Battery shell and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery shell and a battery, the battery shell comprises a shell assembly, a conductive assembly and a cover plate assembly, the shell assembly comprises a shell body and a first insulating part, a first wall surface of the shell body is provided with a connecting window, the first insulating part is provided with a penetrating structure, and the connecting window is connected with the penetrating structure. The first insulating part is further provided with a fixed boss abutting against the pole group, the conductive assembly comprises a conductive pole column and a connecting piece, the connecting piece is connected with the conductive pole column and extends to the position below the penetrating structure, and a pole lug on one side of the pole group is connected to the connecting piece and located below the penetrating structure. The tab on one side of the pole group 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 on the side is omitted, a part of the tab on the side is overlapped with the shell assembly in space, the space utilization rate is increased, and the fixing boss is arranged on the first insulating part, so that the fixing effect is improved. Therefore, the pole group is limited, and poor connection caused by dislocation of the pole group is avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery casing and a battery. Background Technology

[0002] Traditional blade batteries typically consist of a battery casing and electrode arrays. Since the electrode arrays of blade batteries are usually in the form of tabs on both sides, the battery casing typically includes two battery covers and a battery casing with openings on both sides. The battery covers mainly include terminals, soldering stations, cover bodies, connecting tabs, upper plastic and lower plastic, etc. The two battery covers are used to close the openings on both sides of the battery casing to form a cavity for storing the electrode arrays. The tabs of the electrode arrays are connected to the terminals in the battery covers through connecting tabs, thereby enabling current conduction.

[0003] In traditional battery covers, the terminal post needs to pass through the upper plastic, the cover body, and the lower plastic to extend into the receiving cavity and be welded to the connecting piece. In order to facilitate the welding of the tab and the connecting piece, the tab usually needs to be gathered together and bent multiple times to form an approximate S-shape before the tab and the connecting piece are welded away from the surface of the terminal post, thereby realizing the conduction of current.

[0004] Because space needs to be reserved within the housing cavity to accommodate the pole post, the connecting piece, and the tab for multiple bends, a large amount of space within the housing cavity is occupied. This not only results in poor space utilization but also greatly compresses the space available for the pole assembly, leading to lower energy density. Utility Model Content

[0005] The purpose of this invention is to provide a battery casing and battery that have good space utilization and high energy density.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] On one hand, a battery housing is provided, the battery housing comprising:

[0008] The housing assembly includes an outer shell body and a first insulating member. The outer shell body includes a first wall surface and a plurality of second walls surface perpendicular to the first wall surface. The plurality of second walls surface are arranged around the periphery of the first wall surface to form a hollow housing structure with one side open. A connection window is provided on the first wall surface. The first insulating member is provided on the side of the first wall surface opposite to the opening and has a through structure communicating with the connection window. The first insulating member also has fixing bosses on both sides along the first direction that abut against the pole group.

[0009] A conductive component includes a conductive electrode post and a connecting piece. One end of the conductive electrode post is fixed to the first wall surface, and the other end of the conductive electrode post extends into the outer shell body and is connected to the connecting piece. The side of the connecting piece facing away from the conductive electrode post extends along the first direction to below the through structure. The tab on one side of the electrode group is connected to the side of the connecting piece facing the first wall surface and is located below the through structure.

[0010] A cover plate assembly includes a cover plate body and an independent pole. The cover plate body is located at the opening of the outer shell body to close the outer shell body and form a receiving cavity for accommodating the pole group. One end of the independent pole is fixed to the cover plate body, and the other side of the independent pole extends into the receiving cavity. The pole tab on the other side of the pole group is connected to the side of the independent pole facing the pole group.

[0011] Optionally, the first insulating member is further provided with a shaping extension edge, which is provided on the wall surface of the through structure on either side of the second direction, and the angle between the direction of the shaping extension edge and the wall surface is an acute angle.

