Battery management module, battery module and electronic device

Abstract

The application relates to a battery management module, a battery module and an electronic device, the battery management module comprising: a first printed circuit board provided with electronic components; a second printed circuit board provided with a battery pack interface configured to be connected with a battery pack; a first flexible circuit board connecting the battery pack interface and the electronic components; wherein the first printed circuit board and the second printed circuit board are arranged in an overlapping manner. According to the application, the battery pack interface and the electronic components are arranged on different printed circuit boards respectively, and the electronic components and the battery pack interface are connected through the first flexible circuit board, and meanwhile, the first printed circuit board and the second printed circuit board are arranged in an overlapping manner, so that the size of the battery management module can be greatly reduced, and the compact development trend of the electronic device is facilitated.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery management module, a battery module, and an electronic device. Background Technology

[0002] Batteries are widely used in various industries, such as mobile phones, computers, and electronic atomizers. Typically, battery modules are equipped with a battery management module, which monitors internal operating parameters such as charging voltage, current, temperature, and discharging current to ensure the normal operation of the battery module.

[0003] The battery management module in existing battery modules typically includes a printed circuit board with electronic components and a battery pack interface for connecting the electronic components and the battery pack.

[0004] However, with the development of compact electronic devices, the aforementioned battery modules cannot meet the requirements of compact development due to their large size. Utility Model Content

[0005] This application provides a battery management module, a battery module, and an electronic device to meet the needs of the compact development of electronic devices, thereby at least partially solving the above-mentioned technical problems.

[0006] To achieve the above objectives, according to a first aspect of this application, a battery management module is provided, the battery management module comprising:

[0007] The first printed circuit board contains electronic components;

[0008] The second printed circuit board is provided with a battery pack interface, which is configured to connect to a battery pack;

[0009] A first flexible circuit board connects the battery pack interface and the electronic components;

[0010] The first printed circuit board and the second printed circuit board are arranged overlappingly.

[0011] Optionally, the battery management module further includes:

[0012] The third printed circuit board is equipped with terminal interfaces;

[0013] A second flexible circuit board connects the terminal interface and the electronic components;

[0014] The first printed circuit board, the second printed circuit board, and the third printed circuit board are arranged in an overlapping manner.

[0015] Optionally, the second printed circuit board is located between the first printed circuit board and the third printed circuit board.

[0016] Optionally, the battery management module further includes an electromagnetic shielding component disposed between the second printed circuit board and the third printed circuit board.

[0017] Optionally, the electromagnetic shielding component is a ferrite sheet.

[0018] Optionally, the terminal interface may be a plurality of contact pieces, a plurality of metal pieces, or a plurality of gold plating layers.

[0019] Optionally, the battery management module further includes a buffer component disposed between the first printed circuit board and the second printed circuit board.

[0020] Optionally, the battery pack interface includes at least two metal tabs fixed to the second printed circuit board.

[0021] Optionally, each of the metal sheets has at least one crease.

[0022] Optionally, the battery pack interface includes four metal plates, each of which has two creases.

[0023] Optionally, the battery pack interface further includes a first insulating element disposed between at least two of the metal sheets.

[0024] Optionally, the battery pack interface includes four metal plates, and the battery pack interface further includes a first insulating member disposed between the four metal plates.

[0025] Optionally, the first insulating element is cross-shaped.

[0026] Optionally, the first insulating element is a rigid insulating sheet.

[0027] Optionally, there are multiple electronic components, which are respectively disposed on opposite sides of the first printed circuit board.

[0028] According to a second aspect of this application, a battery module is provided, the battery module including the aforementioned battery management module;

[0029] case;

[0030] A battery pack is disposed inside the housing and connected to the battery pack interface.

[0031] Optionally, the battery pack includes at least one battery cell, and at least one of the battery cells is connected to the battery pack interface.

[0032] Optionally, the battery pack includes two cells arranged side by side, and the two cells are connected to the battery pack interface.

[0033] Optionally, a first adhesive is provided between the two cells.

[0034] Optionally, the housing is a metal housing;

[0035] The battery module also includes a second insulating component, which is disposed within the battery pack and the housing.

[0036] Optionally, a second adhesive is provided between the battery pack and the housing and the second insulating member.

[0037] Optionally, the housing has an opening on one side, and the battery pack uses pouch cells.

[0038] Optionally, the battery module further includes a protective film covering the outer surface of the housing.

