WO2023159772A1 - 圆柱型电池单体、电池和用电装置 - Google Patents

圆柱型电池单体、电池和用电装置 Download PDF

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Publication number
WO2023159772A1
WO2023159772A1 PCT/CN2022/091949 CN2022091949W WO2023159772A1 WO 2023159772 A1 WO2023159772 A1 WO 2023159772A1 CN 2022091949 W CN2022091949 W CN 2022091949W WO 2023159772 A1 WO2023159772 A1 WO 2023159772A1
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WIPO (PCT)
Prior art keywords
pole
electrode assembly
battery cell
cylindrical battery
welding
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PCT/CN2022/091949
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English (en)
French (fr)
Inventor
殷黎
许虎
牛少军
李星
钟学奇
陈佳华
Original Assignee
宁德时代新能源科技股份有限公司
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Publication of WO2023159772A1 publication Critical patent/WO2023159772A1/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
    • H01M50/10—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
    • H01M50/50—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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present application relates to the technical field of batteries, in particular to cylindrical battery cells, batteries and electrical devices.
  • the manufacturing process of cylindrical batteries includes: directly welding the tabs of the electrode assembly to the top cover, so that the top cover can be used to package the electrode assembly, and the top cover can be used as a current collector. In this way, the battery structure can be saved and the battery structure can be simplified. Assembly process, however, the conventional cylindrical battery has poor flow capacity.
  • the present application provides a cylindrical battery cell, including an electrode assembly, a top cover, and a plurality of protrusions.
  • the electrode assembly has a tab, and the tab includes a non-welding area and a welding area.
  • the top cover is provided with a pole and a welding part, the welding part is welded to the welding area, and at least part of the bottom end of the pole is in contact with the non-welding area, so that the electrode assembly can be electrically connected with the pole.
  • a plurality of protrusions are arranged on the side of the pole facing the electrode assembly, and are at least partially plugged into the non-welding area of the tab.
  • the raised portion is mechanically inserted into contact with the non-welded area of the tab.
  • the flow area of the cylindrical battery cell can be increased, and the flow capacity of the cylindrical battery cell can be improved.
  • it can improve the bonding fastness of the top cover and the electrode assembly, improve the fatigue resistance of the welding area, and then improve the connection reliability of the top cover and the electrode assembly.
  • the end of the protruding portion away from the pole is provided with a tip for inserting into the non-welding area of the tab. It is convenient to better insert the protrusion into the non-welding area of the tab, thereby increasing the flow area of the cylindrical battery cell and improving the bonding fastness of the top cover and the electrode assembly.
  • the pole has a cylindrical structure, and the plurality of protrusions are arranged in a ring around the centerline of the pole and are spaced apart from each other.
  • a plurality of protrusions can be used to increase the flow area of the cylindrical battery cell, and improve the bonding fastness of the top cover and the electrode assembly along the circumferential direction.
  • the pole has a cylindrical structure, and a plurality of protrusions are arranged around the center line of the pole to form multiple sets of protrusions arranged at intervals in the radial direction, and each protrusion group includes
  • the central line of the column is a plurality of protrusions arranged in a ring and spaced apart from each other.
  • the height of the protrusion is smaller the farther it is from the center line of the pole.
  • the electrode assembly further includes a central hole, and the protrusion near the centerline of the pole protrudes into the central hole of the electrode assembly.
  • the protruding part protruding into the central hole of the electrode assembly can be used to support the electrode assembly, which is equivalent to the electrode assembly surrounding the protruding part, so as to avoid the influence of factors such as excessive expansion force of the cylindrical battery cell during use. The occurrence of collapse avoids affecting the interface of the pole piece of the inner ring, which can improve the safety of the cylindrical battery cell.
  • a portion of the upper surface of the top cover corresponding to the welding portion is provided with a groove of a predetermined depth, so that the welding portion can pass through and be welded to the welding area. It is convenient for the welding part to be connected to the welding area by penetration welding. The penetration welding operation is usually carried out within a certain depth range, and the grooves provided can ensure the firmness of the welding.
  • a liquid injection hole is provided on the pole, and a liquid storage chamber is provided on the side of the pole facing the electrode assembly, and the liquid storage chamber communicates with the liquid injection hole.
  • the external electrolyte can enter the inside of the electrode assembly through the liquid injection hole and the liquid storage chamber, which is beneficial to further increase the infiltration speed of the electrolyte.
  • the protrusion is provided with a guide channel with one end communicating with the liquid storage cavity, and the other end of the guide channel is provided at the part where the protrusion is inserted into the non-welding area.
  • the electrolyte flowing into the liquid storage chamber can be diverted to the non-welding area of the tab through the diversion channel, so that the electrolyte can flow into the interlayer of the electrode assembly of the electrode assembly more smoothly, and the flow capacity of the electrolyte is further improved.
  • the gap between the protrusion and the tab can increase the flow space of the electrolyte, improve the wettability of the electrolyte between the electrode sheets, and at the same time allow the gas generated inside the electrode assembly to be discharged faster, so as to improve the efficiency of the cylindrical battery cell. body safety.
  • the welding area surrounds the non-welding area, and the welding portion surrounds the pole.
  • the outer welding part is welded to the welding area, and the protrusion on the inner pole can also be well inserted into the non-welding area, which improves the operation convenience of the top cover packaged electrode assembly and optimizes the battery structure.
  • the present application also provides a battery, including the above-mentioned cylindrical battery cell.
