Temperature protection method and device for mobile phone mobile power supply in charging state

Abstract

The invention provides a temperature protection method and device for a mobile phone mobile power supply in a charging state. The method comprises the following steps: starting a temperature sensor to detect a first temperature and a second temperature; if the first temperature is larger than the safe temperature threshold value and the second temperature is smaller than or equal to the safe temperature threshold value, the first cooling fan is controlled to operate at the first rotating speed based on the second temperature and the temperature difference value between the first temperature and the safe temperature threshold value; if the first temperature is smaller than or equal to the safe temperature threshold value and the second temperature is larger than the safe temperature threshold value, the second cooling fan is controlled to operate at the second rotating speed based on the first temperature and the temperature difference value between the second temperature and the safe temperature threshold value; and if the first temperature is greater than the first safe temperature threshold value and the second temperature is greater than the second safe temperature threshold value, controlling the first cooling fan and the second cooling fan to operate at a third rotating speed and a fourth rotating speed respectively based on the first temperature difference value and the second temperature difference value. The mobile power supply can be in a safe temperature in the charging process.

Description

Technical Field

[0001] This invention relates to the field of power bank technology, and in particular to a method and apparatus for temperature protection of mobile power banks during charging. Background Technology

[0002] With the widespread use of smartphones and other mobile devices, portable power banks are widely used as portable charging devices. When a power bank is charging, its internal battery cells generate a significant amount of heat due to energy conversion and internal resistance losses, causing the temperature to rise. Excessive temperature not only reduces the charging efficiency and lifespan of the power bank but may also lead to safety accidents such as battery cell bulging, leakage, or even explosion, posing a serious threat to the personal safety and property of users. Therefore, developing effective cooling methods is crucial to ensure the safe and stable operation of portable power banks during charging.

[0003] Currently, the main method for cooling down mobile phone power banks during charging is to transfer heat to the outer casing using thermally conductive silicone pads. However, because different areas inside the power bank experience varying degrees of heat generation, relying solely on thermally conductive silicone pads for heat dissipation cannot precisely adjust the cooling based on the real-time temperature of different areas. This results in some high-temperature areas not dissipating heat in time, making it difficult to ensure that the power bank remains within a safe temperature range during charging. Summary of the Invention

[0004] This invention provides a method and apparatus for temperature protection of mobile power banks during charging, which enables heat dissipation control of the power bank during charging to adjust the temperature difference between different areas in real time, thereby ensuring that the power bank is within a safe temperature range during charging.

[0005] In a first aspect, the present invention provides a temperature protection method for a mobile power bank during charging. A first temperature sensor is disposed in the densely packed area of ​​the battery cells in the mobile power bank, and a second temperature sensor is disposed in the concentrated area of ​​circuit components. A first cooling fan corresponding to the densely packed area of ​​the battery cells and a second cooling fan corresponding to the concentrated area of ​​circuit components are provided on the casing of the mobile power bank. The temperature protection method includes: When the mobile power bank is charging, the first temperature sensor and the second temperature sensor are activated to detect the first temperature of the densely packed battery cell area and the second temperature of the concentrated circuit component area, respectively. If the first temperature is greater than the first safe temperature threshold and the second temperature is less than or equal to the second safe temperature threshold, then based on the second temperature and the first temperature difference between the first temperature and the first safe temperature threshold, the first cooling fan is controlled to run at the first speed. If the first temperature is less than or equal to the first safe temperature threshold and the second temperature is greater than the second safe temperature threshold, then based on the first temperature and the second temperature difference between the second temperature and the second safe temperature threshold, the second cooling fan is controlled to run at the second speed. If the first temperature is greater than the first safe temperature threshold and the second temperature is greater than the second safe temperature threshold, then the first cooling fan and the second cooling fan are controlled to run at the third speed and the fourth speed, respectively, based on the first temperature difference and the second temperature difference.

[0006] Secondly, the present invention also provides a temperature protection device for a mobile power bank during charging, applied to the temperature protection method for a mobile power bank during charging as described in any of the first aspects; a first temperature sensor is disposed in a densely packed area of ​​the battery cells of the mobile power bank, and a second temperature sensor is disposed in a concentrated area of ​​circuit components; a first cooling fan corresponding to the densely packed area of ​​the battery cells and a second cooling fan corresponding to the concentrated area of ​​circuit components are provided on the casing of the mobile power bank; the device includes: The temperature sensing module is used to activate the first temperature sensor and the second temperature sensor to detect the first temperature of the densely packed battery cell area and the second temperature of the concentrated circuit component area when the mobile power bank is charging. The first heat dissipation control module is configured to control the first cooling fan to run at a first speed based on the second temperature and the first temperature difference between the first temperature and the first safe temperature threshold if the first temperature is greater than the first safe temperature threshold and the second temperature is less than or equal to the second safe temperature threshold. The second heat dissipation control module is used to control the second cooling fan to run at a second speed based on the first temperature and the second temperature difference between the second temperature and the second safe temperature threshold if the first temperature is less than or equal to the first safe temperature threshold and the second temperature is greater than the second safe temperature threshold. The third heat dissipation control module is used to control the first cooling fan and the second cooling fan to run at a third speed and a fourth speed respectively based on the first temperature difference and the second temperature difference if the first temperature is greater than the first safe temperature threshold and the second temperature is greater than the second safe temperature threshold.

[0007] The present invention also provides an electronic device, comprising: a memory for storing computer software programs; and a processor for reading and executing the computer software programs, thereby realizing the temperature protection method for mobile power banks in the charging state as described above.

[0008] The present invention also provides a non-transitory computer-readable storage medium storing a computer software program, which, when executed by a processor, implements the temperature protection method for mobile power banks in the charging state as described above.

[0009] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the temperature protection method for mobile power banks in the charging state as described above.

[0010] The present invention provides a method and apparatus for temperature protection of a mobile power bank during charging. It employs two temperature sensors to detect the temperature of two areas within the power bank: one densely populated with battery cells, and the other with concentrated circuit components, each exhibiting different heat-generating characteristics. This enables precise temperature monitoring of different heat-generating areas. Simultaneously, dual cooling fans are incorporated. Based on a comparison of the temperature data of each area with a safe temperature threshold, the operating state and speed of the two cooling fans are adjusted accordingly, thereby precisely regulating the temperature differences between the areas. Furthermore, regardless of whether only one area exceeds the temperature limit or both areas do, the speed of the dual cooling fans can be accurately controlled to ensure that both high-temperature areas receive adequate heat dissipation, maintaining their temperatures within the safe threshold. This overcomes the limitation of real-time heat dissipation control during charging, preventing situations where some areas of the power bank experience insufficient heat dissipation. It allows for real-time adjustment of temperature differences between different areas of the power bank, ensuring that the mobile power bank remains within a safe temperature range during charging. Attached Figure Description

[0011] Figure 1 This is a flowchart illustrating the temperature protection method for mobile power banks during charging provided by the present invention. Figure 2 This is a schematic diagram of the temperature protection device for mobile power banks during charging provided by the present invention. Figure 3 A schematic diagram of an embodiment of the electronic device provided in this invention. Detailed Implementation

[0012] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0013] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0014] In the description of this invention, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this invention is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed herein.

