Battery and atomization device

Abstract

The utility model is suitable for the technical field of batteries, and discloses a battery and an atomization device. The battery comprises a shell, an electrode assembly and a first end cover assembly, the shell is provided with a containing cavity and a first opening, and the first opening communicates with the containing cavity. The electrode assembly is accommodated in the accommodating cavity and comprises a positive pole lug and a negative pole lug; the first end cover assembly comprises a first end cover, an electrode terminal and an insulating connecting piece; the first end cover is connected with the shell and covers the first opening, the insulating connecting piece is connected between the electrode terminal and the side, back to the containing cavity, of the first end cover in a hot melting mode, and one of the positive electrode lug and the negative electrode lug is electrically connected with the electrode terminal. The electrode terminal and the first end cover are connected in a hot melting manner by adopting the insulating connecting piece, so that the thickness of the first end cover assembly is reduced, the internal space of the battery is further increased, and the capacity density of the battery is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and an atomization device. Background Art

[0002] In battery technology, we need to consider both battery safety and battery performance. The battery capacity density affects the battery performance.

[0003] Currently, there are two main approaches to increasing battery capacity density: one is to increase the gram capacity of the positive and negative electrode materials, and the other is to improve the material's compaction. However, the current theoretical upper limit of material gram capacity has been reached, making further increases difficult. Increasing material compaction will also result in a decrease in the rate performance of the battery cell. Utility Model Content

[0004] The present application provides a battery and an atomization device, aiming to solve the technical problem of how to effectively improve the battery capacity density.

[0005] According to the first aspect of the present application, an embodiment provides a battery, comprising:

[0006] a housing, the housing having a receiving cavity and a first opening, the first opening communicating with the receiving cavity;

[0007] an electrode assembly, the electrode assembly being accommodated in the accommodating cavity and comprising a positive electrode tab and a negative electrode tab; and

[0008] A first end cap assembly, the first end cap assembly includes a first end cap, an electrode terminal and an insulating connector; the first end cap is connected to the outer shell and covers the first opening, the insulating connector is hot-melt connected between the electrode terminal and the side of the first end cap facing away from the accommodating cavity, and one of the positive electrode tab and the negative electrode tab is electrically connected to the electrode terminal.

[0009] In one embodiment, the insulating connector includes a first connecting piece and a second connecting piece that are stacked;

[0010] The electrode terminal is connected to the first connecting piece by heat-melting, the first end cover is connected to the second connecting piece by heat-melting, and the first connecting piece and the second connecting piece are connected to each other by heat-melting.

[0011] In one embodiment, the first connecting piece and the second connecting piece are both made of polypropylene films.

[0012] In one embodiment, the thickness of the first end cover assembly is a, and the value range of a is 0.4mm≤a≤0.6mm.

[0013] In one embodiment, the first end cover is provided with a mounting groove, the mounting groove extending along the thickness direction of the first end cover, and the notch of the mounting groove faces away from the accommodating cavity;

[0014] The electrode terminal is at least partially located in the mounting groove.

[0015] In one embodiment, the first end cover includes a bottom and a side portion, wherein the side portion is arranged around the circumference of the bottom and is combined with the bottom to form the installation groove;

[0016] The bottom is provided with a first side and a second side arranged opposite to each other along the thickness direction, the first side is arranged toward the mounting groove, and the second side is arranged toward the accommodating cavity; the insulating connector is hot-melt connected between the electrode terminal and the first side of the bottom, and the insulating connector protrudes from the electrode terminal in a direction perpendicular to the thickness direction.

[0017] In one embodiment, the first end cover further includes a connecting portion, the connecting portion protruding in all directions and arranged on the outer wall of the side portion;

[0018] The connecting portion is provided with a third side and a fourth side that are opposite to each other along the thickness direction. The fourth side of the connecting portion faces the housing and is mounted on an end portion of the housing.

[0019] In one embodiment, a through hole is formed through the bottom, and the through hole communicates with the mounting groove and the accommodating cavity;

[0020] At least a portion of one of the positive electrode tab and the negative electrode tab and / or the electrode terminal extends into the through hole, so that one of the positive electrode tab and the negative electrode tab contacts the electrode terminal.

