Battery device and electric device

Abstract

The embodiment of the utility model provides a battery device and a power utilization device, and relates to the technical field of batteries. The battery device comprises a battery single body assembly, a confluence piece, an acquisition assembly and a thermal fusing piece, the battery single body assembly comprises a plurality of battery single bodies, the confluence piece is connected with at least two battery single bodies, and the acquisition assembly is used for acquiring information of the battery single bodies; the acquisition assembly comprises an insulating part and a plurality of wire harnesses, the insulating part wraps the plurality of wire harnesses, and the plurality of wire harnesses comprise a first wire harness; the thermal fusing piece is electrically connected with the first wire harness and the bus piece; wherein at least part of the thermal fusing piece is arranged in the insulating piece, and the part, arranged in the insulating piece, of the thermal fusing piece is connected with the first wire harness. According to the battery device provided by the embodiment of the invention, the process flow of reinforced connection and reinforcement after the thermal fusing piece is connected with the first wire harness can be reduced, so that the complexity of the production and manufacturing process flow of the battery device is reduced, the manufacturing efficiency is improved, and the economical efficiency of the finally obtained battery device is higher.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. In this context, electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the automotive industry's sustainable development. And for electric vehicles, battery technology is a crucial factor in their development.

[0003] In the development of battery technology, the economics of battery devices is an issue that cannot be ignored. If a battery device is not economically viable, it will be difficult to popularize. Therefore, how to improve the economics of battery devices is a technical problem that requires long-term consideration in battery technology. Utility Model Content

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

[0005] This application is achieved through the following technical solution:

[0006] In a first aspect, embodiments of this application provide a battery device, including a battery cell assembly, a busbar, a data acquisition component, and a thermal fuse. The battery cell assembly includes multiple battery cells, the busbar connects at least two battery cells, and the data acquisition component is used to acquire information from the battery cells. The data acquisition component includes an insulating member and multiple wire harnesses, the insulating member covering the multiple wire harnesses, and the multiple wire harnesses including a first wire harness. The thermal fuse is electrically connected to the first wire harness and the busbar. At least a portion of the thermal fuse is disposed within the insulating member, and the portion of the thermal fuse disposed within the insulating member is connected to the first wire harness.

[0007] In the above embodiments, the portion of the thermal fuse disposed within the insulating component is connected to the first wiring harness. This connection area contacts at least a portion of the inner wall of the insulating component. This portion of the inner wall of the insulating component can support and fix the relative position of the thermal fuse and the first wiring harness, thereby achieving a reinforced connection between the thermal fuse and the first wiring harness and strengthening the connection area. The battery device provided by this application embodiment can reduce the process flow of reinforcing and strengthening the thermal fuse after it is connected to the first wiring harness, thereby reducing the complexity of the battery device manufacturing process, improving manufacturing efficiency, and ultimately making the final battery device more economical.

[0008] In some embodiments, the thermal fuse includes a first connecting portion, a thermally fused portion, and a second connecting portion, with the thermally fused portion connecting the first and second connecting portions. The first connecting portion is connected to the busbar, and the second connecting portion is at least partially disposed within an insulating member, with the portion of the second connecting portion disposed within the insulating member connected to the first wiring harness. The thermally fused portion is connected to the first and second connecting portions. When an abnormality occurs in the connection circuit between the busbar and the first wiring harness, the thermally fused portion melts to cut off the current, protecting the circuit's safe operation. Furthermore, by providing the first and second connecting portions to the busbar and the first wiring harness respectively, the determination of the connection area is facilitated, thereby improving the assembly efficiency of the thermal fuse with the busbar and the first wiring harness.

[0009] In other embodiments, the second connection portion is entirely disposed within the insulating member. The entire area containing the second connection portion is covered by the insulating member, ensuring that the contact area between the second connection portion and the first wire harness is completely covered by the insulating member. This strengthens and reinforces the connection between the two, thereby improving the reliability of the connection between the second connection portion and the first wire harness.

[0010] In some other embodiments, the thermal break is at least partially disposed within the insulation member. The insulation member can serve as a reinforcing component, improving the strength of the thermal break.

[0011] In some other embodiments, the thermal break is entirely housed within the insulating member. In this configuration, the insulating member can provide greater reinforcement to the thermal break, thereby increasing its strength.

[0012] In some embodiments, the fusible link is bent. When subjected to vibration and tension, the fusible link can absorb the tensile force, reducing the risk of breakage.

[0013] In some embodiments, the first connecting portion is welded to the busbar, and / or the second connecting portion is welded to the first wiring harness. This improves the connection reliability between the first connecting portion and the busbar, and the connection reliability between the second connecting portion and the first wiring harness.

[0014] In some embodiments, the insulating component includes a first insulating layer and a second insulating layer, which are bonded together. A plurality of wire harnesses are disposed between the first and second insulating layers, and the first and second insulating layers together cover the plurality of wire harnesses. At least a portion of the thermal fuse is disposed between the first and second insulating layers and is covered by both the first and second insulating layers. By using the first and second insulating layers to form the insulating component, it is easier for the insulating component to cover the connection area between the thermal fuse and the first wire harness, thus improving overall manufacturing efficiency.

[0015] In some embodiments, the first insulating layer and the second insulating layer are thermally fused together. This arrangement ensures that the first and second insulating layers together cover the connection area between the thermally fused component and the first wire harness.

[0016] In some embodiments, multiple battery cells in a battery cell assembly are arranged along a first direction, and a data acquisition component is disposed on one side of the battery cells along a second direction. A busbar is disposed on at least one side of the data acquisition component along a third direction, and the first, second, and third directions are perpendicular to each other. The battery device includes a thermal fuse group, which includes multiple thermal fuses spaced apart along the first direction. Multiple first wiring harnesses are included, with each thermal fuse connected to one first wiring harness. Along the third direction, the thermal fuse group is located on the side of the data acquisition component facing the busbar. The arrangement of multiple first wiring harnesses and multiple thermal fuses enables the acquisition of information from multiple battery cells, improving the reliability of the entire battery device.

