Battery housing and battery that it contains

Abstract

Battery housing, characterized in that it has a circumferential housing body (111), wherein the housing body (111) has at least two oppositely arranged first side surfaces (A) and at least two oppositely arranged second side surfaces (B), wherein an area of ​​each of the first side surfaces (A) is larger than an area of ​​each of the second side surfaces (B); the first side surfaces (A) and the second side surfaces (B) enclose one another to form a receiving space and form two opening portions (D) at the upper and lower ends, wherein a first side surface (A) or a second side surface (B) forms an interface end and a first weld seam (e1) is formed by welding at the interface end;wherein an adjacent first side surface (A) and second side surface (B) are connected by a transition section (C), a surface on which the first weld seam (e1) is located has a first center line (f1), the first center line (f1) is perpendicular to the opening sections (D), the first weld seam (e1) deviates from the first center line (f1), a boundary line (g) is formed between the surface on which the first weld seam (e1) is located and the transition section (C), and a distance between the first weld seam (e1) and the nearest boundary line (g) is a, where 1 mm ≤ a < 50 mm.;

Description

TECHNICAL AREA

[0001] The present application relates to the technical field of batteries and proposes in particular a battery housing and a battery therewith. BACKGROUND

[0002] In related technologies, prismatic batteries generally refer to batteries with prismatic steel casings, which have a higher energy density and longer lifespan and are therefore widely used in many fields.

[0003] However, the formation process for stainless steel housings requires welding at the housing seams, but due to the high welding temperatures and the insufficient housing strength, deformations of the housing surface can occur, which affects the yield during formation. SUMMARY

[0004] The objective of the present application is to solve at least some of the aforementioned technical problems, and this objective is achieved through the following technical solutions: In a first aspect, the present application proposes a battery housing comprising a circumferential housing body, wherein the housing body includes at least two opposing first side surfaces and at least two opposing second side surfaces, wherein one area of ​​each of the first side surfaces is larger than the area of ​​each of the second side surfaces; the first side surfaces and second side surfaces enclose each other to form a receiving space and form two opening sections at the upper and lower ends, a first side surface or a second side surface forms an interface end and a first weld is formed by welding at the interface end;the adjacent first side surface and second side surface are connected by a transition section, a surface on which the first weld is located has a first center line, wherein the first center line is perpendicular to the opening sections, the first weld deviates from the first center line, a boundary line is formed between the surface on which the first weld is located and the transition section, and a distance a is between the first weld and the nearest boundary line, where 1 mm ≤ a ≤ 50 mm.

[0005] In some embodiments, the first weld is located on the first side surface, where 1 mm ≤ a ≤ 48 mm.

[0006] In some embodiments, the ratio of a length L of the first side surface to a 2 ≤ L / a ≤ 100.

[0007] In some embodiments, the first weld is located on the second side surface, where 1.5 mm ≤ a ≤ 50 mm.

[0008] In some embodiments, the ratio of a width W of the second side surface to a 1 ≤ W / a ≤ 80.

[0009] In some embodiments, the transition section has an arc-shaped edge, and if the arc dimension of the arc-shaped edge is r, then 0.3 ≤ r*a ≤ 80, in units of rad·mm.

[0010] In some embodiments, the hardness of the housing body is b 0.01 ≤ a / b ≤ 0.83, in units of mm / HRB.

[0011] In some embodiments, the housing body is made of steel, where 0.01 ≤ a / b ≤ 0.8, in units of mm / HRB.

[0012] In some embodiments, if the width of the first weld is d, then 0.004 ≤ d / a ≤ 2.

[0013] In some embodiments, the width d of the first weld is 0.2 mm ≤ d ≤ 2 mm.

[0014] In a second aspect, the present application proposes a battery comprising the battery housing of the first aspect, at least one battery cell arranged in the battery housing and a cover plate sealing an opening section of the battery housing.

[0015] In some embodiments, the cover plate and the battery housing are welded together to form a second weld seam.

