrode and the positive electrode pressing member into a rolling groove of a rolling groove machine, so that the outer casing is deformed after the positive pressure member is grooved a protrusion is fixed on the positive electrode;
  • Step 4 placing a positive current collecting column into the positive electrode
  • Step 5 injecting the prepared electrolyte into the outer casing and letting it stand for a while;
  • step 6 the sealing ring and the upper cover are sequentially placed in the opening of the casing after the rolling groove, and finally sent to the sealing of the sealing machine.
  • the method for preparing the cylindrical carbon-coated lithium manganese battery further comprises the step of placing a bottom insulating sheet into the bottom of the outer casing before the lithium tape is placed in the outer casing.
  • the positive electrode pressing member has a cylindrical structure, and a flat bottom is provided with a hole.
  • the material of the pressing member is selected from one or more of PP, reinforced PP, ABS, paraformaldehyde, polytetrafluoroethylene, and other unmentioned insulating materials.
  • the cylindrical carbon-coated lithium manganese battery of the present disclosure has a positive electrode pressing member placed above the positive electrode, and the pressing member is fixed on the positive electrode by the inward convex portion of the battery casing rolling groove, thereby preventing the discharge process.
  • the internal resistance of the battery is increased due to the expansion of the positive electrode; at the same time, due to the space inside the cylindrical pressing member, a sufficient amount of electrolyte can be stored to improve the performance of the battery; the cylindrical carbon-coated lithium manganese battery of the present disclosure,
  • the entire outer surface of the positive electrode is wrapped by the separator to prevent the positive electrode from overflowing and forming a micro short circuit in the battery. Therefore, the cylindrical carbon-coated lithium manganese battery of the present disclosure can perform continuous discharge and pulse discharge with a large current, thereby improving the discharge performance of the battery, and the battery has a simple structure and a low production cost for promotion.
  • FIG. 1 is a schematic view of a battery of the present disclosure
  • FIG. 2 is a cross-sectional view of the battery of the present disclosure
  • Figure 3 is an exploded view of the battery of the present disclosure
  • FIG. 4A is a front elevational view of an embodiment of a positive electrode press of the present disclosure.
  • 4B is a plan view of an embodiment of a positive electrode press of the present disclosure.
  • Figure 4C is a cross-sectional view taken along line A-A of Figure 4B;
  • 5A is a front elevational view of another embodiment of a positive electrode press of the present disclosure.
  • 5B is a plan view of another embodiment of a positive electrode press of the present disclosure.
  • Figure 5C is a cross-sectional view taken along line A-A of Figure 5B;
  • 6A is a discharge graph of a CR14250SE type battery of the present disclosure
  • 6B is a discharge graph of a conventional CR14250SE type battery
  • Fig. 6C is a discharge graph of a conventional ER14250 battery.
  • the cylindrical carbon-coated lithium manganese battery comprises an upper cover 1 , a sealing ring 2 , a positive electrode pressing member 3 , a negative electrode 4 , a casing 5 , a separator 6 , and a positive electrode 7 .
  • the negative electrode 4 is disposed in the outer casing 5 and is in contact with the inner wall of the outer casing 5.
  • the negative electrode 4 is a lithium strip.
  • the separator 6 covers the entire outer surface of the positive electrode 7, and is disposed in the inner space formed by the negative electrode 4.
  • the separator 6 covers the entire outer surface of the positive electrode 7 to prevent the positive electrode 7 from expanding during the discharge of the battery or the positive electrode 7 from overflowing due to other causes, thereby preventing the micro-short circuit from occurring inside the battery.
  • the separator 6 may be one layer or multiple layers.
  • the membrane 6 can be, for example, a polypropylene felt membrane, or other membrane made of an insulating and ion penetrating material.
  • the positive electrode member 3 is disposed on the positive electrode 7.
  • the positive electrode member 3 may be selected from one or more of PP, reinforced PP, ABS, paraformaldehyde, polytetrafluoroethylene, and other unmentioned insulating materials.
  • the positive electrode member 3 may be cylindrical, and a through hole 31 may be formed in the flat bottom. As shown in Figs. 5A, 5B and 5C, the positive electrode member 3 may also have a portion in which the upper edge of the cylinder projects inward.
