CN221407462U - Heat insulation structure, battery and electric equipment - Google Patents

Abstract

The application relates to a heat insulation structure, a battery and electric equipment, wherein the heat insulation structure comprises a supporting piece, heat insulation layers and air guide layers, the supporting piece forms a supporting space, the heat insulation layers are arranged in the supporting space and are connected with the supporting piece, the heat insulation layers comprise a plurality of layers, all the heat insulation layers are arranged at intervals along a set direction, and the air guide layers are arranged between at least two heat insulation layers which are arranged at intervals. Therefore, by additionally arranging the air guide layer, the heat insulation effect of the heat insulation structure is greatly enhanced under the condition that the thickness of the heat insulation layer is not required to be too thick, and the heat insulation effect is enhanced while the thickness and the volume of the heat insulation structure are reduced.

Description

Heat insulation structure, battery and electric equipment

Technical Field

The application relates to the technical field of batteries, in particular to a heat insulation structure, a battery and electric equipment.

Background

Energy conservation and emission reduction are key to sustainable development of the automobile industry, and electric vehicles become an important component of sustainable development of the automobile industry due to the energy conservation and environmental protection advantages of the electric vehicles. For electric vehicles, battery technology is an important factor in the development of the electric vehicles.

With the increasing awareness of battery safety, thermal runaway problems of batteries are receiving a great deal of attention, and in order to solve this problem, a heat insulating pad is generally provided between battery cells to reduce the risk of thermal diffusion.

However, the heat insulation effect of a general heat insulation pad is not good, and the heat insulation effect is only improved by continuously thickening the heat insulation pad, the volume is sacrificed to improve the heat insulation, and the volume and the heat insulation effect cannot be simultaneously achieved.

Disclosure of utility model

Based on this, it is necessary to provide a heat insulation structure, a battery and electric equipment, which can reduce the volume of the heat insulation structure and enhance the heat insulation effect of the heat insulation structure.

In a first aspect, the application provides a heat insulation structure, which comprises a support member, a heat insulation layer and an air guide layer, wherein the support member forms a support space, the heat insulation layer is arranged in the support space and is connected with the support member, the heat insulation layer comprises a plurality of layers, all the heat insulation layers are distributed along a set direction, at least two heat insulation layers are arranged at intervals, and the air guide layer is arranged between the heat insulation layers.

According to the technical scheme provided by the embodiment of the application, the air guide layer is additionally arranged, so that the heat insulation effect of the heat insulation structure is greatly enhanced under the condition that the thickness of the heat insulation layer is not required to be excessively thick, and the heat insulation effect is enhanced while the thickness and the volume of the heat insulation structure are reduced.

In some embodiments, all the heat insulation layers are arranged at intervals along the set direction, and an air guide layer is arranged between every two heat insulation layers.

According to the technical scheme provided by the embodiment of the application, the risk that adjacent battery monomers reach thermal runaway due to thermal diffusion is effectively reduced.

In some embodiments, the heat insulation structure comprises an air guide groove, wherein the air guide groove is communicated with the air guide layer and the atmosphere, and the air guide groove is arranged on the support piece and/or the heat insulation layer along a set direction.

According to the technical scheme provided by the embodiment of the application, when the air in the air guide layer is heated, the hot air is convected with the outside air through the air guide groove, so that heat is consumed. The air guide groove can increase the convection speed of the air guide layer and the outside air, so that the heat insulation effect is enhanced.

In some embodiments, the support member is disposed on at least one side of the insulating layer along a first direction, and the air guide groove is disposed on the support member, wherein the first direction intersects the set direction.

According to the technical scheme provided by the embodiment of the application, the air current layer performs heat convection from the upper part of the battery cell, so that the heat convection effect is better, and the air current layer is not influenced by other structures in the battery or other battery cells.

In some embodiments, the support comprises a first support portion and a second support portion; the first supporting part and the second supporting part are arranged at the opposite ends of all the heat insulation layers along the first direction and are connected with each heat insulation layer; the first supporting part and/or the second supporting part is/are provided with an air guide groove.

In the technical scheme of the embodiment of the application, in order to ensure the heat convection effect of the air guide layer, an air guide groove can be arranged on one of the first support part and the second support part, which is close to the end cover. Or the air guide grooves can be arranged on the two parts, so that the assembly freedom is realized, and an operator can freely reverse the assembly positions of the first supporting part and the second supporting part.

