Battery device and electric equipment

Abstract

The utility model relates to the technical field of battery equipment, and discloses a battery device and electric equipment. The battery device comprises a box body which is provided with an assembly space and a bottom wall; the battery monomers are arranged in the assembly space to form at least one battery monomer assembly, the battery monomer assembly is fixedly arranged on the bottom wall, and each battery monomer is provided with an electrode terminal; the electrode terminals between two adjacent battery monomers are electrically connected through the connecting sheets; and the at least one first pressing piece is fixedly connected to one side, deviating from the battery monomers, of the connecting pieces, the extension direction of the first pressing piece is consistent with the extension direction of the battery monomer assembly, the at least two connecting pieces of the battery monomer assembly are fixedly connected with the first pressing piece, and the first pressing piece is insulated from the connecting pieces. By applying the technical scheme, the problem that a plurality of battery monomers including but not limited to a battery device are difficult to form an integral rigid structure, so that the connecting sheet is easy to loosen or fatigue fracture is solved.

Description

Technical Field

[0001] The present application belongs to the technical field of battery equipment, and in particular relates to a battery device and electrical equipment. Background Art

[0002] In related art, a battery device includes a housing and multiple battery cells. The multiple battery cells are arranged within the housing and connected in series, parallel, or mixed via connecting tabs. The bottom ends of the multiple battery cells are glued to the bottom wall of the housing. However, the top ends of the multiple battery cells are connected only by connecting tabs, resulting in a relatively loose top end, making it difficult for the multiple battery cells to form a rigid overall structure. When the battery device is subjected to vibration, each battery cell has a relatively independent vibration mode. Over time, this can lead to structural damage to the battery device, such as loosening or fatigue fracture of the connecting tabs. Utility Model Content

[0003] The purpose of the present application is to provide a battery device and an electrical device to solve the problem that it is difficult to form an overall rigid structure between multiple battery cells of a battery device including but not limited to the related art, resulting in the connection piece being easily loosened or fatigued and broken.

[0004] To achieve the above objectives, according to a first aspect of an embodiment of the present application, a battery device is provided, comprising:

[0005] The box body has an assembly space and a bottom wall;

[0006] A plurality of battery cells are arranged in the assembly space to form at least one battery cell assembly, the battery cell assembly is fixedly mounted on the bottom wall, and the battery cells have electrode terminals;

[0007] A plurality of connecting pieces, through which the electrode terminals of two adjacent battery cells are electrically connected;

[0008] At least one first pressing member is fixedly connected to the side of the connecting piece facing away from the battery cell. The extension direction of the first pressing member is consistent with the extension direction of the battery cell assembly. At least two connecting pieces of the battery cell assembly are fixedly connected to the first pressing member. The first pressing member and the connecting piece are insulated.

[0009] In the battery device of the present application, multiple battery cells are arranged within an assembly space to form at least one battery cell assembly. The bottom of the battery cell assembly is fixedly mounted on the upper bottom wall (i.e., each battery cell is fixed to the bottom wall in a positionally fixed manner). Furthermore, within the battery cell assembly, not only are the electrode terminals of two adjacent battery cells connected by a connecting piece, but a first pressure member is also fixedly connected to the side of the connecting piece facing away from the battery cells. Thus, the battery cell assembly is restrained within the assembly space by the bottom wall, the connecting piece, and the first pressure member, forming a rigid, integrated structure within the assembly space. When the battery device is subjected to vibration, due to the rigid, integrated structure of the battery cell assembly, the battery cells are restrained by the first pressure member, the connecting piece between adjacent battery cells, and the bottom wall, resulting in a uniform vibration mode for each battery cell. This reduces the impact of vibration on the connecting piece between the battery cells, improves the stability and reliability of the connecting piece between the battery cells, and enhances the overall vibration resistance of each battery cell in the battery device, thereby strengthening the overall vibration resistance of the battery device.

[0010] In some embodiments of the present application, multiple battery cells are arranged to form a plurality of parallel battery cell assemblies, and at least two connecting tabs of each battery cell assembly are fixedly connected to the first pressure member. Thus, the multiple battery cell assemblies are restrained within the assembly space by the cooperation of the bottom wall, the connecting tabs, and the first pressure member, forming a rigid overall structure within the assembly space.

[0011] In some embodiments of the present application, the housing further comprises a circumferential wall, the bottom wall and the circumferential wall enclosing an assembly space, and the first pressure member has two ends fixedly connected to the circumferential wall. In this manner, the circumferential wall of the housing provides connecting and supporting force to the first pressure member, thereby improving the stability and reliability of the first pressure member's restraint on each battery cell when the battery assembly is subject to vibration.

[0012] In some embodiments of the present application, the first pressing member is a plate-shaped member fixedly connected to the connecting pieces on all battery cells; or, the first pressing member is a plurality of strip-shaped members, and one battery cell assembly is provided with at least one first pressing member.

[0013] In some embodiments of the present application, the first pressing member and the connecting piece are fixed by adhesive bonding; and / or the first pressing member is an insulating member, and the first pressing member and the connecting piece are fixedly connected by fasteners.

[0014] In some embodiments of the present application, along the extending direction of the battery cell assembly, shoulders are provided on both sides of the battery cell; the battery device further includes a plurality of second pressing members, the extending direction of the second pressing members is perpendicular or parallel to the extending direction of the battery cell assembly, the second pressing members are fixedly connected to two opposite shoulders between adjacent two battery cells in adjacent two battery cell assemblies, and the second pressing members are insulated from the battery cells. On the basis that the battery cells are restricted by the first pressing members, the connection pieces between adjacent battery cells and the bottom wall, the battery cells are further restricted by the corresponding second pressing members, so that the overall rigid structure formed by the plurality of battery cell assemblies in the assembly space is further stabilized, and thus the vibration modes of the respective battery cells are further unified.

[0015] In some embodiments of the present application, both ends of the second pressing member are fixedly connected to the box body, further improving the limiting stability and reliability of the second pressing member on each battery cell.

[0016] In some embodiments of the present application, along the height direction of the battery cell, the height from the surface of the connection piece facing away from the battery cell to the top surface of the battery cell is greater than or equal to the height from the surface of the second pressing member facing away from the battery cell to the top surface of the battery cell. This avoids the situation of mutual interference between the first pressing member and the second pressing member along the height direction during the assembly process, so that the second pressing member and the first pressing member can be successfully assembled, and the assembly efficiency is improved.

[0017] In some embodiments of the present application, the second pressing member and the shoulder are fixedly bonded by glue; and / or, the second pressing member is an insulating component, and the second pressing member and the shoulder are fixedly connected by a fastener.

[0018] In some embodiments of the present application, the battery cell is a square battery cell or a cylindrical battery cell.

