Bidirectional port spark-free hot-plug high-safety polymer lithium battery

Abstract

The present application relates to the technical field of lithium battery, disclose a kind of two-way port no spark hot plug high safety polymer lithium battery, including the following functional components: polymer cell module, flame-retardant insulating shell, Type-C interface component, low-temperature self-heating PCM system, BMS circuit board, short-circuit prevention self-locking alarm system, over-temperature prevention self-locking alarm system, false death repair system, NFC information monitoring and anti-fake traceability module, three-mode emergency alarm component, magnetic attraction positioning component, power display component, hot plug surge suppression module, virtual environment humidity measurement system, short-circuit prevention system, maintenance isolation system;The functional components adopt modular full-embedded design, hidden in the flame-retardant insulating shell inside.The present application is compatible with detachable battery, direct replacement is used, covers civilian, outdoor, industrial, security, small intelligent inventory equipment, without any equipment modification, can be adapted to various small unmanned aerial vehicles, the standardized battery compartment of intelligent robot dog, strong universality.

Description

Technical Field

[0001] This invention relates to the field of lithium battery technology, and in particular to a bidirectional, spark-free, hot-swappable polymer lithium battery with high safety. Background Technology

[0002] With the rise of the global trend towards repairable and intelligent consumer electronics, batteries for portable electronic devices, small IoT smart devices, and lightweight industrial equipment must support manual disassembly and replacement by users. Software locking of batteries is prohibited, and batteries are required to meet four compliance conditions: visible health status, traceability, publicly available carbon footprint, and recyclability upon disposal.

[0003] Currently, removable batteries on the market are mainly divided into three categories, none of which can meet the full-scenario usage needs of civilian, outdoor, and industrial small intelligent equipment, especially the operating conditions of precision equipment such as drones and robot dogs: Traditional original and imitation original batteries only have basic energy storage and power supply functions, without any intelligent protection or expansion functions, and charging depends on a dedicated charging dock; simple Type-C modified batteries simply have a Type-C interface soldered on an external part of a traditional battery. When devices are frequently plugged in and out for charging or battery swapping, they are prone to sparking, burning out delicate circuits and sensors, resulting in extremely low safety and making them unsuitable for use in precision intelligent equipment; ordinary intelligent batteries integrate some fast charging and protection functions, but are not optimized for scenarios involving frequent plugging and unplugging of dual ports in small intelligent devices, vibration conditions, and interference resistance of delicate circuits. The fluctuations during operation can easily interfere with the sensing and control systems of robot dogs and drones.

[0004] Existing technologies are all single-function improvements and have not been systematically optimized to address the pain points of removable batteries in various scenarios such as civilian, outdoor, industrial, and small intelligent equipment. In particular, they lack anti-interference, fluctuation-free, and high-environment adaptability technologies for precision intelligent equipment. Currently, there is no standardized intelligent removable battery solution in the industry that integrates universal structural adaptation, dual-port security protection, low-temperature and high-humidity environment adaptation, intelligent digital management and control, compliance traceability, seamless operation of precision equipment, and multi-functional expansion across all scenarios. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art by proposing a bidirectional, spark-free, hot-swappable polymer lithium battery with high safety.

[0006] To achieve the above objectives, the present invention adopts the following technical solution, comprising the following functional components: polymer battery cell module, flame-retardant insulating shell, Type-C interface component, low-temperature self-heating PCM system, BMS circuit board, short-circuit protection self-locking alarm system, over-temperature protection self-locking alarm system, dead-end repair system, NFC information monitoring and anti-counterfeiting traceability module, three-mode emergency alarm component, magnetic positioning component, power display component, hot-swap surge suppression module, virtual environment humidity measurement system, short-circuit protection system, and maintenance isolation system; the functional components adopt a modular fully embedded design and are hidden inside the flame-retardant insulating shell.

[0007] As a further description of the above technical solution: The Type-C interface component is integrally injection molded with the flame-retardant and insulating shell, including a Type-C female connector, a blind charging guide groove, and an elastic dustproof sheet; the elastic dustproof sheet is integrally molded with the same material as the shell and completely seals the interface under normal conditions; the Type-C female connector adopts a flush-embedded installation, is completely flush with the surface of the shell, and can be fixed in any of three positions: any side of the battery, the same side as the electrode contacts, or around the electrode contact surface.

