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. Wherein the battery device comprises at least one battery monomer group, a battery box, a sampling assembly and a plurality of confluence pieces, the battery monomer group comprises a plurality of battery monomers arranged along a first direction, each battery monomer comprises a main body part and an electrode terminal, the battery box comprises a box body and a box cover which are mutually covered along a second direction, and the box cover is provided with a through hole; a plurality of positioning structures are arranged on the side, facing the box body, of the box cover, the sampling assemblies are arranged on the side, facing the box body, of the box cover, the sampling assemblies extend in the first direction and are located between two columns of electrode terminals of the corresponding battery monomer sets, the convergence pieces are connected to the positioning structures in a positioning mode, and at least part of the convergence pieces are opposite to the through holes. And the confluence pieces are electrically connected with the sampling assembly and are welded with the corresponding electrode terminals. By applying the technical scheme, the problem that the production efficiency of the battery assembly production device is limited by the current assembly production process mode is solved.

Description

TECHNICAL FIELD

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

[0002] At present, the production process mode of the assembled battery device is generally as follows: first, the battery monomer is installed into the box body of the battery box and arranged into a battery monomer group, then the busbar is connected to realize the series connection, parallel connection or mixed connection of the battery monomers, then the sampling assembly is assembled, and finally the box cover of the battery box is covered and sealed. However, this step-by-step production process can only be carried out after the previous process is completed. Once a problem occurs in the middle process, the entire production process chain will be stalled, which limits the flexibility of the production process and the production efficiency of the assembled battery device. CONTENT OF THE UTILITY MODEL

[0003] The application aims to provide a battery device and an electric equipment, and aims to solve the problem that the current assembly production process mode limits the production efficiency of the assembled battery device.

[0004] To achieve the above-mentioned purpose, according to the first aspect of the embodiment of the application, a battery device is provided, which comprises at least one battery monomer group, a battery box, a sampling assembly and a plurality of busbars. The battery monomer group comprises a plurality of battery monomers arranged along a first direction. The battery monomer comprises a main body and an electrode terminal arranged on the main body. The battery box comprises a box body and a box cover. The box body and the box cover are covered with each other along a second direction. The plurality of battery monomer groups are accommodated in the battery box. The electrode terminal is opposite to the box cover. The box cover is provided with a through hole. The side of the box cover facing the box body is provided with a plurality of positioning structures. The sampling assembly is arranged on the side of the box cover facing the box body. The sampling assembly extends along the first direction and is located between the two rows of electrode terminals of the corresponding battery monomer group. The plurality of busbars are arranged on the side of the box cover facing the box body. The busbar is positioned and connected to the positioning structure. At least part of the busbar is arranged opposite to the through hole. The busbar is electrically connected to the sampling assembly. The busbar is welded to the corresponding electrode terminal. The first direction is perpendicular to the second direction.

[0005] The battery device provided by the embodiment of the application can change the sequence of the assembly production process. In the battery device, the sampling assembly and the busbar are integrated on the box cover to form an upper cover module, so that the upper cover module can be prefabricated, and the prefabrication process of installing the battery monomers into the box body to arrange the battery monomer groups is simultaneously performed. Then, the modules formed by the two prefabrication processes are covered and sealed, so that the assembly production of the battery device is completed. In this way, the production efficiency of the assembly production of the battery device can be improved. Moreover, the process of integrating the sampling assembly and the busbar on the box cover to form the upper cover module and the process of installing the battery monomers into the box body to arrange the battery monomer groups can be independently and simultaneously performed, that is, the two processes do not interfere with each other, so that even if one of the processes fails, the other process will not be affected, and the prefabricated modules in stock can also be used for the assembly production of the battery device, that is, the process of covering and sealing the modules formed by the two prefabrication processes will not be affected, thereby facilitating the continuity and stability of the assembly production process chain of the battery device and facilitating the production efficiency of the battery device. Moreover, the busbar is positioned and connected by the positioning structure, so that the busbar can be quickly and conveniently integrated and connected on the box cover.

[0006] In some embodiments, the battery device includes a plurality of battery monomer groups and a plurality of sampling assemblies, the plurality of battery monomer groups are arranged along a third direction, the plurality of battery monomer groups correspond one-to-one to the plurality of sampling assemblies, the first direction, the second direction, and the third direction are perpendicular to each other, and the plurality of battery monomer groups are connected in series, in parallel, or in a hybrid manner.