  • the present application also provides an electrical device, including the above-mentioned battery.
  • Fig. 1 shows a schematic structural diagram of a vehicle according to an embodiment of the present application
  • Fig. 2 shows a cross-sectional view of a cylindrical battery cell in the first embodiment of the present application
  • Fig. 3 shows the sectional view of the top cover in an embodiment of the present application
  • Fig. 4 shows a cross-sectional view of a cylindrical battery cell in the second embodiment of the present application
  • Fig. 5 shows a cross-sectional view of a cylindrical battery cell in a third embodiment of the present application
  • Fig. 6 shows a cross-sectional view of a cylindrical battery cell in a fourth embodiment of the present application
  • Fig. 7 shows a schematic structural view of a raised portion in an embodiment of the present application
  • Fig. 8 shows a cross-sectional view at A-A in Fig. 7 .
  • Vehicle 1. Vehicle; 10. Battery; 100. Cylindrical battery cell; 110. Electrode assembly; 111. Tab; 1111. Non-welding area; 1112. Welding area; 112. Center hole; 120. Top cover; 121. Pole Column; 1211, liquid injection hole; 1212, liquid storage cavity; 122, welding part; 123, groove; 130, raised part; 131, tip part; 132, connecting part; Inlet; 1332, diversion outlet; 140, bottom case; 150, packaging space; 20, motor; 30, controller.
  • multiple refers to more than two (including two), similarly, “multiple groups” refers to more than two groups (including two), and “multiple pieces” refers to More than two pieces (including two pieces).
  • the manufacturing process of cylindrical batteries includes: directly welding the tabs of the electrode assembly to the top cover, so that the top cover can be used to package the electrode assembly, and the top cover can be used as a current collector. In this way, the battery structure can be saved and the battery structure can be simplified. Assembly process, however, the conventional cylindrical battery has poor flow capacity.
  • the inventors of the present application have found through research that the reason for the poor flow capacity of traditional cylindrical batteries is that in traditional cylindrical batteries, poles are provided on the top cover, and the area of the part of the electrode assembly corresponding to the pole is relatively small. Large, but this part cannot be welded to the pole, and during the use of the cylindrical battery, the cylindrical battery may vibrate up and down with the use of the car, resulting in fluctuations in the contact area between this part and the pole, which will affect the contact area , will also lead to a reduction in the flow area, which in turn leads to poor flow capacity of the traditional cylindrical battery.
  • the inventors of the present application have designed a cylindrical battery cell after in-depth research, which can weld the tabs of the electrode assembly to the top cover to utilize the top cover.
  • the cover encapsulates the electrode assembly, so that the top cover also functions as a current collector, which can optimize the battery structure and simplify the assembly process.
  • the contact area between the pole and the electrode assembly can be increased, so that the flow capacity of the cylindrical battery cell can be improved.
  • the cylindrical battery cells and/or batteries disclosed in the embodiments of the present application can be used, but not limited, in electric devices such as vehicles, ships or aircrafts.
  • Electric devices can be but not limited to mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc.
  • electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric boat toys, electric airplane toys, etc.
  • spacecraft may include airplanes, rockets, space shuttles, spaceships, etc.
  • a power supply system composed of the cylindrical battery cells and/or batteries disclosed in the present application can be used to form the electric device, so that it is convenient to provide electric drive for the electric device.
  • FIG. 1 is a schematic structural diagram of a vehicle 1 provided by some embodiments of the present application.
  • the vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle.
  • the interior of the vehicle 1 is provided with a battery 10 , and the battery 10 may be provided at the bottom, head or tail of the vehicle 1 .
  • the battery 10 can be used for power supply of the vehicle 1 , for example, the battery 10 can be used as an operating power source of the vehicle 1 .
  • the vehicle 1 may further include a controller 20 and a motor 30 , the controller 20 is used to control the battery 10 to supply power to the motor 30 , for example, to meet the power requirements for starting, navigating and driving of the vehicle 1 .
  • the battery 10 can not only be used as an operating power source for the vehicle 1 , but can also be used as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .
  • a battery 10 provided by an embodiment of the present application includes a cylindrical battery cell 100 .
  • FIG. 2 shows a schematic structural diagram of a cylindrical battery cell 100 in an embodiment of the present application.
  • a cylindrical battery cell 100 provided by an embodiment of the present application includes an electrode assembly 110 , a top cover 120 and a plurality of protrusions 130 .
  • the electrode assembly 110 has a tab 111 , and the tab 111 includes a non-welding area 1111 and a welding area 1112 .
  • the top cover 120 is provided with a pole 121 and a welding portion 122, wherein the welding portion 122 is welded to the welding area 1112, and at least part of the bottom end of the pole 121 is in contact with the non-welding area 1111, so that the electrode assembly 110 can be connected to the pole 121
  • the top cover 120 can be used to package the electrode assembly 110 , and the top cover 120 also functions as a current collector, which can more effectively transmit the current on the electrode piece of the electrode assembly 110 to the pole 121 .
  • a plurality of protrusions 130 are disposed on a side of the pole 121 facing the electrode assembly 110 , and are at least partially inserted into the non-welding area 1111 of the pole 111 .
  • the electrode assembly 110 includes a positive electrode sheet and a negative electrode sheet with a blank area, and the positive electrode sheet, the negative electrode sheet, and the separator are stacked and wound to form the electrode assembly 110, and the positive electrode sheet and the negative electrode sheet are respectively The blank area is flattened to form corresponding tabs 111 .
