Battery pack power adjustment methods, devices and electronic equipment

Abstract

This application discloses a power adjustment method, apparatus, and electronic device for a battery pack. The method includes: acquiring the operating status information and current power adjustment direction of the battery pack at the current sampling time; determining the target output power of the battery pack based on the operating status information and the current power adjustment direction; determining the power regulation rate of the battery pack based on the target output power; and adjusting the power of the battery pack based on the target output power and the power regulation rate. This application solves the technical problem of unsatisfactory power adjustment effect of battery packs in related technologies.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a power adjustment method, apparatus, and electronic device for a battery pack. Background Technology

[0002] With the widespread use of electric vehicles, battery pack performance and management have become crucial factors determining the driving range, power performance, and overall reliability of electric vehicles. Battery pack power regulation, especially under low charge conditions, is essential for ensuring electric vehicle safety, optimizing the driving experience, and extending battery life. When a battery pack is under low charge, its electrochemical performance deteriorates significantly, leading to unstable output voltage and power, and potentially triggering undervoltage faults or overheating protection, severely impacting the safe operation of the electric vehicle.

[0003] Related technologies typically employ a fixed threshold power adjustment strategy, which automatically reduces output power when the battery pack's state of charge or voltage drops to a preset threshold. However, this approach struggles to accurately adapt to the battery's real-time state under rapidly changing battery performance or complex electric vehicle operating conditions. This results in untimely output power adjustments, affecting driving smoothness and potentially triggering frequent undervoltage and other fault alarms, which is detrimental to the safe operation of electric vehicles. Therefore, related technologies suffer from the technical problem of unsatisfactory battery pack power adjustment performance.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] This application provides a method, apparatus, and electronic device for adjusting the power of a battery pack, so as to at least solve the technical problem of unsatisfactory power adjustment effect of the battery pack in the related art.

[0006] According to one aspect of the embodiments of this application, a power adjustment method for a battery pack is provided, comprising: acquiring the operating state information and current power adjustment direction of the battery pack at the current sampling time; determining the target output power of the battery pack based on the operating state information and the current power adjustment direction; determining the power adjustment rate of the battery pack based on the target output power; and adjusting the power of the battery pack based on the target output power and the power adjustment rate. By determining the target output power of the battery pack, the power adjustment of the battery pack can be made more precise, avoiding sudden changes in output power and improving the power adjustment effect and user experience. At the same time, by accurately calculating the power adjustment rate, the power output of the battery pack can be smoothly changed, avoiding sudden power fluctuations, reducing the impact on the battery pack, improving the operating stability and reliability of the electric vehicle, and thus improving the power adjustment effect of the battery pack.

[0007] Optionally, based on the operating status information and the current power adjustment direction, the target output power of the battery pack is determined, including: when the current power adjustment direction is downward, determining the first output power of the battery pack based on the state of charge information and temperature information included in the operating status information, as well as a preset lower limit power; determining the second output power of the battery pack based on the operating status information and a preset undervoltage threshold, wherein the preset undervoltage threshold is used to determine whether the battery pack is in an undervoltage state; and determining the smaller power value between the first output power and the second output power as the target output power. By incorporating the preset undervoltage threshold into the power adjustment, it is ensured that even under extreme conditions, the battery pack will not exceed the safe operating range, effectively preventing undervoltage faults and improving the rationality and stability of the battery pack power adjustment.

[0008] Optionally, based on the state of charge (SOC) and temperature information included in the operating status information, and a preset lower power limit, the first output power of the battery pack is determined. This includes: obtaining the lookup power of the battery pack using linear interpolation based on the SOC and temperature information; if the lookup power is less than the preset lower power limit, the lookup power is determined as the first output power; or if the lookup power is greater than or equal to the preset lower power limit, the preset lower power limit is determined as the first output power. By comparing the lookup power with the preset lower power limit, it is possible to maintain the power output capability as much as possible while ensuring the safe operation of the battery pack, thus achieving a balance between safety and driving performance.

[0009] Optionally, based on operating status information and a preset undervoltage threshold, the second output power of the battery pack is determined, including: determining the minimum cell voltage included in the operating status information, wherein the minimum cell voltage refers to the minimum voltage among the voltages corresponding to the multiple individual cells included in the battery pack; if the minimum cell voltage is less than the preset undervoltage threshold, the preset lower limit power is determined as the second output power; or if the minimum cell voltage is greater than or equal to the preset undervoltage threshold and less than the preset overvoltage threshold, the second output power is determined based on the operating status information, wherein the preset overvoltage threshold is used to determine whether the battery pack is in an overvoltage state, and the preset overvoltage threshold is greater than the preset undervoltage threshold. By comparing the minimum cell voltage of the battery pack with the preset undervoltage threshold and the preset overvoltage threshold, the undervoltage and overvoltage risks of the battery pack can be warned in advance, preventing the battery pack from entering an unsafe state, reducing the frequency of fault alarms, and improving the power adjustment effect.

[0010] Optionally, based on the operating status information and the current power adjustment direction, the target output power of the battery pack is determined, including: when the current power adjustment direction is upward, determining the minimum cell voltage included in the operating status information, wherein the minimum cell voltage refers to the minimum voltage among the voltages corresponding to the multiple individual cells included in the battery pack; when the minimum cell voltage is greater than or equal to a preset overvoltage threshold, obtaining a lookup table power using linear interpolation based on the state of charge information and temperature information included in the operating status information, and determining the lookup table power as the target output power, wherein the preset overvoltage threshold is used to determine whether the battery pack is in an overvoltage state; or when the minimum cell voltage is less than the preset overvoltage threshold and the minimum cell voltage is greater than or equal to a preset undervoltage threshold, determining a second output power based on the operating status information, and determining the second output power as the target output power, wherein the preset undervoltage threshold is used to determine whether the battery pack is in an undervoltage state. Through the above process, the power adjustment process of the battery pack can be made smoother, avoiding sudden voltage changes caused by power abrupt changes, thereby improving the power adjustment effect and maintaining the safe and stable operation of the battery pack.