[0016] In some embodiments, if the penetration depth of the second weld is S and the width of the first weld is d, then it is 0.01 mm. 2 ≤ S*d ≤ 1.8 mm 2 .

[0017] In some embodiments, the second weld and the first weld do not overlap in the vertical direction of the battery, and the second weld is located above the first weld, and a distance N between an upper end of the first weld and the cover plate satisfies 0 mm < N ≤ 0.9 mm.

[0018] In some embodiments, the first weld is located on the second side surface, and the battery cell is a stacked battery cell, and if the total width of the battery cell is W1, then it is 13.8 mm. 2 ≤ W1*a ≤ 3990 mm 2 .

[0019] In some embodiments, the weld is arranged on the second side surface and the battery cell is a wound battery cell, a section of the battery cell corresponding to the second side surface has a second center line, the second center line is perpendicular to the opening sections and the second center line and the first weld are spaced apart in a width direction of the battery.

[0020] In some embodiments, a distance D1 between the second center line and the first weld seam in the width direction of the battery satisfies 0.5 mm ≤ D1 ≤ 40 mm.

[0021] The technical solutions proposed by the present application have at least the following technical effects: In the present application, the transition section of the housing body is located at an edge corner area with a more stable structure, and the weld seam is close to the transition section, which has greater strength. Therefore, the welding process for forming the weld seam does not cause deformation of the battery housing, thus improving the yield of the battery housing formation.

[0022] In particular, the battery casing is formed by stamping or drawing to create the surrounding casing body, which allows for higher manufacturing efficiency. However, after formation, the casing body becomes thinner due to the stamping or drawing processes. If the first weld is located in the center of the casing body surface or too far from the edge, the casing body is prone to deformation after welding, as the central area of ​​the casing body side is the weakest area. This results in poor space utilization and assembly efficiency during battery module formation. The welding process described above positions the first weld near the edge of the casing body, thereby increasing strength at the location of the first weld. High-temperature welding processes prevent the casing body from deforming, thus improving battery module assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To better align the content of the patent specification shown in the accompanying drawings with the content described in the detailed embodiments, a brief introduction to the accompanying drawings of the patent specification is provided below. It is understood that the accompanying drawings of the patent specification mentioned below only illustrate some embodiments of the related technical solutions and the technical solutions of the present application. Without any creative effort, those skilled in the field could also produce accompanying drawings showing other embodiments.

[0024] In particular, the designations of the accompanying drawings of the patent specification are as follows: Fig. Figure 1 is a structural schematic diagram of a battery housing according to some embodiments of the present application; Fig. Figure 2 is a structural schematic diagram of the battery according to some embodiments of the present application; Fig. 3 is an expanded view of the battery according to some embodiments of the present application;

[0025] In particular, the designations of the reference numerals in the accompanying drawings of the patent specification are as follows: 100 - Battery; 110 - Battery casing; 111 - Casing body; A - First side surface; B - Second side surface; C - Transition section; e1 - First weld; e2 - Second weld; f1 - First center line; f2 - Second center line; g - Boundary line; D - Opening section; 120 - Cover plate; 130 - Battery cell. DETAILED DESCRIPTION OF THE EXECUTION FORMS

[0026] To clarify the content of the embodiments of the present application, the following description is given in conjunction with the accompanying drawings of the patent specification. It is understood that the content mentioned below represents only some embodiments of the present application, rather than a complete list of all embodiments. Therefore, other embodiments that can be obtained without creative effort based on the following embodiments fall within the scope of protection of the present application.

[0027] It is understood that the terms used herein serve only to describe specific embodiments and are not intended to strictly limit the technical solutions, unless expressly stated otherwise in the context. For example, the use of "a", "an", and "the" to modify features does not preclude the possibility that such features may occur in a plural form in other embodiments.

[0028] It is understood that terms such as "include," "comprise," and "have" are open-ended and indicate the presence of the named features, but do not preclude the possibility that other features may be present in the embodiment. Likewise, the use of terms such as first, second, etc., to describe multiple features serves only to distinguish one feature from another and, unless otherwise indicated by the context, does not imply any order or sequence.

