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

Abstract

The invention discloses a control method of an energy storage power supply, the energy storage power supply, a control device and a storage medium. The control method comprises the steps that under the condition that an energy storage power supply is externally connected with load equipment, the energy storage power supply is controlled to supply power to the load equipment so that the load equipment can be started, peak electric parameters of the started load equipment are obtained, and the peak electric parameters comprise peak current and / or peak power; when the peak electric parameter is smaller than or equal to the preset electric parameter of the energy storage power supply, controlling the energy storage power supply to supply power to the load equipment; and when the peak electric parameter is greater than the preset electric parameter of the energy storage power supply, controlling the energy storage power supply to stop supplying power to the load equipment. According to the control method, adverse effects on the energy storage power supply caused by continuous power supply to the load equipment under the condition that the peak electric parameter of the load equipment is greater than the preset electric parameter of the energy storage power supply can be avoided to a certain extent, so that the energy storage power supply is effectively protected.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage power supplies, and particularly to a control method for an energy storage power supply, an energy storage power supply, a control device, and a storage medium. Background Art

[0002] Mobile portable energy storage power supplies are required to be applied in a wider and wider range of fields. Whether in high temperature or low temperature, good performance needs to be demonstrated. However, the application of lithium batteries is affected by the environment, and there are obvious differences in performance and characteristics. Especially in a low-temperature environment, many devices need to use an energy storage power supply as an external power source to start the device at low temperature. Specifically, when starting a device as an external power source, the energy storage power supply usually operates at a reduced power. However, in the case of a relatively large peak current when starting a device, it will have an adverse impact on the energy storage power supply. Summary of the Invention

[0003] Embodiments of the present invention provide a control method, an energy storage power supply, a control device, and a storage medium to solve at least one of the above-mentioned technical problems.

[0004] A control method for an energy storage power supply according to an embodiment of the present invention includes:

[0005] When the energy storage power supply is externally connected to a load device, controlling the energy storage power supply to supply power to the load device to turn on the load device, and obtaining the peak electrical parameters of the turned-on load device, where the peak electrical parameters include peak current and / or peak power;

[0006] When the peak electrical parameter is less than or equal to a preset electrical parameter of the energy storage power supply, controlling the energy storage power supply to continue supplying power to the load device;

[0007] When the peak electrical parameter is greater than the preset electrical parameter of the energy storage power supply, controlling the energy storage power supply to stop supplying power to the load device.

[0008] In the above control method, without changing the structure of the energy storage power supply, according to the magnitude relationship between the peak electrical parameters of the load device and the preset electrical parameters of the energy storage power supply, controlling the energy storage power supply to supply power to or stop supplying power to the load device can, to a certain extent, avoid the adverse impact on the energy storage power supply caused by continuing to supply power to the load device when the peak electrical parameters of the load device are greater than the preset electrical parameters of the energy storage power supply, thereby effectively protecting the energy storage power supply.

[0009] In some embodiments, the control method includes:

[0010] Determining the preset electrical parameter of the energy storage power supply according to the current ambient temperature and state of charge of the energy storage power supply.

[0011] In some embodiments, when the energy storage power supply is externally connected to a load device, controlling the energy storage power supply to supply power to the load device to turn on the load device includes: in a first stage after the load device is turned on, controlling the output electrical parameters of the energy storage power supply to reach the preset electrical parameters to supply power to the load device;

[0012] When the peak electrical parameter is less than or equal to the preset electrical parameter of the energy storage power supply, controlling the energy storage power supply to continue supplying power to the load device includes:

[0013] In a second stage after the first stage, when the peak electrical parameter is less than or equal to the preset electrical parameter of the energy storage power supply, controlling the energy storage power supply to supply power to the load device with an electrical parameter less than the preset electrical parameter;

[0014] When the peak electrical parameter is greater than the preset electrical parameter of the energy storage power supply, controlling the energy storage power supply to stop supplying power to the load device includes:

[0015] In a second stage after the first stage, when the peak electrical parameter is greater than the preset electrical parameter of the energy storage power supply, controlling the energy storage power supply to stop supplying power to the load device.

[0016] In some embodiments, the duration of the first stage is less than a limit duration, and the limit duration is the longest duration set for the energy storage power supply to operate at the preset electrical parameter.

[0017] In some embodiments, the limit duration is 9 seconds to 11 seconds, and the duration of the first stage is 3 seconds to 8 seconds.

[0018] In some embodiments, the control method includes:

[0019] Determining the limit power value of the energy storage power supply according to the current ambient temperature and state of charge of the energy storage power supply;

[0020] After a set duration at the start of the second stage, when the rated power value of the load device is greater than the limit power value of the energy storage power supply, controlling the energy storage power supply to stop supplying power to the load device;

[0021] After a set duration at the start of the second stage, when the rated power value of the load device is not greater than the limit power value of the energy storage power supply, controlling the energy storage power supply to continue supplying power to the load device.

[0022] In some embodiments, the limit power value of the energy storage power supply is negatively correlated with the ambient temperature and state of charge of the energy storage power supply.

