CN115842167A - Battery cell structure, battery monomer, battery and power consumption device - Google Patents

Abstract

The invention relates to a battery cell structure, a battery monomer, a battery and an electric device. At least partially protrudes on the base towards the side of the cap to form a plurality of protrusions. The space on the two sides of the first lug and the space on the two sides of the second lug are respectively filled by utilizing the protruding parts so as to increase the capacity of the battery cell. Meanwhile, the protruding parts arranged at intervals can form a plurality of recessed parts in the direction L from the first lug to the second lug, and the first lug and the second lug are correspondingly arranged in the two adjacent recessed parts respectively. So design for first utmost point ear and second utmost point ear are relative bulge respectively, then present and sink to the inside trend of electric core body, reserve the space for rolling over utmost point ear and utmost point post, have reduced traditional electric core structure horizontal direction keysets and utmost point ear and have piled up extravagant space and utmost point post evagination and crowd the space that accounts for electric core outside, effectively improve the energy density of electric core.

Description

Battery cell structure, battery monomer, battery and power consumption device

Technical Field

The invention relates to the technical field of batteries, in particular to a battery core structure, a battery monomer, a battery and an electric device.

Background

As power batteries are widely used, the requirements for power batteries are also higher and higher. In order to meet the high endurance requirements of consumers, research and development personnel are constantly dedicated to improving the energy density of the battery cell. In traditional electric core, utmost point ear all draws from electric core is inside, forms evagination utmost point post structure after being connected with utmost point post, and the bulge leads to the horizontal direction space between electric core and the top cap to be unable to be utilized, causes the energy density of electric core to hang down on the low side.

Disclosure of Invention

Accordingly, there is a need for a cell structure, a single cell, a battery and an electrical device, which can reduce the space waste and improve the energy density of the cell.

In a first aspect, the present application provides a cell structure, including: the battery cell comprises a battery cell body and a battery cell, wherein the battery cell body comprises a base body and a first tab and a second tab which are arranged on the base body at intervals; the base body is at least partially protruded towards one side of the top cover to form a plurality of protruding portions, all the protruding portions are arranged at intervals in the direction L from the first pole lug to the second pole lug, the protruding portions are adjacent to each other, the protruding portions form recessed portions, and the first pole lug and the second pole lug are correspondingly located in the recessed portions respectively.

The battery cell structure at least partially protrudes from one side of the base body facing the top cover to form a plurality of protruding parts. The space on the two sides of the first lug and the space on the two sides of the second lug are respectively filled by utilizing the protruding parts so as to increase the capacity of the battery cell. Simultaneously, follow first utmost point ear extremely on the direction L of second utmost point ear, the bulge that the interval was arranged can form a plurality of depressed part, and corresponds respectively in two adjacent depressed parts and has first utmost point ear and second utmost point ear. So design for first utmost point ear and second utmost point ear are relative bulge respectively, then present and sink to the inside trend of electric core body, reserve the space for rolling over utmost point ear and utmost point post, have reduced traditional electric core structure horizontal direction keysets and utmost point ear and have piled up extravagant space and utmost point post evagination and crowd the space that accounts for electric core outside, effectively improve the energy density of electric core.

In some embodiments, the base includes a first pole piece, a diaphragm and a second pole piece, which are alternately stacked in sequence, a first lead-out piece and a first notch are alternately arranged on an edge of the first pole piece, a second lead-out piece opposite to the first notch and a second notch opposite to the first lead-out piece are alternately arranged on an edge of the second pole piece, all the first lead-out pieces and all the second lead-out pieces are correspondingly stacked to form the first tab and the second tab, and all the first notches and all the second notches are stacked to form two recesses respectively. By the design, the first pole piece and the second pole piece can be quickly and effectively prepared into a required battery cell structure during molding, and waste of a current collector during battery cell die cutting is reduced; and meanwhile, the forming efficiency of the cell structure is effectively improved.

In some embodiments, a first cut and a second cut are spaced apart from each other on the edge of the diaphragm, the first cut is disposed opposite to the first notch, and the second cut is disposed opposite to the second notch. Therefore, the waste of the diaphragm when the battery core is subjected to die cutting is reduced; and simultaneously, the forming efficiency of the cell structure is accelerated.

In some embodiments, in a direction L from the first tab to the second tab, the substrate has a first side surface and a second side surface which are opposite to each other, one side surface of the protruding portion facing away from the recessed portion is flush with the first side surface, and the other side surface of the protruding portion facing away from the recessed portion is flush with the second side surface. Therefore, the phenomenon that the space between the battery cell structure and the shell cannot be utilized and is wasted is effectively avoided.

