CN115755721A - Startup and shutdown control circuit for implantable equipment - Google Patents
Startup and shutdown control circuit for implantable equipment Download PDFInfo
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- CN115755721A CN115755721A CN202211524631.4A CN202211524631A CN115755721A CN 115755721 A CN115755721 A CN 115755721A CN 202211524631 A CN202211524631 A CN 202211524631A CN 115755721 A CN115755721 A CN 115755721A
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Abstract
The application discloses implanted equipment on-off control circuit includes: the battery pack comprises a battery pack and a load module electrically connected between a positive electrode and a negative electrode of the battery pack; the battery protection module comprises a battery protection chip and a control switch assembly; the main control chip is used for outputting a circuit on-off signal; the control circuit is connected with a power supply pin of the battery protection chip; a power supply pin and a grounding pin of the battery protection chip are respectively connected to the positive electrode and the negative electrode of the battery pack, and a control pin of the battery protection chip is connected with a control end of the control switch assembly; the control switch assembly is located between the load module and the positive or negative pole of the battery pack. According to the technical scheme, the switching on and off of the switching component in the control circuit of the main control chip, the control circuit and the battery protection module are controlled, so that the circuit where the switching on and off load module is located can be controlled when the battery voltage is insufficient or the switching on and off is needed by the whole implantable device, and controllable switching on and off is achieved.
Description
Technical Field
The application relates to a power on/off circuit, in particular to a power on/off control circuit of an implantable device.
Background
At present, implantable devices have been widely used in the fields of medical treatment, wildlife protection, and intelligent internal devices, wherein most of the implantable devices are powered by batteries, and the batteries cannot be frequently taken out and replaced, so that the service life of the batteries needs to be prolonged as much as possible, and the replacement frequency needs to be reduced. When the voltage of the battery of the implant device is lower than the threshold value, the circuit is turned off, and the implant device stops working to enable the implant battery to reserve a part of electric quantity, so that the phenomenon that the service life of the battery is shortened and the capacity of the battery is reduced due to over discharge of the battery is avoided.
In the prior art, a battery protection chip with fixed parameter specifications is applied to avoid over-discharge of a battery, in order to meet the actual application requirements, namely low static power consumption and low industrial cost, the chip selection range is smaller, the protection requirement of an implanted device battery is far higher than that of a common battery, the protection voltage required by the commonly used battery protection chip and the implanted device battery is often not matched, and the protection capability of the battery is limited.
Disclosure of Invention
In view of this, the present application discloses a power on/off control circuit for an implantable device, so as to solve the problem that a battery protection chip in the prior art cannot well prevent the battery of the implantable device from being over-discharged. The embodiment of the application provides a switching on and shutting down control circuit of implanted equipment, includes:
the battery pack comprises a battery pack and a load module electrically connected between a positive electrode and a negative electrode of the battery pack;
the battery protection module comprises a battery protection chip and a control switch assembly; a power supply pin and a grounding pin of the battery protection chip are respectively connected to the anode and the cathode of the battery pack, and a control pin of the battery protection chip is connected with the control end of the control switch assembly; the control switch assembly is positioned between the load module and the positive pole or the negative pole of the battery pack; wherein the battery protection chip is configured to: under the condition that the input voltage of the power supply pin is smaller than a first preset voltage threshold value, outputting a turn-off signal through the control pin to control the turn-off of the control switch component, and under the condition that the input voltage of the power supply pin is larger than the first preset voltage threshold value, outputting a turn-on signal through the control pin to control the turn-on of the control switch component;
the main control chip is used for outputting a circuit conducting signal to a control end of the control circuit under the condition of receiving an equipment shutdown signal; and/or, under the condition of receiving the equipment starting signal, outputting a circuit shutdown signal to a control end of the control circuit;
the control circuit comprises the control end, a grounding end and an output end, wherein the grounding end is grounded, and the output end is connected with the power supply pin of the battery protection chip;
under the condition that a control end of the control circuit receives a circuit conduction signal output by the main control chip, an output end of the control circuit is conducted with a grounding end, so that the input voltage of a power supply pin of the battery protection chip is smaller than the first preset voltage threshold; or, 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 from 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.
