WO2022033564A1 - Battery case and battery - Google Patents

Battery case and battery Download PDF

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Publication number
WO2022033564A1
WO2022033564A1 PCT/CN2021/112358 CN2021112358W WO2022033564A1 WO 2022033564 A1 WO2022033564 A1 WO 2022033564A1 CN 2021112358 W CN2021112358 W CN 2021112358W WO 2022033564 A1 WO2022033564 A1 WO 2022033564A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover plate
pole
sealing ring
battery case
limiting portion
Prior art date
Application number
PCT/CN2021/112358
Other languages
French (fr)
Chinese (zh)
Inventor
王永旺
曾玉祥
Original Assignee
珠海冠宇电池股份有限公司
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
Application filed by 珠海冠宇电池股份有限公司 filed Critical 珠海冠宇电池股份有限公司
Publication of WO2022033564A1 publication Critical patent/WO2022033564A1/en

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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
    • H01M50/10—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H01M50/148—Lids or covers characterised by their shape
    • H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
    • 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
    • H01M50/183—Sealing members
    • H01M50/186—Sealing members characterised by the disposition of the sealing members
    • H01M50/188—Sealing members characterised by the disposition of the sealing members the sealing members being arranged between the lid and terminal
    • 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 technical field of lithium ion batteries, and in particular, to a battery casing and a battery.
  • Lithium-ion batteries are usually electrically connected to external conductors through poles, or to adjacent single cells.
  • the poles are usually arranged on a cover plate, and the cover plate is provided with through holes for the poles to pass through.
  • the cover plate is provided with through holes for the poles to pass through.
  • there is a gap between the pole and the above-mentioned through hole and it is difficult to completely seal, which leads to the situation of liquid leakage of the lithium ion battery, which affects the performance and safety of the lithium ion battery.
  • the purpose of the embodiments of the present application is to provide a battery casing and a battery, which solve the problem of poor sealing performance of the battery structure in the prior art.
  • an embodiment of the present application provides a battery casing, which includes a cover plate, a casing, a pole and a sealing member.
  • the cover plate and the casing are welded to form a accommodating chamber.
  • the pole is arranged in the through hole and penetrates the cover plate, the seal is arranged in the through hole, and is sleeved on the side wall of the pole, and the seal is closely matched with the cover plate and the pole; the pole of the pole is located in the accommodating cavity
  • the outer peripheral wall of the outdoor room extends radially away from the center of the circle with a first limit portion, and the outer peripheral wall of the pole column located in the accommodating chamber extends radially away from the center of the circle with a second limit portion.
  • the outer diameter of the part is larger than the outer diameter of the first limiting part; the sealing element is at least partially located between the cover plate and the first limiting part, and/or the sealing element is at least partially located between the cover plate and the second limiting part.
  • the sealing member includes a first sealing ring, a second sealing ring and a connecting ring, the first sealing ring is connected with the second sealing ring through the connecting ring; the connecting ring is arranged in the through hole and sleeved on the side of the pole.
  • the connecting ring is closely matched with the cover plate and the pole, the first sealing ring is located between the cover plate and the first limiting part, and the second sealing ring is located between the cover plate and the second limiting part.
  • first sealing ring, the second sealing ring and the connecting ring are integrally formed by injection molding.
  • the outer diameter of the first sealing ring is greater than or equal to 1.5 times the outer diameter of the second sealing ring.
  • the battery casing further includes a metal washer, the metal washer is sleeved on the side wall of the pole post and is electrically connected to the pole post, and the metal washer is located between the first limiting part and the first sealing ring, and the outer diameter of the metal washer is Less than or equal to the outer diameter of the first sealing ring.
  • the outer diameter of the metal washer is greater than or equal to twice the outer diameter of the first limiting portion.
  • the battery housing further includes a tab adapter wire, and the tab adapter wire is connected to the metal gasket.
  • a step portion is formed on the cover plate near the first sealing ring, the step portion includes a first step surface and a second step surface, the first step surface is higher than the second step surface, and the first sealing ring is located on the metal gasket. and the second step surface.
  • the first step surface is provided with a liquid injection hole penetrating the cover plate
  • the battery casing further includes a liquid injection cover
  • the liquid injection cover is covered on the liquid injection hole to seal the liquid injection hole.
  • an embodiment of the present application further provides a battery, including a battery housing and a battery cell, the battery housing is the battery housing provided in the first aspect of the embodiment of the present application, and the battery cell is accommodated in a accommodating chamber.
  • the present application provides a battery casing and a battery, wherein the battery casing includes a cover plate, a casing, a pole and a sealing member, the cover plate and the casing are welded to form a accommodating chamber, a through hole is formed on the cover plate, and the pole is arranged In the through hole, the sealing element is sleeved on the side wall of the pole; the outer peripheral wall of the pole is respectively extended with a first limiting part and a second limiting part in the direction away from the center of the circle in the radial direction; Between the cover plate and the first limiting portion, and/or the sealing member is at least partially located between the cover plate and the second limiting portion.
  • the sealing between the cover plate and the first limiting part and the second limiting part of the pole can be realized by extruding the seal, which improves the sealing performance of the battery case. process to improve production efficiency.
  • FIG. 1 is a schematic cross-sectional view of a battery casing provided by an embodiment of the present application.
  • FIG. 2 is a schematic cross-sectional view of a pole column in a battery casing provided by an embodiment of the present application
  • FIG. 3 is a schematic cross-sectional view of a sealing member in a battery casing provided by an embodiment of the present application
  • FIG. 4 is a top view of a battery casing provided by an embodiment of the present application.
  • FIG. 5 is a perspective view of a battery case provided by an embodiment of the present application.
  • an embodiment of the present application provides a battery casing.
  • the battery casing includes a cover plate 100, a casing 200, a pole 300 and a sealing member 400.
  • the cover plate 100 and the casing 200 are welded to form an accommodation chamber.
  • the cover plate 100 is provided with a through hole, and the pole column 300 is arranged in the through hole. and penetrate through the cover plate 100 , the sealing member 400 is disposed in the through hole and sleeved on the side wall of the pole 300 , and the sealing member 400 is closely matched with the cover plate 100 and the pole 300 ;
  • the outer peripheral wall of the pole 300 located outside the accommodating chamber extends a first limiting portion 310 in a radial direction away from the center of the circle, and the outer peripheral wall of the pole 300 located in the accommodating chamber extends radially away from the center of the circle with a first limiting portion 310 .
