CN114373886A - Battery and electronic equipment - Google Patents
Battery and electronic equipment Download PDFInfo
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- CN114373886A CN114373886A CN202111666330.0A CN202111666330A CN114373886A CN 114373886 A CN114373886 A CN 114373886A CN 202111666330 A CN202111666330 A CN 202111666330A CN 114373886 A CN114373886 A CN 114373886A
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/533—Electrode connections inside a battery casing characterised by the shape of the leads or tabs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/536—Electrode connections inside a battery casing characterised by the method of fixing the leads to the electrodes, e.g. by welding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The application relates to the technical field of batteries and discloses a battery and electronic equipment. The battery comprises a first pole piece, a first conductive piece and a second conductive piece. The first pole piece comprises a first current collector, and the first current collector comprises a first conductive material layer, an insulating material layer and a second conductive material layer which are arranged in a stacked mode. The first conductive part is connected with the first conductive material layer; the second conductive piece is connected to the second conductive material layer, a distance is reserved between the second conductive piece and the first conductive piece along the extension direction of the long edge of the first current collector, and the first conductive piece is electrically connected with the second conductive piece. Then, the first conductive material layer and the second conductive material layer realize electronic conduction; therefore, the first pole piece has larger overcurrent capacity. That is, the battery that this application embodiment provided can improve the present situation that the current battery pole piece that adopts compound current collector has a weak ability to flow.
Description
[ technical field ] A method for producing a semiconductor device
The embodiment of the application relates to the technical field of batteries, in particular to a battery and electronic equipment.
[ background of the invention ]
A battery is a device that converts external energy into electric energy and stores the electric energy in the battery so as to supply power to external devices (such as portable electronic devices) at a desired time. Currently, batteries are widely used in electronic devices such as mobile phones, tablets, and notebook computers.
The pole piece of the battery comprises a current collector and an active material layer arranged on the current collector. At present, the pole piece in some batteries in the market adopts a composite current collector. Specifically, the composite current collector comprises an insulating material layer positioned in the middle and conductive material layers arranged on two sides of the insulating material layer; the tab of the battery is arranged on a conductive material layer.
Because the insulating material layer is arranged between the two conductive material layers, electrons of the conductive material layer on the side deviating from the conductive piece are difficult to flow to the pole lug, and the actual overcurrent capacity of the pole piece is weak.
[ summary of the invention ]
The embodiment of the application aims to provide a battery and electronic equipment so as to improve the current situation that the current pole piece has weak overcurrent capacity.
The technical problem is solved by adopting the following technical scheme, and the scheme specifically comprises the following steps:
a battery includes a first pole piece, a second pole piece, and a separator. The first pole piece comprises a first current collector, and the first current collector comprises a first conductive material layer, an insulating material layer and a second conductive material layer which are arranged in a stacked mode. The battery also includes a first conductive element and a second conductive element. The first conductive piece is connected to the first conductive material layer; the second conductive piece is connected to the second conductive material layer and is arranged along the extending direction of the long edge of the first current collector, a distance is reserved between the second conductive piece and the first conductive piece, and the first conductive piece and the second conductive piece are electrically connected.
In the battery that this application embodiment provided: the first conductive member is connected to the first conductive material layer, the second conductive member is connected to the second conductive material layer, and the first conductive member and the second conductive member are electrically connected. Then, the first conductive material layer and the second conductive material layer are electrically connected. In this way, the tab is mounted on the first current collector either directly or indirectly by mounting the tab on the first conductive member and/or the second conductive member, or by extending the casing with the first conductive member and/or the second conductive member to serve as the tab; the first conductive material layer and the second conductive material layer in the first current collector can realize the circulation of electrons with the tab, so that the overcurrent capacity of the first pole piece is higher. That is, the battery that this application embodiment provided can improve the present situation that the current battery pole piece that adopts compound current collector has a weak ability to flow.
In some embodiments, the battery further comprises a housing, and the first pole piece, the second pole piece and the isolation film are accommodated in the housing.
In some embodiments, the first conductive member and the second conductive member are fixedly connected, and at least one of the first conductive member and the second conductive member extends out of the housing. Thus, the first conductive member and/or the second conductive member constitute conductive terminals for the battery to be electrically connected to an external electric device.
In some embodiments, the conductive device further comprises a first conductive sheet connected to the first conductive member and the second conductive member respectively. Therefore, the first conductive member and the second conductive member are electrically connected, that is, the first conductive material layer and the second conductive material layer are electrically connected.
In some embodiments, the battery further comprises a third electrically conductive member; the third conductive piece is connected to the first conductive piece, and at least part of the third conductive piece is exposed outside the shell. In this way, the third connecting member constitutes a conductive terminal for electrically connecting the battery to an external consumer.
In some embodiments, the first conductive sheet is located inside the housing. The first conducting plate is positioned in the shell, so that the first conducting plate can be protected by the shell; in addition, the third conductive member penetrates through the housing and is fixed by the housing, so that the third conductive member and the housing have a better relative fixing effect.
In some embodiments, the conductive strip is located on the exterior of the housing. Therefore, the first conducting plate does not occupy the inner space of the shell; in addition, the first conducting plate and the third conducting piece are movable relative to the shell, namely the whole occupied space of the battery can be reduced by bending the first conducting plate and/or the third conducting piece; therefore, the first conducting strip is arranged outside the shell, so that the overall energy density of the battery is improved.
