CN218939812U - Box, battery and power consumption device - Google Patents

Abstract

The application is applicable to the technical field of batteries and provides a box, a battery and an electric device. The box is used for the battery, and the box includes: the box body is internally provided with an accommodating space; a thermal insulation coating coated on at least one surface of the tank body; wherein, the case body includes the bottom plate, at least one side of bottom plate is equipped with the heat preservation coating. The box body has good heat insulation effect, and is favorable for keeping the stability and constancy of the working temperature of the battery.

Description

Box, battery and power consumption device

Technical Field

The present disclosure relates to battery technology, and particularly to a case, a battery, and an electric device.

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.

Batteries generally need to be maintained in a constant temperature range, however, the conventional case has a high thermal conductivity, and the external ambient temperature has a great influence on the internal ambient temperature of the battery, thereby affecting the stability and constancy of the operating temperature of the battery.

Disclosure of Invention

In view of this, this application embodiment provides a box, battery and power consumption device, can promote the thermal-insulated heat preservation effect of box, is favorable to keeping battery operating temperature's stability and constancy.

An embodiment of a first aspect of the present application proposes a case, including: the box body is internally provided with an accommodating space; a thermal insulation coating disposed on at least one surface of the tank body; wherein, the case body includes the bottom plate, at least one side of bottom plate is equipped with the heat preservation coating.

The box body comprises a box body and a heat preservation coating, wherein an accommodating space is formed in the box body, and the accommodating space can accommodate battery monomers; the thermal insulation coating is arranged on at least one surface of the box body. The heat insulation coating has good heat insulation performance, improves the heat conductivity coefficient of the box body, reduces the speed of heat exchange between the box body and the environment, improves the heat insulation and heat preservation capabilities of the box body, and is beneficial to keeping the stability and constancy of the working temperature of the battery. Meanwhile, the heat-insulating coating is convenient to manufacture, and the box body is simple in structure and high in manufacturing efficiency. The box that this application embodiment provided need not to set up insulation structures such as insulation foam, has solved insulation foam's material cost and has pasted insulation foam's cost of labor height's problem.

In some embodiments, the surface of the bottom plate facing away from the accommodation space is coated with the insulating coating.

Through set up heat preservation coating at the surface that the bottom plate deviates from accommodation space, can effectively guarantee the heat preservation effect of box.

In some embodiments, the base plate is a heat exchange plate containing a heat exchange medium.

Through adopting above-mentioned technical scheme, the case body can be enough adjust and come the free temperature of telephone through heat transfer medium, still can reduce inside and outside heat exchange through heat preservation coating, cooperates thermal management system, can make the box reach similar homothermal effect.

In some embodiments, the surface of the bottom plate facing away from the accommodating space is provided with flow channel protrusions, and the heat-insulating coating covers the flow channel protrusions and gaps between the flow channel protrusions.

Through adopting above-mentioned technical scheme, heat preservation coating laminates mutually with the bottom plate, can cover the protruding and gap between the protruding of runner, and heat preservation coating's laminating nature is better, and the cover is comprehensive to the heat preservation effect is better.

In some embodiments, the case body further includes a side plate disposed around an edge of the bottom plate, the side plate including oppositely disposed inner and outer surfaces, the inner surface disposed toward the receiving space; at least one of the inner surface and the outer surface is provided with the heat-insulating coating.

Because the curb plate encloses to be located battery monomer's week side, through setting up heat preservation coating in the at least one side of curb plate, can reduce the heat exchange of box with the environment, promote thermal-insulated, heat preservation effect.

In some embodiments, the insulating coating is an aerogel coating.

Through adopting above-mentioned technical scheme, aerogel coating's coefficient of heat conductivity is extremely low, has better heat preservation, thermal-insulated performance, can show the holistic coefficient of heat conductivity of reduction box apron.

In some embodiments, the thermal barrier coating has a thickness of 0.5mm to 2.5mm.

By adopting the technical scheme, the heat-insulating coating with the thickness can meet the heat-insulating requirement of the battery under most low-temperature conditions.

In some embodiments, the thermal conductivity of the thermal barrier coating is less than 0.05W/Mk.

By adopting the technical scheme, the heat-insulating coating is manufactured by adopting the high-efficiency heat-insulating coating, so that the heat exchange speed of the box body and the environment is obviously reduced.

In some embodiments, the case further comprises an impact resistant layer disposed on a surface of at least one of the bottom panel and the side panel.

