Busbars, sampling components, battery devices and electrical equipment

Abstract

The utility model discloses a bus, a sampling component, a battery device and electrical equipment, and relates to the field of battery technology. The battery device comprises a sampling component and a plurality of battery cells; the sampling component comprises a flexible circuit board and a plurality of buses; a plurality of sampling terminals distributed at intervals are arranged on both sides of the flexible circuit board; the plurality of buses are respectively connected to the plurality of battery cells, a limiting space is arranged in a welding area of ​​the bus, a head of the sampling terminal is a flexible sheet structure, the flexible sheet structure is inserted in the limiting space, the limiting space is configured to flatten the flexible sheet structure, and the flexible sheet structure is welded to the bus.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a bus bar, a sampling component, a battery device and electrical equipment. Background Art

[0002] In the current mainstream new energy vehicles, the power battery, as one of the main energy sources, mostly adopts a battery device composed of lithium cells. In the battery device, there are usually multiple cells arranged side by side, and each cell is electrically connected by a bus to form a battery device. Each bus needs to be connected to the sampling terminal of the FPC (flexible circuit board) to sample the cell status.

[0003] The sampling terminals are usually welded to the bus, however, the FPC sampling terminals of traditional products protrude from the main circuit part. Since the FPC sampling terminals are thin and soft, it is easy for the heads of the sampling terminals to warp. After the warping, the sampling terminals do not fit well with the bus bar, resulting in the problem of biased welding during the subsequent welding of the sampling terminals to the bar. Utility Model Content

[0004] In view of the above problems, the present application provides a bus, a sampling assembly, a battery device and an electrical equipment, aiming to solve the problem of biased welding caused by the warping of the sampling terminal.

[0005] The present application provides a battery device, which includes a sampling component and multiple battery cells; the sampling component includes a flexible circuit board and multiple bus bars; multiple sampling terminals are arranged at intervals on both sides of the flexible circuit board; the multiple bus bars are respectively connected to the multiple battery cells, and a limiting space is arranged in the welding area of ​​the bus bar. The head of the sampling terminal is a flexible sheet structure, and the flexible sheet structure is inserted in the limiting space. The limiting space is configured to flatten the flexible sheet structure, and the flexible sheet structure is welded to the bus bar.

[0006] In the technical solution of the embodiment of the present application, the technical solution of the utility model is to provide a limiting space in the welding area of ​​the bus. During the assembly process, the flexible sheet structure (head) of the sampling terminal is first inserted into the limiting space of the bus. During this process, the warped head of the sampling terminal can be flattened by the limiting space to absorb the warping of the head of the sampling terminal, so that the sampling terminal can fit with the bus. In the subsequent process of welding the sampling terminal to the bus, there will be no biased welding, thereby solving the problem of biased welding caused by the warping of the sampling terminal.

[0007] In some embodiments, a limiting groove is provided on one side of the busbar, and the limiting groove is a limiting space. With such a design, during the assembly process, the flexible sheet structure (head) of the sampling terminal can be inserted into the limiting groove from one side of the busbar, so that the head of the sampling terminal that is warped can be flattened and unfolded under the limiting action of the top wall and the bottom wall of the limiting groove, so as to effectively absorb the warping of the head of the sampling terminal, so that the sampling terminal can better fit the busbar. In addition, the sampling terminal can also be limited in the horizontal direction by the side wall of the limiting groove to enhance the limiting effect of the sampling terminal.

[0008] In some embodiments, a limiting groove is provided on one side of the busbar, a support is provided in the limiting groove, and a limiting space is formed between the support and the top wall of the limiting groove. With such a design, the height of the limiting groove can be designed to be much larger than the thickness of the sampling terminal, which makes it easier to insert the flexible sheet structure (head) of the sampling terminal into the limiting groove. After the head of the sampling terminal is inserted into the limiting groove, it will continue to be inserted into the limiting space formed between the support and the top wall of the limiting groove, so as to support the sampling terminal through the support. At the same time, the head of the sampling terminal that is warped can be flattened and unfolded under the limiting action of the top wall of the support and the top wall of the limiting groove, so as to effectively absorb the warping of the head of the sampling terminal, and also enable the sampling terminal to better fit the busbar.

