WO2021134788A1 - 电芯及包含其的电化学装置和电子装置 - Google Patents
电芯及包含其的电化学装置和电子装置 Download PDFInfo
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- WO2021134788A1 WO2021134788A1 PCT/CN2020/070294 CN2020070294W WO2021134788A1 WO 2021134788 A1 WO2021134788 A1 WO 2021134788A1 CN 2020070294 W CN2020070294 W CN 2020070294W WO 2021134788 A1 WO2021134788 A1 WO 2021134788A1
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- electrode assembly
- current collector
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- active material
- pole piece
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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
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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- 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
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- 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
- This application relates to the field of energy storage, in particular to a battery cell, an electrochemical device and an electronic device containing the same.
- electrochemical devices for example, lithium ion batteries
- electrochemical devices are widely used in electronic devices such as cameras, digital video cameras, mobile phones, and notebook computers, manufacturers and users are increasingly concerned about their safety and reliability.
- electrochemical devices are susceptible to external impacts (for example, falling from a height, etc.) during use, and are prone to breakage when impacted by external forces, resulting in safety problems such as liquid leakage, fire or even explosion.
- An electrochemical device usually includes a battery cell and a shell housing the battery cell.
- the battery cell includes an electrode assembly and a packaging bag for accommodating the electrode assembly.
- the electrode assembly passes through a positive pole piece, a negative pole piece, and is arranged between the positive pole piece and the positive pole piece.
- the separator between the negative pole pieces is wound or stacked in sequence.
- the electrode assembly may include tabs, and an adhesive layer is provided between the electrode assembly and the packaging bag.
- the setting of the adhesive layer plays an important role in the stability and safety of the cell after being impacted. If the adhesive layer is not set properly, the electrode assembly will be easily separated from the packaging bag after the battery is impacted, and its position will be changed, which may cause safety hazards such as liquid leakage, smoke, fire and even explosion.
- This application solves at least one of the technical problems described in the background art through the provision of a specific adhesive layer.
- an embodiment of the present application provides a battery cell, including an electrode assembly and a packaging bag accommodating the electrode assembly, an adhesive layer is provided between the electrode assembly and the packaging bag, and the adhesive
- the circle can refer to the positive pole piece, the negative pole piece or the separator), and W1, L1, W2 and L2 have the same unit, such as mm or cm.
- the bonding force F and the bonding area ratio a of the bonding layer satisfy the following relationship: In some embodiments, the bonding force F and the bonding area ratio a of the bonding layer satisfy the following relationship:
- the positive pole piece in the electrode assembly is bonded to the packaging bag.
- the negative pole piece in the electrode assembly is adhered to the packaging bag.
- the separator in the electrode assembly is adhered to the packaging bag.
- the bonding area ratio a is not less than 20% and not more than 97%. In some embodiments, the bonding area ratio a is not less than 70% and not more than 97%.
- the bonding area ratio a of the bonding layer is within the above range, the electrode assembly is easy to be packaged in the packaging bag, and the surface of the bonding layer is flat, which will not affect the interface of the cell, and thus will not affect the circulation of the cell. Any adverse effects on performance.
- the adhesive force F is not less than 1 N/m and not more than 150 N/m. In some embodiments, the adhesive force F is not less than 10 N/m and not more than 120 N/m. In some embodiments, the adhesive force F is not less than 30 N/m and not more than 100 N/m. In some embodiments, the adhesive force F is not less than 50 N/m and not more than 80 N/m.
- the electrode assembly includes a first pole piece, the first pole piece includes a first current collector, a first active material layer, and a first tab, and the first active material layer is disposed on the On at least a part of the first current collector, and the first active material layer is not provided at the starting end of the first current collector, and the first tab is electrically connected to the starting end of the first current collector; or An active material layer is provided with a first groove, and the first tab is arranged in the first groove and is electrically connected to the first current collector.
- the first pole piece may further include at least one first tab, the first active material layer is provided with at least one first groove, and the plurality of first tabs are respectively disposed in The corresponding at least one first groove is electrically connected to the first current collector; or the at least one first tab is cut by the first current collector.
- the electrode assembly includes a second pole piece, and the second pole piece has substantially the same configuration as the first pole piece.
- the second pole piece includes a second current collector, a second active material layer, and a second tab, the second active material layer is disposed on at least a part of the second current collector, and The second active material layer is not provided at the starting end of the second current collector, and the second tab is electrically connected to the starting end of the second current collector; or the second active material layer is provided with a second groove, The second tab is arranged in the second groove and is electrically connected to the second current collector.
- the second pole piece includes at least one second tab
- the first active material layer is provided with at least one second groove
- the plurality of second tabs are respectively disposed on the corresponding
- the at least one second groove is electrically connected to the second current collector; or the at least one second tab is cut by the second current collector.
- the adhesive layer has a single-layer structure or a multi-layer structure.
- the adhesive layer is in the shape of a sheet, a dot or a strip.
- the adhesive layer is continuously or discontinuously provided between the electrode assembly and the packaging bag.
- the adhesive layer is disposed on at least one straight section of the wound electrode assembly.
- the adhesive layer has a regular morphology, an irregular morphology or a combination thereof.
- the adhesive layer includes at least one of polybutadiene, polypropylene, polypentadiene, and a copolymer of styrene or butadiene, and a petroleum resin.
- the adhesive layer further includes at least one of wood powder, talc, or calcium carbonate.
- an embodiment of the present application provides an electrochemical device, which includes any of the above-mentioned battery cells according to the embodiments of the present application.
- an embodiment of the present application provides an electronic device, which includes any of the electrochemical devices described above according to the embodiments of the present application.
- Fig. 1 shows a schematic diagram of the pole piece of the outermost circle of the electrode assembly according to an embodiment of the present application after unfolding.
