A power-on / off control circuit for an implantable device

Abstract

The present application discloses an on-off control circuit for an implantable device, comprising: a battery pack, and a load module electrically connected between the positive and negative electrodes of the battery pack; a battery protection module, which includes a battery protection chip and a control switch assembly; a main control chip for outputting a circuit on-off signal; a control circuit connected to the power supply pin of the battery protection chip; the power supply pin and the ground pin of the battery protection chip are respectively connected to the positive and negative electrodes of the battery pack, and the control pin of the battery protection chip is connected to the control end of the control switch assembly; the control switch assembly is located between the load module and the positive or negative electrode of the battery pack. According to the technical solution of the present application, the on-off of the switch assembly in the circuit is controlled by the main control chip, the control circuit and the battery protection module, so that the entire implantable device can control the on-off of the circuit where the load module is located when the battery voltage is insufficient or when on-off is required, realizing controllable on-off.

Description

Technical Field

[0001] The present application relates to a power-on and power-off circuit, and particularly to a power-on and power-off control circuit for an implantable device. Background Art

[0002] At present, implantable devices have been more widely used in the fields of medical treatment, wildlife protection, intelligent in-vivo devices, etc. Among them, most implantable devices are powered by batteries, and the batteries cannot be frequently taken out for replacement. Therefore, it is necessary to extend the battery life as much as possible and reduce the replacement times. When the battery voltage of the implant device is lower than the threshold value, the circuit is turned off, and the implant device stops working, which can keep a part of the power of the implant battery and prevent the battery from being over-discharged, resulting in shortening the battery service life and reducing the battery capacity.

[0003] In the prior art, battery protection chips with fixed parameter specifications are mostly used to avoid over-discharge of the battery. To meet the actual application requirements, that is, low static power consumption and low industrial cost, the selection range of such chips is small, and the protection requirements for the implantable device battery are much higher than those of ordinary batteries. The commonly used battery protection chips often do not match the protection voltage required by the implantable device battery, and the protection ability for the battery is limited. Summary of the Invention

[0004] In view of this, the present application discloses a power-on and power-off control circuit for an implantable device to solve the problem that the battery protection chip in the prior art cannot well prevent over-discharge of the implantable device battery. An embodiment of the present application provides a power-on and power-off control circuit for an implantable device, including:

[0005] A battery pack and a load module electrically connected between the positive and negative electrodes of the battery pack;

[0006] A battery protection module, which includes a battery protection chip and a control switch assembly; the power supply pin and the ground pin of the battery protection chip are respectively connected to the positive electrode and the negative electrode of the battery pack, and the control pin of the battery protection chip is connected to the control end of the control switch assembly; the control switch assembly is located between the load module and the positive electrode or the negative electrode of the battery pack; wherein, the battery protection chip is configured to: when the input voltage of the power supply pin is less than a first preset voltage threshold, output a turn-off signal through the control pin to control the control switch assembly to turn off, and when the input voltage of the power supply pin is greater than the first preset voltage threshold, output a turn-on signal through the control pin to control the control switch assembly to turn on;

[0007] A main control chip, configured to output a circuit turn-on signal to the control end of the control circuit when receiving a device shutdown signal; and / or, output a circuit turn-off signal to the control end of the control circuit when receiving a device startup signal;

[0008] The control circuit includes the control terminal, a ground terminal, and an output terminal. The ground terminal is kept grounded, and the output terminal is connected to the power supply pin of the battery protection chip;

[0009] Wherein, when the control terminal of the control circuit receives the circuit conduction signal output by the main control chip, the output terminal of the control circuit is conducted with the ground terminal, so that the input voltage of the power supply pin of the battery protection chip is less than the first preset voltage threshold; or, when the control terminal of the control circuit receives the circuit turn-off signal output by the main control chip, the output terminal of the control circuit is turned off from the ground terminal, so that the positive electrode of the battery pack normally inputs voltage to the power supply pin of the battery protection chip.

