Battery device, electric device, and energy storage device

Abstract

The application provides a battery device, a power utilization device and an energy storage device, and belongs to the technical field of batteries. The battery device comprises a shell, a current collection assembly, a sampling assembly and a plurality of battery monomers. The shell comprises a box body and a cover body. The box body contains the plurality of battery monomers, and the cover body is arranged on the opening of the box body. The current collection assembly is electrically connected with the plurality of battery monomers, and the current collection assembly has a first clamping part. The first clamping part comprises at least one protrusion. The sampling assembly is connected to the inner side of the cover body facing the box body, and the sampling assembly has a second clamping part. The second clamping part comprises at least one clamping groove corresponding to the at least one protrusion. The clamping groove comprises a through groove with a first opening at both ends along the maximum expansion direction of the battery monomer. The second clamping part is used for clamping connection with the first clamping part when the cover body and the box body are closed. The application can quickly realize the disassembly of the sampling assembly and the current collection assembly. The through groove can also avoid pulling the sampling assembly when the battery monomer expands.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device, a power utilization device and an energy storage device. BACKGROUND

[0002] Energy saving and emission reduction is the key to the sustainable development of society. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] In the related art, a battery realizes power and signal transmission through a CCS (Cell Contacting System). The CCS includes a busbar and a flexible printed circuit (FPC) welded to the busbar. However, when the flexible printed circuit has a problem such as folding, it is difficult to detach from the busbar, which can easily lead to the entire battery being scrapped. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the background art. To this end, one object of the present application is to provide a battery device, a power utilization device and an energy storage device to improve the problem that the flexible printed circuit is difficult to detach from the busbar.

[0005] Embodiments of the first aspect of the present application provide a battery device, comprising: a plurality of battery monomers, a housing, a busbar assembly and a sampling assembly; the housing comprises a box body and a cover body, the box body contains a plurality of battery monomers, and the cover body is provided on the opening of the box body; the busbar assembly is electrically connected with the plurality of battery monomers, and the busbar assembly has a first clamping portion, the first clamping portion comprises at least one protrusion; the sampling assembly is connected to the inner side of the cover body facing the box body, and the sampling assembly has a second clamping portion, the second clamping portion comprises at least one clamping groove corresponding to the at least one protrusion, the clamping groove comprises a through slot with a first opening at both ends in the maximum expansion direction of the battery monomer, and the second clamping portion is used for clamping connection with the first clamping portion when the cover body and the box body are closed, so as to realize the electrical connection between the sampling assembly and the busbar assembly through the electrical connection between the first clamping portion and the second clamping portion.

[0006] The sampling assembly is installed on the cover body. When the cover body is combined with the box body, the sampling assembly can be installed and electrically connected with the busbar assembly through the clamping of the first clamping part and the second clamping part, without the need to install an additional insulating sheet, thereby simplifying the assembly process, reducing the cost, and improving the energy density of the battery device without the need to reserve an assembly space. When the fuse of the sampling assembly is blown or the sampling assembly is damaged, the sampling assembly and the busbar assembly can be quickly and conveniently disassembled by disconnecting the clamping of the first clamping part and the second clamping part, without the need to scrap the entire battery device. The clamping of the busbar assembly and the sampling assembly is achieved through the clamping of the clamping groove and the protrusion, which is simple in structure and easy to implement. When the battery monomer is expanded, the protrusion on the busbar assembly can move relative to the clamping groove, thereby avoiding pulling the sampling assembly, and the stable electrical connection between the sampling assembly and the busbar assembly can be achieved. In some embodiments, the inner side of the cover body is provided with a first connecting part, the sampling assembly is provided with a first matching part, and the first connecting part is in positioning connection with the first matching part. The cover body is further provided with a second connecting part, the busbar assembly is provided with a second matching part, and the second connecting part is in positioning connection with the second matching part.

[0007] In the embodiment, the first connecting part and the first matching part can achieve the positioning connection of the cover body and the sampling assembly, and the second connecting part and the second matching part can achieve the positioning connection of the cover body and the busbar assembly. After the cover body is assembled with the box body, the sampling assembly and the busbar assembly can be accurately positioned, i.e., the clamping connection of the first clamping part and the second clamping part can be accurately achieved, which is beneficial to improving the accuracy and reliability of the connection between the sampling assembly and the busbar assembly. In addition, the cover body can be used to achieve the accurate positioning between the sampling assembly and the busbar assembly, and the components involved are less and the positioning accuracy is higher.

[0008] In some embodiments, the first connecting part includes at least one first connecting hole, the first matching part includes at least one first matching hole, the first connecting hole is detachably connected with the first matching hole through a first fastener, the second connecting part is arranged at the edge of the cover body and includes at least one second connecting hole, and the second matching part is arranged at the edge of the busbar assembly and includes at least one second matching hole. A second fastener can pass through the second connecting hole and the second matching hole and be detachably connected with the box body.

[0009] In the embodiment, the first fastener and the first connecting hole and the first matching hole can achieve the disassembly of the sampling assembly and the cover body. When the sampling assembly has a problem, it can be conveniently replaced without scrapping the entire battery device, thereby reducing the production loss and achieving the installation and positioning of the sampling assembly and the cover body.

[0010] In some embodiments, the sampling assembly comprises a sampling body extending along a first direction, and a first conductive member connected to two ends of the sampling body along a second direction, the second clamping portion is arranged on the first conductive member, and the first matching portion is arranged on the sampling body and the first conductive member; wherein the first direction is arranged perpendicularly to the second direction.

[0011] In the embodiment, by arranging the first conductive member on the edge of the sampling body, and arranging the first matching portion and the second clamping portion on the first conductive member, the positioning error between the second clamping portion and the cover body can be further reduced, thereby reducing the positioning error between the first clamping portion and the second clamping portion, and improving the clamping accuracy. In addition, the electrical connection between the sampling assembly and the bus assembly can be directly realized through the clamping of the first clamping portion and the second clamping portion.

[0012] In some embodiments, the part of the sampling body around the first conductive member is provided with a first hollow part penetrating the sampling body.

[0013] In the embodiment, the first hollow part can form a gap and a hole on the sampling body, thereby reducing the rigidity of the part and improving the deformation ability. When the battery monomer expands, the first hollow part can deform to adapt to avoid pulling the sampling body and causing damage to the sampling body.

[0014] In some embodiments, the clamping groove comprises a first segment and a second segment connected in sequence along the depth direction of the clamping groove, and the groove bottom of the clamping groove is located in the second segment; the cross section perpendicular to the depth direction of the clamping groove is a cross section, the first segment is used for clamping the protrusion, the cross section area of the second segment is larger than that of the first segment, and the cross section area of the second segment gradually increases from one end close to the first segment to one end away from the first segment.

[0015] In the embodiment, by arranging the first segment and the second segment connected thereto, the first segment can realize the close connection of the protrusion and the clamping groove, and the second segment can apply pressure to the first segment to improve the reliability of the clamping.

[0016] In some embodiments, the inner side of the cover body is provided with a first accommodating groove, and the first accommodating groove is used for accommodating at least part of the clamping groove.

[0017] In the embodiment, by arranging the first accommodating groove on the inner side of the cover body, at least part of the clamping groove protruding from the sampling body can be located in the first accommodating groove, thereby effectively improving the space utilization of the battery device and improving its energy density.

[0018] In some embodiments, the bus assembly comprises an insulating portion and a conductive portion connected to the insulating portion, the conductive portion is electrically connected to a plurality of battery monomers, and the first clamping portion is arranged on the edge of the conductive portion.

[0019] In the embodiment, the current collecting assembly can realize the current collecting function by setting the conductive part and the insulating part, and is convenient to connect with the box body and the cover body, and helps to realize the installation and positioning. The first clamping part is arranged on the conductive part, and can realize the electrical connection between the sampling assembly and the conductive part while realizing the clamping connection, and has a simple structure.

[0020] In some embodiments, the insulating part and the conductive part are processed into an integral piece through an integral molding process, or the insulating part is an insulating film for mounting the conductive part.

[0021] The above two methods can realize the processing and molding of the current collecting assembly, and can realize the connection with the sampling assembly through the clamping connection, and the processing method is simple and reliable.

[0022] In some embodiments, the conductive part includes a plurality of second conductive pieces, the second conductive pieces are welded with the electrode terminals of the battery monomers, and the insulating part between the adjacent two second conductive pieces is provided with a second hollow part penetrating through the insulating part.

[0023] In the embodiment, the second hollow part can form a gap and a hole on the insulating part, so as to reduce the rigidity of the part and improve the deformation ability. When the battery monomer expands, the second hollow part can deform to adapt to avoid pulling the current collecting assembly and causing damage to the current collecting assembly.

[0024] In some embodiments, the surface of the insulating part facing the cover body is provided with a second accommodating groove, and the second accommodating groove is used to accommodate at least part of the sampling assembly.

[0025] In the embodiment, the second accommodating groove is arranged on the insulating part to provide installation space for the sampling assembly, thereby compressing the volume of the battery device and improving the energy density. At the same time, the thickness of the insulating part can be reduced, and the weight of the insulating part can be reduced while insulating, and the energy density can be improved.

[0026] In some embodiments, the sampling assembly includes a support and a temperature sensor connected to the support, and the current collecting assembly is provided with a temperature measuring opening corresponding to the temperature sensor, and the temperature measuring opening is used to allow the temperature sensor to be connected with a temperature measuring point of the battery monomer.

