Battery casing and battery

Abstract

The present invention belongs to the field of battery technology and discloses a battery housing and a battery. The battery housing includes a housing body, a cover assembly, a fixed end plate with an avoidance groove, and a conductive assembly. The cover assembly includes a cover body with a connection window and a first insulating member with a through structure. The conductive assembly includes a pole and a connecting piece. The two ends of the pole are respectively connected to the cover body and the connecting piece. The connecting piece is arranged between the first insulating member and the fixed end plate and extends to the bottom of the through structure. The pole tab is connected to the connecting piece and is located below the through structure. Connecting the pole tab and the connecting piece in the area below the through structure not only saves the space occupied by the pole tab being bent multiple times, but also allows a portion of the pole tab to overlap with the cover assembly in space, reducing space occupation and improving space utilization. In addition, the first insulating member and the fixed end plate enclose a space for insulating and protecting the connecting piece, thereby improving insulation protection performance.

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 stations, cover bodies, 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 to achieve current conduction.

[0003] In traditional battery covers, the poles need to pass through the upper plastic, the cover body and the lower plastic, extend into the accommodating cavity and be welded to the pole ears. In order to facilitate the welding of the pole ears and the poles, 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 poles 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 bend 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 that can be used by 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, comprising:

[0008] The outer shell body is a hollow shell structure with two sides open;

[0009] A cover plate assembly, comprising a cover plate body and a first insulating member. The cover plate body is disposed at the openings on both sides of the outer shell body, closing the outer shell body to form an accommodating cavity for accommodating the electrode group. The cover plate body is provided with a connecting window. The first insulating member is provided on a side of the cover plate body facing the accommodating cavity and has a through structure communicating with the connecting window.

[0010] At least one fixed end plate, at least one of the fixed end plates is disposed in the accommodating cavity and is located on a side of the pole group where the pole lug is provided, 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 includes a closing assembly, which includes 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 tab.

[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 into 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. 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 provided on the side of the plug-in portion facing away from the closing portion.

[0016] 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 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.

[0017] Optionally, a through-groove is provided on the second connecting portion, and the tab passes through the through-groove 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 one-to-one to the anti-rotation protrusions 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 includes an insulating protective film and at least one protective side plate connected to the insulating protective film, and 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 is provided with a connection window on the cover plate body on both sides of the shell body, a through structure on the first insulating member, an avoidance groove for the pole ear to pass through, 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 space occupied by the pole ears on both sides in the accommodating cavity and improving space utilization. In addition, the connecting piece is placed between the first insulating member and the fixed end plate, so that the first insulating member and the fixed end plate jointly 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, by applying the above-mentioned battery casing, can further increase the volume of the electrode group due to the increase in internal space, 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 the 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 This is a schematic structural diagram of the cover 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 This is a schematic structural diagram of the first insulating member in the battery housing provided by the present invention;

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

[0030] Figure 7 Schematic diagram of a Z-shaped cross-section connecting piece provided with a through-groove in a battery housing provided by the present invention;

[0031] Figure 8 Schematic diagram of a Z-shaped cross-section connecting piece in a battery housing provided by the present invention without a through groove;

[0032] Figure 9 Schematic diagram of a straight cross-section connecting piece provided with a through-groove in a battery housing provided by the present invention;

[0033] Figure 10 Schematic diagram of a straight cross-section connecting piece without a through groove in a battery housing provided by the present invention;

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

[0035] In the picture:

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

[0037] 1. Shell body;

[0038] 2. Cover assembly; 21. Cover 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-hole structure; 222. Inserting boss; 223. Anti-rotation boss; 23. Riveting block; 24. Second insulating member;

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

[0040] 4. Conductive assembly; 41. Pole; 411. Riveted portion; 412. Positioning 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. Connecting portion; 52. Insulating plate; 521. Connecting groove;

[0042] 6. Insulation protective film;

[0043] 7. Protective side panels. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0045] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0046] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0047] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0048] Because traditional batteries require the tabs on both sides of the electrode group to be bent multiple times to form an S-shape before they can be conveniently connected to the pole, the tabs on both sides of the electrode group occupy a large amount of space in the accommodation cavity, which not only has poor space utilization, but also greatly compresses the space available for the electrode group, resulting in low energy density.

[0049] Therefore, in order to reduce the space occupied by the tabs on both sides of the electrode group in the accommodating cavity, improve space utilization, increase the space that can be used by the electrode group, and improve energy density, this embodiment provides a battery housing.