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 comprise a charging control pin and a discharging control pin; wherein: the charging control pin and the discharging control pin are respectively connected with the grid electrode of the first field effect transistor and the grid electrode of the second field effect transistor; the drain electrode of the first field effect tube is connected with the drain electrode of the second field effect tube; the source electrode of the first field effect transistor is grounded, and the source electrode of the second field effect transistor is connected with one end, connected to the negative electrode of the battery pack, of the load module; or the source electrode of the first field effect transistor is electrically connected with the anode of the battery pack, and the source electrode of the second field effect transistor is connected with one end, connected to the anode of the battery pack, of the load module;
and any one of the first field effect transistor and the second field effect transistor is in a turn-off state, and the circuit is turned off.
Optionally, the first field effect transistor and the second field effect transistor are both N-channel insulated gate field effect transistors.
Optionally, the power on/off control circuit of the implantable device further includes: one end of the decoupling capacitor is connected with a power supply pin of the battery protection chip, and the other end of the decoupling capacitor is grounded;
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 is discharged to be less than the first preset voltage threshold when the output terminal of the control circuit is turned on from the ground terminal.
Optionally, the control circuit comprises: a third field effect transistor; the control pin of the main control chip comprises a GPIO interface; wherein: the GPIO interface of the main control chip is connected with the grid electrode of the third field effect transistor; the drain electrode of the third field effect transistor is connected with a power supply pin of the battery protection chip; and the source electrode of the third field effect transistor is grounded.
Optionally, the power on/off control circuit of the implantable device further includes a voltage detection module, a power supply pin and a ground pin of the voltage detection module are respectively connected to the anode and the cathode of the battery pack, and an output end of the voltage detection module is connected to the main control chip;
the voltage detection module is used for detecting the residual voltage of the battery pack and outputting a shutdown signal of the equipment to a main control chip through the output end under the condition that the voltage of the battery pack is lower than a second preset voltage threshold; and/or outputting the equipment starting signal to the main control chip through the output end under the condition that the voltage of the battery pack is greater than a second preset voltage threshold value.
Optionally, the voltage detection module is a coulometer.
Optionally, the power on/off control circuit of the implantable device further includes a communication module, where an output end of the communication module is connected to the main control chip, and is configured to establish communication connection with an external device, receive an external power off instruction signal sent by the external device through the communication connection, and output the device power off signal to the main control chip through the output end; and/or receiving an external starting indication signal sent by the external equipment through the communication connection, and outputting the equipment starting signal to a main control chip through the output end.
Optionally, the communication module comprises at least one of: near field communication module, mobile communication module.
Optionally, the power on/off control circuit of the implantable device further includes: the power supply switch is positioned between a power supply pin of the battery protection chip and the anode of the battery pack; the Hall sensor is connected with the control end of the power supply switch and used for: under the condition that magnetic field intensity is greater than the preset threshold value, to supply power switch send the break signal in order to control supply power switch disconnection, and under the condition that magnetic field intensity is less than the preset threshold value, to supply power switch send the closure signal in order to control supply power switch is closed.
According to the technical scheme, in one or more embodiments of the application, the main control chip, the control circuit and the battery protection module control circuit are used for switching on and off the switch assembly, so that the whole implantable device can switch off the circuit where the load module is located when the battery voltage is insufficient or needs to be switched off, and can switch on the circuit where the load module is located after the battery voltage meets requirements or when the implantable device needs to be switched on, without being limited by the design of the battery protection chip, thereby realizing controllable switching on and switching off and avoiding over-discharge of the battery.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art according to these drawings.
Fig. 1 is a circuit diagram of a power on/off control circuit for an implantable device according to an exemplary embodiment.
Fig. 2 is a circuit diagram of a voltage detection module and a main control chip according to an exemplary embodiment.
