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]

[0001] The present application is in the field of batteries, and specifically relates to flexible printed circuit board assemblies, batteries and electrical devices.

[0002] (CROSS REFERENCE TO RELATED APPLICATIONS) This application claims priority to a Chinese application filed on January 27, 2022, entitled "Flexible Printed Circuit Board Assembly, Battery and Electrical Device" and bearing application number 202220231816.5, the entire contents of which are incorporated herein by reference. [Background technology]

[0003] Batteries are widely applied in the field of new energy, including electric vehicles and new energy vehicles, and new energy vehicles and electric vehicles have become a new development direction of the automobile industry. In order to easily manage the battery, it is necessary to acquire the voltage and temperature of each battery cell in the battery. In the prior art, the voltage and temperature of the battery cell are generally acquired by connecting a flexible printed circuit board to each battery cell. However, after a certain period of use of the battery, the flexible printed circuit board comes off the battery cell, making it impossible to acquire the voltage and temperature of the battery cell. Summary of the Invention [Problem to be solved by the invention]

[0004] An object of the embodiments of the present application is to provide a flexible printed circuit board assembly, a battery, and an electric device that can improve the problem in the prior art that the flexible printed circuit board becomes detached from the battery cell after the battery is used for a certain period of time. [Means for solving the problem]

[0005] In a first aspect, an embodiment of the present application provides a flexible printed circuit board assembly, the flexible printed circuit board assembly comprising a plate main body and a sampling terminal, the sampling terminal configured to acquire electrical data of a target member, a groove portion provided in the plate main body, the groove portion penetrating the plate main body along a thickness direction of the plate main body, whereby the groove portion divides the plate main body into a main body portion, a connection portion and a deformation portion, the connection portion being a portion connected to the sampling terminal, the deformation portion being connected to the main body portion and the connection portion, and the deformation portion being configured to be deformable to allow displacement of the connection portion relative to the main body portion.

[0006] In the above technical solution, the flexible printed circuit board assembly has a groove penetrating the plate main body in the thickness direction of the plate main body, a deformation part and a connection part are formed on the plate main body, the connection part is connected to a sampling terminal, and when the sampling terminal is subjected to an external force, the deformation part is deformed, so that the sampling terminal can move relative to the body part, thereby preventing damage to the sampling terminal or the plate main body caused by the sampling terminal being unable to move relative to the plate main body when the external force is applied. When a battery is used for a certain period of time, an expansion displacement occurs in the battery cell, so that an external force is applied to the sampling terminal, and the sampling terminal of the flexible printed circuit board assembly according to the embodiment of the present application can move according to the expansion of the battery cell, so that the flexible printed circuit board assembly does not separate from the battery cell, and the voltage and temperature of the battery cell can be continuously obtained. The body part, the connection part and the deformation part of the flexible printed circuit board assembly are integrally formed by pressing the plate main body, which is simple to manufacture and relatively efficient.

[0007] As an optional technical solution of an embodiment of the present application, the plate main body has an edge portion, 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 which are connected in sequence, one end of the first groove segment penetrates the edge portion, the second groove segment extends along the extension direction of the edge portion, the first groove segment and the third groove segment are located on the same side of the second groove segment, one end of the second groove penetrates the edge portion, and the plate main body has the deformation portion formed in a region between the second groove and the third groove segment.

[0008] In the above technical proposal, the plate main body is divided into a main body and a connection part by providing the first groove segment and the second groove segment in the plate main body. The plate main body is divided into a main body and a connection part by providing the third groove segment and the second groove in the plate main body, so that the strength of the part between the connection part and the main body is reduced and the part is easily deformed, and therefore a deformed part is formed between the main body and the connection part. In this way, when the sampling terminal is subjected to an external force, the external force is transmitted to the connection part, and the connection part pulls and deforms the deformed part, so that the sampling terminal can move relative to the main body, and damage to the sampling terminal or the plate main body caused by the sampling terminal being unable to move relative to the plate main body when the sampling terminal is subjected to an external force can be prevented.

[0009] As an optional technical proposal of an embodiment of the present application, the second groove extends from the edge in a direction approaching the second groove segment, the third groove segment extends from the second groove segment in a direction approaching the edge, and the second groove is located between the third groove segment and the first groove segment in the extension direction of the edge.

[0010] In the above technical solution, the second groove extends from the edge toward the second groove segment, and the second groove is closer to the connection portion than the third groove segment. When the sampling terminal is welded to the connection portion, the second groove can reduce the heat transferred to the body portion, thereby reducing the thermal impact on the body portion during welding.