[0008] As a further description of the above technical solution: The low-temperature self-heating PCM system is bonded to the surface of the polymer cell, with the bonding area fully covering the effective heating area of ​​the cell. It consists of a low-temperature sampling chip and a PCM heating film. The low-temperature sampling chip monitors the ambient temperature in real time. When the ambient temperature is <0℃ and the device is in charge / discharge operation, it automatically starts the PCM heating film to maintain a constant temperature, raising the battery operating temperature to 10℃ and then stopping the temperature operation.

[0009] As a further description of the above technical solution: The BMS circuit board includes a safety protection unit, an intelligent fast charging unit, a sleep / wake-up unit, and a voltage fluctuation regulator unit; The safety protection unit provides comprehensive protection against overcurrent, overvoltage, undervoltage, short circuit, high and low temperatures, overcharge and over-discharge, and reverse connection. The intelligent fast charging unit is compatible with mainstream fast charging protocols such as PD / QC / UFCS and supports temperature control and current limiting. The sleep / wake-up unit achieves ultra-low power standby with a standby current of <10μA, automatically enters sleep mode when there is no charging or discharging for a long time, and wakes up in seconds when triggered. The voltage fluctuation stabilization unit identifies contact vibrations and voltage fluctuations between the battery and the device in real time, and automatically smooths and stabilizes the output voltage.

[0010] As a further description of the above technical solution: The short-circuit protection self-locking alarm system monitors the electrode output status in real time, cuts off the short-circuit fault output within 1μs and triggers a red and blue flashing alarm. After the fault is cleared, it can be unlocked by plugging and unplugging the charging cable. The over-temperature protection self-locking alarm system has built-in multiple temperature sensors and is set with three levels of temperature control logic: automatic current reduction at 38℃, low current operation and alarm at 45℃, and forced lockout of all functions at 50℃. It automatically recovers after the temperature drops back to the safe threshold.

[0011] As a further description of the above technical solution: The apparent death repair system automatically activates the micro-current wake-up mode when the battery voltage is below 2.0V, and switches to regular charging after the voltage rises back to 3.0V; the NFC information monitoring and anti-counterfeiting traceability module has a built-in passive NFC tag, which can read real-time power, cycle count, battery health, carbon footprint and unique encryption key offline.

[0012] As a further description of the above technical solution: The three-mode emergency alarm component supports three modes: constant illumination, SOS flashing, and red-blue fault strobe flashing. The strobe flashing is automatically triggered when a fault occurs. The magnetic positioning component has permanent magnets embedded in the symmetrical and narrow surfaces of the battery contacts. The power display component achieves linear and non-jumping power display, with a red light flashing as a warning when the power is 10%, power-off protection when the power is 5%, and a constant red light when the lifespan decreases to 75%.

[0013] As a further description of the above technical solution: The hot-plug surge suppression module uses the existing energy storage capacitor, discharge resistor, and current-limiting wiring hardware of the BMS. It achieves protection through circuit topology reconstruction, partition impedance optimization, and nanosecond-level discharge logic. It consists of a current-limiting buffer circuit, a voltage-following voltage regulation branch, and a surge discharge circuit, achieving surge-free and spark-free operation in both electrode hot-plugging and Type-C cable plugging / unplugging scenarios.

[0014] As a further description of the above technical solution: The virtual environmental humidity measurement system uses existing lithium battery hardware for NTC temperature sampling, electrode impedance sampling, BMS leakage current sampling, and cell internal resistance sampling. It calculates the relative humidity of the environment through a four-dimensional coupled mathematical model of temperature, resistance, leakage, and temperature change rate, with a detection accuracy of ±5%RH. The short-circuit protection system predicts the risk of condensation based on virtual humidity and temperature data and automatically starts micro-current preheating and low-power air drying modes.

[0015] As a further description of the above technical solution: The maintenance isolation system has millisecond-level identification logic for online and offline equipment: when the equipment is working online, all active balancing, micro-discharge, and pre-drying maintenance actions are paused to ensure a clean and stable power supply; when the equipment is offline and stationary, humidity-linked balancing discharge, differential pressure correction, and moisture-proof maintenance functions are automatically activated.

[0016] The present invention has the following beneficial effects: 0. This invention is compatible with removable batteries, allowing for direct replacement and immediate use. It covers civilian, outdoor, industrial, security, and small intelligent existing devices without any equipment modification. It can be adapted to the standardized battery compartments of various small drones and intelligent robot dogs, making it highly versatile. It is compatible with mainstream fast charging protocols, supports reverse emergency power supply, and achieves active moisture and short-circuit protection through zero-hardware virtual humidity detection. It provides seamless equipment maintenance without interfering with the operation of the precision control system of drones and robot dogs.

