A lithium battery long-lasting endurance hand gun drill

Abstract

This invention discloses a long-lasting lithium-ion battery hand drill, belonging to the field of power tool technology. The technical solution adopted by this invention is as follows: a long-lasting lithium-ion battery hand drill includes a working condition identification module, a multi-mode power supply control module, a lithium battery management module, and a human-machine interaction module. These modules are interconnected to form a closed-loop control link. The working condition identification module collects real-time working condition data, providing a basis for determining power supply mode switching. The multi-mode power supply control module includes a core controller and a voltage and current adjustment unit, used to configure multiple power supply modes adapted to different working conditions. It can dynamically adjust the lithium battery output parameters according to working condition data or user commands, realizing automatic or manual switching of power supply modes. The lithium battery management module monitors the working status of the lithium battery, realizing cell balancing and charge / discharge protection. This invention optimizes lithium battery use by dynamically adjusting the power supply mode, improving lithium battery endurance, reducing energy waste, and minimizing battery damage.

Description

Technical Field

[0001] This invention belongs to the field of power tool technology, specifically relating to a long-lasting lithium battery-powered hand drill. Background Technology

[0002] Lithium-ion battery-powered hand drills have become key tools in modern work scenarios due to their portability and cordless operation advantages, and their battery life directly affects work efficiency and user experience. However, current technical solutions have significant shortcomings in optimizing lithium battery power supply, resulting in actual battery life performance that fails to meet practical needs.

[0003] Existing lithium-ion hand drills generally use fixed power output or limited range adjustment modes in their power supply systems, lacking the ability to dynamically adapt to working conditions. Under light-load conditions such as tightening screws or drilling soft materials, the actual power required by the motor is far lower than the battery output power, causing a large amount of electrical energy to be wasted as heat. This not only wastes valuable electricity but also increases the burden of ineffective battery discharge. Under heavy-load conditions such as drilling hard metals or concrete, insufficient power supply parameter adaptation can easily cause the motor to stall, forcing the lithium battery to output abnormally large currents, resulting in overcurrent discharge. This instantly consumes a large amount of electricity and accelerates damage to the internal battery structure, leading to irreversible capacity degradation over long-term use.

[0004] The limitations of the operating condition identification process further exacerbate this problem. Existing equipment mostly relies on a single sensor to collect data and lacks a multi-source information fusion processing mechanism. There are delays and inaccuracies in the perception of key parameters such as load torque, motor speed, and output current, making it impossible for the power supply system to respond to sudden changes in operating conditions in a timely manner. For example, when switching from drilling wood to light-load operations, the battery continues to maintain a high-power discharge state, resulting in continuous power waste; when switching from soft materials to hard materials, the discharge power fails to increase rapidly, affecting the smoothness of operation and increasing the internal energy consumption of the battery due to forced discharge.

[0005] Furthermore, redundant power generated during operation is not effectively utilized. Existing solutions either directly waste this energy or attempt to recharge the battery through complex energy conversion structures. However, the conversion process itself consumes additional electricity, and the stability of the recharge voltage and current is poor, easily leading to irregular charge-discharge cycles and further damaging the electrode structure. These problems are intertwined, preventing the lithium battery's discharge potential from being fully realized, making range a core obstacle restricting the improvement of equipment performance. Summary of the Invention

[0006] The present invention provides a lithium battery-powered long-lasting hand drill to solve at least one of the above-mentioned technical problems.

[0007] The technical solution adopted in this invention is as follows:

[0008] A long-lasting lithium-ion battery-powered hand drill includes a working condition identification module, a multi-mode power supply control module, a lithium battery management module, and a human-machine interface module. These modules are interconnected to form a closed-loop control link. The working condition identification module collects real-time working condition data, providing a basis for power supply mode switching. The multi-mode power supply control module, including a core controller and voltage / current regulation unit, is used to configure various power supply modes adapted to different working conditions. It can dynamically adjust the lithium battery output parameters based on working condition data or user commands, enabling automatic or manual switching of power supply modes. The lithium battery management module monitors the lithium battery's operating status, achieving cell balancing and charge / discharge protection. The human-machine interface module is used for mode selection, parameter setting, and equipment status viewing.

[0009] Furthermore, this application proposes that the working condition identification module, the multi-mode power supply control module, the lithium battery management module, and the human-machine interaction module are connected via a CAN bus to transmit working condition data, control commands, and equipment status signals, so as to ensure the real-time performance and anti-interference of data interaction and maintain the stable operation of the closed-loop control link.

[0010] Furthermore, this application also proposes that the power supply modes of the multi-mode power supply control module include a fixed operating condition power supply mode, a dynamic adaptation power supply mode, and a manual adjustment power supply mode; the fixed operating condition power supply mode adapts to typical operating conditions and presets corresponding output parameters; the dynamic adaptation power supply mode can dynamically adjust the output parameters according to changes in operating conditions; the manual adjustment power supply mode can output corresponding voltage and current according to user-set parameters, and automatically cut off when the set parameters exceed the rated range.

[0011] Furthermore, this application proposes that the working condition identification module includes a torque sensor, a speed sensor, a current sensor, and a data fusion unit; the torque sensor is integrated between the drill bit chuck and the drive spindle to collect load torque; the speed sensor is installed at the motor output shaft end to obtain the motor speed; the current sensor is connected in series in the lithium battery power supply circuit to detect the output current; and the data fusion unit is integrated in the core controller to perform weighted fusion of sensor data and determine the working condition type.

[0012] Furthermore, this application also proposes that the lithium battery management module includes a state monitoring unit, a cell balancing unit, and a protection unit; the state monitoring unit estimates the remaining capacity of the lithium battery and collects voltage and temperature signals; the cell balancing unit balances the voltage of each cell; and the protection unit has over-temperature, over-charge, over-discharge, and short-circuit protection functions.

[0013] Furthermore, this application also proposes a redundant power recovery module, which is linked to the multi-mode power supply control module and the lithium battery management module respectively. It selectively establishes power transmission with the motor output shaft and is activated when the multi-mode power supply control module has redundant output power. It converts the redundant power into storable air pressure energy for active heat dissipation of internal heat-generating components and post-drilling soot blowing operations.

[0014] Furthermore, this application also proposes that the redundant power recovery module includes a power transmission control unit, a power conversion unit, a pneumatic storage unit, and a pneumatic circuit control unit; the power transmission control unit is connected to the motor output shaft and the power conversion unit to control the transmission and disconnection of redundant power; the power conversion unit converts motor motion into pneumatic energy; the pneumatic storage unit is used to store pneumatic energy and has a built-in pressure sensor; the pneumatic circuit control unit controls the pneumatic energy release path to achieve active heat dissipation or soot blowing operations.

