Battery and electronic device

Abstract

The application relates to the battery technical field and discloses a battery and an electronic device. The battery comprises a shell, an electrode assembly and a tab. The shell comprises a first end wall, a second end wall and a connecting wall part. The first end wall and the second end wall are both L-shaped and are arranged at intervals along the thickness direction of the battery; the connecting wall part extends from the edge of the first end wall to the second end wall and encloses an L-shaped receiving cavity, the first end wall is arranged at one end of the receiving cavity, and the second end wall is arranged at the other end of the receiving cavity. The shell of the battery provided by the application is L-shaped, so that when the battery is applied to an electronic device with an L-shaped battery compartment, the two parts of the battery that are bent relative to each other can be respectively filled in the two cavities of the L-shaped battery compartment, so that the L-shaped battery compartment can be better utilized. That is, the battery provided by the application can improve the current situation that the battery cannot well utilize the L-shaped battery compartment in the electronic device.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of battery, in particular to a battery and an electronic device. BACKGROUND

[0002] A battery is a device that converts energy from the outside into electrical energy and stores it inside, so as to supply power to external devices (such as portable electronic devices) at the required time. At present, batteries are widely used in electronic devices such as mobile phones, tablets, notebook computers, electric vehicles, etc.

[0003] At present, most batteries are in the form of a square or a circle; accordingly, the electronic device is provided with a square or circular battery compartment to accommodate the above-mentioned battery. However, in some electronic devices, after the other electronic components of the electronic device are reasonably arranged, the battery compartment can be in the form of an L shape, which includes a first cavity and a second cavity arranged against each other. At this time, although the square or circular battery can be accommodated in the battery compartment by adjusting the size specification, it can only be accommodated in one of the above-mentioned first cavity and second cavity, thereby causing waste of space utilization of the battery compartment. SUMMARY

[0004] Embodiments of the present application aim to provide a battery and an electronic device to improve the current situation that the battery cannot make good use of the L-shaped battery compartment in the above-mentioned electronic device and to improve the safety performance.

[0005] In a first aspect, embodiments of the present application adopt the following technical solutions to solve the technical problems, which specifically include:

[0006] A battery includes a shell, an electrode assembly, and a tab. The shell includes a first end wall, a second end wall, and a connecting wall portion. The first end wall and the second end wall are both in the form of an L shape and are arranged in a spaced manner along the thickness direction of the battery. The connecting wall portion extends from the edge of the first end wall to the second end wall and encloses an L-shaped accommodation cavity; the first end wall is arranged as one end of the accommodation cavity, and the second end wall is arranged as the other end of the accommodation cavity. The connecting wall portion includes a plurality of wall portion units, which are arranged in sequence along the edge contour of the first end wall. The electrode assembly is in the form of an L shape and includes an anode tab, a cathode tab, and a separator. The anode tab and the cathode tab are alternately stacked along the thickness direction, the edge of the anode tab surrounds the projection of the cathode tab on the anode tab, and the separator is arranged between the anode tab and the cathode tab. Among the plurality of wall portion units, there is a preset wall portion unit, and the side edge of the anode tab arranged opposite to the preset wall portion unit has a first distance from the preset wall portion unit, and the distance of the side edge of the anode tab beyond the cathode tab is a second distance. The ratio of the first distance to the second distance corresponding to the same preset wall portion unit is between 1 / 5 and 1 / 2, and the second distance is between 0.7 mm and 1.5 mm.

[0007] The shell of the battery provided by the embodiments of the present application is in an L shape as a whole, and therefore when applied to an electronic device having an L-shaped battery compartment, the two parts of the battery provided by the embodiments of the present application that are opposite to each other and are bent can be respectively filled in the two cavities of the L-shaped battery compartment, so that the L-shaped battery compartment can be better utilized. That is, the battery provided by the embodiments of the present application can improve the current situation that the battery cannot be well utilized in the L-shaped battery compartment of the electronic device.

[0008] In some embodiments, the connecting wall portion includes a first wall unit, a second wall unit, a third wall unit, a fourth wall unit, a fifth wall unit and a sixth wall unit. The first wall unit, the second wall unit and the third wall unit all extend along a first direction, and are sequentially and spaced apart along a second direction. The third wall unit has a length extending along the first direction that is greater than the lengths of the first wall unit and the second wall unit extending along the first direction. The tab extends out of the shell from the first wall unit. The first direction and the second direction are both perpendicular to the thickness direction, and the first direction intersects the second direction. The fourth wall unit, the fifth wall unit and the sixth wall unit all extend along the second direction, and are sequentially and spaced apart along the first direction. The sixth wall unit has a length extending along the second direction that is greater than the lengths of the fourth wall unit and the fifth wall unit extending along the second direction.

[0009] As a further improvement of the above-mentioned scheme, at least one of the second wall unit, the third wall unit, the fourth wall unit, the fifth wall unit or the sixth wall unit is a preset wall unit.

[0010] In some embodiments, the shell further includes a sealing portion extending out of the connecting wall portion, at least part of the sealing portion is bent to extend towards the first end wall, and the sealing portion includes a second side wall unit and a third side wall unit. The second side wall unit extends out of the second wall unit and extends towards the first end wall. The third side wall unit extends out of the third wall unit and extends towards the first end wall.

[0011] In some embodiments, the anode tab has a second side edge opposite to the second wall unit, the distance between the second side edge and the outer surface of the second side wall unit is G2, the distance between the second side edge and the cathode tab is D2, and 1 / 3≤G2 / D2≤4 / 5, where 0.7mm≤D2≤1.5mm; and / or, the anode tab has a third side edge opposite to the third wall unit, the distance between the third side edge and the outer surface of the third side wall unit is G3, the distance between the third side edge and the cathode tab is D3, and 1 / 3≤G3 / D3≤4 / 5, where 0.7mm≤D3≤1.5mm.

[0012] In some embodiments, the sealing portion further comprises a fourth side wall unit and a sixth side wall unit. The fourth side wall unit extends from the fourth wall unit and extends towards the first end wall; the sixth side wall unit extends from the sixth wall unit and extends towards the first end wall.

[0013] In some embodiments, the anode tab has a fourth side edge opposite to the fourth wall unit, a distance between the fourth side edge and an outer surface of the fourth side wall unit is G4, a distance between the fourth side edge and the cathode tab is D4, and 1 / 3≤G4 / D4≤4 / 5, wherein 0.7mm≤D4≤1.5mm; and / or, the anode tab has a sixth side edge opposite to the sixth wall unit, a distance between the sixth side edge and an outer surface of the sixth side wall unit is G6, a distance between the sixth side edge and the cathode tab is D6, and 1 / 3≤G6 / D6≤4 / 5, wherein 0.7mm≤D6≤1.5mm.

