Shell structure and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a shell structure and a battery, the shell structure comprises a shell body, the shell body is formed by bending plates in an end-to-end mode, and a welding seam is formed in the overlapping area of the plates in a welding mode; the shell body is provided with two first wall plates which are oppositely arranged in the Y direction and two second wall plates which are oppositely arranged in the X direction, and the distance between the two second wall plates is larger than that between the two first wall plates; a welding seam is formed on one of the second wall plates; the shell body is hollow to form a shell inner cavity; the at least one reinforcing rib is arranged at the intersection position of the first wall plate and the second wall plate and located in the shell inner cavity, and the reinforcing rib is at least located on the side, where the welding seam is formed, of the second wall plate. According to the shell structure provided by the utility model, the overall structural strength of the shell structure can be enhanced, an exhaust channel in the battery is improved, an exhaust gap is ensured to be formed between the pole group and the shell, and the pole group is prevented from being scratched by a welding seam in the shell body.

Description

Technical Field

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

[0002] Power batteries generally include an internal battery structure and an external battery structure. The internal battery structure mainly includes the electrode group, and the external battery structure mainly includes the cover plate and the shell. The shell provides a space for the electrode group, and the cover plate and the shell are welded together to form a closed space, thereby forming a complete battery structure. Taking the blade battery as an example, during the molding process of the shell, the plate is usually bent first, and then the overlapping area of ​​the plate is formed by laser welding.

[0003] However, in pursuit of lightweight, the wall thickness of the battery cell shell is often made thinner, which leads to lower shell strength and easily causes the battery shell to bend and deform in length, seriously affecting battery performance; and the shell welds are prone to scratching the electrode group, posing certain safety hazards. Utility Model Content

[0004] In view of this, the utility model provides a shell structure and a battery to solve the problem that the shell wall thickness is too thin and easily causes the shell to deform, and the weld of the shell is easy to scratch the electrode group.

[0005] In a first aspect, the utility model provides a housing structure, comprising:

[0006] The shell body is formed by bending the plate to form a shell structure connected end to end, and the overlapping area of ​​the plate is welded to form a weld; the shell body has two first wall plates arranged opposite to each other along the Y direction, and two second wall plates arranged opposite to each other along the X direction, wherein the spacing between the two second wall plates is greater than the spacing between the two first wall plates; the weld is formed on one of the second wall plates; the shell body is hollow inside to form a shell cavity;

[0007] At least one reinforcing rib is arranged at the intersection of the first wall plate and the second wall plate and is located in the shell inner cavity, and the reinforcing rib is at least located on one side of the second wall plate formed with the weld.

[0008] Beneficial effects: The shell structure provided by the utility model is provided with reinforcing ribs at the intersection of the first wall plate and the second wall plate, the reinforcing ribs are located in the inner cavity of the shell, and the reinforcing ribs are located at least on one side of the second wall plate formed with the weld; thereby, the overall structural strength of the shell structure, especially the strength at the edges of the shell body and the weld position, can be enhanced; at the same time, by providing the reinforcing ribs, the internal exhaust channel of the battery can be improved, and an exhaust gap can be ensured to be formed between the pole group and the shell, thus avoiding deformation of the channel, ensuring gas circulation inside the battery, and improving safety performance; in addition, since the reinforcing ribs are located at least on one side of the second wall plate formed with the weld, scratches on the pole group caused by the weld inside the shell body can be avoided, thus ensuring the integrity of the pole group.

[0009] In an optional embodiment, the number of the reinforcing ribs is four, and a reinforcing rib is provided at the intersection of every two adjacent first wall panels and the second wall panels.

[0010] Beneficial effect: By making the number of reinforcing ribs four, reinforcing ribs are provided at the intersection of every two adjacent first wall panels and second wall panels, so that the entire shell body can be strengthened. At the same time, the four reinforcing ribs can respectively support the internal pole groups, making the supporting effect more uniform and avoiding scratches on the battery cell pole groups by the inner welds.