Fig. 3 is a circuit diagram of a communication module and a power on/off control circuit according to an exemplary embodiment.
Fig. 4 is a circuit diagram of a control circuit according to an exemplary embodiment.
Fig. 5 is a circuit diagram of a circuit management unit formed by a control circuit and a battery protection module according to an exemplary embodiment.
Fig. 6 is a circuit diagram including a hall sensor and a power switch according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
It should be noted that: in other embodiments, the steps of the respective methods are not necessarily performed in the order shown and described herein. In some other embodiments, the method may include more or fewer steps than those described herein. Moreover, individual steps described in this application may be broken down into multiple steps for description in other embodiments; multiple steps described in this application may be combined into a single step in other embodiments.
In the prior art, a battery protection chip with fixed parameter specifications is applied to avoid over-discharge of a battery, in order to meet the actual application requirements, namely low static power consumption and low industrial cost, the chip selection range is smaller, the protection requirement of an implanted device battery is far higher than that of a common battery, the protection voltage required by the commonly used battery protection chip and the implanted device battery is often not matched, and the protection capability of the battery is limited.
According to the technical scheme, the switch assembly is switched on and off in the control circuit of the main control chip, the control circuit and the battery protection module, so that the circuit where the load module is located can be switched off when the battery voltage is insufficient or needs to be shut down, the circuit where the load module is located can be switched on after the battery voltage meets the requirement or when the battery is required to be started, the design of the battery protection chip is not limited, controllable startup and shutdown can be achieved, and the over-discharge of the battery is avoided.
Fig. 1 is a circuit diagram of a switching control circuit for an implantable device according to an exemplary embodiment, where the switching 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, which are electrically connected between a positive electrode and a negative electrode of the battery pack. The battery protection module S1 includes a battery protection chip 103 and a control switch assembly 104. As shown in FIG. 1, PACK + is the positive electrode of the battery and PACK-is the negative electrode of the battery. 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 grounding end is 1022, and the output end is 1023; a control pin of the battery protection chip 103 is 1031, a ground pin is 1032, and a power supply pin is 1033; the control terminal of the control switch assembly 104 is 1041. A control pin 1011 of the main control chip 101 is connected with a control end 1021 of the control circuit 102, and a power supply pin 1012 thereof is connected with the anode of the battery pack; the output 1023 of the control circuit 102 is connected to the power supply pin 1033 of the battery protection chip 103, and the ground terminal thereof is connected to the negative pole of the battery pack; the power supply pin 1033 of the battery protection chip 103 is connected to the positive pole of the battery pack through the switch module 106, and the ground pin 1032 thereof is connected to the negative pole of the battery pack; the control pin 1031 is connected to the control terminal 1041 of the control switch component 104; the control switch assembly 104 is located between the load module 105 and the positive or negative pole of the battery pack.
Referring to the circuit shown in fig. 1, taking an example that the control switch component 104 is located between the load module 105 and the negative electrode of the battery pack, when receiving a device shutdown signal, the main control chip 101 sends a turn-on signal to the control circuit 102 to turn on the control circuit 102, where the turn-on signal may be a high level signal, and when the control circuit 102 is turned on, the voltage input to the power supply pin 1033 of the battery protection chip 103 is pulled down to be less than a first preset voltage threshold, and then the control pin 1031 of the battery protection chip 103 outputs a turn-off signal to the control switch component 104, so that the control switch component 104 is turned off; at this time, the circuit in which the load module 105 is located is disconnected, and the battery pack stops supplying power. Similarly, when receiving a device power-on signal, the main control chip 101 sends a turn-off signal to the control circuit 102 to turn off the control circuit 102, where the turn-on signal may be a low level signal, and when the control circuit 102 is turned off and the voltage input to the power supply pin 1033 of the battery protection chip 103 is greater than a first preset voltage threshold, the control pin 1031 outputs a turn-on signal to the control switch assembly 104 to turn on the control switch assembly 104, so that a circuit where the load module 105 is located forms a closed loop, and the circuit is turned on and operated.
