Battery

Abstract

The battery comprises a shell, a pole group, a pole column and a current collecting disc, the pole group is arranged in the shell, the pole column is arranged in the shell, a first groove and a second groove are formed in the two opposite sides of the pole column in the thickness direction respectively, and the first groove and the second groove are opposite and arranged at an interval; the current collecting disc is arranged between the pole and the pole group and is electrically connected with the pole group, a connecting bulge is formed on one side, deviating from the pole group, of the current collecting disc, and at least part of the connecting bulge is positioned in the first groove and is connected with the inner wall of the first groove. According to the battery disclosed by the embodiment of the utility model, the second groove is convenient for visual positioning in a laser welding process and is beneficial for improving the welding precision and efficiency of the collector plate and the pole, and meanwhile, the second groove can be used for accommodating a welding spot generated in a welding process, so that the flatness of the side surface, deviating from the pole group, of the pole can be better ensured; therefore, the pole can be better attached and connected with the structures such as the busbar, and the reliability and the stability of the connection between the pole and the structures such as the busbar can be improved.

Description

Technical Field

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

[0002] With the rapid development of the battery industry, it is widely used in electronic equipment, vehicles and other industries due to its high environmental protection and low cost. During the assembly process of cylindrical batteries, the collector plate needs to be welded to the pole, but the pole and the shell are usually pre-assembled into a shell assembly, which makes it difficult to position the collector plate during welding and assembly with the pole. At the same time, the welds generated during the welding process accumulate on the pole, which directly affects the flatness of the outer side of the pole, resulting in the pole and the busbar being difficult to fit together when welded, affecting the connection strength. Utility Model Content

[0003] The utility model provides a battery, which can better ensure the flatness of the side of the pole away from the pole group, so as to ensure that the pole can be better fitted and connected with structures such as a bus bar, which is beneficial to improving the reliability and stability of the connection between the pole and the bus bar and other structures.

[0004] According to the battery of the embodiment of the utility model, it includes: a shell; a pole group, which is arranged in the shell; a pole column, which is arranged in the shell, and a first groove and a second groove are respectively formed on opposite sides of the pole column in the thickness direction, and the first groove and the second groove are opposite to each other and arranged at intervals; a current collecting plate, which is arranged between the pole column and the pole group and is electrically connected to the pole group, and a connecting protrusion is formed on the side of the current collecting plate away from the pole group, and at least a part of the connecting protrusion is located in the first groove and connected to the inner wall of the first groove.

[0005] According to the battery of the embodiment of the utility model, the second groove facilitates visual positioning in the laser welding process, which is beneficial to improving the welding accuracy and efficiency of the current collecting plate and the pole. At the same time, the second groove can accommodate the weld spots generated in the welding process, thereby preventing the weld spots generated in the welding process of the current collecting plate and the pole from protruding from the side of the pole away from the pole group, that is, the outer side, which can better ensure the flatness of the side of the pole away from the pole group, so as to ensure that the pole can be better fitted and connected with structures such as bus bars, which is beneficial to improving the reliability and stability of the connection between the pole and structures such as bus bars.

[0006] According to some embodiments of the present invention, the side of the connecting protrusion facing away from the pole group is connected to the bottom wall of the first groove, and the outer peripheral wall of the connecting protrusion is spaced apart from the inner peripheral wall of the first groove.

[0007] According to some embodiments of the present invention, the current collecting disk includes a disk body and the connecting protrusion, the connecting protrusion is arranged on a side of the disk body away from the pole group, and the disk body is spaced apart from or abutted against the pole.

[0008] According to some embodiments of the present invention, the interval H1 between the first groove and the second groove in the thickness direction of the pole satisfies: 0.2≤H1≤1.5mm; and / or the thickness H2 of the connecting protrusion and the interval H1 between the first groove and the second groove in the thickness direction of the pole satisfies: 0.8≤H1 / H2≤5.

[0009] According to some embodiments of the present invention, the inner circumferential wall of the first groove transitions to the side of the pole facing the collecting plate along an arc surface, and the radius R0 of the arc where the arc surface is located satisfies: 0.1≤R0≤1.5mm; and / or the depth H3 of the second groove satisfies: 0.1≤H3≤0.5mm.

[0010] According to some embodiments of the present invention, the inner diameter D1 of the first groove satisfies: 3≤D1≤9mm; and / or the inner diameter D2 of the second groove satisfies: 2≤D2≤8mm.

[0011] According to some embodiments of the utility model, the pole includes a first limiting portion, a second limiting portion and a connecting portion, the first groove and the second groove are both formed on the connecting portion, an assembly hole is formed on the shell, the connecting portion is passed through the assembly hole, the first limiting portion and the second limiting portion are arranged on the outer peripheral wall of the connecting portion and are spaced apart along the thickness direction of the pole, the first limiting portion is located on the outside of the shell, and the second limiting portion is located on the inside of the shell, and the first limiting portion, the second limiting portion and the connecting portion jointly define a limiting space that clamps the outer peripheral edge of the assembly hole.

