WO2019205640A1 - 用于电池的帽盖以及电池 - Google Patents

用于电池的帽盖以及电池 Download PDF

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Publication number
WO2019205640A1
WO2019205640A1 PCT/CN2018/119007 CN2018119007W WO2019205640A1 WO 2019205640 A1 WO2019205640 A1 WO 2019205640A1 CN 2018119007 W CN2018119007 W CN 2018119007W WO 2019205640 A1 WO2019205640 A1 WO 2019205640A1
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WO
WIPO (PCT)
Prior art keywords
battery
pole
cap
guide post
housing
Prior art date
Application number
PCT/CN2018/119007
Other languages
English (en)
French (fr)
Inventor
王生义
姬国庆
Original Assignee
广东微电新能源有限公司
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Filing date
Publication date
Application filed by 广东微电新能源有限公司 filed Critical 广东微电新能源有限公司
Publication of WO2019205640A1 publication Critical patent/WO2019205640A1/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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/567—Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
    • 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
    • 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 of a single cell or a single battery
    • H01M50/147—Lids or covers
    • 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
    • H01M50/30—Arrangements for facilitating escape of gases
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • 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 application relates to the field of energy storage devices, and more particularly, to a cap for a battery and a battery.
  • the battery typically includes a housing, a battery core, and a cap, the battery core being within the housing, and the cap being fixedly coupled to the housing.
  • the cap is electrically connected to the pole piece of the battery core.
  • the battery powers the electronic device or charges the battery through the cap.
  • the battery When the battery is in use, it may cause an increase in internal pressure due to aging or abnormal use.
  • the casing is inflated and even explodes, which has certain harm to the electronic device itself and the user.
  • One object of the present application is a new technical solution for a cap assembly of a battery.
  • a cap for a battery comprising a first pole guide pillar including a top guide pillar, a middle ring portion and a lower guide in order from top to bottom Column;
  • the end of the lower guide post is provided with a groove for clamping a current collector of the battery core, and the second pole plate is provided with a through hole, and the pressure relief assembly is disposed in the through hole.
  • a portion of the upper guide post connected to the middle ring portion is subjected to a stripping process to form a fracture portion.
  • a cap for a battery comprising a lower pillar and a second pole and an insulating ring connecting the lower pillar and the second pole; among them
  • the lower guide post is connected to a current collector of the battery core, the lower guide post is provided with a recessed hole, the second pole plate is provided with a through hole, and the pressure relief component is disposed in the through hole.
  • the pressure relief component is a sphere, and the sphere is disposed in the through hole, and the sphere forms an interference fit with the through hole.
  • the second pole plate includes a plane portion and an opening on the plane portion, and an annular sidewall portion extending downward from a plane portion of the opening edge, the annular sidewall portion and The insulating rings are connected.
  • a battery is provided.
  • the battery includes a housing, a battery core, and a cap as described above; the battery core is located in the housing, the cap is fixed at an opening of the housing, and an edge of the cap and the housing The joint forms a seal;
  • a first pole current collector of the cell is electrically coupled to the lower pillar, and a second pole current collector of the cell is electrically coupled to a bottom of the housing.
  • a gap is formed between an end of the lower guide post and a bottom of the housing, and a positive temperature coefficient thermistor is disposed in the gap.
  • a battery includes a housing, a battery core, and a cap, the battery core being located in a sealed cavity formed by the housing and the cap;
  • the cap includes a first pole guide post and a second pole disc, and an insulating ring connecting the first pole guide post and the second pole disc, the second pole disc including a flat portion and a plane An opening in the portion, and an annular sidewall portion extending downward from a planar portion of the edge of the opening, the annular sidewall portion being coupled to the insulating ring;
  • a U-shaped through hole is formed at a position of the bottom of the housing corresponding to the first pole guide post, and a pressure relief assembly is disposed in the U-shaped through hole.
  • the cap is joined to the housing by a welded connection.
  • the housing includes an insulating layer and a metal layer that are composited together, the insulating layer being located inside the metal layer.
  • One technical effect of the present application is that the battery having the cap can be made thinner and thinner.
  • FIG. 1 is an exploded view of a cap provided in a specific embodiment 1 of the present application.
  • FIG. 2 is a schematic view of a cap provided in a specific embodiment 1 of the present application.