In an embodiment, the power 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 residual voltage of group battery to under the circumstances that group battery voltage is less than the second and predetermines the voltage threshold, through its output to main control chip 101 output equipment shutdown signal, thereby make the group battery can keep partly electric quantity, avoid the battery life that the battery overdischarge leads to shorten and battery capacity reduces. In the present embodiment, a coulometer may be employed as the voltage detection module S2. As shown in fig. 2, which is a schematic diagram of a coulomb meter with model number BQ27220, a pin 4 of the coulomb meter can be used as a detection terminal and connected to the positive electrode of the battery pack, and a pin 7 can be used as an output terminal and connected to the main control chip 101. The coulometer can keep the current intensity unchanged during the use process, and the current intensity is calculated by measuring the electrifying time and the mass of the precipitate. Meanwhile, the influence of other factors such as battery aging on the measurement result can be greatly reduced by matching with the voltage and the temperature of the battery. Therefore, the coulometer can accurately track the change of the electric quantity of the battery. Meanwhile, the coulometer can set a second preset voltage threshold, and set a minimum voltage threshold for warning of battery overdischarge according to actual needs, so as to solve the problem that parameters of a battery protection chip in production and life are fixed and cannot be scheduled, for example, when the input voltage of a power supply pin 1033 of the battery protection chip 103 which is used as a low-side driving circuit is lower than 2.8V, a turn-off signal is output to a control pin 1031, an implanted device pays more attention to the service life and the capacity of a battery than a common electronic device, and hopes that the voltage of a battery pack is maintained above 3V, and at this time, the voltage detection module S2, the main control chip 101 and the control circuit 102 play a role in adjusting the protection range of the battery voltage. 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 is already turned off.
In one embodiment, the control pin 1011 of the main control chip 101 may be a GPIO interface, as shown by the black dashed box in fig. 2. GPIO (General Purpose Input/Output) is a General Purpose Input/Output port through which high and low levels can be Output. In this embodiment, when the coulometer detects that the voltage of the battery pack is lower than the second preset voltage threshold, a device shutdown signal is output to the main control chip 101 through the 7 pins; when the coulometer detects that the battery pack voltage is greater than the second preset voltage threshold, a device power-on signal is output to the main control chip 101 through the 7 pins.
In an embodiment, the power on/off control circuit for the implantable device may further include a communication module S4 for establishing a communication connection with the external device S3. Fig. 3 is a circuit diagram of a communication module S4 and a power on/off control circuit according to an exemplary embodiment. The output end of the communication module S4 is connected to the main control chip, and the communication module S4 can send a device shutdown signal to the main control chip 101 through the output end thereof, when receiving an external shutdown instruction signal sent by the external device S3; under the condition of receiving an external power-on instruction signal sent by the external device S3, the communication module S4 may also output the device power-on signal to the main control chip 101 through the output terminal thereof, thereby achieving the purpose of remotely and autonomously controlling the circuit to be powered on and powered off. Generally, the communication module S4 may be divided into a near field communication module S4 and a mobile communication module S4. Near field communication module S4 can be subdivided into bluetooth module, NFC module, WIFI module, loRa module again, and mobile communication module S4 can refer to the module based on 2G, 3G, 4G, 5G communication. The person skilled in the art can determine the specific communication module S4 according to the related art and the specific requirements, which are not limited in detail in this application.
