Battery

Abstract

The utility model relates to the technical field of batteries, and provides a battery, which comprises a pole structure, the battery shell comprises a cover plate, the cover plate comprises a main body and an extension section, the main body is arranged around the extension section, the wall thickness of the main body is greater than that of the extension section, and the pole structure is arranged in the pole through hole in a penetrating manner; the fixing part is arranged on the main body, the fixing part is arranged around the extension section, the fixing part is bent into a connecting section and a pressing section, the connecting section is arranged on the main body, and the pressing section is pressed on the pole structure, so that the pole structure is clamped between the pressing section and the extension section; wherein the cover plate and the fixing part are of an integrally-formed structure, the distance between one side, facing the pole structure, of the extending section and the outer surface of the main body in the direction perpendicular to the cover plate is H, and H is larger than or equal to 0.2 mm and smaller than or equal to 1 mm, so that when the cover plate and the fixing part are integrally formed, the structural strength of the fixing part and the extending section can be guaranteed, and reliable fixing of the pole structure is guaranteed; therefore, the safe use performance of the battery is improved.

Description

Technical Field

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

[0002] In the related art, a pole structure may be provided on the battery housing, and the pole structure may be fixed to the battery housing. Due to the structural limitations of the pole structure and the battery housing, the structural strength of the battery housing may not be guaranteed, affecting the safety performance of the battery. Utility Model Content

[0003] The utility model provides a battery to improve the use performance of the battery.

[0004] The utility model provides a battery, comprising:

[0005] Pole structure;

[0006] The battery housing comprises a cover plate, the cover plate comprises a main body and an extension section, the main body is arranged around the extension section, the wall thickness of the main body is greater than the wall thickness of the extension section, a pole through hole is arranged on the extension section, and the pole structure is penetrated in the pole through hole;

[0007] A fixing portion, which is arranged on the main body, is arranged around the extension section, is bent into a connecting section and a pressing section, the connecting section is arranged on the main body, and the pressing section is pressed on the pole structure, so that the pole structure is clamped between the pressing section and the extension section;

[0008] The cover plate and the fixing portion are an integrally formed structure. Along a direction perpendicular to the cover plate, a distance between a side of the extension section facing the pole structure and an outer surface of the main body is H, and 0.2 mm ≤ H ≤ 1 mm.

[0009] The battery of the utility model embodiment includes a pole structure, a battery shell and a fixing part. The pole structure is arranged on the battery shell, and the fixing part is arranged on the battery shell, so that the battery shell and the fixing part can form a fixation for the pole structure, thereby preventing the pole structure from being separated from the battery shell and improving the stability of the pole structure. The cover plate of the battery shell includes a main body and an extension section, the wall thickness of the main body is greater than the wall thickness of the extension section, and the fixing part is arranged on the main body. By bending the fixing part into a connecting section and a pressing section, the pressing section can be pressed on the pole structure, thereby the pole structure is clamped between the pressing section and the extension section, thereby ensuring the safety and stability of the pole structure. The cover plate and the fixing part are an integrated structure, which can not only ensure the structural strength of the cover plate and the fixing part, but also ensure the manufacturing efficiency of the battery shell. In the direction perpendicular to the cover plate, the distance between the side of the extension section facing the pole structure and the outer surface of the main body is H, 0.2mm≤H≤1mm, thereby ensuring the structural strength of the fixing part and the extension section when the cover plate and the fixing part are integrally formed, thereby ensuring reliable fixation of the pole structure, thereby improving the safe use performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to better understand the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may have different arrangements as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each drawing. Among them:

[0011] Figure 1 is a schematic structural diagram of a battery according to an exemplary embodiment;

[0012] Figure 2 is a schematic diagram of a partial cross-sectional structure of a battery according to an exemplary embodiment.

[0013] The following are the descriptions of the reference numerals:

[0014] 10. Pole structure; 20. Battery housing; 21. Cover plate; 211. Main body; 2111. Outer surface; 212. Extension section; 22. Pole through hole; 23. Housing member; 30. Fixing portion; 31. Connecting section; 32. Pressing section; 40. Insulating member. DETAILED DESCRIPTION

[0015] The following will be combined with the accompanying drawings in the exemplary embodiments of the present disclosure to clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present disclosure.