[0017] 0. This invention integrates multiple protections including 0.1C low-current dead repair, long-term static sleep wake-up, intelligent temperature-controlled charging, fluctuation voltage regulation, and aging self-adaptation, reducing equipment operation and maintenance and replacement costs; NFC full-information monitoring of battery remaining power, remaining usage time, temperature and humidity, health status, remaining usage times, carbon footprint, carbon emissions, battery recycling, and electronic user manual, realizing digital traceability of the entire battery life cycle; and a unique encryption key to prevent counterfeiting and refurbishment.

[0018] 0. This invention integrates bidirectional fast charging, cross-model reverse emergency power supply, three-mode emergency lighting, magnetic positioning, and safe hot-swappable battery swapping into one multi-functional device. It is suitable for various scenarios such as daily civilian use, outdoor adventure, industrial inspection, aerial inspection of smart devices, and emergency rescue. It is versatile and highly practical. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0020] To address the problems in the background technology, this application presents a bidirectional, spark-free, hot-swappable, high-safety polymer lithium battery, comprising a polymer cell module, a flame-retardant insulating shell, a Type-C interface component, a low-temperature self-heating PCM system, a BMS circuit board, a short-circuit self-locking alarm system, an over-temperature self-locking alarm system, a dead battery repair system, an NFC information monitoring and anti-counterfeiting traceability module, a three-mode emergency alarm component, a magnetic positioning component, a power display component, a hot-swappable surge suppression module, a virtual ambient humidity measurement system, a short-circuit protection system, and a maintenance isolation system. All functional components adopt a modular, fully embedded design, hidden inside the flame-retardant insulating shell, with no exposed protruding structures. The flame-retardant insulating shell has the same dimensions and electrode contacts as the Nokia BL-5C / BL-5B / BL-4C series of removable batteries, and can directly replace existing BL-5C / BL-5B / BL-4C batteries and other battery devices. It can replace the original batteries of various compatible devices such as civilian and outdoor lighting fixtures, industrial handheld terminals, security inspection equipment, small drones, intelligent robot dogs, and robots, without requiring any structural modifications to the device.

[0021] Furthermore, the polymer battery module uses high-energy-density, high-stability polymer batteries, adaptable to multiple sizes, and meets the diverse capacity requirements of civilian, outdoor, industrial, and small smart devices. The battery cell is 100% fully wrapped with a flame-retardant insulating film, without gaps or movement, providing excellent pressure resistance, bulging prevention, insulation, and flame retardancy.

[0022] Furthermore, the flame-retardant insulating shell achieves a UL94V-0 flame-retardant rating, providing fire resistance, impact resistance, aging resistance, and resistance to high and low temperatures. The inner wall of the shell is 100% tightly fitted to the outer surface of the polymer battery cell, with no gaps, resulting in a stable and shock-resistant overall structure. The shell surface features a non-slip frosted finish, ensuring a secure grip and preventing it from easily slipping off.

[0023] Furthermore, the Type-C interface component is integrally injection molded with the shell, resulting in a seamless design. It includes a Type-C female connector, a blind charging guide groove, and a flexible dustproof sheet. The flexible dustproof sheet is integrally molded from the same material as the shell, ensuring it will never detach or age. Under normal conditions, it completely seals the interface, providing dust, water, and oxidation protection. It automatically springs back under pressure when plugged in and instantly resets after unplugging. The Type-C female connector uses a flush-mount installation, completely flush with the shell surface, without protrusions, jamming, or affecting the assembly and operation of drones, robotic dogs, and other compact devices. The Type-C female connector can be flexibly fixed in three positions: any side of the battery, on the same side as the electrode contacts, or around the electrode contacts, providing full coverage and adapting to battery compartments of various small smart devices and outdoor industrial equipment. The interface supports bidirectional charging and discharging and cross-model reverse emergency power supply. It features a built-in automatic load identification and current limiting circuit, intelligently identifying devices with different power ratings, such as mobile phones, headphones, small lights, industrial sensors, drones, and robotic dogs, and accurately matching the output current. It also incorporates a dedicated surge suppression and spark elimination circuit for the Type-C port with zero hardware requirements. No additional components are needed; the problem of high voltage surges, contact arcing, and sparks during cable insertion and removal is solved simply by reconstructing the original BMS circuit topology, optimizing impedance, and implementing nanosecond-level discharge logic.

