Battery and electric equipment

Abstract

The utility model discloses a battery and electric equipment, the battery includes: a housing having a storage cavity, the cavity wall of the storage cavity includes a first body portion and a first protruding portion, the first protruding portion is connected to the first body portion and protrudes relative to the first body portion; the battery cell is arranged in the storage cavity; the bonding piece is arranged in the storage cavity, the bonding piece comprises a second body part and a second protruding part, the second body part comprises a first face and a second face which are opposite to each other, and the second protruding part is connected to the first face and protrudes relative to the first face; wherein the second surface is adhered to the battery cell, the second protruding part is adhered to the first body part, and the second body part is adhered to the first protruding part. The battery provided by the utility model can have relatively high safety.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery and electrical equipment. Background Technology

[0002] In related technologies, a battery includes a cell and a casing. The casing can be an aluminum-plastic film. After the aluminum-plastic film is perforated to form a storage cavity, the cell can be placed in the storage cavity. Then the aluminum-plastic film is heat-sealed, which completes the encapsulation of the cell.

[0003] Once the battery cell is placed in the storage chamber, if it is not secured during transportation, use, or when subjected to vibration / impact, internal displacement may occur, leading to electrode misalignment, separator tearing, or even short circuit. As a result, the battery's safety is relatively low. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a battery that has high safety.

[0005] This utility model also proposes an electrical device.

[0006] The battery according to a first aspect embodiment of the present invention includes:

[0007] The housing has a storage cavity, the cavity wall of which includes a first body portion and a first protrusion, the first protrusion being connected to the first body portion and protruding relative to the first body portion;

[0008] The battery cell is disposed in the storage cavity;

[0009] An adhesive component is disposed in the storage cavity. The adhesive component includes a second body portion and a second protrusion portion. The second body portion includes a first surface and a second surface facing each other. The second protrusion portion is connected to the first surface and protrudes relative to the first surface.

[0010] The second surface is bonded to the battery cell, the second protrusion is bonded to the first body portion, and the second body portion is bonded to the first protrusion.

[0011] The battery according to the embodiments of this utility model has at least the following beneficial effects: After the battery is placed in the storage cavity, the second side is bonded to the battery cell, the second protrusion is bonded to the first body portion, and the second body portion is bonded to the first protrusion portion. Therefore, the battery cell is bonded to the cavity wall of the storage cavity by adhesive, thereby achieving stable fixation of the battery cell in the casing. This can effectively prevent the battery cell from shifting in the storage cavity and improve the safety of the battery. Specifically, the battery can have high safety.

[0012] According to some embodiments of the present invention, the battery storage cavity wall includes a first wall and a second wall, the second wall surrounding the edge connected to the first wall, the first wall being located on one side in the thickness direction of the battery cell, and the first wall including a first body portion and a first protrusion portion.

[0013] According to some embodiments of the present invention, the battery has a first wall comprising a first heat-sealing layer, a first metal layer and a first outer layer stacked together, and a second wall comprising a second heat-sealing layer, a second metal layer and a second outer layer stacked together. The thickness of the first heat-sealing layer is less than the thickness of the second heat-sealing layer. The first heat-sealing layer comprises a first body portion and a first protrusion portion.

[0014] According to some embodiments of the present invention, the battery has a first wall comprising a first metal layer and a first outer layer stacked together, and a second wall comprising a second heat-sealing layer, a second metal layer and a second outer layer stacked together. The first metal layer comprises a first body portion and a first protrusion portion.

[0015] According to some embodiments of the present invention, the battery has a first wall comprising a first metal layer and a first outer layer stacked together, and a second wall comprising a second heat-sealing layer, a second metal layer and a second outer layer stacked together. The thickness of the first metal layer is less than the thickness of the second metal layer, and the first metal layer comprises a first body portion and a first protrusion portion.

[0016] According to some embodiments of the present invention, the battery of the storage cavity includes a first heat-sealing layer, a first metal layer and a first outer layer stacked together, wherein the first heat-sealing layer includes a first body portion and a first protrusion portion.

