CN216054939U - Hard shell battery cell and power utilization device - Google Patents

Abstract

The embodiment of the application relates to the technical field of batteries and discloses a hard-shell battery cell and an electric device. The hard shell battery cell comprises a shell; the housing includes a base portion, a first end wall, and a second end wall. The base shell part is provided with an accommodating cavity which extends along the preset direction and is communicated with the base shell part. The first end wall cover accommodates one end of the cavity. The second end wall is the other end of the cover accommodating cavity. One of the base shell part and the second end wall is provided with a mounting cavity, the inner wall of the mounting cavity is provided with a first mounting surface, and the first mounting surface is obliquely arranged relative to the preset direction. The other one of the base shell part and the second end wall is installed in the installation cavity and is provided with a second installation surface, and the second installation surface is fixed on the first installation surface. The shell of the current hard shell battery cell can be reduced, and the risk that the assembly cannot be normally finished can be reduced.

Description

Hard shell battery cell and power utilization device

[ technical field ] A method for producing a semiconductor device

The embodiment of the application relates to the technical field of batteries, in particular to a hard shell battery cell and a power utilization device.

[ background of the invention ]

The battery cell is a device which converts external energy into electric energy and stores the electric energy in the battery cell so as to supply power to external equipment (such as portable electronic equipment) at a required moment. Currently, the battery cell is widely used in electronic products such as mobile phones, tablets, notebook computers and the like.

Generally, the battery cell is divided into a soft package battery cell and a hard shell battery cell. The hard shell battery cell comprises a shell, an electrode assembly, a tab and electrolyte filled in the shell. The shell comprises a base shell part, a first end wall and a second end wall. The base shell part is provided with a through containing cavity for containing the electrode assembly, the electrolyte and the part of the lug. The first end wall and the second end wall are used for plugging two ends of the accommodating cavity respectively. In some cell products: the first end wall is integrally formed with the base shell; the second end wall is formed with the base housing portion and is secured to the base housing portion by welding or adhesive bonding.

Currently, the second end wall is directly laid on the end of the base shell part and then fixed by welding or bonding and the like; however, this approach easily causes the second end wall to slide partially beyond the edge profile of the base portion during the fixing process, thereby resulting in failure of the case to properly complete the assembly.

[ Utility model ] content

The embodiment of the application aims at providing a hard-shell battery cell and a power utilization device so as to reduce the risk that the shell of the existing hard-shell battery cell cannot be assembled normally.

The embodiment of the application adopts the following technical scheme for solving the technical problems:

a hard-shell electrical core comprising a housing; the housing includes a base portion, a first end wall, and a second end wall. The base shell part is provided with an accommodating cavity which extends along the preset direction and is communicated with the base shell part. The first end wall covers one end of the accommodating cavity. The second end wall covers the other end of the accommodating cavity. One of the base shell part and the second end wall is provided with an installation cavity, the inner wall of the installation cavity is provided with a first installation surface, and the first installation surface is obliquely arranged relative to the preset direction. The other one of the base shell part and the second end wall is mounted in the mounting cavity and is provided with a second mounting surface, and the second mounting surface is fixed on the first mounting surface.

Compared with the hard shell battery cell on the market at present, in the hard shell battery cell provided by the embodiment of the application, one of the base shell part and the second end wall is provided with the mounting cavity, and the other one is mounted in the mounting cavity. In this manner, during assembly of the housing, the structure mounted to the mounting cavity (e.g., the second end wall) will not slip out of the contoured edge of the structure in which the mounting cavity is provided (e.g., the base portion) under the confines of the mounting cavity; that is, the hard-shell battery cell provided by the embodiment of the application can reduce the risk that the shell of the existing hard-shell battery cell cannot be assembled normally.

As a further improvement of the above technical solution, one end of the base housing facing the second end wall is recessed to form the mounting cavity, and the mounting cavity is communicated with the accommodating cavity and surrounds the accommodating cavity. The mounting cavity comprises a first cavity body, and the inner wall surface of the first cavity body comprises the first mounting surface.

As a further improvement of the above technical solution, the first mounting surface extends around the accommodating cavity to be closed. This arrangement is intended to enable the second end wall to be mounted to the mounting cavity at any angle about the axis of the first mounting surface without having to be rotated to a particular angle for mounting.

As a further improvement of the above technical solution, a cross-sectional profile of the first mounting surface gradually expands in a direction in which the first end wall is directed toward the second end wall.

As a further improvement of the above technical solution, the mounting cavity further includes a second cavity. One side of the first cavity, which faces away from the first end wall, extends to an end face of the base shell part to form the second cavity. The second end wall comprises a main body part and a filling part surrounding the side wall of the main body part, the filling part is formed by melting and flowing part of materials of the main body part to be arranged around the main body part, and the filling part is filled between the main body part and the side wall of the second cavity.

