WO2022242538A1 - 集流盘及电池 - Google Patents

集流盘及电池 Download PDF

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Publication number
WO2022242538A1
WO2022242538A1 PCT/CN2022/092418 CN2022092418W WO2022242538A1 WO 2022242538 A1 WO2022242538 A1 WO 2022242538A1 CN 2022092418 W CN2022092418 W CN 2022092418W WO 2022242538 A1 WO2022242538 A1 WO 2022242538A1
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WIPO (PCT)
Prior art keywords
welding
plate
end surface
supporting legs
battery
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PCT/CN2022/092418
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English (en)
French (fr)
Inventor
黄利明
岳亮亮
刘静
徐悦斌
何巍
Original Assignee
湖北亿纬动力有限公司
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Application filed by 湖北亿纬动力有限公司 filed Critical 湖北亿纬动力有限公司
Priority to EP22803860.0A priority Critical patent/EP4160755A4/en
Priority to US18/008,394 priority patent/US20240234969A1/en
Publication of WO2022242538A1 publication Critical patent/WO2022242538A1/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
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • 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
    • H01M50/528—Fixed electrical connections, i.e. not intended for disconnection
    • 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
    • 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 batteries, for example, to a collector plate and a battery provided with the collector plate.
  • the collector plate is one of the important parts of the battery, and the collector plate is configured to electrically connect the cells of the battery with the positive or negative terminals of the battery.
  • the technical problem of the current collecting plate is: the current collecting plate includes the welding plate and the tab. One end surface of the welding plate is welded and fixed to the end surface of the battery cell. The tab is used to connect with the terminal.
  • the tab Bending treatment there is a risk of damage to the tab during the bending process; the tab and the welding pad are generally connected by welding, and the internal resistance of the connection of the tab is too high, which cannot meet the requirements of high-rate charge and discharge of the battery; in order to make the battery For high-rate charge and discharge, it is necessary to increase the thickness of the tabs, but too thick tabs are not easy to bend and are not conducive to battery packaging.
  • the present application provides a current collecting plate and a battery, and the current collecting plate can meet the requirement of high-rate charging and discharging of the battery.
  • the present application provides a current collecting plate, including: a welding plate, and a plurality of supporting feet connected to the welding plate.
  • the welding pad is provided with a plurality of through holes, the through holes vertically penetrate the upper end surface and the lower end surface of the welding pad, and the orientation of the end surface of the supporting legs away from the welding pad is the same as the orientation of the lower end surface of the welding pad.
  • the present application also provides a battery, which is provided with the above-mentioned current collecting plate.
  • Fig. 1 is a schematic structural diagram of a collector plate provided by an embodiment of the present application.
  • first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features.
  • a feature defined as “first” or “second” may explicitly or implicitly include one or more of said features.
  • “plurality” means two or more, unless otherwise defined.
  • 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, a direct connection, or an indirect connection through an intermediary. It can be an internal communication between two elements or an interaction relationship between two elements.
  • a first feature being "on” or “under” a second feature may include that the first and second features are in direct contact, and may also include that the first and second features are not in direct contact. contact but through additional feature contact between them.
  • “above”, “above” and “above” the first feature on the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.
  • "Below”, “below” and “under” the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is less horizontal than the second feature.
  • An embodiment of the present application provides a current collecting plate, including: a welding plate, and a plurality of supporting legs connected to the welding plate.
  • the welding pad is provided with a plurality of through holes, the through holes vertically penetrate the upper end surface and the lower end surface of the welding pad, and the orientation of the end surface of the supporting legs away from the welding pad is the same as the orientation of the lower end surface of the welding pad.
  • the upper end surface of the welding pad is connected and fixed to the negative end surface of the cell, and the end surface of the supporting leg away from the welding pad is connected and fixed to the negative terminal.
  • the angle range of the inner angle between the supporting leg and the welding pad is 90°-135°.
  • the supporting feet are arranged vertically.
  • the supporting legs are connected to the lower end surface of the welding pad.
  • a plurality of arc-shaped protrusions are provided on the side wall of the welding pad, and the vertically arranged supporting legs are connected with the arc-shaped protrusions.
  • both the arc-shaped protrusions and the supporting feet are distributed around the central axis of the welding plate in the circumferential direction, and there are gaps between adjacent supporting feet.
  • the number of arc-shaped protrusions and the number of supporting legs are both four.
  • connection between the support leg and the welding pad is fixed by welding.
  • the supporting legs are integrated with the welding pad.
  • a current collecting plate of a new structure provided by an embodiment of the present application includes: a welding plate 1 , and four supporting legs 2 connected to the welding plate 1 .
  • the welding pad 1 is provided with five through holes 11, and the through holes 11 vertically run through the upper end surface and the lower end surface of the welding pad 1; by providing the through holes 11 on the welding pad 1, the electrolyte can flow into the Inside the battery and in contact with the cells.
  • the upper end surface of the welding pad 1 is set to be welded and fixed with the end surface of the cell electrode.
  • the supporting feet 2 are arranged vertically, and the end surface of the supporting feet 2 away from the welding pad 1 is a plane, and the orientation of the plane is the same as that of the lower end surface of the welding pad 1, and the plane is set to be welded and fixed with the electrode terminals of the battery.
  • the four supporting feet 2 are distributed around the central axis of the welding disc 1 in the circumferential direction, and there are gaps between adjacent supporting feet 2 .
  • the circumferential side of the welding plate 1 is provided with a concave part between two adjacent arc-shaped protrusions 12.
  • the setting of the concave part can prevent the part of the current collector plate from contacting the battery case due to the problem of processing accuracy.
  • the body interferes and deforms, which in turn may cause damage to the separator, thereby improving the safety of the battery.
  • the power battery adopts the current collecting plate provided by this embodiment, which can reduce the internal resistance of the battery and meet the requirements of high-rate charge and discharge.
  • the supporting legs function as tabs in the current collecting tray, but the supporting legs do not need to be bent, so the thickness of the supporting legs can be increased.
  • the welding pad can be connected to multiple supporting legs, thereby increasing the overcurrent area between the welding pad and the negative terminal of the battery, that is, improving the overcurrent capacity of the current collecting plate, so that the battery equipped with the current collecting plate can adapt to high-rate charging. put.
  • the embodiment of the present application also provides a battery, the battery is provided with the above-mentioned current collecting plate.

