Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, and relates to the technical field of batteries, the battery device is used for improving the overall reliability of the battery device, the battery device comprises a box body, a plurality of battery monomer assemblies and at least one connecting piece, and the plurality of battery monomer assemblies are accommodated in the box body; each battery monomer assembly comprises at least one end plate and a plurality of battery monomers stacked along a first direction, the plurality of battery monomers are positioned on one side of the end plate along the first direction, and the plurality of battery monomer assemblies comprise a first battery monomer assembly and a second battery monomer assembly which are arranged side by side along a second direction. The connecting piece is connected to the end plate of the first battery monomer assembly and the end plate of the second battery monomer assembly, the connecting piece is connected to the box body, and at least part of the connecting piece forms a hollow structure; wherein the first direction intersects with the second direction. The battery device is used for storing or providing electric energy.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and an electric equipment. BACKGROUND

[0002] New energy batteries are more and more widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also more and more widely used in the field of energy storage and the like.

[0003] With the increasing application fields of battery devices, the reliability of the battery devices as a whole is more and more important. Among them, the stability of the battery monomer assembly arranged inside the battery device is an important aspect to improve the overall reliability of the battery device. CONTENT OF THE UTILITY MODEL

[0004] To solve the above technical problems, the present application provides a battery device and an electric equipment, which are used to improve the overall reliability of the battery device.

[0005] The present application is implemented through the following technical solutions.

[0006] The first aspect of the present application provides a battery device, which comprises a box body, a plurality of battery monomer assemblies and at least one connecting piece. The plurality of battery monomer assemblies are accommodated in the box body. Each battery monomer assembly comprises at least one end plate and a plurality of battery monomers stacked in a first direction. The plurality of battery monomers are located on one side of the end plate in the first direction. The plurality of battery monomer assemblies comprise a first battery monomer assembly and a second battery monomer assembly arranged side by side in a second direction. The connecting piece is connected to the end plate of the first battery monomer assembly and the end plate of the second battery monomer assembly, and the connecting piece is connected to the box body. At least part of the connecting piece is constituted as a hollow structure. The first direction intersects the second direction.

[0007] In the technical solution of the embodiment of the present application, the plurality of battery monomer assemblies are accommodated in the box body. The battery monomer assembly can be used to store or provide electric energy, and the box body can provide physical protection for the battery monomer assembly.

[0008] Since the connecting piece is connected to the end plate of the first battery monomer assembly and the end plate of the second battery monomer assembly, not only is the connection of the connecting piece and the first battery monomer assembly and the second battery monomer assembly facilitated, and damage to the battery monomer by the connecting piece avoided, but the connecting piece can improve the integrity of both the first battery monomer assembly and the second battery monomer assembly. Since the connecting piece is connected to the box, the integrity of the first battery monomer assembly, the second battery monomer assembly, and the box is improved. Thus, in the case of vibration and impact working conditions of the battery device, the consistency of the overall vibration frequency of the first battery monomer assembly, the second battery monomer assembly, and the box can be ensured, the relative stability of the first battery monomer assembly and the second battery monomer assembly in the box can be ensured, the probability of damage to the first battery monomer assembly and the second battery monomer assembly can be reduced, and the overall reliability of the battery device can be improved.

[0009] In addition, since at least part of the connecting piece constitutes a hollow structure, structural strength, structural rigidity, and lightweight can be taken into account. In the case of expansion of the first battery monomer assembly and the second battery monomer assembly, the connecting piece and the end plate can cooperate to resist the expansion of the battery monomer, and the arrangement of the connecting piece can reduce the risk of deformation of the end plate and improve the restraining effect on the expansion of the first battery monomer assembly and the second battery monomer assembly. The relative stability of the first battery monomer assembly and the second battery monomer assembly in the box can be further improved, and the overall reliability of the battery device can be further improved.

[0010] In some embodiments of the present application, the connecting piece includes a first connecting portion, a second connecting portion, and a third connecting portion connected together, the first connecting portion is connected to the end plate of the first battery monomer assembly, the second connecting portion is connected to the end plate of the second battery monomer assembly, and the third connecting portion is connected to the box, and the third connecting portion constitutes a hollow structure.

[0011] In this way, the connecting piece includes the first connecting portion, the second connecting portion, and the third connecting portion, the first connecting portion connects the end plate of the first battery monomer assembly, the second connecting portion connects the end plate of the second battery monomer assembly, and the third connecting portion connects the box, thereby achieving the connection of the box, the first battery monomer assembly, and the second battery monomer assembly, improving the integrity of the box, the first battery monomer assembly, and the second battery monomer assembly. In addition, the third connecting portion constitutes a hollow structure to more effectively share and transmit the expansion force of the first battery monomer assembly and the second battery monomer assembly, thereby improving the overall reliability of the battery device.

[0012] In some embodiments of the present application, the first battery monomer assembly comprises a first end plate, the second battery monomer assembly comprises a second end plate; the connecting piece comprises a first connecting piece; along the first direction, the first end plate and the second end plate are located on the same side in the respective battery monomer assembly, the first connecting part of the first connecting piece connects the first end plate, and the second connecting part of the first connecting piece connects the second end plate.

[0013] In this way, the first battery monomer assembly has a first end plate, and the second battery monomer assembly has a second end plate. Since the first end plate and the second end plate are located on the same side, it is more convenient to connect the first end plate and the second end plate by using the first connecting piece, thereby improving the convenience of connection.

[0014] In some embodiments of the present application, each battery monomer assembly comprises two end plates, and the two end plates are arranged at intervals along the first direction, and a plurality of battery monomers are located between the two end plates. The first battery monomer assembly comprises a first end plate and a third end plate, the second battery monomer assembly comprises a second end plate and a fourth end plate, along the first direction, the first end plate and the second end plate are located on the same side in the respective battery monomer assembly, and the third end plate and the fourth end plate are located on the same side in the respective battery monomer assembly, the number of connecting pieces is plural, and the plurality of connecting pieces comprise a first connecting piece and a second connecting piece, the first connecting piece connects the first end plate and the second end plate, and the second connecting piece connects the third end plate and the fourth end plate.

[0015] In this way, the battery monomer assembly comprises two end plates, the first end plate and the second end plate are connected by using the first connecting piece, and the third end plate and the fourth end plate are connected by using the second connecting piece, so as to connect the end plates at both ends of the battery monomer assembly, thereby improving the connection reliability and the integrity of the first battery monomer assembly and the second battery monomer assembly. In addition, since the two connecting pieces can share and transmit the expansion force of the battery monomer assembly, they can resist the expansion of the battery monomers together with the two end plates, and can also reduce the risk of deformation of the end plates.

[0016] In some embodiments of the present application, along the second direction, the projection of the first end plate and the projection of the second end plate do not overlap, and the first end plate and the battery monomers in the second battery monomer assembly have an overlapping part; the third connecting part of the first connecting piece extends along the first direction, and at least one of the first connecting part and the second connecting part extends from the third connecting part along the second direction.

[0017] In this way, according to actual requirements, the first end plate is recessed relative to the second end plate in the first direction, so that the third connecting portion of the first connecting piece also extends in the first direction, thereby matching the position deviation of the first end plate and the second end plate in the first direction, facilitating the position setting of the first connecting portion and the second connecting portion on the first connecting piece, facilitating the connection of the first connecting portion of the first connecting piece and the first end plate, facilitating the connection of the second connecting portion of the first connecting piece and the second end plate, and the third connecting portion is a hollow structure and extends in the first direction, which can effectively resist the expansion force of the battery monomer assembly in the first direction.

[0018] In some embodiments of the present application, the first connecting portion extends from the third connecting portion in the first direction, and the second connecting portion extends from the third connecting portion in the second direction.

[0019] In this way, the first connecting piece, the first end plate and the second end plate can be arranged more compactly, especially in the case of the first end plate being recessed relative to the second end plate, the space formed by the recess can be utilized without additional design of the mounting space of the first connecting piece.