[0014] In some embodiments, the sealing portion further comprises a first arc-shaped side wall unit, the second side wall unit and the fourth side wall unit are connected by the first arc-shaped side wall unit, a radius R1 of the first arc-shaped side wall unit satisfies: 0.85(G2+D2)≤R1≤1.0(G2+D2), the second side edge and the fourth side edge are connected by a first arc-shaped portion; and / or, the sealing portion further comprises a second arc-shaped side wall unit, the third side wall unit and the fourth side wall unit are connected by the second arc-shaped side wall unit, a radius R2 of the second arc-shaped side wall unit satisfies: 0.85(G3+D3)≤R2≤1.0(G3+D3), the anode tab has a third side edge opposite to the third wall unit, the third side edge and the fourth side edge are connected by a second arc-shaped portion; and / or, the sealing portion further comprises a third arc-shaped side wall unit, the third side wall unit and the sixth side wall unit are connected by the third arc-shaped side wall unit, a radius R3 of the third arc-shaped side wall unit satisfies: 0.85(G3+D3)≤R3≤1.0(G3+D3), the third side edge and the sixth side edge are connected by a third arc-shaped portion.

[0015] In some embodiments, a first distance between the second side edge and the second wall unit is L2, a thickness T of the connecting wall satisfies: 1 / 7≤T / L2≤1 / 3; and / or, 1 / 25≤T / G2≤3 / 10.

[0016] In some embodiments, a part of the sealing portion bent to extend towards the first end wall is fixed to the connecting wall by bonding.

[0017] In the second aspect, the embodiments of the present application further adopt the following technical solutions to solve the technical problem, and the scheme specifically comprises:

[0018] An electronic device comprises the above battery. BRIEF DESCRIPTION OF DRAWINGS

[0019] One or more embodiments are illustrated by way of example in the figures that are not intended to be limiting of the embodiments so as to illustrate exemplary principles of the embodiments. The same reference numerals in different drawings represent the same element, and embodiments of the present application can be used in conjunction with elements of the other embodiments. Like numbers refer to like elements throughout. It will be appreciated that elements on any one drawing can be employed in combination with elements of another drawing.

[0020] Figure 1 A front view of a battery according to one embodiment of the present application;

[0021] Figure 2 A front view of a battery according to one embodiment of the present application; Figure 1 A bottom view of a battery according to one embodiment of the present application;

[0022] Figure 3 A front view of a battery according to one embodiment of the present application; Figure 1 A cross-sectional view of a battery according to one embodiment of the present application along line A-A;

[0023] Figure 4 A front view of a battery according to one embodiment of the present application; Figure 1 A cross-sectional view of a battery according to one embodiment of the present application along line B-B;

[0024] Figure 5 A front view of a battery according to one embodiment of the present application; Figure 2 A cross-sectional view of a battery according to one embodiment of the present application along line C-C;

[0025] Figure 6 A front view of a battery according to one embodiment of the present application;

[0026] Figure 7 A front view of a battery according to one embodiment of the present application;

[0027] Figure 8 A front view of a battery according to one embodiment of the present application;

[0028] Figure 9 A schematic view of an electronic device according to one embodiment of the present application.

[0029] In the drawings:

[0030] 1. A battery;

[0031] 100. A housing; 110. A first end wall; 120. A second end wall; 130. A connecting wall portion; 140. A sealing portion; 131. A first wall portion unit; 132. A second wall portion unit; 133. A third wall portion unit; 134. A fourth wall portion unit; 135. A fifth wall portion unit; 136. A sixth wall portion unit; 137. A seventh wall portion unit; 139. A wall portion unit; 141. A first side wall unit; 142. A second side wall unit; 143. A third side wall unit; 144. A fourth side wall unit; 145. A fifth side wall unit; 146. A sixth side wall unit; 147. A first arc-shaped side wall unit; 148. A second arc-shaped side wall unit; 149. A third arc-shaped side wall unit; 101. A receiving cavity;

[0032] 200, electrode assembly; 210, anode tab; 220, cathode tab; 230, separator membrane; 211, first side edge; 212, second side edge; 213, third side edge; 214, fourth side edge; 215, fifth side edge; 216, sixth side edge; 217, seventh side edge; 218a, first arc-shaped portion; 218b, second arc-shaped portion; 218c, third arc-shaped portion; 231, separator membrane unit;

[0033] 300, tab;

[0034] 2, electronic device. DETAILED DESCRIPTION

[0035] For the purpose of facilitating the understanding of the present application, the present application will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" / "connected to" / "mounted to" another element, it can be directly on the other element or one or more intervening elements can be present therebetween. When an element is described as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements can be present therebetween. The terms "vertical", "horizontal", "left", "right", "inner", "outer" and similar expressions used in the present specification are for the purpose of illustration only.

[0036] Unless otherwise defined, all technical and scientific terms used in the present specification are the same as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the present specification includes any and all combinations of one or more related listed items.

[0037] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0038] In the present specification, the "mounting" includes welding, screwing, clamping, bonding and the like to fix or limit an element or device to a specific position or place, and the element or device can be kept stationary or movable within a limited range at the specific position or place. The element or device fixed or limited to the specific position or place can be disassembled or can not be disassembled, which is not limited in the embodiments of the present application.

[0039] Please refer to Figures 1 to 4The diagram shows a front view, a bottom view, a cross-sectional view along line AA, and a cross-sectional view along line BB of a battery 1 provided in one embodiment of this application. The battery 1 includes a housing 100, an electrode assembly 200, and tabs 300. The housing 100 has a receiving cavity 101, in which the electrode assembly 200 is received. The tabs 300 are connected to the electrode assembly 200, with one end extending out of the housing 100. The specific structures of the housing 100, the electrode assembly 200, and the tabs 300 will be described next.

[0040] For details regarding the aforementioned housing 100, please refer to [link / reference needed]. Figure 3 At the same time, combined Figure 1 and Figure 2 The housing 100 includes a first end wall 110, a second end wall 120, and a connecting wall portion 130. Both the first end wall 110 and the second end wall 120 are L-shaped and are spaced apart from each other along the thickness direction Z of the battery 1 shown in the figure. The connecting wall portion 130 extends from the edge of the first end wall 110 towards the second end wall 120, and the connecting wall portion 130 itself forms an L-shaped receiving cavity 101; the first end wall 110 forms one end of the receiving cavity 101, and the second end wall 120 forms the other end of the receiving cavity 101.

