CN221041398U

CN221041398U - Box, battery and electric equipment

Info

Publication number: CN221041398U
Application number: CN202420458246.2U
Authority: CN
Inventors: 方海舟; 高士会
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2024-03-11
Filing date: 2024-03-11
Publication date: 2024-05-28
Anticipated expiration: 2034-03-11

Abstract

The application discloses a box body, a battery and electric equipment, wherein the box body comprises a bottom plate, a plurality of reinforcing plates and a plurality of heat insulation plates, the bottom plate is provided with a first surface and a second surface which are oppositely arranged along the thickness direction of the bottom plate, and the first surface is used for bearing a battery monomer; the plurality of reinforcing plates are arranged on the second surface; the plurality of heat insulating plates are arranged on the second surface, the plurality of reinforcing plates and the plurality of heat insulating plates are alternately arranged along the first direction, the first direction is perpendicular to the thickness direction of the bottom plate, and the box body can improve the reliability of the battery.

Description

Box, battery and electric equipment

Technical Field

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

Background

Along with the development of new energy technology, the application of the battery is more and more extensive, the battery has higher energy density, higher safety, long service life and environmental protection to the social environment, and the battery has been widely applied to the aspects of passenger cars, commercial vehicles, electric bicycles, heavy trucks, energy storage facilities, power stations, engineering manufacture, intelligent appliances and the like, and simultaneously promotes the technical development and research of communication terminals, medical appliances, energy development and the like.

In the development process of battery technology, how to improve the reliability of the battery is a technical problem to be solved.

Disclosure of utility model

The embodiment of the application provides a box, a battery and electric equipment, which can ensure the reliability of the battery.

In a first aspect, an embodiment of the present application provides a box, including a base plate, a plurality of reinforcing plates, and a plurality of heat insulation plates; the bottom plate is provided with a first surface and a second surface which are oppositely arranged along the thickness direction of the bottom plate, and the first surface is used for bearing the battery cells; the plurality of reinforcing plates are arranged on the second surface; the plurality of heat insulation plates are arranged on the second surface, the plurality of reinforcing plates and the plurality of heat insulation plates are alternately arranged along a first direction, and the first direction is perpendicular to the thickness direction of the bottom plate.

Among the above-mentioned technical scheme, through setting up reinforcing plate and heat insulating board at the second surface, the reinforcing plate can support the bottom plate, reduces the bottom plate risk of warping, improves the planarization of bottom plate to reduce the colloid quantity of battery monomer bonding and bottom plate, reduce the colloid and spill over the risk of penetrating battery monomer shell after solidifying, improve battery reliability. The heat insulating plate can reduce or block heat exchange between the battery monomer and the external environment, reduce the influence of external low temperature on the battery monomer, and improve the reliability of the battery. The reinforcing plates and the heat insulation plates are alternately arranged along the first direction, so that the reinforcing plates and the heat insulation plates are uniformly distributed, the bottom plate can be uniformly supported by the reinforcing plates, and the heat insulation plates can be uniformly insulated.

In some embodiments, the reinforcing plate is a metal plate and the insulating plate is a non-metal plate.

In the technical scheme, the reinforcing plate is a metal plate, and the metal plate has higher structural strength and can further improve the planeness of the bottom plate. The heat insulating plate is a nonmetal plate, and the nonmetal plate can improve the heat insulating performance of the heat insulating plate.

In some embodiments, the reinforcing plate is a honeycomb aluminum plate.

In the technical scheme, the honeycomb aluminum plate has light weight, higher strength and rigidity, excellent compression resistance and capability of effectively supporting the bottom plate and improving the plane plate of the bottom plate, so that the reliability and the energy density of the battery are considered. Meanwhile, an air gap is formed in the honeycomb aluminum plate, the honeycomb aluminum plate has heat insulation, heat transfer between the outside and the battery monomer can be reduced, and the influence of low temperature outside on the battery monomer is reduced.

In some embodiments, the reinforcing plate includes a first plate body, a second plate body, and a third plate body that are stacked, the second plate body is disposed between the first plate body and the third plate body, the second plate body is provided with a plurality of first through holes, and each of the first through holes penetrates through the second plate body in a thickness direction of the second plate body.

In the technical scheme, the reinforcing plate is a composite plate formed by laminating the first plate body, the second plate body and the third plate body, so that the preparation difficulty of the reinforcing plate is reduced to a certain extent. The second plate body is provided with first through-hole, and first through-hole can reduce the quality of second plate body to a certain extent.

In some embodiments, the reinforcing plate has third and fourth surfaces disposed opposite each other in a thickness direction thereof, the heat insulating plate has fifth and sixth surfaces disposed opposite each other in the thickness direction thereof, the third surface being coplanar with the fifth surface, and the fourth surface being coplanar with the sixth surface.

In the above technical solution, the third surface and the fifth surface are coplanar to improve the flatness of the side, and the fourth surface and the sixth surface are coplanar to improve the flatness of the side, so as to improve the flatness of the bottom plate.

In some embodiments, the first plate has a thickness H ₁, which is 0.25mm < H ₁ < 2mm; and/or the thickness of the second plate body is H ₂, which is more than or equal to 0.25mm and less than or equal to H ₂ and less than or equal to 2mm.

