Battery and battery device

Abstract

The utility model relates to the technical field of batteries, in particular to a battery and a battery device.The battery comprises a shell, a battery cell and a pole assembly, the shell is internally provided with a containing space, and a mounting hole is formed in a first panel of the shell; the battery cell is arranged in the accommodating space; the pole assembly is arranged in the mounting hole in a penetrating manner, and the pole assembly is connected with the battery cell. Wherein the first panel is provided with a fixing part, the fixing part surrounds the mounting hole, the fixing part comprises a cantilever and a rolling edge, the cantilever is arranged on the side wall of the mounting hole, the rolling edge is arranged on the side, away from the battery cell, of the cantilever, and the rolling edge is bent into a connecting section and an abutting section; a spacing part is formed between the pressing section and the cantilever, at least part of the pole assembly is located at the spacing part, the length of the rolled edge is L1, the length of the cantilever is L2, and L1 / L2 is larger than or equal to 0.1 and smaller than or equal to 10.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a battery and a battery device. Background Art

[0002] A battery device is often provided in an electric vehicle, and the battery device is used to provide power to the electric vehicle. The battery device is provided with at least one battery, and the battery includes a housing, a battery cell and a pole. The battery cell is provided in the housing, and the pole is provided in the housing, and the pole and the battery cell are connected. In the related art, the pole is connected to the through hole on the housing, and the connection stability is poor. During the use of the battery device, the battery is subjected to vibration or impact, etc., which makes the pole easy to fall off, thereby causing the battery device to malfunction.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] The purpose of the present disclosure is to provide a battery and a battery device, thereby improving the connection stability between the pole and the shell in the battery at least to a certain extent.

[0005] According to one aspect of the present disclosure, there is provided a battery, comprising:

[0006] A housing, wherein the housing has a containing space, and a mounting hole is provided on a first panel of the housing;

[0007] A battery cell, wherein the battery cell is arranged in the accommodating space;

[0008] A pole assembly, wherein the pole assembly is inserted into the mounting hole and connected to the battery cell;

[0009] Among them, a fixing portion is provided on the first panel, and the fixing portion surrounds the mounting hole. The fixing portion includes a cantilever and a rolled edge. The cantilever is provided on the side wall of the mounting hole, and the rolled edge is provided on the side of the cantilever away from the battery core, and the rolled edge is bent into a connecting section and a pressing section, and a spacer is formed between the pressing section and the cantilever, and the pole assembly is at least partially located in the spacer. The length of the rolled edge is L1, and the length of the cantilever is L2, 0.1≤L1 / L2≤10.

[0010] According to another aspect of the present disclosure, a battery device is provided, comprising the above-mentioned battery.

[0011] The battery provided by the embodiment of the present disclosure includes a shell, a battery cell and a pole assembly, wherein the shell has a containing space, the battery cell is arranged in the containing space, the pole assembly is passed through the mounting hole on the first panel of the shell, a fixing portion is arranged on the first panel, the fixing portion surrounds the mounting hole, the fixing portion includes a cantilever and a roll edge, the cantilever is arranged on the side wall of the mounting hole, the roll edge is arranged on the side of the cantilever away from the battery cell, and the roll edge is bent into a connecting section and a pressing section, a spacer is formed between the pressing section and the cantilever, and the pole assembly is at least partially located in the spacer, that is, the pole assembly is at least partially sandwiched between the cantilever and the pressing section, which improves the connection stability between the pole assembly and the shell, thereby improving the service life of the battery. Further, the ratio of the length L1 of the roll edge to the length L2 of the cantilever is in the range of 0.1-10, which, on the one hand, avoids the problem of a large amount of metal chips generated during the processing due to the excessively long roll edge length, thereby affecting the electrical connection performance of the battery, and on the other hand, avoids the problem of the cantilever strength being weakened due to the excessively long cantilever.

[0012] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0014] Figure 1 A schematic diagram of a battery structure provided for an exemplary embodiment of the present disclosure;

[0015] Figure 2 A schematic cross-sectional view of a battery provided for an exemplary embodiment of the present disclosure;

[0016] Figure 3 A partial enlarged view of a battery provided for an exemplary embodiment of the present disclosure;

[0017] Figure 4 A schematic structural diagram of a battery device provided by an exemplary embodiment of the present disclosure.