[0011] As an optional technical solution of the embodiment of the present application, the second groove includes a fourth groove segment and a fifth groove segment connected in sequence, one end of the fourth groove segment penetrates the edge portion, and the fifth groove segment and the third groove segment are arranged to wind around each other, so that the deformation portion extends along a spiral trajectory.

[0012] In the above technical solution, the third groove segment and the fifth groove segment are wound around each other, so that the deformation portion extends along a spiral trajectory, and the deformation portion extending along the spiral trajectory is easy to deform and has a relatively large deformation range.

[0013] As an optional technical solution of the embodiment of the present application, the deformation amount of the deformation portion is allowed to be such that the connection portion is displaced beyond the first groove segment along the extension direction of the edge portion.

[0014] In the above technical proposal, the deformation amount of the deformation portion is allowed to be such that the connection portion is displaced beyond the first groove segment along the extension direction of the edge portion, so that the connection portion has a sufficient displacement amount relative to the main body portion to accommodate the expansion and displacement amount of the battery cell.

[0015] As an optional technical solution of the embodiment of the present application, the plate main body includes a weakened portion, and the weakened portion is connected to two opposing groove walls of the first groove segment.

[0016] In the above technical proposal, the weak portion is connected to two opposing groove walls of the first groove segment, which contributes to positioning the connection portion and the sampling terminal during assembly and improves the accuracy of the connection between the connection portion and the sampling terminal.

[0017] As one optional technical proposal for an embodiment of the present application, the deformation portion includes a first winding segment and a second winding segment, one end of the first winding segment is connected to one end of the second winding segment, the first winding segment and the second winding segment are formed to be wound in the same direction with their connection position 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 technical proposal, the deformation portion is formed as a winding structure by winding the first winding segment and the second winding segment in the same direction, and the winding structure is easy to deform and has a relatively large deformation range, so that it can accommodate the expansion and displacement of the battery cell.

[0019] In one alternative technical solution of the embodiment of the present application, the deformation portion extends along an S-shaped locus.

[0020] In the above technical solution, the deformation portion extending along the S-shaped locus is easy to deform and has relatively good strength.

[0021] In one alternative technical solution of the embodiment of the present application, the deformation portion extends along a helical trajectory.

[0022] In the above technical solution, the deformation portion extending along the spiral trajectory is easy to deform and has a relatively large deformation range.

[0023] In a second aspect, an embodiment of the present application further provides a battery, the battery including a plurality of battery cells, a bus bar, and the flexible printed circuit board assembly described above, the bus bar configured to connect the plurality of battery cells in series or in parallel, and the sampling terminal connected to the bus bar.

[0024] In a third aspect, an embodiment of the present application further provides an electric device, the electric device including the battery described above, the battery configured to supply electric energy. [Brief description of the drawings]

[0025] In order to more clearly describe the technical solutions of the embodiments of the present application, the drawings necessary for describing the embodiments are briefly described below. The drawings described are only for illustrating some embodiments of the present application, and are not intended to limit the scope. Those skilled in the art can obtain other related drawings based on these drawings without using inventive abilities. [Figure 1] FIG. 1 is a schematic diagram of a vehicle according to some embodiments of the present application. [Diagram 2] FIG. 2 is an exploded view of a battery according to some embodiments of the present application. [Diagram 3] 1 is a schematic diagram showing a connection between a flexible printed circuit board assembly and a bus bar according to some embodiments of the present application. [Figure 4] 1 is a schematic diagram of a flexible printed circuit board assembly according to some embodiments of the present application. [Diagram 5] FIG. 5 is an enlarged view of a portion A in FIG. [Figure 6] 1A to 1C are schematic diagrams of flexible printed circuit board assemblies according to some other embodiments of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] Hereinafter, the embodiments of the technical solution of the present application will be described in detail with reference to the drawings. The following embodiments are merely illustrative for more clearly illustrating the technical solution of the present application, and are not intended to limit the scope of protection of the present application.

[0027] Unless otherwise specified, all technical and scientific terms used in this application have the meanings that are commonly understood by those skilled in the art. The terms used in this application are only for describing specific examples and are not intended to limit the present application. The terms "include", "have" and any variations thereof in the description of the specification, claims and above drawings of this application mean inclusive and non-exclusive.