- Fig. 2A shows a schematic diagram of an electrode assembly having a sheet-shaped area adhesive layer according to an embodiment of the present application.
- Fig. 2B shows a schematic diagram of an electrode assembly having a plurality of sheet-shaped area adhesive layers according to an embodiment of the present application.
- FIG. 2C shows a schematic diagram of an electrode assembly with a dot-shaped area adhesive layer according to an embodiment of the present application.
- Fig. 2D shows a schematic diagram of an electrode assembly having a strip-shaped area adhesive layer according to an embodiment of the present application.
- FIG. 2E shows a schematic diagram of an electrode assembly having multiple strip-shaped area bonding layers according to an embodiment of the present application.
- Fig. 3 shows a schematic diagram of a first pole piece according to an embodiment of the present application.
- FIG. 4 shows a cross-sectional view of the electrode assembly including the first pole piece shown in FIG. 3.
- Fig. 5 shows a schematic diagram of a first pole piece according to another embodiment of the present application.
- FIG. 6 shows a cross-sectional view of the electrode assembly including the first pole piece shown in FIG. 5.
- Fig. 7 shows a schematic diagram of a first pole piece according to another embodiment of the present application.
- FIG. 8 shows a cross-sectional view of the electrode assembly including the first pole piece shown in FIG. 7.
- the structure when a first feature is located "above” or “below” a second feature in a structure, the structure may include embodiments in which the first feature and the first feature The two features are in direct contact, and the structure may also include another embodiment, wherein the first feature is not in direct contact with the second feature, but is in contact with an additional feature formed between the two.
- first feature when the first feature is “above”, “above”, or “on top of” the second feature, it may include embodiments in which the first feature is directly or obliquely Located “above” the second feature, “above” or “on the top of the second feature", or only means that the height of the first feature is higher than the height of the second feature; and when the first feature When located “under” the second feature, “under” the second feature, or “at the bottom of the second feature”, it may include embodiments in which the first feature is directly or obliquely located on the second feature" "Below”, “below” the second feature, or “at the bottom of the second feature", or only means that the height of the first feature is lower than the height of the second feature.
- the embodiment of the present application provides a battery cell, which includes an electrode assembly and a packaging bag containing the electrode assembly.
- An adhesive layer is provided between the electrode assembly and the packaging bag.
- the force F and the bonding area ratio a satisfy the following relationship:
- the bonding area ratio a (W1 ⁇ L1)/(W2 ⁇ L2), where W1 is the width of the bonding layer, L1 is the length of the bonding layer, W2 is the width of the electrode assembly,
- the electrode assembly can be formed by winding or stacking positive pole pieces, separators and negative pole pieces in sequence, and L2 is the length of the electrode assembly, or L2 refers to the width of the outermost ring of the electrode assembly after unfolding,
- the outermost circle can refer to the positive pole piece (as shown in Figure 1), the negative pole piece or the separator.
- the bonding force F and the bonding area ratio a of the bonding layer satisfy the following relationship: In some embodiments, the bonding force F and the bonding area ratio a of the bonding layer satisfy the following relationship:
- the adhesive layer has a sheet shape, a dot shape or a strip shape.
- the adhesive area ratio of the adhesive layer is the sum of the adhesive area of each sheet-shaped adhesive layer (that is, the area where each adhesive layer is in contact with the electrode assembly) and the adhesive The ratio between the surface area of the electrode assembly on the side of the layer.
- a (W1 ⁇ L1)/(W2 ⁇ L2).
- the bonding area is the size of the sheet-shaped adhesive layers a, b, c, d, and e.
- the total area, a (W1a ⁇ L1a+W1b ⁇ L1b+W1c ⁇ L1c+W1d ⁇ L1d+W1e ⁇ L1e)/(W2 ⁇ L2).
- the adhesive area ratio is the ratio between the area surrounded by the adhesive material dots of the outermost circle and the surface area of the electrode assembly on the side where the adhesive layer is provided.
- the adhesive area ratio is the ratio between the total area of each strip-shaped adhesive layer and the surface area of the electrode assembly on the side where the adhesive layer is provided.
- a (W1 ⁇ L1)/(W2 ⁇ L2).
- the positive pole piece in the electrode assembly is bonded to the packaging bag.
- the negative pole piece in the electrode assembly is adhered to the packaging bag.
- the separator in the electrode assembly is adhered to the packaging bag.
- the adhesive layer has a single-layer structure or a multi-layer structure.
- the adhesive layer is continuously disposed between the battery core and the housing, as shown in FIGS. 2A and 2D.
- the adhesive layer is discontinuously disposed between the electrode assembly and the packaging bag, as shown in FIGS. 2B, 2C, and 2E.
- the adhesive layer has a regular morphology (as shown in FIG. 2E), an irregular morphology (as shown in FIG. 2D), or a combination thereof.
- regular topography refers to the regular topography of the bonding layer boundary, for example, square, rectangle, rhombus, circle, ellipse, triangle, trapezoid, polygon, etc.
- irregular topography refers to the irregular topography of the bonding layer boundary, that is, the topography that is different from the regular topography, for example, those topography that cannot be named by conventional shape terms.
- the bonding area ratio a of the bonding layer is not less than 20% and not more than 97%. In some embodiments, the bonding area ratio a is not less than 70% and not more than 97%.
- the bonding area ratio of the bonding layer is within the above range, the electrode assembly is easy to be packaged in the packaging bag, and the bonding layer has a flat surface, which will not affect the interface of the cell, and will not affect the cycle performance of the cell. Have any adverse effects.
