CN115207550A

CN115207550A - Battery box, battery and electric equipment

Info

Publication number: CN115207550A
Application number: CN202211106995.0A
Authority: CN
Inventors: 沈升; 刘瑞堤; 王勇
Original assignee: Contemporary Amperex Technology Co Ltd; Jiangsu Contemporary Amperex Technology Ltd
Current assignee: Contemporary Amperex Technology Co Ltd; Jiangsu Contemporary Amperex Technology Ltd
Priority date: 2022-09-13
Filing date: 2022-09-13
Publication date: 2022-10-18

Abstract

The application provides a battery box and battery and consumer. A first aspect of the present application provides a battery case, the battery case including: a box body; the heat exchange plate is arranged at the bottom of the box body; the heat preservation piece covers the outer wall of the heat exchange plate, and the outer wall of the heat preservation piece forms the outer wall of the battery box body. The application provides a battery box compromises the guard plate's guard action through the piece that keeps warm to need not set up the guard plate at the outer wall of the piece that keeps warm, with this spare part quantity that reduces the battery box, reduce the weight of battery box, with this energy density who improves the battery box, and improve the thermal insulation performance of battery box, can also promote the shock resistance of battery bottom half through the thickness that increases the piece that keeps warm.

Description

Battery box, battery and electric equipment

Technical Field

The embodiment of the application relates to the technical field of energy storage, in particular to a battery box body, a battery and electric equipment.

Background

In the prior art, the number of parts of the battery box body to be assembled is large, the requirement on assembly precision of a plurality of parts in the assembly process is high, the assembly process is complex, the assembly tolerance formed after the assembly is completed is large, and the assembly of the plurality of parts forms a plurality of assembly surfaces, so that the failure risk of the assembly surfaces is increased.

Disclosure of Invention

In view of above-mentioned problem, this application embodiment provides a battery box and battery and consumer, and the battery box compromises the guard action of guard plate through the heat preservation piece to need not set up the guard plate at the outer wall of heat preservation piece, with this spare part quantity that reduces the battery box, reduce the weight of battery box, with this energy density who improves the battery box, and improve the thermal insulation performance of battery box, can also promote the shock resistance of battery bottom of the box through the thickness that increases the heat preservation piece.

A first aspect of the present application provides a battery case, the battery case including: a box body; the heat exchange plate is arranged at the bottom of the box body; the heat preservation piece covers the outer wall of the heat exchange plate, and the outer wall of the heat preservation piece forms the outer wall of the battery box body.

The application provides a battery box compromises the guard plate's guard action through the piece that keeps warm to need not set up the guard plate at the outer wall of the piece that keeps warm, with this spare part quantity that reduces the battery box, and simultaneously, the low density of the piece that keeps warm can also reduce the weight of battery box, with this energy density who improves the battery box, the thermal insulation performance that the thermal insulation stronger can also improve the battery box, in addition, can also promote the shock resistance of battery bottom of the box portion through the piece that keeps warm of great thickness.

In some embodiments, the thermal insulation member includes a foam layer that is sprayed to the outer wall of the heat exchange plate. The foaming layer is integrated on the heat exchange plate in a spraying mode, the foaming layer and the heat exchange plate do not need to be additionally assembled, the types and the number of parts of the battery box body are reduced, and the installation step of a heat preservation part is omitted.

In some embodiments, the material of the foam layer comprises polyurethane foam or polypropylene plastic.

In some embodiments, the insulation member comprises an insulation board, and the insulation board is provided as an integrally formed structure. The heated board has not only reduced the kind and the quantity of the spare part of battery box, and the heated board can also play heat preservation and guard action to the heat exchanger plate, and moreover, the heated board sets up to integrated into one piece structure, does not need additionally to assemble the heated board, has reduced the inefficacy risk of multiple different interface.

In some embodiments, the insulation board comprises a thermal insulation layer and a buffer protection layer, wherein the thermal insulation layer and the buffer protection layer are arranged in an integrated structure. The heat insulation layer plays a role in heat insulation of the heat exchange plate, and the buffer protection layer plays a role in protection of the heat exchange plate. Moreover, the integrally formed insulation board can reduce the number of parts and assembly processes.

In some embodiments, the insulation layer comprises a foamed polyurethane layer, and/or the buffer shield layer comprises a PP honeycomb layer.

