Control method, control device, energy storage power supply, and storage medium

Abstract

A control method, a control device (2), an energy storage power supply (1), and a storage medium. The control method comprises: when an energy storage power supply (1) is disconnected from a charger and under load, acquiring a load current and a load time of the energy storage power supply (1); acquiring a correction time of the energy storage power supply (1); acquiring a state of charge (SOC) deviation of the energy storage power supply (1); determining a speed factor on the basis of the ratio of the SOC deviation to the correction time; and acquiring a first SOC of the energy storage power supply (1) on the basis of the load current, the speed factor, and the load time until the load time reaches the correction time.

Description

Control methods, control devices, energy storage power sources, and storage media

[0001] Priority information

[0002] This application claims priority and benefits to patent application No. 202411218498.9, filed with the China National Intellectual Property Administration on August 29, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of energy storage power technology, and in particular to a control method, control device, energy storage power supply and storage medium. Background Technology

[0004] In related technologies, when a fully charged energy storage power supply is connected to the charging gun, it enters a sleep (standby) state. Due to limited data acquisition accuracy, the BMS (Battery Management System) of the energy storage power supply does not collect data on the power supply's losses, leading to deviations in the accuracy of the monitored SOC (State of Charge). The inventors realized that when the energy storage power supply is fully charged for a period of time and then unplugged from the charging gun and used under load, the displayed SOC of the energy storage power supply will not match the actual SOC, resulting in fluctuations in the displayed SOC during the use of the energy storage power supply. Summary of the Invention

[0005] This application provides a control method, control device, energy storage power supply, and storage medium to solve at least one of the aforementioned technical problems.

[0006] One embodiment of this application provides a control method for an energy storage power source, the energy storage power source displaying a first state of charge, the control method comprising:

[0007] When the energy storage power supply is disconnected from the charger and under load, the load current and load time of the energy storage power supply are obtained.

[0008] Obtain the correction time of the energy storage power source;

[0009] Obtain the deviation state of charge of the energy storage power source;

[0010] The speed factor is determined based on the ratio of the deviation state of charge to the correction time;

[0011] The first state of charge of the energy storage power source is obtained based on the load current, the speed factor, and the load time until the load time reaches the correction time.

[0012] In the above control method, the first state of charge of the energy storage power supply can be obtained based on the load current, speed factor and load time, thereby improving the accuracy of the first state of charge and avoiding the occurrence of first state of charge jump during the use of the energy storage power supply to a certain extent.

[0013] One control device according to an embodiment of this application includes:

[0014] Processor, and;

[0015] The memory stores a computer program, which, when executed by the processor, implements the steps of the control method described above.

[0016] An energy storage power supply according to an embodiment of this application includes the above-described control device.

[0017] This application provides a computer-readable storage medium storing a computer program thereon, which, when executed by the processor, implements the steps of the control method described above.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0020] Figures 1 to 9 are schematic flowcharts of the control method according to the embodiments of this application;

[0021] Figure 10 is a schematic diagram of the energy storage power supply module according to an embodiment of this application.

[0022] Explanation of key component symbols:

[0023] Energy storage power supply 1, control device 2, memory 21, processor 22, battery module 3. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of this application, and should not be construed as limiting the embodiments of this application.

[0025] Please refer to Figure 1. An embodiment of this application illustrates a control method for an energy storage power supply 1, which displays a first State of Charge (SOC). The control method includes:

[0026] Step S1: When the energy storage power supply 1 is disconnected from the charger and under load, obtain the load current and load time of the energy storage power supply 1.

[0027] Step S3: Obtain the correction time of energy storage power supply 1;

[0028] Step S5: Obtain the deviation state of charge of energy storage power supply 1;

[0029] Step S7: Determine the speed factor based on the ratio of the deviation state of charge to the correction time;

[0030] Step S9: Obtain the first state of charge of energy storage power supply 1 based on the load current, speed factor and load time until the load time reaches the correction time.