[0015] Furthermore, this application also proposes that the air circuit control unit includes an internal circulation heat dissipation channel, an external soot blowing channel, and a vent valve; the internal circulation heat dissipation channel runs through the heat dissipation area of ​​the lithium battery pack and the multi-mode power supply control module, and connects with the heat dissipation component housing guide groove to form a closed-loop heat dissipation air circuit; the external soot blowing channel extends to the side of the drill bit chuck, and the end is set to the nozzle; the vent valve is controlled by the core controller to realize the start and stop of the soot blowing operation.

[0016] Furthermore, this application proposes that the startup of the redundant power recovery module is determined by the core controller of the multi-mode power supply control module, and the determination condition is that the actual output power is significantly greater than the power required under operating conditions and the pressure of the air pressure storage unit is lower than a preset threshold. During startup, the core controller synchronously adjusts the output of the voltage and current regulation unit to compensate for the load resistance of the redundant power recovery module and ensure stable motor output.

[0017] Furthermore, this application also proposes that the soot blowing operation is controlled by user instructions from the human-machine interface module. After the user sends the soot blowing instruction, the core controller controls the vent valve to open, and the air pressure storage unit releases air pressure energy. When the pressure of the air pressure storage unit drops to a preset stop threshold, the core controller controls the vent valve to close, and the soot blowing operation is stopped.

[0018] Due to the adoption of the above technical solution, the beneficial effects achieved by this invention are as follows:

[0019] 1. Significantly improved battery life: By identifying operating conditions and dynamically adapting to multi-mode power supply, energy waste under light load conditions is avoided. At the same time, redundant power recovery and utilization further improve energy utilization and effectively extend the battery life of lithium batteries.

[0020] 2. Extended battery life: The cell balancing function of the lithium battery management module reduces the difference in cell degradation, and multiple protection mechanisms such as over-temperature and over-charge prevent battery damage, significantly improving battery life and safety.

[0021] 3. Optimized operating performance: The multi-mode power supply design adapts to different operating conditions, ensuring stable motor output. The active heat dissipation function of the redundant power recovery module ensures the stability of the equipment during long-term high-load operation, and the soot blowing function improves the cleanliness and efficiency of the operation.

[0022] 4. Convenient and flexible operation: The human-computer interaction module supports mode selection, parameter setting and status viewing. The manual and automatic power supply modes can be switched to meet the needs of different users. The automatic parameter capture mechanism reduces the risk of operation.

[0023] 5. Strong anti-interference capability: Each module communicates via CAN bus, ensuring real-time and reliable data transmission. The closed-loop control link ensures stable operation of the equipment in complex working environments. Attached Figure Description

[0024] Figure 1 This is a front view of the pistol drill proposed in this invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the pistol drill proposed in this invention;

[0026] Figure 3 This is a schematic diagram of the internal structure of the pistol drill proposed in this invention from the rear view.

[0027] Figure 4 This is an overall control logic block diagram of a specific embodiment of the present invention;

[0028] Figure 5 This is a control logic block diagram of the working condition identification module in a specific embodiment of the present invention;

[0029] Figure 6 This is a block diagram of the operation control logic of the lithium battery management module in a specific embodiment of the present invention;

[0030] Figure 7 This is a block diagram of the operation control logic of the redundant power recovery module in a specific embodiment of the present invention;

[0031] Figure 8 This is a block diagram of the operation control logic of the human-computer interaction module in a specific embodiment of the present invention;

[0032] Figure 9 This is a block diagram of the collaborative operation control logic of each module in a specific embodiment of the present invention.

[0033] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0034] In the attached diagram:

[0035] 1. Operating condition identification module; 2. Multi-mode power supply control module; 21. Core controller; 22. Voltage and current regulation unit; 3. Lithium battery management module; 4. Human-machine interaction module; 5. Redundant power recovery module; 51. Power transmission control unit; 52. Power conversion unit; 53. Air pressure storage unit. Detailed Implementation

[0036] To more clearly illustrate the overall concept of the present invention, a detailed description will be provided below with reference to the accompanying drawings and examples.

[0037] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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, an electrical connection, or a communication 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 invention according to the specific circumstances.

[0039] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," "specific example," or "specific example" 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 the invention. 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.

[0040] Reference Figures 1-9This application proposes a long-lasting lithium-ion battery-powered hand drill, comprising a working condition identification module 1, a multi-mode power supply control module 2, a lithium battery management module 3, and a human-machine interaction module 4. These modules are interconnected to form a closed-loop control link. The working condition identification module 1 collects real-time working condition data, providing a basis for determining power supply mode switching. The multi-mode power supply control module 2 includes a core controller 21 and a voltage and current adjustment unit 22, used to configure various power supply modes adapted to different working conditions. It can dynamically adjust the lithium battery output parameters according to working condition data or user commands, achieving automatic or manual switching of power supply modes. The lithium battery management module 3 monitors the lithium battery's operating status, achieving cell balancing and charge / discharge protection. The human-machine interaction module 4 is used for mode selection, parameter setting, and equipment status viewing.

[0041] The system comprises several modules: The working condition identification module 1 senses and acquires various operating parameters of the hand drill during actual operation, such as load size and speed requirements, and provides this data to other modules for decision-making. The multi-mode power supply control module 2 flexibly adjusts the output voltage and current of the lithium battery according to the working conditions of the hand drill or the user's operating instructions to match different operational needs and optimize energy utilization efficiency. This module typically includes a core controller 21 and a voltage and current regulation unit 22. The lithium battery management module 3 focuses on the health management of the lithium battery pack, including real-time monitoring of various battery parameters such as voltage, temperature, and current to ensure the battery operates within a safe range and performs energy balancing between cells to extend battery life and ensure safety. The human-machine interface module 4 provides an interface for users to exchange information with the hand drill system, allowing users to select modes, set parameters, and view the equipment's operating status and battery information.

[0042] The operating condition identification module 1 can be implemented in several ways. For example, a single current sensor can be used to monitor the motor's operating current; a significant change in the current value is considered a change in operating condition. Alternatively, a single speed sensor can be used to sense the motor speed; when the speed deviates from a preset range, the system deems the operating condition needing adjustment. These sensors directly transmit the collected raw data to the control module, which performs simple threshold checks to determine whether a power supply mode switch is necessary. Thus, the operating condition identification module 1 collects real-time operating condition data, providing a basis for determining power supply mode switching.

