Battery and electronic equipment

A battery and electrode technology, applied in the field of batteries and electronic equipment, can solve the problems of separation, the reliability of the tab or the adapter and the shell is difficult to ensure, and achieve the effects of reducing impact, improving connection reliability and long service life.

Pending Publication Date: 2022-07-08
NINGDE AMPEREX TECH
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AI-Extracted Technical Summary

Problems solved by technology

[0003] Existing lithium-ion batteries usually use tabs or tabs to be welded with adapters and then welded to poles or shells to ensure the electrical connection between ...
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Method used

[0092] By adopting the above-mentioned battery, the first conductive part has a first surface connected to the electrode, and at the same time, a first member is provided on the second surface of the first conductive part, so that the electrode assembly can be buffered when the battery is subjected to an external impact The impact of other parts of the first conductive part on the first conductive part improves the connection reliability between the first conductive part and the electrode. In addition, in order to ensure the reliability of the connection in the process of preparing the battery, it is required that the tabs or adapters of the bare cells after being put into the case are closely attached to the case or the pole. To solve this problem, a pressing knife is usually used to enter the case , the pressing knife is inserted between the bare cell and the tab or the adapter piece, and presses the tab or the adapter piece during welding, so that the tab or the adapter piece is in close contact with the shell or the pole. However, it is difficult to debug and control the accuracy and stroke of the pressing knife into the shell, and during the welding process, because the pressing knife needs to press the tab or the adapter piece, it is easy to cause the welding between the pressing knife and the tab or the adapter piece, thereby As a result, the flatness of the surface of the pressing knife is reduced, and it is difficult to ensure the close contact between the lug or the adapter piece and the shell or pole during the subsequent welding process. However, by arranging the first member on the second surface of the first conductive part, The first part is located between the first conductive part and the press knife, so that the press knife can press the first conductive part and the electrode tightly, ensuring the reliability of welding between the first conductive part and the electrode. In addition, due to the isolation of the first part The function can avoid the damage to the pressure knife during the welding process, thereby simplifying the production process and reducing the production cost.
[0093] Embodiments of the present application also provide an electronic device, which includes the above-mentioned battery. By using the battery, the electronic equipment improves its own reliability, and because the cost of the battery is reduced, the cost of the electronic equipment is also reduced as a whole.
[0098] Referring to FIG. 1 and FIG. 2, the second wall 112 includes a curved second region 1121 and a flat third region 1122, and the second region 1121 and the third region 1122 are connected. Further, the first opening 113 is provided in the third area 1122, so that the casing 10 can better fix the second electrode 30, and lift the casing 10 and the second electrode 30 Of course, it is also feasible to dispose the first opening 113 in a curved region such as the second region 1121 , and then dispose the second electrode 30 in the first opening 113 . The second wall 112 includes a curved second region 1121 , in order to be further compatible with the electrode assembly 20 , and the curved second region 1121 is provided to increase the accommodation space of the housing 10 , The electrode assembly 20 with larger volume can be accommodated, and the overall energy density of the battery 100 can be improved.
[0099] Referring to FIGS. 1 and 3, the first cover 12 includes a third wall 121, and the first cover 12 is fixed on the second wall 112 to cover the first recess 114. In one embodiment, the third wall 121 is provided with a second opening 1211, and the second opening 1211 is located closer to the first opening 113 than the geometric center of the third wall 121. position, electrolyte solution can be injected into the bottom case 11 through the second opening 1211 . In order to be able to cover the second opening 1211, the first cover 12 also includes a second cover 122, the second cover 122 is arranged at the position of the second opening 1211, and faces the housing. The inside of the housing 10 extends to cover the second opening 1211 , preventing liquid, such as water, from flowing into the housing 10 from the second opening 1211 , and preventing electrolyte from flowing out from the second opening 1211 . Setting the second opening 1211 close to the first opening 113 can improve the liquid injection efficiency.
[0112] By providing the second transfer portion 244, the connection between the electrode assembly 20 and the casing 10 is more convenient. It can be understood that, in other embodiments, the second transfer portion 244 can also be cancelled, and the second metal portion 243 can be extended, so that the second metal portion 243 directly connects with the casing 10 connect.
[0118] In some embodiments, when the first member 40 is disposed between the first conductive portion 23 and the main body of the electrode assembly 20, an interference fit is used, so that the first conductive portion 23 passes through the The extrusion of the first member 40 is closely attached to the second electrode 30, thereby replacing the original pressing process and improving the convenience of welding between the second electrode 30 and the first conductive part 23 .
[0119] Please refer to FIG. 3 , at least part of the first member 40 can be in contact with the second wall 112 . At this time, the first member 40 can protect the edge of the connection area between the first conductive part 23 and the electrode, so as to ensure the reliability of the connection. In some embodiments, at least a portion of the first member 40 can be bonded to the second wall 112 . Through the bonding effect between the first member 40 and the second wall 112, the first conductive part 23 can be closely attached to the second electrode 30, thereby further suppressing the shaking of the first conductive part when receiving an external impact, ensuring The reliability of the connection is improved, and the original pressing process can be replaced in the battery preparation process, so as to improve the convenience of the connection between the second electrode 30 and the first conductive part 23 . In some embodiments, the first member 40 is bonded to the second wall 112 on opposite sides of the first conductive portion 23 , which can further ensure a close-fitting effect and improve welding reliability. In some embodiments, the surface of the first member 40 has an adhesive material, for example, the first member ...
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Abstract

The invention provides a battery, which comprises an electrode assembly, a first electrode, a second electrode and a first material, and is characterized in that the electrode assembly comprises a first conductive part with a first surface and a second surface; the first electrode comprises a first concave part with a first opening, the first concave part comprises a first wall and a second wall, and the electrode assembly is accommodated in the first concave part; the second electrode is arranged in the first opening; the first surface comprises a first area connected with the first electrode or the second electrode; the first material contains an insulating material and comprises a first end face, and the first end face is connected with the second face. The invention further relates to electronic equipment. By arranging the first part material, when the battery is subjected to external impact, the impact of other parts in the electrode assembly on the first conductive part can be buffered, and the connection reliability between the first conductive part and the electrode is improved, so that the battery and the electronic equipment with longer service life are provided.