[0011] In an optional embodiment, the plane where the first wall plate is located and the plane where the second wall plate is located are both parallel to the Z direction, and the Z direction is perpendicular to the X direction and the Y direction at the same time;

[0012] The extending direction of the reinforcing rib is parallel to the Z direction, and the extending length of the reinforcing rib is not shorter than 90% of the extending length of the first wall panel.

[0013] Beneficial effect: By making the extension direction of the reinforcing rib parallel to the Z direction and making the extension length of the reinforcing rib not shorter than 90% of the extension length of the first wall plate, it is possible to ensure that the reinforcing rib has sufficient support for the shell body and ensure the structural strength.

[0014] In an optional embodiment, a through hole is formed through the interior of the reinforcing rib, and an extension direction of the through hole is parallel to an extension direction of the reinforcing rib.

[0015] Beneficial effect: The extension direction of the through hole is parallel to the extension direction of the reinforcing rib, so that the through hole runs through the entire reinforcing rib, thereby ensuring smoother exhaust inside the shell structure, reducing the risk of thermal runaway of the battery, and further ensuring battery safety.

[0016] In an optional embodiment, the dimension of the reinforcing rib along the Y direction is a, wherein a satisfies: 1.5 mm ≤ a ≤ 3.5 mm;

[0017] The dimension of the reinforcing rib along the X direction is b, where b satisfies: 1.5 mm ≤ b ≤ 3.5 mm.

[0018] Beneficial effect: By limiting the upper limit of the dimension a of the reinforcing rib along the Y direction and the dimension b of the reinforcing rib along the X direction, the reinforcing rib can be prevented from occupying too much space inside the shell body and affecting the capacity of the electrode group. By limiting the lower limit, the structural strength can be ensured and the weld inside the shell body can be prevented from scratching the electrode group.

[0019] In an optional embodiment, the dimension a of the reinforcing rib along the Y direction is equal to the dimension b of the reinforcing rib along the X direction.

[0020] In an optional embodiment, the reinforcing rib is formed with an abutting surface arranged at an angle with the first wall plate and the second wall plate, and the reinforcing rib is also provided with a through groove in a direction perpendicular to the abutting surface, and the through groove is connected with the through hole;

[0021] The dimension of the through slot along the Z direction is n, where n satisfies: 0.5 mm ≤ n ≤ 20 mm;

[0022] The through groove is located in the plane where the abutment surface is located and has a dimension m perpendicular to the Z direction, where m satisfies: 1 mm ≤ m ≤ 2.5 mm;

[0023] The reinforcing rib is provided with a plurality of through grooves at intervals along the Z direction, and the interval between two adjacent through grooves along the Z direction is k, wherein k satisfies: k≥1mm.

[0024] Beneficial effect: By opening a through groove in the direction perpendicular to the abutting surface and connecting the through groove with the through hole, the reinforcing rib can be used as a flow airway between the inside and outside of the shell. This airway structure will greatly increase the gas circulation inside the battery and improve the problem of thermal runaway inside the battery.

[0025] In an optional implementation, the abutting surface is located in its own plane and has a dimension d perpendicular to the Z direction, wherein d satisfies: 2.12 mm≤d≤4.95 mm.

[0026] In an optional embodiment, the weld is formed with protrusions on both sides perpendicular to the plane where the second wall plate is located, and the weld includes a first weld facing the shell inner cavity and a second weld facing away from the shell inner cavity;

[0027] The protrusion height of the first weld along the X direction is D1, where D1 satisfies: 0mm≤D1≤0.15mm;

[0028] The protrusion height of the second weld along the X direction is D2, where D2 satisfies: 0mm≤D2≤0.05mm;

[0029] The width of the first weld and / or the second weld along the Y direction is L, wherein L satisfies: 0.5 mm ≤ L ≤ 1 mm.