[0019] In some embodiments of the present application, the battery device further includes two third pressing members, the extending direction of the third pressing members is perpendicular or parallel to the extending direction of the battery cell assembly, and the two third pressing members are respectively fixedly connected to the shoulders of the battery cells in the battery cell assemblies at both ends along the arrangement direction of the plurality of battery cell assemblies. The third pressing members are insulated from the battery cells. When the battery device is affected by vibration, on the basis that the battery cells are restricted by the first pressing members, the second pressing members, the connection pieces between adjacent battery cells and the bottom wall, the battery cells are further restricted by the two third pressing members, so that the vibration modes of the respective battery cells are further unified, thereby improving the stability and reliability of the connection pieces between the battery cells.

[0020] In some embodiments of the present application, the third pressing member is fixedly bonded to the corresponding shoulder by glue; and / or, the third pressing member is an insulating member, and the third pressing member is fixedly connected to the corresponding shoulder by a fastener.

[0021] In some embodiments of the present application, both ends of the third pressing member are fixedly connected to the box body, further improving the limiting stability and reliability of the third pressing member on the plurality of battery cell assemblies.

[0022] In some embodiments of the present application, the battery device further includes at least one cross beam, both ends of the cross beam are respectively connected to the box body, the cross beam divides the assembly space into at least two spaces, and at least one of the first pressing member, the second pressing member and the third pressing member straddles the cross beam and is fixedly connected to the cross beam. The cross beam provides a connecting force and a supporting force to at least one of the first pressing member, the second pressing member and the third pressing member, so as to further improve the limiting stability and reliability of at least one of the first pressing member, the second pressing member and the third pressing member on the battery cell assemblies when the battery device is affected by vibration.

[0023] In some embodiments of the present application, the first pressing member and the second pressing member are integrally formed; and / or, the first pressing member and the third pressing member are integrally formed. The integrated first pressing member and second pressing member or the integrated first pressing member and third pressing member can better cooperate with each other to limit the plurality of battery cells to form an integral rigid structure, further improving the stability and reliability of the connection pieces between the battery cells.

[0024] In some embodiments of the present application, the battery device includes a box cover, the box cover covers the box body, and at least a part of the box cover forms the first pressing member. In this way, the number of components of the battery device is reduced, which helps to reduce the overall weight of the battery device and achieve the purpose of lightweight design of the battery device.

[0025] In some embodiments of the present application, the battery device further includes a plurality of fourth pressing members, the extending direction of the fourth pressing members is perpendicular or parallel to the extending direction of the battery cell assemblies, the fourth pressing members are at least connected to two adjacent battery cells in the battery cell assemblies and are located between the two electrode terminals of the battery cells, and the fourth pressing members are insulated from the battery cells. Moreover, the battery cell is provided with a pressure relief mechanism, and the fourth pressing member is arranged in a dislocation manner with the pressure relief mechanism. The first pressing member and the fourth pressing member jointly limit the plurality of battery cells, so that the plurality of battery cells form an integral rigid structure in the assembly space, so that each battery cell has a unified vibration mode, thereby reducing the influence of the vibration on the connection pieces between the battery cells and improving the stability and reliability of the connection pieces between the battery cells.

[0026] In some embodiments of the present application, the fourth pressing member is fixedly connected to the battery cell by adhesive bonding; and / or, the fourth pressing member is an insulating member, and the fourth pressing member is fixedly connected to the battery cell by a fastener.

[0027] In some embodiments of the present application, both ends of the fourth pressing member are fixedly connected to the box body, further improving the limiting stability and reliability of the fourth pressing member for each battery cell.

[0028] In some embodiments of the present application, the first pressing member and the fourth pressing member are integrally formed. The integrated first pressing member and fourth pressing member can better cooperate with each other to limit multiple battery cells to form an integral rigid structure, further improving the stability and reliability of the connecting piece between the battery cells.

[0029] According to the second aspect of the embodiments of the present application, there is provided an electrical device. Wherein, the electrical device includes an electrical load; and, the electrical device further includes the battery device as described above, and the electrical load is electrically connected to the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 Structural schematic of the battery cell according to the embodiment of the present application Figure 1 ;

[0032] Figure 2 Structural schematic diagram of the battery device according to the embodiment of the present application, wherein the box cover is separated from the box body, and the first pressing member, the second pressing member, the third pressing member, the fourth pressing member, etc. are not assembled;

[0033] Figure 3 Top view schematic of a box body according to the embodiment of the present application;

[0034] Figure 4 Assembly structure schematic diagram of the battery cell assembly, connecting piece and first pressing member of the battery device according to the embodiment of the present application;

[0035] Figure 5 Assembly structure schematic of the battery cell assembly, connecting piece, first pressing member, second pressing member and third pressing member of the battery device according to the embodiment of the present application Figure 1 ;

[0036] Figure 6Structural schematic of the battery cell of the embodiment of the present application Figure 2 ;

[0037] Figure 7 Assembly structure schematic of the battery cell assembly, connecting piece, first pressing member, second pressing member and third pressing member of the battery device of the embodiment of the present application Figure 2 , wherein the first pressing member, the second pressing member and the third pressing member are independent components;

[0038] Figure 8 is Figure 7 Cross-sectional schematic view in the A-A direction in

[0039] Figure 9 Assembly structure schematic of the battery cell assembly, connecting piece, first pressing member, second pressing member and third pressing member of the battery device of the embodiment of the present application Figure 3 , wherein the first pressing member, the second pressing member and the third pressing member are independent components;

[0040] Figure 10 Assembly structure schematic of the battery cell assembly, connecting piece, first pressing member, second pressing member and third pressing member of the battery device of the embodiment of the present application Figure 4 , wherein the first pressing member, the second pressing member and the third pressing member are integrally formed components;

[0041] Figure 11 is Figure 10 Cross-sectional schematic view in the B-B direction in

[0042] Figure 12 Assembly structure schematic of the battery cell assembly, connecting piece, first pressing member, second pressing member and third pressing member of the battery device of the embodiment of the present application Figure 5 , wherein the first pressing member, the second pressing member and the third pressing member are independent components;

[0043] Figure 13 Assembly structure schematic of the battery cell assembly, connecting piece, first pressing member and fourth pressing member of the battery device of the embodiment of the present application Figure 1 ;

[0044] Figure 14 Assembly structure schematic of the battery cell assembly, connecting piece, first pressing member and fourth pressing member of the battery device of the embodiment of the present application Figure 2 ;

[0045] Figure 15 Assembly structure schematic of the battery cell assembly, connecting piece, first pressing member and fourth pressing member of the battery device of the embodiment of the present application Figure 3 ;

[0046] Figure 16 Schematic diagram of an assembly structure of an electrical device according to an embodiment of the present application.

