Passive device having multi-path storage and control method for passive device

Abstract

Embodiments of the present application​ provide a passive device having multi-path storage and a control method for a passive device. The passive device comprises: an antenna circuit; a storage circuit, connected to the antenna circuit and used for storing electric energy outputted by the antenna circuit; and a load. The storage circuit comprises a plurality of storage branches, each storage branch comprises at least one storage capacitor, rated voltages of different storage branches are different, and one or more storage branches among the plurality of storage branches are in communication with the antenna circuit and the load.

Description

A passive device for multi-channel storage and a control method for the passive device

[0001] This application claims the priority of the Chinese patent application with application number 202410030750.7 filed with the Patent Office of China on January 9, 2024, and entitled “Passive device for multi-channel storage and control method of passive device”; the priority of the Chinese patent application with application number 202410031226.1 filed with the Patent Office of China on January 9, 2024, and entitled “Passive device and control method of passive device”; the priority of the Chinese patent application with application number 202420064594.1 filed with the Patent Office of China on January 9, 2024, and entitled “Passive device with adjustable oscillation frequency”; and the priority of the Chinese patent application with application number 202420062561.3 filed with the Patent Office of China on January 9, 2024, and entitled “Passive driving circuit and passive device”; all the contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of electronic technology, and in particular to a passive device for multi-channel storage and a control method for the passive device. Background Art

[0003] Currently, electronic locks can be unlocked using passwords or fingerprints, eliminating the need to carry a mechanical key, which is extremely convenient. A battery must be installed inside the electronic lock to provide energy for passwords or fingerprints. However, because electronic locks consume a lot of power, the battery must be charged regularly. Failure to charge the battery promptly can lead to insufficient battery power and the inability to unlock the electronic lock, causing significant inconvenience. Therefore, a passive electronic lock is provided in the related art, i.e., an electronic lock that does not have a battery installed inside. The passive electronic lock is powered by an external device, such as NFC technology. The external device then powers the passive electronic lock, which then stores enough energy in a storage capacitor to power the passive electronic lock. However, the waiting time for the passive electronic lock to operate after the storage capacitor is fully charged is relatively long. Technical issues

[0004] The embodiments of the present application provide a multi-channel storage passive device and a control method for the passive device, which can solve the problem of long waiting time for users. Technical Solutions

[0005] In a first aspect, an embodiment of the present application provides a passive device, comprising:

[0006] Antenna circuit, used for receiving micro energy in the environment and converting it into electrical energy;

[0007] a storage circuit, connected to the antenna circuit, for storing the electrical energy;

[0008] a load connected to the storage circuit;

[0009] The storage circuit includes multiple storage branches, each storage branch includes at least one storage capacitor, different storage branches have different rated voltages, and one or more of the multiple storage branches are connected to the antenna circuit and the load.

[0010] In some embodiments, the passive device further comprises:

[0011] A processor is connected to the antenna circuit and the storage circuit, and the processor charges different storage branches in order from small to large rated voltage.

[0012] In some embodiments, the multiple storage branches include at least a first storage branch and a second storage branch, the rated voltage of the first storage branch is less than the rated voltage of the second storage branch, the processor controls the antenna circuit to charge the first storage branch, and charges the second storage branch after the first storage branch is fully charged.

[0013] In some embodiments, the passive device further comprises:

[0014] A processor is connected to the antenna circuit and the storage circuit, the processor obtains the output current of the electric energy output by the antenna circuit, and the processor selects one or more storage branches from the multiple storage branches to be connected to the antenna circuit and the load based on the output current.

[0015] In some embodiments, among any two of the storage branches, the leakage current of the storage branch with a larger rated voltage is greater than the leakage current of the storage branch with a smaller rated voltage, and / or the capacitance of the storage branch with a larger rated voltage is greater than the capacitance of the storage branch with a smaller rated voltage.

[0016] In some embodiments, each of the storage branches includes a storage capacitor; or

[0017] At least one of the plurality of storage branches includes a plurality of storage capacitors connected in parallel or in series.

[0018] In some embodiments, the passive device further comprises:

[0019] A rectifier circuit is arranged between the antenna circuit and the storage circuit. The rectifier circuit includes multiple rectifier branches connected in parallel. Different rectifier branches have different conduction voltages and / or internal resistances. One of the multiple rectifier branches is connected to the antenna circuit and the load.

[0020] In some embodiments, the passive device further comprises:

[0021] A processor is connected to the antenna circuit and the rectifier circuit. Different rectifier branches have different conduction voltages. The processor obtains a first voltage of the electric energy output by the antenna circuit. The processor selects one of the multiple rectifier branches to connect to the antenna circuit and the load based on the first voltage.

[0022] In some embodiments, the processor obtains the on-state voltage of each of the rectifier branches, and determines a target on-state voltage that is less than the first voltage and closest to the first voltage from the multiple on-state voltages, determines a target rectifier branch from the multiple rectifier branches based on the target on-state voltage, and connects the target rectifier branch to the antenna circuit and the load.

[0023] In some embodiments, the passive device further comprises:

[0024] A processor is connected to the antenna circuit and the rectifier circuit. Different rectifier branches have different internal resistances. The processor obtains a first duration for the antenna circuit to output electrical energy. The processor selects one of the multiple rectifier branches to connect to the antenna circuit and the load based on the first duration.

[0025] In some embodiments, the plurality of rectifier branches include at least a first rectifier branch and a second rectifier branch, and the internal resistance of the first rectifier branch is greater than the conduction voltage of the second rectifier branch;

[0026] When the first duration is lower than a first duration threshold, the processor controls the first rectifying branch to be connected to the antenna circuit and the load;

[0027] When the first duration is not less than a first duration threshold, the processor controls the second rectifying branch to be connected to the antenna circuit and the load.

[0028] In some embodiments, the antenna circuit includes an antenna and an oscillation circuit, and parameters of the oscillation circuit are adjustable to change the oscillation frequency of the antenna, and the electric energy output by the antenna circuit after the change is greater than the electric energy output by the antenna circuit before the change.

[0029] In some embodiments, the parameters of the oscillation circuit are adjustable so that the oscillation frequency of the antenna varies in a preset direction within a preset frequency range;

[0030] The load includes a monitoring circuit, which monitors the electric energy output by the antenna circuit and determines the target oscillation frequency and target parameters corresponding to the maximum electric energy, so that the parameters of the oscillation circuit are adjusted to the target parameters and the oscillation frequency of the antenna is the target oscillation frequency.

[0031] In some embodiments, the load includes a driving circuit, and the processor obtains an energy value stored in the storage circuit. When the energy value exceeds an energy threshold, the processor controls the driving circuit to obtain part of the electrical energy in the storage circuit for operation.

[0032] In some embodiments, the processor monitors the electrical energy stored in the storage circuit. When the stored electrical energy exceeds a storage threshold, the processor outputs a pulse modulation control signal to the drive circuit so that the drive circuit obtains part of the electrical energy of the storage circuit.

[0033] In a second aspect, an embodiment of the present application further provides a control method for a passive device, wherein the passive device includes an antenna circuit, a storage circuit, and a load, wherein the antenna circuit is used to receive micro-energy in the environment and convert it into electrical energy, and the storage circuit is connected to the antenna circuit for storing the electrical energy. The storage circuit includes multiple storage branches, each storage branch includes at least one storage capacitor, and different storage branches have different rated voltages. The load is connected to the storage circuit; the method includes:

[0034] obtaining a rated voltage of each of the storage branches;

[0035] According to the rated voltage of each storage branch, one or more storage branches are selected from the plurality of storage branches to be connected to the antenna circuit and the load.

[0036] In some embodiments, selecting one or more storage branches from a plurality of storage branches to be connected to the antenna circuit and the load based on the rated voltage of each storage branch includes:

[0037] Obtaining a charging state of each of the storage branches;

[0038] If none of the storage branches is in a charging state, determining the storage branch with the smallest rated voltage from the multiple storage branches as a target storage branch, and charging the target storage branch;

[0039] If any of the storage branches is in a charging state, determining the storage branch with the smallest rated voltage from the plurality of storage branches that are not in a charging state as a target storage branch;

[0040] After the storage branch currently in a charging state is fully charged, the target storage branch is charged.

[0041] In some embodiments, the plurality of storage branches include at least a first storage branch and a second storage branch, and the rated voltage of the first storage branch is less than the rated voltage of the second storage branch; the control method further includes:

[0042] controlling the antenna circuit to charge the first storage branch;

[0043] After the first storage branch is fully charged, the first storage branch is controlled to charge the second storage branch.

[0044] In some embodiments, the passive circuit further includes a rectifier circuit, the rectifier circuit being connected between the antenna circuit and the storage circuit, the rectifier circuit being configured to rectify the electrical energy output by the antenna circuit, the rectifier circuit including multiple rectifier branches connected in parallel, different rectifier branches having different conduction voltages; and the notification method further includes:

[0045] obtaining a first voltage of electric energy output by the antenna circuit;

[0046] According to the first voltage, one of the plurality of rectifying branches is selected to be connected to the antenna circuit and the storage circuit.