[0031] Specifically, the load current refers to the magnitude of the current transferred when the energy storage power supply 1 supplies power to an external load; that is, the actual current value when the energy storage power supply 1 provides electrical energy to the load. The load current can be monitored in real time by the battery management system (BMS) of the energy storage power supply 1, and the load current will change with the load. For example, the load can include, but is not limited to, household appliances (such as ovens, induction cookers, baking trays, televisions, refrigerators, etc.) and mobile devices (such as smartphones, tablets, laptops, cameras, or camcorders, etc.).

[0032] Load carrying time refers to the time that the energy storage power source 1 operates under the specified load current.

[0033] The correction time refers to the amount of time determined based on the load current and used to correct the first SOC (State of Charge). Optionally, the correction time can be greater than or equal to 2 minutes and less than or equal to 8 minutes.

[0034] The first SOC can be the SOC displayed on the user interface of the energy storage power source 1, which is used to influence the user's expectations of the remaining power of the energy storage power source 1 and their usage decisions.

[0035] Specifically, the energy storage power supply 1 includes a battery module 3 and several electronic components (e.g., a battery management system (BMS) and an inverter). When the energy storage power supply 1 is fully charged and still connected to the charger, it enters a dormant state. In this state, the electronic components inside the energy storage power supply 1 will dissipate battery power at a certain static self-dissipation power. However, due to the limited accuracy of the BMS, it cannot monitor minute self-dissipation currents (such as milliamps or microamps) in real time. When the energy storage power supply 1 suddenly enters the load-bearing stage from the dormant stage, the BMS cannot accurately reflect the actual SOC, which may lead to inaccurate accuracy of the first SOC, thus causing a jump in the first SOC. This phenomenon is particularly prominent in low-temperature environments. In low-temperature environments, the voltage of the battery module 3 drops rapidly, causing the SOC change to accelerate, thereby increasing the probability of a jump in the first SOC. Furthermore, when the battery module 3's charge is close to its lowest point, the voltage drop of the battery module 3 often becomes steeper, further increasing the probability of a jump in the first SOC. When the first SOC is the SOC displayed on the user interface, the change in the first SOC will affect the user's judgment of the battery life of the energy storage power supply 1, thus reducing the user experience.

[0036] Therefore, when energy storage power supply 1 is in a fully charged sleep state, the charger is suddenly unplugged and a load is applied. During the load application process, the first SOC of energy storage power supply 1 is obtained based on the load current, speed factor, and load time. This corrects the SOC deviation caused by capacity loss due to sleep self-discharge within the correction time. This can, to some extent, avoid the high cost and low integration problems brought about by high acquisition accuracy requirements, and improve the accuracy of the first SOC. This, in turn, avoids the risk of first SOC jumps to some extent, thus ensuring the effective display of the real-time usage status of energy storage power supply 1 and ensuring a better user experience.

[0037] In summary, the above control method can obtain the first SOC of the energy storage power supply 1 based on the load current, speed factor and load time, thereby improving the accuracy of the first SOC and avoiding the occurrence of first SOC jumps in the energy storage power supply 1 during use to a certain extent.

[0038] Furthermore, referring to Figure 2, in some embodiments, step S3 includes:

[0039] Step S31: Obtain the correction time of energy storage power supply 1 based on the load current. The correction time is negatively correlated with the load current.

[0040] Specifically, the mapping relationship between time and current reflects the relationship between load current and correction time. Load current and correction time are negatively correlated. The larger the load current, the shorter the correction time; conversely, the smaller the load current, the longer the correction time.

[0041] In the above embodiments, the correction time can be determined based on the mapping relationship between time and current and the load current, thereby ensuring that the first SOC change of the energy storage power supply 1 remains stable and timely under different load current conditions. Specifically, under small load current, the energy storage power supply 1 discharges slowly, and the SOC change is also small. A longer correction time can ensure a smooth change in the first SOC when correcting it, improving the user experience. Under large load current, the energy storage power supply 1 discharges quickly, and the SOC change is also large. A shorter correction time can quickly correct the first SOC, thereby reflecting the true SOC in a timely and accurate manner.

