WO2010127542A1 - 圆柱形电池及其制造方法 - Google Patents

圆柱形电池及其制造方法 Download PDF

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Publication number
WO2010127542A1
WO2010127542A1 PCT/CN2009/075432 CN2009075432W WO2010127542A1 WO 2010127542 A1 WO2010127542 A1 WO 2010127542A1 CN 2009075432 W CN2009075432 W CN 2009075432W WO 2010127542 A1 WO2010127542 A1 WO 2010127542A1
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WO
WIPO (PCT)
Prior art keywords
tab
pole
hole
cylindrical battery
limiting body
Prior art date
Application number
PCT/CN2009/075432
Other languages
English (en)
French (fr)
Inventor
陈保同
刘铭
王春光
任灿
Original Assignee
深圳市比克电池有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CN200910107238.3A external-priority patent/CN101882690B/zh
Priority claimed from CN2009101072398A external-priority patent/CN101882686A/zh
Application filed by 深圳市比克电池有限公司 filed Critical 深圳市比克电池有限公司
Publication of WO2010127542A1 publication Critical patent/WO2010127542A1/zh

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Classifications

    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0431—Cells with wound or folded electrodes
    • 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
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
    • 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 invention relates to a cylindrical battery and a method of manufacturing the same.
  • the cylindrical battery generally includes a cylindrical casing 1, a pole group 3 which is formed by winding in the casing 1, a cover plate 2 installed at one end of the casing 1, and a middle portion 3 which is disposed in the middle of the pole group 3.
  • a cylindrical steel core 4 and an insulating plate 6 for insulating the cover 2 and the pole group 3 are separated.
  • this type of cylindrical battery still has a need for improvement and improvement.
  • the technical problem to be solved by the present invention is to provide a cylindrical battery and a method of manufacturing the same.
  • the technical solution adopted by the present invention to solve the technical problem thereof is: a cylindrical battery comprising a casing, a pole group, a support column, a first pole and a limiting body, and the pole group is disposed inside the outer casing, the pole The group has a shaft hole extending in the axial direction of the support column, the support column is disposed in the shaft hole, the first pole is drawn from the pole group, and the limiting body is disposed inside the outer casing and restricting the support column in the axial direction Move on.
  • the limiting body can be pressed against the upper end surface of the pole set, and the limiting body has a pole hole, and the first pole ear passes upwardly out of the pole ear hole.
  • the limiter can be an insulator.
  • a cylindrical battery comprising a housing, a cover, a pole set, a support post, a limiting body, a first tab and a second tab, the housing having a bottom and a top opening, the cover being fixed to the top opening, the pole
  • the group is located inside the outer casing, and the middle portion of the pole group has a shaft hole extending in the axial direction of the support column, the support column is disposed in the shaft hole, and the limiting body is positioned inside the outer casing and pressed on the upper end surface of the pole group
  • the limiting body has a pole hole, the first pole and the second pole are all drawn from the pole group, and the first pole passes upward through the pole hole and is connected to the cover plate, the second ear Conducting with the outer casing, the limiting body separates the cover from the pole assembly, and the limiting body limits the axial movement of the supporting column.
  • the first projection of the polar ear hole in the plane of the vertical axis may be located in the second projection of the support column on the plane, or the first projection and the second projection only partially overlap, or the first projection and the second projection Completely separate.
  • the aperture of the polar ear hole may be smaller than the diameter of the support column; or the projection misalignment of the polar ear hole and the support column in a plane perpendicular to the axial direction; or the shape of the polar ear hole is an irregular shape that restricts the axial movement of the support column.
  • the radial position of the pole hole on the limiting body can correspond to the radial position of the first tab from the pole set, and the pole hole can be an arc hole for accommodating the first tab, which can be limited
  • the first tab is shaken in the ear hole to ensure the stability of the battery structure.
  • the portion of the first tab located between the pole set and the terminating body may extend vertically upward to better maintain a secure connection between the first tab and the connected wound pole piece.
  • the limiter can be pressed directly onto the upper end of the support column to further limit the axial movement of the support column.
  • the positioning body may be provided with a positioning detecting element for finding a completely corresponding position of the first tab and the tab hole.
  • a method of manufacturing a cylindrical battery comprising:
  • Support column installation step loading the support column into the shaft hole in the middle of the pole group
  • the limiting body mounting step places the limiting body on the upper end surface of the pole group to limit the axial movement of the supporting column, and allows the first pole from the pole group to pass through the limiting body Polar ear hole
  • the limit body installation step may include the following steps:
  • the groove can be rolled on the outer casing by the roll groove process, so that the limit body is stuck under the groove.
  • the limiting body can prevent the supporting column from moving up and down in the axial direction during assembly or use of the battery, so as to avoid the occurrence of the laminated positive and negative electrode sheets in the pole group due to lack of support. Loosening, thereby avoiding the increase of the internal resistance of the battery due to the looseness of the positive and negative sheets, reducing the life and even causing the battery to fail, significantly improving the battery performance and working efficiency, and improving the life of the battery.