In some embodiments, the ratio of the thickness of each insulating layer to the thickness of each air guiding layer ranges from 1 to 2.

According to the technical scheme provided by the embodiment of the application, the thickness of the heat insulation layer and the thickness of the air guide layer are limited in a closed range, so that the heat insulation effect can be provided to the greatest extent in one direction, and the whole thickness of the heat insulation structure can be in a proper range.

In some embodiments, the heat insulation structure further comprises a glue layer, and at least one of the two heat insulation layers located at the outermost side in the set direction forms a pasting surface facing away from the other heat insulation layer. Each adhesive surface is provided with an adhesive layer.

According to the technical scheme provided by the embodiment of the application, the heat insulation structure can be attached and adhered to the battery monomers at two sides through the adhesive layer.

In some embodiments, the insulation structure further comprises a bracket disposed within the air guiding layer and connected to at least one of the two insulation layers on both sides.

According to the technical scheme provided by the embodiment of the application, the support is arranged to ensure that the heat insulation layer can deform after the battery oscillates so as to resist the vibration and enhance the safety coefficient. Simultaneously, the setting of support can avoid the air current layer to be by the condition of unlimited compression to guarantee thermal-insulated effect.

In a second aspect, the present application provides a battery, including a plurality of battery cells stacked along a set direction and the heat insulation structure of any one of the foregoing embodiments, where the heat insulation structure is disposed between at least two adjacent battery cells.

In some embodiments, the battery cell has an end cap provided with an electrode terminal, at least a portion of the support is disposed on a side near the end cap, the thermal insulation structure includes an air guide groove disposed on a portion of the support near the end cap, and the air guide groove is in communication with the air guide layer.

According to the technical scheme provided by the embodiment of the application, the air guide groove is arranged on the part, close to the end cover, of the support piece, so that the heat convection effect of the air guide layer is ensured.

In a third aspect, the present application provides a powered device, including a battery in the foregoing embodiment, where the battery is configured to provide electrical energy.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

FIG. 1 is a schematic illustration of a vehicle provided in accordance with one or more embodiments;

FIG. 2 is an exploded view of a structure of a battery provided in accordance with one or more embodiments;

FIG. 3 is a schematic view of a partial structure of a battery provided in accordance with one or more embodiments;

FIG. 4 is a plan view block diagram of an insulation structure according to one or more embodiments of the present application;

FIG. 5 is a perspective block diagram of an insulation structure according to one or more embodiments of the present disclosure;

FIG. 6 is a perspective view of another embodiment of an insulating structure according to one or more embodiments of the present application;

FIG. 7 is a block diagram of a bracket of an insulating structure according to one or more embodiments of the present application;

FIG. 8 is a perspective view of a thermal insulation structure according to one or more embodiments of the present application mated with a battery cell;

fig. 9 is a plan view block diagram of an insulating structure mated with a battery cell in accordance with one or more embodiments of the present application.

1000. A vehicle;

100. a battery; 200. a controller; 300. a motor;

10. a case; 11. a first portion; 12. a second portion;

20. A battery cell; 21. an end cap; 21a, electrode terminals; 22. a housing; 23. a cell assembly;

30. A heat insulating structure; 31. a support; 311. a first support portion; 312. a second supporting part; 32. a thermal insulation layer; 321. sticking the surface; 33. an air guide layer; 34. an air guide groove; 35. a glue layer; 40. a bracket 41, a first leg; 42. a second leg; 43 a third leg; l1, setting a direction; l2, a first direction; l3, stacking direction.

Detailed Description

Embodiments of the technical scheme of the present application 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 application, and thus are merely examples, and are not intended to limit the scope of the present application.

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 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 of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to 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 application, 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 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 appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, 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 addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, 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 application will be understood by those of ordinary skill in the art according to specific circumstances.

Currently, the application of power batteries is more widespread from the development of market situation. The power 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.

In the production process of the battery, a plurality of battery cells are required to be stacked along a certain set direction to form an entire battery module, however, with the gradual enhancement of the awareness of the use safety of the battery, the problem of thermal runaway of the battery is receiving a great deal of attention. When one of the battery monomers generates thermal runaway, heat can be transferred through the overlapped surfaces between the adjacent battery monomers, so that the safety performance of the other battery monomers is affected, heat diffusion is caused, and the safety performance of the battery is reduced.