[0030] Beneficial effect: By limiting the upper limit of the protrusion height D1 of the first weld along the X direction, the risk of scratching the electrode group caused by the internal weld can be reduced, and by limiting the upper limit of the protrusion height D2 of the second weld along the X direction, the problem of interference between adjacent batteries and between batteries and other components can be avoided.

[0031] In a second aspect, the utility model further provides a battery, comprising: a shell structure as described above, and a pole group arranged inside the shell structure; the pole group is suitable for abutting against the reinforcing rib so that the weld between the pole group and the second wall plate is spaced apart to avoid scratches on the pole group caused by the weld.

[0032] Since the battery includes a shell structure, it has the same effect as the shell structure and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 This is an exploded schematic diagram of the battery of the utility model;

[0035] Figure 2 It is a side view of the housing structure of the utility model;

[0036] Figure 3 for Figure 2 A magnified image of point A;

[0037] Figure 4 for Figure 2 A partial enlarged view of

[0038] Figure 5 for Figure 4 Partial schematic diagram of the BB section.

[0039] Description of reference numerals:

[0040] 1. Cover plate; 2. Shell body; 3. Pole group; 201. First wall plate; 202. Second wall plate; 203. First weld; 204. Second weld; 21. Reinforcing rib; 211. Abutment surface; 22. Through hole; 23. Through groove; 24. Shell inner cavity. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] Power batteries generally include an internal battery structure and an external battery structure. The internal battery structure mainly includes the electrode group, and the external battery structure mainly includes the cover plate and the shell. The shell provides a space for the electrode group, and the cover plate and the shell are welded together to form a closed space, thereby forming a complete battery structure. Taking the blade battery as an example, during the molding process of the shell, the sheet is usually bent first, and then the overlapping area of ​​the sheet is formed by laser welding. However, the weld of the shell is easy to scratch the electrode group, which poses a certain safety hazard.

[0046] In addition, in pursuit of lightweight, the wall thickness of the battery cell shell is often made thinner, which leads to lower shell strength. When the battery has thermal runaway, the battery cell shell is prone to rupture, causing battery failure and safety accidents. Due to the thin wall thickness of the shell, it is easy to cause shell deformation and poor shell opening surface, which seriously affects the assembly efficiency of the cover and shell. The unevenness of the shell will also affect the gas path inside the battery, which is easy to cause poor exhaust during heat spread, posing a safety hazard.

[0047] The shell structure provided in the embodiment of the utility model can prevent the weld inside the shell from scratching the pole group, and can ensure the structural strength of the shell to avoid rupture during thermal runaway.

[0048] Combine the following Figures 1 to 5 , describing an embodiment of the utility model.

[0049] According to an embodiment of the present utility model, on the one hand, a housing structure is provided, comprising:

[0050] The shell body 2 is formed by bending a plate to form a shell structure connected end to end, and the overlapping area of ​​the plate is welded to form a weld; the shell body 2 has two first wall plates 201 arranged opposite to each other along the Y direction, and two second wall plates 202 arranged opposite to each other along the X direction, wherein the spacing between the two second wall plates 202 is greater than the spacing between the two first wall plates 201; the weld is formed on one of the second wall plates 202; the shell body 2 is hollow inside to form a shell cavity 24;

[0051] At least one reinforcing rib 21 is disposed at the intersection of the first wall plate 201 and the second wall plate 202 and is located in the shell inner cavity 24 , and the reinforcing rib 21 is at least located on one side of the second wall plate 202 where the weld is formed.

[0052] The shell body 2 of this embodiment can be made of metal material, such as aluminum or stainless steel.

[0053] The shell body 2 is formed into a shell structure connected end to end by bending the plate, and high-frequency welding or laser welding is performed at the intersection of the plates to form the shell body 2. A weld is formed in the overlapping area of ​​the plates after welding. Optionally, the weld formed by welding is located at the small face of the side of the shell body 2. In this embodiment, the weld can be located at the position of the second wall plate 202 on one side.

[0054] Specifically, the shell body 2 is formed by two first wall plates 201 and two second wall plates 202 connected end to end in sequence, a shell cavity 24 is formed inside the shell body 2, and openings are formed at both ends of the shell body 2 along the Z direction to accommodate the pole group 3.