[0010] Optionally, the control switch assembly includes a first field effect transistor and a second field effect transistor; the control pins of the battery protection chip include a charge control pin and a discharge control pin; wherein: the charge control pin and the discharge control pin are respectively connected to the gate of the first field effect transistor and the gate of the second field effect transistor; the drain of the first field effect transistor is connected to the drain of the second field effect transistor; the source of the first field effect transistor is grounded, and the source of the second field effect transistor is connected to one end of the load module connected to the negative electrode of the battery pack; or, the source of the first field effect transistor is electrically connected to the positive electrode of the battery pack, and the source of the second field effect transistor is connected to one end of the load module connected to the positive electrode of the battery pack;

[0011] When any one of the first field effect transistor and the second field effect transistor is in the off state, the circuit shuts down.

[0012] Optionally, both the first field effect transistor and the second field effect transistor are N-channel insulated gate field effect transistors.

[0013] Optionally, the on-off control circuit of the implantable device further includes: a decoupling capacitor, one end of which is connected to the power supply pin of the battery protection chip, and the other end is grounded;

[0014] The decoupling capacitor is charged to be greater than the first preset voltage threshold when the output terminal of the control circuit is turned off from the ground terminal, and discharges to be less than the first preset voltage threshold when the output terminal of the control circuit is conducted with the ground terminal.

[0015] Optionally, the control circuit includes: a third field effect transistor; the control pin of the main control chip includes a GPIO interface; wherein: the GPIO interface of the main control chip is connected to the gate of the third field effect transistor; the drain of the third field effect transistor is connected to the power supply pin of the battery protection chip; the source of the third field effect transistor is grounded.

[0016] Optionally, the power-on / off control circuit of the implantable device further includes a voltage detection module. The power supply pin and the ground pin of the voltage detection module are respectively connected to the positive electrode and the negative electrode of the battery pack, and the output end of the voltage detection module is connected to the main control chip;

[0017] Wherein, the voltage detection module is used to detect the remaining voltage of the battery pack, and when the voltage of the battery pack is lower than a second preset voltage threshold, output the device shutdown signal to the main control chip through the output end; and / or, when the voltage of the battery pack is greater than the second preset voltage threshold, output the device startup signal to the main control chip through the output end.

[0018] Optionally, the voltage detection module is a coulomb meter.

[0019] Optionally, the power-on / off control circuit of the implantable device further includes a communication module. The output end of the communication module is connected to the main control chip, and is used to establish a communication connection with an external device, and when receiving an external shutdown instruction signal sent by the external device through the communication connection, output the device shutdown signal to the main control chip through the output end; and / or, when receiving an external startup instruction signal sent by the external device through the communication connection, output the device startup signal to the main control chip through the output end.

[0020] Optionally, the communication module includes at least one of the following: a near-field communication module, a mobile communication module.

[0021] Optionally, the power-on / off control circuit of the implantable device further includes: a power supply switch, which is located between the power supply pin of the battery protection chip and the positive electrode of the battery pack; a Hall sensor, which is connected to the control end of the power supply switch and is used for: when the magnetic field strength is greater than a preset threshold, sending a disconnection signal to the power supply switch to control the power supply switch to disconnect, and when the magnetic field strength is less than the preset threshold, sending a closing signal to the power supply switch to control the power supply switch to close.

[0022] As can be seen from the above technical solutions, in one or more embodiments of the present application, by controlling the on / off of the switch components in the main control chip, the control circuit and the battery protection module control circuit, the entire implantable device can turn off the circuit where the load module is located when the battery voltage is insufficient or shutdown is required, and can turn on the circuit where the load module is located when the battery voltage meets the requirements or startup is required, without being limited by the design of the battery protection chip, so that controllable power-on / off can be realized and battery over-discharge can be avoided.

[0023] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit the present application. Brief Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0025] Figure 1 is a circuit diagram of a power-on / off control circuit for an implantable device provided by an exemplary embodiment.

[0026] Figure 2 is a circuit diagram of a voltage detection module and a main control chip provided by an exemplary embodiment.

[0027] Figure 3 is a circuit diagram of a communication module and a power-on / off control circuit provided by an exemplary embodiment.