[0047] In some embodiments, the passive circuit further includes a rectifier circuit, the rectifier circuit being connected between the antenna circuit and the storage circuit, the rectifier circuit being configured to rectify the electrical energy output by the antenna circuit, the rectifier circuit including multiple rectifier branches connected in parallel, different rectifier branches having different internal resistances, and the load being connected to the rectifier circuit; the method comprising:

[0048] Obtaining a first duration of time during which the antenna circuit outputs electrical energy;

[0049] According to the first time length, one of the plurality of rectifying branches is selected to be connected to the antenna circuit and the storage circuit. Beneficial effects

[0050] In the passive device of the present embodiment, the antenna circuit converts ambient micro-energy into electrical energy. This electrical energy is then stored in a storage circuit, which then powers the load, eliminating the need for a battery. The storage circuit includes multiple storage branches, each with a different rated voltage. Storage branches with different rated voltages can provide different drive voltages, allowing them to supply different voltages to different loads. For example, a lower voltage can be provided to a low-power load, while a higher voltage can be provided to a high-power load. When a lower drive voltage is required, the storage branch with the lower rated voltage can be fully charged before powering the corresponding load, allowing the load to operate more quickly without having to wait for the storage branch with the higher rated voltage to fully charge before powering the corresponding load, thus reducing user waiting time. This solves the problem in related art where a single storage capacitor is used to store energy, resulting in long user wait times. It is understandable that a storage branch with a higher rated voltage takes longer to fully charge. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] FIG1 is a schematic diagram of a first structure of a passive device for multi-channel storage provided in an embodiment of the present application.

[0052] FIG2 is a second structural diagram of a passive device for multi-channel storage provided in an embodiment of the present application.

[0053] FIG3 is a schematic diagram of a third structure of a passive device for multi-channel storage provided in an embodiment of the present application.

[0054] FIG4 is a schematic diagram of a fourth structure of a passive device for multi-channel storage provided in an embodiment of the present application.

[0055] FIG5 is a fifth structural diagram of a passive device for multi-channel storage provided in an embodiment of the present application.

[0056] FIG6 is a sixth structural diagram of a passive device for multi-channel storage provided in an embodiment of the present application.

[0057] FIG7 is a seventh structural diagram of a passive device for multi-channel storage provided in an embodiment of the present application.

[0058] FIG8 is a flow chart of a method for controlling a passive device according to an embodiment of the present application. Modes for Carrying Out the Invention

[0059] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0060] An embodiment of the present application provides a passive device with multi-channel storage. Please refer to Figure 1, which is a schematic diagram of the first structure of the passive device with multi-channel storage provided by the embodiment of the present application. The passive device 10 with multi-channel storage includes an antenna circuit 11, a storage circuit 15 and a load 13. The antenna circuit 11 is used to receive micro-energy in the environment and convert it into electrical energy. For example, the antenna circuit 11 can collect radio frequency energy, light energy or other micro-energy in the environment, and then convert the micro-energy into electrical energy. The storage circuit 15 is connected to the antenna circuit 11 for storing electrical energy. The load 13 is connected to the storage circuit 15, and the storage circuit 15 supplies power to the load 13. For example, the load 13 may include at least one of a driving circuit, a wireless communication circuit, a monitoring circuit, etc.

[0061] The storage circuit 15 includes multiple storage branches 152, each of which includes at least one storage capacitor. Different storage branches 152 have different rated voltages. One or more of the multiple storage branches 152 are connected to the antenna circuit 11 and the load 13. After the electrical energy output by the antenna circuit 11 is stored in the storage circuit 15, the storage circuit 15 can power the passive device 10, thereby eliminating the need for a battery in the passive device 10. Storage branches 152 with different rated voltages can provide different driving voltages, thereby providing different voltages to different loads 13. For example, a lower voltage can be provided to a low-power load 13, while a higher voltage can be provided to a high-power load 13.

[0062] It can be understood that the rated voltage of the storage branch 152 is positively correlated with the provided driving voltage, and the driving voltage that can be provided by the storage branch 152 after being fully charged can be equal to the rated voltage of the storage branch 152 .

[0063] In some embodiments, the storage branch 152 with a lower rated voltage can provide a lower driving voltage to a low-power load 13, such as a wireless communication circuit, while the storage branch 152 with a higher rated voltage can provide a higher driving voltage to a high-power load 13, such as a drive circuit. For example, the passive device 10 is a passive lock that includes a drive circuit for driving a motor and a wireless communication circuit. The storage branch 152 with a lower rated voltage can power the wireless communication circuit for wireless communication with an external device. The storage branch 152 with a higher rated voltage can power the drive circuit so that the drive circuit drives the motor.

[0064] If wireless communication is required, the storage branch 152 with a lower rated voltage can be connected to the wireless communication circuit of the antenna circuit 11 and the load 13, so that the storage branch 152 can be fully charged more quickly and the wireless communication circuit can be powered more quickly.

[0065] If motor driving is required, the storage branch 152 with a higher rated voltage can be connected to the wireless communication circuit of the antenna circuit 11 and the load 13 to obtain a larger driving voltage, so that there is a sufficiently high voltage to drive the circuit to work.

[0066] In some embodiments, of any two storage branches 152, the leakage current of the storage branch 152 with a higher rated voltage is greater than the leakage current of the storage branch 152 with a lower rated voltage. That is, the rated voltage and leakage current of the storage branch 152 are positively correlated. The higher the rated voltage of the storage branch 152, the greater its leakage current, and the lower the rated voltage of the storage branch 152, the lower its leakage current.

[0067] It is understood that a storage capacitor consists of two electrodes and a dielectric disposed between the two electrodes. The dielectric cannot be absolutely non-conductive. When a DC voltage is applied to the storage capacitor, leakage current will be generated in the storage capacitor. The calculation formula can be simplified to: I = K × C × V;

[0068] Where I is the leakage current, K is a constant, C is the capacity of the storage capacitor, and V is the rated voltage of the storage capacitor. Therefore, the leakage current of the storage capacitor is positively correlated with the rated voltage of the storage capacitor.

[0069] In some embodiments, the capacitance of a storage capacitor with a larger rated voltage is greater than the capacitance of a storage capacitor with a smaller rated voltage. That is, the rated voltage and capacitance of the storage capacitor are positively correlated. The larger the rated voltage of the storage capacitor, the larger its capacitance, and the smaller the rated voltage of the storage capacitor, the smaller its capacitance. It can be understood that the formula for calculating the capacitance of the storage capacitor is as follows: C = V / Q,

[0070] Where C is the capacity of the storage capacitor in Farads (F), Q is the charge on the storage capacitor in Coulombs (C), and V is the voltage of the storage capacitor in volts (V). Correspondingly, the formula for calculating the capacitance, i.e., the charge, of the storage capacitor is as follows: Q = V × C.

[0071] Where Q is the charge on the storage capacitor, i.e., the capacitance, in coulombs (C), V is the voltage across the storage capacitor, in volts (V), and C is the capacitance of the storage capacitor, in farads (F). Therefore, the capacitance of the storage capacitor is positively correlated with the rated voltage of the storage circuit 15.

[0072] It is understandable that the rated voltage and capacitance of the storage capacitor are positively correlated, that is, the leakage current of the storage capacitor is also positively correlated with the capacitance of the storage capacitor.

[0073] In some examples, an electrolytic capacitor may be selected as a storage capacitor with a high rated voltage. Electrolytic capacitors have high rated voltage and large capacity, but also high leakage current. A ceramic capacitor may be selected as a storage capacitor with a low rated voltage. Ceramic capacitors have low rated voltage and small capacity, but also low leakage current. Of course, in other examples, all may be electrolytic capacitors, ceramic capacitors, or other capacitors.

[0074] In some embodiments, please refer to Figure 2, which is a schematic diagram of a second embodiment of a passive device for multi-channel storage provided by an embodiment of the present application. Passive device 10 also includes a processor 14, which is connected to antenna circuit 11 and storage circuit 15. Processor 14 sequentially charges different storage branches 152 in ascending order of rated voltage.

[0075] Because the storage branch 152 with a lower rated voltage has a lower leakage current and less energy loss, the processor 14 controls the antenna circuit 11 to preferentially charge the storage branch 152 with a lower rated voltage. That is, the processor 14 charges the different storage branches 152 in ascending order of rated voltage.

[0076] In some examples, please refer to Figure 3, which is a schematic diagram of a third structure of a passive multi-channel storage device provided in an embodiment of the present application. Multi-channel storage branch 152 includes at least a first storage branch 154 and a second storage branch 156. The rated voltage of first storage branch 154 is lower than the rated voltage of second storage branch 156. Processor 14 controls antenna circuit 11 to charge first storage branch 154 and, after first storage branch 154 is fully charged, to charge second storage branch 156.

