Energy storage circuit and control method for control device of air conditioner, device, and storage medium

Abstract

The present application discloses an energy storage circuit and control method for a control device of an air conditioner, a device, and a storage medium. The control device of the air conditioner comprises: a controller and a power supply circuit, wherein the power supply circuit is used for converting an external power supply power supply and then supplying power to the controller; the energy storage circuit is arranged between an output end of the power supply circuit and a power supply end of the controller; the energy storage circuit comprises: a super capacitor switching circuit and a charging circuit, wherein the super capacitor switching circuit comprises multiple super capacitors and a switching device, the switching device comprises a switching circuit arranged between two adjacent super capacitors and is used for controlling the multiple super capacitors to be switched between a first connection state and a second connection state, the first connection state is that the multiple super capacitors are connected in parallel, and the second connection state is that the multiple super capacitors are connected in series; and an output end of the charging circuit is connected to an input end of the super capacitor switching circuit and is used for charging the super capacitors.

Description

Energy storage circuit, control method, device and storage medium of air conditioner control device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202311585019.2 and application date of November 24, 2023, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of control technology, and in particular to an energy storage circuit, a control method, a device and a storage medium for an air conditioner control device. Background Art

[0004] At present, supercapacitors, as a new type of energy storage device, have been widely used in many fields due to their high power density and long cycle life.

[0005] However, in the prior art, when charging a supercapacitor, a switching power supply is generally used to charge the supercapacitor. However, due to the limited output current of the switching power supply, the charging efficiency of the supercapacitor is slow.

[0006] Summary of the Invention

[0007] In view of this, embodiments of the present application provide an energy storage circuit and control method, device, and storage medium for an air conditioner control device, aiming to improve the charging efficiency of a supercapacitor.

[0008] The technical solution of the embodiment of the present application is implemented as follows:

[0009] In a first aspect, an embodiment of the present application provides an energy storage circuit for an air conditioner control device, the air conditioner control device comprising: a controller and a power supply circuit, the power supply circuit being configured to convert and process an external power supply and supply power to the controller, the energy storage circuit being disposed between an output terminal of the power supply circuit and a power supply terminal of the controller, the energy storage circuit comprising:

[0010] A supercapacitor switching circuit, comprising: a plurality of supercapacitors and a switching device;

[0011] The switching device includes a switching circuit provided between two adjacent supercapacitors, for controlling the multiple supercapacitors to switch between a first connection state and a second connection state, wherein the first connection state is that the multiple supercapacitors are connected in parallel, and the second connection state is that the multiple supercapacitors are connected in series;

[0012] A charging circuit, wherein the output end of the charging circuit is connected to the input end of the supercapacitor switching circuit, and is used to charge each of the supercapacitors.

[0013] In some embodiments, the energy storage circuit further comprises:

[0014] A discharge circuit, wherein the input end of the discharge circuit is connected to the output end of the supercapacitor switching circuit, and is used to discharge the output voltage of the supercapacitor switching circuit after boosting it.

[0015] In some embodiments, the energy storage circuit further comprises:

[0016] A current detection control circuit, wherein the output end of the current detection circuit is connected to the input end of the charging circuit, is used to detect the current value of the circuit and generate charging indication information based on the current value, wherein the charging indication information is used to control the conduction of the charging circuit.

[0017] In some embodiments, the switching circuit includes:

[0018] A switching device, comprising:

[0019] a first static contact and a second static contact, wherein the first static contact is connected to a first end of a first supercapacitor, and the second static contact is connected to a second end of the first supercapacitor;

[0020] a first moving contact, a second moving contact, a third moving contact, and a fourth moving contact, wherein the first moving contact is disconnected from the second supercapacitor; the second moving contact and the third moving contact are connected to the first end of the second supercapacitor, and the fourth moving contact is connected to the second end of the second supercapacitor;

[0021] In which, the second supercapacitor is arranged adjacent to the first supercapacitor, the first connection state is a connection state in which the first static contact is connected to the second moving contact, and the second static contact is connected to the fourth moving contact; the second connection state is a connection state in which the first static contact is connected to the first moving contact, and the second static contact is connected to the third moving contact.

[0022] In a second aspect, an embodiment of the present application provides a control method, which is applied to the energy storage circuit described in the first aspect above, and the method includes:

[0023] Get charging instruction information;

[0024] generating a control signal based on the charging indication information and a first set threshold;

[0025] The control signal is a first control signal for controlling the switching device to switch to the second connection state or a second control signal for controlling the switching device to switch to the first connection state.

[0026] In some embodiments, generating a control signal based on the charging indication information and a first set threshold includes:

[0027] Based on the charging indication information, generate the first control signal and obtain a first voltage value, where the first voltage value is an output voltage value of the supercapacitor switching circuit;

[0028] determining that the first voltage value is greater than or equal to a first set threshold, generating the second control signal;

[0029] The first set threshold is the maximum chargeable voltage value of each supercapacitor in the supercapacitor switching circuit.

[0030] In some embodiments, the method further comprises:

[0031] Obtaining discharge indication information;

[0032] Based on the discharge indication information, obtaining a second voltage value, where the second voltage value is an output voltage value of the supercapacitor switching circuit;

[0033] determining whether the second voltage value is greater than or equal to a second set threshold, and if so, generating the first control signal;

[0034] If not, generating the second control signal;

[0035] The second set threshold is the voltage value of the supercapacitor switching circuit corresponding to when the duty cycle of the discharge circuit is maximum.