In the technical scheme, H ₁ is less than or equal to 0.25mm, the first plate body is not too thin, and the first plate body is not easy to deform, so that the structural strength and the planeness of the reinforcing plate are improved. H ₁ is less than or equal to 2mm, the first plate body is not too thick, and the quality of the first plate body is controlled, so that the quality of the reinforcing plate is controlled, and the quality energy density of a battery using the box body is improved. Therefore, H ₁ which is more than or equal to 0.25mm and less than or equal to 2mm can give consideration to the strength and the quality of the reinforcing plate. H ₂ is less than or equal to 0.25mm, the second plate body is not too thin, the second plate body is not easy to deform, and the structural strength and the flatness of the reinforcing plate are improved. H ₁ is less than or equal to 2mm, and the second plate body is not too thick, so that the quality of the second plate body is controlled, the quality of the reinforcing plate is controlled, and the quality energy density of a battery using the box body is improved. Therefore, H ₂ which is more than or equal to 0.25mm and less than or equal to 2mm can give consideration to the strength and the quality of the reinforcing plate.

In some embodiments, the sum of the projected areas of the plurality of reinforcing plates is smaller than the sum of the projected areas of the plurality of heat insulating plates in the thickness direction of the base plate.

In the technical scheme, the sum of the projection areas of the reinforcing plates is smaller than the sum of the projection areas of the heat insulation plates, so that the heat insulation area is larger than the reinforcing area, and the heat insulation performance can be improved.

In some embodiments, the reinforcing plate is bonded to the base plate and the insulating plate is bonded to the base plate.

In the technical scheme, the reinforcing plate is bonded with the bottom plate, so that the connection difficulty of the reinforcing plate and the bottom plate is reduced. The heat insulating plate is adhered to the bottom plate, so that the connection difficulty of the heat insulating plate and the bottom plate is reduced.

In some embodiments, the box further comprises a bottom guard plate connected to the bottom plate, and the reinforcing plate and the heat insulating plate are disposed between the bottom plate and the bottom guard plate.

In the technical scheme, the bottom guard plate is arranged on the outer layer of the box body and can directly bear impact from the outside, so that the battery ball striking standard can be improved.

In some embodiments, the material of the insulating panel is foamed polypropylene.

In the technical scheme, the foaming polypropylene has high temperature resistance and external pressure resistance, and is beneficial to improving the structural strength and the heat insulation of the heat insulation plate.

In some embodiments, the dimension of the bottom plate in the first direction is smaller than the dimension of the bottom plate in the second direction, and the first direction, the second direction and the thickness direction of the bottom plate are perpendicular to each other.

In the above-mentioned technical scheme, the atress that the reinforcing plate can be better to supporting bottom plate, supporting battery monomer reduces the bottom plate risk of warping.

In a second aspect, an embodiment of the present application further provides a battery, where the battery includes a battery monomer and the case provided in any embodiment of the first aspect, and the battery monomer is disposed in the case.

In some embodiments, the battery cell is adhesively bonded to the first surface.

In a third aspect, an embodiment of the present application provides an electric device, where the electric device includes a battery provided in any embodiment of the second aspect, and the battery is used to supply power to the electric device.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the application;

FIG. 2 is an exploded view of a battery according to some embodiments of the present application;

FIG. 3 is a schematic view of a box according to some embodiments of the present application;

FIG. 4 is an exploded view of a case according to some embodiments of the present application;

FIG. 5 is a partial cross-sectional view of a tank of some embodiments of the present application along the XZ plane;

FIG. 6 is an enlarged view of portion A of FIG. 5;

FIG. 7 is an exploded view of a reinforcing plate according to some embodiments of the present application;

fig. 8 is a partial cross-sectional view of a reinforcing plate in accordance with some embodiments of the present application.

Icon:

1000-vehicle; 200-motor; 300-a controller; 100-cell; 10-battery cell; 20-a box body; 21-a bottom plate; 211-body; 2111-a first surface; 2112-a second surface; 212-a frame; 2121-connecting holes; s ₁ -a first end; s ₂ -a second end; 22-reinforcing plates; 220-honeycomb aluminum plate; 221-a first plate body; 2211-a third surface; 222-a second plate; 2221-first via; 223-a third plate; 2231-a fourth surface; 23-insulating board; 231-fifth surface; 232-sixth surface; 24-bottom guard board; 241-through holes; 26-accommodation space; 27-sidewalls; z-thickness direction; x-a first direction; y-a second direction;

The figures are not drawn to scale.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the 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 in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

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

The term "and/or" in the present application is merely an association relation describing the association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In the present application, the character "/" generally indicates that the front and rear related objects are an or relationship.

In the embodiments of the present application, the same reference numerals denote the same components, and detailed descriptions of the same components are omitted in different embodiments for the sake of brevity. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are merely illustrative and should not be construed as limiting the application in any way.

The term "plurality" as used herein refers to two or more (including two).

In the present application, the battery cell may include, but is not limited to, a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like. The battery cells include, but are not limited to, cylinders, flat bodies, rectangular solids, or other shapes, etc. The battery cells generally comprise cylindrical battery cells, square battery cells, soft package battery cells and the like in a packaging mode.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly consists of a positive plate, a negative plate and a separation membrane. The battery cell mainly relies on metal ions moving between the positive and negative electrode plates, with metal ions (e.g., lithium ions) being inserted and extracted back and forth between the positive and negative electrodes. The isolating film is arranged between the positive electrode and the negative electrode, can play a role in preventing the short circuit of the positive electrode plate and the negative electrode plate, and can enable active ions to pass through.