[0050] like Figures 1 to 10 As shown, the battery housing includes a housing body 1, a cover assembly 2, at least one fixed end plate 3 and a conductive component 4. The housing body 1 is a hollow shell structure with two open sides. The cover assembly 2 includes a cover body 21 and a first insulating member 22. The cover body 21 is provided at the open 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 the side of the cover body 21 facing the receiving cavity and is provided with a through structure 221 communicating with the connecting window 211. At least one fixed end plate 3 is provided in the receiving cavity and 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 provided 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 facing away from the accommodating cavity, and 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 facing 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 shell is provided with a connection window 211 on the cover body 21 on both sides of the shell body 1, a through structure 221 is provided on the first insulating member 22, and an avoidance groove 31 for the pole ear 200 to pass through is provided on the fixed end plate 3, and the 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. On one side of the electrode group 100, the space occupied by the multiple bending of the electrode ears 200 on both sides in the accommodating cavity is saved, and a part of the electrode ears 200 on both sides of the electrode group 100 is spatially overlapped with the cover plate assembly 2 located on both sides of the shell body 1, thereby reducing the space occupied by the electrode ears 200 on both sides in the accommodating cavity and improving space utilization. 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 that are connected. 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 raised 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 riveted. In addition to the cover body 21 and the first insulating member 22, the cover assembly 2 also includes a rivet block 23 and a second insulating member 24. The second insulating member 24 is located on the side of the cover body 21 facing away from the first insulating member 22. The first and second insulating members 22 and 24 provide insulation protection for both sides of the cover body 21. The rivet block 23 is located on the side of the second insulating member 24 facing away from the cover body 21. The pole 41 includes a rivet portion 411 and a stopper portion 412. When securing the pole 41, the rivet portion 411 of the pole 41 sequentially passes through the first insulating member 22, the cover body 21, and the second insulating member 24, and is inserted into the rivet block 23. The first insulating member 22 is then sandwiched between the stopper portion 412 and the cover body 21. Finally, the rivet block 23 is riveted to the rivet portion 411, thereby securing 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 provided in the battery casing, respectively located on both sides of the pole group 100 with the pole ear 200.

[0055] Alternatively, as Figure 2 、 Figure 6 As shown, the fixed end plate 3 is further provided with a shaping extension 32, which is provided on the wall surface on either side of the avoidance groove 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 groove 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 groove 31 an acute angle, the extension direction of the shaping extension 32 can be aligned with the inclined surface of the tab 200 after it is folded, thereby folding and fixing the tab 200 after it is folded, improving the folding state of the tab 200, and enhancing the folding effect.

[0056] In this embodiment, the fixed end plate 3 and the first insulating part 22 are both components separately molded 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. The sealing plate 51 is connected to the cover body 21 to seal the connection window 211. 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 provided between the sealing plate 51 sealing the connection window 211 and the tab 200 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 that closes the connection window 211 on the cover body 21 is also made of metal. After the electrode ear 200 and the connecting piece 42 are welded through the connection 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 one, thereby achieving sealing of the connection window 211. In this embodiment, the insulating plate 52 is a plastic part directly injection molded on the closing plate 51 through an injection molding process.

[0059] Alternatively, as Figure 2 、 Figure 5 As shown, the insulating plate 52 has an insertion groove 521 on the side facing away from the closing plate 51, and the first insulating member 22 has an insertion protrusion 222 on the side facing the cover body 21. The insertion protrusions 222 are continuously arranged around the circumferential edge of the through-structure 221 and are inserted into the insertion groove 521. Providing the insertion protrusions 222 on the first insulating member 22 and the insertion groove 521 on the insulating plate 52, and inserting the insertion groove 521 into the insertion protrusions 222, not only facilitates positioning and limiting the insulating plate 52 and the first insulating member 22 during assembly, ensuring accurate installation. Furthermore, because both the insulating plate 52 and the first insulating member 22 are insulating, the insertion of the insertion protrusions 222 into the insertion groove 521 achieves multiple insulation, increases insulation distance, prevents short circuits between the closing plate 51, the cover body 21, and the metal parts inside the battery housing, and improves 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. The plug-in protrusion 222 with a rectangular cross-section shape can be used, or the plug-in protrusion 222 with a serrated cross-section shape can be used.

[0061] Alternatively, as 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 is opened on the mounting boss 212 and is connected to the connecting window 211 and is distributed in a stepped manner, so as 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 provided 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 on the mounting boss 212 that are connected to the connecting window 211 and are distributed in a stepped manner, the installation position of the closing plate 51 is elevated. On the one hand, more installation space is reserved for the tab 200, thereby facilitating the subsequent welding of the tab 200 and the connecting piece 42. On the other hand, the installation position of the tab 200 in the height direction is improved, thereby further reducing the additional space occupied by the tab 200 in the accommodating cavity, thereby further improving the space utilization rate.

[0062] In this embodiment, the mounting boss 212 is made by a stamping process on the cover body 21, 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, as Figure 7 、 Figure 8 As 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, and the second connecting portion 422 is connected to the tab 200. 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, thereby forming 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 second connecting portion 422 is used to elevate the connection position of the tab 200, thereby further reducing the additional space occupied by the tab 200 in the accommodating cavity, thereby further improving space utilization.