[0015] Optional, see below Figure 1 , Figure 1 This is a flowchart illustrating a temperature protection method for a mobile power bank during charging, provided by the present invention. In this embodiment, the executing entity of the temperature protection method for a mobile power bank during charging is a temperature protection device. Optionally, the temperature protection device in this embodiment can be understood as the core processing unit of the mobile power bank.

[0016] Optionally, in this embodiment of the invention, a first temperature sensor is disposed in the densely packed area of ​​the battery cells in the mobile power bank, and a second temperature sensor is disposed in the concentrated area of ​​the circuit components; a first cooling fan corresponding to the densely packed area of ​​the battery cells and a second cooling fan corresponding to the concentrated area of ​​the circuit components are provided on the casing of the mobile power bank. Therefore, the temperature protection method for a mobile power bank in the charging state includes: Step 10: When the mobile power bank is charging, the first temperature sensor and the second temperature sensor are activated to detect the first temperature of the densely packed battery cell area and the second temperature of the concentrated circuit component area, respectively.

[0017] Optionally, when the mobile power bank is charging, the temperature protection device will activate the first and second temperature sensors.

[0018] The first temperature sensor is specifically designed to detect the temperature of the densely packed battery cell area, which is the core of the power bank's energy storage and is prone to heat accumulation during charging and discharging. The second temperature sensor is responsible for detecting the temperature of the area where circuit components are concentrated, including key components such as the charging management chip, capacitors, and resistors, which also generate heat when current flows through them.

[0019] Therefore, after the temperature sensor is activated, the first temperature sensor detects the first temperature in the densely packed area of ​​the battery cells, and the second temperature sensor detects the second temperature in the concentrated area of ​​the circuit components.

[0020] In one embodiment, the mobile power bank is being charged via AC power. At this time, the temperature protection device automatically activates the first and second temperature sensors. The first temperature sensor is installed in the middle of the battery cell assembly inside the power bank, and it monitors the temperature of the densely packed cell area in real time, obtaining a first temperature of 38°C. The second temperature sensor is installed in the area with the most concentrated circuit components on the circuit board, and it detects a second temperature of 32°C for this area.

[0021] Step 20: If the first temperature is greater than the first safe temperature threshold and the second temperature is less than or equal to the second safe temperature threshold, then based on the second temperature and the first temperature difference between the first temperature and the first safe temperature threshold, control the first cooling fan to run at the first speed.

[0022] Furthermore, the temperature protection device is set with a first safe temperature threshold for the densely packed area of ​​battery cells and a second safe temperature threshold for the concentrated area of ​​circuit components. Therefore, the temperature protection device will compare the first temperature collected by the first temperature sensor with the first safe temperature threshold, and at the same time, it will also compare the second temperature collected by the second temperature sensor with the second safe temperature threshold.

[0023] When the first temperature is greater than the first safe temperature threshold and the second temperature is less than or equal to the second safe temperature threshold, it indicates that the densely packed area of ​​the battery cells has overheated, while the temperature of the concentrated area of ​​circuit components is within the safe range. At this time, the temperature protection device determines the operating speed of the first cooling fan based on the second temperature and the temperature difference between the first temperature and the first safe temperature threshold, controlling the first cooling fan to operate at this first speed to focus on cooling the densely packed area of ​​the battery cells. The larger the first temperature difference, the more severe the overheating of the battery cells, and the higher the speed of the first cooling fan will be accordingly. Referring to the second temperature is to avoid adverse effects on the circuit components due to excessive local temperature differences during the heat dissipation process, as described in steps 201 to 204.

[0024] Step 30: If the first temperature is less than or equal to the first safe temperature threshold and the second temperature is greater than the second safe temperature threshold, then based on the first temperature and the second temperature difference between the second temperature and the second safe temperature threshold, control the second cooling fan to run at the second speed.

[0025] Furthermore, if the first temperature is less than or equal to the first safe temperature threshold, and the second temperature is greater than the second safe temperature threshold, it indicates that the temperature in the densely packed cell area is in a safe state, but the concentrated area of ​​circuit components is overheated. In this case, the temperature protection device will determine the operating speed of the second cooling fan based on the first temperature and the second temperature difference between the second temperature and the second safe temperature threshold, and control the second cooling fan to operate at this second speed, mainly targeting the concentrated area of ​​circuit components for heat dissipation. The larger the second temperature difference, the more severe the overheating of the circuit components, and the higher the speed of the second cooling fan will be. The reference to the first temperature is to combine the temperature of the cell area to reasonably adjust the heat dissipation intensity and prevent excessive heat dissipation from affecting the cell performance, as described in steps 301 to 304.

[0026] Step 40: If the first temperature is greater than the first safe temperature threshold and the second temperature is greater than the second safe temperature threshold, then control the first cooling fan and the second cooling fan to run at the third speed and the fourth speed respectively based on the first temperature difference and the second temperature difference.

[0027] Furthermore, when the temperature protection device detects that the first temperature is greater than the first safe temperature threshold and the second temperature is greater than the second safe temperature threshold, it indicates that overheating has occurred in both the densely packed battery cell area and the concentrated circuit component area. In this case, the temperature protection device needs to dissipate heat from both areas simultaneously. Based on the first temperature difference (the difference between the first temperature and the first safe temperature threshold) and the second temperature difference (the difference between the second temperature and the second safe temperature threshold), the device determines the operating speeds of the first and second cooling fans, respectively. The first cooling fan operates at a third speed, and the second cooling fan operates at a fourth speed. Generally, the larger the first and second temperature differences, the higher the corresponding cooling fan speed, thereby enhancing the heat dissipation effect in both areas and ensuring that the power bank operates within a safe temperature range, as described in steps 401 to 404.

[0028] This invention employs two temperature sensors to detect the temperature of two areas within the power bank: one densely populated with battery cells and the other with concentrated circuit components, each exhibiting different heat-generating characteristics. This enables precise temperature monitoring of different heat-generating areas. Simultaneously, dual cooling fans are incorporated, allowing for the adjustment of their operating states and speeds based on a comparison of the temperature data for each area with safe temperature thresholds. This ensures precise temperature control across different areas. Furthermore, regardless of whether only one area exceeds the temperature limit or both areas do, the speed of the dual cooling fans can be accurately controlled, ensuring that both high-temperature areas receive adequate heat dissipation and that their temperatures remain within safe thresholds. This overcomes the shortcomings of inaccurately adjusting heat dissipation in different areas and the potential for insufficient or excessive heat dissipation in some areas, ensuring that the power bank remains within a safe temperature range during use.

[0029] In one embodiment, steps 201 to 204 include: Step 201: Calculate the difference between the first temperature and the second temperature to obtain the first gap temperature difference, and calculate the difference between the first temperature difference and the first gap temperature difference to obtain the target temperature matching difference.

[0030] Optionally, the temperature protection device first calculates the difference between the first temperature and the second temperature to obtain the first gap temperature difference, which reflects the temperature difference between the densely populated area of ​​the battery cells and the concentrated area of ​​circuit components. Subsequently, the temperature protection device subtracts the first gap temperature difference from the first temperature difference (the difference between the first temperature and the first safe temperature threshold) to obtain the target temperature matching difference. This target temperature matching difference comprehensively considers the overheating degree of the battery cell area and the temperature difference between the two areas.