In some embodiments, the inner wall of the insulation board is in close proximity to the outer wall of the heat exchanger plate, and/or the edge profile of the insulation board matches the edge profile of the heat exchanger plate. The outer wall that the heat transfer board was hugged closely to the inner wall of heated board includes that the heated board reaches the purpose of filling the gap between heated board and the heat transfer board through self flexible deformation or inflation to this reduces the space that comdenstion water or debris stored up between heated board and heat transfer board and influences the NVH performance of whole car.

In some embodiments, the heat exchange plate is a liquid cooling plate, the outer wall of the liquid cooling plate is provided with a flow channel protrusion, and the inner wall of the heat preservation plate is provided with a groove matched with the flow channel protrusion. The inner wall profile of the heat insulation board is matched with the outer wall profile of the heat exchange board, so that the volume of a cavity between the heat insulation board and the heat exchange board can be reduced, and the contact area between the heat insulation board and the heat exchange board is increased.

In some embodiments, a flexible cushion is laid at the bottom of the box body, and the heat exchange plate covers the outer wall of the flexible cushion. Through the effort between flexible pad buffering battery monomer or battery module and the heat transfer board to this reduces battery monomer or battery module because the damaged risk of rigid collision.

In some embodiments, the bottom of the box body is provided with a clamping groove, and at least part of the heat preservation piece is embedded into the clamping groove. Through filling the joint groove to the box at least part of heat preservation piece to can promote the intensity and the rigidity of battery box, simultaneously, alleviate the weight of battery box, realize the lightweight of whole battery box.

In some embodiments, the enclosure includes a beam frame and a rim disposed circumferentially around the beam frame, at least a portion of the thermal insulation being assembled to the beam frame and/or the rim. At least part of heat preservation spare is assembled to roof beam structure and/or frame through the mode of viscose or fastener to this makes heat preservation spare hug closely the heat transfer board setting, improves the temperature control effect and the guard action of heat preservation spare to the heat transfer board, reduces to form the performance that the space influences battery box between heat transfer board and the heat preservation spare.

The second aspect of the present application provides a battery, the battery: comprises at least one battery cell or battery module; and according to the battery box of the first aspect of the application, at least one battery cell or battery module sets up in the accommodation space of battery box.

A third aspect of the application provides an electrical consumer comprising a battery according to the second aspect of the application.

The above description is only an overview of the technical solutions of the present application, and the present application may be implemented in accordance with the content of the description so as to make the technical means of the present application more clearly understood, and the detailed description of the present application will be given below in order to make the above and other objects, features, and advantages of the present application more clearly understood.

Drawings

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

FIG. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

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

fig. 3 is a schematic structural view of a battery module according to some embodiments of the present disclosure;

fig. 4 is an exploded view of a battery cell according to some embodiments of the present disclosure;

fig. 5 is a schematic diagram of a disassembled structure of a battery box according to an embodiment of the present application;

FIG. 6 is a schematic structural view of a split insulation board of the battery box shown in FIG. 5;

FIG. 7 is a schematic top view of the battery housing of FIG. 5;

FIG. 8 is a schematic structural view of a split insulation board of the battery box shown in FIG. 7;

fig. 9 is a schematic structural view of an insulation board according to some embodiments of the present application.

Some of the reference numerals in the detailed description are as follows:

1000 vehicles;

100 batteries, 200 frames;

10 battery case, 11 first part, 12 second part, 13 flange;

20 battery modules, 21 battery cells, 211 end caps, 211a electrode terminals, 212 cases, 213 electrode assemblies;

110 box, 101 beam frame, 102 frame, 120 heat exchange plate, 121 flow channel bulge, 130 heat preservation piece, 131 plate body, 132 groove, 133 installation part and 140 flexible cushion.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present application more clearly, and therefore are only used as examples, and the protection scope of the present application is not limited thereby.

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 "including" and "having," and any variations thereof in the description and claims of this application and 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", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or to implicitly indicate the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase 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. It is explicitly and implicitly understood by one skilled in the art 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 only one kind of association relationship describing the association object, and means that three relationships may exist, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in 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 pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "parallel", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the indicated orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular 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 otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

Specifically, the battery box needs to install the liquid cooling board, the cotton bottom that forms the battery box together of bubble and end backplate in the assembling process, the cotton pasting of bubble is between liquid cooling board and end backplate, end backplate passes through the bolt or welds and the mode of gluing fixes the bottom at the battery box, the sub-assembly of constituteing by liquid cooling board, the cotton bottom of bubble and end backplate has not only increased the spare part quantity of battery box, the cavity between end backplate and the liquid cooling board still forms the comdenstion water easily, or get into foreign matter such as pebble, influence the NVH performance of whole car (Noise, vibration Noise and roughness Harshness), and end backplate only has a plywood, mechanical impact operating mode such as unable effective buffering bottom striking, end backplate has still increased the weight and the cost of battery box, and end backplate's heat preservation effect is relatively poor.

