Battery, battery module and electric equipment

Abstract

The utility model 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 post body part and fixes the post on the top cover main body, an extension part is formed on the side, facing the substrate, of the insulator, and the extension part is located between the hole wall of the mounting hole and the post 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. According to the technical scheme provided by the utility model, the creepage distance between the pole in the battery and the top cover main body can be increased, and short circuit can be effectively prevented.

Description

Technical Field

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

[0002] A power battery generally includes a battery cell and a metal shell for accommodating the battery cell. The metal shell 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.

[0003] The top cover is generally provided with a mounting hole, through which the pole is exposed. In order to improve the sealing and insulation of the battery, an insulator is generally formed between the pole and the outer surface of the top cover by injection molding, and a sealing ring is provided between the pole and the lower surface of the top cover for sealing. The insulator abuts against the sealing ring through the mounting hole. However, the existing sealing ring is generally planar and sleeved on the peripheral side of the pole, so that the sealing ring and the insulator are in flat contact, and the creepage distance between the pole and the main body of the top cover is relatively short, which cannot meet the requirements of projects with high voltage requirements. Utility Model Content

[0004] The main purpose of the utility model is to provide a battery, aiming to increase the creepage distance between a top cover body and a pole in the battery.

[0005] To achieve the above-mentioned purpose, the battery proposed by the utility model comprises:

[0006] A top cover body, wherein the top cover body is provided with a mounting hole;

[0007] 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;

[0008] an insulator, at least part of which is disposed on the other side of the top cover body, the insulator is disposed around the periphery of the column portion and fixes the pole to the top cover body, an extension portion is formed on the side of the insulator facing the substrate, and the extension portion is located between the hole wall of the mounting hole and the column portion; and

[0009] A sealing ring is located between the top cover body and the base plate and is arranged around the circumference of the column part. The sealing ring and the extension part are at least partially overlapped in the axial direction of the column part.

[0010] The top cover body seals the opening of the shell, the column of the pole is arranged in the mounting hole and is electrically connected to the inside through the substrate, and the sealing ring is arranged on the peripheral side of the column and between the top cover body and the substrate, so as to seal the inside of the shell and prevent liquid leakage. Here, the insulator is a structure formed by injection molding, and by at least partially overlapping the sealing ring and the extended portion of the insulator in the axial direction of the column, the contact area between the sealing ring and the extended portion in the vertical direction can be increased, and the contact area between the two in the lateral direction is not reduced, so that the creepage distance between the pole and the top cover body can be increased to prevent short circuit, so that the battery top cover structure can be applied to projects with high voltage requirements.

[0011] In an embodiment of the present invention, a reinforcing portion is protruded from one side of the sealing ring facing the insulator, the reinforcing portion extends into the mounting hole, and is overlapped with the extending portion in the axial direction of the column portion.

[0012] 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.

[0013] In an embodiment of the present invention, the reinforcing portion is located between the extending portion and the column portion, and abuts against a peripheral side of the column portion.

[0014] Here, the reinforcement portion is arranged on a side of the sealing ring close to the column portion, so as to increase the contact area with the column portion, improve the connection stability with the column portion, and further reduce the dislocation movement of the sealing ring during the injection molding process.

[0015] In one embodiment of the present invention, the reinforcing portion is annular and fits the circumference of the column portion, and the extending portion is annular and is disposed between the hole wall of the mounting hole and the reinforcing portion;

[0016] And / or, the longitudinal cross-section of the reinforcement portion is rectangular.

[0017] 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.

[0018] The reinforcement part with a rectangular longitudinal section is convenient for processing.

[0019] In an embodiment of the present invention, 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 1 / 4 to 3 / 4.

[0020] This ratio range can increase the creepage distance between the pole and the top cover body and facilitate processing and assembly.

[0021] In one embodiment of the present invention, the reinforcement portion satisfies one of the following conditions:

[0022] In the axial direction of the columnar portion, the height of the reinforcement portion is 0.8 mm to 1.2 mm; or

[0023] 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 facilitate processing and assembly.

[0024] 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 1 / 2 to 2 / 3; or

[0025] Here, the thickness range of the reinforcement portion can improve the structural strength and facilitate processing.

[0026] In the radial direction of the columnar portion, the thickness of the reinforcement portion is 0.5 mm to 0.7 mm.

[0027] The reinforcement part within this thickness range has high structural strength and good sealing effect.

[0028] In one embodiment of the utility model, the outer side of the reinforcing portion facing away from the column portion forms a first step surface and a second step surface set at an angle, and the inner side of the extension portion forms 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.

[0029] The reinforcement portion of the structure can further increase the creepage distance between the pole and the top cover body.

