Battery and electric device

Abstract

The utility model provides a battery and a power utilization device, and belongs to the technical field of batteries. The battery comprises a battery module, a safety device and a sampling assembly. The battery module comprises a confluence component and a plurality of battery cells, wherein the confluence component is electrically connected with the plurality of battery cells. The safety device and the confluence component are stacked in the first direction. And a sampling line of the sampling assembly is electrically connected with the confluence component through the safety device. The safety device comprises a conducting layer and a first insulating layer, the conducting layer comprises a first conducting area, a fuse and a second conducting area which are connected in sequence, the first conducting area and the second conducting area are arranged at intervals, and the first conducting area and the second conducting area are connected with the confluence component and the sampling line respectively; at least part of the first insulating layer is located between the second conductive region and the confluence component so as to insulate and isolate the second conductive region from the confluence component. The creepage distance between the second conductive area and the confluence component is increased, so that the risk that the safety device fails or is short-circuited after the second conductive area and the confluence component are lapped by mistake is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular, to a battery and an electrical device using the same. Background Art

[0002] In recent years, new energy vehicles have achieved leapfrog development. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role. With the strong promotion of new energy vehicles, the demand for power battery products is also increasing day by day. Among them, as the core component of new energy vehicles, the battery has high requirements for both use stability and reliability.

[0003] In battery technology, in order to ensure the safety of battery cells, a sampling assembly is generally provided in the battery. Through the sampling assembly, the voltage of the battery cells during use can be collected to obtain the usage condition of the battery. However, in the existing batteries, the sampling assembly or the battery cells are often damaged during use, resulting in poor use stability and short service life of the battery. Summary of the Utility Model

[0004] The embodiments of the present application provide a battery and an electrical device using the same, which can effectively improve the use stability and service life of the battery.

[0005] In a first aspect, the embodiments of the present application provide a battery, including a battery module, a fuse device, and a sampling assembly; the battery module includes a busbar component and a plurality of battery cells, and the busbar component is electrically connected to the plurality of battery cells; the fuse device and the busbar component are stacked in a first direction; the sampling assembly has a sampling wire, and the sampling wire is electrically connected to the busbar component through the fuse device; wherein, the fuse device includes a conductive layer and a first insulating layer, the conductive layer includes a first conductive region, a fuse, and a second conductive region, the first conductive region and the second conductive region are spaced apart, the first conductive region is connected to the busbar component, the second conductive region is connected to the sampling wire, the fuse connects the first conductive region and the second conductive region, and along the first direction, at least a part of the first insulating layer is located between the second conductive region and the busbar component to insulate and isolate the second conductive region and the busbar component.

[0006] In the above technical solution, a fuse device is provided on the busbar component of the battery module, and the sampling line of the sampling assembly is electrically connected to the busbar component through the fuse device, so that the sampling assembly can obtain and sample the voltage of the battery module to facilitate obtaining the usage condition of the battery. Among them, the fuse device is provided with a conductive layer and a first insulating layer. The conductive layer includes a first conductive region, a fuse, and a second conductive region that are sequentially connected. The first conductive region and the second conductive region are respectively connected to the busbar component and the sampling line to enable the sampling line of the sampling assembly to be electrically connected to the busbar component through the conductive layer. With this structure, on the one hand, when a short circuit occurs in the battery module or the sampling assembly, the fuse of the conductive layer can be blown to disconnect the electrical connection between the first conductive region and the second conductive region, thereby enabling the battery module and the sampling assembly to be open-circuited to alleviate the phenomenon that the battery module or the sampling assembly is further damaged. On the other hand, by providing a first insulating layer between the conductive layer and the busbar component, the first insulating layer can separate the second conductive region and the busbar component, which is beneficial to increasing the creepage distance between the second conductive region and the busbar component to reduce the risks such as the fuse device failing or short-circuiting caused by the accidental overlap between the second conductive region and the busbar component, and thus can effectively improve the usage stability and service life of the battery.

[0007] In some embodiments, along the first direction, the projection of the fuse device is located within the busbar component.

[0008] In the above technical solution, by setting the projection of the fuse device in the first direction to be entirely located within the busbar component, on the one hand, it can improve the assembly stability of the fuse device provided on the busbar component to reduce the risk of the fuse device falling off, and can alleviate the collision phenomenon between the fuse device and other components. On the other hand, it can reduce the overlap phenomenon between the conductive layer of the fuse device and other components to reduce the risk of internal short circuit occurring during the use of the battery, which is beneficial to improving the usage reliability of the battery.

[0009] In some embodiments, the fuse device further includes a second insulating layer; the second insulating layer and the first insulating layer are stacked and connected along the first direction; wherein, along the first direction, the conductive layer is disposed between the first insulating layer and the second insulating layer.

[0010] In the above technical solution, the insurance device is further provided with a second insulating layer, and the second insulating layer and the first insulating layer are stacked and connected along the first direction, so that the first insulating layer and the second insulating layer can play a role of clamping and assembling the conductive layer. For a battery adopting this structure, on the one hand, insulating structures can be formed on both sides of the conductive layer in the first direction, which is beneficial to further increasing the creepage distance between the conductive layer and other components, and is also beneficial to further reducing the lap phenomenon between the conductive layer and other components, thereby further reducing the risk of internal short circuit during the use of the battery and improving the use reliability of the battery. On the other hand, the first insulating layer and the second insulating layer can play a certain stabilizing role on the conductive layer, which is beneficial to further improving the assembly stability of the insurance device on the busbar component.

[0011] In some embodiments, a gap is formed between the first conductive region and the second conductive region; wherein, along the first direction, the regions of the first insulating layer and the second insulating layer corresponding to the gap are connected to each other to separate the first conductive region and the second conductive region.

[0012] In the above technical solution, by connecting the portions of the first insulating layer and the second insulating layer corresponding to the gap between the first conductive region and the second conductive region in the first direction, the first insulating layer and the second insulating layer can also play a role of insulating and isolating the first conductive layer and the second conductive layer, thereby realizing the physical separation between the first conductive region and the second conductive region, increasing the creepage distance between the first conductive region and the second conductive region, and further alleviating the phenomenon of mis-lap between the first conductive region and the second conductive region, which is beneficial to reducing the risk of failure of the insurance device.

[0013] In some embodiments, the edge region of the first insulating layer and the edge region of the second insulating layer are connected to each other, and the first insulating layer and the second insulating layer jointly define an accommodating space, and the conductive layer is accommodated in the accommodating space.

[0014] In the above technical solution, by connecting the edge region of the first insulating layer and the edge region of the second insulating layer to each other, the first insulating layer and the second insulating layer can jointly form an accommodating space for accommodating the conductive layer. For a battery with this structure, on the one hand, the lap phenomenon between the conductive layer and other components can be further reduced, thereby further reducing the risk of internal short circuit during the use of the battery and improving the use reliability of the battery. On the other hand, the stabilizing effect of the first insulating layer and the second insulating layer on the conductive layer is further improved, which is beneficial to improving the structural stability of the insurance device and further improving the assembly stability of the insurance device on the busbar component.

[0015] In some embodiments, the first insulating layer is provided with a first window, and the first window is configured to expose a part of the first conductive region, and the exposed part of the first conductive region is connected to the bus bar component.

[0016] In the above technical solution, the first insulating layer is provided with a first window, and the first window can expose a part of the first conductive region of the conductive layer in the first direction, so as to facilitate the connection between the bus bar component and the exposed region of the first conductive region, which is beneficial to reducing the connection difficulty between the bus bar component and the first conductive region, and can improve the connection quality between the bus bar component and the first conductive region.

[0017] In some embodiments, along the first direction, the projection of the first window is located within the first conductive region.

[0018] In the above technical solution, by setting the projection of the first window in the first direction to be entirely located within the first conductive region, on the one hand, it can alleviate the phenomenon that the exposed area of the first conductive region is too large, so as to reduce the overlap risk between the first conductive region and other components, and on the other hand, it can alleviate the phenomenon that the edge of the first conductive region is exposed, which is beneficial to improving the stability of the first conductive region assembled between the first insulating layer and the second insulating layer, and thus can reduce the risk of the first conductive region falling off from the first window.

[0019] In some embodiments, the first conductive region is connected to the bus bar component by welding, and the second insulating layer is provided with a second window, and the second window is configured to expose a part of the first conductive region; wherein, at least a part of the projections of the second window and the first window in the first direction overlap.

[0020] In the above technical solution, by providing a second window on the second insulating layer that can expose a part of the first conductive region, and at least a part of the projection of the second window in the first direction is located within the first window, it is possible to weld the first conductive region and the bus bar component from the side of the first conductive region facing away from the bus bar component and corresponding to the position of the second window. On the one hand, it can reduce the difficulty of welding and assembling the first conductive region and the bus bar component, so as to improve the assembly efficiency of the battery, and on the other hand, it can achieve that when welding the first conductive region and the bus bar component, it is not necessary to penetrate the second insulating layer, which is beneficial to reducing the welding power required for welding the first conductive region and the bus bar component, and can effectively improve the welding quality between the first conductive region and the bus bar component.

[0021] In some embodiments, the projections of the second window and the first window in the first direction coincide with each other.

[0022] In the above technical solution, by setting the second window and the first window to have a structure where their projections coincide in the first direction, when welding to connect the first conductive region and the bus bar component, there is no need to position the overlapping region of the second window and the first window in the first direction, which is beneficial to further reducing the difficulty of welding and assembling the first conductive region and the bus bar component with each other, so as to improve the assembly efficiency of the battery.

[0023] In some embodiments, along the first direction, the projection of the second window is located within the first conductive region.

[0024] In the above technical solution, by setting the projection of the second window in the first direction to be entirely located within the first conductive region, on the one hand, it can alleviate the phenomenon that the exposed area of the first conductive region is too large, so as to reduce the overlap risk between the first conductive region and other components, and on the other hand, it can alleviate the phenomenon that the edge of the first conductive region is exposed, which is beneficial to improving the stability of the first conductive region assembled between the first insulating layer and the second insulating layer, and thus can reduce the risk of the first conductive region falling off from the second window.

[0025] In some embodiments, the second insulating layer is provided with a third window, and the third window is configured to expose a part of the second conductive region, and the exposed part of the second conductive region is connected to the sampling line.

[0026] In the above technical solution, the second insulating layer is provided with a third window, and the third window can expose a part of the second conductive region of the conductive layer in the first direction, so as to facilitate the connection between the sampling line and the exposed area of the second conductive region, which is beneficial to reducing the connection difficulty between the sampling line and the second conductive region, and can improve the connection quality between the sampling line and the second conductive region.

