Battery pack SOC correction control method and device

Abstract

The invention discloses a battery pack SOC correction control method and device. The method comprises the following steps: acquiring a first capacity threshold value, a second capacity threshold value, a battery pack SOC at a power-off moment, a platform area range and an operation throughput of the battery pack; if the operation throughput is greater than or equal to the first capacity threshold and less than the second capacity threshold, correcting the SOC of the battery pack when the battery pack is in a full charge state; if the operation throughput is greater than or equal to the second capacity threshold, judging whether the SOC of the battery pack at the power-off moment is within the platform area range or not; if the SOC of the battery pack at the power-off moment is within the platform area range, discharging the battery pack to a non-platform area and correcting the SOC of the battery pack; and if the SOC of the battery pack at the power-off moment is out of the platform area range, correcting the SOC of the battery pack. Through the method, the SOC estimation error of the battery pack can be eliminated, and the SOC estimation precision of the battery pack is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery packs, and in particular to a battery pack SOC correction control method and device. Background Art

[0002] Lithium iron phosphate batteries have been widely used in the field of electric vehicles due to their high safety, long life and relatively low cost. However, the accuracy of the state of charge estimation of lithium iron phosphate batteries has always been a challenge, especially within a specific power range.

[0003] The state of charge estimation method based on OCV (Open Circuit Voltage) is a commonly used battery state estimation technology. After continuous charge and discharge, the voltage value measured after the battery current returns to zero and the battery voltage fully rebounds is the OCV.

[0004] There is an inherent relationship between OCV and SOC (State of charge), which can be calibrated through experimental data and plotted into an OCV-SOC curve. For different types of batteries, the characteristics of their OCV-SOC curves are different. The OCV-SOC curve of the lithium iron phosphate battery varies greatly in the two end areas (such as SOC <25% and SOC>95%), but is relatively flat in the middle area (such as SOC between 30% and 90%), which means that the middle area of ​​SOC is the platform area of ​​the lithium iron phosphate battery. Even if the SOC changes greatly in the platform area, the change in OCV may be small, resulting in a large error in the battery's SOC estimation and a low accuracy in the battery's SOC estimation. Summary of the invention

[0005] The present invention provides a battery pack SOC correction control method and device to eliminate the battery pack SOC estimation error and improve the battery pack SOC estimation accuracy.

[0006] According to one aspect of the present invention, a battery pack SOC correction control method is provided, the battery pack comprising a plurality of lithium-ion batteries; the battery pack SOC correction control method comprises:

[0007] Obtain a first capacity threshold, a second capacity threshold, the battery pack SOC at the time of power-off, a platform area range, and an operating throughput of the battery pack; wherein the first capacity threshold and the second capacity threshold are both preset operating throughput threshold values, the first capacity threshold is less than the second capacity threshold, and the operating throughput is the sum of the accumulated charging and discharging power of the battery pack when it is operating in the platform area from the last time the battery pack SOC is corrected to the current power-off of the power-consuming device; the platform area range is the SOC range of the battery pack in the platform area; the battery pack SOC at the time of power-off is the battery pack SOC of the power-consuming device when it is powered off this time;

[0008] If the operation throughput is greater than or equal to the first capacity threshold and less than the second capacity threshold, correcting the battery pack SOC when the battery pack is in a fully charged state;

[0009] If the operation throughput is greater than or equal to the second capacity threshold, determining whether the battery pack SOC at the power-off time is within the platform area;

[0010] If the battery pack SOC at the power-off time is within the platform area, discharging the battery pack to the non-platform area and correcting the battery pack SOC;

[0011] If the battery pack SOC at the power-off moment is outside the platform area, the battery pack SOC is corrected.

[0012] Optionally, the platform area range includes: an interval close to a non-platform area, the interval close to the non-platform area is an SOC interval with a minimum boundary value of the platform area range as an interval minimum value, and the interval maximum value of the interval close to the non-platform area is less than the maximum boundary value of the platform area range; before discharging the battery pack to the non-platform area and correcting the SOC of the battery pack, it also includes:

[0013] Determining whether the battery pack SOC at the power-off time is within the close-to-non-platform region;

[0014] If the battery pack SOC at the power-off time is within the range close to the non-platform region, the battery pack is discharged to the non-platform region and the battery pack SOC is corrected;

[0015] If the SOC of the battery pack at the power-off time is outside the near-non-platform range, the battery pack is controlled to hibernate.

[0016] Optionally, the platform area range includes: a common platform area interval, the common platform area interval is an SOC interval with a maximum boundary value of the platform area range as an interval maximum value, and a minimum interval value of the common platform area interval is greater than a minimum boundary value of the platform area range; before determining whether the battery pack SOC at the power-off moment is within the platform area range, it also includes:

[0017] Determining whether the battery pack SOC at the power-off moment is within the normal platform range;

[0018] If the SOC of the battery pack at the power-off time is within the normal platform range, controlling the battery pack to hibernate;

[0019] If the battery pack SOC at the power-off time is outside the normal platform range, it is determined whether the battery pack SOC at the power-off time is within the platform range.

[0020] Optionally, the specific method of discharging the battery pack includes:

[0021] Obtaining the current temperature of the battery pack and the optimal temperature range of the battery pack;

[0022] If the current temperature is less than a minimum value of the optimal temperature range of the battery pack, heating the battery pack to consume the electric energy of the battery pack;

[0023] If the current temperature is greater than the maximum value of the optimal temperature range of the battery pack, cooling the battery pack to consume the electric energy of the battery pack;

[0024] If the current temperature is greater than or equal to a minimum value of the optimal temperature range of the battery pack and less than or equal to a maximum value of the optimal temperature range of the battery pack, a heating and cooling cycle is performed on the battery pack to consume electrical energy of the battery pack.