[0031] In one embodiment, the first temperature is 43°C, the second temperature is 33°C, the first safe temperature threshold is 40°C, and the first temperature difference is 3°C. First, the temperature protection device calculates the first gap temperature difference, which is the difference between the first and second temperatures: 43°C - 33°C = 10°C. Then, it calculates the target temperature matching difference, which is the difference between the first temperature difference and the first gap temperature difference: 3°C - 10°C = -7°C.

[0032] Step 202: Calculate the ratio between the target temperature matching difference and the maximum heat dissipation temperature difference of the first cooling fan to obtain the heat dissipation demand intensity coefficient. The heat dissipation demand intensity coefficient represents the heat dissipation capacity intensity required to achieve the target temperature matching.

[0033] Furthermore, the temperature protection device calculates the ratio between the target temperature matching difference obtained in step 201 and the maximum heat dissipation temperature difference of the first cooling fan. The result is the heat dissipation demand intensity coefficient. The maximum heat dissipation temperature difference of the first cooling fan is the maximum temperature reduction it can achieve at its maximum speed. The magnitude of the heat dissipation demand intensity coefficient directly reflects the heat dissipation capacity required to achieve the target temperature matching. The larger the coefficient, the higher the required heat dissipation intensity.

[0034] Continuing with the above embodiment, the maximum temperature difference for the first cooling fan is 20℃. Combining the target temperature matching difference of -7℃ obtained in step 201, the heat dissipation demand intensity coefficient is calculated as: -7℃ ÷ 20℃ = -0.35.

[0035] Step 203: Calculate the first speed adjustment increment value by multiplying the heat dissipation demand intensity coefficient and the maximum speed increment of the first cooling fan.

[0036] Furthermore, the temperature protection device multiplies the heat dissipation demand intensity coefficient obtained in step 202 by the maximum speed increment of the first cooling fan, and the result is the first speed adjustment increment value. The maximum speed increment of the first cooling fan is the amount of speed change from the minimum starting speed to the maximum speed, and the first speed adjustment increment value determines the speed value that needs to be increased or decreased based on the minimum starting speed.

[0037] In one embodiment, the maximum speed increment of the first cooling fan is 3000 rpm. Based on the heat dissipation demand intensity coefficient of -0.35 obtained in step 202, the temperature protection device calculates the first speed adjustment increment value: -0.35 × 3000 rpm = -1050 rpm.

[0038] Step 204: Determine the first speed of the first cooling fan based on the first speed adjustment increment value and the minimum starting speed of the first cooling fan.

[0039] Furthermore, the temperature protection device determines the first speed of the first cooling fan based on the first speed adjustment increment value and the minimum starting speed of the first cooling fan, as described in steps 2041 to 2044.

[0040] The embodiments of the present invention take into account the overheating degree of the densely packed battery cell area, the temperature difference between the densely packed battery cell area and the concentrated circuit component area, the maximum heat dissipation capacity of the cooling fan, and the speed adjustment range, and accurately calculate the appropriate speed of the first cooling fan. This allows the first cooling fan to effectively dissipate heat from the densely packed battery cell area while also maintaining the temperature balance between the two areas, avoiding power bank failures due to excessive or insufficient heat dissipation, ensuring the safe and stable operation of the power bank during charging, and extending its service life.

[0041] In one embodiment, steps 2041 to 2044 include: Step 2041: Determine the first temperature difference change rate based on the first gap temperature difference and the first temperature adjustment time interval, and determine the heat dissipation requirement level of the first cooling fan based on the first temperature difference change rate.

[0042] Optionally, the temperature protection device calculates the rate of change of the first gap temperature difference within the first temperature adjustment time interval, i.e., the first temperature difference change rate. The first gap temperature difference is the difference between the first temperature and the second temperature, and the first temperature adjustment time interval is a fixed detection cycle set by the temperature protection device. Through the first temperature difference change rate, the temperature protection device can determine the trend of temperature difference changes between the densely populated areas of battery cells and the concentrated areas of circuit components, thereby determining the heat dissipation requirement level of the first cooling fan. Heat dissipation requirement levels are typically divided into multiple levels, such as low, medium, and high. The larger the change rate, the more drastic the temperature difference change, and the higher the corresponding heat dissipation requirement level.

[0043] Continuing with the above embodiment, the first gap temperature difference is 10℃ (43℃-33℃), and the first temperature adjustment time interval is set to 10 seconds. Assuming that after 10 seconds, the temperature protection device detects a new first gap temperature difference of 12℃, then the first temperature difference change rate is (12℃-10℃) ÷ 10 seconds = 0.2℃ / second. The preset judgment criteria of the temperature protection device are: when the first temperature difference change rate < 0.1℃ / second, the heat dissipation demand level is low; when 0.1℃ / second < first temperature difference change rate < 0.3℃ / second, the heat dissipation demand level is medium; when the first temperature difference change rate > 0.3℃ / second, the heat dissipation demand level is high. Therefore, the heat dissipation demand level at this time is medium.

[0044] Step 2042: Based on the heat dissipation requirement level and the speed increment corresponding to each heat dissipation requirement level, determine the second speed adjustment increment value of the first cooling fan.

[0045] Furthermore, the temperature protection device calculates the second speed adjustment increment value of the first cooling fan based on the heat dissipation requirement level determined in step 2041 and the preset speed increment corresponding to each heat dissipation requirement level. The speed increment corresponding to each heat dissipation requirement level is a preset fixed value. Different heat dissipation requirement levels correspond to different speed increments, and the higher the heat dissipation requirement level, the larger the corresponding speed increment.

[0046] In one embodiment, the preset speed increments corresponding to each level of heat dissipation demand are: 500 rpm for low level, 1000 rpm for medium level, and 1500 rpm for high level. Since the heat dissipation demand level determined in step 2041 is medium, the second speed adjustment increment is 1000 rpm.

[0047] Step 2043: If the first speed adjustment increment is greater than or equal to the second speed adjustment increment, then the first speed adjustment increment and the minimum starting speed are summed to obtain the first speed of the first cooling fan. Alternatively, Furthermore, the temperature protection device compares the first speed adjustment increment value obtained in step 203 with the second speed adjustment increment value obtained in step 2042. If the first speed adjustment increment value is greater than or equal to the second speed adjustment increment value, it means that the first speed adjustment increment value can meet the heat dissipation requirements corresponding to the current heat dissipation demand level. At this time, the temperature protection device will add the first speed adjustment increment value to the minimum starting speed of the first cooling fan to obtain the first speed of the first cooling fan.

[0048] In one embodiment, the first speed adjustment increment is 1200 rpm, the second speed adjustment increment is 1000 rpm, and the minimum starting speed of the first cooling fan is 1500 rpm. Since 1200 rpm > 1000 rpm, the condition of step 2043 is met, therefore the first speed is 1200 rpm + 1500 rpm = 2700 rpm.

[0049] Step 2044: If the first speed adjustment increment is less than the second speed adjustment increment, the second speed adjustment increment and the minimum starting speed are summed to obtain the first speed of the first cooling fan.

[0050] Furthermore, when the temperature protection device finds that the first speed adjustment increment is less than the second speed adjustment increment, it indicates that the first speed adjustment increment cannot meet the heat dissipation requirements corresponding to the current heat dissipation demand level. At this time, the second speed adjustment increment needs to be used as a benchmark and added to the minimum starting speed of the first cooling fan. The result is the first speed of the first cooling fan, so as to ensure that the heat dissipation effect can meet the requirements of the current heat dissipation demand level.

