WO2024098425A1 - 储能装置、用电设备以及卷绕方法 - Google Patents

储能装置、用电设备以及卷绕方法 Download PDF

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Publication number
WO2024098425A1
WO2024098425A1 PCT/CN2022/131549 CN2022131549W WO2024098425A1 WO 2024098425 A1 WO2024098425 A1 WO 2024098425A1 CN 2022131549 W CN2022131549 W CN 2022131549W WO 2024098425 A1 WO2024098425 A1 WO 2024098425A1
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WIPO (PCT)
Prior art keywords
pole ear
pole
electrode sheet
shaped notch
energy storage
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Application number
PCT/CN2022/131549
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English (en)
French (fr)
Inventor
梁金云
张亮亮
张万财
阳明
Original Assignee
深圳海润新能源科技有限公司
厦门海辰储能科技股份有限公司
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Application filed by 深圳海润新能源科技有限公司, 厦门海辰储能科技股份有限公司 filed Critical 深圳海润新能源科技有限公司
Priority to PCT/CN2022/131549 priority Critical patent/WO2024098425A1/zh
Publication of WO2024098425A1 publication Critical patent/WO2024098425A1/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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/531—Electrode connections inside a battery casing
    • H01M50/538—Connection of several leads or tabs of wound or folded electrode stacks
    • 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 field of energy storage, and in particular to an energy storage device, an electrical equipment and a winding method.
  • the positive electrode sheet, separator and negative electrode sheet need to be stacked and wound to form a core, and then two or more cores are connected in series or in parallel to form a battery cell.
  • the position of the winding completion needs to be manually determined during the cell winding process, and winding automation cannot be achieved.
  • the present application provides an energy storage device, an electrical equipment and a winding method to solve the above technical problems.
  • the first aspect of the present application provides an energy storage device, including an electrode sheet and a diaphragm, which are stacked and wound to form a bare battery cell; the electrode sheet is connected to a pole ear at one end along its width direction, and the pole ear includes a first pole ear and a second pole ear, and the first pole ear is arranged adjacent to the end of the electrode sheet along its length direction; the first pole ear is provided with a U-shaped notch.
  • a second aspect of the present application provides an electrical device, comprising at least one of the above-mentioned energy storage devices, wherein the energy storage device is used to provide electrical energy.
  • a third aspect of the present application provides a winding method, which is applied to the energy storage device described in the first aspect, and the winding method comprises the following steps:
  • Step 1 stacking the electrode sheet and the separator on a winding machine for winding
  • Step 2 A sensor on the winding machine senses the U-shaped notch on the first pole lug to determine the position of the first pole lug;
  • Step three cutting the electrode sheet along the length direction of the electrode sheet at a position close to the first electrode tab to end the winding.
  • a U-shaped notch is provided on the first pole ear.
  • the U-shaped notch marks the position where the bare cell is wound, and the position where the winding is completed is determined based on the U-shaped notch during the process of winding the electrode sheet to form the bare cell.
  • the position where the bare cell is wound is identified by identifying the U-shaped notch, and the electrode sheet is cut at a position close to the first pole ear to end the winding, without the need to manually determine the winding termination position, thereby realizing winding automation.
  • FIG1 is a schematic diagram of a three-dimensional structure of a battery cell in an embodiment of the present application.
  • FIG2 is a disassembly schematic diagram of FIG1 ;
  • FIG3 is a schematic diagram of the structure of an electrode sheet in the first embodiment of the present application.
  • FIG4 is a partial enlarged schematic diagram of point IV in FIG3 ;
  • FIG5 is a schematic diagram of the structure of a first electrode tab in a second embodiment of the present application.
  • FIG6 is a schematic structural diagram of a first electrode tab in a third embodiment of the present application.
  • FIG7 is a schematic structural diagram of a first electrode tab in a fourth embodiment of the present application.
  • FIG8 is a schematic structural diagram of a first electrode tab in a fifth embodiment of the present application.
  • FIG9 is a schematic structural diagram of a first electrode tab in a sixth embodiment of the present application.
  • FIG10 is a schematic diagram of the structure of the electrode sheet after winding in FIG3 ;
  • FIG11 is a schematic diagram of the three-dimensional structure of a bare cell assembly in one embodiment of the present application.
  • FIG12 is a schematic diagram of the structure of FIG2 after rotating 180 degrees
  • FIG13 is a schematic diagram of the structure after welding of the electrode tab and the adapter in one embodiment of the present application.
  • FIG. 14 is a schematic flow chart of a winding method in one embodiment of the present application.
  • the energy storage device of the present application may be a battery cell, or a battery module, battery pack, battery cluster, or other device having an electric energy storage function including a battery cell.
  • the battery cell 3 shown in FIG. 1 is used as an example for explanation below.
  • the battery cell 3 includes a bare cell 1, a shell 31 and a cover plate 32, wherein the bare cell 1 is formed by stacking and winding the electrode sheet 10 and the diaphragm shown in FIG3 ; as shown in FIG3 , the electrode sheet 10 is connected to a pole ear 11 at one end along its width direction W, and the pole ear 11 includes a first pole ear 13 and a second pole ear 12, wherein the first pole ear 13 is arranged adjacent to the end of the electrode sheet 10 at one end along its length direction L; as shown in FIG4 , a U-shaped notch 130 is arranged on the first pole ear 13.
  • the end of one side of the electrode sheet 10 along its length direction L is the winding end position of the electrode sheet 10 during the winding process.
  • the winding end position of the electrode sheet 10 can be determined during the winding process, and then the corresponding control operation is performed to realize the automation of the winding process.