[0017] According to some embodiments of the present invention, the battery storage cavity wall includes a first metal layer and a first outer layer stacked together, wherein the first metal layer includes a first body portion and a first protrusion portion.

[0018] According to some embodiments of the present invention, the battery cell includes a straight portion and a curved portion, with two curved portions respectively connected to the two ends of the straight portion, and the second surface bonded to the curved portion.

[0019] According to some embodiments of the present invention, in the battery, along the thickness direction of the adhesive, the projection of the second protrusion falls within the projection range of the first body portion.

[0020] According to some embodiments of the present invention, in the battery, along the thickness direction of the adhesive, the projection of the first protrusion falls within the projection range of the second body portion.

[0021] According to some embodiments of the present invention, the projection of the adhesive member falls within the projection range of the cavity wall of the storage cavity along the thickness direction of the adhesive member.

[0022] The electrical device according to the second aspect of the present invention includes the battery described in any one of the first aspect embodiments.

[0023] The electrical device according to the embodiments of this utility model has at least the following beneficial effects: After the battery is placed in the storage cavity, the second side is bonded to the battery cell, the second protrusion is bonded to the first body portion, and the second body portion is bonded to the first protrusion portion. Therefore, the battery cell is bonded to the cavity wall of the storage cavity by adhesive, thereby achieving stable fixation of the battery cell in the housing. This can effectively prevent the battery cell from shifting in the storage cavity and improve battery safety. Specifically, the battery can have high safety. Furthermore, the electrical device with this battery also has high safety.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0026] Figure 1 This is a partial schematic diagram of the battery according to the first embodiment of the present invention;

[0027] Figure 2 This is a partial schematic diagram of the battery according to the second embodiment of the present invention;

[0028] Figure 3 This is a partial schematic diagram of the battery according to the third embodiment of the present invention;

[0029] Figure 4 This is a partial schematic diagram of the battery according to the fourth embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of a battery according to the first embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of a battery according to the second embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of a battery according to the third embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the adhesive component in a battery according to some embodiments of the present invention.

[0034] Figure label:

[0035] Battery 10, casing 100, storage cavity 200, first wall 210, second wall 220, first body portion 300, first protrusion 400, battery cell 500, adhesive 600, second body portion 610, first surface 611, second surface 612, second protrusion 620, first heat-sealing layer 700, first metal layer 710, first outer layer 720, second heat-sealing layer 800, second metal layer 810, second outer layer 820, straight portion 900, curved portion 910. Detailed Implementation

[0036] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0037] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0039] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0040] In the description of this utility model, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] The battery can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0042] A battery typically consists of a cell. The cell includes a positive electrode, a negative electrode, and a separator. During charging and discharging, active ions (such as lithium ions) move back and forth between the positive and negative electrodes, inserting and releasing. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0043] In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0044] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0045] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as a metal foil, it can be aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium, etc. Composite current collectors can include a polymer material base layer and a metal layer. Composite current collectors can be formed by forming a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0046] As an example, the positive electrode active material may include at least one of the following materials: lithium phosphate, lithium transition metal oxide, and their respective modified compounds. However, this application is not limited to these materials, and other conventional materials that can be used as battery positive electrode active materials may also be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of lithium phosphate include, but are not limited to, at least one of lithium iron phosphate (such as LiFePO4 (also referred to as LFP)), lithium iron phosphate and carbon composites, lithium manganese phosphate (such as LiMnPO4), lithium manganese phosphate and carbon composites, lithium iron manganese phosphate, and lithium iron manganese phosphate and carbon composites. Examples of lithium transition metal oxides include, but are not limited to, lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, and lithium nickel cobalt manganese oxide (such as LiNi). 1 / 3 Co 1 / 3 Mn 1 / 3 O2 (also known as NCM333), LiNi 0.5 Co 0.2 Mn 0.3 O2 (also known as NCM523), LiNi 0.5 Co 0.25 Mn 0.25 O2 (also known as NCM211), LiNi 0.6 Co 0.2 Mn 0.2 O2 (also known as NCM622), LiNi 0.8 Co 0.1 Mn 0.1 O2 (also known as NCM811), lithium nickel cobalt aluminum oxide (such as LiNi) 0.85 Co 0.15 Al 0.05 At least one of O2 and its modified compounds.