[0027] In the embodiment, the support can accurately install the temperature sensor and has moderate pressure, which is conducive to the accuracy of temperature measurement, and the temperature measuring opening can realize heat transfer between the temperature sensor and the temperature measuring point, which is convenient for detecting the temperature of the battery monomer.

[0028] In some embodiments, the sampling assembly includes a connector arranged at one end of the sampling assembly, and the box body is provided with a BMS, and the BMS includes a connector base, and the connector is used to be plugged with the connector base when the cover body is closed with the box body.

[0029] The embodiment sets the connector base on the BMS, sets the connector plugged with the connector base in the sampling assembly, realizes the connection between the sampling assembly and the BMS when the cover is closed, so as to facilitate the transmission of the signal, and can simplify the assembly steps and improve the assembly efficiency.

[0030] In some embodiments, the bus assembly has an output part for outputting current, the box is provided with a total output part, the output part is provided with a first through hole, the total output part is provided with a second through hole, and the box is further provided with an output part base, and the threaded connecting piece passes through the first through hole and the second through hole and is screwed with the output part base.

[0031] The embodiment realizes the mechanical firmness and low contact resistance of large current output through the connection between the total output part and the output part. Compared with the way of welding the FPC to the bus bar in the related art, the connection between the bus assembly and the total output part can be realized between the sampling assembly installations, and the connection is stable and reliable.

[0032] The embodiment of the second aspect of the application provides a power utilization device, which comprises the battery device in the above-mentioned embodiments, and the battery device is used for providing electric energy.

[0033] The embodiment of the third aspect of the application provides an energy storage device, which comprises the battery device in the above-mentioned embodiments, and the energy storage device is used for storing electric energy.

[0034] The above description is only a summary of the technical solutions of the application. In order to enable the technical means of the application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the application to be more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0035] In the drawings, identical reference numerals designate identical or similar parts throughout the several views. The drawings are not necessarily to scale. It should be understood that the drawings only depict some embodiments in accordance with the disclosure and should not be considered as limiting the scope of the disclosure.

[0036] Figure 1 A structural schematic diagram of a vehicle of some embodiments of the application;

[0037] Figure 2 An exploded structural schematic diagram of a battery device of some embodiments of the application;

[0038] Figure 3 An exploded structural schematic diagram of a battery monomer of some embodiments of the application;

[0039] Figure 4 A structural schematic diagram of a vehicle of some embodiments of the application; Figure 2A close-up view of the middle A;

[0040] Figure 5 A close-up view of the middle A; Figure 2 A close-up view of the middle A;

[0041] Figure 6 A close-up view of the middle A; Figure 2 A close-up view of the middle A;

[0042] Figure 7 A close-up view of the middle A; Figure 6 A close-up view of the middle A;

[0043] Figure 8 A close-up view of the middle A;

[0044] Figure 9 A close-up view of the middle A; Figure 2 A close-up view of the middle A;

[0045] Figure 10 A close-up view of the middle A;

[0046] Figure 11 A close-up view of the middle A; Figure 10 A close-up view of the middle A;

[0047] Figure 12 A close-up view of the middle A; Figure 6 A close-up view of the middle A;

[0048] Figure 13 A close-up view of the middle A; Figure 2 A close-up view of the middle A;

[0049] Figure 14 A close-up view of the middle A; Figure 5 A close-up view of the middle A.

[0050] Explanation of reference numerals:

[0051] Vehicle 1000;

[0052] Battery device 100, controller 200, motor 300;

[0053] Battery cell 11, end cover 12, housing 13, electrode assembly 14, electrode terminal 15;

[0054] Busbar assembly 400, first engaging portion 410, protrusion 411, insulating portion 420, second hollow portion 421, second receiving groove 422, conductive portion 430, second conductive member 431, temperature measurement opening 440, output portion 450, first through hole 451;

[0055] Sampling assembly 500, second clamping portion 510, clamping groove 511, first section 5111, second section 5112, sampling body 520, first hollow part 521, first conductive part 530, extension part 531, temperature sensor 540, support part 550, connector 560;

[0056] BMS 600, connector base 610;

[0057] First connecting portion 710, first connecting hole 711, first matching portion 720, first matching hole 721, second connecting portion 730, second connecting hole 731, second matching portion 740, second matching hole 741, first fastener 750, second fastener 760;

[0058] Housing 20, box body 21, cover body 22, first accommodating groove 23, total output portion 24, output portion base 25, threaded connecting part 26, second through hole 27. DETAILED DESCRIPTION

[0059] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "comprising" and "having", and any variations thereof, as used in the specification and claims and the aforementioned description of the drawings, are intended to cover not exclusively inclusive.

[0061] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0062] In this paper, the "embodiment" means that the specific features, structures or properties described in conjunction with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0063] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, a and / or b, which can represent the three cases of a alone, a and b together, and b alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0064] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0065] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0066] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be 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 embodiments of the present application can be understood according to the specific circumstances.

[0067] At present, from the development of market situation, the application of rechargeable battery is more and more widely. Rechargeable batteries are not only used in energy storage power systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in various electronic equipment, such as electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment and aerospace and many other fields. With the continuous expansion of the application field of rechargeable batteries, the market demand is also increasing.

[0068] In the related art, the battery realizes power and signal transmission through the CCS, and the CCS includes a busbar and a flexible circuit board welded to the busbar. During installation, the CCS needs to be welded on the battery cell in the battery box first, then an insulating sheet is pasted on the CCS, and finally the upper cover is installed. However, this scheme is complex and requires additional insulating sheet materials.

[0069] And, in the related art, in order to avoid the CCS being squeezed due to assembly tolerances and the like when the upper cover is installed, an assembly space is usually reserved between the upper cover and the CCS, resulting in a thick upper cover and a low energy density of the battery.

[0070] In addition, the FPC in the CCS is directly welded with the busbar as a whole, and when the FPC fuse is abnormally fused or the FPC is damaged during production, it is difficult to separately detach the FPC from the busbar, and therefore the entire battery often needs to be scrapped.

[0071] And, in the related art, in order to cope with the swelling of the battery cell, the FPC substrate needs to be designed with an anti-swelling structure, resulting in an increase in the width of the FPC, affecting the design space of the busbar and the low layout rate of the FPC substrate.

[0072] In order to improve at least one of the above problems, the present application provides a battery device, a power utilization device and an energy storage device, wherein the battery device comprises: a plurality of battery cells, a housing, a busbar assembly and a sampling assembly; the housing comprises a box body and a cover body, the box body contains the plurality of battery cells, and the cover body is provided on the opening of the box body; the busbar assembly is electrically connected with the plurality of battery cells, and the busbar assembly has a first clamping portion comprising at least one protrusion; the sampling assembly is connected to the inner side of the cover body facing the box body, and the sampling assembly has a second clamping portion comprising at least one clamping groove corresponding to the at least one protrusion, the clamping groove comprises a through slot having a first opening at both ends in the maximum swelling direction of the battery cell, and the second clamping portion is used for clamping connection with the first clamping portion when the cover body and the box body are closed, so as to realize the electrical connection between the sampling assembly and the busbar assembly through the electrical connection of the first clamping portion and the second clamping portion. In the embodiment, the sampling assembly is installed on the cover body, and when the cover body and the box body are closed, the sampling assembly can be installed and electrically connected with the busbar assembly through the clamping of the first clamping portion and the second clamping portion, without the need for installing an additional insulating sheet, thereby simplifying the assembly process, reducing the cost, improving the energy density of the battery device without the need for reserving an assembly space, and when the fuse of the sampling assembly is fused or the sampling assembly is damaged, the sampling assembly and the busbar assembly can be quickly and conveniently detached by disconnecting the clamping of the first clamping portion and the second clamping portion, without the need for scrapping the entire battery device, and the through slot can allow the protrusion to move relative to the clamping groove when the battery cell swells, thereby avoiding pulling the sampling assembly.

[0073] The technical solutions described in the embodiments of the present application are applicable to a battery device, a power utilization device using the battery device and an energy storage device.

[0074] The battery device as a power source in the embodiments of the present application includes one or more battery clusters to improve the voltage and capacity of the energy storage device. The battery cluster can include a plurality of battery devices connected in series through a busbar component to improve the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the energy storage device.

[0075] The energy storage device can be used in energy storage power stations, wind power systems, solar power systems, mobile power systems, or temporary power supply systems, etc. The energy storage device can store electrical energy as needed and output electrical energy at the appropriate time. For example, the energy storage device can store electrical energy during the low electricity consumption valley, and provide electrical energy for related users or electrical devices during the electricity consumption peak. The energy storage system provided in the embodiments of the present application can be any power system that needs to use an energy storage device. As an example, the energy storage device is an energy storage container or an energy storage cabinet.

[0076] The electrical device using the battery device as a power source in the embodiments of the present application can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, a ship, a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0077] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the above-described energy storage device and electrical device. For the sake of simplicity, the following embodiments are described with the electrical device as a vehicle as an example.

[0078] Please refer to Figure 1 , Figure 1 The structural schematic diagram of the vehicle provided in some embodiments of the present application is shown. The vehicle 1000 can be a fuel car, a gas car, or a new energy car, which can be a pure electric car, a hybrid car, or a range extended car, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0079] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0080] Please refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device provided in some embodiments of this application.