  • a width direction W and a length direction L are specially defined, wherein the electrode sheet 10 is in the shape of an elongated strip as a whole, and its length dimension is much larger than its width dimension.
  • the width direction W is the width direction of the electrode sheet 10
  • the length direction L is the length direction of the electrode sheet 10, as shown in FIG. 3 .
  • the first pole ear 13 is arranged adjacent to the end of one side of the electrode sheet 10 along its length direction L, which means that the distance between the first pole ear 13 and the end of one side of the electrode sheet 10 along its length direction L is less than a preset distance.
  • a corresponding control instruction can be generated, and the electrode sheet 10 is cut off in response to the control instruction to obtain a bare battery cell 1. There is no need to manually determine the winding end position, thereby realizing winding automation.
  • the first pole ear 13 includes a first end 131 away from the electrode sheet 10, and the first pole ear 13 is cut from its first end 131 to the side close to the electrode sheet 10 to form a U-shaped notch 130, and the size of the U-shaped notch 130 along the length direction L of the electrode sheet 10 is the width of the U-shaped notch 130, and the size of the U-shaped notch 130 along the width direction W of the electrode sheet 10 is the depth of the U-shaped notch 130, and the ratio of the depth to the width of the U-shaped notch 130 is greater than 1.5 and less than 2.
  • the ratio of the depth to the width of the U-shaped notch 130 is limited to be greater than 1.5 and less than 2.
  • the width of the first pole tab 13 is smaller than the width of the second pole tab 12 , the width ratio of the first pole tab 13 to the second pole tab 12 is greater than 0.5 and less than 1, and the width difference between the first pole tab 13 and the second pole tab 12 is greater than or equal to 2 mm.
  • the overall identification of the first pole ear 13 is further improved, and during the winding process of the electrode sheet 10, the identification equipment's identification readiness for the first pole ear 13 is further improved, thereby further improving the qualified rate of the bare battery cell 1 formed by winding the electrode sheet 10, greatly improving the production efficiency.
  • the inner side wall 1301 of the U-shaped notch 130 is connected to the first end 131 of the first pole tab 13 through a first arc 1303.
  • the ratio of the radius of the first arc 1303 to the width of the U-shaped notch 130 is greater than 0.15 and less than 1.2, and the ratio of the radius of the first arc 1303 to the depth of the U-shaped notch 130 is greater than 0.05 and less than 0.15.
  • the processing of the U-shaped notch 130 can be further facilitated, and burrs are not easy to generate.
  • the possibility of metal particles falling from the first pole ear 13 will be greatly reduced. This can avoid the problem of metal particles falling into the bare battery cell 1 and causing a short circuit, and can also avoid the problem of burrs piercing the packaging film of the battery cell and causing leakage.
  • FIG. 5 is a schematic diagram of the structure of the first pole ear in the second embodiment of the present application.
  • the U-shaped notch 130 on the first pole ear 13 is omitted, and along the width direction W of the electrode sheet 10, the width of the first pole ear 13 is smaller than the width of the second pole ear 12, the width ratio of the first pole ear 13 to the second pole ear 12 is greater than 0.5 and less than 1, and the width difference between the first pole ear 13 and the second pole ear 12 is greater than or equal to 2 mm.
  • the processing technology of the first pole ear 13 can be further simplified, and because the width of the first pole ear 13 is smaller than the width of the second pole ear 12, the width ratio of the first pole ear 13 to the second pole ear 12 is greater than 0.5 and less than 1, and the width difference between the first pole ear 13 and the second pole ear 12 is greater than or equal to 2 mm, it still has a certain degree of identification accuracy and can simplify the production process.
  • the width of the first pole ear 13 is smaller than the width of the second pole ear 12
  • the width ratio of the first pole ear 13 to the second pole ear 12 is greater than 0.5 and less than 1
  • the width difference between the first pole ear 13 and the second pole ear 12 is greater than or equal to 2 mm and can be omitted, and only the U-shaped notch 130 on the first pole ear 13 is retained, which also has a certain degree of identification accuracy.
  • FIG6 is a schematic diagram of the structure of the first pole lug in the third embodiment of the present application; different from the U-shaped notch 130 in the first embodiment, in the third embodiment, a sawtooth notch 135 is provided on the first pole lug 13. It can be understood that the sawtooth notch 135 has a strong identification, so that the first pole lug 13 can be clearly distinguished from the second pole lug 12, which can greatly improve the recognition accuracy.
  • FIG. 7 is a schematic diagram of the structure of the first pole ear in the fourth embodiment of the present application; different from the U-shaped notch 130 in the first embodiment, in the fourth embodiment, a wavy notch 132 is provided on the first pole ear 13.
  • the wavy notch 132 also has a strong identification feature, so that the first pole ear 13 can be clearly distinguished from the second pole ear 12, and the wavy notch 132 is easy to process and has low processing difficulty. Therefore, the wavy notch 132 can improve the accuracy of identification and facilitate processing.
  • FIG8 is a schematic diagram of the structure of the first pole ear in the fifth embodiment of the present application; different from the U-shaped notch 130 in the first embodiment, in the fifth embodiment, a square wave-shaped notch 133 is provided on the first pole ear 13.
  • the square wave-shaped notch 133 also has a strong identification feature, so that the first pole ear 13 can be clearly distinguished from the second pole ear 12, and the square wave-shaped notch 133 is easy to process and has low processing difficulty. Therefore, the square wave-shaped notch 133 can improve the identification accuracy and facilitate processing.
  • FIG. 9 is a schematic diagram of the structure of the first pole ear in the sixth embodiment of the present application; different from the U-shaped notch 130 in the first embodiment, in the fifth embodiment, an oblique notch 134 is provided at one end of the first pole ear 13.