[0020] In some embodiments of the present application, the projection of the third connecting portion of the first connecting piece and the projection of the first end plate have an overlapping portion when projected onto the same projection plane in the first direction. The projection of the third connecting portion of the first connecting piece and the projection of the second end plate have an overlapping portion when projected onto the same projection plane in the second direction.

[0021] In this way, the first connecting piece can be arranged using the space formed by the recess of the first end plate relative to the second end plate, and the first connecting portion connects the first end plate, and the third connecting portion can abut the first end plate in the first direction, so that the hollow third connecting portion can effectively resist the expansion force of the first battery monomer assembly.

[0022] In some embodiments of the present application, the third end plate is flush with the fourth end plate when viewed in the second direction; at least one of the first connecting portion and the second connecting portion of the second connecting piece extends from the third connecting portion in the second direction.

[0023] In this way, the third end plate and the fourth end plate arranged flush can be connected by the second connecting piece, thereby further improving the connection stability and integration of the first battery monomer assembly and the second battery monomer assembly.

[0024] In some embodiments of the present application, the third connecting portion of the second connecting piece is located between the third end plate and the fourth end plate in the second direction.

[0025] In this way, the third connecting portion of the second connecting piece can be located between the third end plate and the fourth end plate in the second direction, thereby achieving the setting of the third connecting portion of the second connecting piece, so that the space of the battery device in the first direction can be saved.

[0026] In some embodiments of the application, the third end plate is flush with the fourth end plate as viewed in the second direction; at least one of the first connecting portion and the second connecting portion of the second connecting member protrudes from the third connecting portion in the first direction.

[0027] In this way, the third end plate and the fourth end plate arranged flush can be connected by the second connecting member, thereby further improving the connection stability and integrity of the first battery monomer assembly and the second battery monomer assembly.

[0028] In some embodiments of the application, the projection of the third connecting portion of the second connecting member overlaps with the projection of the third end plate and the projection of the fourth end plate as projected in the first direction to the same projection plane.

[0029] In this way, the third connecting portion of the second connecting member can be arranged at one end of the third end plate and the fourth end plate in the first direction, thereby saving space of the battery device in the second direction.

[0030] In some embodiments of the application, the box body includes a bottom plate, the bottom plate carries the battery monomer assembly in a third direction; the first connecting portion of the first connecting member is connected to the end of the first end plate away from the bottom plate in the third direction; and / or, the second connecting portion of the first connecting member is connected to the end of the second end plate away from the bottom plate in the third direction; wherein the first direction, the second direction and the third direction are mutually intersected.

[0031] In this way, each end plate and each connecting member can be mounted and connected from the opening side of the box body when the cover plate of the box body is not closed, thereby facilitating operation.

[0032] In some embodiments of the application, the box body includes a bottom plate and a beam member, the bottom plate carries the battery monomer assembly in a third direction, and the third connecting portion of the first connecting member is connected to the beam member; wherein the first direction, the second direction and the third direction are mutually intersected.

[0033] In this way, the third connecting portion of the first connecting member can be connected by the beam member in the box body, thereby facilitating the connection of the third connecting portion of the first connecting member and the box body, and also being conducive to improving the connection strength of the first connecting member, thereby effectively resisting the expansion force of the battery monomers.

[0034] In some embodiments of the application, the box body includes a bottom plate and a beam member, the bottom plate carries the battery monomer assembly in a third direction, and the first end plate has an outward extension portion, the outward extension portion is lapped on the side of the beam member away from the bottom plate; wherein the first direction, the second direction and the third direction are mutually intersected.

[0035] In this way, the connection between the first end plate and the box can be achieved by the connection between the flange on the first end plate and the beam member on the bottom plate, so as to improve the convenience of the connection and ensure the stability of the connection between the first battery monomer assembly and the box. Since the flange is overlapped on the side of the beam member away from the bottom plate, the flange can be placed on the beam member by moving the first end plate downward along the third direction during actual installation. In this way, the installation is convenient, and the flange and the beam member can also play a positioning role, thereby improving the accuracy of the installation.

[0036] In some embodiments of the present application, the number of battery monomers in the first battery monomer assembly is less than the number of battery monomers in the second battery monomer assembly along the first direction.

[0037] In this way, the number of battery monomers in the first battery monomer assembly can be reduced, so that the first end plate is recessed in the first direction relative to the second end plate. In this way, the position of the first end plate and the second end plate can be set, and the storage capacity of the battery device can also be adjusted as needed.

[0038] The second aspect of the present application provides a power utilization device comprising the battery device of any of the above embodiments for providing electric energy.

[0039] In the technical solutions of the embodiments of the present application, since the battery device of any of the above embodiments is included, the same beneficial effects can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0040] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not intended to limit the scope of the present application. Moreover, the same reference numbers in all the drawings represent the same or similar elements. In the drawings:

[0041] Figure 1 A structural schematic diagram of a power utilization device provided for some embodiments of the present application;

[0042] Figure 2 An exploded schematic diagram of a battery device provided for some embodiments of the present application;

[0043] Figure 3 A top view schematic diagram of a battery device provided for some embodiments of the present application;

[0044] Figure 4 A structural schematic diagram of a first connecting member provided for some embodiments of the present application;

[0045] Figure 5 An assembly schematic diagram of an end plate and a first connecting member provided for some embodiments of the present application;

[0046] Figure 6 is Figure 5 a partial enlarged view of the middle A;

[0047] Figure 7 a first top view schematic diagram of the battery cell assembly, the first connecting member, and the second connecting member provided for some embodiments of the present application;

[0048] Figure 8 is Figure 7 a partial enlarged view of the middle B;

[0049] Figure 9 a second top view schematic diagram of the battery cell assembly, the first connecting member, and the second connecting member provided for some embodiments of the present application;

[0050] Figure 10 is Figure 9 a partial enlarged view of the middle C;

[0051] Figure 11 an exploded schematic diagram of the end plate and the first connecting member provided for some embodiments of the present application;

[0052] Figure 12 is Figure 11 a partial enlarged view of the middle D;

[0053] Figure 13 is Figure 6 a partial sectional view of the C direction at the sectioning surface b;

[0054] Figure 14 is Figure 6 a partial sectional view of the D direction at the sectioning surface c.

[0055] Explanation of Reference Signs

[0056] 1000 - vehicle; 100 - battery device; 110 - case; 111 - first case portion; 1111 - bottom plate; 1112 - beam member; 1113 - expanded beam; 112 - second case portion; 120 - battery cell assembly; 121 - battery cell; 122 - end plate; 122A - first end plate; 1221 - outer spread portion; 122B - second end plate; 122C - third end plate; 122D - fourth end plate; 120A - first battery cell assembly; 120B - second battery cell assembly; 130 - connecting member; 131 - first connecting portion; 132 - second connecting portion; 133 - third connecting portion; a - hollow structure; 130A - first connecting member; 130B - second connecting member; 140 - first fastener; 150 - second fastener; 160 - third fastener; 200 - controller; 300 - motor; X - first direction; Y - second direction; Z - third direction. DETAILED DESCRIPTION

[0057] The embodiments of the present application will be described in detail with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot be used to limit the protection scope of the present application.

[0058] Unless otherwise defined, 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 present application; the terms "comprising" and "having," and any variations thereof, as used herein are intended to cover a non-exclusive inclusion.

[0059] In the description of the embodiments of the present application, the technical terms "first", "second", "third" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0060] 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 appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0061] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are "or" relationship.

[0062] In the description of the embodiments of the present application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and is not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed, operated or used in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0063] In the description of the embodiments of the present application, unless explicitly defined and limited otherwise, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0064] In the description of the embodiments of the present application, unless explicitly defined and limited otherwise, the technical term "contacting" should be understood in a broad sense, which can be direct contact or contact through an intermediate medium layer, and can be contact between two contacting objects without interaction force, or contact between two contacting objects with interaction force.

[0065] In the following, the present application will be described in detail.

[0066] With the popularization and popularization of the concept of green development, new energy batteries are more and more widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used, in addition, battery devices are also more and more widely used in the field of energy storage and the like.