[0018] Description of reference numerals:

[0019] 100, battery; 10, shell; 11, shell body; 12, cover plate; 20, pole assembly; 21, pole; 22, insulating member; 30, battery cell; 40, fixing portion; 41, cantilever; 42, rolled edge; 421, connecting section; 422, pressing section; 200, box body; 210, bottom plate; 220, structural beam. DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] The exemplary embodiment of the present disclosure first provides a battery 100, such as Figure 1 and Figure 2 As shown, the battery comprises a housing 10, a battery cell 30 and a pole assembly 20. The housing 10 has a containing space, and a mounting hole is provided on the first panel of the housing 10. The battery cell 30 is provided in the containing space. The pole assembly 20 is passed through the mounting hole, and the pole assembly 20 and the battery cell 30 are connected. Figure 3As shown, a fixing portion 40 is provided on the first panel, and the fixing portion 40 surrounds the mounting hole. The fixing portion 40 includes a cantilever 41 and a rolled edge 42. The cantilever 41 is provided on the side wall of the mounting hole, and the rolled edge 42 is provided on the side of the cantilever 41 away from the battery cell 30, and the rolled edge 42 is bent into a connecting section 421 and a pressing section 422, and a spacer is formed between the pressing section 422 and the cantilever 41, and the pole assembly 20 is at least partially located in the spacer. The length of the rolled edge 42 is L1, and the length of the cantilever 41 is L2, 0.1≤L1 / L2≤10.

[0025] The battery 100 provided in the embodiment of the present disclosure includes a shell 10, a battery cell 30 and a pole assembly 20. The shell 10 has a accommodating space, the battery cell 30 is arranged in the accommodating space, the pole assembly 20 passes through a mounting hole on a first panel of the shell 10, and a fixing portion 40 is provided on the first panel. The fixing portion 40 surrounds the mounting hole, the fixing portion 40 includes a cantilever 41 and a rolled edge 42, the cantilever 41 is arranged on a side wall of the mounting hole, the rolled edge 42 is arranged on a side of the cantilever 41 away from the battery cell 30, and the rolled edge 42 is bent into a connecting section 421 and a pressing section 422, a spacer is formed between the pressing section 422 and the cantilever 41, and the pole assembly 20 is at least partially located in the spacer, that is, the pole assembly 20 is at least partially sandwiched between the cantilever 41 and the pressing section 422, thereby improving the connection stability between the pole assembly 20 and the shell 10, thereby improving the service life of the battery 100. Furthermore, the ratio of the length L1 of the roll edge 42 to the length L2 of the cantilever 41 is in the range of 0.1-10. On the one hand, it avoids the problem of a large amount of metal chips generated during the processing due to the excessive length of the roll edge 42, which affects the electrical connection performance of the battery 100. On the other hand, it avoids the problem of weakened strength of the cantilever 41 due to the excessive length of the cantilever 41.

[0026] The following is a detailed description of each part of the battery 100 provided in the embodiment of the present disclosure:

[0027] The housing 10 is used to form the outline of the battery 100 and protect the battery cell 30 and electrolyte and other components inside the battery 100. The housing 10 has a storage space inside, and the storage space is used to store the battery cell 30 and the electrolyte and the like. The first panel of the housing 10 is provided with a mounting hole, and the mounting hole is used to install the pole assembly 20. The first panel is any panel of the housing 10 of the battery 100.

[0028] The shell 10 may include a shell body 11 and a cover plate 12, wherein the shell body 11 is provided with an accommodation space having an opening, and the cover plate 12 is sealed to the shell body 11. The shell body 11 includes an end plate and a side frame, wherein the end plate and the cover plate 12 are arranged opposite to each other, and the side frame is arranged between the cover plate 12 and the end plate. The end plate and the side frame may be an integrally formed structure, for example, the shell body 11 is formed by stamping, and of course in practical applications, the end plate and the side frame may also be a split-formed structure, and the embodiments of the present disclosure are not limited thereto.

[0029] In a feasible implementation, the battery 100 may be a quadrangular prism battery 100 (rectangular parallelepiped battery 100), and the side frame includes four side panels connected in sequence. The four side panels include two first side panels and two second side panels, the two first side panels are opposite to each other, the two second side panels are opposite to each other, the area of ​​the first side panel is greater than the area of ​​the second side panel, and the area of ​​the first side panel is greater than the area of ​​the cover panel 12.