[0025] Optionally, the specific method for correcting the battery pack SOC includes:

[0026] Obtaining an open circuit voltage of the battery pack and an OCV-SOC curve of the battery pack;

[0027] Determining the actual SOC of the battery pack at a current moment according to the open circuit voltage of the battery pack and the OCV-SOC curve of the battery pack;

[0028] The actual SOC of the battery pack at the current moment is used as the battery pack SOC of the battery pack at the current moment.

[0029] Optionally, the specific method for correcting the SOC of the battery pack when the battery pack is in a fully charged state includes:

[0030] Prompting the user to fully charge the battery pack;

[0031] If the user fully charges the battery pack, the SOC of the battery pack when it is in a fully charged state is assigned to 100% to correct the SOC of the battery pack when it is in a fully charged state;

[0032] If the user has not fully charged the battery pack, continue to prompt the user to fully charge the battery pack.

[0033] Optionally, the specific method of discharging the battery pack to a non-platform region and correcting the SOC of the battery pack includes:

[0034] The battery pack is discharged within a preset time, and the SOC of the battery pack is corrected when the SOC of the battery pack is less than or equal to a minimum boundary value of the platform area.

[0035] Optionally, the specific method of discharging the battery pack within a preset time includes:

[0036] Get the current time and the preset time;

[0037] Calculate the timing duration according to the current time and the preset time and perform a countdown;

[0038] After the countdown of the timing duration ends, the battery pack is discharged.

[0039] Optionally, after the battery pack SOC is corrected, the method further includes:

[0040] Clears the running throughput to zero.

[0041] According to another aspect of the present invention, a battery pack SOC correction control device is further provided, the battery pack SOC correction control device comprising:

[0042] An acquisition module is used to acquire a first capacity threshold, a second capacity threshold, a battery pack SOC at the time of power-off, a platform area range, and an operating throughput of the battery pack; wherein the first capacity threshold and the second capacity threshold are both preset operating throughput threshold values, the first capacity threshold is less than the second capacity threshold, and the operating throughput is the sum of the accumulated charging and discharging power of the battery pack when it is operating in the platform area from the last time the battery pack SOC is corrected to the current power-off of the power-consuming device; the platform area range is the SOC range of the battery pack in the platform area; the battery pack SOC at the time of power-off is the battery pack SOC of the power-consuming device when it is powered off this time;

[0043] a full-charge correction module, configured to correct the SOC of the battery pack when the battery pack is in a fully-charged state if the operating throughput is greater than or equal to the first capacity threshold and less than the second capacity threshold;

[0044] A correction judgment module is used to judge whether the battery pack SOC at the power-off moment is within the platform area if the operation throughput is greater than or equal to the second capacity threshold;

[0045] A first correction module, configured to discharge the battery pack to a non-platform area and correct the battery pack SOC if the battery pack SOC at the power-off moment is within the platform area;

[0046] The second correction module is used to correct the battery pack SOC if the battery pack SOC at the power-off moment is outside the platform area.

[0047] According to another aspect of the present invention, there is also provided an electronic device, the electronic device comprising:

[0048] at least one processor; and

[0049] a memory communicatively connected to the at least one processor; wherein,

[0050] The memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the battery pack SOC correction control method described in any of the above embodiments.

[0051] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the battery pack SOC correction control method described in any of the above embodiments when executed.

[0052] The embodiment of the present invention determines whether the battery pack SOC needs to be corrected by the operating throughput, the first capacity threshold and the second capacity threshold of the battery pack; when the operating throughput is greater than or equal to the first capacity threshold and less than the second capacity threshold, the battery pack SOC is corrected when the battery pack is in a fully charged state; when the operating throughput is greater than or equal to the second capacity threshold, whether the battery pack is in the platform area is determined according to the battery pack SOC at the time of power-off and the platform area range; when the battery pack is in the platform area, the battery pack is discharged to place the battery pack in the non-platform area, and the battery pack SOC is corrected. The embodiment of the present invention determines whether the battery pack SOC needs to be corrected by the accumulated operating throughput of the battery pack, and controls the battery pack SOC to be in the non-platform area when the battery pack SOC needs to be corrected to achieve the correction of the battery pack SOC, which is conducive to eliminating the battery pack SOC estimation error and improving the estimation accuracy of the battery pack SOC.

[0053] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0055] Figure 1 is a flow chart of a battery pack SOC correction control method provided by Embodiment 1 of the present invention;

[0056] Figure 2 is a graph of an open circuit voltage-state of charge curve provided by an embodiment of the present invention;

[0057] Figure 3 is a flow chart of a battery pack SOC correction control method provided by Embodiment 2 of the present invention;

[0058] Figure 4 is a flow chart of a battery pack SOC correction control method provided by Embodiment 3 of the present invention;

[0059] Figure 5 is a flow chart of a battery pack SOC correction control method provided by Embodiment 4 of the present invention;

[0060] Figure 6 is a flow chart of a battery pack SOC correction control method provided by Embodiment 5 of the present invention;

[0061] Figure 7 is a flow chart of a battery pack SOC correction control method provided by Embodiment 6 of the present invention;

[0062] Figure 8 is a schematic diagram of a battery pack SOC correction control device provided by Embodiment 7 of the present invention;

[0063] Fig. 9 It is a structural schematic diagram of an electronic device provided in Embodiment 8 of the present invention. DETAILED DESCRIPTION

[0064] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0065] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0066] Embodiment 1

