Battery shell and battery

Abstract

The invention belongs to the technical field of batteries, and discloses a battery shell and a battery, the battery shell comprises a shell assembly, a fixed end plate and a conductive assembly, the shell assembly comprises a shell body, a cover plate body and a first insulating part, the first wall surface of the shell body and the cover plate body are both provided with connecting windows, the first insulating part is provided with a penetrating structure, and the first wall surface of the shell body is provided with a through hole; an avoiding through groove is formed in the fixed end plate, the conductive assembly comprises a pole connected to the cover plate body and the first wall face and a connecting piece connected with the pole, and the connecting piece is arranged between the first insulating part and the fixed end plate and extends to the position below the penetrating structure. The tab is connected with the area, located below the penetrating structure, of the connecting piece, the space occupied by multiple times of bending of the tab is omitted, a part of the tab and the shell assembly are overlapped in space, occupied space is reduced, the space for insulation protection of the connecting piece is defined by the first insulating part and the fixing end plate, and the reliability of the battery is improved. Therefore, the insulation protection performance is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery casing and a battery. Background Art

[0002] Traditional blade batteries usually include a battery casing and a pole group. Since the pole group of a blade battery is usually in the form of pole ears on both sides, the battery casing usually includes two battery covers and a battery shell with open sides. The battery cover mainly includes pole posts, welding bases, cover bodies, connecting sheets, upper plastic and lower plastic, etc. The two battery covers are used to close the openings on both sides of the battery shell to form a cavity for storing the pole group, wherein the pole ears of the pole group are connected to the pole posts in the battery cover through connecting sheets, thereby realizing current conduction.

[0003] In a traditional battery cover, the pole needs to pass through the upper plastic, the cover body and the lower plastic, extend into the accommodating cavity and be welded to the connecting piece. In order to facilitate the welding of the pole ear and the connecting piece, it is usually necessary to gather the pole ear and bend it several times to form an approximate S shape, and then weld the pole ear and the surface of the connecting piece away from the pole to achieve current conduction.

[0004] Since it is necessary to reserve space in the accommodating cavity for accommodating the pole, space for accommodating the connecting piece, and space for multiple bending of the pole ear, a large amount of space in the accommodating cavity is occupied, which not only leads to poor space utilization, but also greatly compresses the space available for the pole group, resulting in low energy density. Summary of the invention

[0005] The object of the present invention is to provide a battery casing and a battery with good space utilization and high energy density.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] In one aspect, a battery housing is provided, the battery housing comprising:

[0008] A shell assembly, the shell assembly comprising a shell body, a cover body and a first insulating member, the shell body comprising a first wall and a plurality of second walls perpendicular to the first wall, the plurality of second walls being arranged around the first wall to form a hollow shell structure with a single-side opening, the cover body being arranged at the opening of the shell body to close the shell body to form an accommodating cavity for accommodating a pole group, the first wall and the cover body being provided with connecting windows, the first wall and the cover body being provided with the first insulating member on one side facing the accommodating cavity, the first insulating member being provided with a through structure communicating with the connecting window;

[0009] At least one fixed end plate, at least one of the fixed end plates is arranged in the accommodating cavity and is located on a side of the pole group where the pole ear is arranged, and the fixed end plate is provided with an avoidance groove communicating with the through structure;

[0010] A conductive component, the conductive component includes a pole and a connecting piece, the pole is fixed to the cover body and the first wall on a side facing away from the accommodating cavity, the connecting piece is connected to one end of the pole extending into the accommodating cavity, and is located between the first insulating member and the fixed end plate, the side of the connecting piece facing away from the pole extends along the first direction to below the through-structure, the pole ear of the pole group is connected to a side of the connecting piece facing the first insulating member, and is located below the through-structure.

[0011] Optionally, the fixed end plate is further provided with a shaping extension, and the shaping extension is provided on the wall surface of the avoidance groove on either side along the second direction, and the angle between the extending direction of the shaping extension and the wall surface is an acute angle.

[0012] Optionally, the battery housing further includes a closing component, wherein the closing component corresponds one-to-one to the connecting window, and each of the closing components includes a closing plate and an insulating plate, wherein the closing plate is used to close the connecting window, and the insulating plate is connected to the closing plate and is located between the closing plate and the pole ear.