[0042] For example, there is a preset mapping relationship between the correction time and the load current, thereby the correction time can be quickly determined based on the load current and the preset mapping relationship. The mapping relationship can be pre-calibrated and stored in the BMS, or stored in other components of the energy storage power supply 1, or stored in a terminal device that is communicatively connected to the energy storage power supply 1. The terminal device includes, but is not limited to, mobile phones, tablets, wearable smart devices (smart helmets, smart glasses, smartwatches, smart bracelets, etc.), personal computers, servers, etc.

[0043] Furthermore, in some embodiments, the battery module 3 of the energy storage power supply 1 includes multiple battery cells, and the mapping relationship is related to the rated capacity of the energy storage power supply 1.

[0044] Specifically, the rated capacity (C0) of energy storage power supply 1 is the total capacity measured under specified conditions by all battery cells at the time of manufacture or after standardized testing. It is the maximum amount of electricity that all battery cells can store when fully charged. The unit of rated capacity can be ampere-hours (A·h).

[0045] The discharge rate C is the ratio between the load current and the rated capacity C0. It indicates how many times C0 is discharged per hour, which is the discharge rate. For example, if the rated capacity C0 = 10 A·h and the load current is 2 Amps, then the discharge rate is 0.2C, which means that all cells can discharge at 0.2 times C0 per hour for 5 hours.

[0046] In some examples, the mapping is configured as follows: when the discharge rate is less than 0.5C, i.e., when the load current is less than 0.5 times C0, the correction time is 8 minutes; when the discharge rate is greater than or equal to 0.5C and less than or equal to 1C, i.e., when the load current is greater than or equal to 0.5 times C0 and less than or equal to 1 times C0, the correction time is 4 minutes; when the discharge rate is greater than 1C, i.e., when the load current is greater than 1 times C0, the correction time is 2 minutes. See Table 1 for details.

[0047] Table 1

[0048] In one example, the rated capacity C0 of energy storage power supply 1 is 20A·h. When the load current is less than 0.5 times C0, that is, when the load current is less than 10A (amperes), the correction time is 8 minutes; when the load current is greater than or equal to 0.5 times C0 and less than or equal to 1 times C0, that is, when the load current is greater than or equal to 10A and less than or equal to 20A, the correction time is 4 minutes; when the load current is greater than 1 times C0, that is, when the load current is greater than 20A, the correction time is 2 minutes.

[0049] In the above embodiments, the mapping relationship can be determined by C0 based on the calibrated capacity, thereby enabling adaptive energy storage power supply 1 of different specifications, and thus reasonably configuring the correction time to improve the accuracy of the first SOC.

[0050] Furthermore, referring to Figure 3, in some embodiments, step S9 includes:

[0051] Step S91: Obtain the second SOC based on the speed factor and load time;

[0052] Step S93: Obtain the third SOC based on the load current and load time;

[0053] Step S95: Obtain the first SOC based on the second SOC and the third SOC.

[0054] Specifically, the rate factor is the ratio between the deviation SOC and the correction time, representing the correction rate per unit time during the correction of the first SOC. For example, the rate factor β can be obtained by the following formula: β = SOC(x%) / t

[0055] Where SOC(x%) represents the deviation SOC, and t represents the correction time.

[0056] The second SOC is the product of the load-bearing time and the speed factor, representing the corrected SOC that changes with the load-bearing time. When the load-bearing time equals the correction time, the corrected SOC equals the deviation SOC, at which point the first SOC correction is complete. For example, if the deviation SOC is 10% and the correction time is 8 minutes, after energy storage power source 1 is loaded for 2 minutes, the second SOC is 2.5%; after energy storage power source 1 is loaded for 4 minutes, the second SOC is 5%; and after energy storage power source 1 is loaded for 8 minutes, the second SOC is 10%.

[0057] Understandably, after the first SOC correction is completed, the energy storage power source 1 will perform normal SOC calculation and management based on the corrected first SOC.

[0058] The third SOC is the ratio between the product of the load time and the load current and the rated capacity C0 of the energy storage power supply 1. It represents the SOC corresponding to the power consumed by the load current when the energy storage power supply 1 is used under load after the charger is unplugged.

[0059] The first SOC equals 100% minus the second and third SOCs. For example, the first SOC can be determined by the following formula...