  • Figure 1 is a cross-sectional view of a prior art cylindrical battery
  • Figure 2 is a cross-sectional view showing an embodiment of a cylindrical battery of the present invention
  • FIG. 3 to FIG. 5 are respectively perspective views of three embodiments of the limiting body of the cylindrical battery of the present invention.
  • FIG. 6 is a cross-sectional view showing a support post placed in a middle portion of a pole group in an embodiment of a method of manufacturing a cylindrical battery of the present invention
  • FIG. 7 is a cross-sectional view showing an end face of a pole group placed on an upper end surface of a pole group in an embodiment of a method of manufacturing a cylindrical battery of the present invention
  • FIG. 8 is a cross-sectional view showing a process of a roll groove in an embodiment of a method of manufacturing a cylindrical battery of the present invention.
  • the cylindrical battery includes a casing 1, a pole group 3, a support column 4, a first pole 51, and a limiting body 6.
  • the pole group 3 is disposed inside the outer casing 1, and the pole group 3 has A shaft hole 31 extending in the axial direction of the support column 4, the support column 4 is disposed in the shaft hole 31, the first tab 51 is taken out from the pole group 3, and the limiting body 6 is disposed inside the outer casing 1 and supports the support column 4 movement in the axial direction.
  • the upper and lower movements of the support column are restricted by the limiting body, so as to prevent the positive and negative electrode sheets wound in the laminated pole group from loosening, thereby increasing the internal resistance of the battery, thereby affecting the working efficiency and working stability of the battery.
  • the outer casing 1 is generally made of aluminum (A1), iron (Fe) or a metal alloy containing aluminum or iron. Of course, it can also be made of other metal materials that are electrically conductive and meet the strength and use requirements.
  • the pole set 3 is the core component of the cylindrical battery, and the pole set 3 can be laminated and wound to form a cylindrical winding for the positive electrode sheet coated with the positive electrode active material and the negative electrode sheet coated with the negative electrode active material.
  • an insulating layer for separating the two from each other between the positive electrode sheet and the negative electrode sheet is provided in the winding body. An electrolyte is injected between them.
  • the pole set 3 can be rotated in synchronism with the outer casing 1.
  • the support column 4 is used to support the pole set 3, and the support column 4 can be tightly fitted with the shaft hole 31.
  • the first tab 51 may be connected to the positive electrode of the pole set 3 or to the negative electrode of the pole set 3.
  • the limiting body 6 can be pressed against the upper end face 32 of the pole set 3, which can have a pole hole 61 through which the first pole 51 passes upwards.
  • the first tab 51 may have a vertical portion 511 and a bent portion 512, which may be located between the limiting body 6 and the pole set 3, and the bent portion 512 may be located above the limiting body 6.
  • the limiting body 6 can be an insulator, that is, the limiting body acts as an insulation and a limit; the limiting body can also only serve as a limiting function, and the other component acts as an insulation.
  • the cylindrical battery includes a casing 1, a cover plate 2, a pole group 3, a support column 4, a limiting body 6, a first tab 51 and a second tab 52.
  • the bottom of the outer casing 1 is closed to form a closed end 13, and the top of the outer casing 1 is open to form an open end 14.
  • the cover 2 encloses the open end 14 of the outer casing 1.
  • the pole group 3 is mounted inside the outer casing 1, and the middle portion of the pole group 3 has a shaft hole 31 extending in the axial direction of the support column 4, and the support column 4 is disposed in the shaft hole 31.
  • the limiting body 6 is positioned inside the outer casing 1 and pressed on the upper end surface 32 of the pole set 3.
  • the limiting body 6 has a pole hole 61, and the first pole 51 and the second pole 52 are both led out from the pole set 3, a tab 51 is passed up through the tab hole 61 and electrically connected to the cover 2, and the second tab 52 is connected to the closed end 13 of the housing 1, and the limiting body 6 insulates the cover 2 from the pole set 3, and The limiting body 6 limits the movement of the support column 4 in the axial direction.
  • the cover 2 may have an electrode cover for direct contact with the electrodes of the appliance, and may also include components such as a printed circuit board, a temperature control device, an insulating filler, and the like.
  • the first tab 51 and the second tab 52 extend from the upper and lower portions of the pole group 3, respectively, and are respectively connected to the positive and negative tabs of the pole group.
  • the first tab 51 may be connected to the positive electrode tab and the second tab 52 may be connected to the negative electrode tab, or the first tab may be connected to the negative electrode tab and the second tab may be connected to the positive electrode tab.
  • the first tab 51 can be directly soldered to the electrode sheet 21 of the cover 2 to electrically connect the first tab 51 to the cover 2.
  • the second tab 52 can be soldered directly to the closed end 13 of the outer casing 1 to effect electrical connection of the second tab 52 to the outer casing 1.
  • the open end 14 of the outer casing 1 can have an inwardly radially extending bead 11 for enclosing and securing the cover 2 to the interior of the outer casing 1.
  • the outer casing 1 may further have a groove 12 formed by rolling, and the groove 12 is disposed between the cover plate 2 and the pole group 3 and is used to separate the cover plate 2 from the pole group 3, and is pressed upward and downward respectively. Pressure Fix the position of the cover plate 2 and the pole group 3 position. The limiting body 6 can be caught under the recess 12 and insulate the cover 2 from the pole set 3.