[0067] Figure 1 This is a flow chart of a battery pack SOC correction control method provided in the first embodiment of the present invention. The battery pack SOC correction control method determines whether the battery pack SOC needs to be corrected by the accumulated operating throughput of the battery pack, and controls the battery pack SOC to be in a non-platform area when the battery pack SOC needs to be corrected, so as to achieve the correction of the battery pack SOC, which is conducive to eliminating the battery pack SOC estimation error and improving the estimation accuracy of the battery pack SOC. The battery pack includes multiple lithium-ion batteries. Figure 1 , the battery pack SOC correction control method includes:

[0068] S110, obtain the first capacity threshold, the second capacity threshold, the battery pack SOC (State of charge) at the time of power-off, the platform area range and the operating throughput of the battery pack; wherein the first capacity threshold and the second capacity threshold are both preset operating throughput threshold values, the first capacity threshold is less than the second capacity threshold, the operating throughput is the sum of the accumulated charging and discharging power of the battery pack when it is running in the platform area from the last time the battery pack SOC is corrected to the current power-off of the power-consuming device; the platform area range is the SOC range of the battery pack in the platform area; the battery pack SOC at the time of power-off is the battery pack SOC of the power-consuming device at the time of power-off. It should be noted that the power-off time refers to the moment when the connection between the battery pack and the power-consuming device is cut off, at which time the battery pack does not discharge to the outside, the battery management system in the battery pack is in an active state, and the battery pack is not in sleep mode.

[0069] Specifically, the operating throughput represents the sum of the accumulated charging and discharging power of the battery pack when it is running in the platform area from the last time the battery pack SOC was corrected to the time the power-consuming device was powered off. It reflects the actual use and energy flow of the battery pack during the period from the last time the battery pack SOC was corrected to the time the power-consuming device was powered off. The platform area is an area where the battery pack exhibits relatively stable performance within a specific working range. The platform area range is used to distinguish different working states of the battery pack. The battery pack SOC at the time of power-off is the battery pack SOC of the power-consuming device at the time of power-off, which reflects the remaining power state of the battery pack when the device stops running. It should be noted that the first capacity threshold and the second capacity threshold are related to the characteristics of the battery pack itself. The first capacity threshold and the second capacity threshold of the same battery pack are different. In actual application, the first capacity threshold and the second capacity threshold can be set according to actual needs. This embodiment does not limit this. For example, the first capacity threshold can be five times the nominal capacity of the battery pack, and the second capacity threshold can be ten times the nominal capacity of the battery pack.

[0070] S120, determine the relationship between the first capacity threshold, the second capacity threshold and the operating throughput; if the operating throughput is less than the first capacity threshold, execute S130; if the operating throughput is greater than or equal to the first capacity threshold and less than the second capacity threshold, execute S140; if the operating throughput is greater than or equal to the second capacity threshold, execute S150.

[0071] Specifically, when the operating throughput is greater than or equal to the first capacity threshold and less than the second capacity threshold, it is considered that the cumulative error of the battery pack SOC collection has affected the collection accuracy of the battery pack SOC. At this time, the cumulative error of the battery pack SOC needs to be eliminated, but the error between the collected battery pack SOC and the actual battery pack SOC is relatively small at this time, and the cumulative error of the battery pack SOC can be eliminated when the battery pack is fully charged or the battery pack is in a non-platform area due to daily use; when the operating throughput is less than the first capacity threshold, it is considered that the cumulative error of the battery pack SOC collection has a small impact on the collection accuracy of the battery pack SOC and can be ignored, or even no error; when the operating throughput is greater than or equal to the second capacity threshold, it is considered that the cumulative error of the battery pack SOC collection has a large impact on the collection accuracy of the battery pack SOC. At this time, the battery pack needs to be discharged to put the battery pack in a non-platform area, and then the battery pack SOC is corrected to eliminate the cumulative error of the battery pack SOC.

[0072] S130, controlling the battery pack to sleep.

[0073] S140, correcting the battery pack SOC when the battery pack is in a fully charged state.

[0074] S150, determining whether the battery pack SOC at the time of power-off is within the platform range; if not, executing S160; if yes, executing S170.

[0075] Specifically, when the battery pack SOC at the time of power-off is within the platform area, it indicates that the battery pack is in the platform area; when the battery pack SOC at the time of power-off is outside the platform area, it indicates that the battery pack is in the non-platform area. It should be noted that the platform area ranges of different types of battery packs are different. In actual applications, the platform area range of the battery pack can be determined according to the characteristics of the battery pack itself, and this embodiment does not limit this.

[0076] Figure 2 is a graph of an open circuit voltage-state of charge curve provided by an embodiment of the present invention. Figure 2It can be seen from the curve shown that there is a flat area in the SOC change of the battery pack (the area shown by point B-point C), and the flat area is the platform area of ​​the battery pack. In the platform area, the state of charge of the battery pack changes less with the open circuit voltage. At this time, the accuracy of the state of charge estimated by the battery pack based on the open circuit voltage is low. In addition, there are two steep areas in the SOC change of the battery pack, namely (the area shown by point A-point B) and (the area shown by point C-point D). The steep areas at both ends are the two non-platform areas of the battery pack. In the non-platform area, the state of charge of the battery pack changes greatly with the open circuit voltage. At this time, the accuracy of the state of charge estimated by the battery pack based on the open circuit voltage is high. Therefore, when correcting the battery pack SOC, it is necessary to ensure that the battery pack is in the non-platform area. Among them, refer to Figure 2 The platform area range is the interval between the SOC corresponding to point B and the SOC corresponding to point C.

[0077] S160, correct the battery pack SOC.