Fig. 4 is a circuit diagram of a control circuit 102 according to an exemplary embodiment, where the control circuit 102 may be a third fet, and the third fet is an N-channel insulated gate fet (N-channel MOSFET). The field effect transistor is a novel semiconductor material, controls the current of a transistor by utilizing an electric field effect, is a semiconductor device with only one carrier participating in conduction, and is a semiconductor device with input voltage for controlling output current. The N-channel insulated gate field effect transistor is characterized in that a PN junction is respectively manufactured on two sides of an N-type semiconductor silicon wafer, and a structure that an N-type channel is clamped by two PN junctions is formed. The two P regions are grids, one end of the N-type silicon is a drain electrode, and the other end of the N-type silicon is a source electrode. The gate of the third fet may be used as the control end 1021 of the control circuit 102, and is connected to the main control chip and identified by BAT Ctrl. The gate is used for receiving a circuit conducting signal sent by the main control chip 101. The source of the third fet is grounded, and the drain is connected to the power supply pin 1033 of the battery protection chip 103 and is denoted by BATOFFCtrl. When the main control chip 101 receives the device shutdown signal, the main control chip 101 outputs a circuit turn-on signal to the gate of the third field effect transistor, where the circuit turn-on signal may be a high level signal, and at this time, the source and the drain of the third field effect transistor are turned on, so that the input voltage of the power supply pin 1033 in the battery protection chip 103 is smaller than the first preset voltage threshold, and then the control pin 1031 of the battery protection chip 103 outputs a turn-off signal to control the control switch component 104 to turn off, thereby achieving the purpose of shutdown the circuit where the load module 105 is located. When the main control chip 101 receives a device power-on signal, the main control chip 101 outputs a circuit turn-off signal to the gate of the third field-effect transistor, and the circuit turn-on signal may be a low-level signal, at this time, the source and the drain of the third field-effect transistor are turned off, so that the battery pack voltage is input to the power supply pin 1033 in the battery protection chip 103 through the switch module 106, and at this time, when the input voltage is greater than a first preset voltage threshold, the control pin 1031 of the battery protection chip 103 outputs a turn-on signal to control the control switch component 104 to turn off, thereby achieving the purpose of turning on the circuit where the load module 105 is located.
Fig. 5 is a circuit diagram formed by the control circuit 102 and the battery protection module S1 according to an exemplary embodiment, where 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 with the battery pack in series, and the R1 can limit the current charged to the decoupling capacitor C5 at the moment when the battery pack is connected, so that the voltage of the decoupling capacitor C5 slowly rises, the circuit components can be protected from being damaged due to the instant short-circuit current of the decoupling capacitor C5, and the safety of a circuit in the charging process is ensured.
As shown in fig. 5, the control switch assembly 102 may include a first fet and a second fet, both of which are N-channel insulated gate fets (N-channel MOSFETs). The control pins 103 of the battery protection chip 103 may include a charge control pin 1031a, a discharge control pin 1031b. A charging control pin (COUT) and a discharging control pin (DOUT) are respectively connected with the grid electrode of the first field effect transistor and the grid electrode of the second field effect transistor; the drain electrode of the first field effect transistor is connected with the drain electrode of the second field effect transistor; the source of the first fet is grounded and the source of the second fet is connected to the end of the load module 105 connected to the negative terminal of the battery. In this case, the first and second fets are located between the negative electrode of the load module 105 and the negative electrode of the power supply, and both fets are Low-side switches (Low-side drivers) and the above circuits are Low-side drivers. The low-side driving circuit realizes the enabling of the driving device through a closed ground wire, and a voltage boosting circuit is not needed in the driving process, so that the low-side driving circuit has lower voltage withstanding requirement on the battery protection chip. For example, the BQ29702DSET chip may be connected to the first and second fets between the negative electrode of the load module 105 and the negative electrode of the power supply, so as to form a battery protection chip of the low-side driving circuit.
In another embodiment, the source of the first fet is connected to the positive terminal of the battery pack and the source of the second fet is connected to the terminal of the load module 105 that is connected to the positive terminal of the battery pack. At this time, the first and second fets are located between the positive electrode of the power supply and the positive electrode of the load module 105, and both fets are High-side switches (High-side drivers) and the High-side drivers are High-side drivers. The high-side driving circuit realizes the enabling of the driving device by closing the power line, and a voltage boosting circuit is needed in the driving process, so that the design of the high-side driving circuit is more complicated than that of the low-side driving circuit, the voltage withstanding requirement on a battery protection chip is higher, and the technological requirement is high. For example, the BQ2980xy chip may be used to connect the first and second fets between the positive terminal of the power supply and the positive terminal of the load module 105, so as to form a battery protection chip for the high-side driver circuit.