[0013] Optionally, a plug-in groove is provided on the side of the insulating plate facing away from the closing plate, and a plug-in protrusion is provided on the side of the first insulating member facing away from the connecting plate. The plug-in protrusion is continuously arranged around the circumferential edge of the through structure, and the plug-in protrusion is inserted in the plug-in groove.

[0014] Optionally, a mounting boss is provided on the side of the cover body and the first wall surface facing away from the accommodating cavity, and a mounting through hole connected to the connecting window and distributed in a stepped manner is opened on the mounting boss to form a limiting step between the mounting through hole and the connecting window, and the closing plate includes a closing portion and a plug-in portion, the closing portion is inserted into the mounting through hole and abuts against the limiting step, the plug-in portion is inserted into the connecting window, and the insulating plate is arranged on the side of the plug-in portion facing away from the closing portion.

[0015] Optionally, the connecting piece includes a first connecting portion and a second connecting portion, the first connecting portion is connected to the pole, the second connecting portion is connected to the pole ear, the surface of the first connecting portion facing the first insulating member is lower than the surface of the second connecting portion facing the first insulating member, so as to form the connecting piece with a Z-shaped cross-section, or the surface of the first connecting portion facing the first insulating member is flush with the surface of the second connecting portion facing the first insulating member, so as to form the connecting piece with a straight-line cross-section.

[0016] Optionally, a through-groove is provided on the second connecting portion, and the pole tab passes through the through-groove and is connected to the second connecting portion.

[0017] Optionally, at least two anti-rotation through holes are provided on the cover plate body and the first wall surface, and anti-rotation protrusions corresponding to the anti-rotation through holes are provided on the first insulating member, and the anti-rotation protrusions are inserted into the anti-rotation through holes.

[0018] Optionally, the battery housing further comprises an insulating protective film and at least one protective side plate connected to the insulating protective film, wherein the insulating protective film is coated on the surface of the electrode group where the electrode lug is not provided.

[0019] On the other hand, a battery is provided, comprising a pole group and a battery casing as described in any one of the above items, wherein the pole group is arranged in the accommodating cavity of the battery casing.

[0020] Beneficial effects of the present invention:

[0021] The present invention provides a battery shell, which has a connection window on the first wall surface of the shell body and the cover plate body, a through structure on the first insulating member, an avoidance groove for the pole ear to pass through on the fixed end plate, and a connecting piece connected to the pole column is arranged between the first insulating member and the fixed end plate. On the one hand, when the pole ears on both sides of the pole group are connected to the connecting piece, the pole ears on both sides of the pole group can pass through the avoidance groove and be connected to the side of the connecting piece away from the pole group by using the connection window and the through structure, thereby saving the space occupied by multiple bending of the pole ears on both sides in the accommodating cavity, and making a part of the pole ears on both sides of the pole group overlap with the cover plate assemblies on both sides of the shell body in space, thereby reducing the occupation of the space in the accommodating cavity by the pole ears on both sides, improving the space utilization rate, and placing the connecting piece between the first insulating member and the fixed end plate, so that the first insulating member and the fixed end plate together surround a space for insulating and protecting the connecting piece, thereby improving the insulation protection performance.

[0022] The present invention also provides a battery, which uses the above-mentioned battery casing, and due to the increase in internal space, the volume of the electrode group is further increased, thereby improving the energy density of the battery and increasing the power supply capacity of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a cross-sectional view of the first wall side of the battery housing provided by the present invention;

[0024] Figure 2 is a longitudinal cross-sectional view of the first wall side of the battery housing provided by the present invention;

[0025] Figure 3 is a cross-sectional view of the battery housing cover body side provided by the present invention;

[0026] Figure 4 It is a longitudinal cross-sectional view of the battery housing cover body side provided by the present invention;

[0027] Figure 5 It is a structural schematic diagram of the outer shell body in the battery shell provided by the present invention;

[0028] Figure 6 It is a structural schematic diagram of the cover plate body in the battery housing provided by the present invention;

[0029] Figure 7 yes Figure 6 A magnified view of the structure of part A;

[0030] Figure 8 It is a structural schematic diagram of the first insulating member in the battery housing provided by the present invention;

[0031] Fig. 9 It is a structural schematic diagram of a fixed end plate in a battery housing provided by the present invention;

[0032] Fig.10 It is a schematic diagram of a Z-shaped cross-section connecting piece provided with a through-through groove in a battery housing provided by the present invention;

[0033] Fig.11 It is a schematic diagram of a Z-shaped cross-section connecting piece in a battery housing provided by the present invention without a through groove;

[0034] Fig.12 It is a schematic diagram of a straight-section connecting piece with a through-groove provided in a battery housing provided by the present invention;

[0035] Fig.13 It is a schematic diagram of a straight-section connecting piece without a through groove in a battery housing provided by the present invention;

[0036] Fig.14 It is a structural exploded view of the battery provided by the present invention.

