CN220873788U - Riveting structure, cover plate assembly, battery monomer, battery module and electric equipment - Google Patents

Abstract

The utility model provides a riveting structure, a cover plate assembly, a battery cell, a battery module and electric equipment, wherein the riveting structure comprises: the battery module comprises a body, a cover plate assembly and a cover plate assembly, wherein the body is provided with a first surface and a second surface which are opposite in a first direction, and the first surface is close to the cover plate assembly in the battery cell relative to the second surface; the two extending parts are connected to the opposite ends of the body in the second direction, the second direction is perpendicular to the first direction, and the extending parts are used for connecting adjacent battery cells; the force transmitted to the pole in the testing process of vibration impact and the like is reduced, so that the safety of the battery cell is improved.

Description

Riveting structure, cover plate assembly, battery monomer, battery module and electric equipment

Technical Field

The utility model belongs to the technical field of batteries, and particularly relates to a riveting structure, a cover plate assembly, a battery cell, a battery module and electric equipment.

Background

In the related battery module, connect and fix the battery monomer through setting up the tab, specifically, fix the utmost point post in tab and the battery monomer through welded mode, in welded in-process, the utmost point post is easily received the influence of the power of shock impact etc. test in-process transmission, and the utmost point post structure is fragile.

Disclosure of utility model

In view of this, the present utility model provides a riveted structure, a cover plate assembly, a battery cell, a battery module and an electric device, so as to solve the technical problem of how to reduce the force transmitted to the pole in the testing process such as vibration impact.

The technical scheme of the utility model is realized as follows:

The embodiment of the utility model provides a riveting structure, which comprises:

The battery cell comprises a body, a first cover plate and a second cover plate, wherein the body is provided with a first surface and a second surface which are opposite in a first direction, and the first surface is close to the cover plate assembly in the battery cell relative to the second surface;

The two extending parts are connected to two opposite ends of the body in the second direction, the second direction is perpendicular to the first direction, and the extending parts are used for connecting adjacent battery cells.

In some embodiments, the extending portions are a first extending portion and a second extending portion, where one end of the first extending portion, which is far away from the body in the second direction, is a first connecting surface, and one end of the second extending portion, which is far away from the body in the second direction, is a second connecting surface, and the first connecting surface is welded with the second connecting surface of the adjacent battery cell.

In some embodiments, further comprising:

the first limiting part is positioned on the first extending part;

The second limiting part is positioned on the second extending part and is in limiting connection with the first limiting part.

In some embodiments, the first limiting portion forms a concave structure on the first connecting surface; the second limiting part forms a convex structure on the second connecting surface; or, the first limiting part forms a protruding structure on the first connecting surface; the second limiting part forms a concave structure on the second connecting surface.

In some embodiments, the extension portion is provided with a punch-formed bead, and an extension direction of the bead is perpendicular to the first direction and the second direction.

In some embodiments, further comprising:

And the safety piece is arranged in the extension part.

In some embodiments, a cross-section of the extension is perpendicular to the second direction, and a cross-sectional area of the extension at the reduced diameter is smaller than a cross-sectional area at a non-reduced diameter, wherein the fuse is disposed at the reduced diameter.

The embodiment of the utility model also provides a cover plate assembly, which comprises:

The top cover is provided with a mounting hole;

The first insulating piece is arranged on the top of the top cover;

the second insulating piece is arranged at the bottom of the top cover;

a post at least partially passing through the second insulator and extending into the mounting hole;

The riveted structure of any one of the above claims, disposed on a side of the first insulating member away from the top cover, the body being connected with the pole.

The embodiment of the utility model provides a battery cell, which comprises the cover plate assembly.

The embodiment of the utility model provides a battery module, which comprises the battery cell.

The embodiment of the utility model provides electric equipment, which comprises the battery module.

