Battery device and vehicle

Abstract

The utility model discloses a battery device and a vehicle, the battery device comprises a box body and a plurality of battery monomer components, the plurality of battery monomer components are arranged in the box body and are arranged along the longitudinal direction of the vehicle, each battery monomer component comprises an end plate and at least one row of battery monomer row, each battery monomer row comprises a plurality of battery monomers arranged in the transverse direction of the vehicle, the end plates are located on the two opposite sides of the battery monomer assembly in the transverse direction of the vehicle, and the thickness direction of the battery monomers is consistent with the second direction. According to the battery device and the arrangement mode of the battery monomers of the battery device, the longitudinal and transverse spaces of the vehicle can be fully utilized, so that the arrangement of the plurality of battery monomers is more compact, the electric capacity of the battery device is favorably improved, and the sizes of the battery monomers and the end plates are more flexible.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially is related to a battery device and vehicle. BACKGROUND

[0002] In the related art, the vehicle using the battery device as the power is usually installed at the bottom of the vehicle. However, when the battery device in the related art is installed at the bottom of the vehicle, the arrangement of the battery monomer in the battery device limits the further improvement of the capacity of the battery device. Therefore, how to further optimize the arrangement of the battery monomer in the battery device to further utilize the space at the bottom of the vehicle to improve the endurance of the battery device is a technical problem to be solved. SUMMARY

[0003] In view of the above problems, the utility model provides a battery device and vehicle, when the battery device is installed in the vehicle, the arrangement of the battery monomer of the battery device can more fully utilize the longitudinal and transverse space of the vehicle, so that the arrangement of the plurality of battery monomers is more compact, which is beneficial to improve the capacity of the battery device, and the size of the battery monomer and the end plate is more flexible.

[0004] In the first aspect, the utility model provides a battery device, the battery device is used for installing at the bottom of the vehicle, and the battery device comprises: a box body; a plurality of battery monomer assemblies, a plurality of battery monomer assemblies are arranged in the box body, and a plurality of battery monomer assemblies are arranged along the first direction, each battery monomer assembly comprises an end plate and at least one column of battery monomer rows, each column of battery monomer rows comprises a plurality of battery monomers arranged along the second direction, the end plate is located at the opposite sides of the battery monomer assembly along the second direction, the thickness direction of the battery monomer is consistent with the second direction, the first direction is consistent with the longitudinal direction of the vehicle, and the second direction is consistent with the transverse direction of the vehicle.

[0005] In the technical solution, the battery device is arranged to include a plurality of battery cell assemblies arranged along the longitudinal direction of the vehicle, so that the longitudinal space of the vehicle can be fully utilized, the capacity of the battery device is improved, and the endurance is improved. In addition, the plurality of battery cells in each row of battery cells in the battery cell assembly are arranged along the transverse direction of the vehicle, so that the thickness direction of the battery cells is consistent with the transverse direction of the vehicle. This arrangement can fully utilize the transverse space of the vehicle while reducing the size limitation of the battery cells, so that the size of the battery cells can be set more flexibly. In addition, the end plates are arranged on both sides of the battery cell assembly along the transverse direction of the vehicle, so that the end plates of the battery cell assembly can be arranged at both ends of the vehicle in the transverse direction, the transverse space of the vehicle can be fully utilized, the end plates occupy less longitudinal space of the vehicle, and the longitudinal space of the vehicle can be more fully utilized to place the battery cells, so that the arrangement of the plurality of battery cells in the battery device is more compact, which is beneficial to improve the capacity of the battery device, and the size limitation of the end plates can be reduced, so that the size of the end plates can be set flexibly.

[0006] In some embodiments, the battery cell assembly includes a plurality of rows of battery cell rows arranged in the first direction, and the plurality of rows of battery cell rows of the same battery cell assembly correspond to the same end plate on the same side in the second direction.

[0007] In the technical solution, the plurality of rows of battery cell rows in the same battery cell assembly share the end plate, so that the plurality of rows of battery cell rows in the same battery cell assembly can be connected into a whole through the end plate, and the vibration offset of the adjacent two rows of battery cell rows in the same battery cell assembly in the Z direction can be reduced to avoid damage to the battery cells. In addition, the number of end plates can be reduced, the assembly process of the battery device can be reduced, and the assembly efficiency of the battery device can be improved.

[0008] In some embodiments, the battery cell assembly includes two rows of battery cell rows arranged in the first direction, and the two rows of battery cell rows of the same battery cell assembly correspond to the same end plate on the same side in the second direction.

[0009] In the technical solution, the battery cell assembly is arranged to include two rows of battery cell rows, and the two rows of battery cell rows in the battery cell assembly share the end plate. In this way, the vibration offset of the adjacent two rows of battery cell rows in the same battery cell assembly in the Z direction can be reduced to avoid damage to the battery cells, and each row of battery cells can be subjected to sufficient restraint force to avoid vibration damage due to insufficient restraint force, so that the overall structural strength and rigidity of the battery cell assembly are improved.

[0010] In some embodiments, the battery cell assembly comprises a pressing strip, the pressing strip is arranged at the top of the battery cell row, and at least part of the pressing strip is located on the upper surface of the battery cell, and the pressing strip is connected with the end plate.

[0011] In the above technical solution, by arranging the pressing strip at the top of the battery cell row and connecting the pressing strip with the end plate, the structural strength and the anti-expansion force of the battery cell assembly can be effectively improved.

[0012] In some embodiments, the two ends of the length direction of the pressing strip are respectively connected with the end plates located on both sides of the battery cell row along the second direction.

[0013] In the above technical solution, by connecting the two ends of the length direction of the pressing strip with the end plates on both sides of the battery cell row respectively, the structural strength and the anti-expansion force of the battery cell assembly can be more effectively improved.

[0014] In some embodiments, the pressing strip is detachably connected with the end plate.

[0015] In the above technical solution, by detachably connecting the pressing strip with the end plate, the replacement and maintenance of the end plate are facilitated.

[0016] In some embodiments, the pressing strip is connected with the end plate through a fastener.

[0017] In the above technical solution, the end of the pressing strip is connected with the end plate by using a fastener, so that the connection between the pressing strip and the end plate is more reliable and stable.

[0018] In some embodiments, the battery cell row is provided with the pressing strip at least at one end in the first direction.

[0019] In the above technical solution, by arranging the pressing strip at least at one end of the battery cell row in the first direction, the end of the battery cell in the first direction can be effectively limited.

[0020] In some embodiments, the pressing strip is arranged at one end of each of the two adjacent battery cell rows in the same battery cell assembly.

[0021] In the above technical solution, by arranging the pressing strip at one end of each of the two adjacent battery cell rows in the same battery cell assembly, the vibration offset of the two adjacent battery cell rows in the Z direction in the same battery cell assembly can be better reduced, which can cause damage to the battery cell.

[0022] In some embodiments, one end of each of the two adjacent battery cell rows in the same battery cell assembly is pressed by the same pressing strip.

[0023] In the technical scheme, the same pressing strip is used to press the adjacent ends of the two adjacent battery cell rows in the same battery cell assembly, so that the vibration offset of the two adjacent battery cell rows in the same battery cell assembly in the Z direction can be further effectively reduced, the damage of the battery cells can be avoided, and the number of the pressing strips can be reduced, thereby reducing the mounting process of the pressing strips and improving the overall assembly efficiency of the battery cell assembly.

[0024] In some embodiments, the top of the battery cell is provided with a pole and / or a pressure relief valve, and the pressing strip is arranged away from the pole and / or the pressure relief valve.

[0025] In the technical scheme, the pressing strip is arranged away from the pole and / or the pressure relief valve arranged on the top of the battery cell, so that the remaining space on the top of the battery cell can be fully utilized, and the influence of the pressing strip on the pole or the pressure relief valve can be reduced or avoided.