[0027] In some embodiments, along the first direction, the projection of the third window is located within the second conductive region.

[0028] In the above technical solution, by setting the projection of the third window in the first direction to be entirely located within the second conductive region, on the one hand, it can alleviate the phenomenon that the exposed area of the second conductive region is too large, so as to reduce the overlap risk between the second conductive region and other components, and on the other hand, it can alleviate the phenomenon that the edge of the second conductive region is exposed, which is beneficial to improving the stability of the second conductive region assembled between the first insulating layer and the second insulating layer, and thus can reduce the risk of the second conductive region falling off from the third window.

[0029] In some embodiments, the first insulating layer and the second insulating layer are thermally compounded and connected.

[0030] In the above technical solution, the first insulating layer and the second insulating layer are connected by a thermocompound connection structure. On the one hand, it can improve the connection reliability between the first insulating layer and the second insulating layer, so as to enhance the structural stability and reliability of the conductive layer disposed between the first insulating layer and the second insulating layer. On the other hand, it can reduce the assembly difficulty of the first insulating layer and the second insulating layer, so as to improve the assembly efficiency of the insurance device.

[0031] In some embodiments, the first conductive region is welded to the bus bar component, and the second conductive region is welded to the sampling wire.

[0032] In the above technical solution, by setting the first conductive region and the bus bar component to be welded to each other, it is beneficial to improve the connection reliability between the first conductive region and the bus bar component, so as to reduce the risk of the insurance device failing due to the separation of the first conductive region and the bus bar component, and it is beneficial to improve the overcurrent capacity between the first conductive region and the bus bar component. Similarly, by setting the second conductive region and the sampling wire to be welded to each other, it is beneficial to improve the connection reliability between the second conductive region and the sampling wire, so as to reduce the risk of the insurance device failing due to the separation of the second conductive region and the sampling wire, and it is beneficial to improve the overcurrent capacity between the second conductive region and the sampling wire.

[0033] In some embodiments, the conductive layer includes a first foil and a second foil that are compound-connected along the first direction. The first foil is located on the side of the second foil facing the bus bar component in the first direction. The part of the first foil located in the first conductive region is welded to the bus bar component, and the part of the second foil located in the second conductive region is welded to the sampling wire; wherein, the material of the bus bar component is different from the material of the sampling wire, the material of the first foil is the same as the material of the bus bar component, and the material of the second foil is the same as the material of the sampling wire.

[0034] In the above technical solution, the conductive layer is provided with a first foil and a second foil that are connected in a composite manner along the first direction, and the first foil is located on the side of the second foil facing the bus bar component in the first direction. By setting the material of the first foil to be the same as the material of the bus bar component, and welding the part of the first foil located in the first conductive region to the bus bar component. Similarly, by setting the material of the second foil to be the same as the material of the sampling line, and welding the part of the second foil located in the second conductive region to the sampling line, a structure in which the first conductive region and the bus bar component are welded with the same material is achieved, and a structure in which the second conductive region and the sampling line are welded with the same material can be achieved. On the one hand, the welding difficulty between the first conductive region and the bus bar component and between the second conductive region and the sampling line can be reduced, and on the other hand, the quality problems caused by welding between different materials can be alleviated, which is beneficial to improving the welding quality between the first conductive region and the bus bar component and between the second conductive region and the sampling line.

[0035] In some embodiments, the materials of the conductive layer, the bus bar component, and the sampling line are all the same.

[0036] In the above technical solution, by setting the conductive layer, the bus bar component, and the sampling line of the fuse device to have the same material structure, a structure in which the first conductive region and the bus bar component and the second conductive region and the sampling line are all welded with the same material is achieved. On the one hand, the welding difficulty between the first conductive region and the bus bar component and between the second conductive region and the sampling line can be reduced, and on the other hand, the quality problems caused by welding between different materials can be alleviated, which is beneficial to improving the welding quality between the first conductive region and the bus bar component and between the second conductive region and the sampling line.

[0037] In some embodiments, the material of the bus bar component is different from the material of the sampling line, the material of the first conductive region is the same as the material of the bus bar component, and the material of the second conductive region is the same as the material of the sampling line.

[0038] In the above technical solution, by setting the material of the first conductive region of the conductive layer to be the same as the material of the bus bar component, and setting the material of the second conductive region of the conductive layer to be the same as the material of the sampling line, a structure in which the first conductive region and the bus bar component are welded with the same material is achieved, and a structure in which the second conductive region and the sampling line are welded with the same material can be achieved. On the one hand, the welding difficulty between the first conductive region and the bus bar component and between the second conductive region and the sampling line can be reduced, and on the other hand, the quality problems caused by welding between different materials can be alleviated, which is beneficial to improving the welding quality between the first conductive region and the bus bar component and between the second conductive region and the sampling line.

[0039] In some embodiments, the first conductive region includes a first portion, a second portion, and a third portion that are sequentially connected. The first portion and the third portion are disposed opposite to each other along a second direction, and the second direction is perpendicular to the first direction.

[0040] In the above technical solution, by setting the first conductive region as a first portion, a second portion, and a third portion that are sequentially connected, and the first portion and the third portion are disposed opposite to each other along the second direction to form a first conductive region in a shape similar to a "C", the fuse device adopting this structure can increase the effective welding area between the first conductive region of the conductive layer and the busbar component, and can further improve the assembly stability of the fuse device disposed on the busbar component.

[0041] In some embodiments, along the second direction, the second conductive region is located between the first portion and the third portion, and both ends of the fuse are respectively connected to the second conductive region and the third portion.

[0042] In the above technical solution, by setting the second conductive region of the conductive layer to be located between the first portion and the third portion in the second direction, so that the second conductive region is a structure located inside the first conductive region. The fuse device adopting this structure can, on the one hand, optimize the space occupied by the conductive layer and improve the overall structural strength of the fuse device, and on the other hand, can reduce the difficulty of connecting the fuse to the first conductive region and the second conductive region, so as to reduce the manufacturing difficulty of the conductive layer.

[0043] In some embodiments, along the first direction, the busbar component is connected to one side of the battery cell, and the fuse device is disposed on the side of the busbar component away from the battery cell.

[0044] In the above technical solution, by connecting the busbar component to one side of the battery cell in the first direction and disposing the fuse device on the side of the busbar component away from the battery cell in the first direction, it is beneficial to reduce the assembly difficulty between the fuse device and the busbar component, and can reduce the connection difficulty between the sampling line and the fuse device, thereby improving the assembly efficiency of the battery.

[0045] In a second aspect, an electrical device provided by an embodiment of the present application further includes the above battery, and the battery is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0047] Figure 1 A structural schematic diagram of a vehicle provided for some embodiments of the present application;

[0048] Figure 2 An exploded view of the structure of a battery provided for some embodiments of the present application;

[0049] Figure 3 A top view of the battery module and the sampling assembly after being assembled with each other provided for some embodiments of the present application;

[0050] Figure 4 is Figure 3 A partially enlarged view of part A after the battery module and the sampling assembly shown in FIG.

[0051] Figure 5 A partial structural schematic diagram of a battery module provided for some embodiments of the present application;

[0052] Figure 6 An assembly schematic diagram of a busbar component and a fuse device provided for some embodiments of the present application;

[0053] Figure 7 A structural schematic diagram of a fuse device provided for some embodiments of the present application;

[0054] Figure 8 An exploded view of the structure of a fuse device provided for some embodiments of the present application;

[0055] Figure 9 A structural schematic diagram of the conductive layer of a fuse device provided for some embodiments of the present application;

[0056] Figure 10 A front view of the fuse device facing the first insulating layer in the first direction provided for some embodiments of the present application;

[0057] Figure 11 A front view of the fuse device facing the second insulating layer in the first direction provided for some embodiments of the present application;

[0058] Figure 12 A cross-sectional view of the conductive layer of the fuse device perpendicular to the second direction provided for some embodiments of the present application.

[0059] Icons: 1000 - Vehicle; 100 - Battery; 10 - Box; 11 - First box body; 12 - Second box body; 20 - Battery module; 21 - Battery cell; 211 - Electrode terminal; 22 - Busbar component; 30 - Sampling assembly; 31 - Sampling wire; 40 - Fuse device; 41 - Conductive layer; 411 - First conductive region; 4111 - First part; 4112 - Second part; 4113 - Third part; 412 - Fuse; 413 - Second conductive region; 414 - Gap; 415 - First foil; 416 - Second foil; 42 - First insulating layer; 421 - First window; 43 - Second insulating layer; 431 - Second window; 432 - Third window; 50 - Insulating part; 200 - Controller; 300 - Motor; X - First direction; Y - Second direction; Z - Third direction. Detailed implementation

[0060] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0061] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs; the terms used in the specification of the present 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 drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of the present application or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0062] Referring to "embodiments" in the present application means that specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0063] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "linkage", and "attachment" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0064] In the present application, the term "and / or" is merely an association relationship describing associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects before and after.

[0065] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width, etc. of various components shown in the drawings in the embodiments of the present application, as well as the overall thickness, length, width, etc. of the integrated device are only illustrative and should not constitute any limitation to the present application.

[0066] The term "a plurality of" as used in the present application refers to two or more (including two).

[0067] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can activate the active material and continue to be used by charging after discharging.

[0068] The battery cell can be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-metal hydride battery, a nickel-cadmium battery, a lead-acid battery, etc., and the embodiments of the present application do not limit this.

[0069] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charge and discharge process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can prevent the short circuit between the positive and negative electrodes and at the same time allow the active ions to pass through.

[0070] In some embodiments, the positive electrode can be a positive electrode sheet, and the positive electrode sheet can include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

[0071] As an example, the positive electrode current collector has two surfaces opposite to each other in its own thickness direction, and the positive electrode active material is disposed on any one or both of the two opposite surfaces of the positive electrode current collector.