  • Two limiting portions 320, the outer diameter of the second limiting portion 320 is larger than the outer diameter of the first limiting portion 310;
  • the sealing member 400 is at least partially located between the cover plate 100 and the first limiting portion 310 , and/or the sealing member 400 is at least partially located between the cover plate 100 and the second limiting portion 320 .
  • the pole post 300 is disposed in the through hole opened on the cover plate 100 , and the outer peripheral walls of the two ends of the pole post 300 extend radially away from the circle. , so that the longitudinal section of the pole 300 is "I"-shaped.
  • the outer peripheral wall of the pole 300 located outside the accommodating chamber can be understood as the outer peripheral wall of the pole 300 extending out of the cover plate, that is, the outer peripheral wall of the upper end of the pole 300 as shown in FIG. 1 .
  • the first limiting portion 310 is the limiting portion at the upper end of the pole 300; the outer peripheral wall of the pole 300 located in the accommodating chamber can be understood as the outer peripheral wall of the pole 300 extending into the cover plate, as shown in FIG. 1 Correspondingly, as shown in FIG. 2 , the first limiting part 310 is the limiting part of the lower end of the pole 300 .
  • the sealing member 400 is disposed in the space between the pole 300 and the through hole of the cover plate 100 , and is at least partially located between the cover plate 100 and the first limiting portion 310 , and/or the sealing member 400 is at least partially located at the cover plate 100 and the second limiting portion 320 .
  • the sealing member 400 may be located at least partially between the first limiting portion 310 and the cover plate 100 ; alternatively, the sealing member 400 may be located at least partially between the second limiting portion 320 and the cover plate 100 ; or, as shown in FIG. 1 As shown, a portion of the sealing member 400 is located between the first limiting portion 310 and the cover plate 100 , and a portion is located between the second limiting portion 320 and the cover plate 100 .
  • the cover plate 100 and the pole post 300 are both metal materials, such as aluminum, copper, etc.
  • the sealing member 400 is an insulating material, such as rubber, resin materials, etc., specifically, including but not limited to EPDM , fluorine rubber, PEEK, PFA and other materials, which usually have a certain elasticity.
  • the sealing member 400 includes a first sealing ring 410 , a second sealing ring 420 and a connecting ring 430 , and the first sealing ring 410 is connected with the second sealing ring 420 through the connecting ring 430 ;
  • the connecting ring 430 is disposed in the through hole and sleeved on the side wall of the pole 300 .
  • the connecting ring 430 is closely matched with the cover plate 100 and the pole 300 , and the first sealing ring 410 is located between the cover plate 100 and the first limiting portion. 310 , the second sealing ring 420 is located between the cover plate 100 and the second limiting portion 320 .
  • the sealing member 400 is divided into three parts: a first sealing ring 410 , a second sealing ring 420 and a connecting ring 430 , and the first sealing ring 410 is connected with the second sealing ring 420 through the connecting ring 430 , In the process of assembling the battery case, it is more convenient to operate.
  • the connecting ring 430 can be sleeved on the pole 300 and then placed in the through hole of the cover plate 100 , and then the first sealing ring 410 can be placed between the first limiting portion 310 and the cover plate 100 , and the second sealing ring 420 is located between the second limiting part 320 and the cover plate 100, and the connection between the first sealing ring 410 and the second sealing ring 420 and the connecting ring 430 is realized by welding or other means, and finally, through the pole The limiting portion of the column 300 and the cover plate 100 press the first sealing ring 410 and the second sealing ring 420 to achieve sealing.
  • first sealing ring 410 , the second sealing ring 420 and the connecting ring 430 can also be integrally formed by injection molding, which is not limited herein.
  • the battery case further includes a metal gasket 500 , the metal gasket 500 is sleeved on the side wall of the pole 300 , and the metal gasket 500 is arranged on the first limiting portion 310 and the first sealing ring 410 . between.
  • the metal washer 500 and the pole 300 can be made of metal materials with different hardness
  • the pole 300 can be made of metal with lower hardness, such as aluminum, copper, etc.
  • the metal washer 500 can be made of metal with higher hardness, such as Stainless steel, nickel, etc.
  • the metal washer 500 is disposed between the first limiting portion 310 and the first sealing ring 410 , and the cover plate 100 and the first limiting portion 310 of the pole 300 are sealed by pressing the sealing member 400 through the metal washer 500 .
  • the hardness of the gasket 500 is different from that of the pole 300 , and both the first limiting portion 310 and the sealing member 400 with lower hardness can deform to a certain extent, which further improves the sealing effect.
  • the diameter of the first sealing ring 410 is greater than or equal to the diameter of the metal washer 500 , which can play an insulating role to prevent the metal washer 500 from contacting the cover plate 1 and causing a short circuit. In one embodiment, the diameter of the first sealing ring 410 may be greater than or equal to 1.5 times the diameter of the second sealing ring 420 , which is not limited herein.
  • the diameter of the metal washer 500 is greater than or equal to twice the diameter of the first limiting portion 310 .
  • the battery is externally connected to the device through the pole 300, and the cross-sectional area of the pole 300 is generally small, it is inconvenient to connect the device in a specific implementation.
  • the metal washer 500 is electrically connected to the pole 300 , the metal washer 500 with a larger area can be used for an external device, which is more convenient to operate.
  • the battery case further includes a tab adapter wire 600 , and the tab adapter wire 600 is connected to the metal washer 500 .
  • the tab adapter wire 600 is connected to the metal washer 500 .
  • a step portion 110 is formed at a position close to the first sealing ring 410 of the cover plate 100 .
  • the step portion 110 includes a first step surface 111 and a second step surface 112 , and the first step surface 111 is high On the second stepped surface 112 , the first sealing ring 410 is located between the metal gasket 500 and the second stepped surface 112 .
  • a stepped portion 110 is formed on the cover plate 100 , wherein the first stepped surface 111 is higher than the second stepped surface 112 , that is, a pole is provided in the middle of the cover plate 100 .
  • the position of the pole 300 is slightly sunk, so that the first limiting portion 310 of the pole 300 is almost flush with the cover plate 100 , which can reduce the size of the battery casing in the vertical direction.