  • the flat bottom of the pressing member 3 may have a plurality of through holes 31 as shown in FIG. 4B, or a through hole 31 may be formed as shown in FIG. 5B.
  • the space inside the positive electrode member 3 allows the battery of the present disclosure to accommodate a sufficient amount of electrolyte, thereby reducing the internal resistance of the battery and improving the performance of the battery.
  • the inwardly projecting portion 51 on the battery case 5 fixes the positive electrode member 3 to the positive electrode 7.
  • the collecting column 8 is disposed in the positive electrode 7, and its tip end is connected to the upper cover 1 through the positive electrode pressing member 3.
  • the seal ring 2 is disposed between the upper cover 1 and the outer casing 5.
  • the bottom insulator 9 is disposed at the bottom of the outer casing 5.
  • the electrolyte accommodates the space within the housing.
  • the cylindrical carbon-coated lithium manganese battery of the present disclosure can be produced by the following method. Including: positive electrode preparation, negative electrode preparation, electrolyte preparation and assembly steps.
  • the preparation of the positive electrode includes, after transformation, electrolytic manganese dioxide, polytetrafluoroethylene, conductive acetylene black, etc., in a certain ratio, for example, 80-90 wt.% of manganese dioxide, 1-15 wt.% of polytetrafluoroethylene, 1- 15wt.% conductive acetylene black and the like are uniformly mixed, and then granulated into pellets of a desired size, and placed in a molding machine to form a desired shape such as a hollow cylinder (the hollow portion is for accommodating the collecting column 8), that is, Forming the positive electrode 7 and tightly wrapping the outer layer 7
  • the preparation of the negative electrode includes cutting the lithium tape as a negative electrode into a desired size, placing it in the outer casing 5, positioning it so as to be in close contact with the inner wall of the battery can 5, and storing it for later use.
  • the preparation of the electrolyte includes: lithium perchlorate, ethylene glycol dimethyl ether, 1,3-dioxane, propylene carbonate and the like in a certain ratio, for example, 5-15 wt.% of lithium chlorate, 10-90 wt. .% ethylene glycol dimethyl ether, 10-90 wt.% 1,3-dioxane and 10-90 wt.% propylene carbonate are mixed and dried to a moisture content of less than 50 ppm, and used.
  • the assembly step comprises the following steps: Step 1, taking out the outer casing 5 already equipped with the negative electrode 4, and then placing the prepared positive electrode 7 wrapped with the separator 6 into the outer casing 5 in which the negative electrode 4 is mounted, to a suitable position, and Bringing it into close contact with the negative lithium strip; in step 2, placing the positive electrode 3, placing it above the positive electrode 5 and in close contact with the positive electrode 5, with a battery separator 6 separated; and step 3, loading the negative electrode 4, the separator 6.
  • the outer casing 5 of the positive electrode 7 and the positive electrode pressing member 3 is fed into the rolling groove of the rolling groove machine, so that the convex portion 51 formed by deforming the inner casing 3 after the positive pressure pressing member 3 is grooved is fixed on the positive electrode 7;
  • the collecting column 8 is placed in the positive electrode 7; in step 5, the prepared electrolyte is injected into the battery can 5 and left to stand for a while; in step 6, the sealing ring 2 and the upper cover are sequentially placed in the mouth of the casing 5 after the rolling groove 1. Finally, it is sent to the sealing machine to form a battery.
  • the battery of the present disclosure is continuously discharged at a current of 1 mA and 10 mA under conditions of 1 mA, 23 ⁇ 2 ° C, and the discharge curve is shown in Fig. 6A. It can be seen that the capacity of the 1 mA continuous discharge of the CR14250SE type battery of the present disclosure reaches 1100 mAh, and the capacity of continuous discharge with a large current of 10 mA can also reach 900 mAh. The existing CR14250SE battery can hardly achieve high current continuous discharge of up to 10mA.
  • Fig. 6B shows the discharge curve of the current CR14250SE battery discharged continuously at a current of 0.5 mA and 6.3 mA.
  • the existing CR14250SE battery has a capacity of 0.5 mA continuous discharge of up to 850 mAh, and a current of 6.3 mA.
  • the capacity for continuous discharge is only 550 mAh.