[0011] Optionally, the second output power is determined based on the operating status information, including: obtaining the lookup power of the battery pack using linear interpolation based on the state of charge information and temperature information; and determining the second output power based on the lookup power, minimum cell voltage, preset undervoltage threshold, preset lower limit power, and preset overvoltage threshold. By using linear interpolation to determine the lookup power, and then dynamically adjusting the second output power based on the current minimum cell voltage, preset thresholds (including preset undervoltage threshold and preset overvoltage threshold), and preset lower limit power, the actual power output capability of the battery pack can be matched more accurately, thereby optimizing the energy utilization efficiency of the battery pack and improving the power adjustment effect of the battery pack.

[0012] Optionally, the power regulation rate of the battery pack is determined based on the target output power, including: determining the power difference of the battery pack based on the actual power of the battery pack included in the operating status information and the target output power; and determining the power regulation rate based on the power difference. The power regulation rate of the battery pack is determined according to the aforementioned power difference. Adjusting the power regulation rate can ensure a smooth transition of the battery pack during power changes, avoid sudden changes in power output, reduce damage to the battery pack, improve the power regulation effect of the battery pack, and simultaneously improve the comfort and safety of the user's driving experience.

[0013] According to another aspect of the embodiments of this application, a power adjustment device for a battery pack is provided, comprising: an information acquisition module for acquiring the operating status information and current power adjustment direction of the battery pack at the current sampling time; a first determination module for determining the target output power of the battery pack based on the operating status information and the current power adjustment direction; a second determination module for determining the power adjustment rate of the battery pack based on the target output power; and a power adjustment module for adjusting the power of the battery pack based on the target output power and the power adjustment rate.

[0014] According to another aspect of the embodiments of this application, a non-volatile storage medium is provided, which stores a plurality of instructions adapted for a power adjustment method of a battery pack, any one of which is loaded by a processor.

[0015] According to another aspect of the embodiments of this application, an electronic device is provided, including: one or more processors and a memory, the memory being used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors cause the one or more processors to implement any one of the following battery pack power adjustment methods.

[0016] According to another aspect of the embodiments of this application, a computer program product is provided, which, when executed on a data processing device, is adapted to perform the power adjustment method steps of a battery pack.

[0017] In this embodiment, the operating status information and current power adjustment direction of the battery pack at the current sampling time are collected; based on the operating status information and current power adjustment direction, the target output power of the battery pack is determined; based on the target output power, the power adjustment rate of the battery pack is determined; and based on the target output power and the power adjustment rate, the power of the battery pack is adjusted. This achieves the technical effect of improving the power adjustment effect of the battery pack by collecting the operating status information of the battery pack, determining the target output power and power adjustment rate of the battery pack, and then adjusting the power of the battery pack according to the aforementioned target output power and power adjustment rate. This solves the technical problem of unsatisfactory power adjustment effect of the battery pack in related technologies. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is a flowchart of a power adjustment method for a battery pack according to an embodiment of this application;

[0020] Figure 2This is a first schematic diagram of an optional power adjustment method for a battery pack according to an embodiment of this application;

[0021] Figure 3 This is a second schematic diagram of an optional power adjustment method for a battery pack according to an embodiment of this application;

[0022] Figure 4 This is a third schematic diagram of an optional power adjustment method for a battery pack according to an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of an optional battery pack power adjustment device provided according to an embodiment of this application. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] According to an embodiment of this application, a method embodiment for adjusting the power of a battery pack is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0027] Figure 1 This is a flowchart of a power adjustment method for a battery pack according to an embodiment of this application, such as... Figure 1 As shown, the method includes the following steps:

[0028] Step S102: Collect the battery pack's operating status information and current power adjustment direction at the current sampling time;

[0029] It is understandable that the system collects information on the battery pack's operating status and current power adjustment direction. This operating status information includes, but is not limited to, state of charge (SOC), temperature, voltage, and power. The current power adjustment direction includes both upward and downward adjustments. By collecting and analyzing the battery pack's operating status information and current power adjustment direction in real time, the target output power of the battery pack under specific conditions can be determined more accurately, achieving smoother power control.

[0030] Step S104: Determine the target output power of the battery pack based on the operating status information and the current power adjustment direction;

[0031] It is understandable that by analyzing the battery pack's operating status information and combining it with the current power adjustment direction, the target output power of the battery pack can be determined. By determining the target output power, the precision of the battery pack's power adjustment can be achieved, avoiding sudden changes in output power and improving power adjustment effectiveness and user experience.

[0032] In one optional embodiment, determining the target output power of the battery pack based on operating status information and the current power adjustment direction includes: when the current power adjustment direction is downward, determining a first output power of the battery pack based on the state of charge information and temperature information included in the operating status information, and a preset lower limit power; determining a second output power of the battery pack based on the operating status information and a preset undervoltage threshold, wherein the preset undervoltage threshold is used to determine whether the battery pack is in an undervoltage state; and determining the smaller power value between the first output power and the second output power as the target output power.

[0033] It is understandable that when the current power adjustment direction of the battery pack is downward, firstly, based on the state of charge and temperature information included in the battery pack's operating status information, and in conjunction with a preset lower power limit, the first output power of the battery pack is determined. This preset lower power limit refers to the minimum output power required to maintain the safe and stable operation of the battery pack. Secondly, based on the battery pack's operating status information and in conjunction with a preset undervoltage threshold, the second output power of the battery pack is determined. This preset undervoltage threshold is used to determine whether the battery pack is in an undervoltage state. Finally, the first and second output powers are compared, and the power corresponding to the smaller power value is determined as the target output power of the battery pack. By incorporating the preset undervoltage threshold into the power adjustment, it is ensured that even under extreme conditions, the battery pack will not exceed its safe operating range, effectively preventing undervoltage faults and improving the rationality and stability of the battery pack's power adjustment.