[0023] In some embodiments, the control method includes:

[0024] When the ambient temperature of the energy storage power supply exceeds the protection temperature range, control the energy storage power supply to stop supplying power to the load device.

[0025] An energy storage power supply according to an embodiment of the present invention includes a control device, a battery module, and an inverter. The control device is electrically connected to the battery module and the inverter. The control device is configured to:

[0026] When the energy storage power supply is externally connected to a load device, control the inverter and the battery module to supply power to the load device to turn on the load device, and obtain the peak electrical parameters of the turned-on load device. The peak electrical parameters include peak current and / or peak power;

[0027] When the peak electrical parameter is less than or equal to the preset electrical parameter of the energy storage power supply, control the inverter and the battery module to continue supplying power to the load device;

[0028] When the peak electrical parameter is greater than the preset electrical parameter of the energy storage power supply, control the inverter and the battery module to stop supplying power to the load device.

[0029] A control device according to an embodiment of the present invention includes:

[0030] A processor, and;

[0031] A memory, the memory stores a computer program, and when the computer program is executed by the processor, the steps of the control method according to any of the above embodiments are implemented.

[0032] An energy storage power supply according to an embodiment of the present invention includes the above control device.

[0033] An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by the processor, the steps of the control method according to any of the above embodiments are implemented.

[0034] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

[0036] Figures 1 to 3 is a flowchart of the control method according to an embodiment of the present invention;

[0037] Figure 4It is a schematic diagram of a module of the energy storage power supply according to an embodiment of the present invention;

[0038] Figure 5 It is another schematic diagram of a module of the energy storage power supply according to an embodiment of the present invention;

[0039] Figure 6 It is the correspondence between the ambient temperature and the state of charge and the preset electrical parameters and the power limit value according to an embodiment of the present invention;

[0040] Figure 7 It is a schematic diagram of the electrical parameters output by the energy storage power supply according to an embodiment of the present invention;

[0041] Figure 8 It is another schematic diagram of the electrical parameters output by the energy storage power supply according to an embodiment of the present invention.

[0042] Description of main component symbols:

[0043] Energy storage power supply 1, control device 2, memory 21, processor 22, battery module 3, inverter 4. Specific embodiments

[0044] The following details the embodiments of the present invention. The examples of the embodiments are shown in the 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 drawings are exemplary and are only used to explain the embodiments of the present invention and should not be construed as a limitation on the embodiments of the present invention.

[0045] Please refer to Figure 1 and Figure 4 and Figure 5 , a control method for an energy storage power supply 1 according to an embodiment of the present invention includes:

[0046] Step S1, when the energy storage power supply 1 is externally connected to a load device, control the energy storage power supply 1 to supply power to the load device to turn on the load device, and obtain the peak electrical parameters of the turned-on load device. The peak electrical parameters include peak current and / or peak power;

[0047] Step S3, when the peak electrical parameters are less than or equal to the preset electrical parameters of the energy storage power supply 1, control the energy storage power supply 1 to continue supplying power to the load device;

[0048] Step S5, when the peak electrical parameters are greater than the preset electrical parameters of the energy storage power supply 1, control the energy storage power supply 1 to stop supplying power to the load device.

[0049] In the above control method, without changing the structure of the energy storage power supply 1, according to the magnitude relationship between the peak electrical parameters of the load device and the preset electrical parameters of the energy storage power supply 1, the energy storage power supply 1 is controlled to supply power to the load device or stop supplying power to the load device, which can, to a certain extent, avoid the adverse impact on the energy storage power supply 1 caused by continuously supplying power to the load device when the peak electrical parameters of the load device are greater than the preset electrical parameters of the energy storage power supply 1, thereby effectively protecting the energy storage power supply 1.

[0050] Specifically, the energy storage power supply 1 is a device that can store electrical energy and supply power to the load device when the load device needs electrical energy.

[0051] The load device is a device that needs electrical energy to drive for normal operation. The load device may include, but is not limited to, handheld devices, household appliances (such as air conditioners, refrigerators, washing machines, etc.), electronic series, electric tools for field work, polar exploration, and rescue equipment for special places, etc.

[0052] It should be noted that since it is necessary to overcome static friction, establish an initial electromagnetic field, or accelerate rotating components when starting the load device, the electrical energy required by the load device when starting is greater than the electrical energy required during normal operation.

[0053] In the related art, when using the energy storage power supply to start the load device, when the current required by the load device during startup is relatively large, that is, when the power required by the load device during startup is relatively large, the energy storage power supply may not be able to meet the startup requirements of the load device. Especially in extreme working conditions (such as low-temperature conditions), the discharge capacity of the energy storage power supply decreases. When using the energy storage power supply to start the load device, when encountering a relatively large peak current during the startup of the load device, it may have an adverse impact on the energy storage power supply.

