Battery device and electric device

Abstract

The embodiment of the utility model provides a battery device and a power utilization device. The battery device comprises a plurality of battery monomers, a confluence component, a sampling component, a first insulating component, a sampling circuit and a control assembly, the bus member is electrically connected to the plurality of battery cells. The sampling part is arranged on one side, deviating from the battery monomers, of the confluence part and comprises a first connecting part and a second connecting part, and the first connecting part is electrically connected with the second connecting part; the first insulating part is arranged between the sampling part and the confluence part and is stacked with the sampling part in the second direction, and the orthographic projection of the first insulating part in the second direction covers the second connecting part. And the second connecting part is electrically connected with the control assembly through the sampling circuit to transmit information of the battery monomers. Wherein the first connecting part further comprises a first welding part, the first welding part exceeds the edge of the first insulating part in the first direction, and the first welding part is attached to the confluence part.

Description

Technical Field

[0001] This application relates to the field of batteries, and more specifically, to a battery device and an electrical device. Background Technology

[0002] Current battery devices typically use multiple battery cells connected in series and parallel to achieve a certain target voltage. Managing these battery cells often requires sampling components to collect information from each cell and transmit it to a Battery Management System (BMS) for centralized management. If the electrical connection between the sampling component and the battery cell fails, it will affect the control of the battery device. Therefore, the reliability of the electrical connection between the sampling component and the battery cell can affect the reliability of the entire battery device.

[0003] Therefore, improving the reliability of battery devices has become an urgent problem to be solved. Utility Model Content

[0004] This application provides a battery device and an electrical device that can improve the reliability of the battery device.

[0005] In a first aspect, a battery device is provided, comprising a plurality of battery cells, a busbar, a sampling component, a first insulating component, sampling lines, and a control assembly. The busbar is electrically connected to the plurality of battery cells. The sampling component is disposed on the side of the busbar away from the battery cells, and includes a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion being electrically connected; a first insulating component is disposed between the sampling component and the busbar and is stacked with the sampling component along a second direction, the orthographic projection of the first insulating component along the second direction covering the second connecting portion. The second connecting portion is electrically connected to the control assembly through the sampling lines to transmit information of the battery cells; wherein, the first connecting portion further includes a first welding portion, the first welding portion extending beyond the edge of the first insulating component along a first direction, and the first welding portion being attached to the busbar.

[0006] In the technical solution provided in this application embodiment, a sampling component is disposed on the surface of a busbar component. A first connecting portion acquires information about the battery cell through a first welding portion. A second connecting portion is connected to a control component through a sampling line to transmit information about the battery cell and is insulated from the busbar component by a first insulating component. The first welding portion of the first connecting portion extends beyond the edge of the first insulating component, thereby enabling the first welding portion to attach to the busbar component. This reduces the possibility of the first welding portion being raised by the first insulating component, which could lead to a poor weld, thereby improving the connection strength between the first connecting portion and the busbar component, and thus improving the reliability of the battery device.

[0007] In some embodiments, a first gap exists between the first connecting portion and the second connecting portion, and the sampling component further includes a fuse portion disposed within the first gap, the fuse portion electrically connecting the first connecting portion and the second connecting portion; wherein the minimum width of the fuse portion is less than the minimum width of the first connecting portion.

[0008] In the technical solution provided in this application embodiment, the first connecting part and the second connecting part of the sampling component are supported on the surface of the busbar component. The first connecting part and the second connecting part are respectively connected to the busbar component and the control component. The two are connected by a fuse part, which is disposed on the busbar component. In this way, the first connecting part, the fuse part and the second connecting part are all located above the busbar component, which helps to reduce the space occupied by the sampling component on the top of the battery cell and helps to avoid space for the sampling line, thereby optimizing the spatial layout of the sampling line. Furthermore, the minimum width of the fuse part is less than the minimum width of the second connecting part. The fuse part is connected to the sampling line through the second connecting part. When the sampling line and the sampling component move relative to each other and generate tension, the tension is first applied to the connection between the second connecting part and the sampling line, which helps to reduce the risk of fuse part failure.

[0009] In some embodiments, the line connecting the two ends of the fuse portion forms an angle with the first direction.

[0010] In the technical solution provided in this application embodiment, the line connecting the two ends of the fuse portion forms an angle with the first direction. On the one hand, this is beneficial to increase the length of the fuse portion, so as to improve its sensitivity in response when the battery cell experiences thermal runaway. On the other hand, it can reduce the size of the first interval set to accommodate the fuse portion, thereby reducing the overall size of the sampling component and further reducing the occupancy of the sampling component on the surface of the busbar component, thereby improving the reliability of the battery device.

[0011] In some embodiments, the fusible portion is provided with multiple curved segments.

[0012] In the technical solution provided in this application embodiment, multiple curved segments can increase the effective length of the fused portion within the same distance, thereby further reducing the overall size of the sampling component.

[0013] In some embodiments, the minimum width d1 of the fuse portion satisfies 0 < d1 ≤ 0.15 mm, the thickness d2 of the fuse portion satisfies 0 < d2 ≤ 75 μm, and the effective length L1 of the fuse portion satisfies 6 mm ≤ L1 ≤ 20 mm.

[0014] In the technical solution provided in this application embodiment, the minimum width d1 of the fuse part satisfies 0 < d1 ≤ 0.15 mm, the thickness d2 of the fuse part satisfies 0 < d2 ≤ 75 μm, and the effective length L1 of the fuse part satisfies 6 mm ≤ L1 ≤ 20 mm. The fuse part can meet the requirement of melting under short-circuit conditions and accumulate sufficient melting heat in a short time, thereby improving the reliability of the battery device. On the other hand, the width, thickness and effective length of the fuse part are not too large, thereby reducing the overall size of the sampling component.

[0015] In some embodiments, the arbitrary side length L4 of the portion of the first connection portion facing the battery cell surface not covered by the first insulating member satisfies 4mm≤L4≤20mm.

[0016] In the technical solution provided in this application embodiment, any side length L4 of the portion of the first connecting part facing the battery cell that is not covered by the first insulating component satisfies 4mm≤L4≤20mm, thereby leaving sufficient connection area, which can reduce the possibility of connection failure during the connection of the first connecting part and the bus component, thereby improving the reliability of the battery device.

[0017] In some embodiments, the sampling component further includes a third connection portion electrically connected to the first connection portion; wherein the third connection portion further includes a second welding portion extending beyond the edge of the first insulating component along a first direction, and the second welding portion is attached to the busbar component.

[0018] In the technical solution provided in this application embodiment, the sampling component is connected to the busbar component through the first connecting part and the third connecting part, forming a multi-point fixation with the busbar component. When the sampling component is subjected to mechanical vibration or the sampling component moves relative to the sampling line, the first connecting part and the third connecting part can improve the connection strength between the sampling component and the busbar component, thereby improving the reliability of the battery device.

