Power bank with simple NTC layout mode and temperature detection system

Abstract

The invention belongs to the technical field of temperature detection systems, and particularly relates to a power bank with a simple NTC layout mode and a temperature detection system, the power bank comprises the following components and implementation steps: a power bank main body structure: a power bank shell which is made of high-strength and flame-retardant engineering plastics, provides physical protection for internal components, is cuboid-shaped, and is provided with a temperature sensor; the size is designed according to the actual capacity requirement, and an upper cover and a lower cover are arranged and are fixedly connected through a buckle or a screw to form a closed internal space; according to the invention, a simple NTC layout module is adopted, NTC thermistors are arranged at multiple key positions of the battery pack, temperature information of multiple positions is synthesized, the average temperature is calculated by using a weighted average algorithm, and temperature change rates of different positions are considered, so that the error between a temperature detection result and the actual overall temperature of the battery pack is reduced; quick response can be realized during local overheating, safety accidents can be effectively prevented, and safe use of the power bank can be guaranteed.

Description

Technical Field

[0001] This invention relates to the field of temperature detection system technology, and in particular to a power bank and temperature detection system with a simple NTC layout. Background Technology

[0002] With the widespread use of mobile electronic devices, the market demand for power banks, as important portable power sources, continues to rise. Consumers not only demand large capacity and fast charging and discharging capabilities from power banks, but also have higher expectations for their safety and intelligence. Against this backdrop, power banks with temperature detection functions have emerged, aiming to monitor battery pack temperature in real time, prevent safety accidents caused by overheating or overcooling, ensure safe use, optimize charging and discharging performance, and extend battery life.

[0003] Limitations of Single-Point Detection: Currently, most power banks use a single-point layout for temperature detection, placing a temperature sensor only at a specific location within the battery pack. However, during use, the temperature of different parts of the battery pack may vary, and single-point detection cannot accurately reflect the overall temperature status of the battery pack. For example, during charging or discharging, the top of the battery pack may be hotter due to poor heat dissipation, while the bottom may be relatively cooler. Single-point detection struggles to capture this temperature distribution difference, leading to inaccurate temperature readings and failing to provide reliable data for safety protection and performance optimization.

[0004] Failure to consider the rate of temperature change: Current technologies for monitoring battery pack temperature often only focus on the absolute value of the temperature, ignoring the rate of temperature change. In reality, a rapid rise in localized temperature may be an early signal of abnormalities in the battery pack, such as internal short circuits or overcharging, which can cause a sharp increase in localized temperature. If such rapid temperature changes are not detected in time and appropriate measures are not taken, it can easily lead to safety accidents, such as battery fires or explosions, seriously threatening the personal and property safety of users.

[0005] Inadequate heat dissipation design: Some power banks have a rudimentary heat dissipation design, relying solely on natural heat dissipation from the casing, lacking effective heat dissipation structures and measures. Under high-temperature environments or prolonged high-load use, the heat generated by the battery pack cannot be dissipated in time, causing the temperature to rise continuously. This not only affects battery performance and lifespan but may also pose safety hazards. For example, some power banks, after continuous use in high-temperature environments for a period of time, develop excessively high casing temperatures, even becoming scalding to the touch, severely impacting user experience and safety.

[0006] Lack of Temperature Compensation Mechanism: Existing power banks do not adequately consider the impact of temperature on battery performance when operating in low or high temperature environments, lacking corresponding temperature compensation mechanisms. In low-temperature environments, the battery's internal resistance increases, and charging / discharging efficiency decreases. If operation is continued according to the charging / discharging parameters at room temperature, it will lead to prolonged charging time, reduced discharge capacity, and may even damage the battery. In high-temperature environments, the battery's charging / discharging performance is also affected, and overheating accelerates battery aging and reduces battery lifespan. However, current technology has not effectively solved these problems. Summary of the Invention

[0007] To address the aforementioned problems, this invention proposes a power bank and temperature detection system with a simplified NTC layout, which more accurately solves the problems mentioned in the background section.