[0055] The shell structure provided by the embodiment of the utility model is provided with a reinforcing rib 21 at the intersection of the first wall plate 201 and the second wall plate 202, the reinforcing rib 21 is located in the shell cavity 24, and the reinforcing rib 21 is at least located on one side of the second wall plate 202 formed with a weld; thereby, the overall structural strength of the shell structure, especially the strength at the edge of the shell body 2 and the weld position, can be enhanced; at the same time, by providing the reinforcing rib 21, the internal exhaust channel of the battery can be improved, and an exhaust gap can be ensured to be formed between the electrode group and the shell, thus avoiding deformation of the channel, ensuring gas circulation inside the battery, and improving safety performance; in addition, since the reinforcing rib 21 is at least located on one side of the second wall plate 202 formed with a weld, scratches on the electrode group 3 caused by the weld inside the shell body 2 can be avoided, thus ensuring the integrity of the electrode group 3.

[0056] In the related art, in order to avoid the problem of scratches on the electrode group by the weld, the blade battery needs to set a longer side plate structure on the contact surface of the electrode group and the weld side. The shell structure provided in this embodiment can eliminate the side plate structure, thereby reducing production costs.

[0057] In this embodiment, the length of the shell body 2 along the Z direction may range from 400 mm to 1000 mm, the width along the X direction may range from 80 mm to 150 mm, and the thickness along the Y direction may range from 12 mm to 20 mm. The wall thickness h of the shell body 2 ranges from 0.2 mm to 0.5 mm;

[0058] As a specific example, the length of the shell body 2 along the Z direction is 500 mm, the width along the X direction is 120 mm, and the thickness along the Y direction is 16 mm. The wall thickness of the shell body 2 is 0.35 mm.

[0059] In some embodiments, in combination Figure 2 As shown, the number of the reinforcing ribs 21 is four, and a reinforcing rib 21 is provided at the intersection of every two adjacent first wall panels 201 and second wall panels 202 .

[0060] By making the number of reinforcing ribs 21 four, reinforcing ribs 21 are provided at the intersection of every two adjacent first wall panels 201 and second wall panels 202, so that the entire shell body 2 can be strengthened. At the same time, the four reinforcing ribs 21 can respectively support the internal pole group 3, making the supporting effect more uniform and avoiding scratches on the battery cell pole group by the inner weld.

[0061] In some embodiments, in combination Figure 1 As shown, the plane where the first wall plate 201 and the plane where the second wall plate 202 are located are both parallel to the Z direction, and the Z direction is perpendicular to the X direction and the Y direction at the same time;

[0062] The extending direction of the reinforcing rib 21 is parallel to the Z direction, and the extending length of the reinforcing rib 21 is not shorter than 90% of the extending length of the first wall plate 201 .

[0063] By making the extension direction of the reinforcing rib 21 parallel to the Z direction and making the extension length of the reinforcing rib 21 not shorter than 90% of the extension length of the first wall plate 201 , it is possible to ensure that the reinforcing rib 21 has sufficient support for the shell body 2 and ensure structural strength.

[0064] In some embodiments, in combination Figure 3 As shown, a through hole 22 is formed through the reinforcing rib 21 , and an extending direction of the through hole 22 is parallel to an extending direction of the reinforcing rib 21 .

[0065] The extension direction of the through hole 22 is parallel to the extension direction of the reinforcing rib 21, so that the through hole 22 passes through the entire reinforcing rib 21, thereby ensuring smoother exhaust inside the shell structure, reducing the risk of thermal runaway of the battery, and further ensuring battery safety.

[0066] Optionally, the cross-sectional shape of the through hole 22 matches the cross-sectional shape of the reinforcing rib 21 .

[0067] As a variation, a plurality of through holes 22 may be formed through the reinforcing rib 21 .