As a further improvement of the above technical solution, the second end wall and the base housing portion are fixed by welding or bonding.

As a further improvement of the above technical solution, the mounting cavity further includes a third cavity. The third cavity is arranged on one side, facing the first end wall, of the first cavity and communicated with the first cavity, and the first mounting surface surrounds the third cavity. Then, the excess fluid generated by the second end wall during welding will flow into the third cavity first, thereby reducing the risk of the fluid flowing directly into the receiving cavity.

As a further improvement of the above technical solution, the contour of the first mounting surface gradually shrinks in a direction in which the first end wall is directed toward the second end wall.

As a further improvement of the above technical solution, an included angle between the first mounting surface and the preset direction is between 10 ° and 80 °.

As a further improvement of the above technical solution, a side of the second end wall facing away from the first end wall is provided with an annular boss portion. The first mounting surface, the second mounting surface, and the boss portion have an overlapping area therebetween as viewed in a direction in which the second end wall is directed toward the first end wall. The second end wall and the base shell are fixed through ultrasonic welding. When the second end wall and the base shell part are welded, a probe of the ultrasonic welding device can be pressed on the boss part; the ultrasonic wave emitted from the ultrasonic welding device is concentrated on the boss portion and propagates through the boss portion toward the originally sharp portion of the second end wall, thereby forming the second mounting surface after welding. In contrast, if the boss portion is not provided, the probe of the ultrasonic welding apparatus is directly pressed against the surface of the second end wall, and the ultrasonic wave generated therefrom is easily diffused to other portions, and the energy that eventually reaches the sharp portion and melts the sharp portion is small, which leads to low welding efficiency.

As a further improvement of the above technical solution, the housing is an insulator. The material of the housing comprises plastic.

Another embodiment of the present application further provides an electrical device, including any one of the above hard shell cells.

[ description of the drawings ]

One or more embodiments are illustrated in drawings corresponding to, and not limiting to, the embodiments, in which elements having the same reference number designation may be represented as similar elements, unless specifically noted, the drawings in the figures are not to scale.

Fig. 1 is a schematic perspective view of a hard shell cell provided in an embodiment of the present application;

fig. 2 is a top view of the hard shell cell of fig. 1;

FIG. 3 is a cross-sectional view of the hard shell cell of FIG. 2 taken along line A-A;

FIG. 4 is a cross-sectional view of the hard shell cell of FIG. 2 taken along line B-B;

FIG. 5 is a sectional view at C of FIG. 3;

FIG. 6 is an enlarged, fragmentary illustration of a housing provided in accordance with another embodiment of the present application;

FIG. 7 is an enlarged, fragmentary illustration of a housing provided in accordance with yet another embodiment of the present application;

FIG. 8 is an enlarged partial view of FIG. 3 at D;

FIG. 9 is an enlarged partial schematic view at E in FIG. 4;

FIG. 10 is an enlarged partial schematic view at F of FIG. 4;

fig. 11 is a schematic view of an electric device according to an embodiment of the present disclosure.

In the figure:

1. a hard shell battery cell;

100. a housing; 110. a base portion; 120. a first end wall; 130. a second end wall; 131. a second mounting surface; 132. a boss portion; 101. an accommodating cavity; 102. a mounting cavity; 103. a first cavity; 1031. a first mounting surface; 104. a second cavity; 105. a third cavity; 106. a through hole; 107. an accommodating groove; 108. a communicating hole; 1071. a first groove; 1072. a second groove; 1081. a guide groove; 10811. a first sidewall unit; 10812. a second sidewall unit; 10813. a third sidewall unit; 10814. a fourth sidewall unit;

200. an electrode assembly;

300. a tab; 310. a first end; 320. a second end;

400. sealing glue; 410. a first glue layer; 420. a second adhesive layer;

100b, a housing; 110b, a base shell portion; 130b, a second end wall; 131b, a second mounting surface; 102b, an installation cavity; 1031b and a first mounting surface;

100c, a housing; 110c, a base shell portion; 130c, a second end wall; 102c, an installation cavity;

2. and (4) a power utilization device.

[ detailed description ] embodiments

In order to facilitate an understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is referred to as being "fixed to"/"mounted to" another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and the like as used herein are for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.

In this specification, the term "mount" includes welding, screwing, clipping, adhering, etc. to fix or restrict a certain element or device to a specific position or place, the element or device may be fixed or movable in a limited range in the specific position or place, and the element or device may be dismounted or not dismounted after being fixed or restricted to the specific position or place, which is not limited in the embodiment of the present application.

