Wireless power supply method and device for implantable device

Abstract

This specification provides one or more embodiments of a wireless power supply method and apparatus for an implantable device. The implantable device includes a load module and an impedance compensation capacitor connected in parallel. When the wireless power supply device corresponding to the implantable device is wirelessly powered, it first obtains the trend information of the power supply efficiency of the implantable device changing with the equivalent impedance during the wireless power supply process. Then, based on the trend information of the power supply efficiency changing with the equivalent impedance, it controls the power supply power or the power supply start-up time period of the wireless power supply device during the wireless power supply process, so that the equivalent impedance of the implantable device during the wireless power supply process is constrained by the target impedance.

Description

Technical Field

[0001] This specification relates to the field of wireless power supply technology for implantable devices, and more particularly to a wireless power supply method and apparatus for implantable devices. Background Technology

[0002] Implantable devices have irreplaceable advantages in fields such as neuromodulation and brain-computer interfaces, such as better stimulation effects and higher quality neural signals. Currently, to meet the miniaturization requirements of implantable devices, wireless power supply is typically used in related technologies.

[0003] However, implantable devices often employ intermittent operation to reduce power consumption due to power consumption limitations. This operation mode causes the system input impedance to fluctuate within a large range, making it impossible for wireless power supply to achieve optimal impedance matching and limiting power supply efficiency. Summary of the Invention

[0004] In view of the above, one or more embodiments of this specification provide a wireless power supply method and apparatus for an implantable device.

[0005] To achieve the above objectives, one or more embodiments of this specification provide the following technical solutions: According to a first aspect of one or more embodiments of this specification, a wireless power supply method for an implantable device is provided, the method being applied in a wireless power supply device corresponding to the implantable device, the implantable device including a load module and an impedance compensation capacitor connected in parallel; the method includes: The trend information of the power supply efficiency of the implantable device as a function of equivalent impedance during wireless power supply is obtained; the equivalent impedance is the impedance after the load module and the impedance compensation capacitor are connected in parallel; the target impedance of the wireless power supply device is matched with the equivalent impedance corresponding to the highest power supply efficiency in the trend information. Based on the trend information, the power supply or power-on period of the wireless power supply device during the wireless power supply process is controlled so that the equivalent impedance of the implanted device during the wireless power supply process is constrained by the target impedance.

[0006] According to a second aspect of one or more embodiments of this specification, an electronic device is provided, comprising: processor; Memory used to store processor-executable instructions; The processor implements the method as described in the first aspect by running the executable instructions.

[0007] According to a third aspect of one or more embodiments of this specification, a computer-readable storage medium is provided that stores computer instructions thereon, which, when executed by a processor, implement the steps of the method as described in the first aspect.

[0008] According to a fourth aspect of one or more embodiments of this specification, a computer program product is provided, comprising: a computer program / instructions that, when executed by a processor, implement the method as described in the first aspect.

[0009] As can be seen from the above embodiments, the wireless power supply method and apparatus for an implantable device provided in one or more embodiments of this specification include a load module and an impedance compensation capacitor connected in parallel. When the wireless power supply device corresponding to the implantable device performs wireless power supply, it first obtains the trend information of the power supply efficiency of the implantable device changing with the equivalent impedance during the wireless power supply process. Then, based on the trend information of the power supply efficiency changing with the equivalent impedance, it controls the power supply power or power supply start-up time period of the wireless power supply device during the wireless power supply process, so that the equivalent impedance of the implantable device during the wireless power supply process is constrained by the target impedance. By connecting an impedance compensation capacitor in parallel across the load model of the implantable device, which is different from the commonly used impedance matching capacitor placed in the AC circuit before the rectifier bridge, but placed after the rectifier bridge, the characteristic of the impedance of the impedance compensation capacitor changing continuously with charging and discharging can be used to determine the trend information of the power supply efficiency of the implantable device changing with the equivalent impedance during the wireless power supply process. After determining the trend information of power supply efficiency changing with equivalent impedance, the power supply power or power supply start-up time of the wireless power supply device can be controlled using this trend information. By controlling the power supply power or power supply start-up time, the equivalent impedance of the implanted device during the wireless power supply process can be limited to near the target impedance of the wireless power supply device, thereby improving the efficiency of ineffective power supply. Attached Figure Description

[0010] Figure 1 This is an exemplary embodiment of a schematic diagram illustrating the architecture of an application scenario for a wireless power supply method for an implantable device.

