Battery case and battery pack

Abstract

The utility model relates to a battery case and a battery pack, the battery case comprises a case body and a cover plate, the case body is provided with an accommodating cavity with an opening at one end, three sequentially adjacent side walls on the case body are respectively provided with at least one limiting piece, and the limiting piece is arranged at one end of the bottom wall; the cover plate covers the shell so as to cover the opening, a plug connector is arranged at the position, corresponding to the limiting piece, of the cover plate, and the plug connector is matched with the limiting piece in an inserted mode so as to limit the cover plate to move in the direction away from the shell; an installation part is arranged on the side wall, without the limiting part, of the shell, an installation hole is formed in the position, corresponding to the installation part, of the cover plate, and the first fastener penetrates through the installation hole to be fixed to the installation part. By means of the arrangement, when the battery box is covered, preliminary limiting can be conducted through the limiting piece and the inserting piece, when the first fastener is installed, an operator does not need to press the face cover with the arm, the operator does not need to hold a screw with the hand to be matched with a tool to conduct transverse force installation, the situation that the screw is not stably held and falls onto an installation table is avoided, and the production and assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a battery shell and a battery pack. Background Art

[0002] In the related art, the cover of the battery pack is a sheet metal part, with waterproof foam attached to the inner side of the cover, and screw holes are opened around it. Riveting studs are set on the lower shell. During assembly, the cover is directly placed on the upper part of the lower shell, and the cover is locked with the lower shell by tightening the screws around it, while the waterproof foam is pressed to ensure the waterproof performance of the positive electrode.

[0003] However, in the related art, since waterproof foam is installed on the inner side of the cover plate, workers are required to press the cover plate with their arms during installation. Only after the foam is compressed until the holes of the cover plate and the lower shell are aligned can the screws be tightened. This may cause the surface cover to warp up easily, and the foam cannot be evenly compressed, thus affecting the waterproof effect of the whole machine. In addition, the screws are arranged in a circle on the side and are large in number. When screwing the screws, it is necessary to press the cover plate while holding the screws and installing them horizontally with the tools. This may cause the screws to become unstable and fall onto the mounting table, thus affecting the production and assembly efficiency. Utility Model Content

[0004] Based on this, it is necessary to provide a battery shell and a battery pack to address the technical problems that the structure of the battery shell in the related art affects the installation efficiency.

[0005] A battery case, comprising:

[0006] The housing is provided with a receiving cavity with an opening at one end, and at least one limiting member is provided on each of three adjacent side walls of the housing, and the limiting member is provided at one end of the bottom wall;

[0007] A cover plate, which is arranged on the shell to cover the opening, and a plug-in piece is arranged at a position of the cover plate corresponding to the limiter, and the plug-in piece is plugged and matched with the limiter to limit the cover plate from moving in a direction away from the shell;

[0008] A mounting piece is disposed on the side wall of the shell body where the limiting piece is not disposed, a mounting hole is disposed on the cover plate at a position corresponding to the mounting piece, and a first fastener passes through the mounting hole to be fixed to the mounting piece.

[0009] In one embodiment, the housing includes a first side wall, a second side wall, a third side wall and a fourth side wall connected end to end in sequence, the first side wall and the third side wall are arranged opposite to each other, the mounting member is arranged on the third side wall, and the limiting member includes:

[0010] A first limiting member, disposed on the first side wall, the first limiting member protrudes from the top surface of the first side wall in a direction away from the bottom wall, and a limiting hole is provided on the first limiting member;

[0011] Wherein, a first plug-in connector is arranged at a position on the cover plate corresponding to the first limiting member, and the first plug-in connector can be inserted into the limiting hole.

[0012] In one embodiment, the first limiting member is configured as a plate-shaped structure, the limiting hole is configured as a strip-shaped groove, and the first plug-in member is configured as a flat plug-in piece to match the strip-shaped groove.