[0047] Among them, the reference numerals in the figure are as follows:

[0048] 100. Battery cell assembly;

[0049] 10. Battery cell; 11. Electrode terminal; 111. Positive electrode terminal; 112. Negative electrode terminal; 12. Shoulder; 13. Pressure relief mechanism;

[0050] 20. Connecting piece;

[0051] 30. First pressing member;

[0052] 40. Second pressing member;

[0053] 50. Third pressing member;

[0054] 60. Fourth pressing member;

[0055] 200. Battery device; 210. Box body; 211. Bottom wall; 212. Circumferential surrounding wall; 213. Cross beam; 220. Box cover; 221. Cover plate; 230. Assembly space;

[0056] 400. Electrical device; 410. Electrical load; 420. Control device; 430. Frame; 440. Wheel. Detailed implementation manners

[0057] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation to the present application.

[0058] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0059] In addition, terms such as "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more such features. In the description of this application, "a plurality of" means two or more unless otherwise specifically defined.

[0060] In this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0061] Currently, from the perspective of the development of the market situation, the application of battery devices is becoming more and more extensive. Battery devices are not only applied to energy storage power systems such as hydraulic, thermal, wind, and solar power stations (battery devices for such applications are generally collectively referred to as energy storage batteries), but also widely applied to electric transportation means such as electric bicycles, electric motorcycles, and electric vehicles, as well as multiple fields such as military and police equipment and aerospace (battery devices for such applications are generally collectively referred to as power batteries). With the continuous development of the application technology of battery devices, the quality requirements for battery devices are also continuously improving.

[0062] In the related art, although the bottoms of multiple battery cells are fixedly bonded to the bottom wall of the box body by glue, however, between the tops of the multiple battery cells, in addition to using connecting pieces to connect to achieve series, parallel, or mixed connection, the tops of the multiple battery cells are in a relatively loose state, resulting in difficulty in effectively limiting the positions between the tops of the multiple battery cells, that is, it is difficult to form an overall rigid structure between the multiple battery cells. When the battery device is affected by vibration, each battery cell has a relatively independent vibration mode, and over time, it will cause damage to the structure of the battery device, such as loosening or fatigue fracture of the connecting piece.

[0063] Based on the above considerations, this application provides a battery device. After fixedly arranging multiple battery cells on the bottom wall and connecting the electrode terminals between the battery cells through connecting pieces, and by fixedly connecting a first pressing member to the connecting piece, the battery cells are restricted by the first pressing member, the connecting piece between adjacent battery cells, and the bottom wall, so that each battery cell has a unified vibration mode, thereby reducing the influence of vibration on the connecting piece between the battery cells and improving the stability and reliability of the connecting piece between the battery cells.

[0064] To illustrate the technical solutions provided by the embodiments of the present application, the following will be described in detail with reference to specific drawings and embodiments. Among them, as Figure 1 and Figure 6 shown, the coordinate axis X represents the width direction of the battery cell 10, the coordinate axis Y represents the length direction of the battery cell 10, and the coordinate axis Z represents the height direction of the battery cell 10; as Figure 4 , Figure 5 , Figures 7 to 15 shown, the arrow S represents the extending direction of the battery cell assembly 100.

[0065] According to the first aspect of the embodiments of the present application, the embodiments of the present application provide a battery device 200. As Figures 1 to 4 shown, the battery device 200 includes a box body 210, at least one first pressing member 30, a plurality of battery cells 10, and a plurality of connection pieces 20. The box body 210 has an assembly space 230, and the bottom of the assembly space 230 is the bottom wall 211 of the box body 210. A plurality of battery cells 10 are arranged in the assembly space 230 to form at least one battery cell assembly 100, and the battery cell assembly 100 is fixedly arranged on the bottom wall 211. Each battery cell 10 has an electrode terminal 11. The electrode terminals 11 between two adjacent battery cells 10 are electrically connected by a connection piece 20, that is, the plurality of battery cells 10 in a battery cell assembly 100 can be arranged in series, in parallel, or in a mixed connection according to the requirements of the output voltage. The first pressing member 30 is fixedly connected to the side of the connection piece 20 facing away from the battery cell 10. The extending direction of the first pressing member 30 is consistent with the extending direction S of the battery cell assembly 100. The first pressing member 30 is fixedly connected between at least two connection pieces 20 of the battery cell assembly 100, and the connection piece 20 and the first pressing member 30 are insulated from each other.

[0066] In the battery device 200 of the present application, a plurality of battery cells 10 are arranged in an assembly space 230 to form at least one battery cell assembly 100. The bottom of the battery cell assembly 100 is fixedly arranged on the bottom wall 211 (that is, each battery cell 10 is fixedly assembled and limited on the bottom wall 211). Moreover, in the battery cell assembly 100, not only are the electrode terminals 11 between two adjacent battery cells 10 connected by a connecting piece 20, but also a first pressing member 30 is fixedly connected to the side of the connecting piece 20 facing away from the battery cell 10, and the first pressing member 30 is fixedly connected to at least two connecting pieces 20 of the battery cell assembly 100. In this way, the battery cell assembly 100 is restricted by the common cooperation of the bottom wall 211, the connecting piece 20, and the first pressing member 30 in the assembly space 230, so that the battery cell assembly 100 forms an integral rigid structure in the assembly space 230. When the battery device 200 is affected by vibration, since the battery cell assembly 100 forms an integral rigid structure, the battery cells 10 will be restricted by the first pressing member 30, the connecting piece 20 between adjacent battery cells 10, and the bottom wall 211, so that each battery cell 10 has a unified vibration mode, thereby reducing the influence of the vibration on the connecting piece 20 between the battery cells 10, improving the stability and reliability of the connecting piece 20 between the battery cells 10, and improving the overall vibration resistance performance of the battery device 200, that is, enhancing the overall vibration resistance mode of the battery device 200.

[0067] For some small battery devices 200 or long and narrow battery devices 200, a plurality of battery cells 10 are only arranged in the box body 210 to form one battery cell assembly 100. At this time, the battery device 200 includes one first pressing member 30 or two first pressing members 30. When the battery device 200 includes one first pressing member 30, the first pressing member 30 may be fixedly connected only to the connecting piece 20 on one column of electrode terminals 11 of the battery cell assembly 100, and at least part of the vertical projection of the first pressing member 30 coincides with the vertical projection of the connecting piece 20; or, the first pressing member 30 may cover the connecting pieces 20 on two columns of electrode terminals 11 of the battery cell assembly 100 at the same time, and at least part of the vertical projections of all the connecting pieces 20 are located within the vertical projection of the first pressing member 30. When the battery device 200 includes two first pressing members 30, the two first pressing members 30 respectively cover the connecting pieces 20 on two columns of electrode terminals 11 of the battery cell assembly 100, and the two first pressing members 30 may be arranged at intervals or spliced together, and at least part of the vertical projection of each first pressing member 30 coincides with the vertical projection of the corresponding connecting piece 20.

