Battery devices and electrical equipment

Abstract

The present application belongs to the field of battery production technology, and provides a battery device and electrical equipment, wherein the battery device includes a battery cell assembly and a collection integrated assembly, wherein the battery cell assembly includes a plurality of battery cells; the collection integrated assembly includes a flexible circuit board and a plurality of electrical connectors, each electrical connector being used to connect to a corresponding battery cell; wherein a first hollow structure, a second hollow structure and a third hollow structure are provided on the flexible circuit board, the electrical connector has a first side and a second side, the first hollow structure and the second hollow structure correspond to the two first sides of the electrical connector respectively, the third hollow structure corresponds to the second side of the electrical connector, and a first connecting rib is formed between the first hollow structure and the third hollow structure, and a second connecting rib is formed between the second hollow structure and the third hollow structure. The battery device provided in the embodiment of the present application has a higher strength of the flexible circuit board in the collection integrated assembly and better anti-fracture performance.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and in particular to a battery device and electrical equipment. Background Art

[0002] In the related technology, the Cell Connection System (CCS) is composed of brackets, copper-aluminum bars, FPC and other structural parts. Multiple battery cells are connected in series and parallel through the copper-aluminum bars on the collection integrated busbar to assemble a battery cell assembly. At the same time, the FPC detects and monitors the voltage and temperature of the battery cells in real time, and transmits the collection signal to the battery management system to achieve overcurrent protection and thermal runaway management of the battery cell assembly.

[0003] However, in order to absorb the expansion stress of battery cells during recycling, a large number of hollow structures will be formed on the FPC, which will cause the overall structure of the FPC to be weak. Especially during the transportation of battery cell assemblies, there is a certain probability that the FPC will break. Utility Model Content

[0004] The purpose of the present application is to provide a battery device and an electrical device, aiming to solve the technical problem that the FPC on the current collecting busbar in the battery device is prone to breakage due to its hollow design.

[0005] In a first aspect, the present application provides a battery device, comprising:

[0006] A battery cell assembly, wherein the battery cell assembly includes a plurality of battery cells;

[0007] A collection integrated component, the collection integrated component comprising a flexible circuit board and a plurality of electrical connectors disposed on the flexible circuit board, each of the electrical connectors being used to connect to a corresponding battery cell;

[0008] Among them, the flexible circuit board is provided with a first hollow structure, a second hollow structure and a third hollow structure, the electrical connector has two oppositely arranged first sides and a second side connected to the two first sides, the first hollow structure and the second hollow structure respectively correspond to the two first sides of the electrical connector, the third hollow structure corresponds to the second side of the electrical connector, and a first connecting rib is formed between the first hollow structure and the third hollow structure, and a second connecting rib is formed between the second hollow structure and the third hollow structure.

[0009] The beneficial effects of the utility model are as follows: the battery device provided by the embodiment of the present application has a corresponding hollow design for the flexible circuit board of the integrated component. Specifically, the two first sides of the electrical connector are respectively provided with a first hollow structure and a second hollow structure, and a third hollow structure is provided on the second side of the electrical connector, and a first connecting rib is formed between the first hollow structure and the third hollow structure, and a second connecting rib is formed between the second hollow structure and the third hollow structure. In this way, connecting ribs exist on both sides (two first sides) of the electrical connector to form a stable connection mode, so as to reduce the tearing caused by the warping or folding of the flexible circuit board during the reprinting process of the battery device. At the same time, the pulling effect caused by the thermal expansion of each battery cell can be satisfied, that is, a fracture can occur at the first connecting rib or the second connection. The battery device provided by the embodiment of the present application has a higher strength of the flexible circuit board in the integrated component and better anti-fracture performance.

[0010] In some embodiments, the first hollow structure includes a first notch formed by an edge of the flexible circuit board being recessed inward.

[0011] By adopting the above technical solution, the first notch can meet the pulling demand of the flexible circuit board after the corresponding battery cell expands, so as to absorb the displacement change caused by the expansion of the battery cell.

[0012] In some embodiments, the first notch has a first cut edge, a second cut edge arranged opposite to the first cut edge, and a third cut edge connecting the first cut edge and the second cut edge, and an extension direction of the third cut edge forms an angle a with an extension direction of the first cut edge, and a is an acute angle.

[0013] By adopting the above technical solution, when the electrical connector is pulled due to expansion of the battery cell, the connection between the first cutting edge and the third cutting edge of the first notch is the first location where tearing occurs, thereby reducing the probability of pulling between the electrical connector and the flexible circuit board.

[0014] In some embodiments, the second hollow structure includes a second notch formed by an inward depression of an edge side of the flexible circuit board.

[0015] By adopting the above technical solution, similarly, the second notch can meet the pulling demand of the flexible circuit board after the corresponding battery cell expands, so as to absorb the displacement change caused by the expansion of the battery cell.

[0016] In some embodiments, the second notch has a fourth cut edge, a fifth cut edge arranged opposite to the fourth cut edge, and a sixth cut edge connecting the fourth cut edge and the fifth cut edge, and an extension direction of the sixth cut edge forms an angle b with an extension direction of the fourth cut edge, and b is an acute angle.

[0017] By adopting the above technical solution, similarly, when the electrical connector is pulled due to expansion of the battery cell, the connection between the fourth cut edge and the sixth cut edge of the second notch is the first location where tearing occurs, thereby reducing the probability of pulling between the electrical connector and the flexible circuit board.

[0018] In some embodiments, the first hollow structure includes a first closed through hole formed on the flexible circuit board.

[0019] By adopting the above technical solution, the first through hole can also meet the pulling demand of the flexible circuit board after the corresponding battery cell expands, so as to absorb the displacement change caused by the expansion of the battery cell.

[0020] In some embodiments, the first through hole has a straight first hole wall and an arc-shaped second hole wall, the first hole wall is connected to the second hole wall, and the distance between the first hole wall and the edge of the flexible circuit board is M, 0.8mm≤M≤1.0mm.

[0021] By adopting the above technical solution, when the electrical connector is pulled due to the expansion of the battery cell, the rib formed between the first hole wall and the edge of the flexible circuit board is the first location where the rupture occurs, thereby reducing the probability of pulling between the electrical connector and the flexible circuit board.

