CN220774587U - Protection plate assembly, battery and electricity utilization device - Google Patents

Abstract

The embodiment of the application provides a protection plate assembly, a battery and an electric device. The protection plate assembly comprises a protection plate, wherein the protection plate is provided with an exhaust hole; a bottom guard board; foam is arranged between the protection plate and the bottom protection plate, and the vent hole is not covered by orthographic projection of the foam on the plane where the surface of the protection plate is located. According to the technical scheme, the reliability of the battery can be improved.

Description

Protection plate assembly, battery and electricity utilization device

Technical Field

The application relates to the technical field of batteries, in particular to a protection plate assembly, a battery and an electric device.

Background

In the new energy industry, battery technology is an important factor in its development.

The development of battery technology requires consideration of various design factors such as energy density, cycle life, reliability, and the like. The protection plate assembly in the battery is critical to the reliability of the battery. Therefore, how to provide a protection board assembly to improve the reliability of the battery is a technical problem to be solved.

Disclosure of Invention

The embodiment of the application provides a protection plate assembly, a battery and an electricity utilization device, and the reliability of the battery can be improved.

In a first aspect, there is provided a battery protection plate assembly for a battery, comprising: the protection plate is provided with an exhaust hole; a bottom guard board; foam is arranged between the protection plate and the bottom protection plate, and orthographic projection of the foam on a plane where the surface of the protection plate is positioned does not cover the exhaust hole.

The embodiment of the application provides a guard plate assembly, including guard plate, end backplate and set up the bubble cotton between guard plate and end backplate. The foam is arranged between the protection plate and the bottom protection plate, and can fill gaps between the protection plate and the bottom protection plate, so that when the bottom protection plate is impacted by larger external force, the foam can absorb part of the external force, and meanwhile, the foam can also transfer part of the external force received by the bottom protection plate to the protection plate. Thus, the external force applied to the bottom guard plate is distributed on the foam and the guard plate, so that the risk that the bottom guard plate is singly subjected to larger external force impact and damaged can be reduced. Therefore, under the working conditions of bottom scraping, ball striking and the like, the risk of damaging the bottom guard plate can be reduced, and meanwhile, the battery can be protected by the guard plate assembly, so that the reliability of the battery can be improved.

In one possible implementation, an adhesive is provided on a surface of at least one side of the foam, and the foam is connected with the protection plate and/or the bottom protection plate through the adhesive.

Foam is connected with the protection plate and/or the bottom protection plate through an adhesive to fix the position of the foam, reduce the displacement of the foam between the protection plate and the bottom protection plate and cover the risk of the exhaust hole.

In one possible implementation, the surface of both sides of the foam is provided with the adhesive.

The surface of cotton both sides of bubble all is provided with the adhesive, and the cotton simultaneously is connected with guard plate and end backplate, can promote the wholeness of guard plate subassembly like this to promote the holistic structural strength of guard plate subassembly.

In one possible implementation, the adhesive is a structural adhesive.

The structural adhesive has the advantages of high strength, stripping resistance, impact resistance, simple construction process, uniform stress distribution of the joint surface and the like, and is beneficial to improving the stability of the foam fixed connection.

In a possible implementation manner, the protection plate is provided with a plurality of exhaust hole rows, the exhaust hole rows comprise a plurality of exhaust holes arranged along a first direction, and the exhaust hole rows are arranged along a second direction, and the second direction is perpendicular to the first direction; the foam is arranged between two adjacent exhaust hole rows.

The foam is arranged between two adjacent exhaust hole rows and is arranged in a staggered manner with the exhaust holes, so that the exhaust holes are not covered and the exhaust effect of the exhaust holes is not affected.

In one possible implementation, one of the foam is disposed between two adjacent rows of the exhaust holes, and the foam extends in the first direction.

A foam extending along the first direction is arranged between the two exhaust hole rows, so that the processing operation is easy.