[0012] Optionally, the battery casing further includes a sealing assembly, which includes a sealing plate and an insulating plate. The sealing plate is connected to the first wall surface to seal the connection window, and the insulating plate is connected to the sealing plate and located between the sealing plate and the tab.

[0013] Optionally, the insulating plate has a insertion groove on the side away from the sealing plate, and the first insulating member has an insertion protrusion on the side facing the first wall. The insertion protrusion is continuously arranged around the circumferential edge of the through structure and is inserted into the insertion groove.

[0014] Optionally, the first wall surface is provided with a mounting boss on the side away from the receiving cavity. The mounting boss has mounting through holes that communicate with the connecting window and are distributed in a stepped manner to form a limiting step between the mounting through holes and the connecting window. The sealing plate includes a sealing part and a plug-in part. The sealing part is inserted into the mounting through hole and abuts against the limiting step. The plug-in part is inserted into the connecting window. The insulating plate is provided on the side of the plug-in part away from the sealing part.

[0015] Optionally, the connecting piece includes a first connecting portion and a second connecting portion, the first connecting portion being connected to the conductive electrode post, and the second connecting portion being connected to the electrode tab. The surface of the first connecting portion facing the first wall is lower than the surface of the second connecting portion facing the first wall, thereby forming a connecting piece with a Z-shaped cross-section. Alternatively, the surface of the first connecting portion facing the first wall is flush with the surface of the second connecting portion facing the first wall, thereby forming a connecting piece with a straight cross-section.

[0016] Optionally, the second connecting part has a through-slot, and the electrode tab passes through the through-slot to connect with the second connecting part.

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

[0018] Optionally, the battery casing further includes an insulating protective film and at least one protective side plate connected to the insulating protective film, the insulating protective film covering the surface of the electrode assembly where the tabs are not provided.

[0019] On the other hand, a battery is provided, the battery including an electrode assembly and a battery housing as described in any of the above claims, the electrode assembly being disposed within the receiving cavity of the battery housing.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a battery casing. The battery casing has a connection window on the first wall of the casing body and a through structure on the first insulating member. On the one hand, when one side tab is connected to the conductive electrode post through the connecting piece, the side tab can be connected to the side of the connecting piece away from the electrode assembly using the connection window and the through structure. This saves the space occupied by the side tab due to multiple bends in the receiving cavity. Furthermore, a part of the side tab overlaps with the casing assembly in space, thereby reducing the space occupied by the side tab in the receiving cavity and improving space utilization. In addition, the first insulating member is also provided with a fixing boss that abuts against the electrode assembly, thereby limiting the electrode assembly and preventing the electrode assembly from shifting and causing poor connection.

[0022] This utility model also provides a battery that, by applying the aforementioned battery casing, increases the internal space, thereby further increasing the volume of the electrode assembly, thus improving the battery's energy density and power supply capacity. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the first wall side of the battery provided by this utility model;

[0024] Figure 2 This is a longitudinal section view of the first wall side of the battery provided by this utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the outer casing body in the battery casing provided by this utility model;

[0026] Figure 4 yes Figure 3 Enlarged view of the structure of section A;

[0027] Figure 5 This is a schematic diagram of the structure of the first insulating component in the battery casing provided by this utility model;

[0028] Figure 6 This is an assembly drawing of the cover plate assembly in the battery casing provided by this utility model;

[0029] Figure 7 This is a schematic diagram of a Z-shaped cross-section connecting piece with a through-groove in the battery casing provided by this utility model;

[0030] Figure 8 This is a schematic diagram of a Z-shaped cross-section connecting piece in the battery casing provided by this utility model that does not have a through groove;

[0031] Figure 9 This is a schematic diagram of a through-groove cross-section connecting piece in the battery casing provided by this utility model;

[0032] Figure 10 This is a schematic diagram of a straight-section connecting piece in the battery casing provided by this utility model that does not have a through slot;

[0033] Figure 11 This is an exploded view of the battery structure provided by this utility model.