[0047] In some embodiments, the positive electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloys, etc. When foamed metal is used as the positive electrode, the surface of the foamed metal may or may not contain a positive electrode active material. As an example, lithium source material, potassium metal, or sodium metal can also be filled and / or deposited within the foamed metal, where the lithium source material is lithium metal and / or a lithium-rich material.

[0048] In some embodiments, the negative electrode may be a negative electrode sheet, and the negative electrode sheet may include a negative electrode current collector.

[0049] As an example, the negative electrode current collector can be a metal foil, a foamed metal, or a composite current collector. For example, as a metal foil, it can be silver-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, carbon electrode, nickel, or titanium, etc. Foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, etc. Composite current collectors can include a polymer material base layer and a metal layer. Composite current collectors can be formed by forming a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0050] As an example, the negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0051] As an example, the negative electrode current collector has two surfaces opposite each other in its own thickness direction, and the negative electrode active material is disposed on either or both of the two opposite surfaces of the negative electrode current collector.

[0052] As an example, the negative electrode active material may be a negative electrode active material known in the art for use in batteries. As an example, the negative electrode active material may include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. Silicon-based materials may be selected from at least one of elemental silicon, silicon oxide compounds, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. Tin-based materials may be selected from at least one of elemental tin, tin oxide compounds, and tin alloys. However, this application is not limited to these materials, and other conventional materials that can be used as negative electrode active materials for batteries may also be used. These negative electrode active materials may be used alone or in combination of two or more.

[0053] In some embodiments, the positive current collector can be made of aluminum, and the negative current collector can be made of copper.

[0054] In some implementations, the battery cell also includes an isolation element disposed between the positive and negative terminals.

[0055] In some embodiments, the separator is a separator membrane. The separator membrane can be of various types, and any known porous separator membrane with good chemical and mechanical stability can be selected.

[0056] As an example, the material of the separator may include at least one of glass fiber, nonwoven fabric, polyethylene, polypropylene, and polyvinylidene fluoride. The separator may be a single-layer film or a multi-layer composite film. When the separator is a multi-layer composite film, the materials of each layer may be the same or different. The separator may be a separate component located between the positive and negative electrodes, or it may be attached to the surfaces of the positive and negative electrodes.

[0057] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0058] In some embodiments, the battery also includes an electrolyte that acts as a conductor of ions between the positive and negative electrodes. The electrolyte can be liquid, gel-like, or solid. Liquid electrolytes include an electrolyte salt and a solvent.

[0059] In some embodiments, the electrolyte salt may include at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium dioxalate borate, lithium difluorodioxalate phosphate, and lithium tetrafluorooxalate phosphate.

[0060] In some embodiments, the solvent may include at least one selected from ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butyl carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent may also be an ether solvent. Ether solvents may include one or more selected from ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ethers.

[0061] Among them, the gel electrolyte includes a polymer as the electrolyte backbone network, combined with an ionic liquid - lithium salt.

[0062] Solid electrolytes include polymer solid electrolytes, inorganic solid electrolytes, and composite solid electrolytes.

[0063] As an example, polymer solid electrolytes can be polyethers (polyoxyethylene), polysiloxanes, polycarbonates, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, monoionic polymers, polyionic liquids-lithium salts, cellulose, etc.

[0064] As an example, inorganic solid electrolytes may include one or more of the following: oxide solid electrolytes (crystalline perovskite, sodium superconducting ion conductor, garnet, amorphous LiPON thin film), sulfide solid electrolytes (crystalline lithium superconducting ion conductor (lithium germanium phosphate sulfide, silver sulfide germanium ore), amorphous sulfides), halide solid electrolytes, nitride solid electrolytes, and hydride solid electrolytes.

[0065] As an example, composite solid electrolytes are formed by adding inorganic solid electrolyte fillers to polymer solid electrolytes.

[0066] In some implementations, the battery cell has a wound structure. The positive and negative electrode plates are wound into a wound structure.