In some embodiments, the first pole piece further comprises a first active material layer. The surface of the first conductive material layer is provided with a first film covering area provided with a first active material layer and a first blank area not provided with the first active material layer, and the first conductive piece is fixed in the first blank area. The surface of the second conductive material layer is provided with a second film coating area provided with a first active material layer and a second blank area not provided with the first active material layer, and the second conductive piece is fixed in the second blank area. The first current collector is provided with a first active material in the first film coating area and the second film coating area, so that a matrix for lithium ion intercalation or deintercalation can be provided; the first blank area/the second blank area of the first current collector can be used for connecting the first conductive element/the second conductive element.
In some embodiments, the first current collector has a first broad side and a second broad side which are oppositely arranged along the extending direction of the long side. The first blank area extends from the first wide edge to the second wide edge, and the second blank area extends from the first wide edge to the second wide edge; or, the first blank region extends from the first wide edge to the second wide edge, and the second blank region extends from the second wide edge to the first wide edge; or the first coating area is arranged between the first wide edge and the first blank area, and the second coating area is arranged between the second wide edge and the second blank area; or the first coating region is arranged between the first wide edge and the first blank region, and the second blank region extends from one of the first wide edge and the second wide edge to the other.
In some embodiments, the battery includes a plurality of first conductive members and a plurality of second conductive members;
the first conductive pieces are arranged at intervals along the extending direction of the long edge, the second conductive pieces are arranged at intervals along the extending direction of the long edge, and each first conductive piece is correspondingly and electrically connected with one second conductive piece. The arrangement of the first conductive pieces and the second conductive pieces is beneficial to reducing the integral internal resistance of the battery.
In some embodiments, the second electrode sheet includes a second current collector, and the second current collector includes a first conductive substance layer, an insulating substance layer, and a second conductive substance layer stacked in this order. The battery also includes a first conductive element and a second conductive element. The first conductive element is connected to the first conductive substance layer; the second conductive element is connected to the second conductive substance layer, a distance is reserved between the first conductive element and the second conductive element along the extension direction of the long edge, and the second conductive element is electrically connected with the first conductive element.
In the battery that this application embodiment provided: the first conductive element is connected to the first conductive substance layer, the second conductive element is connected to the second conductive substance layer, and the first conductive element and the second conductive element are electrically connected. Then, the first conductive material layer and the second conductive material layer are electrically connected. In this way, the tab is mounted on the second current collector either directly or indirectly by mounting the tab on the first conductive element and/or the second conductive element, or by extending the first conductive element and/or the second conductive element out of the casing to serve as the tab; the first conductive substance layer and the second conductive substance layer in the second current collector can realize the circulation of electrons with the lug, so that the overcurrent capacity of the second pole piece is higher. That is, the battery that this application embodiment provided can improve the present situation that the current battery pole piece that adopts compound current collector has a weak ability to flow.
The embodiment of the application also adopts the following technical scheme to solve the technical problem, and the scheme specifically comprises the following steps:
an electronic device comprises the battery. Due to the adoption of the battery, the electronic equipment can also improve the current situation that the current battery pole piece adopting the composite current collector has weak overcurrent capacity.
[ description of the drawings ]
One or more embodiments are illustrated in drawings corresponding to, and not limiting to, the embodiments, in which elements having the same reference number designation may be represented as similar elements, unless specifically noted, the drawings in the figures are not to scale.
Fig. 1 is a schematic diagram of a battery provided in an embodiment of the present application;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a schematic view of the connection of the first pole piece of FIG. 2 with the first and second conductive members in an unfolded state;
FIG. 4 is a top view of FIG. 3;
FIG. 5 is a top view of a first pole piece according to another embodiment of the present application;
FIG. 6 is a top view of a first pole piece provided in accordance with yet another embodiment of the present application;
FIG. 7 is a top view of a first pole piece according to yet another embodiment of the present application;
FIG. 8 is a schematic view of the connection of the second pole piece of FIG. 2 with the first and second conductive elements in an expanded state;
FIG. 9 is a top view of FIG. 8;
fig. 10 is a schematic diagram of an electronic device according to an embodiment of the present application.
In the figure:
1. a battery;
100. a housing; 101. an accommodating cavity;
200. an electrode assembly; 210. a first pole piece; 220. a second pole piece; 230. an isolation film; 211. a first current collector; 212. a first active material layer; 2111. a layer of insulating material; 2112. a first layer of conductive material; 2113. a second layer of conductive material; 21121. a first film-coating region; 21122. a first blank area; 21131. a second film-coating region; 21132. a second blank area; 2101. a long side; 2102. a wide side; 2102a, a first broadside; 2102b, a second broadside; 221. a second current collector; 222. a second active material layer; 2211. a layer of insulating material; 2212. a first conductive substance layer; 2213. a second conductive substance layer; 2201. a long side; 2202. a wide side; 2202a, a first wide side; 2202b, a second wide side; 22121. a first coating film region; 22122. a first margin area; 22131. a second coating film region; 22132. a second margin area;
300. a first conductive member; 310. a first conductive sheet; 320. a third conductive member;
400. a second conductive member;
500. a first conductive element; 510. a second conductive sheet; 520. a third conductive element;
600. a second conductive element;
2. an electronic device.