[0017] In some embodiments, the battery device further includes a control component, and the acquisition component further includes a connector that plugs into the control component. The first wiring harness has a first end and a second end, the first end being connected to the connector. The first wiring harness includes an extension segment extending along a first direction, and the extension segments of a plurality of first wiring harnesses are spaced apart along a third direction. One end of each extension segment is the second end, and a thermal fuse is connected to the second end. Automated detection of the positions of the second ends of the plurality of first wiring harnesses can be used, and then the connection step between the thermal fuse and the first wiring harness can be further performed based on these positions. This facilitates the positioning of the connection area between the thermal fuse and the first wiring harness, thereby improving the connection and assembly efficiency of the first wiring harness and the thermal fuse. Furthermore, the extension segment of the first wiring harness reduces the need for manual bending, improving production efficiency and reducing production costs.

[0018] In some embodiments, along a first direction, a battery cell assembly is disposed on one side of a control element, and the end of the extension segment furthest from the control element is designated as a second end. Among the multiple extension segments connected to multiple thermal fuses in a thermal fuse group, the second end of the extension segment closer to the busbar in adjacent extension segments is closer to the control element along the first direction than the second end of the extension segment furthest from the busbar. Based on this configuration, the extension distance of the first harness located on one side of the acquisition component is shorter, and the extension distance of the first harness located on the other side is longer. When multiple first harnesses are configured, any first harness connecting to a thermal fuse is less likely to affect the connection lines between other first harnesses and their corresponding thermal fuses, thereby reducing the occurrence of multiple circuit overlaps and improving overall reliability.

[0019] In some embodiments, the substrate material of the insulating component is polyimide or polyethylene terephthalate. Choosing this substrate material for the insulating component allows for both meeting specific application requirements and maintaining the economic viability of the insulating component itself.

[0020] In some embodiments, the battery device further includes a temperature detection component connected to a single battery cell or a busbar. The multiple wiring harnesses also include a second wiring harness connected to the temperature detection component. By providing the temperature detection component, temperature information within the battery device, particularly the temperature information of the individual battery cells, can be detected, thereby improving the overall reliability of the battery device.

[0021] Secondly, embodiments of this application provide an electrical device, including the battery device provided in any one of the embodiments of the first aspect.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0025] Figure 2 This is an exploded view of the battery device according to some embodiments of this application;

[0026] Figure 3 This is a schematic diagram of the connection structure between a battery cell and a busbar in some embodiments of this application;

[0027] Figure 4 This is an exploded structural diagram of a battery cell according to some embodiments of this application;

[0028] Figure 5 This is a schematic diagram of the structure of a battery device according to some embodiments of this application;

[0029] Figure 6 This is a partial structural schematic diagram of a battery device according to some embodiments of this application;

[0030] Figure 7 This is a partial view of a battery device according to some embodiments of this application;

[0031] Figure 8 This is a partial structural schematic diagram of a battery device according to some embodiments of this application (wire harness is shown in the acquisition component);

[0032] Figure 9This is a schematic diagram of the connection between the acquisition component and the thermal fuse in some embodiments of this application;

[0033] Figure 10 This is a schematic diagram showing the connection between the acquisition component and the thermal fuse in some other embodiments of this application;

[0034] Figure 11 This is a schematic diagram of the connection between the acquisition component and the thermal fuse in some embodiments of this application;

[0035] Figure 12 This is a schematic diagram showing the connection between the acquisition component and the thermal fuse in some other embodiments of this application;

[0036] Figure 13 This is an exploded structural diagram of the acquisition components in some embodiments of this application;

[0037] Figure 14 This is a schematic diagram of the structure of a data acquisition assembly including some insulating components according to some embodiments of this application;

[0038] Figure 15 This is a schematic diagram of the connection between a data acquisition component and a control component, including partially insulating elements, according to some embodiments of this application;

[0039] Figure 16 This is an exploded view of the acquisition components in some other embodiments of this application;

[0040] icon:

[0041] 1000 - Vehicle; 100 - Battery unit; 200 - Controller; 300 - Motor; 10 - Housing; 11 - First housing; 12 - Second housing; 20 - Battery cell; 201 - Electrode terminal; 202 - Housing; 2021 - Shell; 2022 - End cap; 203 - Electrode assembly; 30 - Busbar; 40 - Data acquisition assembly; 401 - Insulating component; 4011 - First insulating layer; 4012 - Second insulating layer; 402 - Wiring harness; 4021 - First wiring harness; 40211 - First end; 40212 - Second end; 4022 - Second wiring harness; 50 - Thermal fuse; 501 - First connection part; 502 - Thermal fuse part; 503 - Second connection part; 60 - Control component; 70 - Temperature detection assembly;

[0042] X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0045] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0048] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0049] In this application, "multiple" means two or more (including two).

[0050] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0051] Battery cells include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0052] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells.

[0053] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0054] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging multiple battery cells and fixing them together to form an independent module.

[0055] As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0056] In some embodiments, the battery device may be a battery pack, which may include a housing and one or more individual battery cells housed within the housing.

[0057] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0058] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0059] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0060] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0061] As an example, the housing can be part of the vehicle's chassis structure. For instance, the housing's roof can be at least part of the vehicle's floor, or the housing's frame can be at least part of the vehicle's crossbeams and longitudinal beams.

[0062] In some embodiments, the battery device refers to an energy storage device, which includes a housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0063] During the battery device's lifespan, information from individual battery cells can be collected, and then adjusted based on this information to improve cell reliability. This data collection can be achieved by connecting a data acquisition harness to both the individual battery cell and the battery control unit. However, in some applications, abnormal conditions such as large current fluctuations in the circuit containing the data acquisition harness can affect the operational reliability of the battery device.

[0064] To address the above situation, a thermal fuse can be installed in the circuit where the acquisition harness is located. When the current fluctuation in the circuit where the acquisition harness is located exceeds a certain range, the thermal fuse will melt and disconnect the circuit where the acquisition harness is located, thereby reducing the possibility of the battery's operational reliability being affected by abnormalities in the circuit where the acquisition harness is located.

[0065] A thermal fuse is installed in the circuit where the acquisition harness is located. The thermal fuse can be connected between the acquisition harness and the battery cell. However, during the manufacturing process of connecting the acquisition harness and the thermal fuse, the connection reliability is poor because the cross-section of the acquisition harness and the thermal fuse is small. Reinforcement and reinforcement treatment are usually required, which leads to a complex connection manufacturing process, low manufacturing efficiency, and poor economic performance of the final battery device.

