Battery device and electric appliance
Patent Information
- Application Number
- CN202621177256.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-07-31
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2036-07-31
Smart Images
Figure CN224908378U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of battery technology, and in particular to a battery device and electrical equipment. Background Technology
[0002] Flexible circuit boards are widely used in battery devices for signal transmission. However, these boards are easily torn or worn when subjected to external forces such as tearing or friction, leading to malfunctions or failures. Especially during installation and use, the interfaces of flexible circuit boards are frequently subjected to mechanical stresses such as vibration, tension, and torsion, causing cracks or even complete tearing at their edges or bending areas, resulting in circuit breaks or signal transmission failures. Utility Model Content
[0003] This application provides a battery device and electrical equipment that can prevent flexible circuit boards from tearing when subjected to mechanical stresses such as vibration, tension and torsion, thereby improving the service life of flexible circuit boards.
[0004] This application provides a battery device, including a housing, a battery cell, and an electrical connector. The housing has an internal cavity in which the battery cell is housed. The electrical connector includes a flexible circuit board, a connector, and a backing plate. The flexible circuit board transmits signals. The connector is disposed at at least one end of the flexible circuit board for electrically connecting the flexible circuit board to a corresponding interface. The backing plate is disposed near the end of the flexible circuit board where the connector is located, and is at least located on one side of the large surface of the flexible circuit board. The backing plate has a tear-resistant portion facing the flexible circuit board. When the flexible circuit board is deformed under stress, the tear-resistant portion provides space for deformation of the flexible circuit board. The backing plate is a soft backing plate made of a flexible material. When the flexible circuit board is deformed under stress, the area of the soft backing plate in contact with the flexible circuit board deforms to form the tear-resistant portion. The thickness of the soft backing plate decreases as it extends along the length of the flexible circuit board and is further away from the connector.
[0005] The battery device provided in this application has a backing plate at the end near the connector on the flexible circuit board, and the backing plate is located at least on one side of the large surface of the flexible circuit board. This protects the flexible circuit board from direct friction when it may rub against other structures. Furthermore, the backing plate has a tear-resistant portion facing the flexible circuit board. When the flexible circuit board deforms due to mechanical stresses such as vibration, tension, and torsion, the tear-resistant portion provides deformation space, reduces stress concentration points, absorbs some energy through its gaps, and disperses the load, thereby reducing the likelihood of material fatigue and tearing of the flexible circuit board and improving its service life.
[0006] In this embodiment, the backing plate is made of a soft material. When the flexible circuit board is twisted by external forces, the elastic properties of the soft backing plate cause it to deform in the contact area. This deformation absorbs the impact force, preventing the circuit board from being subjected to excessive shear stress, thereby reducing the risk of tearing and improving reliability.
[0007] In this embodiment, the thickness decreases towards the distal end to adapt to the deformation gradient of the circuit board. Under tensile force, the distal end of the backing plate is more flexible, reducing rigid constraints and lowering the risk of tearing. The end closer to the connector gains greater cushioning strength to cope with the higher stress density near the connector, while maintaining the lightweight and flexibility of the distal end. When the flexible circuit board deforms, the soft backing plate at the edge is more easily bent, providing uniform cushioning and preventing stress concentration that could lead to tearing. This, in turn, allows the distal region to have stronger flexible deformation capabilities, while simultaneously providing enhanced cushioning for the area near the connector.
[0008] In some embodiments of this application, the flexible backing extends beyond both sides of the flexible circuit board along its width direction.
[0009] In this embodiment, by covering the areas extending beyond the edges, a protective, enveloping structure is formed, enhancing the buffering capacity of the edge areas and preventing the propagation of microcracks caused by edge stress. When the flexible circuit board is subjected to stress in the width direction, the portion of the soft backing plate extending beyond the flexible circuit board provides additional support, dispersing edge stress, preventing tearing of the circuit board edges, and enhancing overall stability.
[0010] In some embodiments of this application, flexible backing plates are provided on both sides of the large surface of the flexible circuit board. Along the width direction of the flexible circuit board, the portions of the flexible backing plates provided on both sides of the large surface of the flexible circuit board that extend beyond the width direction of the flexible circuit board are attached and connected together.
[0011] In this embodiment, after the flexible backing plates on both sides of the large surface of the flexible circuit board are bonded together, the flexible backing plates form a surrounding protection for the flexible circuit board, that is, all-round protection. Moreover, when the flexible circuit board is subjected to torsional force, the load is evenly distributed at the bonding area, reducing local stress peaks, avoiding damage to the circuit board surface, and further improving tear resistance.
[0012] In some embodiments of this application, the flexible circuit board has a weak area near the connector, the width of which is smaller than the width of other locations, or, when the connector is electrically connected to the corresponding interface, the weak area is bent; a soft backing extends from the end of the flexible circuit board along the length direction to completely cover the weak area.
[0013] In this embodiment, the weak area is the region where the width of the flexible circuit board is reduced, or the part that is easily damaged by bending. The weak area is an area where stress is concentrated. After the flexible backing plate covers the weak area, the material deformation of the flexible backing plate absorbs energy during bending or vibration, which can reduce the probability of tearing in the weak area.
[0014] In some embodiments of this application, the thickness of the flexible backing is smaller along the width direction of the flexible circuit board, and the further away from the center of the flexible circuit board, the smaller the thickness.
[0015] In this embodiment, the thickness of the flexible backing plate decreases the further away from the center of the flexible circuit board. The damping gradient from the center to both ends provides sufficient cushioning for the edge areas. When the circuit board deforms, the edge backing plate is more flexible, providing uniform cushioning and preventing stress concentration that could lead to tearing.
[0016] In some embodiments of this application, on at least one side of the large surface of the flexible circuit board, the flexible backing includes at least two sub-backings, which are stacked along the thickness direction of the flexible circuit board.
[0017] In this embodiment, the stacked liner structure improves local buffering and load-bearing capacity, distributing the stress concentration of a single liner. When the flexible circuit board deforms under stress, the stacked sub-liners can slide relative to each other, dispersing shear force, providing multi-level buffering, and enhancing tear resistance.
