Battery device and electric equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a battery device and electric equipment. In the embodiment of the invention, the sampling assembly comprises the sampling piece and the buckling piece, the confluence piece is provided with the clamping cavity, the sampling piece is inserted into the clamping cavity, and the buckling piece is matched with a bayonet in the clamping cavity in a buckling manner, so that the sampling piece can be protected by utilizing the clamping cavity, and the sampling piece and the confluence piece are detachably connected; therefore, the reliability and the maintainability of the sampling piece can be improved. The buckling piece is arranged on at least one side, except the first side and the second side, of the sampling piece, and the bayonet at least can limit the degree of freedom of the buckling piece in the first direction, so that when the sampling piece is subjected to external acting force in the first direction, the risk that the buckling piece is separated from the bayonet can be reduced, and the stability of the whole structure can be improved; and the reliability of the sampling piece can be further improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to battery devices and electrical equipment. Background Art

[0002] During the use of the battery device, the voltage, temperature and other usage parameters of the battery cells in the battery device need to be monitored through the sampling device. The reliability of the sampling device will directly affect the monitoring process of the battery cells. Therefore, how to enhance the reliability of the relevant sampling device is an urgent problem to be solved in battery technology. Utility Model Content

[0003] Based on this, the present application provides a battery device and an electrical device that can improve the reliability during the sampling process.

[0004] In a first aspect, the present application provides a battery device, comprising: a battery cell having a first surface and an electrode terminal arranged on the first surface; a busbar connected to the electrode terminal; the busbar having a snap-fit ​​cavity, an inner wall of which is provided with a snap-fit ​​port; and a sampling assembly, comprising a sampling piece and a snap-fitting piece provided on the sampling piece, the sampling piece being inserted into the snap-fitting cavity, the snap-fitting piece snap-fitting with the snap-fitting port; wherein the sampling piece has a first side and a second side arranged opposite to each other along a first direction, the first side being arranged facing the first surface; a snap-fitting piece is provided on at least one side of the sampling piece except the first side and the second side, and the snap-fitting piece is constructed to at least be able to limit the degree of freedom of the snap-fitting piece in the first direction.

[0005] In the technical solution of the embodiment of the present application, by setting the sampling component to include a sampling piece and a snap-on piece, setting the conduit piece to have a snap-on cavity, and allowing the sampling piece to be inserted into the snap-on cavity, the snap-on piece and the snap-on socket in the snap-on cavity snap-on fit, so that the snap-on cavity can be used to protect the sampling piece and realize the detachable connection between the sampling piece and the conduit piece, thereby improving the reliability and maintainability of the sampling piece. By setting the snap-on piece on at least one side of the sampling piece other than the first side and the second side, and the snap-on socket at least being able to limit the degree of freedom of the snap-on piece in the first direction, when subjected to an external force in the first direction, the risk of the snap-on piece coming out of the snap-on socket can be reduced, thereby improving the stability of the overall structure, and thereby further improving the reliability of the sampling piece.

[0006] In some embodiments, the snap-fit ​​cavity has an opening, and the sampling piece is inserted into the snap-fit ​​cavity through the opening; at least one of the two sides of the sampling piece that are oppositely arranged in the first preset direction is provided with a snap fit; the opening direction, the first preset direction and the first direction intersect each other.

[0007] In this way, when the sampling piece is inserted into the snap-fitting cavity, the snap-fitting piece can be snap-fitted with the snap-fitting opening in the snap-fitting cavity, thereby achieving relatively quick installation. Since the snap-fitting piece is provided on at least one side of the sampling piece along the first preset direction, the movement of the sampling piece along the opening direction can be limited, so that the position of the sampling piece in the snap-fitting cavity is more stable, thereby increasing the reliability of the connection of the sampling piece.

[0008] In some embodiments, the buckle includes a first section and a second section connected to each other; in an initial state of the buckle, at least a portion of the first section and the second section are accommodated in the buckle socket, and a deformable space is defined between the first section and the second section.

[0009] In this way, by providing a deformable space, the buckle has a certain elastic deformation ability, and can achieve a tighter buckle fit with the bayonet. When subjected to external force, the buckle can be deformed in the deformable space to maintain the tight buckle state between the buckle and the bayonet, reducing the possibility of the buckle loosening and falling out of the bayonet due to external force, thereby enhancing the stability of the connection. At the same time, since the first section and the second section are in different positions, the buckle can be limited from different directions.

[0010] In some embodiments, the first section has a first end connected to the sampling piece, and a second end extending away from the sampling piece; the second section has a third end connected to the second end, and a fourth end opposite to the third end; the fourth end is closer to the sampling piece than the third end; in the initial state of the buckle, the first end and the fourth end are spaced apart from each other.

[0011] In this way, the first section and the second section roughly form a bent structure, which is conducive to the deformable space defined by the first section and the second section to absorb the force exerted on the sampling member.

[0012] In some embodiments, in the initial state of the buckle, along the opening direction of the opening, the second end is closer to the opening than the first end; and / or, in the initial state of the buckle, the direction pointing from the third end to the fourth end is parallel to the first preset direction; and / or, in the initial state of the buckle, the second section abuts against the inner wall of the bayonet; and / or, the first section is configured to have the freedom to swing elastically around the first end and can swing around the first axis, and the extension direction of the first axis is parallel to the first direction.

[0013] Since the second end is closer to the opening than the first end, the first section is arranged substantially tilted. In the process of inserting the sampling piece into the snap-fit ​​cavity through the opening, it is advantageous to accommodate at least part of the first section and the second section in the snap-fit ​​cavity by means of the deformation of the first section. When the sampling piece is subjected to an external force, the first section is less likely to fall out of the snap-fit ​​cavity. Since the direction from the third end to the fourth end is parallel to the first preset direction, when the sampling piece is subjected to an external force, the second section can abut against the inner wall of the snap-fit ​​cavity to a greater extent, thereby increasing the contact area between the snap-fit ​​cavity and the inner wall of the snap-fit ​​cavity, and making the snap-fitting of the snap-fit ​​cavity and the snap-fit ​​cavity more stable and reliable. Since the second section abuts against the inner wall of the snap-fit ​​cavity in the initial state of the snap-fitting cavity, the snap-fitting of the snap-fit ​​cavity and the snap-fit ​​cavity is more stable and reliable. Since the first section has the freedom to swing elastically around the first end, and the swing is around the first axis, when the sampling piece is inserted into the snap-fit ​​cavity through the opening, it is beneficial for the first section to approach the sampling piece under the pressure of the inner wall of the snap-fit ​​cavity, and when it reaches the snap-fit ​​position, it can slide into the snap-fit ​​more smoothly, thereby facilitating the installation of the sampling piece on the conduit.

[0014] In some embodiments, the snap-fit ​​member further includes a third section connected to the fourth end; a side of the snap-fit ​​member is provided on the sampling member, defining a gap with the inner wall of the snap-fit ​​cavity; and the gap of the third section fits into the corresponding gap.

[0015] In this way, by arranging the third section in the corresponding gap, and the third section being able to move in the gap, when the sampling piece is subjected to external force, the third section can be deformed with the help of the gap, and provide deformation margin for the deformation of the first section and the second section, so that the first section and the second section can be further extended into the bayonet, thereby improving the stability of the snap fit.

[0016] In some embodiments, the third section has a fifth end connected to the fourth end, and a sixth end arranged opposite to the fifth end; the third section extends in a straight line from the fifth end to the sixth end; and / or, in the initial state of the buckle, the third section abuts against the inner wall of the snap-fit ​​cavity.

[0017] Since the third section is extended in a straight line and connected to the fourth end, it is not only conducive to setting the required gap and improving the space utilization rate inside the clamping cavity, but also facilitates the first section and the second section to enter the clamping port when the sampling piece is inserted into the clamping cavity through the opening. Since the third section abuts against the inner wall of the clamping cavity in the initial state of the buckle, the connection between the sampling piece and the confluence piece is more stable.