[0021] In one embodiment, the electrode assembly further includes an electrode body, and the positive electrode tab and the negative electrode tab are respectively connected to opposite ends of the electrode body;

[0022] The housing includes a housing body and a second end cap assembly. The housing body is a tubular structure and is provided with a first opening and a second opening opposite to the first opening. The first end cap assembly and the second end cap assembly are respectively connected to opposite ends of the housing body. The second end cap assembly covers the second opening.

[0023] The positive electrode tab is connected to the first end cap assembly, and the negative electrode tab is connected to the second end cap assembly.

[0024] According to a second aspect of the present application, an embodiment provides an atomization device, comprising the battery of the first aspect described above.

[0025] According to the battery and atomizer device of the above-described embodiment, by heat-melting the insulating connector between the electrode terminal and the first end cap, the electrode terminal can be fixedly connected to the first end cap and insulated from the first end cap. Furthermore, the use of the insulating connector to heat-melt the electrode terminal and the first end cap can reduce the thickness of the first end cap assembly compared to a fixed connection using rivets. While the overall height of the battery is fixed, when the thickness of the first end cap assembly is reduced, the height of the interior of the housing is correspondingly increased, thereby increasing the space inside the battery and thereby improving the battery's capacity density. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 An exploded view of a battery provided in an embodiment of the present application;

[0027] Figure 2 A cross-sectional view of a battery provided in an embodiment of the present application;

[0028] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0029] Figure 4 for Figure 2 A partial enlarged view of point B in the middle;

[0030] Figure 5 A schematic structural diagram of a first end cap provided in an embodiment of the present application from one perspective;

[0031] Figure 6 A schematic structural diagram of the first end cap provided in an embodiment of the present application from another perspective;

[0032] Figure 7 A cross-sectional view of a first end cap provided in an embodiment of the present application;

[0033] Figure 8 A schematic structural diagram of an electrode terminal provided in an embodiment of the present application from one perspective;

[0034] Figure 9 A schematic structural diagram of an electrode terminal provided in an embodiment of the present application from another perspective;

[0035] Figure 10 A cross-sectional view of an electrode terminal provided in an embodiment of the present application;

[0036] Figure 11 A schematic structural diagram of the second end cover provided in an embodiment of the present application;

[0037] Figure 12 This is a schematic diagram of the structure of the atomization device provided in an embodiment of the present application.

[0038] In the picture:

[0039] 100, battery; 10, housing; 11, accommodating cavity; 12, first opening; 13, second opening; 14, housing body; 15, second end cap assembly; 151, second end cap; 1511, injection port; 152, seal; 20, electrode assembly; 21, positive electrode tab; 22, negative electrode tab; 23, electrode body; 30, first end cap assembly; 31, first end cap; 311, mounting slot; 312, bottom; 3121, first side; 3122, second side; 313, side; 314, connecting portion; 3141, third side; 3142, fourth side; 315, through hole; 32, electrode terminal; 321, main body; 3211, first surface; 3212, second surface; 322, protrusion; 33, insulating connector; 331, first connecting piece; 332, second connecting piece; 40, partition; 200, atomizer. DETAILED DESCRIPTION

[0040] The present application is further described in detail below by means of specific embodiments in conjunction with the accompanying drawings. Similar elements in different embodiments are numbered with associated similar elements. In the following embodiments, many detailed descriptions are provided to enable the present application to be better understood. However, those skilled in the art will readily appreciate that some of the features may be omitted in different circumstances, or may be replaced by other elements, materials, or methods. In some cases, some operations related to the present application are not shown or described in the specification. This is to avoid the core portion of the present application being overwhelmed by excessive descriptions. For those skilled in the art, it is not necessary to describe these related operations in detail. They can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0041] In addition, the features, operations, or characteristics described in the specification may be combined in any appropriate manner to form various implementations, and the operational steps involved in each embodiment may be interchanged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a particular embodiment and do not imply a required composition and / or sequence.

[0042] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings).

[0043] In this application, batteries may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, and the embodiments of this application are not limited thereto. Batteries may be cylindrical, flat, rectangular, or in other shapes, and the embodiments of this application are not limited thereto.

