Battery cell replaceable power bank with temperature alarm function

Abstract

The utility model relates to a replaceable cell power bank with a temperature alarm function, and belongs to the field of electronic products. The power bank comprises a single cell, a DCDC, an STM32F103 single-chip microcomputer, a DS18B20 temperature sensor, a 4-bit nixie tube, a button and a buzzer. The basic functions comprise: 1, normal charging and discharging and battery cell replacement; 2, temperature measurement and display, wherein an STM32F103 single-chip microcomputer is used for reading data of a DS18B20 temperature sensor; and the converted temperature value is sent to a 4-bit nixie tube to be displayed. And 3, a temperature alarm function: setting upper and lower temperature limit values, and storing the upper and lower temperature limit values in an internal FLASH of the STM32F103 single-chip microcomputer. When the temperature exceeds the upper limit value and the lower limit value, the alarm is triggered to give an alarm. And 4, a parameter setting function: setting upper and lower temperature limit values through key operation, and storing the set values in an internal FLASH. And 5, a parameter storage function. According to the utility model, the portable power supply with convenient and reliable temperature monitoring and alarm functions is realized.

Description

Technical Field

[0001] The utility model belongs to the field of electronic products and relates to a replaceable battery cell power bank with a temperature alarm function. Background Art

[0002] In the current use of power banks, in addition to the heat generated during charging and discharging, battery aging will also affect the temperature rise of the power bank. As the battery gradually ages, its internal resistance increases, resulting in more heat generated during the charging and discharging process. Therefore, aged batteries tend to generate higher temperature rises than new batteries under the same conditions of use.

[0003] Current power bank solutions often do not consider the impact of battery aging on temperature rise. This means that even if the battery inside the power bank has aged, it will continue to supply power without corresponding measures to limit the temperature rise. This further increases the possibility of power bank overheating and thermal runaway risks.

[0004] To solve this problem, the design of new power banks should consider the impact of battery aging on temperature rise and take corresponding measures to reduce the risk. The design can introduce a battery aging detection function to monitor the battery status and performance degradation. When the battery aging causes the temperature rise to exceed the safe range, the power bank should automatically reduce the charging rate or stop supplying power to protect the safety of the battery and the user.

[0005] In addition, providing battery replacement services is also a solution. Allowing users to replace aging batteries can extend the service life of the power bank and reduce the temperature rise problem caused by battery aging.

[0006] In summary, the impact of battery aging on temperature rise needs to be considered when solving the overheating problem of power banks. New designs should include battery aging detection functions and corresponding control strategies so that appropriate measures can be taken when battery aging causes the temperature rise to exceed the safe range. Such a design will improve the reliability and safety of power banks and protect users from overheating and thermal runaway problems. At the same time, providing battery replacement services is also a feasible solution to extend the service life of power banks and reduce safety risks. Utility Model Content

[0007] In view of this, the purpose of the utility model is to provide a replaceable battery power bank with a temperature alarm function, which is designed based on the STM32F103 microcontroller and the temperature sensor DS18B20 to realize temperature measurement and alarm functions.

[0008] In order to achieve the above object, the utility model provides the following technical solutions:

[0009] Replaceable battery power bank with temperature alarm function, including:

[0010] A power bank with replaceable 18650 cells, connected to the battery management system, provides power to the power bank and thermal management circuits;

[0011] A processor unit, used to control the functions and operations of the power bank, connected to the temperature sensor, display unit, alarm device and power management unit;

[0012] A temperature sensor, connected to the processor unit, is used to transmit real-time temperature data to the processor unit;

[0013] A display unit connected to the processor unit to display temperature values;

[0014] An alarm device, used to trigger an alarm signal when the temperature exceeds a preset range, connected to the processor unit, and the alarm signal is triggered by the processor unit to alert the user by means of sound and light alarm;

[0015] A power management unit, the power management unit is connected with the processor unit and the relay to realize high temperature power-off protection, and the relay cuts off the power supply;

[0016] At least one of the relays serves as a power failure protection device.