By adopting the technical scheme, the box body further comprises an impact resistant layer, so that the impact resistance and the energy absorption capacity are improved; when the box body encounters collision, the probability of deformation is reduced.

In some embodiments, the surface of the bottom plate facing away from the accommodating space is provided with the impact-resistant layer and the heat-insulating coating, and the impact-resistant layer is arranged between the bottom plate and the heat-insulating coating.

By adopting the technical scheme, the impact-resistant layer is directly attached to the surface of the bottom plate, so that the tearing strength and the tensile strength of the bottom plate can be improved; the heat preservation coating is arranged on the outer side of the impact resistant layer, so that the heat preservation effect is not affected.

In some embodiments, the case further comprises a fire-resistant coating disposed on a surface of at least one of the bottom panel and the side panels.

By adopting the technical scheme, the fireproof coating can delay the diffusion speed of open fire to the outside of the battery, and the use safety of the battery is improved.

In some embodiments, the fireproof coating is arranged on the surface of the bottom plate facing the accommodating cavity, and the heat-insulating coating is arranged on the surface of the bottom plate facing away from the accommodating cavity; or, the fireproof coating and the heat-insulating coating are both arranged on the surface of the bottom plate facing the accommodating cavity, and the fireproof coating is arranged between the bottom plate and the heat-insulating coating.

By adopting the technical scheme, the fireproof coating is directly attached to the surface of the bottom plate, so that the bottom plate can be protected when the battery is ignited and burnt.

In some embodiments, the tank further comprises a bottom guard plate connected to the bottom of the tank body, and a water flowing groove is formed in one surface of the bottom guard plate, which faces the bottom plate.

Through adopting above-mentioned technical scheme, the backplate can strengthen the intensity of box bottom, and the water in the basin can derive the box, avoids moisture to influence the performance of battery.

In some embodiments, the number of the water flowing grooves is plural, and the water flowing grooves are respectively arranged on three sides of the bottom guard plate at intervals.

By adopting the technical scheme, the box body is convenient for timely discharging water in the box body in the running process of the vehicle.

Embodiments of the second aspect of the present application provide a battery, including the case provided in the first aspect, and a battery cell, where the battery cell is accommodated in the case.

Embodiments of the third aspect of the present application provide an electrical device comprising a battery provided in the second aspect, the battery being configured to provide electrical energy.

The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the description of the embodiments or the conventional technology will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic view of a vehicle according to an embodiment of the present disclosure;

fig. 2 is an exploded view of a battery according to an embodiment of the present application;

FIG. 3 is an exploded view of a case according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a base plate according to an embodiment of the present disclosure;

FIG. 5 is a cross-sectional view of the base plate shown in FIG. 4 taken along line A-A;

FIG. 6 is an enlarged view of a portion B of the floor shown in FIG. 5;

FIG. 7 is a schematic perspective view of a base plate according to another embodiment of the present disclosure;

FIG. 8 is an enlarged view of a portion C of the base plate shown in FIG. 7;

FIG. 9 is an exploded view of a case according to yet another embodiment of the present application;

fig. 10 is a partially enlarged view of the D portion of the case shown in fig. 9.

The meaning of the labels in the figures is:

1000. a vehicle; 100. a battery; 200. a controller; 300. a motor;

10. a case; 20. a battery cell;

11. a case body; 111. a bottom plate; 1111. a first face; 1112. a second face; 112. a side plate; 113. an accommodation space; 114. the flow channel is convex;

12. a heat preservation coating;

13. an impact resistant layer;

14. a bottom guard board; 141. a water flowing groove.

Detailed Description

Embodiments of the technical solutions 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 solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection 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 and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first," "second," etc. 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 present 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, which means that three relationships may exist, for example, a and/or B may mean: 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" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to 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", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are orientation or positional relationship based on the drawings, and are merely for convenience of describing the embodiments of the present application and simplifying the description, and are not intended to indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus 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 are to 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 the specific circumstances.

At present, the inventor of the application notes that the traditional box body mainly adopts a metal shell, so that the heat dissipation of the battery is facilitated, however, in the low-temperature environment in winter, the box body cannot well preserve heat, and the performance of the battery at low temperature is obviously reduced.

The inventor researches and discovers that the existing box body has heat exchange with the environment, is unfavorable for keeping the heat in the battery under the low-temperature environment, and has poor heat preservation performance.

