Battery pack air-cooling heat dissipation monitoring method and device, computer equipment and storage medium

Abstract

The invention provides a battery pack air cooling heat dissipation monitoring method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring cell operation state parameters of a battery pack; performing operation adjustment processing on the battery cell operation state parameter and a preset operation state parameter to obtain a battery cell operation adjustment; and sending a fan power adjusting signal to a battery cell air cooling control system according to the battery cell operation adjustment so as to adjust the rotating speed of a fan for carrying out air cooling heat dissipation on the battery pack. After the cell operation state parameters are collected, the current working mode of the battery pack is determined, then the cell operation state parameters are compared with the standard cell operation state parameters, the difference between the current working mode of the battery pack and the specified working mode is conveniently determined, and finally the battery pack is determined according to the difference value. The air cooling mode of the battery pack is adjusted, the heat dissipation mode of the battery pack can be optimized conveniently, the battery cooling effect is kept optimal, the cooling efficiency is effectively improved, and meanwhile energy waste can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery packs, and particularly to a battery pack air-cooling heat dissipation monitoring method, device, computer device, and storage medium. Background Art

[0002] With the increasing global demand for environmental protection and renewable energy, electric vehicles and energy storage systems are being applied more and more widely. As the core component of electric vehicles and energy storage systems, the performance and lifespan of the battery pack directly affect the efficiency and reliability of the entire system. During operation, the battery pack generates a large amount of heat. If effective heat dissipation cannot be achieved, it will lead to a decline in battery performance, a shortening of lifespan, and even potential safety hazards. Traditional battery pack cooling methods mainly include air cooling, liquid cooling, and phase change material cooling, etc. Among them, air cooling has become one of the most commonly used cooling methods due to its simple structure, low cost, and convenient maintenance.

[0003] However, traditional air-cooling designs usually rely on fixed fan speeds and wind directions and cannot adapt to the thermal load changes of the battery pack under different operating conditions. For example, under high-load operating conditions, the heat generated by the battery pack increases significantly, and the fixed fan speed may not provide sufficient cooling effect; while under low-load operating conditions, too high a fan speed will result in energy waste. Summary of the Invention

[0004] The purpose of the present disclosure is to overcome the deficiencies in the prior art and provide a battery pack air-cooling heat dissipation monitoring method, device, computer device, and storage medium that can effectively improve the cooling efficiency and reduce energy waste.

[0005] The purpose of the present disclosure is achieved through the following technical solutions: A battery pack air-cooling heat dissipation monitoring method, the method comprising: Obtaining the operating state parameters of the battery cells of the battery pack; Performing running adjustment processing on the operating state parameters of the battery cells and preset operating state parameters to obtain the running adjustment of the battery cells; Sending a fan power adjustment signal to the battery cell air-cooling control system according to the running adjustment of the battery cells to adjust the fan speed for air-cooling heat dissipation of the battery pack.

[0006] In one embodiment, the obtaining the operating state parameters of the battery cells of the battery pack includes: obtaining the median value of the operating current of the battery cells of the battery pack.

[0007] In one embodiment, the performing running adjustment processing on the operating state parameters of the battery cells and preset operating state parameters to obtain the running adjustment of the battery cells includes: obtaining the adjustment of the average temperature of the battery cells by calculating the difference between the median value of the operating current of the battery cells and the preset average temperature to obtain the average temperature adjustment of the battery cells.

[0008] In one embodiment, sending a fan power adjustment signal to the cell air-cooling control system according to the cell operation deviation to adjust the rotational speed of the fan for air-cooling the battery pack includes: detecting whether the average temperature deviation of the cells is greater than a preset average temperature deviation; when the average temperature deviation of the cells is greater than the preset average temperature deviation, sending a full-power signal of the fan to the cell air-cooling control system to maximize the rotational speed of the fan for air-cooling the battery pack.

[0009] In one embodiment, obtaining the cell operation state parameters of the battery pack includes: obtaining the median value of the cell operation current of the battery pack.

[0010] In one embodiment, performing an operation deviation process on the cell operation state parameters and preset operation state parameters to obtain a cell operation deviation includes: obtaining the deviation between the median value of the cell operation current and the preset current median value to obtain a median current deviation of the cells.

[0011] In one embodiment, sending a fan power adjustment signal to the cell air-cooling control system according to the cell operation deviation to adjust the rotational speed of the fan for air-cooling the battery pack includes: detecting whether the median current deviation of the cells is greater than a preset median current deviation; when the median current deviation of the cells is equal to the preset median current deviation, sending a linear signal of the fan to the cell air-cooling control system to make the rotational speed of the fan for air-cooling the battery pack change linearly with the current.