[ detailed description ] embodiments
In order to facilitate an understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is referred to as being "fixed to"/"mounted to" another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and the like as used herein are for descriptive purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.
In this specification, the term "mount" includes welding, screwing, clipping, adhering, etc. to fix or restrict a certain element or device to a specific position or place, the element or device may be fixed or movable in a limited range in the specific position or place, and the element or device may be dismounted or not dismounted after being fixed or restricted to the specific position or place, which is not limited in the embodiment of the present application.
Referring to fig. 1 to 4 together, fig. 1 shows a schematic diagram of a battery 1 according to an embodiment of the present application, fig. 2 shows the schematic diagram of fig. 1 taken along line a-a, fig. 3 shows a schematic diagram of a connection of a first pole piece 210, a first conductive member 300 and a second conductive member 400 in an unfolded state, and fig. 4 shows a top view of fig. 3; the battery 1 includes a case 100, an electrode assembly 200, a first conductive member 300, and a second conductive member 400. The housing 100 is a mounting base for the above-described components. Electrode assembly 200 includes a first pole piece 210, a second pole piece 220, and a separator 230. The first pole piece 210 includes a first current collector 211, where the first current collector 211 includes a first conductive material layer 2112, an insulating material layer 2111, and a second conductive material layer 2113, which are stacked; an insulating material layer 2111 is disposed between the first conductive material layer 2112 and the second conductive material layer 2113. First conductive member 300 is connected to first conductive material layer 2112, and second conductive member 400 is connected to second conductive material layer 2113. The second conductive device 400 is electrically connected to the first conductive device 300, and a distance is formed between the second conductive device 400 and the first conductive device 300 along the extending direction of the long side of the first current collector 211. Next, specific structures of the case 100, the electrode assembly 200, the first conductive member 300, and the second conductive member 400 will be described in detail in sequence.
Referring to the case 100, referring to fig. 1, the case 100 has a relatively flat box-shaped structure and is provided with a receiving cavity 101 for receiving the electrode assembly 200 and the electrolyte. In this embodiment, the battery 1 may be a pouch battery; accordingly, the housing 100 is made of an aluminum plastic film or other flexible sheet material; of course, in other embodiments of the present application, the battery 1 may also be a hard-shell battery, such as a steel-shell battery or an aluminum-shell battery. In addition, in other embodiments of the present application, the housing 100 may also have other shapes, such as a block shape, a column shape, etc., which are not limited herein.
Referring to the electrode assembly 200, referring to fig. 2, the electrode assembly 200 is received in the receiving cavity 101, and includes a first pole piece 210, a second pole piece 220, and an isolation film 230. The polarities of the first pole piece 210 and the second pole piece 220 are opposite, one of the two pole pieces is an anode piece, and the other pole piece is a cathode piece; the first pole piece 210 and the second pole piece 220 are spaced apart from each other, and a separation film 230 is disposed between the two for separation. In this embodiment, the electrode assembly 200 is a wound structure; specifically, the first pole piece 210, the second pole piece 220, and the separator 230 are stacked and then wound into a cylindrical structure having an oblong cross section so as to be accommodated in the accommodation cavity 101. It should be noted that the present application does not limit the specific form of the electrode assembly 200, and in other embodiments of the present application, the electrode assembly 200 may have other forms; for example, in some other embodiments of the present application, the electrode assembly 200 is a laminated structure including first and second pole pieces 210 and 220 alternately arranged in a stacking direction, with the above-described separator stacked between the adjacent first and second pole pieces 210 and 220.
Next, the first pole piece 210 in the electrode assembly 200 will be explained in detail.
Referring to fig. 3 and 4, in detail, with reference to fig. 1 and 2, the first pole piece 210 includes a first current collector 211 and a first active material layer 212. The first current collector 211 has a sheet-like structure with a long side 2101 and a wide side 2102. The long side 2101 is the long side of the first current collector 211 in the flattened state, and the extending direction thereof is the length direction of the first current collector 211 in the flattened state; the wide side 2102 is a wide side of the first current collector 211 in a flattened state, and an extending direction of the wide side is a width direction of the first current collector 211 in the flattened state, and in this embodiment, the long side 2101 is perpendicular to the wide side 2102.
In this embodiment, the first current collector 211 is a composite current collector; specifically, it includes a first conductive material layer 2112, an insulating material layer 2111, and a second conductive material layer 2113 which are sequentially stacked in the thickness direction thereof. The insulating material layer 2111 is made of an insulating material, which is a substrate on which the first conductive material layer 2112 and the second conductive material layer 2113 are disposed, and which also physically separates the first conductive material layer 2112 from the second conductive material layer 2113. Optionally, the insulating material layer 2111 comprises a polymeric material; further optionally, the insulating material layer 2111 includes at least one of polyethylene, polypropylene, polystyrene, polymethylmethacrylate, polyvinyl chloride, nylon, polycarbonate, polyurethane, polytetrafluoroethylene, polyethylene terephthalate, epoxy, phenolics, polyimide, melamine formaldehyde resin. The first conductive material layer 2112 and the second conductive material layer 2113 are made of conductive materials, and are respectively disposed on two sides of the insulating material layer 2111, and the specific material composition thereof is not limited in the present application. For example, in the present embodiment, the first pole piece 210 is an anode piece, and the first conductive material layer 2112 and/or the second conductive material layer 2113 may be made of copper; it is understood that in other embodiments of the present application, the first conductive material layer 2112 and/or the second conductive material layer 2113 can also be made of other suitable conductive materials, such as copper alloy, nickel alloy, etc., which are not described in detail herein. In addition, in other embodiments of the present application, the first pole piece 210 may also be a cathode piece, and in this case, the first conductive material layer 2112 and/or the second conductive material layer 2113 may be made of a suitable conductive material such as aluminum, aluminum alloy, and the like, which is not described in detail herein. As for the manner of disposing the first conductive material layer 2112 and the second conductive material layer 2113 on the insulating material layer 2111, it may be sprayed or glued, and the application is not limited thereto.
