Tumor electric field treatment system and power supply switching device

Abstract

The invention relates to the technical field of tumor electric field treatment, and discloses a tumor electric field treatment system and a power supply switching device.The tumor electric field treatment system comprises a plurality of power supply devices and a load, and each power supply device is suitable for supplying power to the load so as to apply an alternating electric field to the tumor part of the human body; the power supply switching device comprises a plurality of power supply input ends and a power supply output end, each power supply input end in the plurality of power supply input ends is connected with the power supply end of the corresponding power supply device, and the power supply output end is connected with the load; the power supply switching circuit is configured to communicate one of the plurality of power supply input ends with the power supply output end based on the power supply voltage of each power supply device, so that the plurality of power supply devices are seamlessly switched to supply power to the load, and the power supply is ensured not to be interrupted; the effective treatment electric field duration of the tumor electric field therapeutic apparatus applied to the tissue area of the tumor is improved, and the treatment effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of tumor electric field therapy, and in particular to a power supply switching device for a tumor electric field therapy system and a tumor electric field therapy system having the power supply switching device. Background Art

[0002] Using electric fields to treat tumors is one of the current frontiers of research and development. Tumor Treating Fields (TTF) is a method of treating tumors or cancer by applying low-intensity, medium-frequency alternating electric fields to cancer cells, thereby disrupting the process of cell mitosis, inhibiting mitosis, and inducing apoptosis. Studies have shown that TTF is effective in treating diseases such as glioblastoma, non-small cell lung cancer, and malignant pleural mesothelioma. The electric fields applied by this method can affect the aggregation of microtubules in dividing cancer cells, prevent spindle formation in dividing cancer cells, inhibit the process of mitosis, and induce apoptosis.

[0003] In the related art, a tumor therapy field system used for tumor treatment primarily consists of a tumor therapy field device and an electrode patch electrically connected to the device. The electrode patch is typically applied to the skin corresponding to the lesion, applying an alternating electrical signal to the tumor tissue area for electric field therapy. Tumor therapy field devices typically use either battery power or adapter power. Adapter power is recommended when the user is inactive, while battery power is recommended when the user is active or outdoors. If the adapter needs to switch to battery power due to an unexpected power outage, activity such as being outdoors, or low battery power, the device needs to switch to adapter power. During this power mode switch, the device temporarily interrupts power until the switch is complete. After the switch is complete, the device must undergo an initialization process and restart before the therapy can resume. Research has shown that the effectiveness of tumor therapy using electric fields is related to the duration of the effective therapeutic field applied by the device to the tumor tissue area; the longer the duration, the better the treatment effect. However, switching between the current battery-powered and adapter-powered power modes will interrupt the electric field therapy, shorten the electric field therapy duration, and thus reduce the treatment effect. Summary of the Invention

[0004] The present application provides a tumor electric field therapy system and a power supply switching device, which solves the problem of interruption of electric field therapy during power supply mode switching of current tumor electric field therapy devices. By optimizing the circuit design of the power supply switching device, multiple power supply devices can seamlessly switch power supply, ensuring that power supply will not be interrupted, thereby increasing the duration of the effective therapeutic electric field applied by the tumor electric field therapy device to the tissue area where the tumor is located and improving the treatment effect.

[0005] In order to achieve the above objectives, the main technical solutions adopted in this application include:

[0006] In a first aspect, an embodiment of the present application provides a power supply switching device for a tumor electric field therapy system, wherein the tumor electric field therapy system includes multiple power supply devices and loads, each of the multiple power supply devices is suitable for supplying power to the load respectively to apply an alternating electric field to the tumor site of the human body, and the power supply switching device includes: multiple power supply input terminals and power supply output terminals, each of the multiple power supply input terminals is respectively connected to the power supply terminal of the corresponding power supply device, and the power supply output terminal is connected to the load; a power supply switching circuit, wherein the power supply switching circuit is configured to connect one of the multiple power supply input terminals to the power supply output terminal based on the supply voltage of each power supply device, so that the multiple power supply devices seamlessly switch to supply power to the load.

[0007] According to the power supply switching device of the tumor electric field therapy system provided in the embodiment of the present application, through the circuit optimization design of the power supply switching device, one of the multiple power supply input terminals can be connected to the power supply output terminal based on the power supply voltage of each power supply device, so that the multiple power supply devices can seamlessly switch to supply power to the load, realize seamless switching of power supply modes, and ensure that the power supply will not be interrupted during the switching process, thereby increasing the duration of the effective therapeutic electric field applied by the tumor electric field therapy device to the tissue area where the tumor is located, and improving the treatment effect.

[0008] Optionally, in some embodiments of the present application, when the multiple power supply devices include a first power supply device and a second power supply device, the power supply switching circuit includes: a first diode, the anode of the first diode is suitable for being connected to the power supply end of the first power supply device; a second diode, the anode of the second diode is suitable for being connected to the power supply end of the second power supply device, and the cathode of the second diode is connected to the cathode of the first diode and then connected to the power supply output end; a first capacitor, the first end of the first capacitor is respectively connected to the cathode of the second diode and the cathode of the first diode, and the second end of the first capacitor is grounded.

[0009] Optionally, in some embodiments of the present application, the nominal supply voltage of the first power supply device is greater than the maximum supply voltage of the second power supply device.

[0010] Optionally, in some embodiments of the present application, the first diode and the second diode are Schottky diodes or ultrafast recovery diodes, and the first capacitor is an electrolytic capacitor.

[0011] Optionally, in some embodiments of the present application, the first power supply device is an adapter power supply device, and the second power supply device is a battery power supply device.

[0012] Optionally, in some embodiments of the present application, the power supply switching circuit further includes: a controllable switch unit, which is arranged between the cathode of the second diode and the first end of the first capacitor, and is turned on or off based on the power supply voltage of the adapter power supply device and the power supply voltage of the battery power supply device, so as to enable seamless switching between the adapter power supply device and the battery power supply device.

[0013] Optionally, in some embodiments of the present application, when the battery power supply device is connected to the tumor electric field therapy system and the adapter power supply device is not connected to the tumor electric field therapy system, the controllable switch unit is turned on to supply power to the load through the battery power supply device; when the battery power supply device is connected to the tumor electric field therapy system and the adapter power supply device is connected to the tumor electric field therapy system, the controllable switch unit is turned off to supply power to the load through the adapter power supply device; when both the battery power supply device and the adapter power supply device are connected to the tumor electric field therapy system and the adapter power supply device is removed from the tumor electric field therapy system, the controllable switch unit is turned on to supply power to the load through the battery power supply device.

[0014] Optionally, in some embodiments of the present application, the controllable switch unit includes: a first MOS transistor, a second MOS transistor and a third MOS transistor, the gate of the first MOS transistor is suitable for being connected to the anode of the first diode, the drain of the first MOS transistor is suitable for being connected to the cathode of the second diode, the source of the first MOS transistor is grounded, the gate of the second MOS transistor is connected to the drain of the first MOS transistor, the drain of the second MOS transistor is suitable for being connected to the gate of the third MOS transistor, the source of the second MOS transistor is grounded, the source of the third MOS transistor is connected to the cathode of the second diode, and the drain of the third MOS transistor is suitable for being connected to the first end of the first capacitor.

[0015] Optionally, in some embodiments of the present application, the first MOS transistor and the second MOS transistor are NMOS transistors, and the third MOS transistor is a PMOS transistor.

[0016] Optionally, in some embodiments of the present application, the controllable switch unit further includes: a third diode, the anode of the third diode is connected to the anode of the first diode, and the cathode of the third diode is suitable for being connected to the gate of the first MOS tube.

[0017] In a second aspect, an embodiment of the present application further provides a tumor electric field therapy system, comprising: a plurality of power supply devices and a load, each of the plurality of power supply devices being suitable for supplying power to the load respectively so as to apply an alternating electric field to the tumor site of the human body; a power supply switching device according to the above embodiment, the power supply switching device being configured to control the plurality of power supply devices to seamlessly switch to supply power to the load based on the power supply voltage of each power supply device.