  • Figure 3 is a cross-sectional view of the cap provided in the first embodiment of the present application.
  • Figure 5 is an exploded view of the cap provided in the second embodiment of the present application.
  • Figure 5 is a schematic view of a cap provided in a second embodiment of the present application.
  • FIG. 6 is an exploded view of a battery provided in Embodiment 3 of the present application.
  • FIG. 7 is a schematic diagram of a battery provided in Embodiment 3 of the present application.
  • Figure 8 is a cross-sectional view of a battery provided in a third embodiment of the present application.
  • Figure 9 is a cross-sectional view of a battery provided in a fourth embodiment of the present application.
  • the present application provides a cap for a battery, as shown in FIGS. 1-2, including a first pole guide post, a second pole disc 31, and an insulating ring 21.
  • the first pole guide column includes an upper guide post 11, a middle ring portion 12 and a lower guide post 13 in order from top to bottom.
  • the insulating ring 21 is located between the middle ring portion 12 and the second pole plate 31, and connects the two together.
  • the first is extremely positive and the second is extremely negative.
  • the battery cell of the battery can be formed by winding on the lower guide post 13, and by setting the shape of the lower guide post 13, the shape control of the battery core formed by winding can be realized.
  • the battery core is also cylindrical; when the lower guide post 13 is rectangular, the battery core is also rectangular.
  • the present application does not limit the shape of the lower guide post 13, and those skilled in the art can select as needed.
  • the arrangement of the upper guide post 11 facilitates the process of forming a battery cell by winding on the lower guide post 13.
  • the upper guide post 11 and the winder can be fastened and connected, so that the winder drives the whole guide pillar to rotate, thereby facilitating the winding formation of the electric core on the lower guide pillar 13 .
  • the upper guide post 11 can be a cylindrical body with a thread, so that the upper guide post 11 and the winder can be connected by a threaded structure, so that the upper guide post 11 and the winder can be easily loaded and unloaded.
  • the upper guide post 11 may also be a triangular prism or a rectangular body for a fastening connection between the upper guide post 11 and the winder.
  • Those skilled in the art can also select the upper guide post 11 of other shapes and structures, and the fastening manner between the upper guide post 11 and the winder. Any solution that can achieve the same technical effect belongs to the protection scope of the present application.
  • the first pole guide post and the second pole disc 31 are made of a metal material, and the metal material may be an alloy material of iron, stainless steel, nickel, titanium or the like; the insulating ring 21 material may be plastic, fiber, glass, Ceramic or its synthetic materials. This application does not limit the selection of these component materials.
  • first pole guide post and the second pole disc 31 are joined together by an insulating ring 21 by fitting or thermoforming.
  • the cap provided in the first embodiment of the present application is formed by winding a pole piece on the lower guide post 13 and finally winding to form a battery core, thereby avoiding the problem that the micro battery cannot be wound and formed because the width of the pole piece is too narrow.
  • the cell winding forming method enables the production of a battery having a smaller diameter and a thinner thickness.
  • the lower guide post 13 is provided with a recess 131 which can be used for inserting the current collector of the pole piece, thereby achieving electrical connection between the lower guide post 13 and the pole piece.
  • the width of the groove 131 is greater than or equal to 0.1 mm.
  • the second pole plate 31 is provided with a through hole 311, and the through hole 311 can be used for injecting an electrolyte.
  • the pressure relief component is further disposed on the through hole 311, so that when the internal pressure of the battery having the cap provided by the present application is too large, the internal pressure can be reduced through the pressure relief component on the through hole 311 in time. The effect of pressure is to prevent the battery from exploding due to internal pressure becoming large and even exploding.
  • the pressure relief component may be a ball 312 disposed in the through hole 311, and an interference fit is formed between the ball 312 and the through hole 311.
  • the ball 312 is jacked up for pressure relief.
  • the pressure relief assembly may also be provided with a nail in the through hole 311.
  • the nail may be jacked up for pressure relief.
  • the ball 312 and the nail may be made of steel, copper or the like, which is not limited in this application.
  • the portion where the upper guide post 11 is connected to the middle ring portion 12 is subjected to a blanking process to form the breaking portion 111.
  • the upper guide post 11 can be removed from the breaking portion 111.
  • one cross section of the breaking portion 111 is an inverted triangle, which reduces the connection area with the middle ring portion 12, so that the upper guide post 11 is easily removed from the middle ring portion 12.
