Power plug and battery pack

Abstract

The utility model relates to battery pack application technical field discloses a kind of power plug and battery pack.Power plug is used to be inserted with the power plug of outside, it includes, insulating shell, positive terminal and negative terminal, set on the insulating shell;Display module, set on the insulating shell;Control button, set on the insulating shell;Wherein, the display module, the control button respectively are equipped with communication interface, for with the communication connection of external battery management system;The display module is used to show the battery pack parameter provided by the battery management system;The control button is used for user to input parameter setting instruction to the battery management system.

Description

Technical Field

[0001] This utility model relates to the field of battery application technology, specifically to a power plug and a battery pack. Background Technology

[0002] With the widespread adoption of lithium-ion battery technology, its applications in power tools, drones, portable energy storage devices, and other fields are becoming increasingly common. These devices place higher demands on the battery packs that power them: not only do they need to have high-current discharge capabilities, but they also need to provide real-time, intuitive status monitoring and safety protection.

[0003] Currently, battery packs on the market typically connect to electrical devices via a simple discharge plug. These plugs (such as the common XT60 plug) have a relatively limited function, primarily serving as a physical connection and for current transmission. Key battery parameters, such as remaining charge (SOC), voltage, temperature, and number of cells in series, are usually monitored by a built-in battery management system (BMS). However, the display of these parameters has significant limitations: users often need to connect the battery pack to a dedicated charging device or use additional, separate testing equipment to read this information. When the battery pack is powering the electrical device, users cannot easily obtain these key parameters in real time.

[0004] The real-time invisibility of this state leads to obvious usage defects and security risks: Users cannot visually check the remaining battery power next to the device, making it difficult to predict the device's battery life, resulting in inconvenience and a poor user experience. When the battery pack experiences abnormal conditions such as overheating, overvoltage, or short circuits, users cannot receive timely alarm information due to the lack of a local human-machine interface. Although some BMS systems have the function of cutting off the circuit, users cannot confirm the status and set parameters on-site, nor can they receive early warnings before the circuit is cut off, posing a safety hazard.

[0005] Traditional discharge plugs are merely mechanical connectors, with size and current capacity being their primary, or even sole, considerations. They cannot meet users' advanced needs for intelligent and information-based battery packs, and their functions are limited. Summary of the Invention

[0006] One of the objectives of this utility model embodiment is to provide a power plug and a battery pack. By applying this technical solution, the battery status monitoring and display function is brought to the forefront of user operation—that is, the discharge plug itself, thereby realizing real-time visualization and on-site interaction of parameters in the working state, improving safety and user experience.

[0007] In a first aspect, the present invention provides a power plug for connecting and engaging with an external power plug, comprising: Insulating housing, The positive and negative terminals are disposed on the insulating housing; The display module is mounted on the insulating housing; Control buttons are located on the insulating housing; The display module and the control buttons are each equipped with a communication interface for communicating with an external battery management system. The display module is used to display the battery pack parameters provided by the battery management system; The control buttons are used for users to input parameter setting commands to the battery management system.

[0008] Optionally, the display panel of the display module is divided into at least two independent display areas, and each display area is configured to display at least two of the following information: battery type, dynamic power level, number of battery packs, voltage, power level, and temperature.

[0009] Secondly, embodiments of this utility model provide a battery pack, including a battery pack body and a battery pack management module, and further including... The power plug described above has its positive and negative terminals electrically connected to the positive and negative terminals of the battery pack body via wires. The display module of the power plug and the communication interface of the control buttons are respectively connected to the battery management system.

[0010] Optionally, the power plug is electrically connected to the battery pack body via a wire harness. The wire harness includes power wires and communication wires. The power wires electrically connect the positive and negative terminals to the positive and negative terminals of the battery pack body; The communication wire is used for communication connection between the display module and the control buttons and the battery management system.

[0011] Optionally, the wire harness is a flexible circuit board.