[0022] In some embodiments, the second hollow structure includes a second through hole formed on the flexible circuit board and in a closed state.

[0023] By adopting the above technical solution, similarly, the second through hole can also meet the pulling demand of the flexible circuit board after the corresponding battery cell expands, so as to absorb the displacement change caused by the expansion of the battery cell.

[0024] In some embodiments, the second through hole has a third hole wall in a straight state and a fourth hole wall in an arc-shaped state, the third hole wall and the fourth hole wall are connected, and the distance between the third hole wall and the edge side of the flexible circuit board is N, 0.8mm≤N≤1.0mm.

[0025] By adopting the above technical solution, when the electrical connector is pulled due to the expansion of the battery cell, the rib formed between the third hole wall and the edge of the flexible circuit board is the first location to break, thereby reducing the probability of pulling between the electrical connector and the flexible circuit board.

[0026] In some embodiments, the third hollow structure includes a first slot formed on the flexible circuit board, the first slot having a first slot end; the first slot end extends to the first hollow structure and forms the first connecting rib with the first hollow structure.

[0027] By adopting the above technical solution, when the electrical connector is pulled due to the expansion of the battery cell, the first connecting rib is the first location where tearing occurs, so as to reduce the probability of pulling between the electrical connector and the flexible circuit board.

[0028] In some embodiments, the third hollow structure also includes a third through hole formed on the flexible circuit board, the first slot has a second slot end opposite to the first slot end, the second slot end is in a straight state, the third through hole is arranged corresponding to the second slot end, and a third connecting rib is formed between the third through hole and the second slot end, the width of the third connecting rib is A, 0.8mm≤A≤1.0mm, and the third through hole corresponds to the second hollow structure to form the second connecting rib.

[0029] By adopting the above technical solution, when the electrical connector is pulled due to the expansion of the battery cell, the third connecting rib and the second connecting rib may be broken to reduce the probability of pulling between the electrical connector and the flexible circuit board.

[0030] In some embodiments, the third hollow structure includes a first slot, a fourth through hole and a fifth through hole formed on the flexible circuit board, the first slot having a first slot end and a second slot end, the first slot end and the second slot end are both in a straight state, the fourth through hole is arranged corresponding to the first slot end, and a fourth connecting rib is formed between the fourth through hole and the first slot end, the width of the fourth connecting rib is B, 0.8mm≤B≤1.0mm, and the fourth through hole corresponds to the first hollow structure to form the first connecting rib, the fifth through hole is arranged corresponding to the second slot end, and a fifth connecting rib is formed between the fifth through hole and the second slot end, the width of the fifth connecting rib is C, 0.8mm≤C≤1.0mm, and the fifth through hole corresponds to the second hollow structure to form the second connecting rib.

[0031] By adopting the above technical solution, when the electrical connector is pulled due to the expansion of the battery cell, the first connecting rib, the second connecting rib, the fourth connecting rib and the fifth connecting rib may all be broken to reduce the probability of pulling between the electrical connector and the flexible circuit board.

[0032] In some embodiments, the third hollow structure includes a first groove and a second groove formed on the flexible circuit board and arranged in an alternating manner, the first groove having a first groove end, the first groove end extending to the first hollow structure and forming the first connecting rib with the first hollow structure, the second groove having a third groove end, the third groove end extending to the second hollow structure and forming the second connecting rib with the second hollow structure.

[0033] By adopting the above technical solution, when the electrical connector is pulled due to the expansion of the battery cell, the first connecting rib or the second connecting rib is the first location where tearing occurs, so as to reduce the probability of pulling between the electrical connector and the flexible circuit board.

[0034] In some embodiments, the first slot has a second slot end opposite to the first slot end, and the second slot end is straight; the second slot has a fourth slot end opposite to the third slot end, and the fourth slot end is straight.

[0035] By adopting the above technical solution, when the electrical connector is pulled due to the expansion of the battery cell, the flexible circuit board can be pulled and extended along the first groove toward the second groove end, or the flexible circuit board can also be pulled and extended along the second groove toward the fourth groove end to meet the displacement changes caused by the expansion of the battery cell.

[0036] In a second aspect, the present application provides an electrical device, comprising a battery device as described in any one of the above items, wherein the battery device is used to store or provide electrical energy.

[0037] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.

[0038] 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, it can be implemented in accordance with the contents of the specification. In order to make the above and 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

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0040] Figure 1 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application;

[0041] Figure 2 A schematic diagram of the structure of a battery device provided in an embodiment of the present application;

[0042] Figure 3 A partial schematic diagram of a battery device provided in an embodiment of the present application;

[0043] Figure 4 for Figure 3 The enlarged view of J in the middle;

[0044] Figure 5 for Figure 3 Enlarged view of K in the middle;

[0045] Figure 6 for Figure 3 Enlarged view of L in the middle.

[0046] Description of reference numerals:

[0047] 1000, vehicle; 100, battery device; 200, controller; 300, motor;

[0048] 10. Battery cell assembly; 11. Battery cell;

[0049] 20. Collection integrated component; 21. Flexible circuit board; 22. Electrical connector; 20a. First hollow structure; 20b. Second hollow structure; 20c. Third hollow structure; 22a. First side; 22b. Second side; 211. First connecting rib; 212. Second connecting rib; 20a1. First notch; 20a11. First trimming; 20a12. Second trimming; 20a13. Third trimming; 20b1. Second notch; 20b11. Fourth trimming; 20b12. Fifth trimming; 20b13. Sixth trimming; 20 a2, first through hole; 20a21, first hole wall; 20a22, second hole wall; 20b2, second through hole; 20b21, third hole wall; 20b22, fourth hole wall; 20c1, first slot; 20c11, first slot end; 20c12, second slot end; 20c2, third through hole; 213, third connecting rib; 20c3, fourth through hole; 20c4, fifth through hole; 214, fourth connecting rib; 215, fifth connecting rib; 20c5, second slot; 20c51, third slot end; 20c52, fourth slot end. DETAILED DESCRIPTION

[0050] The following embodiments of the technical solution of the present application will be 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 examples, and cannot be used to limit the scope of protection of the present application.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0055] 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).

[0056] 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 element 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.