Application Domain

Secondary cells manufactureCell component details

Technology Topic

PhysicsElectrically conductive +5

Image

  • Battery and electronic equipment
  • Battery and electronic equipment
  • Battery and electronic equipment

Examples

  • Experimental program(1)

Example Embodiment

[0085] The technical solutions in the embodiments of the present application will be described clearly and in detail below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used in the specification of the present application are for the purpose of describing specific embodiments only, and are not intended to limit the present application.
[0086] Hereinafter, embodiments of the present application will be described in detail. This application may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and detailed to those skilled in the art.
[0087] Additionally, in the drawings, the size or thickness of various components, layers may be exaggerated for brevity and clarity. Throughout the text, the same numerical values ​​refer to the same elements. As used herein, the terms "and/or", "and/or" include any and all combinations of one or more of the associated listed items. Additionally, it will be understood that when element A is referred to as "connecting" element B, element A can be directly connected to element B, or intervening element C may be present and element A and element B may be indirectly connected to each other.
[0088] Further, the use of "may" when describing embodiments of the present application refers to "one or more embodiments of the present application."
[0089] The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the application. As used herein, the singular is intended to include the plural as well, unless the context clearly dictates otherwise. It should be further understood that the term "comprising", when used in this specification, refers to the presence of recited features, values, steps, operations, elements and/or components, but does not preclude the presence or addition of one or more other features, values , steps, operations, elements, components and/or combinations thereof.
[0090] Spatially relative terms, such as "on" and the like, may be used herein for convenience of description to describe the relationship of one element or feature to another element(s) or feature(s) as illustrated in the figures. It will be understood that, in addition to the orientation depicted in the figures, spatially relative terms are intended to encompass different orientations of the device or apparatus in use or operation. For example, if the device in the figures is turned over, elements described as "above" or "over" other elements or features would then be oriented "below" or "beneath" the other elements or features. Thus, the exemplary term "upper" can include both an orientation of above and below. It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections may not be shall be limited by these terms. These terms are used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of example embodiments.
[0091] Embodiments of the present application provide a battery, including an electrode assembly, a first electrode, a second electrode, and a first member, the electrode assembly including a first conductive portion having a first surface and a second surface; the first electrode comprising a first concave portion with a first opening, the first concave portion includes a first wall and a second wall, and the electrode assembly is accommodated in the first concave portion; the second electrode is arranged in the first opening; The first surface includes a first area that is in contact with the first electrode or the second electrode, the first member contains an insulating material, and the first member includes an opposite first end surface, the first One end face is in contact with the second face.
[0092] By adopting the above-mentioned battery, the first conductive part has the first surface that is in contact with the electrode, and at the same time, the first member is provided on the second surface of the first conductive part, so that when the battery is subjected to external impact, other components in the electrode assembly can be buffered Part of the impact on the first conductive part improves the connection reliability between the first conductive part and the electrode. In addition, in order to ensure the reliability of the connection in the process of preparing the battery, it is required that the tabs or adapters of the bare cell after being put into the case are tightly fitted with the case or the pole. , the pressing knife is inserted between the bare cell and the tab or adapter, and presses the tab or adapter during welding, so that the tab or adapter is in close contact with the shell or the pole. However, it is difficult to debug and control the precision and stroke of the pressing knife into the shell, and during the welding process, because the pressing knife needs to press the tab or the adapter, it is easy to cause the pressing knife to be welded together with the tab or the adapter. As a result, the flatness of the surface of the pressing knife is reduced, and it is difficult to ensure the close fit between the tab or the adapter piece and the housing or the pole in the subsequent welding process. The first part is located between the first conductive part and the pressing knife, so that it is convenient for the pressing knife to press the first conductive part and the electrode tightly, so as to ensure the reliability of the welding between the first conductive part and the electrode. In addition, due to the isolation of the first part It can avoid the damage to the pressing knife during the welding process, thereby simplifying the production process and reducing the production cost.
[0093] Embodiments of the present application further provide an electronic device, which includes the above-mentioned battery. By adopting the battery, the electronic equipment improves its own reliability, and the cost of the electronic equipment is also reduced as a whole due to the reduction of the cost of the battery.
[0094] Some embodiments will be described below with reference to the accompanying drawings. The embodiments described below and features in the embodiments may be combined with each other without conflict.