[0066] In view of this, embodiments of this application provide a battery device, including a battery cell assembly, a busbar, a data acquisition component, and a thermal fuse. The battery cell assembly includes multiple battery cells, the busbar connects at least two battery cells, the data acquisition component is used to acquire information from the battery cells, the data acquisition component includes an insulating member and multiple wire harnesses, the insulating member covers the multiple wire harnesses, and the multiple wire harnesses include a first wire harness; the thermal fuse electrically connects the first wire harness and the busbar, at least a portion of the thermal fuse is disposed within the insulating member, and the portion of the thermal fuse disposed within the insulating member is connected to the first wire harness.

[0067] In such a battery device, the part where the thermal fuse connects to the insulating part is located inside the insulating part. By covering the insulating part, the connection reliability of the connection between the thermal fuse and the insulating part can be improved. This can reduce the steps of strengthening the connection and correction between the wiring harness and the thermal fuse during the manufacturing process, thereby simplifying the production process, improving manufacturing efficiency, and ultimately improving the economics of the final battery device.

[0068] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells and battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0069] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device.

[0070] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. A battery device 100 is disposed inside the vehicle 1000, and the battery device 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000.

[0071] The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the power needs of the vehicle 1000 during startup, navigation and driving.

[0072] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0073] Please refer to Figure 2 , Figure 2This is an exploded structural diagram of a battery device 100 according to some embodiments of this application. The battery device 100 may include a battery cell 20 and a housing 10, the housing 10 being used to house the battery cell 20.

[0074] The housing 10 has an enclosed space inside for accommodating the battery cells 20. The housing 10 can have various structures. In some embodiments, the housing 10 may include a first housing 11 and a second housing 12, which are interlocked. The first housing 11 and the second housing 12 can have various shapes, such as cuboids or cylinders. The first housing 11 can be a hollow structure open on one side, and the second housing 12 can also be a hollow structure open on one side. The open side of the second housing 12 interlocks with the open side of the first housing 11, thus forming a housing 10 with an enclosed space. Alternatively, the first housing 11 can be a hollow structure open on one side, and the second housing 12 can be a plate-like structure, with the second housing 12 interlocked with the open side of the first housing 11, thus forming a housing 10 with an accommodating space.

[0075] In the battery device 100, there can be one or more battery cells 20. If there are multiple battery cells 20, they can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel. Alternatively, multiple battery cells 20 can be first connected in series, parallel, or in a mixed configuration to form a battery module, and then multiple battery modules can be connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing 10. Another option is that all battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the whole consisting of all battery cells 20 is housed within the housing 10.

[0076] In some embodiments, please refer to Figure 3 , Figure 3 This is a schematic diagram illustrating the connection structure between a battery cell 20 and a busbar 30 in some embodiments of this application. The battery device 100 may further include a busbar 30, through which multiple battery cells 20 can be electrically connected to each other, enabling series, parallel, or mixed connection of multiple battery cells 20. The busbar 30 may be a metallic conductor, such as copper, iron, aluminum, stainless steel, or aluminum alloy.

[0077] In some embodiments, please refer to Figure 4 , Figure 4 This is an exploded structural diagram of a battery cell 20 according to some embodiments of this application. The battery cell 20 may include a housing 202 and an electrode assembly 203, with the electrode assembly 203 housed within the housing 202.

[0078] In some embodiments, the housing 202 may include a housing 2021 and an end cap 2022, the housing 2021 having an opening, and the end cap 2022 closing the opening of the housing 2021. Here, "closing" refers to covering or shutting down, and can be either sealed or unsealed.

[0079] The housing 2021 is a component used to house the electrode assembly 203. The housing 2021 can be a hollow structure with an opening at one end, or a hollow structure with openings at both opposite ends. The housing 2021 can have various shapes, such as cylindrical or cuboid. The housing 2021 can be made of various materials, such as copper, iron, aluminum, steel, or aluminum alloy. The electrode assembly 203 can be partially or completely housed within the housing 2021.

[0080] End cap 2022 and housing 2021 together define a receiving space for accommodating electrode assembly 203 and other components. End cap 2022 can be connected to housing 2021 by welding, roll sealing, or other methods to close the opening of housing 2021. The shape of end cap 2022 can be adapted to the shape of housing 2021. For example, if housing 2021 is a cuboid structure, end cap 2022 can be a rectangular plate structure adapted to housing 2021; or if housing 2021 is a cylindrical structure, end cap 2022 can be a circular plate structure adapted to housing 2021. The material of end cap 2022 can also be various, such as copper, iron, aluminum, steel, aluminum alloy, etc. The materials of end cap 2022 and housing 2021 can be the same or different.

[0081] In an embodiment where the housing 2021 has an opening at one end, one end cap 2022 may be provided. In an embodiment where the housing 2021 has openings at both opposite ends, two end caps 2022 may be provided, with the two end caps 2022 respectively closing the two openings of the housing 2021, and the two end caps 2022 and the housing 2021 together defining the receiving space.

[0082] In some embodiments, the battery cell 20 may further include electrode terminals 201, which are disposed on the housing 202. The electrode terminals 201 are used for electrical connection with the tabs of the electrode assembly 203 to input or output electrical energy from the battery cell 20. The electrode terminals 201 may be disposed on the housing 2021 of the housing 202 or on the end cap 2022 of the housing 202. Electrode terminals 201 of different polarities of a battery cell 20 may be disposed on the same side of the housing 202 or on different sides of the housing 202. The electrode terminals 201 and the tabs may be directly connected, for example, by welding. The electrode terminals 201 and the tabs may also be indirectly connected, for example, by a current collector. The current collector may be a metallic conductor, such as copper, iron, aluminum, steel, or aluminum alloy.