[0028] Figure 4 is a circuit diagram of a control circuit provided by an exemplary embodiment.

[0029] Figure 5 is a circuit diagram of a circuit management unit composed of a control circuit and a battery protection module provided by an exemplary embodiment.

[0030] Figure 6 is a circuit diagram of a circuit including a Hall sensor and a power supply switch provided by an exemplary embodiment. Detailed Description of the Embodiments

[0031] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description involves the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0032] It should be noted that: in other embodiments, the steps of the corresponding methods are not necessarily executed in the order shown and described in the present application. In some other embodiments, the steps included in the method may be more or less than those described in the present application. In addition, a single step described in the present application may be decomposed into multiple steps for description in other embodiments; and multiple steps described in the present application may also be combined into a single step for description in other embodiments.

[0033] In the prior art, battery protection chips with fixed parameter specifications are mostly used to avoid over-discharging of the battery. To meet the actual application requirements, that is, low static power consumption and low industrial cost, the selection range of such chips is small, and the protection requirements of the implanted device battery are much higher than those of ordinary batteries. The commonly used battery protection chips often do not match the protection voltage required by the implanted device battery, and the protection ability for the battery is limited.

[0034] The technical solution of the present application controls the on / off of the switch components in the main control chip, the control circuit, and the battery protection module control circuit, so that the entire implanted device can turn off the circuit where the load module is located when the battery voltage is insufficient or shutdown is required, and can turn on the circuit where the load module is located when the battery voltage reaches the requirement or startup is required, without being limited by the design of the battery protection chip, thereby enabling controllable startup and shutdown and avoiding over-discharging of the battery.

[0035] Figure 1 It is a circuit diagram of a startup and shutdown control circuit for an implanted device provided by an exemplary embodiment. The startup and shutdown control circuit includes a battery pack, and a load module 105, a battery protection module S1, a main control chip 101, a control circuit 102, and a switch module 106 electrically connected between the positive and negative electrodes of the battery pack. Among them, the battery protection module S1 includes a battery protection chip 103 and a control switch component 104. As Figure 1 shown, PACK+ is the positive electrode of the battery pack, and PACK- is the negative electrode of the battery pack. The control pin of the main control chip 101 is 1011, and the power supply pin is 1012; the control end of the control circuit is 1021, the ground end is 1022, and the output end is 1023; the control pin of the battery protection chip 103 is 1031, the ground pin is 1032, and the power supply pin is 1033; the control end of the control switch component 104 is 1041. The control pin 1011 of the main control chip 101 is connected to the control end 1021 of the control circuit 102, and its power supply pin 1012 is connected to the positive electrode of the battery pack; the output end 1023 of the control circuit 102 is connected to the power supply pin 1033 of the battery protection chip 103, and its ground end is connected to the negative electrode of the battery pack; the power supply pin 1033 of the battery protection chip 103 is connected to the positive electrode of the battery pack through the switch module 106, and its ground pin 1032 is connected to the negative electrode of the battery pack; the control pin 1031 is connected to the control end 1041 of the control switch component 104; the control switch component 104 is located between the load module 105 and the positive or negative electrode of the battery pack.

[0036] Refer to Figure 1Taking the circuit shown as an example where the control switch component 104 is located between the load module 105 and the negative pole of the battery pack, when receiving the device shutdown signal, the main control chip 101 sends a conduction signal to the control circuit 102 to make the control circuit 102 conductive. This conduction signal can be a high-level signal. After the control circuit 102 is conductive, the voltage of the power supply pin 1033 input to the battery protection chip 103 is pulled down to be less than the first preset voltage threshold. Subsequently, the control pin 1031 of the battery protection chip 103 outputs a shutdown signal to the control switch component 104, causing the control switch component 104 to turn off. At this time, the circuit where the load module 105 is located is disconnected, and the battery pack stops supplying power. Similarly, when receiving the device startup signal, the main control chip 101 sends a shutdown signal to the control circuit 102 to make the control circuit 102 turn off. This conduction signal can be a low-level signal. After the control circuit 102 is turned off, when the voltage of the power supply pin 1033 input to the battery protection chip 103 is greater than the first preset voltage threshold, the control pin 1031 outputs a conduction signal to the control switch component 104, causing the control switch component 104 to turn on. The circuit where the load module 105 is located forms a closed loop, and the circuit powers on and operates.