[0012] A battery pack air-cooling heat dissipation monitoring device includes: a cell operation acquisition module, a cell operation processing module, and an air-cooling regulation module; the cell operation acquisition module is used to obtain the cell operation state parameters of the battery pack; the cell operation processing module is used to perform an operation deviation process on the cell operation state parameters and preset operation state parameters to obtain a cell operation deviation; the air-cooling regulation module is used to send a fan power adjustment signal to the cell air-cooling control system according to the cell operation deviation to adjust the rotational speed of the fan for air-cooling the battery pack.

[0013] A computer device includes a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented: Obtain the cell operation state parameters of the battery pack; Perform an operation deviation process on the cell operation state parameters and preset operation state parameters to obtain a cell operation deviation; Send a fan power adjustment signal to the cell air-cooling control system according to the cell operation deviation to adjust the rotational speed of the fan for air-cooling the battery pack.

[0014] A computer-readable storage medium has a computer program stored thereon, and when the computer program is executed by a processor, the following steps are implemented: Obtain the operating state parameters of the battery cells of the battery pack; Perform operation adjustment processing on the operating state parameters of the battery cells and preset operating state parameters to obtain the operation adjustment of the battery cells; Send a fan power adjustment signal to the battery cell air-cooling control system according to the operation adjustment of the battery cells to adjust the fan speed for air-cooling the battery pack.

[0015] Compared with the prior art, the present disclosure has at least the following advantages: After collecting the operating state parameters of the battery cells, determine the current working mode of the battery pack, and then compare the operating state parameters of the battery cells with the standard operating state parameters of the battery cells to facilitate determining the difference between the current working mode of the battery pack and the specified working mode. Finally, according to the above difference value, adjust the air-cooling mode of the battery pack to facilitate optimizing the heat dissipation method of the battery pack, keeping the battery cooling effect optimal, effectively improving the cooling efficiency, and at the same time reducing energy waste. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present disclosure, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a flowchart of a method for monitoring air-cooling of a battery pack in an embodiment; Figure 2 It is a schematic internal structure diagram of a battery pack in an embodiment; Figure 3 It is an internal structure diagram of a computer device in an embodiment. Detailed Embodiments

[0018] To facilitate understanding of the present disclosure, the following will describe the present disclosure more comprehensively with reference to the relevant drawings. The preferred embodiments of the present disclosure are shown in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thorough and comprehensive.

[0019] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this disclosure belongs. The terms used in the description of this disclosure herein are only for the purpose of describing specific implementations and are not intended to limit this disclosure. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0021] This disclosure relates to a method for monitoring the air-cooled heat dissipation of a battery pack. In one embodiment, the method for monitoring the air-cooled heat dissipation of the battery pack includes obtaining the operating state parameters of the battery cells of the battery pack; performing an operation adjustment process on the operating state parameters of the battery cells and preset operating state parameters to obtain the operation adjustment of the battery cells; and sending a fan power adjustment signal to the air-cooled control system of the battery cells according to the operation adjustment of the battery cells to adjust the fan speed for air-cooled heat dissipation of the battery pack. After collecting the operating state parameters of the battery cells, the current working mode of the battery pack is determined, and then the operating state parameters of the battery cells are compared with the standard operating state parameters of the battery cells to facilitate determining the difference between the current working mode of the battery pack and the specified working mode. Finally, according to the above difference value, the air-cooled mode of the battery pack is adjusted to optimize the heat dissipation method of the battery pack, so that the battery cooling effect is maintained at the best, effectively improving the cooling efficiency and at the same time reducing energy waste.

[0022] Please refer to Figure 1 , which is the flow of the method for monitoring the air-cooled heat dissipation of a battery pack according to an embodiment of this disclosure. The method for monitoring the air-cooled heat dissipation of the battery pack includes some or all of the following steps.

[0023] S100: Obtain the operating state parameters of the battery cells of the battery pack.

[0024] In this embodiment, the operating state parameters of the battery cells are the operating data of the individual battery cells of the battery pack, that is, the operating state parameters of the battery cells are the current working conditions of the individual battery cells of the battery pack, that is, the operating state parameters of the battery cells correspond to the real-time working conditions of the individual battery cells of the battery pack. By collecting the operating state parameters of the battery cells, it is convenient to determine the operating conditions corresponding to the current working states of the individual battery cells of the battery pack.

[0025] S200: Perform running adjustment processing on the cell operating state parameters and the preset operating state parameters to obtain the cell running adjustment.

[0026] In this embodiment, the cell operating state parameters are the operating data of the individual cells of the battery pack, that is, the cell operating state parameters are the current working conditions of the individual cells of the battery pack, which also means that the cell operating state parameters correspond to the real-time working conditions of the individual cells of the battery pack. By collecting the cell operating state parameters, it is convenient to determine the operating conditions corresponding to the current working states of the individual cells of the battery pack. The preset operating state parameters are the operating data of the designated individual cells of the battery pack, that is, the preset operating state parameters are the standard working conditions of the individual cells of the battery pack, which also means that the preset operating state parameters correspond to the reference working conditions of the individual cells of the battery pack. By performing running adjustment processing on the cell operating state parameters and the preset operating state parameters, it is convenient to determine the degree of difference between the current working conditions and the standard working conditions of the individual cells of the battery pack.