In order to solve the above problems, in the conventional battery, a heat insulation structure, such as a heat insulation pad, is generally disposed between adjacent battery cells to reduce the risk of heat diffusion between the battery cells. However, because the thickness of the battery module is limited, the heat insulation pad cannot be set too thick, so that the heat insulation effect is poor due to the fact that the heat insulation pad is too thin, the heat insulation effect is required to be improved, the heat insulation is improved by continuously thickening the heat insulation pad, the volume is sacrificed, and the volume and the heat insulation effect cannot be simultaneously achieved.

Based on the above, in order to solve the problem that the heat insulation pad cannot achieve the heat insulation effect and small volume, the application provides the heat insulation structure, wherein the air diversion layer is introduced into the heat insulation pad to form the heat insulation pad with a multi-layer composite hollow structure, when heat is transferred to the air diversion layer, the air in the air diversion layer needs to be heated, and then the air is heated and then forms air convection with the outside, so that the heat residual quantity is greatly reduced, the heat transfer time is prolonged, and the safety risk caused by heat diffusion can be effectively reduced.

The battery cell disclosed by the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but is not limited to the electric devices. A power supply system having the battery cell, the battery, and the like disclosed in the present application constituting the power utilization device may be used.

The embodiment of the application provides an electric device using a battery as a power supply, wherein the electric device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft and the like. 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.

For convenience of description, the following embodiment will take an electric device according to an embodiment of the present application as an example of the vehicle 1000.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present application, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

Referring to fig. 2, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present application. The battery 100 includes a case 10 and a battery cell 20, and the battery cell 20 is accommodated in the case 10. The case 10 is used to provide an accommodating space for the battery cell 20, and the case 10 may have various structures. In some embodiments, the case 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 being overlapped with each other, the first portion 11 and the second portion 12 together defining an accommodating space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one end opened, the first portion 11 may be a plate-shaped structure, and the first portion 11 covers the opening side of the second portion 12, so that the first portion 11 and the second portion 12 together define a containing space; the first portion 11 and the second portion 12 may be hollow structures each having an opening at one side, and the opening side of the first portion 11 is engaged with the opening side of the second portion 12. Of course, the case 10 formed by the first portion 11 and the second portion 12 may be of various shapes, such as a cylinder, a rectangular parallelepiped, or the like.

In the battery 100, the battery cells 20 may be multi-layered, and the multi-layered battery cells 20 may be connected in series, parallel, or a series-parallel connection, where a series-parallel connection refers to both series connection and parallel connection in the multi-layered battery cells 20. The multiple layers of battery cells 20 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the multiple layers of battery cells 20 is accommodated in the box body 10; of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 20 in series, parallel or series-parallel connection, and the multiple battery modules are then connected in series, parallel or series-parallel connection to form a whole and are accommodated in the case 10. The battery 100 may also include other structures, for example, the battery 100 may also include a bus member for making electrical connection between the multiple layers of battery cells 20.

Wherein each layer of battery cells 20 may be a secondary battery or a primary battery; but not limited to, lithium sulfur batteries, sodium ion batteries, or magnesium ion batteries. The battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc.

Referring to fig. 3, fig. 3 is an exploded view of a battery cell 20 according to some embodiments of the present application. The battery cell 20 refers to the smallest unit constituting the battery. As shown in fig. 3, the battery cell 20 includes an end cap 21, a housing 22, a cell assembly 23, and other functional components.

The end cap 21 refers to a member that is covered at the opening of the case 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 may be adapted to the shape of the housing 22 to fit the housing 22. Optionally, the end cover 21 may be made of a material (such as an aluminum alloy) with a certain hardness and strength, so that the end cover 21 is not easy to deform when being extruded and collided, so that the battery cell 20 can have higher structural strength, and the safety performance can be improved. The end cap 21 may be provided with a functional member such as an electrode terminal 21 a. The electrode terminals 21a may be used to electrically connect with the cell assembly 23 for outputting or inputting electric power of the battery cell 20. In some embodiments, the end cap 21 may also be provided with a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the end cap 21 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application. In some embodiments, insulation may also be provided on the inside of the end cap 21, which may be used to isolate electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. By way of example, the insulation may be plastic, rubber, or the like.