In one possible implementation manner, a plurality of foam is arranged between two adjacent exhaust hole rows, and the foam is arranged at intervals along the first direction.

A plurality of foam cotton arranged at intervals along the first direction are arranged between two adjacent exhaust hole rows, so that the space between the protection plate occupied by the foam cotton and the bottom protection plate can be reduced, and the space for exhausting the exhaust holes is increased.

In one possible implementation, the distance between two adjacent foam pieces ranges from 150mm to 200mm.

In one possible implementation, the distance between two adjacent foam pieces ranges from 180mm to 200mm.

The interval between two adjacent foam is set in the range, and the space between the protection plate and the bottom protection plate occupied by the foam is reduced, so that enough foam is arranged between the protection plate and the bottom protection plate to fill part of the gap between the protection plate and the bottom protection plate.

In one possible implementation, the thickness of the foam ranges from 0.2mm to 0.5mm.

In one possible implementation, the thickness of the foam ranges from 0.2mm to 0.35mm.

The thickness of the foam is set in the range, so that the foam is favorable for filling gaps between the protection plate and the bottom protection plate.

In one possible implementation, the foam is rectangular in shape. The foam is cuboid, is convenient to process and is easy to arrange between the exhaust hole rows.

In one possible implementation, the end of the protection plate is provided with a side beam, and the end of the bottom protection plate is fixedly connected with the side beam.

The end of the bottom guard plate is fixedly connected with the edge beam of the end of the guard plate so as to improve the overall structural strength of the guard plate assembly.

In one possible implementation, the end of the bottom guard plate is provided with a fastener, and the end of the bottom guard plate is fixedly connected with the side beam through the fastener.

In one possible implementation, the fastener is a bolt. The bolt has high load capacity and can bear larger stretching and shearing force, so that the protection plate and the bottom protection plate can be stably and fixedly connected, and the bolt has the advantages of simple structure, convenient installation and strong detachability, and can simplify the assembly process.

In a second aspect, there is provided a battery comprising the guard plate assembly of the first aspect and any one of the possible implementations thereof; and the battery monomer is arranged on the protection plate of the protection plate assembly.

In one possible implementation, the battery cell includes a pressure relief mechanism disposed opposite the vent hole of the protective plate.

The pressure release mechanism of the battery monomer is arranged opposite to the exhaust hole, so that the excrement in the battery monomer is discharged through the exhaust hole after the pressure release mechanism is damaged, and the risk of thermal runaway diffusion of the battery is reduced.

In a third aspect, there is provided an electrical device comprising the battery of the second aspect and any one of the possible implementations thereof.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and that other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a fender assembly according to an embodiment of the present application;

FIG. 2 is a schematic view of a fender assembly according to an embodiment of the present application;

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

fig. 4 is a schematic structural view of a battery according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a battery cell according to an embodiment of the present application;

fig. 6 is a schematic view of a vehicle as an electric device according to an embodiment of the present application.

In the drawings, the drawings are not drawn to scale.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the present application and are not intended to limit the scope of the application, i.e., the application is not limited to the embodiments described.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like indicate an orientation or positional relationship merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.

The directional terms appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the present application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the present application can be understood as appropriate by one of ordinary skill in the art.

The term "and/or" in this application is merely an association relation describing an associated object, and indicates that three relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this application, the character "/" generally indicates that the associated object is an or relationship.

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 application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification 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 application. 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 understand that the embodiments described herein may be combined with other embodiments.

In the embodiment of the present application, the battery cell may include a lithium ion battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited thereto. The battery cells may be cylindrical, flat, rectangular, or otherwise shaped, as well as the embodiments herein are not limited in this regard. The battery cells are generally classified into three types according to the packaging method: the cylindrical battery cell, the square battery cell and the soft package battery cell are not limited thereto.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, or the like. The battery generally includes a case for enclosing one or more battery cells. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

To meet different power demands, a battery may include a plurality of battery cells, where the plurality of battery cells may be connected in series or parallel or a series-parallel connection, which refers to a mixture of series and parallel. Optionally, the plurality of battery cells may be connected in series or parallel or in series-parallel to form a battery module, and then the plurality of battery modules are connected in series or parallel or in series-parallel to form a battery. That is, a plurality of battery cells may be directly assembled into a battery, or may be assembled into a battery module first, and the battery module may be assembled into a battery. The battery is further arranged in the electricity utilization device to provide electric energy for the electricity utilization device.