[0009] In some embodiments, the support member is a spring sheet. With such a design, by using the spring sheet as the support member, the flexible sheet structure (head) of the sampling terminal can be inserted into the limiting space formed between the spring sheet and the top wall of the limiting groove, so that the sampling terminal is elastically supported by the spring sheet, and the head of the sampling terminal can be better absorbed under elastic extrusion.

[0010] In some embodiments, the bottom wall of the limit groove is provided with a groove arranged opposite to the spring sheet, and the groove is configured to accommodate the spring sheet. With such a design, in the subsequent process of welding the sampling terminal to the bus, the welding head of the welding equipment will be pressed against the top of the bus, so that the sampling terminal and the spring sheet are pressed downward after the bus is deformed, and the spring sheet is deformed downward and accommodated in the groove, so that the upper and lower surfaces of the sampling terminal are respectively in contact with the top wall and the bottom wall of the limit groove, thereby increasing the welding area between the sampling terminal and the bus, and improving the welding strength between the sampling terminal and the bus.

[0011] In some embodiments, the depth of the groove is greater than or equal to the thickness of the spring sheet. With this design, the spring sheet can be completely accommodated in the groove after being pressed downward and deformed, so that the upper and lower surfaces of the sampling terminal are fully in contact with the top wall and the bottom wall of the limiting groove, respectively, which can further increase the welding area between the sampling terminal and the bus bar, and further improve the welding strength between the sampling terminal and the bus bar.

[0012] In some embodiments, the spring sheet includes a connecting sheet and a supporting sheet; one side of the connecting sheet is connected to the bottom wall of the limiting groove, and the other side of the connecting sheet extends toward the top wall of the limiting groove; one side of the supporting sheet is connected to the side of the connecting sheet away from the bottom wall of the limiting groove, and a limiting space is formed between the supporting sheet and the top wall of the limiting groove. With such a design, the flexible sheet structure (head) of the sampling terminal can be inserted into the limiting space between the supporting sheet and the top wall of the limiting groove. Since the supporting sheet is connected to the limiting groove through the connecting sheet, the supporting sheet is in a suspended state, which can enhance the elastic supporting effect of the supporting sheet on the sampling terminal and better absorb the situation where the head of the sampling terminal is tilted. In addition, the design is more likely to deform after the spring sheet is pressed down, so that the upper and lower surfaces of the sampling terminal are more fully in contact with the top and bottom walls of the limiting groove, respectively, so as to increase the welding area between the sampling terminal and the bus.

[0013] In some embodiments, at least two spring sheets are provided, and the at least two spring sheets are spaced apart along the width direction of the limiting groove. Such a design can increase the elastic support area of ​​the sampling terminal through the design of at least two spring sheets, and can better absorb the situation where the head of the sampling terminal is tilted.

[0014] In some embodiments, a pressing sheet is provided on the surface of the bus, and a limiting space is formed between the pressing sheet and the surface of the bus. With such a design, a pressing sheet can be directly provided on the surface of the bus to form a limiting space between the pressing sheet and the surface of the bus. When the flexible sheet structure (head) of the sampling terminal is inserted into the limiting space, the sampling terminal is directly supported by the surface of the bus. At the same time, the head of the warped sampling terminal can be flattened and unfolded under the limiting action of the surface of the bus and the pressing sheet, so as to effectively absorb the warping of the head of the sampling terminal, and also enable the sampling terminal to better fit the bus.

[0015] In some embodiments, the flexible sheet structure is ultrasonically welded to the busbar. Such a design uses ultrasonic welding to weld the flexible sheet structure of the sampling terminal to the busbar, which has the advantages of fast welding speed, small deformation of the workpiece after welding, clean and beautiful surface of the welded object, no pollution to the workpiece, no generation of harmful gases, and low energy consumption.

[0016] The present application also provides a busbar, which is configured to connect battery cells. A limiting space is provided in the welding area of ​​the busbar. The head of the sampling terminal of the flexible circuit board is a flexible sheet structure, which is inserted into the limiting space. The limiting space is configured to flatten the flexible sheet structure, and the flexible sheet structure is welded to the busbar.