[0024] Furthermore, the low-temperature self-heating PCM system is tightly bonded to the surface of the polymer battery cell, with the bonding area fully covering the effective heat-generating area of ​​the cell. It consists of a low-temperature sampling chip and a PCM heating film. The low-temperature sampling chip monitors the ambient temperature in real time at the millisecond level. When the ambient temperature is <0℃ and the device is in charge / discharge operation, the PCM heating film automatically starts to maintain a constant temperature, quickly raising the battery operating temperature to 10℃ and then precisely stopping the temperature control. This constant temperature control eliminates the risk of overheating and can increase the effective battery capacity by approximately 30% in low-temperature environments.

[0025] Furthermore, the BMS circuit board integrates four core functional units, making it suitable for all operating conditions, including civilian, outdoor, industrial, and small intelligent device scenarios: Safety protection unit: Provides comprehensive protection against overcurrent, overvoltage, undervoltage, short circuit, high and low temperatures, overcharge and over-discharge, and reverse connection, adapting to the safe operating conditions of precision equipment; Intelligent fast charging unit: compatible with mainstream fast charging protocols such as PD / QC / UFCS, supports temperature control and current limiting, and ensures safe fast charging without damaging the battery cell; Sleep and wake-up unit: achieves ultra-low power standby with standby current <10μA, automatically enters sleep mode when there is no charging or discharging for a long time, and wakes up in seconds when triggered by operation, preventing the equipment from being scrapped due to power depletion after long-term static storage; Fluctuation voltage regulator unit: Real-time identification of contact vibration and voltage fluctuation between battery and equipment, automatic smoothing and stabilizing output, completely solving the problems of power supply fluctuation, equipment interruption and stoppage, unexpected restart and operation failure caused by vibration of drone flight and robot dog walking.

[0026] Furthermore, the short-circuit self-locking alarm system monitors the electrode output status in real time at high frequency. Once a short-circuit fault is detected, the charging and discharging output is instantly cut off within 1μs, and the side LED red and blue flashing alarm is activated simultaneously, locking the fault and preventing accidental restart. After the fault is cleared, it can be manually unlocked by unplugging and replugging the charging cable.

[0027] Furthermore, the over-temperature self-locking alarm system incorporates multiple temperature sensors to simultaneously monitor cell and circuit board temperatures, and features three levels of precise temperature control logic to adapt to all operating conditions, including high and low temperatures. Over-temperature 38℃: Automatically reduces charging current, gently cools down, and continues to work without interrupting equipment operation; Over-temperature of 45℃: Switches to low-current safe operation mode and triggers red and blue light alarm to indicate potential high temperature hazard; Over 50℃: Forcefully locks all charging and discharging functions to prevent the risk of high-temperature fire and battery cell bulging; It will automatically resume normal operation after the temperature drops back to the safe threshold.

[0028] Furthermore, when the battery enters a dormant state due to prolonged inactivity or deep over-discharge causing the voltage to drop below 2.0V, the apparent death repair system automatically activates a 0.1C micro-current wake-up mode after connecting to a charging power source. This mode gently replenishes the battery with a small current. Once the voltage rises back to the safe threshold of 3.0V, the system automatically switches to the normal charging mode, without requiring any professional equipment for activation.

[0029] Furthermore, the NFC information monitoring and anti-counterfeiting traceability module incorporates a passive NFC tag, requiring no battery power, remaining permanently effective, and capable of independent offline operation. Through a mobile phone's NFC function, it can read: real-time battery level, remaining usage time, cycle count, battery health, real-time temperature and humidity, carbon emissions, carbon footprint, electronic instruction manual, and a unique encryption key. Employing advanced encryption algorithms, it achieves offline anti-counterfeiting verification and full lifecycle recycling traceability; it also includes a unique recycling code, which users scan to recycle batteries and receive a rebate, thus enabling battery recycling.

[0030] Furthermore, the three-mode emergency alarm component features high-brightness LED beads embedded in the side of the battery, supporting three working modes: constant lighting, SOS strobe, and red-blue fault flashing. When the battery experiences a short circuit, overheating, or reverse connection fault, power is cut off, automatically triggering a red-blue flashing alarm; it also supports manual switching between lighting and SOS rescue modes.