Referring to fig. 1 to 4, a perspective view, a top view, a sectional view of the hard shell battery cell 1 along a line a-a, and a sectional view of the hard shell battery cell 1 along a line B-B according to an embodiment of the present invention are respectively shown, where the hard shell battery cell 1 includes a casing 100, an electrode assembly 200, a tab 300, and a sealant 400. The casing 100 is a mounting base of the hard-shell battery cell 1, and is provided with a receiving cavity 101. The electrode assembly 200 is received in the receiving cavity 101. The first end 310 of the tab 300 is fixed to the electrode assembly 200, and the second end 320 of the tab 300 extends out of the case 100; accordingly, the case 100 is provided with a through hole 106 through which the tab 300 passes. The sealant 400 is disposed in the through hole 106 and blocks the through hole. Next, the above-described respective structures will be explained in order by taking the hard-shell battery cell 1 as a button battery cell as an example; it should be understood that in other embodiments of the present application, the hard shell cell 1 may also be a square cell, or other irregularly shaped cell.

Referring to fig. 3, the case 100 is provided with a receiving cavity 101 for receiving the electrode assembly 200, the tab 300 and the electrolyte, and the case 100 is further provided with a receiving cavity 101. In the present embodiment, the housing 100 is a substantially cylindrical structure, and includes a base portion 110, a first end wall 120, and a second end wall 130. Specifically, the base housing 110 has a cylindrical structure, and is provided with a receiving cavity 101 penetrating through the base housing 110 along a predetermined direction X shown in the figure. The first end wall 120 covers one end of the receiving cavity 101 and is fixed to the base 110. In this embodiment, the first end wall 120 is integrally formed with the base shell portion 110, for example, by injection molding; of course, in other embodiments of the present application, the first end wall 120 and the base portion 110 may be fixed by other methods such as adhesion, ultrasonic waves, and the like. The second end wall 130 is disposed opposite to the first end wall 120 and covers the other end of the receiving cavity 101. Alternatively, the second end wall 130 is fixed to the base portion 110 by means of ultrasonic welding; it is understood that in other embodiments of the present application, the second end wall 130 may be fixed to the base portion 110 by any practicable method, such as welding or bonding, and the present application is not limited thereto. As for the material of the case 100, it is made of an insulating material in the present embodiment; which is advantageous in preventing the pole pieces of both polarities of the electrode assembly 200 from being short-circuited through the case 100, and in preventing the tabs 300 extending through the case 100 from being short-circuited. Optionally, the material of the housing 100 comprises a plastic, for example, comprising at least one of the following materials: the ABS plastic is a terpolymer of three monomers, namely acrylonitrile, butadiene and styrene, and the relative contents of the three monomers can be changed at will to prepare various resins; of course, in other embodiments of the present application, the housing 100 may also include other insulating materials such as rubber. It should be noted that the "predetermined direction" mentioned in the present application refers to an extending direction of the receiving cavity 101, that is, a direction in which one of the first end wall 120 and the second end wall 130 points to the other.