[0039] Optionally, the protective film is provided with a tail strip.

[0040] Optionally, the battery pack is a pouch cell, one end of which is provided with a sealing groove, and the battery management module is fitted into the sealing groove.

[0041] Optionally, the battery module further includes a third insulating component disposed between the battery pack and the battery management module.

[0042] Optionally, the third insulating element is insulating paper.

[0043] Optionally, the battery module further includes a top cover plate, which is disposed on the battery management module and fixed to the housing.

[0044] Optionally, the battery module further includes a side cover, which is disposed on one side of the battery management module and fixed to the top cover and the housing.

[0045] Optionally, the side cover plate and the top cover plate, the top cover plate and the housing, and the side cover plate and the housing are snap-fit ​​connected.

[0046] According to a third aspect of this application, an electronic device is provided, the electronic device including the battery management module or the battery module.

[0047] Optionally, the electronic device is an electronic atomizer.

[0048] This embodiment of the application sets up a first printed circuit board and a second printed circuit board. The electronic components are set on the first printed circuit board, and the battery pack interface is set on the second printed circuit board. That is, the battery pack interface and the electronic components are set on different printed circuit boards, and the electronic components and the battery pack interface are connected by a first flexible circuit board. At the same time, the first printed circuit board and the second printed circuit board are overlapped. This can greatly reduce the size of the battery management module, which is conducive to the development trend of compact electronic devices. It avoids the problem of setting the electronic components and the battery pack interface on the same printed circuit board at the same time, which would result in an excessively large printed circuit board size and fail to meet the needs of compact electronic devices.

[0049] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0051] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0052] Figure 1 This is a schematic diagram of the overall structure of a battery management module provided in an exemplary embodiment of this application;

[0053] Figure 2 yes Figure 1 Exploded view of the battery management module in the image;

[0054] Figure 3 yes Figure 1 A cross-sectional view of the battery management module in the diagram;

[0055] Figure 4 yes Figure 1 A schematic diagram of the unfolded battery pack interface of the battery management module in the diagram;

[0056] Figure 5 yes Figure 4 Another structural diagram of the battery management module in the diagram;

[0057] Figure 6 yes Figure 4 A schematic diagram of the battery management module after removing the third printed circuit board;

[0058] Figure 7 yes Figure 6 A schematic diagram of the battery management module after removing the second printed circuit board;

[0059] Figure 8 This is a schematic diagram of the overall structure of a battery module provided in the exemplary embodiment two of this application;

[0060] Figure 9 yes Figure 8 An exploded view of the battery module.

[0061] Explanation of reference numerals in the attached figures:

[0062] 100. Battery Management Module;

[0063] 11. First printed circuit board; 111. Electronic component; 12. Second printed circuit board; 121. Battery pack interface; 122. Metal sheet; 123. Crease; 13. Third printed circuit board; 131. Terminal interface;

[0064] 21. First flexible circuit board; 22. Second flexible circuit board;

[0065] 31. Electromagnetic shielding component; 32. Buffer component; 33. First insulating component;

[0066] 200. Battery module;

[0067] 40. Shell; 41. Top cover; 411. Opening; 42. Side cover; 43. Opening;

[0068] 50. Battery pack; 51. Battery cell; 52. Sealing groove; 53. Terminal tab;

[0069] 61. First adhesive component; 62. Second insulating component; 63. Second adhesive component; 64. Third insulating component;

[0070] 70. Protective film. Detailed Implementation

[0071] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0072] This application aims to avoid the problem of electronic components 111 and battery pack interface 121 being placed on different printed circuit boards, and connecting electronic components 111 and battery pack interface 121 through a flexible circuit board, and stacking the printed circuit boards. This avoids the problem of electronic components 111 and battery pack interface 121 being placed on the same printed circuit board at the same time, which would result in the printed circuit board being too large and failing to meet the needs of compact development of electronic devices.

[0073] This application provides a battery management module 100, which can be applied to electronic devices such as mobile phones, computers, and electronic atomizers.

[0074] like Figure 1 This is a schematic diagram of the overall structure of a battery management module 100 provided in an exemplary embodiment of this application. Figure 1 As shown, the battery management module 100 includes: a first printed circuit board 11, a second printed circuit board 12, and a first flexible circuit board 21.