[0018] In some embodiments, the bayonet penetrates the cavity wall of the bayonet cavity along a first preset direction.

[0019] In this way, since the bayonet penetrates the cavity wall of the snap-fit ​​cavity, a larger deformation space can be provided for the first section and the second section during the deformation process, thereby facilitating improving the stability of the snap fit between the snap member and the bayonet.

[0020] In some embodiments, both sides of the sampling member that are opposite to each other along the first preset direction are provided with snap fasteners; the snap fasteners located on the two sides of the sampling member that are opposite to each other along the first preset direction are symmetrically arranged about the central axis of the opening.

[0021] In this way, by symmetrically arranging the snap fasteners on the opposite sides of the sampling piece, it is not only helpful to improve the stability of the connection between the sampling piece and the manifold, but also helpful to facilitate the insertion of the sampling piece into the snap-fit ​​cavity, thereby facilitating the installation of the sampling piece.

[0022] In some embodiments, the sampling component further includes a buffer; the buffer is disposed on at least one of the first side and the second side of the sampling component.

[0023] In this way, by arranging a buffer member on the sampling member, when the sampling member is subjected to a force in the first direction or a component force in other directions in the first direction, the corresponding force can be buffered and absorbed, thereby improving the stability and reliability of the connection between the sampling member and the conduit member.

[0024] In some embodiments, at least part of the buffer is located in the card connection cavity; the card connection cavity has two first inner walls arranged opposite to each other along the first direction; the buffer and the sampling member together form a combination, and the combination abuts against the two first inner walls one by one on both sides along the first direction.

[0025] In this way, by respectively contacting the two sides of the assembly in the first direction with the inner wall of the clamping cavity, the connection between the sampling member and the flow collector is made more stable. At the same time, since the buffer member has a certain buffering capacity, it is also convenient to remove the sampling member from the flow collector.

[0026] In some embodiments, the buffer member includes a first portion connected to the sampling member and a second portion abutting against the corresponding first inner wall; the first portion and the second portion are connected; along the first direction, the first portion is spaced apart from the corresponding first inner wall, and the second portion is spaced apart from the sampling member.

[0027] In this way, the first part and the second part substantially form a bending structure, so that the bending structure can gradually absorb and disperse the force, thereby further improving the stability and reliability of the connection between the sampling member and the confluence member.

[0028] In some embodiments, the buffer comprises a plurality of first portions spaced apart along a second preset direction, and at least one second portion is provided; a second portion is connected between two adjacent first portions; and the second preset direction and the first direction intersect with each other.

[0029] In this way, a plurality of bending structures can be formed on the buffer component, which prolongs the absorption path of the force and increases the dispersion level of the force, thereby further increasing the buffering capacity of the buffer component.

[0030] In some embodiments, the side of the first side and the second side where the buffer is disposed is defined as the target side; for the same target side, a plurality of buffers are disposed, and the plurality of buffers are disposed at intervals.

[0031] In this way, by providing a plurality of buffer members arranged at intervals, not only can the buffering capacity be improved, but also the forces applied to different parts can be buffered. Since there are intervals between the plurality of buffer members, the intervals are also conducive to releasing the forces.

[0032] In some embodiments, the buffer is constructed as a sheet; and / or the buffer is configured to be elastic; and / or the material of the buffer is configured to be a conductive material.

[0033] Thus, by constructing the buffer as a sheet, it is beneficial for the buffer to deform when subjected to a force. By configuring the buffer to be elastic, the elastic property can be used for buffering, making the buffering process smoother, which is beneficial to improving the stability of the overall structure. By configuring the material of the buffer to be a conductive material, it is beneficial to increase the flow area of ​​the sampling piece, thereby improving the service life and accuracy of the sampling piece.

[0034] In some embodiments, a plurality of battery cells are provided; the busbar includes a first connection portion, a second connection portion, and a third connection portion connecting the first connection portion and the second connection portion; the first connection portion and the second connection portion are respectively connected to the electrode terminals of two adjacent battery cells in a one-to-one correspondence, the third connection portion is recessed toward the battery cell, and a snap-in cavity is provided on the third connection portion.

[0035] In this way, by configuring the collector to include a third connection portion that is relatively recessed and providing a snap-in cavity on the third connection portion, it is not only convenient to install the sampling member, but also beneficial to improve the space utilization rate in the battery device.

[0036] In some embodiments, the snap member and the sampling member are integrally formed; and / or, the snap member is constructed as a sheet; and / or, the snap member is configured to be elastic; and / or, the material of the snap member is configured to be a conductive material.

[0037] In this way, since the buckle and the sampling piece are integrally formed, it is not only easy to manufacture, but also conducive to improving the structural strength of the overall structure. At this time, the buckle and the sampling piece are made of the same material, and the buckle is also conductive, which is conducive to further improving the flow area. By constructing the buckle as a sheet, it is conducive to buckling the buckle in the bayonet by virtue of the deformation of the buckle. By configuring the buckle to be elastic, it is conducive to buckling the buckle in the bayonet by virtue of the elastic deformation of the buckle.

[0038] In some embodiments, the sampling component further includes a sampling circuit board, and the sampling member is electrically connected to the sampling circuit board.

[0039] In this way, by setting up a sampling circuit board, the voltage, current, temperature and other parameters of the battery cell can be monitored with the help of the sampling circuit board.

[0040] In a second aspect, the present application provides an electrical device, comprising the battery device in any of the above embodiments.

[0041] The advantages possessed by the battery device in any of the above embodiments are also possessed by the electrical equipment, which will not be elaborated here.

[0042] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the embodiments below. The accompanying drawings are only for the purpose of illustrating the embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0044] Figure 1 A schematic diagram of the structure of a vehicle in some embodiments of the present application;

[0045] Figure 2 is a schematic diagram of the exploded structure of a battery device in some embodiments of the present application;

[0046] Figure 3 A schematic diagram of the exploded structure of a battery cell in some embodiments of the present application;

[0047] Figure 4 It is a three-dimensional structural schematic diagram of a partial structure of a battery cell, a current collector and a sampling assembly in some embodiments of the present application;

[0048] Figure 5It is a schematic diagram of a top view of a partial structure of a battery cell, a current collector and a sampling assembly in some embodiments of the present application;

[0049] Figure 6 It is a schematic diagram of the three-dimensional structure of the matching of the confluence member and the sampling member in some embodiments of the present application;

[0050] Figure 7 It is a partial cross-sectional structural schematic diagram of the matching of the current collecting member and the sampling member in some embodiments of the present application;

[0051] Figure 8 for Figure 7 A schematic diagram of the local enlarged structure at point A in the middle;

[0052] Fig. 9 It is a schematic diagram of the exploded structure of the current collector and the sampling member in some embodiments of the present application;

[0053] Fig.10 A schematic diagram of a part of the structure of a sampling assembly in some embodiments of the present application at a viewing angle;

[0054] Fig.11 for Figure 8 A schematic diagram of the local enlarged structure at B in the middle;

[0055] Fig.12 It is a schematic structural diagram of a part of the sampling assembly in some embodiments of the present application from another perspective;

[0056] Fig.13 for Fig.12 Schematic diagram of the local enlarged structure at G in the middle;

[0057] Fig.14 It is a schematic cross-sectional structure diagram of the sampling member and the clamping cavity in some embodiments of the present application;

[0058] Fig.15 for Fig.14 Schematic diagram of the local enlarged structure at H in the middle.

[0059] Description of reference numerals:

[0060] Vehicle 1;

[0061] Battery device 10, controller 20, motor 30;

[0062] Battery cell 100, housing 110, end cover 120, first surface m1, electrode terminal et, electrode assembly 130;

[0063] Box body 200, first part 210, second part 220;

[0064] The manifold 300 , the first connection portion 310 , the second connection portion 320 , the third connection portion 330 , the clamping cavity Q, the first inner wall n1 , the clamping port k, and the opening u;

[0065] Sampling assembly 400, sampling member 410, first side c1, second side c2, buckle member 420, first section 421, first end e1, second end e2, second section 422, third end e3, fourth end e4, third section 423, fifth end e5, sixth end e6, deformable space E, buffer member 430, first part 431, second part 432, sampling circuit board 440;

[0066] A first preset direction Y1, a second preset direction Y2;

[0067] The first direction F1, the second direction F2, and the third direction F3. DETAILED DESCRIPTION

[0068] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0070] 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 "multiple" is more than two, unless otherwise clearly and specifically defined.