The housing 22 is an assembly for mating with the end cap 21 to form the internal environment of the battery cell 20, where the internal environment may be formed to house the cell assembly 23, electrolyte, and other components. The case 22 and the end cap 21 may be separate members, and an opening may be provided in the case 22, and the interior of the battery cell 20 may be formed by covering the opening with the end cap 21 at the opening. It is also possible to integrate the end cap 21 and the housing 22, but specifically, the end cap 21 and the housing 22 may form a common connection surface before other components are put into the housing, and when it is necessary to encapsulate the inside of the housing 22, the end cap 21 is then put into place with the housing 22. The housing 22 may be of various shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 may be determined according to the specific shape and size of the cell assembly 23. The material of the housing 22 may be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the embodiment of the present application.

The cell assembly 23 is a component in which electrochemical reactions occur in the battery cells 20. One or more layers of the cell assembly 23 may be contained within the housing 22. The cell assembly 23 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The parts of the positive electrode plate and the negative electrode plate with active substances form the main body part of the battery cell assembly, and the parts of the positive electrode plate and the negative electrode plate without active substances form the electrode lugs respectively. The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or located at two ends of the main body portion respectively. During charge and discharge of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab is connected with the electrode terminal to form a current loop.

According to some embodiments of the present application, referring to fig. 4 to 5, the present application provides a heat insulation structure 30, which includes a supporting member 31, a heat insulation layer 32 and an air guiding layer 33, wherein the supporting member 31 forms a supporting space, the heat insulation layer 32 is disposed in the supporting space and connected with the supporting member 31, the heat insulation layer 32 includes a plurality of layers, all the heat insulation layers 32 are disposed along a set direction L1, and at least two heat insulation layers 32 are disposed at intervals with the air guiding layer 33 disposed therebetween.

Referring to fig. 6 to 9, a heat insulation structure 30 may be disposed between two adjacent battery cells 20 for spacing the two battery cells 20. The shape of the heat insulating structure 30 is disposed to be substantially the same as the shape of the opposite side walls of the stacked battery cells 20. The insulation layer 32 may be made of a material having insulation properties, such as aerogel blanket, aerogel, mica sheet having a fireproof insulation coating, and insulation sheet having elasticity at both sides, but the present application is not limited thereto.

Since the insulating layers 32 do not have supporting strength, and at least two adjacent insulating layers 32 are arranged at intervals, in order to ensure that all the insulating layers 32 can maintain a certain shape and ensure the integrity of the insulating structure 30, the supporting members 31 are arranged on the insulating layers 32, and the supporting members 31 are used for forming supporting spaces for supporting the insulating layers 32 so as to ensure that the insulating layers 32 can be connected with the supporting members 31 in a set shape. The structural strength of the support 31 is greater than that of the heat insulation layer 32, and the support 31 needs to have heat resistance to prevent the support 31 from being melted after the thermal runaway of the battery cells 20, if the support 31 may be a rubber structure.

It should be noted that, in preparing the heat insulation structure 30, the supporting member 31 may be disposed first to form a supporting space, and then the heat insulation layer 32 is placed in the supporting space and connected to the supporting member 31. The support 31 and the heat insulating layer 32 may be directly connected in a predetermined shape and position, and the space where the heat insulating layer 32 is located may be referred to as a support space.

When the air guide layer 33 is disposed between two adjacent heat insulating layers 32, there is a gap between the two facing surfaces of the two heat insulating layers 32, and when the air guide layer 33 is not disposed between the two adjacent heat insulating layers 32, the two facing surfaces of the two heat insulating layers 32 are bonded to each other.

When one of the battery cells 20 generates thermal runaway, the first heat is weakened after passing through the first heat insulating layer 32, before the heat is transferred to the second heat insulating layer 32, the air of the air guiding layer 33 between the first heat insulating layer 32 and the second heat insulating layer 32 needs to be heated, and the air in the air guiding layer 33 is heated to form air convection with the outside, so that the heat transferred to the second heat insulating layer 32 is greatly reduced, the heat transfer time is prolonged, and the heat can be greatly weakened when the heat passes through the air guiding layer 33 each time.

Thus, the heat insulation structure 30 of the present application greatly enhances the heat insulation effect of the heat insulation structure 30 by adding the air guide layer 33 without setting the thickness of the heat insulation layer 32 too thick, thereby realizing the reduction of the thickness and volume of the heat insulation structure 30 and enhancing the heat insulation effect.