In some embodiments, the first tab and the second tab are both bent, and in the height direction H of the cell structure, a side surface of the protruding portion, which faces away from the base body, is higher than or flush with the bent first tab and the bent second tab, so that the external space of the cell structure occupied by the outward protrusion of the conventional pole is reduced, and the improvement of the energy density of the cell structure is facilitated.

In some embodiments, the protrusion is integrally formed with the base.

In a second aspect, the present application provides a battery cell comprising: the cell structure of any of the above; a housing having an opening; the top cover, the lid is established on the opening and with form between the casing hold the chamber, the interval runs through on the top cover and is equipped with two utmost point posts, electric core structure accept in hold the intracavity, first utmost point ear with the second utmost point ear respectively with two utmost point post electric connection.

In some embodiments, at least two positions of the top cover protrude in a direction toward the inside of the recess, two grooves are formed on a side surface of the top cover facing away from the cell structure, and the two poles respectively penetrate through groove bottoms of the two grooves. So, utilize the recess on the top cap for utmost point post sinks towards electricity core structure one side, can effectively solve utmost point post evagination and occupy the problem in the exterior space of electricity core structure, can reserve the lead wire space for the encapsulation battery again.

In some embodiments, the height of the pole on the top cover is adjustable in a height direction H of the cell structure. The regulation that sinks in the recessed part with utmost point post one end orientation is convenient like this to shorten first utmost point ear and second utmost point ear in the inner space of electric core structure, be favorable to improving the capacity of electric core structure.

In some embodiments, the single battery further includes two adapters, and the first tab and the second tab are electrically connected to the two poles through the adapters respectively. So, utilize the adaptor for first utmost point ear and second utmost point ear correspond respectively and realize effectual electricity with two utmost point posts and be connected.

In a third aspect, the present application provides a battery comprising a battery cell as described in any one of the above.

In a fourth aspect, the present application provides an electric device comprising the battery described above.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:

FIG. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

FIG. 2 is an exploded view of a battery according to some embodiments of the present application;

fig. 3 is a cross-sectional view of a battery cell structure according to some embodiments of the present application;

fig. 4 is a schematic diagram of a cell structure according to some embodiments of the present application;

FIG. 5 is a schematic view of a first pole piece, a diaphragm, and a second pole piece according to some embodiments of the present disclosure;

FIG. 6 is a first schematic view of a top cover structure according to some embodiments of the present disclosure;

fig. 7 is a second schematic view of a top cover structure according to some embodiments of the present disclosure.

10000. A vehicle;

1000. a battery; 2000. a controller; 3000. a motor;

100. a battery cell; 110. a cell structure; 111. a cell body; 1111. a base; 1112. a first tab; 1113. a second tab; 1114. a first side; 1115. a second side surface; 112. a projection; 1121. a recessed portion; 113. a first pole piece; 1131. a first lead-out sheet; 1132. a first notch; 114. a second pole piece; 1141. a second lead-out sheet; 1142. a second notch; 115. a diaphragm; 1151. a first cut; 1152. a second cut; 120. a housing; 121. an opening; 122. an accommodating chamber; 130. a top cover; 131. a groove; 140. a pole column; 150. an adapter;

200. a box body; 210. a first portion; 220. a second portion.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is only one kind of association relationship describing the association object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two sets), "plural pieces" refers to two or more (including two pieces).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

At present, the application of the power battery is more and more extensive from the development of market situation. As power batteries are widely used, the requirements for power batteries are also higher and higher. In order to meet the high endurance requirements of consumers, research and development personnel are constantly dedicated to improving the energy density of the battery cell.

The inventor notices that when the cell structure is designed, the positive and negative electrode lugs can be led out from the interior of the cell and respectively and correspondingly connected to the two pole posts to form a convex pole post structure. And the bulge leads to producing the horizontal direction space between electric core and the top cap and the utmost point post crowds the exterior space of occupying the electric core when the utmost point post evaginates, and these two kinds of spaces all can't be by rational utilization to lead to the whole energy density of electric core to be on the low side.

In order to alleviate the problem of low cell energy density, the applicant has found that the cathode terminal may protrude downward and partially enter the middle channel of the laminated cell to reduce the horizontal space between the cell and the top cap. However, the cathode terminal protrudes downward, which inevitably causes the tab to sink toward the inside of the battery cell. The way of raising the pole pieces on the two sides of the pole lug by the pole piece at the position of the sacrificial pole lug is not to increase the whole capacity of the battery cell, but part of the pole pieces can be reduced at the position of the pole lug, so that the energy density of the battery cell is still in a low state.