In order to solve the technical problem that the protection plate of battery box influences the performance of battery box on the market, the mode that the protection effect of protection plate was compromise through the heat preservation piece to the battery box that this application provided improves the performance of battery box.

The battery box disclosed in the embodiment of the application can be used for a battery. The battery box is used for accommodating a battery cell or a battery module, and for example, a battery is required for a vehicle, a ship and other equipment which need to use electric energy. The battery comprises a battery box body and a battery monomer or a battery module.

For convenience of explanation, the following examples will be described with reference to a battery according to an embodiment of the present application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present disclosure. The vehicle 1000 is provided with a battery 100 and a vehicle frame 200 inside, and the battery 100 may be provided on the vehicle frame 200. The plurality of batteries 100 may be stacked on the frame 200 from top to bottom, or may be laid on the frame 200.

Referring to fig. 2 and 3, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present disclosure, and fig. 3 is a schematic structural view of a battery module according to some embodiments of the present disclosure. The battery 100 includes a battery case 10 and a battery cell 21, and the battery cell 21 is accommodated in the battery case 10. The battery case 10 is used to provide a receiving space for the battery cells 21, and the battery case 10 may have various structures. In some embodiments, the battery case 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 cover each other, and the first portion 11 and the second portion 12 together define a receiving space for receiving the battery cell 21. Optionally, to ensure the sealing effect, both the first part 11 and the second part 12 are provided with cooperating flanges 13 at the edge positions. The second part 12 may be a hollow structure with one open end, the first part 11 may be a plate-shaped structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a containing space; the first portion 11 and the second portion 12 may be both hollow structures with one side open, and the open side of the first portion 11 may cover the open side of the second portion 12. Of course, the battery case 10 formed by the first and

second portions

11 and 12 may have various shapes, such as a cylinder, a rectangular parallelepiped, and the like.

In the battery 100, there may be a plurality of battery cells 21, and the plurality of battery cells 21 may be connected in series or in parallel or in series-parallel, where in series-parallel refers to both series connection and parallel connection among the plurality of battery cells 21. The plurality of battery monomers 21 can be directly connected in series or in parallel or in series-parallel, and the whole formed by the plurality of battery monomers 21 is accommodated in the box body 10; of course, the battery 100 may also be formed by connecting a plurality of battery cells 21 in series, in parallel, or in series-parallel to form a battery module 20, and then connecting a plurality of battery modules 20 in series, in parallel, or in series-parallel to form a whole, and the whole is accommodated in the box 10. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for achieving electrical connection between the plurality of battery cells 21.

Wherein, the battery unit 21 may be a secondary battery or a primary battery; but is not limited to, a lithium sulfur battery, a sodium ion battery, or a magnesium ion battery. The battery cell 21 may be cylindrical, flat, rectangular parallelepiped, or other shape.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a battery module 20 according to an embodiment of the present disclosure. In fig. 3, the battery module 20 may include a plurality of battery cells 21, the plurality of battery cells 21 may be connected in series or in parallel or in series-parallel to form the battery module 20, and the plurality of battery modules 20 may be connected in series or in parallel or in series-parallel to form the battery 10. The battery cells 21 are generally divided into three types in an encapsulated manner: the battery pack comprises a cylindrical battery cell 21, a square battery cell 21 and a soft package battery cell 21, and the embodiment of the application is not limited to this. However, for the sake of brevity, the following embodiments are described by taking the square battery cell 21 as an example.

Fig. 4 is an exploded schematic view of a battery cell 21 according to some embodiments of the present disclosure. The battery cell 21 refers to the smallest unit constituting the battery 100. As shown in fig. 4, the battery cell 21 includes an end cap 211, a case 212, and an electrode assembly 213.