The positive plate comprises a positive electrode current collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on the surface of the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protrudes out of the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer is used as a positive electrode lug.

Taking a lithium ion battery as an example, the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The positive current collector may be a metal foil or a composite current collector. For example, as the metal foil, surface-silver-treated aluminum, surface-silver-treated stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, titanium, or the like can be used. The composite current collector may include a polymeric material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel alloy, titanium alloy, silver alloy, etc.) on a polymer material substrate (e.g., a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

The negative electrode sheet comprises a negative electrode current collector and a negative electrode active material layer, wherein the negative electrode active material layer is coated on the surface of the negative electrode current collector, the negative electrode current collector without the negative electrode active material layer protrudes out of the negative electrode current collector coated with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer is used as a negative electrode tab.

The negative electrode current collector can be a metal foil or a composite current collector. For example, as the metal foil, surface-silver-treated aluminum, surface-silver-treated stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, titanium, or the like can be used. The negative electrode active material may be carbon, silicon, or the like.

In order to ensure that the high current is passed without fusing, the number of positive electrode lugs is multiple and stacked together, and the number of negative electrode lugs is multiple and stacked together. The material of the separator may be PP (polypropylene) or PE (polyethylene). In addition, the electrode assembly may be a roll-to-roll structure or a laminate structure.

Reference to a battery in accordance with an embodiment of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, or the like. The battery generally includes a case for enclosing one or more battery cells. The case can reduce the influence of liquid or other foreign matters on the charge or discharge of the battery cells.

In some embodiments, a plurality of battery cells (cells) may be first integrated into at least one battery module, and then the battery module is mounted in a case to form a battery pack. In this embodiment, auxiliary structural members such as a cross member may be further provided between the battery modules to improve the mounting stability of the battery modules in the case.

In some embodiments, the battery may be an energy storage device. The energy storage devices include, but are not limited to, energy storage containers, energy storage electrical cabinets, and the like.

The development of battery technology is taking into consideration various design factors such as energy density, cycle life, discharge capacity, charge-discharge rate and other performance parameters, and the reliability of the battery.

In battery technology, the below of bottom plate is provided with the heat insulating board, and the heat insulating board is used for thermal-insulated to reduce outside low temperature and to the influence of battery monomer performance, although the heat insulating board can play the support of certain degree to the bottom plate, but the intensity of heat insulating board is lower, and is little to the holding power of bottom plate, and the bottom plate receives the effort of battery still to warp easily, leads to the planarization poor.

In general, the battery monomer is adhered to the bottom plate through the colloid, the flatness of the bottom plate is reduced, the use amount of the colloid is increased due to the increase of the gap between the bottom plate and the battery monomer, the colloid overflows from between the battery monomer and the bottom plate and is solidified, the shell of the battery monomer is easy to puncture, the battery monomer is short-circuited or out of control, and the reliability of the battery is reduced.

In view of this, in order to solve the problem of low flatness of the bottom plate, which results in low reliability of the battery, embodiments of the present application provide a case in which a plurality of reinforcing plates and a plurality of heat insulation plates are disposed under the bottom plate, the plurality of reinforcing plates and the plurality of heat insulation plates being alternately disposed in a first direction, the first direction being perpendicular to a thickness direction of the bottom plate. The reinforcing plate can be high in strength, the flatness of the bottom plate can be improved, the colloid consumption is reduced, the heat insulation plate has the characteristic of heat transfer, and the influence of the external low-temperature environment on the performance of the battery monomer can be reduced. Therefore, the reliability of the battery can be improved by providing the reinforcing plate and the heat insulating plate.

The technical scheme disclosed by the embodiment of the application is applicable to, but not limited to, batteries and electric equipment using the batteries.

The electric equipment can be vehicles, mobile phones, portable equipment, notebook computers, ships, spacecrafts, electric toys, electric tools and the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, and electric planers, among others.

For convenience of description, the following embodiments take the electric device as the vehicle 1000 as an example.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application, a battery 100 is disposed in the vehicle 1000, and the battery 100 may be disposed 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 300 and a motor 200, the controller 300 being configured to control the battery 100 to power the motor 200, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the 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.

In some embodiments, referring to fig. 2, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present application, and the battery 100 includes a plurality of battery cells 10 and a case 20. The plurality of battery cells 10 may be connected in series or in parallel or in series-parallel. The series-parallel connection refers to that the plurality of battery cells 10 are connected in series or in parallel.

The case 20 is used for accommodating the battery cell 10, and in some embodiments, the case 20 may include two sub-cases (not shown in the drawings), namely, a first sub-case and a second sub-case, which are respectively covered with each other to define an accommodating space 26 for accommodating the battery cell 10. Of course, the connection between the first sub-tank and the second sub-tank may be sealed by a sealing element (not shown), which may be a sealing ring, a sealant, or the like.

Of course, in other embodiments, the case 20 may be a structure with one side opened, i.e. the second sub-case is not provided, as shown in fig. 2, the second sub-case (upper case) is omitted, and only the first sub-case (lower case) is maintained.