[0018] In some embodiments of this application, the electrical connector further includes an adhesive layer disposed between adjacent sub-liners to connect the adjacent sub-liners.
[0019] In this embodiment, an adhesive layer is provided between adjacent sub-liners to connect the liners into a whole. The presence of the adhesive layer makes the sub-liners relatively stable, maintains the overall structural integrity during deformation, and enhances the protective effect.
[0020] In some embodiments of this application, the soft liner includes a long fiber layer comprising fibers woven in different directions.
[0021] In this embodiment, the soft liner includes a long fiber layer woven in different directions to achieve multi-directional mechanical reinforcement. This gives the liner higher resistance to multi-directional stress, reduces tearing tendency, and improves durability.
[0022] In some embodiments of this application, the flexible backing includes an integrally formed flexible block on at least one side of the large surface of the flexible circuit board.
[0023] In this embodiment, the soft liner can be a flexible block manufactured in one piece, which simplifies the manufacturing process and reduces the number of parts involved in the process and assembly. Furthermore, the one-piece structure provides better structural uniformity, ensuring even stress distribution during deformation and improving durability.
[0024] In some embodiments of this application, the flexible block is provided with a short fiber set, which includes fibers arranged in multiple different directions or positions.
[0025] In this embodiment, the flexible block contains clusters of short fibers arranged in a staggered pattern. This staggered, multi-directional fiber network enhances the buffering capacity against multi-directional stress, resulting in more uniform force transmission and buffering effects in localized areas. The short fibers provide strong tear resistance while being easier to integrally mold within the flexible block, simplifying the manufacturing process.
[0026] In some embodiments of this application, the flexible backing plate has a plurality of protrusions at the end away from the connector, and the plurality of protrusions are spaced apart along the width direction of the flexible circuit board.
[0027] In this embodiment, a plurality of protrusions are provided at the end of the flexible backing away from the connector. The protrusions are spaced apart along the width direction of the flexible circuit board, similar to the structure of a brush. When deformed, the protrusions act as fulcrums to distribute the load and prevent edge tearing, which can improve the positioning stability and compression resistance of the far-end area.
[0028] In some embodiments of this application, the connector is disposed on the first side of the flexible circuit board, and the soft backing plate disposed on the first side is provided with a clearance groove, and the connector is located in the clearance groove.
[0029] In this embodiment, the connector is disposed on the first side of the flexible circuit board, and the soft backing plate on the first side is provided with a clearance groove. The connector is located in the clearance groove to avoid interference between the connector and the backing plate.
[0030] In some embodiments of this application, the connector is disposed on the first side of the flexible circuit board, and the backing includes a structural backing with a greater hardness than the soft backing. The structural backing and the connector are respectively disposed on both sides of the flexible circuit board, and the structural backing covers at least the area of the connector in the thickness direction of the flexible circuit board.
[0031] In this embodiment, to provide better protection, a structural liner with higher rigidity can be added to improve protection and reduce wear. Furthermore, to prevent pulling at the connector area, the structural liner covers the connector area, preventing the flexible circuit board around the connector from bending or twisting under stress, thus reducing the risk of indentations or tearing.
[0032] In some embodiments of this application, at least a soft liner is provided between the structural liner and the flexible circuit board.
[0033] In this embodiment, a flexible backing plate is disposed between the structural backing plate and the flexible circuit board to achieve comprehensive cushioning. The structural backing plate provides rigid support, protects the connector area, and reduces deformation, while the flexible backing plate absorbs vibration and synergistically reduces the risk of tearing. Thus, the combination of rigid support and flexible cushioning provides multi-layered protection, improving the mechanical performance and long-term reliability of the connection area.
[0034] In some embodiments of this application, the outer edge of the structural liner has a chamfered structure or a rounded structure.
[0035] In this embodiment, the outer edge of the structural liner has a chamfered or rounded structure to smooth the edge contour, reduce stress concentration caused by sharp edges, avoid scratching or crushing the flexible circuit board during assembly or vibration, and improve safety.
[0036] In some embodiments of this application, the liner includes a rigid liner made of a rigid material. The rigid liner and the connector are respectively disposed on both sides of the flexible circuit board. In the thickness direction of the flexible circuit board, the rigid liner at least covers the area of the connector. The tear-resistant part is disposed at the outer edge of the rigid liner. When the flexible circuit board is deformed by force, the tear-resistant part can provide space for the deformation of the flexible circuit board.
[0037] In this embodiment, the backing plate can be a rigid backing plate made of a rigid material, which provides comprehensive protection for the connector connection area and the surrounding flexible circuit board through rigid support and edge buffering. The rigid backing plate provides high-strength protection, while the tear-resistant portion allows for deformation space at the circuit board edges, reducing the possibility of scratches or pressure damage to the flexible circuit board.
[0038] In some embodiments of this application, the tear-resistant portion includes a chamfered structure or a rounded structure disposed at the outer edge of the rigid liner.
[0039] In this embodiment, the chamfered or rounded structure provided at the outer edge of the rigid backing plate makes the edge contour of the rigid backing plate smooth, reducing the possibility of the flexible circuit board being scratched or crushed.
[0040] In some embodiments of this application, the liner is provided with mounting holes, and fasteners are inserted into the mounting holes to fix the electrical connectors to the target position.
[0041] In this embodiment, the flexible circuit board is connected to the corresponding target location via a connector. For better fixation, fasteners can be provided between the electrical connector and the target location. Furthermore, to facilitate fastener installation, the backing plate has mounting holes. The fasteners can pass through these holes, thus avoiding direct fastener mounting positions and facilitating fastener fixation. Additionally, the backing plate can also be secured using the mounting holes.
[0042] A second aspect of this application provides an electrical device, including the battery device of the first aspect, the battery device being used to provide electrical energy.