  • the oblique notch 134 also has a strong identification feature, so that the first pole ear 13 can be clearly distinguished from the second pole ear 12, and the oblique notch 134 is easy to process and has low processing difficulty. Therefore, the oblique notch 134 can improve the accuracy of identification and facilitate processing.
  • the first electrode tab 13 may also be provided with a semicircular notch or the like.
  • the first pole ear 13 can also be set to be one or a combination of injection-molded serrated notches, wavy notches, square wave notches and semicircular notches.
  • an indentation with identification information is provided on the first pole ear 13, and the identification information may be, but is not limited to, a square, oval, heart-shaped, trapezoidal, or an indentation in a combination of one or more of the shapes of specific patterns.
  • an indentation with identification information is provided on the first pole ear 13, and the processing process will not cause the falling of metal particles and will not generate burrs, which can avoid many secondary hazards and greatly improve the safety factor. Moreover, the indentation on the first pole ear 13 enables the equipment to automatically determine the winding end position and realize winding automation.
  • an adhesive with identification information is provided on the first pole ear 13, and the identification information can be but is not limited to a square, oval, heart-shaped, trapezoidal and one or more combinations of adhesives with specific patterns, or an adhesive with one or more combinations of identification information such as specific numbers and text.
  • the identification of the first pole ear 13 can be greatly improved. Moreover, there is no need to process the first pole ear 13 itself to make it have a wound or the like.
  • the structural strength of the first pole ear 13 itself is stronger and will not break in the subsequent pole ear welding steps. It can protect the first pole ear 13 and avoid some secondary hazards, and it can also play the role of marking the winding end position to realize winding automation.
  • a coating pattern or a printed pattern with identification information is provided on the first pole ear 13, and the identification information may be, but is not limited to, a coating pattern or a printed pattern of a square, oval, heart-shaped, trapezoidal, and a combination of one or more of specific groups, or a coating pattern or a printed pattern of a combination of one or more of specific numbers, text, and other identification information.
  • the identification of the first pole ear 13 can be greatly improved. Moreover, there is no need to process the first pole ear 13 itself to make it have a wound or the like.
  • the structural strength of the first pole ear 13 itself is stronger and will not break in the subsequent pole ear welding steps. It can protect the first pole ear 13 and avoid some secondary hazards, and it can also play the role of marking the winding end position to realize winding automation.
  • the identification hole is the center of a circle. It is understood that in other embodiments, the identification hole is one or more of a square, an ellipse, a heart, a trapezoid and a hollow pattern. In one embodiment, the identification hole needs to be spaced a preset distance from the welding stamp area of the pole lug 11, so as to prevent the first pole lug 13 from being broken during welding due to the U-shaped notch provided thereon. In one embodiment, the preset distance is greater than 0.5 mm.
  • the position where the bare battery cell 1 is wound can be marked through the marking hole, and the winding end position does not need to be determined manually, so that winding automation can be achieved.
  • the features on the first pole ear 13 for identification include, but are not limited to: one or more combinations of U-shaped notches 130, serrated notches 135, wavy notches 132, square wave notches 133, beveled notches 134, indentations with identification information, stickers with identification information, coating patterns or printed patterns with identification information, identification holes, and one or more combinations of the width of the first pole ear 13 being smaller than the width of the second pole ear 12 along the width direction W of the electrode sheet 10.
  • Figure 10 is a schematic diagram of the three-dimensional structure of the bare cell in the first embodiment of the present application.
  • the tabs 11 are stacked, and the first tab 13 is located on the side of the stacked tabs 11 away from the center of the thickness direction T of the bare cell 1.
  • the thickness direction T of the bare cell 1 refers to the thickness direction T of the core formed by winding the electrode sheet 10, as shown in the figure, which is perpendicular to the width direction W and the length direction L mentioned above.
  • the first pole tab 13 is the outermost pole tab, which is located on the side of the stacked pole tabs away from the center of the thickness direction T of the bare battery cell 1 , and the winding can be terminated when the U-shaped notch 130 is identified.
  • the bare cell assembly 2 includes at least two bare cells 1, at least two bare cells 1 are stacked, and at least two bare cells 1 are arranged in series or in parallel.
  • the capacity can be increased by arranging at least two bare cells 1 in parallel or in series.
  • the battery cell 3 includes a bare cell assembly 2, a shell 31 and a cover plate 32, the bare cell assembly 2 is accommodated in the shell 31, and a transfer plate 320 is provided on the cover plate 32.
  • the stacked multiple tabs 11 are welded to the transfer plate 320 to form a weld area 3201.
  • the interval between the U-shaped notch 130 and the weld area 3201 is greater than 0.5 mm.
  • the U-shaped notch 130 needs to avoid the weld mark area 3201 set on the stacked pole ear 11, that is, the distance between the two is greater than 0.5mm to prevent the first pole ear 13 from being broken during welding due to the U-shaped notch 130 set thereon.
  • the pole ear 11 has a pole ear root 110 close to one side of the electrode sheet 10, the distance between the weld area 3201 and the side of the adapter sheet 320 close to the pole ear root 110 is greater than or equal to 2 mm, and the distance between the weld area 3201 and the side of the adapter sheet 320 away from the pole ear root 110 is greater than or equal to 10 mm.
  • the schematic diagram of FIG. 13 is not a schematic diagram of the final form of the battery cell 3, but a schematic diagram for illustrating the distance relationship between the weld area 3201 and the adapter sheet 320.
