Battery assembly and electric equipment

Abstract

The utility model relates to battery technical field, discloses a battery pack and electric equipment, battery pack includes flexible circuit board and battery cell subassembly, battery cell subassembly includes naked battery cell, naked battery cell includes shell, battery cell and tab, shell includes main part and encapsulation part, battery cell is accommodated in main part, main part includes top wall, encapsulation part includes top seal part, the encapsulation part includes the top seal part, the top sealing part is connected with the top wall, the tab is connected with the battery cell and extends out of the top sealing part, the flexible circuit board comprises a fixing part, a connecting part, a mounting part and a clamping part, the connecting part is provided with a first end, a second end and a third end, one end of the fixing part is electrically connected with the tab, the other end of the fixing part is connected with the first end, the mounting part is connected with the second end, and the clamping part is connected with the third end; the fixing part and the top wall are oppositely arranged in the first direction. By means of the mode, in the process that the flexible circuit board is placed into the mold through the mechanical arm, the risk of interference between the mechanical arm and the mold can be reduced.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of batteries, and in particular to a battery assembly and an electrical device. Background Art

[0002] FPC (Flexible Printed Circuit) is used in many lithium battery products. Since FPC has the bendable property, the internal structure of the lithium battery can be flexibly designed, thereby improving the energy density of the lithium battery.

[0003] See also Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the structure of the existing FPC when it is not bent. Figure 2 Yes Figure 1 Schematic diagram of the structure when the FPC in the mold is placed in the mold 200 for injection molding, the FPC includes a fixing portion 21', a connecting portion 22' and a mounting portion 23', one end of the fixing portion 21' is connected to one end of the connecting portion 22', the other end of the fixing portion 21' is used to fix with the battery cell assembly 1', the mounting portion 23' is connected to the connecting portion 22', and the mounting portion 23' is provided with an electronic component, wherein the other end of the fixing portion 21' is fixed to the battery cell assembly 1' by injection molding, and the specific operation is as follows: first, the battery cell assembly 1' is placed in the mold 200; then, the FPC is placed in the mold 200 by the manipulator 300; then, the mold 200 is closed and plastic is injected into the mold 200, so as to achieve the fixation between the fixing portion 21' and the battery cell assembly 1'; then, the battery 100' in the mold 200 is taken out; finally, the FPC is bent to obtain Figure 4 The battery 100' is shown in FIG.

[0004] During the implementation of the embodiment of the utility model, the inventor found that when the FPC is placed into the mold by the robot, interference is likely to occur between the robot and the mold, making it difficult to place the FPC into the mold. Utility Model Content

[0005] The embodiments of the utility model provide a battery assembly and an electrical device, which can reduce the risk of interference between the manipulator and the mold during the process of placing a flexible circuit board into a mold by a manipulator.

[0006] In order to solve the above technical problems, a technical solution adopted in an embodiment of the utility model is: providing a battery assembly, including a flexible circuit board and a battery cell assembly, the battery cell assembly including a bare battery cell, the bare battery cell including a shell, an electrode assembly and a pole ear, the shell including a main body and a packaging part, the electrode assembly is accommodated in the main body, the main body includes a top wall, the packaging part includes a top sealing part, the top sealing part is connected to the top wall, the pole ear is connected to the electrode assembly and extends from the top sealing part, the flexible circuit board includes a fixing part, a connecting part, an installing part and a clamping part, the connecting part has a first end, a second end and a third end, one end of the fixing part is electrically connected to the pole ear, the other end of the fixing part is connected to the first end, the installing part is connected to the second end, the clamping part is connected to the third end, and along the first direction, the fixing part is arranged opposite to the top wall.

[0007] In this embodiment, a clamping portion is provided on the flexible circuit board, and the clamping portion is connected to the third end of the connecting portion. The clamping portion can be clamped by a robot, and then the entire flexible circuit board can be placed in the mold. This can reduce the risk of interference between the robot and the mold, and can reduce the difficulty of placing the flexible circuit board into the mold.

[0008] Optionally, the flexible circuit board further includes a bending portion, one end of the bending portion is connected to one end of the fixing portion, the other end of the bending portion is connected to the first end, and along the first direction, the connecting portion and the fixing portion are arranged opposite to each other.

[0009] In this embodiment, a bending portion is provided so that in the first direction, the connecting portion is opposite to the fixing portion, which helps to reduce the size of the battery assembly in the second direction, thereby reducing the space occupied by the battery assembly, wherein the second direction is from one end of the fixing portion toward the other end.

[0010] Optionally, along the second direction, the first end and the third end are arranged opposite to each other, wherein the second direction is perpendicular to the first direction.

[0011] In this embodiment, the first end and the third end are arranged opposite to each other, and because the fixing part is connected to the first end and the clamping part is connected to the third end, the clamping part can protrude from the mounting part in the second direction, which is conducive to the robot arm grasping the clamping part.

[0012] Optionally, in the second direction, a dimension D1 of the clamping portion satisfies: 2 mm ≤ D1 ≤ 15 mm.

[0013] Optionally, in the second direction, a dimension D1 of the clamping portion satisfies: 3 mm ≤ D1 ≤ 6 mm.