[0027] S300: Send a fan power adjustment signal to the cell air-cooling control system according to the cell running adjustment to adjust the fan speed for air-cooling the battery pack.

[0028] In this embodiment, the cell running adjustment is obtained based on the cell operating state parameters and the preset operating state parameters. The cell operating state parameters are the operating data of the individual cells of the battery pack, that is, the cell operating state parameters are the current working conditions of the individual cells of the battery pack, which also means that the cell operating state parameters correspond to the real-time working conditions of the individual cells of the battery pack. By collecting the cell operating state parameters, it is convenient to determine the operating conditions corresponding to the current working states of the individual cells of the battery pack. The preset operating state parameters are the operating data of the designated individual cells of the battery pack, that is, the preset operating state parameters are the standard working conditions of the individual cells of the battery pack, which also means that the preset operating state parameters correspond to the reference working conditions of the individual cells of the battery pack. By performing running adjustment processing on the cell operating state parameters and the preset operating state parameters, it is convenient to determine the degree of difference between the current working conditions and the standard working conditions of the individual cells of the battery pack. After obtaining the cell running adjustment, the heat generated by the battery pack can be determined, which is convenient for adjusting the air-cooling mode of the battery pack, making the fan speed for air-cooling the battery pack adaptable thereto, effectively improving the cooling efficiency, and at the same time reducing energy waste.

[0029] In the above embodiments, after collecting the operating state parameters of the battery cells, the current working mode of the battery pack is determined. Then, the operating state parameters of the battery cells are compared with the standard operating state parameters of the battery cells, so as to determine the difference between the current working mode of the battery pack and the specified working mode. Finally, according to the above difference value, the air-cooling mode of the battery pack is adjusted, so as to optimize the heat dissipation method of the battery pack, keep the best battery cooling effect, effectively improve the cooling efficiency, and at the same time reduce energy waste.

[0030] In one of the embodiments, obtaining the operating state parameters of the battery cells of the battery pack includes: obtaining the median value of the operating current of the battery cells of the battery pack. In this embodiment, the operating state parameters of the battery cells are the operating data of each battery cell of the battery pack, that is, the operating state parameters of the battery cells are the current working conditions of each battery cell of the battery pack, that is, the operating state parameters correspond to the real-time working conditions of the battery cells of the battery pack. By collecting the operating state parameters of the battery cells, it is convenient to determine the operating conditions corresponding to the current working states of the battery cells of the battery pack. The operating state parameters of the battery cells include the median value of the operating current of the battery cells of the battery pack, and the median value of the operating current of the battery cells is the average value of the temperatures of all battery cells corresponding to the current operating state of the battery pack. By collecting the median value of the operating current of the battery cells, it is convenient to determine the change of the average temperature of the real-time battery cells of the battery pack.

[0031] Further, the operation adjustment process of the cell operation state parameters and the preset operation state parameters to obtain the cell operation adjustment includes: obtaining the adjustment of the median value of the cell operation current and the preset average temperature to obtain the cell average temperature adjustment. In this embodiment, the cell operation state parameters are the operation data of the cell monomers of the battery pack, that is, the cell operation state parameters are the current working conditions of the cell monomers of the battery pack, that is, the cell operation state parameters correspond to the real-time working conditions of the cell monomers of the battery pack. By collecting the cell operation state parameters, it is convenient to determine the operation conditions corresponding to the current working states of the cell monomers of the battery pack. The preset operation state parameters are the operation data of the designated cell monomers of the battery pack, that is, the preset operation state parameters are the standard working conditions of the cell monomers of the battery pack, that is, the preset operation state parameters correspond to the reference working conditions of the cell monomers of the battery pack. By performing the operation adjustment process on the cell operation state parameters and the preset operation state parameters, it is convenient to determine the degree of difference between the current working conditions and the standard working conditions of the cell monomers of the battery pack. The cell operation state parameters include the median value of the cell operation current of the battery pack, and the median value of the cell operation current is the average value of the temperatures of all the cells corresponding to the current operation state of the battery pack. By collecting the median value of the cell operation current, it is convenient to determine the change of the real-time average temperature of the cells of the battery pack. The preset average temperature is the average value of the temperatures of all the cells corresponding to the standard operation state of the battery pack. For example, the preset average temperature is the average value of the safe cell temperatures of the battery pack. By performing the adjustment of the median value of the cell operation current and the preset average temperature, the least squares difference between the average temperature of the cells in the current operation state of the battery pack and the average temperature of the designated cells is obtained to reduce the error of the cell average temperature adjustment, which is convenient to determine the degree of difference between the current average temperature of the cells of the battery pack and the standard average temperature of the cells, so as to facilitate the determination of whether the battery pack is in the stage of abnormal heat dissipation.