[0007] In some embodiments, each battery monomer group corresponds to a plurality of through holes, and the plurality of through holes are arranged opposite to the plurality of electrode terminals one-to-one.

[0008] In some embodiments, each battery monomer group corresponds to a plurality of through holes, and the plurality of through holes are arranged opposite to the plurality of busbars one-to-one.

[0009] In some embodiments, along the second direction, the projection of the through hole is located within the projection of the busbar.

[0010] In some embodiments, the positioning structure comprises at least one buckle, and the busbar is buckled with the buckle. In this way, the connection of the sampling assembly to the box cover can be integrated quickly and conveniently.

[0011] In some embodiments, the positioning structure comprises a plurality of buckles, and the plurality of buckles are distributed at intervals and surround the at least one through hole. In this way, the connection of the sampling assembly to the box cover can be integrated quickly and conveniently.

[0012] In some embodiments, the busbar is adhesively fixed to the box cover; and / or, the sampling assembly is adhesively fixed to the box cover.

[0013] In some embodiments, the battery device further comprises a sealing structure, and the sealing structure seals the through hole. On the one hand, the through hole is sealed by the sealing structure, which can ensure the insulation of the busbar; on the other hand, the sealing structure can prevent dust and sundries from entering the through hole to contact and contaminate the electrode terminal, and can also prevent water vapor from entering the through hole to contact the electrode terminal, thereby preventing the busbar from being affected by the water vapor and causing short circuit damage, and improving the use stability of the busbar.

[0014] In some embodiments, the sealing structure comprises sealing glue accommodated in the through hole; and / or, the sealing structure comprises a plug, which is detachably arranged in the through hole to seal and block the through hole; and / or, the sealing structure comprises a cover piece, which is attached to the side of the box cover away from the box body to cover the sealed through hole.

[0015] In some embodiments, the sealing structure comprises sealing glue accommodated in the through hole, the side of the box cover facing the box body is provided with an annular protrusion surrounding the through hole, and the surface of the side of the busbar facing the box cover is attached to the annular protrusion. In this way, the busbar, the annular protrusion and the through hole form an accommodation space for accommodating glue, and the busbar is attached to the annular protrusion, thereby reducing the possibility of glue entering the interior of the battery device through the through hole and improving the reliability of the battery device.

[0016] In some embodiments, the box cover and the annular protrusion are integrally formed.

[0017] In some embodiments, the box cover is an integrally formed insulating component.

[0018] In some embodiments, the box cover comprises a metal shell and an insulating inner shell arranged in layers, and the busbar and the sampling assembly are both connected to the side of the insulating inner shell away from the metal shell.

[0019] According to a second aspect of the embodiments of the present application, a power consuming device is provided. The power consuming device comprises the battery device as described above. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments. For those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0021] Figure 1 A decomposition diagram of an existing battery device;

[0022] Figure 2 A structural diagram of a battery cell of a battery device of an embodiment of the present application;

[0023] Figure 3 A top view diagram of a battery device of an embodiment of the present application;

[0024] Figure 4 A bottom view diagram of an assembly structure of a box cover, a sampling assembly and a busbar of a battery device of an embodiment of the present application;

[0025] Figure 5 A decomposition diagram of a sampling assembly, a busbar and a box cover of a battery device of an embodiment of the present application;

[0026] Figure 6 A structural diagram of a box cover shown in a bottom view direction; Figure 5 A structural diagram of a box cover shown in a bottom view direction;

[0027] Figure 7 A structural diagram of a box cover shown in a bottom view direction; Figure 6 An enlarged diagram of A in FIG. 6;

[0028] Figure 8 A decomposition diagram of a sampling assembly, a busbar and another box cover of a battery device of an embodiment of the present application;

[0029] Figure 9 A structural diagram of a power utilization device of the present application.

[0030] In the drawings, various reference numerals are used:

[0031] 1000, battery cell group;

[0032] 100, battery cell; 101, main body part; 102, electrode terminal;

[0033] 10, battery box; 11, box body; 12, box cover; 121, through hole; 122, metal shell; 123, insulating inner shell;

[0034] 20, sampling assembly;

[0035] 30, busbar;

[0036] 40, positioning structure; 41, buckle;

[0037] 50, sealing structure;

[0038] 60, annular protrusion;

[0039] 200, battery device;

[0040] 400, electrical equipment; 410, electrical load; 420, control device; 430, vehicle frame; 440, vehicle wheel. DETAILED DESCRIPTION

[0041] Embodiments of the present application are described below in detail with reference to the accompanying drawings, in which the same or similar components or elements having the same or similar functions are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain the present application, and are not to be understood as limiting the present application.