  • the breaking portion 111 can also be other structures, such as an inverted cone, which is not limited in this application.
  • the second pole plate 31 includes a flat portion 313 and an opening on the flat portion 313, and an annular side wall portion 314 extending from the flat portion 313 of the opening edge toward the lower side of the cap.
  • the length of the extended annular side wall portion 314 is the same as or close to the thickness of the insulating ring 21. It is apparent that the thickness of the second pole 31 at the flat portion 313 is small, thereby increasing the space inside the battery, increasing the energy density per unit volume of the battery, and at the same time making the battery having the cap provided by the present application thinner and lighter.
  • the present application also provides a cap for a battery, as shown in FIGS. 3-4, including a lower guide post 13' and a second pole disc 31', and a lower guide post 13' and a second pole disc 31. 'Insulation ring 21' connected together.
  • the lower guide post 13' is for connection to a current collector of the cell.
  • a recessed hole 131' is provided in the lower guide post 13', and the opening of the recessed hole 131' faces the upper side of the cap.
  • the arrangement of the recessed holes 131' facilitates the winding of the cells on the lower guide post 13'.
  • the connecting member can be arranged to insert one end of the connecting member into the recessed hole 131', and the other end is fastened to the winding machine, thereby realizing the purpose of the winding machine driving the lower guide post 13' to rotate and wind the battery core, and also Quick connection and separation of the cap and the winder are achieved.
  • the inner side wall of the recessed hole 131' is provided with an internal thread, and the connecting member is screwed to the recessed hole 131'.
  • the recessed hole 131' may also have an inner hexagonal shape, and a connection member corresponding to the structure of the recessed hole 131' may be selected to realize the connection between the connecting member and the recessed hole 131', and the connecting member and the recessed hole 131 'The loading and unloading between the two is quicker.
  • the present application does not limit the specific mechanism of the recessed hole 131', and any solution that can achieve the same technical effect belongs to the protection scope of the present application.
  • the second pole plate 31' is provided with a through hole 311' which can be used for injecting an electrolyte. Further, a pressure relief assembly is further disposed on the through hole 311'.
  • the specific structure and components are the same as those of the first embodiment, and have the same technical effects, and are not described herein again.
  • the depth of the recessed hole 131' is smaller than the length of the lower pillar 13', and the groove is provided at the other end of the lower pillar 13', and the groove can be used for inserting the current collector of the pole piece, thereby realizing the lower pillar and the pole Electrical connection between the sheets.
  • the second pole plate 31' of the cap provided in the second embodiment of the present application also has the flat portion and the annular side wall portion in the first embodiment, and the specific structure and technical effects thereof are the same as those in the embodiment. This will not be repeated here.
  • the present application also provides a battery including a housing 40, a battery core 43 and a cap provided in the first embodiment or the second embodiment.
  • the battery core 43 is located in the housing 40, and the cap is fixed at the opening of the housing 40. And the edge of the cap forms a seal with the connection of the housing 40 such that the cell 43 is in a sealed cavity.
  • the first pole piece 41 of the battery cell 43 is electrically connected to the lower pillars 13, 13', and the second pole pole piece 42 is electrically connected to the bottom of the casing 40.
  • An upper insulating plate 51 is disposed between the battery core 43 and the cap, and a lower insulating plate 51 is disposed between the battery core 43 and the bottom of the housing 40.
  • the housing 40 includes an insulating layer and a metal layer that are laminated together, the insulating layer being located in the inner layer of the metal layer.
  • the arrangement of the insulating layer simplifies the assembly process of the battery with respect to the separated insulating layer and the outer casing, and the thickness of the insulating layer and the metal layer which are combined together can be made thinner, the space inside the battery casing is saved, and the battery unit is improved. The energy density of the volume.
  • a positive temperature coefficient thermistor is disposed between the lower pillar 13 and the bottom of the casing 40.
  • the resistance of the thermistor increases, so that the interior of the battery The impedance increases and protects the battery.
  • the current collector 411 of the first pole piece 41 is located in the groove 131 of the lower guide post 13 such that the first pole piece 41 and the lower guide post 13 are electrically connected. At the same time, the current collector does not need to occupy extra axial space outside the lower guide pillar 13, which increases the volume of the battery core and increases the capacity of the battery.