[0018] According to the tumor electric field therapy system of the embodiment of the present application, based on the circuit optimization design of the above-mentioned power supply switching device, multiple power supply devices can be seamlessly switched to supply power to the load based on the power supply voltage of each power supply device, ensuring seamless switching of power supply modes. In this way, the power supply of the tumor electric field therapy device will not be interrupted during the switching process, thereby increasing the duration of the effective therapeutic electric field applied by the tumor electric field therapy device to the tissue area where the tumor is located, and improving the treatment effect.

[0019] Optionally, in some embodiments of the present application, the tumor electric field therapy system further includes: a signal acquisition device, which is configured to collect the power supply voltage of each power supply device and the voltage of the power supply output end; an indication device; and a control device, which is respectively connected to the signal acquisition device and the indication device, and is configured to determine the power supply mode of the tumor electric field therapy system based on the power supply voltage of each power supply device and the voltage of the power supply output end, and control the indication device to issue power supply indication information.

[0020] Optionally, in some embodiments of the present application, when the multiple power supply devices include a first power supply device and a second power supply device, and the first power supply device is an adapter power supply device and the second power supply device is a battery power supply device, the control device stores a first preset voltage, a second preset voltage, a third preset voltage, a fourth preset voltage, and a fifth preset voltage, and the control device is further configured to, when the power supply voltage of the adapter power supply device is the first preset voltage, the power supply voltage of the battery power supply device is greater than or equal to zero and less than or equal to the second preset voltage, and the voltage of the power supply output terminal is equal to the power supply voltage of the adapter power supply device, control the indication device to issue a power supply indication information that the adapter is powered and there is no abnormality, wherein the first preset voltage is greater than the second preset voltage; when the power supply voltage of the adapter power supply device is zero, the power supply voltage of the battery power supply device is greater than or equal to the third preset voltage and less than or equal to the second preset voltage, and the voltage of the power supply output terminal is equal to the power supply voltage of the battery power supply device When the power supply voltage of the adapter power supply device is zero, the power supply voltage of the battery power supply device is greater than or equal to the fourth preset voltage and less than the third preset voltage, and the voltage of the power supply output terminal is equal to the power supply voltage of the battery power supply device, the indicator device is controlled to issue a power supply indication message that the battery is powered and the battery power is low; when the power supply voltage of the adapter power supply device is zero, the power supply voltage of the battery power supply device is greater than or equal to the fifth preset voltage and less than the fourth preset voltage, and the voltage of the power supply output terminal is equal to the power supply voltage of the battery power supply device, the indicator device is controlled to issue a power supply indication message that the battery is powered and the battery power is basically exhausted; when the power supply voltage of the adapter power supply device is zero, the power supply voltage of the battery power supply device is less than the fifth preset voltage, and the voltage of the power supply output terminal is equal to the power supply voltage of the battery power supply device, the indicator device is controlled to issue a power supply indication message that the battery voltage is insufficient to maintain power supply.

[0021] Optionally, in some embodiments of the present application, when the nominal supply voltage of the adapter power supply device is greater than the maximum supply voltage of the battery power supply device, and the power switching circuit does not include a controllable switch unit, the control device is further configured to, when the supply voltage of the adapter power supply device is greater than or equal to the fifth preset voltage and less than the first preset voltage, the supply voltage of the battery power supply device is greater than or equal to zero and less than or equal to the second preset voltage, the supply voltage of the adapter power supply device is greater than or equal to the supply voltage of the battery power supply device, and the voltage of the power supply output end is equal to the supply voltage of the adapter power supply device, control the indication device to issue a power supply indication message indicating that the adapter is powered and the adapter voltage is abnormal; ... When the second preset voltage is reached, the supply voltage of the adapter power supply device is less than the supply voltage of the battery power supply device, and the voltage of the power supply output end is equal to the supply voltage of the battery power supply device, the indicator device is controlled to issue power supply indication information indicating that the battery is supplying power and the adapter voltage is abnormal; when the supply voltage of the adapter power supply device is greater than zero and less than the fifth preset voltage, the supply voltage of the battery power supply device is greater than or equal to the fifth preset voltage and less than the second preset voltage, and the voltage of the power supply output end is equal to the supply voltage of the battery power supply device, the indicator device is controlled to issue power supply indication information indicating that the battery is supplying power and the adapter voltage is abnormal; when the supply voltage of the adapter power supply device is greater than zero and less than the fifth preset voltage, and the supply voltage of the battery power supply device is less than the fifth preset voltage, the indicator device is controlled to issue power supply indication information indicating that both the adapter voltage and the battery voltage are insufficient to maintain power supply.

[0022] Optionally, in some embodiments of the present application, when the power supply switching circuit includes a controllable switch unit, the control device is further configured to, when the power supply voltage of the adapter power supply device is greater than or equal to the fifth preset voltage and less than the first preset voltage, the power supply voltage of the battery power supply device is greater than or equal to zero and less than or equal to the second preset voltage, and the voltage of the power supply output end is equal to the power supply voltage of the adapter power supply device, control the indication device to issue power supply indication information that the adapter is supplying power and the adapter voltage is abnormal; and when the power supply voltage of the adapter power supply device is greater than zero and less than the fifth preset voltage, the power supply voltage of the battery power supply device is greater than or equal to zero and less than or equal to the second preset voltage, and the voltage of the power supply output end is equal to the supply voltage of the adapter power supply device, control the indication device to issue power supply indication information that both the adapter voltage and the battery voltage are insufficient to maintain power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 A structural block diagram of a tumor electric field treatment system provided in one embodiment of the present application;

[0025] Figure 2 A circuit diagram of a power supply switching device for a tumor electric field therapy system according to the first embodiment of the present application;

[0026] Figure 3 A circuit diagram of a power supply switching device for a tumor electric field therapy system according to a second embodiment of the present application;

[0027] Figure 4 A schematic diagram of an indicator light circuit provided in one embodiment of the present application;

[0028] Figure 5 A schematic diagram of a buzzer warning circuit provided in one embodiment of the present application. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are 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 making creative efforts shall fall within the scope of protection of this application.

[0030] In the related art, the tumor electric field therapy system used for tumor treatment mainly includes a tumor electric field therapy device and an electrode patch electrically connected to the tumor electric field therapy device. The tumor electric field therapy device is used to generate an alternating electric field signal of a specific frequency. The alternating electric field signal is applied to the tissue area where the tumor is located through the electrode patch attached to the skin of the human body corresponding to the lesion for electric field therapy, thereby inhibiting the proliferation or spread of tumor cells.

[0031] However, during the power supply mode switching process, the current tumor electric field therapy device needs to first turn off the power to suspend the electric field therapy, and then turn on the power again to resume the electric field therapy after the power supply mode switching is completed. This will cause the switching between power supply modes to interrupt the power supply and cause the electric field therapy to be interrupted, thereby shortening the effective electric field therapy duration and reducing the treatment effect.

[0032] To this end, the tumor electric field therapy system and power supply switching device provided in the embodiments of the present application, through circuit optimization design of the power supply switching device, enable multiple power supply devices to seamlessly switch power supply, ensuring that power supply will not be interrupted, thereby increasing the duration of the effective therapeutic electric field applied by the tumor electric field therapy device to the tissue area where the tumor is located, and improving the treatment effect.

[0033] The power supply switching device of the tumor electric field therapy system and the tumor electric field therapy system having the power supply switching device provided in the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0034] refer to Figure 1 , which is a structural block diagram of a tumor therapy field system 1000 provided in one embodiment of the present application. The tumor therapy field system 1000 includes a tumor therapy field device 100, a downstream load 160, and a power supply switching device 130. The tumor therapy field device 100 can seamlessly switch power supply via multiple power supply devices, such as a first power supply device 110 and a second power supply device 120. The power supply switching device 130 can be provided in the tumor therapy field device 100 and configured to control the seamless switching of multiple power supply devices, such as the first power supply device 110 and the second power supply device 120, to provide uninterrupted power supply to the downstream load 160. The subsequent load 160 may include an electric field generator (not shown) disposed within the tumor therapy field apparatus 100 and a plurality of electrode patches (not shown) disposed outside the tumor therapy field apparatus 100 and electrically connected to the electric field generator (not shown). The electric field generator (not shown) is powered by the first power supply 110 or the second power supply 120 to generate an alternating electrical signal. This alternating electrical signal is applied to the tissue region where the tumor is located via the electrode patches (not shown) to inhibit the proliferation or spread of tumor cells. Optionally, in some embodiments of the present application, the subsequent load 160 may further include an adapter (not shown). The alternating electrical signal generated by the electric field generator (not shown) is output through the adapter (not shown) as multiple pairs of alternating electrical signals. These multiple pairs of alternating electrical signals are alternately applied to the tissue region where the tumor is located via multiple pairs of electrode patches (not shown) to inhibit the proliferation or spread of tumor cells.