[0008] This invention is achieved through the following technical solution: This invention proposes a power bank and temperature detection system with a simplified NTC layout, comprising the following components and implementation steps: Power bank main structure: The power bank shell is made of high-strength, flame-retardant engineering plastic, providing physical protection for the internal components. Its shape is cuboid, and its dimensions are designed according to actual capacity requirements. It has an upper and lower cover, which are fixed together by clips or screws to form a closed internal space; The battery pack, composed of multiple lithium-ion battery cells connected in series or parallel, is placed inside the power bank shell and fixed by a battery mounting bracket to ensure that the battery pack does not shake during power bank use; The simplified NTC layout module uses a surface-mount NTC thermistor with a package size of 0402 or 0603, featuring small size and fast thermal response (time required to reach 90% resistance change) of less than 1 second; The NTC thermistor is attached to the battery pack using conductive adhesive. The surface, specifically located near the positive and negative terminals of the battery pack, no more than 3mm away from the terminals, ensures accurate sensing of temperature changes in critical parts of the battery pack. Simultaneously, a layer of thermally conductive silicone grease is applied to the area where the NTC thermistor is attached to the battery pack surface to enhance heat conduction, allowing the NTC thermistor to reflect the battery pack temperature more quickly. The temperature detection module includes a microcontroller with an integrated analog-to-digital converter (ADC). The NTC thermistor is connected in series with a precision resistor of fixed resistance to form a voltage divider circuit. One end of this voltage divider circuit is connected to the ADC input pin of the microcontroller, and the other end is grounded. When the battery pack temperature changes, the resistance of the NTC thermistor changes accordingly, causing a change in the output voltage of the voltage divider circuit. The microcontroller acquires this output voltage signal in real time via the ADC and determines the voltage based on the pre-stored NTC thermistor resistance value within the microcontroller. The temperature characteristic curve converts the collected voltage signal into a corresponding temperature value. The control module is connected to the microcontroller of the temperature detection module and receives the temperature value sent by the temperature detection module. The control module has preset high-temperature protection thresholds (e.g., 45℃) and low-temperature protection thresholds (e.g., 5℃). When the temperature value detected by the temperature detection module exceeds the high-temperature protection threshold, the control module immediately cuts off the charging input circuit of the power bank and stops charging the battery pack to prevent damage to the battery pack due to overheating or to prevent safety accidents. At the same time, if the power bank is discharging, the control module reduces the discharge current to reduce the heat generation of the battery pack. When the temperature value detected by the temperature detection module is lower than the low-temperature protection threshold, the control module prohibits the power bank from fast charging and adopts a low-current charging mode to avoid lithium ion precipitation inside the battery pack in low-temperature environments, which would lead to battery performance degradation and safety hazards. The display module uses an OLED display screen and is connected to the control module. The control module processes the temperature value detected by the temperature detection module, as well as the remaining power and charging status of the power bank, and sends it to the OLED display screen for display. The OLED display screen intuitively displays the real-time status information of the power bank to the user with a clear digital and graphical interface.

[0009] Preferably, the simplified NTC layout module includes multiple NTC thermistors, which are respectively arranged in different key parts of the battery pack, such as the top, bottom and middle of the side of the battery pack; the temperature detection module processes the temperature signal detected by each NTC thermistor, and the control module integrates the temperature information from multiple locations and uses a weighted average algorithm to calculate the average temperature of the battery pack, so as to more accurately reflect the overall temperature status of the battery pack.

[0010] Preferably, the power bank casing is provided with heat dissipation holes, which are evenly distributed in strip or circle shape on the side or bottom of the power bank casing; a dustproof mesh is installed inside the heat dissipation holes to prevent dust from entering the power bank and affecting the normal operation of electronic components; when the temperature detection module detects that the battery pack temperature is close to the high temperature protection threshold, the control module starts the built-in small cooling fan to accelerate the air circulation inside the power bank through the heat dissipation holes and improve the heat dissipation efficiency.

[0011] Preferably, the control module also has a temperature compensation function, which dynamically adjusts the output voltage and current of the power bank according to the battery pack temperature detected by the temperature detection module; in low temperature environment, the output voltage and current are appropriately increased to compensate for the voltage drop caused by the increase in battery internal resistance, ensuring that the power bank can normally supply power to external devices; in high temperature environment, the output voltage and current are reduced to reduce battery pack heat generation and extend battery pack life.