[0043] The multi-mode power supply control module 2 can be configured with several basic power supply modes. For example, a "low-power mode" can be set for light-load operation, a "medium-power mode" for regular operation, and a "high-power mode" for heavy-load operation. Switching between these modes can be achieved manually by the user on the human-machine interface module 4. For automatic switching, the core controller 21 can receive simple signals from the operating condition identification module 1, such as "light-load" or "heavy-load" indications, and then switch between preset fixed-power modes based on these indications. The voltage and current regulation unit 22 outputs fixed voltage and current parameters according to the selected mode. Thus, the multi-mode power supply control module 2, including the core controller 21 and the voltage and current regulation unit 22, is used to configure multiple power supply modes adapted to different operating conditions. It can dynamically adjust the lithium battery output parameters according to operating condition data or user commands to achieve automatic or manual switching of the power supply mode.

[0044] The lithium battery management module 3 can monitor the voltage of the entire battery pack using a total voltage sensor. When the total voltage falls below a certain fixed threshold, over-discharge protection is triggered; when the total voltage exceeds a certain fixed threshold, overcharge protection is triggered. For cell balancing, a passive balancing method can be used. When the voltage of a cell is too high, it is discharged through a resistor to reduce its voltage and bring it closer to the voltage of other cells. Temperature monitoring can be achieved using a temperature sensor installed on the outside of the battery pack. When the temperature exceeds a preset value, over-temperature protection is triggered. Thus, the lithium battery management module 3 monitors the operating status of the lithium battery, achieving cell balancing and charge / discharge protection.

[0045] The human-machine interface module 4 can be designed to include several physical buttons and a simple indicator light. Users can cycle through preset power supply modes using the buttons, for example, switching modes with a short press and confirming with a long press. For parameter settings, a limited number of preset power levels can be provided for user selection, such as "Level 1," "Level 2," etc., each corresponding to a fixed set of output parameters. Device status can be viewed using the color or flashing frequency of the indicator light; for example, green indicates normal operation, and red indicates a fault or low battery. Therefore, the human-machine interface module 4 is used for mode selection, parameter setting, and device status viewing.

[0046] The communication between modules can be achieved through point-to-point wired connections. For example, the operating condition identification module 1 sends data to the multi-mode power supply control module 2 via a separate signal line, and the multi-mode power supply control module 2 then sends control commands to the lithium battery management module 3 via another set of signal lines. The human-machine interface module 4 is connected to the core controller 21 via separate button signal lines and indicator light drive lines. This connection method forms a basic feedback loop, enabling the control module to receive status information and issue corresponding control commands. Thus, the communication connections between the modules form a closed-loop control link.

[0047] The following example will provide a more detailed explanation of the above technical solution:

[0048] Suppose user A is using a long-lasting lithium-ion battery hand drill to perform a task. First, user A needs to drill a hole in a piece of cork. Before starting the task, user A selects "low power mode" through the human-machine interface module 4 to accommodate the light load requirements of drilling cork.

[0049] When the hand drill begins drilling, the current sensor in the working condition identification module 1 starts collecting real-time motor operating current data. Since it's cork drilling, the motor load is relatively small, and the current value detected by the current sensor is at a low level. This current data is transmitted to the core controller 21 of the multi-mode power supply control module 2. Based on the received low current data and the "low power mode" pre-selected by user A, the core controller 21 maintains the lithium battery's output parameters at a low voltage and current level. Accordingly, the voltage and current regulation unit 22 outputs an appropriate amount of electrical energy from the lithium battery to supply the motor, ensuring that the motor drills at a suitable speed and torque, avoiding power waste caused by excessive power output from the lithium battery under light load conditions.

[0050] During drilling, the lithium battery management module 3 continuously monitors the operating status of the lithium battery. The status monitoring unit collects the total voltage and temperature signals of the battery pack in real time. The cell balancing unit performs passive balancing in the background. When it detects that the voltage of a certain cell is slightly higher than that of other cells, it performs a small discharge through a resistor to reduce the voltage difference between cells. The protection unit triggers over-discharge protection when the total battery voltage is too low or over-temperature protection when the temperature is too high, based on preset fixed thresholds, to ensure the safe operation of the battery.

[0051] After drilling the cork, User A needs to tighten several screws. At this point, User A manually switches the power supply mode to "medium power mode" via the human-machine interface module 4. Upon receiving the user's command, the core controller 21 of the multi-mode power supply control module 2 immediately adjusts the output parameters of the voltage and current regulation unit 22, enabling the lithium battery to output medium power. This allows the hand drill to complete the screw tightening operation with more suitable torque and speed.

[0052] Throughout the operation, the working condition identification module 1, multi-mode power supply control module 2, lithium battery management module 3, and human-machine interaction module 4 form a closed-loop control link via wired connections. The working condition identification module 1 continuously provides working condition data; the multi-mode power supply control module 2 adjusts the power supply based on this data and user commands; the lithium battery management module 3 provides feedback on battery health status and executes protective measures; and the human-machine interaction module 4 serves as the interface for user interaction with the system. This collaborative operation ensures that the hand drill receives a relatively suitable power supply under different operating scenarios, thereby alleviating to some extent the problems of lithium battery power waste and low discharge efficiency.

[0053] Based on the above examples, this embodiment provides a hand drill with long-lasting lithium battery life, and its overall technical concept demonstrates progress in optimizing lithium battery discharge and improving battery life.

[0054] Compared to the fixed power output or limited power adjustment modes commonly used in existing technologies, this embodiment introduces a working condition identification module 1 and a multi-mode power supply control module 2 to achieve automatic or manual switching of the power supply mode. In the example above, user A can select the "low power mode" according to the light load requirements of cork drilling, avoiding the power waste caused by the fixed high power output of traditional hand drills under light load conditions. When tightening screws is required, user A can manually switch to the "medium power mode" so that the power supply parameters can better match the work requirements. This ability to dynamically adjust the lithium battery output parameters according to the working conditions or user instructions effectively improves the discharge efficiency of the lithium battery and reduces ineffective energy consumption.

[0055] Furthermore, the lithium battery management module 3 in this embodiment monitors the operating status of the lithium battery and implements cell balancing and charge / discharge protection. In this example, the lithium battery management module 3 continuously monitors the battery voltage and temperature, and performs passive balancing and trigger protection when necessary. This helps maintain the health of the battery pack, extends battery life, and ensures safety during operation. Although its balancing and protection mechanisms are relatively basic, they provide basic battery management, avoiding capacity degradation and safety hazards caused by insufficient battery management.

[0056] The human-machine interface module 4 provides users with intuitive mode selection and status viewing functions, improving the operability of the equipment. Users can flexibly adjust the power supply mode according to actual work needs, thus enhancing the adaptability of the hand drill.