[0017] Optionally, the processor unit includes:

[0018] A microcontroller is connected to the temperature sensor via a digital interface and is used for receiving and processing temperature data from the temperature sensor;

[0019] A memory, connected to the microcontroller via a corresponding bus, for storing preset upper and lower temperature limits and a high temperature power-off protection threshold;

[0020] The input interface is connected to the microcontroller through the GPIO digital input interface and is used to receive the user's parameter settings.

[0021] Optionally, the temperature sensor is a DS18B20 temperature sensor, which is electrically connected to the processor unit.

[0022] Optionally, the display unit is a 4-digit digital tube for displaying the measured temperature value in a readable format.

[0023] Optionally, the alarm device is a buzzer, which is used to send an alarm signal when the temperature exceeds a preset range.

[0024] Optionally, the memory is an internal FLASH memory, which is used to save the set upper and lower temperature limits and high-temperature power-off protection threshold, and restore the settings when power is restored after power failure.

[0025] Optionally, the input interface is a button for the user to set upper and lower temperature limits and adjust the temperature alarm value.

[0026] Optionally, the power management unit includes:

[0027] A high temperature detection module, connected to the microcontroller, is used to monitor the temperature inside the power bank;

[0028] The power-off protection device is connected to the power supply and is used to cut off the power supply when the temperature exceeds the high-temperature power-off protection threshold. The power-off protection device is a relay.

[0029] Optionally, the relay is electrically connected to the power supply unit to cut off or restore power supply.

[0030] The beneficial effects of the utility model are:

[0031] (1) Temperature measurement: The DS18B20 temperature sensor can measure temperature in the range of 0 to 99.9 degrees Celsius with an accuracy of 0.1 degrees Celsius. The working status of the power bank can be obtained by measuring the temperature to avoid thermal runaway accidents.

[0032] (2) Upper and lower temperature settings: The power bank can set upper and lower temperature limits, with the default upper temperature limit being 48°C and the default lower temperature limit being 5°C. The initial values ​​of these upper and lower temperature limits can be changed through the program to adapt to different usage requirements.

[0033] (3) Alarm value setting range: The alarm function of the power bank allows users to set the alarm value range. The lowest upper alarm value is equal to the current lower alarm value, and the highest lower alarm value is equal to the current upper alarm value. Users can adjust the alarm value as needed to meet specific temperature monitoring requirements.

[0034] (4) High temperature power-off function: The power bank has a high temperature power-off protection function. When the temperature exceeds the set upper limit, the power bank will automatically disconnect the power output to prevent safety risks caused by excessive temperature. When the temperature returns to a safe range, the power bank will not supply power to prevent thermal runaway and maximize the safety of the power bank.

[0035] (5) Lower limit alarm function: The temperature control system of the power bank supports the lower limit alarm function. When the lower limit alarm value is adjusted to 0, the lower limit alarm function can be turned off to avoid unnecessary alarms.

[0036] (6) Replaceable battery design: This power bank adopts a replaceable battery design, which allows users to easily replace the battery, extending the service life and reliability of the power bank. At the same time, the temperature alarm function also applies to the replaced battery, ensuring the overall safety of the power bank.

[0037] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:

[0039] Figure 1 Schematic diagram of the temperature management system

[0040] Figure 2 It is a schematic diagram of the alarm temperature adjustment method;

[0041] Figure 3 This is a schematic diagram of the implementation process of temperature detection, alarm, and power off of the power bank;

[0042] Figure 4 The effect of power bank aging on battery temperature rise. DETAILED DESCRIPTION

[0043] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The following embodiments and the features in the embodiments can be combined with each other without conflict.

[0044] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present utility model. In order to better illustrate the embodiments of the present utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0045] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate directions or positional relationships, they are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0046] like Figure 1 As shown, the utility model provides a replaceable battery cell power bank with a temperature alarm function, and the method of using the power bank includes the following steps:

[0047] (I) How to adjust the temperature control range of the power bank, such as Figure 2 As shown:

[0048] The temperature control range of the power bank can be set and adjusted through the program. Using the buttons on the STM32 microcontroller or other user interfaces, the user can enter the setting interface and modify the initial values ​​of the upper and lower temperature limits as needed.

[0049] The user can use the increase or decrease buttons to gradually adjust the upper and lower temperature setting values, which are updated in real time on the display.