[0037] In the figure:

[0038] 100, pole group; 200, pole ear;

[0039] 10. Shell assembly; 101. Shell body; 1011. First wall; 1012. Second wall; 102. Cover body; 103. First insulating member; 1031. Through structure; 1032. Inserting protrusion; 1033. Anti-rotation protrusion; 104. Connecting window; 105. Riveting block; 106. Second insulating member; 107. Mounting boss; 108. Mounting through hole; 109. Position limiting step; 110. Anti-rotation through hole;

[0040] 20. Fixed end plate; 201. Avoidance slot; 202. Plastic extension;

[0041] 30, conductive component; 301, pole; 3011, riveted portion; 3012, limit portion; 302, connecting piece; 3021, first connecting portion; 3022, second connecting portion; 3023, through-through slot;

[0042] 40, closing assembly; 401, closing plate; 4011, closing portion; 4012, plug-in portion; 402, insulating plate; 4021, plug-in groove;

[0043] 50. Insulation protective film;

[0044] 60. Protective side panels. DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0046] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0048] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0049] Since traditional batteries require the pole ears on both sides of the pole group to be bent multiple times to form an S-shape before they can be conveniently connected to the pole column, the pole ears on both sides of the pole group occupy a large amount of space in the accommodating cavity, which not only has poor space utilization, but also greatly compresses the space that can be used by the pole group, resulting in low energy density.

[0050] Therefore, in order to reduce the space occupied by the pole ears on both sides of the pole group in the accommodating cavity, improve the space utilization rate, increase the space that can be used by the pole group, and improve the energy density, this embodiment provides a battery housing.

[0051] like Figures 1 to 13 As shown, the battery shell includes a shell assembly 10, at least one fixed end plate 20 and a conductive assembly 30, the shell assembly 10 includes a shell body 101, a cover body 102 and a first insulating member 103, the shell body 101 includes a first wall 1011 and a plurality of second walls 1012 perpendicular to the first wall 1011, the plurality of second walls 1012 are arranged around the first wall 1011 to form a hollow shell structure with a single side opening, the cover body 102 is arranged at the opening of the shell body 101, the shell body 101 is closed, and the housing cavity for accommodating the electrode group 100 is formed, the first wall 1011 and the cover body 102 are both provided with a connecting window 104, the first wall 1011 and the cover body 102 are both provided with a first insulating member 103 on one side facing the housing cavity, and the first insulating member 103 A through structure 1031 connected to the connecting window 104 is provided, at least one fixed end plate 20 is provided in the accommodating cavity and is located on the side of the pole group 100 where the pole ear 200 is provided, and an avoidance groove 201 connected to the through structure 1031 is provided on the fixed end plate 20. The conductive component 30 includes a pole 301 and a connecting piece 302. The cover body 102 and the side of the first wall 1011 facing away from the accommodating cavity are both fixed with the pole 301, the connecting piece 302 is connected to one end of the pole 301 extending into the accommodating cavity, and is located between the first insulating member 103 and the fixed end plate 20, the side of the connecting piece 302 facing away from the pole 301 extends along the first direction to below the through structure 1031, the pole ear 200 of the pole group 100 is connected to the side of the connecting piece 302 facing the first insulating member 103, and is located below the through structure 1031.