[0068] In some embodiments, in combination Figure 3 As shown, the dimension of the reinforcing rib 21 along the Y direction is a, wherein a satisfies: 1.5 mm ≤ a ≤ 3.5 mm;

[0069] The dimension of the reinforcing rib 21 along the X direction is b, wherein b satisfies: 1.5 mm≤b≤3.5 mm.

[0070] In some embodiments, the dimension a of the reinforcing rib 21 along the Y direction is equal to the dimension b of the reinforcing rib 21 along the X direction.

[0071] Optionally, the dimension a of the reinforcing rib 21 along the Y direction may be 1.5 mm, 2 mm, 2.5 mm, 3 mm, or 3.5 mm.

[0072] Optionally, the dimension b of the reinforcing rib 21 along the X direction may be 1.5 mm, 2 mm, 2.5 mm, 3 mm or 3.5 mm.

[0073] In this embodiment, the dimension a of the reinforcing rib 21 along the Y direction is equal to the dimension b of the reinforcing rib 21 along the X direction. Specifically, a=b=2.2 mm.

[0074] By limiting the upper limit of the dimension a of the reinforcing rib 21 along the Y direction and the dimension b of the reinforcing rib 21 along the X direction, it is possible to prevent the reinforcing rib 21 from occupying too much space inside the shell body 2 and affecting the capacity of the electrode group 3. By limiting the lower limit, the structural strength can be ensured, and the weld inside the shell body 2 can be prevented from scratching the electrode group 3.

[0075] In some embodiments, in combination Figure 4 , Figure 5 As shown, the reinforcing rib 21 is formed with an abutting surface 211 which is set at an angle with the first wall plate 201 and the second wall plate 202. In a direction perpendicular to the abutting surface 211, the reinforcing rib 21 is also provided with a through groove 23, and the through groove 23 is connected with the through hole 22;

[0076] The dimension of the through slot 23 along the Z direction is n, wherein n satisfies: 0.5 mm ≤ n ≤ 20 mm;

[0077] The through groove 23 is located in the plane where the abutting surface 211 is located and has a dimension m perpendicular to the Z direction, wherein m satisfies: 1 mm ≤ m ≤ 2.5 mm;

[0078] The reinforcing rib 21 is provided with a plurality of through slots 23 at intervals along the Z direction, and the interval between two adjacent through slots 23 along the Z direction is k, wherein k satisfies: k≥1 mm.

[0079] By opening a through groove 23 in the direction perpendicular to the abutting surface 211 and connecting the through groove 23 with the through hole 22, the reinforcing rib 21 can be used as a flow airway between the inside and outside of the shell. This airway structure will greatly increase the gas circulation inside the battery and improve the problem of thermal runaway inside the battery.

[0080] Optionally, the dimension n of the through slot 23 along the Z direction may be 0.5 mm, 1 mm, 3 mm, 5 mm, 10 mm or 15 mm.

[0081] As a specific example, the dimension n of the through slot 23 along the Z direction is 0.5 mm.

[0082] Optionally, the dimension m of the through slot 23 perpendicular to the Z direction may be 1 mm, 1.5 mm, 2 mm or 2.5 mm.

[0083] As a specific example, the dimension m of the through slot 23 perpendicular to the Z direction is 1.5 mm.

[0084] The reinforcing rib 21 is provided with a plurality of through slots 23 at intervals along the Z direction. The plurality of through slots 23 are evenly spaced. The interval between two adjacent through slots 23 along the Z direction is k. As a specific example, the interval k between two adjacent through slots 23 along the Z direction is 1.5 mm.

[0085] In this embodiment, the cross section of the through groove 23 is rectangular along the direction perpendicular to the abutting surface 211. As a variation, along the direction perpendicular to the abutting surface 211, the cross section of the through groove 23 can also be circular, elliptical, diamond or polygonal, and the above shapes can meet the requirements of increasing the shell strength and internal exhaust effect.

[0086] In some embodiments, in combination Figure 4 , Figure 5 As shown, the abutting surface 211 is located in its own plane and has a dimension d perpendicular to the Z direction, wherein d satisfies: 2.12 mm≤d≤4.95 mm.