[0037] In an embodiment, the on-off control circuit for the implantable device may further include a voltage detection module S2. The detection end of the voltage detection module S2 is connected to the battery pack, and the output end is connected to the main control chip 101. This voltage detection module S2 can detect the remaining voltage of the battery pack and, when the battery pack voltage is lower than the second preset voltage threshold, output a device shutdown signal to the main control chip 101 through its output end, so that the battery pack can reserve a part of the power, avoiding the shortening of the battery service life and the reduction of the battery capacity caused by over-discharging of the battery. In this embodiment, a coulomb meter can be used as the voltage detection module S2. As Figure 2As shown in the figure, it is a schematic diagram of a coulomb meter with the model number BQ27220. The 4-pin of the coulomb meter can be used as a detection terminal and is connected to the positive electrode of the battery pack. The 7-pin is used as an output terminal and is connected to the main control chip 101. During the use of the coulomb meter, the current intensity can be kept constant, and the current intensity is calculated by measuring the power-on time and the mass of the deposited substance. At the same time, combined with the battery voltage and temperature, the influence of other factors such as battery aging on the measurement results can be greatly reduced. Therefore, the coulomb meter can accurately track the change of the battery power. At the same time, the coulomb meter can set a second preset voltage threshold, and according to actual needs, set the lowest voltage threshold for battery over-discharge warning, so as to solve the problem that the parameters of the battery protection chip in production and life are fixed and cannot be adjusted. For example, when the input voltage of the power supply pin 1033 of the battery protection chip 103, such as BQ29702DSET, which is used as a low-side drive circuit, is lower than 2.8V, a turn-off signal is output to the control pin 1031. Implantable devices pay more attention to the battery life and capacity than common electronic devices and hope to maintain the battery pack voltage above 3V. At this time, the voltage detection module S2, the main control chip 101, and the control circuit 102 play a role in adjusting the battery voltage protection range. The second preset voltage threshold is usually higher than the first preset voltage threshold. That is, in this embodiment, when the battery voltage is lower than the second preset voltage threshold, the circuit where the load module is located has been turned off.

[0038] In one embodiment, the control pin 1011 of the main control chip 101 can be a GPIO interface, as Figure 2 shown by the black dotted box. GPIO (General Purpose Input / Output) is a general-purpose input / output port, and high and low levels can be output through this port. In this embodiment, when the coulomb meter detects that the battery pack voltage is lower than the second preset voltage threshold, it outputs a device shutdown signal to the main control chip 101 through the 7-pin; when the coulomb meter detects that the battery pack voltage is greater than the second preset voltage threshold, it outputs a device startup signal to the main control chip 101 through the 7-pin.

[0039] In one embodiment, the on-off control circuit for implantable devices may further include a communication module S4 for establishing a communication connection with an external device S3. Figure 3It is a circuit diagram composed of a communication module S4 and a power-on / off control circuit provided by an exemplary embodiment. The output end of the communication module S4 is connected to the main control chip. The communication module S4 can send a device shutdown signal to the main control chip 101 through its output end when receiving an external shutdown indication signal sent by an external device S3; when receiving an external startup indication signal sent by the external device S3, the communication module S4 can also output the device startup signal to the main control chip 101 through its output end, so as to achieve the purpose of remotely and autonomously controlling the power-on and power-off of the circuit. Generally, the communication module S4 can be divided into a near-field communication module S4 and a mobile communication module S4. The near-field communication module S4 can be further subdivided into a Bluetooth module, an NFC module, a WIFI module, and a LoRa module, while the mobile communication module S4 can refer to a module based on 2G, 3G, 4G, or 5G communication. Those skilled in the art can determine the specific communication module S4 according to relevant technologies and specific requirements, and the present application does not make a detailed limitation on this.