[0029] It is understood that, unless otherwise indicated by the context, terms such as "arranged," "connected," and "installed" may be interpreted broadly. They may, for example, refer to a fixed connection, a detachable connection, or an integral connection; they may be directly connected or indirectly connected via intermediaries. Experts can understand the specific meanings of these terms in context, based on specific situations.

[0030] In addition, to facilitate description, terms relating to spatial relationships are used to describe the position of one feature relative to another, such as "inner", "outer", "end", "side", "upper", "middle", "lower", "high", "low", "axial", "circumferential", "radial", "horizontal", "vertical", "first direction", "second direction", etc. It is understood that the spatial relationships between two features involve a different specific situation than that shown in the drawings of the patent specification.

[0031] The embodiments of the present application are now described in conjunction with the attached drawings of the patent specification. With reference to Fig. 1 In a first aspect, the present application proposes a battery housing 110 comprising a circumferential housing body 111, wherein the housing body 111 includes at least two opposing first side surfaces A and at least two opposing second side surfaces, wherein one area of ​​each of the first side surfaces is larger than the area of ​​each of the second side surfaces; the first side surfaces and second side surfaces enclose each other to form a receiving space and form two opening sections at the upper and lower ends, a first side surface or a second side surface forms an interface end and a first weld is formed by welding at the interface end;the adjacent first side surface and second side surface are connected by a transition section, a surface on which the first weld is located has a first center line, wherein the first center line is perpendicular to the opening sections, the first weld deviates from the first center line, a boundary line is formed between the surface on which the first weld is located and the transition section, and a distance a is between the first weld and the nearest boundary line, where 1 mm ≤ a ≤ 50 mm.

[0032] In the present application, the transition section C of the housing body 111 is located at an edge corner region with a more stable structure, and the weld e1 is located near the transition section C, which has greater strength, so that the welding to form the first weld e1 does not cause any deformation of the battery housing 110, thereby improving the yield of the formation of the battery housing 110.

[0033] In particular, the battery housing 110 is formed by stamping or drawing to create the housing body 111 by enclosing it, which allows for higher manufacturing efficiency. However, after formation, the housing body 111 becomes thinner due to the stamping or drawing operations. If the first weld e1 is located in the center of the housing body 111's surface or too far from the edge, the housing body 111 deforms slightly after welding because the center of the housing body 111's side is the weakest area. This results in low space utilization and assembly efficiency during battery module formation. The welding method described above positions the first weld e1 near the edge of the housing body 111, thereby increasing the strength at the location of the first weld e1.During high-temperature welding processes, the housing body 111 does not deform, thus improving the efficiency of the battery assembly 100 within the battery module. However, the first weld e1 should not be too close to the transition section C to avoid stress concentrations that could lead to cracks in the first weld e1. Therefore, the distance a between the first weld e1 and the nearest boundary line g should be moderate; for example, a can be 1 mm, 10 mm, 20 mm, or 50 mm.

[0034] In some embodiments, the first weld e1 is located on the first side surface A, where 1 mm ≤ a ≤ 48 mm.

[0035] In some embodiments, the first weld e1 is located on the first side surface A, since the first side surface A has a larger area and is therefore more susceptible to deformation during welding. Consequently, the welding distance to the transition section C should be closer to better reinforce the first weld e1. Therefore, a can be 1 mm, 10 mm, or 48 mm.

[0036] In some embodiments, the ratio of a length L of the first side surface A to a 2 ≤ L / a ≤ 100.

[0037] In some embodiments, the ratio of the length of the first side surface A to the distance between the first weld e1 and the boundary line g should be controlled within a suitable range. If the ratio is too small, this indicates that the distance between the first weld e1 and the boundary line g is too large. During welding, if the first weld e1 is located near the first center line f1 of a surface on which it is situated, this can easily cause deformation of the surface. If the ratio is too large, this indicates that the distance between the first weld e1 and the boundary line g is too small. Due to the higher stress at the transition section C, cracks will form in the first weld e1, impairing the welding effect.Therefore, the value of L / a should be moderate; for example, L / a can be 2, 50, or 100.