[0081] The battery device 100 mentioned in the embodiments of this application may include a housing 20 and a plurality of battery cells 11, wherein the battery cells 11 are housed in the housing 20 and are used to provide voltage and capacity. The housing 20 may be a simple three-dimensional structure such as a single cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres. The material of the housing 20 may be an alloy material such as aluminum alloy or iron alloy, or a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

[0082] As an example, the housing 20 may include a casing 21 and a cover 22. The casing 21 and the cover 22 are closed together, forming a closed space inside the housing 20 to house the battery cell 11. Here, "closed" refers to covering or closing, and can be either non-sealed or sealed, to prevent liquids or other foreign objects from affecting the charging or discharging of the battery cell 11. The cover 22 may be a top cover.

[0083] In some embodiments, the housing 20 may be part of the vehicle's chassis structure. For example, a portion of the housing 20 may be at least a portion of the vehicle's floor, or a portion of the housing 20 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0084] The housing 20 may contain a busbar assembly 400 and a sampling assembly 500. Multiple battery cells 11 are connected in series, parallel or mixed through the busbar assembly 400. The sampling assembly 500 is electrically connected to the busbar assembly 400 and is used to collect signals such as temperature and voltage of the battery cells 11.

[0085] In some embodiments, such as Figure 2 As shown, the battery device 100 can be a battery pack, and the housing 20 can be the battery pack housing.

[0086] In addition, multiple battery cells 11 can also form multiple battery modules, and multiple battery modules can be housed in the casing 20.

[0087] As an example, the battery device 100 can also be a battery module, which is formed by arranging and fixing a plurality of battery cells 11 into one independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 11 by a cable tie, and the housing 20 can be a battery module housing.

[0088] The battery cell 11 provided by the embodiments of the present application can be a secondary battery, which refers to a battery cell 11 that can be activated by charging after discharging.

[0089] The battery cell 11 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.

[0090] Please refer to Figure 3 , Figure 3 The exploded structural diagram of the battery cell provided by some embodiments of the present application is shown. The battery cell 11 refers to the smallest unit that constitutes a battery. As Figure 3 , the battery cell 11 includes an end cover 12, a shell 13, an electrode assembly 14, an electrode terminal 15, and other functional components.

[0091] The end cover 12 refers to a component that covers the opening of the shell 13 to isolate the internal environment of the battery cell 11 from the external environment. Without limitation, the shape of the end cover 12 can be adapted to the shape of the shell 13 to fit the shell 13. In some embodiments, the end cover 12 can be made of a material with certain hardness and strength (such as aluminum alloy), so that the end cover 12 is not easily deformed when subjected to extrusion and collision, so that the battery cell 11 can have higher structural strength, and the safety performance can also be improved. The end cover 12 can be provided with the electrode terminal 15 and other functional components. The electrode terminal 15 can be used to electrically connect with the electrode assembly 14 for outputting or inputting the electrical energy of the battery cell 11. In some embodiments, the end cover 12 can also be provided with a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 11 reaches a threshold value. The material of the end cover 12 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating piece can also be provided on the inner side of the end cover 12, which can be used to isolate the clamping components in the shell 13 from the end cover 12 to reduce the risk of short circuit. As an example, the insulating piece can be plastic, rubber, etc.

[0092] The shell 13 is a component for cooperating with the end cover 12 to form an internal environment of the battery cell 11, wherein the formed internal environment can be used to accommodate the electrode assembly 14, electrolyte and other components. The shell 13 and the end cover 12 can be independent components, and an opening can be provided on the shell 13, and the end cover 12 is used to cover the opening to form the internal environment of the battery cell 11. Without limitation, the end cover 12 and the shell 13 can also be integrated, specifically, the end cover 12 and the shell 13 can form a common connecting surface before other components enter the shell, and when it is necessary to seal the internal environment of the shell 13, the end cover 12 is used to cover the shell 13. The shell 13 can be various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the shell 13 can be determined according to the specific shape and size of the electrode assembly 14. The material of the shell 13 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0093] The electrode assembly 14 is a component in which electrochemical reactions occur in the battery cell 11. One or more electrode assemblies 14 can be contained in the shell 13. The electrode assembly 14 is mainly formed by winding and forming a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have a portion of active material constituting the main body of the electrode assembly.

[0094] Figure 4 For Figure 2 A partial enlarged view of the middle A, Figure 5 For Figure 2 A partial structure diagram of the middle box body; Figure 6 For Figure 2 A structure diagram of the sampling assembly, Figure 7 For Figure 6 A partial enlarged view of the middle C; Figure 8 A partial enlarged view of the sampling assembly in another embodiment of the present application; Figure 9 For Figure 2 A back view of the bus assembly; Figure 10 A cooperation diagram of the first clamping part and the second clamping part provided in the embodiment; Figure 11 For Figure 10 A cross-sectional view. Please refer to Figures 2 to 11The embodiment of the application provides a battery device 100, which comprises a shell 20, a current collection assembly 400, a sampling assembly 500 and a plurality of battery monomers 11; the shell 20 comprises a box body 21 and a cover body 22, the box body 21 contains the plurality of battery monomers 11, and the cover body 22 is arranged on an opening of the box body 21; the current collection assembly 400 is electrically connected with the plurality of battery monomers 11, and the current collection assembly 400 has a first clamping part 410, and the first clamping part 410 comprises at least one protrusion 411; the sampling assembly 500 is connected to an inner side of the cover body 22 facing the box body 21, and the sampling assembly 500 has a second clamping part 510, and the second clamping part 510 comprises at least one clamping groove 511 for clamping one-to-one with the at least one protrusion 411, and the clamping groove 511 comprises a through groove with a first opening at both ends in the maximum expansion direction of the battery monomer; the second clamping part 510 is used for clamping and connecting with the first clamping part 410 when the cover body 22 is covered with the box body 21, so that the sampling assembly 500 and the current collection assembly 400 are electrically connected through the electrical connection of the first clamping part 410 and the second clamping part 510.

[0095] In the embodiment, the shell 20 can comprise the box body 21 and the cover body 22, as shown in Figure 2 In the embodiment, the box body 21 can have a containing cavity, and the top of the containing cavity can have an opening, and the cover body 22 can be connected by covering the opening, so that the box body 21 and the cover body 22 are connected.

[0096] The box body 21 is the structural cornerstone of the whole battery device, and it needs to provide a stable and flat mounting platform for the battery monomers, so as to ensure the precision and mechanical stability of the stacked battery monomers. At the same time, the box body 21 constitutes the bottom protective barrier of the battery device, and can directly resist external impact and environmental invasion from flying stones on the road, scratches, accumulated water and the like, and is very important to protect the structural integrity of the battery device.

[0097] The box body 21 can contain a plurality of battery monomers 11, and the plurality of battery monomers can be arranged in an array, as shown in Figure 2 In the embodiment, the battery device 100 can comprise two rows of battery monomer groups, and the current collection assembly 400 can be arranged on the top of the battery monomers 11. The current collection assembly 400 can electrically connect the positive and negative electrodes of the battery monomers or the battery modules in series and parallel, so as to form a required total voltage and capacity output loop. Specifically, the current collection assembly 400 can be welded with the electrode terminals 15 of the battery monomers 11, so as to connect the plurality of battery monomers 11, and the current collection assembly 400 can be used for transmitting current, so as to realize series connection, parallel connection or hybrid connection of the battery monomers 11 and the like.

[0098] At the same time, the current collection assembly 400 also provides a physical interface for the connection of the voltage sampling points.

[0099] The cover 22 can be a key component for sealing and protecting the top of the battery device, and it can be highly integrated with the sampling assembly as a "sampling platform" to carry the physical carrier and interface for signal acquisition of the battery device. It can be understood that the cover 22 can be a plate structure, which can be made of insulating materials such as plastic, or can be formed by composite injection molding of plastic and metal materials. For example, the inner side surface of the cover 22 facing the box 21 can be an insulating surface, and the sampling assembly 500 can be arranged on the insulating surface. The sampling assembly 500 can be connected with the cover 22 by bonding, screwing, clamping, etc.

[0100] The sampling assembly 500 as a neural network structure for signal acquisition can be used to acquire temperature or voltage signals of the battery cells. The bus assembly 400 has a first clamping portion 410, and the sampling assembly 500 has a second clamping portion 510. When the cover 22 and the box 21 are closed, the first clamping portion 410 and the second clamping portion 510 can be clamped and connected.

[0101] It can be understood that the sampling assembly 500 can be precisely installed on the pre-set fixed point on the inner side of the cover by positioning installation, and the bus assembly 400 can also be positioned and installed with the box. When the cover and the box are positioned and installed, the corresponding between the sampling assembly 500 and the bus assembly 400 can be realized, that is, the first clamping portion 410 can be aligned with and clamped to the second clamping portion 510.

[0102] In addition, the first clamping portion 410 and the second clamping portion 510 can also be made of conductive materials, so that when the first clamping portion 410 and the second clamping portion 510 are clamped and connected, the first clamping portion 410 and the second clamping portion 510 can be electrically connected, thereby realizing the electrical connection between the bus assembly 400 and the sampling assembly 500.

[0103] It can be understood that in some embodiments, the first clamping portion can be a voltage sampling point, and the connection of the first clamping portion 410 and the second clamping portion 510 can realize voltage sampling.