[0054] In the embodiment of the present invention, when the peak electrical parameters of the load device are less than or equal to the preset electrical parameters of the energy storage power supply 1, that is, when the energy storage power supply 1 can meet the startup requirements of the load device, the energy storage power supply 1 is controlled to continue supplying power to the load device; when the peak electrical parameters of the load device are greater than the preset electrical parameters of the energy storage power supply 1, that is, when the energy storage power supply 1 cannot meet the startup requirements of the load device, the energy storage power supply 1 is controlled to stop supplying power to the load device.

[0055] The peak electrical parameters of the load device may include peak current and / or peak power. The peak current refers to the peak value of the instantaneous current flowing through the load device instantaneously when starting. The peak power refers to the peak power corresponding to the peak current, and the peak power can be obtained according to the peak current and the resistance of the load device.

[0056] The preset electrical parameters of the energy storage power supply 1 may include the first output current and / or the first output power. The first output current refers to the maximum value that the current output by the energy storage power supply 1 can reach. The first output power of the energy storage power supply 1 refers to the first output power corresponding to the first output current, and the first output power can be obtained according to the first output current and the resistance of the load device.

[0057] In one embodiment, after the energy storage power supply 1 is externally connected to a load device, the electrical parameters output by the energy storage power supply 1 can be made to reach the preset electrical parameters according to the determined preset electrical parameters to supply power to the load device, that is, the electrical parameters output by the energy storage power supply 1 are made to reach the maximum value that can be reached to supply power to the load device.

[0058] In one embodiment, after the electrical parameters output by the energy storage power supply 1 reach the preset electrical parameters and the peak electrical parameters of the load device are obtained, the energy storage power supply 1 can be controlled to supply power to the load device or stop supplying power to the load device according to the magnitude between the first output current and the peak current, and / or the magnitude between the first output power and the peak power.

[0059] In some embodiments, the control method includes:

[0060] Determine the preset electrical parameters of the energy storage power supply 1 according to the current ambient temperature and state of charge of the energy storage power supply 1.

[0061] In the above embodiments, according to the current ambient temperature and state of charge of the energy storage power supply 1, the preset electrical parameters of the energy storage power supply 1 can be determined, so as to determine the maximum electrical parameters that the energy storage power supply 1 can currently output.

[0062] Specifically, the state of charge (SOC, State of Charge) represents the percentage of the current capacity of the energy storage power supply 1, that is, the ratio of the available energy to the total energy in the energy storage power supply 1.

[0063] It should be understood that the current ambient temperature and state of charge of the energy storage power supply 1 can affect the discharge capacity of the energy storage power supply 1. Too low ambient temperature may cause the discharge capacity of the energy storage power supply 1 to decrease. The lower the state of charge, that is, the lower the available energy in the energy storage power supply 1, may cause the discharge capacity of the energy storage power supply 1 to decrease.

[0064] In one embodiment, multiple sets of data of peak electrical parameters and preset electrical parameters can be obtained through experimental tests at different ambient temperatures and different states of charge, and the relationship between the ambient temperature and state of charge and the preset electrical parameters can be set based on the data according to experience.

[0065] Based on the set relationship between the ambient temperature and state of charge and the preset electrical parameters, the preset electrical parameters of the energy storage power supply 1 can be determined according to the current ambient temperature and state of charge of the energy storage power supply 1.

[0066] In one embodiment, during experimental testing, the energy storage power supply 1 is externally connected to a load device to supply power to the load device to turn on the load device. The first output current and the first output power can be calculated, and the peak electrical parameters of the load device can be read.

[0067] In one embodiment, during experimental testing, the peak value I of the first output current is calculated pc The specific formula is as follows:

[0068] I pc =V m / R

[0069] Where, V m is the battery voltage of the energy storage power supply 1 after discharging for a certain period of time, V m > under-voltage, and R is the resistance of the load device.

[0070] The under-voltage is the lowest voltage value at which the energy storage power supply 1 can work normally during the discharging process. In one embodiment, when V m ≤ under-voltage, the energy storage power supply 1 triggers under-voltage protection and the energy storage power supply 1 stops working.

[0071] In one embodiment, during experimental testing, the peak value P of the first output power is calculated pp The specific formula is as follows:

[0072] P pp ==V m 2 / R

[0073] Where, V m is the battery voltage of the energy storage power supply 1 after discharging for a certain period of time, V m > under-voltage, and R is the resistance of the load device.

[0074] In Figure 6 this embodiment, the energy storage power supply 1 is a lithium battery energy storage power supply, and the number of battery strings n of the energy storage power supply 1 satisfies 4 ≤ n ≤ 14.

