Battery, battery module and electric equipment

Abstract

The invention discloses a battery, a battery module and electric equipment, the battery comprises a top cover main body, a pole, an insulator and a sealing ring, and the top cover main body is provided with a mounting hole; the pole comprises a substrate and a pole body part which are connected with each other, the substrate is positioned on one side of the top cover main body, and the pole body part is arranged in the mounting hole in a penetrating manner; at least part of the insulator is arranged on the other side of the top cover main body, the insulator is annularly arranged on the peripheral side of the column body part and fixes the pole column on the top cover main body, an extension part is formed on one side, facing the substrate, of the insulator, and the extension part is located between the hole wall of the mounting hole and the column body part; the sealing ring is located between the top cover body and the base plate and annularly arranged on the peripheral side of the cylinder part, and the sealing ring and the extending part are at least partially overlapped in the axial direction of the cylinder part.

Description

Batteries, battery modules and powered devices

[0001] This application claims priority to Chinese patent application No. 202420275288.2 filed on February 4, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a battery, a battery module and an electrical device. Background Art

[0003] A power battery generally includes a battery cell and a metal casing configured to accommodate the battery cell. The metal casing generally includes a shell body and a top cover that are connected to each other. The battery cell is located in the shell body, and the top cover covers the opening of the shell body. The interior of the battery needs to be sealed to prevent internal leakage of the battery, which not only ensures the service life of the battery, but also provides a guarantee for the safety of the battery. Therefore, the quality of the top cover directly affects the performance of the battery.

[0004] The top cover typically has a mounting hole through which the terminal is exposed. To improve the battery's sealing and insulation, an insulator is typically formed by injection molding between the terminal and the outer surface of the top cover. A sealing ring is then placed between the terminal and the lower surface of the top cover for sealing. The insulator abuts the sealing ring through the mounting hole. However, existing sealing rings are typically flat and fit around the periphery of the terminal, resulting in flat contact between the sealing ring and the insulator. This results in a relatively short creepage distance between the terminal and the main body of the top cover, making them unsuitable for projects requiring high voltages.

[0005] Application Contents

[0006] The main purpose of the present application is to provide a battery, aiming to increase the creepage distance between the top cover body and the pole in the battery.

[0007] To achieve the above objectives, the battery proposed in this application includes:

[0008] A top cover body, wherein the top cover body is provided with a mounting hole;

[0009] A pole, the pole comprising a base plate and a column portion connected to each other, the base plate being located on one side of the top cover body, and the column portion being inserted into the mounting hole;

[0010] an insulator, at least a portion of which is disposed on the other side of the top cover body, the insulator being disposed around the periphery of the column portion and fixing the pole to the top cover body, the insulator having an extension formed on a side facing the substrate, the extension being located between the hole wall of the mounting hole and the column portion; and

[0011] A sealing ring is located between the top cover body and the base plate and is arranged around the circumference of the column portion. The sealing ring and the extension portion are at least partially overlapped in the axial direction of the column portion.

[0012] The top cover body seals the opening of the housing. The post of the pole is positioned within the mounting hole and electrically connected to the interior via the base plate. A sealing ring is positioned around the post and between the top cover body and the base plate, thereby sealing the interior of the housing and preventing liquid leakage. The insulator is formed by injection molding. By at least partially overlapping the sealing ring and the extended portion of the insulator in the axial direction of the post, the vertical contact area between the sealing ring and the extended portion is increased without reducing the lateral contact area between the two. This increases the creepage distance between the pole and the top cover body, preventing short circuits and enabling the battery top cover structure to be applied to projects requiring high voltage.

[0013] In one embodiment of the present application, a reinforcement portion is protruded from a side of the sealing ring facing the insulator, the reinforcement portion extends into the mounting hole, and is overlapped with the extension portion in the axial direction of the column portion.