[0075] A printed circuit board (PCB) is a rigid board that serves as a support for electronic components (such as chips, resistors, and capacitors) and a carrier for their electrical interconnections. Because it is manufactured using electronic printing techniques, it is called a "printed" circuit board.

[0076] Flexible printed circuit (FPC) is a type of circuit board made with polyimide or polyester film as the substrate. It is highly reliable and extremely flexible, and features high wiring density, light weight, thinness and good bending ability.

[0077] See also Figure 2 and Figure 3 The first printed circuit board 11 is provided with electronic components 111, which can be used to monitor internal operating parameters such as charging voltage, current, temperature, and discharging current. The electronic components 111 can be disposed on one side of the first printed circuit board, or on both sides. In this embodiment, to make more efficient use of space, multiple electronic components 111 are disposed on opposite sides of the first printed circuit board 11. By arranging electronic components 111 on both sides of the first printed circuit board 11, space utilization can be improved.

[0078] The second printed circuit board 12 is provided with a battery pack interface 121, which is configured to connect to the battery pack 50. By connecting to the battery pack 50 through the battery pack interface 121, the relevant operating parameters of the battery pack 50 can be obtained.

[0079] The first flexible circuit board 21 is used to connect the battery pack interface 121 and the electronic components 111, so that the relevant operating parameters of the battery pack 50 can be transmitted from the battery pack interface 121 to the electronic components 111 through the first flexible circuit board 21.

[0080] In addition, the first printed circuit board 11 and the second printed circuit board 12 are arranged overlappingly. For example, the first printed circuit board 11 can be positioned above the second printed circuit board 12, or the second printed circuit board 12 can be positioned above the first printed circuit board 11. This can reduce the size of the battery management module 100 and is conducive to the miniaturization trend of electronic devices.

[0081] This application sets up a first printed circuit board 11 and a second printed circuit board 12, with electronic components 111 set on the first printed circuit board 11 and battery pack interface 121 set on the second printed circuit board 12. That is, the battery pack interface 121 and electronic components 111 are set on different printed circuit boards, and the electronic components 111 and battery pack interface 121 are connected by a first flexible circuit board 21. At the same time, the first printed circuit board 11 and the second printed circuit board 12 are overlapped. This can greatly reduce the size of the battery management module 100, which is conducive to the compact development trend of electronic devices and avoids the problem of electronic components 111 and battery pack interface 121 being set on the same printed circuit board, resulting in an excessively large printed circuit board size that does not meet the needs of compact electronic devices.

[0082] Meanwhile, during drops or vibrations of the battery module 200, the battery management module 100, formed by the combination of the printed circuit board and the flexible circuit board, can better cope with vibration, temperature changes, and environmental contaminants, improving the reliability of the battery management module. Furthermore, the battery management module 100, formed by the combination of the printed circuit board and the flexible circuit board, has high mechanical strength and thermal reliability, enhances its resistance to vibration and shock, optimizes heat dissipation, simplifies manufacturing and assembly, reduces complexity, minimizes potential failure points, and offers strong scalability and adaptability, supporting different battery configurations and environmental requirements.

[0083] The third printed circuit board 13 and its connection relationship are described below.

[0084] See also Figures 2-6 In order to enable the battery management module 100 to connect to external circuits at the same time, in some embodiments, the battery management module 100 further includes a third printed circuit board 13 and a second flexible circuit board 22.

[0085] The third printed circuit board 13 is provided with a terminal interface 131, which is used to connect to an external circuit. The second flexible circuit board 22 connects the terminal interface 131 and the electronic component 111. The first printed circuit board 11, the second printed circuit board 12 and the third printed circuit board 13 are arranged overlappingly.

[0086] Similarly, by setting up a first printed circuit board 11, a second printed circuit board 12, and a third printed circuit board 13, and stacking the three, the size of the battery management module 100 can be greatly reduced, which is conducive to the trend of compact development of electronic devices and avoids the purpose of a single printed circuit board causing the printed circuit board to be too large, thus failing to meet the needs of compact development of electronic devices.

[0087] In some embodiments, the second printed circuit board 12 is located between the first printed circuit board 11 and the third printed circuit board 13. That is, the three printed circuit boards are stacked, with the second printed circuit board 12 in the middle, i.e., the battery pack interface 121 is located in the middle. When the battery management module 100 is placed inside the battery module 200, and the battery management module 100 is snapped into the soft-pack cell sealing groove 52, the tabs 53 of the soft-pack cell can just make contact with the battery pack interface 121, so as to make reasonable use of space.