[0034] Alternatively, the apparent reason for the undervoltage phenomenon in electric vehicles operating at low SOC is that the cell voltage drops rapidly while the power drops slowly, leading to undervoltage. The deeper underlying reason is that under the current temperature and SOC conditions, due to historical discharge conditions, the actual discharge capacity of the battery pack is less than the lookup table value. That is, the maximum target output power that the battery pack can provide during discharge is less than the lookup table power obtained by looking up the table.

[0035] Optionally, when multiple factors simultaneously trigger power limiting (i.e., the current power adjustment direction of the battery pack is downward), the battery pack's power decrease rate is handled according to the principle of taking the larger value, and the target power decrease value (i.e., the target output power) is handled according to the principle of taking the smaller value. When multiple factors cause the battery pack to experience power limiting, such as pre-undervoltage, pre-overvoltage, power loop closure, or fault, the target output power of the battery pack corresponding to different factors is determined separately, and the minimum power among them is taken as the final target output power of the battery pack. The principle is that once the BMS (Battery Management System) triggers power limiting due to factors such as pre-undervoltage, pre-overvoltage, power loop closure, or fault, the allowable power of the battery pack (i.e., the target output power, including allowable charging power and allowable discharging power) should not be greater than the allowable power before the power limiting is triggered. Meanwhile, when power limiting is triggered due to factors such as pre-undervoltage, pre-overvoltage, power closed loop, or fault, the power regulation rate of the battery pack corresponding to different factors is determined by linear interpolation based on the power difference between the target output power and the actual power of the battery pack, and the maximum rate is taken as the power regulation rate of the battery pack.

[0036] Optionally, when the current power adjustment direction of the battery pack is downward, the target output power of the battery pack can be determined as follows: First, determine the lookup power of the battery pack and compare it with a preset lower limit power. If the lookup power is less than the preset lower limit power, the lookup power is determined as the first output power; if the lookup power is greater than or equal to the preset lower limit power, the preset lower limit power is determined as the first output power. Second, compare the minimum cell voltage, the preset undervoltage threshold, and the preset overvoltage threshold of the battery pack. If the minimum cell voltage is less than the preset undervoltage threshold, the preset lower limit power is determined as the second output power; if the minimum cell voltage is greater than or equal to the preset undervoltage threshold and less than the preset overvoltage threshold, the second output power is determined using the allowable power calculation formula. Finally, compare the first output power and the second output power, and determine the power corresponding to the smaller power value as the target output power of the battery pack. The allowable power calculation formula is:

[0037]

[0038] Among them, Vtg_0 Indicates the preset undervoltage threshold, Vtg _100 This indicates a preset overvoltage threshold. The preset lower limit power is set to 5kW to 8kW (kilowatts) according to the limp power request of the electric vehicle, ensuring that the electric vehicle can be moved to a safe area after a malfunction, thus reducing driving risks.

[0039] Optionally, limp power refers to the minimum power output allowed by the battery management system when an electric vehicle encounters certain non-fatal malfunctions or is under abnormal operating conditions. To ensure that the electric vehicle can remain in a limp state after a malfunction, the limp power can be set to 5kW to 8kW, ensuring that the electric vehicle can move to a safe area after a malfunction and reducing driving risks.

[0040] In one optional embodiment, determining the first output power of the battery pack based on the state of charge information and temperature information included in the operating status information, as well as a preset lower limit power, includes: obtaining the lookup power of the battery pack using a linear interpolation method based on the state of charge information and temperature information; determining the lookup power as the first output power when the lookup power is less than the preset lower limit power; or determining the preset lower limit power as the first output power when the lookup power is greater than or equal to the preset lower limit power.

[0041] Understandably, based on the battery pack's state of charge and temperature information, a linear interpolation method is used to determine the battery pack's lookup power by consulting a power table. The lookup power is then compared to a preset lower limit power. If the lookup power is less than the preset lower limit, it is determined as the first output power; otherwise, the preset lower limit power is determined as the first output power. By comparing the lookup power with the preset lower limit power, it is possible to maintain the battery pack's power output capacity as much as possible while ensuring safe operation, thus achieving a balance between safety and driving performance.

[0042] Optionally, the lookup power of the battery pack can be determined based on the power table and using linear interpolation. First, the power table is consulted based on the state of charge (SOC) and temperature information. The rows of this power table represent the SOC of the battery pack, and the columns represent the temperature. If the SOC and temperature information of the battery pack are exactly at a point in the power table, the lookup power corresponding to that point is determined as the lookup power. If the SOC and temperature information of the battery pack are not at a point in the power table, the lookup power of the nearest neighboring points is determined. Combining the SOC and temperature information of the battery pack with those of the nearest neighboring points, linear interpolation is used to determine the lookup power of the battery pack. Table 1 shows the power table for the battery pack. As shown in Table 1, the row elements represent the SOC of the battery pack, and the column elements represent the temperature information of the battery pack.

[0043] Table 1 Power meter of battery pack

[0044] 5％ 10％ 15％ 20％ …… 90％ 95％ 100％ 20 degrees Celsius 49 68 81 92 …… 156 156 156 25 degrees Celsius 58 100 125 150 …… 215 215 215 30 degrees Celsius 58 100 125 150 …… 215 215 215 35 degrees Celsius 58 100 125 150 …… 215 215 215 40 degrees Celsius 58 100 125 150 …… 215 215 215 45 degrees Celsius 58 100 125 150 …… 215 215 215 50 degrees Celsius 30 50 66 94 …… 112 112 112 55 degrees Celsius 25 30 40 47 …… 56 56 56

[0045] Optionally, the situation where the lookup power is less than the preset lower limit power typically occurs when the battery pack's state of charge and temperature are already very low, such that the output power it can provide according to its electrochemical characteristics is lower than the minimum power required for safe operation. In this case, the lookup power can be used as the first output power to limit the battery pack's power output and protect the battery from over-discharge or operation under unsafe conditions. When the lookup power is greater than or equal to the preset lower limit power, if the lookup power is high enough to at least meet the preset lower limit power requirement for safe operation, the preset lower limit power can be determined as the first output power. This ensures that even under adverse state of charge and temperature conditions, the battery pack can at least provide the preset lower limit power required to maintain safe operation of the battery pack, thus ensuring the safe operation of the electric vehicle.