[0019] In some embodiments, the third connecting portion and the first connecting portion are respectively disposed on both sides of the second connecting portion along the first direction; the sampling component further includes a connecting arm, the third connecting portion and the first connecting portion are connected by the connecting arm, the connecting arm is located on at least one side of the second connecting portion along the third direction and is spaced apart from the second connecting portion, and the first insulating component is disposed between the connecting arm and the busbar component; the third direction is perpendicular to the first direction.

[0020] In the technical solution provided in this application embodiment, by arranging the position of the third connecting part, the sampling component extends approximately along the first direction, which is beneficial to improving the regularity of the external contour of the sampling component and reducing the material loss of the sampling component during the manufacturing process; in addition, the first connecting part and the third connecting part are respectively located on both sides of the second connecting part along the first direction, which is beneficial to improving the uniformity of the force on the sampling component when it is under tension, thereby reducing the risk of the sampling component and the confluence component becoming disconnected.

[0021] In some embodiments, a first gap exists between the first connecting portion and the second connecting portion, and the sampling component further includes a fuse portion disposed within the first gap, the fuse portion electrically connecting the first connecting portion and the second connecting portion; wherein, the minimum width of the fuse portion is less than the minimum width of the first connecting portion, and the width of the connecting arm is greater than the minimum width of the fuse portion.

[0022] In the technical solution provided in this application embodiment, when the width of the connecting arm is greater than the minimum width of the fuse part, the fuse part mainly undertakes the circuit breaking function in the case of a short circuit in a battery cell, while the width of the connecting arm is not too small, which is beneficial to improving the overall structural strength of the sampling component.

[0023] In some embodiments, the battery device further includes: a second insulating member disposed on the side of the sampling member away from the battery cell and stacked with the sampling member along a second direction; wherein, along the second direction, the orthographic projection of the second insulating member covers the first interval but does not cover at least a portion of the second connection portion, and the control component is electrically connected to the portion of the second connection portion on the surface away from the battery cell that is not covered by the second insulating member.

[0024] In the technical solution provided in this application embodiment, the orthogonal projection of the second insulating component along the second direction covers the first interval. On the one hand, this can enhance the structural strength of the sampling component and maintain the shape of the fused part. On the other hand, it can reduce the possibility of corrosion of the fused part, thereby increasing the life of the sampling component and thus improving the reliability of the battery device.

[0025] In some embodiments, the second weld extends beyond the edge of the first insulating member along a first direction.

[0026] The second weld portion of the third connection extends beyond the edge of the first insulating member, thereby enabling the second weld portion to attach to the busbar component. This reduces the possibility of the second weld portion being raised by the first insulating member, which could lead to a poor weld. As a result, the connection strength between the third connection portion and the busbar component can be improved, thereby enhancing the reliability of the battery device.

[0027] In some embodiments, the long side dimension L2 and short side dimension L3 of the portion of the second connection portion that is not covered by the second insulating component on the surface of the battery cell satisfy 4mm≤L2≤20mm and 2mm≤L3≤10mm, respectively.

[0028] In the technical solution provided in this application embodiment, the long side dimension L2 and short side dimension L3 of the part of the second connection portion that is not covered by the second insulating component away from the surface of the battery cell satisfy 4mm≤L2≤20mm and 2mm≤L3≤10mm, respectively, thereby providing sufficient connection space, improving connection quality, and thus improving the reliability of the battery device.

[0029] In some embodiments, both ends of the first insulating component and the second insulating component extend beyond the sampling component along a third direction, which is perpendicular to the first direction.

[0030] In the technical solution provided in this application embodiment, both ends of the first insulating component and the second insulating component extend beyond the sampling component in a third direction, thereby reducing the possibility of short circuits between the edge of the sampling component and other components in the battery device, and thus improving the reliability of the battery device.

[0031] In some embodiments, the first insulating component and the second insulating component are bonded together at the portion extending beyond the sampling component in a third direction.

[0032] In the technical solution provided in this application embodiment, the first insulating component and the second insulating component are bonded together in a third direction beyond the sampling component, which can improve the overall structural strength of the sampling component and improve the efficiency of assembling the sampling component into the battery device, thereby improving the reliability of the battery device.

[0033] In some embodiments, the two ends of the first insulating component and the second insulating component extend beyond the size d3 of the sampling component along a third direction, satisfying 0.5mm≤d3≤2mm.

[0034] In the technical solution provided in this application embodiment, the two ends of the first insulating component and the second insulating component extend beyond the size d3 of the sampling component along a third direction, satisfying 0.5mm≤d3≤2mm. On the one hand, the bonding area of ​​the first insulating component and the second insulating component is large enough to provide sufficient structural strength for the sampling component. On the other hand, the size of the first insulating component and the second insulating component is not too large, thereby reducing the overall size of the sampling component.

[0035] In some embodiments, the arbitrary side length L5 of the portion of the first connection portion that is not covered by the second insulating component on the surface of the battery cell satisfies 4mm≤L5≤20mm.

[0036] In the technical solution provided in this application embodiment, the arbitrary side length L5 of the part of the first connecting portion that is not covered by the second insulating component away from the surface of the battery cell satisfies 4mm≤L5≤20mm, thereby leaving sufficient connection area, which can reduce the possibility of connection failure during the connection of the first connecting portion and the bus component, thereby improving the reliability of the battery device.

[0037] In some embodiments, an insulating medium is filled between the first connecting portion and the second connecting portion.

[0038] In the technical solution provided in this application embodiment, an insulating medium is filled between the first connecting part and the second connecting part. On the one hand, this can further improve the creepage distance between the first connecting part and the second connecting part and reduce the possibility of internal short circuit in the sampling component. On the other hand, the insulating medium can support the various structures inside the sampling component. During use, even if the sampling component is affected by impact vibration, the components inside the sampling component are not easy to be displaced or deformed, thereby improving the reliability of the battery device.

[0039] In a second aspect, an electrical device is provided, comprising: a battery device as described in any of the first aspects, wherein the battery device is used to provide electrical energy.

[0040] In some embodiments, the electrical device is a vehicle, a ship, or a spacecraft. Attached Figure Description

[0041] Figure 1 A schematic diagram of the structure of a vehicle according to one embodiment of this application is shown;

[0042] Figure 2 A partial structural schematic diagram of the battery device according to an embodiment of this application is shown;

[0043] Figure 3 A partial schematic diagram of a battery device provided in one embodiment of this application is shown;

[0044] Figure 4 This application shows Figure 3 An enlarged schematic diagram of part A in the diagram;

[0045] Figure 5 An exploded view of a sampling component provided in one embodiment of this application is shown;

[0046] Figure 6 A top view schematic diagram of a sampling component in a battery device provided in a certain embodiment of this application is shown;

[0047] Figure 7 This application shows Figure 6 Schematic diagram of the BB section;

[0048] Figure 8 This application shows Figure 7 An enlarged schematic diagram of part C in the diagram;

[0049] Figure 9 This application shows Figure 3 Another possible enlarged schematic diagram of part A in the diagram;

[0050] Figure 10 An exploded view of a sampling component in a battery device according to another embodiment of this application is shown;

[0051] Figure 11 A top view schematic diagram of a sampling component in a battery device provided in another embodiment of this application is shown;

[0052] Figure 12 This application shows Figure 3 Another possible enlarged schematic diagram of part A in the diagram;

[0053] Figure 13 An exploded view of the sampling component in a battery device provided in another embodiment of this application is shown;

[0054] Figure 14 A top view schematic diagram of a sampling component provided in another embodiment of this application is shown;

[0055] Figure 15 This application shows Figure 14 A schematic diagram of the DD section.

