Control method and control device of energy storage equipment, storage medium and energy storage equipment

Abstract

The invention discloses a control method of energy storage equipment, a control device of the energy storage equipment, a computer readable storage medium and the energy storage equipment. The energy storage equipment comprises a heating module and a battery module, the heating module is used for heating the battery module, and the control method of the energy storage equipment comprises the steps that the current state of the energy storage equipment and the current temperature of the battery module are acquired, and the current state of the energy storage equipment comprises at least one of the charging and discharging state, the remaining capacity and the current voltage; and according to the current state of the energy storage equipment and the current temperature of the battery module, controlling a heating module to work at a preset power so as to heat the battery module. According to the control method of the energy storage equipment, the heating module is controlled to be turned on and turned off according to the current temperature and the current state of the battery module, so that the battery module can be heated, normal work of the energy storage equipment under different temperature conditions can be ensured, and meanwhile the use environment of the energy storage equipment is prevented from being limited.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage devices, and particularly relates to a control method for an energy storage device, a control device for an energy storage device, a computer-readable storage medium, and an energy storage device. Background Art

[0002] For the convenience of power use, a portable energy storage device can be used to supply power in outdoor scenarios. However, the energy storage device needs to work under certain temperature conditions. When the energy storage device works in a complex and changeable outdoor environment, it may not work properly due to the environmental temperature, thereby limiting the use scenarios of the energy storage device. Summary of the Invention

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

[0004] A control method for an energy storage device provided by an embodiment of the present invention, the energy storage device includes a heating module and a battery module, the heating module is used to heat the battery module, and the control method for the energy storage device includes:

[0005] Obtain the current state of the energy storage device and the current temperature of the battery module, where the current state of the energy storage device includes at least one of a charge and discharge state, a remaining power, and a current voltage;

[0006] Control the heating module to work at a preset power according to the current state of the energy storage device and the current temperature of the battery module to heat the battery module.

[0007] In the above control method for the energy storage device, the heating module is controlled to be turned on and off according to the current temperature and the current state of the battery module, so that the battery module can be heated, which can ensure that the energy storage device works normally under different temperature conditions and avoid restricting the use environment of the energy storage device.

[0008] In some embodiments, the controlling the heating module to work at a preset power according to the current state of the energy storage device and the current temperature of the battery module to heat the battery module includes:

[0009] When the energy storage device is in a discharge state, control the heating module to work at a preset power according to the current temperature of the battery module, the remaining power, and the current voltage to heat the battery module.

[0010] In some embodiments, the preset power includes a first power, a second power, a third power, and a fourth power that increase in sequence. When the energy storage device is in a discharge state, controlling the heating module to operate at the preset power according to the current temperature, the remaining power, and the current voltage of the battery module to heat the battery module includes at least one of the following:

[0011] When the energy storage device is in a discharge state, the current temperature of the battery module is within a first temperature range, the remaining power is greater than a first power, and the current voltage is greater than a first voltage, controlling the heating module to operate at the fourth power;

[0012] When the energy storage device is in a discharge state, the current temperature of the battery module is within the first temperature range, the remaining power is greater than the first power, and the current voltage is less than or equal to the first voltage and greater than a second voltage, controlling the heating module to operate at the third power;

[0013] When the energy storage device is in a discharge state, the current temperature of the battery module is within the first temperature range, the remaining power is greater than the first power, and the current voltage is less than or equal to the second voltage and greater than a third voltage, controlling the heating module to operate at the second power;

[0014] When the energy storage device is in a discharge state, the current temperature of the battery module is within the first temperature range, the remaining power is greater than the first power, and the current voltage is less than the third voltage, controlling the heating module to operate at the first power.

[0015] In some embodiments, when the energy storage device is in a discharge state, controlling the heating module to operate at the preset power according to the current temperature, the remaining power, and the current voltage of the battery module to heat the battery module includes:

[0016] When the energy storage device is in a discharge state, the current temperature of the battery module is within a second temperature range, the remaining power is greater than a second power, and the current voltage is greater than a third voltage, controlling the heating module to operate at the second power;

[0017] When the energy storage device is in a discharge state, the current temperature of the battery module is within the second temperature range, the remaining power is greater than the second power, and the current voltage is less than or equal to the third voltage, controlling the heating module to operate at the first power.