  • the limiting body 6 may be entirely made of an insulating material or may be made only partially of an insulating material.
  • FIG. 2 An embodiment of the limiting body is shown in FIG. 2.
  • the limiting body 6 has a circular sheet-like structure, is pressed on the upper end surface of the pole group 3 and is caught under the recess 12 on the outer casing 1.
  • the cover plate 2 and the pole set 3 are insulated from each other, and the limiter body 6 can not only prevent the support column 4 from moving up and down in the axial direction, but also has a pole hole 61 through which the first tab 51 can pass.
  • the radial position of the tab hole 61 on the limiting body 6 corresponds to the radial position of the first tab 51 from the pole set 3.
  • the portion of the first tab 51 located between the pole set 3 and the limiting body 6 generally extends vertically upward to maintain a firm connection with the wound pole piece;
  • the portion of the ear 51 that passes through the tab hole 6 and is connected to the cover 2 is bent to facilitate welding or other connection operations.
  • the limiting body 6 is placed on the upper end surface ⁇ of the pole set 3, and the positional relationship between the two is adjusted only by rotating the outer casing 1 or the limiting body 2, so that the polar ear hole 61 is exactly
  • the first tabs 51 extending vertically upward correspond to each other, and the limiting body 6 is fitted into the outer casing 1 and the first tabs 51 are smoothly passed through the tab holes 61.
  • the extending direction of the first tab 51 can be flexibly adjusted to smoothly pass through the pole hole 61.
  • the first tab 51 is generally an elongated metal foil having a width of about 3 mm, usually made of aluminum (A1) or aluminum alloy. One end of the first tab 51 is inserted into the pole set 3, and the other end is electrically connected to the cover 2. The first tab 51 is inserted into one end of the pole group 3 and is drawn from the pole piece which is laminated and wound in the pole group 3, and the tantalum is directly welded to the pole piece and then wound, so that the first tab 51 is also generally in the width direction. Bending deformation occurred.
  • the radial position of the tab hole 61 on the limiting body 6 and the first tab 51 can be self-contained.
  • the radial position of the pole group 3 correspondingly extends, which limits the shaking of the first tab 51 in the pole hole 61, further ensuring the stability of the battery structure.
  • the shape of the tab hole 61 can be set as an arc hole, which can accommodate the first tab 51, and the arc length is slightly larger than the width of the first tab 51, for example, set to about 4 mm, and the width is slightly larger than the first
  • the thickness of one of the tabs 51 further limits the movement of the first tab 51 to ensure a stable connection with the pole piece.
  • FIG. 4 Another structure of the limiting body is shown in FIG. 4.
  • the aperture of the tab hole 61 of the limiting body 6 is smaller than the diameter of the supporting column, and the first tab can pass upward through the pole hole 61, and the supporting column cannot be upward.
  • the tab holes 61 are pierced so as to be able to restrict the upward and downward movement of the support columns in the axial direction.
  • the pole hole may be a circular hole, a polygonal hole, or an irregularly shaped through hole.
  • FIG. 5 Another structure of the limiting body is shown in Fig. 5.
  • the pole hole 61 of the limiting body 6 is eccentric with the supporting column, and the axial movement of the supporting column can also be restricted.
  • a first projection of the polar ear hole in an axial plane of the vertical support column is located in a second projection of the support column on the plane, or a first projection and a second projection Only partially overlapping, or the first projection is completely separated from the second projection.
  • the limiting body can be flexibly arranged, and the limiting body can be directly placed on the upper end surface 41 of the supporting column to prevent it from moving up and down.
  • the manufacturing method of the cylindrical battery mainly includes the following steps:
  • the pole group 3 formed by laminating the positive and negative electrode sheets is wound into the outer casing 1, and the second lug 52 extending downward from the pole group 3 is fixed to the bottom of the outer casing 1, and the self-electrode group is The first tab 51 extending upward 3 maintains a vertically upward extending direction.
  • the support column 4 is placed in the middle of the pole group 3, and the laminated positive and negative electrode sheets are supported so as to be less likely to be deformed, and a structure as shown in Fig. 6 is obtained.
  • the stopper 6 is placed on the upper end surface of the pole group 3, and the first tab 51 is passed through the tab hole 61 to obtain the structure shown in Fig. 7.
  • This step can be accomplished by the following sub-steps: First, the limiting body 6 is aligned with the open end of the outer casing 1; then the relative rotation between the limiting body 6 and the outer casing 1 is performed, for example, the position of the limiting body 6 can be fixed. , the outer casing 1 is rotated about the axis (the pole set and the outer casing rotate synchronously); when the first lug 51 is rotated exactly to the position corresponding to the pole hole 6 1 , the first tab 51 can pass through the pole The ear hole 61 ⁇ stops rotating. The limiting body 6 is then mounted in the housing 1 such that the first tab 51 just passes through the tab hole 61.
  • the position of the first tab 51 and the tab hole 61 can be completely determined by the positioning detection, and the first tab 51 can be passed through the position of the tab hole 61, for example.
  • the photoelectric switch can be mounted on the limiting body 6.