[0051] Continuing with the above embodiment, the first speed adjustment increment is -1050 rpm, the second speed adjustment increment is 1000 rpm, and the minimum starting speed of the first cooling fan is 1500 rpm. Since -1050 rpm < 1000 rpm, the condition of step 2044 is met, therefore the first speed is 1000 rpm + 1500 rpm = 2500 rpm.

[0052] This invention uses the rate of change of temperature difference to determine the urgency and trend of heat dissipation demand, identifies the corresponding heat dissipation demand level, and then verifies and corrects the speed adjustment increment value based on the speed increment corresponding to that level. This ensures that the first speed of the first cooling fan can take into account both the basic heat dissipation demand caused by the temperature difference and respond to the dynamic trend of temperature change. It ensures that the heat dissipation capacity can keep up in time when the temperature difference changes rapidly, avoiding the continuous rise in temperature due to untimely heat dissipation. It also prevents overheating when the heat dissipation demand is low, thereby controlling the operation of the cooling fan more precisely, ensuring that the temperature of the power bank is within a safe range during the charging process, and improving the reliability and flexibility of temperature protection.

[0053] In one embodiment, steps 301 to 304 include: Step 301: Calculate the difference between the first temperature and the second temperature to obtain the second gap temperature difference; calculate the ratio between the second temperature difference and the second gap temperature difference to obtain the excess temperature ratio coefficient.

[0054] Optionally, the temperature protection device first calculates the difference between the first temperature and the second temperature to obtain the second gap temperature difference, which reflects the temperature difference between the densely populated area of ​​battery cells and the concentrated area of ​​circuit components. Then, the temperature protection device divides the second temperature difference (the difference between the second temperature and the second safe temperature threshold) by the second gap temperature difference to obtain the excess temperature proportion coefficient. This coefficient reflects the proportion of the portion of the concentrated area of ​​circuit components exceeding the safe temperature in the temperature difference between the two areas, and can reflect the severity of the overheating in the circuit component area relative to the temperature difference between the two areas.

[0055] In one embodiment, the first temperature is 38°C, the second temperature is 38°C, the second safe temperature threshold is 35°C, and the second temperature difference is 3°C. First, the temperature protection device calculates the second gap temperature difference, which is the difference between the first and second temperatures: 38°C - 38°C = 0°C. Since the second gap temperature difference is 0°C, to avoid meaningless calculations, the excess temperature ratio coefficient is set to 1 (special processing rule). In another scenario, if the first temperature is 36°C, the second temperature is 39°C, the second temperature difference is 4°C, and the second gap temperature difference is 36°C - 39°C = -3°C (taking the absolute value as 3°C), then the excess temperature ratio coefficient is 4°C ÷ 3°C ≈ 1.33.

[0056] Step 302: Calculate the difference between the maximum rated speed and the minimum starting speed of the second cooling fan to obtain the speed difference value. Multiply the speed difference value by the excess temperature ratio coefficient to obtain the over-temperature regulation speed.

[0057] Furthermore, the temperature protection device first calculates the difference between the maximum rated speed and the minimum starting speed of the second cooling fan to obtain the speed difference, which represents the adjustable speed range of the second cooling fan.

[0058] Furthermore, the temperature protection device multiplies the speed difference by the excess temperature ratio coefficient obtained in step 301, and the result is the over-temperature adjustment speed. The over-temperature adjustment speed reflects the additional speed adjustment required based on the over-temperature situation of the circuit component area and the temperature difference ratio between the two areas.

[0059] Continuing with the above embodiment, the maximum rated speed of the second cooling fan is 4000 rpm, and the minimum starting speed is 1000 rpm. Therefore, the speed difference is 4000 rpm - 1000 rpm = 3000 rpm. Combining the excess temperature ratio coefficient of 1 in the first case of step 301, the temperature protection device calculates the over-temperature adjustment speed: 3000 rpm × 1 = 3000 rpm. In another case, if the excess temperature ratio coefficient is 1.33, then the over-temperature adjustment speed is 3000 rpm × 1.33 ≈ 3990 rpm (since the over-temperature adjustment speed cannot exceed the speed difference, 3000 rpm is used here).

[0060] Step 303: The base speed of the second cooling fan is obtained by summing the over-temperature regulation speed and the minimum start-up speed.

[0061] Furthermore, the temperature protection device adds the over-temperature adjustment speed obtained in step 302 to the minimum starting speed of the second cooling fan, and the result is the reference speed of the second cooling fan. The reference speed is a basic speed determined based on the over-temperature condition and the speed adjustment range.

[0062] Continuing with the first scenario in steps 301 and 302, the over-temperature regulation speed is 3000 rpm, and the minimum starting speed is 1000 rpm. The temperature protection device calculates the base speed as: 3000 rpm + 1000 rpm = 4000 rpm. In the other scenario, the over-temperature regulation speed is 3000 rpm, and the minimum starting speed is 1000 rpm, so the base speed is also 4000 rpm.

[0063] Step 304: Determine the second rotational speed of the second cooling fan based on the second notch temperature difference and the reference rotational speed.

[0064] Furthermore, the temperature protection device determines the second rotation speed of the second cooling fan based on the second gap temperature difference and the reference rotation speed, as described in steps 3041 to 3043.

[0065] This invention comprehensively considers the overheating level of the concentrated circuit component area, the temperature difference between the dense battery cell area and the concentrated circuit component area, and the speed adjustment range of the cooling fan to determine the second speed of the second cooling fan. This ensures that sufficient heat dissipation capacity is provided according to the overheating situation of the circuit component area, while also taking into account the temperature balance of the two areas. It avoids the problems of overheating or underheating that may be caused by adjusting the speed solely based on the overheating value. This allows the second cooling fan to dissipate heat more accurately in the concentrated circuit component area, ensuring that the temperature of the circuit component area of ​​the power bank is within a safe range during charging, and improving the accuracy and reliability of the power bank's temperature control.

[0066] In one embodiment, steps 3041 to 3043 include: Step 3041: Determine the second temperature difference change rate based on the second gap temperature difference and the second temperature adjustment time interval.

[0067] Optionally, the temperature protection device calculates the rate of change of the second gap temperature difference within the second temperature adjustment time interval, obtaining the second temperature difference change rate. The second gap temperature difference is the difference between the first temperature and the second temperature, and the second temperature adjustment time interval is a fixed detection cycle set by the temperature protection device. The second temperature difference change rate reflects the rate of change of the temperature difference between the densely populated area of ​​battery cells and the concentrated area of ​​circuit components. A positive change rate indicates that the temperature difference between the two areas is increasing; a negative change rate indicates that the temperature difference is decreasing. Through the second temperature difference change rate, the temperature protection device can determine the dynamic trend of the temperature difference between the two areas.

[0068] Continuing with the above embodiment, the initial second gap temperature difference is 0℃ (38℃-38℃), and the second temperature adjustment time interval is set to 15 seconds. After 15 seconds, the temperature protection device detects a new first temperature of 38℃ and a new second temperature of 39℃, resulting in a new second gap temperature difference of 38℃-39℃=-1℃. Therefore, the rate of change of the second temperature difference is (-1℃-0℃)÷15 seconds≈-0.067℃ / second. This value indicates that the temperature difference between the two regions is decreasing at a rate of 0.067℃ / second (the temperature in the circuit component area rises relatively faster).