[0014] Here, a reinforcement portion is added to the sealing ring so that it extends into the mounting hole and overlaps with the extension portion in the vertical direction. This can increase the creepage distance while also enhancing the strength of the sealing ring and reducing the displacement caused by the fluid force during the injection molding process, thereby ensuring the stability of the sealing ring during the injection molding process.

[0015] In an embodiment of the present application, the reinforcing portion is located between the extending portion and the column portion, and abuts against a circumferential side of the column portion.

[0016] Here, the reinforcement portion is arranged on the side of the sealing ring close to the column portion, thereby increasing the contact area with the column portion, improving the connection stability with the column portion, and further reducing the dislocation movement of the sealing ring during the injection molding process.

[0017] In one embodiment of the present application, the reinforcing portion is annular and is attached to the circumference of the column portion, and the extending portion is annular and is arranged between the hole wall of the mounting hole and the reinforcing portion;

[0018] And / or, the longitudinal cross-section of the reinforcement portion is rectangular.

[0019] The annular reinforcement portion and the annular extension portion can maximize the contact area between the sealing ring and the extension portion, thereby increasing the creepage distance at various positions of the pole and further improving the connection stability with the column portion.

[0020] The reinforcement portion has a rectangular longitudinal section for easy processing.

[0021] In one embodiment of the present application, in the axial direction of the column portion, the ratio of the overlapping height of the reinforcing portion and the extending portion to the depth of the mounting hole is at least 1 / 4 and no more than 3 / 4.

[0022] This ratio range can increase the creepage distance between the pole and the top cover body and facilitate processing and assembly.

[0023] In one embodiment of the present application, the reinforcement portion satisfies one of the following conditions:

[0024] In the axial direction of the column portion, the height of the reinforcement portion is at least 0.8 mm and not more than 1.2 mm; or

[0025] Here, according to the size of the conventional battery top cover structure, the height of the reinforcement portion is set to a suitable range value, which can meet the creepage distance requirements and is convenient for processing and assembly.

[0026] In the radial direction of the column portion, the ratio of the thickness of the reinforcement portion to the distance between the column portion and the hole wall of the mounting hole is at least 1 / 2 and no more than 2 / 3; or

[0027] Here, the thickness range of the reinforcement portion can improve the structural strength and facilitate processing.

[0028] In the radial direction of the column portion, the thickness of the reinforcement portion is at least 0.5 mm and does not exceed 0.7 mm.

[0029] The reinforcement part within this thickness range has high structural strength and good sealing effect.

[0030] In one embodiment of the present application, the outer side of the reinforcing portion facing away from the column portion is formed with a first step surface and a second step surface set at an angle, and the inner side of the extension portion is formed with a third step surface and a fourth step surface set at an angle, the first step surface is in contact with the third step surface, and the second step surface is in contact with the fourth step surface.

[0031] The reinforcement portion of this structure can further increase the creepage distance between the pole and the top cover body.

[0032] In one embodiment of the present application, a groove is formed in the middle of the outer circumference of the column portion, and a convex ring is formed on the inner circumference of the insulator, and the convex ring is clamped in the groove.

[0033] The column portion of this structure can increase the contact area with the insulator and improve the structural stability.

[0034] In one embodiment of the present application, the maximum outer diameter of the column portion is smaller than the aperture of the mounting hole, the outer diameter of the substrate is larger than the aperture of the mounting hole, the insulator is formed on the top cover body by an injection molding process, and the extension portion extending into the mounting hole and the convex ring extending into the groove are formed by an injection molding process.

[0035] The injection-molded extension and raised ring can closely match the reinforcement cloth and the groove to achieve a better sealing effect.

[0036] In one embodiment of the present application, a positioning ring is protruded from a surface of the top cover body away from the substrate, a positioning groove is formed on the insulator, and the positioning ring is confined in the positioning groove.

[0037] The top cover body of this structure can increase the connection stability with the insulator.

[0038] The present application also proposes a battery module, wherein the battery includes any of the batteries described above.

