Control method, control device, inverter and storage medium

Abstract

The present invention discloses a control method, a control device, an inverter, and a storage medium. The control method includes: obtaining the real-time temperature of the components of the inverter; when the real-time temperature is within a preset temperature range, calculating and determining the real-time temperature change rate of the components based on the real-time temperature of the components; determining the temperature change rate region in which the real-time temperature change rate is located as the current temperature change rate region; and controlling the fan to operate at different speed change rates based on different current temperature change rate regions. In this way, the fan can be controlled to operate at different speed change rates based on the different temperature change rate regions in which the real-time temperature change rate of the components is located, thereby enabling the fan speed to be adjusted dynamically and timely, so that the fan can meet the heat dissipation requirements of the inverter while also saving energy consumption and reducing noise.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation of electrical equipment, and in particular to a control method, a control device, an inverter and a storage medium. Background Art

[0002] In related technologies, energy storage devices include battery packs and inverters. The battery packs have a low temperature rise during operation and can be cooled by natural heat dissipation. However, the inverter has a high heat flux density and is typically cooled by air cooling. Generally, to ensure effective heat dissipation from the inverter, the fan speed is typically adjusted to a higher speed. However, a higher speed can waste energy and generate a lot of noise. Summary of the Invention

[0003] The present invention provides a control method, a control device, an inverter and a storage medium.

[0004] An embodiment of the present application provides a control method for controlling a wind turbine of an inverter, the control method comprising:

[0005] Obtaining real-time temperatures of components of the inverter;

[0006] When the real-time temperature is within a preset temperature range, determining the real-time temperature change rate of the component based on the real-time temperature of the component;

[0007] Determining the temperature change rate region in which the real-time temperature change rate is located as the current temperature change rate region;

[0008] Based on different current temperature change rate regions, the fan is controlled to operate at different speeds.

[0009] In the control method of the embodiment of the present application, the fan can be controlled to operate at different speeds according to the different temperature change rate zones of the real-time temperature change rate of the components, so that the fan speed can be adjusted dynamically in time, so that the fan can meet the heat dissipation requirements of the inverter while also saving energy consumption and reducing noise.

[0010] In some embodiments, calculating and determining the real-time temperature change rate of the component based on the real-time temperature of the component includes:

[0011] The highest temperature of the real-time temperatures of the multiple components obtained at two moments in time is used as the first real-time temperature and the second real-time temperature respectively;

[0012] taking the difference between the second real-time temperature and the first real-time temperature as the real-time temperature difference;

[0013] The ratio of the difference in the real-time temperature to the time interval between the two moments is taken as the real-time temperature change rate.

[0014] In certain embodiments, the temperature gradient region is determined by:

[0015] Obtaining a first preset ambient temperature, a second preset ambient temperature, a first preset device temperature, a charging duration, and a discharging duration, wherein the second preset ambient temperature is greater than the first preset ambient temperature, the first preset ambient temperature is the lowest ambient temperature at which the inverter can operate, the second preset ambient temperature is the highest ambient temperature at which the inverter can operate, and the first preset device temperature is a protection temperature of the inverter;

[0016] Calculating and determining boundary values ​​of a plurality of temperature change rate regions based on a first preset ambient temperature, a second preset ambient temperature, a first preset device temperature, a charging time, and a discharging time;

[0017] A plurality of temperature change rate regions are formed according to the boundary value.

[0018] In certain embodiments, forming a plurality of temperature change rate regions according to the boundary value includes:

[0019] According to the boundary value, a temperature smoothing area, a temperature changing area and a temperature rapidly changing area are formed, wherein the temperature changing rates in the temperature smoothing area, the temperature changing area and the temperature rapidly changing area are successively larger;

[0020] The controlling the fan to operate at different speeds based on different current temperature change rate regions includes:

[0021] When the temperature change rate region in which the real-time temperature change rate is located is the temperature smoothing region, controlling the speed of the fan to remain unchanged; and / or,

[0022] When the temperature change rate zone where the real-time temperature change rate is located is the temperature change zone or the rapid temperature change zone, the speed of the fan is increased or decreased, wherein, when the temperature change rate zone where the real-time temperature change rate is located is the temperature change zone, the speed change rate of the fan is a first change rate, and when the temperature change rate zone where the real-time temperature change rate is located is the rapid temperature change zone, the speed change rate of the fan is a second change rate, and the second change rate is greater than the first change rate.

[0023] In certain embodiments, the cutoff value is determined by calculation as follows:

[0024] δ=(Tm1-Ta2) / t1;

[0025] σ=(Tm1-Ta1) / t2;

[0026] Wherein, δ is a first dividing value, Tm1 is the first preset device temperature, Ta2 is the second preset ambient temperature, and t1 is the maximum of the charging time and the discharging time;

[0027] σ is the second dividing value, Ta1 is the first preset ambient temperature, t2 is the minimum of the charging time and the discharging time,

[0028] The temperature smoothing region is (0, δ] and / or [-δ, 0), the temperature changing region is (δ, σ] and / or [-σ, -δ), and the temperature rapidly changing region is (σ, +∞) or (-∞, -σ).