In view of the above, in order to solve the problem of low energy density of the battery cell due to the waste of space, the inventors have conducted extensive studies to design a battery cell structure in which a side of the base body facing the top cover at least partially protrudes to form a plurality of protruding portions. All the protruding portions are arranged at intervals along the direction L from the first pole lug to the second pole lug, a recessed portion is formed between every two adjacent protruding portions, and the first pole lug and the second pole lug are correspondingly located in every two adjacent recessed portions respectively.

In such a cell structure, the side of the base body facing the top cover at least partially protrudes to form a plurality of projections. Utilize the bulge to fill up the both sides space of first utmost point ear and the both sides space of second utmost point ear respectively to increase electric core capacity, thereby effectively solve because of the extravagant problem that leads to the energy density of electric core on the low side of space.

In addition, on the direction L from first utmost point ear to second utmost point ear, the bulge of interval arrangement can form a plurality of depressed part, and corresponds respectively in two adjacent depressed parts and has first utmost point ear and second utmost point ear. At this moment, first utmost point ear and second utmost point ear are relative bulge respectively, then appear sinking to the inside trend of electricity core body (presenting the state of sinking relatively speaking promptly, but do not actually sink first utmost point ear and second utmost point ear), reserve the space for rolling over utmost point ear and utmost point post, reduced traditional electric core structure horizontal direction keysets and utmost point ear and piled up extravagant space and utmost point post evagination and crowded the space that occupies electricity core outside, effectively improve the energy density of electric core.

The battery cell structure disclosed by the embodiment of the application can be suitable for a battery cell, wherein the battery cell can be but is not limited to be used in electric devices such as vehicles, ships or aircrafts; can use and possess the power supply system who constitutes this power consumption device such as the battery monomer, battery that this application discloses, like this, be favorable to having reduced traditional electric core structure horizontal direction switching piece and utmost point ear and piled up extravagant space and utmost point post evagination and crowded the space that accounts for electric core outside, effectively improve the energy density of electric core.

The embodiment of the application provides an electric device using a battery as a power supply, wherein the electric device can be but is not limited to a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like. The electric toy may include a stationary or mobile electric toy, such as a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, and the like.

For convenience of description, the following embodiments are described by taking an electric device as an example of a vehicle according to an embodiment of the present application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 10000 according to some embodiments of the present disclosure. The vehicle 10000 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extended automobile and the like. The inside of the vehicle 10000 is provided with a battery 1000, and the battery 1000 may be provided at the bottom or the head or the tail of the vehicle 10000. The battery 1000 may be used for power supply of the vehicle 10000, for example, the battery 1000 may serve as an operation power source of the vehicle 10000. The vehicle 10000 can further include a controller 2000 and a motor 3000, wherein the controller 2000 is used for controlling the battery 1000 to supply power to the motor 3000, for example, for starting, navigation and operation power demand of the vehicle 10000.

In some embodiments of the present application, the battery 1000 may be used as an operating power source of the vehicle 10000, and may also be used as a driving power source of the vehicle 10000 to provide driving power for the vehicle 10000 instead of or partially instead of fuel or natural gas.

Referring to fig. 2, fig. 2 is an exploded view of a battery 1000 according to some embodiments of the present disclosure. The battery 1000 includes a case 200 and the battery cell 100, and the battery cell 100 is accommodated in the case 200. The case 200 is used to provide a receiving space for the battery cell 100, and the case 200 may have various structures.

In some embodiments, the case 200 may include a first portion 210 and a second portion 220, the first portion 210 and the second portion 220 cover each other, and the first portion 210 and the second portion 220 together define a receiving space for receiving the battery cell 100. The second part 220 may be a hollow structure with an opening 121 at one end, the first part 210 may be a plate-shaped structure, and the first part 210 covers the opening 121 side of the second part 220, so that the first part 210 and the second part 220 define a containing space together; the first portion 210 and the second portion 220 may be hollow structures each having one side opening 121, and the opening 121 of the first portion 210 is covered on the opening 121 side of the second portion 220. Of course, the first portion 210 and the second portion 220 may form the box 200 in various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In the battery 1000, the number of the battery cells 100 may be multiple, and the multiple battery cells 100 may be connected in series or in parallel or in series-parallel, where in series-parallel refers to both series connection and parallel connection among the multiple battery cells 100. The plurality of battery monomers 100 can be directly connected in series or in parallel or in series-parallel, and the whole formed by the plurality of battery monomers 100 is accommodated in the box body 200; of course, the battery 1000 may also be formed by connecting a plurality of battery cells 100 in series, in parallel, or in series-parallel to form a battery 1000 module, and then connecting a plurality of battery 1000 modules in series, in parallel, or in series-parallel to form a whole, and accommodating the whole in the case 200. The battery 1000 may further include other structures, for example, the battery 1000 may further include a bus member for achieving electrical connection between the plurality of battery cells 100.

