Battery assembly and electric appliance

Abstract

The application provides a battery assembly and an electric device. The battery assembly comprises a single battery, the single battery comprises a shell and a battery core, the shell has a containing cavity, the battery core is arranged in the containing cavity, the battery core comprises a tab, and the tab is at least partially exposed to the containing cavity; a protection module is arranged outside the containing cavity; a connector is electrically connected with the protection module, and the connector is used for being electrically connected with an external terminal; and a flexible wire comprises two ends which are away from each other, one end of the flexible wire is electrically connected with the tab, and the other end of the flexible wire is electrically connected with the protection module. In the application, the protection module is arranged outside, which helps to reduce the overall volume of the single battery; the protection module and the tab are connected through the flexible wire, the utilization rate of the internal space of the electric device is improved, the miniaturization trend of the electric device is met, and the flexibility of the connection mode between the protection module and the connector is improved due to the electrical connection between the protection module and the connector.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery module and an electrical device. Background Technology

[0002] With the rapid development of various electrical devices such as electric vehicles, portable electronic devices, and energy storage systems, their functions are becoming increasingly diversified and their integration is constantly improving, which puts forward higher requirements for the optimization of the internal structural layout of electrical devices.

[0003] In related technologies, the complex connection structure inside electrical equipment not only has poor positional flexibility but also low space utilization, which limits the miniaturization and integrated design of electrical equipment. Utility Model Content

[0004] This application aims to provide a battery assembly and an electrical device to solve the problem that the internal connection structure of the electrical device limits the miniaturization and integrated design of the electrical device.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, this application discloses a battery assembly, comprising:

[0007] A single battery cell includes a casing and a battery cell. The casing has a receiving cavity, the battery cell is disposed within the receiving cavity, and the battery cell includes tabs, at least partially exposed outside the receiving cavity.

[0008] A protection module is disposed outside the receiving cavity;

[0009] A connector, which is electrically connected to the protection module, and is used for electrical connection with an external terminal;

[0010] And a flexible conductor, the flexible conductor having two opposing ends, one end of the flexible conductor being electrically connected to the electrode tab, and the other end of the flexible conductor being electrically connected to the protection module.

[0011] Optionally, the battery assembly further includes a flexible circuit board, one side of which is electrically connected to the protection module, and the connector is electrically connected to one side of the flexible circuit board.

[0012] Optionally, the flexible wire is electrically connected to the side of the flexible circuit board away from the protection module.

[0013] Optionally, the protection module includes at least one of a SIP module and a protection board.

[0014] Optionally, the SIP module includes a substrate, a molding compound, and a first component, wherein the first component is disposed on the substrate, the molding compound covers the first component and at least a portion of the substrate, and the substrate is soldered to the flexible circuit board;

[0015] Alternatively, the protective board includes a printed circuit board and a second component, the second component being disposed on the side of the printed circuit board facing away from the flexible circuit board, and the printed circuit board being soldered to the flexible circuit board.

[0016] Optionally, the electrode includes a first electrode and a second electrode, and there are two protection modules and two flexible wires. One protection module is electrically connected to the first electrode through one flexible wire, and the other protection module is electrically connected to the second electrode through another flexible wire.

[0017] Optionally, the flexible conductor includes multiple flexible sub-conductors, one end of which is electrically connected to one of the protection modules, and the other end of which is electrically connected to one of the electrode tabs.

[0018] Optionally, the connector is provided with signal pins, and the connectors on the two protection modules are electrically connected to the external terminal through the signal pins to form a power supply circuit for the protection module.

[0019] Optionally, the connection method between the flexible conductor and the electrode includes at least one of welding, crimping, and splicing.

[0020] Secondly, this application also discloses an electrical device, including: a housing, a motherboard, and a battery assembly as described in any of the above, wherein the motherboard and the battery assembly are disposed within the housing, and the battery assembly is electrically connected to the motherboard via the connector.

[0021] In this embodiment, the casing of the single battery cell has a receiving cavity, the battery cell is disposed within the receiving cavity, and the tabs of the battery cell are at least partially exposed outside the receiving cavity. The protection module is disposed outside the receiving cavity of the casing and is electrically connected to the tabs of the battery cell via a flexible wire. This externally mounted protection module saves space within the single battery cell for the protection module, helping to reduce the overall size of the single battery cell. The protection module is connected to the tabs via a flexible wire, which can adapt to irregular spaces within the casing of the electrical equipment, thereby improving the utilization rate of internal space and conforming to the trend of miniaturization of electrical equipment. Furthermore, the externally mounted protection module is electrically connected to a connector for electrical connection to an external terminal. Since the protection module is externally mounted within the receiving cavity of the casing, the flexibility of the connection method between the protection module and the connector is improved.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a front view of the battery assembly in an embodiment of this application;

[0025] Figure 2 This is a side view of the battery assembly in an embodiment of this application.