  • the first step surface 111 is provided with a liquid injection hole 700 penetrating the cover plate 100 , and the battery case further includes a liquid injection cover, which is installed on the liquid injection hole 700 to seal the liquid injection hole 700 .
  • the first step surface 111 is provided with a liquid injection hole 700 penetrating the cover plate 100 , and electrolyte can be injected from the liquid injection hole 700 , and then the liquid injection hole can be sealed through the liquid injection cover 700, the operation is more convenient.
  • the battery casing includes a cover plate 100 , a casing 200 , a pole 300 and a sealing member 400 .
  • the cover plate 100 and the casing 200 are welded to form a accommodating chamber, and the cover plate 100 is provided with a through hole.
  • the pole 300 is arranged in the through hole, and the sealing member 400 is sleeved on the side wall of the pole 300;
  • the limiting portion 320 ; the sealing member 400 is at least partially located between the cover plate 100 and the first limiting portion 310 , and/or the sealing member 400 is at least partially located between the cover plate 100 and the second limiting portion 320 .
  • the sealing between the cover plate 100 and the first limiting portion 310 and the second limiting portion 320 of the pole 300 can be achieved by extruding the sealing member 400, which improves the sealing performance of the battery case, and at the same time, this sealing method also reduces the The intermediate process of the battery case is improved, and the production efficiency is improved.
  • An embodiment of the present application further provides a battery, including a battery case and a battery cell, wherein the battery case is the battery case provided by the embodiments shown in FIGS. 1 to 5 , and the battery cell is accommodated in the accommodating chamber.
  • the battery includes all the technical features of the battery case provided by the embodiment shown in FIG. 1 to FIG. 5 , and can achieve all the technical effects that can be achieved by the battery case provided by the embodiment shown in FIG. 1 to FIG. 5 . , in order to avoid repetition, it is not repeated here.
  • the terms “installed”, “connected” and “connected” should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components.
  • installed should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

The present application provides a battery case and a battery. The battery case comprises a cover, a case body, a pole, and a sealing member; the cover and the case body are welded to form an accommodating chamber; the cover is provided with a through hole; the pole is disposed in the through hole; the sealing member is sleeved on the side wall of the pole; a first limiting portion and a second limiting portion are separately extended from the peripheral wall of the pole in the radial direction; the sealing member is at least partially located between the cover and the first limiting portion, and/or the sealing member is at least partially located between the cover and the second limiting portion. Sealing between the cover and the first limiting portion and the second limiting portion of the pole can be achieved by compressing the sealing member, thereby improving the sealing of the battery case; moreover, the sealing mode also reduces the intermediate manufacturing process of the battery case and improves the production efficiency.

Description

一种电池外壳及电池A battery case and battery
本申请要求于2020年08月13日提交中国专利局、申请号为202021688317.6、申请名称为“一种电池外壳及电池”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。This application claims the priority of the Chinese patent application with the application number 202021688317.6 and the application name "A battery case and battery" filed with the China Patent Office on August 13, 2020, the entire contents of which are incorporated into this application by reference.
技术领域technical field
本申请涉及锂离子电池技术领域，尤其涉及一种电池外壳及电池。The present application relates to the technical field of lithium ion batteries, and in particular, to a battery casing and a battery.
背景技术Background technique
随着科技的进步和发展，人们对可穿戴设备，譬如无线耳机、运动手表、手环、戒指等电子产品的需求日益提升，由于可穿戴设备的小型化设计，此类产品对于电池的空间尺寸和性能有着较高的要求。With the advancement and development of technology, people's demand for wearable devices, such as wireless earphones, sports watches, wristbands, rings and other electronic products is increasing. Due to the miniaturized design of wearable devices, the space size of such products for batteries and high performance requirements.
锂离子电池通常通过极柱与外部导体，或者与相邻的单体电池实现电连接。现有技术中，极柱通常设置于盖板上，盖板上设置有供极柱穿过的通孔。然而，极柱与上述通孔之间存在间隙，且难以完全密封，导致锂离子电池出现漏液的情况，影响锂离子电池的性能和安全性。Lithium-ion batteries are usually electrically connected to external conductors through poles, or to adjacent single cells. In the prior art, the poles are usually arranged on a cover plate, and the cover plate is provided with through holes for the poles to pass through. However, there is a gap between the pole and the above-mentioned through hole, and it is difficult to completely seal, which leads to the situation of liquid leakage of the lithium ion battery, which affects the performance and safety of the lithium ion battery.
可见，现有的电池结构存在密封性较差的问题。It can be seen that the existing battery structure has the problem of poor sealing.
发明内容SUMMARY OF THE INVENTION
本申请实施例的目的在于提供一种电池外壳及电池，解决了现有技术中电池结构密封性较差的问题。The purpose of the embodiments of the present application is to provide a battery casing and a battery, which solve the problem of poor sealing performance of the battery structure in the prior art.
为了达到上述目的，第一方面，本申请实施例提供一种电池外壳，包括盖板、壳体、极柱和密封件，盖板与壳体焊接形成一容纳腔室，盖板上开设有通孔，极柱设置于通孔中并贯穿盖板，密封件设置于通孔中，且套设于极柱的侧壁上，密封件与盖板及极柱紧密配合；极柱的位于容纳腔室外的外周壁沿径向向远离圆心的方向延伸有第一限位部，极柱的位于容纳腔室内的外周壁沿径向向远离圆心的方向延伸有第二限位部，第二限位部的外径大于第一限位部的外径；密封件至少部分位于盖板与第一限位部之 间，和/或，密封件至少部分位于盖板与第二限位部之间。In order to achieve the above purpose, in the first aspect, an embodiment of the present application provides a battery casing, which includes a cover plate, a casing, a pole and a sealing member. The cover plate and the casing are welded to form a accommodating chamber. The pole is arranged in the through hole and penetrates the cover plate, the seal is arranged in the through hole, and is sleeved on the side wall of the pole, and the seal is closely matched with the cover plate and the pole; the pole of the pole is located in the accommodating cavity The outer peripheral wall of the outdoor room extends radially away from the center of the circle with a first limit portion, and the outer peripheral wall of the pole column located in the accommodating chamber extends radially away from the center of the circle with a second limit portion. The outer diameter of the part is larger than the outer diameter of the first limiting part; the sealing element is at least partially located between the cover plate and the first limiting part, and/or the sealing element is at least partially located between the cover plate and the second limiting part.