The end cap 211 refers to a member that covers an opening of the case 212 to isolate the internal environment of the battery cell 21 from the external environment. The shape of end cap 211 may be adapted to the shape of housing 212 to fit housing 212. Alternatively, the end cap 211 may be made of a material (e.g., an aluminum alloy) having a certain hardness and strength, so that the end cap 211 is not easily deformed when being impacted, and thus the battery cell 21 may have a higher structural strength and the safety performance may be improved. The end cap 211 may be provided with functional parts such as the electrode terminal 211 a. The electrode terminal 211a may be used to be electrically connected with the electrode assembly 213 for outputting or inputting electric energy of the battery cell 21. In some embodiments, the end cap 211 may further include a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold value. In some embodiments, insulation may also be provided on the inside of end cap 211, which may be used to isolate electrically connected components within housing 212 from end cap 211 to reduce the risk of shorting. Illustratively, the insulator may be plastic, rubber, or the like.

The case 212 is an assembly for fitting the end cap 211 to form an internal environment of the battery cell 21, wherein the formed internal environment may be used to house the electrode assembly 213, an electrolyte (not shown in the drawings), and other components. The housing 212 and the end cap 211 may be separate components, and an opening may be formed in the housing 212, and the opening may be covered by the end cap 211 to form the internal environment of the battery cell 21. Alternatively, the end cover 211 and the housing 212 may be integrated, specifically, the end cover 211 and the housing 212 may form a common connecting surface before other components are inserted into the housing, and when it is required to encapsulate the interior of the housing 212, the end cover 211 covers the housing 212. The housing 212 may be a variety of shapes and sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the case 212 may be determined according to the specific shape and size of the electrode assembly 213. The material of the housing 212 may be various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present invention is not limited thereto.

The electrode assembly 213 is a part in which electrochemical reactions occur in the battery cell 21. One or more electrode assemblies 213 may be contained within the housing 212. The electrode assembly 213 is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is generally disposed between the positive electrode sheet and the negative electrode sheet. The portions of the positive and negative electrode tabs having the active material constitute the body portion of the electrode assembly 213, and the portions of the positive and negative electrode tabs having no active material each constitute a tab (not shown in the drawings). The positive electrode tab and the negative electrode tab may be located at one end of the main body portion together or at both ends of the main body portion, respectively. During the charge and discharge of the battery 100, the positive and negative active materials react with the electrolyte, and the tabs are connected to the electrode terminals 211a to form a current loop.

Referring to fig. 5 to 9, fig. 5 is a schematic view illustrating a disassembled structure of a battery box according to an embodiment of the present application; FIG. 6 is a schematic structural view of a split insulation board of the battery box shown in FIG. 5; FIG. 7 is a schematic top view of the battery case of FIG. 5; FIG. 8 is a schematic structural view of a split insulation board of the battery box shown in FIG. 7; fig. 9 is a schematic structural view of an insulation board according to some embodiments of the present application.

The first aspect of the present application provides a battery box 10, the battery box 10 includes a box 110, a heat exchange plate 120 and a heat preservation member 130, the heat exchange plate 120 is disposed at the bottom of the box 110, the heat preservation member 130 covers the outer wall of the heat exchange plate 120, and the outer wall of the heat preservation member 130 constitutes the outer wall of the battery box 10.

In the present embodiment, the battery box 10 in the embodiment of the present application may be a box-shaped structure as shown in fig. 2, and may also be a tray-shaped structure as shown in fig. 5 to 8, and both structures belong to the protection scope of the battery box 10 in the embodiment of the present application, and will be described in detail by using the battery box 10 as shown in fig. 5 to 8 as a preferred embodiment.

The heat exchange plate 120 can be selected as a liquid cooling plate, an air cooling plate or other types of heat dissipation plates, and chemical batteries such as lithium batteries have the characteristics of high energy density, long service life, high working voltage and the like, but when the chemical batteries work, the high temperature and the low temperature greatly affect the battery core, and in order to make the working temperature of the battery core in the chemical batteries consistent, the internal temperature of the battery box body 10 is adjusted through the heat exchange plate 120, so that the battery core works in an environment with relatively constant temperature.

In order to maintain the temperature control reliability of heat exchange plate 120 to electric core and in order to protect heat exchange plate 120, the embodiment of this application is provided with heat preservation piece 130 at the outer wall of heat exchange plate 120 (the lateral wall of the chamber that holds that is back to battery box 10), heat preservation piece 130 can select expanded material such as polypropylene plastics, heat preservation piece 130 not only can reduce heat exchange plate 120 and outside air's heat transfer volume, the shock-absorbing capacity of heat preservation piece 130 can also provide more powerful support for heat exchange plate 120, avoid heat exchange plate 120 the bending deformation's condition to appear in the course of the work of battery box 10, guarantee tightly hug closely together all the time between battery monomer 21 or battery module 20 and the heat exchange plate 120, thereby improve the temperature control reliability of battery box 10.