[0012] According to some embodiments of the present invention, the thickness H4 of the first limiting portion satisfies: 0.6≤H4≤2.5 mm; the thickness H5 of the second limiting portion satisfies: 0.6≤H5≤2.5 mm.

[0013] According to some embodiments of the present invention, the depth H6 of the first groove and the thickness H5 of the second limiting portion satisfy: 0.1≤H5 / H6≤3.

[0014] According to some embodiments of the present invention, the outer diameter D3 of the first limiting portion satisfies: 10≤D3≤30mm; and / or, the outer diameter D4 of the second limiting portion satisfies: 6≤D4≤15mm; and / or, the outer diameter D5 of the connecting portion satisfies: 4.5≤D5≤10.5mm.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a battery according to an embodiment of the utility model;

[0017] Figure 2 yes Figure 1 A top view of the middle battery;

[0018] Figure 3 yes Figure 2 Sectional view along AA;

[0019] Figure 4 yes Figure 3 Enlarged view of area B;

[0020] Figure 5 is a schematic diagram of a battery pole according to an embodiment of the utility model;

[0021] Figure 6 yes Figure 5 Top view of the middle pole;

[0022] Figure 7 yes Figure 6 Cross-sectional view along CC;

[0023] Figure 8 is a schematic diagram of a current collecting plate of a battery according to an embodiment of the utility model;

[0024] Fig. 9 yes Figure 8 Top view of the middle collecting plate;

[0025] Fig.10 yes Fig. 9 Sectional view along DD;

[0026] Fig.11 It is a cross-sectional view of a current collecting plate of a battery according to another embodiment of the utility model.

[0027] Reference numerals:

[0028] Battery 100;

[0029] Shell 1;

[0030] Pole group 2;

[0031] Pole 3; first groove 31; second groove 32; first limiting portion 33; second limiting portion 34; connecting portion 35; limiting space 36; welding rib 37;

[0032] Collecting plate 4; connecting protrusion 41; plate body 42; weight-reducing groove 43;

[0033] Insulation sealing assembly 5. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0035] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the applicability of other processes and / or the use of other materials.

[0036] A battery 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0037] like Figure 1-Figure 11 As shown, the battery 100 according to the embodiment of the utility model comprises: a housing 1, an electrode group 2, a pole 3 and a current collecting plate 4, the pole group 2 is arranged in the housing 1, the pole 3 is arranged in the housing 1, the pole 3 is formed with a first groove 31 and a second groove 32 on opposite sides of the pole 3 in the thickness direction, the first groove 31 and the second groove 32 are opposite and spaced, the current collecting plate 4 is arranged between the pole 3 and the pole group 2 and is electrically connected to the pole group 2, and a connecting protrusion 41 is formed on the side of the current collecting plate 4 away from the pole group 2, at least part of the connecting protrusion 41 is located in the first groove 31 and connected to the inner wall of the first groove 31. Among them, a part of the connecting protrusion 41 may be located in the first groove 31, or the connecting protrusion 41 may be completely located in the first groove 31, and no specific limitation is made here.

[0038] That is, the pole 3 and the pole group 2 are respectively located on opposite sides of the current collecting plate 4, and a first groove 31 is formed on the side of the pole 3 facing the pole group 2, that is, facing the inside of the shell 1, and a second groove 32 is formed on the side of the pole 3 away from the pole group 2, that is, on the outer side of the pole 3, which is opposite to and spaced from the first groove 31, that is, the first groove 31 and the second groove 32 are arranged along the thickness of the pole 3 and are not connected. Therefore, during the assembly process of the current collecting plate 4 and the pole 3, after the connecting protrusion 41 is inserted into the first groove 31, a welding tool such as a laser welding device can be aligned with the second groove 32 on the outer side of the pole 3 to connect. The protrusion 41 is connected to the first groove 31, and the laser is emitted to achieve welding and fixing of the connection protrusion 41 and the inner wall of the first groove 31 to achieve electrical connection, that is, the current collecting plate 4 and the pole 3 are connected by the matching of the connection protrusion 41 and the mounting hole to achieve electrical connection, so that the pole group 2 can be electrically connected to the pole 3 through the current collecting plate 4, that is, a connected current path is formed between the pole group 2 and the pole 3, so that the electricity stored in the pole group 2 can be released outward through the pole 3, and the charging structure can transport the electricity to the pole group 2 through the pole 3 for storage to realize the charging and discharging behavior of the battery 100.