[0072] As an example, the positive electrode current collector can be a metal foil or a composite current collector. For example, as the metal foil, aluminum with a silver-plated surface, stainless steel with a silver-plated surface, stainless steel, copper, aluminum, nickel, carbon electrode, carbon, nickel, or titanium, etc. can be used. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (such as aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0073] As an example, the positive electrode active material can include at least one of the following materials: lithium-containing phosphate, lithium transition metal oxide, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as the positive electrode active material of the battery can also be used. These positive electrode active materials can be used alone or in combination of two or more. Among them, examples of the lithium-containing phosphate can include but are not limited to lithium iron phosphate (such as LiFePO 4 (which can also be abbreviated as LFP)), a composite material of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO 4 ), a composite material of lithium manganese phosphate and carbon, lithium manganese iron phosphate, and at least one of a composite material of lithium manganese iron phosphate and carbon. Examples of the lithium transition metal oxide can include but are not limited to lithium cobalt oxide (such as LiCoO 2 ), lithium nickel oxide (such as LiNiO 2 ), lithium manganese oxide (such as LiMnO 2 , LiMn 2 O 4 ), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3 Mn 1 / 3 O 2 (which can also be abbreviated as NCM 333 ), LiNi 0.5 Co 0.2 Mn 0.3 O 2 (which can also be abbreviated as NCM 523 ), LiNi 0.5 Co 0.25 Mn 0.25 O 2 (which can also be abbreviated as NCM 211 ), LiNi 0.6 Co 0.2 Mn 0.2 O 2 (which can also be abbreviated as NCM 622 )、LiNi0.8 Co 0.1 Mn 0.1 O 2 (which can also be abbreviated as NCM 811 )、lithium nickel cobalt aluminum oxide (such as LiNi 0.85 Co 0.15 Al 0.05 O 2 ) and at least one of its modified compounds, etc.

[0074] In some embodiments, the positive electrode can adopt a foam metal. The foam metal can be foam nickel, foam copper, foam aluminum, foam alloy, etc. When the foam metal is used as the positive electrode, the positive electrode active material may not be provided on the surface of the foam metal, and of course, the positive electrode active material can also be provided. As an example, a lithium source material, potassium metal or sodium metal can also be filled or / and deposited in the foam metal, and the lithium source material is lithium metal and / or lithium-rich material.

[0075] In some embodiments, the negative electrode can be a negative electrode sheet, and the negative electrode sheet can include a negative electrode current collector.

[0076] As an example, the negative electrode current collector can adopt a metal foil, a foam metal or a composite current collector. For example, as the metal foil, aluminum or stainless steel with a silver surface treatment, stainless steel, copper, aluminum, nickel, carbon electrode, nickel or titanium, etc. can be used. The foam metal can be foam nickel, foam copper, foam aluminum, foam alloy, etc. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by forming a metal material (such as copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver and silver alloy, etc.) on a polymer material substrate (such as a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

[0077] As an example, the negative electrode sheet can include a negative electrode current collector and a negative electrode active material provided on at least one surface of the negative electrode current collector.

[0078] As an example, the negative electrode current collector has two surfaces opposite to each other in its own thickness direction, and the negative electrode active material is provided on any one or both of the two opposite surfaces of the negative electrode current collector.

[0079] As an example, the negative electrode active material can be the negative electrode active material for battery cells known in the art. As an example, the negative electrode active material can include at least one of the following materials: artificial graphite, natural graphite, soft carbon, hard carbon, silicon-based materials, tin-based materials, and lithium titanate, etc. The silicon-based materials can be selected from at least one of elemental silicon, silicon oxides, silicon-carbon composites, silicon-nitrogen composites, and silicon alloys. The tin-based materials can be selected from at least one of elemental tin, tin oxides, and tin alloys. However, the present application is not limited to these materials, and other conventional materials that can be used as battery negative electrode active materials can also be used. These negative electrode active materials can be used alone or in combination of two or more.

[0080] In some embodiments, the material of the positive electrode current collector can be aluminum, and the material of the negative electrode current collector can be copper.

[0081] In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

[0082] In some embodiments, the separator is a separator membrane. The types of the separator membrane can be various, and any known porous structure separator membrane with good chemical stability and mechanical stability can be selected.

[0083] As an example, the material of the separator membrane can include at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, and polyvinylidene fluoride. The separator membrane can be a single-layer film or a multi-layer composite film. When the separator membrane is a multi-layer composite film, the materials of each layer can be the same or different. The separator can be a single component located between the positive and negative electrodes, or can be attached to the surfaces of the positive and negative electrodes.

[0084] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive electrode and the negative electrode, and simultaneously functions to transport ions and isolate the positive and negative electrodes.

[0085] In some embodiments, the battery cell further includes an electrolyte, and the electrolyte functions to conduct ions between the positive and negative electrodes. The electrolyte can be liquid, gel, or solid. Among them, the liquid electrolyte includes electrolyte salts and solvents.

[0086] In some embodiments, the electrolyte salts can include at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bis(fluorosulfonyl)imide, lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluorooxalate borate, lithium bis(oxalate) borate, lithium difluoro bis(oxalate) phosphate, and lithium tetrafluorooxalate phosphate.

[0087] In some embodiments, the solvent may include at least one of ethylene carbonate, propylene carbonate, ethyl methyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, sulfolane, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent may also be an ether solvent. The ether solvent may include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyltetrahydrofuran, diphenyl ether, and crown ether.

[0088] Among them, the gel electrolyte includes a polymer as the electrolyte framework network, combined with an ionic liquid-lithium salt.

[0089] Among them, the solid electrolyte includes a polymer solid electrolyte, an inorganic solid electrolyte, and a composite solid electrolyte.

[0090] As an example, the polymer solid electrolyte may be polyether (polyethylene oxide), polysiloxane, polycarbonate, polyacrylonitrile, polyvinylidene fluoride, polymethyl methacrylate, single-ion polymer, polyionic liquid-lithium salt, cellulose, etc.

[0091] As an example, the inorganic solid electrolyte may include an oxide solid electrolyte (crystalline perovskite, sodium superionic conductor, garnet, amorphous LiPON film), a sulfide solid electrolyte (crystalline lithium superionic conductor (lithium germanium phosphorus sulfur, argyrodite), amorphous sulfide), and one or more of a halide solid electrolyte, a nitride solid electrolyte, and a hydride solid electrolyte.

[0092] As an example, the composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to the polymer solid electrolyte.

[0093] In some embodiments, the electrode assembly is a wound structure. The positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0094] In some embodiments, the electrode assembly is a stacked structure.

[0095] As an example, multiple positive electrode sheets and multiple negative electrode sheets may be provided respectively, and the multiple positive electrode sheets and the multiple negative electrode sheets are alternately stacked.

[0096] As an example, multiple positive electrode sheets may be provided, and the negative electrode sheet is folded to form multiple stacked folding segments, and a positive electrode sheet is clamped between adjacent folding segments.

[0097] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form multiple stacked folding segments.

[0098] As an example, a plurality of separators may be provided and respectively disposed between any adjacent positive electrode plates or negative electrode plates.

[0099] As an example, the separators may be continuously provided and disposed between any adjacent positive electrode plates or negative electrode plates by folding or winding.

[0100] In some embodiments, the shape of the electrode assembly may be cylindrical, flat, prismatic, or the like.

[0101] In some embodiments, the electrode assembly is provided with tabs, and the tabs can conduct current out of the electrode assembly. The tabs include positive tabs and negative tabs.

[0102] In some embodiments, the battery cell may include a housing. The housing is used to encapsulate components such as the electrode assembly and the electrolyte. The housing may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite housing), or an aluminum-plastic film, etc.

[0103] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell of other shapes. The prismatic battery cell includes, but is not limited to, a square-shell battery cell, a blade-shaped battery cell, a multi-prismatic battery, and the multi-prismatic battery is, for example, a hexagonal prism battery, etc.

[0104] 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.

[0105] In some embodiments, the battery may be a battery module. When there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0106] In some embodiments, the battery may be a battery pack. The battery pack includes a box body and battery cells, and the battery cells or battery modules are accommodated in the box body.

[0107] In some embodiments, the box body may be part of the chassis structure of a vehicle. For example, a part of the box body may become at least a part of the floor of the vehicle, or a part of the box body may become at least a part of the cross beam and longitudinal beam of the vehicle.

[0108] In some embodiments, the battery may be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0109] The battery has outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide adaptability, and small self-discharge coefficient, and is an important part of the development of new energy today. The development of battery technology needs to consider various design factors at the same time. For example, performance parameters such as energy density, cycle life, discharge capacity, charge and discharge rate, etc. In addition, the safety of the battery also needs to be considered.

[0110] For a general battery cell, the battery includes a box body and a plurality of battery cells disposed in the box body. The plurality of battery cells are electrically connected through a busbar component to achieve series or parallel connection between the plurality of battery cells. In the related art, in order to ensure the safety of the battery cell, a sampling assembly is generally disposed in the battery. By connecting the sampling line of the sampling assembly to the busbar component, the sampling assembly can collect the voltage of the battery cell during use, so as to obtain the usage situation of the battery. However, when a short circuit occurs between the plurality of battery cells in this structure of the battery, it is extremely easy to cause damage to the sampling assembly, or when a short circuit occurs in the sampling assembly, it is extremely easy to cause damage to the battery cell and the circuit between the battery cells, resulting in poor use stability and short service life of the battery.

[0111] Based on the above considerations, in order to solve the problems of poor use stability and short service life of the battery, the embodiment of the present application provides a battery, which includes a battery module, a fuse device, and a sampling assembly. The battery module includes a busbar component and a plurality of battery cells, and the busbar component is electrically connected to the plurality of battery cells. The fuse device is stacked with the busbar component along a first direction. The sampling assembly has a sampling line, and the sampling line is electrically connected to the busbar component through the fuse device. The fuse device includes a conductive layer and a first insulating layer. The conductive layer includes a first conductive region, a fuse, and a second conductive region. The first conductive region and the second conductive region are spaced apart. The first conductive region is connected to the busbar component, and the second conductive region is connected to the sampling line. The fuse connects the first conductive region and the second conductive region. Along the first direction, at least a part of the first insulating layer is located between the second conductive region and the busbar component to insulate and isolate the second conductive region and the busbar component.

[0112] In a battery with such a structure, a protection device is provided on the busbar component of the battery module, and the sampling line of the sampling assembly is electrically connected to the busbar component through the protection device, so that the sampling assembly can obtain and sample the voltage of the battery module, facilitating the acquisition of the battery's usage status. Among them, the protection device is provided with a conductive layer and a first insulating layer. The conductive layer includes a first conductive region, a fuse, and a second conductive region connected in sequence. The first conductive region and the second conductive region are respectively connected to the busbar component and the sampling line to enable the sampling line of the sampling assembly to be electrically connected to the busbar component through the conductive layer. With this battery structure, on the one hand, when a short circuit occurs in the battery module or the sampling assembly, the fuse in the conductive layer can be melted to disconnect the electrical connection between the first conductive region and the second conductive region, thereby enabling the battery module and the sampling assembly to be open-circuited, alleviating the phenomenon of further damage to the battery module or the sampling assembly. On the other hand, by providing the first insulating layer between the conductive layer and the busbar component, the first insulating layer can separate the second conductive region and the busbar component, which is conducive to increasing the creepage distance between the second conductive region and the busbar component, reducing the risks such as the failure or short circuit of the protection device caused by the mis-lap between the second conductive region and the busbar component, and thus effectively improving the usage stability and service life of the battery.