[0046] In one optional embodiment, determining the second output power of the battery pack based on operating status information and a preset undervoltage threshold includes: determining the minimum cell voltage included in the operating status information, wherein the minimum cell voltage refers to the minimum voltage among the voltages corresponding to the multiple individual cells included in the battery pack; if the minimum cell voltage is less than the preset undervoltage threshold, determining the preset lower limit power as the second output power; or if the minimum cell voltage is greater than or equal to the preset undervoltage threshold and less than the preset overvoltage threshold, determining the second output power based on the operating status information, wherein the preset overvoltage threshold is used to determine whether the battery pack is in an overvoltage state, and the preset overvoltage threshold is greater than the preset undervoltage threshold.

[0047] It is understood that by comparing the minimum cell voltage, preset undervoltage threshold, and preset overvoltage threshold included in the battery pack's operating status information, if the minimum cell voltage is less than the preset undervoltage threshold, the preset lower limit power is determined as the second output power; if the minimum cell voltage is greater than or equal to the preset undervoltage threshold and less than the preset overvoltage threshold, the second output power is determined based on the battery pack's operating status information. The aforementioned minimum cell voltage refers to the minimum voltage among the voltages corresponding to the multiple individual cells in the battery pack. The preset overvoltage threshold is used to determine whether the battery pack is in an overvoltage state, and the preset overvoltage threshold is greater than the preset undervoltage threshold. By comparing the battery pack's minimum cell voltage with the preset undervoltage and overvoltage thresholds, early warnings of undervoltage and overvoltage risks can be provided, preventing the battery pack from entering an unsafe state, reducing the frequency of fault alarms, and improving power adjustment effectiveness.

[0048] Optionally, if the minimum cell voltage is less than the preset undervoltage threshold, it indicates that the battery pack is in an undervoltage state, which is usually caused by deep battery discharge or a rapid voltage drop. In this case, the preset lower limit power can be set as the second output power to prevent undervoltage faults from occurring.

[0049] In one optional embodiment, determining the target output power of the battery pack based on operating status information and the current power adjustment direction includes: when the current power adjustment direction is upward, determining the minimum cell voltage included in the operating status information, wherein the minimum cell voltage refers to the minimum voltage among the voltages corresponding to the multiple individual cells included in the battery pack; when the minimum cell voltage is greater than or equal to a preset overvoltage threshold, obtaining a lookup table power using linear interpolation based on the state of charge information and temperature information included in the operating status information, and determining the lookup table power as the target output power, wherein the preset overvoltage threshold is used to determine whether the battery pack is in an overvoltage state; or when the minimum cell voltage is less than the preset overvoltage threshold and the minimum cell voltage is greater than or equal to a preset undervoltage threshold, determining a second output power based on the operating status information, and determining the second output power as the target output power, wherein the preset undervoltage threshold is used to determine whether the battery pack is in an undervoltage state.

[0050] It is understandable that when the current power adjustment direction of the battery pack is upward, the minimum cell voltage of the battery pack is first compared with the preset overvoltage threshold and the preset undervoltage threshold. If the minimum cell voltage is greater than or equal to the preset overvoltage threshold, then based on the battery pack's state of charge information and temperature information, combined with the power meter, a linear interpolation method is used to obtain the battery pack's lookup power, and this lookup power is determined as the target output power of the battery pack. If the minimum cell voltage is less than the preset overvoltage threshold but greater than or equal to the preset undervoltage threshold, then based on the battery pack's operating status information, the second output power of the battery pack is determined, and this second output power is determined as the target output power of the battery pack. Through the above process, the power adjustment process of the battery pack can be made smoother, avoiding sudden voltage changes caused by power abrupt changes, thereby improving the power adjustment effect and maintaining the safe and stable operation of the battery pack.

[0051] Optionally, when the current power adjustment direction of the battery pack is upward, if the minimum cell voltage of the battery pack is greater than or equal to a preset overvoltage threshold, it indicates that the battery pack is on the verge of overvoltage risk. At this time, the output power of the battery pack will no longer be allowed to be further increased. Instead, based on the battery pack's state of charge and temperature information, combined with the power meter, a linear interpolation method is used to determine the target output power of the battery pack. This target output power can ensure that even during the power increase process, the battery pack will not exceed the safe voltage range, avoiding the triggering of the overvoltage protection mechanism.

[0052] In one optional embodiment, determining the second output power based on operating status information includes: obtaining the lookup power of the battery pack using linear interpolation based on state of charge information and temperature information; and determining the second output power based on the lookup power, minimum cell voltage, preset undervoltage threshold, preset lower limit power, and preset overvoltage threshold.

[0053] It is understandable that when the minimum cell voltage is greater than or equal to the preset undervoltage threshold and less than the preset overvoltage threshold, the second output power of the battery pack can be determined as follows: First, based on the battery pack's state of charge and temperature information, and in conjunction with the power meter, a linear interpolation method is used to determine the battery pack's lookup power. Then, based on the lookup power, the battery pack's minimum cell voltage, the preset undervoltage threshold, the preset lower limit power, and the preset overvoltage threshold, the battery pack's second output power is determined. By using linear interpolation to determine the lookup power, and then dynamically adjusting the second output power based on the current minimum cell voltage, preset thresholds (including the preset undervoltage and overvoltage thresholds), and the preset lower limit power, the actual power output capability of the battery pack can be more accurately matched, thereby optimizing the battery pack's energy utilization efficiency and improving the battery pack's power adjustment effect.