[0026] In some embodiments, the pressing strip is connected to the battery cell through a first adhesive layer.

[0027] In the technical scheme, the pressing strip is fixedly connected to the battery cell through the first adhesive layer, so that the connection between the pressing strip and the battery cell is convenient and stable.

[0028] In some embodiments, the shell of the battery cell includes a housing and an insulating film wrapped on the outer surface of the housing, a portion of the insulating film located on the top of the housing is formed with a window, the portion of the housing opposite to the window constitutes a fixing portion, and the pressing strip is connected to the fixing portion.

[0029] In the technical scheme, the window is arranged on the top of the battery cell, so that the housing of the battery cell is exposed to facilitate the connection between the pressing strip and the exposed portion of the housing. Since the housing is a metal piece and has a relatively large thickness compared with the insulating film, the pressing strip can be directly connected to the housing with high structural strength, and the connection strength between the pressing strip and the battery cell can be improved.

[0030] In some embodiments, the pressing strip includes a pressing strip body, the pressing strip body includes a first metal framework and a first insulating layer, and the first insulating layer is wrapped on the outer surface of the first metal framework.

[0031] In the technical scheme, the pressing strip includes the first metal framework and the first insulating layer wrapped on the first metal framework, so that the overall structural strength of the pressing strip is high, the Z-direction vibration of the battery cell can be effectively limited by the pressing strip, the overall structural strength and the anti-expansion force of the battery cell assembly can be improved, and the electrical contact between the pressing strip and the battery cell can be avoided, thereby improving the safety.

[0032] In some embodiments, two ends of the first metal skeleton are exposed outside the first insulating layer and constitute fixed ends, and the fixed ends are connected with the end plate.

[0033] In the above technical solution, when the bead includes the first metal skeleton and the first insulating layer covering the first metal skeleton to improve the overall structural strength and anti-expansion force of the bead, the two ends of the first metal skeleton of the bead that are not covered by the first insulating layer are connected with the end plate, so that the connection strength of the bead and the end plate is high and the connection stability is high.

[0034] In some embodiments, the bead further includes a bead seat fixed to the top of the battery monomer, and the bead body is fixed to the bead seat.

[0035] In the above technical solution, by making the bead include a bead seat fixed to the top of the battery monomer, and making the bead body including the first metal skeleton and the first insulating layer covering the first metal skeleton fixed in the bead seat, the installation and fixation of the bead body are facilitated, and the overall structural strength of the bead is also high.

[0036] In some embodiments, the bead seat is a composite material piece.

[0037] In the above technical solution, by setting the bead seat as a composite material piece, the bead seat can have good structural strength and relatively light weight.

[0038] In some embodiments, the bead seat is a pultruded composite material piece.

[0039] In the above technical solution, by setting the bead as a pultruded composite material piece, it is more convenient to form a long strip-shaped bead using a pultrusion composite process, and the forming efficiency and forming quality are high, so that the bead is firm, light and durable.

[0040] In some embodiments, the bead body and the bead seat are connected through a second adhesive layer.

[0041] In the above technical solution, by bonding and fixing the bead body on the bead seat, the installation and fixation of the bead body are facilitated and the connection stability is also high.

[0042] In some embodiments, the bead seat is formed with an accommodating groove extending along the length direction of the bead seat, and the bead body is accommodated in the accommodating groove.

[0043] In the technical solution, the accommodating groove is arranged in the pressing strip seat, and the pressing strip body is installed in the accommodating groove, so that the pressing strip body is conveniently limited when being installed on the pressing strip seat, the size of the pressing strip in the thickness or width direction of the pressing strip is reduced, the space occupied by the pressing strip is reduced, and the overall energy density of the battery device is improved.

[0044] In some embodiments, the accommodating groove is formed on the upper surface of the pressing strip seat.

[0045] In the technical solution, the accommodating groove is arranged on the upper surface of the pressing strip seat, the pressing strip body is conveniently installed downward into the accommodating groove of the pressing strip seat, the space occupied by the pressing strip in the Z direction is reduced, and the space occupied by the battery device in the Z direction is reduced.

[0046] In some embodiments, the battery monomer assembly further comprises a binding belt, and the binding belt is bound on the outer circumferential side of the same battery monomer assembly.

[0047] In the technical solution, the binding belt is bound on the outer circumferential side of the same battery monomer assembly, so that the overall structural strength, rigidity and anti-expansion capability of the battery monomer assembly are further improved.

[0048] In some embodiments, the binding belt is a plurality of binding belts, and the plurality of binding belts are arranged at intervals in the height direction of the same battery monomer assembly.

[0049] In the technical solution, the plurality of binding belts are arranged at intervals in the height direction of the same battery monomer assembly and are bound on the outer circumferential side of the same battery monomer assembly, and the overall structural strength, rigidity and anti-expansion capability of the battery monomer assembly are improved through the binding force of the plurality of binding belts.

[0050] In some embodiments, the binding belt comprises a second metal framework and a second insulating layer, and the second insulating layer is wrapped on the outer surface of the second metal framework.

[0051] In the technical solution, the binding belt comprises the second metal framework and the second insulating layer wrapped on the second metal framework, so that the binding belt has high structural strength, the binding belt has high binding force, and the binding belt is insulated from the battery monomer, and safety is improved.

[0052] In some embodiments, the second metal framework is formed as a long strip-shaped metal belt.

[0053] In the technical solution, the second metal framework is formed into a long strip-shaped metal belt, so that the overall structural strength of the pressing strip is better, the binding force is higher, and the overall structural strength, rigidity and anti-expansion capability of the battery monomer assembly can be effectively improved.

[0054] In some embodiments, a ratio of a dimension of the case in the up-down direction to a dimension of the case in the second direction is less than 0.3.

[0055] In the technical solution, the dimension of the case in the up-down direction is small, so that the battery device is flat, the overall capacity of the battery device is large, the space occupied by the battery device in the Z direction is small, the height of the bottom surface of the battery device is not too low, and the risk of damage to the battery device is reduced.

[0056] In a second aspect, the utility model provides a kind of vehicle, comprising: the battery device of the second embodiment of the utility model.

[0057] In the technical solution, the longitudinal and lateral space of the vehicle can be more fully utilized, the arrangement of the plurality of battery monomers is more compact, the capacity of the battery device is improved, and the size of the battery monomer and the end plate is more flexible, so that the driving range of the vehicle is improved.

[0058] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood by the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0059] The above and / or additional aspects and advantages of the utility model will become apparent and more readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0060] Figure 1 is a schematic diagram of a battery device according to some embodiments of the utility model;

[0061] Figure 2 is Figure 1 is an exploded view of the battery device in

[0062] Figure 3 is Figure 1 is a partial structural schematic diagram of the battery device in

[0063] Figure 4 is Figure 1schematic view of a single battery cell assembly in the battery device in

[0064] Figure 5 is Figure 1 schematic view of a pressing strip in the battery device in

[0065] Figure 6 is Figure 5 front view of the pressing strip in the battery device in

[0066] Figure 7 is sectional view along line A-A in the battery device in Figure 6

[0067] Figure 8 is Figure 1 schematic view of an end plate in the battery device in

[0068] Figure 9 is a schematic view of a vehicle according to some embodiments of the present application.

[0069] Reference Signs:

[0070] 1000, vehicle;

[0071] 100, battery device;

[0072] 10, box body; 11, bottom plate; 12, mounting beam; 13, top cover;

[0073] 20, battery cell assembly;

[0074] 30, battery cell row; 301, battery cell; 31, pole; 32, pressure relief valve; 33, shell; 331, housing; 332, fixed part; 333, insulating film; 334, window;

[0075] 40, end plate; 41, hollow cavity; 42, first side wall; 43, second side wall; 44, reinforcing rib;

[0076] 50, pressing strip; 51, pressing strip main body; 511, first metal framework; 512, first insulating layer; 513, fixed end; 52, pressing strip seat; 521, accommodating groove; 53, second adhesive layer; 54, fastener;

[0077] 60, binding belt;

[0078] 200, vehicle body. DETAILED DESCRIPTION

[0079] ​In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0080] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing the specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" in the specification and claims of the present application and the above description of drawings are intended to cover the non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application or the above description of drawings are used to distinguish different objects, and are not used to describe a specific order or primary and secondary relationship.