[0013] In one embodiment, the second side wall is arranged opposite to the fourth side wall and is adjacent to the first side wall, and the limiting member further comprises:

[0014] A second limiting member, wherein at least one second limiting member is disposed on each of the second side wall and the fourth side wall, and a limiting groove extending along the first direction is disposed on the second limiting member;

[0015] In which, a second connector is arranged at a position on the cover plate corresponding to the second limit member, and a avoidance hole for inserting the second connector into the limit slot is arranged on a side wall of the limit slot, and the avoidance hole is communicated with the limit slot, and the second connector can be inserted into the limit slot from the avoidance hole, and after sliding a preset distance along the first direction in the limit slot to be staggered with the avoidance hole, the second connector can resist each other with the side wall of the limit slot to limit the second connector from moving along the second direction, and the first direction intersects with the second direction.

[0016] In one embodiment, an annular groove is provided on the outer circumferential surface of the shell at one end away from the bottom wall, and the annular groove is provided along the circumference of the shell, and the second limiting member includes:

[0017] A connecting portion, one end of which is disposed on a groove side wall of the annular groove away from the bottom wall, and the other end of which extends into the annular groove along a second direction;

[0018] A bending portion, one end of which is connected to the other end of the connecting portion, and the other end of which extends toward the bottom wall;

[0019] Wherein, the avoidance hole is arranged on the connecting portion, the limiting groove is opened on the bending portion, and the connecting portion is configured as a groove side wall of the limiting groove.

[0020] In one embodiment, the distance between the end surface of the groove wall of the annular groove away from the bottom wall and the groove bottom wall is smaller than the distance between the outer side wall of the shell and the groove bottom wall, and the side surface of the bent portion away from the groove bottom wall is located between the outer side surface of the shell and the end surface of the groove wall of the annular groove away from the bottom wall;

[0021] The cover plate includes a cover plate body and a peripheral side wall connected to the outer peripheral edge of the cover plate body, the second plug-in component is arranged on the inner side of the peripheral side wall, and the outer side of the peripheral side wall is flush with the outer side surface of the shell.

[0022] In one embodiment, an annular groove is provided on the outer peripheral surface of the shell at one end away from the bottom wall, and the mounting member is provided on the bottom wall of the annular groove;

[0023] The cover plate comprises a cover plate body and a peripheral side wall connected to the outer peripheral edge of the cover plate body, and the mounting hole is arranged on the peripheral side wall.

[0024] In one of the embodiments, the mounting member protrudes along the groove bottom wall in a direction away from the groove bottom wall, and the mounting member is provided with an internal thread.

[0025] In one embodiment, the battery case further comprises:

[0026] A waterproof plate, covering the shell;

[0027] A waterproof foam, arranged at the periphery of the shell and located between the waterproof plate and the end surface of the shell facing away from the bottom wall;

[0028] Wherein, the waterproof plate is fixedly connected to the shell via a second fastener.

[0029] A battery pack comprises the battery case as described above.

[0030] Beneficial effects of the utility model:

[0031] The utility model provides a battery shell for accommodating battery cells to protect the battery cells. A housing with an opening at one end is provided on the shell of the battery shell to accommodate the battery cells. The opening of the shell is covered by setting a cover plate at the opening of the shell. At least one limiting member is provided on each of the three adjacent side walls at one end of the shell away from the bottom wall, and a plug-in member is provided at a position corresponding to the limiting member on the cover plate so that the plug-in member can be plugged and matched with the limiting member, so that the plug-in member and the limiting member can preliminarily limit the cover plate when the cover plate is installed on the shell. A mounting member is provided on the side wall of the shell where no limiting member is provided, and a mounting hole is provided on the cover plate at a position corresponding to the mounting member, so that the final fixation of the cover plate and the shell can be achieved through the cooperation of the first fastener and the mounting member. Through the above structural form, the battery box can be initially limited by the limit parts and the connector when the cover is closed. When installing the first fastener, the operator does not need to press the cover with his arm, and does not need to hold the screws and use tools to install them horizontally, which avoids the situation where the screws cannot be held firmly and fall onto the installation table, thereby improving the production and assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG1 is a schematic diagram of the external contour structure of a battery case provided by an embodiment of the present utility model;

[0033] FIG2 is a schematic structural diagram of a housing provided by an embodiment of the present utility model;

[0034] FIG3 is a schematic structural diagram of a first position-limiting member in a housing provided by an embodiment of the present utility model;

[0035] FIG4 is a schematic diagram of the structure of the second position-limiting member in the housing provided by an embodiment of the present utility model;

[0036] FIG5 is a schematic structural diagram of a cover plate provided in one embodiment of the utility model;