[0029] In some embodiments, the control method further comprises:

[0030] Obtaining input and output power of the inverter;

[0031] determining an initial speed of the fan based on the input and output power;

[0032] The fan is controlled to operate at the initial speed.

[0033] In some embodiments, the control method further comprises:

[0034] When the real-time temperature of the component is greater than or equal to a first preset component temperature, controlling the inverter to be in a shutdown state; and / or,

[0035] When the real-time temperature of the component is greater than or equal to the second preset component temperature and less than the first preset component temperature, controlling the fan to operate at a maximum speed; and / or,

[0036] When the real-time temperature of the component is less than or equal to a third preset component temperature, controlling the fan to be in a shutdown state; and / or,

[0037] When the real-time temperature of the component is greater than the third preset component temperature and less than the second preset component temperature, the real-time temperature change rate of the component is determined by performing the calculation based on the real-time temperature of the component.

[0038] A control device for controlling a fan of an inverter, the control device comprising:

[0039] An acquisition module, configured to acquire the real-time temperature of components of the inverter;

[0040] a calculation module, configured to determine a real-time temperature change rate of the component based on the real-time temperature of the component when the real-time temperature is within a preset temperature range;

[0041] a determination module, configured to determine a temperature change rate region in which the real-time temperature change rate is located as a current temperature change rate region;

[0042] The control module is used to control the fan to operate at different speeds based on different current temperature change rate regions.

[0043] An inverter includes a memory and a processor connected to the memory, wherein the memory is used to store a computer program, and the processor is used to execute the computer program to implement the control method described in any one of the above embodiments.

[0044] A computer-readable storage medium, when the computer-executable instructions are executed by one or more processors, causes the processors to execute the control method described in any one of the above embodiments.

[0045] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments with reference to the following drawings, in which:

[0047] Figure 1 is an exploded schematic diagram of an energy storage device according to an embodiment of the present invention;

[0048] Figure 2 is a three-dimensional schematic diagram of an inverter according to an embodiment of the present invention;

[0049] Figure 3 is a flow chart of a control method according to an embodiment of the present invention;

[0050] Figure 4 is a schematic diagram of a module of a control device according to an embodiment of the present invention;

[0051] Figure 5 1 is a schematic diagram of a module of an inverter according to an embodiment of the present invention;

[0052] Figure 6 is a flow chart of a control method according to an embodiment of the present invention;

[0053] Figure 7 is a flow chart of a control method according to an embodiment of the present invention;

[0054] Figure 8 is a flow chart of a control method according to an embodiment of the present invention;

[0055] Figure 9is a schematic diagram of the distribution of temperature change rate regions according to an embodiment of the present invention;

[0056] Figure 10 is a flow chart of a control method according to an embodiment of the present invention;

[0057] Figure 11 Schematic diagram of the relationship between the power of the inverter and the rotational speed of the wind turbine according to an embodiment of the present invention.

[0058] Description of reference numerals:

[0059] Energy storage device 1000, battery pack 200, inverter 100, circuit board 10, components 20, fan 30, housing 1100, memory 50, processor 60; control device 300, acquisition module 310, calculation module 320, determination module 330, control module 340. DETAILED DESCRIPTION

[0060] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention.

[0061] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating orientations or positional relationships, are based on the orientations 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 therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0062] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, or mutual communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0063] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0064] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0065] See also Figure 1 , Figure 1 An exploded schematic diagram of an energy storage device 1000 according to an embodiment of the present application is shown. Energy storage device 1000 includes a battery pack 200 and an inverter 100, which is electrically connected to battery pack 200. Inverter 100 is used for AC-DC conversion, converting mains electricity into direct current for battery charging and converting battery current into alternating current for external power supply.

[0066] See also Figure 2 The inverter 100 may include a circuit board 10, components 20, and a fan 30. The components 20 are arranged on the circuit board 10, and the fan 30 is used to form an airflow to dissipate heat from the components 20. The components 20 include at least one of a heat sink, a MOS tube, a capacitor, an inductor, a relay, and a transformer.

[0067] In some embodiments, the energy storage device 1000 may further include a housing 1100, in which the battery pack 200 and the inverter 100 are mounted. The housing 1100 may reduce external interference with the battery pack 200 and the inverter 100, thereby improving the safety and service life of the energy storage device 1000.

[0068] See also Figure 3 The control method of the embodiment of the present application is used to control the wind turbine 30 of the inverter 100, and the control method includes:

[0069] S10, obtaining the real-time temperature T of the component 20 of the inverter 100;

[0070] S20, when the real-time temperature T of the component 20 is within a preset temperature range, calculating and determining the real-time temperature change rate TR of the component 20 based on the real-time temperature T of the component 20;

[0071] S30, determining the temperature change rate region in which the real-time temperature change rate TR of the component 20 is located as the current temperature change rate region;

[0072] S40 , based on different current temperature change rate regions, controlling the fan 30 to operate at different speed change rates.