[0030] On this basis, the first panel of the housing 10 can be a cover plate 12, an end plate or a side plate. That is, the mounting hole and the fixing portion 40 can be provided on the cover plate 12, the end plate or the side plate. For example, the mounting hole and the fixing portion 40 are provided on the cover plate 12, that is, the pole 21 is provided on the cover plate 12.

[0031] In another feasible embodiment, the battery 100 may also be a cylindrical battery 100, the side frame is a hollow columnar structure, and the cover plate 12 and the end plate are respectively sealed at both ends of the side frame. The first panel of the housing 10 is one of the cover plate 12 or the end plate.

[0032] The first panel is provided with a mounting hole, and the mounting hole passes through the first panel. The fixing portion 40 surrounds the mounting hole, that is, the fixing portion 40 is an annular structure. The fixing portion 40 includes a cantilever 41 and a roll 42, the cantilever 41 is provided on the side wall of the mounting hole, the roll 42 is provided on the side of the cantilever 41 away from the battery cell 30, and the roll 42 is bent into a connecting section 421 and a pressing section 422, a spacer is formed between the pressing section 422 and the cantilever 41, and the pole assembly 20 is at least partially located in the spacer, the length of the roll 42 is L1, the length of the cantilever 41 is L2, 0.1≤L1 / L2≤10.

[0033] The cantilever 41 is arranged on the side wall of the mounting hole, and the cantilever 41 extends toward the center of the mounting hole. The length of the cantilever 41 is the distance from one end of the cantilever 41 away from the side wall of the mounting hole to one end of the cantilever 41 close to the side wall of the mounting hole. The length of the piping 42 is the sum of the length L11 of the connecting section 421 and the length L12 of the pressing section 422. The length of the connecting section 421 is the distance from one end of the connecting section 421 close to the cantilever 41 to one end of the connecting section 421 away from the cantilever 41, and the length of the pressing section 422 is the distance from one end of the pressing section 422 close to the connecting section 421 to one end of the pressing section 422 away from the connecting section 421.

[0034] For example, the cantilever 41 is arranged in parallel with the first panel, the connecting section 421 is perpendicular to the first panel, and the pressing section 422 is arranged in parallel with the cantilever 41. The mounting hole is a circular hole on the first panel, and the cantilever 41, the connecting section 421 and the pressing section 422 are all circular ring structures. The length L2 of the cantilever 41 is the dimension of the cantilever 41 along the circular ring diameter direction (the difference between the outer ring radius of the cantilever 41 and the inner ring radius of the cantilever 41), the length of the connecting section 421 is the dimension of the connecting section 421 in the direction perpendicular to the cover plate 12, and the length of the pressing section 422 is the dimension of the pressing section 422 along the circular ring diameter direction (the difference between the outer ring radius of the pressing section 422 and the inner ring radius of the pressing section 422).

[0035] The length of the roll edge 42 is L1, L1=L11+L12, the length of the cantilever 41 is L2, 0.1≤L1 / L2≤10. For example, the ratio of L1 to L2 is 0.1, 0.2, 0.3, 0.8, 1, 2, 5, 7, 8 or 10. Further, 0.3≤L1 / L2≤6. On the one hand, the ratio of L1 to L2 is greater than or equal to 0.1, which avoids the problem of weakening the strength of the cantilever 41 due to the cantilever 41 being too long. On the other hand, the ratio of L1 to L2 is less than or equal to 10, which avoids the problem of a large amount of metal chips generated during the processing due to the roll edge 42 being too long, thereby affecting the electrical connection performance of the battery 100.

[0036] In one embodiment of the present disclosure, the thickness of the piping 42 is a, 1≤a / L1≤8. For example, the ratio of the thickness of the piping 42 to the length of the piping 42 is 1, 2, 3, 4, 5, 6, 7 or 8. This avoids the problem that the strength of the piping 42 cannot meet the use requirements due to the small thickness of the piping 42 or the excessive length of the piping 42. Furthermore, 2≤a / L1≤6.