  • the caps provided in the first embodiment or the second embodiment of the present application are all connected to the housing 40 by welding.
  • the welding method is laser welding.
  • the welding machine technology is used to seal the cap between the cap and the casing 40, which avoids the extra occupation of the internal space of the battery by the conventional groove sealing, and increases the energy density per unit volume of the battery, so that the battery can be made lighter and thinner.
  • the present application also provides a battery including a housing 40", a battery core 43" and a cap 31" that is located within a sealed cavity formed by the housing 40" and the cap 31".
  • the cap 31" includes a first pole guide post 13" and a second pole disc 31", and an insulating ring connecting the first pole guide post 13" and the second pole disc 31" together. twenty one".
  • the second pole plate 31" includes a flat portion 313" and an opening on the flat portion 313", and an annular side wall portion 314 extending from the flat portion 313" of the opening edge toward the lower side of the cap"
  • the length of the extended annular side wall portion 314" is the same as or close to the thickness of the insulating ring 21".
  • the thickness of the second pole plate 31" at the flat portion 313" can be made thinner, thereby increasing the battery.
  • the inner space enhances the energy density per unit volume of the battery while making the battery having the cap provided by the present application lighter and thinner.
  • a U-shaped through hole 311 is formed at a position of the bottom of the housing 40 ′′ corresponding to the first pole guide post 13 ′′, and a pressure relief assembly is disposed in the U-shaped through hole 311 ′′.
  • the specific structure of the first pole guide post 13" may be the first pole guide pillar provided by the specific embodiment of the present application, or the lower guide pillar 13' provided by the second embodiment.
  • the first pole guide pillar 13 of the present application may be the first pole guide pillar provided by the specific embodiment of the present application, or the lower guide pillar 13' provided by the second embodiment.
  • the first pole guide pillar 13 of the present application is not limited, and any solution that can achieve the same technical effect belongs to the protection scope of the present application.
  • the pressure relief assembly may be a ball 312" disposed within the through hole 311", and an interference fit is formed between the ball 312" and the through hole 311".
  • the ball 312" is jacked up for pressure relief.
  • the pressure relief assembly may also be provided with a nail in the through hole 311", and when the internal pressure of the battery is too large, the top may be topped. The nail is released for pressure relief.
  • the ball 312" and the nail may be made of steel, copper or the like, which is not limited in this application. Those skilled in the art may also select other specific pressure relief components, and any solution that can achieve the same technical effect belongs to The scope of protection of this application.
  • the cap 31" and the housing 40" are joined together by welding.
  • the welding method is laser welding.
  • the sealing connection between the cap 31" and the casing 40" is carried out by using the welding machine technology, thereby avoiding the extra occupation of the internal space of the battery by the conventional groove sealing, thereby increasing the energy density per unit volume of the battery, so that the battery can be made more Light and thin.
  • the housing 40" includes an insulating layer and a metal layer which are laminated together, and the insulating layer is located in the inner layer of the metal layer.
  • the arrangement of the insulating layer simplifies the assembly process of the battery with respect to the separated insulating layer and the outer casing, and is compounded
  • the thickness of the insulating layer and the metal layer together can be made thinner, saving space in the battery casing, and further increasing the energy density per unit volume of the battery.