In the new energy industry, battery technology is an important factor in its development. The development of battery technology requires consideration of various design factors such as energy density, cycle life, reliability, and the like.

The protective action of the protective plate assembly in the battery is critical to the reliability of the battery. The protection plate component in the battery mainly comprises a bottom plate at the bottom and a support plate for supporting the battery monomer, the support plate is provided with vent holes corresponding to the pressure release mechanism of the battery monomer, gas in the battery monomer passes through the vent holes to be discharged through the pressure release mechanism, a closed space for the vent holes to discharge is formed between the bottom plate and the support plate, and the bottom plate and the support plate are only connected and fixed at the end parts for ensuring tightness, and a fixing structure is not arranged in the middle of the plate, so that the bottom plate is prevented from leaking. Under the condition, other areas except the end parts of the bottom plate and the supporting plate are not connected, gaps exist between the bottom plate and the supporting plate, when the bottom plate meets working conditions such as scraping and even ball striking, deformation and even cracking are often caused, the protection effect of the bottom plate on battery monomers and other parts inside the battery is lost, and the reliability of the battery is affected.

Based on this, the application provides a guard plate assembly, including guard plate, end guard plate and set up the bubble cotton between guard plate and end guard plate. The foam is arranged between the protection plate and the bottom protection plate, and can fill gaps between the protection plate and the bottom protection plate, so that when the bottom protection plate is impacted by larger external force, the foam can absorb part of the external force, and meanwhile, the foam can also transfer part of the external force received by the bottom protection plate to the protection plate. Thus, the external force applied to the bottom guard plate is distributed on the foam and the guard plate, so that the risk that the bottom guard plate is singly subjected to larger external force impact and damaged can be reduced. Therefore, under the working conditions of bottom scraping, ball striking and the like, the risk of damaging the bottom guard plate can be reduced, and meanwhile, the battery can be protected by the guard plate assembly, so that the reliability of the battery can be improved.

Fig. 1 is a schematic structural view of a fender assembly according to an embodiment of the present application. In one embodiment of the present application, as shown in FIG. 1, the fender assembly 30 includes a fender 31, a bottom fender 32, and foam 33.

Specifically, the protection plate 31 is provided with an exhaust hole 311, for example, in a battery, a battery cell is placed on the protection plate 31, a pressure release mechanism of the battery cell is correspondingly arranged with the exhaust hole 311, and when the internal air pressure or temperature of the battery cell is too high, the pressure release mechanism is opened, and the air in the battery cell is exhausted through the exhaust hole 311.

The foam 33 is disposed between the protection plate 31 and the bottom protection plate 32, and the vent hole 311 is not covered by the orthographic projection of the foam 33 on the plane of the surface of the protection plate 31. The foam 33 is disposed between the guard plate 31 and the bottom guard plate 32 to fill a gap therebetween, so that when the bottom guard plate 32 is impacted by a large external force, the foam 33 can absorb a part of the external force, and at the same time, the foam 33 can transmit a part of the external force received by the bottom guard plate 32 to the guard plate 31. The front projection of the foam 33 on the plane of the surface of the protection plate 31 does not cover the vent hole 311, that is, the foam 33 does not cover the vent hole 311, thereby avoiding affecting the venting function of the vent hole 311.