[0044] A battery includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. Batteries operate primarily by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive electrode collector. The uncoated positive electrode collector protrudes from the coated positive electrode collector, and the uncoated positive electrode collector serves as the positive electrode tab. For lithium-ion batteries, for example, the positive electrode current collector can be made of aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode sheet includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative electrode collector. The uncoated negative electrode collector protrudes from the coated negative electrode collector, and the uncoated negative electrode collector serves as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon. The separator can be made of materials such as PP (polypropylene) or PE (polyethylene). Furthermore, the electrode assembly can be a wound or laminated structure, but the present invention is not limited thereto.

[0045] The battery provided in the embodiments of the present application is suitable for use in electrical equipment that uses the battery.

[0046] Electrical equipment can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, electric tools and atomizing devices, etc. Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.; spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc.; atomizing devices include atomizing devices that heat liquid aerosols to generate substrates and atomizing devices that heat solid aerosols to generate substrates. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical equipment.

[0047] For the convenience of description, the following embodiments are described by taking the electrical equipment as an atomizing device as an example.

[0048] In some embodiments, the atomization device includes an atomizer and a battery. The battery is used to power the atomizer, and the atomizer is used to heat an aerosol-generating substrate to generate an aerosol. Specifically, the atomizer includes a heating element. The battery is electrically connected to the heating element and is used to power the heating element. When the heating element is powered, it heats the aerosol-generating substrate to generate an aerosol.

[0049] The battery includes a housing, an electrode assembly, and an end cap assembly.

[0050] The shell is a component used to accommodate the electrode assembly and the electrolyte. The shell can be a hollow structure with an opening at one end, or a hollow structure with openings at both ends. Figure 1 As shown, the housing is a hollow structure with openings at both ends. The housing can have various shapes, such as a cylinder, a cuboid, etc. The housing can be made of various materials, such as copper, iron, aluminum, steel, aluminum alloy, etc.

[0051] The electrode assembly in the housing can be one or more. Figure 1 As shown, there is one electrode assembly.

[0052] The electrode assembly is the component in a battery where the electrochemical reaction occurs. It can include a positive electrode sheet, a negative electrode sheet, and a separator. The electrode assembly can be a wound structure formed by winding the positive electrode sheet, separator, and negative electrode sheet, or a stacked structure formed by stacking the positive electrode sheet, separator, and negative electrode sheet.

[0053] The electrode assembly has a positive tab and a negative tab. The positive tab is the portion of the positive electrode sheet not coated with the positive active material layer, and the negative tab is the portion of the negative electrode sheet not coated with the negative active material layer. The positive tab and the negative tab serve as the positive output electrode and negative output electrode of the electrode assembly, respectively.

[0054] The end cap assembly is a component that covers the opening of the outer shell to isolate the internal environment of the battery from the external environment. If the outer shell is a hollow structure with openings at both ends, two end cap assemblies can be provided. If the outer shell is a hollow structure with an opening at one end, only one end cap assembly can be provided.

[0055] The development of battery technology must consider multiple design factors simultaneously, such as capacity density, cycle life, discharge capacity, charge and discharge rate and other performance parameters.

[0056] In a battery, an end cap assembly generally includes an end cap, an electrode terminal and a connecting component. The electrode terminal is connected to the end cap through the connecting component. The electrode terminal is used to electrically connect to the electrode assembly. The electrode terminal is the component that outputs electrical energy from the battery.

[0057] In the related art, since the electrode terminal is riveted to the end cover through a connecting component, the thickness of the end cover assembly is too large, which in turn causes the space inside the battery to shrink, affecting the capacity density of the battery.

[0058] In view of this, embodiments of the present application provide a battery and an atomizer. The battery's first end cap assembly includes a first end cap, an electrode terminal, and an insulating connector, wherein the insulating connector is heat-fused between the electrode terminal and the first end cap. Heat-fusion bonding of the electrode terminal and the first end cap by the insulating connector reduces the thickness of the first end cap assembly, thereby increasing the internal space of the battery and facilitating improved battery capacity density.

[0059] See also Figures 1 to 4 The present invention provides a battery 100 including a housing 10, an electrode assembly 20, and a first end cap assembly 30. The housing 10 has a receiving cavity 11 and a first opening 12. The first opening 12 communicates with the receiving cavity 11. The electrode assembly 20 is received in the receiving cavity 11. The first end cap assembly 30 is connected to the housing 10 and covers the first opening 12.