[0071] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0072] 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, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0073] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0074] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0075] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0076] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0077] The battery device mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery device mentioned in the present application may include a battery module or a battery pack.

[0078] The battery device may include a housing for encapsulating one or more battery cells. The battery device may not include a housing. For example, multiple battery cells may be connected in series, in parallel, or in a mixed connection and placed in a housing. For another example, multiple battery cells may be connected in series, in parallel, or in a mixed connection to obtain a battery module, and the battery module is placed in a housing. During the use of the battery device, it is necessary to monitor the voltage, temperature, and other usage parameters of the battery cells through a sampling device, and the reliability of the sampling device will directly affect the monitoring process of the battery cells.

[0079] Based on this, in order to improve the reliability during the sampling process, the embodiment of the present application provides a battery device, which improves the reliability during the sampling process by improving the installation method between the sampling member and the busbar. Specifically, the sampling member and the busbar are detachably connected by a snap-fit ​​method, and the relevant snap-fit ​​method is configured to at least limit the degree of freedom of the sampling member in the first direction, so as to improve the reliability and maintainability of the sampling member, thereby improving the reliability during the sampling process.

[0080] The battery disclosed in the embodiment of the present application can be used in, but not limited to, electrical equipment such as vehicles, ships or aircraft. The power supply system of the electrical equipment can be composed of the battery disclosed in the present application and other components, which is conducive to improving the reliability of the sampling process.

[0081] The embodiment of the present application provides an electric device using a battery device as a power source, and the electric device is a device that uses electric energy as an energy source and realizes corresponding functions by consuming electric energy. Exemplarily, the electric device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0082] The electric device of the embodiment of the present application may include a device body and a power supply device, the power supply device is used to supply power to the device body, and the power supply device may include a battery cell or a battery pack. The device body refers to a main structure that consumes electric energy to achieve corresponding functions. For example, the electric device may be a mobile phone, the device body is the part that can achieve functions such as communication, and the battery cell or battery pack is used to supply power to the part that can achieve functions such as communication. For example, the electric device may be a car, the device body is the part that can be used for people to sit and can be driven on the road, and the battery cell or battery pack is used to supply power to the part that can be used for people to sit and can be driven on the road. The power supply device refers to a device that can output electric energy. Exemplarily, electric energy can be output by a battery pack composed of battery cells.

[0083] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0084] Please refer to Figure 1 , Figure 1 Schematic diagram of the structure of vehicle 1 in some embodiments of the present application. Vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 10 is provided inside the vehicle 1, and the battery device 10 can be provided at the bottom, head or tail of the vehicle 1. The battery device 10 can be used to power the vehicle 1. For example, the battery device 10 can be used as an operating power source for the vehicle 1. The vehicle 1 can also include a controller 20 and a motor 30. The controller 20 is used to control the battery device 10 to power the motor 30, for example, for the starting, navigation and working power requirements of the vehicle 1 during driving.

[0085] In some embodiments of the present application, the battery device 10 can not only serve as an operating power source for the vehicle 1 , but also serve as a driving power source for the vehicle 1 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1 .

[0086] In order to meet different power requirements, the battery device 10 may include a plurality of battery cells 100, where a battery cell 100 refers to the smallest unit that constitutes a battery module or a battery pack. A plurality of battery cells 100 can be connected in series and / or in parallel via electrode terminals et for use in various applications. The batteries mentioned in the present application include battery modules or battery packs. Among them, a plurality of battery cells 100 can be connected in series, in parallel, or in mixed connection, where mixed connection refers to a mixture of series and parallel connection. The battery device 10 may also be referred to as a battery pack. In the embodiments of the present application, a plurality of battery cells 100 may directly constitute a battery pack, or may first constitute a battery module, which may then constitute a battery pack.

[0087] Please refer to Figure 2 , Figure 2 It is a schematic diagram of the exploded structure of the battery device 10 in some embodiments of the present application. Figure 2 In the embodiment, the battery device 10 may include a plurality of battery modules and a case 200, and the plurality of battery modules are contained inside the case 200. The case 200 is used to contain the battery cells 100 to prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells 100. The case 200 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, which is not limited in the embodiments of the present application. The material of the case 200 may be an alloy material such as aluminum alloy, iron alloy, etc., or a polymer material such as polycarbonate, polyisocyanurate foam plastic, or a composite material such as glass fiber and epoxy resin, which is not limited in the embodiments of the present application.

[0088] In some embodiments, the box body 200 may include a first portion 210 and a second portion 220, the first portion 210 and the second portion 220 cover each other, and the first portion 210 and the second portion 220 jointly define a space for accommodating the battery cell 100. The second portion 220 may be a hollow structure with one end open, and the first portion 210 may be a plate-like structure, and the first portion 210 covers the open side of the second portion 220, so that the first portion 210 and the second portion 220 jointly define a space for accommodating the battery cell 100. The first portion 210 and the second portion 220 may also be hollow structures with one side open, and the open side of the first portion 210 covers the open side of the second portion 220.

[0089] The battery module may include a plurality of battery cells 100, and the plurality of battery cells 100 may be first connected in series or in parallel or in a mixed connection to form a battery module, and the plurality of battery modules may then be connected in series or in parallel or in a mixed connection to form a battery. In the present application, the battery cell 100 may include a lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc., which is not limited in the embodiments of the present application. The battery cell 100 may be in a cylindrical, flat, rectangular or other shape, which is not limited in the embodiments of the present application. The battery cell 100 may be in a cylindrical, flat, rectangular or other shape, which is not limited in the embodiments of the present application. However, for the sake of simplicity of description, the following embodiments are all described using a cubic square battery cell 100 as an example.

[0090] Please refer to Figure 3 , Figure 3 1 is a schematic diagram of the exploded structure of a battery cell 100 in some embodiments of the present application. The battery cell 100 refers to the smallest unit constituting the battery device 10. Figure 3 The battery cell 100 includes a housing 110 , an end cover 120 , an electrode assembly 130 and other functional components.

[0091] The shell 110 is a component used to cooperate with the end cap 120 to form the internal environment of the battery cell 100, wherein the formed internal environment can be used to accommodate the electrode assembly 130, the electrolyte (not shown in the figure) and other components. The shell 110 and the end cap 120 can be independent components, and an opening can be set on the shell 110, and the internal environment of the battery cell 100 is formed by covering the opening with the end cap 120 at the opening. Without limitation, the end cap 120 and the shell 110 can also be integrated. Specifically, the end cap 120 and the shell 110 can form a common connection surface before other components are put into the shell, and when the interior of the shell 110 needs to be encapsulated, the end cap 120 covers the shell 110. The shell 110 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 110 can be determined according to the specific shape and size of the electrode assembly 130. The shell 110 may be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which is not particularly limited in the present embodiment. The opening of the shell 110 may be located at the side or bottom of the shell 110, which is not limited in the present embodiment.

