Sampling assembly, battery module, battery and electric equipment

Abstract

The embodiment of the utility model provides a sampling assembly, a battery module, a battery and electric equipment. The service life of the sampling assembly can be prolonged. The sampling assembly is applied to the battery module comprising a confluence component, the sampling assembly comprises a main body structure, and at least part of the main body structure is used for being attached to the confluence component; one end of the sampling structure is connected with the attaching part of the main body structure, the other end of the sampling structure is used for being connected with the confluence component, and the attaching part is the part, attached to the confluence component, of the main body structure.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of batteries, and more specifically, to a sampling component, a battery module, a battery, and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. In this case, electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] With the development of battery technology, the performance of batteries is also constantly improving. Among them, the battery life is an important factor in measuring battery performance. The battery life depends on the life of the internal components of the battery. How to improve the life of the internal components of the battery is still a problem that needs to be solved. Utility Model Content

[0004] The embodiments of the present application provide a sampling component, a battery module, a battery and an electrical device, which can increase the life of the sampling component.

[0005] In a first aspect, a sampling assembly is provided, which is applied to a battery module including a convergence component, and the sampling assembly includes: a main structure, at least a portion of which is used to fit with the convergence component; a sampling structure, one end of which is connected to a fitting portion of the main structure, and the other end of which is used to connect with the convergence component, and the fitting portion is a portion of the main structure that fits with the convergence component.

[0006] In the sampling assembly provided in the embodiment of the present application, the main structure is usually an extremely thin sheet, one end of the sampling structure is arranged on the surface of the fitting portion of the main structure that is away from the battery cell, and the other end of the sampling structure is directly arranged on the surface of the confluence component that is away from the battery cell and is in contact with the confluence component. The surfaces where the two ends of the sampling structure are located are almost on the same plane, and stress concentration is not easy to occur at the positions where the two ends of the sampling structure contact the corresponding surfaces, thereby improving the life of the sampling assembly.

[0007] At the same time, both ends of the sampling structure are relatively fixed to the confluence component. During the actual use of the battery, this can reduce the possibility of the sampling structure breaking due to asynchronous vibration at both ends of the sampling structure, thereby increasing the life of the sampling component.

[0008] In some embodiments, the main structure includes a bearing portion and an extending portion, the extending portion is connected to the bearing portion, and the extending portion includes the fitting portion.

[0009] The bearing part can integrate multiple sampling structures together, which is conducive to the positioning of the sampling structure at the battery module level and can increase the accuracy of the sampling structure in collecting the parameters of the battery cell. At the same time, the extension part can span the height difference between the confluence component and the surface of the battery cell, and can also reduce the interference between the sampling component and the confluence component, making the internal structure layout of the battery more reasonable.

[0010] In some embodiments, the extension is a flexible component.

[0011] In this way, the extension part can span the height difference between the surface of the confluence component facing away from the battery cell and the plane where the bearing part is located, so that the sampling assembly can form a stable connection on the battery cell through the bearing part, and can also provide a connection area for the sampling structure on the confluence component. At the same time, the flexible connection between the fitting part and the bearing part can also absorb the vibration of the extension part between the confluence component and the battery cell surface, reducing the connection breakage caused by the asynchronous vibration of the confluence component and the battery cell surface.

[0012] In some embodiments, the extending portion is disposed on at least one edge of the carrying portion, and the extending portion extends in a direction away from the edge of the carrying portion 311 .

[0013] This is conducive to the reasonable arrangement of the bearing part and the collector component, fully utilizing the space inside the battery, and helping to improve the energy density of the battery.

[0014] In some embodiments, the supporting portion has a notch, the opening of the notch faces the flow collecting component, and the extending portion extends from the notch toward the flow collecting component.

[0015] The notch on the bearing portion can provide an escape space for the extension portion, thereby reducing the interference of the bearing portion on the extension portion, and at the same time provide space for the vibration of the extension portion, thereby reducing the influence of the vibration of the extension portion on the bearing portion.

[0016] In some embodiments, the extending portion and the bearing portion are integrally formed.

[0017] The one-piece molding structure can simplify the preparation process of the main structure, improve the accuracy of the main structure, and increase the connection strength between the extension part and the bearing part, making the extension part and the bearing part less likely to break.

[0018] In some embodiments, the sampling structure includes a sampling wire and a bonding disk, one end of the sampling wire is connected to the bonding portion through the bonding disk, and the other end of the sampling wire is connected to the conduit component.

[0019] The sampling structure realizes the connection between the sampling structure at the fitting part and the confluence component through the sampling wire and the bonding disk. On the one hand, it can improve the connection strength between the sampling wire and the fitting part and provide a more reliable connection for the sampling wire. On the other hand, it can protect the connection between the sampling wire and the fitting part, so that the connection between the sampling wire and the fitting part is not easy to break when the battery is shaken or collided, reducing the possibility of failure of the connection between the sampling wire and the fitting part.

[0020] In some embodiments, the bonding pad is disposed on the bonding portion.