[0088] In some embodiments, the battery management module 100 further includes an electromagnetic shielding component 31, which is disposed between the second printed circuit board 12 and the third printed circuit board 13. Since the electronic components 111 on the first printed circuit board 11 generate high-frequency noise and electromagnetic interference, which may affect the electronic components 111 connected to it, or even cause system instability, the electromagnetic shielding component 31 is disposed between the second printed circuit board 12 and the third printed circuit board 13. The electromagnetic shielding component 31 shields the electronic components 111 on the first printed circuit board 11 from generating high-frequency noise and electromagnetic interference, reducing or avoiding the impact on the electronic components 111 connected to it, and ensuring the stability and safety of the system.

[0089] In some embodiments, the electromagnetic shielding element 31 is a ferrite sheet. By setting the electromagnetic shielding element 31 as a ferrite sheet, efficient energy conversion and magnetic field shielding can be achieved, further ensuring the stability and safety of the battery system.

[0090] In some embodiments, the terminal interface 131 comprises multiple contact pieces. By using multiple contact pieces, when installed within the cover, these pieces can be internally integrated, preventing direct contact with the contact pieces when touching the cover, thus improving safety. Contact pieces, also known as conductive pieces, are designed to ensure a stable and reliable electrical connection. They are typically thin sheets, usually made of materials with excellent conductivity, such as metal or special conductive plastics, ensuring efficient transmission of current and signals. In other embodiments, the terminal interface 131 can also be multiple metal sheets or a gold plating layer formed by an immersion gold process.

[0091] In some embodiments, the battery management module 100 further includes a buffer 32 disposed between the first printed circuit board 11 and the second printed circuit board 12. The buffer pad on the first printed circuit board 11 and the second printed circuit board 12 serves three purposes: first, it facilitates the fixing of the first printed circuit board 11 and the second printed circuit board 12; second, it acts as a buffer to protect the electronic components 111 when the battery module is dropped or subjected to external impact; and third, it isolates heat between the first and second printed circuit boards, preventing heat transfer between the two circuit boards.

[0092] The following section describes the battery pack interface 121 and its related structures.

[0093] Please also refer to Figure 6 and Figure 7 In some embodiments, the battery pack interface 121 includes at least two metal tabs 122 fixed to the second printed circuit board 12. By setting the battery pack interface 121 to metal tabs 122 (such as copper, brass, beryllium copper, nickel, etc.), the high conductivity of the metal tabs 122 ensures stable transmission of current or signals, reducing contact resistance and energy loss.

[0094] In some embodiments, to improve space utilization and facilitate better contact with the tabs 53 of the pouch cell, each metal sheet 122 is provided with at least one crease 123. When the battery management module 100 is placed inside the battery module 200, the metal sheet 122 is bent along the crease 123 to make contact with the tabs 53 of the pouch cell. Folding can also effectively absorb problems of insufficient or unstable contact caused by the misalignment tolerance of the tab 53. Furthermore, folding can better utilize space. In addition, folding can also disperse external impact forces and prevent the metal sheet 122 from bending or breaking when the battery pack 50 vibrates, collides, or experiences temperature changes, thus ensuring the reliability of the connection.

[0095] In this embodiment, the battery pack interface 121 includes four metal pieces 122, each of which has two creases 123. When the battery management module 100 is placed inside the battery module 200, the metal pieces 122 are bent along the creases 123 to make contact with the tabs 53 of the pouch cells.

[0096] In some embodiments, to prevent electrical contact between the metal sheets 122, the battery pack interface 121 further includes a first insulating member 33 disposed between at least two metal sheets 122. By providing the first insulating member 33 between the metal sheets 122, electrical contact between the metal sheets 122 is prevented, ensuring normal operation of each metal sheet 122.

[0097] In this embodiment, the battery pack interface 121 includes four metal tabs 122, and also includes a first insulating member 33 disposed between the four metal tabs 122. Because the battery module 200 has two pouch cells, each pouch cell including two tabs 53, four metal tabs 122 are required, with each metal tab 122 electrically connected to one tab 53. In other embodiments, if the number of pouch cells is different, for example, if one pouch cell is used, only two metal tabs 122 are needed; if three pouch cells are used, six metal tabs 122 are needed, and so on.