[0083] As an example, in Figure 4 In the illustrated embodiment, one end of the housing 2021 is open, and there is one end cap 2022 in the outer shell 202, which closes one opening of the housing 2021. Two electrode terminals 201 are provided on the end cap 2022, namely a positive electrode terminal 201 and a negative electrode terminal 201. A positive electrode tab and a negative electrode tab are formed on the end of the electrode assembly 203 facing the end cap 2022. The positive electrode terminal 201 is electrically connected to the positive electrode tab, and the negative electrode terminal 201 is electrically connected to the negative electrode tab.

[0084] Please see Figures 5-8 , Figure 5 This is a schematic diagram of the structure of a battery device 100 according to some embodiments of this application; Figure 6 This is a partial structural schematic diagram of a battery device 100 according to some embodiments of this application; Figure 7 This is a partial view of a battery device 100 according to some embodiments of this application; Figure 8 Partial view of a battery device 100 according to some embodiments of this application (wiring harness 402 is shown in the acquisition component 40); Some embodiments of this application provide a battery device 100, including a battery cell assembly, a busbar 30, an acquisition component 40, and a thermal fuse 50. The battery cell assembly includes a plurality of battery cells 20, the busbar 30 connects at least two battery cells 20, the acquisition component 40 is used to acquire information from the battery cells 20, the acquisition component 40 includes an insulating member 401 and a plurality of wiring harnesses 402, the insulating member 401 covers the plurality of wiring harnesses 402, and the plurality of wiring harnesses 402 include a first wiring harness 4021; the thermal fuse 50 is electrically connected to the first wiring harness 4021 and the busbar 30, at least a portion of the thermal fuse 50 is disposed within the insulating member 401, and the portion of the thermal fuse 50 disposed within the insulating member 401 is connected to the first wiring harness 4021.

[0085] The battery assembly 100 can contain one or more battery cells. Each battery cell assembly can contain two, three, or more battery cells 20. Figures 5-8 In the illustrated embodiment, there are multiple battery cell assemblies, which are arranged along a third direction Z. In each battery cell assembly, multiple battery cells 20 are arranged along a first direction X. The acquisition component 40 is disposed on one side of the battery cell assembly along a second direction Y.

[0086] The busbar 30, also known as a busbar or busbar plate, is a component used to connect multiple battery cells 20 in series and parallel. The busbar 30 can be made of metals such as copper, aluminum, aluminum alloy, and nickel, or composite materials. The battery device 100 can have one or more busbars 30. When there are two battery cells 20, one busbar 30 can be used, connecting two battery cells 20 to form a single unit. When there are more than two battery cells 20, multiple busbars 30 can be used, with each busbar 30 connecting at least two battery cells 20 to form a single unit. The two battery cells 20 electrically connected to the busbar 30 can be arranged adjacently or non-adjacently. For example, multiple battery cells 20 in a battery cell assembly are arranged along a first direction X. These multiple battery cells 20 include a first battery cell, a second battery cell, and a third battery cell arranged adjacent to each other. The second battery cell is positioned between the first and third battery cells. A busbar 30 can connect the electrode terminals 201 of the first and second battery cells to electrically connect two adjacent battery cells 20. Alternatively, the busbar 30 can connect the electrode terminals 201 of the first and third battery cells to electrically connect two non-adjacent battery cells 20. The polarities of the electrode terminals 201 of two battery cells 20 connected to the same busbar 30 can be the same or opposite. If the electrode terminals 201 of two batteries connected to the same busbar 30 have the same polarity, the busbar 30 can connect the two battery cells 20 in parallel; if the electrode terminals 201 of two batteries connected to the same busbar 30 have different polarities, the busbar 30 can connect the two battery cells 20 in series.

[0087] The acquisition component 40 is used to acquire information from the battery cell 20. In some examples, the battery device 100 may also include a control component 60. In application scenarios where the control component 60 is present, the control component 60 may be used to send data to the battery cell 20, receive data from the battery cell 20, and process the incoming and outgoing data.

[0088] Among the multiple wire harnesses 402, the wire harness 402 connected to the thermal fuse 50 is the first wire harness 4021. The first wire harness 4021 can be one or multiple. It is possible that all wire harnesses 402 are the first wire harness 4021, or that a portion of the multiple wire harnesses 402 are the first wire harness 4021.

[0089] In all wire harnesses 402, regardless of the number of wire harnesses 402, all wire harnesses 402 can be covered by insulating member 401 to achieve insulation of wire harnesses 402.

[0090] During the fabrication of wire harness 402, it can be manufactured by die-cutting or by winding. In some examples, multiple wire harnesses 402 spaced apart can be obtained by die-cutting a single metal sheet.

[0091] The insulating component 401 is made of insulating material and is used to cover the wire harness 402 to achieve insulation of the wire harness 402. The insulating component 401 can be arranged in a layered structure of insulating material, and then the wire harness 402 is placed between two layers of insulating material to achieve the covering of the wire harness 402. Alternatively, a cavity can be formed in the insulating material, and then the wire harness 402 is placed in the cavity, with the sidewall of the cavity in contact with the wire harness 402 to achieve the covering of the wire harness 402.

[0092] The thermal fuse 50 serves as overload protection in the circuit. When the current in the circuit containing the thermal fuse 50 abnormally rises to a certain level and temperature, the thermal fuse 50 melts and breaks the current, protecting the circuit's safe operation. In this embodiment, the thermal fuse 50 electrically connects the first wiring harness 4021 and the busbar 30 to protect the circuit connected to the first wiring harness 4021 and the busbar 30.

[0093] In some examples, the thermal fuse 50, the first wiring harness 4021, and the busbar 30 may be made of the same material. By reducing the current-carrying area of ​​the thermal fuse 50, its resistance is increased. When an abnormality occurs in the circuit, the thermal fuse 50, due to its higher resistance, is more likely to melt, thus ensuring that the thermal fuse 502 melts itself to cut off the current when the current in the connected circuit is abnormal. Alternatively, the thermal fuse 50 may be made of a different material than the first wiring harness 4021 and the busbar 30. By selecting a material with a lower melting point than the first wiring harness 4021 and the busbar 30, the thermal fuse 502 itself melts itself to cut off the current when the current in the connected circuit is abnormal.