[0081] In the present application, "embodiment" means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments.

[0082] In the description of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "attachment" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0083] In the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects have an "or" relationship.

[0084] In the embodiments of the present application, the same reference signs represent the same components, and for the sake of brevity, the detailed description of the same components is omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, and the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation on the present application.

[0085] In the present application, "a plurality of" means two or more (including two).

[0086] In the embodiments of the present application, all embodiments and optional embodiments of the present application can be combined to form new technical solutions if not specifically stated.

[0087] In the embodiments of the present application, all technical features and optional technical features of the present application can be combined to form new technical solutions if not specifically stated.

[0088] In the embodiments of the present application, the battery apparatus (Battery Apparatus) can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) can include a plurality of battery cells connected in series, parallel or mixed connection through a busbar component. For example, the battery cell assembly (Battery Cell Assembly) is usually formed by arranging a plurality of battery cells; the battery cell assembly can be a battery module (Battery Module), and the battery module is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module can be bundled by a cable tie.

[0089] The battery apparatus can be a battery pack (battery Pack), which includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body. The battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box body by fixing the battery module in the box body; the battery cell assembly can also be accommodated in the box body by directly fixing a plurality of battery cells in the box body.

[0090] In the embodiments of the present application, the box body can include a first box body and a second box body. The first box body and the second box body are buckled to form a closed space inside the box body to accommodate the battery cell assembly. Here, closed means covered or closed, which can be sealed or unsealed. The first box body can be a top cover or a bottom plate. For example, the box body can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are connected with the frame respectively, so that the closed space is formed inside the box body to accommodate the battery cell assembly.

[0091] In embodiments of the present application, the box can be part of the chassis structure of the vehicle. For example, part of the box can be at least part of the floor of the vehicle, or part of the box can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0092] In embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging; the battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc. The embodiments of the present application are not limited in this regard. The battery cell can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc. The embodiments of the present application are not limited in this regard. The battery cell is generally divided into three types according to the packaging method: cylindrical battery cell, square battery cell and soft pack battery cell. The embodiments of the present application are not limited in this regard.

[0093] At present, from the development of market situation, the application of battery is more and more widely. The battery is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the market demand is also increasing.

[0094] In the related art, the vehicle using the battery device as the power source usually installs the battery device at the bottom of the vehicle. However, when the battery device in the related art is installed at the bottom of the vehicle, the arrangement of the battery cells in the battery device limits the further improvement of the capacity of the battery device. Therefore, how to further optimize the arrangement of the battery cells in the battery device to further utilize the space at the bottom of the vehicle to improve the endurance of the battery device is a technical problem to be solved.

[0095] Therefore, the present application provides a battery device for installation at the bottom of a vehicle, and the battery device comprises: a box and a plurality of battery cell assemblies, the plurality of battery cell assemblies are arranged in the box, and the plurality of battery cell assemblies are arranged along a first direction, each battery cell assembly comprises an end plate and at least one row of battery cell rows, each row of battery cell rows comprises a plurality of battery cells arranged along a second direction, the end plate is located on the opposite sides of the battery cell assembly along the second direction, the thickness direction of the battery cell is consistent with the second direction, the first direction is consistent with the longitudinal direction of the vehicle, and the second direction is consistent with the transverse direction of the vehicle.

[0096] In the battery device, by arranging the battery device to include a plurality of battery cell assemblies arranged along the longitudinal direction of the vehicle, the longitudinal space of the vehicle can be fully utilized, the capacity of the battery device can be improved, and the endurance capability can be improved; and by arranging the plurality of battery cells in each row of battery cell rows in the battery cell assembly along the transverse direction of the vehicle, the thickness direction of the battery cells is consistent with the transverse direction of the vehicle, so that the size of the battery cells can be limited while the transverse space of the vehicle is fully utilized, so that the size of the battery cells can be set more flexibly; in addition, by arranging the end plates on both sides of the battery cell assembly along the transverse direction of the vehicle, the end plates of the battery cell assembly can be arranged at both ends of the transverse direction of the vehicle, the transverse space of the vehicle can be fully utilized, the end plates can occupy less longitudinal space of the vehicle, the longitudinal space of the vehicle can be more fully utilized to place the battery cells, the arrangement of the plurality of battery cells in the battery device is more compact, which is beneficial to improve the capacity of the battery device, and the size of the end plates can be limited, so that the size of the end plates can be set flexibly.

[0097] The vehicle according to the embodiments of the present application can be a new energy vehicle, which can be a pure electric vehicle, a hybrid vehicle or a range extended vehicle. The vehicle is internally provided with a battery device, which can be arranged at the bottom of the vehicle. The battery device can be used for power supply of the vehicle, for example, can be used as a driving power source of the vehicle, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle. The battery device can not only be used as a driving power source of the vehicle, but also be used as an operating power source of the vehicle. The vehicle can further include a controller and a motor, and the controller is used to control the battery device to supply power to the motor, for example, to meet the power demand of the vehicle during starting, navigation and driving.

[0098] Reference will be made to Figures 1-8 The battery device 100 according to the embodiments of the present application is described.

[0099] Reference Figures 1-3 In a first aspect, the present application provides a battery device 100, which is arranged at the bottom of a vehicle 1000. The battery device 100 includes a box body 10 and a plurality of battery cell assemblies 20. The plurality of battery cell assemblies 20 are arranged in the box body 10, and the plurality of battery cell assemblies 20 are arranged along a first direction. Each battery cell assembly 20 includes an end plate 40 and at least one row of battery cell rows 30. Each row of battery cell rows 30 includes a plurality of battery cells 301 arranged along a second direction. The end plate 40 is located on opposite sides of the battery cell assembly 20 along the second direction. The thickness direction of the battery cell 301 is consistent with the second direction. The first direction is consistent with the longitudinal direction of the vehicle 1000. The second direction is consistent with the transverse direction of the vehicle 1000.

[0100] The end plates 40 are provided on opposite sides of the battery cell assembly 20 in the second direction, and are configured to suppress swelling and deformation of the battery cells 301. The end plates 40 are provided on opposite sides of the battery cell assembly 20 in the second direction means that the end plates 40 are arranged on one side of the battery cell assembly 20 in the second direction and on the other side of the battery cell assembly 20 in the second direction.

[0101] Each battery cell assembly 20 includes at least one row of battery cell rows 30, and can include, for example, a case in which the battery cell assembly 20 includes one battery cell row 30, and another case in which the battery cell assembly 20 includes a plurality of battery cell rows 30 arranged in the first direction.

[0102] For example, the battery cell 301 can have a rectangular parallelepiped shape, and the thickness direction of the battery cell 301 can be a direction in which the smallest dimension among the three dimensions of length, width, and height of the battery cell 301 is present.

[0103] At least a portion of the case 10 of the battery device 100 can be made of a metal material, so that the case 10 has high structural strength. For example, the case 10 can be a steel member, and the case 10 can also be an aluminum alloy member.

[0104] The first direction can be referred to as the X direction in the drawings, and the second direction can be referred to as the Y direction in the drawings.

[0105] The longitudinal direction of the vehicle 1000 is a direction in which the head and the tail of the vehicle 1000 are arranged, the lateral direction of the vehicle 1000 is perpendicular to the longitudinal direction of the vehicle 1000 and perpendicular to the up-down direction, and the up-down direction can be referred to as the Z direction in the drawings.

