Battery shell and battery

Abstract

The invention belongs to the technical field of batteries, and discloses a battery shell and a battery, the battery shell comprises a closing plate, a shell body and a cover plate body, and the shell body and / or the cover plate body are / is provided with an operation through hole with a step structure, so that when the closing plate composed of a closing part and an insertion part closes the operation through hole, the operation through hole can be inserted into the insertion part; compared with the prior art, the large contact area is achieved, the sealing performance of the operation through hole is improved, the thickness of the limiting step in different welding modes is limited, the requirement that T1 is larger than or equal to 0.3 mm and smaller than or equal to 0.8 H is met during opposite seam welding, and T2 is larger than or equal to 0.5 mm and smaller than or equal to 0.8 H is met during penetrating welding, so that on one hand, the situation that the welding depth reserved for welding is too small due to the fact that the thickness of the limiting step is too large is avoided, and the welding quality is improved. And on the other hand, the situation that the thickness of the limiting step is too small, deformation is likely to happen, and effective structural support cannot be provided for the closed part is avoided.

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] When assembling a traditional battery structure, the electrode group is usually first installed in the battery casing, and then the positive and negative ears of the electrode group are bent multiple times to form an approximate S shape. The cover assembly connected to the pole is then installed into the open part of the battery casing, and the pole ears of corresponding polarity are welded to the pole. After the welding of the pole ears and the pole is completed, the battery casing and the bare aluminum plate in the cover assembly are welded, and the battery casing is sealed to complete the assembly of the battery. However, after the battery of this structure is assembled, since the pole ears and the poles need to be welded first, and then the bare aluminum plate and the casing body can be welded, high temperature and vibration and other adverse factors will be generated when the bare aluminum plate and the casing body are welded, thereby affecting the welding quality between the pole ears and the poles.

[0003] Therefore, in order to improve the welding quality between the battery pole and the pole of the traditional structure, the structure is improved, so that an operation window for welding the pole is opened in advance on the bare aluminum plate, so that the welding operation of the pole can be placed after the welding of the bare aluminum plate and the outer shell body, thereby improving the welding quality. After the welding operation of the pole is completed, the operation window is closed with a metal plate. However, due to the thin thickness of the bare aluminum plate, problems such as poor welding or poor welding strength are prone to occur when the metal plate is welded to the bare aluminum plate. Summary of the invention

[0004] The object of the present invention is to provide a battery housing and a battery, which can improve the welding quality of a closed working window and enhance the welding strength.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A battery shell is provided, the battery shell comprising a closing plate, a shell body with an opening, and a cover plate body for closing the opening of the shell body, a wall surface of the shell body opposite to the opening, and / or the cover plate body are provided with an operation through hole for welding a pole ear, the operation through hole is a stepped structure including a first hole segment and a second hole segment, and a limiting step is formed between the first hole segment and the second hole segment, the closing plate comprises a closing portion and an inserting portion, the inserting portion is inserted into the second hole segment, the closing portion is inserted into the first hole segment and abuts against the limiting step, and the closing portion is welded to the shell body and / or the cover plate body to close the operation through hole;

[0007] When the sealing portion and the shell body and / or the cover plate body are butt welded, the thickness dimension of the limiting step along the first direction is T1, and satisfies 0.3mm≤T1≤0.8H;

[0008] Or when the closing portion and the shell body, and / or the cover plate body are penetration welded, the thickness dimension of the limiting step along the first direction is T2, and satisfies, 0.5mm≤T2≤0.8H, wherein H is the thickness dimension of the wall surface opposite to the shell body and the opening or the cover plate body along the first direction.

[0009] Optionally, when the closing portion and the shell body, and / or the cover plate body are butt-welded, a width dimension of the limiting step along the second direction is L1, and satisfies 0.5 mm ≤ L1 ≤ 20 mm.

[0010] Optionally, when the closing portion and the shell body, and / or the cover plate body are through-welded, a width dimension of the limiting step along the second direction is L2, and satisfies 1mm≤L2≤20mm.

[0011] Optionally, a mounting boss is provided on the wall surface of the shell body opposite to the opening, and / or the cover body, and the mounting boss protrudes along the first direction away from the pole ear, and the working through hole of the stepped structure is opened on the mounting boss.

[0012] Optionally, the battery casing further comprises a pole, one end of which is electrically connected to the pole lug, and the other end of which extends out from a wall of the casing body opposite to the opening or a surface of the cover body away from the pole lug, a height dimension of the pole extending along the first direction is K, a height dimension of the mounting boss protruding along the first direction is Y, and 0.1 mm ≤ Y ≤ K is satisfied.

[0013] Optionally, the wall of the shell body opposite to the opening or the cover body on which the mounting boss is provided is also provided with an insulating member, and a spacing dimension W along the second direction between the side of the mounting boss facing the insulating member and the insulating member satisfies W≥1mm.

[0014] Optionally, a spacing dimension between an outer edge of a wall surface of the shell body opposite to the opening and the mounting boss along the third direction is D1, and satisfies 4mm≤D1≤30mm.

[0015] Optionally, a distance dimension between an outer edge of the cover body and the mounting boss along the third direction is D2, and satisfies 2mm≤D2≤30mm.

[0016] Optionally, a first groove is formed on the inner wall of the first hole section, and a second groove corresponding to the first groove is formed on the closing plate, and the first groove and the second groove together constitute a welding space for butt welding.

[0017] On the other hand, a battery is also 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 battery casing.