[0057] By establishing a closed-loop control link through the communication connections of the aforementioned modules, the handgun drill in this embodiment can perceive the working conditions, adjust power supply parameters, and monitor battery status, forming a preliminary intelligent management system. This systematic design enables the handgun drill to make more rational use of lithium battery energy in different working scenarios, thereby alleviating to some extent the problems of insufficient lithium battery life, low discharge efficiency, and damaged battery life in existing technologies.

[0058] Reference Figures 1-9 This application further proposes that the working condition identification module 1, the multi-mode power supply control module 2, the lithium battery management module 3 and the human-machine interaction module 4 are connected via a CAN bus to transmit working condition data, control commands and equipment status signals, so as to ensure the real-time performance and anti-interference of data interaction and maintain the stable operation of the closed-loop control link.

[0059] The CAN bus, as an information carrier, carries all the key information required for decision-making, execution, and feedback between the various functional modules within the hand drill. Operating condition data includes parameters such as torque, speed, and current collected by the operating condition identification module 1, which serves as the basis for the multi-mode power supply control module 2 to switch power supply modes and adjust parameters. Control commands include voltage and current adjustment commands issued by the multi-mode power supply control module 2, or mode selection commands issued by the human-machine interface module 4, which are crucial for driving the actuators. Equipment status information includes battery voltage, temperature, remaining charge, and charge / discharge protection status monitored by the lithium battery management module 3, providing important information for system health management and user understanding of equipment status. It is worth noting that different types of data can be transmitted by defining specific CAN message IDs and data frame formats. For example, a high-priority ID can be assigned to operating condition data to ensure its real-time performance. Furthermore, multiple related signals can be encapsulated in a single CAN frame for transmission using a data packing and unpacking mechanism to improve bus utilization.

[0060] The above technical solution connects the working condition identification module 1, multi-mode power supply control module 2, lithium battery management module 3, and human-machine interaction module 4 via a CAN bus, effectively solving the problems of insufficient real-time data transmission and poor anti-interference capability that traditional communication methods may face in complex working environments. The high reliability, real-time performance, and powerful error detection and arbitration mechanism of the CAN bus ensure accurate and timely transmission of working condition data, control commands, and equipment status signals, greatly improving the stability and response speed of the closed-loop control link. This allows the hand drill to adjust its power supply strategy more precisely according to real-time working conditions. For example, when encountering hard materials during drilling, the multi-mode power supply control module 2 can quickly receive torque and current data and adjust the output power in a timely manner to avoid motor overload or drill jamming. Simultaneously, the lithium battery management module 3 can also provide real-time feedback on battery status to ensure power supply safety. Therefore, this solution significantly improves the adaptability, reliability, and safety of the hand drill under various working conditions, extends the equipment's service life, and optimizes the user experience.

[0061] Reference Figures 1-9 This application further proposes that the power supply modes of the above-mentioned multi-mode power supply control module 2 include a fixed operating condition power supply mode, a dynamic adaptation power supply mode, and a manual adjustment power supply mode; the fixed operating condition power supply mode adapts to typical operating conditions and presets corresponding output parameters; the dynamic adaptation power supply mode can dynamically adjust the output parameters according to changes in operating conditions; the manual adjustment power supply mode can output corresponding voltage and current according to user-set parameters, and automatically cut off when the set parameters exceed the rated range.

[0062] When a user uses a hand drill for wood drilling, the working condition identification module 1 detects typical wood drilling conditions. The core controller 21 then activates the fixed working condition power supply mode and retrieves optimized voltage (e.g., 18V) and current (e.g., 5A) parameters for wood drilling from a preset parameter table. The voltage and current regulation unit 22 then outputs stable parameters to ensure efficient and stable drilling. Subsequently, the user switches to concrete drilling. Due to the uneven hardness of concrete, the load torque and speed fluctuate frequently. The core controller 21 automatically switches to the dynamic adaptive power supply mode, monitoring the data from the torque sensor, speed sensor, and current sensor in real time. When the drill bit encounters a hard point, the torque and current increase instantaneously. The core controller 21 immediately instructs the voltage and current regulation unit 22 to increase the output voltage and current to maintain stable speed; when the load decreases, the output is reduced accordingly to avoid energy waste. After drilling, the user may need to use a hand drill for fine screw tightening, requiring lower and more stable torque. The user selects the manual power supply adjustment mode through the human-machine interface module 4 and inputs the desired lower voltage (e.g., 12V) and current (e.g., 2A). After receiving the command, the core controller 21 drives the voltage and current regulation unit 22 to output these parameters. If the user accidentally inputs an excessively high voltage, such as 25V, the core controller 21 will immediately cut it off to the maximum rated voltage of the lithium battery, such as 21V, and alert the user, thereby protecting the device.

[0063] Through the above technical solutions, the handgun drill of this application can provide a more precise and efficient power supply strategy according to different operational needs and changes in working conditions. The fixed working condition power supply mode provides optimized parameters for typical working scenarios, improving operational efficiency and stability; the dynamic adaptive power supply mode can respond to complex and ever-changing load demands in real time, maximizing energy utilization and extending battery life; the manual adjustment power supply mode gives users greater flexibility to meet personalized operational needs, while ensuring equipment operation safety through a parameter interception mechanism. This multi-mode power supply strategy significantly improves the handgun drill's operational adaptability, energy efficiency ratio, and user experience, effectively solving the problems of high energy consumption, poor adaptability, and insufficient safety under a single power supply mode.

[0064] As a specific implementation of the working condition identification module 1 in this application, refer to Figures 1-9 This application further proposes a working condition identification module 1, which includes a torque sensor, a speed sensor, a current sensor, and a data fusion unit. The torque sensor is integrated between the drill chuck and the drive spindle to collect the load torque. The speed sensor is installed at the motor output shaft end to obtain the motor speed. The current sensor is connected in series in the lithium battery power supply circuit to detect the output current. The data fusion unit is integrated in the core controller 21 to perform weighted fusion of sensor data and determine the working condition type.