- the adhesive force F is not less than 1 N/m and not more than 150 N/m. In some embodiments, the adhesive force F is not less than 10 N/m and not more than 120 N/m. In some embodiments, the adhesive force F is not less than 30 N/m and not more than 100 N/m. In some embodiments, the adhesive force F is not less than 50 N/m and not more than 80 N/m.
- the battery cell includes a first pole piece, the first pole piece includes a first current collector, a first active material layer, and a first tab, and the first active material layer is disposed on the At least a part of the first current collector may be as shown in FIGS. 3 and 4.
- the first active material layer is not provided at the starting end of the first current collector, and the first tab is electrically connected to the starting end of the first current collector, as shown in FIGS. 3 and 4 Shown.
- Fig. 3 shows a first pole piece according to an embodiment of the present application.
- the first pole piece 300 includes a first current collector 301, a first active material 302 and a first tab 303.
- the first active material 302 is provided on both surfaces of the first current collector 301 (ie, the first surface 300a and the second surface 300b).
- the first current collector 301 includes a starting end 304, middle portions 305a, 305b, and ending ends 306a, 306b along the winding direction.
- the first active material 302 is disposed on the middle portions 305a, 305b of the first current collector 301, and the first tab 303 It is arranged at the starting end 304 of the first current collector 301 and is electrically connected to the first current collector 301. As shown in FIG.
- the middle portion 305a provided with the first active material 302 on the first surface 300a is longer than the middle portion 305b provided with the first active material 302 on the second surface 300b, so that the first current collector 301 includes a single side
- the portion 307 is a portion having the first active material 302 only on one side surface of the first current collector 301.
- the second pole piece 310 includes a second current collector 311, a second active material 312, and a second tab 313, and the second pole piece 310 and the first pole piece 300 may adopt substantially the same configuration.
- FIG. 4 shows an electrode assembly formed by winding the first pole piece 300, the isolation film 320, and the second pole piece 310 shown in FIG. 3 in sequence, where W2 is the width of the electrode assembly after being wound.
- the first active material layer is provided with a first groove, and the first tab is arranged in the first groove and is electrically connected to the first current collector, as shown in FIG. 5 and Shown in Figure 6.
- Fig. 5 shows a first pole piece according to another embodiment of the present application.
- the first pole piece 500 includes a first current collector 501, a first active material 502 and a first tab 503.
- the first active material 502 is provided on both surfaces of the first current collector 501 (ie, the first surface 500a and the second surface 500b).
- the first current collector 501 includes a starting end 504, middle portions 505a, 505b, and ending ends 506a, 506b along the winding direction, and the first active material 502 is provided in the middle portions 505a, 505b of the first current collector 501.
- the middle parts 505 a and 505 b of the first current collector 501 provided with the first active material 502 are provided with grooves 508, and the first tab 503 is arranged in the groove 508 and is electrically connected to the first current collector 501.
- the middle portion 505a provided with the first active material 502 on the first surface 500a is longer than the middle portion 505b provided with the first active material 502 on the second surface 500b, so that the first current collector 501 includes a single side
- the portion 507 is a portion having the first active material 502 only on one side surface of the first current collector 501.
- the second pole piece 510 includes a second current collector 511, a second active material 512, and a second tab 513, and the second pole piece 510 and the first pole piece 500 may have substantially the same configuration.
- FIG. 6 shows an electrode assembly formed by winding the first pole piece 500, the isolation film 520, and the second pole piece 510 shown in FIG. 5, where W2 is the width of the electrode assembly after being wound.
- the first pole piece includes at least one first tab
- the first active material layer is provided with at least one first groove
- the plurality of first tabs are respectively disposed on the corresponding
- the at least one first groove is electrically connected to the first current collector, as shown in FIGS. 7 and 8.
- the at least one first tab is cut through the first current collector.
- Fig. 7 shows a first pole piece according to another embodiment of the present application.
- the first pole piece 700 includes a first current collector 701, a first active material 702, and a first tab 703.
- the first active material 702 is provided on both surfaces of the first current collector 701 (ie, the first surface 700a and the second surface 700b).
- the first current collector 701 includes coated regions 705a, 705b and uncoated regions 706a, 706b along the winding direction, and the first active material 702 is provided in the coated regions 705a, 705b of the first current collector 701.
- the first tab 703 is cut through the first collector 701. As shown in FIG.
- the middle portion 705a provided with the first active material 702 on the first surface 700b is longer than the middle portion 705b provided with the first active material 702 on the second surface 700b, so that the first current collector 701 includes a single side
- the portion 707 that is, the portion having the first active material 702 on only one side surface of the first current collector 701.
- the second pole piece 710 includes a second current collector 711, a second active material 712, and a second tab 713, and the second pole piece 710 and the first pole piece 700 may adopt substantially the same configuration.
- FIG. 8 shows an electrode assembly formed by winding the first pole piece 700, the isolation film 720, and the second pole piece 710 shown in FIG. 7, where W2 is the width of the electrode assembly after being wound.
- the adhesive layer is disposed on at least one straight section of the wound electrode assembly.
- the adhesive layer includes at least one of polybutadiene, polypropylene, polypentadiene, and a copolymer of styrene or butadiene, and a petroleum resin. In some embodiments, the adhesive layer further includes at least one of wood powder, talc, or calcium carbonate.
- the embodiment of the present application also provides an electrochemical device, which includes the battery cell according to any one of the embodiments of the present application.
- the electrochemical device of the embodiment of the present application includes any device that undergoes an electrochemical reaction, and specific examples thereof include all kinds of primary batteries, secondary batteries, fuel cells, solar cells, or capacitors.
- the electrochemical device is a lithium secondary battery, including a lithium metal secondary battery, a lithium ion secondary battery, a lithium polymer secondary battery, or a lithium ion polymer secondary battery.