[0012] Optionally, the wire bundle includes at least three independent wires, two of which are power wires and at least one of which is a communication wire.

[0013] Optionally, it also includes, Timing circuit and key detection circuit, The timing circuit is electrically connected to the display module and is used to control the display module to turn off when the first preset time period is reached. The button detection circuit is electrically connected to the control button and the display module, and is used to control the display module to light up again when the control button is detected to be triggered.

[0014] Optionally, the battery management system includes a voltage sampling circuit, a temperature sampling circuit, a current sampling circuit, and a switching circuit; The switching circuit is connected in series between the positive and negative terminals of the battery pack body and the positive and negative terminals of the power plug. When one of the sampled values ​​of the voltage sampling circuit, temperature sampling circuit, or current sampling circuit exceeds its corresponding preset threshold, the switching circuit is in the off state.

[0015] Optionally, the control button is communicatively connected to the storage circuit and is used to generate a setting signal according to user operation to modify the preset threshold stored in the storage circuit.

[0016] Optionally, it also includes, The balance charging plug is electrically connected to the battery pack management system and is used to perform equal charging on each individual battery cell in the battery pack body.

[0017] As can be seen from the above, the smart power plug in this embodiment becomes an extension of the BMS module at the user end through the communication interface: the display module serves as the output interface, displaying battery parameters such as voltage and temperature provided by the BMS module in real time; the control buttons serve as the input interface, receiving user commands. This design allows users to simultaneously view the battery status and set parameters at the operating location while connecting electrical equipment, achieving the shortest interaction path and effectively solving the pain point of requiring dedicated equipment to view parameters in the background technology. This feature is particularly suitable for devices such as drones and power tools that require frequent plugging and unplugging or mobile use, allowing users to access information in real time without having to locate the battery pack itself.

[0018] This utility model embodiment upgrades the traditional discharge plug of the battery pack from a purely connecting component into an intelligent terminal that integrates status display and human-computer interaction functions, thereby enabling local monitoring and control of the battery pack near the electrical equipment, greatly improving the convenience and safety of use. Attached Figure Description

[0019] The accompanying drawings, which are provided to further illustrate the present invention and form part of this application, do not constitute an undue limitation of the present invention.

[0020] Figure 1 A three-dimensional structural diagram of an intelligent power plug provided for an embodiment of this utility model; Figure 2A three-dimensional structural diagram of a battery pack (display screen) provided for an embodiment of this utility model; Figure 3 , 4 A schematic diagram of the assembly structure of a battery management system module on a battery pack, provided for an embodiment of this utility model; Figure 5 A three-dimensional structural diagram of a battery pack (display module in non-operating state) provided for an embodiment of this utility model; Figure 6 A three-dimensional structural diagram of a battery pack (when the display module is working) provided for an embodiment of this utility model; Figure 7 This is a schematic diagram of the circuit principle of a battery pack provided for an embodiment of the present utility model.

[0021] 1: Power plug; 11: Positive terminal; 12: Negative terminal; 13: Insulating housing; 14: Display module; 15: Control buttons; 16: Guide groove; 17: Mating step; 18: Anti-slip strip; 19: Weight reduction holes; 2: BMS module; 21: Timing circuit; 22: Key detection circuit; 23: Voltage sampling circuit; 24: Temperature monitoring circuit; 25: Current monitoring circuit; 26: Switching circuit; 3: Battery pack body; 31: Individual battery cell; 32: Cable ties; 33: Plastic film; 4: Balance charging plug; 5: Wire harness. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Examples of embodiments of the present invention are shown in the accompanying drawings in a detailed description below, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0024] The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. In the description of the present invention, it should be understood that terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the present invention 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 limiting the present invention.

[0025] Furthermore, 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] See Figures 1-7 As shown in the figure. This utility model embodiment upgrades the traditional discharge plug of the battery pack from a purely connecting component into an intelligent terminal that integrates status display and human-computer interaction functions, thereby enabling local monitoring and control of the battery pack near the electrical equipment, greatly improving the convenience and safety of use.