[0039] The present application also provides an electrical device, which includes the battery module described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0041] FIG1 is a schematic diagram of a partial structure of an embodiment of a battery of the present application;

[0042] FIG2 is a cross-sectional view along line AA in FIG1 ;

[0043] Figure 3 is an enlarged view of point B in Figure 2;

[0044] FIG4 is an exploded view of the battery top cover structure shown in FIG1 ;

[0045] FIG5 is a cross-sectional view of the seal ring and the insulator in another embodiment of the battery of the present application;

[0046] FIG6 is a schematic structural diagram of an embodiment of a battery module of the present application;

[0047] FIG7 is a schematic structural diagram of an example of an electrical device of the present application.

[0048] Description of Figure Numbers:

[0049] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0051] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0052] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or a solution in which both A and B are satisfied. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0054] Batteries mentioned in this field can be categorized as either disposable or rechargeable, depending on whether they are rechargeable. Common rechargeable battery types include lead-acid batteries, nickel-metal hydride batteries, and lithium-ion batteries. Lithium-ion batteries are widely used in pure electric and hybrid vehicles. While their capacity is relatively low, they offer higher output, higher charging current, and a longer service life, albeit at a higher cost.

[0055] The batteries described in the embodiments of this application are rechargeable batteries. The following description of the embodiments disclosed herein primarily uses lithium-ion batteries as an example. It should be understood that the embodiments disclosed herein are applicable to any other appropriate type of rechargeable battery. The batteries described in the embodiments disclosed herein can be directly or indirectly used in appropriate devices to power such devices.

[0056] The battery cells disclosed in the embodiments of the present application can be used, but are not limited to, in electrical equipment such as vehicles, ships, or aircraft. A power supply system comprising the battery cells, batteries, and the like disclosed in the present application can be used. The embodiments of the present application provide an electrical device that uses a battery as a power source, and the electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, and the like. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0057] The battery mentioned in the embodiments disclosed in this application refers to a single physical module that includes one or more battery cells to provide a predetermined voltage and capacity. A battery cell is the basic unit in a battery, which includes a positive electrode sheet, a negative electrode sheet, an electrolyte, and a separator. Lithium-ion battery cells mainly rely on the movement of lithium ions between the positive electrode sheet and the negative electrode sheet to work. Generally, they can be divided into cylindrical battery cells, rectangular battery cells, and soft-pack battery cells according to the packaging method. The following will mainly focus on rectangular battery cells. It should be understood that the embodiments described below are also applicable to cylindrical battery cells or soft-pack battery cells in some aspects.

[0058] A power battery generally includes a battery cell and a metal casing configured to accommodate the battery cell. The metal casing generally includes a shell body and a top cover that are connected to each other. The battery cell is located in the shell body, and the top cover is closed at the opening of the shell body to seal the interior of the battery to prevent internal leakage of the battery, extend the battery life, and improve the battery safety. Therefore, the quality of the top cover directly affects the performance of the battery.

[0059] The top cover typically has a mounting hole through which the terminal is exposed. To improve the battery's sealing and insulation, an insulator is typically formed by injection molding between the terminal and the outer surface of the top cover. A sealing ring is then placed between the terminal and the lower surface of the top cover for sealing. The insulator abuts the sealing ring through the mounting hole. However, existing sealing rings are typically flat and fit around the side of the terminal. Due to the flat contact between the sealing ring and the insulator, the creepage distance between the terminal and the main body of the top cover is relatively short, making it unsuitable for projects requiring high voltage.

[0060] Therefore, to address the problem of insufficient creepage distance between the battery terminal and the top cover body in related technologies, the present application improves the structure of the sealing ring. By arranging the sealing ring to at least partially overlap the insulator in the vertical direction, the creepage distance between the top cover body and the terminal is increased, thereby improving safety.