According to some embodiments of the present application, optionally, all the heat insulation layers 32 are arranged at intervals along the set direction L1, and an air guiding layer 33 is disposed between every two heat insulation layers 32.

Namely, along the set direction L1, a heat insulation layer 32, an air guiding layer 33, a heat insulation layer 32, and an air guiding layer 33 are formed, and the heat insulation layers 32 are not contacted with each other, so that each heat insulation layer 32 needs to be connected with the supporting member 31 to ensure that the heat insulation layers 32 insulate heat in a set manner, and when the heat insulation structure 30 is placed between two battery cells 20, the set direction L1 is the stacking direction L3 of the battery cells 20.

When the battery cell 20 on one side is subjected to thermal runaway, heat is transferred from one side of the heat insulation structure 30 to the other side, the heat is weakened after the heat passes through the heat insulation layer 32, the air of the air guide layer 33 is heated and forms air convection with the outside, the heat transferred to the next heat insulation layer 32 is greatly reduced, then the air of the next air guide layer 33 is continuously heated and forms air convection with the outside, the heat transfer time is prolonged, and finally, the heat transferred to the battery cell 20 on the other side is very little, so that the risk that the adjacent battery cell 20 simultaneously reaches the thermal runaway due to the heat diffusion can be effectively reduced.

Further, the overall thickness of the heat insulation structure 30 is substantially smaller than that of one battery cell 20 in the stacking direction, and as for the thickness of each heat insulation layer 32 and the thickness of each air guide layer 33 formed, it is possible to provide targeted arrangement according to the size of the battery 100 or the specific situation, which is not limited herein,

According to some embodiments of the present application, optionally, referring to fig. 5 to 6, the heat insulation structure 30 includes an air guiding groove 34, the air guiding groove 34 is communicated with the air guiding layer 33 and the atmosphere, and the air guiding groove 34 is opened on the supporting member 31 and/or the heat insulation layer 32 along the set direction L1.

Specifically, the air guide groove 34 may be provided in the support 31 so as to penetrate or not penetrate in the set direction L1, and one end of the air guide groove 34 communicates with all of the air guide layers 33 and the other end communicates with the outside air.

When the air in the air guide layer 33 is heated, the hot air is convected with the outside air through the air guide groove 34, thereby consuming heat. The air guide groove 34 can increase the convection speed of the air guide layer 33 and the outside air, thereby enhancing the heat insulation effect.

It can be appreciated that in practical application, according to the heat convection requirement, the air guide grooves 34 may be disposed along the set direction L1 at each edge position of the heat insulation layer 32, so as to communicate with the multi-layer air guide layer 33, so as to improve the heat convection effect of the air guide layer 33 between adjacent heat insulation layers 32.

The specific shape and size of the air guide groove 34 are not limited, and it is equivalent to a communication passage that communicates the air guide layer 33 with the atmosphere, and thus the air guide groove 34 is an open space. Further, the air guide groove 34 is arranged on the supporting member 31, so that the structural integrity of the heat insulation layer 32 can be ensured, and the heat insulation effect of the heat insulation structure 30 is better.

According to some embodiments of the present application, optionally, the supporting member 31 is disposed on at least one side of the heat insulation layer 32 along the first direction L2, and the air guide groove 34 is disposed on the supporting member 31, where the first direction L2 intersects the set direction L1.

The normal placement direction of the battery cell 20 is forward, and when it is forward, the side of the end cap 21 on which the electrode terminal 21a is provided is disposed upward. At this time, the height direction of the battery cell 20 means a direction from one side surface provided with the electrode terminal 21a to the other side surface opposite thereto, and the thickness direction of the battery cell 20 is a stacking direction of the plurality of battery cells 20, and the stacking direction of the battery cell 20 means a direction perpendicular to the large surface of the battery cell 20. The large surface of the battery cell 20 generally refers to the surface of the battery cell 20 with the largest area.

When the heat insulation structure 30 is placed between the two battery cells 20, the first direction L2 may be the height direction of the battery cells 20. The supporting member 31 is disposed at one end edge or both end edges of the heat insulation structure 30 along the height direction of the battery cell 20, and forms a large-area heat insulation layer 32 to be abutted with the large surface of the battery cell 20, thereby ensuring the heat insulation effect.