[0073] See also Figure 4 The embodiment of the present application provides a control device 300, which is used to control the fan 30 of the inverter 100 and includes an acquisition module 310, a calculation module 320, a determination module 330 and a control module 340, wherein the acquisition module 310 is used to obtain the real-time temperature T of the component 20 of the inverter 100; the calculation module 320 is used to calculate and determine the real-time temperature change rate TR of the component 20 based on the real-time temperature T of the component 20 when the real-time temperature T is within a preset temperature range; the determination module 330 is used to determine the temperature change rate area in which the real-time temperature change rate TR is located as the current temperature change rate area; the control module 340 is used to control the fan 30 to operate at different speed change rates based on different current temperature change rate areas.

[0074] See also Figure 5The inverter 100 of the embodiment of the present application includes a memory 50 and a processor 60 connected to the memory 50. The memory 50 is used to store a computer program, and the processor 60 is used to execute the computer program to implement the above-mentioned control method. In other words, steps S10-S40 are executed by the processor 60. Exemplarily, the processor 60 is used to obtain the real-time temperature T of the component 20 of the inverter 100; and when the real-time temperature T is within a preset temperature range, the real-time temperature change rate TR of the component 20 is calculated based on the real-time temperature T of the component 20; and is used to determine the temperature change rate area in which the real-time temperature change rate TR is located as the current temperature change rate area; and is used to control the fan 30 to operate at different speed change rates based on different current temperature change rate areas.

[0075] In the control method, control device 300 and inverter 100 of the embodiment of the present application, the fan 30 can be controlled to operate at different speed change rates according to the different temperature change rate regions in which the real-time temperature change rate TR of the component 20 is located, so that the speed of the fan 30 can be adjusted dynamically in time, so that the fan 30 can meet the heat dissipation requirements of the inverter 100 while also saving energy consumption and reducing noise.

[0076] Specifically, in step S10, as described above, the component 20 can be at least one of a heat sink, a MOS transistor, a capacitor, an inductor, a relay, and a transformer. When there is only one component 20, the real-time temperature T of the component 20 can be one. When there are multiple components 20, the real-time temperature T of the component 20 can be multiple. The real-time temperature T of the component 20 can be detected by a device such as a thermal resistor or a temperature sensor disposed on the component 20. The real-time temperature T of the component 20 can be collected at predetermined intervals, so that the real-time temperature T of the component 20 can be updated in real time.

[0077] In step S20, the preset temperature range is one of the main bases for controlling the fan 30. For example, if the real-time temperature T of the component 20 is too high, the fan 30 needs to rotate at the maximum speed to quickly reduce the temperature of the component 20. At this time, the speed of the fan 30 does not need to be further adjusted. If the real-time temperature T of the component 20 is too low, the fan 30 does not need to be started. At this time, the speed of the fan 30 does not need to be adjusted. Therefore, when the real-time temperature T of the component 20 is within the preset temperature range, the speed of the fan 30 can be adjusted between zero speed and maximum speed, so that the fan 30 rotates according to different heat dissipation requirements to meet heat dissipation while reducing noise. The speed regulation of the heat dissipation fan 30 can generally be achieved through PWM speed regulation, voltage speed regulation, resistance speed regulation, etc., so as to achieve the purpose of adjusting the speed.

[0078] The real-time temperature change rate TR of component 20 is the ratio of the real-time temperature T of component 20 at two consecutive moments to the duration of the two moments. It can be understood that since the real-time temperature T of component 20 changes in real time, the real-time temperature change rate TR of component 20 also changes in real time. Therefore, the speed of fan 30 can be dynamically adjusted based on the real-time temperature change rate TR of component 20.

[0079] The larger the absolute value of the real-time temperature change rate TR of the component 20 is, the greater the change in the real-time temperature T of the component 20 is, and the faster the rotation speed of the fan 30 needs to be adjusted.

[0080] In steps S30 and S40, different temperature change rate zones indicate different temperature change rates. Dividing the temperature change rate into different zones facilitates setting different control strategies for fan 30, dynamically controlling the speed of fan 30 to meet the heat dissipation requirements of component 20, while also saving energy and reducing noise. For example, if the temperature change rate zone of component 20 indicates a rapid temperature change rate, the speed of fan 30 can be controlled to adjust by a larger factor to quickly increase or decrease the speed of fan 30.

[0081] See also Figure 6 In some embodiments, the real-time temperature change rate TR of the component 20 is calculated based on the real-time temperature T of the component 20 (S20), including:

[0082] S21, taking the highest temperature among the real-time temperatures T of the plurality of components 20 obtained at two moments in time as the first real-time temperature and the second real-time temperature respectively;

[0083] S22, taking the difference between the second real-time temperature and the first real-time temperature as the difference in real-time temperature T;

[0084] S23: The ratio of the difference between the real-time temperature T and the time interval between the two moments is taken as the real-time temperature change rate TR.