[0056] The accompanying drawings are not drawn to scale.

[0057] Figure label:

[0058] 1-Vehicle; 10-Battery unit; 20-Battery cell; 30-Controller; 40-Motor; 11-Box; 111-First box section; 112-Second box section; 12-Busher component; 13-Sampling line; 14-Control component; 200-Sampling component; 210-Sampling part; 211-First connection part; 2111-First welded part; 212-Second connection part; 213-Third connection part; 2131-Second welded part; 214-Connecting arm; 215-Fuse part; 216-First gap; 220-First insulating component; 230-Second insulating component. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0060] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0061] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0062] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0063] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0064] In the embodiments of this application, the same reference numerals denote 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 this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0065] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0066] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0067] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0068] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0069] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0070] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab or indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0071] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0072] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0073] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0074] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0075] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0076] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0077] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0078] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0079] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0080] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0081] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0082] Current battery devices typically use multiple battery cells connected in series and parallel to achieve a certain target voltage. Managing these battery cells often requires sampling components to collect information from each cell and transmit it to a Battery Management System (BMS) for centralized management. If the electrical connection between the sampling component and the battery cell fails, it will affect the control of the battery device. Therefore, the reliability of the electrical connection between the sampling component and the battery cell can affect the reliability of the entire battery device.

[0083] Therefore, improving the reliability of battery devices has become an urgent problem to be solved.

[0084] This application provides a battery device including multiple battery cells, a busbar, a sampling component, a first insulating component, sampling lines, and a control component. The busbar is electrically connected to the multiple battery cells. The sampling component is disposed on the side of the busbar away from the battery cells, and includes a first connecting portion and a second connecting portion, which are electrically connected. A first insulating component is disposed between the sampling component and the busbar and is stacked with the sampling component along a second direction, with its orthographic projection along the second direction covering the second connecting portion. The second connecting portion is electrically connected to the control component through the sampling lines to transmit information about the battery cells. The first connecting portion further includes a first welding portion that extends beyond the edge of the first insulating component along a first direction and is attached to the busbar.

[0085] In the technical solution provided in this application embodiment, a sampling component is disposed on the surface of a busbar component. A first connecting portion acquires information about the battery cell through a first welding portion. A second connecting portion is connected to a control component through a sampling line to transmit information about the battery cell and is insulated from the busbar component by a first insulating component. The first welding portion of the first connecting portion extends beyond the edge of the first insulating component, thereby enabling the first welding portion to attach to the busbar component. This reduces the possibility of the first welding portion being raised by the first insulating component, which could lead to a poor weld, thereby improving the connection strength between the first connecting portion and the busbar component, and thus improving the reliability of the battery device.

[0086] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices.

[0087] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical equipment.

[0088] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0089] For example, such as Figure 1The diagram shown is a structural schematic of a vehicle 1 according to one embodiment of this application. Vehicle 1 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A motor 40, a controller 30, and a battery device 10 can be installed inside vehicle 1. The controller 30 controls the battery device 10 to supply power to the motor 40. For example, the battery device 10 can be installed at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1. For example, the battery device 10 can serve as the operating power source for vehicle 1, for example, to meet the electrical system requirements of vehicle 1, such as for starting, navigation, and operation. In another embodiment of this application, the battery device 10 can not only serve as the operating power source for vehicle 1, but also as the driving power source for vehicle 1, replacing or partially replacing gasoline or natural gas to provide driving power for vehicle 1.

[0090] For example, Figure 2 A partial structural schematic diagram of the battery device 10 according to an embodiment of this application is shown. Figure 2 As shown, the battery device 10 of this application embodiment may include a plurality of battery cells 20 to meet different power usage requirements. The shape of the battery cell 20 in this application embodiment can be set according to actual application. For example, the battery cell 20 can be as follows: Figure 2 The cylindrical shape shown, or it could be different. Figure 2 The embodiments shown may be cuboids or other shapes, but are not limited to these.

[0091] It should be understood that, such as Figure 2 As shown, the battery device 10 of this embodiment may further include a housing 11, which can be used to accommodate multiple battery cells 20. The housing 11 of this embodiment has a hollow interior, and the multiple battery cells 20 are accommodated within the housing 11. The housing 11 may include two parts, referred to herein as a first housing portion 111 and a second housing portion 112, which are fastened together. The shapes of the first housing portion 111 and the second housing portion 112 can be determined according to the shape of the components housed inside, for example, according to the shape of the combination of the multiple battery cells 20 housed inside. At least one of the first housing portion 111 and the second housing portion 112 has an opening. For example, as... Figure 2As shown, the first housing portion 111 and the second housing portion 112 can both be hollow cuboids with one open side each. The openings of the first housing portion 111 and the second housing portion 112 are opposite to each other, and the first housing portion 111 and the second housing portion 112 are interlocked to form a housing 11 with a closed chamber, which can be used to accommodate multiple battery cells 20. The multiple battery cells 20 are connected in parallel, series, or mixed and placed inside the housing 11 formed by the interlocking of the first housing portion 111 and the second housing portion 112.

[0092] For example, unlike Figure 2 As shown, either the first housing portion 111 or the second housing portion 112 may have only one hollow cuboid with an opening, while the other is plate-shaped to cover the opening. Taking the second housing portion 112 as a hollow cuboid with one opening and the first housing portion 111 as a plate-shaped example, then the first housing portion 111 covers the opening of the second housing portion 112 to form a housing 11 with a closed chamber, which can be used to accommodate multiple battery cells 20.

[0093] The following is combined Figures 3 to 5 This application describes a battery device 10 and a sampling component 200 provided in a certain embodiment.

[0094] The sampling component 200 may consist of multiple parts, such as sampling component 210 and insulating component, but the embodiments of this application are not limited thereto.

[0095] Figure 3 This paper shows a partial schematic diagram of a battery device 10 provided in one embodiment of the present application; Figure 4 This application shows Figure 3 An enlarged schematic diagram of part A in the diagram; Figure 5 An exploded view of a sampling component 200 provided in one embodiment of this application is shown.