[0060] The formula yields: First SOC = 100% - I*t n / C0-β*t n

[0061] Where I represents the load current, t n C0 represents the rated capacity of energy storage power source 1, and β represents the speed factor.

[0062] In one example, the rated capacity C0 of energy storage power source 1 is 10 A·h, the deviation SOC is 5%, and the load current is 10 A, so the correction time is 4 min. After energy storage power source 1 is under load for 1 min, the second SOC is 1.25%, the third SOC is 1%, and the first SOC is 97.75%; after energy storage power source 1 is under load for 2 min, the second SOC is 2.5%, the third SOC is 2%, and the first SOC is 95.5%; after energy storage power source 1 is under load for 3 min, the second SOC is 3.75%, the third SOC is 3%, and the first SOC is 93.25%; after energy storage power source 1 is under load for 4 min, the second SOC is 5%, the third SOC is 4%, and the first SOC is 91%, at which point the first SOC correction is complete.

[0063] In the above embodiments, the speed factor can ensure that the correction of the first SOC is completed within the correction time, and at the same time ensure that the first SOC changes smoothly during the correction process, thereby improving the user experience.

[0064] Furthermore, referring to Figure 4, in some embodiments, the control method includes:

[0065] Step S01: With the energy storage power supply 1 connected to the charger, obtain the fourth SOC of the energy storage power supply 1;

[0066] Step S01a: When the fourth SOC meets the float charging condition, control the charger to charge the energy storage power supply 1.

[0067] In step S01b, if the fourth SOC does not meet the float charging condition, the charger is controlled to stop charging the energy storage power supply 1.

[0068] Specifically, the fourth SOC is the SOC of the remaining power after the energy storage power supply 1 is fully charged (SOC = 100%) and the battery power is lost due to its internal static self-dissipation power.

[0069] Float charging is a charging method typically used after the battery module 3 of the energy storage power source 1 is fully charged, to maintain the battery module 3 in a fully charged state. Float charging uses a lower voltage and current to compensate for the self-discharge of the energy storage power source 1 and maintain the battery's state of charge (SOC). However, long-term float charging not only accelerates battery life degradation and affects battery cycle performance, but also leads to phenomena such as gas generation in the battery, which can cause safety accidents in severe cases, greatly increasing the safety risks of battery use. Therefore, by triggering the charger to charge the energy storage power source 1 when the fourth SOC condition is met, that is, when the energy storage power source 1's charge has decreased to a certain level, and not charging the energy storage power source 1 when the fourth SOC condition is not met, that is, when the energy storage power source 1's charge has not decreased to a certain level, the number of float charging cycles can be effectively reduced, and the effects of long-term float charging can be avoided to some extent.

[0070] Furthermore, since the fourth SOC does not meet the float charging condition, meaning the energy storage power source 1 has not lost enough power, there is a power loss due to self-consumption that does not meet the float charging condition. The SOC value corresponding to this power loss is the deviation SOC, leading to inaccurate accuracy of the first SOC and potentially causing a jump in the first SOC. Therefore, when the energy storage power source 1 fails to meet the float charging condition to trigger charging and a deviation SOC exists, the first SOC can be corrected. This involves obtaining the first SOC of the energy storage power source 1 based on the load current, speed factor, and load time during the load-carrying process. This effectively reduces the number of float charging cycles while improving the accuracy of the first SOC, thus mitigating the risk of first SOC jumps to some extent.

[0071] The above embodiments can effectively reduce the number of float charging cycles, reduce the occurrence of negative reactions in the battery under high voltage, improve the consistency, safety, reliability and lifespan of the energy storage power supply 1, and at the same time improve the accuracy of the first SOC, thereby avoiding the risk of first SOC jump to a certain extent, thus ensuring the effective display of the real-time usage status of the energy storage power supply 1 and ensuring user experience.

[0072] Furthermore, in some embodiments, the float charge condition includes a fourth SOC being less than or equal to a set value.

[0073] Specifically, when the fourth SOC drops to or below the set value, the BMS determines that the energy storage power supply 1 needs to be float charged to compensate for the self-discharge of the internal components of the energy storage power supply 1, thereby triggering the charger to charge the energy storage power supply 1.