[0037] FIG6 is a schematic diagram of the structure of the second connector on the cover plate provided by an embodiment of the present invention;

[0038] FIG7 is a schematic diagram of the structure of a battery shell waterproof plate and waterproof foam provided by an embodiment of the utility model;

[0039] FIG8 is a schematic diagram of the external contour of a battery case after a waterproof plate is installed on the shell according to an embodiment of the utility model;

[0040] Reference numerals:

[0041] Shell 100; bottom wall 110; side wall 120; first side wall 121; first limiting member 1211; limiting hole 1211a; second side wall 122; second limiting member 1221; connecting portion 1221a; bending portion 1221b; limiting groove 1221c; avoidance hole 1221d; third side wall 123; mounting member 1231; fourth side wall 124; annular groove 125; cover plate 200; cover plate body 210; first plug-in member 211; peripheral side wall 220; second plug-in member 221; mounting hole 230; first fastener 300; waterproof board 400; waterproof foam 500. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0048] Referring to Figures 1 to 8, a battery shell is provided, and the battery shell includes a shell 100 and a cover plate 200. The shell 100 is provided with a accommodating cavity with an opening at one end. Three adjacent side walls 120 on the shell 100 are each provided with at least one limiter, and the limiter is provided at one end away from the bottom wall 110; the cover plate 200 is covered on the shell 100 to cover the opening, and a plug-in piece is provided at a position corresponding to the limiter on the cover plate 200, and the plug-in piece is plugged and matched with the limiter to limit the cover plate 200 from moving in a direction away from the shell 100; a mounting piece 1231 is provided on the side wall 120 of the shell 100 where no limiter is provided, and a mounting hole 230 is provided on the cover plate 200 at a position corresponding to the mounting piece 1231, and a first fastener 300 passes through the mounting hole 230 and is fixed to the mounting piece 1231.

[0049] The battery shell provided in this embodiment is used to accommodate battery cells to protect the battery cells. Among them, a housing cavity with an opening at one end is provided on the shell 100 of the battery shell to accommodate the battery cells. The opening of the shell is covered by the cover plate 200. At one end of the shell 100 away from the bottom wall 110, at least one limiter is provided on each of the three adjacent side walls 120 in sequence, and a plug-in component is provided at a position corresponding to the limiter on the cover plate 200 so that the plug-in component can be plugged and matched with the limiter, so that when the cover plate 200 is installed on the shell 100, the plug-in component and the limiter can initially limit the cover plate 200. By setting a mounting piece 1231 on the side wall 120 of the housing 100 where no stopper is set, and setting a mounting hole 230 on the cover plate 200 at a position corresponding to the mounting piece 1231, the cover plate 200 and the housing 100 are finally fixed by the first fastener 300 and the mounting piece 1231. With the above structure, when the battery box is closed, the stopper and the connector can be used for preliminary position limiting. When installing the first fastener 300, the operator does not need to press the cover with his arm, and does not need to hold the screw and install it horizontally with the tool, which avoids the situation where the screw cannot be held firmly and falls on the installation table, thereby improving the production and assembly efficiency.

[0050] There is no limitation on the shape of the housing 100 , which can be set according to actual needs. In this embodiment, as shown in FIG2 , the housing 100 is constructed as a rectangular parallelepiped structure. The bottom wall 110 refers to the bottom wall 110 of the housing groove on the housing 100 .

[0051] As shown in Figures 2 and 3, in one embodiment, the shell includes a first side wall 121, a second side wall 122, a third side wall 123 and a fourth side wall 124 which are connected end to end in sequence, the first side wall 121 and the third side wall 123 are arranged opposite to each other, the mounting member 1231 is arranged on the third side wall 123, the limiting member includes a first limiting member 1211, the first limiting member 1211 is arranged on the first side wall 121, the first limiting member 1211 protrudes from the top surface of the first side wall 121 in a direction away from the bottom wall 110, and the first limiting member 1211 is provided with a limiting hole 1211a; wherein, a first plug-in member 211 is arranged at a position on the cover plate 200 corresponding to the first limiting member 1211, and the first plug-in member 211 can be inserted into the limiting hole 1211a.