Wherein each battery cell 100 may be a secondary battery or a primary battery; but is not limited to, a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery. The battery cell 100 may be cylindrical, flat, rectangular parallelepiped, or other shape.

Referring to fig. 3, according to some embodiments of the present application, a cell structure 110 is provided. Cell structure 110 includes: a cell body 111 and a plurality of protrusions 112. The cell body 111 includes a substrate 1111 and a first tab 1112 and a second tab 1113 spaced apart from each other on the substrate 1111. A plurality of projections 112 are formed by at least partially projecting the base 1111 toward the side of the top cover 130. All the protruding portions 112 are spaced in the direction L from the first tab 1112 to the second tab 1113, and a recess 1121 is formed between two adjacent protruding portions 112. The first tab 1112 and the second tab 1113 are respectively and correspondingly located in two adjacent recesses 1121.

The substrate 1111 is formed by alternately stacking a positive plate, a diaphragm 115 and a negative plate, and the structural form of the substrate can be a laminated type or a winding type. The laminated substrate 1111 is generally a laminated cell formed by laminating positive and negative electrode sheets and a separator 115 one by one in the order of positive electrode-separator 115-negative electrode, with a current collector as a lead-out electrode tab (a first electrode tab 1112 and a second electrode tab 1113). The lamination method includes a direct lamination method in which the separator 115 is cut, and a folding method in which the separator 115 is not cut.

The winding substrate 1111 is usually welded to the current collector by ultrasonic welding, wherein tabs (a first tab 1112 and a second tab 1113 have opposite polarities, one of the tabs is a positive tab, and the other tab is a negative tab) are welded to the current collector by ultrasonic welding, the positive tab adopts an aluminum tab, and the negative tab adopts a nickel tab; then arranging the positive plate-diaphragm 115-negative electrode-diaphragm 115; the assembled cylindrical or square cells are then wound. The first tab 1112 and the second tab 1113 are metal conductors led out from the positive and negative electrode sheets, respectively, such as: the positive tab is usually an aluminum strip; the negative electrode tabs are typically nickel or copper-plated nickel strips.

The protrusion 112 is formed by protruding at least partially from the side of the base 1111 facing the top cover 130, and in actual manufacturing, a corresponding portion of the current collector can be reserved on the base 1111. Of course, other forming processes may be used in the manufacturing process, and are not limited herein. The recessed portions 1121 are formed between two adjacent protruding portions 112, so that the first tab 1112 and the second tab 1113 are respectively located in two recessed portions 1121, so that the first tab 1112 and the second tab 1113 appear to sink towards the inside of the battery cell, it should be noted that the first tab 1112 and the second tab 1113 do not actively sink towards the inside of the battery cell in the actual manufacturing process, but the peripheral protruding portions 112 make the first tab 1112 and the second tab 1113 respectively located in the corresponding recessed portions 1121 to show a sinking appearance. Therefore, effective space is reserved for the folded electrode lug and the electrode column 140, and the space of the traditional battery cell structure, namely the space wasted by stacking the adapter plate and the electrode lug in the horizontal direction, and the space occupied by the outward extrusion of the electrode column 140 outside the battery cell are favorably reduced.

At least partially protrudes on the side of the base 1111 facing the cap 130 to form a plurality of protrusions 112. At this time, the protruding portion 112 may be used to fill up the spaces on both sides of the first tab 1112 and the spaces on both sides of the second tab 1113, respectively, so as to increase the cell capacity. Meanwhile, in the direction L from the first tab 1112 to the second tab 1113, a plurality of recesses 1121 are formed by the protrusions 112 arranged at intervals, and the first tab 1112 and the second tab 1113 are respectively and correspondingly formed in two adjacent recesses 1121. So design, can make first utmost point ear 1112 and second utmost point ear 1113 respectively relative bulge 112, then present and sink to the inside trend of electric core body 111, reserve the space for rolling over utmost point ear and utmost point post 140, reduced traditional electric core structure 110 horizontal direction switching piece and utmost point ear and piled up extravagant space and utmost point post 140 evagination crowded space that occupies electric core outside, effectively improved the energy density of electric core.