[0038] In some embodiments, the first weld e1 is located on the second side surface B, where 1.5 mm ≤ a ≤ 50 mm.

[0039] In some embodiments, the stress in the section near the second side face B of the transition section C adjacent to the second side face B is relatively high when the first weld e1 is located on the second side face B, because the second side face B has a smaller area. If, under high stress, the first weld e1 is too close to the boundary line g, there is a risk that the first weld e1 will fail under the stress. Therefore, compared to when the first weld e1 is located on the first side face A, the distance between the first weld e1 and the transition section C should be slightly greater. Thus, a can be 1.5 mm, 10 mm, or 50 mm.

[0040] In some embodiments, the ratio of a width W of the second side surface B to a 1 ≤ W / a ≤ 80.

[0041] In some embodiments, the ratio of the width of the second side surface B to the distance between the first weld e1 and the boundary line g should be controlled within a suitable range. If the ratio is too small, this indicates that the distance between the first weld e1 and the boundary line g is too large. During welding, if the first weld e1 is located near the first center line f1 of a surface on which it is situated, this can easily cause deformation of the surface. If the ratio is too large, this indicates that the distance between the first weld e1 and the boundary line g is too small. Due to the higher stress at the transition section C, cracks will form in the first weld e1, impairing the welding effect.Therefore, the value of W / a should be moderate; for example, W / a can be 1, 30, or 80.

[0042] It should be noted that the battery 100 refers to Fig. 1. It has a width direction, a length direction, and a height direction. If the width direction is set as the X direction, the length direction as the Y direction, and the height direction as the Z direction, then the X, Y, and Z directions are perpendicular to each other. It is understood that the length of the first face A is the dimension of the first face A along the Y direction, and the width of the second face B is the dimension of the second face B along the X direction.

[0043] In some embodiments, the transition section C includes an arcuate edge, and if the arcuate dimension of the arcuate edge is r, then 0.3 ≤ r*a ≤ 80, in units of rad·mm.

[0044] In some embodiments, the transition section C is arc-shaped and exhibits stresses. If the arc length is small, the stress is high, and the distance between the first weld e1 and the boundary line g must be increased accordingly to prevent the first weld e1 from cracking due to the stress. If the arc length is large, the stress is relatively low, and the distance between the first weld e1 and the boundary line g can be reduced accordingly to better prevent deformation of the housing body 111. Therefore, the value of r*a should be moderate; for example, it can be 0.3, 50, or 80, in units of rad·mm.

[0045] In some embodiments, the hardness of the housing body 111 is b 0.01 ≤ a / b ≤ 0.83, in units of mm / HRB.

[0046] In the embodiments described above, if the housing body 111 has a higher hardness, the distance between the first weld e1 and the boundary line g can be increased; conversely, if the housing body 111 has a lower hardness, the first weld e1 should be located as close as possible to the boundary line g. Therefore, the value of a / b should be moderate; for example, a / b can be 0.01, 0.5, or 0.83.

[0047] In some embodiments, if the housing body 111 is made of steel, 0.01 ≤ a / b ≤ 0.8, in units of mm / HRB.

[0048] Since steel in the above embodiments has a higher hardness, the first weld e1 can be located relatively closer to the boundary line g, so that a / b can be 0.01, 0.1 or 0.8 in units of mm / HRB.

[0049] It is understood that the present application does not strictly restrict the type of steel, which may be carbon steel, alloy steel and other iron-based stainless steel, etc.

[0050] In some embodiments, if the width of the first weld is e1 d, then 0.004 ≤ d / a ≤ 2.