In order to solve the above problems, the inventors have conducted intensive studies and devised a case, a battery, and an electric device. The box body comprises a box body, and an accommodating space is arranged in the box body; the box body further comprises a heat-insulating coating, and the heat-insulating coating is arranged on at least one surface of the box body. Because the heat preservation coating is arranged on at least one surface of the box body, the heat conduction coefficient of the box body is reduced by the heat preservation coating, namely, the heat exchange speed of the box body and the environment is reduced, and the heat preservation performance is improved, so that the heat insulation effect of the battery can be improved by the box body, and the stability and constancy of the working temperature of the battery are further ensured.

The battery cell disclosed by the embodiment of the application can be used for an electric device using a battery as a power supply or various energy storage systems using the battery as an energy storage element. The power device may be, but is not limited to, a cell phone, tablet, notebook computer, electric toy, electric tool, battery car, electric car, ship, spacecraft, etc. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

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 present 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 a schematic diagram illustrating an exploded structure of a battery 100 according to some embodiments of the present application, where 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 the battery 100, the plurality of battery cells 20 may be connected in series, parallel or a series-parallel connection, wherein the series-parallel connection refers to that the plurality of battery cells 20 are connected in series or parallel. The plurality of battery cells 20 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting a plurality of battery cells 20 in series or parallel or series-parallel connection, and a plurality of battery modules are then connected in series or parallel or series-parallel connection to form a whole and are accommodated in the case 10. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for making electrical connection between the plurality of battery cells 20.

Wherein each battery cell 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. 2 to 6, an embodiment of a first aspect of the present application provides a case 10 for a battery. The case 10 includes a case body 11, and an accommodating space (not shown) is provided in the case body 11; the case 10 further includes a thermal insulation coating 12, the thermal insulation coating 12 being provided on at least one surface of the case body 11.

In the present embodiment, the case body 11 may have a case-like structure as shown in fig. 2 or a tray-like structure as shown in fig. 3. The case body 11 is provided therein with an accommodation space for accommodating the battery cell 20.

The thermal insulation coating 12 is provided on at least one surface of the tank body 11, i.e., the thermal insulation coating 12 may be provided on any one of the inner surface and the outer surface of the tank body 11. The location at which the thermal barrier coating 12 is applied may be specifically set depending on the specific structure and use requirements of the box body.

The thermal insulation coating 12 has a low thermal conductivity, and the thermal insulation coating 12 has a high thermal insulation performance. The heat conductivity coefficient refers to a material with a thickness of 1m under a stable heat transfer condition, the temperature difference of the two side surfaces is 1℃ (K), and the heat transferred through the area of 1 square meter in a certain time is expressed in W/(m.K)). For example, the thermal conductivity of the case body 11 is greater than 200W/(m·k), and the thermal conductivity of the thermal insulation coating 12 is less than 0.05W/(m·k), and therefore, the thermal conductivity of the thermal insulation coating 12 is much smaller than that of the case body 11, so that the thermal insulation coating 12 can reduce the thermal conductivity of the case body 10, and the speed at which the case body 10 exchanges heat with the environment can be reduced.

The case body 11 includes a bottom plate 111, and at least one surface of the bottom plate 111 is provided with a heat insulating coating 12.

The bottom plate 111 is a plate-shaped structure for providing a supporting force for the battery cells 20 disposed in the receiving space, and the bottom plate 111 is positioned at the bottom of the battery cells 20 according to a conventional placement direction of the battery after the battery cells 20 are assembled in the case 10. The bottom plate 111 has a first surface 1111 and a second surface 1112 disposed opposite to each other, the second surface 1112 being a surface facing away from the accommodating space, and the second surface 1112 being a bottom surface of the bottom plate 111 in a conventional placement direction of the battery. Wherein, at least one surface of the bottom plate 111 is provided with the thermal insulation coating 12, that is, at least one surface of the first surface 1111 and the second surface 1112 is provided with the thermal insulation coating 12, which can reduce the thermal conductivity of the bottom plate 111, thereby reducing the heat exchange between the box 10 and the environment.

Above-mentioned box 10 can promote the heat preservation effect of battery, promotes the performance of battery under low temperature environment, prevents that the battery from taking place low temperature diving, promotes the temperature holding capacity of battery under the low temperature condition to improve the low temperature environment adaptability and the low temperature charge-discharge effect of battery, and then promoted the duration of battery, prolonged the life of battery. Similarly, the case 10 can also have good heat insulation and preservation capability in a high temperature environment, and the influence of external high temperature on the performance of the battery is avoided. Therefore, the case 10 has good heat insulation performance, and can reduce the influence of the external high-temperature or low-temperature environment on the battery performance.

