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 body, a cover plate assembly, a fixed end plate provided with an avoiding through groove and a conductive assembly, the cover plate assembly comprises a cover plate body provided with a connecting window and a first insulating part provided with a penetrating structure, and the conductive assembly comprises a pole and a connecting piece; the two ends of the pole are connected with the cover plate body and the connecting piece respectively, the connecting piece is arranged between the first insulating part and the fixed end plate and extends to the position below the penetrating structure, and the tab is connected to the position, below the penetrating structure, of the connecting piece. The tab is connected with the area, located below the penetrating structure, of the connecting piece, so that the space occupied by multiple times of bending of the tab is saved, a part of the tab is overlapped with the cover plate assembly in space, the occupied space is reduced, the space utilization rate is increased, and the service life of the tab is prolonged. And a space for performing insulation protection on the connecting sheet is defined by the first insulating part and the fixed end plate, so that 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, a welding platform, a cover body, an upper plastic and a 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 to achieve 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 pole ear. In order to facilitate the welding of the pole ear and the pole, it is usually necessary to gather the pole ears on both sides of the pole group separately, and after multiple bends to form an approximate S shape, the pole ears on both sides of the pole group are welded to the corresponding pole, so as to achieve current conduction.

[0004] Since it is necessary to reserve space in the accommodating cavity for accommodating the poles and space for the pole ears on both sides of the pole group to be bent multiple times, a large amount of space in the accommodating cavity is occupied, which not only has 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] The outer shell body is a hollow shell structure with two sides open;

[0009] A cover plate assembly, the cover plate assembly comprising a cover plate body and a first insulating member, the cover plate body being arranged at the openings on both sides of the shell body, closing the shell body, and forming an accommodating cavity for accommodating the electrode group, the cover plate body being provided with a connecting window, the first insulating member being arranged on a side of the cover plate body facing the accommodating cavity, and being provided with a through structure communicating with the connecting window;

[0010] 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;

[0011] A conductive component, the conductive component includes a pole and a connecting piece, one end of the pole is fixed to the side of the cover body facing away from the accommodating cavity, the connecting piece is connected to the other 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 the side of the connecting piece facing the cover body, and is located below the through-structure.

[0012] 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.

[0013] Optionally, the battery housing further comprises a closing assembly, which comprises a closing plate and an insulating plate, wherein the closing plate is connected to the cover body to close the connection window, and the insulating plate is connected to the closing plate and is located between the closing plate and the pole ear.

[0014] 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 the cover plate body. 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.

[0015] Optionally, a mounting boss is provided on the side of the cover body 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 in the mounting through hole and abuts against the limiting step, the plug-in portion is inserted in the connecting window, and the insulating plate is arranged on the side of the plug-in portion facing away from the closing portion.

[0016] Optionally, the connecting piece includes a first connecting part and a second connecting part, the first connecting part is connected to the pole, the second connecting part is connected to the pole ear, the surface of the first connecting part facing the cover body is lower than the surface of the second connecting part facing the cover body, so as to form the connecting piece with a Z-shaped cross-section, or the surface of the first connecting part facing the cover body is flush with the surface of the second connecting part facing the cover body, so as to form the connecting piece with a straight-line cross-section.

[0017] Optionally, a through-slot is provided on the second connecting portion, and the pole tab passes through the through-slot and is connected to the second connecting portion.

[0018] Optionally, at least two anti-rotation protrusions are provided on a side of the first insulating member facing the cover body, and anti-rotation through holes corresponding to the anti-rotation protrusions one by one are opened on the cover body, and the anti-rotation protrusions are inserted into the anti-rotation through holes.

[0019] 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.

[0020] 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.

[0021] Beneficial effects of the present invention:

[0022] The present invention provides a battery shell, which has a connection window formed on a cover plate body on both sides of the shell body, a through structure formed on a first insulating member, an avoidance groove for the pole ear to pass through on a 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 located 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 enclose a space for insulating and protecting the connecting piece, thereby improving the insulation protection performance.

