Flexible printed circuit board assemblies, batteries, and electrical devices

Abstract

The present application provides a flexible printed circuit board assembly, a battery, and an electric device. The assembly includes a plate main body and a sampling terminal, the terminal acquires electrical data of a target member, and a groove is provided in the plate main body, the groove penetrates the plate main body in the thickness direction of the plate main body, the groove divides the plate main body into a main body part, a connection part, and a deformation part, the connection part is connected to the sampling terminal, the deformation part is connected to the main body part and the connection part, and the deformation part is deformable to allow displacement of the connection part relative to the main body part. A groove is provided penetrating the plate main body in the thickness direction of the plate main body, the deformation part and the connection part are formed in the plate main body, and the connection part is connected to the sampling terminal, and when the sampling terminal receives an external force, the deformation part deforms, allowing the sampling terminal to move relative to the main body part, thereby preventing damage to the sampling terminal or the plate main body caused by the sampling terminal not being able to move relative to the plate main body when the external force is received.

Description

Technical Field

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[0001] This application belongs to the field of batteries, and specifically relates to a flexible printed circuit board assembly, a battery, and an electrical device.

[0002] (Cross-reference to related applications) This application claims priority based on a Chinese application named "Flexible Printed Circuit Board Assembly, Battery, and Electrical Device" filed on January 27, 2022, with application number 202220231816.5, and all of its content is incorporated herein by reference.

Background Art

[0003] Batteries are widely used in the field of new energy, including electric vehicles, new energy vehicles, etc. New energy vehicles and electric vehicles have become a new development direction for the automotive industry. In order to easily manage the battery, it is necessary to obtain the voltage and temperature of each battery cell in the battery. In the prior art, generally, the voltage and temperature of the battery cell are obtained by connecting a flexible printed circuit board to each battery cell. However, after the battery is used for a certain period of time, the flexible printed circuit board detaches from the battery cell, and the voltage and temperature of the battery cell cannot be obtained.

Summary of the Invention

Problems to be Solved by the Invention

[0004] An embodiment of this application aims to provide a flexible printed circuit board assembly, a battery, and an electrical device that can improve the problem in the prior art that the flexible printed circuit board detaches from the battery cell after the battery is used for a certain period of time.

Means for Solving the Problems

[0005] In the first aspect, an embodiment of the present application provides a flexible printed circuit board assembly. The flexible printed circuit board assembly comprises a board body and a sampling terminal, the sampling terminal being configured to acquire electrical data of a target member, the board body being provided with a groove, the groove penetrating the board body along the thickness direction of the board body, thereby dividing the board body into a main body, a connecting part, and a deformable part, the connecting part being the part connected to the sampling terminal, the deformable part being connected to the main body and the connecting part, and the deformable part being configured to be deformable to allow displacement of the connecting part relative to the main body.

[0006] In the above-described technical proposal, the flexible printed circuit board assembly has a groove that penetrates the main body of the board in the thickness direction, and a deformable portion and a connecting portion are formed in the main body of the board. The connecting portion is connected to a sampling terminal, and when the sampling terminal is subjected to an external force, the deformable portion deforms, allowing the sampling terminal to move relative to the main body. This prevents damage to the sampling terminal or the main body of the board that would otherwise occur if the sampling terminal were immobile relative to the main body when subjected to an external force. When a battery is used for a certain period of time, expansion displacement occurs in the battery cells, which applies an external force to the sampling terminal. As a result, the sampling terminal of the flexible printed circuit board assembly according to the embodiment of this application can move in accordance with the expansion of the battery cells, so that the flexible printed circuit board assembly does not separate from the battery cells, and the voltage and temperature of the battery cells can be continuously obtained. The main body, connecting portion and deformable portion of the flexible printed circuit board assembly are integrally molded by press working on the main body of the board, making manufacturing simple and relatively efficient.

[0007] As one selectable technical solution for an embodiment of the present application, the plate body has an edge, the groove includes a first groove and a second groove, the first groove includes a first groove segment, a second groove segment and a third groove segment connected in order, one end of the first groove segment penetrates the edge, the second groove segment extends along the extending direction of the edge, the first groove segment and the third groove segment are located on the same side with respect to the second groove segment, one end of the second groove penetrates the edge, and the deformation portion of the plate body is formed in the region between the second groove and the third groove segment.

[0008] In the above proposed technology, by providing a first groove segment and a second groove segment in the main plate, the main body and the connecting part are separated within the main plate. By providing a third groove segment and a second groove in the main plate, the portion between the connecting part and the main body becomes less strong and more easily deformed, and thus a deformable portion is formed between the main body and the connecting part. In this way, when the sampling terminal is subjected to an external force, the external force is transmitted to the connecting part, and the deformable portion is pulled and deformed by the connecting part. As a result, the sampling terminal becomes movable relative to the main body, and damage to the sampling terminal or the main plate that would occur due to the sampling terminal being immobile relative to the main plate when subjected to an external force can be prevented.

[0009] As one selectable technical solution for the embodiments of this application, the second groove extends in a direction approaching the second groove segment from the edge, the third groove segment extends in a direction approaching the edge, and in the direction of extension of the edge, the second groove is located between the third groove segment and the first groove segment.

