CN216720173U

CN216720173U - Battery box, battery and power consumption device

Info

Publication number: CN216720173U
Application number: CN202220130198.5U
Authority: CN
Inventors: 王勇; 王庆; 赵鹏博
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2022-01-18
Filing date: 2022-01-18
Publication date: 2022-06-10
Anticipated expiration: 2032-01-18

Abstract

The application provides a battery box, battery and electric installation relates to battery technical field. The battery box body comprises a base body and a heat exchange plate; the base body comprises a bottom plate and a side plate arranged around the edge of the bottom plate, the bottom plate and the side plate are integrally formed, the bottom plate is provided with a top wall and a bottom wall which are opposite, the side plate is provided with an outer wall and an inner wall which are opposite, and a first mounting groove for mounting a battery monomer is formed in the top wall and the inner wall; one side of the heat exchange plate is provided with a flow channel, and the side of the heat exchange plate with the flow channel is connected with the bottom wall. The integrated into one piece's base member has good sealing performance to can save the airtight detection behind frame seal detection and the integrated cold plate, only need carry out the airtight detection of box assembly, simplify the detection in the assembling process greatly, reduce the detection cost of battery box. Simultaneously, the direct integration of heat transfer board is at the diapire of base member for the battery box has higher integrated level, avoids being in the battery box other positions carry out water-cooling integration.

Description

Battery box, battery and power consumption device

Technical Field

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

Background

At present, the mainstream battery box body is frame integrated water cooling, wherein, the connection mode of the stamping brazing cold plate and the frame is FDS connection or friction stir welding, in order to ensure the sealing performance of the box body, the frame sealing detection, the airtight detection after the cold plate integration and the airtight detection of the box body assembly are required to be carried out in the assembling process, namely, the detection in the assembling process is more, and the detection cost is higher.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present application provides a battery case, a battery, and an electric device, which can improve the sealing performance of the battery case, reduce the number of times of airtight detection, and reduce the detection cost.

In a first aspect, the present application provides a battery case, comprising: a base body and a heat exchange plate; the base body comprises a bottom plate and a side plate arranged around the edge of the bottom plate, the bottom plate and the side plate are integrally formed, the bottom plate is provided with a top wall and a bottom wall which are opposite, the side plate is provided with an outer wall and an inner wall which are opposite, and a first mounting groove for mounting a battery monomer is formed in the top wall and the inner wall; one side of the heat exchange plate is provided with a flow channel, and the side of the heat exchange plate with the flow channel is connected with the bottom wall.

Among the technical scheme of this application embodiment, have the base member integrated into one piece that is used for installing the free first mounting groove of battery, integrated into one piece's base member has good sealing performance to can save the airtight detection behind frame seal detection and the integrated cold plate, only need carry out the airtight detection of box assembly, simplify the detection in the assembling process greatly, reduce the detection cost of battery box. Simultaneously, the direct integration of heat transfer board is at the diapire of base member for the battery box has higher integrated level, avoids being in the battery box other positions carry out water-cooling integration.

In some embodiments, the battery box body further comprises a reinforcing frame, and the reinforcing frame is attached to the outer wall of the side plate. The strengthening frame sets up the outer wall at the curb plate for the intensity of reinforcing base member prevents that the base member from taking place to deform receiving inside battery monomer's bulging force and outside mechanical force.

In some embodiments, the battery case further includes a connecting member, the side plate has a first connecting hole, the reinforcing frame has a second connecting hole, and the connecting member passes through the first connecting hole and the second connecting hole to connect the reinforcing frame to the side plate. In the battery box of this application embodiment, strengthen frame and curb plate and pass through the connecting piece and realize stable the connection.

In some embodiments, the battery box body further comprises a connecting piece, the side plate comprises a plate body and a flanging arranged at the top of the plate body and arranged towards the bottom plate, the flanging is provided with a first connecting hole, a second mounting groove is formed between the flanging and the plate body, the top of the reinforcing frame is provided with a second connecting hole, the top of the reinforcing frame is arranged in the second mounting groove, and the connecting piece penetrates through the first connecting hole and the second connecting hole to enable the reinforcing frame to be connected to the side plate. In the battery box of this application embodiment, when the installation is strengthened the frame, install the top of strengthening the frame in the second mounting groove, guarantee before the connecting piece is connected, strengthen the frame and have had the position relation of connecting with the base member, pass first connecting hole and second connecting hole with the connecting piece again at last and realize strengthening the frame and stably connect in the curb plate.

