WO2024255907A1 - 一种电芯 - Google Patents

一种电芯 Download PDF

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Publication number
WO2024255907A1
WO2024255907A1 PCT/CN2024/099620 CN2024099620W WO2024255907A1 WO 2024255907 A1 WO2024255907 A1 WO 2024255907A1 CN 2024099620 W CN2024099620 W CN 2024099620W WO 2024255907 A1 WO2024255907 A1 WO 2024255907A1
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WO
WIPO (PCT)
Prior art keywords
battery cell
welding
plate
along
state
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2024/099620
Other languages
English (en)
French (fr)
Inventor
贺孝武
舒宽金
黄金海
郑旭
安苏礼
王俊敏
何巍
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eve Power Co Ltd
Original Assignee
Eve Power Co Ltd
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
Application filed by Eve Power Co Ltd filed Critical Eve Power Co Ltd
Priority to EP24822854.6A priority Critical patent/EP4607684A4/en
Publication of WO2024255907A1 publication Critical patent/WO2024255907A1/zh
Priority to US19/026,815 priority patent/US20250158248A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
    • 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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • 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
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/514—Methods for interconnecting adjacent batteries or cells
    • H01M50/516—Methods for interconnecting adjacent batteries or cells by welding, soldering or brazing
    • 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

Definitions

  • the present application relates to the field of battery technology, and in particular to a battery cell.
  • pins are usually used to connect the tabs of the core package to the top cover or pole of the battery cell, so that the current of the core package can be extracted.
  • some battery cells include two core packages, and only one welding position is set on the pins, and the tabs of the two core packages are welded at the welding position.
  • the sum of the thickness of the tabs of the two core packages is large, the welding parameters are not easy to control, and the welding difficulty is relatively large; on the other hand, in order to ensure that the tabs of the two core packages can be led out to the welding position, the tab lengths of the two core packages need to be different, that is, two different core packages need to be produced.
  • the present application provides a battery cell, the pins of which can be conveniently connected to the tabs of two core packages, and there is no need to distinguish between different core packages during assembly, thereby reducing the difficulty of battery cell production and improving battery cell production efficiency.
  • a battery cell comprising:
  • Two core packages are arranged in parallel along a first direction, and pole ears are respectively provided at two ends of the core packages along a second direction;
  • the first connecting portion of the pin is connected to the top cover assembly, and the second connecting portion is formed with two welding plates.
  • the pole ears of the two core packages located at the same end are respectively fitted and connected with the two welding plates, that is, two independent welding positions are formed on the pin, and the pole ears of the two core packages can be welded separately, which reduces the welding difficulty; by limiting the distance d between the surfaces of the two welding plates facing away from each other along the first direction, it is ensured that when the two core packages have pole ears at the center along the first direction, the pole ears of the two core packages just correspond to and dock with the two welding plates of the pin, that is, the two core packages of the same battery cell can smoothly dock with the two welding plates of the pin when using exactly the same structure, thereby reducing the production difficulty of the battery cell and improving the production efficiency of the battery cell.
  • FIG1 is a schematic diagram of the structure of a battery cell provided in a specific embodiment of the present application.
  • FIG2 is an exploded view of a battery cell provided in a specific embodiment of the present application.
  • FIG. 3 is a schematic diagram of a battery cell provided in a specific embodiment of the present application when the second connection portion of the pin is in a first state;
  • FIG4 is a side view of a core package and pins provided in a specific embodiment of the present application.
  • FIG. 5 is a schematic diagram of a battery cell provided in a specific embodiment of the present application in a second state at a second connection portion of a pin;
  • FIG. 6 is a top view of the core package and pins provided in a specific embodiment of the present application.
  • Top cover assembly 11. Cover plate body; 12. Pole; 13. Insulator; 14. Press block;
  • connection should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements.
  • connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements.
  • the terms “upper”, “lower”, “right”, etc. are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application.
  • the terms “first” and “second” are only used to distinguish in the description and have no special meaning.
  • the present embodiment provides a battery cell, as shown in Figures 1 and 2, the battery cell includes a top cover assembly 1, a shell 4, two core packs 2 and two pins 3.
  • the shell 4 forms a box structure with one side open, the two core packs 2 are arranged in the shell 4, the two pins 3 are used to realize the electrical connection between the core pack 2 and the top cover assembly 1, and the top cover assembly 1 can be sealed at the opening of the shell 4, so that the battery cell forms a closed state.
  • a layer of insulating film is provided on the inner wall of the shell 4.
  • the top cover assembly 1 includes a cover body 11 and two poles 12, the two poles 12 are respectively a positive pole and a negative pole, and the two pins 3 are respectively connected to the two poles 12, so as to lead out the current of the core pack 2.
  • the top cover assembly 1 also includes an insulating member 13, and the insulating member 13 covers the inner and outer sides of the cover body 11. It can be understood that the top cover assembly 1 also includes a liquid injection structure, an explosion-proof structure, etc.
  • the two core packages 2 are arranged side by side along a first direction (i.e., the X direction in Figure 2), and each core package 2 includes two pole ears 21, and the two pole ears 21 of the core package 2 extend from the two ends of the core package 2 along the second direction (i.e., the Y direction in Figure 2).
  • the two pole ears 21 of the core package 2 are respectively a positive pole ear and a negative pole ear.
  • the positive pole ears of the two core packages 2 are located at the same end, and the negative pole ears of the two core packages 2 are located at the same end.
  • the two positive pole ears are connected to the positive pole column through a pin 3, and the two negative pole ears are connected to the negative pole column through another pin 3.
  • the plane where the pole ear 21 is located is perpendicular to the first direction.
  • the first direction is parallel to the narrow side of the four sides of the battery cell, specifically, it can be: the first direction is perpendicular to the wide side of the four sides of the battery cell; the second direction is parallel to the wide side of the four sides of the battery cell, specifically, it can be: the second direction is perpendicular to the narrow side of the four sides of the battery cell.
  • the pin 3 includes a first connection portion 31 and a second connection portion 32, wherein the first connection portion 31 is connected to the pole 12 of the top cover assembly 1, and the second connection portion 32 is used to connect to the two pole ears 21 located at the same end of the two core packs 2.
  • the top cover assembly 1 also includes two pressing blocks 14, a fastener, and the two pressing blocks 14 are respectively arranged corresponding to the two first connection portions 31, each pressing block 14 and the corresponding first connection portion 31 are respectively arranged on both sides of the cover body 11, and the first connection portion 31 is provided with a mounting hole 311, one end of the pole 12 is riveted or welded to the mounting hole 311, and the other end of the pole 12 is riveted or welded to the corresponding pressing block 14 after passing through the cover body 11.
  • the second connection portion 32 includes a connection plate 321 and two welding plates 322.
  • the connection plate 321 is connected to the first connection portion 31, and the two welding plates 322 are respectively connected to the connection plate 321.
  • the second connection portion 32 has a first state. In the first state, the two welding plates 322 are parallel and spaced apart, and the plane where the welding plates 322 are located is perpendicular to the first direction.
  • the two pole ears 21 at the same end of the two core packs 2 are respectively connected to the sides of the two welding plates 322 that are away from each other.
  • the distance between the surfaces of the two welding plates 322 that are away from each other along the first direction is d, and d satisfies the formula:
  • T is the thickness of the two core packages 2 along the first direction
  • b is the thickness of the tab 21 along the first direction.
  • the tab 21 is formed by stacking multiple layers of material.