[0014] Optionally, the connecting portion also has a fourth end, the fourth end and the second end are arranged opposite to each other along a third direction, the clamping portion has a first edge, the first edge is connected to an end of the fourth end away from the first end, and the clamping portion is provided with a first guide groove, which is connected to the first edge.

[0015] In this embodiment, a first guide groove is provided on the clamping portion, so that a corresponding protrusion can be provided on a manipulator for clamping the flexible circuit board. When the manipulator clamps the clamping portion, the protrusion gradually slides into the first guide groove, so that the protrusion can pull the fixing portion, the bending portion and the connecting portion, which is beneficial to reduce the risk of wrinkles on the flexible circuit board during the process of placing the flexible circuit board into the mold.

[0016] Optionally, the flexible circuit board is provided with a first avoidance groove, the first avoidance groove is located at the connection between the connecting portion and the mounting portion, and the first avoidance groove is located on a side of the mounting portion facing the bending portion.

[0017] In this embodiment, by providing a first avoidance groove at the connection between the second end of the connecting portion and the mounting portion, the stress between the mounting portion and the connecting portion can be reduced.

[0018] Optionally, the flexible circuit board is further provided with a second avoidance groove, the second avoidance groove is located at the connection between the mounting portion and the connecting portion, and the first avoidance groove and the second avoidance groove are respectively located on two opposite sides of the mounting portion.

[0019] In this embodiment, by providing a second avoidance groove at the connection between the mounting portion and the clamping portion, the stress between the mounting portion and the clamping portion can be reduced.

[0020] Optionally, along the third direction, the third end is arranged opposite to the second end, wherein the third direction and the first direction are perpendicular to each other.

[0021] Optionally, the flexible circuit board is further provided with a third avoidance groove, the third avoidance groove is provided at the connection between the second end and the first end of the connecting portion, and the third avoidance groove is located on a side of the mounting portion facing the bending portion.

[0022] In this embodiment, by providing a third avoidance groove at the connection between the second end and the first end of the connecting portion, it is helpful to reduce the stress between the mounting portion and the connecting portion.

[0023] Optionally, the clamping portion has a second edge, and along the third direction, the second edge is arranged opposite to the third end, and the clamping portion is provided with a second guide groove, and the second guide groove is connected to the second edge.

[0024] In this embodiment, a second guide groove is provided on the clamping portion, so that a corresponding protrusion can be provided on the manipulator for clamping the flexible circuit board. When the manipulator clamps the clamping portion, the protrusion gradually slides into the second guide groove, so that the protrusion can gradually straighten the fixing portion, the bending portion and the connecting portion, which is beneficial to reduce the risk of wrinkles on the flexible circuit board during the process of placing the flexible circuit board into the mold.

[0025] Optionally, in the third direction, a dimension D2 of the clamping portion satisfies: 2 mm ≤ D2 ≤ 15 mm.

[0026] Optionally, in the third direction, a dimension D2 of the clamping portion satisfies: 3 mm ≤ D2 ≤ 6 mm.

[0027] Optionally, the top sealing portion includes a first sub-top sealing portion, the pole ear extends from the first sub-top sealing portion, and along the first direction, the first sub-top sealing portion is arranged opposite to the top wall; the battery cell assembly also includes a substrate, along the first direction, the substrate and the first sub-top sealing portion are arranged opposite to each other, and the substrate is arranged on the side of the first sub-top sealing portion away from the top wall, and the substrate is electrically connected to the pole ear; along the first direction, the fixing portion is arranged opposite to the substrate and the fixing portion is electrically connected to the substrate.

[0028] In this embodiment, the first sub-top sealing portion is arranged opposite to the top wall, and the electrode tab extends from the first sub-top sealing portion, which is beneficial to reducing the size of the battery assembly in the first direction.

[0029] Optionally, the battery assembly further includes an injection molding part, which wraps the pole ear, the first sub-top sealing part, the substrate and at least a portion of the fixing part, and fills the space between the first sub-top sealing part and the top wall and between the substrate and the first sub-top sealing part.

[0030] In this embodiment, by wrapping the pole ear, the first sub-top seal part, the substrate and at least part of the fixing part with the injection molding part, the pole ear, the first sub-top seal part, the substrate and the fixing part can be better fixed, which is beneficial to reduce the risk of the pole ear, the first sub-top seal part, the substrate and the flexible circuit board falling off.

[0031] In order to solve the above technical problems, another technical solution adopted in the embodiment of the utility model is: to provide an electrical device, including a load and the above battery assembly, the battery assembly is connected to the load, and the battery assembly is used to supply power to the load.

