WO2023240385A1 - Cellule de batterie, batterie et appareil électrique - Google Patents

Cellule de batterie, batterie et appareil électrique Download PDF

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Publication number
WO2023240385A1
WO2023240385A1 PCT/CN2022/098337 CN2022098337W WO2023240385A1 WO 2023240385 A1 WO2023240385 A1 WO 2023240385A1 CN 2022098337 W CN2022098337 W CN 2022098337W WO 2023240385 A1 WO2023240385 A1 WO 2023240385A1
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WO
WIPO (PCT)
Prior art keywords
limiting
battery cell
cell according
battery
present application
Prior art date
Application number
PCT/CN2022/098337
Other languages
English (en)
Chinese (zh)
Inventor
苏华圣
杜香龙
李全坤
邢承友
王鹏
金海族
Original Assignee
宁德时代新能源科技股份有限公司
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 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to PCT/CN2022/098337 priority Critical patent/WO2023240385A1/fr
Publication of WO2023240385A1 publication Critical patent/WO2023240385A1/fr

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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
    • 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, and in particular to a battery cell, a battery and an electrical device.
  • Embodiments of the present application provide a battery cell, a battery and an electrical device, which reduce the possibility of breakage of connecting parts and improve battery safety.
  • a first aspect of the embodiment of the present application provides a battery cell, including a casing, an electrode assembly and a connecting component.
  • the housing is provided with an electrode lead-out piece; the electrode assembly is accommodated in the housing and includes a first tab; the connecting component is used to electrically connect the first tab and the electrode lead-out piece, and includes a third tab.
  • a connecting part and a second connecting part The first connecting part is bent relative to the second connecting part. One of the first connecting part and the second connecting part is used to connect with the first pole.
  • the ear is electrically connected, and the other is used to electrically connect with the electrode lead-out piece;
  • the first connecting part is provided with a first limiting part
  • the second connecting part is provided with a second limiting part, and the first The limiting part cooperates with the second limiting part to limit the relative movement of the first connecting part and the second connecting part in a first direction, and the first direction is perpendicular to the first connecting part. thickness direction.
  • the relative displacement in the first direction in the connecting part can be reduced, fatigue in the first direction on the connecting part can be alleviated, and breakage of the connecting part can be reduced.
  • one of the first limiting part and the second limiting part includes a receiving part, and the other includes a first protruding part, and the first protruding part at least partially accommodates in the accommodating part.
  • the first limiting part and the second limiting part can be concave-convexly matched to achieve a movement in the first direction. limit each other, and limit the first connecting part and the second connecting part to each other.
  • the receiving portion includes a groove or a through hole.
  • the receiving part by configuring the receiving part as a groove or a through hole, it not only facilitates the shaping of the receiving part, but also enables the first convex part to more firmly limit the position of the receiving part.
  • the side wall of the receiving portion is provided with a notch, and the size of the notch is smaller than the size of the first protrusion.
  • the groove is in a closed shape.
  • the first convex part can be stably arranged in the connecting part, thereby improving the limiting effect of the accommodation part on the first convex part.
  • the side wall of the accommodation part includes a first guide surface
  • the side wall of the first protrusion includes a second guide surface
  • the first guide surface is connected with the second guide surface.
  • the guide surfaces are correspondingly arranged in the receiving portion.
  • the first connecting part includes a first body and a second convex part, and the second convex part protrudes from a surface of the first body facing the second connecting part. , at least part of the receiving portion is provided on the second protruding portion.
  • the first connection part can be protruded toward the second connection part, shortening the relative distance between the first protrusion and the accommodating part, and making it easier for the first protrusion and the accommodating part to limit each other.
  • a gap will be formed between the first connecting part and the second connecting part due to the bending angle, and the second convex part can also effectively compensate for this gap, improving the Stability after the first convex part and the receiving part are limited.
  • the first limiting part includes a groove, the groove is recessed from an end surface of the second convex part facing the second connecting part.
  • the second connecting part includes a first part and a second part, the first part is bent relative to the second part, and the second part connects the first part and the second part.
  • the first connecting part, one of the first connecting part and the first part is used to connect the first tab, and the other is used to connect the electrode lead-out member; the first part is provided with A second limiting part is provided, and/or the second part is provided with a second limiting part.
  • the connection between the electrode lead-out piece and the first tab can be facilitated.
  • both the first part and the second part are provided with a second limiting part, the second limiting part of the second part is a through hole, and the second limiting part is a through hole.
  • a part of the second limiting part is configured to pass through the through hole and cooperate with the first limiting part to limit the position.
  • the second limiting part of the first part can cooperate with the first limiting part to limit the position.
  • the overflow enhancement area by arranging the overflow enhancement area, the overflow loss of the second part due to the opening of the via hole can be compensated.
  • the first limiting part is located at the center of the first connecting part.
  • a second aspect of the embodiment of the present application provides a battery, including the above-mentioned battery cell.
  • a third aspect of the embodiment of the present application provides an electrical device, including the above-mentioned battery cell, for providing electrical energy.
  • the relative displacement in the first direction in the connecting component is reduced, and the relative displacement in the first direction is reduced. Possibility of breakage of connecting parts, improving battery safety.