The embodiment of the utility model provides a riveting structure, which comprises a body and an extension part, wherein the body is provided with a first surface and a second surface which are opposite in a first direction, the first surface is close to a cover plate assembly of a battery cell relative to the second surface, the extension part is provided with at least two, the extension part is at least connected with two opposite ends of the body in a second direction, the second direction is perpendicular to the first direction, and the extension part is used for connecting adjacent battery cells. According to the embodiment of the utility model, the riveting structure is arranged as the body and the extension parts connected with the body at the two ends of the second direction, the body is used for connecting the cover plate assemblies of the battery monomers, the extension parts are used for connecting the cover plate assemblies of the adjacent battery monomers, the body and the extension parts are arranged in a staggered manner in the second direction, and in the process of connecting the extension parts with the adjacent battery monomers, heat generated in the welding process is far away from the polar columns and the cover plate assemblies of the battery monomers, so that risks of softening plastics and the like due to heat input in the welding process are reduced, the influence of the cover body assemblies on the air tightness of the battery monomers is reduced, the risk of damaging the polar columns is reduced, the reliability of the connection of the polar columns is improved, and the welding position of the extension parts and the adjacent battery monomers is far away from the polar columns, so that the arrangement of the thickness of the polar columns is less influenced by the limitation of overcurrent, and the arrangement height of the polar columns is reduced; and the extension part is far away from the pole with adjacent battery monomer welded position, is favorable to reducing the effort of welding position to the pole at battery impact vibration's in-process to reduce the risk to the pole damage, with further structural strength and the reliability of connection that improves the pole.

Drawings

FIG. 1 is a perspective view of a rivet structure according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a cover assembly according to an embodiment of the present utility model;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is an exploded view of a cover plate assembly according to an embodiment of the present utility model;

Fig. 5 is a schematic structural view of a battery module according to an embodiment of the present utility model.

Reference numerals illustrate:

1. A riveted structure; 100. a body; 101. a first surface; 102. a second surface; 110. an extension; 110a, a first extension; 110b, a second extension; 111. a first connection surface; 112. a second connection surface; 113. convex ribs; 114. reducing the diameter; 120. a first limit part; 130. a second limit part; 200. a cover plate assembly; 201. a top cover; 202. a first insulating member; 203. a second insulating member; 204. a pole; 300. and (3) a battery cell.

Detailed Description

Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof herein are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present utility model, the technical terms "first," "second," "third," etc. are used merely to distinguish between different objects and should not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present utility model, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this context, the character "/" generally indicates that the associated object is an "or" relationship.

In the description of the embodiments of the present utility model, the azimuth or positional relationship indicated by the technical terms "width", "inside", "outside", "bottom", "upper", "lower", etc. are based on the azimuth or positional relationship shown in fig. 1 and 3, and are merely for convenience of describing the embodiments of the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific azimuth, be configured, operated, or used in a specific azimuth, and thus should not be construed as limiting the embodiments of the present utility model.

In the description of the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.

In the description of the embodiments of the present utility model, unless explicitly specified and limited otherwise, the term "contact" is to be understood in a broad sense as either direct contact or contact across an intermediate layer, as either contact with substantially no interaction force between the two in contact or contact with interaction force between the two in contact.

At present, new energy batteries are increasingly widely applied to life and industry. The new energy battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

As part of the inventive concept, before describing the embodiments of the present utility model, the cause of the air tightness failure in the welding process of the battery cell in the related art needs to be analyzed, and the technical solution of the embodiments of the present utility model is obtained through reasonable analysis.

Among the relevant battery module, connect and fix the battery monomer through setting up the balun, specifically, fix the utmost point post in balun and the battery monomer through welded mode, at welded in-process, because it is great to pierce through welding heat input, cause the phenomenon that the plastic softens in the battery monomer and the sealing washer kick-backs easily to lead to the free gas tightness of battery to fail because of not satisfying the requirement.

In view of this, the embodiment of the utility model reduces the risk of damage to the pole by changing the welding mode of the pole, reduces the risk of failure of the sealing performance of the battery monomer, and improves the reliability of pole connection.