[0036] In a third aspect, an embodiment of the present application provides a control device, which is applied to the supercapacitor control circuit described in the first aspect above, and the control device includes:

[0037] an acquisition module configured to acquire an operating parameter value of the energy storage circuit in an operating mode, wherein the operating mode includes: a charging mode;

[0038] a generating mode configured to generate a control signal based on the operating parameter value in the charging mode and a first set threshold;

[0039] The control signal is a first control signal for controlling the switching device to switch to the second connection state or a second control signal for controlling the switching device to switch to the first connection state.

[0040] In a fourth aspect, an embodiment of the present application provides an electronic device, comprising: the energy storage circuit as described in the first aspect above, the electronic device further comprising: a processor and a memory for storing a computer program that can be run on the processor, wherein:

[0041] The processor is configured to execute the steps of the method described in the first aspect when running a computer program.

[0042] In a fifth aspect, an embodiment of the present application provides a computer storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in the first aspect are implemented.

[0043] The technical solution provided by the embodiment of the present application provides an energy storage circuit of an air conditioner control device, the air conditioner control device includes: a controller and a power supply circuit, the power supply circuit is used to convert and process the external power supply to supply power to the controller, the energy storage circuit is arranged between the output end of the power supply circuit and the power supply end of the controller, the energy storage circuit includes: a supercapacitor switching circuit and a charging circuit, the supercapacitor switching circuit includes: multiple supercapacitors and a switching device; wherein the switching device includes a switching circuit arranged between two adjacent supercapacitors, for controlling the multiple supercapacitors to switch between a first connection state and a second connection state, the first connection state is multiple supercapacitors connected in parallel, and the second connection state is multiple supercapacitors connected in series; the output end of the charging circuit is connected to the input end of the supercapacitor switching circuit, for charging each supercapacitor. In this way, by controlling the multiple supercapacitors to switch between the first connection state and the second connection state through the switching device, the charging current of the supercapacitor is increased, the charging speed of the supercapacitor is accelerated, and thus the charging rate of the supercapacitor is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] FIG1 is a schematic structural diagram of an energy storage circuit of an air conditioner control device according to an embodiment of the present application;

[0045] FIG2 is a schematic structural diagram of a switching circuit provided in an embodiment of the present application;

[0046] FIG3 is a flow chart of a control method provided in an embodiment of the present application;

[0047] FIG4 is a schematic structural diagram of a supercapacitor circuit provided in one embodiment of the present application;

[0048] FIG5 is a schematic diagram of the structure of a supercapacitor switching circuit provided in an application example of the present application;

[0049] FIG6 is a schematic diagram of the structure of a BUCK charging circuit provided in an application example of the present application;

[0050] FIG7 is a schematic diagram of the structure of a BOOST discharge circuit provided in an application example of the present application;

[0051] FIG8 is a schematic structural diagram of a current detection circuit provided in an application example of the present application;

[0052] FIG9 is a schematic diagram of a supercapacitor charging and discharging process in an application example of the present application;

[0053] FIG10 is a schematic structural diagram of a control device provided in an embodiment of the present application;

[0054] FIG11 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] The present application will be described in further detail below with reference to the accompanying drawings and embodiments.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0057] An embodiment of the present application provides an energy storage circuit for an air conditioner control device, as shown in Figure 1. The air conditioner control device includes: a controller and a power supply circuit, the power supply circuit is used to convert and process an external power supply and supply power to the controller, the energy storage circuit is arranged between the output end of the power supply circuit and the power supply end of the controller, the energy storage circuit includes: a supercapacitor switching circuit and a charging circuit, and the supercapacitor switching circuit includes: multiple supercapacitors and a switching device.

[0058] It is understandable that supercapacitors, as energy storage components, have the characteristics of large capacity and low voltage resistance. Generally speaking, in order to improve the energy storage capacity of supercapacitors, multiple supercapacitors are used simultaneously.

[0059] It is understood that the switching device includes a switching circuit arranged between two adjacent supercapacitors, which is used to control the switching of multiple supercapacitors between a first connection state and a second connection state, wherein the first connection state is a plurality of supercapacitors connected in parallel, and the second connection state is a plurality of supercapacitors connected in series. For example, when the multiple supercapacitors are in the first connection state of parallel connection, the current of each of the multiple supercapacitors is equal. If the total current is I and the number of the multiple supercapacitors is n, then in the parallel connection state, the current value of each supercapacitor is I / n. Generally speaking, in order to ensure the stability of the circuit, multiple supercapacitors are in a parallel connection state.

[0060] For example, when the multiple supercapacitors are in the second connection state of being connected in series, the current of each of the multiple supercapacitors is equal. If the total current is I and the number of the multiple supercapacitors is n, then in the series connection state, the current value of each supercapacitor is I. In the series connection state, the current of each supercapacitor can be increased.

[0061] As you can understand, the output of the charging circuit is connected to the input of the supercapacitor switching circuit to charge each supercapacitor. The charging circuit includes a buck circuit, a step-down DC-DC converter that achieves voltage conversion and constant current output by switching current magnetic flux lines. It controls the output voltage and thus the output current by controlling the on / off time of the PWM switch.