  • Figure 3 is a schematic structural diagram of a battery provided by another embodiment of the present application.
  • Figure 4 is a schematic structural diagram of a battery cell provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a connecting component in an expanded state according to an embodiment of the present application.
  • FIG. 7 is a schematic cross-sectional structural diagram along the A-A direction in FIG. 6 .
  • FIG. 8 is a schematic cross-sectional structural view of a connecting component in a folded state according to another embodiment of the present application.
  • FIG. 10 is a schematic dimensional view of the first limiting part and the second limiting part of the connecting component in a folded state according to an embodiment of the present application.
  • Figure 11 is a schematic structural diagram of a receiving part provided by an embodiment of the present application.
  • Figure 12 is a schematic structural diagram of a connecting component in an expanded state according to yet another embodiment of the present application.
  • an embodiment means that a particular feature, structure or characteristic described in connection with the embodiment may be included in at least one embodiment of the application.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
  • the existence of the gap makes it easy for the electrode assembly to shake in the casing.
  • the shaking of the electrode assembly drives the connecting parts to shake, causing fatigue of the connecting parts, which in turn causes the adapter piece to break, causing safety issues.
  • adding a limiting structure in the connecting part can reduce the relative movement of the connecting part in the first direction, thereby improving the safety problems caused by the fracture of the connecting part and improving the battery Monolithic security.
  • the inventor of the present application has designed a battery cell, a battery and a power device after in-depth research.
  • battery cells may include lithium ion secondary battery cells, lithium ion primary battery cells, lithium sulfur battery cells, sodium lithium ion battery cells, sodium ion battery cells or magnesium ion battery cells, etc.
  • the embodiments of the present application are not limited to this.
  • the battery cell can be in the shape of cylinder, flat body, rectangular parallelepiped or other shapes.
  • electric devices mentioned in the embodiments of this application may be mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, etc.
  • electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, electric airplane toys, etc.
  • spacecraft can include airplanes, rockets, space shuttles, spaceships, etc.
  • the electric device is a vehicle.
  • the battery 100 can not only be used as an operating power source for the vehicle 1000 , but also can be used as a driving power source for the vehicle 1000 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000 .
  • FIG. 2 is a schematic structural diagram of a battery 100 provided in some embodiments of the present application.
  • the battery 100 includes a box body 110.
  • the box body 110 may include a first box body part 111 and a second box body part 112 that are connected.
  • a plurality of battery cells are connected in parallel, in series, or in mixed combination and then placed in the first box part.
  • the shapes of the first box part 111 and the second box part 112 can be determined according to the shape of a plurality of battery cells combined.
  • the battery cell may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which are not limited in the embodiments of the present application.
  • the packaging methods of the battery cells include but are not limited to cylindrical battery cells, rectangular battery cells, soft-pack battery cells, etc., and the embodiments of the present application are not specifically limited to this.
  • the battery 100 may also include other structures, such as bus components, for realizing electrical connections between multiple battery cells.
  • the housing 12 is provided with an electrode lead-out 123; the electrode assembly 11 is accommodated in the housing 12 and includes a first tab; the connecting component 2 is used to electrically connect the first tab and the electrode lead-out 123, and includes a first connecting portion 21 and a third tab.
  • Two connecting parts 22 The first connecting part 21 is bent relative to the second connecting part 22. One of the first connecting part 21 and the second connecting part 22 is used for electrical connection with the first tab, and the other is used for electrically connecting with the first tab.
  • the electrode lead-out piece 123 is electrically connected; the first connection part 21 is provided with a first limiting part 3, the second connecting part 22 is provided with a second limiting part 4, and the first limiting part 3 and the second limiting part 4 cooperate with each other.
  • the first direction is perpendicular to the thickness direction x of the first connecting part 21 .
  • Housing 12 may be used to contain an electrolyte, such as an electrolyte solution.
  • the housing 12 can be in various structural forms, such as rectangular parallelepiped, etc.
  • the shape of the housing 12 may be determined according to the specific shape of the electrode assembly 11 . If the electrode assembly 11 has a cylindrical structure, a cylindrical shell 12 can be used.
  • the housing 12 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.
  • the electrode assembly 11 may include a positive electrode piece, a negative electrode piece, and an isolation film.
  • the isolation film is used to insulate and isolate the positive electrode piece and the negative electrode piece.
  • the electrode assembly 11 may be a laminated structure, a rolled structure or other structures.
  • the electrode lead-out piece is used to electrically connect the electrode assembly with an external circuit to realize charging and discharging of the electrode assembly.
  • the electrode lead-out member 123 may be configured as a positive electrode terminal or a negative electrode terminal for electrically connecting with the electrode assembly 11 to output the electric energy generated by the electrode assembly 11 .
  • the first limiting part 3 and the second limiting part 4 may be a concave matching structure, an engaging structure or other structures.
  • the first connecting part 21 and the second connecting part 22 may have an integrated structure or a separate structure.
  • the connecting component 2 is bent, and the parts located on both sides of the fold are the first connecting part 21 and the second connecting part 22 respectively.
  • the thickness direction of the first connecting portion 21 is the x-axis direction in FIG. 5 .