[0012] Preferably, the power bank also has a charging interface and a discharging interface. The charging interface uses a USB-C interface or a Micro-USB interface for connecting to an external power source to charge the battery pack. The discharging interface includes a USB-A interface and a USB-C interface, which can supply power to multiple external devices simultaneously. When the control module controls the power bank to stop charging or adjust the charging mode, it does so by controlling the on / off state of the charging interface or adjusting the charging current. When the control module controls the power bank to adjust the discharging mode, it does so by controlling the output voltage and current of the discharging interface.

[0013] Preferably, the display module also has an alarm function. When the temperature value detected by the temperature detection module exceeds the preset high temperature warning threshold or falls below the preset low temperature warning threshold, the display module will issue an alarm to the user by flashing or emitting a buzzer sound, reminding the user to take timely measures.

[0014] Preferably, when the control module integrates temperature information from multiple locations, it also considers the rate of temperature change at different locations; if the rate of temperature change at a certain location exceeds a preset value, the control module immediately takes corresponding protective measures, such as cutting off the charging or discharging circuit, to prevent local overheating from causing a safety accident.

[0015] Preferably, the microcontroller in the temperature detection module also has a data storage function, which can store the temperature change data of the battery pack over a period of time. The storage period can be set from 1 day to 30 days according to actual needs. The control module can read the data and analyze it to generate a temperature change curve so that users can understand the temperature change trend of the battery pack and discover potential safety hazards in advance.

[0016] Preferably, the power bank and temperature detection system also have wireless communication capabilities, communicating with external devices via a built-in Bluetooth module or Wi-Fi module; users can remotely monitor the power bank's temperature, remaining power, and other information through a dedicated application installed on the external device, and can remotely set the power bank's charging and discharging modes.

[0017] Preferably, the B-value constant of the NTC thermistor is between 3500K and 3900K to obtain a more accurate temperature detection effect; at the same time, during the production process of the NTC thermistor, it is subjected to strict aging screening to ensure its stable and reliable performance and reduce temperature detection errors caused by changes in the performance of the NTC thermistor.

[0018] Compared with the prior art, the present invention provides a power bank and temperature detection system with a simplified NTC layout, which has the following advantages: This power bank and temperature detection system features a simplified NTC layout. By employing a simplified NTC layout module, NTC thermistors are placed at multiple key locations within the battery pack. It integrates temperature information from multiple locations and uses a weighted average algorithm to calculate the average temperature. It also considers the rate of temperature change at different locations, reducing the error between the temperature detection results and the actual overall temperature of the battery pack. Furthermore, it can respond quickly to localized overheating, effectively preventing safety accidents and ensuring the safe use of the power bank.

[0019] This power bank and temperature detection system features a simple NTC layout. By setting up heat dissipation holes and installing dust filters, along with a small cooling fan, it accelerates internal airflow and improves heat dissipation efficiency at high temperatures. The control module has a temperature compensation function, which adjusts the output voltage and current according to different temperature environments. It compensates for voltage drop at low temperatures to ensure normal power supply, and reduces heat generation at high temperatures to extend the battery pack's lifespan.

[0020] This power bank and temperature detection system features a simple NTC layout. It includes a display module to visually show the power bank's real-time status and an alarm function to alert users. It supports wireless communication, allowing users to remotely monitor and set power bank parameters via a mobile application. The temperature detection module's microcontroller stores and analyzes temperature data, generating change curves to help users identify potential safety hazards in advance, thus meeting diverse user needs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a power bank and temperature detection system with a simplified NTC layout proposed in this invention. Detailed Implementation

[0022] To more clearly and completely illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings.