[0069] Step 3042: The product of the heat capacity of the concentrated area of ​​the circuit components and the second temperature difference change rate is used to calculate the ratio of the product of the heat dissipation power per unit speed of the fan and the heat dissipation efficiency of the fan to obtain the speed correction coefficient.

[0070] Furthermore, the temperature protection device first calculates the product of the heat capacity of the concentrated area of ​​circuit components and the second rate of temperature change. This product reflects the heat change of the concentrated area of ​​circuit components relative to the dense area of ​​battery cells per unit time. Next, it calculates the product of the cooling power per unit speed of the fan and the fan's cooling efficiency. This product represents the effective cooling power that the second cooling fan can achieve per unit speed. Finally, the ratio of the first product to the second product is calculated to obtain the speed correction coefficient. The speed correction coefficient is used to adjust the reference speed so that the fan speed matches the real-time heat change requirements of the circuit component area.

[0071] Continuing with the above embodiment, the heat capacity of the concentrated area of ​​circuit components is 50 J / ℃, the second temperature difference change rate is -0.067℃ / second, the heat dissipation power per unit speed of the fan is 0.2 W / (rpm), and the fan cooling efficiency is 0.8. First, calculate the product of the heat capacity of the concentrated area of ​​circuit components and the second temperature difference change rate: 50 J / ℃ × (-0.067℃ / second) ≈ -3.35 J / second (i.e., -3.35 W). Then calculate the product of the heat dissipation power per unit speed of the fan and the fan cooling efficiency: 0.2 W / (rpm) × 0.8 = 0.16 W / (rpm). Finally, calculate the speed correction factor: (-3.35 W) ÷ 0.16 W / (rpm) ≈ -20.94 (rpm) / W. Taking the absolute value, the correction factor is 20.94 (in actual applications, normalization is performed; here it is corrected to 1.1).

[0072] Step 3043: Determine the initial adjustment speed by multiplying the reference speed and the speed correction coefficient.

[0073] Furthermore, the temperature protection device multiplies the reference speed by the speed correction coefficient to obtain the initial adjustment speed. The initial adjustment speed is a speed corrected based on the reference speed, taking into account the temperature difference trend and heat dissipation capacity of the two regions. This allows for a more accurate matching of the real-time heat dissipation needs of areas with concentrated circuit components, making the heat dissipation effect more consistent with actual temperature changes.

[0074] Continuing with the above embodiment, the reference speed obtained in step 303 is 4000 rpm, and the speed correction coefficient obtained in step 3042 is 1.1. The temperature protection device calculates the initial adjustment speed: 4000 rpm × 1.1 = 4400 rpm. Since the maximum rated speed of the second cooling fan is 4000 rpm, the final initial adjustment speed is limited to 4000 rpm (not exceeding the maximum rated speed).

[0075] This invention captures the dynamic changes in temperature difference between the battery cell and the circuit component area through a second temperature difference change rate. It calculates the speed correction coefficient by combining parameters such as the heat capacity of the circuit component area and the fan heat dissipation characteristics, and accurately adjusts the reference speed. This ensures that the final determined second cooling fan speed not only meets the current heat dissipation requirements but also adapts to the trend of temperature changes, proactively addressing potential overheating or avoiding unnecessary excessive heat dissipation. This improves the timeliness and accuracy of heat dissipation control in concentrated areas of circuit components, further ensuring the temperature stability and safety of the power bank during charging.

[0076] In one embodiment, steps 401 to 404 include: Step 401: The first heat dissipation capacity coefficient is obtained by multiplying the air thermal conductivity and the first heat dissipation area of ​​the densely packed battery cell region and then comparing the product with the first air duct length of the first cooling fan.

[0077] Optionally, the temperature protection device will first calculate the product of the air thermal conductivity and the first heat dissipation area of ​​the densely packed battery cell region, reflecting the amount of heat that can be transferred through the heat dissipation surface of the densely packed battery cell region per unit time. The air thermal conductivity is a physical parameter that measures the ability of air to conduct heat, and the first heat dissipation area is the effective surface area of ​​the densely packed battery cell region used for heat dissipation.

[0078] Furthermore, the temperature protection device calculates the ratio of this product to the length of the first air duct of the first cooling fan to obtain the first heat dissipation capacity coefficient. The length of the first air duct is the path length of the airflow blown by the first cooling fan to reach the densely packed area of ​​the battery cells. The first heat dissipation capacity coefficient reflects the strength of the first cooling fan's heat dissipation capacity for the densely packed area of ​​the battery cells; the larger the coefficient, the stronger the heat dissipation capacity.

[0079] In one embodiment, the thermal conductivity of air is 0.026 W / (m·K), the first heat dissipation area of ​​the densely packed battery cell region is 0.01 m², and the first air duct length of the first cooling fan is 0.1 m. The temperature protection device first calculates the product of the air thermal conductivity and the first heat dissipation area: 0.026 W / (m·K) × 0.01 m² = 0.00026 W / K. Then, it calculates the first heat dissipation capacity coefficient by dividing this product by the length of the first air duct: 0.00026 W / K ÷ 0.1 m = 0.0026 W / (m·K).

[0080] Step 402: The product of the air thermal conductivity and the second heat dissipation area of ​​the concentrated area of ​​circuit components is multiplied and then compared with the second air duct length of the second cooling fan to obtain the second heat dissipation capacity coefficient.

[0081] Furthermore, the temperature protection device first calculates the product of the air thermal conductivity and the second heat dissipation area of ​​the concentrated area of ​​circuit components. This product reflects the amount of heat that can be transferred through the heat dissipation surface of the concentrated area of ​​circuit components per unit time. The second heat dissipation area is the effective surface area of ​​the concentrated area of ​​circuit components used for heat dissipation.

[0082] Furthermore, the temperature protection device calculates the ratio of this product to the length of the second air duct of the second cooling fan to obtain the second heat dissipation capacity coefficient. The length of the second air duct is the path length of the airflow blown by the second cooling fan to reach the area where circuit components are concentrated. The second heat dissipation capacity coefficient reflects the strength of the second cooling fan's heat dissipation capacity for the area where circuit components are concentrated; the larger the coefficient, the stronger the heat dissipation capacity.

[0083] In one embodiment, the air thermal conductivity remains 0.026 W / (m·K), the second heat dissipation area of ​​the concentrated circuit component region is 0.005 m², and the second air duct length of the second cooling fan is 0.08 m. The temperature protection device first calculates the product of the air thermal conductivity and the second heat dissipation area: 0.026 W / (m·K) × 0.005 m² = 0.00013 W / K. Then, it calculates the second heat dissipation capacity coefficient by dividing this product by the length of the second air duct: 0.00013 W / K ÷ 0.08 m = 0.001625 W / (m·K).

[0084] Step 403: Based on the first temperature difference, the first theoretical rotational speed is obtained by comparing it with the product of the first heat dissipation capacity coefficient and the target heat dissipation time; and based on the second temperature difference, the second theoretical rotational speed is obtained by comparing it with the product of the second heat dissipation capacity coefficient and the target heat dissipation time.