[0085] In some embodiments, the calculation module 320 is used to use the highest temperature among the real-time temperatures T of multiple components 20 obtained at two previous and subsequent moments as the first real-time temperature and the second real-time temperature, respectively; and to use the difference between the second real-time temperature and the first real-time temperature as the difference in real-time temperature T; and to use the ratio of the difference in real-time temperature T to the time interval between the two previous and subsequent moments as the real-time temperature change rate TR.

[0086] In some embodiments, the processor 60 is used to use the highest temperature among the real-time temperatures T of multiple components 20 obtained at two previous and subsequent moments as the first real-time temperature and the second real-time temperature, respectively; and to use the difference between the second real-time temperature and the first real-time temperature as the difference in real-time temperature T; and to use the ratio of the difference in real-time temperature T to the time interval between the two previous and subsequent moments as the real-time temperature change rate TR.

[0087] Specifically, in step S21, multiple components 20 in the inverter 100 work in coordination, ensuring that each component 20 functions properly for the inverter 100 to function properly. Among the multiple components 20, the component 20 with the highest temperature requires faster heat dissipation. Therefore, the highest temperature among the real-time temperatures T of the multiple components 20 is used as a parameter for calculating the real-time temperature change rate TR. This allows for more reasonable speed control of the fan 30, helping to meet the heat dissipation requirements of the inverter 100.

[0088] The first real-time temperature is the highest of the real-time temperatures T of the components 20 acquired at the previous moment. The second real-time temperature is the highest of the real-time temperatures T of the components 20 acquired at the next moment. For example, if there are four components 20 and four real-time temperatures T are acquired at the previous moment, the highest of these four real-time temperatures T is the first real-time temperature. Similarly, at the next moment, the highest of the four real-time temperatures T is the second real-time temperature.

[0089] In steps S22 and S23, the difference between the first real-time temperature and the second real-time temperature is first calculated, and then the ratio of the difference between the two real-time temperatures T and the time interval between the two moments is calculated to obtain the real-time temperature change rate TR of the component 20. In this way, the speed of the fan 30 can be controlled according to the real-time temperature change rate TR of the component 20 to meet the heat dissipation requirements of the component 20.

[0090] In one example, the time interval between the two moments is 10 seconds (s), and the difference between the second real-time temperature and the first real-time temperature is 5° C., then the real-time temperature change rate TR of the component 20 is 0.5° C. / s.

[0091] See also Figure 7 In certain embodiments, the temperature gradient region is determined by:

[0092] S31, obtaining a first preset ambient temperature Ta1, a second preset ambient temperature Ta2, a first preset device temperature Tm1, a charging time, and a discharging time, where the second preset ambient temperature Ta2 is greater than the first preset ambient temperature Ta1;

[0093] S32, calculating and determining boundary values ​​of a plurality of temperature change rate regions based on the first preset ambient temperature Ta1, the second preset ambient temperature Ta2, the first preset device temperature Tm1, the charging time, and the discharging time;

[0094] S33, forming a plurality of temperature change rate regions according to the boundary value.

[0095] In some embodiments, the determination module 330 is used to obtain a first preset ambient temperature Ta1, a second preset ambient temperature Ta2, a first preset device temperature Tm1, a charging time, and a discharging time, where the second preset ambient temperature Ta2 is greater than the first preset ambient temperature Ta1; and is used to calculate and determine the boundary values ​​of multiple temperature change rate regions based on the first preset ambient temperature Ta1, the second preset ambient temperature Ta2, the first preset device temperature Tm1, the charging time, and the discharging time; and is used to form multiple temperature change rate regions according to the boundary values.

[0096] In some embodiments, the processor 60 is used to obtain a first preset ambient temperature Ta1, a second preset ambient temperature Ta2, a first preset device temperature Tm1, a charging time, and a discharging time, wherein the second preset ambient temperature Ta2 is greater than the first preset ambient temperature Ta1; and is used to calculate and determine the boundary values ​​of multiple temperature change rate regions based on the first preset ambient temperature Ta1, the second preset ambient temperature Ta2, the first preset device temperature Tm1, the charging time, and the discharging time; and is used to form multiple temperature change rate regions according to the boundary values.

[0097] Specifically, in step S31, the first preset ambient temperature Ta1 may be the minimum ambient temperature at which the inverter 100 can operate, and the second preset ambient temperature Ta2 is the minimum ambient temperature at which the inverter 100 can operate. The first preset device temperature Tm1 is the protection temperature of the inverter 100. The first preset device temperature Tm1 may be the maximum temperature at which a single component 20 can operate normally. When the component 20 includes multiple types, the first preset device temperature Tm1 may be the minimum of multiple maximum temperatures at which the multiple components 20 can operate normally. The charging duration is the time required for the battery pack 200 of the energy storage device 1000 to charge from 0% to 100%, and the discharging duration is the time required for the battery pack 200 of the energy storage device 1000 to discharge from 100% to 0%.