Meanwhile, the air guide groove 34 is provided on the supporting member 31 at this time, and heat convection can be achieved through one side of the end cap 21 of the battery cell 20 and the outside air, or through the other side of the height direction of the battery cell 20 and the outside air. It will be appreciated that, during the assembly of the battery 100, a water cooling plate or other structure is generally assembled on the other side of the battery cell 20, which is far from the end cover 21, so that the support member 31 is disposed on one side of the battery cell 20, which is close to the end cover 21, and the air guide groove 34 is disposed thereon, so that the air guide layer 33 performs heat convection from above the battery cell 20, and the heat convection effect is better, and is not affected by other structures inside the battery 100 or other battery cells 20.

According to some embodiments of the present application, optionally, the support 31 includes a first support 311 and a second support 312; the first supporting part 311 and the second supporting part 312 are provided at opposite ends of all the insulation layers 32 along the first direction L2 and connected to each insulation layer 32; the first support portion 311 and/or the second support portion 312 are provided with an air guide groove 34.

Each insulation layer 32 is connected to the first supporting portion 311 and the second supporting portion 312 at opposite ends of the first direction L2, and at this time, the first supporting portion 311 and the second supporting portion 312 support each insulation layer 32 together along the first direction L2. The first support portion 311 and the second support portion 312 may have a rubber block structure having the same shape and size, and each heat insulating layer 32 is formed in a flat plate structure, and the heat insulating structure 30 having a plate structure as a whole is formed.

In actual assembly, the heat insulation structure 30 is disposed between adjacent battery cells 20 along the set direction L1 such that the set direction L1 is parallel to the stacking direction L3 of the battery cells 20, and naturally, the first support portion 311 and the second support portion 312 are located at both ends of the battery cells 20 in the height direction, one near the end cover 21, and one far from the end cover 21.

In order to secure the heat convection effect of the air guide layer 33, an air guide groove 34 may be provided on one of the first support portion 311 and the second support portion 312 near the end cover 21. Alternatively, the air guide grooves 34 may be provided on both sides to allow the assembly freedom, and the operator may freely reverse the assembly positions of the first support portion 311 and the second support portion 312.

According to some embodiments of the present application, optionally, the ratio of the thickness F1 of each insulation layer 32 to the thickness F2 of each air guiding layer 33 along the set direction L1 ranges from 1 to 2.

In the setting direction, assuming that the thickness F2 of one air guide layer 33 is X, the thickness F1 of each heat insulating layer 32 ranges from X to 2X. In this range, the thickness of each insulating layer 32 is not too thick or too thin, and the thickness of the air guiding layer 33 is not too thick or too thin, so that a better insulating effect can be provided in one direction, and on the other hand, the thickness range of the air guiding layer 33 is limited, so that the thickness of the insulating structure 30 is not too thick due to the fact that the thickness of the air reaches the flow path 33 is too thick.

According to some embodiments of the application, optionally, the ratio of the thickness F1 of each insulating layer 32 to the thickness F2 of each air guiding layer 33 is 1 along the set direction L1.

At this time, in the heat insulation structure 30, the thickness F2 of one air guiding layer 33 is X, the thickness F1 range of each heat insulation layer 32 is also X, and the effective heat insulation of the heat insulation structure 30 is achieved by the composite arrangement of the air guiding layer 33 and the heat insulation layers 32. It will be appreciated that the air deflection layer 33 and the insulation layer 32 of the same thickness provide better insulation from the air deflection layer 33, thereby reducing the amount of heat transferred between each adjacent two of the insulation layers 32 while also providing insulation from the insulation layers 32.

In one embodiment, when the total thickness of the insulation structure 30 is 3mm, two 1mm insulation layers may be formed with a 1mm air guiding layer 33 disposed therebetween.

According to some embodiments of the application, the total thickness of the insulating structure 30 may alternatively range from 3mm to 10mm along the set direction L1.

For example, the heat insulating layer 32 and the air and air guide layer 33 are each 1mm thick, a double-layer heat insulating layer 32 structure is formed, and an air guide layer having the same thickness as the heat insulating layer 32 is provided between the two heat insulating layers 32. Or one air guide layer 33 is arranged, the thickness of each heat insulation layer 32 is 2mm, the three heat insulation layers 32 are formed, the air guide layer 33 is arranged between any two heat insulation layers, and the heat insulation structure 30 with the total thickness of 7.5mm is formed.