[0106] In the above technical solution, by arranging the battery device 100 to include a plurality of battery monomer assemblies 20 arranged along the longitudinal direction of the vehicle 1000, the longitudinal space of the vehicle 1000 can be fully utilized, the capacity of the battery device 100 can be improved, and the endurance capability can be improved. In addition, by arranging the plurality of battery monomers 301 in each column of battery monomer rows 30 in the battery monomer assembly 20 along the transverse direction of the vehicle 1000, the thickness direction of the battery monomer 301 is consistent with the transverse direction of the vehicle 1000. This arrangement can fully utilize the transverse space of the vehicle 1000 while reducing the size limitation of the battery monomer 301, making the size of the battery monomer 301 more flexible. In addition, by arranging the end plate 40 on both sides of the battery monomer assembly 20 along the transverse direction of the vehicle 1000, the end plates 40 of the battery monomer assembly 20 can be arranged at both ends of the vehicle 1000 in the transverse direction, fully utilizing the transverse space of the vehicle 1000, reducing the occupation of the end plate 40 in the longitudinal space of the vehicle 1000, and making the longitudinal space of the vehicle 1000 more fully utilized to place the battery monomer 301, so that the arrangement of the plurality of battery monomers 301 in the battery device 100 is more compact, which is beneficial to improve the capacity of the battery device 100, and can also reduce the size limitation of the end plate 40, making the size of the end plate 40 more flexible.

[0107] In some embodiments, referring to Figure 3 and Figure 4 , the battery monomer assembly 20 includes a plurality of battery monomer rows 30 arranged in a first direction, and the plurality of battery monomer rows 30 of the same battery monomer assembly 20 correspond to the same end plate 40 on the same side in a second direction.

[0108] The plurality of battery monomer rows 30 of the same battery monomer assembly 20 correspond to the same end plate 40 on the same side in the second direction, which means that the battery monomer assembly 20 includes two end plates 40, one of which is located on one side of the battery monomer assembly 20 in the second direction and opposite to each battery monomer row 30 in the battery monomer assembly 20 in the second direction, and the other end plate 40 is located on the other side of the battery monomer assembly 20 in the second direction and opposite to each battery monomer row 30 in the battery monomer assembly 20 in the second direction.

[0109] In the above technical solution, by sharing the end plate 40 by the plurality of battery monomer rows 30 in the same battery monomer assembly 20, the plurality of battery monomer rows 30 in the same battery monomer assembly 20 can be connected into a whole through the end plate 40, which can reduce the vibration offset of the adjacent two battery monomer rows 30 in the same battery monomer assembly 20 in the Z direction and the possible damage to the battery monomer 301. In addition, the number of end plates 40 can be reduced, the assembly process of the battery device 100 can be reduced, and the assembly efficiency of the battery device 100 can be improved.

[0110] In some embodiments, referring to Figure 3 and Figure 4 , the battery cell assembly 20 includes two rows of battery cell rows 30 arranged in the first direction, and the two rows of battery cell rows 30 in the same battery cell assembly 20 correspond to the same end plate 40 on the same side in the second direction.

[0111] In the above technical solution, by setting the battery cell assembly 20 to include two rows of battery cell rows 30 and the two rows of battery cell rows 30 in the battery cell assembly 20 share the end plate 40, the vibration offset of the adjacent two rows of battery cell rows 30 in the same battery cell assembly 20 in the Z direction is reduced, which may cause damage to the battery cell 301, and at the same time, each battery cell row 30 can obtain sufficient restraint force, avoiding vibration damage caused by insufficient restraint force of part of the battery cell row 30, and improving the overall structural strength and rigidity of the battery cell assembly 20.

[0112] In some embodiments, referring to Figure 3 and Figure 4 , the battery cell assembly 20 includes a pressing strip 50, the pressing strip 50 is arranged at the top of the battery cell row 30, and at least part of the pressing strip 50 is located on the upper surface of the battery cell 301, and the pressing strip 50 is connected with the end plate 40.

[0113] The pressing strip 50 is used to limit and constrain the battery cell 301, for example, the pressing strip 50 can be used to limit and constrain the vibration of the battery cell 301 in the Z direction, and for example, the pressing strip 50 can also be used to limit the swelling deformation of the battery cell 301.

[0114] At least part of the pressing strip 50 located on the upper surface of the battery cell 301 can include the following cases: for example, part of the pressing strip 50 is located on the upper surface of the battery cell 301, and the entire pressing strip 50 can also be located on the upper surface of the battery cell 301.

[0115] Wherein, the up-down direction can refer to the Z direction in the figure.

[0116] In the above technical solution, by arranging the pressing strip 50 at the top of the battery cell row 30 and connecting the pressing strip 50 with the end plate 40, the structural strength and anti-swelling force of the battery cell assembly 20 can be effectively improved.

[0117] In some embodiments, referring to Figure 3 and Figure 4 , both ends of the length direction of the pressing strip 50 are connected with the end plates 40 located on both sides of the battery cell row 30 in the second direction, respectively.

[0118] The two ends of the length direction of the pressing strip 50 are connected with the end plates 40 located on both sides of the battery monomer row 30 along the second direction respectively, that is, one end of the length direction of the pressing strip 50 is connected with the end plate 40 located on one side of the battery monomer row 30 along the second direction, and the other end of the length direction of the pressing strip 50 is connected with the end plate 40 located on the other side of the battery monomer row 30 along the second direction.

[0119] In the above technical solution, by connecting the two ends of the length direction of the pressing strip 50 with the end plates 40 located on both sides of the battery monomer row 30 respectively, the structural strength and the anti-expansion force of the battery monomer assembly 20 can be more effectively improved.

[0120] In some embodiments, the pressing strip 50 is detachably connected with the end plate 40.

[0121] In the above technical solution, by detachably connecting the pressing strip 50 with the end plate 40, the replacement and maintenance of the end plate 40 are facilitated.

[0122] In some embodiments, referring to Figure 3 and Figure 4 , the pressing strip 50 is connected with the end plate 40 through a fastener 54. For example, the fastener 54 can be a screw or a bolt.

[0123] In the above technical solution, by connecting the end of the pressing strip 50 with the end plate 40 through the fastener 54, the connection between the pressing strip 50 and the end plate 40 is more reliable and stable.

[0124] In some embodiments, referring to Figure 3 and Figure 4 , the pressing strip 50 is connected with each battery monomer 301 in the battery monomer row 30.

[0125] In the above technical solution, by connecting the pressing strip 50 with each battery monomer 301 in the battery monomer row 30, the pressing strip 50 can effectively limit each battery monomer 301 in the battery monomer row 30 in the Z direction, so that the single battery monomer row 30 is connected into a whole through the pressing strip 50, and the structural strength, the rigidity and the anti-expansion force of the single battery monomer row 30 are improved.

[0126] In some embodiments, referring to Figure 3 and Figure 4 , the pressing strip 50 extends along the second direction.

[0127] In the technical solution, the pressing strip 50 extends along the arrangement direction of the plurality of battery monomers 301 in the battery monomer row 30, which facilitates the connection between the pressing strip 50 and each battery monomer 301 in the battery monomer row 30, so that the pressing strip 50 can effectively limit each battery monomer 301 in the battery monomer row 30 in the Z direction, and the single battery monomer row 30 is connected into a whole by the pressing strip 50, thereby improving the structural strength, rigidity and anti-expansion force of the single battery monomer row 30.

[0128] In some embodiments, referring to Figure 3 and Figure 4 , the battery monomer row 30 is provided with the pressing strip 50 at at least one end in the first direction.

[0129] The battery monomer row 30 is provided with the pressing strip 50 at at least one end in the first direction, which can include the following cases: for example, the battery monomer row 30 is provided with the pressing strip 50 at one end in the first direction; for another example, the battery monomer row 30 is provided with the pressing strip 50 at both ends in the first direction, which can more evenly limit the two ends of the battery monomer row 30 in the first direction, more effectively limit the battery monomer row 30 in the Z direction, and better improve the structural strength, rigidity and anti-expansion force of the battery monomer row 30.