[0051] In the embodiments described above, the transition section C is located at the edge of battery 100, where the stress is high, and high stress can lead to cracks at the weld. The wider the first weld e1, the higher the weld strength, and the first weld e1 can be closer to the boundary line g. Conversely, if the first weld e1 is narrower, it should be further from the boundary line g. Therefore, the value of d / a should be moderate; for example, d / a can be 0.004, 0.1, or 2.

[0052] In some embodiments, the width d of the first weld e1 is in the range of: 0.2 mm ≤ d ≤ 2 mm, where d can be 0.2 mm, 1 mm or 2 mm.

[0053] In a second aspect, the present application proposes a battery 100 comprising the battery housing 110 of the first aspect, at least one battery cell 130 arranged in the battery housing 110 and a cover plate 120 sealing an opening section D of the battery housing 110.

[0054] With reference to Fig. 1 and Fig. 2 the housing body 111 has an opening section D, and the cover plate 120 covers the opening section D in a sealing manner.

[0055] In the embodiments described above, the battery 100 proposed in the second aspect incorporates the battery housing 110 of the first aspect and therefore exhibits at least all the technical effects of the battery housing 110 of the first aspect. The specific technical effects of the battery housing 110 are not repeated here.

[0056] Furthermore, the embodiments described in the present application only refer to the structures relating to the improvements of battery 100 of the present application and do not imply that it cannot have other structures. For example, battery 100 may also include charging and discharging protection devices and / or heat dissipation structures, etc. Other structures are not discussed in detail here.

[0057] In some embodiments, the cover plate 120 and the battery housing 110 are welded together to form a second weld seam e2. It is understood that the second weld seam e2 is, with respect to Fig. 2 is a circular weld seam distributed around the opening section D.

[0058] In some embodiments, if the penetration depth of the second weld is e2 S and the width of the first weld is e1 d, then 0.01 mm 2 ≤ S*d ≤ 1.8 mm 2 .

[0059] In some embodiments, when welding the cover plate 120 to the battery housing 110, the second weld e2, to which the cover plate 120 is welded, has overlapping surfaces with the first weld e1 at the location of the first weld e1. If the penetration depth of the second weld e2 is too deep, the two welds overlap, and heat concentration can easily occur during welding of the second weld e2, resulting in a high risk of weld burn-through. Therefore, the value of S*d should be moderate; for example, S*d can be 0.01 mm. 2 , 1 mm 2 or 1.8 mm 2 be.

[0060] In some embodiments with reference to Fig. 2 overlap in the vertical direction of the battery 100, i.e. in the Z-direction, the second weld e2 and the first weld e1 do not overlap and the second weld e2 is located above the first weld e1 and a distance N between the upper end of the first weld e1 and the cover plate 120 satisfies 0 mm < N ≤ 0.9 mm.

[0061] In some embodiments, there is a certain distance between the upper end of the first weld e1 and the second weld e2. When welding the cover plate 120, the second weld e2 can be performed within this distance, thus preventing burn-through of the weld due to overlapping welding of the two welds. Therefore, the distance N between the upper end of the first weld e1 and the cover plate 120 must be neither too small nor too large, as otherwise it would be difficult to join the two welds in such a way as to achieve a sealing effect. Therefore, the distance between the upper end of the first weld e1 and the cover plate 120 should be moderate; for example, N can be 0.1 mm, 0.5 mm, or 0.9 mm.

[0062] It should be noted that the upper end of the first weld e1 in some embodiments is located with reference to Fig. 1 and Fig. 3 can extend directly to the upper end of the housing body 111. Additionally, in some embodiments, with reference to Fig. 2. There must also be a certain distance between the upper end of the first weld e1 and the upper end of the housing body 111, i.e., the distance N between the upper end of the first weld e1 and the cover plate 120. However, since the second weld e2 has a certain width, after completion of the second weld e2, the upper end of the first weld e1 is connected to the second weld e2 to achieve a seal. In particular, both of the aforementioned embodiments fall within the scope of protection of the present application.