The scheme of the embodiment of the utility model can be applied to a battery pack comprising a battery cell or a battery module, and can also be applied to an electric device comprising the battery cell and the battery pack. Through changing the structure of riveting structure, reduce the risk that the welding heat input volume of utmost point post junction is big to be favorable to improving utmost point post structural strength and connection reliability.

The electric device is a device which takes electric energy as energy source and realizes corresponding functions by consuming the electric energy. Illustratively, the powered device may be, but is not limited to, a cell phone, tablet, notebook computer, electric toy, electric tool, battery car, electric car, ship, spacecraft, etc. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

The power consumption device of the embodiment of the utility model can comprise a device main body and a power supply device, wherein the power supply device is used for supplying power to the device main body, and the power supply device can comprise a battery cell or a battery pack.

The device body is a body structure which consumes electric energy to realize corresponding functions. For example, the power consumption device may be a mobile phone, and the device body is a part capable of realizing functions such as communication, and power is supplied to the part capable of realizing functions such as communication through a battery cell or a battery pack. For example, the power consumption device may be an automobile, and the device body is a part that can be taken by a person and can travel on a road, and power is supplied to the part that can be taken by a person and can travel on a road by a battery cell or a battery pack.

The power supply device refers to a device capable of outputting electric power. For example, the electric power may be output through a battery cell. The electrical energy may be output by way of a battery pack of battery cells, for example. The electric power may be output through a battery module constituted of battery cells, for example.

The electric device according to an embodiment of the present utility model will be described by taking a vehicle as an example.

The vehicle provided by the embodiment of the utility model can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle and the like. The interior of the vehicle is provided with a battery pack, which may be provided at the bottom or at the head or at the tail of the vehicle. The battery pack may be used for power supply of the vehicle, for example, the battery pack may be used as an operating power source of the vehicle. The vehicle may further include a controller and a motor, the controller being operable to control the battery pack to power the motor. For example, the battery pack may be used for operating power requirements during start-up, navigation, and travel of the vehicle.

In some embodiments of the utility model, the battery pack may be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, instead of or in part instead of fuel oil or natural gas, to provide driving power for the vehicle.

The battery pack of the embodiment of the utility model can comprise a battery box body and a battery monomer, wherein the battery monomer is positioned in the battery box body. The battery box body is a structure with an accommodating space, and the battery cells are positioned in the battery box body and accommodate the battery cells of the battery pack through the battery box body.

The number of the battery cells can be multiple, and the multiple battery cells can be connected in series or in parallel, wherein the series-parallel connection refers to that the multiple battery cells are connected in series or in parallel. The plurality of battery monomers can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery monomers is placed in the battery box body. Of course, the plurality of battery cells can be connected in series or in parallel or in series-parallel to form a battery module, and then the plurality of battery modules are connected in series or in parallel or in series-parallel to form a whole, and the whole formed by connecting the plurality of battery modules in series or in parallel or in series-parallel is placed in the battery box. The battery pack may further include other structures, for example, the battery pack may further include a bus member for making electrical connection between the plurality of battery cells.

The battery cell refers to a basic unit capable of achieving the mutual conversion of chemical energy and electric energy.

In the embodiment of the utility model, the battery cell may be a secondary battery, and the secondary battery refers to a battery cell that can activate the active material in a charging manner to continue to use after the battery cell discharges.

In the embodiment of the present utility model, the battery cell may be a lithium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, or the like, which is not limited in the embodiment of the present utility model.