[0042] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0043] In addition, the terms "first", "second", and the like are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0044] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be connected, or detachable, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] At present, from the development of market situation, the application of battery device is more and more extensive. The battery device is not only applied to the energy storage power system of hydropower, thermal power, wind power and solar power station (the battery device of this kind of application is generally called energy storage battery), but also widely applied to electric bicycle, electric motorcycle, electric vehicle and other electric vehicles (the battery device of this kind of application is generally called power battery). With the continuous expansion of the application field of battery device, the market demand is also increasing. Therefore, the expansion of market demand also requires continuous improvement of production capacity, and improving production efficiency is one of the quantitative indicators of improving production capacity.

[0046] In the related art, as shown in Figure 1 At present, the production process mode of assembling and producing battery device 200 is generally: first, install battery monomer 100 into box body 11 of battery box 10 and arrange into battery monomer group, then connect busbar 30 to realize series connection, parallel connection or mixed connection of battery monomer 100, then assemble sampling assembly 20, finally cover battery box 10 with box cover 12 and seal. However, this step-by-step production process can only proceed to the next process after the previous process is completed. Once a problem occurs in the middle process, the whole production process chain will be stalled, which limits the flexibility of the production process and the production efficiency of assembling and producing battery device 200.

[0047] Based on the above considerations, the embodiments of the present application provide a battery device. During the assembly process of the battery device, a sampling assembly and a busbar are integrated on a box cover of a battery box to form an upper cover module, battery monomers are arranged into a battery monomer group by being installed into a box body of the battery box, and then the upper cover module is integrally covered on the box body and the box cover is sealed. The process of integrating the sampling assembly and the busbar on the box cover to form the upper cover module and the process of arranging the battery monomers into the battery monomer group by being installed into the box body can be independently synchronized. Compared with the current production process of the battery device, the battery device provided by the embodiments of the present application can change the order of the assembly process. In the battery device, the sampling assembly and the busbar are integrated on the box cover to form the upper cover module, so that the upper cover module can be prefabricated, and the process of arranging the battery monomers into the battery monomer group by being installed into the box body is simultaneously performed. Then, the modules formed by the two prefabrication processes are covered on each other and sealed, so that the assembly of the battery device is completed. In this way, the production efficiency of the battery device can be improved. Moreover, the process of integrating the sampling assembly and the busbar on the box cover to form the upper cover module and the process of arranging the battery monomers into the battery monomer group by being installed into the box body can be independently synchronized, that is, the two processes do not interfere with each other. Even if one of the processes fails, the other process will not be affected. Moreover, the prefabricated modules in stock can be used to continue the assembly of the battery device, that is, the process of covering the modules formed by the two prefabrication processes on each other and sealing is not affected, so that the continuity and stability of the assembly process chain of the battery device can be maintained, and the production efficiency of the battery device can be ensured.

[0048] In order to illustrate the technical solutions provided by the embodiments of the present application, the following will be described in detail in combination with specific drawings and embodiments.

[0049] As shown in the space rectangular coordinate system shown in Figure 1 and Figure 2 , the positive and negative directions of the X axis represent the first direction X, the positive and negative directions of the Y axis represent the second direction Y, and the positive and negative directions of the Z axis represent the third direction Z.