[0113] The battery disclosed in the embodiments of the present application can be used, but is not limited to, power-consuming devices such as vehicles, ships, or aircraft. A power supply system of the power-consuming device can be composed of the battery disclosed in the present application. In this way, it is beneficial to alleviate the problem of damage to battery cells or sampling assemblies during the use of the battery, and improve the usage stability and service life of the battery.

[0114] The embodiments of the present application provide a power-consuming device using a battery as a power source. The power-consuming device can be, but is not limited to, mobile phones, tablets, laptop computers, electric toys, power tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0115] For the convenience of description in the following embodiments, a vehicle is taken as an example of a power-consuming device in an embodiment of the present application for illustration.

[0116] Please refer to Figure 1 , Figure 1Schematic structural diagram of vehicle 1000 provided by some embodiments of the present application. Vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, etc. A battery 100 is disposed inside vehicle 1000. The battery 100 can be disposed at the bottom of vehicle 1000, or at the head of vehicle 1000, or at the tail of vehicle 1000. The battery 100 can be used to supply power to vehicle 1000. For example, the battery 100 can be used as the operating power source or the power source for use of vehicle 1000. Vehicle 1000 can also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of vehicle 1000.

[0117] In some embodiments of the present application, the battery 100 can not only be used as the operating power source or the power source for use of vehicle 1000, but also be used as the driving power source of vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for vehicle 1000.

[0118] Please refer to Figure 2 and Figure 3 , Figure 2 Exploded view of the structure of battery 100 provided by some embodiments of the present application. Figure 3 Top view of the battery module 20 and the sampling assembly 30 after being assembled with each other provided by some embodiments of the present application. The battery 100 includes a box body 10 and at least one battery module 20. The battery module 20 is accommodated in the box body 10. The battery module 20 includes a plurality of battery cells 21 stacked along the second direction Y.

[0119] Among them, the box body 10 is used to provide an assembly space for the battery module 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 can include a first box body 11 and a second box body 12. The first box body 11 and the second box body 12 are covered with each other along the first direction X. The first box body 11 and the second box body 12 jointly define an assembly space for accommodating the battery module 20. The second box body 12 can be a hollow structure with one end open. The first box body 11 can be a plate-like structure. The first box body 11 is covered on the open side of the second box body 12 so that the first box body 11 and the second box body 12 jointly define the assembly space. The first box body 11 and the second box body 12 can also both be hollow structures with one side open, and the open side of the first box body 11 is covered on the open side of the second box body 12.

[0120] Of course, the box body 10 formed by the first box body 11 and the second box body 12 can have various shapes, such as a cylinder, a cuboid, or a cube, etc. Exemplarily, in Figure 2 , the shape of the box body 10 is a cuboid.

[0121] It should be noted that, in some embodiments, the battery 100 may not be provided with the box body 10. The battery 100 includes one battery module 20 or multiple battery modules 20, and the battery 100 composed of one battery module 20 or multiple battery modules 20 can be directly assembled onto the electrical device, so as to provide electrical energy for the electrical device through the multiple battery cells 21 in the battery module 20. That is to say, the box body 10 can be a part of the electrical device. Taking the vehicle 1000 as an example of the electrical device, the box body 10 can be a part of the chassis structure of the vehicle 1000. For example, a part of the box body 10 can become at least a part of the floor of the vehicle 1000, or a part of the box body 10 can become at least a part of the cross beam and longitudinal beam of the vehicle 1000.

[0122] Optionally, in the battery 100, the number of battery modules 20 accommodated in the box body 10 can be one or multiple. When there are multiple battery modules 20 arranged in the box body 10, the multiple battery modules 20 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that there are both series and parallel connections among the multiple battery modules 20. The multiple battery modules 20 can be directly connected in series, in parallel, or in a mixed connection together, and then the whole formed by the multiple battery modules 20 is accommodated in the box body 10.

[0123] Exemplarily, in combination with Figure 2 and Figure 3 as shown, the battery 100 includes two battery modules 20. The two battery modules 20 are arranged side by side along the third direction Z, and the two battery modules 20 are connected in series. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs.

[0124] In Figure 2 and Figure 3 , each battery module 20 includes a busbar component 22 and multiple battery cells 21 stacked along the second direction Y. The busbar component 22 is located on one side of the multiple battery cells 21 in the first direction X, and the busbar component 22 is used to connect the multiple battery cells 21 to achieve electrical connection among the multiple battery cells 21. Exemplarily, the first direction X is the height direction of the battery cell 21, the second direction Y is the thickness direction of the battery cell 21, and the third direction Z is the length direction of the battery cell 21.

[0125] Among them, referring to Figure 3 , and please further refer to Figure 4 and Figure 5 , Figure 4 is Figure 3 a partial enlarged view of the A position after the battery module 20 and the sampling assembly 30 shown in Figure 5Schematic diagram of a partial structure of the battery module 20 provided by some embodiments of the present application. At one end of the battery cell 21 in the first direction X, two electrode terminals 211 are provided. The polarities of the two electrode terminals 211 are opposite. The two electrode terminals 211 are respectively used to input or output the positive and negative electrodes of the battery cell 21. The busbar component 22 is connected to the electrode terminals 211 of the battery cell 21 to electrically connect a plurality of battery cells 21. It should be noted that the plurality of battery cells 21 in the battery module 20 can be in a series or parallel structure. Exemplarily, in Figure 3 , the plurality of battery cells 21 in the battery module 20 are in a structure that is sequentially connected in series through a plurality of busbar components 22.

[0126] Optionally, each battery cell 21 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 21 can be in the shape of a cuboid, a cylinder, a prism, or other shapes. Exemplarily, in Figure 2 , the battery cell 21 is in a cuboid structure.

[0127] In some embodiments, referring to Figure 2 , Figure 3 and Figure 4 as shown, the battery 100 may further include a sampling assembly 30. The sampling assembly 30 is disposed in the box body 10. The sampling assembly 30 is used to be electrically connected to the battery management system of the battery 100. The sampling assembly 30 has a sampling wire 31. The sampling wire 31 is electrically connected to the busbar component 22 to obtain the voltage of the battery cell 21.

[0128] Wherein, a fuse device 40 is provided on the busbar component 22. The sampling wire 31 of the sampling assembly 30 is electrically connected to the busbar component 22 through the fuse device 40. The fuse device 40 is configured to open the circuit when a short circuit occurs in the battery module 20 or the sampling assembly 30, so as to disconnect the electrical connection between the sampling wire 31 and the busbar component 22.

[0129] According to some embodiments of the present application, referring to Figure 2 , Figure 4 and Figure 5 , and further referring to Figure 6 , Figure 7 and Figure 8 , Figure 6 is an assembly schematic diagram of the busbar component 22 and the fuse device 40 provided by some embodiments of the present application, Figure 7 is a structural schematic diagram of the fuse device 40 provided by some embodiments of the present application, Figure 8An exploded view of the structure of the safety device 40 provided in some embodiments of the present application. The present application provides a battery 100, which includes a battery module 20, a safety device 40 and a sampling assembly 30. The battery module 20 includes a busbar 22 and a plurality of battery cells 21, and the busbar 22 is electrically connected to the plurality of battery cells 21. The safety device 40 and the busbar 22 are stacked along a first direction X. The sampling assembly 30 has a sampling line 31, and the sampling line 31 is electrically connected to the busbar 22 through the safety device 40. The fuse device 40 includes a conductive layer 41 and a first insulating layer 42. The conductive layer 41 includes a first conductive area 411, a fuse 412 and a second conductive area 413. The first conductive area 411 and the second conductive area 413 are arranged at intervals. The first conductive area 411 is connected to the bus component 22, and the second conductive area 413 is connected to the sampling line 31. The fuse 412 connects the first conductive area 411 and the second conductive area 413. Along the first direction X, at least a portion of the first insulating layer 42 is located between the second conductive area 413 and the bus component 22 to insulate and isolate the second conductive area 413 and the bus component 22.

[0130] The busbar component 22 in the battery module 20 serves to electrically connect the electrode terminals 211 of the plurality of battery cells 21 . The busbar component 22 may be made of a variety of materials, such as copper, aluminum or alloy.

[0131] The safety device 40 and the confluence component 22 are stacked along the first direction X. That is, the safety device 40 is arranged on one side of the confluence component 22 in the first direction X. For example, Figure 4 and Figure 5 In the embodiment, the busbar component 22 is connected to one side of the battery cell 21 in the first direction X, and the safety device 40 is arranged on the side of the busbar component 22 away from the battery cell 21 in the first direction X. Of course, in other embodiments, the safety device 40 can also be arranged on the side of the busbar component 22 facing the battery cell 21 in the first direction X.

[0132] The sampling assembly 30 has a sampling line 31, and the sampling line 31 is electrically connected to the confluence component 22 through the safety device 40. That is, the sampling assembly 30 has a sampling line 31 for interconnecting with the safety device 40. It should be noted that the sampling assembly 30 can be used to obtain the voltage of the battery module 20 or the current of the sampling assembly 30. The specific structure of the sampling assembly 30 can be referred to the relevant technology and will not be repeated here.

[0133] Optionally, the sampling assembly 30 may include a plurality of sampling lines 31 , and each sampling line 31 is electrically connected to a conduit component 22 via a safety device 40 .

[0134] The conductive layer 41 includes a first conductive region 411, a fuse 412, and a second conductive region 413. The first conductive region 411 and the second conductive region 413 are spaced apart. That is to say, the first conductive region 411 and the second conductive region 413 of the conductive layer 41 are structures that do not contact each other, and the first conductive region 411 and the second conductive region 413 are electrically connected through the fuse 412.

[0135] Among them, the first conductive region 411 is connected to the bus bar component 22, and the connection structure between the first conductive region 411 and the bus bar component 22 can be various. For example, welding connection, clamping connection, or abutting connection, etc. Similarly, the second conductive region 413 is connected to the sampling line 31, and the connection structure between the second conductive region 413 and the sampling line 31 can also be various. For example, welding connection, clamping connection, or abutting connection, etc. It should be noted that the conductors in the second conductive region 413 and the sampling line 31 are connected to each other to realize the electrical connection between the sampling assembly 30 and the second conductive region 413.