[0130] In the technical solution, the pressing strip 50 is arranged at at least one end of the battery monomer row 30 in the first direction, which can effectively limit the end of the battery monomer 301 in the first direction, and improve the structural strength, rigidity and anti-expansion force of the battery monomer row 30.

[0131] In some embodiments, referring to Figure 3 and Figure 4 , the two adjacent battery monomer rows 30 in the same battery monomer assembly 20 are provided with the pressing strip 50 at the end adjacent to each other.

[0132] In the technical solution, the pressing strip 50 is arranged at the end of the two adjacent battery monomer rows 30 in the same battery monomer assembly 20 adjacent to each other, which can better reduce the vibration offset of the two adjacent battery monomer rows 30 in the Z direction in the same battery monomer assembly 20, and prevent the damage of the battery monomer 301.

[0133] In some embodiments, referring to Figure 3 and Figure 4 , the two adjacent battery monomer rows 30 in the same battery monomer assembly 20 are pressed by the same pressing strip 50 at the end adjacent to each other.

[0134] In the technical solution, the two adjacent battery cell rows 30 in the same battery cell assembly 20 are pressed by the same pressing strip 50 at one end adjacent to each other, which can further effectively reduce the vibration deviation of the two adjacent battery cell rows 30 in the same battery cell assembly 20 in the Z direction, and can reduce the number of pressing strips 50, thereby reducing the installation process of the pressing strips 50, and improving the overall assembly efficiency of the battery cell assembly 20.

[0135] In some embodiments, referring to Figure 4 and Figures 5-7 , the top of the battery cell 301 is provided with a pole 31 and / or a pressure relief valve 32, and the pressing strip 50 is arranged staggered with the pole 31 and / or the pressure relief valve 32.

[0136] For example, the top of the battery cell 301 is provided with a pole 31, the pressing strip 50 is staggered with the pole 31, and the pressing strip 50 and the pole 31 can be arranged in the first direction.

[0137] For another example, the top of the battery cell 301 is provided with a pressure relief valve 32, the pressing strip 50 is staggered with the pressure relief valve 32, and the pressing strip 50 and the pressure relief valve 32 can be arranged in the first direction.

[0138] For another example, the top of the battery cell 301 is provided with a pole 31 and a pressure relief valve 32, the pressing strip 50 is staggered with the pole 31 and the pressure relief valve 32, and the pressing strip 50, the pole 31 and the pressure relief valve 32 can be arranged in the first direction. For example, each battery cell 301 is provided with a pressure relief valve 32 and two poles 31, one of the two poles 31 is a positive pole 31 and the other is a negative pole 31, the pressure relief valve 32 and the two poles 31 of each battery cell 301 are located at the top of the battery cell 301, and the pressure relief valve 32 and the two poles 31 are arranged in the first direction. In the first direction, the pressure relief valve 32 on the same battery cell 301 is located between the two poles 31, and the pressing strip 50 can be arranged on the side of the pole 31 away from the pressure relief valve 32 in the first direction.

[0139] The pole 31 is used as an electrode terminal of the battery cell 301, which facilitates the electrical connection of the battery cell 301 with other battery cells 301 and other components. The pressure relief valve 32 is used to balance the pressure in the battery cell 301, and timely discharge the high-temperature gas in the battery cell 301 when the pressure in the battery cell 301 is too high, thereby improving the safety of the battery cell 301.

[0140] In the technical solution, the pressing strip 50 is arranged staggered with the pole 31 and / or the pressure relief valve 32 arranged at the top of the battery cell 301, which can make full use of the remaining space at the top of the battery cell 301, and reduce or avoid the influence of the pressing strip 50 on the pole 31 or the pressure relief valve 32.

[0141] In some embodiments, the pressing strip 50 is connected with the battery monomer 301 through a first adhesive layer.

[0142] In the above technical solution, by bonding and fixing the pressing strip 50 on the battery monomer 301, the connection between the pressing strip 50 and the battery monomer 301 is fixed more conveniently and has higher connection stability.

[0143] In some embodiments, referring to Figures 4-6 , the shell 33 of the battery monomer 301 includes a shell body 331 and an insulating film 333 wrapped on the outer surface of the shell body 331, a portion of the insulating film 333 located at the top of the shell body 331 is formed with a window 334, and the portion of the shell body 331 opposite to the window 334 constitutes a fixing portion 332, and the pressing strip 50 is connected with the fixing portion 332.

[0144] In the above technical solution, the shell body 331 of the battery monomer 301 can be a metal piece, for example, the shell body 331 of the battery monomer 301 can be an aluminum shell or an aluminum alloy shell. The insulating film 333 can be a plastic insulating film 333.

[0145] A portion of the insulating film 333 located at the top of the shell body 331 is formed with a window 334, the window 334 penetrates through the insulating film 333 along the thickness direction of the insulating film 333, the window 334 exposes a portion of the top of the shell body 331 to the outside of the battery monomer 301, and the portion of the shell body 331 corresponding to the window 334 is exposed to the outside of the battery monomer 301 and constitutes the fixing portion 332, that is, the fixing portion 332 is exposed to the outside of the battery monomer 301 through the window 334 opened on the insulating film 333.

[0146] In the above technical solution, by opening the window 334 at the top of the battery monomer 301, a portion of the shell body 331 of the battery monomer 301 is exposed to facilitate the connection of the pressing strip 50 with the exposed portion of the shell body 331. Since the shell body 331 is a metal piece and has a relatively large thickness compared with the insulating film 333, the pressing strip 50 can be directly connected with the shell body 331 having high structural strength, and the connection strength between the pressing strip 50 and the battery monomer 301 can be improved.

[0147] In some embodiments, referring to Figures 5-7 , the pressing strip 50 includes a pressing strip body 51, the pressing strip body 51 includes a first metal framework 511 and a first insulating layer 512, and the first insulating layer 512 is wrapped on the outer surface of the first metal framework 511.

[0148] In the above technical solution, the first insulating layer 512 can be a plastic insulating layer, and the first insulating layer 512 can be integrally injection molded on the outer surface of the first metal framework 511.

[0149] In the technical solution, the pressing strip 50 is provided with the first metal framework 511 and the first insulating layer 512 covering the first metal framework 511, so that the overall structural strength of the pressing strip 50 is high, the pressing strip 50 can effectively limit the Z-direction vibration of the battery monomer 301, the overall structural strength and the anti-expansion ability of the battery monomer assembly 20 are improved, and the electrical contact between the pressing strip 50 and the battery monomer 301 is avoided, and the safety is improved.

[0150] In some embodiments, referring to Figure 7 The two ends of the first metal framework 511 are exposed outside the first insulating layer 512, and the two ends of the first metal framework 511 constitute fixed ends 513 connected with the end plates 40.

[0151] The two ends of the first metal framework 511 in the length direction are not covered by the first insulating layer 512, so that the two ends of the first metal framework 511 in the length direction are exposed outside the first insulating layer 512, and the first metal framework 511 has two fixed ends 513, one of which is located at one end of the first metal framework 511 in the length direction, and the other of which is located at the other end of the first metal framework 511 in the length direction. The two fixed ends 513 of the pressing strip 50 are respectively connected with the two end plates 40 located at the two ends of the battery monomer assembly 20 in the second direction.

[0152] For example, the first metal framework 511 can be a steel framework, and the first insulating layer 512 can be a plastic insulating layer.