[0031] Furthermore, the magnetic positioning component embeds permanent magnets at two positions: the symmetrical plane and the narrow plane of the battery contacts. It has no exposed structure, no protrusions, and does not affect equipment assembly or operation. It enables magnetic absorption of batteries, rapid alignment and installation of outdoor smart devices, and magnetic fixation of faulty equipment.

[0032] Furthermore, a three-segment LED indicator is located next to the Type-C interface of the power display component. Equipped with a dedicated voltage regulation algorithm, it eliminates voltage fluctuation interference, achieving linear, seamless power level display without any false or sudden drops in battery level. The core warning logic includes: a breathing red light flashing warning when the battery level is below 10%, alerting the smart device to return to home mode or shut down; automatic power-off protection at 5% extremely low battery; and a solid red light when the battery life degrades to 75%, prompting for battery replacement.

[0033] Furthermore, the hot-swap surge suppression module is an innovative protection technology specifically designed for removable battery swapping scenarios. It requires zero new components, zero cost, and zero structural modifications throughout the entire process, fully reusing the existing BMS energy storage capacitors, discharge resistors, and current-limiting wiring hardware. Protection is achieved through circuit topology reconstruction, partitioned impedance optimization, and nanosecond-level discharge logic. The core consists of a current-limiting buffer circuit, a voltage-following regulation branch, and a surge discharge circuit, providing a purely hardware-linked response without software intervention, achieving a nanosecond-level response speed. This completely solves the problems of high-voltage surges, electrical sparks, and voltage drops during the initial power-on and power-off plug-in / plug-out of traditional removable batteries, enabling drones and robotic dogs to perform hot-swap battery swaps without black screens, restarts, or circuit breakdowns.

[0034] Furthermore, the virtual environmental humidity measurement system fully reuses existing battery hardware for NTC temperature sampling, electrode impedance sampling, BMS leakage current sampling, and cell internal resistance sampling. It eliminates the need for additional humidity sensors, saving space within the small device. Through a four-dimensional coupled humidity mathematical model of temperature, resistance, leakage current, and temperature change rate, it accurately calculates ambient relative humidity with a detection accuracy of ±5%RH. It supports adaptive calibration in both open outdoor environments and enclosed equipment environments.

[0035] Furthermore, the short-circuit protection system uses AI to intelligently predict critical conditions of low temperature and high humidity condensation based on virtual humidity data and real-time temperature data. When condensation is detected, it automatically activates a micro-current uniform preheating and low-power drying mode to gently evaporate the invisible moisture on the battery surface and contacts, thus preventing condensation, oxidation, and micro-short circuit faults at the source.

[0036] Furthermore, the maintenance isolation system features a unique online and offline millisecond-level identification logic, completely resolving industry pain points such as voltage fluctuations and interference with the precision sensing and control systems of drones and robotic dogs caused by traditional battery maintenance actions. Equipment in online working state: All active balancing, micro-discharge, and pre-drying maintenance actions are suspended to ensure a clean and stable power supply, with no voltage fluctuations or signal interference, and zero misjudgments, zero errors, and zero operation interruptions for drones and robot dogs; When the device is offline and stationary: It automatically activates humidity-linked equalization discharge, differential pressure correction, and moisture-proof maintenance functions to autonomously complete battery maintenance and delay battery aging.

[0037] In one specific embodiment, a smart polymer lithium battery compatible with Nokia BL-5C series batteries is used; it adopts 403445 specification polymer cells, and the flame-retardant insulating shell dimensions are completely consistent with BL-5C (53.00×34.00×5.00mm), and the electrode contacts are completely matched with the original BL-5C; the Type-C interface is installed on the side of the battery; it has a built-in low-temperature self-heating PCM system, a full-function BMS, a short-circuit over-temperature self-locking alarm system, a long-term no-charge / discharge sleep wake-up module, a 0.1C fake death repair system, a passive NFC module, a three-mode emergency alarm component, a dual-position magnetic structure, a zero-hardware dual-port surge suppression module, and a zero-hardware virtual humidity detection system.

[0038] This embodiment can directly and without damage replace the original BL-5C batteries in civilian devices such as Nokia feature phones, small Bluetooth speakers, portable flashlights, and home access control devices; it supports PD / QC / UFCS fast charging, charging to 80% in 30 minutes; it maintains over 70% capacity in low-temperature environments down to -10℃; it can also provide emergency power to small peripherals such as Bluetooth headsets and smartwatches; in the event of a sudden power outage at home, the batteries can be removed from the devices to light up individual lights, which can be placed in different rooms for continuous emergency lighting for over 10 hours; it supports safe hot-swappable battery replacement; NFC can read all battery temperature, humidity, and health data; and it automatically pre-dries and prevents moisture in high-humidity environments, effectively solving long-term malfunction problems in household and small outdoor devices.