[0034] In the picture:

[0035] 100, Electrode Group; 200, Electrode Sheet;

[0036] 1. Housing assembly; 11. Housing body; 111. First wall surface; 112. Second wall surface; 113. Connecting window; 114. Mounting boss; 115. Mounting through hole; 116. Limiting step; 117. Anti-rotation through hole; 12. First insulating component; 121. Through structure; 122. Fixing boss; 123. Shaping edge; 124. Insertion protrusion; 125. Anti-rotation protrusion; 13. Riveting block; 14. Second insulating component;

[0037] 2. Conductive component; 21. Conductive electrode post; 211. Riveting part; 212. Limiting part; 22. Connecting piece; 221. First connecting part; 222. Second connecting part; 223. Through slot;

[0038] 3. Cover plate assembly; 31. Cover plate body; 32. Independent pole;

[0039] 4. Enclosure component; 41. Enclosure plate; 411. Enclosure part; 412. Insertion part; 42. Insulating plate; 421. Insertion groove;

[0040] 5. Insulating protective film;

[0041] 6. Protective side panels. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0043] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0046] Traditional batteries require the tabs on both sides of the electrode assembly to be bent multiple times to form an approximate S-shape before they can be easily connected to the terminals. This results in the tabs on both sides of the electrode assembly occupying a large amount of space within the housing, leading to poor space utilization and significantly reducing the usable space of the electrode assembly, resulting in lower energy density.

[0047] Therefore, in order to reduce the space occupied by the tabs on both sides of the electrode assembly in the cavity, improve space utilization, increase the space that the electrode assembly can utilize, and improve energy density, this embodiment provides a battery casing.

[0048] like Figures 1 to 10 As shown, the battery casing includes a casing assembly 1, a conductive assembly 2, and a cover assembly 3. The casing assembly 1 includes a casing body 11 and a first insulating member 12. The casing body 11 includes a first wall surface 111 and multiple second wall surfaces 112 perpendicular to the first wall surface 111. The multiple second wall surfaces 112 are arranged around the periphery of the first wall surface 111 to form a hollow casing structure with one side open. A connection window 113 is provided on the first wall surface 111. The first insulating member 12 is located on the side of the first wall surface 111 opposite to the opening and has a through structure 121 communicating with the connection window 113. The first insulating member 12 also has fixing bosses 122 on both sides along the first direction that abut against the electrode assembly 100. The conductive assembly 2 includes conductive electrode posts 21 and connecting pieces 22. One end of the conductive electrode post 21 Fixed to the first wall surface 111, the other end of the conductive electrode post 21 extends into the outer shell body 11 and is connected to the connecting piece 22. The side of the connecting piece 22 away from the conductive electrode post 21 extends along the first direction to the bottom of the through structure 121. The electrode tab 200 on one side of the electrode group 100 is connected to the side of the connecting piece 22 facing the first wall surface 111 and is located below the through structure 121. The cover plate assembly 3 includes a cover plate body 31 and an independent electrode post 32. The cover plate body 31 is located at the opening of the outer shell body 11 and closes the outer shell body 11 to form a receiving cavity for accommodating the electrode group 100. One end of the independent electrode post 32 is fixed to the cover plate body 31, and the other side of the independent electrode post 32 extends into the receiving cavity. The electrode tab 200 on the other side of the electrode group 100 is connected to the side of the independent electrode post 32 facing the electrode group 100.

[0049] The battery casing has a connection window 113 on the first wall 111 of the casing body 11 and a through structure 121 on the first insulating member 12. On the one hand, when one side tab 200 is connected to the conductive electrode post 21 via the connecting piece 22, the side tab 200 can be connected to the side of the connecting piece 22 away from the electrode group 100 by the connection window 113 and the through structure 121, thereby saving the space occupied by the side tab 200 due to multiple bending in the receiving cavity. On the other hand, a part of the side tab 200 overlaps with the casing assembly 1 in space, thereby reducing the space occupied by the side tab 200 in the receiving cavity and improving the space utilization rate. Furthermore, the first insulating member 12 is also provided with a fixing boss 122 that abuts against the electrode group 100, thereby limiting the electrode group 100 and preventing the electrode group 100 from shifting and causing poor connection.