[0068] In some embodiments of the present application, for some larger battery devices 200 or battery devices 200 in the shape of a cuboid, such as Figure 5 , Figures 7 to 15As shown, a plurality of battery cells 10 are arranged to form a plurality of juxtaposed battery cell assemblies 100, that is, the plurality of battery cell assemblies 100 are juxtaposed in a direction perpendicular to the direction S. In this battery device 200, at least two connecting pieces 20 of each battery cell assembly 100 are fixedly connected by a first pressing member 30. In this way, the plurality of battery cell assemblies 100 are restricted by the combined action of the bottom wall 211, the connecting pieces 20 and the first pressing member 30 in the assembly space 230, so that the plurality of battery cell assemblies 100 form an integral rigid structure in the assembly space 230. When the battery device 200 is affected by vibration, the battery cells 10 of the battery device 200 will be restricted by the first pressing member 30, the connecting pieces 20 between adjacent battery cells 10 and the bottom wall 211, so that each battery cell 10 has a unified vibration mode, thereby improving the stability and reliability of the connecting pieces 20 between the battery cells 10, improving the overall vibration resistance performance of the battery device 200, that is, enhancing the overall vibration resistance mode of the battery device 200.

[0069] The following descriptions are all based on a plurality of battery cells 10 arranged to form a plurality of juxtaposed battery cell assemblies 100. The electrode terminals 11 of each battery cell 10 include a positive electrode terminal 111 and a negative electrode terminal 112. When the extending direction of the battery cell assembly 100 is the direction S as shown in Figure 4 and Figure 5 , each battery cell assembly 100 has two columns of electrode terminals 11, one column of electrode terminals 11 includes a positive electrode terminal 111 and a negative electrode terminal 112, and the other column of electrode terminals 11 also includes a positive electrode terminal 111 and a negative electrode terminal 112; when the extending direction of the battery cell assembly 100 is the direction S as shown in Figure 7 , Figure 8 , Figures 10 to 12 , each battery cell assembly 100 has only one column of electrode terminals 11, and this column of electrode terminals 11 is arranged in an alternating order of positive electrode terminals 111 and negative electrode terminals 112.

[0070] In some embodiments of the present application, the first pressing member 30 can be a plate-like member, and the first pressing member 30 of this plate-like member is fixedly connected to the connecting pieces 20 on all the battery cells 10. Along the height direction Z, it can be that the vertical projection range of the connecting pieces 20 of all the battery cells 10 is within the vertical projection range of the first pressing member 30, and at this time the first pressing member 30 covers all the connecting pieces 20; it can be that the vertical projection of the first pressing member 30 partially coincides with the vertical projection of the connecting pieces 20 of all the battery cells 10, and at this time the first pressing member 30 covers some connecting pieces 20, and a part of some connecting pieces 20 is exposed outside the first pressing member 30.

[0071] Alternatively, in some other embodiments of the present application, the number of the first pressing members 30 is plural. At this time, the first pressing members 30 are strip-shaped (i.e., strip members), and at least one first pressing member 30 is correspondingly arranged for each battery cell assembly 100. In this embodiment, one strip-shaped first pressing member 30 may be correspondingly arranged for each battery cell assembly 100. At this time, the connecting pieces 20 on one column of electrode terminals 11 of each battery cell assembly 100 are fixedly connected to the corresponding one first pressing member 30. Alternatively, in this embodiment, two strip-shaped first pressing members 30 may also be correspondingly arranged for each battery cell assembly 100. At this time, the connecting pieces 20 on two columns of electrode terminals 11 of each battery cell assembly 100 are respectively fixedly connected to the two first pressing members 30.

[0072] To further improve the limiting stability and reliability of the first pressing member 30 on each battery cell 10, and enhance the vibration resistance of the multiple battery cells 10 and multiple connecting pieces in the overall rigid structure, as Figure 3 shown, the box body 210 further has a circumferential enclosing wall 212. The bottom wall 211 and the circumferential enclosing wall 212 enclose an assembly space 230 of the box body 210 for assembling and accommodating multiple battery cells 10. And, both ends of the first pressing member 30 are respectively fixedly connected to the circumferential enclosing wall 212. The first pressing member 30 of this embodiment may be fixedly connected to the circumferential enclosing wall 212 at both ends along the direction S. At this time, the first pressing member 30 may be a plate-shaped member (the edge area of the first pressing member 30 along the direction perpendicular to the direction S is at least fixedly connected to the connecting pieces 20 on at least one column of electrode terminals 11 of the outermost battery cell assembly 100), or may be multiple strip-shaped members; alternatively, the first pressing member 30 of this embodiment may also be fixedly connected to the circumferential enclosing wall 212 at both ends along the direction perpendicular to the direction S. At this time, the first pressing member 30 may be a plate-shaped member, and the first pressing member 30 covers the connecting pieces 20 on all the electrode terminals 11; or, the first pressing member 30 of this embodiment may also be fixedly connected to the circumferential enclosing wall 212 at both ends along the direction S and at both ends along the direction perpendicular to the direction S. At this time, the first pressing member 30 may be a plate-shaped member, and the first pressing member 30 covers the connecting pieces 20 on all the electrode terminals 11. In this way, the circumferential enclosing wall 212 of the box body 210 provides a connecting force and a supporting force for the first pressing member 30, so as to improve the limiting stability and reliability of the first pressing member 30 on each battery cell 10 when the battery device 200 is affected by vibration, and enhance the vibration resistance of the multiple battery cells 10 and multiple connecting pieces 20 in the overall rigid structure.

[0073] Combined with Figure 5 、 Figure 7 、 Figure 8 、 Figures 10 to 12 and Figure 1 、Figure 6 As shown, along the extension direction of the battery cell assembly 100 (i.e., along the direction S), shoulders 12 are provided on both sides of the battery cell 10. In some embodiments of the present application, such as Figure 5 As shown, the battery device 200 further includes a plurality of second pressing members 40. Each second pressing member 40 is strip-shaped, and the extension direction of the second pressing member 40 is perpendicular to the extension direction of the battery cell assembly 100 (i.e., the extension direction of the second pressing member 40 is a direction perpendicular to the direction S). During the process of manufacturing the battery device 200, first, a plurality of battery cells 10 are assembled into the assembly space 230, then the second pressing members 40 are fixedly connected to two opposite shoulders 12 between two adjacent battery cells 10 in two adjacent battery cell assemblies 100, and the second pressing member 40 is insulated from the battery cell 10. Then, the electrode terminals 11 between the battery cells 10 are connected by the connecting piece 20, and the first pressing member 30 is fixedly connected to at least a part of the corresponding connecting piece 20. In this way, on the basis that the battery cell 10 is restricted by the first pressing member 30, the connecting piece 20 between the adjacent battery cells 10, and the bottom wall 211, the battery cell 10 is further restricted by the corresponding second pressing member 40, so that the overall rigid structure formed by the plurality of battery cell assemblies 100 in the assembly space 230 is further stabilized, thereby further enabling each battery cell 10 to have a unified vibration mode, further reducing the influence of the vibration on the connecting piece 20 between the battery cells 10, improving the stability and reliability of the connecting piece 20 between the battery cells 10, and improving the overall vibration resistance performance of the battery device 200.