[0011] Figure 2 This is a schematic flowchart of a wireless power supply method for an implantable device provided in an exemplary embodiment.

[0012] Figure 3 This is an exemplary embodiment of a graph showing the trend of power supply efficiency as a function of equivalent impedance in an implantable device during wireless power supply.

[0013] Figure 4 This is an exemplary embodiment of a circuit diagram showing an impedance compensation capacitor during the charging process.

[0014] Figure 5 This is an exemplary embodiment of a circuit diagram showing the discharge process of an impedance compensation capacitor.

[0015] Figure 6 This is a schematic diagram of a wireless power supply device determining the power supply start-up time period, provided as an exemplary embodiment.

[0016] Figure 7 This is a schematic diagram illustrating another wireless power supply device, provided in an exemplary embodiment, for determining the power supply activation period.

[0017] Figure 8 This is a schematic diagram of the structure of an electronic device provided in an exemplary embodiment.

[0018] Figure 9 This is a block diagram of a wireless power supply device for an implantable device provided in an exemplary embodiment. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.

[0020] The organizational information (including but not limited to organizational equipment information, organizational personal information, etc.) and data (including but not limited to data used for analysis, stored data, and displayed data) involved in this manual are all information and data authorized by the organization or fully authorized by all parties. Furthermore, the collection, use, and processing of such data must comply with the relevant laws, regulations, and standards of the relevant countries and regions, and corresponding operation portals are provided for the organization to choose to authorize or refuse.

[0021] As described in the background section, in order to meet the miniaturization requirements of implantable devices, wireless power supply is usually adopted in current related technologies. However, due to the power consumption limitations of implantable devices, they often adopt intermittent operation mode to reduce power consumption. This operation mode will cause the system input impedance to fluctuate within a large range, making it impossible for wireless power supply to achieve optimal impedance matching. Therefore, when wirelessly powering implantable devices, the related technologies not only have low power supply efficiency, but may also face the technical problem of severe overheating of implantable devices due to low power supply efficiency.

[0022] In addition, in some related technologies, impedance matching circuits are used to optimize the impedance of wireless power supply systems in order to solve the above-mentioned technical problems. That is, the impedance of wireless power supply devices is adjusted by impedance matching circuits to match the fluctuating impedance of implanted devices as much as possible. However, on the one hand, impedance matching circuits rely on inductors, which have large losses at high frequencies. On the other hand, the accuracy of the devices has a great impact on the matching effect. Device deviations can easily lead to a decrease in energy transmission efficiency and have poor flexibility.

[0023] In summary, to address the problems in the aforementioned related technologies, this specification provides a wireless power supply method for an implantable device. This method is applied to a wireless power supply device corresponding to the implantable device. The implantable device is equipped with a load module and an impedance compensation capacitor connected in parallel. Since the equivalent impedance after parallel connection is determined by the two components in parallel and is less than the impedance of any single component, after connecting the impedance compensation capacitor in parallel across the load model of the implantable device, the characteristic of the impedance of the impedance compensation capacitor changing continuously with charging and discharging can be used to determine the trend information of the power supply efficiency changing with the equivalent impedance. Then, this trend information can be used to control the power supply power or power supply start-up time period of the wireless power supply device during the wireless power supply process. By controlling the power supply power or power supply start-up time period, the equivalent impedance of the implantable device during the wireless power supply process can be limited to near the target impedance of the wireless power supply device, so that the impedance matching between the two sides of the wireless charging is better and the wireless power supply efficiency is improved.

[0024] It should be noted that because the impedance of the impedance compensation capacitor increases continuously during charging and decreases continuously during discharging, this characteristic can be utilized to control the charging and discharging time of the impedance compensation capacitor by controlling the power supply period, thereby allowing the equivalent impedance to vary within a certain range of the target impedance of the wireless power supply device. Simultaneously, during charging, the voltage across the impedance compensation capacitor continuously increases, meaning the supply voltage continuously increases. Since the equivalent impedance is determined by both the supply voltage and the supply current, the supply current can be adjusted by controlling the supply power during the increasing supply voltage, thus affecting the equivalent resistance. Therefore, by controlling the supply power, the equivalent impedance can be maintained near the target impedance of the wireless power supply device. Furthermore, because the impedance compensation capacitor has a certain energy storage function, even if the wireless power supply device stops supplying power, the impedance compensation capacitor can still discharge to provide power to the implantable device, further ensuring the continuous power supply to the implantable device.