[0023] Example like Figure 1As shown in the figure, an embodiment of the present invention proposes a power bank and temperature detection system with a simplified NTC layout, the specific implementation of which is as follows: Power bank shell: The shell is made of high-strength, flame-retardant polycarbonate engineering plastic, and is designed as a cuboid. Based on the common capacity requirements of power banks, the dimensions are set to 150mm in length, 70mm in width, and 20mm in height. The shell consists of an upper cover and a lower cover, which are fixedly connected by four screws to form a closed internal space, providing reliable physical protection for the internal components. The battery pack consists of four lithium-ion battery cells connected in series and placed inside the power bank shell. A plastic battery mounting bracket is used to firmly fix the battery pack, ensuring that the battery pack will not shift or shake during use, such as when the power bank is carried or shaken, thus ensuring safe use. The simplified NTC layout module uses a surface-mount NTC thermistor with a package size of 0402, which has the characteristics of small size and fast thermal response. The tested thermal response time (time required to reach 90% resistance change) is 0.8 seconds. The NTC thermistor was attached to the positive and negative terminals of the battery pack using conductive silver paste, precisely controlled at a distance of 2mm from the terminals to ensure accurate sensing of temperature changes in critical parts of the battery pack. A layer of thermal grease was evenly applied to the attachment area to enhance heat conduction. Actual testing showed that after applying the thermal grease, the NTC thermistor's response time to battery pack temperature was shortened by 0.3 seconds, enabling a more rapid temperature response. The temperature detection module uses a microcontroller with an integrated 12-bit analog-to-digital converter (ADC). The NTC thermistor was connected in series with a 10kΩ precision resistor (1% accuracy) to form a voltage divider circuit. One end of the voltage divider circuit was connected to the ADC input pin of the microcontroller, and the other end was grounded. When the battery pack temperature changes, for example, from 25°C to 35°C, the resistance of the NTC thermistor changes from 10kΩ to approximately 6kΩ, causing a change in the output voltage of the voltage divider circuit. The microcontroller acquires the output voltage signal in real time via an ADC and converts it into a corresponding temperature value based on the resistance-temperature characteristic curve of the NTC thermistor pre-stored within the microcontroller. Multiple tests have verified that the temperature detection error is within ±0.5℃. The control module and the temperature detection module's microcontroller are connected via an I2C bus, with the control module receiving the temperature value sent by the temperature detection module. The control module has a preset high-temperature protection threshold of 45℃ and a low-temperature protection threshold of 5℃. When the temperature detected by the temperature detection module exceeds the high-temperature protection threshold, such as reaching 46℃, the control module immediately sends a control signal to the MOSFET in the charging input circuit to cut off the charging input circuit, stopping the charging of the battery pack and preventing damage or safety accidents due to overheating.Meanwhile, if the power bank is discharging, the control module adjusts the resistance value in the discharge control circuit to reduce the discharge current from 2A to 1A, thereby reducing battery heat generation. When the temperature detected by the temperature detection module is below the low-temperature protection threshold, such as 4℃, the control module sends a command to the charging control circuit to prohibit fast charging and adopt a low-current charging mode, reducing the charging current from 2A to 0.5A to prevent lithium-ion deposition inside the battery pack in low-temperature environments, which could lead to performance degradation and safety hazards. The display module uses a 128×64 resolution OLED display screen, connected to the control module via an SPI interface. The control module processes information such as the temperature value detected by the temperature detection module (e.g., 30℃), the remaining power of the power bank (e.g., 75%), and the charging status (e.g., charging in progress), and sends it to the OLED display screen for display. The OLED display screen intuitively displays the real-time status information of the power bank to the user with a clear digital and graphical interface, allowing the user to understand the power bank's working status at a glance.

[0024] In this invention, the simplified NTC layout module includes three NTC thermistors, respectively located at the top, bottom, and middle of the side of the battery pack. The temperature detection module processes the temperature signal detected by each NTC thermistor; for example, the top NTC thermistor detects a temperature of 32℃, the bottom 31℃, and the middle side 31.5℃. The control module integrates the temperature information from multiple locations and uses a weighted average algorithm to calculate the average temperature of the battery pack. Assuming the top has a weight of 0.4, the bottom 0.3, and the middle side 0.3, the average temperature of the battery pack = 32 × 0.4 + 31 × 0.3 + 31.5 × 0.3 = 31.55℃, thus more accurately reflecting the overall temperature of the battery pack. Actual testing showed that after adopting the weighted average algorithm, the error between the temperature detection result and the actual overall temperature of the battery pack decreased from ±0.8℃ to ±0.3℃.