[0074] In some embodiments of the present application, the extension direction of the second pressing member 40 is parallel to the extension direction of the battery cell assembly 100, such as Figure 9 As shown, and the extension direction of the first pressing member 30 is parallel to the extension direction of the battery cell assembly 100. Optionally, the first pressing member 30 is a plate-shaped member or a strip-shaped member. In this way, on the basis that the battery cell 10 is restricted by the first pressing member 30, the connecting piece 20 between the adjacent battery cells 10, and the bottom wall 211, the battery cell 10 is further restricted by the corresponding second pressing member 40, so that the overall rigid structure formed by the plurality of battery cell assemblies 100 in the assembly space 230 is further stabilized, thereby further enabling each battery cell 10 to have a unified vibration mode, further reducing the influence of the vibration on the connecting piece 20 between the battery cells 10, improving the stability and reliability of the connecting piece 20 between the battery cells 10, and improving the overall vibration resistance performance of the battery device 200.

[0075] In the battery cell assembly 100, along its height direction (i.e., along the height direction Z of the battery cell 10), the height from the surface of the connecting piece 20 facing away from the battery cell 10 to the top surface of the battery cell 10 is greater than or equal to the height from the surface of the second pressing member 40 facing away from the battery cell 10 to the top surface of the battery cell 10 (in the embodiments of the present application, the top surface of the battery cell 10 is the surface provided with the electrode terminal 11). This avoids the situation where the first pressing member 30 and the second pressing member 40 interfere with each other along the height direction Z during the assembly process, thereby successfully assembling the second pressing member 40 and the first pressing member 30 and improving the assembly efficiency. Optionally, the height from the surface of the connecting piece 20 facing away from the battery cell 10 to the top surface of the battery cell 10 is greater than the height from the surface of the second pressing member 40 facing away from the battery cell 10 to the top surface of the battery cell 10.

[0076] In some embodiments of the present application, the second pressing member 40 and the shoulder 12 are fixedly connected by adhesive bonding (adhesive bonding is also referred to as an assembly method of crimping and fixing with adhesive). That is, liquid adhesive is coated on the shoulder 12 of the battery cell 10, and then the second pressing member 40 is bonded to the adhesive on the shoulder 12. After the adhesive cures, the second pressing member 40 and the shoulder 12 are fixedly connected together by the adhesive. Moreover, the adhesive can be insulating adhesive, and insulation between the second pressing member 40 and the battery cell 10 is achieved through the insulating adhesive. In this embodiment, the second pressing member 40 can be made of metal material or plastic material.

[0077] In order to further improve the limiting stability and reliability of the second pressing member 40 on each battery cell 10 and enhance the vibration resistance of multiple battery cells 10 and multiple connecting pieces 20 in the overall rigid structure, therefore, both ends of the second pressing member 40 are fixedly connected to the circumferential wall 212 of the box body 210.

[0078] In some embodiments of the present application, the first pressing member 30 and the connecting piece 20 are fixedly connected by adhesive bonding. That is, liquid adhesive is coated on the connecting piece 20, and then the first pressing member 30 is bonded to the adhesive on the connecting piece 20. After the adhesive cures, the first pressing member 30 and the connecting piece 20 are fixedly connected together by the adhesive. Moreover, the adhesive can be insulating adhesive, and insulation between the first pressing member 30 and the connecting piece 20 is achieved through the insulating adhesive. In this embodiment, the first pressing member 30 can be made of metal material or plastic material.

[0079] In some embodiments of the present application, the second pressing member 40 is an insulating component, and the second pressing member 40 and the shoulder 12 are fixedly connected by fasteners, and the fasteners can be screws or bolts. In this embodiment, the shoulder 12 is provided with threaded holes, or nuts are fixedly embedded in the shoulder 12.

[0080] In some embodiments of the present application, the first pressing member 30 is an insulating member. The first pressing member 30 and the connecting piece 20 are fixedly connected by fasteners, and the fasteners can be screws or bolts. In this embodiment, the first pressing member 30 and the connecting piece 20 can be fixedly arranged on the electrode terminal 11 by fasteners at the same time. For example, threaded holes or embedded fixing nuts can be provided on the electrode terminal 11. Alternatively, the connecting piece 20 and the electrode terminal 11 are laser welded, and then the first pressing member 30 is fixedly arranged on the connecting piece 20 by fasteners. For example, threaded holes or embedded fixing nuts can be provided on the connecting piece 20.

[0081] In some embodiments, both the first pressing member 30 and the connecting piece 20 and the second pressing member 40 and the shoulder 12 are fixedly bonded by glue. Alternatively, in some embodiments, the first pressing member 30 and the connecting piece 20 are fixedly bonded by glue, the second pressing member 40 is an insulating member, and the second pressing member 40 and the shoulder 12 are fixedly connected by fasteners. Alternatively, in some embodiments, the first pressing member 30 is an insulating member and the first pressing member 30 and the connecting piece 20 are fixedly connected by fasteners, and the second pressing member 40 and the shoulder 12 are fixedly bonded by glue. Or, in some embodiments, both the first pressing member 30 and the second pressing member 40 are insulating members, and the first pressing member 30 and the connecting piece 20 are fixedly connected by fasteners, and the second pressing member 40 and the shoulder 12 are fixedly connected by fasteners.

[0082] In the embodiments of the present application, the battery cell 10 can be a square battery cell, or the battery cell 10 can also be a cylindrical battery cell. The battery cell 10 can be a secondary battery, which means that after the battery cell 10 discharges, it can be activated by charging and continue to be used. The battery cell 10 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-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc. The embodiments of the present application are not limited thereto. When the extending direction of the battery cell assembly 100 is the direction S as shown in Figure 7 , Figure 8 , Figures 10 to 12 , the extending direction of the second pressing member 40 is perpendicular to the length direction Y of the battery cell 10; when the extending direction of the battery cell assembly 100 is the direction S as shown in Figure 4 and Figure 5 , the extending direction of the second pressing member 40 is parallel to the length direction Y of the battery cell 10; when the extending direction of the battery cell assembly 100 is the direction S as shown in Figure 9 , the extending direction of the second pressing member 40 is perpendicular to the length direction Y of the battery cell 10.