[0018] Beneficial effects of the present invention:

[0019] The present invention provides a battery shell, which is provided with a closing plate consisting of a plug-in portion and a closing portion, and a working through hole with a stepped structure is opened on the wall surface of the shell body opposite to the opening, and / or the cover plate body, so that when the closing plate closes the working through hole, the plug-in portion is inserted into the second hole section, the closing portion is inserted into the first hole section, and abuts against the limiting step, thereby increasing the contact area and improving the sealing of the working through hole, and by limiting the thickness of the limiting step under different welding forms, it satisfies 0.3mm≤T1≤0.8H during butt welding and satisfies 0.5mm≤T2≤0.8H during penetration welding, thereby, on the one hand, avoiding the limiting step from being too thick, resulting in too small a welding depth reserved for welding and affecting the welding strength, and on the other hand, avoiding the limiting step from being too thin, resulting in easy deformation and failure to provide effective structural support for the closing portion.

[0020] The present invention also provides a battery, which, by applying the above-mentioned battery shell, ensures the welding strength and welding quality of the working window for welding the pole ear, avoids exposure of the pole ear due to insufficient welding strength, improves the protection performance of the pole ear, and improves product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a partial structural cross-sectional view of the battery housing sealing plate provided by the present invention after the butt welding is completed;

[0022] Figure 2 It is a partial structural cross-sectional view of the battery housing sealing plate provided by the present invention after penetration welding is completed;

[0023] Figure 3 It is a partial cross-sectional view of the battery housing provided by the present invention after the housing body and the closing plate are assembled;

[0024] Figure 4 It is a partial longitudinal cross-sectional view of the battery housing provided by the present invention after the housing body and the closing plate are assembled;

[0025] Figure 5It is a partial cross-sectional view of the cross section of the battery housing provided by the present invention after the cover plate body and the closing plate are assembled;

[0026] Figure 6 It is a partial longitudinal cross-sectional view of the assembled cover plate body and the closing plate in the battery housing provided by the present invention.

[0027] In the figure:

[0028] 100, limiting step; 200, mounting boss;

[0029] 1. Closing plate; 11. Closing part; 12. Connecting part;

[0030] 2. Shell body;

[0031] 3. Cover plate body;

[0032] 4. Pole;

[0033] 5. Insulation parts. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] In order to improve the welding quality and welding strength when closing an operating window, the present invention provides a battery casing.

[0039] like Figures 1 to 6 As shown, the battery shell includes a closing plate 1, a shell body 2 with an opening, and a cover body 3 for closing the opening of the shell body 2. The wall surface of the shell body 2 opposite to the opening, and / or the cover body 3 are provided with an operating through hole for welding the pole ear. The operating through hole is a stepped structure including a first hole segment and a second hole segment, and a limiting step 100 is formed between the first hole segment and the second hole segment. The closing plate 1 includes a closing portion 11 and an inserting portion 12. The inserting portion 12 is inserted into the second hole segment. The closing portion 11 is inserted into the first hole segment and abuts against the limiting step 100. The closing portion 11 is welded to the shell body 2 and / or the cover body 3 to close the operating through hole.

[0040] When the sealing portion 11 and the housing body 2 and / or the cover plate body 3 are butt welded, the thickness dimension of the limiting step 100 along the first direction is T1, and satisfies 0.3mm≤T1≤0.8H;

[0041] When the closing portion 11 and the shell body 2, and / or the cover body 3 are through-welded, the thickness dimension of the limiting step 100 along the first direction is T2, and satisfies 0.5mm≤T2≤0.8H, where H is the thickness dimension of the wall surface opposite to the opening of the shell body 2 or the cover body 3 along the first direction.

[0042] The battery shell is provided with a closing plate 1 consisting of a plug-in portion 12 and a closing portion 11, and a working through hole with a stepped structure is opened on the wall of the shell body 2 opposite to the opening, and / or the cover plate body 3, so that when the closing plate 1 closes the working through hole, the plug-in portion 12 is inserted into the second hole section, and the closing portion 11 is inserted into the first hole section, and abuts against the limiting step 100, thereby increasing the contact area and improving the sealing of the working through hole, and by limiting the thickness of the limiting step 100 under different welding forms, it satisfies 0.3mm≤T1≤0.8H during butt welding and satisfies 0.5mm≤T2≤0.8H during penetration welding, thereby, on the one hand, avoiding the thickness of the limiting step 100 being too large, resulting in too small a welding depth reserved for welding and affecting the welding strength, and on the other hand, avoiding the thickness of the limiting step 100 being too small, resulting in easy deformation and failure to provide effective structural support for the closing portion 11.

[0043] In this embodiment, the reason why the lower limit of the thickness of the limit step 100 for the butt welding is smaller than the lower limit of the thickness of the limit step 100 for the penetration welding is that the penetration welding needs to reserve more thickness to prevent the limit step 100 from being welded through. Therefore, it is necessary to ensure that the limit step 100 has a larger thickness during the penetration welding.

[0044] Among them, the battery shell can be adapted to different types of batteries, such as blade batteries or square shell batteries. In addition, the battery shell can be formed into blade batteries or square shell batteries of various structures by the number of openings of the shell body 2 and the number of cover bodies 3, for example: a blade battery with a shell body 2 with openings on both sides and a double cover body 3, or a blade battery with a shell body 2 with a single side window and a single cover body 3, or a square shell battery with a shell body 2 with a single side window and a single cover body 3, etc., and the working through hole can be set separately on the shell body 2, or can be set separately on the cover body 3, or the working through hole can be set on both the cover body 3 and the shell body 2.

[0045] Alternatively, if Figure 1 As shown, when the closing portion 11 and the shell body 2 and / or the cover body 3 are butt welded, the width dimension of the limiting step 100 along the second direction is L1, and satisfies 0.5mm≤L1≤20mm. By limiting the width dimension L1 of the limiting step 100 along the second direction when butt welding is adopted, so that it satisfies 0.5mm≤L1≤20mm, on the one hand, it is avoided that the width of the limiting step 100 is too small, and it is unable to provide sufficient transverse welding area during welding, resulting in the occurrence of bad problems such as explosion points and broken welding, and reducing the welding quality. On the other hand, it is avoided that the width of the limiting step 100 along the second direction is too large, resulting in size redundancy and waste of materials.