According to some embodiments of the present application, referring to fig. 4 and 5, optionally, the base 1111 includes a first pole piece 113, a diaphragm 115 and a second pole piece 114, which are alternately stacked in sequence. The first tab 113 has a first tab 1131 and a first notch 1132 spaced apart from each other at an edge thereof. The second tab 1141 opposite to the first notch 1132 and the second notch 1142 of the first tab 1131 are spaced apart from each other on the edge of the second tab 114. All the first lead-out pieces 1131 and all the second lead-out pieces 1141 are correspondingly stacked to form a first tab 1112 and a second tab 1113, respectively. All the first notches 1132 and all the second notches 1142 are overlapped to form two recesses 1121, respectively.

The first pole piece 113 and the second pole piece 114 each include a thin plate serving as a current collector, such as: aluminum plate, nickel plate, etc. during the manufacturing process, there are two forming ways, for example: lamination and winding. However, in both the lamination process and the winding process, the number of the first tab 1131 and the first notch 1132 on any one first pole piece 113 may be one or more; the number of the second lead-out pieces 1141 and the second notches 1142 on any second pole piece 114 may be one or more.

In the lamination forming process, when the number of the first tab 1131 and the first gap 1132 on the first pole piece 113 is one, and the number of the second tab 1141 and the second gap 1142 on the second pole piece 114 is also one, the first pole piece 113, the diaphragm 115 and the second pole piece 114 only need to be arranged alternately in sequence. When the number of the first lead-out pieces 1131 and the number of the first gaps 1132 on the first pole piece 113 are both multiple, and the number of the second lead-out pieces 1141 and the number of the second gaps 1142 on the second pole piece 114 are also multiple, the first pole piece 113, the diaphragm 115 and the second pole piece 114 need to be cut after being sequentially and alternately arranged.

In the winding process, when the number of the first tab 1131 and the first gap 1132 on the first pole piece 113 is one, and the number of the second tab 1141 and the second gap 1142 on the second pole piece 114 is also one, the first pole piece 113, the diaphragm 115 and the second pole piece 114 are sequentially and alternately arranged and then wound; the first tab 1112 and the second tab 1113 are formed by a first tab 1131 and a second tab 1141, respectively. When the number of the first tab 1131 and the first notch 1132 on the first pole piece 113 is multiple, and the number of the second tab 1141 and the second notch 1142 on the second pole piece 114 is multiple, the first tab 1112 is formed by winding and overlapping the multiple first tabs 1131, and the second tab 1113 is formed by winding and overlapping the multiple second tabs 1141.

The separator 115 is a porous plastic film, which ensures free passage of lithium ions to form a circuit, and prevents the electrodes from contacting each other to perform an electronic insulation function. The kind of the film can be selected from, but not limited to, polyethylene single layer film, polypropylene single layer film and the like.

In addition, when the first pole piece 113 and the second pole piece 114 are sequentially overlapped, the pole piece portions at both sides of the first notch 1132 are overlapped with each other, and the pole piece portions at both sides of the second notch 1142 can be formed to correspond to the protruding portion 112 on the base 1111.

A first notch 1132 and a second notch 1142 are respectively and correspondingly arranged on the first pole piece 113 and the second pole piece 114 in advance (namely, the first pole piece 113 and the second pole piece 114 are cut into an approximate sawtooth shape in advance), the first notch 1132 corresponds to the second lead-out piece 1141, and the second notch 1142 corresponds to the first lead-out piece 1131, so that the first pole piece 113 and the second pole piece 114 can quickly and effectively prepare a required cell structure 110 during molding, and waste of a current collector during cell die cutting is reduced; and simultaneously, the forming efficiency of the cell structure 110 is effectively improved.

According to some embodiments of the present application, optionally, referring to fig. 5, a first shear 1151 and a second shear 1152 are spaced apart from each other on the edge of the diaphragm 115. The first cutout 1151 is disposed opposite the first notch 1132. Second cutout 1152 is located opposite second notch 1142.

The number of the first and second cuts 1151 and 1152 may be determined according to the number of the first and second notches 1132 and 1142, for example: when the first notch 1132 and the second notch 1142 are both one, a first shear 1151 and a first second shear 1152 are respectively disposed on the edge of the diaphragm 115. When the first gap 1132 and the second gap 1142 are provided in plural numbers, a plurality of first cuts 1151 and a plurality of second cuts 1152 are provided on the edge of the diaphragm 115. At this time, it should be noted that, since the first notch 1132 and the second notch 1142 are respectively disposed in a staggered manner, the first shearing port 1151 and the second shearing port 1152 are alternately disposed on the diaphragm 115.

A first shear 1151 and a second shear 1152 are correspondingly arranged on the edge of the diaphragm 115 in advance, so that waste of the diaphragm 115 during die cutting of the battery cell is reduced; and at the same time, the forming efficiency of the cell structure 110 is accelerated.