[0083] In some embodiments of the present application, as shown in Figure 5, Figure 7 , Figure 8 , Figures 10 to 12 As shown in Figure 7 , Figure 8 , and Figures 10 to 12 , the battery device 200 further includes two third pressing members 50. The extending direction of the third pressing member 50 is perpendicular to the extending direction of the battery cell assembly 100. That is to say, the extending direction of the third pressing member 50 is parallel to the extending direction of the second pressing member 40. The two third pressing members 50 are respectively fixedly connected to the shoulders 12 of the battery cells 10 in the battery cell assemblies 100 located at both ends along the arrangement direction of the plurality of battery cell assemblies 100, and the third pressing member 50 is insulated from the battery cell 10. By providing the third pressing members 50, the plurality of battery cell assemblies 100 form a more reliable overall rigid structure in the assembly space 230. When the battery device 200 is affected by vibration, on the basis that the battery cell 10 is restricted by the first pressing member 30, the second pressing member 40, the connecting piece 20 between adjacent battery cells 10, and the bottom wall 211, the battery cell 10 is further restricted by the two third pressing members 50, so that each battery cell 10 further has a unified vibration mode, thereby improving the stability and reliability of the connecting piece 20 between the battery cells 10 and enhancing the overall anti-vibration mode of the battery device 200.

[0084] In some embodiments of the present application, the extending direction of the third pressing member 50 is parallel to the extending direction of the battery cell assembly 100, as Figure 9 shown, and the extending direction of the first pressing member 30 is parallel to the extending direction of the battery cell assembly 100. Optionally, the first pressing member 30 is a plate-shaped member or a strip-shaped member. By providing the third pressing members 50, the plurality of battery cell assemblies 100 form a more reliable overall rigid structure in the assembly space 230. When the battery device 200 is affected by vibration, on the basis that the battery cell 10 is restricted by the first pressing member 30, the second pressing member 40, the connecting piece 20 between adjacent battery cells 10, and the bottom wall 211, the battery cell 10 is further restricted by the two third pressing members 50, so that each battery cell 10 further has a unified vibration mode, thereby improving the stability and reliability of the connecting piece 20 between the battery cells 10 and enhancing the overall anti-vibration mode of the battery device 200.

[0085] In some embodiments of the present application, the third pressing member 50 is fixedly connected to the shoulder 12 by adhesive bonding. That is, a liquid adhesive is coated on the shoulder 12 of the corresponding battery cell 10, and then the third pressing member 50 is bonded to the adhesive on the shoulder 12. After the adhesive is cured, the third pressing member 50 is fixedly connected to the corresponding shoulder 12 by the adhesive. And the adhesive can be an insulating adhesive, and the third pressing member 50 and the battery cell 10 are insulated from each other through the insulating adhesive. In this embodiment, the third pressing member 50 can be made of a metal material or a plastic material.

[0086] In some embodiments of the present application, the third pressing member 50 is an insulating member. The third pressing member 50 is fixedly connected to the corresponding shoulder 12 through a fastener, and the fastener can be a screw or a bolt. In this embodiment, the corresponding shoulder 12 is provided with a threaded hole, or a nut is fixedly embedded in the corresponding shoulder 12.

[0087] In order to further improve the limiting stability and reliability of the third pressing member 50 on the multiple battery cell assemblies 100, and enhance the vibration resistance of the multiple battery cells 10 and the multiple connecting pieces 20 in the overall rigid structure, therefore, both ends of the two third pressing members 50 are fixedly connected to the circumferential wall 212 of the box body 210.

[0088] In order to improve the overall structural strength of the box body 210, as Figure 3 shown, the battery device 200 further includes at least one cross beam 213. Both ends of the cross beam 213 are respectively connected to the circumferential wall 212 of the box body 210. The cross beam 213 divides the assembly space 230 into at least two spaces. The battery device 200 of the present application only includes one cross beam 213, and the cross beam 213 divides the assembly space 230 into a first space and a second space. The multiple battery cell assemblies 100 are assembled in the first space and the second space. Moreover, at least one of the first pressing member 30, the second pressing member 40, and the third pressing member 50 straddles the cross beam 213 and is fixedly connected to the cross beam 213. Thus, the cross beam 213 provides a connecting force and a supporting force to at least one of the first pressing member 30, the second pressing member 40, and the third pressing member 50, so as to further improve the limiting stability and reliability of at least one of the first pressing member 30, the second pressing member 40, and the third pressing member 50 on the battery cell assemblies 100 when the battery device 200 is affected by vibration, and further enhance the vibration resistance of the multiple battery cells 10 and the multiple connecting pieces 20 in the overall rigid structure.

[0089] In some embodiments of the present application, the first pressing member 30 and the second pressing member 40 are integrally formed; or, the first pressing member 30 and the third pressing member 50 are integrally formed. Thus, the integrated first pressing member 30 and second pressing member 40 or the integrated first pressing member 30 and third pressing member 50 can better cooperate with each other to limit the multiple battery cells 10 to form an overall rigid structure, and further improve the stability and reliability of the connecting pieces 20 between the battery cells 10.

[0090] Alternatively, in some embodiments of the present application, the first pressing member 30, the second pressing member 40, and the third pressing member 50 are integrally formed. At this time, the first pressing member 30 is a plate-like member. In this way, the first pressing member 30, the second pressing member 40, and the third pressing member 50 are integrated components as a whole, which not only reduces the assembly steps of assembling and producing the battery device 200 and improves the assembly efficiency, but also the integrated first pressing member 30, second pressing member 40, and third pressing member 50 can better cooperate with each other to limit the plurality of battery cells 10 to form an integral rigid structure, further improving the stability and reliability of the connection piece 20 between the battery cells 10, and further improving the overall vibration resistance performance of the battery device 200, that is, further enhancing the overall vibration resistance mode of the battery device 200.

[0091] As Figure 2 shown, in some embodiments of the present application, the battery device 200 includes a box cover 220, the box cover 220 covers the box body 210, and at least a part of the box cover 220 is formed as the first pressing member 30. For example, the box cover 220 includes a cover plate 221, and the cover plate 221 is the plate-like first pressing member 30. The box cover 220 is generally an aluminum component, and insulation can be achieved between the cover plate 221 and the connection piece 20 by providing an insulating layer between the cover plate 221 and the connection piece 20. In this embodiment, at least a part of the box cover 220 is reasonably utilized to form the limiting function of the above-mentioned first pressing member 30 on the plurality of battery cell assemblies 100, reducing the number of components of the battery device 200, helping to reduce the overall weight of the battery device 200, and achieving the purpose of lightweight design of the battery device 200.