The box body 10 provided by the embodiment of the application comprises a box body 11 provided with an accommodating space and a heat preservation coating 12, wherein the accommodating space is arranged in the box body 11; a thermal insulation coating 12 is provided on at least one surface of the tank body 11. Because the heat conductivity of the heat preservation coating 12 is lower and the heat preservation coating 12 has better heat insulation performance, the heat conductivity of the box body 10 is improved by the heat preservation coating 12, the heat exchange speed between the box body 10 and the environment is reduced, the heat insulation and heat preservation capabilities of the box body 10 are improved, and the stability and constancy of the working temperature of the battery are maintained. Meanwhile, the heat-insulating coating 12 is a coating and can be coated on the box body 10 in an integrated spraying mode, so that the heat-insulating coating is convenient to manufacture, and the box body 10 is simple in structure and high in manufacturing efficiency. The box 10 that this application embodiment provided need not to set up insulation structures such as insulation foam, has solved insulation foam's material cost and just paste insulation foam's cost of labor problem high.

In some embodiments, the surface of the bottom plate 111 facing away from the receiving space is coated with a thermal barrier coating 12.

The surface of the bottom plate 111 facing away from the accommodating space is the outer surface of the bottom plate 111 facing outwards, and the area of the bottom plate 111 is larger, so that the heat insulation effect of the box 10 can be effectively ensured at least by coating the surface of the bottom plate 111 facing away from the accommodating space with the heat insulation coating 12.

Alternatively, the heat-insulating coating 12 may cover the second face 1112 completely, the larger the coverage area of the heat-insulating coating 12, the better the heat-insulating effect. The heat-insulating coating 12 also has a waterproof effect, and at this time, the sealing strips do not need to be manually adhered to the edge of the bottom plate 111 of the box 10, so that the structure of the box 10 is further simplified, and the cost reduction, synergy and industrial production are facilitated. In other embodiments, the insulating coating 12 may also cover a partial area of the second face 1112.

It will be appreciated that in addition to the second side 1112 of the base plate 111 being coated with the thermal barrier coating 12, the first side 1111 of the base plate 111 may alternatively be coated with the thermal barrier coating 12.

By providing the heat-insulating coating 12 on the surface of the bottom plate 111 facing away from the accommodation space, the heat-insulating effect of the case 10 can be effectively ensured.

As shown in fig. 3-6, in some embodiments, the bottom plate 111 is a heat exchange plate containing a heat exchange medium.

In particular, the heat exchange plates are used to regulate the temperature of the battery cells 20. The heat exchange plate may be plate-shaped, the heat exchange medium in the heat exchange plate may be fluid (liquid) or gas, and the temperature adjustment means heating or cooling the battery cells 20. Alternatively, the fluid may be circulated to achieve better temperature regulation. Alternatively, the fluid may be water, a mixture of water and ethylene glycol, or air, etc.

When the bottom plate 111 adopts a heat exchange plate structure, since the first surface 1111 of the bottom plate 111 facing the accommodating space is used for adjusting the temperature of the battery unit 20, the heat insulation coating 12 may be formed on the second surface 1112 of the bottom plate 111 by spraying, alternatively, the heat insulation coating 12 may be sprayed on a part or the whole of the second surface 1112, that is, the heat insulation coating 12 covers at least a part of the second surface 1112.

The heat exchange plate can be made of aluminum, the heat conductivity coefficient of the heat exchange plate is larger than 200W/MK, and after the heat preservation coating 12 is sprayed, the heat exchange plate is taken as a whole, and the heat conductivity coefficient of the heat exchange plate can reach about 0.05W/MK. Therefore, the heat-insulating coating 12 can significantly reduce the heat conductivity coefficient of the heat exchange plate and reduce the heat exchange speed of the heat exchange plate in the external environment. It is understood that the heat exchange plate may be made of plastic or other materials, and the heat conductivity coefficient may be less than or equal to 200W/Mk. At this time, the thermal insulation coating 12 can still significantly reduce the thermal conductivity of the heat exchange plate.