[0018] In some embodiments, after the step of controlling the heating module to operate at a preset power to heat the battery module according to the current temperature, the remaining power, and the current voltage of the battery module when the energy storage device is in a discharging state, the control method of the energy storage device includes:

[0019] When the current temperature of the battery module is greater than the first operating temperature, controlling the discharge switch of the battery module to turn on, and / or;

[0020] When the current temperature of the battery module is greater than the second operating temperature, controlling the heating module to turn off.

[0021] In some embodiments, the controlling the heating module to operate at a preset power to heat the battery module according to the current state of the energy storage device and the current temperature of the battery module includes:

[0022] When the energy storage device is in a charging state and the current temperature of the battery module is within a third temperature range, controlling the heating module to operate at the maximum power to heat the battery module.

[0023] In some embodiments, after the step of controlling the heating module to operate at the maximum power to heat the battery module when the energy storage device is in a charging state and the current temperature of the battery module is within a third temperature range, the control method of the energy storage device includes:

[0024] When the current temperature of the battery module is greater than the third operating temperature, controlling the charging switch of the battery module to turn on, and / or;

[0025] When the current temperature of the battery module is greater than the fourth operating temperature, controlling the heating module to turn off.

[0026] A control device for an energy storage device provided by an embodiment of the present invention includes a processor and a memory. The memory stores a computer program, and when the computer program is executed by the processor, the steps of the control device for the energy storage device in any of the above embodiments are implemented.

[0027] A computer-readable storage medium provided by an embodiment of the present invention stores a computer program thereon. When the computer program is executed by a processor, the steps of the control method of the energy storage device in any of the above embodiments are implemented.

[0028] An energy storage device provided by an embodiment of the present invention includes the control device for the energy storage device in the above embodiment.

[0029] In some embodiments, the energy storage device includes a heating module and a battery module. The heating module includes a heating film, and the heating film is disposed on the battery module.

[0030] In some embodiments, the heating module further includes a buck circuit. The buck circuit is electrically connected to the battery module and the heating film, and is configured to convert the input voltage of the battery module into the output voltage required by the heating film.

[0031] In the control device, computer-readable storage medium, and energy storage device of the above, according to the current temperature and current state of the battery module, the heating module is controlled to be turned on and off, so that the battery module can be heated, which can ensure the normal operation of the energy storage device under different temperature conditions and avoid restricting the use environment of the energy storage device.

[0032] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0034] Figure 1 is a flowchart of a control method for an energy storage device according to an embodiment of the present invention;

[0035] Figure 2 is a schematic circuit structure diagram of an energy storage device according to an embodiment of the present invention;

[0036] Figures 3 to 10 is a flowchart of a control method for an energy storage device according to an embodiment of the present invention;

[0037] Figure 11 is a schematic module diagram of an energy storage device according to an embodiment of the present invention.

[0038] MAIN ELEMENT SYMBOL DESCRIPTION:

[0039] Heating module 10, heating film 11, battery module 12, battery assembly 14, analog front end 16, charging switch 18,

[0040] Discharge switch 20, load 21, power regulation switch 22, control device 23, processor 24, memory 26, energy storage device 100. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where like or similar reference numerals denote like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0042] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In the description of the present invention, the meaning of "a plurality of" is two or more unless otherwise specifically defined.

[0043] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection. It may be a mechanical connection or an electrical connection. It may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0045] The disclosure of the present application provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and settings of specific examples are described herein. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art can recognize the application of other processes and / or the use of other materials.

[0046] For convenient power use, a portable energy storage device can be used to supply power in outdoor scenarios. However, the energy storage device needs to work under certain temperature conditions. When the energy storage device works in a complex and changeable outdoor environment, it may not work properly due to the environmental temperature, thus limiting the use scenarios of the energy storage device.

[0047] Please refer to Figure 1 and Figure 2 , a control method for an energy storage device 100 provided by an embodiment of the present invention. The energy storage device 100 includes a heating module 10 and a battery module 12. The heating module 10 is used to heat the battery module 12. The control method of the energy storage device 100 includes:

[0048] Step S01: Obtain the current state of the energy storage device 100 and the current temperature of the battery module 12. The current state of the energy storage device 100 includes at least one of a charge / discharge state, a remaining power, and a current voltage;

[0049] Step S03: According to the current state of the energy storage device 100 and the current temperature of the battery module 12, control the heating module 10 to work at a preset power to heat the battery module 12.