The case 20 may have various shapes, such as a rectangular parallelepiped, a cylinder, etc. The case 20 may be a closed case 20, for example, a first sub-case is a hollow structure with one side open, and a second sub-case is a hollow structure with one side open, and the open side of the second sub-case is closed to the open side of the first sub-case, so as to form the case 20 with the accommodating space 26.

Of course, as shown in fig. 3, the case 20 may be a case 20 with one side opened, the case 20 includes a bottom plate 21 and a side wall 27 surrounding the bottom plate 21, one end of the side wall 27 is closed by the bottom plate 21, and the other end is opened, thereby forming the case 20 with the accommodating space 26. The height of the side wall 27 may be set as required, that is, the side wall 27 may be a higher wall and the side wall 27 may be a lower wall.

In some embodiments, the battery 100 may further include a bus bar (not shown), through which the plurality of battery cells 10 may be electrically connected to each other, so as to realize serial connection, parallel connection, or a series-parallel connection of the plurality of battery cells 10.

The bus member may be a metal conductor such as copper, iron, aluminum, steel, aluminum alloy, or the like.

The embodiment of the present application provides a case 20, which can solve the problem of low flatness of a bottom plate 21 of a battery 100, and a specific structure of the case 20 will be described in detail with reference to the accompanying drawings.

Fig. 3 is a schematic structural view of a case 20 according to some embodiments of the present application; FIG. 4 is an exploded view of a housing 20 according to some embodiments of the present application; FIG. 5 is a partial cross-sectional view of the housing 20 along the XZ plane in accordance with some embodiments of the present application; fig. 6 is an enlarged view of a portion a in fig. 5.

It should be noted that, in fig. 3, the case 20 is in an inverted state, and the first surface 2111 faces downward (bearing surface) in this view. In fig. 4, the case 20 is in a normal state, and the first surface 2111 faces upward in this view.

Referring to fig. 3 to 6, the case 20 according to the embodiment of the present application includes a bottom plate 21, a plurality of reinforcing plates 22, and a plurality of heat insulation plates 23. The bottom plate 21 has a first surface 2111 and a second surface 2112 disposed opposite to each other in the thickness direction Z thereof, the first surface 2111 for carrying the battery cell 10; a plurality of reinforcing plates 22 are disposed on the second surface 2112; the plurality of heat insulating plates 23 are disposed on the second surface 2112, and the plurality of reinforcing plates 22 and the plurality of heat insulating plates 23 are alternately disposed along a first direction X, which is perpendicular to a thickness direction Z of the bottom plate 21.

The first surface 2111 is a bearing surface, the first surface 2111 faces the inside of the case 20, and the battery cell 10 is adhered to the first surface 2111.

The reinforcing plate 22 is a relatively strong member, and it is understood that the reinforcing plate 22 material has a strength greater than that of the insulating plate 23 material. The reinforcing plate 22 is provided on the second surface 2112 to support the bottom plate 21, so that the risk of deformation of the bottom plate 21 is reduced, and the flatness of the bottom plate 21 is improved.

The shape of the reinforcing plate 22 includes, but is not limited to, square, rectangular, profiled, etc.

The heat shield 23 is a member separating the battery cell 10 from the external environment to prevent the heat exchange of the battery cell 10 with the external environment. The heat insulating plate 23 can reduce or block heat exchange between the battery cell 10 and the external environment. In the case where the external ambient temperature is low, the heat insulating layer can reduce the risk that the external low temperature causes the battery cell 10 to have an excessively low temperature, which affects the reliability of the battery cell 10.

The shape of the heat shield 23 includes, but is not limited to, square, rectangular, profiled, etc.

Alternatively, as shown in fig. 3 and 4, both the reinforcing plate 22 and the heat insulating plate 23 are constructed in a rectangular shape.

The plurality of reinforcing plates 22 and the plurality of heat insulation plates 23 are alternately arranged along the first direction X, that is, the reinforcing plates 22 and the heat insulation plates 23 are alternately arranged along the first direction X, that is, the heat insulation plates 23 are arranged between two adjacent reinforcing plates 22, and the reinforcing plates 22 are arranged between two adjacent heat insulation plates 23.

The number of the heat insulating plates 23 and the reinforcing plates 22 may be two, three, four, etc., as required. The number of heat shields 23 may be the same as or different from the number of reinforcing plates 22. Illustratively, in fig. 3 and 4, the number of heat shields 23 is four, and the number of reinforcing plates 22 is three.

Through setting up reinforcing plate 22 and heat insulating board 23 at second surface 2112, reinforcing plate 22 can support bottom plate 21, reduces bottom plate 21 and warp the risk, improves the planarization of bottom plate 21 to reduce the colloid quantity of battery cell 10 bonding and bottom plate 21, reduce the colloid and spill over the risk of penetrating the battery cell 10 shell after solidifying, improve battery 100 reliability. The heat shield 23 can reduce or block heat exchange between the battery cell 10 and the external environment, reduce the influence of external low temperature on the battery cell 10, and improve the reliability of the battery 100. The plurality of reinforcing plates 22 and the plurality of heat insulation plates 23 are alternately arranged in the first direction X such that the reinforcing plates 22 and the heat insulation plates 23 are uniformly arranged, and thus the reinforcing plates 22 can uniformly support the bottom plate 21 and the heat insulation plates 23 can uniformly insulate heat.