[0050] According to a first aspect of the embodiments of the present application, the embodiments of the present application provide a battery device. As shown in Figures 2 to 8 , and in combination with Figure 1As shown, the battery device 200 includes at least one battery cell group 1000, a battery box 10, a sampling assembly 20, and a plurality of busbars 30. The battery cell group 1000 includes a plurality of battery cells 100 arranged along a first direction X, the battery cell 100 including a main body 101 and an electrode terminal 102 provided on the main body 101. The battery box 10 includes a box body 11 and a box cover 12, the box body 11 and the box cover 12 being covered with each other along a second direction Y, and the plurality of battery cells 100 being accommodated in the battery box 10 to be arranged to form at least one battery cell group 1000 extending along the first direction X, the electrode terminal 102 of the battery cell 100 being opposite to the box cover 12. Further, the box cover 12 is provided with a through hole 121, the sampling assembly 20 is provided on a side of the box cover 12 facing the box body 11, the sampling assembly 20 extends along the first direction X and is located between two rows of electrode terminals 102 of the corresponding battery cell group 1000. The plurality of busbars 30 are provided on the side of the box cover 12 facing the box body 11, the busbar 30 is electrically connected with the sampling assembly 20, and at least part of the busbar 30 is arranged opposite to the through hole 121, and the busbar 30 is welded with the corresponding electrode terminal 102. That is, in the battery device 200, the sampling assembly 20 and the busbar 30 are integrated on the box cover 12, and then the box cover 12 is covered on the box body 11, so that the busbar 30 is in contact with the electrode terminal 102 of the corresponding battery cell 100, and then the busbar 30 is welded with the electrode terminal 102 by extending into a welding device from the through hole 121 to realize electrical connection. The first direction X is perpendicular to the second direction Y.

[0051] In the embodiments of the present application, the battery cell 100 can be a secondary battery, which refers to a battery cell 100 that can be activated by charging after discharging. The battery cell 100 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 embodiments of the present application are not limited thereto.

[0052] The battery device 200 provided by the embodiment of the present application can change the sequence of the assembly production process. In the battery device 200, since the sampling assembly 20 and the busbar 30 are integrated on the box cover 12 to form the upper cover module, the upper cover module can be prefabricated and produced, and the prefabrication process of installing the battery monomer 100 into the box body 11 to arrange the battery monomer group 1000 is simultaneously performed. Then, the two prefabrication processes are combined and sealed to complete the assembly production of the battery device. In this way, the production efficiency of the battery device 200 can be improved. Moreover, since the process of integrating the sampling assembly 20 and the busbar 30 on the box cover 12 to form the upper cover module and the process of installing the battery monomer 100 into the box body 11 to arrange the battery monomer group 1000 can be independently and simultaneously performed, that is, the two processes do not interfere with each other, and even if one of the processes fails, the other process will not be affected. Moreover, the prefabricated modules in stock can also be used to continue the assembly production of the battery device 200, that is, the process of combining the two prefabrication processes to form the module and sealing the module will not be affected, thereby facilitating the continuity and stability of the assembly production process chain of the battery device 200 and ensuring the production efficiency of the battery device 200.

[0053] The sampling assembly 20 is responsible for collecting the voltage, current, temperature and other state quantities of the battery monomer 100 in real time and sending them to the control unit, that is, voltage sampling, current sampling, temperature sampling and the like, which is the basis for the functions of the battery management system (BMS), such as overcharge, overdischarge, equalization and thermal management. The entire assembly is usually packaged in a CCS (Cells Contact System) integrated busbar.

[0054] In some embodiments, only one through hole 121 is provided on the box cover 12, and the battery device 200 only includes one battery cell group 1000. In this embodiment, the two ends of the sampling assembly 20 are respectively fixed on the two side edges of the through hole 121 along the first direction X, and the through hole 121 is fixed with the busbar 30 on the two side edges along the third direction Z, so that the sampling assembly 20 and the busbar 30 are integrated and installed on the box cover 12. Wherein, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0055] In combination Figure 1 As shown in some battery devices 200, the battery device 200 includes a plurality of battery cell groups 1000 and a plurality of sampling assemblies 20, that is, a plurality of battery cells 100 are arranged to form a plurality of battery cell groups 1000 in the box body 11, and the plurality of battery cell groups 1000 are arranged along the third direction Z, and the plurality of battery cell groups 1000 correspond to the plurality of sampling assemblies 20 one by one. The plurality of battery cell groups 1000 are electrically connected by the busbar 30 to form a series, parallel or mixed connection. The following is described by taking the battery device 200 including a plurality of battery cell groups 1000 as an example.

[0056] In some embodiments, each battery cell group 1000 corresponds to one through hole 121, that is, the number of through holes 121 is equal to the number of battery cell groups 1000. In this embodiment, one through hole 121 corresponds to one sampling assembly 20, and the two ends of the sampling assembly 20 are respectively fixed on the two side edges of the corresponding through hole 121 along the first direction X, and the through hole 121 is fixed with the busbar 30 on the two side edges along the third direction Z, so that the sampling assembly 20 and the busbar 30 are integrated and installed on the box cover 12.