[0104] In this embodiment, the first clamping portion 410 can include one or more protrusions 411, which can be arranged on the bus assembly 400 and can protrude towards the cover 22. The shape of the protrusion 411 can be various, such as strip-shaped, spherical, block-shaped, etc.

[0105] The second clamping portion can include one or more clamping grooves 511, and the number of the clamping grooves 511 can be consistent with the protrusions, which can correspond one by one. The shape of the clamping groove 511 can match the shape of the protrusion 411, thereby realizing the clamping of the two.

[0106] It can be understood that the maximum expansion direction of the battery cell can be the direction in which the battery cell is most likely to expand and deform. For example, for a prismatic battery cell, the maximum expansion direction can be the direction perpendicular to the longitudinal direction of the battery cell. Figure 3The square battery monomer in the battery device 100 has a maximum expansion direction, which is the first direction X, i.e., the width direction of the battery monomer. When the battery monomers are arranged and installed in the box, the maximum expansion direction can also be Figure 2 the first direction X.

[0107] As shown in Figure 7 and Figure 10 The clamping groove 511 can be a through groove with both ends not sealed. The through groove can extend along the first direction X (the maximum expansion direction). The cross-sectional shape of the clamping groove 511 can be set according to the situation.

[0108] When the battery monomer expands, it will drive the deformation of the busbar assembly, causing the connection position of the busbar assembly and the sampling assembly to deform along the maximum expansion direction. By setting the clamping groove as a through groove, the protrusion on the busbar assembly can be allowed to move relative to the clamping groove, thereby avoiding pulling the sampling assembly.

[0109] In addition, by setting the size of the clamping groove 511 along the first direction X and the size of the protrusion 411 along the first direction X, the clamping groove 511 can still cooperate with the protrusion 411 after expansion deformation, thereby stably achieving electrical connection. It can be understood that in the installation process of the battery device in the embodiment, the sampling assembly 500 can be pre-installed on the cover 22, the battery monomers 11 can be installed in the box 21, then the busbar assembly 400 is connected to the top surface of the battery monomers 11, and then the cover 22 is covered on the opening of the box 21. At this time, the clamping connection between the protrusion and the clamping groove can be achieved, thereby achieving electrical connection through the contact between the clamping groove and the protrusion, and further achieving electrical connection between the busbar assembly 400 and the sampling assembly 500.

[0110] In the embodiment, the number of sampling assemblies 500 can be one or more, which can be set according to the arrangement of the battery monomers. For example, Figure 2 Two rows of battery monomers are shown in , which can correspond to two sampling assemblies 500. The busbar assembly 400 can be fixed and electrically connected to the two sampling assemblies 500 through clamping.

[0111] In addition, in the embodiment, the battery device 100 can be a battery pack or a battery module, which can be set according to the needs. The battery monomers 11 can also be pre-formed into a battery module and installed in the shell to form a battery device.

[0112] It can be understood that in the related art, the flexible circuit board and the busbar are pre-welded into a CCS, and then the CCS is installed on the battery box. Since the flexible circuit board is generally arranged on the busbar, it is easy to be damaged by other components or tools. Therefore, after installing the CCS, an insulating sheet needs to be pasted on the surface to play an insulating protection role before the upper cover is installed, so as to avoid damaging the flexible circuit board.

[0113] In the embodiment, by installing the sampling assembly on the cover body, when the cover body is combined with the box body, the sampling assembly can be installed and electrically connected with the bus assembly through the clamping of the first clamping part and the second clamping part. Compared with the scheme of first installing the CCS and then pasting the insulating sheet in the related art, the insulating sheet does not need to be set, and the insulating sheet installation process does not need to be set, so that the material can be saved, the cost is reduced, and the installation process is simplified.

[0114] In addition, the sampling assembly is directly installed on the cover body, and no assembly space needs to be reserved on the inside of the cover body, so that the thickness of the cover body can be reduced, and the energy density of the battery can be improved.

[0115] In addition, the sampling assembly is directly installed on the cover body, and no assembly space needs to be reserved on the inside of the cover body, so that the thickness of the cover body can be reduced, and the energy density of the battery can be improved.

[0116] In the embodiment, the clamping connection and electrical connection of the bus assembly and the sampling assembly are achieved through the clamping of the clamping groove and the protrusion, and the structure is simple and easy to implement.

[0117] By setting the clamping groove as a through groove, when the battery monomer expands, the protrusion on the bus assembly can move relative to the clamping groove, so that the sampling assembly is prevented from being pulled, and stable electrical connection of the sampling assembly and the bus assembly can be achieved.

[0118] According to some embodiments of the present application, the inside of the cover body 22 is provided with a first connecting part 710, the sampling assembly 500 is provided with a first matching part 720, the first connecting part 710 is in positioning connection with the first matching part 720; the cover body 22 is further provided with a second connecting part 730, the bus assembly 400 is provided with a second matching part 740, and the second connecting part 730 is in positioning connection with the second matching part 740.

[0119] In the embodiment, the cover body 22 can be provided with the first connecting part 710, and the sampling assembly 500 can be provided with the first matching part 720. One of the first connecting part 710 and the first matching part 720 can be a first positioning groove, and the other can be a first positioning column. The cover body 22 and the sampling assembly 500 can be in positioning connection by inserting the first positioning column into the first positioning groove.

[0120] In addition, the cover 22 can be further provided with a second connecting portion 730, and the current collection assembly 400 can be provided with a second matching portion 740. One of the second connecting portion 730 and the second matching portion 740 can be a second positioning slot, and the other can be a second positioning column. The cover 22 and the current collection assembly 400 can be positioned and connected by inserting the second positioning column into the second positioning slot.

[0121] It can be understood that, in addition to the positioning mode of the positioning slot and the positioning column, the positioning and connection between the first connecting portion 710 and the first matching portion 720 and between the second connecting portion 730 and the second matching portion 740 can also have other positioning structures, for example, the positioning can be achieved by aligning the positioning holes. The specific arrangement can be set according to the actual situation.

[0122] In the embodiment, the cover and the sampling assembly can be positioned and connected through the first connecting portion and the first matching portion, and the cover and the current collection assembly can be positioned and connected through the second connecting portion and the second matching portion. When the cover and the box body are assembled, the sampling assembly and the current collection assembly can be precisely positioned, that is, the first clamping portion and the second clamping portion can be precisely clamped and connected, which is beneficial to improve the precision and reliability of the connection between the sampling assembly and the current collection assembly. In addition, the sampling assembly and the current collection assembly only need to rely on the positioning and connection of the cover to achieve precise positioning, and the involved components are less, and the positioning precision is higher.

[0123] According to some embodiments of the present application, the first connecting portion 710 includes at least one first connecting hole 711, the first matching portion 720 includes at least one first matching hole 721, the first connecting hole 711 is detachably connected with the first matching hole 721 through a first fastener 750; the second connecting portion 730 is arranged at the edge of the cover 22, the second connecting portion 730 includes at least one second connecting hole 731, the second matching portion 740 is arranged at the edge of the current collection assembly 400, the second matching portion 740 includes at least one second matching hole 741, and a second fastener 760 can pass through the second connecting hole 731 and the second matching hole 741 and be detachably connected with the box body 21.

[0124] It can be understood that the first connecting portion 710 can include one or more first connecting holes 711 (as shown by the position of the first connecting hole 711 on the cover exposed through the first matching hole 721), and a plurality of first connecting holes 711 can be dispersedly arranged on the sampling assembly 500, for example, the sampling assembly 500 can extend along the first direction X, and a plurality of first connecting holes 711 can be arranged in the sampling assembly 500 along the first direction X. Figure 4 Figure 2

[0125] ​​Correspondingly, the first matching part 720 on the sampling assembly 500 can also include one or more first matching holes 721, and the first connecting holes 711 can correspond to the first matching holes 721 one by one, for example, the hole diameters of the two can be the same.

[0126] The first fastener 750 can be a detachable fastener such as a screw or a rivet, so as to realize detachable connection of the sampling assembly 500 and the cover body. Figure 4 In the exploded view, the first fastener 750 can be arranged through the first connecting hole 711 and matched with the first matching hole 721, so as to accurately install the sampling assembly 500 on the preset installation position of the cover body 22.

[0127] Similarly, the second connecting part 730 can include one or more second connecting holes 731, which can be arranged on the edge of the cover body 22, for example, Figure 2 As shown, the four edges of the cover body 22 can be uniformly distributed with a plurality of second connecting holes 731.

[0128] The second matching part 740 can also include one or more second matching holes 741, which can also be arranged on the edge of the bus assembly 400, for example, Figure 2 As shown, the area of the bus assembly 400 in the XY plane can be substantially the same as the area of the cover body 22 after being closed, and the four edges of the bus assembly 400 can be uniformly distributed with a plurality of second matching holes 741. Among them, the first direction X can be the length direction of the box body 21, Y can be the second direction perpendicular to the first direction X, which can be the width direction of the box body 21, and Z can be the direction perpendicular to the first direction X and the second direction Y, which can be the height direction of the box body 21. In addition, Figure 2 Among them, the XYZ direction is based on the direction of the box body, and since the cover body 22 is in an open state, its direction does not match the XYZ direction. Unless otherwise stated, the directions of the cover body and the sampling assembly in the following are based on the direction when they are closed on the box body.