The battery box 10 that this application embodiment provided compromises the heat preservation and the guard action to heat exchange plate 120 through heat preservation piece 130, thereby need not set up the guard plate at the outer wall of heat preservation piece, with this part quantity that reduces battery box 10, and simultaneously, the low density performance of heat preservation piece 130 can also reduce battery box 10's weight, with this energy density who improves battery box 10, the stronger thermal insulation performance of heat preservation piece 130 can also improve battery box 10's thermal insulation performance, in addition, can also promote battery box 10's bottom through the thickness that increases heat preservation piece 130 and resist external force's ability.

It should be noted that, the embodiment of the present application includes the heat exchange plate 120 disposed on the side wall of the battery case 10, and the heat exchange plate 120 disposed at the bottom of the battery case 10, and the following description will be made by setting the heat exchange plate 120 at the bottom of the battery case 10 as a preferred embodiment.

In some embodiments, the thermal insulation member 130 includes a foamed layer that is sprayed to the outer wall of the heat exchange plate 120.

In this embodiment, the foaming layer may be selected from a foaming material such as polyurethane foaming glue or polypropylene plastic, and in the process of spraying the foaming layer on the heat exchange plate 120, a part of the foaming material may also be filled in a gap between the heat exchange plate 120 and the box body 110, and in the process of locking and fixing between the heat exchange plate 120 and the box body 110 by a fastener such as a rivet, the compression ratio of the foaming material is controlled by a pre-tightening force applied between the heat exchange plate 120 and the box body 110 by the fastener, and the purpose of improving the sealing performance between the heat exchange plate 120 and the box body 110 is achieved by controlling the compression ratio of the foaming material.

According to the embodiment of the application, the foaming layer is integrated on the heat exchange plate 120 in a spraying manner, the foaming layer and the heat exchange plate 120 do not need to be additionally assembled, the types and the number of parts of the battery box body 10 are reduced, and the installation step of the heat preservation member 130 is omitted. Moreover, the foaming layer and the heat exchange plate 120 are integrated together to be in flexible connection, the foaming layer can fill the gap between the foaming layer and the heat exchange plate 120 to the maximum extent through self expansion, and the NVH performance of the whole vehicle cannot be influenced by the gap between the foaming layer and the heat exchange plate 120 due to accumulation of condensed water or impurities.

In some embodiments, the insulating member 130 comprises an insulating plate, which is provided as an integrally formed structure.

In this embodiment, can compromise heat preservation and guard action through the thickness of rational design heated board, but the shaping is moulded to the heated board optional heat of integrated into one piece structure, can also choose to pass through the machine tooling shaping, the heated board for the metal guard plate among the prior art, it is little to have density, stronger heat preservation performance and shock-absorbing capacity, can provide more powerful support for heat transfer board 120, avoid heat transfer board 120 because bear the condition that bending deformation appears in external force in the course of the work of battery box 10.

The heated board of this application embodiment has not only reduced the kind and the quantity of the spare part of battery box 10, and the heated board can also play heat preservation and guard action to heat-exchanging plate 120, and moreover, the heated board sets up to integrated into one piece structure, does not need additionally to assemble the heated board, has reduced the inefficacy risk of multiple different interface connections.

In addition, the heated board of integrated into one piece structure not only can play thermal-insulated effect, can also cushion the rigid contact between heat transfer board 120 and the external force, because the heated board has structural integrity and certain flexibility, when the bottom of box 110 bears the external force and assaults, the heated board can cushion the external force through the flexonics of self and assault, when external force disappears, the heated board can resume to the original state through the structural integrity of self to this reduces the influence of external force impact to battery box 10 normal use. Compare in foaming layer and split type heat preservation among the prior art, foaming layer and split type heat preservation among the prior art are when bearing external force and assault, owing to do not possess structural integrity, the foaming layer is punctured by external force very easily, perhaps split type heat preservation is difficult to the original state after being in the same place by external force extrusion, impaired foaming layer and by the normal use that the split type heat preservation after the extrusion deformation can influence battery box 10, for example, influence the normal heat dissipation of battery box 10, shock resistance and the normal gesture of placing.