[0050] The cover plate assembly 3 used to close the opening of the outer shell body 11 can be freely set according to the requirements. The cover plate assembly 3 can be a riveted cover plate, a welded cover plate or a minimalist cover plate with a traditional structure. In this embodiment, the cover plate assembly 3 adopts the type of traditional riveted cover plate.

[0051] The connection between the first wall 111 of the outer shell body 11 and the conductive electrode post 21 can be achieved by riveting, welding and other different types of connection methods. The different connection methods result in different types of connecting parts. In addition, considering the manufacturing cost, the outer shell body 11 can also adopt a minimalist shell form. In this case, the conductive electrode post 21 is a protruding structure formed by stamping the first wall 111 of the outer shell body 11.

[0052] In this embodiment, as Figure 1 As shown, the connection between the first wall surface 111 of the outer shell body 11 and the conductive electrode post 21 is made by riveting. In this case, in addition to the outer shell body 11 and the first insulating member 12, the shell assembly 1 also includes a riveting block 13 and a second insulating member 14. The second insulating member 14 is located on the side of the first wall surface 111 away from the first insulating member 12. The first insulating member 12 and the second insulating member 14 are used to provide insulation protection for both sides of the first wall surface 111 of the outer shell body 11. At this time, the riveting block 13 is set on the side of the second insulating member 14 away from the first wall surface 111. The conductive electrode post 21 includes a riveting part 211 and a limiting part 212. When the conductive electrode post 21 is fixedly connected, the riveting part 211 of the conductive electrode post 21 passes through the first insulating member 12, the first wall surface 111 and the second insulating member 14 in sequence and is inserted into the riveting block 13. At this time, the first insulating member 12 is clamped between the limiting part 212 and the first wall surface 111. Finally, the riveting block 13 is riveted to the riveting part 211, thereby completing the fixation of the conductive electrode post 21.

[0053] Optionally, such as Figure 2 , Figure 5 As shown, the first insulating member 12 is also provided with a shaping extension 123. The shaping extension 123 is provided on the wall surface of the through structure 121 along the second direction, and the angle between the direction of the shaping extension 123 and the wall surface is an acute angle. By providing the shaping extension 123 in the through structure 121 of the first insulating member 12, and making the angle between the direction of the shaping extension 123 and the wall surface of the through structure 121 an acute angle, the direction of the shaping extension 123 can be in contact with the inclined surface of the tab 200 after it is gathered, thereby achieving the effect of gathering and fixing the gathered tab 200, improving the gathering state of the tab 200, and enhancing the gathering effect.

[0054] In this embodiment, the first insulating component 12 is a plastic part prepared by injection molding. Therefore, on the one hand, because its material is relatively soft, it can avoid hard contact with the tab 200, which would cause damage to the tab 200. On the other hand, because it also has insulation properties, it improves the insulation protection effect.

[0055] Optionally, such as Figure 1 , Figure 2 As shown, the battery casing also includes a sealing assembly 4, which includes a sealing plate 41 and an insulating plate 42. The sealing plate 41 is connected to the first wall surface 111 to seal the connection window 113. The insulating plate 42 is connected to the sealing plate 41 and is located between the sealing plate 41 and the tab 200. The insulating plate 42 is placed between the sealing plate 41 and the tab 200 to seal the connection window 113, preventing the tab 200 from contacting the first wall surface 111 of the casing body 11 and causing a short circuit, thereby enhancing the insulation protection.

[0056] It should also be noted that since the outer shell 11 is made of aluminum, the sealing plate 41 that seals the connection window 113 on the first wall 111 is also made of metal. After the electrode 200 and the connecting piece 22 are welded through the connection window 113 and the through structure 121, the sealing plate 41 is welded to the first wall 111, thereby connecting the first wall 111 and the sealing plate 41 into one unit, thus sealing the connection window 113. In this embodiment, the insulating plate 42 is a plastic part that is directly injection molded onto the sealing plate 41 by injection molding.