In an embodiment, the charge control pin COUT and the discharge control pin DOUT of the battery protection chip 103 are respectively used for implementing overcharge protection and overdischarge protection for the battery, and the specific principle is as follows: when the input voltage of the power supply pin 1033 in the battery protection chip 103 reaches a preset charging voltage threshold, the level of the charging control pin COUT is changed from a high level to a low level. Because the N-channel MOS transistor is turned on when a forward voltage with a proper threshold is applied between the gate and the source, when the charge control pin COUT outputs a low level signal to the gate of the first field-effect transistor, no forward voltage exists between the gate and the source, 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 continuously decreases, when the input voltage of the power supply pin 1033 in the battery protection chip 103 decreases to the preset discharge voltage threshold, the level of the discharge control pin DOUT changes from high level to low level, and the low level signal is output to the gate of the second field effect transistor, the second field effect transistor is turned off, and the whole loop is turned off, so that the discharge process of the battery is interrupted, and the over-discharge protection effect is realized.
According to the circuit of the battery protection module S1 shown in fig. 5, when the control circuit 102 is turned on and grounded, the decoupling capacitor C5 starts to discharge, the input voltage of the power supply pin 1033 in the battery protection chip 103 is smaller than the first preset voltage threshold, and the charge control pin COUT and the discharge 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 be turned off, so that the circuit where the load module is located is turned off, and the battery pack stops supplying power. Correspondingly, when the control circuit is turned off, the battery charges the decoupling capacitor C5 after passing through the current-limiting resistor R1, and meanwhile, 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 charge control pin COUT and the discharge control pin DOUT simultaneously output high levels to the first field effect transistor and the second field effect transistor, so that the two field effect transistors are turned on, the whole on-off control circuit forms a closed loop, and the circuit recovers normal power supply.
In another embodiment, the power on/off control circuit further includes a switch module 106, the switch module 106 includes a hall sensor and a power supply switch, for example, referring to the circuit shown in fig. 6, when the control switch assembly 104 is located between the load module 105 and the negative pole of the battery pack, and in case that the intensity of the ambient magnetic field is greater than the preset threshold, the hall sensor sends an off signal to the power supply switch U9 to control the power supply switch U9 to turn off, and the off signal may be a low level signal. When the power supply switch U9 is turned off, the input voltage of the power supply pin 1033 in the battery protection chip 103 is smaller than the first preset voltage threshold, and then the control pin 1031 of the battery protection chip 103 outputs a turn-off signal to the control switch component 104, so that the control switch component 104 is turned off. At this time, the entire switch control circuit is turned off, and the power supply is stopped. Similarly, in the case that the intensity of the ambient magnetic field is smaller than the preset threshold, the hall sensor sends a closing signal to the power supply switch U9 to control the power supply switch U9 to close, and the closing signal may 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, the control pin 1031 outputs the turn-on signal to the control switch component 104, so that the control switch component 104 is turned on, the whole switch control circuit forms a closed loop, and the circuit recovers the normal power supply.
In summary, when the control circuit is powered off, an equipment power-off signal may be sent to the communication module S4 through the external equipment S3, and the equipment power-off signal is forwarded to the main control chip 101 through the output terminal to output a circuit conducting signal to the control circuit 102, so that the output terminal 1023 of the control circuit 102 is conducted with the ground terminal 1022; or the power supply switch can be controlled to be switched off by increasing the magnetic field intensity around the Hall sensor when the magnetic field intensity exceeds a preset threshold value; 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 outputs a circuit conduction signal to the control circuit 102 through the main control chip 101, so that the output end 1023 of the control circuit 102 is conducted with the ground terminal 1022; the three methods can make the input voltage of the power supply pin 1033 of the battery protection chip 103 smaller than the first preset voltage threshold, and further output the turn-off signal through the control pin 1031 to turn off the control switch assembly 104, thereby implementing power-off shutdown of the circuit where the load module is located.