[0039] In one specific embodiment, a smart battery solution adapted for small aerial photography drones is provided. It utilizes polymer cells of industry-standard specifications common to small aerial photography drones, with the shell size strictly matching the standard built-in battery compartment of various mini aerial photography drones and portable foldable small drones, requiring no modification to the drone's body, frame, or circuit structure. The Type-C interface uses flush-mounted embedded electrode contacts, fitting the drone's compact and lightweight design without obstructing sensors, positioning modules, or assembly structures, and without protrusions or interference. It fully incorporates all the core functions of this invention, specifically optimized for high-frequency start / stop, flight vibration, outdoor high and low temperature, high humidity aerial photography, and frequent battery swapping conditions. It integrates a low-temperature self-heating system, zero-hardware dual-port surge suppression, virtual humidity detection, condensation pre-drying, seamless equipment maintenance, NFC traceability, fault alarm, magnetic positioning, sleep / wake-up, and a complete set of intelligent protection functions including 0.1C deadlock repair.

[0040] This embodiment is precisely adapted to the core application scenarios of mini aerial photography drones, foldable portable drones, small outdoor inspection drones, and low-altitude mapping micro drones. Small drones are precision aerial photography equipment with extremely high requirements for power supply stability, circuit safety, and environmental adaptability. Traditional battery-powered battery swapping and charging / unplugging are prone to generating surges and sparks, which can easily damage the drone's flight control motherboard, positioning sensors, and high-definition camera module, leading to flight loss of control, image lag, and equipment failure. At the same time, under outdoor vibration conditions, power supply fluctuations, flight shaking, and accidental crashes are likely to occur. This solution uses dual-port zero-hardware surge suppression technology to achieve spark-free, current-instantaneous, and voltage-drop-free battery swapping and Type-C charging / unplugging during drone startup, supporting uninterrupted aerial photography operations and eliminating equipment failures and operation interruptions caused by battery swapping and charging operations. Addressing the harsh operating conditions of drones in outdoor high-altitude operations, winter low temperatures, high altitudes, coastal high humidity, and rain, snow, and dust, the low-temperature self-heating system can maintain stable operation in temperatures as low as -15℃, solving industry pain points such as low-temperature power loss, inability to take off, and sudden reduction in range associated with ordinary batteries. The virtual humidity detection and condensation pre-drying system can eliminate hidden moisture inside the battery compartment in real time, preventing hidden faults such as flight failure, camera blur, and positioning drift caused by high-altitude temperature differences leading to condensation, contact oxidation, and micro-short circuits. Simultaneously, the unique equipment-invisible maintenance mechanism can pause maintenance actions during drone flight, aerial photography, and operations, outputting a pure and stable voltage, eliminating flight control misjudgments, image flickering, and flight lag caused by maintenance fluctuations. When the equipment is placed on the ground and stationary, it automatically initiates anti-moisture maintenance, cell voltage differential balancing, and low-power repair, significantly extending battery cycle life and reducing drone maintenance costs. The device comes with SOS emergency flashing and fault strobe alarm functions, providing rapid alarms when drones experience flight malfunctions or battery abnormalities, making it suitable for outdoor aerial photography emergency search and rescue and equipment retrieval scenarios. Its unique NFC encrypted traceability enables unified management, anti-counterfeiting traceability, and health monitoring of batch drone batteries, perfectly solving the industry problems of poor safety, unstable power supply, low temperature failure, high humidity failure, and lack of compliant traceability in traditional drone batteries, and enabling battery recycling rebates.

[0041] In one specific embodiment, a smart battery solution adapted for small intelligent robot dogs is provided. It utilizes industry-standard ultra-thin, highly stable polymer cells commonly used in small intelligent robot dogs, precisely adapting to the built-in battery compartments of mini inspection robot dogs, small educational robot dogs, and outdoor detection robot dogs. No equipment modification is required, and the sealed, waterproof structure of the robot body is not affected. The Type-C interface is flush-mounted with embedded components on all four sides, meeting the requirements of lightweight and compact device design. It fully incorporates all the innovative functions of this invention, specifically optimizing for continuous walking vibration, high-frequency start / stop, all-weather outdoor inspection, and precision sensing anti-interference conditions. It integrates dual-port sparkless surge protection, low-temperature self-heating, virtual humidity detection, contactless maintenance, accurate power display, NFC traceability, and a complete set of three-mode emergency alarm functions.