The first active material layer 212 is disposed on a surface of the first current collector 211, and is a material layer in which lithium ions are intercalated or deintercalated. Specifically, the surface of the first conductive material layer 2112 has a first coating region 21121 and a first blank region 21122; the first coating region 21121 is coated with the first active material layer 212, and the first blank region 21122 is an exposed region where the first active material layer 212 is not disposed; that is, the surface of the first conductive material layer 2112 has a first coating region 21121 in which the first active material layer 212 is provided and a first blank region 21122 in which the first active material layer 212 is not provided. Similarly, the surface of the second conductive material layer 2113 also has a second coating region 21131 provided with the first active material layer 212 and a second blank region 21132 not provided with the first active material layer 212. In this embodiment, the first blank region 21122 and the second blank region 21132 are located at the same end of the first pole piece 210. Specifically, two broad sides 2102 of the first current collector 211 are arranged oppositely along the extending direction of the long side 2101, and the two broad sides 2102 are a first broad side 2102a and a second broad side 2102b respectively. First blank area 21122 extends from first broad side 2102a and toward second broad side 2102b, and second blank area 21132 also extends from first broad side 2102a and toward second broad side 2102 b. It is understood that, in other embodiments of the present application, the positions of the first blank region 21122 and the second blank region 21132 may be adapted on the basis of the above. For example, fig. 5 shows a top view of the first pole piece 210b provided in another embodiment of the present application, which is different from the first pole piece 210 provided in the previous embodiment mainly in that: in the first pole piece 210b, the first blank region 21122b and the second blank region 21132b are provided at opposite ends of the first pole piece 210 in the direction in which the long sides extend. Specifically, the first blank region 21122b extends from the first broad side to the second broad side, and the second blank region 21132 extends from the second broad side to the first broad side. For another example, fig. 6 shows a top view of the first pole piece 210c provided in another embodiment of the present application, which is different from the first pole piece 210 provided in the previous embodiment mainly in that: in the first pole piece 210c, the first blank region 21122c is located at the middle position of the first pole piece along the long-side extending direction, that is, a first coating region 21121c is provided between the first blank region 21122c and each of the first and second wide sides; the second blank region 21132 is located at the middle position of the first pole piece in the long-side extending direction, that is, a second coated region 21131c is provided between the second blank region 21132c and both the first and second wide sides. For another example, fig. 7 shows a top view of the first pole piece 210d provided in another embodiment of the present application, which is different from the first pole piece 210 provided in the previous embodiment in that: in the first pole piece 210d, one of the first blank region 21122d and the second blank region 21132d is located at an end portion of the first pole piece 210b in the extending direction of the long side, and the other is located at the middle portion of the first pole piece 210b in the extending direction of the long side. For example, the first blank region 21122d is located in the middle of the first pole piece 210d, and a first coating region 21121d is disposed between the first and second broadsides and the first blank region 21122 d; the second blank region 21132d extends from one of the first and second broad sides toward the other, and is located at an end of the first pole piece 210 d.
With reference to fig. 3 and fig. 4, and with reference to fig. 1 and fig. 2, the first conductive member 300 is connected to the first conductive material layer 2112, the second conductive member 400 is connected to the second conductive material layer 2113, and the first conductive member 300 is electrically connected to the second conductive member 400, so that the first conductive material layer 2112 and the second conductive material layer 2113 are electrically connected to each other, and the overcurrent capability of the first pole piece 210 can be improved. Specifically, the first conductive member 300 has a sheet structure, one end of which is connected to the first empty region 21122 by welding, and the other end of which extends out of the first current collector 211. The second conductive member 400 is also a sheet-shaped structure, one end of which is connected to the second empty region 21132 by welding, and the other end of which extends out of the first current collector 211; the second conductive member 400 is electrically connected to the first conductive member 300 at a portion of the first conductive member extending out of the first current collector 211. In this embodiment, a distance is provided between the first conductive member 300 and the second conductive member 400 along the extending direction of the long side 2101; the battery 1 further includes a first conductive sheet 310, wherein the first conductive sheet 310 is connected to the first conductive member 300 and the second conductive member 400 respectively, so as to electrically connect the first conductive member 300 and the second conductive member 400. In this embodiment, the first conductive sheet 310 is fixed to the first conductive member 300 and the second conductive member 400 by welding; it is understood that in other embodiments of the present application, the first conductive sheet 310 may also be fixed to the first conductive member 300 and the second conductive member 400 by other methods, or the first conductive sheet 310, the first conductive member 300, and the second conductive member 400 are integrally formed. Optionally, the first conductive sheet 310 in this embodiment is located inside the casing 100; of course, in other embodiments of the present application, the first conductive sheet 310 may also be disposed outside the housing 100, that is, the first conductive member 300 and the second conductive member 400 are connected outside the housing 100.