[0017] The present application also provides a sampling component, including a flexible circuit board and a plurality of buses; a plurality of sampling terminals are provided at intervals on both sides of the flexible circuit board; the plurality of buses are respectively connected to a plurality of battery cells, and a limiting space is provided in the welding area of ​​the bus; the head of the sampling terminal is a flexible sheet structure, and the flexible sheet structure is inserted in the limiting space, and the limiting space is configured to flatten the flexible sheet structure, and the flexible sheet structure is welded to the bus.

[0018] The present application also provides an electrical device, comprising the above-mentioned battery device.

[0019] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, which can be implemented in accordance with the contents of the specification, and to make other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 A top view of an embodiment of a sampling assembly of the present application;

[0022] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0023] Figure 3 A partial top view of an embodiment of a sampling assembly of the present application;

[0024] Figure 4 for Figure 3 A cross-sectional view of

[0025] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0026] Figure 6 A cross-sectional view of a position of an embodiment of a busbar of the present application;

[0027] Figure 7 for Figure 6 A partial enlarged view of point C in the middle;

[0028] Figure 8 A cross-sectional view of another position of an embodiment of a busbar of the present application;

[0029] Fig. 9 for Figure 8 A partial enlarged view of point D in the middle;

[0030] Fig.10 A top view of an embodiment of a busbar of the present application;

[0031] Fig.11 for Fig.10 A sectional view at A'-A';

[0032] Fig.12 This is a schematic structural diagram of a vehicle according to an embodiment of the present application.

[0033] Description of Figure Numbers:

[0034]

[0035] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0038] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0041] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0042] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0043] The battery device mentioned in this field is also called a battery. It can be divided into disposable batteries and rechargeable batteries according to whether it is rechargeable. The common types of rechargeable batteries are: lead-acid batteries, nickel-metal hydride batteries and lithium-ion batteries. Lithium-ion batteries are currently widely used in pure electric vehicles and hybrid vehicles. The capacity of lithium-ion batteries used for this purpose is relatively low, but they have larger output and charging current, and also have a longer service life, but the cost is higher.

[0044] The battery described in the embodiments of the present application refers to a rechargeable battery. The embodiments disclosed in the present application will be described below mainly by taking a lithium-ion battery as an example. It should be understood that the embodiments disclosed in the present application are applicable to any other appropriate type of rechargeable battery. The battery mentioned in the embodiments disclosed in the present application can be directly or indirectly applied to an appropriate device to power the device.

[0045] The battery mentioned in the embodiments disclosed in this application refers to a single physical module including one or more battery cells to provide a predetermined voltage and capacity. The battery cell is the basic unit in the battery, and can generally be divided into: cylindrical battery cells, rectangular battery cells and soft-pack battery cells according to the packaging method. The following will mainly focus on the rectangular battery cells. It should be understood that the embodiments described below are also applicable to cylindrical battery cells or soft-pack battery cells in some aspects.

[0046] The battery cell includes a positive electrode sheet, a negative electrode sheet, an electrolyte and a separator. Lithium-ion batteries mainly rely on the movement of lithium ions between the positive electrode sheet and the negative electrode sheet to work. In cylindrical batteries, the film structure of three layers of materials is wound into a cylindrical electrode assembly, while in rectangular batteries, the film structure is wound or stacked into an electrode assembly with a roughly rectangular shape.

[0047] In a common cell structure, the cell includes a shell, an electrode assembly and an electrolyte. The electrode assembly is contained in the cell shell, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. The shell includes a shell and an end cap. The shell includes a housing formed by a plurality of walls and an opening. The end cap is arranged at the opening to close the housing. In addition to the electrode assembly, the housing cavity also contains an electrolyte. The positive electrode sheet and the negative electrode sheet in the electrode assembly include tabs. In order to avoid passing a large current without melting, the number of positive tabs is multiple and stacked together, and the number of negative tabs is multiple and stacked together. The tabs are electrically connected to the electrode terminals located outside the cell through connecting members, and the electrode terminals generally include a positive electrode terminal and a negative electrode terminal. For a rectangular cell, the electrode terminal is generally arranged at the end cap portion. Multiple cells are connected in series and / or in parallel via the electrode terminals for various applications.

[0048] The battery device provided in the embodiment of the present application can be a power source for electrical equipment. Electrical equipment can be a mobile phone, a portable device, a laptop computer, a battery car, an electric car, a ship, a spacecraft, an electric toy, an electric tool, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer.