[0050] In the above control method of the energy storage device 100, the heating module 10 is controlled to be turned on and off according to the current temperature and current state of the battery module 12, so as to heat the battery module 12. In this way, it can be ensured that the energy storage device 100 works properly under different temperature conditions, and at the same time, the use environment of the energy storage device 100 is not restricted.

[0051] Specifically, the energy storage device 100 is a mobile electrical energy storage device, with a variety of input / output interfaces, capable of supplementing electrical energy through the mains power, solar panels or in-vehicle chargers, and providing AC or DC power output for various loads 21.

[0052] Due to the portability of the energy storage device 100, it can work in various outdoor environments, bringing convenience to users' electricity consumption. In one embodiment, the energy storage device 100 can be installed in a recreational vehicle to supply power to various loads 21 on the recreational vehicle.

[0053] However, when the energy storage device 100 works in a complex and changeable outdoor environment, it may not work properly due to the environmental temperature, thus limiting the usage scenarios of the energy storage device 100.

[0054] The energy storage device 100 needs to control its working temperature. In a high-temperature environment (for example, the environmental temperature ≥ 40 °C), it may accelerate the chemical reaction of the battery inside the energy storage device 100 and trigger a thermal runaway chain reaction. In a low-temperature environment (for example, the environmental temperature ≤ 0 °C), it may cause an increase in the viscosity of the electrolyte and hindered migration of lithium ions, resulting in a sudden drop in the discharge capacity. At the same time, the working temperature of the energy storage device 100 affects the performance and lifespan of the battery. Too high or too low environmental temperature will affect the charge and discharge efficiency of the battery, thus affecting the device driving ability in outdoor emergency scenarios.

[0055] Therefore, thermal management of the energy storage device 100 is required. A control method for an energy storage device 100 provided by an embodiment of the present invention, the energy storage device 100 includes a battery module 12, a heating module 10, a Battery Management System (BMS), an inverter module, an input-output interface, etc.

[0056] The battery module 12 is the core energy storage unit of the energy storage device 100. The battery module 12 includes a battery component 14, an Analog Front-End (AFE) 16, a switching circuit, etc. The battery component 14 includes, but is not limited to, ternary lithium batteries, lithium iron phosphate batteries, solid-state lithium batteries, etc. The Analog Front-End (AFE) 16 is used for basic signal acquisition, conditioning, and conversion, and is mainly responsible for converting the analog signals (such as voltage, current, temperature, etc.) of the battery pack into digital signals for subsequent processing by a digital controller (such as BMS). The switching circuit includes a charging switch 18 and a discharging switch 20. When the charging switch 18 is turned on, the battery module 12 can be charged through an external power supply; when the discharging switch 20 is turned on, the battery module 12 can supply power to an external load 21.

[0057] In one embodiment, the charging switch 18 and the discharging switch 20 include Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs).

[0058] The heating module 10 includes, but is not limited to, a heating mesh, heating wire, heating tube, or heating film 11, etc. In one embodiment, the heating module 10 includes a heating film 11, and the heating film 11 includes an insulating layer and heating wire, and the heating wire is coated between two insulating layers. Further, the heating wire can be bent to increase the heating area and heating efficiency. The heating film 11 covers the top and bottom surfaces in the installation direction of the battery module 12, which is beneficial to the uniformity of heating the battery assembly 14 and improving the heating efficiency.

[0059] The power management system is used to monitor and collect the state parameters of the energy storage battery (including but not limited to the voltage of a single battery, the temperature of the battery terminal, the current of the battery circuit, the terminal voltage of the battery pack, etc.), analyze and calculate the relevant state parameters, and effectively control the battery module 12 according to specific protection control strategies to ensure the safe and reliable operation of the entire energy storage device 100.

[0060] By the power management system collecting the current temperature of the battery module 12 and obtaining the current state of the energy storage device 100, according to the current state of the energy storage device 100 and the current temperature of the battery module 12, control the heating module 10 to work at a preset power to heat the battery module 12. The current state of the energy storage device 100 includes at least one of the charge and discharge state, remaining power, and current voltage.

[0061] Among them, the preset power is related to the current state of the energy storage device 100 and the current temperature of the battery module 12.