[0052] As shown in FIG. 2 , specifically, in this embodiment, the first side wall 121 and the third side wall 123 are respectively located at the two ends of the length direction of the housing 100 (the X direction as shown in FIG. 2 ). There is no limitation on the specific structure and quantity of the first stopper 1211. In this embodiment, there is one first stopper 1211, which is arranged at the middle position of the top surface of the first side wall 121 (for ease of understanding, in this embodiment, the top surface of the housing 100 refers to the end surface of one end of the bottom wall 110 away from the accommodating cavity). The first stopper 1211 protrudes outward along the top surface, and the stopper hole 1211a is arranged as a through hole that passes through the first stopper 1211 in a direction perpendicular to the direction of the first side wall 121. Such an arrangement facilitates the arrangement of the first plug-in 211 on the cover plate 200 on the one hand, and facilitates the plugging of the first plug-in with the stopper hole 1211a on the other hand.

[0053] In one embodiment, as shown in FIG3 , the first stopper 1211 is configured as a plate-like structure, the stopper hole 1211a is configured as a strip-like groove, and as shown in FIG5 , the first connector 211 is configured as a flat plug-in piece to match the strip-like groove. Setting the first stopper 1211 as a plate-like structure is conducive to saving space, and setting the stopper hole 1211a as a strip-like groove and setting the first connector 211 as a flat plug-in piece is conducive to increasing the contact area between the first connector 211 and the first stopper 1211, thereby improving the reliability of the limit of the cover plate 200 and the housing 100.

[0054] Specifically, as shown in FIG2 , an annular groove 125 is provided on the end of the outer peripheral surface of the housing 100 away from the bottom wall 110, and the annular groove 125 extends along the circumference of the housing 100. Correspondingly, the portion of the annular groove 125 located on the first side wall 121 is a through groove extending along the width direction of the first side wall 121 (the Y direction as shown in FIG2 ), and the first stopper 1211 is configured to be integrally formed with the groove side wall near the top of the through groove. Specifically, a plate-shaped lug is provided on the groove side wall, and the plate-shaped lug is bent and extends in a direction away from the bottom wall of the accommodating cavity. Such a configuration can ensure the bonding strength of the two. The corners of the first stopper 1211 are rounded to prevent scratches on the cover plate 200 and other components during installation.

[0055] As shown in FIGS. 2, 4 and 6, in one embodiment, the second side wall 122 is arranged opposite to the fourth side wall 124 and is adjacent to the first side wall 121. The stopper also includes a second stopper 1221. The second side wall 122 and the fourth side wall 124 are each provided with at least one second stopper 1221. The second stopper 1221 is provided with a stopper groove 1223 extending along the first direction. The cover plate 200 is provided with a second connector 221 at a position corresponding to the second stopper 1221. The side wall of the stopper groove 1221c is provided with a second connector 221. A avoidance hole 1221d is provided on it for the second connector 221 to be inserted into the limit groove 1221c, and the avoidance hole 1221d is communicated with the limit groove 1221c. The second connector 221 can be inserted into the limit groove 1223 from the avoidance hole 1221d, and after sliding a preset distance along the first direction in the limit groove 1221c to be staggered with the avoidance hole 1221d, the second connector 221 can resist against the side wall of the limit groove 1221c to limit the second connector 221 from moving along the second direction, and the first direction intersects with the second direction.

[0056] Specifically, as shown in FIG. 2 , in this embodiment, the first direction refers to the direction along the length direction X of the housing 100, and the second direction refers to the direction along the height direction Z of the housing 100. There is no limitation on the number of second stoppers 1221 provided on the second side wall 122 and the fourth side wall 124. Only one second stopper 1221 may be provided on the second side wall 122, or a plurality of second stoppers 1221 may be provided at intervals. Similarly, the number of second stoppers 1221 on the fourth side wall 124 is also the same. In this embodiment, two second stoppers 1221 are provided at intervals on the second side wall 122 and the fourth side wall 124, respectively. By setting a limiting groove 1221c on the second limiting member 1221, and setting an avoidance hole 1221d on a groove side wall of the limiting groove 1221c for inserting the second connector 221 into the limiting groove 1221c, and by setting a second connector 221 corresponding to the second limiting member 1221 on the cover plate 200, after the second connector 221 is inserted into the limiting groove 1221c through the avoidance hole 1221d, after the second connector 221 is slid a certain distance along the extension direction of the limiting groove 1221c, the second connector 221 can be staggered with the avoidance hole 1221d, so that the two groove side walls of the limiting groove 1221c can resist the second connector 221, so that the groove side wall of the limiting groove 1221c3 can limit the movement of the second connector 221 in the second direction, thereby limiting the movement of the cover plate 200 along the second direction. In this embodiment, the second connector 221 is fixedly connected to the cover plate 200 , so that during installation, the second connector 221 can be moved relative to the second stopper 1221 only by moving the cover plate 200 along the first direction.