Abstract

本申请涉及用于电池的帽盖以及电池。该帽盖包括第一极导柱，所述第一极导柱从上到下依次包括有上导柱、中环部和下导柱；以及第二极盘和绝缘环，所述绝缘环将所述中环部与所述第二极盘连接在一起；其中所述下导柱的端部设置凹槽，所述第二极盘上设置有通孔，所述通孔上设置有泄压组件。本申请提供的用于电池的帽盖，能够使具有该帽盖的电池的制作的更加轻薄。

Description

用于电池的帽盖以及电池 技术领域
本申请涉及储能装置技术领域，更具体地，本申请涉及用于电池的帽盖以及电池。
背景技术
随着科技的进步，电子产品越来越趋于小型化，而电子产品中通常需要电池供电，因此电池的尺寸也被设计的越来越小。
电池通常包括外壳、电芯和帽盖，电芯在外壳内，帽盖与外壳固定连接。帽盖与电芯的极极片电连接。电池通过帽盖对电子设备进行供电或者对电芯进行充电。
电池在使用时，会因老化或者非正常的使用，而造成内部压强升高。使得外壳鼓胀，甚至出现爆炸的情况，对电子设备本身和用户都具有一定的危害。
申请内容
本申请的一个目的是用于电池的帽盖组件的新技术方案。
根据本申请的第一个方面，提供了一种用于电池的帽盖，包括第一极导柱，所述第一极导柱从上到下依次包括有上导柱、中环部和下导柱；以及
第二极盘和绝缘环，所述绝缘环将所述中环部与所述第二极盘连接在一起；其中
所述下导柱的端部设置用于卡接电芯的一个集流体的凹槽，所述第二极盘上设置有通孔，所述通孔内设置有泄压组件。
可选地，所述上导柱与所述中环部连接的部位做去料处理，以形成折断部。
根据本申请的第二个方面，提供了一种用于电池的帽盖，包括下导柱和第二极盘以及将所述下导柱与所述第二极盘连接在一起的绝缘环；其中
所述下导柱用于与电芯的一个集流体连接，所述下导柱内设置有凹陷孔，所述第二极盘上设置有通孔，所述通孔内设置有泄压组件。
可选地，所述泄压组件为球体，所述球体设置在所述通孔内，所述球体与所述通孔形成过盈配合。
可选地，所述第二极盘包括平面部和位于平面部上的开孔，以及从所述开孔边缘的平面部处向下延伸出的环形侧壁部，所述环形侧壁部与所述绝缘环连接。
根据本申请的第三个方面，提供了一种电池。该电池包括壳体、电芯以及上述的帽盖；所述电芯位于所述壳体内，所述帽盖固定在所述壳体的开口处，且所述帽盖的边缘与所述壳体的连接处形成密封；其中
所述电芯的第一极集流体与所述下导柱电连接，所述电芯的第二极集流体与所述壳体的底部电连接。
可选地，所述下导柱的端部与所述壳体底部之间具有间隙，所述间隙中设置有正温度系数热敏电阻。
根据本申请的第四个方面，提供了一种电池。该电池包括壳体、电芯以及帽盖，所述电芯位于所述壳体与帽盖形成的密封容腔内；
所述帽盖包括第一极导柱和第二极盘以及将所述第一极导柱与所述第二极盘连接在一起的绝缘环，所述第二极盘包括平面部和位于平面部上的开孔，以及从所述开孔边缘的平面部处向下延伸出的环形侧壁部，所述环形侧壁部与所述绝缘环连接；
所述壳体的底部与所述第一极导柱对应的位置处形成有U型通孔，所述U型通孔内设置有泄压组件。
可选地，所述帽盖与所述壳体通过焊接连接一起。
可选地，所述壳体包括复合在一起的绝缘层和金属层，所述绝缘层位于所述金属层的内侧。
本申请的一个技术效果在于，能够使具有该帽盖的电池的制作的更加轻薄。
通过以下参照附图对本申请的示例性实施例的详细描述，本申请的其它特征及其优点将会变得清楚。
附图说明
构成说明书的一部分的附图描述了本申请的实施例，并且连同说明书一起用于解释本申请的原理。
图1是本申请的具体实施例一提供的帽盖的爆炸图；
图2是本申请的具体实施例一提供的帽盖的示意图；
图3是本申请的具体实施例一提供的帽盖的剖视图；
图5是本申请的具体实施例二提供的帽盖的爆炸图；
图5是本申请的具体实施例二提供的帽盖的示意图；
图6是本申请的具体实施例三提供的电池的爆炸图；
图7是本申请的具体实施例三提供的电池的示意图；
图8是本申请的具体实施例三提供的电池的剖视图；
图9是本申请的具体实施例四提供的电池的剖视图。
具体实施方式