[0098] Of course, to avoid short circuits between the metal sheets 122, a first insulating member 33 is provided between the metal sheets 122. The shape or number of the first insulating member 33 can be set as needed, and its purpose is to separate the metal sheets 122. In this embodiment, when there are four metal sheets 122, the first insulating member 33 is in a cross shape, and the cross-shaped insulating member can just separate the four metal sheets 122.

[0099] In this embodiment, the first insulating element 33 is a rigid insulating sheet. By setting the insulating sheet as a rigid insulating sheet, it can withstand some stress and environmental corrosion, and reliably isolate the metal sheet 122 to prevent safety hazards such as short circuits.

[0100] The second subject of protection will be introduced below.

[0101] like Figure 8 and Figure 9 As shown, this application also provides a battery module 200, which includes the battery management module 100 as described above. The battery module 200 has all the beneficial effects of the aforementioned battery management module 100, which will not be repeated here.

[0102] The battery module 200 also includes a housing 40 and a battery pack 50, with the battery pack 50 disposed inside the housing 40 and connected to the battery pack interface 121.

[0103] Specifically, in this embodiment, the battery pack 50 is a pouch cell. Typically, one end of the pouch cell is provided with a sealing groove 52, and the battery management module 100 is snapped into the sealing groove 52. This fully utilizes the structure of the pouch cell to fix the battery management module 100, improving space utilization. When the battery management module 100 is placed inside the battery module 200, and when the battery management module 100 is snapped into the sealing groove 52 of the pouch cell, the tabs 53 of the pouch cell can just contact the battery pack interface 121, thus making reasonable use of space.

[0104] By using pouch cells, energy density can be increased and the weight and volume of the battery module 200 can be reduced. In addition, three-dimensional wiring is achieved by combining flexible circuit boards and printed circuit boards to accommodate the shape of the cell 51 with a sealing groove 52 at one end. This not only reduces the number of cables but also reduces the risk of failure caused by plugging and unplugging connectors, thereby improving the reliability of the battery module 200.

[0105] Furthermore, the battery module 200 also includes a third insulating element 64, which is disposed between the battery pack 50 and the battery management module 100. By providing the third insulating element 64 between the battery pack 50 and the battery management module 100, the battery management module 100 is protected. Specifically, the third insulating element 64 is insulating paper. The insulating paper is soft, thin, has excellent insulation performance, is moisture-proof, and high-temperature resistant. It can fit well with the sealing groove 52 of the soft-pack battery cell, maximizing the space utilization of the sealing groove 52.

[0106] The battery management module 100 of the battery module 200 uses a first printed circuit board 11 and a second printed circuit board 12. Electronic components 111 are placed on the first printed circuit board 11, and the battery pack interface 121 is placed on the second printed circuit board 12. That is, the battery pack interface 121 and the electronic components 111 are placed on different printed circuit boards, and the electronic components 111 and the battery pack interface 121 are connected by a first flexible circuit board 21. At the same time, the first printed circuit board 11 and the second printed circuit board 12 are overlapped. This can greatly reduce the size of the battery management module 100, which is conducive to the compact development trend of electronic devices and avoids the problem of placing electronic components 111 and the battery pack interface 121 on the same printed circuit board, resulting in an excessively large printed circuit board size that does not meet the needs of compact electronic devices.

[0107] The following is an introduction to the battery pack 50 and related structures of the battery module 200.

[0108] In some embodiments, the battery pack 50 includes at least one battery cell 51, which is connected to the battery pack interface 121. That is, the battery pack 50 may include one battery cell 51, two battery cells 51, three battery cells 51, four battery cells 51, etc. The number of battery cells 51 can be set as needed, but each battery cell 51 must be electrically connected to the battery pack interface 121.

[0109] Specifically, in this embodiment, the battery pack 50 includes two parallel battery cells 51, which are connected to the battery pack interface 121. That is, the battery pack 50 includes two battery cells 51, which are arranged in parallel and each connected to the battery pack interface 121. As mentioned earlier, each of the two battery cells 51 has two tabs 53, requiring the battery pack interface 121 to have four corresponding metal plates 122, each metal plate 122 connected to one tab 53. The tabs 53 and the metal plates 122 can be fixedly connected, for example, by laser welding, and the second printed circuit board 12 can provide support for the laser welding.

[0110] Furthermore, to prevent relative displacement between the two cells 51, a first adhesive member 61 is provided between them. The first adhesive member 61 bonds the two cells 51 together, preventing relative displacement between them.