[0078] Specifically, when the battery pack SOC at the moment of power-off is outside the platform area, it indicates that the battery pack is in the non-platform area. At this time, the open circuit voltage of the battery pack changes greatly. Therefore, the battery pack SOC can be directly corrected according to the open circuit voltage of the battery pack.

[0079] S170, discharge the battery pack to a non-platform area and correct the battery pack SOC.

[0080] Specifically, when the battery pack SOC at the moment of power-off is within the platform area, it indicates that the battery pack is in the platform area at this time, and the open circuit voltage of the battery pack changes relatively stably at this time. Therefore, when correcting the battery pack SOC, the battery pack needs to be discharged to the non-platform area so that the open circuit voltage of the battery pack changes significantly, thereby correcting the battery pack SOC. Among them, the specific way to discharge the battery pack can be to discharge the battery pack at a preset time, and the preset time is a preset battery pack discharge time. In actual application, the preset time can be set according to actual needs, and this embodiment does not limit this. Exemplarily, the preset time can be 1 a.m. When discharging the battery pack, the current time and the preset time are obtained. Exemplarily, the way to obtain the current time can be obtained from the network. The timing duration is calculated according to the current time and the preset time and counted down. Among them, the time difference between the current time and the preset time is the timing duration. After the countdown of the timing duration ends, the battery pack is discharged until the battery pack SOC is less than or equal to the minimum boundary value of the platform area.

[0081] The embodiment of the present invention determines whether the battery pack SOC needs to be corrected by the operating throughput, the first capacity threshold and the second capacity threshold of the battery pack; when the operating throughput is greater than or equal to the first capacity threshold and less than the second capacity threshold, the battery pack SOC is corrected when the battery pack is in a fully charged state; when the operating throughput is greater than or equal to the second capacity threshold, whether the battery pack is in the platform area is determined according to the battery pack SOC at the time of power-off and the platform area range; when the battery pack is in the platform area, the battery pack is discharged to place the battery pack in the non-platform area, and the battery pack SOC is corrected. The embodiment of the present invention determines whether the battery pack SOC needs to be corrected by the accumulated operating throughput of the battery pack, and controls the battery pack SOC to be in the non-platform area when the battery pack SOC needs to be corrected to achieve the correction of the battery pack SOC, which is conducive to eliminating the battery pack SOC estimation error and improving the estimation accuracy of the battery pack SOC.

[0082] Embodiment 2

[0083] Figure 3 This is a flow chart of a battery pack SOC correction control method provided in the second embodiment of the present invention. The platform area range includes: an interval close to the non-platform area, an interval close to the non-platform area is an SOC interval with the minimum boundary value of the platform area range as the interval minimum value, and an interval maximum value of the interval close to the non-platform area is less than the maximum boundary value of the platform area range; before discharging the battery pack to the non-platform area and correcting the battery pack SOC, it is determined whether the battery pack SOC at the time of power-off of the electrical equipment is close to the non-platform area of ​​the battery pack according to the interval close to the non-platform area.

[0084] In this embodiment, before discharging the battery pack to the non-platform area and correcting the battery pack SOC, it is further determined whether the battery pack should be discharged and corrected based on the battery pack SOC to avoid wasting power of the battery pack. Specifically, if the battery pack SOC at the time when the power-consuming device is powered off is within a range close to the non-platform area, the battery pack is discharged to the non-platform area and the battery pack SOC is corrected; if the battery pack SOC at the time when the power-consuming device is powered off is outside the range close to the non-platform area, the battery pack is controlled to sleep. The range close to the non-platform area is a pre-set judgment range for determining whether the battery pack SOC is close to the non-platform area. The range close to the non-platform area can be set with reference to the minimum boundary value of the platform area range. The range size close to the non-platform area can be set according to the actual application situation, and this embodiment does not limit this. For example, continue to refer to Figure 2, the interval close to the non-platform area is the interval between the SOC corresponding to point B and the SOC corresponding to point E, and the minimum boundary value of the platform area is the SOC corresponding to point B. It should be noted that when the battery pack SOC is greater than the minimum value of the interval close to the non-platform area (i.e., the SOC corresponding to point B) and less than the maximum value of the interval close to the non-platform area (i.e., the SOC corresponding to point E), the battery pack is considered to be in the interval close to the non-platform area.

[0085] Based on the above embodiment, optionally, refer to Figure 3 Before discharging the battery pack to the non-platform area and correcting the battery pack SOC, it also includes: S171, determining whether the battery pack SOC at the time of power-off is in an interval close to the non-platform area; if so, executing S170; if not, executing S172.

[0086] Specifically, the SOC of the battery pack of the electric device at the time when the electric device is powered off represents the amount of electricity in the battery pack of the electric device at the time when the electric device is powered off. When the battery pack SOC at the moment the power-consuming device is powered off is within a range close to the non-platform area (the battery pack SOC at the moment the power-consuming device is powered off is greater than the SOC corresponding to point B and less than the SOC corresponding to point E), it indicates that the battery pack power is relatively low at the moment the power-consuming device is powered off. At this time, the battery pack power is close to the minimum boundary value of the platform area (the SOC corresponding to point B), that is, close to the non-platform area of ​​the battery pack; when the battery pack SOC at the moment the power-consuming device is powered off is outside the range close to the non-platform area (the battery pack SOC at the moment the power-consuming device is powered off is greater than or equal to the SOC corresponding to point E and less than or equal to the SOC corresponding to point C), it indicates that the battery pack power is high at the moment the power-consuming device is powered off, and the battery pack power is sufficient. If the battery pack is discharged to the non-platform area when the battery pack power is sufficient, a large amount of power will be consumed. Therefore, when the battery pack SOC at the moment the power-consuming device is powered off is within the platform area but not within a range close to the non-platform area, the battery pack is not discharged or corrected to avoid wasting power of the battery pack.