[0057] As shown in Figure 4, more specifically, an annular groove 125 is provided on the end of the outer circumferential surface of the shell 100 that is away from the bottom wall 110, and the annular groove 125 is arranged in a circle along the circumference of the shell. The second limiting member 1212 includes a connecting portion 1221a and a bending portion 1221b that are connected to each other. One end of the connecting portion 1221a is provided on the groove side wall of the annular groove 125 away from the bottom wall 110 of the shell 100, and the other end extends into the annular groove 125 along the second direction; one end of the bending portion 1221b is connected to the other end of the connecting portion 1221a, and the other end extends in a direction close to the bottom wall 110; wherein, the avoidance hole 1221d is provided on the connecting portion 1221a, the limiting groove 1221c is opened on the bending portion 1221b, and the connecting portion 1221a is configured as a side groove wall of the limiting groove 1221c.

[0058] It is understandable that the annular groove 125 is provided on the outer peripheral surface of the shell 100 at one end away from the bottom wall 110, specifically, through grooves are provided on the outer sides of the first side wall 121, the second side wall 122, the third side wall 123 and the fourth side wall 124, and the through grooves on each side wall are sequentially identical from beginning to end to form the annular groove 125 described above. Among them, when the cover plate 200 is covered on the shell 100, after the second plug-in component 221 provided on the cover plate 200 is inserted into the limiting groove 1221c, the part of the annular groove 125 located on the second side wall 122 and the fourth side wall 124 can provide a space for the second plug-in component 221 to avoid. The part of the annular groove 125 provided on the third side wall 123 can provide a space for the mounting component 1231, and when the first fastener 300 cooperates with the mounting component 1231, it can also provide space for the first fastener 300. This is so as to make the structure of the entire battery shell more compact. In this embodiment, the connecting portion 1221a is used to realize the mutual connection between the bent portion 1221b and the groove side wall of the annular groove 125. The bent portion 1221b is bent toward the bottom wall 110 so that when the second plug-in component 221 is inserted into the limiting groove and moves relative to the limiting groove 1221c, the annular groove 125 can provide a moving space for the second plug-in component 221 to move.

[0059] By providing a relief hole 1221d on the connecting portion 1221a, and connecting the relief hole 1221d with the limiting groove 1221c, the second connector 221 can be inserted into the limiting groove 1221c through the relief hole 1221d, and can slide along the extending direction of the limiting groove 1221c. In this way, the second connector 221 can be limited by the groove side wall of the limiting groove 1221c. When the limiting groove 1221c is connected with the relief hole 1221d, the whole is an "L"-shaped hole. In this embodiment, the second connector 221 is a rivet pin arranged on the peripheral side wall 220120 of the cover plate 200. During installation, the rivet pin can be first inserted into the limiting groove 1221c from the avoidance hole 1221d, and then the cover plate 200 can be pushed along the guiding direction of the limiting groove 1221c, so that the rivet pin can be limited by the side wall of the limiting groove 1221c.

[0060] In one embodiment, as shown in Figure 4, the distance between the end face of the groove wall of the annular groove 125 away from the bottom wall 110 and the groove bottom wall 110 is smaller than the distance between the outer side surface of the shell 100 and the groove wall, and the side surface of the bending portion 1221b away from the groove bottom wall 110 is located between the outer side surface of the shell 100 and the end face of the groove wall of the annular groove 125 away from the bottom wall 110; the cover plate 200 includes a cover plate body 210 and a peripheral side wall 220 connected to the outer peripheral edge of the cover plate body 210, the second plug-in component 221 is arranged on the inner side of the peripheral side wall 220, and the outer side of the peripheral side wall 220 is flush with the outer side surface of the shell 100. In this arrangement, other components can be arranged in the space formed by the size difference between the end face of the groove wall of the annular groove 125 away from the bottom wall 110 and the outer side surface of the shell 100. For example, the second stopper 1221 and the peripheral side wall 220 of the cover plate 200 can be arranged in the space, and after the cover plate 200 and the shell 100 are covered with each other, the peripheral side wall 220 of the cover plate 200 is flush with the outer side surface of the shell 100, so that the entire battery shell is more beautiful. Moreover, in this arrangement, when the cover plate 200 and the shell 100 are covered with each other, from the appearance, there is no bolt structure on the side wall where the first stopper 1211 and the second stopper 1221 are arranged.