According to some embodiments of the present application, optionally, referring to fig. 3, the substrate 1111 has a first side surface 1114 and a second side surface 1115 opposite to each other in a direction L from the first tab 1112 to the second tab 1113. One side surface of one side protrusion 112 facing away from the recess 1121 is flush with the first side surface 1114, and one side surface of the other side protrusion 112 facing away from the recess 1121 is flush with the second side surface 1115.

A plurality of protrusions 112 are spaced apart in the direction L from the first tab 1112 to the second tab 1113, and therefore, one side protrusion 112 can be understood as the protrusion 112 adjacent to the first side 1114; the other side protrusion 112 can be understood as a protrusion 112 adjacent to the second side 1115.

The protrusion 112 is formed by protruding the base 1111 toward the top cover 130, and the protruding height thereof may be determined according to the actual size of the battery cell 100.

Specifically, one side of the protruding portion 112 facing away from the base 1111 is attached or approximately attached to one side of the top cover 130 facing the casing 120, so that the space between the cell structure 110 and the top cover 130 is fully utilized, and the capacity of the cell structure 110 is improved.

In addition, a certain gap exists between one side surface of the protruding portion 112 facing the first tab 1112 and the first tab 1112, and the gap should be designed to be as small as possible so as to reduce the waste of space between the protruding portion 112 and the first tab 1112 and improve the capacity of the cell structure 110. Similarly, a certain gap exists between the side of the protruding portion 112 facing the second pole piece 1113 and the second pole piece 1113, and the gap should be designed to be as small as possible.

In the direction L from the first tab 1112 to the second tab 1113, the protruding portions 112 located on both sides are respectively and correspondingly flush with the first side 1114 and the second side 1115, so as to avoid steps on opposite side surfaces of the cell structure 110, which results in that the inner side wall of the casing 120 cannot be tightly attached to both side surfaces of the cell structure 110, thereby effectively avoiding the waste caused by the fact that a space between the cell structure 110 and the casing 120 cannot be utilized.

According to some embodiments of the present application, optionally, referring to fig. 3, the first tab 1112 and the second tab 1113 are both disposed in a bent manner. In the height direction H of the cell structure 110, the side of the protruding portion 112 facing away from the base 1111 is higher than or flush with the first tab 1112 and the second tab 1113 after being bent.

The first tab 1112 and the second tab 1113 are bent to: 1. increasing the contact area between the first lug 1112 and the second lug 1113 and the adapter plate respectively to enhance the connection strength between the first lug 1112 and the second lug 1113 and the adapter plate respectively; 2. the protruding amount of the first tab 1112 and the second tab 1113 toward the top cover 130 is reduced, and the first tab 1112 and the second tab 1113 occupy the inner space of the cell structure 110. During bending, attention needs to be paid to the structural states of the first tab 1112 and the second tab 1113, so as to avoid the risk of breakage and the like during bending.

In addition, the fact that the side of the projection 112 facing away from the base 1111 is higher than or flush with the first tab 1112 and the second tab 1113 after bending is to be understood as: the first tab 1112 and the second tab 1113 that are bent have the highest ends in the height direction H of the cell structure 110, and the highest ends of the first tab 1112 and the second tab 1113 are all lower than or flush with a side of the protruding portion 112 facing away from the base 1111.

Specifically, one side surface of the protruding portion 112, which faces away from the base 1111, is higher than the first tab 1112 and the second tab 1113 after being bent, so that the reserved space at the first tab 1112 and the second tab 1113 is larger, a space is reserved for the adaptor sheet and the terminal 140 to sink, and the external space occupied by the outward protrusion of the terminal 140 in the cell structure 110 is further reduced.

The first tab 1112 and the second tab 1113 after bending are both lower than or flush with the protruding portion 112, so as to reserve a space for the adaptor sheet and the terminal 140 to sink, reduce the external space of the electrical core structure 110 occupied by the outward protrusion of the conventional terminal 140, and facilitate improvement of the energy density of the electrical core structure 110.

According to some embodiments of the present application, optionally, referring to fig. 3, the protrusion 112 and the base 1111 are formed as a single-piece structure.

Alternatively, the integral molding manner may be, but is not limited to, cutting, stamping, and the like.

The protruding portion 112 and the base 1111 are designed to be an integrated structure, which is beneficial to improving the compactness of the battery cell structure 110 and ensuring the stable structure.