[0025] Figure 1This is a schematic diagram illustrating an application scenario of a wireless power supply method for an implantable device, provided by an exemplary embodiment. The implantable device is equipped with a receiving coil, and the wireless power supply device is equipped with a transmitting coil. When the wireless power supply device wirelessly supplies power to the implantable device, it transmits power electromagnetic waves through the transmitting coil, and the receiving coil couples and receives these waves, thus supplying power to the implantable device. Therefore, the implantable device and the wireless power supply device form a wireless power supply system based on magnetic coupling. In some embodiments, the receiving coil and the transmitting coil also have wireless communication functionality. In this embodiment, the wireless power supply device can send operating parameter configuration values ​​to the implantable device through the wireless communication function of the coils, and the implantable device can send charging parameters such as the supply voltage and supply current during the charging process to the wireless power supply device through the wireless communication function of the coils.

[0026] refer to Figure 2 This is a flowchart illustrating a wireless power supply method for an implantable device provided in this specification. The method is applied to a wireless power supply device corresponding to the implantable device, which includes a load module and an impedance compensation capacitor connected in parallel. The method includes the following steps: S202, obtain the trend information of the power supply efficiency of the implantable device changing with the equivalent impedance during the wireless power supply process; the equivalent impedance is the impedance after the load module and the impedance compensation capacitor are connected in parallel; the target impedance of the wireless power supply device is matched with the equivalent impedance corresponding to the highest power supply efficiency in the trend information.

[0027] The load module of an implantable device is a collection of modules used to implement various functions of the implantable device. Since implantable devices generally operate intermittently, the impedance of the load module differs significantly between sleep and non-sleep modes. Furthermore, even in non-sleep mode, the impedance of the load module varies considerably depending on the function being performed. To minimize the impact of the load module on changes in the equivalent impedance of the circuit during wireless power supply, this embodiment connects an impedance compensation capacitor in parallel across the load module. This ensures that the equivalent impedance during charging is determined by the combined impedance of the load module and the impedance compensation capacitor. Since the parallel equivalent impedance is less than the impedance of either the impedance compensation capacitor or any single component of the load module, when the impedance of the impedance compensation capacitor is less than the impedance of the load module, the parallel equivalent impedance is primarily influenced by the impedance of the impedance compensation capacitor. The impedance of the impedance compensation capacitor changes with the charging and discharging of the capacitor, making its impedance changes easier to predict and control.

[0028] To more accurately determine the variation pattern of equivalent impedance, in the embodiments of this specification, after connecting an impedance compensation capacitor in parallel across the load module, the trend information of the power supply efficiency of the implanted device changing with the equivalent impedance during wireless power supply is further obtained. This trend information can be obtained in advance through experiments or formula derivation, and there is no limitation on this. In some embodiments, to more accurately determine the above trend information, an optimal operating impedance Z0 (i.e., the equivalent impedance corresponding to the highest power supply efficiency) can be determined first, and then the target impedance of the wireless power supply device can be determined based on this impedance. That is, the target impedance of the wireless power supply device matches the equivalent impedance corresponding to the highest power supply efficiency in the trend information. In some embodiments, the two can be directly made equal. To avoid the influence of different operating modes of the load module on the equivalent impedance, in some embodiments, the optimal operating impedance Z0 can be made less than or equal to the minimum load impedance Z of the load module in different operating modes. Lmin Once the optimal operating impedance Z0 is determined, the power supply efficiency corresponding to different equivalent impedances can be determined based on the optimal operating impedance Z0 and the target impedance of the wireless power supply device, thereby forming the aforementioned trend information.

[0029] It should be noted that the trend information of power supply efficiency as a function of equivalent impedance during wireless power supply of the implantable device can be represented in any form, and there is no limitation thereto. For example, in some embodiments, the above trend information can be represented in tabular form. In some embodiments, refer to Figure 3 The above trend information can also be represented by a line graph. Figure 3 In this context, Z0 represents the optimal operating impedance, η0 represents the highest power supply efficiency of the implantable device during wireless power supply, and Z... out The equivalent impedance representing the change is given by... Figure 3 It can be seen that as the equivalent impedance increases, the power supply efficiency will first increase and then decrease, and reach the highest efficiency value at the optimal working impedance Z0.

[0030] S204, based on the trend information, control the power supply or power-on time period of the wireless power supply device during the wireless power supply process, so that the equivalent impedance of the implanted device during the wireless power supply process is constrained by the target impedance.