[0023] 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

[0024] Figure 1 is a cross-sectional view of one side of a battery provided by the present invention;

[0025] Figure 2 is a longitudinal cross-sectional view of one side of the battery provided by the present invention;

[0026] Figure 3 It is a structural schematic diagram of the cover plate body in the battery housing provided by the present invention;

[0027] Figure 4 yes Figure 3 A magnified view of the structure of part A;

[0028] Figure 5 It is a structural schematic diagram of the first insulating member in the battery housing provided by the present invention;

[0029] Figure 6 It is a structural schematic diagram of a fixed end plate in a battery housing provided by the present invention;

[0030] Figure 7 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;

[0031] Figure 8 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;

[0032] Fig. 9 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;

[0033] Fig.10 It is a schematic diagram of a straight-section connecting piece without a through groove in a battery housing provided by the present invention;

[0034] Fig.11 It is a structural exploded view of the battery provided by the present invention.

[0035] In the figure:

[0036] 100, pole group; 200, pole ear;

[0037] 1. Shell body;

[0038] 2. Cover plate assembly; 21. Cover plate body; 211. Connection window; 212. Mounting boss; 213. Mounting through hole; 214. Position limiting step; 215. Anti-rotation through hole; 22. First insulating member; 221. Through structure; 222. Inserting protrusion; 223. Anti-rotation protrusion; 23. Riveting block; 24. Second insulating member;

[0039] 3. Fix the end plate; 31. Avoid the through slot; 32. Shape the edge;

[0040] 4. Conductive assembly; 41. Pole; 411. Riveted portion; 412. Position-limiting portion; 42. Connecting piece; 421. First connecting portion; 422. Second connecting portion; 423. Through-through slot;

[0041] 5. Closing assembly; 51. Closing plate; 511. Closing portion; 512. Insertion portion; 52. Insulating plate; 521. Insertion groove;

[0042] 6. Insulation protective film;

[0043] 7. Protective side panels. DETAILED DESCRIPTION

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] like Figures 1 to 10 As shown, the battery housing comprises a housing body 1, a cover assembly 2, at least one fixed end plate 3 and a conductive assembly 4. The housing body 1 is a hollow shell structure with two open sides. The cover assembly 2 comprises a cover body 21 and a first insulating member 22. The cover body 21 is arranged at the open positions on both sides of the housing body 1 to close the housing body 1 to form a receiving cavity for receiving the electrode group 100. A connecting window 211 is provided on the cover body 21. The first insulating member 22 is provided on one side of the cover body 21 facing the receiving cavity and is provided with a through structure 221 connected to the connecting window 211. At least one fixed end plate 3 is arranged in the receiving cavity and Located on the side of the pole group 100 where the pole ear 200 is provided, an avoidance groove 31 connected to the through structure 221 is opened on the fixed end plate 3, and the conductive component 4 includes a pole 41 and a connecting piece 42, one end of the pole 41 is fixed to the side of the cover body 21 away from the accommodating cavity, the connecting piece 42 is connected to the other end of the pole 41 extending into the accommodating cavity, and is located between the first insulating member 22 and the fixed end plate 3, the side of the connecting piece 42 away from the pole 41 extends along the first direction to the bottom of the through structure 221, the pole ear 200 of the pole group 100 is connected to the side of the connecting piece 42 facing the cover body 21, and is located below the through structure 221.

[0051] The battery housing is provided with connection windows 211 on the cover body 21 on both sides of the housing body 1, a through structure 221 on the first insulating member 22, and an avoidance groove 31 for the pole ear 200 to pass through on the fixed end plate 3, and a connecting piece 42 connected to the pole column 41 is arranged between the first insulating member 22 and the fixed end plate 3. On the one hand, when the pole ears 200 on both sides of the pole group 100 are connected to the connecting piece 42, the pole ears 200 on both sides of the pole group 100 can pass through the avoidance groove and be connected to the back of the connecting piece 42 by using the connection window 211 and the through structure 221. The pole ears 200 on both sides of the pole group 100 are on one side, thereby saving the space occupied by multiple bending of the pole ears 200 in the accommodating cavity, and a part of the pole ears 200 on both sides of the pole group 100 overlap with the cover plate assembly 2 located on both sides of the shell body 1 in space, thereby reducing the space occupied by the pole ears 200 on both sides of the accommodating cavity and improving the space utilization rate, and the connecting piece 42 is placed between the first insulating member 22 and the fixed end plate 3, so that the first insulating member 22 and the fixed end plate 3 together enclose a space for insulating and protecting the connecting piece 42, thereby improving the insulation protection performance.