[0061] Referring to Figures 1 to 3, in one embodiment of the present application, a battery top cover structure 100 includes a top cover body 10, a terminal 30, an insulator 50, and a sealing ring 70. The top cover body 10 defines a mounting hole 11. The terminal 30 includes a base plate 32 and a column portion 31 connected thereto. The base plate 32 is located on one side of the top cover body 10, and the column portion 31 is inserted into the mounting hole 11.

[0062] At least part of the insulator 50 is arranged on the other side of the top cover body 10. The insulator 50 is arranged around the circumference of the column portion 31 and fixes the pole 20 to the top cover body 10. The insulator 50 is formed with an extension portion 51 on the side facing the substrate 32. The extension portion 51 is located between the hole wall of the mounting hole 11 and the column portion 31; the sealing ring 70 is located between the top cover body 10 and the substrate 32, and is arranged around the circumference of the column portion 31. The sealing ring 70 and the extension portion 51 are at least partially overlapped in the axial direction of the column portion 31.

[0063] In one example, the top cover body 10 is in the form of a sheet or plate and can cover the opening of the housing for mounting the battery cell. The top cover body 10 is provided with a mounting hole 11, the size and shape of which match the cross-sectional shape and size of the terminal 30, thereby facilitating the insertion of the terminal 30 and reducing gaps. In one example, the mounting hole 11 is a circular hole, and the cross-section of the terminal 30 is circular. It can be understood that the battery includes a positive terminal 30 and a negative terminal 30, so the top cover body 10 has two mounting holes 11 and two terminals 30. Here, the mounting structure of one terminal 30 is used as an example for description, and the mounting structure of the other terminal 30 is set accordingly.

[0064] To facilitate installation, the pole 30 includes a substrate 32 and a column portion 31. The substrate 32 is located on one side of the top cover body 10, that is, the side of the top cover body 10 facing the inside of the shell, for easy fixation. The column portion 31 passes through the mounting hole 11 and is exposed in the mounting hole 11, thereby facilitating electrical connection during application. The material of the sealing ring 70 can be plastic or silicone, which is not limited here. The sealing ring 70 is clamped between the top cover body 10 and the substrate 32, and is arranged around the circumference of the column portion 31. It can be an interference fit with the column portion 31, thereby improving the sealing effect and preventing the internal liquid from leaking through the gap between the two.

[0065] The insulator 50 is an injection-molded structure, formed based on the structure of the assembled top cover body 10, pole 30, and sealing ring 70. The sealing ring 70 is first installed around the periphery of the column portion 31. The column portion 31 is then inserted into the mounting hole 11 and placed in a mold. Injection molding material is then poured into the mold, and after cooling, the insulator 50 is formed. This method forms an insulator 50 that fits more closely with the pole 30, sealing ring 70, and top cover body 10, improving structural stability. To facilitate the insertion of the pole 30, the wall of the mounting hole 11 and the pole 30 are generally spaced apart with a clearance fit. Therefore, a portion of the insulator 50 extends between the column portion 31 and the wall of the mounting hole 11, forming an extended portion 51. The sealing ring 70 and the extension portion 51 here at least partially overlap in the axial direction of the column portion 31, that is, at least partially overlap in the vertical direction, or the projections of the two in the radial direction of the mounting hole 11 have overlapping parts. The sealing ring 70 can be a convex structure extending into the mounting hole 11, and the extension portion 51 is correspondingly formed in the gap between the sealing ring 70 and the mounting hole 11, or the sealing ring 70 can be concave to form a groove body, and the extension portion 51 passes through the mounting hole 11 and extends into the groove body. This is not limited here.

[0066] The insulator 50 in the battery top cover structure 100 of the present application is a structure formed by injection molding. By making the sealing ring 70 and the extension portion 51 of the insulator 50 at least partially overlap in the axial direction of the column portion 31, the contact area between the sealing ring 70 and the extension portion 51 in the vertical direction can be increased without reducing the contact area between the two in the lateral direction, thereby increasing the creepage distance between the pole 30 and the top cover body 10, preventing short circuit, and enabling the battery top cover structure 100 to be applied to projects with high voltage requirements.