[0057] 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 elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0058] In the relevant technical field, the Cell Connection System (CCS) is composed of brackets, copper-aluminum bars, FPC and other structural parts. Multiple battery cells are connected in series and parallel through the copper-aluminum bars on the Cell Connection System (CCS). A battery cell assembly is formed. At the same time, the FPC detects and monitors the voltage and temperature of the battery cells in real time, and transmits the collected signals to the battery management system to achieve overcurrent protection and thermal runaway management of the battery cell assembly.

[0059] After the battery device has been used for a certain period of time, the battery cell will expand and shift laterally, thereby causing the tin sheet between the current cell and the FPC to shift and offset, and even the tin sheet itself, the connection between the tin sheet and the FPC, or the connection between the tin sheet and the battery cell to tear or break.

[0060] In order to solve the above problems, a hollow structure is usually formed on the FPC to absorb the displacement changes caused by the expansion of the battery cells. However, the current hollow structure easily causes poor overall structural stability of the FPC, especially during the transportation of the battery cell assembly, the FPC has a certain probability of breaking.

[0061] In view of this, the present application provides a battery device, in which multiple hollow structures are formed on its collection integrated component. Specifically, a first hollow structure, a second hollow structure and a third hollow structure are provided on the flexible circuit board, and the electrical connector has two first sides arranged opposite to each other and a second side connected to the two first sides. The first hollow structure and the second hollow structure correspond to the two first sides of the electrical connector respectively, and the third hollow structure corresponds to the second side of the electrical connector. In addition, a first connecting rib is formed between the first hollow structure and the third hollow structure, and a second connecting rib is formed between the second hollow structure and the third hollow structure. In this way, connecting ribs are present on both sides (two first sides) of the electrical connector to form a stable connection mode, so as to reduce the tearing caused by the warping or folding of the flexible circuit board during the reprinting process of the battery device. At the same time, the pulling effect caused by the thermal expansion of each battery cell can be satisfied, that is, the fracture can occur at the first connecting rib or the second connection. The battery device provided in the embodiment of the present application has a higher strength of the flexible circuit board 21 in the collection integrated component and better anti-fracture performance.

[0062] Please refer to Figure 2The battery device 100 provided in the embodiment of the present application includes one or more battery cell assemblies 10. The battery device 100 disclosed in the embodiment of the present application can be used for electrical equipment that uses the battery device 100 as a power source or various energy storage devices and energy storage systems that use the battery device 100 as an energy storage element. Electrical equipment can be, but is not limited to, mobile phones, portable devices, laptops, electric toys, electric tools, battery cars, vehicles, ships, spacecraft, and the like. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0063] The battery device 100 may include one or more battery cells 11 for providing voltage and capacity. A plurality of battery cells 11 form a battery cell assembly 10, and the plurality of battery cells 11 are connected in series, in parallel, or in mixed connection through a busbar.

[0064] The battery device 100 may be a battery pack. The battery pack generally includes a case and one or more battery cell assemblies 10 . The battery cell assemblies 10 are accommodated in the case.

[0065] The battery device 100 further includes a box body 30, the box body 30 has a storage space inside, and a plurality of battery cells 11 are stored in the storage space. Figure 2 As shown, the box body 30 may include two parts, which are respectively referred to as the first part 31 and the second part 32. Please refer to Figures and Figures, which show a first part 31 of the box body 30. The first part 31 and the second part 32 may be connected by snapping, bonding, etc. to form a containing space. A plurality of battery cells 11 are connected in parallel, in series, or in a mixed combination and are placed in the box body formed by connecting the first part 31 and the second part 32. The shapes of the first part 31 and the second part 32 may be determined according to the shape formed by the combination of a plurality of battery cells 11.

[0066] 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.

[0067] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0068] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve 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.

[0069] According to some embodiments of this application, please refer to Figures 3 to 6 An embodiment of the present application provides a battery device 100 , including a battery cell assembly 10 and a collection integrated assembly 20 .

[0070] Specifically, the battery cell assembly 10 includes a plurality of battery cells 11 ; the collection integrated assembly 20 includes a flexible circuit board 21 and a plurality of electrical connectors 22 disposed on the flexible circuit board 21 , and each electrical connector 22 is used to be connected to a corresponding battery cell 11 .

[0071] Among them, the flexible circuit board 21 is provided with a first hollow structure 20a, a second hollow structure 20b and a third hollow structure 20c, the electrical connector 22 has two oppositely arranged first sides 22a and a second side 22b connected to the two first sides 22a, the first hollow structure 20a and the second hollow structure 20b respectively correspond to the two first sides 22a of the electrical connector 22, the third hollow structure 20c corresponds to the second side 22b of the electrical connector 22, and a first connecting rib 211 is formed between the first hollow structure 20a and the third hollow structure 20c, and a second connecting rib 212 is formed between the second hollow structure 20b and the third hollow structure 20c.

[0072] It can be understood that the acquisition integrated component 20 is used to detect and monitor the voltage and temperature of the battery cell 11 in real time, and transmit the acquisition signal to the battery management system to achieve overcurrent protection and thermal runaway management of the battery cell assembly 10. Among them, the electrical connector 22 transmits the voltage, temperature and other parameters of the corresponding battery cell 11 to the flexible circuit board 21 for data aggregation. Of course, the acquisition integrated component 20 should also include a bar, which is connected to the pole of the battery cell, and the electrical connector is electrically connected to the bar.

[0073] Since the expansion direction of the battery cells 11 is mainly concentrated in the direction of their large surfaces, that is, when the battery cells 11 are arranged along the large surface direction, once expansion occurs, a pulling force is generated at the connection between the battery cells 11 and the electrical connector 22 to pull the flexible circuit board 21.

[0074] Here, the electrical connector 22 is generally a rectangular structure, one end of the electrical connector 22 is welded to the battery cell 11, and the other end of the electrical connector 22 is welded to the flexible circuit board 21. The first side 22a is the long side of the electrical connector 22, and is also the left or right side of the electrical connector 22 on the flexible circuit board 21, and the second side 22b is the short side of the electrical connector 22, and the extension direction of the second side 22b can be arranged parallel to the edge of the flexible circuit board 21. Therefore, once the battery cell 11 expands, one of the first sides 22a of the electrical connector 22 should be subjected to the pulling force, and the pulling force then pulls the flexible circuit board 21 at the connection between the electrical connector 22 and the flexible circuit board 21, that is, a tearing force is formed on the flexible circuit board 21.