- An embodiment of the application further provides an electronic device, which includes the electrochemical device according to any embodiment of the application.
- the electrochemical device of the present application includes any device that undergoes an electrochemical reaction, and specific examples thereof include all kinds of primary batteries, secondary batteries, fuel cells, solar cells, or capacitors.
- the electrochemical device is a lithium secondary battery, including a lithium metal secondary battery, a lithium ion secondary battery, a lithium polymer secondary battery, or a lithium ion polymer secondary battery.
- the electrochemical device of the embodiment of the present application includes a positive pole piece having a positive active material capable of inserting and extracting metal ions, a negative pole piece according to the embodiment of the present application, an electrolyte, and a positive electrode. Separating film between sheet and negative pole sheet.
- the positive pole piece, the isolation membrane and the negative pole piece are placed in sequence and wound to form an electrode assembly.
- An adhesive substance is provided on a straight section of the outer surface of the wound electrode assembly to form an adhesive layer.
- the electrode assembly is placed in the packaging bag, and the adhesive layer is bonded to the packaging bag to obtain an electric core.
- W1 is the width of the adhesive layer
- L1 is the length of the adhesive layer
- W2 is the width of the electrode assembly
- L2 is the length of the electrode assembly.
- Cycle capacity retention ratio discharge capacity after the 500th cycle/discharge capacity at the first cycle ⁇ 100%.
- Table 1 shows the bonding area ratio and bonding force of the bonding layer in each comparative example and the examples, as well as the drop safety and cycle performance of the battery core.
- references to “embodiments”, “parts of embodiments”, “one embodiment”, “another example”, “examples”, “specific examples” or “partial examples” throughout the specification mean that At least one embodiment or example in this application includes the specific feature, structure, material, or characteristic described in the embodiment or example. Therefore, descriptions appearing in various places throughout the specification, such as: “in some embodiments”, “in embodiments”, “in one embodiment”, “in another example”, “in an example “In”, “in a specific example” or “exemplified”, which are not necessarily quoting the same embodiment or example in this application.
- the specific features, structures, materials, or characteristics herein can be combined in one or more embodiments or examples in any suitable manner.
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Abstract