[0032] Further, sending a fan power adjustment signal to the battery cell air-cooling control system according to the battery cell operation deviation to adjust the fan speed for air-cooling the battery pack includes: detecting whether the average temperature deviation of the battery cells is greater than a preset average temperature deviation; when the average temperature deviation of the battery cells is greater than the preset average temperature deviation, sending a full-power signal of the fan to the battery cell air-cooling control system to maximize the fan speed for air-cooling the battery pack. In this embodiment, the battery cell operation deviation is obtained based on the battery cell operation state parameters and the preset operation state parameters. The battery cell operation state parameters are the operation data of the battery cell monomers of the battery pack, that is, the battery cell operation state parameters are the current working conditions of each battery cell monomer of the battery pack, that is, the battery cell operation state parameters correspond to the real-time working conditions of the battery cell monomers of the battery pack. By collecting the battery cell operation state parameters, it is convenient to determine the operation conditions corresponding to the current working states of each battery cell monomer of the battery pack. The preset operation state parameters are the operation data of the specified battery cell monomers of the battery pack, that is, the preset operation state parameters are the standard working conditions of each battery cell monomer of the battery pack, that is, the preset operation state parameters correspond to the reference working conditions of the battery cell monomers of the battery pack. Through the operation deviation processing of the battery cell operation state parameters and the preset operation state parameters, it is convenient to determine the difference degree between the current working conditions and the standard working conditions of each battery cell monomer of the battery pack. After obtaining the battery cell operation deviation, the heat generated by the battery pack can be determined, which is convenient to adjust the air-cooling mode of the battery pack, so that the fan speed for air-cooling the battery pack is adapted thereto, effectively improving the cooling efficiency and reducing energy waste at the same time. The battery cell operation state parameters include the median value of the battery cell operation current of the battery pack. The median value of the battery cell operation current is the average value of the temperatures of all battery cells corresponding to the current operation state of the battery pack. By collecting the median value of the battery cell operation current, it is convenient to determine the change of the real-time average temperature of the battery cells of the battery pack. The preset average temperature is the average value of the temperatures of all battery cells corresponding to the standard operation state of the battery pack. For example, the preset average temperature is the average value of the safe battery cell temperatures of the battery pack. By taking the deviation between the median value of the battery cell operation current and the preset average temperature, the least squares difference between the average temperature value of the battery pack in the current operation state and the specified battery cell temperature average value is obtained to reduce the error of the average temperature deviation of the battery cells, which is convenient to determine the difference degree between the current average temperature of the battery cells of the battery pack and the standard average temperature of the battery cells, so as to facilitate determining whether the battery pack is in the abnormal heat dissipation stage.The average temperature equalization of the battery cells is greater than the preset average temperature equalization, indicating that the average temperature of the battery pack is too high under the current operating state, that is, it indicates that the battery cells of the battery pack are generally overheated. At this time, by sending a full-power signal of the fan to the battery cell air-cooling control system, the fan operates at full power, so that the rotational speed of the fan for air-cooling the battery pack is maximized, and the air-cooling heat dissipation rate of the battery pack is the fastest, which is convenient for efficient heat dissipation when the battery cells of the battery pack are at a high temperature.

[0033] In another embodiment, when the average temperature equalization of the battery cells is less than the preset average temperature equalization, a low-power signal of the fan is sent to the battery cell air-cooling control system to minimize the rotational speed of the fan for air-cooling the battery pack. At this time, the temperatures of the battery cells of the battery pack are below the safe temperature. Specifically, the safe temperature is between 30°C and 50°C, and the normal operation of the battery pack can be ensured by the fan operating at low power.

[0034] In another embodiment, when the average temperature equalization of the battery cells is equal to the preset average temperature equalization, a linear signal of the fan is sent to the battery cell air-cooling control system to make the rotational speed of the fan for air-cooling the battery pack change linearly with the current. At this time, the temperatures of the battery cells of the battery pack are above the safe temperature and are in a state of temperature rise. The fan power changes linearly with the temperature, so that the heat dissipation efficiency of the battery pack is adapted to the fan power, and the energy consumption of the fan is the lowest on the premise of ensuring the normal operation of the battery pack.

[0035] In one of the embodiments, obtaining the operating state parameters of the battery cells of the battery pack includes: obtaining the median value of the operating current of the battery cells of the battery pack. In this embodiment, the operating state parameters of the battery cells are the operating data of the individual battery cells of the battery pack, that is, the operating state parameters of the battery cells are the current working conditions of the individual battery cells of the battery pack, that is, the operating state parameters correspond to the real-time working conditions of the individual battery cells of the battery pack. By collecting the operating state parameters of the battery cells, it is convenient to determine the operating conditions corresponding to the current working state of the individual battery cells of the battery pack. The operating state parameters of the battery cells include the median value of the operating current of the battery cells of the battery pack. The median value of the operating current of the battery cells is the average value of all the battery cell currents corresponding to the battery pack under the current operating state. By collecting the median value of the operating current of the battery cells, it is convenient to determine the change situation of the real-time average current of the battery cells of the battery pack.