[0043] The electrical equipment provided in this application, since it includes the battery device of the first aspect, has the same technical effect, namely, it can prevent the flexible circuit board from tearing when subjected to mechanical stresses such as vibration, pulling and torsion, thereby improving the service life of the flexible circuit board. Attached Figure Description
[0044] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0045] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0046] Figure 1 This is a schematic diagram of the structure of a vehicle as the electrical equipment in an embodiment of this application; Figure 2 This is a schematic diagram of the battery device according to an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the battery device with electrical connectors according to an embodiment of this application; Figure 4 This is a partial structural diagram of the battery device with electrical connectors according to an embodiment of this application; Figure 5 This is a side view of the battery device in an embodiment of this application, showing the arrangement of an electrical connector. Figure 6 A three-dimensional structural diagram of a flexible liner for a battery device according to an embodiment of this application, comprising ten layers of sub-liners; Figure 7 A side view of the flexible liner of the battery device according to an embodiment of this application, comprising ten layers of sub-liners; Figure 8 A three-dimensional structural diagram of the flexible liner of the battery device according to an embodiment of this application, including three layers of sub-liners; Figure 9 A side view of the flexible liner of the battery device according to an embodiment of this application, including three layers of sub-liners; Figure 10 A three-dimensional structural diagram of the flexible liner of the battery device according to an embodiment of this application, including a long fiber layer; Figure 11 A three-dimensional structural diagram of a flexible block with a triangular structure, which is the soft liner of a battery device according to an embodiment of this application; Figure 12 A side view of the flexible block with a triangular structure, which is the soft liner of the battery device according to an embodiment of this application; Figure 13 A three-dimensional structural diagram of a flexible block with a trapezoidal structure, which is the soft liner of a battery device according to an embodiment of this application; Figure 14 A three-dimensional structural diagram of a flexible block with a short fiber layer included in the soft liner of a battery device according to an embodiment of this application; Figure 15 A three-dimensional structural diagram of a flexible liner with multiple protrusions for a battery device according to an embodiment of this application; Figure 16 A bottom view of the flexible liner of the battery device according to an embodiment of this application, which has multiple protrusions; Figure 17 This is a three-dimensional structural diagram of the battery device liner, including the structural liner, according to an embodiment of this application. Figure 18 This is a side view of the battery device liner, which is an embodiment of the present application. Figure 19 This is a side view of the battery device liner, which includes a structural liner and a long fiber layer, according to an embodiment of this application. Figure 20 A three-dimensional structural diagram of the battery device according to an embodiment of this application, including upper and lower structural plates; Figure 21 A side view of the battery device liner, which is an embodiment of this application, shows that the liner includes two structural liner plates, an upper one and a lower one. Figure 22 A three-dimensional structural diagram of a battery device according to an embodiment of this application includes a rigid liner with a chamfered structure; Figure 23 A three-dimensional structural diagram of a battery device according to an embodiment of this application includes a rigid liner with an arc-shaped structure; Figure 24 A side view of the battery device liner in an embodiment of this application, including a rigid liner with a chamfered structure; Figure 25The side view of the battery device liner in this embodiment of the application shows a rigid liner with an arcuate structure.
[0047] Explanation of reference numerals in the attached figures: 1000 - Electrical equipment; 100 - Battery device; 200 - Controller; 300 - Motor; 110 - Housing; 1101 - First housing section; 1102 - Second housing section; 120 - Battery cell; 1 - Electrical connector; 11 - Flexible circuit board; 111 - Weak area; 12 - Connector; 13 - Liner; 131 - Soft liner; 1311 - Sub-liner; 1312 - Long fiber layer; 1313 - Flexible block; 1314 - Short fiber cluster; 1315 - Protrusion; 1316 - Clearance groove; 132 - Structural liner; 133 - Rigid liner; 134 - Mounting hole; 14 - Tear-resistant part; 3 - Receiving cavity. Detailed Implementation
[0048] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0049] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.
[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.
[0051] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.
[0052] In this document, the term "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 throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0053] In the description of the embodiments 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, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.
[0054] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0055] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.
[0056] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.
[0057] The following is a detailed description of this application.
[0058] In battery devices using related technologies, flexible circuit boards are used to transmit certain circuits. For example, the acquisition of battery management signals requires collecting signals from each battery and electrically connecting them to the corresponding control system. Due to their inherent low strength, flexible circuit boards may be subjected to external forces such as compression and stretching during assembly or use, and there is a certain probability that they will be torn or worn, causing malfunctions, or even complete failure, resulting in economic losses. During use with the battery device, they are also susceptible to mechanical stresses such as vibration, tension, and torsion, which can easily cause cracks or even complete tearing at the edges or bending areas, resulting in circuit breaks or signal transmission failures.
[0059] Based on this, this application provides a battery device and electrical equipment that can prevent flexible circuit boards from tearing when subjected to mechanical stresses such as vibration, pulling and torsion, thereby improving the service life of flexible circuit boards.
[0060] This application discloses a battery device 100 and an electrical device 1000, which can prevent cracking during vibration and are easy to install with simple procedures.
[0061] The electrical device 1000 disclosed in this application can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, vehicles, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.
[0062] The battery device 100 disclosed in this application embodiment can be used in electrical equipment 1000 that uses batteries as power sources, or as energy storage devices, wherein energy storage devices include energy storage containers, energy storage cabinets, etc.
[0063] In the following embodiments, for ease of explanation, an example of an electrical device 1000 according to one embodiment of this application is a vehicle.
[0064] Figure 1 The diagram illustrates the structure of a vehicle as provided in some embodiments of this application. The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended vehicles, etc. Figure 1 As shown, a battery device 100 is installed inside the vehicle. The battery device 100 can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to power the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source. The vehicle 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, to meet the power needs of the vehicle during starting, navigation, and driving.
[0065] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.
[0066] Figure 2 This is an exploded view of a battery device 100 provided in some embodiments of this application. The battery device 100 mentioned in the embodiments of this application may also include one or more battery cell assemblies (not shown in the figure, please refer to the combination of multiple battery cells 120) for providing voltage and capacity. A battery cell assembly may include multiple battery cells 120, which are connected in series, parallel, or mixed connection through a busbar.
[0067] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 120.
[0068] As an example, a battery cell assembly can be a battery module, which consists of multiple battery cells 120 arranged and fixed to form an independent module.
[0069] As an example, a battery module can be formed by bundling multiple battery cells 120 together with cable ties.