[0052] The battery housing is provided with a connection window 104 on the first wall 1011 of the housing body 101 and the cover body 102, a through structure 1031 is provided on the first insulating member 103, and an avoidance groove 201 for the pole ear 200 to pass through is provided on the fixed end plate 20, and a connecting piece 302 connected to the pole column 301 is arranged between the first insulating member 103 and the fixed end plate 20. On the one hand, when the pole ears 200 on both sides of the pole group 100 are connected to the connecting piece 302, the pole ears 200 on both sides of the pole group 100 can pass through the avoidance groove and be connected to the pole group 100 by using the connection window 104 and the through structure 1031. The connecting piece 302 is away from one side of the pole group 100, thereby saving the space occupied by multiple bending of the pole ears 200 on both sides in the accommodating cavity, and making a part of the pole ears 200 on both sides of the pole group 100 overlap with the cover plate assembly located on both sides of the shell body 101 in space, thereby reducing the space occupied by the pole ears 200 on both sides in the accommodating cavity and improving space utilization. The connecting piece 302 is placed between the first insulating member 103 and the fixed end plate 20, so that the first insulating member 103 and the fixed end plate 20 together enclose a space for insulating and protecting the connecting piece 302, thereby improving the insulation protection performance.

[0053] Among them, the connection between the cover body 102 and the pole 301 can adopt various different types of connection methods such as riveting and welding. The different connection methods will result in certain differences in the types of parts for matching the connection. In addition, considering the production cost, the cover body 102 can also adopt the form of a minimalist cover. In this case, the pole 301 is a protruding structure formed by stamping the cover body 102.

[0054] In this embodiment, if Figures 1 to 4As shown, the connection between the cover body 102 and the pole 301 is in the form of riveting. At this time, in addition to the shell body 101, the cover body 102 and the first insulating member 103, the shell assembly 10 also includes a rivet block 105 and a second insulating member 106. The second insulating member 106 is located on the side of the cover body 102 and the first wall 1011 of the shell body 101 away from the first insulating member 103. The first insulating member 103 and the second insulating member 106 are used to insulate and protect both sides of the cover body 102 and the first wall 101. At this time, the rivet block 105 is arranged on the side of the second insulating member 106 away from the first insulating member 103. The pole 301 includes a riveted portion 3011 and a limiting portion 3012. When the pole 301 is fixedly connected, taking the pole 301 on one side of the cover body 102 as an example, the riveted portion 3011 of the pole 301 passes through the first insulating member 103, the cover body 102 and the second insulating member 106 in sequence, and is inserted into the riveted block 105. At this time, the first insulating member 103 is clamped between the limiting portion 3012 and the cover body 102. Finally, the riveted block 105 is riveted to the riveted portion 3011, thereby completing the fixation of the pole 301.

[0055] Among them, the number of fixed end plates 20 can be set to one or two, and the specific number can be freely selected according to actual needs. In this embodiment, two fixed end plates 20 are arranged in the battery casing, respectively located on both sides of the pole group 100 with the pole ear 200.

[0056] Optionally, a shaping extension 202 is further provided on the fixed end plate 20, and the shaping extension 202 is provided on the wall surface on either side of the avoidance slot 201 along the second direction, and the angle between the direction in which the shaping extension 202 extends and the wall surface is an acute angle. By providing the shaping extension 202 in the avoidance slot 201 of the fixed end plate 20, and making the angle between the direction in which the shaping extension 202 extends and the wall surface of the avoidance slot 201 an acute angle, the extension direction of the shaping extension 202 can be mutually fitted with the inclined surface of the terminal lug 200 after it is gathered, thereby achieving the effect of gathering and fixing the gathered terminal lug 200, improving the gathering state of the terminal lug 200, and enhancing the gathering effect.

[0057] In this embodiment, the fixed end plate 20 and the first insulating member 103 are both components separately formed and prepared by the injection molding process. Since the fixed end plate 20 is a plastic part made by the injection molding process, on the one hand, due to its own soft material, it can avoid hard contact with the pole ear 200 and cause damage to the pole ear 200. On the other hand, since it also has insulating properties, the insulation protection effect is improved.

[0058] Optionally, the battery housing further includes a sealing component 40, and the sealing component 40 corresponds to the connection window 104 one by one. Each sealing component 40 includes a sealing plate 401 and an insulating plate 402. The sealing plate 401 is used to seal the connection window 104, and the insulating plate 402 is connected to the sealing plate 401 and is located between the sealing plate 401 and the pole ear 200. The insulating plate 402 is arranged between the sealing plate 401 that seals the connection window 104 and the pole ear 200, so as to avoid the pole ear 200 from contacting with the cover body 102 and causing a short circuit, thereby enhancing the insulation protection.