[0035] refer to Figures 1 to 3 As shown, in some embodiments of the present application, the tumor electric field therapy system 1000 includes multiple power supply devices, such as a first power supply device 110 and a second power supply device 120, and a load, namely a subsequent load 160. Each of the multiple power supply devices is suitable for supplying power to the subsequent load 160 respectively, and applying an alternating electric signal to the tumor site of the human body through multiple pairs of electrode patches (not shown) in the subsequent load 160. The power supply switching device 130 includes multiple power supply input terminals, such as Figure 2 or Figure 3Nodes ① and ② shown, and the power supply output terminal are as follows Figure 2 or Figure 3 As shown in node ③ and power supply switching circuits 1300 and 1300', each of the multiple power supply input terminals is respectively connected to the power supply terminal of the corresponding power supply device, and the power supply output terminal is connected to the subsequent load 160. The power supply switching circuit 1300 is configured to connect one of the multiple power supply input terminals to the power supply output terminal based on the supply voltage of each power supply device, so that the multiple power supply devices can seamlessly switch to supply power to the subsequent load 160.

[0036] Specifically, in one example of the present application, the multiple power supply devices may include two. The following description will be made using two power supply devices as an example, that is, the multiple power supply devices include a first power supply device 110 and a second power supply device 120. It is understandable that the power supply device may be an external power supply device independent of the tumor electric field therapy device 100, or an internal power supply device provided inside the tumor electric field therapy device 100. Exemplarily, the first power supply device 110 is an external power supply device independent of the tumor electric field therapy device 100, for example, it may be an adapter power supply device, which provides power supply via an adapter connected to the mains. The second power supply device 120 is an internal power supply device provided inside the tumor electric field therapy device 100, for example, it may be a battery power supply device, wherein the battery may be a rechargeable battery.

[0037] refer to Figure 2 As shown, in the case where the multiple power supply devices include a first power supply device 110 and a second power supply device 120, the power supply switching circuit 1300 may include a first diode D1, a second diode D2 and a first capacitor C1, the anode of the first diode D1 is suitable for being connected to the power supply end of the first power supply device 110, the anode of the second diode D2 is suitable for being connected to the power supply end of the second power supply device 120, the cathode of the second diode D2 is connected to the cathode of the first diode D1, and then to the power supply output end, that is, power output can be performed at node ③, the first end of the first capacitor C1 is respectively connected to the cathode of the second diode D2 and the cathode of the first diode D1, and the second end of the first capacitor C1 is grounded.

[0038] In an embodiment of the present application, by optimizing the design of the power supply switching circuit 1300 and cleverly utilizing the unidirectional conduction characteristics of the diode, it is possible to seamlessly switch between the first power supply device 110 and the second power supply device 120 to supply power to the load 160, so that the power supply to the subsequent load 160 will not be interrupted. In this way, electric field therapy can continue during the power supply switching process, thereby increasing the duration of the effective therapeutic electric field applied by the tumor electric field therapy device 100 to the tissue area where the tumor is located, and improving the treatment effect.

[0039] Next, the power supply switching device 130 of the tumor electric field therapy system 1000 provided by the present application is described in detail through two specific embodiments.

[0040] Example 1

[0041] like Figure 2 FIG. 1 is a circuit diagram of the power supply switching device 130 of the tumor electric field therapy system 1000 provided in the first embodiment of the present application. In this embodiment, the nominal power supply voltage output by the first power supply device 110 is greater than the maximum power supply voltage output by the second power supply device 120. The power supply switching circuit 1300 includes a first diode D1, a second diode D2, and a first capacitor C1. The anode of the first diode D1 is electrically connected to the output end of the first power supply device 110, and the cathode of the first diode D1 is electrically connected to the input end of the subsequent load 160; the anode of the second diode D2 is electrically connected to the output end of the second power supply device 120, and the cathode of the second diode D2 is electrically connected to the input end of the subsequent load 160. The first end of the first capacitor C1 is electrically connected to the cathode of the first diode D1 and the cathode of the second diode D2, and the second end of the first capacitor C1 is grounded.

[0042] Optionally, the first diode D1 and the second diode D2 are Schottky diodes or ultrafast recovery diodes, and the first capacitor C1 is an electrolytic capacitor.

[0043] In this embodiment, the first capacitor C1 not only stabilizes the voltage and reduces the voltage ripple when the power supply is turned on, but also temporarily supplies power to the subsequent load 160 to prevent voltage drops at the moment of switching between the first power supply device 110 and the second power supply device 120. This is because the first diode D1 and the second diode D2 have a cut-off time and a conduction time when they are cut off and turned on. In other words, there is a short switching period during the power supply switching process. During this switching period, neither the first power supply device 110 nor the second power supply device 120 can supply power to the subsequent load 160. This is caused by the short conduction time or off time of the diode. Therefore, the first capacitor C1 is required to temporarily supply power to the subsequent load 160 to ensure that the entire power supply is switched completely seamlessly.

[0044] It can be seen from this that the power supply switching circuit 1300 of the present application is based on the unidirectional conduction characteristics of the diode and the voltage stabilization and energy storage characteristics of the capacitor, which can ensure that the power supply will not be interrupted during the power supply switching process, and realize seamless switching of the power supply mode, thereby ensuring that the electric field therapy continues and avoiding affecting the treatment effect.

[0045] In order to ensure fast power supply switching, diodes are usually selected from Schottky diodes or ultrafast recovery diodes, because the conduction and cutoff times of such diodes are relatively short, usually in the nanosecond level. Combined with the characteristics of electrolytic capacitors, seamless power supply switching between the first power supply device 110 and the second power supply device 120 can be fully realized.

[0046] For example, the first power supply device 110 is an adapter power supply device, the second power supply device 120 is a battery power supply device, and the adapter power supply voltage is greater than the battery power supply voltage. When the adapter is not connected initially and the battery is used to power the tumor electric field therapy device 100, at this time, the reference Figure 2 As shown, the voltage at node ② is the battery output voltage, the voltage at node ① is 0V, the second diode D2 is conducting, and the first diode D1 is off, so the voltage at node ③ is the battery output voltage. When the tumor therapy field device 100 is operating normally, an adapter is inserted. At this time, the voltage at node ① changes from 0V to the adapter output voltage, which is greater than the battery output voltage at node ②. The first diode D1 conducts, causing the voltage at node ③ to become the adapter output voltage, while the second diode D2, under reverse voltage, turns off, cutting off the battery power supply, allowing the adapter to supply power to the downstream load 160. This completes the switch from battery power to adapter power. During this switch, the power supply to the downstream load 160 is not interrupted at all, thereby affecting the electric field therapy effect. When powered by the adapter, the battery can be removed or placed inside the tumor therapy field device 100. The adapter will not charge the battery inside the tumor therapy field device 100.

[0047] Furthermore, when the tumor therapy field device 100 is operating normally and needs to switch from adapter power to battery power, it is necessary to first confirm whether the battery is installed inside the tumor therapy field device 100. If there is no battery inside, it must be properly connected. After confirming that the battery is correctly installed inside the tumor therapy field device 100, the adapter power is disconnected. At this point, the voltage at node ② is the battery output voltage, the voltage at node ① is 0V, the second diode D2 is conducting, and the first diode D1 is cut off due to reverse voltage. The voltage at node ③ is the battery output voltage, and the battery supplies power to the downstream load 160. This completes the switch from adapter power to battery power. During this switching process, the power supply to the downstream load 160 is not interrupted, which would affect the therapeutic effect of the electric field therapy.