[0067] In some implementations, the battery cell has a laminated structure.

[0068] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0069] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0070] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0071] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0072] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0073] In some implementations, the battery cell can be cylindrical, flat, or polygonal, etc.

[0074] In some implementations, the battery cell is provided with tabs that allow current to be drawn out of the cell. The tabs include a positive tab and a negative tab.

[0075] In some embodiments, the battery may include a casing. The casing is used to encapsulate components such as the battery cell and electrolyte. The casing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0076] As an example, the battery can be a cylindrical battery, a prismatic battery, a pouch battery, or a battery of other shapes. Prismatic batteries include, but are not limited to, square-shell batteries, blade-shaped batteries, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0077] The battery mentioned in the embodiments of this application refers to a single physical module that includes one or more batteries to provide higher voltage and capacity.

[0078] In some embodiments, the battery can be a battery module, and when there are multiple batteries, the multiple batteries are arranged and fixed to form a battery module.

[0079] In some embodiments, the battery may be a battery pack, which includes a housing and a battery, with the battery or battery module housed within the housing.

[0080] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0081] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0082] In related technologies, a battery includes a cell and a casing. The casing can be an aluminum-plastic film. After the aluminum-plastic film is perforated to form a storage cavity, the cell can be placed in the storage cavity. Then, the aluminum-plastic film is heat-sealed, which completes the encapsulation of the cell.

[0083] In this case, after the battery cell is placed in the storage cavity, if it is not secured during transportation, use, or when subjected to vibration / impact, internal displacement may occur, leading to electrode misalignment, separator tearing, or even short circuit. Thus, the battery safety is low. To address this, this application proposes a battery.

[0084] Please refer to Figures 1 to 8In some embodiments, the battery 10 includes a casing 100, a cell 500, and an adhesive 600. The casing 100 has a storage cavity 200, the shape of which is not specifically limited; for example, the shape of the storage cavity 200 can be a cube, cuboid, or polygon. The opening of the storage cavity 200 can be closed by a cover plate. The casing 100 can be made of metal, such as stainless steel, iron, or copper. The cavity wall of the storage cavity 200 includes a first body portion 300 and a first protrusion 400. The first protrusion 400 is connected to the first body portion 300 and protrudes relative to the first body portion 300. In other words, the cavity wall of the storage cavity 200 has grooves, the number and shape of which are not specifically limited. For example, the grooves can extend along the length direction of the casing 100 or along the width direction of the casing 100, or the grooves can extend along both the length and width directions of the casing 100. The grooves can be continuous or discontinuous. The number of grooves can be two, three, four, or ten or more. A cell 500 is disposed in the storage cavity 200, and the cell 500 includes a positive electrode, a separator, and a negative electrode. The separator is located between the positive and negative electrode. The cell 500 can be formed by stacking and winding the positive electrode, separator, and negative electrode, or it can be formed by stacking the positive electrode, separator, and negative electrode. This part is prior art and will not be described further here.

[0085] An adhesive 600 is disposed in the storage cavity 200. The adhesive 600 can be a hot melt adhesive, such as vinyl acetate polymer, polyamide, etc. The adhesive 600 can also be other adhesives, such as double-sided tape. Further, the adhesive 600 includes a second body portion 610 and a second protrusion 620. The second body portion 610 includes a first surface 611 and a second surface 612 facing each other. The second protrusion 620 is connected to the first surface 611 and protrudes relative to the first surface 611. After the second protrusion 620 protrudes relative to the first surface 611, one side of the adhesive 600 has a groove, which can improve the adhesion between the adhesive 600 and the cavity wall of the storage cavity 200. Specifically, the second surface 612 is bonded to the battery cell 500, the second protrusion 620 is bonded to the first body portion 300, and the second body portion 610 is bonded to the first protrusion 400. Specifically, after the battery 10 is placed in the storage cavity 200, the second surface 612 is bonded to the cell 500, the second protrusion 620 is bonded to the first body portion 300, and the second body portion 610 is bonded to the first protrusion 400. Therefore, the cell 500 is bonded to the cavity wall of the storage cavity 200 by the adhesive 600, thereby achieving stable fixation of the cell 500 in the housing 100. This effectively prevents the cell 500 from moving within the storage cavity 200, improving the safety of the battery 10. In essence, the battery 10 possesses high safety.