  • the photoelectric switch detects The light sensing signal is then controlled to rotate by a fixed device or other control device, and is rotated to a position where the first tab 51 and the tab hole 61 completely correspond to each other, and the relative rotation is stopped. After the positioning detection is completed, the first tab 51 is passed through the tab hole 61 and the stopper 6 is fitted into the housing 1 to be fixed.
  • the groove 12 is rolled on the outer casing 3 by a roll groove process, and the groove 12 is disposed just above the mounting position of the limiting body 6, and the limiting body can be pressed downward. 6 is brought into close cooperation with the pole group 3 to obtain the structure shown in FIG.
  • the steps of manufacturing a cylindrical battery may be performed in the above order, or the order may be changed as appropriate.
  • the support column is first loaded into the pole group, and then the pole group is loaded into the outer casing.
  • the tab hole 61 may not be disposed at the center position of the limiting body 6, since the supporting post 4 is first placed in the pole set 3 and then the limiting body 6 is placed On the pole set 3, the pole holes 61 can thus be flexibly arranged.
  • the limiting body 6 of the present invention can prevent the support column 4 from moving up and down in the axial direction during battery assembly or use, which can avoid the looseness of the positive and negative electrode sheets stacked and wound in the pole group 3 due to lack of support, due to the positive
  • the looseness of the negative electrode sheet may result in an increase in the internal resistance of the battery, a decrease in the life span or even a failure of the battery.
  • the present invention effectively supports the pole piece formation of the cylindrical battery, significantly improves battery performance and work efficiency, and improves the battery. life.
  • the present invention can also prevent the support column 4 from moving upward to the first tab 51 connected between the cover 2 and the pole set 3 and the electrode cover, the printed circuit board, the temperature control device, and the insulation disposed inside the cover 2
  • the damage of components such as fillers eliminates the hidden dangers such as battery failure and short circuit that may be caused by this phenomenon, and further improves the working efficiency of the battery.