[0067] 3 and 4 , in one embodiment of the present application, a reinforcing portion 71 is protruded from one side of the sealing ring 70 toward the insulator 50 . The reinforcing portion 71 extends into the mounting hole 11 and overlaps with the extension portion 51 in the axial direction of the column portion 31 .

[0068] In this example, the sealing ring 70 is provided with a reinforcement portion 71. The reinforcement portion 71 and the sealing ring 70 are integrally molded, facilitating processing, providing high structural strength, and excellent sealing performance. The reinforcement portion 71 extends into the mounting hole 11, and a partial gap is formed between the wall of the mounting hole 11 or the column portion 31. Therefore, during injection molding, the portion of the insulator 50 extending into the gap forms the extension portion 51. In other words, the extension portion 51 is formed in the space between the reinforcement portion 71 and the wall of the mounting hole 11, or between the reinforcement portion 71 and the column portion 31, so that the reinforcement portion 71 and the extension portion 51 vertically overlap.

[0069] The shape of reinforcement portion 71 is not limited and can be block-shaped or ring-shaped. Its radial position can be located in the middle of sealing ring 70 or on either side of sealing ring 70, and is not limited here. The provision of reinforcement portion 71 can not only increase the creepage distance, but also enhance the strength of sealing ring 70, thereby resisting some liquid impact, thereby reducing the possibility of displacement caused by fluid forces during the injection molding process and improving the stability of sealing ring 70 during the injection molding process.

[0070] 3 , in one embodiment of the present application, the reinforcing portion 71 is located between the extending portion 51 and the column portion 31 and abuts against a circumferential side of the column portion 31 .

[0071] In this example, the reinforcement portion 71 is positioned on the side of the sealing ring 70 that is closest to the column portion 31, thereby increasing the contact area with the column portion 31, improving the connection stability with the column portion 31, and further reducing the displacement of the sealing ring 70 during the injection molding process. Optionally, the side of the reinforcement portion 71 that faces the column portion 31 is flush with the inner circumference of the sealing ring 70, thereby further improving the connection stability and sealing effect.

[0072] 4 , in one embodiment of the present application, the reinforcing portion 71 is annular and fits around the periphery of the column portion 31 , and the extending portion 51 is annular and disposed between the wall of the mounting hole 11 and the reinforcing portion 71 .

[0073] And / or, the longitudinal cross-section of the reinforcement portion 71 is rectangular.

[0074] In this example, the annular reinforcement portion 71 and the annular extension portion 51 can maximize the circumferential contact area between the sealing ring 70 and the extension portion 51, thereby increasing the creepage distance at various locations on the pole 30. Furthermore, the annular reinforcement portion 71 can also increase the contact area with the column portion 31, further improving the connection stability with the column portion 31. This further reduces the risk of dislocation of the sealing ring 70 during injection molding of the insulator 50, thereby improving processing efficiency.

[0075] With or without restrictions on the overall shape of the reinforcement portion 71, the reinforcement portion 71 is assumed to have a rectangular longitudinal cross-section, that is, it has two perpendicular planes, one of which aligns with the extension portion 51, and the other with the extension portion 51. This shape of the reinforcement portion 71 facilitates processing and facilitates flow forming of the extension portion 51, thereby improving structural stability. In other examples, the longitudinal cross-section of the reinforcement portion 71 may also be triangular or a different shape.

[0076] In one embodiment of the present application, in the axial direction of the column portion 31 , the overlapping height of the reinforcing portion 71 and the extending portion 51 accounts for at least 1 / 4 and no more than 3 / 4 of the depth of the mounting hole 11 .