[0041] Please refer to the following for details. Figure 1In combination with other figures, the connecting wall portion 130 comprises a plurality of wall units 139, each of which is arranged along the edge contour of the first end wall 110 in sequence. Specifically, as viewed along the thickness direction Z, the plurality of wall units 139 specifically comprises a first wall unit 131, a second wall unit 132, and a third wall unit 133, each of which extends along the illustrated first direction X, and a fourth wall unit 134, a fifth wall unit 135, and a sixth wall unit 136, each of which extends along the illustrated second direction Y. The first wall unit 131 is a wall unit through which the tab 300 extends. The first wall unit 131, the second wall unit 132, and the third wall unit 133 are arranged in sequence along the illustrated second direction Y, and the third wall unit 133 has a length extending along the first direction X that is greater than the lengths of the first wall unit 131 and the second wall unit 132 extending along the first direction X; that is, as viewed along the thickness direction Z, the third wall unit 133 determines one of the long side or the wide side of the battery 1. The fourth wall unit 134, the fifth wall unit 135, and the sixth wall unit 136 are arranged in sequence along the first direction X; among them, the fourth wall unit 134 is located between the second wall unit 132 and the third wall unit 133, the fifth wall unit 135 is located between the first wall unit 131 and the second wall unit 132, and the sixth wall unit 136 is located between the first wall unit 131 and the third wall unit 133. The sixth wall unit 136 has a length extending along the second direction Y that is greater than the lengths of the fourth wall unit 134 and the fifth wall unit 135 extending along the second direction Y; that is, as viewed along the thickness direction Z, the sixth wall unit 136 determines the other of the long side or the wide side of the battery 1. It is worth mentioning that in the present embodiment, any two of the first direction X, the second direction Y, and the thickness direction Z are perpendicular to each other; however, the present application is not limited thereto, as long as the first direction X and the second direction Y are both perpendicular to the thickness direction Z, and the first direction X and the second direction Y intersect each other.

[0042] More preferably, in addition to the first to sixth wall units, the connecting wall 130 of the present embodiment further comprises a seventh wall unit 137 which is arc-shaped. Specifically, the seventh wall unit 137 is connected between the second wall unit 132 and the fifth wall unit 135, and is concave towards the accommodating cavity 101. The provision of the seventh wall unit 137 can facilitate the positioning and installation of the battery 1 in the electronic device. In addition, the concave arc-shape of the seventh wall unit 137 can avoid the straight angle transition between the second wall unit 132 and the fifth wall unit 135, thereby improving the tensile resistance of the battery 1 at this position to a certain extent. Specifically, in other embodiments, the second wall unit 132 and the fifth wall unit 135 can be connected through a straight angle transition. In comparison, the present embodiment provides the seventh wall unit 137, thereby relatively increasing the size of the connecting wall 130 at this position on the basis of not increasing the volume of the battery 1. Therefore, even if the battery 1 is subjected to a bending force or a twisting force in the thickness direction Z as shown, the seventh wall unit 137 can alleviate the tensile force and the degree of deformation received by the second wall unit 132 and the fifth wall unit 135. In addition, the obtuse angle connection between the seventh wall unit 137 and the second wall unit 132 (and the fifth wall unit 135) also avoids the disadvantage of causing a large stress at this position due to the sharp straight angle transition of the second wall unit 132. Of course, in other embodiments of the present application, the seventh wall unit 137 can also be omitted. Figure 1

[0043] Please refer to Figure 5 which shows Figure 2 ​The middle battery 1 is cut along the C-C line. In this embodiment, the battery 1 is a soft-pack battery. Accordingly, the shell 100 further comprises a sealing portion 140, which is a part of the shell 100 that is sealed after the electrode assembly 200 is received. Specifically, the sealing portion 140 extends from one end of the connecting wall portion 130 close to the second end wall 120, and is at least partially bent towards the first end wall 110 to reduce the overall volume of the battery 1, and to form a side wall of the battery 1 together with the connecting wall portion 130, thereby reducing the risk of the battery 1 being punctured on the side wall. It should be understood that in other embodiments of the present application, the sealing portion 140 can also extend from the middle region of the connecting wall portion 130, and be at least partially bent towards the first end wall 110. Figure 3 More specifically, the sealing portion 140 comprises a first side wall unit 141, a second side wall unit 142, a third side wall unit 143, a fourth side wall unit 144, a fifth side wall unit 145, and a sixth side wall unit 146. The first side wall unit 141 extends from the outer surface of the first wall portion unit 131 away from the receiving cavity 101, and holds the tab 300. The second side wall unit 142 extends from the outer surface of the second wall portion unit 132 and extends towards the first end wall 110. The third side wall unit 143 extends from the outer surface of the third wall portion unit 133 and extends towards the first end wall 110. The fourth side wall unit 144 extends from the outer surface of the fourth wall portion unit 134 and extends towards the first end wall 110. The fifth side wall unit 145 extends from the outer surface of the fifth wall portion unit 135 and extends towards the first end wall 110. The sixth side wall unit 146 extends from the outer surface of the sixth wall portion unit 136 and extends towards the first end wall 110. That is, the part of the sealing portion 140 other than the first side wall unit 141 extends from the connecting wall portion 130 and is bent towards the first end wall 110. In this embodiment, the part of the sealing portion 140 that is bent towards the first end wall 110 is adhesively fixed to the connecting wall portion 130 to form a side wall of the battery 1 together with the connecting wall portion 130. The way in which the sealing portion 140 is adhesively fixed can be by dispensing, spraying, or by pasting adhesive tape on the sealing portion 140 and / or the connecting wall portion 130. In this embodiment, the sealing portion 140 can be a single layer as shown, or can be folded into two layers or more at the end away from the second end wall 120, and adhesively fixed to the connecting wall portion 130.

[0044] It should be noted that the connecting wall portion 120 does not always extend in the thickness direction Z as shown. Please refer to Figure 3, which is continuously bent at one end close to the second end wall 120. Specifically, in the present embodiment, the shell 100 comprises two composite sheets, which specifically comprise a polymer material layer, a metal material layer, and a protective layer arranged in sequence. For the convenience of description, the two composite sheets are defined as a first composite sheet and a second composite sheet below. The middle region of the first composite sheet is recessed to form a cavity portion with a cavity, and the edge region of the first composite sheet is arranged around the cavity to form a flange portion. Optionally, the cavity portion of the first composite sheet is formed by stamping. The edge of the second composite sheet is attached to the flange portion and is fixed by hot melting to form a sealing region. Part of the sealing region is bent towards the cavity portion, thereby obtaining the shell 100 described above. The first end wall 110 comprises the bottom wall of the cavity portion of the first composite sheet, the second end wall 120 comprises the part of the second composite sheet arranged opposite to the bottom wall, the connecting wall portion 130 comprises the side wall of the cavity portion of the first composite sheet, the part of the second composite sheet close to the sealing region and not hot-melted, and the part of the sealing region close to the side wall of the cavity portion, for example, the 2mm region range of the sealing region close to the cavity portion, and the sealing portion comprises the other region in the sealing region. The selection of the composite sheet is diverse, for example, in some embodiments, the metal material layer comprises an aluminum foil or a steel foil, the protective layer can comprise polyethylene terephthalate, and the polymer material layer can comprise polyethylene and / or polypropylene. The structure of the composite sheet is not specifically limited in the present application.