[0026] Figure label:

[0027] 10 - Single cell, 11 - Casing, 111 - Receiving cavity, 12 - Cell, 121 - First tab, 122 - Second tab, 20 - Protection module, 30 - Flexible wire, 40 - Connector, 50 - Flexible circuit board. Detailed Implementation

[0028] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0029] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0030] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] With the rapid development of various electrical devices such as electric vehicles, portable electronic devices, and energy storage systems, their functions are becoming increasingly diversified and their integration is constantly improving. This places higher demands on the optimization of the internal structural layout of these devices. In particular, in related technologies, the internal connectors of these devices are connected to the batteries via wiring harnesses. This complex connection structure not only lacks flexibility in location design but also has low space utilization. Due to the limited internal space of these devices and the presence of numerous components, the space available for the connection structure is small and irregular, thus restricting the miniaturization and integration design of these devices.

[0033] Based on this, embodiments of this application provide a battery assembly to solve the above problems and improve the utilization rate of internal space in electrical equipment.

[0034] like Figures 1 to 2 As shown, the battery assembly disclosed in this application may specifically include a single battery cell 10, a protection module 20, a connector 40, and a flexible wire 30. The single battery cell 10 includes a housing 11 and a cell 12. The housing 11 has a receiving cavity 111, and the cell 12 is disposed in the receiving cavity 111. The cell 12 includes a tab, which is at least partially exposed outside the receiving cavity 111. The protection module 20 is disposed outside the receiving cavity 111. The connector 40 is electrically connected to the protection module 20 and is used for electrical connection with an external terminal. The flexible wire 30 includes two opposing ends. One end of the flexible wire 30 is electrically connected to the tab, and the other end of the flexible wire 30 is electrically connected to the protection module 20.

[0035] In this embodiment, the outer casing 11 of the single battery cell 10 has a receiving cavity 111, and the battery cell 12 is disposed within the receiving cavity 111. At least part of the tabs of the battery cell 12 are exposed outside the receiving cavity 111, while the protection module 20 is disposed outside the receiving cavity 111 of the outer casing 11 and electrically connected to the tabs of the battery cell 12 via a flexible wire 30. This external structure of the protection module 20 saves space within the single battery cell 10 used for the protection module 20, helping to reduce the overall volume of the single battery cell 10. The protection module 20 is connected to the tabs via the flexible wire 30, which can adapt to irregular spaces within the outer casing 11 of the electrical equipment, thereby improving the utilization rate of internal space and conforming to the trend of miniaturization of electrical equipment. Furthermore, the externally disposed protection module 20 is electrically connected to the connector 40 to connect to an external terminal. Since the protection module 20 is externally disposed within the receiving cavity 111 of the outer casing 11, the flexibility of the connection method between the protection module 20 and the connector 40 is improved.

[0036] It should be noted that when the protection module 20 is located inside the casing 11 of the single battery cell 10, the maintenance and replacement of the protection module 20 is inconvenient, requiring the entire single battery cell 10 to be disassembled. By placing the protection module 20 externally in the casing 11 of the single battery cell 10 and connecting it to the cell via a flexible wire 30, the protection module 20 can be maintained and replaced independently in the future, reducing maintenance costs. In addition, since the protection module 20 may generate a lot of heat during operation, with this external protection module 20 structure, and because the protection module 20 is connected to the cell 12 via a flexible wire 30, the heat generated by the protection module 20 is not easily transferred to the cell 12, thereby avoiding heat damage to the cell 12.