[0021] The bonding disk is arranged at the bonding portion, which can protect the connection between the sampling wire and the bonding portion while reducing the coverage area of ​​the bonding disk, thereby reducing the preparation cost of the bonding disk.

[0022] In some embodiments, the fitting portion fits with the collecting component on a first side of the main structure and is connected to the sampling structure on a second side of the main structure, and the first side and the second side are two different sides of the main structure in the thickness direction.

[0023] Arranging the conduit component and the sampling structure on different sides of the fitting portion is beneficial to improving the stability of the connection between the fitting portion and the conduit component, reducing the possibility of asynchronous vibration between the fitting portion and the conduit component, thereby reducing the possibility of breakage of the connection point of the sampling structure and improving the life of the sampling structure.

[0024] In a second aspect, a battery module is provided, comprising: a plurality of battery cells, the plurality of battery cells being arranged along a first direction; a busbar component, the busbar component being used to electrically connect two adjacent battery cells; and a sampling component according to any one of the embodiments of the first aspect, the sampling component being used to sample the battery cells through the busbar component.

[0025] In some embodiments, the battery cell includes an end cover and a shell, the end cover is used to cover the shell; the main structure includes a bearing portion and an extension portion, the extension portion is connected to the bearing portion, the bearing portion is affixed to the end cover, and the extension portion includes the affixed portion.

[0026] The bearing portion fits well with the end cover of the battery cell, which can make the connection of the sampling assembly on the battery module more stable. At the same time, the extension portion extends toward the confluence component and connects the fitting portion with the surface of the confluence component, which can reduce the gap between the surfaces connected at the two ends of the sampling structure in the thickness direction of the main structure, so that the surfaces at the two ends of the sampling structure are almost in the same plane, and stress concentration is not easy to occur at the positions where the two ends of the sampling structure contact the corresponding surfaces, thereby improving the life of the sampling assembly.

[0027] In some embodiments, the battery module includes a plurality of the current collecting components, the main structure includes a plurality of the extension portions, the extension portions correspond to the current collecting components one by one, and the plurality of the extension portions are staggered in the first direction.

[0028] The extension portions are staggered on both sides of the bearing portion in the first direction, so that the stress distribution on the bearing portion is more uniform, which is beneficial to improving the strength of the sampling assembly, thereby increasing the life of the sampling assembly.

[0029] In a third aspect, a battery is provided, comprising: a battery module according to any embodiment of the second aspect.

[0030] In a fourth aspect, an electrical device is provided, comprising: a battery according to any embodiment of the third aspect, wherein the battery is used to provide electrical energy to the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0032] Figure 1 It is a structural schematic diagram of a vehicle provided in an embodiment of the present application.

[0033] Figure 2 It is a schematic diagram of the structure of a battery provided in an embodiment of the present application.

[0034] Figure 3 It is a structural schematic diagram of a battery module provided in an embodiment of the present application.

[0035] Figure 4 yes Figure 3 Schematic diagram of the structure of the sampling components and confluence components.

[0036] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure of part A.

[0037] In the drawings, the drawings are not drawn to scale.

[0038] The reference numerals in the specific implementation manner are as follows:

[0039] 1- Vehicle;

[0040] 10-battery, 80-controller, 90-motor;

[0041] 11-box, 111-first part, 112-second part;

[0042] 20-battery cell, 21-busbar component, 200-battery module;

[0043] 30 - sampling assembly, 31 - main structure, 310 - first area, 311 - bearing portion, 312 - extension portion, 313 - notch, 32 - sampling structure, 321 - sampling wire, 322 - bonding disk;

[0044] X-first direction, Y-second direction, Z-thickness direction. DETAILED DESCRIPTION

[0045] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0046] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly perpendicular, but within the tolerance range. "Parallel" is not strictly parallel, but within the tolerance range. All technical and scientific terms used in the present application have the same meaning as those generally understood by technicians in the technical field of the present application; the terms used in the present application and in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0047] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0048] Reference to "embodiments" in this application 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 in this application may be combined with other embodiments.

[0049] The term "multiple" as used in this application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0050] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0051] In the present application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, lithium metal batteries or magnesium-ion batteries, etc., and the embodiments of the present application do not limit this. Battery cells may be cylindrical, flat, rectangular or other shapes, etc., and the embodiments of the present application do not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the embodiments of the present application do not limit this.

[0052] The battery 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 mentioned in the present application may include a battery module or a battery pack. The battery generally includes a box for encapsulating one or more battery cells. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0053] During the use of the battery, in order to collect various parameters of the battery operation, a sampling component is usually set inside the battery. By connecting the sampling points in the sampling component to the electrode terminals of the battery cells, the operating data of each battery cell can be collected, thereby monitoring the operating status of the battery cell. However, the current sampling components are often set on the end caps of the battery cells, with one end of the sampling line connected to the electrode terminal and the other end connected to the pad on the sampling component. It is difficult for the electrode terminal and the pad to be in the same plane, which will result in a height difference between the two ends of the sampling line. The stress at the arc root at the lower end is concentrated, and it is easy to break, resulting in sampling failure.