[0136] Optionally, both ends of the fuse 412 are respectively connected to the first conductive region 411 and the second conductive region 413, and the fuse 412 is configured to be able to be melted when a short circuit occurs in the battery module 20 or the sampling assembly 30 to disconnect the electrical connection between the sampling line 31 and the bus bar component 22. The structure of the fuse 412 can be various. The fuse 412, the first conductive region 411, and the second conductive region 413 can be an integrally formed structure. For example, the conductive layer 41 of the insurance device 40 is a composite foil structure or a single-layer foil structure formed by different materials, and the conductive layer 41 is formed into a structure in which the first conductive region 411, the fuse 412, and the second conductive region 413 are connected in sequence through an integral forming process, such as stamping or cutting and other integral forming processes. Of course, the fuse 412, the first conductive region 411, and the second conductive region 413 can also be a separately arranged structure. The fuse 412 serves to connect the first conductive region 411 and the second conductive region 413. In this embodiment, the fuse 412 can be made of a metal or alloy with a low melting point. For example, lead, tin, aluminum-magnesium alloy, gold wire, or lead-antimony alloy, etc. Similarly, the connection structure between the fuse 412 and the first conductive region 411 and the second conductive region 413 can also be various. For example, welding connection or clamping connection, etc.

[0137] At least a part of the first insulating layer 42 is located between the second conductive region 413 and the bus bar component 22 to insulate and isolate the second conductive region 413 and the bus bar component 22. That is to say, the first insulating layer 42 and the conductive layer 41 are structures stacked along the first direction X, and the first insulating layer 42 is located between the bus bar component 22 and the conductive layer 41 in the first direction X, so that at least a part of the first insulating layer 42 is located between the second conductive region 413 of the conductive layer 41 and the bus bar component 22, so that the first insulating layer 42 can separate the second conductive region 413 and the bus bar component 22.

[0138] Exemplarily, the material of the first insulating layer 42 can be various. For example, the material of the first insulating layer 42 can be rubber, silica gel, plastic, or the like.

[0139] In this embodiment, a fuse device 40 is provided on the busbar component 22 of the battery module 20, and the sampling line 31 of the sampling assembly 30 is electrically connected to the busbar component 22 through the fuse device 40, so that the sampling assembly 30 can obtain and sample the voltage of the battery module 20, facilitating the acquisition of the usage condition of the battery 100. Among them, the fuse device 40 is provided with a conductive layer 41 and a first insulating layer 42. The conductive layer 41 includes a first conductive region 411, a fuse 412, and a second conductive region 413 that are connected in sequence. The first conductive region 411 and the second conductive region 413 are respectively connected to the busbar component 22 and the sampling line 31 to enable the sampling line 31 of the sampling assembly 30 to be electrically connected to the busbar component 22 through the conductive layer 41. With this structure of the battery 100, on the one hand, when a short circuit occurs in the battery module 20 or the sampling assembly 30, the fuse 412 of the conductive layer 41 can be blown to disconnect the electrical connection between the first conductive region 411 and the second conductive region 413, thereby enabling the battery module 20 and the sampling assembly 30 to be open-circuited, alleviating the phenomenon that the battery module 20 or the sampling assembly 30 is further damaged. On the other hand, by providing the first insulating layer 42 between the conductive layer 41 and the busbar component 22, the first insulating layer 42 can separate the second conductive region 413 and the busbar component 22, which is conducive to increasing the creepage distance between the second conductive region 413 and the busbar component 22, reducing the risks such as the fuse device 40 failing or short-circuiting after the second conductive region 413 and the busbar component 22 are mis-lapped, and thus effectively improving the usage stability and service life of the battery 100.

[0140] According to some embodiments of the present application, referring to Figure 4 、 Figure 5 and Figure 6 As shown, along the first direction X, the projection of the fuse device 40 is located within the busbar component 22. That is to say, the busbar component 22 covers the fuse device 40 in the first direction X.

[0141] In this embodiment, by setting the projection of the fuse device 40 in the first direction X to be entirely located within the busbar component 22, on the one hand, it can improve the assembly stability of the fuse device 40 provided on the busbar component 22, reducing the risk of the fuse device 40 falling off and alleviating the collision phenomenon between the fuse device 40 and other components. On the other hand, it can reduce the overlapping phenomenon between the conductive layer 41 of the fuse device 40 and other components, reducing the risk of internal short circuit occurring during the use of the battery 100, which is beneficial to improving the usage reliability of the battery 100.

[0142] According to some embodiments of the present application, referring toFigure 6 , Figure 7 and Figure 8 As shown in Figure 6 , Figure 7 and Figure 8 , the fuse device 40 may further include a second insulating layer 43, which is stacked and connected with the first insulating layer 42 along the first direction X. Along the first direction X, the conductive layer 41 is disposed between the first insulating layer 42 and the second insulating layer 43.

[0143] Wherein, the second insulating layer 43 is stacked and connected with the first insulating layer 42 along the first direction X, that is to say, the first insulating layer 42 and the second insulating layer 43 are structures arranged and connected with each other along the first direction X. Optionally, the connection structure between the first insulating layer 42 and the second insulating layer 43 may be thermal composite connection or bonding, etc. It should be noted that the thickness directions of both the first insulating layer 42 and the second insulating layer 43 are the first direction X.

[0144] Exemplarily, the material of the second insulating layer 43 may be various. For example, the material of the second insulating layer 43 may be rubber, plastic or silica gel, etc.

[0145] The conductive layer 41 is disposed between the first insulating layer 42 and the second insulating layer 43, that is to say, the first insulating layer 42 is located between the conductive layer 41 and the busbar component 22 in the first direction X, while the second insulating layer 43 is located on the side of the conductive layer 41 away from the busbar component 22, so that the first insulating layer 42 and the second insulating layer 43 are structures that sandwich the conductive layer 41 with each other.

[0146] In this embodiment, the fuse device 40 is further provided with a second insulating layer 43, and the second insulating layer 43 and the first insulating layer 42 are structures stacked and connected with each other along the first direction X, so that the first insulating layer 42 and the second insulating layer 43 can play a role in clamping and assembling the conductive layer 41. On the one hand, the battery 100 adopting this structure can form insulating structures on both sides of the conductive layer 41 in the first direction X, which is beneficial to further increasing the creepage distance between the conductive layer 41 and other components, and is beneficial to further reducing the overlapping phenomenon between the conductive layer 41 and other components, thereby further reducing the risk of internal short circuit during the use of the battery 100 and improving the use reliability of the battery 100. On the other hand, the first insulating layer 42 and the second insulating layer 43 can play a certain stabilizing role on the conductive layer 41, which is beneficial to further improving the assembly stability of the fuse device 40 disposed on the busbar component 22.

[0147] According to some embodiments of the present application, referring to Figure 7 and Figure 8 , and further referring to Figure 9 , Figure 9Schematic diagram of the conductive layer 41 of the insurance device 40 provided by some embodiments of the present application. A gap 414 is formed between the first conductive region 411 and the second conductive region 413. Along the first direction X, the regions of the first insulating layer 42 and the second insulating layer 43 corresponding to the gap 414 are connected to each other to separate the first conductive region 411 and the second conductive region 413.

[0148] Among them, the gap 414 formed between the first conductive region 411 and the second conductive region 413 is an interval region between the first conductive region 411 and the second conductive region 413.

[0149] Along the first direction X, the regions of the first insulating layer 42 and the second insulating layer 43 corresponding to the gap 414 are connected to each other to separate the first conductive region 411 and the second conductive region 413. That is to say, the region where the projection of the first insulating layer 42 in the first direction X is located within the gap 414 is connected to the part where the projection of the second insulating layer 43 in the first direction X is located within the gap 414, so as to form a first connection part located in the space of the gap 414, and the first connection part can separate the first conductive region 411 and the second conductive region 413.

[0150] In this embodiment, by connecting the parts of the first insulating layer 42 and the second insulating layer 43 corresponding to the gap 414 between the first conductive region 411 and the second conductive region 413 in the first direction X, the first insulating layer 42 and the second insulating layer 43 can also play an insulating and isolating role for the first conductive layer 41 and the second conductive layer 41, so as to realize the physical separation between the first conductive region 411 and the second conductive region 413, and can increase the creepage distance between the first conductive region 411 and the second conductive region 413, and further can alleviate the phenomenon of mis-lapping between the first conductive region 411 and the second conductive region 413, which is beneficial to reducing the risk of failure of the insurance device 40.

[0151] According to some embodiments of the present application, as shown in Figure 7 and Figure 8 The edge regions of the first insulating layer 42 and the edge regions of the second insulating layer 43 are connected to each other, and the first insulating layer 42 and the second insulating layer 43 jointly define an accommodation space, and the conductive layer 41 is accommodated in the accommodation space.

[0152] Among them, the edge regions of the first insulating layer 42 and the edge regions of the second insulating layer 43 are connected to each other. That is to say, the regions of the first insulating layer 42 close to the outer edge and the regions of the second insulating layer 43 close to the outer edge are connected to each other to form a second connection part with an annular structure.

[0153] The first insulating layer 42 and the second insulating layer 43 jointly define an accommodation space, and the conductive layer 41 is accommodated in the accommodation space. That is, the second connecting portion formed by the connection of the first insulating layer 42 and the second insulating layer 43 is a structure surrounding the outer side of the conductive layer 41. That is to say, the projection of the conductive layer 41 in the first direction X is located within the outer edge of the first insulating layer 42, and the projection of the conductive layer 41 in the first direction X is located within the outer edge of the second insulating layer 43, so that the edge regions of the first insulating layer 42 and the second insulating layer 43 are connected to each other to form a housing member for housing the conductive layer 41.

[0154] In this embodiment, by connecting the edge regions of the first insulating layer 42 and the second insulating layer 43, the first insulating layer 42 and the second insulating layer 43 can jointly form an accommodation space for accommodating the conductive layer 41. On the one hand, this structure of the battery 100 can further reduce the overlapping phenomenon between the conductive layer 41 and other components, thereby further reducing the risk of internal short circuit during the use of the battery 100, so as to improve the use reliability of the battery 100. On the other hand, it further improves the stabilizing effect of the first insulating layer 42 and the second insulating layer 43 on the conductive layer 41, which is beneficial to improving the structural stability of the fuse device 40, and can further improve the assembly stability of the fuse device 40 provided on the busbar component 22.

[0155] According to some embodiments of the present application, referring to Figure 8 and Figure 9 and further referring to Figure 10 Figure 10 FIG. 14 is a front view of the fuse device 40 provided in some embodiments of the present application facing the first insulating layer 42 in the first direction X. The first insulating layer 42 is provided with a first window 421, and the first window 421 is configured to expose a part of the first conductive region 411, and the exposed part of the first conductive region 411 is connected to the busbar component 22.

[0156] Wherein, the first window 421 is a through-hole structure provided on the first insulating layer 42, and the first window 421 penetrates through the two side surfaces of the first insulating layer 42 along the first direction X.