[0057] Optionally, such as Figure 2 , Figure 5As shown, the insulating plate 42 has a insertion groove 421 on the side facing away from the sealing plate 41, and the first insulating member 12 has an insertion protrusion 124 on the side facing the first wall surface 111. The insertion protrusion 124 is continuously arranged around the circumferential edge of the through structure 121 and is inserted into the insertion groove 421. By providing the insertion protrusion 124 on the first insulating member 12 and the insertion groove 421 on the insulating plate 42, and making the insertion groove 421 and the insertion protrusion 124 interlock, on the one hand, it is convenient to position and limit the insulating plate 42 and the first insulating member 12 during assembly, ensuring the accuracy of the installation position. On the other hand, since both the insulating plate 42 and the first insulating member 12 are insulating, multiple insulation is achieved by using the interlocking of the insertion protrusion 124 and the insertion groove 421, increasing the insulation distance.

[0058] The wall surface of the insertion groove 421 is adapted to the shape of the insertion protrusion 124. The shape of the insertion protrusion 124 can be freely selected according to actual needs. The insertion protrusion 124 with a rectangular cross-section can be used, or the insertion protrusion 124 with a serrated cross-section can be used.

[0059] Optionally, such as Figure 3 , Figure 4 As shown, the first wall surface 111 has a mounting boss 114 on the side away from the receiving cavity. The mounting boss 114 has mounting through holes 115 that communicate with the connecting window 113 and are distributed in a stepped manner, so as to form a limiting step 116 between the mounting through hole 115 and the connecting window 113. The sealing plate 41 includes a sealing part 411 and a plug-in part 412. The sealing part 411 is inserted into the mounting through hole 115 and abuts against the limiting step 116. The plug-in part 412 is inserted into the connecting window 113. The insulating plate 42 is provided on the side of the plug-in part 412 away from the sealing part 411. By setting a mounting boss 114 on the side of the first wall 111 away from the receiving cavity, and opening mounting through holes 115 on the mounting boss 114 that communicate with the connecting window 113 and are distributed in a stepped manner, the installation position of the sealing plate 41 is raised. On the one hand, more installation space is reserved for the electrode 200, which facilitates the subsequent welding of the electrode 200 and the connecting piece 22. On the other hand, the installation position of the electrode 200 in the height direction is improved, thereby further reducing the additional space occupied by the electrode 200 in the receiving cavity and further improving the space utilization rate.

[0060] In this embodiment, the mounting boss 114 is made by stamping the first wall surface 111. The shape of the mounting boss 114 is adapted to the shape of the connecting window 113. The shape of the connecting window 113 can be different types such as polygon, circle or ellipse. Its specific form can be freely selected according to actual needs. In this embodiment, the connecting window 113 is rectangular, so the mounting boss 114 is also rectangular.

[0061] Optionally, such as Figure 7 , Figure 8 As shown, the connecting piece 22 includes a first connecting portion 221 and a second connecting portion 222. The first connecting portion 221 is connected to the conductive electrode post 21, and the second connecting portion 222 is connected to the tab 200. The surface of the first connecting portion 221 facing the first wall surface 111 is lower than the surface of the second connecting portion 222 facing the first wall surface 111, thus forming a connecting piece 22 with a Z-shaped cross-section. By making the surface of the second connecting portion 222 higher than the surface of the first connecting portion 221, the connection position of the tab 200 is raised using the second connecting portion 222, thereby further reducing the additional space occupied by the tab 200 in the receiving cavity and further improving the space utilization rate.