[0054] In view of this, the embodiment of the present application provides a sampling assembly, wherein at least part of the main structure of the sampling assembly is bonded to the confluence component, one end of the sampling structure is connected to the confluence component, and the other end of the sampling structure is connected to the bonding portion on the main structure, wherein the bonding portion is the portion of the main structure that is bonded to the confluence component. In this way, the two ends of the sampling structure can be almost in the same plane, and stress concentration is not easily generated, thereby improving the life of the bonded sampling.

[0055] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using batteries. Electrical devices may be vehicles, energy storage devices, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and electric tools, etc. The vehicle may be a two-wheeled vehicle, a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc.; the energy storage device may be an energy storage uninterruptible power supply (UPS); the spacecraft includes aircraft, rockets, space shuttles and spacecraft, etc.; the electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; the electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc. The embodiments of the present application include but are not limited to the above-mentioned electrical devices.

[0056] For the convenience of description, the following embodiments are described by taking the electric device as a vehicle as an example.

[0057] like Figure 1 As shown, it is a structural schematic diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 90, a controller 80 and a battery 10 may be arranged inside the vehicle 1. The controller 80 is used to control the battery 10 to supply power to the motor 90. For example, a battery 10 may be arranged at the bottom, front or rear of the vehicle 1. The battery 10 may be used to supply power to the vehicle 1. For example, the battery 10 may be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power requirements during the start-up, navigation and operation of the vehicle 1. In another embodiment of the present application, the battery 10 may not only be used as an operating power source for the vehicle 1, but also 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.

[0058] In order to meet different power requirements, the battery may include multiple battery cells, wherein the multiple battery cells may be connected in series, in parallel, or in hybrid connection, where hybrid connection refers to a mixture of series and parallel connection. The battery may also be referred to as a battery pack. Optionally, multiple battery cells may be connected in series, in parallel, or in hybrid connection to form a battery module, and multiple battery modules may be connected in series, in parallel, or in hybrid connection to form a battery. In other words, multiple battery cells may be directly formed into a battery, or may be first formed into a battery module, and then the battery module may be formed into a battery.

[0059] For example, Figure 2 The schematic diagram of the structure of a battery 10 according to an embodiment of the present application is shown. The battery 10 may include at least one battery module 200. The battery module 200 includes a plurality of battery cells 20. The battery 10 may also include a box 11, the interior of the box 11 is a hollow structure, and the plurality of battery cells 20 are accommodated in the box 11. Figure 2 A possible implementation of the box 11 of the embodiment of the present application is shown, such as Figure 2 As shown, the box body 11 may include two parts, which are respectively referred to as a first part 111 and a second part 112, and the first part 111 and the second part 112 are buckled together. The shapes of the first part 111 and the second part 112 may be determined according to the shape of the battery module 200 combination, and at least one of the first part 111 and the second part 112 has an opening. For example, Figure 2 As shown, the first part 111 and the second part 112 can both be hollow rectangular parallelepipeds and each has only one open face, the opening of the first part 111 and the opening of the second part 112 are arranged opposite to each other, and the first part 111 and the second part 112 are interlocked to form a box body 11 with a closed chamber.

[0060] For example, unlike Figure 2 As shown, only one of the first part 111 and the second part 112 may be a hollow cuboid with an opening, while the other may be in the shape of a plate to cover the opening. For example, here, the second part 112 is a hollow cuboid with only one face as an opening face, and the first part 111 is in the shape of a plate. Then, the first part 111 covers the opening of the second part 112 to form a box 11 with a closed chamber, which can be used to accommodate multiple battery cells 20. Multiple battery cells 20 are connected in parallel, in series, or in a mixed combination and placed in the box 11 formed by the first part 111 and the second part 112 being buckled together.

[0061] Optionally, the battery 10 may also include other structures, which are not described one by one here. For example, the battery 10 may also include a busbar component, which is used to realize electrical connection between multiple battery cells 20, such as parallel connection, series connection, or mixed connection. Specifically, the busbar component can realize electrical connection between the battery cells 20 by connecting the electrode terminals of the battery cells 20. Further, the busbar component can be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of multiple battery cells 20 can be further led out through the conductive structure through the box body 11.

[0062] According to different power requirements, the number of battery cells 20 in the battery module 200 can be set to any value. Multiple battery cells 20 can be connected in series, parallel or mixed to achieve a larger capacity or power. Since the number of battery cells 20 included in each battery 10 may be large, in order to facilitate installation, the battery cells 20 are grouped and each group of battery cells 20 constitutes a battery module 200. The number of battery cells 20 included in the battery module 200 is not limited and can be set according to demand. The battery 10 may include multiple battery modules 200, which can be connected in series, parallel or mixed.

[0063] Taking the battery cells 20 connected in series as an example, Figure 3 A battery module 200 is shown, which includes a battery cell 20, a busbar 21, and a sampling assembly 30. The battery cells 20 are arranged along a first direction X, the busbar 21 is used to electrically connect two adjacent battery cells 20, and the sampling assembly 30 is connected to the busbar 21 to sample the battery cells 20. Figure 3 In the figure, the number of battery cells 20 is only used as an example and is not intended to be limiting.