[0031] After obtaining the trend information of the power supply efficiency of the implantable device changing with the equivalent impedance during wireless power supply, the power supply power of the wireless power supply device during wireless power supply can be controlled according to the trend information, or the power supply start-up time period of the wireless power supply device during wireless power supply can be controlled according to the trend information, so that the equivalent impedance of the implantable device during wireless power supply is constrained by the target impedance.

[0032] It should be noted that the aforementioned power supply activation period refers to the time during which the wireless power supply device provides power to the implantable device. Correspondingly, the wireless power supply process in this application also includes a time during which the wireless power supply device stops providing power to the implantable device. During this time, the energy stored in the impedance compensation capacitor can be used to provide power to the implantable device. Since the impedance of the impedance compensation capacitor continuously increases during charging and continuously decreases during discharging, this characteristic can be utilized to control the charging and discharging time of the impedance compensation capacitor through the power supply activation period. This allows the equivalent impedance to vary around the target impedance of the wireless power supply device based on the controllable impedance of the impedance compensation capacitor, thereby improving power supply efficiency. Furthermore, as the voltage across the impedance compensation capacitor continuously increases during charging, and since this voltage is the supply voltage in a parallel circuit, the supply voltage also continuously increases as the impedance compensation capacitor charges during the continuous power supply process of the wireless power supply device to the implantable device. In this process, the equivalent impedance is determined by both the supply voltage and the supply current. As the supply voltage increases, the supply current can be adjusted by controlling the supply power, thereby affecting the equivalent resistance. Therefore, by controlling the supply power, the equivalent impedance can be maintained near the target impedance of the wireless power supply device, thus improving the efficiency of wireless power supply.

[0033] refer to Figure 4 This is a circuit diagram illustrating the charging process of an impedance compensation capacitor. Figure 4 The equivalent impedance in the figure can be obtained by the following formula: ; It should be noted that during the charging process of the impedance compensation capacitor, the current is divided into a current I flowing to the impedance compensation capacitor after passing through the rectifier bridge. C and the current I flowing to the load module L Where Z represents the equivalent impedance after parallel connection, Z L Z represents the impedance of the load module. C Let P represent the impedance of the impedance compensation capacitor, P represent the power supplied by the wireless power supply device, and Pη represent the actual receiving power of the implanted device. Since the impedance compensation capacitor initially has almost zero charge and the voltage across it is at its minimum, its impedance is also at its minimum and close to zero. As the charging time increases, the amount of charge in the capacitor increases, and the voltage Vin across it increases, leading to a greater impedance. Therefore, the impedance of the impedance compensation capacitor gradually increases from a value close to zero to approximately infinity during charging. According to the above formula, the equivalent impedance Z after parallel connection is less than the impedance Z of the impedance compensation capacitor. C Therefore, during the initial charging stage of the impedance compensation capacitor, ZC Much smaller than Z L The equivalent impedance Z is mainly affected by the impedance Z of the impedance compensation capacitor. C The impedance Z of the load module can be ignored because the impedance is negligible. L The fluctuation of the impedance compensation capacitor affects the equivalent impedance Z. When the capacitance of the impedance compensation capacitor is large, the charging time of the capacitor will be longer, meaning that the equivalent impedance Z is mainly affected by the fluctuation of the impedance Z. C The duration of the impact will increase; therefore, in some embodiments, the capacitance of the impedance compensation capacitor can be set as needed, and Z can be utilized. C Less than Z L This charging process enables effective control of the equivalent impedance during charging.

[0034] refer to Figure 5 The diagram shows the circuit schematic for the discharge process of the impedance compensation capacitor. When the wireless power supply device stops supplying power to the implanted device, the impedance compensation capacitor initiates its discharge process. At this time, current flows from the impedance compensation capacitor to the load module. As the discharge continues, the amount of charge contained in the impedance compensation capacitor decreases, and the voltage Vin across the capacitor also decreases, leading to a decrease in the impedance Z of the impedance compensation capacitor. C It keeps decreasing, and when Z C Less than Z L When, the equivalent impedance Z is mainly affected by Z C The effect of this leads to a continuous decrease in the equivalent impedance Z after parallel connection during the discharge process of the impedance compensation capacitor, thereby achieving effective control of the equivalent impedance during the discharge process.