[0062] The charge and discharge state includes the charging state and the discharging state. When the energy storage device 100 is activated and a charging signal is obtained, the energy storage device 100 is in the charging state; when the energy storage device 100 is activated and there is no charging signal, the energy storage device 100 is in the discharging state. It can be understood that the energy storage device 100 includes a working state of charging and discharging simultaneously. As long as the energy storage device 100 obtains a charging signal, the energy storage device 100 is in the charging state.

[0063] The remaining power is the SOC (State of Charge) collected by the power management system.

[0064] The current voltage is the voltage value between the positive and negative electrodes of the battery module 12.

[0065] The current temperature of the battery module 12 is the surface temperature of the battery module 12. In one embodiment, by setting an NTC (Negative Temperature Coefficient Sensor) temperature sensor on the battery module 12, the current temperature of the battery module 12 is obtained.

[0066] Please refer toFigure 3 , in some embodiments, step S03 includes:

[0067] Step S031: When the energy storage device 100 is in a discharging state, control the heating module 10 to operate at a preset power according to the current temperature, remaining power, and current voltage of the battery module 12 to heat the battery module 12.

[0068] In this way, when in the discharging state, the heating module 10 can be controlled to operate according to the current temperature, remaining power, and current voltage of the battery module 12, so as to ensure that the energy storage device 100 works stably and reliably in the discharging state.

[0069] Specifically, when the energy storage device 100 is in a discharging state, the power of the energy storage device 100 is limited, so it is necessary to maintain the balance between power supply and heating power consumption.

[0070] The energy storage device 100 needs to discharge at a certain temperature or above. Therefore, when it is obtained that the energy storage device 100 is in a discharging state, first judge the current temperature of the battery module 12, and discharge when the temperature required for discharging is met, which is conducive to ensuring that the energy storage device 100 works stably and reliably in the discharging state.

[0071] In some embodiments, the energy storage device 100 needs to discharge in an environment above -20°C. When it is obtained that the energy storage device 100 is in a discharging state, first judge the current temperature of the battery module 12. When the current temperature of the battery module 12 is above -20°C, control the discharge switch 20 to open. At this time, the battery module 12 can supply power to the external load 21. At the same time, the battery module 12 releases heat during power supply, which can keep its current temperature above -20°C, thus avoiding too low temperature during discharge and having an adverse impact on the battery module 12.

[0072] Please refer to Figure 4 , in some embodiments, the preset power includes a first power, a second power, a third power, and a fourth power that increase in sequence. Step S031 includes at least one of the following:

[0073] Step S0311: When the energy storage device 100 is in a discharging state, the current temperature of the battery module 12 is within the first temperature range, the remaining power is greater than the first power, and the current voltage is greater than the first voltage, control the heating module 10 to operate at the fourth power;

[0074] Step S0312: When the energy storage device 100 is in a discharging state, the current temperature of the battery module 12 is within the first temperature range, the remaining power is greater than the first power, and the current voltage is less than or equal to the first voltage and greater than the second voltage, control the heating module 10 to operate at the third power;

[0075] Step S0313: When the energy storage device 100 is in a discharging state, the current temperature of the battery module 12 is within the first temperature range, the remaining power is greater than the first power, and the current voltage is less than or equal to the second voltage and greater than the third voltage, control the heating module 10 to operate at the second power;

[0076] Step S0314: When the energy storage device 100 is in a discharging state, the current temperature of the battery module 12 is within the first temperature range, the remaining power is greater than the first power, and the current voltage is less than the third voltage, control the heating module 10 to operate at the first power.

[0077] In this way, when the current temperature of the battery module 12 is within the first temperature range, the operating power of the heating module 10 can be controlled according to the remaining power and the current voltage.

[0078] Specifically, in one embodiment, the heating module 10 includes a Buck buck circuit, and the buck circuit is used to convert the input voltage of the battery module 12 into the output voltage required by the heating film 11. Since the energy storage device 100 is in a discharging state, the power of the energy storage device 100 is limited, so the output voltage of the battery module 12 is limited. And the Buck buck circuit requires the input voltage of the battery module 12 to be converted into the output voltage required by the heating film 11. Therefore, the heating module 10 can be controlled to operate at different powers according to the current voltage.

[0079] A power adjustment switch 22 is provided in front of the heating film 11 of the heating module 10 to realize the selection of the heating power. The heating powers of the heating film 11 include a first power, a second power, a third power, and a fourth power that increase in sequence. In one embodiment, the first power, the second power, the third power, and the fourth power are 300W, 225W, 150W, and 75W respectively.