[0063] In some embodiments, the first weld e1 is arranged on the second side surface B and the battery cell 130 is a stacked battery cell and, if the total width of the battery cell 130 is W1, then 13.8 mm 2≤ W1*a ≤ 3990 mm 2 .

[0064] In some embodiments, when the battery cell 130 is a stacked battery cell, its side surface is relatively flat and gas generation is relatively uniform. If the width of the battery cell 130 is greater, gas generation is higher, resulting in a greater expansion force on the housing body 111. To prevent the effects of the housing body 111's expansion on the first weld e1, the distance between the first weld e1 and the boundary line g should be reduced to increase the strength of the first weld e1. Therefore, the value of W1*a should be moderate; for example, W1*a can be 13.8 mm. 2 , 1000 mm 2 or 3990 mm 2 be.

[0065] It should be noted that the width of battery cell 130 is a dimension of battery cell 130 in the X direction. If several battery cells 130 are housed in the battery casing 110, W1 is the cumulative dimension of all battery cells 130 in the X direction, i.e., the total width.

[0066] In some embodiments, the weld e1 is arranged on the second side surface B and the battery cell 130 is a wound battery cell, a section of the battery cell 130 corresponding to the second side surface B has a second center line f2, the second center line f2 is perpendicular to the opening sections D and the second center line f2 and the first weld e1 are spaced apart in a width direction of the battery 100.

[0067] In some embodiments, the wound battery cell is formed by winding positive plates, separators, and negative plates. An arcuate section is formed on the portion of the battery cell 130 corresponding to the second side surface B. This arcuate section has a second centerline f2 that runs perpendicular to the opening sections D. The first weld e1 must be spaced apart from the second centerline f2 to prevent the protruding arcuate section from pressing against the first weld e1 when the battery cell 130 expands.

[0068] In some embodiments, a distance D1 between the second center line f2 and the first weld e1 in the width direction of the battery 100 satisfies 0.5 mm ≤ D1 ≤ 40 mm.

[0069] In some embodiments, if the distance between the second centerline f2 and the first weld e1 is too close, the protruding arc-shaped section presses against the first weld e1 when the battery cell 130 expands. If the distance between the second centerline f2 and the first weld e1 is too far, this indicates that the first weld e1 is too close to the boundary line g, and the stress concentration at the transition section C negatively affects the first weld e1. Therefore, the distance D1 between the second centerline f2 and the first weld e1 should be moderate; for example, D1 can be 0.5 mm, 20 mm, or 40 mm.

[0070] It should be noted that when several battery cells 130 are housed in the battery casing 110, D1 refers to the distance in the X direction between the first weld e1 and the first centerline f1 of the battery cell 130 that is closest to the first weld e1. In particular, with regard to Fig. Figure 3 shows the two wound battery cells.

[0071] In particular, the term “and / or” in this application should be understood as follows: Firstly, when positioned between a first entity and a second entity, the term “and / or” includes any of the following meanings: (1) only the first entity; (2) only the second entity; and (3) both the first entity and the second entity. Secondly, when positioned between the last two entities among three or more entities, the term "and / or" implies that at least one entity is included among those multiple entities. For example, "first entity, second entity and / or third entity" and "first entity and / or second entity and / or third entity" have the same meaning, including, in particular, the following combinations: (1) only the first entity; (2) only the second entity; (3) only the third entity; (4) the first entity and the second entity without the third entity; (5) the first entity and the third entity without the second entity; (6) the second entity and the third entity without the first entity; and (7) the first entity, the second entity, and the third entity.

[0072] Furthermore, although the above content describes embodiments of the present application in conjunction with the accompanying drawings, those skilled in the field may make various modifications and variations without departing from the concept of the present application, and such modifications and variations all fall within the scope of protection of the present application.