[0035] To more accurately control the power-on time, in some embodiments of this specification, the power-on time of the wireless power supply device during the wireless power supply process is controlled based on the trend information, including: When the wireless power supply device supplies power at a fixed power, a target impedance range that meets the preset power supply efficiency is determined from the trend information, and the power supply start-up time period is controlled based on the target equivalent impedance range so that the equivalent impedance of the implanted device during the wireless power supply process is within the target impedance range.

[0036] It should be noted that the above-mentioned preset power supply efficiency can be set as needed, and there are no limitations on it. For example, refer to... Figure 3 , where η T This represents the current preset power supply efficiency, i.e., from η T The power supply efficiency up to η0 can meet the preset power supply efficiency. Figure 3In this context, the target impedance range is the equivalent impedance range from Z1 to Z2. As discussed above, when the wireless power supply device is turned on, the equivalent impedance gradually increases; when the wireless power supply device is turned off, the equivalent impedance gradually decreases. Based on this variation in equivalent impedance, a suitable power-on time period can be set to ensure that the equivalent impedance of the implanted device during wireless power supply is within the target impedance range, thus guaranteeing that the power supply efficiency is greater than or equal to the preset power supply efficiency.

[0037] It should be noted that the above-mentioned fixed power can be set as needed and is not limited thereto. In some embodiments, in order to further improve power supply efficiency, the above-mentioned fixed power can be determined by the following formula: ; Wherein, P0 represents the aforementioned fixed power, that is, the fixed power supply power of the wireless power supply device. The current preset power supply efficiency, Z0 represents the upper limit voltage for safe operation of implantable devices, and Z0 represents the optimal operating impedance.

[0038] To reduce the switching frequency of unpowered devices between on and off, in some embodiments of this specification, the power supply on-time period is controlled based on the target equivalent impedance range, including: The power supply voltage of the implantable device during the wireless power supply process is obtained, and the real-time equivalent impedance of the implantable device during the wireless power supply process is determined based on the power supply voltage. When the real-time equivalent impedance is equal to the lower boundary of the target impedance range, the wireless power supply device is controlled to start supplying power. When the real-time equivalent impedance is equal to the upper boundary of the target impedance range, the wireless power supply device is controlled to stop supplying power; wherein, the power supply start time period is the time period between the start time of power supply and the stop time of power supply.

[0039] To maintain the maximum power-on period, in this embodiment of the specification, the wireless power supply device is controlled to start supplying power when the real-time equivalent impedance is equal to the lower boundary of the target impedance range, and the wireless power supply device is controlled to stop supplying power when the real-time equivalent impedance is equal to the upper boundary of the target impedance range. (Reference) Figure 3 and Figure 6When the real-time equivalent impedance of the implantable device reaches Z1 (current lower boundary) during wireless power supply, the wireless power supply device can be controlled to start supplying power. As the real-time equivalent impedance continues to increase and reaches Z2 (current upper boundary), the wireless power supply device can be controlled to stop supplying power. That is, the current power supply start-up period is t1. After the power supply stops, the impedance compensation capacitor will discharge, and after the t2 period, the real-time equivalent impedance will return to Z1 (current lower boundary). At this time, the wireless power supply device can be controlled to start supplying power again, and this cycle can be repeated continuously. It should be noted that when the wireless power supply device first starts wirelessly supplying power to the implantable device, an initialization phase is required. During the initialization phase, the wireless power supply device can continuously supply power to the implantable device at a specified power until the real-time equivalent impedance reaches the lower boundary of the target impedance range, and then the power supply start-up period of the embodiment in this specification is started, which serves as the basis for subsequent invalid power supply.

[0040] In some embodiments, the implantable device further includes a voltage detection module, a current detection module, and a communication module. After the voltage and current are detected by the voltage and current detection modules, the voltage and current are transmitted to the wireless power supply device via the communication module.

[0041] In some embodiments of this specification, determining the real-time equivalent impedance of the implantable device based on the supply voltage includes: The power supply current of the implantable device during wireless power supply is obtained, and the real-time equivalent impedance is determined based on the power supply voltage and the power supply current. Alternatively, obtain the correspondence between different supply voltages and real-time equivalent impedances, and determine the real-time equivalent impedance based on the supply voltages and the correspondence.

[0042] It should be noted that, in order to accurately determine the real-time equivalent impedance, the real-time equivalent impedance can be determined directly by the ratio of the supply voltage to the supply current. Alternatively, in order to reduce the detection of the supply current, the correspondence between different supply voltages and real-time equivalent impedances can be determined in advance, and then the real-time equivalent impedance can be determined according to the supply voltage and the correspondence.