In some embodiments, the reinforcing frame is bonded and/or welded to the base. In the battery box body of the embodiment of the application, the reinforcing frame can be connected with the base body in a bonding or welding mode, or can be connected with the base body in a bonding and welding mode, or can be connected with the base body in a bonding mode by penetrating the first connecting hole and the second connecting hole through the connecting piece, or can be connected with the base body in a welding mode by penetrating the first connecting hole and the second connecting hole through the connecting piece, or can be connected with the base body in a bonding and welding mode.

In some embodiments, the reinforcing frame is bonded to the outer wall of the side panel. The specific surface area of the outer wall of the side plate is large, when the reinforcing frame is attached to the outer wall of the side plate, the inner wall of the reinforcing frame and the outer wall of the side plate have large bonding areas, and therefore the reinforcing frame and the base body are stably connected in a bonding mode.

In some embodiments, the bottom of the reinforcing frame and the bottom of the base are welded. After laminating the reinforcing frame at the outer wall of curb plate, the bottom that directly will reinforce the frame welds with the bottom of base member, and is very convenient, and welded structure is more stable.

In some embodiments, the material of the reinforcing frame is aluminum or aluminum alloy. In the battery box of this application embodiment, adopt aluminium or aluminum alloy to make the reinforcing frame and can reduce the whole weight of battery box, make the battery box lighter more.

In some embodiments, the substrate is made of aluminum or aluminum alloy. In the battery box of this application embodiment, adopt aluminium or aluminum alloy to make the base member can reduce the whole weight of battery box, make the battery box lighter more.

In some embodiments, the heat exchange plate is made of aluminum, aluminum alloy or plastic. In the battery box of this application embodiment, adopt aluminium, aluminum alloy or plastics to make the heat transfer board can reduce the whole weight of battery box, make the battery box lighter-weighted more.

In some embodiments, the battery case further includes a bottom cover attached to the reinforcing frame and/or the bottom of the base. The bottom guard plate is used for preventing bottom puncture and bottom stone impact, so that the single batteries in the battery box body are kept in a stable state.

In some embodiments, the battery case further includes a cross member and a fixing beam for defining the battery cell, both of which are disposed in the first mounting groove. The crossbeam and the fixed beam can restrain the position of the single battery in the first mounting groove, wherein the fixed beam is used for restraining the single battery and limiting free expansion of the single battery.

In a second aspect, the present application provides a battery, which includes a single battery and the battery box body in the above embodiment, wherein the single battery is disposed in the first mounting groove.

In a third aspect, the present application provides an electric device comprising the battery of the above embodiment, the battery being used for providing electric energy.

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

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

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

FIG. 2 is a schematic diagram of the battery of the vehicle of FIG. 1;

FIG. 3 is an exploded view of a battery case according to some embodiments of the present application;

FIG. 4 is a schematic diagram of an assembled battery case according to some embodiments of the present disclosure;

FIG. 5 is a schematic illustration of an assembled substrate and heat exchanger plate according to some embodiments of the present application;

FIG. 6 is an exploded view of another battery can according to some embodiments of the present application;

FIG. 7 is a schematic assembled battery case according to some embodiments of the present application;

FIG. 8 is a top view of the assembled base, heat exchanger plates and reinforcing frame of some embodiments of the present application;

fig. 9 is a partial schematic view of a battery case according to some embodiments of the present application.

Icon: 1000-a vehicle;

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

10-a box body; 20-a battery cell;

400-a substrate; 401-a first mounting groove; 402-a concave trough; 410-a bottom plate; 411-top wall; 412-bottom wall; 420-side plate; 421-inner wall; 422-outer wall; 423-first connection hole; 424-flanging; 425-a plate body; 500-heat exchange plates; 501-a flow channel; 600-a cover body; 700-a reinforcement frame; 701-a second connection hole; 710-a connector; 800-bottom guard board; 910-a fixed beam; 920-beam.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only 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 above figures 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 implicitly indicating 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 an associated 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", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, 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 stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. 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.

At present, the application of the power battery is more and more extensive from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like, and a plurality of fields such as military equipment and aerospace. With the continuous expansion of the application field of the power battery, the market demand is also continuously expanded.