[0077] The processor 14 first controls the antenna circuit 11 to charge the first storage branch 154, which has a lower rated voltage. After the first storage branch 154 is fully charged, the processor 14 controls the first storage branch 154 to cooperate with the antenna circuit 11 to charge the second storage branch 156. For example, after the first storage branch 154 has stored sufficient energy, it can charge the second storage branch 156, which has a higher rated voltage. This prevents the energy provided by the antenna circuit 11 from being less than or equal to the leakage current of the second storage branch 156, which would prevent the second storage branch 156 from being unable to store energy. After storing a certain amount of energy, the first storage branch 154 has sufficient energy to charge the second storage branch 156, which has a higher rated voltage. Even if the leakage current is large, the energy can be stored in the second storage branch 156 because the first storage branch 154 can provide a stable and relatively large charging current. The charging current provided by the first storage branch 154 is greater than the leakage current of the second storage branch 156.

[0078] In other examples, please refer to FIG. 4 , which is a schematic diagram of a fourth structure of a passive multi-channel storage device provided in an embodiment of the present application. The multi-channel storage branch 152 may further include a third storage branch 158 , wherein the rated voltage of the third storage branch 158 is greater than the rated voltage of the second storage branch 156 . After the second storage branch 156 is fully charged, it cooperates with the antenna circuit 11 to charge the third storage branch 158 . For example, after the second storage branch 156 has stored sufficient energy, it can charge the third storage branch 158 , which has a higher rated voltage, to prevent the energy provided by the antenna circuit 11 from being less than or equal to the leakage current of the third storage branch 158 , thereby preventing the third storage branch 158 from being able to store energy. After storing a certain amount of electrical energy, the second storage branch 156 can have enough electrical energy to charge the third storage branch 158 with a higher rated voltage. Even if the leakage current of the third storage branch 158 is large, the electrical energy can be stored in the third storage branch 158 because the second storage branch 156 can provide a stable and relatively large charging current. The charging current provided by the second storage branch 156 is greater than the leakage current of the third storage branch 158.

[0079] It is understandable that the multiple storage branches 152 may include more storage branches 152 , and the rated voltages of different storage branches 152 are different and are all greater than the rated voltage of the third storage branch 158 .

[0080] In some examples, the processor 14 may first fully charge the storage branch 152 with the lowest rated voltage among the multiple storage branches 152 , and then charge the storage branches 152 with higher rated voltages step by step in the order of the rated voltages of the multiple storage branches 152 from small to large.

[0081] In some examples, the processor 14 may select a matching storage branch 152 from the multiple storage branches 152 as the storage branch 152 to be charged initially based on the magnitude of the current charging the storage circuit 15. For example, the processor 14 may obtain the input current for charging the storage circuit 15, select a storage branch 152 with a leakage current smaller than the input current and closest to the input current as the storage branch 152 to be charged initially, and then charge storage branches 152 with higher rated voltages in a step-by-step manner.

[0082] In some embodiments, please continue to refer to Figure 1. The processor 14 of the passive device 10 can also be connected to the antenna circuit 11 and the storage circuit 15. The processor 14 obtains the output current of the electric energy output by the antenna circuit 11. The processor 14 selects one or more storage branches 152 from the multiple storage branches 152 according to the output current to connect to the antenna circuit 11 and the load 13.

[0083] The processor 14 can select a suitable storage branch 152 based on the output current output by the antenna circuit 11. For example, the processor 14 obtains the output current output by the antenna circuit 11, and selects a storage branch 152 from multiple storage branches 152 based on the magnitude of the output current to connect to the antenna circuit 11 and the load 13. Exemplarily, the suitable storage branch 152 can be determined based on the leakage current of the storage branch 152 and the output current output by the antenna circuit 11. It can also be understood that the larger the output current, the larger the storage branch 152 with the larger leakage current can be selected, and the corresponding rated voltage is also larger, so that the storage branch 152 with the rated voltage that meets the requirements can be charged faster. For example, the storage branch 152 corresponding to the largest or second largest leakage current among the leakage currents less than the output current can be selected to connect to the antenna circuit 11 and the load 13.

[0084] In other examples, the processor 14 may also select appropriate multiple storage branches 152 based on the output current of the antenna circuit 11. By using multiple storage branches 152 as current storage units, appropriate current storage units can be formed by combining multiple storage branches 152. For example, the processor 14 obtains the output current of the antenna circuit 11 and then selects two or more corresponding storage branches 152 with the largest leakage currents less than the output current to connect to the antenna circuit 11 and the load 13.

[0085] In some embodiments, each storage branch 152 includes a storage capacitor, and each storage branch 152 can be conveniently configured according to the rated voltage of the storage capacitor. The configuration of each storage branch 152 is simple, and the selection and switching of multiple storage branches 152 can be easily controlled.

[0086] In some embodiments, at least one of the multiple storage branches 152 includes multiple parallel storage capacitors. Multiple parallel storage capacitors form a storage branch 152, thereby obtaining a suitable rated voltage and output current. Multiple storage branches 152 can be configured as needed, with multiple parallel storage branches 152 provided in one or more of the storage branches 152.

[0087] In some embodiments, at least one of the multiple storage branches 152 includes multiple storage capacitors connected in series. Multiple storage capacitors connected in series form the storage branch 152, thereby achieving a suitable rated voltage and output current. Multiple storage branches 152 can be configured as needed, with multiple storage branches 152 connected in series in one or more of the multiple storage branches 152.

[0088] In some embodiments, multiple storage branches can be arranged in parallel, and each storage branch is connected to a passive device via a selection switch, that is, the selection switch can be used to control whether the storage branch is turned on. For example, by controlling the conduction of the selection switch, the corresponding storage branch is turned on, that is, the storage branch is powered. For another example, by controlling the disconnection of the selection switch, the corresponding storage branch is disconnected, that is, the storage branch is neither charged nor powered. Therefore, in some examples, by controlling the conduction or disconnection of multiple selection switches, one of the storage branches can be turned on, thereby obtaining a suitable storage capacitor, that is, a storage capacitor with a suitable rated voltage and capacitance. Among them, the storage branch with a smaller rated voltage can be turned on first, and then the storage branch with a larger rated voltage can be turned on in sequence. In some examples, by controlling the conduction or disconnection of multiple selection switches, multiple storage branches can be turned on, thereby obtaining a suitable storage capacitor combination.

[0089] In some embodiments, multiple storage branches can be arranged in series, and the multiple storage branches are arranged in order from small to large rated voltages, and a DCTODC circuit is provided between two adjacent storage branches. The DCTODC circuit is used to increase the voltage so that the storage branch with a smaller rated voltage can charge the storage branch with a larger rated voltage. There is less interference with the front-end circuit (such as the oscillation circuit and the rectifier circuit), and storage capacitors with different withstand voltages of the same medium can be used, such as capacitors with ceramic media or capacitors with electrolyte media. Among them, different storage branches can supply power to other circuits respectively. For example, the storage branch with the highest rated voltage supplies power to the drive circuit, and the storage circuit with a higher rated voltage supplies power to the wireless communication circuit.

[0090] In some embodiments, please refer to Figure 5, which is a schematic diagram of a fifth embodiment of a passive multi-channel storage device provided in embodiments of the present application. Passive device 10 also includes a rectifier circuit 12, which is disposed between antenna circuit 11 and storage circuit 15. The power converted by antenna circuit 11 is unstable, and rectifier circuit 12 rectifies this power to obtain rectified power, which is then supplied to load 13.

[0091] The rectifier circuit 12 may include multiple rectifier branches 122 connected in parallel, with different rectifier branches 122 having different turn-on voltages and / or internal resistances. One of the multiple rectifier branches 122 is selectively connected to the antenna circuit 11 and the storage circuit 15. Selecting an appropriate rectifier branch 122 matches the electrical energy output by the antenna circuit 11, thereby improving energy utilization. For example, when the electrical energy output by the antenna circuit 11 is relatively weak, the rectifier circuit 12 in the related art cannot pass through the rectifier branch 122 and cannot be utilized due to reasons such as a high turn-on voltage. In this embodiment, the rectifier circuit 12 can select a rectifier branch 122 with a lower turn-on voltage to connect to the antenna circuit 11 and the storage circuit 15, thereby allowing the lower energy to be transmitted to the back end for utilization, rather than being unusable. For another example, when the electrical energy output by the antenna circuit 11 is relatively strong, a rectifier branch 122 with a higher turn-on voltage can be selected to connect to the antenna circuit 11 and the storage circuit 15, thereby preventing the rectifier branch 122 with a lower turn-on voltage from being damaged due to excessive energy.

[0092] In some embodiments, the processor 14 of the passive device 10 is connected to the antenna circuit 11 and the rectifier circuit 12, and the conduction voltages of different rectifier branches 122 are different. The processor 14 obtains the first voltage of the electric energy output by the antenna circuit 11, and the processor 14 selects one from the multiple rectifier branches 122 according to the first voltage to connect to the antenna circuit 11 and the storage circuit 15.

[0093] The processor 14 can collect the first voltage at the output end of the antenna circuit 11 and select one from the multiple rectifying branches 122 to connect to the antenna circuit 11 and the storage circuit 15 according to the first voltage.