[0046] In this embodiment, the width dimension L1 of the limiting step 100 along the second direction can be any value between 0.5mm and 20mm or a range between any two values, for example, 0.5mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, etc.

[0047] Alternatively, if Figure 2 As shown, when the closing portion 11 and the shell body 2 and / or the cover plate body 3 are through-welded, the width dimension of the limiting step 100 along the second direction is L2, and satisfies 1mm≤L2≤20mm. By limiting the width dimension L2 of the limiting step 100 along the second direction when through-welding is adopted, so that it satisfies 1mm≤L2≤20mm, on the one hand, it is avoided that the width of the limiting step 100 is too small, and it is unable to provide sufficient transverse welding area during welding, resulting in the occurrence of bad problems such as explosion points and broken welding, and reducing the welding quality. On the other hand, it is avoided that the width of the limiting step 100 along the second direction is too large, resulting in size redundancy and waste of materials.

[0048] In this embodiment, the width dimension L2 of the limiting step 100 along the second direction can be any value between 1mm and 20mm or a range between any two values, for example, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, etc.

[0049] It can be understood that the reason why the lower limit of the width of the limit step 100 for butt welding is smaller than the lower limit of the width of the limit step 100 for penetration welding is because the form of penetration welding needs to penetrate the closed portion 11 of the closing plate 1 and the limit step 100 for welding, while the butt welding only completes the welding between the closed portion 11 and the outer shell body 2 or the cover plate body 3, and does not need to penetrate the limit step 100. Therefore, when using penetration welding, more width needs to be reserved to avoid the limit step 100 being welded through.

[0050] Alternatively, if Figures 2 to 6 As shown, a mounting boss 200 is provided on the wall surface of the shell body 2 opposite to the opening, and / or the cover body 3, the mounting boss 200 protrudes in a first direction away from the pole ear, and a step-structured working through hole is provided on the mounting boss 200. By providing the mounting boss 200 on the wall surface of the shell body 2 opposite to the opening, and / or the cover body 3, the installation height of the closing plate 1 is raised, thereby avoiding affecting the pole ear that has been welded when welding the closing plate 1, and ensuring the welding quality of the pole ear.

[0051] Among them, the mounting boss 200 can be set alone on the wall surface opposite to the opening of the shell body 2, or can be set alone on the cover body 3, or the mounting boss 200 can be set on the wall surface opposite to the opening of the shell body 2 and the cover body 3. The specific setting method can be freely adjusted according to the specific structure of the battery.

[0052] Alternatively, if Figure 1 , Figure 2 As shown, the battery housing also includes a pole 4, one end of which is electrically connected to the pole lug, and the other end of which extends out of the wall of the housing body 2 opposite to the opening or the surface of the cover body 3 away from the pole lug. The height dimension of the pole 4 extending in the first direction is K, and the height of the mounting boss 200 protruding in the first direction is Y, and 0.1mm≤Y≤K is satisfied. By limiting the height Y of the mounting boss 200 protruding in the first direction, on the one hand, it is avoided that the height of the mounting boss 200 is too small, resulting in being too close to the pole lug, so that when the closing plate 1 is welded, the closing plate 1 affects the pole lug that has been welded, and on the other hand, it is avoided that the height of the mounting boss 200 protrudes beyond the height of the pole 4, resulting in interference with the connection and assembly between the pole 4 and the busbar.

[0053] Alternatively, if Figure 1 , Figure 2 As shown, the side of the wall surface of the housing body 2 or the cover body 3 opposite to the opening is provided with a mounting boss 200 and is also provided with an insulating member 5, and the spacing dimension between the side of the mounting boss 200 facing the insulating member 5 and the insulating member 5 along the second direction is W, and satisfies W≥1mm. By limiting the spacing dimension W between the mounting boss 200 and the insulating member 5 along the second direction, it is avoided that the mounting boss 200 and the insulating member 5 are too close, resulting in the high temperature generated during the welding operation of the mounting boss 200 and the closing plate 1 melting the insulating member 5, causing the insulating member 5 to deform, resulting in reduced insulation.

[0054] Alternatively, if Figure 4 As shown, the spacing dimension D1 between the outer edge of the wall surface of the shell body 2 opposite to the opening and the mounting boss 200 along the third direction meets the condition of 4mm≤D1≤30mm. Since the mounting boss 200 is formed by stamping the shell body 2, the spacing dimension D1 between the outer edge of the wall surface of the shell body 2 opposite to the opening and the mounting boss 200 along the third direction is limited. On the one hand, it is prevented that the mounting boss 200 is too close to the outer edge of the wall surface of the shell body 2 opposite to the opening, resulting in deformation of the wall surface of the shell body 2 opposite to the opening after stamping. On the other hand, it is prevented that the mounting boss 200 is too far from the outer edge of the wall surface of the shell body 2 opposite to the opening, so that the overall outer dimensions of the shell body 2 are increased under the premise that the outer dimensions of the mounting boss 200 remain unchanged, resulting in dimensional redundancy and increased costs.

[0055] In this embodiment, the spacing dimension D1 between the outer edge of the wall of the shell body 2 opposite to the opening and the mounting boss 200 along the third direction can be any value between 4mm and 30mm or a range between any two values, for example 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, etc.