In the process of welding the second end wall 130 to the base portion 110, the second end wall 130 is disposed relatively above the base portion 110, but even so, the second end wall 130 may slide relative to the base portion 110 to an edge beyond the base portion 110 in the process; to overcome this disadvantage, the base portion 110 is further provided with a mounting cavity 102. Specifically, referring to fig. 5, which shows a cut-away view at C in fig. 3, and in combination with other figures, an end of the base shell 110 facing the second end wall 130 is recessed in an outer edge of the receiving cavity 101 to form the mounting cavity 102, and the mounting cavity 102 is communicated with the receiving cavity 101 and is disposed around the receiving cavity 101. More specifically, the mounting chamber 102 includes a first chamber 103, an inner wall surface of the first chamber 103 having a first mounting surface 1031 disposed obliquely to the preset direction X; the cross-sectional profile of the first mounting surface 1031 gradually expands in a direction in which the first end wall 120 is directed toward the second end wall 130 (i.e., a direction from top to bottom in fig. 5). Correspondingly, the second end wall 130 extends into the mounting cavity 102 and has a second mounting surface 131 also inclined with respect to the predetermined direction X, and the second mounting surface 131 is fixed to the first mounting surface 1031. In this way, the first cavity 103 can, on one hand, position and limit the second end wall 130 when the second end wall 130 is installed, so as to prevent the second end wall 130 from sliding out of the base portion 110; on the other hand, the first mounting surface 1031 and the second mounting surface 131 are attached to each other in a manner of being inclined with respect to the predetermined direction X, so as to increase the connection area between the base housing portion 110 and the second end wall 130, and further strengthen the connection strength between the two. Preferably, the first mounting surface 1031 and the second mounting surface 131 extend to form a closed ring around the accommodating cavity 101; this arrangement is intended to enable the second end wall 130 to be mounted to the mounting chamber 102 at any angle about the axis of the first mounting surface 1031 without rotating to a particular angle for mounting. Generally, a better mounting effect can be achieved when the included angle between the first mounting surface 1031 and the preset direction X is between 10 degrees and 80 degrees; when the included angle is between 40 ° and 60 °, the installation effect of the second end wall 130 is better. Preferably, the mounting cavity 102 further includes a second cavity 104, and a side of the first cavity 103 facing away from the first end wall 120 extends to an end surface of the base portion 110 to form the second cavity 104; that is, the second cavity 104 and the first cavity 103 are sequentially disposed and communicated in a direction in which the second end wall 130 is directed toward the first end wall 120. As such, the sidewall of the second cavity 104 may act as a further constraint on the second end wall 130. It should be noted that the above detailed description is presented in a state where the second end wall 130 is completely assembled with the base housing portion 110, but before the second end wall 130 is assembled with the base housing portion 110, an end of the second end wall 130 facing the base housing portion 110 may be sharp, as shown by a dotted line in fig. 5; during the ultrasonic welding, the sharp portions shown by the dotted lines are melted, and the second mounting surface 131 and the illustrated grid-like portions are formed under the guidance of the first mounting surface 1031, and the second mounting surface 131 connects the end surface of the second end wall 130 facing the first end wall 120 and the side surface of the second end wall 130. In other words, the second end wall 130 includes a main body and a filling portion surrounding the side wall of the main body and having a net shape as shown in fig. 5; wherein the filling part is formed by melting and flowing part of the material of the main body part to be arranged around the main body part, and the filling part forms a side wall of the second end wall 130, and the filling part is filled between the main body part and the side wall of the second cavity 104; the second cavity 104 is configured to receive molten material from the second end wall 130 during welding of the second end wall 130, thereby preventing the molten material from overflowing to the outer surface of the base housing portion 110. In other embodiments, the filling portion may be formed by curing the adhesive, instead of melting the main body portion.

It should be noted that, even though the mounting cavity 102 in the present embodiment is disposed on the base portion 110, and the contour of the first mounting surface 1031 gradually expands along the direction that the first end wall 120 points to the second end wall 130, the present application is not limited thereto. For example, fig. 6 shows a partially enlarged schematic view of a housing 100b provided in another embodiment of the present application (the enlarged region can refer to fig. 5), and the housing 100b still includes a base portion 110b, a first end wall and a second end wall 130 b. The base portion 110b is provided with the mounting cavity 102b, and the main difference between the housing 100b and the housing 100 in the above embodiment is that: the inner wall of the mounting cavity 102b comprises a first mounting surface 1031b, and the contour of the first mounting surface 1031b gradually shrinks along the direction that the first end wall points to the second end wall 130 b; accordingly, the profile of the second mounting surface 131b is gradually contracted along the direction. Since the first mounting surface 1031b and the side wall of the mounting cavity 102b enclose a groove structure, the housing 100b can omit a third cavity mentioned below. For another example, fig. 7 shows a partial schematic view of a housing 100c provided in another embodiment of the present application (the enlarged region may still refer to fig. 5), where the housing 100c still includes a base portion 110c, a first end wall and a second end wall 130 c. The housing 100c is mainly different from the housing 100 in the above embodiment in that: the second end wall 130b defines the mounting cavity 102b, and the base housing portion 110b is mounted to the mounting cavity 102 b.

Since the second end wall 130 faces upward and the first end wall 120 faces downward during the welding process, the fluid formed by melting the second end wall 130 may flow into the receiving cavity 101. To overcome this deficiency, the mounting cavity 102 further includes a third cavity 105. Specifically, the third cavity 105 is disposed on a side of the first cavity 103 facing the first end wall 120, and is communicated with the first cavity 103; then, the excessive fluid generated by the second end wall 130b during the ultrasonic welding process will flow into the third cavity 105 first, so as to reduce the risk of the fluid flowing into the receiving cavity 101 directly. In this embodiment, an end of the first mounting surface 1031 close to the first end wall 120 is just connected to a side wall of the third cavity 105, that is, the first mounting surface 1031 is disposed around the third cavity 105; this arrangement may facilitate molding of the base portion 110; this arrangement facilitates demolding of the base shell portion 110 when it is open, for example, when it is injection molded, and facilitates the cutting tool to sequentially mold the second cavity 104, the first cavity 103, and the third cavity 105, for example, when the base shell portion 110 is cut.