[0095] see figure 1 , figure 2 and image 3 , in order to better describe the structure of the battery 100, the description will be combined with the X, Y, and Z coordinate axes, wherein the X, Y, and Z coordinate axes are perpendicular to each other, and the direction perpendicular to the surface of the first region 2311 is X-axis direction. The battery 100 provided in the first embodiment of the present application includes a case 10 (first electrode), an electrode assembly 20, a second electrode 30 and a first member 40, and the electrode assembly 20 is accommodated in the case (the first electrode). In an electrode) 10, the electrode assembly 20 includes a first conductive portion 23 having a first surface 231 and a second surface 232, the second electrode 30 is provided in the casing 10, and the first member 40 is located in On the second surface 232 of the first conductive part 23, the first member 40 can protect the first conductive part 23, and when the battery is subjected to external impact, the impact of other parts of the electrode assembly on the first conductive part 23 can be buffered, The connection reliability between the first conductive portion 23 and the electrode is improved. In addition, during the preparation of the battery, the first region 2311 in the first surface 231 can be closely attached to the case (first electrode) 10 or the second electrode 30, so that the first region 2311 and the shell can be easily Welding is performed between the body (first electrode) 10 or the second electrode 30 .
[0096] see figure 1 , figure 2 and image 3 , the case (first electrode) 10 includes a bottom case 11 and a first cover 12 , and the first cover 12 is fixed on the bottom case 11 to protect the electrode assembly 20 . The second conductive portion 24 is connected to the bottom case 11 to realize electrical communication between the bottom case 11 and the electrode assembly 20 .
[0097] The bottom case 11 includes a first wall 111 and a second wall 112. The second wall 112 is arranged on the peripheral side of the first wall 111 and is perpendicular to the first wall 111. The deviation between the vertical arrangement of the second wall 112 and the first wall 111 can be within ±5°. The casing 10 is further provided with a first opening 113 , the first opening 113 is opened on the second wall 112 , and the second electrode 30 is provided at the first opening 113 . The first wall 111 and the second wall 112 together form a first concave portion 114 , and the electrode assembly 20 is accommodated in the first concave portion 114 . The first cover 12 is fixed to an end of the second wall 112 away from the first wall 111 and covers the first recess 114 , so that the electrode assembly 20 is accommodated in the casing 10 . The material of the bottom case 11 and the first cover 12 may include at least one of steel, copper, aluminum, nickel, and plastic; the material of the second electrode 30 may include at least one of copper, nickel, and aluminum. A sort of.
[0098] see figure 1 and figure 2 , the second wall 112 includes a curved second area 1121 and a flat third area 1122, and the second area 1121 and the third area 1122 are in contact. Further, the first opening 113 is provided in the third area 1122 , so that the casing 10 can better fix the second electrode 30 and lift the casing 10 and the second electrode 30 Of course, it is also feasible to provide the first opening 113 in a curved region such as the second region 1121 and then provide the second electrode 30 in the first opening 113 for the assembly efficiency. The second wall 112 includes a curved second region 1121 , in order to be further compatible with the electrode assembly 20 , and the curved second region 1121 is provided to increase the accommodation space of the housing 10 , The electrode assembly 20 with a larger volume can be accommodated, and the overall energy density of the battery 100 can be improved.
[0099] see figure 1 and image 3 , the first cover 12 includes a third wall 121 , and the first cover 12 is fixed on the second wall 112 to cover the first recess 114 . In one embodiment, the third wall 121 is provided with a second opening 1211 , and the second opening 1211 is located closer to the first opening 113 than the geometric center of the third wall 121 . position, the electrolyte solution can be injected into the bottom case 11 through the second opening 1211 . In order to cover the second opening 1211 , the first cover 12 further includes a second cover 122 . The second cover 122 is located at the position of the second opening 1211 and faces the housing. 10 extends inside to cover the second opening 1211 , preventing liquid, such as water, from flowing into the housing 10 from the second opening 1211 , and preventing the electrolyte from flowing out of the second opening 1211 . Setting the second opening 1211 close to the first opening 113 can improve the liquid injection efficiency.
[0100] In one embodiment, the first wall 111 , the second wall 112 and the first opening 113 are integrally formed. The first cover 12 is provided on the casing 10 , and the second cover 122 is provided on the third wall 121 .
[0101] see image 3 , the electrode assembly 20 includes a first pole piece 21 , a second pole piece 22 and an isolation membrane 25 , and the isolation membrane 25 is arranged between the first pole piece 21 and the second pole piece 22 .
[0102] The first pole piece 21 , the separator 25 and the second pole piece 22 are stacked to form a laminated electrode assembly 20 . The method of forming the electrode assembly 20 is relatively common in the field of manufacturing the battery 100 , and details are not described herein again.
[0103]The electrode assembly 20 further includes a first conductive part 23 having a first surface 231 and a second surface 232 , and the first surface 231 and the second surface 232 are opposite surfaces of the first conductive part 23 . In this embodiment, the first conductive portion 23 is connected to the first pole piece 21 . In some embodiments, the first conductive portion 23 may also be a part of the first pole piece 21 . The electrode assembly 20 is connected to the second electrode 30 through the first conductive portion 23 , so as to realize electrical communication between the electrode assembly 20 and the second electrode 30 . The first conductive portion 23 and the second electrode 30 may be connected by welding and/or a conductive adhesive material.
[0104] In this embodiment, after the electrode assembly 20 is installed in the casing 10 , the first surface 231 of the first conductive portion 23 is closer to the second electrode 30 than the second surface 232 , And the first surface 231 includes a first area 2311 that is in contact with the second electrode 30 , and the first area 2311 and the second electrode 30 can be welded and/or have conductive bonding. Materials are connected to achieve electrical communication between the electrode assembly 20 and the second electrode 30 .
[0105] In some embodiments, the first conductive part 23 includes a plurality of first metal parts 233 and a first transition part 234 , the first metal parts 233 are connected to the first pole piece 21 , in some embodiments , the first metal part 233 is a part extending from the first pole piece 21 , and a plurality of the first metal parts 233 are stacked to form a whole and are connected by welding. The part 234 is welded with a plurality of the first metal parts 233 forming a whole, and the first surface 231 is the surface corresponding to the first transfer part 234 and the second electrode 30 .