[0010] In the above proposed technology, the second groove extends from the edge toward the second groove segment, and the second groove is closer to the connection point than the third groove segment. When welding the sampling terminal to the connection point, the heat transferred to the main body by the second groove can be reduced, thereby mitigating the thermal impact on the main body during welding.

[0011] As one selectable technical solution for the embodiments of this application, the second groove includes sequentially connected fourth groove segments and fifth groove segments, one end of the fourth groove segment passing through the edge, and the fifth groove segment and the third groove segment are arranged to wrap around each other, thereby causing the deformation portion to extend along a helical trajectory.

[0012] In the above proposed technology, the third groove segment and the fifth groove segment are wound around each other, causing the deformed portion to extend along a helical trajectory. The deformed portion extending along the helical trajectory is easily deformed and has a relatively large deformation range.

[0013] As one selectable technical solution for the embodiments of this application, the amount of deformation of the deformed portion allows the connecting portion to be displaced beyond the first groove segment along the extending direction of the edge portion.

[0014] In the above proposed technology, the deformation amount of the deformable portion is set such that the connecting portion is displaced to such an extent that it exceeds the first groove segment along the extending direction of the edge, thereby ensuring that the connecting portion has a sufficient amount of displacement relative to the main body to accommodate the expansion displacement of the battery cell.

[0015] As one selectable technical solution for the embodiments of this application, the plate body includes a weak portion, the weak portion being connected to two opposing groove walls of the first groove segment.

[0016] In the above proposed technology, by connecting the vulnerable portion to the two opposing groove walls of the first groove segment, it is possible to contribute to the positioning of the connection portion and the sampling terminal during assembly, thereby improving the accuracy of the connection between the connection portion and the sampling terminal.

[0017] As one selectable technical solution for the embodiments of this application, the deformed portion includes a first winding segment and a second winding segment, one end of the first winding segment and one end of the second winding segment are connected, the first winding segment and the second winding segment are formed to wind in the same direction with their connection point as the winding center, the other end of the first winding segment is connected to the connection portion, and the other end of the second winding segment is connected to the main body portion.

[0018] In the above proposed technology, the deformable portion is formed as a winding structure by winding the first winding segment and the second winding segment in the same direction. This winding structure is easily deformable, has a relatively large deformation range, and can accommodate the expansion displacement of the battery cell.

[0019] As one selectable technical option for the embodiments of this application, the deformed portion extends along an S-shaped trajectory.

[0020] In the above proposed technology, the deformable portion extending along the S-shaped trajectory is easily deformable and has relatively good strength.

[0021] As one selectable technical option for the embodiments of this application, the deformed portion extends along a helical trajectory.

[0022] In the above proposed technology, the deformable portion extending along the helical trajectory is easily deformed and has a relatively large range of deformation.

[0023] In a second aspect, embodiments of the present application further provide a battery, the battery comprising a plurality of battery cells, a busbar, and the flexible printed circuit board assembly described above, wherein the busbar is configured to connect the plurality of battery cells in series or in parallel, and the sampling terminal is connected to the busbar.

[0024] In a third aspect, embodiments of the present application further provide an electrical device, the electrical device including the above-described battery, configured to supply electrical energy.

Brief Description of the Drawings

[0025] To more clearly explain the technical solutions of the embodiments of this application, the drawings necessary for the description of the embodiments will be briefly described below. The drawings to be described merely show some embodiments of this application and do not limit the scope. A person skilled in the art can obtain other related drawings based on these drawings without using inventive capabilities. [Figure 1] It is a schematic configuration diagram of a vehicle according to some embodiments of this application. [Figure 2] It is an exploded view of a battery according to some embodiments of this application. [Figure 3] It is a schematic diagram showing the connection between a flexible printed board assembly and a bus bar according to some embodiments of this application. [Figure 4] It is a schematic configuration diagram of a flexible printed board assembly according to some embodiments of this application. [Figure 5] It is an enlarged view of part A in FIG. 4. [Figure 6] It is a schematic configuration diagram of a flexible printed board assembly according to some other embodiments of this application.

Modes for Carrying Out the Invention

[0026] Hereinafter, with reference to the drawings, the embodiments of the technical solutions of this application will be described in detail. The following embodiments are merely exemplary for more clearly explaining the technical solutions of this application and do not limit the protection scope of this application.

[0027] Unless otherwise specified, all technical terms and scientific terms used in this application have the meanings commonly understood by those skilled in the art. The terms used in this application are merely for explaining specific embodiments and do not limit this application. The terms "comprising", "having" and any variations thereof in the description of the specification, claims and the above drawings of this application mean inclusive inclusion rather than exclusion.

[0028] In the description of the embodiments of this application, technical terms such as "first," "second," etc., are used merely to distinguish different elements and do not explicitly or implicitly indicate relative importance, imply the number of technical features, or define a particular order or distinction between primary and secondary features. In the description of the embodiments of this application, unless otherwise specified, "multiple" means two or more.

[0029] Where the term “Examples” is used in this application, it means that the specific features, configurations, or characteristics described using the Examples are included in at least one Example of this Application. Where this term is used in any part of the Specification, it does not necessarily refer to the same Example, nor is it intended to limit any independent or alternative Example to any other Example. It will be understood by those skilled in the art that the Examples described in this Application may be combined with other Examples.