[0062] In this way, by controlling the switching of multiple supercapacitors between the first connection state and the second connection state through the switching device, the charging current of the supercapacitor can be increased (for example, switching from the first connection state to the second connection state), the charging speed of the supercapacitor can be accelerated, and thus the charging rate of the supercapacitor can be improved.

[0063] In some embodiments, referring to FIG. 1 , the energy storage circuit further includes:

[0064] The discharge circuit has an input end connected to the output end of the supercapacitor switching circuit and is used to boost the output voltage of the supercapacitor switching circuit and then discharge it.

[0065] It is understandable that the discharge circuit is used to boost the output voltage of the supercapacitor switching circuit and then discharge it. The discharge circuit includes a boost circuit, and the boost circuit here can be a Boost boost circuit. The Boost circuit is a switching DC boost circuit that can make the output voltage higher than the input voltage. Generally speaking, the target voltage required by the power supply device is higher than the capacitance voltage of each supercapacitor. Therefore, the output end of the supercapacitor switching circuit is connected to the input end of the discharge circuit. After each supercapacitor is discharged, the discharge circuit boosts the discharge voltage of each supercapacitor and outputs it to the power supply device.

[0066] In some embodiments, the energy storage circuit further comprises:

[0067] The current detection control circuit has an output end connected to the input end of the charging circuit, and is used to detect the current value of the circuit and generate charging indication information based on the current value. The charging indication information is used to control the conduction of the charging circuit.

[0068] It can be understood that the current detection control circuit is used to detect the current value of the circuit. When the circuit is powered off, the current value is compared with the set current threshold. If it is less than or equal to the current threshold, charging indication information is generated to control the charging circuit to be turned on. At this time, the charging circuit charges each supercapacitor.

[0069] In this way, the charging circuit is controlled to be turned on by the current detection control circuit, that is, the current value is used to ensure whether the charging circuit is turned on at this time, thereby improving the charging efficiency of the charging circuit and ensuring the stability of the circuit.

[0070] In some embodiments, FIG2 is a schematic diagram of the structure of a switching circuit. As shown in FIG2 , the switching circuit includes:

[0071] The switching device includes: a first static contact 1 and a second static contact 2, a first movable contact 3, a second movable contact 4, a third movable contact 5 and a fourth movable contact 6.

[0072] It is understandable that switching devices include but are not limited to relays, IGBTs (Insulated Gate Bipolar Transistors), MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors), which can also be called MOS tubes, etc.

[0073] It can be understood that, as shown in FIG. 2 , R1 is a switch device, and the switching circuit is located between the first capacitor E1 and the second capacitor E2 , wherein the second supercapacitor E2 is disposed adjacent to the first supercapacitor E1 .

[0074] It can be understood that the switching device R1 includes: a first static contact 1 and a second static contact 2, the first static contact 1 is connected to the first end of the first supercapacitor E1, and the second static contact 2 is connected to the second end of the first supercapacitor E1; the first moving contact 3 is disconnected from the second supercapacitor E2; the second moving contact 4 and the third moving contact 5 are connected to the first end of the second supercapacitor E2, and the fourth moving contact 6 is connected to the second end of the second supercapacitor E2.

[0075] It can be understood that the first connection state is the connection state in which the first static contact 1 is connected to the second moving contact 4, and the second static contact 2 is connected to the fourth moving contact 6; the second connection state is the connection state in which the first static contact 1 is connected to the first moving contact 3, and the second static contact 2 is connected to the third moving contact 5.

[0076] In this way, by controlling the connection of the first static contact, the second static contact, the third moving contact, the fourth moving contact, the fifth moving contact and the sixth moving contact of the switching device, flexible switching of multiple supercapacitors between the first connection state and the second connection state is achieved.

[0077] The present application also provides a control method, as shown in FIG3 , which includes the following steps:

[0078] Step 310: Obtain charging instruction information.

[0079] Here, the control device can obtain charging indication information generated by the current detection control circuit. Exemplarily, the current detection control circuit detects the current value of the circuit and compares the current value with a current threshold. When the current value is small, that is, less than or equal to the current threshold, it generates charging indication information, which is used to control the charging circuit to conduct. At this time, the charging circuit charges each supercapacitor in the energy storage circuit.

[0080] Step 320: Generate a control signal based on the charging indication information and the first set threshold;

[0081] The control signal is a first control signal for controlling the switching device to switch to the second connection state or a second control signal for controlling the switching device to switch to the first connection state.

[0082] Here, the control signal may include a high level signal and a low level signal. Exemplarily, the high level signal is a first control signal for controlling the switching device to switch to the second connection state, and correspondingly, the low level signal is a second control signal for controlling the switching device to switch to the first connection state.

[0083] In this way, based on the charging indication information and the first set threshold, a control signal is generated. The control signal is a first control signal for controlling the switching device to switch to the second connection state, or a second control signal for controlling the switching device to switch to the first connection state, thereby controlling the switching device to switch between the first connection state and the second connection state, thereby controlling the charging current of multiple supercapacitors and improving the charging efficiency.

[0084] In some embodiments, generating a control signal based on the charging indication information and the first set threshold includes:

[0085] Based on the charging indication information, a first control signal is generated, and a first voltage value is obtained, where the first voltage value is an output voltage value of the supercapacitor switching circuit;

[0086] Determining that the first voltage value is greater than or equal to a first set threshold value, generating a second control signal;

[0087] The first set threshold is the maximum chargeable voltage value of each supercapacitor in the supercapacitor switching circuit.