  • 6C shows a discharge curve of a conventional lithium ion thionyl chloride battery of the same type (ER14250) discharged at a current of 8.5 mA and 1.2 mA. It can be seen from the figure that the current ER14250 lithium thionyl chloride battery is continuously discharged at a current of 1.2 mA.
  • the capacity is 1200 mAh, and the capacity for continuous discharge at 8.5 mA is 850 mAh.
  • the cylindrical carbon-coated lithium manganese battery of the present disclosure is more than 20% higher than the battery capacity battery of the existing battery of the same type, and the battery capacity and discharge performance thereof are the same as those of the existing lithium thionyl chloride battery of the same type.
  • the discharge performance is almost equal.
  • the battery prepared by the preparation process has high safety, is suitable for large current discharge, and has good discharge performance.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Primary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

圆柱型碳包式锂锰电池，包括上盖（1）、密封圈（2）、正极压件（3）、负极（4）、外壳（5）、隔膜（6）、正极（7）、集流柱（8）和电解液；负极环设于外壳内，与外壳接触；隔膜设置正极的整个外表面；隔膜和正极设置在负极形成的内部空间中；正极压件设置在正极上；集流柱设置在正极中，其顶端穿过正极压件与上盖连接；密封圈设置在上盖和外壳之间；电解液容纳于外壳内的空间中。还提供一种圆柱型碳包式锂锰电池的制备方法。圆柱型碳包式锂锰电池，可以以较大的电流进行连续放电和进行脉冲放电，提高了电池的放电性能。

Description

圆柱型碳包式锂锰电池
本公开基于申请号为201320732883.6、申请日为2013年11月20日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本公开涉及电池，具体地，本公开涉及一种圆柱型碳包式锂锰电池。
背景技术
随着时代的发展，科技的进步，以及人们对绿色环保理念的加强，新型的电子设备正向着低功耗，便携式，环保的方向发展。目前作为绿色环保的新型一次锂电池中能够应用在此类电子设备中的主要是锂亚硫酰氯(Li/SOCl2)电池或功率型锂锰电池。众所周之，锂亚硫酰氯电池虽然具有电池容量高，放电性能好的特点，但是它的缺点也很明显，一方面安全性差，另一方面由于采用酸性较强的物质-亚硫酰氯作为电极材料，使得电池必须用不锈钢全密封的形式，以避免泄露。但由于材料的原因，无法完全避免泄露，因而这类电池不环保；卷绕式(功率型)锂锰电池虽然适合高功率放电，但相对来说电池容量较低，而且同样存在安全性差的缺点。与上述两类电池相比能量型圆柱式锂锰电池具有电池电容量高、安全、环保的优点，但是这类电池的最大连续放电电流和最大脉冲放电电流均较小，远低于用途广泛的能量型锂亚硫酰氯电池，且电池的绝对容量也比能量型锂亚硫酰氯电池低很多。