[0062] Optionally, such as Figure 9 , Figure 10 As shown, the connecting piece 22 includes a first connecting portion 221 and a second connecting portion 222. The first connecting portion 221 is connected to the conductive electrode post 21, and the second connecting portion 222 is connected to the electrode tab 200. The surface of the first connecting portion 221 facing the first wall surface 111 and the surface of the second connecting portion 222 facing the first wall surface 111 are flush, forming a connecting piece 22 with a straight cross-section. By making the surfaces of the first connecting portion 221 and the second connecting portion 222 flush, the connecting piece 22 becomes a flat plate structure, which facilitates the processing and preparation of the connecting piece 22, reduces processing steps, and lowers processing costs.

[0063] Optionally, such as Figure 7 , Figure 9 As shown, a through slot 223 is provided on the second connecting part 222, through which the electrode tab 200 passes and connects to the second connecting part 222. By providing the through slot 223 on the second connecting part 222, the shortest path is provided for the electrode tab 200 to pass over the connecting piece 22, thereby reducing the length of the electrode tab 200, reducing the space occupied by the electrode tab 200, and improving space utilization.

[0064] Since the connecting piece 22 has different cross-sectional shapes, it can have various combinations depending on whether or not a through groove 223 is formed on the connecting piece 22 to cooperate with it. For example, Figure 10 As shown, the connecting piece 22 with a straight cross-section does not have a through slot 223, as... Figure 9 As shown, the connecting piece 22 with a straight cross-section has a through slot 223, as... Figure 8 As shown, the connecting piece 22 with a Z-shaped cross-section does not have any through-holes or, as shown in the image, ... Figure 7As shown, the connecting piece 22 with a Z-shaped cross-section has through slots 223, etc. In addition, the connecting piece 22 and the conductive electrode post 21 can be integrally formed by molding process, or the connecting piece 22 and the conductive electrode post 21 can be made separately and then welded together during assembly.

[0065] In this embodiment, the connecting piece 22 and the conductive electrode post 21 are separate structures, and the connecting piece 22 adopts a Z-shaped cross-section and has a through slot 223.

[0066] Optionally, such as Figure 3 , Figure 5 As shown, at least two anti-rotation through holes 117 are provided on the first wall surface 111, and anti-rotation protrusions 125 corresponding to the anti-rotation through holes 117 are provided on the first insulating member 12. The anti-rotation protrusions 125 are inserted into the anti-rotation through holes 117. By providing anti-rotation protrusions 125 on the first insulating member 12 and providing anti-rotation through holes 117 on the first wall surface 111, the accuracy of the relative position between the first insulating member 12 and the first wall surface 111 after assembly is ensured, and relative misalignment between the first insulating member 12 and the first wall surface 111 is avoided, which would affect the insulation protection of the first insulating member 12 for the first wall surface 111.

[0067] The anti-rotation protrusion 125 is adapted to the shape of the anti-rotation through hole 117. The anti-rotation through hole 117 can be a circular hole, an elliptical hole, or a polygonal hole. In this embodiment, the anti-rotation through hole 117 is a circular hole, so the anti-rotation protrusion 125 is a cylindrical protrusion.

[0068] Optionally, such as Figure 11 As shown, the battery casing also includes an insulating protective film 5 and at least one protective side plate 6 connected to the insulating protective film 5. The insulating protective film 5 covers the surface of the electrode assembly 100 where the tabs 200 are not provided. By covering the surface of the electrode assembly 100 where the tabs 200 are not provided with the insulating protective film 5 connected to at least one protective side plate 6, the surface of the electrode assembly 100 where the tabs 200 are not provided with the insulating protective film 5 is protected.

[0069] In this embodiment, the insulating protective film 5 is a polyester film, and the number of protective side plates 6 can be one, two, three, or four. The specific number can be adjusted according to the different protective requirements. In this embodiment, a total of four protective side plates 6 are provided. Before the electrode assembly 100 is covered with the polyester film, four protective side plates 6 are first heat-fused onto the polyester film, so that when the polyester film is covered on the electrode assembly 100, it can achieve four-sided protection of the electrode assembly 100, avoiding damage when the electrode assembly 100 is inserted into the shell and reducing the product yield.