[0030] In the description of the embodiments of this application, the terms "and / or" are merely used to describe the relationship between related objects and represent three types of relationships. For example, A and / or B can represent three situations: A existing alone, A and B existing simultaneously, or B existing alone. In addition, the symbol " / " in this application generally represents the relationship between the preceding and following related objects indicated by "or".

[0031] In the description of the embodiments of this application, the term "multiple" means two or more (including two), similarly, "multiple sets" means two or more sets (including two sets), and "multiple sheets" means two or more sheets (including two sheets).

[0032] In the description of the embodiments of this application, the directions or positional relationships expressed by technical terms such as "center," "vertical," "horizontal," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are based on the drawings and are merely for the purpose of briefly and simply describing the embodiments of this application. They do not expressly or implicitly suggest that the device or component necessarily has a specific direction, is configured in a specific direction, or is operated in a specific direction, and therefore do not limit the embodiments of this application.

[0033] In the description of the embodiments of this application, unless otherwise specified, technical terms such as "attachment," "connection," "bonding," and "fixing" should be understood in a broad sense. For example, it may be a fixed connection, a removable connection, or an integral connection. Furthermore, it may be a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate object, or the internals of two parts may be in communication or the two parts may interact with each other. Those skilled in the art will be able to understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0034] Currently, from a market development perspective, the applications of batteries are expanding more and more. Batteries are used not only in energy storage and power systems such as hydroelectric power plants, thermal power plants, wind power plants, and solar power plants, but also in electric transportation such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the applications of batteries expand, market demand is also increasing.

[0035] To contribute to battery management, it is necessary to obtain the voltage and temperature of each battery cell. Conventional technology generally obtains the voltage and temperature of each battery cell by connecting a flexible printed circuit board to each battery cell. However, after using the battery for a certain period, the flexible printed circuit board detaches from the battery cells, making it impossible to obtain the voltage and temperature of the battery cells.

[0036] During the charging and discharging process of a battery cell, chemical reactions cause a change in the volume of the battery cell, which generates relative stress at the connection point between the flexible printed circuit board and the battery cell. As the battery is used for a long time, relatively large expansion displacement occurs in the battery cell. Once it expands to a certain extent, the sampling connection point on the flexible printed circuit board may tear or come loose, rendering it unusable and preventing the acquisition of the battery cell's voltage and temperature.

[0037] In view of the above, the inventors have designed a flexible printed circuit board assembly through research, the flexible printed circuit board assembly having a groove that penetrates the main body of the board in the thickness direction, a deformable part and a connecting part formed in the main body of the board, the connecting part being connected to a sampling terminal, and the deformable part deforming when the sampling terminal is subjected to an external force, thereby allowing the sampling terminal to move relative to the main body, thereby preventing damage to the sampling terminal or the main body of the board that would otherwise occur due to the sampling terminal being unable to move relative to the main body of the board when subjected to an external force.

[0038] When a battery is used for a certain period of time, expansion and displacement occur in the battery cells, which applies an external force to the sampling terminal. As a result, the sampling terminal of the flexible printed circuit board assembly according to the embodiment of this application can move in accordance with the expansion of the battery cells, so that the flexible printed circuit board assembly does not separate from the battery cells, and the voltage and temperature of the battery cells can be continuously acquired.

[0039] The main body, connecting parts, and deformation parts of the aforementioned flexible printed circuit board assembly are integrally molded by press working on the main board, making manufacturing simple and relatively efficient.

[0040] The flexible printed circuit board assembly according to the embodiment of this application can be used in a secondary battery or a primary battery, and may be, but is not limited to, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. A battery equipped with the flexible printed circuit board according to this application can be used to configure a power supply system for an electrical device, thereby improving the stability of the battery's performance and its lifespan.

[0041] Embodiments of this application provide electrical devices that use batteries as a power source. Electrical devices include, but are not limited to, mobile phones, tablets, laptop computers, electric toys, power tools, electric cars, electric vehicles, ships, and aircraft. Electric toys can be stationary or mobile, and examples include game consoles, electric car toys, electric boat toys, and electric airplane toys. Aircraft include airplanes, rockets, space shuttles, and spacecraft.

[0042] For the sake of explanation, in the following embodiment, the electrical device according to one embodiment of this application will be described using vehicle 1000 as an example.

[0043] Referring to Figure 1, which is a schematic diagram of vehicle 1000 according to some embodiments of the present application.

[0044] Vehicle 1000 may be a fuel-powered vehicle, a natural gas vehicle, or a new energy vehicle, and the new energy vehicle may be an electric vehicle, a hybrid vehicle, or a range-extender electric vehicle. A battery 100 is located inside vehicle 1000, and the battery 100 is located at the bottom, front, or rear of vehicle 1000. The battery 100 can be used to power vehicle 1000, for example, as a power source for the vehicle 1000's operation. Vehicle 1000 further comprises a control device 200 and an engine 300, the control device 200 controlling the power supply from battery 100 to engine 300, which is used, for example, to power vehicle 1000 for starting, navigation, and work electricity while driving.

[0045] In some embodiments of this application, the battery 100 can be used not only as a power source for steering the vehicle 1000, but also as a power source to provide driving power to the vehicle 1000 in place of or in place of gasoline or natural gas.