Through adopting above-mentioned technical scheme, the bottom plate 111 of case body 11 is the heat transfer board, and the surface that bottom plate 111 deviates from accommodation space scribbles and is equipped with heat preservation coating 12, so, case body 11 can be enough adjusted through heat transfer medium to adjust the temperature of battery monomer 20, still can reduce inside and outside heat exchange through heat preservation coating 12, cooperation thermal management system can make case 10 reach similar homothermal effect.

In some embodiments, the bottom plate 111 is a heat exchange plate, the surface of the bottom plate 111 facing away from the accommodating space is provided with flow channel protrusions 114, and the heat insulating coating 12 covers the flow channel protrusions 114 and gaps between the flow channel protrusions 114.

Specifically, the first surface 1111 of the heat exchange plate is used for exchanging heat for the battery unit 20, and the first surface 1111 may be a plane; the second surface 1112 faces the outside of the battery, and the flow passage protrusion 114 is protruding from the second surface 1112, and the inside of the flow passage protrusion 114 is used for flowing the heat exchange medium. The thermal insulation coating 12 is coated on the second surface 1112, and the thermal insulation coating 12 covers the runner protrusions 114 and gaps between the runner protrusions 114.

Through adopting above-mentioned technical scheme, heat preservation coating 12 laminates mutually with bottom plate 111, can cover the clearance between the protruding 114 of runner and the protruding 114 of runner, and heat preservation coating 12's laminating nature is better, and the cover is comprehensive to the heat preservation effect is better.

In other embodiments, the second surface 1112 is planar, and the interior of the base 111 is provided with flow channels, so that the thermal barrier coating 12 may still cover at least a portion of the second surface 1112.

Referring to fig. 9 and 10, in some embodiments, the bottom plate 111 is a plate body, and no flow channels and no heat exchange medium are provided. Fig. 9 illustrates the accommodation space 113 inside the tank body 11.

Optionally, the surface of the bottom plate 111 facing away from the accommodating space 113 is provided with a heat-insulating coating 12, so that the box 10 has a better heat-insulating effect. The surface of the bottom plate 111 facing the receiving space 113 may also be optionally provided with a thermal insulation coating 12.

In some embodiments, the case body 11 further includes a side plate 112 disposed around an edge of the bottom plate 111, the side plate 112 including oppositely disposed inner and outer surfaces, the inner surface being disposed toward the receiving space 113; at least one of the inner and outer surfaces is provided with a thermal barrier coating 12.

The side plate 112 is disposed at the circumferential side of the bottom plate 111, and the side plate 112 is a plate-shaped structure for forming the receiving space 113 and providing lateral blocking for the battery cells 20 disposed in the receiving space 113 to prevent the battery cells 20 from being separated from the receiving space 113.

The side plate 112 may be fixedly connected to the bottom plate 111 or may be integrally formed. The bottom plate 111 and the side plates 112 define a receiving space, and one or more battery cells 20 can be arranged in the receiving space 113.

Optionally, during assembly, after the bottom plate 111 and the side plate 112 are fixedly connected or are supplied as an integral structure, the surface of the box body 11 is integrally sprayed, so that the manufacturing efficiency of the box body 10 is high.

Because the side plate 112 is arranged around the battery cell 20, the heat exchange between the box 10 and the environment can be reduced by arranging the heat-insulating coating 12 on at least one surface of the side plate 112, and the heat insulation and heat preservation effects are improved.

Referring to fig. 3-10, in some embodiments, the thermal insulation coating 12 is an aerogel coating.

The thermal insulation coating 12 is an aerogel coating, i.e., the main component of the thermal insulation coating 12 comprises aerogel. The aerogel coating has extremely low heat conductivity coefficient and good heat preservation and insulation performances. Optionally, the aerogel coating contains SiO2 aerogel materials, so that the aerogel coating has excellent heat insulation performance and durability.

By adopting the technical scheme, the aerogel coating has extremely low heat conductivity, good heat preservation and heat insulation performances and can obviously reduce the overall heat conductivity of the box 10.

In some embodiments, the insulating coating 12 includes an acrylic emulsion, silica aerogel powder, and hollow glass microspheres.

Specifically, the heat-insulating coating 12 uses acrylic resin emulsion as a film material and uses silica aerogel powder and hollow glass microspheres as a filler. The silica aerogel powder has the functions of heat insulation and heat preservation, and the hollow glass beads are of hollow spherical structures, so that the silica aerogel powder has good heat preservation performance, impact resistance and bending stress resistance.

By adopting the technical scheme, the heat-insulating coating 12 has excellent heat-insulating performance and better toughness and durability.