可选的，密封件包括第一密封圈、第二密封圈和连接圈，第一密封圈通过连接圈与第二密封圈连接；连接圈设置于通孔中，且套设于极柱的侧壁上，连接圈与盖板及极柱紧密配合，第一密封圈位于盖板与第一限位部之间，第二密封圈位于盖板与第二限位部之间。Optionally, the sealing member includes a first sealing ring, a second sealing ring and a connecting ring, the first sealing ring is connected with the second sealing ring through the connecting ring; the connecting ring is arranged in the through hole and sleeved on the side of the pole. On the wall, the connecting ring is closely matched with the cover plate and the pole, the first sealing ring is located between the cover plate and the first limiting part, and the second sealing ring is located between the cover plate and the second limiting part.
可选的，第一密封圈、第二密封圈和连接圈注塑一体成型。Optionally, the first sealing ring, the second sealing ring and the connecting ring are integrally formed by injection molding.
可选的，第一密封圈的外径大于或者等于第二密封圈的外径的1.5倍。Optionally, the outer diameter of the first sealing ring is greater than or equal to 1.5 times the outer diameter of the second sealing ring.
可选的，电池外壳还包括金属垫圈，金属垫圈套设于极柱的侧壁上与极柱电连接，且金属垫圈位于第一限位部与第一密封圈之间，金属垫圈的外径小于或者等于第一密封圈的外径。Optionally, the battery casing further includes a metal washer, the metal washer is sleeved on the side wall of the pole post and is electrically connected to the pole post, and the metal washer is located between the first limiting part and the first sealing ring, and the outer diameter of the metal washer is Less than or equal to the outer diameter of the first sealing ring.
可选的，金属垫圈的外径大于或者等于第一限位部的外径的2倍。Optionally, the outer diameter of the metal washer is greater than or equal to twice the outer diameter of the first limiting portion.
可选的，电池外壳还包括极耳转接线，极耳转接线与金属垫圈连接。Optionally, the battery housing further includes a tab adapter wire, and the tab adapter wire is connected to the metal gasket.
可选的，盖板的靠近第一密封圈的位置形成有台阶部，台阶部包括第一台阶面和第二台阶面，第一台阶面高于第二台阶面，第一密封圈位于金属垫圈与第二台阶面之间。Optionally, a step portion is formed on the cover plate near the first sealing ring, the step portion includes a first step surface and a second step surface, the first step surface is higher than the second step surface, and the first sealing ring is located on the metal gasket. and the second step surface.
可选的，第一台阶面上开设有贯穿盖板的注液孔，电池外壳还包括注液盖，注液盖盖设于注液孔上，以密封注液孔。Optionally, the first step surface is provided with a liquid injection hole penetrating the cover plate, the battery casing further includes a liquid injection cover, and the liquid injection cover is covered on the liquid injection hole to seal the liquid injection hole.
第二方面，本申请实施例还提供一种电池，包括电池外壳和电芯，电池外壳为本申请实施例第一方面所提供的电池外壳，电芯收容于容纳腔室内。In a second aspect, an embodiment of the present application further provides a battery, including a battery housing and a battery cell, the battery housing is the battery housing provided in the first aspect of the embodiment of the present application, and the battery cell is accommodated in a accommodating chamber.
上述技术方案中的一个技术方案具有如下优点或有益效果：One of the technical solutions in the above-mentioned technical solutions has the following advantages or beneficial effects:
本申请提供一种电池外壳及电池，其中，电池外壳包括盖板、壳体、极柱和密封件，盖板与壳体焊接形成一容纳腔室，盖板上开设有通孔，极柱设置于通孔中，密封件套设于极柱的侧壁上；极柱的外周壁分别沿径向向远离圆心的方向延伸有第一限位部和第二限位部；密封件至少部分位于盖板与第一限位部之间，和/或，密封件至少部分位于盖板与第二限位部之间。盖板与极柱的第一限位部及第二限位部之间可通过挤压密封件实现密封，提高了电池壳体的密封性，同时，这样的密封方式还减少了电池外壳的中间制程，提高了生产效率。The present application provides a battery casing and a battery, wherein the battery casing includes a cover plate, a casing, a pole and a sealing member, the cover plate and the casing are welded to form a accommodating chamber, a through hole is formed on the cover plate, and the pole is arranged In the through hole, the sealing element is sleeved on the side wall of the pole; the outer peripheral wall of the pole is respectively extended with a first limiting part and a second limiting part in the direction away from the center of the circle in the radial direction; Between the cover plate and the first limiting portion, and/or the sealing member is at least partially located between the cover plate and the second limiting portion. The sealing between the cover plate and the first limiting part and the second limiting part of the pole can be realized by extruding the seal, which improves the sealing performance of the battery case. process to improve production efficiency.
附图说明Description of drawings
图1为本申请实施例提供的一种电池外壳的剖面示意图；1 is a schematic cross-sectional view of a battery casing provided by an embodiment of the present application;
图2为本申请实施例提供的一种电池外壳中极柱的剖面示意图；2 is a schematic cross-sectional view of a pole column in a battery casing provided by an embodiment of the present application;
图3为本申请实施例提供的一种电池外壳中密封件的剖面示意图；3 is a schematic cross-sectional view of a sealing member in a battery casing provided by an embodiment of the present application;
图4为本申请实施例提供的一种电池外壳的俯视图；4 is a top view of a battery casing provided by an embodiment of the present application;
图5为本申请实施例提供的一种电池外壳的立体图。FIG. 5 is a perspective view of a battery case provided by an embodiment of the present application.
具体实施方式detailed description
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.
如图1和图2所示，本申请实施例提供了一种电池外壳。As shown in FIG. 1 and FIG. 2 , an embodiment of the present application provides a battery casing.