[0016] In the description of the present disclosure, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more; the term "and / or" includes any and all combinations of one or more associated listed items. In particular, reference to "the / the" object or "an" object is also intended to indicate one of a possible plurality of such objects.

[0017] Unless otherwise specified or explained, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0018] Further, in the description of the present disclosure, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present disclosure are described at the angles shown in the accompanying drawings and should not be understood as limitations on the exemplary embodiments of the present disclosure. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to another element (one or more) "upper", "lower", or "inner", "outer", it can not only be directly connected to the other (one or more) elements "upper", "lower", "inner", "outer", but also can be indirectly connected to the other (one or more) elements "upper", "lower", "inner", "outer" through an intermediate element.

[0019] An embodiment of the present invention provides a battery. Figure 1 and Figure 2The battery comprises: a pole structure 10; a battery housing 20, the battery housing 20 comprises a cover plate 21, the cover plate 21 comprises a main body 211 and an extension section 212, the main body 211 is arranged around the extension section 212, the wall thickness of the main body 211 is greater than the wall thickness of the extension section 212, the extension section 212 is provided with a pole through hole 22, the pole structure 10 is penetrated in the pole through hole 22; a fixing portion 30, the fixing portion 30 is arranged on the main body 211, the fixing portion 30 is arranged around the extension section 212, and the fixing portion 30 is fixed. The portion 30 is bent into a connecting section 31 and a pressing section 32, the connecting section 31 is arranged on the main body 211, and the pressing section 32 is pressed on the pole structure 10, so that the pole structure 10 is clamped between the pressing section 32 and the extending section 212; wherein, the cover plate 21 and the fixing portion 30 are an integrally formed structure, and along a direction perpendicular to the cover plate 21, a distance between a side of the extending section 212 facing the pole structure 10 and an outer surface 2111 of the main body 211 is H, 0.2mm≤H≤1mm.

[0020] A battery of one embodiment of the utility model includes a pole structure 10, a battery housing 20 and a fixing portion 30, wherein the pole structure 10 is arranged on the battery housing 20, and the fixing portion 30 is arranged on the battery housing 20, so that the battery housing 20 and the fixing portion 30 can fix the pole structure 10, thereby preventing the pole structure 10 from being separated from the battery housing 20, and improving the stability of the pole structure 10. The cover plate 21 of the battery housing 20 includes a main body 211 and an extension section 212, wherein the wall thickness of the main body 211 is greater than the wall thickness of the extension section 212, and the fixing portion 30 is arranged on the main body 211, and by bending the fixing portion 30 into a connecting section 31 and a pressing section 32, the pressing section 32 can be pressed on the pole structure 10, thereby clamping the pole structure 10 between the pressing section 32 and the extension section 212, thereby ensuring the safety and stability of the pole structure 10. The cover plate 21 and the fixing portion 30 are an integrally formed structure, which can not only ensure the structural strength of the cover plate 21 and the fixing portion 30, but also ensure the manufacturing efficiency of the battery housing 20. In the direction perpendicular to the cover plate 21, the distance between the side of the extension section 212 facing the pole structure 10 and the outer surface 2111 of the main body 211 is H, 0.2mm≤H≤1mm, so that when the cover plate 21 and the fixing portion 30 are integrally formed, the structural strength of the fixing portion 30 and the extension section 212 can be ensured, thereby ensuring the reliable fixation of the pole structure 10, thereby improving the safe use performance of the battery.

[0021] It should be noted that, combined with Figure 1 and Figure 2As shown, the battery housing 20 includes a cover plate 21, a main body 211 is arranged around an extension section 212, the extension section 212 is formed with a pole through hole 22, and the pole structure 10 is inserted into the pole through hole 22. The fixing portion 30 is bent into a connecting section 31 and a pressing section 32, the connecting section 31 is arranged on the main body 211, and the pressing section 32 is pressed on the pole structure 10, so that the pole structure 10 is clamped between the pressing section 32 and the extension section 212, thereby preventing the pole structure 10 from detaching from the battery housing 20, thereby ensuring the safe use performance of the battery.