The embodiment of the application provides a guard plate assembly 30, which comprises a guard plate 31, a bottom guard plate 32 and foam 33 arranged between the guard plate 31 and the bottom guard plate 32. The foam 33 is disposed between the guard plate 31 and the bottom guard plate 32, and can fill the gap between the guard plate 31 and the bottom guard plate 32, so that when the bottom guard plate 32 is impacted by a large external force, the foam 33 can absorb a part of the external force, and at the same time, the foam 33 can also transmit a part of the external force received by the bottom guard plate 32 to the guard plate 31. Thus, the external force applied to the bottom guard plate 32 is distributed to the foam 33 and the guard plate 31, so that the risk that the bottom guard plate 32 receives larger external force impact alone and is damaged can be reduced. Therefore, under the working conditions of bottom scraping, ball striking and the like, the risk of damaging the bottom guard plate 32 can be reduced, and meanwhile, the battery can be protected by the guard plate assembly, so that the reliability of the battery can be improved.

In some embodiments, at least one side surface of the foam 33 is provided with an adhesive, and the foam 33 is attached to the guard plate 31 and/or the bottom guard plate 32 by the adhesive.

The foam 33 is attached to the guard plate 31 and/or the bottom guard plate 32 by an adhesive to fix the position of the foam 33, reducing the risk of the foam 33 being displaced between the guard plate 31 and the bottom guard plate 32, covering the vent hole 311.

In some embodiments, the surfaces of both sides of foam 33 are provided with adhesive.

The surfaces of the two sides of the foam 33 are respectively provided with an adhesive, and the foam 33 is simultaneously connected with the protection plate 31 and the bottom protection plate 32, so that the integrity of the protection plate assembly can be improved, and the overall structural strength of the protection plate assembly is improved.

Optionally, in some embodiments, the adhesive is a structural adhesive.

The structural adhesive has the advantages of high strength, stripping resistance, impact resistance, simple construction process, uniform stress distribution of the joint surface and the like, and is beneficial to improving the stability of the fixed connection of the foam 33.

It should be understood that the structural adhesive is an exemplary illustration of an adhesive in embodiments of the present application, which may include structural adhesive, but is not limited to structural adhesive, for example, and may include double sided adhesive.

In some embodiments, as shown in fig. 1, the shielding plate 31 is provided with a plurality of vent hole rows including a plurality of vent holes 311 aligned in a first direction (e.g., x-direction in fig. 1), the plurality of vent hole rows being aligned in a second direction (e.g., y-direction in fig. 1), the second direction being perpendicular to the first direction; foam 33 is disposed between two adjacent rows of vent holes.

Alternatively, the first direction is the length direction of the foam 33, and the second direction is the width direction of the foam 33.

In the battery, a plurality of battery cells are arranged in a battery cell row along a first direction, and then the plurality of battery cell rows are arranged in a second direction. Therefore, the protection plate 31 is provided with a plurality of vent holes 311 corresponding to the pressure release mechanisms of the plurality of battery cells one by one.

Correspondingly, the foam 33 is arranged between two adjacent exhaust hole rows and is arranged in a staggered manner with the exhaust hole 311, so that the exhaust hole 311 is not covered and the exhaust effect of the exhaust hole 311 is not affected.

Optionally, in some embodiments, with continued reference to fig. 1, a foam 33 is disposed between two adjacent rows of vent holes, the foam 33 extending in the first direction.

A foam 33 extending along the first direction is arranged between the two exhaust hole rows, so that the processing operation is easy.

Optionally, in some embodiments, as shown in fig. 2, a plurality of foam pieces 33 are disposed between two adjacent vent hole rows, and the plurality of foam pieces 33 are arranged at intervals along the first direction.

A plurality of foam pieces 33 are arranged between two adjacent vent hole rows at intervals along the first direction, so that the space between the protection plate 31 and the bottom protection plate 32 occupied by the foam pieces 33 can be reduced, and the space for venting the vent holes 311 is increased.

In some embodiments, as shown in FIG. 3, the spacing L between two adjacent foam pieces 33 can range from 150mm to 200mm, alternatively L can range from 180mm to 200mm.