According to some embodiments of the present application, please refer to fig. 3, the present application further provides a battery cell 100, including: a casing 120, a top cover 130, and a cell structure 110 as in any of the above solutions. The housing 120 has an opening 121. The top cover 130 covers the opening 121 and forms an accommodating chamber 122 with the housing 120. Two poles 140 are arranged on the top cover 130 at intervals. Cell structure 110 is housed in housing cavity 122. The first tab 1112 and the second tab 1113 are electrically connected to the two poles 140 respectively.

The pole 140 disposed through the top cover 130 should be understood as: the pole 140 is mounted on the top cap 130, and one end of the pole extends out of or is flush with a side surface of the top cap 130, which faces away from the cell structure 110; the other end extends out of or is flush with a side of the top cover 130 facing the cell structure 110.

In addition, the pole 140 may be fixedly or adjustably mounted to the top cap 130. Such as: the post 140 is movably mounted on the top cap 130 by means of threads, snap-fit or pin-joint. The specific adjustment mode can be as follows: the mounting position of the pole 140 on the top cover 130 can be adjusted by rotating the pole 140; or, in the adjusting process, the clamping or pin joint between the pole 140 and the top cover 130 can be firstly released; after the release, the post 140 is adjusted to the required position; after adjustment, the pole 140 is fixed again in a clamping or pin joint manner. At this time, a plurality of detents or pin holes may be formed on the post 140 at intervals along the length direction thereof; or a kidney-shaped hole or a groove structure and the like are formed in the pole 140 in an extending manner along the length direction of the pole.

In the battery cell 100, by using the battery cell structure 110 in the above scheme, the protruding portion 112 is used to fill up the space on both sides of the first tab 1112 and the space on both sides of the second tab 1113, so as to increase the battery cell capacity. Meanwhile, the first tab 1112 and the second tab 1113 are made to sink inside the cell body 111, so that a space is reserved for the tab and the terminal 140, the space of the traditional cell structure 110 in which the tab and the tab are stacked in the horizontal direction and the space of the terminal 140 outside the cell is occupied by the outward protrusion of the terminal 140 are reduced, and the energy density of the cell is effectively improved.

According to some embodiments of the present application, optionally, referring to fig. 6, at least two positions on the top cover 130 are protruded toward the inside of the recess 1121, and two grooves 131 are formed on a side surface of the top cover 130 facing away from the cell structure 110, and the two poles 140 are respectively and correspondingly penetrated through groove bottoms of the two grooves 131.

The top cover 130 is protruded toward the inside of the recess 1121 at least two places to form a groove 131 at one side surface, and the shape thereof is variously designed, for example: the cross-sectional shape of the groove 131 may be, but is not limited to, square, trapezoidal, semicircular, semi-elliptical, etc.

The mounting of the pole 140 at the bottom of the groove 131 is understood to be: the pole 140 penetrates through the bottom of the groove 131, and one end of the pole is located in the groove 131, and the other end of the pole extends out of or is flush with a side surface of the top cover 130 facing the cell structure 110. Meanwhile, one end of the pole 140 may not extend out of the groove 131; or may extend out of the recess 131. When one end of the post 140 does not extend out of the groove 131, the end can be flush with the surfaces of the post 140 on the two sides of the groove 131; or lower than the surfaces of the posts 140 on both sides of the grooves 131.

Utilize recess 131 on top cap 130 for utmost point post 140 sinks towards electric core structure 110 one side, can effectively solve utmost point post 140 evagination and occupy the problem of electric core structure 110's exterior space, can reserve the lead wire space for encapsulation (pack) again.

According to some embodiments of the present application, optionally, referring to fig. 7, in a height direction H of the battery cell structure 110, a height of the pole 140 on the top cover 130 is adjustable.

One end of the pole 140 may be higher than a side (i.e., outer surface) of the cap 130 facing away from the cell structure 110 for adjustment; or may be adjusted below the side of the top cover 130 facing away from the cell structure 110. Such as: at the time of height adjustment, the outer surface of the top cover 130 is used as a height reference, i.e., the height is zero. The height distance between the end of the pole 140 away from the cell structure 110 and the side of the cap 130 facing away from the cell structure 110 may be-20 mm to 7mm. For example, the height distance between the two can be-20 mm, -18mm, -15mm, -10mm, -5mm, 0mm, 2mm, 5mm, 7mm. Wherein, a negative value indicates that one end of the pole 140 is lower than a side of the cap 130 facing away from the cell structure 110; while a positive value indicates that the end of the terminal post 140 is higher than a side of the cap 130 facing away from the cell structure 110.