  • the distance D1 between the weld mark area 3201 and the side of the adapter plate 320 close to the root of the pole ear 110 is greater than or equal to 2 mm
  • the distance D2 between the weld mark area 3201 and the side of the adapter plate 320 away from the root of the pole ear 110 is greater than or equal to 10 mm. Therefore, the weld mark area 3201 is located in a relatively central position of the adapter plate 320, and the weld mark area 3201 will not be located at the edge of the adapter plate 320, so as to avoid the vibration of ultrasonic welding from breaking the adapter plate 320 and causing poor contact, thereby improving the reliability and safety of the connection.
  • one end of the adapter plate 320 in the width direction W close to the pole ear root 110 is substantially flush with the pole ear root 110 , and the distance of the adapter plate 320 in the width direction W beyond one end of the second pole ear 12 away from the pole ear root 110 is greater than or equal to 2 mm.
  • the projections of the pole lug 11 and the first pole lug 13 on the surface of the adapter plate 320 are completely located on the adapter plate 320, so that the adapter plate 320 and the stacked pole lug 11 have sufficient contact area, which can further improve the connection reliability between the adapter plate 320 and the stacked pole lug 11 and the first pole lug 13.
  • the battery cell 3 is a lithium iron phosphate battery, a ternary lithium battery, a lithium battery, etc.
  • the housing 31 is made of aluminum, steel, or stainless steel.
  • the battery cell 3 is a square-shell battery.
  • the present application also provides an electrical device, comprising at least one energy storage device, and the energy storage device is used to provide electrical energy.
  • FIG. 14 is a schematic flow chart of a winding method in an embodiment of the present application.
  • the winding method is applied to the above energy storage device, and the winding method includes:
  • Step 141 stacking the electrode sheet 10 and the separator layer on a winding machine for winding
  • Step 142 a sensor on the winding machine senses the U-shaped notch 130 on the first pole lug 13 to determine the position of the first pole lug 13;
  • Step 143 cutting the electrode sheet 10 along the length direction of the electrode sheet 10 at a position close to the first electrode tab 13 , and ending the winding.
  • a U-shaped notch 130 is provided on the first pole ear.
  • the U-shaped notch 130 marks the position where the bare cell 1 is wound, and the position where the winding is completed is determined based on the U-shaped notch 130 during the process of the electrode sheet 10 being wound to form the bare cell 1.