[0054] Optionally, the target output power of the battery pack can be dynamically adjusted based on the lookup power, minimum cell voltage, preset undervoltage threshold, preset lower limit power, and preset overvoltage threshold. This allows the battery pack to linearly adjust the second output power based on the difference between the minimum cell voltage and the preset undervoltage threshold, ensuring that the output power is as close as possible to the lookup power without triggering the undervoltage or overvoltage protection mechanism.

[0055] Step S106: Determine the power regulation rate of the battery pack based on the target output power;

[0056] It is understandable that the power regulation rate of the battery pack is determined based on the target output power of the battery pack and its operating status information. By accurately calculating the power regulation rate, smooth changes in the power output of the battery pack can be achieved, avoiding sudden power fluctuations, reducing the impact on the battery pack, improving the operational stability and reliability of the electric vehicle, and thus enhancing the power regulation effect of the battery pack.

[0057] In one optional embodiment, determining the power regulation rate of the battery pack based on the target output power includes: determining the power difference of the battery pack based on the actual power of the battery pack included in the operating status information and the target output power; and determining the power regulation rate based on the power difference.

[0058] It can be understood that the difference between the actual power and the target output power of the battery pack, as included in the operating status information, is used to obtain the power difference value of the battery pack. Based on this power difference value, the power regulation rate of the battery pack is determined. Adjusting the power regulation rate can ensure a smooth transition of the battery pack during power changes, avoid sudden changes in power output, reduce damage to the battery pack, improve the power regulation effect of the battery pack, and at the same time improve the comfort and safety of the user's driving process.

[0059] Optionally, for the power regulation rate of the battery pack, when the power is reduced, the power regulation rate of the battery pack is adjusted by linear interpolation based on the power difference. The lower the voltage of the individual cell, the faster the reduction rate. When the power is increased, the power regulation rate of the battery pack is adjusted by linear interpolation based on the power difference. The higher the voltage of the individual cell, the faster the increase rate.

[0060] Optionally, when the front power adjustment direction of the battery pack is downward, the power regulation rate can be determined as follows: First, the power regulation rate range of the battery pack is predetermined based on the battery pack's operating status information. Second, a first power difference and a second power difference of the battery pack are determined based on the first output power and the second output power of the battery pack, respectively. Next, based on the first power difference and the second power difference, and in conjunction with the power regulation rate range, linear interpolation is used to determine the first power regulation rate and the second power regulation rate of the battery pack. Finally, the first power regulation rate and the second power regulation rate are compared, and the larger one is determined as the power regulation rate of the battery pack.

[0061] Optionally, when the front power adjustment direction of the battery pack is upward, the power regulation rate can be determined as follows: First, the power regulation rate range of the battery pack is predetermined based on the battery pack's operating status information. Second, the power difference of the battery pack is determined based on the target output power of the battery pack. Next, based on the aforementioned power difference and the power regulation rate range, linear interpolation is used to determine the power regulation rate of the battery pack.

[0062] Optionally, the real-time power difference of the battery pack can be determined based on the actual real-time power and the target real-time output power. Based on this power difference, the power regulation rate of the battery pack can be adjusted in real-time, thereby improving the smoothness of power changes and enhancing the power regulation effect. First, the time interval for sampling the battery pack's operating information is determined. At each sampling time, the battery pack's operating status information and power adjustment direction are collected. Based on the operating status information and power adjustment direction, the target output power and power regulation rate of the battery pack are determined. At the next sampling time, the target output power and power regulation rate of the battery pack are updated based on the new operating status information and power adjustment direction. By updating the target output power and power regulation rate of the battery pack at different sampling times, sudden power changes in the battery pack can be avoided, making the power output process of the battery pack smoother, reducing battery aging, and improving the user's driving experience.

[0063] Step S108: Adjust the power of the battery pack based on the target output power and the power regulation rate.

[0064] It is understandable that the power of the battery pack is adjusted based on the determined target output power and power regulation rate. This power adjustment, based on the target output power and power regulation rate, not only optimizes the power output characteristics of the battery pack but also improves the operating efficiency and user experience of the electric vehicle.

[0065] Figure 2 This is a first schematic diagram of an optional power adjustment method for a battery pack according to an embodiment of this application, as shown below. Figure 2 The diagram illustrates how a method from related technologies is used to adjust the target output power of a battery pack. When the cell voltage drops to a certain level, the allowable power of the battery pack (i.e., the target output power) drops sharply to 0.8 times the lookup table power, and consequently, the actual power of the battery pack (i.e., the actual power of the vehicle) also drops sharply to 0.8 times the lookup table power. Then, due to power limitations, the allowable power and actual power remain unchanged. Even if the cell voltage continues to drop, the allowable power and actual power remain at 0.8 times the lookup table power, ultimately causing the cell voltage to drop below a preset undervoltage threshold, triggering an undervoltage warning. Figure 2 The power adjustment method shown not only causes a sudden drop in power, which can severely damage the battery, but also, because the actual power remains constant at 0.8 times the power shown in the table, the downward trend in cell voltage is not alleviated, leading to undervoltage in the battery pack and triggering an undervoltage warning. This not only damages the health of the battery pack but also reduces the user's driving experience.

[0066] Figure 3This is a second schematic diagram of an optional power adjustment method for a battery pack according to an embodiment of this application, as shown below. Figure 3 The diagram illustrates the adjustment of the target output power of the battery pack using the power adjustment method of this embodiment. When the cell voltage drops to a preset overvoltage threshold, the allowable power of the battery pack begins to decrease along with the cell voltage, thereby gradually reducing the actual power of the battery pack. The rate of decrease in both allowable and actual power is comparable to the rate of decrease in cell voltage, resulting in a smooth change in both allowable and actual power. Furthermore, because the changes in cell voltage and actual power are consistent, undervoltage conditions in the battery pack are avoided. When the cell voltage stabilizes, the allowable and actual power also essentially cease to change and stabilize. When cell polarization is eliminated, the cell voltage begins to rise, and the allowable power also begins to rise accordingly, at a rate comparable to the rise in the cell voltage. However, the actual power is relatively small, resulting in a larger power difference. Therefore, when the cell voltage rebounds, i.e., when the cell voltage begins to rise, the actual power also begins to rise, and the rate of increase is greater than the rate of increase of both the cell voltage and the allowable power, allowing for rapid power regulation of the battery pack. As the power difference gradually narrows, the rate of increase of the actual power also begins to decrease. Throughout the entire power increase process, the rate of increase of the allowable power of the battery pack is comparable to the rate of increase of the cell voltage, resulting in a smooth change in the allowable power of the battery pack and avoiding sudden increases or decreases in power.