电池外壳包括盖板100、壳体200、极柱300和密封件400，盖板100与壳体200焊接形成一容纳腔室，盖板100上开设有通孔，极柱300设置于通孔中并贯穿盖板100，密封件400设置于通孔中，且套设于极柱300的侧壁上，密封件400与盖板100及极柱300紧密配合；The battery casing includes a cover plate 100, a casing 200, a pole 300 and a sealing member 400. The cover plate 100 and the casing 200 are welded to form an accommodation chamber. The cover plate 100 is provided with a through hole, and the pole column 300 is arranged in the through hole. and penetrate through the cover plate 100 , the sealing member 400 is disposed in the through hole and sleeved on the side wall of the pole 300 , and the sealing member 400 is closely matched with the cover plate 100 and the pole 300 ;
极柱300的位于容纳腔室外的外周壁沿径向向远离圆心的方向延伸有第一限位部310，极柱300的位于容纳腔室内的外周壁沿径向向远离圆心的方向延伸有第二限位部320，第二限位部320的外径大于第一限位部310的外径；The outer peripheral wall of the pole 300 located outside the accommodating chamber extends a first limiting portion 310 in a radial direction away from the center of the circle, and the outer peripheral wall of the pole 300 located in the accommodating chamber extends radially away from the center of the circle with a first limiting portion 310 . Two limiting portions 320, the outer diameter of the second limiting portion 320 is larger than the outer diameter of the first limiting portion 310;
密封件400至少部分位于盖板100与第一限位部310之间，和/或，密封件400至少部分位于盖板100与第二限位部320之间。The sealing member 400 is at least partially located between the cover plate 100 and the first limiting portion 310 , and/or the sealing member 400 is at least partially located between the cover plate 100 and the second limiting portion 320 .
本申请实施例中，如图1所示，极柱300设置于盖板100上开设的通孔中，极柱300的两端的外周壁上分别沿径向向远离圆形的方向延伸有限位部，使极柱300的纵截面呈“工”字形。其中，极柱300的位于容纳腔室外的外周壁可以理解为极柱300伸出盖板外的外周壁，即如图1所示的极柱300上端的外周壁，对应的，如图2所示，第一限位部310为极柱300上端的限位部；极柱300的位于容纳腔室内的外周壁可以理解为极柱300伸入盖板内的外周壁，即如图1所示的极柱300下端的外周壁，对应的，如图2所示，第一限位部310为极柱300下端的限位部。In the embodiment of the present application, as shown in FIG. 1 , the pole post 300 is disposed in the through hole opened on the cover plate 100 , and the outer peripheral walls of the two ends of the pole post 300 extend radially away from the circle. , so that the longitudinal section of the pole 300 is "I"-shaped. The outer peripheral wall of the pole 300 located outside the accommodating chamber can be understood as the outer peripheral wall of the pole 300 extending out of the cover plate, that is, the outer peripheral wall of the upper end of the pole 300 as shown in FIG. 1 . Correspondingly, as shown in FIG. 2 As shown, the first limiting portion 310 is the limiting portion at the upper end of the pole 300; the outer peripheral wall of the pole 300 located in the accommodating chamber can be understood as the outer peripheral wall of the pole 300 extending into the cover plate, as shown in FIG. 1 Correspondingly, as shown in FIG. 2 , the first limiting part 310 is the limiting part of the lower end of the pole 300 .
密封件400设置于极柱300与盖板100通孔之间的空间内，且至少部分位于盖板100与第一限位部310之间，和/或，密封件400至少部分位于盖板100与第二限位部320之间。具体的，密封件400可至少部分位于第一限位部310与盖板100之间；或者，密封件400可至少部分位于第二限位部320与盖板100之间；或者，如图1所示，密封件400的部分位于第一限位部310与盖板100之间，以及部分位于第二限位部320与盖板100之间。The sealing member 400 is disposed in the space between the pole 300 and the through hole of the cover plate 100 , and is at least partially located between the cover plate 100 and the first limiting portion 310 , and/or the sealing member 400 is at least partially located at the cover plate 100 and the second limiting portion 320 . Specifically, the sealing member 400 may be located at least partially between the first limiting portion 310 and the cover plate 100 ; alternatively, the sealing member 400 may be located at least partially between the second limiting portion 320 and the cover plate 100 ; or, as shown in FIG. 1 As shown, a portion of the sealing member 400 is located between the first limiting portion 310 and the cover plate 100 , and a portion is located between the second limiting portion 320 and the cover plate 100 .
本申请实施例中，盖板100和极柱300均为金属材料，例如铝、铜等，而密封件400为绝缘材料，如橡胶、树脂材料等，具体的，包括但不限于三元乙丙、氟橡胶、PEEK、PFA等材料，其通常具有一定弹性。这样，盖板100与极柱300的第一限位部310及第二限位部320之间可通过挤压密封件400，使其产生一定形变而实现密封，不仅提高了电池壳体的密封性，同时，这样的密封方式还减少了电池外壳的中间制程，提高了生产效率。In the embodiment of the present application, the cover plate 100 and the pole post 300 are both metal materials, such as aluminum, copper, etc., and the sealing member 400 is an insulating material, such as rubber, resin materials, etc., specifically, including but not limited to EPDM , fluorine rubber, PEEK, PFA and other materials, which usually have a certain elasticity. In this way, sealing between the cover plate 100 and the first limiting portion 310 and the second limiting portion 320 of the pole 300 can be achieved by squeezing the sealing member 400 to produce a certain deformation, which not only improves the sealing of the battery case At the same time, this sealing method also reduces the intermediate process of the battery case and improves the production efficiency.
可选的，如图3所示，密封件400包括第一密封圈410、第二密封圈420和连接圈430，第一密封圈410通过连接圈430与第二密封圈420连接；Optionally, as shown in FIG. 3 , the sealing member 400 includes a first sealing ring 410 , a second sealing ring 420 and a connecting ring 430 , and the first sealing ring 410 is connected with the second sealing ring 420 through the connecting ring 430 ;
连接圈430设置于通孔中，且套设于极柱300的侧壁上，连接圈430与盖板100及极柱300紧密配合，第一密封圈410位于盖板100与第一限位部310之间，第二密封圈420位于盖板100与第二限位部320之间。The connecting ring 430 is disposed in the through hole and sleeved on the side wall of the pole 300 . The connecting ring 430 is closely matched with the cover plate 100 and the pole 300 , and the first sealing ring 410 is located between the cover plate 100 and the first limiting portion. 310 , the second sealing ring 420 is located between the cover plate 100 and the second limiting portion 320 .