[0040] Figure 4It is a circuit diagram of a control circuit 102 provided by an exemplary embodiment. The control circuit 102 can be a third field-effect transistor, which is an N-channel insulated-gate field-effect transistor (N-channel MOSFET). The field-effect transistor is a relatively new semiconductor material that uses the electric field effect to control the current of the transistor. It is a semiconductor device in which only one type of carrier participates in conduction and is a semiconductor device that uses an input voltage to control the output current. The N-channel insulated-gate field-effect transistor has a structure in which two PN junctions are fabricated on both sides of an N-type semiconductor silicon wafer, forming a structure with two PN junctions sandwiching an N-type channel. The two P regions are the gate electrodes, one end of the N-type silicon is the drain electrode, and the other end is the source electrode. The gate of the third field-effect transistor can serve as the control terminal 1021 of the control circuit 102, connected to the main control chip and identified by BAT Ctrl. The gate is used to receive the circuit conduction signal sent by the main control chip 101. The source of the third field-effect transistor is kept grounded, and its drain is connected to the power supply pin 1033 of the battery protection chip 103, identified by BATOFFCtrl. When the main control chip 101 receives the device shutdown signal, the main control chip 101 will output a circuit conduction signal to the gate of the third field-effect transistor. This circuit conduction signal can be a high-level signal. At this time, the source and drain of the third field-effect transistor are conducted, causing the input voltage of the power supply pin 1033 in the battery protection chip 103 to be less than the first preset voltage threshold. Then, a disconnection signal is output through the control pin 1031 of the battery protection chip 103 to control the disconnection of the control switch assembly 104, achieving the purpose of shutting down the circuit where the load module 105 is located. When the main control chip 101 receives the device startup signal, the main control chip 101 will output a circuit disconnection signal to the gate of the third field-effect transistor. This circuit conduction signal can be a low-level signal. At this time, the source and drain of the third field-effect transistor are disconnected, causing the battery pack voltage to be input to the power supply pin 1033 in the battery protection chip 103 through the switch module 106. When the input voltage is greater than the first preset voltage threshold in this case, a conduction signal will be output through the control pin 1031 of the battery protection chip 103 to control the disconnection of the control switch assembly 104, achieving the purpose of starting up the circuit where the load module 105 is located.

[0041] Figure 5 It is a circuit diagram of a control circuit 102 and a battery protection module S1 provided by an exemplary embodiment. Among them, C5 and C6 are decoupling capacitors. One end of the decoupling capacitor C5 is connected to the power supply pin 1033 of the battery protection chip 103, and the other end is grounded. The current-limiting resistor R1 is connected in series with the battery pack. R1 can limit the current for charging the decoupling capacitor C5 when the battery pack is connected instantaneously, causing the voltage of the decoupling capacitor C5 to rise slowly, thereby protecting the circuit components from being damaged by the instantaneous short-circuit current of the decoupling capacitor C5 and ensuring the safety of the circuit during the charging process.

[0042] Such as Figure 5As shown in the figure, the control switch assembly 102 may include a first field effect transistor and a second field effect transistor, and both of these field effect transistors are N-channel insulated gate field effect transistors (N-channel MOSFETs). The control pins 103 of the battery protection chip 103 may include a charge control pin 1031a and a discharge control pin 1031b. The charge control pin (COUT) and the discharge control pin (DOUT) are respectively connected to the gates of the first field effect transistor and the second field effect transistor; the drain of the first field effect transistor is connected to the drain of the second field effect transistor; the source of the first field effect transistor is grounded, and the source of the second field effect transistor is connected to one end of the load module 105 that is connected to the negative electrode of the battery pack. In this case, the first and second field effect transistors are located between the negative electrode of the load module 105 and the negative electrode of the power supply, and the two field effect transistors are low-side switches, and the above circuit is a low-side driver circuit. The low-side driver circuit enables the driving device by closing the ground wire, and a voltage boosting circuit is not required during the driving process. Therefore, the low-side driver circuit has a lower withstand voltage requirement for the battery protection chip. For example, the BQ29702DSET chip can be used to connect the first and second field effect transistors located between the negative electrode of the load module 105 and the negative electrode of the power supply to make it a battery protection chip of the low-side driver circuit.