[0075] Each hollow structure is a hole structure, a groove structure, and a structure of the two formed on the flexible circuit board 21. In this way, the first hollow structure 20a and the second hollow structure 20b are located at the two first sides 22a of the electrical connector 22, that is, corresponding hollow structures are formed on the left and right sides of the electrical connector 22, and the third hollow structure 20c is located on the second side 22b of the electrical connector 22, and a first connecting rib 211 is formed between the first hollow structure 20a and the third hollow structure 20c, and a second connecting rib 212 is formed between the second hollow structure 20b and the third hollow structure 20c. Here, the connecting rib The physical structure is formed after punching the flexible circuit board 21, wherein the first connecting rib 211 and the second connecting rib 212 are respectively located on the left and right sides of the electrical connection. Once the battery cell 11 expands, the first connecting rib 211 or the second connecting rib 212 is subjected to a corresponding pulling force to achieve deformation of the flexible circuit board 21 to absorb the change in force caused by the expansion. In fact, the first connecting rib 211 or the second connecting rib 212 is a preferred breaking point to improve the integrity of the electrical connector 22 when the battery cell 11 expands, the stability of the electrical connection with the battery cell 11, and the stability of the electrical connection with the flexible circuit board 21.

[0076] The battery device 100 provided in the embodiment of the present application has a corresponding hollow design for the flexible circuit board 21 of the integrated component 20. Specifically, the two first sides 22a of the electrical connector 22 are respectively provided with a first hollow structure 20a and a second hollow structure 20b, and the third hollow structure 20c is provided on the second side 22b of the electrical connector 22. In addition, a first connecting rib 211 is formed between the first hollow structure 20a and the third hollow structure 20c, and a second connecting rib 212 is formed between the second hollow structure 20b and the third hollow structure 20c. In this way, connecting ribs are present on both sides (the two first sides 22a) of the electrical connector 22 to form a stable connection method, so as to reduce the tearing caused by the warping or folding of the flexible circuit board 21 during the reprinting process of the battery device 100. At the same time, the pulling effect caused by the thermal expansion of each battery cell 11 can be satisfied, that is, a break may occur at the first connecting rib 211 or the second connection. The battery device 100 provided in the embodiment of the present application has a higher strength and better anti-fracture performance in the flexible circuit board 21 in the collection integrated component 20.

[0077] Please refer to Figure 4 In some embodiments, the first hollow structure 20 a includes a first notch 20 a 1 formed by an inward depression of an edge of the flexible circuit board 21 .

[0078] It can be understood that the first notch 20a1 is an open hollow structure, and the first notch 20a1 can be connected to the outside.

[0079] When subjected to a pulling force caused by expansion, the first notch 20a1 can meet the requirement of stress change, so that stress concentration occurs at the first notch 20a1 of the flexible circuit board 21 and deformation occurs.

[0080] Here, the shape of the first notch 20a1 includes but is not limited to a semicircular shape, a strip shape, etc.

[0081] In this way, the first notch 20 a 1 can meet the pulling requirement of the corresponding battery cell 11 on the flexible circuit board 21 after expansion, so as to absorb the displacement change caused by the expansion of the battery cell 11 .

[0082] Please refer to Figure 4 In some embodiments, the first notch 20a1 has a first cut edge 20a11, a second cut edge 20a12 arranged opposite to the first cut edge 20a11, and a third cut edge 20a13 connecting the first cut edge 20a11 and the second cut edge 20a12, and the extension direction of the third cut edge 20a13 forms an angle a with the extension direction of the first cut edge 20a11, and a is an acute angle.

[0083] It can be understood that the extension direction of the third cutting edge 20a13 forms an acute angle with the extension direction of the first cutting edge 20a11, so that stress concentration is formed at the connection between the third cutting edge 20a13 and the first cutting edge 20a11, and when the pulling force formed by the expansion is too large, tearing occurs at the connection.

[0084] At the same time, in order to ensure that a tearing phenomenon can occur at the connection between the third cutting edge 20a13 and the first cutting edge 20a11, the third cutting edge 20a13 should be inclined toward the electrical connector 22 side.

[0085] Thus, when the electrical connector 22 is pulled due to the expansion of the battery cell 11 , the connection between the first cutting edge 20a11 and the third cutting edge 20a13 of the first notch 20a1 is the first location where tearing occurs, thereby reducing the probability of pulling between the electrical connector 22 and the flexible circuit board 21 .

[0086] Please refer to Figure 6 In some embodiments, the second hollow structure 20 b includes a second notch 20 b 1 formed by an inward depression of an edge of the flexible circuit board 21 .

[0087] It can be understood that the second notch 20b1 is also an open hollow structure, and the second notch 20b1 can be connected to the outside.

[0088] When subjected to a pulling force caused by expansion, the second notch 20b1 can meet the requirement of stress change, so that stress concentration occurs at the second notch 20b1 of the flexible circuit board 21 and deformation occurs.

[0089] Here, the shape of the second notch 20b1 includes but is not limited to a semicircular shape, a bar shape, and the like.

[0090] Likewise, the second notch 20 b 1 can meet the pulling requirement of the corresponding battery cell 11 on the flexible circuit board 21 after expansion, so as to absorb the displacement change caused by the expansion of the battery cell 11 .

[0091] Please refer to Figure 6 In some embodiments, the second notch 20b1 has a fourth cut edge 20b11, a fifth cut edge 20b12 arranged opposite to the fourth cut edge 20b11, and a sixth cut edge 20b13 connecting the fourth cut edge 20b11 and the fifth cut edge 20b12, and the extension direction of the sixth cut edge 20b13 forms an angle b with the extension direction of the fourth cut edge 20b11, and b is an acute angle.

[0092] It can be understood that the extension direction of the sixth cutting edge 20b13 forms an acute angle with the extension direction of the fourth cutting edge 20b11, so that stress concentration is formed at the connection between the sixth cutting edge 20b13 and the fourth cutting edge 20b11, and when the pulling force formed by the expansion is too large, tearing occurs at the connection.