[0067] Through the above steps S102 to S108, the goal of collecting the operating status information of the battery pack and determining the target output power and power adjustment rate of the battery pack can be achieved. Then, the power of the battery pack can be adjusted according to the target output power and power adjustment rate, thereby improving the power adjustment effect of the battery pack and solving the technical problem of unsatisfactory power adjustment effect of the battery pack in related technologies.

[0068] Based on the above embodiments and optional embodiments, this application proposes an implementation method for an optional power adjustment method for a battery pack, which can be understood as a method for a closed-loop threshold strategy for power battery packs.

[0069] Traditional battery pack protection threshold strategies reduce power in stages with a fixed coefficient. This can easily lead to fault alarms under adverse conditions such as low cell voltage or multiple voltage spikes in the electric vehicle. The aforementioned closed-loop power threshold strategy for power battery packs adjusts the target output power of the battery pack according to the dynamic changes in cell voltage, achieving a smooth and stable reduction in the target output power. This prevents sudden changes in battery pack power and voltage, improves the user's driving experience, and reduces fault alarms.

[0070] Figure 4This is a third schematic diagram of an optional power adjustment method for a battery pack according to an embodiment of this application, as shown below. Figure 4 As shown, the left side illustrates the method used in related technologies to reduce the allowable power (i.e., the target output power of the battery pack). The right side illustrates the method used in the power pack power closed-loop threshold strategy to reduce the allowable power of the battery pack. When reducing the allowable power of the battery pack using the methods in related technologies, a sudden power drop occurs, and after reaching a certain power value, the allowable power of the battery pack no longer changes, triggering a fault warning and causing a driving jerk sensation for the user. Furthermore, if the initial actual power is high, it is difficult to control through several power limiting stages. Due to the high terminal resistance and large polarization, the voltage drop trend is not alleviated, and undervoltage faults may even occur, affecting the battery pack's lifespan. When reducing the allowable power of the battery pack using the power pack power closed-loop threshold strategy, the allowable power of the battery pack decreases synchronously with the cell voltage, without lag or sudden power drop. This solves the problems of triggering fault warnings and causing a driving jerk sensation for the user, thus promoting the safe and stable operation of the battery pack.

[0071] The apparent reason for the undervoltage phenomenon in electric vehicles operating at low SOC is that the cell voltage drops rapidly while the power drops slowly, leading to undervoltage. The deeper underlying reason is that under the current temperature and SOC conditions, due to historical discharge conditions, the actual discharge capacity of the battery pack is less than the lookup table value. In other words, the maximum target output power that the battery pack can provide during discharge is less than the lookup table power obtained by looking up the table.

[0072] When multiple factors simultaneously trigger power limiting (i.e., the current power adjustment direction of the battery pack is downward), the power decrease rate of the battery pack is handled according to the principle of taking the larger value, while the target power decrease value (i.e., the target output power) is handled according to the principle of taking the smaller value. When multiple factors cause the battery pack to experience power limiting, such as pre-undervoltage, pre-overvoltage, power loop closure, or fault, the target output power of the battery pack corresponding to different factors is determined separately, and the minimum power is taken as the final target output power of the battery pack. The principle is that once the BMS triggers power limiting due to factors such as pre-undervoltage, pre-overvoltage, power loop closure, or fault, the allowable power of the battery pack (including allowable charging power and allowable discharging power) should not be greater than the allowable power before the power limiting is triggered. At the same time, when power limiting is triggered due to factors such as pre-undervoltage, pre-overvoltage, power loop closure, or fault, the power adjustment rate of the battery pack corresponding to different factors is determined by linear interpolation based on the power difference between different target output powers and the actual power of the battery pack, and the maximum rate is taken as the power adjustment rate of the battery pack.

[0073] When the current power adjustment direction of the battery pack is downward, the target output power of the battery pack is determined as follows: First, determine the lookup power of the battery pack and compare it with the preset lower limit power. If the lookup power is less than the preset lower limit power, the lookup power is determined as the first output power; if the lookup power is greater than or equal to the preset lower limit power, the preset lower limit power is determined as the first output power. Second, compare the minimum cell voltage, the preset undervoltage threshold, and the preset overvoltage threshold of the battery pack. If the minimum cell voltage is less than the preset undervoltage threshold, the preset lower limit power is determined as the second output power; if the minimum cell voltage is greater than or equal to the preset undervoltage threshold and less than the preset overvoltage threshold, the second output power is determined using the allowable power calculation formula. Finally, compare the first output power and the second output power, and determine the power corresponding to the smaller power value as the target output power of the battery pack. The allowable power calculation formula is:

[0074]

[0075] Among them, Vtg _0 Indicates the preset undervoltage threshold, Vtg _100 This indicates a preset overvoltage threshold. The preset lower limit power is set to 5kW to 8kW according to the limp power request of the electric vehicle, ensuring that the electric vehicle can be moved to a safe area after a malfunction, thus reducing driving risks.

[0076] When the current power adjustment direction of the battery pack is upward, the target output power of the battery pack is obtained by linear interpolation based on the minimum cell voltage of the battery pack and the power meter, or by calculation using the allowable power calculation formula. Simultaneously, when the current power adjustment direction of the battery pack is upward, the power regulation rate of the battery pack is obtained by linear interpolation based on the power difference between the target output power and the actual power of the battery pack.