[0075] When the ambient temperature T satisfies -10°C ≤ T ≤ 45°C and the state of charge SOC satisfies 0% < SOC ≤ 100%, the peak value of the first output current is 4.0C0, and the peak value of the first output power is 4.0P0. Here, C0 represents the rated capacity of the energy storage power supply 1, and P0 is the rated power of the energy storage power supply 1. The rated capacity and rated power of the energy storage power supply 1 are the total capacity and total power measured under specified conditions after all the battery cells of the energy storage power supply 1 leave the factory or undergo standardized tests. The rated power is the product of the rated capacity and the rated voltage of the energy storage power supply 1. The unit of the rated capacity can be ampere-hour (A·h), and the unit of the rated power can be watt-hour (W·h). In an example, the rated capacity of the energy storage power supply 1 is 5 A·h, the rated voltage is 3.2 volts (V), the rated power is 16 W·h, the peak value of the first output current is 4.0C0, and the peak value of the first output power is 4.0P0. Then the first output current is 20 amperes (A), and the first output power is 64 watts (W).

[0076] When the ambient temperature T satisfies -15°C ≤ T < -10°C and the state of charge SOC satisfies 60% ≤ SOC ≤ 100%, the peak value of the first output current is 3.0C0, and the peak value of the first output power is 3.0P0.

[0077] When the ambient temperature T satisfies -15°C ≤ T < -10°C and the state of charge SOC satisfies 30% ≤ SOC < 60%, the peak value of the first output current is 2.0C0, and the peak value of the first output power is 2.0P0.

[0078] When the ambient temperature T satisfies -15°C ≤ T < -10°C and the state of charge SOC satisfies 0% < SOC < 30%, the peak value of the first output current is 1.5C0, and the peak value of the first output power is 1.5P0.

[0079] When the ambient temperature T satisfies -20°C ≤ T < -15°C and the state of charge SOC satisfies 60% ≤ SOC ≤ 100%, the peak value of the first output current is 2.0C0, and the peak value of the first output power is 2.0P0.

[0080] When the ambient temperature T satisfies -20°C ≤ T < -15°C and the state of charge SOC satisfies 30% ≤ SOC < 60%, the peak value of the first output current is 1.5C0, and the peak value of the first output power is 1.5P0.

[0081] When the ambient temperature T satisfies -20°C ≤ T < -15°C and the state of charge SOC satisfies 0% < SOC < 30%, the peak value of the first output current is 1.0C0, and the peak value of the first output power is 1.0P0.

[0082] In some embodiments, please combine Figure 2 , step S1 includes:

[0083] Step S11, in the first stage after the load device is turned on, control the output electrical parameters of the energy storage power supply 1 to reach the preset electrical parameters to supply power to the load device;

[0084] Step S3 includes:

[0085] Step S31, in the second stage after the first stage, when the peak electrical parameter is less than or equal to the preset electrical parameter of the energy storage power supply 1, control the energy storage power supply 1 to supply power to the load device with an electrical parameter less than the preset electrical parameter;

[0086] Step S5 includes:

[0087] Step S51, in the second stage after the first stage, when the peak electrical parameter is greater than the preset electrical parameter of the energy storage power supply 1, control the energy storage power supply 1 to stop supplying power to the load device.

[0088] In the above embodiment, in the first stage after the load device is turned on, controlling the output electrical parameters of the energy storage power supply 1 to reach the preset electrical parameters to supply power to the load device can, to a certain extent, improve the startup success rate of the load device.

[0089] Specifically, in the first stage after the load device is turned on, the energy storage power supply 1 reaches the preset electrical parameter and continuously supplies power to the load device with the preset electrical parameter, that is, when reaching the maximum value that the electrical parameter output by the energy storage power supply 1 can reach, continuously supplying power to the load device with the preset electrical parameter can, to a certain extent, improve the startup success rate of the load device; in the second stage after the first stage, the energy storage power supply 1 can be controlled to supply power to the load device with an electrical parameter less than the preset electrical parameter, or stop supplying power to the load device, which can, to a certain extent, avoid supplying power to the load device with the preset electrical parameter for a long time, resulting in over-discharging of the energy storage power supply 1 due to overloading and causing the power to jump to 0 or the voltage to drop to the undervoltage state.

[0090] In some embodiments, the duration of the first stage is less than the limit duration, and the limit duration is the longest duration set for the energy storage power supply 1 to work with the preset electrical parameter.

[0091] In the above embodiment, the duration of the first stage being less than the limit duration can make the duration of the first stage of the energy storage power supply 1 less than the limit duration, thereby avoiding the adverse effect on the energy storage power supply 1 caused by the duration of working with the preset electrical parameter exceeding the limit duration.

[0092] Specifically, different energy storage power supplies 1 correspond to different limit durations, which can be determined by methods such as experimental testing and simulation analysis.

[0093] In the first stage of the energy storage power supply 1, that is, within the first stage after the load device is turned on, the energy storage power supply 1 supplies power to the load device with preset electrical parameters, that is, the energy storage power supply 1 supplies power to the load device with the maximum electrical parameters that can be output currently. The limited duration is the longest duration set for the energy storage power supply 1 to work with preset electrical parameters, that is, when the continuous duration of the energy storage power supply 1 working with preset electrical parameters exceeds the limited duration, it may have an adverse impact on the energy storage power supply 1.

[0094] In some embodiments, please combine Figure 7 and Figure 8 , the limited duration is 9 seconds to 11 seconds, and the continuous duration of the first stage is 3 seconds to 8 seconds.