Specifically, in the first direction x, the distance L between two adjacent foam pieces 33 may be 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, or a value between any two of the above.

The interval between two adjacent foam pieces 33 is set within the above range, so that there is enough foam piece 33 between the protection plate 31 and the bottom protection plate 32 to fill part of the gap between them while reducing the space between the protection plate 31 and the bottom protection plate 32 occupied by the foam piece 33.

In some embodiments, as shown in FIG. 3, the thickness d of foam 33 may range from 0.2mm to 0.5mm, alternatively d may range from 0.2mm to 0.35mm.

Specifically, the thickness d of the foam 33 may be 0.2mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, or a value between any two of the above.

It should be appreciated that the thickness of foam 33 is set in relation to the spacing between guard plate 31 and bottom guard plate 32. The thickness of the foam 33 used can be adjusted according to the distance between the guard plate 31 and the bottom guard plate 32 in the actual product.

The thickness of the foam 33 in the embodiment of the application can be measured by a micrometer, the thickness of a plurality of different positions of the foam 33 is measured by the micrometer, and the average value of the measured results is recorded as the final thickness. The spacing between adjacent foam 33 may be measured by a tape measure.

Alternatively, in some embodiments, as shown in fig. 1 and 2, the foam 33 is rectangular in shape. Foam 33 is rectangular and is easy to process and to arrange between the rows of exhaust holes.

It should be understood that the shape of the foam 33 is a cuboid, which is an exemplary illustration of the shape of the foam 33 in the embodiment of the present application, and the shape of the foam 33 may be a cuboid, but is not limited to a cuboid, for example, the shape of the foam 33 may be a cylinder. It should be understood that when the foam 33 is a cylinder, the interval between two adjacent foam 33 in the first direction x is the interval between two positions closest to the two foam 33.

In some embodiments, as shown in fig. 1 and 2, the end of the guard plate 31 is provided with a side rail 312, and the end of the bottom guard plate 32 is fixedly connected to the side rail 312. To improve the overall structural strength of the fender assembly.

In some embodiments, the end of the bottom guard plate 32 is provided with fasteners 321, and the end of the bottom guard plate 32 is fixedly connected to the side rail 312 by the fasteners 321.

Optionally, in some embodiments, the fastener 321 is a bolt. The bolt has high load capacity and can bear larger stretching and shearing force, so that the protection plate 31 and the bottom protection plate 32 can be stably and fixedly connected, and the bolt has simple structure, convenient installation and strong detachability, and can simplify the assembly process.

It should be appreciated that the bolt is one exemplary illustration of the fastener 321 in the embodiments of the present application, and the fastener 321 may be a bolt, but is not limited to a bolt, such as a rivet.

Alternatively, in some embodiments, the material of the bottom guard plate 32 is a metallic material or a fiber reinforced composite material. The metal material or the fiber reinforced composite material has strong deformation resistance, so that the possibility of deformation of the structure of the bottom guard plate 32 can be reduced under the working conditions of large impact such as bottom scraping, ball striking and the like, and the protection capability of the guard plate assembly 30 can be improved.

Optionally, in some embodiments, the material of the shield plate 31 is a high temperature resistant material.

Embodiments of the present application also provide a battery 10, as shown in fig. 4, including a fender assembly 30 of any of the embodiments described above.

To meet different power usage requirements, the battery 10 may include a plurality of battery cells 20. As shown in fig. 4, the battery 10 includes a plurality of battery cells 20.

Alternatively, the battery cells 20 may be disposed on the shielding plate 31 of the shielding plate assembly 30, and the shielding plate 31 plays a role of supporting the battery cells 20.

Alternatively, the battery 10 may further include a case 11, the case 11 may have a ring-shaped structure, for example, a rectangular structure, and the shielding plate assembly 30 may cover the case 11 to restrain the battery cells 20 inside the case 11. For example, a plurality of battery cells 20 are connected in parallel or in series-parallel combination with each other and then placed in the case 11.