  • the deepest insertion height of the raised portion 130 is less than or equal to the thickness of the flattened area of the positive electrode sheet or the negative electrode sheet.
  • the protruding part 130 is connected to the non-welded area 1111 of the tab 111 by mechanical insertion. On the one hand, it can increase the flow area of the cylindrical battery cell 100 and improve the flow capacity of the cylindrical battery cell 100. On the one hand, the bonding fastness between the top cover 120 and the electrode assembly 110 can be improved, the fatigue resistance of the welding area 1112 can be improved, and the connection reliability between the top cover 120 and the electrode assembly 110 can be improved.
  • the end of the protruding portion 130 away from the pole 121 is provided with a tip portion 131 for inserting into the non-welding area 1111 of the tab 111 .
  • the tip portion 131 of the protruding portion 130 is used to be plugged into the non-welding area 1111 of the tab 111 .
  • the protruding portion 130 is provided with a connecting portion 132 connected to the pole 121 and opposite to the tip portion 131 at one end of the protruding portion 130 close to the pole 121 , and the protruding portion 130 and the pole 121 are integrally formed. , the overall structural strength of the protruding portion 130 and the pole 121 can be improved, so as to improve the bonding fastness of the top cover 120 and the electrode assembly 110 .
  • the protruding portion 130 is made of metal material, so that the tip portion 131 can be better inserted into the non-welding area 1111 of the tab 111 .
  • the shape of the protruding portion 130 can be tetrahedron, cylinder or hexahedron, etc., which can be plugged into the non-welding area 1111 of the tab 111 , and the structure of the protruding portion 130 is not limited thereto. Different structures can be selected according to requirements and processes to improve process compatibility.
  • the pole 121 has a cylindrical structure, and a plurality of protrusions 130 are arranged in a ring around the centerline of the pole 121 and are spaced apart from each other.
  • the plurality of protrusions 130 can be used to increase the flow area of the cylindrical battery cell 100 and improve the bonding fastness between the top cover 120 and the electrode assembly 110 along the circumferential direction.
  • the pole 121 has a cylindrical structure, and a plurality of protrusions 130 are arranged around the center line of the pole 121 to form a plurality of groups of protrusions arranged at intervals in the radial direction.
  • Each protrusion group includes a plurality of protrusions 130 arranged in a ring around the centerline of the pole 121 and spaced apart from each other. The farther away from the centerline of the pole 121, the higher the height of the protrusions 130 Small.
  • the height of the raised portion 130 refers to the dimension of the raised portion 130 along the centerline direction of the pole 121 .
  • the plurality of protrusions 130 can be used to increase the flow area of the cylindrical battery cell 100 and improve the bonding fastness between the top cover 120 and the electrode assembly 110 along the circumferential direction.
  • the welding portion 122 on the top cover 120 is welded to the welding area 1112 of the pole lug 111, in order to avoid the protrusion 130 closer to the welding portion 122 from affecting the welding of the welding portion 122 and the welding area 1112, the distance from the pole post 121
  • the height of the protruding portion 130 that is farther from the center line is smaller, reducing the influence of the protruding portion 130 on the flatness of the welding area 1112, so that the welding portion 122 on the top cover 120 can be welded to the welding area of the tab 111 smoothly 1112.
  • the electrode assembly 110 further includes a central hole 112 , and the protrusion 130 near the centerline of the pole 121 protrudes into the central hole 112 of the electrode assembly 110 .
  • the protruding part 130 protruding into the central hole 112 of the electrode assembly 110 can be used to support the electrode assembly 110, which means that the electrode assembly 110 surrounds the protruding part 130, preventing the cylindrical battery cell 100 from being damaged during use.
  • the collapse caused by factors such as excessive expansion force can avoid affecting the interface of the inner ring pole piece, and can improve the safety of the cylindrical battery cell 100 .
  • the plurality of protrusions 130 are annular structures coaxial with the pole 121 , and the plurality of protrusions 130 are arranged at intervals along the radial direction of the pole 121 , close to the centerline of the pole 121 The protrusion 130 protrudes into the central hole 112 of the electrode assembly 110 .
  • the central hole 112 of the electrode assembly 110 can also be supported by the protrusion 130 protruding into the central hole 112 of the electrode assembly 110 , so as to improve the safety and reliability of the cylindrical battery cell 100 .
  • the portion of the upper surface of the top cover 120 corresponding to the welding portion 122 is provided with a groove 123 with a preset depth, so that the welding portion 122 can pass through. It is assumed to be welded to the welding area 1112 .
  • the welding part 122 is connected to the welding area 1112 by means of penetration welding, and the operation of penetration welding is usually carried out within a certain depth range to ensure the firmness of the welding.
  • the portion of the top cover 120 corresponding to the welding portion 122 can be provided with a groove 123 with a preset depth, so that the welding portion 122 can pass through and be welded to the welding area 1112.
  • a liquid injection hole 1211 is provided on the pole 121, and a liquid storage chamber 1212 is provided on the side of the pole 121 facing the electrode assembly 110, and the liquid storage chamber 1212 and the liquid injection hole 1211 is connected.
  • the liquid injection hole 1211 is used for allowing the electrolyte solution to enter the interior of the cylindrical battery cell 100 from the outside of the cylindrical battery cell 100 .
  • the external electrolyte can enter the inside of the electrode assembly 110 through the liquid injection hole 1211 and the liquid storage chamber 1212 , which is beneficial to further increase the infiltration speed of the electrolyte.