[0087] S170, discharge the battery pack to a non-platform area and correct the battery pack SOC.

[0088] Specifically, the battery pack is discharged at a preset time, and the battery pack SOC is corrected when the battery pack SOC is less than or equal to the minimum boundary value of the platform area (the SOC corresponding to point B). When the battery pack SOC at the time when the electric device is powered off is close to the non-platform area (between the SOC corresponding to point B and the SOC corresponding to point E), the battery pack has a low power level, and the battery pack is near the minimum boundary value of the platform area (the SOC corresponding to point B). At this time, the battery pack power can be reduced by discharging so that the battery pack is in the non-platform area. The preset time is the preset battery pack discharge time. In actual application, the preset time can be set according to actual needs, and this embodiment does not limit this. Exemplarily, the preset time can be 1 a.m. When the battery pack SOC of the electric device at the time of power off is close to the non-platform area, the current time and the preset time are obtained. Exemplarily, the way to obtain the current time can be obtained by the network. The timing duration is calculated according to the current time and the preset time and countdown is performed. Among them, the time difference between the current time and the preset time is the timing duration. After the countdown ends, the battery pack is discharged until the battery pack SOC is less than or equal to the minimum boundary value of the platform area.

[0089] The discharge of the battery pack can be achieved by heating or cooling the battery pack. When discharging the battery pack, the current temperature of the battery pack and the optimal temperature range of the battery pack can be obtained. Among them, the optimal temperature range of the battery pack represents the optimal temperature range for the operation of the battery pack. The discharge mode of the battery pack is determined according to the current temperature of the battery pack and the optimal temperature range of the battery pack. When the current temperature is less than the minimum value of the optimal temperature range of the battery pack, the battery pack is heated to increase the temperature of the battery pack to the optimal temperature range of the battery pack, thereby consuming the electric energy of the battery pack, thereby achieving the discharge of the battery pack. When the current temperature is greater than the maximum value of the optimal temperature range of the battery pack, the battery pack is cooled to reduce the temperature of the battery pack to the optimal temperature range of the battery pack, thereby consuming the electric energy of the battery pack, thereby achieving the discharge of the battery pack. Among them, when the temperature of the battery pack rises or falls to the optimal temperature range of the battery pack, and the battery pack is still in the platform area, the battery pack is heated and cooled in a cycle, so as to continue to discharge the battery pack to ensure that the battery pack can be discharged to the non-platform area.

[0090] When the current temperature is greater than or equal to the minimum value of the optimal temperature range of the battery pack and less than or equal to the maximum value of the optimal temperature range of the battery pack, the battery pack is heated and cooled in a cycle to consume the electrical energy of the battery pack. When the battery pack is heated or cooled, the temperature of the battery pack is always maintained within the optimal temperature range of the battery pack, that is, the highest temperature of the battery pack when heated is always less than or equal to the maximum value of the optimal temperature range of the battery pack, and the lowest temperature of the battery pack when cooled is always less than or equal to the minimum value of the optimal temperature range of the battery pack. Exemplarily, the discharge mode of the battery pack when the cycle starts can be determined based on the current temperature of the battery pack and the median value of the optimal temperature range of the battery pack. When the current temperature of the battery pack is less than the median value of the optimal temperature range of the battery pack, the cycle starts by heating the battery pack; when the current temperature of the battery pack is greater than or equal to the median value of the optimal temperature range of the battery pack, the cycle starts by cooling the battery pack.

[0091] S172, control the battery pack to sleep.

[0092] For example, in actual application, the battery pack can be put into a dormant state by disconnecting the connection between the battery pack and the electrical device.

[0093] Embodiment 3

[0094] Figure 4 This is a flow chart of a battery pack SOC correction control method provided by Embodiment 3 of the present invention. The platform area range includes: a normal platform area interval, a normal platform area interval is an SOC interval with a maximum boundary value of the platform area range as the interval maximum value, and a normal platform area interval has a minimum interval value greater than the minimum boundary value of the platform area range.

[0095] In this embodiment, before determining whether the battery pack SOC at the time of power-off is within the platform area, it is also determined whether the battery pack is within the ordinary platform area based on the battery pack SOC at the time when the power-consuming device is powered off. Specifically, if the battery pack SOC at the time when the power-consuming device is powered off is within the ordinary platform area, the battery pack is controlled to sleep; if the battery pack SOC at the time when the power-consuming device is powered off is outside the ordinary platform area, it is determined whether the battery pack SOC at the time of power-off is within the platform area. It should be noted that the ordinary platform area can be set with reference to the maximum boundary value of the platform area range, and the size of the ordinary platform area can be set according to the actual application situation, and this embodiment does not limit this. For example, continue to refer to Figure 2, the normal platform area is the interval between the SOC corresponding to point E and the SOC corresponding to point C, and the maximum boundary value of the platform area is the SOC corresponding to point C. It should be noted that when the battery pack SOC is greater than the minimum value of the normal platform area (i.e., the SOC corresponding to point E) and less than the maximum value of the normal platform area (i.e., the SOC corresponding to point C), the battery pack is considered to be in the normal platform area.

[0096] Based on the above embodiments, optionally, refer to Figure 4 Before determining whether the battery pack SOC at the time of power-off is within the platform range, it also includes:

[0097] S151. Determine whether the battery pack SOC at the time of power-off is within the normal platform range; if so, execute S152; if not, execute S150.