[0087] The dimension d of the abutting surface 211 perpendicular to the Z direction can be obtained by the dimension a of the reinforcing rib 21 along the Y direction, the dimension b of the reinforcing rib 21 along the X direction, and the included angle.

[0088] As a specific example, the dimension d of the abutting surface 211 perpendicular to the Z direction is 3.11 mm.

[0089] In some embodiments, in combination Figure 4 As shown, the weld is formed with protrusions on both sides perpendicular to the plane where the second wall plate 202 is located, and the weld includes a first weld 203 facing the shell cavity 24 and a second weld 204 facing away from the shell cavity 24;

[0090] The protrusion height of the first weld 203 along the X direction is D1, wherein D1 satisfies: 0 mm ≤ D1 ≤ 0.15 mm;

[0091] The protrusion height of the second weld 204 along the X direction is D2, wherein D2 satisfies: 0 mm ≤ D2 ≤ 0.05 mm;

[0092] The width of the first weld 203 and / or the second weld 204 along the Y direction is L, wherein L satisfies: 0.5 mm≤L≤1 mm.

[0093] By limiting the upper limit of the protrusion height D1 of the first weld 203 along the X direction, the risk of scratching the electrode group 3 by the internal weld can be reduced, and by limiting the upper limit of the protrusion height D2 of the second weld 204 along the X direction, the problem of interference between adjacent batteries and between batteries and other components can be avoided.

[0094] At the same time, the existence of the weld also has a certain positive effect on the strength of the shell body 2. If the height of the inner weld and the outer weld is made zero, it is easy to cause the strength of the shell body 2 to decrease.

[0095] According to an embodiment of the present invention, on the other hand, a battery is provided, comprising: a shell structure as described above, and a pole group 3 arranged inside the shell structure; the pole group 3 is suitable for abutting against the reinforcing rib 21 so that the weld between the pole group 3 and the second wall plate 202 is spaced apart to avoid scratches on the pole group 3 caused by the weld.

[0096] The battery provided by the embodiment of the utility model is provided with a reinforcing rib 21 at the intersection of the first wall plate 201 and the second wall plate 202, the reinforcing rib 21 is located in the shell cavity 24, and the reinforcing rib 21 is at least located on one side of the second wall plate 202 formed with the weld; thereby, the overall structural strength of the shell structure, especially the strength at the edge of the shell body 2 and the weld position, can be strengthened; at the same time, by providing the reinforcing rib 21, the internal exhaust channel of the battery can be improved, and an exhaust gap can be ensured to be formed between the electrode group and the shell, thus avoiding deformation of the channel, ensuring gas circulation inside the battery, and improving safety performance; in addition, since the reinforcing rib 21 is at least located on one side of the second wall plate 202 formed with the weld, scratches on the electrode group 3 caused by the weld inside the shell body 2 can be avoided, thus ensuring the integrity of the electrode group 3.

[0097] The battery further comprises a cover plate 1 adapted to close an opening of the battery housing structure.

[0098] When multiple batteries are stacked in a direction perpendicular to the large surface, that is, when multiple batteries are stacked in the Y direction, the reinforcing ribs 21 inside adjacent batteries can be arranged correspondingly, so that the reinforcing ribs 21 participate in resisting the stress and play a supporting role for the shell body 2, so as to improve the strength of the shell body 2, ensure the flatness of the two first wall panels 201, and avoid deformation of the shell body 2 under stress.

[0099] The battery provided by the embodiment of the utility model can improve the abutment strength between the batteries after the batteries are assembled and stacked into groups, so that the PACK package does not need crossbeams and longitudinal beams, and the reinforcing ribs 21 play the role of reinforcing ribs, which greatly simplifies the internal structure of the package. At the same time, the production process of the package is simplified, the assembly complexity of the single battery is reduced, and the production cost is reduced.