In some embodiments, the thickness of the thermal barrier coating 12 is from 0.5mm to 2.5mm, for example, the thickness of the thermal barrier coating 12 is 0.5mm, 1mm, 1.2mm, 1.5mm, 1.7mm, 2mm, 2.5mm, etc.

Because the heat preservation coating 12 is an aerogel coating, the heat preservation coating 12 using the aerogel coating has excellent heat preservation performance, and the heat preservation requirement of the battery can be met without making the heat preservation coating 12 too thick. It will be appreciated that the thickness of the insulating coating 12 may be adjusted as desired. Further, the thickness of the heat-insulating coating 12 is 1mm to 2mm.

By adopting the above technical scheme, the thermal insulation coating 12 with such thickness can meet the thermal insulation requirement of the battery under most low temperature or high temperature conditions.

In some embodiments, the thermal conductivity of the thermal barrier coating 12 is less than 0.05W/Mk.

Typically, a coating with a thermal conductivity of less than 0.12W/Mk is a thermal insulation coating, and a coating with a thermal conductivity of less than 0.05W/Mk is a high-efficiency thermal insulation coating, i.e., the thermal insulation coating 12 employed in the embodiments of the present application is a high-efficiency thermal insulation coating.

By adopting the technical scheme, the heat-insulating coating 12 is manufactured by adopting the high-efficiency heat-insulating coating, so that the heat exchange speed of the box body 10 and the environment is obviously reduced, the box body 10 has a good heat-insulating effect, the adaptability of the low-temperature/high-temperature environment of the battery is improved, the capacity retention of the battery is improved, the service life of the battery is prolonged, the low-temperature charge and discharge effect is improved, and the low-temperature charge and discharge power is exerted.

As shown in fig. 8, in some embodiments, the case 10 further includes an impact resistant layer 13, the impact resistant layer 13 being provided on a surface of at least one of the bottom plate 111 and the side plate 112.

The impact-resistant layer 13 is made of a material with strong impact resistance, and can improve the tensile strength and tear resistance of the bottom plate 111 and/or the side plates, and improve the impact resistance. For example, the impact-resistant layer 13 may be made of a dendrimer-modified polyurea or an elastomer. Alternatively, the impact resistant layer 13 may be disposed on the outer surface of the bottom plate 111, the outer surface of the side plate 112, or both the bottom plate 111 and the side plate 112.

By adopting the technical scheme, the box body 10 further comprises the impact resistant layer 13, so that the impact resistance and the energy absorption capacity are improved; when the case 10 encounters a collision, the probability of deformation is reduced.

In some embodiments, the impact resistant layer 13 is provided on the surface of the base plate 111 facing away from the accommodation space 113, and when both the impact resistant layer 13 and the heat insulating coating 12 are provided on the same side of the base plate 111, the impact resistant layer 13 is provided between the base plate 111 and the heat insulating coating 12.

Since the second surface 1112 of the bottom plate 111 faces outward, the impact resistant layer 13 may be provided on the second surface 1112, i.e., on the surface of the bottom plate 111 facing away from the accommodation space 113.

Specifically, the bottom plate 111 may be a heat exchange plate shown in fig. 3, or may be a common plate body shown in fig. 9.

The impact-resistant layer 13 is disposed between the base plate 111 and the thermal insulation coating 12, i.e. the impact-resistant layer 13 is disposed on the base plate 111 before the thermal insulation coating 12 is coated on the base plate 111. The impact-resistant layer 13 is directly attached to the surface of the base plate 111, and can improve the tear resistance and tensile strength of the base plate 111; the heat-insulating coating 12 is arranged on the outer side of the impact-resistant layer 13, so that the heat-insulating effect is not affected.

By adopting the technical scheme, the impact-resistant layer 13 and the heat-insulating coating 12 can be overlapped on the same surface of the bottom plate 111, and the bottom plate 111 has better heat-insulating performance and impact-resistant performance.

In some embodiments, the base panel 111 has a tear strength of 96kN/m to 141kN/m and a tensile strength of 18MPa to 25MPa.

Specifically, the bottom of the base plate 111 may be subjected to a ball impact test, using a steel ball of 25 mm diameter and an impact energy 120J, which ensures that the part is not deformed. Alternatively, the base plate 111 has a tear strength of 114kN/m and a tensile strength of 22MPa.

By adopting the above technical scheme, the base plate 111 with the impact resistant layer 13 improves the impact resistance, and can reduce the probability of collision deformation.