It is understood that, in other embodiments of the present application, the first conductive element 300 and the second conductive element 400 may be disposed in an overlapping manner in the extending direction of the long side 2101, but the following disadvantages may exist in this disposing manner: on one hand, the overlapping arrangement of the first conductive member 300 and the second conductive member 400 may cause the welded assembly to have a larger thickness at the position, and this may cause the electrode assembly 200 to have a larger deformation at the position after being wound, which may not only facilitate the fixation of the electrode assembly 200 to the case 100, but also increase the probability of lithium deposition of the electrode assembly 200 at the position to some extent; on the other hand, the overlapping arrangement of the first conductive member 300 and the second conductive member 400 may cause the melted material on one side of the first current collector 211 during the welding process to overflow to the other side and further accumulate on the other side, thereby causing a large burr on one side of the first current collector 211, which may raise the risk of piercing the isolation film 230. However, in the embodiment, the first conductive member 300 and the second conductive member 400 are arranged in a staggered manner, so that the risk caused by the overlapping arrangement can be reduced to a certain extent.
Further, the battery 1 further includes a third conductive member 320. Specifically, referring to fig. 3 and 4 in combination with fig. 1 and 2, the third conductive member 320 is connected to the first conductive sheet 310, and at least a portion of the third conductive sheet is exposed outside the casing 100, so as to form a conductive terminal, i.e., a tab, of the battery 1 for connecting an external power device. Specifically, the third conductive member 320 is integrally formed in a plate shape, one end of which is fixed to the first conductive sheet 310 and the other end of which extends out of the housing 100. In this embodiment, the third conductive member 320 is partially accommodated in the casing 100 and partially exposed outside the casing 100; this arrangement can ensure that the first conductive sheet 310 and the third conductive member 320 have better relative fixing effects with the casing 100, but the first conductive sheet 310 needs to occupy a certain usage space in the casing 100, which results in a lower energy density of the battery 1. It should be understood that, in other embodiments, the first conductive sheet 310 may also be located outside the housing 100, and accordingly, the third conductive member 320 is completely exposed outside the housing 100. At this time, on the one hand, the first conductive sheet 310 does not occupy the inner space of the case 100; on the other hand, the first conductive sheet 310 and the third conductive member 320 are movable relative to the casing 100, that is, the overall occupied space of the battery 1 can be reduced by bending the first conductive sheet 310 and/or the third conductive member 320; therefore, disposing the first conductive sheet 310 outside the casing 100 is beneficial to increase the energy density of the battery 1 as a whole.
Optionally, the battery 1 includes a plurality of first conductors 300, a plurality of second conductors 400, a plurality of first conductive sheets 310, and a plurality of third conductors 320. Wherein, each first conductive member 300 is disposed along the extending direction of the long side 2101 at intervals, and each second conductive member 400 is disposed along the extending direction of the long side 2101 at intervals; each first conductive member 300 is electrically connected to a second conductive member 400 through a first conductive sheet 310, and each first conductive sheet 310 is connected to a third conductive member 320. The arrangement of the first conductive member 300 and the second conductive member 400 electrically connected to each other is beneficial to reducing the overall internal resistance of the battery.
It should be understood that, even though the electrical connection between the first conductive member 300 and the second conductive member 400 is realized through the first conductive sheet 310 in the embodiment, the application is not limited thereto; in other embodiments of the present application, the first conductive sheet 310 may be omitted, that is, the first conductive member 300 is directly connected to the second conductive member 400. For example, the electrode assembly 200 is a winding structure, the first conductive member 300 and the second conductive member 400 are respectively located on two different circles of the first pole piece 210 after winding, the two are oppositely arranged along the thickness direction of the battery 1 and are welded and fixed, and at least one of the two extends out of the casing 100 to form a conductive terminal of the battery 1.
Next, the second pole piece 220 of the electrode assembly 200 will be described in detail.
Referring to fig. 8 and 9, in particular, with reference to the second electrode sheet 220, and referring to fig. 1 and 2, the second electrode sheet 220 includes a second current collector 221 and a second active material layer 222. The second current collector 221 is a sheet-like structure having a long side 2201 and a wide side 2202. The long side 2201 is a long side of the second current collector 221 in a flattened state, and an extending direction of the long side is a length direction of the second current collector 221 in the flattened state; the wide side 2202 is a wide side of the second current collector 221 in a flattened state, and an extending direction of the wide side 2202 is a length direction of the second current collector 221 in the flattened state.
In this embodiment, the second current collector 221 is a composite current collector; specifically, it includes a first conductive substance layer 2212, an insulating substance layer 2211, and a second conductive substance layer 2213 which are stacked in this order in the thickness direction thereof. The insulating material layer 2211 is made of an insulating material, and is a base material on which the first conductive material layer 2212 and the second conductive material layer 2213 are disposed, and also physically separates the first conductive material layer 2212 from the second conductive material layer 2213. Optionally, insulating material layer 2211 comprises a polymeric material; further optionally, insulating material layer 2211 comprises at least one of polyethylene, polypropylene, polystyrene, polymethylmethacrylate, polyvinyl chloride, nylon, polycarbonate, polyurethane, polytetrafluoroethylene, polyethylene terephthalate, epoxy, phenolics, polyimide, melamine formaldehyde resin. The first and second conductive layers 2212 and 2213 are made of conductive materials and are disposed on two sides of the insulating layer 2211, and the application is not limited to the specific materials. For example, in the present embodiment, the second electrode sheet 220 is a cathode sheet, and the first and/or second conductive material layers 2212 and 2213 may be made of aluminum; it is understood that in other embodiments of the present application, the first conductive material layer 2212 and/or the second conductive material layer 2213 can also be made of other suitable conductive materials such as aluminum alloy, nickel alloy, etc., which are not described in detail herein. In addition, in other embodiments of the present application, the second pole piece 220 may also be an anode piece, and in this case, the first conductive material layer 2112 and/or the second conductive material layer 2213 may be made of a suitable conductive material such as copper, copper alloy, etc., which is not described in detail herein.