[0049] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device in an embodiment of the present application.

[0050] For example, Fig.12This is a structural diagram of an embodiment of a vehicle 1000 of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle, etc. A battery device 110, a controller 200 and a motor 300 may be provided inside the vehicle 1000. The controller 200 is used to control the battery device 110 to power the motor 300. For example, a battery device 110 may be provided at the bottom, front or rear of the vehicle 1000. The battery device 110 may be used to power the vehicle 1000. For example, the battery device 110 may be used as an operating power source for the vehicle 1000, for the circuit system of the vehicle 1000, for example, for the working power demand during the start, navigation and operation of the vehicle 1000. In another embodiment of the present application, the battery device 110 may not only be used as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0051] In the current mainstream new energy vehicles, the power battery, as one of the main energy sources, mostly adopts a battery device composed of lithium cells. In the battery device, there are usually multiple cells arranged side by side, and each cell is electrically connected by a bus to form a battery device. Each bus needs to be connected to the sampling terminal of the FPC (flexible circuit board) to sample the cell status.

[0052] The sampling terminals are usually welded to the bus. However, the sampling terminals of the FPC of traditional products protrude from the main circuit part. Since the sampling terminals of the FPC are thin and soft, it is easy for the heads of the sampling terminals to warp. After the warping, the sampling terminals do not fit well with the bus bar, resulting in the problem of biased welding in the subsequent process of welding the sampling terminals to the bar.

[0053] Based on the above problems, the present invention proposes a battery device 110, which aims to solve the problem of biased welding caused by the warping of the sampling terminal 11. The device 110 will be described in detail below with reference to specific drawings and embodiments.

[0054] See also Figures 1 to 9 In one embodiment of the utility model, the battery device 110 includes a sampling component 100 and a plurality of battery cells; the sampling component 100 includes a flexible circuit board 10 and a plurality of bus bars 20; a plurality of sampling terminals 11 are arranged at intervals on both sides of the flexible circuit board 10; the plurality of bus bars 20 are respectively connected to the plurality of battery cells, and a limiting space 20a is arranged in a welding area a of the bus bar 20; the head of the sampling terminal 11 is a flexible sheet structure 111, and the flexible sheet structure 111 is inserted in the limiting space 20a, and the limiting space 20a is configured to flatten the flexible sheet structure 111, and the flexible sheet structure 111 is welded to the bus bar 20.

[0055] In this embodiment, the flexible circuit board 10 connected to the plurality of buses 20 includes a main body and a sampling terminal 11 protruding from a circuit portion of the main body, so the sampling terminal 11 is relatively thin and soft. During the assembly process, the flexible sheet structure 111 (head) of the sampling terminal 11 is inserted into the limiting space 20a of the bus 20. Since the limiting space 20a is relatively small and its height is only slightly greater than the thickness of the sampling terminal 11, the flexible sheet structure 111 (head) of the sampling terminal 11 can be inserted into the limiting space 20a. The limiting action of the upper and lower sides of the limiting space 20a can flatten and unfold the warped head of the sampling terminal 11 to absorb the warping of the head of the sampling terminal 11, so that the sampling terminal 11 can fit the bus 20.

[0056] In actual application, the limiting space 20a can be a groove formed inside the bus 20, or a groove formed by the bus 20 and the external structure, as long as the flexible sheet structure 111 of the sampling terminal 11 can be flattened by the limiting space 20a when the flexible sheet structure 111 of the sampling terminal 11 is inserted into the limiting space 20a.

[0057] In practical applications, the flexible sheet structure 111 of the sampling terminal 11 can be welded to the busbar 20 by ultrasonic welding, laser welding, arc welding, or the like.

[0058] It should be noted that the flexible sheet structure 111 may include a flexible plate, a flexible sheet, etc.

[0059] In summary, in the technical solution of the embodiment of the present application, the technical solution of the utility model is to provide a limiting space 20a in the welding area a of the bus 20. During the assembly process, the flexible sheet structure (head) of the sampling terminal 11 is first inserted into the limiting space 20a of the bus 20. During this process, the head of the sampling terminal 11 that is warped can be flattened by the limiting space 20a to absorb the warping of the head of the sampling terminal 11, so that the sampling terminal 11 can be fitted with the bus 20. In the subsequent process of welding the sampling terminal 11 to the bus 20, there will be no biased welding, thereby solving the problem of biased welding caused by the warping of the sampling terminal 11.