一种电芯,其包括电极组件和***述电极组件的包装袋,所述电极组件与所述包装袋之间设置有粘接层。当所述粘接层的粘结力与粘结面积率满足特定关系时,可使电芯在受撞击后仍然保持高度安全性能。另外,还包括一种包含上述电芯的电化学装置和电子装置。
Description
本申请涉及储能领域,具体涉及一种电芯及包含其的电化学装置和电子装置。
随着电化学装置(例如,锂离子电池)广泛应用在照相机、数码摄像机、移动电话和笔记本电脑等电子设备中,制造商及使用者越来越关注其安全性和可靠性。然而,电化学装置在使用过程中易受到外力撞击(例如,从高处跌落等),当受到外力撞击时易发生破损,从而导致漏液、起火甚至***等安全问题。
鉴于此,确有必要提供一种改进的具有良好安全性能的电芯。
发明内容
电化学装置通常包括电芯和***述电芯的外壳,所述电芯包括电极组件和***述电极组件的包装袋,电极组件通过正极极片、负极极片以及设置在正极极片与负极极片之间的隔离膜依序卷绕或堆叠而成。电极组件可以包括极耳,在所述电极组件与所述包装袋之间设置有粘接层。粘接层的设置对于电芯受撞击后的稳定性和安全性具有重要作用。如果粘接层设置不当,电芯在受撞击后,电极组件易与包装袋分离,使其位置发生改变,从而会产生漏液、冒烟、起火甚至***等安全隐患。
本申请通过特定的粘接层设置以解决背景技术中所述的至少一个技术问题。
在一方面,本申请实施例提供了一种电芯,包括电极组件和***述电极组件的包装袋,在所述电极组件与所述包装袋之间设置有粘接层,所述粘接层的粘接力F(单位为N/m)与粘接面积率a满足以下关系式:
(以各参数的数值来计算),其中所述粘接面积率a=(W1×L1)/(W2×L2),其中W1为所述粘接层的宽度,L1为所述粘接层的长度,W2为所述电极组件的宽度(电极组件可通过卷绕或堆叠而成),及L2为所述电极组件的长度(或者指所述电极组件的最外圈展开后的宽度,最外圈可以指正极极片、负极极片或隔离膜),W1、L1、W2和L2具有相同的单位,如mm或cm等。
当电芯中的粘接层的粘接力与粘接面积率符合上述关系式时,电芯在受到撞击后,电极组件与包装袋之间具有适当的摩擦力,使得电极组件与包装袋之间既不会发生分离也不会过度撕扯。
在一些实施例中,与所述包装袋粘接的是电极组件中的正极极片。在一些实施例中,与所述包装袋粘接的是电极组件中的负极极片。在一些实施例中,与所述包装袋粘接的是电极组件中的隔离膜。
根据本申请的实施例,所述粘接面积率a不小于20%且不大于97%。在一些实施例中,所述粘接面积率a不小于70%且不大于97%。当所述粘接层的粘接面积率a在上述范围内时,电极组件易于封装于包装袋中,且粘接层表面平整,不会影响电芯的界面,从而不会对电芯的循环性能产生任何不良影响。
根据本申请的实施例,所述粘接力F不小于1N/m且不大于150N/m。在一些实施例中,所述粘接力F不小于10N/m且不大于120N/m。在一些实施例中,所述粘接力F不小于30N/m且不大于100N/m。在一些实施例中,所述粘接力F不小于50N/m且不大于80N/m。
根据本申请的实施例,所述电极组件包括第一极片,所述第一极片包括第一集电器、第一活性材料层和第一极耳,所述第一活性材料层设置在所述第一集电器的至少一部分上,且第一集电器的起始端未设置所述第一活性材料层,所述第一极耳电连接所述第一集电器的起始端;或者所述第一活性物质层设有第一凹槽,所述第一极耳设置在所述第一凹槽内且电连接所述第一集电器。
根据本申请的实施例,所述第一极片还可以包括至少一个第一极耳,所述第一活性物质层设有至少一个第一凹槽,所述多个第一极耳分别设置在相应的所述至少一个第一凹槽内且电连接所述第一集电器;或者所述至少一个第一极耳通过所述第一集电器裁切而成。
根据本申请的实施例,所述电极组件包括第二极片,所述第二极片与第一极片具有基本相同的设置。在一些实施例中,所述第二极片包括第二集电器、第二活性材料层和第二极耳,所述第二活性材料层设置在所述第二集电器的至少一部分上,且第二集电器的起始端未设置所述第二活性材料层,所述第二极耳电连接 所述第二集电器的起始端;或者所述第二活性物质层设有第二凹槽,所述第二极耳设置在所述第二凹槽内且电连接所述第二集电器。在一些实施例中,所述第二极片包括至少一个第二极耳,所述第一活性物质层设有至少一个第二凹槽,所述多个第二极耳分别设置在相应的所述至少一个第二凹槽内且电连接所述第二集电器;或者所述至少一个第二极耳通过所述第二集电器裁切而成。
根据本申请的实施例,所述粘接层为单层结构或多层结构。
根据本申请的实施例,所述粘接层呈片状、点状或条状。
根据本申请的实施例,所述粘接层连续地或不连续地设置于所述电极组件和所述包装袋之间。
根据本申请的实施例,所述粘接层设置于卷绕后的电极组件的至少一个平直段上。
根据本申请的实施例,所述粘接层具有规则形貌、不规则形貌或其组合。
根据本申请的实施例,所述粘接层包含聚丁二烯、聚丙二烯、聚戊二烯和苯乙烯或丁二烯共聚物中的至少一者和石油树脂。在一些实施例中,所述粘接层进一步包含木质粉、滑石粉或碳酸钙中的至少一者。
在另一方面,本申请实施例提供一种电化学装置,其包括上述根据本申请实施例所述的任一种电芯。
在又一方面,本申请实施例提供一种电子装置,其包括上述根据本申请实施例所述的任一种电化学装置。
本申请实施例的额外层面及优点将部分地在后续说明中描述、显示、或是经由本申请实施例的实施而阐释。
在下文中将简要地说明为了描述本申请实施例或现有技术所必要的附图以便于描述本申请的实施例。显而易见地,下文描述中的附图仅只是本申请中的部分实施例。对本领域技术人员而言,在不需要创造性劳动的前提下,依然可以根据这些附图中所例示的结构来获得其他实施例的附图。
图1展示了根据本申请实施例的电极组件最外圈的极片展开后的示意图。
图2A展示了根据本申请实施例的具有一个片状区域粘接层的电极组件的示意图。
图2B展示了根据本申请实施例的具有多个片状区域粘接层的电极组件的示 意图。
图2C展示了根据本申请实施例的具有点状区域粘接层的电极组件的示意图。
图2D展示了根据本申请实施例的具有一个条状区域粘接层的电极组件的示意图。
图2E展示了根据本申请实施例的具有多个条状区域粘接层的电极组件的示意图。
图3展示了根据本申请实施例的第一极片的示意图。
图4展示了包括图3所示的第一极片的电极组件的剖视图。
图5展示了根据本申请另一实施例的第一极片的示意图。
图6展示了包括图5所示的第一极片的电极组件的剖视图。
图7展示了根据本申请又一实施例的第一极片的示意图。