Further, in order to improve the welding efficiency during the ultrasonic welding of the second end wall 130 to the base portion 110, the side of the second end wall 130 facing away from the first end wall 120 is provided with an annular boss portion 132. Specifically, the first mounting surface 1031, the second mounting surface 131, and the boss portion 132 all have an overlapping region as viewed in a direction in which the second end wall 130 is directed toward the first end wall 120; that is, there is an overlapping area between the welding area of the second end wall 130 and the base portion 110 and the boss portion 132. When welding the second end wall 130 to the base portion 110, the probe of the ultrasonic welding apparatus may be pressed against the boss portion 132; the ultrasonic wave emitted from the ultrasonic welding apparatus is concentrated on the boss portion 132 and propagated toward the sharp portion via the boss portion 132, thereby forming the above-described structure after welding. In contrast, if the boss portion 132 is not provided, the probe of the ultrasonic welding apparatus is directly pressed against the surface of the second end wall 130, and the ultrasonic wave generated therefrom is easily diffused to other portions, and the energy for finally reaching the sharp portion and melting the sharp portion is small, which leads to low welding efficiency.

It should be understood that even though the base housing portion 110 and the first end wall 120 in the housing 100 of the present embodiment are integrally formed and fixed to the second end wall 130 by ultrasonic welding, in other embodiments of the present invention, the housing can be adapted to deform based on the above, as long as the three components are ensured to jointly enclose the receiving cavity 101; some of the embodiments are described below. For example, in some embodiments, the first end wall 120 and the second end wall 130 are both welded to the base housing portion 110. For example, in other embodiments, the base shell portion 110 includes a first portion and a second portion, and the first portion and the second portion are welded and fixed along the preset direction X; a first end wall 120 is provided at the end of the first section facing away from the second section and a second end wall 130 is provided at the end of the second section facing away from the first section. For example, in some other embodiments, the base portion 110 includes a first portion, a second portion and a third portion, and the first portion, the second portion and the third portion are sequentially connected and fixed along the predetermined direction X; a first end wall 120 is provided at the end of the first section facing away from the third section and a second end wall 130 is provided at the end of the second section facing away from the first section.

Referring back to fig. 3 for the electrode assembly 200, the electrode assembly 200 is a core component of the hard-shell battery cell 1, and is accommodated in the casing 100. In the present embodiment, the electrode assembly 200 is a winding structure, and includes a first pole piece (not shown), a second pole piece (not shown), and a separation film (not shown) disposed therebetween to separate the two; the first pole piece, the second pole piece, and the isolation film are wound in a stacked state into a cylindrical shape so as to be accommodated in the accommodation cavity 101. It is understood that the electrode assembly 200 may be in a stacked structure in other embodiments of the present application, and the present application is not limited to a specific form thereof.

Referring to fig. 8, a partial enlarged schematic view of the tab 300 shown in fig. 3 is shown, and in conjunction with fig. 3, a first end 310 of the tab 300 is connected to an outer ring of the electrode assembly 200, that is, the tab 300 is disposed near an inner wall of the base shell portion 110, and a second end 320 of the tab 300 extends out of the casing 100 through the first end wall 120 to form an external conductive terminal of the hard shell cell 1. Accordingly, the first end wall 120 is provided with a through hole 106 for passing the tab 300 therethrough, and the through hole 106 is disposed near an edge of the first end wall 120. In this embodiment, the through hole 106 includes a housing groove 107 and a communication hole 108; the outer surface of the first end wall 120 is recessed to form the receiving groove 107, and the communication hole 108 communicates with the receiving groove 107 and the receiving cavity 101, respectively. The receiving groove 107 is used for receiving the sealant 400 so as to seal the communication hole 108 after the tab 300 extends out of the communication hole 108, thereby preventing the electrolyte in the receiving cavity from overflowing through the through hole 106. Preferably, in order to reduce the overall occupied volume of the hard shell battery cell 1, the portion of the tab 300 extending out of the first end wall 120 is bent to be flush with the surface of the first end wall 120.

In this embodiment, the cross-sectional profile of the end of the receiving slot 107 away from the receiving cavity 101 is larger than the cross-sectional profile of the end thereof close to the receiving cavity 101. Specifically, the accommodating groove 107 includes a first groove 1071 and a second groove 1072. The outer surface of the first end wall 120 is recessed to form a first groove 1071, and the bottom wall of the first groove 1071 is recessed to form a second groove 1072; the communication holes 108 communicate the second groove 1072 with the housing chamber 101, respectively. Since the second groove 1072 entirely surrounds the port to which the communication hole 108 faces, the first groove 1071 in turn entirely surrounds the second groove 1072; therefore, when the electrode assembly 200 to which the tab 300 is welded is assembled into the case 100, the second end 320 of the tab 300 smoothly and naturally passes through the communication hole 108, the second groove 1072, and the first groove 1071 in order, and protrudes out of the case 100. Optionally, the first groove 1071 and/or the second groove 1072 have an elliptical cross-sectional profile perpendicular to the predetermined direction X; of course, in other embodiments of the present application, the cross-sectional profile may be rectangular, circular, or other shapes.