[0080] In one embodiment, the power adjustment switch 22 includes a MOS switch.

[0081] When the current temperature of the battery module 12 is within the first temperature range and the remaining power is greater than the first power, obtain the current voltage. When the current voltage is greater than the first voltage, control the heating module to heat at the maximum first power; when the current voltage is less than or equal to the first voltage and greater than the second voltage, control the heating module 10 to heat at the second power; when the current voltage is less than or equal to the second voltage and greater than the third voltage, control the heating module 10 to heat at the third power; when the current voltage is less than the third voltage, control the heating module 10 to heat at the fourth power.

[0082] It is understandable that, in order to ensure electrical safety and the service life of the energy storage device 100, when any one of the temperature condition, power condition, and voltage condition is not satisfied, the energy storage device 100 does not discharge, and at the same time, the heating module 10 is in the off state.

[0083] In one embodiment, the remaining power being greater than the first power includes SOC > 30%.

[0084] In one embodiment, the first voltage is 48V (volts), the second voltage is 44V, and the third voltage is 37V.

[0085] In one embodiment, the first temperature range is greater than -30°C and less than or equal to -20°C. The second temperature range is -40°C and less than or equal to -30°C.

[0086] In other embodiments, the heating module 10 can select other buck circuits, or add converters in the Buck buck circuit, etc., to avoid the limitation of the current voltage on the heating power. In this way, the heating module 10 can be controlled to work at different heating powers according to the current temperature.

[0087] Please refer to Figure 5 , in some embodiments, step S031 includes:

[0088] Step S0315: When the energy storage device 100 is in the discharge state, the current temperature of the battery module 12 is within the second temperature range, the remaining power is greater than the second power, and the current voltage is greater than the third voltage, control the heating module 10 to work at the second power;

[0089] Step S0316: When the energy storage device 100 is in the discharge state, the current temperature of the battery module 12 is within the second temperature range, the remaining power is greater than the second power, and the current voltage is less than or equal to the third voltage, control the heating module 10 to work at the first power.

[0090] In this way, when the current temperature of the battery module 12 is within the second temperature range, the working power of the heating module 10 can be controlled according to the remaining power and the current voltage.

[0091] Specifically, the minimum temperature of the first temperature range is greater than the maximum temperature of the second temperature range. When the current temperature of the battery module 12 is within the second temperature range and the remaining power is greater than the second power, obtain the current voltage. When the current voltage is greater than the third voltage, control the heating module 10 to heat at the second power; when the current voltage is less than or equal to the third voltage, control the heating module 10 to heat at the first power.

[0092] It is understandable that, in order to ensure electrical safety and the service life of the energy storage device 100, when any one of the temperature condition, power condition, and voltage condition is not met, the energy storage device 100 does not discharge, and at the same time, the heating module 10 is in the off state.

[0093] In one embodiment, the remaining power being greater than the second power includes SOC > 60%. The third voltage is 37V.

[0094] Please refer to Figure 6 , in some embodiments, after step S031, the control method of the energy storage device 100 includes:

[0095] Step S032: When the current temperature of the battery module 12 is greater than the first operating temperature, control the discharge switch 20 of the battery module 12 to turn on.

[0096] In this way, the temperature of the battery module can reach an appropriate operating temperature before discharging, which is beneficial to ensuring electrical safety and the service life of the energy storage device 100.

[0097] Specifically, in some embodiments, the energy storage device 100 needs to discharge in an environment above -20°C. Therefore, when it is obtained that the energy storage device 100 is in the discharge state, first judge the current temperature of the battery module 12. When the current temperature of the battery module 12 is above -20°C, control the discharge switch 20 to open. At this time, the battery module 12 can supply power to the external load 21, which is beneficial to ensuring electrical safety and the service life of the energy storage device 100.

[0098] In one embodiment, the first operating temperature is -20°C.

[0099] Please refer to Figure 7 , in some embodiments, after step S031, the control method of the energy storage device 100 includes:

[0100] Step S033: When the current temperature of the battery module 12 is greater than the second operating temperature, control the heating module 10 to turn off.

[0101] In this way, the temperature of the battery module can reach an appropriate operating temperature and then control the heating module 10 to turn off, which can save power to supply the load 21.