发明内容
本公开的目的在于提供一种圆柱型碳包式锂锰电池，其具有高容量、放点性能好、安全性高、绿色环保等优点。
一方面，本公开提供一种圆柱型碳包式锂锰电池，包括上盖、密封圈、正极压件、负极、外壳、隔膜、正极、集流柱和电解液；所述负极环设于所述外壳内，与所述外壳内壁接触；所述隔膜设置所述正极的整个外表面；所述隔膜和所述正极设置在所述负极形成的内部空间中；所述正极压件设置在所述正极上；所述集流柱设置在所述正极中，其顶端穿过所述正极压件与所述上盖连接；所述密封圈设置在所述上盖和所述外壳之间；所述电解液容纳于所述外壳内的空间中。
优选地，所述外壳设置有滚槽，所述滚槽向内的凸起部将所述正极压件固定在所述正极上。
优选地，所述正极压件为圆筒结构，其平底部开设有孔。
优选地，所述正极压件的材质选自PP、增强PP、ABS、多聚甲醛、聚四氟乙烯、以及其它未提及的绝缘材料中的一种或多种。
优选地，所述圆柱型碳包式锂锰电池还包括底部绝缘片，所述底部绝缘片设置在外壳底部。
另一方面，本公开提供一种圆柱型碳包式锂锰电池的制备方法，包括以下步骤：正极的制备，将转型后的电解二氧化锰，聚四氟乙烯，导电乙炔黑按一定比例混合均匀，经过造粒机制成所需大小的颗粒，然后放入成型机压制成正极，在所述正极整个外表面包覆隔膜，烘干备用；负极制备，将作为负极的锂带裁切成所需尺寸，放入外壳后定位，使其与外壳内壁紧密接触，干燥备用；电解液制备，将高氯酸锂，乙二醇二甲醚，1,3-二氧五环，碳酸丙烯酯按一定比例混合，干燥至水分含量小于50ppm以下，备用；以及组装步骤，所述组装步骤包括以下步骤：
步骤1，取出前述已装有所述负极的所述外壳，然后将制备好的以隔膜包裹好的正极放入已装所述负极的所述外壳中，至合适位置，并使之与所述负极紧密接触；
步骤2，将正极压件置于所述正极上方并与所述正极紧密接触；
步骤3，将装入所述负极、所述隔膜、所述正极和所述正极压件的所述外壳送入滚槽机滚槽，使所述正极压件被滚槽后所述外壳变形后的凸起固定在所述正极上；
步骤4，将正极集流柱放入所述正极中；
步骤5，向所述外壳中注入制备好的所述电解液，静置一段时间；以及
步骤6，在滚槽后的所述外壳开口部依次放置密封圈和上盖，最后送入封口机封口。
优选地，所述圆柱型碳包式锂锰电池的制备方法还包括：在所述锂带放入所述外壳之前，将底部绝缘片放入所述外壳底部步骤。
优选地，所述正极压件为圆筒结构，其平底部开设有孔。
优选地，所述压件的材质选自PP、增强PP、ABS、多聚甲醛、聚四氟乙烯、以及其它未提及的绝缘材料中的一种或多种。
与现有技术相比，本公开的圆柱型碳包式锂锰电池，正极压件置于正极上方，利用电池外壳滚槽的向内凸起部将压件固定于正极上方，可以防止放电过程中正极膨胀从而造成的电池内阻提高；同时由于圆筒形的压件其内部一定空间，可以储存足量的电解液，从而提高电池的性能；本公开的圆柱型碳包式锂锰电池，正极整个外表面被隔膜包裹，可以防止正极溢出在电池内形成微短路。因此，本公开的圆柱型碳包式锂锰电池可以以较大的电流进行连续放电和脉冲放电，提高了电池的放电性能，且该电池结构简单，生产成本低便于推广。
附图说明
图1是本公开的电池的示意图；
图2是本公开的电池的剖视图；
图3是本公开的电池的爆炸图；
图4A是本公开的正极压件一实施方式的主视图；
图4B是本公开的正极压件一实施方式的俯视图；
图4C是图4B中A-A向剖视图；
图5A是本公开的正极压件的另一实施方式的主视图；
图5B是本公开的正极压件的另一实施方式的俯视图；
图5C是图5B中A-A向剖视图；
图6A是本公开的CR14250SE型电池的放电曲线图；
图6B是现有CR14250SE型电池的放电曲线图；以及
图6C是现有ER14250型电池的放电曲线图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