图8展示了包括图7所示的第一极片的电极组件的剖视图。
本申请的实施例将会被详细的描示在下文中。在本申请说明书全文中,将相同或相似的组件以及具有相同或相似的功能的组件通过类似附图标记来表示。在此所描述的有关附图的实施例为说明性质的、图解性质的且用于提供对本申请的基本理解。本申请的实施例不应该被解释为对本申请的限制。
在本申请中,除非经特别指定或限定之外,当在结构中第一特征位于第二特征“之上”或“之下”,该结构可包含实施例,其中该第一特征与该第二特征直接接触,且该结构也可包含另一实施例,其中该第一特征不与该第二特征直接接触,而是通过在两者之间形成的额外特征相接触。此外,当第一特征位于第二特征“之上”、在第二特征的“上面”或是“在第二特征的顶部”,其可包括实施例,其中该第一特征直接地或倾斜地位于第二特征“之上”、在第二特征的“上面”或是“在第二特征的顶部”,或仅只代表该第一特征的高度高于第二特征的高度;而当第一特征位于第二特征“之下”、在第二特征的“下面”或是“在第二特征的底部”时,其可包括实施例,其中该第一特征直接地或倾斜地位于第二特征“之下”、在第二特征的“下面”或是“在第二特征的底部”,或仅只代表该第一特征的高度低于第二特征的高度。
本申请实施例提供了一种电芯,包括电极组件和***述电极组件的包装袋,在所述电极组件与所述包装袋之间设置有粘接层,所述粘接层的粘接力F与粘接 面积率a满足以下关系式:
所述粘接面积率a=(W1×L1)/(W2×L2),其中W1为所述粘接层的宽度,L1为所述粘接层的长度,W2为所述电极组件的宽度,其中电极组件可通过正极极片、隔离膜和负极极片依序卷绕或堆叠而成,及L2为所述电极组件的长度,或者L2指所述电极组件的最外圈展开后的宽度,最外圈可以指正极极片(可如图1所示)、负极极片或隔离膜。
当电芯中的粘接层的粘接力与粘接面积率符合上述关系式时,电芯在受到撞击后,电极组件与包装袋之间具有适当的摩擦力,使得电极组件与包装袋之间既不会发生分离也不会过度撕扯。
在一些实施例中,所述粘接层呈片状、点状或条状。
当所述粘接层为片状时,粘接层的粘接面积率为各片状粘接层的粘接面积(即各粘接层与电极组件相接触的面积)之和与设置有粘接层一侧的电极组件的表面面积之间的比率。如图2A所示,当粘接层具有一个片状粘接层时,a=(W1×L1)/(W2×L2)。如图2B所示,当粘接层包括多个片状粘接层(a、b、c、d和e)时,粘接面积为片状粘结层a、b、c、d和e的面积总和,a=(W1a×L1a+W1b×L1b+W1c×L1c+W1d×L1d+W1e×L1e)/(W2×L2)。
当所述粘接层为点状时,粘接面积率为最外圈的粘结材料点所包围的面积与设置有粘接层一侧的电极组件的表面面积之间的比率。如图2C所示,粘接层包括多个点状粘接层,a=(W1×L1)/(W2×L2)。
当所述粘接层为条状时,粘接面积率为各条状粘接层的面积总和与设置有粘接层一侧的电极组件的表面面积之间的比率。如图2D所示,当粘接层具有一个条状粘接层时,a=(W1×L1)/(W2×L2)。如图2E所示,当粘接层包括多个条状粘接层(x和y)时,粘接面积为条状粘结层x和y的总和,a=(W1x×L1x+W1y×L1y)/(W2×L2)。
在一些实施例中,与所述包装袋粘接的是电极组件中的正极极片。在一些实施例中,与所述包装袋粘接的是电极组件中的负极极片。在一些实施例中,与所述包装袋粘接的是电极组件中的隔离膜。
在一些实施例中,所述粘接层为单层结构或多层结构。
在一些实施例中,所述粘接层连续地设置于所述电芯和所述外壳之间,如图2A和2D所示。
在一些实施例中,所述粘接层不连续地设置于所述电极组件和所述包装袋之间,如图2B、2C和2E所示。
在一些实施例中,所述粘接层具有规则形貌(如图2E所示)、不规则形貌(如图2D所示)或其组合。术语“规则形貌”是粘接层边界有规律的形貌,例如,正方形、长方形、菱形、圆形、椭圆形、三角形、梯形、多边形等。术语“不规则形貌”是指粘接层边界没有规律的形貌,即不同于规则形貌的形貌,例如,那些无法以常规形状术语命名的形貌。
在一些实施例中,粘接层的粘接面积率a不小于20%且不大于97%。在一些实施例中,所述粘接面积率a不小于70%且不大于97%。当所述粘接层的粘接面积率在上述范围内时,电极组件易于封装于包装袋中,且粘接层表面平整,不会影响电芯的界面,从而不会对电芯的循环性能产生任何不良影响。
在一些实施例中,所述粘接力F不小于1N/m且不大于150N/m。在一些实施例中,所述粘接力F不小于10N/m且不大于120N/m。在一些实施例中,所述粘接力F不小于30N/m且不大于100N/m。在一些实施例中,所述粘接力F不小于50N/m且不大于80N/m。
在一些实施例中,所述电芯包括第一极片,所述第一极片包括第一集电器、第一活性材料层和第一极耳,所述第一活性材料层设置在所述第一集电器的至少一部分上,可如图3和图4所示。
在一些实施例中,所述第一集电器的起始端未设置所述第一活性材料层,所述第一极耳电连接所述第一集电器的起始端,可如图3和图4所示。
图3展示了根据本申请实施例的第一极片。第一极片300包括第一集电器301、第一活性材料302和第一极耳303。第一活性材料302设置在第一集电器301的两个表面(即,第一表面300a和第二表面300b)上。第一集电器301沿卷绕方向包括起始端304、中间部分305a、305b以及收尾端306a、306b,第一活性材料302设置在第一集电器301的中间部分305a、305b,第一极耳303设置在第一集电器301的起始端304并与第一集电器301电连接。如图3所示,第一表面300a上设置有第一活性材料302的中间部分305a比第二表面300b上设置有第一活性材料302的中间部分305b长,使得第一集电器301包括单侧部分 307,即仅在第一集电器301的单侧表面上具有第一活性材料302的部分。在一些实施例中,第二极片310包括第二集电器311、第二活性材料312和第二极耳313,第二极片310与第一极片300可以采用基本相同的设置。图4展示了由图3所示的第一极片300、隔离膜320和第二极片310依序卷绕形成的电极组件,其中W2为所述电极组件卷绕后的宽度。
在一些实施例中,所述第一活性物质层设有第一凹槽,所述第一极耳设置在所述第一凹槽内且电连接所述第一集电器,可如图5和图6所示。