[0064] Combine the following Figures 3 to 5 The sampling component 30 is introduced in detail. Figure 4 for Figure 3 The sampling assembly 30 and the confluence component 21, Figure 5 for Figure 4 The enlarged structural diagram of part A in FIG. Figures 3 to 5 As shown, the sampling assembly 30 is applied to the battery module 200 including the busbar component 21. The busbar component 21 and the sampling assembly 30 may be located on the same side of the battery cell 20, that is, on the same side of a battery cell group formed by a plurality of battery cells 20 arranged along the first direction X.

[0065] The sampling assembly 30 includes a main structure 31 and a sampling structure 32. At least a portion of the main structure 31 is used to fit with the confluence component 21. One end of the sampling structure 32 is connected to the fitting portion 310 of the main structure 31, and the other end is used to connect with the confluence component 21. The fitting portion 310 is the portion of the main structure 31 that fits with the confluence component 21.

[0066] The main structure 31 refers to a structure on the sampling assembly 30 for carrying the sampling structure 32. When the sampling assembly 30 includes multiple sampling structures 32, the main structure 31 can integrate the multiple sampling structures 32 on the same structure, which can simplify the production process of the battery during the assembly of the sampling assembly 30 with the battery. A circuit can usually be embedded in the main structure 31 for transmitting data.

[0067] The main structure 31 includes a fitting portion 310, which refers to the portion of the main structure 31 that fits with the current collector 21. Specifically, the surface of the fitting portion 310 facing the battery cell 20 fits with the current collector 21. In a possible implementation, the main structure 31 may also fit entirely with the current collector 21, and the fitting portion 310 is the main structure 31.

[0068] The sampling structure 32 refers to the part of the sampling assembly 30 used to collect parameters of the battery cell 20. In the embodiment of the present application, one end of the sampling structure 32 is connected to the fitting portion 310 of the main structure 31, wherein the fitting portion 310 is the part of the main structure 31 that fits the confluence component 21. In other words, this end of the sampling structure 32 is arranged in the fitting portion 310 of the main structure 31, and is indirectly arranged in the part of the confluence component 21 that fits the main structure 31. The sampling structure 32 can be specifically connected to the circuit embedded in the main structure 31, and the sampled parameters are transmitted to the corresponding processor through the circuit in the main structure 31, so that the processor can perform data processing.

[0069] The other end of the sampling structure 32 is connected to the busbar component 21, and the parameters of the battery cell 20 in the operating state are obtained by collecting the parameters on the busbar component 21. For example, the sampling structure 32 can collect parameters such as current, voltage, and temperature from the busbar component 21, and these parameters can be used as the parameters of the corresponding battery cell 20, or these parameters can be used as the basis for obtaining the corresponding parameters of the battery module 200.

[0070] In some embodiments, the sampling structure 32 may be connected to the surface of the fitting portion 310 facing the battery cell 20 , and optionally, may also be connected to the surface of the fitting portion 310 facing away from the current collecting component 21 .

[0071] Considering that the sampling assembly 30 generally includes a structure capable of conducting electricity, such as a circuit, in order to reduce the possibility of short circuit caused by the sampling assembly 30 when connected to multiple current collectors 21, a structure for insulation, such as an insulating layer, may be provided between the fitting portion 310 and the current collector 21. Specifically, when the sampling structure 32 is provided on the surface of the fitting portion 310 facing the battery cell 20, the structure for insulation may be provided between the sampling structure 32 and the current collector 21.

[0072] In the sampling assembly 30 provided in the embodiment of the present application, the main structure 31 is generally a very thin sheet, one end of the sampling structure 32 is arranged on the surface of the fitting portion 310 of the main structure 31 away from the battery cell 20, and the other end of the sampling structure 32 is directly arranged on the surface of the conduit component 21 away from the battery cell 20 and in contact with the conduit component 21, then the surfaces where the two ends of the sampling structure 32 are located are almost on the same plane, and stress concentration is not prone to occur at the positions where the two ends of the sampling structure 32 contact the corresponding surfaces, thereby improving the life of the sampling assembly 30.

[0073] At the same time, both ends of the sampling structure 32 are relatively fixed to the confluence component 21. In the actual use of the battery, this can reduce the possibility of the sampling structure 32 breaking due to the asynchronous vibration of the two ends of the sampling structure 32, thereby increasing the life of the sampling assembly 30.

[0074] According to some embodiments of the present application, the main structure 31 includes a bearing portion 311 and an extending portion 312 , the extending portion 312 is connected to the bearing portion 311 , and the extending portion 312 includes a fitting portion 310 .

[0075] like Figure 4 and Figure 5 As shown, the bearing portion 311 extends along the first direction X and refers to the portion of the main structure 31 fixedly connected to the battery cell 20 , and the extending portion 312 refers to the portion of the main structure 31 extending from the bearing portion 311 to the converging component 21 .