In the present embodiment, the hard shell battery cell 1 includes two tabs 300; one tab 300 is connected to the first pole piece and extends out of the housing 100 through one of the through holes 106, and the other tab 300 is connected to the second pole piece and extends out of the housing 100 through the other through hole 106. The through holes 106 are spaced apart from each other in the circumferential direction of the first end wall 120. It should be understood that, even though the hard shell battery cell 1 in the present embodiment includes two tabs 300, and each tab 300 corresponds to one through hole 106, the present application is not limited thereto; other embodiments of the present application may also make adaptations based thereon. For example, in some embodiments, the hard shell cell 1 may also include more than three tabs 300, each tab 300 extending out of the casing 100 through a through hole 106; for another example, in other embodiments, the hard shell electrical core 1 still includes two tabs 300, but the two tabs 300 extend out of the housing through the same through hole 106, and it should be noted that the gap between the two tabs 300 should be ensured to be greater than 0.1 millimeter (mm); for another example, in further embodiments, the hard shell battery cell 1 includes more than three tabs 300, and at least two tabs 300 extend out of the casing 100 through the same through hole 106.

It should be added that, in other embodiments of the present application, the tab 300 may also extend out of the housing 100 from the second end wall 130 or the base housing part 110 instead of the first end wall 120; and the housing 100 is provided with the above-mentioned through-hole 106 at a corresponding portion.

Referring to fig. 8, the sealant 400 is filled in the receiving groove 107, with reference to other drawings. In this embodiment, the sealant 400 includes the first adhesive layer 410 filled in the second groove 1072 and the second adhesive layer 420 filled in the first groove 1071. Wherein the viscosity of the second glue layer 420 is lower than the viscosity of the first glue layer 410 in a fluid state that has not yet been cured. When the first glue layer 410 is filled, the first glue layer 410 in a fluid state can fill the second groove 1072 at a faster rate and flow into the gap between the communication hole 108 and the tab 300; of course, it is also necessary to prevent the first adhesive layer 410 from flowing into the receiving cavity 101. That is, the first glue layer 410 mainly plays a role of filling and pre-sealing. The second glue layer 420 is refilled into the first groove 1071 after the first glue layer 410 is substantially cured; the viscosity is high, so that the sealing effect can be achieved on one hand, and a better fixing effect can be provided for the casing 100 and the tab 300 on the other hand. It should be noted that the first groove 1071 and the second groove 1072 are arranged to visually control the usage of the first adhesive layer 410 and the second adhesive layer 420, thereby facilitating the quantification of the two adhesive layers during use. The materials of the first adhesive layer 410 and the second adhesive layer 420 may be the same or different; when the materials of the two adhesive layers are the same, the proportion of each component in the two adhesive layers can be adjusted, so that the effect of making the viscosities of the two adhesive layers different is achieved. In some embodiments, first bondline 410 and/or second bondline 420 comprises at least one of an epoxy, a phenolic, a polyurethane, and a polyimide; of course, in other embodiments, other materials may be used for the first adhesive layer 410 and/or the second adhesive layer 420. In other embodiments of the present application, the sealant 400 may also include only one adhesive layer, such as only the first adhesive layer 410 or the second adhesive layer 420.

Further, in order to facilitate the smooth insertion of the tab 300 through the communication hole 108, a guide groove 1081 is formed at one end of the communication hole 108 adjacent to the receiving cavity 101. Specifically, the cross-sectional profile of one end of the guide groove 1081 facing away from the receiving cavity 101 is slightly larger than that of the tab 300, so as to facilitate the tab 300 to pass through; the cross-sectional profile of the guide groove 1081 gradually expands from the end away from the receiving cavity 101 to the end close to the receiving cavity 101, so that the second end 320 of the tab 300 can smoothly pass through the communication hole 108 under the guiding action of the guide groove 1081 when just extending into the communication hole 108. More specifically, in conjunction with fig. 8 to 10, in which fig. 9 and 10 respectively show a partial enlarged schematic view at E, F in fig. 4, the side wall of the guide groove 1081 includes first and second side wall elements 10811 and 10812 provided opposite to the main surface of the tab 300, and third and fourth side wall elements 10813 and 10814 provided opposite to the side surface of the tab 300; that is, the first sidewall 10811 is disposed opposite to the second sidewall 10812, and the third sidewall 10813 is disposed opposite to the fourth sidewall 10814. The first side wall 10811, the third side wall 10813, the second side wall 10812 and the fourth side wall 10814 are connected in sequence, and together enclose the communication hole 108. Here, the "main surface" is a surface defined by both the long side and the wide side of the tab 300, the first side wall element 10811 is disposed toward one main surface, and the second side wall element 10812 is disposed toward the other main surface; the "side surface" described in the present application is a surface defined by both the long side and the thickness side of the tab 300.