[0106] In one embodiment, the first pole piece 21 is a positive pole piece, and the positive pole piece includes a positive electrode current collector and a positive electrode active material layer disposed on the positive electrode current collector. The positive electrode active material layer may be located on one side or both sides of the positive electrode current collector. In some embodiments, the positive electrode current collector may be aluminum foil, and of course, other positive electrode current collectors commonly used in the art may also be used. In some embodiments, the positive active material may include at least one of lithium cobalt oxide, lithium manganate, lithium iron phosphate, lithium iron manganese phosphate, lithium nickel cobalt manganate, lithium nickel cobalt aluminate, or lithium nickel manganate, The above-mentioned positive electrode active material may be subjected to doping and/or coating treatment. The first metal part 233 is a positive electrode tab. The connection content between the positive electrode tab and the positive electrode tab is relatively common in the technical field of battery 100 manufacturing, and will not be repeated here.
[0107] The connection between the electrode assembly 20 and the second electrode 30 is further facilitated by arranging the first adapter portion 234 . It can be understood that, in other embodiments, the first transition portion 234 can also be cancelled, and the first metal portion 233 can be extended, so that the first metal portion 233 is directly connected to the second electrode 30 connections.
[0108] see image 3 , the electrode assembly 20 further includes a second conductive portion 24 having a third surface 241 and a fourth surface 242 , and the third surface 241 and the fourth surface 242 are opposite surfaces of the second conductive portion 24 . In this embodiment, the second conductive portion 24 is connected to the second pole piece 22 . In some embodiments, the second conductive portion 24 may also be a part of the second pole piece 22 . The electrode assembly 20 is connected to the casing 10 through the second conductive portion 24 , so as to realize electrical communication between the electrode assembly 20 and the casing 10 . The second conductive portion 24 and the housing 10 may be connected by welding and/or an adhesive material with electrical conductivity.
[0109] In this embodiment, after the electrode assembly 20 is installed in the casing 10 , the third surface 241 of the second conductive portion 24 is closer to the casing 10 than the fourth surface 242 , and The third surface 241 includes a fourth area 2411 connected to the casing 10 , and the fourth area 2411 and the casing 10 can be connected by welding and/or a conductive adhesive material , so as to achieve electrical communication between the electrode assembly 20 and the casing 10 .
[0110] In some embodiments, the second conductive part 24 includes a plurality of second metal parts 243 and a second transition part 244 , the second metal parts 243 are connected to the second pole piece 22 , in some embodiments , the second metal part 243 is a part extending from the second pole piece 22 , a plurality of the second metal parts 243 are stacked to form a whole and are connected by welding, the second transfer The part 244 is welded with a plurality of the second metal parts 243 forming a whole, and the third surface 241 is the surface of the second adapter part 244 corresponding to the casing 10 .
[0111] In one embodiment, the second pole piece 22 is a negative pole piece, and the negative pole piece may include a negative electrode current collector and a negative electrode active material layer disposed on the negative electrode current collector. The anode active material layer may be provided on one side or both sides of the anode current collector. In some embodiments, the negative electrode current collector may use at least one of copper foil, nickel foil or carbon-based current collector. In some embodiments, the anode active material layer may include an anode active material. In some embodiments, the negative active material includes at least one of a carbon material or a silicon-based material. In some embodiments, the carbon material includes at least one of graphite, hard carbon, and soft carbon; and the silicon-based material includes at least one of silicon, silicon oxide, silicon carbon, or silicon alloy. The second metal part 243 is a negative electrode tab. The connection content between the negative electrode tab and the negative electrode tab is relatively common in the field of battery 100 manufacturing technology, and will not be repeated here.
[0112] The connection between the electrode assembly 20 and the casing 10 is further facilitated by arranging the second adapter portion 244 . It can be understood that, in other embodiments, the second adapter portion 244 can also be eliminated, and the second metal portion 243 can be extended, so that the second metal portion 243 is directly connected to the housing 10 . connect.
[0113] see image 3 , the second electrode 30 is disposed at the first opening 113 , and the second electrode 30 is fixed on the outer wall forming the first opening 113 . An insulating spacer 70 is provided between the second electrode 30 and the second wall 112 to isolate the second electrode 30 and the second wall 112 to avoid electricity between the two. The battery 100 is short-circuited due to the connection.
[0114] The second electrode 30 is a pole, and the first conductive portion 23 and the pole are welded to achieve electrical conduction between the electrode assembly 20 and the pole. It can be understood that, in other embodiments, the second electrode 30 is not limited to this, and can be replaced with other structures with equivalent functions or functions.
[0115] see image 3 , when the electrode assembly 20 is set in the casing 10, the first member 40 is set on the second surface 232 of the first conductive portion 23, and the first end surface 41 of the first end surface 41 is connected to the second surface 232 connected. In one embodiment, the first member 40 has a sheet-like structure, and the first member 40 contains an insulating material to isolate the second pole piece 22 from the first conductive portion 23 and reduce the electrical connection between the two. The battery 100 is short-circuited. The first member 40 can also protect the first conductive portion 23, and when the battery is impacted by the outside, it can buffer the impact of other parts of the electrode assembly on the first conductive portion 23, and improve the connection between the first conductive portion 23 and the electrode. reliability. The insulating material may include a polymer. The polymer has excellent insulating properties and low hardness, and can deform when subjected to impact to play a buffering role. In some embodiments, the polymer includes at least one of polyethylene, polypropylene, polyurethane, styrene-butadiene rubber, and acrylate-based elastomers. In some embodiments, the elasticity of the first member 40 is higher than that of the case 10 , the second electrode 30 or the first conductive portion 23 . In some embodiments, the elastic coefficient of the first member 40 ranges from 0.2 to 2 N/mm.