Design utmost point post 140 for height-adjustable on top cap 130, conveniently like this with utmost point post 140 one end towards sunken portion 1121 in adjustment that sinks to shorten first utmost point ear 1112 and second utmost point ear 1113 in the inner space of electric core structure 110, be favorable to improving the capacity of electric core structure 110.

According to some embodiments of the present application, optionally, referring to fig. 3, the battery cell 100 further includes two adapters 150. The first tab 1112 and the second tab 1113 are electrically connected to the two poles 140 through the adaptor 150.

The connection between the first tab 1112 and the second tab 1113, respectively, and the adaptor 150 may be, but not limited to, welding, clamping, etc.

By using the adaptor 150, the first tab 1112 and the second tab 1113 are respectively and correspondingly electrically connected to the two poles 140.

According to some embodiments of the present application, the present application also provides a battery 1000 including the battery cell 100 of any one of the above aspects.

According to some embodiments of the present application, the present application also provides an electric device including the battery 1000 of the above aspect.

The powered device may be any of the aforementioned devices or systems that employ the battery 1000.

According to some embodiments of the present application, please refer to fig. 3 to 7, the present application further provides a battery cell structure 110, wherein the first tab 1112 and the second tab 1113 are respectively sunk into the battery cell structure 110, and the spaces on two sides of the conventional tab are filled up by the pole pieces, so as to increase the capacity of the battery cell. Meanwhile, the first tab 1112 and the second tab 1113 sink into the battery cell structure 110 respectively, so as to leave a space for folding the tab and the adaptor 150, thereby reducing the space wasted by stacking the conventional adaptor sheet and the tab in the horizontal direction. In addition, the pole piece and the diaphragm 115 are cut into a sawtooth shape, so that waste of the current collector during die cutting is reduced. Further, this scheme still sinks the utmost point post 140 of top cap 130, leaves the lead wire space for pack.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; 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 or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims (12)

1. A cell structure, comprising:

the battery cell comprises a battery cell body and a battery cell body, wherein the battery cell body comprises a base body and a first lug and a second lug which are arranged on the base body at intervals;

the base body is at least partially protruded towards one side of the top cover to form a plurality of protruding portions, all the protruding portions are arranged at intervals in the direction L from the first pole lug to the second pole lug, the protruding portions are adjacent to each other, the protruding portions form recessed portions, and the first pole lug and the second pole lug are correspondingly located in the recessed portions respectively.

2. The cell structure according to claim 1, wherein the substrate comprises first pole pieces, a diaphragm and second pole pieces, which are alternately stacked in sequence, a first lead-out piece and a first notch are arranged at an interval on an edge of the first pole piece, a second lead-out piece opposite to the first notch and a second notch opposite to the first lead-out piece are arranged at an interval on an edge of the second pole piece, all the first lead-out pieces and all the second lead-out pieces are stacked correspondingly to form the first tab and the second tab, and all the first notches and all the second notches are stacked to form the two recesses respectively.

3. The cell structure of claim 2, wherein a first notch and a second notch are spaced apart from each other on the edge of the separator, the first notch is disposed opposite to the first notch, and the second notch is disposed opposite to the second notch.

4. The cell structure of claim 1, wherein the substrate has a first side and a second side opposite to each other in a direction L from the first tab to the second tab, and wherein a side of the protruding portion facing away from the recessed portion is flush with the first side and a side of the protruding portion facing away from the recessed portion is flush with the second side.

5. The cell structure of claim 1, wherein the first tab and the second tab are both bent, and in a height direction H of the cell structure, a side surface of the protruding portion, which faces away from the base, is higher than or flush with the bent first tab and the bent second tab.

6. The cell structure of any of claims 1-5, wherein the protrusion is integrally formed with the substrate.

7. A battery cell, comprising:

the cell structure of any of claims 1-6;

a housing having an opening;

the top cap, the lid is established on the opening and with form between the casing and hold the chamber, the interval runs through on the top cap and is equipped with two utmost point posts, electric core structure accept in hold the intracavity, first utmost point ear with second utmost point ear respectively with two utmost point post electric connection.

8. The battery cell according to claim 7, wherein at least two positions of the top cover protrude toward the inside of the recessed portion, two grooves are formed on a side surface of the top cover facing away from the cell structure, and the two terminals respectively penetrate through bottoms of the two grooves.

9. The battery cell as recited in claim 7, wherein the height of the terminal post on the top cover is adjustable in a height direction H of the cell structure.

10. The single battery cell according to any one of claims 7 to 9, further comprising two adapters, wherein the first tab and the second tab are electrically connected to the two poles respectively through the adapters.

11. A battery comprising the battery cell of any one of claims 7-10.

12. An electric device comprising the battery according to claim 11.

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