[0056] Alternatively, if Figure 6 As shown, the spacing dimension D2 between the outer edge of the cover body 3 and the mounting boss 200 along the third direction satisfies 2mm≤D2≤30mm. Since the mounting boss 200 is formed by stamping the cover body 3, the spacing dimension D2 between the outer edge of the cover body 3 and the mounting boss 200 along the third direction is limited. On the one hand, it is prevented that the mounting boss 200 is too close to the outer edge of the cover body 3, resulting in deformation of the cover body 3 after stamping. On the other hand, it is prevented that the mounting boss 200 is too far from the outer edge of the cover body 3, so that the overall outer dimensions of the cover body 3 are increased under the premise that the outer dimensions of the mounting boss 200 remain unchanged, resulting in dimensional redundancy and increased costs.

[0057] In this embodiment, the spacing dimension D2 between the outer edge of the cover body 3 and the mounting boss 200 along the third direction can be any value between 2mm and 30mm or a range between any two values, for example 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 29mm, 30mm, etc.

[0058] It can be understood that the reason why the distance between the outer edge of the cover body 3 and the mounting boss 200 along the third direction is smaller than the distance between the outer edge of the wall opposite to the opening of the shell body 2 and the mounting boss 200 is because the shell body 2 is formed by bending a plate, and in addition to the wall opposite to the opening, there are other walls. Therefore, it is necessary to reserve space for bending other walls, and the cover body 3 is only a separate component, so there is no need to consider reserving space for other structures.

[0059] Among them, in order to verify the thickness dimension T1 of the limiting step 100 along the first direction when the closing portion 11 and the shell body 2, and / or the cover plate body 3 are butt-welded, the width dimension L1 of the limiting step 100 along the second direction when the closing portion 11 and the shell body 2, and / or the cover plate body 3 are butt-welded, the height Y of the mounting boss 200 protruding along the first direction, the spacing dimension W between the side of the mounting boss 200 facing the insulating member 5 and the insulating member 5 along the second direction, and the spacing dimension D1 between the outer edge of the wall of the shell body 2 opposite to the opening and the mounting boss 200 along the third direction, for the influence of the closing plate 1 when the butt welding is performed on the shell body 2, as shown in Table 1, ten groups of embodiments and eight groups of comparative examples are provided for testing, and the thickness dimension H of the wall of the shell body 2 opposite to the opening or the cover plate body 3 along the first direction is limited to 2 mm, and the height dimension K of the pole 4 extending along the first direction is 3.2 mm.

[0060] Table 1

[0061]

[0062] In Example 1, the dimension W=1mm is set to meet the range of W≥1mm; the dimension T1=0.3mm is set to meet the range of 0.3mm≤T1≤0.8H; the dimension L1=0.5mm is set to meet the range of 0.5mm≤L1≤20mm; the dimension D1=4mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=0.1mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0063] In Example 2, the dimension W=4mm is set to meet the range of W≥1mm; the dimension T1=0.5mm is set to meet the range of 0.3mm≤T1≤0.8H; the dimension L1=3mm is set to meet the range of 0.5mm≤L1≤20mm; the dimension D1=6mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=0.5mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0064] In Example 3, the dimension W=8mm is set to meet the range of W≥1mm; the dimension T1=0.6mm is set to meet the range of 0.3mm≤T1≤0.8H; the dimension L1=5mm is set to meet the range of 0.5mm≤L1≤20mm; the dimension D1=8mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=1mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0065] In Example 4, the dimension W=12mm is set to meet the range of W≥1mm; the dimension T1=0.8mm is set to meet the range of 0.3mm≤T1≤0.8H; the dimension L1=7mm is set to meet the range of 0.5mm≤L1≤20mm; the dimension D1=12mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=1.3mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0066] In Example 5, the dimension W=16mm is set to meet the range of W≥1mm; the dimension T1=1mm is set to meet the range of 0.3mm≤T1≤0.8H; the dimension L1=9mm is set to meet the range of 0.5mm≤L1≤20mm; the dimension D1=16mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=1.7mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0067] In Example 6, the dimension W=20mm is set to meet the range of W≥1mm; the dimension T1=1.2mm is set to meet the range of 0.3mm≤T1≤0.8H; the dimension L1=13mm is set to meet the range of 0.5mm≤L1≤20mm; the dimension D1=21mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=2mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0068] In Example 7, the dimension W=30mm is set to meet the range of W≥1mm; the dimension T1=1.4mm is set to meet the range of 0.3mm≤T1≤0.8H; the dimension L1=16mm is set to meet the range of 0.5mm≤L1≤20mm; the dimension D1=25mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=2.6mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0069] In Example 8, the dimension W=60mm is set to meet the range of W≥1mm; the dimension T1=1.6mm is set to meet the range of 0.3mm≤T1≤0.8H; the dimension L1=20mm is set to meet the range of 0.5mm≤L1≤20mm; the dimension D1=30mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=3.2mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0070] In Example 9, the dimension W=6mm is set to meet the range of W≥1mm; the dimension T1=0.5mm is set to meet the range of 0.3mm≤T1≤0.8H; the dimension L1=3mm is set to meet the range of 0.5mm≤L1≤20mm; the dimension D1=6mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=1mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0071] In Example 10, the dimension W=6mm is set to meet the range of W≥1mm; the dimension T1=0.5mm is set to meet the range of 0.3mm≤T1≤0.8H; the dimension L1=3mm is set to meet the range of 0.5mm≤L1≤20mm; the dimension D1=6mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=2mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0072] It can be seen from Examples 1 to 10 that when the closing portion 11 and the shell body 2, and / or the cover plate body 3 are butt-welded, the thickness dimension T1 of the limiting step 100 along the first direction, the width dimension L1 of the limiting step 100 along the second direction, the height Y of the mounting boss 200 protruding along the first direction, the spacing dimension W between the side of the mounting boss 200 facing the insulating part 5 and the insulating part 5 along the second direction, and the spacing dimension D1 between the outer edge of the wall surface opposite to the opening of the shell body 2 and the mounting boss 200 along the third direction all meet their respective corresponding set ranges. At this time, after the closing plate 1 and the shell body 2 are butt-welded, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; the shell body 2 does not deform after stamping, which meets the product use requirements.