[0093] At the same time, in order to ensure that a tearing phenomenon can occur at the connection between the sixth cutting edge 20b13 and the third cutting edge 20a13, the sixth cutting edge 20b13 should be inclined toward the electrical connector 22.

[0094] Similarly, when the electrical connector 22 is pulled due to the expansion of the battery cell 11 , the connection between the third cutting edge 20a13 and the sixth cutting edge 20b13 of the second notch 20b1 is the first location where tearing occurs, thereby reducing the probability of pulling between the electrical connector 22 and the flexible circuit board 21 .

[0095] Please refer to Figure 5 In some embodiments, the first hollow structure 20a includes a first through hole 20a2 formed on the flexible circuit board 21 and in a closed state.

[0096] It can be understood that the first through hole 20a2 is a closed hollow structure formed on the flexible circuit board 21, and the first through hole 20a2 is not connected to the outside, that is, the through hole structure is formed on the flexible circuit board 21 by stamping or punching.

[0097] At the same time, since part of the flexible circuit board 21 is removed, the degree of deformation of the flexible circuit board 21 near the first through hole 20a2 is increased to meet the deformation requirement of the pulling force due to the expansion.

[0098] Here, the outer shape of the first through hole 20a2 includes but is not limited to a circle, a strip, etc.

[0099] In this way, the first through hole 20 a 2 can also meet the pulling requirement of the corresponding battery cell 11 on the flexible circuit board 21 after expansion, so as to absorb the displacement change caused by the expansion of the battery cell 11 .

[0100] Please refer to Figure 5 In some embodiments, the first through hole 20a2 has a first hole wall 20a21 in a straight state and a second hole wall 20a22 in an arc-shaped state, the first hole wall 20a21 is connected to the second hole wall 20a22, and the distance between the first hole wall 20a21 and the edge of the flexible circuit board 21 is M, 0.8mm≤M≤1.0mm.

[0101] It can be understood that the first hole wall 20a21 and the second hole wall 20a22 are combined to form a closed first through hole 20a2, and the first hole wall 20a21 is closer to the edge of the flexible circuit board 21. Here, the extension direction of the first hole wall 20a21 is parallel or substantially parallel to the edge of the flexible circuit board 21. Once expansion occurs, the area between the first hole wall 20a21 and the edge of the flexible circuit board 21 is deformed first to absorb the impact caused by the pulling force. In addition, the M size is also limited to meet the corresponding deformation requirements. At the same time, when the pulling force is too large, the area between the first hole wall 20a21 and the edge of the flexible circuit board 21 may also be torn or broken to improve the connection stability of the electrical connector 22.

[0102] Optionally, the value of M can be 0.8mm, 0.81mm, 0.82mm, 0.83mm, 0.84mm, 0.85mm, 0.86mm, 0.87mm, 0.88mm, 0.89mm, 0.90mm, 0.91mm, 0.92mm, 0.93mm, 0.94mm, 0.95mm, 0.96mm, 0.97mm, 0.98mm, 0.99mm, or 1.0mm.

[0103] Thus, when the electrical connector 22 is pulled due to the expansion of the battery cell 11, the rib formed between the first hole wall 20a21 and the edge of the flexible circuit board 21 is the first location to break, thereby reducing the probability of pulling between the electrical connector 22 and the flexible circuit board 21.

[0104] Please refer to Figure 4 In some embodiments, the second hollow structure 20 b includes a second through hole 20 b 2 formed on the flexible circuit board 21 and in a closed state.

[0105] It can be understood that the second through hole 20b2 is a closed hollow structure formed on the flexible circuit board 21, and the second through hole 20b2 is not connected to the outside, that is, the through hole structure is formed on the flexible circuit board 21 by stamping or punching.

[0106] At the same time, since part of the flexible circuit board 21 is removed, the degree of deformation of the flexible circuit board 21 near the second through hole 20b2 is increased to meet the deformation requirement of the pulling force due to the expansion.

[0107] Here, the outer shape of the second through hole 20b2 includes but is not limited to a circle, a bar, etc.

[0108] Likewise, the second through hole 20 b 2 can also meet the pulling requirement of the corresponding battery cell 11 on the flexible circuit board 21 after expansion, so as to absorb the displacement change caused by the expansion of the battery cell 11 .

[0109] Please refer to Figure 4 In some embodiments, the second through hole 20b2 has a third hole wall 20b21 in a straight state and a fourth hole wall 20b22 in an arc-shaped state, the third hole wall 20b21 and the fourth hole wall 20b22 are connected, and the distance between the third hole wall 20b21 and the edge side of the flexible circuit board 21 is N, 0.8mm≤N≤1.0mm.

[0110] It can be understood that the third hole wall 20b21 and the fourth hole wall 20b22 are combined to form a closed second through hole 20b2, and the third hole wall 20b21 is closer to the edge of the flexible circuit board 21. Here, the extension direction of the third hole wall 20b21 is parallel or substantially parallel to the edge of the flexible circuit board 21. Once expansion occurs, the area between the third hole wall 20b21 and the edge of the flexible circuit board 21 is deformed first to absorb the impact caused by the pulling force. In addition, the N size is also limited to meet the corresponding deformation requirements. At the same time, when the pulling force is too large, the area between the first hole wall 20a21 and the edge of the flexible circuit board 21 may also be torn or broken to improve the connection stability of the electrical connector 22.

[0111] Optionally, the value of N can be 0.8mm, 0.81mm, 0.82mm, 0.83mm, 0.84mm, 0.85mm, 0.86mm, 0.87mm, 0.88mm, 0.89mm, 0.90mm, 0.91mm, 0.92mm, 0.93mm, 0.94mm, 0.95mm, 0.96mm, 0.97mm, 0.98mm, 0.99mm, or 1.0mm.

[0112] Similarly, when the electrical connector 22 is pulled due to the expansion of the battery cell 11, the rib formed between the third hole wall 20b21 and the edge of the flexible circuit board 21 is the first location to break, thereby reducing the probability of pulling between the electrical connector 22 and the flexible circuit board 21.

[0113] Please refer to Figure 4 In some embodiments, the third hollow structure 20c includes a first slot 20c1 formed on the flexible circuit board 21, and the first slot 20c1 has a first slot end 20c11; the first slot end 20c11 extends to the first hollow structure 20a and forms a first connecting rib 211 with the first hollow structure 20a.