[0065] The working condition identification module 1 integrates torque, speed, and current sensors to achieve comprehensive perception of key physical parameters during operation. Specifically, the torque sensor monitors the load torque between the drill chuck and the drive spindle in real time, directly reflecting the resistance of drilling or tightening; the speed sensor accurately acquires the rotational speed of the motor output shaft, indicating the tool's operating speed; and the current sensor, connected in series in the lithium battery power supply circuit, detects the real-time output current of the battery, thus reflecting the actual power consumption of the motor. The raw data collected by these sensors is transmitted to the data fusion unit integrated within the core controller 21. The data fusion unit performs weighted fusion processing on this multi-source heterogeneous data, and by comprehensively analyzing the correlation between torque, speed, and current, it can more accurately identify the specific working conditions such as the load type, material hardness, and drilling depth of the current operation. For example, high torque, low speed, and high current may indicate heavy-load drilling, while low torque, high speed, and medium current may indicate light-load drilling or no-load operation. This multi-sensor data fusion method significantly improves the accuracy and robustness of working condition identification, avoiding misjudgments that may arise from single-sensor data. By accurately determining the working condition type, the working condition identification module 1 can provide a reliable basis for the multi-mode power supply control module 2, enabling the multi-mode power supply control module 2 to dynamically and intelligently switch to the most suitable power supply mode according to the actual operation requirements, thereby optimizing the energy output of the lithium battery, extending the battery life, and improving the overall operating performance of the hand drill.

[0066] Through the above technical solution, the working condition identification module 1 can collect operation data in real time from multiple dimensions using torque sensors, speed sensors, and current sensors. This data is then intelligently processed by the data fusion unit to achieve accurate identification of the operating conditions. This refined working condition perception capability significantly improves the accuracy and timeliness of power supply mode switching, avoiding energy waste or performance deficiencies caused by inaccurate working condition judgment. The hand drill can intelligently adjust its output parameters according to the actual operating load, ensuring optimal efficiency under different operating intensities, effectively extending the lithium battery's runtime, and improving the hand drill's adaptability and operation quality across various working scenarios.

[0067] As one specific implementation of the lithium battery management module 3, refer to Figures 1-9 This application further proposes a lithium battery management module 3 including a state monitoring unit, a cell balancing unit, and a protection unit; the state monitoring unit estimates the remaining capacity of the lithium battery and collects voltage and temperature signals; the cell balancing unit balances the voltage of each cell; and the protection unit has over-temperature, over-charge, over-discharge, and short-circuit protection functions.

[0068] The state monitoring unit (SMU) is a component used to acquire key operating parameters of the lithium battery in real time and assess the battery's energy state. This unit may include hardware such as voltage sampling circuits, current sampling circuits, and temperature sensors, and, in conjunction with firmware running on a microcontroller, uses algorithms such as coulomb counting, open-circuit voltage methods, or Kalman filtering to accurately estimate the remaining capacity of the lithium battery. The cell balancing unit aims to address the issue of voltage inconsistencies between individual cells in a lithium battery pack, ensuring the overall performance and lifespan of the battery pack. This unit can employ a passive balancing method, using resistors to dissipate the energy of high-voltage cells as heat, reducing their voltage to a level close to that of other cells. The protection unit aims to prevent damage or safety accidents to the lithium battery under abnormal operating conditions. This unit can integrate over-temperature protection circuits, such as an NTC thermistor with a comparator, overcharge protection circuits detecting the upper limit of individual cell voltage, over-discharge protection circuits detecting the lower limit of individual cell voltage, and short-circuit protection circuits detecting abnormal increases in loop current. Protection functions are achieved by cutting off the charging and discharging paths, such as through a control switch.

[0069] The solution in this application refines the lithium battery management module 3 into a state monitoring unit, a cell balancing unit, and a protection unit, achieving comprehensive and refined management of the lithium battery's operating state. Specifically, the state monitoring unit continuously estimates the remaining capacity of the lithium battery and collects the voltage and temperature signals of the battery pack in real time. This data forms the basis of lithium battery management, providing accurate input for subsequent cell balancing and protection functions. Based on the voltage data provided by the state monitoring unit, the cell balancing unit can identify the voltage differences between the cells in the battery pack and actively or passively adjust the energy to balance the voltage of each cell, thereby avoiding capacity reduction and shortened lifespan of the battery pack due to overcharging or over-discharging of some cells. Simultaneously, the protection unit uses the voltage, temperature, and current information collected by the state monitoring unit to determine in real time whether the battery is in an abnormal state such as over-temperature, overcharge, over-discharge, or short circuit. Once an abnormality is detected, the protection unit immediately activates the corresponding protection mechanism, such as cutting off the charging and discharging circuit, to prevent battery damage or safety accidents. Through the collaborative work of these three units, the lithium battery management module 3 can form a complete battery health management system, ensuring that the lithium battery can operate safely, efficiently, and for a long life under various operating conditions. This effectively solves the problems of insufficient management accuracy and safety hazards that may result from relying solely on the general approach of "monitoring working status, achieving cell balancing, and charge / discharge protection".

[0070] Through the above technical solutions, the lithium battery management module 3 is refined into a state monitoring unit, a cell balancing unit, and a protection unit, making refined management of the lithium battery possible. The state monitoring unit can accurately estimate the remaining power and collect key signals, providing real-time and reliable data support for the battery's health status. The cell balancing unit effectively solves the problem of inconsistent voltage among individual cells within the battery pack, avoiding capacity decay and shortened lifespan caused by the "weakest link effect," thereby extending the overall lifespan of the lithium battery. The protection unit provides comprehensive safety protection, effectively preventing potential dangers such as overheating, overcharging, over-discharging, and short circuits, significantly improving the safety and reliability of the hand drill during use.

[0071] Reference Figures 1-9 This application further proposes that it also includes a redundant power recovery module 5, which is linked with the multi-mode power supply control module 2 and the lithium battery management module 3 respectively. It selectively establishes power transmission with the motor output shaft and is activated when the multi-mode power supply control module 2 has redundant output power. It converts the redundant power into storable air pressure energy for active heat dissipation of the internal heat-generating components of the equipment and soot blowing operation after drilling.

[0072] The redundant power recovery module 5 is activated when there is redundant output power in the multi-mode power supply control module 2. Specifically, it starts working only when the power output of the main power supply system exceeds the actual power required for the current operating condition. The core controller 21 of the multi-mode power supply control module 2 determines whether redundant power exists by comparing the actual output power with the required power for the operating condition, or by monitoring the motor load rate or current consumption. Redundant power is determined to exist when the load rate is below a certain threshold. After activation, the redundant power recovery module 5 converts the redundant power into storable pneumatic energy. Through a piston-cylinder mechanism, mechanical energy is directly converted into pneumatic energy. The stored pneumatic energy is used for active heat dissipation of internal heat-generating components and post-drilling dust removal. Heat dissipation is achieved by guiding compressed air through pipes to the vicinity of heat-generating components such as the lithium battery pack and the multi-mode power supply control module 2, where forced convection removes heat. Dust removal is achieved by spraying compressed air through nozzles onto the drilling area to remove dust and debris generated during drilling.