[0098] In steps S32 and S33, it is understood that if the ambient temperature is too low, the performance of the component 20 may be affected, causing the inverter 100 to malfunction. If the ambient temperature is too high, the component 20 cannot dissipate heat, which may also cause the inverter 100 to malfunction. If the temperature of the component 20 itself is too high, the component 20 may not function.

[0099] The inverter 100 generally operates along with the charging or discharging process of the battery pack 200. That is, during the charging or discharging process of the battery pack 200, the components 20 in the inverter 100 will generate heat, causing the temperature of the components 20 themselves to gradually increase. Therefore, it is necessary to dissipate heat from the inverter 100 during the charging or discharging process of the battery pack 200.

[0100] Therefore, the first preset ambient temperature Ta1, the second preset ambient temperature Ta2, the first preset device temperature Tm1, the charging time and the discharging time are used as parameters for calculating the boundary values ​​of multiple temperature change rate zones. In this way, the speed of the fan 30 is controlled according to the multiple temperature change rate zones determined according to the boundary values, which can better meet the heat dissipation and noise reduction requirements of the components 20.

[0101] See also Figure 8 In some embodiments, a plurality of temperature change rate regions are formed according to the boundary value (S33), including:

[0102] According to the boundary value, a temperature smoothing area, a temperature changing area and a temperature rapid changing area are formed, and the temperature change rates in the temperature smoothing area, the temperature changing area and the temperature rapid changing area become larger in sequence;

[0103] Based on different current temperature change rate regions, controlling the fan 30 to operate at different speed change rates (S40) includes:

[0104] S41, when the temperature change rate region where the real-time temperature change rate TR is located is a temperature smoothing region, controlling the speed of the fan 30 to remain unchanged; and / or,

[0105] S42, when the temperature change rate area where the real-time temperature change rate TR is located is the temperature change area or the temperature rapid change area, increase or decrease the speed of the fan 30, wherein, when the temperature change rate area where the real-time temperature change rate TR is located is the temperature change area, the speed change rate of the fan 30 is the first change rate, and when the temperature change rate area where the real-time temperature change rate TR is located is the temperature rapid change area, the speed change rate of the fan 30 is the second change rate, and the second change rate is greater than the first change rate.

[0106] In some embodiments, the determination module 330 is used to form a temperature smoothing zone, a temperature changing zone, and a temperature rapidly changing zone according to the dividing value, and the temperature change rate in the temperature smoothing zone, the temperature changing zone, and the temperature rapidly changing zone increases successively; the control module 340 is used to increase or decrease the speed of the fan 30 when the temperature change rate area where the real-time temperature change rate TR is located is a temperature change zone or a temperature rapidly changing zone.

[0107] In some embodiments, the processor 60 is used to form a temperature smoothing zone, a temperature changing zone, and a temperature rapid changing zone according to the dividing value, and the temperature change rate in the temperature smoothing zone, the temperature changing zone, and the temperature rapid changing zone increases successively; and is used to increase or decrease the speed of the fan 30 when the temperature change rate area where the real-time temperature change rate TR is located is a temperature change zone or a temperature rapid changing zone.

[0108] Specifically, the temperature smoothing zone is an area where the temperature change rate is minimal. For example, if the maximum temperature of component 20 does not exceed the first preset device temperature Tm1 immediately after the battery pack 200 completes a charge or discharge cycle, the temperature of component 20 is considered to have transitioned smoothly, and the normal speed of fan 30 can meet the heat dissipation requirements of component 20, requiring no adjustment. In other words, based on the temperature change rate of component 20, if it is determined that component 20 does not exceed the first preset device temperature Tm1 immediately after the battery pack 200 completes a charge or discharge cycle, the temperature change rate of component 20 is considered to be in the temperature smoothing zone.

[0109] Temperature change zones and rapid temperature change zones are areas with a high rate of temperature change. For example, during a single charge or discharge cycle of the battery pack 200, if the maximum temperature of the component 20 exceeds the first preset component temperature Tm1, it is considered that the temperature change rate of the component 20 is rapid, and the normal speed of the fan 30 is insufficient to meet the cooling requirements of the component 20, or is excessive, requiring adjustment. To meet the cooling requirements of the component 20, the speed of the fan 30 needs to be increased or decreased. The greater the temperature change rate, the faster the speed adjustment of the fan 30, and the greater the speed change rate of the fan 30.

[0110] In other words, based on the temperature change rate of the component 20 , if it is determined that the component 20 exceeds the first preset device temperature Tm1 during a charge or discharge process of the battery pack 200 , it is considered that the temperature change rate of the component 20 is in the temperature change zone or the rapid temperature change zone.