Optionally, the battery 10 includes a thermal management component for regulating the temperature of the battery cells 20. Wherein the thermal management member may be disposed between the battery cells 20 and the sheathing assembly 30, or may be disposed between adjacent two battery cells 20.

Optionally, the battery 10 further includes a cross member disposed inside the case of the battery 10 for enhancing the structural strength of the battery 10.

Alternatively, the battery 10 may further include other structures, which are not described in detail herein. For example, the battery 10 may further include a bus member for making electrical connection between the plurality of battery cells 20, such as parallel or series-parallel connection. Specifically, the bus member may realize electrical connection between the battery cells 20 by connecting electrode terminals of the battery cells 20. Further, the bus member may be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of the plurality of battery cells 20 may be further drawn through the housing by a conductive mechanism. Alternatively, the conductive means may also belong to the bus bar member.

As shown in fig. 5, a schematic structural diagram of a battery cell 20 according to an embodiment of the present application, the battery cell 20 includes one or more electrode assemblies 22, a case 211, and a cover 212. The housing 211 and the cover 212 form a case or battery compartment 21. The wall of the case 211 and the cover plate 212 are referred to as the wall of the battery cell 20, wherein for a rectangular parallelepiped type battery cell 20, the wall of the case 211 includes a bottom wall and four side walls. The case 211 is determined according to the shape of the combined one or more electrode assemblies 22, for example, the case 211 may be a hollow rectangular parallelepiped or square or cylindrical body, and one face of the case 211 has an opening so that one or more electrode assemblies 22 may be placed in the case 211. For example, when the housing 211 is a hollow rectangular parallelepiped or square, one of the planes of the housing 211 is an opening surface, i.e., the plane has no wall body so that the inside and outside of the housing 211 communicate. When the housing 211 may be a hollow cylinder, the end surface of the housing 211 is an open surface, i.e., the end surface has no wall body so that the inside and outside of the housing 211 communicate. The cap plate 212 covers the opening and is connected with the case 211 to form a closed cavity in which the electrode assembly 22 is placed. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

In the battery cell 20, the electrode assemblies 22 may be provided in a single unit, or in a plurality, according to actual use requirements, as shown in fig. 5, and 4 individual electrode assemblies 22 are provided in the battery cell 20.

A pressure release mechanism 213 may also be provided on the battery cell 20. The pressure release mechanism 213 is used to actuate to release the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature reaches a threshold.

The pressure relief mechanism 213 may be any of a variety of possible pressure relief structures, and embodiments of the present application are not limited in this regard. For example, the pressure release mechanism 213 may be a temperature-sensitive pressure release mechanism configured to be able to melt when the internal temperature of the battery cell 20 provided with the pressure release mechanism 213 reaches a threshold value; and/or the pressure relief mechanism 213 may be a pressure sensitive pressure relief mechanism configured to rupture when the internal air pressure of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value.

In the embodiment of the present application, the pressure release mechanism 213 is disposed on the cover 212 as an exemplary description, alternatively, the pressure release mechanism 213 may be disposed on any side wall of the battery cell 20, for example, the pressure release mechanism 213 may be disposed on the bottom wall of the battery cell 20, that is, the bottom wall of the housing 211.

In some embodiments, the pressure relief mechanism 213 is disposed opposite the vent hole 311 of the shield plate 31.

This is advantageous in that the relief mechanism 213 is broken, and then the excrement in the battery cell 20 is discharged through the vent hole 311, thereby reducing the risk of thermal runaway diffusion of the battery 10.

Fig. 6 is a schematic view of a vehicle as an electric device according to an embodiment of the present application. As shown in fig. 6, the electricity consumption device includes a battery 10, and the battery 10 is used to supply power to the electricity consumption device.