[0070] In this embodiment, as Figure 11As shown, a battery is also provided, which includes an electrode assembly 100 and the aforementioned battery casing, with the electrode assembly 100 disposed within a receiving cavity of the battery casing. By using the aforementioned battery casing, the volume of the electrode assembly 100 can be further increased, thereby improving the energy density of the battery and increasing its power supply capacity.

[0071] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery casing, characterized in that, The battery casing includes: The housing assembly includes an outer shell body and a first insulating member. The outer shell body includes a first wall surface and a plurality of second walls surface perpendicular to the first wall surface. The plurality of second walls surface are arranged around the periphery of the first wall surface to form a hollow housing structure with one side open. A connection window is provided on the first wall surface. The first insulating member is provided on the side of the first wall surface opposite to the opening and has a through structure communicating with the connection window. The first insulating member also has fixing bosses on both sides along the first direction that abut against the pole group. A conductive component includes a conductive electrode post and a connecting piece. One end of the conductive electrode post is fixed to the first wall surface, and the other end of the conductive electrode post extends into the outer shell body and is connected to the connecting piece. The side of the connecting piece facing away from the conductive electrode post extends along the first direction to below the through structure. The tab on one side of the electrode group is connected to the side of the connecting piece facing the first wall surface and is located below the through structure. A cover plate assembly includes a cover plate body and an independent pole. The cover plate body is located at the opening of the outer shell body to close the outer shell body and form a receiving cavity for accommodating the pole group. One end of the independent pole is fixed to the cover plate body, and the other side of the independent pole extends into the receiving cavity. The pole tab on the other side of the pole group is connected to the side of the independent pole facing the pole group.

2. The battery casing according to claim 1, characterized in that, The first insulating member is further provided with a shaping extension edge, which is provided on the wall surface of the through structure on any side of the second direction, and the angle between the direction of the shaping extension edge and the wall surface is an acute angle.

3. The battery casing according to claim 1, characterized in that, The battery casing also includes a sealing assembly, which includes a sealing plate and an insulating plate. The sealing plate is connected to the first wall surface to seal the connection window, and the insulating plate is connected to the sealing plate and located between the sealing plate and the tab.

4. The battery casing according to claim 3, characterized in that, The insulating plate has a insertion groove on the side away from the sealing plate, and the first insulating member has an insertion protrusion on the side facing the first wall. The insertion protrusion is continuously arranged around the circumferential edge of the through structure and is inserted into the insertion groove.

5. The battery casing according to claim 3, characterized in that, The first wall surface has a mounting boss on the side away from the receiving cavity. The mounting boss has mounting through holes that communicate with the connecting window and are distributed in a stepped manner to form a limiting step between the mounting through holes and the connecting window. The sealing plate includes a sealing part and a plug-in part. The sealing part is inserted into the mounting through hole and abuts against the limiting step. The plug-in part is inserted into the connecting window. The insulating plate is located on the side of the plug-in part away from the sealing part.

6. The battery casing 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 conductive electrode post, and the second connecting portion is connected to the electrode tab. The surface of the first connecting portion facing the first wall is lower than the surface of the second connecting portion facing the first wall, so as to form the connecting piece with a Z-shaped cross-section. Alternatively, the surface of the first connecting portion facing the first wall is flush with the surface of the second connecting portion facing the first wall, so as to form the connecting piece with a straight cross-section.

7. The battery casing according to claim 6, characterized in that, The second connecting part has a through groove, and the electrode tab passes through the through groove to connect with the second connecting part.

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

9. The battery casing according to claim 1, characterized in that, The battery casing also includes an insulating protective film and at least one protective side plate connected to the insulating protective film, the insulating protective film covering the surface of the electrode assembly where the tabs are not provided.

10. A battery, characterized in that, The battery includes an electrode assembly and a battery housing as described in any one of claims 1-9, wherein the electrode assembly is disposed within the receiving cavity of the battery housing.

Images