  • the thickness direction of the first connecting portion 21 is the axial direction of the cylindrical battery cell.
  • the housing 12 may include a housing 121 and an end cover 122.
  • the housing 121 is a hollow structure with one side open.
  • the end cover 122 covers the opening of the housing 121 and forms a sealed connection to form a A sealed space accommodating the electrode assembly 11 and the electrolyte, the positive electrode terminal and the negative electrode terminal are installed on the end cap 122 .
  • the housing 12 may also be of other structures.
  • the housing 12 includes a housing 121 and two end caps 122.
  • the housing 121 is a hollow structure with openings on opposite sides, and one end cap 122 is correspondingly closed.
  • a sealed connection is formed at an opening of the housing 121 to form a sealed space for accommodating the electrode assembly 11 and the electrolyte.
  • the positive electrode terminal and the negative electrode terminal can be installed on the same end cap 122 or on different end caps 122 .
  • the groove is in a closed shape.
  • the first protruding part can be stably arranged in the connecting part, thereby improving the limiting effect of the receiving part on the first protruding part.
  • FIG. 11 is a schematic structural diagram of a receiving part provided by an embodiment of the present application.
  • the side wall of the accommodating part includes a first guide surface 32
  • the side wall of the first convex part includes a second guide surface 41.
  • the first guide surface 32 and the second guide surface 41 are in the receiving part. Corresponding settings within the department.
  • the first guide surface 32 is a side wall in the first direction y and/or the second direction z in the accommodation part, and the first guide surface 32 is inclined.
  • the top end of the first guide surface 32 is inclined toward the side away from the inside of the accommodation portion
  • the second direction z is perpendicular to the first direction y and the thickness direction x
  • the first guide surface 32 is in contact with the second direction z.
  • the guide surface 41 cooperates to make the passage area of the top end of the accommodation part larger than the passage area of the bottom end of the accommodation part, making it easier for the first protrusion to enter the accommodation part.
  • the first connecting part 21 includes a first body 211 and a second protruding part 212, and the second protruding part 212 protrudes from the first
  • the surface of the main body 211 faces the second connecting part 22, and at least part of the first limiting part 3 is provided on the second protruding part 212.
  • the first connecting portion 21 can be protruded toward the second connecting portion 22, shortening the relative distance between the first protruding portion and the accommodating portion, and facilitating the connection between the first protruding portion and the accommodating portion.
  • the first limiting part 3 includes a groove, which is recessed from the end surface of the second protruding part 212 facing the second connecting part 22 .
  • the groove and the first convex part can be punched and formed by the first connecting part 21 and the second connecting part 22 .
  • Figure 12 is a schematic structural diagram of the connecting component in an unfolded state according to yet another embodiment of the present application.
  • Figure 13 is a cross-sectional structure of the connecting component according to the embodiment shown in Figure 11 after being folded.
  • the second connection part 22 includes a first part 221 and a second part 222. The first part 221 is bent relative to the second part 222, and the second part 222 connects the first part 221 and the first connection.
  • the first connecting part 21 and the first part 221 are used to connect the first tab, and the other is used to connect the electrode lead out 123;
  • the first part 221 is provided with a second limiting part 4, and /Or, the second part 222 is provided with the second limiting part 4 .
  • both the first part 221 and the second part 222 are provided with a second limiting part 4, and the second limiting part 4 of the second part 222 is Through the through hole 301, the second limiting part 4 of the first part 221 is configured to pass through the through hole 301 and cooperate with the first limiting part 3 to limit the position.
  • the second limiting part 4 of the first part 221 can cooperate with the first limiting part 3 to limit the position.
  • an overcurrent enhancement area 302 is provided on the second part 222 with the via hole 301 .
  • the overflow enhancement area 302 the overflow loss in the second part 222 due to the opening of the via 301 can be compensated.
  • the first limiting part 3 is located at the center of the first connecting part 21 .
  • the first limiting part 3 can overlap with the central hole, optimizing the structure of the first connecting part 21 and making the first connecting part 21 more precise. concise.
  • An embodiment of the present application also provides a battery, including the above-mentioned battery cell.
  • An embodiment of the present application also provides an electrical device, including the above-mentioned battery cell, for providing electrical energy.
  • a battery cell including a casing 12 , an electrode assembly 11 and a connecting component 2 .
  • the housing 12 is provided with an electrode lead-out 123; the electrode assembly 11 is accommodated in the housing 12 and includes a first tab; the connecting component 2 is used to electrically connect the first tab and the electrode lead-out 123, and includes a first connecting portion 21 and a third tab.
  • Two connecting parts 22 The first connecting part 21 is integrally formed and bent relative to the second connecting part 22.
  • the first connecting part 21 is used to electrically connect with the first tab, and the second connecting part 22 includes a connected first part 221. and the second part 222.
  • the first part 221 is connected to the first connecting part 21, and the second part 222 is used to electrically connect with the electrode lead-out member 123;
  • the first connecting part 21 is provided with a first limiting part 3, and the second connecting part 22 is provided with a second limiting part 4,
  • the first limiting part 3 is configured as a groove
  • the second limiting part 4 is configured as a first convex part
  • the first connecting part 21 is also provided with a first portion 221 facing
  • the raised second convex portion 212 has a groove arranged on the second convex portion 212.
  • the first limiting portion 3 and the second limiting portion 4 cooperate with each other to limit the first connecting portion 21 and the second connecting portion 22 in the first position.
  • the first direction is perpendicular to the thickness direction of the first connecting portion 21 .