[0067] In the existing battery system, the battery device includes a box body and a plurality of battery monomer assemblies, the battery monomer assemblies are accommodated in the box body, the battery monomer assemblies can store or provide electric energy, and the box body provides physical protection for the battery monomer assemblies. For the improvement of the reliability of the battery device, the stability of the battery monomer assemblies arranged inside the box body is an important influencing aspect, therefore, how to improve the stability of the battery monomer assemblies accommodated in the box body is an important research direction.

[0068] In the related art, sheet metal sheets are used to connect adjacent battery monomer assemblies, so as to increase the stability of the battery monomer assemblies arranged in the box body, but the structural strength of the sheet metal sheet is limited and therefore easy to fail.

[0069] Based on this, the present application provides a battery device, which includes a box body, a plurality of battery monomer assemblies and at least one connecting piece, the plurality of battery monomer assemblies are accommodated in the box body, and the plurality of battery monomer assemblies include adjacent first and second battery monomer assemblies. The connecting piece is connected to the first and second battery monomer assemblies, and the connecting piece is connected to the box body, and at least part of the connecting piece is constituted as a hollow structure.

[0070] Through the above arrangement, the connecting piece includes three parts of the first connecting part, the second connecting part and the third connecting part, the first battery monomer assembly is connected by the first connecting part, the second battery monomer assembly is connected by the second connecting part, and the box body is connected by the third connecting part, so as to realize the connection of the box body, the first battery monomer assembly and the second battery monomer assembly, improve the integrity of the box body, the first battery monomer assembly and the second battery monomer assembly, and the third connecting part is hollow, so as to absorb the expansion energy of the relative expansion of the first battery monomer assembly and the second battery monomer assembly, so as to improve the reliability of the whole battery device.

[0071] In addition, since at least part of the connecting piece is hollow, the structural strength is relatively high, and it is less likely to fail, and when the first battery monomer assembly and the second battery monomer assembly expand relatively, the hollow structure can absorb the expansion energy, so that the connecting piece has a certain constraint effect on the expansion of the first battery monomer assembly and the second battery monomer assembly, so that the connecting reliability of the connecting piece is higher, so that the relative stability of the first battery monomer assembly and the second battery monomer assembly arranged in the box body can be further ensured, thereby further improving the reliability of the whole battery device.

[0072] On this basis, the application further provides a power consumption device, which comprises the above-mentioned battery device for providing electric energy. The power consumption device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, a ship, a spacecraft, etc. The electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric plane toys, etc. The spacecraft can include airplanes, rockets, space shuttles and spacecraft, etc.

[0073] In the following embodiments, for the convenience of description, the power consumption device of an embodiment of the application is taken as a vehicle for example.

[0074] Figure 1 A structural schematic diagram of a vehicle 1000 is provided for some embodiments of the application. The vehicle 1000 can be a fuel car, a gas car or a new energy car, and the new energy car can be a pure electric car, a hybrid car or a range extended car, etc. As shown in the figure, Figure 1 The vehicle 1000 is provided with a battery device 100 inside, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle 1000 during starting, navigation and driving.

[0075] In some embodiments of the present application, the battery apparatus 100 can not only serve as the power source for operating the vehicle 1000, but also serve as the driving power source for the vehicle 1000, replacing or partially replacing the fuel or natural gas to provide driving power for the vehicle 1000.

[0076] Figure 2 An exploded view of the battery apparatus 100 is provided in some embodiments of the present application. The battery apparatus 100 referred to in the embodiments of the present application includes a plurality of battery cell assemblies 120 for providing voltage and capacity. The battery cell assembly 120 can include a plurality of battery cells 121 connected in series, in parallel, or in a mixed connection through a busbar component.

[0077] In some embodiments, the battery cell assembly 120 is generally formed by arranging a plurality of battery cells 121. As an example, the battery cell assembly 120 can be a battery module formed by arranging and fixing a plurality of battery cells 121 into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 121 with a cable tie.

[0078] In some embodiments, as shown in Figure 2 The battery apparatus 100 can be a battery pack including a box 110 and one or more battery cell assemblies 120 received in the cavity.

[0079] As an example, the battery cell assembly 120 can be a battery module, and the battery cell assembly 120 can be received in the cavity by fixing the battery module in the cavity.

[0080] As an example, the battery cell assembly 120 can also be received in the cavity by directly fixing a plurality of battery cells 121 in the cavity.

[0081] As an example, as shown in Figure 2 The box 110 can include a first box portion 111 and a second box portion 112. The first box portion 111 and the second box portion 112 are fastened to form a closed space, i.e., a cavity, inside the box 110 to receive the battery cell assembly 120. Here, closed means covered or closed, which can be sealed or unsealed. The first box portion 111 can be a top cover or a bottom plate.

[0082] In the embodiments of the present application, the battery monomer 121 can be a secondary battery, which refers to a battery monomer that can be activated by charging after discharging.

[0083] The battery monomer 121 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., and the present application is not limited thereto.

[0084] In addition, the battery monomer 121 can be a cylindrical battery monomer, a prismatic battery monomer, a soft-pack battery monomer, or a battery monomer of other shapes, and the prismatic battery monomer includes a square cell, a blade cell, a multi-prismatic battery monomer, such as a hexagonal prismatic battery monomer, etc., and the present application is not particularly limited.

[0085] In the following, with reference to Figures 2 to 12 The embodiments of the present application are described in detail.

[0086] In some embodiments of the present application, as shown in Figure 3 , Figure 4 The present application provides a battery device 100, which includes a box body 110, a plurality of battery monomer assemblies 120, and at least one connecting piece 130, the plurality of battery monomer assemblies 120 are accommodated in the box body 110; each battery monomer assembly 120 includes at least one end plate 122 and a plurality of battery monomers 121 stacked in a first direction X, the plurality of battery monomers 121 are located on one side of the end plate 122 along the first direction X, the plurality of battery monomer assemblies 120 include a first battery monomer assembly 120A and a second battery monomer assembly 120B arranged side by side along a second direction Y. The connecting piece 130 is connected to the end plate 122 of the first battery monomer assembly 120A and the end plate 122 of the second battery monomer assembly 120B, and the connecting piece 130 is connected to the box body 110, at least part of the connecting piece 130 is hollow structure a; wherein the first direction X intersects the second direction Y.

[0087] It can be understood that the first direction X and the second direction Y are different and intersecting directions, for example, the first direction X is the thickness direction of the battery monomer 121, and also the stacking direction of the plurality of battery monomers 121, and the second direction Y is the width direction of the battery monomer 121, that is, the first direction X and the second direction Y are arranged vertically. Of course, the present application does not make too many limitations on the angle formed by the intersection of the first direction X and the second direction Y, for example, the first direction X and the second direction Y can intersect at 75°, 80°, 85°, or 90°, etc. For ease of understanding, the present application is introduced by taking the first direction X and the second direction Y as perpendicular.

[0088] In some examples, the number of the battery cell assemblies 120 can be two, three, four, five or six, etc. For example, the number of the battery cell assemblies 120 is six, and there are two sub-spaces inside the box 110 along the first direction X, each of the sub-spaces contains three battery cell assemblies 120, and the three battery cell assemblies 120 are arranged side by side along the second direction Y, wherein the first direction X is the stacking direction of the plurality of battery cells 121 in the battery cell assembly 120, the second direction Y is the width direction of the battery cell 121, and the first direction X is perpendicular to the second direction Y. In this way, the six battery cell assemblies 120 can be laid on the bottom plate 1111 of the box 110, so as to control the thickness of the battery device 100 and control the space in the thickness direction of the battery device 100.

[0089] In some examples, the connecting piece 130 is arranged inside the box 110, and the end plates 122 of any two adjacent battery cell assemblies 120 are connected to each other by the connecting piece 130 and connected to the box 110, so as to ensure the integrity of all the battery cell assemblies 120 and the box 110 and improve the stability of the arrangement of all the battery cell assemblies 120.

[0090] In some examples, any two adjacent battery cell assemblies 120 can be connected by any suitable connecting piece 130, for example, any two adjacent battery cell assemblies 120 can be connected by two connecting pieces 130.