[0111] For example, during a charge or discharge process of the battery pack 200, after the maximum temperature of the component 20 exceeds the first preset component temperature Tm1, the fan 30 can use the highest speed to dissipate heat from the component 20. As the temperature of the component 20 drops, the fan 30 may have excess heat dissipation performance and a high noise level. At this time, the speed of the fan 30 needs to be reduced.

[0112] Therefore, the rotation speed of the fan 30 is adjusted according to the temperature smoothing area, the temperature changing area and the temperature rapidly changing area, so that the fan 30 can meet the heat dissipation requirements of the inverter 100 and reduce the noise generated by the fan 30.

[0113] It should be noted that the speed change rate of the fan 30 refers to the absolute value of the ratio of the difference between the speeds of the fan 30 at two moments before and after to the time interval.

[0114] In certain embodiments, the cutoff value is determined by calculation as follows:

[0115] δ=(Tm1-Ta2) / t 1 (1);

[0116] σ=(Tm1-Ta1) / t2 (2);

[0117] Wherein, δ is the first dividing value, Tm1 is the first preset device temperature, Ta2 is the second preset ambient temperature, and t1 is the maximum of the charging time and the discharging time;

[0118] σ is the second dividing value, Ta1 is the first preset ambient temperature, t2 is the minimum of the charging time and the discharging time,

[0119] The temperature smoothing region is (0, δ] and / or [-δ, 0), the temperature changing region is (δ, σ] and / or [-σ, -δ), and the temperature rapidly changing region is (σ, +∞) or (-∞, -σ).

[0120] Specifically, as described above, the first preset device temperature Tm1 can be the maximum temperature at which a single component 20 can operate normally. Generally, the first preset device temperature Tm1 is greater than the second preset ambient temperature Ta2. As described above, based on the temperature change rate of the component 20, if it is determined that the component 20 does not exceed the first preset device temperature Tm1 immediately after the battery pack 200 completes a single charge or discharge, the temperature change rate of the component 20 is considered to be in the temperature smoothing zone. If the maximum temperature of the component 20 exceeds the first preset device temperature Tm1 during a single charge or discharge of the battery pack 200, the component 20 is considered to have a rapid temperature change rate.

[0121] Therefore, using the above formula (1), a value with a smaller temperature change rate can be calculated, and using formula (2), a value with a larger temperature change rate can be calculated. The first dividing value δ and the second dividing value σ obtained by calculation can be used to divide the area of ​​the temperature change rate, and can more accurately reflect the temperature change of the component 20, so as to accurately control the operation of the fan 30.

[0122] If the temperature change rate is in the range of (0, δ], it indicates that even at the highest ambient temperature and the longest charge and discharge time, the inverter 100 cannot reach the protection temperature of the inverter 100. This means that at the current fan speed, the inverter 100 will not enter protection mode during the entire charge and discharge process of the inverter 100, and the fan 30 does not need to adjust its speed.

[0123] If the temperature change rate is in (σ, +∞), it indicates that even if the inverter 100 is at the lowest ambient temperature, the inverter 100 will reach the protection temperature of the inverter 100 under the shortest charge and discharge time. This means that at the current fan speed, the inverter 100 is very likely to enter the protection state, and the fan 30 needs to adjust the speed as soon as possible.

[0124] like Figure 9 As shown, the temperature change rate area can be divided into a temperature smooth rising area, a temperature change rising area, a temperature rapid changing rising area, a temperature smooth falling area, a temperature change falling area and a temperature rapid changing falling area.

[0125] In one example, due to mechanical factors such as the internal motor, the fan 30 generally has an accuracy of η% in adjusting its speed, where η is generally between 2 and 10. When the temperature change rate of the component 20 is within the temperature variation zone, the speed of the fan 30 can be increased or decreased by η% until the speed of the fan 30 increases to 100% or decreases to 0. When the temperature change rate of the component 20 is within the rapid temperature change zone, the speed of the fan 30 can be increased or decreased by (σ / δ)*η% until the speed of the fan 30 increases to 100% or decreases to 0.

[0126] When the temperature change rate of the component 20 is in the rapid temperature change zone, the speed of the fan 30 is adjusted by σ / δ times the speed accuracy of the fan 30, so that the speed of the fan 30 is closely related to parameters such as the first preset device temperature Tm1, which can better meet the heat dissipation requirements of the component 20 and the noise reduction effect of the fan 30.

[0127] See also Figure 10 In some embodiments, the control method further comprises:

[0128] S01, obtaining the input and output power of the inverter 100;

[0129] S02, determining an initial rotation speed of the fan 30 based on the input and output power;

[0130] S03, controlling the fan 30 to operate at an initial speed.

[0131] In some embodiments, the acquisition module 310 is used to obtain the input and output power of the inverter 100; the determination module 330 is used to determine the initial speed of the wind turbine 30 based on the input and output power; and the control module 340 is used to control the wind turbine 30 to operate at the initial speed.

[0132] In some embodiments, the processor 60 is configured to obtain input and output power of the inverter 100 ; determine an initial speed of the wind turbine 30 based on the input and output power; and control the wind turbine 30 to operate at the initial speed.