[0030] In an embodiment of the present invention, 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.

[0031] The column part of the structure can increase the contact area with the insulator and improve the structural stability.

[0032] In one embodiment of the utility model, 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.

[0033] The extended portion and the convex ring formed by injection molding can closely cooperate with the reinforcing cloth and the groove to achieve a better sealing effect.

[0034] In an embodiment of the present invention, 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.

[0035] The top cover body of this structure can increase the connection stability with the insulator.

[0036] The utility model also provides a battery module, wherein the battery comprises any of the batteries described above.

[0037] The utility model also provides an electrical device, which includes the battery module as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0039] Figure 1 It is a partial structural schematic diagram of an embodiment of a battery of the utility model;

[0040] Figure 2 for Figure 1 Sectional view along line AA;

[0041] Figure 3 for Figure 2 The enlarged view of point B in the middle;

[0042] Figure 4 for Figure 1 An exploded view of the battery top cover structure shown;

[0043] Figure 5 A cross-sectional view of the seal ring and the insulator in another embodiment of the battery of the utility model;

[0044] Figure 6 This is a schematic structural diagram of an embodiment of a battery module of the utility model;

[0045] Figure 7 The figure is a schematic structural diagram of an example of the electrical equipment of the utility model.

[0046] Description of Figure Numbers:

[0047] Label name Label name 100 Battery 511 The third step surface 10 Top cover body 512 Fourth step surface 11 Mounting holes 52 convex ring 12 Locating ring 53 Positioning slot 30 Pole 70 Sealing ring 31 Column 71 Strengthening Department 311 Grooves 711 First step surface 32 substrate 712 Second step surface 50 Insulator 90 Lower plastic 51 Extension

[0048] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0050] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0051] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes 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 the features. In addition, the meaning of "and / or" appearing in the full 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 that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0053] Batteries mentioned in this field can be divided into disposable batteries and rechargeable batteries according to whether they are rechargeable. Common types of rechargeable batteries currently include: lead-acid batteries, nickel-metal hydride batteries and lithium-ion batteries. Lithium-ion batteries are currently widely used in pure electric vehicles and hybrid vehicles. The capacity of lithium-ion batteries used for this purpose is relatively low, but they have larger output and charging current, and also have a longer service life, but the cost is higher.

[0054] The battery described in the embodiments of the present invention refers to a rechargeable battery. The embodiments disclosed in the present invention will be described below mainly by taking a lithium-ion battery as an example. It should be understood that the embodiments disclosed in the present invention are applicable to any other appropriate type of rechargeable battery. The battery mentioned in the embodiments disclosed in the present invention can be directly or indirectly applied to an appropriate device to power the device.

[0055] The battery cell disclosed in the embodiment of the utility model can be used, but not limited to, in electrical equipment such as vehicles, ships or aircraft. The power supply system of the electrical equipment can be composed of the battery cell, battery, etc. disclosed in this application. The embodiment of the present application provides an electrical equipment using a battery as a power source, and the electrical equipment can be, but not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toys can include fixed or mobile electric toys, for example, game consoles, electric car toys, electric ship toys, electric airplane toys, and the like, and the spacecraft can include airplanes, rockets, space shuttles, spacecrafts, and the like.

[0056] The battery mentioned in the embodiments disclosed in the present utility model refers to a single physical module including one or more battery cells to provide a predetermined voltage and capacity. A battery cell is a basic unit in a battery, which includes a positive electrode plate, a negative electrode plate, an electrolyte and a separator. Lithium-ion battery cells mainly rely on the movement of lithium ions between the positive electrode plate and the negative electrode plate 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.

[0057] A power battery generally includes a battery cell and a metal shell for accommodating the battery cell. The metal shell 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 covered on the opening of the shell body to seal the inside of the battery to prevent internal leakage of the battery, thereby extending the service life of the battery and improving the safety of the battery. Therefore, the quality of the top cover directly affects the performance of the battery.

[0058] The top cover is generally provided with a mounting hole, through which the pole is exposed. In order to improve the sealing and insulation of the battery, an insulator is generally formed between the pole and the outer surface of the top cover by injection molding, and a sealing ring is arranged between the pole and the lower surface of the top cover for sealing. The insulator abuts against the sealing ring through the mounting hole. However, the existing sealing ring is generally planar and sleeved on the peripheral side of the pole. Since the sealing ring and the insulator are in flat contact, the creepage distance between the pole and the main body of the top cover is relatively short, which cannot meet the requirements of projects with high voltage requirements.