[0032] The beneficial effects of the embodiments of the utility model are as follows: different from the prior art, in the embodiments of the utility model, the flexible circuit board includes a fixing part, a connecting part, an installing part and a clamping part, the connecting part has a first end, a second end and a third end, one end of the fixing part is electrically connected to the pole ear of the bare battery cell, the other end of the fixing part is connected to the first end, the installing part is connected to the second end, and the clamping part is connected to the third end, so that when the flexible circuit board is placed in the mold, the clamping part of the flexible circuit board can be clamped by a robot, which is beneficial to reduce the risk of interference between the robot and the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0034] Figure 1 It is a structural schematic diagram of a flexible circuit board in the prior art;

[0035] Figure 2 Yes Figure 1 Schematic diagram of the structure when the flexible circuit board is placed into the mold;

[0036] Figure 3 yes Figure 2 A magnified view of the area shown in part A;

[0037] Figure 4 It is a schematic diagram of a partial structure of a battery in the prior art;

[0038] Figure 5 It is a schematic diagram of the structure of a battery assembly provided in an embodiment of the utility model;

[0039] Figure 6 is an exploded schematic diagram of a battery assembly provided in an embodiment of the utility model;

[0040] Figure 7 It is a schematic diagram of a partial cross-sectional structure of a battery assembly provided in an embodiment of the utility model;

[0041] Figure 8 It is a schematic diagram of the structure of the flexible circuit board provided in the embodiment of the utility model when it is not bent;

[0042] Fig. 9 It is a schematic diagram of the structure of the flexible circuit board after being bent provided in the embodiment of the utility model;

[0043] Fig.10 It is a structural schematic diagram of a flexible circuit board provided in an embodiment of the utility model when a first guide groove is provided;

[0044] Fig.11 It is a schematic diagram of the structure when the second end and the third end of the flexible circuit board provided in the embodiment of the utility model are opposite to each other;

[0045] Fig.12 yes Figure 6 A magnified view of the area shown in part B;

[0046] Fig.13 yes Figure 6 Magnified view of the area shown in center C.

[0047] Reference Numbers

[0048] 100. Battery assembly; 1. Cell assembly; 11. Shell; 111. Main body; 1111. Top wall; 112. Packaging part; 1121. Top seal part; 11211. First sub-top seal part; 11212. Second sub-top seal part; 11213. Third sub-top seal part; 1122. Side seal part; 11221. First protruding part; 11222. Second protruding part; 12. Electrode assembly; 13. Tab; 2. Flexible circuit board; 21. Fixing part; 22. Connecting part; 221. First end; 222. Second end; 223. Third end; 23. Mounting part; 24. Clamping part; 241. First guide groove; 242. Second guide groove; 25. Bending part; 26. First avoidance groove; 27. Second avoidance groove; 28. Third avoidance groove; 20. Fourth avoidance groove; 3. Substrate; 4. Injection molding part. DETAILED DESCRIPTION

[0049] In order to facilitate the understanding of the utility model, the utility model is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element or there can be one or more centered elements therebetween. When an element is described as "connected" to another element, it can be directly connected to another element or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0050] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not used to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more related listed items.

[0051] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0052] See also Figure 1 , Figure 2 and Figure 3 , Figure 1 is a schematic diagram of the structure of the flexible circuit board 2' in the existing battery 100' when it is not bent. Figure 2 Yes Figure 1 Schematic diagram of the structure when the flexible circuit board 2' is placed in the mold 200. The existing flexible circuit board 2' includes a fixing part 21', a connecting part 22' and a mounting part 23', one end of the fixing part 21' is connected to one end of the connecting part 22', the other end of the fixing part 21' is used to fix with the battery cell assembly 1', the mounting part 23' is connected to the connecting part 22', and the mounting part 23' is provided with an electronic component, wherein the other end of the fixing part 21' is fixed to the battery cell assembly 1' by injection molding, and the specific operation is as follows: first, the battery cell assembly 1' is placed in the mold 200; then, the connecting part 22' is clamped by the robot 300 and the entire flexible circuit board 2' is placed in the mold 200; then, the mold 200 is closed and plastic is injected into the mold 200, so as to achieve the fixation between the fixing part 21' and the battery cell assembly 1'; finally, the flexible circuit board 2' is bent according to actual needs to obtain Figure 4 The battery 100' shown in FIG. In the process of using the manipulator 300 to clamp the connection portion 22' to place the flexible circuit board 2' into the mold 200, the manipulator 300 is prone to interference with the mold 200, which makes it difficult to place the flexible circuit board 2' into the mold 200, and even easily causes the flexible circuit board 2' to be placed in the mold 200 in the wrong position, resulting in a defective battery 100'. To this end, the present application provides a battery assembly 100 that can reduce the risk of interference between the manipulator 300 and the mold 200. The battery assembly 100 provided by the present application is described in detail below.