[0037] Specifically, the single battery 10 serves as an energy storage unit, providing power support for electrical devices. The single battery 10 includes a casing 11, with a receiving cavity 111 inside the casing 11. The receiving cavity 111 has an opening, and the battery cell 12 can be assembled into the receiving cavity 111 through the opening. The single battery 10 can be a cylindrical battery, a square battery, or a pouch battery, etc. The casing 11 can be made of a steel casing, an aluminum casing, or a soft casing encapsulated with an aluminum-plastic film. This application embodiment does not specifically limit the type of single battery 10 or the material of the casing 11. The battery cell 12 can be a lithium-ion battery cell 12, a solid-state battery cell 12, or a polymer battery cell 12. The positive and negative tabs of the battery cell 12 are at least partially exposed through the opening in the housing 11 to the receiving cavity 111 of the housing, facilitating electrical connection between the protection module 20, which is externally located in the receiving cavity 111 of the housing 11, and the battery cell 12. The protection module 20 provides overcharge, over-discharge, and short-circuit protection for the individual battery cell 10. In this embodiment, the protection device in the protection module 20 can be connected to a circuit board, or it can be encapsulated in a plastic package to ensure its structural strength and reliability. The flexible conductor 30 enables the electrical connection between the battery cell 12 tabs and the protection module 20. The flexible conductor 30 can adopt a multi-layer composite structure, comprising a conductive layer, an insulating layer, and a protective layer from the inside out. The conductive layer can be a copper conductor, the insulating layer is made of polyimide (PI), and the protective layer is a silicone protective layer to provide external protection and improve the bending and compression resistance of the flexible conductor 30. In practical applications, the flexible conductor 30 includes two opposing ends, one of which is soldered to the electrode tab, and the other end is soldered to the circuit board of the protection module 20. The connector 40 is directly electrically connected to the protection module 20 or electrically connected through an external circuit board. The connector 40 is indirectly connected to the cell 12 through the protection module 20. When the connector 40 is electrically connected to an external terminal, the cell 12 of the single battery 10 can supply power to the external terminal.

[0038] Understandably, since the flexible conductor 30 is used to achieve the electrical connection between the battery cell 12 and the protection module 20, and the protection module 20 is externally located within the casing 11 of the single battery cell 10, when this battery assembly is installed within the casing 11 of the electrical device, the position of the protection module 20 is not actually fixed, but can be flexibly set according to the space within the casing 11 of the electrical device. When the battery cell 12 and the protection module 20 are connected via the flexible conductor 30, the flexibility of the protection module 20's position design is further enhanced. For example, the flexible conductor 30 can be bent, twisted, or coiled to adapt to irregular spaces within the casing 11 of the electrical device, improving the utilization rate of the internal space. In practical applications, the type of flexible conductor 30 can be freely selected. For example, the flexible conductor 30 can be a copper conductor, an aluminum conductor, a copper-clad aluminum conductor, an alloy conductor, etc., and this application does not impose specific limitations on this.

[0039] Optionally, the battery assembly also includes a flexible circuit board 50, one side of which is electrically connected to the protection module 20, and a connector 40 is electrically connected to one side of the flexible circuit board 50. Specifically, as... Figure 2 As shown, the flexible circuit board 50 includes two opposite sides along its thickness direction. The protection module 20 and the connector 40 are spaced apart on the same side of the flexible circuit board 50 and are respectively welded to the flexible circuit board 50. In this way, the integrated layout of the protection module 20 and the connector 40 is achieved through the flexible circuit board 50, improving the space utilization of the battery assembly. Furthermore, due to the thin, flexible, and foldable characteristics of the flexible circuit board 50, it can be bent as needed to adapt to irregular layout spaces, reducing space occupation. When the battery assembly is assembled into electrical equipment, it can adapt to the complex and limited space layout within the equipment housing 11. This flexible connecting plate adopts a modular design, thereby reducing assembly processes such as wire harness bundling and fixing in existing technologies, helping to improve production efficiency and avoiding functional failures caused by assembly errors. In addition, compared to traditional wire harnesses, this flexible connecting plate has a lighter structure, meeting the requirements for lightweight battery assemblies and improving the portability of electrical equipment. By placing the protection module 20 and connector 40 on the same side of the flexible circuit board 50, the structure on the other side of the flexible circuit board 50 is simplified, reducing the processing technology of the flexible circuit board 50. The corresponding circuitry only needs to be designed on the substrate side of the flexible circuit board 50, reducing its thickness and saving space. In specific applications, the substrate of the flexible circuit board 50 can be made of polyimide (PI) or polyester (PET), and circuit traces can be formed using rolled copper foil or electrolytic copper foil. When the protection module 20 and connector 40 are connected to one side of the flexible circuit board 50, a reinforcing plate can be provided on the other side of the flexible circuit board 50 as needed to ensure the local strength of the flexible circuit board 50 and the connection strength between the protection module 20, connector 40, and the flexible circuit board 50, preventing connection failure caused by bending or deformation of the flexible circuit board 50.