[0116] see Figure 4 , the first member 40 further includes a second end surface 42 opposite to the first end surface 41 , the second end surface 42 is connected with the main body of the electrode assembly 20 , wherein the main body of the electrode assembly 20 The part is an integral structure including the first pole piece 21, the second pole piece 22, the isolation film 25 and the adjacent part of the pole lug and the pole piece. The main part of the assembly 20 is connected, which can restrain the shaking of the electrode assembly 20 in the casing 10, reduce the pulling on the first conductive part 23, and reduce the risk of the connection between the first conductive part 23 and the electrode falling off, thereby increasing the battery service life. In one embodiment, the first member 40 includes a square block structure, a rectangular block structure, and a cylindrical structure, and the first member 40 contains an insulating material. In some embodiments, the first member 40 is insulating foam.
[0117] It can be understood that, in other embodiments, the shape of the first member 40 is not limited to this. For example, other cylindrical shapes such as elliptical cylinders can also be substituted. The insulating material for making the first member 40 is not limited to the above-mentioned insulating foam, and it can also be replaced with other structures with equivalent functions or functions.
[0118] In some embodiments, the first member 40 is disposed between the first conductive portion 23 and the main body of the electrode assembly 20 using an interference fit, so that the first conductive portion 23 passes through the first member 40 is pressed closely to the second electrode 30 , so that the original pressing process can be replaced, and the convenience of welding between the second electrode 30 and the first conductive portion 23 is improved.
[0119] see image 3 , at least part of the first member 40 can be in contact with the second wall 112 . At this time, the first member 40 can protect the edge of the connection area between the first conductive portion 23 and the electrode to ensure the reliability of the connection. In some embodiments, at least a portion of the first member 40 may be bonded to the second wall 112 . Through the adhesion between the first member 40 and the second wall 112 , the first conductive portion 23 can be closely attached to the second electrode 30 , thereby further suppressing the shaking of the first conductive portion when subjected to external impact, ensuring that the The reliability of the connection is improved, and the original pressing process can be replaced during the battery preparation process, which improves the convenience of the connection between the second electrode 30 and the first conductive portion 23 . In some embodiments, the first member 40 is bonded to the second wall 112 on opposite sides of the first conductive portion 23 , which can further ensure the close contact effect and improve the reliability of welding. In some embodiments, the surface of the first part 40 has an adhesive material, for example, the first part 40 can be an insulating tape.
[0120] see Figure 4 and Figure 5 , Figure 5 It is a perspective schematic diagram of the battery 100 , wherein the dotted line represents the structure disposed inside the casing 10 , specifically the electrode assembly 20 and the first member 40 . Viewed from a first direction perpendicular to the first region 2311 , the first region 2311 and the first member 40 have overlapping portions. Wherein, the first direction is along the X-axis direction.
[0121] like Figure 5 As shown, the content shown by the dotted line is the electrode assembly 20 and the first member 40. It can be observed that the first member 40 and the first region 2311 have overlapping parts, that is, the first conductive portion 23 and the electrode. The surface of the connection area has the first member 40, which can buffer the impact of other parts of the electrode assembly 20 directly on the connection area, and improve the connection reliability between the first conductive part 23 and the electrode; in addition, in the process of preparing the battery, it can make When the first member 40 presses the first conductive portion 23 , the first area 2311 on the first surface 231 is better in close contact with the second electrode 30 , which is convenient for the first area Welding is performed between the 2311 and the second electrode 30 to improve the stability of the welding between the first conductive portion 23 and the second electrode 30 .
[0122] see Figure 5, in one embodiment, viewed along the X-axis direction, the first member 40 has a portion that does not overlap with the first opening 113 . That is, there is a portion of the first member 40 that exceeds the first opening 113 , so that the first member 40 has a portion larger than the first opening 113 in other directions. 40 can better protect the connection structure between the first conductive part 23 and the second electrode 30 and/or between the second electrode 30 and the casing 10 at the first opening 113, buffer the impact there, and improve the connection stability; during the battery preparation process, the first member 40 can better press the first conductive part 23, so that the larger area of ​​the first conductive part 23 is attached to the first conductive part 23 On the second electrode 30 at the opening 113, it is fully ensured that the first conductive portion 23 has a sufficient area to be connected with the second electrode 30, and the stability of the connection between the two is ensured.
[0123] see Figure 4 , in one embodiment, the first member 40 is disposed farther from the first wall 111 than the center of the second wall 112 in the second direction perpendicular to the first wall 111 Location. Wherein, the second direction is along the Z-axis direction. In the direction along the Z-axis, with the center of the second wall 112 as a reference, the first member 40 is disposed above the center of the second wall 112 so that the first member 40 is away from the first wall 111 . Wherein, the center portion of the second wall 112 is at the midpoint position.
[0124] The first member 40 is arranged at a position farther from the first wall 111 , so that the first member 40 can better press the first transition portion 234 in the first conductive portion 23 , The interference between the first member 40 and the stacked first metal portions 233 is avoided, thereby affecting the connection between the first metal portion 233 and the first transition portion 234 .
[0125] see Image 6 , in one embodiment, along Image 6 In the middle Y-axis direction, the length of the first member 40 may be smaller than the length of the first conductive portion 23 .