The embodiment of the present utility model provides a rivet structure, as shown in fig. 1, the rivet structure 1 includes a body 100 and at least two extensions 110. The body 100 is used for fixing with a pole, and the extension 110 is connected to one end of the body 100 in the second direction (refer to the X-axis direction shown in fig. 1). As shown in fig. 2 and 3, the body 100 has a first surface 101 and a second surface 102 opposite to each other in a first direction (a Z-axis direction shown in fig. 3), and it should be noted that, the first direction may be understood as an up-down direction of the battery cell in a normal use state, and may be understood as a vertical direction in an absolute coordinate system. Wherein the first surface 101 is close to the cover assembly 200 in the battery cell with respect to the second surface 102, that is, the first surface 101 is in contact with the cover assembly 200, and the second surface 102 is away from the cover assembly 200 with respect to the first surface 101.

The two extending portions 110 in the embodiment of the present utility model are disposed, that is, the extending portions 110 are connected at opposite ends of the body 100 in the second direction, and the second direction is perpendicular to the first direction. That is, the extension portion 110 in the embodiment of the present utility model may be disposed to protrude in the length direction of the battery cell with respect to the body 100, or may be disposed to protrude in the width direction of the battery cell with respect to the body 100, as long as the extension portion 110 and the body 100 are disposed in a staggered manner in the horizontal direction, wherein the width direction and the length direction of the battery cell in the normal use state are defined to be located in the horizontal direction. The extension 110 in the embodiment of the present utility model is used to connect adjacent battery cells. The embodiment of the utility model is suitable for the battery cells with larger size by arranging the plurality of extension parts 110, and is beneficial to improving the absorption and buffering effects of the riveting structure on expansion by increasing the number of the extension parts under the condition that the battery cells expand greatly.

Specifically, the battery module is formed by arranging a plurality of battery cells according to a set direction, and the battery cells are connected together in a serial or parallel mode to form the battery module. The series connection means that the positive electrode and the negative electrode of the battery monomers are sequentially connected, so that the voltage of the battery module is increased; and the parallel connection means that the positive electrode, the negative electrode and the negative electrode of the battery unit are connected together, so that the current capacity of the battery module is increased. Through different serial-parallel connection modes, battery modules with different voltages and current capacities can be formed and used for meeting different power requirements.

The body 100 in the embodiment of the present utility model is connected to a cap assembly of a battery cell, and in particular, the body 100 is connected to a post in the cap assembly. What the extension 110 connects adjacent battery cells means is that if a plurality of battery cells are arranged along the width direction of the battery cells, the extension 110 can connect the opposite ends of the body 100 in the width direction of the battery cells, the extension 110 can also connect the opposite ends of the body 100 in the length direction of the battery cells, no matter which end of the body 100 is connected, as long as the connection between the extension 110 and the adjacent battery cells can be realized. In the embodiment of the utility model, the riveting structure is arranged in a mode that one body is connected with two extension parts at two ends of the body in the second direction, the riveting structure is suitable for scenes that the width of the pole is more than 0 and the width of the battery cell is less than 2/3, and under the condition that the ratio of the width of the pole to the width of the battery cell is smaller, the welding positions of the two extension parts are far away from the pole by arranging the riveting structure in the implementation mode, so that the influence of welding heat input on the pole is reduced; the force transmitted to the pole in the testing process of vibration impact and the like is reduced, so that the safety of the battery cell is improved.

The embodiment of the utility model provides a riveting structure, which comprises a body and an extension part, wherein the body is provided with a first surface and a second surface which are opposite in a first direction, the first surface is close to a cover plate assembly of a battery cell relative to the second surface, the extension part is provided with at least two, the extension part is at least connected with two opposite ends of the body in a second direction, the second direction is perpendicular to the first direction, and the extension part is used for connecting adjacent battery cells. According to the embodiment of the utility model, the riveting structure is arranged as the body and the extension parts connected with the body at the two ends of the second direction, the body is used for connecting the cover plate assemblies of the battery monomers, the extension parts are used for connecting the cover plate assemblies of the adjacent battery monomers, the body and the extension parts are arranged in a staggered manner in the second direction, and in the process of connecting the extension parts with the adjacent battery monomers, heat generated in the welding process is far away from the polar columns and the cover plate assemblies of the battery monomers, so that risks of softening plastics and the like due to heat input in the welding process are reduced, the influence of the cover body assemblies on the air tightness of the battery monomers is reduced, the risk of damaging the polar columns is reduced, the reliability of the connection of the polar columns is improved, and the welding position of the extension parts and the adjacent battery monomers is far away from the polar columns, so that the arrangement of the thickness of the polar columns is less influenced by the limitation of overcurrent, and the arrangement height of the polar columns is reduced; and the extension part is far away from the pole with adjacent battery monomer welded position, is favorable to reducing the effort of welding position to the pole at battery impact vibration's in-process to reduce the risk to the pole damage, with further structural strength and the reliability of connection that improves the pole.