In other embodiments, the impact-resistant layer 13 may be provided only on the bottom plate 111 and the heat-insulating coating 12 may be provided only on the side plate 112, the heat-insulating coating 12 may be provided only on the bottom plate 111 and the impact-resistant layer 13 may be provided only on the side plate 112, or either one of the bottom plate 111 and the side plate 112 may be provided with the impact-resistant layer 13 and the heat-insulating coating 12 at the same time. That is, the impact resistant layer 13 and the heat insulating coating 12 may be coated on a certain surface of the bottom plate 111 and the side plate 112 separately.

In some embodiments, the case 10 further includes a fire-resistant coating disposed on a surface of at least one of the bottom panel 111 and the side panels 112.

Specifically, the fireproof coating may be disposed on the surface of the bottom plate 111, the surface of the side plate 112, or both the surfaces of the bottom plate 111 and the side plate 112. Since the case 10 may have a fire burning phenomenon, a fireproof coating may be provided on the inner surface of the bottom plate 111 and/or the side plate 112. It will be appreciated that the exterior surfaces of the bottom panel 111 and/or the side panels 112 may also be optionally coated with a fire resistant coating.

The fireproof coating can be a high-efficiency heat-resistant material, and the specific material of the fireproof coating is not limited. Optionally, the fireproof coating is a dendrimer flame-retardant heat-insulating fireproof coating.

Alternatively, the fire-retardant coating may be made by hand brushing or spray gun spraying. The heat-resistant temperature of the fireproof coating can reach 1200 ℃.

Alternatively, the heat insulating coating 12, the impact resistant layer 13, and the fireproof coating may be provided at the same time on the surface of any one of the bottom plate 111 and the side plate 112.

By adopting the technical scheme, the fireproof coating can delay the diffusion speed of open fire to the outside of the battery, and the use safety of the battery is improved.

In some embodiments, the fire-resistant coating is provided on the surface of the base plate 111 facing the receiving cavity, and the thermal-insulating coating 12 is provided on the surface of the base plate 111 facing away from the receiving cavity; alternatively, the fireproof coating and the thermal insulation coating 12 are both disposed on the surface of the bottom plate 111 facing the accommodating cavity, and the fireproof coating is disposed between the bottom plate 111 and the thermal insulation coating 12.

When the first surface 1111 of the bottom plate 111 is provided with the fireproof coating and the thermal insulation coating 12, the fireproof coating can be coated first, and then the thermal insulation coating 12 can be coated, i.e. the fireproof coating is arranged between the bottom plate 111 and the thermal insulation coating 12, so that the best and efficient thermal insulation performance is ensured first, and the thermal insulation coating is suitable for common working conditions; under the condition of fire, the fireproof coating is close to the bottom plate, so that the damage of fire to the bottom plate can be reduced; likewise, a fire-resistant coating may also be provided between the side panels 112 and the thermal insulation coating 12.

By adopting the above technical scheme, the fireproof coating is directly attached to the surface of the bottom plate 111, so that the bottom plate 111 can be protected when the fire burns in the battery.

In some embodiments, the tank 10 further includes a bottom guard plate 14 connected to the bottom of the tank body 11, and a water drain groove 141 is provided on a side of the bottom guard plate 14 facing the bottom plate 111.

The bottom guard 14 may be coupled to the bottom of the bottom plate 111 and/or the side plate 112, and the bottom guard 14 may have a plate-like structure having the same or similar shape as the bottom plate 111 for enhancing the strength of the bottom plate 111.

When the side plate 112 is flush with the bottom of the bottom plate 111, the bottom guard plate 14 is connected to the bottoms of the side plate 112 and the bottom plate 111; when the bottom of the side plate 112 protrudes from the bottom of the bottom plate 111, the bottom guard plate 14 is connected to the bottom of the side plate 112; when the bottom of the bottom plate 111 protrudes from the bottom of the side plate 112, the bottom guard 14 is attached to the bottom of the bottom plate 111. The bottom guard 14 serves to prevent bottom puncture and bottom stone impact, and keeps the battery cells 20 in the case 10 in a stable state. In other embodiments, the bottom shield 14 may be omitted if an impact resistant coating is provided on the bottom plate 111.

The bottom cover 14 has a water flow channel 141 on one surface facing the bottom plate 111, and the water flow channel 141 is a recessed groove recessed toward the bottom plate 111, and can guide out water on the bottom plate 111.