  • the raised portion 130 is provided with a guide channel 133 that communicates with the liquid storage chamber 1212 at one end, and the other end of the guide channel 133 is disposed on the raised portion 133 .
  • the raised portion 130 is inserted into a portion of the non-welding region 1111 .
  • the diversion channel 133 has a diversion inlet 1331 communicating with the liquid storage chamber 1212, and a diversion outlet 1332 corresponding to the diversion inlet 1331, and the diversion outlet 1332 is arranged at the place where the protrusion 130 is inserted into the non-welding area 1111 part.
  • the electrolyte flowing into the liquid storage chamber 1212 can be diverted to the non-welding area 1111 of the tab 111 through the flow guide channel 133, so that the electrolyte can flow into the electrode assembly 110 between the pole piece layers more smoothly, further improving the strength of the electrolyte. flow capacity.
  • the gap between the protrusion 130 and the tab 111 can increase the flow space of the electrolyte, improve the wettability of the electrolyte between the pole piece layers, and at the same time allow the gas generated inside the electrode assembly 110 to be discharged faster, which is beneficial to improve
  • the pole piece interface also enables the gas generated inside the electrode assembly 110 of the cylindrical battery cell 100 to be quickly removed under abnormal conditions such as abuse, so as to avoid the blockage of the explosion-proof valve and improve the safety of the cylindrical battery cell 100 .
  • the tab 111 of the electrode assembly 110 is formed under the kneading operation, and the part of the tab 111 farther away from the pole 121 is looser, that is, the lower part of the tab 111 is looser, making the protrusion
  • the guide channel 133 can alleviate the resistance of the flattened and compacted part of the tab 111 to the flow of the electrolyte into the layered winding structure.
  • the welding area 1112 surrounds the non-welding area 1111
  • the welding portion 122 surrounds the pole 121 .
  • the outer welding portion 122 is welded to the welding area 1112, and the raised portion 130 on the inner pole 121 can also be well inserted into the non-welding area 1111, which improves the operation convenience of the top cover 120 packaging the electrode assembly 110,
  • the battery structure can also be optimized.
  • the cylindrical battery cell 100 further includes a bottom case 140 connected to the top cover 120 , and the top cover 120 and the bottom case 140 define a packaging space 150 , the electrode assembly 110 is packaged in the packaging space 150 .
  • the cylindrical battery cell 100 includes an electrode assembly 110 , a top cover 120 and a plurality of protrusions 130 .
  • the end of the protrusion 130 away from the pole 121 is provided with a tip 131 for insertion into the non-welding area 1111 of the tab 111 , the pole 121 is provided with a liquid injection hole 1211 , and the side of the pole 121 faces the electrode assembly 110 A liquid storage chamber 1212 is provided, and the liquid storage chamber 1212 communicates with the liquid injection hole 1211 .
  • the diversion channel 133 has a diversion inlet 1331 communicating with the liquid storage cavity 1212 , and a diversion outlet 1332 corresponding to the diversion inlet 1331 , and the diversion outlet 1332 is provided at the part where the protrusion 130 is inserted into the non-welding area 1111 .
  • the protrusion 130 is mechanically inserted into contact with the non-welding area 1111 of the tab 111, which can increase the flow area of the cylindrical battery cell 100 and improve the flow capacity of the cylindrical battery cell 100. , and the connection reliability between the top cover 120 and the electrode assembly 110 can be improved.
  • the electrolyte flowing into the liquid storage chamber 1212 can be diverted to the non-welding area 1111 of the tab 111 through the flow guide channel 133, so that the electrolyte can flow into the pole piece layer of the electrode assembly 110 more smoothly, further improving the level of the electrolyte.
  • the gas generated inside the electrode assembly 110 can be discharged faster, which is beneficial to improve the pole piece interface, and can also be abused in the cylindrical battery cell 100 Avoid blocking the explosion-proof valve under abnormal conditions, so as to improve the safety of the cylindrical battery cell 100 .
  • the battery 10 provided by an embodiment of the present application includes the above-mentioned cylindrical battery cell 100 .
  • a battery 10 with better overcurrent capability can be obtained.
  • the number of cylindrical battery cells 100 included in the battery 10 may be one or more.
  • the battery 10 can be a battery module or a battery pack.
  • the cylindrical battery cells 100 are connected in series, in parallel or in parallel to achieve greater capacity or power.
  • An electrical device provided by an embodiment of the present application includes the above-mentioned battery 10 .