[0022] like Figure 1 As shown, the battery includes a pole structure 10 and a battery housing 20 . The pole structure 10 is disposed on the battery housing 20 . There may be two pole structures 10 , and the two pole structures 10 are disposed on the battery housing 20 at intervals.

[0023] like Figure 2 As shown, a pole through hole 22 is provided on the battery housing 20, and the pole structure 10 is inserted into the pole through hole 22, thereby the pole structure 10 is set on the battery housing 20, and the pole structure 10 and the battery housing 20 can be insulated. For example, the pole structure 10 and the battery housing 20 can be insulated by an insulating structure, or the pole structure 10 and the battery housing 20 can be insulated by an insulating coating.

[0024] Combination Figure 2 As shown, along the direction perpendicular to the cover plate 21, the direction perpendicular to the cover plate 21 can be considered as the extension direction of the pole through hole 22, and the distance between the side of the extension section 212 facing the pole structure 10 and the outer surface 2111 of the main body 211 can be expressed as H. Considering that the cover plate 21 and the fixing portion 30 are an integrally formed structure, for example, the cover plate 21 and the fixing portion 30 can be formed by stamping, rolling, etc., when the thickness of the main body 211 of the cover plate 21 is fixed, the smaller the distance H between the side of the extension section 212 facing the pole structure 10 and the outer surface 2111 of the main body 211 is, the thinner the fixing portion 30 is, thereby the structural strength of the fixing portion 30 may not be guaranteed, and the accommodating space between the fixing portion 30 and the extension section 212 will be affected, which is not conducive to the storage of the pole structure 10. The larger the distance H between the side of the extension section 212 facing the pole structure 10 and the outer surface 2111 of the main body 211, the thicker the fixing portion 30 is and the thinner the extension section 212 is, which will affect the structural strength of the extension section 212 and may fail to ensure the safety performance of the battery.

[0025] In one embodiment, the distance between the side of the extension section 212 facing the pole structure 10 and the outer surface 2111 of the main body 211 is H, 0.3mm≤H≤0.8mm, so that the thickness of the fixing portion 30 and the extension section 212 can be effectively controlled, thereby ensuring the structural strength of the fixing portion 30 and the extension section 212, and avoiding the failure to form fixed protection for the pole structure 10.

[0026] It should be noted that the distance H between the side of the extension section 212 facing the pole structure 10 and the outer surface 2111 of the main body 211 can be 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm or 1mm, etc.

[0027] In one embodiment, the thickness of the main body 211 is n, 1mm≤n≤3.5mm, thereby the thickness of the main body 211 can be reliably controlled to ensure the structural strength of the main body 211 and avoid the battery housing 20 occupying too much space and affecting the energy density of the battery.

[0028] In one embodiment, the thickness of the main body 211 is n, 1.2 mm ≤ n ≤ 2.5 mm. On the basis of ensuring the structural strength of the main body 211 , the energy density of the battery can also be controlled to improve the performance of the battery.

[0029] It should be noted that, combined with Figure 2 As shown, the thickness of the main body 211 can be expressed as n, and the thickness n of the main body 211 can be 1mm, 1.05mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm or 3.5mm, etc.

[0030] In one embodiment, the thickness of the extension section 212 is b, 0.6mm≤b≤1.5mm, which can not only ensure the structural strength of the extension section 212, but also control the one-piece fixed portion 30 to have reliable structural strength, thereby ensuring that the fixed portion 30 and the extension section 212 form a fixed protection for the pole structure 10.

[0031] Combination Figure 2As shown, the thickness of the extension section 212 can be expressed as b. The thickness of the extension section 212 cannot be too large. If it is too large, it is easy to cause less material at the fixing part 30, affecting the structural strength of the fixing part 30. The thickness of the extension section 212 cannot be too small. If it is too small, the extension section 212 is easy to deform during the rolling process of the pole structure 10, thereby affecting the safety performance of the battery.

[0032] The thickness b of the extension section 212 may be 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, 0.8 mm, 0.85 mm, 0.9 mm, 0.95 mm, 1 mm, 1.05 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm or 1.5 mm, etc.