[0052] Among them, the connection between the cover body 21 and the pole 41 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 21 can also adopt the form of a minimalist cover. In this case, the pole 41 is a protruding structure formed by stamping the cover body 21.

[0053] In this embodiment, if Figures 1 to 4 As shown, the connection between the cover body 21 and the pole 41 is in the form of riveting. At this time, the cover assembly 2 includes a riveting block 23 and a second insulating member 24 in addition to the cover body 21 and the first insulating member 22. The second insulating member 24 is located on the side of the cover body 21 away from the first insulating member 22. The first insulating member 22 and the second insulating member 24 are used to insulate and protect both sides of the cover body 21. At this time, the riveting block 23 is arranged on the side of the second insulating member 24 away from the cover body 21. The pole 41 includes a riveting portion 411 and a limiting portion 412. When the pole 41 is fixedly connected, the riveting portion 411 of the pole 41 passes through the first insulating member 22, the cover body 21 and the second insulating member 24 in sequence, and is inserted into the riveting block 23. At this time, the first insulating member 22 is clamped between the limiting portion 412 and the cover body 21. Finally, the riveting block 23 is riveted with the riveting portion 411, thereby completing the fixation of the pole 41.

[0054] Among them, the number of fixed end plates 3 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 3 are arranged in the battery casing, respectively located on both sides of the pole group 100 with the pole ear 200.

[0055] Alternatively, if Figure 2 , Figure 6 As shown, the fixed end plate 3 is also provided with a shaping extension 32, which is provided on the wall surface on either side of the avoidance slot 31 along the second direction, and the angle between the direction in which the shaping extension 32 extends and the wall surface is an acute angle. By providing the shaping extension 32 in the avoidance slot 31 of the fixed end plate 3, and making the angle between the direction in which the shaping extension 32 extends and the wall surface of the avoidance slot 31 an acute angle, the extension direction of the shaping extension 32 can be mutually fitted with the inclined surface of the terminal lug 200 after the terminal lug 200 is gathered, thereby achieving the effect of gathering and fixing the terminal lug 200 after the terminal lug 200 is gathered, improving the gathering state of the terminal lug 200, and enhancing the gathering effect.

[0056] In this embodiment, the fixed end plate 3 and the first insulating member 22 are both components separately formed and prepared by the injection molding process. Since the fixed end plate 3 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.

[0057] Optionally, the battery housing further includes a sealing assembly 5, which includes a sealing plate 51 and an insulating plate 52, wherein the sealing plate 51 is connected to the cover body 21 to seal the connection window 211, and the insulating plate 52 is connected to the sealing plate 51 and is located between the sealing plate 51 and the tab 200. The insulating plate 52 is arranged between the sealing plate 51 that seals the connection window 211 and the tab 200, so as to prevent the tab 200 from contacting the cover body 21 and causing a short circuit, thereby enhancing insulation protection.

[0058] It should also be noted that, since the cover body 21 is a plain aluminum plate made of metal, the closing plate 51 for closing the connecting window 211 on the cover body 21 is also made of metal. After the pole ear 200 and the connecting piece 42 are welded through the connecting window 211 and the through structure 221, the closing plate 51 is welded to the cover body 21, so that the cover body 21 and the closing plate 51 are connected as a whole, thereby achieving the sealing of the connecting window 211. In this embodiment, the insulating plate 52 is a plastic part directly injection molded on the closing plate 51 by an injection molding process.