[0060] The electrode assembly 20 includes a positive electrode tab 21 and a negative electrode tab 22. The first end cover assembly 30 includes a first end cover 31, an electrode terminal 32 and an insulating connector 33. The first end cover 31 is connected to the outer shell 10 and covers the first opening 12. The insulating connector 33 is hot-melt connected between the electrode terminal 32 and the side of the first end cover 31 facing away from the accommodating cavity 11. One of the positive electrode tab 21 and the negative electrode tab 22 is electrically connected to the electrode terminal 32.

[0061] Using the above technical solution, one of the positive electrode tab 21 or the negative electrode tab 22 of the electrode assembly 20 is electrically connected to the electrode terminal 32, enabling the electrode terminal 32 to output electrical energy. By heat-sealably connecting the insulating connector 33 between the electrode terminal 32 and the first end cap 31, the electrode terminal 32 is fixedly connected to the first end cap 31 and insulated from the first end cap 31. Furthermore, using the insulating connector 33 to heat-seal the electrode terminal 32 and the first end cap 31 reduces the thickness of the first end cap assembly 30 compared to a fixed connection using rivets. While the overall height of the battery 100 remains constant, reducing the thickness of the first end cap assembly 30 increases the interior height of the outer casing 10. Consequently, the space within the battery 100 is increased, thereby improving the capacity density of the battery 100.

[0062] In one embodiment, the electrode terminal 32 is made of pure aluminum.

[0063] In one embodiment, the insulating connector 33 is thermally fused between the electrode terminal 32 and the side of the first end cap 31 facing away from the accommodating cavity 11 using ultrasonic welding. Ultrasonic welding utilizes high-frequency vibration waves transmitted to the surfaces of two objects to be welded. Under pressure, the surfaces rub against each other, forming a molecular fusion bond. Ultrasonic welding can accelerate welding speed and increase weld strength.

[0064] See also Figure 3 The insulating connector 33 includes a first connecting piece 331 and a second connecting piece 332, which are stacked. The electrode terminal 32 is connected to the first connecting piece 331 by heat-melting, and the first end cap 31 is connected to the second connecting piece 332 by heat-melting. The first connecting piece 331 and the second connecting piece 332 are also connected to each other by heat-melting. In a specific implementation, the electrode terminal 32 is connected to the first connecting piece 331 by ultrasonic welding, the first end cap 31 is connected to the second connecting piece 332 by ultrasonic welding, and then the first connecting piece 331 and the second connecting piece 332 are connected by ultrasonic welding.

[0065] In one embodiment, the first connecting piece 331 and the second connecting piece 332 are both polypropylene films. Polypropylene has excellent electrical insulation properties, and using polypropylene films as the first connecting piece 331 and the second connecting piece 332 facilitates insulation between the first end cap 31 and the electrode terminal 32. It is understood that in other embodiments, the first connecting piece 331 and the second connecting piece 332 may also be films made of other insulating materials.

[0066] In one embodiment, the thickness of the first end cap assembly 30 is a, and the value range of a is 0.4 mm ≤ a ≤ 0.6 mm. In specific implementations, the thickness of the first end cap assembly 30 can be 0.4 mm, 0.43 mm, 0.46 mm, 0.5 mm, 0.52 mm, 0.55 mm, 0.57 mm, 0.6 mm, etc.

[0067] See also Figure 1 and Figure 3 The first end cap 31 is provided with a mounting groove 311, which extends along the thickness direction X of the first end cap 31, with the notch of the mounting groove 311 facing away from the accommodating cavity 11. The electrode terminal 32 is at least partially located within the mounting groove 311. By providing the mounting groove 311 along the thickness direction X of the first end cap 31, with the notch facing away from the accommodating cavity 11, and positioning the electrode terminal 32 within the mounting groove 311, the combined thickness of the first end cap 31 and the electrode terminal 32 can be reduced compared to a technical solution in which the first end cap 31 is not provided with the mounting groove 311. Therefore, the thickness of the first end cap assembly 30 can be reduced, thereby increasing the space inside the battery 100 and improving the capacity density of the battery 100.