[0040] Optionally, the flexible circuit board 50 includes at least one of flexible printed circuit boards, flexible die-cut circuit boards, and flexible flat cables. Specifically, the flexible printed circuit board (FPC) uses polyimide (PI) or polyester film (PET) as the substrate and has the characteristics of being thin, lightweight, and able to be bent, folded, and even twisted. This allows it to adapt to the limited space inside electrical equipment, reducing the overall weight and volume of the equipment, improving the integration of the equipment, and conforming to the trend of miniaturization. Furthermore, the circuitry of the FPC is pre-configured during production, thus saving assembly time for battery components. The flexible die-cut circuit board (FDC) also uses polyimide (PI) or polyester film (PET) as the substrate, and its circuitry is formed by die-cutting. Like the FPC, the FDC also has the characteristics of being freely bent, folded, and twisted, offering a high degree of freedom in structural design and installation, allowing for reasonable layout and connection within the internal space of the electrical equipment housing 11. Flexible flat cables (FFCs) typically transmit current or signals using copper or tin-plated wires, with an insulation layer of polyimide (PI) or other high-temperature resistant materials to prevent short circuits. These flexible connectors offer good flexibility, allowing them to adapt to the complex internal environments of electrical equipment. In practical applications, technicians can choose the appropriate type based on specific needs. The flexibly selectable type of flexible connector allows for adaptation to different product requirements, significantly enhancing product design flexibility.

[0041] like Figure 2 As shown, the flexible wire 30 is electrically connected to the side of the flexible circuit board 50 away from the protection module 20. In this way, when the protection module 20 and the flexible circuit board 50 are welded together, the weight of the protection module 20 is borne by the solder joint on one side of the flexible circuit board 50, while the stress generated by the connection between the flexible wire 30 and the flexible circuit board 50 is mainly borne by the solder joint on the other side of the flexible circuit board 50. This avoids the solder joint on the side connected to the protection module 20 bearing double stress, thereby ensuring the connection strength on both sides of the flexible circuit board 50 and enhancing the vibration resistance of the flexible circuit board 50 and even the entire battery assembly.

[0042] Optionally, the protection module 20 includes at least one of a SIP module and a protection board. The SIP module encapsulates the protection device in a plastic housing, while the protection board electrically connects the protection device to a printed circuit board. It is understood that by connecting the protection device to the external support structure as described above, the reliability of the electrical connection, the stability of the mechanical structure, and the environmental adaptability of the protection device can be effectively guaranteed. In specific applications, the structural form of the protection module 20 can be flexibly selected.

[0043] The protection module 20 may include protection devices. Specifically, the protection devices may include overcharge / overdischarge protection devices such as voltage monitoring chips and Zener diodes, overcurrent / short circuit protection devices such as metal-oxide-semiconductor field-effect transistors (MOSFETs), positive temperature coefficient (PTC) thermistors, fuses, etc., and overheat protection devices such as negative temperature coefficient (NTC) thermistors and temperature switches. The types of protection devices are not specifically limited in this application embodiment.

[0044] In some optional embodiments of this application, the protection module 20 is a SIP module. The SIP module includes a substrate, a molding compound, and a first component. The first component is disposed on the substrate, and the molding compound covers the first component and at least a portion of the substrate. The substrate is soldered to the flexible circuit board 50. In specific applications, the first component is electrically connected to the substrate. The molding compound can be made of epoxy resin and has an internal receiving space. The first component and at least a portion of the substrate are located within the receiving space. The exposed portion of the substrate can be used for connecting the flexible wire 30 to the protection module 20. It should be noted that the plastic encapsulation layer covering the first component and at least part of the substrate can isolate moisture, salt spray and chemicals, effectively preventing oxidation of the metal pins of the first component; the encapsulation layer can also block dust and conductive particles, avoiding the risk of short circuits in the first component; during the use of the battery assembly, it may also encounter vibration conditions, and the encapsulation layer can absorb the impact energy that the first component may be subjected to, so as to protect the first component from external damage; in addition, compared with the form of a protection board, this SIP module integrates multiple components into a single encapsulation shell through the encapsulation layer, which can reduce the overall size of the protection module 20.

[0045] In some alternative embodiments of this application, the protection module 20 is a protection board, which includes a printed circuit board and a second component. The second component is disposed on the side of the printed circuit board away from the flexible circuit board 50, and the printed circuit board is soldered to the flexible circuit board 50. It is understood that in the above structure, the second component is directly electrically connected to the printed circuit board, simplifying the structure of the protection module 20, reducing its overall weight, and occupying less layout space. This aligns with the current trend of battery lightweighting and miniaturization, saves on the material cost of the molding compound, and reduces the auxiliary materials and steps used in the molding process, thereby lowering production costs. Since the protection device is not covered by molding material, it can be directly exposed to the installation environment, which helps ensure the heat dissipation performance of the protection device. Furthermore, this open structure facilitates maintenance personnel inspection and repair, and also facilitates the replacement of damaged structures, reducing subsequent maintenance costs.