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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

La présente demande concerne, selon des modes de réalisation, une cellule de batterie, une batterie et un appareil électrique. La cellule de batterie comprend un boîtier, un ensemble électrode et un composant de connexion. Le boîtier est pourvu d'un élément de sortie d'électrode ; l'ensemble électrode est logé dans le boîtier et comprend une première languette ; le composant de connexion est utilisé pour connecter électriquement la première languette et l'élément de sortie d'électrode, et comprend une première partie de connexion et une seconde partie de connexion ; la première partie de connexion est pliée par rapport à la seconde partie de connexion ; l'une parmi la première partie de connexion et la seconde partie de connexion est utilisée pour la connexion électrique à la première languette, et l'autre est utilisée pour la connexion électrique à l'élément de sortie d'électrode ; la première partie de connexion est pourvue d'une première partie de limitation, la seconde partie de connexion est pourvue d'une seconde partie de limitation, la première partie de limitation et la seconde partie de limitation sont appariées l'une à l'autre de manière à limiter le mouvement relatif de la première partie de connexion et de la seconde partie de connexion dans une première direction, et la première direction est perpendiculaire à la direction de l'épaisseur de la première partie de connexion. La première partie de limitation et la seconde partie de limitation diminuent le déplacement relatif de l'élément de connexion et réduisent la rupture de celui-ci.
PCT/CN2022/098337 2022-06-13 2022-06-13 Cellule de batterie, batterie et appareil électrique WO2023240385A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/098337 WO2023240385A1 (fr) 2022-06-13 2022-06-13 Cellule de batterie, batterie et appareil électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2022/098337 WO2023240385A1 (fr) 2022-06-13 2022-06-13 Cellule de batterie, batterie et appareil électrique

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WO2023240385A1 true WO2023240385A1 (fr) 2023-12-21

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003077442A (ja) * 2001-09-03 2003-03-14 Gs-Melcotec Co Ltd 電池及び電池の製造装置
CN210692657U (zh) * 2019-07-26 2020-06-05 苏州安靠电源有限公司 集流盘、电池盖帽和圆柱形电池
CN212366046U (zh) * 2020-07-14 2021-01-15 横店集团东磁股份有限公司 一种锂电池极耳装配结构
CN213692281U (zh) * 2020-11-23 2021-07-13 宁德时代新能源科技股份有限公司 电池单体、电池以及用电装置
CN214336804U (zh) * 2021-01-25 2021-10-01 宁德时代新能源科技股份有限公司 电池单体、电池以及用电装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003077442A (ja) * 2001-09-03 2003-03-14 Gs-Melcotec Co Ltd 電池及び電池の製造装置
CN210692657U (zh) * 2019-07-26 2020-06-05 苏州安靠电源有限公司 集流盘、电池盖帽和圆柱形电池
CN212366046U (zh) * 2020-07-14 2021-01-15 横店集团东磁股份有限公司 一种锂电池极耳装配结构
CN213692281U (zh) * 2020-11-23 2021-07-13 宁德时代新能源科技股份有限公司 电池单体、电池以及用电装置
CN214336804U (zh) * 2021-01-25 2021-10-01 宁德时代新能源科技股份有限公司 电池单体、电池以及用电装置

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