[0048] In some embodiments of the present application, Figure 3As shown, the power supply switching circuit 1300 also includes a controllable switch unit 1301, which is arranged between the cathode of the second diode D2 and the first end of the first capacitor C1, and is turned on or off based on the power supply voltage of the first power supply device 110 and the power supply voltage of the second power supply device 120, so as to enable seamless switching between the first power supply device 110 and the second power supply device 120.

[0049] Among them, when the second power supply device 120 is connected to the tumor electric field therapy system 1000 and the first power supply device 110 is not connected to the tumor electric field therapy system 1000, the controllable switch unit 1301 is turned on to supply power to the subsequent load 160 through the second power supply device 120; when the second power supply device 120 is connected to the tumor electric field therapy system 1000 and the first power supply device 110 is connected to the tumor electric field therapy system 1000, the controllable switch unit 1301 is turned off to supply power to the subsequent load 160 through the first power supply device 110; when both the first power supply device 110 and the second power supply device 120 are connected to the tumor electric field therapy system 1000 and then the first power supply device 110 is removed from the tumor electric field therapy system 1000, the controllable switch unit 1301 is turned on to supply power to the subsequent load 160 through the second power supply device 120.

[0050] In this embodiment, by setting the controllable switch unit 1301 at a suitable position, regardless of the magnitude relationship between the supply voltage output by the second power supply device 120 and the supply voltage output by the first power supply device 110, seamless switching of power supply between the two can be achieved.

[0051] Specifically, if Figure 3 As shown, the controllable switch unit 1301 includes a first MOS transistor Q1, a second MOS transistor Q2, and a third MOS transistor Q3. The gate of the first MOS transistor Q1 is adapted to be connected to the anode of the first diode D1, the drain of the first MOS transistor Q1 is adapted to be connected to the cathode of the second diode D2, the source of the first MOS transistor Q1 is grounded, the gate of the second MOS transistor Q2 is connected to the drain of the first MOS transistor Q1, the drain of the second MOS transistor Q2 is adapted to be connected to the gate of the third MOS transistor Q3, the source of the second MOS transistor Q2 is grounded, the source of the third MOS transistor Q3 is connected to the cathode of the second diode D2, and the drain of the third MOS transistor Q3 is adapted to be connected to the first end of the first capacitor C1.

[0052] The first MOS transistor Q1 and the second MOS transistor Q2 are NMOS transistors, and the third MOS transistor Q3 is a PMOS transistor.

[0053] Based on the mutual cooperation of the first MOS transistor Q1 , the second MOS transistor Q2 and the third MOS transistor Q3 , the controllable switch unit 1301 can be turned on or off, thereby achieving seamless switching between the second power supply device 120 and the first power supply device 110 .

[0054] Example 2

[0055] like Figure 3, which is a circuit diagram of the power supply switching device 130 of the tumor electric field therapy system 1000 provided in the second embodiment of the present application. In this embodiment, the supply voltage output by the first power supply device 110 can be greater than, less than, or equal to the supply voltage output by the second power supply device 120. Compared to the power supply switching circuit 1300 provided in Example 1, the power supply switching circuit 1300' of this embodiment, in addition to including a first diode D1, a second diode D2, and a first capacitor C1, further includes a controllable switch unit 1301. The controllable switch unit 1301 includes a first MOS transistor Q1, a second MOS transistor Q2, and a third MOS transistor Q3. The gate of the first MOS transistor is electrically connected to the anode of the first diode D1, the drain of the first MOS transistor is electrically connected to the cathode of the second diode D2, and the source of the first MOS transistor is grounded. The gate of the second MOS transistor is electrically connected to the drain of the first MOS transistor, the drain of the second MOS transistor is electrically connected to the gate of the third MOS transistor, and the source of the second MOS transistor is grounded. The source of the third MOS transistor is electrically connected to the cathode of the second diode, and the drain of the third MOS transistor is electrically connected to the input terminal of the subsequent load 160. The first MOS transistor Q1 and the second MOS transistor Q2 are NMOS transistors, and the third MOS transistor Q3 is a PMOS transistor. A third diode D3 and a resistor R7 may also be provided between the gate of the first MOS transistor Q1 and the anode of the first diode D1. The anode of the third diode D3 is connected to the anode of the first diode D1, and the cathode of the third diode D3 is connected to the gate of the first MOS transistor Q1 via the resistor R7. The third diode D3 prevents current backflow. The resistor R7 acts as a current-limiting resistor and, together with the resistor R8, forms a voltage divider to limit the voltage input to the gate of the first MOS transistor Q1. When the first power supply device 110 is connected, the current from the first power supply device 110 will flow into the gate of the first MOS transistor Q1. The presence of the resistor R7 limits the gate current flowing into the first MOS transistor Q1, minimizing the impact on the gate at the moment of current injection and preventing damage to the MOS transistor. Resistor R8, connected between the gate of the first MOS transistor Q1 and GND, forms a voltage divider with resistor R7 to ensure that the Vgs voltage of the first MOS transistor Q1 is greater than or equal to its own Vgs(th) voltage after being connected to the first power supply device 110, allowing it to conduct smoothly. This also ensures that the current from the first power supply device 110 does not directly flow into the gate of the first MOS transistor Q1, causing the first MOS transistor Q1 to burn out due to the excessive Vgs voltage. A resistor R10 can also be provided between the drain of the first MOS transistor Q1 and the cathode of the second diode D2. The end of resistor R10 connected to the drain of the first MOS transistor Q1 is connected to resistor R9. The end of resistor R9 connected to resistor R10 is connected to the gate of the second MOS transistor Q2. The other end of resistor R9 is grounded.The resistors R9 and R10 also form a voltage divider network. Their function is to ensure that when the first MOS transistor Q1 is off, the voltage divider formed by the resistors R9 and R10 can make the Vgs voltage of the second MOS transistor Q2 greater than or equal to the Vgs(th) voltage of the second MOS transistor Q2 itself, thereby ensuring that the second MOS transistor Q2 can be smoothly turned on. This also ensures that the current of the second power supply device 120 does not directly flow into the gate of the second MOS transistor Q2, which would cause the second MOS transistor Q2 to burn out due to the excessive Vgs voltage. A resistor R11 may be further provided between the source and gate of the third MOS transistor Q3 , and a resistor R12 may be further provided between the gate of the third MOS transistor Q3 and the drain of the second MOS transistor Q2 . The resistors R11 and R12 form a voltage divider network. The voltage divider network ensures that when the second MOS transistor Q2 is turned on, the voltage divided by the resistors R11 and R12 causes the Vgs voltage of the third MOS transistor Q3 to be less than or equal to the Vgs(th) voltage of the third MOS transistor Q3 , thereby ensuring that the third MOS transistor Q3 can be turned on smoothly.

[0056] Exemplarily, the first power supply device 110 is an adapter power supply device, and the second power supply device 120 is a battery power supply device. Figure 3 As shown, when the adapter is not initially connected and the battery is powering the tumor electric field therapy device 100, the voltage V1 at node ① is 0V, and the first MOS transistor Q1 is non-conductive (equivalent to an open circuit). The voltage V2 at node ② is the battery output voltage, and the second diode D2 is conductive. Therefore, the voltage V7 at node ⑦ is also the battery output voltage, and the voltage V5 at node ⑤ is: V5 = V7 * R9 / (R9 + R10). The voltage at node ⑤ causes the second MOS transistor to be conductive and grounded, resulting in a negative voltage between nodes ⑥ and ⑦, turning on the third MOS transistor Q3. Consequently, the voltage V3 at node ③ is the battery output voltage, and the first diode D1, due to the reverse voltage, is cut off, and the battery then supplies power to the downstream load 160.

[0057] In this embodiment, when the tumor electric field therapy device 100 is in normal working state, the battery power supply is switched to the adapter power supply, which is described in three cases: Case A is that the adapter power supply voltage is greater than the battery power supply voltage, Case B is that the adapter power supply voltage is less than the battery power supply voltage, and Case C is that the adapter power supply voltage is equal to the battery power supply voltage.