[0059] It should also be noted that, since the cover body 102 is a bare aluminum plate made of metal material, and the outer shell body 101 is an aluminum shell made of metal material, the closing plate 401 that closes the connection window 104 on the cover body 102 and the first wall 1011 of the outer shell body 101 is also made of metal. After the electrode ear 200 and the connecting piece 302 are welded through the connecting window 104 and the through structure 1031, the closing plate 401 is welded to the cover body 102 and the first wall 1011, so that the cover body 102 and the first wall 1011 are connected as a whole with the closing plate 401, thereby realizing the sealing of the connection window 104. In this embodiment, the insulating plate 402 is a plastic part directly injection molded on the closing plate 401 by an injection molding process.

[0060] Optionally, a plug-in groove 4021 is provided on the side of the insulating plate 402 facing away from the closing plate 401, and a plug-in protrusion 1032 is provided on the side of the first insulating member 103 facing away from the connecting plate 302. The plug-in protrusion 1032 is continuously arranged around the circumferential edge of the through structure 1031, and the plug-in protrusion 1032 is inserted into the plug-in groove 4021. By providing a plug-in protrusion 1032 on the first insulating member 103, providing a plug-in groove 4021 on the insulating plate 402, and plugging the plug-in groove 4021 with the plug-in protrusion 1032, on the one hand, it is convenient to position and limit the insulating plate 402 and the first insulating member 103 during assembly, thereby ensuring the accuracy of the installation position; on the other hand, since both the insulating plate 402 and the first insulating member 103 are insulating, multiple insulation is achieved by plugging the plug-in protrusion 1032 with the plug-in groove 4021, thereby increasing the insulation distance, preventing short circuits between the closing plate 401, the cover plate body 102 and the metal parts inside the battery housing, and improving safety.

[0061] Among them, the wall surface of the plug-in groove 4021 is adapted to the shape of the plug-in protrusion 1032. The shape of the plug-in protrusion 1032 can be freely selected according to actual needs, and the plug-in protrusion 1032 with a rectangular cross-sectional shape can be used, or the plug-in protrusion 1032 with a serrated cross-sectional shape can be used.

[0062] Optionally, a mounting boss 107 is provided on the side of the cover body 102 and the first wall 1011 facing away from the accommodating cavity, and a mounting through hole 108 connected to the connecting window 104 and distributed in a stepped manner is opened on the mounting boss 107 to form a limiting step 109 between the mounting through hole 108 and the connecting window 104. The closing plate 401 includes a closing portion 4011 and a plug-in portion 4012. The closing portion 4011 is inserted into the mounting through hole 108 and abuts against the limiting step 109. The plug-in portion 4012 is inserted into the connecting window 104, and the insulating plate 402 is arranged on the side of the plug-in portion 4012 facing away from the closing portion 4011. By arranging a mounting boss 107 on the side of the cover body 102 and the first wall 1011 away from the accommodating cavity, and opening mounting through holes 108 connected to the connecting window 104 and distributed in a stepped manner on the mounting boss 107, the installation position of the closing plate 401 is elevated. On the one hand, more installation space is reserved for the pole ear 200, thereby facilitating the subsequent welding of the pole ear 200 and the connecting plate 302. On the other hand, the installation position of the pole ear 200 in the height direction is improved, thereby further reducing the additional occupation of the pole ear 200 in the accommodating cavity, so that the space utilization rate is further improved.

[0063] In this embodiment, the mounting boss 107 is made by a stamping process, and the shape of the mounting boss 107 is adapted to the shape of the connecting window 104, wherein the shape of the connecting window 104 can be different types such as polygonal, circular or elliptical, and its specific form can be freely selected according to actual needs. In this embodiment, the connecting window 104 is rectangular, so the mounting boss 107 is also rectangular.

[0064] Optionally, the connecting piece 302 includes a first connecting portion 3021 and a second connecting portion 3022, wherein the first connecting portion 3021 is connected to the pole 301, and the second connecting portion 3022 is connected to the pole tab 200, and the surface of the first connecting portion 3021 facing the first insulating member 103 is lower than the surface of the second connecting portion 3022 facing the first insulating member 103, so as to form a connecting piece 302 with a Z-shaped cross section. By making the surface of the second connecting portion 3022 higher than the surface of the first connecting portion 3021, the connection position of the pole tab 200 is raised by the second connecting portion 3022, thereby further reducing the additional occupation of the space in the accommodation cavity by the pole tab 200, so that the space utilization rate is further improved.