[0096] This application provides a battery device 10, including a plurality of battery cells 20, a busbar 12, a sampling component 210, a first insulating component 220, a sampling line 13, and a control component 14. The busbar 12 is electrically connected to the plurality of battery cells 20. The sampling component 210 is disposed on the side of the busbar 12 opposite to the battery cells 20, and the sampling component 210 includes a first connecting portion 211 and a second connecting portion 212 disposed along a first direction, the first connecting portion 211 and the second connecting portion 212 being electrically connected; the first insulating component 220 is disposed between the sampling component 210 and the busbar 12 and is stacked with the sampling component 210 along a second direction, the orthographic projection of the first insulating component 220 along the second direction covering the second connecting portion 212. The second connection part 212 is electrically connected to the control component 14 via the sampling line 13 to transmit information of the battery cell 20; wherein, the first connection part 211 further includes a first welding part 2111, the first welding part 2111 extends beyond the edge of the first insulating component 220 along a first direction, and the first welding part 2111 is attached to the busbar component 12.

[0097] The figure is illustrated with the first direction as the X direction, the second direction as the Z direction, and the third direction as the Y direction, but the embodiments of this application are not limited thereto.

[0098] The sampling component 210 can collect information about the battery cell 20, such as the voltage, current, and temperature of the battery cell 20.

[0099] The sampling component 210 can be a sheet-like structure with sampling function. Through the sampling component 210, information from the battery cell 20 can be collected and transmitted to the control component 14 connected to it. The sampling component 210 can also be a single structure, with a hollowed-out area etched into it using an etching process to achieve the function of this embodiment. The sampling component 210 can also consist of multiple structures connected together. This embodiment illustrates the sampling component 210 as a single structure, but it is not limited to this.

[0100] The busbar component 12 can be a busbar, busbar, etc. The name of the busbar component 12 is not limited in this application embodiment.

[0101] The first connecting part 211 and the second connecting part 212 can be electrically connected by a metal wire, but this application embodiment is not limited to this.

[0102] The first insulating component 220 can be an insulating sheet, an insulating film, etc. The first insulating component 220 can be made of a material with anti-static function, such as polyimide, polyethylene terephthalate, epoxy board, etc. The embodiments of this application are not limited thereto.

[0103] The figure shows that the sampling component 210 is electrically connected to the sampling line 13. Furthermore, the sampling line 13 can be electrically connected to the control component 14 to transmit information of the battery cell 20.

[0104] The control component 14 may be a battery management system, but this application embodiment does not limit it.

[0105] Information from the battery cell 20 is collected through the first connection part 211 and transmitted to the control component 14 through the second connection part 212.

[0106] The first welding portion 2111 may be a reserved area of ​​the first connecting portion 211 for welding with the busbar component 12. The first welding portion 2111 is exposed to the surface of the busbar component 12, thereby attaching to the busbar component 12.

[0107] Since the first insulating component 220 has a certain thickness, the first connecting part 211 may be raised by the first insulating component 220. When the sampling component 210 is welded to the surface of the busbar component 12, a poor solder joint may occur, which may lead to a decrease in the reliability of the battery device 10.

[0108] In this embodiment, the sampling component 210 is welded to the busbar component 12 by the first welding part 2111. Since the first welding part 2111 extends beyond the edge of the first insulating component 220, the first welding part 2111 can fit with the busbar component 12, thereby reducing the possibility of incomplete welding during the welding process.

[0109] In the technical solution provided in this application embodiment, the sampling component 210 is disposed on the surface of the busbar component 12. The first connecting portion 211 acquires information of the battery cell 20 through the first welding portion 2111. The second connecting portion 212 is connected to the control component 14 through the sampling line 13 to transmit information of the battery cell 20 and is insulated from the busbar component 12 through the first insulating component 220. The first welding portion 2111 of the first connecting portion 211 extends beyond the edge of the first insulating component 220, thereby enabling the first welding portion 2111 to be attached to the busbar component 12. This reduces the possibility of the first welding portion 2111 being raised by the first insulating component 220, which could lead to a poor solder joint. This improves the connection strength between the first connecting portion 2111 and the busbar component 12, thereby improving the reliability of the battery device 10.

[0110] In some embodiments, a first gap 216 is provided between the first connecting portion 211 and the second connecting portion 212, and the sampling component 210 further includes a fuse portion 215 disposed within the first gap 216, wherein the fuse portion 215 electrically connects the first connecting portion 211 and the second connecting portion 212; wherein the minimum width of the fuse portion 215 is less than the minimum width of the first connecting portion 211.

[0111] The fuse part 215 can be a metal wire with a fusing function. When the fuse part 215 is connected to the circuit, it can quickly accumulate enough heat to melt when the circuit is short-circuited.

[0112] In the event of a short circuit in the sampling line 13, the fuse 215 can melt, thereby reducing the possibility of short circuits between battery cells 20.

[0113] Since the fuse portion 215 needs to accumulate a certain amount of heat to melt, it typically has a certain length. In this embodiment, the fuse portion 215 is disposed within the gap between the first connecting portion 211 and the second connecting portion 212, thereby utilizing the space on the surface of the busbar 12 and inside the sampling component 210 to accommodate the fuse portion 215, and utilizing the space inside the sampling component 210 to arrange the fuse portion 215 to connect the first connecting portion 211 and the second connecting portion 212, thereby reducing the space occupied inside the battery device 10 and on the surface of the busbar 12.

[0114] In the technical solution provided in this application embodiment, the first connecting part 211 and the second connecting part 212 of the sampling component 210 are supported on the surface of the busbar component 12. The first connecting part 211 and the second connecting part 212 are respectively connected to the busbar component 12 and the control component 14. The two are connected by a fuse part 215, which is disposed on the busbar component 12. Thus, the first connecting part 211, the fuse part 215 and the second connecting part 212 are all located above the busbar component 12, which helps to reduce the space occupied by the sampling component 210 on the top of the battery cell 20 and helps to avoid space for the sampling line 13, thereby optimizing the spatial layout of the sampling line. Furthermore, the minimum width of the fuse part 215 is smaller than the minimum width of the second connecting part 212. The fuse part 215 is connected to the sampling line 13 through the second connecting part 212. When the sampling line 13 and the sampling component 210 move relative to each other and generate tension, the tension is first applied to the connection between the second connecting part 212 and the sampling line 13, which helps to reduce the risk of the fuse part 215 breaking and failing.

[0115] The following is combined Figures 6 to 8 This application describes a battery device 10 and a sampling component 200 provided in a certain embodiment.

[0116] Figure 6 A top view schematic diagram of the sampling component 210 in a battery device 10 provided in a certain embodiment of this application is shown; Figure 7 This application shows Figure 6 Schematic diagram of the BB section; Figure 8 This application shows Figure 7 An enlarged schematic diagram of part C in the diagram.

[0117] In some embodiments, the first connecting portion 211 and the second connecting portion 212 are arranged along a first direction, and the line connecting the two ends of the fused portion 215 forms an angle with the first direction.