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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

本文公开一种集流盘，包括焊接盘，以及和焊接盘连接的多个支撑脚；焊接盘上设置有多个通孔，通孔竖直贯穿焊接盘的上端面和下端面，支撑脚远离焊接盘的端面的朝向和焊接盘的下端面的朝向相同。本文还公开一种电池，该电池设置有上述的集流盘。

Description

集流盘及电池
本申请要求在2021年05月21日提交中国专利局、申请号为202121112734.0的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池领域，例如涉及一种集流盘和设置有该集流盘的电池。
背景技术
集流盘是电池的重要部件之一，集流盘设置为将电池的电芯和电池的正极或负极端子电性连接。集流盘存在的技术问题为：集流盘包括焊接盘和极耳，焊接盘的一端面和电芯端面焊接固定，极耳用来和端子连接，由于电池内部空间有限，因此会对极耳进行弯折处理，极耳在弯折的过程有损坏的风险；极耳与焊接盘一般采用焊接连接，极耳的连接内阻偏高，无法满足电池高倍率充放电的要求；为了使电池能进行高倍率充放电，需要增大极耳的厚度，但是太厚的极耳不易折弯而且不利于电池的封装。
发明内容
本申请提供一种集流盘及电池，该集流盘能满足电池高倍率充放电的要求。
本申请提供一种集流盘，包括：焊接盘，以及和焊接盘连接的多个支撑脚。焊接盘上设置有多个通孔，通孔竖直贯穿焊接盘的上端面和下端面，支撑脚远离焊接盘的端面的朝向和焊接盘的下端面的朝向相同。
本申请还提供一种电池，该电池设置有上述的集流盘。
附图说明
图1为本申请一实施例提供的一种集流盘的结构示意图。
其中：1、焊接盘；11、通孔；12、弧形凸起；2、支撑脚。
具体实施方式
此处所描述的具体实施例仅仅用以解释本申请。
在本申请的描述中，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针” 等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，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”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有限定。
在本申请的描述中，除非另有规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，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，可以根据情况理解上述术语在本申请中的含义。
在本申请中，除非另有规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度小于第二特征。
本申请实施例提供一种集流盘，包括：焊接盘，以及和焊接盘连接的多个支撑脚。焊接盘上设置有多个通孔，通孔竖直贯穿焊接盘的上端面和下端面，支撑脚远离焊接盘的端面的朝向和焊接盘的下端面的朝向相同。
焊接盘的上端面与电芯负极端面连接固定，支撑脚远离焊接盘的端面和负极端子连接固定。
一实施例中，支撑脚和焊接盘之间的内角的角度范围为90°～135°。
一实施例中，支撑脚竖直设置。
一实施例中，支撑脚与焊接盘的下端面连接。
一实施例中，焊接盘的侧壁上设置有多个弧形凸起，竖直设置的支撑脚和弧形凸起连接。
一实施例中，弧形凸起和支撑脚均绕焊接盘的中轴线周向均为分布，相邻的支撑脚之间存在间隙。
一实施例中，弧形凸起的数目和支撑脚的数目均为四个。
一实施例中，支撑脚与焊接盘的连接处为焊接固定。
一实施例中，支撑脚与焊接盘一体设置。
如图1中所示，本申请一实施例提供的一种新型结构的集流盘，包括：焊接盘1，以及和焊接盘1连接的四个支撑脚2。焊接盘1上设置有五个通孔11，通孔11竖直贯穿焊接盘1的上端面和下端面；通过在焊接盘1上设置有通孔11，使得电解液能够通过通孔11流入到电池内部并与电芯接触。焊接盘1的上端面设置为与电芯电极端面焊接固定。焊接盘1的侧壁上设置有四个弧形凸起12，四个弧形凸起12绕焊接盘1的中轴线周向均为分布，四个支撑脚2分别和四个弧形凸起12连接。支撑脚2为竖直设置，支撑脚2远离焊接盘1的端面为平面，该平面的朝向和焊接盘1的下端面的朝向相同，该平面设置为和电池的电极端子焊接固定。
四个支撑脚2绕焊接盘1的中轴线周向均为分布，相邻的支撑脚2之间存在间隙。
焊接盘1的周向侧面在相邻的两个弧形凸起12之间设置有凹陷部，凹陷部的设置能够防止集流盘因加工精度的问题导致支撑脚2之外的部分与电池壳体发生干涉而变形，进而可能会对隔膜等造成损伤，从而提高了电池的安全性。
动力电池采用本实施例提供的集流盘，能够降低电池内阻，并且能满足高倍率充放电的要求。
本申请中支撑脚起到了集流盘中的极耳的作用，但支撑脚不需要进行弯折处理，因此可以增大支撑脚的厚度。焊接盘可以连接多个支撑脚，从而增加了焊接盘与电池负极端子间的过流面积，也即提升了该集流盘的过流能力，使得配置该集流盘的电池能够适应大倍率充放。
本申请实施例还提供一种电池，该电池设置有上述的集流盘。
以上所述实施例的多个技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的多个技术特征所有可能的组合都进行描述。