[0086] Continuing the explanation, the specific bonding method between the adhesive 600 and the cavity wall of the storage cavity 200 is as follows: the second protrusion 620 is bonded to the first body portion 300, and the second body portion 610 is bonded to the first protrusion 400. Specifically, for the cavity wall of the storage cavity 200, after the first protrusion 400 protrudes relative to the first body portion 300, a groove is formed on the cavity wall of the storage cavity 200. Similarly, for the first surface 611 of the adhesive 600, after the second protrusion 620 protrudes relative to the second body portion 610, a groove is formed on the adhesive 600. The connection between the cavity wall of the storage cavity 200 and the adhesive 600 is similar to a tooth-to-tooth meshing structure, which can further improve the bonding effect between the cavity wall of the storage cavity 200 and the adhesive 600, thereby making the battery cell 500 more firmly connected to the cavity wall of the storage cavity 200. Furthermore, the grooves formed by the first body portion 300 and the first protrusion 400 can be formed by laser cleaning.

[0087] Furthermore, in some embodiments, the thickness of the adhesive 600 can be 5μm to 20μm. For example, the thickness of the adhesive 600 can be 5μm, 6μm, 8μm, 9μm, 10μm, 12μm, 14μm, 16μm, 18μm, 19μm, or 20μm. The ratio of the thickness of the adhesive 600 to the thickness of the cell 500 is 0.2% to 0.5%, for example, it can be 0.2%, 0.3%, 0.4%, or 0.5%. When the ratio of the thickness of the adhesive 600 to the thickness of the cell 500 is small, the adhesion between the adhesive 600 and the cell 500 is poor, and after the battery 10 is dropped, the cell 500 may separate from the cavity wall of the storage chamber 200. When the ratio of the thickness of the adhesive 600 to the thickness of the cell 500 is large, this may result in a larger thickness of the battery 10, causing energy density loss.

[0088] Further, please refer to Figure 5 and Figure 6, in some embodiments, the cavity wall of the storage cavity 200 includes a first wall 210 and a second wall 220. The second wall 220 surrounds the edge connected to the first wall 210, and the first wall 210 is located on one side in the thickness direction of the battery cell 500. That is, the second wall 220 can be similar to a "hui" character shape, so that the second wall 220 surrounds and connects to the first wall 210 to form the storage cavity 200. In other words, in some orientations of the housing 100, the first wall 210 can be the bottom wall of the storage cavity 200, and the second wall 220 can be the side wall of the storage cavity 200. The first wall 210 includes a first body portion 300 and a first protrusion 400. That is, after the first body portion 300 and the first protrusion 400 are provided on the first wall 210, the first wall 210 can be connected to the large surface of the battery cell 500 through the bonding member 600, thereby improving the bonding effect. In addition, when the bonding member 600 is hot melt adhesive, a groove can be first provided on the first wall 210, and then a groove can be provided on the bonding member 600. After the grooves are engaged with each other, hot pressing is performed, which can improve the bonding effect between the bonding member 600 and the cavity wall of the storage cavity 200, thereby fixing the battery cell 500 and improving the safety of the battery 10.

[0089] Further, in some embodiments, after a second protrusion 620 is connected to the first surface 611 of the bonding member 600, a groove is formed in the bonding member 600. The depth of the groove can be one half of the thickness of the bonding member 600. After the bonding member 600 has a groove, when the bonding member 600 contacts the housing 100, the bubbles between the bonding member 600 and the housing 100 can be discharged through the groove, which can effectively improve the bonding effect between the bonding member 600 and the cavity wall of the storage cavity 200. In some other embodiments, the total area of the groove is S1, and the area of the bonding member 600 is S2, and 0.1 < S1 / S2 < 0.2.