[0036] Further, the operation adjustment process of the cell operation state parameters and the preset operation state parameters to obtain the cell operation adjustment includes: obtaining the adjustment between the median value of the cell operation current and the preset current median value to obtain the cell medium current adjustment. In this embodiment, the cell operation state parameters are the operation data of the cell monomers of the battery pack, that is, the cell operation state parameters are the current working conditions of the cell monomers of the battery pack, that is, the cell operation state parameters correspond to the real-time working conditions of the cell monomers of the battery pack. By collecting the cell operation state parameters, it is convenient to determine the operation conditions corresponding to the current working states of the cell monomers of the battery pack. The preset operation state parameters are the operation data of the specified cell monomers of the battery pack, that is, the preset operation state parameters are the standard working conditions of the cell monomers of the battery pack, that is, the preset operation state parameters correspond to the reference working conditions of the cell monomers of the battery pack. By performing the operation adjustment process on the cell operation state parameters and the preset operation state parameters, it is convenient to determine the degree of difference between the current working conditions and the standard working conditions of the cell monomers of the battery pack. The cell operation state parameters include the median value of the cell operation current of the battery pack, and the median value of the cell operation current is the average value of all cell currents corresponding to the battery pack in the current operation state. By collecting the median value of the cell operation current, it is convenient to determine the change of the real-time average cell current of the battery pack. The preset average current is the average value of all cell currents corresponding to the battery pack in the standard operation state. For example, the preset average current is the average value of the safe cell currents of the battery pack. By performing the adjustment between the median value of the cell operation current and the preset current median value, the least square difference between the average current value of the battery pack in the current operation state and the average current value of the specified cell is obtained to reduce the error of the cell medium current adjustment, which is convenient to determine the degree of difference between the current average cell current of the battery pack and the standard average cell current, so as to determine whether the battery pack is in the abnormal heat dissipation stage caused by overcurrent.

[0037] Further, sending a fan power adjustment signal to the cell air-cooling control system according to the cell operation deviation to adjust the fan speed for air-cooling the battery pack includes: detecting whether the current deviation in the cell is greater than a preset current deviation; when the current deviation in the cell is equal to the preset current deviation, sending a fan linear signal to the cell air-cooling control system so that the fan speed for air-cooling the battery pack changes linearly with the current. In this embodiment, the cell operation deviation is obtained based on the cell operation state parameters and the preset operation state parameters. The cell operation state parameters are the operation data of the cell monomers of the battery pack, that is, the cell operation state parameters are the current working conditions of each cell monomer of the battery pack, and also the cell operation state parameters correspond to the real-time working conditions of the cell monomers of the battery pack. By collecting the cell operation state parameters, it is convenient to determine the operation conditions corresponding to the current working states of the cell monomers of the battery pack. The preset operation state parameters are the operation data of the specified cell monomers of the battery pack, that is, the preset operation state parameters are the standard working conditions of each cell monomer of the battery pack, and also the preset operation state parameters correspond to the reference working conditions of the cell monomers of the battery pack. By performing an operation deviation process on the cell operation state parameters and the preset operation state parameters, it is convenient to determine the degree of difference between the current working conditions and the standard working conditions of the cell monomers of the battery pack. After obtaining the cell operation deviation, the heat generated by the battery pack can be determined, which is convenient to adjust the air-cooling mode of the battery pack, so that the fan speed for air-cooling the battery pack is adapted to it, effectively improving the cooling efficiency and at the same time reducing energy waste. The cell operation state parameters include the median value of the cell operation current of the battery pack. The median value of the cell operation current is the average value of all cell currents corresponding to the battery pack in the current operation state. By collecting the median value of the cell operation current, it is convenient to determine the change situation of the real-time average cell current of the battery pack. The preset current median value is the average value of all cell currents corresponding to the battery pack in the standard operation state. For example, the preset current median value is the average value of the safe cell currents of the battery pack. By performing a deviation between the median value of the cell operation current and the preset current median value, the least squares difference between the average current value of the battery pack in the current operation state and the average current value of the specified cells is obtained to reduce the error of the current deviation in the cell, which is convenient to determine the degree of difference between the current average cell current of the battery pack and the standard average cell current, so as to facilitate determining whether the battery pack is in the stage of abnormal heat dissipation caused by overcurrent. When the current deviation in the cell is equal to the preset current deviation, a fan linear signal is sent to the cell air-cooling control system so that the fan speed for air-cooling the battery pack changes linearly with the current.At this time, the current of each battery cell in the battery pack is above the safe current and shows a rising state, resulting in an increase in the temperature of the battery cells. The fan power changes linearly with the current, making the heat dissipation efficiency of the battery pack match the fan power. On the premise of ensuring the normal operation of the battery pack, the energy consumption of the fan is the lowest.