[0028] In the description of the embodiments of the present application, technical terms such as "first", "second", etc. are merely used to distinguish different elements, and do not express or imply relative importance, imply the number of technical features, or stipulate a particular order or primary and secondary. In the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

[0029] In this application, the term "embodiment" means that a particular feature, configuration, or characteristic described using the embodiment is included in at least one embodiment of this application. The use of this term in various parts of the specification does not necessarily refer to the same embodiment, nor is it intended to limit independent or alternative embodiments that are mutually exclusive with other embodiments. Those skilled in the art can understand that the embodiment described in this application may be combined with other embodiments.

[0030] In the description of the embodiments of the present application, the term "and / or" is merely used to describe the relationship between related objects and represents three types of relationships, for example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the symbol " / " in the present application generally represents the relationship indicated by "or" between the related objects before and after it.

[0031] In describing the embodiments of the present application, the term "plurality" 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 describing the embodiments of the present application, directions or positional relationships expressed by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction", "radial direction", "circumferential direction", etc. are based on the drawings and are merely intended to simply and concisely describe the embodiments of the present application, and are not intended to expressly or imply that a device or part necessarily has a specific direction, or is configured or operated in a specific direction, and therefore are not intended to limit the embodiments of the present application.

[0033] In the description of the embodiments of the present application, unless otherwise specified, technical terms such as "attached", "coupled", "connected", and "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a removable connection, or an integral connection. It may also be a mechanical connection, an electrical connection, a direct connection, or an indirect connection via an intermediate object, or the interiors of two parts may communicate with each other or the two parts may interact with each other. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present application according to the specific situation.

[0034] At present, from the perspective of market development, the application of batteries is becoming more and more widespread. Batteries are not only used in energy storage power systems such as hydroelectric power stations, thermal power stations, wind power stations, and solar power stations, but also in electric transportation such as electric bicycles, electric motorcycles, and electric cars, military equipment, aerospace, and other fields. With the expansion of battery applications, market demand is also increasing.

[0035] In order to contribute to battery management, it is necessary to obtain the voltage and temperature of each battery cell in the battery. In the conventional technology, the voltage and temperature of the battery cell are generally obtained by connecting a flexible printed circuit board to each battery cell. However, after a certain period of use of the battery, the flexible printed circuit board becomes detached from the battery cell, and the voltage and temperature of the battery cell cannot be obtained.

[0036] During the charging and discharging process of the battery cell, the volume of the battery cell changes due to a chemical reaction, which causes relative stress at the connection between the flexible printed circuit board and the battery cell. As the battery is used for a long time, a relatively large expansion displacement occurs in the battery cell, and when it expands to a certain extent, the sampling connection part of the flexible printed circuit board will tear or come off, making it impossible to obtain the voltage and temperature of the battery cell.

[0037] In view of the above, the inventors have conducted research and designed a flexible printed circuit board assembly, which has a groove portion penetrating the plate main body in the thickness direction of the plate main body, a deformation portion and a connection portion formed in the plate main body, the connection portion being connected to a sampling terminal, and when the sampling terminal is subjected to an external force, the deformation portion deforms, thereby allowing the sampling terminal to move relative to the main body, thereby preventing damage to the sampling terminal or the plate main body caused by the sampling terminal being unable to move relative to the plate main body when subjected to an external force.

[0038] When a battery is used for a certain period of time, an expansion displacement occurs in the battery cell, and an external force is applied to the sampling terminal. Since the sampling terminal of the flexible printed circuit board assembly according to an embodiment of the present application can move in accordance with the expansion of the battery cell, the flexible printed circuit board assembly does not separate from the battery cell, and the voltage and temperature of the battery cell can be continuously obtained.

[0039] The body, connection and deformation parts of the flexible printed circuit board assembly are integrally formed by pressing the main plate, which makes the manufacturing process simple and relatively efficient.

[0040] The flexible printed circuit board assembly according to the embodiment of the present application can be used in a secondary battery or a primary battery, which may be, but is not limited to, a lithium-sulfur battery, a sodium ion battery, or a magnesium ion battery. A battery including the flexible printed circuit board according to the present application can be used in a power supply system of an electric device, thereby improving the stability of the battery performance and the battery life.

[0041] The embodiment of the present application provides an electric device that uses a battery as a power source. The electric device includes, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, an electric car, an electric vehicle, a boat, an aircraft, etc. The electric toy can be stationary or mobile, and includes, for example, a game console, an electric car toy, an electric boat toy, and an electric airplane toy. The aircraft can include, for example, an airplane, a rocket, a space shuttle, and a spaceship.