[0070] In some embodiments, such as Figure 2 As shown, the battery device 100 can be a battery pack, which includes a housing 110 and one or more battery cell assemblies, the battery cell assemblies being housed within a housing cavity 3.
[0071] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the receiving cavity 3 by fixing the battery module in the receiving cavity 3.
[0072] As an example, the battery cell assembly can also be housed in the housing cavity 3 by directly fixing multiple battery cells 120 within the housing cavity 3.
[0073] As an example, such as Figure 2 As shown, the housing 110 may include a first housing portion 1101 and a second housing portion 1102. The first housing portion 1101 and the second housing portion 1102 are fastened together, forming a closed space inside the housing 110, namely the receiving cavity 3, to house the battery cell assembly. Here, "closed" refers to covering or closing, which can be either sealed or unsealed. The first housing portion 1101 may be a top cover or a bottom plate.
[0074] In some embodiments, the housing 110 may be part of the vehicle's chassis structure. For example, a portion of the housing 110 may be at least a portion of the vehicle's floor, or a portion of the housing 110 may be at least a portion of the vehicle's crossbeams and longitudinal beams.
[0075] In this embodiment of the application, the battery cell 120 can be a secondary battery. A secondary battery refers to a battery cell 120 that can be used again after being discharged by recharging to activate the active materials.
[0076] The battery cell 120 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.
[0077] Additionally, by way of example, the battery cell 120 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. There are no particular limitations in the embodiments of this application.
[0078] Reference Figure 2 This application provides a battery device 100, including a housing 110, a battery cell 120, and a reference. Figure 3 , Figure 4 and Figure 5 It also includes an electrical connector 1, wherein a receiving cavity is formed inside the housing 110, and the battery cell 120 is housed in the receiving cavity; the electrical connector 1 includes a flexible circuit board 11, a connector 12, and a backing plate 13. The flexible circuit board 11 is used to transmit signals. The connector 12 is disposed at at least one end of the flexible circuit board 11 and is used to electrically connect the flexible circuit board 11 to a corresponding interface. The backing plate 13 is disposed near the end of the flexible circuit board 11 where the connector 12 is disposed, and is at least located on one side of the large surface of the flexible circuit board 11. The backing plate 13 has a tear-resistant portion 14 facing the flexible circuit board 11. When the flexible circuit board 11 is deformed by force, the tear-resistant portion 14 can provide space for the flexible circuit board 11 to deform.
[0079] In this embodiment, the flexible printed circuit board 11 (FPC), also known as a flexible circuit board or flexible circuit board, is a highly reliable and excellent flexible printed circuit board made of polyimide or polyester film as a substrate. It has the characteristics of high wiring density, light weight, thin thickness and good bending performance. It is a bendable circuit board that can realize the transmission of electrical signals.
[0080] Connector 12 is an electronic interface component that enables electrical connection between the flexible circuit board 11 and external devices. It can be a quick-connect type, meaning that electrical connection is achieved simply by plugging it in.
[0081] The liner 13 is a support structure located on one side of the flexible circuit board 11, which can provide physical protection.
[0082] The tear-resistant portion 14 is a specific area on the liner 13 that provides a buffer space when the flexible circuit board 11 deforms. The tear-resistant portion 14 can be a part of the liner 13, corresponding to a specific location on the flexible circuit board 11, or it can be all areas of the liner 13. The liner 13 can deform under stress, thereby providing deformation space.
[0083] The connector 12 is disposed at at least one end of the flexible circuit board 11, referring to the connection position of the flexible circuit board 11 in this embodiment of the application. It can be that the connector 12 is disposed at one end and the other end is directly soldered to the corresponding position, or that the connector 12 is disposed at both ends. For example, one end of the flexible circuit board 11 is electrically connected to a busbar component on the battery cell 120, and the other end is electrically connected to the battery management system (BMS) via the connector 12. The busbar component can be a palladium sheet, a busbar, etc.
[0084] The battery device 100 provided in this application has a liner 13 at one end near the connector 12 of the flexible circuit board 11, and the liner 13 is located at least on one side of the large surface of the flexible circuit board 11. In this way, when the flexible circuit board 11 may rub against other structures, the liner 13 can protect the flexible circuit board 11 from direct friction. Moreover, the liner 13 is provided with a tear-resistant part 14 facing the flexible circuit board 11. When the flexible circuit board 11 is deformed by mechanical stress such as vibration, tension and torsion, the tear-resistant part 14 reduces stress concentration points by providing deformation space. The gaps in the tear-resistant part 14 absorb part of the energy and distribute the load, thereby reducing the possibility of material fatigue and tearing of the flexible circuit board 11 and improving the service life of the flexible circuit board 11.
[0085] Reference Figure 4 In some embodiments of this application, the liner 13 includes a soft liner 131 made of a flexible material. When the flexible circuit board 11 is deformed by force, the area where the soft liner 131 contacts the flexible circuit board 11 is deformed by force to form a tear-resistant part 14.
[0086] The flexible backing plate 131 refers to a backing plate 13 made of elastic material (such as silicone or rubber) that can deform with the circuit board. The materials of the flexible backing plate 131 include, but are not limited to, PI film, foam, tape, adhesive cloth, PVC, woven fabric, woven mesh tube, rubber, nylon, leather, plastic film, blister sheet, etc.
[0087] The area where the flexible backing plate 131 contacts the flexible circuit board 11 refers to the interface where the flexible backing plate 131 and the flexible circuit board 11 are directly bonded.
[0088] In this embodiment, the liner 13 is made of a soft material. When the flexible circuit board 11 is twisted by external force, the elastic properties of the soft liner 131 cause it to deform in the contact area. This deformation absorbs the impact force, preventing the circuit board from bearing excessive shear stress, thereby reducing the risk of tearing and improving reliability.
[0089] Reference Figure 6 In some embodiments of this application, along the width direction of the flexible circuit board 11, the flexible backing plate 131 extends beyond both sides of the flexible circuit board 11 in the width direction.
[0090] The width direction refers to the lateral dimension of the flexible circuit board 11.