[0037] The length L1 of the roll edge 42 ranges from 1mm to 10mm. For example, the length L1 of the roll edge 42 is 1mm, 2mm, 3mm, 5mm, 8mm or 10mm. On the one hand, the length of the roll edge 42 is greater than or equal to 1mm, which solves the problem that the roll edge 42 cannot be too short, resulting in a thinner portion of the crimped portion of the pole 21, which is easily crushed during the rolling process; on the other hand, the length of the roll edge 42 is less than or equal to 10mm, which solves the problem that the roll edge 42 is too high and affects the strength of the roll edge 42. Further, the length L1 of the roll edge 42 ranges from 1.5mm to 6mm.

[0038] The thickness a of the rolled edge 42 is in the range of 0.3mm-2mm. The thickness of the rolled edge 42 is the thickness of the connecting section 421 and / or the pressing section 422. The thickness of the connecting section 421 is the distance from the side of the connecting section 421 away from the center of the mounting hole to the side of the connecting section 421 close to the center of the mounting hole. The thickness of the pressing section 422 is the distance from the side of the pressing section 422 close to the battery cell 30 to the side of the pressing section 422 away from the battery cell 30. For example, the thickness of the rolled edge 42 is 0.3mm, 0.4mm, 0.5mm, 0.8mm, 1mm, 1.2mm, 1.5mm, 1.8mm or 2mm. Further, the thickness a of the rolled edge 42 is in the range of 0.5mm-1.5mm.

[0039] The length of the connecting section 421 is L11, the length of the pressing section 422 is L12, and 0.3≤L11 / L12≤3. For example, the ratio of the length of the connecting section 421 to the length of the pressing section 422 is 0.3, 0.4, 0.5, 0.6, 0.7, 1, 1.5, 2, 2.3, 2.8 or 3. Under the condition that the use requirements are met (the pole assembly 20 is not easy to fall out), the longer the connecting section 421 is, the less long the pressing section 422 should be. If the pressing section 422 is too long, the structural strength of the material itself is not enough to support the constraint on the pole assembly 20; the shorter the connecting section 421 is, the longer the crimping section can be, and the larger the overlapping surface with the pole assembly 20 is, and the less likely it is to fall out.

[0040] The battery cell 30 includes a battery cell body and a tab, and the tab is provided at the end of the battery cell body. For example, tabs can be provided at both ends of the battery cell body along the length direction. A first tab is provided at one end of the battery cell body, and a second tab is provided at the other end of the battery cell body. One of the first tab and the second tab is a positive tab, and the other of the first tab and the second tab is a negative tab.

[0041] It should be noted that the battery body includes more than two pole pieces, and the pole ear includes more than two single-piece pole ears, which extend from the corresponding pole pieces respectively, and the width of the single-piece pole ear is smaller than the width of the pole piece. Multiple single-piece pole ears are stacked to form a pole ear, and connected to the pole column 21, wherein the pole ear can be welded to the pole column 21. The single-piece pole ear is made of metal foil with good electrical and thermal conductivity, such as aluminum, copper or nickel.

[0042] In the disclosed embodiment, the battery cell 30 may be a wound battery cell or a laminated battery cell. When the battery cell 30 is a laminated battery cell, the battery cell 30 has a first electrode sheet stacked on top of each other, a second electrode sheet with electrical properties opposite to the first electrode sheet, and a diaphragm sheet disposed between the first electrode sheet and the second electrode sheet, so that multiple pairs of first electrode sheets and second electrode sheets are stacked to form a laminated battery cell. When the battery cell 30 is a wound battery cell, the first electrode sheet, the second electrode sheet with electrical properties opposite to the first electrode sheet, and the diaphragm sheet disposed between the first electrode sheet and the second electrode sheet are wound to obtain a wound battery cell.

[0043] The pole assembly 20 includes a pole 21 and an insulating member 22, wherein the insulating member 22 is disposed between the pole 21 and the housing 10, and the insulating member 22 is at least partially located in the spacer. That is, the insulating member 22 is clamped between the cantilever 41 and the pressing section 422. By fixing the insulating member 22 between the cantilever 41 and the pressing section 422, the connection stability between the pole assembly 20 and the housing 10 is improved.