[0094] The portion of the thermal fuse 50 located within the insulating member 401 contacts the inner wall of the insulating member 401, and the insulating member 401 insulates this portion of the thermal fuse 50 from other components. Alternatively, the portion of the thermal fuse 50 may be located within the insulating member 401, and then this portion within the insulating member 401 may be connected to the first wiring harness 4021. Or, the entire thermal fuse 50 may be located within the insulating member 401. When the entire thermal fuse 50 is located within the insulating member 401, the connection between the thermal fuse 50 and the busbar 30 can be indirect; for example, the thermal fuse 50 may be connected to the busbar 30 via a wire. In some examples, when the opposing side walls of the inner side of the insulating member 401 are in contact with each other, the connection area between the thermal fuse 50 located within the insulating member 401 and the first wiring harness 4021 can be pressed together, thus maintaining contact between the thermal fuse 50 and the first wiring harness 4021.

[0095] In the above embodiments, the portion of the thermal fuse 50 disposed within the insulating member 401 is connected to the first wiring harness 4021. This connection area contacts at least a portion of the inner wall of the insulating member 401. This portion of the inner wall of the insulating member 401 can support and fix the relative position of the thermal fuse 50 and the first wiring harness 4021, thereby achieving a reinforced connection between the thermal fuse 50 and the first wiring harness 4021 and strengthening the connection area. The battery device 100 provided in this application embodiment can reduce the process flow of reinforcing and strengthening the thermal fuse 50 after it is connected to the first wiring harness 4021, thereby reducing the complexity of the battery device 100 manufacturing process, improving manufacturing efficiency, and ultimately making the final battery device 100 more economical.

[0096] In some embodiments, please refer to Figure 9 , Figure 9 This is a schematic diagram showing the connection between the acquisition component 40 and the thermal fuse 50 in some embodiments of this application. The thermal fuse 50 includes a first connecting portion 501, a thermal fuse portion 502, and a second connecting portion 503. The thermal fuse portion 502 connects the first connecting portion 501 and the second connecting portion 503. The first connecting portion 501 is connected to the busbar 30. Figure 9 (Not shown), the second connecting portion 503 is at least partially disposed within the insulating member 401, and the portion of the second connecting portion 503 disposed within the insulating member 401 is connected to the first wire harness 4021.

[0097] The first connecting portion 501, the thermally fused portion 502, and the second connecting portion 503 are each partial areas of the thermally fused component 50. The first connecting portion 501 is connected to the busbar 30. This connection can be a portion of the first connecting portion 501 that is connected to the busbar 30, rather than all of the first connecting portion 501 being connected to the busbar 30. Alternatively, the portion connected to the busbar 30 can be considered as the first connecting portion 501. The second connecting portion 503 is similar and will not be described further here.

[0098] The thermally fused portion 502 is connected to the first connecting portion 501 and the second connecting portion 503, mainly meaning that the first connecting portion 501 is electrically connected to the second connecting portion 503 through the thermally fused portion 502. In some examples, the first connecting portion 501 and the second connecting portion 503 may not be directly connected, but only connected through the thermally fused portion 502; alternatively, the first connecting portion 501 and the second connecting portion 503 may be electrically connected through the thermally fused portion 502, and then directly connected through a non-conductive material. By using a non-conductive material to connect the first connecting portion 501 and the second connecting portion 503, the connection reliability of the thermally fused portion 502 can be improved.

[0099] The thermal fuse 50 can be integrally formed. For example, the material of the thermal fuse portion 502 can be the same as that of the first connecting portion 501 and the second connecting portion 503. Then, by setting the current-carrying area of ​​the thermal fuse portion 502 to be smaller than that of the first connecting portion 501 and the second connecting portion 503, the resistance of the thermal fuse portion 502 is increased. When the current in the connected circuit is abnormal, the thermal fuse portion 502 melts itself to cut off the current. Alternatively, the thermal fuse 50 can be separately formed. For example, the material of the thermal fuse portion 502 can be different from that of the first connecting portion 501 and the second connecting portion 503. When the current-carrying area of ​​the thermal fuse portion 502 is the same as that of the first connecting portion 501 and the second connecting portion 503, a material with a lower melting point, such as a fuse, can be selected to ensure that the thermal fuse portion 502 melts itself to cut off the current when the current in the connected circuit is abnormal. Based on this, by adjusting the current-passing area of ​​the thermal fuse 502 and / or adjusting the material of the thermal fuse 502, the thermal fuse 502 can be made to melt and cut off the current when the current of the connected circuit is abnormal.

[0100] When the thermal break component 50 includes a first connecting portion 501, a thermal break portion 502, and a second connecting portion 503, the first connecting portion 501, the thermal break portion 502, and the second connecting portion 503 can be manufactured by die-cutting or etching processes.

[0101] In the above embodiment, the thermal fuse 502 is connected to the first connecting part 501 and the second connecting part 503. When an abnormality occurs in the connection circuit between the busbar 30 and the first wiring harness 4021, the thermal fuse 502 melts itself to cut off the current and protect the circuit from damage. Furthermore, by setting the first connecting part 501 and the second connecting part 503 to be connected to the busbar 30 and the first wiring harness 4021 respectively, it is easier to determine the connection area of ​​the thermal fuse 50, thereby improving the assembly efficiency of the thermal fuse 50 with the busbar 30 and the first wiring harness 4021.

[0102] In other embodiments, please refer to Figure 10 , Figure 10This is a schematic diagram illustrating the connection between the acquisition component 40 and the thermal fuse 50 in other embodiments of this application. The second connection portion 503 is entirely disposed within the insulating member 401. The area where the second connection portion 503 is located is entirely covered by the insulating member 401, which allows the contact area between the second connection portion 503 and the first wire harness 4021 to be entirely covered by the insulating member 401, thereby strengthening the connection and reinforcement between the two, and improving the connection reliability between the second connection portion 503 and the first wire harness 4021.

[0103] In some other embodiments, please refer to Figure 11 , Figure 11 This is a schematic diagram of the connection between the acquisition component 40 and the thermal fuse 50 in some embodiments of this application. The thermal fuse 502 is at least partially disposed within the insulating component 401.

[0104] In some application scenarios, when the cross-section of the thermal break 502 is small, such as when a fuse is used, its strength is relatively low and it is easy to break when subjected to tension. In this case, the thermal break 502 needs to be reinforced.