[0064] Alternatively, as Figure 9 、 Figure 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, and the second connecting portion 422 is connected to the pole tab 200. 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, thereby forming a connecting piece 42 with a straight cross-section. By aligning the surfaces of the first connecting portion 421 and the second connecting portion 422, the connecting piece 42 is formed into a flat plate structure, which facilitates the processing and preparation of the connecting piece 42, reduces the processing steps, and reduces processing costs.

[0065] Alternatively, as Figure 7 、 Figure 9 As shown, the second connecting portion 422 is provided with a through slot 423, and the tab 200 passes through the through slot 423 to connect with the second connecting portion 422. By providing the through slot 423 on the second connecting portion 422, the tab 200 is provided with the shortest path to pass over the connecting sheet 42, thereby reducing the length of the tab 200, reducing the space occupied by the tab 200, and improving space utilization.

[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 opened on the connecting piece 42. For example, Figure 10 As shown, the connecting piece 42 with a straight cross section does not have a through groove 423. Figure 9 As shown, the connecting piece 42 with a straight cross section is provided with a through slot 423. 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 through a molding process, or the connecting piece 42 and the pole 41 can be prepared separately and then welded together 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, as Figure 3 、 Figure 5As shown, the first insulating member 22 is provided with at least two anti-rotation protrusions 223 on the side facing the cover body 21. The cover body 21 is provided with anti-rotation through-holes 215 corresponding one-to-one with the anti-rotation protrusions 223, 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 the anti-rotation through-holes 215 on the cover body 21, the relative position between the first insulating member 22 and the cover body 21 is accurately guaranteed after assembly, preventing relative displacement between the first insulating member 22 and the cover body 21, which could affect the insulation protection of the first insulating member 22 for 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, as Figure 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. The insulating protective film 6 covers the surface of the electrode group 100 that is not provided with the electrode tab 200. By covering the surface of the electrode group 100 that is not provided with the electrode tab 200 with the insulating protective film 6 connected to the at least one protective side plate 7, the surface of the electrode group 100 that is not provided with the electrode tab 200 is protected.

[0071] In this 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. The specific number is adjusted according to the different protection requirements. In this embodiment, there are four protective side plates 7. Before the electrode group 100 is coated with the polyester film, four protective side plates 7 are first hot-melt on the polyester film, so that when the polyester film is coated on the electrode group 100, the electrode group 100 is protected on all four sides, avoiding damage when the electrode group 100 is put into the shell, thereby reducing the product yield.

[0072] In this embodiment, if Figure 11 As shown, a battery is also provided, comprising an electrode assembly 100 and the aforementioned battery housing, wherein the electrode assembly 100 is disposed within a receiving cavity of the battery housing. By utilizing the aforementioned battery housing, the volume of the electrode assembly 100 is further increased, thereby improving the battery's energy density and increasing the battery's power supply capacity.

[0073] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection 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, comprising a cover plate body and a first insulating member. The cover plate body is disposed at the openings on both sides of the outer shell body, closing the outer shell body to form an accommodating cavity for accommodating the electrode group. The cover plate body is provided with a connecting window. The first insulating member is provided on a side of the cover plate body facing the accommodating cavity and has a through structure communicating with the connecting window. At least one fixed end plate, at least one of the fixed end plates is disposed in the accommodating cavity and is located on a side of the pole group where the pole lug is provided, and the fixed end plate is provided with an avoidance groove communicating with the through structure; A conductive assembly, the conductive assembly comprising a pole and a connecting piece, one end of the pole being fixed to a side of the cover body facing away from the accommodating cavity, the connecting piece being connected to the other end of the pole extending into the accommodating cavity and being located between the first insulating member and the fixed end plate, the side of the connecting piece facing away from the pole extending along a first direction to below the through-structure, the pole lug of the pole group being connected to a side of the connecting piece facing the cover body and being located below the through-structure; The battery housing further includes a sealing assembly, 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.

2. The battery housing according to claim 1, wherein: The fixed end plate is further provided with a shaping extension, which 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.

3. The battery housing according to claim 1, wherein: The insulating plate is provided with an inserting groove on the side facing away from the closing plate, and the first insulating member is provided with an inserting protrusion on the side facing the cover plate body. The inserting protrusion is continuously arranged around the circumferential edge of the penetrating structure, and the inserting protrusion is inserted in the inserting groove.

4. The battery housing according to claim 1, wherein: 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 provided on the side of the plug-in portion facing away from the closing portion.

5. The battery housing according to claim 1, wherein: The connecting piece includes a first connecting portion and a second connecting portion, the first connecting portion is connected to the pole, and 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.

6. The battery housing according to claim 5, characterized in that The second connecting portion is provided with a through-groove, and the tab passes through the through-groove and is connected to the second connecting portion.

7. The battery housing according to claim 1, wherein: At least two anti-rotation protrusions are provided on a side of the first insulating member facing the cover body. 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.

8. The battery housing according to claim 1, wherein: 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.

9. A battery, characterized in that The battery comprises a pole group and a battery casing according to any one of claims 1 to 8, wherein the pole group is arranged in the accommodating cavity of the battery casing.

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