[0091] In some examples, the connecting piece 130 and the first battery cell assembly 120A can be connected by adhesion, screws or bolts, etc. fasteners or clamping connection. The connecting piece 130 and the second battery cell assembly 120B can be connected by adhesion, screws or bolts, etc. fasteners or clamping connection. The connecting piece 130 and the box 110 can be connected by adhesion, screws or bolts, etc. fasteners or clamping connection.

[0092] In addition, it can be understood that at least part of the connecting piece 130 constitutes a hollow structure a, which means that a channel, a closed cavity, a hollow structure, etc. space structure is formed inside the connecting piece 130, for example, the connecting piece 130 can be a hollow profile structure. The number of the hollow structure a can be selected and arranged as needed, for example, it can be one or more, and in the case of multiple hollow structures a, the number of the hollow structures a can be two, three, four, five or six.

[0093] In some examples, the material of the connecting piece 130 can be metal, for example, it can be aluminum, steel or copper, etc. The material of the connecting piece 130 can also be plastic.

[0094] Exemplarily, the material of the connecting piece 130 is aluminum. The aluminum connecting piece 130 not only has high structural strength, but also has light weight. Therefore, the weight of the battery device 100 can be controlled on the basis of ensuring the connection strength of the first battery monomer assembly 120A and the second battery monomer assembly 120B.

[0095] In some examples, the connecting piece 130 can be directly connected with the bottom plate 1111 or the side plate of the box body 110, or the connecting piece 130 can be connected with the beam member 1112 on the box body 110. The specific connection can be selected according to the position of the connecting piece 130 in the box body 110.

[0096] In some examples, in addition to being connected to the box body 110 through the connecting piece 130, the end plate 122 of the first battery monomer assembly 120A and the end plate 122 of the second battery monomer assembly 120B can also establish a direct connection relationship with the box body 110, respectively. In this way, the stability of the first battery monomer assembly 120A and the second battery monomer assembly 120B in the box body 110 can be further improved.

[0097] Through the above arrangement, the plurality of battery monomer assemblies 120 are accommodated in the box body 110. The battery monomer assemblies 120 can be used for storing or providing electric energy, and the box body 110 can provide physical protection for the battery monomer assemblies 120.

[0098] Since the connecting piece 130 is connected to the end plate 122 of the first battery monomer assembly 120A and the end plate 122 of the second battery monomer assembly 120B, the connecting piece 130 not only facilitates the connection of the first battery monomer assembly 120A and the second battery monomer assembly 120B, but also avoids damaging the battery monomer 121. In addition, the connecting piece 130 can improve the integrity of the first battery monomer assembly 120A and the second battery monomer assembly 120B. Since the connecting piece 130 is connected with the box body 110, the integrity of the first battery monomer assembly 120A, the second battery monomer assembly 120B and the box body 110 is improved. Therefore, the consistency of the overall vibration frequency of the first battery monomer assembly 120A, the second battery monomer assembly 120B and the box body 110 can be ensured when the battery device 100 is in a vibration impact working condition. The relative stability of the first battery monomer assembly 120A and the second battery monomer assembly 120B in the box body 110 can be ensured, the probability of damage of the first battery monomer assembly 120A and the second battery monomer assembly 120B can be reduced, and the reliability of the battery device 100 as a whole can be improved.

[0099] In addition, since at least part of the connecting piece 130 constitutes the hollow structure a, the structural strength, the structural rigidity and the light weight can be considered, when the first battery monomer assembly 120A and the second battery monomer assembly 120B expand, the connecting piece 130 and the end plate 122 can cooperate to resist the expansion of the battery monomer 121, and the arrangement of the connecting piece 130 can reduce the risk of deformation of the end plate 122, improve the constraint effect on the expansion of the first battery monomer assembly 120A and the second battery monomer assembly 120B, reduce the risk of deformation of other components, and thus the relative stability of the first battery monomer assembly 120A and the second battery monomer assembly 120B arranged in the box body 110 can be further improved, thereby further improving the reliability of the battery device 100 as a whole.

[0100] The structure of the connecting piece 130 itself can be various, as long as the connecting piece 130 has the hollow structure a, and the structure of the connecting piece 130 will be introduced below.

[0101] In some embodiments of the present application, as shown in Figure 4 The connecting piece 130 includes a first connecting part 131, a second connecting part 132 and a third connecting part 133 connected together, the first connecting part 131 is connected with the end plate 122 of the first battery monomer assembly 120A, the second connecting part 132 is connected with the end plate 122 of the second battery monomer assembly 120B, and the third connecting part 133 is connected to the box body 110, and the third connecting part 133 constitutes the hollow structure a.

[0102] That is, the connecting piece 130 includes the first connecting part 131, the second connecting part 132 and the third connecting part 133, and the three parts correspond to the first battery monomer assembly 120A, the second battery monomer assembly 120B and the box body 110 respectively, so as to realize the connection of the three.

[0103] The structure of the first connecting part 131 and the second connecting part 132 is not limited, for example, the first connecting part 131 and the second connecting part 132 can both be plate-shaped structures, and one side of the plate-shaped structure can be matched and connected with the surface of the battery monomer assembly 120. Alternatively, the first connecting part 131 and the second connecting part 132 can both be bracket structures.

[0104] In addition, for the third connecting part 133, the hollow structure a is formed inside the third connecting part 133, when the hollow structure a is a channel, the third connecting part 133 itself can also extend along the extension direction of the channel, so that the channel type hollow structure a can be arranged conveniently. When the hollow structure a is a closed inner cavity, the shape of the third connecting part 133 is not limited.

[0105] Through the above arrangement, the connecting piece 130 comprises three parts of the first connecting part 131, the second connecting part 132 and the third connecting part 133, the first connecting part 131 is used to connect the end plate 122 of the first battery monomer assembly 120A, the second connecting part 132 is used to connect the end plate 122 of the second battery monomer assembly 120B, and the third connecting part 133 is used to connect the box body 110, so as to realize the connection of the box body 110, the first battery monomer assembly 120A and the second battery monomer assembly 120B, improve the integrity of the box body 110, the first battery monomer assembly 120A and the second battery monomer assembly 120B, and make the third connecting part 133 form a hollow structure a, so as to more effectively share and transmit the expansion energy of the relative expansion of the first battery monomer assembly 120A and the second battery monomer assembly 120B, so that the expansion force of the first battery monomer assembly 120A and the second battery monomer assembly 120B can be improved, and the reliability of the battery device 100 as a whole can be improved.

[0106] In addition, since the connecting piece 130 comprises a three-part structure, the structure of each part can be designed and processed separately according to the connection needs to match the connection, so that the connection convenience of the connecting piece 130 can be improved.

[0107] Of course, in other embodiments, the connecting piece 130 itself is a long strip-shaped profile structure, the profile structure has a channel extending along the length direction of the profile structure inside, the channel forms a hollow structure a, and the profile structure is connected with the first battery monomer assembly 120A, the second battery monomer assembly 120B and the box body 110, so that the connection of the first battery monomer assembly 120A, the second battery monomer assembly 120B and the box body 110 can also be realized.

[0108] In some embodiments of the present application, as shown in Figures 3-6 the first battery monomer assembly 120A comprises a first end plate 122A, the second battery monomer assembly 120B comprises a second end plate 122B, the connecting piece 130 comprises a first connecting piece 130A, along the first direction X, the first end plate 122A and the second end plate 122B are located on the same side in the respective battery monomer assembly 120, the first connecting part 131 of the first connecting piece 130A connects the first end plate 122A, and the second connecting part 132 of the first connecting piece 130A connects the second end plate 122B.

[0109] In addition, it can be understood that for each battery monomer assembly 120, the end plate 122 and the battery monomer 121 are connected, for example, the connection can be realized by bundling or the like, so that after the first end plate 122A and the second end plate 122B are connected by the first connecting piece 130A, the connection of the first battery monomer assembly 120A and the second battery monomer assembly 120B can be realized.

[0110] In some examples, the first connecting member 130A is arranged on the side where the first end plate 122A and the second end plate 122B are located in the first direction X. In this way, the connection of the first connecting member 130A with the first end plate 122A and the second end plate 122B can be facilitated, and the size of the battery device 100 in the second direction Y can be controlled by reasonably arranging the structure of the first connecting member 130A.