The inventor of the application notices that the battery box body is used for loading the battery monomer, and the battery box body has high requirements on various indexes such as sealing performance, flame retardant property, strength, rigidity, impact resistance, vibration resistance, extrusion resistance, heat conductivity, puncture resistance and the like. For example, when assembling the battery box, frame sealing detection, airtightness detection after integrating the cold plate, and airtightness detection of the box assembly are required, the detection process is complicated, and the detection cost is high.

In order to improve the sealing performance of the battery box body, the inventor of the application researches and discovers that the connection mode and/or the forming mode of partial structures of the battery box body can be changed, so that the sealing performance of the battery box body is improved, the detection times in the assembly process are reduced, and the detection cost is reduced. And the material of the partial structure of the battery box body can be changed, and the weight of the battery box body is reduced on the basis of ensuring the required rigidity and strength.

Based on the above consideration, in order to improve the sealing performance of the battery box, the inventor has conducted extensive research and has designed a battery box, which includes a base body and a heat exchange plate, wherein the base body includes a side plate and a bottom plate, the side plate and the bottom plate are integrally formed, and the side plate and the bottom plate form a first mounting groove for mounting a battery cell.

Because the integrated into one piece structure of base member does not have the gap between curb plate and the bottom plate for the base member has better leakproofness. And the sealing performance of the integrally formed base body is predictable, so that the frame sealing detection and the air tightness detection after the cold plate is integrated can be omitted in the assembling process of the battery box body, the detection in the assembling process is greatly simplified, and the detection cost of the battery box body is reduced.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. The battery generally includes a battery case for enclosing one or more battery cells, and the battery case prevents liquid or other foreign materials from affecting the charge or discharge of the battery cells.

The battery cell may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell, and the like, which is not limited in this application. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which is not limited in the embodiments of the present application. The battery cells are generally divided into three types in a packaging manner: the battery pack comprises a cylindrical battery monomer, a square battery monomer and a soft package battery monomer.

The battery monomer comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive electrode plate, a negative electrode plate and a separation film. The battery cell mainly depends on metal ions to move between the positive pole piece and the negative pole piece to work. The positive pole piece includes anodal mass flow body and anodal active substance layer, and anodal active substance layer coats in anodal mass flow body's surface, and the anodal mass flow body protrusion in the anodal mass flow body that has coated anodal active substance layer of uncoated anodal active substance layer, and the anodal mass flow body that does not coat anodal active substance layer is as anodal utmost point ear. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The negative pole piece includes negative current collector and negative active material layer, and the negative active material layer coats in the surface of negative current collector, and the negative current collector protrusion in the negative current collector who has coated the negative active material layer of uncoated negative active material layer, the negative current collector who does not coat the negative active material layer makes negative pole utmost point ear. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that the fuse is not fused when a large current is passed, the number of the positive electrode tabs is multiple and the positive electrode tabs are stacked together, and the number of the negative electrode tabs is multiple and the negative electrode tabs are stacked together. The material of the isolation film may be polypropylene (PP) or Polyethylene (PE). In addition, the electrode assembly may have a winding structure or a lamination structure, and the embodiment of the present application is not limited thereto.

The battery unit further comprises a current collecting member for electrically connecting the tab of the battery unit and the electrode terminal to transmit electric energy from the electrode assembly to the electrode terminal and to the outside of the battery unit through the electrode terminal; the plurality of battery cells are electrically connected through the confluence part so as to realize series connection, parallel connection or series-parallel connection of the plurality of battery cells.

The battery also comprises a sampling terminal and a battery management system, wherein the sampling terminal is connected to the bus component and is used for collecting information of the battery cells, such as voltage or temperature. The sampling terminal transmits the acquired information of the single battery to the battery management system, and when the battery management system detects that the information of the single battery exceeds a normal range, the output power of the battery is limited so as to realize safety protection.

It is to be understood that the electric device using the battery described in the embodiments of the present application may be in various forms, for example, a mobile phone, a portable device, a notebook computer, a battery car, an electric car, a ship, a spacecraft, an electric toy, an electric tool, and the like, for example, a spacecraft including an airplane, a rocket, a space shuttle, a spacecraft, and the like, an electric toy including a stationary type or a mobile type electric toy, for example, a game machine, an electric car toy, an electric ship toy, an electric plane toy, and the like, an electric tool including a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an electric impact drill, a concrete vibrator, and an electric planer.

The battery cell and the battery described in the embodiments of the present application are not limited to be applied to the above-described electric devices, but may be applied to all electric devices using the battery cell and the battery.