[0042] For convenience of explanation, in the following embodiment, a vehicle 1000 is taken as an example to describe an electrical device according to an embodiment of the present application.

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

[0044] The vehicle 1000 may be a fuel 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-extended electric vehicle, etc. A battery 100 is disposed inside the vehicle 1000, and the battery 100 is disposed at the bottom, front or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000, for example, as a power source for driving the vehicle 1000. The vehicle 1000 further includes a control device 200 and an engine 300, and the control device 200 controls the power supply from the battery 100 to the engine 300, for example, used for starting the vehicle 1000, navigation and supplying work electricity during driving.

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

[0046] 2 and 3, FIG. 2 is an exploded view of a battery 100 according to some embodiments of the present application. FIG. 3 is a schematic diagram showing a connection between a flexible printed circuit board assembly 30 and a bus bar 40 according to some embodiments of the present application. The battery 100 includes a housing 10, a battery cell 20, the flexible printed circuit board assembly 30, and the bus bar 40, and the battery cell 20 is accommodated in the housing 10. The housing 10 provides an accommodation space for the battery cell 20 and may use various configurations. In some embodiments, the housing 10 includes a first portion 11 and a second portion 12, and the first portion 11 and the second portion 12 together define an accommodation space for accommodating the battery cell 20. The second part 12 may have a hollow structure with one end open, and the first part 11 may have a plate-like structure and the first part 11 may be provided so as to cover the open side of the second part 12, so that the first part 11 and the second part 12 define an accommodation space, or the first part 11 and the second part 12 may both have a hollow structure with one end open, and the open side of the first part 11 may be provided so as 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 may have various shapes, such as a cylinder or a rectangle.

[0047] The battery cell 20 is the smallest structural unit of the battery 100. The battery 100 may have a plurality of battery cells 20, and the plurality of battery cells 20 may be connected in series, in parallel, or in a manner including both. The term "connected in a manner including both" refers to the fact that some of the plurality of battery cells 20 are connected in series and some are connected in parallel. The plurality of battery cells 20 may be directly connected in series or in parallel, or in a manner including both, and an integrated unit of the plurality of battery cells 20 may be housed in the housing 10. The battery 100 may be formed by first connecting the plurality of battery cells 20 in series or in parallel, or in a manner including both, to form a battery module, and then further connecting the plurality of battery modules in series or in parallel, or in a manner including both, to form an integrated unit, and then 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 cells 20 may be cylindrical, flat, rectangular, or of other shapes.

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

[0050] Referring to FIG. 4 and FIG. 5, FIG. 4 is a schematic diagram of a flexible printed circuit board assembly 30 according to some embodiments of the present application. FIG. 5 is an enlarged view of a portion A in FIG. 4. The flexible printed circuit board assembly 30 according to some embodiments of the present application includes a plate main body 31 and a sampling terminal 32. The sampling terminal 32 is configured to acquire electrical data of a target member. A groove portion 33 is provided in the plate main body 31, and the groove portion 33 penetrates the plate main body 31 along the thickness direction of the plate main body 31, thereby dividing the plate main body 31 into a main body portion 311, a connecting portion 313, and a deforming portion 312 by the groove portion 33. The connecting portion 313 is a portion that connects with the sampling terminal 32. The deforming portion 312 is connected with the main body portion 311 and the connecting portion 313. The deforming portion 312 is configured to be deformable so as to allow the connecting portion 313 to be displaced relative to the main body portion 311.

[0051] The board main body 31 is the main part of the flexible printed circuit board assembly 30, and can perform operations such as transferring, consolidating, and / or processing electrical data acquired by the sampling terminals 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 portion 33 is a recessed groove that penetrates the main plate body 31 along the thickness direction of the main plate body 31.

[0054] The main body 311 is a main structure of the plate main body 31, the connection portion 313 is a portion of the plate main body 31 that connects with the sampling terminal 32, and the deformation portion 312 is a portion of the plate main body 31 between the main body 311 and the connection portion 313. The deformation portion 312 is configured to be deformable so as to enable displacement of the connection portion 313 relative to the main body 311. The deformation portion 312 and the connection portion 313 are each electrically connected to the main body 311, and thus, when the sampling terminal 32 is electrically connected to the connection portion 313, acquired electrical data can be transmitted to the main body 311.