[0111] The following describes the housing 40 and related structures.

[0112] The housing 40 can be a plastic housing or a metal housing, primarily for the purpose of protecting the battery pack 50. In this embodiment, the housing 40 is a metal housing, which further reduces the size of the battery module 200. Correspondingly, when the housing 40 is a metal housing, the battery module 200 also needs to include a second insulating member 62, which is disposed within the battery pack 50 and the housing 40. Because the housing 40 is metal, a second insulating member 62 is required between the housing 40 and the battery pack 50 to insulate them from short circuits. Specifically, in this embodiment, the second insulating member 62 is insulating tape, which is adhered to the battery pack 50.

[0113] Furthermore, a second adhesive member 63 is provided between the battery pack 50 and the housing 40 and the second insulating member 62. To prevent relative displacement between the housing 40, battery pack 50, and second insulating member 62, second adhesive members 63 are provided between the battery pack 50 and the second insulating member 62, and between the housing 40 and the second insulating member 62. These second adhesive members 63 bond the battery pack 50 and the second insulating member 62, and the housing 40 and the second insulating member 62 together, thus preventing relative displacement. Specifically, when the second insulating member 62 is insulating tape, since the insulating tape is only adhesive on one side, the second insulating member 62 can be directly bonded to the battery pack 50. Therefore, only the second adhesive member 63 is needed to bond the housing 40 and the second insulating member 62 together.

[0114] In some embodiments, the housing 40 has an opening 43 on one side, and the battery pack 50 is a pouch cell. Since the battery pack 50 is a pouch cell, expansion space needs to be provided for the pouch cell; therefore, an opening 43 is provided on one side of the housing 40, allowing expansion of the pouch cell. Furthermore, the pouch cell can be a rechargeable secondary pouch cell.

[0115] In some embodiments, to ensure the safety of the battery module 200, the battery module 200 also includes a protective film 70 covering the outer casing 40, which can be adhered to the casing 40. The protective film 70 is the first line of defense for the battery, primarily preventing physical damage such as impacts and scratches from external objects. The protective film 70 isolates the battery from the external environment, effectively protecting its safety and preventing battery accidents caused by external forces. Additionally, the protective film 70 also prevents the battery from contacting the external environment. Specifically, the protective film 70 can be a PET (polyethylene terephthalate) protective film 70, and its outer surface can be printed with text and patterns for use as a product label.

[0116] Furthermore, the protective film 70 is provided with a tail strap, which can function as a handle for removing the battery module 200 from the battery compartment, making it easy to remove the battery module 200 from the battery compartment.

[0117] The cover plate is described below.

[0118] In some embodiments, the battery module 200 further includes a top cover plate 41, which covers the battery management module 100 and is fixed to the housing 40. The top cover plate 41 protects the battery management module 100. Additionally, the top cover plate 41 has an opening 411, with a terminal interface 131 opposite to it. When the terminal interface 131 needs to be connected to an external electronic component 111, a conductive sheet passes through the opening 411 and contacts the terminal interface 131 to establish an electrical connection.

[0119] Furthermore, the battery module 200 also includes a side cover plate 42, which is disposed on one side of the battery management module 100 and fixed to the top cover plate 41 and the housing 40, so as to house the battery management module 100 therein and protect the battery management module 100.

[0120] Specifically, the side cover plate 42 and the top cover plate 41 are connected by snap-fit ​​connections, as are the top cover plate 41 and the housing 40, and the side cover plate 42 and the housing 40. For example, a slot can be provided on the housing 40, and a snap-fit ​​can be provided on the top cover plate 41, which is then engaged with the slot to fix the top cover plate 41 to the housing 40. Similarly, a snap-fit ​​can be provided on the side cover plate 42, which is engaged with the housing 40 to fix the side cover plate 42 to the housing 40.

[0121] This application also provides an electronic device, which includes the aforementioned battery management module 100 or the aforementioned battery module 200. This electronic device possesses all the beneficial effects of the aforementioned battery management module 100 or the aforementioned battery module 200, which will not be elaborated further here. The electronic device can be a mobile phone, computer, electronic atomizer, etc.

[0122] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0123] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0124] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0125] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A battery management module, characterized in that, The battery management module includes: The first printed circuit board contains electronic components; The second printed circuit board is provided with a battery pack interface, which is configured to connect to a battery pack; A first flexible circuit board connects the battery pack interface and the electronic components; The first printed circuit board and the second printed circuit board are arranged overlappingly.