[0068] In one embodiment, the electrode terminal 32 is lower than the notch of the mounting groove 311. This configuration allows the electrode terminal 32 to be completely received in the mounting groove 311. It is understood that in other embodiments, the electrode terminal 32 may also be flush with the notch of the mounting groove 311.

[0069] See also Figure 3 、 Figures 5 to 7 The first end cap 31 includes a bottom portion 312 and a side portion 313. The side portion 313 is disposed around the bottom portion 312 and, together with the bottom portion 312, forms a mounting groove 311. The bottom portion 312 has a first side 3121 and a second side 3122 disposed opposite each other along the thickness direction X. The first side 3121 faces the mounting groove 311, and the second side 3122 faces the accommodating cavity 11. The insulating connector 33 is heat-fused connected between the electrode terminal 32 and the first side 3121 of the bottom portion 312. The first side 3121 of the bottom portion 312 forms the bottom wall of the mounting groove 311. Therefore, the insulating connector 33 is heat-fused connected between the electrode terminal 32 and the bottom wall of the mounting groove 311.

[0070] In one embodiment, the insulating connector 33 protrudes from the electrode terminal 32 in a direction perpendicular to the thickness direction X. Thus, the circumference of the insulating connector 33 is closer to the sidewalls of the mounting groove 311 than the circumference of the electrode terminal 32. In other words, there is a gap between the circumference of the electrode terminal 32 and the sidewalls of the mounting groove 311. This allows for insulation between the electrode terminal 32 and the sidewalls of the mounting groove 311.

[0071] See also Figure 3 、 Figures 5 to 7 The first end cap 31 further includes a connecting portion 314, which protrudes from the outer wall of the side portion 313 and is used to connect to the housing 10. In a specific implementation, the connecting portion 314 of the first end cap 31 is connected to the housing 10 via a laser welding process. Of course, in a specific application, as an alternative embodiment, the first end cap 31 may also be provided with no connecting portion 314.

[0072] See also Figure 3 and Figure 7 The connecting portion 314 has a third side 3141 and a fourth side 3142 that are oppositely disposed along the thickness direction X. The third side 3141 of the connecting portion 314 faces away from the housing 10, and the fourth side 3142 of the connecting portion 314 faces the housing 10 and is mounted on the end of the housing 10. In a specific implementation, the fourth side 3142 of the connecting portion 314 is mounted on the end of the housing 10 where the first opening 12 is provided by a laser welding process, thereby achieving the connection between the first end cap 31 and the housing 10.

[0073] In one embodiment, the first side 3121 of the bottom portion 312 is further away from the third side 3141 of the connecting portion 314 than the fourth side 3142 of the connecting portion 314. This configuration increases the depth of the mounting groove 311 and provides more space for the electrode terminal 32.

[0074] See also Figures 3 to 7 , a through hole 315 is provided through the bottom 312, and the through hole 315 connects the mounting groove 311 and the accommodating cavity 11. At least a portion of one of the positive electrode tab 21 and the negative electrode tab 22 and / or the electrode terminal 32 extends into the through hole 315, so that one of the positive electrode tab 21 and the negative electrode tab 22 is in contact with the electrode terminal 32. In this way, one of the positive electrode tab 21 and the negative electrode tab 22 can be electrically connected to the electrode terminal 32. In a specific implementation, one of the positive electrode tab 21 and the negative electrode tab 22 is connected to the electrode terminal 32 through a laser welding process. In this embodiment, one of the positive electrode tab 21 and the negative electrode tab 22 is directly connected to the electrode terminal 32. In other embodiments, one of the positive electrode tab 21 and the negative electrode tab 22 can also be connected to the electrode terminal 32 at a distance.

[0075] In one embodiment, a portion of the electrode terminal 32 extends into the through hole 315, and the positive electrode tab 21 contacts the electrode terminal 32. Figures 1 to 4 、 Figures 7 to 10 The electrode terminal 32 includes a body portion 321 and a protrusion 322. The body portion 321 includes a first surface 3211 and a second surface 3212 disposed opposite each other along the thickness direction X. The insulating connector 33 is connected between the second surface 3212 of the body portion 321 and the first side 3121 of the bottom portion 312. The protrusion 322 protrudes from the second surface 3212 of the body portion 321 in a direction away from the first surface 3211 and extends into the through-hole 315. The electrode assembly 20 also includes an electrode body 23. The positive electrode tab 21 and the negative electrode tab 22 are respectively connected to opposite ends of the electrode body 23. The negative electrode tab 22 is disposed away from the first opening 12, while the positive electrode tab 21 is disposed toward the first opening 12. A portion of the positive electrode tab 21 is aligned with the through-hole 315. This arrangement allows a portion of the electrode terminal 32 to extend into the through-hole 315, thereby contacting the positive electrode tab 21. Of course, in a specific application, as an alternative implementation scheme, the electrode terminal 32 may not be provided with the protrusion 322 . When this technical solution is adopted, part of the positive electrode tab 21 extends into the through hole 315 to contact the electrode terminal 32 .