[0090] Further, please refer to Figure 5In some embodiments, the first wall 210 includes a first heat-sealing layer 700, a first metal layer 710, and a first outer layer 720 stacked together. The first heat-sealing layer 700 may be made of PP, the first metal layer 710 may be made of aluminum, and the first outer layer 720 may be made of nylon. The second wall 220 includes a second heat-sealing layer 800, a second metal layer 810, and a second outer layer 820 stacked together. The second heat-sealing layer 800 may be made of PP, the second metal layer 810 may be made of aluminum, and the second outer layer 820 may be made of nylon. The thickness of the first heat-sealing layer 700 is less than the thickness of the second heat-sealing layer 800. The first heat-sealing layer 700 includes a first body portion 300 and a first protrusion 400. Specifically, the thickness of the first heat-sealing layer 700 is less than the thickness of the second heat-sealing layer 800, meaning the first heat-sealing layer 700 is thinned. This reduces the thickness of the first wall 210, which increases the capacity of the storage cavity 200, allowing for the placement of more battery cells 500 and improving the energy density of the battery 10. In essence, the battery 10 not only has high safety but also high energy density. Furthermore, in some other embodiments, the second heat-sealing layer 800 can also be thinned to further improve the energy density of the battery 10.

[0091] In some embodiments, the first wall 210 includes a first metal layer 710 and a first outer layer 720 stacked together. The first metal layer 710 may be made of aluminum, and the first outer layer 720 may be made of nylon. The second wall 220 includes a second heat-sealing layer 800, a second metal layer 810, and a second outer layer 820 stacked together. The second heat-sealing layer 800 may be made of PP, the second metal layer 810 may be made of aluminum, and the second outer layer 820 may be made of nylon. The first metal layer 710 includes a first body portion 300 and a first protrusion 400. Specifically, the first heat-sealing layer 700 is removed (there is no first heat-sealing layer 700 on the first wall 210), which reduces the thickness of the first wall 210. After the thickness of the first wall 210 is reduced, the capacity of the storage cavity 200 can be increased, thereby allowing more volume of battery cells 500 to be placed and improving the energy density of the battery 10. Specifically, the battery 10 not only has high safety but also high energy density.

[0092] In some embodiments, the first wall 210 includes a first metal layer 710 and a first outer layer 720 stacked together. The first heat-sealing layer 700 may be made of PP, the first metal layer 710 may be made of aluminum, and the first outer layer 720 may be made of nylon. The second wall 220 includes a second heat-sealing layer 800, a second metal layer 810, and a second outer layer 820 stacked together. The second heat-sealing layer 800 may be made of PP, the second metal layer 810 may be made of aluminum, and the second outer layer 820 may be made of nylon. The thickness of the first metal layer 710 is less than the thickness of the second metal layer 810. The first metal layer 710 includes a first body portion 300 and a first protrusion 400. Specifically, the thickness of the first metal layer 710 is less than the thickness of the second metal layer 810. That is, after removing the first heat-sealing layer 700, the first metal layer 710 is further thinned. This reduces the thickness of the first wall 210, which increases the capacity of the storage cavity 200, allowing for the placement of more battery cells 500 and improving the energy density of the battery 10. In essence, the battery 10 not only has high safety but also high energy density. The thickness of the first metal layer 710 can be 50%, 60%, 70%, 80%, 85%, or 90% of the thickness of the second metal layer 810.

[0093] Furthermore, in some embodiments, the cavity wall of the storage cavity 200 includes a first heat-sealing layer 700, a first metal layer 710, and a first outer layer 720 stacked together. The first heat-sealing layer 700 may be made of PP, the first metal layer 710 may be made of aluminum, and the first outer layer 720 may be made of nylon. The first heat-sealing layer 700 includes a first body portion 300 and a first protrusion 400. Specifically, the shell 100 may be made of aluminum-plastic film, and after the first body portion 300 and the first protrusion 400 are provided, the first heat-sealing layer 700 has a groove.