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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

本申请涉及一种圆柱型电池单体(100)、电池(10)和用电装置。一种圆柱型电池单体(100)，包括电极组件(110)、顶盖(120)以及多个凸起部(130)。电极组件(110)具有极耳(111)，极耳(111)包括非焊接区域(1111)和焊接区域(1112)。顶盖(120)设置有极柱(121)和焊接部(122)，焊接部(122)焊接于焊接区域(1112)，且极柱(121)的底端的至少部分与非焊接区域(1111)接触，以使电极组件(110)能够与极柱(121)电性连接。多个凸起部(130)设置于极柱(121)朝向电极组件(110)的一侧，且至少部分插接于极耳(111)的非焊接区域(1111)。一方面，可提高圆柱型电池单体的过流面积，提升圆柱型电池单体(100)的过流能力，另一方面，可提高顶盖(120)和电极组件(110)的结合牢度，提高焊接区域(1112)的耐疲劳程度，进而提高顶盖(120)和电极组件(110)的连接可靠性。

Description

圆柱型电池单体、电池和用电装置
交叉引用
本申请引用于2022年02月28日递交的名称为“圆柱型电池单体、电池和用电装置”的第202220409836.7号中国专利申请，其通过引用被全部并入本申请。
技术领域
本申请涉及电池技术领域，特别是涉及圆柱型电池单体、电池和用电装置。
背景技术
相关技术中，圆柱电池的制造过程包括：将电极组件的极耳直接与顶盖焊接，以利用顶盖封装电极组件，且顶盖可用作集流体，如此，可节省空间优化电池结构，简化装配工艺，然而，该传统的圆柱电池的过流能力较差。
发明内容
基于此，有必要针对传统的圆柱电池的过流能力较差的问题，提供一种圆柱型电池单体、电池和用电装置。
第一方面，本申请提供了一种圆柱型电池单体，包括电极组件、顶盖以及多个凸起部。电极组件具有极耳，极耳包括非焊接区域和焊接区域。顶盖设置有极柱和焊接部，焊接部焊接于焊接区域，且极柱的底端的至少部分与非焊接区域接触，以使电极组件能够与极柱电性连接。多个凸起部设置于极柱朝向电极组件的一侧，且至少部分插接于极耳的非焊接区域。
本申请的技术方案中，凸起部通过机械插入的方式与极耳的非焊接区域接触连接，一方面，可提高圆柱型电池单体的过流面积，提升圆柱型电池单体的过流能力，另一方面，可提高顶盖和电极组件的结合牢度，提高焊接区域的耐疲劳程度，进而提高顶盖和电极组件的连接可靠性。
在其中一个实施例中，凸起部远离极柱的一端设有用于插接于极耳的非焊接区域的尖端部。便于更好地将凸起部插接于极耳的非焊接区域，进而提高圆柱型电池单体的过流面积，且提高顶盖和电极组件的结合牢度。
在其中一个实施例中，极柱呈柱体结构，多个凸起部围绕极柱的中心线呈环形排布且彼此间隔设置。可利用多个凸起部提高圆柱型电池单体的过流面积，且提高顶盖和电极组件沿环向方向的结合牢度。
在其中一个实施例中，极柱呈柱体结构，多个凸起部围绕极柱的中心线排布形成沿径 向间隔设置的多组凸起部组，每一凸起部组包括围绕极柱的中心线呈环形排布且彼此间隔的多个凸起部。距极柱的中心线越远的凸起部的高度越小。上述设计能够减少凸起部对焊接区域的平面度的影响，以使顶盖上的焊接部能够平整地焊接于极耳的焊接区域。
在其中一个实施例中，电极组件还包括中心孔，靠近极柱的中心线的凸起部伸入电极组件的中心孔内。可利用伸入电极组件的中心孔内的凸起部对电极组件起支撑作用，相当于电极组件围绕于该凸起部，避免圆柱型电池单体在使用过程中因膨胀力过大等因素影响而发生塌陷，避免影响内圈极片界面，能提高圆柱型电池单体的安全性。
在其中一个实施例中，顶盖的上表面对应于焊接部的部分设有预设深度的凹槽，以使焊接部能够穿设而焊接于焊接区域。便于焊接部采用穿透焊接的方式连接于焊接区域，穿透焊接的作业通常在一定深度范围内进行作业，设置的凹槽可保证焊接的牢固性。
在其中一个实施例中，极柱上设有注液孔，极柱朝向电极组件的一侧设有储液腔，储液腔与注液孔相连通。外部的电解液可通过注液孔和储液腔进入电极组件内部，有利于进一步提升电解液的浸润速度。
在其中一个实施例中，凸起部设有一端与储液腔相连通的导流通道，导流通道的另一端设置于凸起部插入非焊接区域的部分。流入储液腔内的电解液能够通过导流通道导流至极耳的非焊接区域，使电解液能够更顺畅地流入电极组件的极片层间，进一步提升电解液的过流能力。另外，且凸起部与极耳的间隙能够增加电解液的流动空间，提高极片层间的电解液浸润性，同时使得电极组件内部产生的气体可以更快地排出，以提高圆柱型电池单体的安全性。
在其中一个实施例中，焊接区域围绕于非焊接区域，焊接部围绕于极柱。如此，外侧的焊接部焊接于焊接区域，内侧的极柱上的凸起部也能很好地插接于非焊接区域，提高顶盖封装电极组件的操作便利性，也能优化电池结构。
第二方面，本申请还提供了一种电池，包括上述的圆柱型电池单体。
第三方面，本申请还提供了一种用电装置，包括上述的电池。
附图说明
通过阅读对下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本申请的限制。而且在全部附图中，用相同的附图标号表示相同的部件。在附图中：
图1示出了本申请一实施例的一种车辆的结构示意图；
图2示出了本申请第一实施例中的圆柱型电池单体的剖视图；
图3示出了本申请一实施例中的顶盖的剖视图；
图4示出了本申请第二实施例中的圆柱型电池单体的剖视图；
图5示出了本申请第三实施例中的圆柱型电池单体的剖视图；
图6示出了本申请第四实施例中的圆柱型电池单体的剖视图；
图7示出了本申请一实施例中的凸起部的结构示意图；
图8示出了图7中A-A处的剖视图。