[0111] In some examples, the first end plate 122A can be directly connected to the box 110 by means of bolts or other fasteners, and the second end plate 122B can be directly connected to the box 110 by means of bolts or other fasteners. In this way, the stability of the first battery monomer assembly 120A and the second battery monomer assembly 120B arranged in the box 110 can be further improved.

[0112] Through the above arrangement, the first battery monomer assembly 120A has the first end plate 122A, the second battery monomer assembly 120B has the second end plate 122B, the first connecting member 130A is connected to the first end plate 122A by means of the first connecting portion 131, and the second connecting portion 132 of the first connecting member 130A is connected to the second end plate 122B. In this way, the connection of the first battery monomer assembly 120A and the second battery monomer assembly 120B is achieved. Since the first end plate 122A and the second end plate 122B are located on the same side, it is more convenient to connect the first end plate 122A and the second end plate 122B by means of the first connecting member 130A, so as to improve the convenience of connection.

[0113] When connecting the first battery monomer assembly 120A and the second battery monomer assembly 120B, only the first connecting member 130A can be used to achieve the connection, or, on the basis of arranging the first connecting member 130A, a second connecting member 130B is further arranged, and the first connecting member 130A and the second connecting member 130B are used to achieve the connection.

[0114] In some embodiments of the present application, as Figures 3-6As shown, each battery monomer assembly 120 includes two end plates 122, the two end plates 122 are spaced apart along the first direction X, and a plurality of battery monomers 121 are located between the two end plates 122. The first battery monomer assembly 120A includes a first end plate 122A and a third end plate 122C, and the second battery monomer assembly 120B includes a second end plate 122B and a fourth end plate 122D. Along the first direction X, the first end plate 122A and the second end plate 122B are located on the same side in the respective battery monomer assembly 120, and the third end plate 122C and the fourth end plate 122D are located on the same side in the respective battery monomer assembly 120. The plurality of connecting pieces 130 includes a first connecting piece 130A and a second connecting piece 130B, the first connecting piece 130A connects the first end plate 122A and the second end plate 122B, and the second connecting piece 130B connects the third end plate 122C and the fourth end plate 122D.

[0115] It can be understood that the first connecting piece 130A connecting the first end plate 122A and the second end plate 122B means that the first connecting portion 131 of the first connecting piece 130A connects the first end plate 122A, and the second connecting portion 132 of the first connecting piece 130A connects the second end plate 122B. The second connecting piece 130B connecting the third end plate 122C and the fourth end plate 122D means that the first connecting portion 131 of the second connecting piece 130B connects the third end plate 122C, and the second connecting portion 132 of the second connecting piece 130B connects the fourth end plate 122D.

[0116] Through the above arrangement, the battery monomer assembly 120 includes two end plates 122, the first end plate 122A and the second end plate 122B are connected by the first connecting piece 130A, and the third end plate 122C and the fourth end plate 122D are connected by the second connecting piece 130B, so that the end plates 122 at both ends of the battery monomer assembly 120 are connected, thereby further improving the connection reliability and integration of the first battery monomer assembly 120A and the second battery monomer assembly 120B. In addition, since the two connecting pieces 130 can share and transmit the expansion force of the battery monomer assembly 120, the expansion of the battery monomer 121 can be resisted together with the two end plates 122, and the risk of deformation of the end plate 122 can be reduced.

[0117] In some embodiments of the present application, as shown in Figure 6 As shown, along the second direction Y, the projection of the first end plate 122A does not overlap the projection of the second end plate 122B, and the first end plate 122A and the battery monomer 121 in the second battery monomer assembly 120B have an overlapping portion. The third connecting portion 133 of the first connecting piece 130A extends along the first direction X, and at least one of the first connecting portion 131 and the second connecting portion 132 extends from the third connecting portion 133 along the second direction Y.

[0118] It can be understood that the second direction Y projects to the same projection plane, the projection of the first end plate 122A does not overlap with the projection of the second end plate 122B, and the first end plate 122A and the battery cell 121 in the second battery cell assembly 120B have an overlapping part, which means that, as viewed along the second direction Y, the first end plate 122A and the second end plate 122B are not in the same plane, and the first end plate 122A is concave relative to the second end plate 122B.

[0119] In some examples, along the first direction X, the first end plate 122A and the expansion beam 1113 of the box body 110 are opposite to each other, the second end plate 122B and the expansion beam 1113 of the box body 110 are opposite to each other, the distance between the first end plate 122A and the expansion beam 1113 is greater than the distance between the second end plate 122B and the expansion beam 1113, the space between the first end plate 122A and the collision beam accommodates the connecting piece 130, and then the first connecting part 131 of the connecting piece 130 is connected with the first end plate 122A, and the second connecting part 132 of the connecting piece 130 is connected with the second end plate 122B, so that the utilization rate of the space between the first end plate 122A and the expansion beam 1113 can be improved.

[0120] In addition, for the first connecting piece 130A, at least one of the first connecting part 131 and the second connecting part 132 extends from the third connecting part 133 along the second direction Y, which can include three cases. The first case is that the first connecting part 131 extends from the third connecting part 133 along the second direction Y. The second case is that the second connecting part 132 extends from the third connecting part 133 along the second direction Y. The third case is that the first connecting part 131 and the second connecting part 132 both extend from the third connecting part 133 along the second direction Y.

[0121] In some examples, for the first connecting piece 130A, the third connecting part 133 extends along the first direction X, and the third connecting part 133 has a channel structure extending along the first direction X, which forms a hollow structure a, and the number of the channel structure can be one or more. In the case of multiple channel structures, the multiple channel structures are arranged at intervals along a direction perpendicular to the first direction X. For example, the number of the channel structure is two, and the two channel structures are arranged at intervals along a plane perpendicular to the first direction X and the second direction Y, that is, the third connecting part 133 is in the shape of a "day" in a cross section perpendicular to the first direction X.

[0122] Exemplarily, for the first connecting piece 130A, the first connecting part 131 extends from the third connecting part 133 along the second direction Y and extends to the first end plate 122A and is connected with the first end plate 122A, and the second connecting part 132 extends from the third connecting part 133 along the second direction Y and extends to the second end plate 122B and is connected with the second end plate 122B, in this case, in order to facilitate the connection between the first connecting part 131 and the first end plate 122A, along the second direction Y, a gap can be provided between the first end plate 122A and the second end plate 122B, so that the third connecting part 133 is arranged in the gap, thereby facilitating the alignment of the first connecting part 131 and the first end plate 122A along the second direction Y, and facilitating the connection between the first connecting part 131 and the first end plate 122A.

[0123] Through the above arrangement, according to the actual requirement, the first end plate 122A is recessed relative to the second end plate 122B along the first direction X, so that the third connecting part 133 of the first connecting piece 130A also extends along the first direction X, which can match the positional deviation of the first end plate 122A and the second end plate 122B along the first direction X, so as to facilitate the positional arrangement of the first connecting part 131 and the second connecting part 132 of the first connecting piece 130A, facilitate the connection between the first connecting part 131 of the first connecting piece 130A and the first end plate 122A, and facilitate the connection between the second connecting part 132 of the first connecting piece 130A and the second end plate 122B, and the third connecting part 133 is a hollow structure and extends along the first direction X, which can effectively resist the expansion force of the battery monomer assembly 120 along the first direction X.

[0124] Along the first direction X, the recessing of the first end plate 122A relative to the second end plate 122B can be the recessing of the entire first battery monomer assembly 120A relative to the second battery monomer assembly 120B, or it can also be the shortening of the length of the first battery monomer assembly 120A along the first direction X.

[0125] In some embodiments of the present application, as shown in Figure 3 Along the first direction X, the number of battery monomers 121 in the first battery monomer assembly 120A is less than the number of battery monomers 121 in the second battery monomer assembly 120B.