[0060] In an embodiment of the present invention, a limiting groove 21 is defined on one side of the bus bar 20 , and the limiting groove 21 is a limiting space 20 a .

[0061] It can be understood that in this embodiment, the bus 20 can be provided with a partial structure of the limiting groove 21 similar to the structure of a card insertion machine, except that what is inserted into the limiting groove 21 is not a card, but a thinner and softer sampling terminal 11. Therefore, when the flexible sheet structure 111 (head) of the sampling terminal 11 is inserted into the limiting groove 21, the raised sampling terminal 11 can be flattened by the limiting groove 21.

[0062] With such a design, during the assembly process, the flexible sheet structure 111 (head) of the sampling terminal 11 can be inserted into the limiting groove 21 from one side of the bus 20, so that the head of the sampling terminal 11 that is warped can be flattened and unfolded under the limiting action of the top wall and the bottom wall of the limiting groove 21, so as to effectively absorb the warping of the head of the sampling terminal 11, so that the sampling terminal 11 can be better fitted with the bus 20. In addition, the sampling terminal 11 can also be limited in the horizontal direction by the side wall of the limiting groove 21 to improve the limiting effect of the sampling terminal 11.

[0063] See also Figure 5 , Figure 7 , Fig. 9 In another embodiment of the utility model, a limiting groove 21 is provided on one side of the bus 20 , a supporting member is provided in the limiting groove 21 , and a limiting space 20 a is formed between the supporting member and the top wall of the limiting groove 21 .

[0064] With such a design, the height of the limiting groove 21 can be designed to be much larger than the thickness of the sampling terminal 11, which makes it easier to insert the flexible sheet structure 111 (head) of the sampling terminal 11 into the limiting groove 21. After the head of the sampling terminal 11 is inserted into the limiting groove 21, it can continue to be inserted into the limiting space 20a formed between the support and the top wall of the limiting groove 21, so as to support the sampling terminal 11 through the support. At the same time, the warped head of the sampling terminal 11 can be flattened and unfolded under the limiting action of the top wall of the support and the top wall of the limiting groove 21, so as to effectively absorb the warping of the head of the sampling terminal 11, and also enable the sampling terminal 11 to better fit with the bus 20.

[0065] In practical applications, the support member may be an elastic spring sheet 22 or a rigid support plate.

[0066] See also Figure 5 , Figure 7 , Fig. 9 In one embodiment of the present invention, the support member may be a spring piece 22 .

[0067] With such a design, by using the spring sheet 22 as a supporting member, the flexible sheet structure 111 (head) of the sampling terminal 11 can be inserted into the limiting space 20a formed between the spring sheet 22 and the top wall of the limiting groove 21, so that the sampling terminal 11 is elastically supported by the spring sheet 22, and the head of the sampling terminal 11 can be better absorbed under elastic extrusion.

[0068] See also Figure 7 , Fig. 9In one embodiment of the utility model, the bottom wall of the limiting groove 21 is provided with a groove 211 arranged opposite to the elastic piece 22 , and the groove 211 is configured to accommodate the elastic piece 22 .

[0069] With such a design, in the subsequent process of welding the flexible sheet structure 111 of the sampling terminal 11 to the bus 20, the welding head of the welding equipment will be pressed against the top of the bus 20, so that the sampling terminal 11 and the spring 22 are pressed downward after the bus 20 is deformed. The spring 22 is deformed downward and accommodated in the groove 211, so that the upper and lower surfaces of the sampling terminal 11 are respectively abutted against the top wall and the bottom wall of the limiting groove 21, thereby increasing the welding area between the sampling terminal 11 and the bus 20 and improving the welding strength between the sampling terminal 11 and the bus 20.

[0070] It can be understood that before welding, the spring sheet 22 is located above the groove 211 , and after the welding head is pressed down, the spring sheet 22 is pressed down and deformed before being accommodated in the groove 211 .

[0071] In actual application, the spring sheet 22 can be completely accommodated in the groove 211, or partially accommodated in the groove 211, as long as the spring sheet 22 is pressed downward and deformed so that the sampling terminal 11 can abut against the bottom wall of the limiting groove 21 to increase the welding area between the sampling terminal 11 and the bus 20.