[0118] The fuse portion 215 is electrically connected to the second connecting portion 212 and the first connecting portion 211, and the line connecting the two ends of the fuse portion 215 has a certain angle with the first direction, which can increase the length of the fuse portion 215 per unit area, thereby making it easier to meet the size of the fuse portion 215 that can accumulate sufficient heat.

[0119] In the technical solution provided in this application embodiment, the line connecting the two ends of the fuse portion 215 forms an angle with the first direction. On the one hand, this is beneficial to increase the length of the fuse portion 215, so as to improve its sensitivity in response when the battery cell 20 experiences thermal runaway. On the other hand, it can reduce the size of the first interval 216 provided to accommodate the fuse portion 215, thereby reducing the overall size of the sampling component 210 and further reducing the occupancy of the sampling component 210 on the surface of the busbar component 12, thereby improving the reliability of the battery device 10.

[0120] In some embodiments, the fuse portion 215 is provided with a plurality of curved segments.

[0121] In the technical solution provided in this application embodiment, multiple curved segments can increase the effective length of the fused portion 215 within the same distance, thereby further reducing the overall size of the sampling component 210.

[0122] In some embodiments, the minimum width d1 of the fuse portion 215 satisfies 0 < d1 ≤ 0.15 mm, the thickness d2 of the fuse portion 215 satisfies 0 < d2 ≤ 75 μm, and the effective length L1 of the fuse portion 215 satisfies 6 mm ≤ L1 ≤ 20 mm.

[0123] The effective length of the fuse section 215 can be understood as the actual current-passing length of the fuse section 215, for example... Figure 9 In this context, the effective length of the fuse portion 215 is the length along the extension direction of the fuse portion 215.

[0124] In the technical solution provided in this application embodiment, the minimum width d1 of the fuse portion 215 satisfies 0 < d1 ≤ 0.15 mm, the thickness d2 of the fuse portion 215 satisfies 0 < d2 ≤ 75 μm, and the effective length L1 of the fuse portion 215 satisfies 6 mm ≤ L1 ≤ 20 mm. The fuse portion 215 can meet the requirement of melting under short-circuit conditions and accumulate sufficient melting heat in a short time, thereby improving the reliability of the battery device 10. On the other hand, the width, thickness, and effective length of the fuse portion 215 are not too large, thereby reducing the overall size of the sampling component 210.

[0125] Furthermore, the minimum width d1 of the fuse portion 215 can satisfy 0.05mm≤d1≤0.10mm, the thickness d2 of the fuse portion 215 can satisfy 10μm≤d2≤50μm, and the effective length L1 of the fuse portion 215 can satisfy 8mm≤L1≤15mm. The width, thickness, and length of the fuse portion 215 are within this range, which can further improve the sensitivity of the fuse portion 215 to short circuits in the sampling circuit, and further reduce the space occupied by the sampling component 210, thereby reducing the overall size of the sampling component 210.

[0126] The minimum width d1 of the fuse portion 215 can also take other values. For example, the minimum width d1 of the fuse portion 215 can take any of the following values ​​or any two of the following values: 0.01mm, 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.10mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm.

[0127] The thickness d2 of the fusible portion 215 can also take other values. For example, the thickness d2 of the fusible portion 215 can take any of the following values ​​or any value between any two of them: 5.0μm, 10.0μm, 15.0μm, 20.0μm, 25.0μm, 30.0μm, 35.0μm, 40.0μm, 45.0μm, 50.0μm, 55.0μm, 60.0μm, 65.0μm, 70.0μm, 75.0μm.

[0128] The effective length L1 of the fuse portion 215 can also take other values. For example, the effective length L1 of the fuse portion 215 can take any of the following values ​​or any two of the following values: 6.0mm, 7.0mm, 8.0mm, 9.0mm, 10.0mm, 11.0mm, 12.0mm, 13.0mm, 14.0mm, 15.0mm, 16.0mm, 17.0mm, 18.0mm, 19.0mm, 20.0mm.

[0129] In some embodiments, the arbitrary side length L4 of the portion of the first connecting portion 211 facing the surface of the battery cell 20 that is not covered by the first insulating member 220 satisfies 4mm≤L4≤20mm.

[0130] In the technical solution provided in this application embodiment, the arbitrary side length L4 of the portion of the first connecting part 211 facing the battery cell 20 that is not covered by the first insulating component 220 satisfies 4mm≤L4≤20mm, thereby leaving sufficient connection area, which can reduce the possibility of connection failure during the connection of the first connecting part 211 and the busbar component 12, thereby improving the reliability of the battery device 10.

[0131] Furthermore, any side length L4 of the portion of the first connecting part 211 facing the battery cell 20 that is not covered by the first insulating member 220 can satisfy 6mm≤L4≤10mm. With L4 within this range, on the one hand, the reliability of the connection during the connection of the first connecting part 211 and the busbar member 12 can be further improved, and on the other hand, the first connecting part 211 will not be too large, thus not occupying too much space.

[0132] Furthermore, the side length L4 of the portion of the first connecting portion 211 facing the surface of the battery cell 20 that is not covered by the first insulating member 220 can also take other values. For example, L4 can take any of the following values ​​or any value between two of them: 4.0mm, 5.0mm, 6.0mm, 7.0mm, 8.0mm, 9.0mm, 10.0mm, 11.0mm, 12.0mm, 13.0mm, 14.0mm, 15.0mm, 16.0mm, 17.0mm, 18.0mm, 19.0mm, and 20.0mm.

[0133] The following is combined Figures 9 to 11 This application describes a sampling component 210 provided in one embodiment.

[0134] Figure 9 This application shows Figure 3 Another possible enlarged schematic diagram of part A in the diagram; Figure 10 An exploded view of the sampling component 200 in a battery device 10 provided in another embodiment of this application is shown; Figure 11 A top view schematic diagram of the sampling component 200 in a battery device 10 provided in another embodiment of this application is shown.

[0135] In some embodiments, the sampling component 210 further includes a third connection portion 213, which is electrically connected to the first connection portion 211; wherein the third connection portion 213 further includes a second welding portion 2131, which extends beyond the edge of the first insulating component 220 along a first direction and is attached to the busbar component 12.

[0136] During the use of the battery device 10, mechanical vibration may occur, which may cause fatigue in the connection between the sampling component 210 and the busbar component 12, resulting in loosening and affecting the reliability of the battery device 10.

[0137] In this embodiment of the application, the sampling component 210 is further provided with a third connecting part 213, and the third connecting part 213 is electrically connected to the busbar component 12, so that the third connecting part 213 and the first connecting part 211 can form a multi-point fixation with the busbar component 12.

[0138] In the technical solution provided in this application embodiment, the sampling component 210 is connected to the busbar component 12 through the first connecting part 211 and the third connecting part 213, forming a multi-point fixation with the busbar component 12. When the sampling component 210 is subjected to mechanical vibration or when the sampling component 210 moves relative to the sampling line 13, the first connecting part 211 and the third connecting part 213 can improve the connection strength between the sampling component 210 and the busbar component 12, thereby improving the reliability of the battery device 10.