[0114] It can be understood that the first slot 20c1 is also a closed hollow structure formed on the flexible circuit board 21, and the structural characteristic of the first slot 20c1 is that its length is greater than or much greater than its width to form a "long and narrow" structural characteristic. The first slot end 20c11 is one of the closed ends of the first slot 20c1.

[0115] Once expansion occurs, the first connecting rib 211 absorbs the impact caused by the pulling force, and when the pulling force is too large, the first connecting rib 211 breaks. Then, the part of the flexible circuit board 21 connected to the electrical connector 22 is pulled and moved with a larger displacement under the guidance of the first groove 20c1, thereby further improving the connection stability between the electrical connector 22 and the battery cell 11; and the connection stability between the electrical connector 22 and the flexible circuit board 21.

[0116] In this way, when the electrical connector 22 is pulled due to the expansion of the battery cell 11 , the first connecting rib 211 is the first location where tearing occurs, so as to reduce the probability of pulling between the electrical connector 22 and the flexible circuit board 21 .

[0117] Please refer to Figure 4 In some embodiments, the third hollow structure 20c also includes a third through hole 20c2 formed on the flexible circuit board 21, the first slot 20c1 has a second slot end 20c12 opposite to the first slot end 20c11, the second slot end 20c12 is in a straight state, the third through hole 20c2 is arranged corresponding to the second slot end 20c12, and a third connecting rib 213 is formed between the third through hole 20c2 and the second slot end 20c12, the width of the third connecting rib 213 is A, 0.8mm≤A≤1.0mm, and the third through hole 20c2 corresponds to the second hollow structure 20b to form a second connecting rib 212.

[0118] It can be understood that the second groove end 20c12 is another closed end of the first groove 20c1, corresponding to the first groove end 20c11. The second groove end 20c12 is in a straight state, which means that the second groove end 20c12 does not extend in the direction of the second hollow structure 20b, but remains parallel or approximately parallel to the edge of the flexible circuit board 21.

[0119] The third through hole 20c2 is a hollow structure in a closed state in the third hollow structure 20c, and the third through hole 20c2 is not connected to the outside, that is, the through hole structure is formed on the flexible circuit board 21 by stamping or punching.

[0120] The third connecting rib 213 is a solid structure formed between the third through hole 20c2 and the second groove end 20c12. When subjected to a pulling force due to expansion, the third connecting rib 213 is easily deformed. Moreover, when the pulling force is too large, the third connecting rib 213 may also break to absorb the impact caused by the pulling force.

[0121] Optionally, the value of A can be 0.8mm, 0.81mm, 0.82mm, 0.83mm, 0.84mm, 0.85mm, 0.86mm, 0.87mm, 0.88mm, 0.89mm, 0.90mm, 0.91mm, 0.92mm, 0.93mm, 0.94mm, 0.95mm, 0.96mm, 0.97mm, 0.98mm, 0.99mm, or 1.0mm.

[0122] In this way, when the electrical connector 22 is pulled due to the expansion of the battery cell 11 , the third connecting rib 213 and the second connecting rib 212 may be broken to reduce the probability of pulling between the electrical connector 22 and the flexible circuit board 21 .

[0123] Please refer to Figure 5In some embodiments, the third hollow structure 20c includes a first slot 20c1, a fourth through hole 20c3, and a fifth through hole 20c4 formed on the flexible circuit board 21, the first slot 20c1 has a first slot end 20c11 and a second slot end 20c12, the first slot end 20c11 and the second slot end 20c12 are both in a straight state, the fourth through hole 20c3 is arranged corresponding to the first slot end 20c11, and a fourth connecting rib 214 is formed between the fourth through hole 20c3 and the first slot end 20c11, and the fourth connecting rib The width of 214 is B, 0.8mm≤B≤1.0mm, and the fourth through hole 20c3 corresponds to the first hollow structure 20a to form a first connecting rib 211, the fifth through hole 20c4 is arranged corresponding to the second slot end 20c12, and a fifth connecting rib 215 is formed between the fifth through hole 20c4 and the second slot end 20c12, the width of the fifth connecting rib 215 is C, 0.8mm≤C≤1.0mm, and the fifth through hole 20c4 corresponds to the second hollow structure 20b to form a second connecting rib 212.

[0124] It can be understood that the fourth through hole 20c3 and the fifth through hole 20c4 are both hollow structures in a closed state in the third hollow structure 20c, and the fourth through hole 20c3 and the fifth through hole 20c4 are not connected to the outside, that is, the through hole structure is formed on the flexible circuit board 21 by stamping or punching.

[0125] Similarly, the fourth connecting rib 214 and the fifth connecting rib 215 are solid structures formed between the fourth through hole 20c3 and the first slot 20c1 and between the fifth through hole 20c4 and the first slot 20c1, respectively. When subjected to a pulling force due to expansion, the fourth connecting rib 214 or the fifth connecting rib 215 is easily deformed, and when the pulling force is too large, the fourth connecting rib 214 or the fifth connecting rib 215 may also break to absorb the impact caused by the pulling force.

[0126] Optionally, the value of B can be 0.8mm, 0.81mm, 0.82mm, 0.83mm, 0.84mm, 0.85mm, 0.86mm, 0.87mm, 0.88mm, 0.89mm, 0.90mm, 0.91mm, 0.92mm, 0.93mm, 0.94mm, 0.95mm, 0.96mm, 0.97mm, 0.98mm, 0.99mm, or 1.0mm.

[0127] Optionally, the value of C can be 0.8mm, 0.81mm, 0.82mm, 0.83mm, 0.84mm, 0.85mm, 0.86mm, 0.87mm, 0.88mm, 0.89mm, 0.90mm, 0.91mm, 0.92mm, 0.93mm, 0.94mm, 0.95mm, 0.96mm, 0.97mm, 0.98mm, 0.99mm, or 1.0mm.

[0128] Thus, when the electrical connector 22 is pulled due to the expansion of the battery cell 11 , the first connecting rib 211 , the second connecting rib 212 , the fourth connecting rib 214 and the fifth connecting rib 215 may all be broken to reduce the probability of pulling between the electrical connector 22 and the flexible circuit board 21 .