[0098] Specifically, the battery pack SOC at the time when the power-consuming device is powered off characterizes the power of the battery pack of the power-consuming device at the time of power off. When the battery pack SOC at the time when the power-consuming device is powered off is greater than the SOC corresponding to point E and less than the SOC corresponding to point C, it indicates that the battery pack SOC at the time when the power-consuming device is powered off is within the normal platform area, the power of the battery pack is high at the time when the power-consuming device is powered off, and the battery pack has sufficient power. If the battery pack is discharged to the non-platform area when the battery pack has sufficient power, a large amount of power will be consumed. Therefore, when the battery pack SOC at the time when the power-consuming device is powered off is within the normal platform area, the battery pack is not discharged and corrected to avoid wasting power in the battery pack.

[0099] S151, control the battery pack to sleep.

[0100] S150: Determine whether the battery pack SOC at the time of power-off is within the platform range.

[0101] Specifically, since the normal platform range is an SOC range with the maximum boundary value of the platform range as the maximum value of the range, when the battery pack SOC at the time of power-off is outside the normal platform range, the battery pack SOC at this time may be within the platform range or outside the platform range. Figure 2When the battery pack SOC at this time is less than the SOC corresponding to point B or the battery pack SOC at this time is greater than the SOC corresponding to point C, it indicates that the battery pack is outside the platform area and is in the non-platform area. The open circuit voltage of the battery pack changes significantly, and the battery pack SOC can be directly corrected. When the battery pack SOC at this time is greater than the SOC corresponding to point B and the battery pack SOC at this time is less than the SOC corresponding to point E, it indicates that the battery pack is within the platform area and is in the platform area. The open circuit voltage of the battery pack changes relatively insignificantly, and the battery pack needs to be discharged to make the battery pack in the non-platform area, so as to correct the battery pack SOC.

[0102] It should be noted that, in combination with Example 2, in actual application, the platform area range can be composed of an interval close to the non-platform area and an ordinary platform area interval. The interval close to the non-platform area is an SOC interval with the minimum boundary value of the platform area range as the interval minimum value, and the ordinary platform area interval is an SOC interval in the platform area range except the interval close to the non-platform area. The maximum value of the interval close to the non-platform area is the minimum value of the interval in the ordinary platform area, and the maximum boundary value of the platform area is the maximum value of the interval in the ordinary platform area. Before discharging the battery pack to the non-platform area and correcting the battery pack SOC, determine whether the battery pack SOC at the time of power-off of the electrical equipment is close to the non-platform area of ​​the battery pack based on the interval close to the non-platform area.

[0103] Embodiment 4

[0104] Figure 5 This is a flow chart of a battery pack SOC correction control method provided by the fourth embodiment of the present invention. In this embodiment, the steps of correcting the battery pack SOC are further specified as follows: obtaining the open circuit voltage of the battery pack and the OCV-SOC curve (open circuit voltage-state of charge curve) of the battery pack; determining the actual SOC of the battery pack at the current moment according to the open circuit voltage of the battery pack and the OCV-SOC curve of the battery pack; and using the actual SOC of the battery pack at the current moment as the battery pack SOC of the battery pack at the current moment.

[0105] Based on the above embodiments, optionally, refer to Figure 5 , the specific methods for correcting the battery pack SOC include:

[0106] S161. Obtain the open circuit voltage of the battery pack and the OCV-SOC curve of the battery pack.

[0107] Specifically, the open circuit voltage of a battery pack refers to the potential difference between the positive and negative electrodes when the battery pack is in an open circuit state. The open circuit voltage of a battery pack can intuitively reflect the current state of the battery pack. The OCV-SOC curve of a battery pack characterizes the change in the state of charge of the battery pack at different open circuit voltages. Different open circuit voltages of a battery pack correspond to different states of charge.

[0108] S162. Determine the actual SOC of the battery pack at the current moment according to the open circuit voltage of the battery pack and the OCV-SOC curve of the battery pack.

[0109] Specifically, the open circuit voltage of the battery pack in the OCV-SOC curve corresponds to the state of charge one by one. Therefore, when determining the open circuit voltage of the battery pack, the point corresponding to the open circuit voltage is determined in the OCV-SOC curve to obtain the SOC of the battery pack. According to the open circuit voltage of the battery pack, the SOC corresponding to the open circuit voltage of the battery pack is determined in the OCV-SOC curve of the battery pack. The SOC corresponding to the open circuit voltage of the battery pack is the actual SOC of the battery pack at the current moment.

[0110] S163. Use the actual SOC of the battery pack at the current moment as the battery pack SOC of the battery pack at the current moment.

[0111] Specifically, since the battery pack is in the non-platform area at this time, the OCV-SOC curve of the battery pack changes significantly in the non-platform area, and the SOC corresponding to the open circuit voltage of the battery pack in the non-platform area is more accurate. Therefore, the actual SOC of the battery pack determined according to the open circuit voltage is also more accurate. The actual SOC of the battery pack at the current moment is used as the battery pack SOC of the battery pack at the current moment to realize the correction of the battery pack SOC.

[0112] It should be noted that the correction of the battery pack SOC after the battery pack is discharged to the non-platform area can also be achieved in the above manner. In the process of correcting the battery pack SOC, the battery pack is discharged to the non-platform area, which is essentially no different from the battery pack being in the non-platform area at the moment of power-off. As long as the SCO of the battery pack is in the non-platform area when the correction is performed, the correction can be achieved in the above manner.