[0053] See also Figure 5 , Figure 6 and Figure 7 The battery assembly 100 includes a cell assembly 1 and a flexible circuit board 2. The cell assembly 1 includes a bare cell. The bare cell includes a shell 11, an electrode assembly 12 and a tab 13. The shell 11 includes a main body 111 and a packaging part 112. The electrode assembly 12 is accommodated in the main body 111. The main body 111 includes a top wall 1111. The packaging part 112 includes a top sealing part 1121. The top sealing part 1121 is connected to the top wall 1111, and the top sealing part 1121 seals the top wall 1111 of the main body 111 to reduce the risk of electrolyte leakage in the main body 111. One end of the tab 13 is connected to the electrode assembly 12, and the other end extends from the top sealing part 1121, so that the tab 13 can input or output current to the electrode assembly 12. Please refer to Figure 8 and Fig. 9 , Figure 8 is a schematic diagram of the structure of the flexible circuit board 2 when it is not bent. Fig. 92 is a schematic diagram of the structure of the flexible circuit board 2 after bending. The flexible circuit board 2 can be deformed under the action of a certain external force, and has the ability to maintain the deformed shape after deformation. That is to say, although the flexible circuit board 2 is flexible, it has a certain ability to maintain its own shape. The flexible circuit board 2 includes a fixing portion 21, a connecting portion 22, a mounting portion 23 and a clamping portion 24. Along the first direction X, the fixing portion 21 is arranged opposite to the top wall 1111, and the fixing portion 21 is fixed to the housing 11. The connecting portion 22 has a first end 221, a second end 222 and a third end 223, wherein, Figure 8 and Fig. 9 The three dotted lines in the figure represent the boundaries of the connection portion 22 in three directions. One end of the fixing portion 21 is electrically connected to the pole ear 13, and the other end of the fixing portion 21 is connected to the first end 221. The fixing portion 21 is used to fix the flexible circuit board 2 to the battery cell assembly 1 and realize the electrical connection between the flexible circuit board 2 and the battery cell assembly 1. The mounting portion 23 is connected to the second end 222, and a connector 231 is arranged on the mounting portion 23. The connector 231 is electrically connected to the battery cell assembly 1 through the fixing portion 21. The connector 231 is also used to connect the terminal device so that the battery cell assembly 1 can supply power to the terminal device through the connector 231. The clamping portion 24 is connected to the third end 223, and the clamping portion 24 is configured to be clamped by the robot 300. In the process of clamping the clamping portion 24 by the robot 300 and placing at least part of the flexible circuit board 2 into the mold 200, the risk of interference between the robot 300 and the mold 200 can be reduced, which is conducive to reducing the difficulty of placing the flexible circuit board 2 into the mold 200, improving the accuracy of the position of the flexible circuit board 2 in the mold 200, and helping to reduce defective products during injection molding.

[0054] In some embodiments, the flexible circuit board 2 further includes a bending portion 25, one end of the bending portion 25 is connected to one end of the fixing portion 21, the other end of the bending portion 25 is bent and extended in a direction away from the fixing portion 21, and the other end of the bending portion 25 is connected to the first end 221 of the connecting portion 22, and the connecting portion 22 is arranged opposite to the fixing portion 21 along the first direction X. In this embodiment, by providing the bending portion 25, the connecting portion 22 is located at a position opposite to the fixing portion 21, so that the size of the flexible circuit board 2 in the second direction Y can be reduced, which is conducive to reducing the size of the battery assembly 100 in the second direction Y, thereby reducing the space occupied by the battery assembly 100, wherein the second direction Y points from one end of the fixing portion 21 to the other end.

[0055] It is worth noting that the fixing portion 21 of the flexible circuit board 2 is welded to the battery cell assembly 1 to achieve electrical connection between the fixing portion 21 and the battery cell assembly 1. When the flexible circuit board 2 is placed in the mold 200, the welding position of the fixing portion 21 and the battery cell assembly 1 is accommodated in the molding cavity 2001 of the mold 200, so that when the molding cavity 2001 is injected, the plastic can wrap the welding position of the fixing portion 21 and the battery cell assembly 1, thereby insulating and protecting the welding position.

[0056] In some embodiments, see Figure 8 and Fig. 9 , along the second direction Y, the first end 221 and the third end 223 of the connecting portion 22 are arranged opposite to each other, wherein the second direction Y is perpendicular to the first direction X, and the second direction Y points from one end of the fixing portion 21 to the other end. Since the bending portion 25 is connected to the first end 221, the mounting portion 23 is connected to the second end 222, and the clamping portion 24 is connected to the third end 223, that is, along the second direction Y, the clamping portion 24 is located at the end of the connecting portion 22 away from the bending portion 25, therefore, when the flexible circuit board 2 is placed in the molding cavity 2001 of the mold 200, the clamping portion 24 is located away from the molding cavity 2001, so that when the manipulator 300 clamps the clamping portion 24 and places the flexible circuit board 2 into the mold 200, the risk of interference between the manipulator 300 and the mold 200 can be reduced.

[0057] Since the clamping portion 24 is used for clamping by the robot 300, in order to achieve effective clamping, the size of the clamping portion 24 cannot be too short. If the size of the clamping portion 24 is too long, it will increase the material of the flexible circuit board 2, which is not conducive to reducing costs, and will take up extra space, which is not conducive to the spatial layout of the battery and the terminal. Therefore, please refer to Fig. 9 In the second direction Y, a dimension D1 of the clamping portion 24 satisfies: 2 mm ≤ D1 ≤ 15 mm.

[0058] For further information, see Fig. 9 In the second direction Y, the dimension D1 of the clamping portion 24 satisfies: 3mm≤D1≤6mm. In this way, the robot 300 can reduce the material of the flexible circuit board 2 while effectively clamping the clamping portion 24, which is conducive to cost saving.