[0046] Referring to Figures 2 and 3, Figure 2 is an exploded view of a battery 100 according to some embodiments of the present application. Figure 3 is a schematic diagram showing the connection between a flexible printed circuit board assembly 30 and a busbar 40 according to some embodiments of the present application. The battery 100 includes a housing 10, a battery cell 20, a flexible printed circuit board assembly 30, and a busbar 40, the battery cell 20 being housed within the housing 10. The housing 10 provides a housing space for the battery cell 20 and can use various configurations. In some embodiments, the housing 10 includes a first part 11 and a second part 12, the first part 11 and the second part 12 together define a housing space for housing the battery cell 20. The second part 12 may be a hollow structure with one end open, the first part 11 may be a plate-like structure, and the first part 11 may be installed to cover the open side of the second part 12, so that the housing space is defined by the first part 11 and the second part 12. Alternatively, both the first part 11 and the second part 12 may be hollow structures with one end open, and the open side of the first part 11 may be installed to cover the open side of the second part 12. Of course, the housing 10 formed by the first part 11 and the second part 12 can be of various shapes such as a cylinder or a rectangular prism.

[0047] The battery cell 20 is the smallest constituent unit of the battery 100. In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a manner that includes both. Connecting in a manner that includes both means that among the multiple battery cells 20, some are connected in series and others are connected in parallel. Multiple battery cells 20 may be directly connected in series, in parallel, or in a manner that includes both, and the integrated unit consisting of multiple battery cells 20 may be housed in the housing 10. Alternatively, the battery 100 may first connect multiple battery cells 20 in series, in parallel, or in a manner that includes both to form a battery module, and then further connect multiple battery modules in series, in parallel, or in a manner that includes both to form an integrated unit, which may be housed in the housing 10.

[0048] Each battery cell 20 may be a secondary battery cell or a primary battery cell, and may be, but is not limited to, a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell. The battery cell 20 may be cylindrical, flattened, rectangular, or have other shapes.

[0049] The flexible printed circuit board assembly 30 is connected to the battery cell 20 and is a component that acquires electrical data such as voltage and temperature of the battery cell 20. The bus bar 40 is a component that enables electrical connection between multiple battery cells 20. In some embodiments of this application, the flexible printed circuit board assembly 30 is electrically connected to the bus bar 40, the bus bar 40 is electrically connected to the battery cell 20, and therefore the flexible printed circuit board assembly 30 is electrically connected to the battery cell 20 via the bus bar 40, that is, the bus bar 40 is electrically connected to both the flexible printed circuit board assembly 30 and the battery cell 20.

[0050] Referring to Figures 4 and 5, Figure 4 is a schematic diagram of a flexible printed circuit board assembly 30 according to some embodiments of the present application. Figure 5 is an enlarged view of area A in Figure 4. The flexible printed circuit board assembly 30 according to some embodiments of the present application comprises a board body 31 and a sampling terminal 32. The sampling terminal 32 is configured to acquire electrical data of a target component. A groove 33 is provided in the board body 31, and the groove 33 penetrates the board body 31 along the thickness direction of the board body 31, thereby dividing the board body 31 into a main body 311, a connecting portion 313, and a deformable portion 312. The connecting portion 313 is the part that connects to the sampling terminal 32. The deformable portion 312 is connected to the main body 311 and the connecting portion 313. The deformable portion 312 is configured to be deformable to allow displacement of the connecting portion 313 relative to the main body 311.

[0051] The main board 31 is the main part of the flexible printed circuit board assembly 30 and can perform operations such as transferring, summarizing, and / or processing the electrical data acquired by the sampling terminal 32.

[0052] The sampling terminal 32 is an element that acquires electrical data of a target component in the flexible printed circuit board assembly 30. The electrical data includes, but is not limited to, data such as the temperature, voltage, or current of the target component.

[0053] The groove 33 is a concave groove that penetrates the main body 31 of the plate along the thickness direction of the main body 31.

[0054] The main body 311 is the main structure of the plate body 31, the connecting portion 313 is the part of the plate body 31 that connects to the sampling terminal 32, and the deformable portion 312 is the part of the plate body 31 between the main body 311 and the connecting portion 313. The deformable portion 312 is configured to be deformable so as to allow displacement of the connecting portion 313 relative to the main body 311. The deformable portion 312 and the connecting portion 313 are each electrically connected to the main body 311, thereby enabling the transmission of acquired electrical data to the main body 311 when the sampling terminal 32 is electrically connected to the connecting portion 313.

[0055] The flexible printed circuit board assembly 30 has a groove 33 that penetrates the board body 31 along the thickness direction of the board body 31, forming a deformable portion 312 and a connecting portion 313 on the board body 31. The connecting portion 313 is connected to the sampling terminal 32, and when the sampling terminal 32 is subjected to an external force, the deformable portion 312 deforms, allowing the sampling terminal 32 to move relative to the main body 311. This prevents damage to the sampling terminal 32 or the board body 31 caused by the sampling terminal 32 being unable to move relative to the board body 31 when subjected to an external force.

[0056] When the battery 100 is used for a certain period of time, expansion displacement occurs in the battery cell 20, which applies an external force to the sampling terminal 32. As a result, the sampling terminal 32 of the flexible printed circuit board assembly 30 according to the embodiment of this application can move in accordance with the expansion of the battery cell 20, so that the flexible printed circuit board assembly 30 does not separate from the battery cell 20, and the voltage and temperature of the battery cell 20 can be continuously acquired.