[0074] In the above embodiments, the charger can be triggered to charge the energy storage power supply 1 when the fourth SOC is less than or equal to the set value, and the charger will not charge the energy storage power supply 1 when the fourth SOC is greater than the set value, thereby effectively reducing the frequency of the energy storage power supply 1 triggering float charging.

[0075] In one implementation, when the fourth SOC drops to 95%, the BMS sends a charging command to the energy storage power supply 1 to enable the energy storage power supply 1 to turn on the charging switch, so that the charger can charge the energy storage power supply 1. At the same time, a display command is sent to the energy storage power supply 1 so that the SOC displayed on the user interface is 99%, which can improve the user's intuitive experience and increase the reliability of the energy storage power supply 1.

[0076] Furthermore, in some implementations, the set value is greater than or equal to 90% and less than or equal to 95%.

[0077] Specifically, since different energy storage power sources 1 have different specifications, their rated capacities also differ. Setting the set value according to the different specifications and capacities of the energy storage power source 1 can ensure that the power demand is met, while avoiding overcharging to a certain extent, thereby improving the user experience and effectively extending the service life of the energy storage power source 1. Optionally, when the rated capacity of the energy storage power source 1 is small, the set value is small, and when the rated capacity of the energy storage power source 1 is large, the set value is large.

[0078] In some examples, the set value is equal to 90%, 91%, 92%, 93%, 94%, 95%, or other values ​​greater than or equal to 90% and less than or equal to 95%.

[0079] Furthermore, when the fourth SOC does not meet the float charge condition and there is a deviation SOC, setting a value greater than or equal to 90% can ensure that the deviation SOC remains within a small range, thereby reducing the difficulty of correcting the first SOC and improving the accuracy and effectiveness of the correction.

[0080] In the above embodiments, limiting the set value to be greater than or equal to 90% and less than or equal to 95% can, to a certain extent, avoid over-floating charging and ensure that the power demand is met, while reducing the difficulty of correcting the first SOC and improving the accuracy and effectiveness of the correction.

[0081] In one implementation, the setpoint is 95%, and the rated capacity C0 of energy storage power supply 1 is 10 A·h. When the fourth SOC drops to 97%, the BMS determines that energy storage power supply 1 does not need to be float charged, and there is a deviation SOC due to self-discharge loss, with a deviation SOC of 3%. At this time, the charger is unplugged and a load is applied with a load current of 10 A, and the correction time is 4 minutes. After 1 minute of load application, the second SOC is 0.75%, the third SOC is 1%, and the first SOC is 98.25%; after 2 minutes of load application, the second SOC is 1.5%, the third SOC is 2%, and the first SOC is 97.5%; after 3 minutes of load application, the second SOC is 2.25%, the third SOC is 3%, and the first SOC is 94.75%; after 4 minutes of load application, the second SOC is 3%, the third SOC is 4%, and the first SOC is 93%, at which point the first SOC correction is complete.

[0082] Furthermore, referring to Figure 5, in some embodiments, step S01 includes:

[0083] Step S5: Obtain the deviation SOC of energy storage power supply 1;

[0084] Step S013: Obtain the fourth SOC based on the deviation SOC.

[0085] Specifically, when the energy storage power supply 1 remains connected to the charging connection after being fully charged, it enters a sleep state. In this sleep state, the electronic components inside the energy storage power supply 1 dissipate battery power at a certain static self-dissipation power until the fourth SOC meets the float charging conditions, at which point it enters a charging state. After being fully charged, it remains connected to the charging connection again, and the energy storage power supply 1 enters a sleep state again. This cycle repeats until the charger is disconnected and the system enters the load-bearing phase. If the charger is disconnected during the final sleep phase and the system enters the load-bearing phase, there may be a deviation in SOC, requiring correction of the accuracy issue in the first SOC caused by the deviation in SOC during the final sleep phase.

[0086] The deviation SOC is the ratio between the product of the last sleep phase's sleep time and the rated current, and the rated capacity C0 of the energy storage power supply 1. It represents the SOC value corresponding to the amount of battery charge lost by the electronic components inside the energy storage power supply 1 during sleep mode with a certain static self-dissipation power.