[0076] In some embodiments, the carrying portion 311 may be connected to the battery cell 20. Specifically, the carrying portion 311 may be disposed on the surface of the battery cell 20 at a position away from the current collecting component 21. Figure 4 As shown, the bearing portion 311 and the current collecting component 21 do not overlap in the thickness direction Z of the bearing portion 311. The bearing portion 311 is a part of the main structure 31, and the thickness direction Z of the bearing portion 311 is the same direction as the thickness direction Z of the main structure 31. In some embodiments, the bearing portion 311 and the current collecting component 21 can be disposed on the same side of the battery cell 20.

[0077] One end of the extension portion 312 is connected to the bearing portion 311, and the other end is connected to the current collector 21. The portion of the extension portion 312 connected to the current collector 21 is the fitting portion 310. The portion of the extension portion 312 between the fitting portion 310 and the bearing portion 311 may span the gap between the surface of the current collector 21 facing away from the battery cell 20 and the plane where the bearing portion 311 is located, and the portion of the extension portion 312 between the fitting portion 310 and the bearing portion 311 may not be fixedly connected to the battery cell 20.

[0078] The bearing portion 311 can integrate multiple sampling structures 32 together, which is conducive to positioning the sampling structure 32 at the battery module 200 level, and can increase the accuracy of the sampling structure 32 in collecting parameters of the battery cell 20. At the same time, the extension portion 312 can span the height difference between the confluence component 21 and the surface of the battery cell 20, and can also reduce the interference between the sampling assembly 30 and the confluence component 21, making the internal structure layout of the battery more reasonable.

[0079] According to some embodiments of the present application, the extension portion 312 is a flexible component.

[0080] A flexible component refers to a structure that can be bent to a certain extent without affecting the normal use of the structure, and can change its shape in different situations to adapt to changes in the environment. One end of the extension portion 312 is attached to the converging component 21 as the fitting portion 310, and the other end is connected to the bearing portion 311, so the portion of the extension portion 312 other than the fitting portion 310 can be flexible.

[0081] In some embodiments, the flexibility of a flexible printed circuit (FPC) can be used to make the extension part a flexible component. In some embodiments, other flexible materials can also be selected to make the portion of the extension part 312 between the fitting part 310 and the bearing part 311 flexible.

[0082] The portion of the extension portion 312 between the fitting portion 310 and the bearing portion 311 may not fit the surface of the battery cell 20, and the portion of the extension portion 312 between the fitting portion 310 and the bearing portion 311 may reduce the vibration of the sampling assembly 30, thereby playing a buffering role. In some embodiments, there may be a folding structure between the fitting portion 310 and the bearing portion 311, so that the portion of the extension portion 312 between the fitting portion 310 and the bearing portion 311 has a certain margin, which can also reduce the vibration of the sampling assembly 30 and play a buffering role.

[0083] In some embodiments, the bearing portion 311 is a thin sheet structure, and is disposed on the surface of the battery cell 20. In the thickness direction Z of the bearing portion 311, the surface of the converging component 21 away from the battery cell 20 is the surface where the converging component 21 is connected to the fitting portion 310, and the surface of the converging component 21 facing the battery cell 20 is connected to the battery cell 20. The bearing portion 311 of the main structure 31 is disposed on the surface of the battery cell 20, and the surface of the converging component 21 away from the battery cell 20 has a certain height difference with the plane where the bearing portion 311 is located.

[0084] In this way, the extension part 312 can span the height difference between the surface of the confluence component 21 facing away from the battery cell 20 and the plane where the bearing part 311 is located, so that the sampling assembly 30 can not only form a stable connection on the battery cell 20 through the bearing part 311, but also provide a connection area for the sampling structure 32 on the confluence component 21. At the same time, the flexible connection between the fitting part 310 and the bearing part 311 can also absorb the vibration of the extension part 312 between the confluence component 21 and the surface of the battery cell 20, and reduce the connection breakage caused by the asynchronous vibration of the confluence component 21 and the surface of the battery cell 20.

[0085] According to some embodiments of the present application, the extending portion 312 is disposed on at least one edge of the carrying portion 311 , and the extending portion 312 extends in a direction away from the edge of the carrying portion 311 .

[0086] like Figure 3 and Figure 4 As shown, the carrying portion 311 may extend along the first direction X, that is, the size of the carrying portion 311 in the first direction X is greater than the size of the carrying portion 311 in the second direction Y. The first direction X may be the direction in which the battery cells 20 are arranged. Figure 3 and Figure 4 In the illustrated embodiment, the busbars 21 connect adjacent battery cells 20 along the first direction X, so a group of battery cells 20 arranged along the first direction X may correspond to two groups of busbars 21 arranged along the first direction X, and the bearing portion 311 may be disposed between the two groups of busbars 21. In other words, the busbars 21 are located on both sides of the bearing portion 311 along the second direction Y, wherein the second direction Y is perpendicular to the first direction X.