[0094] Specifically, the processor 14 obtains the on-state voltage of each rectifier branch 122, and determines a target on-state voltage that is less than the first voltage and closest to the first voltage from multiple on-state voltages, determines a target rectifier branch 122 from multiple rectifier branches 122 based on the target on-state voltage, and connects the target rectifier branch 122 to the antenna circuit 11 and the storage circuit 15.

[0095] When the first voltage at the output of antenna circuit 11 is low, that is, when the electrical energy output by antenna circuit 11 is weak, processor 14 can select rectifier branch 122 with a low conduction voltage to connect to antenna circuit 11 and storage circuit 15, thereby allowing even low energy to be transmitted to the back end. When the first voltage at the output of antenna circuit 11 is high, that is, when the electrical energy output by antenna circuit 11 is strong, processor 14 can select rectifier branch 122 with a high conduction voltage to connect to antenna circuit 11 and storage circuit 15, thereby preventing rectifier branch 122 with a low conduction voltage from being damaged by excessive energy.

[0096] For example, the plurality of rectifier branches 122 include a rectifier branch 122 with a turn-on voltage of 0.2 V and a rectifier branch 122 with a turn-on voltage of 0.7 V. When the processor 14 obtains a first voltage value of 1 V, the turn-on voltage that is less than the first voltage and closest to the first voltage is 0.7 V, and 0.7 V is used as the target turn-on voltage, and the rectifier branch 122 with a turn-on voltage of 0.7 V is used as the target rectifier branch 122, and the target rectifier branch 122 is connected to the antenna circuit 11 and the storage circuit 15. When the processor 14 obtains a first voltage value of 0.3 V, the turn-on voltage that is less than the first voltage and closest to the first voltage is 0.2 V, and 0.2 V is used as the target turn-on voltage, and the rectifier branch 122 with a turn-on voltage of 0.2 V is used as the target rectifier branch 122, and the target rectifier branch 122 is connected to the antenna circuit 11 and the storage circuit 15. Energy below the conduction voltage is wasted. Therefore, while a rectifier branch 122 with a conduction voltage of 0.2V can capture lower energy, it is more expensive and has a low withstand voltage, which can easily cause burnout. A rectifier branch 122 with a conduction voltage of 0.7V cannot pass energy below 0.7V, but it is less expensive and can withstand high voltages, making it less likely to burn out.

[0097] It is understandable that the on-state voltages of the plurality of rectifier branches 122 may be set as required, such as 0.2V, 0.5V, and 0.7V, or 0.2V, 0.5V, 0.7V, and 1V.

[0098] In some examples, the multiple rectifier branches 122 include at least a first rectifier branch and a second rectifier branch, and the turn-on voltage of the first rectifier branch is lower than the turn-on voltage of the second rectifier branch. When the first voltage is lower than a first voltage threshold, the processor 14 controls the first rectifier branch to connect to the antenna circuit 11 and the storage circuit 15. When the first voltage is not lower than the first voltage threshold, the processor 14 controls the second rectifier branch to connect to the antenna circuit 11 and the storage circuit 15. Alternatively, the appropriate rectifier branch 122 can be selected by comparing the first voltage with a voltage threshold. The voltage threshold can be the turn-on voltage of one of the rectifier branches 122.

[0099] In some other examples, the multiple rectifier branches 122 include three or more rectifier branches 122 , and the corresponding voltage thresholds are also more. The first voltage is compared with the multiple voltage thresholds, and then the most appropriate rectifier branch 122 is selected.

[0100] The components in the rectifier branch 122 can be arranged as needed. For example, the rectifier branch 122 can include a diode, or the rectifier branch 122 can include multiple diodes, or the rectifier branch 122 can include multiple diodes forming a rectifier bridge.

[0101] Multiple rectifier branches 122 can be selectively connected to the antenna circuit 11 and storage circuit 15 via a switch assembly. The switch assembly can be an electronically controlled switch assembly controlled by the processor 14. In other examples, the switch assembly can also be a manually operated switch assembly. For example, relevant information can be displayed to the user, such as displaying different lights or sending relevant information to a mobile phone or other device, to encourage the user to manually operate the switch assembly.

[0102] In some embodiments, the processor 14 of the passive device 10 is connected to the antenna circuit 11 and the rectifier circuit 12. The internal resistance of different rectifier branches 122 in the rectifier circuit 12 is different. The processor 14 obtains the first duration of the antenna circuit 11 outputting electrical energy. The processor 14 selects one from the multiple rectifier branches 122 to connect to the antenna circuit 11 and the storage circuit 15 based on the first duration.

[0103] The processor 14 can collect the first duration of the antenna circuit 11 outputting electrical energy, and select one from the multiple rectifier branches 122 to connect to the antenna circuit 11 and the storage circuit 15 based on the first duration. In other words, rectifier branches 122 with different internal resistances can be selected based on the time when the antenna circuit 11 transmits electrical energy. For example, in the front stage of the antenna circuit 11 transmitting electrical energy, a rectifier branch 122 with a larger internal resistance is selected. The higher the safety of the rectifier branch 122, the larger the internal resistance, the slower the back end is charged. In the back stage of the antenna circuit 11 transmitting electrical energy, a rectifier branch 122 with a smaller internal resistance is selected. The smaller the internal resistance, the slower the back end is charged, and the back end can be fully charged faster.

[0104] It should be noted that, the greater the internal resistance of the rectifier branch 122 , the greater the energy it consumes, the higher the voltage it can withstand, and the higher the stability.

[0105] In some examples, the multi-channel rectifier branch 122 includes at least a first rectifier branch and a second rectifier branch, and the internal resistance of the first rectifier branch is greater than the conduction voltage of the second rectifier branch. When the first duration is less than a first duration threshold, the processor 14 controls the first rectifier branch to communicate with the antenna circuit 11 and the storage circuit 15. When the first duration is not less than the first duration threshold, the processor 14 controls the second rectifier branch to communicate with the antenna circuit 11 and the storage circuit 15. The appropriate rectifier branch 122 is selected based on the duration for which the antenna circuit 11 provides power. The first duration threshold can be set as needed. For example, the first duration threshold can be a preset time, such as 1 minute, 3 minutes, or 5 minutes. For another example, the first duration threshold can be set based on other operational settings, such as the duration of data transmission. The passive device 10 also needs to communicate data with an external device. When the frequencies of energy transmission and data communication are close, they will interfere with each other. The energy intensity of the RF signal used for energy transmission is much greater than the RF signal used for data transmission. The RF signal used for data transmission is easily interfered with, resulting in data transmission failure. In the initial stage, the rectifier branch 122 with a larger internal resistance is selected to reduce interference with the radio frequency signal of data transmission.

[0106] In other examples, the multiple rectifier branches 122 may include three or more rectifier branches 122, and the processor 14 selects an appropriate rectifier branch 122 based on the first duration. For example, as the antenna circuit 11 outputs power for a longer period of time, a rectifier branch 122 with a smaller internal resistance is selected, thereby increasing the power supplied to or charged by the backend, gradually improving the rectified power, and enabling the passive device 10 to start and operate stably.

[0107] In some embodiments, the processor 14 of the passive device 10 may also be connected to the storage circuit 15 and the rectifier circuit 12. Different rectifier branches 122 have different internal resistances. The processor 14 obtains the second voltage of the storage circuit 15 and selects one from the multiple rectifier branches 122 based on the second voltage to connect to the antenna circuit 11 and the storage circuit 15. The storage circuit 15 may include one or more storage capacitors.

[0108] The appropriate rectifier branch 122 can be selected by the second voltage of the storage circuit 15. For example, when the second voltage of the storage circuit 15 reaches a certain value, it means that the storage circuit 15 has stored a certain value of energy, such as 30%, and the rectifier branch 122 with a smaller internal resistance is switched.

[0109] In some examples, the multi-channel rectifier branch 122 includes at least a first rectifier branch and a second rectifier branch, and the internal resistance of the first rectifier branch is greater than the conduction voltage of the second rectifier branch. When the second voltage is lower than the second voltage threshold, the processor 14 controls the first rectifier branch to connect to the antenna circuit 11 and the storage circuit 15; when the second voltage is not lower than the second voltage threshold, the processor 14 controls the second rectifier branch to connect to the antenna circuit 11 and the storage circuit 15. When the charge level of the storage circuit 15 is low, the rectifier branch 122 with a larger internal resistance is selected. After the charge level of the storage circuit 15 reaches a certain proportion, the rectifier branch 122 with a smaller internal resistance is selected to speed up the charging of the storage circuit 15.

[0110] In other examples, the multiple rectifier branches 122 may include three or more rectifier branches 122, and the processor 14 selects an appropriate rectifier branch 122 based on the second voltage of the storage circuit 15. For example, as the second voltage of the storage circuit 15 of the antenna circuit 11 increases, rectifier branches 122 with increasingly smaller internal resistances are selected, thereby increasing the amount of power supplied to the storage circuit 15 and accelerating the time it takes to fully charge the storage circuit 15.