[0033] In one embodiment, the thickness of the extension section 212 is b, 0.1≤H / b≤1.5, so that the structural strength of the extension section 212 and the fixing portion 30 can be effectively controlled to avoid a large difference in thickness between the two, thereby affecting the fixation of the pole structure 10 .

[0034] The ratio of the distance H between the side of the extension section 212 facing the pole structure 10 and the outer surface 2111 of the main body 211 to the thickness b of the extension section 212 is too large, the extension section 212 is too thin, and the structural strength is insufficient; while the ratio of the distance H between the side of the extension section 212 facing the pole structure 10 and the outer surface 2111 of the main body 211 to the thickness b of the extension section 212 is too small, the material of the integrally formed fixing portion 30 is relatively small, which is not conducive to ensuring the structural strength of the fixing portion 30.

[0035] In one embodiment, the distance between the side of the extension section 212 facing the pole structure 10 and the outer surface 2111 of the main body 211 is H, the thickness of the extension section 212 is b, 0.3≤H / b≤1, so that the structural strength of the extension section 212 and the fixing portion 30 can be reliably controlled, thereby effectively fixing the pole structure 10, and the risk of breakage is not likely to occur.

[0036] It should be noted that the ratio of the distance H between the side of the extension section 212 facing the pole structure 10 and the outer surface 2111 of the main body 211 to the thickness b of the extension section 212 can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4 or 1.5, etc.

[0037] In one embodiment, the thickness of the extension section 212 is b, and the length of the extension section 212 extending from the main body 211 is c, 1≤c / b≤8. On the basis of ensuring that the extension section 212 forms a reliable support for the pole structure 10, the risk of the extension section 212 breaking due to insufficient structural strength can also be avoided, thereby ensuring the safe use performance of the battery.

[0038] Combination Figure 2 As shown, the length of the extension section 212 extending from the main body 211 can be expressed as c, and the ratio of the length c of the extension section 212 extending from the main body 211 to the thickness b of the extension section 212 is too large, the length c of the extension section 212 is long, and the thickness b of the extension section 212 crimped by the pole structure 10 is thin. During the rolling process of the fixing portion 30, the extension section 212 is easily deformed, which affects the fixing strength of the pole structure 10. If the ratio of the length c of the extension section 212 extending from the main body 211 to the thickness b of the extension section 212 is too small, the support area of ​​the extension section 212 for the pole structure 10 will be relatively small, which is not conducive to stopping the downward displacement of the pole structure 10, and further not conducive to ensuring the fixing stability of the pole structure 10.

[0039] In one embodiment, the thickness of the extension section 212 is b, the length of the extension section 212 extending from the main body 211 is c, and 2.5≤c / b≤5, thereby effectively ensuring the support of the extension section 212 for the pole structure 10, and also effectively controlling the structural strength of the extension section 212, thereby ensuring the fixation of the fixing portion 30 and the extension section 212 to the pole structure 10.

[0040] It should be noted that the ratio of the length c of the extension section 212 extending from the main body 211 to the thickness b of the extension section 212 can be 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9 , 4, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7, 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9 or 8, etc.

[0041] In one embodiment, along the direction perpendicular to the cover plate 21, the orthographic projections of the extension section 212 and the pole structure 10 on the same plane have overlapping projections, and along the direction parallel to the cover plate 21, the length dimension of the overlapping projection is d, 1mm≤d≤4.5mm, thereby ensuring the supporting area of ​​the extension section 212 for the pole structure 10, thereby ensuring the stability of the pole structure 10, avoiding the risk of the pole structure 10 detaching from the battery housing 20, and effectively improving the safe use performance of the battery.

[0042] Combination Figure 2 As shown, along the direction perpendicular to the cover plate 21, the length dimension of the overlapping projection of the extension section 212 and the positive projection of the pole structure 10 on the same plane can be expressed as d, and the length dimension d of the overlapping projection can be 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4mm, 4.1mm, 4.2mm, 4.3mm, 4.4mm or 4.5mm, etc.

[0043] The direction perpendicular to the cover plate 21 can be considered as the direction perpendicular to the large surface of the cover plate 21 , and the direction parallel to the cover plate 21 can be considered as the direction parallel to the large surface of the cover plate 21 .