In some embodiments, the insulation board comprises a thermal insulation layer and a buffer protection layer, and the thermal insulation layer and the buffer protection layer are arranged in an integrated structure.

In this embodiment, the heated board includes insulating layer and buffering inoxidizing coating, the insulating layer is low density foaming polyurethane layer or other low heat conductivity material (the specific data of low density and low heat conductivity is decided according to specific application environment, can reach relative prior art's battery box have thermal-insulated and subtract heavy effect can, the specific data of low density and low heat conductivity does not publish here), the buffering inoxidizing coating is PP honeycomb layer (by the firm bonding of two thinner polypropylene panels at the board that the honeycomb core material two sides that the one deck is thicker made), low density foaming polyurethane layer is located the top of PP honeycomb layer, not only play the heat preservation effect to battery box 10, can also further produce the cushioning effect to the impact and promote the barrier propterty of battery box 10, with this impact resistance who strengthens battery box 10.

When assembling the battery box 10, after the heat exchange plate 120 is assembled, the PP honeycomb layer and the low-density polyurethane layer are assembled at the bottom of the heat exchange plate 120 by bonding, riveting or clamping. Specifically, this application embodiment makes specific mould according to the structure relation of box 110 and battery module 20, preheats the mould, makes the surface temperature of mould reach the melting point on PP honeycomb layer, fills the mould with low density foaming polyurethane material in, lets in steam for the cubic, the cooling, the drawing of patterns, the heated board of drying and stereotype formation integral type.

In some embodiments, please refer to fig. 7 and 8, the inner wall of the insulation board is closely attached to the outer wall of the heat exchange plate 120, and/or the edge profile of the insulation board is matched with the edge profile of the heat exchange plate 120.

In this embodiment, the outer wall that heat transfer board 120 is hugged closely to the inner wall of heated board (towards one side of heat transfer board 120) includes that the heated board reaches the purpose of filling the gap between heated board and the heat transfer board 120 through self flexible deformation or inflation to this reduces the phenomenon that the whole car NVH performance is influenced in the space that comdenstion water or debris store up between heated board and heat transfer board 120.

The edge profile of heated board matches with the edge profile of heat transfer board 120 and can make the heated board cover heat transfer board 120 completely, because the thermal insulation performance of heated board is superior to the thermal insulation performance of air, and its coefficient of thermal conductivity is less than air coefficient of thermal conductivity promptly, increases the heat preservation performance that the heated board can further promote the heated board with the cooperation degree of heat transfer board 120, reduces the heat loss of heat transfer board 120.

In some embodiments, as shown in fig. 8 and 9, the heat exchange plate 120 is configured as a liquid cooling plate, and the outer wall of the liquid cooling plate is provided with a flow channel protrusion 121, and the inner wall of the heat insulation plate is provided with a groove 132 matched with the flow channel protrusion 121.

In this embodiment, the inside of heat exchange plate 120 sets up to hollow structure, hollow structure forms a plurality of runners arch 121 of circuitous distribution, the refrigerant is at the inside circuitous flow of a plurality of runners arch 121, thereby reach the inside heat of battery box 10 and carry out the purpose of heat transfer, the outer wall setting of a plurality of runners arch 121 protrusion heat exchange plate 120, the inner wall of the plate body 131 of heated board is provided with the protruding 121 complex recess 132 of runner, the heated board hugs closely the protruding 121 setting of runner of heat exchange plate 120 through recess 132.

The inner wall profile of the insulation board is matched with the outer wall profile of the heat exchange plate 120, the cavity volume between the insulation board and the heat exchange plate 120 can be reduced, the contact area between the insulation board and the heat exchange plate 120 is increased, the thermal conductivity of the insulation board is superior to that of air, namely the thermal conductivity of the insulation board is lower than that of air, and the contact area between the insulation board and the liquid cooling plate is increased to further improve the thermal insulation performance of the foaming plate.

In some embodiments, as shown in fig. 5, a flexible mat 140 is laid on the bottom of the box body 110, and the heat exchange plate 120 covers the outer wall of the flexible mat 140.

In this embodiment, because heat exchange plate 120 sets up in the bottom of box 110, can make the battery monomer or the battery module in battery box 10 utilize self gravity to be close to heat exchange plate 120's direction to this improves the heat transfer effect between battery monomer or battery module and the heat exchange plate 120, reaches the purpose of adjusting the temperature to battery monomer or battery module through heat exchange plate 120, with this influence that reduces high temperature environment and low temperature environment to electric core.