[0055] In the flexible printed circuit board assembly 30, a deformation portion 312 and a connection portion 313 are formed in the plate main body 31 by a groove portion 33 penetrating the plate main body 31 along the thickness direction of the plate main body 31. The connection portion 313 is connected to the sampling terminal 32, and when the sampling terminal 32 is subjected to an external force, the deformation portion 312 deforms, allowing the sampling terminal 32 to move relative to the body portion 311. This makes it possible to prevent damage to the sampling terminal 32 or the plate main body 31 caused by the sampling terminal 32 being unable to move relative to the plate main body 31 when the sampling terminal 32 is subjected to an external force.

[0056] When the battery 100 is used for a certain period of time, an expansion displacement occurs in the battery cell 20, and an external force is applied to the sampling terminal 32. Since the sampling terminal 32 of the flexible printed circuit board assembly 30 according to an embodiment of the present application can move in accordance with the expansion of the battery cell 20, 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.

[0057] The body portion 311, the connection portion 313 and the deformation portion 312 of the flexible printed circuit board assembly 30 are integrally formed by pressing the plate main body 31, which makes the manufacturing process simple and relatively efficient.

[0058] In some embodiments of the present application, a land is provided on the connection portion 313, a conductor is built into the deformation portion 312, and the conductor electrically connects the land and the main body portion 311. The sampling terminal 32 is welded to the land, and thus the sampling terminal 32 is electrically connected to the main body portion 311, and electrical data acquired by the sampling terminal 32 can be transmitted to the main body portion 311.

[0059] In some embodiments of the present application, the plate main body 31 has an edge 34. The groove portion 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, one end of the first groove segment 3311 penetrates the edge 34, the second groove segment 3312 extends along the extension direction of the edge 34, and the first groove segment 3311 and the third groove segment 3313 are located on the same side as the second groove segment 3312. One end of the second groove 332 penetrates the edge 34, and the plate main 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 34 refers to a side edge portion of the plate main body 31. The second groove segment 3312 is a groove in the plate main body 31 extending in the same direction as the edge 34. The first groove segment 3311 is a groove penetrating the edge 34 and extending to the second groove segment 3312. The third groove segment 3313 is a groove formed so as to approach the edge 34 from the second groove segment 3312. The first groove segment 3311, the second groove segment 3312, and the third groove segment 3313 are sequentially connected to each other.

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

[0062] By providing the first groove segment 3311 and the second groove segment 3312 in the plate main body 31, the main body 311 and the connection portion 313 are separated in the plate main body 31. By providing the third groove segment 3313 and the second groove 332 in the plate main body 31, the portion between the connection portion 313 and the main body 311 becomes weaker and more likely to deform, and therefore a deformation portion 312 is formed between the main body 311 and the connection portion 313. In this way, when the sampling terminal 32 receives an external force, the external force is transmitted to the connection portion 313, and the deformation portion 312 is pulled and deformed by the connection portion 313, so that the sampling terminal 32 can move relative to the main body 311, and damage to the sampling terminal 32 or the plate main body 31 caused by the sampling terminal 32 being unable to move relative to the plate main body 31 when it receives an external force can be prevented.

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

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

[0065] "The third groove segment 3313 extends from the second groove segment 3312 in a direction approaching the edge 34" may mean that the third groove segment 3313 extends from the second groove segment 3312 toward the edge 34 along a direction perpendicular to the extension direction 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 extension direction 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 the sampling terminal 32 is welded to the connection portion 313, the second groove 332 reduces heat transferred to the main body portion 311, thereby reducing the effect of heat on the main body portion 311 during welding.

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

[0068] In some embodiments of the present application, the third groove segment 3313 and the second groove 332 are both arc-shaped open grooves, which can improve the tear resistance of the deformation portion 312 .

[0069] 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 connected in sequence, and one end of the fourth groove segment 3321 penetrates the edge portion 34. The fifth groove segment 3322 and the third groove segment 3313 are arranged to be wound around each other, so that the deformation portion 312 extends along a spiral trajectory.

[0070] The fourth groove segment 3321 is a portion of the second groove 332 that penetrates the edge portion 34. The fifth groove segment 3322 is a portion of the second groove 332 that communicates with the fourth groove segment 3321. The fifth groove segment 3322 and the third groove segment 3313 are wound around each other, causing the deformation portion 312 to assume a spiral shape.

[0071] The third groove segment 3313 and the fifth groove segment 3322 are wound around each other, so that the deformed portion 312 extends along a spiral trajectory. The deformed portion 312 extending along a spiral trajectory is easy to deform and has a relatively large deformation range.