[0126] That is, along the first direction X, the length of the first battery monomer assembly 120A is less than the length of the second battery monomer assembly 120B, so that by reasonably arranging the relative positions of the first battery monomer assembly 120A and the second battery monomer assembly 120B along the first direction X, the recessing of the first end plate 122A relative to the second end plate 122B along the first direction X can be realized.

[0127] The number of battery cells 121 in the first battery cell assembly 120A can be one, two, three, four, or five fewer than the number of battery cells 121 in the second battery cell assembly 120B. The specific number depends on the user's demand for the energy storage capacity of the battery device 100.

[0128] With the above settings, the number of battery cells 121 in the first battery cell assembly 120A can be reduced, thereby causing the first end plate 122A to be recessed relative to the second end plate 122B in the first direction X. This not only satisfies the positional requirements of the first end plate 122A and the second end plate 122B, but also allows for the adjustment of the number of battery cells 121 in the battery cell assembly 120A to regulate the energy storage capacity of the battery device 100, thereby meeting the user's energy storage capacity requirements of the battery device 100.

[0129] In some embodiments of this application, such as Figure 4 , Figure 6 As shown, the first connecting part 131 extends from the third connecting part 133 along the first direction X, and the second connecting part 132 extends from the third connecting part 133 along the second direction Y.

[0130] In some examples, the first connecting portion 131 extends from the third connecting portion 133 along the first direction X toward the first end plate 122A, and the second connecting portion 132 extends from the third connecting portion 133 along the second direction Y toward the second end plate 122B. This facilitates the connection between the first connecting portion 131 and the first end plate 122A, and the connection between the second connecting portion 132 and the second end plate 122B. Moreover, with this configuration, when viewed from a direction perpendicular to the plane where the first direction X and the second direction Y intersect (the thickness direction or height direction of the battery device 100), the first connecting member 130A is L-shaped.

[0131] With the above arrangement, the first connector 130A, the first end plate 122A, and the second end plate 122B can be arranged more compactly. In particular, when the first end plate 122A is recessed relative to the second end plate 122B, the space formed by the recess can be utilized, and there is no need to design additional installation space for the first connector 130A.

[0132] In some embodiments of this application, such as Figure 6 As shown, when projected onto the same projection plane along the first direction X, the projection of the third connecting portion 133 of the first connector 130A overlaps with the projection of the first end plate 122A. When projected onto the same projection plane along the second direction Y, the projection of the third connecting portion 133 of the first connector 130A overlaps with the projection of the second end plate 122B.

[0133] That is, the third connecting portion 133 of the first connecting member 130A has an overlapping portion with the first end plate 122A in the first direction X, and has an overlapping portion with the second end plate 122B in the second direction Y.

[0134] In some examples, for the first connecting member 130A, the first connecting portion 131 is connected to the portion where the third connecting portion 133 and the first end plate 122A overlap in the first direction X, and the second connecting portion 132 is connected to the portion where the third connecting portion 133 and the second end plate 122B overlap in the second direction Y, so that the first connecting portion 131 and the first end plate 122A can be connected in the first direction X, and the second connecting portion 132 and the second end plate 122B can be connected in the second direction Y.

[0135] Through the above arrangement, the first connecting member 130A can be arranged in the space formed by the first end plate 122A being recessed relative to the second end plate 122B, and the first connecting portion 131 is connected to the first end plate 122A, and the third connecting portion 133 can abut against the first end plate 122A in the first direction X, so that the hollow third connecting portion 133 can effectively resist the expansion force of the first battery monomer assembly 120A.

[0136] In some embodiments of the present application, as shown in Figure 7 , Figure 8 As viewed in the second direction Y, the third end plate 122C is flush with the fourth end plate 122D. At least one of the first connecting portion 131 and the second connecting portion 132 of the second connecting member 130B extends from the third connecting portion 133 in the second direction Y.

[0137] As viewed in the second direction Y, the third end plate 122C being flush with the fourth end plate 122D means that the third end plate 122C is flush with the fourth end plate 122D in the first direction X.

[0138] In addition, at least one of the first connecting portion 131 and the second connecting portion 132 of the second connecting member 130B extends from the third connecting portion 133 in the second direction Y includes three ways, the first way, the first connecting portion 131 of the second connecting member 130B extends from the third connecting portion 133 in the second direction Y. The second way, the second connecting portion 132 of the second connecting member 130B extends from the third connecting portion 133 in the second direction Y. The third way, the first connecting portion 131 and the second connecting portion 132 of the second connecting member 130B both extend in the second direction Y.

[0139] Through the above arrangement, the second connecting piece 130B can be used to connect the third end plate 122C and the fourth end plate 122D arranged in the same plane, and then the first connecting piece 130A can improve the connection stability on the side where the first end plate 122A and the second end plate 122B are located, and the second connecting piece 130B can improve the connection stability on the side where the third end plate 122C and the fourth end plate 122D are located, thereby further improving the connection stability and integrity of the first battery monomer assembly 120A and the second battery monomer assembly 120B.

[0140] In some embodiments of the present application, as shown in Figure 7 , Figure 8 In the second direction Y, the third connecting part 133 of the second connecting piece 130B is located between the third end plate 122C and the fourth end plate 122D.

[0141] That is, a space is arranged between the third end plate 122C and the fourth end plate 122D in the second direction Y, so that the third connecting part 133 of the second connecting piece 130B is arranged in the space, and then the first connecting part 131 of the second connecting piece 130B is connected with the third end plate 122C, and the second connecting part 132 of the second connecting piece 130B is connected with the fourth end plate 122D.

[0142] In some examples, for the second connecting piece 130B, in the second direction Y, the third connecting part 133 of the second connecting piece 130B is located between the third end plate 122C and the fourth end plate 122D, the third connecting part 133 extends in the first direction X, and the hollow structure a is a channel extending in the first direction X. Such an arrangement can control the size of the third connecting part 133 in the second direction Y, thereby controlling the space occupied by the third connecting part 133 in the second direction Y in the box body 110.

[0143] In some examples, for the second connecting piece 130B, in the first direction X, the projection of the third connecting part 133 of the second connecting piece 130B overlaps with the projection of the third end plate 122C and the projection of the fourth end plate 122D, and the third connecting part 133 extends in the second direction Y, and the hollow structure a is a channel extending in the second direction Y. Such an arrangement of the extending direction of the third connecting part 133 and the arrangement direction of the third end plate 122C and the fourth end plate 122D is consistent, and by reasonably arranging the positions of the first connecting part 131 and the second connecting part 132, the connection of the first connecting part 131 and the third end plate 122C can be facilitated, and the connection of the second connecting part 132 and the fourth end plate 122D can be facilitated.

[0144] Through the above arrangement, the third connecting portion 133 of the second connecting member 130B can be located between the third end plate 122C and the fourth end plate 122D in the second direction Y, so as to realize the arrangement of the third connecting portion 133 of the second connecting member 130B, and thus the space of the battery device 100 in the first direction X can be saved.

[0145] In some embodiments of the present application, as shown in Figure 9 , Figure 10 viewed in the second direction Y, the third end plate 122C is flush with the fourth end plate 122D. At least one of the first connecting portion 131 and the second connecting portion 132 of the second connecting member 130B extends from the third connecting portion 133 in the first direction X.

[0146] wherein, viewed in the second direction Y, the third end plate 122C is flush with the fourth end plate 122D means that, in the first direction X, the third end plate 122C is flush with the fourth end plate 122D.

[0147] In addition, at least one of the first connecting portion 131 and the second connecting portion 132 of the second connecting member 130B extends from the third connecting portion 133 in the first direction X includes three ways, the first, the first connecting portion 131 of the second connecting member 130B extends from the third connecting portion 133 in the first direction X. The second, the second connecting portion 132 of the second connecting member 130B extends from the third connecting portion 133 in the first direction X. The third, the first connecting portion 131 and the second connecting portion 132 of the second connecting member 130B both extend in the first direction X.

[0148] Through the above arrangement, the third connecting portion 133 of the second connecting member 130B can be located between the third end plate 122C and the fourth end plate 122D in the second direction Y, so as to realize the arrangement of the third connecting portion 133 of the second connecting member 130B, and thus the space of the battery device 100 in the first direction X can be saved.