[0102] Specifically, the first temperature is the lowest temperature requirement for the operation of the energy storage device 100. When the current temperature of the battery module 12 is greater than the second operating temperature, control the heating module 10 to turn off. Since the battery module 12 supplies power and releases heat, its current temperature can be maintained above the first temperature, thus avoiding too low temperature during discharge and having an adverse impact on the battery module 12.

[0103] In one embodiment, the second operating temperature is -15°C.

[0104] Please refer to Figure 8 , in some embodiments, step S03 includes:

[0105] Step S034: When the energy storage device 100 is in a charging state and the current temperature of the battery module 12 is within the third temperature range, control the heating module 10 to operate at the maximum power to heat the battery module 12.

[0106] In this way, the operation of the heating module 10 can be controlled according to the current temperature of the battery module 12 in the charging state, so as to ensure the stable and reliable operation of the energy storage device 100 in the charging state.

[0107] Specifically, the energy storage device 100 needs to be charged at a certain temperature or above. Therefore, when it is obtained that the energy storage device 100 is in a charging state, the current temperature of the battery module 12 is first judged, and when the temperature required for charging is met, charging is carried out, which is beneficial to ensuring the stable and reliable operation of the energy storage device 100 in the charging state.

[0108] Since the battery power is relatively sufficient in the charging state, the heating module 10 can be controlled to heat at the maximum power, so that the temperature of the battery module 12 can be quickly raised to a suitable operating temperature. In one embodiment, the heating power of the heating film 11 includes a first power, a second power, a third power, and a fourth power that increase in sequence. The first power, the second power, the third power, and the fourth power are 300W, 225W, 150W, and 75W respectively. The maximum power is the fourth power of 300W.

[0109] In one embodiment, the third temperature range is less than or equal to 0°C. When a charging signal is received, the current temperature of the battery module 12 is obtained. When the current temperature is greater than 0°C, the charging switch 18 of the battery module 12 can be directly controlled to turn on. When the current temperature is less than or equal to 0°C, the heating module 10 is controlled to operate at the maximum power to heat the battery module 12.

[0110] Please refer to Figure 9 , in some embodiments, after step S034, the control method of the energy storage device 100 includes:

[0111] Step S035: When the current temperature of the battery module 12 is greater than the third operating temperature, control the charging switch 18 of the battery module 12 to turn on.

[0112] In this way, it is beneficial to ensure the stable and reliable operation of the energy storage device 100 in the charging state.

[0113] Specifically, the energy storage device 100 needs to be charged in a temperature environment above the third operating temperature. Therefore, when it is obtained that the energy storage device 100 is in a charging state, the current temperature of the battery module 12 is first judged. When the current temperature of the battery module 12 is greater than the third operating temperature, the charging switch 18 of the battery module 12 is controlled to be turned on, which is beneficial to ensuring the stable and reliable operation of the energy storage device 100 in the charging state.

[0114] In one embodiment, the third operating temperature is 0°C.

[0115] Please refer to Figure 10 , in some embodiments, after step S034, the control method of the energy storage device 100 includes:

[0116] Step S036: When the current temperature of the battery module 12 is greater than the fourth operating temperature, control the heating module 10 to turn off.

[0117] In this way, the operating temperature of the energy storage device 100 can be maintained at a suitable operating temperature.

[0118] Specifically, since the battery inside the battery module will react during charging, causing the temperature of the battery module to rise. At the same time, too high a temperature is also not conducive to the operation of the battery module 12. Therefore, after the heating module 10 works to raise the current temperature of the battery module 12 to a certain level, the heating module 10 is controlled to turn off, so as to keep the battery module 12 at a suitable operating temperature.

[0119] In one embodiment, the fourth operating temperature is 20°C. That is, when the current temperature of the battery module 12 is greater than 20°C, control the heating module 10 to turn off.

[0120] To sum up, the battery module 12 is heated by the heating film 11. The principle is that the resistance can convert electrical energy into heat energy, and the heating power can be adjusted by adjusting the resistance value of the heating film 11 or the input voltage of the heating film 11. In the case of low-temperature discharge, the heating film 11 will start first. After heating the battery module 12 to the specified temperature, the energy storage device 100 starts to discharge. In the case of low-temperature charging, after the heating film 11 heats the battery module 12 to the target temperature by using the external power input, the energy storage device 100 starts to charge.