[0073] The solution proposed in this application introduces a redundant power recovery module 5 into the hand drill. During operation, when the multi-mode power supply control module 2 detects redundant power output from the motor, the redundant power recovery module 5 selectively establishes power transmission with the motor output shaft, efficiently converting potentially wasted mechanical energy into storable pneumatic energy. This generated pneumatic energy is then used for two key auxiliary functions: first, to provide active cooling for the internal heat-generating components, effectively controlling the temperature rise of the equipment by forcibly removing heat through airflow, thereby ensuring the performance and lifespan of the lithium battery and maintaining the stable operation of the control module; second, to provide a dust-blowing function for post-drilling operations, rapidly removing dust and debris from the drilling area by releasing pneumatic energy to create a high-speed airflow, improving work efficiency and cleanliness.

[0074] In actual operation of a hand drill, when the user is performing light-load drilling or running it unloaded, such as adjusting the drill bit position, the core controller 21 of the multi-mode power supply control module 2 will detect that the motor output power is significantly higher than the actual demand of the current working condition. At this time, the core controller 21 will send a start command to the redundant power recovery module 5. After receiving the command, an electromagnetic clutch inside the redundant power recovery module 5 will engage, transmitting the rotational power of the motor output shaft to a miniature air pump. The miniature air pump will start working, compressing ambient air and storing it in a small high-pressure air tank. The pressure sensor built into the air tank monitors the air pressure in real time. When the air pressure reaches the preset upper limit, the core controller 21 will control the electromagnetic clutch to disengage, stopping the air pump. When the lithium battery management module 3 detects that the lithium battery pack temperature rises above the preset threshold, or when the user issues a blow-off command through the human-machine interaction module 4, the core controller 21 will control the corresponding solenoid valve in the air circuit connected to the air tank to open. If the need is for heat dissipation, compressed air will be guided to the heat dissipation area of ​​the lithium battery pack and the multi-mode power supply control module 2 through the internal circulation heat dissipation channel to form convection and remove heat; if the need is for dust removal, compressed air will be sprayed out from the nozzle on the side of the drill bit chuck through the external dust removal channel to remove dust from the working area.

[0075] Through the above technical solution, this application effectively solves the problem of redundant power waste that may exist during the operation of a hand drill, converting this energy into useful pneumatic energy. This not only significantly improves the energy utilization efficiency of the equipment, but also achieves active heat dissipation of the internal heat-generating components by utilizing the recovered energy, effectively controlling the temperature of the lithium battery and control module, thereby extending the service life and stability of the equipment. Simultaneously, the provided post-drilling soot blowing function greatly improves the cleanliness and efficiency of the operation, enhancing the user experience. This integrated energy recovery and utilization mechanism allows the hand drill to maintain long-lasting operation while possessing stronger environmental adaptability and operational convenience, eliminating the need for additional independent power supplies or drive mechanisms, thus optimizing the overall design and performance of the equipment.

[0076] As a specific embodiment of the redundant power recovery module 5, refer to Figures 1-9 This application further proposes a redundant power recovery module 5, including a power transmission control unit 51, a power conversion unit 52, a pneumatic storage unit 53, and a pneumatic circuit control unit. The power transmission control unit 51 is connected to the motor output shaft and the power conversion unit 52, and is used to control the transmission and disconnection of redundant power. The power conversion unit 52 converts motor motion into pneumatic energy. The pneumatic storage unit 53 stores pneumatic energy and has a built-in pressure sensor. The pneumatic circuit control unit controls the release path of the pneumatic energy to achieve active cooling or soot blowing operations.

[0077] Specifically, the power transmission control unit 51 employs an electromagnetic clutch or a mechanical clutch, controlling the opening and closing of power transmission via electrical signals or mechanical linkage. The power conversion unit 52 is a device for converting the mechanical kinetic energy obtained from the motor output shaft into pneumatic energy. This unit can employ a piston-type air pump, compressing air through the reciprocating motion of the piston. The pneumatic storage unit 53 is a container for storing the pneumatic energy generated by the power conversion unit 52, with a built-in pressure sensor for real-time monitoring of the stored pneumatic pressure. The pneumatic storage unit 53 can be a small, high-strength, well-sealed air tank, such as a gas cylinder made of metal or composite materials. Alternatively, the pneumatic storage unit 53 can be a flexible airbag or a closed cavity integrated into the internal structure of a pistol drill, with materials possessing good pressure resistance and sealing properties. The built-in pressure sensor monitors the pneumatic pressure within the pneumatic storage unit 53 accurately and in real-time. The air path control unit manages the release path of the pneumatic energy stored in the pneumatic storage unit 53 to achieve active cooling or soot blowing operations. The pneumatic control unit can consist of multiple solenoid valves, pneumatic valves, or mechanical valves, which selectively open or close different pneumatic passages through commands issued by the core controller 21.

[0078] When the multi-mode power supply control module 2 detects redundant output power from the motor, the core controller 21 instructs the power transmission control unit 51 to establish a mechanical connection between the motor output shaft and the power conversion unit 52. At this time, the power conversion unit 52 begins converting the mechanical energy of the motor output shaft into pneumatic energy and transmits the generated pneumatic energy to the pneumatic storage unit 53 for storage. The pressure sensor built into the pneumatic storage unit 53 monitors the internal pneumatic pressure in real time and feeds the data back to the core controller 21 for subsequent control decisions. When active cooling or soot blowing is required, the core controller 21, based on preset conditions or user instructions, controls the pneumatic circuit control unit to selectively open the corresponding pneumatic energy release path. For example, if cooling is required, the airflow is directed to the heat dissipation area of ​​the internal heat-generating components; if soot blowing is required, the airflow is directed to the side of the drill chuck. This mechanism ensures that redundant mechanical energy can be effectively captured and stored, and precisely converted into pneumatic energy according to actual needs to perform specific auxiliary functions, thereby improving the overall energy utilization efficiency and functional versatility of the pistol drill. By linking with the multi-mode power supply control module 2, the redundant power recovery process is only activated when there is redundant power, avoiding additional burden on the motor during critical operations and ensuring the stable operation of the hand drill.

[0079] The following is a concrete example. The power transmission control unit 51 in the redundant power recovery module 5 can be a small electromagnetic clutch. When the core controller 21 issues a command, the electromagnetic coil is energized to generate magnetic force, engaging the clutch plates and transmitting the rotational power of the motor output shaft to the power conversion unit 52. The power conversion unit 52 can be a miniature piston-type air pump, with its piston rod connected to the power transmission control unit 51 via a linkage mechanism. When the power transmission control unit 51 is engaged, the piston reciprocates within the cylinder, compressing air and sending it into the air pressure storage unit 53. The air pressure storage unit 53 can be a cylindrical high-pressure air tank with a volume of approximately 50 ml, made of lightweight aluminum alloy, integrating a MEMS pressure sensor that communicates with the core controller 21 via an I2C interface to report the tank pressure in real time. The air path control unit can consist of two small two-position three-way solenoid valves. One valve controls the airflow into the internal circulation cooling channel, and the other controls the airflow into the external soot blowing channel. When cooling is needed, the core controller 21 activates the first solenoid valve; when soot blowing is needed, the second solenoid valve is activated.