[0073] In Comparative Example 1, the dimension W is set to 0.5mm, which does not satisfy the range of W≥1mm; the dimension T1 is set to 1mm, which satisfies the range of 0.3mm≤T1≤0.8H; the dimension L1 is set to 2mm, which satisfies the range of 0.5mm≤L1≤20mm; the dimension D1 is set to 5mm, which satisfies the range of 4mm≤D1≤30mm; the dimension Y is set to 2mm, which satisfies the range of 0.1mm≤Y≤K. At this time, after butt welding is used to weld the closing plate 1 and the outer shell body 2, it is found that the insulating part 5 is melted and deformed.

[0074] In Comparative Example 2, the dimension W=2mm is set to satisfy the range of W≥1mm; the dimension T1=0.2mm is set to not satisfy the range of 0.3mm≤T1≤0.8H; the dimension L1=2mm is set to satisfy the range of 0.5mm≤L1≤20mm; the dimension D1=5mm is set to satisfy the range of 4mm≤D1≤30mm; the dimension Y=2mm is set to satisfy the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, it is found that the limit step 100 is deformed.

[0075] It can be seen from Comparative Example 2 that when the thickness dimension T1 of the limiting step 100 along the first direction is less than the minimum value of the set range 0.3mm≤T1≤0.8H, the thickness of the limiting step 100 is too small, resulting in insufficient structural strength during welding operations, resulting in deformation.

[0076] In Comparative Example 3, the dimension W=2mm is set to satisfy the range of W≥1mm; the dimension T1=1mm is set to satisfy the range of 0.3mm≤T1≤0.8H; the dimension L1=0.2mm is set, which does not satisfy the range of 0.5mm≤L1≤20mm; the dimension D1=5mm is set to satisfy the range of 4mm≤D1≤30mm, and the dimension Y=2mm is set to satisfy the range of 0.1mm≤Y≤K. At this time, after butt welding is used to weld the closing plate 1 and the outer shell body 2, explosion spots and broken welds are found, and the defective rate is >10%.

[0077] It can be seen from Comparative Example 3 that when the width dimension L1 of the limiting step 100 along the second direction is less than the minimum value of the set range 0.5mm≤L1≤20mm, the limiting step 100 cannot provide sufficient lateral welding area for welding, resulting in undesirable phenomena such as explosion spots and broken welds during welding.

[0078] In Comparative Example 4, the dimension W=2mm is set to satisfy the range of W≥1mm; the dimension T1=1mm is set to satisfy the range of 0.3mm≤T1≤0.8H; the dimension L1=2mm is set to satisfy the range of 0.5mm≤L1≤20mm; the dimension D1=1mm is set, which does not satisfy the range of 4mm≤D1≤30mm; the dimension Y=2mm is set to satisfy the range of 0.1mm≤Y≤K, and deformation occurs after the shell body 2 is stamped.

[0079] It can be seen from Comparative Example 4 that when the spacing dimension D1 between the outer edge of the wall opposite to the opening of the shell body 2 and the mounting boss 200 along the third direction is less than the minimum value of the set range 4mm≤D1≤30mm, the mounting boss 200 is too close to the outer edge of the shell body 2, resulting in deformation of the wall opposite to the opening of the shell body 2 after stamping.

[0080] In Comparative Example 5, the dimension W=6mm is set to meet the range of W≥1mm; the dimension T1=1.8mm is set to not meet the range of 0.3mm≤T1≤0.8H; the dimension L1=3mm is set to meet the range of 0.5mm≤L1≤20mm; the dimension D1=6mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=2mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, the welding strength does not meet the pressure test under 1.2MPA.

[0081] It can be seen from Comparative Example 5 that since the thickness dimension H of the wall or cover body 3 opposite to the opening of the shell body 2 along the first direction is 2 mm, the upper limit value of T1 is 1.6 mm. When the thickness dimension T1 of the limiting step 100 along the first direction is 1.8 mm, it is greater than the maximum value of the setting range 0.3 mm ≤ T1 ≤ 0.8H. At this time, the thickness of the limiting step 100 is too large, resulting in a welding depth reserved for welding that is too small, and the welding strength does not meet the pressure test under 1.2 MPA.

[0082] In Comparative Example 6, the dimension W=6mm is set to satisfy the range of W≥1mm; the dimension T1=1mm is set to satisfy the range of 0.3mm≤T1≤0.8H; the dimension L1=25mm is set, which does not satisfy the range of 0.5mm≤L1≤20mm; the dimension D1=6mm is set to satisfy the range of 4mm≤D1≤30mm, and the dimension Y=2mm is set to satisfy the range of 0.1mm≤Y≤K. At this time, the size of the limit step 100 is too large, there is size redundancy, and the cost is high.

[0083] It can be seen from Comparative Example 6 that when the width dimension L1 of the limiting step 100 along the second direction is greater than the maximum value of the setting range 0.5mm≤L1≤20mm, the limiting step 100 is too large, has size redundancy, and is costly.

[0084] In Comparative Example 7, the dimension W=6mm is set to satisfy the range of W≥1mm; the dimension T1=1mm is set to satisfy the range of 0.3mm≤T1≤0.8H; the dimension L1=3mm is set to satisfy the range of 0.5mm≤L1≤20mm; the dimension D1=50mm is set, which does not satisfy the range of 4mm≤D1≤30mm; the dimension Y=2mm is set to satisfy the range of 0.1mm≤Y≤K. In this case, the size of the shell body 2 is too large, there is size redundancy, and the cost is high.

[0085] It can be seen from Comparative Example 7 that when the spacing dimension D1 between the outer edge of the wall opposite to the opening of the shell body 2 and the mounting boss 200 along the third direction is greater than the maximum value of the set range 4mm≤D1≤30mm, the mounting boss 200 is too far away from the outer edge of the shell body 2, resulting in the shell body 2 being too large, with dimensional redundancy and high cost.