[0091] In this embodiment, by covering the areas extending beyond the edges, a protective enveloping structure is formed, enhancing the buffering capacity of the edge areas and preventing the propagation of microcracks caused by edge stress. When the flexible circuit board 11 is subjected to force in the width direction, the portion of the soft backing plate 131 extending beyond the flexible circuit board 11 provides additional support, dispersing edge stress, preventing tearing of the circuit board edges, and enhancing overall stability.
[0092] Reference Figure 6 and Figure 7 In some embodiments of this application, flexible backing plates 131 are provided on both sides of the large surface of the flexible circuit board 11. Along the width direction of the flexible circuit board 11, the flexible backing plates 131 provided on both sides of the large surface of the flexible circuit board 11 extend beyond the width direction of the flexible circuit board 11 and are attached together.
[0093] The large surfaces of the flexible circuit board 11 refer to the main surfaces of the flexible circuit board 11, which can be the two surfaces with the largest area of the flexible circuit board 11.
[0094] Flexible circuit board 11 has flexible backing plates 131 on both sides of its large surfaces, meaning that at least one flexible backing plate 131 is provided on each of the two opposite large surfaces of the flexible circuit board 11. The flexible circuit board 11 can also be a plate-like structure with two opposite large surfaces, but it is thinner, resulting in a smaller lateral area and extension. Here, the flexible backing plates 131 can be disposed on both sides of the two large surfaces on the upper and lower surfaces of the flexible circuit board 11.
[0095] "Closely connected together" means that the parts of the two side lining plates 13 that extend beyond each other are tightly connected together by bonding or pressing.
[0096] In this embodiment, after the soft backing plates 131 on both sides of the large surface of the flexible circuit board 11 are bonded together, the soft backing plates 131 form a surrounding protection for the flexible circuit board 11, that is, all-round protection. Moreover, when the flexible circuit board 11 is subjected to torsional force, the load is evenly distributed at the bonding area, reducing local stress peaks, avoiding damage to the circuit board surface, and further improving tear resistance.
[0097] Reference Figure 4 and Figure 6 In some embodiments of this application, the flexible circuit board 11 has a weak area 111 near the connector 12, the width of the weak area 111 is smaller than the width of other locations, or, when the connector 12 is electrically connected to the corresponding interface, the weak area 111 is bent; the soft liner 131 extends from the end of the flexible circuit board 11 along the length direction to completely cover the weak area 111.
[0098] The weak area 111 refers to the area where the width of the flexible circuit board 11 is reduced, or the part that is easily damaged due to bending.
[0099] The soft liner 131 completely covers the weak area 111, meaning that the soft liner 131 is at least larger than the weak area 111, and the weak area 111 is completely within the protection range of the soft liner 131.
[0100] In this embodiment, the weak area 111 is a region where stress is relatively concentrated. After the soft liner 131 covers the weak area 111, the material deformation of the soft liner 131 absorbs energy when bending or vibrating, which can reduce the probability of tearing in the weak area 111.
[0101] In some embodiments of this application, the thickness of the flexible backing plate 131 is smaller along the width direction of the flexible circuit board 11, and the further away from the center of the flexible circuit board 11 it is.
[0102] In this embodiment, the thickness of the flexible backing plate 131 decreases the further away from the center of the flexible circuit board 11, and the damping gradient from the center to both ends provides sufficient cushioning for the edge areas. When the circuit board deforms, the edge backing plate 13 is more flexible, providing uniform cushioning and preventing stress concentration from causing tearing.
[0103] It should be noted that the thickness of the flexible backing plate 131 decreases as it moves further away from the center of the flexible circuit board 11. This decrease can be gradual or linear, presenting a smooth, sloping surface. In the embodiment of the sloping surface, it can be a straight sloping surface, an arc-shaped sloping surface, or other forms of sloping surface.
[0104] Reference Figure 6 , Figure 8 and Figure 9 In some embodiments of this application, the thickness of the flexible backing plate 131 is smaller as it extends along the length of the flexible circuit board 11 and is further away from the connector 12.
[0105] The width direction refers to the longitudinal dimension of the flexible circuit board 11.
[0106] In this embodiment, the thickness decreases towards the distal end to accommodate the deformation gradient of the circuit board. Under tensile force, the distal end liner 13 exhibits greater flexibility, reducing rigid constraints and lowering the risk of tearing. The end closer to the connector 12 receives greater cushioning strength to cope with the higher stress density near the connector 12, while maintaining lightweight and flexibility at the distal end. When the flexible circuit board 11 deforms, the soft liner 131 at the edge is more easily bent, providing uniform cushioning and preventing stress concentration that could lead to tearing. Consequently, the distal region can possess stronger flexible deformation capabilities, while simultaneously providing enhanced cushioning for the region near the connector 12.
[0107] It should be noted that the thickness of the flexible backing plate 131 decreases as it moves further away from the connector 12. This can be either a stepped decrease in thickness or a linear decrease in thickness along a smooth slope. In the embodiments of the slope, it can be a straight slope, an arc-shaped slope, or other forms of slope.
[0108] Reference Figure 7 and Figure 9 In some embodiments of this application, on at least one side of the large surface of the flexible circuit board 11, the flexible backing 131 includes at least two sub-backings 1311, which are stacked along the thickness direction of the flexible circuit board 11.
[0109] Sub-slab 1311 refers to an independent slab 13 unit with a layered structure. The number of sub-slabs 1311 can be 1 to 30 without limitation. The number of sub-slabs 1311 is based on one side of the large surface of the flexible circuit board 11. Moreover, when there is only one sub-slab 1311, there are no other sub-slabs 1311 stacked with it on the same large surface.
[0110] Reference Figure 6 and Figure 7 In some embodiments, the sub-liner 1311 located on the same large surface has ten layers, and the thickness of each layer can be 0.1-3mm; Reference Figure 8 and Figure 9 In some other embodiments, the sub-liner 1311 located on the same large surface has three layers, each with a thickness of 0.3-5 mm.
[0111] The flexible backing plate 131 includes at least two sub-backing plates 1311, meaning that the flexible backing plate 131 includes two or more sub-backing plates 1311. On the same large surface of the flexible circuit board 11, if there are two or more sub-backing plates 1311, they can be stacked.