[0043] In another embodiment, the source of the first field effect transistor is connected to the positive electrode of the battery pack, and the source of the second field effect transistor is connected to one end of the load module 105 that is connected to the positive electrode of the battery pack. At this time, the first and second field effect transistors are located between the positive electrode of the power supply and the positive electrode of the load module 105, and the two field effect transistors are high-side switches, and the circuit is a high-side driver circuit. The high-side driver circuit enables the driving device by closing the power supply line, and a voltage boosting circuit is required during the driving process. Therefore, the design of the high-side driver circuit is more complex than that of the low-side driver circuit, and the withstand voltage requirement for the battery protection chip is higher, and the process requirement is high. For example, the BQ2980xy chip can be used to connect the first and second field effect transistors located between the positive electrode of the power supply and the positive electrode of the load module 105 to make it a battery protection chip of the high-side driver circuit.

[0044] In one embodiment, the charging control pin COUT and the discharging control pin DOUT of the battery protection chip 103 are respectively used to implement overcharge protection and over-discharge protection for the battery. The specific principle is as follows: When charging the battery, the battery voltage rises slowly. When the input voltage of the power supply pin 1033 in the battery protection chip 103 reaches the preset charging voltage threshold, the level of the charging control pin COUT changes from high level to low level. Since the N-channel MOS transistor conducts only when a proper threshold forward voltage is applied between the gate and the source, when the charging control pin COUT outputs a low-level signal to the gate of the first field-effect transistor, there is no forward voltage between the gate and the source, and the first field-effect transistor is turned off, and the entire circuit is turned off, thereby interrupting the charging process of the battery and achieving the overcharge protection effect. Correspondingly, when the battery discharges through the load, the battery voltage will continue to drop. When the input voltage of the power supply pin 1033 in the battery protection chip 103 drops to the preset discharging voltage threshold, the level of the discharging control pin DOUT changes from high level to low level, and this low-level signal is output to the gate of the second field-effect transistor, and the second field-effect transistor is turned off, and the entire circuit is turned off, thereby interrupting the discharging process of the battery and achieving the over-discharge protection effect.

[0045] According to Figure 5 For the battery protection module S1 circuit shown, when the control circuit 102 is turned on and grounded, the decoupling capacitor C5 starts to discharge, and the input voltage of the power supply pin 1033 in the battery protection chip 103 is less than the first preset voltage threshold. The charging control pin COUT and the discharging control pin DOUT simultaneously output low levels to the first field-effect transistor and the second field-effect transistor to control the two field-effect transistors to disconnect, so that the circuit where the load module is located is disconnected and the battery pack stops supplying power. Correspondingly, when the control circuit is turned off, the battery charges the decoupling capacitor C5 through the current-limiting resistor R1. At the same time, the input voltage of the power supply pin 1033 in the battery protection chip 103 is greater than the first preset voltage threshold. The charging control pin COUT and the discharging control pin DOUT simultaneously output high levels to the first field-effect transistor and the second field-effect transistor, causing the two field-effect transistors to conduct, and the entire power-on and power-off control circuit forms a closed loop, and the circuit resumes normal power supply.