1、车辆；10、电池；100、圆柱型电池单体；110、电极组件；111、极耳；1111、非焊接区域；1112、焊接区域；112、中心孔；120、顶盖；121、极柱；1211、注液孔；1212、储液腔；122、焊接部；123、凹槽；130、凸起部；131、尖端部；132、连接部；133、导流通道；1331、导流进口；1332、导流出口；140、底壳；150、封装空间；20、马达；30、控制器。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，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、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
在本申请实施例的描述中，技术术语“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”“轴向”“径向”“周向”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实施例和简化描述，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实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
相关技术中，圆柱电池的制造过程包括：将电极组件的极耳直接与顶盖焊接，以利用顶盖封装电极组件，且顶盖可用作集流体，如此，可节省空间优化电池结构，简化装配工艺，然而，该传统的圆柱电池的过流能力较差。
本申请的发明人经过研究发现，传统的圆柱电池的过流能力较差的原因在于：传统的圆柱电池中，顶盖设有极柱，电极组件的极耳对应于极柱的部分的面积较大，但该部分无法与极柱进行焊接，而在圆柱电池使用过程中，圆柱电池可能会随车使用而出现上下振动，导致该部分与极柱的接触面积的大小出现波动，会影响接触面积，也会导致过流面积减少，进而导致该传统的圆柱电池的过流能力较差。
为了解决传统的圆柱电池的过流能力较差的问题，本申请的发明人经过深入研究，设计了一种圆柱型电池单体，既能使电极组件的极耳与顶盖焊接，以利用顶盖封装电极组件，使得顶盖兼具集流体的作用，可优化电池结构，简化装配工艺，同时，顶盖上的极柱朝向电极组件一侧设有凸起部，可使凸起部插接于极耳未与顶盖焊接的部分，进而能提高极柱与电极组件的接触面积，如此，可提高圆柱型电池单体的过流能力。
本申请实施例公开的圆柱型电池单体和/或电池可以但不限用于车辆、船舶或飞行器等用电装置中。用电装置可以为但不限于手机、平板、笔记本电脑、电动玩具、电动工具、电瓶车、电动汽车、轮船、航天器等等。其中，电动玩具可以包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等，航天器可以包括飞机、火箭、航天飞机和宇宙飞船等等。可以使用具备本申请公开的圆柱型电池单体和/或电池等组成该用电装置的电源系统，这样，便于为用电装置提供电力驱动。
请参照图1，图1为本申请一些实施例提供的车辆1的结构示意图。车辆1可以为燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等。车辆1的内部设置有电池10，电池10可以设置在车辆1的底部或头部或尾部。电池10可以用于车辆1的供电，例如，电池10可以作为车辆1的操作电源。车辆1还可以包括控制器20和马达30，控制器20用来控制电池10为马达30供电，例如，用于车辆1的启动、导航和行驶时的工作用电需求。
在本申请一些实施例中，电池10不仅可以作为车辆1的操作电源，还可以作为车辆1的驱动电源，代替或部分地代替燃油或天然气为车辆1提供驱动动力。
本申请一实施例提供的电池10包括圆柱型电池单体100。
图2示出了本申请一实施例中的圆柱型电池单体100的结构示意图。
在本申请的一些实施例中，请参阅图2，本申请一实施例提供的圆柱型电池单体100，包括电极组件110、顶盖120以及多个凸起部130。
电极组件110具有极耳111，极耳111包括非焊接区域1111和焊接区域1112。顶盖120设置有极柱121和焊接部122，其中，焊接部122焊接于焊接区域1112，且极柱121的底端的至少部分与非焊接区域1111接触，以使电极组件110能够与极柱121电性连接，可利用顶盖120封装电极组件110，且顶盖120兼具集流体的作用，能够更有效地将电极组件110的极片上的电流输送至极柱121。多个凸起部130设置于极柱121朝向电极组件110的一侧，且至少部分插接于极耳111的非焊接区域1111。
在本申请的一些实施例中，电极组件110包括具有留白区域的正极片和负极片，将正极片、负极片和隔离膜层叠并卷绕形成电极组件110，分别对正极片和负极片的留白区域进行揉平，以形成对应的极耳111。
凸起部130的插入最深高度小于或等于正极片或负极片的揉平区厚度。
凸起部130通过机械插入的方式与极耳111的非焊接区域1111接触连接，一方面，可提高圆柱型电池单体100的过流面积，提升圆柱型电池单体100的过流能力，另一方面，可提高顶盖120和电极组件110的结合牢度，提高焊接区域1112的耐疲劳程度，进而提高顶盖120和电极组件110的连接可靠性。
在本申请的一些实施例中，请参阅图2及图3，凸起部130远离极柱121的一端设有用于插接于极耳111的非焊接区域1111的尖端部131。
也就是说，凸起部130的尖端部131用于插接于极耳111的非焊接区域1111。
在一些实施例中，请参阅图3，凸起部130靠近极柱121的一端设有连接于极柱121且与尖端部131相对设置的连接部132，凸起部130和极柱121一体成型，可提高凸起部130和极柱121的整体结构强度，以便提高顶盖120和电极组件110的结合牢度。