[0095] In the above embodiments, the continuous duration of the first stage is 3 seconds to 8 seconds. On the one hand, it can extend the time for the energy storage power supply 1 to supply power to the load device with preset electrical parameters to a certain extent, thereby improving the startup success rate of the load device. On the other hand, it can avoid supplying power to the load device with preset electrical parameters for a long time to a certain extent, thereby preventing the energy storage power supply 1 from being overloaded and discharged, resulting in the battery power jumping to 0 or the voltage dropping to the undervoltage state.

[0096] Specifically, after the energy storage power supply 1 is externally connected to the load device and the load device is turned on, when the electrical parameters output by the energy storage power supply 1 reach the preset electrical parameters, the energy storage power supply 1 is controlled to continuously supply power to the load device with the preset electrical parameters. After the first stage of the load is turned on, that is, in the second stage after the first stage, according to the magnitude relationship between the peak electrical parameters of the load device and the preset electrical parameters of the energy storage power supply 1, the energy storage power supply 1 is controlled to supply power to the load device with smaller electrical parameters, or stop supplying power to the load device.

[0097] In Figure 7 's embodiment, after the load device is turned on for 2 seconds to 3 seconds, the current output by the energy storage power supply 1 can reach the first output current. When the first output current is reached, the battery voltage of the energy storage power supply 1 drops rapidly, causing the energy storage power supply 1 to supply power to the load device with a current smaller than the first output current, and the battery voltage of the energy storage power supply 1 gradually rises and recovers. Among them, the dotted line is the current output by the energy storage power supply 1, and the solid line is the battery voltage of the energy storage power supply 1.

[0098] In Figure 8 's embodiment, the undervoltage of the energy storage power supply 1 is 2.3 volts (V). After the load device is turned on for 2 seconds to 3 seconds, the current output by the energy storage power supply 1 can reach the first output current, causing the energy storage power supply 1 to continuously work with the first output current. After the load device is turned on for 9 seconds to 11 seconds, the battery voltage of the energy storage power supply 1 drops to the undervoltage, triggering undervoltage protection. It can be understood that the limited duration is 9 seconds to 11 seconds. Among them, the dotted line is the current output by the energy storage power supply 1, and the solid line is the battery voltage of the energy storage power supply 1.

[0099] It is understandable that the duration of the first stage includes the arrival duration of the preset electrical parameters.

[0100] In Figure 7 and Figure 8 embodiments, the arrival duration of the preset electrical parameters is greater than or equal to 2 seconds (s) and less than or equal to 3 s.

[0101] Optionally, the duration of the first stage can be greater than the arrival duration of the preset electrical parameters. In one example, if the arrival duration of the preset electrical parameters is 3 s, then the duration of the first stage is greater than 3 s and less than or equal to 8 s. In one example, if the arrival duration of the preset electrical parameters is 2 s, then the duration of the first stage is greater than or equal to 3 s and less than or equal to 8 s.

[0102] In some examples, the duration t1 of the first stage is equal to 3 s, 4 s, 5 s, 6 s, 7 s, 8 s or other values satisfying 3 s ≤ t1 ≤ 8 s.

[0103] In certain embodiments, in combination with Figure 3 , the control method includes:

[0104] Step S21, determining the power limit value of the energy storage power supply 1 according to the current ambient temperature and state of charge of the energy storage power supply 1;

[0105] Step S22, after the set duration at the start of the second stage, when the rated power value of the load device is greater than the power limit value of the energy storage power supply 1, controlling the energy storage power supply 1 to stop supplying power to the load device;

[0106] Step S23, after the set duration at the start of the second stage, when the rated power value of the load device is not greater than the power limit value of the energy storage power supply 1, controlling the energy storage power supply 1 to continue supplying power to the load device.

[0107] In the above embodiments, after the set duration at the start of the second stage, according to the magnitude relationship between the power limit value and the rated power of the load device, controlling the energy storage power supply 1 to continue supplying power to the load device or stop supplying power to the load device can, to a certain extent, avoid adverse effects on the energy storage power supply 1 caused by continuing to supply power to the load device when the rated power of the load device is greater than the limit power of the energy storage power supply 1, thereby effectively protecting the energy storage power supply 1.

[0108] Specifically, the power limit value refers to the maximum power value at which the energy storage power supply 1 can operate normally for a long time.

[0109] In one embodiment, multiple sets of data of the power limit values can be obtained through experimental tests at different ambient temperatures and different states of charge, and the relationship between the ambient temperature, state of charge and power limit value can be set based on the data according to experience.

[0110] Based on the relationship between the set environmental temperature, state of charge, and power limit value, the power limit value of the energy storage power supply 1 can be determined according to the current environmental temperature and state of charge of the energy storage power supply 1. Then, according to the magnitude relationship between the power limit value and the rated power of the load device, the energy storage power supply 1 is controlled to continue supplying power to the load device or stop supplying power to the load device.