[0111] In some embodiments, rectifier branches 122 with different conduction frequencies can be selected as needed. For example, antenna circuit 11 includes an NFC antenna circuit and a Bluetooth antenna circuit. When the NFC antenna circuit outputs power, rectifier branch 122 with a lower conduction frequency is selected. When the Bluetooth antenna circuit outputs power, rectifier branch 122 with a higher conduction frequency is selected, thereby meeting the needs of different antenna circuits 11. In other embodiments, antenna circuit 11 may include only an NFC antenna circuit or only a Bluetooth antenna circuit. The NFC antenna circuit uses NFC technology to collect NFC radio frequency energy from the environment, while the Bluetooth antenna circuit uses Bluetooth technology to collect Bluetooth radio frequency energy from the environment.

[0112] It is understood that the processor 14 may also select one of the multiple rectifier branches 122 to be connected to the antenna circuit 11 and the storage circuit 15 based on at least two of the first voltage at the output end of the antenna circuit 11, the first duration of the antenna circuit 11 outputting electrical energy, and the second voltage of the storage circuit 15. For example, at least two rectifier branches 122 may be first determined based on the first voltage, and then a final rectifier branch 122 may be determined from the at least two rectifier branches 122 based on the first duration or the second voltage. For another example, at least two rectifier branches 122 may be first determined based on the first duration, and then a final rectifier branch 122 may be determined from the at least two rectifier branches 122 based on the first voltage or the second voltage. For another example, at least two rectifier branches 122 may be first determined based on the second voltage, and then a final rectifier branch 122 may be determined from the at least two rectifier branches 122 based on the first voltage or the first duration.

[0113] In some embodiments, please refer to Figure 6, which is a schematic diagram of a sixth embodiment of a multi-channel storage passive device provided in embodiments of the present application. Load 13 includes a driver circuit 131. Processor 14 obtains an energy value stored in storage circuit 15. When the energy value exceeds an energy threshold, processor 14 controls driver circuit 131 to obtain a portion of the electrical energy in storage circuit 15 for operation.

[0114] The processor 14 can output a pulse modulation control signal (PWM signal) to the driving circuit 131 to enable the driving circuit 131 to operate. The driving circuit 131 will not consume all the power stored in the storage circuit 15. After the driving circuit 131 completes its operation, the storage circuit 15 still has some power left. The storage circuit 15 can also power the processor 14 and other devices, so that the passive device 10 does not suddenly fall into a power-off state, causing the entire passive circuit to suddenly lose power and become out of control. The remaining power of the storage circuit 15 can also support the processor 14 and other devices to perform other tasks, such as storing information after the driving circuit 131 completes its operation, storing the current state of the driving circuit 131, controlling the driving circuit 131 to sleep, etc., so as to keep the current state of the driving circuit 131 clear, thereby facilitating subsequent control of the driving circuit 131 and solving problems such as information loss or loss of state of the driving circuit 131.

[0115] In some embodiments, the processor 14 monitors the electrical energy stored in the storage circuit 15. When the stored electrical energy exceeds a storage threshold, the processor 14 outputs a pulse modulation control signal to the drive circuit 131, so that the drive circuit 131 obtains part of the electrical energy from the storage circuit 15. The storage threshold can be the sum of the electrical energy required for the drive circuit 131 to operate plus a preset reserved electrical energy. After the processor 14 detects that the electrical energy stored in the storage circuit 15 exceeds the storage threshold, the processor 14 can output a pulse modulation control signal to the drive circuit 131. The drive circuit 131 operates for a period of time according to the pulse modulation control signal. During this period, the storage circuit 15 provides electrical energy to the drive circuit 131, so that the drive circuit 131 completes its work, such as driving the motor 131 to rotate a certain angle. It should be noted that the storage circuit 15 still retains some electrical energy to power other circuits. For example, it powers the processor 14 and the wireless communication circuit.

[0116] In some embodiments, the passive device 10 may further include a temperature sensor for acquiring temperature information. The processor 14 is connected to the temperature sensor and adjusts the duty cycle of the pulse modulation control signal (PWM signal) according to the temperature information, wherein the duty cycle is inversely correlated with the temperature information.

[0117] The storage circuit 15 can also power the temperature sensor to obtain the temperature information of the environment where the passive device 10 is located. The processor 14 can adjust the duty cycle of the pulse modulation control signal according to the temperature information of the environment where the passive driving circuit 131 is located, thereby obtaining a better driving effect.

[0118] In some examples, the drive circuit 131 is used to drive the motor to rotate, and the motor has different resistances at different ambient temperatures, or in other words, at different ambient temperatures, the drive circuit 131 drives the motor for the same length of time, and the rotation angle of the motor is different. The processor 14 can adjust the duty cycle of the pulse modulation control signal according to different temperature information in different environments, so as to better control the driving effect. For example, at normal temperature, the duty cycle of the pulse modulation control signal output by the processor 14 is a first duty cycle, and at low temperature, the duty cycle of the pulse modulation control signal output by the processor 14 is a second duty cycle, and the second duty cycle is greater than the first duty cycle, that is, at a lower temperature, the drive circuit 131 obtains a longer period of power supply and drives the motor to rotate for a longer period of time, so that the motor reaches the same or similar rotation angle as at normal temperature.

[0119] In some examples, the corresponding information of different temperatures and different duty cycles of pulse modulation control signals can be stored in the processor 14 or memory in advance. The processor 14 only needs to obtain the temperature information of the current environment through the temperature sensor, and then obtain the corresponding duty cycle of the pulse modulation control signal based on the temperature information, and then control the driving circuit 131 according to the duty cycle of the pulse modulation control signal, so that the driving circuit 131 can complete the driving well under different ambient temperatures.

[0120] In some embodiments, please refer to FIG7 , which is a seventh structural diagram of a passive device for multi-channel storage provided in an embodiment of the present application. The antenna circuit 11 includes an antenna 112 and an oscillator circuit 114. The parameters of the oscillator circuit 114 are adjustable to change the oscillation frequency of the antenna 112. The electric energy output by the antenna circuit 11 after the change is greater than the electric energy output by the antenna circuit 11 before the change. It can be understood that the smaller the difference between the oscillation frequency of the antenna 112 and the frequency of the radio frequency signal in the environment, the higher the receiving efficiency of the antenna 112, that is, the higher the electric energy obtained by the antenna circuit 11. The antenna circuit 11 can change the oscillation frequency of the oscillator circuit, so that the electric energy output by the antenna circuit 11 after the change is greater than the electric energy output by the antenna circuit 11 before the change.

[0121] In some embodiments, the antenna circuit 11 includes an NFC antenna circuit, which includes an NFC receiving antenna and an oscillator circuit 114. The NFC receiving antenna couples with the NFC transmitting antenna of the external device to transfer energy. Because the receiving efficiency is highest when the transmitting end and the receiving end are at the same frequency, the oscillator circuit 114 cooperates with the NFC receiving antenna to adjust the frequency of the NFC receiving antenna so that it is at the same frequency or close to the frequency of the NFC transmitting antenna of the external device. For example, the frequency of the NFC transmitting antenna is 13.05 MHz, and the initial frequency of the NFC receiving antenna is 13 MHz. By adjusting the parameters of the oscillator circuit 114, the frequency of the NFC receiving antenna that cooperates with it is adjusted from 13 MHz to 13.05 MHz, so that it is at the same frequency or close to the frequency of the NFC transmitting antenna.

[0122] In some embodiments, antenna circuit 11 includes a Bluetooth antenna circuit, which includes a Bluetooth receiving antenna and an oscillator circuit 114. The Bluetooth receiving antenna resonates with the external device's Bluetooth transmitting antenna to transmit energy. Reception efficiency is highest when the transmitting and receiving ends are at the same frequency. Oscillator circuit 114, in conjunction with the Bluetooth receiving antenna, can adjust the Bluetooth receiving antenna's frequency to be at or close to the external device's Bluetooth transmitting antenna's frequency.

[0123] It should be noted that in this embodiment, the primary purpose of the antenna circuit 11 is to convert received RF signals into electrical energy, not data communication. Therefore, the parameters of the oscillation circuit 114 are adjusted to ensure that the oscillation frequency of the antenna 112 is the same as or close to the frequency of the carrier signal of the RF signal, rather than the same as or close to the frequency of the data signal in the RF signal.

[0124] In some embodiments, since the receiving efficiency is highest when the transmitting end and the receiving end are at the same frequency, the changed oscillation frequency is the same as or close to the frequency of the carrier of the radio frequency signal, thereby maximizing the receiving efficiency of the antenna circuit 11.

[0125] In some embodiments, the parameters of oscillator circuit 114 are adjustable to cause the oscillation frequency of antenna 112 to vary in a predetermined direction within a predetermined frequency range. For example, the parameters of oscillator circuit 114 can be adjusted to cause antenna 112 to sweep the frequency in an ascending or descending order within a predetermined frequency range. For example, using antenna 112 as an NFC receiving antenna, the parameters of oscillator circuit 114 can be adjusted to cause the NFC receiving antenna to sweep the frequency in an ascending or descending order within a predetermined frequency range of 13 MHz to 14 MHz.