Thus, the heat insulation effect can be enhanced by increasing the number of layers of the air guide layer 33 and the number of layers of the heat insulation layer 32, and the total thickness of the heat insulation structure 30 is limited to 3mm-10mm, so that the heat insulation structure 30 cannot be too thin to effectively insulate heat, and the overall structure of the battery 100 cannot be increased due to too thick.

According to some embodiments of the present application, optionally, the heat insulation structure 30 further includes a glue layer 35, and at least one of the two heat insulation layers 32 located at the outermost side in the set direction L1 forms an adhesive surface 321 facing away from the other. Each adhesive surface 321 is provided with an adhesive layer 35.

In the setting direction L1, the two heat insulating layers 32 located at the outermost sides have two opposite surfaces facing the outside, and the two surfaces are provided with glue layers 35, so that the heat insulating structure 30 has viscosity, and when assembled, the heat insulating structure 30 is placed between the two battery cells 20 and a certain pretightening force is applied along the stacking direction of the battery cells 20, so that the two battery cells 20 are tightly adhered to and adhered to the two glue layers 35 of the heat insulating structure 30.

It can be appreciated that after the adhesive layer 35 is disposed, the surface of the adhesive layer 35 may be coplanar with the first supporting portion 311 and the second supporting portion 312 in the first direction L2, or may directly spread onto the first supporting portion 311 and the second supporting portion 312, so as to ensure that a flat surface is formed to be attached to the battery cell 20.

Further, since the heat insulating layer 32 has poor strength and the air guide layer 33 having a hollow structure is provided inside, when the pre-tightening force is large, the heat insulating layer 32 inevitably deforms to some extent, and at this time, the volume and shape of the air guide layer 33 are changed. Similarly, when the battery 100 is assembled and used, if the battery 100 oscillates, the heat insulation layer 32 can be deformed accordingly, so as to reduce the risk of friction caused by mutual vibration between the battery cells 20, and improve the safety factor.

However, if the adjacent two heat insulating layers 32 are continuously deformed, the volume of the air guiding layer is continuously reduced, which affects the heat convection effect of the air guiding layer 33, so that the problem is solved:

According to some embodiments of the present application, optionally, referring to fig. 6 to 7, the heat insulation structure 30 further includes a bracket 40, and the bracket 40 is disposed in the air guiding layer 33 and connected to at least one of the two heat insulation layers 32 located at both sides.

The bracket 40 may have any shape, and may be made of the same material as the supporting member 31 to provide a certain supporting strength. Specifically, a plurality of brackets 40 may be disposed at intervals along the first direction L2 to fully support the insulation layers 32 on both sides.

When the bracket 40 is connected to only one of the two insulation layers 32 on both sides, a certain gap exists between the other end of the bracket 40 and the other of the two insulation layers 32 on both sides when the insulation structure 30 is not compressed, thereby providing a certain compression margin to ensure that the insulation layers 32 can deform to resist vibration and enhance the safety factor after the battery 100 oscillates.

Meanwhile, the arrangement of the bracket 40 can avoid the condition that the air guide layer 33 is infinitely compressed, so as to ensure the heat insulation effect.

Referring to a specific embodiment, an example of a bracket 40 is provided in fig. 7, which includes a first branch 41 and a second branch 42 disposed at intervals, and a third branch 43 intersecting and connected therebetween, where the first branch 41 and the second branch 42 are respectively used to abut against two insulation layers 32 on two sides. In other embodiments, the support 40 may be a rectangular block or other structure, and the application is not limited thereto.

According to a second aspect of the present application, there is also provided a battery 100 including a plurality of battery cells 20 stacked in a set direction L1 and the heat insulation structure 30 in any of the above embodiments, wherein the heat insulation structure 30 is disposed between at least two adjacent battery cells 20.

Based on the same conception as the heat insulation structure 30, the heat insulation structure 30 which can give consideration to heat insulation effect and small volume is arranged between the overlapped surfaces of two adjacent battery monomers 20, so that the risk that heat between adjacent batteries 100 is transferred through the overlapped surfaces to form heat diffusion to cause safety accidents is reduced, the heat can be diffused in the direction guided by the air guide layer 33, the safety performance of the batteries 100 is improved, and the structural compactness of the batteries 100 is ensured.

Further, a heat insulation structure 30 is provided between every two adjacent battery cells 20 to further improve the heat insulation effect.