[0157] The first window 421 is configured to expose a part of the first conductive region 411, and the exposed part of the first conductive region 411 is connected to the busbar component 22. That is to say, a part of the projection of the first conductive region 411 in the first direction X is located within the first window 421, and the region of the first conductive region 411 corresponding to the first window 421 in the first direction X is connected to the busbar component 22.

[0158] ​In this embodiment, a first window 421 is provided on the first insulating layer 42, and the first window 421 can expose a part of the first conductive region 411 of the conductive layer 41 in the first direction X, so as to facilitate the connection between the bus bar component 22 and the exposed region of the first conductive region 411, which is beneficial to reducing the connection difficulty between the bus bar component 22 and the first conductive region 411, and can improve the connection quality between the bus bar component 22 and the first conductive region 411.

[0159] In some embodiments, referring to Figure 10 as shown, along the first direction X, the projection of the first window 421 is located within the first conductive region 411. That is to say, the projection of the first window 421 in the first direction X is located within the edge of the first conductive region 411. Conversely, the first conductive region 411 covers the first window 421 in the first direction X.

[0160] In this embodiment, by setting the projection of the first window 421 in the first direction X to be entirely located within the first conductive region 411, on the one hand, it can alleviate the phenomenon that the exposed region of the first conductive region 411 is too large, so as to reduce the overlap risk between the first conductive region 411 and other components. On the other hand, it can alleviate the phenomenon that the edge of the first conductive region 411 is exposed, which is beneficial to improving the stability of the first conductive region 411 assembled between the first insulating layer 42 and the second insulating layer 43, thereby reducing the risk of the first conductive region 411 falling off from the first window 421.

[0161] According to some embodiments of the present application, referring to Figure 8 、 Figure 9 and Figure 10 , and further referring to Figure 11 , Figure 11 is a front view of the insurance device 40 provided by some embodiments of the present application facing the second insulating layer 43 in the first direction X. The first conductive region 411 is welded to the bus bar component 22. The second insulating layer 43 is provided with a second window 431, and the second window 431 is configured to expose a part of the first conductive region 411. At least a part of the projections of the second window 431 and the first window 421 in the first direction X overlap.

[0162] Among them, the second window 431 is a through-hole structure provided on the second insulating layer 43, and the second window 431 penetrates through the two side surfaces of the second insulating layer 43 along the first direction X.

[0163] The second window 431 is configured to expose a part of the first conductive region 411. That is to say, a part of the projection of the first conductive region 411 in the first direction X is located within the second window 431.

[0164] At least a part of the projection of the second window 431 and the first window 421 in the first direction X overlaps, that is to say, the part of the projection of the first conductive region 411 in the first direction X is located both within the first window 421 and within the second window 431, such that the part of the projection of the first conductive region 411 in the first direction X that is located both within the first window 421 and within the second window 431 is welded and connected to the bus bar component 22.

[0165] In this embodiment, by providing the second window 431 on the second insulating layer 43 that can expose a part of the first conductive region 411, and at least a part of the projection of the second window 431 in the first direction X is located within the first window 421, the first conductive region 411 and the bus bar component 22 can be welded and connected from the side of the first conductive region 411 facing away from the bus bar component 22 and corresponding to the position of the second window 431. On the one hand, the difficulty of welding and assembling the first conductive region 411 and the bus bar component 22 can be reduced to improve the assembly efficiency of the battery 100. On the other hand, it can be realized that when welding and connecting the first conductive region 411 and the bus bar component 22, it is not necessary to penetrate the second insulating layer 43, which is beneficial to reducing the welding power required for welding and connecting the first conductive region 411 and the bus bar component 22, and can effectively improve the welding quality between the first conductive region 411 and the bus bar component 22.

[0166] In some embodiments, referring to Figure 8 As shown, the projections of the second window 431 and the first window 421 in the first direction X coincide with each other. That is to say, the shapes and sizes of the first window 421 and the second window 431 are the same, and their positions in the first direction X are also the same, that is, the part of the projection of the first conductive region 411 in the first direction X that is located within the first window 421 is also located within the second window 431.

[0167] In this embodiment, by setting the second window 431 and the first window 421 to have a structure where their projections in the first direction X coincide, when welding and connecting the first conductive region 411 and the bus bar component 22, it is not necessary to locate the overlapping region of the second window 431 and the first window 421 in the first direction X, which is beneficial to further reducing the difficulty of welding and assembling the first conductive region 411 and the bus bar component 22 to improve the assembly efficiency of the battery 100.

[0168] In some embodiments, referring to Figure 11 As shown, along the first direction X, the projection of the second window 431 is located within the first conductive region 411. That is to say, the projection of the second window 431 in the first direction X is located within the edge of the first conductive region 411. Conversely, the first conductive region 411 covers the second window 431 in the first direction X.

[0169] In this embodiment, by setting the projection of the second window 431 in the first direction X to be entirely located within the first conductive region 411, on the one hand, it can alleviate the phenomenon that the exposed area of the first conductive region 411 is too large, so as to reduce the risk of overlap between the first conductive region 411 and other components. On the other hand, it can alleviate the phenomenon that the edge of the first conductive region 411 is exposed, which is beneficial to improving the stability of the first conductive region 411 assembled between the first insulating layer 42 and the second insulating layer 43, thereby reducing the risk of the first conductive region 411 falling off from the second window 431.

[0170] According to some embodiments of the present application, referring to Figure 7 、 Figure 8 and Figure 11 As shown, the second insulating layer 43 is provided with a third window 432, and the third window 432 is configured to expose a part of the second conductive region 413, and the exposed part of the second conductive region 413 is connected to the sampling line 31.

[0171] Among them, the third window 432 is a through-hole structure provided on the second insulating layer 43, and the third window 432 penetrates the two side surfaces of the second insulating layer 43 along the first direction X.

[0172] The third window 432 is configured to expose a part of the second conductive region 413, and the exposed part of the second conductive region 413 is connected to the sampling line 31. That is to say, a part of the projection of the second conductive region 413 in the first direction X is located within the third window 432, and the region of the second conductive region 413 corresponding to the third window 432 in the first direction X is connected to the conductor of the sampling line 31.

[0173] In this embodiment, the second insulating layer 43 is provided with a third window 432, and the third window 432 can expose a part of the second conductive region 413 of the conductive layer 41 in the first direction X, thereby facilitating the connection between the sampling line 31 and the exposed region of the second conductive region 413, which is beneficial to reducing the connection difficulty between the sampling line 31 and the second conductive region 413, and can improve the connection quality between the sampling line 31 and the second conductive region 413.

[0174] In some embodiments, referring to Figure 11 As shown, along the first direction X, the projection of the third window 432 is located within the second conductive region 413. That is to say, the projection of the third window 432 in the first direction X is located within the edge of the second conductive region 413. Conversely, the second conductive region 413 covers the third window 432 in the first direction X.

[0175] In this embodiment, by setting the projection of the third window 432 in the first direction X to be entirely located within the second conductive region 413, on the one hand, it can alleviate the phenomenon that the exposed area of the second conductive region 413 is too large, so as to reduce the risk of overlap between the second conductive region 413 and other components. On the other hand, it can alleviate the phenomenon that the edge of the second conductive region 413 is exposed, which is beneficial to improving the stability of the second conductive region 413 assembled between the first insulating layer 42 and the second insulating layer 43, thereby reducing the risk of the second conductive region 413 falling off from the third window 432.

[0176] According to some embodiments of the present application, the first insulating layer 42 and the second insulating layer 43 are thermally compounded and connected. That is to say, the first insulating layer 42 and the second insulating layer 43 are connected to each other by a hot pressing process.

[0177] Of course, in other embodiments, the first insulating layer 42 and the second insulating layer 43 can also be adhesively bonded to each other by double-sided tape or glue, etc.

[0178] In this embodiment, the first insulating layer 42 and the second insulating layer 43 are connected by a thermally compounded structure. On the one hand, it can improve the connection reliability of the first insulating layer 42 and the second insulating layer 43, so as to improve the structural stability and reliability of the conductive layer 41 disposed between the first insulating layer 42 and the second insulating layer 43. On the other hand, it can reduce the assembly difficulty of the first insulating layer 42 and the second insulating layer 43, so as to improve the assembly efficiency of the fuse device 40.

[0179] According to some embodiments of the present application, referring to Figure 5 、 Figure 7 and Figure 8 as shown, the first conductive region 411 is welded to the busbar component 22, and the second conductive region 413 is welded to the sampling line 31.

[0180] Exemplarily, the first conductive region 411 and the busbar component 22 are connected by laser welding, and the conductor of the second conductive region 413 and the sampling line 31 are connected by soldering.

[0181] In this embodiment, by setting the first conductive region 411 and the bus bar member 22 to be connected by welding, it is beneficial to improve the connection reliability between the first conductive region 411 and the bus bar member 22, so as to reduce the risk of the fuse device 40 failing due to the separation of the first conductive region 411 and the bus bar member 22, and it is also beneficial to improve the over-current capacity between the first conductive region 411 and the bus bar member 22. Similarly, by setting the second conductive region 413 and the sampling line 31 to be connected by welding, it is beneficial to improve the connection reliability between the second conductive region 413 and the sampling line 31, so as to reduce the risk of the fuse device 40 failing due to the separation of the second conductive region 413 and the sampling line 31, and it is also beneficial to improve the over-current capacity between the second conductive region 413 and the sampling line 31.

[0182] According to some embodiments of the present application, referring to Figure 9 , and further referring to Figure 12 , Figure 12 FIG. is a cross-sectional view of the conductive layer 41 of the fuse device 40 provided in some embodiments of the present application perpendicular to the second direction Y. The conductive layer 41 includes a first foil 415 and a second foil 416 that are connected in a composite manner along the first direction X. The first foil 415 is located on the side of the second foil 416 facing the bus bar member 22 in the first direction X. The part of the first foil 415 located in the first conductive region 411 is welded to the bus bar member 22, and the part of the second foil 416 located in the second conductive region 413 is welded to the sampling line 31. The material of the bus bar member 22 is different from the material of the sampling line 31. The material of the first foil 415 is the same as the material of the bus bar member 22, and the material of the second foil 416 is the same as the material of the sampling line 31.

[0183] Among them, the conductive layer 41 includes a first foil 415 and a second foil 416 that are connected in a composite manner along the first direction X. That is to say, the conductive layer 41 is a composite foil structure formed by the first foil 415 and the second foil 416 through a composite process. Optionally, the first foil 415 and the second foil 416 can form the conductive layer 41 through a composite process such as hot rolling or cold rolling.