In some embodiments, the material of the stiffener 22 is PP honeycomb.

In other embodiments of the stiffener 22, the stiffener 22 may not be a PP honeycomb. In some embodiments, the reinforcing plate 22 is a metal plate and the insulating plate 23 is a non-metal plate.

The reinforcing plate 22 is a metal plate having high structural strength, and can further improve the flatness of the bottom plate 21.

The heat insulating plate 23 is a non-metal plate having a low heat conductivity coefficient so as to have a good heat insulating property.

In some embodiments, the reinforcing plate 22 is a honeycomb aluminum plate 220 (as shown).

Compared with the PP honeycomb plate, the honeycomb aluminum plate 220 is low in price and beneficial to control of cost. Meanwhile, the honeycomb aluminum plate 220 has light weight, high strength and rigidity, excellent compression resistance, and can effectively support the bottom plate 21 and improve the plane plate of the bottom plate 21, so that the reliability and the energy density of the battery 100 are both considered. Meanwhile, the air gap is formed in the honeycomb aluminum plate 220, the honeycomb aluminum plate 220 has heat insulation, heat transfer between the outside and the battery cell 10 can be reduced, and influence of low temperature outside on the battery cell 10 is reduced.

In addition, the aluminum honeycomb panel 220 has good flame retardant property, and the aluminum honeycomb panel 220 generally adopts an aluminum panel, an aluminum alloy panel or a non-inflammable material panel as a covering layer on the surface, so that the aluminum honeycomb panel 220 has good high temperature resistance and can effectively prevent fire spreading.

In addition, the honeycomb aluminum plate 220 is easy to process, is convenient to mold, cut and process, and is suitable for various process requirements.

Fig. 7 is an exploded view of a reinforcing plate 22 according to some embodiments of the present application.

Referring to fig. 7, in some embodiments, the reinforcement plate 22 includes a first plate body 221, a second plate body 222, and a third plate body 223 that are stacked, the second plate body 222 is disposed between the first plate body 221 and the third plate body 223, the second plate body 222 is provided with a plurality of first through holes 2221, and each of the first through holes 2221 penetrates the second plate body 222 in a thickness direction Z of the second plate body 222.

It is to be understood that the reinforcing plate 22 is a plate material formed by disposing the first plate body 221 on both sides of the thickness direction Z of the second plate body 222 and covering the first through holes 2221. The reinforcing plate 22 is a composite plate formed by stacking a plurality of plate layers, the second plate body 222 is a core material of the reinforcing plate 22, and the first plate body 221 and the third plate body 223 are panels of the reinforcing plate 22.

The first, second and third plate bodies 221, 222 and 223 may be made of the same material, and the first, second and third plate bodies 221, 222 and 223 may be connected by bonding or the like.

The shape of the first through hole 2221 includes, but is not limited to, circular, rectangular, and the like. In an embodiment in which the reinforcing plate 22 is a honeycomb plate, the first through holes 2221 are honeycomb holes. As shown in fig. 7, the first through hole 2221 is in a hexagonal shape, the first plate 221 is disposed on a side of the second plate 222 facing the bottom plate 21, and the third plate 223 is disposed on a side of the second plate 222 facing away from the bottom plate 21.

To further reduce the mass of the reinforcing plate 22, increase the duty ratio of the battery cells 10 per unit mass, and increase the energy density of the battery 100, in some embodiments, the first plate 221 and the third plate 223 may be made of a plate having a smaller thickness, and the second plate 222 may be made of a plate having a larger thickness, i.e., the second plate 222 has a larger thickness than the first plate 221, and the second plate 222 has a larger thickness than the third plate 223.

Wherein, the structures of the first plate 221 and the third plate 223 may be identical, thereby reducing the number of the types of the plates and improving the production efficiency.

In this embodiment, the reinforcing plate 22 is a composite plate formed by stacking the first plate 221, the second plate 222 and the third plate 223, so that the difficulty in manufacturing the reinforcing plate 22 is reduced to a certain extent. The second plate body 222 is provided with a first through hole 2221, and the first through hole 2221 can reduce the mass of the second plate body 222 to some extent.

To improve the planarity of the surface of the stiffener 22, referring to fig. 7, in some embodiments the first plate 221 is a flat plate and the third plate 223 is a flat plate. In this way, the first plate body 221 and the second plate body 222 can improve the flatness of the surface of the reinforcing plate 22, thereby improving the flatness of the bottom plate 21.

Referring to fig. 6 in combination with fig. 7, in some embodiments, the reinforcing plate 22 has a third surface 2211 and a fourth surface 2231 disposed opposite each other in a thickness direction Z thereof, the insulating plate 23 has a fifth surface 231 and a sixth surface 232 disposed opposite each other in the thickness direction Z thereof, the third surface 2211 is coplanar with the fifth surface 231, and the fourth surface 2231 is coplanar with the sixth surface 232.

It is appreciated that the third surface 2211 is on the same side as the fifth surface 231, and the fourth surface 2231 and the sixth surface 232 are on the same side.

Illustratively, as shown in FIG. 6, the third surface 2211 and the fifth surface 231 face the base plate 21, the third surface 2211 and the fifth surface 231 are coplanar, the fourth surface 2231 and the sixth surface 232 face away from the base plate 21, and the fourth surface 2231 and the sixth surface 232 are coplanar.