[0028] This utility model embodiment provides a smart power plug 1, the core of which includes an insulating shell 13, and a positive terminal 11, a negative terminal 12, a display module 14, and a control button 15 integrated thereon. The display module 14 and the control button 15 are each provided with a communication interface (which can be an interface, a connector, or a solder pad for soldering wires) for establishing a communication connection with an external battery management system (BMS) module.

[0029] The smart power plug 1 serves as an extension of the BMS module 2 at the user end via a communication interface: the display module 14 acts as the output interface, displaying battery parameters such as voltage and temperature provided by the BMS module 2 in real time; the control buttons 15 act as the input interface, receiving user commands. This design allows users to simultaneously view the battery status and set parameters at the operating location while connecting electrical equipment, achieving the shortest interaction path and effectively solving the pain point of requiring dedicated equipment to view parameters in the background technology. This feature is particularly suitable for devices such as drones and power tools that require frequent plugging and unplugging or mobile use, allowing users to access information in real time without having to locate the battery pack itself 3.

[0030] The display module 14 can be an LCD screen, an OLED screen, or a segment LCD screen, depending on the cost and the complexity of the displayed content.

[0031] The control button 15 can be a physical button, a touch button, or a rotary encoder.

[0032] The communication interface can be a wired interface (such as UART, I2C serial communication) or a wireless interface (such as Bluetooth, Wi-Fi).

[0033] As a standalone component, the smart power plug 1 can be manufactured as a standard accessory, compatible with any BMS module 2 that has the corresponding communication protocol, and has significant market potential and application flexibility.

[0034] As a specific implementation of this embodiment, the insulating shell 13 of the power plug 1 can be structurally embodied in two forms: one is an insulating female plug with a cavity for the insertion of the insulating male plug at the opposite end; the other is an insulating male plug for insertion into the insulating female plug at the opposite end. The scope of protection of this utility model covers both forms simultaneously. Figures 1 to 6 The example shown is an insulated male connector.

[0035] To further improve the accuracy, safety, and user experience of the insertion operation, the following optimization design was made to the structure of the insulating housing 13 in this embodiment: Anti-reverse insertion guide structure: On the end face of the insulating shell 13 where it mates with the opposite plug, at least one of a guide groove 16 or a guide rib extending along the insertion direction is provided. Correspondingly, the opposite plug is provided with a matching guide rib or guide groove 16. This structure constitutes a physical error prevention mechanism, which can position the plug at the moment of insertion through the concave-convex fit, ensuring that the insertion direction is unique, fundamentally eliminating the risk of short circuits caused by reverse insertion, and guiding the terminals to be accurately aligned, making the insertion and removal process smoother.

[0036] Interlocking Depth Positioning Structure: As an illustration of this embodiment, for the implementation of an insulated male connector, its housing includes a front insertion end and a rear handheld end. The end of the insertion end has a mating step 17, the cross-sectional dimensions of which differ from the outer diameter of the handheld end. This step structure can mechanically limit the mating with the end face of the female connector, precisely defining the final insertion depth. This ensures proper contact of the power terminals and reliable connection, while also preventing damage to the housing or terminals that may be caused by over-insertion.

[0037] User-friendly operating structure: As illustrated in this embodiment, an anti-slip strip 18 is provided on the outer periphery of the handheld part at the rear end of the insulating shell 13. The anti-slip strip 18 significantly increases the friction between the user's hand and the shell, allowing the user to perform plugging and unplugging operations with ease and reliability even under adverse conditions such as moisture and oil, effectively preventing slippage and improving the product's practicality and user experience.

[0038] Lightweight and Material Optimization Structure: As an illustration of this embodiment, one or more weight-reducing holes 19 are also provided on the housing of the insulated male plug. This design effectively reduces the overall weight of the plug while ensuring sufficient structural strength of the housing, which is crucial for portable devices. At the same time, the weight-reducing holes 19 also reduce the amount of material used, helping to reduce production costs and conforming to the concept of green manufacturing.