[0038] In another embodiment, the leveling difference in the battery cells is greater than the preset leveling difference, indicating that the average current of the battery pack is too large in the current operating state, that is, it indicates that the battery cells of the battery pack are generally overheated. At this time, a full-power signal of the fan is sent to the air-cooling control system of the battery cells, and the fan runs at full power to maximize the rotational speed of the fan for air-cooling the battery pack, so that the air-cooling rate of the battery pack is the fastest, facilitating efficient heat dissipation when the battery cells of the battery pack are at a high temperature.

[0039] In another embodiment, when the leveling difference in the battery cells is less than the preset leveling difference, a low-power signal of the fan is sent to the air-cooling control system of the battery cells to minimize the rotational speed of the fan for air-cooling the battery pack. At this time, the current of each battery cell in the battery pack is below the safe current. Specifically, the safe current includes the safe charging current and the safe discharging current of the battery pack. The safe charging current of the battery pack is between 0.5C and 2.5C, and the safe discharging current of the battery pack is between 4C and 6C. The fan running at low power can ensure the normal operation of the battery pack.

[0040] In the actual air-cooling process of the battery pack, since the battery pack is a module assembled by multiple battery cells, the degree of heat accumulation of the battery cells at different positions is inconsistent. Under the same fan air speed, there will still be a situation of poor heat dissipation in some areas of the battery pack, which is limited by the size of the fan air outlet, and increasing the number of fans will lead to an increase in cost.

[0041] To ensure the same heat dissipation effect at each position of the battery pack, before sending a fan power adjustment signal to the air-cooling control system of the battery cells according to the running leveling difference of the battery cells to adjust the rotational speed of the fan for air-cooling the battery pack, the following steps are further included: Obtain the average temperature of the first area, the average temperature of the second area, and the average temperature of the third area of the battery pack; Perform interval temperature difference processing on the average temperature of the first area, the average temperature of the second area, and the average temperature of the third area to obtain a first interval temperature difference and a second interval temperature difference; Detect whether the first interval temperature difference is greater than the second interval temperature difference; When the first interval temperature difference is greater than the second interval temperature difference, send a first louver deflection signal to the air-cooling control system of the battery cells to deflect the louver of the fan towards the first battery cell area of the battery pack.

[0042] In this embodiment, the battery pack has multiple battery cell regions, including a first battery cell region, a second battery cell region, and a third battery cell region that are arranged adjacent to each other in sequence, as Figure 2 shown. Among them, the average temperature of the first region is the average temperature of each battery cell in the first battery cell region, the average temperature of the second region is the average temperature of each battery cell in the second battery cell region, and the average temperature of the third region is the average temperature of each battery cell in the third battery cell region. By collecting the temperatures of the battery cells in three adjacent regions, the temperature distribution of each region of the battery pack is determined. The interval temperature difference processing of the average temperature of the first region, the average temperature of the second region, and the average temperature of the third region is to differentially process the temperatures of each battery cell region. Specifically, taking the average temperature of the second region as a reference, the differences between the average temperature of the first region and the average temperature of the third region are respectively obtained, and the battery cell temperature differences between the first battery cell region and the second battery cell region, and between the third battery cell region and the second battery cell region are obtained, that is, the first interval temperature difference and the second interval temperature difference. The first interval temperature difference is the difference between the average temperature of the first region and the average temperature of the second region, and the second interval temperature difference is the difference between the average temperature of the third region and the average temperature of the second region. By comparing the differences between the first interval temperature difference and the second interval temperature difference, the temperature distribution of the battery cells in each region of the battery pack is determined. When the first interval temperature difference is greater than the second interval temperature difference, it indicates that the battery cell temperature in the first battery cell region is the highest. At this time, a first louver deflection signal is sent to the battery cell air-cooling control system to deflect the louver of the fan towards the first battery cell region of the battery pack, so as to facilitate aligning the air outlet of the fan with the first battery cell region, enabling the battery cells in the region with the highest battery cell temperature to receive more cold air volume, to avoid the situation that the battery cells in a certain region of the battery pack overheat.

[0043] In another embodiment, when the first interval temperature difference is less than the second interval temperature difference, a second louver deflection signal is sent to the battery cell air-cooling control system to deflect the louver of the fan towards the third battery cell region of the battery pack.