[0025] In this invention, the power bank casing has 20 circular, evenly distributed ventilation holes on its side, each 3mm in diameter. A dustproof mesh with 0.5mm pores is installed inside the ventilation holes to effectively prevent dust from entering the power bank and affecting the normal operation of electronic components. When the temperature detection module detects that the battery pack temperature is approaching the high-temperature protection threshold, such as 43°C, the control module activates a built-in small cooling fan at 3000 rpm. This fan accelerates airflow inside the power bank through the ventilation holes, reducing the battery pack temperature from 43°C to 40°C within 5 minutes, thus improving heat dissipation efficiency.

[0026] In this invention, the control module has a temperature compensation function. When the temperature detection module detects that the battery pack temperature is 5℃ (low temperature environment), the control module increases the power bank's output voltage from 5V to 5.2V and the output current from 1A to 1.2A according to a preset temperature compensation algorithm to compensate for the voltage drop caused by the increased internal resistance of the battery, ensuring that the power bank can normally power external devices. Testing showed that the external devices can work stably. When the battery pack temperature is 40℃ (high temperature environment), the control module reduces the output voltage from 5V to 4.8V and the output current from 1A to 0.8A to reduce battery pack heat generation. Long-term testing showed that the battery pack's lifespan was extended by 15% compared to when no temperature compensation was applied.

[0027] In this invention, the power bank has a charging interface and a discharging interface. The charging interface uses a USB-C interface for connecting to an external power source to charge the battery pack; the discharging interface includes one USB-A interface and one USB-C interface, which can simultaneously power two external devices. When the control module needs to stop the power bank from charging, it sends a control signal to the charging control chip in the charging interface to cut off the charging circuit, thereby stopping charging. When it is necessary to adjust the charging mode, such as from fast charging mode to normal charging mode, the control module adjusts the charging current from 2A to 1A by adjusting the current regulating resistor in the charging interface. When controlling the power bank to adjust the discharging mode, for example, from high-current discharging mode to low-current discharging mode, the control module adjusts the output voltage from 5V to 4.5V and the output current from 2A to 1A by controlling the voltage regulating chip and current limiting chip in the discharging interface.

[0028] In this invention, the display module has an alarm function. The preset high-temperature warning threshold is 48℃, and the low-temperature warning threshold is 2℃. When the temperature detected by the temperature detection module exceeds the high-temperature warning threshold, such as reaching 49℃, the display module issues an alarm to the user by rapidly flashing (at a flashing frequency of 2Hz); when the temperature is below the low-temperature warning threshold, such as dropping to 1℃, the display module emits a buzzer sound at a frequency of 1kHz, reminding the user to take timely measures, such as stopping use or performing heat preservation / dissipation treatment on the power bank.

[0029] In this invention, the control module considers the temperature change rate at different locations when integrating temperature information from multiple locations. For example, within one minute, the temperature at the top of the battery pack rises from 30°C to 35°C, a rate of change of 5°C / minute; the temperature at the bottom rises from 29°C to 31°C, a rate of change of 2°C / minute. A preset temperature change rate threshold of 4°C / minute is set. If the temperature change rate at a certain location exceeds this threshold, such as the top temperature exceeding 4°C / minute, the control module immediately takes protective measures to cut off the charging or discharging circuit to prevent localized overheating and potential safety accidents. Actual testing shows that under simulated localized overheating conditions, the control module can cut off the circuit within 0.5 seconds, effectively preventing safety accidents.

[0030] In this invention, the microcontroller in the temperature detection module has a data storage function, capable of storing battery pack temperature change data over 15 days. The control module can read this data and analyze it using built-in data analysis software to generate a temperature change curve. For example, data analysis reveals that between 12:00 and 14:00 each day, the battery pack temperature rises with the ambient temperature, reaching a maximum of 38°C; between 22:00 and 6:00 at night, the temperature gradually decreases to around 25°C. Users can view the temperature change curve to understand the battery pack's temperature trend and proactively identify potential safety hazards, such as abnormal temperature increases or decreases.

[0031] In this invention, the power bank and temperature detection system have wireless communication capabilities, communicating with external devices (such as mobile phones) via a built-in Bluetooth module. Users install a dedicated application on their phones; upon opening the application, the phone and the power bank's Bluetooth module automatically pair and connect. After successful connection, users can remotely monitor the power bank's temperature (e.g., displaying a current temperature of 30°C), remaining battery power (e.g., displaying 60% remaining power) on the application interface, and can remotely set the power bank's charging and discharging modes, such as setting the charging current to 1A and the discharging voltage to 5V. Testing shows that the wireless communication distance can reach 10 meters in open environments, meeting users' daily needs.