本实施例中，如图3所示，密封件400分为第一密封圈410、第二密封圈420和连接圈430三部分，第一密封圈410通过连接圈430与第二密封圈420连接，在电池壳体的组装过程中，更加方便操作。具体实施时，可先将连接圈430套设于极柱300上后置于盖板100的通孔中，之后，将第一密封圈410置于第一限位部310与盖板100之间，以及将第二密封圈420位于第二限位部320与盖板100之间，并通过熔接等方式实现第一密封圈410及第二密封圈420与连接圈430的连接，最后，通过极柱300的限位部与盖板100挤压第一密封圈410及第二密封圈420实现密封。In this embodiment, as shown in FIG. 3 , the sealing member 400 is divided into three parts: a first sealing ring 410 , a second sealing ring 420 and a connecting ring 430 , and the first sealing ring 410 is connected with the second sealing ring 420 through the connecting ring 430 , In the process of assembling the battery case, it is more convenient to operate. In specific implementation, the connecting ring 430 can be sleeved on the pole 300 and then placed in the through hole of the cover plate 100 , and then the first sealing ring 410 can be placed between the first limiting portion 310 and the cover plate 100 , and the second sealing ring 420 is located between the second limiting part 320 and the cover plate 100, and the connection between the first sealing ring 410 and the second sealing ring 420 and the connecting ring 430 is realized by welding or other means, and finally, through the pole The limiting portion of the column 300 and the cover plate 100 press the first sealing ring 410 and the second sealing ring 420 to achieve sealing.
需要说明的是，在一种实施方式中，第一密封圈410、第二密封圈420和连接圈430也可注塑一体成型，在此不作任何限定。It should be noted that, in an embodiment, the first sealing ring 410 , the second sealing ring 420 and the connecting ring 430 can also be integrally formed by injection molding, which is not limited herein.
可选的，如图1所示，电池外壳还包括金属垫圈500，金属垫圈500套设于极柱300的侧壁上，且金属垫圈500设置于第一限位部310与第一密封圈410之间。Optionally, as shown in FIG. 1 , the battery case further includes a metal gasket 500 , the metal gasket 500 is sleeved on the side wall of the pole 300 , and the metal gasket 500 is arranged on the first limiting portion 310 and the first sealing ring 410 . between.
本实施例中，金属垫圈500可与极柱300可采用不同硬度的金属材料，极柱300可采用硬度较低的金属，例如铝、铜等，金属垫圈500可采用硬度较高的金属，例如不锈钢、镍等。这样，金属垫圈500设置于第一限位部310与第一密封圈410之间，盖板100与极柱300的第一限位部310通过金属垫圈500挤压密封件400实现密封，由于金属垫圈500与极柱300的硬度不同，硬度较低的第一限位部310和密封件400均可产生一定程度的形变，进一步提高了密封效果。In this embodiment, the metal washer 500 and the pole 300 can be made of metal materials with different hardness, the pole 300 can be made of metal with lower hardness, such as aluminum, copper, etc., and the metal washer 500 can be made of metal with higher hardness, such as Stainless steel, nickel, etc. In this way, the metal washer 500 is disposed between the first limiting portion 310 and the first sealing ring 410 , and the cover plate 100 and the first limiting portion 310 of the pole 300 are sealed by pressing the sealing member 400 through the metal washer 500 . The hardness of the gasket 500 is different from that of the pole 300 , and both the first limiting portion 310 and the sealing member 400 with lower hardness can deform to a certain extent, which further improves the sealing effect.
本实施例中，第一密封圈410的直径大于或者等于金属垫圈500的直径，可以起到绝缘的作用，以防止金属垫圈500与盖板1接触而短路。在一种实施方式中，第一密封圈410的直径可大于或者等于第二密封圈420的直径的1.5倍，在此不作任何限定。In this embodiment, the diameter of the first sealing ring 410 is greater than or equal to the diameter of the metal washer 500 , which can play an insulating role to prevent the metal washer 500 from contacting the cover plate 1 and causing a short circuit. In one embodiment, the diameter of the first sealing ring 410 may be greater than or equal to 1.5 times the diameter of the second sealing ring 420 , which is not limited herein.
进一步的，金属垫圈500的直径大于或者等于第一限位部310的直径的2倍。Further, the diameter of the metal washer 500 is greater than or equal to twice the diameter of the first limiting portion 310 .
由于现有技术中，电池通过极柱300外接设备，而极柱300的横截面积通常较小，在具体实施中，外接设备不太方便。本实施例中，如图4所示，由于金属垫圈500与极柱300电连接，较大面积的金属垫圈500可用于外接设备，操作起来更加方便。Since in the prior art, the battery is externally connected to the device through the pole 300, and the cross-sectional area of the pole 300 is generally small, it is inconvenient to connect the device in a specific implementation. In this embodiment, as shown in FIG. 4 , since the metal washer 500 is electrically connected to the pole 300 , the metal washer 500 with a larger area can be used for an external device, which is more convenient to operate.
进一步的，如图1和图4所示，电池外壳还包括极耳转接线600，极耳转接线600与金属垫圈500连接。这样，相比将极耳转接线600连接于极柱300的第一限位部310上，将极耳转接线600连接于面积更大的金属垫圈500上，操作更加方便，制程更加简单。Further, as shown in FIG. 1 and FIG. 4 , the battery case further includes a tab adapter wire 600 , and the tab adapter wire 600 is connected to the metal washer 500 . In this way, compared with connecting the tab adapter wire 600 to the first limiting portion 310 of the pole 300 , connecting the tab adapter wire 600 to the metal washer 500 with a larger area is more convenient to operate and simpler to process.
可选的，如图5所示，盖板100的靠近第一密封圈410的位置形成有台阶部110，台阶部110包括第一台阶面111和第二台阶面112，第一台阶面111高于第二台阶面112，第一密封圈410位于金属垫圈500与第二台阶面112之间。Optionally, as shown in FIG. 5 , a step portion 110 is formed at a position close to the first sealing ring 410 of the cover plate 100 . The step portion 110 includes a first step surface 111 and a second step surface 112 , and the first step surface 111 is high On the second stepped surface 112 , the first sealing ring 410 is located between the metal gasket 500 and the second stepped surface 112 .