FIG. 1 is a simplified schematic illustration of a vehicle according to some embodiments of the present application; fig. 2 is a schematic structural view of a battery of the vehicle of fig. 1.

Referring to fig. 1, a battery 100, a controller 200, and a motor 300 are disposed inside a vehicle 1000, and the battery 100 may be disposed at the bottom or the front or rear of the vehicle 1000, for example. The vehicle 1000 may be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile may be a pure electric automobile, a hybrid electric automobile, or a range-extended automobile, etc.

In some embodiments of the present application, the battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may serve as an operating power source of the vehicle 1000. The controller 200 is used to control the battery 100 to supply power to the motor 300, for example, for operation power demand at the start, navigation, and traveling of the vehicle 1000.

In other embodiments, the battery 100 may be used not only as an operating power source of the vehicle 1000, but also as a driving power source of the vehicle 1000, instead of or in part replacing fuel or natural gas to provide driving power for the vehicle 1000.

Herein, the battery 100 referred to in the embodiments of the present application refers to a single physical module including one or more battery cells 20 to provide higher voltage and capacity. For example, the battery 100 is formed by connecting a plurality of battery cells 20 in series or in parallel.

Referring to fig. 2, the battery 100 includes a battery case 10 and a battery cell 20, and the battery cell 20 is accommodated in the battery case 10.

In the battery 100, the number of the battery cells 20 may be multiple, and the multiple battery cells 20 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 multiple battery cells 20. The plurality of battery monomers 20 can be directly connected in series or in parallel or in series-parallel, and the whole formed by the plurality of battery monomers 20 is accommodated in the battery box body 10; of course, the battery 100 may also be formed by connecting a plurality of battery cells 20 in series, in parallel, or in series-parallel to form a battery module, and then connecting a plurality of battery modules in series, in parallel, or in series-parallel to form a whole, and accommodating the battery modules in the battery 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 20.

According to some embodiments of the present application, please refer to fig. 3 to 7, fig. 3 is an exploded view of a battery box body according to some embodiments of the present application, fig. 4 is a structural schematic diagram of the battery box body according to some embodiments of the present application after assembly, fig. 5 is a structural schematic diagram of a substrate and a heat exchange plate according to some embodiments of the present application after assembly, fig. 6 is an exploded view of another battery box body according to some embodiments of the present application, and fig. 7 is a structural schematic diagram of another battery box body according to some embodiments of the present application after assembly. The present application provides a battery case 10, including: a base body 400 and a heat exchange plate 500. The base 400 includes a bottom plate 410 and a side plate 420 disposed around an edge of the bottom plate 410, the bottom plate 410 and the side plate 420 are integrally formed, the bottom plate 410 has opposite top and

bottom walls

411 and 412, the side plate 420 has opposite outer and

inner walls

422 and 421, and the top and

inner walls

411 and 421 form a first mounting groove 401 for mounting a battery cell. One side of the heat exchanger plate 500 is provided with flow channels 501, and the heat exchanger plate 500 is connected to the bottom wall 412 with its side provided with flow channels 501.

The base body 400 is a tub-shaped structure for disposing the battery cells, and is internally formed with a first mounting groove 401 in which one or more battery cells can be arranged in a row.

The bottom plate 410 is a plate-shaped structure for providing a supporting force for the battery cells arranged in the first mounting groove 401, and after the battery cells are assembled in the battery box 10 to obtain a battery, the bottom plate 410 is located at the bottom of the battery cells according to the conventional arrangement direction of the battery.

The top wall 411 of the bottom plate 410 is a wall of the bottom plate 410 for forming the first mounting groove 401, and when the battery box 10 is assembled with a single battery to obtain a battery, the top wall 411 of the bottom plate 410 is an upper wall of the bottom plate 410 according to a conventional arrangement direction of the battery.

The bottom wall 412 of the bottom plate 410 is a wall opposite to the top wall 411, and when the battery box 10 is assembled with single batteries to obtain batteries, the top wall 411 of the bottom plate 410 is the lower wall of the bottom plate 410 according to the conventional arrangement direction of the batteries.

The side plate 420 is a plate-shaped structure for forming the first mounting groove 401 and providing a lateral barrier for the battery cell disposed in the first mounting groove 401 to prevent the battery cell from escaping from the first mounting groove 401.

The inner wall 421 of the side plate 420 refers to a wall of the side plate 420 for forming the first mounting groove 401, and when the battery case 10 is assembled with the battery cell to obtain the battery, the inner wall 421 of the side plate 420 is close to the battery cell.