[0059] Therefore, in order to solve the problem of insufficient creepage distance between the pole and the top cover body in the battery in the related art, the utility model improves the structure of the sealing ring. By arranging the sealing ring to at least partially overlap with the insulator in the vertical direction, the creepage distance between the top cover body and the pole is increased, thereby improving safety.

[0060] Please refer to Figures 1 to 3 In one embodiment of the utility model, the battery top cover structure 100 includes a top cover body 10, a pole 30, an insulator 50 and a sealing ring 70, wherein the top cover body 10 is provided with a mounting hole 11; the pole 30 includes a base plate 32 and a column part 31 connected to each other, the base plate 32 is located at one side of the top cover body 10, and the column part 31 is penetrated in the mounting hole 11;

[0061] 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 part 31 and fixes the pole 20 to the top cover body 10, and the insulator 50 is formed with an extension portion 51 on the side facing the substrate 32, and the extension portion 51 is located between the hole wall of the mounting hole 11 and the column part 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 part 31, and the sealing ring 70 and the extension portion 51 are at least partially overlapped in the axial direction of the column part 31.

[0062] In one example, the top cover body 10 is in the form of a sheet or plate, and can cover the opening of the shell for installing the battery cell. The top cover body 10 is provided with a mounting hole 11, and the size and shape of the mounting hole 11 are adapted to the cross-sectional shape and size of the pole 30, so as to facilitate the insertion of the pole 30 and reduce the gap. In one example, the mounting hole 11 is a circular hole, and the cross-section of the pole 30 is circular. It can be understood that the battery includes a positive pole 30 and a negative pole 30, so the top cover body 10 has two mounting holes 11 and two poles 30. Here, the mounting structure of one pole 30 is taken as an example for explanation, and the mounting structure of the other pole 30 is set accordingly.

[0063] For easy installation, the pole 30 includes a substrate 32 and a column 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 31 passes through the mounting hole 11 and is exposed in the mounting hole 11, so as to facilitate 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 31. It can be an interference fit with the column 31, thereby improving the sealing effect and preventing the internal liquid from leaking through the gap between the two.

[0064] The insulator 50 is an injection-molded structure, which is molded according to the structure of the assembled top cover body 10, the pole 30 and the sealing ring 70. First, the sealing ring 70 is installed on the peripheral side of the column part 31, and then the column part 31 is inserted into the mounting hole 11 and placed in the mold, so that the injection molding material is poured into the mold, and the insulator 50 is formed after cooling. The insulator 50 formed in this way can be more closely matched with the pole 30, the sealing ring 70 and the top cover body 10, thereby improving the structural stability. In order to facilitate the insertion of the pole 30, the hole wall of the mounting hole 11 and the pole 30 are generally clearance-matched, so that the insulator 50 will partially extend between the column part 31 and the hole wall of the mounting hole 11, thereby forming an extension 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 concavely formed with a groove body, and the extension portion 51 passes through the mounting hole 11 and extends into the groove body. No limitation is made here.

[0065] The insulator 50 in the battery top cover structure 100 of the utility model 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 abutment 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 to prevent short circuit, so that the battery top cover structure 100 can be applied to projects with high voltage requirements.

[0066] Please refer to Figure 3 and Figure 4 In one embodiment of the utility model, the sealing ring 70 is provided with a reinforcing portion 71 protruding from one side of the insulator 50 , the reinforcing portion 71 extends into the mounting hole 11 and overlaps with the extending portion 51 in the axial direction of the column portion 31 .

[0067] In this example, the sealing ring 70 is provided with a reinforcing portion 71, and the reinforcing portion 71 and the sealing ring 70 are an integrally formed structure, which is convenient for processing, has high structural strength, and good sealing performance. The reinforcing portion 71 extends into the mounting hole 11, and forms a partial gap with the hole wall of the mounting hole 11 or the column portion 31, so that during injection molding, the portion of the insulator 50 extending into the gap forms an extension portion 51, that is, the extension portion 51 is formed in the space between the reinforcing portion 71 and the hole wall of the mounting hole 11, or the space between the reinforcing portion 71 and the column portion 31, so that the reinforcing portion 71 and the extension portion 51 are overlapped in the vertical direction.

[0068] The shape of the reinforcement part 71 is not limited, and it can be block-shaped or ring-shaped. Its radial position can be located in the middle of the sealing ring 70 or on either side of the sealing ring 70, which is not limited here. The arrangement of the reinforcement part 71 can increase the creepage distance while also enhancing the strength of the sealing ring 70, and can resist some liquid impact, thereby reducing the probability of deviation caused by fluid force during the injection molding process, and improving the stability of the sealing ring 70 during the injection molding process.