[0057] The main body 311, connecting portion 313, and deformation portion 312 of the flexible printed circuit board assembly 30 are integrally molded from the main board 31 by press working, making manufacturing simple and relatively efficient.

[0058] In some embodiments of this application, a land is provided on the connecting portion 313, a conductor is built into the deformable portion 312, and the land and the main body portion 311 are electrically connected by the conductor. The sampling terminal 32 is welded to the land, and in this way the sampling terminal 32 is electrically connected to the main body portion 311, and the electrical data acquired by the sampling terminal 32 can be transmitted to the main body portion 311.

[0059] In some embodiments of this application, the plate body 31 has an edge 34. The groove 33 includes a first groove 331 and a second groove 332. The first groove 331 includes a first groove segment 3311, a second groove segment 3312 and a third groove segment 3313 which are connected in order, with one end of the first groove segment 3311 penetrating the edge 34, the second groove segment 3312 extending along the extending direction of the edge 34, and the first groove segment 3311 and the third groove segment 3313 located on the same side relative to the second groove segment 3312. One end of the second groove 332 penetrating the edge 34, and the plate body 31 has a deformed portion 312 formed in the region between the second groove 332 and the third groove segment 3313.

[0060] The edge portion 34 refers to the side edge portion of the main plate body 31. The second groove segment 3312 is a recessed groove in the main plate body 31 whose extending direction is the same as the edge portion 34. The first groove segment 3311 is a recessed groove that penetrates the edge portion 34 and extends to the second groove segment 3312. The third groove segment 3313 is a recessed groove formed to approach the edge portion 34 from the second groove segment 3312. The first groove segment 3311, the second groove segment 3312, and the third groove segment 3313 are in sequential communication.

[0061] The second groove 332 is another recessed groove that penetrates the edge 34, and the second groove 332 is provided isolated from the first groove 331, thereby forming a deformed portion 312 between the second groove 332 and the third groove segment 3313.

[0062] By providing a first groove segment 3311 and a second groove segment 3312 in the main plate body 31, the main body 311 and the connecting part 313 are separated in the main plate body 31. By providing a third groove segment 3313 and a second groove 332 in the main plate body 31, the portion between the connecting part 313 and the main body 311 becomes less strong and more easily deformed, and thus a deformable portion 312 is formed between the main body 311 and the connecting part 313. In this way, when the sampling terminal 32 is subjected to an external force, the external force is transmitted to the connecting part 313, and the deformable portion 312 is pulled and deformed by the connecting part 313. As a result, the sampling terminal 32 becomes movable relative to the main body 311, and damage to the sampling terminal 32 or the main plate body 31 caused by the sampling terminal 32 being immobile relative to the main plate body 31 when subjected to an external force can be prevented.

[0063] In some embodiments of this application, the second groove 332 extends in a direction approaching the second groove segment 3312 from the edge 34, and the third groove segment 3313 extends in a direction approaching the edge 34 from the second groove segment 3312. In the direction of extension of the edge 34, the second groove 332 is located between the third groove segment 3313 and the first groove segment 3311.

[0064] The statement "the second groove 332 extends from the edge 34 toward the second groove segment 3312" means that the second groove 332 may extend from the edge 34 toward the second groove segment 3312 along a direction perpendicular to the direction of extension of the edge 34, or the second groove 332 may extend from the edge 34 toward the second groove segment 3312 along a direction that forms an acute angle with the direction of extension of the edge 34, or the second groove 332 may extend from the edge 34 toward the second groove segment 3312 along a curved trajectory.

[0065] The statement "the third groove segment 3313 extends from the second groove segment 3312 in a direction approaching the edge 34" means that the third groove segment 3313 may extend from the second groove segment 3312 toward the edge 34 along a direction perpendicular to the direction of extension of the edge 34, the third groove segment 3313 may extend from the second groove segment 3312 toward the edge 34 along a direction that forms an acute angle with the direction of extension of the edge 34, or the third groove segment 3313 may extend from the second groove segment 3312 toward the edge 34 along a curved trajectory.

[0066] The second groove 332 extends from the edge 34 toward the second groove segment 3312, and the second groove 332 is closer to the connection portion 313 than the third groove segment 3313. When welding the sampling terminal 32 to the connection portion 313, the heat transferred to the main body portion 311 by the second groove 332 can be reduced, thereby mitigating the thermal impact on the main body portion 311 during welding.

[0067] In some other embodiments of this application, in the extending direction of the edge 34, the third groove segment 3313 is located between the second groove 332 and the first groove segment 3311.

[0068] In some embodiments of this application, both the third groove segment 3313 and the second groove 332 are arc-shaped opening grooves, which improves the tear resistance of the deformed portion 312.

[0069] Referring to Figure 6, which is a schematic diagram of a flexible printed circuit board assembly 30 according to some other embodiments of the present application. The second groove 332 includes a fourth groove segment 3321 and a fifth groove segment 3322 which are connected in sequence, with one end of the fourth groove segment 3321 passing through the edge 34. The fifth groove segment 3322 and the third groove segment 3313 are arranged to wrap around each other, so that the deformable portion 312 extends along a helical trajectory.