[0129] In addition, the edge of the box body 21 can also be uniformly distributed with one or more installation holes. It can be understood that the second connecting hole, the second matching hole and the installation hole can correspond one by one, and the second fastener 760 can be arranged through the second connecting hole 731, the second matching hole 741 and matched with the installation hole in sequence.

[0130] It can be understood that in the embodiment, the edge of the bus assembly 400 can be mounted between the cover 22 and the box 21, and the second fastener 760 can also be used to connect the box 21 and the cover 22, and can pass through the second matching hole on the bus assembly 400 during the connection process, so as to realize the positioning connection between the cover 22 and the bus assembly 400. The second fastener 760 can be a screw or a rivet (detachable) or other detachable fastener, so that the cover and the box can be detachable.

[0131] In the embodiment, the first fastener can be connected with the first connecting hole and the first matching hole, so as to realize the disassembly of the sampling assembly and the cover. When the sampling assembly has a problem, it can be replaced conveniently without scrapping the entire battery device, thereby reducing production loss. At the same time, the installation and positioning of the sampling assembly and the cover can be realized, and the structure is simple.

[0132] The second fastener, the second connecting hole and the second matching hole can realize the positioning between the bus assembly and the cover by using the connection structure of the box and the cover, thereby simplifying the structure. Compared with the positioning connection mode of the bus assembly and the cover, the positioning connection mode of the box and the cover, and the positioning connection mode of the cover and the sampling assembly, the number of components involved in the positioning process can be reduced, so that the positioning of the bus assembly and the sampling assembly can be realized accurately, the clamping connection of the first clamping part and the second clamping part can be realized accurately, and the precision and reliability of the connection between the sampling assembly and the bus assembly can be improved.

[0133] Please refer to Figure 6 and Figure 7 According to some embodiments of the present application, the sampling assembly 500 includes a sampling body 520 extending along a first direction X and a first conductive part 530 connected to both ends of the sampling body 520 along a second direction Y, and the second clamping part 510 is arranged on the first conductive part 530, and the sampling body 520 and the first conductive part 530 are both provided with a first matching part 720; wherein the first direction X and the second direction Y are arranged vertically.

[0134] The sampling body 520 can be the circuit body of the sampling assembly 500, for example, it can be an FPC. The sampling body 520 can extend along the first direction X, that is, along the length direction of the battery device 100, as shown in Figure 6 The two end edges of the sampling body 520 along the second direction can each be provided with one or more first conductive parts 530. The first conductive part 530 can be made of a material such as nickel sheet that can realize electrical conduction, and it can be used as a key voltage sampling point connector. A plurality of first conductive parts 530 are usually arranged in groups, corresponding to the sampling positions of each module or battery monomer group.

[0135] The first conductive member 530 can be used to connect the sampling body 520 and the bus assembly 400. It can be understood that the FPC has a certain flexibility, and by arranging the first conductive member 530 with better rigidity thereon, the FPC can be conveniently clamped with the bus assembly 400 to realize voltage sampling.

[0136] In addition, the second clamping portion 510 can be arranged on the first conductive member 530. In some embodiments, the clamping groove 511 can be arranged on the edge of the sampling body 520, for example, on the edge of the two ends of the sampling body 520 along the second direction Y. In other embodiments, the clamping groove 511 can be arranged on the end of the first conductive member away from the sampling body 520 to be clamped with the bus assembly 400. The first matching portion 720 can also be arranged on the first conductive member 530, for example, one or more first matching holes 721 can be arranged on the first conductive member 530. Correspondingly, the first connecting hole 711 corresponding to the first matching hole 721 can be arranged on the inner side of the cover 22, so as to realize the accurate positioning of the first conductive member and the cover 22. It can be understood that, since the second clamping portion 510 is also arranged on the first conductive member 530, by arranging the first matching portion 720 directly on the first conductive member 530, the positioning error between the second clamping portion 510 and the cover can be further reduced, thereby reducing the positioning error between the first clamping portion and the second clamping portion 510 and improving the clamping accuracy.

[0137] In some embodiments, the clamping groove can be bent from the first conductive member 530, so as to simplify the processing steps, and at the same time, the second clamping portion bent from the first conductive member 530 can have a certain elasticity, which is more conducive to clamping connection.

[0138] In some embodiments, when the materials of the protrusion 411 and the clamping groove are different, a plating layer can be arranged on the protrusion 411 (the first clamping portion) or the clamping groove (the second clamping portion) to increase the conductivity between the two. For example, the clamping groove can be composed of a nickel sheet, and the protrusion 411 can be composed of copper or aluminum material. A nickel plating layer can be arranged on the surface of the protrusion 411 to increase the conductivity when the two are clamped.

[0139] It can be understood that when the first conductive member is a nickel sheet, it has a certain elasticity. When the clamping groove is bent from the nickel sheet, it can be accurately pressed against the protrusion on the bus assembly. The elastic pressure of the nickel sheet enables the voltage sampling point (the protrusion) and the nickel sheet to form a stable and low-resistance electrical contact, thereby accurately collecting the voltage signal of the battery monomer.

[0140] In some embodiments, as shown in FIG. 6, the first conductive member 530 further includes an extension 531 between the second clamping portion 510 and the sampling body 520. The extension 531 extends along the second direction Y, and the extension 531 protrudes from the edge of the sampling body 520. Figure 7

[0141] ​It can be understood that the extension part 531 can provide installation space for the first matching part 720, and at the same time, the second clamping part 510 can slightly protrude from the sampling body 520, avoiding the problem of assembly interference between the sampling body 520 and the bus assembly due to too close distance.

[0142] In the embodiment, by arranging the first conductive part on the edge of the sampling body and arranging the first matching part and the second clamping part on the first conductive part, the positioning error between the second clamping part and the cover can be further reduced, thereby reducing the positioning error between the first clamping part and the second clamping part and improving the clamping accuracy. In addition, the electrical connection between the sampling assembly and the bus assembly can be directly realized through the clamping of the first clamping part and the second clamping part.

[0143] According to some embodiments of the present application, as Figure 7 shown, the part of the sampling body 520 around the first conductive part 530 is provided with a first hollow part 521 penetrating the sampling body 520.

[0144] It can be understood that the sampling body 520 can be generally in a sheet structure, and the first hollow part 521 can be arranged around the connection between the first conductive part 530 and the sampling body 520. The first hollow part can penetrate the sampling body in the direction perpendicular to the sampling body 520, i.e., the third direction Z, so that the two sides of the sampling body can be communicated through the first hollow part. The first hollow part 521 can include an opening or a hole arranged on the sampling body 520, for example, it can be a long strip opening in Figure 7 , and holes can be arranged at both ends of the opening. Of course, the first hollow part 521 can also have other shapes.

[0145] It can be understood that the first hollow part 521 can extend along the maximum expansion direction of the battery monomer. The maximum expansion direction of the battery monomer can be the direction in which the battery monomer is most likely to expand and deform, for example, for the square battery monomer in Figure 3 , the maximum expansion direction is the first direction X direction, i.e., the width direction of the battery monomer, and when the battery monomers are arranged and installed in the box, the maximum expansion direction can also be the first direction X in Figure 2 .

[0146] The first hollow part 521 can form an opening and a hole on the sampling body 520, thereby reducing the rigidity of the part and improving the deformation ability. When the battery monomer expands, the first hollow part 521 can deform to adapt to avoid pulling the sampling body and causing damage to the sampling body.

[0147] Please refer to Figure 8In some embodiments, the first cutout portion 521 may not be provided on the sampling body 520. In this case, there is no need to reserve additional space for the first cutout portion 521 on the sampling body 520, thereby reducing the width of the sampling body 520 along the second direction Y, increasing the panelization rate of the FPC substrate, and providing sufficient space for the design of the busbar assembly.

[0148] It is understood that when the first hollow part 521 is not provided, the solution provided in this embodiment can be used for battery cells with insignificant expansion, or the expansion deformation can be released by the engagement shape between the first engagement part and the second engagement part, which will be explained in detail in the following embodiments.

[0149] like Figure 11 As shown, according to some embodiments of this application, the card slot 511 includes a first segment 5111 and a second segment 5112 connected sequentially along the depth direction of the card slot 511, with the bottom of the card slot 511 located in the second segment 5112; taking the cross section perpendicular to the depth direction of the card slot 511 as the cross section, the first segment 5111 is used to clamp the protrusion 411, the cross-sectional area of ​​the second segment 5112 is larger than the cross-sectional area of ​​the first segment 5111, and the cross-sectional area of ​​the second segment 5112 gradually increases from the end closer to the first segment 5111 to the end away from the first segment 5111.

[0150] In this embodiment, the depth direction of the card slot 511 can be Figure 11 The depth gradually increases from bottom to top, and the first segment 5111 can be located at the lower end of the second segment 5112.

[0151] When engaged, the cross-sectional area of ​​the first segment 5111 is the same as that of the protrusion 411. The first segment 5111 can fit against the protrusion 411 to lock the protrusion. The cross-sectional area of ​​the second segment 5112 can be larger than that of the protrusion 411, so that there is a certain space between the sidewall of the protrusion 411 and the sidewall of the second segment 5112.

[0152] In addition, the cross-sectional area of ​​the second segment 5112 can be along... Figure 11 The surface decreases from top to bottom, forming a roughly converging trapezoidal shape. This allows the second segment 5112 to exert a force on the first segment 5111 to converge when the segments are engaged, thus enabling the first segment to lock the protrusion and achieve a stable and reliable connection.