[0080] Through the above technical solutions, the internal structure and working mechanism of the redundant power recovery module 5 are clearly defined, making the recovery and utilization of redundant power more efficient and reliable. The power transmission control unit 51 ensures precise engagement and disengagement of power transmission, avoiding unnecessary energy loss. The power conversion unit 52 achieves the effective conversion of mechanical energy into pneumatic energy. The pneumatic storage unit 53 and its built-in pressure sensor enable the storage and monitoring of pneumatic energy, providing a basis for subsequent precise control. The pneumatic circuit control unit can flexibly use the stored pneumatic energy for active cooling or soot blowing operations according to actual needs, greatly improving the functionality and practicality of the hand drill. This effectively solves the technical problem of how to efficiently and accurately manage power transmission, energy conversion, pneumatic storage, and pneumatic energy release paths in the specific functional implementation of the redundant power recovery module 5, thereby improving the overall performance of the equipment and the user experience.

[0081] As a preferred embodiment of the gas path control unit, refer to Figures 1-9 This application further proposes that the air circuit control unit includes an internal circulation heat dissipation channel, an external soot blowing channel and a vent valve; the internal circulation heat dissipation channel runs through the heat dissipation area of ​​the lithium battery pack and the multi-mode power supply control module 2, and connects with the heat dissipation component housing guide groove to form a closed-loop heat dissipation air circuit; the external soot blowing channel extends to the side of the drill bit chuck, and the end is set to the nozzle; the vent valve is controlled by the core controller 21 to realize the start and stop of the soot blowing operation.

[0082] The air circuit control unit clearly defines the internal circulation heat dissipation channel and the external soot blowing channel, and introduces a vent valve controlled by the core controller 21, enabling precise distribution of stored air pressure energy according to actual needs. The closed-loop design of the internal circulation heat dissipation channel ensures continuous and efficient active cooling of key heat-generating components such as the lithium battery pack and the multi-mode power supply control module 2, effectively preventing overheating, extending component life, and ensuring the performance stability of the hand drill under long-term high-load operation. Simultaneously, the external soot blowing channel and its end-point directional nozzle, combined with the precise control of the vent valve, make post-drilling soot blowing operations efficient and convenient, quickly removing debris from the work area and improving work efficiency and the cleanliness of the working environment. This refined air circuit management not only solves the problems of uneven air pressure energy distribution and low utilization efficiency, but also significantly improves the overall reliability, durability, and user experience of the hand drill.

[0083] Furthermore, referring to Figures 1-9This application proposes that the startup of the redundant power recovery module 5 is determined by the core controller 21 of the multi-mode power supply control module 2. The determination condition is that the actual output power is significantly greater than the power required for the working condition and the pressure of the air pressure storage unit 53 is lower than the preset threshold. During startup, the core controller 21 synchronously adjusts the output of the voltage and current adjustment unit 22 to compensate for the load resistance of the redundant power recovery module 5 and ensure stable motor output.

[0084] The solution in this application achieves precise recovery of redundant power through the intelligent activation determination of the redundant power recovery module 5 by the core controller 21. The core controller 21 continuously monitors the actual operating status of the pistol drill, including the actual output power of the motor and the pressure of the air pressure storage unit 53. When the core controller 21 detects that the actual output power of the motor is significantly higher than the power required for the current working condition, indicating the existence of recoverable redundant energy, and simultaneously determines that the pressure of the air pressure storage unit 53 is lower than a preset threshold, indicating that the air pressure energy reserve is insufficient and needs to be replenished, the core controller 21 will issue a command to activate the redundant power recovery module 5. At the moment of activation of the redundant power recovery module 5, since it draws power from the motor, it is equivalent to adding an extra load to the motor. To avoid affecting the motor performance, the core controller 21 will synchronously adjust the voltage and current adjustment unit 22 in the multi-mode power supply control module 2 to precisely increase the power supply to the motor, thereby compensating for the load resistance brought by the redundant power recovery module 5. This synchronous adjustment mechanism ensures that the output parameters of the motor, such as speed and torque, remain stable before and after the activation of the redundant power recovery module 5, and the operating performance of the pistol drill will not fluctuate or decline. In this way, the hand drill can efficiently convert redundant power into pneumatic energy for storage without affecting its main operating function, so that it can be used for subsequent active cooling or soot blowing operations.

[0085] Through the above technical solution, the handgun drill can achieve intelligent and efficient recovery of redundant power, avoiding unnecessary energy waste. The core controller 21, based on a comparison of the actual output power and the required power under operating conditions, as well as the pressure status of the air pressure storage unit 53, accurately determines the activation timing of the redundant power recovery module 5, ensuring the effectiveness and timeliness of energy recovery. Simultaneously, when the redundant power recovery module 5 is activated, the core controller 21 synchronously adjusts the output of the voltage and current regulation unit 22, effectively compensating for the impact of the added load on motor performance. This ensures that the motor output remains stable during the recovery of redundant power, without speed fluctuations or power reduction, greatly improving the operational stability of the equipment and the user experience. This not only extends the battery life of the lithium battery but also provides a reliable air pressure energy source for active heat dissipation of internal heating components and post-drilling soot blowing operations, improving the overall performance and service life of the handgun drill.

[0086] Preferred, refer to Figures 1-9This application further proposes that the soot blowing operation is controlled by user instructions from the human-machine interaction module 4. After the user sends the soot blowing instruction, the core controller 21 controls the vent valve to open and the air pressure storage unit 53 to release air pressure energy. When the pressure of the air pressure storage unit 53 drops to the preset stop threshold, the core controller 21 controls the vent valve to close and stop the soot blowing operation.