[0045] It should be understood that even though the shell 100 in the present embodiment is composed of two composite sheets, in other embodiments, the shell 100 can also be composed of a single composite sheet. For example, please refer to Figure 6 which shows a schematic diagram of a battery 1b provided by another embodiment of the present application. Unlike the battery 1 described above, the first composite sheet and the second composite sheet of the shell of the battery 1b are bent and formed from the same sheet, which is specifically integrally connected at the second end wall and the third wall portion unit 133, rather than being fixed by hot melting of the sheet; that is, the shell does not have a sealing portion at the third wall portion unit 133. For another example, please refer to Figure 7 which shows a schematic diagram of a battery 1c provided by still another embodiment of the present application. Unlike the battery 1 described above, the first composite sheet and the second composite sheet of the shell of the battery 1c are bent and formed from the same sheet, which is specifically integrally connected at the second end wall and the fourth wall portion unit, rather than being fixed by hot melting of the sheet, that is, the shell does not have a sealing portion at the fourth wall portion unit. For another example, please refer to Figure 8Fig. 1d shows a schematic view of a battery 1d according to another embodiment of the present application. The battery 1d differs from the battery 1 described above in that the first composite sheet and the second composite sheet of the housing of the battery 1d are formed by bending a same sheet, and specifically, the second end wall and the sixth wall unit are integrally connected, rather than being fixed by heat melting of the sheet, i.e., no sealing part is provided at the sixth wall unit.

[0046] For the electrode assembly 200 described above, please continue to refer to Figures 3 to 5 In combination with other drawings, the electrode assembly 200 includes anode tabs 210, cathode tabs 220, and separator membranes 230. The anode tabs 210 and the cathode tabs 220 are both L-shaped. The electrode assembly 200 includes the anode tabs 210 and the cathode tabs 220, and each anode tab 210 and each cathode tab 220 are alternately stacked along the thickness direction Z. The size of the anode tab 210 is slightly larger than the size of the cathode tab 220, and the edge profile of the anode tab 210 exceeds the edge profile of the adjacent cathode tab 220; that is, in the stacked state, the projection of the cathode tab 220 on the anode tab 210 is surrounded by the anode tab 210 to reduce the risk of lithium precipitation. The separator membranes 230 are provided between adjacent anode tabs 210 and cathode tabs 220. In this embodiment, the electrode assembly 200 includes a plurality of anode tabs 210 and a plurality of cathode tabs 220, and the separator membranes 230 are continuously Z-shaped and form a plurality of separator membrane units 231 that are sequentially and spaced apart along the thickness direction Z. Each separator membrane unit 231 separates adjacent anode tabs 210 and cathode tabs 220. Of course, in other embodiments of the present application, the separator membranes 230 can not be continuously bent, but can be flat and thin. At this time, a separator membrane 230 is provided between each adjacent anode tab 210 and cathode tab 220.

[0047] The anode tab 210 includes a first side edge 211, a second side edge 212, a third side edge 213, a fourth side edge 214, a fifth side edge 215, a sixth side edge 216, and a seventh side edge 217, which correspond to the first wall unit 131, the second wall unit 132, the third wall unit 133, the fourth wall unit 134, the fifth wall unit 135, the sixth wall unit 136, and the seventh wall unit 137, respectively. The seventh side edge 217 is concave relative to the second side edge 212 and the fifth side edge 215 adjacent to the seventh wall unit 137. In this embodiment, the seventh side edge 217 is concave in an arc shape. Similarly, the provision of the seventh side edge can improve the tensile and bending resistance of the anode tab 210.

[0048] For the tab 300 described above, please refer to Figure 5 In combination with Figure 1The whole of the battery 1 is in a flat rectangular shape, one end of the tab 300 is connected with the electrode assembly 200, and the other end extends out of the shell 100 through the first wall unit 131. In this embodiment, the battery 1 includes two tabs 300, which are the first tab 300a and the second tab 300b, respectively; the first tab 300a is connected with each anode tab 210, and the second tab 300b is connected with each cathode tab 220. Specifically, the first tab 300a includes a first conductive part and a second conductive part. The first conductive part includes a plurality of first conductive pieces, which are formed by extending from the edge of the anode tab 210; each first conductive piece is stacked and fixedly connected by welding to form the first conductive part. The second end of the second conductive part is connected with the first conductive part, and the second end extends out of the shell 100; the second end of the second conductive part is the end of the tab 300 extending out of the shell 100 mentioned above. Similarly, the second tab 300b includes a third conductive part and a fourth conductive part. The third conductive part includes a plurality of second conductive pieces, which are formed by extending from the edge of the cathode tab 220; each second conductive piece is stacked and fixedly connected by welding to form the third conductive part. The second end of the fourth conductive part is connected with the third conductive part, and the second end extends out of the shell 100; the second end of the fourth conductive part is the end of the tab 300 extending out of the shell 100 mentioned above.

[0049] During the transportation or use of the battery, it is inevitable to fall or collide with other objects, especially in extreme cases, the electrode assembly 200 may be broken into two parts in a certain direction under sudden impact, and the two parts may move away in the opposite direction and extrude the side wall of the shell 100 outward under the remaining impact energy, thereby piercing the shell 100; or causing the risk of short circuit due to the piercing of the diaphragm. Therefore, battery manufacturers will test the battery before it leaves the factory, which is commonly known as impact testing in the industry. Generally, impact testing includes two kinds of fracture tests simulating the fracture of the electrode assembly 200 into two parts in the first direction X and the fracture into two parts in the second direction Y. Next, taking the test of the fracture of the electrode assembly 200 into two parts in the second direction Y as an example, the test method specifically includes the following steps:

[0050] S1: Place the test round bar. Specifically, place a round bar at a predetermined height above the battery 1 and place it to extend in the first direction X, while ensuring that the round bar is located between the second wall unit 132 and the third wall unit 133 when viewed in the thickness direction.

[0051] S2: Release the round bar to fall on the battery 1, so that the battery 1 is subjected to an impact force.

[0052] S3: repeat the above steps S1-S2 to observe whether the battery 1 passes the test. The condition for passing the test is that the shell 100 of the battery 1 has not been punctured and the electrode assembly 200 of the battery 1 has not been short-circuited after repeating the above steps S1-S2 for a set number of times. That is, if the shell of the battery 1 has been punctured or the electrode assembly 200 has been short-circuited before the set number of times of repeating the above steps is completed, the battery 1 fails the test and the test is immediately stopped.