[0046] It should be understood that the first and second components in the embodiments of this application are protection devices that prevent battery overcharging, over-discharging, overcurrent, short circuit, or overheating. The number of protection devices can be one or more, and the number of each type of protection device can be one or more. The embodiments of this application do not specifically limit the type or number of the first component. In addition, when there are multiple protection modules 20 in this application, the multiple protection modules 20 can simultaneously include both protection boards and SIP modules.

[0047] Optionally, such as Figure 1 As shown, the electrode includes a first electrode 121 and a second electrode 122. There are two protection modules 20 and two flexible wires 30. One protection module 20 is electrically connected to the first electrode 121 via a flexible wire 30, and the other protection module 20 is electrically connected to the second electrode 122 via another flexible wire 30. Thus, the first electrode 121 and the second electrode 122 are each electrically connected to one protection module 20 via a flexible wire 30. This redundant design of the two protection modules 20 ensures the normal functioning of each module. Even if one protection module 20 fails to protect and monitor the cell 12, the other protection module 20 can still maintain its corresponding function through its connection to the electrode, thereby ensuring the protection of the individual battery cell 10 and extending its lifespan. Furthermore, this structure, where the protection module 20 is separately connected to the two electrodes of the cell 12, allows for more precise control of the charging and discharging state of the individual battery cell 10, avoiding overcharging or over-discharging due to the accumulation of errors from simultaneous monitoring of the positive and negative electrodes, and further extending the lifespan of the individual battery cell 10.

[0048] It should be noted that the number of protection modules 20 can also be one, and the protection module 20 can be electrically connected to either the first tab 121 or the second tab 122. When there is only one protection module 20, the protection module 20 is electrically connected to one of the first tab 121 and the second tab 122, and the other of the first tab 121 and the second tab 122 can be directly connected to the connector 40. This application does not impose specific limitations on this.

[0049] Optionally, the flexible conductor 30 includes multiple flexible sub-conductors, one end of which is electrically connected to a protection module 20, and the other end of which is electrically connected to a tab.

[0050] Specifically, the battery cell 12 includes a first tab 121 and a second tab 122. The protection module 20 can be connected to both the first tab 121 and the second tab 122 of the battery cell 12 simultaneously, or the protection module 20 can be connected to only the first tab 121 or the second tab 122 of the battery cell 12. The protection module 20 can be connected to the first tab 121 via one or more flexible sub-wires, or connected to the second tab 122 via one or more flexible sub-wires. If the protection module 20 is connected to the tab via only one flexible sub-wire, and this connection fails, the protection module 20 may not be able to accurately monitor the state of the battery cell 12, potentially leading to risks such as overcharging, over-discharging, or short circuits. When the protection module 20 is connected to the first tab 121 or the second tab 122 through multiple flexible sub-wires, the redundant design of multiple flexible sub-wires can ensure the reliability and strength of the connection between the protection module 20 and the first tab 121 or the second tab 122 of the cell 12. Even if one flexible sub-wire fails, the other flexible sub-wires can still maintain their corresponding functions.

[0051] Optionally, the connector 40 is provided with signal pins, and the connectors 40 on the two protection modules 20 are electrically connected to external terminals through the signal pins to form a power supply circuit for the protection module 20.

[0052] It should be noted that the control chip of the protection module 20 usually requires an external power supply to work properly. When the protection module 20 is only electrically connected to the first tab 121 or the second tab 122, it cannot form a circuit with the battery cell 12. By setting a signal pin in the protection module 20 and electrically connecting it to an external terminal through the signal pin, a complete current circuit can be formed between the battery cell 12 and the external terminal, thereby powering the control chip of the protection module 20 to realize its basic functions.

[0053] Optionally, the connection method between the flexible conductor 30 and the electrode tab includes at least one of welding, crimping, and splicing.