[0057] In some embodiments, each battery cell group 1000 corresponds to a plurality of through holes 121, and the plurality of through holes 121 are arranged at intervals along the first direction X. In this embodiment, the two ends of the sampling assembly 20 corresponding to each battery cell group 1000 are connected on the edges of the through holes 121 located at both ends along the first direction X, and at least one position between the two ends of the sampling assembly 20 is connected to the interval position between the two connected through holes 121. And each through hole 121 is fixed with the busbar 30 on the two side edges along the third direction Z. So that the sampling assembly 20 and the busbar 30 are integrated and installed on the box cover 12.

[0058] As Figure 5 And Figure 8As shown, in some embodiments, each battery cell group 1000 corresponds to multiple through holes 121, and the multiple through holes 121 are arranged one-to-one with multiple electrode terminals 102. In this embodiment, the sampling components 20 corresponding to each battery cell group 1000 are all connected to the side of the cover 12 facing the housing 11, and each busbar 30 is also connected to the side of the cover 12 facing the housing 11, so that the sampling components 20 and the busbars 30 are integrated and mounted on the cover 12. Furthermore, in this embodiment, along the second direction Y, the projection of the through hole 121 is located within the projection of the busbar 30.

[0059] In some embodiments, each battery cell group 1000 corresponds to multiple through holes 121, and each through hole 121 is correspondingly arranged with multiple busbars 30. In this embodiment, the sampling components 20 corresponding to each battery cell group 1000 are all connected to the side of the cover 12 facing the housing 11, and each busbar 30 is also connected to the side of the cover 12 facing the housing 11. In one possible connection method, the circumferential edge of the side of the busbar 30 facing the cover 12 is connected to the circumferential edge of the through hole 121. In this case, the projection of the through hole 121 along the second direction Y is located within the projection of the busbar 30; or, in another possible connection method, the busbar 30 is embedded in the through hole 121. In this case, the projection of the through hole 121 along the second direction Y coincides with the projection of the busbar 30. Furthermore, in this embodiment, each through hole 121 corresponds to two electrode terminals 102.

[0060] like Figure 6 and Figure 7 As shown, in some embodiments, the lid 12 has multiple positioning structures 40 on the side facing the box body 11, and the busbar 30 is positioned and connected to the positioning structures 40. The busbar 30 can be fixedly connected to the positioning structures 40, or it can be detachably connected to the positioning structures 40, thereby integrating the busbar 30 onto the lid 12. Thus, by positioning and connecting the busbar 30 through the positioning structures 40, it can be quickly and conveniently integrated onto the lid 12.

[0061] In some embodiments, the positioning structure 40 includes at least one snap fastener 41, and the busbar 30 snaps into the snap fastener 41. In some feasible embodiments, when the positioning structure 40 may consist of only one snap fastener 41, the busbar 30 has a snap hole adapted to the snap fastener 41, and the snap fastener 41 passes through the snap hole, thereby positioning the busbar 30 onto the cover 12. In other feasible embodiments, such as... Figure 7As shown, the positioning structure 40 may include multiple snap fasteners 41, which are spaced apart and surround at least one through hole 121. When the manifold 30 is connected to the multiple snap fasteners 41, the multiple snap fasteners 41 are engaged around the circumferential edge of the manifold 30. This allows for quick and convenient integration and connection to the cover 12.

[0062] In some embodiments, the busbar 30 can be adhesively fixed to the cover 12, which is a simple and efficient connection method. In this embodiment, the busbar 30 can also be installed and positioned by the positioning structure 40, thereby quickly and accurately determining the assembly position of the busbar 30 and improving connection efficiency.

[0063] In some embodiments, the sampling component 20 is adhesively fixed to the box cover 12, thereby quickly and conveniently integrating the sampling component 20 onto the box cover 12.

[0064] In the embodiments of this application, both the manifold 30 and the sampling component 20 are bonded and fixed to the box cover 12.