[0077] Because overly long and thin structures are difficult to process, in this example, in order to increase the creepage distance and facilitate processing, the overlapping height of the extension portion 51 and the reinforcement portion 71, that is, the height of the reinforcement portion 71, is set to d1, and the depth of the mounting hole 11 is set to b1. The ratio of the height of the reinforcement portion 71 d1 to the depth b1 of the mounting hole 11 is at least 1 / 4 and not more than 3 / 4, for example, 1 / 4, 3 / 8, 1 / 2, 5 / 8 or 3 / 4, etc. This ratio range can increase the creepage distance between the terminal 30 and the top cover body 10 on a battery top cover structure 100 of a specific size, and can facilitate the processing of the sealing ring 70 and the assembly of the sealing ring 70 with the terminal 30. In this embodiment, a portion of the insulator 50 is formed in the mounting hole 11 and abuts the end surface of the reinforcement portion 71, and the extension portion 51 is formed on the lower surface of this portion.

[0078] 3 , in one embodiment of the present application, the reinforcing portion 71 satisfies one of the following conditions: in the axial direction of the column portion 31 , a height d1 of the reinforcing portion 71 is at least 0.8 mm and not more than 1.2 mm.

[0079] Here, the height value d1 of the reinforcement portion 71 is set to be at least 0.8 mm and not more than 1.2 mm, for example, 0.85 mm, 0.9 mm, 0.95 mm, 1 mm, 1.05 mm, 1.1 mm, 1.15 mm, 1.2 mm, etc., so as to further increase the overlapping distance between the reinforcement portion 71 and the extension portion 51, meet the creepage distance requirements, and facilitate the processing and assembly of the sealing ring 70.

[0080] Alternatively, in the radial direction of the column portion 31 , the ratio of the thickness of the reinforcement portion 71 to the distance between the column portion 31 and the hole wall of the mounting hole 11 is at least 1 / 2 and no more than 2 / 3.

[0081] It is understandable that the thickness d2 of the reinforcement portion 71 should not be too small, thereby making it difficult to process, nor too large, thereby hindering the forming of the extension portion 51. The thickness d2 herein refers to the radial dimension of the reinforcement portion 71 in the mounting hole. The spacing between the column portion 31 and the wall of the mounting hole 11 refers to the distance between the maximum diameter of the portion of the column portion 31 located within the mounting hole 11 and the wall of the mounting hole 11, i.e., b2. Setting the ratio of the thickness d2 of the reinforcement portion 71 to b2 to at least 1 / 2 and not more than 2 / 3, i.e., 1 / 2, 7 / 12, 2 / 3, etc., can improve the structural strength of the reinforcement portion 71, facilitate processing and forming, and enhance the overall stability of the battery top cover structure 100.

[0082] Alternatively, in the radial direction of the column portion 31 , the thickness of the reinforcement portion 71 is at least 0.5 mm and no more than 0.7 mm.

[0083] According to the design of the common type of pole 30, the thickness d2 of the reinforcement portion 71 is set to at least 0.5 mm and not more than 0.7 mm, for example, 0.55 mm, 0.6 mm, 0.65 mm or 0.7 mm, etc., which has high structural strength and good sealing effect, and can meet the thickness size of the extension portion 51 so that it can be stably formed.

[0084] Please refer to Figure 5. In one embodiment of the present application, the outer side of the reinforcing portion 71 away from the column portion 31 is formed with a first step 711 and a second step surface 712 set at an angle, and the inner side of the extension portion 51 is formed with a third step surface 511 and a fourth step surface 512 set at an angle. The first step surface 711 is in contact with the third step surface 511, and the second step surface 712 is in contact with the fourth step surface 512.

[0085] In one example, a convex portion or a concave portion is formed on the outer side of the reinforcement portion 71, that is, the side facing away from the column portion 31, thereby having a first step surface 711 and a second step surface 712 at an angle. Correspondingly, a concave portion and a convex portion adapted thereto are formed on the inner side of the extension portion 51, thereby having a third step surface 511 and a fourth step surface 512 at an angle. In this way, the contact area between the extension portion 51 and the reinforcement portion 71 in the vertical direction is further increased, thereby further increasing the creepage distance between the pole 30 and the top cover body 10, thereby improving safety.