[0153] In some embodiments, the end of the first segment away from the second segment may have a guide segment. The cross-sectional area of ​​the guide segment increases from the end closer to the first segment to the end farther away from the first segment, thereby playing a guiding role and facilitating the protrusion 411 to enter the slot, thus improving the situation where the protrusion and the slot cannot be engaged due to errors.

[0154] The first section can realize the close connection of the protrusion and the clamping groove, and the second section can apply pressure to the first section, thereby improving the reliability of the clamping.

[0155] According to some embodiments of the present application, as shown in Figure 4 The inner side of the cover 22 is provided with a first accommodating groove 23, and the first accommodating groove 23 is used to accommodate at least part of the clamping groove 511.

[0156] The cover 22 can have a generally planar inner surface, and the position corresponding to the clamping groove 511 can be provided with the first accommodating groove 23. The depth of the first accommodating groove 23 can be set according to the depth dimension of the clamping groove 511.

[0157] It can be understood that the cover 22 can be provided with one or more first accommodating grooves 23. When a plurality of first accommodating grooves 23 are provided, each first accommodating groove 23 can accommodate one or more clamping grooves 511. Alternatively, one first accommodating groove 23 can be provided, and all the clamping grooves 511 can be accommodated in the first accommodating groove 23.

[0158] Figure 4 In some embodiments, one first accommodating groove 23 can be provided on each side of the sampling assembly 500, and the first accommodating groove 23 can extend in the first direction, so that the plurality of clamping grooves 511 on each side of the sampling assembly 500 can be clamped in one first accommodating groove 23.

[0159] The embodiment sets the first accommodating groove 23 on the inner side of the cover 22, so that at least part of the clamping groove 511 protruding from the sampling body can be located in the first accommodating groove 23, thereby effectively improving the space utilization of the battery device and improving the energy density thereof.

[0160] According to some embodiments of the present application, please refer to Figure 5 and Figure 9 The busbar assembly 400 includes an insulating portion 420 and a conductive portion 430 connected to the insulating portion 420. The conductive portion 430 is electrically connected to a plurality of battery monomers 11, and the first clamping portion 410 is arranged at the edge of the conductive portion 430.

[0161] The busbar assembly 400 can include an insulating portion 420 and a conductive portion 430. The insulating portion can be made of insulating materials such as plastic and rubber, and the conductive portion 430 can be made of conductive materials such as copper, aluminum or alloy.

[0162] As shown in Figure 9 The conductive portion 430 can include a plurality of sheet structures, which can be used to connect the electrode terminals 15 of adjacent two battery monomers, for example, can be welded to the electrode terminals 15, thereby realizing the series and parallel connection of the battery monomers.

[0163] The insulating portion 420 can be used to cover or carry the conductive portion 430. It can be understood that part (key connection point) of the conductive portion 430 can be exposed to the insulating portion 420, so as to facilitate welding of the conductive portion 430 with the battery monomer 11. In addition, the second matching portion 740 can be arranged on the insulating portion 420, so as to facilitate connection with the box body 21.

[0164] The first clamping portion 410 can be arranged on the conductive portion 430, for example, can be bent by the edge of the conductive portion 430, so as to realize the electrical connection between the sampling assembly and the conductive portion 430 while realizing the clamping connection.

[0165] In the embodiment, by arranging the conductive portion and the insulating portion, the current collection function of the current collection assembly can be realized, and meanwhile, the connection with the box body and the cover body is facilitated, which is helpful to realize the installation and positioning. The first clamping portion is arranged on the conductive portion, so as to realize the electrical connection between the sampling assembly and the conductive portion while realizing the clamping connection, and the structure is simple.

[0166] According to some embodiments of the present application, the insulating portion 420 and the conductive portion 430 are processed into an integral piece through an integral molding process, or the insulating portion 420 is an insulating film for mounting the conductive portion 430.

[0167] In the embodiment, the connection mode between the insulating portion 420 and the conductive portion 430 can be various, for example, the insulating portion 420 and the conductive portion 430 can be processed through an integral molding mode of different materials, for example, 3D printing or double-color injection molding, which has the advantages of high efficiency and high reliability. Taking injection molding as an example, the specific operation can be that the conductive portion which is accurately bent and formed in advance is accurately prearranged in a specially designed injection molding cavity, high-pressure injection engineering plastics (such as PPA (Polyphthalamide), PBT (Polybutylene Terephthalate), and other materials with excellent electrical insulation, high-temperature resistance and mechanical strength) is used to cover the conductive portion (the necessary connection points need to be reserved for windowing), and a rigid assembly with strong structure, high integration, excellent electrical insulation and mechanical protection performance is formed. It can be understood that the rigidity and high dimensional stability of the integral molding can reduce the error of subsequent assembly, greatly improve the rigidity and shock resistance of the assembly, and simplify the general assembly steps of the battery device.

[0168] For example, the insulating part 420 can be an insulating film, and the conductive part 430 can be installed in the insulating film to form a busbar assembly 400. Specifically, the conductive part can be pre-fixed onto a flexible or rigid insulating film (such as a PET (Polyethylene Terephthalate) film or an engineering plastic sheet) to form a busbar assembly. During the final assembly of the battery device, this busbar assembly with the insulating film is placed on top of the already installed battery cells for automated handling.

[0169] In addition, regardless of which of the above methods is used to process the busbar assembly, after it is placed on top of the battery cell, the conductive part with the pre-reserved opening on the busbar assembly can be welded to the electrode terminal of the battery cell using high-precision laser welding and other technologies. This allows the busbar assembly to be pre-precisely welded and fixed on the designated sampling point of the corresponding battery cell or battery module.

[0170] Both of the above methods can achieve the processing and shaping of the busbar component, and can be connected to the sampling component through snap-fit ​​connection, and the processing method is simple and reliable.

[0171] Based on some embodiments of this application, continue to refer to Figure 9 The conductive part 430 includes a plurality of second conductive elements 431, which are welded to the electrode terminals 15 of the battery cell 11, and the insulating part 420 located between two adjacent second conductive elements 431 is provided with a second hollow part 421 that penetrates the insulating part 420.

[0172] The second conductive element 431 can be made of a conductive material, such as aluminum or copper, and can be a sheet structure. The second conductive element 431 can be welded to the electrode terminals 15 of two adjacent battery cells 11 to realize the connection between the battery cells.

[0173] Furthermore, a second hollow portion 421 may be provided on the insulating portion 420 between adjacent second conductive elements 431. The second hollow portion can penetrate the insulating portion in a direction perpendicular to the insulating portion, i.e., a third direction Z, so that the two sides of the insulating portion 420 can be connected through the second hollow portion. The second hollow portion 421 may contain a notch or a hole. For example, it may be a long strip-shaped notch similar to the first hollow portion, with holes provided at both ends of the notch. Of course, the second hollow portion 421 may also have other shapes. It can be understood that the second hollow portion 421 can extend along the maximum expansion direction of the battery cell.

[0174] in addition, Figure 9 The diagram shows four columns of second conductive elements 431 arranged along the first direction. The distance between two adjacent second conductive elements 431 can refer to the distance between two adjacent second conductive elements in each row, or it can refer to the two adjacent second conductive elements in the middle rows along the second direction Y.

[0175] The second hollowed part 421 can form an opening and a hole on the insulating part, so as to reduce the rigidity of the part and improve the deformation ability. When the battery monomer expands, the second hollowed part 421 can deform to adapt to avoid pulling the busbar assembly and causing damage to the busbar assembly.

[0176] According to some embodiments of the present application, please refer to Figure 2 and Figure 5 The surface of the insulating part 420 towards the cover 22 is provided with a second accommodating groove 422 for accommodating at least part of the sampling assembly 500.

[0177] According to the above analysis, the busbar assembly 400 can be roughly a planar plate structure, and the conductive part 430 can be arranged at a position corresponding to the electrode terminal. Since there is a certain distance between the two electrode terminals of each battery monomer, the second accommodating groove 422 can be arranged on the insulating part 420 at a position corresponding to the space between the two electrode terminals, thereby providing space for the installation of the sampling assembly 500.

[0178] For example, Figure 2 two groups of battery monomers 11 arranged along the first direction X are shown in Figure 9 , four rows of electrode terminals can be formed, and four rows of second conductive parts (such as ) can be arranged correspondingly. Two sampling assemblies 500 can be arranged for the two groups of battery monomers 11, and each sampling assembly 500 can be arranged correspondingly between two rows of electrode terminals of the same group of battery monomers.

[0179] It can be understood that the second accommodating groove 422 can be arranged at a position corresponding to the sampling assembly 500 on the insulating part 420, and the first clamping part 410 can be arranged at an edge position of the second accommodating groove 422. After the cover 22 is installed on the box 21, at least part of the sampling assembly 500 in the third direction can be accommodated in the second accommodating groove 422, and the second clamping part at the edge of the sampling assembly 500 can be clamped with the first clamping part at the edge of the first accommodating groove 23. The space of the box is reasonably utilized, thereby further reducing the volume of the battery device and improving the energy density.

[0180] The present embodiment can provide installation space for the sampling assembly by arranging the second accommodating groove on the insulating part, thereby further compressing the volume of the battery device and improving the energy density. At the same time, the thickness of the insulating part can be reduced, and the weight of the insulating part can be reduced while insulating, and the energy density can be improved.