  • the pole ear 21 in the first state of the pin 3, the pole ear 21 is arranged in parallel with the welding plate 322, and the pole ears 21 of the two core packages 2 located at the same end are respectively fitted and connected with the two welding plates 322, that is, two independent welding positions are formed on the pin 3, and the pole ears 21 of the two core packages 2 can be welded separately, which reduces the welding difficulty; by limiting the distance d between the surfaces of the two welding plates 322 facing away from each other along the first direction, it is ensured that when the two core packages 2 respectively have pole ears 21 at the center along the first direction, the pole ears 21 of the two core packages 2 just correspond to the two welding welds of the pin 3, that is, when the two core packages 2 of the same battery cell use exactly the same structure, they can be smoothly connected with the two welding plates 322 of the pin 3, thereby reducing the production difficulty of the battery cell and improving the production efficiency of the battery cell.
  • the pole tab 21 is welded to the corresponding welding plate 322 when the second connecting portion 32 is in the first state (i.e., the state shown in Fig. 3). In this state, the pole tab 21 is stably attached to the corresponding welding plate 322, which facilitates the welding operation.
  • the inner surface of the tab 21 i.e., the surface of one tab 21 facing the other tab 21
  • the outer surface of the corresponding welding plate 322 i.e., the surface of one welding plate 322 facing away from the other welding plate 322.
  • the 5 mm in formula (1) means that the welding plate 322 can be offset to the tab 21 close to the corresponding side within a certain range.
  • a certain extrusion force is generated between the welding plate 322 and the corresponding tab 21, thereby making the welding plate 322 and the tab 21 fit more closely, which not only improves the convenience of welding the two, but also improves the reliability of the connection between the two.
  • the electrode tab 21 connected to the welding plate 322 is a negative electrode tab
  • the distance d along the first direction between the surfaces of the two welding plates 322 facing away from each other satisfies:
  • the negative electrode ear is made of copper material, which has a relatively low hardness.
  • the margin in formula (2) is set to 3 mm for the negative electrode ear, which can prevent the welding plate 322 from being offset too much and causing the corresponding negative electrode ear to be deformed greatly, thereby preventing the negative electrode ear from being torn.
  • the electrode tab 21 connected to the welding plate 322 is a positive electrode tab
  • the distance d along the first direction between the surfaces of the two welding plates 322 facing away from each other satisfies:
  • the electrode tab 21 connected to the welding plate 322 is a negative electrode tab
  • the distance d along the first direction between the surfaces of the two welding plates 322 facing away from each other satisfies:
  • the second connection portion 32 of the pin 3 also has a second state, in which the two welding plates 322 and the connection plate 321 are arranged coplanarly and perpendicular to the second direction.
  • This arrangement makes the structure formed by the pin 3 and the core package 2 compact, and when it is installed in the housing 4, the volume of the entire battery cell is small, thereby increasing the energy density of the battery cell.
  • the second connection portion 32 can be switched from the first state to the second state by bending the welding plate 322 and the corresponding tab 21.
  • the connecting plate 321 and the two welding plates 322 are integrally formed by a plate. Before the pin 3 is connected to the tab 21, the pin 3 is placed in a first state by bending, and after the second connecting portion 32 is welded to the corresponding tab 21, the welding plate 322 is bent to the second state.
  • a fold 323 is provided between the welding plate 322 and the connecting plate 321, so that the bending of the welding plate 322 relative to the connecting plate 321 is easier to perform.
  • a process through hole 324 is provided at the fold 323, and the convenience of bending the welding plate 322 can be further improved by providing the process through hole 324.
  • the process through hole 324 is a long strip hole, and the process through hole 324 extends along the length direction of the fold 323.
  • the pin 3 connected to the negative electrode ear is made of copper material, which has a soft hardness, and the corresponding pin 3 can choose not to have a process through hole 324.
  • the pin 3 connected to the positive electrode ear is made of aluminum material, which has a hard hardness, and the corresponding pin 3 can choose to have a process through hole 324.
  • the dimension of the second connection portion 32 along the first direction is less than or equal to the thickness T of the two core packages 2 in the first direction. Therefore, when the core package 2 and the pins 3 are installed into the shell 4, the welding plate 322 will not scratch the insulating film inside the shell 4, thereby improving the safety of the battery cell.
  • the width of the welding plate 322 in the second direction is a, and a satisfies the formula:

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

提供一种电芯。所述电芯包括顶盖组件(1)、芯包(2)和引脚(3)，两个芯包(2)沿第一方向排列，芯包(2)沿第二方向的两端分别设置有极耳(21)，引脚(3)包括第一连接部(31)和第二连接部(32)，第一连接部(31)与顶盖组件(1)连接，第二连接部(32)包括两个间隔设置且垂直于第一方向的焊接板(322)，两个芯包(2)位于同一端的极耳(21)分别与两个焊接板(322)的相背侧贴合，两个焊接板(322)的相背的表面沿第一方向的距离为d。

Description

一种电芯
本申请要求在2023年6月16日提交中国专利局、申请号为202321545816.3的中国专利申请的优先权，以上申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域，具体涉及一种电芯。
 背景技术
在电芯中，通常采用引脚将芯包的极耳与电芯的顶盖或者极柱连接起来，从而使芯包的电流能够导出。相关技术中，一些电芯包括两个芯包，而引脚上仅设置有一个焊接位置，两个芯包的极耳均焊接在该焊接位置处。一方面，两个芯包的极耳厚度之和较大，焊接参数不易控制，焊接难度较大；另一方面，为了保证两个芯包的极耳均可以引出到该焊接位置，需要使两个芯包的极耳长度不同，也就是说需要生产两种不同的芯包。
 发明概述
在装配电芯时需要区分两种芯包，进而导致电芯的生产效率低。因此，亟待需要一种电芯来解决此技术问题。
本申请提供一种电芯，其引脚能够方便地实现与两个芯包的极耳连接，且组装时不需要区分不同的芯包，降低了电芯的生产难度，提高了电芯的生产效率。
本申请采用以下技术方案：
一种电芯，包括：
顶盖组件；
两个芯包，沿第一方向并列排布，所述芯包沿第二方向的两端分别设置有极耳；
引脚，包括第一连接部和第二连接部，所述第一连接部与所述顶盖组件连接，所述第二连接部包括连接板和两个分别与所述连接板连接的焊接板，所述第二连接部具有第一状态，在所述第一状态时，两个所述焊接板间隔设置且均垂直于所述第一方向，两个所述芯包位于同一端的两个所述极耳分别与两个所述焊接板背离彼此的一侧贴合连接，两个所述焊接板背离彼此的表面之间沿所述第一方向的距离为d，d满足公式：
；
其中，T为两个所述芯包沿所述第一方向的厚度，b为所述极耳沿所述第一方向的厚度。
有益效果
本申请的电芯，引脚的第一连接部与顶盖组件连接，第二连接部形成有两个焊接板，在第二连接部的第一状态，两个芯包位于同一端的极耳分别与两个焊接板贴合连接，即引脚上形成了两个独立的焊接位置，两个芯包的极耳可分别进行焊接，降低了焊接难度；通过对两个焊接板背离彼此的表面沿第一方向的距离d进行限定，保证了当两个芯包分别在沿第一方向的中心出极耳时，两个芯包的极耳刚好对应与引脚的两个焊接板对接，也就是说，同一个电芯的两个芯包在使用完全相同的结构时能够顺利实现与引脚的两个焊接板对接，从而降低了电芯的生产难度，提高了电芯的生产效率。
 附图说明
图1是本申请具体实施方式提供的电芯的结构示意图；
图2是本申请具体实施方式提供的电芯的爆炸图；
图3是本申请具体实施方式提供的电芯在引脚的第二连接部处于第一状态时的示意图；
图4是本申请具体实施方式提供的芯包和引脚的侧视图；
图5是本申请具体实施方式提供的电芯在引脚的第二连接部处于第二状态的示意图；
图6是本申请具体实施方式提供的芯包和引脚的俯视图。
图中：
1、顶盖组件；11、盖板本体；12、极柱；13、绝缘件；14、压块；
2、芯包；21、极耳；
3、引脚；31、第一连接部；311、安装孔；32、第二连接部；321、连接板；322、焊接板；323、折痕；324、工艺通孔；
4、外壳。