[0069] Please continue to refer to Figure 3 In one embodiment of the present invention, the reinforcing portion 71 is located between the extending portion 51 and the column portion 31 , and abuts against the circumferential side of the column portion 31 .

[0070] In this example, the reinforcing portion 71 is disposed on the side of the sealing ring 70 close 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 dislocation movement of the sealing ring 70 during the injection molding process. Optionally, the side of the reinforcing portion 71 facing the column portion 31 is on the same plane as the inner circumference of the sealing ring 70, thereby further improving the connection stability and sealing effect.

[0071] Please refer to Figure 4 In one embodiment of the present invention, the reinforcing portion 71 is annular and fits the circumference of the column portion 31 , and the extending portion 51 is annular and is disposed between the hole wall of the mounting hole 11 and the reinforcing portion 71 ;

[0072] And / or, the longitudinal section of the reinforcement portion 71 is rectangular.

[0073] In this example, the annular reinforcement portion 71 and the annular extension portion 51 can maximize the contact area between the sealing ring 70 and the extension portion 51 in the circumferential direction, thereby increasing the creepage distance at various positions of the pole 30. At the same time, the annular reinforcement portion 71 can also increase the contact area with the column portion 31, which can further improve the connection stability with the column portion 31. In this way, when the insulator 50 is injection molded, the risk of dislocation and movement of the sealing ring 70 can be further reduced, thereby improving processing efficiency.

[0074] On the basis of limiting or not limiting the overall shape of the reinforcing portion 71, the longitudinal section of the reinforcing portion 71 is set to be rectangular, that is, it has two planes arranged perpendicularly, one of which is in contact with the extension portion 51, and the other surface is in contact with the extension portion 51. The reinforcing portion 71 of this shape is easy to process and facilitates the flow forming of the extension portion 51, thereby improving the structural stability. In other examples, the longitudinal section of the reinforcing portion 71 may also be triangular or irregular.

[0075] In an embodiment of the present invention, in the axial direction of the column portion 31 , the ratio of the overlapping height of the reinforcing portion 71 and the extending portion 51 to the depth of the mounting hole 11 is 1 / 4 to 3 / 4.

[0076] Because the overly long and thin structure is not easy to process, in this example, in order to increase the creepage distance and facilitate processing, the overlapping height of the extension part 51 and the reinforcement part 71, that is, the height of the reinforcement part 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 part 71 to the depth b1 of the mounting hole 11 is 1 / 4 to 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 pole 30 and the top cover body 10 on a battery top cover structure 100 of a specific size, and facilitate the processing of the sealing ring 70, and facilitate the assembly of the sealing ring 70 and the pole 30. In this embodiment, a part of the structure of the insulator 50 is formed in the mounting hole 11 and abuts against the end face of the reinforcement part 71, and the extension part 51 is formed on the lower surface of the part of the structure.

[0077] Please refer to Figure 3 In one embodiment of the present invention, the reinforcing portion 71 satisfies one of the following conditions: in the axial direction of the column portion 31 , a height value d1 of the reinforcing portion 71 is 0.8 mm to 1.2 mm.

[0078] Here, the height value d1 of the reinforcement portion 71 is set to 0.8mm~1.2mm, for example, 0.85mm, 0.9mm, 0.95mm, 1mm, 1.05mm, 1.1mm, 1.15mm, 1.2mm, 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.

[0079] Alternatively, in the radial direction of the column portion 31 , the ratio of the thickness of the reinforcing portion 71 to the distance between the column portion 31 and the hole wall of the mounting hole 11 is 1 / 2 to 2 / 3.

[0080] It is understandable that the thickness d2 of the reinforcing portion 71 should not be too small, so as to be inconvenient to process, and the thickness d2 should not be too large, so as to be unfavorable to the forming of the extension portion 51. The thickness d2 here refers to the radial dimension of the reinforcing portion 71 in the mounting hole. The spacing between the column portion 31 and the hole wall of the mounting hole 11 refers to the distance between the maximum diameter of the portion of the column portion 31 located in the mounting hole 11 and the hole wall of the mounting hole 11, that is, b2. The ratio of the thickness d2 of the reinforcing portion 71 to b2 is set to 1 / 2 to 2 / 3, that is, 1 / 2, 7 / 12, 2 / 3, etc., which can improve the structural strength of the reinforcing portion 71, facilitate processing and forming, and improve the overall stability of the battery top cover structure 100.

[0081] Alternatively, in the radial direction of the columnar portion 31 , the thickness of the reinforcement portion 71 is 0.5 mm to 0.7 mm.