[0072] In some embodiments of the present application, the deformation amount of the deformation portion 312 is such that the connection portion 313 is allowed to displace beyond the first groove segment 3311 along the extension direction of the edge portion 34 .

[0073] "The deformation amount of the deformation portion 312 is allowed to cause the connection portion 313 to displace beyond the first groove segment 3311 along the extension direction of the edge portion 34" means that when the deformation of the deformation portion 312 reaches its limit or maximum, the connection portion 313 exceeds the first groove segment 3311 in the extension direction of the edge portion 34.

[0074] By allowing the deformation amount of the deformation portion 312 to be such that the connection portion 313 is displaced beyond the first groove segment 3311 along the extension direction of the edge portion 34, the connection portion 313 has a sufficient displacement amount relative to the main body portion 311 to accommodate the expansion and displacement amount of the battery cell 20.

[0075] In some embodiments of the present application, the plate main body 31 includes a weakened portion 35 , which is connected to two opposing groove walls of the first groove segment 3311 .

[0076] The weak portion 35 being connected to the two opposing groove walls of the first groove segment 3311 means that the weak portion 35 is connected to the connection portion 313 and the main body portion 311. The weak portion 35 has a relatively small strength and is easily broken when subjected to an external force, and when the deformation portion 312 is deformed, the connection portion 313 is movable relative to the main body portion 311. This allows the sampling terminal 32 to move relative to the main body portion 311 and to accommodate the expansion and displacement of the battery cell 20.

[0077] By connecting the weak portion 35 to the two opposing groove walls of the first groove segment 3311, this contributes to positioning 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] 6, in some embodiments of the present application, the deformation portion 312 includes a first winding segment 3121 and a second winding segment 3122, and one end of the first winding segment 3121 is connected to one end of the second winding segment 3122. The first winding segment 3121 and the second winding segment 3122 are formed to be wound in the same direction with the connection position as the winding center. The other end of the first winding segment 3121 is connected to the connection portion 313, and the other end of the second winding segment 3122 is connected to the main body portion 311.

[0079] Both the first winding segment 3121 and the second winding segment 3122 extend along a spiral 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 deformation 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, and the winding structure is easily deformed and has a relatively large deformation range, so that it can accommodate the expansion and displacement of the battery cell 20.

[0081] In some embodiments of the present application, the deformation 312 extends along an S-shaped locus.

[0082] "The deformation portion 312 extends along an S-shaped locus" may be understood to mean that the deformation portion 312 has an S-shape.

[0083] The deformed portion 312 extending along the S-shaped locus is easily deformed and has relatively good strength.

[0084] In some other embodiments of the present application, the deformation 312 extends along a helical trajectory.

[0085] "The deformation 312 extends along a spiral trajectory" may be understood to mean that the deformation 312 forms a spiral shape.

[0086] The deformed portion 312 extending along a spiral trajectory is easy to deform and has a relatively large deformation range.

[0087] In some embodiments of the present application, a plurality of grooves 33 are provided in the main plate portion 31. The grooves 33 divide the main plate portion 31 into a main body portion 311, a plurality of connection portions 313, and a plurality of deformation portions 312. The connection portions 313 and the deformation portions 312 are configured to correspond one-to-one. The deformation portions 312 are connected to the main body portion 311 and the connection portions 313. By providing the plurality of deformation portions 312 and the plurality of connection portions 313, a plurality of sampling terminals 32 can be provided to connect a plurality of battery cells 20.

[0088] In some embodiments of the present application, the central position of the main body portion 311 is used as a reference, and the deformation directions of the multiple deformation portions 312 on both sides of the central position all point toward the central position.

[0089] Some embodiments of the present application further provide a battery 100. The battery 100 includes a plurality of battery cells 20, a bus bar 40, and the above-described flexible printed circuit board assembly 30. 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 structural unit of the battery 100. The battery 100 may have a plurality of battery cells 20, and the plurality of battery cells 20 may be connected in series, in parallel, or in a manner including both. The term "connected in a manner including both" refers to the fact that some of the plurality of battery cells 20 are connected in series and some are connected in parallel. The plurality of battery cells 20 may be directly connected in series or in parallel, or in a manner including both, and an integrated assembly of the plurality of battery cells 20 may be housed in the housing 10. The battery 100 may be formed by first connecting the plurality of battery cells 20 in series or in parallel, or in a manner including both, to form a battery module, and then further connecting the plurality of battery modules in series or in parallel, or in a manner including both, to form an integrated assembly, and 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 cells 20 may be cylindrical, flat, rectangular, or of other shape.