[0092] The end cap 120 refers to a component that can be covered on the opening of the shell 110 to isolate the internal environment of the battery cell 100 from the external environment. Without limitation, the shape of the end cap 120 can be adapted to the shape of the shell 110 to match the shell 110. Optionally, the end cap 120 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 120 is not easily deformed when it is squeezed and collided, so that the battery cell 100 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals et can be provided on the end cap 120. The electrode terminal et can be used to electrically connect to the electrode assembly 130 for outputting or inputting electrical energy of the battery cell 100. In some embodiments, the end cap 120 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 100 reaches a threshold. In some embodiments, the end cap 120 can also be provided with a liquid injection hole for injecting electrolyte into the interior of the battery cell 100. The material of the end cap 120 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose special restrictions on this. In some embodiments, an insulating member can also be provided on the inner side of the end cap 120, and the insulating member can be used to isolate the electrical connection components in the housing 110 from the end cap 120 to reduce the risk of short circuit. Exemplarily, the material of the insulating member can be plastic, rubber, etc. In some embodiments, a pressure relief mechanism can also be provided on the housing 110 and / or the end cap 120. The pressure relief mechanism is used to release the internal pressure when the internal pressure or temperature of the battery cell 100 reaches a threshold value to improve the safety performance of the battery cell 100. The threshold design varies according to different design requirements. The threshold may depend on one or more materials in the electrode assembly 130 and the isolation member in the battery cell 100. The pressure relief mechanism may take the form of an explosion-proof valve, an air valve, a pressure relief valve or a safety valve, and may specifically adopt a pressure-sensitive or temperature-sensitive element or structure, that is, when the internal pressure or temperature of the battery cell 100 reaches a threshold value, the pressure relief mechanism executes an action or a weak structure provided in the pressure relief mechanism is destroyed, thereby forming an opening or channel for the internal pressure or temperature to be released.

[0093] The electrode assembly 130 is a component in the battery cell 100 where an electrochemical reaction occurs. One or more electrode assemblies 130 may be included in the housing 110. The electrode assembly 130 is mainly formed by winding or stacking 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 parts of the positive electrode sheet and the negative electrode sheet with active materials constitute the main body of the electrode assembly 130, and the parts of the positive electrode sheet and the negative electrode sheet without active materials each constitute a pole ear (not shown in the figure). The positive pole ear and the negative pole ear may be located together at one end of the main body or at both ends of the main body, may be located at the top of the main body, or may be located on the side wall of the main body, and no specific restrictions are made here. During the charge and discharge process of the battery device 10, the positive electrode active material and the negative electrode active material react with the electrolyte, and the pole ear connects the electrode terminal et to form a current loop. The separator is used to isolate the positive electrode sheet and the negative electrode sheet, and prevent the electrons in the battery cell 100 from passing freely, so that the ions in the electrolyte flow freely between the positive electrode sheet and the negative electrode sheet. The spacer may be a film made of materials such as PE (polyethylene) and PP (polypropylene).

[0094] According to some embodiments of this application, please continue to refer to Figure 3 , and combined with reference Figure 4 and Figure 5 , Figure 4 It is a three-dimensional structural diagram of a partial structure of a battery cell 100, a current collector 300 and a sampling assembly 400 in some embodiments of the present application. Figure 5 The top view of the structure of the battery cell 100, the current collector 300 and the sampling assembly 400 in some embodiments of the present application is a schematic diagram of the partial structure of the battery cell 100, the current collector 300 and the sampling assembly 400. The battery device 10 includes the battery cell 100, the current collector 300 and the sampling assembly 400. Figure 5 The perspective is Figure 4 A top-down perspective from the perspective shown in FIG.

[0095] The battery cell 100 has a first surface m1 and an electrode terminal et disposed on the first surface m1. Figure 3 The first surface m1 is a side surface of the end cover 120 that is away from the housing 110 . Of course, in some other embodiments, the first surface m1 may also be a side surface of the housing 110 .

[0096] The busbar 300 is a component for electrically connecting to the battery cell 100. Specifically, the busbar 300 can be used to electrically connect the electrode terminals et of two adjacent battery cells 100 to connect multiple battery cells 100 in series, in parallel or in a mixed manner. The busbar 300 can also electrically connect the electrode terminals et of the battery cell 100 and the components of the external electrical device to electrically conduct the external electrical device and the battery device 10. The busbar 300 is made of a conductive material, and the conductive material may be, but is not limited to, copper or aluminum; wherein the material of the busbar 300 and the electrode terminal et may be the same or different. The busbar 300 may be, but is not limited to, a bar sheet. The connection method between the busbar 300 and the electrode terminal et may be, but is not limited to, bolt connection, bonding, clamping, riveting, sleeve connection, welding, one-piece molding, etc. Among them, one-piece molding refers to molding using one-piece processes such as extrusion, injection molding, and die casting. The number and arrangement of the busbars 300 may be set according to the electrical connection method required for the plurality of battery cells 100 , and are not specifically limited herein.

[0097] Combined with reference Figures 6 to 8 , Figure 6 Schematic diagram of the three-dimensional structure of the matching of the current collector 300 and the sampling member 410 in some embodiments of the present application. Figure 7 It is a partial cross-sectional structural diagram of the matching of the current collector 300 and the sampling member 410 in some embodiments of the present application. Figure 8 for Figure 7 In the partial enlarged structural diagram at A in the middle, the confluence piece 300 has a snap-in cavity Q, and a snap-in k is provided on the inner wall of the snap-in cavity Q. The snap-in cavity Q may be provided on the confluence piece 300, or a component having the snap-in cavity Q may be integrally connected to the confluence piece 300. As long as the confluence piece 300 has the snap-in cavity Q, no specific limitation is made here. Among them, the snap-in k is a port connected to the snap-in cavity Q, and the depth and size of the snap-in k can be determined according to the snap-in piece 420 in the sampling assembly 400 illustrated later.

[0098] Continue to combine references Figures 6 to 8 The sampling assembly 400 includes a sampling member 410 and a snap member 420 disposed on the sampling member 410. The sampling member 410 is inserted into the snap-fitting cavity Q, and the snap member 420 snaps into engagement with the bayonet k. The sampling member 410 has a first side c1 and a second side c2 disposed opposite to each other along a first direction F1, and the first side c1 is disposed facing the first surface m1. The snap member 420 is disposed on at least one side of the sampling member 410 other than the first side c1 and the second side c2, and the bayonet k is configured to at least limit the degree of freedom of the snap member 420 in the first direction F1.

[0099] The sampling member 410 is a conductive member, for example, the material of the sampling member 410 can be a conductive material such as nickel. The sampling member 410 can be used to collect relevant data (such as voltage, etc.) of the battery cell 100. The buckle member 420 is a member used to realize a buckle function with other members.

[0100] Exemplary, with reference to Figure 4 , the first direction F1 is the height direction of the battery cell 100, the second direction F2 is the length direction of the battery cell 100, and the third direction F3 is the width direction of the battery cell 100, and the first direction F1, the second direction F2 and the third direction F3 are perpendicular to each other. It can be understood that this is only an exemplary description, but is not limited to this. For example, in some other embodiments, the second direction F2 may be the width direction of the battery cell 100, and the third direction F3 may be the length direction of the battery cell 100. The size of the battery cell 100 along the second direction F2 and the size along the third direction F3 may be the same or different. At least one side of the sampling member 410 other than the first side c1 and the second side c2 is provided with a snap member 420, that is, in combination with reference Figure 5 , Figure 5 The dotted line indicates the position of the snapping member 420. The snapping member 420 may be provided on at least one of the two sides of the sampling member 410 along the third direction F3, or on one side of the sampling member 410 along the second direction F2, or on both sides of the sampling member 410 along the third direction F3 and on one side along the second direction F2. No specific limitation is made here.

[0101] By configuring the sampling assembly 400 to include a sampling member 410 and a snap member 420, configuring the confluence member 300 to have a snap-fitting cavity Q, and allowing the sampling member 410 to be inserted into the snap-fitting cavity Q, the snap member 420 and the snap-fitting k in the snap-fitting cavity Q are snap-fitted, so that the snap-fitting cavity Q can be used to protect the sampling member 410 and realize the detachable connection between the sampling member 410 and the confluence member 300, thereby improving the reliability and maintainability of the sampling member 410. By configuring the snap member 420 on at least one side of the sampling member 410 other than the first side c1 and the second side c2, and the snap-fitting k at least being able to limit the degree of freedom of the snap member 420 in the first direction F1, when subjected to an external force in the first direction F1, the risk of the snap member 420 coming out of the snap-fitting k can be reduced, thereby improving the stability of the overall structure, thereby further improving the reliability of the sampling member 410.