[0039] The intelligent power plug 1 in this embodiment can be applied to the battery pack as the output plug of the battery pack, so as to connect and cooperate with the power plug 1 of the external electrical equipment to form a complete battery pack system.

[0040] The battery pack provided in this embodiment includes a battery pack body 3, a BMS module 2, and the aforementioned smart power plug 1. The power plug 1 is connected to the positive and negative terminals of the battery pack body 3 via wires to obtain electrical energy, and is connected to the BMS module 2 via a communication interface for data exchange.

[0041] The battery pack body 3 is composed of multiple battery cells 31, which are connected in series, parallel or a combination of series and parallel to form the required power module according to design requirements.

[0042] See Figures 3 to 6 As shown, during the assembly process, the individual battery cells 31 are first arranged side by side and securely bound together with fasteners such as strapping straps 32 to form a stable battery pack. Subsequently, at the electrode leads of each battery cell 31, the cells are connected according to a predetermined electrical connection relationship through busbar welding or soldering processes, ultimately forming a complete battery pack body 3 with a total positive electrode ("+") and a total negative electrode ("-").

[0043] In this embodiment, the BMS module 2 is installed at the electrode lead-out end of the battery pack body 3 and is directly electrically connected to the main positive and main negative terminals. The BMS module 2 also integrates and leads out a dedicated balance charging plug 4.

[0044] After the installation and circuit connection of BMS module 2 are completed, the entire assembly is encapsulated in a plastic film. Specifically, a plastic film 33 is used to cover the battery pack around its perimeter and both ends, thereby completely encapsulating the battery pack body 3, electrode connectors, and related circuit structures within it, achieving insulation, protection, and structural fixation.

[0045] This solution establishes a closed-loop system comprising the smart power plug 1, the battery itself, and the BMS module 2. The BMS module 2 acts as the "brain," responsible for monitoring, calculation, and control; the smart power plug 1 acts as the "senses and limbs," responsible for interaction and execution. The three work together to achieve a complete functional chain from parameter perception and processing to display. This embodiment transfers the status monitoring function from inside the charger or battery pack to the most frequently used discharge end, creating a "plug and play" user experience, giving the entire battery pack product a core competitive advantage in safety and ease of use.

[0046] This embodiment further provides the connection method between the plug and the battery pack and the implementation of the internal intelligent circuit.

[0047] In this embodiment, the power plug 1 is connected to the battery pack body 3 via a wire harness 5. The wire harness 5 has a clearly defined internal division of labor, integrating power wires responsible for transmitting electrical power and communication wires responsible for transmitting data signals. This design separates high-voltage and low-voltage circuits, reducing signal interference and improving system reliability.

[0048] As an illustration of this embodiment, the power plug 1 can also be connected to the battery pack body 3 via a flexible printed circuit board (FPC). FPCs offer higher integration and smaller size, making them suitable for applications with strict space requirements. See also... Figures 3-6 As shown, it can also be made by bundling together at least three independent insulated wires, which is the most basic and lowest cost implementation method.

[0049] As an illustration of this embodiment, a timing circuit 21 and a key detection circuit 22 (which may, but are not limited to, be located on the BMS module 2) are also provided within the battery pack. The timing circuit 21 is used to control the display module 14 to turn off to save energy after it has been working continuously (e.g., for 1-2 minutes) without operation. The key detection circuit 22, on the other hand, turns the screen back on when a key is detected to be pressed. This circuit structure achieves the energy-saving function of automatic screen-off and wake-up, effectively reducing the power consumption of the display module 14 in standby mode and extending the overall battery life of the battery pack. Compared with a purely software implementation, this invention offers greater protection of the object of the invention.