[0053] S4: test 20 batteries using the above step S3 and record the number of batteries that pass the test.

[0054] For the convenience of explanation and understanding, the distance between any one of the above first to sixth side edges and the outer surface of the opposite wall unit is defined as the first spacing L n (n≥1). The distance of any one of the above first to sixth side edges beyond the cathode tab is defined as the second spacing D n (n≥1). The distance between any one of the above first to sixth side edges and the outer surface of the opposite side wall unit is defined as the third spacing G n (n≥1). Regarding the first spacing L n , the second spacing D n , and the third spacing G n The measurement method during the experiment can be taking a CT scan, measuring in the CT scan, and converting to the actual size.

[0055] First, the inventors tested different combinations between the first spacing L2 and the second spacing D2 to observe the test results; the first spacing L2 is the distance between the second side edge 212 and the outer surface of the second wall unit 132, and the second spacing D2 is the distance of the second side edge 212 beyond the cathode tab 220. To obtain more obvious test results and speed up the test process, the first spacing L3 is consistent with the first spacing L2, and the second spacing D3 is consistent with the second spacing D2; the first spacing L3 is the distance between the third side edge 213 and the outer surface of the third wall unit 133, and the second spacing D3 is the distance of the third side edge 213 beyond the cathode tab 220.

[0056] Table 1 shows the influence of different combinations of the first distance L2 and the second distance D2, and different combinations of the first distance L3 and the second distance D3 on the battery anti-collision performance. From the data in Table 1 and in combination with the experimental method of the control variable, if the second distance D2 and the second distance D3 are regarded as constant values, i.e., the second distance D2 and the second distance D3 are regarded as irrelevant variables, and the first distance L2 and the first distance L3 are regarded as independent variables, and in combination with the observation of different groups, it can be seen that when the ratio between the first distance L2 and the second distance D2 is between 1 / 5 and 1 / 2, the number of battery 1 tested is significantly more, i.e., the anti-collision performance of the battery 1 is better. Specifically, when L2 / D2<1 / 5, after the test round rod falls on the battery 1, the electrode assembly 200 is at least partially broken into two parts relatively along the second direction Y, the two parts move back along the second direction Y and pierce the second wall unit 132 and the third wall unit 133 in a short time. When L2 / D2>1 / 2, after the test round rod falls on the battery 1, the electrode assembly 200 is at least partially broken into two parts, the two parts move back along the second direction Y, and since L2(or L3) is larger, the probability of piercing the shell 100 is relatively smaller than the former case; but in the process of moving back of the above two parts to contact the corresponding wall unit, the anode tab 210 and the cathode tab 220 may be wrinkled and pierce the separator 230 due to relative movement, thereby causing short circuit of the battery 1. In comparison, when 1 / 5≤L2 / D2≤1 / 2, the probability of the above two cases is low, and therefore the anti-collision performance of the battery 1 configured in this way is better.

[0057] If the ratio between the first distance L2 and the second distance D2 is regarded as a constant value, and the second distance D2 is regarded as an independent variable, when the size of the second distance D2 is between 0.7mm and 1.5mm, the number of batteries 1 passing the test is obviously more; that is, the anti-collision performance of the battery 1 is better at this time. Specifically, when D2<0.5mm, the time difference of the anode tab 210 and the cathode tab 220 contacting the second wall unit 132 (or the third wall unit 133) is very short, which means that the second wall unit 132 (or the third wall unit 133) is basically impacted by the anode tab 210 and the cathode tab 220 at the same time, and the risk of being pierced is higher, so the number of batteries passing the test is less. When D2>1.5mm, the distance difference between the edges of the anode tab 210 and the cathode tab 220 is larger; that is, before the cathode tab 220 contacts the second wall unit 132 (or the third wall unit 133), the movement time of the cathode tab 220 is longer, which increases the risk of the anode tab 210 and the cathode tab 220 wrinkling and piercing the separator 230, and further causing a short circuit, so the number of batteries 1 passing the test is also less. In contrast, when 0.5mm<D2<1.5mm, the time difference of the anode tab 210 and the cathode tab 220 contacting the second wall unit 132 (or the third wall unit 133) is longer, and at the same time, it can also limit the movement of the cathode tab 220 to the second wall unit 132 (or the third wall unit 133) to a certain extent. The process time is shorter; therefore, the anti-collision performance of the battery 1 configured in this way is better.

[0058] In summary, when the second distance is between 0.7mm and 1.5mm, and the ratio of the first distance to the second distance is between 1 / 5 and 1 / 2, the anti-collision performance of the battery 1 is excellent.

[0059] Table 1, the influence of different combinations of the first distance L2 and the second distance D2, the first distance L3 and the second distance D3 on the anti-collision performance of the battery

[0060]

[0061] Since the present embodiment is to make Figure 5 The part of the battery 1 between the second wall unit 132 and the third wall unit 133 shown in the figure is set according to the above size range and proportion range on both sides along the second direction Y, thereby achieving better effects. It is easy to understand on this basis that in some other embodiments of the present application, the above part can also be set according to the above size proportion range on one side along the second direction Y.

[0062] In addition, the electrode assembly 200 also has a part along Figure 5The first direction X is divided into two parts, which further causes the fourth wall unit 134 and the sixth wall unit 136 of the shell 100 to be pierced; therefore, according to the test results, the relationship between the first distance L4 and the second distance D4 and the relationship between the first distance L6 and the second distance D6 in the embodiment are also set with reference to the above-mentioned size range and numerical ratio. The first distance L4 is the distance between the fourth side 214 and the outer surface of the fourth wall unit 134, and the second distance D4 is the distance by which the fourth side 214 exceeds the cathode tab 220. The first distance L6 is the distance between the sixth side 216 and the outer surface of the sixth wall unit 136, and the sixth distance D6 is the distance by which the sixth side 216 exceeds the cathode tab 220. Specifically, the second distance D4 is between 0.7 mm and 1.5 mm, and the ratio of the first distance L4 to the second distance D4 is between 1 / 5 and 1 / 2; and / or, the second distance D6 is between 0.7 mm and 1.5 mm, and the ratio of the first distance L6 to the second distance D6 is between 1 / 5 and 1 / 2. Similarly, in some embodiments, the first wall unit 131 and the fifth wall unit 135 and the corresponding side of the anode tab 210 can also satisfy the above-mentioned relationship.