 本发明的实施方式
在本申请的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
在本实施例的描述中，术语“上”、“下”、“右”、等方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述和简化操作，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅仅用于在描述上加以区分，并没有特殊的含义。
本实施例提供了一种电芯，如图1和图2所示，电芯包括顶盖组件1、外壳4、两个芯包2和两个引脚3。外壳4形成一侧开口的箱体结构，两个芯包2设置在外壳4内，两个引脚3用于实现芯包2与顶盖组件1的电连接，顶盖组件1能够封堵在外壳4的开口处，从而使电芯形成封闭的状态。通常情况下，外壳4的内壁设置有一层绝缘膜。如图2所示，顶盖组件1包括盖板本体11和两个极柱12，两个极柱12分别为正极柱和负极柱，两个引脚3分别与两个极柱12连接，从而将芯包2的电流引出。顶盖组件1还包括绝缘件13，绝缘件13覆盖在盖板本体11的内侧和外侧。可以理解的是，顶盖组件1还包括注液结构、防爆结构等。
如图2和图3所示，两个芯包2沿第一方向(即图2中的X向)并列排布，每个芯包2包括两个极耳21，芯包2的两个极耳21分别自芯包2沿第二方向(即图2中的Y向)的两端伸出。可以理解的是，芯包2的两个极耳21分别为正极耳和负极耳。本实施例中，两个芯包2的正极耳位于同一端，两个芯包2的负极耳位于同一端。两个正极耳通过一个引脚3与正极柱连接，两个负极耳通过另一个引脚3与负极柱连接。本实施例中，如图2所示，在芯包2的初始状态下(即芯包2未与引脚3连接前)，极耳21所在的平面垂直于第一方向。
其中，第一方向平行于电芯的四个侧面中的窄面，具体地可为：第一方向垂直于电芯的四个侧面中的宽面；第二方向平行于电芯的四个侧面中的宽面，具体地可为：第二方向垂直于电芯的四个侧面中的窄面。
如图2和图3所示，引脚3包括第一连接部31和第二连接部32，其中第一连接部31与顶盖组件1的极柱12连接，第二连接部32用于与两个芯包2位于同一端的两个极耳21连接。本实施例中，如图2所示，顶盖组件1还包括两个压块14，紧固件，两个压块14分别与两个第一连接部31对应设置，每个压块14和对应的第一连接部31分别设置在盖板本体11的两侧，第一连接部31上设置有安装孔311，极柱12的一端铆接或焊接于安装孔311处，极柱12的另一端穿设盖板本体11后与对应的压块14铆接或焊接。
如图2和图3所示，第二连接部32包括连接板321和两个焊接板322，连接板321与第一连接部31连接，两个焊接板322分别与连接板321连接。第二连接部32具有第一状态，在第一状态下，两个焊接板322平行且间隔设置，且焊接板322所在的平面垂直于第一方向，两个芯包2位于同一端的两个极耳21分别与两个焊接板322背离彼此的一侧贴合连接。如图4所示，两个焊接板322背离彼此的表面之间沿第一方向的距离为d，d满足公式：
公式(1)。
其中，T为两个芯包2沿第一方向的厚度，b为极耳21沿第一方向的厚度。一些实施例中，极耳21由多层材料堆叠形成，对于这种情况，极耳21沿第一方向的厚度b＝mh，其中m为材料的层数，h为每层材料的厚度。
本实施例的电芯，在引脚3的第一状态下，极耳21与焊接板322平行设置，且两个芯包2位于同一端的极耳21分别与两个焊接板322贴合连接，即引脚3上形成了两个独立的焊接位置，两个芯包2的极耳21可分别进行焊接，降低了焊接难度；通过对两个焊接板322背离彼此的表面沿第一方向的距离d进行限定，保证了当两个芯包2分别在沿第一方向的中心出极耳21时，两个芯包2的极耳21刚好对应与引脚3的两个焊接焊对接，也就是说，同一个电芯的两个芯包2在使用完全相同的结构时，能够顺利实现与引脚3的两个焊接板322对接，从而降低了电芯的生产难度，提高了电芯的生产效率。