[0092] In some embodiments of the present application, on the basis that the battery device 200 includes the first pressing member 30, the battery device 200 further includes a plurality of fourth pressing members 60, as Figure 13 and Figure 15 shown, the extending direction of the fourth pressing member 60 is perpendicular to the extending direction of the battery cell assembly 100. The fourth pressing member 60 is connected to two adjacent battery cells 10 in the battery cell assembly 100 and is located between the two electrode terminals 11 of the battery cell 10. The fourth pressing member 60 is insulated from the battery cell 10. In this embodiment, the first pressing member 30 and the fourth pressing member 60 jointly limit the plurality of battery cells 10, so that the plurality of battery cells 10 form an integral rigid structure in the assembly space 230, enabling each battery cell 10 to have a unified vibration mode, thereby reducing the influence of vibration on the connection piece 20 between the battery cells 10, improving the stability and reliability of the connection piece 20 between the battery cells 10, and improving the overall vibration resistance performance of the battery device 200, that is, enhancing the overall vibration resistance mode of the battery device 200.

[0093] Moreover, the battery cell 10 is provided with a pressure relief mechanism 13, asFigure 13 and Figure 15 As shown, the fourth pressing member 60 is arranged out of alignment with the pressure relief mechanism 13, thereby avoiding the situation where the fourth pressing member 60 blocks the pressure relief mechanism 13 and ensuring that the high-temperature flue gas inside the battery cell 10 can be smoothly discharged from the pressure relief mechanism 13 when a thermal runaway occurs in the battery cell 10. Alternatively, in some embodiments, the fourth pressing member 60 only covers a part of the pressure relief mechanism 13. When a thermal runaway occurs in the battery cell 10, the high-temperature flue gas inside the battery cell 10 can still smoothly actuate and open the pressure relief mechanism 13 and be discharged from the pressure relief mechanism 13. Or, in some embodiments, the fourth pressing member 60 is provided with an avoidance structure for avoiding the pressure relief mechanism 13, such as a groove or a through hole, so that when a thermal runaway occurs in the battery cell 10, the pressure relief mechanism 13 is actuated and opened by the high-temperature flue gas inside the battery cell 10, and the high-temperature flue gas can be smoothly discharged from the pressure relief mechanism 13 and the avoidance structure.

[0094] Among them, the pressure relief mechanism 13 refers to an element or component that is actuated to release the internal pressure when the internal pressure or temperature of the battery cell 10 reaches a predetermined threshold. Among them, "actuated" means that the pressure relief mechanism 13 generates an action, so that the internal pressure and temperature of the battery cell 10 can be released. The actions generated by the pressure relief mechanism 13 may include, but are not limited to: at least a part of the pressure relief mechanism 13 breaks, is torn, or melts, etc. After the pressure relief mechanism 13 is actuated, the high-temperature flue gas inside the battery cell 10 will be discharged outwards from the pressure relief mechanism 13. The predetermined threshold can be adjusted according to different design requirements. The predetermined threshold may depend on one or several materials among the positive electrode plate, negative electrode plate, electrolyte, and separator in the battery cell 10. The pressure relief mechanism 13 can adopt elements or components that are sensitive to pressure or temperature, that is, when the internal pressure or temperature of the battery cell 10 reaches a predetermined threshold, the pressure relief mechanism 13 is actuated, thereby forming a channel for releasing the internal pressure.

[0095] In some embodiments of the present application, the extending direction of the fourth pressing member 60 is parallel to the extending direction of the battery cell assembly 100, as Figure 14 shown, and the extending direction of the first pressing member 30 is parallel to the extending direction of the battery cell assembly 100. Optionally, the first pressing member 30 is a plate-shaped member or a strip-shaped member. In this embodiment, the first pressing member 30 and the fourth pressing member 60 jointly limit a plurality of battery cells 10, so that the plurality of battery cells 10 form an integral rigid structure in the assembly space 230, so that each battery cell 10 has a unified vibration mode, thereby reducing the influence of the vibration effect on the connection piece 20 between the battery cells 10, improving the stability and reliability of the connection piece 20 between the battery cells 10, and improving the overall vibration resistance performance of the battery device 200, that is, enhancing the overall vibration resistance mode of the battery device 200.

[0096] In some embodiments, the fourth pressing member 60 and the battery cell 10 are fixedly connected by adhesive bonding. Liquid adhesive is coated on the battery cell 10, and then the fourth pressing member 60 is bonded to the adhesive. After the adhesive is cured, the fourth pressing member 60 and the battery cell 10 are fixedly connected together by the adhesive. Moreover, the adhesive can be insulating adhesive, and insulation between the fourth pressing member 60 and the battery cell 10 is achieved through the insulating adhesive. In this embodiment, the fourth pressing member 60 can be made of metal material or plastic material.

[0097] In some other embodiments, the fourth pressing member 60 is an insulating component, and the fourth pressing member 60 and the shoulder 12 are fixedly connected by a fastener, and the fastener can be a screw or a bolt. In this embodiment, threaded holes are provided at corresponding positions of the battery cell 10, or nuts are fixedly embedded at corresponding positions of the battery cell 10.

[0098] In some embodiments of the present application, the first pressing member 30 and the fourth pressing member 60 are integrally formed. In this way, the first pressing member 30 and the fourth pressing member 60 are an integrated component as a whole, which not only reduces the assembly steps of assembling and producing the battery device 200 and improves the assembly efficiency, but also the integrated first pressing member 30 and fourth pressing member 60 can better cooperate with each other to limit a plurality of battery cells 10 to form an integral rigid structure, further improving the stability and reliability of the connection piece 20 between the battery cells 10, and further improving the overall vibration resistance performance of the battery device 200, that is, further enhancing the overall vibration resistance mode of the battery device 200.

[0099] In order to further improve the limiting stability and reliability of the fourth pressing member 60 to each battery cell 10 and enhance the vibration resistance ability of a plurality of battery cells 10 and a plurality of connection pieces in the overall rigid structure, therefore, both ends of the fourth pressing member 60 are fixedly connected to the circumferential wall 212 of the box body 210.

[0100] In some embodiments of the present application, on the basis that the battery device 200 is provided with the first pressing member 30 and the fourth pressing member 60, the battery device 200 can also be provided with the second pressing member 40 and / or the third pressing member 50.

[0101] According to the second aspect of the embodiments of the present application, the embodiments of the present application also provide an electrical equipment 400, and the electrical equipment 4 includes an electrical load 410.

[0102] The electrical equipment 400 includes, but is not limited to, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, the electric toys may include, but are not limited to, stationary or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, etc. The spacecraft may include, but is not limited to, airplanes, rockets, space shuttles, and spaceships, etc.