The outer wall 422 of the side plate 420 is a wall opposite to the inner wall 421, and when the battery case 10 is assembled with the battery cell to obtain the battery, the outer wall 422 of the side plate 420 is far away from the battery cell.

The heat exchange plate 500 is a plate-shaped structure with at least one side having the flow channel 501 communicated with each other, when the heat exchange plate 500 is connected to the bottom wall 412 with the side having the flow channel 501, the flow channel 501 of the heat exchange plate 500 and the bottom wall 412 form a cooling channel capable of passing through cooling liquid, the cooling channel is provided with a liquid inlet and a liquid outlet of the cooling liquid, the cooling liquid can enter the cooling channel through the liquid inlet, and after heat exchange with a battery cell, the cooling liquid is discharged from the liquid outlet, and cooling of the battery cell is realized.

Due to the integrated structure of the base 400, there is no gap at the connection between the side plate 420 and the bottom plate 410, so that the base 400 itself has better sealing performance. And compare in the structure of frame-type, the leakproofness of integrated into one piece's base member 400 can be expected to can save the airtight detection behind the sealed detection of frame and the integrated cold plate, only need carry out the airtight detection of box assembly, simplify the detection in the assembling process greatly, reduce the detection cost of battery box 10. Meanwhile, the heat exchange plate 500 is directly integrated on the bottom wall 412 of the base 400, so that the battery case 10 has a higher integration level, and water cooling integration at other positions in the battery case 10 is avoided.

Alternatively, the base 400 is formed by a hot stamping process.

The means by which the heat exchanger plate 500 is attached to the bottom wall 412 of the base plate 410 include welding, gluing and some other means by which a sealed connection can be achieved.

The battery case 10 further includes a cover 600, and a portion having the base 400 and the heat exchange plate 500 can be covered with the cover 600. And the portion having the base body 400 and the heat exchange plate 500 and the cover body 600 together define a receiving space for receiving the battery cells. The cover body 600 may be a hollow structure with one end open, and the cover body 600 covers the open side of the base body 400, so that the cover body 600 and the base body 400 together define a receiving space. Of course, the battery case 10 formed with the portions of the base 400 and the heat exchange plate 500 and the cover 600 may have various shapes, for example, a cylindrical shape, a rectangular parallelepiped shape, etc.

In a possible embodiment, referring to fig. 3 to 4, optionally, the battery box 10 further includes a reinforcing frame 700, and the reinforcing frame 700 is attached to the outer wall 422 of the side plate 420.

The reinforcing frame 700 is a frame-shaped structure, and the height of the reinforcing frame 700 may be greater than the height of the side plate 420, may be smaller than the height of the side plate 420, and may be equal to the height of the side plate 420.

The reinforcing frame 700 of the present application serves to reinforce the strength of the side plate 420, and prevent the side plate 420 from being deformed after receiving the expansion force of the internal battery cell and the external mechanical force.

Alternatively, the reinforcing frame 700 is formed by connecting a plurality of reinforcing bars in sequence, for example, the reinforcing frame 700 may be formed by connecting a plurality of metal profiles in sequence by using a connecting member such as a bolt or a welding connection manner.

Optionally, the reinforcing frame 700 is integrally formed.

In one possible embodiment, optionally, the battery case 10 further includes a connecting member 710, the side plate 420 has a first connecting hole 423, the reinforcing frame 700 has a second connecting hole 701, and the connecting member 710 passes through the first connecting hole 423 and the second connecting hole 701 to connect the reinforcing frame 700 to the side plate 420.

The connector 710 is a bar-shaped or cylindrical structure capable of coupling the reinforcing frame 700 to the side plate 420 through the first coupling hole 423 and the second coupling hole 701, and for example, the connector 710 may be a rivet, a screw, a bolt, or the like.

Optionally, the connector 710 is a rivet.

In the battery case 10 according to the embodiment of the present application, the reinforcing frame 700 and the side plate 420 may be stably connected by the connecting member 710.

In one possible embodiment, optionally, the battery case 10 further includes a connector 710, the side plate 420 includes a plate body 425 and a flange 424 disposed at the top of the plate body 425 and disposed toward the bottom plate 410, the flange 424 has a first connection hole 423, a second mounting groove is formed between the flange 424 and the plate body 425, the top of the reinforcing frame 700 has a second connection hole 701, the top of the reinforcing frame 700 is disposed in the second mounting groove, and the connector 710 passes through the first connection hole 423 and the second connection hole 701 to connect the reinforcing frame 700 to the side plate 420.