[0087] The rate factor is the ratio between the deviation SOC and the correction time, representing the correction rate per unit time during the correction of the first SOC.

[0088] The fourth SOC is 100% minus the deviation SOC. It represents the SOC value of the remaining battery capacity after the energy storage power supply 1 is fully charged but before meeting the float charging conditions, due to the battery's internal static self-dissipation power loss. For example, if the deviation SOC is 4%, then the fourth SOC is 96%.

[0089] In the above embodiments, the fourth SOC can be obtained based on the deviation SOC to determine the float charging condition. This allows the charger to charge the energy storage power supply 1 when the fourth SOC meets the float charging condition, and the charger not to charge the energy storage power supply 1 when the fourth SOC does not meet the float charging condition.

[0090] Furthermore, referring to Figures 6 and 7, in some embodiments, step S5 includes:

[0091] Step S51: Obtain the sleep time and rated current;

[0092] Step S53: Obtain the deviation SOC based on the sleep time and rated current.

[0093] Specifically, the sleep time refers to the duration during which the energy storage power supply 1 remains in a sleep state before meeting the float charging conditions. The rated current refers to the discharge current measured in standardized tests of the internal components of the energy storage power supply 1 in a sleep state.

[0094] The deviation SOC is the ratio between the product of the sleep time and the rated current and the rated capacity C0 of the energy storage power supply 1. For example, if the rated current is 20mA, the sleep time is 40h, and the rated capacity C0 is 10A·h, then the deviation SOC is 8%.

[0095] In the above embodiments, by obtaining the sleep time and rated current, and combining them with the rated capacity C0 of the energy storage power supply 1, the deviation SOC can be accurately calculated, thereby improving the effectiveness of correction when correcting the first SOC.

[0096] Furthermore, referring to Figures 8 and 9, in some embodiments, step 5 includes:

[0097] Step S5a: Determine the actual SOC of the energy storage power supply 1 based on the cell voltage of the energy storage power supply 1, and obtain the deviation SOC based on the actual SOC.

[0098] Specifically, the BMS can monitor the cell voltage of energy storage power supply 1, obtain the current cell voltage value, and determine the actual SOC of energy storage power supply 1 based on the collected voltage value using a preset SOC-voltage correspondence (such as through table lookup or calculation). The deviation SOC can be determined based on the actual SOC. For example, if the monitored SOC value corresponding to the cell voltage of energy storage power supply 1 is 97%, then the deviation SOC is the difference between 100% and 97%, which is 3%.

[0099] In the above embodiments, by obtaining the cell voltage of the energy storage power supply 1, the deviation SOC can be accurately calculated, thereby improving the effectiveness of correction when correcting the first SOC.

[0100] Please refer to Figure 10. A control device 2 according to an embodiment of this application includes a processor 22 and a memory 21. The memory 21 stores a computer program. When the computer program is executed by the processor 22, it implements the steps of the control method of any of the above embodiments.

[0101] Please refer to Figure 10. An energy storage power supply 1 according to an embodiment of this application includes the control device 2 described in the above embodiment. Specifically, the energy storage power supply 1 includes a battery module 3, and the control device 2 is electrically connected to the battery module 3. The control device 2 can be located in the BMS, or can be connected to the BMS via wired or wireless communication.

[0102] This application provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor 22, implements the steps of the control method described in any of the above embodiments.

[0103] In some implementations, when the computer program is executed by the processor 22, the control method includes:

[0104] Step S1: When the energy storage power supply 1 is disconnected from the charger and under load, obtain the load current and load time of the energy storage power supply 1.

[0105] Step S3: Obtain the correction time of energy storage power supply 1;

[0106] Step S5: Obtain the deviation SOC of energy storage power supply 1;

[0107] Step S7: Determine the speed factor based on the ratio of deviation SOC to correction time;

[0108] Step S9: Obtain the first SOC of energy storage power supply 1 based on the load current, speed factor and load time until the load time reaches the correction time.