[0126] It is understood that the oscillation circuit 114 can adjust the oscillation frequency of the antenna 112 by a predetermined amplitude. For example, the oscillation frequency of the antenna 112 can be adjusted by a corresponding variation in the parameters of the oscillation circuit 114, or the parameters of the oscillation circuit 114 can be adjusted by a corresponding variation in the oscillation frequency of the antenna 112.

[0127] The processor 14 of the passive device 10 can also monitor the power output by the antenna circuit 11 and determine the target oscillation frequency and target parameters corresponding to the maximum power, so that the parameters of the oscillation circuit 114 are adjusted to the target parameters and the oscillation frequency of the antenna 112 is the target oscillation frequency.

[0128] During the frequency sweeping process of the antenna 112, the processor 14 can monitor the electrical energy output by the antenna circuit 11 in real time and use the frequency corresponding to the maximum output electrical energy as the target oscillation frequency, that is, an oscillation frequency that is the same frequency or close to the frequency of the antenna of the external device, so that the antenna circuit 11 can oscillate at the target oscillation frequency in subsequent cooperation with the external device, thereby achieving higher energy reception efficiency. When the processor 14 obtains the target oscillation frequency, it uses the parameters of the oscillation circuit 114 corresponding to the target oscillation frequency as the target parameters and stores the target parameters in the passive device 10 so that the parameters of the oscillation circuit 114 can be subsequently adjusted to the target parameters. The oscillation frequency of the oscillating electrical energy is the target oscillation frequency.

[0129] For example, the analog-to-digital conversion (AD) pin of processor 14 can be connected to the output of antenna circuit 11 to perform analog-to-digital conversion on the power output of antenna circuit 11. The power is then compared within processor 14 to determine the maximum power and obtain the target oscillation frequency and target parameters corresponding to the maximum power. After obtaining the target parameters, processor 14 can control the parameters of oscillation circuit 114 to adjust to the target parameters, thereby oscillating the antenna 112 at the target oscillation frequency and maximizing the power output of antenna circuit 11.

[0130] The processor 14 can control the antenna 112 to perform frequency sweeping. Specifically, the processor 14 adjusts the parameters of the oscillator circuit 114 in the antenna circuit 11 so that the oscillation frequency of the antenna 112 varies in a preset direction within a preset frequency range, while simultaneously monitoring the power output by the antenna circuit 11. The oscillation frequency of the antenna 112 can be obtained from the parameters of the oscillator circuit 114. For example, the oscillation frequency can be obtained by mapping the parameters to the oscillation frequency, or the oscillation frequency can be calculated from the parameters.

[0131] In some embodiments, the oscillation circuit 114 includes a variable element, and at least one of the impedance, capacitance, and inductance of the variable element is variable. By adjusting at least one of the impedance, capacitance, and inductance of the variable element in the oscillation circuit 114, the oscillation frequency of the antenna 112 connected to the oscillation circuit 114 can be adjusted.

[0132] Exemplarily, the variable element includes at least one of an adjustable resistor, an adjustable capacitor, and an adjustable inductor. The adjustable resistor and the adjustable capacitor may be integrated, such as within a corresponding chip, to reduce the physical size of the oscillator circuit 114.

[0133] In some examples, processor 14 can monitor the rectified power. The rectified circuit is more stable, and the monitoring circuit can monitor the rectified circuit more conveniently and stably. In some examples, processor 14 can also monitor the power before rectification.

[0134] In some embodiments, the passive device 10 may be a passive lock, and the load 13 may include a motor drive circuit 131 that drives the motor in the passive lock, thereby unlocking or locking the lock. For example, the motor drive circuit 131 can drive the motor to rotate. When the motor rotates forward, the passive lock is unlocked and the passive lock can be unlocked; when the motor rotates backward, the passive lock is locked, and the passive lock cannot be unlocked. The relevant structure of the passive lock can be set as needed and will not be described here. In some other embodiments, the passive device 10 can also be a passive tag, a passive display device, a passive monitoring device, etc., and the corresponding load 13 includes a tag circuit, a display circuit or a monitoring circuit, etc. Among them, the display circuit can include a low-power display circuit such as an ink screen circuit and an electrochromic display circuit, and the monitoring circuit can include a low-power monitoring circuit such as a temperature monitoring circuit and a humidity monitoring circuit.

[0135] In some embodiments, the load 13 may also include a wireless communication circuit, through which the processor 14 conducts wireless data communication with external devices, such as receiving external commands to control the unlocking or locking of the passive lock, and transmitting data stored within the passive lock, such as the unlocking time, unlocking success information, and the identity of the external device that unlocked the lock. In some examples, the wireless communication circuit may reuse portions of the antenna circuit 11, such as the antenna. In some examples, the antenna circuit 11 is used only for energy transmission, and the wireless communication circuit includes a separate set of wireless communication antenna circuits 11 for transmitting data signals.

[0136] An embodiment of the present application provides a control method for a passive device. Please refer to Figure 8, which is a flow chart of the control method for a passive device provided by an embodiment of the present application. The passive device in this embodiment can refer to the passive device in any of the above embodiments, and the structure and function of the passive device will not be repeated here. For example, the passive device includes an antenna circuit, a storage circuit and a load, the antenna circuit is used to receive micro-energy in the environment and convert it into electrical energy, the storage circuit is connected to the antenna circuit, and is used to store electrical energy, the storage circuit includes multiple storage branches, each storage branch includes at least one storage capacitor, different storage branches have different rated voltages, and the load is connected to the storage circuit; the method includes:

[0137] 301. Obtain the rated voltage of each storage branch.

[0138] 302 , selecting one or more storage branches from the plurality of storage branches to connect to the antenna circuit and the load according to the rated voltage of each storage branch.

[0139] Storage branches with different rated voltages can provide different driving voltages, and thus can provide different voltages to different loads. For example, a lower voltage can be provided to a low-power load, while a higher voltage can be provided to a high-power load. It is understood that the rated voltage of the storage branch is positively correlated with the driving voltage provided. When the storage branch is fully charged, the driving voltage provided by the storage branch can be equal to the rated voltage of the storage branch.

[0140] A storage branch with a lower rated voltage can provide a lower drive voltage to low-power loads such as wireless communication circuits, while a storage branch with a higher rated voltage can provide a higher drive voltage to high-power loads such as drive circuits. For example, if the passive device is a passive lock, which includes a drive circuit that drives a motor and a wireless communication circuit, the storage branch with a lower rated voltage can power the wireless communication circuit for wireless communication with external devices. The storage branch with a higher rated voltage can power the drive circuit, which then drives the motor.

[0141] If wireless communication is required, the storage branch with a lower rated voltage can be connected to the antenna circuit and the wireless communication circuit of the load, so that the storage branch can be fully charged more quickly and the wireless communication circuit can be powered more quickly.

[0142] If motor driving is required, the storage branch with a higher rated voltage can be connected to the antenna circuit and the wireless communication circuit of the load to obtain a larger driving voltage, so that there is a high enough voltage to drive the circuit to work.

[0143] Among any two storage branches, the leakage current of the storage branch with a higher rated voltage is greater than the leakage current of the storage branch with a lower rated voltage. That is, the rated voltage and leakage current of the storage branch are positively correlated: the higher the rated voltage, the greater the leakage current, and the lower the rated voltage, the lower the leakage current.

[0144] In some embodiments, selecting one or more storage branches from a plurality of storage branches to connect to the antenna circuit and the load based on the rated voltage of each storage branch includes:

[0145] Obtaining the charging status of each storage branch;

[0146] If no storage branch is in a charging state, a storage branch with a minimum rated voltage is determined from the multiple storage branches as a target storage branch, and the target storage branch is charged;

[0147] If any storage branch is in a charging state, determining a storage branch with a minimum rated voltage from multiple storage branches that are not in a charging state as a target storage branch;

[0148] After the storage branch currently in the charging state is fully charged, the target storage branch is charged.

[0149] Because the storage branch with a lower rated voltage has a lower leakage current, the energy lost is also less. Therefore, the control antenna circuit prioritizes charging the storage branch with a lower rated voltage, that is, charging the different storage branches in order of rated voltage from small to large. Specifically, if the storage circuit is not charging, the storage branch with the lowest rated voltage among the multiple storage branches can be charged first as the target storage branch, and after it is fully charged, the storage branches with higher rated voltages can be charged step by step in the order of the rated voltages of the multiple storage branches from small to large. If the storage circuit has already started charging, the storage branch with the lowest rated voltage is determined as the target storage branch from the multiple storage branches that are not in a charging state. After the storage branch currently in a charging state is fully charged, the target storage branch is charged, and then the storage branches with higher rated voltages are charged step by step in the order of the rated voltages of the multiple storage branches from small to large.