[0042] This embodiment is primarily designed for small intelligent inspection robot dogs, mini educational robot dogs, outdoor detection robot dogs, and indoor security robot dog devices. Intelligent robot dogs are equipped with numerous precision sensors, walking control modules, and data acquisition modules, requiring extremely high purity, stability, and safety of power supply. Traditional robot dog-specific battery charging and hot-plugging / battery swapping easily generate surge currents and electrical sparks, which can easily damage sensor chips and control motherboards, leading to robot dog sluggishness, steering failure, data acquisition distortion, and device crashes and restarts. Furthermore, robot dogs operate for extended periods in ground-based, outdoor, and humid environments, making batteries highly susceptible to moisture oxidation, condensation, and short circuits, resulting in hidden faults. This solution employs zero-hardware dual-port surge suppression technology to completely eliminate the inrush currents and electrical sparks from charging, discharging, plugging / plugging, and hot-plugging / battery swapping, providing comprehensive protection for the robot dog's precision circuitry and sensing system, and preventing device malfunctions and data anomalies. Designed for outdoor inspections, coastal operations during the rainy season, and low-temperature autumn and winter, the virtual humidity measurement system can monitor the ambient humidity of the cavity in real time. AI predicts the risk of condensation and initiates micro-current pre-drying to remove moisture from the battery and body contacts, fundamentally solving common problems such as battery oxidation, leakage, startup failure, and operation interruption caused by damp ground and open-air storage. A built-in high-precision voltage fluctuation stabilization unit can offset voltage fluctuations caused by the robot's movement vibrations and frequent start-stop cycles, ensuring stable operation throughout the device's movement, sensor detection, and data transmission, without any lag or malfunction. The low-temperature self-heating function ensures normal startup and continuous operation even at -10℃, solving the problem of ordinary batteries failing to operate due to low-temperature discharge. The core seamless maintenance mechanism silently pauses all maintenance actions during robot operation, data acquisition, and movement, ensuring absolutely pure and stable power supply and preventing interference and misjudgments in precision sensing and control systems. When the device is in standby mode, it automatically initiates moisture-proof maintenance, cell balancing, and aging repair, significantly improving battery durability and device stability. The precise linear power display can accurately predict the remaining working time of the robot dog, preventing shutdowns due to false power; the dual-position magnetic structure facilitates equipment maintenance, disassembly and assembly, and outdoor storage and fixation; the cross-model reverse emergency power supply can temporarily charge the portable inspection equipment and mobile phone, making it suitable for outdoor emergency operation scenarios. Its comprehensive performance, safety and stability far exceed those of traditional robot dog-specific batteries and ordinary modified batteries on the market.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bidirectional, spark-free, hot-swappable, high-safety polymer lithium battery, characterized in that, It includes the following functional components: polymer cell module, flame-retardant insulating shell, Type-C interface component, low-temperature self-heating PCM system, BMS circuit board, short-circuit protection self-locking alarm system, over-temperature protection self-locking alarm system, dead repair system, NFC information monitoring and anti-counterfeiting traceability module, three-mode emergency alarm component, magnetic positioning component, power display component, hot-swap surge suppression module, virtual environment humidity measurement system, short-circuit protection system, and maintenance isolation system; the functional components adopt a modular fully embedded design and are hidden inside the flame-retardant insulating shell.

2. The bidirectional, spark-free, hot-swappable, high-safety polymer lithium battery according to claim 1, characterized in that, The Type-C interface component is integrally injection molded with the flame-retardant and insulating shell, including a Type-C female connector, a blind charging guide groove, and an elastic dustproof sheet; the elastic dustproof sheet is integrally molded with the same material as the shell and completely seals the interface under normal conditions; the Type-C female connector adopts a flush-embedded installation, is completely flush with the surface of the shell, and can be fixed in any of three positions: any side of the battery, the same side as the electrode contacts, or around the electrode contact surface.

3. A bidirectional, spark-free, hot-swappable, high-safety polymer lithium battery according to claim 2, characterized in that, The low-temperature self-heating PCM system is bonded to the surface of the polymer cell, with the bonding area fully covering the effective heating area of ​​the cell. It consists of a low-temperature sampling chip and a PCM heating film. The low-temperature sampling chip monitors the ambient temperature in real time. When the ambient temperature is <0℃ and the device is in charge / discharge operation, it automatically starts the PCM heating film to maintain a constant temperature, raising the battery operating temperature to 10℃ and then stopping the temperature operation.