[0102] It can be understood that if the snap member 420 is provided on at least one of the first side c1 and the second side c2 of the sampling member 410, the snap member 420 is easy to come out when the sampling member 410 is subjected to the force in the first direction F1, and the space of the corresponding bayonet k is also limited due to the space in the first direction F1, which further leads to the reliability of the snap fit between the snap member 420 and the bayonet k being reduced. In addition, when the sampling member 410 needs to be disassembled, it is also limited by the space in the first direction F1 and is difficult to disassemble. In the embodiment of the present application, the snap member 420 is provided on at least one side of the sampling member 410 except the first side c1 and the second side c2, which not only does not need to be limited by the space in the first direction F1, but also can improve the situation of the snap member 420 coming out of the bayonet k when subjected to the force in the first direction F1. Therefore, the installation method of the sampling member 410 provided in the embodiment of the present application is more stable and reliable, which is conducive to improving the reliability during the sampling process and is also conducive to disassembling the sampling member 410.

[0103] According to some embodiments of this application, please continue to refer to Figures 6 to 8 , and combined with reference Fig. 9 , Fig. 9 Schematic diagram of the exploded structure of the confluence member 300 and the sampling member 410 in some embodiments of the present application, the clamping cavity Q has an opening u, and the sampling member 410 is inserted into the clamping cavity Q through the opening u. At least one of the two sides of the sampling member 410 that are oppositely arranged in the first preset direction Y1 is provided with a buckle 420. The opening direction of the opening u, the first preset direction Y1, and the first direction F1 intersect each other.

[0104] Exemplary, with reference to Figure 5 In the embodiment of the present application, the first preset direction Y1 and the third direction F3 are parallel to each other, the opening direction of the opening u is parallel to the second direction F2, and the opening direction of the opening u, the first preset direction Y1 and the first direction F1 are perpendicular to each other. Fig. 9 , the sampling member 410 can be inserted into the clamping cavity Q through the opening u along the opening direction of the opening u. Figure 8 and Fig. 9 For example, the sampling member 410 is provided with the buckle member 420 on both sides of the first preset direction Y1. Of course, the sampling member 410 may also be provided with the buckle member 420 on one side of the first preset direction Y1.

[0105] In this way, when the sampling member 410 is inserted into the snap-fitting cavity Q, the snap-fitting member 420 can snap-fit ​​with the snap-fitting port k in the snap-fitting cavity Q, thereby achieving relatively quick installation. Since the snap-fitting member 420 is disposed on at least one side of the sampling member 410 in the first preset direction Y1, the movement of the sampling member 410 along the opening direction of the opening u can be limited, so that the position of the sampling member 410 in the snap-fitting cavity Q is more stable, and the reliability of the connection is higher.

[0106] According to some embodiments of this application, please continue to refer to Figure 8 , and combined with reference Fig.10 and Fig.11 , Fig.10 This is a schematic diagram of a part of the structure of the sampling component 400 in some embodiments of the present application at a viewing angle. Fig.11 for Figure 8 In the schematic diagram of the partially enlarged structure at point B, the buckle 420 includes a first section 421 and a second section 422 that are connected to each other. In the initial state of the buckle, at least parts of the first section 421 and the second section 422 are accommodated in the bayonet k, and a deformable space E is defined between the first section 421 and the second section 422.

[0107] The deformable space E refers to an area inside or between components, in which the components of the component can change shape, size or structure under certain external forces. The deformable space E is a relatively flexible area, which provides the possibility for the deformation of the component under certain external forces.

[0108] At least part of the first section 421 and the second section 422 are accommodated in the bayonet k, which means that at least part of the first section 421 and at least part of the second section 422 are accommodated in the bayonet k. Fig.11 As an example, it illustrates the situation where a portion of the first section 421 and a portion of the second section 422 are accommodated in the bayonet k in the initial state of the buckle.

[0109] The initial state of the buckle refers to the state of the buckle 420 when the buckle 420 is installed in the bayonet k and is not subjected to external forces. At this time, the buckle 420 is buckled with the bayonet k. Since the deformable space E is defined between the first section 421 and the second section 422, when the buckle 420 is subjected to external forces, the buckle 420 can be deformed with the help of the deformable space E. At this time, the first section 421 and the second section 422 may be close to each other, so that the deformable space E is deformed, or the first section 421 and the second section 422 themselves are deformed, so that the deformable space E is deformed. It can be determined according to the specific structure of the first section 421 and the second section 422, and no specific restrictions are made here. Among them, the external force can be the expansion force of the battery cell 100, or it can be the force generated by the vibration of the battery device 10 subjected to the external force, and no specific restrictions are made here.

[0110] When no external force is applied, the buckle 420 can continue to be in the initial buckle state. When an external force is applied, the deformable space E may or may not be deformed according to the magnitude of the external force. In the case where the deformable space E is deformed by the external force, as the external force gradually increases, the size of the deformable space E may be reduced or remain unchanged according to the structure of the first section 421 and the second section 422. For example, under a certain external force, the first section 421 and the second section 422 may fit together. Of course, the deformable space E may also exist all the time, and no specific limitation is made here.

[0111] In this way, by providing the deformable space E, the buckle 420 has a certain elastic deformation ability, and can achieve a tighter buckle fit with the bayonet k. When subjected to external force, the buckle 420 can be deformed in the deformable space E to maintain the tight buckle state between the buckle 420 and the bayonet k, reducing the possibility of the buckle 420 loosening and falling out of the bayonet k due to external force, thereby enhancing the stability of the connection. At the same time, since the first section 421 and the second section 422 are in different positions, the buckle 420 can be limited from different directions.

[0112] According to some embodiments of this application, please continue to refer to Fig.11 The first section 421 has a first end e1 connected to the sampling member 410, and a second end e2 extending away from the sampling member 410. The second section 422 has a third end e3 connected to the second end e2, and a fourth end e4 opposite to the third end e3. The fourth end e4 is closer to the sampling member 410 than the third end e3. In the initial state of the buckle, the first end e1 and the fourth end e4 are spaced apart from each other.

[0113] Since the second end e2 of the first section 421 and the third end e3 of the second section 422 are connected, the first end e1 of the first section 421 and the fourth end e4 of the second section 422 are spaced apart from each other, so that the deformable space E defined by the first section 421 and the second section 422 has a mouth formed at the first end e1 and the fourth end e4, and the first section 421 and the second section 422 roughly form a bending structure. In this way, when the buckle 420 is subjected to an external force, the first end e1 and the fourth end e4 can be brought close to each other by means of the mouth formed at the first end e1 and the fourth end e4, so that the deformable space E is deformed. Furthermore, when subjected to a greater external force, the first section 421 and the second section 422 themselves can also be further deformed to further absorb the force applied to the sampling member 410.

[0114] In this way, since the first section 421 and the second section 422 roughly form a bending structure, different degrees of forces can be absorbed, which is beneficial for the deformable space E to absorb the force exerted on the sampling member 410, thereby improving the connection reliability between the sampling member 410 and the busbar 300.

[0115] According to some embodiments of this application, please continue to refer to Fig.11 , in the initial state of the buckle, along the opening direction of the opening u, the second end e2 is closer to the opening u than the first end e1; and / or, in the initial state of the buckle, the direction of the third end e3 pointing to the fourth end e4 is parallel to the first preset direction Y1; and / or, in the initial state of the buckle, the second section 422 abuts against the inner wall of the bayonet k; and / or, the first section 421 is configured to have the freedom to swing elastically around the first end e1, and can swing around the first axis, and the extension direction of the first axis is parallel to the first direction F1.