[0077] When the current power adjustment direction of the battery pack is downward, the target output power of the battery pack is determined as follows: The minimum cell voltage of the battery pack is compared with the preset overvoltage threshold and the preset undervoltage threshold. If the minimum cell voltage is greater than or equal to the preset overvoltage threshold, the lookup power of the battery pack is obtained by linear interpolation based on the state of charge information and temperature information of the battery pack, combined with the power table, and this lookup power is determined as the target output power of the battery pack. If the minimum cell voltage is less than the preset overvoltage threshold and greater than or equal to the preset undervoltage threshold, the target output power of the battery pack is determined by using the allowable power calculation formula.

[0078] Regarding the power regulation rate of the battery pack, when the power is reduced, the power regulation rate of the battery pack is adjusted by linear interpolation based on the power difference. The lower the voltage of the individual cell, the faster the reduction rate. When the power is increased, the power regulation rate of the battery pack is adjusted by linear interpolation based on the power difference. The higher the voltage of the individual cell, the faster the increase rate.

[0079] Using the above method, the target output power of the electric vehicle's battery pack is dynamically adjusted according to changes in cell voltage during actual use. When the cell voltage decreases, the target output power exhibits a linear decreasing trend; conversely, when the cell voltage increases, the target output power exhibits a linear increasing trend. This allows the target output power to decrease smoothly at low SOC levels, preventing sudden changes in power and voltage, avoiding frequent fault alarms during electric vehicle operation, and minimizing driving jerking and other adverse driving experiences for users.

[0080] The above optional implementation methods achieve at least the following effects: by incorporating a preset undervoltage threshold into power adjustment, it ensures that the battery pack will not exceed the safe operating range even under extreme conditions, effectively preventing undervoltage faults and improving the rationality and stability of battery pack power adjustment; by comparing the minimum cell voltage of the battery pack with the preset undervoltage threshold and the preset overvoltage threshold, it can provide early warning of undervoltage and overvoltage risks of the battery pack, preventing the battery pack from entering an unsafe state, reducing the frequency of fault alarms, and improving the power adjustment effect; the adjustment of the power adjustment rate can ensure a smooth transition of the battery pack during power changes, avoiding sudden changes in power output, reducing damage to the battery pack, improving the power adjustment effect of the battery pack, and simultaneously improving the comfort and safety of the user's driving process.

[0081] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0082] This embodiment also provides a power adjustment device for a battery pack, which is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the terms "module" and "device" can refer to a combination of software and / or hardware that performs a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, hardware implementations, or a combination of software and hardware, are also possible and contemplated.

[0083] According to an embodiment of this application, an apparatus embodiment for implementing a power adjustment method for a battery pack is also provided. Figure 5 This is a schematic diagram of a power adjustment device for a battery pack according to an embodiment of this application, as shown below. Figure 5As shown, the power adjustment device for the battery pack includes an information acquisition module 502, a first determination module 504, a second determination module 506, and a power adjustment module 508. The device will be described below.

[0084] The information acquisition module 502 is used to acquire the operating status information and current power adjustment direction of the battery pack at the current sampling time;

[0085] The first determining module 504, connected to the information acquisition module 502, is used to determine the target output power of the battery pack based on the operating status information and the current power adjustment direction.

[0086] The second determining module 506, connected to the first determining module 504, is used to determine the power regulation rate of the battery pack based on the target output power.

[0087] The power adjustment module 508, connected to the second determination module 506, is used to adjust the power of the battery pack based on the target output power and the power adjustment rate.

[0088] This application provides a power adjustment device for a battery pack. An information acquisition module 502 is used to acquire the battery pack's operating status information and current power adjustment direction at the current sampling time. A first determination module 504, connected to the information acquisition module 502, is used to determine the target output power of the battery pack based on the operating status information and the current power adjustment direction. A second determination module 506, connected to the first determination module 504, is used to determine the power adjustment rate of the battery pack based on the target output power. A power adjustment module 508, connected to the second determination module 506, is used to adjust the power of the battery pack based on the target output power and the power adjustment rate. This achieves the goal of acquiring the battery pack's operating status information, determining the target output power and power adjustment rate, and then adjusting the battery pack's power according to the target output power and power adjustment rate. This improves the power adjustment effect of the battery pack and solves the technical problem of unsatisfactory power adjustment effects in related technologies.

[0089] It should be noted that the above modules can be implemented by software or hardware. For example, for the latter, it can be implemented in the following ways: the above modules can be located in the same processor; or the above modules can be located in different processors in any combination.

[0090] It should be noted that the information acquisition module 502, the first determination module 504, the second determination module 506, and the power adjustment module 508 mentioned above correspond to steps S102 to S108 in the embodiments. The instances and application scenarios implemented by the above modules and corresponding steps are the same, but are not limited to the content disclosed in the above embodiments. It should be noted that the above modules, as part of the device, can run in a computer terminal.

[0091] It should be noted that the optional or preferred implementation methods of this embodiment can be found in the relevant descriptions in the embodiments, and will not be repeated here.

[0092] The power adjustment device of the battery pack may also include a processor and a memory. The information acquisition module 502, the first determination module 504, the second determination module 506, the power adjustment module 508, etc. are all stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to realize the corresponding functions.

[0093] The processor contains a core that retrieves the corresponding program unit from memory. One or more cores may be configured. Memory may include non-persistent memory in computer-readable media, random access memory (RAM), and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory includes at least one memory chip.

[0094] This application provides a non-volatile storage medium storing a program that, when executed by a processor, implements a power adjustment method for a battery pack.

[0095] This application provides an electronic device including a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs the following steps: acquiring the operating status information and current power adjustment direction of a battery pack at the current sampling time; determining the target output power of the battery pack based on the operating status information and the current power adjustment direction; determining the power regulation rate of the battery pack based on the target output power; and adjusting the power of the battery pack based on the target output power and the power regulation rate. The device described herein may be a server, PC, etc.