[0085] Furthermore, the temperature protection device calculates the first theoretical rotational speed by ratioing the first temperature difference (the difference between the first temperature and the first safe temperature threshold) to the product of the first heat dissipation capacity coefficient and the target heat dissipation time. The target heat dissipation time is the time preset by the temperature protection device to reduce the temperature of the densely packed cell area to the safe temperature threshold.

[0086] The second theoretical speed is calculated by dividing the second temperature difference (the difference between the second temperature and the second safe temperature threshold) by the product of the second heat dissipation capacity coefficient and the target heat dissipation time. The first and second theoretical speeds are theoretically calculated fan speeds required to reduce the temperature of the corresponding area to a safe range within the target heat dissipation time.

[0087] Continuing with the above embodiment, the first temperature difference is 5°C, the second temperature difference is 4°C, and the target heat dissipation time is set to 60 seconds. For the first theoretical rotational speed: the temperature protection device first calculates the product of the first heat dissipation capacity coefficient and the target heat dissipation time: 0.0026W / (m·K) × 60s = 0.156W·s / (m·K). Then, the first temperature difference is used to calculate the ratio of this product, yielding the first theoretical rotational speed: 5K ÷ 0.156W·s / (m·K) ≈ 32.05 (m·K) / (W·s) (in practical applications, this will be converted to rotational speed units; here, it is assumed to be 3500 rpm). For the second theoretical rotational speed: first, the product of the second heat dissipation capacity coefficient and the target heat dissipation time is calculated: 0.001625W / (m·K) × 60s = 0.0975W·s / (m·K). Then, the ratio of the second temperature difference to this product is used to calculate the second theoretical rotational speed: 4K÷0.0975W・s / (m・K)≈41.03(m・K) / (W・s) (which is converted to 3800 rpm).

[0088] Step 404: Based on the first theoretical speed, the second theoretical speed, the first maximum speed of the first cooling fan, and the second maximum speed of the second cooling fan, determine the third speed of the first cooling fan and the fourth speed of the second cooling fan.

[0089] Furthermore, the temperature protection device determines the third speed of the first cooling fan and the fourth speed of the second cooling fan based on the first theoretical speed, the second theoretical speed, the first maximum speed of the first cooling fan, and the second maximum speed of the second cooling fan, as described in steps 4041 to 4043.

[0090] This invention takes into account physical factors affecting heat dissipation, such as air thermal conduction characteristics, heat dissipation area, and air duct length, as well as target heat dissipation time and maximum fan speed limits, to determine reasonable speeds for the first and second cooling fans. This allows the two fans to provide matching heat dissipation capabilities based on the degree of overheating and heat dissipation conditions of their respective areas when both the densely packed battery cell area and the concentrated circuit component area are overheated. This not only reduces the temperature of both areas to a safe range in the shortest possible time but also prevents the fans from being damaged due to overspeed operation. As a result, effective control of the overall temperature of the power bank is achieved, ensuring the safe and stable operation of the power bank under dual overheating conditions.

[0091] In one embodiment, steps 4041 to 4043 include: Step 4041: If the first theoretical speed is greater than the first maximum speed, and the second theoretical speed is less than or equal to the second maximum speed, then the first maximum speed is determined as the third speed, and the first product of the second theoretical speed and the first cooling fan speed, and the second product of the first theoretical speed and the second cooling fan speed are calculated. The fourth speed is obtained by multiplying the ratio of the first product and the second product with the first maximum speed.

[0092] Optionally, when the temperature protection device detects that the first theoretical speed is greater than the first maximum speed and the second theoretical speed is less than or equal to the second maximum speed, it indicates that the first cooling fan cannot reach the theoretically required speed, while the second cooling fan still has adjustment range. In this case, the temperature protection device directly determines the first maximum speed as the third speed of the first cooling fan. Next, the temperature protection device calculates the first product of the second theoretical speed and the first cooling fan (i.e., the second theoretical speed multiplied by the first heat dissipation coefficient), and the second product of the first theoretical speed and the second cooling fan (i.e., the first theoretical speed multiplied by the second heat dissipation coefficient), where the first heat dissipation coefficient and the second heat dissipation coefficient are preset parameters related to the heat dissipation efficiency of the two fans, respectively.

[0093] Furthermore, the temperature protection device calculates the ratio of the first product to the second product and multiplies this ratio by the first maximum speed to obtain the fourth speed of the second cooling fan. Therefore, after the first cooling fan reaches its maximum speed, the device can adjust the speed of the second cooling fan to compensate for the overall insufficient heat dissipation capacity and achieve heat dissipation balance between the two areas.

[0094] In one embodiment, the first theoretical speed is 3500 rpm, the first maximum speed is 3200 rpm, the second theoretical speed is 3800 rpm, the second maximum speed is 4000 rpm, the first heat dissipation coefficient is 0.8, and the second heat dissipation coefficient is 0.7. Since the first theoretical speed of 3500 rpm is greater than the first maximum speed of 3200 rpm, and the second theoretical speed of 3800 rpm is less than the second maximum speed of 4000 rpm, the condition of step 4041 is satisfied. The temperature protection device determines the first maximum speed of 3200 rpm as the third speed. Then, the first product of the second theoretical speed and the first heat dissipation coefficient is calculated: 3800 rpm × 0.8 = 3040; the second product of the first theoretical speed and the second heat dissipation coefficient is calculated: 3500 rpm × 0.7 = 2450. Then, the ratio of the first product to the second product is calculated: 3040 ÷ 2450 ≈ 1.24. Finally, the fourth rotational speed is calculated as: 1.24 × 3200 rpm ≈ 3968 rpm.

[0095] Step 4042: If the second theoretical speed is greater than the second maximum speed, and the first theoretical speed is less than or equal to the first maximum speed, then the second maximum speed is determined as the fourth speed. The third speed is obtained by multiplying the ratio of the second product and the first product with the second maximum speed.

[0096] Furthermore, when the temperature protection device detects that the second theoretical speed is greater than the second maximum speed and the first theoretical speed is less than or equal to the first maximum speed, it indicates that the second cooling fan has reached its maximum capacity limit, while the first cooling fan still has room for adjustment. The second maximum speed is then determined as the fourth speed of the second cooling fan.

[0097] Furthermore, the temperature protection device calculates the third speed of the first cooling fan by multiplying the second product (first theoretical speed multiplied by second heat dissipation coefficient) and the first product (second theoretical speed multiplied by first heat dissipation coefficient) with the second maximum speed. Therefore, when the second cooling fan is running at full load, the speed of the first cooling fan can be increased to make up for the gap in heat dissipation capacity and ensure that the heat dissipation effect of the two areas is coordinated.

[0098] In one embodiment, the first theoretical speed is 3000 rpm, the first maximum speed is 3200 rpm, the second theoretical speed is 4200 rpm, the second maximum speed is 4000 rpm, the first heat dissipation coefficient is 0.8, and the second heat dissipation coefficient is 0.7. Since the second theoretical speed of 4200 rpm is greater than the second maximum speed of 4000 rpm, and the first theoretical speed of 3000 rpm is less than the first maximum speed of 3200 rpm, the condition of step 4042 is met. The temperature protection device determines the second maximum speed of 4000 rpm as the fourth speed. Calculate the second product: 3000 rpm × 0.7 = 2100; calculate the first product: 4200 rpm × 0.8 = 3360. Calculate the ratio of the second product to the first product: 2100 ÷ 3360 = 0.625. Finally, calculate the third speed: 0.625 × 4000 rpm = 2500 rpm.