[0181] Figure 12 For Figure 6 the local enlarged view of D in Figure 5 and Figure 12According to some embodiments of the present application, the sampling assembly 500 comprises a support 550 and a temperature sensor 540 connected to the support 550, and the busbar assembly 400 is provided with a temperature measurement opening 440 corresponding to the temperature sensor 540, which is used to connect the temperature sensor 540 with the temperature measurement point of the battery cell 11.

[0182] The sampling assembly can comprise a temperature sensor 540, which can be an NTC (Negative Temperature Coefficient) thermistor, used to directly collect temperature data of the battery cell.

[0183] In order to install the temperature sensor 540, the sampling assembly 500 can further comprise a support 550, and the temperature sensor 540 can be installed on the support 550, which is used to accurately fix and position the temperature sensor.

[0184] The support 550 can also be provided with a first matching part 720, so as to be positioned and connected with the first connecting part 710 on the cover, for example, fixed to the cover by a first fastener, so that the temperature sensor 540 can be accurately installed.

[0185] It can be understood that the temperature sensor 540 can detect the temperature of the temperature measurement point of the battery cell, and it can be understood that the temperature measurement point can be the surface of the battery cell, or other temperature detection points. In order to enable the temperature sensor to directly or indirectly thermally transfer with the temperature measurement point, the insulating part 420 can be provided with a temperature measurement opening 440, which can penetrate the busbar assembly 400 along the third direction Z, and the temperature sensor can be correspondingly arranged with the temperature measurement opening 440. When the cover is connected to the box by covering, the temperature sensor can directly contact or indirectly thermally transfer with the temperature measurement point through the temperature measurement opening.

[0186] The temperature measurement opening 440 can be a reserved window on the busbar assembly, and when the cover is covered, the temperature sensing surface (detection surface) of the temperature sensor 540 can directly abut against the temperature measurement point on the surface of the battery cell or the pre-set temperature measurement point in the box. In addition, a heat-conducting pad can also be provided on the temperature sensing surface, so that the temperature sensing can quickly respond and have high accuracy. The heat-conducting pad can be heat-conducting silicone or the like, which can be bonded between the temperature measurement point and the temperature sensing surface to achieve rapid heat conduction.

[0187] In the present embodiment, the support can enable the temperature sensor to be accurately installed and have moderate pressure, which is conducive to the accuracy of temperature measurement, and the temperature measurement opening can enable the temperature sensor to thermally transfer with the temperature measurement point, which is convenient for detecting the temperature of the battery cell.

[0188] Figure 13 For Figure 2 The local enlarged view of the connector in the middle is shown inFigure 2 and Figure 13 According to some embodiments of the present application, the sampling assembly 500 comprises a connector 560 arranged at one end of the sampling assembly 500, and a BMS 600 is arranged in the box 21, wherein the BMS 600 comprises a connector base 610, and the connector 560 is used to be plugged with the connector base 610 when the cover 22 is covered on the box 21.

[0189] The BMS (Battery Management System) can be arranged in the box 21, for example Figure 2 at one end of the box along the first direction X. The BMS can be fixed on the side wall of the box or an internal support.

[0190] The sampling assembly 500 can be connected with the BMS, so that the collected voltage, temperature and other signals can be transmitted to the BMS, so as to facilitate the management and monitoring of the battery device by the BMS.

[0191] It can be understood that the end of the sampling assembly 500 corresponding to the position of the BMS can be provided with a connector 560, for example, the connector 560 can be arranged at one end of the sampling assembly 500 along the first direction X.

[0192] The BMS 600 can be provided with a connector base 610, and during the covering process of the cover on the box, the connector 560 can be directly aligned and plugged on the connector base 610 of the BMS, forming a complete low-voltage signal path, realizing the high-speed and reliable electrical connection between the sampling assembly and the BMS, so as to facilitate the transmission of voltage, temperature and other signals.

[0193] The structure of the connector and the connector base can be in the form of a common plug and socket that can realize plugging, and can be set according to actual conditions. In addition, when a plurality of sampling assemblies 500 are arranged, one connector can be arranged for each sampling assembly, and the same number of connector bases as the connectors can also be arranged on the BMS, so that each connector can be plugged on the BMS, realizing the collection and transmission of all signals.

[0194] In addition, in order to realize the plugging of the connector and the connector base, the insulating part of the bus assembly can also be provided with a through hole, so that the connector can pass through the through hole and be plugged and installed with the connector base.

[0195] In some embodiments, as Figure 13 the connector 560 can also be provided with a first matching part 720, for example, a first matching hole 721, and the cover 22 is provided with a first connecting part, and the positioning and connection of the connector 560 and the cover are realized through the first connecting part and the first matching part 720, so that during the covering process of the cover on the box, the connector 560 can be precisely plugged on the connector base.

[0196] In the embodiment, the connector base is arranged on the BMS, and the connector is arranged on the sampling assembly and is plugged with the connector base, so that the connection between the sampling assembly and the BMS is realized when the cover is closed, the signal transmission is facilitated, the assembly steps are simplified, and the assembly efficiency is improved.

[0197] In the embodiment, the sampling assembly can be integrated on the cover to form an integral module by using the cover space in advance, the busbar assembly is pre-welded and positioned in the box, and when the cover is installed, the automatic clamping of the first clamping part and the second clamping part and the blind insertion of the connector and the connector base are realized, so that the sampling is highly automated and reliable, the assembly and signal transmission are realized, the manufacturing cost and the failure rate are effectively reduced, and the overall performance and safety of the battery device are improved.

[0198] Figure 14 For Figure 5 In the local enlarged view of B in FIG. 4, the output part 450 is arranged on the busbar assembly 400, the total output part 24 is arranged in the box 21, the first through hole 451 is arranged on the output part 450, the second through hole 27 is arranged on the total output part 24, and the output part base 25 is arranged in the box 21. The threaded connecting piece 26 is threaded through the first through hole 451 and the second through hole 27 and is screwed with the output part base 25. Figure 14 Figure 2 According to some embodiments of the present application, the busbar assembly 400 has an output part 450 for outputting current, the box 21 is provided with a total output part 24, the output part 450 is provided with a first through hole 451, the total output part 24 is provided with a second through hole 27, and the box 21 is further provided with an output part base 25. The threaded connecting piece 26 is threaded through the first through hole 451 and the second through hole 27 and is screwed with the output part base 25.

[0199] It can be understood that the total positive electrode and the total negative electrode of the battery device are usually designed as electrode pillars with threaded holes, which are integrated on the busbar assembly 400 or are led out through the conductive part on the busbar assembly 400.

[0200] Figure 14 The leading-out mode of the total positive electrode or the total negative electrode is shown in FIG. 4, the total output part 24 can be connected with the total positive electrode or the total negative electrode, and the output part 450 can be a current output end in the busbar assembly 400, which can be part of the conductive part, for example, the output part 450 can be located at one end of the conductive part in the first direction X. By connecting the output part 450 and the total output part 24, the total current output of the plurality of battery monomers 11 can be realized.

[0201] Specifically, the total output part can be provided with the second through hole 27, the output part can be provided with the first through hole 451, and the threaded connecting piece 26 can be threaded through the first through hole and the second through hole 27 and screwed with the output part base 25, for example, screwed in the threaded hole of the output part base 25.

[0202] The total output part and the output part can be made of conductive metals such as copper or aluminum, and the materials of the two can be the same or different for the purpose of realizing electrical connection. The output part base can be made of insulating material. ​

[0203] It can be understood that, during assembly, the busbar assembly can be first mounted to the battery monomer top of the box body, the conductive part is welded to the electrode terminal, and then the threaded connecting piece 26 can be locked to the output part base using a high-precision torque wrench, the connection between the total output part and the output part is realized, the mechanical firmness and low contact resistance of the large-current output are realized. Compared with the FPC welding to the busbar in the related art, the connection between the busbar assembly and the total output part can be realized before the sampling assembly is mounted, and the connection is stable and reliable.

[0204] The embodiment of the application provides a kind of electric device, it includes the battery device 100 in above-mentioned embodiment, battery device 100 is used to provide electric energy.

[0205] Wherein, electric device includes vehicle (such as vehicle, electric car, ship, spacecraft, etc.), display device (such as mobile phone, tablet computer, notebook computer, etc.), electric toy, electric tool, etc.

[0206] It can be understood that, the electric device provided by the application is applied to any above-mentioned battery device 100, so that the electric device has all the beneficial effects of the above-mentioned battery device 100, which will not be repeated here.

[0207] The embodiment of the application provides a kind of energy storage device, it includes the battery device 100 in above-mentioned embodiment, battery device 100 is used to store electric energy.

[0208] Energy storage device can include but not limited to centralized energy storage device (for example container energy storage device), distributed energy storage device, movable energy storage device, wearable energy storage device, etc.

[0209] It can be understood that, the energy storage device provided by the application is applied to any above-mentioned battery device 100, so that the energy storage device has all the beneficial effects of the above-mentioned battery device 100, which will not be repeated here.