[0087] The extension portion 312 extends from the edge of the carrying portion 311 to a direction away from the edge of the carrying portion 311 , and the direction may be the second direction Y. In some embodiments, the extension portion 312 may be disposed at one edge of the carrying portion 311 , or at two opposite edges of the carrying portion 311 .

[0088] This is conducive to the reasonable arrangement between the bearing portion 311 and the collector component 21, fully utilizing the space inside the battery, and helping to improve the energy density of the battery.

[0089] According to some embodiments of the present application, the supporting portion 311 has a notch 313 , the opening of the notch 313 faces the flow-collecting component 21 , and the extending portion 312 extends from the notch 313 toward the flow-collecting component 21 .

[0090] like Figure 5 As shown, the notch 313 of the bearing portion 311 is arranged at the edge of the bearing portion 311, and is arranged corresponding to the extension portion 312. The notch 313 opens toward the converging component 21, and the extension portion 312 extends from the notch 313 toward the converging component 21. The portion of the extension portion 312 other than the fitting portion 310 can be in a suspended state to absorb the deformation caused by the asynchronous vibration between the converging component 21 and the bearing portion 311. At the same time, the notch 313 can also provide space for the vibration of the extension portion 312, thereby reducing the influence of the vibration of the extension portion 312 on the bearing portion 311.

[0091] The notch 313 of the carrying portion 311 can increase the length of the extending portion 312 in the second direction Y. When the extending portion 312 spans the gap between the collector component 21 and the carrying portion 311 , the notch 313 can provide an escape space for the extending portion 312 .

[0092] The notch 313 on the bearing portion 311 can provide an escape space for the extension portion 312 , thereby reducing the interference of the bearing portion 311 on the extension portion 312 , and at the same time provide space for the vibration of the extension portion 312 , thereby reducing the influence of the vibration of the extension portion 312 on the bearing portion 311 .

[0093] According to some embodiments of the present application, the extension portion 312 and the bearing portion 311 are an integrally formed structure.

[0094] The extension part 312 and the bearing part 311 can be made of the same material by an integrated molding process to prepare the main structure 31 of the sampling assembly 30. In the integrated molding structure, there is no additional connection structure at the connection between the extension part 312 and the bearing part 311, and there will be no failure of the connection structure, thus improving the connection strength between the extension part 312 and the bearing part 311.

[0095] The one-piece molding structure can simplify the preparation process of the main structure 31, improve the accuracy of the main structure 31, and improve the connection strength between the extension part 312 and the bearing part 311, so that the extension part 312 and the bearing part 311 are not easy to break.

[0096] According to some embodiments of the present application, the sampling structure 32 includes a sampling wire 321 and a bonding disk 322 , one end of the sampling wire 321 is connected to the bonding portion 310 through the bonding disk 322 , and the other end of the sampling wire 321 is connected to the confluence component 21 .

[0097] like Figure 4 and Figure 5 As shown, the sampling wire 321 in the sampling structure 32 can bridge the flow conduit component 21 and the main structure 31 .

[0098] A bonding disk 322 is provided at one end of the sampling wire 321, and the bonding disk 322 can connect one end of the sampling wire 321 to the bonding portion 310 of the main structure 31. Specifically, at the portion where the sampling wire 321 is connected to the bonding portion 310, the bonding disk 322 covers the surface of the sampling wire 321.

[0099] The other end of the sampling wire 321 is connected to the confluence component 21 to collect relevant parameters on the confluence component 21. For example, the sampling wire 321 can collect parameters such as current and voltage flowing through the confluence component 21, and can measure the temperature on the confluence component 21.

[0100] The sampling wire 321 can be connected to the circuit embedded in the main structure 31 to transmit the parameters sampled on the confluence component 21 to the processor through the circuit in the main structure 31 for processing.

[0101] The sampling structure 32 is connected to the fitting portion 310 and the conduit component 21 through the sampling wire 321 and the bonding disk 322. On the one hand, the connection strength between the sampling wire 321 and the fitting portion 310 can be improved to provide a more reliable connection for the sampling wire 321. On the other hand, the connection between the sampling wire 321 and the fitting portion 310 can be protected, so that the connection between the sampling wire 321 and the fitting portion 310 is not easy to break when the battery is shaken or collided, thereby reducing the possibility of failure of the connection between the sampling wire 321 and the fitting portion 310.

[0102] According to some embodiments of the present application, the bonding pad 322 is disposed on the bonding portion 310 .

[0103] In some embodiments, the sampling wire 321 is disposed on the fitting portion 310 of the main structure 31, and the bonding disk 322 is disposed corresponding to the sampling wire 321, and can also be disposed on the surface of the fitting portion 310. The bonding disk 322 can be disposed on at least a portion of the surface of the fitting portion 310, for example, the bonding disk 322 can only cover the position where the sampling wire 321 is located, or the bonding disk 322 can also cover the surface of the fitting portion 310 connected with the sampling wire 321.

[0104] The bonding disk 322 is disposed on the bonding portion 310 , which can protect the connection between the sampling wire 321 and the bonding portion 310 while reducing the coverage area of ​​the bonding disk 322 , thereby reducing the preparation cost of the bonding disk 322 .