[0072] See also Figure 7 , Fig. 9 In one embodiment of the present invention, the depth of the groove 211 is greater than or equal to the thickness of the spring piece 22 .

[0073] With this design, the spring piece 22 can be completely accommodated in the groove 211 after being pressed downward and deformed, so that the upper and lower surfaces of the sampling terminal 11 are fully in contact with the top wall and the bottom wall of the limiting groove 21 respectively, which can further increase the welding area between the sampling terminal 11 and the bus 20, and further improve the welding strength between the sampling terminal 11 and the bus 20.

[0074] It should be noted that the depth of the groove 211 refers to the depth of the groove 211 in the direction from the top wall to the bottom wall of the limiting groove 21 .

[0075] See also Figures 9 to 11 In one embodiment of the utility model, the spring piece 22 includes a connecting piece 221 and a supporting piece 222; one side of the connecting piece 221 is connected to the bottom wall of the limiting groove 21, and the other side of the connecting piece 221 extends toward the top wall of the limiting groove 21; one side of the supporting piece 222 is connected to the side of the connecting piece 221 away from the bottom wall of the limiting groove 21, and a limiting space 20a is formed between the supporting piece 222 and the top wall of the limiting groove 21.

[0076] With such a design, the flexible sheet structure 111 (head) of the sampling terminal 11 can be inserted into the limiting space 20a between the support sheet 222 and the top wall of the limiting groove 21. Since the support sheet 222 is connected to the limiting groove 21 through the connecting sheet 221, the support sheet 222 is in a suspended state, which can enhance the elastic support effect of the support sheet 222 on the sampling terminal 11 and better absorb the warping of the head of the sampling terminal 11. In addition, the design is more likely to deform after the spring sheet 22 is pressed down, so that the upper and lower surfaces of the sampling terminal 11 are more fully in contact with the top wall and the bottom wall of the limiting groove 21, respectively, so as to increase the welding area between the sampling terminal 11 and the bus 20.

[0077] In this embodiment, please refer to Fig.11 The spring piece 22 composed of the connecting piece 221 and the supporting piece 222 can be an L-shaped structural member rotated 90 degrees clockwise.

[0078] In practical applications, the connecting piece 221 and the supporting piece 222 can be an integral structure or a separate structure. When the connecting piece 221 and the supporting piece 222 are an integral structure, the connecting piece 221 and the supporting piece 222 can be formed by bending to form an angle; when the connecting piece 221 and the supporting piece 222 are separate structures, they can be connected by bonding, welding, screw connection, etc.

[0079] See also Figure 5 , Figure 7 , Fig. 9 In one embodiment of the utility model, at least two spring pieces 22 are provided, and at least two spring pieces 22 are spaced apart and distributed along the width direction of the limiting groove 21 .

[0080] Such a design can increase the elastic support area of ​​the sampling terminal 11 through the design of at least two spring pieces 22 , and can better absorb the situation where the head of the sampling terminal 11 is warped.

[0081] In addition, compared with using a whole structure with a large area to support the sampling terminal 11, this embodiment uses at least two spaced-apart springs 22 to increase the elastic support area of ​​the sampling terminal 11, which makes it easier for the spring 22 to deform when pressed down.

[0082] In another embodiment of the present invention, a pressing sheet is provided on the surface of the busbar 20 , and a limiting space 20 a is formed between the pressing sheet and the surface of the busbar 20 .

[0083] With such a design, a pressing sheet can be directly provided on the surface of the bus 20 to form a limiting space 20a between the pressing sheet and the surface of the bus 20. When the flexible sheet structure 111 (head) of the sampling terminal 11 is inserted into the limiting space 20a, the sampling terminal 11 is directly supported by the surface of the bus 20. At the same time, the head of the sampling terminal 11 that is warped can be flattened and unfolded under the limiting action of the surface of the bus 20 and the pressing sheet, so as to effectively absorb the warping of the head of the sampling terminal 11, and also enable the sampling terminal 11 to better fit the bus 20.

[0084] In practical applications, the pressing sheet can be an elastic structure or a rigid structure.

[0085] See also Figures 1 to 5 In one embodiment of the present invention, the flexible sheet structure 111 is ultrasonically welded to the bus bar 20 .