  • the position where the winding of the bare cell 1 is completed is identified by identifying the U-shaped notch 130, and the electrode sheet 10 is cut at a position close to the first pole ear 13 to end the winding, without the need to manually determine the winding termination position, thereby realizing winding automation.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)

Abstract

一种储能装置，包括电极片（10）和隔膜，电极片（10）和隔膜层叠后卷绕形成裸电芯（1）；电极片（10）沿其宽度方向（W）的一侧端部连接有极耳（11），极耳（11）包括第一极耳（13）和第二极耳（12），第一极耳（13）邻近电极片（10）沿其长度方向（L）的一侧端部设置；第一极耳（13）上设置有U形缺口（130），该U形缺口用于标定电极片的卷绕终止位置，方便识别，有助于实现卷绕自动化。

Description

储能装置、用电设备以及卷绕方法 技术领域
本申请涉及储能领域，尤其涉及一种储能装置、用电设备以及卷绕方法。
背景技术
锂电池生产的过程中需要将正极片、隔膜和负极片层叠后卷绕形成卷芯，再将两个或者多个卷芯串联或者并联以形成电池的电芯。目前的锂电池生产过程中，电芯卷绕过程中需要人工判定卷绕完成的位置，无法实现卷绕自动化。
发明内容
有鉴于此，本申请提供储能装置、用电设备以及卷绕方法，以解决上述技术问题。
本申请第一方面提供了一种储能装置，包括电极片和隔膜，所述电极片和隔膜层叠后卷绕形成裸电芯；所述电极片沿其宽度方向的一侧端部连接有极耳，所述极耳包括第一极耳和第二极耳，所述第一极耳邻近所述电极片沿其长度方向的一侧端部设置；所述第一极耳上设置有U形缺口。
本申请第二方面提供了一种用电设备，包括至少一个上述的储能装置，所述储能装置用于提供电能。
本申请第三方面提供了一种卷绕方法，应用于第一方面所述的储能装置，所述卷绕方法包括以下步骤：
步骤一、将所述电极片和隔膜层叠置于卷绕机进行卷绕；
步骤二、卷绕机上的感应器感应所述第一极耳上的U形缺口，判断所述第一极耳的位置；
步骤三、沿所述电极片的长度方向，在靠近所述第一极耳的位置裁切所述电极片，结束卷绕。
从而，本申请中，所述第一极耳上设置有U形缺口。所述U形缺口标记所述裸电芯完成卷绕的位置，所述电极片被卷绕形成所述裸电芯的过程中基于所述U形缺口确定完成卷绕的位置，通过识别所述U形缺口的方式来识别所 述裸电芯完成卷绕的位置，并在靠近所述第一极耳的位置裁切所述电极片，结束卷绕，无需人工确定卷绕终止位置，实现了卷绕自动化。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施方式中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本申请一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1为本申请一实施例中的电池单体的立体结构示意图；
图2为图1的拆解示意图；
图3为本申请第一实施例中的电极片的结构示意图；
图4为图3中IV处的局部放大示意图；
图5为本申请第二实施例中的第一极耳的结构示意图；
图6为本申请第三实施例中的第一极耳的结构示意图；
图7为本申请第四实施例中的第一极耳的结构示意图；
图8为本申请第五实施例中的第一极耳的结构示意图；
图9为本申请第六实施例中的第一极耳的结构示意图；
图10为图3中的电极片卷绕后的结构示意图；
图11为本申请一实施例中的裸电芯组件的立体结构示意图；
图12为图2旋转180度后的结构示意图；
图13为本申请一实施例中的极耳与转接片焊接后的结构示意图；
图14为本申请一实施例中的卷绕方法的流程示意图。
附图标记：
电池单体3；
裸电芯组件2；
裸电芯1、壳体31、盖板32；
电极片10、极耳11、极耳根部110、第一极耳13、第二极耳12；
长度方向L、宽度方向W、厚度方向T；
U形缺口130、第一端部131、内侧壁1301、第一圆弧1303；
锯齿状缺口135、波浪状缺口132、方波状缺口133、斜角缺口134；
转接片320；
焊印区域3201。
具体实施方式
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，所描述的实施例仅仅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付出创造性劳动前提下所获得的所有其它实施例，都属于本申请保护的范围。
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。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，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中的术语“第一”、“第二”等是用于区别不同对象，而非用于描述特定顺序。本申请中使用的“一个”、“一”或“该”等类似词语也不表示数量限制，而只是用来表示存在至少一个。“包括”或者“包含”等类似的词语意指出现该词语前面的元件或物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其它元件或物件。“连接”或者相连等类似的词语并非限定于物理的或者机械的连接，而是可以包含电性的连接，不管是直接的还是间接的。
在本说明书的描述中，参考术语“实施例”、“具体实施例”、“示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点 可以在任何的一个或多个实施例或示例中以合适的方式结合。
本申请的储能装置，可以是电池单体，也可也是包括电池单体的电池模组、电池包和电池簇等具有电能存储功能的装置，下面以图1所示的电池单体3为例进行说明。
如图2所示，电池单体3包括裸电芯1，壳体31和盖板32，裸电芯1由图3所示的电极片10和隔膜层叠后卷绕而成；如图3所示，电极片10沿其宽度方向W的一侧端部连接有极耳11，极耳11包括第一极耳13和第二极耳12，其中，第一极耳13邻近电极片10沿其长度方向L的一侧端部设置；如图4所示，第一极耳13上设置有U形缺口130。
可以理解的是，电极片10沿其长度方向L的一侧端部即为卷绕过程中电极片10的卷绕终止位置，通过第一极耳13上的U形缺口130，可以在卷绕过程中确定电极片10的卷绕终止位置，进而执行相应的控制操作，以实现卷绕过程自动化。