[0059] In some embodiments, see Fig. 9 In the third direction Z, the dimension L1 of the clamping portion 24 satisfies: 3mm≤L1≤6mm, wherein the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0060] In some embodiments, see Fig.10The connecting portion 22 also has a fourth end 224, which is arranged opposite to the second end 222 along the third direction Z direction. The clamping portion 24 has a first side 243, which is connected to an end of the fourth end 224 away from the first end 221, and the fourth end 224 and the first side 243 extend along the Y direction. The clamping portion 24 is provided with a first guide groove 241, which is roughly arc-shaped and connected to the first side 243. In this embodiment, by providing the first guide groove 241, a protrusion (not shown) matching with the first guide groove 241 can be provided on the manipulator 300 for clamping the clamping portion 24. When the manipulator 300 clamps the clamping portion 24, the protrusion can be inserted into the first guide groove 241, so that the risk of the flexible circuit board 2 being skewed relative to the manipulator 300 can be reduced, which is conducive to reducing the occurrence of the situation where the flexible circuit board 2 cannot be placed in the mold 200 due to the skew of the flexible circuit board 2 relative to the manipulator 300. Secondly, after the protrusion is inserted into the first guide groove 241, it can exert a certain pulling effect on the fixing portion 21, the bending portion 25 and the connecting portion 22, which is conducive to reducing the risk of wrinkles on the flexible circuit board 2 during the process of placing the flexible circuit board 2 into the mold 200. In addition, the first guide groove 241 cooperates with the protrusion of the manipulator 300 and also has a positioning function, so that the manipulator 300 can clamp the clamping portion 24 in the correct position, which is conducive to ensuring that the flexible circuit board 2 can be normally placed in the mold 200 and that the flexible circuit board 2 is in an accurate position relative to the mold 200, which is conducive to reducing the occurrence of defective products.

[0061] In some embodiments, see Fig. 9, one end of the mounting portion 23 is connected to the second end 222 of the connecting portion 22, and the other end of the mounting portion 23 extends approximately along the first direction X in a direction away from the connecting portion 22, which is equivalent to bending the mounting portion 23 to a position approximately perpendicular to the connecting portion 22, which is conducive to connecting the connector 231 located on the mounting portion 23 to the mainboard of the electrical device to supply power to the electrical device. However, since the mounting portion 23 and the connecting portion 22 are bent and the two are approximately perpendicular, it is easy to generate a large stress at the connection between the mounting portion 23 and the connecting portion 22. When the stress is too large, it is easy for the mounting portion 23 to be difficult to bend to a position approximately perpendicular to the connecting portion 22. In order to reduce the stress at the connection between the mounting portion 23 and the connecting portion 22, the flexible circuit board 2 is also provided with a first avoidance groove 26, and the first avoidance groove 26 is located at the connection between the second end 222 of the connecting portion 22 and the mounting portion 23. The mounting portion 23 has a fifth end 232 and a sixth end 233, and the fifth end 232 and the sixth end 233 are arranged relatively along the second direction Y. The second end 222 has a first sub-end 2221 and a second sub-end 2222, the first sub-end 2221 is close to the first end 221 and connected to the fifth end 232, the second sub-end 2222 is close to the third end 223 and connected to the sixth end 233, and the first avoidance groove 26 connects the first sub-end 2221 and the fifth end 232 of the second end 222. In this embodiment, by providing the first avoidance groove 26 at the connection between the second end 222 of the connecting portion 22 and the mounting portion 23, the stress at the connection between the mounting portion 23 and the connecting portion 22 can be reduced, which is conducive to reducing the difficulty of bending the mounting portion 23 to be substantially perpendicular to the connecting portion 22.

[0062] In some embodiments, see Fig.10 The flexible circuit board 2 is further provided with a second avoidance groove 27, which is located at the connection between the mounting portion 23 and the second end 222 of the connecting portion 22, and the second avoidance groove 27 connects the second sub-end portion 2222 and the sixth end 233 of the second end 222, and along the second direction Y, the first avoidance groove 26 and the second avoidance groove 27 are respectively located on both sides of the mounting portion 23. In this embodiment, by providing the second avoidance groove 27 and cooperating with the above-mentioned first avoidance groove 26, the stress at the connection between the mounting portion 23 and the connecting portion 22 can be further reduced, thereby reducing the difficulty of bending the mounting portion 23 to be substantially perpendicular to the connecting portion 22.

[0063] In some embodiments, in addition to the method of disposing the third end 223 of the connecting portion 22 opposite to the first end 221 in the first direction X, the method of disposing the third end 223 and the second end 222 of the connecting portion 22 opposite to each other in the third direction Z may also be adopted. Fig.11 , Fig.11 The structure of the flexible circuit board 2 in which the third end 223 and the second end 222 are arranged opposite to each other in the third direction Z is shown, and Fig.11 The three dotted lines in the figure represent the boundaries of the connection portion 22 in three directions. Since the bending portion 25 is connected to the first end 221 of the connection portion 22, the mounting portion 23 is connected to the second end 222 of the connection portion 22, and the clamping portion 24 is connected to the third end 223 of the connection portion 22, that is, along the third direction Z, the clamping portion 24 and the mounting portion 23 are respectively located on both sides of the connection portion 22, so when the manipulator 300 is used to put the flexible circuit board 2 into the mold 200, the manipulator 300 can clamp the clamping portion 24 that is far away from the molding cavity 2001 of the mold 200 in the third direction Z, which can also reduce the risk of interference between the manipulator 300 and the mold 200.