[0086] Such a design uses ultrasonic welding to weld the flexible sheet structure 111 of the sampling terminal 11 to the bus 20, which has the advantages of fast welding speed, small deformation of the workpiece after welding, clean and beautiful welded surface, no pollution to the workpiece, no generation of harmful gases, and low energy consumption.

[0087] See also Figures 6 to 11 The utility model also proposes a busbar 20, which is configured to connect battery cells. A welding area a of the busbar 20 is provided with a limiting space 20a. The head of the sampling terminal 11 of the flexible circuit board 10 is a flexible sheet structure 111, and the flexible sheet structure 111 is inserted into the limiting space 20a. The limiting space 20a is configured to flatten the flexible sheet structure 111, and the flexible sheet structure 111 is welded to the busbar 20.

[0088] In the technical solution of the embodiment of the present application, the technical solution of the utility model is provided with a limiting space 20a in the welding area a of the bus 20. During the assembly process, the flexible sheet structure 111 (head) of the sampling terminal 11 of the flexible circuit board 10 is first inserted into the limiting space 20a of the bus 20. During this process, the head of the warped sampling terminal 11 can be flattened by the limiting space 20a to absorb the warping of the head of the sampling terminal 11, so that the sampling terminal 11 can be fitted with the bus 20. In the subsequent process of welding the sampling terminal 11 to the bus 20, there will be no biased welding, thereby solving the problem of biased welding caused by the warping of the sampling terminal 11.

[0089] See also Figures 1 to 5The utility model also proposes a sampling component 100, including a flexible circuit board 10 and a plurality of bus bars 20; a plurality of sampling terminals 11 are arranged at intervals on both sides of the flexible circuit board 10; the plurality of bus bars 20 are respectively connected to a plurality of battery cells, a welding area a of the bus bar 20 is provided with a limiting space 20a, a head of the sampling terminal 11 is a flexible sheet structure 111, the flexible sheet structure 111 is inserted into the limiting space 20a, the limiting space 20a is configured to flatten the flexible sheet structure 111, and the flexible sheet structure 111 is welded to the bus bar 20.

[0090] In the technical solution of the embodiment of the present application, the technical solution of the utility model is provided with a limiting space 20a in the welding area a of the bus 20. During the assembly process, the flexible sheet structure 111 (head) of the sampling terminal 11 of the flexible circuit board 10 is first inserted into the limiting space 20a of the bus 20. During this process, the head of the warped sampling terminal 11 can be flattened by the limiting space 20a to absorb the warping of the head of the sampling terminal 11, so that the sampling terminal 11 can be fitted with the bus 20. In the subsequent process of welding the sampling terminal 11 to the bus 20, there will be no biased welding, thereby solving the problem of biased welding caused by the warping of the sampling terminal 11.

[0091] The utility model further proposes an electrical device, which includes a battery device 110. The specific structure of the battery device 110 refers to the above embodiment. Since the electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0092] According to some embodiments of the present application, the present application provides an electrical device including a battery device 110, in combination with reference to Figures 1 to 11 The battery device 110 includes a sampling component 100 and a plurality of battery cells; the sampling component 100 includes a flexible circuit board 10 and a plurality of bus bars 20; a plurality of sampling terminals 11 are arranged at intervals on both sides of the flexible circuit board 10; the plurality of bus bars 20 are respectively connected to the plurality of battery cells, a limiting groove 21 is arranged on one side of the bus bar 20, a spring sheet 22 is arranged in the limiting groove 21, a limiting space 20a is formed between the spring sheet 22 and the top wall of the limiting groove 21, a groove 211 is arranged opposite to the spring sheet 22 on the bottom wall of the limiting groove 21, the groove 211 is configured to accommodate the spring sheet 22, at least part of the sampling terminal 11 is a flexible sheet structure 111, the flexible sheet structure 111 is inserted in the limiting space 20a, the limiting space 20a is configured to flatten the flexible sheet structure 111, and the flexible sheet structure 111 is ultrasonically welded to the bus bar 20.