[0126] see image 3 , the battery 100 further includes a second member 50 , when the electrode assembly 20 is arranged in the casing 10 , the second member 50 is arranged on the fourth surface 242 of the second conductive portion 24 , The third end surface 51 is in contact with the fourth surface 242 . In one embodiment, the second member 50 has a substantially sheet-like structure, and the second member 50 contains an insulating material to isolate the first pole piece 21 and the second conductive portion 24 and reduce the electrical connection between the two. The battery 100 is short-circuited. The second member 50 can also protect the second conductive portion 24. When the battery is impacted by the outside, it can buffer the impact of other parts of the electrode assembly 20 on the second conductive portion 24 and improve the contact between the second conductive portion 24 and the electrode. Connection reliability. The insulating material may include a polymer. The polymer has excellent insulating properties and low hardness, and can deform when subjected to impact to play a buffering role. In some embodiments, the polymer includes at least one of polyethylene, polypropylene, polyurethane, styrene-butadiene rubber, and acrylate-based elastomers. In some embodiments, the elasticity of the second member 50 is higher than that of the housing 10 or the second conductive portion 24 . In some embodiments, the elastic coefficient of the second member 50 ranges from 0.2 to 2 N/mm.
[0127] see Figure 4 , the second member 50 also includes a fourth end surface 52 opposite to the third end surface 51, the fourth end surface 52 is in contact with the main body of the electrode assembly 20, and when impacted by an external force, passes through the second end surface 52. The fourth end face 52 of the member 50 is in contact with the main body of the electrode assembly 20, which can restrain the shaking of the electrode assembly 20 in the casing 10, reduce the pulling on the second conductive part 24, and reduce the separation of the second conductive part 24 from the electrode. risk, thereby increasing battery life. In one embodiment, the second member 50 has a substantially square block structure, and the second member 50 contains an insulating material. In some embodiments, the second member 50 is insulating foam.
[0128] It can be understood that, in other embodiments, the shape of the second member 50 is not limited to this. For example, other shapes such as a cylindrical shape can also be substituted. The insulating material for making the second member 50 is not limited to the above-mentioned insulating foam, and it can also be replaced with other structures with equivalent functions or functions.
[0129] In some embodiments, the second member 50 is disposed between the second conductive portion 24 and the main body of the electrode assembly 20 using an interference fit, so that the second conductive portion 24 passes through the second member 50% of the pressure is pressed against the second wall 112 of the battery 100, so that the original pressing process can be replaced, and the convenience of welding between the second wall 112 and the second conductive part 24 can be improved. .
[0130] see image 3 , at least part of the second member 50 may be in contact with the second wall 112 . At this time, the second member 50 can sufficiently protect the edge of the second conductive portion 24 and the electrode connection region, so as to ensure the reliability of the connection. In some embodiments, at least a portion of the second member 50 may be bonded to the second wall 112 . Through the adhesion between the second member 50 and the second wall 112 , the second conductive portion 24 can be closely adhered to the second wall 112 , thereby further suppressing the shaking of the second conductive portion 24 when subjected to an external impact. The reliability of the connection is improved, and the original pressing process can be replaced, and the convenience of welding between the second wall 112 and the second conductive portion 24 is improved. In some embodiments, the second member 50 is bonded to the second wall 112 on opposite sides of the second conductive portion 24 , which can further ensure the close contact effect and improve the reliability of welding. In some embodiments, the surface of the second member 50 has an adhesive material, for example, the second member 50 may be an insulating tape.
[0131] In one embodiment, the battery 100 includes a first electrode including a second wall 112 of the battery 100, the second wall 112 being made of a conductive material to enable it to function as the The first electrode of the battery 100 . The second conductive portion 24 is pressed against the first electrode by the extrusion of the second member 50 to improve the reliability and convenience of welding between the first electrode and the second conductive portion 24 sex.
[0132] see Figure 4 and Figure 7 , Figure 7 It is a perspective schematic diagram of the battery 100 from another perspective, wherein the dotted line represents the structure disposed inside the casing 10 . In one embodiment, at least a portion of the second member 50 is in contact with the second wall 112 . When the extending distance of the second member 50 along the Y-axis is greater than the extending distance of the second conductive portion 24 along the Y-axis, the portion of the second member 50 beyond the second conductive portion 24 and the second conductive portion 24 The walls 112 are in contact with each other, so that during the battery production process, when the second member 50 presses the second conductive portion 24 , the second conductive portion 24 along the Y-axis direction can be in close contact with the first conductive portion 24 . On the electrode, the connection between the second conductive portion 24 and the first electrode is facilitated, and the stability of the connection is improved.
[0133] In one embodiment, when viewed along a third direction perpendicular to the fourth region 2411 , the fourth region 2411 and the second member 50 have overlapping portions. Wherein, the third direction is the opposite direction of the X axis.
[0134] like Figure 7 As shown, the content shown by the dotted line is the electrode assembly 20 and the second member 50. It can be observed that the second member 50 and the fourth region 2411 have overlapping parts, that is, the second conductive portion 24 and the electrode. The surface of the connection area has the second member 50, which can buffer the impact of other parts in the electrode assembly directly on the connection area, and improve the connection reliability between the second conductive part 24 and the electrode; in the process of preparing the battery, the first part can be When the second member 50 presses the second conductive portion 24, the fourth region 2411 on the third surface 241 is better in close contact with the first electrode, so that the fourth region 2411 and the The connection between the first electrodes improves the stability of the connection between the second conductive portion 24 and the first electrode.