In some embodiments, as shown in fig. 1, two extending portions 110 are provided, namely, a first extending portion 110a and a second extending portion 110b, where one end of the first extending portion 110a away from the body 100 in the second direction (refer to the X direction shown in fig. 1) is a first connecting surface 111, specifically, the first extending portion 110a has opposite ends in the second direction, where one end is connected to the body 100, the other end is away from the body 100, and an end surface of the first extending portion 110a away from the body 100 is the first connecting surface 111. One end of the second extension portion 110b away from the body 100 in the second direction (refer to the X direction shown in fig. 1) is a second connection surface 112, and the second extension portion 110b has opposite ends in the second direction, wherein one end is connected to the body 100, the other end is away from the body 100, and an end surface of the second extension portion 110b away from the body 100 is the second connection surface 112. The body 100 in the riveted structure is used for being connected with the pole of the battery cell, and the first connecting surface 111 in the riveted structure is used for being welded with the second connecting surface 112 in the riveted structure on the adjacent battery cell. That is, the connection between the adjacent two battery cells is achieved through the surface contact and surface welding of the first connection surface 111 and the second connection surface 112 in the rivet structure, on one hand, the welded position is far away from the pole in the second direction, which is favorable for reducing the thermal influence and damage to the pole, and on the other hand, the welded contact area is larger, which is favorable for improving the welding stability.

In some embodiments, as shown in fig. 1, the riveted structure further includes a first spacing portion 120 and a second spacing portion 130. The first limiting portion 120 is located at the first extending portion, the second limiting portion 130 is located at the second extending portion 110b, and the second limiting portion 130 is in limiting connection with the first limiting portion 120, so as to be limited in at least one direction perpendicular to the first direction (perpendicular to the Z-axis direction shown in fig. 1). The first direction perpendicular to the first direction may be understood as any direction in the plane formed by the XY axes in fig. 1, that is, at least one direction of the first limiting portion 120 and the second limiting portion 130 in the plane surrounded by the XY axes may be limited. The limiting direction can be the length direction of the battery cell or the width direction of the battery cell. According to the embodiment of the utility model, the first limiting part and the second limiting part are arranged to limit in at least one direction perpendicular to the first direction, and in the process of connecting two adjacent riveting structures, the first limiting part and the second limiting part can be limited relatively, so that the relative position of the first connecting surface 111 and the second connecting surface 112 perpendicular to the first direction is kept fixed, the risk of relative shaking of the first connecting surface 111 and the second connecting surface 112 in the welding process is reduced, the stability of the welding process of the adjacent riveting structures is improved, and the welding quality is improved.

In some embodiments, as shown in fig. 1, the first limiting portion 120 forms a concave structure on the first connecting surface 111; the second limiting part 130 forms a protruding structure on the second connecting surface 112; in the case of connecting two adjacent riveted structures as shown in fig. 5, the second limiting portion 130 may extend into the first limiting portion 120 in the adjacent riveted structure to realize the limiting in the third direction (the Y-axis direction shown in fig. 5), and it should be noted that the third direction indicates a direction perpendicular to the first direction and the second direction.