[0184] It should be noted that in this embodiment, the first conductive region 411, the fuse 412, and the second conductive region 413 are structures formed by an integral molding process of the conductive layer 41 with a composite foil structure. For example, the conductive layer 41 formed by the composite foil forms the first conductive region 411, the fuse 412, and the second conductive region 413 that are connected in sequence through an integral molding process such as stamping or cutting, so that the first conductive region 411, the fuse 412, and the second conductive region 413 all include the first foil 415 and the second foil 416 that are connected in a composite manner along the first direction X.

[0185] The first foil 415 is located on the side of the second foil 416 facing the bus bar member 22 in the first direction X. That is to say, the first foil 415 and the second foil 416 of the conductive layer 41 are arranged in a stacked structure along the first direction X, and the first foil 415 is located on the side of the second foil 416 facing the bus bar member 22.

[0186] The part of the first foil 415 located in the first conductive region 411 is welded to the bus bar member 22. That is to say, the first foil 415 in the first conductive region 411 is welded to the bus bar member 22. Similarly, the part of the second foil 416 located in the second conductive region 413 is welded to the sampling line 31. That is to say, the second foil 416 in the second conductive region 413 is welded to the conductor of the sampling line 31.

[0187] It should be noted that the material of the first foil 415 being the same as that of the bus bar member 22 means that the main components of the first foil 415 and the bus bar member 22 are the same. For example, if both the first foil 415 and the bus bar member 22 are of a single material, such as copper or aluminum, then the first foil 415 and the bus bar member 22 are both composed of the same metal element; if the first foil 415 and the bus bar member 22 are of an alloy material or a mixed material, such as aluminum alloy or steel, etc., then the material of the first foil 415 being the same as that of the bus bar member 22 means that the main components of the first foil 415 and the bus bar member 22 are the same. If the first foil 415 and the bus bar member 22 only differ in the content of the components, they are still of the same material. Similarly, the material of the second foil 416 being the same as that of the sampling line 31 means that the main components of the second foil 416 and the conductor of the sampling line 31 are the same. For example, if both the second foil 416 and the conductor of the sampling line 31 are of a single material, such as copper or aluminum, then the second foil 416 and the conductor of the sampling line 31 are both composed of the same metal element; if the second foil 416 and the conductor of the sampling line 31 are of an alloy material or a mixed material, such as aluminum alloy or steel, etc., then the material of the second foil 416 being the same as that of the conductor of the sampling line 31 means that the main components of the second foil 416 and the conductor of the sampling line 31 are the same. If the second foil 416 and the conductor of the sampling line 31 only differ in the content of the components, they are still of the same material. On the contrary, the material of the bus bar member 22 being different from that of the sampling line 31 means that the main components of the bus bar member 22 and the conductor of the sampling line 31 are different. For example, if both the bus bar member 22 and the conductor of the sampling line 31 are of a single material, such as copper or aluminum, then the bus bar member 22 and the conductor of the sampling line 31 are both composed of different metal elements; if the bus bar member 22 and the conductor of the sampling line 31 are of an alloy material or a mixed material, such as aluminum alloy or steel, etc., then the material of the bus bar member 22 being different from that of the sampling line 31 means that the main components of the bus bar member 22 and the conductor of the sampling line 31 are different.

[0188] Exemplarily, both the material of the busbar component 22 and the first foil 415 is aluminum. Of course, in other embodiments, the materials of the busbar component 22 and the first foil 415 can also be both copper or alloy, etc.

[0189] Exemplarily, both the conductor of the sampling line 31 and the second foil 416 are made of copper. Of course, in other embodiments, the materials of the conductor of the sampling line 31 and the second foil 416 can also be both aluminum or alloy, etc.

[0190] In this embodiment, the conductive layer 41 is provided with a first foil 415 and a second foil 416 that are connected in a composite manner along the first direction X. And the first foil 415 is located on the side of the second foil 416 facing the busbar component 22 in the first direction X. By setting the material of the first foil 415 to be the same as that of the busbar component 22, and welding the part of the first foil 415 located in the first conductive region 411 to the busbar component 22. Similarly, by setting the material of the second foil 416 to be the same as that of the sampling line 31, and welding the part of the second foil 416 located in the second conductive region 413 to the sampling line 31, so as to realize the structure in which the first conductive region 411 and the busbar component 22 are welded with the same material, and the structure in which the second conductive region 413 and the sampling line 31 are welded with the same material. On the one hand, it can reduce the welding difficulty between the first conductive region 411 and the busbar component 22 and between the second conductive region 413 and the sampling line 31. On the other hand, it can alleviate the quality problems caused by welding different materials to each other, which is beneficial to improving the welding quality between the first conductive region 411 and the busbar component 22 and between the second conductive region 413 and the sampling line 31.

[0191] Of course, in other embodiments, the fuse device 40 can also be other structures. For example, the materials of the conductive layer 41, the busbar component 22, and the sampling line 31 are all the same. That is to say, the first conductive region 411, the fuse 412, and the second conductive region 413 of the conductive layer 41, as well as the conductors of the busbar component 22 and the sampling line 31, are all structures formed of the same material.

[0192] Exemplarily, the conductors of the conductive layer 41, the busbar component 22, and the sampling line 31 can all be copper or aluminum, etc.

[0193] It should be noted that in this embodiment, the first conductive region 411, the fuse 412, and the second conductive region 413 of the conductive layer 41 can be a structure integrally formed by a single foil, or a separately arranged structure. The connection structures between the fuse 412 and the first conductive region 411 and the second conductive region 413 can be various, such as welding connection or clamping connection, etc.

[0194] In this embodiment, by setting the conductive layer 41, the busbar component 22, and the sampling line 31 of the fuse device 40 to have the same material structure, a structure in which the first conductive region 411 and the busbar component 22, and the second conductive region 413 and the sampling line 31 are welded together with the same material is realized. On the one hand, it can reduce the welding difficulty between the first conductive region 411 and the busbar component 22, and between the second conductive region 413 and the sampling line 31. On the other hand, it can alleviate the quality problems caused by welding different materials together, which is beneficial to improving the welding quality between the first conductive region 411 and the busbar component 22, and between the second conductive region 413 and the sampling line 31.

[0195] It should be noted that the structure of the fuse device 40 is not limited to this. In some embodiments, the fuse device 40 can also be other structures. For example, the material of the busbar component 22 is different from that of the sampling line 31, the material of the first conductive region 411 is the same as that of the busbar component 22, and the material of the second conductive region 413 is the same as that of the sampling line 31.

[0196] Among them, the first conductive region 411, the fuse 412, and the second conductive region 413 of the conductive layer 41 are separately arranged structures. The fuse 412 connects the first conductive region 411 and the second conductive region 413. The first conductive region 411 has the same material structure as the busbar component 22, and the second conductive region 413 has the same material structure as the conductor of the sampling line 31. In this embodiment, the fuse 412 can have the same material as the first conductive region 411, or the same material as the second conductive region 413, or a structure with a material different from both the first conductive region 411 and the second conductive region 413.

[0197] In this embodiment, by setting the material of the first conductive region 411 of the conductive layer 41 to be the same as that of the busbar component 22, and setting the material of the second conductive region 413 of the conductive layer 41 to be the same as that of the sampling line 31, a structure in which the first conductive region 411 and the busbar component 22 are welded together with the same material is realized, and a structure in which the second conductive region 413 and the sampling line 31 are welded together with the same material can be realized. On the one hand, it can reduce the welding difficulty between the first conductive region 411 and the busbar component 22, and between the second conductive region 413 and the sampling line 31. On the other hand, it can alleviate the quality problems caused by welding different materials together, which is beneficial to improving the welding quality between the first conductive region 411 and the busbar component 22, and between the second conductive region 413 and the sampling line 31.

[0198] According to some embodiments of the present application, see Figure 8 and Figure 9As shown, the first conductive region 411 includes a first portion 4111, a second portion 4112, and a third portion 4113 that are connected in sequence. The first portion 4111 and the third portion 4113 are disposed opposite to each other along the second direction Y, and the second direction Y is perpendicular to the first direction X.

[0199] Wherein, the first conductive region 411 includes a first portion 4111, a second portion 4112, and a third portion 4113 that are connected in sequence. That is to say, one end of the second portion 4112 is connected to one end of the first portion 4111, and the other end of the second portion 4112 is connected to one end of the third portion 4113.

[0200] Exemplarily, the second portion 4112 extends along the second direction Y. The two ends of the second portion 4112 in the second direction Y are respectively connected to the first portion 4111 and the third portion 4113, and both the first portion 4111 and the third portion 4113 extend along the third direction Z.

[0201] Exemplarily, in Figure 9 the first portion 4111, the second portion 4112, and the third portion 4113 of the first conductive region 411 are of an integrally formed structure. Of course, in other embodiments, the first portion 4111, the second portion 4112, and the third portion 4113 may also be of a separately arranged structure.

[0202] It should be noted that in the embodiment where the first insulating layer 42 is provided with a first window 421 and the second insulating layer 43 is provided with a second window 431, the first window 421 is also a "C"-shaped structure having the same shape as the first conductive region 411. Similarly, the second window 431 is also a "C"-shaped structure having the same shape as the first conductive region 411, so as to increase the welding area between the first conductive region 411 and the bus bar component 22.

[0203] In this embodiment, by setting the first conductive region 411 as a first portion 4111, a second portion 4112, and a third portion 4113 that are connected in sequence, and the first portion 4111 and the third portion 4113 are disposed opposite to each other along the second direction Y to form a first conductive region 411 in a shape similar to a "C" shape, the fuse device 40 having this structure can increase the effective welding area between the first conductive region 411 of the conductive layer 41 and the bus bar component 22, and can further improve the assembly stability of the fuse device 40 disposed on the bus bar component 22.

[0204] In some embodiments, as shown in Figure 9 along the second direction Y, the second conductive region 413 is located between the first portion 4111 and the third portion 4113, and the two ends of the fuse 412 are respectively connected to the second conductive region 413 and the third portion 4113.

[0205] Among them, the second conductive region 413 is located between the first part 4111 and the third part 4113 in the second direction Y, and the second conductive region 413 is spaced from the first part 4111, the second part 4112, and the third part 4113.

[0206] In this embodiment, by arranging the second conductive region 413 of the conductive layer 41 to be located between the first part 4111 and the third part 4113 in the second direction Y, so that the second conductive region 413 is a structure located inside the first conductive region 411. On the one hand, the fuse device 40 adopting this structure can optimize the space occupied by the conductive layer 41 and improve the overall structural strength of the fuse device 40. On the other hand, it can reduce the difficulty of connecting the fuse 412 to the first conductive region 411 and the second conductive region 413, so as to reduce the manufacturing difficulty of the conductive layer 41.