[0105] In the above configuration, the insulating member 401 can serve as a component that provides reinforcement, thereby increasing the strength of the thermally fused portion 502.

[0106] In some examples, the thermal break portion 502 can be reinforced by setting an insulating substrate and then placing the thermal break portion 502 with a smaller cross-section on the substrate.

[0107] In some other embodiments, please refer to Figure 12 , Figure 12 This is a schematic diagram showing the connection between the acquisition component 40 and the thermal break member 50 in some other embodiments of this application. The thermal break member 502 is entirely disposed within the insulating member 401. In this configuration, the insulating member 401 can reinforce the thermal break member 502 to a greater extent, thereby improving the strength of the thermal break member 502.

[0108] In some embodiments, the thermal break portion 502 is bent. The thermal break portion 502 can be bent in any direction, and after bending, a bending zone is formed. When the thermal break portion 502 is stretched, this bending zone can straighten out. Based on this configuration, when the thermal break portion 502 is subjected to vibration and stretching, it can absorb tensile force, reducing the risk of breakage.

[0109] In some embodiments, the first connecting portion 501 is welded to the busbar 30, or the second connecting portion 503 is welded to the first wire harness 4021. For example, SMT welding or ultrasonic welding can be used to achieve the welding connection between the thermal break component 50 and the busbar 30, or the welding connection between the thermal break component 50 and the first wire harness 4021.

[0110] In other embodiments, the first connection portion 501 is welded to the busbar 30, and the second connection portion 503 is welded to the first wiring harness 4021.

[0111] Based on the above configuration, the connection strength between the first connection part 501 and the busbar 30 can be improved, and / or the connection strength between the second connection part 503 and the first wire harness 4021 can be improved, thereby enhancing the reliability of the connection between the thermal fuse 50 and other components.

[0112] In some embodiments, please refer to Figure 13 , Figure 13 This is an exploded structural diagram of the acquisition component 40 according to some embodiments of this application. The insulating member 401 includes a first insulating layer 4011 and a second insulating layer 4012, which are bonded together. A plurality of wire bundles 402 are disposed between the first insulating layer 4011 and the second insulating layer 4012, and the first insulating layer 4011 and the second insulating layer 4012 together cover the plurality of wire bundles 402. At least a portion of the thermal fuse 50 is disposed between the first insulating layer 4011 and the second insulating layer 4012, and is covered by the first insulating layer 4011 and the second insulating layer 4012.

[0113] The first insulating layer 4011 and the second insulating layer 4012 can be bonded together, and during the bonding process, multiple wire bundles 402 are placed between the first insulating layer 4011 and the second insulating layer 4012, thus covering the multiple wire bundles 402. With the multiple wire bundles 402 covered, the first insulating layer 4011 and the second insulating layer 4012 are in contact with opposite sides of the wire bundles 402. The portions of the first insulating layer 4011 and the second insulating layer 4012 that are not in contact with the wire bundles 402 can be spaced apart or bonded together. With the first insulating layer 4011 and the second insulating layer 4012 covering the multiple wire bundles 402, the multiple wire bundles 402 can remain insulated from each other.

[0114] When the thermal fuse 50 is at least partially disposed between the first insulating layer 4011 and the second insulating layer 4012, the portion of the thermal fuse 50 disposed between the first insulating layer 4011 and the second insulating layer 4012 is connected to the first wire harness 4021. The first insulating layer 4011 and the second insulating layer 4012 respectively contact the opposite sides of the connection between the thermal fuse 50 and the first wire harness 4021, so as to cover the connection area between the thermal fuse 50 and the first wire harness 4021.

[0115] In the specific production process, in order to improve the reliability of the connection, the connection between the thermal fuse 50 and the first wire harness 4021 can be carried out before the first insulation layer 4011 covers the second insulation layer 4012. After the thermal fuse 50 is connected to the first wire harness 4021, the first insulation layer 4011 and the second insulation layer 4012 are then completely covered.

[0116] In the above embodiments, by setting the first insulating layer 4011 and the second insulating layer 4012 to form the insulating component 401, it is convenient for the insulating component 401 to cover the connection area between the thermal fuse 50 and the first wire harness 4021, thereby improving the overall manufacturing efficiency.

[0117] In some embodiments, the first insulating layer 4011 and the second insulating layer 4012 are thermally fused together. This arrangement ensures that the first insulating layer 4011 and the second insulating layer 4012 together cover the connection area between the thermally fused component 50 and the first wire harness 4021. In other embodiments, the first insulating layer 4011 and the second insulating layer 4012 may also be joined by pressing, bonding, or other methods.

[0118] In some embodiments, please refer back to the reference. Figure 8 And see also Figure 14 , Figure 14 This is a schematic diagram of the structure of a data acquisition component 40 including a partial insulating member 401, according to some embodiments of this application. Multiple battery cells 20 in the battery cell assembly are arranged along a first direction X. The data acquisition component 40 is disposed on one side of the battery cells 20 along a second direction Y. A busbar 30 is disposed on at least one side of the data acquisition component 40 along a third direction Z. The first direction X, the second direction Y, and the third direction Z are mutually perpendicular. The battery device 100 includes a thermal fuse group, which includes multiple thermal fuses 50 spaced apart along the first direction X. Multiple first wiring harnesses 4021 are included, and each thermal fuse 50 is connected to one first wiring harness 4021. Along the third direction Z, the thermal fuse group is located on the side of the data acquisition component 40 facing the busbar 30.

[0119] The thermal fuse 50 is used to connect the first wiring harness 4021 and the busbar 30. One thermal fuse 50 can connect one first wiring harness 4021 and one busbar 30. When there are multiple first wiring harnesses 4021, the number of thermal fuses 50 corresponds to the number of first wiring harnesses 4021. When there are multiple thermal fuses 50, all thermal fuses 50 can be grouped. A group of multiple thermal fuses 50 is called a thermal fuse group. The thermal fuse group is located on the side of the acquisition component 40 facing the busbar 30, and is used to connect all busbars 30 located on the third-direction Z side of the acquisition component 40.