It should be noted that the cross-sectional shapes of the protrusion and the recess are not limited in the embodiment of the present utility model, as long as the shapes of the first limiting portion 120 and the second limiting portion 130 are matched with each other. In other embodiments, the first limiting portion and the second limiting portion may be configured in other matching manners, for example, the first limiting portion 120 forms a protruding structure on the first connecting surface 111; the second limiting portion 130 forms a concave structure on the second connecting surface 112. Whatever form of limitation is adopted, the first limitation portion 120 and the second limitation portion 130 may be limited at least in one direction perpendicular to the first direction.

In the embodiment of the utility model, the first limiting part 120 is formed on the first connecting surface 111, the second limiting part 130 is formed on the second connecting surface 112, and the first connecting surface 111 and the second connecting surface 112 are surfaces in contact with each other in the welding process.

In some embodiments, as shown in fig. 1, the extension 110 is provided with a punch-formed rib 113, and by adding a raised structure to the extension 110, the rigidity and stability of the extension 110 can be enhanced, and the risk of deformation and breakage of the extension 110 can be reduced. The protruding rib 113 protrudes along the first direction (refer to the Z-axis direction shown in fig. 1), and the extending direction of the protruding rib 113 is perpendicular to the first direction and the second direction, and it should be noted that, the extending direction of the protruding rib 113 may be understood as the length direction of the protruding rib 113, and the extending direction of the protruding rib 113 is located in the third direction, where the third direction is the length direction of the battery cell, and under the condition that a plurality of battery cells are provided, the plurality of battery cells may be arranged along the width direction (the second direction, the X-axis direction shown in fig. 1), and the extending direction of the protruding rib 113 is perpendicular to the arrangement direction of the plurality of battery cells, which is favorable to improving the vibration absorbing and buffering capability of the extending portion 110, thereby improving the structural strength of the riveted structure.

In some embodiments, as shown in fig. 1, the riveted structure further includes a securing member disposed within the extension 110. By providing a fuse at the extension 110, the fuse may be provided as a fuse in some embodiments to increase the protection of the riveted structure. When an abnormal condition such as overcharge, overdischarge, or short circuit occurs in the battery module, a large amount of heat is generated in the battery module, and even fire or explosion may be caused. The safety part in the embodiment of the utility model can cut off the circuit by fusing the safety part when an abnormal condition occurs in the battery module, so that the current is prevented from continuing to flow, and the battery and surrounding equipment and personnel are protected from potential danger.

In some embodiments, as shown in fig. 1, the cross-section of the extension 110 is perpendicular to the second direction (referring to the X-axis direction shown in fig. 1), and the area of the cross-section of the extension 110 at the reduced diameter 114 is smaller than the area of the cross-section of the extension 110 at the non-reduced diameter, wherein the fuse is disposed at the reduced diameter 114. When abnormal conditions such as overcharge, overdischarge or short circuit occur in the battery, a large amount of heat is generated by the battery monomer, and the embodiment of the utility model has the advantages that the current density at the reduced diameter part is larger by arranging the safety part at the reduced diameter part, and under the condition of overlarge current, the safety part can be more easily influenced by the abnormal conditions in the battery, and the safety part at the reduced diameter part can be quickly fused to cut off a circuit, so that the continuous flow of the current is quickly prevented, and the danger is reduced.

In some embodiments, as shown in fig. 1 and 3, the ratio of the length L2 of the first extension 110a to the length L1 of the pole is greater than or equal to 0.6 and less than or equal to 1.4, and in some embodiments, the ratio of the length L2 of the first extension 110a to the length L1 of the pole is 1; the ratio of the length L3 of the second extension 110b to the length L1 of the pole is greater than or equal to 0.6 and less than or equal to 1.4, and in some embodiments, the ratio of the length L3 of the second extension 110b to the length L1 of the pole is 1. In some embodiments the length L2 of the first extension 110a is equal to the length L3 of the second extension 110 b. The sum of the width D2 of the first extension portion 110a, the width D3 of the second extension portion 110b, and the width D1 of the post is greater than the width of the battery cell, and the ratio of the sum of the width D2 of the first extension portion 110a, the width D3 of the second extension portion 110b, and the width D1 of the post to the width of the battery cell is greater than or equal to 1.02 and less than or equal to 1.2. The embodiment of the utility model is beneficial to ensuring the stability of the connection of the pole and the strength of the riveting structure on the premise that the welding of the pole and the riveting structure can meet the overcurrent requirement by limiting the relation between the length and the width of the extension part and the body.