本实施例中，如图3所示，极耳21在第二连接部32处于第一状态(即图3所示状态)时与对应的焊接板322焊接连接。此状态下，极耳21与对应的焊接板322稳定贴合，便于进行焊接操作。
具体地，如图4所示，当时，表示极耳21的内侧表面(即一个极耳21朝向另一个极耳21的表面)刚刚好与对应的焊接板322的外侧表面(即一个焊接板322背离另一个焊接板322的表面)贴合。公式(1)中的5mm表示焊接板322可以在一定的范围内向靠近对应侧的极耳21偏移，此时，焊接板322与对应的极耳21之间产生一定的挤压力，进而使焊接板322与极耳21更为紧密地贴合，不仅提高两者焊接的便利性，还能提高两者连接的可靠性。
一些实施例中，若焊接板322连接的极耳21为负极耳，则两个焊接板322背离彼此的表面之间沿第一方向的距离d满足：
公式(2) 。
通常情况下，负极耳由铜材料制成，其硬度较小。本实施例中，对于负极耳将公式(2)中的余量设置为3mm，能够避免焊接板322偏移量过大而导致对应的负极耳发生较大的变形，进而避免负极耳被撕裂。
一些实施例中，若焊接板322连接的极耳21为正极耳，则两个焊接板322背离彼此的表面之间沿第一方向的距离d满足：
公式(3)。
通过将距离d设置在该范围内，既能保证正极耳准确与对应的焊接板322贴合并保持一定的压紧力，且不会造成正极耳变形量过大而撕裂。
一些实施例中，若焊接板322连接的极耳21为负极耳，则两个焊接板322背离彼此的表面之间沿第一方向的距离d满足：
公式(4)。
通过将距离d设置在该范围内，既能保证负极耳准确与对应的焊接板322贴合并保持一定的压紧力，且不会造成负极耳变形量过大而撕裂。
如图5所示，引脚3的第二连接部32还具有第二状态，在第二状态下，两个焊接板322与连接板321三者共面设置，且垂直于第二方向。这种设置使引脚3和芯包2形成的结构紧凑，当将其装入到外壳4内后，使整个电芯的体积较小，进而提高了电芯的能量密度。可选地，第二连接部32从第一状态切换至第二状态可以通过弯折焊接板322和对应的极耳21实现。
本实施例中，连接板321和两个焊接板322由一块板件一体成型。在引脚3连接极耳21之前，通过弯折的方式使引脚3处于第一状态，当第二连接部32与对应的极耳21焊接好后，再将焊接板322弯折至第二状态即可。
如图5所示，焊接板322与连接板321之间设置有折痕323，从而使焊接板322相对于连接板321的弯折更容易进行。一些实施例中，折痕323处设置有工艺通孔324，通过设置工艺通孔324可以进一步提高焊接板322弯折的便利性。可选地，工艺通孔324为长条状孔，且工艺通孔324沿折痕323的长度方向延伸。通常情况下，与负极耳连接的引脚3由铜材料制成，其硬度较软，则对应的引脚3可以选择不开设工艺通孔324。与正极耳连接的引脚3由铝材料制成，其硬度较硬，则对应的引脚3可以选择开设工艺通孔324。
如图5所示，在第二状态时，第二连接部32沿第一方向的尺寸小于或等于两个芯包2在第一方向的厚度T。从而在将芯包2和引脚3装入到外壳4的过程中，焊接板322不会划伤外壳4内部的绝缘膜，提高了电芯的安全性。
为了保证引脚3切换至第二状态后，第二连接部32沿第一方向的尺寸小于或等于T，则如图6所示，在第一状态时，焊接板322在第二方向的宽度为a，a满足公式：
d-2R+πR+2a＜T   公式(5)。
其中，R为焊接板322与连接板321之间形成的内圆角的半径，通过使引脚3在第一状态时满足公式(5)，则在将引脚3的第二连接部32切换至第二状态后，第二连接部32沿第一方向的尺寸小于T。