[0087] After completing a drilling operation, the user needs to remove debris from the drilled area. The user can activate the descaling function using a dedicated button on the HMI module 4 of the handgun drill. When the user presses the button, the HMI module 4 generates a descaling command and sends it to the core controller 21. Upon receiving the command, the core controller 21 immediately sends an electrical signal to the vent valve, causing it to open. At this time, the compressed air pre-stored in the air pressure storage unit 53 is ejected through the external descaling channel via a directional nozzle on the side of the drill bit chuck, forming a strong airflow that blows away the debris from the drilled area. During the descaling process, the pressure sensor inside the air pressure storage unit 53 monitors the air pressure value in real time and transmits the data to the core controller 21. For example, if the preset stop threshold is 0.5 MPa, when the core controller 21 detects that the pressure in the air pressure storage unit 53 has dropped to 0.5 MPa or below, it immediately sends a command to close the vent valve. After the vent valve closes, the release of compressed air stops, and the descaling operation ends. This method ensures that soot blowing operations are started when needed and automatically stopped when air pressure resources are insufficient to complete the operation efficiently, thereby optimizing energy usage efficiency.

[0088] Through the above technical solution, the initiation of soot blowing is controlled by user commands, allowing users to flexibly choose when to perform soot blowing according to actual operational needs, thus improving the convenience and targeted nature of operation. Simultaneously, by monitoring the pressure of the air pressure storage unit 53 and setting a preset stop threshold, the soot blowing operation is automatically terminated, avoiding excessive consumption of air pressure energy and ensuring that a certain residual pressure is always maintained within the air pressure storage unit 53. This is beneficial for the continuous and efficient operation of the redundant power recovery module 5 and provides a basis for rapid response to subsequent heat dissipation or re-soot blowing operations, thereby improving the overall energy efficiency management of the equipment and the user experience.

[0089] For any parts not mentioned in this invention, existing technologies can be used or referenced.

[0090] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0091] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A long-lasting lithium battery-powered pistol drill, characterized in that, It includes a working condition identification module (1), a multi-mode power supply control module (2), a lithium battery management module (3), and a human-machine interaction module (4). The modules are connected to form a closed-loop control link. The working condition identification module (1) collects real-time working condition data to provide a basis for power supply mode switching; The multi-mode power supply control module (2) includes a core controller (21) and a voltage and current adjustment unit (22), which is used to configure a variety of power supply modes to adapt to different working conditions. It can dynamically adjust the lithium battery output parameters according to working condition data or user instructions to realize automatic or manual switching of power supply modes. The lithium battery management module (3) monitors the working status of the lithium battery and realizes cell balancing and charge / discharge protection; the human-machine interaction module (4) is used for mode selection, parameter setting and equipment status viewing; It also includes a redundant power recovery module (5), which is linked with the multi-mode power supply control module (2) and the lithium battery management module (3) respectively. It selectively establishes power transmission with the motor output shaft and starts when there is redundant output power in the multi-mode power supply control module (2). It converts the redundant power into storable air pressure energy to realize active heat dissipation of the internal heat-generating components of the equipment and soot blowing operation after drilling.

2. The long-lasting lithium battery pistol drill according to claim 1, characterized in that, The working condition identification module (1), multi-mode power supply control module (2), lithium battery management module (3) and human-machine interaction module (4) are connected via CAN bus to transmit working condition data, control commands and equipment status signals, so as to ensure the real-time performance and anti-interference of data interaction and maintain the stable operation of the closed-loop control link.

3. A long-lasting lithium battery-powered pistol drill according to claim 1, characterized in that, The power supply modes of the multi-mode power supply control module (2) include fixed working condition power supply mode, dynamic adaptation power supply mode and manual adjustment power supply mode; the fixed working condition power supply mode adapts to typical working conditions and presets corresponding output parameters; The dynamic adaptive power supply mode can dynamically adjust the output parameters according to changes in operating conditions; The manual power supply mode can output corresponding voltage and current according to the user-set parameters, and automatically cut off when the set parameters exceed the rated range.

4. A long-lasting lithium battery-powered pistol drill according to claim 1, characterized in that, The working condition identification module (1) includes a torque sensor, a speed sensor, a current sensor and a data fusion unit; the torque sensor is integrated between the drill bit chuck and the drive spindle to collect the load torque; the speed sensor is installed at the motor output shaft end to obtain the motor speed; the current sensor is connected in series in the lithium battery power supply circuit to detect the output current; the data fusion unit is integrated in the core controller (21) to perform weighted fusion of sensor data and determine the working condition type.

5. A long-lasting lithium battery-powered pistol drill according to claim 1, characterized in that, The lithium battery management module (3) includes a status monitoring unit, a cell balancing unit, and a protection unit; the status monitoring unit estimates the remaining power of the lithium battery and collects voltage and temperature signals; the cell balancing unit balances the voltage of each cell; and the protection unit has over-temperature, over-charge, over-discharge, and short-circuit protection functions.

6. A long-lasting lithium battery-powered pistol drill according to claim 1, characterized in that, The redundant power recovery module (5) includes a power transmission control unit (51), a power conversion unit (52), a pneumatic storage unit (53), and a pneumatic circuit control unit; the power transmission control unit (51) is connected to the motor output shaft and the power conversion unit (52) to control the transmission and disconnection of redundant power; the power conversion unit (52) converts the motor motion into pneumatic energy; the pneumatic storage unit (53) is used to store pneumatic energy and has a built-in pressure sensor; the pneumatic circuit control unit controls the pneumatic energy release path to achieve active heat dissipation or soot blowing operation.

7. A long-lasting lithium battery-powered pistol drill according to claim 6, characterized in that, The air circuit control unit includes an internal circulation heat dissipation channel, an external soot blowing channel and a vent valve; the internal circulation heat dissipation channel runs through the heat dissipation area of ​​the lithium battery pack and the multi-mode power supply control module (2), and connects with the heat dissipation component housing guide groove to form a closed-loop heat dissipation air circuit; the external soot blowing channel extends to the side of the drill bit chuck, and the end is set to the nozzle; the vent valve is controlled by the core controller (21) to realize the start and stop of the soot blowing operation.

8. A long-lasting lithium battery-powered pistol drill according to claim 1, characterized in that, The startup of the redundant power recovery module (5) is determined by the core controller (21) of the multi-mode power supply control module (2). The determination condition is that the actual output power is significantly greater than the working condition demand power and the pressure of the air pressure storage unit (53) is lower than the preset threshold. When starting, the core controller (21) synchronously adjusts the output of the voltage and current adjustment unit (22) to compensate for the load resistance of the redundant power recovery module (5) and ensure stable motor output.

9. A long-lasting lithium battery-powered pistol drill according to claim 7, characterized in that, The soot blowing operation is controlled by user instructions from the human-machine interaction module (4). After the user sends the soot blowing instruction, the core controller (21) controls the vent valve to open and the air pressure storage unit (53) to release air pressure energy. When the pressure of the air pressure storage unit (53) drops to the preset stop threshold, the core controller (21) controls the vent valve to close and stop the soot blowing operation.

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