[0121] Please refer to Figure 11 , a control device 23 of an energy storage device 100 provided by an embodiment of the present invention includes a processor 24 and a memory 26. The memory 26 stores a computer program, and when the computer program is executed by the processor 24, the steps of the control device 23 of the energy storage device 100 in any of the above embodiments are implemented.

[0122] A computer-readable storage medium provided by an embodiment of the present invention stores a computer program thereon. When the computer program is executed by a processor 24, the steps of the control method of the energy storage device 100 in any of the above embodiments are implemented.

[0123] Please refer to Figure 11 , an energy storage device 100 provided by an embodiment of the present invention includes a control device 23 of the energy storage device 100 in the above embodiment.

[0124] Among the above control device 23 of the energy storage device 100, computer-readable storage medium and energy storage device 100, according to the current temperature and current state of the battery module 12, the heating module 10 is controlled to be turned on and off, so that the battery module 12 can be heated, thus ensuring that the energy storage device 100 can work normally under different temperature conditions, and at the same time avoiding restricting the use environment of the energy storage device 100.

[0125] Specifically, the energy storage device 100 includes a portable energy storage device 100.

[0126] In some embodiments, the energy storage device 100 includes a heating module 10 and a battery module 12. The heating module 10 includes a heating film 11, and the heating film 11 is disposed on the battery module 12.

[0127] In this way, the heating film 11 is in direct contact with the battery module 12, which is beneficial to improving the heating efficiency.

[0128] Specifically, the heating module 10 includes, but is not limited to, a heating net, a heating wire, a heating tube or a heating film 11, etc. In one embodiment, the heating module 10 includes a heating film 11, and the heating film 11 includes an insulating layer and a heating wire, and the heating wire is coated between two insulating layers.

[0129] Further, the heating wire can be bent to increase the heating area and heating efficiency.

[0130] In one embodiment, the heating film 11 covers the top and bottom surfaces in the installation direction of the battery module 12, which is beneficial to the uniformity of heating the battery assembly 14 and improving the heating efficiency.

[0131] In other embodiments, the heating film 11 can be disposed on at least one of the left and right or front and back surfaces of the battery module 12.

[0132] In some embodiments, the heating module 10 further includes a buck circuit, and the buck circuit is electrically connected to the battery module 12 and the heating film 11. The buck circuit is used to convert the input voltage of the battery module 12 into the output voltage required by the heating film 11.

[0133] In this way, a stable and reliable working voltage can be provided for the heating film 11.

[0134] Specifically, the heating module 10 includes a Buck step-down circuit, which is used to convert the input voltage of the battery module 12 into the output voltage required by the heating film 11. The Buck step-down circuit controls the on and off periods of the switching device (such as MOSFET) through pulse width modulation, with high power conversion efficiency, and can significantly reduce energy loss and heat generation. In addition, compared with other complex topologies, the Buck step-down circuit has fewer components, smaller volume, and is easy to integrate into portable devices.

[0135] In one embodiment, when the computer program is executed by the processor 24, the steps of the control method of the energy storage device 100 include:

[0136] Step S01: Obtain the current state of the energy storage device 100 and the current temperature of the battery module 12. The current state of the energy storage device 100 includes at least one of the charge and discharge state, remaining power, and current voltage;

[0137] Step S03: According to the current state of the energy storage device 100 and the current temperature of the battery module 12, control the heating module 10 to work at a preset power to heat the battery module 12.

[0138] It should be noted that the above explanations of the embodiments and beneficial effects of the control method of the energy storage device 100 also apply to the control device 23, computer-readable storage medium, and energy storage device 100 of the embodiments of the present invention. To avoid redundancy, no detailed expansion will be made here.

[0139] It can be understood that the computer program includes computer program code. The computer program code can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable storage medium can include: any entity or device that can carry the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), and software distribution medium, etc. The processor can be a central processing unit, or other general-purpose processors, digital signal processors (DSP, Digital Signal Processor), application-specific integrated circuits (ASIC, Application Specific Integrated Circuit), field-programmable gate arrays (FPGA, Field-Programmable Gate Array), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0140] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0141] 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, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A control method for an energy storage device, characterized in that: The energy storage device comprises a heating module and a battery module, the heating module is used to heat the battery module, and the control method of the energy storage device comprises: Acquire the current state of the energy storage device and the current temperature of the battery module, wherein the current state of the energy storage device includes at least one of a charge and discharge state, a remaining power, and a current voltage; According to the current state of the energy storage device and the current temperature of the battery module, the heating module is controlled to operate at a preset power to heat the battery module.