[0105] According to some embodiments of the present application, the fitting portion 310 is fitted to the conduit component 21 on a first side of the main structure 31 and connected to the sampling structure 32 on a second side of the main structure 31 . The first side and the second side are different sides of the main structure 31 in the thickness direction Z.

[0106] The fitting portion 310 is a part of the main structure 31. In the thickness direction Z of the main structure 31, the confluence component 21 and the sampling structure 32 can be respectively arranged on both sides of the fitting portion 310. Specifically, the first side of the main structure 31 refers to the side of the main structure 31 facing the battery cell 20, and the second side of the main structure 31 refers to the side of the main structure 31 facing away from the battery cell 20. The sampling structure 32 is arranged on the second side of the fitting portion 310, so that the fitting portion 310 can be relatively flatly fitted with the confluence component 21 on the first side, and the fitting portion 310 and the confluence component 21 can be connected as a whole. When the confluence component 21 vibrates, the fitting portion 310 can keep consistent with the vibration of the confluence component 21.

[0107] Furthermore, one end of the sampling structure 32 is connected to the fitting portion 310, and the fitting portion 310 is connected to the confluence component 21 as a whole, so it can be considered that this end of the sampling structure 32 is connected to the confluence component 21 as a whole, and the vibration of the sampling structure 32 at this end can be consistent with that of the confluence component 21. The other end of the sampling structure 32 is directly connected to the confluence component 21, so the vibration of the sampling structure 32 at this end can also be consistent with that of the confluence component 21. Therefore, both ends of the sampling structure 32 can be consistent with the vibration of the confluence component 21, thereby improving the stability of the connection of the sampling structure 32 to the fitting portion 310 and the confluence component 21.

[0108] The arrangement of the conduit component 21 and the sampling structure 32 on different sides of the fitting portion 310 is beneficial to improving the stability of the connection between the fitting portion 310 and the conduit component 21, reducing the possibility of asynchronous vibration between the fitting portion 310 and the conduit component 21, thereby reducing the possibility of breakage of the connection point of the sampling structure 32 and improving the life of the sampling structure 32.

[0109] The present application also provides a battery module 200, such as Figures 3 to 5 As shown, it includes a plurality of battery cells 20, a busbar 21 and a sampling assembly 30 described in any of the above embodiments. The plurality of battery cells 20 are arranged along a first direction X, the busbar 21 is used to electrically connect two adjacent battery cells 20, and the sampling assembly 30 is used to sample the battery cells 20 through the busbar 21.

[0110] According to some embodiments of the present application, the battery cell 20 includes an end cover and a shell, the end cover is used to cover the shell; the main structure 31 includes a load-bearing portion 311 and an extension portion 312, the extension portion 312 is connected to the load-bearing portion 311, the load-bearing portion 311 is bonded to the end cover, and the extension portion 312 includes a bonding portion 310.

[0111] Each battery cell 20 in the battery module 200 includes an end cap and a shell. The end cap covers the shell so that the battery cell 20 is a sealed whole. The confluence component 21 is arranged on the end cap of the battery cell 20 to achieve electrical connection between adjacent battery cells 20. The bearing portion 311 on the sampling assembly 30 extends along the first direction X and fits with the end caps of multiple battery cells 20 arranged along the first direction X. Figure 3 As shown, the bearing portion 311 is staggered with the current collecting component 21 on the surface of the battery cell 20 , and the extension portion 312 extends from the edge of the bearing portion 311 to the current collecting component 21 , and the fitting portion 310 of the extension portion 312 is connected to the current collecting component 21 .

[0112] The bearing portion 311 fits well with the end cover of the battery cell 20, so that the connection of the sampling assembly 30 on the battery module 200 can be more stable. At the same time, the extension portion 312 extends toward the confluence component 21 and connects the fitting portion 310 to the surface of the confluence component 21, which can reduce the gap between the surfaces connected at the two ends of the sampling structure 32 in the thickness direction Z of the main structure 31, so that the surfaces at the two ends of the sampling structure 32 are almost in the same plane, and stress concentration is not easy to occur at the positions where the two ends of the sampling structure 32 contact the corresponding surfaces, thereby improving the life of the sampling assembly 30.

[0113] According to some embodiments of the present application, the battery module 200 includes a plurality of busbar components 21 , the main structure 31 includes a plurality of extension portions 312 , the extension portions 312 correspond to the busbar components 21 one by one, and the plurality of extension portions 312 are staggered in the first direction X.

[0114] like Figures 3 to 5 As shown, each of the current collecting components 21 corresponds to an extension portion 312 . On one side of the bearing portion 311 , a plurality of extension portions 312 are arranged at intervals along the first direction X. That is, on the same side of the bearing portion 311 , there is a gap between adjacent extension portions 312 .

[0115] When the current collecting components 21 are disposed on both opposite sides of the carrying portion 311 , the extension portions 312 on both sides of the carrying portion 311 are alternately disposed in the first direction X. That is, the extension portions 312 are disposed on one side and the other side of the carrying portion 311 in sequence along the first direction X.