Claims

[1] Battery casing, characterized bythat it has a circumferential housing body (111), wherein the housing body (111) has at least two opposing first side surfaces (A) and at least two opposing second side surfaces (B), wherein one area of ​​each of the first side surfaces (A) is larger than one area of ​​each of the second side surfaces (B); the first side surfaces (A) and the second side surfaces (B) enclose each other to form a receiving space and form two opening sections (D) at the upper and lower ends, wherein a first side surface (A) or a second side surface (B) forms an interface end and a first weld (e1) is formed by welding at the interface end;wherein an adjacent first side surface (A) and second side surface (B) are connected by a transition section (C), a surface on which the first weld (e1) is located has a first center line (f1), the first center line (f1) is perpendicular to the opening sections (D), the first weld (e1) deviates from the first center line (f1), a boundary line (g) is formed between the surface on which the first weld (e1) is located and the transition section (C), and a distance between the first weld (e1) and the nearest boundary line (g) is a, where 1 mm ≤ a < 50 mm. [2] Battery housing according to claim 1, characterized by , that the first weld (e1) is located on the first side surface (A), where 1 mm ≤ a ≤ 48 mm. [3] Battery housing according to claim 2, characterized by , that a ratio of a length L of the first side surface (A) to a 2 ≤ L / a ≤ 100. [4] Battery housing according to claim 1, characterized by , that the first weld (e1) is located on the second side surface (B), where 1.5 mm ≤ a ≤ 50 mm. [5] Battery housing according to claim 4, characterized by , that the ratio of a width W of the second side surface (B) to a 1 ≤ W / a ≤ 80 is. [6] Battery housing according to any one of claims 1 to 5, characterized by , that the transition section (C) has an arc-shaped edge, and if the arc measure of the arc-shaped edge is r, then 0.3 ≤ r*a ≤ 80, in units of rad·mm. [7] Battery housing according to any one of the preceding claims, characterized by , that for a hardness of the housing body (111) of b 0.01 ≤ a / b ≤ 0.83, in units of mm / HRB. [8] Battery housing according to any one of claims 2 to 7, characterized by , that the housing body (111) is made of steel, where 0.01 ≤ a / b ≤ 0.8, in units of mm / HRB. [9] Battery housing according to any one of the preceding claims, characterized by, that if a width W of the first weld (e1) is d, then 0.004 ≤ d / a ≤ 2. [10] Battery housing according to claim 9, characterized by , that the width d of the first weld (e1) is 0.2 mm ≤ d ≤ 2 mm. [11] Battery, characterized by , that it comprises the battery housing (110) according to one of claims 1 to 10, at least one battery cell (130) arranged inside the battery housing (110), and cover plates (120) sealing an opening section (D) of the battery housing (110). [12] Battery according to claim 11, characterized by , that the cover plate (120) and the battery housing (110) are welded together to form a second weld seam (e2). [13] Battery according to claim 12, characterized by , that if the penetration depth of the second weld (e2) is S and the width of the first weld (e1) is d, then 0.01 mm 2 ≤ S*d ≤ 1.8 mm 2 . [14] Battery according to claim 13, characterized by , that in the vertical direction of the battery (100) the second weld (e2) and the first weld (e1) do not overlap and the second weld (e2) is located above the first weld (e1) and a distance N between an upper end of the first weld (e1) and the cover plate (120) 0 mm < N ≤ 0.9 mm is satisfied. [15] Battery according to claim 11, characterized by , that the first weld (e1) is located on the second side surface (B) and the battery cell (130) is a stacked battery cell, and if the total width of the battery cell (130) is W1, then 13.8 mm 2 ≤ W1*a ≤ 3990 mm 2 . [16] Battery according to claim 11, characterized by, that the first weld (e1) is located on the second side surface (B) and the battery cell (130) is a wound battery cell, a section of the battery cell (130) corresponding to the second side surface (B) has a second center line (f2), the second center line (f2) is perpendicular to the opening sections (D) and the second center line (f2) and the first weld (e1) are spaced apart in a width direction of the battery (100). [17] Battery according to claim 16, characterized by , that a distance D1 between the second center line (f2) and the first weld (e1) in the width direction of the battery (100) 0.5 mm ≤ D1 ≤ 40 mm is satisfied.

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