According to some embodiments of the present application, alternatively, the battery cell 20 has an end cap 21 provided with an electrode terminal 21a, at least a portion of the support member 31 is provided near one side of the end cap 21, the heat insulation structure 30 includes an air guide groove 34, the air guide groove 34 is provided on a portion of the support member 31 near the end cap 21, and the air guide groove 34 communicates with the air guide layer 33.

The specific arrangement of the supporting member 31 and the air guide groove 34 is described in detail above, and will not be repeated here. By providing the air guide groove 34 on the portion of the support 31 near the end cap 21, the heat convection effect of the air guide layer 33 is ensured.

According to a third aspect of the present application, there is further provided an electric device, including the battery 100 in the above embodiment, where the battery 100 is used to provide electric energy.

Referring to fig. 4 to 9, the present application provides a heat insulation structure 30, which is adhered between every two adjacent battery cells 20, wherein the heat insulation structure 30 includes a first supporting portion 311, a second supporting portion 312, a plurality of heat insulation layers 32 arranged at intervals along a set direction L1, and an air guiding layer 33 formed between every two heat insulation layers 32, the first supporting portion 311 and the second supporting portion 312 are connected to two ends of each heat insulation layer 32 along a first direction L2, at least one of the two heat insulation layers is provided with an air guiding groove 34 communicating with the air guiding layer 33 and the outside, and adhesive layers 35 are arranged on two outermost sides of the set direction L1 to adhere to the battery cells 20 on two sides. When one of the battery cells 20 is out of control, heat is sequentially transferred along the heat insulation layer 32, the air guide layer 33, the heat insulation layer 32 and the air guide layer 33, and the heat is consumed to a greater extent through the heat convection between the air and the outside air when passing through the air guide layer 33, so that the heat transferred to the other battery cell 20 is reduced, and the risk of the other battery cell 20 out of control is reduced. And at the same time, the thickness of the heat insulation structure 30 is not excessively thick, and the compact structure of the battery 100 is ensured.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application 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 application, and are intended to be included within the scope of the appended claims and description. 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 (11)

1. A thermal insulation structure, comprising:

A support member forming a support space;

The heat insulation layers are arranged in the supporting space and connected with the supporting piece, each heat insulation layer comprises a plurality of layers, and all the heat insulation layers are distributed along the set direction;

The heat insulation structure further comprises an air guide layer, at least two heat insulation layers are arranged at intervals, and the air guide layer is arranged between the heat insulation layers.

2. The heat insulating structure according to claim 1, wherein all the heat insulating layers are arranged at intervals along a set direction, and the air guide layer is arranged between every two heat insulating layers.

3. The insulation structure of claim 1, wherein the insulation structure comprises an air guide slot in communication with both the air conduction layer and the atmosphere;

The air guide groove is arranged on the support piece and/or the heat insulation layer along the set direction.

4. A thermal insulation structure according to claim 3, wherein the support is provided at least one end of the thermal insulation layer in a first direction, and the air guide groove is provided on the support;

the first direction intersects the set direction.

5. The insulation structure of claim 4, wherein the support comprises a first support and a second support;

The first supporting part and the second supporting part are arranged at two opposite ends of all the heat insulation layers along the first direction and are connected with each heat insulation layer;

The first supporting part and/or the second supporting part is/are provided with the air guide groove.

6. The structure according to any one of claims 1 to 5, wherein a ratio of a thickness of each of the heat insulating layers to a thickness of the air guide layer is in a range of 1 to 2 in the set direction.

7. The heat insulating structure according to any one of claims 1 to 5, further comprising a glue layer, wherein two opposite adhesive faces are formed in two outermost heat insulating layers in the set direction;

Each layer of the adhesive surface is provided with the adhesive layer.

8. The insulation structure of any one of claims 1-5, further comprising a bracket disposed within the air guiding layer and connected to at least one of the two insulation layers on both sides.

9. A battery comprising a plurality of battery cells stacked in the set direction and the heat insulating structure according to any one of claims 1 to 8;

Wherein the heat insulation structure is arranged between at least two adjacent battery monomers.

10. The battery according to claim 9, wherein the battery cell has an end cap provided with an electrode terminal;

The support piece is at least partially arranged on one side close to the end cover, the heat insulation structure comprises an air guide groove, the air guide groove is arranged on the part, close to the end cover, of the support piece, and the air guide groove is communicated with the air guide layer.

11. A powered device comprising a battery as claimed in any one of claims 9-10, said battery being adapted to provide electrical energy.