[0043] In some examples in this manual, due to the limitations of the on / off speed of wireless power supply devices, Figure 7 There are lower limits for t3 and t4. , Therefore, the following requirements apply to the lower limit of the capacitance value of the impedance compensation capacitor: ; In some examples in this specification, the above formulas can be simplified to the following in practical applications using a linear approximation: ; Where C represents the capacitance value of the impedance compensation capacitor. This represents the lower limit of the charging time for the impedance compensation capacitor. This represents the lower limit of the discharge time of the impedance compensation capacitor. The minimum power-on time of the wireless power supply device can be determined by the minimum power-on time, which is the time from receiving the power-on command to the actual power-on. The minimum shutdown time of the wireless power supply device can be determined by the minimum shutdown time of the device, which is the time from receiving the shutdown command to actually shutting down. V2 represents the upper limit of the safe operating voltage for the implantable device, i.e., the upper boundary of the safe voltage range; V1 represents the lower limit of the safe operating voltage for the implantable device, i.e., the lower boundary of the safe voltage range; P0 represents the fixed power supply of the wireless power supply device; Z... L This indicates the impedance of the load module. To ensure... and The impact of the charge / discharge cycle ratio is negligible, and in practice, capacitors with a large lower limit of capacitance are often used, such as more than 10 times.

[0044] In some examples of this specification, the process of determining the capacitance value of the impedance compensation capacitor may include: The minimum charging time of the impedance compensation capacitor is determined by the minimum turn-on time of the wireless power supply device, and the minimum discharging time of the impedance compensation capacitor is determined by the minimum turn-off time of the wireless power supply device. Obtain the upper and lower safe operating voltage limits for implantable devices; Obtain the impedance of the load module of the implanted device and determine the power supply power of the wireless power supply device; The capacitance value of the impedance compensation capacitor is determined based on the lower limit of the charging duration, the lower limit of the discharging duration, the upper limit voltage for safe operation, the lower limit voltage for safe operation, the impedance of the load module, and the power supply of the wireless power supply device.

[0045] In some embodiments of this specification, controlling the power supply of the wireless power supply device during the wireless power supply process based on the trend information includes: When the wireless power supply device supplies power at a non-fixed power, the power supply is controlled based on the trend information so that the equivalent impedance of the implanted device during the wireless power supply process matches the target impedance.

[0046] It should be noted that when the wireless power supply device supplies power at a non-fixed power, as shown in the above embodiments, the supply voltage continuously increases during the ineffective power supply process. Since the equivalent impedance is determined by the supply voltage and supply current, the equivalent impedance of the implantable device during wireless power supply can be matched with the target impedance by controlling the supply power. For example, when the supply voltage is low, the supply power can be reduced to decrease the supply current, thereby maintaining a higher equivalent impedance. When the supply voltage is high, the supply power can be increased to increase the supply current, thus preventing the equivalent impedance from continuing to increase.

[0047] In some embodiments of this specification, controlling the power supply based on the trend information includes: Obtain the power supply voltage of the implantable device during the wireless power supply process; Determine the target supply current that matches the target impedance based on the equivalent impedance corresponding to the highest supply efficiency and the supply voltage. The power supply is controlled based on the target power supply current and the power supply voltage.

[0048] In this embodiment, in order to ensure power supply efficiency, when controlling the power supply power, the power supply voltage of the implanted device during the wireless power supply process is first obtained. Then, the target power supply current that matches the target impedance is determined based on the equivalent impedance corresponding to the highest power supply efficiency and the power supply voltage. Finally, the power supply power is controlled based on the target power supply current and the power supply voltage.

[0049] In some embodiments, the power supply can be controlled using the following formula: ； or,

[0050] in, For optimal matching impedance For real-time voltage measurement at the receiving end, For real-time current measurement at the receiving end, η T This indicates the current preset power supply efficiency.

[0051] To ensure the safety of implantable devices, in some embodiments of this specification, the wireless power supply method for the implantable device further includes: Obtain the safe voltage range corresponding to the implantable device; The system acquires the power supply voltage of the implantable device during the wireless power supply process, and controls the wireless power supply device to stop supplying power when the power supply voltage is not within the safe voltage range.