为了方便后续描述，特定义宽度方向W和长度方向L，其中，电极片10整体呈长条状，其长度尺寸远远大于其宽度尺寸，宽度方向W是电极片10的宽度方向，长度方向L为电极片10的长度方向，具体如图3所示。
可以理解的是，第一极耳13邻近电极片10沿其长度方向L的一侧端部设置是指第一极耳13与电极片10沿其长度方向L的一侧端部之间的距离小于预设距离，当识别到第一极耳13的U形缺口130时，即可产生相应的控制指令，并响应控制指令切断电极片10，以得到一个裸电芯1，无需人工确定卷绕终止位置，实现了卷绕自动化。
一实施例中，请一并参考图4，第一极耳13包括远离电极片10的第一端部131，第一极耳13自其第一端部131向靠近电极片10的一侧切割形成U形缺口130，U形缺口130沿电极片10的长度方向L的尺寸为U形缺口130的宽度，U形缺口130沿电极片10的宽度方向W的尺寸为U形缺口130的深度，U形缺口130的深度与宽度的比值大于1.5小于2。
因为U形缺口130沿U形缺口130的深度方向的切割会比沿U形缺口130 的宽度的切割容易，本申请中通过限定U形缺口130的深度与宽度的比值大于1.5小于2，一方面方便在第一极耳13上切割出U形缺口130，另一方面避免U形缺口130的深度过大使得第一极耳13上没有足够的空间进行切割。
一实施例中，沿电极片10的宽度方向W，第一极耳13的宽度小于第二极耳12的宽度，第一极耳13与第二极耳12的宽度比大于0.5小于1，第一极耳13与第二极耳12的宽度差大于等于2mm。
从而，通过上述设置，使得第一极耳13的整体标识性进一步提高，电极片10在卷绕过程中，识别设备对第一极耳13的识别准备性进一步提高，从而进一步提高由电极片10卷绕形成的裸电芯1的合格率，极大的提高了生产效益。
在一实施例中，U形缺口130的内侧壁1301与第一极耳13的第一端部131通过第一圆弧1303连接。第一圆弧1303的半径与U形缺口130的宽度比值大于0.15小于1.2，第一圆弧1303的半径与U形缺口130的深度的比值大于0.05小于0.15。
从而，通过设置第一圆弧1303，可以进一步方便加工U形缺口130，而且，不容易产生毛刺，在电极片10卷绕成裸电芯1后，第一极耳13上掉落金属颗粒的可能性将很大程度的降低，这样可以避免金属颗粒掉入裸电芯1内部引起短路的问题，也可以避免毛刺扎破电池单体的封装膜进而引发漏液的问题。
请参考图5，图5为本申请第二实施例中的第一极耳的结构示意图。在第二实施例中，第一极耳13上的U形缺口130被省略，沿电极片10的宽度方向W，第一极耳13的宽度小于第二极耳12的宽度，第一极耳13与第二极耳12的宽度比大于0.5小于1，第一极耳13与第二极耳12的宽度差大于等于2mm。这样，可以进一步简化第一极耳13的加工工艺，且由于第一极耳13的宽度小于第二极耳12的宽度，第一极耳13与第二极耳12的宽度比大于0.5小于1，第一极耳13与第二极耳12的宽度差大于等于2mm，因此，其仍然具有一定的标识准确性，并能够简化生产工艺。
可以理解的是，在其它实施例中，第一极耳13的宽度小于第二极耳12的宽度，第一极耳13与第二极耳12的宽度比大于0.5小于1，第一极耳13与第二极耳12的宽度差大于等于2mm可被省略，并只保留述第一极耳13上的U形缺口130，同样具有一定的标识准确性。
至于具体实际实施过程中，应该根据实际生产需要进行选择。
请参考图6，图6为本申请第三实施例中的第一极耳的结构示意图；与第一实施例的U形缺口130不同的是，第三实施例中，第一极耳13上设有锯齿状缺口135。可以理解的是，锯齿状缺口135具有很强的标识性，使第一极耳13能够明显的区别于第二极耳12，可以极大的提高识别准确性。
请参考图7，图7为本申请第四实施例中的第一极耳的结构示意图；与第一实施例的U形缺口130不同的是，第四实施例中，第一极耳13上设有波浪状缺口132。可以理解的是，波浪状缺口132也具有很强的标识性，使第一极耳13能够明显的区别于第二极耳12，而且，波浪状缺口132很容易加工，加工难度低，因此，波浪状缺口132即可以提高标识准确性，又方便加工。
请参考图8，图8为本申请第五实施例中的第一极耳的结构示意图；与第一实施例的U形缺口130不同的是，第五实施例中，第一极耳13上设有方波状缺口133。可以理解的是，方波状缺口133也具有很强的标识性，使第一极耳13能够明显的区别于第二极耳12，而且，方波状缺口133容易加工，加工难度低，因此，方波状缺口133即可以提高标识准确性，又方便加工。
请参考图9，图9为本申请第六实施例中的第一极耳的结构示意图；与第一实施例的U形缺口130不同的是，第五实施例中，第一极耳13上设有一端的斜角缺口134。可以理解的是，斜角缺口134也具有很强的标识性，使第一极耳13能够明显的区别于第二极耳12，而且，斜角缺口134很容易加工，加工难度低，因此，斜角缺口134即可以提高标识准确性，又方便加工。
可以理解的是，与第一实施例的U形缺口130不同的是，在其它实施例中，第一极耳13上还可以设置为半圆形状缺口等。
可以理解的是，与第一实施例的U形缺口130不同的是，在其它实施例 中，第一极耳13上还可以设置为注塑锯齿状缺口、波浪状缺口、方波状缺口和半圆形状缺口的一种或者多种的组合。
可以理解的是，与第一实施例的U形缺口130不同的是，在其它实施例中，第一极耳13上设置具有标识信息的压痕，标识信息可以是但不限于方形、椭圆形、心形、梯形和具有特定图案的一种或者多种的组合的压痕。
从而，在第一极耳13上设置具有标识信息的压痕，其加工过程不会金属颗粒的掉落，也不会产生毛刺，可以避免很多次生危害，极大的提高了安全系数，而且，第一极耳13上的压痕使得设备能够自动确定卷绕终止位置，实现卷绕自动化。
可以理解的是，与第一实施例的U形缺口130不同的是，在其它实施例中，第一极耳13上设置具有标识信息的粘贴件，标识信息可以是但不限于方形、椭圆形、心形、梯形和具有特定图案的一种或者多种的组合的粘贴件，或者具有特定数字、文字等标识信息的一种或者多种组合的粘贴件。
从而，当采用一些醒目的粘贴件时，可以极大的提高第一极耳13的标识性，而且，无需对第一极耳13本身进行加工使其具有创口之类的，第一极耳13本身的结构强度更强，不会在后续极耳焊接的步骤中出现断裂的情况，既可以保护第一极耳13，避免一些次生危害，又可以起到卷绕终止位置的标识作用，实现卷绕自动化。
可以理解的是，与第一实施例的U形缺口130不同的是，在其它实施例中，第一极耳13上设置具有标识信息的镀膜图案或者印刷图案，标识信息可以是但不限于方形、椭圆形、心形、梯形和具有特定团的一种或者多种的组合的镀膜图案或者印刷图案，或者具有特定数字、文字等标识信息的一种或者多种组合的镀膜图案或者印刷图案。