Illustratively, as shown in fig. 7, in the case where the reinforcing plate 22 includes the first plate body 221, the second plate body 222, and the third plate body 223 that are stacked, a surface of the first plate body 221 facing the bottom plate 21 is a third surface 2211, and a surface of the third plate body 223 facing away from the bottom plate 21 is a fourth surface 2231.

Coplanarity of the third surface 2211 with the fifth surface 231 can improve the flatness of the side, and coplanarity of the fourth surface 2231 with the sixth surface 232 can improve the flatness of the side, thereby improving the flatness of the bottom plate 21.

Fig. 8 is a partial cross-sectional view of a reinforcing plate 22 according to some embodiments of the present application.

Referring to FIG. 8, in some embodiments, the first plate 221 has a thickness H ₁, satisfying 0.25mm < H ₁ < 2mm.

The thickness of the first plate 221 refers to the distance between the third surface 2211 and the fourth surface 2231. If the third surface 2211 has protrusions or grooves, the distance between the third surface 2211 and the fourth surface 2231, i.e., the thickness of the first plate 221, is measured with the surface other than the protrusions or grooves as a reference surface. If the fourth surface 2231 has protrusions or grooves, the distance between the fourth surface 2231 and the third surface 2211, i.e., the thickness of the first plate 221, is measured with the surface other than the protrusions or grooves as a reference surface.

By way of example, H ₁ may be 0.25mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.9mm, 1mm, 1.2mm, 1.4mm, 1.7mm, 1.8mm, 1.9mm, 2mm, and any number therebetween.

H ₁ is less than or equal to 0.25mm, the first plate body 221 cannot be too thin, the first plate body 221 is not easy to deform, and the structural strength and the flatness of the reinforcing plate 22 are improved. H ₁ is less than or equal to 2mm, and the first plate 221 is not too thick, so that the quality of the first plate 221 is controlled, and the quality of the reinforcing plate 22 is controlled, so that the quality energy density of the battery 100 using the case 20 is improved. Therefore, 0.25 mm.ltoreq.H ₁.ltoreq.2 mm can give consideration to both the strength and the quality of the reinforcing plate 22.

In some embodiments, the thickness of the second plate 222 is H ₂, satisfying 0.25mm < H ₂ < 2mm.

The thickness of the second plate 222 refers to the distance between the fifth surface 231 and the sixth surface 232. If the fifth surface 231 has a protrusion or a groove, the distance between the fifth surface 231 and the sixth surface 232, i.e. the thickness of the second plate 222, is measured with the surface outside the protrusion or the groove as the reference surface. If the sixth surface 232 has a protrusion or a groove, the distance between the sixth surface 232 and the fifth surface 231, i.e. the thickness of the second plate 222, is measured with the surface outside the protrusion or the groove as the reference surface.

By way of example, H ₂ may be 0.25mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.9mm, 1mm, 1.2mm, 1.4mm, 1.7mm, 1.8mm, 1.9mm, 2mm, and any number therebetween.

H ₂ is less than or equal to 0.25mm, the second plate body 222 cannot be too thin, the second plate body 222 is not easy to deform, and the structural strength and the flatness of the reinforcing plate 22 are improved. H ₁ is less than or equal to 2mm, and the second plate 222 is not too thick, which is advantageous in controlling the mass of the second plate 222, thereby controlling the mass of the reinforcing plate 22, and improving the mass energy density of the battery 100 using the case 20. Therefore, 0.25 mm.ltoreq.H ₂.ltoreq.2 mm can give consideration to both the strength and the quality of the reinforcing plate 22.

In some embodiments, the sum of the projected areas of the plurality of reinforcing plates 22 is smaller than the sum of the projected areas of the plurality of insulating plates 23 in the thickness direction Z of the bottom plate 21.

The sum of the projection areas of the plurality of reinforcing plates 22 means that the projection areas of the plurality of reinforcing plates 22 are added. The sum of the projected areas of the plurality of heat shields 23 means that the projected areas of the plurality of heat shields 23 are added together. Illustratively, in fig. 3 and 4, the number of reinforcing plates 22 is three, and the projected areas of the three reinforcing plates 22 are added to the sum of the projected areas of the reinforcing plates 22. The number of the heat shields 23 is four, and the sum of the projected areas of the four heat shields 23 is the sum of the projected areas of the heat shields 23. The sum of the projected areas of the three reinforcing plates 22 is smaller than the sum of the projected areas of the four heat insulating plates 23.

It should be noted that, along the thickness direction Z of the bottom plate 21, the sum of the projected areas of the plurality of reinforcing plates 22 is smaller than the sum of the projected areas of the plurality of heat insulating plates 23, which does not require that the projected area of the single reinforcing plate 22 is smaller than the projected area of the single heat insulating plate 23. Specifically, if the number of reinforcing plates 22 is smaller than the number of heat insulating plates 23, the projected area of a single reinforcing plate 22 may be larger than the projected area of a single heat insulating plate 23. If the number of the reinforcing plates 22 is equal to the number of the heat insulation plates 23, the projected area of the single reinforcing plate 22 needs to be smaller than the projected area of the single heat insulation plate 23.