[0149] In some embodiments of the present application, as shown in Figure 9 , Figure 10 viewed in the second direction Y, the third end plate 122C is flush with the fourth end plate 122D. At least one of the first connecting portion 131 and the second connecting portion 132 of the second connecting member 130B extends from the third connecting portion 133 in the first direction X.

[0150] That is, the second connecting member 130B is arranged at the side of the third end plate 122C and the fourth end plate 122D away from the respective battery monomers 121, and the first connecting portion 131 of the second connecting member 130B is connected to the third end plate 122C and the second connecting portion 132 of the second connecting member 130B is connected to the fourth end plate 122D.

[0151] In some examples, for the second connecting member 130B, the projection of the third connecting portion 133 of the second connecting member 130B overlaps with the projection of the third end plate 122C and the projection of the fourth end plate 122D when projected onto the same projection plane along the first direction X, and the third connecting portion 133 extends along the second direction Y, and the hollow structure a is a channel extending along the second direction Y. In this way, the extending direction of the third connecting portion 133 is arranged to be consistent with the arrangement direction of the third end plate 122C and the fourth end plate 122D, and by reasonably arranging the positions of the first connecting portion 131 and the second connecting portion 132, the connection of the first connecting portion 131 and the third end plate 122C can be facilitated, and the connection of the second connecting portion 132 and the fourth end plate 122D can be facilitated.

[0152] Through the above arrangement, along the first direction X, the third connecting portion 133 of the second connecting member 130B can be arranged at one end of the third end plate 122C and the fourth end plate 122D, so that the space of the battery device 100 in the second direction Y can be saved.

[0153] In some embodiments of the present application, as shown in Figures 11-14 The box body 110 includes a bottom plate 1111 that carries the battery monomer assembly 120 along the third direction Z. The first connecting portion 131 of the first connecting member 130A is connected to the end of the first end plate 122A away from the bottom plate 1111 along the third direction Z. And / or, the second connecting portion 132 of the first connecting member 130A is connected to the end of the second end plate 122B away from the bottom plate 1111 along the third direction Z; wherein the first direction X, the second direction Y and the third direction Z are two by two intersecting.

[0154] It can be understood that the third direction Z is a direction intersecting with the plane intersected by the first direction X and the second direction Y, for example, the third direction Z is perpendicular to the plane intersected by the first direction X and the second direction Y.

[0155] The first connecting part 131 of the first connecting member 130A is connected to the end of the first end plate 122A away from the bottom plate 1111 in the third direction Z, which means that the first connecting part 131 of the first connecting member 130A is overlapped on the end of the first end plate 122A away from the bottom plate 1111 in the third direction Z. The second connecting part 132 of the first connecting member 130A is connected to the end of the second end plate 122B away from the bottom plate 1111 in the third direction Z, which means that the second connecting part 132 of the first connecting member 130A is overlapped on the end of the second end plate 122B away from the bottom plate 1111 in the third direction Z.

[0156] In some examples, the first connecting part 131 of the first connecting member 130A is connected to the end of the first end plate 122A away from the bottom plate 1111 in the third direction Z by the second fastener 150, and the second connecting part 132 of the first connecting member 130A is connected to the end of the second end plate 122B away from the bottom plate 1111 in the third direction Z by the third fastener 160. The connection mode of the fastener has higher structural strength and is more reliable.

[0157] It can be understood that, in the case where the box body 110 includes the first box body 110 part and the second box body 110 part, the bottom plate 1111 belongs to a part of the first box body 110 part.

[0158] Through the above arrangement, for the first connecting member 130A, in the third direction Z, the first connecting part 131 and the first end plate 122A can be connected from the side of the first end plate 122A away from the bottom plate 1111, so that sufficient operation space can be provided during connection, and the connection of the first connecting part 131 and the first end plate 122A can be facilitated. And / or, in the third direction Z, the second connecting part 132 and the second end plate 122B can be connected from the side of the second end plate 122B away from the bottom plate 1111, so that sufficient operation space can be provided during connection, and the connection of the second connecting part 132 and the second end plate 122B can be facilitated.

[0159] In some embodiments of the present application, as shown in Figures 11-14 The box body 110 includes a bottom plate 1111 and a beam member 1112, the bottom plate 1111 bears the battery monomer assembly 120 in the third direction Z, and the third connecting part 133 of the first connecting member 130A is connected to the beam member 1112; wherein the first direction X, the second direction Y and the third direction Z intersect with each other.

[0160] It can be understood that the third direction Z is the direction in which the bottom plate 1111 bears the battery monomer assembly 120, and the third direction Z is perpendicular to the plane in which the first direction X and the second direction Y intersect.

[0161] The beam member 1112 and the bottom plate 1111 can be connected together by welding, gluing, clamping or fastener connection.

[0162] In some examples, the beam member 1112 is located in the gap between the first end plate 122A and the expansion beam 1113 along the first direction X, the beam member 1112 is lower than the first battery monomer assembly 120A along the third direction Z, and the third connecting portion 133 of the first connecting member 130A is carried on the side of the beam member 1112 away from the back plate and connected with the beam member 1112. In this way, the first connecting member 130A can be arranged in the gap between the first end plate 122A and the expansion beam 1113, thereby improving the utilization of space and avoiding interference between the first connecting member 130A and other components.

[0163] In some examples, as shown in FIG. 13, for the first connecting member 130A, the third connecting portion 133 extends along the first direction X, and a plurality of mounting holes arranged along the first direction X are formed on the third connecting portion 133. The mounting holes extend along the third direction Z, and the first fastener 140 passes through the mounting holes and extends into the beam member 1112 to connect the third connecting portion 133 and the beam member 1112, thereby improving the connection strength and reliability. Figures 11-14

[0164] In some examples, a gasket can be arranged between the third connecting portion 133 and the beam member 1112, and the first fastener 140 passes through the gasket. The gasket is arranged to avoid direct contact between the third connecting portion 133 and the beam member 1112, thereby reducing the relative wear between the third connecting portion 133 and the beam member 1112.

[0165] In addition, the first fastener 140 can be a bolt or a screw.

[0166] In some examples, the beam member 1112 is also hollow inside. Along the first direction X, the beam member 1112 abuts between the first end plate 122A and the expansion beam 1113. In this way, the hollow structure inside the beam member 1112 can also absorb the expansion force of the first battery monomer assembly 120A, thereby constraining the expansion deformation of the first end plate 122A of the first battery monomer assembly 120A.

[0167] In some examples, the first end plate 122A is connected with the beam member 1112, so that the first end plate 122A is connected with the box body 110 through the beam member 1112. Since the connection between the first end plate 122A and the beam member 1112 is more convenient, the convenience of connecting the first end plate 122A and the box body 110 can be improved.

[0168] ​Through the above arrangement, the third connecting portion 133 of the first connecting member 130A can be connected by the beam member 1112 in the box body 110, which can be arranged on the box body 110 at a suitable position as a separate component to match the connection of the third connecting portion 133 of the first connecting member 130A, so that the connection of the third connecting portion 133 of the first connecting member 130A and the box body 110 is facilitated, and the connection strength of the first connecting member 130A is improved, thereby effectively resisting the expansion force of the battery monomer 121.

[0169] In some embodiments of the present application, as shown in Figure 12 The box body 110 includes a bottom plate 1111 and a beam member 1112, the bottom plate 1111 bears the battery monomer assembly 120 along the third direction Z, the first end plate 122A has a flange portion 1221, and the flange portion 1221 is lapped on the side of the beam member 1112 away from the bottom plate 1111; wherein the first direction X, the second direction Y and the third direction Z intersect with each other.

[0170] The flange portion 1221 can be a plate-shaped, block-shaped or sheet-shaped structure.

[0171] In addition, the lapping of the flange portion 1221 on the beam member 1112 can be that the flange portion 1221 is placed on the surface of the side of the beam member 1112 away from the bottom plate 1111, and then the flange portion 1221 is connected on the beam member 1112 by using fasteners (such as screws, bolts) or clamping, etc., to realize lapping.