[0135] In some embodiments, the second wall 112 forming the first electrode is a flat area, so that the second member 50 can better abut the second conductive portion 24 on the flat first electrode, The stability of the connection between the second conductive portion 24 and the first electrode is improved.
[0136] see Figure 4 , in one embodiment, the second member 50 is disposed farther from the first wall 111 than the center of the second wall 112 in the second direction perpendicular to the first wall 111 Location. Wherein, the second direction is along the Z-axis direction. In the direction along the Z axis, the second member 50 is disposed above the center portion of the second wall 112 with the center portion of the second wall 112 as a reference, so that the second member 50 is far away from the center portion. the first wall 111 . Wherein, the center portion of the second wall 112 is at the midpoint position.
[0137] The second member 50 is arranged at a position farther from the first wall 111 , so that the second member 50 can better press the second transition portion 244 in the second conductive portion 24 , The interference between the second member 50 and the stacked second metal portions 243 is avoided, thereby affecting the connection between the second metal portion 243 and the second transition portion 244 .
[0138] In this embodiment, the first member 40 and the second member 50 have the same structure and the same function. The first member 40 is pressed against the first conductive portion 23 , and the second member 50 is pressed against the second conductive portion 24 , so that the first conductive portion 23 and the second electrode 30 are closely spaced For bonding, the second conductive portion 24 is closely bonded to the first electrode, thereby improving the reliability of the connection.
[0139] see Figure 8 , in one embodiment, along Figure 8 In the middle Y-axis direction, the length of the second member 50 may be smaller than the length of the second conductive portion 24 .
[0140] see Figure 9 and Figure 10 , Figure 9 A schematic diagram of the three-dimensional structure of the battery 100 after removing the first cover 12, Figure 9 for Figure 7 The illustrated top view of the battery 100 with the first cover 12 removed. It can be seen that the first member 40 and the second member 50 are located at opposite ends of the battery 100 .
[0141] In some embodiments, when the first member 40 and the second member 50 are both insulating foams, the insulating foams have a porous structure, which can provide sufficient buffering effect and reduce the first conductive portion or the second conductive portion. The impact on the conductive part improves the reliability of the connection and increases the life of the battery. The material of the insulating foam can be at least one of polypropylene (PP) and polyurethane (PU). It can be understood that, in other embodiments, the material of the insulating foam is not limited to this.
[0142] When arranging the first member 40 and the second member 50, the electrode assembly 20 can be set in the casing 10 first, and then the first member 40 and the second member 50 can be placed. After the first member 40 and the second member 50 are assembled with the electrode assembly 20 , they can be put into the casing 10 together.
[0143] see again Figure 4, in another embodiment, the arrangement of the first conductive portion 23 and the first member 40 is opposite to that of the above-mentioned first embodiment. Specifically, the battery 100 includes a casing 10 , an electrode assembly 20 , a second electrode 30 and a first member 40 , and the arrangement and connection relationships between the structures are substantially the same as those of the battery 100 in the first embodiment. It is as follows: the second conductive portion 24 in the first embodiment is the first conductive portion 23 in this embodiment, and the second member 50 in the first embodiment is the first member 40 in this embodiment.
[0144] Specifically, the first member 40 is disposed at a position farther from the first wall 111 than the center of the second wall 112 in the second direction perpendicular to the first wall 111 . Further, at least a part of the first member 40 is in contact with the second wall 112 . Wherein, the second wall 112 forms the first electrode of the battery 100 . That is, the first member 40 is disposed on the first conductive portion 23, and the first conductive portion 23 is connected to the second wall 112 forming the first electrode, so that the electrode assembly 20 and the Electrical communication between housings 10 .
[0145] The first conductive portion 23 in this embodiment is the second conductive portion 24 in the above-mentioned first embodiment, and the first member 40 is the second member 50 in the above-mentioned first embodiment.
[0146] The battery 100 further includes a second electrode 30 disposed in the first opening 113 . The second conductive portion 24 is pressed against the second electrode 30 by the second member 50 . In this embodiment, the second conductive portion 24 is the first conductive portion 23 in the above-mentioned first embodiment, and the second member 50 is the first member 40 in the above-mentioned first embodiment.
[0147] see Figure 11 and Figure 12 , Figure 11 It is a schematic three-dimensional structure diagram of the battery 100 in the second embodiment of the present application, Figure 12 for Figure 11 A schematic cross-sectional view of the battery 100 along the B-B direction is shown. The structure of the battery 100 in the second embodiment is substantially the same as the structure of the battery 100 in the first embodiment, the difference is that, in the second embodiment, the second opening 1211 on the first cover 12 is provided in the third at the approximate center of the wall 121 . Setting the second opening 1211 at this position can improve the influence of the first conductive portion 23 and the first pole piece during the flow of the electrolyte when the electrolyte is injected into the casing 10 . The connection between the first conductive parts 23 and the first pole piece 21 ensures the stability of the connection.
[0148] Moreover, in the second embodiment, the first conductive portion 23 cancels the first transfer portion 234 , the second conductive portion 24 cancels the second transfer portion 244 , and the first member 40 is directly connected to the Pressed on the first metal part 233, the first metal part 233 is welded with the second electrode 30, the second member 50 is pressed on the second metal part 243, and the first metal part 50 is pressed on the second metal part 243. The two metal parts 243 are welded to the first electrode.