[0032] In this invention, the selected NTC thermistor has a B-value constant of 3700K. When performing temperature detection within the range of 25-50℃, it achieves more accurate temperature detection, reducing the temperature detection error from ±0.5℃ to ±0.2℃. Simultaneously, during the production process of the NTC thermistor, it undergoes rigorous aging screening. The NTC thermistors are aged at a high temperature (85℃) for 168 hours, and their performance parameters are then tested to select stable and reliable NTC thermistors. Actual testing shows that after 6 months of use, the performance parameter change rate of the NTC thermistors after aging screening is less than 1%, effectively reducing temperature detection errors caused by changes in the performance of the NTC thermistors.

[0033] Finally, it should be noted that the basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this specification. Such modifications, improvements, and corrections are suggested in this specification, and therefore remain within the spirit and scope of the exemplary embodiments of this specification. Furthermore, this specification uses specific terms to describe embodiments of this specification. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a feature, structure, or characteristic associated with at least one embodiment of this specification. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this specification can be appropriately combined. Moreover, unless expressly stated in the claims, the order of processing elements and sequences, the use of numbers and letters, or other names described in this specification are not intended to limit the order of the processes and methods of this specification.

[0034] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are 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 power bank and temperature detection system with a simplified NTC layout, comprising the following components and implementation steps: Power bank main structure The power bank's outer shell is made of high-strength, flame-retardant engineering plastic, providing physical protection for the internal components. It is rectangular in shape, with dimensions designed according to actual capacity requirements. It has an upper and lower cover, which are fixed together by buckles or screws to form a closed internal space. The battery pack, composed of multiple lithium-ion battery cells connected in series or parallel, is placed inside the power bank's casing and secured by a battery mounting bracket to ensure that the battery pack does not shake during power bank use. Simplified NTC Layout Module The surface-mount NTC thermistor is selected, with a package size of 0402 or 0603. It features small size and fast thermal response, with a thermal response time (the time required to reach 90% resistance change) of less than 1 second. The NTC thermistor is attached to the surface of the battery pack using conductive adhesive, specifically near the positive and negative terminals of the battery pack, no more than 3mm away from the terminals, to ensure accurate sensing of temperature changes in key parts of the battery pack; at the same time, a layer of thermal grease is applied to the area where the NTC thermistor is attached to the battery pack surface to enhance the heat conduction effect, so that the NTC thermistor can reflect the temperature of the battery pack more quickly. Temperature detection module It includes a microcontroller with an integrated analog-to-digital converter (ADC); an NTC thermistor is connected in series with a precision resistor of fixed value to form a voltage divider circuit, one end of which is connected to the ADC input pin of the microcontroller and the other end is grounded; When the battery pack temperature changes, the resistance of the NTC thermistor changes accordingly, causing the output voltage of the voltage divider circuit to change. The microcontroller acquires this output voltage signal in real time through the ADC and converts the acquired voltage signal into the corresponding temperature value according to the NTC thermistor resistance-temperature characteristic curve stored in the microcontroller. Control module It is connected to the microcontroller of the temperature detection module and receives the temperature value sent by the temperature detection module; the control module has preset high temperature protection threshold (e.g., 45℃) and low temperature protection threshold (e.g., 5℃). When the temperature detected by the temperature detection module exceeds the high temperature protection threshold, the control module immediately cuts off the charging input circuit of the power bank and stops charging the battery pack to prevent the battery pack from being damaged due to overheating or causing a safety accident. At the same time, if the power bank is discharging externally, the control module reduces the discharge current to reduce the heat generated by the battery pack. When the temperature detected by the temperature detection module is lower than the low temperature protection threshold, the control module prohibits the power bank from fast charging and adopts a low current charging mode to avoid lithium ion precipitation inside the battery pack in low temperature environment, which would lead to battery performance degradation and safety hazards. Display module An OLED display screen is used and connected to the control module. The control module processes the temperature value detected by the temperature detection module, as well as information such as the remaining power and charging status of the power bank, and then sends it to the OLED display screen for display. The OLED display screen intuitively shows the user the real-time status information of the power bank with a clear digital and graphical interface.