图5展示了根据本申请另一实施例的第一极片。第一极片500包括第一集电器501、第一活性材料502和第一极耳503。第一活性材料502设置在第一集电器501的两个表面(即,第一表面500a和第二表面500b)上。第一集电器501沿卷绕方向包括起始端504、中间部分505a、505b以及收尾端506a、506b,第一活性材料502设置在第一集电器501的中间部分505a、505b。第一集电器501设置有第一活性材料502的中间部分505a、505b上设置有凹槽508,第一极耳503设置于该凹槽508内并与第一集电器501电连接。如图5所示,第一表面500a上设置有第一活性材料502的中间部分505a比第二表面500b上设置有第一活性材料502的中间部分505b长,使得第一集电器501包括单侧部分507,即仅在第一集电器501的单侧表面上具有第一活性材料502的部分。在一些实施例中,第二极片510包括第二集电器511、第二活性材料512和第二极耳513,第二极片510与第一极片500可以采用基本相同的设置。图6展示了由图5所示的第一极片500、隔离膜520和第二极片510卷绕形成的电极组件,其中W2为所述电极组件卷绕后的宽度。
在一些实施例中,所述第一极片包括至少一个第一极耳,所述第一活性物质层设有至少一个第一凹槽,所述多个第一极耳分别设置在相应的所述至少一个第一凹槽内且电连接所述第一集电器,可如图7和图8所示。
在一些实施例中,所述至少一个第一极耳通过所述第一集电器裁切而成。
图7展示了根据本申请的又一实施例的第一极片。第一极片700包括第一集电器701、第一活性材料702和第一极耳703。第一活性材料702设置在第一集电器701的两个表面(即,第一表面700a和第二表面700b)上。第一集电器701沿卷绕方向包括涂覆区705a、705b以及未涂覆区706a、706b,第一活性材料702设置在第一集电器701的涂覆区705a、705b。第一极耳703通过所述第一集电 器701裁切而成。如图7所示,第一表面700b上设置有第一活性材料702的中间部分705a比第二表面700b上设置有第一活性材料702的中间部分705b长,使得第一集电器701包括单侧部分707,即仅在第一集电器701的单侧表面上具有第一活性材料702的部分。在一些实施例中,第二极片710包括第二集电器711、第二活性材料712和第二极耳713,第二极片710与第一极片700可以采用基本相同的设置。图8展示了由图7所示的第一极片700、隔离膜720和第二极片710卷绕形成的电极组件,其中W2为所述电极组件卷绕后的宽度。
在一些实施例中,所述粘接层设置于卷绕后的电极组件的至少一个平直段上。
在一些实施例中,所述粘接层包含聚丁二烯、聚丙二烯、聚戊二烯和苯乙烯或丁二烯共聚物中的至少一者和石油树脂。在一些实施例中,所述粘接层进一步包含木质粉、滑石粉或碳酸钙中的至少一者。
本申请的实施例还提供了一种电化学装置,其包括根据本申请任一实施例所述的电芯。本申请实施例的电化学装置包括发生电化学反应的任何装置,它的具体实例包括所有种类的一次电池、二次电池、燃料电池、太阳能电池或电容。特别地,该电化学装置是锂二次电池,包括锂金属二次电池、锂离子二次电池、锂聚合物二次电池或锂离子聚合物二次电池。
本申请实施例进一步提供一种电子装置,其包括根据本申请任一实施例所述的电化学装置。本申请的电化学装置包括发生电化学反应的任何装置,它的具体实例包括所有种类的一次电池、二次电池、燃料电池、太阳能电池或电容。特别地,该电化学装置是锂二次电池,包括锂金属二次电池、锂离子二次电池、锂聚合物二次电池或锂离子聚合物二次电池。在一些实施例中,本申请实施例的电化学装置包括具有能够嵌入和脱出金属离子的正极活性物质的正极极片、根据本申请的实施例的负极极片、电解液、和设置于正极极片和负极极片之间的隔离膜。
下面以锂离子电池为例并且结合具体的实施例说明软包装体的制备,本领域的技术人员将理解,本申请中描述的制备方法仅是实例,其他任何合适的制备方法均在本申请的范围内。
实施例
一、电芯的制备
将正极极片、隔离膜和负极极片依序放置,卷绕形成电极组件。在卷绕后的电极组件的外表面的一个平直段设置粘结物质,形成粘接层。将电极组件放置在 包装袋中,使粘接层与包装袋粘结,得到电芯。
二、测试方法
1、粘接面积率测试方法
测试粘接层的宽度和长度、电极组件的宽度和长度,通过下式计算粘接面积率a:
a=(W1×L1)/(W2×L2)
其中W1为所述粘接层的宽度,L1为所述粘接层的长度,W2为所述电极组件的宽度,及L2为所述电极组件的长度。
2、粘结力测试方法
将已放电至2.8V的电芯进行拆卸,保持包装袋和电极组件的粘接界面良好。将拆卸后的电芯放到冲切机中,进行冲切,制备成4-8mm小条。在钢板上贴上双面胶,将测试小条的电极组件面粘在双面胶上固定好。用同样宽度的硬纸片与包装袋一端固定好,得到待测试样品。
将钢板一端固定在万能拉力机(厂家:余姚市旭阳新能源有限公司)下端,纸条反拉180°固定在拉力机上端以50mm/min速度测试。测试完成后记录拉伸曲线平稳段的平均值。每组平行测试30个样品。
3、跌落安全性测试方法
取至少30个电芯样品,使其从一定高度(如1.5米)自由落体。若电芯样品不冒烟、不起火并且不漏液则记为通过。记录通过跌落安全性测试的样品率。
4、循环容量保持率测试方法
在45℃下,以0.8C的电流对电芯进行恒流充电至4.4V,再以4.4V电压对电芯进行恒压充电至0.2C,静置5min,然后以1C的电流对电芯进行恒流放电至3.0V,静置5min,记录首次放电容量,以同样方式循环500次(即重复执行上述步骤500次),测量第500次循环后的放电容量。通过下式计算电芯的循环容量保持率:
循环容量保持率=第500次循环后的放电容量/首次循环的放电容量×100%。
三、测试结果
表1展示了各对比例和实施例中粘接层的粘结面积率和粘结力以及电芯的跌落安全性和循环性能。
表1各对比例和实施例的测试结果
结果表明,当粘接层的粘接面积率a与粘接力F不满足
时,电芯的跌落安全性较差。当粘接层的粘接面积率a与粘接力F满足
时,电芯的跌落安全性得到显著改善。此外,在粘接层的粘接面积率a与粘接力F满足
的基础上,当粘接面积率a在20%至97%的范围内时,不会对电芯的循环容量保持率产生不利影响。
整个说明书中对“实施例”、“部分实施例”、“一个实施例”、“另一举例”、“举例”、“具体举例”或“部分举例”的引用,其所代表的意思是在本申请中的至少一个实施例或举例包含了该实施例或举例中所描述的特定特征、结构、材料或特性。因此,在整个说明书中的各处所出现的描述,例如:“在一些实施例中”、“在实施例中”、“在一个实施例中”、“在另一个举例中”,“在一个举例中”、“在特定举例中”或“举例“,其不必然是引用本申请中的相同的实施例或示例。此外,本文中的特定特征、结构、材料或特性可以以任何合适的方式在一个或多个实施例或举例中结合。