[0088] Here, after obtaining the charging indication information, the control device generates the first control information and controls the switching device to switch to the second connection state, that is, the series state. At this time, the current value of each supercapacitor is increased, thereby accelerating the charging speed of the supercapacitor and thus improving the charging rate of the supercapacitor.

[0089] Here, after obtaining the charging indication information, a first voltage value is obtained, the first voltage value is the output voltage value of the supercapacitor switching circuit, and the first set threshold value is the maximum voltage value of each supercapacitor in the supercapacitor switching circuit that can be charged. When it is determined that the first voltage value is greater than or equal to the first set threshold value, it indicates that each supercapacitor has been charged, and a second control signal is generated to control the switching device to switch to the first connection state, that is, the parallel state, thereby ensuring the stability of the energy storage circuit.

[0090] In some embodiments, the method further comprises:

[0091] Obtaining discharge indication information;

[0092] Based on the discharge indication information, a second voltage value is obtained, where the second voltage value is an output voltage value of the supercapacitor switching circuit;

[0093] determining whether the second voltage value is greater than or equal to a second set threshold, and if so, generating a first control signal;

[0094] If not, generating a second control signal;

[0095] The second set threshold is the voltage value of the supercapacitor switching circuit corresponding to when the duty cycle of the discharge circuit is maximum.

[0096] Here, the control device can also obtain discharge instruction information, where the discharge instruction information is used to instruct each supercapacitor to discharge and output it to the power device after being boosted by the discharge circuit. Generally speaking, the target voltage required by the power supply device is higher than the capacitance voltage of each supercapacitor. Therefore, the supercapacitor switching circuit is connected to the discharge circuit. After each supercapacitor is discharged, the discharge circuit boosts the discharge voltage of each supercapacitor and outputs it to the power supply device.

[0097] Here, the discharge circuit can boost the voltage based on the BOOST circuit. However, the BOOST circuit is affected by its duty cycle. When the duty cycle of the boost circuit reaches its limit, it cannot continue to output stable voltage to the power-consuming device. However, at this time, there is still a large amount of residual power in the supercapacitor, and the supercapacitor voltage utilization rate is low.

[0098] Here, based on the discharge indication information, a second voltage value is obtained, which is the output voltage value of the supercapacitor switching circuit. The second set threshold is the voltage value of the supercapacitor switching circuit corresponding to when the duty cycle of the discharge circuit is maximum. It is determined whether the second voltage value is greater than or equal to the second set threshold. If so, it indicates that the duty cycle of the discharge circuit has reached the limit at this time, and the current of each supercapacitor has also reached the limit, then a first control signal is generated. The first control signal is used to control the switching device to switch to the second connection state, that is, the connection state of each supercapacitor is in series at this time. At this time, the voltage of each supercapacitor is higher than the original voltage, so that the electrical device continues to be powered by the increased voltage, thereby further improving the voltage utilization of the supercapacitor.

[0099] Here, it is determined whether the second voltage value is greater than or equal to the second set threshold value. If not, it indicates that the discharge circuit can normally supply power to the electrical device at this time, and the voltage utilization rate is high, that is, there is no need to further increase the voltage of each supercapacitor at this time, and a second control signal is generated. The second control signal is used to control the switching device to switch to the first connection state, that is, the parallel state, to ensure the stability of the circuit.

[0100] Below, the embodiment of the present application is described in detail with reference to an application example.

[0101] Currently, supercapacitors have the characteristics of large capacity and low withstand voltage. Multiple supercapacitors are generally connected in parallel to increase capacity and improve energy storage capabilities. However, their output voltage does not meet the power supply requirements of normal circuits. Therefore, when using supercapacitors as energy storage devices, a buck circuit is required during charging and a boost circuit is used during discharge.

[0102] However, when charging supercapacitors, a switching power supply is typically used. This power supply has limited output current capability, resulting in slow charging speeds. Furthermore, the buck circuit has a low duty cycle, resulting in low conversion efficiency. When charging a supercapacitor, because the target voltage is significantly higher than the capacitor voltage, the boost circuit's duty cycle reaches its limit and cannot maintain stable output. At this point, a significant amount of charge remains in the capacitor, resulting in low capacitor voltage utilization.

[0103] Based on this, this application example provides a supercapacitor circuit (i.e., the energy storage circuit of the aforementioned air conditioner control device) and a supercapacitor charging and discharging control method. Referring to Figure 4, Figure 4 is a structural schematic diagram of the supercapacitor circuit, wherein the supercapacitor circuit is applied to the control device of the air conditioner. In Figure 4, the control device of the air conditioner includes a controller, a controller power circuit (i.e., a power supply circuit), a power supply detection circuit, an energy storage circuit (i.e., a supercapacitor circuit), a valve body control circuit and a valve body (valve body 1 and valve body 2). Among them, the controller power supply circuit is used to convert and process the external power supply and supply it to the controller, and the energy storage circuit (i.e., the supercapacitor circuit) is arranged between the output end of the power supply circuit and the power supply end of the controller.

[0104] Exemplarily, the controller power supply circuit is used to supply power to the controller and includes a power supply, a rectifier circuit, a filter circuit, a switching power supply circuit, and a controller power supply voltage regulator circuit. The controller power supply voltage regulator circuit is used to stabilize the input voltage and output it to the controller. The output voltage of the controller power supply voltage regulator circuit is Vcc = 5V & 12V. When powered on, the switching power supply circuit supplies power to the control chip through the controller power supply voltage regulator circuit. The control chip can then send a valve control signal to valve body 1 and / or valve body 2 via the valve body control circuit to achieve corresponding valve body operation control of valve body 1 and / or valve body 2.