2. The battery management module according to claim 1, characterized in that, The battery management module also includes: The third printed circuit board is equipped with terminal interfaces; A second flexible circuit board connects the terminal interface and the electronic components; The first printed circuit board, the second printed circuit board, and the third printed circuit board are arranged in an overlapping manner.

3. The battery management module according to claim 2, characterized in that, The second printed circuit board is located between the first printed circuit board and the third printed circuit board.

4. The battery management module according to claim 3, characterized in that, The battery management module also includes an electromagnetic shielding component, which is disposed between the second printed circuit board and the third printed circuit board.

5. The battery management module according to claim 4, characterized in that, The electromagnetic shielding component is a ferrite sheet.

6. The battery management module according to claim 2, characterized in that, The terminal interface consists of multiple contact pieces, multiple metal pieces, or multiple gold-plated layers.

7. The battery management module according to any one of claims 1-6, characterized in that, The battery management module also includes a buffer component, which is disposed between the first printed circuit board and the second printed circuit board.

8. The battery management module according to any one of claims 1-6, characterized in that, The battery pack interface includes at least two metal plates fixed to the second printed circuit board.

9. The battery management module according to claim 8, characterized in that, Each of the metal sheets has at least one crease.

10. The battery management module according to claim 9, characterized in that, The battery pack interface includes four metal plates, each of which has two creases.

11. The battery management module according to claim 8, characterized in that, The battery pack interface also includes a first insulating element disposed between at least two of the metal sheets.

12. The battery management module according to claim 8, characterized in that, The battery pack interface includes four metal plates, and the battery pack interface also includes a first insulating member disposed between the four metal plates.

13. The battery management module according to claim 12, characterized in that, The first insulating element is cross-shaped.

14. The battery management module according to claim 11 or 13, characterized in that, The first insulating element is a rigid insulating sheet.

15. The battery management module according to any one of claims 1-6, characterized in that, The number of electronic components is multiple, and the multiple electronic components are respectively disposed on opposite sides of the first printed circuit board.

16. A battery module, characterized in that, The battery module includes: The battery management module as described in any one of claims 1-15; case; A battery pack is disposed inside the housing and connected to the battery pack interface.

17. The battery module according to claim 16, characterized in that, The battery pack includes at least one battery cell, and at least one battery cell is connected to the battery pack interface.

18. The battery module according to claim 17, characterized in that, The battery pack includes two cells arranged side by side, and the two cells are connected to the battery pack interface.

19. The battery module according to claim 18, characterized in that, A first adhesive is provided between the two battery cells.

20. The battery module according to any one of claims 16-19, characterized in that, The casing is a metal casing; The battery module also includes a second insulating component, which is disposed within the battery pack and the housing.

21. The battery module according to claim 20, characterized in that, A second adhesive is provided between the battery pack and the housing and the second insulating member.

22. The battery module according to claim 20, characterized in that, The casing has an opening on one side, and the battery pack uses pouch cells.

23. The battery module according to any one of claims 16-19, characterized in that, The battery module also includes a protective film covering the outside of the housing.

24. The battery module according to claim 23, characterized in that, The protective film is provided with a tail strip.

25. The battery module according to any one of claims 16-19, characterized in that, The battery pack is a pouch cell, and one end of the pouch cell is provided with a sealing groove, in which the battery management module is fitted.

26. The battery module according to any one of claims 16-19, characterized in that, The battery module also includes a third insulating component, which is disposed between the battery pack and the battery management module.

27. The battery module according to claim 26, characterized in that, The third insulating component is insulating paper.

28. The battery module according to any one of claims 16-19, characterized in that, The battery module also includes a top cover plate, which is placed on the battery management module and fixed to the housing.

29. The battery module according to claim 28, characterized in that, The battery module also includes a side cover, which is disposed on one side of the battery management module and fixed to the top cover and the housing.

30. The battery module according to claim 29, characterized in that, The side cover plate and the top cover plate, the top cover plate and the housing, and the side cover plate and the housing are snap-fit ​​connected.

31. An electronic device, characterized in that, The electronic device includes a battery management module as described in any one of claims 1-15 or a battery module as described in any one of claims 16-30.

32. The electronic device according to claim 31, characterized in that, The electronic device is an electronic atomizer.

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