[0076] See also Figures 1 to 4The housing 10 includes a housing body 14 and a second end cap assembly 15. The housing body 14 is tubular and has a first opening 12 and a second opening 13 disposed opposite the first opening 12. The first end cap assembly 30 and the second end cap assembly 15 are respectively connected to opposite ends of the housing body 14. The second end cap assembly 15 covers the second opening 13. The positive electrode tab 21 is connected to the first end cap assembly 30, and the negative electrode tab 22 is connected to the second end cap assembly 15. In a specific implementation, the first end cap 31 is connected to the housing body 14 and covers the first opening 12. It is understood that in other embodiments, the housing 10 may not be provided with the second end cap assembly 15. When adopting this technical solution, the housing body 14 may not be provided with the second opening 13.

[0077] See also Figure 1 、 Figure 4 and Figure 11 The second end cover assembly 15 includes a second end cover 151 and a sealing member 152. The second end cover 151 is connected to the outer shell 10 and covers the second opening 13. The second end cover 151 is penetrated by an injection hole 1511, and the injection hole 1511 is used to inject electrolyte. The sealing member 152 is connected to the second end cover 151 and is used to seal the injection hole 1511. Among them, the negative electrode tab 22 of the electrode assembly 20 is arranged toward the second opening 13 and contacts the second end cover 151 so that the negative electrode tab 22 is electrically connected to the second end cover 151. In a specific implementation, the second end cover 151 and the outer shell 10, the second end cover 151 and the sealing member 152, and the second end cover 151 and the negative electrode tab 22 are all connected by a laser welding process.

[0078] The shapes of the first end cap 31 and the second end cap 151 can be adapted to the shape of the housing 10. For example, if the housing 10 is a tubular structure with a rectangular cross section, the first end cap 31 and the second end cap 151 can be rectangular plate structures adapted to the housing 10. For another example, if the housing 10 is a tubular structure with a circular cross section, the first end cap 31 and the second end cap 151 can be circular plate structures adapted to the housing 10. In this embodiment, the housing 10 is a tubular structure with a circular cross section, and the first end cap 31 and the second end cap 151 are both circular plate structures.

[0079] The first end cap 31 and the second end cap 151 may be made of a variety of materials, such as copper, iron, aluminum, steel, aluminum alloy, stainless steel, etc. The material of the first end cap 31 and the second end cap 151 may be the same as or different from the material of the housing 10. In this embodiment, the first end cap 31 and the second end cap 151 are made of the same material as the housing 10, that is, stainless steel.

[0080] See also Figure 1 and Figure 3The battery 100 further includes a separator 40, which is disposed on a side of the first end cap 31 facing the accommodating cavity 11. The separator 40 is used to insulate the first end cap 31 from the electrode assembly 20 in the accommodating cavity 11. The separator 40 is made of an insulating material, such as plastic, rubber, or the like.

[0081] The preparation method of the battery 100 provided in the embodiment of the present application is as follows:

[0082] 1) preparing a first end cap assembly: heat-melting the electrode terminal to the first connecting piece by ultrasonic welding, heat-melting the second connecting piece to the first end cap by ultrasonic welding, and then heat-melting the first connecting piece to the second connecting piece by ultrasonic welding;

[0083] 2) preparing an electrode assembly;

[0084] 3) Assembly: A separator is attached to the side of the first end cap facing away from the insulating connector, and then the positive electrode tab of the electrode assembly and the electrode terminal are connected by laser welding. A housing is placed around the periphery of the electrode assembly and the housing and the first end cap are connected by laser welding. The negative electrode tab of the electrode assembly and the second end cap are then connected by laser welding. The housing and the second end cap are then connected by laser welding, and the electrolyte is injected through the injection hole. Finally, the seal is connected to the second end cap by laser welding to seal the injection hole.