[0112] The inclusion of at least two sub-backers 1311 on at least one side of the large surface of the flexible circuit board 11 means that the sub-backers 1311 can be provided on either side of the large surface of the flexible circuit board 11, or on both sides. Moreover, on the side where the sub-backers 1311 are provided, there are at least two sub-backers 1311.
[0113] The two sub-sheets 1311 are stacked, including partial and complete stacking of the sub-sheets 1311 with each other.
[0114] In this embodiment, the stacked liner 13 structure improves local buffering and load-bearing capacity, and distributes the stress concentration of a single liner 13. When the flexible circuit board 11 is deformed under stress, the stacked sub-liners 1311 can slide relative to each other, dispersing shear force, providing multi-level buffering, and improving tear resistance.
[0115] It should be noted that the multiple sub-sheets 1311 can be stacked in an aligned manner or staggered to enhance flexibility. In some embodiments, the length of the outer edges of the multiple sub-sheets 1311 gradually increases, forming a stepped structure.
[0116] In some embodiments of this application, the electrical connector 1 further includes an adhesive layer disposed between adjacent sub-liners 1311 to connect the adjacent sub-liners 1311.
[0117] The adhesive layer refers to a layer formed by adhesive or hot melt adhesive that has adhesive properties, which can bond adjacent sub-liners 1311 together. The adhesive layer can be made of acrylic adhesive, with a thickness of 0.1 mm, and uniformly applied to the interface of the sub-liners 1311.
[0118] In this embodiment, an adhesive layer is provided between adjacent sub-liners 1311, which can connect the individual liners 13 into a whole. The presence of the adhesive layer makes the sub-liners 1311 relatively stable, maintaining the overall structural integrity during deformation and enhancing the protective effect.
[0119] Reference Figure 10 In some embodiments of this application, the soft liner 131 includes a long fiber layer 1312, which includes fibers woven in different directions.
[0120] Long fiber layer 1312 refers to the reinforcing material layer, such as glass fiber or carbon fiber woven mesh.
[0121] In this embodiment, the soft liner 131 includes a long fiber layer 1312, with the long fibers woven in different directions to achieve multi-directional mechanical reinforcement. This gives the liner 13 higher resistance to multi-directional stress, reduces tearing tendency, and improves durability.
[0122] In this embodiment, the flexible liner 131 may only have a long fiber layer 1312, or it may have other non-long fiber layers 1312. For example, the flexible liner 131 includes sub-liners 1311 and long fiber layers 1312. The long fiber layers 1312 may be located between adjacent sub-liners 1311 or on the outside of all sub-liners 1311. The long fiber layers 1312 and the sub-liners 1311 can be bonded together. The long fiber layers 1312 greatly improve the tear resistance of the entire flexible liner 131.
[0123] Reference Figure 11 , Figure 12 and Figure 13 In some embodiments of this application, on at least one side of the large surface of the flexible circuit board 11, the flexible backing 131 includes an integrally formed flexible block 1313.
[0124] The 1313 flexible block, which is manufactured as a single piece without seams, is produced in one molding process. For example, the 1313 flexible block can be injection molded from silicone, rubber, or other materials.
[0125] In this embodiment, the soft liner 131 can be a flexible block 1313 integrally molded, which simplifies the manufacturing process and reduces the number of parts in the process and assembly. At the same time, the integral structure can have better structural uniformity, and the stress is evenly distributed during deformation, thus improving durability.
[0126] Reference Figure 14 In some embodiments of this application, the flexible block 1313 is provided with a short fiber set 1314, which includes fibers arranged in multiple different directions or positions.
[0127] Short fiber set 1314 refers to a collection of dispersed short fiber reinforcements. For example, the short fibers can be nylon fibers randomly distributed in silicone or rubber blocks, and their length can be 1 mm to 3 mm.
[0128] In this embodiment, the flexible block 1313 contains a short fiber cluster 1314, with the short fibers arranged in a staggered direction. The staggered multi-directional fiber network enhances the buffering capacity against multi-directional stress, resulting in a more uniform force transmission and buffering effect in local areas. The short fibers provide strong tear resistance and are easier to integrally mold within the flexible block 1313, simplifying the manufacturing process.
[0129] Reference Figure 15 and Figure 16 In some embodiments of this application, the flexible backing plate 131 is provided with a plurality of protrusions 1315 at one end away from the connector 12, and the plurality of protrusions 1315 are spaced apart along the width direction of the flexible circuit board 11.
[0130] A protrusion 1315 refers to a raised structure provided on the edge of the flexible backing plate 131. It can be located on one side of the flexible circuit board 11 along its length or on one side of its width. The protrusion 1315 can be semi-circular, triangular, trapezoidal, elongated, etc. Multiple protrusions 1315 can form a brush-like structure at the edge of the flexible backing plate 131.
[0131] In this embodiment, a plurality of protrusions 1315 are provided at the end of the flexible liner 131 away from the connector 12. The protrusions 1315 are spaced apart along the width direction of the flexible circuit board 11, similar to the structure of a brush. When deformed, the protrusions 1315 act as fulcrums to distribute the load and prevent edge tearing, which can improve the positioning stability and compression resistance of the far end area.
[0132] Reference Figure 4 , Figure 6 and Figure 8 In some embodiments of this application, the connector 12 is disposed on the first side of the flexible circuit board 11, and the soft backing plate 131 disposed on the first side is provided with a relief groove 1316, and the connector 12 is located in the relief groove 1316.
[0133] The clearance groove 1316 refers to a notch or opening provided on the flexible backing plate 131, which can avoid the connector 12. In some embodiments, the clearance groove 1316 is slightly larger than the connector 12, and its depth is the same as the thickness of the flexible backing plate 13 provided on the first side of the flexible circuit board 11.
[0134] In this embodiment, the connector 12 is disposed on the first side of the flexible circuit board 11, and the soft backing plate 131 on the first side is provided with a relief groove 1316. The connector 12 is located in the relief groove 1316 to avoid interference between the connector 12 and the backing plate 13.