[0153] In the technical solution, when the pressing strip 50 is provided with the first metal framework 511 and the first insulating layer 512 covering the first metal framework 511 to improve the overall structural strength and the anti-expansion ability of the pressing strip 50, the two ends of the first metal framework 511 of the pressing strip 50, which are not covered by the first insulating layer 512, are connected with the end plates 40, so that the connection strength and the connection stability of the pressing strip 50 and the end plates 40 are high.

[0154] In some embodiments, the first metal framework 511 is formed into a long strip-shaped metal strip. For example, the metal strip can be a steel strip.

[0155] In the technical solution, the first metal framework 511 is formed into a long strip-shaped metal strip, so that the overall structural strength of the pressing strip 50 is better, the binding force of the pressing strip 50 on the battery monomer row 30 is higher, and the overall structural strength, the rigidity and the anti-expansion ability of the battery monomer row 30 are effectively improved.

[0156] In some embodiments, referring to Figure 7The pressing strip 50 further comprises a pressing strip base 52 fixed to the top of the battery monomer 301, and the pressing strip body 51 is fixed to the pressing strip base 52.

[0157] The pressing strip base 52 can have insulation, so that the pressing strip 50 is better insulated from the battery monomer 301.

[0158] In the above technical solution, by making the pressing strip 50 include a pressing strip base 52 fixed to the top of the battery monomer 301, and making the pressing strip body 51 including a first metal framework 511 and a first insulating layer 512 covering the first metal framework 511 fixed in the pressing strip base 52, the installation and fixation of the pressing strip body 51 are facilitated, and the overall structural strength of the pressing strip 50 is also high.

[0159] In some embodiments, the pressing strip base 52 is a composite material piece. For example, the composite material piece can be a plastic matrix with a fiber reinforced structure distributed therein, and the fiber reinforced structure can be carbon fiber, glass fiber, etc.

[0160] In the above technical solution, by setting the pressing strip base 52 as a composite material piece, the pressing strip base 52 can have good structural strength and relatively light weight.

[0161] In some embodiments, the pressing strip base 52 is a pultruded composite material piece.

[0162] In the above technical solution, by setting the pressing strip 50 as a pultruded composite material piece, it is more convenient to form the long strip-shaped pressing strip 50 using the pultrusion composite process, and the forming efficiency and quality are both high, so that the pressing strip 50 is firm, light and durable.

[0163] In some embodiments, referring to Figure 3 The pressing strip body 51 and the pressing strip base 52 are connected through a second adhesive layer 53.

[0164] In the above technical solution, by bonding and fixing the pressing strip body 51 on the pressing strip base 52, the installation and fixation of the pressing strip body 51 are facilitated, and the connection stability is also high.

[0165] In some embodiments, referring to Figure 4 The pressing strip base 52 is formed with a receiving groove 521 extending along the length direction of the pressing strip base 52, and the pressing strip body 51 is accommodated in the receiving groove 521.

[0166] The receiving groove 521 extends along the length direction of the pressing strip base 52, which can be that the receiving groove 521 extends through the pressing strip base 52 along the length direction of the pressing strip base 52.

[0167] For example, when the pressing strip body 51 is connected to the pressing strip seat 52 through the second adhesive layer 53, the second adhesive layer 53 can be arranged on the bottom wall of the accommodating groove 521.

[0168] In the case where the pressing strip body 51 is accommodated in the accommodating groove 521 of the pressing strip seat 52, the pressing strip body 51 can not protrude from the upper surface of the pressing strip seat 52.

[0169] In the above technical solution, by arranging the accommodating groove 521 in the pressing strip seat 52 and installing the pressing strip body 51 into the accommodating groove 521, the pressing strip body 51 is conveniently limited when being installed on the pressing strip seat 52, and the size of the pressing strip 50 in the thickness or width direction of the pressing strip 50 can be reduced, the space occupied by the pressing strip 50 is reduced, and the overall energy density of the battery device 100 is improved.

[0170] In some embodiments, the accommodating groove 521 is formed on the upper surface of the pressing strip seat 52.

[0171] For example, when the pressing strip body 51 is connected to the pressing strip seat 52 through the second adhesive layer 53, the second adhesive layer 53 can be arranged on the bottom wall of the accommodating groove 521 or arranged on the bottom surface of the pressing strip body 51.

[0172] In the case where the pressing strip body 51 is accommodated in the accommodating groove 521 of the pressing strip seat 52, the pressing strip body 51 can not protrude from the upper surface of the pressing strip seat 52.

[0173] In the above technical solution, by arranging the accommodating groove 521 on the upper surface of the pressing strip seat 52, the pressing strip body 51 is conveniently installed downward into the accommodating groove of the pressing strip seat 52, and the space occupied by the pressing strip 50 in the Z direction can be reduced, thereby reducing the space occupied by the battery device 100 in the Z direction.

[0174] In some embodiments, referring to Figure 3 and Figure 4 , the battery cell assembly 20 further comprises a binding belt 60, and the binding belt 60 is bound on the outer circumferential side of the same battery cell assembly 20.

[0175] In the above technical solution, by binding the binding belt 60 on the outer circumferential side of the same battery cell assembly 20, the overall structural strength, rigidity and anti-expansion capability of the battery cell assembly 20 can be further improved.

[0176] In some embodiments, referring to Figure 4 and Figure 4 , the binding belt 60 is a plurality of binding belts 60, and the plurality of binding belts 60 are arranged at intervals in the height direction of the same battery cell assembly 20.

[0177] In the technical solution, the plurality of binding belts 60 are arranged along the height direction of the same battery monomer assembly 20 and are bound to the outer circumferential side of the same battery monomer assembly 20, and the binding force of the plurality of binding belts 60 can better improve the overall structural strength, rigidity and anti-expansion capability of the battery monomer assembly 20.

[0178] In some embodiments, the binding belt 60 comprises a second metal framework and a second insulating layer, and the second insulating layer is wrapped on the outer surface of the second metal framework.

[0179] In some embodiments, the second metal framework can be a steel framework, and the second insulating layer can be a plastic insulating layer.

[0180] In the technical solution, the binding belt 60 is provided with the second metal framework and the second insulating layer wrapped on the second metal framework, so that the binding belt 60 has high structural strength, the binding force of the binding belt 60 is high, and the binding belt 60 is insulated from the battery monomer 301, thereby improving safety.

[0181] In some embodiments, the second metal framework is formed as a long strip-shaped metal belt. For example, the second metal framework can be a steel belt.

[0182] In the technical solution, the second metal framework is formed as a long strip-shaped metal belt, so that the overall structural strength of the binding belt 60 is better, the binding force is higher, and the overall structural strength, rigidity and anti-expansion capability of the battery monomer assembly 20 can be effectively improved.

[0183] In some embodiments, referring to Figure 3 , the size of the battery monomer assembly 20 in the first direction is smaller than the size of the battery monomer assembly 20 in the second direction.

[0184] In the technical solution, the size of the battery monomer assembly 20 in the longitudinal direction of the vehicle 1000 is smaller than the size in the transverse direction of the vehicle 1000, so that the size of the battery monomer assembly 20 in the longitudinal direction of the vehicle 1000 is relatively reasonable, the overall structural strength of the battery monomer assembly 20 is high, and the constraint force on the battery monomer row 30 located in the middle of the battery monomer assembly 20 in the length direction of the vehicle 1000 is low, thereby avoiding affecting the overall structural strength and rigidity of the battery monomer assembly 20.

[0185] In some embodiments, referring to Figure 4 , the size of the battery monomer 301 in the up-down direction is smaller than the size of the battery monomer 301 in the first direction.

[0186] In the above technical solution, by making the size of the battery monomer 301 in the up-down direction smaller than the size of the battery monomer 301 in the longitudinal direction of the vehicle 1000, the battery monomer 301 can occupy less space in the Z direction of the vehicle 1000, so that the overall battery device 100 can occupy less space in the Z direction, which is beneficial to the layout of other components in the vehicle; and when the battery device 100 is installed at the bottom of the vehicle 1000, due to the smaller space occupied by the battery device 100 in the Z direction, the bottom surface height position of the battery device 100 will not be too low to cause easy scratch damage, and during the driving of the vehicle 1000, the risk of scratch damage of the battery device 100 can be reduced.