[0109] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0110] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more steps for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0111] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, combinations, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A control method for an energy storage power source, the energy storage power source displaying a first state of charge, characterized in that, The control method includes: When the energy storage power supply is disconnected from the charger and under load, the load current and load time of the energy storage power supply are obtained. Obtain the correction time of the energy storage power source; Obtain the deviation state of charge of the energy storage power source; The speed factor is determined based on the ratio of the deviation state of charge to the correction time; The first state of charge of the energy storage power source is obtained based on the load current, the speed factor, and the load time until the load time reaches the correction time.

2. The control method according to claim 1, characterized in that, The correction time for obtaining the energy storage power source includes: The correction time of the energy storage power supply is obtained based on the load current, and the correction time is negatively correlated with the load current.

3. The control method according to claim 2, characterized in that, There is a preset mapping relationship between the correction time and the load current.

4. The control method according to claim 3, characterized in that, The preset mapping relationship is related to the rated capacity of the energy storage power source.

5. The control method according to claim 4, characterized in that, The preset mapping relationship includes at least one of the following: When the load current is less than 0.5 times the rated capacity, the correction time is 8 minutes; When the load current is greater than or equal to 0.5 times the rated capacity and less than or equal to 1 times the rated capacity, the correction time is 4 minutes; When the load current is greater than 1 times the rated capacity, the correction time is 2 minutes.

6. The control method according to any one of claims 1-5, characterized in that, Obtaining the first state of charge of the energy storage power source based on the load current, the speed factor, and the load time includes: The second state of charge is obtained based on the velocity factor and the load time; The third state of charge is obtained based on the load current and the load time. The first charge state is obtained based on the second charge state and the third charge state.

7. The control method according to claim 6, characterized in that, The velocity factor is the ratio of the deviation state of charge to the correction time.

8. The control method according to claim 6 or 7, characterized in that, The second state of charge is the product of the load time and the speed factor, and / or the third state of charge is the ratio between the product of the load time and the load current and the rated capacity of the energy storage power source.

9. The control method according to any one of claims 1-8, characterized in that, The control method includes: When the energy storage power supply is connected to the charger, the fourth state of charge of the energy storage power supply is obtained; When the fourth state of charge meets the float charging conditions, the charger is controlled to charge the energy storage power source.

10. The control method according to any one of claims 1-9, characterized in that, The control method includes: When the energy storage power supply is connected to the charger, the fourth state of charge of the energy storage power supply is obtained; If the fourth state of charge does not meet the float charging conditions, the charger is controlled to stop charging the energy storage power source.

11. The control method according to claim 9 or 10, characterized in that, The float charge condition includes a fourth state of charge that is less than or equal to a set value.

12. The control method according to claim 11, characterized in that, The set value is greater than or equal to 90% and less than or equal to 95%.

13. The control method according to any one of claims 9-12, characterized in that, When the energy storage power supply is connected to the charger, obtaining the fourth state of charge of the energy storage power supply includes: Obtain the deviation state of charge of the energy storage power source; The fourth charge state is obtained based on the deviation charge state.

14. The control method according to any one of claims 1-13, characterized in that, Obtaining the offset state of charge of the energy storage power source includes: Obtain the sleep time and rated current of the energy storage power supply; The offset state of charge is obtained based on the sleep time and the rated current.

15. The control method according to claim 14, characterized in that, The deviated state of charge is the ratio between the product of the dormancy time and the rated current and the rated capacity of the energy storage power source.

16. The control method according to any one of claims 1-13, characterized in that, Obtaining the offset state of charge of the energy storage power source includes: The actual state of charge of the energy storage power source is determined based on the cell voltage of the energy storage power source, and the deviation state of charge is obtained based on the actual state of charge.

17. The control method according to claim 16, characterized in that, The actual state of charge of the energy storage power source is determined based on the cell voltage of the energy storage power source and the preset correspondence between the state of charge and voltage.

18. A control device for an energy storage power source, characterized in that, include: Processor, and; A memory storing a computer program, which, when executed by the processor, implements the steps of the control method according to any one of claims 1-17.

19. An energy storage power source, characterized in that, Includes the control device as described in claim 18.

20. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the control method according to any one of claims 1-17.

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