[0150] Exemplarily, the antenna circuit is first controlled to charge the storage branch with a lower rated voltage. After the storage branch with a lower rated voltage is fully charged, the storage branch with a lower rated voltage is then controlled to cooperate with the antenna circuit to charge the storage branch with a higher rated voltage. For example, the multiple storage branches include at least a first storage branch and a second storage branch, and the rated voltage of the first storage branch is lower than the rated voltage of the second storage branch. The control method further includes: controlling the antenna circuit to charge the first storage branch; and after the first storage branch is fully charged, controlling the first storage branch to charge the second storage branch. The first storage branch is charged first. After the first storage branch has stored sufficient energy, it can charge the second storage branch with a higher rated voltage. This prevents the energy provided by the antenna circuit from being less than or equal to the leakage current of the second storage branch, thereby preventing the second storage branch from being unable to store energy. After the first storage branch has stored a certain amount of energy, it has sufficient energy to charge the second storage branch with a higher rated voltage. Even if the leakage current is large, energy can be stored in the second storage branch because the first storage branch can provide a stable and relatively large charging current. The charging current provided by the first storage branch is greater than the leakage current of the second storage branch. In this manner, the storage branches with higher rated voltages are charged step by step until the storage branch with the highest rated voltage or that meets the demand is charged with sufficient electricity.

[0151] Alternatively, a matching storage branch can be selected from multiple storage branches based on the current used to charge the storage circuit as the first storage branch to be charged. For example, the input current used to charge the storage circuit is obtained, and the storage branch with a leakage current smaller than the input current and closest to the input current is selected as the first storage branch to be charged. Storage branches with higher rated voltages are then charged in a step-by-step manner.

[0152] In some embodiments, the multiple storage branches include at least a first storage branch and a second storage branch, and the rated voltage of the first storage branch is lower than the rated voltage of the second storage branch; the control method further includes:

[0153] obtaining a first voltage of electric energy output by the antenna circuit;

[0154] One of the multiple rectifying branches is selected to be connected to the antenna circuit and the load according to the first voltage.

[0155] The antenna circuit converts micro-energy in the environment into electrical energy, eliminating the need for batteries in passive devices. The electrical energy converted by the antenna circuit is unstable, and the rectifier circuit rectifies the electrical energy to obtain rectified electrical energy, so that the electrical energy supplied to the load is rectified electrical energy. The rectifier circuit includes multiple rectifier branches, each with a different conduction voltage and / or internal resistance. The multiple rectifier branches can be selected as needed to connect to the antenna circuit and the load, thereby selecting the appropriate rectifier branch to match the electrical energy output by the antenna circuit and improve energy utilization. For example, when the electrical energy output by the antenna circuit is weak, a rectifier branch with a lower conduction voltage can be selected to connect to the antenna circuit and the load, allowing the smaller energy to be transmitted to the back end for utilization. For another example, when the electrical energy output by the antenna circuit is strong, a rectifier branch with a higher conduction voltage can be selected to connect to the antenna circuit and the load, thereby preventing the rectifier branch with a lower conduction voltage from being damaged due to excessive energy.

[0156] In some embodiments, selecting one of the plurality of rectifier branches to connect to the antenna circuit and the load according to the first voltage includes:

[0157] Obtaining a turn-on voltage of each rectifier branch, and determining a target turn-on voltage that is smaller than the first voltage and closest to the first voltage from the multiple turn-on voltages;

[0158] A target rectifying branch is determined from a plurality of rectifying branches according to a target conduction voltage, and the target rectifying branch is connected to an antenna circuit and a load.

[0159] When the first voltage at the antenna circuit output terminal is low, that is, when the power output of the antenna circuit is weak, the processor can select a rectifier branch with a low conduction voltage to connect to the antenna circuit and the load, thereby allowing even a small amount of energy to be transmitted to the back end. When the first voltage at the antenna circuit output terminal is high, that is, when the power output of the antenna circuit is strong, the processor can select a rectifier branch with a high conduction voltage to connect to the antenna circuit and the load, thereby preventing the rectifier branch with a low conduction voltage from being damaged by excessive energy.

[0160] For example, the on-state voltages of the plurality of rectifier branches include 0.2V and 0.7V. When the acquired first voltage value is 1V, the on-state voltage that is smaller than the first voltage and closest to the first voltage is 0.7V, then 0.7V is used as the target on-state voltage, and the rectifier branch with the on-state voltage of 0.7V is used as the target rectifier branch, and the target rectifier branch is connected to the antenna circuit and the load. When the acquired first voltage value is 0.3V, the on-state voltage that is smaller than the first voltage and closest to the first voltage is 0.2V, then 0.2V is used as the target on-state voltage, and the rectifier branch with the on-state voltage of 0.2V is used as the target rectifier branch, and the target rectifier branch is connected to the antenna circuit and the load.

[0161] It is understandable that the on-state voltages of the plurality of rectifier branches may be set as required, such as including 0.2V, 0.5V and 0.7V, or including 0.2V, 0.5V, 0.7V and 1V, etc.

[0162] In some embodiments, different rectifier branches have different internal resistances, and the passive device further includes a storage circuit connected between the rectifier circuit and the load to store the electrical energy rectified by the rectifier circuit. Selecting one of the multiple rectifier branches to connect to the antenna circuit and the load based on the first voltage includes:

[0163] obtaining a second voltage of the storage circuit;

[0164] One of the multiple rectifying branches is selected to be connected to the antenna circuit and the load according to the first voltage and the second voltage.

[0165] A suitable rectifier branch can be selected based on the first voltage and the second voltage of the storage circuit. For example, the first voltage determines at least two rectifier branches, and then a final rectifier branch is determined from the at least two rectifier branches based on the second voltage.

[0166] In some examples, selecting one of the plurality of rectifier branches to connect to the antenna circuit and the load according to the first voltage and the second voltage includes:

[0167] Determining a first rectifier branch and a second rectifier branch based on the first voltage, wherein the internal resistance of the first rectifier branch is greater than the conduction voltage of the second rectifier branch;

[0168] When the second voltage is lower than the second voltage threshold, controlling the first rectifying branch to be connected to the antenna circuit and the load;

[0169] When the second voltage is not lower than the second voltage threshold, the second rectifying branch is controlled to be connected to the antenna circuit and the load.

[0170] When the amount of electricity in the storage circuit is low, the rectifier branch with a larger internal resistance is selected. After the amount of electricity in the storage circuit reaches a certain proportion, the rectifier branch with a smaller internal resistance is selected to speed up the charging of the storage circuit. The second voltage threshold can be set as needed.

[0171] In other examples, the multiple rectifier branches may include three or more rectifier branches, and appropriate rectifier branches may be selected based on the second voltage of the storage circuit. For example, as the second voltage of the antenna circuit storage circuit increases, rectifier branches with decreasing internal resistance may be selected, thereby increasing the amount of power supplied to the storage circuit and accelerating the time it takes to fully charge the storage circuit.

[0172] In some embodiments, the passive circuit further includes a rectifier circuit, the rectifier circuit being connected between the antenna circuit and the storage circuit, the rectifier circuit being used to rectify the electrical energy output by the antenna circuit, the rectifier circuit including multiple rectifier branches connected in parallel, different rectifier branches having different internal resistances, and the load being connected to the rectifier circuit; the control method further includes:

[0173] Obtaining a first duration of time during which the antenna circuit outputs electrical energy;

[0174] One of the multiple rectifying branches is selected according to the first time length to be connected to the antenna circuit and the load.

[0175] The first duration of the antenna circuit outputting electrical energy can be collected, and one of the multiple rectifier branches can be selected to connect to the antenna circuit and the load based on the first duration. In other words, rectifier branches with different internal resistances can be selected based on the time the antenna circuit transmits electrical energy. For example, in the early stage of the antenna circuit transmitting electrical energy, a rectifier branch with a larger internal resistance is selected. The higher the safety of the rectifier branch, the larger the internal resistance, the slower the back end is charged. In the later stage of the antenna circuit transmitting electrical energy, a rectifier branch with a smaller internal resistance is selected. The smaller the internal resistance, the slower the back end is charged, and the back end can be fully charged faster.

[0176] It should be noted that the greater the internal resistance of the rectifier branch, the greater the energy it consumes, the higher the voltage it can withstand, and the higher the stability.

[0177] In some examples, the multiple rectifier branches include at least a first rectifier branch and a second rectifier branch, and the internal resistance of the first rectifier branch is greater than the conduction voltage of the second rectifier branch. Selecting one of the multiple rectifier branches to connect to the antenna circuit and the load based on the first duration includes:

[0178] When the first duration is lower than a first duration threshold, controlling the first rectifying branch to be connected to the antenna circuit and the load;

[0179] When the first duration is not less than a first duration threshold, the second rectifying branch is controlled to be connected to the antenna circuit and the load.

[0180] By adjusting the duration for which the antenna circuit provides electrical energy, a suitable rectifier branch is selected. The first duration threshold can be set as needed. For example, the first duration threshold can be a preset time, such as 1 minute, 3 minutes, or 5 minutes. For another example, the first duration threshold can be set according to other work, such as the duration for transmitting data. The passive device also needs to communicate data with an external device. When the frequencies of energy transmission and data communication are close, they will interfere with each other. The energy intensity of the radio frequency signal for transmitting energy is much greater than that of the radio frequency signal for data transmission. The radio frequency signal for data transmission is easily interfered with, resulting in data transmission failure. In the initial stage, a rectifier branch with a larger internal resistance is selected to reduce interference with the radio frequency signal for data transmission.