[0172] In some examples, the number of flange portions 1221 on the first end plate 122A can be one or more, wherein the number of flange portions 1221 can be two, three, four or five, etc. The plurality of flange portions 1221 are arranged at intervals along the second direction Y.

[0173] Through the above arrangement, the connection between the flange portion 1221 on the first end plate 122A and the beam member 1112 on the bottom plate 1111 can be used to realize the connection of the first end plate 122A and the box body 110, so as to improve the convenience of connection and ensure the stability of the connection of the first battery monomer assembly 120A and the box body 110. Since the flange portion 1221 is lapped on the side of the beam member 1112 away from the bottom plate 1111, during actual installation, the flange portion 1221 can be placed on the beam member 1112 by moving the first end plate 122A downward along the third direction Z, so that the installation is facilitated, and the flange portion 1221 and the beam member 1112 can also play a positioning role, thereby improving the accuracy of installation.

[0174] In some embodiments, the second end plate 122B also has a similar lap joint structure as the flared portion 1221, except that the lap joint structure is lapped on the expansion beam 1113.

[0175] In another aspect of the present application, the present application also provides a power consuming device comprising the battery device 100 of any of the above embodiments for providing electric energy. Since the power consuming device comprises the battery device 100, the effect of improving the stability of the battery cell assembly 120 in the battery device 100 and improving the reliability of the battery device 100 as a whole can also be achieved.

[0176] In the following, specific examples of some embodiments of the present application will be described with reference to the accompanying drawings.

[0177] The first battery monomer assembly 120A and the second battery monomer assembly 120B are placed in the second box 110 of the box 110, and the first battery monomer assembly 120A and the second battery monomer assembly 120B are carried on the bottom plate 1111, then the second end plate 122B of the second battery monomer assembly 120B is connected with the expansion beam 1113 of the box 110, the beam member 1112 is located between the first end plate 122A and the expansion beam 1113 of the box 110 in the first direction X, and then the first end plate 122A is connected with the expansion beam 1113. Then the first connecting piece 130A is arranged in the gap between the first end plate 122A and the expansion beam 1113, the third connecting part 133 of the first connecting piece 130A is carried on the side of the beam member 1112 away from the bottom plate 1111, the third connecting part 133 of the first connecting piece 130A extends in the first direction X and is connected with the beam member 1112, then the first connecting part 131 of the first connecting piece 130A extends out of the third connecting part 133 in the first direction X and is lapped on the end of the first end plate 122A away from the bottom plate 1111 in the third direction Z, and at the same time the second connecting part 132 of the first connecting piece 130A extends out of the third connecting part 133 in the second direction Y and is lapped on the end of the second end plate 122B away from the bottom plate 1111 in the third direction Z, so as to realize the connection of the first connecting piece 130A and the first end plate 122A, the second end plate 122B and the beam member 1112. Similarly, for the third end plate 122C and the fourth end plate 122D, the first connecting part 131 of the second connecting piece 130B is connected with the third end plate 122C, the second connecting part 132 of the second connecting piece 130B is connected with the fourth end plate 122D, and the third connecting part 133 of the second connecting piece 130B is connected with the box 110, so as to realize the connection of the second connecting piece 130B and the third end plate 122C, the fourth end plate 122D and the box 110. By arranging the first connecting piece 130A and the second connecting piece 130B, the integrity of the first battery monomer assembly 120A, the second battery monomer assembly 120B and the box 110 is improved, so as to improve the relative stability of the fixation of the three and the reliability of the battery device 100.

[0178] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings of the present application, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A battery device, characterized in that, include: Box; Multiple battery cell assemblies are housed within the casing; Each of the battery cell assemblies includes at least one end plate and a plurality of battery cells stacked along a first direction, the plurality of battery cells being located on one side of the end plate along the first direction, and the plurality of battery cell assemblies including a first battery cell assembly and a second battery cell assembly arranged side by side along a second direction. At least one connector is connected to the end plate of the first battery cell assembly and the end plate of the second battery cell assembly, and the connector is connected to the housing, and at least a portion of the connector is configured as a hollow structure. Wherein, the first direction intersects with the second direction.

2. The battery device according to claim 1, characterized in that, The connector includes a first connecting part, a second connecting part, and a third connecting part connected together. The first connecting part is connected to the end plate of the first battery cell assembly, the second connecting part is connected to the end plate of the second battery cell assembly, and the third connecting part is connected to the housing. The third connecting part is configured as a hollow structure.

3. The battery device according to claim 2, characterized in that, The first battery cell assembly includes a first end plate, and the second battery cell assembly includes a second end plate; the connector includes a first connector. Along the first direction, the first end plate and the second end plate are located on the same side in their respective battery cell assemblies, the first connecting portion of the first connector is connected to the first end plate, and the second connecting portion of the first connector is connected to the second end plate.

4. The battery device according to claim 3, characterized in that, Each of the battery cell assemblies includes two end plates, which are spaced apart along the first direction, and the plurality of battery cells are located between the two end plates; The first battery cell assembly includes a first end plate and a third end plate, and the second battery cell assembly includes a second end plate and a fourth end plate. Along the first direction, the first end plate and the second end plate are located on the same side in their respective battery cell assemblies, and the third end plate and the fourth end plate are located on the same side in their respective battery cell assemblies. The number of connectors is multiple, including a first connector and a second connector. The first connector connects the first end plate and the second end plate, and the second connector connects the third end plate and the fourth end plate.

5. The battery device according to claim 3 or 4, characterized in that, Projecting along the second direction onto the same projection plane, the projection of the first end plate does not overlap with the projection of the second end plate, and the first end plate has an overlapping portion with the battery cell in the second battery cell assembly. The third connecting portion of the first connector extends along the first direction, and at least one of the first connecting portion and the second connecting portion extends out from the third connecting portion along the second direction.

6. The battery device according to claim 5, characterized in that, The first connecting portion extends from the third connecting portion along the first direction, and the second connecting portion extends from the third connecting portion along the second direction.

7. The battery device according to claim 5, characterized in that, Projecting along the first direction onto the same projection plane, the projection of the third connecting portion of the first connector overlaps with the projection of the first end plate; Projecting along the second direction onto the same projection plane, the projection of the third connecting portion of the first connector overlaps with the projection of the second end plate.

8. The battery device according to claim 4, characterized in that, Viewed along the second direction, the third end plate is flush with the fourth end plate; At least one of the first connecting portion and the second connecting portion of the second connector extends from the third connecting portion along the second direction.

9. The battery device according to claim 8, characterized in that, Along the second direction, the third connecting portion of the second connector is located between the third end plate and the fourth end plate.

10. The battery device according to claim 4, characterized in that, Viewed along the second direction, the third end plate is flush with the fourth end plate; At least one of the first connecting portion and the second connecting portion of the second connector extends from the third connecting portion along the first direction.

11. The battery device according to claim 10, characterized in that, When projected onto the same projection plane along the first direction, the projection of the third connecting portion of the second connector overlaps with the projection of the third end plate and the projection of the fourth end plate.

12. The battery device according to claim 3 or 4, characterized in that, The housing includes a base plate, which supports the battery cell assembly along a third direction. The first connecting portion of the first connector is connected to the end of the first end plate that is away from the bottom plate along the third direction; and / or, the second connecting portion of the first connector is connected to the end of the second end plate that is away from the bottom plate along the third direction; The first direction, the second direction, and the third direction intersect each other.

13. The battery device according to claim 3 or 4, characterized in that, The housing includes a base plate and beam members. The base plate supports the battery cell assembly in a third direction. The third connecting part of the first connector is connected to the beam members. The first direction, the second direction, and the third direction intersect each other.

14. The battery device according to claim 3 or 4, characterized in that, The housing includes a base plate and beam members. The base plate supports the battery cell assembly in a third direction. The first end plate has an outward extension, which overlaps the side of the beam member opposite to the base plate. The first direction, the second direction, and the third direction intersect each other.

15. The battery device according to claim 5, characterized in that, Along the first direction, the number of battery cells in the first battery cell assembly is less than the number of battery cells in the second battery cell assembly.

16. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1-15 for providing electrical energy.

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