请参阅图1、图2和图3，本实施例中，圆柱型碳包式锂锰电池包括上盖1、密封圈2、正极压件3、负极4、外壳5、隔膜6、正极7、集流柱8、电解液(未示出)和底部绝缘片9。负极4环设于外壳5内，与外壳5内壁接触，在本实施例中负极4是锂带。隔膜6包覆正极7的整个外表面，设置在负极4形成的内部空间。隔膜6包覆正极7的整个外表面可以防止电池放电过程中正极7膨胀或者其他原因导致的正极7溢出，从而可以防止电池内部由此产生微短路。隔膜6可以是一层，也可以是多层。隔膜6可以是例如聚丙烯毡隔膜，或其他具有绝缘性又具有离子穿透能力的材料制成的隔膜。正极压件3设置在正极7上。正极压件3可以选自PP、增强PP、ABS、多聚甲醛、聚四氟乙烯、以及其它未提及的绝缘材料中的一种或多种。电池外壳51的滚槽的向内凸起部51将压件3固定于正极7上方，可以防止放电过程中正极膨胀从而造成的电池内阻提高。如图4A、图4B和图4C所示，正极压件3可以是圆筒形，平底部可以开设通孔31。如图5A、图5B和图5C所示，正极压件3也可以是圆筒上缘向内伸出一部分。压件3的平底部可以如图4B所示开设多个通孔31，也可以如图5B所示开设一个通孔31。正极压件3内部的空间可以使本公开的电池容纳足够的电解液，从而减低电池的内阻、提高电池的性能。电池外壳5上的滚槽向内的凸起部51将正极压件3固定在正极7上。集流柱8设置在正极7中，其顶端穿过正极压件3与上盖1连接。密封圈2设置在上盖1和外壳5之间。底部绝缘件9设置在外壳5底部。电解液容纳外壳内的空间中。
本公开的圆柱型碳包式锂锰电池可以由以下方法制备。包括：正极制备、负极制备、电解液制备和组装步骤。正极制备包括，将转型后的电解二氧化锰，聚四氟乙烯，导电乙炔黑等按一定比例，例如80-90wt.％的二氧化锰、1-15wt.％的聚四氟乙烯、1-15wt.％导电乙炔黑等混合均匀，然后经过造粒机制成所需大小的颗粒，放入成型机压制成所需要的形状例如中空的圆柱体(中空部分用于容纳集流柱8)，即形成正极7，在正极7外面紧紧包裹一层 以上的隔膜6，例如聚丙烯毡隔膜或其他具有绝缘性又具有离子穿透能力的材料制成的隔膜，烘干备用。负极制备包括，将作为负极的锂带裁切成所需尺寸，放入外壳5后定位，使其与电池外壳5内壁紧密接触，干燥储存备用。电解液制备包括，将高氯酸锂，乙二醇二甲醚，1,3-二氧五环，碳酸丙烯酯等物质按一定比例，例如5-15wt.％的氯酸锂、10-90wt.％的乙二醇二甲醚、10-90wt.％的1,3-二氧五环和10-90wt.％的碳酸丙烯酯混合，干燥至水分含量小于50ppm以下，备用。组装步骤包括以下步骤：步骤1，取出前述已装有负极4的外壳5，然后将制备好的以隔膜6包裹好的正极7放入已装有负极4的外壳5中，至合适位置，并使之与负极锂带紧密接触；步骤2，放入正极压件3，置于正极5上方并与正极5紧密接触，之间有电池隔膜6隔开；步骤3，将装入负极4、隔膜6、正极7和正极压件3的外壳5送入滚槽机滚槽，使正极压件3被滚槽后外壳5变形向内形成的凸起部51固定在正极7上；步骤4，将集流柱8放入正极7中；步骤5，向电池外壳5中注入制备好的电解液，静置一段时间；步骤6，在滚槽后的外壳5口部依次放置密封圈2和上盖1，最后送入封口机封口形成电池。
以CR14250SE型为例，本公开的电池在1mA，23±2℃的条件下，以1mA和10mA电流连续放电，放电曲线参见图6A。可以看出，本公开的CR14250SE型电池1mA连续放电的容量高达到1100mAh，以大电流10mA连续放电的容量也能够达到900mAh。而现有CR14250SE型电池几乎不能实现高达10mA的大电流连续放电。图6B示出现有CR14250SE型电池以0.5mA和6.3mA电流连续放电的放电曲线，从图中可以看出，现有CR14250SE型电池0.5mA连续放电的容量可达850mAh，而以较大电流6.3mA连续放电的容量仅为550mAh。图6C示出现有同型号(ER14250)锂亚硫酰氯电池以8.5mA和1.2mA电流连续放电的放电曲线，从图中可以看出，现有ER14250型锂亚硫酰氯电池1.2mA电流连续放电的容量为1200mAh，以8.5mA连续放电的容量为850mAh。由此可见，本公开的圆柱型碳包式锂锰电池比现有同型号电池的电池容量电池高20％以上，其电池容量和放电性能与现有同型号锂亚硫酰氯电池的电池容量和放电性能几乎相当。并且采用此制备工艺制成的电池安全性高、适于大电流放电、放电性能好。