[0094] Furthermore, in some cases, in addition to providing grooves on the first heat-sealing layer 700 via the first body portion 300 and the first protrusion 400, grooves can also be provided on the first metal layer 710 via the first body portion 300 and the first protrusion 400. For details, please refer to... Figure 6In some embodiments, the cavity wall of the storage cavity 200 includes a first metal layer 710 and a first outer layer 720 stacked together. The first metal layer 710 may be made of aluminum, and the first outer layer 720 may be made of nylon. The first metal layer 710 includes a first body portion 300 and a first protrusion 400. In this embodiment, the first heat-sealing layer 700 on the first wall 210 is removed, which can further increase the volume of the storage cavity 200 and accommodate a larger volume of battery cell 500. In addition, after providing the first body portion 300 and the first protrusion 400 on the first metal layer 710, the adhesion between the adhesive 600 and the cavity wall of the storage cavity 200 can be improved, making the battery 10 safer.

[0095] Further, please refer to Figure 7 In some embodiments, the battery cell 500 includes a straight portion 900 and a bent portion 910, with two bent portions 910 respectively connected to both ends of the straight portion 900, and a second surface 612 bonded to the bent portion 910. Specifically, the battery cell 500 can be formed by winding a positive electrode sheet and a negative electrode sheet, wherein the shape of the battery cell 500 can be a flat cylindrical shape. The straight portion 900 refers to the straight part of the battery cell 500, and the bent portion 910 refers to the arc-shaped part of the battery cell 500. In this embodiment, the adhesive 600 is bonded to the bent portion 910, which can improve the space utilization of the storage cavity 200 and effectively keep the battery cell 500 fixed, thereby improving the safety of the battery 10.

[0096] Further, please refer to Figures 1 to 4 In some embodiments, the projection of the second protrusion 620 falls within the projection range of the first body portion 300 along the thickness direction of the adhesive 600. Specifically, the height of the second protrusion 620 is the same as the height of the first protrusion 400, which allows the first body portion 300 to connect to the second protrusion 620, and the second body portion 610 to connect to the first protrusion 400. Specifically, the projection of the second protrusion 620 falling within the projection range of the first body portion 300 along the thickness direction of the adhesive 600 can mean that the size of the second protrusion 620 is smaller than the size of the first body portion 300 along the width or length direction of the battery 10. This allows for a lateral connection between the second protrusion 620 and the first body portion 300, improving the adhesion between the adhesive 600 and the cavity wall of the storage cavity 200. The difference between the size of the second protrusion 620 and the size of the first body portion 300 can be between 1 mm and 3 mm.

[0097] Further, please refer to Figures 1 to 4In some embodiments, along the thickness direction of the adhesive 600, the projection of the first protrusion 400 falls within the projection range of the second body portion 610. Specifically, the height of the second protrusion 620 is the same as the height of the first protrusion 400, which allows the first body portion 300 to connect to the second protrusion 620, and the second body portion 610 to connect to the first protrusion 400. Specifically, the projection of the first protrusion 400 falling within the projection range of the second body portion 610 along the thickness direction of the adhesive 600 can be achieved by having the size of the first protrusion 400 smaller than the size of the second body portion 610 along the width or length direction of the battery 10. This allows for a lateral connection between the second protrusion 620 and the first body portion 300, improving the adhesion between the adhesive 600 and the cavity wall of the storage cavity 200. Furthermore, the shape of the first protrusion 400 can be rectangular, trapezoidal, or triangular, etc. In the width direction of the battery 10, the difference between the size of the first protrusion 400 and the size of the second body portion 610 can be 1mm to 2mm. In the length direction of the battery 10, the difference between the size of the first protrusion 400 and the size of the second body portion 610 can also be 1mm to 2mm.

[0098] Furthermore, in some embodiments, along the thickness direction of the adhesive 600, the projection of the adhesive 600 falls within the projection range of the cavity wall of the storage cavity 200. Specifically, "along the thickness direction of the adhesive 600, the projection of the adhesive 600 falls within the projection range of the cavity wall of the storage cavity 200" means that the length of the adhesive 600 is less than the length of the cavity wall of the storage cavity 200, and the width of the adhesive 600 is less than the width of the cavity wall of the storage cavity 200. The smaller projected area of ​​the adhesive 600 compared to the projected area of ​​the cavity wall of the storage cavity 200 provides greater tolerance when the adhesive 600 is placed on the cavity wall of the storage cavity 200, thus facilitating the installation of the adhesive 600. It should be noted that the cavity wall of the storage cavity 200 includes a first body portion 300 and a first protrusion 400. Therefore, even if there is a deviation in the placement position of the adhesive 600, the bonding effect between the adhesive 600 and the cavity wall of the storage cavity 200 will not be affected.