现在将参照附图来详细描述本申请的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本申请的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本申请及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术和设备可能不作详细讨论，但在适当情况下，所述技术和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步 讨论。
实施例一
本申请提供了一种用于电池的帽盖，如图1-2所示，包括有第一极导柱、第二极盘31和绝缘环21。其中，第一极导柱从上到下依次包括有上导柱11、中环部12和下导柱13，绝缘环21位于中环部12与第二极盘31之间，且将两者连接在一起。可选地，第一极为正极，第二极为负极。
电池的电芯可以通过在下导柱13上卷绕形成，通过设置下导柱13的形状，实现对卷绕形成的电芯的形状控制。例如下导柱13为圆柱形时，电芯也为圆柱形；下导柱13为矩形时，电芯也为矩形。本申请对下导柱13的形状不做限制，本领域技术人员可以根据需要进行选择。
上导柱11的设置，方便了在下导柱13上通过卷绕形成电芯的工艺。具体的，可以通过将上导柱11与卷绕机紧固连接，使卷绕机带动整个整机导柱进行旋转，从而方便下导柱13上电芯的卷绕形成。
其中，上导柱11可以为具有螺纹的圆柱体，使上导柱11与卷绕机可以通过螺纹架构进行连接，使得上导柱11与卷绕机之间方便装卸。可选地，所述上导柱11还可以为三棱柱或矩形主体，以便上导柱11与卷绕机之间的紧固连接。本领域技术人员还可以选择其他形状和结构的上导柱11，以及上导柱11与卷绕机之间的紧固方式，凡是能达到同样技术效果的方案，都属于本申请的保护范围。
具体的，第一极导柱和第二极盘31为金属材料制成，金属材料可以为铁，不锈钢，镍，钛或以上材料的合金材料；绝缘环21材料可以为塑料，纤维，玻璃，陶瓷或其合成材料。本申请对这些组件材料的选取不做限制。
可选地，第一极导柱和第二极盘31由绝缘环21通过装配或热成形的方式结合到一起。
本申请的实施例一提供的帽盖，通过在下导柱13上卷绕极片，最终卷绕形成电芯，避免了微型电池由于极片宽度太窄不能卷绕成型的问题，采用本申请提供的电芯卷绕成型方法，能够制作处直径更细和厚度更薄的电池。
进一步地，下导柱13上设置有凹槽131，凹槽131能够用于插入极片 的集流体，从而实现下导柱13与极片之间的电连接。可选地，凹槽131的宽度大于等于0.1mm。
如图1-2所示，第二极盘31上设置有通孔311，通孔311可以用来注射电解液。更进一步地，通孔311上还设置有泄压组件，能够使具有本申请提供的帽盖的电池内部压力过大时，能够及时通过通孔311上的泄压组件降低内部压力，起到泄压的作用，避免电池因内部压力变大而产生膨胀变形和甚至出现电池爆炸的情况。
可选地，如图2所示，泄压组件可以为设置在通孔311内的球312，球312与通孔311之间形成过盈配合。当电池内部气压达到预设值时，球312被顶起以进行泄压。可选地，泄压组件还可以设置在通孔311内的钉子，当电池内部压力过大时，可以顶起钉子进行泄压。其中，球312和钉子可以为钢、铜等材料制成，本申请对此不做限制。本领域技术人员还可以选择其他具体的泄压组件，凡是能达到同样技术效果的方案，都属于本申请的保护范围。
如图1-2所示，上导柱11与中环部12连接的部位做去料处理，以形成折断部111。待电芯缠绕完成后，如果不需要上导柱11，可以从折断部111将上导柱11移除。可选地，所述折断部111的一个截面呈倒三角形，减少了与中环部12的连接面积，使上导柱11容易从中环部12上移除。折断部111还可以为其他结构，例如倒锥形，本申请对此不做限制。
如图3所示，第二极盘31包括有平面部313和位于平面部313上的开孔，以及从开孔边缘的平面部313上向帽盖下侧延伸出的环形侧壁部314，延伸出的环形侧壁部314的长度与绝缘环21的厚度相同或接近。显然，第二极盘31在平面部313处的厚度较小，从而增大了电池内的空间，提升了电池单位体积的能量密度，同时能使具有本申请提供的帽盖的电池更加轻薄。
实施例二
本申请还提供了一种用于电池的帽盖，如图3-4所示，包括有下导柱13’和第二极盘31’，以及将下导柱13’和第二极盘31’连接在一起的 绝缘环21’。