[0096] This application also provides a computer program product, which, when executed on a data processing device, is suitable for executing an initialization program having the following method steps: acquiring the operating status information and current power adjustment direction of the battery pack at the current sampling time; determining the target output power of the battery pack based on the operating status information and the current power adjustment direction; determining the power regulation rate of the battery pack based on the target output power; and adjusting the power of the battery pack based on the target output power and the power regulation rate.

[0097] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application 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.

[0098] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. 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 processor, 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... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0099] 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.

[0100] 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.

[0101] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0102] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0103] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0104] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0105] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application 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.

[0106] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for adjusting the power of a battery pack, characterized in that, include: Collect the battery pack's operating status information and current power adjustment direction at the current sampling time; Based on the operating status information and the current power adjustment direction, the target output power of the battery pack is determined; Based on the target output power, determine the power regulation rate of the battery pack; Based on the target output power and the power regulation rate, the power of the battery pack is adjusted; The step of determining the target output power of the battery pack based on the operating status information and the current power adjustment direction includes: when the current power adjustment direction is downward, determining a first output power of the battery pack based on the state of charge information and temperature information included in the operating status information, and a preset lower limit power; determining a second output power of the battery pack based on the operating status information and a preset undervoltage threshold, wherein the preset undervoltage threshold is used to determine whether the battery pack is in an undervoltage state; and determining the smaller power value between the first output power and the second output power as the target output power. When the current power adjustment direction is upward, the minimum cell voltage included in the operating status information is determined, wherein the minimum cell voltage refers to the minimum voltage among the voltages corresponding to the multiple individual cells included in the battery pack; when the minimum cell voltage is greater than or equal to a preset overvoltage threshold, based on the state of charge information and temperature information included in the operating status information, a lookup table power is obtained using linear interpolation, and the lookup table power is determined as the target output power, wherein the preset overvoltage threshold is used to determine whether the battery pack is in an overvoltage state; or, when the minimum cell voltage is less than the preset overvoltage threshold and the minimum cell voltage is greater than or equal to a preset undervoltage threshold, a second output power is determined based on the operating status information, and the second output power is determined as the target output power, wherein the preset undervoltage threshold is used to determine whether the battery pack is in an undervoltage state.

2. The method according to claim 1, characterized in that, The step of determining the first output power of the battery pack based on the state of charge information and temperature information included in the operating status information, as well as the preset lower power limit, includes: Based on the state of charge information and the temperature information, the lookup power of the battery pack is obtained by using linear interpolation. If the lookup power is less than the preset lower limit power, the lookup power is determined as the first output power; or If the power obtained from the lookup table is greater than or equal to the preset lower limit power, the preset lower limit power is determined as the first output power.

3. The method according to claim 1, characterized in that, The step of determining the second output power of the battery pack based on the operating status information and a preset undervoltage threshold includes: Determine the minimum cell voltage included in the operating status information, wherein the minimum cell voltage refers to the minimum voltage among the voltages corresponding to the multiple individual cells included in the battery pack; If the minimum cell voltage is less than the preset undervoltage threshold, the preset lower limit power is determined as the second output power; or When the minimum cell voltage is greater than or equal to the preset undervoltage threshold and the minimum cell voltage is less than the preset overvoltage threshold, the second output power is determined based on the operating status information, wherein the preset overvoltage threshold is used to determine whether the battery pack is in an overvoltage state, and the preset overvoltage threshold is greater than the preset undervoltage threshold.

4. The method according to claim 1 or 3, characterized in that, Determining the second output power based on the operating status information includes: Based on the state of charge information and the temperature information, the lookup power of the battery pack is obtained by using linear interpolation. The second output power is determined based on the lookup power, the minimum cell voltage, the preset undervoltage threshold, the preset lower limit power, and the preset overvoltage threshold.

5. The method according to any one of claims 1 to 3, characterized in that, Determining the power regulation rate of the battery pack based on the target output power includes: Based on the actual power of the battery pack included in the operating status information and the target output power, the power difference of the battery pack is determined; The power adjustment rate is determined based on the power difference.

6. A power adjustment device for a battery pack, characterized in that, include: The information acquisition module is used to collect the battery pack's operating status information and current power adjustment direction at the current sampling time; The first determining module is used to determine the target output power of the battery pack based on the operating status information and the current power adjustment direction; The second determining module is used to determine the power regulation rate of the battery pack based on the target output power; A power adjustment module is used to adjust the power of the battery pack based on the target output power and the power adjustment rate. The first determining module is further configured to: when the current power adjustment direction is downward, determine the first output power of the battery pack based on the state of charge information and temperature information included in the operating status information, and a preset lower limit power; determine the second output power of the battery pack based on the operating status information and a preset undervoltage threshold, wherein the preset undervoltage threshold is used to determine whether the battery pack is in an undervoltage state; and determine the smaller power value between the first output power and the second output power as the target output power; When the current power adjustment direction is upward, the minimum cell voltage included in the operating status information is determined, wherein the minimum cell voltage refers to the minimum voltage among the voltages corresponding to the multiple individual cells included in the battery pack; when the minimum cell voltage is greater than or equal to a preset overvoltage threshold, based on the state of charge information and temperature information included in the operating status information, a lookup table power is obtained using linear interpolation, and the lookup table power is determined as the target output power, wherein the preset overvoltage threshold is used to determine whether the battery pack is in an overvoltage state; or, when the minimum cell voltage is less than the preset overvoltage threshold and the minimum cell voltage is greater than or equal to a preset undervoltage threshold, a second output power is determined based on the operating status information, and the second output power is determined as the target output power, wherein the preset undervoltage threshold is used to determine whether the battery pack is in an undervoltage state.

7. A non-volatile storage medium, characterized in that, The non-volatile storage medium stores multiple instructions adapted for loading by a processor and executing the power adjustment method of the battery pack according to any one of claims 1 to 5.

8. An electronic device, characterized in that, include: One or more processors and a memory, the memory being used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors cause the one or more processors to implement the power adjustment method of the battery pack according to any one of claims 1 to 5.

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