[0044] The insulating member 22 is annular, and the pole 21 is inserted through the insulating member 22. A groove is provided on the inner wall of the insulating member 22, and a protrusion is provided on the surface of the pole 21. The protrusion on the surface of the pole 21 is clamped in the groove on the inner wall of the insulating member 22, so that the insulating member 22 and the pole 21 are clamped, that is, the positioning of the pole 21 and the housing 10 is achieved, and the pole 21 is prevented from falling off due to vibration or collision.

[0045] In one embodiment, the battery 100 also includes an insulating top cover 50, which is arranged on the outer surface of the shell 10 and covers the pressing section 422, the insulating member 22 and the pole 21 at the same time, so that the insulating top cover can form an insulating protection for the shell 10 to prevent the shell 10 from forming an electrical connection with other structures, and the insulating top cover can also increase the insulation capacity between the pressing section 422 and the pole 21.

[0046] In one embodiment, the housing 10 and the fixing portion 40 are integrally formed, which can not only improve the manufacturing efficiency of the battery 100, but also ensure the structural strength of the housing 10 and the fixing portion 40. The housing 10 and the fixing portion 40 can be formed by extrusion.

[0047] For example, in the embodiment of the present disclosure, two pole assemblies 20 are provided on the first panel of the housing 10, one of which is a positive pole assembly and the other is a negative pole assembly. On this basis, two mounting holes may be provided on the first panel, and the two mounting holes are arranged along the length direction of the first panel. The positive pole assembly is connected to the positive pole lug of the battery cell 30 (directly connected or connected through an adapter), and the negative pole assembly is connected to the negative pole lug of the battery cell 30 (directly connected or connected through an adapter).

[0048] The battery 100 provided in the embodiment of the present disclosure includes a shell 10, a battery cell 30 and a pole assembly 20. The shell 10 has a accommodating space, the battery cell 30 is arranged in the accommodating space, the pole assembly 20 passes through a mounting hole on a first panel of the shell 10, and a fixing portion 40 is provided on the first panel. The fixing portion 40 surrounds the mounting hole, the fixing portion 40 includes a cantilever 41 and a rolled edge 42, the cantilever 41 is arranged on a side wall of the mounting hole, the rolled edge 42 is arranged on a side of the cantilever 41 away from the battery cell 30, and the rolled edge 42 is bent into a connecting section 421 and a pressing section 422, a spacer is formed between the pressing section 422 and the cantilever 41, and the pole assembly 20 is at least partially located in the spacer, that is, the pole assembly 20 is at least partially sandwiched between the cantilever 41 and the pressing section 422, thereby improving the connection stability between the pole assembly 20 and the shell 10, thereby improving the service life of the battery 100. Furthermore, the ratio of the length L1 of the roll edge 42 to the length L2 of the cantilever 41 is in the range of 0.1-10. On the one hand, it avoids the problem of a large amount of metal chips generated during the processing due to the excessive length of the roll edge 42, which affects the electrical connection performance of the battery 100. On the other hand, it avoids the problem of weakened strength of the cantilever 41 due to the excessive length of the cantilever 41.

[0049] The exemplary embodiments of the present disclosure also provide a battery device, such as Figure 4 As shown, the battery device includes a battery 100. The battery includes a shell 10, a battery cell 30 and a pole assembly 20. The shell 10 has an accommodating space. The first panel of the shell 10 is provided with a mounting hole. The battery cell 30 is arranged in the accommodating space. The pole assembly 20 is inserted into the mounting hole, and the pole assembly 20 and the battery cell 30 are connected. Among them, a fixing portion 40 is provided on the first panel, and the fixing portion 40 surrounds the mounting hole. The fixing portion 40 includes a cantilever 41 and a rolled edge 42. The cantilever 41 is arranged on the side wall of the mounting hole. The rolled edge 42 is arranged on the side of the cantilever 41 away from the battery cell 30, and the rolled edge 42 is bent into a connecting section 421 and a pressing section 422. A spacer is formed between the pressing section 422 and the cantilever 41. The pole assembly 20 is at least partially located in the spacer. The length of the rolled edge 42 is L1, and the length of the cantilever 41 is L2. 0.1≤L1 / L2≤10.

[0050] Furthermore, the battery device provided in the embodiment of the present disclosure may also include a box body 200, the box body 200 includes a bottom plate 210 and a structural beam 220, the structural beam 220 is connected to the bottom plate 210, forming one or more battery compartments, and the battery 100 is arranged in the battery compartment. The bottom plate 210 is used to support the battery 100, and the structural beam 220 is used to limit the battery 100.