The sum of the projected areas of the plurality of reinforcing plates 22 is smaller than the sum of the projected areas of the plurality of heat insulating plates 23, so that the heat insulating area is larger than the reinforcing area, and the heat insulating performance can be improved.

Alternatively, the number of reinforcing plates 22 is smaller than the number of heat insulating plates 23, and the projected area of each reinforcing plate 22 is smaller than the projected area of each heat insulating plate 23 in the thickness direction Z of the base plate 21.

Referring to FIG. 3, optionally, the bottom plate 21 has a first end S ₁ and a second end S ₂ opposite to each other along a first direction X, and after the plurality of reinforcing plates 22 and the plurality of insulating plates 23 are alternately arranged along the first direction X, the first end S ₁ to the second end S ₂ are sequentially 1 st to N th plates, wherein the 1 st plate and the N th plate are the insulating plates 23, N is an even number, and N is equal to or greater than 4.

It will be appreciated that in this embodiment, the plate body near the first end S ₁ and the plate body near the second end S ₂ are both heat insulation plates 23, and along the first direction X, all the reinforcing plates 22 are between the two heat insulation plates 23.

Compared with the middle part, the first end S ₁ and the second end S ₂ are closer to the external environment of the battery 100, so that the first plate and the N plate are arranged as the heat insulation plates 23, the external environment is resisted, the heat insulation effect is improved, the influence of external low temperature on the battery cell 10 is further reduced, and the reliability of the battery 100 is improved.

In some embodiments, the reinforcing plate 22 is bonded to the base plate 21 and the insulating plate 23 is bonded to the base plate 21.

The reinforcing plate 22 and the bottom plate 21 may be bonded by double-sided adhesive tape. The heat insulating plate 23 and the bottom plate 21 may be adhered by double-sided adhesive tape.

The reinforcing plate 22 is adhered to the bottom plate 21, so that the connection difficulty between the reinforcing plate 22 and the bottom plate 21 is reduced. The heat insulating plate 23 is adhered to the bottom plate 21, so that the connection difficulty of the heat insulating plate 23 and the bottom plate 21 is reduced.

Referring to fig. 4, in some embodiments, the housing 20 further includes a bottom shield 24, the bottom shield 24 being coupled to the bottom plate 21, and the reinforcement plate 22 and the heat shield 23 being disposed between the bottom plate 21 and the bottom shield 24.

It will be appreciated that the reinforcing plate 22 and the insulating plate 23 are sandwiched between the base plate 21 and the bottom guard plate 24.

The bottom guard 24 is adapted to the shape of the bottom plate 21. The bottom guard plate 24 may be made of aluminum or aluminum alloy.

The bottom guard 24 is directly exposed to external impact from outside the case 20, and can improve the impact standard of the battery 100.

Referring to fig. 3, in some embodiments, the base plate 21 includes a body 211 and a frame 212, and the frame 212 is disposed around the outer periphery of the body 211 to improve the stability of the base plate 21.

Referring to fig. 4, in some embodiments, the bottom plate 21 is provided with a coupling hole 2121, the bottom guard plate 24 is provided with a through hole 241 corresponding to the coupling hole 2121, and the bottom guard plate 24 is coupled to the bottom plate 21 by a locking member penetrating the bottom guard plate 24 and the coupling hole 2121. The locking elements include, but are not limited to, bolts, screws, and the like.

In some embodiments, the insulating panel 23 may be a sheet material such as polystyrene board.

In some embodiments, the material of the heat insulation plate 23 is foamed polypropylene, and the foamed polypropylene has high temperature resistance and external pressure resistance, so that the structural strength and heat insulation property of the heat insulation plate 23 are improved.

In some embodiments, the housing 20 may further include a module mounting beam (not shown) mounted to the first surface 2111, the module mounting beam dividing the module into a plurality of load bearing regions. Optionally, the number of module mounting beams is one to divide the first surface 2111 into two load bearing areas. The plurality of reinforcing plates 22 and the plurality of heat insulating plates 23 are alternately arranged in the first direction X to form a group. In the second direction Y, two sets of reinforcing plates 22 and heat insulating plates 23 are provided so as to correspond to the two bearing areas, respectively.

Referring to fig. 3 and 4, in some implementations, the dimension of the base plate 21 in the first direction X is smaller than the dimension of the base plate 21 in the second direction Y, and the first direction X, the second direction Y, and the thickness direction Z of the base plate 21 are perpendicular to each other.

Illustratively, in fig. 3 and 4, the shape of the bottom plate 21 is approximately rectangular, the length direction of the bottom plate 21 is parallel to the first direction X, and the width direction of the bottom plate 21 is parallel to the second direction Y. The direction of the alternate arrangement of the plurality of reinforcing plates 22 and the plurality of heat insulating plates 23 is parallel to the width direction of the bottom plate 21, and the direction of the alternate arrangement of the plurality of reinforcing plates 22 and the plurality of heat insulating plates 23 is perpendicular to the second direction Y.

The plurality of battery cells 10 are arranged along the length direction of the box 20 in sequence, so that the alternating arrangement direction of the plurality of reinforcing plates 22 and the plurality of heat insulation plates 23 is perpendicular to the length direction of the box 20, and the reinforcing plates 22 can bear better force, so that the bottom plate 21 is supported, the battery cells 10 are supported, and the deformation risk of the bottom plate 21 is reduced.