[0039] Thus, the second groove 32 facilitates visual positioning in the laser welding process, which is beneficial to improving the welding accuracy and efficiency of the collector plate 4 and the pole 3. At the same time, the second groove 32 can accommodate the welds generated during the welding process, thereby preventing the welds generated during the welding process of the collector plate 4 and the pole 3 from protruding from the side of the pole 3 away from the pole group 2, that is, the outer side, which can better ensure the flatness of the side of the pole 3 away from the pole group 2, so as to ensure that the pole 3 can better fit and connect with the busbar and other structures, which is beneficial to improving the reliability and stability of the connection between the pole 3 and the busbar and other structures. In addition, by connecting the protrusion 41 with the first groove 31, the plug-in positioning of the collector plate 4 and the pole 3 can be achieved, which is beneficial to improving the positioning accuracy of the collector plate 4 and the pole 3 to improve the welding quality.

[0040] According to the battery 100 of the embodiment of the utility model, the second groove 32 facilitates visual positioning in the laser welding process, which is beneficial to improving the welding accuracy and efficiency of the current collecting plate 4 and the pole 3. At the same time, the second groove 32 can accommodate the weld spots generated during the welding process, thereby preventing the weld spots generated during the welding process of the current collecting plate 4 and the pole 3 from protruding from the side of the pole 3 away from the pole group 2, that is, the outer side, and can better ensure the flatness of the side of the pole 3 away from the pole group 2, so as to ensure that the pole 3 can be better fitted and connected with the bus bar and other structures, which is beneficial to improving the reliability and stability of the connection between the pole 3 and the bus bar and other structures.

[0041] In a specific example, the battery 100 is a cylindrical battery 100, the electrode group 2, the current collecting plate 4 and the pole 3 are arranged in sequence along the thickness direction of the pole 3, the pole ear of the electrode group 2 is welded on the axial side of the current collecting plate 4 away from the pole 3, and the first groove 31 and the second groove 32 are coaxially arranged.

[0042] In a specific example, the connecting protrusion 41 forms a weight-reducing groove 43 opening toward the pole group 2 , and the opening of the weight-reducing groove 43 extends to the side of the current collecting plate 4 facing the pole group 2 .

[0043] According to some embodiments of the present invention, the side of the connecting protrusion 41 facing away from the pole group 2 is connected to the bottom wall of the first groove 31, and the outer peripheral wall of the connecting protrusion 41 is spaced apart from the inner peripheral wall of the first groove 31. The bottom wall of the first groove 31 here refers to the inner wall of the first groove 31 facing the pole group 2 in the thickness direction of the pole column. That is to say, the connecting protrusion 41 is connected to the pole 3 only through the side opposite to the bottom wall of the first groove 31, wherein it can be understood that the side of the connecting protrusion 41 facing the bottom of the first groove 31 is opposite to the second groove 32 and the distance between the connecting protrusion 41 and the second groove 32 is short, thereby the difficulty of welding the connecting protrusion 41 and the pole 3 can be reduced. In addition, after the connecting protrusion 41 is inserted into the first groove 31, it has a certain movable range in the radial direction of the first groove 31, that is, the diameter of the connecting protrusion 41 is smaller than the diameter of the first groove 31. Therefore, when there is a certain installation position deviation between the pole group 2 and the current collecting disk 4 in the radial direction of the first groove 31, the gap between the outer peripheral wall of the connecting protrusion 41 and the inner peripheral wall of the first groove 31 can better adapt to the position deviation of the current collecting disk 4, thereby preventing the pole 3 from tearing the connection position of the current collecting disk 4 and the pole group 2 when limiting the connecting protrusion 41, which is beneficial to improving the stability and safety performance of the battery 100.

[0044] In a specific example, the inner diameter of the second groove 32 is smaller than the inner diameter of the first groove 31, thereby ensuring that the laser emitted downwardly aligned with the second groove 32 can accurately weld the area where the bottom wall of the first groove 31 contacts the connecting protrusion 41, which is beneficial to improving welding accuracy.

[0045] In other embodiments, the dimensional relationship between the connecting protrusion 41 and the first groove 31 and the second groove 32 satisfies: the diameter of the connecting protrusion 41 is less than or equal to the diameter of the second groove 32, and the diameter of the second groove 32 is less than or equal to the diameter of the first groove 31, and no specific limitation is made here.

[0046] According to some embodiments of the utility model, the current collecting disk 4 includes a disk body 42 and a connecting protrusion 41, the connecting protrusion 41 is arranged on the side of the disk body 42 away from the pole group 2, and the disk body 42 is spaced or abutted against the pole 3. That is to say, after the side of the connecting protrusion 41 facing the bottom wall of the first groove 31 contacts the bottom wall of the first groove 31, there is still a certain distance between the disk body 42 and the pole 3 in the thickness direction of the pole 3, thereby ensuring that the side of the connecting protrusion 41 away from the pole group 2 can fully abut against the bottom wall of the first groove 31, which is conducive to improving the welding strength between the connecting protrusion 41 and the pole 3; or, the sides of the disk body 42 and the pole 3 facing each other abut against each other, so that the installation space occupied by the disk body 42 and the pole 3 in the thickness direction of the pole 3 can be well reduced, thereby facilitating the control of the overall size of the battery 100.