[0044] Further, when the first interval temperature difference is equal to the second interval temperature difference, it is detected whether the first interval temperature difference is greater than 0; When the first interval temperature difference is greater than 0, the first interval temperature difference is subjected to a temperature difference partial derivative process to obtain an interval temperature derivative value; It is detected whether the interval temperature derivative value is greater than 0; When the interval temperature derivative value is greater than 0, a lateral louver speed reduction signal is sent to the battery cell air-cooling control system to reduce the deflection speed of the louver of the fan towards the first battery cell region and the third battery cell region of the battery pack.

[0045] In this embodiment, the temperature difference between the first intervals is equal to the temperature difference between the second intervals, indicating that the cell temperatures of the first cell region and the third cell region are equal relative to the cell temperature of the second cell region. At this time, there are cases where the cell temperatures in the cell regions on both sides of the battery pack are higher than those in the middle cell region, and there are also cases where they are lower. The temperature difference between the first intervals being greater than 0 indicates that the cell temperatures in the cell regions on both sides of the battery pack are higher than those in the middle cell region. By performing a differential treatment on the temperature difference between the first intervals, specifically, performing a time partial derivative on the temperature difference between the first intervals to obtain the current temperature change trend of the cell temperatures in the cell regions on both sides of the battery pack. The value of the interval temperature derivative being greater than 0 indicates that the cell temperatures in the cell regions on both sides of the battery pack show a rapid upward trend. By sending a signal to reduce the speed of the lateral swing blades to the cell air-cooling control system, the speed at which the louvers of the fan deflect towards the first cell region and the third cell region of the battery pack is reduced, so that the amount of cold air passing through the first cell region and the third cell region per unit time increases, thereby rapidly reducing the temperatures of the first cell region and the third cell region.

[0046] In another embodiment, when the value of the interval temperature derivative is less than or equal to 0, a signal to reduce the speed of the middle swing blades is sent to the cell air-cooling control system to reduce the speed at which the louvers of the fan deflect towards the second cell region of the battery pack. In this embodiment, the value of the interval temperature derivative being less than or equal to 0 indicates that the cell temperatures in the cell regions on both sides of the battery pack show a rapid downward trend. By sending a signal to reduce the speed of the middle swing blades to the cell air-cooling control system to reduce the speed at which the louvers of the fan deflect towards the second cell region of the battery pack, the amount of cold air passing through the second cell region per unit time is greater than the amount of cold air passing through the first cell region and the third cell region per unit time, facilitating maintaining the same temperature in each cell region.

[0047] In another embodiment, when the temperature difference between the first intervals is less than or equal to 0, a to-and-fro signal is sent to the cell air-cooling control system to make the louvers of the fan swing back and forth at a uniform speed between the cell regions. In this embodiment, the temperature difference between the first intervals being less than or equal to 0 indicates that the cell temperatures in the cell regions on both sides of the battery pack are lower than or equal to the cell temperature of the middle cell region, and usually the heat accumulation region of the battery pack is in the middle region, that is, it diffuses from the middle to the surroundings, that is, under normal circumstances, the temperature in the middle is higher than that in the regions on both sides. At this time, by sending a to-and-fro signal to the cell air-cooling control system to make the louvers of the fan swing back and forth at a uniform speed between the cell regions, that is, the louvers of the fan swing normally, the heat dissipation effect of each cell region is the same, and at the same time, the situation of excessive power consumption of the fan can be avoided.

[0048] In another embodiment, real-time prediction of the above data is performed, and the specific process is as follows: ① Data collection and preprocessing: Collect historical temperature data and current temperature data, and preprocess the collected data; ② Select AI algorithms: including but not limited to time series prediction algorithms, regression algorithms, reinforcement learning algorithms, etc., and select specific algorithms according to specific projects; ③ Model training: Use historical data to train the selected AI algorithm model. During the training process, model parameters need to be adjusted to optimize the prediction performance; ④ Model evaluation and optimization: Evaluate the trained model, measure the prediction performance of the model, and optimize the model according to the evaluation results; ⑤ Real-time prediction and control: Deploy the trained model to a real-time prediction system, generate control signals according to the current temperature data for real-time prediction, and adjust temperature control devices, such as fan speed and louver angle, to achieve intelligent control; ⑥ Monitoring and feedback, monitor the running status of the system in real time, record the prediction results and control effects, form a closed-loop feedback mechanism, and continuously optimize the model and control strategy.

[0049] The above various preset variables are all set in the database for easy extraction in a timely manner, and different preset variables are placed in different storage units, that is, in different storage stacks. Moreover, the average temperature of the first area, the average temperature of the second area, and the average temperature of the third area can be collected by corresponding detectors. For example, they can be collected by the infrared thermometer of the battery cell operation acquisition module.

[0050] In one embodiment, the present disclosure also relates to a battery pack air-cooling heat dissipation monitoring device, including: a battery cell operation acquisition module, a battery cell operation processing module, and an air-cooling regulation module; the battery cell operation acquisition module is used to obtain the battery cell operation state parameters of the battery pack; the battery cell operation processing module is used to perform operation adjustment processing on the battery cell operation state parameters and preset operation state parameters to obtain the battery cell operation adjustment; the air-cooling regulation module is used to send a fan power adjustment signal to the battery cell air-cooling control system according to the battery cell operation adjustment to adjust the fan speed for air-cooling heat dissipation of the battery pack.