[0187] In some embodiments, referring to Figure 8 and Figure 8 The number of battery monomers 301 in each battery monomer row 30 is less than or equal to twenty.

[0188] In the above technical solution, by making the number of battery monomers 301 in each battery monomer row 30 less than or equal to twenty, the overall structural strength and rigidity of the battery monomer row 30 can be avoided due to the excessive number of battery monomer rows 30 in a single battery monomer row 30, the arrangement of the number of battery monomers 301 in the above battery monomer row 30 is beneficial to improve the structural strength, rigidity and anti-expansion force of the battery monomer row 30, and the structural strength and rigidity of the end plate 40 matched with the battery monomer row 30 can be reduced, the expansion force of the battery monomer row 30 on the end plate 40 can be reduced, and the service life of the end plate 40 can be prolonged.

[0189] In some embodiments, at least part of the end plate 40 is made of metal material.

[0190] At least part of the end plate 40 is made of metal material, which can include the following cases: for example, part of the end plate 40 is made of metal material, another part of the end plate 40 can be made of plastic material, for example, the plastic material can be wrapped outside the metal material; for example, the entire end plate 40 is made of metal material.

[0191] For example, at least part of the end plate 40 is made of steel material or aluminum alloy material.

[0192] In the above technical solution, by making at least part of the end plate 40 made of metal material, the end plate 40 can have higher structural strength and rigidity, so that the end plate 40 can have better binding force on the battery monomer row 30, and better inhibit the expansion deformation of the corresponding battery monomer row 30.

[0193] In some embodiments, referring to Figure 8The hollow cavity 41 is arranged in the end plate 40, and the reinforcing rib 44 is arranged in the hollow cavity 41.

[0194] In the technical solution, the hollow cavity 41 is arranged in the end plate 40, and the reinforcing rib 44 is arranged in the hollow cavity 41, so that the end plate 40 has good structural strength and rigidity while the weight of the end plate 40 is reduced, and the end plate 40 has good inhibiting capacity for the expansion of the battery monomer row 30.

[0195] In some embodiments, referring to Figure 8 The hollow cavity 41 has the first side wall 42 and the second side wall 43 arranged opposite in the second direction, and the reinforcing rib 44 is connected between the first side wall 42 and the second side wall 43.

[0196] In the technical solution, the reinforcing rib 44 is connected to the two side walls of the hollow cavity 41 in the thickness direction of the battery monomer 301, so that when the battery monomer row 30 expands and deforms, the expansion force is transmitted to the end plate 40, and the expansion force of the battery monomer 301 is transmitted to different parts of the end plate 40 through the reinforcing rib 44, which is beneficial to dispersing the expansion force and improving the anti-expansion performance of the end plate 40.

[0197] In some embodiments, referring to Figure 8 The hollow cavity 41 of the single end plate 40 is provided with a plurality of reinforcing ribs 44, the plurality of reinforcing ribs 44 are arranged in the up-down direction, the second side wall 43 is located on the side of the first side wall 42 away from the battery monomer row 30, and the spacing between at least some adjacent reinforcing ribs 44 gradually increases in the direction from the first side wall 42 to the second side wall 43.

[0198] The spacing between at least some adjacent reinforcing ribs 44 gradually increases in the direction from the first side wall 42 to the second side wall 43, which can include the following cases: for example, the spacing between some adjacent reinforcing ribs 44 gradually increases; for another example, the spacing between any adjacent reinforcing ribs 44 gradually increases.

[0199] For example, the hollow cavity 41 of the single end plate 40 is provided with two reinforcing ribs 44, the two reinforcing ribs 44 are arranged in the up-down direction, and the spacing between the two reinforcing ribs 44 gradually increases in the direction from the first side wall 42 to the second side wall 43, for example, the two reinforcing ribs 44 of the hollow cavity 41 can be arranged in a "V" shape.

[0200] In the technical solution, the reinforcing ribs 44 are arranged in the up-down direction, and the reinforcing ribs 44 are arranged in a diverging manner in the thickness direction of the battery monomer 301 and away from the battery monomer row 30. When the battery monomer row 30 is deformed and expands, the expansion force is transmitted to the end plate 40. The expansion force of the battery monomer 301 is dispersed by the reinforcing ribs 44 arranged in a diverging manner, which is beneficial to improve the anti-expansion performance of the end plate 40.

[0201] In some embodiments, referring to Figure 2 The hollow cavity 41 extends in the first direction, and the reinforcing rib 44 extends in the first direction.

[0202] For example, the hollow cavity 41 formed in the end plate 40 can extend through the end plate 40 in the first direction.

[0203] For example, the reinforcing rib 44 can have the same extension size in the first direction as the hollow cavity 41.

[0204] In the technical solution, the hollow cavity 41 is arranged in the longitudinal direction of the vehicle 1000, and the reinforcing rib 44 extends in the longitudinal direction of the vehicle 1000. The structure of the end plate 40 is strong, and the weight of the end plate 40 is reduced.

[0205] In some embodiments, referring to Figure 1 In the up-down direction, the hollow cavity 41 is located in the middle of the end plate 40.

[0206] In the technical solution, in the up-down direction, the hollow cavity 41 is located in the middle of the end plate 40. The structure of the upper and lower ends of the end plate 40 is strong, and the connection strength between the end plate 40 and the box body 10 is high.

[0207] In some embodiments, referring to Figure 1 The box body 10 includes a bottom plate 11, and the bottom plate 11 is provided with a mounting beam 12. The mounting beam 12 is arranged at opposite ends of the bottom plate 11 in the second direction, and the mounting beam 12 extends in the first direction. The end plate 40 is connected with the mounting beam 12.

[0208] For example, the end plate 40 located at one end of the battery monomer assembly 20 in the second direction is connected and fixed with the mounting beam 12 located at the same end of the bottom plate 11 in the second direction. The end plate 40 located at the other end of the battery monomer assembly 20 in the second direction is connected and fixed with the mounting beam 12 located at the same end of the bottom plate 11 in the second direction.

[0209] In the technical scheme, the mounting beam 12 is arranged on the bottom plate 11 of the box body 10, the end plate 40 is connected with the mounting beam 12, the mounting of the end plate 40 is facilitated, and the mounting beam 12 can improve the connection strength between the end plate 40 and the bottom plate 11.

[0210] In some embodiments, referring to Figure 9 , the ratio of the size of the box body 10 in the first direction to the size of the box body 10 in the second direction is greater than 2, and the second direction intersects the first direction.

[0211] In the technical scheme, the size of the box body 10 of the battery device 100 in the longitudinal direction of the vehicle 1000 is significantly greater than the size of the box body 10 in the transverse direction of the vehicle 1000, the longitudinal space of the vehicle 1000 can be fully utilized, and the capacity of the battery device 100 is improved.

[0212] In some embodiments, referring to Figures 1-4 , the ratio of the size of the box body 10 in the up-down direction to the size of the box body 10 in the second direction is less than 0.3.

[0213] In the technical scheme, the size of the box body 10 in the up-down direction is small, the battery device 100 is flat, the capacity of the battery device 100 is large, the space of the battery device 100 in the Z direction is small, the height of the bottom surface of the battery device 100 is not too low, the risk of damage of the battery device 100 is reduced, and the layout of other components in the vehicle 1000 is facilitated.

[0214] In the second aspect, the utility model provides a kind of vehicle 1000, comprising: the battery device 100 of the second aspect embodiment of the utility model.

[0215] Referring to Figures 1-4 , the vehicle 1000 includes a vehicle body 200, and the battery device 100 can be installed at the bottom of the vehicle body 200.