下导柱13’用于与电芯的一个集流体连接。下导柱13’内设置有凹陷孔131’，凹陷孔131’的开口朝向帽盖的上侧。凹陷孔131’的设置，方便了下导柱13’上电芯的卷绕。可以通过设置连接件，使连接件的一端插入凹陷孔131’，另一端与卷绕机紧固连接，从而实现了卷绕机带动下导柱13’进行转动卷绕电芯的目的，同时也实现了帽盖与卷绕机快速的连接与分离。
可选地，凹陷孔131’内侧壁上设置有内螺纹，连接件与凹陷孔131’通过螺纹连接。可选地，凹陷孔131’还可以为内六角形形状，选取与凹陷孔131’结构对应的连接件，即可实现连接件与凹陷孔131’之间的连接，且连接件与凹陷孔131’之间的装卸比较快捷。本申请对凹陷孔131’的具体机构不做限制，凡是能达到同样技术效果的方案，都属于本申请的保护范围。
进一步地，第二极盘31’上设置有通孔311’，通孔311’可以用来注射电解液。更进一步地，通孔311’上还设置有泄压组件。其具体结构和组件与实施例一的方案一致，且具有同样的技术效果，在此不再赘述。
更进一步地，凹陷孔131’的深度小于下导柱13’的长度，在下导柱13’的另一端设置凹槽，凹槽能够用于插入极片的集流体，从而实现下导柱与极片之间的电连接。
优选地，本申请具体实施例二提供的帽盖的第二极盘31’也具有实施例一中的平面部和环形侧壁部，其具体结构和技术效果均与实施例一种相同，在此不再赘述。
实施例三
本申请还提供了一种电池，包括有壳体40、电芯43以及实施例一或实施例二提供的帽盖，电芯43位于壳体40内，帽盖固定在壳体40的开口处，且帽盖的边缘与壳体40的连接处形成密封，使电芯43处于一个密封的腔体内。电芯43的第一极极片41与下导柱13，13’电连接，第二极极片42与壳体40的底部电连接。
当帽盖装配到壳体40上后，下导柱13，13’与壳体40的底部之间具有一定距离的间隙，下导柱13，13’不会与壳体40的底部接触，避免了电池短路。
其中，电芯43与帽盖之间设置有上绝缘板51，电芯43与壳体40的底部之间设置有下绝缘板51。
可选地，壳体40包括复合在一起的绝缘层和金属层，绝缘层位于金属层的内层。绝缘层的设置，相对于分离的绝缘层和外壳简化了电池的装配工艺，且复合在一起的绝缘层和金属层厚度可以制作的更薄，节省了电池的壳体内的空间，提升了电池单位体积的能量密度。
如图5-7所示，在下导柱13与壳体40的底部之间设置有正温度系数热敏电阻，当电池短路温度升高时，热敏电阻的阻值增大，使得电池内部的阻抗增加，对电池起到保护作用。
进一步地，第一极极片41的集流体411位于下导柱13的凹槽131中，使的第一极极片41与下导柱13电连接。同时，集流体不需要占用下导柱13外额外的轴向空间，增大了电芯的体积，提高了电池的容量。
具体地，本申请的实施例一或实施例二提供的帽盖均与壳体40通过焊接连接在一起。可选地，焊接方式为激光焊接。采用焊机技术进行帽盖与壳体40之间的密封连接，避免了传统的滚槽封口对电池内部空间的额外占用，提升了电池单位体积的能量密度，使电池可以制作的更加轻薄。
实施例四
本申请还提供了一种电池，该电池包括有壳体40”、电芯43”和帽盖31”，电芯43”位于壳体40”与帽盖31”形成的密封容腔内。
如图9所示，帽盖31”包括有第一极导柱13”和第二极盘31”，以及将第一极导柱13”和和第二极盘31”连接在一起的绝缘环21”。其中，第二极盘31”包括有平面部313”和位于平面部313”上的开孔，以及从开孔边缘的平面部313”上向帽盖下侧延伸出的环形侧壁部314”，延伸出的环形侧壁部314”的长度与绝缘环21”的厚度相同或接近。显然，第二极盘31”在平面部313”处的厚度可以制作的更薄，从而增大了电池内的 空间，提升了电池单位体积的能量密度，同时能使具有本申请提供的帽盖的电池更加轻薄。
进一步地，壳体40”的底部与第一极导柱13”对应的位置处形成有U型通孔311”，U型通孔311”内设置有泄压组件。
可选地，第一极导柱13”的具体结构可以为本申请具体实施例提供的第一极导柱，或者为实施二提供的下导柱13’。本申请对第一极导柱13”的具体结构不做限制，凡是能达到同样技术效果的方案，都属于本申请的保护范围。