[0113] Embodiment 5

[0114] Figure 6 : is a flow chart of a battery pack SOC correction control method provided in Embodiment 5 of the present invention. In this embodiment, the correction of the battery pack SOC when the battery pack is in a fully charged state is further specified as: prompting the user to fully charge the battery pack; if the user fully charges the battery pack, assigning the SOC of the battery pack in a fully charged state to 100% to correct the battery pack SOC when the battery pack is in a fully charged state; if the user does not fully charge the battery pack, continuing to prompt the user to fully charge the battery pack.

[0115] Based on the above embodiments, optionally, refer to Figure 6 , the specific method of correcting the battery pack SOC when the battery pack is in a fully charged state includes:

[0116] S141. Prompt the user to fully charge the battery pack.

[0117] Exemplarily, when prompting the user, the prompt may be made through an electric device, or through a terminal, wherein the terminal may be a mobile phone.

[0118] S142, determine whether the user has fully charged the battery pack; if so, execute S143; if not, execute S141.

[0119] Specifically, the full charge state of the battery pack is detected. When the battery pack is in a fully charged state, it indicates that the user has fully charged the battery pack, and the battery pack SOC is corrected at this time; when the battery pack is not in a fully charged state, it indicates that the user has not fully charged the battery pack, and the user is continued to be prompted to fully charge the battery pack. It should be noted that in actual applications, different strategies can be set for the situation where the battery pack is not in a fully charged state according to the needs of the application, for example, controlling the battery pack to sleep, and this embodiment does not limit this.

[0120] S143, assigning the SOC of the battery pack when it is in a fully charged state to 100% to correct the SOC of the battery pack when it is in a fully charged state.

[0121] Specifically, the state of charge is the ratio of the remaining capacity of the battery to its capacity in a fully charged state. When the battery pack is fully charged, the ratio of the remaining capacity of the battery pack to its capacity in a fully charged state is 1, that is, the battery pack SOC is 100%.

[0122] Embodiment 6

[0123] Figure 7 is a flow chart of a battery pack SOC correction control method provided in Embodiment 6 of the present invention. In this embodiment, after the battery pack SOC is corrected, the operation throughput is also cleared. Based on the above embodiments, optionally, refer to Figure 7 , after the battery pack SOC is corrected, it also includes:

[0124] S180. Clear the running throughput to zero.

[0125] Specifically, after the battery pack SOC correction is completed, the accumulated operating throughput of the battery pack is cleared, and the operating throughput of the battery pack is accumulated again to improve the judgment accuracy of the accumulated error of the battery pack SOC collection, thereby avoiding the deterioration of the battery pack SOC collection accuracy.

[0126] Embodiment 7

[0127] Figure 8 Schematic diagram of a battery pack SOC correction control device provided by Embodiment 7 of the present invention. This embodiment provides a battery pack SOC correction control device. Figure 8 The battery pack SOC correction control device 100 includes: an acquisition module 110, a full-charge correction module 120, a correction judgment module 130, a first correction module 140 and a second correction module 150.

[0128] The acquisition module 110 is used to obtain the first capacity threshold, the second capacity threshold, the battery pack SOC at the time of power-off, the platform area range and the operating throughput of the battery pack; wherein the first capacity threshold and the second capacity threshold are both preset operating throughput threshold values, the first capacity threshold is less than the second capacity threshold, the operating throughput is the sum of the accumulated charging and discharging power of the battery pack when the battery pack is operating in the platform area from the last time the battery pack SOC is corrected to the current power-off of the power-consuming device; the platform area range is the SOC range of the battery pack in the platform area; the battery pack SOC at the time of power-off is the battery pack SOC of the power-consuming device at the time of power-off. The full-charge correction module 120 is used to correct the battery pack SOC when the battery pack is in a fully charged state if the operating throughput is greater than or equal to the first capacity threshold and less than the second capacity threshold. The correction judgment module 130 is used to determine whether the battery pack SOC at the time of power-off is within the platform area if the operating throughput is greater than or equal to the second capacity threshold. The first correction module 140 is used to discharge the battery pack to the non-platform area and correct the battery pack SOC if the battery pack SOC at the time of power-off is within the platform area. The second correction module 150 is used to correct the battery pack SOC if the battery pack SOC at the power-off time is outside the platform area.

[0129] It should be noted that the battery pack SOC correction control device 100 provided in this embodiment has the beneficial effects of the battery pack SOC correction control method provided in any of the above embodiments, which will not be described in detail here.

[0130] Embodiment 8

[0131] Fig. 9: is a structural schematic diagram of an electronic device provided by Embodiment 8 of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0132] like Fig. 9 As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0133] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0134] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the battery pack SOC correction control method.

[0135] In some embodiments, the battery pack SOC correction control method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the battery pack SOC correction control method described above may be performed. Alternatively, in other embodiments, the processor 11 may be configured to execute the battery pack SOC correction control method in any other appropriate manner (e.g., by means of firmware).

[0136] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0137] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0138] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0139] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0140] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0141] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0142] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0143] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery pack SOC correction control method, characterized in that: The battery pack includes a plurality of lithium-ion batteries; The battery pack SOC correction control method includes: Obtain a first capacity threshold, a second capacity threshold, the battery pack SOC at the time of power-off, a platform area range, and an operating throughput of the battery pack; wherein the first capacity threshold and the second capacity threshold are both preset operating throughput threshold values, the first capacity threshold is less than the second capacity threshold, and the operating throughput is the sum of the accumulated charging and discharging power of the battery pack when it is operating in the platform area from the last time the battery pack SOC is corrected to the current power-off of the power-consuming device; the platform area range is the SOC range of the battery pack in the platform area; the battery pack SOC at the time of power-off is the battery pack SOC of the power-consuming device when it is powered off this time; If the operation throughput is greater than or equal to the first capacity threshold and less than the second capacity threshold, correcting the battery pack SOC when the battery pack is in a fully charged state; If the operation throughput is greater than or equal to the second capacity threshold, determining whether the battery pack SOC at the power-off time is within the platform area; If the battery pack SOC at the power-off time is within the platform area, discharging the battery pack to the non-platform area and correcting the battery pack SOC; If the battery pack SOC at the power-off moment is outside the platform area, the battery pack SOC is corrected.