[0047] According to some embodiments of the utility model, the interval H1 between the first groove 31 and the second groove 32 in the thickness direction of the pole 3 satisfies: 0.2≤H1≤1.5mm. Among them, the interval between the first groove 31 and the second groove 32 in the thickness direction of the pole 3 refers to the thickness of the portion of the pole 3 located between the bottom wall of the first groove 31 and the bottom wall of the second groove 32. For the convenience of description, this part of the structure is defined as the welding rib 37 and introduced into the following description. That is, the thickness of the welding rib 37 is controlled within the range of 0.2mm to 1.5mm. For example, the thickness of the welding rib 37 can be 0.2mm, or 0.3mm, or 0.5mm, 0.7mm, or 1mm, or 1.2mm, or 1.5mm, etc., and no specific restrictions are made here. It can be understood that the thicker the welding rib 37 is, the higher the strength of the welding rib 37 is, the less likely it is to produce explosive points and pores, etc., and at the same time, the more space in the thickness direction is occupied in the pole 3. Therefore, by controlling the thickness of the welding rib 37 within the range of 0.2 mm to 1.5 mm, it is possible to avoid defects such as explosion points and pores caused by the welding rib 37 being too thin and affecting the welding strength. At the same time, it is possible to avoid the welding rib 37 being too thick and occupying too much thickness space and affecting the depth of the first groove 31 and the second groove 32. This can ensure the welding strength between the collecting plate 4 and the pole 3 while reserving a larger setting space for the first groove 31 and the second groove 32.

[0048] According to some embodiments of the present invention, the thickness H2 of the connection protrusion 41 and the interval H1 between the first groove 31 and the second groove 32 in the thickness direction of the pole 3 satisfy: 0.8≤H1 / H2≤5. That is, the thickness ratio of the connection protrusion 41 to the welding rib 37 is controlled within the range of 0.8 to 5. For example, the thickness ratio of the connection protrusion 41 to the welding rib 37 can be 0.8, or 0.9, or 1.1, or 1.7, or 2.6, or 3.4, or 5, etc., and no specific limitation is made here. The greater the thickness ratio of the connection protrusion 41 to the welding rib 37, the greater the thickness difference between the connection protrusion 41 and the welding rib 37. For example, when the thickness of the connection protrusion 41 is fixed, the greater the thickness difference between the connection protrusion 41 and the welding rib 37, the thinner the thickness of the welding rib 37. For example, when the thickness of the welding rib 37 is fixed, the greater the thickness difference between the connection protrusion 41 and the welding rib 37, the greater the thickness of the connection protrusion 41. On the contrary, the smaller the thickness ratio of the connection protrusion 41 to the welding rib 37, the smaller the thickness difference between the connection protrusion 41 and the welding. Therefore, by controlling the thickness ratio of the connection protrusion 41 to the welding rib 37 within the range of 0.8 to 5, it is possible to avoid the thickness difference between the connection protrusion 41 and the welding rib 37 being too large or too small to affect the overall height size of the battery 100 or the welding strength of the current collecting plate 4 and the pole 3.

[0049] In some embodiments, the interval H1 between the first groove 31 and the second groove 32 in the thickness direction of the pole 3 satisfies: 0.2≤H1≤1.5mm, and the thickness H2 of the connecting protrusion 41 and the interval H1 between the first groove 31 and the second groove 32 in the thickness direction of the pole 3 satisfies: 0.8≤H1 / H2≤5. Thus, a larger setting space can be reserved for the first groove 31 and the second groove 32 while ensuring the welding strength between the collector plate 4 and the pole 3, and it is beneficial to control the height size of the battery 100.

[0050] According to some embodiments of the utility model, the inner circumferential wall of the first groove 31 transitions with the side of the pole 3 facing the collecting plate 4 along an arc surface, and the radius R0 of the arc where the arc surface is located satisfies: 0.1≤R0≤1.5mm. That is, the radius of the arc where the arc surface is located is controlled within the range of 0.1mm to 1.5mm. For example, the radius of the arc where the arc surface is located can be 0.1mm, or 0.2mm, or 0.4mm, or 0.6mm, or 0.9mm, or 1.1mm, or 1.5mm, etc., and no specific restrictions are made here. Among them, the larger the radius of the arc where the arc surface is located, the larger the curvature of the arc surface. Therefore, by controlling the radius of the arc where the arc surface is located within the range of 0.1mm to 1.5mm, it is possible to avoid fatigue damage to the pole 3 due to excessive curvature at the corner position, which is beneficial to ensuring the reliability of the pole 3.