[0181] In other examples, the multiple rectifier branches may include three or more rectifier branches, and an appropriate rectifier branch may be selected based on the first duration. For example, as the antenna circuit outputs power for a longer period of time, a rectifier branch with a decreasing internal resistance may be selected, thereby increasing the power available for powering or charging the backend, gradually improving the rectified power, and enabling stable startup and operation of the passive device.

[0182] In some embodiments, the passive device further includes a storage circuit connected between the rectifier circuit and the load and storing the electrical energy rectified by the rectifier circuit. Selecting one of the multiple rectifier branches to connect to the antenna circuit and the load according to the first voltage includes:

[0183] obtaining a second voltage of the storage circuit;

[0184] According to the first duration and the second voltage, one of the multiple rectifying branches is selected to be connected to the antenna circuit and the load.

[0185] A suitable rectifier branch can be selected based on the first duration and the second voltage of the storage circuit. For example, at least two rectifier branches are determined based on the first duration, and a final rectifier branch is determined from the at least two rectifier branches based on the second voltage.

[0186] It should be noted that the control method for a passive device provided in the embodiments of the present application is based on the same concept as the passive device in the above embodiments. In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a particular embodiment, please refer to the relevant descriptions of other embodiments. The embodiments of the present application and related technical features can be combined and replaced with each other without conflict.

[0187] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0188] The present application also provides a storage medium storing a computer program. When the computer program is executed on a computer, the computer executes the method of any of the above embodiments, such as obtaining the rated voltage of each storage branch; and selecting one or more storage branches from a plurality of storage branches to connect to the antenna circuit and the load based on the rated voltage of each storage branch. The storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

[0189] The above is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application has been disclosed as above with preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present application. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A passive device with multi-channel storage, wherein, Comprising: An antenna circuit for receiving micro energy in the environment and converting it into electrical energy; A storage circuit connected to the antenna circuit for storing the electrical energy; A load connected to the storage circuit, and the storage circuit supplies power to the load; Wherein, the storage circuit includes multiple storage branches, each storage branch includes at least one storage capacitor, the rated voltages of different storage branches are different, and one or more of the multiple storage branches are connected to the antenna circuit and the load.

2. The passive device with multi-channel storage according to claim 1, wherein, The passive device further includes: A processor connected to the antenna circuit and the storage circuit, and the processor charges different storage branches in ascending order of rated voltage.

3. The passive device with multiple-channel storage according to claim 2, wherein, The multiple storage branches at least include a first storage branch and a second storage branch, the rated voltage of the first storage branch is less than that of the second storage branch, the processor controls the antenna circuit to charge the first storage branch, and after the first storage branch is fully charged, it charges the second storage branch.

4. The passive device with multiple-path storage according to claim 1, wherein, The passive device further includes: A processor connected to the antenna circuit and the storage circuit, the processor obtains the output current of the electrical energy output by the antenna circuit, and the processor selects one or more of the multiple storage branches to be connected to the antenna circuit and the load according to the output current.

5. The passive device with multiple-channel storage according to claim 1, wherein, Among any two of the storage branches, the leakage current of the storage branch with a larger rated voltage is greater than that of the storage branch with a smaller rated voltage, and / or, the capacitance of the storage branch with a larger rated voltage is greater than that of the storage branch with a smaller rated voltage.

6. The passive device with multiple-channel storage according to claim 1, wherein, Each storage branch includes one storage capacitor; or At least one of the multiple storage branches includes multiple storage capacitors connected in parallel or in series.

7. The passive device with multiple-channel storage according to claim 1, wherein, The passive device further includes: A rectifier circuit provided between the antenna circuit and the storage circuit, the rectifier circuit includes multiple rectifier branches connected in parallel, the conduction voltages and / or internal resistances of different rectifier branches are different, and one of the multiple rectifier branches is selectively connected to the antenna circuit and the load.

8. The passive device with multiple-channel storage according to claim 7, wherein, The passive device further includes: A processor connected to the antenna circuit and the rectifier circuit, the conduction voltages of different rectifier branches are different, the processor obtains the first voltage of the electrical energy output by the antenna circuit, and the processor selects one of the multiple rectifier branches to be connected to the antenna circuit and the load according to the first voltage.

9. The passive device with multiple-path storage according to claim 8, wherein, The processor obtains the conduction voltage of each rectifier branch, determines the target conduction voltage that is less than and closest to the first voltage from the multiple conduction voltages, determines the target rectifier branch from the multiple rectifier branches according to the target conduction voltage, and connects the target rectifier branch to the antenna circuit and the load.

10. The passive device with multiple-path storage according to claim 7, wherein, The passive device further includes: A processor, connected to the antenna circuit and the rectification circuit, with different internal resistances for different rectification branches. The processor obtains the first duration of the electrical energy output by the antenna circuit, and the processor selects one of the multiple rectification branches to connect the antenna circuit and the load according to the first duration.

11. The passive device with multiple-path storage according to claim 10, wherein, The multiple rectification branches at least include a first rectification branch and a second rectification branch, and the internal resistance of the first rectification branch is greater than the conduction voltage of the second rectification branch; When the first duration is lower than the first duration threshold, the processor controls the first rectification branch to connect the antenna circuit and the load; When the first duration is not lower than the first duration threshold, the processor controls the second rectification branch to connect the antenna circuit and the load.

12. The passive device with multiple-path storage according to claim 1, wherein, The antenna circuit includes an antenna and an oscillation circuit, and the parameters of the oscillation circuit are adjustable to change the oscillation frequency of the antenna, and the electrical energy output by the changed antenna circuit is greater than that of the antenna circuit before the change.

13. The passive device with multiplexed storage according to claim 12, wherein, The parameters of the oscillation circuit are adjustable to make the oscillation frequency of the antenna change in a preset direction within a preset frequency range; The load includes a monitoring circuit, and the monitoring circuit monitors the electrical energy output by the antenna circuit and determines the target oscillation frequency and target parameters corresponding to the maximum electrical energy, so as to adjust the parameters of the oscillation circuit to the target parameters, and the oscillation frequency of the antenna is the target oscillation frequency.

14. The passive device with multiple-path storage according to claim 2, wherein, The load includes a driving circuit, and the processor obtains the energy value stored in the storage circuit. When the energy value exceeds the energy threshold, the processor controls the driving circuit to obtain a part of the electrical energy in the storage circuit for operation.

15. The passive device with multiple-channel storage according to claim 14, wherein, The processor monitors the electrical energy stored in the storage circuit. When the stored electrical energy exceeds the storage threshold, the processor outputs a pulse modulation control signal to the driving circuit, so that the driving circuit obtains a part of the electrical energy in the storage circuit.

16. A control method for a passive device, wherein, The passive device includes an antenna circuit, a storage circuit and a load. The antenna circuit is used to receive micro energy in the environment and convert it into electrical energy. The storage circuit is connected to the antenna circuit and is used to store the electrical energy. The storage circuit includes multiple storage branches, and each storage branch includes at least one storage capacitor, and the rated voltages of different storage branches are different. The load is connected to the storage circuit; The method includes: Obtain the rated voltage of each storage branch; According to the rated voltage of each storage branch, select one or more storage branches from the multiple storage branches to connect the antenna circuit and the load.

17. The control method of the passive device according to claim 16, wherein, The selecting one or more storage branches from the multiple storage branches to connect the antenna circuit and the load according to the rated voltage of each storage branch includes: Obtain the charging status of each storage branch; If no storage branch is in the charging state, determine the storage branch with the smallest rated voltage from the multiple storage branches as The target storage branch and charge the target storage branch; If there is a storage branch in a charging state, determine the storage branch with the minimum rated voltage among the multiple storage branches that have never been in a charging state as the target storage branch; After the storage branch currently in a charging state is fully charged, charge the target storage branch.

18. The control method of the passive device according to claim 16, wherein, The multiple storage branches at least include a first storage branch and a second storage branch, and the rated voltage of the first storage branch is less than that of the second storage branch; The control method further includes: Control the antenna circuit to charge the first storage branch; After the first storage branch is fully charged, control the first storage branch to charge the second storage branch.

19. The control method of the passive device according to claim 16, wherein, The passive circuit further includes a rectification circuit, the rectification circuit is connected between the antenna circuit and the storage circuit, the rectification circuit is used to rectify the electric energy output by the antenna circuit, the rectification circuit includes multiple rectification branches connected in parallel, and the conduction voltages of different rectification branches are different; The notification method further includes: Obtain the first voltage of the electric energy output by the antenna circuit; Select one from the multiple rectification branches to connect the antenna circuit and the storage circuit according to the first voltage.

20. The control method of the passive device according to claim 16, wherein, The passive circuit further includes a rectification circuit, the rectification circuit is connected between the antenna circuit and the storage circuit, the rectification circuit is used to rectify the electric energy output by the antenna circuit, the rectification circuit includes multiple rectification branches connected in parallel, the internal resistances of different rectification branches are different, and the load is connected to the rectification circuit; The method includes: Obtain the first duration of the electric energy output by the antenna circuit; Select one from the multiple rectification branches to connect the antenna circuit and the storage circuit according to the first duration.

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