[0139] In some embodiments, the third connecting portion 213 and the first connecting portion 211 are respectively disposed on both sides of the second connecting portion 212 along the first direction; the sampling component 210 further includes a connecting arm 214, the third connecting portion 213 and the first connecting portion 211 are connected by the connecting arm 214, the connecting arm 214 is located on at least one side of the second connecting portion 212 along the third direction and is spaced apart from the second connecting portion 212, and the first insulating component 220 is disposed between the connecting arm 214 and the busbar component 12; the third direction is perpendicular to the first direction.

[0140] The third connecting part 213 and the first connecting part 211 are respectively disposed on both sides of the second connecting part 212 along the first direction. The third connecting part 213 and the first connecting part 211 form a chelate with the confluence component 12, thereby further improving the connection strength between the sampling component 210 and the confluence component 12.

[0141] On the other hand, the first connecting part 211 and the third connecting part 213 surround the second connecting part 212, and the overall structure of the sampling component 210 is compact, which can reduce the occupancy of the sampling component 210 on the surface of the busbar component 12.

[0142] The first insulating component 220 has a certain thickness. Therefore, the first connecting part 211 and the third connecting part 213 may be partially raised. When the connecting arm 214 is narrow, the connecting arm 214 is more easily deformed than the first connecting part 211, thereby reducing the gap size caused by being raised, so that the first connecting part 211 and the third connecting part 213 can better fit the surface of the sampled area.

[0143] In the technical solution provided in this application embodiment, by arranging the position of the third connecting part 213, the sampling component 210 extends approximately along the first direction, which helps to improve the regularity of the external contour of the sampling component 210 and reduce the material loss of the sampling component 210 during the manufacturing process; and the first connecting part 211 and the third connecting part 213 are respectively located on both sides of the second connecting part 212 along the first direction, which helps to improve the uniformity of the force on the sampling component 210 when under tension, thereby reducing the risk of the sampling component 210 becoming disconnected from the confluence component 12.

[0144] In some embodiments, the width of the connecting arm 214 is greater than the minimum width of the fuse portion 215.

[0145] In the technical solution provided in this application embodiment, when the width of the connecting arm 214 is greater than the minimum width of the fuse part 215, the fuse part 215 mainly undertakes the circuit breaking function in the case of short circuit of the battery cell 20, while the width of the connecting arm 214 is not too small, which is beneficial to improving the overall structural strength of the sampling component 210.

[0146] The following is combined Figures 12 to 15 This application describes a battery device 10 and a sampling component 200 provided in another embodiment.

[0147] Figure 12 This application shows Figure 3 Another possible enlarged schematic diagram of part A in the diagram; Figure 13 An exploded view of the sampling component 200 in a battery device 10 provided in another embodiment of this application is shown; Figure 14 A top view schematic diagram of a sampling component 210 provided in another embodiment of this application is shown; Figure 15 This application shows Figure 14 A schematic diagram of the DD section.

[0148] In some embodiments, the battery device 10 further includes a second insulating member 230, which is disposed on the side of the sampling member 210 away from the battery cell 20 and is stacked with the sampling member 210 along a second direction; wherein, along the second direction, the orthographic projection of the second insulating member 230 covers the first interval 216 but does not cover at least a portion of the second connection portion 212, and the control component 14 is electrically connected to the portion of the second connection portion 212 on the surface away from the battery cell 20 that is not covered by the second insulating member 230.

[0149] The second insulating component 230 covers the side of the sampling component 210 facing away from the battery cell 20. On one hand, the first insulating component 220 and the second insulating component 230 work together to clamp the fuse portion 215, reducing the possibility of deformation of the fuse portion 215. On the other hand, since the surface of the fuse portion 215 is easily exposed to air, it is susceptible to corrosion. The second insulating component 230 can reduce the possibility of corrosion of the fuse portion 215, thereby increasing the lifespan of the sampling component 210.

[0150] In the technical solution provided in this application embodiment, the second insulating component 230 covers the first interval 216 by its orthogonal projection along the second direction. On the one hand, this can enhance the structural strength of the sampling component 210 and maintain the shape of the fused portion 215. On the other hand, it can reduce the possibility of corrosion of the fused portion 215, thereby increasing the lifespan of the sampling component 210 and thus improving the reliability of the battery device 10.

[0151] The first insulating component 220 may cover the portion of the first connecting portion 211 facing the surface of the battery cell 20 and the portion of the second connecting portion 212 facing the surface of the battery cell 20.

[0152] The first insulating component 220 covers the portion of the first connecting portion 211 and the second connecting portion 212 facing the surface of the battery cell 20, thereby providing better support for the first connecting portion 211 and the second connecting portion 212, thus better maintaining the shape of the sampling component 210 and reducing the degree of deformation of the sampling component 210 under long-term use.

[0153] In the technical solution provided in this application embodiment, the first insulating component 220 covers the portion of the first connecting portion 211 facing the surface of the battery cell 20 and the portion of the second connecting portion 212 facing the surface of the battery cell 20. The first insulating component 220 can provide a certain support for the first connecting portion 211 and the second connecting portion 212. On the one hand, it can make the portion where the first connecting portion 211 and the second connecting portion 212 are connected on the same plane, thereby reducing the possibility of deformation of the fuse portion 215 due to the height difference between the two ends of the connection. On the other hand, it can balance the stress on the first connecting portion 211 and the third connecting portion 213, reducing the possibility of the second connecting portion 212 tilting due to long-term use.

[0154] Furthermore, the second insulating component 230 can cover the portion of the first connecting portion 211 facing away from the battery cell 20, the portion of the second connecting portion 212 facing away from the battery cell 20, and the portion of the third connecting portion 213 facing away from the battery cell 20, thereby clamping the entire sampling component 210.

[0155] The second insulating component 230 covers the portion of the first connecting portion 211 that faces away from the surface of the battery cell 20 and the portion of the second connecting portion 212 that faces away from the surface of the battery cell 20, thereby forming a clamping effect between the second insulating component 230 and the first insulating component 220 on the first connecting portion 211 and the second connecting portion 212, which can better fix the sampling component 210 into a whole and improve the structural strength of the sampling component 210.

[0156] The portion of the second connection part 212 that is away from the surface of the battery cell 20 and not covered by the second insulating component 230 is used to connect the control assembly 14. For example, this portion is soldered to the sampling line 13.

[0157] The second connecting part 212 has a larger exposed size, which can leave enough space for connection. The connection process is not easy to overlap with other parts, which can improve the reliability of the connection.

[0158] The second insulating component 230 may have a through hole in the area opposite to the first welding part 2111. When the sampling component 210 is welded to the busbar component 12, the first welding part 2111 can be welded through the through hole. This application embodiment is not limited thereto.