[0129] Please refer to Figure 6 In some embodiments, the third hollow structure 20c includes a first slot 20c1 and a second slot 20c5 formed on the flexible circuit board 21 and arranged in an alternating manner. The first slot 20c1 has a first slot end 20c11, which extends to the first hollow structure 20a and forms a first connecting rib 211 with the first hollow structure 20a. The second slot 20c5 has a third slot end 20c51, which extends to the second hollow structure 20b and forms a second connecting rib 212 with the second hollow structure 20b.

[0130] It can be understood that the first slot 20c1 and the second slot 20c5 are both closed hollow structures formed on the flexible circuit board 21, and the structural characteristic of the slot is that its length is greater than or much greater than its width to form a "long and narrow" structural characteristic. The first slot end 20c11 is one of the closed ends of the first slot 20c1, and the third slot end 20c51 is one of the closed ends of the second slot 20c5.

[0131] Once expansion occurs, the first connecting rib 211 or the second connecting rib 212 absorbs the impact caused by the pulling force, and when the pulling force is too large, the first connecting rib 211 or the second connecting rib 212 breaks, and then, the part of the flexible circuit board 21 connected to the electrical connector 22 is pulled and moved with a larger displacement under the guidance of the first groove 20c1 or the second groove 20c5, further improving the connection stability between the electrical connector 22 and the battery cell 11; and, the connection stability between the electrical connector 22 and the flexible circuit board 21.

[0132] In this way, when the electrical connector 22 is pulled due to the expansion of the battery cell 11 , the first connecting rib 211 or the second connecting point is the first location where tearing occurs, so as to reduce the probability of pulling between the electrical connector 22 and the flexible circuit board 21 .

[0133] Please refer to Figure 6 In some embodiments, the first slot 20c1 has a second slot end 20c12 opposite to the first slot end 20c11, and the second slot end 20c12 is straight; the second slot 20c5 has a fourth slot end 20c52 opposite to the third slot end 20c51, and the fourth slot end 20c52 is straight.

[0134] It can be understood that the second slot end 20c12 is the other closed end of the first slot 20c1, and the fourth slot end 20c52 is the other closed end of the second slot 20c5.

[0135] The second groove end 20c12 being straight means that the second groove end 20c12 does not extend toward the second hollow structure 20b, but remains parallel or approximately parallel to the edge of the flexible circuit board 21. Similarly, the fourth groove end 20c52 is also straight.

[0136] In this way, when the electrical connector 22 is pulled due to the expansion of the battery cell 11, the flexible circuit board 21 can be pulled and extended along the first groove 20c1 to the second groove end 20c12, or the flexible circuit board 21 can also be pulled and extended along the second groove 20c5 to the fourth groove end 20c52 to meet the displacement changes caused by the expansion of the battery cell 11.

[0137] Please refer to Figure 4 In a specific embodiment, the battery device 100 provided in the embodiment of the present application includes a battery cell assembly 10 and a collection integrated assembly 20 .

[0138] The battery cell assembly 10 includes a plurality of battery cells 11 ; the collection integrated assembly 20 includes a flexible circuit board 21 and a plurality of electrical connectors 22 disposed on the flexible circuit board 21 , and each electrical connector 22 is used to be connected to a corresponding battery cell 11 .

[0139] The first hollow structure 20a includes a first notch 20a1 formed by the inward depression of the edge of the flexible circuit board 21, the first notch 20a1 has a first cut edge 20a11, a second cut edge 20a12 arranged opposite to the first cut edge 20a11, and a third cut edge 20a13 connecting the first cut edge 20a11 and the second cut edge 20a12, the extension direction of the third cut edge 20a13 forms an angle a with the extension direction of the first cut edge 20a11, and a is an acute angle.

[0140] The second hollow structure 20b includes a second through hole 20b2 formed on the flexible circuit board 21 and is closed. The second through hole 20b2 has a third hole wall 20b21 in a straight state and a fourth hole wall 20b22 in an arc-shaped state. The third hole wall 20b21 and the fourth hole wall 20b22 are connected. The distance between the third hole wall 20b21 and the edge side of the flexible circuit board 21 is N, 0.8mm≤N≤1.0mm.

[0141] The third hollow structure 20c includes a first slot 20c1 formed on the flexible circuit board 21 and a third through hole 20c2 formed on the flexible circuit board 21, the first slot 20c1 has a first slot end 20c11 and a second slot end 20c12 opposite to the first slot end 20c11; the first slot end 20c11 extends to the first hollow structure 20a and forms a first connecting rib 211 with the first notch 20a1, the second slot end 20c12 is in a straight state, the third through hole 20c2 is arranged corresponding to the second slot end 20c12, and a third connecting rib 213 is formed between the third through hole 20c2 and the second slot end 20c12, the width of the third connecting rib 213 is A, 0.8mm≤A≤1.0mm, and the third through hole 20c2 corresponds to the second through hole 20b2 to form a second connecting rib 212.

[0142] Please refer to Figure 6 In a specific embodiment, the battery device 100 provided in the embodiment of the present application includes a battery cell assembly 10 and a collection integrated assembly 20 .

[0143] The battery cell assembly 10 includes a plurality of battery cells 11 ; the collection integrated assembly 20 includes a flexible circuit board 21 and a plurality of electrical connectors 22 disposed on the flexible circuit board 21 , and each electrical connector 22 is used to be connected to a corresponding battery cell 11 .

[0144] The first hollow structure 20a includes a first notch 20a1 formed by the inward depression of the edge of the flexible circuit board 21, the first notch 20a1 has a first cut edge 20a11, a second cut edge 20a12 arranged opposite to the first cut edge 20a11, and a third cut edge 20a13 connecting the first cut edge 20a11 and the second cut edge 20a12, the extension direction of the third cut edge 20a13 forms an angle a with the extension direction of the first cut edge 20a11, and a is an acute angle.

[0145] The second hollow structure 20b includes a second notch 20b1 formed by the inward depression of the edge of the flexible circuit board 21, the second notch 20b1 has a fourth cut edge 20b11, a fifth cut edge 20b12 arranged opposite to the fourth cut edge 20b11, and a sixth cut edge 20b13 connecting the fourth cut edge 20b11 and the fifth cut edge 20b12, the extension direction of the sixth cut edge 20b13 forms an angle b with the extension direction of the fourth cut edge 20b11, and b is an acute angle.