[0099] In some embodiments, the electrical device includes a battery 10 as described in any of the above embodiments. After the battery 10 is disposed in the storage cavity 200, the second surface 612 is bonded to the cell 500, the second protrusion 620 is bonded to the first body portion 300, and the second body portion 610 is bonded to the first protrusion 400. Therefore, the cell 500 is bonded to the cavity wall of the storage cavity 200 by the adhesive 600, thereby stably fixing the cell 500 in the housing 100. This effectively prevents the cell 500 from shifting within the storage cavity 200, improving the safety of the battery 10. Specifically, the battery 10 can have high safety. Furthermore, the electrical device having this battery 10 also has high safety.

[0100] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A battery, characterized in that, include: The housing has a storage cavity, the cavity wall of which includes a first body portion and a first protrusion, the first protrusion being connected to the first body portion and protruding relative to the first body portion; The battery cell is disposed in the storage cavity; An adhesive component is disposed in the storage cavity. The adhesive component includes a second body portion and a second protrusion portion. The second body portion includes a first surface and a second surface facing each other. The second protrusion portion is connected to the first surface and protrudes relative to the first surface. The second surface is bonded to the battery cell, the second protrusion is bonded to the first body portion, and the second body portion is bonded to the first protrusion.

2. The battery according to claim 1, characterized in that, The storage cavity wall includes a first wall and a second wall, the second wall surrounding the edge connected to the first wall, the first wall being located on one side in the thickness direction of the battery cell, and the first wall including the first body portion and the first protrusion portion.

3. The battery according to claim 2, characterized in that, The first wall includes a first heat-sealing layer, a first metal layer and a first outer layer stacked together, and the second wall includes a second heat-sealing layer, a second metal layer and a second outer layer stacked together. The thickness of the first heat-sealing layer is less than the thickness of the second heat-sealing layer. The first heat-sealing layer includes a first body portion and a first protrusion portion.

4. The battery according to claim 2, characterized in that, The first wall includes a first metal layer and a first outer layer stacked together, and the second wall includes a second heat-sealing layer, a second metal layer and a second outer layer stacked together. The first metal layer includes a first body portion and a first protrusion portion.

5. The battery according to claim 2, characterized in that, The first wall includes a first metal layer and a first outer layer stacked together, and the second wall includes a second heat-sealing layer, a second metal layer and a second outer layer stacked together. The thickness of the first metal layer is less than the thickness of the second metal layer. The first metal layer includes a first body portion and a first protrusion portion.

6. The battery according to claim 1, characterized in that, The cavity wall of the storage cavity includes a first heat-sealing layer, a first metal layer and a first outer layer stacked together, wherein the first heat-sealing layer includes a first body portion and a first protrusion portion.

7. The battery according to claim 1, characterized in that, The wall of the storage cavity includes a first metal layer and a first outer layer stacked together, the first metal layer including the first body portion and the first protrusion portion.

8. The battery according to claim 1, characterized in that, The battery cell includes a straight portion and a curved portion, with two curved portions respectively connected to the two ends of the straight portion, and the second surface is bonded to the curved portion.

9. The battery according to claim 1, characterized in that, Along the thickness direction of the adhesive, the projection of the second protrusion falls within the projection range of the first body portion.

10. The battery according to claim 1, characterized in that, Along the thickness direction of the adhesive, the projection of the first protrusion falls within the projection range of the second body portion.

11. The battery according to claim 1, characterized in that, Along the thickness direction of the adhesive, the projection of the adhesive falls within the projection range of the cavity wall of the storage cavity.

12. Electrical equipment, characterized in that, Includes the battery as described in any one of claims 1 to 11.

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