[0065] Optionally, the surface of the first connection portion 3021 facing the first insulating member 103 is flush with the surface of the second connection portion 3022 facing the first insulating member 103, so as to form a connection piece 302 with a straight cross section. By making the surfaces of the first connection portion 3021 and the second connection portion 3022 flush, the connection piece 302 is a flat plate structure, which facilitates the processing and preparation of the connection piece 302, reduces the processing and preparation procedures, and reduces the processing cost.

[0066] Optionally, a through slot 3023 is provided on the second connection portion 3022, and the tab 200 passes through the through slot 3023 and is connected to the second connection portion 3022. By providing the through slot 3023 on the second connection portion 3022, the shortest path is provided for the tab 200 to pass over the connecting sheet 302, so that the length of the tab 200 is reduced, the space occupied by the tab 200 is reduced, and the space utilization rate is improved.

[0067] Among them, since the connecting piece 302 has different cross-sectional shapes, it can have a variety of different combinations depending on whether the through groove 3023 is provided on the connecting piece 302. For example, Fig.10 As shown, the connecting piece 302 with a straight cross section does not have a through slot 3023. Fig. 9 As shown, the connecting piece 302 with a straight cross section is provided with a through slot 3023, as shown in FIG. Figure 8 As shown, the connecting piece 302 with a Z-shaped cross section does not have a through groove 3023 and Figure 7 As shown, the connecting piece 302 with a Z-shaped cross section is provided with a through slot 3023. In addition, the connecting piece 302 and the pole 301 can be integrally formed by a molding process, or the connecting piece 302 and the pole 301 can be prepared separately and then welded during assembly.

[0068] In this embodiment, the connecting piece 302 and the pole 301 are of a separate structure, and the connecting piece 302 is in a Z-shaped cross section and has a through slot 3023 .

[0069] Optionally, at least two anti-rotation through holes 110 are provided on the cover body 102 and the first wall 1011, and anti-rotation protrusions 1033 corresponding to the anti-rotation through holes 110 are provided on the first insulating member 103, and the anti-rotation protrusions 1033 are inserted into the anti-rotation through holes 110. By providing the anti-rotation protrusions 1033 on the first insulating member 103 and providing the anti-rotation through holes 110 on the cover body 102 and the first wall 1011, the accuracy of the relative positions between the first insulating member 103 and the cover body 102, and between the first insulating member 103 and the first wall 1011 after assembly is ensured, and relative displacement between the first insulating member 103 and the cover body 102, and between the first insulating member 103 and the first wall 1011 is avoided, which affects the insulation protection of the first insulating member 103.

[0070] Among them, the anti-rotation protrusion 1033 is adapted to the shape of the anti-rotation hole 110. The anti-rotation hole 110 can be a circular hole, an elliptical hole or a polygonal hole, etc. In this embodiment, the anti-rotation hole 110 is a circular hole, so the anti-rotation protrusion 1033 is a cylindrical protrusion.

[0071] Alternatively, if Fig.14 As shown, the battery housing further includes an insulating protective film 50 and at least one protective side plate 60 connected to the insulating protective film 50, and the insulating protective film 50 is coated on the surface of the electrode group 100 without the electrode tab 200. By coating the surface of the electrode group 100 without the electrode tab 200 with the insulating protective film 50 connected to at least one protective side plate 60, the surface of the electrode group 100 without the electrode tab 200 is protected.

[0072] In the present embodiment, the insulating protective film 50 is a polyester film, and the number of protective side plates 60 can be set to one, two, three or four, and the specific number is adjusted according to different protective requirements. In the present embodiment, a total of four protective side plates 60 are provided. Before the pole group 100 is coated with the polyester film, four protective side plates 60 are first hot-melted on the polyester film, so that when the polyester film is coated on the pole group 100, the pole group 100 is protected on all four sides to avoid damage when the pole group 100 is put into the shell, thereby reducing the product yield.