[0116] Since the second end e2 is closer to the opening u than the first end e1, the first section 421 is substantially inclined. When the sampling member 410 is inserted into the engaging cavity Q through the opening u, the first section 421 is deformed to allow at least a portion of the first section 421 and the second section 422 to be accommodated in the bayonet k. When the sampling member 410 is subjected to an external force, the first section 421 is less likely to be dislodged from the bayonet k. Since the direction from the third end e3 to the fourth end e4 is parallel to the first preset direction Y1, when the sampling member 410 is subjected to an external force, the second section 422 can abut against the inner wall of the bayonet k to a greater extent, thereby increasing the contact area between the buckle 420 and the inner wall of the bayonet k, and making the buckle fit between the buckle 420 and the bayonet k more stable and reliable. Since the second section 422 abuts against the inner wall of the bayonet k in the initial state of the buckle, the buckle fit between the buckle 420 and the bayonet k is more stable and reliable. Since the first section 421 can swing elastically around the first end e1 and the swing is around the first axis, when the sampling member 410 is inserted into the clamping cavity Q through the opening u, the first section 421 is facilitated to approach the sampling member 410 under the pressure of the inner wall of the clamping cavity Q, and when it reaches the position of the clamping port k, it slides into the clamping port k more smoothly, thereby facilitating the installation of the sampling member 410 on the confluence member 300. Therefore, the reliability of the sampling member 410 can be further improved through the mutual cooperation of the above-mentioned situations.

[0117] According to some embodiments of this application, please continue to refer to Fig.11 The snap-fit ​​member 420 further includes a third section 423 connected to the fourth end e4. The sampling member 410 is provided with a side of the snap-fit ​​member 420, which defines a gap with the inner wall of the snap-fit ​​cavity Q. The third section 423 is gap-fitted in the corresponding gap.

[0118] In this way, by arranging the third section 423 in the corresponding gap and the third section 423 being able to move in the gap, when the sampling member 410 is subjected to an external force, the third section 423 can be deformed by means of the gap, and provide a deformation margin for the deformation of the first section 421 and the second section 422, so that the first section 421 and the second section 422 can be further extended into the bayonet k, thereby improving the stability of the snap fit. For example, when subjected to the expansion force of the battery cell 100, the sampling member 410 is subjected to a force that pulls the sampling member 410 out of the snap-fit ​​cavity Q. At this time, the third section 423 can be used to supplement the deformation of the deformable space E, so that the first section 421 and the second section 422 extend deeper at the bayonet k, and a more secure snap fit is achieved.

[0119] According to some embodiments of this application, please continue to refer to Fig.11The third section 423 has a fifth end e5 connected to the fourth end e4, and a sixth end e6 arranged opposite to the fifth end e5; the third section 423 extends in a straight line from the fifth end e5 to the sixth end e6; and / or, in the initial state of the buckle, the third section 423 abuts against the inner wall of the buckle cavity Q.

[0120] Since the third section 423 is extended in a straight line and connected to the fourth end e4, it is not only conducive to setting the required gap and improving the space utilization rate inside the clamping cavity Q, but also facilitates the first section 421 and the second section 422 to enter the clamping port k during the process of the sampling member 410 being inserted into the clamping cavity Q through the opening u. Since the third section 423 abuts against the inner wall of the clamping cavity Q in the initial state of the buckle, the connection between the sampling member 410 and the confluence member 300 is more stable.

[0121] Of course, in some other embodiments, the third section 423 may be extended from the fifth end e5 to the sixth end e6 along the curve direction, which is not specifically limited herein.

[0122] According to some embodiments of this application, please continue to refer to Fig.11 The bayonet k penetrates the cavity wall of the clamping cavity Q along the first preset direction Y1.

[0123] In this way, since the bayonet k penetrates the cavity wall of the snap-fitting cavity Q, a larger deformation space can be provided for the first section 421 and the second section 422 during the deformation process, thereby facilitating the improvement of the stability of the snap-fitting between the snap-fitting member 420 and the bayonet k. It can be understood that when the sampling member 410 needs to be disassembled, if the snap-fitting member 420 is deformed, the sampling member 410 can be disassembled with the aid of the bayonet k that penetrates the cavity wall of the snap-fitting cavity Q, making the disassembly process easier.

[0124] Of course, in some other embodiments, the bayonet k may not penetrate the cavity wall of the snap-fit ​​cavity Q. The depth of the bayonet k may be determined according to the use process and is not specifically limited here.

[0125] According to some embodiments of this application, please continue to refer to Fig.10 The sampling member 410 is provided with buckle members 420 on both sides thereof which are arranged opposite to each other in the first preset direction Y1. The buckle members 420 on both sides thereof which are arranged opposite to each other in the first preset direction Y1 are symmetrically arranged about the central axis of the opening u.

[0126] Exemplarily, a central axis of the opening u and the second direction F2 are parallel to each other.

[0127] Thus, by symmetrically arranging the snap fasteners 420 on opposite sides of the sampling member 410, it is not only helpful to improve the stability of the connection between the sampling member 410 and the confluence member 300, but also helpful to facilitate the insertion of the sampling member 410 into the snap connection cavity Q, thereby facilitating the installation of the sampling member 410. In addition, symmetrically arranging the snap fasteners 420 also facilitates the processing and manufacturing of the snap fasteners 420.

[0128] According to some embodiments of this application, please continue to refer to Fig.10 , and combined with reference Fig.12 and Fig.13 , Fig.12 This is a schematic diagram of a part of the sampling assembly 400 in some embodiments of the present application from another perspective. Fig.13 for Fig.12 In the partial enlarged structural diagram at G in the middle, the sampling assembly 400 further includes a buffer 430. The buffer 430 is disposed on at least one of the first side c1 and the second side c2 of the sampling member 410.

[0129] The buffer 430 is a component used to play the role of buffering, shock absorption, energy absorption, etc. The buffer 430 can reduce the adverse effects of impact force, vibration, etc. on related components through its own characteristics. When the sampling piece 410 and the confluence piece 300 are subjected to an action force, the buffer 430 can absorb and disperse the impact force, so that the impact process becomes relatively mild, reducing the damage to the sampling piece 410 and the confluence piece 300. The buffering effect can be achieved by configuring the material of the buffer 430 or the structure of the buffer 430. For example, the material of the buffer 430 can be an elastic material. For another example, the structure of the buffer 430 includes a stress dispersion structure, a stress absorption structure, and the like. As long as the buffer 430 can be used to play a buffering role, no specific limitation is made here.

[0130] Thus, by providing the buffer member 430 on the sampling member 410, when the sampling member 410 is subjected to a force in the first direction F1 or a force in other directions in the first direction F1, the corresponding force can be buffered and absorbed, thereby improving the stability and reliability of the connection between the sampling member 410 and the busbar 300.

[0131] According to some embodiments of this application, please continue to refer to Fig.12 and Fig.13 , and combined with reference Fig.14 and Fig.15 , Fig.14 Schematic diagram of the cross-sectional structure of the sampling member 410 and the card connection cavity Q in some embodiments of the present application. Fig.15 for Fig.14In the partial enlarged structural diagram at H in the middle, at least part of the buffer 430 is located in the clamping cavity Q, and the clamping cavity Q has two first inner walls n1 arranged opposite to each other along the first direction F1. The buffer 430 and the sampling member 410 form a combination, and the combination abuts against the two first inner walls n1 one by one along both sides of the first direction F1.

[0132] For example, Figures 12 to 15 For example, the buffer 430 is arranged on the second side c2 of the sampling member 410, and the side of the buffer 430 facing away from the sampling member 410 abuts against one of the first inner walls n1, and the first side c1 of the sampling member 410 abuts against the other first inner wall n1. In the case where the buffer 430 is arranged on both the first side c1 and the second side c2 of the sampling member 410, the side of the buffer 430 arranged on the first side c1 abuts against one of the first inner walls n1, and the side of the buffer 430 arranged on the second side c2 abuts against the other first inner wall n1. The abutting relationship between the combination formed by the buffer 430 and the sampling member 410 can be understood according to the specific structural form of the combination formed by the buffer 430 and the sampling member 410, and no specific limitation is made here.