Claims (16)

  1. 一种集流盘，包括焊接盘，以及和所述焊接盘连接的多个支撑脚；所述焊接盘上设置有多个通孔，所述通孔竖直贯穿所述焊接盘的上端面和下端面，所述支撑脚远离焊接盘的端面的朝向和所述焊接盘的下端面的朝向相同。
  2. 根据权利要求1所述的集流盘，其中，所述支撑脚与所述焊接盘的连接处为焊接固定。
  3. 根据权利要求1所述的集流盘，其中，所述支撑脚与所述焊接盘一体设置。
  4. 根据权利要求1所述的集流盘，其中，所述支撑脚竖直设置。
  5. 根据权利要求4所述的集流盘，其中，所述支撑脚与所述焊接盘的下端面连接。
  6. 根据权利要求4所述的集流盘，其中，所述焊接盘的侧壁上设置有多个弧形凸起，所述支撑脚和所述弧形凸起连接。
  7. 根据权利要求6所述的集流盘，其中，所述弧形凸起和所述支撑脚均绕所述焊接盘的中轴线周向均为分布，相邻的支撑脚之间存在间隙。
  8. 根据权利要求7所述的集流盘，其中，所述弧形凸起的数目和所述支撑脚的数目均为四个。
  9. 一种电池，设置有集流盘；
    所述集流盘，包括焊接盘，以及和所述焊接盘连接的多个支撑脚；所述焊接盘上设置有多个通孔，所述通孔竖直贯穿所述焊接盘的上端面和下端面，所述支撑脚远离焊接盘的端面的朝向和所述焊接盘的下端面的朝向相同。
  10. 根据权利要求9所述的电池，其中，所述支撑脚与所述焊接盘的连接处为焊接固定。
  11. 根据权利要求9所述的电池，其中，所述支撑脚与所述焊接盘一体设置。
  12. 根据权利要求9所述的电池，其中，所述支撑脚竖直设置。
  13. 根据权利要求12所述的电池，其中，所述支撑脚与所述焊接盘的下端面连接。
  14. 根据权利要求12所述的电池，其中，所述焊接盘的侧壁上设置有多个弧形凸起，所述支撑脚和所述弧形凸起连接。
  15. 根据权利要求14所述的电池，其中，所述弧形凸起和所述支撑脚均绕所述焊接盘的中轴线周向均为分布，相邻的支撑脚之间存在间隙。
  16. 根据权利要求15所述的电池，其中，所述弧形凸起的数目和所述支撑脚的数目均为四个。
PCT/CN2022/092418 2021-05-21 2022-05-12 集流盘及电池 WO2022242538A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22803860.0A EP4160755A4 (en) 2021-05-21 2022-05-12 CURRENT COLLECTION PLATE AND BATTERY
US18/008,394 US20240234969A1 (en) 2021-05-21 2022-05-12 Current collector disk and battery

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Application Number Priority Date Filing Date Title
CN202121112734.0 2021-05-21
CN202121112734.0U CN215578630U (zh) 2021-05-21 2021-05-21 一种新型结构的负极集流盘、电池

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