[0086] In comparative example 8, the dimension W is set to 6 mm, satisfying the range of W ≥ 1 mm; the dimension T1 is set to 1 mm, satisfying the range of 0.3 mm ≤ T1 ≤ 0.8 H; the dimension L1 is set to 3 mm, satisfying the range of 0.5 mm ≤ L1 ≤ 20 mm; the dimension D1 is set to 6 mm, satisfying the range of 4 mm ≤ D1 ≤ 30 mm, and the dimension Y is set to 4 mm, satisfying the range of 0.1 mm ≤ Y ≤ K, at which time the interference pole 4 is connected to the busbar.

[0087] It can be seen from Comparative Example 8 that since the height dimension K of the pole 4 extending along the first direction is 3.2 mm, the upper limit value of Y is 3.2 mm. When the height Y of the mounting boss 200 protruding along the first direction is greater than the maximum value of the set range 0.1 mm ≤ Y ≤ K, the height of the mounting boss 200 is greater than the height of the pole 4. As a result, when the pole 4 is welded to the busbar, the pole 4 and the busbar cannot be connected due to the obstruction of the mounting boss 200.

[0088] Among them, in order to verify the thickness dimension T2 of the limiting step 100 along the first direction when the closing portion 11 and the shell body 2, and / or the cover plate body 3 are penetration welded, the width dimension L2 of the limiting step 100 along the second direction when the closing portion 11 and the shell body 2, and / or the cover plate body 3 are penetration welded, the height Y of the mounting boss 200 protruding along the first direction, the spacing dimension W between the side of the mounting boss 200 facing the insulating member 5 and the insulating member 5 along the second direction, and the spacing dimension D1 between the outer edge of the wall of the shell body 2 opposite to the opening and the mounting boss 200 along the third direction, for the influence of the closing plate 1 on the shell body 2 when penetration welding is performed, as shown in Table 1, ten groups of embodiments and eight groups of comparative examples are provided for testing, and the thickness dimension H of the wall of the shell body 2 opposite to the opening or the cover plate body 3 along the first direction is limited to 2 mm, and the height dimension K of the pole 4 extending along the first direction is 3.2 mm.

[0089] Table 2

[0090]

[0091] In Example 11, the dimension W=1mm is set to meet the range of W≥1mm; the dimension T1=0.5mm is set to meet the range of 0.5mm≤T1≤0.8H; the dimension L1=1mm is set to meet the range of 1mm≤L1≤20mm; the dimension D1=4mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=0.1mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0092] In Example 12, the dimension W=4mm is set to meet the range of W≥1mm; the dimension T1=0.6mm is set to meet the range of 0.5mm≤T1≤0.8H; the dimension L1=2mm is set to meet the range of 1mm≤L1≤20mm; the dimension D1=6mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=0.5mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0093] In Example 13, the dimension W=8mm is set to meet the range of W≥1mm; the dimension T1=0.7mm is set to meet the range of 0.5mm≤T1≤0.8H; the dimension L1=5mm is set to meet the range of 1mm≤L1≤20mm; the dimension D1=8mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=1mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0094] In Example 14, the dimension W=12mm is set to meet the range of W≥1mm; the dimension T1=0.8mm is set to meet the range of 0.5mm≤T1≤0.8H; the dimension L1=7mm is set to meet the range of 1mm≤L1≤20mm; the dimension D1=12mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=1.3mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0095] In Example 15, the dimension W=16mm is set to meet the range of W≥1mm; the dimension T1=1mm is set to meet the range of 0.5mm≤T1≤0.8H; the dimension L1=9mm is set to meet the range of 1mm≤L1≤20mm; the dimension D1=16mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=1.7mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0096] In Example 16, the dimension W=20mm is set to meet the range of W≥1mm; the dimension T1=1.2mm is set to meet the range of 0.5mm≤T1≤0.8H; the dimension L1=13mm is set to meet the range of 1mm≤L1≤20mm; the dimension D1=21mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=2mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0097] In Example 17, the dimension W=30mm is set to meet the range of W≥1mm; the dimension T1=1.4mm is set to meet the range of 0.5mm≤T1≤0.8H; the dimension L1=17mm is set to meet the range of 1mm≤L1≤20mm; the dimension D1=26mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=2.6mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0098] In Example 18, the dimension W=60mm is set to meet the range of W≥1mm; the dimension T1=1.6mm is set to meet the range of 0.5mm≤T1≤0.8H; the dimension L1=20mm is set to meet the range of 1mm≤L1≤20mm; the dimension D1=30mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=3.2mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0099] In Example 19, the dimension W=6mm is set to meet the range of W≥1mm; the dimension T1=0.5mm is set to meet the range of 0.5mm≤T1≤0.8H; the dimension L1=3mm is set to meet the range of 1mm≤L1≤20mm; the dimension D1=6mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=1mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0100] In Example 20, the dimension W=6mm is set to meet the range of W≥1mm; the dimension T1=0.5mm is set to meet the range of 0.5mm≤T1≤0.8H; the dimension L1=3mm is set to meet the range of 1mm≤L1≤20mm; the dimension D1=6mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=2mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; and the outer shell body 2 is not deformed after stamping.

[0101] It can be seen from Examples 11 to 20 that when the closing portion 11 and the shell body 2, and / or the cover plate body 3 are butt-welded, the thickness dimension T1 of the limiting step 100 along the first direction, the width dimension L1 of the limiting step 100 along the second direction, the height Y of the mounting boss 200 protruding along the first direction, the spacing dimension W between the side of the mounting boss 200 facing the insulating part 5 and the insulating part 5 along the second direction, and the spacing dimension D1 between the outer edge of the wall surface opposite to the opening of the shell body 2 and the mounting boss 200 along the third direction all meet their respective corresponding set ranges. At this time, after the closing plate 1 and the shell body 2 are butt-welded, no melting deformation is found in the insulating part 5; the welding strength meets the pressure test under 1.2MPA; no explosion points or broken welds are found; the shell body 2 does not deform after stamping, which meets the product's use requirements.