Further, in order to buffer the hard contact between the single battery or the battery module and the heat exchange plate 120, the embodiment of the application further provides that a flexible pad 140 (such as a silicone pad) is disposed between the single battery or the battery module and the heat exchange plate 120, and the flexible pad 140 buffers an external force, so that the risk that the single battery or the battery module is damaged due to a hard collision is reduced.

In some embodiments, the bottom of the case 110 is provided with a catching groove (not shown) into which at least a portion of the thermal insulating member 130 is inserted.

In this embodiment, taking the battery box shown in fig. 5 to 8 as an example, the bottom of the battery box 10 includes a beam frame 101, a frame 102 and a heat exchange plate 120, the frame 102 is disposed on the periphery of the beam frame 101, the heat exchange plate 120 is disposed on the outer side of the bottom of the beam frame 101, a clamping groove is disposed on the beam frame 101, the frame 102 or the heat exchange plate 120, and at least a portion of the heat preservation member 130 is filled in the clamping groove on the bottom of the battery box 10, so as to improve the bottom strength and rigidity of the battery box 10, reduce the weight of the battery box 10, and achieve the light weight of the entire battery box 10. In addition, the battery case 10 filled with the heat insulating member 130 can improve the heat insulating effect of the battery case 10.

It should be noted that, embedding the thermal insulating member 130 into the heat exchange plate 120 or the box body 110 is only a preferred embodiment of the present application, and is not limited to the fixing manner of the thermal insulating member 130, for example, in other embodiments of the present application, the thermal insulating member 130 may be adhered to the heat exchange plate 120, or the mounting portion 133 of the thermal insulating member 130 may be assembled to the heat exchange plate 120 and/or the box body 110 by a fastener. Specifically, the heat insulating member 130 is directly fixed to the bottom of the heat exchanging plate 120 by a structural adhesive, a double-sided adhesive, or a fastener, so as to improve the impact resistance of the bottom of the battery box 10, and meanwhile, the heat insulating function of the heat exchanging plate 120 can be realized, and the energy loss of the heat exchanging plate 120 is reduced.

It should be noted that the battery box 10 of the embodiment of the present application may have the structure shown in fig. 2, and may also have the structures shown in fig. 5 to 8, and both of the structures belong to the protection scope of the embodiment of the present application, and will be described in detail with reference to the battery box 10 shown in fig. 5 to 8.

In some embodiments, as shown in fig. 5, case 110 includes a beam and a rim 102 disposed circumferentially around beam 101, with at least a portion of thermal insulator 130 being assembled to beam 101 and/or rim 102.

In this embodiment, at least a portion of the thermal insulation member 130 is assembled to the beam frame 101 and/or the frame 102 by means of glue or fasteners, so that the thermal insulation member 130 is disposed close to the heat exchange plate 120, the temperature control effect and the protection effect of the thermal insulation member 130 on the heat exchange plate 120 are improved, and the influence of a gap formed between the heat exchange plate 120 and the thermal insulation member 130 on the performance of the battery box 10 is reduced.

Further, the beam frame 101 is fixed to the inner sides of the two side frames 102 by fasteners, the beam frame 101 includes a longitudinal beam located in the middle and a plurality of equidistantly arranged transverse beams, one end of each transverse beam is fixed to the longitudinal beam by a fastener, the other end of each transverse beam is fixed to the inner sides of the two side frames 102 by a fastener, and the longitudinal beam and the plurality of equidistantly arranged transverse beams form a plurality of placing grooves for placing the plurality of battery cells 21 or the battery modules 20.

The beam frame 101 is connected with the frame 102 through the connecting piece by rivets, welding amount and welding deformation can be reduced, the heat exchange plate 120 is connected with the frame 102 and the beam frame 101 through screws, heat radiation of the heat exchange plate 120 can be effectively reduced through the heat preservation piece 130 of the embodiment of the application, energy consumption of products is reduced, temperature uniformity of the battery is improved, the frame 102 can be sealed through heat preservation materials, accordingly, the heat dissipation area of the frame 102 is reduced, and heat of the battery is reduced to exchange heat with outside air through the frame 102.