[0051] According to some embodiments of the present invention, the depth H3 of the second groove 32 satisfies: 0.1≤H3≤0.5mm. That is, the depth of the second groove 32 in the thickness direction of the pole 3 is controlled within the range of 0.1mm to 0.5mm. For example, the depth of the second groove 32 can be 0.1mm, or 0.15mm, or 0.2mm, or 0.32mm, or 0.45mm, or 0.5mm, etc., and no specific restrictions are made here. Among them, the deeper the depth of the second groove 32, the more welding points generated during the welding process can be accommodated by the second groove 32, and the greater the depth of the opening on the outer surface of the pole 3. Therefore, by controlling the depth of the second groove 32 in the thickness direction of the pole 3 within the range of 0.1mm to 0.5mm, it is possible to avoid the depth of the second groove 32 being too small to cause the welding point to protrude from the second groove 32, and at the same time, it is possible to avoid the depth of the second groove 32 being too large to affect the structural strength of the pole 3, so that the structural strength of the pole 3 can be ensured while ensuring that the second groove 32 accommodates the welding point.

[0052] In some embodiments, the inner wall of the first groove 31 transitions to the side of the pole 3 facing the collector plate 4 along an arc surface, the radius R0 of the arc where the arc surface is located satisfies: 0.1≤R0≤1.5mm, and the depth H3 of the second groove 32 satisfies: 0.1≤H3≤0.5mm. Thus, the structural strength of the pole 3 can be ensured while ensuring that the second groove 32 accommodates the welding point, which is conducive to ensuring the reliability of the pole 3.

[0053] According to some embodiments of the present invention, the inner diameter D1 of the first groove 31 satisfies: 3≤D1≤9mm. That is, the inner diameter of the first groove 31 is controlled within the range of 3mm to 9mm. For example, the inner diameter of the first groove 31 can be 3mm, or 3.5mm, or 4mm, or 5.5mm, or 7.8mm, or 9mm, etc., and no specific restrictions are made here. Among them, the larger the inner diameter of the first groove 31, the larger the area between the connecting protrusion 41 and the first groove 31 that can be used for welding, the larger the radial size of the pole 3, and the larger the size of the assembly hole on the shell 1 that can be inserted into the pole 3. Therefore, by controlling the inner diameter of the first groove 31 within the range of 3mm to 9mm, it is possible to avoid the inner diameter of the first groove 31 being too small, resulting in a reduction in the connection area between the connecting protrusion 41 and the first groove 31, which affects the welding strength between the collector 4 and the pole 3, and at the same time, it is possible to avoid the inner diameter of the first groove 31 being too large, resulting in an increase in the radial size of the battery 100, so that the size of the battery 100 can be controlled while ensuring the welding strength between the collector 4 and the pole 3.

[0054] According to some embodiments of the utility model, the inner diameter D2 of the second groove 32 satisfies: 2≤D2≤8mm. That is, the inner diameter of the second groove 32 is controlled within the range of 2mm to 8mm. For example, the inner diameter of the second groove 32 can be 2mm, or 2.5mm, or 3mm, or 4.5mm, or 6.8mm, or 8mm, etc., and no specific restrictions are made here. Among them, the larger the inner diameter of the second groove 32, the more welding points the second groove 32 can accommodate, and the smaller the area on the outer side of the pole 3 excluding the second groove 32. Thus, it can be avoided that the inner diameter of the second groove 32 is too small, resulting in the capacity of the second groove 32 being too small, affecting the flatness of the outer side of the pole 3, and at the same time, it can be avoided that the inner diameter of the second groove 32 is too large, resulting in the outer side of the pole 3 excluding the opening area. The area is too small, which affects the welding area between the pole 3 and the bus bar, which is conducive to improving the connection stability of the pole 3 and the bus bar and other structures.

[0055] In some embodiments, the inner diameter D1 of the first groove 31 satisfies: 3≤D1≤9mm, and the inner diameter D2 of the second groove 32 satisfies: 2≤D2≤8mm. Thus, the size of the battery 100 can be controlled while ensuring the welding strength between the collector plate 4 and the pole 3, and the connection stability between the pole 3 and the busbar and other structures can be improved.

[0056] According to some embodiments of the utility model, the pole 3 includes a first limiting portion 33, a second limiting portion 34 and a connecting portion 35, the first groove 31 and the second groove 32 are both formed on the connecting portion 35, an assembly hole is formed on the shell 1, the connecting portion 35 is penetrated through the assembly hole, the first limiting portion 33 and the second limiting portion 34 are arranged on the outer peripheral wall of the connecting portion 35 and are spaced apart along the thickness direction of the pole 3, the first limiting portion 33 is located on the outside of the shell 1, and the second limiting portion 34 is located on the inside of the shell 1, the first limiting portion 33, the second limiting portion 34 and the connecting portion 35 jointly define a limiting space 36 for clamping the outer peripheral edge of the assembly hole. That is to say, a limiting space 36 is jointly defined between the side surfaces opposite to the first limiting portion 33 and the second limiting portion 34 and the outer peripheral wall of the connecting portion 35, and the first limiting portion 33 and the second limiting portion 34 are respectively located on the inner and outer sides of the portion of the shell 1 located on the outer peripheral side of the assembly hole, so that the first limiting portion 33 and the second limiting portion 34 are clamped on the shell 1 from the inner and outer sides, which can better limit the freedom of movement of the pole 3 relative to the shell 1 in the thickness direction, so as to improve the stability of the connection between the pole 3 and the shell 1.