[0102] In comparative example 9, the dimension W is set to 0.5mm, which does not satisfy the range of W≥1mm; the dimension T1 is set to 1mm, which satisfies the range of 0.5mm≤T1≤0.8H; the dimension L1 is set to 2mm, which satisfies the range of 1mm≤L1≤20mm; the dimension D1 is set to 5mm, which satisfies the range of 4mm≤D1≤30mm; the dimension Y is set to 2mm, which satisfies the range of 0.1mm≤Y≤K. At this time, after butt welding is used to weld the closing plate 1 and the outer shell body 2, it is found that the insulating part 5 is melted and deformed.

[0103] In comparative example 10, the dimension W=2mm is set to satisfy the range of W≥1mm; the dimension T1=0.2mm is set to not satisfy the range of 0.5mm≤T1≤0.8H; the dimension L1=2mm is set to satisfy the range of 1mm≤L1≤20mm; the dimension D1=5mm is set to satisfy the range of 4mm≤D1≤30mm; the dimension Y=2mm is set to satisfy the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, it is found that the limit step 100 is deformed.

[0104] It can be seen from Comparative Example 10 that when the thickness dimension T1 of the limiting step 100 along the first direction is less than the minimum value of the set range 0.3mm≤T1≤0.8H, the thickness of the limiting step 100 is too small, resulting in insufficient structural strength during welding operations, resulting in deformation.

[0105] In Comparative Example 11, the dimension W=2mm is set to satisfy the range of W≥1mm; the dimension T1=1mm is set to satisfy the range of 0.5mm≤T1≤0.8H; the dimension L1=0.2mm is set, which does not satisfy the range of 1mm≤L1≤20mm; the dimension D1=5mm is set to satisfy the range of 4mm≤D1≤30mm, and the dimension Y=2mm is set to satisfy the range of 0.1mm≤Y≤K. At this time, after butt welding is used to weld the closing plate 1 and the outer shell body 2, explosion spots and broken welds are found, and the defective rate is >10%.

[0106] It can be seen from comparative example 11 that when the width dimension L1 of the limiting step 100 along the second direction is less than the minimum value of the set range 0.5mm≤L1≤20mm, the limiting step 100 cannot provide sufficient transverse welding area for welding, resulting in undesirable phenomena such as explosion spots and broken welds during welding.

[0107] In Comparative Example 12, the dimension W is set to 2 mm, which satisfies the range of W ≥ 1 mm; the dimension T1 is set to 1 mm, which satisfies the range of 0.5 mm ≤ T1 ≤ 0.8 H; the dimension L1 is set to 2 mm, which satisfies the range of 1 mm ≤ L1 ≤ 20 mm; the dimension D1 is set to 1 mm, which does not satisfy the range of 4 mm ≤ D1 ≤ 30 mm; the dimension Y is set to 2 mm, which satisfies the range of 0.1 mm ≤ Y ≤ K, and deformation occurs after the shell body 2 is stamped.

[0108] It can be seen from Comparative Example 12 that when the spacing dimension D1 between the outer edge of the wall opposite to the opening of the shell body 2 and the mounting boss 200 along the third direction is less than the minimum value of the set range 4mm≤D1≤30mm, the mounting boss 200 is too close to the outer edge of the shell body 2, resulting in deformation of the wall opposite to the opening of the shell body 2 after stamping.

[0109] In Comparative Example 13, the dimension W=6mm is set to meet the range of W≥1mm; the dimension T1=1.8mm is set to not meet the range of 0.5mm≤T1≤0.8H; the dimension L1=3mm is set to meet the range of 1mm≤L1≤20mm; the dimension D1=6mm is set to meet the range of 4mm≤D1≤30mm, and the dimension Y=2mm is set to meet the range of 0.1mm≤Y≤K. At this time, after the closing plate 1 and the outer shell body 2 are welded by butt welding, the welding strength does not meet the pressure test under 1.2MPA.

[0110] It can be seen from Comparative Example 13 that since the thickness dimension H of the wall or cover body 3 opposite to the opening of the shell body 2 along the first direction is 2 mm, the upper limit value of T1 is 1.6 mm. When the thickness dimension T1 of the limiting step 100 along the first direction is 1.8 mm, it is greater than the maximum value of the setting range 0.3 mm ≤ T1 ≤ 0.8H. At this time, the thickness of the limiting step 100 is too large, resulting in a welding depth reserved for welding that is too small, and the welding strength does not meet the pressure test under 1.2 MPA.

[0111] In Comparative Example 14, the dimension W=6mm is set to satisfy the range of W≥1mm; the dimension T1=1mm is set to satisfy the range of 0.5mm≤T1≤0.8H; the dimension L1=25mm is set, which does not satisfy the range of 1mm≤L1≤20mm; the dimension D1=6mm is set to satisfy the range of 4mm≤D1≤30mm, and the dimension Y=2mm is set to satisfy the range of 0.1mm≤Y≤K. At this time, the size of the limit step 100 is too large, there is size redundancy, and the cost is high.

[0112] It can be seen from Comparative Example 14 that when the width dimension L1 of the limiting step 100 along the second direction is greater than the maximum value of the setting range 0.5mm≤L1≤20mm, the limiting step 100 is too large, has size redundancy, and is costly.