[0050] (II) The implementation process of power bank temperature detection, alarm, and power off, such as Figure 3 As shown:

[0051] 1. The temperature sensor DS18B20 is connected to the STM32 microcontroller through the communication interface to transmit the temperature value to the microcontroller for processing.

[0052] 2. The STM32 microcontroller periodically reads the value of the temperature sensor and compares it with the set upper and lower temperature limits.

[0053] 3. If the temperature exceeds the set upper limit temperature T1, the alarm function is triggered. The alarm signal can be issued through a buzzer, LED light or display screen to remind the user of abnormal temperature.

[0054] 4. When the temperature returns to a safe range, the STM32 microcontroller will restart supplying power and the power bank will resume normal operation.

[0055] 5. At the same time, if the temperature exceeds the set upper limit temperature T2, the STM32 microcontroller will automatically disconnect the power output to implement the high temperature power-off protection function. At this time, the power bank will not resume normal working state.

[0056] (III) How to replace the battery cell of a power bank:

[0057] As the power bank ages, the internal resistance of the battery increases, the capacity decreases, and the charging and discharging temperature rises (such as Figure 4 Continuing to use it will affect the user experience and may cause safety hazards.

[0058] 1. The power bank is designed with replaceable battery cells, which makes it convenient for users to replace battery cells to extend service life and reduce resource waste.

[0059] 2. Users can find the location to replace the battery according to the instructions of the power bank.

[0060] 3. Users can easily remove the old battery cells by removing the corresponding outer shell or opening the battery cell compartment door.

[0061] 4. When replacing the battery cell, the user needs to ensure that the appropriate new battery cell is selected and the positive and negative poles of the battery cell are correctly connected.

[0062] 5. After completing the replacement, the user installs the new battery back into the power bank and ensures that the connection is secure.

[0063] 6. After replacing the battery cell, the power bank's temperature detection, alarm and power-off functions will be applicable to the new battery cell to ensure overall safety.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A replaceable battery power bank with temperature alarm function, characterized by: include: A power bank with replaceable 18650 cells, connected to the battery management system, provides power to the power bank and thermal management circuits; A processor unit, used to control the functions and operations of the power bank, connected to the temperature sensor, display unit, alarm device and power management unit; A temperature sensor, connected to the processor unit, is used to transmit real-time temperature data to the processor unit; A display unit connected to the processor unit to display temperature values; An alarm device, used to trigger an alarm signal when the temperature exceeds a preset range, connected to the processor unit, and the alarm signal is triggered by the processor unit to alert the user by means of sound and light alarm; A power management unit, the power management unit is connected with the processor unit and the relay to realize high temperature power-off protection, and the relay cuts off the power supply; At least one of the relays is used as a power failure protection device; The processor unit comprises: A microcontroller is connected to the temperature sensor via a digital interface and is used for receiving and processing temperature data from the temperature sensor; A memory, connected to the microcontroller via a corresponding bus, for storing preset upper and lower temperature limits and a high temperature power-off protection threshold; An input interface is connected to the microcontroller via a GPIO digital input interface to receive parameter settings from the user; The temperature sensor is a DS18B20 temperature sensor, which is electrically connected to the processor unit; The display unit is a 4-digit digital tube, which is used to display the measured temperature value in a readable format; The alarm device is a buzzer, which is used to send out an alarm signal when the temperature exceeds a preset range; The memory is an internal FLASH memory, which is used to save the set upper and lower temperature limits and high temperature power-off protection threshold, and restore the settings when power is turned on again after power failure.

2. The replaceable battery cell power bank with temperature alarm function according to claim 1, characterized in that: The input interface is a button for the user to set the upper and lower temperature limits and adjust the temperature alarm value.

3. The replaceable battery cell power bank with temperature alarm function according to claim 1, characterized in that: The power management unit comprises: A high temperature detection module, connected to the microcontroller, is used to monitor the temperature inside the power bank; The power-off protection device is connected to the power supply and is used to cut off the power supply when the temperature exceeds the high-temperature power-off protection threshold. The power-off protection device is a relay.

4. The replaceable battery cell power bank with temperature alarm function according to claim 3, characterized in that: The relay is electrically connected to the power supply unit to cut off or restore power supply.

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