[0050] As an illustration of this embodiment, the BMS module 2 includes, but is not limited to, a voltage sampling circuit 23, a temperature monitoring circuit 24, a current monitoring circuit 25, and a switching circuit 26 connected in series in the main circuit. When any sampled value exceeds its corresponding preset threshold, the switching circuit 26 will cut off the power supply circuit and stop supplying power.

[0051] By monitoring key parameters in real time through the aforementioned hardware circuit, millisecond-level active power-off protection can be achieved the instant an anomaly (over-temperature, over-voltage, over-current) occurs, rather than relying on the user to discover the anomaly and then handle it, which greatly improves the safety factor.

[0052] As an illustration of this embodiment, the user can modify the preset protection threshold value stored in the storage circuit of the BMS module 2 via the control button 15 on the smart power plug 1. This allows the same battery pack to be adapted to cells from different manufacturers and with different performance characteristics, or to be personalized according to the user's specific usage scenario (such as high load or normal temperature environment), improving the product's versatility and flexibility.

[0053] As an illustration of this embodiment, the battery pack also includes a balanced charging plug 4 electrically connected to the BMS module 2. This balanced charging plug 4 allows the charger to perform balanced charging on each battery cell 31 within the battery pack, ensuring voltage consistency across all cells and thus extending the overall battery pack's lifespan and safety. Together with the intelligent discharge plug, it constitutes a complete battery pack charging and discharging management ecosystem.

[0054] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A power plug for mating with an external power plug, characterized in that, include, Insulating housing, The positive and negative terminals are disposed on the insulating housing; The display module is mounted on the insulating housing; Control buttons are located on the insulating housing; The display module and the control buttons are each equipped with a communication interface for communicating with an external battery management system. The display module is used to display the battery pack parameters provided by the battery management system; The control buttons are used for users to input parameter setting commands to the battery management system.

2. The power plug according to claim 1, characterized in that, The display panel of the display module is divided into at least two independent display areas, and each display area is configured to display at least two of the following information: battery type, dynamic power level, number of battery packs, voltage, power level, and temperature.

3. A battery pack, comprising a battery pack body and a battery pack management module, characterized in that, It also includes, The power plug according to claim 1 or 2, wherein the positive and negative terminals of the power plug are electrically connected to the positive and negative terminals of the battery pack body via wires; The display module of the power plug and the communication interface of the control buttons are respectively connected to the battery management system.

4. The battery pack according to claim 3, characterized in that, The power plug is electrically connected to the battery pack body via a wire harness. The wire harness includes power wires and communication wires. The power wires electrically connect the positive and negative terminals to the positive and negative terminals of the battery pack body; The communication wire is used for communication connection between the display module and the control buttons and the battery management system.

5. The battery pack according to claim 4, characterized in that, The lead wire bundle is a flexible circuit board.

6. The battery pack according to claim 4, characterized in that, The wire bundle includes at least three independent wires, two of which are power wires and at least one of which is a communication wire.

7. The battery pack according to claim 3, characterized in that, It also includes, Timing circuit and key detection circuit, The timing circuit is electrically connected to the display module and is used to control the display module to turn off when a first preset time period is reached. The button detection circuit is electrically connected to the control button and the display module, and is used to control the display module to light up again when the control button is detected to be triggered.

8. The battery pack according to claim 3, characterized in that, The battery management system includes a voltage sampling circuit, a temperature sampling circuit, a current sampling circuit, and a switching circuit. The switching circuit is connected in series between the positive and negative terminals of the battery pack body and the positive and negative terminals of the power plug. When one of the sampled values ​​of the voltage sampling circuit, temperature sampling circuit, or current sampling circuit exceeds its corresponding preset threshold, the switching circuit is in the off state.

9. The battery pack according to claim 8, characterized in that, The control buttons are communicatively connected to the storage circuit and are used to generate setting signals based on user operations to modify the preset threshold stored in the storage circuit.

10. The battery pack according to claim 3, characterized in that, It also includes, The balance charging plug is electrically connected to the battery pack management system and is used to perform equal charging on each individual battery cell in the battery pack body.

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