[0057] In a specific example, the battery 100 further includes an insulating sealing component 5, which is disposed between the pole 3 and the housing 1, thereby ensuring the insulation effect between the housing 1 and the pole 3 to improve the stability and safety performance of the battery 100, and at the same time filling the gap between the housing 1 and the pole 3 to improve the overall sealing performance of the battery 100. Among them, the insulating sealing component 5 may include an upper plastic plate and a sealing ring disposed between the first limiting portion 33 and the housing 1, etc., which are not specifically limited here.

[0058] In a specific example, the pole 3 is fixed to the housing 1 by riveting. Specifically, after the pole 3 is inserted into the assembly hole, the portion of the pole 3 extending into the housing 1 is deformed toward the outer peripheral side of the connecting portion 35 due to the thrust generated by riveting to generate the second limiting portion 34, that is, the second limiting portion 34 is generated by the riveting process, which is conducive to simplifying the assembly process of the pole 3 and the housing 1. Among them, the outer diameter of the first limiting portion 33 is larger than the outer diameter of the second limiting portion 34, which is conducive to reducing the difficulty of assembling the pole 3.

[0059] According to some embodiments of the present invention, the thickness H4 of the first limit portion 33 satisfies: 0.6≤H4≤2.5mm. That is, the dimension of the first limit portion 33 in the thickness direction of the pole 3 is controlled within the range of 0.6mm to 2.5mm. For example, the thickness of the first limit portion 33 can be 0.6mm, or 0.8mm, or 1.2mm, or 1.8, or 2.5mm, etc., and no specific restrictions are made here. Among them, the larger the thickness dimension of the first limit portion 33, the higher the structural strength of the first limit portion 33, the higher the connection stability between the pole 3 and the housing 1 and the busbar and other structures, and the larger the weight and thickness dimension of the pole 3. Therefore, by controlling the thickness of the first limiting portion 33 within the range of 0.6 mm to 2.5 mm, it is possible to avoid the thickness of the first limiting portion 33 being too small to affect the connection strength between the pole 3 and the shell 1 and the welding area with structures such as the bus bar, and at the same time, it is possible to avoid the thickness of the first limiting portion 33 being too large to increase the weight and thickness of the pole 3, thereby ensuring the connection strength of the pole 3 with the connection and the welding strength with structures such as the bus bar while controlling the weight and thickness of the pole 3.

[0060] According to some embodiments of the utility model, the thickness H5 of the second limiting portion 34 satisfies: 0.6≤H5≤2.5mm. That is, the size of the second limiting portion 34 in the thickness direction of the pole is controlled within the range of 0.6mm to 2.5mm. For example, the thickness of the second limiting portion 34 can be 0.6mm, or 0.8mm, or 1.2mm, or 1.8, or 2.5mm, etc., and no specific restrictions are made here. Among them, the greater the thickness of the second limiting portion 34, the higher the structural strength of the second limiting portion 34, the higher the connection stability of the pole 3 and the housing 1, and the greater the riveting difficulty. Therefore, by controlling the thickness of the second limiting portion 34 within the range of 0.6mm to 2.5mm, it is possible to avoid the thickness of the second limiting portion 34 being too small to affect the connection strength between the pole 3 and the housing 1, and at the same time, it is possible to avoid the thickness of the second limiting portion 34 being too large to increase the installation difficulty of the pole 3, so that the assembly difficulty of the pole 3 can be reduced while ensuring the connection strength between the pole 3 and the housing 1.

[0061] In some embodiments, the thickness H4 of the first limit portion 33 satisfies: 0.6≤H4≤2.5mm, and the thickness H5 of the second limit portion 34 satisfies: 0.6≤H5≤2.5mm. Thus, the weight and thickness of the pole 3 can be controlled while ensuring the connection strength between the pole 3 and the connection protrusion 41 and the welding strength with the busbar and other structures, and the difficulty of assembling the pole 3 can be reduced.