本实施例中，如图1和图5所示，盖板100上形成有台阶部110，其中，第一台阶面111高于第二台阶面112，也就是说，盖板100中部设置有极柱300的位置稍稍下沉，使得极柱300的第一限位部310与盖板100差不多齐平，这样可以减小电池外壳垂直方向上的尺寸。In this embodiment, as shown in FIG. 1 and FIG. 5 , a stepped portion 110 is formed on the cover plate 100 , wherein the first stepped surface 111 is higher than the second stepped surface 112 , that is, a pole is provided in the middle of the cover plate 100 . The position of the pole 300 is slightly sunk, so that the first limiting portion 310 of the pole 300 is almost flush with the cover plate 100 , which can reduce the size of the battery casing in the vertical direction.
进一步的，第一台阶面111上开设有贯穿盖板100的注液孔700，电池外壳还包括注液盖，注液盖盖设于注液孔700上，以密封注液孔700。Further, the first step surface 111 is provided with a liquid injection hole 700 penetrating the cover plate 100 , and the battery case further includes a liquid injection cover, which is installed on the liquid injection hole 700 to seal the liquid injection hole 700 .
本实施例中，如图5所示，第一台阶面111上开设有贯穿盖板100的注液孔700，可从注液孔700注入电解液，之后通过注液盖即可密封注液孔700，操作更加方便。In this embodiment, as shown in FIG. 5 , the first step surface 111 is provided with a liquid injection hole 700 penetrating the cover plate 100 , and electrolyte can be injected from the liquid injection hole 700 , and then the liquid injection hole can be sealed through the liquid injection cover 700, the operation is more convenient.
综上，本申请实施例中，电池外壳包括盖板100、壳体200、极柱300和密封件400，盖板100与壳体200焊接形成一容纳腔室，盖板100上开设有通孔，极柱300设置于通孔中，密封件400套设于极柱300的侧壁上；极柱300的外周壁分别沿径向向远离圆心的方向延伸有第一限位部310和第二限位部320；密封件400至少部分位于盖板100与第一限位部310之间，和/或，密封件400至少部分位于盖板100与第二限位部320之间。盖板100与极柱300的第一限位部310及第二限位部320之间可通过挤压密封件400实现密封，提高了电池壳体的密封性，同时，这样的密封方式还减少了电池外壳的中间制程，提高了生产效率。To sum up, in the embodiment of the present application, the battery casing includes a cover plate 100 , a casing 200 , a pole 300 and a sealing member 400 . The cover plate 100 and the casing 200 are welded to form a accommodating chamber, and the cover plate 100 is provided with a through hole. , the pole 300 is arranged in the through hole, and the sealing member 400 is sleeved on the side wall of the pole 300; The limiting portion 320 ; the sealing member 400 is at least partially located between the cover plate 100 and the first limiting portion 310 , and/or the sealing member 400 is at least partially located between the cover plate 100 and the second limiting portion 320 . The sealing between the cover plate 100 and the first limiting portion 310 and the second limiting portion 320 of the pole 300 can be achieved by extruding the sealing member 400, which improves the sealing performance of the battery case, and at the same time, this sealing method also reduces the The intermediate process of the battery case is improved, and the production efficiency is improved.
本申请实施例还提供了一种电池，包括电池外壳和电芯，其中，电池外壳为如图1至图5所示实施例提供的电池外壳，电芯收容于容纳腔室内。An embodiment of the present application further provides a battery, including a battery case and a battery cell, wherein the battery case is the battery case provided by the embodiments shown in FIGS. 1 to 5 , and the battery cell is accommodated in the accommodating chamber.
本申请实施例中，电池包括如图1至图5所示实施例提供的电池外壳的全部技术特征，且可实现如图1至图5所示实施例提供的电池外壳可实现的全部技术效果，为避免重复，在此不再赘述。In the embodiment of the present application, the battery includes all the technical features of the battery case provided by the embodiment shown in FIG. 1 to FIG. 5 , and can achieve all the technical effects that can be achieved by the battery case provided by the embodiment shown in FIG. 1 to FIG. 5 . , in order to avoid repetition, it is not repeated here.
需要说明的是，本申请实施例中介绍的多种可选的实施方式，彼此可以相互结合实现，也可以单独实现，对此本申请实施例不作限定。It should be noted that the various optional implementation manners introduced in the embodiments of the present application may be implemented in combination with each other, or may be implemented independently, which are not limited by the embodiments of the present application.
在本申请的描述中，需要理解的是，术语“上”、“下”、“左”、“右”等指示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、以及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，“第一”、“第二”仅由于描述目的，且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。因此，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多个该特征。本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for convenience The present application is described and simplified without indicating or implying that the device or element referred to must have a particular orientation, as well as a particular orientation configuration and operation, and therefore should not be construed as limiting the application. In addition, "first" and "second" are for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "plurality" means two or more.
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”“相连”“连接”等应做广义理解，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，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连接，可以是两个元件内部的 连通。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。In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.
上述实施例是参考附图来描述的，其他不同的形式和实施例也是可行而不偏离本申请的原理，因此，本申请不应被建构成为在此所提出实施例的限制。更确切地说，这些实施例被提供以使得本申请会是完善又完整，且会将本申请范围传达给本领域技术人员。在附图中，组件尺寸及相对尺寸也许基于清晰起见而被夸大。在此所使用的术语只是基于描述特定实施例目的，并无意成为限制用。术语“包含”及/或“包括”在使用于本说明书时，表示特征、整数、构件及/或组件的存在，但不排除一或更多其它特征、整数、构件、组件及/或其族群的存在或增加。除非另有所示，陈述时，一值范围包含该范围的上下限及其间的任何子范围。The above-mentioned embodiments are described with reference to the accompanying drawings, and other different forms and embodiments are also possible without departing from the principles of the present application. Therefore, the present application should not be construed as being limited to the embodiments presented herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will convey the scope of the application to those skilled in the art. In the drawings, component sizes and relative sizes may be exaggerated for clarity. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. The terms "comprising" and/or "including" as used in this specification denote the presence of features, integers, components and/or components, but do not exclude one or more other features, integers, components, components and/or groups thereof presence or increase. Unless otherwise indicated, when stated, a range of values includes the upper and lower limits of that range and any subranges therebetween.