[0086] Referring to FIG. 3 again, in one embodiment of the present application, a groove 311 is formed in the middle of the outer circumference of the column portion 31 , and a convex ring 52 is formed on the inner circumference of the insulator 50 . The convex ring 52 is locked in the groove 311 .

[0087] In this example, the position of the groove 311 is not limited to being located above the reinforcement portion 71 in the axial direction, but can also be located at the end of the reinforcement portion 71. The opening of the groove 311 faces the hole wall of the mounting hole 11, and the injection-molded convex ring 52 can fit tightly with the groove 311, thereby increasing the contact area with the insulator 50 and improving the structural stability. Here, the groove 311 is limited to the middle part of the axial direction of the column portion 31, that is, the groove 311 is limited to the non-end part of the axial direction of the column portion 31, so that the formed convex ring 52 can limit the pole 30 in the axial direction, and the structure is more stable. In one example, the groove 311 is arranged in a ring shape on the column portion 31, which further improves the structural stability.

[0088] In one embodiment of the present application, the maximum outer diameter of the column portion 31 is smaller than the aperture of the mounting hole 11, the outer diameter of the substrate 32 is larger than the aperture of the mounting hole 11, the insulator 50 is formed on the top cover body 10 by an injection molding process, and the extension portion 51 extending into the mounting hole 11 and the convex ring 52 extending into the groove 311 are formed by an injection molding process.

[0089] The insulator 50 is molded after the sealing ring 70 is assembled on the pole 30 and installed in the mounting hole 11 of the top cover body 10. Therefore, the extension portion 51 and the convex ring 52 are formed between the installed pole 30 and the top cover body 10 through the injection molding process, so that the convex ring 52 and the groove 311 are more closely matched, and the extension portion 51 and the reinforcement portion 71 are more closely matched. On the other hand, it can also save assembly steps and improve processing efficiency.

[0090] In one embodiment of the present application, a positioning ring 12 is protruding from the upper surface of the top cover body 10 , and a positioning groove 53 is formed on the insulator 50 . The positioning ring 12 is confined in the positioning groove 53 .

[0091] In this example, positioning ring 12 is disposed around the periphery of mounting hole 11. The maximum cross-sectional area of ​​insulator 50 is larger than the cross-sectional area enclosed by positioning ring 12, thereby increasing the contact area with top cover body 10 and improving stability. In one example, positioning ring 12 is rectangular, with positioning groove 53 adapted thereto. Furthermore, the bottom of insulator 50 is also rectangular. This increases the contact area between top cover body 10 and insulator 50 after molding, improving the stability of the connection between the two.

[0092] The present application also provides a battery module, which includes any of the above-mentioned batteries. Since the battery adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described in detail here.

[0093] The battery can be a lithium-ion battery, a sodium-ion battery, a potassium-ion battery, an air battery, etc. The present application does not limit the specific type of the battery. For example, it can be a battery module or a battery pack. Referring to Figure 6, the battery module is a battery pack. The battery pack 1 may include a battery box and a plurality of batteries 4 arranged in the battery box. The structure of the battery 4 can refer to the battery 100 of any of the above embodiments. The battery box includes an upper box body 2 and a lower box body 3. The upper box body 2 can be covered on the lower box body 3 to form a closed space for accommodating the battery 4. Multiple battery modules 4 can be arranged in the battery box in any manner.

[0094] This application also provides an electrical device comprising the battery module described above. The specific structure of the battery module is similar to that of the aforementioned embodiments. Since this electrical device utilizes all of the technical solutions of all of the aforementioned embodiments, it possesses at least all of the beneficial effects of the technical solutions of the aforementioned embodiments, and therefore will not be further detailed here.