[0046] In another embodiment, the power-on and power-off control circuit further includes a switch module 106. The switch module 106 includes a Hall sensor and a power supply switch. Refer to Figure 6Taking the circuit shown as an example where the control switch component 104 is located between the load module 105 and the negative pole of the battery pack, when the ambient magnetic field strength is greater than the preset threshold, the Hall sensor sends a disconnection signal to the power supply switch U9 to control the disconnection of the power supply switch U9, and this disconnection signal can be a low-level signal. After the power supply switch U9 is disconnected, the input voltage of the power supply pin 1033 in the battery protection chip 103 is less than the first preset voltage threshold, and then the control pin 1031 of the battery protection chip 103 will output a shutdown signal to the control switch component 104, causing the control switch component 104 to shut down. At this time, the entire switch control circuit is disconnected and the power supply stops. Similarly, when the ambient magnetic field strength is less than the preset threshold, the Hall sensor sends a closing signal to the power supply switch U9 to control the closing of the power supply switch U9, and this closing signal can be a high-level signal. At this time, the input voltage of the power supply pin 1033 in the battery protection chip 103 is greater than the first preset voltage threshold, and the control pin 1031 outputs a conduction signal to the control switch component 104, causing the control switch component 104 to conduct, and the entire switch control circuit forms a closed loop, and the circuit resumes normal power supply.

[0047] Based on the foregoing, when wanting to control the circuit to power off and shut down, an equipment shutdown signal can be sent from the external device S3 to the communication module S4, and forwarded through the output terminal to the main control chip 101 to output a circuit conduction signal to the control circuit 102, causing the output terminal 1023 of the control circuit 102 to conduct with the ground terminal 1022; or, the magnetic field strength around the Hall sensor can be increased, and when the magnetic field strength exceeds the preset threshold, the power supply switch is controlled to disconnect; or when the battery voltage is lower than the second preset voltage threshold, the voltage detection module S2 sends an equipment shutdown signal to the main control chip 101, and the main control chip 101 outputs a circuit conduction signal to the control circuit 102, causing the output terminal 1023 of the control circuit 102 to conduct with the ground terminal 1022; all of the above three methods can make the input voltage of the power supply pin 1033 of the battery protection chip 103 less than the first preset voltage threshold, and then output a shutdown signal through the control pin 1031 to cause the control switch component 104 to shut down, realizing the power off and shutdown of the circuit where the load module is located.

[0048] Similarly, when wanting to control the circuit to start running, an equipment start signal can be sent to the communication module S4 by an external device S3, and the output end forwards it to the main control chip 101 to output a circuit turn-off signal to the control circuit 102, so that the output end 1023 of the control circuit 102 is turned off from the grounding end 1022; or, the magnetic field intensity around the Hall sensor can be reduced, and when the magnetic field intensity is lower than a preset threshold, the power supply switch U9 is controlled to close; or when the battery voltage is greater than a second preset voltage threshold, the voltage detection module S2 sends an equipment start signal to the main control chip 101, and the main control chip 101 outputs a circuit turn-off signal to the control circuit 102, so that the output end 1023 of the control circuit 102 is turned off from the grounding end 1022; the above three methods can all make the input voltage of the power supply pin 1033 of the battery protection chip 103 greater than a first preset voltage threshold, and then output a conduction signal through the control pin 1031 to make the control switch assembly 104 conduct, realizing the start of the circuit where the load module is located.

[0049] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of protection of the present application.

Claims

1. A power-on / off control circuit for an implantable device, characterized in that, Comprising: A battery pack and a load module electrically connected between the positive and negative electrodes of the battery pack; A battery protection module, which includes a battery protection chip and a control switch assembly; the power supply pin and the ground pin of the battery protection chip are respectively connected to the positive electrode and the negative electrode of the battery pack, and the control pin of the battery protection chip is connected to the control end of the control switch assembly; the control switch assembly is located between the load module and the positive electrode or the negative electrode of the battery pack; wherein, the battery protection chip is configured to: when the input voltage of the power supply pin is less than a first preset voltage threshold, output a turn-off signal through the control pin to control the control switch assembly to turn off, and when the input voltage of the power supply pin is greater than the first preset voltage threshold, output a turn-on signal through the control pin to control the control switch assembly to turn on; A main control chip, configured to output a circuit turn-on signal to the control end of the control circuit when receiving a device shutdown signal; and / or, output a circuit turn-off signal to the control end of the control circuit when receiving a device startup signal; The control circuit includes the control end, a ground end, and an output end, the ground end is kept grounded, and the output end is connected to the power supply pin of the battery protection chip; Wherein, when the control end of the control circuit receives the circuit turn-on signal output by the main control chip, the output end of the control circuit is turned on with the ground end, so that the input voltage of the power supply pin of the battery protection chip is less than the first preset voltage threshold; when the control end of the control circuit receives the circuit turn-off signal output by the main control chip, the output end of the control circuit is turned off with the ground end, so that the positive electrode of the battery pack normally inputs voltage to the power supply pin of the battery protection chip.