[0062] According to some embodiments of the present invention, the depth H6 of the first groove 31 and the thickness H5 of the second stopper 34 satisfy: 0.1≤H5 / H6≤3. That is, the depth of the first groove 31 in the thickness direction of the pole 3 and the dimension ratio of the second stopper 34 in the thickness direction of the pole 3 are controlled within the range of 0.1 to 3. For example, the depth of the first groove 31 and the thickness of the second stopper 34 can be 0.1, or 0.3, or 0.6, or 1, or 1.5, or 1.9, or 2.4, or 3, etc., and no specific limitation is made here. The greater the ratio of the depth of the first groove 31 to the thickness of the second limiting portion 34, the greater the difference between the depth of the first groove 31 and the thickness of the second limiting portion 34. Conversely, the smaller the ratio of the depth of the first groove 31 to the thickness of the second limiting portion 34, the smaller the difference between the depth of the first groove 31 and the thickness of the second limiting portion 34. A too large difference may result in the thickness of the second limiting portion 34 being too small or the depth of the first groove 31 being too deep. A too small difference may result in the size of the second limiting portion 34 being too large or the depth of the first groove 31 being too shallow. Therefore, by controlling the ratio of the depth of the first groove 31 to the thickness of the second limiting portion 34 within the range of 0.1 to 3, the thickness of the second limiting portion 34 and the depth of the first groove 31 can be better guaranteed, which is conducive to improving the stability of the battery 100.

[0063] According to some embodiments of the utility model, the outer diameter D3 of the first limit portion 33 satisfies: 10≤D3≤30mm. That is, the outer diameter of the first limit portion 33 is controlled within the range of 10mm to 30mm. For example, the outer diameter of the first limit portion 33 can be 10mm, or 12mm, or 15mm, or 20mm, or 23mm, or 30mm, etc., and no specific restrictions are made here. Among them, the larger the outer diameter of the first limit portion 33, the larger the area of ​​the first limit portion 33 clamping the shell 1, the larger the welding area with the busbar and other structures, and the larger the radial size of the pole 3. Thus, by controlling the outer diameter of the first limiting portion 33 within the range of 10 mm to 30 mm, it is possible to avoid the outer diameter of the first limiting portion 33 being too small to affect the connection strength between the pole 3 and the shell 1 and the welding area with structures such as the bus bar, and at the same time, it is possible to avoid the outer diameter of the first limiting portion 33 being too large to increase the radial dimension of the pole 3, thereby ensuring the connection strength between the pole 3 and the shell 1 and the welding strength with structures such as the bus bar while controlling the radial dimension of the pole 3.

[0064] According to some embodiments of the utility model, the outer diameter D4 of the second limit portion 34 satisfies: 6≤D4≤15mm. That is, the outer diameter of the second limit portion 34 is controlled within the range of 6mm to 15mm. For example, the outer diameter of the second limit portion 34 can be 6mm, or 7mm, or 8mm, or 10mm, or 13mm, or 15mm, etc., and no specific restrictions are made here. Among them, the larger the outer diameter of the second limit portion 34, the larger the area of ​​the second limit portion 34 clamping the shell 1, and the higher the difficulty of bending to produce the second limit portion 34 when the pole 3 is riveted and installed. Therefore, the outer diameter of the second limit portion 34 is controlled within the range of 6mm to 15mm, which can avoid the outer diameter of the second limit portion 34 being too small to affect the connection strength between the pole 3 and the shell 1, and at the same time, it can avoid the outer diameter of the second limit portion 34 being too large to increase the difficulty of riveting the pole 3, so that the riveting difficulty of the pole 3 can be reduced while ensuring the connection strength between the pole 3 and the shell 1.

[0065] According to some embodiments of the present invention, the outer diameter D5 of the connection part 35 satisfies: 4.5≤D5≤10.5mm. That is, the outer diameter of the connection part 35 is controlled within the range of 4.5mm to 10.5mm. For example, the outer diameter of the connection part 35 can be 4.5mm, or 5mm, or 6.5mm, or 7.5mm, or 8.7mm, or 9.8mm, or 10.5mm, etc., without specific restrictions. The larger the outer diameter of the connection part 35, the larger the space that can be reserved for the mounting hole, the larger the area of ​​the inner wall of the mounting hole, and the larger the opening size required for the assembly hole. Therefore, by controlling the outer diameter of the connecting portion 35 within the range of 4.5 mm to 10.5 mm, it is possible to avoid the outer diameter of the connecting portion 35 being too small, which would result in the opening size of the mounting hole being too small and affecting the welding area between the collecting plate 4 and the pole 3. At the same time, it is possible to avoid the outer diameter of the connecting portion 35 being too large, which would result in the size of the assembly hole being too large and affecting the structural strength of the shell 1. This ensures that the structural strength of the shell 1 is ensured while ensuring the welding area between the collecting plate 4 and the pole 3.

[0066] In some embodiments, the outer diameter D3 of the first limit portion 33 satisfies: 10≤D3≤30mm, and the outer diameter D4 of the second limit portion 34 satisfies: 6≤D4≤15mm. Thus, the radial dimension of the pole 3 can be controlled while ensuring the connection strength between the pole 3 and the housing 1 and the welding strength with the busbar and other structures, and the difficulty of riveting the pole 3 can be reduced.