[0058] Case A: The adapter supply voltage is greater than the battery supply voltage

[0059] When the adapter is inserted, the voltage V1 at node ① becomes the adapter output voltage. This turns on the first diode D1, causing the voltage V3 at node ③ to become the adapter output voltage. Furthermore, the first MOS transistor Q1 turns on and is connected to ground, causing the voltage V5 at node ⑤ to reach 0V. This causes the second MOS transistor Q2 to turn off, eliminating the voltage difference between nodes ⑥ and ⑦ and turning off the third MOS transistor Q3. The adapter output voltage is then transmitted through the body diode of the third MOS transistor Q3, causing the voltage V7 at node ⑦ to become the adapter output voltage. The voltage V2 at node ② remains the battery output voltage. At this point, V2 < V7, and the second diode D2 reverses to cut off, disconnecting the battery power supply. The adapter then supplies power to the downstream load 160. This completes the switch from battery power to adapter power. During this switch, the power supply to the downstream load 160 is not interrupted, which could affect the electric field therapy effect.

[0060] Case B: The adapter supply voltage is lower than the battery supply voltage

[0061] When the adapter is inserted, the voltage V1 at node ① becomes the adapter output voltage. This turns on the first diode D1, causing the voltage V3 at node ③ to become the adapter output voltage. Furthermore, the first MOS transistor Q1 turns on and is connected to ground, causing the voltage V5 at node ⑤ to reach 0V. This turns off the second MOS transistor Q2, eliminating the voltage difference between nodes ⑥ and ⑦, and thus turning off the third MOS transistor Q3. However, the voltage V2 at node ② remains the battery output voltage. At this point, V2 > V3, and the second diode D2 remains conductive. The voltage V7 at node ⑦ remains the battery output voltage. Because the third MOS transistor Q3 is turned off and V7 > V3, the body diode of the third MOS transistor Q3, under reverse voltage, turns off, cutting off the battery power at the third MOS transistor Q3 and no longer providing power to the downstream load 160. The adapter then provides power to the downstream load 160. This completes the switch from battery power to adapter power. During this switch, the power supply to the downstream load 160 is not interrupted, thereby affecting the electric field therapy effect.

[0062] Case C: The adapter supply voltage is equal to the battery supply voltage

[0063] When the adapter is inserted, the voltage V1 at node ① becomes the adapter output voltage. This turns on the first diode D1, causing the voltage V3 at node ③ to become the adapter output voltage. Furthermore, the first MOS transistor Q1 turns on and is connected to ground, causing the voltage V5 at node ⑤ to reach 0V. This turns off the second MOS transistor Q2, eliminating the voltage difference between nodes ⑥ and ⑦, and consequently turning off the third MOS transistor Q3. However, the voltage V2 at node ② remains the battery output voltage. At this point, V2 = V3, and there is no voltage difference between nodes ② and ③. Therefore, the body diodes of the second diode D2 and the third MOS transistor Q3 are both turned off, cutting off the battery power at the second diode D2 and no longer supplying power to the downstream load 160. The adapter then supplies power to the downstream load 160. This completes the switch from battery power to adapter power. During this switch, power to the downstream load 160 is not interrupted, potentially affecting the electric field therapy effect.

[0064] When the tumor therapy field device 100 is operating normally and needs to switch from adapter power to battery power, it is necessary to first confirm whether the battery is installed inside the tumor therapy field device 100. If there is no battery, it must be properly connected. After confirming that the battery is properly installed inside the tumor therapy field device 100, the adapter power is disconnected. At this point, even if the adapter power supply voltage is greater than, less than, or equal to the battery power supply, the voltage V1 at node ① becomes 0V, causing the first MOS transistor Q1 to be non-conductive (equivalent to an open circuit). The voltage V2 at node ② is the battery output voltage, causing the second diode D2 to conduct. The voltage V7 at node ⑦ is also the battery output voltage, and the voltage V5 at node ⑤ is: V5 = V7 * R9 / (R9 + R10). Due to the voltage at node ⑤, the second MOS transistor Q2 is conductive and grounded, resulting in a negative voltage between nodes ⑥ and ⑦, causing the third MOS transistor Q3 to conduct, making the voltage V3 at node ③ the battery output voltage. The first diode D1, under reverse voltage, is cut off, and the battery supplies power to the downstream load 160. That is, the power supply from the adapter is switched to the battery. During the switching process, the power supply to the subsequent load 160 will not be interrupted to affect the electric field therapy effect.

[0065] Therefore, the power supply switching circuit 1300' designed in this embodiment can achieve seamless switching between battery power and adapter power regardless of the relationship between the adapter power supply voltage and the battery power supply voltage. That is, during the switching process, the power supply to the subsequent load 160 will not be interrupted to affect the electric field therapy effect.

[0066] Optionally, in some embodiments of the present application, Figure 2 or Figure 3As shown, the tumor electric field therapy device 100 also includes multiple resistor divider networks for voltage detection to determine whether there is a power supply anomaly and determine the power supply mode. Resistors R1 and R2 form a first voltage divider network for the first power supply device 110. The first end of resistor R1 is electrically connected to the power supply terminal of the first power supply device 110 and the anode of the first diode D1. The second end of resistor R1 is electrically connected to the first end of resistor R2. The second end of resistor R2 is electrically connected to the negative output terminal of the first power supply device 110 and ground (GND). The node between resistors R1 and R2 is electrically connected to the signal acquisition device 140. Resistors R5 and R6 form a second voltage divider network for the second power supply device 120. The first end of resistor R5 is electrically connected to the power supply terminal of the second power supply device 120 and the anode of the second diode D2. The second end of resistor R5 is electrically connected to the first end of resistor R6. The second end of resistor R6 is electrically connected to the negative output terminal of the second power supply device 120 and ground (GND). The node between resistors R5 and R6 is electrically connected to the signal acquisition device 140. Resistors R3 and R4 form a third voltage divider network for the power supply output. A first end of resistor R3 is electrically connected to the positive input terminal of subsequent load 160 and the cathode of first diode D1. A second end of resistor R3 is electrically connected to a first end of resistor R4. A second end of resistor R4 is electrically connected to the negative input terminal of subsequent load 160 and ground (GND). The node between resistors R3 and R4 is electrically connected to signal acquisition device 140. Therefore, signal acquisition device 140 is configured to acquire the power supply voltage and the voltage at the power supply output terminal of each power supply device.

[0067] Taking the resistor R1 and the resistor R2 forming the first voltage divider network for the first power supply device 110 as an example, the actual value of the power supply voltage is calculated. Figure 2 As shown, the signal acquisition device 140 is electrically connected to the first voltage divider network and the control device 150, respectively, and is configured to acquire the voltage signal at node ④ and transmit the voltage signal to the control device 150. The control device 150 calculates the voltage value V4 at node ④ based on the received voltage signal. Then, based on the voltage value V4 at node ④, the voltage value V1 at node ① can be calculated: V1=V4*(R1+R2) / R2. The voltage value V1 at node ① is the actual value of the power supply voltage output by the first power supply device 110. According to a similar method, the actual value V2 of the power supply voltage output by the second power supply device 120 at node ② and the actual value V3 of the power supply voltage received at node ③ can be calculated.

[0068] The control device 150 is further configured to determine the power supply mode of the tumor electric field therapy system 1000 and whether there is a power supply abnormality based on the voltage value V1 at node ①, the voltage value V2 at node ② and the voltage value V3 at node ③, so as to provide clear power supply indication information.

[0069] It can be seen that the tumor electric field therapy system 1000 of the embodiment of the present application includes multiple power supply devices and a subsequent load 160 and the power supply switching device 130 described in the above embodiment. Each of the multiple power supply devices is suitable for supplying power to the subsequent load 160 respectively to apply an alternating electrical signal to the tumor site of the human body. The power supply switching device 130 is configured to control the multiple power supply devices to seamlessly switch to supply power to the subsequent load 160 based on the power supply voltage of each power supply device.

[0070] In addition, the tumor electric field therapy system 1000 also includes a signal acquisition device 140, an indication device 170 and a control device 150. The signal acquisition device 140 is configured to collect the power supply voltage and the voltage of the power supply output end of each power supply device. The control device 150 is connected to the signal acquisition device 140 and the indication device 170 respectively. The control device 150 is configured to determine the power supply mode of the tumor electric field therapy system 1000 based on the power supply voltage and the voltage of the power supply output end of each power supply device, and control the indication device 170 to issue power supply indication information.