对于本领域技术人员而言，显然本公开不限于上述示范性实施例的细节，而且在不背离本公开的精神或基本特征的情况下，能够以其他的具体形式实现本公开。因此，无论从哪一点来看，均应将实施例看作是示范性的，而且是非限制性的，本公开的范围由所附权利要求而不是上述说明限定，因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本公开内。不应将权利要求中的任何附图标记视为限制所涉及的权利要求。
以上所述仅为本公开的较佳实施例，并不用以限制本公开，凡在本公开的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。

Claims (9)

  1. 一种圆柱型碳包式锂锰电池，包括上盖、密封圈、正极压件、负极、外壳、隔膜、正极、集流柱和电解液；所述负极环设于所述外壳内，与所述外壳内壁接触；所述隔膜设置所述正极的整个外表面；所述隔膜和所述正极设置在所述负极形成的内部空间中；所述正极压件设置在所述正极上；所述集流柱设置在所述正极中，其顶端穿过所述正极压件与所述上盖连接；所述密封圈设置在所述上盖和所述外壳之间；所述电解液容纳于所述外壳内的空间中。
  2. 根据权利要求1所述的圆柱型碳包式锂锰电池，其中所述外壳设置有滚槽，所述滚槽向内的凸起部将所述正极压件固定在所述正极上。
  3. 根据权利要求1所述的圆柱型碳包式锂锰电池，其中所述正极压件为圆筒结构，其平底部开设有孔。
  4. 根据权利要求1所述的圆柱型碳包式锂锰电池，其中所述正极压件的材质为选自PP、增强PP、ABS、多聚甲醛、聚四氟乙烯、以及其它未提及的绝缘材料中的一种或多种。
  5. 根据权利要求1所述的圆柱型碳包式锂锰电池，其中所述圆柱型碳包式锂锰电池还包括底部绝缘片，所述底部绝缘片设置在外壳底部。
  6. 一种圆柱型碳包式锂锰电池的制备方法，包括以下步骤：
    -正极的制备，将转型后的电解二氧化锰，聚四氟乙烯，导电乙炔黑按一定比例混合均匀，经过造粒机制成所需大小的颗粒，然后放入成型机压制成正极碳包，在所述正极碳包整个外表面包覆隔膜，烘干备用；
    -负极制备，将作为负极的锂带裁切成所需尺寸，放入外壳后定位，使其与所述外壳内壁紧密接触，干燥备用；
    -电解液制备，将高氯酸锂，乙二醇二甲醚，1,3-二氧五环，碳酸丙烯酯按一定比例混合，干燥至水分含量小于50ppm以下，备用；以及
    -组装步骤，所述组装步骤包括以下步骤：
    步骤1，取出前述已装有所述负极的所述外壳，然后将制备好的以所述隔膜包裹好的正极放入已装有所述负极的所述外壳中，至合适位置，并使之与所述负极紧密接触；
    步骤2，将正极压件置于所述正极上方并与所述正极紧密接触；
    步骤3，将装入所述负极、所述隔膜、所述正极和所述正极压件的所述外壳送入滚槽机滚槽，使所述正极压件被滚槽后所述外壳变形后的向内凸起部固定在所述正极上；
    步骤4，将正极集流柱放入所述正极中；
    步骤5，向所述外壳中注入制备好的所述电解液，静置一段时间；以及
    步骤6，在滚槽后的所述外壳开口部依次放置密封圈和上盖，最后送入封口机 封口。
  7. 根据权利要求6所述圆柱型碳包式锂锰电池的制备方法，还包括：在所述锂带放入所述外壳之前，将底部绝缘片放入所述外壳底部步骤。
  8. 根据权利要求6所述圆柱型碳包式锂锰电池的制备方法，其中所述正极压件为圆筒结构，其平底部开设有孔。
  9. 根据权利要求6所述圆柱型碳包式锂锰电池的制备方法，其中所述压件的材质为选自PP、增强PP、ABS、多聚甲醛、聚四氟乙烯、以及其它未提及的绝缘材料中的一种或多种。
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CN106887635A (zh) * 2017-04-01 2017-06-23 帅福得（珠海保税区）电池有限公司 一种低成本的电池及其装配工艺
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CN114665197A (zh) * 2022-03-22 2022-06-24 江西九鼎动力新能源科技有限公司 一种锂离子圆柱电池及其生产工艺
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