[0051] A plurality of stacked batteries 100 may be arranged in the battery compartment. When the plurality of batteries 100 are stacked, the large surfaces (first side plates) of adjacent batteries 100 face each other, and the small surfaces (end plates) of the batteries 100 along the length direction face the bottom plate 210. The plurality of batteries 100 in the battery compartment may be electrically connected (in series or in parallel) via a busbar.

[0052] The battery device provided in the embodiment of the present disclosure includes a battery 100, in which a housing 10 has an accommodating space, a battery cell 30 is arranged in the accommodating space, a pole assembly 20 is passed through a mounting hole on a first panel of the housing 10, a fixing portion 40 is provided on the first panel, the fixing portion 40 surrounds the mounting hole, the fixing portion 40 includes a cantilever 41 and a rolled edge 42, the cantilever 41 is provided on a side wall of the mounting hole, the rolled edge 42 is provided on a side of the cantilever 41 away from the battery cell 30, and the rolled edge 42 is bent into a connecting section 421 and a pressing section 422, a spacer is formed between the pressing section 422 and the cantilever 41, and the pole assembly 20 is at least partially located in the spacer, that is, the pole assembly 20 is at least partially clamped between the cantilever 41 and the pressing section 422, thereby improving the connection stability between the pole assembly 20 and the housing 10, thereby improving the service life of the battery 100. Furthermore, the ratio of the length L1 of the roll edge 42 to the length L2 of the cantilever 41 is in the range of 0.1-10. On the one hand, it avoids the problem of a large amount of metal chips generated during the processing due to the excessive length of the roll edge 42, which affects the electrical connection performance of the battery 100. On the other hand, it avoids the problem of weakened strength of the cantilever 41 due to the excessive length of the cantilever 41.

[0053] The battery device provided in the embodiments of the present disclosure may be applied to electric vehicles. When the battery device is used in an electric vehicle, the battery device may be a battery pack, which is installed on the electric vehicle to provide energy to the electric vehicle.

[0054] In practical applications, the battery pack can be installed on the frame of the electric vehicle. The battery pack can be fixedly connected to the frame. Or the battery pack can be a modular battery pack that can be detachably connected to the vehicle body for easy replacement.

[0055] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A battery, characterized in that: The battery comprises: A housing, wherein the housing has a containing space, and a mounting hole is provided on a first panel of the housing; A battery cell, wherein the battery cell is arranged in the accommodating space; A pole assembly, wherein the pole assembly is inserted into the mounting hole and connected to the battery cell; Among them, a fixing portion is provided on the first panel, and the fixing portion surrounds the mounting hole. The fixing portion includes a cantilever and a rolled edge. The cantilever is provided on the side wall of the mounting hole, and the rolled edge is provided on the side of the cantilever away from the battery core, and the rolled edge is bent into a connecting section and a pressing section, and a spacer is formed between the pressing section and the cantilever, and the pole assembly is at least partially located in the spacer. The length of the rolled edge is L1, and the length of the cantilever is L2, 0.1≤L1 / L2≤10.

2. The battery according to claim 1, characterized in that 0.3≤L1 / L2≤6.

3. The battery according to claim 1, characterized in that The thickness of the piping is a, 1≤a / L1≤8.

4. The battery according to claim 3, characterized in that 2≤a / L1≤6.

5. The battery according to claim 3, characterized in that The length L1 of the rolling edge ranges from 1 mm to 10 mm.

6. The battery according to claim 5, characterized in that The length L1 of the rolling edge ranges from 1.5 mm to 6 mm.

7. The battery according to claim 3, characterized in that The thickness a of the piping is in the range of 0.3 mm to 2 mm.

8. The battery according to claim 7, characterized in that The thickness a of the piping is in the range of 0.5 mm to 1.5 mm.

9. The battery according to claim 1, characterized in that The length of the connecting section is L11, the length of the pressing section is L12, and 0.3≤L11 / L12≤3.

10. The battery according to claim 1, characterized in that The pole assembly comprises: Pole; An insulating member is provided between the pole and the housing, and at least a part of the insulating member is located in the spacer.

11. A battery device, characterized in that: The battery device comprises the battery according to any one of claims 1-10.

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