The embodiment of the present utility model provides a rivet structure comprising a body 100 and at least two extensions 110, wherein the body 100 has a first surface 101 and a second surface 102 opposite to each other in a first direction, and the first surface 101 is close to a cap plate assembly 200 in a battery cell 300 opposite to the second surface 102. At least two extension parts 110 are connected at least at opposite ends of the body 100 in a second direction perpendicular to the first direction, and the extension parts 110 are used for connecting adjacent battery cells 300. The two extending portions 110 are provided with a first extending portion 110a and a second extending portion 110b, wherein the first extending portion 110a is a first connecting surface 111 at one end, far away from the body 100, in the second direction, and the second extending portion 110b is a second connecting surface 112 at one end, far away from the body 100, in the second direction, and the first connecting surface 111 is welded with the second connecting surface 112 of the adjacent battery cell 300. The riveted structure 1 further comprises a first limiting portion 120 and a second limiting portion 130. The first limiting portion 120 is located at the first extending portion 110a; the second limiting portion 130 is located at the second extending portion 110b, and the second limiting portion 130 is in limiting connection with the first limiting portion 120. The first limiting portion 120 forms a concave structure on the first connecting surface 111; the second limiting part 130 forms a protruding structure on the second connecting surface 112; or, the first limiting portion 120 forms a protruding structure on the first connecting surface 111; the second limiting portion 130 forms a concave structure on the second connecting surface 112. The extending portion 110 is provided with a protruding rib formed by stamping, and the extending direction of the protruding rib is perpendicular to the first direction and the second direction. The riveted structure 1 further comprises a securing member arranged within said extension 110. The cross section of the extension 110 is perpendicular to the second direction, and the cross section of the extension 110 at the reduced diameter is smaller than the cross section at the non-reduced diameter, wherein the safety element is disposed at the reduced diameter 114.

The embodiment of the utility model further provides a cover plate assembly 200, as shown in fig. 2-4, the cover plate assembly 200 includes a top cover 201, a first insulating member 202, a second insulating member 203, a pole 204, and the riveting structure 1 according to any of the above embodiments. Wherein the top cap 201 is provided with mounting holes, as shown in fig. 5, the top cap 201 serves to seal the top of the battery cell 300. The first insulator 202 is provided on the top of the top cover 201; the second insulator 203 is provided at the bottom of the top cover 201, wherein the top portion represents an upper portion in the first direction, the bottom portion represents a lower portion in the first direction, and the first direction is represented by the Z-axis direction shown in fig. 5. The first insulating member 202 and the second insulating member 203 may be made of plastic materials, and the second insulating member 203 is used for sealing the top of the battery cell, so as to prevent the electrolyte inside the battery cell from leaking, thereby improving the safety and stability of the battery cell. The first insulating member 202 and the second insulating member 203 also have good insulating properties, which is beneficial to reducing the risk of short circuit between the positive electrode and the negative electrode inside the battery. The first insulating member 202 can provide a certain protection effect, so as to reduce the risk of external objects entering the battery cell, and reduce the risk of the battery cell being affected by the external environment.