[0105] In this application example, the supercapacitor circuit includes: a supercapacitor switching circuit, a BUCK charging circuit, a BOOST discharging circuit, and a current detection control circuit. Figure 5 is a structural diagram of the supercapacitor switching circuit. As shown in Figure 5, the supercapacitor switching circuit includes: 5 supercapacitors, which respectively include: a first supercapacitor E1, a second supercapacitor E2, a third supercapacitor E3, a fourth supercapacitor E4, a fourth supercapacitor E5, and a switching device, including a switching circuit arranged between two adjacent supercapacitors. In this application example, it includes a switching circuit 1 between E1 and E2, a switching circuit 2 between E2 and E3, a switching circuit 3 between E3 and E4, and a switching circuit 4 between E4 and E5.

[0106] In Figure 5 , each switching circuit includes relays RY1, RY2, RY3, and RY4. Relay RY1 includes a first stationary contact 1, a second stationary contact 2, a first movable contact 3, a second movable contact 4, a third movable contact 5, and a fourth movable contact 6.

[0107] The relay RY1 further includes a SERIAL / PARALLEL control signal receiving port, which includes a first terminal 7 and a second terminal 8, wherein the first terminal 7 is used to receive a control signal, and the second terminal 8 is connected to the power supply VCC.

[0108] Here, taking the switching circuit 1 between E1 and E2 as an example, the first static contact 1 is connected to the first end of the first supercapacitor E1, and the second static contact 2 is connected to the second end of the first supercapacitor E1; the second moving contact 4 and the third moving contact 5 are connected to the first end of the second supercapacitor E2, and the fourth moving contact 6 is connected to the second end of the second supercapacitor E2;

[0109] Among them, the second supercapacitor E2 is arranged adjacent to the first supercapacitor E1. Taking the switching circuit 1 between E1 and E2 as an example, when SERIAL / PARALLEL is pulled high, SERIAL / PARALLEL is at a high level, and can be controlled to switch to a series state (that is, the aforementioned first connection state). The series state is a connection state in which the first static contact 1 is connected to the second moving contact 3, and the second static contact 2 is connected to the fourth moving contact 6; at this time, the current of each supercapacitor is increased, thereby accelerating the charging speed of the supercapacitor, thereby improving the charging rate of the supercapacitor.

[0110] When SERIAL / PARALLEL is pulled low, SERIAL / PARALLEL is at a low level, and can be controlled to switch to a parallel state (i.e., the aforementioned second connection state). The parallel state is a connection state in which the first static contact 1 is connected to the first moving contact 3, and the second static contact 2 is connected to the third moving contact 5.

[0111] Here, the output end of the supercapacitor also includes SuperCap-V-dec (voltage detection port) and SuperCap-I-dec (current detection port).

[0112] FIG6 is a schematic diagram of the structure of a buck charging circuit (i.e., the aforementioned charging circuit). The output end of the charging circuit is connected to the input end of the supercapacitor switching circuit for charging each supercapacitor. As shown in FIG5 , the buck charging circuit includes a buck chip IC14. IC14 includes nine pins, including a first pin BOOT (input / output pin); a second pin VIN (power input voltage pin); and a third pin EN (enable pin). Generally, a high level activates the buck chip. In FIG5 , the EN pin is connected to the buck-en terminal. The buck-en terminal can receive the high and low levels of the current detection circuit. If a high level is received, the buck chip starts to operate, and the buck charging circuit begins to charge each supercapacitor. The high level here is the aforementioned charging indication information.

[0113] The fourth pin, RT / SYNC (clock pulse pin), can be used to adjust the frequency of the buck charging circuit; the fifth pin, FB (output voltage feedback pin); and the sixth pin, PGOOD (open-drain output pin), are pulled low if the output voltage is out of regulation (out of the range of ±10% of the required output voltage) or when a fault is detected. The pin outputs a high level when the output voltage is normal.

[0114] The seventh pin is GND (ground pin); the eighth pin is SW (switch control pin), which is used to control the opening and closing of subsequent circuits, thereby controlling the working state of the buck charging circuit; the ninth pin is PAD (pad pin), which generally refers to a large metal area at the bottom of the chip, used for heat dissipation and electromagnetic shielding, etc., and generally must be grounded.

[0115] This application example also provides a BOOST discharge circuit. FIG7 is a schematic diagram of the structure of the BOOST discharge circuit. The input end of the BOOST discharge circuit is connected to the output end of the supercapacitor switching circuit to boost the output voltage of the supercapacitor switching circuit and then discharge it.

[0116] As shown in FIG7 , the BOOST discharge circuit includes a boost chip IC23. IC23 has 13 pins, including: the first pin VDC (forced power-on pin); the second pin VIN (power input voltage pin); the third pin COMP (internal error amplifier output pin); the fourth pin SS (soft-start programming pin); the fifth pin FSW (switching pin), which can set the switching frequency of the boost chip; the sixth pin FAULT; the seventh pin FB (output voltage feedback pin); the eighth pin OVP; the ninth pin ISW; and the tenth pin GND (ground pin).