[0120] For example, when measuring the current or voltage of a battery cell 20, since multiple battery cells 20 in the battery cell assembly are arranged along the first direction X, two extremely different electrode terminals 201 of the battery cell 20 may be located on opposite sides of the acquisition assembly 40 along the third direction Z. At this time, the busbar 30 is set on one side of the acquisition assembly 40 along the third direction Z, and the thermal fuse group is located on the side of the acquisition assembly 40 facing the busbar 30.

[0121] In the above embodiments, the arrangement of multiple first wiring harnesses 4021 and multiple thermal fuses 50 enables the collection of information from multiple battery cells 20, thereby improving the reliability of the entire battery device 100.

[0122] In some embodiments, please refer to Figure 15 , Figure 15 This is a schematic diagram of the structure of the acquisition component 40, including a partially insulating member 401, connected to the control member 60 in some embodiments of this application. The battery device 100 also includes the control member 60, and the acquisition component 40 also includes a connector that plugs into and mates with the control member 60. Figure 15 (Not shown), the first wire harness 4021 has a first end 40211 and a second end 40212, the first end 40211 being connected to a connector. The first wire harness 4021 includes an extension segment extending along a first direction X, and a plurality of extension segments of the first wire harness 4021 are spaced apart along a third direction Z, one end of the extension segment being the second end 40212, and a thermal fuse 50 being connected to the second end 40212.

[0123] The control unit 60 is connected to multiple wiring harnesses 402 and can be used to process, store, and display the data received by the wiring harnesses 402, as well as to control the battery device 100. The acquisition component 40 includes a connector, which is used to connect and disconnect the acquisition component 40 from the control unit 60. The first end 40211 and the second end 40212 are the opposite sides of the first wiring harness 4021. The first end 40211 is connected to the control unit 60 through the connector. The portion of the first wiring harness 4021 with a predetermined length starting from the second end 40212 is named the extension segment. The extension segment can be considered as the part of the first wiring harness 4021 arranged inside the battery compartment. Based on this setting, the extension segment usually includes only one endpoint, which is the second end 40212.

[0124] The first wire harness 4021 extends along the first direction X, meaning that the extended section of the first wire harness 4021 is in a stretched state and does not have a bent portion. A thermal break member 50 is connected to the second end 40212 of the first wire harness 4021. In some examples, there are multiple first wire harnesses 4021, which are connected to multiple thermal break members 50 in a thermal break member group. The multiple thermal break members 50 in a thermal break member group are spaced apart. Correspondingly, the second ends 40212 of the multiple first wire harnesses 4021 are spaced apart in the first direction X to form multiple second ends 40212 located at different positions.

[0125] The connection between the first wiring harness 4021 and the control component 60 can be achieved by piercing the terminal and crimping the male connector.

[0126] In the above embodiments, the positions of the second ends 40212 of multiple first wire harnesses 4021 can be automatically detected, and then the connection steps between the thermal fuse 50 and the first wire harness 4021 can be further performed based on these positions. This facilitates the positioning of the connection area between the thermal fuse 50 and the first wire harness 4021, thereby improving the connection and assembly efficiency of the first wire harness 4021 and the thermal fuse 50. Furthermore, the extension section of the first wire harness 4021 reduces the need for manual bending, improves production efficiency, and lowers production costs.

[0127] In some embodiments, see still Figure 15 Along the first direction X, the battery cell assembly is disposed on one side of the control member 60, and the end of the extension segment away from the control member 60 is the second end 40212. Among the multiple extension segments connected to the multiple thermal fuses 50 of the thermal fuse group, the second end 40212 of the extension segment closer to the busbar 30 of two adjacent extension segments is closer to the control member 60 along the first direction X than the second end 40212 of the extension segment away from the busbar 30.

[0128] A group of first wire harnesses 4021, which connect multiple thermal fuses 50 within a thermal fuse group, is considered as a group of first wire harnesses 4021. Within this group of first wire harnesses 4021, their arrangement satisfies the arrangement of all first wire harnesses 4021, meaning that the extensions of all first wire harnesses 4021 in this group are spaced apart along the third direction Z. One or more busbars 30 connected to this group of first wire harnesses 4021 are typically located on one side of the group of first wire harnesses 4021 along the third direction Z. In this case, the distances between the extensions of the group of first wire harnesses 4021 and the busbars 30 along the third direction Z are not the same. Therefore, selecting any two extensions of the group of first wire harnesses 4021 will result in one extension being relatively closer to the busbar 30 and the other relatively farther away. Furthermore, the second end 40212 of the extension closer to the busbar 30 is closer to the control element 60 in the first direction X.

[0129] Based on the above settings, the extension distance of the first wire harness 4021 located on one side of the acquisition component 40 is shorter, and the extension distance of the first wire harness 4021 located on the other side is longer. When multiple first wire harnesses 4021 are set, it is difficult for any first wire harness 4021 to affect the connection line between other first wire harnesses 4021 and the corresponding thermal fuse 50 when connecting to the thermal fuse 50, thereby reducing the situation of multiple circuit overlaps and improving the overall reliability.

[0130] In some embodiments, the substrate material of the insulating element 401 is polyimide or polyethylene terephthalate. Choosing this substrate material for the insulating element 401 can meet the specific application scenario while also taking into account the economic efficiency of the insulating element 401 itself.

[0131] In some embodiments, please refer to Figure 16 , Figure 16 The diagram shows an exploded view of the acquisition component 40 in other embodiments of this application. The battery device 100 also includes a temperature detection component 70, which is connected to the battery cell 20 or the busbar 30. The plurality of wiring harnesses 402 also include a second wiring harness 4022, which is connected to the temperature detection component 70. By providing the temperature detection component 70, temperature information within the battery device 100, especially the temperature information of the battery cell 20, can be detected, thereby improving the overall reliability of the battery device 100.

[0132] In some embodiments, the base material of the wire harness 402 may be aluminum, which has good conductivity and is economical, and can meet the usage requirements of the battery device 100.