从而，当采用一些醒目的镀膜图案或者印刷图案时，可以极大的提高第一极耳13的标识性，而且，无需对第一极耳13本身进行加工使其具有创口之类的，第一极耳13本身的结构强度更强，不会在后续极耳焊接的步骤中出现断裂的情况，既可以保护第一极耳13，避免一些次生危害，又可以起到卷绕终 止位置的标识作用，实现卷绕自动化。
可以理解的是，与第一实施例的U形缺口130不同的是，在其它实施例中，第一极耳13上设置至少一个间隔设置的标识孔。本实施例中，标识孔为圆心。可以理解的是，在其它实施例中，标识孔为方形、椭圆形、心形、梯形和具有镂空图案的其中一种或者多种。在其中一实施例中，标识孔需与极耳11的焊印区域之间间隔预设距离，从而防止第一极耳13因其上设置有U形缺口而在焊接时被震断。在其中一实施例中，预设距离大于0.5mm。
从而，可以通过标识孔标识裸电芯1完成卷绕的位置，无需人工确定卷绕终止位置，可以实现卷绕自动化。
可以理解的是，在一些可选实施例中，所述第一极耳13上用于起到标识作用的特征，包括但不限于：U形缺口130、锯齿状缺口135、波浪状缺口132、方波状缺口133、斜角缺口134等一种或者多种的组合、具有标识信息的压痕、具有标识信息的粘贴件、具有标识信息的镀膜图案或者印刷图案、标识孔、沿电极片10的宽度方向W，第一极耳13的宽度小于第二极耳12的宽度等的一种或者多种的组合。
请参考图10，图10为本申请第一实施例中的裸电芯的立体结构示意图。电极片10与隔膜卷绕形成裸电芯1后，极耳11层叠设置，第一极耳13位于层叠设置极耳11远离裸电芯1的厚度方向T的中心的一侧。其中，裸电芯1的厚度方向T是指电极片10卷绕形成的卷芯的厚度方向T，具体如图所示，其与前面所述的宽度方向W和长度方向L均呈垂直关系。
从而，本申请中，第一极耳13为最外层极耳，位于层叠设置极耳远离裸电芯1的厚度方向T的中心的一侧，在识别到U形缺口130时，便可终止卷绕。
请参考图11，图11为本申请一实施例中的裸电芯组件的结构示意图。裸电芯组件2包括至少两个裸电芯1，至少两个裸电芯1层叠设置，至少两个裸电芯1串联设置或者并联设置。
从而，通过至少两个裸电芯1的并联或者串联设置，可以增加电容量。
请参考图2、图12和图13，电池单体3包括裸电芯组件2、壳体31和盖板32，裸电芯组件2收容在壳体31内，盖板32上设置有转接片320。请一并参考图13，层叠设置的多个极耳11与转接片320焊接以形成焊印区域3201。U形缺口130与焊印区域3201之间的间隔大于0.5mm。
从而，由于极耳11焊接为超声波焊接，具有很大的冲击力，因此，U形缺口130需避开设置在层叠的极耳11上的焊印区域3201，即，两者之间的距离大于0.5mm，防止第一极耳13因其上设置有U形缺口130而在焊接时被震断。
在其中一实施例中，请再次参考图13，极耳11具有靠近电极片10一侧的极耳根部110，焊印区域3201与转接片320的靠近极耳根部110的一侧的距离大于等于2mm，焊印区域3201与转接片320的远离极耳根部110的一侧的距离大于等于10mm。可以理解的是，图13的示意图并不是电池单体3的最终形态的示意图，而是为了示意出焊印区域3201与转接片320之间的距离关系的示意图，实际产品中，电极片10卷绕成卷芯后，多个极耳11层叠设置，并自极耳根部110处弯折而与卷芯的一端端面大致平行，转接片320贴在层叠设置的多个极耳11上并焊接连接。
从而，焊印区域3201与转接片320的靠近极耳根部110的一侧的距离D1大于等于2mm，焊印区域3201与转接片320的远离极耳根部110的一侧的距离D2大于等于10mm，因此，焊印区域3201位于转接片320的较中央的位置，焊印区域3201也不会位于转接片320的边缘位置，避免超声波焊接的震动将转接片320震断而引起接触不良，可以提高连接的可靠性和安全性。
在其中一实施例中，转接片320在宽度方向W上的靠近极耳根部110的一端与极耳根部110大致平齐，转接片320在宽度方向W上超出第二极耳12远离所述极耳根部110的一端的距离大于等于2mm。
从而，极耳11和第一极耳13在转接片320的表面上的投影完全位于转接片320上，使得转接片320与层叠设置的极耳11具有充分的接触面积，可以进一步提高转接片320与层叠设置的极耳11和第一极耳13之间的连接可靠 性。
在其中一实施例中，电池单体3是磷酸铁锂电池、三元锂电池、锂电池等的其中一种。
在其中一实施例中，壳体31是铝壳、钢壳、不锈钢壳等中的其中一种。
在其中一实施例中，电池单体3为方壳电池。
本申请还提供一种用电设备，包括至少一个储能装置，储能装置用于提供电能。
请参考图14，图14为本申请一实施例中的卷绕方法的流程示意图。所述卷绕方法应用于上述储能装置，所述卷绕方法包括：
步骤141、将所述电极片10和隔膜层叠置于卷绕机进行卷绕；
步骤142、卷绕机上的感应器感应所述第一极耳13上的U形缺口130，判断所述第一极耳13的位置；
步骤143、沿所述电极片10的长度方向，在靠近所述第一极耳13的位置裁切所述电极片10，结束卷绕。
从而，本申请中，所述第一极耳上设置有U形缺口130。所述U形缺口130标记所述裸电芯1完成卷绕的位置，所述电极片10被卷绕形成所述裸电芯1的过程中基于所述U形缺口130确定完成卷绕的位置，通过识别所述U形缺口130的方式来识别所述裸电芯1完成卷绕的位置，并在靠近所述第一极耳13的位置裁切所述电极片10，结束卷绕，无需人工确定卷绕终止位置，实现了卷绕自动化。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详细描述的部分，可以参见其它实施例的相关描述。
应该理解的是，在本申请所提供的一个或者多个实施例中，所揭露的储能装置的实施例仅是示意性的，也可以有其它的实现形式。
以上是本申请实施例的实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本申请实施例原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本申请的保护范围。

Claims (11)

  1. 一种储能装置，其特征在于，包括电极片(10)和隔膜，所述电极片(10)和隔膜层叠后卷绕形成裸电芯(1)；所述电极片(10)沿其宽度方向(W)的一侧端部连接有极耳(11)，所述极耳(11)包括第一极耳(13)和第二极耳(12)，所述第一极耳(13)邻近所述电极片(10)沿其长度方向(L)的一侧端部设置；所述第一极耳(13)上设置有U形缺口(130)。