[0111] It should be understood that after the set duration at the start of the second stage, the load device starts successfully and gradually enters normal operation. When the load device is in normal operation, the load device operates at its rated power. Optionally, the set duration is 10 seconds to 60 seconds.

[0112] It should be understood that when the rated power of the load device is greater than the power limit value of the energy storage power supply 1, that is, when the rated power of the load device is greater than the maximum power value at which the energy storage power supply 1 can operate normally for a long time, continuing to supply power to the load device may cause over-discharge due to overloading and have an adverse impact on the energy storage power supply 1.

[0113] In Figure 6 the embodiment, the energy storage power supply 1 is a lithium battery energy storage power supply, and the number of battery strings n of the energy storage power supply 1 satisfies 4 ≤ n ≤ 14.

[0114] When the environmental temperature T satisfies -10°C ≤ T ≤ 45°C and the state of charge SOC satisfies 0% < SOC ≤ 100%, the power limit value is 1.7P0. Wherein, P0 represents the rated power of the energy storage power supply 1. The rated power of the energy storage power supply 1 is the total power measured under specified conditions after all the battery cells of the energy storage power supply 1 leave the factory or undergo standardized tests. The rated power is the product of the rated capacity and the rated voltage of the energy storage power supply 1. The unit of the rated power can be watt-hour (W·h). In an example, if the rated power of the energy storage power supply 1 is 100 W·h and the power limit value is 1.7P0, then the power limit value is 170 watts (W).

[0115] When the environmental temperature T satisfies -15°C ≤ T < -10°C and the state of charge SOC satisfies 60% ≤ SOC ≤ 100%, the power limit value is 1.5P0, and the energy storage power supply 1 operates at a reduced power.

[0116] When the environmental temperature T satisfies -15°C ≤ T < -10°C and the state of charge SOC satisfies 30% ≤ SOC < 60%, the power limit value is 1.0P0, and the energy storage power supply 1 operates at a reduced power.

[0117] When the environmental temperature T satisfies -15°C ≤ T < -10°C and the state of charge SOC satisfies 0% < SOC < 30%, the power limit value is 0.5P0, and the energy storage power supply 1 operates at a reduced power.

[0118] When the ambient temperature T satisfies -20°C ≤ T < -15°C and the state of charge SOC satisfies 60% ≤ SOC ≤ 100%, the power limit value is 1.0P0, and the energy storage power supply 1 is used with reduced power.

[0119] When the ambient temperature T satisfies -20°C ≤ T < -15°C and the state of charge SOC satisfies 30% ≤ SOC < 60%, the power limit value is 0.5P0, and the energy storage power supply 1 is used with reduced power.

[0120] When the ambient temperature T satisfies -20°C ≤ T < -15°C and the state of charge SOC satisfies 0% < SOC < 30%, the power limit value is 0.3P0, and the energy storage power supply 1 is used with reduced power.

[0121] In some embodiments, the control method includes:

[0122] When the ambient temperature of the energy storage power supply 1 exceeds the protection temperature range, control the energy storage power supply 1 to stop supplying power to the load device.

[0123] In the above embodiments, when the ambient temperature of the energy storage power supply 1 exceeds the protection temperature range, controlling the energy storage power supply 1 to stop supplying power to the load device can, to a certain extent, avoid adverse effects on the energy storage power supply 1 caused by continuing to supply power to the load device when the ambient temperature is too high or too low, thereby effectively protecting the energy storage power supply 1.

[0124] Specifically, the protection temperature range refers to the temperature range within which the energy storage power supply 1 can operate normally for a long time. Different energy storage power supplies 1 have different protection temperature ranges, which can be determined by methods such as experimental testing and simulation analysis. In one embodiment, the protection temperature range is greater than or equal to -20°C and less than or equal to 45°C. When the current ambient temperature of the energy storage power supply 1 is too high, that is, when the current ambient temperature is greater than 45°C, control the energy storage power supply 1 to stop supplying power to the load device to protect the energy storage power supply 1. When the current ambient temperature of the energy storage power supply 1 is too low, that is, when the current ambient temperature is less than -20°C, control the energy storage power supply 1 to stop supplying power to the load device to protect the energy storage power supply 1.

[0125] Please refer to Figure 4 , an energy storage power supply 1 according to an embodiment of the present invention includes a control device 2, a battery module 3, and an inverter 4. The control device 2 is electrically connected to the battery module 3 and the inverter 4, and the control device 2 is configured to:

[0126] When the energy storage power supply 1 is externally connected to a load device, control the inverter 4 and the battery module 3 to supply power to the load device to turn on the load device, and obtain the peak electrical parameters of the turned-on load device. The peak electrical parameters include peak current and / or peak power;

[0127] When the peak electrical parameter is less than or equal to the preset electrical parameter of the energy storage power supply 1, control the inverter 4 and the battery module 3 to continue supplying power to the load device;

[0128] When the peak electrical parameter is greater than the preset electrical parameter of the energy storage power supply 1, control the inverter 4 and the battery module 3 to stop supplying power to the load device.