尽管已经演示和描述了说明性实施例,本领域技术人员应该理解上述实施例不能被解释为对本申请的限制,并且可以在不脱离本申请的精神、原理及范围的情况下对实施例进行改变,替代和修改。
Claims (10)
- 根据权利要求1所述的电芯,其中所述粘接面积率a不小于20%且不大于97%。
- 根据权利要求1所述的电芯,其中所述粘接力F不小于1N/m且不大于150N/m。
- 根据权利要求1所述的电芯,其中所述电极组件包括第一极片,所述第一极片包括第一集电器、第一活性材料层和第一极耳,所述第一活性材料层设置在所述第一集电器的至少一部分上,且所述第一集电器的起始端未设置所述第一活性材料层,并且其中所述第一极耳电连接所述第一集电器的起始端;或者所述第一活性物质层设有第一凹槽,所述第一极耳设置在所述第一凹槽内且电连接所述第一集电器。
- 根据权利要求1所述的电芯,其中所述电极组件包括第一极片,所述第一极片包括第一集电器、第一活性材料层和至少一个第一极耳,所述第一活性材料层设置在所述第一集电器的至少一部分上,所述第一活性物质层设有至少一个第一凹槽,所述至少一第一极耳分别设置在相应的所述至少一第一凹槽内且电连接所述第一集电器;或者所述至少一第一极耳通过所述第一集电器裁切而成。
- 根据权利要求1所述的电芯,其中所述粘接层为单层结构或多层结 构。
- 根据权利要求1所述的电芯,其中所述粘接层呈片状、点状或条状;或者所述粘接层具有规则形貌、不规则形貌或其组合。
- 根据权利要求1所述的电芯,其中所述粘接层连续地或不连续地设置于所述电极组件和所述包装袋之间。
- 一种电化学装置,其特征在于,包括根据权利要求1-8中任一权利要求所述的电芯。
- 一种电子装置,其包括根据权利要求9所述的电化学装置。
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113972422A (zh) * | 2021-10-22 | 2022-01-25 | 宁德新能源科技有限公司 | 电化学装置和电子装置 |
CN114335664A (zh) * | 2021-12-21 | 2022-04-12 | 宁德新能源科技有限公司 | 电化学装置以及电子设备 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11111250A (ja) * | 1997-10-06 | 1999-04-23 | Japan Storage Battery Co Ltd | 電 池 |
US20060251962A1 (en) * | 2005-04-26 | 2006-11-09 | Samsung Sdi Co., Ltd. | Secondary battery |
CN103459530A (zh) * | 2011-01-27 | 2013-12-18 | Lg化学株式会社 | 填充间隙用溶胀胶带 |
CN103597635A (zh) * | 2011-04-05 | 2014-02-19 | Lg化学株式会社 | 填充间隙用溶胀胶带 |
CN105355956A (zh) * | 2015-10-16 | 2016-02-24 | 广东烛光新能源科技有限公司 | 一种电化学电池及其制备方法 |
CN105390627A (zh) * | 2015-10-16 | 2016-03-09 | 广东烛光新能源科技有限公司 | 一种电化学电池及其制备方法 |
CN107863550A (zh) * | 2016-09-21 | 2018-03-30 | 三星Sdi株式会社 | 可再充电锂电池 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7003989B2 (ja) * | 2017-03-27 | 2022-02-10 | 日本ゼオン株式会社 | 電極構成体固定用接着剤及び電気化学素子 |
KR102388921B1 (ko) * | 2018-01-24 | 2022-04-21 | 삼성에스디아이 주식회사 | 이차 전지 및 그 제조 방법 |
-
2020
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Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11111250A (ja) * | 1997-10-06 | 1999-04-23 | Japan Storage Battery Co Ltd | 電 池 |
US20060251962A1 (en) * | 2005-04-26 | 2006-11-09 | Samsung Sdi Co., Ltd. | Secondary battery |
CN103459530A (zh) * | 2011-01-27 | 2013-12-18 | Lg化学株式会社 | 填充间隙用溶胀胶带 |
CN103597635A (zh) * | 2011-04-05 | 2014-02-19 | Lg化学株式会社 | 填充间隙用溶胀胶带 |
CN105355956A (zh) * | 2015-10-16 | 2016-02-24 | 广东烛光新能源科技有限公司 | 一种电化学电池及其制备方法 |
CN105390627A (zh) * | 2015-10-16 | 2016-03-09 | 广东烛光新能源科技有限公司 | 一种电化学电池及其制备方法 |
CN107863550A (zh) * | 2016-09-21 | 2018-03-30 | 三星Sdi株式会社 | 可再充电锂电池 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113972422A (zh) * | 2021-10-22 | 2022-01-25 | 宁德新能源科技有限公司 | 电化学装置和电子装置 |
CN114335664A (zh) * | 2021-12-21 | 2022-04-12 | 宁德新能源科技有限公司 | 电化学装置以及电子设备 |
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