以上的是本申请的优选实施方式，应当指出对于本技术领域的普通人员来说，在不脱离本申请的原理前提下还可以作出若干改进和润饰，这些改进和润饰也在本申请的保护范围内。The above are the preferred embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also within the protection scope of the present application. Inside.

Claims (10)

  1. 一种电池外壳，其特征在于，包括盖板、壳体、极柱和密封件，所述盖板与所述壳体焊接形成一容纳腔室，所述盖板上开设有通孔，所述极柱设置于所述通孔中并贯穿所述盖板，所述密封件设置于所述通孔中，且套设于所述极柱的侧壁上，所述密封件与所述盖板及所述极柱紧密配合；A battery casing is characterized in that it comprises a cover plate, a casing, a pole and a sealing member, the cover plate and the casing are welded to form a accommodating chamber, the cover plate is provided with a through hole, the The pole is arranged in the through hole and penetrates the cover plate, the seal is arranged in the through hole and sleeved on the side wall of the pole, the seal and the cover plate and the poles are closely matched;
    所述极柱的位于所述容纳腔室外的外周壁沿径向向远离圆心的方向延伸有第一限位部，所述极柱的位于所述容纳腔室内的外周壁沿径向向远离圆心的方向延伸有第二限位部，所述第二限位部的外径大于所述第一限位部的外径；The outer peripheral wall of the pole located outside the accommodating chamber is extended with a first limiting portion in a radial direction away from the center of the circle, and the outer peripheral wall of the pole located in the accommodating chamber is radially away from the center of the circle There is a second limit portion extending in the direction of the second limit portion, and the outer diameter of the second limit portion is larger than the outer diameter of the first limit portion;
    所述密封件至少部分位于所述盖板与所述第一限位部之间，和/或，所述密封件至少部分位于所述盖板与所述第二限位部之间。The sealing member is at least partially located between the cover plate and the first limiting portion, and/or the sealing member is at least partially located between the cover plate and the second limiting portion.
  2. 根据权利要求1所述的电池外壳，其特征在于，所述密封件包括第一密封圈、第二密封圈和连接圈，所述第一密封圈通过所述连接圈与所述第二密封圈连接；The battery case according to claim 1, wherein the sealing member comprises a first sealing ring, a second sealing ring and a connecting ring, and the first sealing ring is connected to the second sealing ring through the connecting ring connect;
    所述连接圈设置于所述通孔中，且套设于所述极柱的侧壁上，所述连接圈与所述盖板及所述极柱紧密配合，所述第一密封圈位于所述盖板与所述第一限位部之间，所述第二密封圈位于所述盖板与所述第二限位部之间。The connecting ring is arranged in the through hole and sleeved on the side wall of the pole. The connecting ring is closely matched with the cover plate and the pole, and the first sealing ring is located in the Between the cover plate and the first limiting portion, the second sealing ring is located between the cover plate and the second limiting portion.
  3. 根据权利要求2所述的电池外壳，其特征在于，所述第一密封圈、所述第二密封圈和所述连接圈注塑一体成型。The battery case according to claim 2, wherein the first sealing ring, the second sealing ring and the connecting ring are integrally formed by injection molding.
  4. 根据权利要求2所述的电池外壳，其特征在于，所述第一密封圈的外径大于或者等于所述第二密封圈的外径的1.5倍。The battery case according to claim 2, wherein the outer diameter of the first sealing ring is greater than or equal to 1.5 times the outer diameter of the second sealing ring.
  5. 根据权利要求2所述的电池外壳，其特征在于，所述电池外壳还包括金属垫圈，所述金属垫圈套设于所述极柱的侧壁上与所述极柱电连接，且所述金属垫圈位于所述第一限位部与所述第一密封圈之间，所述金属垫圈的外径小于或者等于所述第一密封圈的外径。The battery case according to claim 2, wherein the battery case further comprises a metal washer, the metal washer is sleeved on the side wall of the pole and is electrically connected to the pole, and the metal The gasket is located between the first limiting portion and the first sealing ring, and the outer diameter of the metal gasket is smaller than or equal to the outer diameter of the first sealing ring.
  6. 根据权利要求5所述的电池外壳，其特征在于，所述金属垫圈的外径大于或者等于所述第一限位部的外径的2倍。The battery case according to claim 5, wherein the outer diameter of the metal gasket is greater than or equal to twice the outer diameter of the first limiting portion.
  7. 根据权利要求6所述的电池外壳，其特征在于，所述电池外壳还包括极耳转接线，所述极耳转接线与所述金属垫圈连接。The battery case according to claim 6, wherein the battery case further comprises a tab adapter wire, and the tab adapter wire is connected to the metal gasket.
  8. 根据权利要求5所述的电池外壳，其特征在于，所述盖板的靠近所 述第一密封圈的位置形成有台阶部，所述台阶部包括第一台阶面和第二台阶面，所述第一台阶面高于所述第二台阶面，所述第一密封圈位于所述金属垫圈与所述第二台阶面之间。The battery case according to claim 5, wherein a step portion is formed at a position of the cover plate close to the first sealing ring, and the step portion includes a first step surface and a second step surface, and the step portion includes a first step surface and a second step surface. The first stepped surface is higher than the second stepped surface, and the first sealing ring is located between the metal gasket and the second stepped surface.
  9. 根据权利要求8所述的电池外壳，其特征在于，所述第一台阶面上开设有贯穿所述盖板的注液孔，所述电池外壳还包括注液盖，所述注液盖盖设于所述注液孔上，以密封所述注液孔。The battery case according to claim 8, wherein a liquid injection hole penetrating the cover plate is formed on the first step surface, the battery case further comprises a liquid injection cover, and the liquid injection cover is provided with a liquid injection hole. on the liquid injection hole to seal the liquid injection hole.
  10. 一种电池，其特征在于，包括电池外壳和电芯，所述电池外壳为如权利要求1至9任一项所述的电池外壳，所述电芯收容于所述容纳腔室内。A battery, characterized in that it comprises a battery case and a battery cell, the battery case is the battery case according to any one of claims 1 to 9, and the battery cell is accommodated in the accommodating chamber.
PCT/CN2021/112358 2020-08-13 2021-08-12 Battery case and battery WO2022033564A1 (en)

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