Similarly, when the control circuit is required to be powered on and run, an equipment power-on signal can be sent to the communication module S4 through the external equipment S3, and the equipment power-on signal is forwarded to the main control chip 101 through the output end to output a circuit shutdown signal to the control circuit 102, so that the output end 1023 of the control circuit 102 is shut off from the ground 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 value, the power supply switch U9 is controlled to be closed; or when the battery voltage is greater than the second preset voltage threshold, the voltage detection module S2 sends an equipment power-on signal to the main control chip 101, and outputs a circuit shutdown signal to the control circuit 102 through the main control chip 101, so that the output end 1023 of the control circuit 102 is shut off from the ground terminal 1022; the three methods can make the input voltage of the power supply pin 1033 of the battery protection chip 103 greater than the first preset voltage threshold, and further output the turn-on signal through the control pin 1031 to turn on the control switch component 104, so as to implement the startup operation of the circuit where the load module is located.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (10)
1. A power on/off control circuit for an implantable device, comprising:
the battery pack comprises a battery pack and a load module electrically connected between a positive electrode and a negative electrode of the battery pack;
the battery protection module comprises a battery protection chip and a control switch assembly; a power supply pin and a grounding pin of the battery protection chip are respectively connected to the anode and the cathode of the battery pack, and a control pin of the battery protection chip is connected with the control end of the control switch assembly; the control switch assembly is positioned between the load module and the positive pole or the negative pole of the battery pack; wherein the battery protection chip is configured to: under the condition that the input voltage of the power supply pin is smaller than a first preset voltage threshold value, outputting a turn-off signal through the control pin to control the turn-off of the control switch component, and under the condition that the input voltage of the power supply pin is larger than the first preset voltage threshold value, outputting a turn-on signal through the control pin to control the turn-on of the control switch component;
the main control chip is used for outputting a circuit conducting signal to a control end of the control circuit under the condition of receiving an equipment shutdown signal; and/or, under the condition of receiving the equipment starting signal, outputting a circuit shutdown signal to a control end of the control circuit;
the control circuit comprises the control end, a grounding end and an output end, wherein the grounding end is grounded, and the output end is connected with the power supply pin of the battery protection chip;
under the condition that a control end of the control circuit receives a circuit conduction signal output by the main control chip, an output end of the control circuit is conducted with a grounding end, so that the input voltage of a power supply pin of the battery protection chip is smaller than the first preset voltage threshold; and under the condition that 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 from the grounding end, so that the positive electrode of the battery pack normally inputs voltage to a power supply pin of the battery protection chip.
2. The power on/off control circuit of the implantable device of claim 1, wherein the control switch assembly comprises a first field effect transistor, a second field effect transistor;
the control pins of the battery protection chip comprise a charging control pin and a discharging control pin;
wherein:
the charging control pin and the discharging control pin are respectively connected with the grid electrode of the first field effect transistor and the grid electrode of the second field effect transistor;
the drain electrode of the first field effect transistor is connected with the drain electrode of the second field effect transistor;
the source electrode of the first field effect transistor is grounded, and the source electrode of the second field effect transistor is connected with one end, connected to the negative electrode of the battery pack, of the load module; or the source electrode of the first field effect transistor is electrically connected with the anode of the battery pack, and the source electrode of the second field effect transistor is connected with one end, connected to the anode of the battery pack, of the load module;
and any one of the first field effect transistor and the second field effect transistor is in a turn-off state, and the circuit is turned off.
3. The on/off control circuit of an implantable device according to claim 2, wherein the first fet and the second fet are both N-channel insulated gate fets.