可选地，如图9所示，泄压组件可以为设置在通孔311”内的球312”，球312”与通孔311”之间形成过盈配合。当电池内部气压达到预设值时，球312”被顶起以进行泄压。可选地，泄压组件还可以设置在通孔311”内的钉子，当电池内部压力过大时，可以顶起钉子进行泄压。其中，球312”和钉子可以为钢、铜等材料制成，本申请对此不做限制。本领域技术人员还可以选择其他具体的泄压组件，凡是能达到同样技术效果的方案，都属于本申请的保护范围。
可选地，帽盖31”与与壳体40”通过焊接连接在一起。可选地，焊接方式为激光焊接。采用焊机技术进行帽盖31”与壳体40”之间的密封连接，避免了传统的滚槽封口对电池内部空间的额外占用，提升了电池单位体积的能量密度，使电池可以制作的更加轻薄。
可选地，壳体40”包括复合在一起的绝缘层和金属层，绝缘层位于金属层的内层。绝缘层的设置，相对于分离的绝缘层和外壳简化了电池的装配工艺，且复合在一起的绝缘层和金属层厚度可以制作的更薄，节省了电池的壳体内的空间，能够进一步提升电池单位体积的能量密度。
虽然已经通过示例对本申请的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上示例仅是为了进行说明，而不是为了限制本申请的范围。本领域的技术人员应该理解，可在不脱离本申请的范围和精神的情况下，对以上实施例进行修改。本申请的范围由所附权利要求来限定。

Claims (10)

  1. 一种用于电池的帽盖，其特征在于，包括第一极导柱，所述第一极导柱从上到下依次包括有上导柱、中环部和下导柱；以及
    第二极盘和绝缘环，所述绝缘环将所述中环部与所述第二极盘连接在一起；其中
    所述下导柱的端部设置用于卡接电芯的一个集流体的凹槽，所述第二极盘上设置有通孔，所述通孔内设置有泄压组件。
  2. 根据权利要求1所述的帽盖，其特征在于，所述上导柱与所述中环部连接的部位做去料处理，以形成折断部。
  3. 一种用于电池的帽盖，其特征在于，包括下导柱和第二极盘以及将所述下导柱与所述第二极盘连接在一起的绝缘环；其中
    所述下导柱用于与电芯的一个集流体连接，所述下导柱内设置有凹陷孔，所述第二极盘上设置有通孔，所述通孔内设置有泄压组件。
  4. 根据权利要求1或3所述的帽盖，其特征在于，所述泄压组件为球体，所述球体设置在所述通孔内，所述球体与所述通孔形成过盈配合。
  5. 根据权利要求1或3所述的帽盖，其特征在于，所述第二极盘包括平面部和位于平面部上的开孔，以及从所述开孔边缘的平面部处向下延伸出的环形侧壁部，所述环形侧壁部与所述绝缘环连接。
  6. 一种电池，其特征在于，包括壳体、电芯以及权利要求1-5任意一项所述的帽盖；所述电芯位于所述壳体内，所述帽盖固定在所述壳体的开口处，且所述帽盖的边缘与所述壳体的连接处形成密封；其中
    所述电芯的第一极集流体与所述下导柱电连接，所述电芯的第二极集流体与所述壳体的底部电连接。
  7. 根据权利要求6所述的电池，其特征在于，所述下导柱的端部与所述壳体底部之间具有间隙，所述间隙中设置有正温度系数热敏电阻。
  8. 一种电池，其特征在于，包括壳体、电芯以及帽盖，所述电芯位于所述壳体与帽盖形成的密封容腔内；
    所述帽盖包括第一极导柱和第二极盘以及将所述第一极导柱与所述第二极盘连接在一起的绝缘环，所述第二极盘包括平面部和位于平面部上的开孔，以及从所述开孔边缘的平面部处向下延伸出的环形侧壁部，所述环形侧壁部与所述绝缘环连接；
    所述壳体的底部与所述第一极导柱对应的位置处形成有U型通孔，所述U型通孔内设置有泄压组件。
  9. 根据权利要求6或8所述的电池，其特征在于，所述帽盖与所述壳体通过焊接连接一起。
  10. 根据权利要求6或8所述的电池，其特征在于，所述壳体包括复合在一起的绝缘层和金属层，所述绝缘层位于所述金属层的内侧。
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CN113848218B (zh) * 2021-09-22 2023-11-14 南方科技大学 电芯的原位测试模具及对电芯进行中子测试的方法
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