[0051] In this embodiment, after the battery cell operation acquisition module collects the battery cell operation state parameters, the current working mode of the battery pack is determined. Then, the battery cell operation processing module compares the battery cell operation state parameters with the standard battery cell operation state parameters to facilitate determining the difference between the current working mode of the battery pack and the specified working mode. Finally, the air-cooling regulation module adjusts the air-cooling mode of the battery pack according to the above difference value to optimize the heat dissipation method of the battery pack, keep the battery cooling effect optimal, effectively improve the cooling efficiency, and at the same time reduce energy waste.

[0052] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structural diagram may be as shown in Figure 3 . The computer device includes a processor, a memory, and a network interface connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store data such as the operating state parameters of the battery cells, the unevenness of the battery cell operation, and the fan power adjustment signal. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, it implements a method for monitoring the air-cooled heat dissipation of a battery pack.

[0053] Those skilled in the art can understand that Figure 3 the structure shown in is only a block diagram of some structures related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements.

[0054] In one of the embodiments, the present application further provides a computer device, including a memory and a processor. A computer program is stored in the memory, and when the processor executes the computer program, the steps in the above method embodiments are implemented.

[0055] In one of the embodiments, the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by the processor, the steps in the above method embodiments are implemented.

[0056] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, storage, database, or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memories. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0057] The above-described embodiments merely represent several implementation manners of the present disclosure. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present disclosure, several modifications and improvements can still be made, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be subject to the appended claims.

Claims

1. A battery pack air cooling heat dissipation monitoring method, characterized in that: include: Get the battery pack's cell operating status parameters; Performing operation adjustment processing on the battery cell operation state parameter and the preset operation state parameter to obtain the battery cell operation adjustment; A fan power adjustment signal is sent to a battery cell air cooling control system according to the battery cell operation balance to adjust the speed of a fan for air cooling and heat dissipation of the battery pack.

2. The battery pack air cooling heat dissipation monitoring method according to claim 1, characterized in that: The obtaining of the battery cell operating status parameters of the battery pack includes: Obtain the median operating current of the battery cells of the battery pack.

3. The battery pack air cooling heat dissipation monitoring method according to claim 2, characterized in that: The step of performing operation adjustment processing on the battery cell operation state parameter and the preset operation state parameter to obtain the battery cell operation adjustment comprises: The difference between the median value of the battery cell operating current and the preset average temperature is calculated to obtain the battery cell average temperature difference.

4. The battery pack air cooling heat dissipation monitoring method according to claim 3, characterized in that: The step of sending a fan power adjustment signal to a battery cell air cooling control system according to the battery cell operation balance to adjust the speed of a fan for air cooling the battery pack includes: Detecting whether the average temperature difference of the battery cell is greater than a preset average temperature difference; When the average temperature difference of the battery cell is greater than the preset average temperature difference, a fan full power signal is sent to the battery cell air cooling control system to maximize the speed of the fan for air cooling and heat dissipation of the battery pack.

5. The battery pack air cooling heat dissipation monitoring method according to claim 1, characterized in that: The obtaining of the battery cell operating status parameters of the battery pack includes: Obtain the median operating current of the battery cells of the battery pack.

6. The battery pack air cooling heat dissipation monitoring method according to claim 5, characterized in that: The step of performing operation adjustment processing on the battery cell operation state parameter and the preset operation state parameter to obtain the battery cell operation adjustment comprises: The difference between the median current of the battery cell and the preset current median is calculated to obtain the battery cell current difference.

7. The battery pack air cooling heat dissipation monitoring method according to claim 6, characterized in that: The step of sending a fan power adjustment signal to a battery cell air cooling control system according to the battery cell operation balance to adjust the speed of a fan for air cooling the battery pack includes: Detecting whether the level difference in the battery cell is greater than a preset level difference; When the leveling difference in the battery cell is equal to the preset leveling difference, a fan linear signal is sent to the battery cell air cooling control system so that the speed of the fan for air cooling and heat dissipation of the battery pack changes linearly with the current.

8. A battery pack air cooling heat dissipation monitoring device, characterized in that: include: A cell operation acquisition module, which is used to obtain cell operation status parameters of the battery pack; A cell operation processing module, the cell operation processing module is used to perform operation adjustment processing on the cell operation state parameter and the preset operation state parameter to obtain the cell operation adjustment; The air cooling control module is used to send a fan power adjustment signal to the battery cell air cooling control system according to the battery cell operation balance, so as to adjust the fan speed for air cooling and heat dissipation of the battery pack.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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