[0207] According to some embodiments of the present application, referring to Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, along the first direction X, the busbar component 22 is connected to one side of the battery cell 21, and the fuse device 40 is arranged on the side of the busbar component 22 facing away from the battery cell 21.

[0208] Among them, the busbar component 22 is located on one side of the plurality of battery cells 21 in the first direction X. Correspondingly, the sampling assembly 30 is located on the side of the battery module 20 where the busbar component 22 is arranged.

[0209] The fuse device 40 is arranged on the side of the busbar component 22 facing away from the battery cell 21, that is to say, the busbar component 22 is arranged between the fuse device 40 and the battery cell 21 in the first direction X. Of course, in other embodiments, the fuse device 40 can also be arranged on the side of the busbar component 22 facing the battery cell 21.

[0210] In this embodiment, by connecting the busbar component 22 to one side of the battery cell 21 in the first direction X and arranging the fuse device 40 on the side of the busbar component 22 facing away from the battery cell 21 in the first direction X, it is beneficial to reduce the assembly difficulty between the fuse device 40 and the busbar component 22, and can reduce the connection difficulty between the sampling wire 31 and the fuse device 40, thereby improving the assembly efficiency of the battery 100.

[0211] In some embodiments, the battery 100 may further include an insulating member 50. Along the first direction X, the insulating member 50 is arranged between the sampling assembly 30 and the plurality of battery cells 21 of the battery module 20 to insulate and isolate the sampling assembly 30 and the battery cells 21, thereby being beneficial to reducing the short - circuit risk between the sampling assembly 30 and the battery module 20.

[0212] Exemplarily, the thickness direction of the insulating member 50 is the first direction X. Similarly, the insulating member 50 can be made of various materials. For example, the insulating member 50 can be made of rubber, silica gel, plastic, or the like.

[0213] According to some embodiments of the present application, the present application further provides an electrical device. The electrical device includes the battery 100 of any of the above solutions, and the battery 100 is used to provide electrical energy for the electrical device.

[0214] Among them, the electrical device can be any of the foregoing devices or systems that apply the battery 100.

[0215] According to some embodiments of the present application, refer to Figures 2 to 12As shown, the present application provides a battery 100, which includes a battery module 20, a safety device 40 and a sampling assembly 30. The battery module 20 includes a busbar 22 and a plurality of battery cells 21, the busbar 22 is located on one side of the plurality of battery cells 21 in a first direction X, and the busbar 22 connects the plurality of battery cells 21 to electrically connect the plurality of battery cells 21, and the plurality of battery cells 21 are stacked along a second direction Y. The safety device 40 is disposed on a side of the busbar 22 away from the battery cells 21 in the first direction X, the sampling assembly 30 is located on a side of the battery module 20 provided with the busbar 22 in the first direction X, the sampling assembly 30 has a sampling line 31, and the sampling line 31 is electrically connected to the busbar 22 through the safety device 40. The projection of the safety device 40 in the first direction X is located in the busbar component 22. The safety device 40 includes a conductive layer 41, a first insulating layer 42 and a second insulating layer 43. The first insulating layer 42 and the second insulating layer 43 are stacked and connected along the first direction X. The first insulating layer 42 and the second insulating layer 43 are thermally compositely connected. Along the first direction X, the conductive layer 41 is arranged between the first insulating layer 42 and the second insulating layer 43. At least part of the first insulating layer 42 is located between the second conductive area 413 and the busbar component 22 to insulate and isolate the second conductive area 413 from the busbar component 22. The conductive layer 41 includes a first conductive area 411, a fuse 412 and a second conductive area 413. The first conductive area 411 and the second conductive area 413 are arranged at intervals. The first conductive area 411 is connected to the busbar component 22, and the second conductive area 413 is connected to the sampling line 31. The fuse 412 connects the first conductive area 411 and the second conductive area 413. A gap 414 is formed between the first conductive area 411 and the second conductive area 413. Along the first direction X, the first insulating layer 42 and the second insulating layer 43 are connected to each other in the area corresponding to the gap 414 to separate the first conductive area 411 and the second conductive area 413, and the edge area of ​​the first insulating layer 42 and the edge area of ​​the second insulating layer 43 are connected to each other. The first insulating layer 42 and the second insulating layer 43 jointly define a receiving space, and the conductive layer 41 is received in the receiving space. The first insulating layer 42 is provided with a first window 421, and the first window 421 is configured to expose a portion of the first conductive area 411. The exposed portion of the first conductive area 411 is connected to the busbar component 22. The first conductive area 411 is welded to the busbar component 22. The second insulating layer 43 is provided with a second window 431, and the second window 431 is configured to expose a portion of the first conductive area 411. The projections of the second window 431 and the first window 421 in the first direction X overlap with each other. Along the first direction X, the projections of the first window 421 and the second window 431 are both located in the first conductive area 411. The second insulating layer 43 is provided with a third window 432 . The third window 432 is configured to expose a portion of the second conductive region 413 . The exposed portion of the second conductive region 413 is connected to the conductor of the sampling line 31 .Along the first direction X, the projection of the third window 432 is located within the second conductive region 413. The first conductive region 411 includes a first portion 4111, a second portion 4112, and a third portion 4113 that are sequentially connected. The first portion 4111 and the third portion 4113 are disposed opposite to each other along the second direction Y, which is perpendicular to the first direction X. Along the second direction Y, the second conductive region 413 is located between the first portion 4111 and the third portion 4113. Both ends of the fuse 412 are respectively connected to the second conductive region 413 and the third portion 4113. The first conductive region 411 is welded to the bus bar component 22, and the second conductive region 413 is welded to the sampling line 31. The conductive layer 41 includes a first foil 415 and a second foil 416 that are compound-connected along the first direction X. The first foil 415 is located on the side facing the bus bar component 22 of the second foil 416 in the first direction X. The portion of the first foil 415 located in the first conductive region 411 is welded to the bus bar component 22, and the portion of the second foil 416 located in the second conductive region 413 is welded to the conductor of the sampling line 31. The material of the bus bar component 22 is different from the material of the sampling line 31. The material of the first foil 415 is the same as the material of the bus bar component 22, and the material of the second foil 416 is the same as the material of the conductor of the sampling line 31.

[0216] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0217] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery, characterized in that: include: A battery module, comprising a busbar component and a plurality of battery cells, wherein the busbar component electrically connects the plurality of battery cells; A safety device, stacked with the current collecting component along a first direction; as well as A sampling assembly having a sampling line, wherein the sampling line is electrically connected to the confluence component through the safety device; Wherein, the fuse device includes a conductive layer and a first insulating layer, the conductive layer includes a first conductive area, a fuse and a second conductive area, the first conductive area and the second conductive area are spaced apart, the first conductive area is connected to the bus component, the second conductive area is connected to the sampling line, the fuse connects the first conductive area and the second conductive area, and along the first direction, at least part of the first insulating layer is located between the second conductive area and the bus component to insulate and isolate the second conductive area from the bus component.

2. The battery according to claim 1, characterized in that Along the first direction, a projection of the safety device is located inside the current collecting component.

3. The battery according to claim 1, characterized in that The safety device also includes: A second insulating layer, stacked and connected to the first insulating layer along the first direction; Wherein, along the first direction, the conductive layer is arranged between the first insulating layer and the second insulating layer.

4. The battery according to claim 3, characterized in that A gap is formed between the first conductive region and the second conductive region; Wherein, along the first direction, the first insulating layer and the second insulating layer are connected to each other in regions corresponding to the gap to separate the first conductive region and the second conductive region.

5. The battery according to claim 3, characterized in that The edge region of the first insulating layer and the edge region of the second insulating layer are connected to each other, the first insulating layer and the second insulating layer jointly define a receiving space, and the conductive layer is received in the receiving space.

6. The battery according to claim 5, characterized in that The first insulating layer is provided with a first window, and the first window is configured to expose a portion of the first conductive area, and the exposed portion of the first conductive area is connected to the busbar component.

7. The battery according to claim 6, characterized in that Along the first direction, a projection of the first window is located within the first conductive region.

8. The battery according to claim 6, characterized in that The first conductive area is connected to the current collecting component by welding, and the second insulating layer is provided with a second window, and the second window is configured to expose a portion of the first conductive area; The projections of the second window and the first window in the first direction at least partially overlap.

9. The battery according to claim 8, characterized in that Projections of the second window and the first window in the first direction overlap with each other.

10. The battery according to claim 8, characterized in that Along the first direction, a projection of the second window is located within the first conductive region.

11. The battery according to claim 5, characterized in that The second insulating layer is provided with a third window, and the third window is configured to expose a portion of the second conductive area, and the exposed portion of the second conductive area is connected to the sampling line.

12. The battery according to claim 11, characterized in that Along the first direction, a projection of the third window is located within the second conductive region.

13. The battery according to claim 3, characterized in that The first insulating layer and the second insulating layer are thermally composite-connected.

14. The battery according to any one of claims 1 to 13, characterized in that The first conductive area is connected to the current collecting component by welding, and the second conductive area is connected to the sampling line by welding.

15. The battery according to claim 14, characterized in that The conductive layer comprises a first foil material and a second foil material which are compositely connected along the first direction, the first foil material is located on a side of the second foil material facing the current collecting component in the first direction, a portion of the first foil material located in the first conductive area is welded to the current collecting component, and a portion of the second foil material located in the second conductive area is welded to the sampling line; The material of the converging component is different from that of the sampling line, the material of the first foil material is the same as that of the converging component, and the material of the second foil material is the same as that of the sampling line.

16. The battery according to claim 14, characterized in that The conductive layer, the current collecting component and the sampling line are made of the same material.

17. The battery according to claim 14, characterized in that The material of the current collecting component is different from that of the sampling line, the material of the first conductive area is the same as that of the current collecting component, and the material of the second conductive area is the same as that of the sampling line.

18. The battery according to claim 1, characterized in that The first conductive region includes a first portion, a second portion, and a third portion that are connected in sequence. The first portion and the third portion are arranged opposite to each other along a second direction, and the second direction is perpendicular to the first direction.

19. The battery according to claim 18, characterized in that Along the second direction, the second conductive area is located between the first portion and the third portion, and two ends of the fuse are respectively connected to the second conductive area and the third portion.

20. The battery according to claim 1, characterized in that Along the first direction, the current collecting component is connected to one side of the battery cell, and the safety device is arranged on a side of the current collecting component away from the battery cell.

21. An electrical device, characterized in that: The invention comprises a battery as claimed in any one of claims 1 to 20, wherein the battery is used to provide electrical energy.

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