4. A bidirectional, spark-free, hot-swappable, high-safety polymer lithium battery according to claim 3, characterized in that, The BMS circuit board includes a safety protection unit, an intelligent fast charging unit, a sleep / wake-up unit, and a voltage fluctuation regulator unit; The safety protection unit provides comprehensive protection against overcurrent, overvoltage, undervoltage, short circuit, high and low temperatures, overcharge and over-discharge, and reverse connection. The intelligent fast charging unit is compatible with mainstream fast charging protocols such as PD / QC / UFCS and supports temperature control and current limiting. The sleep / wake-up unit achieves ultra-low power standby with a standby current of <10μA, automatically enters sleep mode when there is no charging or discharging for a long time, and wakes up in seconds when triggered. The voltage fluctuation stabilization unit identifies contact vibrations and voltage fluctuations between the battery and the device in real time, and automatically smooths and stabilizes the output voltage.

5. A bidirectional, spark-free, hot-swappable, high-safety polymer lithium battery according to claim 4, characterized in that, The short-circuit protection self-locking alarm system monitors the electrode output status in real time, cuts off the short-circuit fault output within 1μs and triggers a red and blue flashing alarm. After the fault is cleared, it can be unlocked by plugging and unplugging the charging cable. The over-temperature protection self-locking alarm system has built-in multiple temperature sensors and is set with three levels of temperature control logic: automatic current reduction at 38℃, low current operation and alarm at 45℃, and forced lockout of all functions at 50℃. It automatically recovers after the temperature drops back to the safe threshold.

6. A bidirectional, spark-free, hot-swappable, high-safety polymer lithium battery according to claim 5, characterized in that, The apparent death repair system automatically activates the micro-current wake-up mode when the battery voltage is below 2.0V, and switches to regular charging after the voltage rises back to 3.0V; the NFC information monitoring and anti-counterfeiting traceability module has a built-in passive NFC tag, which can read real-time power, cycle count, battery health, carbon footprint and unique encryption key offline.

7. A bidirectional, spark-free, hot-swappable, high-safety polymer lithium battery according to claim 6, characterized in that, The three-mode emergency alarm component supports three modes: constant illumination, SOS flashing, and red-blue fault strobe flashing. The strobe flashing is automatically triggered when a fault occurs. The magnetic positioning component has permanent magnets embedded in the symmetrical and narrow surfaces of the battery contacts. The power display component achieves linear and non-jumping power display, with a red light flashing as a warning when the power is 10%, power-off protection when the power is 5%, and a constant red light when the lifespan decreases to 75%.

8. A bidirectional, spark-free, hot-swappable, high-safety polymer lithium battery according to claim 7, characterized in that, The hot-plug surge suppression module uses the existing energy storage capacitor, discharge resistor, and current-limiting wiring hardware of the BMS. It achieves protection through circuit topology reconstruction, partition impedance optimization, and nanosecond-level discharge logic. It consists of a current-limiting buffer circuit, a voltage-following voltage regulation branch, and a surge discharge circuit, achieving surge-free and spark-free operation in both electrode hot-plugging and Type-C cable plugging / unplugging scenarios.

9. A bidirectional, spark-free, hot-swappable, high-safety polymer lithium battery according to claim 8, characterized in that, The virtual environmental humidity measurement system uses existing lithium battery hardware for NTC temperature sampling, electrode impedance sampling, BMS leakage current sampling, and cell internal resistance sampling. It calculates the relative humidity of the environment through a four-dimensional coupled mathematical model of temperature, resistance, leakage, and temperature change rate, with a detection accuracy of ±5%RH. The short-circuit protection system predicts the risk of condensation based on virtual humidity and temperature data and automatically starts micro-current preheating and low-power air drying modes.

10. A bidirectional, spark-free, hot-swappable, high-safety polymer lithium battery according to claim 9, characterized in that, The maintenance isolation system has millisecond-level identification logic for online and offline equipment: when the equipment is working online, all active balancing, micro-discharge, and pre-drying maintenance actions are paused to ensure a clean and stable power supply; when the equipment is offline and stationary, humidity-linked balancing discharge, differential pressure correction, and moisture-proof maintenance functions are automatically activated.