The second active material layer 222 is coated on the surface of the second current collector 221, and is a material layer for lithium ion intercalation or deintercalation. Specifically, the surface of the first conductive material layer 2212 has a first coating region 22121 and a first blank region 22122; wherein the first coating film area 22121 is coated with the second active material layer 222, and the first margin area 22122 is an exposed area where the second active material layer 222 is not disposed; that is, the surface of the first conductive material layer 2212 has the first coating film area 22121 provided with the second active material layer 222 and the first margin area 22122 not provided with the second active material layer 222. Similarly, the surface of the second conductive material layer 2213 also has a second coating region 22131 provided with the second active material layer 222 and a second blank region 22132 not provided with the second active material layer 222. In this embodiment, the first blank area 22122 and the second blank area 22132 are located at the same end of the second pole piece 220. Specifically, two wide sides 2202 of the second current collector 221 are disposed opposite to each other along the extending direction of the long side 2201, and the two wide sides 2202 are a first wide side 2202a and a second wide side 2202b, respectively. The first margin area 22122 extends from the first broad side 2202a and extends toward the second broad side 2202b, and the second margin area 22132 extends from the first broad side 2202a and extends toward the second broad side 2202 b. It is understood that, in other embodiments of the present application, the positions of the first blank area 22122 and the second blank area 22132 may be adaptively modified based on the above. For example, in some implementations, the first and second margin regions 22122 and 22132 are disposed at opposite ends of the second pole piece 220 along the extension direction of the long side; specifically, the first margin region extends from the first wide side to the second wide side, and the second margin region extends from the second wide side to the first wide side. For another example, in other embodiments, a first coating region is disposed between the first wide side and the first margin region, and a second coating region is disposed between the first wide side and the second margin region. For another example, in some embodiments, a first coating region is disposed between each of the first wide side and the second wide side and the first margin region, and the second margin region extends from one of the first wide side and the second wide side toward the other.
Further, in order to realize electronic conduction between the first conductive material layer 2212 and the second conductive material layer 2213, the battery 1 further includes a first conductive element 500 and a second conductive element 600. The first conductive element 500 is connected to the first conductive substance layer 2212, the second conductive element 600 is connected to the second conductive substance layer 2213, and the first conductive element 500 is electrically connected to the second conductive element 600, so that electronic conduction is achieved between the first conductive substance layer 2212 and the second conductive substance layer 2213, and the overcurrent capability of the first pole piece 210 is improved. Specifically, the first conductive element 500 is a sheet-shaped structure, one end of which is connected to the first margin area 22122 by welding, and the other end of which extends out of the first current collector 211. The second conductive element 600 is also a sheet-shaped structure, one end of which is connected to the second margin area 22132 by welding, and the other end of which extends out of the first current collector 211; the second conductive element 600 is electrically connected to the portion of each of the first conductive elements 500 protruding out of the first current collector 211. In this embodiment, a distance is provided between the first conductive element 500 and the second conductive element 600 along the extending direction of the long side 2101; the battery 1 further includes a second conductive sheet 510, wherein the second conductive sheet 510 is connected to the first conductive element 500 and the second conductive element 600 respectively, so as to electrically connect the first conductive member and the second conductive element 600. In this embodiment, the second conductive sheet 510 is fixed to the first conductive element 500 and the second conductive element 600 by welding; it is understood that in other embodiments of the present application, the second conductive sheet 510 may also be fixed to the first conductive element 500 and the second conductive element 600 by other methods, or the second conductive sheet 510, the first conductive element 500 and the second conductive element 600 are integrally formed. Optionally, the second conductive sheet 510 is located inside the housing 100; of course, in other embodiments of the present application, the second conductive sheet 510 may also be disposed outside the casing 100, that is, the first conductive element 500 and the second conductive element 600 are connected outside the casing 100.
It is understood that in other embodiments of the present application, the first conductive element 500 and the second conductive element 600 may be disposed in an overlapping manner in the extending direction of the long sides, but the following disadvantages may exist in this manner: on one hand, the overlapping arrangement of the first conductive member 500 and the second conductive member 600 may cause a welded assembly to have a large thickness at the location, which may cause a large deformation of the electrode assembly 200 at the location after winding, may not facilitate the fixation of the electrode assembly 200 to the case 100, and may increase the probability of lithium deposition at the location to some extent; on the other hand, the overlapping arrangement of the first conductive element 500 and the second conductive element 600 may cause the material melted on one side of the first current collector 211 during the welding process to overflow to the other side and further accumulate on the other side, thereby causing a large burr on one side of the first current collector 211, which may raise the risk of piercing the isolation film 230. However, in the present embodiment, the first conductive element 500 and the second conductive element 600 are arranged in a staggered manner, so that the risk caused by the overlapping arrangement can be reduced to a certain extent.