[0133] Please combine Figure 11 Generally, when the inverter 100 is initially started, the fan 30 is typically activated based on the input and output power of the inverter 100 to meet the heat dissipation requirements of the inverter 100. After the fan 30 is activated, the operation of the fan 30 can be further controlled based on parameters such as the temperature of the component 20. The input and output power of the inverter 100 includes input power and output power. The initial speed of the fan 30 is generally linearly related to the input and output power of the inverter 100. Therefore, controlling the initial speed of the fan 30 based on the input and output power of the inverter 100 can meet the heat dissipation requirements of the inverter 100 during initial operation.

[0134] In some embodiments, the control method further comprises:

[0135] When the real-time temperature T of the component 20 is greater than or equal to the first preset component temperature Tm1 (T≥Tm1), the inverter 100 is controlled to be in a shutdown state; and / or,

[0136] When the real-time temperature T of the component 20 is greater than or equal to the second preset component temperature Tm2 and less than the first preset component temperature Tm1, the fan 30 is controlled to run at the maximum speed (Tm2≤T<Tm1); and / or,

[0137] When the real-time temperature T of the component 20 is less than or equal to the third preset component temperature Tm3 (T≤Tm3), the fan 30 is controlled to be in a shutdown state; and / or,

[0138] When the real-time temperature T of the component 20 is greater than the third preset device temperature Tm3 and less than the second preset device temperature Tm2 ((Tm3<T<Tm2)), the real-time temperature change rate TR of the component 20 is determined based on the real-time temperature T of the component 20 .

[0139] Specifically, the first preset device temperature Tm1, the second preset device temperature Tm2, ​​and the third preset device temperature Tm3 decrease in order. As mentioned above, the first preset device temperature Tm1 can be the maximum temperature at which a single component 20 can operate normally. The third preset device temperature Tm3 can be the temperature at which a single component 20 can operate normally without external heat dissipation.

[0140] In this way, when the real-time temperature T of the component 20 is greater than or equal to the first preset component temperature Tm1, it means that the temperature of the component 20 is too high and the risk of failure is relatively high. At this time, controlling the inverter 100 to be in a shutdown state can stop all components 20 of the inverter 100 that require heat dissipation from working, thereby reducing the risk of failure of the inverter 100 and protecting the inverter 100.

[0141] When the real-time temperature T of the component 20 is greater than or equal to the second preset component temperature Tm2 and less than the first preset component temperature Tm1, it indicates that the temperature of the component 20 is relatively high and has a greater risk of failure but can still work normally. At this time, the fan 30 is controlled to run at the maximum speed, so that the component 20 can be cooled, so that the temperature of the component 20 drops rapidly and works normally.

[0142] When the real-time temperature T of the component 20 is less than or equal to the third preset component temperature Tm3, it indicates that the temperature of the component 20 is low and the risk of failure is low. At this time, the fan 30 is controlled to be in a shutdown state, and the component 20 can still work normally by natural heat dissipation, thereby reducing the noise generated by the fan 30.

[0143] When the real-time temperature T of the component 20 is greater than the third preset device temperature Tm3 and less than the second preset device temperature Tm2, ​​the fan 30 needs to be adjusted according to the real-time temperature T of the component 20. At this time, the real-time temperature change rate TR of the component 20 is calculated and determined. In this way, the rotation speed of the fan 30 can be controlled according to the area where the real-time temperature T of the component 20 changes, so as to meet the heat dissipation requirements of the component 20 and reduce the noise generated by the fan 30.

[0144] An embodiment of the present application provides a computer-readable storage medium, which, when computer-executable instructions are executed by one or more processors, enables the processors to execute the control method of any of the above embodiments.

[0145] Specifically, in one embodiment, the processor may be a central processing unit (CPU). The processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or a combination of the above chips.

[0146] Computer programs can be stored in a memory. Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer executable programs, and modules, such as the program instructions / modules corresponding to the methods in the above-described method embodiments. The processor executes the non-transitory software programs, instructions, and modules stored in the memory to perform various processor functions and data processing, thereby implementing the control methods in the above-described method embodiments.

[0147] The storage medium may include, but is not limited to, various media that can store computer programs, such as a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk, or an optical disk.

[0148] Throughout this specification, reference to terms such as "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative descriptions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0149] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A control method for controlling a fan of an inverter, characterized in that: The control method includes: Obtaining real-time temperatures of components of the inverter; When the real-time temperature is within a preset temperature range, determining the real-time temperature change rate of the component based on the real-time temperature of the component; Determining the temperature change rate region in which the real-time temperature change rate is located as the current temperature change rate region; Based on different current temperature change rate regions, controlling the fan to operate at different speed change rates; The temperature change rate region is determined by the following steps: Obtaining a first preset ambient temperature, a second preset ambient temperature, a first preset device temperature, a charging duration, and a discharging duration, wherein the second preset ambient temperature is greater than the first preset ambient temperature, the first preset ambient temperature is the lowest ambient temperature at which the inverter can operate, the second preset ambient temperature is the highest ambient temperature at which the inverter can operate, and the first preset device temperature is a protection temperature of the inverter; Calculating and determining boundary values ​​of a plurality of temperature change rate regions based on a first preset ambient temperature, a second preset ambient temperature, a first preset device temperature, a charging time, and a discharging time; A plurality of temperature change rate regions are formed according to the boundary value.