[0064] and Fig. 9 or Fig.10 The structure of the flexible circuit board 2 shown in FIG. Fig.11 In the structure of the flexible circuit board 2 shown in the figure, in order to facilitate the connection of the connector 231 located on the mounting portion 23 with the mainboard of the electrical device to supply power to the electrical device, it is usually necessary to bend the mounting portion 23 to a position substantially perpendicular to the connecting portion 22. This will also generate a large stress at the connection between the mounting portion 23 and the second end 222 of the connecting portion 22. Therefore, please refer to Fig.11 The flexible circuit board 2 is provided with a third avoidance groove 28, which is provided at the connection between the second end 222 and the first end 221 of the connecting portion 22, the first end 221 has a third sub-end 2211 close to the second end 222 and a fourth sub-end 2212 close to the third end 223, the bending portion 25 has a seventh end 251 and an eighth end 252 arranged opposite to each other along the third direction Z, the seventh end 251 is connected to the third sub-end 2211, the eighth end 252 is connected to the fourth sub-end 2212, and the third avoidance groove 28 is connected to the first sub-end 2221, the fifth end 232 and the seventh end 251 of the second end 222, that is, the third avoidance groove 28 is located at the intersection of the mounting portion 23, the connecting portion 22 and the bending portion 25. In this embodiment, by providing the third avoidance groove 28, the stress at the connection between the mounting portion 23 and the second end 222 of the connecting portion 22 can be reduced, which is conducive to reducing the difficulty of bending the mounting portion 23 to be substantially perpendicular to the connecting portion 22.

[0065] It is understandable that the flexible circuit board 2 may also be provided with a fourth avoidance groove 20, which is provided at the connection between the mounting portion 23 and the second end 222 of the connecting portion 22. Specifically, the second end 222 has a fifth sub-end 2223 away from the first end 221, and the mounting portion 23 has a fifth end 232 and a sixth end 233 arranged opposite to each other along the second direction Y. The fifth sub-end 2223 is connected to the fifth end 232, and the fourth avoidance groove 28 is connected to the fifth sub-end 2223 and the sixth end 233. That is, along the second direction Y, the fourth avoidance groove 20 and the third avoidance groove 28 are respectively located on both sides of the mounting portion 23. In this embodiment, by providing the fourth avoidance groove 20 and cooperating with the third avoidance groove 28, the stress generated at the connection between the mounting portion 23 and the second end 222 of the connecting portion 22 can be further reduced, thereby reducing the difficulty of bending the mounting portion 23 to be substantially perpendicular to the connecting portion 22.

[0066] In some embodiments, see Fig.11 , the clamping portion 24 is provided with a second guide groove 242, and the shape of the second guide groove 242 is roughly arc-shaped. The clamping portion 24 has a second side 244, and along the third direction Z, the second side 244 is arranged opposite to the third end 223, and the second guide groove 242 is connected to the second side 244. In this embodiment, by providing the second guide groove 242, a protrusion (not shown) matching with the second guide groove 242 can be provided on the manipulator 300 for clamping the clamping portion 24. When the manipulator 300 clamps the clamping portion 24, the protrusion can be inserted into the second guide groove 242, so that the risk of the flexible circuit board 2 being skewed relative to the manipulator 300 can be reduced, which is conducive to avoiding the situation where the flexible circuit board 2 is skewed relative to the manipulator 300 and the flexible circuit board 2 cannot be placed in the mold 200. Secondly, after the protrusion is inserted into the second guide groove 242, it can exert a certain pulling effect on the fixing portion 21, the bending portion 25 and the connecting portion 22, which is conducive to reducing the risk of wrinkles on the flexible circuit board 2 during the process of placing the flexible circuit board 2 into the mold 200. In addition, the second guide groove 242 cooperates with the protrusion of the manipulator 300 and also has a positioning function, so that the manipulator 300 can clamp the clamping portion 24 in the correct position, which is conducive to ensuring that the flexible circuit board 2 is normally placed in the mold 200 and that the flexible circuit board 2 is in an accurate position relative to the mold 200, which is conducive to reducing the occurrence of defective products.

[0067] In some embodiments, see Fig.11 In the third direction Z, the dimension D2 of the clamping portion 24 satisfies: 2mm≤D2≤15mm. In this embodiment, by making 2mm≤D2≤15mm, the volume of the clamping portion 24 can be reduced while ensuring that the robot 300 can clamp the clamping portion 24, which is beneficial to reducing the raw materials of the flexible circuit board 2.

[0068] Furthermore, in the third direction Z, the dimension D2 of the clamping portion 24 further satisfies: 3 mm ≤ D2 ≤ 6 mm.

[0069] For the above-mentioned packaging part 112, please refer to Fig.12 and Fig.13 In addition to the top seal portion 1121, the packaging portion 112 also includes a side seal portion 1122, and the main body 111 also includes a side wall. The side seal portion 1122 is connected to the side wall, and the side seal portion 1122 is used to package the side wall. The side seal portion 1122 includes a first protruding portion 11221 and a second protruding portion 11222 protruding from the top wall 1111 along the first direction X. The first protruding portion 11221 and the second protruding portion 11222 are arranged opposite to each other along the second direction Y, and along the second direction Y, the top seal portion 1121, the tab 13 and the flexible circuit board 2 are all located between the first protruding portion 11221 and the second protruding portion 11222.