[0071] The indicator device 170 may include an indicator light circuit and a buzzer warning circuit.

[0072] For example, refer to Figure 4 Figure 2 shows a schematic diagram of an indicator light circuit according to an embodiment of the present application. The indicator light circuit includes a green LED for indicating the power supply status of the adapter (i.e., the first power supply device 110), a green LED and a yellow LED for indicating the power supply status of the battery (i.e., the second power supply device 120), and a red LED for indicating an abnormal power supply status. All LEDs are connected in parallel and electrically connected to a corresponding I / O terminal of the control device 150. A current-limiting resistor may also be provided between each LED and the corresponding I / O terminal of the control device 150. For ease of description, the adapter indicator light is defined as a green light, the battery indicator light as a yellow-green bicolor light, and the abnormality indicator light as a red light.

[0073] refer to Figure 5 Figure 1 is a schematic diagram of a buzzer warning circuit according to one embodiment of the present application. For ease of description, the buzzer warning circuit includes a buzzer, a freewheeling diode and a MOS transistor connected in parallel across the buzzer. The drain of the MOS transistor is electrically connected to one end of the buzzer, the source of the MOS transistor is grounded, and the gate of the MOS transistor is electrically connected to an I / O terminal of the control device 150. The control device 150 is configured to control the indicator light circuit and the buzzer warning circuit to provide clear power supply indication information.

[0074] Optionally, in one embodiment of the present application, when the multiple power supply devices include a first power supply device 110 and a second power supply device 120, and the first power supply device 110 is an adapter power supply device and the second power supply device 120 is a battery power supply device, the control device 150 stores a first preset voltage, a second preset voltage, a third preset voltage, a fourth preset voltage, and a fifth preset voltage set in descending order according to voltage values. The control device 150 is further configured to control the indication device 170 to issue a power supply indication information indicating that the adapter is supplying power and there is no abnormality when the power supply voltage of the adapter power supply device is the first preset voltage, for example, 40V, the power supply voltage of the battery power supply device is greater than or equal to zero and less than or equal to the second preset voltage, for example, 33.6V, and the voltage of the power supply output terminal is equal to the power supply voltage of the adapter power supply device, wherein the first preset voltage is greater than the second preset voltage; when the power supply voltage of the adapter power supply device is zero, the power supply voltage of the battery power supply device is greater than or equal to the third preset voltage, for example, 25.6V and less than or equal to the second preset voltage, the voltage of the power supply output terminal, etc. When the supply voltage of the battery-powered device is low, the control indicating device 170 issues a power supply indication message indicating that the device is powered by the battery and has no abnormalities. When the supply voltage of the adapter power supply device is zero, the supply voltage of the battery power supply device is greater than or equal to a fourth preset voltage, such as 24.0V, and less than the third preset voltage, and the voltage of the power output terminal is equal to the supply voltage of the battery-powered device, the control indicating device 170 issues a power supply indication message indicating that the device is powered by the battery and has low battery power. When the supply voltage of the adapter power supply device is zero, the supply voltage of the battery power supply device is greater than or equal to a fifth preset voltage, such as 22.4V, and less than the fourth preset voltage, and the voltage of the power output terminal is equal to the supply voltage of the battery-powered device, the control indicating device 170 issues a power supply indication message indicating that the device is powered by the battery and has essentially exhausted battery power. When the supply voltage of the adapter power supply device is zero, the supply voltage of the battery power supply device is less than the fifth preset voltage, and the voltage of the power output terminal is equal to the supply voltage of the battery-powered device, the control indicating device 170 issues a power supply indication message indicating that the battery voltage is insufficient to maintain power supply.

[0075] Among them, with respect to the above-mentioned first embodiment, when the nominal supply voltage of the adapter power supply device is greater than the maximum supply voltage of the battery power supply device, and the power supply switching circuit 1300 does not include the controllable switch unit 1301, the control device 150 is further configured to, when the supply voltage of the adapter power supply device is greater than or equal to the fifth preset voltage and less than the first preset voltage, the supply voltage of the battery power supply device is greater than or equal to zero and less than or equal to the second preset voltage, the supply voltage of the adapter power supply device is greater than or equal to the supply voltage of the battery power supply device, and the voltage of the power supply output end is equal to the supply voltage of the adapter power supply device, control the indicating device 170 to issue a power supply indication information indicating that the adapter is powered and the adapter voltage is abnormal; ... When the power supply voltage of the adapter power supply device is equal to the second preset voltage, the power supply voltage of the adapter power supply device is less than the power supply voltage of the battery power supply device, and the voltage of the power supply output terminal is equal to the power supply voltage of the battery power supply device, the control indication device 170 issues power supply indication information that the battery is powered and the adapter voltage is abnormal; when the power supply voltage of the adapter power supply device is greater than zero and less than the fifth preset voltage, the power supply voltage of the battery power supply device is greater than or equal to the fifth preset voltage and less than the second preset voltage, and the voltage of the power supply output terminal is equal to the power supply voltage of the battery power supply device, the control indication device 170 issues power supply indication information that the battery is powered and the adapter voltage is abnormal; when the power supply voltage of the adapter power supply device is greater than zero and less than the fifth preset voltage, and the power supply voltage of the battery power supply device is less than the fifth preset voltage, the control indication device 170 issues power supply indication information that both the adapter voltage and the battery voltage are insufficient to maintain power supply.

[0076] Furthermore, with respect to the second embodiment described above, when the power supply switching circuit 1300' includes the controllable switch unit 1301, the control device 150 is further configured to, when the power supply voltage of the adapter power supply device is greater than or equal to the fifth preset voltage and less than the first preset voltage, the power supply voltage of the battery power supply device is greater than or equal to zero and less than or equal to the second preset voltage, and the voltage of the power supply output terminal is equal to the power supply voltage of the adapter power supply device, control the indicating device 170 to issue power supply indication information indicating that the adapter is supplying power and the adapter voltage is abnormal; and when the power supply voltage of the adapter power supply device is greater than zero and less than the fifth preset voltage, the power supply voltage of the battery power supply device is greater than or equal to zero and less than or equal to the second preset voltage, and the voltage of the power supply output terminal is equal to the power supply voltage of the adapter power supply device, control the indicating device 170 to issue power supply indication information indicating that both the adapter voltage and the battery voltage are insufficient to maintain power supply.

[0077] In summary, the control device 150 is configured to determine the power supply mode of the tumor electric field therapy system 1000, for example, whether it is adapter-powered or battery-powered, based on the voltage value V1 at node ①, the voltage value V2 at node ②, and the voltage value V3 at node ③, and to determine whether there is a power supply abnormality in the tumor electric field therapy system 1000, and to control the indicator light circuit and the buzzer warning circuit to provide clear power supply indication information.

[0078] For example, the nominal supply voltage output by the adapter is 40V, the maximum supply voltage output by the battery is 33.6V, the nominal supply voltage is 28.8V, and the voltage variation range of the battery from empty to fully charged is: 22.4V-33.6V.

[0079] For the first embodiment, as shown in Table 1 below, when the adapter and the battery are connected at the same time, the control device 150 determines the power supply mode and whether there is a power supply abnormality based on the calculated voltage values ​​of V1, V2, and V3, and controls the indicator light and buzzer to display power supply indication information:

[0080] When V1=40V, 0≤V2≤33.6V and V3=V1, the power supply mode is determined to be adapter powered and the device is working normally. The adapter indicator is green, the battery indicator is yellow-green and off, the abnormal indicator is red, and the buzzer is off.

[0081] When 22.4V≤V1<40V, 0≤V2≤33.6V, V1≥V2, and V3=V1, the power supply mode is determined to be adapter-powered and the device is working normally. The adapter indicator light flashes green, the battery indicator light is off in yellow and green, the abnormal indicator light is solid red, and the buzzer beeps once long and then once shortly every minute.

[0082] When 22.4V≤V1<40V, 0≤V2≤33.6V, V1<V2, and V3=V2, the power supply mode is battery-powered and the device is working normally. The green light of the adapter indicator is off, the yellow-green dual-color light of the battery indicator flashes green, the red light of the abnormal indicator is always on, and the buzzer beeps once long and then once shortly every 1 minute.