[0117] The eleventh pin, DRV, is connected to the gate drive terminal of the PMOS tube, which can control the on and off of the PMOS. The sampling point is connected to the S stage of the MOS tube and is not directly grounded. The twelfth pin, EN (enable pin), is connected to the Battery-Boost-Control terminal. Based on the terminal, it receives a high-level signal or a low-level signal. When the level is high, the chip works. At this time, the BOOST discharge circuit boosts the voltage and discharges it to the outside, that is, BOOST discharge is performed. When the level is low, the chip is shut down. At this time, the BOOST discharge circuit does not perform BOOST discharge.

[0118] The thirteenth pin is PAD (pad pin). The PAD here generally refers to a large metal area at the bottom of the chip, which is used for heat dissipation, electromagnetic shielding, etc. and generally needs to be grounded.

[0119] The current detection control circuit is shown in Figure 8. The output terminal (BUCK en) of the current detection control circuit is connected to the output terminal (EN enable pin) of the BUCK charging circuit. It is used to detect the current value of the circuit and generate charging indication information (i.e., high level) based on the current value. This charging indication information is used to control the conduction of the charging circuit.

[0120] The current detection circuit includes a detection chip IC26, which can detect both current and voltage. The detection chip includes: a first pin 1 (OUT1) for outputting the current detection result; a second pin 2 (-IN1) for obtaining the circuit's input current; a third pin 3 (+IN1) for obtaining the circuit's input current; and a fourth pin for grounding. When the OUT1 output current detection result is greater than 0.5A, BUCK en is pulled low, generating a low-level signal, indicating that the BUCK charging circuit is not required to perform constant-current charging on the supercapacitors. When the input current is less than or equal to 0.5A, BUCK en is pulled high, generating a high-level signal, i.e., charging indication information, which is used to control the conduction of the BUCK charging circuit. Based on the high level output of the EN enable pin in the BUCK charging circuit, the BUCK charging circuit is controlled to conduct.

[0121] Detection chip IC26 can also detect voltage, thereby controlling the opening or closing of an external power supply. Detection chip IC26 also includes: a fifth pin (+IN2) for obtaining the circuit's input voltage; a sixth pin (-IN2) for obtaining the circuit's input voltage; and a seventh pin (OUT1) for outputting the voltage detection result. If the voltage detection result is less than 10.3V, the terminal 12V-POWER-OFF is pulled up to connect the circuit to the external power supply. If the voltage detection result is greater than or equal to 10.3V, the terminal 12V-POWER-OFF is pulled down to disconnect the circuit from the external power supply.

[0122] This application example provides a supercapacitor charge and discharge control method. Referring to FIG9 , the specific steps include:

[0123] Step 901: Power on the electronic control.

[0124] Step 902: Standby.

[0125] Step 903: Detect the power level of the supercapacitor.

[0126] The current detection control circuit detects the circuit's current value and compares it with a set current threshold. If the current value is less than or equal to the set current threshold, a charging instruction is generated. This charging instruction is sent to the BUCK-en terminal of the buck charging circuit based on the BUCK en terminal in the current detection circuit. This charging instruction is used to control the charging circuit. If the current value is greater than the set current threshold, no charging instruction is generated. The set current threshold can be 0.5A.

[0127] Step 904: Determine whether a charging instruction is received.

[0128] If yes, execute step 905; if no, execute step 906.

[0129] Step 905: Switch the supercapacitors to a series connection state.

[0130] The switching power supply outputs a VCC (+12V) voltage, which is then stepped down by the BUCK module and charged to supercapacitors E1-E5 at a constant current I. Due to the limited output current capability of the switching power supply, the charging speed of the five capacitors connected in parallel is slow, and the charging current for each capacitor is 1 / 5*I.

[0131] If charging indication information is determined to be obtained, a first control signal is generated based on the charging indication information. The first control signal is used to control the switching device to switch to the series state. Specifically, upon receiving the first control signal, the switching device pulls the SERIAL / PARALLEL signal high (RY1-RY4 are disconnected), placing the five capacitors in series. Each capacitor is charged with a current of 1 and the charging time is reduced to 1 / 5 of the original value, thereby improving charging speed and efficiency.

[0132] After the switching is completed, step 907 is executed.

[0133] Step 906: Determine whether a discharge instruction is received.

[0134] If it is determined that the current detection circuit has not generated the charging instruction information, it is determined whether a discharging instruction is received.

[0135] If yes, execute step 908 ; if no, execute step 902 .

[0136] Step 907: BUCK constant current charging.

[0137] When the control switching device switches to the series state, the multiple supercapacitors are charged with a BUCK constant current, and a first voltage value is obtained in real time based on SuperCap-V-dec. The first voltage value is the output voltage value of the supercapacitor switching circuit, and step 909 is executed.

[0138] Step 908: Check whether the supercapacitor voltage reaches a second threshold.

[0139] After determining that the discharge instruction has been obtained, it is determined whether the capacitor voltage (i.e., the aforementioned second voltage value) reaches the second set threshold. The second set threshold is the voltage value of the supercapacitor switching circuit corresponding to the maximum duty cycle of the discharge circuit. If so, execute step 910; if not, execute step 911.

[0140] Step 909: Determine whether to continue charging.

[0141] If it is determined that the first voltage value is greater than or equal to the first set threshold, a second control signal is generated, where the first voltage value is the output voltage value of the supercapacitor switching circuit. If it is determined that the first voltage value is greater than or equal to the first set threshold, which is the maximum chargeable voltage value of each supercapacitor in the supercapacitor switching circuit, step 912 is executed.