[0091] The bus bar 40 is a component for achieving electrical connection between multiple battery cells 20. The flexible printed circuit board assembly 30 is electrically connected to the bus bar 40, and the bus bar 40 is electrically connected to the battery cells 20. Thus, the flexible printed circuit board assembly 30 is electrically connected to the battery cells 20 via the bus bar 40; in other words, the bus bar 40 is electrically connected to the flexible printed circuit board assembly 30 and the battery cells 20.

[0092] When the flexible printed circuit board assembly 30 is installed in the battery 100, after the battery 100 is used for a certain period of time, the battery cell 20 expands and the sampling terminal 32 can move along with the expansion of the battery cell 20. As a result, 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. As a result, the battery 100 has a relatively long life and excellent stability.

[0093] In some embodiments of the present application, there is further provided an electrical device, the electrical device including the battery 100 described above, the battery 100 being configured to provide electrical energy.

[0094] In some examples of the present application, reference is made to FIGS.

[0095] The flexible printed circuit board assembly 30 includes a plate main body 31 and a sampling terminal 32. The sampling terminal 32 is configured to acquire electrical data of a target member. The plate main body 31 is provided with a groove 33, which penetrates the plate main body 31 along the thickness direction of the plate main body 31. This divides the plate main body 31 into a main body portion 311, a connecting portion 313, and a deformation portion 312. The connecting portion 313 is a portion that connects with the sampling terminal 32. The deformation portion 312 is connected with the main body portion 311 and the connecting portion 313. The deformation portion 312 is configured to be deformable so as to allow displacement of the connecting portion 313 relative to the main body portion 311. The plate main body 31 has an edge portion 34. The groove portion 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 connected in order, one end of the first groove segment 3311 penetrates the edge 34, the second groove segment 3312 extends along the extension direction of the edge 34, and the first groove segment 3311 and the third groove segment 3313 are located on the same side of the second groove segment 3312. One end of the second groove 332 penetrates the edge 34, and the plate main 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 from the edge 34 in a direction approaching the second groove segment 3312, and the third groove segment 3313 extends from the second groove segment 3312 in a direction approaching the edge 34. In the extension direction of the edge portion 34 , the second groove 332 is located between the third groove segment 3313 and the first groove segment 3311 .

[0096] In the flexible printed circuit board assembly 30, a deformation portion 312 and a connection portion 313 are formed in the plate main body 31 by a groove portion 33 penetrating the plate main body 31 along the thickness direction of the plate main body 31. The connection portion 313 is connected to the sampling terminal 32, and when the sampling terminal 32 receives an external force, the deformation portion 312 deforms, allowing the sampling terminal 32 to move relative to the body portion 311, thereby preventing damage to the sampling terminal 32 or the plate main body 31 caused by the sampling terminal 32 being unable to move relative to the plate main body 31 when the external force is received. When the battery 100 is used for a certain period of time, expansion displacement occurs in the battery cell 20, so that an external force is applied to the sampling terminal 32, and the sampling terminal 32 of the flexible printed circuit board assembly 30 according to the embodiment of the present application can move according to 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. The body portion 311, the connection portion 313 and the deformation portion 312 of the flexible printed circuit board assembly 30 are integrally formed by pressing the plate main body 31, which is simple to manufacture and relatively efficient. By providing the first groove segment 3311 and the second groove segment 3312 in the plate main body 31, the body portion 311 and the connection portion 313 are separated in the plate main body 31, and by providing the third groove segment 3313 and the second groove 332 in the plate main body 31, the portion between the connection portion 313 and the body portion 311 has a reduced strength and is easily deformed, and therefore the deformation portion 312 is formed between the body portion 311 and the connection portion 313. In this way, when the sampling terminal 32 is subjected to an external force, the external force is transmitted to the connection portion 313, and the deformation portion 312 is pulled and deformed by the connection portion 313, thereby enabling the sampling terminal 32 to move relative to the main body portion 311, thereby preventing damage to the sampling terminal 32 or the plate main body 31 caused by the sampling terminal 32 being unable to move relative to the plate main body 31 when it is 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 connection portion 313 than the third groove segment 3313.When the sampling terminal 32 is welded to the connection portion 313, the heat transferred to the main body portion 311 can be reduced by the second groove 332, thereby reducing the effect of heat on the main body portion 311 during welding.