The plate body 425 is a main body portion of the side plate 420, which has an inner wall 421 and an outer wall 422.

The flange 424 is an extension of the side plate 420 and forms a second mounting groove with a U-shaped cross-section with the outer wall 422 of the plate body 425.

When the reinforcing frame 700 is installed, the top of the reinforcing frame 700 is installed in the second installation groove, so that the reinforcing frame 700 is connected with the base 400 before the connecting piece 710 is connected, and finally, the connecting piece penetrates through the first connecting hole 423 and the second connecting hole 701 to realize the stable connection of the reinforcing frame 700 to the side plate 420. Moreover, the first connection hole 423 is formed in the flange 424, so that the structure of the plate 425 is not damaged, the plate 425 can maintain high strength, and the sealing performance of the base 400 is not affected.

Optionally, the cuff 424 includes a first portion and a second portion, the second portion being parallel to the outer wall 422 of the plate 425, the first portion having opposite ends, the ends of the first portion being connected to the outer wall 422 and the second portion of the plate 425, respectively.

In one possible implementation, referring alternatively to fig. 8, fig. 8 is a top view of the assembled base, heat exchanger plates and reinforcing frames of some embodiments of the present application. The reinforcing frame 700 is bonded and/or welded to the base 400.

In the battery case 10 according to the embodiment of the present invention, the reinforcing frame 700 and the base 400 may be stably connected only by bonding, and in this connection, the bonding position between the reinforcing frame 700 and the base 400 may be a portion where the reinforcing frame 700 and the outer wall 422 of the side plate 420 are bonded, a position where the bottom of the reinforcing frame 700 and the bottom of the base 400 are in contact, or a position where the top of the reinforcing frame 700 and the top of the base 400 are in contact.

The reinforcing frame 700 and the base 400 may be stably connected only by welding, and in this connection, the position where the reinforcing frame 700 and the base 400 are welded may be a portion where the reinforcing frame 700 and the outer wall 422 of the side plate 420 are attached to each other, a position where the bottom of the reinforcing frame 700 and the bottom of the base 400 are in contact with each other, or a position where the top of the reinforcing frame 700 and the top of the base 400 are in contact with each other.

The reinforcing frame 700 and the base 400 can be stably connected by bonding and welding, in this connection mode, the bonding position of the reinforcing frame 700 and the base 400 can be the joint part of the reinforcing frame 700 and the outer wall 422 of the side plate 420, and the welding position of the reinforcing frame 700 and the base 400 can be the contact position of the bottom of the reinforcing frame 700 and the bottom of the base 400.

The reinforcing frame 700 and the base 400 may be stably connected by connecting and bonding the connecting member 710, in which the connecting member 710 sequentially passes through the second connecting hole 701 and the first connecting hole 423, and the position where the reinforcing frame 700 and the base 400 are bonded may be a portion where the reinforcing frame 700 and the outer wall 422 of the side plate 420 are attached.

The reinforcing frame 700 and the base body 400 may be stably connected by connecting the connecting member 710 and welding, in which the connecting member 710 sequentially passes through the second connecting hole 701 and the first connecting hole 423, and the welding position of the reinforcing frame 700 and the base body 400 may be a position where the bottom of the reinforcing frame 700 and the bottom of the base body 400 are in contact.

The reinforcing frame 700 and the base 400 can be stably connected through three ways of connection, bonding and welding through the connecting member 710, in this connection way, the bonding position of the reinforcing frame 700 and the base 400 can be the joint part of the reinforcing frame 700 and the outer wall 422 of the side plate 420, the welding position of the reinforcing frame 700 and the base 400 can be the contact position of the bottom of the reinforcing frame 700 and the bottom of the base 400, and the welding position of the reinforcing frame 700 and the base 400 can be the contact position of the bottom of the reinforcing frame 700 and the bottom of the base 400.

When the reinforcing frame 700 is connected to the base 400 by bonding, an adhesive is applied to the bonding position, and then the reinforcing frame 700 is connected to the base 400 in a predetermined manner. For example, before the connection, an adhesive may be applied to the outer wall 422 of the side plate 420, and then the reinforcing frame 700 may be attached to the outer wall 422 of the side plate 420. The welding may be performed by welding, such as brazing, welding by segment or laser.