[0142] Step 910: Switch to the supercapacitor series connection state.

[0143] When BOOST is discharging, the SERIAL / PARALLEL signal is pulled low (RY1-RY4 are all closed), and the five capacitors are in parallel.

[0144] During the discharge process, the capacitor voltage drops to a point where the BOOST circuit's on-duty cycle is maximum, that is, the boost circuit's power supply input voltage is minimum. After determining whether the second voltage value is greater than or equal to the second set threshold, a first control signal is generated, switching to a series state (SERIAL / PARALLEL signal is pulled high). At this time, the voltage Vcap+ is increased to 5 times the original value and continues to power the BOOST circuit, thereby improving the capacitor voltage utilization rate. After the execution is completed, the process proceeds to step 913.

[0145] Step 911: Switch to supercapacitor parallel state

[0146] If not, a second control signal is generated to control the switching device to switch to a parallel state (SERIAL / PARALLEL signal is pulled low).

[0147] After the execution is completed, go to step 913.

[0148] Step 912: Charging is completed, and the supercapacitors are switched to parallel connection.

[0149] If it is determined that the first voltage value is greater than or equal to the first set threshold, it indicates that the supercapacitors are fully charged, and a second control signal is generated to control the switching device to switch to a parallel state (SERIAL / PARALLEL signal is pulled low).

[0150] Step 913: BOOST discharge.

[0151] Step 914: Whether to continue discharging.

[0152] Here, whether to continue discharging can be determined based on the electrical device and the current circuit state, and an instruction to stop discharging can be generated. If the control device receives the instruction to stop discharging, then if it is negative, i.e., it is determined not to continue discharging, then step 902 is executed. If it does not receive the instruction to stop discharging, then if it is positive, then step 908 is executed.

[0153] The technical solution provided in this application example improves the voltage utilization efficiency of supercapacitors and speeds up charging by changing the series and parallel states of multiple capacitors through logically controlled switching devices (such as relays, IGBTs, MOSFETs, etc.).

[0154] As shown in Figure 10, the control device 1000 includes: an acquisition module 1010 and a generation module 1020, the acquisition module 1010 is configured to obtain charging indication information; the generation module 1020 is configured to generate a control signal based on the charging indication information and a first set threshold; wherein the control signal is a first control signal for controlling the switching device to switch to the second connection state or a second control signal for controlling the switching device to switch to the first connection state.

[0155] In some embodiments, the generation module 1020 is further configured to generate a first control signal based on the charging indication information and obtain a first voltage value, where the first voltage value is the output voltage value of the supercapacitor switching circuit; the control device also includes a determination module 1030, and the determination module 1030 is further configured to determine that the first voltage value is greater than or equal to a first set threshold value, and then generate a second control signal; wherein the first set threshold value is the maximum voltage value that can be charged for each supercapacitor in the supercapacitor switching circuit.

[0156] In some embodiments, the acquisition module 1010 is further configured to obtain discharge indication information; based on the discharge indication information, obtain a second voltage value, the second voltage value being the output voltage value of the supercapacitor switching circuit; the determination module 1030 is further configured to determine whether the second voltage value is greater than or equal to a second set threshold value, and if so, generate a first control signal; if not, generate a second control signal; wherein the second set threshold value is the voltage value of the supercapacitor switching circuit corresponding to when the duty cycle of the discharge circuit is maximum.

[0157] In actual application, the acquisition module 1010, the generation module 1020 and the determination module 1030 can be implemented by a processor in the control device. Of course, the processor needs to run the computer program in the memory to implement its functions.

[0158] It should be noted that the control device provided in the above embodiment is merely illustrated by the division of the above program modules. In actual applications, the above processing can be assigned to different program modules as needed, that is, the internal structure of the device can be divided into different program modules to complete all or part of the above-described processing. In addition, the control device and control method embodiments provided in the above embodiment are based on the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0159] Based on the hardware implementation of the above program modules and in order to implement the method of the embodiment of the present application, the embodiment of the present application further provides an electronic device. Figure 11 only shows an exemplary structure of the electronic device rather than the entire structure. Part or all of the structure shown in Figure 11 can be implemented as needed.

[0160] As shown in Figure 11, the electronic device 1100 provided in an embodiment of the present application includes: at least one processor 1101, a memory 1102, a user interface 1103, and at least one network interface 1104. The various components in the electronic device 1100 are coupled together via a bus system 1105. It will be understood that the bus system 1105 is used to implement connection and communication between these components. In addition to including a data bus, the bus system 1105 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, in Figure 11, various buses are labeled as bus system 1105.

[0161] The user interface 1103 may include a display, a keyboard, a mouse, a trackball, a click wheel, keys, buttons, a touch pad or a touch screen.

[0162] The memory 1102 in the embodiment of the present application is used to store various types of data to support the operation of the electronic device. Examples of such data include: any computer program used to operate on the electronic device.

[0163] The control method disclosed in the embodiments of the present application can be applied to the processor 1101 or implemented by the processor 1101. The processor 1101 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the control method can be completed by the hardware integrated logic circuit in the processor 1101 or by instructions in the form of software. The above-mentioned processor 1101 can be a general-purpose processor, a digital signal processor (DSP), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The processor 1101 can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiments of the present application. The general-purpose processor can be a microprocessor or any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in the memory 1102. The processor 1101 reads the information in the memory 1102 and completes the steps of the control method provided in the embodiments of the present application in combination with its hardware.