[0061] As shown in FIG5 , in one embodiment, an annular groove 125 is provided on the end of the outer peripheral surface of the shell 100 away from the bottom wall 110, and a mounting member 1231 is provided on the groove bottom wall 110 of the annular groove 125; the cover plate 200 includes a cover plate body 210 and a peripheral side wall 220 connected to the outer peripheral edge of the cover plate body 210, and a mounting hole 230 is provided on the peripheral side wall 220. Such a configuration makes it easy to set the mounting member 1231 in the annular groove 125, which can save space for the entire shell 100 and make the structure of the entire shell 100 more compact. In addition, the mounting hole 230 is provided on the peripheral side wall 220 of the cover plate 200, so that there is no screw design on the cover plate body 210 of the cover plate 200, and only the peripheral side wall 220 on one side of the cover plate 200 has screws on the entire battery shell, thereby making the appearance of the entire battery shell more beautiful.

[0062] In one embodiment, the mounting member 1231 protrudes along the groove bottom wall 110 in a direction away from the groove bottom wall 110, and an internal thread is provided on the mounting member 1231. Specifically, the mounting member 1231 is a self-clinching stud provided on the groove bottom wall 110 of the annular groove 125, and an internal thread is provided on the self-clinching stud. A through hole is provided on the peripheral side wall 220 of the cover plate 200, and the cover plate 200 and the housing 100 can be fixed to each other by passing the first fastener 300, that is, a screw, through the through hole on the cover plate 200 and then cooperating with the internal thread on the self-clinching stud.

[0063] As shown in Figures 2, 7 and 8, in one embodiment, the battery shell also includes a waterproof plate 400 and a waterproof foam 500, the waterproof plate 400 is covered on the shell 100; the waterproof foam 500 is arranged on the periphery of the shell 100 and is located between the waterproof plate 400 and the end surface of the shell 100 facing away from the bottom wall 110; wherein the waterproof plate 400 and the shell 100 are fixedly connected by a second fastener.

[0064] Specifically, the second fastener is a bolt. A plurality of threaded holes are arranged at intervals on the periphery of the top surface of the housing 100. By covering the waterproof board 400 on the top surface of the housing 100 and then locking it with the second fastener, the waterproof foam 500 is pressed between the waterproof board 400 and the housing 100. In this way, the waterproof foam 500 is attached to the inner surface of the waterproof board 400 and then locked to the lower shell by screws. The screw installation direction is changed to be perpendicular to the plane of the waterproof board 400. The force direction of the waterproof foam 500 is perpendicular to the plane of the waterproof board 400, and the force area is a whole circle of the plane of the lower shell, which ensures that the force of the foam is uniform, avoids the situation where the cover is lifted, and improves the waterproof effect of the whole machine.

[0065] The utility model also provides a battery pack, which includes the above battery shell.

[0066] The installation principle of the battery case provided by the utility model is:

[0067] Lay the shell 100 flat with the opening facing upward, and the rivet pin on the cover 200 enters the limiting groove 1221c through the avoidance hole 1221d on the second limiting piece 1221 on the shell 100. Then push the entire cover 200 along the direction of the limiting groove 1221c to insert the first connector 211 into the limiting hole 1211a until the mounting hole 230 on the cover 200 fits with the mounting piece 1231 on the shell 100, and then tighten the first fastener 300 to complete the installation of the cover 200.