Further, be equipped with the shutoff piece between two adjacent frames 102, the shutoff piece is preferably that heat preservation 130 spraying or the packing of this application embodiment are made for the die cavity mouth between two adjacent frames 102 of shutoff reduces the heat radiating area of frame 102, prevents the thermal scattering and disappearing of battery, further promotes the protective action of battery box 10 to electric core.

The heat exchange plate 120 is preferably a liquid cooling plate, the liquid cooling plate is welded to the bottom of the box body 110 in a brazing mode and is formed through a blowing process, and a water nozzle is welded to the bottom of the box body 110 and is used for enabling a refrigerant in the liquid cooling plate to enter and exit and forming a liquid cooling loop with the liquid cooling plate below the water nozzle and used for controlling the temperature of the electric core in the battery box body 10.

In a second aspect of the present application, a battery 100 includes at least one battery cell 21 or battery module 20 and a battery case 10 according to the first aspect of the present application, and the at least one battery cell 21 or battery module 20 is disposed in a receiving space of the battery case 10.

In the present embodiment, the battery 100 includes the battery case 10 of the first aspect of the present application, a sealing cover, and a plurality of battery modules 20, the battery case 10 and the sealing cover cooperate to form a battery accommodating cavity, the battery modules 20 are installed in the battery accommodating cavity, the sealing cover is disposed above the battery modules 20 and the battery case 10, and the sealing cover is installed on the battery case 10 through a connecting member.

The stress condition of the battery box 10 in practical application scenarios is explained by some preferred embodiments of the present application.

Take the consumer as the electric motor car as an example, under the normal operating scene of electric motor car, battery box 10 passes through the temperature equilibrium of heat preservation 130 control battery box 10, under the whole car collision scene of electric motor car, when the bottom of battery box 10 bears the impact, heat preservation 130 can bear and cushion the impact, reduce heat transfer plate 120 and take place slope and deformation under the impact effect, thereby reduce heat transfer plate 120 and take place the risk of fall-in and extrusion battery monomer 21 or battery module 20, the collision security performance of battery box 10 has been improved.

The embodiment that this application provided compromises the guard plate's guard action through heat preservation 130 to this heat preservation and the protection security performance who promotes battery box 10, consequently, need not increase the guard plate of metal material in the outside of heat preservation 130, reduced the weight and the spare part quantity of battery box 10, and reduced the influence of the institutional advancement of battery box 10 to the cost.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. This application is not limited to the particular disclosures herein

But that the embodiments include all embodiments falling within the scope of the appended claims.

Claims

1. A battery case, characterized in that, the battery case includes:

a box body;

the heat exchange plate is arranged at the bottom of the box body;

the heat preservation piece covers the outer wall of the heat exchange plate, and the outer wall of the heat preservation piece forms the outer wall of the battery box body,

the heat preservation piece comprises a heat preservation plate which is of an integrally formed structure.

2. The battery box body of claim 1, wherein the heat insulation plate comprises a heat insulation layer and a buffer protection layer, and the heat insulation layer and the buffer protection layer are arranged in an integral structure.

3. The battery box of claim 2, wherein the insulation layer comprises a foamed polyurethane layer and/or the buffer protection layer comprises a PP honeycomb layer.

4. The battery box according to any one of claims 1 to 3, characterized in that the inner wall of the insulation board is in close contact with the outer wall of the heat exchange plate and/or the edge profile of the insulation board matches the edge profile of the heat exchange plate.

5. The battery box body as claimed in any one of claims 1 to 3, wherein the heat exchange plate is a liquid cooling plate, the outer wall of the liquid cooling plate is provided with a flow channel protrusion, and the inner wall of the heat insulation plate is provided with a groove matched with the flow channel protrusion.

6. The battery box body as claimed in any one of claims 1 to 3, wherein a flexible cushion is laid at the bottom of the box body, and the heat exchange plate covers the outer wall of the flexible cushion.

7. The battery box body according to any one of claims 1 to 3, wherein a clamping groove is formed in the bottom of the box body, and at least part of the heat preservation piece is embedded into the clamping groove.

8. The battery case according to any one of claims 1 to 3, wherein the case comprises a beam frame and a rim provided circumferentially around the beam frame, and at least part of the heat retaining member is fitted to the beam frame and/or the rim.

9. A battery, comprising:

at least one battery cell or battery module;

the battery case according to any one of claims 1 to 8, wherein at least one of the battery cells or the battery modules is disposed in a receiving space of the battery case.

10. An electrical consumer, characterized in that the electrical consumer comprises a battery according to claim 9.