[0063] In summary, as long as the connecting wall portion 130 includes at least one preset wall unit, and the preset wall unit satisfies: the ratio of the first distance L' and the second distance D' corresponding to the same preset wall unit is between 1 / 5 and 1 / 2, and the second distance is between 0.7 mm and 1.5 mm, the battery 1 can obtain a better anti-collision effect. In this application, the "preset wall unit" in this application refers to one of the wall units in the connecting wall portion 130, and "the connecting wall portion includes at least one preset wall unit" refers to one or more of the wall units in the connecting wall portion 130 being a preset wall unit. In this application, any one of the first wall unit 131, the second wall unit 132, the third wall unit 133, the fourth wall unit 134, the fifth wall unit 135, and the sixth wall unit 136 can be the preset wall unit. When the first to sixth wall units are all preset wall units, the battery 1 has the best anti-collision effect. The "first distance" in this application refers to the distance between the side of the anode tab opposite the preset wall unit and the preset wall unit. For example, when the second wall unit is a preset wall unit, the first distance corresponding to the preset wall unit is the first distance L2. For another example, when the third wall unit 133 is a preset wall unit, the first distance corresponding to the preset wall unit is the first distance L3. The "second distance" in this application refers to the distance between the side of the anode tab opposite the preset wall unit and the cathode tab. For example, when the second wall unit is a preset wall unit, the second distance corresponding to the preset wall unit is the second distance D2. For another example, when the third wall unit 133 is a preset wall unit, the second distance corresponding to the preset wall unit is the second distance D3. Finally, it is worth noting that the "first distance and the second distance corresponding to the same preset wall unit" in this application refers to the first distance and the second distance corresponding to the side of the anode tab opposite the preset wall unit. For example, when only the second wall unit 132 is a preset wall unit, the first distance and the second distance corresponding to the same preset wall unit are the first distance and the second distance corresponding to the second side, i.e. the first distance L2 and the second distance D2. For another example, when the second wall unit 132 and the third wall unit 133 are both preset wall units, the first distance and the second distance corresponding to the same preset wall unit 132 are the matching first distance L2 and the second distance D3, and the matching first distance L3 and the second distance D3.

[0064] Preferably, to ensure that the first distance can provide sufficient buffer space, the thickness T of the shell 100 at the connecting wall portion 130 satisfies 1 / 7≤T / L'≤1 / 3 between the first distance L' described above; wherein L' can be any one of L1, L3, L4, L5 and L6. Wherein L1 is the distance between the first side edge 211 and the outer surface of the first wall unit 131, and L5 is the distance between the fifth side edge 215 and the outer surface of the fifth wall unit 135.

[0065] Since the connecting wall portion 130 and the sealing portion 140 covering it jointly constitute the side wall of the battery 1 in the height range covered by the sealing portion 140; that is to say, the sealing portion 140 will participate in the protection of the electrode assembly 200. Therefore, the inventors subsequently tested different combinations between the third distance G n (n≥2) and the second distance D n described above. Among them, the distance between the second side edge 212 and the outer surface of the second wall unit 142 is the third distance G2, the distance between the third side edge 213 and the outer surface of the third wall unit 143 is the third distance G3, the distance between the fourth side edge 214 and the outer surface of the fourth wall unit 144 is the fourth distance G4, the distance between the fifth side edge 215 and the outer surface of the fifth wall unit 145 is the fifth distance G5, and the distance between the sixth side edge 216 and the outer surface of the sixth wall unit 146 is the third distance G6.

[0066] Table II shows the influence of different combinations of the third distance G2 and the second distance D2, and different combinations of the third distance G3 and the second distance D3 on the battery anti-collision performance. From the data in Table II and in combination with the experimental method of the control variable, if the second distance D2 and the second distance D3 are regarded as constant values, i.e., the second distance D2 and the second distance D3 are regarded as irrelevant variables, the third distance G2 and the third distance G3 are regarded as independent variables; and in combination with the observation of different groups, when the ratio between the third distance G2 and the second distance D2 is between 1 / 3 and 4 / 5, the number of battery 1 tested is obviously more; that is, the anti-collision performance of the battery 1 is better. Specifically, when G2 / D2 < 1 / 3, after the test round rod falls on the battery 1, the electrode assembly 200 is at least partially broken into two parts relatively along the second direction Y, the two parts move back along the second direction Y and pierce the second side wall unit 142 and the third side wall unit 143 in a short time. When G2 / D2 > 4 / 5, after the test round rod falls on the battery 1, the electrode assembly 200 is at least partially broken into two parts, the two parts move back along the second direction Y, and since G2 is larger, the probability of piercing the shell 100 is relatively smaller than the former case; but the process time of the two parts moving back to contact the corresponding side wall unit is relatively long, and the anode tab 210 and the cathode tab 220 may be wrinkled and pierce the separator 230 due to relative movement in the process, thereby causing the battery 1 to short circuit. In comparison, when 1 / 3 ≤ G2 / D2 ≤ 4 / 5, the probability of the above two cases is low, and therefore the anti-collision performance of the battery 1 configured in this way is better.

[0067] If the ratio between the third distance G2 and the second distance D2 is regarded as a constant value, and the second distance D2 is regarded as an independent variable, when the size of the second distance D2 is between 0.7mm and 1.5mm, the number of batteries 1 passing the test is obviously more; that is, the anti-collision performance of the battery 1 is better at this time. Specifically, when D2<0.5mm, the time difference between the anode tab 210 and the cathode tab 220 contacting the second side wall unit 142 (or the third side wall unit 143) is very short, which means that the second side wall unit 142 (or the third side wall unit 143) is basically impacted by the anode tab 210 and the cathode tab 220 at the same time, and the risk of being pierced is higher, so the number of batteries passing the test is less. When D2>1.5mm, the distance difference between the edges of the anode tab 210 and the cathode tab 220 is larger; that is, before the cathode tab 220 contacts the second side wall unit 142 (or the third side wall unit 143), the movement time of the cathode tab 220 is longer, which increases the risk of the anode tab 210 and the cathode tab 220 wrinkling and piercing the separator 230, and further causing a short circuit, so the number of batteries 1 passing the test is also less. When 0.5mm<D2<1.5mm, compared with the case of D2<0.5mm, the time difference between the anode tab 210 and the cathode tab 220 contacting the second side wall unit 142 (or the third side wall unit 143) is relatively longer; at the same time, compared with the case of D2>1.5mm, the movement time of the cathode tab 220 to the second side wall unit 142 (or the third side wall unit 143) is relatively shorter; therefore, the anti-collision performance of the battery 1 configured as 0.5mm<D2<1.5mm is better.

[0068] In summary, when the second distance is between 0.7mm and 1.5mm, and the ratio of the third distance to the second distance is between 1 / 3 and 4 / 5, the anti-collision performance of the battery 1 is excellent.

[0069] Table II, the influence of different combinations of the third distance G2 and the second distance D2, and different combinations of the third distance G3 and the second distance D3 on the anti-collision performance of the battery

[0070]

[0071] Since the present embodiment is to make Figure 5 It is easy to understand that in some other embodiments of the present application, only one side of the above-mentioned part along the second direction Y can be set according to the above-mentioned size and proportion range.