[0085] 4) Let it stand and charge to complete the battery production.

[0086] The embodiment of the present application further provides an atomization device, comprising the above-mentioned battery 100.

[0087] In one embodiment, see Figure 12 The atomizer device includes a cigarette rod and an atomizer 200. The cigarette rod includes the aforementioned battery 100 and a housing for accommodating the battery 100. The atomizer 200 is connected to the cigarette rod, and the battery 100 provides power to the atomizer 200. The aerosol-generating substrate is placed in the atomizer 200. In another embodiment, the atomizer device may include the cigarette rod but not the atomizer 200. When using this technical solution, the cigarette cartridge is placed in the housing.

[0088] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. Those skilled in the art of the present invention can make some simple deductions, modifications or substitutions based on the concept of the present invention.

Claims

1. A battery, characterized in that: include: a housing, the housing having a receiving cavity and a first opening, the first opening communicating with the receiving cavity; an electrode assembly, the electrode assembly being accommodated in the accommodating cavity and comprising a positive electrode tab and a negative electrode tab; as well as A first end cap assembly, the first end cap assembly includes a first end cap, an electrode terminal and an insulating connector; the first end cap is connected to the outer shell and covers the first opening, the insulating connector is hot-melt connected between the electrode terminal and the side of the first end cap facing away from the accommodating cavity, and one of the positive electrode tab and the negative electrode tab is electrically connected to the electrode terminal.

2. The battery according to claim 1, wherein The insulating connector includes a first connecting piece and a second connecting piece that are stacked; The electrode terminal is connected to the first connecting piece by heat-melting, the first end cover is connected to the second connecting piece by heat-melting, and the first connecting piece and the second connecting piece are connected to each other by heat-melting.

3. The battery according to claim 2, wherein The first connecting piece and the second connecting piece are both polypropylene films.

4. The battery according to claim 1, wherein The thickness of the first end cover assembly is a, and the value range of a is 0.4mm≤a≤0.6mm.

5. The battery according to any one of claims 1 to 4, characterized in that The first end cover is provided with a mounting groove, the mounting groove extending along the thickness direction of the first end cover, and the notch of the mounting groove faces away from the accommodating cavity; The electrode terminal is at least partially located in the mounting groove.

6. The battery according to claim 5, wherein The first end cover includes a bottom and a side portion, wherein the side portion is arranged around the circumference of the bottom and is combined with the bottom to form the installation groove; The bottom is provided with a first side and a second side arranged opposite to each other along the thickness direction, the first side is arranged toward the mounting groove, and the second side is arranged toward the accommodating cavity; the insulating connector is hot-melt connected between the electrode terminal and the first side of the bottom, and the insulating connector protrudes from the electrode terminal in a direction perpendicular to the thickness direction.

7. The battery according to claim 6, wherein The first end cover further includes a connecting portion, which protrudes in all directions and is arranged on the outer wall of the side portion; The connecting portion is provided with a third side and a fourth side that are opposite to each other along the thickness direction. The fourth side of the connecting portion faces the housing and is mounted on an end portion of the housing.

8. The battery according to claim 6, wherein A through hole is formed through the bottom, and the through hole communicates with the mounting groove and the accommodating cavity; At least a portion of one of the positive electrode tab and the negative electrode tab and / or the electrode terminal extends into the through hole, so that one of the positive electrode tab and the negative electrode tab contacts the electrode terminal.

9. The battery according to any one of claims 1 to 4, characterized in that The electrode assembly further includes an electrode body, wherein the positive electrode tab and the negative electrode tab are respectively connected to opposite ends of the electrode body; The housing includes a housing body and a second end cap assembly. The housing body is a tubular structure and is provided with a first opening and a second opening opposite to the first opening. The first end cap assembly and the second end cap assembly are respectively connected to opposite ends of the housing body. The second end cap assembly covers the second opening. The positive electrode tab is connected to the first end cap assembly, and the negative electrode tab is connected to the second end cap assembly.

10. An atomizing device, characterized in that: Comprising the battery according to any one of claims 1 to 9.

Images