[0093] In the technical solution of the embodiment of the present application, after the flexible sheet structure 111 (head) of the sampling terminal 11 is inserted into the limiting groove 21, the technical solution of the utility model will continue to be inserted into the limiting space 20a formed between the support member and the top wall of the limiting groove 21, so as to support the sampling terminal 11 through the support member, and at the same time, the head of the warped sampling terminal 11 can be flattened and unfolded under the limiting action of the top wall of the support member and the top wall of the limiting groove 21, so as to effectively absorb the warping of the head of the sampling terminal 11, and also enable the sampling terminal 11 to better fit with the bus 20, and no biased welding will occur in the subsequent process of welding the sampling terminal 11 to the bus 20, thereby solving the problem of biased welding caused by the warping of the sampling terminal 11. And in the subsequent process of welding the sampling terminal 11 to the bus 20, the welding head of the welding equipment will be pressed against the top of the bus 20, so that the sampling terminal 11 and the spring 22 are pressed downward after the bus 20 is deformed, and the spring 22 is deformed downward and accommodated in the groove 211, so that the upper and lower surfaces of the sampling terminal 11 are respectively abutted against the top wall and bottom wall of the limiting groove 21, thereby increasing the welding area between the sampling terminal 11 and the bus 20, and improving the welding strength between the sampling terminal 11 and the bus 20.

[0094] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery device, characterized in that: The invention comprises a sampling component and a plurality of battery cells, wherein the sampling component comprises: A flexible circuit board, wherein two sides of the flexible circuit board are provided with a plurality of sampling terminals distributed at intervals; and A plurality of busbars are provided, wherein the plurality of busbars are respectively connected to the plurality of battery cells, a limiting space is provided in a welding area of ​​the busbar, the head of the sampling terminal is a flexible sheet structure, the flexible sheet structure is inserted in the limiting space, the limiting space is configured to flatten the flexible sheet structure, and the flexible sheet structure is welded to the busbar.

2. The battery device according to claim 1, characterized in that A limiting groove is provided on one side of the bus bar, and the limiting groove serves as the limiting space.

3. The battery device according to claim 1, characterized in that: A limiting groove is provided on one side of the busbar, a supporting member is provided in the limiting groove, and the limiting space is formed between the supporting member and the top wall of the limiting groove.

4. The battery device according to claim 3, characterized in that: The supporting member is a spring sheet.

5. The battery device according to claim 4, characterized in that: The bottom wall of the limiting groove is provided with a groove arranged opposite to the elastic sheet, and the groove is configured to accommodate the elastic sheet.

6. The battery device according to claim 5, characterized in that The depth of the groove is greater than or equal to the thickness of the spring sheet.

7. The battery device according to claim 4, characterized in that: The shrapnel comprises: A connecting piece, one side of which is connected to the bottom wall of the limiting groove, and the other side of which extends toward the top wall of the limiting groove; and A support sheet, one side of which is connected to a side of the connecting sheet away from the bottom wall of the limiting groove, and the limiting space is formed between the support sheet and the top wall of the limiting groove.

8. The battery device according to claim 4, characterized in that: At least two of the spring sheets are provided, and the at least two spring sheets are spaced apart and distributed along the width direction of the limiting groove.

9. The battery device according to any one of claims 1 to 8, characterized in that: A pressing sheet is provided on the surface of the bus bar, and the limiting space is formed between the pressing sheet and the surface of the bus bar; And / or, the flexible sheet structure is ultrasonically welded to the busbar.

10. A busbar, characterized in that: The busbar is configured to connect the battery cells, a limiting space is provided in the welding area of ​​the busbar, the head of the sampling terminal of the flexible circuit board is a flexible sheet structure, the flexible sheet structure is inserted in the limiting space, the limiting space is configured to flatten the flexible sheet structure, and the flexible sheet structure is welded to the busbar.

11. A sampling assembly, characterized in that: include: A flexible circuit board, wherein two sides of the flexible circuit board are provided with a plurality of sampling terminals distributed at intervals; and A plurality of busbars are provided, wherein the plurality of busbars are respectively connected to a plurality of battery cells, a limiting space is provided in a welding area of ​​the busbar, the head of the sampling terminal is a flexible sheet structure, the flexible sheet structure is inserted in the limiting space, the limiting space is configured to flatten the flexible sheet structure, and the flexible sheet structure is welded to the busbar.

12. An electrical equipment, characterized in that: A battery device comprising the battery device as claimed in any one of claims 1 to 9.

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