[0054] Specifically, crimping uses mechanical pressure to tightly bond the end of the flexible conductor 30 to the electrode tab, forming a stable electrical and mechanical connection. After crimping, a larger contact area is formed between the flexible conductor 30 and the electrode tab, improving connection reliability. This connection method is also simple to operate and improves production efficiency. In the connection method where the flexible conductor 30 and the electrode tab are interlocked, a slot can be provided at the end of the flexible conductor 30, and the electrode tab is inserted into the slot to achieve an electrical connection between the two. It should be noted that, in the traditional method, the flexible conductor 30 is connected to the electrode tab of the battery cell 12 by welding. In this embodiment, the flexible conductor 30 can be crimped or interlocked with the electrode tab of the battery cell 12, making the connection method more flexible.

[0055] In summary, the battery assembly provided in this application embodiment may include at least the following advantages:

[0056] In this embodiment, the casing of the single battery cell has a receiving cavity, the battery cell is disposed within the receiving cavity, and the tabs of the battery cell are at least partially exposed outside the receiving cavity. The protection module is disposed outside the receiving cavity of the casing and is electrically connected to the tabs of the battery cell via a flexible wire. This externally mounted protection module saves space within the single battery cell for the protection module, helping to reduce the overall size of the single battery cell. The protection module is connected to the tabs via a flexible wire, which can adapt to irregular spaces within the casing of the electrical equipment, thereby improving the utilization rate of internal space and conforming to the trend of miniaturization of electrical equipment. Furthermore, the externally mounted protection module is electrically connected to a connector for electrical connection to an external terminal. Since the protection module is externally mounted within the receiving cavity of the casing, the flexibility of the connection method between the protection module and the connector is improved.

[0057] This application also provides an electrical device, including: a housing, a motherboard, and a battery assembly as described in any of the above embodiments. The motherboard and the battery assembly are disposed inside the housing, and the battery assembly is electrically connected to the motherboard via a connector 40.

[0058] In this embodiment, the structure of the battery assembly is the same as that of the battery assembly in any of the above embodiments, and its beneficial effects are similar, so they will not be described in detail here.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery assembly, characterized in that, include: A single battery cell (10) includes a casing (11) and a cell (12). The casing (11) has a receiving cavity (111). The cell (12) is disposed in the receiving cavity (111). The cell (12) includes tabs. The tabs are at least partially exposed outside the receiving cavity (111). A protection module (20) is disposed outside the receiving cavity (111); A connector (40) is electrically connected to the protection module (20) and is used for electrical connection with an external terminal; And a flexible conductor (30), the flexible conductor (30) having two opposing ends, one end of the flexible conductor (30) being electrically connected to the electrode tab, and the other end of the flexible conductor (30) being electrically connected to the protection module (20).

2. The battery assembly according to claim 1, characterized in that, The battery assembly also includes a flexible circuit board (50), one side of which is electrically connected to the protection module, and the connector is electrically connected to one side of the flexible circuit board.

3. The battery assembly according to claim 2, characterized in that, The flexible conductor (30) is electrically connected to the side of the flexible circuit board (50) away from the protection module (20).

4. The battery assembly according to claim 2, characterized in that, The protection module (20) includes at least one of a SIP module and a protection board.

5. The battery assembly according to claim 4, characterized in that, The SIP module includes a substrate, a molding compound, and a first component. The first component is disposed on the substrate. The molding compound covers the first component and at least a portion of the substrate. The substrate is soldered to the flexible circuit board (50). Alternatively, the protective board may include a printed circuit board and a second component, the second component being disposed on the side of the printed circuit board away from the flexible circuit board (50), and the printed circuit board being soldered to the flexible circuit board (50).

6. The battery assembly according to claim 1, characterized in that, The electrode includes a first electrode (121) and a second electrode (122). There are two protection modules (20) and two flexible wires (30). One protection module (20) is electrically connected to the first electrode (121) through one flexible wire (30), and the other protection module (20) is electrically connected to the second electrode (122) through another flexible wire (30).

7. The battery assembly according to claim 6, characterized in that, The flexible conductor (30) includes multiple flexible sub-conductors, one end of which is electrically connected to one of the protection modules (20), and the other end of which is electrically connected to one of the electrode tabs.

8. The battery assembly according to claim 6, characterized in that, The connector (40) is provided with signal pins. The connectors (40) on the two protection modules (20) are electrically connected to the external terminal through the signal pins, forming a power supply circuit for the protection module (20).

9. The battery assembly according to claim 1, characterized in that, The connection method between the flexible conductor (30) and the electrode includes at least one of welding, crimping, and splicing.

10. An electrical appliance, characterized in that, include: The housing, the motherboard, and the battery assembly according to any one of claims 1 to 9, wherein the motherboard and the battery assembly are disposed within the housing, and the battery assembly is electrically connected to the motherboard via the connector (40).

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