Referring to fig. 1 to 5, the pole 204 at least partially penetrates the second insulating member 203 and extends into the mounting hole, the rivet structure 1 is disposed on a side of the first insulating member 202 away from the top cover 201, the body 100 is connected to the pole 204, and the extension 110 is disposed to protrude from the top cover 201 in the second direction (refer to the X-axis direction shown in fig. 1). According to the embodiment of the utility model, the riveting structure is arranged as the body and the extension part connected with one end of the body in the second direction, the body is used for connecting the cover plate component of the battery monomer, the extension part is used for connecting the cover plate component of the adjacent battery monomer, the body and the extension part are arranged in a staggered manner in the second direction, and in the process of connecting the extension part and the adjacent battery monomer, heat generated in the welding process is far away from the polar post and the cover plate component of the battery monomer, so that risks such as softening plastic and the like by heat input in the welding process are reduced, the influence of the cover body component on the air tightness of the battery monomer is reduced, the risk of damage to the polar post is reduced, the reliability of the connection of the polar post is improved, and the welding position of the extension part and the adjacent battery monomer is far away from the polar post, so that the arrangement of the thickness of the polar post is less influenced by the limitation of overcurrent, and the arrangement height of the polar post is reduced; and the extension part is far away from the pole with adjacent battery monomer welded position, is favorable to reducing the effort of welding position to the pole at battery impact vibration's in-process to reduce the risk to the pole damage, with further structural strength and the reliability of connection that improves the pole.

The embodiment of the present utility model further provides a battery cell 300, as shown in fig. 5, which includes the cover plate assembly 200 according to any of the above embodiments.

The embodiment of the utility model also provides a battery module, as shown in fig. 5, including the battery cell 300 according to any of the above embodiments.

The embodiment of the utility model also provides electric equipment, which comprises the battery module.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and they should be construed as falling within the scope of the present utility model. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions.

Claims (11)

1. A riveted structure, comprising:

The battery cell comprises a body, a first cover plate and a second cover plate, wherein the body is provided with a first surface and a second surface which are opposite in a first direction, and the first surface is close to the cover plate assembly in the battery cell relative to the second surface;

The two extension parts are connected to two opposite ends of the body in a second direction, the second direction is perpendicular to the first direction, and the body and the extension parts are arranged in a staggered manner in the second direction; the extension is used for connecting adjacent battery cells.

2. The riveted structure of claim 1, wherein the extensions are a first extension and a second extension, respectively, wherein the first extension has a first connection surface at an end thereof remote from the body in the second direction, and the second extension has a second connection surface at an end thereof remote from the body in the second direction, and the first connection surface is welded with the second connection surface of the adjacent battery cell.

3. The riveted structure of claim 2, further comprising:

the first limiting part is positioned on the first extending part;

The second limiting part is positioned on the second extending part and is in limiting connection with the first limiting part.

4. The caulking structure of claim 3, wherein said first stopper forms a recessed structure at said first connection surface; the second limiting part forms a convex structure on the second connecting surface; or, the first limiting part forms a protruding structure on the first connecting surface; the second limiting part forms a concave structure on the second connecting surface.

5. The caulking structure of claim 1, wherein said extension portion is provided with a punch-formed bead, an extension direction of said bead being perpendicular to said first direction and said second direction.

6. The riveted structure of claim 1, further comprising:

And the safety piece is arranged in the extension part.

7. The riveted structure of claim 6, wherein a cross-section of the extension is perpendicular to the second direction, a cross-sectional area of the extension at the reduced diameter is smaller than a cross-sectional area at the non-reduced diameter, wherein the fuse is disposed at the reduced diameter.

8. A cover plate assembly, comprising:

The top cover is provided with a mounting hole;

The first insulating piece is arranged on the top of the top cover;

the second insulating piece is arranged at the bottom of the top cover;

a post at least partially passing through the second insulator and extending into the mounting hole;

The riveted structure of any one of claims 1-7, disposed on a side of the first insulator remote from the top cover, the body being connected with the pole.

9. A battery cell comprising the cap assembly of claim 8.

10. A battery module comprising the battery cell according to claim 9.

11. A powered device comprising the battery module according to claim 10.