[0099] Step 4043: If the first theoretical speed is greater than the first maximum speed and the second theoretical speed is greater than the second maximum speed, then the first maximum speed is determined as the third speed and the second maximum speed is determined as the fourth speed.

[0100] Furthermore, when the temperature protection device detects that the first theoretical speed is greater than the first maximum speed, and the second theoretical speed is greater than the second maximum speed, it indicates that the theoretically required speeds of both cooling fans have exceeded their respective maximum speeds. At this point, neither fan can meet the theoretical heat dissipation requirements. To ensure safe fan operation and provide the maximum possible heat dissipation capacity, the temperature protection device directly sets the first maximum speed as the third speed of the first cooling fan, and simultaneously sets the second maximum speed as the fourth speed of the second cooling fan, ensuring that both fans operate at maximum capacity to minimize the temperature in both areas.

[0101] In one embodiment, the first theoretical speed is 3500 rpm, the first maximum speed is 3200 rpm, the second theoretical speed is 4200 rpm, and the second maximum speed is 4000 rpm. Since the first theoretical speed of 3500 rpm is greater than the first maximum speed of 3200 rpm, and the second theoretical speed of 4200 rpm is greater than the second maximum speed of 4000 rpm, the condition of step 4043 is satisfied. The temperature protection device determines the first maximum speed of 3200 rpm as the third speed and the second maximum speed of 4000 rpm as the fourth speed, controlling the two fans to operate at their respective maximum speeds.

[0102] In this embodiment of the invention, when one fan reaches its maximum speed, the speed of the other fan is adjusted to compensate for the heat dissipation capacity; when both fans reach their maximum speed, they operate at their maximum capacity, ensuring that the fans operate within a safe speed range while maximizing the overall efficiency of the heat dissipation system. This allows for the most effective heat dissipation in areas with dense battery cells and concentrated circuit components under dual overheating conditions, avoiding continuous local temperature increases due to insufficient capacity of a single fan, and further improving the reliability of temperature control and safety of the power bank under extreme conditions.

[0103] Furthermore, the temperature protection device for mobile power banks in the charging state provided by the present invention will be described below. The temperature protection device for mobile power banks in the charging state described below can be referred to in correspondence with the temperature protection method for mobile power banks in the charging state described above.

[0104] Reference Figure 2 , Figure 2 This is a schematic diagram of the temperature protection device for a mobile power bank during charging, provided by the present invention. The temperature protection device for a mobile power bank during charging includes: Temperature sensing module 210 is used to activate the first temperature sensor and the second temperature sensor respectively to detect the first temperature of the densely packed area of ​​battery cells and the second temperature of the concentrated area of ​​circuit components when the mobile power bank is charging. The first heat dissipation control module 220 is used to control the first cooling fan to run at a first speed based on the second temperature and the first temperature difference between the first temperature and the first safe temperature threshold if the first temperature is greater than the first safe temperature threshold and the second temperature is less than or equal to the second safe temperature threshold. The second heat dissipation control module 230 is used to control the second cooling fan to run at a second speed based on the first temperature and the second temperature difference between the second temperature and the second safe temperature threshold if the first temperature is less than or equal to the first safe temperature threshold and the second temperature is greater than the second safe temperature threshold. The third heat dissipation control module 240 is used to control the first cooling fan and the second cooling fan to run at a third speed and a fourth speed respectively based on the first temperature difference and the second temperature difference if the first temperature is greater than the first safe temperature threshold and the second temperature is greater than the second safe temperature threshold.

[0105] This invention employs two temperature sensors to detect the temperature of two areas within the power bank: one densely populated with battery cells and the other with concentrated circuit components, each exhibiting different heat-generating characteristics. This enables precise temperature monitoring of different heat-generating areas. Simultaneously, dual cooling fans are incorporated, allowing for the adjustment of their operating states and speeds based on a comparison of the temperature data for each area with safe temperature thresholds. This ensures precise temperature control across different areas. Furthermore, regardless of whether only one area exceeds the temperature limit or both areas do, the speed of the dual cooling fans can be accurately controlled, ensuring that both high-temperature areas receive adequate heat dissipation and that their temperatures remain within safe thresholds. This overcomes the shortcomings of inaccurately adjusting heat dissipation in different areas and the potential for insufficient or excessive heat dissipation in some areas, ensuring that the power bank remains within a safe temperature range during use.

[0106] Please see Figure 3 , Figure 3 This is a schematic diagram illustrating an embodiment of the electronic device provided in this invention. For example... Figure 3 As shown, this embodiment of the invention provides an electronic device 300, including a memory 310, a processor 320, and a computer program 311 stored in the memory 310 and executable on the processor 320. When the processor 320 executes the computer program 311, it performs the following steps: When the mobile power bank is charging, the first temperature sensor and the second temperature sensor are activated to detect the first temperature of the densely packed battery cell area and the second temperature of the concentrated circuit component area, respectively. If the first temperature is greater than the first safe temperature threshold and the second temperature is less than or equal to the second safe temperature threshold, then based on the second temperature and the first temperature difference between the first temperature and the first safe temperature threshold, the first cooling fan is controlled to run at the first speed. If the first temperature is less than or equal to the first safe temperature threshold and the second temperature is greater than the second safe temperature threshold, then based on the first temperature and the second temperature difference between the second temperature and the second safe temperature threshold, the second cooling fan is controlled to run at the second speed. If the first temperature is greater than the first safe temperature threshold and the second temperature is greater than the second safe temperature threshold, then the first cooling fan and the second cooling fan are controlled to run at the third speed and the fourth speed respectively based on the first temperature difference and the second temperature difference.

[0107] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0108] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, apparatus, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0109] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (devices), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0110] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0111] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0112] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0113] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for temperature protection of a mobile power bank during charging, characterized in that, A first temperature sensor is installed in the densely packed area of ​​the battery cells in the mobile power bank, and a second temperature sensor is installed in the concentrated area of ​​the circuit components; a first cooling fan corresponding to the densely packed area of ​​the battery cells and a second cooling fan corresponding to the concentrated area of ​​the circuit components are provided on the casing of the mobile power bank; the temperature protection method includes: When the mobile power bank is charging, the first temperature sensor and the second temperature sensor are activated to detect the first temperature of the densely packed battery cell area and the second temperature of the concentrated circuit component area, respectively. If the first temperature is greater than the first safe temperature threshold and the second temperature is less than or equal to the second safe temperature threshold, then based on the second temperature and the first temperature difference between the first temperature and the first safe temperature threshold, the first cooling fan is controlled to run at the first speed. If the first temperature is less than or equal to the first safe temperature threshold and the second temperature is greater than the second safe temperature threshold, then based on the first temperature and the second temperature difference between the second temperature and the second safe temperature threshold, the second cooling fan is controlled to run at the second speed. If the first temperature is greater than the first safe temperature threshold and the second temperature is greater than the second safe temperature threshold, then the first cooling fan and the second cooling fan are controlled to run at the third speed and the fourth speed, respectively, based on the first temperature difference and the second temperature difference.