在一些实施例中，凸起部130为金属材料，以使尖端部131能更好地插接于极耳111的非焊接区域1111。
在一些实施例中，凸起部130的形状可以是四面体，柱体或六面体等能够插接于极耳111的非焊接区域1111的结构，凸起部130的结构并不局限于此。可以根据需求和工艺等选择不同的结构，以提高工艺的兼容性。
通过在凸起部130上设置尖端部131，便于更好地将凸起部130插接于极耳111的非焊接区域1111，进而提高圆柱型电池单体100的过流面积，且提高顶盖120和电极组件110的结合牢度。
在本申请的一些实施例中，请参阅图2及图3，极柱121呈柱体结构，多个凸起部130 围绕极柱121的中心线呈环形排布且彼此间隔设置。
可利用多个凸起部130提高圆柱型电池单体100的过流面积，且提高顶盖120和电极组件110沿环向方向的结合牢度。
在本申请的一些实施例中，请参阅图3及图4，极柱121呈柱体结构，多个凸起部130围绕极柱121的中心线排布形成沿径向间隔设置的多组凸起部组，每一凸起部组包括围绕极柱121的中心线呈环形排布且彼此间隔的多个凸起部130，距极柱121的中心线越远的凸起部130的高度越小。
可以理解，凸起部130的高度是指凸起部130沿极柱121的中心线方向的尺寸。
可利用多个凸起部130提高圆柱型电池单体100的过流面积，且提高顶盖120和电极组件110沿环向方向的结合牢度。同时，由于顶盖120上的焊接部122焊接于极耳111的焊接区域1112，为了避免更靠近焊接部122的凸起部130影响焊接部122和焊接区域1112的焊接，使距极柱121的中心线越远的凸起部130的高度越小，减少凸起部130对焊接区域1112的平面度的影响，以使顶盖120上的焊接部122能够平整地焊接于极耳111的焊接区域1112。
在本申请的一些实施例中，请参阅图5，电极组件110还包括中心孔112，靠近极柱121的中心线的凸起部130伸入电极组件110的中心孔112内。
可利用伸入电极组件110的中心孔112内的凸起部130对电极组件110起支撑作用，相当于电极组件110围绕于该凸起部130，避免圆柱型电池单体100在使用过程中因膨胀力过大等因素影响而发生塌陷，避免影响内圈极片界面，能提高圆柱型电池单体100的安全性。
在另一些实施例中，多个凸起部130为与极柱121同轴的环状结构，且多个凸起部130沿极柱121的径向间隔设置，靠近极柱121的中心线的凸起部130伸入电极组件110的中心孔112内。
如此，也可利用伸入电极组件110的中心孔112的凸起部130对电极组件110的中心孔112起到支撑作用，以提升圆柱型电池单体100的安全可靠性。
在本申请的一些实施例中，请参阅图2、图4及图5，顶盖120的上表面对应于焊接部122的部分设有预设深度的凹槽123，以使焊接部122能够穿设而焊接于焊接区域1112。
可以理解，焊接部122采用穿透焊接的方式连接于焊接区域1112，而穿透焊接的作业通常在一定深度范围内进行作业，以保证焊接的牢固性。
如此，为了保证焊接部122更好地焊接于焊接区域1112，可使顶盖120对应于焊接部122的部分设置预设深度的凹槽123，以使焊接部122能够穿设而焊接于焊接区域1112。
通过在焊接部122上设置凹槽123，保证顶盖120与极耳111的焊接牢度。
在本申请的一些实施例中，请参阅图6，极柱121上设有注液孔1211，极柱121朝向电极组件110的一侧设有储液腔1212，储液腔1212与注液孔1211相连通。
其中，注液孔1211用于供电解液从圆柱型电池单体100的外部进入到圆柱型电池单 体100的内部。
如此，外部的电解液可通过注液孔1211和储液腔1212进入电极组件110内部，有利于进一步提升电解液的浸润速度。
在本申请的一些实施例中，请参阅图6、图7及图8，凸起部130设有一端与储液腔1212相连通的导流通道133，导流通道133的另一端设置于凸起部130插入非焊接区域1111的部分。
可以理解，导流通道133具有与储液腔1212相连通的导流进口1331，以及相对于导流进口1331的导流出口1332，导流出口1332设置于凸起部130插入非焊接区域1111的部分。
如此，流入储液腔1212内的电解液能够通过导流通道133导流至极耳111的非焊接区域1111，使电解液能够更顺畅地流入电极组件110的极片层间，进一步提升电解液的过流能力。另外，且凸起部130与极耳111的间隙能够增加电解液的流动空间，提高极片层间的电解液浸润性，同时使得电极组件110内部产生的气体可以更快地排出，有利于改善极片界面，也使圆柱型电池单体100在滥用等异常情况下电极组件110内部产生的气体能快速排除，避免防爆阀堵塞，以提高圆柱型电池单体100的安全性。
需要补充的是，电极组件110的极耳111是在揉平作业下形成的，极耳111距离极柱121越远的部分越松散，即极耳111越靠下的部分越松散，使得凸起部130的下端与电极组件110的极片之间存在间隙，可增加电解液的流动空间，以提高极片层间的电解液浸润性，也有利于电极组件110内部产生的气体快速排除。
可以理解的是，该导流通道133能够缓解极耳111被揉平压实的部分对电解液向层状卷绕结构内部流通的阻碍。
在本申请的一些实施例中，请参阅图2、图4及图5，焊接区域1112围绕于非焊接区域1111，焊接部122围绕于极柱121。
如此，外侧的焊接部122焊接于焊接区域1112，内侧的极柱121上的凸起部130也能很好地插接于非焊接区域1111，提高顶盖120封装电极组件110的操作便利性，也能优化电池结构。
在本申请的一些实施例中，请参阅图2、图4及图5，圆柱型电池单体100还包括与顶盖120相连的底壳140，顶盖120和底壳140界定出封装空间150，电极组件110封装于该封装空间150内。