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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)
  • Connection Of Batteries Or Terminals (AREA)

Description

说明书
Title of Invention:圆柱形电池及其制造方法 技术领域
技术领域
[1] 本发明涉及一种圆柱形电池及其制造方法。
背景技术
背景技术
[2] 如图 1所示， 圆柱形电池一般包括圆筒状外壳 1、 设置在外壳 1内卷绕形成的极 组 3、 安装在外壳 1一端的盖板 2、 设置在极组 3中间的圆柱状钢芯 4及用于将盖板 2和极组 3绝缘隔开的绝缘板 6等部件。 但是， 该种圆柱形电池仍具有需要改进和 提高的地方。
对发明的公开
技术问题
[3] 本发明所要解决的技术问题是， 提供一种圆柱形电池及其制造方法。
技术解决方案
[4] 本发明解决其技术问题所釆用的技术方案是： 一种圆柱形电池， 包括外壳、 极 组、 支撑柱、 第一极耳及限位体， 极组设于外壳的内部， 极组具有在支撑柱的 轴向上延伸的轴孔， 支撑柱设于所述轴孔内， 第一极耳自极组引出， 限位体设 于外壳的内部并限制所述支撑柱在轴向上的移动。
[5] 限位体可以压在极组的上端面上， 限位体具有极耳孔， 第一极耳向上穿出所述 极耳孔。 限位体可以为绝缘体。
[6] 一种圆柱形电池， 包括外壳、 盖板、 极组、 支撑柱、 限位体、 第一极耳及第二 极耳， 外壳具有底部及顶部开口， 盖板固定在顶部开口， 极组位于外壳的内部 ， 极组的中部具有在支撑柱的轴向上延伸的轴孔， 支撑柱设于所述轴孔内， 限 位体定位在外壳的内部并压在极组的上端面上， 限位体具有极耳孔， 第一极耳 和第二极耳均自极组引出， 第一极耳向上穿过极耳孔并与盖板导接， 第二极耳 与外壳导接， 限位体将盖板和极组绝缘隔开， 且限位体限制支撑柱在轴向上的 移动。
[7] 极耳孔在垂直轴向的平面上的第一投影可以位于支撑柱在该平面上的第二投影 内， 或者第一投影与第二投影仅部分重叠， 或者第一投影与第二投影完全分开 。 具体的， 极耳孔的孔径可以小于支撑柱的直径； 或者是极耳孔与支撑柱在垂 直轴向的平面上的投影错位； 或者是极耳孔的形状为限制支撑柱轴向移动的不 规则形状。
[8] 极耳孔在限位体上的径向位置可以与第一极耳自极组弓 I出的径向位置相对应， 极耳孔可以为容纳第一极耳通过的弧形孔， 能够限制第一极耳在极耳孔内的晃 动， 保证电池结构的稳定性。
[9] 第一极耳位于所述极组和限位体之间的部分可以竖直向上延伸， 可以较佳的保 持第一极耳与所连的卷绕的极片之间稳固的连接。
[10] 限位体可以直接压在支撑柱的上端面， 可以进一步限制支撑柱的轴向移动。
[11] 限位体上可以设有用于找到所述第一极耳与所述极耳孔的完全对应的位置的定 位检测元件。
[12] 一种圆柱形电池的制造方法， 包括：
[13] 极组安装步骤， 将极组自圆柱形电池外壳的敞开端装入外壳的内部；
[14] 支撑柱安装步骤， 将支撑柱装入极组中部的轴孔；
[15] 限位体安装步骤， 将限位体放置在极组的上端面以限制支撑柱在轴向的移动， 并使自极组弓 I出的第一极耳穿过限位体上的极耳孔；
[16] 盖板安装步骤， 将盖板安装在外壳的敞开端， 并使外壳与盖板之间密封。
[17] 限位体安装步骤可以包括如下步骤：
[18] C1)将限位体对准外壳的敞开端；
[19] C2)使限位体与外壳之间进行相对转动， 至第一极耳能够穿过极耳孔吋停止转 动；
[20] C3)使第一极耳穿过极耳孔并将限位体装入外壳内部。
[21] 盖板安装步骤中， 安装盖板之前， 可以通过辊槽工艺在外壳上辊压形成凹槽， 使限位体卡在凹槽的下方。 有益效果
[22] 本发明的有益效果是： 限位体能够防止支撑柱在电池装配或使用过程中沿轴向 上下移动， 这样能够避免极组中层叠卷绕的正、 负极片由于缺少支撑而发生的 松动， 进而避免因正、 负极片的卷绕松动而可能导致的电池内阻增大， 寿命减 少甚至导致电池失效的问题， 显著提高了电池性能和工作效率， 提高了电池的 寿命。
附图说明
[23] 图 1为现有技术中圆柱形电池的剖视图；
[24] 图 2为本发明圆柱形电池的一种实施方式的剖视图；
[25] 图 3至图 5分别是本发明圆柱形电池的限位体的三种实施方式的立体图；
[26] 图 6为本发明圆柱形电池的制造方法的一种实施方式中将支撑柱放入极组中间 吋的剖视图；
[27] 图 7为本发明圆柱形电池的制造方法的一种实施方式中将限位体放置在极组上 端面的剖视图；
[28] 图 8为本发明圆柱形电池的制造方法的一种实施方式中辊槽工艺后的剖视图。
本发明的实施方式
[29] 实施方式一
[30] 如图 2所示， 圆柱形电池包括外壳 1、 极组 3、 支撑柱 4、 第一极耳 51及限位体 6 ， 极组 3设于外壳 1的内部， 极组 3具有在支撑柱 4的轴向上延伸的轴孔 31， 支撑 柱 4设于所述轴孔 31内， 第一极耳 51自极组 3引出， 限位体 6设于外壳 1的内部并 限制支撑柱 4在轴向上的移动。 通过限位体限制支撑柱的上、 下移动， 以免层叠 极组中卷绕的正、 负电极片发生松动造成电池的内阻增大， 从而影响电池的工 作效率和工作稳定性。