[0070] For the top seal 1121, please refer to Figure 6 , Figure 7 , Fig.12 and Fig.13 The top seal portion 1121 includes a first sub-top seal portion 11211, one end of the first sub-top seal portion 11211 is connected to the top wall 1111 of the housing 11, and along the first direction X, the first sub-top seal portion 11211 is bent toward the top wall 1111, and at least a portion of the first sub-top seal portion 11211 is arranged opposite to the top wall 1111 of the housing 11 along the first direction X. The tab 13 extends from the first sub-top seal portion 11211, and the portion of the tab 13 extending from the first sub-top seal portion 11211 is bent and extends to the surface of the first sub-top seal portion 11211 away from the top wall 1111. The flexible circuit board 2 is located on the side of the first sub-top seal portion 11211 away from the top wall 1111, the fixed portion 21 of the flexible circuit board 2 is electrically connected to the portion of the tab 13 extending out of the first sub-top seal portion 11211, and the fixed portion 21 of the flexible circuit board 2 is electrically connected to the connector 231 provided on the mounting portion 23, so that the flexible circuit board 2 can input and output current. In this embodiment, along the first direction X, the first sub-top seal portion 11211 is arranged to be opposite to the top wall 1111 of the housing 11, which is conducive to reducing the size of the housing 11 in the first direction X, thereby facilitating reducing the volume of the battery assembly 100.

[0071] Furthermore, the top sealing portion 1121 also includes a second sub-top sealing portion 11212 and a third sub-top sealing portion 11213, and the second sub-top sealing portion 11212 and the third sub-top sealing portion 11213 both extend along the first direction X, the second sub-top sealing portion 11212 is respectively connected to the first sub-top sealing portion 11211 and the first protruding portion 11221, and the third sub-top sealing portion 11213 is respectively connected to the first sub-top sealing portion 11211 and the second protruding portion 11222.

[0072] In some embodiments, the side seal portion 1122, the first sub-top seal portion 11211, the second sub-top seal portion 11212 and the third sub-top seal portion 11213 are connected as a whole.

[0073] In some embodiments, see Figure 6 and Figure 7 The battery cell assembly 1 also includes a substrate 14, which is electrically connected to the pole ear 13. The substrate 14 is provided with a protective electronic component (not shown), which is used to protect the bare battery cell, such as voltage monitoring, current detection, temperature monitoring, insulation monitoring, etc. of the bare battery cell, so as to reduce the risk of the battery cell assembly 1 being in an overcharge, over-discharge, overcurrent, short circuit state and ultra-high temperature charge and discharge state. The substrate 14 is located between the first protruding portion 11221 and the second protruding portion 11222. The substrate 14 is arranged on the side of the first sub-top seal portion 11211 away from the top wall 1111, and the substrate 14 is electrically connected to the portion of the pole ear 13 extending out of the first sub-top seal portion 11211. Along the first direction X, the fixing portion 21 of the flexible circuit board 2 is arranged opposite to the substrate 14, and the fixing portion 21 is welded to the substrate 14 to form an electrical connection between the fixing portion 21 and the substrate 14, so that the flexible circuit board 2 can be electrically connected to the pole ear 13 through the substrate 14. Therefore, when the connector 231 on the mounting portion 23 is connected to the mainboard of the electrical device, the battery assembly 100 can supply power to the electrical device.

[0074] In some embodiments, the number of the electrode tabs 13 may be one, two, or more than two. When the number of the electrode tabs 13 is two or more than two, all the electrode tabs 13 are electrically connected to the substrate 14 .

[0075] It is understandable that in other embodiments, the substrate 14 may not be provided (not shown), and the fixing portion 21 may be directly electrically connected to the tab 13 , so that current can also be input and output to the battery cell assembly 1 through the flexible circuit board 2 .

[0076] Furthermore, the battery assembly 100 also includes an injection molding part 4, which wraps the top wall, the pole ear 13, the first sub-top seal part 11211, the second sub-top seal part 11212, the third sub-top seal part 11213, the substrate 14 and at least a portion of the fixing part 21, and the injection molding part 4 fills the space between the first sub-top seal part 11211 and the top wall 1111 and between the substrate 14 and the first sub-top seal part 11211, so that the injection molding part 4 can fix the pole ear 13, the first sub-top seal part 11211, the second sub-top seal part 11212, the third sub-top seal part 11213, the substrate 14 and the fixing part 21 to the main body 111.

[0077] It is worth mentioning that the injection molding part 4 is formed by placing the battery cell assembly 1 and the fixing part 21 of the flexible circuit board 2 into the above-mentioned mold 200, and then injecting plastic into the molding cavity 2001 of the mold 200, so that the injection molding part 4 can fill the gaps between the pole ear 13, the first sub-top seal part 11211, the second sub-top seal part 11212, the third sub-top seal part 11213, the substrate 14 and the fixing part 21, which is beneficial to fix these components and reduce the risk of the flexible circuit board 2 falling off.