[0210] The embodiment provides a battery device 100, comprising a shell 20, a current collection assembly 400, a sampling assembly 500 and a plurality of battery monomers 11; the shell 20 comprises a box body 21 and a cover body 22, the box body 21 contains the plurality of battery monomers 11, and the cover body 22 is arranged on an opening of the box body 21; the current collection assembly 400 is electrically connected with the plurality of battery monomers 11, and the current collection assembly 400 has a first clamping part 410, and the first clamping part comprises at least one protrusion 411; the sampling assembly 500 is connected to an inner side of the cover body 22 facing the box body 21, and the sampling assembly 500 has a second clamping part 510, and the second clamping part 510 comprises at least one clamping groove 511 for one-to-one clamping with the at least one protrusion 411, and the clamping groove 511 comprises a through groove with a first opening at both ends along a maximum expansion direction of the battery monomer; the second clamping part 510 is used for clamping connection with the first clamping part 410 when the cover body 22 is covered with the box body 21, so that the sampling assembly 500 and the current collection assembly 400 are electrically connected through the electrical connection of the first clamping part 410 and the second clamping part 510.

[0211] In some embodiments, the inner side of the cover body 22 is provided with a first connecting part 710, the sampling assembly 500 is provided with a first matching part 720, the first connecting part 710 comprises at least one first connecting hole 711, the first matching part 720 comprises at least one first matching hole 721, the first connecting hole 711 is detachably positioned and connected with the first matching hole 721 through a first fastener 750; the cover body 22 is further provided with a second connecting part 730, the current collection assembly 400 is provided with a second matching part 740, the second connecting part 730 is arranged on the edge of the cover body 22, the second connecting part 730 comprises at least one second connecting hole 731, the second matching part 740 is arranged on the edge of the current collection assembly 400, the second matching part 740 comprises at least one second matching hole 741, and a second fastener 760 can pass through the second connecting hole 731 and the second matching hole 741 and be detachably positioned and connected with the box body 21.

[0212] Through detachable connection, the sampling assembly can support modular non-destructive quick disassembly, and is convenient for later maintenance and replacement. When the battery monomer expands, the current collection assembly is deformed, so that the connection position of the current collection assembly and the sampling assembly is deformed along the maximum expansion direction. By arranging the clamping groove as a through groove, the protrusion on the current collection assembly can be allowed to move relative to the clamping groove, so that the sampling assembly is prevented from being pulled.

[0213] In addition, the sampling assembly 500 comprises a sampling body 520 extending along a first direction X and a first conductive piece 530 connected to both ends of the sampling body 520 along a second direction Y, the second clamping part 510 is arranged on the first conductive piece 530, and the first conductive piece 530 can be a spring piece type nickel sheet. The first clamping part can be a protrusion arranged on the current collection assembly, and the second clamping part can be a clamping groove.

[0214] The sampling assembly 500 further comprises a support 550 connected to the cover and a temperature sensor 540 connected to the support 550, and the busbar assembly 400 is provided with a temperature measurement opening 440 corresponding to the temperature sensor 540, which is used to connect the temperature sensor 540 with the temperature measurement point of the battery monomer 11.

[0215] The sampling assembly 500 comprises a connector 560 arranged at one end of the sampling assembly 500, and the BMS 600 arranged in the box 21 comprises a connector base 610, and the connector 560 is used to be plugged with the connector base 610 when the cover 22 is covered with the box 21.

[0216] In this embodiment, when the cover (pre-installed sampling assembly) is downwardly and oppositely buckled with the box bearing the busbar assembly, the clamping grooves on the elastic nickel sheets on both sides of the sampling assembly can be automatically and reliably clamped and pressed on the corresponding protrusions of the lower busbar assembly under mechanical guidance without manual intervention, and the temperature sensor can be directly abutted on the corresponding temperature measurement pad to realize temperature collection. Meanwhile, the box also does not need to additionally provide support for the temperature sensor, and after the heat-conducting pad is pasted on the temperature sensor, the temperature sensor can be directly abutted on the corresponding temperature measurement point to realize temperature collection.

[0217] At the same time, the connector of the sampling assembly can be synchronously and accurately inserted into the connector base reserved on the BMS mainboard when the cover is positioned, to form a complete low-voltage signal path, and the key voltage and temperature information inside the battery device can be finally stably transmitted to the BMS for processing and monitoring through the busbar assembly, the nickel sheet, the sampling assembly and the connector.

[0218] The battery device provided in this embodiment can generally comprise three functional modules: the box for structural bearing and protection, the busbar assembly for electrical busbar and connection core, and the cover (containing the sampling assembly) integrating signal collection and protection functions, which can realize high modularity, facilitate parallel production and quality control, greatly simplify the final assembly process, improve assembly production efficiency, optimize maintainability, and realize structural strength and electrical connection reliability, while realizing efficient thermal management and signal collection.

[0219] In addition, each key fixing point of the support, the first conductive member and the sampling body can be provided with a first matching part, so as to accurately correspond to the first connecting part and the first fastener on the inner side of the cover. The first fastener can be a rivet structure, and each first matching hole on the sampling assembly can be sleeved with the first fastener during assembly, to realize quick and firm mechanical connection, save additional adhesive, and improve assembly efficiency and reliability.

[0220] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Multiple battery cells; The outer casing includes a housing and a cover, the housing containing the plurality of battery cells, and the cover covering the opening of the housing; A busbar assembly is electrically connected to the plurality of battery cells, and the busbar assembly has a first engaging portion, the first engaging portion including at least one protrusion; A sampling component is connected to the inner side of the cover facing the housing, and the sampling component has a second engaging portion. The second engaging portion includes at least one slot for engaging with the at least one protrusion in a one-to-one correspondence. The slot includes a through groove with a first opening at both ends along the maximum expansion direction of the battery cell. The second engaging portion is used to engage with the first engaging portion when the cover is closed to the housing, so as to realize the electrical connection between the sampling component and the busbar component through the electrical connection between the first engaging portion and the second engaging portion.

2. The battery device according to claim 1, characterized in that, The inner side of the cover is provided with a first connecting part, and the sampling component is provided with a first mating part, and the first connecting part is positioned and connected to the first mating part; The cover is also provided with a second connecting part, and the busbar assembly is provided with a second mating part, wherein the second connecting part and the second mating part are positioned and connected.

3. The battery device according to claim 2, characterized in that, The first connecting part includes at least one first connecting hole, and the first mating part includes at least one first mating hole. The first connecting hole is detachably connected to the first mating hole by a first fastener. The second connecting part is disposed on the edge of the cover, and the second connecting part includes at least one second connecting hole. The second mating part is disposed on the edge of the manifold assembly, and the second mating part includes at least one second mating hole. The second fastener can pass through the second connecting hole and the second mating hole and be detachably connected to the housing.

4. The battery device according to claim 2, characterized in that, The sampling assembly includes a sampling body extending along a first direction and a first conductive member connected to both ends of the sampling body along a second direction. The second engaging portion is disposed on the first conductive member, and the sampling body and the first conductive member are both provided with the first mating portion. The first direction is perpendicular to the second direction.

5. The battery device according to claim 4, characterized in that, The portion of the sampling body located around the first conductive element has a first hollow portion that penetrates the sampling body.

6. The battery device according to any one of claims 1-5, characterized in that, The card slot includes a first segment and a second segment connected sequentially along the depth direction of the card slot, and the bottom of the card slot is located in the second segment; With the cross section perpendicular to the depth direction of the slot as the cross section, the first section is used to clamp the protrusion, the cross section area of ​​the second section is larger than the cross section area of ​​the first section, and the cross section area of ​​the second section gradually increases from the end closer to the first section to the end away from the first section.

7. The battery device according to claim 6, characterized in that, The inner side of the cover is provided with a first receiving groove, which is used to accommodate at least a portion of the card slot.

8. The battery device according to any one of claims 1-5, characterized in that, The busbar assembly includes an insulating portion and a conductive portion connected to the insulating portion. The conductive portion is electrically connected to the plurality of battery cells, and the first engaging portion is disposed at the edge of the conductive portion.

9. The battery device according to claim 8, characterized in that, The insulating part and the conductive part are processed into a single piece by an integral molding process, or the insulating part is an insulating film for mounting the conductive part.

10. The battery device according to claim 8, characterized in that, The conductive portion includes a plurality of second conductive elements, which are welded to the electrode terminals of the battery cell, and the insulating portion located between two adjacent second conductive elements is provided with a second hollow portion penetrating the insulating portion.

11. The battery device according to claim 8, characterized in that, The insulating portion has a second receiving groove on its surface facing the cover, the second receiving groove being used to receive at least a portion of the sampling component.

12. The battery device according to any one of claims 1-5, characterized in that, The sampling component includes a support member and a temperature sensor connected to the support member. The busbar component is provided with a temperature measuring opening corresponding to the temperature sensor, and the temperature measuring opening is used to allow the temperature sensor to be connected to the temperature measuring point of the battery cell.

13. The battery device according to any one of claims 1-5, characterized in that, The sampling component includes a connector disposed at one end of the sampling component. A BMS is disposed inside the housing. The BMS includes a connector base. The connector is used to insert into the connector base when the cover is closed with the housing.

14. The battery device according to any one of claims 1-5, characterized in that, The busbar assembly has an output section for outputting current, a main output section is provided in the housing, a first through hole is provided on the output section, a second through hole is provided on the main output section, an output section base is also provided in the housing, and a threaded connector passes through the first through hole and the second through hole and is screwed to the output section base.

15. An electrical appliance, characterized in that, The electrical device includes a battery device as described in any one of claims 1-14, the battery device being used to provide electrical energy.

16. An energy storage device, characterized in that, The energy storage device includes a battery device as described in any one of claims 1-14, the battery device being used to store electrical energy.

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