For example, as shown in fig. 6, the electric device is a vehicle 1, the vehicle 1 may be a fuel-oil vehicle, a gas-oil vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended range vehicle. The motor 60, the controller 61, and the battery 10 may be provided inside the vehicle 1, and the controller 61 is configured to control the battery 10 to supply power to the motor 60. For example, the battery 10 may be provided at the bottom or the head or the tail of the vehicle 1. The battery 10 may be used for power supply of the vehicle 1, e.g. the battery 10 may be used as an operating power source for the vehicle 1, for electrical circuitry of the vehicle 1, e.g. for start-up, navigation and operational power requirements of the vehicle 1. In another embodiment of the present application, the battery 10 may not only serve as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, instead of or in part instead of fuel oil or natural gas, to provide driving power for the vehicle 1.

The electric device may be various devices using a battery, for example, a mobile phone, a portable device, a notebook computer, an electric car, an electric toy, an electric tool, an electric vehicle, a ship, a spacecraft, etc., for example, a spacecraft including an airplane, a rocket, a space shuttle, a spacecraft, etc.

While the present application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the present application. 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 application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (18)

1. A fender assembly, comprising:

a protection plate (31), wherein the protection plate (31) is provided with an exhaust hole (311);

a bottom guard plate (32);

foam (33) is arranged between the protection plate (31) and the bottom protection plate (32), and the vent hole (311) is not covered by orthographic projection of the foam (33) on the plane where the surface of the protection plate (31) is located.

2. The shielding plate assembly according to claim 1, characterized in that the surface of at least one side of the foam (33) is provided with an adhesive, by means of which the foam (33) is connected with the shielding plate (31) and/or the bottom shielding plate (32).

3. A fender assembly according to claim 2, wherein the surface of both sides of the foam (33) is provided with the adhesive.

4. The fender assembly of claim 2, wherein the adhesive is a structural adhesive.

5. The fender assembly of claim 1, wherein the fender panel (31) is provided with a plurality of vent hole rows including a plurality of the vent holes (311) aligned in a first direction, the plurality of vent hole rows being aligned in a second direction, the second direction being perpendicular to the first direction;

the foam (33) is arranged between two adjacent exhaust hole rows.

6. The fender assembly of claim 5, wherein one of the foam (33) is disposed between two adjacent rows of the vent holes, the foam (33) extending in the first direction.

7. The fender assembly of claim 5, wherein a plurality of the foam pieces (33) are disposed between two adjacent rows of the exhaust holes, the plurality of foam pieces (33) being arranged at intervals along the first direction.

8. A fender assembly as claimed in claim 7, wherein the spacing between adjacent ones of the foam elements (33) is in the range 150mm to 200mm.

9. A fender assembly as claimed in claim 8, wherein the spacing between adjacent ones of the foam elements (33) is in the range 180mm to 200mm.

10. A fender assembly as claimed in claim 1, wherein the foam (33) has a thickness in the range of 0.2mm to 0.5mm.

11. The fender assembly of claim 10, wherein the foam (33) has a thickness in the range of 0.2mm to 0.35mm.

12. The fender assembly of claim 1, wherein the foam (33) is rectangular in shape.

13. The fender assembly of any one of claims 1 to 12, wherein an end of the fender (31) is provided with a rim beam (312), and an end of the bottom fender (32) is fixedly connected to the rim beam (312).

14. The fender assembly of claim 13, wherein the end of the bottom fender (32) is provided with a fastener (321), the end of the bottom fender (32) being fixedly connected to the edge beam (312) by the fastener (321).

15. The fender assembly of claim 14, wherein the fastener (321) is a bolt.

16. A battery, comprising:

a fender assembly as claimed in any one of claims 1 to 15;

and the battery unit (20) is arranged on the protection plate (31) of the protection plate assembly.

17. The battery according to claim 16, wherein the battery cell (20) includes a pressure relief mechanism (213), the pressure relief mechanism (213) being disposed opposite the vent hole (311) of the protection plate (31).

18. An electrical device comprising a battery as claimed in claim 16 or 17.