[0059] Alternatively, if Figure 2 , Figure 5 As shown, a plug-in groove 521 is provided on the side of the insulating plate 52 facing away from the closing plate 51, and a plug-in protrusion 222 is provided on the side of the first insulating member 22 facing the cover body 21. The plug-in protrusion 222 is continuously arranged around the circumferential edge of the penetration structure 221, and the plug-in protrusion 222 is inserted into the plug-in groove 521. By providing the plug-in protrusion 222 on the first insulating member 22, providing the plug-in groove 521 on the insulating plate 52, and plugging the plug-in groove 521 with the plug-in protrusion 222, on the one hand, it is convenient to position and limit the insulating plate 52 and the first insulating member 22 during assembly, and ensure the accuracy of the installation position. On the other hand, since both the insulating plate 52 and the first insulating member 22 have insulation, multiple insulation is achieved by plugging the plug-in protrusion 222 with the plug-in groove 521, and the insulation distance is increased, so as to prevent short circuits between the closing plate 51, the cover body 21 and the metal parts inside the battery housing, and improve safety.

[0060] Among them, the wall surface of the plug-in groove 521 is adapted to the shape of the plug-in protrusion 222. The shape of the plug-in protrusion 222 can be freely selected according to actual needs, and the plug-in protrusion 222 with a rectangular cross-sectional shape can be used, or the plug-in protrusion 222 with a serrated cross-sectional shape can be used.

[0061] Alternatively, if Figure 3 , Figure 4As shown, a mounting boss 212 is provided on the side of the cover body 21 facing away from the accommodating cavity, and a mounting through hole 213 connected to the connecting window 211 and distributed in a stepped manner is opened on the mounting boss 212 to form a limiting step 214 between the mounting through hole 213 and the connecting window 211, and the closing plate 51 includes a closing portion 511 and a plug-in portion 512, the closing portion 511 is inserted into the mounting through hole 213 and abuts against the limiting step 214, the plug-in portion 512 is inserted into the connecting window 211, and the insulating plate 52 is arranged on the side of the plug-in portion 512 facing away from the closing portion 511. By arranging a mounting boss 212 on the side of the cover body 21 away from the accommodating cavity, and opening mounting through holes 213 connected to the connecting window 211 and distributed in a stepped manner on the mounting boss 212, the installation position of the closing plate 51 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 42. 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.

[0062] In this embodiment, the mounting boss 212 is made by the cover body 21 through a stamping process, and the shape of the mounting boss 212 is adapted to the shape of the connecting window 211, wherein the shape of the connecting window 211 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 211 is rectangular, so the mounting boss 212 is also rectangular.

[0063] Alternatively, if Figure 7 , Figure 8 As shown, the connecting piece 42 includes a first connecting portion 421 and a second connecting portion 422, wherein the first connecting portion 421 is connected to the pole 41, and the second connecting portion 422 is connected to the pole lug 200, and the surface of the first connecting portion 421 facing the cover body 21 is lower than the surface of the second connecting portion 422 facing the cover body 21, so as to form a connecting piece 42 with a Z-shaped cross section. By making the surface of the second connecting portion 422 higher than the surface of the first connecting portion 421, the connecting position of the pole lug 200 is raised by the second connecting portion 422, thereby further reducing the additional occupation of the pole lug 200 in the accommodation cavity, so that the space utilization rate is further improved.

[0064] Alternatively, if Fig. 9 , Fig.10As shown, the connecting piece 42 includes a first connecting portion 421 and a second connecting portion 422, the first connecting portion 421 is connected to the pole 41, the second connecting portion 422 is connected to the pole ear 200, and the surface of the first connecting portion 421 facing the cover body 21 is flush with the surface of the second connecting portion 422 facing the cover body 21, so as to form a connecting piece 42 with a straight cross section. By making the surfaces of the first connecting portion 421 and the second connecting portion 422 flush, the connecting piece 42 is a flat plate structure, so that the processing and preparation of the connecting piece 42 is convenient, the processing and preparation procedures are reduced, and the processing cost is reduced.