[31] 外壳 1一般由铝 （A1) 、 铁 （Fe) 或包含铝或铁的金属合金制成， 当然， 也可 以由其它导电并满足强度和使用要求的金属材料制成。
[32] 极组 3是圆柱形电池的核心部件， 极组 3可以为涂有正电极激活材料的正电极片 和涂有负电极激活材料的负电极片层叠卷绕而形成一个圆柱状卷绕体， 该卷绕 体中， 正电极片与负电极片之间还设有用于将两者相互隔开的绝缘层， 卷绕体 之间注有电解液。 极组 3可以与外壳 1同步转动。
[33] 支撑柱 4用于支撑极组 3， 支撑柱 4可以与轴孔 31紧配合。
[34] 第一极耳 51可以与极组 3的正极片相连， 也可以与极组 3的负极片相连。
[35] 限位体 6可以压在极组 3的上端面 32上， 该限位体 6可以具有极耳孔 61， 第一极 耳 51向上穿过该极耳孔 61。 第一极耳 51可以具有竖直部分 511和弯折部分 512， 该竖直部分 511可以位于限位体 6和极组 3之间， 该弯折部分 512可以位于限位体 6 的上方。
[36] 限位体 6可以是绝缘体， 即限位体同吋起到绝缘和限位的作用； 限位体也可仅 起到限位作用， 而由另设的元件起到绝缘的作用。
[37] 实施方式二
[38] 如图 2所示， 圆柱形电池包括外壳 1、 盖板 2、 极组 3、 支撑柱 4、 限位体 6、 第一 极耳 51及第二极耳 52。 外壳 1的底部封闭而形成封闭端 13， 外壳 1的顶部敞开而 形成敞开端 14。 盖板 2封闭外壳 1的敞开端 14。 极组 3安装在外壳 1的内部， 极组 3 的中部具有在支撑柱 4的轴向上延伸的轴孔 31， 支撑柱 4设于该轴孔 31内。 限位 体 6定位在外壳 1的内部并压在极组 3的上端面 32上， 限位体 6具有极耳孔 61， 第 一极耳 51和第二极耳 52均自极组 3引出， 第一极耳 51向上穿过极耳孔 61并与盖板 2电连接， 第二极耳 52与外壳 1的封闭端 13导接， 限位体 6将盖板 2和极组 3绝缘隔 开， 且限位体 6限制支撑柱 4在轴向上的移动。
[39] 盖板 2可以具有用于和电器的电极直接接触的电极盖， 还可以包括印刷电路板 、 温度控制装置、 绝缘填料等部件。
[40] 第一极耳 51和第二极耳 52分别自极组 3的上部、 下部延伸出， 并分别与极组的 正、 负极片相连。 第一极耳 51可以连接正极片而第二极耳 52连接负极片， 或者 是第一极耳可以连接负极片而第二极耳连接正极片。 第一极耳 51可以直接焊接 在盖板 2的电极片 21上， 实现第一极耳 51与盖板 2的电连接。 第二极耳 52可以直 接焊接在外壳 1的封闭端 13上， 实现第二极耳 52与外壳 1的电连接。
[41] 外壳 1的敞开端 14可以具有一个向内径向延伸的卷边 11， 该卷边 11用于将盖板 2 包合固定在外壳 1的内部。 外壳 1还可以具有一个辊压形成的凹槽 12， 该凹槽 12 设在盖板 2和极组 3之间并用于将盖板 2和极组 3隔开， 起到向上、 向下分别挤压 固定盖板 2、 极组 3位置的作用。 限位体 6可以卡在凹槽 12下方， 并将盖板 2和极 组 3绝缘隔开。
[42] 限位体 6可以全部由绝缘材料制成， 也可以仅部分由绝缘材料制成。
[43] 实施方式三
[44] 限位体的一种实施方式如图 2所示， 该限位体 6呈圆形片状结构， 压在极组 3的 上端面上并卡在外壳 1上的凹槽 12下， 将盖板 2和极组 3绝缘隔开， 该限位体 6不 仅能够阻止支撑柱 4沿轴向上、 下移动， 其上还设有可使第一极耳 51穿过的极耳 孔 61。 该极耳孔 61在限位体 6上的径向位置可与第一极耳 51自极组 3上引出的径 向位置相对应。 自极组 3向上引出吋， 该第一极耳 51位于极组 3与限位体 6之间的 部分通常向上竖直延伸以保持其与卷绕的极片之间稳固的连接； 第一极耳 51穿 过极耳孔 6并与盖板 2相连的部分才会发生弯折便于焊接或者其它连接方式的操 作。 在圆柱形电池制造过程中， 将限位体 6放置在极组 3的上端面吋， 只需通过 转动外壳 1或限位体 2调整好两者之间的位置关系， 使极耳孔 61正好与竖直向上 延伸的第一极耳 51相对应， 再将限位体 6装配在外壳 1内并使第一极耳 51顺利穿 过极耳孔 61。 为了达到限制支撑柱 4在极组 3中间上下移动的目的， 第一极耳 51 的延伸方向可以灵活调整以顺利穿过极耳孔 61。
[45] 实施方式四
[46] 限位体的另一种实施方式如图 2及图 3所示， 第一极耳 51—般都为长条形金属箔 ， 宽度大约为 3mm， 通常由铝 （A1) 或铝合金制成， 第一极耳 51的一端插入极 组 3， 另一端与盖板 2电连接。 第一极耳 51插入极组 3的一端自极组 3中层叠卷绕 的极片引出， 有吋直接焊接在极片上并随之被卷绕， 因此第一极耳 51通常也会 沿宽度方向发生弯曲变形。 为了使第一极耳 51顺利穿过限位体 6上的极耳孔 61并 与之形成更好的配合， 可使极耳孔 61在限位体 6上的径向位置与第一极耳 51自极 组 3上伸出的径向位置相对应， 限制了第一极耳 51在极耳孔 61内的晃动， 进一步 保障了电池结构的稳定性。 例如可将极耳孔 61的形状设置成弧形孔， 该弧形孔 能够容纳第一极耳 51， 其弧长略大于第一极耳 51的宽度， 例如设置成 4mm左右 ， 其宽度略大于第一极耳 51的厚度， 这样进一步限制了第一极耳 51的运动， 保 证其与极片之间的稳定连接。 [47] 实施方式五