[0083] When 0<V1<22.4V, 22.4V≤V2<33.6V and V3=V2, the power supply mode is battery-powered and the device is working normally. The green light of the adapter indicator is off, the yellow-green dual-color light of the battery indicator flashes green, the red light of the abnormal indicator is always on, and the buzzer beeps once long and then once shortly every 1 minute.

[0084] When 0<V1<22.4V, V2<22.4V and V1≥V2, V3=V1, it is judged that the power supply is insufficient and the device cannot work normally. The green light of the adapter indicator is off, the yellow-green double-color light of the battery indicator is off, the red light of the abnormal indicator is off, and the buzzer does not sound;

[0085] When 0<V1<22.4V, V2<22.4V and V1<V2, V3=V2, it is judged that the power supply is insufficient and the device cannot work normally. The green light of the adapter indicator is off, the yellow-green double-color light of the battery indicator is off, the red light of the abnormal indicator is off, and the buzzer does not sound.

[0086] When the adapter is not connected and the battery is used for power supply, the voltage V1 at node ① is 0V, and the voltage V3 at node ③ is equal to the battery output voltage V2 at node ②. The control device 150 determines whether there is an abnormality in the battery power supply based on the calculated voltage value of V2, and controls the indicator light and buzzer to display power supply indication information:

[0087] When 25.6V≤V2≤33.6V, the battery power supply is normal and the device is working normally. The green light of the adapter indicator is off, the yellow-green dual-color light of the battery indicator is always on, the red light of the abnormal indicator is off, and the buzzer is off.

[0088] When 24.0V≤V2<25.6V, the power supply battery is judged to be low and the device is working normally. The green light of the adapter indicator is off, the yellow-green dual-color light of the battery indicator is always on, the red light of the abnormal indicator is off, and the buzzer beeps once every 1 minute.

[0089] When 22.4V≤V2<24.0V, it is judged that the power supply battery is insufficient and the device is working normally. The green light of the adapter indicator is off, the yellow-green dual-color light of the battery indicator is always on, and the abnormal indicator is always on. The red light is on, and the buzzer beeps once long and then once shortly every 1 minute.

[0090] When V2 is less than 22.4V, the battery power supply is insufficient and the device cannot work properly. The green indicator of the adapter is off, the yellow-green double-color light of the battery indicator is off, the red abnormal indicator is off, and the buzzer does not sound.

[0091] Table 1

[0092]

[0093] It should be noted that when the power supply mode is adapter-powered, its output voltage is 40V in normal state, and the adapter indicator light is always on green, maintaining the normal operation of the device. When the power supply mode is adapter-powered, its output voltage is not 40V, but it can maintain normal output while maintaining the normal operation of the device, indicating that the adapter power supply is abnormal. At this time, the adapter indicator light flashes green and the abnormal indicator light is always on red to remind the user that the abnormality has occurred. At the same time, the buzzer beeps once long and then once shortly every 1 minute, giving a double reminder to remind the user to check the power supply abnormality as soon as possible to avoid affecting the effect of electric field therapy. Similarly, when the power supply mode is battery-powered, its output voltage is abnormal but it can maintain normal output while maintaining the normal operation of the device. The dual prompts of the indicator light and the buzzer remind the user to check the power supply abnormality as soon as possible to avoid affecting the effect of electric field therapy.

[0094] For the second embodiment, as shown in Table 2 below, when the adapter and the battery are connected at the same time, the control device 150 determines the power supply mode and whether there is a power supply abnormality based on the calculated voltage values ​​of V1, V2, and V3, and controls the indicator light and buzzer to display power supply indication information:

[0095] When V1=40V, 0≤V2≤33.6V and V3=V1, the power supply mode is determined to be adapter powered and the device is working normally. The adapter indicator is green, the battery indicator is yellow-green and off, the abnormal indicator is red, and the buzzer is off.

[0096] When 22.4V≤V1<40V, 0≤V2≤33.6V and V3=V1, the power supply mode is determined to be adapter powered and the device is working normally. The adapter indicator light flashes green, the battery indicator light is off in yellow and green, the abnormal indicator light is solid red, and the buzzer beeps once long and then once shortly every minute.

[0097] When 0<V1<22.4V, 0≤V2≤33.6V and V3=V1, it is judged that the power supply is insufficient and the device cannot work normally. The green light of the adapter indicator is off, the yellow-green double-color light of the battery indicator is off, the red light of the abnormal indicator is off, and the buzzer does not sound.

[0098] When the adapter is not connected and the battery is supplying power, the voltage V1 at node ① is 0V, and the voltage V3 at node ③ is equal to the battery output voltage V2 at node ②. The control device 150 determines whether there is an abnormality in the battery power supply based on the calculated voltage value of V2, and controls the indicator light and buzzer to display power supply indication information:

[0099] When 25.6V≤V2≤33.6V, the battery power supply is normal and the device is working normally. The green light of the adapter indicator is off, the yellow-green dual-color light of the battery indicator is always on, the red light of the abnormal indicator is off, and the buzzer is off.

[0100] When 24.0V≤V2<25.6V, the power supply battery is judged to be low and the device is working normally. The green light of the adapter indicator is off, the yellow-green dual-color light of the battery indicator is always on, the red light of the abnormal indicator is off, and the buzzer beeps once every 1 minute.

[0101] When 22.4V≤V2<24.0V, it is judged that the power supply battery is insufficient and the device is working normally. The green light of the adapter indicator is off, the yellow-green dual-color light of the battery indicator is always on, and the abnormal indicator is always on. The red light is on, and the buzzer beeps once long and then once shortly every 1 minute.

[0102] When V2 is less than 22.4V, the battery power supply is insufficient and the device cannot work properly. The green indicator of the adapter is off, the yellow-green double-color light of the battery indicator is off, the red abnormal indicator is off, and the buzzer does not sound.

[0103] Table 2

[0104]

[0105] In summary, the tumor therapy field system 1000 and power switching device 130 provided in the embodiments of the present application enable seamless switching between two power supply modes. This ensures that power is not interrupted during the switchover between adapter power and battery power, thereby preventing any impact on the therapeutic effect of the electric field therapy. Furthermore, the control device 150 determines the power supply mode and the presence of power supply anomalies based on the actual voltage values ​​of each node in the power switching circuits 1300 and 1300', and controls the indicator light and buzzer to display clear power supply information, significantly improving the user experience.

[0106] In the description of this specification, the terms "one embodiment", "some embodiments", "embodiments", "examples", "specific examples" or "some examples" refer to the specific features, structures, materials or characteristics described in conjunction with the embodiment or example and included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and features of different embodiments or examples, unless they are mutually inconsistent.

[0107] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A power supply switching device for a tumor electric field therapy system, characterized in that: The tumor electric field therapy system includes multiple power supply devices and loads, each of the multiple power supply devices is suitable for supplying power to the load respectively to apply an alternating electric field to the tumor site of the human body, and the power supply switching device includes: A plurality of power supply input terminals and power supply output terminals, wherein each of the plurality of power supply input terminals is respectively connected to a power supply terminal of a corresponding power supply device, and the power supply output terminal is connected to the load; A power supply switching circuit is configured to connect one of the multiple power supply input terminals to the power supply output terminal based on the power supply voltage of each power supply device, so that the multiple power supply devices seamlessly switch to supply power to the load.

2. The power supply switching device according to claim 1, wherein: In a case where the plurality of power supply devices include a first power supply device and a second power supply device, the power supply switching circuit includes: a first diode, wherein an anode of the first diode is adapted to be connected to a power supply terminal of the first power supply device; a second diode, wherein the anode of the second diode is adapted to be connected to the power supply terminal of the second power supply device, and the cathode of the second diode is connected to the cathode of the first diode and then connected to the power supply output terminal; A first capacitor, wherein a first end of the first capacitor is connected to the cathode of the second diode and the cathode of the first diode respectively, and a second end of the first capacitor is grounded.

3. The power supply switching device according to claim 2, wherein: The nominal supply voltage of the first power supply device is greater than the maximum supply voltage of the second power supply device.