[0095] The power-consuming device may be a mobile phone, a laptop computer, a battery-powered vehicle, an electric vehicle, or an energy storage station. This application does not limit the specific type of the power-consuming device. When the power-consuming device includes a battery module, the battery module may be used to provide power.

[0096] Figure 7 shows an example of an electric device. The electric device is a pure electric vehicle, a hybrid electric vehicle, or a plug-in hybrid electric vehicle. To meet the high power and high energy density requirements of the electric device, a battery pack can be used.

[0097] The above description is only a preferred embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made based on the contents of the present application specification and drawings, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present application.

Claims

1. A battery, wherein: The battery comprises: A top cover body, wherein the top cover body is provided with a mounting hole; A pole, the pole comprising a base plate and a column portion connected to each other, the base plate being located on one side of the top cover body, and the column portion being inserted into the mounting hole; an insulator, at least a portion of which is disposed on the other side of the top cover body, the insulator being disposed around the periphery of the column portion and fixing the pole to the top cover body, the insulator having an extension formed on a side facing the substrate, the extension being located between the hole wall of the mounting hole and the column portion; and A sealing ring is located between the top cover body and the base plate and is arranged around the circumference of the column portion. The sealing ring and the extension portion are at least partially overlapped in the axial direction of the column portion.

2. The battery according to claim 1, wherein A reinforcement portion is protruded from one side of the sealing ring facing the insulator. The reinforcement portion extends into the mounting hole and overlaps with the extension portion in the axial direction of the column portion.

3. The battery according to claim 2, wherein The reinforcing portion is located between the extending portion and the column portion and abuts against a circumferential side of the column portion.

4. The battery according to claim 3, wherein The reinforcing portion is annular and fits on the circumference of the column portion; the extending portion is annular and is arranged between the hole wall of the mounting hole and the reinforcing portion; And / or, the longitudinal cross-section of the reinforcement portion is rectangular.

5. The battery according to any one of claims 2 to 4, wherein In the axial direction of the column portion, a ratio of an overlapping height of the reinforcing portion and the extending portion to a depth of the mounting hole is at least 1 / 4 and no more than 3 / 4.

6. The battery according to any one of claims 2 to 5, wherein The reinforcement portion satisfies one of the following conditions: In the axial direction of the column portion, the height of the reinforcement portion is at least 0.8 mm and not more than 1.2 mm; or In the radial direction of the column portion, the ratio of the thickness of the reinforcement portion to the distance between the column portion and the hole wall of the mounting hole is at least 1 / 2 and no more than 2 / 3; or In the radial direction of the column portion, the thickness of the reinforcement portion is at least 0.5 mm and does not exceed 0.7 mm.

7. The battery according to any one of claims 2 to 6, wherein The outer side of the reinforcing portion facing away from the column portion is formed with a first step surface and a second step surface set at an angle, and the inner side of the extension portion is formed with a third step surface and a fourth step surface set at an angle, the first step surface is in contact with the third step surface, and the second step surface is in contact with the fourth step surface.

8. The battery according to any one of claims 1 to 7, wherein A groove is formed in the middle of the outer circumference of the column portion, and a convex ring is formed on the inner circumference of the insulator. The convex ring is clamped in the groove.

9. The battery according to claim 8, wherein The maximum outer diameter of the column portion is smaller than the aperture of the mounting hole, the outer diameter of the substrate is larger than the aperture of the mounting hole, the insulator is formed on the top cover body by an injection molding process, and the extension portion extending into the mounting hole and the convex ring extending into the groove are formed by an injection molding process.

10. The battery according to any one of claims 1 to 9, wherein The top cover body is provided with a positioning ring protruding away from the surface of the substrate, the insulator is formed with a positioning groove, and the positioning ring is limitedly located in the positioning groove.

11. A battery module, wherein: The battery module includes the battery according to any one of claims 1 to 10.

12. An electrical device, wherein: The electric device includes the battery module according to claim 11.

Images