[0116] The extension portions 312 are staggeredly arranged on both sides of the bearing portion 311 in the first direction X, so that the stress distribution on the bearing portion 311 is more uniform, which is beneficial to improving the strength of the sampling assembly 30 and thus improving the service life of the sampling assembly 30 .

[0117] An embodiment of the present application further provides a battery, comprising the battery module 200 described in any of the above embodiments.

[0118] An embodiment of the present application also provides an electrical device, including a battery described in any of the above embodiments, and the battery is used to provide electrical energy to the electrical device.

[0119] The embodiment of the present application provides a sampling assembly 30, which is applied to a battery module 200 including a confluence component 21. The battery module 200 includes a plurality of battery cells 20 arranged along a first direction X, and the confluence component 21 electrically connects two adjacent battery cells 20. The sampling assembly 30 includes a main structure 31 and a sampling structure 32. The main structure 31 includes a bearing portion 311 and an extension portion 312. The bearing portion 311 extends along the first direction X and fits with the end cap of the battery cell 20. The bearing portion 311 has a notch 313, and the extension portion 312 extends from the notch 313 to the confluence component 21. The fitting portion 310 of the extension portion 312 fits with the confluence component 21. In the thickness direction Z of the main structure 31, the surface of the fitting portion 310 facing the battery cell 20 fits with the confluence component 21, and the sampling structure 32 is provided on the surface facing away from the battery cell 20. The sampling structure 32 includes a sampling wire 321 and a bonding plate 322 . One end of the sampling wire 321 is connected to the surface of the bonding portion 310 away from the battery cell 20 through the bonding plate 322 , and the other end of the sampling wire 321 is connected to the confluence component 21 .

[0120] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A sampling assembly, characterized in that: Applied to a battery module (200) including a converging component (21), the sampling assembly (30) comprises: A main structure (31), at least a portion of which is used to fit with the confluence component (21); A sampling structure (32), one end of the sampling structure (32) is connected to the fitting portion (310) of the main structure (31), and the other end is used to connect to the confluence component (21), and the fitting portion (310) is the portion of the main structure (31) that fits the confluence component (21).

2. The sampling assembly according to claim 1, characterized in that: The main structure (31) comprises a bearing portion (311) and an extending portion (312), wherein the extending portion (312) is connected to the bearing portion (311), and the extending portion (312) comprises the fitting portion (310).

3. The sampling assembly according to claim 2, characterized in that: The extension part (312) is a flexible component.

4. The sampling assembly according to claim 2, characterized in that: The extending portion (312) is arranged on at least one edge of the bearing portion (311), and the extending portion (312) extends in a direction away from the edge of the bearing portion (311).

5. The sampling assembly according to claim 2, characterized in that: The bearing portion (311) has a notch (313), the opening of the notch (313) faces the flow collecting component (21), and the extending portion (312) extends from the notch (313) toward the flow collecting component (21).

6. The sampling assembly according to claim 2, characterized in that: The extension portion (312) and the bearing portion (311) are integrally formed.

7. The sampling assembly according to any one of claims 1 to 6, characterized in that: The sampling structure (32) comprises a sampling wire (321) and a bonding disk (322); one end of the sampling wire (321) is connected to the bonding portion (310) via the bonding disk (322), and the other end of the sampling wire (321) is connected to the confluence component (21).

8. The sampling assembly according to claim 7, characterized in that: The bonding pad (322) is disposed on the bonding portion (310).

9. The sampling assembly according to any one of claims 1 to 6, characterized in that: The bonding portion (310) is bonded to the confluence component (21) on a first side of the main structure (31), and is connected to the sampling structure (32) on a second side of the main structure (31), wherein the first side and the second side are different sides of the main structure (31) in a thickness direction (Z).

10. A battery module, characterized in that: include: A plurality of battery cells (20), wherein the plurality of battery cells (20) are arranged along a first direction (X); A busbar component (21), the busbar component (21) being used to electrically connect two adjacent battery cells (20); According to any one of claims 1 to 9, the sampling assembly (30) is used to sample the battery cell (20) through the busbar component (21).

11. The battery module according to claim 10, characterized in that: The battery cell (20) comprises an end cover and a shell, wherein the end cover is used to cover the shell; The main structure (31) comprises a bearing portion (311) and an extension portion (312), the extension portion (312) is connected to the bearing portion (311), the bearing portion (311) is affixed to the end cover, and the extension portion (312) comprises the affixed portion (310).

12. The battery module according to claim 11, characterized in that: The battery module (200) comprises a plurality of the conduit components (21), the main structure (31) comprises a plurality of the extension portions (312), the extension portions (312) correspond one-to-one to the conduit components (21), and the plurality of the extension portions (312) are staggeredly arranged in the first direction (X).

13. A battery, characterized in that: include: The battery module according to any one of claims 10 to 12.

14. An electrical device, characterized in that: include: The battery as claimed in claim 13, wherein the battery is used to provide electrical energy to the electrical device.

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