In this embodiment, the first sidewall element 10811 gradually departs from the receiving cavity 101 to the end close to the receiving cavity 101, and extends in an arc shape, that is, the first sidewall element 10811 itself forms a similar rounded structure. Meanwhile, the inner wall of the base portion 110 and the first end wall 120 are transited by an arc surface, and the arc surface is connected to the first sidewall portion 10811. In this way, when the electrode assembly 200 with the tab 300 is assembled into the receiving cavity, the tab 300 can be substantially aligned with the guide groove 1081, and the tab 300 can be attached to or brought close to the inner wall of the base housing part 110; the tab 300 smoothly passes through the first end wall 120 while being guided by the arc surface and the guide groove 1081 while the electrode assembly 200 is continuously inserted into the receiving cavity 101. Of course, in other embodiments of the present application, the first sidewall element 10811 may also extend along a straight line; accordingly, the inner wall of the base portion and the first end wall may be transited by an inclined surface, and the inclined surface is connected to the first sidewall 10811. Similarly, the second sidewall element 10812 gradually gets away from the tab 300 from the end away from the receiving cavity 101 to the end close to the receiving cavity 101, and extends linearly; of course, in other embodiments of the present application, the second sidewall element 10812 may also extend in an arc shape. The third sidewall element 10813 gradually separates from the tab 300 from the end away from the receiving cavity 101 to the end close to the receiving cavity 101, and extends linearly; of course, in other embodiments of the present application, the second sidewall element 10812 may also extend in an arc shape. Similarly, the fourth sidewall unit 10814 gradually gets away from the tab 300 from the end away from the receiving cavity 101 to the end close to the receiving cavity 101, and extends linearly; of course, in other embodiments of the present application, the fourth sidewall element 10814 may also extend in an arc shape. The provision of the first, second, third and fourth sidewall units 10811, 10812, 10813 and 10814 as described above can improve the tolerance of the tab 300 passing through the first end wall 120. In addition, the second end 320 of the tab 300 may also be adaptively rounded or beveled to further promote the smoothness of the tab 300 passing through the through hole 106. It should be understood that even though the first to fourth side wall units are all gradually distant from the tab 300 in the above-described direction in the present embodiment, the present application is not limited thereto as long as one of them is ensured to have the above-described characteristics; in other embodiments of the present application, the distance between one, two or three of the first to fourth side wall units and the tab 300 in the above-described direction may be maintained constant.

The hard-shell battery cell 1 provided by the embodiment of the application comprises an insulating shell 100, an electrode assembly 200, a tab 300 and a sealant 400. In which the electrode assembly 200 is received in the case 100. The tab 300 has a first end 310 fixed to the electrode assembly 200 and a second end 320 protruding out of the case through the case 100. Accordingly, the housing 100 is provided with a through hole 106 through which the tab 300 passes, the through hole 106 including the receiving groove 107 and the communication hole 108. Wherein, the containing groove 107 is formed by being concave from the outer surface of the shell 100, and the cross-sectional profile of one end of the containing groove 107 departing from the containing cavity 101 is larger than that of one end close to the containing cavity 101; the communication holes 108 respectively communicate the accommodating grooves 107 with the accommodating chambers 101; the second end 320 of the tab 300 extends out of the case 100 through the communication hole 108 and the receiving groove 107 in this order. The sealant 400 is provided in the housing groove 107 to close the communication hole 108 and fix the tab 300 to the case 100.

Compared with the hard shell battery cell in the current market, the hard shell battery cell 1 provided by the embodiment of the application does not adopt a pole column structure any more, but adopts a tab 300 structure instead; meanwhile, the hard shell battery cell 1 seals the connection part of the pole lug 300 and the shell 100 through the sealant 400, and special riveting equipment is not needed, so that the glue injection process is simpler than that of a riveting process and embedding of an insulating part. Besides, the hard-shell battery cell 1 can also omit an insulating part originally sleeved on the pole and a process of sleeving the insulating part on the pole. Therefore, the hard-shell battery cell 1 provided by the embodiment of the application can reduce the complexity of the current hard-shell battery cell assembly.