[0113] In comparative example 15, the dimension W=6mm is set to satisfy the range of W≥1mm; the dimension T1=1mm is set to satisfy the range of 0.5mm≤T1≤0.8H; the dimension L1=3mm is set to satisfy the range of 1mm≤L1≤20mm; the dimension D1=50mm is set, which does not satisfy the range of 4mm≤D1≤30mm; the dimension Y=2mm is set to satisfy the range of 0.1mm≤Y≤K. In this case, the size of the shell body 2 is too large, there is size redundancy, and the cost is high.

[0114] It can be seen from comparative example 15 that when the spacing dimension D1 between the outer edge of the wall opposite to the opening of the shell body 2 and the mounting boss 200 along the third direction is greater than the maximum value of the set range 4mm≤D1≤30mm, the mounting boss 200 is too far away from the outer edge of the shell body 2, resulting in the shell body 2 being too large, with dimensional redundancy and high cost.

[0115] In comparative example 16, the dimension W is set to 6 mm, satisfying the range of W ≥ 1 mm; the dimension T1 is set to 1 mm, satisfying the range of 0.5 mm ≤ T1 ≤ 0.8 H; the dimension L1 is set to 3 mm, satisfying the range of 1 mm ≤ L1 ≤ 20 mm; the dimension D1 is set to 6 mm, satisfying the range of 4 mm ≤ D1 ≤ 30 mm, and the dimension Y is set to 4 mm, satisfying the range of 0.1 mm ≤ Y ≤ K, at which time the interference pole 4 is connected to the busbar.

[0116] It can be seen from Comparative Example 16 that since the height dimension K of the pole 4 extending along the first direction is 3.2 mm, the upper limit value of Y is 3.2 mm. When the height Y of the mounting boss 200 protruding along the first direction is greater than the maximum value of the set range 0.1 mm ≤ Y ≤ K, the height of the mounting boss 200 is greater than the height of the pole 4. As a result, when the pole 4 is welded to the busbar, the pole 4 and the busbar cannot be connected due to the obstruction of the mounting boss 200.

[0117] Alternatively, if Figure 1 As shown, a first groove is formed on the inner wall of the first hole section, and a second groove corresponding to the first groove is formed on the closing plate 1, and the first groove and the second groove together constitute a welding space for butt welding. By forming a first groove on the inner wall of the first hole section and forming a second groove corresponding to the first groove on the closing plate 1, sufficient welding area is provided for butt welding, thereby ensuring the structural strength after butt welding.

[0118] In this embodiment, a battery is further provided, the battery comprising a pole group and the above-mentioned battery casing, wherein the pole group is arranged in the battery casing. By using the above-mentioned battery casing, the battery ensures the welding strength and welding quality of the working window for welding the pole ear, avoids the exposure of the pole ear due to insufficient welding strength, improves the protection performance of the pole ear, and improves the product quality.

[0119] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A battery housing, characterized in that: The battery shell comprises a closing plate, a shell body with an opening, and a cover body for closing the opening of the shell body, a wall surface of the shell body opposite to the opening, and / or the cover body are provided with an operation through hole for welding the electrode ear, the operation through hole is a stepped structure including a first hole segment and a second hole segment, and a limiting step is formed between the first hole segment and the second hole segment, the closing plate comprises a closing portion and an inserting portion, the inserting portion is inserted into the second hole segment, the closing portion is inserted into the first hole segment and abuts against the limiting step, and the closing portion is welded to the shell body and / or the cover body to close the operation through hole; When the sealing portion and the shell body and / or the cover plate body are butt welded, the thickness dimension of the limiting step along the first direction is T1, and satisfies 0.3mm≤T1≤0.8H; Or when the closing portion and the shell body, and / or the cover plate body are penetration welded, the thickness dimension of the limiting step along the first direction is T2, and satisfies, 0.5mm≤T2≤0.8H, wherein H is the thickness dimension of the wall surface opposite to the shell body and the opening or the cover plate body along the first direction.

2. The battery housing according to claim 1, characterized in that: When the closing portion and the shell body and / or the cover plate body are butt-welded, the width dimension of the limiting step along the second direction is L1, and satisfies 0.5mm≤L1≤20mm.

3. The battery housing according to claim 1, characterized in that: When the closing portion and the shell body and / or the cover plate body are through-welded, the width dimension of the limiting step along the second direction is L2, and satisfies 1mm≤L2≤20mm.

4. The battery housing according to claim 1, characterized in that: A mounting boss is provided on the wall of the shell body opposite to the opening, and / or the cover body. The mounting boss protrudes along the first direction away from the pole ear, and the working through hole of the stepped structure is opened on the mounting boss.

5. The battery housing according to claim 4, characterized in that: The battery casing also includes a pole, one end of which is electrically connected to the pole lug, and the other end of the pole extends out of the wall of the casing body opposite to the opening or the surface of the cover body away from the pole lug, the height dimension of the pole extending along the first direction is K, the height of the mounting boss protruding along the first direction is Y, and 0.1mm≤Y≤K is satisfied.

6. The battery housing according to claim 4, characterized in that: The wall of the shell body opposite to the opening or the cover body on which the mounting boss is provided is also provided with an insulating member, and a spacing dimension W along the second direction between the side of the mounting boss facing the insulating member and the insulating member satisfies W≥1mm.

7. The battery casing according to claim 4, characterized in that: The spacing dimension between the outer edge of the wall surface of the shell body opposite to the opening and the mounting boss along the third direction is D1, and satisfies 4mm≤D1≤30mm.

8. The battery casing according to claim 4, characterized in that: The distance dimension between the outer edge of the cover body and the mounting boss along the third direction is D2, and satisfies 2mm≤D2≤30mm.

9. The battery housing according to claim 2, characterized in that: A first groove is formed on the inner wall of the first hole section, and a second groove corresponding to the first groove is formed on the closing plate. The first groove and the second groove together constitute a welding space for butt welding.

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

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