[0149] In some embodiments, along the Z-axis direction, the distance that the first member 40 extends is substantially the same as the distance that the first conductive portion 23 between the first member 40 and the second electrode 30 extends, The second member 50 extends approximately the same distance as the second conductive portion 24 between the second member 50 and the first electrode, wherein "substantially the same" should be understood to include the same, and There is a slight distance difference. In this way, the first member 40 presses the first conductive portion 23 on the second electrode 30 , and the second member 50 presses the second conductive portion 24 on the first electrode. At the time of welding, the ends of the first conductive part 23 and the second conductive part 24 can be welded to improve the alignment of the extended parts of the first conductive part 23 and the second conductive part 24 The influence of the electrode assembly 20 after welding, for example, the extended part will drive the first conductive part 23 and the second conductive part 24 to move, thereby causing unstable welding.
[0150] see Figure 13 , Figure 13 It is a schematic cross-sectional view of the battery 100 in the third embodiment of the present application. The structure of the battery 100 in the third embodiment is substantially the same as the structure of the battery 100 in the first embodiment, the difference is that in the third embodiment, the first pole piece 21 and the second pole piece 22 included in the electrode assembly 20 It is formed by winding.
[0151] see Figure 14 and Figure 15 , Figure 14 It is a schematic three-dimensional structure diagram of the battery 100 in the fourth embodiment of the present application, Figure 15 for Figure 14 A schematic cross-sectional view of the battery 100 along a C-C square is shown. The structure of the battery 100 in the fourth embodiment is substantially the same as the structure of the battery 100 in the first embodiment, the difference is that the electrode assembly 20 is a wound structure, and the second electrode 30 is provided on the first cover The body 12 is close to the surface of the electrode assembly 20, the first conductive part 23 is connected to the second electrode 30, the first conductive part 23 is not squeezed by the first member 40, but is The second wall 112 fixes the electrode assembly 20 . In addition, the second member 50 is arranged to press the second conductive portion 24 so that the second conductive portion 24 is in close contact with the first electrode. .
[0152] A first layer 60 is provided between the first cover 12 and the bottom case 11, and the first layer 60 is used to seal the first cover 12 and the bottom case 11 to avoid liquid, For example, water flows into the bottom case 11 .
[0153] In some embodiments, the first layer 60 is a sealant. It can be understood that, in other embodiments, the first layer 60 is not limited to this, and can be replaced with other structures with equivalent functions or functions.
[0154] see Figure 16 , Figure 16 for Figure 14 A schematic perspective view of the battery 100 shown. Wherein, the content shown by the dotted line is the electrode assembly 20 and the second member 50 , the second member 50 and the second conductive part 24 are overlapped, and the second conductive part 24 has been closely attached to the The first electrode enables the second conductive portion 24 to be easily welded with the first electrode.
[0155] see Figure 17 , Figure 17 shown is Figure 14 The illustrated top view of the battery 100 with the first cover 12 removed. Similar to the first embodiment, in the fourth embodiment, the size of the second member 50 needs to be adapted to the second conductive portion 24 and the main body of the electrode assembly 20 to ensure that the electrode assembly 20 can be assembled smoothly into the housing 10 , and ensure that the second member 50 can press the second conductive portion 24 . In addition, it is necessary to reduce the interference of the second member 50 with the first cover body 12 during the assembly process.
[0156] see Figure 18 , Figure 18 It is a schematic three-dimensional structure diagram of the electronic device 200 in the fifth embodiment of the present application. The electronic device 200 includes a main body 80 and the battery 100 described in any of the above embodiments. The battery 100 is accommodated in the main body 80 and is used to provide electrical energy to the main body 80 . The electronic device 200 adopts the battery 100 in any of the above-mentioned embodiments, and thus has all the beneficial effects of the battery 100 , which will not be repeated here.
[0157] In some embodiments, the electronic device 200 may be a smart wearable device, such as a Bluetooth headset, or a small lighting device. It can be understood that the specific type of the electronic device 200 is not limited to this, and other structures may also be used.
[0158] When the electronic device 200 is a Bluetooth headset, the body 80 is a headset structure, and the battery 100 is used to provide power to the headset. When the electronic device 200 has other structures, the body 80 is replaced accordingly.
[0159] To sum up, in the battery 100 and the electronic device 200 provided in the embodiments of the present application, by disposing the first member 40 on the second surface 232 of the first conductive portion 23 , the electrode assembly can be buffered when the battery is subjected to external impact The impact of other parts in the 20 on the first conductive part 23 improves the connection reliability between the first conductive part 23 and the electrode; in addition, in the process of preparing the battery, the first part 40 is located between the first conductive part 23 and the pressing knife. between the first conductive parts 23 and the electrodes, thereby ensuring the reliability of welding between the first conductive parts 23 and the electrodes, and due to the isolation effect of the first member 40, the pressure knife during the welding process is avoided. damage. In addition, through the extrusion of the first member 40 and/or the adhesion between the first member 40 and the second wall 112 , the first conductive portion 23 is closely attached to the first electrode, thereby It can further suppress the shaking of the first conductive part 23 when it is subjected to external impact, improve the connection reliability between the first conductive part 23 and the electrode, and in the process of battery preparation, it can replace the original pressing process, improve the The convenience of welding between the electrode assembly 20 and the electrodes. At the same time, the stability of welding is guaranteed.
[0160] In addition, those of ordinary skill in the art should realize that the above embodiments are only used to illustrate the present application, rather than being used to limit the present application. Appropriate modifications and variations are within the scope of this disclosure.

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