[0065] like Figure 3 As shown, in some embodiments, the battery device 200 further includes a sealing structure 50 that seals the through hole 121. After the busbar 30 and electrode terminal 102 are electrically connected by welding through the through hole 121 using welding equipment, the sealing structure 50 seals the through hole 121 and is insulated from the busbar 30. On the one hand, sealing the through hole 121 with the sealing structure 50 ensures the insulation of the busbar 30; on the other hand, the sealing structure 50 prevents dust and debris from entering through the through hole 121 and contaminating the electrode terminal 102, and also prevents moisture from entering through the through hole 121 and contacting the electrode terminal 102, thus preventing the busbar 30 from being damaged by moisture and causing a short circuit, and improving the operational stability of the busbar 30.

[0066] In some embodiments, the sealing structure 50 includes a sealant contained within the through-hole 121. That is, after the busbar 30 is electrically connected to the electrode terminal 102 by welding through-hole 121 using welding equipment, the sealant is applied to the through-hole 121 to fill it. Thus, after the sealant cures, the through-hole 121 is sealed by the insulating sealant.

[0067] In some embodiments, the sealing structure 50 includes a plug block that is detachably disposed in the through hole 121 to seal the through hole 121. After the busbar 30 and the electrode terminal 102 are welded together by inserting a welding device into the through hole 121 to achieve electrical connection, the plug block is directly inserted into the through hole 121, and the elastic deformation of the plug block is used to achieve a sealing effect on the through hole 121.

[0068] In some embodiments, the sealing structure 50 comprises a cover, such as an insulation film layer, which is attached to the side of the cover 12 facing away from the box 11 to cover the sealing through hole 121.

[0069] In the embodiments of the present application, the sealing structure 50 can also comprise at least two of the sealing glue, the plug, and the cover. For example, the sealing glue and the plug are used to seal the through hole 121 simultaneously; for another example, the sealing glue and the cover are used to seal the through hole 121 in combination; or for another example, the plug and the cover are used to seal the through hole 121 in combination.

[0070] In some embodiments, when the sealing structure 50 only comprises the sealing glue contained in the through hole 121, in order to reduce the possibility that the glue entering the through hole 121 penetrates into the inside of the battery device 200, therefore, as shown in Figure 6 and Figure 7 The side of the cover 12 facing towards the box 11 is provided with an annular protrusion 60 surrounding the through hole 121, and the surface of the busbar 30 facing towards the cover 12 is attached to the annular protrusion 60. In this way, the busbar 30, the annular protrusion 60, and the through hole 121 form a containing space for containing the glue, and the busbar 30 is attached to the annular protrusion 60, thereby reducing the possibility that the glue entering the through hole 121 penetrates into the inside of the battery device 200, and improving the reliability of the battery device 200.

[0071] In some embodiments, the cover 12 and the annular protrusion 60 can be integrally formed. Alternatively, in other embodiments, the annular protrusion 60 can also be detachably arranged on the cover 12, for example, the annular protrusion 60 is a sealing ring clamped between the annular protrusion 60 and the cover 12.

[0072] In some embodiments, the cover 12 is an integrally formed insulation component. In the present embodiment, the cover 12 is a component formed by using an insulation material, i.e., the cover 12 is entirely supported by the insulation material.

[0073] As shown in Figure 8 In some embodiments, the cover 12 comprises a metal outer shell 122 and an insulation inner shell 123 arranged in a stack, i.e., the cover 12 of the present embodiment is a double-layer composite formed component. The busbar 30 and the sampling assembly 20 are both connected to the side of the insulation inner shell 123 facing away from the metal outer shell 122, so that the insulation arrangement between the busbar 30 and the metal outer shell 122 and between the sampling assembly 20 and the metal outer shell 122 is achieved.

[0074] According to a second aspect of the embodiments of the present application, the embodiments of the present application also provide a power utilization device 400, which comprises a power utilization load 410.

[0075] The electric device 400 includes, but is not limited to, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship, a spacecraft, etc. The electric toy can include, but is not limited to, a stationary or mobile electric toy, such as a game machine, an electric automobile toy, an electric ship toy, an electric aircraft toy, etc. The spacecraft can include, but is not limited to, an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0076] In the embodiments of the present application, the electric device 400 further includes the battery device 200 as described above, i.e., the electric device 400 uses a plurality of battery devices 200 in series, in parallel or in a mixed manner, or the electric device uses only one battery device 200, and the electric load 410 is electrically connected to the battery device 200. The battery device 200 is used to store electric energy, or the battery device 200 is used to provide electric energy to the electric load 410, so that the electric load 410 can operate normally.