[0164] In an exemplary embodiment, the electronic device may be implemented by one or more application specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers (MCUs), microprocessors, or other electronic components to perform the aforementioned method.

[0165] It is understood that the memory 1102 can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disk, or a compact disc read-only memory (CD-ROM); the magnetic surface memory can be a magnetic disk or a magnetic tape. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus random access memory (DRRAM).The memories described in the embodiments of this application are intended to include, but are not limited to, these and any other suitable types of memories.

[0166] In an exemplary embodiment, the present application also provides a storage medium, namely, a computer storage medium, which may be a computer-readable storage medium, for example, including a memory 1102 storing a computer program. The computer program may be executed by a processor 1101 of an electronic device to complete the steps of the method of the present application. The computer-readable storage medium may be a memory such as a ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface storage, optical disk, or CD-ROM.

[0167] It should be noted that: "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0168] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0169] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An energy storage circuit of an air conditioner control device, the air conditioner control device comprising: A controller and a power supply circuit, wherein the power supply circuit is used to convert an external power supply and supply power to the controller, and the energy storage circuit is arranged between the output end of the power supply circuit and the power supply end of the controller, and the energy storage circuit includes: A supercapacitor switching circuit, the supercapacitor switching circuit comprising: a plurality of supercapacitors and a switching device; The switching device includes a switching circuit disposed between two adjacent supercapacitors, and is used to control the multiple supercapacitors to switch between a first connection state and a second connection state, wherein the first connection state is that the multiple supercapacitors are connected in parallel, and the second connection state is that the multiple supercapacitors are connected in series; A charging circuit, wherein the output end of the charging circuit is connected to the input end of the supercapacitor switching circuit, and is used to charge each of the supercapacitors.

2. The energy storage circuit of the air conditioner control device according to claim 1, wherein: The energy storage circuit also includes: A discharge circuit, wherein the input end of the discharge circuit is connected to the output end of the supercapacitor switching circuit, and is used to discharge the output voltage of the supercapacitor switching circuit after boosting it.

3. The energy storage circuit according to claim 1, wherein: The energy storage circuit also includes: A current detection control circuit, wherein the output end of the current detection circuit is connected to the input end of the charging circuit, and is used to detect the current value of the circuit, and based on the current value, generate charging indication information, and the charging indication information is used to control the conduction of the charging circuit.

4. The energy storage circuit according to claim 1, wherein: The switching circuit comprises: A switch device, the switch device comprising: A first static contact and a second static contact, wherein the first static contact is connected to a first end of a first super capacitor, and the second static contact is connected to a second end of the first super capacitor; A first moving contact, a second moving contact, a third moving contact and a fourth moving contact, wherein the first moving contact is disconnected from the second super capacitor; the second moving contact and the third moving contact are connected to the first end of the second super capacitor, and the fourth moving contact is connected to the second end of the second super capacitor; Among them, the second supercapacitor is arranged adjacent to the first supercapacitor, the first connection state is a connection state in which the first static contact is connected to the second moving contact, and the second static contact is connected to the fourth moving contact; the second connection state is a connection state in which the first static contact is connected to the first moving contact, and the second static contact is connected to the third moving contact.

5. A control method, applied to the energy storage circuit according to any one of claims 1 to 4, the method comprising: Get charging instruction information; generating a control signal based on the charging indication information and a first set threshold; The control signal is a first control signal for controlling the switching device to switch to the second connection state or a second control signal for controlling the switching device to switch to the first connection state.

6. The method according to claim 5, wherein: The generating a control signal based on the charging indication information and the first set threshold comprises: Based on the charging indication information, generate the first control signal, and obtain a first voltage value, where the first voltage value is an output voltage value of the supercapacitor switching circuit; Determining that the first voltage value is greater than or equal to a first set threshold value, generating the second control signal; The first set threshold is the maximum chargeable voltage value of each supercapacitor in the supercapacitor switching circuit.

7. The method according to claim 5, wherein: The method further comprises: Obtaining discharge indication information; Based on the discharge indication information, obtaining a second voltage value, where the second voltage value is an output voltage value of the supercapacitor switching circuit; determining whether the second voltage value is greater than or equal to a second set threshold, and if so, generating the first control signal; If not, generating the second control signal; Among them, the second set threshold is the voltage value of the supercapacitor switching circuit corresponding to the maximum duty cycle of the discharge circuit.

8. A control device, applied to the supercapacitor control circuit according to any one of claims 1 to 4, the control device comprising: An acquisition module configured to acquire an operating parameter value of the energy storage circuit in an operating mode, wherein the operating mode includes: a charging mode; A generation mode configured to generate a control signal based on the operating parameter value in the charging mode and a first set threshold value; The control signal is a first control signal for controlling the switching device to switch to the second connection state or a second control signal for controlling the switching device to switch to the first connection state.

9. An electronic device, comprising: The energy storage circuit according to claims 1 to 4, wherein the electronic device further comprises: a processor and a memory for storing a computer program that can be run on the processor, wherein: The processor is configured to execute the steps of the method according to any one of claims 5 to 7 when running a computer program.

10. A computer storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of the method according to any one of claims 5 to 7 are implemented.

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