Further, the battery 1 further includes a third conductive member 520. Specifically, referring to fig. 3 and 4 in combination with fig. 1 and 2, the third conductive element 520 is connected to the second conductive sheet 510, and at least a portion of the third conductive sheet is exposed outside the casing 100, so as to form a conductive terminal of the battery 1 for connecting an external power device. Specifically, the third conductive element 520 is a sheet, one end of which is fixed to the first conductive sheet 310 and the other end of which extends out of the housing 100; at this time, the third conductive element 520 is partially contained in the casing 100 and partially exposed outside the casing 100. As can be understood from the foregoing, in other embodiments, the second conductive sheet 510 may also be located outside the casing 100; at this time, the third conductive element 520 may be completely exposed outside the housing 100.
Optionally, the battery 1 includes a plurality of first conductive elements 500, a plurality of second conductive elements 600, a plurality of second conductive sheets 510, and a plurality of third conductive elements 520. Wherein, each first conductive element 500 is disposed along the extending direction of the long side 2201 at intervals, and each second conductive element 600 is disposed along the extending direction of the long side 2201 at intervals; each first conductive element 500 is electrically connected to a second conductive element 600 through a second conductive sheet 510, and each second conductive sheet 510 is connected to a third conductive element 520.
It should be understood that even though the electrical connection between the first conductive element 500 and the second conductive element 600 is realized through the second conductive sheet 510 in the present embodiment, the present application is not limited thereto; in other embodiments of the present application, the second conductive sheet 510 may also be omitted, i.e., the first conductive element 500 is directly connected to the second conductive element 600. For example, the electrode assembly 200 is a winding structure, the first conductive element 500 and the second conductive element 600 are respectively located on two different circles of the first pole piece 210 after winding, the two circles are oppositely arranged along the thickness direction of the battery 1 and are welded and fixed, and at least one of the two circles extends out of the case 100 to form another conductive terminal of the battery 1.
In the current market, a battery adopting a composite current collector is characterized in that a lug is fixed on the composite current collector in an ultrasonic welding mode, and an insulating material layer in the middle of the composite current collector is locally melted at a corresponding position by high temperature generated by welding, so that two conductive material layers are in contact conduction. This has a high uncertainty, however, because even if the insulating material layer melts, there is a probability that the two conductive material layers will not be in electrical contact; when the two conductive material layers are not in electric contact or are in poor contact, electrons of one of the conductive material layer and the tab on the side away from the tab are difficult to flow to the other, so that the overcurrent capacity of the pole piece is weaker.
Compared with the battery adopting the composite current collector on the market at present, the battery 1 provided by the embodiment of the present application includes a case 100, an electrode assembly 200, a first conductive member 300, and a second conductive member 400. In the electrode assembly 200, the first current collector 211 of the first pole piece 210 includes a first conductive material layer 2112, an insulating material layer 2111, and a second conductive material layer 2113 laminated in this order. First conductive member 300 is connected to first conductive material layer 2112, second conductive member 400 is connected to second conductive material layer 2113, and first conductive member 300 is electrically connected to second conductive member 400. Then, electronic conduction is achieved between the first conductive material layer 2112 and the second conductive material layer 2113. As such, whether a tab is additionally installed directly on the first current collector 211, or indirectly installed on the first current collector 211 by installing a tab on the first conductive member 300 and/or the second conductive member 400, or extending out of the case by using the first conductive member 300 and/or the second conductive member 400 to serve as a tab; both the first conductive material layer 2112 and the second conductive material layer 2113 in the first current collector 211 can realize the circulation of electrons with the tab, and the overcurrent capacity of the first pole piece 210 is large. That is, the battery 1 provided in the embodiment of the present application can improve the current situation that the current battery pole piece using the composite current collector has a weak overcurrent capability.
Based on the same inventive concept, another embodiment of the present application further provides an electronic device. Specifically, referring to fig. 7, which shows a schematic diagram of the electronic device 2, and referring to fig. 1 to 6, the electronic device 2 includes the battery 1 described in any of the embodiments above. In this embodiment, the electronic device is a mobile phone; it can be understood that, in other embodiments of the present application, the electronic device may also be any other electronic device such as a tablet, a computer, an unmanned aerial vehicle, a remote controller, an electric vehicle, and the like.
The electronic device 2 includes the battery, so the electronic device 2 can also improve the current situation that the current battery pole piece adopting the composite current collector has weak overcurrent capability.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; within the context of the present application, where technical features in the above embodiments or in different embodiments can also be combined, the steps can be implemented in any order and there are many other variations of the different aspects of the present application as described above, which are not provided in detail for the sake of brevity; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (12)
1. A battery comprises a first pole piece, a second pole piece and an isolating film, and is characterized in that the first pole piece comprises a first current collector, and the first current collector comprises a first conductive material layer, an insulating material layer and a second conductive material layer which are arranged in a stacked mode;
the battery further includes:
a first conductive member connected to the first conductive material layer; and
and the second conductive piece is connected with the second conductive material layer and is arranged along the extending direction of the long edge of the first current collector, a distance is reserved between the second conductive piece and the first conductive piece, and the first conductive piece and the second conductive piece are electrically connected.