[0070] The fourth groove segment 3321 is the portion of the second groove 332 that penetrates the edge 34. The fifth groove segment 3322 is the portion of the second groove 332 that communicates with the fourth groove segment 3321. The deformation portion 312 takes on a helical shape as the fifth groove segment 3322 and the third groove segment 3313 wind around each other.

[0071] As the third groove segment 3313 and the fifth groove segment 3322 wind around each other, the deformable portion 312 extends along a helical trajectory, and the deformable portion 312 extending along a helical trajectory is easily deformed and has a relatively large range of deformation.

[0072] In some embodiments of this application, the amount of deformation of the deformed portion 312 allows for the connecting portion 313 to be displaced beyond the first groove segment 3311 along the extending direction of the edge portion 34.

[0073] "The deformation of the deformable portion 312 is such that the connecting portion 313 is displaced beyond the first groove segment 3311 along the extending direction of the edge portion 34" means that when the deformation of the deformable portion 312 reaches its limit or maximum, the connecting portion 313 exceeds the first groove segment 3311 in the extending direction of the edge portion 34.

[0074] By adjusting the deformation amount of the deformable portion 312 to allow the connecting portion 313 to be displaced beyond the first groove segment 3311 along the extending direction of the edge portion 34, the connecting portion 313 has a sufficient amount of displacement relative to the main body portion 311 to accommodate the expansion displacement of the battery cell 20.

[0075] In some embodiments of this application, the plate body 31 includes a weak portion 35, the weak portion 35 being connected to two opposing groove walls of the first groove segment 3311.

[0076] The connection of the weak portion 35 to the two opposing groove walls of the first groove segment 3311 means that the weak portion 35 is connected to the connecting portion 313 and the main body portion 311. The weak portion 35 has relatively low strength and is prone to fracture when subjected to external force, and the connecting portion 313 is movable relative to the main body portion 311 when the deformable portion 312 is deformed, thereby allowing the sampling terminal 32 to move relative to the main body portion 311 and to accommodate the expansion displacement of the battery cell 20.

[0077] The weak portion 35 is connected to two opposing groove walls of the first groove segment 3311, which contributes to the positioning of the connection portion 313 and the sampling terminal 32 during assembly, and improves the accuracy of the connection between the connection portion 313 and the sampling terminal 32.

[0078] As shown in Figure 6, in some embodiments of this application, the deformation portion 312 includes a first winding segment 3121 and a second winding segment 3122, with one end of the first winding segment 3121 and one end of the second winding segment 3122 connected. The first winding segment 3121 and the second winding segment 3122 are formed to wind in the same direction with their connection point as the winding center. The other end of the first winding segment 3121 is connected to a connecting portion 313, and the other end of the second winding segment 3122 is connected to the main body portion 311.

[0079] The first winding segment 3121 and the second winding segment 3122 both extend along a helical trajectory. Both ends of the first winding segment 3121 are connected to the second winding segment 3122 and the connecting portion 313, respectively, and both ends of the second winding segment 3122 are connected to the first winding segment 3121 and the main body portion 311, respectively.

[0080] The deformable portion 312 is formed as a winding structure by winding the first winding segment 3121 and the second winding segment 3122 in the same direction. This winding structure is easily deformable, has a relatively large deformation range, and can accommodate the expansion displacement of the battery cell 20.

[0081] In some embodiments of this application, the deformed portion 312 extends along an S-shaped trajectory.

[0082] The statement "the deformed portion 312 extends along an S-shaped trajectory" can also be understood as the deformed portion 312 having an S-shape.

[0083] The deformable portion 312, which extends along the S-shaped trajectory, is easily deformable and has relatively good strength.

[0084] In some other embodiments of this application, the deformed portion 312 extends along a helical trajectory.

[0085] The statement "the deformed portion 312 extends along a helical trajectory" can also be understood as the deformed portion 312 being helical in shape.

[0086] The deformable portion 312, which extends along the helical trajectory, is easily deformed and has a relatively large range of deformation.

[0087] In some embodiments of this application, a plate body 31 is provided with a plurality of grooves 33. The plurality of grooves 33 divide the plate body 31 into a main body 311, a plurality of connecting parts 313, and a plurality of deformable parts 312. The connecting parts 313 and the deformable parts 312 are configured to correspond one-to-one. The deformable parts 312 are connected to the main body 311 and the connecting parts 313. By providing a plurality of deformable parts 312 and a plurality of connecting parts 313, a plurality of sampling terminals 32 can be provided to connect a plurality of battery cells 20.

[0088] In some embodiments of this application, with respect to the intermediate position of the main body portion 311, the deformation directions of the multiple deformation portions 312 on both sides of the intermediate position are all directed toward the intermediate position.

[0089] In some embodiments of this application, a battery 100 is further provided. The battery 100 includes a plurality of battery cells 20, a bus bar 40, and the flexible printed circuit board assembly 30 described above. The bus bar 40 is configured to connect the plurality of battery cells 20 in series or in parallel, and the sampling terminal 32 is connected to the bus bar 40.