4. The power on/off control circuit of the implantable device of claim 1, further comprising: one end of the decoupling capacitor is connected with a power supply pin of the battery protection chip, and the other end of the decoupling capacitor is grounded; 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 is discharged to be less than the first preset voltage threshold when the output terminal of the control circuit is turned on from the ground terminal.
5. The power on/off control circuit of the implantable device of claim 1, wherein the control circuit comprises: a third field effect transistor;
the control pin of the main control chip comprises a GPIO interface;
wherein:
the GPIO interface of the main control chip is connected with the grid electrode of the third field effect transistor;
the drain electrode of the third field effect transistor is connected with a power supply pin of the battery protection chip;
and the source electrode of the third field effect transistor is grounded.
6. The power on/off control circuit of the implantable device of claim 1, further comprising:
a power supply pin and a grounding pin of the voltage detection module are respectively connected to the anode and the cathode of the battery pack, and the output end of the voltage detection module is connected with the main control chip; the voltage detection module is used for detecting the residual voltage of the battery pack and outputting the equipment shutdown signal to the main control chip through the output end under the condition that the voltage of the battery pack is lower than a second preset voltage threshold; and/or outputting the equipment starting signal to the main control chip through the output end under the condition that the voltage of the battery pack is greater than a second preset voltage threshold value.
7. The on-off control circuit of the implantable device of claim 6, wherein the voltage detection module is a coulometer.
8. The power on/off control circuit of the implantable device of claim 1, further comprising:
the output end of the communication module is connected with the main control chip and used for establishing communication connection with external equipment, receiving an external shutdown indication signal sent by the external equipment through the communication connection and outputting the equipment shutdown signal to the main control chip through the output end; and/or receiving an external starting indication signal sent by the external equipment through the communication connection, and outputting the equipment starting signal to a main control chip through the output end.
9. The power on/off control circuit of the implantable device of claim 8, wherein the communication module comprises at least one of: near field communication module, mobile communication module.
10. The power on/off control circuit of the implantable device of claim 1, further comprising a switching module;
the switch module comprises a power supply switch and a Hall sensor; the power supply switch is positioned between a power supply pin of the battery protection chip and the anode of the battery pack;
the Hall sensor is connected with the control end of the power supply switch and used for: and under the condition that the magnetic field intensity is greater than a preset threshold value, sending an opening signal to the power supply switch to control the power supply switch to be opened, and under the condition that the magnetic field intensity is less than the preset threshold value, sending a closing signal to the power supply switch to control the power supply switch to be closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211524631.4A CN115755721A (en) | 2022-11-30 | 2022-11-30 | Startup and shutdown control circuit for implantable equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211524631.4A CN115755721A (en) | 2022-11-30 | 2022-11-30 | Startup and shutdown control circuit for implantable equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115755721A true CN115755721A (en) | 2023-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211524631.4A Pending CN115755721A (en) | 2022-11-30 | 2022-11-30 | Startup and shutdown control circuit for implantable equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115755721A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117154897A (en) * | 2023-10-30 | 2023-12-01 | 广东高普达集团股份有限公司 | Battery pack processing device and electronic equipment |
| CN117220242A (en) * | 2023-11-08 | 2023-12-12 | 荣耀终端有限公司 | Method, circuit and related device for controlling stability of power supply circuit |
-
2022
- 2022-11-30 CN CN202211524631.4A patent/CN115755721A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117154897A (en) * | 2023-10-30 | 2023-12-01 | 广东高普达集团股份有限公司 | Battery pack processing device and electronic equipment |
| CN117154897B (en) * | 2023-10-30 | 2024-04-09 | 广东高普达集团股份有限公司 | Battery pack processing device and electronic equipment |
| CN117220242A (en) * | 2023-11-08 | 2023-12-12 | 荣耀终端有限公司 | Method, circuit and related device for controlling stability of power supply circuit |
| CN117220242B (en) * | 2023-11-08 | 2024-04-12 | 荣耀终端有限公司 | Method, circuit and related device for controlling stability of power supply circuit |
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