[0052] It should be noted that implantable devices have a corresponding safe voltage range. When the supply voltage is below this range, the load module will not function properly; when the supply voltage is above this range, the load module will operate at excessive power. Therefore, to ensure the normal operation of the implantable device while avoiding safety hazards, this embodiment acquires the supply voltage of the implantable device during the wireless power supply process and controls the wireless power supply device to stop supplying power when the supply voltage is outside the safe voltage range. (Reference) Figure 7 , Figure 7 The safe voltage range is V1 to V2. As the wireless power supply device continues to supply power, the supply voltage will continue to rise. When the supply voltage reaches V1, it means that the supply voltage has started to fall within the safe voltage range. Then, when the supply voltage reaches V2, it means that the supply voltage has started to fall outside the safe voltage range. At this time, it is necessary to control the wireless power supply device to stop supplying power.

[0053] The wireless power supply method for an implantable device provided in this specification includes a load module and an impedance compensation capacitor connected in parallel. Since the equivalent impedance after parallel connection is determined by the two components and is less than the impedance of any single component, the impedance compensation capacitor, whose impedance changes continuously with charging and discharging, weakens the impact of different operating modes of the load module on the equivalent impedance. This makes it easier to obtain the variation law of the equivalent impedance after parallel connection of the load module and the impedance compensation capacitor, thereby determining the trend information of the power supply efficiency of the implantable device as a function of the equivalent impedance during wireless power supply. After determining the trend information of the power supply efficiency as a function of the equivalent impedance, this trend information can be used to control the power supply power or power-on time period of the wireless power supply device during wireless power supply. By controlling the power supply power or power-on time period, the equivalent impedance of the implantable device during wireless power supply can be limited to near the target impedance of the wireless power supply device, so that the impedances of the two sides of the wireless charging are more matched, thus improving the wireless power supply efficiency.

[0054] Figure 8 This is a schematic structural diagram of a device provided in an exemplary embodiment. Please refer to... Figure 8At the hardware level, the device includes a processor 802, an internal bus 804, a network interface 806, memory 808, and non-volatile memory 810, and may also include other hardware required for business operations. One or more embodiments of this specification can be implemented in software, such as the processor 802 reading the corresponding computer program from the non-volatile memory 810 into memory 808 and then running it. Of course, in addition to software implementation, one or more embodiments of this specification do not exclude other implementation methods, such as logic devices or a combination of hardware and software, etc. That is to say, the execution subject of the following processing flow is not limited to each logic unit, but can also be hardware or logic devices.

[0055] Please refer to Figure 9 Wireless power supply devices for implantable devices can be applied to, for example... Figure 8 The device shown is used to implement the technical solution of this specification. In some embodiments, Figure 8 The device shown can be a wireless power supply device corresponding to the implantable device. The implantable device includes a load module and an impedance compensation capacitor connected in parallel. The wireless power supply device for the implantable device may include: The acquisition unit 902 acquires the trend information of the power supply efficiency of the implantable device changing with the equivalent impedance during the wireless power supply process; the equivalent impedance is the impedance after the load module and the impedance compensation capacitor are connected in parallel; the target impedance of the wireless power supply device is matched with the equivalent impedance corresponding to the highest power supply efficiency in the trend information. The control unit 904 controls the power supply or power-on time period of the wireless power supply device during the wireless power supply process based on the trend information, so that the equivalent impedance of the implanted device during the wireless power supply process is constrained by the target impedance.

[0056] For ease of description, the above devices are described by dividing them into various modules or units based on their functions. Of course, when implementing one or more of these specifications, the functions of each module or unit can be implemented in the same or different software and / or hardware, or a module that performs the same function can be implemented by a combination of multiple sub-modules or sub-units, etc. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division; in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another method, or some features may be ignored or not executed.

[0057] Based on the same concept as the above method, this specification also provides an electronic device, including: a processor; a memory for storing processor-executable instructions; wherein the processor implements the steps of the wireless power supply method for an implantable device as described in any of the above embodiments by executing the executable instructions.

[0058] Based on the same concept as the methods described above, this specification also provides a computer-readable storage medium having computer instructions stored thereon that, when executed by a processor, implement the steps of the wireless power supply method for an implantable device as described in any of the above embodiments.

[0059] Based on the same concept as the methods described above, this specification also provides a computer program product, including a computer program / instructions that, when executed by a processor, implement the steps of the wireless power supply method for an implantable device as described in any of the above embodiments.

[0060] The systems, devices, modules, or units described in the above embodiments can be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer, which can take the form of a personal computer, laptop computer, cellular phone, camera phone, smartphone, personal digital assistant, media player, navigation device, email sending and receiving device, game console, tablet computer, wearable device, or any combination of these devices.