[0159] In some embodiments, the first weld portion 2111 extends beyond the edge of the second insulating member 230 along a first direction.

[0160] The second weld portion 2131 of the third connection portion 213 extends beyond the edge of the first insulating member 220, thereby enabling the second weld portion 2131 to be attached to the busbar member 12. This reduces the possibility of the second weld portion 2131 being raised by the first insulating member 220, which could lead to a poor weld on the second weld portion 2131. This improves the connection strength between the third connection portion 213 and the busbar member 12, thereby enhancing the reliability of the battery device 10.

[0161] In some possible embodiments, the long side dimension L2 and short side dimension L3 of the portion of the second connection portion 212 that is away from the surface of the battery cell 20 and is not covered by the second insulating member 230 satisfy 4mm≤L2≤20mm and 2mm≤L3≤10mm, respectively.

[0162] In the technical solution provided in this application embodiment, the long side dimension L2 and short side dimension L3 of the portion of the second connecting part 212 that is away from the surface of the battery cell 20 and is not covered by the second insulating component 230 satisfy 4mm≤L2≤20mm and 2mm≤L3≤10mm, respectively, thereby providing sufficient connection space, improving connection quality, and thus improving the reliability of the battery device 10.

[0163] Furthermore, the long side dimension L2 and short side dimension L3 of the portion of the second connection portion 212 that is not covered by the second insulating member 230 away from the surface of the battery cell 20 can respectively satisfy 6mm≤L2≤10mm and 3mm≤L3≤6mm. Within this range, on the one hand, the connection quality can be further improved, and on the other hand, the size of the connection area can be reduced, thereby reducing the overall size of the sampling member 210.

[0164] The length L2 of the portion of the second connecting part 212 that is not covered by the second insulating member 230 away from the surface of the battery cell 20 can also take other values. For example, L2 can take any of the following values ​​or any two of the following values: 4.0mm, 5.0mm, 6.0mm, 7.0mm, 8.0mm, 9.0mm, 10.0mm, 11.0mm, 12.0mm, 13.0mm, 14.0mm, 15.0mm, 16.0mm, 17.0mm, 18.0mm, 19.0mm, 20.0mm.

[0165] The dimension L3 of the short side of the portion of the second connecting part 212 that is away from the surface of the battery cell 20 and is not covered by the second insulating member 230 can also take other values. For example, L3 can take any of the following values ​​or any two of the following values: 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm, 5.5mm, 6.0mm, 6.5mm, 7.0mm, 7.5mm, 8.0mm, 8.5mm, 9.0mm, 9.5mm, 10.0mm.

[0166] In some embodiments, both ends of the first insulating member 220 and the second insulating member 230 extend beyond the sampling member 210 along a third direction, and the third direction is perpendicular to the first direction and parallel to the sampling member 210 away from the surface of the battery cell 20.

[0167] During the use of sampling component 210, sampling component 210 may wear or deform due to long-term stress, which may cause a short circuit between it and other components in battery device 10.

[0168] Both ends of the first insulating component 220 and the second insulating component 230 extend beyond the sampling component 210 in the third direction. The first insulating component 220 and the second insulating component 230 can effectively protect the edge of the sampling component 210 and reduce the possibility of short circuit between the edge of the sampling component 210 and the battery cell 20 due to deformation or burrs.

[0169] In the technical solution provided in this application embodiment, both ends of the first insulating component 220 and the second insulating component 230 extend beyond the sampling component 210 in a third direction, thereby reducing the possibility of short circuits between the edge of the sampling component 210 and other components in the battery device 10, thereby improving the reliability of the battery device 10.

[0170] In some possible embodiments, the first insulating member 220 and the second insulating member 230 are bonded together in a third direction to the portion extending beyond the sampling member 210.

[0171] The first insulating component 220 and the second insulating component 230 are bonded together along the third direction beyond the sampling component 210, which can fix the sampling component 210 as a whole. On the one hand, it can strengthen the structural strength of each component in the sampling component 210, making it less likely for each component to shift or deform, thereby improving the reliability of the connection between the sampling component 210 and the battery cell 20 and the sampling line 13. On the other hand, it can enable the sampling component 210 to be installed as a whole, thereby improving the assembly efficiency of the battery device 10.

[0172] In the technical solution provided in this application embodiment, the first insulating component 220 and the second insulating component 230 are bonded together along a third direction beyond the sampling component 210, which can improve the overall structural strength of the sampling component 210 and improve the efficiency of assembling the sampling component 210 into the battery device 10, thereby improving the reliability of the battery device 10.

[0173] In some embodiments, the two ends of the first insulating member 220 and the second insulating member 230 extend beyond the dimension d3 of the sampling member 210 along a third direction, satisfying 0.5mm≤d3≤2mm.

[0174] In the technical solution provided in this application embodiment, the two ends of the first insulating component 220 and the second insulating component 230 extend beyond the dimension d3 of the sampling component 210 along a third direction, satisfying 0.5mm≤d3≤2mm. On the one hand, the bonding area of ​​the first insulating component 220 and the second insulating component 230 is large enough to provide sufficient structural strength for the sampling component 210. On the other hand, the dimensions of the first insulating component 220 and the second insulating component 230 are not too large, thereby reducing the overall size of the sampling component 210.

[0175] Furthermore, the dimensions d3 of the first insulating component 220 and the second insulating component 230 extending beyond the sampling component 210 at both ends along a third direction can satisfy 0.8mm ≤ d3 ≤ 1.6mm. With d3 within this range, on the one hand, the bonding area of ​​the first insulating component 220 and the second insulating component 230 can be further increased; on the other hand, the reduced upper limit of the dimensions of the first insulating component 220 and the second insulating component 230 can further reduce the size of the sampling component 210.

[0176] The dimension d3 of the first insulating component 220 and the second insulating component 230 extending beyond the sampling component 210 along a third direction can also take other values. For example, d3 can take any of the following values ​​or any value between any two values: 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm.

[0177] In some embodiments, the arbitrary side length L5 of the portion of the first connecting portion 211 that is away from the surface of the battery cell 20 and is not covered by the second insulating member 230 satisfies 4mm≤L5≤20mm.

[0178] In the technical solution provided in this application embodiment, the arbitrary side length L5 of the part of the first connecting part 211 that is away from the surface of the battery cell 20 and is not covered by the second insulating component 230 satisfies 4mm≤L5≤20mm, thereby leaving enough connection area, which can reduce the possibility of connection failure during the connection of the first connecting part 211 and the busbar component 12, thereby improving the reliability of the battery device 10.

[0179] Furthermore, any side length L5 of the portion of the first connecting part 211 that is not covered by the second insulating member 230 on the surface of the battery cell 20 can satisfy 6mm≤L5≤10mm. With L5 within this range, on the one hand, the reliability of the connection during the connection of the first connecting part 211 and the busbar member 12 can be further improved, and on the other hand, the first connecting part 211 will not be too large, thus not occupying too much space.