[0135] Reference Figure 17 and Figure 18 In some embodiments of this application, the connector 12 is disposed on the first side of the flexible circuit board 11, and the liner 13 includes a structural liner 132, the structural liner 132 having a higher hardness than the soft liner 131; the structural liner 132 and the connector 12 are respectively disposed on both sides of the flexible circuit board 11, and in the thickness direction of the flexible circuit board 11, the structural liner 132 at least covers the area of the connector 12.
[0136] Structural liner 132 refers to a support plate made of rigid materials (such as ABS plastic). Materials for structural liner 132 include, but are not limited to, FR-4, injection molding materials, composite materials, molding materials, metal materials, and ceramic materials. Among these, FR-4 is a glass fiber reinforced epoxy resin laminate widely used in the electronics industry; injection molding is a molding process in which molten plastic is injected into a mold cavity under pressure, and after cooling and solidification, a plastic product is obtained. It is one of the most mainstream and widely used molding methods in plastic processing; compression molding (also known as compression molding) involves placing powdered, granular, or fibrous plastic into a mold cavity at the molding temperature, then closing the mold and applying pressure to shape and solidify it; composite materials are a new type of material composed of two or more substances with different physical and chemical properties, combined at the macroscopic or microscopic scale through physical or chemical methods.
[0137] In this embodiment, to provide better protection for the liner 13, a structural liner 132 with higher rigidity can be added to improve protection and reduce wear. Furthermore, to prevent pulling at the connector 12, the structural liner 132 covers the area of the connector 12, preventing the flexible circuit board 11 around the connector 12 from being bent or twisted under stress, thus reducing the risk of indentation or tearing at this location.
[0138] Reference Figure 17 and Figure 18 In some embodiments of this application, at least a soft liner 131 is provided between the structural liner 132 and the flexible circuit board 11.
[0139] At least one flexible backing plate 131 is provided between the structural backing plate 132 and the flexible circuit board 11. The flexible backing plate 131 can be a single-layer sub-backing plate 1311, a multi-layer sub-backing plate 1311, or an integrally formed flexible block 1313. The structural backing plate 132, the flexible circuit board 11, and the flexible backing plate 131 can all be bonded and fixed together by adhesive layers.
[0140] In this embodiment, a flexible backing plate 131 is disposed between the structural backing plate 132 and the flexible circuit board 11 to achieve comprehensive cushioning. The structural backing plate 132 provides rigid support, protecting the connector 12 area and reducing deformation, while the flexible backing plate 131 absorbs vibration and synergistically reduces the risk of tearing. Thus, the combination of rigid support and flexible cushioning provides multi-layered protection, improving the mechanical performance and long-term reliability of the connection area.
[0141] In some embodiments, the structural liner 132 is disposed on one side of the large surface of the flexible circuit board 11, as shown in the figure. Figure 17 and Figure 18The structural liner 132 is disposed below the flexible circuit board 11, and a soft liner 131 is provided between the structural liner 132 and the flexible circuit board 11.
[0142] In some embodiments, refer to Figure 19 In addition to the long fiber layer 1312, a structural liner 132 can also be provided, which is located on one side of the large surface of the flexible circuit board 11.
[0143] In some embodiments, the structural backing plate 132 may be provided on both sides of the large surface of the flexible circuit board 11, as shown in the figure. Figure 20 and Figure 21 The structural backing plate 132 is disposed above and below the flexible circuit board 11, and a soft backing plate 131 is provided between the structural backing plate 132 and the flexible circuit board 11. In some embodiments of this application, the outer edge of the structural liner 132 has a chamfered structure or a rounded structure.
[0144] In this embodiment, the chamfered structure refers to the structure formed by beveling the outer edge of the structural liner 132. The chamfer angle can be selected from various options, such as 30 degrees, 45 degrees, 60 degrees, etc.
[0145] A rounded structure refers to a structure where the outer edge of the liner 132 is rounded. In some embodiments, the radius of the rounded structure can be 0.2-0.5 mm.
[0146] In this embodiment, the outer edge of the structural liner 132 has a chamfered or rounded structure to smooth the edge contour, reduce stress concentration caused by sharp edges, avoid scratching or crushing the flexible circuit board 11 during assembly or vibration, and improve safety.
[0147] Reference Figure 22 and Figure 23 In some embodiments of this application, the liner 13 includes a rigid liner 133 made of a rigid material. The rigid liner 133 and the connector 12 are respectively disposed on both sides of the flexible circuit board 11. In the thickness direction of the flexible circuit board 11, the rigid liner 133 at least covers the area of the connector 12. The tear-resistant part 14 is disposed at the outer edge of the rigid liner 133. When the flexible circuit board 11 is deformed by force, the tear-resistant part 14 can provide space for the flexible circuit board 11 to deform.
[0148] The rigid liner 133, made of rigid materials, refers to a plate made of metal or hard plastic. It can be made of the same material as the structural liner 132. Materials for the rigid liner 133 include, but are not limited to, FR-4, injection molded materials, composite materials, molding materials, metal materials, and ceramic materials. In some embodiments, the rigid liner 133 can be made of aluminum alloy with a thickness of 1 mm.
[0149] In this embodiment, the liner 13 can be a rigid liner 133 made of a rigid material, which provides comprehensive protection for the area connected to the connector 12 and the surrounding flexible circuit board 11 through rigid support and edge buffering. The rigid liner 133 provides high-strength protection, and the tear-resistant part 14 allows for deformation space at the edge of the circuit board, reducing the possibility of the flexible circuit board 11 being scratched or crushed.
[0150] Reference Figure 22 and Figure 23 In some embodiments of this application, the tear-resistant portion 14 includes a chamfered structure or a rounded structure disposed at the outer edge of the rigid liner 133.
[0151] In this embodiment, the chamfered structure refers to the structure formed by beveling the outer edge of the rigid liner 133. The chamfer angle can be selected from various options, such as 30 degrees, 45 degrees, 60 degrees, etc.
[0152] The arc structure refers to the outer edge of the rigid liner 133 being rounded. In some embodiments, the radius of the arc structure can be 0.2-0.5 mm.
[0153] In this embodiment, the chamfered or rounded structure provided at the outer edge of the rigid backing plate 133 makes the edge contour of the rigid backing plate 133 smooth, reducing the possibility of the flexible circuit board 11 being scratched or crushed.