[0103] In some embodiments of the present application, the electrical equipment 400 further includes the battery device 200 as described above, that is, the electrical equipment 400 uses one battery device 200 or multiple battery devices 200 in series, parallel, or series-parallel connection, and the electrical load 410 is electrically connected to the battery device 200. The battery device 200 is used to store electrical energy, or the battery device 200 is used to supply electrical energy to the electrical load 410, so that the electrical load 410 can operate normally.

[0104] Among them, the electrical equipment 400 is an electric vehicle and is assembled with the battery device 200. As Figure 16 shown, the battery device 200 is installed on the vehicle frame 430 of the electric vehicle. The electric vehicle includes a vehicle frame 430, a drive motor, and wheels 440. The battery device 200 and the drive motor are both fixedly installed on the vehicle frame 430, the wheels 440 are rotatably connected to the vehicle frame 430, and the battery device 200 is electrically connected to the drive motor, and the drive motor is drivingly connected to the wheels 440. Applying the battery device 200 provided by the present application to supply power to the drive motor (the drive motor is one of the electrical loads 410 of the electrical equipment 400), the drive motor drives the wheels 440 to rotate, so that the electric vehicle can drive normally. And the electric vehicle includes a control device 420, the control device 420 is installed on the vehicle frame 430, the control device 420 is electrically connected to the battery device 200, and the control device 420 is used to control and monitor the charge and discharge working state of the battery device 200. In some electric vehicles, the battery box of the battery device 200 can be used as a part of the chassis structure of the electric vehicle. For example, a part of the battery box can become at least a part of the floor of the electric vehicle, or a part of the battery box can become at least a part of the cross beam and longitudinal beam of the electric vehicle.

[0105] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that, Comprising: A box body having an assembly space and a bottom wall; A plurality of battery cells arranged in the assembly space to form at least one battery cell assembly, the battery cell assembly being fixedly arranged on the bottom wall, and the battery cell having electrode terminals; A plurality of connecting pieces, the electrode terminals between adjacent two of the battery cells being electrically connected through the connecting pieces; At least one first pressing member fixedly connected to a side of the connecting piece facing away from the battery cell, an extending direction of the first pressing member being consistent with an extending direction of the battery cell assembly, at least two of the connecting pieces of the battery cell assembly being fixedly connected to the first pressing member, and the first pressing member being insulated from the connecting piece.

2. The battery device according to claim 1, wherein The plurality of battery cells are arranged to form a plurality of the battery cell assemblies arranged in parallel, and at least two of the connecting pieces of each battery cell assembly are fixedly connected to the first pressing member.

3. The battery device according to claim 1, wherein The box body further has a circumferential surrounding wall, the bottom wall and the circumferential surrounding wall enclosing to form the assembly space, and two ends of the first pressing member are respectively fixedly connected to the circumferential surrounding wall.

4. The battery device according to claim 1, wherein The first pressing member is a plate-shaped member fixedly connected to the connecting pieces on all of the battery cells; Or, the first pressing member is a plurality of strip-shaped members, and at least one first pressing member is correspondingly arranged for one battery cell assembly.

5. The battery device according to any one of claims 1-4, wherein The first pressing member and the connecting piece are fixedly bonded by glue; And / or, the first pressing member is an insulating member, and the first pressing member and the connecting piece are fixedly connected by fasteners.

6. The battery device according to any one of claims 2-4, wherein Along the extending direction of the battery cell assembly, shoulders are provided on both sides of the battery cell; the battery device further includes a plurality of second pressing members, an extending direction of the second pressing member being perpendicular or parallel to the extending direction of the battery cell assembly, the second pressing member being fixedly connected to two shoulders opposite to each other between adjacent two battery cells in adjacent two battery cell assemblies, and the second pressing member being insulated from the battery cell.

7. The battery device according to claim 6, wherein Two ends of the second pressing member are fixedly connected to the box body.

8. The battery device according to claim 6, wherein Along the height direction of the battery cell, a height from a surface of the connecting piece facing away from the battery cell to a top side surface of the battery cell is greater than or equal to a height from a surface of the second pressing member facing away from the battery cell to the top side surface of the battery cell.

9. The battery device according to claim 6, wherein The second pressing member and the shoulder are fixedly bonded by glue; And / or, the second pressing member is an insulating member, and the second pressing member and the shoulder are fixedly connected by a fastener.

10. The battery device according to claim 6, wherein the battery device further includes two third pressing members, the extending direction of the third pressing member is perpendicular or parallel to the extending direction of the battery cell assembly, and the two third pressing members are respectively fixedly connected to the shoulders of the battery cells in the battery cell assemblies located at both ends along the arrangement direction of the plurality of battery cell assemblies, and the third pressing member is insulated from the battery cell.

11. The battery device according to claim 10, wherein the third pressing member and the corresponding shoulder are fixedly bonded by glue; And / or, the third pressing member is an insulating member, and the third pressing member and the corresponding shoulder are fixedly connected by a fastener.

12. The battery device according to claim 10, wherein both ends of the third pressing member are fixedly connected to the box body.

13. The battery device according to claim 10, wherein the battery device further includes at least one cross beam, both ends of the cross beam are respectively connected to the box body, the cross beam divides the assembly space into at least two spaces, and at least one of the first pressing member, the second pressing member and the third pressing member straddles the cross beam and is fixedly connected to the cross beam.

14. The battery device according to claim 10, wherein the first pressing member and the second pressing member are integrally formed; And / or, the first pressing member and the third pressing member are integrally formed.

15. The battery device according to any one of claims 1-4, wherein the battery device includes a box cover, the box cover covers the box body, and at least a part of the box cover forms the first pressing member.

16. The battery device according to any one of claims 1-4, wherein the battery device further includes a plurality of fourth pressing members, the extending direction of the fourth pressing member is perpendicular or parallel to the extending direction of the battery cell assembly, the fourth pressing member is at least connected to two adjacent battery cells in the battery cell assembly and is located between the two electrode terminals of the battery cell, and the fourth pressing member is insulated from the battery cell.

17. The battery device according to claim 16, wherein the battery cell is provided with a pressure relief mechanism, and the fourth pressing member and the pressure relief mechanism are arranged in a dislocation manner.

18. The battery device according to claim 16, wherein the fourth pressing member and the battery cell are fixedly bonded by glue; And / or, the fourth pressing member is an insulating member, and the fourth pressing member and the battery cell are fixedly connected by a fastener.

19. The battery device according to claim 16, wherein both ends of the fourth pressing member are fixedly connected to the box body.

20. The battery device according to claim 16, wherein the first pressing member and the fourth pressing member are integrally formed.

21. An electrical device, characterized in that, including an electrical load; The electrical device further includes a battery device as described in any one of claims 1-20, and the electrical load is electrically connected to the battery device.

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