[0133] Thus, the connection between the sampling member 410 and the flow collector 300 is more stable by respectively contacting the two sides of the assembly in the first direction F1 with the inner wall of the clamping cavity Q. At the same time, since the buffer member 430 has a certain buffering capacity, it is also convenient to remove the sampling member 410 from the flow collector 300.

[0134] According to some embodiments of this application, please continue to refer to Fig.13 and Fig.15 The buffer member 430 includes a first portion 431 connected to the sampling member 410 and a second portion 432 abutting against the corresponding first inner wall n1. The first portion 431 and the second portion 432 are connected. Along the first direction F1, the first portion 431 is spaced apart from the corresponding first inner wall n1, and the second portion 432 is spaced apart from the sampling member 410.

[0135] Since there is a gap between the first portion 431 and the corresponding first inner wall n1, and there is a gap between the second portion 432 and the sampling member 410, the first portion 431 and the second portion 432 are not aligned in the first direction F1, and the first portion 431 and the second portion 432 roughly form a bending structure, so that the bending structure can gradually absorb and disperse the force, thereby further improving the stability and reliability of the connection between the sampling member 410 and the busbar 300.

[0136] According to some embodiments of this application, please continue to refer to Fig.13 and Fig.15The buffer member 430 includes a plurality of first portions 431 spaced apart along the second preset direction Y2, and at least one second portion 432. A second portion 432 is connected between two adjacent first portions 431. The second preset direction Y2 intersects with the first direction F1.

[0137] For example, Fig.15 For example, in the case where the buffer member 430 includes two first portions 431 and one second portion 432 , the second preset direction Y2 and the first direction F1 are perpendicular to each other.

[0138] In this way, a plurality of bending structures can be formed on the buffer member 430 , which prolongs the absorption path of the force and increases the dispersion level of the force, thereby further increasing the buffering capacity of the buffer member 430 .

[0139] According to some embodiments of this application, please continue to refer to Fig.10 The side of the first side c1 and the second side c2 where the buffer 430 is provided is defined as the target side. For the same target side, a plurality of buffers 430 are provided, and the plurality of buffers 430 are arranged at intervals.

[0140] Thus, by providing a plurality of buffer members 430 arranged at intervals, not only can the buffering capacity be improved, but also the forces applied to different parts can be buffered. Since there are intervals between the plurality of buffer members 430, the intervals are also conducive to releasing the forces.

[0141] Of course, in some other embodiments, the buffer component 430 may also be arranged outside the card connection cavity Q, and the buffer component 430 may also be arranged at one end of the sampling component 410 inserted into the card connection cavity Q. The above-mentioned multiple buffer components 430 may also be connected to each other and may be arranged according to specific usage conditions, and no specific restrictions are made here.

[0142] According to some embodiments of this application, please continue to refer to Fig.10 , Fig.13 and Fig.15 , the buffer member 430 is constructed as a sheet; and / or, the buffer member 430 is configured to be elastic; and / or, the material of the buffer member 430 is configured to be a conductive material.

[0143] Thus, by configuring the buffer 430 as a sheet, it is advantageous for the buffer 430 to perform buffering by deformation when subjected to an applied force. By configuring the buffer 430 to be elastic, the elastic property can be utilized for buffering, making the buffering process smoother, which is advantageous for improving the stability of the overall structure. By configuring the material of the buffer 430 to be a conductive material, it is advantageous for increasing the flow area of ​​the sampling member 410, thereby improving the service life and accuracy of the sampling member 410.

[0144] According to some embodiments of this application, please continue to refer to Figure 4 and Figure 7 , a plurality of battery cells 100 are provided. The busbar 300 includes a first connection portion 310, a second connection portion 320, and a third connection portion 330 connecting the first connection portion 310 and the second connection portion 320. The first connection portion 310 and the second connection portion 320 are respectively connected to the electrode terminals et of two adjacent battery cells 100 in a one-to-one correspondence, and the third connection portion 330 is recessed toward the battery cell 100, and a clamping cavity Q is provided on the third connection portion 330.

[0145] In this way, by configuring the busbar 300 to include a relatively recessed third connection portion 330 and providing a snap-in cavity Q on the third connection portion 330 , it is not only convenient to install the sampling member 410 , but also beneficial to improve the space utilization rate in the battery device 10 .

[0146] According to some embodiments of this application, please continue to refer to Fig.10 , the snap member 420 and the sampling member 410 are integrally formed; and / or, the snap member 420 is constructed as a sheet; and / or, the snap member 420 is configured to be elastic; and / or, the material of the snap member 420 is configured to be a conductive material.

[0147] In this way, since the snap fastener 420 and the sampling member 410 are integrally formed, it is not only easy to manufacture, but also conducive to improving the structural strength of the overall structure. At this time, the snap fastener 420 and the sampling member 410 are made of the same material, and the snap fastener 420 is also conductive, which is conducive to further improving the flow area. By constructing the snap fastener 420 as a sheet, it is conducive to snapping the snap fastener 420 into the bayonet k by virtue of the deformation of the snap fastener 420. By configuring the snap fastener 420 to be elastic, it is conducive to snapping the snap fastener 420 into the bayonet k by virtue of the elastic deformation of the snap fastener 420.

[0148] Of course, in some other embodiments, the buckle 420 can be connected to the sampling member 410 by means of gluing, welding or fusion, etc., which is not specifically limited here. In some other embodiments, the buckle 420 can also be constructed in other shapes such as strips, which is not specifically limited here. In some other embodiments, the buckle 420 may not be elastic, and the buckle 420 may not be conductive, which is not specifically limited here.

[0149] According to some embodiments of this application, please continue to refer to Figure 4 and Figure 5 The sampling assembly 400 further includes a sampling circuit board 440, and the sampling member 410 is electrically connected to the sampling circuit board 440. Exemplarily, the sampling circuit board 440 may be a flexible printed circuit board (FPC).

[0150] Thus, by setting up the sampling circuit board 440, the voltage, current, temperature and other parameters of the battery cell 100 can be monitored with the help of the sampling circuit board 440. It can be understood that when the sampling circuit board 440 is damaged and needs to be replaced, since the sampling component 410 and the busbar 300 are detachably connected, the sampling component 410 can be removed from the busbar 300, thereby facilitating the replacement of the sampling circuit board 440 and reducing the difficulty of repairing the sampling circuit board 440.

[0151] According to some embodiments of the present application, an electric device is provided in the embodiments of the present application, including the battery device 10 in any of the above embodiments. The battery device 10 is used to power the electric device. The electric device can be any of the above-mentioned devices or systems using the battery device 10. The advantages possessed by the battery device 10 in any of the above embodiments are also possessed by the electric device, which will not be repeated here.

[0152] According to some embodiments of this application, please refer to Figures 4 to 15The battery device 10 includes a battery cell 100, a busbar 300 and a sampling assembly 400. The battery cell 100 has a first surface m1 and an electrode terminal et provided on the first surface m1. The busbar 300 is connected to the electrode terminal et, and the busbar 300 has a snap-fit ​​cavity Q, and a snap-fit ​​k is provided on the inner wall of the snap-fit ​​cavity Q, and the snap-fit ​​k penetrates the cavity wall of the snap-fit ​​cavity Q along the first preset direction Y1, and the snap-fit ​​cavity Q has an opening u. The sampling assembly 400 includes a sampling member 410, a snap-fit ​​member 420 provided on both sides of the sampling member 410 along the first preset direction Y1, a buffer member 430 provided on the first side c1 of the sampling member 410, and a sampling circuit board 440 electrically connected to the sampling member 410. The snap-fit ​​member 420 and the sampling member 410 are an integrally formed member, and the snap-fit ​​member 420 is constructed as a sheet member and is configured to be elastic and conductive. The sampling member 410 is inserted into the snap-fitting cavity Q through the opening u, and the snap-fitting member 420 snaps into engagement with the snap-fitting port k. The snap-fitting port k is constructed to at least limit the degree of freedom of the snap-fitting member 420 in the first direction F1. The snap-fitting member 420 includes a first section 421, a second section 422, and a third section 423. The first section 421 has a first end e1 connected to the sampling member 410, and a second end e2 extending away from the sampling member 410. The second section 422 has a third end e3 connected to the second end e2, and a fourth end e4 opposite to the third end e3. The fourth end e4 is closer to the sampling member 410 than the third end e3. The third section 423 has a fifth end e5 connected to the fourth end e4, and a sixth end e6 opposite to the fifth end e5. The third section 423 extends in a straight line from the fifth end e5 to the sixth end e6. In the initial state of the buckle, the first end e1 and the fourth end e4 are spaced apart from each other, the second end e2 is closer to the opening u than the first end e1, the second section 422 abuts against the inner wall of the bayonet k, the third section 423 abuts against the inner wall of the bayonet cavity Q, at least part of the first section 421 and the second section 422 are accommodated in the bayonet k, and a deformable space E is defined between the first section 421 and the second section 422. The buffer member 430 includes a first portion 431 connected to the sampling member 410, and a second portion 432 abutting against the corresponding first inner wall n1. The first portion 431 and the second portion 432 are connected. Along the first direction F1, the first portion 431 is spaced apart from the corresponding first inner wall n1, and the second portion 432 is spaced apart from the sampling member 410. The buffer member 430 is constructed as a sheet member and is configured to be elastic and conductive.