[0100] Obviously, the above embodiments are only examples for clear explanation, and are not intended to limit the implementation methods. Although the embodiments of the present utility model are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations are all within the scope defined by the present utility model.

Claims

1. A housing structure, characterized in that: include: A shell body, wherein the shell body is formed by bending a plate to form a shell structure connected end to end, and the overlapping area of ​​the plate is welded to form a weld; the shell body has two first wall plates arranged opposite to each other along the Y direction, and two second wall plates arranged opposite to each other along the X direction, wherein the spacing between the two second wall plates is greater than the spacing between the two first wall plates; the weld is formed on one of the second wall plates; the shell body is hollow inside to form a shell cavity; At least one reinforcing rib is disposed at the intersection of the first wall plate and the second wall plate and is located in the shell inner cavity, and the reinforcing rib is at least located on one side of the second wall plate where the weld is formed.

2. The housing structure according to claim 1, characterized in that: The number of the reinforcing ribs is four, and the reinforcing ribs are arranged at the intersection of every two adjacent first wall panels and the second wall panels.

3. The housing structure according to claim 1, characterized in that: The plane where the first wall plate is located and the plane where the second wall plate is located are both parallel to the Z direction, and the Z direction is perpendicular to the X direction and the Y direction at the same time; The extending direction of the reinforcing rib is parallel to the Z direction, and the extending length of the reinforcing rib is not shorter than 90% of the extending length of the first wall panel.

4. The housing structure according to claim 3, characterized in that: A through hole is formed through the reinforcing rib, and an extending direction of the through hole is parallel to an extending direction of the reinforcing rib.

5. The housing structure according to any one of claims 1 to 4, characterized in that: The dimension of the reinforcing rib along the Y direction is a, wherein a satisfies: 1.5 mm ≤ a ≤ 3.5 mm; The dimension of the reinforcing rib along the X direction is b, wherein b satisfies: 1.5 mm ≤ b ≤ 3.5 mm.

6. The housing structure according to claim 5, characterized in that: The dimension a of the reinforcing rib along the Y direction is equal to the dimension b of the reinforcing rib along the X direction.

7. The housing structure according to claim 4, characterized in that: The reinforcing rib is formed with an abutting surface arranged at an angle with the first wall plate and the second wall plate, and the reinforcing rib is also provided with a through groove in a direction perpendicular to the abutting surface, and the through groove is connected with the through hole; The dimension of the through slot along the Z direction is n, wherein n satisfies: 0.5 mm ≤ n ≤ 20 mm; The through groove is located in the plane where the abutting surface is located and has a dimension m perpendicular to the Z direction, wherein m satisfies: 1mm≤m≤2.5mm; The reinforcing rib is provided with a plurality of through grooves at intervals along the Z direction, and the interval between two adjacent through grooves along the Z direction is k, wherein k satisfies: k≥1 mm.

8. The housing structure according to claim 7, characterized in that: The abutting surface is located in the plane where the abutting surface is located and has a dimension d perpendicular to the Z direction, wherein d satisfies: 2.12 mm≤d≤4.95 mm.

9. The housing structure according to any one of claims 1 to 4, characterized in that: The weld is formed with protrusions on both sides perpendicular to the plane where the second wall plate is located, and the weld includes a first weld facing the shell inner cavity and a second weld facing away from the shell inner cavity; The protrusion height of the first weld along the X direction is D1, wherein D1 satisfies: 0mm≤D1≤0.15mm; The protrusion height of the second weld along the X direction is D2, wherein D2 satisfies: 0mm≤D2≤0.05mm; The width of the first weld and / or the second weld along the Y direction is L, wherein L satisfies: 0.5 mm ≤ L ≤ 1 mm.

10. A battery, characterized in that: It comprises a shell structure as described in any one of claims 1 to 9 above, and a pole group arranged inside the shell structure; the pole group is suitable for abutting against the reinforcing rib so that the pole group and the weld of the second wall plate are spaced apart to avoid scratches on the pole group caused by the weld.

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