2. The power-on / off control circuit of the implantable device according to claim 1, wherein, The control switch assembly includes a first field effect transistor and a second field effect transistor; The control pins of the battery protection chip include a charge control pin and a discharge control pin; Wherein: The charge control pin and the discharge control pin are respectively connected to the gate of the first field effect transistor and the gate of the second field effect transistor; The drain of the first field effect transistor is connected to the drain of the second field effect transistor; The source of the first field effect transistor is grounded, and the source of the second field effect transistor is connected to one end of the load module connected to the negative electrode of the battery pack; or, the source of the first field effect transistor is electrically connected to the positive electrode of the battery pack, and the source of the second field effect transistor is connected to one end of the load module connected to the positive electrode of the battery pack; When any one of the first field effect transistor and the second field effect transistor is in the off state, the circuit shuts down.

3. The power-on and power-off control circuit of the implantable device according to claim 2, characterized in that, The first field effect transistor and the second field effect transistor are both N-channel insulated gate field effect transistors.

4. The power-on / off control circuit of the implantable device according to claim 1, wherein, Further comprising: A decoupling capacitor, one end of which is connected to the power supply pin of the battery protection chip and the other end is grounded; the decoupling capacitor is charged to a voltage greater than the first preset voltage threshold when the output terminal and the ground terminal of the control circuit are turned off, and discharged to a voltage less than the first preset voltage threshold when the output terminal and the ground terminal of the control circuit are turned on.

5. The power-on and power-off control circuit of the implantable device according to claim 1, characterized in that, The control circuit includes: a third field effect transistor; The control pin of the main control chip includes a GPIO interface; Wherein: The GPIO interface of the main control chip is connected to the gate of the third field effect transistor; The drain of the third field effect transistor is connected to the power supply pin of the battery protection chip; The source of the third field effect transistor is grounded.

6. The power-on / off control circuit of the implantable device according to claim 1, wherein It further includes: A voltage detection module, the power supply pin and the ground pin of which are respectively connected to the positive electrode and the negative electrode of the battery pack, and the output terminal of the voltage detection module is connected to the main control chip; wherein, the voltage detection module is used to detect the remaining voltage of the battery pack, and when the voltage of the battery pack is lower than the second preset voltage threshold, send the device shutdown signal to the main control chip through the output terminal; and / or, when the voltage of the battery pack is greater than the second preset voltage threshold, send the device startup signal to the main control chip through the output terminal.

7. The power-on and power-off control circuit of the implantable device according to claim 6, wherein The voltage detection module is a coulomb meter.

8. The power-on and power-off control circuit of the implantable device according to claim 1, characterized in that, It further includes: A communication module, the output terminal of which is connected to the main control chip, used to establish a communication connection with an external device, and when receiving an external shutdown instruction signal sent by the external device through the communication connection, send the device shutdown signal to the main control chip through the output terminal; and / or, when receiving an external startup instruction signal sent by the external device through the communication connection, send the device startup signal to the main control chip through the output terminal.

9. The power-on / off control circuit of the implantable device according to claim 8, characterized in that, The communication module includes at least one of the following: a near field communication module, a mobile communication module.

10. The power-on / off control circuit of the implantable device according to claim 1, characterized in that, It further includes a switch module; The switch module includes a power supply switch and a Hall sensor; the power supply switch is located between the power supply pin of the battery protection chip and the positive electrode of the battery pack; The Hall sensor is connected to the control end of the power supply switch and is used to: send a disconnection signal to the power supply switch to control the power supply switch to disconnect when the magnetic field strength is greater than the preset threshold, and send a closing signal to the power supply switch to control the power supply switch to close when the magnetic field strength is less than the preset threshold.

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