[0077] In the embodiments of the present application, the electric device 400 is an electric automobile, and the battery device 200 is assembled as shown in Figure 9 The battery device 200 is mounted on the frame 430 of the electric automobile. The electric automobile includes the frame 430, a driving motor and wheels 440, the battery device 200 and the driving motor are fixedly mounted on the frame 430, the wheels 440 are rotatably connected to the frame 430, and the battery device 200 is electrically connected to the driving motor, and the driving motor is drivingly connected to the wheels 440. The battery device 200 provided by the present application is used to supply power to the driving motor (the driving motor is one of the electric loads 410 of the electric device 400), so that the driving motor drives the wheels 440 to rotate, so that the electric automobile can run normally. In addition, the electric automobile includes a control device 420, the control device 420 is mounted on the 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 charging and discharging state of the battery device 200. In some electric automobiles, the battery box of the battery device 200 can be part of the chassis structure of the electric automobile. For example, part of the battery box can be at least part of the floor of the electric automobile, or part of the battery box can be at least part of the cross beam and longitudinal beam of the electric automobile.

[0078] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement 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, include: At least one battery cell group, the battery cell group comprising a plurality of battery cells arranged along a first direction, the battery cell comprising a body portion and an electrode terminal disposed on the body portion; A battery box includes a box body and a box cover, the box body and the box cover are closed to each other along a second direction, a plurality of battery cells are housed in the battery box, the electrode terminals are opposite to the box cover, the box cover is provided with through holes, and the box cover is provided with a plurality of positioning structures on the side facing the box body; A sampling component is disposed on the side of the box cover facing the box body, and the sampling component extends along the first direction and is located between the two rows of electrode terminals of the corresponding battery cell group; Multiple busbars are disposed on the side of the box cover facing the box body. The busbars are positioned and connected to the positioning structure. At least a portion of the busbars is disposed opposite to the through hole. The busbars are electrically connected to the sampling component. The busbars are welded to their corresponding electrode terminals. Wherein, the first direction is perpendicular to the second direction.

2. The battery device according to claim 1, characterized in that, The battery device includes multiple battery cell groups and multiple sampling components. The multiple battery cell groups are arranged along a third direction, and each of the multiple battery cell groups corresponds to one of the multiple sampling components. The first direction and the second direction are perpendicular to each other with respect to the third direction. The multiple battery cell groups are connected in series, parallel or mixed. Each group of battery cell groups corresponds to at least one through hole.

3. The battery device according to claim 1 or 2, characterized in that, Each group of battery cells corresponds to multiple through holes; The multiple through holes are arranged one-to-one with the multiple electrode terminals; or, the multiple through holes are arranged one-to-one with the multiple busbars.

4. The battery device according to claim 3, characterized in that, Along the second direction, the projection of the through hole lies within the projection of the manifold.

5. The battery device according to claim 1 or 2, characterized in that, The positioning structure includes at least one snap fastener, and the busbar engages with the snap fastener.

6. The battery device according to claim 1 or 2, characterized in that, The positioning structure includes multiple snap fasteners, which are spaced apart and surround at least one through hole.

7. The battery device according to claim 1 or 2, characterized in that, The manifold is bonded and fixed to the box cover; And / or, the sampling component is bonded and fixed to the box cover.

8. The battery device according to claim 1 or 2, characterized in that, The battery device also includes a sealing structure that seals the through hole.

9. The battery device according to claim 8, characterized in that, The sealing structure includes a sealant contained within the through hole; And / or, the sealing structure includes a plug block, which is detachably disposed within the through hole to seal the through hole; And / or, the sealing structure includes a cover attached to the side of the lid opposite to the box body to cover and seal the through hole.

10. The battery device according to claim 8, characterized in that, The sealing structure includes sealant contained in the through hole, and the side of the box cover facing the box body has an annular protrusion that surrounds the through hole. The surface of the manifold facing the box cover is attached to the annular protrusion.

11. The battery device according to claim 10, characterized in that, The lid and the annular protrusion are integrally formed.

12. The battery device according to claim 1 or 2, characterized in that, The box cover is an integrally molded insulating component; Alternatively, the cover may include a stacked metal outer shell and an insulating inner shell, with the busbar and the sampling assembly both connected to the side of the insulating inner shell away from the metal outer shell.

13. An electrical appliance, characterized in that, The electrical equipment includes a battery device as described in any one of claims 1-12.

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