[0068] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A battery shell, characterized in that: The battery case comprises: The housing is provided with a receiving cavity with an opening at one end, and at least one limiting member is respectively provided on three adjacent side walls of the housing, and the limiting member is provided at one end away from the bottom wall; A cover plate, which is arranged on the shell to cover the opening, and a plug-in piece is arranged at a position of the cover plate corresponding to the limiter, and the plug-in piece is plugged and matched with the limiter to limit the cover plate from moving in a direction away from the shell; A mounting piece is disposed on the side wall of the shell body where the limiting piece is not disposed, a mounting hole is disposed on the cover plate at a position corresponding to the mounting piece, and a first fastener passes through the mounting hole to be fixed to the mounting piece.

2. The battery case according to claim 1, characterized in that: The housing comprises a first side wall, a second side wall, a third side wall and a fourth side wall which are connected end to end in sequence, the first side wall and the third side wall are arranged opposite to each other, the mounting member is arranged on the third side wall, and the limiting member comprises: A first limiting member, disposed on the first side wall, the first limiting member protrudes from the top surface of the first side wall in a direction away from the bottom wall, and a limiting hole is provided on the first limiting member; Wherein, a first plug-in connector is arranged at a position on the cover plate corresponding to the first limiting member, and the first plug-in connector can be inserted into the limiting hole.

3. The battery case according to claim 2, characterized in that: The first limiting member is configured as a plate-shaped structure, the limiting hole is configured as a strip-shaped groove, and the first plug-in member is configured as a flat plug-in piece to match the strip-shaped groove.

4. The battery case according to claim 2, characterized in that: The second side wall is arranged opposite to the fourth side wall and is adjacent to the first side wall. The limiting member further includes: A second limiting member, wherein at least one second limiting member is disposed on each of the second side wall and the fourth side wall, and a limiting groove extending along the first direction is disposed on the second limiting member; In which, a second connector is arranged at a position on the cover plate corresponding to the second limit member, and a avoidance hole for inserting the second connector into the limit slot is arranged on a side wall of the limit slot, and the avoidance hole is communicated with the limit slot, and the second connector can be inserted into the limit slot from the avoidance hole, and after sliding a preset distance along the first direction in the limit slot to be staggered with the avoidance hole, the second connector can resist each other with the side wall of the limit slot to limit the second connector from moving along the second direction, and the first direction intersects with the second direction.

5. The battery case according to claim 4, characterized in that: An annular groove is provided on the outer peripheral surface of the shell at one end away from the bottom wall, and the annular groove extends along the circumference of the shell. The second limiting member includes: A connecting portion, one end of which is disposed on a groove side wall of the annular groove away from the bottom wall, and the other end of which extends into the annular groove along a second direction; A bending portion, one end of which is connected to the other end of the connecting portion, and the other end of which extends toward the bottom wall; Wherein, the avoidance hole is arranged on the connecting portion, the limiting groove is opened on the bending portion, and the connecting portion is configured as a groove side wall of the limiting groove.

6. The battery case according to claim 5, characterized in that: The distance between the end surface of the groove wall of the annular groove away from the bottom wall and the groove bottom wall is smaller than the distance between the outer side surface of the shell and the groove bottom wall, and the side surface of the bent portion away from the groove bottom wall is located between the outer side surface of the shell and the end surface of the groove wall of the annular groove away from the bottom wall; The cover plate includes a cover plate body and a peripheral side wall connected to the outer peripheral edge of the cover plate body, the second plug-in component is arranged on the inner side of the peripheral side wall, and the outer side of the peripheral side wall is flush with the outer side surface of the shell.

7. The battery case according to claim 1, characterized in that: An annular groove is provided on the outer peripheral surface of the shell at one end away from the bottom wall, and the mounting member is provided on the bottom wall of the annular groove; The cover plate comprises a cover plate body and a peripheral side wall connected to the outer peripheral edge of the cover plate body, and the mounting hole is arranged on the peripheral side wall.

8. The battery case according to claim 7, characterized in that: The mounting piece protrudes along the groove bottom wall in a direction away from the groove bottom wall, and the mounting piece is provided with an internal thread.

9. The battery case according to any one of claims 1 to 8, characterized in that: The battery case further comprises: A waterproof plate, covering the shell; A waterproof foam, arranged at the periphery of the shell and located between the waterproof plate and the end surface of the shell facing away from the bottom wall; Wherein, the waterproof plate is fixedly connected to the shell via a second fastener.

10. A battery pack, characterized in that: The battery pack comprises a battery case as described in any one of claims 1 to 9.

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