[0072] In addition, the electrode assembly 200 also has Figure 5The first direction Y is broken into two parts, which further causes the fourth side wall unit 144 and the sixth side wall unit 146 of the shell 100 to be pierced; therefore, according to the test results described above, the relationship between the third distance G4 and the second distance D4 and the relationship between the third distance G6 and the second distance D6 in the present embodiment are also set with reference to the size range and numerical ratio described above. Specifically, the second distance D4 is between 0.7 mm and 1.5 mm, and the ratio of the third distance G4 to the second distance D4 is between 1 / 3 and 4 / 5; and / or, the third distance G6 is between 0.7 mm and 1.5 mm, and the ratio of the first distance L6 to the second distance D6 is between 1 / 3 and 4 / 5. Similarly, in some embodiments, the fifth wall unit 135 and the fifth side 215 can also satisfy the above relationship.

[0073] Preferably, to ensure that the third distance can provide sufficient buffer space, the thickness T of the connecting wall 130 of the shell 100 satisfies 1 / 25≤T / G2≤3 / 10 between the third distance G2; similarly, this setting is also applicable to other parts of the shell 100, that is, any one of G3, G4, G5 and G6 can be replaced by G2 in the relationship.

[0074] Further, to avoid the existence of large stress at the corner position of the battery 1 far from the tab 300 due to the sharp corner setting, and at the same time to make the battery 1 occupy a larger space and not convenient to install, the sealing part 140 further includes a first arc-shaped side wall unit 147, a second arc-shaped side wall unit 148 and a third arc-shaped side wall unit 149. Specifically, the second side wall unit 142 and the fourth side wall unit 144 are connected by the first arc-shaped side wall unit 147, the third side wall unit 143 and the fourth side wall unit 144 are connected by the second arc-shaped side wall unit 148, and the third side wall unit 143 and the sixth side wall unit 146 are connected by the third arc-shaped side wall unit 149. The setting of the first arc-shaped side wall unit 147, the second arc-shaped side wall unit 148 and the third arc-shaped side wall unit 149 makes the size of the battery 1 at the three corner positions shrink, which can reduce the occurrence of interference during installation; at the same time, the stress of the arc-shaped structure is smaller than that of the sharp corner, so the setting can also improve the mechanical properties of the battery 1 locally.

[0075] Further, the second side edge 212 and the fourth side edge 214 of the anode tab 210 are transitioned by a first arc-shaped portion 218a; the third side edge 213 and the fourth side edge 214 of the anode tab 210 are transitioned by a second arc-shaped portion 218b; and the third side edge 213 and the sixth side edge 216 of the anode tab 210 are transitioned by a third arc-shaped portion 218c. The provision of the first to third arc-shaped side wall units causes the gap between the anode tab 210 and the sealing portion 140 to be reduced, and the provision of the first arc-shaped portion 218a, the second arc-shaped portion 218b and the third arc-shaped portion 218c aims to increase the gap to some extent on this basis, thereby reducing the risk that the electrode assembly 200 more easily pierces the connecting wall portion 130 and the sealing portion 140 when the battery 1 is impacted.

[0076] Next, the inventors introduced the arc-shaped side wall unit variable into each group of tests based on the above-mentioned Table II test method, and Table III shows the influence of different combinations of the third spacing G2 and the second spacing D2, different combinations of the third spacing G3 and the second spacing D3, and the radii of the arc-shaped side wall units on the battery impact resistance performance. In this test, the radii of the first arc-shaped side wall unit 147, the second arc-shaped side wall unit 148 and the third arc-shaped side wall unit 149 of the same embodiment are the same size. It is worth mentioning that the measurement method of the radius of the arc is measured by a three-dimensional profile measuring instrument on the outer surface of the first to third arc-shaped side wall units 149 in this application. Of course, other measuring tools such as R rules can also be used for measurement in other embodiments of the application.

[0077] From the data in Table III and the experimental method of the control variable, if the second spacing D2, the second spacing D3, the third spacing G2 and the third spacing G3 are considered as constant values, i.e. the second spacing and the third spacing are considered as independent variables, and the radius R of each arc-shaped side wall unit is considered as an independent variable, and different groups are observed, then when the ratio of the sum of the radius R and the third spacing G2 and the second spacing D2 is between 0.85 and 1.0, the number of batteries 1 tested is significantly more. That is, the impact resistance performance of the battery 1 is better at this time.

[0078] Table III, the influence of different combinations of the third spacing G2 and the second spacing D2, different combinations of the third spacing G3 and the second spacing D3, and different combinations of the radius R (the radius of the first arc-shaped side wall unit, the second arc-shaped side wall unit and the third arc-shaped side wall unit) on the battery impact resistance performance

[0079]

[0080]

[0081]

[0082]

[0083]

[0084]

[0085] It should be understood that even if the test in this test is an example of the second interval D2 and the second interval D3 size is the same, the third interval G2 and the third interval G3 size is the same, but in other embodiments of the application, the second interval D2 and the second interval D3, the third interval G2 and the third interval G3 can also be different, such as: 0.8≤G2 / G3<1 and 1<G2 / G3≤1.2; At this time, the radius of the fillet of each arc-shaped side wall unit satisfies: 0.85(G2+D2)≤R1≤1.0(G2+D2), 0.85(G3+D3)≤R2≤1.0(G3+D3), 0.85(G3+D3)≤R3≤1.0(G3+D3); Wherein, R1 is the radius of the outer surface of the first arc-shaped side wall unit 147, R2 is the radius of the outer surface of the second arc-shaped side wall unit 148, and R3 is the radius of the outer surface of the third arc-shaped side wall unit 149.

[0086] In summary, the battery 1 provided by the embodiments of the application includes a shell 100, an electrode assembly 200 and 300. Wherein, the shell 100 includes a first end wall 110 in L shape, a second end wall 120 in L shape, and a connecting wall part 130 extending from the first end wall 110 to the second end wall 120, that is, the shell 100 as a whole is in L shape. Therefore, when the battery 1 is applied to an electronic device with an L-shaped battery compartment, the two parts of the battery 1 bent relative to each other can be respectively filled in the two cavities of the L-shaped battery compartment, so as to better utilize the L-shaped battery compartment. That is, the battery provided by the embodiments of the application can improve the current situation that the battery cannot be well utilized in the L-shaped battery compartment of the above electronic device.

[0087] In addition, the connecting wall part 130 includes at least one preset wall part unit, and the ratio between the first distance corresponding to the preset wall part unit and the second distance is between 1 / 5 and 1 / 2, wherein the second distance is between 0.7mm and 1.5mm; The setting is conducive to strengthening the anti-collision performance of the battery 1.