In one possible embodiment, the reinforcing frame 700 is optionally bonded to the outer wall 422 of the side panel 420.

The specific surface area of the outer wall 422 of the side plate 420 is large, and when the reinforcing frame 700 is attached to the outer wall 422 of the side plate 420, the reinforcing frame 700 and the outer wall 422 of the side plate 420 have a large bonding area, so that the reinforcing frame 700 and the base 400 are stably connected in a bonding manner.

In one possible embodiment, optionally, the bottom of the reinforcement frame 700 and the bottom of the base 400 are welded.

After the reinforcing frame 700 is attached to the outer wall 422 of the side plate 420, the bottom of the reinforcing frame 700 and the bottom of the base 400 are directly welded, so that the welding is very convenient and fast, and the welded structure is stable.

In one possible embodiment, the material of the reinforcing frame 700 is aluminum or aluminum alloy.

The reinforcing frame 700 made of aluminum or an aluminum alloy can reduce the overall weight of the battery case 10, making the battery case 10 more lightweight, thereby improving the energy density of the entire battery.

In one possible embodiment, the material of the substrate 400 is aluminum or aluminum alloy.

The use of aluminum or an aluminum alloy for the base 400 reduces the overall weight of the battery case 10, making the battery case 10 more lightweight, thereby increasing the energy density of the entire battery.

In a possible embodiment, the material of the heat exchange plate 500 is aluminum, aluminum alloy or plastic.

The heat exchange plate 500 made of aluminum, aluminum alloy or plastic can reduce the overall weight of the battery case 10, making the battery case 10 more lightweight, thereby improving the energy density of the entire battery.

In one possible embodiment, the battery case 10 further includes a bottom cover 800, and the bottom cover 800 is connected to the reinforcing frame 700 and/or the bottom of the base 400.

The bottom plate 800 has a plate-shaped structure, which has the same or similar shape as the bottom plate 410 of the base 400, and is used to reinforce the strength of the bottom of the heat exchange plate 500.

Optionally, the bottom cover sheet 800 has a plurality of grooves that are form-fit to the bottom of the heat exchanger plate 500.

When the bottom of the reinforcing frame 700 is flush with the bottom of the side plate 420, the bottom protection plate 800 is connected to the reinforcing frame 700 and the bottom of the base 400; when the bottom of the reinforcing frame 700 protrudes from the bottom of the side plate 420, the bottom protection plate 800 is connected to the bottom of the reinforcing frame 700; when the bottom of the side plate 420 protrudes from the bottom of the reinforcing frame 700, the bottom protection plate 800 is connected to the bottom of the base 400.

The bottom guard plate 800 is used to prevent bottom penetration and bottom stone impact, so that the battery cells in the battery case 10 maintain a stable state.

In a possible implementation manner, optionally, please refer to fig. 9, and fig. 9 is a partial schematic view of a battery box according to some embodiments of the present application. The battery case 10 further includes a cross member 920 and a fixing beam 910 for defining the battery cell, and the cross member 920 and the fixing beam 910 are disposed in the first mounting groove 401.

The side plate 420 includes long sides and short sides, recessed grooves 402 are respectively formed in positions near the two long sides in the first mounting groove 401, and two cross beams 920 are respectively disposed in the two recessed grooves 402.

The two fixing beams 910 are respectively disposed in the first mounting groove 401 at positions close to the two short sides, the two fixing beams 910 are suspended, and two ends of the fixing beams 910 in the transverse direction are respectively connected to two long sides of the side plate 420.

The cross beam 920 and the fixing beam 910 can constrain the position of the battery cell in the first mounting groove 401, wherein the fixing beam 910 is used for constraining the battery cell and limiting the free expansion of the battery cell.

Optionally, the battery box 10 further includes a dividing beam disposed in the first mounting groove 401, and the dividing beam is used to divide a plurality of rows, a plurality of columns, or a plurality of battery cells.