[0129] In the above energy storage power supply 1, without changing the structure of the energy storage power supply 1, according to the magnitude relationship between the peak electrical parameter of the load device and the preset electrical parameter of the energy storage power supply 1, controlling the battery module 3 and the inverter 4 to supply power to or stop supplying power to the load device can, to a certain extent, avoid the adverse impact on the energy storage power supply 1 caused by continuing to supply power to the load device when the peak electrical parameter of the load device is greater than the preset electrical parameter of the energy storage power supply 1, thereby effectively protecting the energy storage power supply 1.

[0130] Specifically, the energy storage power supply 1 is a device that can store electrical energy and supply power to the load device when the load device needs electrical energy. The energy storage power supply 1 may include a control device 2, a battery module 3, an inverter 4, a battery management system (BMS), and a temperature sensor. Among them, the control device 2 can control the operation of the energy storage power supply 1 by controlling the operation of the battery module 3 and the inverter 4. The battery module 3 is a component in the energy storage power supply 1 responsible for storing electrical energy and providing electrical energy when needed. The inverter 4 is a component that can convert the direct current output by the energy storage power supply 1 into the alternating current required by the load device. The battery management system can monitor and manage parameters such as the electrical parameters and temperature of the battery module 3 and send them to the control device 2 so that the control device 2 can obtain the preset electrical parameters. The temperature sensor can real-time monitor the current ambient temperature of the energy storage power supply 1 and send it to the control device 2 so that the control device 2 can obtain the preset electrical parameters. Optionally, the correspondence relationship between the ambient temperature and the state of charge and the preset electrical parameters can be stored in the control device 2.

[0131] The load device is a device that needs electrical energy to drive for normal operation. The load device may include, but is not limited to, handheld devices, household appliances (such as air conditioners, refrigerators, washing machines, etc.), electronic series, electric tools for field work, polar exploration, and rescue equipment for special places.

[0132] It should be noted that since it is necessary to overcome static friction, establish an initial electromagnetic field, or accelerate rotating components when turning on the load device, the electrical energy required by the load device when turning on is greater than the electrical energy required during normal operation.

[0133] In the related art, when starting a load device using an energy storage power supply, in the case where the current required during the startup of the load device is relatively large, that is, in the case where the power required during the startup of the load device is relatively large, the energy storage power supply may not be able to meet the startup requirements of the load device. Especially in extreme working conditions (such as low-temperature conditions), the discharge capacity of the energy storage power supply decreases. When starting a load device using the energy storage power supply, in the case where the peak current of the load device during startup is relatively large, it may have an adverse impact on the energy storage power supply.

[0134] In an embodiment of the present invention, when the peak electrical parameter of the load device is less than or equal to the preset electrical parameter of the energy storage power supply 1, that is, when the energy storage power supply 1 can meet the startup requirements of the load device, the inverter 4 and the battery module 3 are controlled to continue supplying power to the load device; when the peak electrical parameter of the load device is greater than the preset electrical parameter of the energy storage power supply 1, that is, when the energy storage power supply 1 cannot meet the startup requirements of the load device, the inverter 4 and the battery module 3 are controlled to stop supplying power to the load device.

[0135] The peak electrical parameter of the load device may include peak current and / or peak power. The peak current refers to the peak value of the instantaneous current flowing through the load device instantaneously when it is turned on. The peak power refers to the peak power corresponding to the peak current, and the peak power can be obtained based on the peak current and the resistance of the load device.

[0136] The preset electrical parameter of the energy storage power supply 1 may include a first output current and / or a first output power. The first output current refers to the maximum value that the current output by the energy storage power supply 1 can reach. The first output power of the energy storage power supply 1 refers to the first output power corresponding to the first output current, and the first output power can be obtained based on the first output current and the resistance of the load device.

[0137] In one embodiment, after the energy storage power supply 1 is externally connected to the load device, the electrical parameter output by the energy storage power supply 1 can be made to reach the preset electrical parameter according to the determined preset electrical parameter to supply power to the load device, that is, the electrical parameter output by the energy storage power supply 1 is made to reach the maximum value that can be achieved to supply power to the load device.

[0138] In one embodiment, after the electrical parameter output by the energy storage power supply 1 reaches the preset electrical parameter and the peak electrical parameter of the load device is obtained, the inverter 4 and the battery module 3 can be controlled to supply power to the load device or stop supplying power to the load device according to the magnitude relationship between the first output current and the peak current, and / or the magnitude relationship between the first output power and the peak power.

[0139] Please refer to Figure 5, a control device 2 according to an embodiment of the present invention 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, the steps of the control method according to any of the above embodiments are implemented.

[0140] Please refer Figure 5 , an energy storage power supply 1 according to an embodiment of the present invention includes the control device 2 according to the above embodiment.

[0141] Specifically, the energy storage power supply 1 may include a battery module 3, an inverter 4, and a control device 2. The control device 2 may be electrically connected to the battery module 3 and the inverter 4 to control the battery module 3 and the inverter 4 to supply power to a load device.