[48] 限位体的又一种结构如图 4所示， 限位体 6的极耳孔 61的孔径小于支撑柱的直径 ， 第一极耳能够向上穿出极耳孔 61， 而支撑柱不能向上穿出极耳孔 61， 从而能 够限制支撑柱在轴向的上、 下移动。 该极耳孔可以为圆孔， 也可以为多边形孔 ， 或者不规则形状的通孔。
[49] 实施方式六
[50] 限位体的又一种结构如图 5所示， 限位体 6的极耳孔 61与支撑柱偏心， 也可以限 制支撑柱的轴向移动。
[51] 对于具有限位体的限位孔， 极耳孔在垂直支撑柱的轴向的平面上的第一投影位 于支撑柱在该平面上的第二投影内， 或者第一投影与第二投影仅部分重叠， 或 者第一投影与第二投影完全分开。 从限位支撑柱的目的出发， 限位体可以灵活 多样的设置， 也可以将限位体直接抵在支撑柱的上端面 41上来阻止其上下移动
[52] 圆柱形电池的制造方法主要包括以下步骤：
[53] 首先， 将由正、 负极片层叠卷绕而形成的极组 3装入外壳 1， 使自极组 3向下延 伸的第二极耳 52固定在外壳 1的底部， 并使自极组 3向上延伸的第一极耳 51保持 竖直向上的延伸方向。
[54] 接着， 将支撑柱 4装入极组 3中间， 对层叠卷绕的正、 负极片形成支撑， 使其不 易发生变形， 得到如图 6所示的结构。
[55] 接着， 将限位体 6放置在极组 3的上端面， 并使第一极耳 51穿过极耳孔 61， 得到 图 7所示的结构。
[56] 该步骤可通过以下子步骤完成： 首先， 限位体 6对准外壳 1的敞开端； 接着使限 位体 6与外壳 1之间进行相对转动， 例如可固定限位体 6的位置， 使外壳 1绕轴线 进行自转 (极组和外壳同步转动)； 当第一极耳 51随着外壳 1正好转动至与极耳孔 6 1完全对应的位置， 可使第一极耳 51穿过极耳孔 61吋停止转动。 接着将限位体 6 安装在外壳 1内， 此吋第一极耳 51刚好穿过极耳孔 61。 该步骤中， 为了更加迅速 、 准确地定位， 提高安装效率， 可通过定位检测找到第一极耳 51与极耳孔 61完 全对应、 并可使第一极耳 51穿过极耳孔 61的位置， 例如可通过光电开关进行检 测， 或釆用红外线检测、 超声波检测等方法。 光电开关可安装在限位体 6上， 限 位体 6与外壳 1之间相对转动过程中， 当第一极耳 51进入极耳孔 61在极组 3的上端 面的投影吋， 光电开关检测到光感应信号； 接着通过定吋器或其他控制装置控 制转动， 当转动至第一极耳 51与极耳孔 61完全对应的位置吋停止相对转动。 定 位检测完成后， 使第一极耳 51穿过极耳孔 61并将限位体 6装入外壳 1内固定。
[57] 固定好限位体 6之后， 通过辊槽工艺在外壳 3上辊压形成凹槽 12， 该凹槽 12正好 设置在限位体 6的安装位置上方， 可向下挤压限位体 6使之与极组 3形成紧密的配 合， 得到图 8所示的结构。
[58] 最后， 将第一极耳 51的自由端固定在盖板 2上， 向外壳 1内部注入电解液， 并将 盖板 2置于外壳 1的敞开端 （以上步骤的顺序视具体工艺而定） ， 再利用密封工 艺在外壳 1的敞开端形成卷边 11， 该卷边 11紧压盖板 2的边缘并将其包容在外壳 1 的内部形成良好的密封， 得到图 7所示的圆柱形电池。
[59] 对于制造圆柱形电池的各步骤， 可以按照上述顺序进行， 也可适当改变顺序， 如先将支撑柱装入极组， 再将极组装入外壳。
[60] 本发明的圆柱形电池的限位体 6中， 极耳孔 61可不设置在限位体 6的中心位置， 由于先将支撑柱 4放入极组 3内再将限位体 6放置在极组 3上， 因而极耳孔 61可以 灵活设置。 本发明的限位体 6能够防止支撑柱 4在电池装配或使用过程中沿轴向 上下移动， 这样能够避免极组 3中层叠卷绕的正、 负极片由于缺少支撑而发生的 松动， 由于正、 负极片的卷绕松动可能导致电池内阻增大， 寿命减少甚至导致 电池失效， 因此， 本发明对圆柱型电池的极片形成有效支撑， 显著提高了电池 性能和工作效率， 提高了电池的寿命。 另外， 本发明还能够避免支撑柱 4向上移 动对连接在盖板 2和极组 3之间的第一极耳 51以及设置在盖板 2内部的电极盖、 印 刷电路板、 温度控制装置、 绝缘填料等部件的损坏， 因此消除了该现象可能引 发的电池失效、 短路等隐患， 进一步提高了电池的工作效率。
[61] 以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明， 不能认 定本发明的具体实施只局限于这些说明。 对于本发明所属技术领域的普通技术 人员来说， 在不脱离本发明构思的前提下， 还可以做出若干简单推演或替换， 都应当视为属于本发明的保护范围。

Claims

权利要求书
一种圆柱形电池， 其特征在于： 包括外壳、 极组、 支撑柱、 第一 极耳及限位体， 所述极组设于所述外壳的内部， 所述极组具有在 所述支撑柱的轴向上延伸的轴孔， 所述支撑柱设于所述轴孔内， 所述第一极耳自所述极组引出， 所述限位体设于所述外壳的内部 并限制所述支撑柱在所述轴向上的移动。
根据权利要求 1所述的圆柱形电池， 其特征在于： 所述限位体压在 所述极组的上端面上， 所述限位体具有极耳孔， 所述第一极耳向 上穿出所述极耳孔。
根据权利要求 2所述的圆柱形电池， 其特征在于： 所述限位体为绝 缘体。