[0097] In some other embodiments of the present application, reference is made to FIG.

[0098] The second groove 332 includes a fourth groove segment 3321 and a fifth groove segment 3322 connected in sequence, and one end of the fourth groove segment 3321 penetrates the edge portion 34. The fifth groove segment 3322 and the third groove segment 3313 are arranged to be wound around each other, so that the deformation portion 312 extends along a spiral trajectory. The third groove segment 3313 and the fifth groove segment 3322 are wound around each other, so that the deformation portion 312 extends along a spiral trajectory, and the deformation portion 312 extending along the spiral trajectory is easy to deform and has a relatively large deformation range. The plate main body 31 includes a weak portion 35, and the weak portion 35 is connected to two opposing groove walls of the first groove segment 3311. By connecting the weak portion 35 to the two opposing groove walls of the first groove segment 3311, this contributes to positioning 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 above is only a preferred embodiment of the present application, and does not limit the present application. Those skilled in the art may have various modifications and changes to the present application. As long as it does not deviate from the spirit and principle, any modifications, equivalent replacements, improvements, etc., will fall within the protection scope of the present application. [Explanation of symbols]

[0100] 100 batteries 10. Chassis 11 Part 1 12 Part 2 20 Battery Cells 30 Flexible Printed Circuit Board Assembly 31 Board main body 311 Main body 312 Deformation 3121 Volume 1 Segment 3122 Volume 2 Segment 313 Connection 32 Sampling terminal 33 Groove 331 First groove 3311 First groove segment 3312 Second groove segment 3313 3rd groove segment 332 2nd groove 3321 4th groove segment 3322 5th groove segment 34 Edge 35 Weakened part 40 Busbar 200 Control device 300 Engine 1000 vehicles

Claims

1. A plate body and a sampling terminal are provided. The sampling terminal is configured to acquire electrical data of the target component; A groove is provided in the plate main body, and the groove penetrates the plate main body along a thickness direction of the plate main body, whereby the plate main body is divided into a main body portion, a connection portion, and a deformation portion by the groove; the connection portion is a portion connected to the sampling terminal, The deformation portion is connected to the main body portion and the connection portion, and the deformation portion is configured to be deformable so as to allow displacement of the connection portion relative to the main body portion. Flexible printed circuit board assembly.

2. The plate body 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, one end of the first groove segment penetrates the edge portion, the second groove segment extends along an extension direction of the edge portion, and 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 portion, and the plate main body has the deformation portion formed in a region between the second groove and the third groove segment.

2. The flexible printed circuit board assembly according to claim 1.

3. the second groove extends from the edge in a direction approaching the second groove segment, the third groove segment extends from the second groove segment in a direction approaching the edge, and the second groove is located between the third groove segment and the first groove segment in the extension direction of the edge; 3. The flexible printed circuit board assembly according to claim 2.

4. the second groove includes a fourth groove segment and a fifth groove segment connected in sequence, one end of the fourth groove segment penetrates the edge portion, and the fifth groove segment and the third groove segment are arranged to be wound around each other, so that the deformation portion extends along a spiral trajectory; 3. The flexible printed circuit board assembly according to claim 2.

5. a deformation amount of the deformation portion is allowed such that the connection portion is displaced beyond the first groove segment along the extension direction of the edge portion; The flexible printed circuit board assembly according to any one of claims 2 to 4.

6. The plate main body includes a weakened portion, and the weakened portion is connected to two opposing groove walls of the first groove segment. The flexible printed circuit board assembly according to any one of claims 2 to 5.

7. the deformation 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, and the first winding segment and the second winding segment are wound in the same direction with the connection position as a 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 body portion. The flexible printed circuit board assembly according to any one of claims 1 to 6.

8. The deformation portion extends along an S-shaped locus. The flexible printed circuit board assembly according to any one of claims 1 to 3.

9. The deformation portion extends along a helical trajectory.

5. A flexible printed circuit board assembly according to claim 1, 2 or 4.

10. A flexible printed circuit board assembly comprising: a plurality of battery cells; a bus bar; and the flexible printed circuit board assembly according to any one of claims 1 to 9; The bus bar is configured to connect the plurality of battery cells in series or in parallel, The sampling terminal is connected to the bus bar. battery.

11. 11. A battery according to claim 10, the battery being configured to provide electrical energy. Electrical equipment.

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