[0061] In a typical configuration, a computer includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0062] Memory may include non-persistent storage in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0063] Computer-readable media, including both permanent and non-permanent, removable and non-removable media, can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, disk storage, quantum memory, graphene-based storage media or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0064] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0065] The foregoing has described specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired result. In some embodiments, multitasking and parallel processing are possible or may be advantageous.

[0066] The terminology used in one or more embodiments of this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of one or more embodiments of this specification. The singular forms “a,” “described,” and “the” used in one or more embodiments of this specification and in the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0067] It should be understood that although the terms first, second, third, etc., may be used to describe various information in one or more embodiments of this specification, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of one or more embodiments of this specification, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "in response to a determination," or "when," or "in the event of a determination."

[0068] The above description is merely a preferred embodiment of one or more embodiments of this specification and is not intended to limit the scope of one or more embodiments of this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments of this specification should be included within the protection scope of one or more embodiments of this specification.

Claims

1. A wireless power supply method for an implantable device, characterized in that, The method is applied to a wireless power supply device corresponding to the implantable device, wherein the implantable device includes a load module and an impedance compensation capacitor connected in parallel; the method includes: The trend information of the power supply efficiency of the implantable device as a function of equivalent impedance during wireless power supply is obtained; the equivalent impedance is the impedance after the load module and the impedance compensation capacitor are connected in parallel; the target impedance of the wireless power supply device is matched with the equivalent impedance corresponding to the highest power supply efficiency in the trend information. Based on the trend information, the power supply or power-on time period of the wireless power supply device during the wireless power supply process is controlled so that the equivalent impedance of the implanted device during the wireless power supply process is constrained by the target impedance.

2. The method according to claim 1, characterized in that, Controlling the power-on time of the wireless power supply device during the wireless power supply process based on the trend information includes: When the wireless power supply device supplies power at a fixed power, a target impedance range that meets the preset power supply efficiency is determined from the trend information, and the power supply start-up time period is controlled based on the target impedance range so that the equivalent impedance of the implanted device during the wireless power supply process is within the target impedance range.

3. The method according to claim 2, characterized in that, Controlling the power supply activation time period based on the target impedance range includes: The power supply voltage of the implantable device during the wireless power supply process is obtained, and the real-time equivalent impedance of the implantable device during the wireless power supply process is determined based on the power supply voltage. When the real-time equivalent impedance is equal to the lower boundary of the target impedance range, the wireless power supply device is controlled to start supplying power. When the real-time equivalent impedance is equal to the upper boundary of the target impedance range, the wireless power supply device is controlled to stop supplying power; wherein, the power supply start time period is the time period between the start time of power supply and the stop time of power supply.

4. The method according to claim 3, characterized in that, Determining the real-time equivalent impedance of the implantable device based on the supply voltage includes: The power supply current of the implantable device during wireless power supply is obtained, and the real-time equivalent impedance is determined based on the power supply voltage and the power supply current. Alternatively, obtain the correspondence between different supply voltages and real-time equivalent impedances, and determine the real-time equivalent impedance based on the supply voltages and the correspondence.

5. The method according to claim 1, characterized in that, Controlling the power supply of the wireless power supply device during the wireless power supply process based on the trend information includes: When the wireless power supply device supplies power at a non-fixed power, the power supply is controlled based on the trend information so that the equivalent impedance of the implanted device during the wireless power supply process matches the target impedance.

6. The method according to claim 5, characterized in that, Controlling the power supply based on the trend information includes: Obtain the power supply voltage of the implantable device during the wireless power supply process; Determine the target supply current that matches the target impedance based on the equivalent impedance corresponding to the highest supply efficiency and the supply voltage. The power supply is controlled based on the target power supply current and the power supply voltage.

7. The method according to claim 1, characterized in that, The method further includes: Obtain the safe voltage range corresponding to the implantable device; The system acquires the power supply voltage of the implantable device during the wireless power supply process, and controls the wireless power supply device to stop supplying power when the power supply voltage is not within the safe voltage range.

8. An electronic device, characterized in that, include: processor; Memory used to store processor-executable instructions; The processor implements the method as described in any one of claims 1-7 by executing the executable instructions.

9. A computer-readable storage medium, characterized in that, It stores computer instructions that, when executed by a processor, implement the steps of the method as described in any one of claims 1-7.

10. A computer program product, characterized in that, include: A computer program / instruction that, when executed by a processor, implements the method as described in any one of claims 1-7.

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