[0180] Furthermore, the side length L5 of the portion of the first connecting portion 211 that is not covered by the second insulating member 230 away from the surface of the battery cell 20 can also take other values. For example, L5 can take any of the following values ​​or any two of the following values: 4.0mm, 5.0mm, 6.0mm, 7.0mm, 8.0mm, 9.0mm, 10.0mm, 11.0mm, 12.0mm, 13.0mm, 14.0mm, 15.0mm, 16.0mm, 17.0mm, 18.0mm, 19.0mm and 20.0mm.

[0181] In some embodiments, an insulating medium is filled between the first connecting portion 211 and the second connecting portion 212.

[0182] The insulating medium can be insulating materials such as polyimide, polyethylene terephthalate, and epoxy resin, but the embodiments in this application are not limited thereto.

[0183] In the technical solution provided in this application embodiment, an insulating medium is filled between the first connecting part 211 and the second connecting part 212. On the one hand, this can further improve the creepage distance between the first connecting part 211 and the second connecting part 212, reducing the possibility of internal short circuit in the sampling component 210. On the other hand, the insulating medium can support the various structures inside the sampling component 210. During use, even if the sampling component 210 is affected by impact vibration, the components inside the sampling component 210 are not prone to displacement or deformation, thereby improving the reliability of the battery device 10.

[0184] According to some embodiments of this application, this application also provides an electrical device including a battery device 10 of any of the above schemes, and the battery device 10 is used to provide electrical energy to the electrical device.

[0185] The power supply device can be any of the aforementioned devices or systems that utilize battery device 10.

[0186] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this 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. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, The battery device includes: Multiple battery cells (20); A busbar (12) is electrically connected to the plurality of battery cells (20). A sampling component (210) is disposed on the side of the busbar component (12) away from the battery cell (20). The sampling component (210) includes a first connecting part (211) and a second connecting part (212) disposed along a first direction. The first connecting part (211) and the second connecting part (212) are electrically connected. A first insulating component (220) is disposed between the sampling component (210) and the busbar component (12) and is stacked with the sampling component (210) along the second direction. The orthographic projection of the first insulating component (220) along the second direction covers the second connecting portion (212). The sampling line (13) and the control component (14) are connected, and the second connection part (212) is electrically connected to the control component (14) through the sampling line (13) to transmit information of the battery cell (20); The first connecting portion (211) further includes a first welding portion (2111), which extends beyond the edge of the first insulating member (220) along the first direction and is attached to the busbar member (12).

2. The battery device according to claim 1, characterized in that, The first connecting portion (211) and the second connecting portion (212) have a first gap (216), and the sampling component (210) further includes: A fuse (215) is disposed within the first interval (216), and the fuse (215) is electrically connected to the first connecting part (211) and the second connecting part (212). The minimum width of the fused portion (215) is less than the minimum width of the first connecting portion (211).

3. The battery device according to claim 2, characterized in that, The line connecting the two ends of the fuse (215) forms an angle with the first direction.

4. The battery device according to claim 2, characterized in that, The fuse section (215) is provided with multiple curved segments.

5. The battery device according to claim 2, characterized in that, The minimum width d1 of the fuse (215) satisfies 0 < d1 ≤ 0.15 mm, the thickness d2 of the fuse (215) satisfies 0 < d2 ≤ 75 μm, and the effective length L1 of the fuse (215) satisfies 6 mm ≤ L1 ≤ 20 mm.

6. The battery device according to claim 1, characterized in that, The side length L4 of any portion of the first connecting part (211) facing the battery cell (20) that is not covered by the first insulating member (220) satisfies 4mm≤L4≤20mm.

7. The battery device according to claim 1, characterized in that, The sampling component (210) further includes: The third connecting part (213) is electrically connected to the first connecting part (211); The third connecting part (213) further includes a second welding part (2131), which extends beyond the edge of the first insulating member (220) along the first direction and is attached to the busbar member (12).

8. The battery device according to claim 7, characterized in that, The third connecting part (213) and the first connecting part (211) are respectively disposed on both sides of the second connecting part (212) along the first direction; The sampling component (210) further includes a connecting arm (214), the third connecting part (213) is connected to the first connecting part (211) through the connecting arm (214), the connecting arm (214) is located on at least one side of the second connecting part (212) along a third direction and is spaced apart from the second connecting part (212), the first insulating component (220) is disposed between the connecting arm (214) and the busbar component (12); the third direction is perpendicular to the first direction.

9. The battery device according to claim 8, characterized in that, The first connecting portion (211) and the second connecting portion (212) have a first gap (216), and the sampling component (210) further includes: A fuse (215) is disposed within the first interval (216), and the fuse (215) is electrically connected to the first connecting part (211) and the second connecting part (212). The minimum width of the fused portion (215) is less than the minimum width of the first connecting portion (211), and the width of the connecting arm (214) is greater than the minimum width of the fused portion (215).

10. The battery device according to claim 2, characterized in that, The battery device also includes: The second insulating component (230) is disposed on the side of the sampling component (210) away from the battery cell (20) and is stacked with the sampling component (210) along the second direction; Along the second direction, the orthographic projection of the second insulating component (230) covers the first interval (216) but does not cover at least a portion of the second connection portion (212), and the control component (14) is electrically connected to the portion of the second connection portion (212) that is not covered by the second insulating component (230) on the surface of the battery cell (20).

11. The battery device according to claim 7, characterized in that, in, The second weld (2131) extends beyond the edge of the first insulating component (220) along the first direction.

12. The battery device according to claim 10, characterized in that, The long side dimension L2 and short side dimension L3 of the portion of the second connecting part (212) that is away from the surface of the battery cell (20) and is not covered by the second insulating component (230) satisfy 4mm≤L2≤20mm and 2mm≤L3≤10mm, respectively.

13. The battery device according to claim 10, characterized in that, Both ends of the first insulating component (220) and the second insulating component (230) extend beyond the sampling component (210) along a third direction, which is perpendicular to the first direction.

14. The battery device according to claim 13, characterized in that, The first insulating component (220) and the second insulating component (230) are bonded together along the third direction to the portion extending beyond the sampling component (210).

15. The battery device according to claim 13, characterized in that, The first insulating component (220) and the second insulating component (230) extend beyond the sampling component (210) at both ends along a third direction, where the dimension d3 satisfies 0.5mm ≤ d3 ≤ 2mm.

16. The battery device according to claim 15, characterized in that, The side length L5 of the portion of the first connecting part (211) that is away from the surface of the battery cell (20) and is not covered by the second insulating component (230) satisfies 4mm≤L5≤20mm.

17. The battery device according to any one of claims 1 to 16, characterized in that, An insulating medium is filled between the first connecting part (211) and the second connecting part (212).

18. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1 to 17, wherein the battery device is used to provide electrical energy.

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