[0078] In an embodiment of the utility model, the flexible circuit board 2 includes a fixing portion 21, a connecting portion 22, an installation portion 23 and a clamping portion 24, the connecting portion 22 has a first end 221, a second end 222 and a third end 223, one end of the fixing portion 21 is electrically connected to the pole ear 13 of the bare battery cell, the other end of the fixing portion 21 is connected to the first connection, the installation portion 23 is connected to the second end 222, and the clamping portion 24 is connected to the third end 223, so that when the flexible circuit board 2 is placed in the mold 200, the clamping portion 24 of the flexible circuit board 2 can be clamped by the manipulator 300, which is beneficial to reduce the risk of interference between the manipulator 300 and the mold 200.

[0079] The utility model also provides an embodiment of an electric device, which includes a load and the above-mentioned battery assembly 100, the battery assembly 100 is connected to the load, and the battery assembly 100 is used to supply power to the load, wherein the load includes but is not limited to mobile phones, tablet computers, cameras and other devices that require electricity.

[0080] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A battery assembly, comprising a flexible circuit board and a cell assembly, wherein the cell assembly comprises a bare cell, the bare cell comprises a shell, an electrode assembly and a tab, the shell comprises a main body and a packaging part, the electrode assembly is accommodated in the main body, the main body comprises a top wall, the packaging part comprises a top sealing part, the top sealing part is connected to the top wall, the tab is connected to the electrode assembly and extends out from the top sealing part, characterized in that: The flexible circuit board includes a fixing portion, a connecting portion, a mounting portion and a clamping portion, the connecting portion having a first end, a second end and a third end, one end of the fixing portion is electrically connected to the pole ear, the other end of the fixing portion is connected to the first end, the mounting portion is connected to the second end, and the clamping portion is connected to the third end, and along a first direction, the fixing portion is arranged opposite to the top wall.

2. The battery assembly according to claim 1, characterized in that: The flexible circuit board further includes a bending portion, one end of which is connected to one end of the fixing portion, the other end of which is connected to the first end, and along the first direction, the connecting portion and the fixing portion are arranged opposite to each other.

3. The battery assembly according to claim 1, characterized in that: The first end and the third end are arranged opposite to each other along a second direction, wherein the second direction is perpendicular to the first direction.

4. The battery assembly according to claim 3, characterized in that: In the second direction, a dimension D1 of the clamping portion satisfies: 2 mm ≤ D1 ≤ 15 mm.

5. The battery assembly according to claim 4, characterized in that: In the second direction, a dimension D1 of the clamping portion satisfies: 3 mm ≤ D1 ≤ 6 mm.

6. The battery assembly according to claim 1, characterized in that: The connecting portion also has a fourth end, and the fourth end is arranged opposite to the second end along a third direction. The clamping portion has a first edge, and the first edge is connected to an end of the fourth end away from the first end. The clamping portion is provided with a first guide groove, and the first guide groove is connected to the first edge.

7. The battery assembly according to claim 2, characterized in that: The flexible circuit board is provided with a first avoidance groove, the first avoidance groove is located at the connection between the connecting portion and the mounting portion, and the first avoidance groove is located at a side of the mounting portion facing the bending portion.

8. The battery assembly according to claim 7, characterized in that: The flexible circuit board is further provided with a second avoidance groove, the second avoidance groove is located at the connection between the mounting portion and the connecting portion, and the first avoidance groove and the second avoidance groove are respectively located on two opposite sides of the mounting portion.

9. The battery assembly according to claim 2, characterized in that: Along a third direction, the third end is arranged opposite to the second end, wherein the third direction and the first direction are perpendicular to each other.

10. The battery assembly according to claim 9, characterized in that: The flexible circuit board is further provided with a third avoidance groove, which is provided at the connection between the second end and the first end of the connecting portion, and is located on a side of the mounting portion facing the bending portion.

11. The battery assembly according to claim 9, characterized in that: The clamping portion has a second side, and along the third direction, the second side is arranged opposite to the third end, and the clamping portion is provided with a second guide groove, and the second guide groove is connected to the second side.

12. The battery assembly according to claim 9, characterized in that: In the third direction, a dimension D2 of the clamping portion satisfies: 2mm≤D2≤15mm.

13. The battery assembly according to claim 12, characterized in that: In the third direction, a dimension D2 of the clamping portion satisfies: 3mm≤D2≤6mm.

14. The battery assembly according to claim 1, characterized in that: The top sealing portion includes a first sub-top sealing portion, the pole lug extends from the first sub-top sealing portion, and along the first direction, the first sub-top sealing portion is arranged opposite to the top wall; The battery cell assembly also includes a substrate, which is arranged on a side of the first sub-top seal portion away from the top wall and is electrically connected to the tab; along the first direction, the fixing portion is arranged opposite to the substrate and is electrically connected to the substrate.

15. The battery assembly according to claim 14, characterized in that: The battery assembly also includes an injection molding part, which wraps the tab, the first sub-top sealing part, the substrate and at least part of the fixing part, and fills the space between the first sub-top sealing part and the top wall and between the substrate and the first sub-top sealing part.

16. An electrical equipment, characterized in that: It comprises a load and a battery assembly as described in any one of claims 1 to 15, wherein the battery assembly is connected to the load, and the battery assembly is used to supply power to the load.

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