[0044] In one embodiment, along the direction perpendicular to the cover plate 21, the distance between the pole structure 10 and the extension section 212 is 0.55 mm-1 mm; wherein the battery further includes an insulating member 40, at least a portion of which is disposed between the pole structure 10 and the extension section 212, thereby enabling the insulating member 40 to form insulation protection between the pole structure 10 and the extension section 212, thereby ensuring the creepage distance between the pole structure 10 and the extension section 212, and thereby improving the safe use performance of the battery.

[0045] In a direction perpendicular to the cover plate 21 , the distance between the pole structure 10 and the extension section 212 may be 0.55 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, 0.8 mm, 0.85 mm, 0.9 mm, 0.95 mm or 1 mm, etc.

[0046] The insulating member 40 may be an integrally formed plastic structure, or the insulating member 40 may include a separately arranged plastic insulating member and a sealing member, etc. The specific structure of the insulating member 40 is not limited herein.

[0047] In one embodiment, Figure 1 and Figure 2 As shown, the battery housing 20 includes a cover plate 21 and a housing member 23 , the cover plate 21 and the housing member 23 are connected, a fixing portion 30 is provided on the cover plate 21 , and the cover plate 21 and the housing member 23 can be connected by welding.

[0048] It should be noted that the battery includes a cell and an electrolyte, which is the smallest unit capable of performing electrochemical reactions such as charge / discharge. A cell refers to a unit formed by winding or laminating a stacked portion, the stacked portion including a first pole sheet, a separator, and a second pole sheet. When the first pole sheet is a positive pole sheet, the second pole sheet is a negative pole sheet. The polarities of the first pole sheet and the second pole sheet can be interchanged. The first pole sheet and the second pole sheet are coated with an active material.

[0049] The battery cell can be electrically connected to the pole structure 10 , and the pole tab of the battery cell can be electrically connected to the pole structure 10 through an adapter.

[0050] In one embodiment, the battery may be a quadrangular prism battery. A quadrangular prism battery mainly refers to a battery having a prism shape, but it is not strictly limited whether each side of the prism must be a straight line in the strict sense, and the corners between the sides are not necessarily right angles, and can be arc transitions.

[0051] The battery can be a laminated battery, which is not only convenient to group, but also can be processed to obtain a longer battery. Specifically, the battery cell is a laminated battery cell, which has a first pole piece stacked on top of each other, a second pole piece with electrical properties opposite to the first pole piece, and a diaphragm sheet arranged between the first pole piece and the second pole piece, so that multiple pairs of first pole pieces and second pole pieces are stacked to form a laminated battery cell.

[0052] Alternatively, the battery may be a wound battery, that is, a first pole sheet, a second pole sheet with electrical properties opposite to the first pole sheet, and a diaphragm sheet arranged between the first pole sheet and the second pole sheet are wound to obtain a wound battery cell.

[0053] In one embodiment, the battery may be a cylindrical battery, or the battery may be a hexagonal prism battery. The battery may be a wound battery, that is, a first pole piece, a second pole piece with electrical properties opposite to the first pole piece, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery cell.

[0054] An embodiment of the utility model further provides a battery pack, which includes batteries.

[0055] The battery of the battery pack of one embodiment of the utility model comprises a pole structure 10, a battery housing 20 and a fixing portion 30, wherein the pole structure 10 is arranged on the battery housing 20, and the fixing portion 30 is arranged on the battery housing 20, so that the battery housing 20 and the fixing portion 30 can form a fixing for the pole structure 10, thereby preventing the pole structure 10 from being separated from the battery housing 20, and improving the stability of the pole structure 10. The cover plate 21 of the battery housing 20 comprises a main body 211 and an extension section 212, wherein the wall thickness of the main body 211 is greater than the wall thickness of the extension section 212, and the fixing portion 30 is arranged on the main body 211, and by bending the fixing portion 30 into a connecting section 31 and a pressing section 32, the pressing section 32 can be pressed on the pole structure 10, thereby clamping the pole structure 10 between the pressing section 32 and the extension section 212, thereby ensuring the safety and stability of the pole structure 10. The cover plate 21 and the fixing portion 30 are an integrally formed structure, which can not only ensure the structural strength of the cover plate 21 and the fixing portion 30, but also ensure the manufacturing efficiency of the battery housing 20. In the direction perpendicular to the cover plate 21, the distance between the side of the extension section 212 facing the pole structure 10 and the outer surface 2111 of the main body 211 is H, 0.2mm≤H≤1mm, so that when the cover plate 21 and the fixing portion 30 are integrally formed, the structural strength of the fixing portion 30 and the extension section 212 can be ensured, thereby ensuring the reliable fixation of the pole structure 10, thereby improving the safe use performance of the battery pack.