  2. 根据权利要求1所述的储能装置，其特征在于，所述第一极耳(13)包括远离电极片(10)第一端部(131)，所述第一极耳(13)自其第一端部(131)向靠近所述电极片(10)的一侧切割形成所述U形缺口(130)，所述U形缺口(130)沿所述电极片(10)长度方向(L)的尺寸为所述U形缺口(130)的宽度，所述U形缺口(130)沿所述电极片(10)的宽度方向(W)的尺寸为所述U形缺口(130)的深度，所述U形缺口(130)的深度与宽度的比值大于等于1.5小于2。
  3. 根据权利要求1至2任一项所述的储能装置，其特征在于，沿所述电极片(10)的宽度方向，所述第一极耳(13)的宽度小于所述第二极耳的宽度，所述第一极耳(13)与所述第二极耳的宽度比大于0.5小于1，所述第一极耳(13)与所述第二极耳的宽度差大于等于2mm。
  4. 根据权利要求1至3任一项所述的储能装置，其特征在于，所述第一极耳(13)上设置有具有标识信息的压痕、具有标识信息的粘贴件、具有标识信息的镀膜图案、具有标识信息的印刷图案的其中至少一种。
  5. 根据权利要求1至4任一项所述的储能装置，其特征在于，所述U形缺口(130)的内侧壁(1301)与所述第一极耳(13)的第一端部(131)通过第一圆弧(1303)连接。
  6. 根据权利要求5所述的储能装置，其特征在于，所述第一圆弧(1303)的半径与所述U形缺口(130)的宽度比值大于0.15小于0.2，所述第一圆弧(1303)的半径与所述U形缺口(130)的深度的比值为大于0.05小于0.15。
  7. 根据权利要求1～6任一项所述的储能装置，其特征在于，所述电极片(10)与隔膜卷绕形成所述裸电芯(1)后，所述极耳(11)层叠设置，所述第一极耳(13)位于所述层叠设置的所述极耳(11)远离所述裸电芯(1)的厚度方向(T)上的中心的一侧。
  8. 根据权利要求1～7任一项所述的储能装置，其特征在于，还包括壳体(31)和盖板(32)，所述裸电芯(1)收容在所述壳体(31)内，所述盖板(32)上设置有转接片(320)，层叠设置的所述极耳(11)与所述转接片(320)焊接从而在所述极耳(11)和转接片(320)上均形成焊印区域(3201)；在所述第一极耳(13)上，所述U形缺口(130)与所述焊印区域(3201)的间隔大于0.5mm。
  9. 根据权利要求8所述的储能装置，其特征在于，所述极耳(11)具有靠近所述电极片(10)一侧的极耳根部(110)，所述焊印区域(3201)与所述转接片(320)的靠近所述极耳根部(110)的一侧的距离(D1)大于等于2mm，所述焊印区域(3201)与所述转接片(320)的远离所述极耳根部(110)的一侧的距离(D2)大于等于10mm；所述转接片(320)在所述宽度方向(W)上超出所述第二极耳(12)远离所述极耳根部(110)的一端的距离大于等于2mm。
  10. 一种用电设备，其特征在于，包括至少一个如权利要求1-9任一项所述的储能装置，所述储能装置用于提供电能。
  11. 一种卷绕方法，应用于权利要求1～9任一项所述的储能装置，其特征在于，所述卷绕方法包括以下步骤：
    步骤一、将所述电极片(10)和隔膜层叠置于卷绕机进行卷绕；
    步骤二、卷绕机上的感应器感应所述第一极耳(13)上的U形缺口(130)，判断所述第一极耳(13)的位置；
    步骤三、沿所述电极片(10)的长度方向(L)，在靠近所述第一极耳(13)的位置裁切所述电极片(10)，结束卷绕。
PCT/CN2022/131549 2022-11-11 2022-11-11 储能装置、用电设备以及卷绕方法 WO2024098425A1 (zh)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005122940A (ja) * 2003-10-14 2005-05-12 Matsushita Electric Ind Co Ltd 電池及びその製造方法
CN102916226A (zh) * 2012-09-20 2013-02-06 东莞新能源科技有限公司 方型动力锂离子电池的卷绕方法
JP2015130370A (ja) * 2014-01-06 2015-07-16 株式会社ジェイテクト 蓄電デバイスの製造方法
KR20170088617A (ko) * 2016-01-25 2017-08-02 주식회사 엘지화학 리튬이차전지
WO2021255238A1 (de) * 2020-06-19 2021-12-23 Varta Microbattery Gmbh Lithium-ionen-zelle mit hoher spezifischer energiedichte
CN216450703U (zh) * 2021-10-19 2022-05-06 厦门海辰新能源科技有限公司 一种二次电池的电芯及二次电池
CN217134453U (zh) * 2022-04-21 2022-08-05 合肥国轩高科动力能源有限公司 一种单隔膜叠片电芯单元及叠片电芯结构

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005122940A (ja) * 2003-10-14 2005-05-12 Matsushita Electric Ind Co Ltd 電池及びその製造方法
CN102916226A (zh) * 2012-09-20 2013-02-06 东莞新能源科技有限公司 方型动力锂离子电池的卷绕方法
JP2015130370A (ja) * 2014-01-06 2015-07-16 株式会社ジェイテクト 蓄電デバイスの製造方法
KR20170088617A (ko) * 2016-01-25 2017-08-02 주식회사 엘지화학 리튬이차전지
WO2021255238A1 (de) * 2020-06-19 2021-12-23 Varta Microbattery Gmbh Lithium-ionen-zelle mit hoher spezifischer energiedichte
CN216450703U (zh) * 2021-10-19 2022-05-06 厦门海辰新能源科技有限公司 一种二次电池的电芯及二次电池
CN217134453U (zh) * 2022-04-21 2022-08-05 合肥国轩高科动力能源有限公司 一种单隔膜叠片电芯单元及叠片电芯结构

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