2. The battery of claim 1, further comprising a housing, wherein the first pole piece, the second pole piece, and the separator are housed in the housing.
3. The battery of claim 2, wherein the first conductive member is fixedly connected to the second conductive member, and at least one of the first conductive member and the second conductive member extends out of the housing.
4. The battery of claim 2, further comprising a first conductive tab connected to the first and second conductive members, respectively.
5. The battery of claim 4, further comprising a third conductive member;
the third conductive piece is connected to the first conductive piece, and at least part of the third conductive piece is exposed outside the shell.
6. The battery of claim 4, wherein the first conductive tab is located inside the housing.
7. The battery of claim 4, wherein the conductive tab is located on the exterior of the housing.
8. The battery of claim 1, wherein the first pole piece further comprises a first active material layer;
the surface of the first conductive material layer is provided with a first film coating area provided with a first active material layer and a first blank area not provided with the first active material layer, and the first conductive piece is fixed in the first blank area;
the surface of the second conductive material layer is provided with a second film coating area provided with a first active material layer and a second blank area not provided with the first active material layer, and the second conductive piece is fixed in the second blank area.
9. The battery of claim 8, wherein the first current collector has a first broadside and a second broadside disposed opposite along a direction of extension of the long side;
the first blank area extends from the first wide edge to the second wide edge, and the second blank area extends from the first wide edge to the second wide edge; or, the first blank region extends from the first wide edge to the second wide edge, and the second blank region extends from the second wide edge to the first wide edge; or the first coating area is arranged between the first wide edge and the first blank area, and the second coating area is arranged between the second wide edge and the second blank area; or the first coating region is arranged between the first wide edge and the first blank region, and the second blank region extends from one of the first wide edge and the second wide edge to the other.
10. The battery of claim 1, wherein the battery comprises a plurality of first conductive members and a plurality of second conductive members;
the first conductive pieces are arranged at intervals along the extending direction of the long edge, the second conductive pieces are arranged at intervals along the extending direction of the long edge, and each first conductive piece is correspondingly and electrically connected with one second conductive piece.
11. The battery of claim 1, wherein the second pole piece comprises a second current collector comprising a first conductive substance layer, an insulating substance layer, and a second conductive substance layer, which are sequentially stacked;
the battery further includes:
a first conductive element connected to the first conductive substance layer; and
and the second conductive element is connected to the second conductive substance layer, a distance is reserved between the first conductive element and the second conductive element along the extension direction of the long edge, and the second conductive element is electrically connected with the first conductive element.
12. An electronic device characterized by comprising the battery according to any one of claims 1 to 11.
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| CN202111666330.0A CN114373886A (en) | 2021-12-31 | 2021-12-31 | Battery and electronic equipment |
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| CN202111666330.0A CN114373886A (en) | 2021-12-31 | 2021-12-31 | Battery and electronic equipment |
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| CN114373886A true CN114373886A (en) | 2022-04-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114843441A (en) * | 2022-07-01 | 2022-08-02 | 宁德新能源科技有限公司 | Electrochemical device, method for manufacturing the same, and electronic device |
| WO2023066263A1 (en) * | 2021-10-20 | 2023-04-27 | 华为技术有限公司 | First electrode sheet, bare battery cell, battery, and electronic device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345322A (en) * | 2007-07-11 | 2009-01-14 | 日产自动车株式会社 | Laminate type battery |
| CN208507818U (en) * | 2018-06-29 | 2019-02-15 | 宁德时代新能源科技股份有限公司 | Secondary cell and its pole piece |
| CN209401736U (en) * | 2019-01-28 | 2019-09-17 | 宁德时代新能源科技股份有限公司 | Electrode member, electrode assembly and secondary cell |
| CN112909265A (en) * | 2021-03-26 | 2021-06-04 | 厦门海辰新能源科技有限公司 | Pole piece and cylindrical battery roll core structure |
| CN113097439A (en) * | 2021-03-31 | 2021-07-09 | 珠海冠宇电池股份有限公司 | Pole piece and battery |
-
2021
- 2021-12-31 CN CN202111666330.0A patent/CN114373886A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345322A (en) * | 2007-07-11 | 2009-01-14 | 日产自动车株式会社 | Laminate type battery |
| CN208507818U (en) * | 2018-06-29 | 2019-02-15 | 宁德时代新能源科技股份有限公司 | Secondary cell and its pole piece |
| CN209401736U (en) * | 2019-01-28 | 2019-09-17 | 宁德时代新能源科技股份有限公司 | Electrode member, electrode assembly and secondary cell |
| CN112909265A (en) * | 2021-03-26 | 2021-06-04 | 厦门海辰新能源科技有限公司 | Pole piece and cylindrical battery roll core structure |
| CN113097439A (en) * | 2021-03-31 | 2021-07-09 | 珠海冠宇电池股份有限公司 | Pole piece and battery |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023066263A1 (en) * | 2021-10-20 | 2023-04-27 | 华为技术有限公司 | First electrode sheet, bare battery cell, battery, and electronic device |
| CN114843441A (en) * | 2022-07-01 | 2022-08-02 | 宁德新能源科技有限公司 | Electrochemical device, method for manufacturing the same, and electronic device |
| CN114843441B (en) * | 2022-07-01 | 2022-10-18 | 宁德新能源科技有限公司 | Electrochemical device, method for manufacturing the same, and electronic device |
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