2. The power bank and temperature detection system with a simplified NTC layout according to claim 1, characterized in that, The simplified NTC layout module contains multiple NTC thermistors, which are arranged in different key parts of the battery pack, such as the top, bottom and middle of the side of the battery pack. The temperature detection module processes the temperature signal detected by each NTC thermistor, and the control module integrates the temperature information from multiple locations and uses a weighted average algorithm to calculate the average temperature of the battery pack, so as to more accurately reflect the overall temperature status of the battery pack.

3. A power bank and temperature detection system with a simplified NTC layout as described in claim 1, characterized in that, The power bank casing is equipped with heat dissipation holes, which are evenly distributed in strip or circle shape on the side or bottom of the power bank casing. A dustproof mesh is installed inside the heat dissipation holes to prevent dust from entering the power bank and affecting the normal operation of electronic components. When the temperature detection module detects that the battery pack temperature is close to the high temperature protection threshold, the control module starts the built-in small cooling fan to accelerate the air circulation inside the power bank through the heat dissipation holes and improve the heat dissipation efficiency.

4. A power bank and temperature detection system with a simplified NTC layout as described in claim 1, characterized in that, The control module also has a temperature compensation function, which dynamically adjusts the output voltage and current of the power bank according to the battery pack temperature detected by the temperature detection module. In low-temperature environments, the output voltage and current are appropriately increased to compensate for the voltage drop caused by the increase in battery internal resistance, ensuring that the power bank can supply power to external devices normally. In high-temperature environments, the output voltage and current are reduced to reduce battery pack heat generation and extend battery pack life.

5. A power bank and temperature detection system with a simplified NTC layout as described in claim 1, characterized in that, The power bank also has a charging interface and a discharging interface. The charging interface uses a USB-C interface or a Micro-USB interface for connecting to an external power source to charge the battery pack. The discharging interface includes a USB-A interface and a USB-C interface, which can power multiple external devices simultaneously. When the control module controls the power bank to stop charging or adjust the charging mode, it does so by controlling the on / off state of the charging interface or adjusting the charging current. When the control module controls the power bank to adjust the discharging mode, it does so by controlling the output voltage and current of the discharging interface.

6. A power bank and temperature detection system with a simplified NTC layout as described in claim 1, characterized in that, The display module also has an alarm function. When the temperature value detected by the temperature detection module exceeds the preset high temperature warning threshold or falls below the preset low temperature warning threshold, the display module will issue an alarm to the user by flashing or emitting a buzzer sound, reminding the user to take timely measures.

7. A power bank and temperature detection system with a simplified NTC layout as described in claim 1, characterized in that, When integrating temperature information from multiple locations, the control module also considers the rate of temperature change at different locations. If the rate of temperature change at a certain location exceeds a preset value, the control module immediately takes corresponding protective measures, such as cutting off the charging or discharging circuit, to prevent local overheating from causing a safety accident.

8. A power bank and temperature detection system with a simplified NTC layout as described in claim 1, characterized in that, The microcontroller in the temperature detection module also has a data storage function, which can store the temperature change data of the battery pack over a period of time. The storage period can be set from 1 day to 30 days according to actual needs. The control module can read and analyze the data to generate a temperature change curve so that users can understand the temperature change trend of the battery pack and discover potential safety hazards in advance.

9. A power bank and temperature detection system with a simplified NTC layout according to claim 1, characterized in that, The power bank and temperature detection system also have wireless communication capabilities, communicating with external devices via a built-in Bluetooth or Wi-Fi module. Users can remotely monitor the power bank's temperature, remaining power, and other information through a dedicated application installed on the external device, and can also remotely set the power bank's charging and discharging modes.

10. A power bank and temperature detection system with a simplified NTC layout according to claim 1, characterized in that, The B-value constant of the NTC thermistor is between 3500K and 3900K to obtain a more accurate temperature detection effect. At the same time, during the production process of the NTC thermistor, it is subjected to strict aging screening to ensure its stable and reliable performance and reduce temperature detection errors caused by changes in the performance of the NTC thermistor.

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