[0082] Designed according to the common type of pole 30, the thickness d2 of the reinforcement portion 71 is set in the range of 0.5mm to 0.7mm, for example, 0.55mm, 0.6mm, 0.65mm or 0.7mm, etc., with high structural strength and good sealing effect, and can meet the thickness size of the extension portion 51 to enable stable molding.

[0083] Please refer to Figure 5 In one embodiment of the utility model, 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.

[0084] 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, so as to have 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, so as to have 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, so that the creepage distance between the pole 30 and the top cover body 10 can be further increased, thereby improving safety.

[0085] Please refer to Figure 3 In one embodiment of the present invention, 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 clamped in the groove 311 .

[0086] In this example, the position of the groove 311 is not limited to being located above the reinforcing portion 71 in the axial direction, but can also be located at the end of the reinforcing 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 part 31, that is, the groove 311 is limited to the non-end part of the axial direction of the column part 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 part 31 to further improve the structural stability.

[0087] In one embodiment of the utility model, 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.

[0088] 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 part 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 part 51 and the reinforcement part 71 are more closely matched. On the other hand, it can also save assembly steps and improve processing efficiency.

[0089] In an embodiment of the present invention, 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 .

[0090] In this example, the positioning ring 12 is arranged around the periphery of the mounting hole 11, and the maximum cross-sectional area of ​​the insulator 50 is larger than the cross-sectional area enclosed by the positioning ring 12, thereby increasing the contact area with the top cover body 10 and improving stability. In one example, the positioning ring 12 is in a rectangular ring shape, the positioning groove 53 is adapted thereto, and the bottom shape of the insulator 50 is also a rectangular parallelepiped, so that after molding, the top cover body 10 can increase the contact area with the insulator 50 and improve the connection stability between the two.

[0091] The utility model also provides a battery module, the battery module comprising 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 one by one here.

[0092] The battery may 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 may be a battery module or a battery pack, etc. Figure 6 The battery module is a battery pack, and the battery pack 1 may include a battery box and a plurality of batteries 4 disposed in the battery box. The structure of the battery 4 may 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. The plurality of battery modules 4 may be arranged in the battery box in any manner.

[0093] The utility model also provides an electric device, which includes the battery module as described above. The specific structure of the battery module refers to the above embodiment. Since the electric device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0094] The electrical device may be a mobile phone, a laptop computer, a battery car, an electric car, an energy storage station, etc. The present application does not limit the specific type of the electrical device. When the electrical device includes a battery module, the electrical energy may be provided by the battery module.

[0095] Figure 7 The power consumption device is taken as an example. The power consumption device is a pure electric vehicle, a hybrid electric vehicle or a plug-in hybrid electric vehicle, etc. In order to meet the power consumption device's requirements for high power and high energy density of the battery, a battery pack can be used.

[0096] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A battery, characterized in that: 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 part of which is disposed on the other side of the top cover body, the insulator is disposed around the periphery of the column portion and fixes the pole to the top cover body, an extension portion is formed on the side of the insulator facing the substrate, and the extension portion is 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 part. The sealing ring and the extension part are at least partially overlapped in the axial direction of the column part.

2. The battery according to claim 1, characterized in that A reinforcing portion is protruded from one side of the sealing ring toward the insulator. The reinforcing portion extends into the mounting hole and overlaps with the extending portion in the axial direction of the column portion.

3. The battery according to claim 2, characterized in that The reinforcing portion is located between the extending portion and the column portion, and abuts against a peripheral side of the column portion.

4. The battery according to claim 3, characterized in that The reinforcing portion is annular and fits 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; And / or, the longitudinal cross-section of the reinforcement portion is rectangular.

5. The battery according to any one of claims 2 to 4, characterized in that 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 1 / 4 to 3 / 4.

6. The battery according to any one of claims 2 to 4, characterized in that The reinforcement portion satisfies one of the following conditions: In the axial direction of the columnar portion, the height of the reinforcement portion is 0.8 mm to 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 1 / 2 to 2 / 3; or In the radial direction of the columnar portion, the thickness of the reinforcement portion is 0.5 mm to 0.7 mm.

7. The battery according to any one of claims 2 to 4, characterized in that The outer side of the reinforcing portion facing away from the column portion forms a first step surface and a second step surface set at an angle, and the inner side of the extension portion forms 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 4, characterized in that The middle part of the outer circumference of the column part is recessed to form a groove, and the inner circumference of the insulator is formed with a convex ring, and the convex ring is clamped in the groove.

9. The battery according to claim 8, characterized in that 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 4, characterized in that 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 limited in the positioning groove.

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

12. An electrical device, characterized in that: The electric device comprises the battery module as claimed in claim 11.

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