According to some embodiments of the present application, referring to fig. 3-9, the present application provides a battery case 10 comprising: base body 400, heat exchange plate 500, reinforcing frame 700 and bottom protective plate 800. The base 400 includes a bottom plate 410 and a side plate 420 disposed around an edge of the bottom plate 410, the bottom plate 410 and the side plate 420 being integrally formed through a hot stamping process, the bottom plate 410 having opposite top and

bottom walls

411 and 412, the side plate 420 having opposite outer and

inner walls

422 and 421, the top and

inner walls

411 and 421 forming a first mounting groove 401 for mounting a battery cell. The side plate 420 includes long sides and short sides, recessed grooves 402 are respectively formed in positions near the two long sides in the first mounting groove 401, and a cross beam 920 is respectively disposed in the two recessed grooves 402. The two fixing beams 910 are respectively disposed in the first mounting groove 401 at positions close to the two short sides, the two fixing beams 910 are suspended, and two ends of the fixing beams 910 in the transverse direction are respectively connected to two long sides of the side plate 420. One side of the heat exchanger plate 500 is provided with flow channels 501 and the heat exchanger plate 500 is brazed to the bottom wall 412 with the side of the heat exchanger plate provided with flow channels 501, thereby forming cooling channels through which a cooling liquid can pass. The battery box body 10 further comprises a connecting piece 710, the side plate 420 comprises a plate body 425 and a flange 424 which is arranged at the top of the plate body 425 and arranged towards the bottom plate 410, the flange 424 is provided with a first connecting hole 423, a second mounting groove is formed between the flange 424 and the plate body 425, the top of the reinforcing frame 700 is provided with a second connecting hole 701, before the reinforcing frame 700 is assembled, adhesive is coated on the outer wall 422 of the side plate 420, then the top of the reinforcing frame 700 is arranged in the second mounting groove, the reinforcing frame 700 is adhered to the outer wall 422 of the side plate 420, meanwhile, the connecting piece 710 penetrates through the first connecting hole 423 and the second connecting hole 701 to enable the reinforcing frame 700 to be connected to the side plate 420, and finally the bottom of the reinforcing frame 700 and the bottom of the base body 400 are welded. The bottom sheathing panel 800 is coupled to the reinforcing frame 700 and the bottom of the base 400. The base 400, the heat exchange plate 500 and the reinforcing frame 700 are made of aluminum.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

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

the base body comprises a bottom plate and a side plate arranged around the edge of the bottom plate, the bottom plate and the side plate are integrally formed, the bottom plate is provided with a top wall and a bottom wall which are opposite, the side plate is provided with an outer wall and an inner wall which are opposite, and a first mounting groove for mounting a battery monomer is formed by the top wall and the inner wall;

and one surface of the heat exchange plate is provided with a flow channel, and the surface of the heat exchange plate provided with the flow channel is connected to the bottom wall.

2. The battery box body as claimed in claim 1, further comprising a reinforcing frame attached to an outer wall of the side plate.

3. The battery case according to claim 2, further comprising a connector, wherein the side plate has a first coupling hole, and the reinforcing frame has a second coupling hole, and wherein the connector passes through the first coupling hole and the second coupling hole to connect the reinforcing frame to the side plate.

4. The battery box body as claimed in claim 2, further comprising a connecting member, wherein the side plate comprises a plate body and a flange disposed on the top of the plate body and disposed toward the bottom plate, the flange has a first connecting hole, a second mounting groove is formed between the flange and the plate body, a second connecting hole is disposed on the top of the reinforcing frame, the top of the reinforcing frame is disposed in the second mounting groove, and the connecting member passes through the first connecting hole and the second connecting hole to connect the reinforcing frame to the side plate.

5. The battery box body as claimed in any one of claims 2 to 4, wherein the reinforcing frame is bonded and/or welded to the base body.

6. The battery box body according to claim 5, wherein the reinforcing frame is bonded to an outer wall of the side plate.

7. The battery case according to claim 5, wherein a bottom of the reinforcing frame and a bottom of the base are welded.

8. The battery box body according to any one of claims 2 to 4, wherein the reinforcing frame is made of aluminum or aluminum alloy.

9. The battery case according to any one of claims 1 to 4, wherein the base is made of aluminum or an aluminum alloy.

10. The battery box body according to any one of claims 1 to 4, wherein the heat exchange plate is made of aluminum, aluminum alloy or plastic.

11. The battery case of claim 2, further comprising a bottom guard plate attached to the reinforcing frame and/or the bottom of the base.

12. The battery box body as claimed in any one of claims 1 to 4, wherein the battery box body further comprises a cross beam and a fixing beam for limiting a battery cell, and the cross beam and the fixing beam are both arranged in the first mounting groove.

13. A battery, characterized in that, the battery includes battery monomer and claim 1 ~ 12 any one the battery box, battery monomer sets up in first mounting groove.

14. An electric device, characterized in that the electric device comprises a battery according to claim 13 for providing electric energy.