[0090] The battery cell 20 is the smallest constituent unit of the battery 100. In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a manner that includes both. Connecting in a manner that includes both means that among the multiple battery cells 20, some are connected in series and others are connected in parallel. Multiple battery cells 20 may be directly connected in series, in parallel, or in a manner that includes both, and the integrated unit consisting of multiple battery cells 20 may be housed in the housing 10. Alternatively, the battery 100 may first connect multiple battery cells 20 in series, in parallel, or in a manner that includes both to form a battery module, and then further connect multiple battery modules in series, in parallel, or in a manner that includes both to form an integrated unit, which may be housed in the housing 10. Each battery cell 20 may be a secondary battery cell or a primary battery cell, and may be, but is not limited to, a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell. The battery cell 20 may be cylindrical, flattened, rectangular, or of other shapes.

[0091] The busbar 40 is a component that enables electrical connection between multiple battery cells 20. The flexible printed circuit board assembly 30 is electrically connected to the busbar 40, the busbar 40 is electrically connected to the battery cells 20, and therefore the flexible printed circuit board assembly 30 is electrically connected to the battery cells 20 via the busbar 40, that is, the busbar 40 is electrically connected to both the flexible printed circuit board assembly 30 and the battery cells 20.

[0092] When the flexible printed circuit board assembly 30 is installed on the battery 100, the battery cells 20 expand after the battery 100 has been used for a certain period of time. The sampling terminal 32 can move along with the expansion of the battery cells 20, so the flexible printed circuit board assembly 30 does not separate from the battery cells 20, and the voltage and temperature of the battery cells 20 can be continuously obtained. As a result, the battery 100 has a relatively long lifespan and excellent stability.

[0093] In some embodiments of this application, an electrical device is further provided. The electrical device includes the battery 100 described above, and the battery 100 is configured to supply electrical energy.

[0094] In some embodiments of this application, refer to Figures 4 and 5.

[0095] The flexible printed circuit board assembly 30 comprises a board body 31 and a sampling terminal 32, the sampling terminal 32 being configured to acquire electrical data of a target component. A groove 33 is provided in the board body 31, the groove 33 penetrates the board body 31 along the thickness direction of the board body 31, thereby dividing the board body 31 into a main body 311, a connecting portion 313, and a deformable portion 312. The connecting portion 313 is the part that connects to the sampling terminal 32. The deformable portion 312 is connected to the main body 311 and the connecting portion 313. The deformable portion 312 is configured to be deformable to allow displacement of the connecting portion 313 relative to the main body 311. The board body 31 has an edge portion 34. The groove 33 includes a first groove 331 and a second groove 332. The first groove 331 includes a first groove segment 3311, a second groove segment 3312, and a third groove segment 3313 that are connected in order, with one end of the first groove segment 3311 penetrating the edge 34, the second groove segment 3312 extending along the direction of extension of the edge 34, and the first groove segment 3311 and the third groove segment 3313 located on the same side with respect to the second groove segment 3312. One end of the second groove 332 penetrates the edge 34, and the plate body 31 has a deformed portion 312 formed in the region between the second groove 332 and the third groove segment 3313. The second groove 332 extends in a direction approaching the second groove segment 3312 from the edge 34, and the third groove segment 3313 extends in a direction approaching the edge 34 from the second groove segment 3312. In the direction of extension of the edge portion 34, the second groove 332 is located between the third groove segment 3313 and the first groove segment 3311.

[0096] The flexible printed circuit board assembly 30 has a groove 33 that penetrates the board body 31 along the thickness direction of the board body 31, forming a deformable portion 312 and a connecting portion 313 on the board body 31. The connecting portion 313 is connected to the sampling terminal 32, and when the sampling terminal 32 is subjected to an external force, the deformable portion 312 deforms, allowing the sampling terminal 32 to move relative to the main body 311. This prevents damage to the sampling terminal 32 or the board body 31 caused by the sampling terminal 32 being unable to move relative to the board body 31 when subjected to an external force. When the battery 100 is used for a certain period of time, expansion displacement occurs in the battery cell 20, which applies an external force to the sampling terminal 32. As a result, the sampling terminal 32 of the flexible printed circuit board assembly 30 according to the embodiment of this application can move in accordance with the expansion of the battery cell 20, so that the flexible printed circuit board assembly 30 does not separate from the battery cell 20, and the voltage and temperature of the battery cell 20 can be continuously obtained. The main body 311, connecting portion 313, and deformable portion 312 of the flexible printed circuit board assembly 30 are integrally molded from the board body 31 by press working, making manufacturing simple and relatively efficient. By providing the first groove segment 3311 and the second groove segment 3312 in the board body 31, the main body 311 and the connecting portion 313 are separated in the board body 31. By providing the third groove segment 3313 and the second groove 332 in the board body 31, the portion between the connecting portion 313 and the main body 311 becomes less strong and more easily deformed, and thus the deformable portion 312 is formed between the main body 311 and the connecting portion 313. In this way, when the sampling terminal 32 is subjected to an external force, the external force is transmitted to the connecting portion 313, and the deformable portion 312 is pulled and deformed by the connecting portion 313. This makes the sampling terminal 32 movable relative to the main body portion 311, and prevents damage to the sampling terminal 32 or the main body 31 that would occur if the sampling terminal 32 were immobile relative to the main body 31 when subjected to an external force. The second groove 332 extends from the edge portion 34 toward the second groove segment 3312, and the second groove 332 is closer to the connecting portion 313 than the third groove segment 3313.When welding the sampling terminal 32 to the connection part 313, the second groove 332 reduces the heat transferred to the main body part 311, thereby mitigating the thermal impact on the main body part 311 during welding.