2. The battery pack SOC correction control method according to claim 1, characterized in that: The platform area range includes: an interval close to a non-platform area, the interval close to the non-platform area is an SOC interval with a minimum boundary value of the platform area range as an interval minimum value, and the interval maximum value of the interval close to the non-platform area is less than the maximum boundary value of the platform area range; before discharging the battery pack to the non-platform area and correcting the SOC of the battery pack, it also includes: Determining whether the battery pack SOC at the power-off time is within the close-to-non-platform region; If the battery pack SOC at the power-off time is within the range close to the non-platform region, the battery pack is discharged to the non-platform region and the battery pack SOC is corrected; If the SOC of the battery pack at the power-off time is outside the near-non-platform range, the battery pack is controlled to hibernate.

3. The battery pack SOC correction control method according to claim 1, characterized in that: The platform area range includes: a common platform area interval, the common platform area interval is an SOC interval with a maximum boundary value of the platform area range as an interval maximum value, and a minimum interval value of the common platform area interval is greater than a minimum boundary value of the platform area range; before determining whether the battery pack SOC at the power-off time is within the platform area range, it also includes: Determining whether the battery pack SOC at the power-off moment is within the normal platform range; If the SOC of the battery pack at the power-off time is within the normal platform range, controlling the battery pack to hibernate; If the battery pack SOC at the power-off time is outside the normal platform range, it is determined whether the battery pack SOC at the power-off time is within the platform range.

4. The battery pack SOC correction control method according to claim 1, characterized in that: The specific method of discharging the battery pack includes: Obtaining the current temperature of the battery pack and the optimal temperature range of the battery pack; If the current temperature is less than a minimum value of the optimal temperature range of the battery pack, heating the battery pack to consume the electric energy of the battery pack; If the current temperature is greater than the maximum value of the optimal temperature range of the battery pack, cooling the battery pack to consume the electric energy of the battery pack; If the current temperature is greater than or equal to a minimum value of the optimal temperature range of the battery pack and less than or equal to a maximum value of the optimal temperature range of the battery pack, a heating and cooling cycle is performed on the battery pack to consume electrical energy of the battery pack.

5. The battery pack SOC correction control method according to claim 1, characterized in that: The specific method for correcting the battery pack SOC includes: Obtaining an open circuit voltage of the battery pack and an OCV-SOC curve of the battery pack; Determining the actual SOC of the battery pack at a current moment according to the open circuit voltage of the battery pack and the OCV-SOC curve of the battery pack; The actual SOC of the battery pack at the current moment is used as the battery pack SOC of the battery pack at the current moment.

6. The battery pack SOC correction control method according to claim 1, characterized in that: The specific method for correcting the SOC of the battery pack when the battery pack is in a fully charged state includes: Prompting the user to fully charge the battery pack; If the user fully charges the battery pack, the SOC of the battery pack when it is in a fully charged state is assigned to 100% to correct the SOC of the battery pack when it is in a fully charged state; If the user has not fully charged the battery pack, continue to prompt the user to fully charge the battery pack.

7. The battery pack SOC correction control method according to any one of claims 1 to 6, characterized in that: The specific method of discharging the battery pack to the non-platform area and correcting the SOC of the battery pack includes: The battery pack is discharged within a preset time, and the SOC of the battery pack is corrected when the SOC of the battery pack is less than or equal to a minimum boundary value of the platform area.

8. The battery pack SOC correction control method according to claim 7, characterized in that: The specific method of discharging the battery pack at a preset time includes: Get the current time and the preset time; Calculate the timing duration according to the current time and the preset time and perform a countdown; After the countdown of the timing duration ends, the battery pack is discharged.

9. The battery pack SOC correction control method according to claim 1, characterized in that: After the battery pack SOC is corrected, the method further includes: Clears the running throughput to zero.

10. A battery pack SOC correction control device, characterized in that: include: An acquisition module is used to acquire a first capacity threshold, a second capacity threshold, a battery pack SOC at the time of power-off, a platform area range, and an operating throughput of the battery pack; wherein the first capacity threshold and the second capacity threshold are both preset operating throughput threshold values, the first capacity threshold is less than the second capacity threshold, and the operating throughput is the sum of the accumulated charging and discharging power of the battery pack when it is operating in the platform area from the last time the battery pack SOC is corrected to the current power-off of the power-consuming device; the platform area range is the SOC range of the battery pack in the platform area; the battery pack SOC at the time of power-off is the battery pack SOC of the power-consuming device when it is powered off this time; a full-charge correction module, configured to correct the SOC of the battery pack when the battery pack is in a fully-charged state if the operating throughput is greater than or equal to the first capacity threshold and less than the second capacity threshold; A correction judgment module is used to judge whether the battery pack SOC at the power-off moment is within the platform area if the operation throughput is greater than or equal to the second capacity threshold; A first correction module, configured to discharge the battery pack to a non-platform area and correct the battery pack SOC if the battery pack SOC at the power-off moment is within the platform area; The second correction module is used to correct the battery pack SOC if the battery pack SOC at the power-off moment is outside the platform area.

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