在一些实施例中，请参阅图6、图7及图8，圆柱型电池单体100，包括电极组件110、顶盖120以及多个凸起部130。凸起部130远离极柱121的一端设有用于插接于极耳111的非焊接区域1111的尖端部131，极柱121上设有注液孔1211，极柱121朝向电极组件110的一侧设有储液腔1212，储液腔1212与注液孔1211相连通。导流通道133具有与储液腔1212相连通的导流进口1331，以及相对于导流进口1331的导流出口1332，导流出口1332设置于 凸起部130插入非焊接区域1111的部分。
如此，一方面，凸起部130通过机械插入的方式与极耳111的非焊接区域1111接触连接，可提高圆柱型电池单体100的过流面积，提升圆柱型电池单体100的过流能力，且可提高顶盖120和电极组件110的连接可靠性。另一方面，流入储液腔1212内的电解液能够导流通道133导流至极耳111的非焊接区域1111，使电解液能够更顺畅地流入电极组件110的极片层间，进一步提升电解液的过流能力，也能提高极片层间的电解液浸润性，同时使得电极组件110内部产生的气体可以更快地排出，有利于改善极片界面，也能在圆柱型电池单体100滥用等异常情况下避免防爆阀堵塞，以提高圆柱型电池单体100的安全性。
在本申请的一些实施例中，本申请一实施例提供的电池10，包括上述的圆柱型电池单体100。能获得过流能力较佳的电池10。电池10包含的圆柱型电池单体100数量可以是一个也可以是多个。电池10可以是电池模组也可以是电池包。圆柱型电池单体100间通过串联、并联或混联的方式连接以实现较大的容量或功率。
本申请一实施例提供的用电装置，包括上述的电池10。
以上所述实施例的各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各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (11)

  1. 一种圆柱型电池单体，包括：
    电极组件(110)，具有极耳(111)，所述极耳(111)包括非焊接区域(1111)和焊接区域(1112)；
    顶盖(120)，设置有极柱(121)和焊接部(122)；所述焊接部(122)焊接于所述焊接区域(1112)，且所述极柱(121)的底端的至少部分与所述非焊接区域(1111)接触，以使所述电极组件(110)能够与所述极柱(121)电性连接；以及
    多个凸起部(130)，设置于所述极柱(121)朝向所述电极组件(110)的一侧，且至少部分插接于所述极耳(111)的所述非焊接区域(1111)。
  2. 根据权利要求1所述的圆柱型电池单体，其中，所述凸起部(130)远离所述极柱(121)的一端设有用于插接于所述极耳(111)的所述非焊接区域(1111)的尖端部(131)。
  3. 根据权利要求1或2所述的圆柱型电池单体，其中，所述极柱(121)呈柱体结构；
    所述多个凸起部(130)围绕所述极柱(121)的中心线呈环形排布且彼此间隔设置。
  4. 根据权利要求1-3所述的圆柱型电池单体，其中，所述极柱(121)呈柱体结构；
    所述多个凸起部(130)围绕所述极柱的中心线排布形成沿径向间隔设置的多组凸起部组，每一所述凸起部组包括围绕所述极柱(121)的中心线呈环形排布且彼此间隔的多个所述凸起部(130)；
    距所述极柱(121)的中心线越远的所述凸起部(130)的高度越小。
  5. 根据权利要求1-4所述的圆柱型电池单体，其中，所述电极组件(110)还包括中心孔(112)；靠近所述极柱(121)的中心线的所述凸起部(130)伸入所述电极组件(110)的中心孔(112)内。
  6. 根据权利要求1-5所述的圆柱型电池单体，其中，所述顶盖(120)的上表面对应于所述焊接部(122)的部分设有预设深度的凹槽(123)，以使所述焊接部(122)能够穿设而焊接于所述焊接区域(1112)。
  7. 根据权利要求1-6任一项所述的圆柱型电池单体，其中，所述极柱(121)上设有注液孔(1211)；
    所述极柱(121)朝向所述电极组件(110)的一侧设有储液腔(1212)，所述储液腔(1212)与所述注液孔(1211)相连通。
  8. 根据权利要求7所述的圆柱型电池单体，其中，所述凸起部(130)设有一端与所述储液腔(1212)相连通的导流通道(133)，所述导流通道(133)的另一端设置于所述凸起部(130)插入所述非焊接区域(1111)的部分。
  9. 根据权利要求1-8所述的圆柱型电池单体，其中，所述焊接区域(1112)围绕于所述非焊接区域(1111)；
    所述焊接部(122)围绕于所述极柱(121)。
  10. 一种电池，包括如权利要求1-9任一项所述的圆柱型电池单体(100)。
  11. 一种用电装置，包括如权利要求10所述的电池(10)。
PCT/CN2022/091949 2022-02-28 2022-05-10 圆柱型电池单体、电池和用电装置 WO2023159772A1 (zh)

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CN113871803A (zh) * 2021-09-01 2021-12-31 多氟多新能源科技有限公司 一种采用非焊接导电连接的圆柱电芯及其制备方法

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KR20180041019A (ko) * 2016-10-13 2018-04-23 주식회사 엘지화학 용접성이 향상된 돌기부가 형성되어 있는 원통형 이차전지
CN113871803A (zh) * 2021-09-01 2021-12-31 多氟多新能源科技有限公司 一种采用非焊接导电连接的圆柱电芯及其制备方法

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