[0097] Refer to Figure 6 in some other embodiments of this application.

[0098] The second groove 332 includes the sequentially connected fourth groove segment 3321 and fifth groove segment 3322, with one end of the fourth groove segment 3321 penetrating the edge 34. The fifth groove segment 3322 and the third groove segment 3313 are arranged to wind around each other, thereby causing the deformable portion 312 to extend along a helical trajectory. The winding of the third groove segment 3313 and the fifth groove segment 3322 causes the deformable portion 312 to extend along a helical trajectory, and the deformable portion 312 extending along a helical trajectory is easily deformed and has a relatively large range of deformation. The main plate body 31 includes a weak portion 35, which is connected to two opposing groove walls of the first groove segment 3311. The weak portion 35 is connected to two opposing groove walls of the first groove segment 3311, which contributes to the positioning of the connection portion 313 and the sampling terminal 32 during assembly, and improves the accuracy of the connection between the connection portion 313 and the sampling terminal 32.

[0099] The foregoing describes only preferred embodiments of this application and does not limit it. Those skilled in the art may have various modifications and changes to this application. Any modifications, equivalent substitutions, or improvements made, as long as they do not deviate from the spirit and principles, are within the scope of protection of this application. [Explanation of Symbols]

[0100] 100 batteries 10 cabinets 11 Part 1 12 Part 2 20 battery cells 30 Flexible Printed Circuit Board Assemblies 31 Board main body 311 Main body 312 Deformed part 3121 Volume 1 Segment 3122 Volume 2 Segment 313 Connection part 32 sampling terminals 33 Groove 331 First groove 3311 First groove segment 3312 Second groove segment 3313 Third groove segment 332 2nd groove 3321 Fourth groove segment 3322 Fifth groove segment 34 Edge 35 Vulnerable parts 40 Bus Bar 200 Control device 300 engine 1000 vehicles

Claims

1. It comprises a main board and a sampling terminal, The sampling terminal is configured to acquire electrical data of the target component. The plate body is provided with grooves, which penetrate the plate body along the thickness direction, thereby dividing the plate body into a main body, a connecting part, and a deformed part. The aforementioned connection part is the part that is connected to the sampling terminal, The deformable portion is connected to the main body and the connecting portion, and the deformable portion is configured to be deformable so as to allow displacement of the connecting portion relative to the main body. The main body of the plate has an edge, The groove portion includes a first groove and a second groove, The first groove includes a first groove segment, a second groove segment, and a third groove segment that are connected in order, with one end of the first groove segment penetrating the edge, the second groove segment extending along the direction of extension of the edge, and the first groove segment and the third groove segment located on the same side relative to the second groove segment. One end of the second groove penetrates the edge, and the plate body has the deformed portion formed in the region between the second groove and the third groove segment. The second groove includes sequentially connected fourth and fifth groove segments, one end of the fourth groove segment passing through the edge, and the fifth groove segment and the third groove segment are arranged to wrap around each other, thereby causing the deformed portion to extend along a helical trajectory. Flexible printed circuit board assembly.

2. The second groove extends in a direction approaching the second groove segment from the edge, the third groove segment extends in a direction approaching the edge, and in the direction of extension of the edge, the second groove is located between the third groove segment and the first groove segment. The flexible printed circuit board assembly according to claim 1.

3. The second groove extends along the curved trajectory from the edge toward the second groove segment. The flexible printed circuit board assembly according to claim 1.

4. The third groove segment extends from the second groove segment toward the edge along a curved trajectory. The flexible printed circuit board assembly according to claim 1.

5. The second groove is closer to the connection portion than the third groove segment. The flexible printed circuit board assembly according to claim 1.

6. At least a portion of the second groove is located between the third groove segment and the connecting portion. The flexible printed circuit board assembly according to claim 2.

7. The amount of deformation of the deformed portion is such that the connecting portion is displaced to an extent that exceeds the first groove segment along the extending direction of the edge portion. A flexible printed circuit board assembly according to any one of claims 1 to 6.

8. The plate body includes a weak portion, and the weak portion is connected to two opposing groove walls of the first groove segment. A flexible printed circuit board assembly according to any one of claims 1 to 6.

9. The deformed portion includes a first winding segment and a second winding segment, with one end of the first winding segment and one end of the second winding segment connected, and the first winding segment and the second winding segment are formed to wind in the same direction with their connection point as the winding center. The other end of the first winding segment is connected to the connecting portion, and the other end of the second winding segment is connected to the main body portion. A flexible printed circuit board assembly according to any one of claims 1 to 6.

10. The deformed portion extends along an S-shaped trajectory. A flexible printed circuit board assembly according to any one of claims 1 to 5.

11. The deformed portion extends along a helical trajectory. The flexible printed circuit board assembly according to claim 1.

12. The assembly comprises a plurality of battery cells, a busbar, and a flexible printed circuit board assembly according to any one of claims 1 to 6. The busbar is configured to connect the plurality of battery cells in series or in parallel. The sampling terminal is connected to the busbar. battery.

13. A battery according to claim 12, wherein the battery is configured to supply electrical energy, Electrical device.

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