[0067] In some embodiments, the outer diameter D3 of the first limit portion 33 satisfies: 10≤D3≤30 mm, and the outer diameter D5 of the connection portion 35 satisfies: 4.5≤D5≤10.5 mm. Thus, the radial dimension of the pole 3 can be controlled while ensuring the connection strength between the pole 3 and the housing 1 and the welding strength with the busbar and other structures, and the structural strength of the housing 1 can be ensured while ensuring the welding area between the collector plate 4 and the pole 3.

[0068] In some embodiments, the outer diameter D4 of the second limit portion 34 satisfies: 6≤D4≤15mm, and the outer diameter D5 of the connection portion 35 satisfies: 4.5≤D5≤10.5mm. Thus, the riveting difficulty of the pole 3 can be reduced while ensuring the connection strength between the pole 3 and the housing 1, and the structural strength of the housing 1 can be ensured while ensuring the welding area between the collector plate 4 and the pole 3.

[0069] In some embodiments, the outer diameter D3 of the first limit portion 33 satisfies: 10≤D3≤30mm, the outer diameter D4 of the second limit portion 34 satisfies: 6≤D4≤15mm, and the outer diameter D5 of the connection portion 35 satisfies: 4.5≤D5≤10.5mm. Thus, the radial dimension of the pole 3 can be controlled while ensuring the connection strength between the pole 3 and the housing 1 and the welding strength with the busbar and other structures, which is conducive to reducing the difficulty of riveting the pole 3, and the structural strength of the housing 1 can be ensured while ensuring the welding area between the collector plate 4 and the pole 3.

[0070] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0072] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery, characterized in that: include: case; A pole group, the pole group is arranged in the shell; A pole, the pole is arranged on the shell, and a first groove and a second groove are respectively formed on opposite sides of the pole in the thickness direction, and the first groove is opposite to the second groove and is arranged at an interval; A current collecting plate is arranged between the pole and the pole group and is electrically connected to the pole group. A connecting protrusion is formed on a side of the current collecting plate away from the pole group. At least a part of the connecting protrusion is located in the first groove and connected to the inner wall of the first groove.

2. The battery according to claim 1, characterized in that The side of the connecting protrusion facing away from the pole group is connected to the bottom wall of the first groove, and the outer peripheral wall of the connecting protrusion is spaced apart from the inner peripheral wall of the first groove.

3. The battery according to claim 2, characterized in that The current collecting disk comprises a disk body and the connecting protrusion, wherein the connecting protrusion is arranged on a side of the disk body away from the pole group, and the disk body is spaced apart from or abuts against the pole.

4. The battery according to claim 1, characterized in that The interval H1 between the first groove and the second groove in the thickness direction of the pole satisfies: 0.2≤H1≤1.5mm; and / or the thickness H2 of the connecting protrusion and the interval H1 between the first groove and the second groove in the thickness direction of the pole satisfies: 0.8≤H1 / H2≤5.

5. The battery according to claim 1, characterized in that The inner circumferential wall of the first groove transitions to the side of the pole facing the collecting plate along an arc surface, and the radius R0 of the arc where the arc surface is located satisfies: 0.1≤R0≤1.5mm; and / or the depth H3 of the second groove satisfies: 0.1≤H3≤0.5mm.

6. The battery according to claim 1, characterized in that An inner diameter D1 of the first groove satisfies: 3≤D1≤9mm; and / or an inner diameter D2 of the second groove satisfies: 2≤D2≤8mm.

7. The battery according to claim 1, characterized in that The pole includes a first limiting portion, a second limiting portion and a connecting portion, the first groove and the second groove are both formed on the connecting portion, an assembly hole is formed on the shell, the connecting portion is penetrated through the assembly hole, the first limiting portion and the second limiting portion are arranged on the outer peripheral wall of the connecting portion and are spaced apart along the thickness direction of the pole, the first limiting portion is located on the outer side of the shell, the second limiting portion is located on the inner side of the shell, and the first limiting portion, the second limiting portion and the connecting portion jointly define a limiting space that clamps the outer peripheral edge of the assembly hole.

8. The battery according to claim 7, characterized in that The thickness H4 of the first limiting portion satisfies: 0.6≤H4≤2.5 mm; and / or the thickness H5 of the second limiting portion satisfies: 0.6≤H5≤2.5 mm.

9. The battery according to claim 7, characterized in that The depth H6 of the first groove and the thickness H5 of the second limiting portion satisfy: 0.1≤H5 / H6≤3.

10. The battery according to claim 7, characterized in that The outer diameter D3 of the first limiting portion satisfies: 10≤D3≤30mm; and / or, the outer diameter D4 of the second limiting portion satisfies: 6≤D4≤15mm; and / or, the outer diameter D5 of the connecting portion satisfies: 4.5≤D5≤10.5mm.

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