根据权利要求 3所述的圆柱形电池， 其特征在于： 所述极耳孔的孔 径小于所述支撑柱的直径；
根据权利要求 3所述的圆柱形电池， 其特征在于： 所述极耳孔与所 述支撑柱在垂直所述轴向的平面上的投影错位。
根据权利要求 3所述的圆柱形电池， 其特征在于： 所述极耳孔的形 状为限制所述支撑柱轴向移动的不规则形状。
根据权利要求 3所述的圆柱形电池， 其特征在于： 所述极耳孔在限 位体上的径向位置与所述第一极耳自极组弓 I出的径向位置相对应 根据权利要求 7所述的圆柱形电池， 其特征在于： 所述极耳孔为容 纳所述第一极耳通过的弧形孔。
根据权利要求 3所述的圆柱形电池， 其特征在于： 所述第一极耳位 于所述极组和限位体之间的部分竖直向上延伸。
一种圆柱形电池， 其特征在于： 包括外壳、 盖板、 极组、 支撑柱 、 限位体、 第一极耳及第二极耳， 所述外壳具有底部及顶部开口 ， 所述盖板固定在所述顶部开口， 所述极组位于所述外壳的内部 ， 所述极组的中部具有在支撑柱的轴向上延伸的轴孔， 所述支撑 柱设于所述轴孔内， 所述限位体定位在所述外壳的内部并压在所 述极组的上端面上， 所述限位体具有极耳孔， 所述第一极耳和第 二极耳均自所述极组引出， 所述第一极耳向上穿过所述极耳孔并 与所述盖板导接， 所述第二极耳与所述外壳导接， 所述限位体将 所述盖板和极组绝缘隔开， 且所述限位体限制所述支撑柱在所述 轴向上的移动。
根据权利要求 10所述的圆柱形电池， 其特征在于： 所述极耳孔在 垂直所述轴向的平面上的第一投影位于所述支撑柱在所述平面上 的第二投影内， 或者第一投影与第二投影仅部分重叠， 或者第一 投影与第二投影完全分开。
根据权利要求 11所述的圆柱形电池， 其特征在于： 所述极耳孔为 与所述第一极耳匹配的弧形孔。
根据权利要求 10所述的圆柱形电池， 其特征在于： 所述限位体直 接压在所述支撑柱的上端面。
根据权利要求 10所述的圆柱形电池， 其特征在于： 所述限位体上 设有用于找到所述第一极耳与所述极耳孔的完全对应的位置的定 位检测元件。
一种圆柱形电池的制造方法， 其特征在于： 包括：
极组安装步骤， 将极组自圆柱形电池外壳的敞开端装入所述外壳 的内部；
支撑柱安装步骤， 将支撑柱装入所述极组中部的轴孔； 限位体安装步骤， 将限位体放置在所述极组的上端面以限制所述 支撑柱在轴向的移动， 并使自极组弓 I出的第一极耳穿过所述限位 体上的极耳孔；
盖板安装步骤， 将盖板安装在所述外壳的敞开端， 并使外壳与盖 板之间密封。
根据权利要求 15所述的圆柱形电池的制造方法， 其特征在于： 所 述限位体安装步骤包括如下步骤： CI)将所述限位体对准所述外壳的敞开端；
C2)使所述限位体与外壳之间进行相对转动， 至所述第一极耳能够 穿过所述极耳孔吋停止转动；
C3)使所述第一极耳穿过所述极耳孔并将所述限位体装入外壳内部
[Claim 17] 根据权利要求 16所述的圆柱形电池的制造方法， 其特征在于： 所 述步骤 C2)中， 使所述限位体与外壳之间进行相对旋转吋， 固定所 述限位体， 并使所述外壳绕轴线进行自转。
[Claim 18] 根据权利要求 16或 17所述的圆柱形电池的制造方法， 其特征在于
： 通过定位检测找到所述第一极耳与所述极耳孔的完全对应的位 置。
[Claim 19] 根据权利要求 18所述的圆柱形电池的制造方法， 其特征在于： 釆 用光电开关检测所述第一极耳与所述极耳孔的完全对应的位置， 当所述第一极耳进入所述极耳孔在极组上端面上的投影内吋， 所 述光电开关检测到光感应信号， 控制所述限位体与外壳之间相对 转动， 当转动至所述第一极耳与所述极耳孔的完全对应的位置吋 停止转动。
[Claim 20] 根据权利要求 15所述的圆柱形电池的制造方法， 其特征在于： 所 述盖板安装步骤中， 安装所述盖板之前， 通过辊槽工艺在所述外 壳上辊压形成凹槽， 使所述限位体卡在所述凹槽的下方。
PCT/CN2009/075432 2009-05-08 2009-12-09 圆柱形电池及其制造方法 WO2010127542A1 (zh)

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CN106450089A (zh) * 2016-11-09 2017-02-22 安徽天鑫能源科技有限公司 一种无模组化电池包结构
US10651432B2 (en) 2015-04-13 2020-05-12 Cps Technology Holdings Llc Systems and methods for a reinforcement column within a module body

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US10651432B2 (en) 2015-04-13 2020-05-12 Cps Technology Holdings Llc Systems and methods for a reinforcement column within a module body
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CN106450089B (zh) * 2016-11-09 2023-02-28 安徽天鑫能源科技有限公司 一种无模组化电池包结构

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