4. The power supply switching device according to claim 2, wherein: The first diode and the second diode are Schottky diodes or ultrafast recovery diodes, and the first capacitor is an electrolytic capacitor.

5. The power supply switching device according to claim 3, wherein: The first power supply device is an adapter power supply device, and the second power supply device is a battery power supply device.

6. The power supply switching device according to claim 5, characterized in that: The power supply switching circuit further includes: A controllable switch unit is arranged between the cathode of the second diode and the first end of the first capacitor, and is turned on or off based on the power supply voltage of the adapter power supply device and the power supply voltage of the battery power supply device, so as to achieve seamless switching between the adapter power supply device and the battery power supply device.

7. The power supply switching device according to claim 6, characterized in that: When the battery power supply device is connected to the tumor therapy field system and the adapter power supply device is not connected to the tumor therapy field system, the controllable switch unit is turned on to supply power to the load through the battery power supply device; When the battery power supply device is connected to the tumor therapy field system and the adapter power supply device is connected to the tumor therapy field system, the controllable switch unit is turned off to supply power to the load through the adapter power supply device; When the battery power supply device and the adapter power supply device are both connected to the tumor electric field therapy system and the adapter power supply device is removed from the tumor electric field therapy system, the controllable switch unit is turned on to supply power to the load through the battery power supply device.

8. The power supply switching device according to claim 6, wherein: The controllable switch unit includes: a first MOS transistor, a second MOS transistor, and a third MOS transistor. The gate of the first MOS transistor is suitable for being connected to the anode of the first diode, the drain of the first MOS transistor is suitable for being connected to the cathode of the second diode, the source of the first MOS transistor is grounded, the gate of the second MOS transistor is connected to the drain of the first MOS transistor, the drain of the second MOS transistor is suitable for being connected to the gate of the third MOS transistor, the source of the second MOS transistor is grounded, the source of the third MOS transistor is connected to the cathode of the second diode, and the drain of the third MOS transistor is suitable for being connected to the first end of the first capacitor.

9. The power supply switching device according to claim 8, wherein: The first MOS transistor and the second MOS transistor are NMOS transistors, and the third MOS transistor is a PMOS transistor.

10. The power supply switching device according to claim 8, wherein: The controllable switch unit further includes: a third diode, an anode of the third diode is connected to the anode of the first diode, and a cathode of the third diode is suitable for being connected to the gate of the first MOS transistor.

11. A tumor electric field treatment system, characterized in that: include: A plurality of power supply devices and a load, wherein each of the plurality of power supply devices is adapted to supply power to the load respectively, so as to apply an alternating electric field to a tumor site of a human body; According to any one of claims 1 to 10, the power supply switching device is configured to control the multiple power supply devices to seamlessly switch to supply power to the load based on the power supply voltage of each power supply device.

12. The tumor electric field treatment system according to claim 11, characterized in that: Also includes: A signal acquisition device, the signal acquisition device being configured to acquire the supply voltage of each power supply device and the voltage of the power output terminal; indicating device; A control device, wherein the control device is connected to the signal acquisition device and the indication device respectively, and the control device is configured to determine the power supply mode of the tumor electric field therapy system based on the power supply voltage of each power supply device and the voltage of the power supply output terminal, and control the indication device to issue power supply indication information.

13. The tumor electric field treatment system according to claim 12, characterized in that: In a case where the multiple power supply devices include a first power supply device and a second power supply device, and the first power supply device is an adapter power supply device and the second power supply device is a battery power supply device, the control device stores a first preset voltage, a second preset voltage, a third preset voltage, a fourth preset voltage, and a fifth preset voltage, and the control device is further configured to: controlling the indicating device to issue power supply indication information indicating that the adapter is supplying power and there is no abnormality, when the power supply voltage of the adapter power supply device is the first preset voltage, the power supply voltage of the battery power supply device is greater than or equal to zero and less than or equal to the second preset voltage, and the voltage of the power output terminal is equal to the power supply voltage of the adapter power supply device, wherein the first preset voltage is greater than the second preset voltage; When the power supply voltage of the adapter power supply device is zero, the power supply voltage of the battery power supply device is greater than or equal to the third preset voltage and less than or equal to the second preset voltage, and the voltage of the power output end is equal to the power supply voltage of the battery power supply device, controlling the indicating device to issue power supply indication information indicating that the battery is powered and there is no abnormality; When the power supply voltage of the adapter power supply device is zero, the power supply voltage of the battery power supply device is greater than or equal to the fourth preset voltage and less than the third preset voltage, and the voltage of the power output end is equal to the power supply voltage of the battery power supply device, controlling the indicating device to issue a power supply indication message indicating that the battery is powered and the battery power is low; When the power supply voltage of the adapter power supply device is zero, the power supply voltage of the battery power supply device is greater than or equal to the fifth preset voltage and less than the fourth preset voltage, and the voltage of the power output end is equal to the power supply voltage of the battery power supply device, controlling the indicating device to issue power supply indication information indicating that the battery is powered and the battery power is substantially exhausted; When the power supply voltage of the adapter power supply device is zero, the power supply voltage of the battery power supply device is less than the fifth preset voltage, and the voltage of the power supply output end is equal to the power supply voltage of the battery power supply device, the indication device is controlled to issue power supply indication information that the battery voltage is insufficient to maintain power supply.

14. The tumor electric field treatment system according to claim 13, characterized in that: In the case where the nominal supply voltage of the adapter power supply device is greater than the maximum supply voltage of the battery power supply device, and the power supply switching circuit does not include a controllable switch unit, the control device is further configured to: When the power supply voltage of the adapter power supply device is greater than or equal to the fifth preset voltage and less than the first preset voltage, the power supply voltage of the battery power supply device is greater than or equal to zero and less than or equal to the second preset voltage, the power supply voltage of the adapter power supply device is greater than or equal to the power supply voltage of the battery power supply device, and the voltage of the power supply output end is equal to the power supply voltage of the adapter power supply device, controlling the indicating device to issue power supply indication information indicating that the adapter is supplying power and the adapter voltage is abnormal; When the power supply voltage of the adapter power supply device is greater than or equal to the fifth preset voltage and less than the first preset voltage, the power supply voltage of the battery power supply device is greater than or equal to zero and less than or equal to the second preset voltage, the power supply voltage of the adapter power supply device is less than the power supply voltage of the battery power supply device, and the voltage of the power supply output end is equal to the power supply voltage of the battery power supply device, controlling the indicating device to issue power supply indication information indicating that the battery power supply is provided and the adapter voltage is abnormal; When the power supply voltage of the adapter power supply device is greater than zero and less than the fifth preset voltage, the power supply voltage of the battery power supply device is greater than or equal to the fifth preset voltage and less than the second preset voltage, and the voltage of the power output end is equal to the power supply voltage of the battery power supply device, controlling the indicating device to issue power supply indication information indicating that the battery is supplying power and the adapter voltage is abnormal; When the power supply voltage of the adapter power supply device is greater than zero and less than the fifth preset voltage, and the power supply voltage of the battery power supply device is less than the fifth preset voltage, the indication device is controlled to issue power supply indication information that both the adapter voltage and the battery voltage are insufficient to maintain power supply.

15. The tumor electric field treatment system according to claim 13, wherein: In the case where the power supply switching circuit includes a controllable switch unit, the control device is further configured to: When the power supply voltage of the adapter power supply device is greater than or equal to the fifth preset voltage and less than the first preset voltage, the power supply voltage of the battery power supply device is greater than or equal to zero and less than or equal to the second preset voltage, and the voltage of the power output end is equal to the power supply voltage of the adapter power supply device, controlling the indicating device to issue power supply indication information indicating that the adapter is supplying power and the adapter voltage is abnormal; When the power supply voltage of the adapter power supply device is greater than zero and less than the fifth preset voltage, the power supply voltage of the battery power supply device is greater than or equal to zero and less than or equal to the second preset voltage, and the voltage of the power supply output end is equal to the power supply voltage of the adapter power supply device, the indicating device is controlled to issue power supply indication information that both the adapter voltage and the battery voltage are insufficient to maintain power supply.

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