[0056] In one embodiment, the battery pack is a battery module or a battery pack.

[0057] The battery module includes a plurality of batteries, and the battery module may further include an end plate and a side plate, and the end plate and the side plate are used to fix the plurality of batteries.

[0058] It should be noted that multiple batteries can be arranged in a battery box after forming a battery module, and multiple batteries can be fixed by end plates and side plates. Multiple batteries can be directly arranged in the battery box, that is, there is no need to group multiple batteries, in which case the end plates and side plates can be removed.

[0059] Those skilled in the art will readily come up with other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. The present disclosure is intended to cover any variation, use or adaptation of the present utility model, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and example embodiments are to be regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0060] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from its scope. The scope of protection of the present disclosure is limited only by the appended claims.

Claims

1. A battery, characterized in that: include: Pole structure (10); A battery housing (20), the battery housing (20) comprising a cover plate (21), the cover plate (21) comprising a main body (211) and an extension section (212), the main body (211) being arranged around the extension section (212), the wall thickness of the main body (211) being greater than the wall thickness of the extension section (212), the extension section (212) being provided with a pole through hole (22), the pole structure (10) being passed through the pole through hole (22); a fixing portion (30), the fixing portion (30) being arranged on the main body (211), the fixing portion (30) being arranged around the extension section (212), the fixing portion (30) being bent into a connecting section (31) and a pressing section (32), the connecting section (31) being arranged on the main body (211), and the pressing section (32) being pressed on the pole structure (10), so that the pole structure (10) is clamped between the pressing section (32) and the extension section (212); The cover plate (21) and the fixing portion (30) are integrally formed structures, and along a direction perpendicular to the cover plate (21), a distance between a side of the extension section (212) facing the pole structure (10) and an outer surface (2111) of the main body (211) is H, and 0.2 mm ≤ H ≤ 1 mm.

2. The battery according to claim 1, characterized in that 0.3mm≤H≤0.8mm.

3. The battery according to claim 1, characterized in that The thickness of the main body (211) is n, 1mm≤n≤3.5mm.

4. The battery according to claim 3, characterized in that 1.2mm≤n≤2.5mm.

5. The battery according to claim 1, characterized in that The thickness of the extension section (212) is b, 0.6 mm ≤ b ≤ 1.5 mm.

6. The battery according to claim 1, characterized in that The thickness of the extension section (212) is b, 0.1≤H / b≤1.

5.

7. The battery according to claim 6, characterized in that 0.3≤H / b≤1.

8. The battery according to claim 1, characterized in that The thickness of the extension section (212) is b, the length of the extension section (212) extending from the main body (211) is c, and 1≤c / b≤8.

9. The battery according to claim 8, characterized in that 2.5≤c / b≤5.

10. The battery according to any one of claims 1 to 9, characterized in that In a direction perpendicular to the cover plate (21), the orthographic projections of the extension section (212) and the pole structure (10) on the same plane have overlapping projections, and in a direction parallel to the cover plate (21), the length dimension of the overlapping projection is d, 1 mm ≤ d ≤ 4.5 mm.

11. The battery according to any one of claims 1 to 9, characterized in that Along a direction perpendicular to the cover plate (21), the distance between the pole structure (10) and the extension section (212) is 0.55 mm-1 mm; The battery further comprises an insulating member (40), at least a portion of which is disposed between the pole structure (10) and the extension section (212).

12. The battery according to any one of claims 1 to 9, characterized in that The battery is a quadrangular prism battery.

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