[0146] The third hollow structure 20c includes a first slot 20c1 and a second slot 20c5 formed on the flexible circuit board 21 and arranged in a staggered manner. The first slot 20c1 has a first slot end 20c11, which extends to the first notch 20a1 and forms a first connecting rib 211 with the first hollow structure 20a. The second slot 20c5 has a third slot end 20c51, which extends to the second notch 20b1 and forms a second connecting rib 212 with the second hollow structure 20b. The first slot 20c1 has a second slot end 20c12 opposite to the first slot end 20c11, and the second slot end 20c12 is in a straight state; the second slot 20c5 has a fourth slot end 20c52 opposite to the third slot end 20c51, and the fourth slot end 20c52 is in a straight state.

[0147] According to some embodiments of the present application, referring to Figure 1 As shown, the present application further provides an electrical device, which includes the battery device 100 in the above embodiment, and the battery device 100 is used to store or provide electrical energy.

[0148] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using the battery device 100, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles 1000, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0149] The example of the electrical equipment in the present application is based on the example of the battery device 100 described above. The example of the electrical equipment includes all the technical effects of the example of the battery device 100 described above, which will not be described in detail.

[0150] The above are only preferred embodiments of the present application, and only specifically describe the technical principles of the present application. These descriptions are only for explaining the principles of the present application and cannot be interpreted as limiting the scope of protection of the present application in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application, and other specific implementation methods of the present application that can be associated with the technicians in this field without creative work, should be included in the scope of protection of the present application.

Claims

1. A battery device, characterized in that: include: A battery cell assembly, wherein the battery cell assembly includes a plurality of battery cells; A collection integrated component, the collection integrated component comprising a flexible circuit board and a plurality of electrical connectors disposed on the flexible circuit board, each of the electrical connectors being used to connect to a corresponding battery cell; Among them, the flexible circuit board is provided with a first hollow structure, a second hollow structure and a third hollow structure, the electrical connector has two oppositely arranged first sides and a second side connected to the two first sides, the first hollow structure and the second hollow structure respectively correspond to the two first sides of the electrical connector, the third hollow structure corresponds to the second side of the electrical connector, and a first connecting rib is formed between the first hollow structure and the third hollow structure, and a second connecting rib is formed between the second hollow structure and the third hollow structure.

2. The battery device according to claim 1, wherein: The first hollow structure includes a first notch formed by an inward depression of an edge side of the flexible circuit board.

3. The battery device according to claim 2, characterized in that: The first notch has a first cutting edge, a second cutting edge arranged opposite to the first cutting edge, and a third cutting edge connecting the first cutting edge and the second cutting edge. The extension direction of the third cutting edge forms an angle a with the extension direction of the first cutting edge, and a is an acute angle.

4. The battery device according to claim 1, wherein: The second hollow structure includes a second notch formed by an inward depression of an edge side of the flexible circuit board.

5. The battery device according to claim 4, characterized in that: The second notch has a fourth cutting edge, a fifth cutting edge arranged opposite to the fourth cutting edge, and a sixth cutting edge connecting the fourth cutting edge and the fifth cutting edge, and an extension direction of the sixth cutting edge forms an angle b with an extension direction of the fourth cutting edge, and b is an acute angle.

6. The battery device according to claim 1, wherein: The first hollow structure includes a first closed through hole formed on the flexible circuit board.

7. The battery device according to claim 6, characterized in that: The first through hole has a straight first hole wall and an arc-shaped second hole wall, the first hole wall is connected to the second hole wall, and the distance between the first hole wall and the edge of the flexible circuit board is M, 0.8mm≤M≤1.0mm.

8. The battery device according to claim 1, wherein: The second hollow structure includes a second through hole formed on the flexible circuit board and in a closed state.

9. The battery device according to claim 8, characterized in that: The second through hole has a third hole wall in a straight state and a fourth hole wall in an arc state, the third hole wall and the fourth hole wall are connected, and the distance between the third hole wall and the edge side of the flexible circuit board is N, 0.8mm≤N≤1.0mm.

10. The battery device according to claim 1, wherein: The third hollow structure includes a first slot formed on the flexible circuit board, wherein the first slot has a first slot end; the first slot end extends to the first hollow structure and forms the first connecting rib with the first hollow structure.

11. The battery device according to claim 10, characterized in that: The third hollow structure also includes a third through hole formed on the flexible circuit board, the first slot has a second slot end opposite to the first slot end, the second slot end is in a straight state, the third through hole is arranged corresponding to the second slot end, and a third connecting rib is formed between the third through hole and the second slot end, the width of the third connecting rib is A, 0.8mm≤A≤1.0mm, and the third through hole corresponds to the second hollow structure to form the second connecting rib.

12. The battery device according to claim 1, wherein: The third hollow structure includes a first slot, a fourth through hole and a fifth through hole formed on the flexible circuit board, the first slot having a first slot end and a second slot end, the first slot end and the second slot end are both in a straight state, the fourth through hole is arranged corresponding to the first slot end, and a fourth connecting rib is formed between the fourth through hole and the first slot end, the width of the fourth connecting rib is B, 0.8mm≤B≤1.0mm, and the fourth through hole corresponds to the first hollow structure to form the first connecting rib, the fifth through hole is arranged corresponding to the second slot end, and a fifth connecting rib is formed between the fifth through hole and the second slot end, the width of the fifth connecting rib is C, 0.8mm≤C≤1.0mm, and the fifth through hole corresponds to the second hollow structure to form the second connecting rib.

13. The battery device according to claim 1, wherein: The third hollow structure includes a first slot and a second slot formed on the flexible circuit board and arranged in an alternating manner, the first slot having a first slot end, the first slot end extending to the first hollow structure and forming the first connecting rib with the first hollow structure, the second slot having a third slot end, the third slot end extending to the second hollow structure and forming the second connecting rib with the second hollow structure.

14. The battery device according to claim 13, wherein: The first slot has a second slot end opposite to the first slot end, and the second slot end is in a straight state; the second slot has a fourth slot end opposite to the third slot end, and the fourth slot end is in a straight state.

15. An electrical equipment, characterized in that: Comprising the battery device according to any one of claims 1 to 14.

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