[0073] In this embodiment, if Fig.14 As shown, a battery is also provided, which includes an electrode group 100 and the above-mentioned battery shell, and the electrode group 100 is arranged in the receiving cavity of the battery shell. By applying the above-mentioned battery shell, the volume of the electrode group 100 is further increased, thereby improving the energy density of the battery and increasing the power supply capacity of the battery.

[0074] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A battery housing, characterized in that: The battery housing comprises: A shell assembly, the shell assembly comprising a shell body, a cover body and a first insulating member, the shell body comprising a first wall and a plurality of second walls perpendicular to the first wall, the plurality of second walls being arranged around the first wall to form a hollow shell structure with a single-side opening, the cover body being arranged at the opening of the shell body to close the shell body to form an accommodating cavity for accommodating a pole group, the first wall and the cover body being provided with connecting windows, the first wall and the cover body being provided with the first insulating member on one side facing the accommodating cavity, the first insulating member being provided with a through structure communicating with the connecting window; At least one fixed end plate, at least one of the fixed end plates is arranged in the accommodating cavity and is located on a side of the pole group where the pole ear is arranged, and the fixed end plate is provided with an avoidance groove communicating with the through structure; A conductive component, the conductive component includes a pole and a connecting piece, the pole is fixed to the cover body and the first wall on a side facing away from the accommodating cavity, the connecting piece is connected to one end of the pole extending into the accommodating cavity, and is located between the first insulating member and the fixed end plate, the side of the connecting piece facing away from the pole extends along the first direction to below the through-structure, the pole ear of the pole group is connected to a side of the connecting piece facing the first insulating member, and is located below the through-structure.

2. The battery housing according to claim 1, characterized in that: The fixed end plate is also provided with a shaping extension, and the shaping extension is arranged on the wall surface of the avoidance groove on either side along the second direction, and the angle between the extending direction of the shaping extension and the wall surface is an acute angle.

3. The battery housing according to claim 1, characterized in that: The battery housing also includes a closing component, which corresponds to the connecting window one by one. Each of the closing components includes a closing plate and an insulating plate. The closing plate is used to close the connecting window. The insulating plate is connected to the closing plate and is located between the closing plate and the pole ear.

4. The battery housing according to claim 3, characterized in that: The insulating plate has a plug-in groove on one side facing away from the closing plate, and the first insulating member has a plug-in protrusion on one side facing away from the connecting plate. The plug-in protrusion is continuously arranged around the circumferential edge of the penetrating structure, and the plug-in protrusion is inserted into the plug-in groove.

5. The battery housing according to claim 3, characterized in that: A mounting boss is provided on the side of the cover body and the first wall surface facing away from the accommodating cavity, and a mounting through hole connected to the connecting window and distributed in a stepped manner is opened on the mounting boss to form a limiting step between the mounting through hole and the connecting window. The closing plate includes a closing portion and a plug-in portion, the closing portion is inserted into the mounting through hole and abuts against the limiting step, the plug-in portion is inserted into the connecting window, and the insulating plate is arranged on the side of the plug-in portion facing away from the closing portion.

6. The battery housing according to claim 1, characterized in that: The connecting piece includes a first connecting portion and a second connecting portion, the first connecting portion is connected to the pole, the second connecting portion is connected to the pole ear, the surface of the first connecting portion facing the first insulating member is lower than the surface of the second connecting portion facing the first insulating member, so as to form the connecting piece with a Z-shaped cross-section, or the surface of the first connecting portion facing the first insulating member is flush with the surface of the second connecting portion facing the first insulating member, so as to form the connecting piece with a straight-line cross-section.

7. The battery housing according to claim 6, characterized in that: The second connecting portion is provided with a through-groove, and the pole tab passes through the through-groove and is connected to the second connecting portion.

8. The battery housing according to claim 1, characterized in that: At least two anti-rotation through holes are provided on the cover plate body and the first wall surface, and anti-rotation protrusions corresponding to the anti-rotation through holes are provided on the first insulating member, and the anti-rotation protrusions are inserted into the anti-rotation through holes.

9. The battery housing according to claim 1, characterized in that: The battery housing further comprises an insulating protective film and at least one protective side plate connected to the insulating protective film, wherein the insulating protective film covers the surface of the electrode group where the electrode lug is not provided.

10. A battery, characterized in that The battery comprises a pole group and a battery casing as claimed in any one of claims 1 to 9, wherein the pole group is arranged in the accommodating cavity of the battery casing.

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