[0133] In some embodiments of this application, a battery device 100 is provided, including a battery cell assembly, a busbar 30, a data acquisition component 40, and a thermal fuse 50. The battery cell assembly includes multiple battery cells 20. The busbar 30 connects at least two battery cells 20. The data acquisition component 40 is used to acquire information from the battery cells 20. The data acquisition component 40 includes an insulating member 401 and multiple wire harnesses 402. The insulating member 401 covers the multiple wire harnesses 402, and the multiple wire harnesses 402 include a first wire harness 4021. The thermal fuse 50 includes a first connecting portion 501, a thermal fuse portion 502, and a second connecting portion 503. The first connecting portion 501 is welded to the busbar 30, and the second connecting portion 503 is welded to the first wire harness 4021. The thermal fuse portion 502 is connected to the first connecting portion 501 and the second connecting portion 503. The second connecting portion 503 is located inside the insulating member 401, and the thermal fuse portion 502 is bent. The insulating component 401 includes a first insulating layer 4011 and a second insulating layer 4012, which together cover the second connecting portion 503. The first insulating layer 4011 and the second insulating layer 4012 are connected by thermal fusion. Multiple battery cells 20 in the battery cell assembly are arranged along a first direction X. A data acquisition component 40 is disposed on one side of the battery cell 20 along a second direction Y. A busbar 30 is disposed on at least one side of the data acquisition component 40 along a third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. The battery device 100 includes a thermal fusion break group, which includes multiple thermal fusion breakers 50 spaced apart along the first direction X. Multiple first wiring harnesses 4021 are included, with each thermal fusion breaker 50 connected to one first wiring harness 4021. Along the third direction Z, the thermal fusion break group is located on the side of the data acquisition component 40 facing the busbar 30. The battery device 100 also includes a control element 60, and the acquisition component 40 includes a connector that plugs into the control element 60. A first wiring harness 4021 has a first end 40211 and a second end 40212, with the first end 40211 connected to the connector. The first wiring harness 4021 includes an extension segment extending along a first direction X. Multiple extension segments of the first wiring harness 4021 are spaced apart along a third direction Z, with one end of the extension segment being the second end 40212. A thermal fuse 50 is connected to the second end 40212. Along the first direction X, a battery cell assembly is disposed on one side of the control element 60, with the end of the extension segment away from the control element 60 being the second end 40212. Among the multiple extension segments connected to the multiple thermal fuses 50 of the thermal fuse assembly, the second end 40212 of the extension segment closer to the busbar 30 in adjacent extension segments is closer to the control element 60 along the first direction X than the second end 40212 of the extension segment away from the busbar 30. The base material of the insulating component 401 is polyimide or polyethylene terephthalate.The battery device 100 also includes a temperature detection component 70, which is connected to the battery cell 20 or the busbar 30. The multiple wiring harnesses 402 also include a second wiring harness 4022, which is connected to the temperature detection component 70.

[0134] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0135] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: A battery cell assembly, comprising multiple battery cells; A busbar, connecting at least two of the battery cells; A data acquisition component is used to acquire information from the battery cell; the data acquisition component includes an insulating component and multiple wire harnesses, the insulating component covers the multiple wire harnesses, and the multiple wire harnesses include a first wire harness. A thermal fuse connects the first wire harness and the busbar. At least a portion of the thermal break is disposed within the insulating member, and the portion of the thermal break disposed within the insulating member is connected to the first wire harness.

2. The battery device according to claim 1, characterized in that, The thermal break component includes a first connecting portion, a thermal break portion, and a second connecting portion. The thermal break portion connects the first connecting portion and the second connecting portion. The first connecting portion is connected to the busbar. The second connecting portion is at least partially disposed within the insulating component. The portion of the second connecting portion disposed within the insulating component is connected to the first wire harness.

3. The battery device according to claim 2, characterized in that, The second connecting part is integrally disposed within the insulating component.

4. The battery device according to claim 2, characterized in that, The thermal break portion is at least partially disposed within the insulating member.

5. The battery device according to claim 4, characterized in that, The thermal break portion is integrally disposed within the insulating component.

6. The battery device according to claim 2, characterized in that, The heat-fused section is bent.

7. The battery device according to claim 2, characterized in that, The first connecting part is welded to the busbar, and / or the second connecting part is welded to the first wire harness.

8. The battery device according to claim 1, characterized in that, The insulating component includes a first insulating layer and a second insulating layer, the first insulating layer and the second insulating layer are bonded to each other, and a plurality of wire harnesses are disposed between the first insulating layer and the second insulating layer, the first insulating layer and the second insulating layer together cover the plurality of wire harnesses; At least a portion of the thermal break is disposed between the first insulating layer and the second insulating layer, and is covered by both the first insulating layer and the second insulating layer.

9. The battery device according to claim 8, characterized in that, The first insulating layer and the second insulating layer are thermally fused together.

10. The battery device according to any one of claims 1-9, characterized in that, The battery cell assembly has multiple battery cells arranged along a first direction, the acquisition component is disposed on one side of the battery cell along a second direction, and the acquisition component is provided with the busbar on at least one side along a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other; The battery device includes a thermal fuse assembly, which includes a plurality of thermal fuses spaced apart along the first direction. There are multiple first wiring harnesses, and each thermal fuse is connected to one of the first wiring harnesses. Along the third direction, the thermal fuse assembly is located on the side of the acquisition component facing the busbar.

11. The battery device according to claim 10, characterized in that, The battery device further includes a control component, and the acquisition component further includes a connector that plugs into the control component. The first wiring harness has a first end and a second end, and the first end is connected to the connector. The first wire harness includes an extension segment extending along the first direction, and the extension segments of the plurality of first wire harnesses are spaced apart along the third direction. One end of the extension segment is the second end, and the thermal fuse is connected to the second end.

12. The battery device according to claim 11, characterized in that, Along the first direction, the battery cell assembly is disposed on one side of the control element, and the end of the extension segment away from the control element is the second end; In a plurality of extensions connected to a plurality of thermal fuses of the thermal fuse assembly, the second end of the extension closer to the busbar is closer to the control element in the first direction than the second end of the extension farther from the busbar.

13. The battery device according to any one of claims 1-9, characterized in that, The substrate material of the insulating component is polyimide or polyethylene terephthalate.

14. The battery device according to any one of claims 1-9, characterized in that, The battery device further includes a temperature detection component connected to the battery cell or the busbar, and the plurality of wiring harnesses further include a second wiring harness connected to the temperature detection component.

15. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1-14.

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