Meanwhile, one of the base portion 110 and the second end wall 130 of the housing 100 is provided with a mounting cavity 102, and the other is mounted to the mounting cavity 102. In this manner, during assembly of base portion 110 with second end wall 130, structures mounted to mounting cavity 102 (e.g., the second end wall) will not slide out of structures provided with mounting cavity 102 (e.g., base portion 110) under the constraints of mounting cavity 102. That is, the hard-shell battery cell 1 provided by the embodiment of the present application can reduce the risk that the conventional case of the hard-shell battery cell 1 cannot be assembled normally.

Meanwhile, a through hole 106 of the housing 100 through which the tab 300 passes is provided with a guide groove 1081 at one end close to the accommodating cavity 101; in this way, during the process of the tab extending into the through hole, even if it is not perfectly aligned with the central area of the through hole, but falls in the area of the guide groove 1081, it will gradually slide under the guidance of the guide groove 1081 into the central area of the through hole 106 and through the through hole 106. That is, the arrangement of the guide groove can reduce the risk that the tab 300 is easily injured when the hard-shell battery cell is assembled with the tab; meanwhile, the fault tolerance rate of the tab 300 during assembly is improved, and the difficulty of the tab 300 assembly is reduced.

Based on the same inventive concept, another embodiment of the present application further provides an electrical device 2, and with reference to fig. 11 and fig. 1 to 10, the electrical device 2 includes the hard-shell battery cell 1 in the above embodiment. In this embodiment, the power consumption device 2 is a mobile phone; it is understood that, in other embodiments of the present application, the electric device 2 may also be a tablet computer, a drone or other electric devices that need to be driven by electricity.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; within the context of the present application, where technical features in the above embodiments or in different embodiments can also be combined, the steps can be implemented in any order and there are many other variations of the different aspects of the present application as described above, which are not provided in detail for the sake of brevity; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims (12)

1. A hard-shell battery cell comprising a housing, wherein the housing comprises:

the base shell part is provided with a through accommodating cavity which extends along the preset direction;

a first end wall covering one end of the receiving cavity; and

a second end wall covering the other end of the accommodating cavity;

one of the base shell part and the second end wall is provided with an installation cavity, the inner wall of the installation cavity is provided with a first installation surface, and the first installation surface is obliquely arranged relative to the preset direction;

the other one of the base shell part and the second end wall is mounted in the mounting cavity and is provided with a second mounting surface, and the second mounting surface is fixed on the first mounting surface.

2. The hard shell cell of claim 1, wherein an end of the base housing portion facing the second end wall is recessed to form the mounting cavity, the mounting cavity being in communication with and surrounding the housing cavity;

the mounting cavity comprises a first cavity body, and the inner wall surface of the first cavity body comprises the first mounting surface.

3. The hard shell cell of claim 2, wherein the first mounting surface extends in a closed configuration around the receiving cavity.

4. The hard shell cell of claim 3, wherein the cross-sectional profile of the first mounting face gradually expands in a direction from the first end wall toward the second end wall.

5. The hard-shell electrical core of claim 4, wherein the mounting cavity further comprises a second cavity;

the side of the first cavity, which faces away from the first end wall, extends to the end face of the base shell part to form the second cavity;

the second end wall comprises a main body part and a filling part surrounding the side wall of the main body part, the filling part is formed by melting and flowing part of materials of the main body part to be arranged around the main body part, and the filling part is filled between the main body part and the side wall of the second cavity.

6. The hard-shell cell of claim 4, wherein the second end wall is secured to the base portion by welding or adhesive bonding.

7. The hard shell cell of claim 6, wherein the mounting cavity further comprises a third cavity;

the third cavity is arranged on one side, facing the first end wall, of the first cavity and communicated with the first cavity, and the first mounting surface surrounds the third cavity.

8. The hard shell cell of claim 3, wherein the first mounting surface has a gradually narrowing profile in a direction from the first end wall toward the second end wall.

9. The hard-shell battery cell of any one of claims 1 to 8, wherein an angle between the first mounting surface and the predetermined direction is between 10 ° and 80 °.

10. The hard-shell cell of any one of claims 1 to 8, wherein a side of the second end wall facing away from the first end wall is provided with an annular boss portion;

the first mounting surface, the second mounting surface, and the boss portion have an overlapping area therebetween, as viewed in a direction in which the second end wall is directed toward the first end wall;

the second end wall and the base shell are fixed through ultrasonic welding.

11. The hard-shell electrical core of any one of claims 1 to 8, wherein the shell is an insulator;

the material of the housing comprises plastic.

12. An electrical device comprising a hard-shell cell according to any one of claims 1 to 11.

Images