The embodiment of the application further provides a battery 100, where the battery 100 includes a battery unit 10 and the case 20 provided in any of the foregoing embodiments, and the battery unit 10 is disposed in the case 20.

In some embodiments, the battery cell 10 is adhesively bonded to the first surface 2111. The gel can improve the connection stability between the battery cell 10 and the bottom plate 21.

The gel may be a structural gel.

The embodiment of the application also provides electric equipment, which comprises the battery 100 provided by any embodiment, wherein the battery 100 is used for supplying power to the electric equipment.

The embodiment of the application also provides a box 20, wherein the box 20 comprises a bottom plate 21, a plurality of reinforcing plates 22, a plurality of heat insulation plates 23 and a bottom guard plate 24. The bottom guard plate 24 is attached to the bottom plate 21, and the reinforcing plate 22 and the heat insulating plate 23 are disposed between the bottom plate 21 and the bottom guard plate 24. The bottom plate 21 has a first surface 2111 and a second surface 2112 disposed opposite to each other in the thickness direction Z thereof, the first surface 2111 being for carrying the battery cell 10. A plurality of reinforcing plates 22 are provided on the second surface 2112. The plurality of heat insulating plates 23 are disposed on the second surface 2112, and the plurality of reinforcing plates 22 and the plurality of heat insulating plates 23 are alternately disposed along a first direction X, which is perpendicular to a thickness direction Z of the bottom plate 21. The reinforcing plate 22 is a honeycomb aluminum plate 220, and the heat insulating plate 23 is made of foamed polypropylene. The reinforcing plate 22 includes a first plate body 221, a second plate body 222, and a third plate body 223 that are stacked, the second plate body 222 is disposed between the first plate body 221 and the third plate body 223, the second plate body 222 is provided with a plurality of first through holes 2221, and each of the first through holes 2221 penetrates the second plate body 222 in a thickness direction Z of the second plate body 222. The reinforcing plate 22 has a third surface 2211 and a fourth surface 2231 disposed opposite to each other in the thickness direction Z thereof, the heat insulating plate 23 has a fifth surface 231 and a sixth surface 232 disposed opposite to each other in the thickness direction Z thereof, the third surface 2211 is coplanar with the fifth surface 231, and the fourth surface 2231 is coplanar with the sixth surface 232. The reinforcing plate 22 is bonded to the bottom plate 21, and the heat insulating plate 23 is bonded to the bottom plate 21.

It should be noted that, without conflict, features of different embodiments of the present application may be combined with each other.

The above embodiments are only for illustrating the technical solution of the present application, and are not intended to limit the present application, and various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A tank, comprising:

a bottom plate having a first surface and a second surface disposed opposite to each other in a thickness direction thereof, the first surface being for carrying a battery cell;

a plurality of reinforcing plates arranged on the second surface;

The heat insulation plates are arranged on the second surface, the reinforcing plates and the heat insulation plates are alternately arranged along a first direction, and the first direction is perpendicular to the thickness direction of the bottom plate.

2. The cabinet of claim 1, wherein the reinforcement plate is a metal plate and the heat shield is a non-metal plate.

3. The cabinet of claim 2, wherein said reinforcing plate is a honeycomb aluminum plate.

4. The case according to claim 1, wherein the reinforcing plate includes a first plate body, a second plate body, and a third plate body that are stacked, the second plate body is disposed between the first plate body and the third plate body, the second plate body is provided with a plurality of first through holes, and each of the first through holes penetrates the second plate body in a thickness direction of the second plate body.

5. The cabinet of claim 4, wherein said reinforcement panel has third and fourth surfaces disposed opposite each other in a thickness direction thereof, said heat shield has fifth and sixth surfaces disposed opposite each other in a thickness direction thereof, said third surface being coplanar with said fifth surface, and said fourth surface being coplanar with said sixth surface.

6. The cabinet of claim 4 or 5, wherein the first plate has a thickness H ₁, satisfying 0.25mm ∈h ₁ ∈2mm; and/or the number of the groups of groups,

The thickness of the second plate body is H ₂, and H ₂ is more than or equal to 0.25mm and less than or equal to 2mm.

7. The cabinet of any one of claims 1 to 5, wherein a sum of projected areas of the plurality of reinforcing plates is smaller than a sum of projected areas of the plurality of heat insulating plates in a thickness direction of the bottom plate.

8. The cabinet of any one of claims 1-5, wherein said reinforcement panel is bonded to said floor, and said insulation panel is bonded to said floor.

9. The case according to any one of claims 1 to 5, further comprising:

And the bottom guard plate is connected to the bottom plate, and the reinforcing plate and the heat insulation plate are arranged between the bottom plate and the bottom guard plate.

10. The cabinet according to any one of claims 1 to 5, wherein the heat insulating plate is made of foamed polypropylene.

11. The cabinet of any one of claims 1-5, wherein a dimension of the bottom plate in the first direction is smaller than a dimension of the bottom plate in the second direction, and the first direction, the second direction, and a thickness direction of the bottom plate are perpendicular to each other.

12. A battery, comprising:

a battery cell;

The case of any one of claims 1-11, wherein the battery cell is disposed within the case.

13. The battery of claim 12, wherein the battery cells are adhesively bonded to the first surface.

14. A powered device comprising the battery of claim 12 or 13, the battery being configured to power the powered device.