Further, the number of the water flowing grooves 141 may be plural, and the water flowing grooves 141 are respectively provided on three sides of the bottom guard plate 14 at intervals.

After the battery is assembled in the vehicle, three sides where the water flowing groove 141 is located are respectively located at the left side, the right side and the rear side of the vehicle, and moisture in the case 10 is timely discharged during the running of the vehicle.

By adopting the above technical scheme, the bottom guard plate 14 can strengthen the intensity of the bottom of the box 10, and the water in the box 10 can be led out by the water flowing groove 141, so that the performance of the battery is prevented from being influenced by the water.

According to some embodiments of the present application, there is further provided a battery 100, including the case 10 provided in any of the above embodiments, and the battery cell 20, where the battery cell 20 is accommodated in the case 10.

The battery 100 includes the case 10 provided in any of the above embodiments, and has the same advantageous effects as the case 10. In addition, the box 10 has a good heat preservation effect, so that the heating frequency of the battery under a low-temperature working condition is reduced, natural air cooling convection is avoided, and the effective endurance mileage of the existing energy is improved under the condition of not consuming energy. The case 10 can provide a constant temperature-like condition for the battery, improving the life of the battery. Similarly, the case 10 can also have good heat insulation and preservation capability in a high temperature environment, and the influence of external high temperature on the performance of the battery is avoided. Therefore, the case 10 has a good heat insulation effect, which is advantageous in maintaining the stability and constancy of the operating temperature of the battery 100.

According to some embodiments of the present application, there is also provided an electrical device including the battery 100 described above, and the battery 100 is configured to provide electrical energy to the electrical device.

The powered device may be any of the aforementioned devices or systems employing batteries.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.

Claims (16)

1. A case for a battery, the case comprising:

the box body is internally provided with an accommodating space;

a thermal insulation coating disposed on at least one surface of the tank body;

wherein, the case body includes the bottom plate, at least one side of bottom plate is equipped with the heat preservation coating.

2. The cabinet of claim 1, wherein a surface of said bottom plate facing away from said receiving space is coated with said thermal insulation coating.

3. A cabinet according to claim 2, wherein the bottom plate is a heat exchanger plate containing a heat exchanger medium.

4. A cabinet according to claim 3, wherein the surface of the bottom plate facing away from the accommodation space is provided with flow passage protrusions, and the heat-insulating coating covers the flow passage protrusions and gaps between the flow passage protrusions.

5. The cabinet of claim 1, wherein said cabinet body further comprises a side panel disposed around an edge of said floor panel, said side panel comprising oppositely disposed inner and outer surfaces, said inner surface disposed toward said receiving space;

at least one of the inner surface and the outer surface is provided with the heat-insulating coating.

6. The cabinet of any one of claims 1-5, wherein the insulation coating is an aerogel coating.

7. The cabinet of claim 1, wherein the insulating coating has a thickness of 0.5mm to 2.5mm.

8. The cabinet of claim 1, wherein the thermal conductivity of the thermal barrier coating is less than 0.05W/Mk.

9. The case of claim 5, further comprising an impact resistant layer disposed on a surface of at least one of the bottom panel and the side panel.

10. The cabinet of claim 9, wherein the base plate is provided with the impact-resistant layer and the heat-insulating coating on a surface facing away from the accommodating space, and the impact-resistant layer is provided between the base plate and the heat-insulating coating.

11. The cabinet of claim 5, further comprising a fire-resistant coating disposed on a surface of at least one of the bottom panel and the side panels.

12. The cabinet of claim 11, wherein the fireproof coating is disposed on a surface of the bottom plate facing the accommodating space, and the thermal insulation coating is disposed on a surface of the bottom plate facing away from the accommodating space; or, the fireproof coating and the heat-insulating coating are both arranged on the surface of the bottom plate facing the accommodating space, and the fireproof coating is arranged between the bottom plate and the heat-insulating coating.

13. The cabinet of any one of claims 1-5, further comprising a bottom guard plate coupled to a bottom of the cabinet body, wherein a side of the bottom guard plate facing the cabinet body is provided with a water drain.

14. The cabinet of claim 13, wherein the number of the water flowing grooves is plural, and the water flowing grooves are respectively provided on three sides of the bottom guard plate at intervals.

15. A battery, comprising:

a cabinet according to any one of claims 1 to 14, and

and the battery monomer is accommodated in the box body.

16. An electrical device comprising a battery as claimed in claim 15 for providing electrical energy.

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