Claims (10)

  1. 一种电芯，包括：
    顶盖组件(1)；
    两个芯包(2)，沿第一方向并列排布，所述芯包(2)沿第二方向的两端分别设置有极耳(21)；
    引脚(3)，包括第一连接部(31)和第二连接部(32)，所述第一连接部(31)与所述顶盖组件(1)连接，所述第二连接部(32)包括连接板(321)和两个分别与所述连接板(321)连接的焊接板(322)，所述第二连接部(32)具有第一状态，在所述第一状态时，两个所述焊接板(322)间隔设置且均垂直于所述第一方向，两个所述芯包(2)位于同一端的两个所述极耳(21)分别与两个所述焊接板(322)背离彼此的一侧贴合连接，两个所述焊接板(322)背离彼此的表面之间沿所述第一方向的距离为d，d满足公式：
    ；
    其中，T为两个所述芯包(2)沿所述第一方向的厚度，b为所述极耳(21)沿所述第一方向的厚度。
  2. 如权利要求1所述的电芯，其中，所述极耳(21)在所述第二连接部(32)处于所述第一状态时与对应的所述焊接板(322)焊接连接。
  3. 如权利要求1所述的电芯，其中，若所述焊接板(322)连接的所述极耳(21)为负极耳，则两个所述焊接板(322)背离彼此的表面之间沿所述第一方向的距离d满足：
    。
  4. 如权利要求1所述的电芯，其中，若所述焊接板(322)连接的所述极耳(21)为正极耳，则两个所述焊接板(322)背离彼此的表面之间沿所述第一方向的距离d满足：
    ；
    和/或，若所述焊接板(322)连接的所述极耳(21)为负极耳，则两个所述焊接板(322)背离彼此的表面之间沿所述第一方向的距离d满足：
    。
  5. 如权利要求1-4任一项所述的电芯，其中，所述第二连接部(32)具有第二状态，在所述第二状态时，两个所述焊接板(322)与所述连接板(321)共面且垂直于所述第二方向。
  6. 如权利要求5所述的电芯，其中，在所述第二状态时，所述第二连接部(32)沿所述第一方向的尺寸小于或等于两个所述芯包(2)在所述第一方向的厚度T。
  7. 如权利要求5或6所述的电芯，其中，在所述第一状态时，所述焊接板(322)在所述第二方向的宽度为a，a满足公式：
    d-2R+πR+2a＜T；
    其中，R为所述焊接板(322)与所述连接板(321)之间形成的内圆角的半径。
  8. 如权利要求5-7任一项所述的电芯，其中，两个所述焊接板(322)与所述连接板(321)一体成型，所述焊接板(322)与所述连接板(321)之间设置有折痕(323)。
  9. 如权利要求8所述的电芯，其中，所述折痕(323)处设置有工艺通孔(324)。
  10. 如权利要求1-9任一项所述的电芯，其中，所述顶盖组件(1)包括盖板本体(11)和极柱(12)，所述极柱(12)穿设于所述盖板本体(11)并与所述第一连接部(31)连接。
PCT/CN2024/099620 2023-06-16 2024-06-17 一种电芯 Ceased WO2024255907A1 (zh)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016054022A (ja) * 2014-09-02 2016-04-14 株式会社豊田自動織機 蓄電装置
CN111106300A (zh) * 2019-01-30 2020-05-05 宁德时代新能源科技股份有限公司 电池单元电池模组
CN216648532U (zh) * 2021-10-12 2022-05-31 江苏正力新能电池技术有限公司 一种电池单元和电池模组
CN218548723U (zh) * 2022-11-02 2023-02-28 苏州清陶新能源科技有限公司 一种转接片及电池
CN218769982U (zh) * 2022-11-24 2023-03-28 湖北亿纬动力有限公司 一种电池引脚、电池盖板及电池
CN220291021U (zh) * 2023-06-16 2024-01-02 湖北亿纬动力有限公司 一种电芯

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111969166B (zh) * 2018-01-16 2022-11-29 宁德时代新能源科技股份有限公司 集流构件和电池
CN108199072B (zh) * 2018-01-16 2020-06-23 宁德时代新能源科技股份有限公司 充电电池
CN108198989B (zh) * 2018-01-16 2021-01-12 宁德时代新能源科技股份有限公司 连接构件和充电电池
CN208507745U (zh) * 2018-07-13 2019-02-15 宁德时代新能源科技股份有限公司 二次电池

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016054022A (ja) * 2014-09-02 2016-04-14 株式会社豊田自動織機 蓄電装置
CN111106300A (zh) * 2019-01-30 2020-05-05 宁德时代新能源科技股份有限公司 电池单元电池模组
CN216648532U (zh) * 2021-10-12 2022-05-31 江苏正力新能电池技术有限公司 一种电池单元和电池模组
CN218548723U (zh) * 2022-11-02 2023-02-28 苏州清陶新能源科技有限公司 一种转接片及电池
CN218769982U (zh) * 2022-11-24 2023-03-28 湖北亿纬动力有限公司 一种电池引脚、电池盖板及电池
CN220291021U (zh) * 2023-06-16 2024-01-02 湖北亿纬动力有限公司 一种电芯

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4607684A4

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