2. The temperature protection method for mobile power banks during charging as described in claim 1, characterized in that, The specific process of determining the first speed of the first cooling fan based on the second temperature and the first temperature difference between the first temperature and the first safe temperature threshold includes: The first gap temperature difference is obtained by taking the difference between the first temperature and the second temperature, and the target temperature matching difference is obtained by taking the difference between the first temperature difference and the first gap temperature difference. The heat dissipation demand intensity coefficient is obtained by calculating the ratio between the target temperature matching difference and the maximum heat dissipation temperature difference of the first cooling fan; the heat dissipation demand intensity coefficient represents the heat dissipation capacity intensity required to achieve the target temperature matching. The first speed adjustment increment value is obtained by multiplying the heat dissipation demand intensity coefficient and the maximum speed increment of the first cooling fan. The first speed of the first cooling fan is determined based on the first speed adjustment increment value and the minimum starting speed of the first cooling fan.

3. The temperature protection method for mobile power banks during charging as described in claim 2, characterized in that, Determining the first speed of the first cooling fan based on the first speed adjustment increment value and the minimum starting speed of the first cooling fan includes: The first temperature difference change rate is determined based on the first gap temperature difference and the first temperature adjustment time interval, and the heat dissipation requirement level of the first cooling fan is determined based on the first temperature difference change rate. Based on the heat dissipation requirement level and the speed increment corresponding to each heat dissipation requirement level, the second speed adjustment increment value of the first cooling fan is determined. If the first speed adjustment increment is greater than or equal to the second speed adjustment increment, then the first speed adjustment increment and the minimum starting speed are summed to obtain the first speed of the first cooling fan; or, If the first speed adjustment increment is less than the second speed adjustment increment, then the second speed adjustment increment and the minimum starting speed are summed to obtain the first speed of the first cooling fan.

4. The temperature protection method for mobile power banks during charging as described in claim 1, characterized in that, The specific process of determining the second speed of the second cooling fan based on the first temperature and the second temperature difference with the second safe temperature threshold includes: The second gap temperature difference is obtained by taking the difference between the first temperature and the second temperature, and the excess temperature ratio coefficient is obtained by taking the ratio between the second temperature difference and the second gap temperature difference. The speed difference is obtained by taking the difference between the maximum rated speed and the minimum starting speed of the second cooling fan, and the over-temperature regulation speed is obtained by multiplying the speed difference with the excess temperature ratio coefficient. The base speed of the second cooling fan is obtained by summing the over-temperature adjustment speed and the minimum starting speed. The second rotational speed of the second cooling fan is determined based on the second notch temperature difference and the reference rotational speed.

5. The temperature protection method for mobile power banks during charging as described in claim 4, characterized in that, Determining the second speed of the second cooling fan based on the second notch temperature difference and the reference speed includes: The second temperature difference change rate is determined based on the second gap temperature difference and the second temperature adjustment time interval; The speed correction coefficient is calculated by multiplying the heat capacity of the concentrated area of ​​circuit components with the second temperature difference change rate, and then comparing it with the product of the heat dissipation power per unit speed of the fan and the heat dissipation efficiency of the fan. The initial adjustment speed is determined by multiplying the reference speed and the speed correction coefficient.

6. The temperature protection method for mobile power banks during charging as described in claim 1, characterized in that, The specific process of determining the third speed of the first cooling fan and the fourth speed of the second cooling fan based on the first temperature difference and the second temperature difference includes: The first heat dissipation capacity coefficient is obtained by multiplying the air thermal conductivity and the first heat dissipation area of ​​the densely packed battery cell region and then comparing it with the first air duct length of the first cooling fan. The second heat dissipation capacity coefficient is obtained by multiplying the air thermal conductivity and the second heat dissipation area of ​​the concentrated area of ​​the circuit components and then comparing it with the second air duct length of the second cooling fan. Based on the first temperature difference, the first theoretical rotational speed is obtained by comparing it with the product of the first heat dissipation capacity coefficient and the target heat dissipation time. Based on the second temperature difference, the second theoretical rotational speed is obtained by comparing it with the product of the second heat dissipation capacity coefficient and the target heat dissipation time. Based on the first theoretical speed, the second theoretical speed, the first maximum speed of the first cooling fan, and the second maximum speed of the second cooling fan, the third speed of the first cooling fan and the fourth speed of the second cooling fan are determined.

7. The temperature protection method for mobile power banks during charging as described in claim 6, characterized in that, The step of determining the third speed of the first cooling fan and the fourth speed of the second cooling fan based on the first theoretical speed, the second theoretical speed, the first maximum speed of the first cooling fan, and the second maximum speed of the second cooling fan includes: If the first theoretical speed is greater than the first maximum speed and the second theoretical speed is less than or equal to the second maximum speed, then the first maximum speed is determined as the third speed, and the first product of the second theoretical speed and the first cooling fan, and the second product of the first theoretical speed and the second cooling fan are calculated; the fourth speed is obtained by multiplying the ratio of the first product and the second product with the first maximum speed. If the second theoretical speed is greater than the second maximum speed, and the first theoretical speed is less than or equal to the first maximum speed, then the second maximum speed is determined as the fourth speed; the third speed is obtained by multiplying the ratio of the second product and the first product with the second maximum speed. If the first theoretical speed is greater than the first maximum speed, and the second theoretical speed is greater than the second maximum speed, then the first maximum speed is determined as the third speed, and the second maximum speed is determined as the fourth speed.

8. A temperature protection device for a mobile power bank during charging, characterized in that, The method for temperature protection of a mobile power bank during charging, as described in any one of claims 1 to 7, includes: a first temperature sensor disposed in a densely packed area of ​​the battery cells and a second temperature sensor disposed in a concentrated area of ​​circuit components on the casing of the mobile power bank; a first cooling fan corresponding to the densely packed area of ​​the battery cells and a second cooling fan corresponding to the concentrated area of ​​circuit components are provided on the casing of the mobile power bank; the device comprises: The temperature sensing module is used to activate the first temperature sensor and the second temperature sensor to detect the first temperature of the densely packed battery cell area and the second temperature of the concentrated circuit component area when the mobile power bank is charging. The first heat dissipation control module is configured to control the first cooling fan to run at a first speed based on the second temperature and the first temperature difference between the first temperature and the first safe temperature threshold if the first temperature is greater than the first safe temperature threshold and the second temperature is less than or equal to the second safe temperature threshold. The second heat dissipation control module is used to control the second cooling fan to run at a second speed based on the first temperature and the second temperature difference between the second temperature and the second safe temperature threshold if the first temperature is less than or equal to the first safe temperature threshold and the second temperature is greater than the second safe temperature threshold. The third heat dissipation control module is used to control the first cooling fan and the second cooling fan to run at a third speed and a fourth speed respectively based on the first temperature difference and the second temperature difference if the first temperature is greater than the first safe temperature threshold and the second temperature is greater than the second safe temperature threshold.

9. An electronic device, characterized in that, The electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that the processor, when executing the program, implements the temperature protection method for mobile power banks in the charging state as described in any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium, wherein a computer software program is stored therein, characterized in that, When the processor executes the program, it implements the temperature protection method for mobile power banks in the charging state as described in any one of claims 1 to 7.

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