[0065] Alternatively, if Figure 7 , Fig. 9 As shown, a through slot 423 is provided on the second connection portion 422, and the tab 200 passes through the through slot 423 and is connected to the second connection portion 422. By providing the through slot 423 on the second connection portion 422, the tab 200 is provided with the shortest path to pass over the connection sheet 42, 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.

[0066] Among them, since the connecting piece 42 has different cross-sectional shapes, it can have a variety of different combinations depending on whether the through groove 423 is provided on the connecting piece 42. For example, Fig.10 As shown, the connecting piece 42 with a straight cross section does not have a through groove 423. Fig. 9 As shown, the connecting piece 42 with a straight cross section is provided with a through slot 423, as shown in FIG. Figure 8 As shown, the connecting piece 42 with a Z-shaped cross section does not have a through groove 423 and Figure 7 As shown, the connecting piece 42 with a Z-shaped cross section is provided with a through slot 423. In addition, the connecting piece 42 and the pole 41 can be integrally formed by a molding process, or the connecting piece 42 and the pole 41 can be separately prepared and then welded during assembly.

[0067] In this embodiment, the connecting piece 42 and the pole 41 are of a separate structure, and the connecting piece 42 has a Z-shaped cross section and a through slot 423 .

[0068] Alternatively, if Figure 3 , Figure 5As shown, at least two anti-rotation protrusions 223 are provided on the side of the first insulating member 22 facing the cover body 21, and anti-rotation through holes 215 corresponding to the anti-rotation protrusions 223 are provided on the cover body 21, and the anti-rotation protrusions 223 are inserted into the anti-rotation through holes 215. By providing the anti-rotation protrusions 223 on the first insulating member 22 and providing the anti-rotation through holes 215 on the cover body 21, the accuracy of the relative position between the first insulating member 22 and the cover body 21 after the two are assembled is ensured, and relative displacement between the first insulating member 22 and the cover body 21 is avoided, which affects the insulation protection of the first insulating member 22 to the cover body 21.

[0069] Among them, the anti-rotation protrusion 223 is adapted to the shape of the anti-rotation hole 215. The anti-rotation hole 215 can be a circular hole, an elliptical hole or a polygonal hole, etc. In this embodiment, the anti-rotation hole 215 is a circular hole, so the anti-rotation protrusion 223 is a cylindrical protrusion.

[0070] Alternatively, if Fig.11 As shown, the battery housing further includes an insulating protective film 6 and at least one protective side plate 7 connected to the insulating protective film 6, and the insulating protective film 6 is coated on the surface of the electrode group 100 without the pole ear 200. By coating the surface of the electrode group 100 without the pole ear 200 with the insulating protective film 6 connected to at least one protective side plate 7, the surface of the electrode group 100 without the pole ear 200 is protected.

[0071] In the present embodiment, the insulating protective film 6 is a polyester film, and the number of protective side plates 7 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 7 are provided. Before the pole group 100 is coated with the polyester film, four protective side plates 7 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.

[0072] In this embodiment, if Fig.11 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.

[0073] 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: The outer shell body is a hollow shell structure with two sides open; A cover plate assembly, the cover plate assembly comprising a cover plate body and a first insulating member, the cover plate body being arranged at the openings on both sides of the shell body, closing the shell body, and forming an accommodating cavity for accommodating the electrode group, the cover plate body being provided with a connecting window, the first insulating member being arranged on a side of the cover plate body facing the accommodating cavity, and 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, one end of the pole is fixed to the side of the cover body facing away from the accommodating cavity, the connecting piece is connected to the other 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 the side of the connecting piece facing the cover body, 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 sealing component, which includes a sealing plate and an insulating plate. The sealing plate is connected to the cover body to seal the connection window. The insulating plate is connected to the sealing plate and is located between the sealing plate and the tab.

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 the cover body. 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 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 cover body is lower than the surface of the second connecting portion facing the cover body, so as to form the connecting piece with a Z-shaped cross-section, or the surface of the first connecting portion facing the cover body is flush with the surface of the second connecting portion facing the cover body, 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 protrusions are provided on a side of the first insulating member facing the cover body, and anti-rotation through holes corresponding to the anti-rotation protrusions are opened on the cover body, 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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