[0153] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery device (10), characterized in that: include: A battery cell (100) having a first surface (m1) and an electrode terminal (et) disposed on the first surface (m1); A busbar (300) connected to the electrode terminal (et); the busbar (300) has a snap-fit ​​cavity (Q), and a snap-fit ​​port (k) is provided on the inner wall of the snap-fit ​​cavity (Q); and A sampling assembly (400) comprises a sampling piece (410) and a buckle piece (420) arranged on the sampling piece (410), wherein the sampling piece (410) is inserted into the buckle cavity (Q), and the buckle piece (420) is buckled with the bayonet (k); The sampling member (410) comprises a first side (c1) and a second side (c2) which are arranged opposite to each other along a first direction (F1), and the first side (c1) is arranged facing the first surface (m1); at least one side of the sampling member (410) other than the first side (c1) and the second side (c2) is provided with the snap member (420), and the snap member (k) is constructed to at least be able to limit the degree of freedom of the snap member (420) in the first direction (F1).

2. The battery device (10) according to claim 1, characterized in that: The card connection cavity (Q) has an opening (u), and the sampling member (410) is inserted into the card connection cavity (Q) via the opening (u); The sampling member (410) is provided with the locking member (420) on at least one of the two sides that are arranged opposite to each other in the first preset direction (Y1); the opening direction of the opening (u), the first preset direction (Y1) and the first direction (F1) intersect each other.

3. The battery device (10) according to claim 2, characterized in that: The buckle (420) comprises a first section (421) and a second section (422) connected to each other; In the initial state of the buckle, at least parts of the first section (421) and the second section (422) are accommodated in the buckle port (k), and a deformable space (E) is defined between the first section (421) and the second section (422).

4. The battery device (10) according to claim 3, characterized in that: The first section (421) has a first end (e1) connected to the sampling member (410), and a second end (e2) extending away from the sampling member (410); the second section (422) has a third end (e3) connected to the second end (e2), and a fourth end (e4) opposite to the third end (e3); the fourth end (e4) is closer to the sampling member (410) than the third end (e3); In the buckle initial state, the first end (e1) and the fourth end (e4) are spaced apart from each other.

5. The battery device (10) according to claim 4, characterized in that: In the initial state of the buckle, along the opening direction of the opening (u), the second end (e2) is closer to the opening (u) than the first end (e1); and / or In the initial state of the buckle, the direction from the third end (e3) to the fourth end (e4) is parallel to the first preset direction (Y1); and / or In the initial state of the buckle, the second section (422) abuts against the inner wall of the bayonet (k); and / or The first section (421) is configured to have the freedom to swing elastically around the first end (e1) and can swing around a first axis, and the extension direction of the first axis is parallel to the first direction (F1).

6. The battery device (10) according to claim 4, characterized in that The fastener (420) further includes a third section (423) connected to the fourth end (e4); The sampling member (410) is provided with a side of the snap member (420), defining a gap with the inner wall of the snap-fit ​​cavity (Q); the third section (423) is gap-fitted into the corresponding gap.

7. The battery device (10) according to claim 6, characterized in that The third section (423) has a fifth end (e5) connected to the fourth end (e4), and a sixth end (e6) arranged opposite to the fifth end (e5); the third section (423) extends from the fifth end (e5) to the sixth end (e6) along a straight line; and / or In the initial state of the buckle, the third section (423) abuts against the inner wall of the buckle cavity (Q).

8. The battery device (10) according to claim 3, characterized in that: The bayonet (k) penetrates the cavity wall of the engaging cavity (Q) along the first preset direction (Y1).

9. The battery device (10) according to claim 2, characterized in that: The sampling member (410) is provided with the snapping members (420) on two sides that are arranged opposite to each other along the first preset direction (Y1); The locking members (420) located on two opposite sides of the sampling member (410) along the first preset direction (Y1) are symmetrically arranged about the central axis of the opening (u).

10. The battery device (10) according to any one of claims 1 to 9, characterized in that: The sampling assembly (400) further includes a buffer (430); The buffer component (430) is disposed on at least one of the first side (c1) and the second side (c2) of the sampling component (410).

11. The battery device (10) according to claim 10, characterized in that At least a portion of the buffer member (430) is located in the clamping cavity (Q); the clamping cavity (Q) has two first inner walls (n1) arranged opposite to each other along the first direction (F1); The buffer member (430) and the sampling member (410) together form a combination, and the combination abuts against the two first inner walls (n1) in a one-to-one correspondence on both sides along the first direction (F1).

12. The battery device (10) according to claim 11, characterized in that The buffer member (430) comprises a first portion (431) connected to the sampling member (410), and a second portion (432) abutting against the corresponding first inner wall (n1); the first portion (431) and the second portion (432) are connected; Along the first direction (F1), the first portion (431) is spaced apart from the corresponding first inner wall (n1), and the second portion (432) is spaced apart from the sampling member (410).

13. The battery device (10) according to claim 12, characterized in that The buffer member (430) comprises a plurality of first portions (431) arranged at intervals along a second preset direction (Y2), and at least one second portion (432) is provided; A second portion (432) is connected between two adjacent first portions (431); and the second preset direction (Y2) and the first direction (F1) intersect with each other.

14. The battery device (10) according to claim 10, characterized in that: The side of the first side (c1) and the second side (c2) on which the buffer (430) is provided is defined as a target side; for the same target side, a plurality of buffers (430) are provided, and the plurality of buffers (430) are arranged at intervals.

15. The battery device (10) according to claim 10, characterized in that: The buffer member (430) is configured as a sheet-like member; and / or The buffer (430) is configured to be elastic; and / or The material of the buffer (430) is configured as a conductive material.

16. The battery device (10) according to any one of claims 1 to 9, characterized in that: A plurality of battery cells (100) are provided; the busbar (300) comprises a first connection portion (310), a second connection portion (320), and a third connection portion (330) connecting the first connection portion (310) and the second connection portion (320); The first connection part (310) and the second connection part (320) are respectively connected to the electrode terminals (et) of two adjacent battery cells (100) in a one-to-one correspondence, the third connection part (330) is recessed toward the battery cell (100), and the third connection part (330) is provided with the clamping cavity (Q).

17. The battery device (10) according to any one of claims 1 to 9, characterized in that: The buckle component (420) and the sampling component (410) are integrally formed; and / or The buckle (420) is configured as a sheet-like piece; and / or The buckle (420) is configured to be elastic; and / or The material of the buckle (420) is configured as a conductive material; and / or The sampling component (400) further comprises a sampling circuit board (440), and the sampling member (410) is electrically connected to the sampling circuit board (440).

18. An electrical equipment, characterized in that: Comprising the battery device (10) according to any one of claims 1 to 17.

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