2. The control method according to claim 1, characterized in that: The calculating and determining the real-time temperature change rate of the component based on the real-time temperature of the component includes: The highest temperature of the real-time temperatures of the multiple components obtained at two moments in time is used as the first real-time temperature and the second real-time temperature respectively; taking the difference between the second real-time temperature and the first real-time temperature as the real-time temperature difference; The ratio of the difference in the real-time temperature to the time interval between the two moments is taken as the real-time temperature change rate.

3. The control method according to claim 1, characterized in that: The forming of a plurality of temperature change rate regions according to the boundary value includes: According to the boundary value, a temperature smoothing area, a temperature changing area and a temperature rapidly changing area are formed, wherein the temperature changing rates in the temperature smoothing area, the temperature changing area and the temperature rapidly changing area are successively larger; The controlling the fan to operate at different speed change rates based on different current temperature change rate regions includes: When the temperature change rate region in which the real-time temperature change rate is located is the temperature smoothing region, controlling the speed of the fan to remain unchanged; and / or, When the temperature change rate zone where the real-time temperature change rate is located is the temperature change zone or the rapid temperature change zone, the speed of the fan is increased or decreased, wherein, when the temperature change rate zone where the real-time temperature change rate is located is the temperature change zone, the speed change rate of the fan is a first change rate, and when the temperature change rate zone where the real-time temperature change rate is located is the rapid temperature change zone, the speed change rate of the fan is a second change rate, and the second change rate is greater than the first change rate.

4. The control method according to claim 3, characterized in that: The cut-off value is calculated and confirmed by the following method: δ = (Tm1-Ta2) / t1; σ = (Tm1-Ta1) / t2; Wherein, δ is a first dividing value, Tm1 is the first preset device temperature, Ta2 is the second preset ambient temperature, and t1 is the maximum of the charging time and the discharging time; σ is the second dividing value, Ta1 is the first preset ambient temperature, t2 is the minimum of the charging time and the discharging time, The temperature smoothing region is (0, δ] and / or [-δ, 0), the temperature changing region is (δ, σ] and / or [-σ, -δ), and the temperature rapidly changing region is (σ, +∞) or (-∞, -σ).

5. The control method according to claim 1, characterized in that: The control method further includes: Obtaining input and output power of the inverter; determining an initial speed of the fan based on the input and output power; The fan is controlled to operate at the initial speed.

6. The control method according to claim 1, characterized in that: The control method further includes: When the real-time temperature of the component is greater than or equal to a first preset component temperature, controlling the inverter to be in a shutdown state; and / or, When the real-time temperature of the component is greater than or equal to the second preset component temperature and less than the first preset component temperature, controlling the fan to operate at a maximum speed; and / or, When the real-time temperature of the component is less than or equal to a third preset component temperature, controlling the fan to be in a shutdown state; and / or, When the real-time temperature of the component is greater than the third preset component temperature and less than the second preset component temperature, the real-time temperature change rate of the component is determined by performing the calculation based on the real-time temperature of the component.

7. A control device for controlling a fan of an inverter, characterized in that: The control device comprises: An acquisition module, configured to acquire the real-time temperature of components of the inverter; a calculation module, configured to determine a real-time temperature change rate of the component based on the real-time temperature of the component when the real-time temperature is within a preset temperature range; a determination module, configured to determine a temperature change rate region in which the real-time temperature change rate is located as a current temperature change rate region, the determination module further configured to obtain a first preset ambient temperature, a second preset ambient temperature, a first preset device temperature, a charging duration, and a discharging duration, the second preset ambient temperature being greater than the first preset ambient temperature; and to calculate and determine a boundary value of a plurality of temperature change rate regions based on the first preset ambient temperature, the second preset ambient temperature, the first preset device temperature, the charging duration, and the discharging duration; and to form a plurality of temperature change rate regions according to the boundary value, the first preset ambient temperature being the lowest ambient temperature at which the inverter can operate, the second preset ambient temperature being the highest ambient temperature at which the inverter can operate, and the first preset device temperature being a protection temperature of the inverter; The control module is used to control the fan to operate at different speed change rates based on different current temperature change rate regions.

8. An inverter, characterized in that: The device comprises a memory and a processor connected to the memory, wherein the memory is used to store a computer program, and the processor is used to execute the computer program to implement the control method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that When the computer-executable instructions are executed by one or more processors, the processors are caused to execute the control method according to any one of claims 1 to 6.

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