2. The control method of the energy storage device according to claim 1, characterized in that: According to the current state of the energy storage device and the current temperature of the battery module, controlling the heating module to operate at a preset power to heat the battery module comprises: When the energy storage device is in a discharging state, the heating module is controlled to operate at a preset power according to the current temperature of the battery module, the remaining power and the current voltage, so as to heat the battery module.

3. The control method of the energy storage device according to claim 2, characterized in that: The preset power includes a first power, a second power, a third power and a fourth power which increase in sequence, and when the energy storage device is in a discharging state, controlling the heating module to operate at the preset power according to the current temperature of the battery module, the remaining power and the current voltage to heat the battery module includes at least one of the following: When the energy storage device is in a discharging state, the current temperature of the battery module is within a first temperature range, the remaining power is greater than the first power, and the current voltage is greater than the first voltage, controlling the heating module to operate at the fourth power; When the energy storage device is in a discharging state, the current temperature of the battery module is within the first temperature range, the remaining power is greater than the first power, and the current voltage is less than or equal to the first voltage and greater than the second voltage, controlling the heating module to operate at the third power; When the energy storage device is in a discharging state, the current temperature of the battery module is within the first temperature range, the remaining power is greater than the first power, and the current voltage is less than or equal to the second voltage and greater than a third voltage, controlling the heating module to operate at the second power; When the energy storage device is in a discharging state, the current temperature of the battery module is within the first temperature range, the remaining power is greater than the first power, and the current voltage is less than the third voltage, the heating module is controlled to operate at the first power.

4. The control method of the energy storage device according to claim 2, characterized in that: When the energy storage device is in a discharging state, controlling the heating module to operate at a preset power according to the current temperature of the battery module, the remaining power and the current voltage to heat the battery module includes: When the energy storage device is in a discharging state, the current temperature of the battery module is within a second temperature range, the remaining power is greater than the second power, and the current voltage is greater than a third voltage, controlling the heating module to operate at a second power; When the energy storage device is in a discharging state, the current temperature of the battery module is within the second temperature range, the remaining power is greater than the second power, and the current voltage is less than or equal to the third voltage, the heating module is controlled to operate at the first power.

5. The control method of the energy storage device according to claim 2, characterized in that: After the step of controlling the heating module to operate at a preset power to heat the battery module according to the current temperature of the battery module, the remaining power and the current voltage when the energy storage device is in a discharging state, the control method of the energy storage device includes: When the current temperature of the battery module is greater than the first operating temperature, controlling the discharge switch of the battery module to turn on, and / or; When the current temperature of the battery module is greater than the second operating temperature, the heating module is controlled to be turned off.

6. The control method of the energy storage device according to claim 1, characterized in that: According to the current state of the energy storage device and the current temperature of the battery module, controlling the heating module to operate at a preset power to heat the battery module comprises: When the energy storage device is in a charging state and the current temperature of the battery module is within a third temperature range, the heating module is controlled to operate at maximum power to heat the battery module.

7. The control method of the energy storage device according to claim 6, characterized in that: After the step of controlling the heating module to operate at maximum power to heat the battery module when the energy storage device is in a charging state and the current temperature of the battery module is within a third temperature range, the control method of the energy storage device includes: When the current temperature of the battery module is greater than the third operating temperature, controlling the charging switch of the battery module to turn on, and / or; When the current temperature of the battery module is greater than the fourth operating temperature, the heating module is controlled to be turned off.

8. A control device for an energy storage device, characterized in that: include: processor; and, A memory storing a computer program, wherein the computer program, when executed by the processor, implements the steps of the method for controlling the energy storage device according to any one of claims 1 to 7.

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

10. An energy storage device, characterized in that: A control device comprising the energy storage device as claimed in claim 8.

11. The energy storage device according to claim 10, characterized in that: The energy storage device comprises a heating module and a battery module. The heating module comprises a heating film, and the heating film is arranged on the battery module.

12. The energy storage device according to claim 11, characterized in that: The heating module further comprises a step-down circuit, which is electrically connected to the battery module and the heating film, and is used for converting the input voltage of the battery module into the output voltage required by the heating film.

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