[0216] In the technical scheme, the battery device 100 is arranged, the longitudinal and transverse space of the vehicle 1000 can be more fully utilized, the arrangement of the plurality of battery monomers 301 is more compact, the capacity of the battery device 100 is improved, the size of the battery monomer 301 and the end plate 40 is more flexible, and the driving range of the vehicle 1000 is improved.

[0217] The following refers to​ A battery device 100 according to some embodiments of the present application is described.

[0218] With reference to ​ In this embodiment, the battery device 100 comprises a box 10 and a plurality of battery cell assemblies 20, the plurality of battery cell assemblies 20 are accommodated in the box 10 and arranged along a first direction. Each battery cell assembly 20 comprises two end plates 40, two rows of battery cell rows 30, a plurality of pressing strips 50 and two binding belts 60, the two rows of battery cell rows 30 of each battery cell assembly 20 are arranged along the first direction, each battery cell row 30 comprises a plurality of battery cells 301 arranged along a second direction, the thickness direction of the battery cell 301 is consistent with the second direction.

[0219] The box 10 comprises a bottom plate 11 and a top cover 13, the top cover 13 is arranged on the upper side of the bottom plate 11 and the top cover 13 is connected with the bottom plate 11, the top cover 13 and the bottom plate 11 are detachably connected, the bottom plate 11 and the top cover 13 jointly define a space for accommodating the battery cell assembly 20. The bottom plate 11 is provided with a mounting beam 12, the mounting beam 12 is arranged on the opposite sides of the battery cell assembly 20 along the second direction, and the end plate 40 of each battery cell assembly 20 is mounted on the mounting beam 12.

[0220] The two end plates 40 of each battery cell assembly 20 are arranged on the opposite sides of the battery cell row 30 along the first direction, and the two rows of battery cell rows 30 of the same battery cell assembly 20 correspond to the same end plate 40 on the same side in the second direction. Each battery cell assembly 20 comprises three pressing strips 50 arranged along the first direction, each pressing strip 50 extends along the first direction, and the two ends of each pressing strip 50 are connected with the two end plates 40 respectively. Among them, two pressing strips 50 in the same battery cell assembly 20 are arranged at the ends away from each other of the two rows of battery cell rows 30, and the other pressing strip 50 is arranged at the end close to each other of the two rows of battery cell rows 30, the end close to each other of the adjacent two rows of battery cell rows 30 in the same battery cell assembly 20 is pressed by the same pressing strip 50, and the width of the pressing strip 50 pressed by the adjacent two rows of battery cell rows 30 in the same battery cell assembly 20 is greater than the width of the pressing strip 50 pressed at the ends away from each other of the two rows of battery cell rows 30 in the same battery cell assembly 20.

[0221] The two binding belts 60 in the same battery cell assembly 20 are arranged in the height direction of the battery cell assembly 20 and are bound on the outer circumferential side of the battery cell assembly 20.

[0222] The size of the battery cell 301 in the up-down direction is smaller than the size of the battery cell 301 in the first direction, and the number of the battery cell rows 30 in each column can be 15 to 20. The ratio of the size of the case 10 in the first direction to the size of the case 10 in the second direction is greater than 2, and the ratio of the size of the case 10 in the up-down direction to the size of the case 10 in the second direction is less than 0.3, and the entire battery device 100 is in a rectangular flat shape as a whole.

[0223] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0224] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery device, characterized by, The battery device is arranged on the bottom of a vehicle, and comprises: a box; a plurality of battery cell assemblies arranged in the box and in a first direction, each of the battery cell assemblies comprising an end plate and at least one row of battery cell rows arranged in a second direction, each of the battery cell rows comprising a plurality of battery cells arranged in the second direction, the end plate being located on opposite sides of the battery cell assembly in the second direction, the thickness direction of the battery cell being consistent with the second direction, the first direction being consistent with the longitudinal direction of the vehicle, and the second direction being consistent with the transverse direction of the vehicle.

2. The battery device according to claim 1, characterized by The battery cell assembly comprises a plurality of rows of battery cell rows arranged in the first direction, and the plurality of rows of battery cell rows of the same battery cell assembly correspond to the same end plate on the same side in the second direction.

3. The battery device of claim 2, wherein, The battery cell assembly comprises two rows of battery cell rows arranged in the first direction, and the two rows of battery cell rows of the same battery cell assembly correspond to the same end plate on the same side in the second direction.

4. The battery device of claim 2, wherein The battery cell assembly comprises a pressing strip arranged on the top of the battery cell row, and at least part of the pressing strip is located on the upper surface of the battery cell, and the pressing strip is connected with the end plate.

5. The battery device of claim 4, wherein, Both ends of the length direction of the pressing strip are respectively connected with the end plates located on both sides of the battery cell row in the second direction.

6. The battery device of claim 4, wherein The pressing strip and the end plate are detachably connected.

7. The battery device of claim 4, wherein The pressing strip and the end plate are connected by a fastener.

8. The battery device of claim 4, wherein, At least one end of the battery cell row in the first direction is provided with the pressing strip.

9. The battery device of claim 4, wherein, The pressing strip is arranged at one end of each of the two adjacent rows of battery cell rows in the same battery cell assembly.

10. The battery device of claim 9, wherein, The pressing strip is arranged at one end of each of the two adjacent rows of battery cell rows in the same battery cell assembly.

11. The battery device of claim 4, wherein, The top of the battery cell is provided with a pole and / or a pressure relief valve, and the pressing strip is arranged staggered with the pole and / or the pressure relief valve.

12. The battery device of claim 4, wherein, The pressing strip and the battery cell are connected by a first adhesive layer.

13. The battery device of claim 4, wherein, The shell of the battery cell comprises a shell body and an insulating film wrapped on the outer surface of the shell body, a part of the insulating film located on the top of the shell body is formed with a window, and the part of the shell body opposite to the window constitutes a fixing part, and the pressing strip is connected with the fixing part.

14. The battery device of claim 4, wherein, The pressing strip comprises a pressing strip main body, and the pressing strip main body comprises a first metal framework and a first insulating layer wrapped on the outer surface of the first metal framework.

15. The battery device of claim 14, wherein, Both ends of the first metal framework are exposed outside the first insulating layer and constitute fixing ends, and the fixing ends are connected with the end plate.

16. The battery device of claim 14, wherein, The pressing strip further comprises a pressing strip seat fixed on the top of the battery cell, and the pressing strip main body is fixed on the pressing strip seat.

17. The battery device of claim 16, wherein, The pressing strip seat is a composite material piece.

18. The battery device of claim 17, wherein, The pressing strip seat is a pultruded composite material piece.

19. The battery device of claim 16, wherein, The pressing strip main body and the pressing strip seat are connected by a second adhesive layer.

20. The battery device of claim 16, wherein, The pressing strip seat is formed with an accommodating groove extending in the length direction of the pressing strip seat, and the pressing strip main body is accommodated in the accommodating groove.

21. The battery device of claim 20, wherein, The accommodating groove is formed in an upper surface of the bead seat.

22. The battery device of any one of claims 1-21, wherein, The battery cell assembly further includes: A binding tape is bound to an outer circumferential side of the same battery cell assembly.

23. The battery device of claim 22, wherein, The binding tapes are a plurality of binding tapes, and the plurality of binding tapes are arranged at intervals in a height direction of the same battery cell assembly.

24. The battery device of claim 22, wherein, The binding tape includes a second metal skeleton and a second insulating layer, and the second insulating layer is coated on an outer surface of the second metal skeleton.

25. The battery device of claim 24, wherein, The second metal skeleton is formed as a long strip-shaped metal tape.

26. The battery device of any one of claims 1-21, wherein, A ratio of a size of the case in the up-down direction to a size of the case in the second direction is less than 0.

3.

27. A vehicle characterized by A battery device including any one of claims 1-26.

Images