[0142] An embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by the processor 22, the steps of the control method according to any of the above embodiments are implemented.

[0143] In some embodiments, when the computer program is executed by the processor 22, the implemented control method includes:

[0144] Step S1, when the energy storage power supply 1 is externally connected to a load device, control the energy storage power supply 1 to supply power to the load device to turn on the load device, and obtain the peak electrical parameters of the turned-on load device. The peak electrical parameters include peak current and / or peak power;

[0145] Step S3, when the peak electrical parameter is less than or equal to the preset electrical parameter of the energy storage power supply 1, control the energy storage power supply 1 to continue supplying power to the load device;

[0146] Step S5, when the peak electrical parameter is greater than the preset electrical parameter of the energy storage power supply 1, control the energy storage power supply 1 to stop supplying power to the load device.

[0147] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0148] Any process or method description, whether in a flowchart or otherwise described herein, can be understood to represent modules, segments, or portions of code including one or more executable actions for implementing specific logical functions or processes. The scope of the preferred embodiments of the present invention includes additional implementations where functions may be performed in a substantially simultaneous manner or in a reverse order according to the functions involved, rather than in the order shown or discussed. This should be understood by those skilled in the art to which the embodiments of the present invention pertain.

[0149] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, combinations, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for controlling an energy storage power supply, characterized in that: include: In the case where the energy storage power supply is externally connected to a load device, controlling the energy storage power supply to supply power to the load device so that the load device is turned on, and obtaining peak electrical parameters of the load device after being turned on, wherein the peak electrical parameters include peak current and / or peak power; When the peak electrical parameter is less than or equal to the preset electrical parameter of the energy storage power supply, controlling the energy storage power supply to keep supplying power to the load device; When the peak electrical parameter is greater than a preset electrical parameter of the energy storage power supply, the energy storage power supply is controlled to stop supplying power to the load device.

2. The control method according to claim 1, characterized in that: The control method comprises: The preset electrical parameters of the energy storage power supply are determined according to the current ambient temperature and charge state of the energy storage power supply.

3. The control method according to claim 1, characterized in that: In the case where the energy storage power supply is externally connected to a load device, controlling the energy storage power supply to supply power to the load device so that the load device is turned on includes: in a first stage after the load device is turned on, controlling the output electrical parameters of the energy storage power supply to reach the preset electrical parameters to supply power to the load device; When the peak electrical parameter is less than or equal to a preset electrical parameter of the energy storage power supply, controlling the energy storage power supply to keep supplying power to the load device includes: In a second stage after the first stage, when the peak electrical parameter is less than or equal to a preset electrical parameter of the energy storage power supply, controlling the energy storage power supply to supply power to the load device with an electrical parameter less than the preset electrical parameter; When the peak electrical parameter is greater than a preset electrical parameter of the energy storage power supply, controlling the energy storage power supply to stop supplying power to the load device includes: In a second stage after the first stage, when the peak electrical parameter is greater than a preset electrical parameter of the energy storage power supply, the energy storage power supply is controlled to stop supplying power to the load device.

4. The control method according to claim 3, characterized in that: The duration of the first stage is less than the limited duration, and the limited duration is the maximum duration set for the energy storage power supply to operate with the preset electrical parameters.

5. The control method according to claim 4, characterized in that: The limited time is 9 seconds to 11 seconds, and the duration of the first stage is 3 seconds to 8 seconds.

6. The control method according to claim 3, characterized in that: The control method comprises: Determining a power limit value of the energy storage power supply according to the current ambient temperature and charge state of the energy storage power supply; After the second stage starts for a set period of time, when the rated power value of the load device is greater than the limited power value of the energy storage power supply, the energy storage power supply is controlled to stop supplying power to the load device; After the second stage starts for a set period of time, when the rated power value of the load device is not greater than the limited power value of the energy storage power supply, the energy storage power supply is controlled to keep supplying power to the load device.

7. The control method according to claim 1, characterized in that: The control method comprises: When the ambient temperature of the energy storage power supply exceeds the protection temperature range, the energy storage power supply is controlled to stop supplying power to the load device.

8. An energy storage power supply, comprising a control device, a battery module and an inverter, wherein the control device is electrically connected to the battery module and the inverter, and the control device is configured as follows: In the case where the energy storage power supply is externally connected to a load device, controlling the inverter and the battery module to supply power to the load device so that the load device is turned on, and obtaining peak electrical parameters of the load device after being turned on, wherein the peak electrical parameters include peak current and / or peak power; When the peak electrical parameter is less than or equal to the preset electrical parameter of the energy storage power source, controlling the inverter and the battery module to keep supplying power to the load device; When the peak electrical parameter is greater than a preset electrical parameter of the energy storage power source, the inverter and the battery module are controlled to stop supplying power to the load device.

9. A control device for an energy storage power supply, characterized in that: include: processor, and; A memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the steps of the control method according to any one of claims 1 to 7 are implemented.

10. An energy storage power supply, characterized in that: Comprising the control device as claimed in claim 9.

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

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