[0088] Based on the same inventive concept, another embodiment of the application also provides an electronic device 2, please refer to Figure 9 which shows the schematic diagram of the electronic device 2, and combines Figures 1 to 4The electronic device 2 comprises the battery 1 in the above-mentioned embodiments. In this embodiment, the electronic device 2 is a mobile phone; it can be understood that in other embodiments of the application, the electronic device 2 can also be a tablet computer, a computer, a drone or other electronic devices that need to be driven by electricity.

[0089] The battery in the electronic device 2 can improve the current situation that the battery cannot be well used in the L-shaped battery compartment in the above-mentioned electronic device.

[0090] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; under the idea of the application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the application as described above, which are not provided in details for simplicity; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A battery comprising a case, an electrode assembly, and a tab electrically connected to the electrode assembly, characterized by, The shell comprises: a first end wall in an L shape; a second end wall in an L shape, which is spaced apart from the first end wall along a thickness direction of the battery; and a connecting wall portion extending from an edge of the first end wall to the second end wall and surrounding a receiving cavity in an L shape, the first end wall being arranged at one end of the receiving cavity, the second end wall being arranged at the other end of the receiving cavity, and the connecting wall portion comprising a plurality of wall portion units arranged in sequence along an edge profile of the first end wall. The electrode assembly is in an L shape and comprises anode and cathode electrode sheets and a separator film arranged between the anode and cathode electrode sheets, the anode and cathode electrode sheets being alternately stacked along the thickness direction, and an edge of the anode electrode sheet surrounding a projection of the cathode electrode sheet on the anode electrode sheet. The plurality of wall portion units comprises a preset wall portion unit, a first distance being present between a side of the anode electrode sheet arranged opposite the preset wall portion unit and the preset wall portion unit, and a second distance being present between the side of the anode electrode sheet arranged opposite the preset wall portion unit and the cathode electrode sheet, a ratio of the first distance to the second distance corresponding to the preset wall portion unit being in a range of 1 / 5 to 1 / 2, and the second distance being in a range of 0.7 mm to 1.5 mm.

2. The battery of claim 1, wherein, The plurality of wall portion units comprises a first wall portion unit, a second wall portion unit, a third wall portion unit, a fourth wall portion unit, a fifth wall portion unit, and a sixth wall portion unit. The first wall portion unit, the second wall portion unit, and the third wall portion unit are arranged in sequence along a first direction and spaced apart along a second direction, a length of the third wall portion unit extending along the first direction is greater than lengths of the first wall portion unit and the second wall portion unit extending along the first direction, and the tab extends out of the shell from the first wall portion unit, wherein the first direction and the second direction are both perpendicular to the thickness direction, and the first direction intersects the second direction. The fourth wall portion unit, the fifth wall portion unit, and the sixth wall portion unit are arranged in sequence along the second direction and spaced apart along the first direction, a length of the sixth wall portion unit extending along the second direction is greater than lengths of the fourth wall portion unit and the fifth wall portion unit extending along the second direction.

3. The battery of claim 2, wherein, At least one of the second wall portion unit, the third wall portion unit, the fourth wall portion unit, the fifth wall portion unit, or the sixth wall portion unit is the preset wall portion unit.

4. The battery of claim 2, wherein, The shell further comprises a sealing portion extending out of the connecting wall portion, at least a part of the sealing portion being arranged to extend towards the first end wall in a bent manner, and the sealing portion comprising: a second side wall unit extending out of the second wall portion unit and extending towards the first end wall; and a third side wall unit extending out of the third wall portion unit and extending towards the first end wall.

5. The battery according to claim 4, wherein The anode tab has a second side edge opposite to the second wall unit, a distance between the second side edge and an outer surface of the second side wall unit is G2, a distance between the second side edge and the cathode tab is D2, 1 / 3≤G2 / D2≤4 / 5, wherein 0.7mm≤D2≤1.5mm; and / or, The anode tab has a third side edge opposite to the third wall unit, a distance between the third side edge and an outer surface of the third side wall unit is G3, a distance between the third side edge and the cathode tab is D3, 1 / 3≤G3 / D3≤4 / 5, wherein 0.7mm≤D3≤1.5mm.

6. The battery of claim 5, wherein, The sealing part further comprises: A fourth side wall unit extending from the fourth wall unit and towards the first end wall; and A sixth side wall unit extending from the sixth wall unit and towards the first end wall.

7. The battery of claim 6, wherein, The anode tab has a fourth side edge opposite to the fourth wall unit, a distance between the fourth side edge and an outer surface of the fourth side wall unit is G4, a distance between the fourth side edge and the cathode tab is D4, 1 / 3≤G4 / D4≤4 / 5, wherein 0.7mm≤D4≤1.5mm; and / or, The anode tab has a sixth side edge opposite to the sixth wall unit, a distance between the sixth side edge and an outer surface of the sixth side wall unit is G6, a distance between the sixth side edge and the cathode tab is D6, 1 / 3≤G6 / D6≤4 / 5, wherein 0.7mm≤D6≤1.5mm.

8. The battery of claim 7, wherein, The sealing part further comprises a first arc-shaped side wall unit, the second side wall unit and the fourth side wall unit are connected by the first arc-shaped side wall unit, a radius R1 of the first arc-shaped side wall unit satisfies: 0.85(G2+D2)≤R1≤1.0(G2+D2), the second side edge and the fourth side edge are connected by a first arc-shaped part; and / or, The sealing part further comprises a second arc-shaped side wall unit, the third side wall unit and the fourth side wall unit are connected by the second arc-shaped side wall unit, a radius R2 of the second arc-shaped side wall unit satisfies: 0.85(G3+D3)≤R2≤1.0(G3+D3), the anode tab has a third side edge opposite to the third wall unit, the third side edge and the fourth side edge are connected by a second arc-shaped part; and / or, The sealing part further comprises a third arc-shaped side wall unit, the third side wall unit and the sixth side wall unit are connected by the third arc-shaped side wall unit, a radius R3 of the first arc-shaped side wall unit satisfies: 0.85(G3+D3)≤R3≤1.0(G3+D3), the third side edge and the sixth side edge are connected by a third arc-shaped part.

9. The battery of claim 7, wherein, A distance between the second side edge and the second wall unit is L2, a thickness T of the connecting wall satisfies: 1 / 7 ≤ T / L2 ≤ 1 / 3; and / or, 1 / 25 ≤ T / G2 ≤ 3 / 10.

10. The battery of claim 4, wherein, The portion of the seal portion bent to extend toward the first end wall is adhesively secured to the connection wall portion.

11. An electronic device, comprising: A battery comprising any of the features of claims 1 to 10.

Images