[0154] Among them, reference Figure 22 and Figure 24 A chamfered structure is provided at the outer edge of the rigid liner 133; refer to Figure 23 and Figure 25 An arc-shaped structure is provided at the outer edge of the rigid liner 133.
[0155] Reference Figure 4 Figure 6 and Figure 8 In some embodiments of this application, the liner 13 is provided with mounting holes 134, and fasteners are inserted into the mounting holes 134 to fix the electrical connector 1 to the target position.
[0156] Mounting hole 134 refers to a screw hole or a through hole.
[0157] Fasteners refer to screws or bolts. Their size matches the mounting hole 134.
[0158] In this embodiment, the flexible circuit board 11 is connected to the corresponding target location via a connector 12. For better fixation, fasteners can be provided between the electrical connector 1 and the target location. Furthermore, to facilitate fastener fixation, the liner 13 is provided with mounting holes 134. Fasteners can pass through these mounting holes 134, thus avoiding the fastener's mounting position and facilitating fastener fixation. Additionally, the liner 13 can also be fixed using the mounting holes 134.
[0159] Reference Figure 1 The second aspect of this application provides an electrical device 1000, including a battery device 100 as described in the first aspect, the battery device 100 being used to provide electrical energy.
[0160] The electrical device 1000 provided in this application has the same technical effect as the battery device 100 of the first aspect, namely, it can prevent the flexible circuit board 11 from tearing when subjected to mechanical stresses such as vibration, pulling and torsion, thereby improving the service life of the flexible circuit board 11.
[0161] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A battery device, characterized in that, include: The box-shaped enclosure has an internal cavity for receiving contents. A single battery cell is housed within the receiving cavity; An electrical connector includes a flexible circuit board, a connector, and a backing plate. The flexible circuit board is used for transmitting signals. The connector is disposed at at least one end of the flexible circuit board for electrically connecting the flexible circuit board to a corresponding interface. The backing plate is disposed near the end of the flexible circuit board where the connector is disposed, and is at least located on one side of the large surface of the flexible circuit board. The backing plate has a tear-resistant portion facing the flexible circuit board, which provides space for the flexible circuit board to deform under stress. The liner includes a soft liner made of a flexible material. When the flexible circuit board is deformed under stress, the area of the soft liner in contact with the flexible circuit board deforms under stress to form the tear-resistant part. The thickness of the flexible backing plate decreases as it extends along the length of the flexible circuit board and is further away from the connector.
2. The battery device according to claim 1, characterized in that, Along the width direction of the flexible circuit board, the flexible backing extends beyond both sides of the flexible circuit board in the width direction.
3. The battery device according to claim 2, characterized in that, The flexible circuit board has flexible backing plates on both sides of its large surface. Along the width direction of the flexible circuit board, the flexible backing plates on both sides of the large surface of the flexible circuit board extend beyond the width direction of the flexible circuit board and are attached together.
4. The battery device according to claim 1, characterized in that, The flexible circuit board has a weak area near the connector, and the width of the weak area is smaller than the width of other areas; or, when the connector is electrically connected to the corresponding interface, the weak area is bent. The flexible backing extends from the end of the flexible circuit board along its length to completely cover the weak area.
5. The battery device according to claim 2, characterized in that, Along the width direction of the flexible circuit board, and the further away from the center of the flexible circuit board, the smaller the thickness of the flexible backing.
6. The battery device according to claim 1, characterized in that, On at least one side of the large surface of the flexible circuit board, the flexible backing includes at least two sub-backings, which are stacked along the thickness direction of the flexible circuit board.
7. The battery device according to claim 6, characterized in that, The electrical connector further includes an adhesive layer disposed between adjacent sub-liners to connect the adjacent sub-liners.
8. The battery device according to claim 6, characterized in that, The soft lining includes a long fiber layer comprising fibers woven in different directions.
9. The battery device according to claim 1, characterized in that, On at least one side of the large surface of the flexible circuit board, the flexible backing includes an integrally formed flexible block.
10. The battery device according to claim 9, characterized in that, The soft liner includes a set of short fibers disposed within the flexible block, the set of short fibers comprising fibers staggered along multiple different directions or positions.
11. The battery device according to claim 1, characterized in that, The flexible backing plate has a plurality of protrusions at one end away from the connector, and the plurality of protrusions are spaced apart along the width direction of the flexible circuit board.
12. The battery device according to claim 1, characterized in that, The connector is disposed on the first side of the flexible circuit board, and the soft backing plate disposed on the first side is provided with a clearance groove, and the connector is located in the clearance groove.
13. The battery device according to claim 1, characterized in that, The connector is disposed on the first side of the flexible circuit board, and the backing plate includes a structural backing plate, the rigidity of which is greater than that of the soft backing plate. The structural backing plate and the connector are respectively disposed on both sides of the flexible circuit board, and the structural backing plate covers at least the area of the connector in the thickness direction of the flexible circuit board.
14. The battery device according to claim 13, characterized in that, At least one flexible backing plate is provided between the structural backing plate and the flexible circuit board.
15. The battery device according to claim 13, characterized in that, The outer edge of the structural liner has a chamfered or rounded structure.
16. The battery device according to claim 1, characterized in that, The liner includes a rigid liner made of a rigid material. The rigid liner and the connector are respectively disposed on both sides of the flexible circuit board. In the thickness direction of the flexible circuit board, the rigid liner at least covers the area of the connector. The tear-resistant part is located at the outer edge of the rigid backing plate. When the flexible circuit board is deformed by force, the tear-resistant part can provide space for the flexible circuit board to deform.
17. The battery device according to claim 16, characterized in that, The tear-resistant part includes a chamfered structure or a rounded structure disposed at the outer edge of the rigid liner.
18. The battery device according to any one of claims 1 to 17, characterized in that, The liner is provided with mounting holes, and fasteners are inserted into the mounting holes to fix the electrical connector in the target position.
19. An electrical appliance, characterized in that, The battery device includes any one of claims 1 to 18, the battery device being used to provide electrical energy.